ConnectivityService.java revision caf1f0bf0e1588dfa5386136fc048378f300a1ab
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_FOREGROUND; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 31import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 32import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 33import static android.net.NetworkPolicyManager.RULE_ALLOW_METERED; 34import static android.net.NetworkPolicyManager.RULE_NONE; 35import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 36import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 37import static android.net.NetworkPolicyManager.RULE_TEMPORARY_ALLOW_METERED; 38import static android.net.NetworkPolicyManager.uidRulesToString; 39 40import android.annotation.Nullable; 41import android.app.BroadcastOptions; 42import android.app.NotificationManager; 43import android.app.PendingIntent; 44import android.content.BroadcastReceiver; 45import android.content.ContentResolver; 46import android.content.Context; 47import android.content.Intent; 48import android.content.IntentFilter; 49import android.content.pm.PackageManager; 50import android.content.res.Configuration; 51import android.content.res.Resources; 52import android.database.ContentObserver; 53import android.net.ConnectivityManager; 54import android.net.ConnectivityManager.PacketKeepalive; 55import android.net.IConnectivityManager; 56import android.net.INetworkManagementEventObserver; 57import android.net.INetworkPolicyListener; 58import android.net.INetworkPolicyManager; 59import android.net.INetworkStatsService; 60import android.net.LinkProperties; 61import android.net.LinkProperties.CompareResult; 62import android.net.Network; 63import android.net.NetworkAgent; 64import android.net.NetworkCapabilities; 65import android.net.NetworkConfig; 66import android.net.NetworkInfo; 67import android.net.NetworkInfo.DetailedState; 68import android.net.NetworkMisc; 69import android.net.NetworkQuotaInfo; 70import android.net.NetworkRequest; 71import android.net.NetworkState; 72import android.net.NetworkUtils; 73import android.net.Proxy; 74import android.net.ProxyInfo; 75import android.net.RouteInfo; 76import android.net.UidRange; 77import android.net.Uri; 78import android.net.metrics.DefaultNetworkEvent; 79import android.net.metrics.IpConnectivityLog; 80import android.net.metrics.NetworkEvent; 81import android.os.Binder; 82import android.os.Build; 83import android.os.Bundle; 84import android.os.FileUtils; 85import android.os.Handler; 86import android.os.HandlerThread; 87import android.os.IBinder; 88import android.os.INetworkManagementService; 89import android.os.Looper; 90import android.os.Message; 91import android.os.Messenger; 92import android.os.ParcelFileDescriptor; 93import android.os.PowerManager; 94import android.os.Process; 95import android.os.RemoteException; 96import android.os.ResultReceiver; 97import android.os.SystemClock; 98import android.os.SystemProperties; 99import android.os.UserHandle; 100import android.os.UserManager; 101import android.provider.Settings; 102import android.security.Credentials; 103import android.security.KeyStore; 104import android.telephony.TelephonyManager; 105import android.text.TextUtils; 106import android.util.ArraySet; 107import android.util.LocalLog; 108import android.util.LocalLog.ReadOnlyLocalLog; 109import android.util.Log; 110import android.util.Pair; 111import android.util.Slog; 112import android.util.SparseArray; 113import android.util.SparseBooleanArray; 114import android.util.SparseIntArray; 115import android.util.Xml; 116 117import com.android.internal.R; 118import com.android.internal.annotations.GuardedBy; 119import com.android.internal.annotations.VisibleForTesting; 120import com.android.internal.app.IBatteryStats; 121import com.android.internal.net.LegacyVpnInfo; 122import com.android.internal.net.NetworkStatsFactory; 123import com.android.internal.net.VpnConfig; 124import com.android.internal.net.VpnInfo; 125import com.android.internal.net.VpnProfile; 126import com.android.internal.util.AsyncChannel; 127import com.android.internal.util.IndentingPrintWriter; 128import com.android.internal.util.MessageUtils; 129import com.android.internal.util.WakeupMessage; 130import com.android.internal.util.XmlUtils; 131import com.android.server.am.BatteryStatsService; 132import com.android.server.connectivity.DataConnectionStats; 133import com.android.server.connectivity.KeepaliveTracker; 134import com.android.server.connectivity.Nat464Xlat; 135import com.android.server.connectivity.LingerMonitor; 136import com.android.server.connectivity.NetworkAgentInfo; 137import com.android.server.connectivity.NetworkDiagnostics; 138import com.android.server.connectivity.NetworkMonitor; 139import com.android.server.connectivity.NetworkNotificationManager; 140import com.android.server.connectivity.NetworkNotificationManager.NotificationType; 141import com.android.server.connectivity.PacManager; 142import com.android.server.connectivity.PermissionMonitor; 143import com.android.server.connectivity.Tethering; 144import com.android.server.connectivity.Vpn; 145import com.android.server.net.BaseNetworkObserver; 146import com.android.server.net.LockdownVpnTracker; 147 148import com.google.android.collect.Lists; 149 150import org.xmlpull.v1.XmlPullParser; 151import org.xmlpull.v1.XmlPullParserException; 152 153import java.io.File; 154import java.io.FileDescriptor; 155import java.io.FileNotFoundException; 156import java.io.FileReader; 157import java.io.IOException; 158import java.io.PrintWriter; 159import java.net.Inet4Address; 160import java.net.InetAddress; 161import java.net.UnknownHostException; 162import java.util.ArrayDeque; 163import java.util.ArrayList; 164import java.util.Arrays; 165import java.util.Collection; 166import java.util.HashMap; 167import java.util.HashSet; 168import java.util.List; 169import java.util.Map; 170import java.util.Objects; 171import java.util.SortedSet; 172import java.util.TreeSet; 173 174/** 175 * @hide 176 */ 177public class ConnectivityService extends IConnectivityManager.Stub 178 implements PendingIntent.OnFinished { 179 private static final String TAG = ConnectivityService.class.getSimpleName(); 180 181 private static final boolean DBG = true; 182 private static final boolean VDBG = false; 183 184 private static final boolean LOGD_RULES = false; 185 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 186 187 // TODO: create better separation between radio types and network types 188 189 // how long to wait before switching back to a radio's default network 190 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 191 // system property that can override the above value 192 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 193 "android.telephony.apn-restore"; 194 195 // How long to wait before putting up a "This network doesn't have an Internet connection, 196 // connect anyway?" dialog after the user selects a network that doesn't validate. 197 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 198 199 // Default to 30s linger time-out. Modifiable only for testing. 200 private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; 201 private static final int DEFAULT_LINGER_DELAY_MS = 30_000; 202 @VisibleForTesting 203 protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it. 204 205 // How long to delay to removal of a pending intent based request. 206 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 207 private final int mReleasePendingIntentDelayMs; 208 209 private Tethering mTethering; 210 211 private final PermissionMonitor mPermissionMonitor; 212 213 private KeyStore mKeyStore; 214 215 @GuardedBy("mVpns") 216 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 217 218 private boolean mLockdownEnabled; 219 private LockdownVpnTracker mLockdownTracker; 220 221 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 222 private Object mRulesLock = new Object(); 223 /** Currently active network rules by UID. */ 224 @GuardedBy("mRulesLock") 225 private SparseIntArray mUidRules = new SparseIntArray(); 226 /** Set of ifaces that are costly. */ 227 @GuardedBy("mRulesLock") 228 private ArraySet<String> mMeteredIfaces = new ArraySet<>(); 229 /** Flag indicating if background data is restricted. */ 230 @GuardedBy("mRulesLock") 231 private boolean mRestrictBackground; 232 233 final private Context mContext; 234 private int mNetworkPreference; 235 // 0 is full bad, 100 is full good 236 private int mDefaultInetConditionPublished = 0; 237 238 private int mNumDnsEntries; 239 240 private boolean mTestMode; 241 private static ConnectivityService sServiceInstance; 242 243 private INetworkManagementService mNetd; 244 private INetworkStatsService mStatsService; 245 private INetworkPolicyManager mPolicyManager; 246 247 private String mCurrentTcpBufferSizes; 248 249 private static final int ENABLED = 1; 250 private static final int DISABLED = 0; 251 252 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 253 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class, 254 NetworkAgentInfo.class }); 255 256 private enum ReapUnvalidatedNetworks { 257 // Tear down networks that have no chance (e.g. even if validated) of becoming 258 // the highest scoring network satisfying a NetworkRequest. This should be passed when 259 // all networks have been rematched against all NetworkRequests. 260 REAP, 261 // Don't reap networks. This should be passed when some networks have not yet been 262 // rematched against all NetworkRequests. 263 DONT_REAP 264 }; 265 266 private enum UnneededFor { 267 LINGER, // Determine whether this network is unneeded and should be lingered. 268 TEARDOWN, // Determine whether this network is unneeded and should be torn down. 269 } 270 271 /** 272 * used internally to change our mobile data enabled flag 273 */ 274 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 275 276 /** 277 * used internally to clear a wakelock when transitioning 278 * from one net to another. Clear happens when we get a new 279 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 280 * after a timeout if no network is found (typically 1 min). 281 */ 282 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 283 284 /** 285 * used internally to reload global proxy settings 286 */ 287 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 288 289 /** 290 * PAC manager has received new port. 291 */ 292 private static final int EVENT_PROXY_HAS_CHANGED = 16; 293 294 /** 295 * used internally when registering NetworkFactories 296 * obj = NetworkFactoryInfo 297 */ 298 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 299 300 /** 301 * used internally when registering NetworkAgents 302 * obj = Messenger 303 */ 304 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 305 306 /** 307 * used to add a network request 308 * includes a NetworkRequestInfo 309 */ 310 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 311 312 /** 313 * indicates a timeout period is over - check if we had a network yet or not 314 * and if not, call the timeout callback (but leave the request live until they 315 * cancel it. 316 * includes a NetworkRequestInfo 317 */ 318 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 319 320 /** 321 * used to add a network listener - no request 322 * includes a NetworkRequestInfo 323 */ 324 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 325 326 /** 327 * used to remove a network request, either a listener or a real request 328 * arg1 = UID of caller 329 * obj = NetworkRequest 330 */ 331 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 332 333 /** 334 * used internally when registering NetworkFactories 335 * obj = Messenger 336 */ 337 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 338 339 /** 340 * used internally to expire a wakelock when transitioning 341 * from one net to another. Expire happens when we fail to find 342 * a new network (typically after 1 minute) - 343 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 344 * a replacement network. 345 */ 346 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 347 348 /** 349 * Used internally to indicate the system is ready. 350 */ 351 private static final int EVENT_SYSTEM_READY = 25; 352 353 /** 354 * used to add a network request with a pending intent 355 * obj = NetworkRequestInfo 356 */ 357 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 358 359 /** 360 * used to remove a pending intent and its associated network request. 361 * arg1 = UID of caller 362 * obj = PendingIntent 363 */ 364 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 365 366 /** 367 * used to specify whether a network should be used even if unvalidated. 368 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 369 * arg2 = whether to remember this choice in the future (1 or 0) 370 * obj = network 371 */ 372 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 373 374 /** 375 * used to specify whether a network should not be penalized when it becomes unvalidated. 376 */ 377 private static final int EVENT_SET_AVOID_UNVALIDATED = 35; 378 379 /** 380 * used to ask the user to confirm a connection to an unvalidated network. 381 * obj = network 382 */ 383 private static final int EVENT_PROMPT_UNVALIDATED = 29; 384 385 /** 386 * used internally to (re)configure mobile data always-on settings. 387 */ 388 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 389 390 /** 391 * used to add a network listener with a pending intent 392 * obj = NetworkRequestInfo 393 */ 394 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 395 396 /** 397 * Indicates a caller has requested to have its callback invoked with 398 * the latest LinkProperties or NetworkCapabilities. 399 * 400 * arg1 = UID of caller 401 * obj = NetworkRequest 402 */ 403 private static final int EVENT_REQUEST_LINKPROPERTIES = 32; 404 private static final int EVENT_REQUEST_NETCAPABILITIES = 33; 405 406 /** 407 * Used internally to (re)configure avoid bad wifi setting. 408 */ 409 private static final int EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI = 34; 410 411 /** Handler thread used for both of the handlers below. */ 412 @VisibleForTesting 413 protected final HandlerThread mHandlerThread; 414 /** Handler used for internal events. */ 415 final private InternalHandler mHandler; 416 /** Handler used for incoming {@link NetworkStateTracker} events. */ 417 final private NetworkStateTrackerHandler mTrackerHandler; 418 419 private boolean mSystemReady; 420 private Intent mInitialBroadcast; 421 422 private PowerManager.WakeLock mNetTransitionWakeLock; 423 private String mNetTransitionWakeLockCausedBy = ""; 424 private int mNetTransitionWakeLockSerialNumber; 425 private int mNetTransitionWakeLockTimeout; 426 private final PowerManager.WakeLock mPendingIntentWakeLock; 427 428 // used in DBG mode to track inet condition reports 429 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 430 private ArrayList mInetLog; 431 432 // track the current default http proxy - tell the world if we get a new one (real change) 433 private volatile ProxyInfo mDefaultProxy = null; 434 private Object mProxyLock = new Object(); 435 private boolean mDefaultProxyDisabled = false; 436 437 // track the global proxy. 438 private ProxyInfo mGlobalProxy = null; 439 440 private PacManager mPacManager = null; 441 442 final private SettingsObserver mSettingsObserver; 443 444 private UserManager mUserManager; 445 446 NetworkConfig[] mNetConfigs; 447 int mNetworksDefined; 448 449 // the set of network types that can only be enabled by system/sig apps 450 List mProtectedNetworks; 451 452 private DataConnectionStats mDataConnectionStats; 453 454 TelephonyManager mTelephonyManager; 455 456 private KeepaliveTracker mKeepaliveTracker; 457 private NetworkNotificationManager mNotifier; 458 private LingerMonitor mLingerMonitor; 459 460 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 461 private final static int MIN_NET_ID = 100; // some reserved marks 462 private final static int MAX_NET_ID = 65535; 463 private int mNextNetId = MIN_NET_ID; 464 465 // sequence number of NetworkRequests 466 private int mNextNetworkRequestId = 1; 467 468 // NetworkRequest activity String log entries. 469 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 470 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 471 472 // NetworkInfo blocked and unblocked String log entries 473 // TODO: consider reducing memory usage. Each log line is ~40 2B chars, for a total of ~8kB. 474 private static final int MAX_NETWORK_INFO_LOGS = 100; 475 private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); 476 477 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 478 private static final int MAX_VALIDATION_LOGS = 10; 479 private static class ValidationLog { 480 final Network mNetwork; 481 final String mNetworkExtraInfo; 482 final ReadOnlyLocalLog mLog; 483 484 ValidationLog(Network network, String networkExtraInfo, ReadOnlyLocalLog log) { 485 mNetwork = network; 486 mNetworkExtraInfo = networkExtraInfo; 487 mLog = log; 488 } 489 } 490 private final ArrayDeque<ValidationLog> mValidationLogs = 491 new ArrayDeque<ValidationLog>(MAX_VALIDATION_LOGS); 492 493 private void addValidationLogs(ReadOnlyLocalLog log, Network network, String networkExtraInfo) { 494 synchronized(mValidationLogs) { 495 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 496 mValidationLogs.removeLast(); 497 } 498 mValidationLogs.addFirst(new ValidationLog(network, networkExtraInfo, log)); 499 } 500 } 501 502 private final IpConnectivityLog mMetricsLog; 503 504 /** 505 * Implements support for the legacy "one network per network type" model. 506 * 507 * We used to have a static array of NetworkStateTrackers, one for each 508 * network type, but that doesn't work any more now that we can have, 509 * for example, more that one wifi network. This class stores all the 510 * NetworkAgentInfo objects that support a given type, but the legacy 511 * API will only see the first one. 512 * 513 * It serves two main purposes: 514 * 515 * 1. Provide information about "the network for a given type" (since this 516 * API only supports one). 517 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 518 * the first network for a given type changes, or if the default network 519 * changes. 520 */ 521 private class LegacyTypeTracker { 522 523 private static final boolean DBG = true; 524 private static final boolean VDBG = false; 525 526 /** 527 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 528 * Each list holds references to all NetworkAgentInfos that are used to 529 * satisfy requests for that network type. 530 * 531 * This array is built out at startup such that an unsupported network 532 * doesn't get an ArrayList instance, making this a tristate: 533 * unsupported, supported but not active and active. 534 * 535 * The actual lists are populated when we scan the network types that 536 * are supported on this device. 537 * 538 * Threading model: 539 * - addSupportedType() is only called in the constructor 540 * - add(), update(), remove() are only called from the ConnectivityService handler thread. 541 * They are therefore not thread-safe with respect to each other. 542 * - getNetworkForType() can be called at any time on binder threads. It is synchronized 543 * on mTypeLists to be thread-safe with respect to a concurrent remove call. 544 * - dump is thread-safe with respect to concurrent add and remove calls. 545 */ 546 private final ArrayList<NetworkAgentInfo> mTypeLists[]; 547 548 public LegacyTypeTracker() { 549 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 550 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 551 } 552 553 public void addSupportedType(int type) { 554 if (mTypeLists[type] != null) { 555 throw new IllegalStateException( 556 "legacy list for type " + type + "already initialized"); 557 } 558 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 559 } 560 561 public boolean isTypeSupported(int type) { 562 return isNetworkTypeValid(type) && mTypeLists[type] != null; 563 } 564 565 public NetworkAgentInfo getNetworkForType(int type) { 566 synchronized (mTypeLists) { 567 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 568 return mTypeLists[type].get(0); 569 } 570 } 571 return null; 572 } 573 574 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 575 boolean isDefaultNetwork) { 576 if (DBG) { 577 log("Sending " + state + 578 " broadcast for type " + type + " " + nai.name() + 579 " isDefaultNetwork=" + isDefaultNetwork); 580 } 581 } 582 583 /** Adds the given network to the specified legacy type list. */ 584 public void add(int type, NetworkAgentInfo nai) { 585 if (!isTypeSupported(type)) { 586 return; // Invalid network type. 587 } 588 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 589 590 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 591 if (list.contains(nai)) { 592 return; 593 } 594 synchronized (mTypeLists) { 595 list.add(nai); 596 } 597 598 // Send a broadcast if this is the first network of its type or if it's the default. 599 final boolean isDefaultNetwork = isDefaultNetwork(nai); 600 if ((list.size() == 1) || isDefaultNetwork) { 601 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 602 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 603 } 604 } 605 606 /** Removes the given network from the specified legacy type list. */ 607 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 608 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 609 if (list == null || list.isEmpty()) { 610 return; 611 } 612 final boolean wasFirstNetwork = list.get(0).equals(nai); 613 614 synchronized (mTypeLists) { 615 if (!list.remove(nai)) { 616 return; 617 } 618 } 619 620 final DetailedState state = DetailedState.DISCONNECTED; 621 622 if (wasFirstNetwork || wasDefault) { 623 maybeLogBroadcast(nai, state, type, wasDefault); 624 sendLegacyNetworkBroadcast(nai, state, type); 625 } 626 627 if (!list.isEmpty() && wasFirstNetwork) { 628 if (DBG) log("Other network available for type " + type + 629 ", sending connected broadcast"); 630 final NetworkAgentInfo replacement = list.get(0); 631 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 632 sendLegacyNetworkBroadcast(replacement, state, type); 633 } 634 } 635 636 /** Removes the given network from all legacy type lists. */ 637 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 638 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 639 for (int type = 0; type < mTypeLists.length; type++) { 640 remove(type, nai, wasDefault); 641 } 642 } 643 644 // send out another legacy broadcast - currently only used for suspend/unsuspend 645 // toggle 646 public void update(NetworkAgentInfo nai) { 647 final boolean isDefault = isDefaultNetwork(nai); 648 final DetailedState state = nai.networkInfo.getDetailedState(); 649 for (int type = 0; type < mTypeLists.length; type++) { 650 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 651 final boolean contains = (list != null && list.contains(nai)); 652 final boolean isFirst = contains && (nai == list.get(0)); 653 if (isFirst || contains && isDefault) { 654 maybeLogBroadcast(nai, state, type, isDefault); 655 sendLegacyNetworkBroadcast(nai, state, type); 656 } 657 } 658 } 659 660 private String naiToString(NetworkAgentInfo nai) { 661 String name = (nai != null) ? nai.name() : "null"; 662 String state = (nai.networkInfo != null) ? 663 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 664 "???/???"; 665 return name + " " + state; 666 } 667 668 public void dump(IndentingPrintWriter pw) { 669 pw.println("mLegacyTypeTracker:"); 670 pw.increaseIndent(); 671 pw.print("Supported types:"); 672 for (int type = 0; type < mTypeLists.length; type++) { 673 if (mTypeLists[type] != null) pw.print(" " + type); 674 } 675 pw.println(); 676 pw.println("Current state:"); 677 pw.increaseIndent(); 678 synchronized (mTypeLists) { 679 for (int type = 0; type < mTypeLists.length; type++) { 680 if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; 681 for (NetworkAgentInfo nai : mTypeLists[type]) { 682 pw.println(type + " " + naiToString(nai)); 683 } 684 } 685 } 686 pw.decreaseIndent(); 687 pw.decreaseIndent(); 688 pw.println(); 689 } 690 } 691 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 692 693 @VisibleForTesting 694 protected HandlerThread createHandlerThread() { 695 return new HandlerThread("ConnectivityServiceThread"); 696 } 697 698 public ConnectivityService(Context context, INetworkManagementService netManager, 699 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 700 this(context, netManager, statsService, policyManager, new IpConnectivityLog()); 701 } 702 703 @VisibleForTesting 704 protected ConnectivityService(Context context, INetworkManagementService netManager, 705 INetworkStatsService statsService, INetworkPolicyManager policyManager, 706 IpConnectivityLog logger) { 707 if (DBG) log("ConnectivityService starting up"); 708 709 mMetricsLog = logger; 710 mDefaultRequest = createInternetRequestForTransport(-1, NetworkRequest.Type.REQUEST); 711 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); 712 mNetworkRequests.put(mDefaultRequest, defaultNRI); 713 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 714 715 mDefaultMobileDataRequest = createInternetRequestForTransport( 716 NetworkCapabilities.TRANSPORT_CELLULAR, NetworkRequest.Type.BACKGROUND_REQUEST); 717 718 mHandlerThread = createHandlerThread(); 719 mHandlerThread.start(); 720 mHandler = new InternalHandler(mHandlerThread.getLooper()); 721 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 722 723 // setup our unique device name 724 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 725 String id = Settings.Secure.getString(context.getContentResolver(), 726 Settings.Secure.ANDROID_ID); 727 if (id != null && id.length() > 0) { 728 String name = new String("android-").concat(id); 729 SystemProperties.set("net.hostname", name); 730 } 731 } 732 733 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 734 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 735 736 mLingerDelayMs = SystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); 737 738 mContext = checkNotNull(context, "missing Context"); 739 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 740 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 741 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 742 mKeyStore = KeyStore.getInstance(); 743 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 744 745 try { 746 mPolicyManager.setConnectivityListener(mPolicyListener); 747 mRestrictBackground = mPolicyManager.getRestrictBackground(); 748 } catch (RemoteException e) { 749 // ouch, no rules updates means some processes may never get network 750 loge("unable to register INetworkPolicyListener" + e); 751 } 752 753 final PowerManager powerManager = (PowerManager) context.getSystemService( 754 Context.POWER_SERVICE); 755 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 756 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 757 com.android.internal.R.integer.config_networkTransitionTimeout); 758 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 759 760 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 761 762 // TODO: What is the "correct" way to do determine if this is a wifi only device? 763 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 764 log("wifiOnly=" + wifiOnly); 765 String[] naStrings = context.getResources().getStringArray( 766 com.android.internal.R.array.networkAttributes); 767 for (String naString : naStrings) { 768 try { 769 NetworkConfig n = new NetworkConfig(naString); 770 if (VDBG) log("naString=" + naString + " config=" + n); 771 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 772 loge("Error in networkAttributes - ignoring attempt to define type " + 773 n.type); 774 continue; 775 } 776 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 777 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 778 n.type); 779 continue; 780 } 781 if (mNetConfigs[n.type] != null) { 782 loge("Error in networkAttributes - ignoring attempt to redefine type " + 783 n.type); 784 continue; 785 } 786 mLegacyTypeTracker.addSupportedType(n.type); 787 788 mNetConfigs[n.type] = n; 789 mNetworksDefined++; 790 } catch(Exception e) { 791 // ignore it - leave the entry null 792 } 793 } 794 795 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 796 if (mNetConfigs[TYPE_VPN] == null) { 797 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 798 // don't need to add TYPE_VPN to mNetConfigs. 799 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 800 mNetworksDefined++; // used only in the log() statement below. 801 } 802 803 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 804 805 mProtectedNetworks = new ArrayList<Integer>(); 806 int[] protectedNetworks = context.getResources().getIntArray( 807 com.android.internal.R.array.config_protectedNetworks); 808 for (int p : protectedNetworks) { 809 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 810 mProtectedNetworks.add(p); 811 } else { 812 if (DBG) loge("Ignoring protectedNetwork " + p); 813 } 814 } 815 816 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 817 && SystemProperties.get("ro.build.type").equals("eng"); 818 819 mTethering = new Tethering(mContext, mNetd, statsService); 820 821 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 822 823 //set up the listener for user state for creating user VPNs 824 IntentFilter intentFilter = new IntentFilter(); 825 intentFilter.addAction(Intent.ACTION_USER_STARTED); 826 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 827 intentFilter.addAction(Intent.ACTION_USER_ADDED); 828 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 829 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 830 mContext.registerReceiverAsUser( 831 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 832 833 try { 834 mNetd.registerObserver(mTethering); 835 mNetd.registerObserver(mDataActivityObserver); 836 } catch (RemoteException e) { 837 loge("Error registering observer :" + e); 838 } 839 840 if (DBG) { 841 mInetLog = new ArrayList(); 842 } 843 844 mSettingsObserver = new SettingsObserver(mContext, mHandler); 845 registerSettingsCallbacks(); 846 847 mDataConnectionStats = new DataConnectionStats(mContext); 848 mDataConnectionStats.startMonitoring(); 849 850 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 851 852 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 853 854 mKeepaliveTracker = new KeepaliveTracker(mHandler); 855 mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager, 856 mContext.getSystemService(NotificationManager.class)); 857 858 final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(), 859 Settings.Global.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT, 860 LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT); 861 final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(), 862 Settings.Global.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS, 863 LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS); 864 mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit); 865 866 intentFilter = new IntentFilter(); 867 intentFilter.addAction(Intent.ACTION_CONFIGURATION_CHANGED); 868 mContext.registerReceiverAsUser(new BroadcastReceiver() { 869 public void onReceive(Context context, Intent intent) { 870 mHandler.sendEmptyMessage(EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI); 871 } 872 }, UserHandle.ALL, intentFilter, null, null); 873 updateAvoidBadWifi(); 874 } 875 876 private NetworkRequest createInternetRequestForTransport( 877 int transportType, NetworkRequest.Type type) { 878 NetworkCapabilities netCap = new NetworkCapabilities(); 879 netCap.addCapability(NET_CAPABILITY_INTERNET); 880 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 881 if (transportType > -1) { 882 netCap.addTransportType(transportType); 883 } 884 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type); 885 } 886 887 // Used only for testing. 888 // TODO: Delete this and either: 889 // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires 890 // changing ContentResolver to make registerContentObserver non-final). 891 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 892 // by subclassing SettingsObserver. 893 @VisibleForTesting 894 void updateMobileDataAlwaysOn() { 895 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 896 } 897 898 private void handleMobileDataAlwaysOn() { 899 final boolean enable = (Settings.Global.getInt( 900 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 901 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 902 if (enable == isEnabled) { 903 return; // Nothing to do. 904 } 905 906 if (enable) { 907 handleRegisterNetworkRequest(new NetworkRequestInfo( 908 null, mDefaultMobileDataRequest, new Binder())); 909 } else { 910 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 911 } 912 } 913 914 private void registerSettingsCallbacks() { 915 // Watch for global HTTP proxy changes. 916 mSettingsObserver.observe( 917 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 918 EVENT_APPLY_GLOBAL_HTTP_PROXY); 919 920 // Watch for whether or not to keep mobile data always on. 921 mSettingsObserver.observe( 922 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 923 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 924 925 // Watch for whether to automatically switch away from wifi networks that lose Internet 926 // access. 927 mSettingsObserver.observe( 928 Settings.Global.getUriFor(Settings.Global.NETWORK_AVOID_BAD_WIFI), 929 EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI); 930 } 931 932 private synchronized int nextNetworkRequestId() { 933 return mNextNetworkRequestId++; 934 } 935 936 @VisibleForTesting 937 protected int reserveNetId() { 938 synchronized (mNetworkForNetId) { 939 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 940 int netId = mNextNetId; 941 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 942 // Make sure NetID unused. http://b/16815182 943 if (!mNetIdInUse.get(netId)) { 944 mNetIdInUse.put(netId, true); 945 return netId; 946 } 947 } 948 } 949 throw new IllegalStateException("No free netIds"); 950 } 951 952 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 953 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 954 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 955 final NetworkState state; 956 if (nai != null) { 957 state = nai.getNetworkState(); 958 state.networkInfo.setType(networkType); 959 } else { 960 final NetworkInfo info = new NetworkInfo(networkType, 0, 961 getNetworkTypeName(networkType), ""); 962 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 963 info.setIsAvailable(true); 964 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 965 null, null, null); 966 } 967 filterNetworkStateForUid(state, uid, ignoreBlocked); 968 return state; 969 } else { 970 return NetworkState.EMPTY; 971 } 972 } 973 974 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 975 if (network == null) { 976 return null; 977 } 978 synchronized (mNetworkForNetId) { 979 return mNetworkForNetId.get(network.netId); 980 } 981 } 982 983 private Network[] getVpnUnderlyingNetworks(int uid) { 984 if (!mLockdownEnabled) { 985 int user = UserHandle.getUserId(uid); 986 synchronized (mVpns) { 987 Vpn vpn = mVpns.get(user); 988 if (vpn != null && vpn.appliesToUid(uid)) { 989 return vpn.getUnderlyingNetworks(); 990 } 991 } 992 } 993 return null; 994 } 995 996 private NetworkState getUnfilteredActiveNetworkState(int uid) { 997 NetworkAgentInfo nai = getDefaultNetwork(); 998 999 final Network[] networks = getVpnUnderlyingNetworks(uid); 1000 if (networks != null) { 1001 // getUnderlyingNetworks() returns: 1002 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 1003 // empty array => the VPN explicitly said "no default network". 1004 // non-empty array => the VPN specified one or more default networks; we use the 1005 // first one. 1006 if (networks.length > 0) { 1007 nai = getNetworkAgentInfoForNetwork(networks[0]); 1008 } else { 1009 nai = null; 1010 } 1011 } 1012 1013 if (nai != null) { 1014 return nai.getNetworkState(); 1015 } else { 1016 return NetworkState.EMPTY; 1017 } 1018 } 1019 1020 /** 1021 * Check if UID should be blocked from using the network with the given LinkProperties. 1022 */ 1023 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 1024 boolean ignoreBlocked) { 1025 // Networks aren't blocked when ignoring blocked status 1026 if (ignoreBlocked) return false; 1027 // Networks are never blocked for system services 1028 if (isSystem(uid)) return false; 1029 1030 final boolean networkMetered; 1031 final int uidRules; 1032 1033 synchronized (mVpns) { 1034 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 1035 if (vpn != null && vpn.isBlockingUid(uid)) { 1036 return true; 1037 } 1038 } 1039 1040 final String iface = (lp == null ? "" : lp.getInterfaceName()); 1041 synchronized (mRulesLock) { 1042 networkMetered = mMeteredIfaces.contains(iface); 1043 uidRules = mUidRules.get(uid, RULE_NONE); 1044 } 1045 1046 boolean allowed = true; 1047 // Check Data Saver Mode first... 1048 if (networkMetered) { 1049 if ((uidRules & RULE_REJECT_METERED) != 0) { 1050 if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); 1051 // Explicitly blacklisted. 1052 allowed = false; 1053 } else { 1054 allowed = !mRestrictBackground 1055 || (uidRules & RULE_ALLOW_METERED) != 0 1056 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; 1057 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1058 + " mRestrictBackground=" + mRestrictBackground 1059 + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) 1060 + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" 1061 + ": " + allowed); 1062 } 1063 } 1064 // ...then power restrictions. 1065 if (allowed) { 1066 allowed = (uidRules & RULE_REJECT_ALL) == 0; 1067 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1068 + " rule is " + uidRulesToString(uidRules) + ": " + allowed); 1069 } 1070 return !allowed; 1071 } 1072 1073 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1074 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1075 return; 1076 } 1077 boolean removed = false; 1078 boolean added = false; 1079 synchronized (mBlockedAppUids) { 1080 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1081 added = true; 1082 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1083 removed = true; 1084 } 1085 } 1086 if (added) { 1087 log("Returning blocked NetworkInfo to uid=" + uid); 1088 mNetworkInfoBlockingLogs.log("BLOCKED " + uid); 1089 } else if (removed) { 1090 log("Returning unblocked NetworkInfo to uid=" + uid); 1091 mNetworkInfoBlockingLogs.log("UNBLOCKED " + uid); 1092 } 1093 } 1094 1095 /** 1096 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1097 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1098 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 1099 * {@link NetworkInfo#isMetered()} based on network policies. 1100 */ 1101 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1102 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1103 1104 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1105 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1106 } 1107 if (mLockdownTracker != null) { 1108 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1109 } 1110 1111 // TODO: apply metered state closer to NetworkAgentInfo 1112 final long token = Binder.clearCallingIdentity(); 1113 try { 1114 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 1115 } catch (RemoteException e) { 1116 } finally { 1117 Binder.restoreCallingIdentity(token); 1118 } 1119 } 1120 1121 /** 1122 * Return NetworkInfo for the active (i.e., connected) network interface. 1123 * It is assumed that at most one network is active at a time. If more 1124 * than one is active, it is indeterminate which will be returned. 1125 * @return the info for the active network, or {@code null} if none is 1126 * active 1127 */ 1128 @Override 1129 public NetworkInfo getActiveNetworkInfo() { 1130 enforceAccessPermission(); 1131 final int uid = Binder.getCallingUid(); 1132 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1133 filterNetworkStateForUid(state, uid, false); 1134 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1135 return state.networkInfo; 1136 } 1137 1138 @Override 1139 public Network getActiveNetwork() { 1140 enforceAccessPermission(); 1141 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1142 } 1143 1144 @Override 1145 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1146 enforceConnectivityInternalPermission(); 1147 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1148 } 1149 1150 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1151 final int user = UserHandle.getUserId(uid); 1152 int vpnNetId = NETID_UNSET; 1153 synchronized (mVpns) { 1154 final Vpn vpn = mVpns.get(user); 1155 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1156 } 1157 NetworkAgentInfo nai; 1158 if (vpnNetId != NETID_UNSET) { 1159 synchronized (mNetworkForNetId) { 1160 nai = mNetworkForNetId.get(vpnNetId); 1161 } 1162 if (nai != null) return nai.network; 1163 } 1164 nai = getDefaultNetwork(); 1165 if (nai != null 1166 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1167 nai = null; 1168 } 1169 return nai != null ? nai.network : null; 1170 } 1171 1172 // Public because it's used by mLockdownTracker. 1173 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1174 enforceAccessPermission(); 1175 final int uid = Binder.getCallingUid(); 1176 NetworkState state = getUnfilteredActiveNetworkState(uid); 1177 return state.networkInfo; 1178 } 1179 1180 @Override 1181 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1182 enforceConnectivityInternalPermission(); 1183 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1184 filterNetworkStateForUid(state, uid, ignoreBlocked); 1185 return state.networkInfo; 1186 } 1187 1188 @Override 1189 public NetworkInfo getNetworkInfo(int networkType) { 1190 enforceAccessPermission(); 1191 final int uid = Binder.getCallingUid(); 1192 if (getVpnUnderlyingNetworks(uid) != null) { 1193 // A VPN is active, so we may need to return one of its underlying networks. This 1194 // information is not available in LegacyTypeTracker, so we have to get it from 1195 // getUnfilteredActiveNetworkState. 1196 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1197 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1198 filterNetworkStateForUid(state, uid, false); 1199 return state.networkInfo; 1200 } 1201 } 1202 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1203 return state.networkInfo; 1204 } 1205 1206 @Override 1207 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1208 enforceAccessPermission(); 1209 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1210 if (nai != null) { 1211 final NetworkState state = nai.getNetworkState(); 1212 filterNetworkStateForUid(state, uid, ignoreBlocked); 1213 return state.networkInfo; 1214 } else { 1215 return null; 1216 } 1217 } 1218 1219 @Override 1220 public NetworkInfo[] getAllNetworkInfo() { 1221 enforceAccessPermission(); 1222 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1223 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1224 networkType++) { 1225 NetworkInfo info = getNetworkInfo(networkType); 1226 if (info != null) { 1227 result.add(info); 1228 } 1229 } 1230 return result.toArray(new NetworkInfo[result.size()]); 1231 } 1232 1233 @Override 1234 public Network getNetworkForType(int networkType) { 1235 enforceAccessPermission(); 1236 final int uid = Binder.getCallingUid(); 1237 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1238 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1239 return state.network; 1240 } 1241 return null; 1242 } 1243 1244 @Override 1245 public Network[] getAllNetworks() { 1246 enforceAccessPermission(); 1247 synchronized (mNetworkForNetId) { 1248 final Network[] result = new Network[mNetworkForNetId.size()]; 1249 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1250 result[i] = mNetworkForNetId.valueAt(i).network; 1251 } 1252 return result; 1253 } 1254 } 1255 1256 @Override 1257 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1258 // The basic principle is: if an app's traffic could possibly go over a 1259 // network, without the app doing anything multinetwork-specific, 1260 // (hence, by "default"), then include that network's capabilities in 1261 // the array. 1262 // 1263 // In the normal case, app traffic only goes over the system's default 1264 // network connection, so that's the only network returned. 1265 // 1266 // With a VPN in force, some app traffic may go into the VPN, and thus 1267 // over whatever underlying networks the VPN specifies, while other app 1268 // traffic may go over the system default network (e.g.: a split-tunnel 1269 // VPN, or an app disallowed by the VPN), so the set of networks 1270 // returned includes the VPN's underlying networks and the system 1271 // default. 1272 enforceAccessPermission(); 1273 1274 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1275 1276 NetworkAgentInfo nai = getDefaultNetwork(); 1277 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1278 if (nc != null) { 1279 result.put(nai.network, nc); 1280 } 1281 1282 if (!mLockdownEnabled) { 1283 synchronized (mVpns) { 1284 Vpn vpn = mVpns.get(userId); 1285 if (vpn != null) { 1286 Network[] networks = vpn.getUnderlyingNetworks(); 1287 if (networks != null) { 1288 for (Network network : networks) { 1289 nai = getNetworkAgentInfoForNetwork(network); 1290 nc = getNetworkCapabilitiesInternal(nai); 1291 if (nc != null) { 1292 result.put(network, nc); 1293 } 1294 } 1295 } 1296 } 1297 } 1298 } 1299 1300 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1301 out = result.values().toArray(out); 1302 return out; 1303 } 1304 1305 @Override 1306 public boolean isNetworkSupported(int networkType) { 1307 enforceAccessPermission(); 1308 return mLegacyTypeTracker.isTypeSupported(networkType); 1309 } 1310 1311 /** 1312 * Return LinkProperties for the active (i.e., connected) default 1313 * network interface. It is assumed that at most one default network 1314 * is active at a time. If more than one is active, it is indeterminate 1315 * which will be returned. 1316 * @return the ip properties for the active network, or {@code null} if 1317 * none is active 1318 */ 1319 @Override 1320 public LinkProperties getActiveLinkProperties() { 1321 enforceAccessPermission(); 1322 final int uid = Binder.getCallingUid(); 1323 NetworkState state = getUnfilteredActiveNetworkState(uid); 1324 return state.linkProperties; 1325 } 1326 1327 @Override 1328 public LinkProperties getLinkPropertiesForType(int networkType) { 1329 enforceAccessPermission(); 1330 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1331 if (nai != null) { 1332 synchronized (nai) { 1333 return new LinkProperties(nai.linkProperties); 1334 } 1335 } 1336 return null; 1337 } 1338 1339 // TODO - this should be ALL networks 1340 @Override 1341 public LinkProperties getLinkProperties(Network network) { 1342 enforceAccessPermission(); 1343 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1344 if (nai != null) { 1345 synchronized (nai) { 1346 return new LinkProperties(nai.linkProperties); 1347 } 1348 } 1349 return null; 1350 } 1351 1352 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1353 if (nai != null) { 1354 synchronized (nai) { 1355 if (nai.networkCapabilities != null) { 1356 return new NetworkCapabilities(nai.networkCapabilities); 1357 } 1358 } 1359 } 1360 return null; 1361 } 1362 1363 @Override 1364 public NetworkCapabilities getNetworkCapabilities(Network network) { 1365 enforceAccessPermission(); 1366 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1367 } 1368 1369 @Override 1370 public NetworkState[] getAllNetworkState() { 1371 // Require internal since we're handing out IMSI details 1372 enforceConnectivityInternalPermission(); 1373 1374 final ArrayList<NetworkState> result = Lists.newArrayList(); 1375 for (Network network : getAllNetworks()) { 1376 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1377 if (nai != null) { 1378 result.add(nai.getNetworkState()); 1379 } 1380 } 1381 return result.toArray(new NetworkState[result.size()]); 1382 } 1383 1384 @Override 1385 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1386 enforceAccessPermission(); 1387 final int uid = Binder.getCallingUid(); 1388 final long token = Binder.clearCallingIdentity(); 1389 try { 1390 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1391 if (state.networkInfo != null) { 1392 try { 1393 return mPolicyManager.getNetworkQuotaInfo(state); 1394 } catch (RemoteException e) { 1395 } 1396 } 1397 return null; 1398 } finally { 1399 Binder.restoreCallingIdentity(token); 1400 } 1401 } 1402 1403 @Override 1404 public boolean isActiveNetworkMetered() { 1405 enforceAccessPermission(); 1406 1407 final NetworkInfo info = getActiveNetworkInfo(); 1408 return (info != null) ? info.isMetered() : false; 1409 } 1410 1411 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1412 @Override 1413 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1414 int deviceType = Integer.parseInt(label); 1415 sendDataActivityBroadcast(deviceType, active, tsNanos); 1416 } 1417 }; 1418 1419 /** 1420 * Ensure that a network route exists to deliver traffic to the specified 1421 * host via the specified network interface. 1422 * @param networkType the type of the network over which traffic to the 1423 * specified host is to be routed 1424 * @param hostAddress the IP address of the host to which the route is 1425 * desired 1426 * @return {@code true} on success, {@code false} on failure 1427 */ 1428 @Override 1429 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1430 enforceChangePermission(); 1431 if (mProtectedNetworks.contains(networkType)) { 1432 enforceConnectivityInternalPermission(); 1433 } 1434 1435 InetAddress addr; 1436 try { 1437 addr = InetAddress.getByAddress(hostAddress); 1438 } catch (UnknownHostException e) { 1439 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1440 return false; 1441 } 1442 1443 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1444 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1445 return false; 1446 } 1447 1448 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1449 if (nai == null) { 1450 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1451 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1452 } else { 1453 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1454 } 1455 return false; 1456 } 1457 1458 DetailedState netState; 1459 synchronized (nai) { 1460 netState = nai.networkInfo.getDetailedState(); 1461 } 1462 1463 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1464 if (VDBG) { 1465 log("requestRouteToHostAddress on down network " 1466 + "(" + networkType + ") - dropped" 1467 + " netState=" + netState); 1468 } 1469 return false; 1470 } 1471 1472 final int uid = Binder.getCallingUid(); 1473 final long token = Binder.clearCallingIdentity(); 1474 try { 1475 LinkProperties lp; 1476 int netId; 1477 synchronized (nai) { 1478 lp = nai.linkProperties; 1479 netId = nai.network.netId; 1480 } 1481 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1482 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1483 return ok; 1484 } finally { 1485 Binder.restoreCallingIdentity(token); 1486 } 1487 } 1488 1489 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1490 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1491 if (bestRoute == null) { 1492 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1493 } else { 1494 String iface = bestRoute.getInterface(); 1495 if (bestRoute.getGateway().equals(addr)) { 1496 // if there is no better route, add the implied hostroute for our gateway 1497 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1498 } else { 1499 // if we will connect to this through another route, add a direct route 1500 // to it's gateway 1501 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1502 } 1503 } 1504 if (DBG) log("Adding legacy route " + bestRoute + 1505 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1506 try { 1507 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1508 } catch (Exception e) { 1509 // never crash - catch them all 1510 if (DBG) loge("Exception trying to add a route: " + e); 1511 return false; 1512 } 1513 return true; 1514 } 1515 1516 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1517 @Override 1518 public void onUidRulesChanged(int uid, int uidRules) { 1519 // caller is NPMS, since we only register with them 1520 if (LOGD_RULES) { 1521 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1522 } 1523 1524 synchronized (mRulesLock) { 1525 // skip update when we've already applied rules 1526 final int oldRules = mUidRules.get(uid, RULE_NONE); 1527 if (oldRules == uidRules) return; 1528 1529 if (uidRules == RULE_NONE) { 1530 mUidRules.delete(uid); 1531 } else { 1532 mUidRules.put(uid, uidRules); 1533 } 1534 } 1535 1536 // TODO: notify UID when it has requested targeted updates 1537 } 1538 1539 @Override 1540 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1541 // caller is NPMS, since we only register with them 1542 if (LOGD_RULES) { 1543 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1544 } 1545 1546 synchronized (mRulesLock) { 1547 mMeteredIfaces.clear(); 1548 for (String iface : meteredIfaces) { 1549 mMeteredIfaces.add(iface); 1550 } 1551 } 1552 } 1553 1554 @Override 1555 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1556 // caller is NPMS, since we only register with them 1557 if (LOGD_RULES) { 1558 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1559 } 1560 1561 synchronized (mRulesLock) { 1562 mRestrictBackground = restrictBackground; 1563 } 1564 1565 if (restrictBackground) { 1566 log("onRestrictBackgroundChanged(true): disabling tethering"); 1567 mTethering.untetherAll(); 1568 } 1569 } 1570 1571 @Override 1572 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1573 if (LOGD_RULES) { 1574 // caller is NPMS, since we only register with them 1575 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1576 + whitelisted + ")"); 1577 } 1578 } 1579 @Override 1580 public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { 1581 if (LOGD_RULES) { 1582 // caller is NPMS, since we only register with them 1583 log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" 1584 + blacklisted + ")"); 1585 } 1586 } 1587 }; 1588 1589 /** 1590 * Require that the caller is either in the same user or has appropriate permission to interact 1591 * across users. 1592 * 1593 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1594 */ 1595 private void enforceCrossUserPermission(int userId) { 1596 if (userId == UserHandle.getCallingUserId()) { 1597 // Not a cross-user call. 1598 return; 1599 } 1600 mContext.enforceCallingOrSelfPermission( 1601 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1602 "ConnectivityService"); 1603 } 1604 1605 private void enforceInternetPermission() { 1606 mContext.enforceCallingOrSelfPermission( 1607 android.Manifest.permission.INTERNET, 1608 "ConnectivityService"); 1609 } 1610 1611 private void enforceAccessPermission() { 1612 mContext.enforceCallingOrSelfPermission( 1613 android.Manifest.permission.ACCESS_NETWORK_STATE, 1614 "ConnectivityService"); 1615 } 1616 1617 private void enforceChangePermission() { 1618 ConnectivityManager.enforceChangePermission(mContext); 1619 } 1620 1621 private void enforceTetherAccessPermission() { 1622 mContext.enforceCallingOrSelfPermission( 1623 android.Manifest.permission.ACCESS_NETWORK_STATE, 1624 "ConnectivityService"); 1625 } 1626 1627 private void enforceConnectivityInternalPermission() { 1628 mContext.enforceCallingOrSelfPermission( 1629 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1630 "ConnectivityService"); 1631 } 1632 1633 private void enforceConnectivityRestrictedNetworksPermission() { 1634 try { 1635 mContext.enforceCallingOrSelfPermission( 1636 android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, 1637 "ConnectivityService"); 1638 return; 1639 } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } 1640 enforceConnectivityInternalPermission(); 1641 } 1642 1643 private void enforceKeepalivePermission() { 1644 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1645 } 1646 1647 // Public because it's used by mLockdownTracker. 1648 public void sendConnectedBroadcast(NetworkInfo info) { 1649 enforceConnectivityInternalPermission(); 1650 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1651 } 1652 1653 private void sendInetConditionBroadcast(NetworkInfo info) { 1654 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1655 } 1656 1657 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1658 if (mLockdownTracker != null) { 1659 info = new NetworkInfo(info); 1660 mLockdownTracker.augmentNetworkInfo(info); 1661 } 1662 1663 Intent intent = new Intent(bcastType); 1664 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1665 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1666 if (info.isFailover()) { 1667 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1668 info.setFailover(false); 1669 } 1670 if (info.getReason() != null) { 1671 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1672 } 1673 if (info.getExtraInfo() != null) { 1674 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1675 info.getExtraInfo()); 1676 } 1677 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1678 return intent; 1679 } 1680 1681 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1682 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1683 } 1684 1685 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1686 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1687 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1688 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1689 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1690 final long ident = Binder.clearCallingIdentity(); 1691 try { 1692 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1693 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1694 } finally { 1695 Binder.restoreCallingIdentity(ident); 1696 } 1697 } 1698 1699 private void sendStickyBroadcast(Intent intent) { 1700 synchronized(this) { 1701 if (!mSystemReady) { 1702 mInitialBroadcast = new Intent(intent); 1703 } 1704 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1705 if (VDBG) { 1706 log("sendStickyBroadcast: action=" + intent.getAction()); 1707 } 1708 1709 Bundle options = null; 1710 final long ident = Binder.clearCallingIdentity(); 1711 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1712 final NetworkInfo ni = intent.getParcelableExtra( 1713 ConnectivityManager.EXTRA_NETWORK_INFO); 1714 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1715 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1716 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1717 } else { 1718 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1719 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1720 options = opts.toBundle(); 1721 } 1722 final IBatteryStats bs = BatteryStatsService.getService(); 1723 try { 1724 bs.noteConnectivityChanged(intent.getIntExtra( 1725 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1726 ni != null ? ni.getState().toString() : "?"); 1727 } catch (RemoteException e) { 1728 } 1729 } 1730 try { 1731 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1732 } finally { 1733 Binder.restoreCallingIdentity(ident); 1734 } 1735 } 1736 } 1737 1738 void systemReady() { 1739 loadGlobalProxy(); 1740 1741 synchronized(this) { 1742 mSystemReady = true; 1743 if (mInitialBroadcast != null) { 1744 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1745 mInitialBroadcast = null; 1746 } 1747 } 1748 // load the global proxy at startup 1749 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1750 1751 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1752 // for user to unlock device too. 1753 updateLockdownVpn(); 1754 1755 // Configure whether mobile data is always on. 1756 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1757 1758 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1759 1760 mPermissionMonitor.startMonitoring(); 1761 } 1762 1763 /** 1764 * Setup data activity tracking for the given network. 1765 * 1766 * Every {@code setupDataActivityTracking} should be paired with a 1767 * {@link #removeDataActivityTracking} for cleanup. 1768 */ 1769 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1770 final String iface = networkAgent.linkProperties.getInterfaceName(); 1771 1772 final int timeout; 1773 int type = ConnectivityManager.TYPE_NONE; 1774 1775 if (networkAgent.networkCapabilities.hasTransport( 1776 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1777 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1778 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1779 10); 1780 type = ConnectivityManager.TYPE_MOBILE; 1781 } else if (networkAgent.networkCapabilities.hasTransport( 1782 NetworkCapabilities.TRANSPORT_WIFI)) { 1783 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1784 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1785 15); 1786 type = ConnectivityManager.TYPE_WIFI; 1787 } else { 1788 // do not track any other networks 1789 timeout = 0; 1790 } 1791 1792 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1793 try { 1794 mNetd.addIdleTimer(iface, timeout, type); 1795 } catch (Exception e) { 1796 // You shall not crash! 1797 loge("Exception in setupDataActivityTracking " + e); 1798 } 1799 } 1800 } 1801 1802 /** 1803 * Remove data activity tracking when network disconnects. 1804 */ 1805 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1806 final String iface = networkAgent.linkProperties.getInterfaceName(); 1807 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1808 1809 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1810 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1811 try { 1812 // the call fails silently if no idletimer setup for this interface 1813 mNetd.removeIdleTimer(iface); 1814 } catch (Exception e) { 1815 loge("Exception in removeDataActivityTracking " + e); 1816 } 1817 } 1818 } 1819 1820 /** 1821 * Reads the network specific MTU size from reources. 1822 * and set it on it's iface. 1823 */ 1824 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1825 final String iface = newLp.getInterfaceName(); 1826 final int mtu = newLp.getMtu(); 1827 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1828 if (VDBG) log("identical MTU - not setting"); 1829 return; 1830 } 1831 1832 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1833 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1834 return; 1835 } 1836 1837 // Cannot set MTU without interface name 1838 if (TextUtils.isEmpty(iface)) { 1839 loge("Setting MTU size with null iface."); 1840 return; 1841 } 1842 1843 try { 1844 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1845 mNetd.setMtu(iface, mtu); 1846 } catch (Exception e) { 1847 Slog.e(TAG, "exception in setMtu()" + e); 1848 } 1849 } 1850 1851 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1852 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1853 1854 // Overridden for testing purposes to avoid writing to SystemProperties. 1855 @VisibleForTesting 1856 protected int getDefaultTcpRwnd() { 1857 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1858 } 1859 1860 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1861 if (isDefaultNetwork(nai) == false) { 1862 return; 1863 } 1864 1865 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1866 String[] values = null; 1867 if (tcpBufferSizes != null) { 1868 values = tcpBufferSizes.split(","); 1869 } 1870 1871 if (values == null || values.length != 6) { 1872 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1873 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1874 values = tcpBufferSizes.split(","); 1875 } 1876 1877 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1878 1879 try { 1880 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1881 1882 final String prefix = "/sys/kernel/ipv4/tcp_"; 1883 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1884 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1885 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1886 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1887 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1888 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1889 mCurrentTcpBufferSizes = tcpBufferSizes; 1890 } catch (IOException e) { 1891 loge("Can't set TCP buffer sizes:" + e); 1892 } 1893 1894 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1895 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1896 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1897 if (rwndValue != 0) { 1898 SystemProperties.set(sysctlKey, rwndValue.toString()); 1899 } 1900 } 1901 1902 private void flushVmDnsCache() { 1903 /* 1904 * Tell the VMs to toss their DNS caches 1905 */ 1906 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1907 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1908 /* 1909 * Connectivity events can happen before boot has completed ... 1910 */ 1911 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1912 final long ident = Binder.clearCallingIdentity(); 1913 try { 1914 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1915 } finally { 1916 Binder.restoreCallingIdentity(ident); 1917 } 1918 } 1919 1920 @Override 1921 public int getRestoreDefaultNetworkDelay(int networkType) { 1922 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1923 NETWORK_RESTORE_DELAY_PROP_NAME); 1924 if(restoreDefaultNetworkDelayStr != null && 1925 restoreDefaultNetworkDelayStr.length() != 0) { 1926 try { 1927 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1928 } catch (NumberFormatException e) { 1929 } 1930 } 1931 // if the system property isn't set, use the value for the apn type 1932 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1933 1934 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1935 (mNetConfigs[networkType] != null)) { 1936 ret = mNetConfigs[networkType].restoreTime; 1937 } 1938 return ret; 1939 } 1940 1941 private boolean argsContain(String[] args, String target) { 1942 for (String arg : args) { 1943 if (arg.equals(target)) return true; 1944 } 1945 return false; 1946 } 1947 1948 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1949 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1950 final long DIAG_TIME_MS = 5000; 1951 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1952 // Start gathering diagnostic information. 1953 netDiags.add(new NetworkDiagnostics( 1954 nai.network, 1955 new LinkProperties(nai.linkProperties), // Must be a copy. 1956 DIAG_TIME_MS)); 1957 } 1958 1959 for (NetworkDiagnostics netDiag : netDiags) { 1960 pw.println(); 1961 netDiag.waitForMeasurements(); 1962 netDiag.dump(pw); 1963 } 1964 } 1965 1966 @Override 1967 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1968 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1969 if (mContext.checkCallingOrSelfPermission( 1970 android.Manifest.permission.DUMP) 1971 != PackageManager.PERMISSION_GRANTED) { 1972 pw.println("Permission Denial: can't dump ConnectivityService " + 1973 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1974 Binder.getCallingUid()); 1975 return; 1976 } 1977 1978 if (argsContain(args, "--diag")) { 1979 dumpNetworkDiagnostics(pw); 1980 return; 1981 } 1982 1983 pw.print("NetworkFactories for:"); 1984 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1985 pw.print(" " + nfi.name); 1986 } 1987 pw.println(); 1988 pw.println(); 1989 1990 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1991 pw.print("Active default network: "); 1992 if (defaultNai == null) { 1993 pw.println("none"); 1994 } else { 1995 pw.println(defaultNai.network.netId); 1996 } 1997 pw.println(); 1998 1999 pw.println("Current Networks:"); 2000 pw.increaseIndent(); 2001 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2002 pw.println(nai.toString()); 2003 pw.increaseIndent(); 2004 pw.println(String.format( 2005 "Requests: REQUEST:%d LISTEN:%d BACKGROUND_REQUEST:%d total:%d", 2006 nai.numForegroundNetworkRequests(), 2007 nai.numNetworkRequests() - nai.numRequestNetworkRequests(), 2008 nai.numBackgroundNetworkRequests(), 2009 nai.numNetworkRequests())); 2010 pw.increaseIndent(); 2011 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2012 pw.println(nai.requestAt(i).toString()); 2013 } 2014 pw.decreaseIndent(); 2015 pw.println("Lingered:"); 2016 pw.increaseIndent(); 2017 nai.dumpLingerTimers(pw); 2018 pw.decreaseIndent(); 2019 pw.decreaseIndent(); 2020 } 2021 pw.decreaseIndent(); 2022 pw.println(); 2023 2024 pw.println("Metered Interfaces:"); 2025 pw.increaseIndent(); 2026 for (String value : mMeteredIfaces) { 2027 pw.println(value); 2028 } 2029 pw.decreaseIndent(); 2030 pw.println(); 2031 2032 pw.print("Restrict background: "); 2033 pw.println(mRestrictBackground); 2034 pw.println(); 2035 2036 pw.println("Status for known UIDs:"); 2037 pw.increaseIndent(); 2038 final int size = mUidRules.size(); 2039 for (int i = 0; i < size; i++) { 2040 final int uid = mUidRules.keyAt(i); 2041 pw.print("UID="); 2042 pw.print(uid); 2043 final int uidRules = mUidRules.get(uid, RULE_NONE); 2044 pw.print(" rules="); 2045 pw.print(uidRulesToString(uidRules)); 2046 pw.println(); 2047 } 2048 pw.println(); 2049 pw.decreaseIndent(); 2050 2051 pw.println("Network Requests:"); 2052 pw.increaseIndent(); 2053 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2054 pw.println(nri.toString()); 2055 } 2056 pw.println(); 2057 pw.decreaseIndent(); 2058 2059 mLegacyTypeTracker.dump(pw); 2060 2061 synchronized (this) { 2062 pw.print("mNetTransitionWakeLock: currently " + 2063 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 2064 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 2065 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 2066 } else { 2067 pw.println(", last requested never"); 2068 } 2069 } 2070 2071 pw.println(); 2072 mTethering.dump(fd, pw, args); 2073 2074 pw.println(); 2075 mKeepaliveTracker.dump(pw); 2076 2077 pw.println(); 2078 dumpAvoidBadWifiSettings(pw); 2079 2080 pw.println(); 2081 if (mInetLog != null && mInetLog.size() > 0) { 2082 pw.println(); 2083 pw.println("Inet condition reports:"); 2084 pw.increaseIndent(); 2085 for(int i = 0; i < mInetLog.size(); i++) { 2086 pw.println(mInetLog.get(i)); 2087 } 2088 pw.decreaseIndent(); 2089 } 2090 2091 if (argsContain(args, "--short") == false) { 2092 pw.println(); 2093 synchronized (mValidationLogs) { 2094 pw.println("mValidationLogs (most recent first):"); 2095 for (ValidationLog p : mValidationLogs) { 2096 pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); 2097 pw.increaseIndent(); 2098 p.mLog.dump(fd, pw, args); 2099 pw.decreaseIndent(); 2100 } 2101 } 2102 2103 pw.println(); 2104 pw.println("mNetworkRequestInfoLogs (most recent first):"); 2105 pw.increaseIndent(); 2106 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 2107 pw.decreaseIndent(); 2108 2109 pw.println(); 2110 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 2111 pw.increaseIndent(); 2112 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 2113 pw.decreaseIndent(); 2114 } 2115 } 2116 2117 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 2118 if (nai.network == null) return false; 2119 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 2120 if (officialNai != null && officialNai.equals(nai)) return true; 2121 if (officialNai != null || VDBG) { 2122 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 2123 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 2124 " - " + nai); 2125 } 2126 return false; 2127 } 2128 2129 // must be stateless - things change under us. 2130 private class NetworkStateTrackerHandler extends Handler { 2131 public NetworkStateTrackerHandler(Looper looper) { 2132 super(looper); 2133 } 2134 2135 private boolean maybeHandleAsyncChannelMessage(Message msg) { 2136 switch (msg.what) { 2137 default: 2138 return false; 2139 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2140 handleAsyncChannelHalfConnect(msg); 2141 break; 2142 } 2143 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2144 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2145 if (nai != null) nai.asyncChannel.disconnect(); 2146 break; 2147 } 2148 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2149 handleAsyncChannelDisconnected(msg); 2150 break; 2151 } 2152 } 2153 return true; 2154 } 2155 2156 private void maybeHandleNetworkAgentMessage(Message msg) { 2157 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2158 if (nai == null) { 2159 if (VDBG) { 2160 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 2161 log(String.format("%s from unknown NetworkAgent", what)); 2162 } 2163 return; 2164 } 2165 2166 switch (msg.what) { 2167 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2168 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2169 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2170 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED) || 2171 networkCapabilities.hasCapability(NET_CAPABILITY_FOREGROUND)) { 2172 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2173 } 2174 updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities); 2175 break; 2176 } 2177 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2178 if (VDBG) { 2179 log("Update of LinkProperties for " + nai.name() + 2180 "; created=" + nai.created + 2181 "; everConnected=" + nai.everConnected); 2182 } 2183 LinkProperties oldLp = nai.linkProperties; 2184 synchronized (nai) { 2185 nai.linkProperties = (LinkProperties)msg.obj; 2186 } 2187 if (nai.everConnected) updateLinkProperties(nai, oldLp); 2188 break; 2189 } 2190 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2191 NetworkInfo info = (NetworkInfo) msg.obj; 2192 updateNetworkInfo(nai, info); 2193 break; 2194 } 2195 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2196 Integer score = (Integer) msg.obj; 2197 if (score != null) updateNetworkScore(nai, score.intValue()); 2198 break; 2199 } 2200 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2201 try { 2202 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2203 } catch (Exception e) { 2204 // Never crash! 2205 loge("Exception in addVpnUidRanges: " + e); 2206 } 2207 break; 2208 } 2209 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2210 try { 2211 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2212 } catch (Exception e) { 2213 // Never crash! 2214 loge("Exception in removeVpnUidRanges: " + e); 2215 } 2216 break; 2217 } 2218 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2219 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2220 loge("ERROR: already-connected network explicitly selected."); 2221 } 2222 nai.networkMisc.explicitlySelected = true; 2223 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2224 break; 2225 } 2226 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2227 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2228 break; 2229 } 2230 } 2231 } 2232 2233 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2234 switch (msg.what) { 2235 default: 2236 return false; 2237 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2238 final NetworkAgentInfo nai; 2239 synchronized (mNetworkForNetId) { 2240 nai = mNetworkForNetId.get(msg.arg2); 2241 } 2242 if (nai != null) { 2243 final boolean valid = 2244 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2245 final boolean wasValidated = nai.lastValidated; 2246 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2247 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2248 if (valid != nai.lastValidated) { 2249 final int oldScore = nai.getCurrentScore(); 2250 nai.lastValidated = valid; 2251 nai.everValidated |= valid; 2252 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2253 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2254 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2255 } 2256 updateInetCondition(nai); 2257 // Let the NetworkAgent know the state of its network 2258 Bundle redirectUrlBundle = new Bundle(); 2259 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2260 nai.asyncChannel.sendMessage( 2261 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2262 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2263 0, redirectUrlBundle); 2264 if (wasValidated && !nai.lastValidated) { 2265 handleNetworkUnvalidated(nai); 2266 } 2267 } 2268 break; 2269 } 2270 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2271 final int netId = msg.arg2; 2272 final boolean visible = (msg.arg1 != 0); 2273 final NetworkAgentInfo nai; 2274 synchronized (mNetworkForNetId) { 2275 nai = mNetworkForNetId.get(netId); 2276 } 2277 // If captive portal status has changed, update capabilities. 2278 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2279 final int oldScore = nai.getCurrentScore(); 2280 nai.lastCaptivePortalDetected = visible; 2281 nai.everCaptivePortalDetected |= visible; 2282 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2283 } 2284 if (!visible) { 2285 mNotifier.clearNotification(netId); 2286 } else { 2287 if (nai == null) { 2288 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2289 break; 2290 } 2291 if (!nai.networkMisc.provisioningNotificationDisabled) { 2292 mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null, 2293 (PendingIntent) msg.obj, nai.networkMisc.explicitlySelected); 2294 } 2295 } 2296 break; 2297 } 2298 } 2299 return true; 2300 } 2301 2302 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2303 switch (msg.what) { 2304 default: 2305 return false; 2306 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2307 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2308 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2309 handleLingerComplete(nai); 2310 } 2311 break; 2312 } 2313 } 2314 return true; 2315 } 2316 2317 @Override 2318 public void handleMessage(Message msg) { 2319 if (!maybeHandleAsyncChannelMessage(msg) && 2320 !maybeHandleNetworkMonitorMessage(msg) && 2321 !maybeHandleNetworkAgentInfoMessage(msg)) { 2322 maybeHandleNetworkAgentMessage(msg); 2323 } 2324 } 2325 } 2326 2327 private void updateLingerState(NetworkAgentInfo nai, long now) { 2328 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2329 // 2. If the network was lingering and there are now requests, unlinger it. 2330 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2331 // one lingered request, start lingering. 2332 nai.updateLingerTimer(); 2333 if (nai.isLingering() && nai.numForegroundNetworkRequests() > 0) { 2334 if (DBG) log("Unlingering " + nai.name()); 2335 nai.unlinger(); 2336 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2337 } else if (unneeded(nai, UnneededFor.LINGER) && nai.getLingerExpiry() > 0) { 2338 int lingerTime = (int) (nai.getLingerExpiry() - now); 2339 if (DBG) log("Lingering " + nai.name() + " for " + lingerTime + "ms"); 2340 nai.linger(); 2341 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2342 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2343 } 2344 } 2345 2346 private void handleAsyncChannelHalfConnect(Message msg) { 2347 AsyncChannel ac = (AsyncChannel) msg.obj; 2348 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2349 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2350 if (VDBG) log("NetworkFactory connected"); 2351 // A network factory has connected. Send it all current NetworkRequests. 2352 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2353 if (nri.request.isListen()) continue; 2354 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2355 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2356 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2357 } 2358 } else { 2359 loge("Error connecting NetworkFactory"); 2360 mNetworkFactoryInfos.remove(msg.obj); 2361 } 2362 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2363 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2364 if (VDBG) log("NetworkAgent connected"); 2365 // A network agent has requested a connection. Establish the connection. 2366 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2367 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2368 } else { 2369 loge("Error connecting NetworkAgent"); 2370 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2371 if (nai != null) { 2372 final boolean wasDefault = isDefaultNetwork(nai); 2373 synchronized (mNetworkForNetId) { 2374 mNetworkForNetId.remove(nai.network.netId); 2375 mNetIdInUse.delete(nai.network.netId); 2376 } 2377 // Just in case. 2378 mLegacyTypeTracker.remove(nai, wasDefault); 2379 } 2380 } 2381 } 2382 } 2383 2384 private void handleAsyncChannelDisconnected(Message msg) { 2385 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2386 if (nai != null) { 2387 if (DBG) { 2388 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2389 } 2390 // A network agent has disconnected. 2391 // TODO - if we move the logic to the network agent (have them disconnect 2392 // because they lost all their requests or because their score isn't good) 2393 // then they would disconnect organically, report their new state and then 2394 // disconnect the channel. 2395 if (nai.networkInfo.isConnected()) { 2396 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2397 null, null); 2398 } 2399 final boolean wasDefault = isDefaultNetwork(nai); 2400 if (wasDefault) { 2401 mDefaultInetConditionPublished = 0; 2402 // Log default network disconnection before required book-keeping. 2403 // Let rematchAllNetworksAndRequests() below record a new default network event 2404 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2405 // whose timestamps tell how long it takes to recover a default network. 2406 logDefaultNetworkEvent(null, nai); 2407 } 2408 notifyIfacesChangedForNetworkStats(); 2409 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2410 // by other networks that are already connected. Perhaps that can be done by 2411 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2412 // of rematchAllNetworksAndRequests 2413 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2414 mKeepaliveTracker.handleStopAllKeepalives(nai, 2415 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2416 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2417 mNetworkAgentInfos.remove(msg.replyTo); 2418 updateClat(null, nai.linkProperties, nai); 2419 synchronized (mNetworkForNetId) { 2420 // Remove the NetworkAgent, but don't mark the netId as 2421 // available until we've told netd to delete it below. 2422 mNetworkForNetId.remove(nai.network.netId); 2423 } 2424 // Remove all previously satisfied requests. 2425 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2426 NetworkRequest request = nai.requestAt(i); 2427 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2428 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2429 mNetworkForRequestId.remove(request.requestId); 2430 sendUpdatedScoreToFactories(request, 0); 2431 } 2432 } 2433 nai.clearLingerState(); 2434 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2435 removeDataActivityTracking(nai); 2436 notifyLockdownVpn(nai); 2437 requestNetworkTransitionWakelock(nai.name()); 2438 } 2439 mLegacyTypeTracker.remove(nai, wasDefault); 2440 rematchAllNetworksAndRequests(null, 0); 2441 mLingerMonitor.noteDisconnect(nai); 2442 if (nai.created) { 2443 // Tell netd to clean up the configuration for this network 2444 // (routing rules, DNS, etc). 2445 // This may be slow as it requires a lot of netd shelling out to ip and 2446 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2447 // after we've rematched networks with requests which should make a potential 2448 // fallback network the default or requested a new network from the 2449 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2450 // long time. 2451 try { 2452 mNetd.removeNetwork(nai.network.netId); 2453 } catch (Exception e) { 2454 loge("Exception removing network: " + e); 2455 } 2456 } 2457 synchronized (mNetworkForNetId) { 2458 mNetIdInUse.delete(nai.network.netId); 2459 } 2460 } else { 2461 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2462 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2463 } 2464 } 2465 2466 // If this method proves to be too slow then we can maintain a separate 2467 // pendingIntent => NetworkRequestInfo map. 2468 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2469 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2470 Intent intent = pendingIntent.getIntent(); 2471 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2472 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2473 if (existingPendingIntent != null && 2474 existingPendingIntent.getIntent().filterEquals(intent)) { 2475 return entry.getValue(); 2476 } 2477 } 2478 return null; 2479 } 2480 2481 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2482 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2483 2484 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2485 if (existingRequest != null) { // remove the existing request. 2486 if (DBG) log("Replacing " + existingRequest.request + " with " 2487 + nri.request + " because their intents matched."); 2488 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2489 } 2490 handleRegisterNetworkRequest(nri); 2491 } 2492 2493 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2494 mNetworkRequests.put(nri.request, nri); 2495 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2496 if (nri.request.isListen()) { 2497 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2498 if (nri.request.networkCapabilities.hasSignalStrength() && 2499 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2500 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2501 } 2502 } 2503 } 2504 rematchAllNetworksAndRequests(null, 0); 2505 if (nri.request.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2506 sendUpdatedScoreToFactories(nri.request, 0); 2507 } 2508 } 2509 2510 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2511 int callingUid) { 2512 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2513 if (nri != null) { 2514 handleReleaseNetworkRequest(nri.request, callingUid); 2515 } 2516 } 2517 2518 // Determines whether the network is the best (or could become the best, if it validated), for 2519 // none of a particular type of NetworkRequests. The type of NetworkRequests considered depends 2520 // on the value of reason: 2521 // 2522 // - UnneededFor.TEARDOWN: non-listen NetworkRequests. If a network is unneeded for this reason, 2523 // then it should be torn down. 2524 // - UnneededFor.LINGER: foreground NetworkRequests. If a network is unneeded for this reason, 2525 // then it should be lingered. 2526 private boolean unneeded(NetworkAgentInfo nai, UnneededFor reason) { 2527 final int numRequests; 2528 switch (reason) { 2529 case TEARDOWN: 2530 numRequests = nai.numRequestNetworkRequests(); 2531 break; 2532 case LINGER: 2533 numRequests = nai.numForegroundNetworkRequests(); 2534 break; 2535 default: 2536 Slog.wtf(TAG, "Invalid reason. Cannot happen."); 2537 return true; 2538 } 2539 2540 if (!nai.everConnected || nai.isVPN() || nai.isLingering() || numRequests > 0) { 2541 return false; 2542 } 2543 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2544 if (reason == UnneededFor.LINGER && nri.request.isBackgroundRequest()) { 2545 // Background requests don't affect lingering. 2546 continue; 2547 } 2548 2549 // If this Network is already the highest scoring Network for a request, or if 2550 // there is hope for it to become one if it validated, then it is needed. 2551 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2552 (nai.isSatisfyingRequest(nri.request.requestId) || 2553 // Note that this catches two important cases: 2554 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2555 // is currently satisfying the request. This is desirable when 2556 // cellular ends up validating but WiFi does not. 2557 // 2. Unvalidated WiFi will not be reaped when validated cellular 2558 // is currently satisfying the request. This is desirable when 2559 // WiFi ends up validating and out scoring cellular. 2560 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2561 nai.getCurrentScoreAsValidated())) { 2562 return false; 2563 } 2564 } 2565 return true; 2566 } 2567 2568 private NetworkRequestInfo getNriForAppRequest( 2569 NetworkRequest request, int callingUid, String requestedOperation) { 2570 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2571 2572 if (nri != null) { 2573 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2574 log(String.format("UID %d attempted to %s for unowned request %s", 2575 callingUid, requestedOperation, nri)); 2576 return null; 2577 } 2578 } 2579 2580 return nri; 2581 } 2582 2583 private void handleRequestCallbackUpdate(NetworkRequest request, int callingUid, 2584 String description, int callbackType) { 2585 final NetworkRequestInfo nri = getNriForAppRequest(request, callingUid, description); 2586 if (nri == null) return; 2587 2588 final NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2589 // The network that is satisfying this request may have changed since 2590 // the application requested the update. 2591 // 2592 // - If the request is no longer satisfied, don't send any updates. 2593 // - If the request is satisfied by a different network, it is the 2594 // caller's responsibility to check that the Network object in the 2595 // callback matches the network that was returned in the last 2596 // onAvailable() callback for this request. 2597 if (nai == null) return; 2598 callCallbackForRequest(nri, nai, callbackType, 0); 2599 } 2600 2601 private void handleRequestLinkProperties(NetworkRequest request, int callingUid) { 2602 handleRequestCallbackUpdate(request, callingUid, 2603 "request LinkProperties", ConnectivityManager.CALLBACK_IP_CHANGED); 2604 } 2605 2606 private void handleRequestNetworkCapabilities(NetworkRequest request, int callingUid) { 2607 handleRequestCallbackUpdate(request, callingUid, 2608 "request NetworkCapabilities", ConnectivityManager.CALLBACK_CAP_CHANGED); 2609 } 2610 2611 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2612 final NetworkRequestInfo nri = getNriForAppRequest( 2613 request, callingUid, "release NetworkRequest"); 2614 if (nri == null) return; 2615 2616 if (VDBG || (DBG && nri.request.isRequest())) log("releasing " + request); 2617 nri.unlinkDeathRecipient(); 2618 mNetworkRequests.remove(request); 2619 synchronized (mUidToNetworkRequestCount) { 2620 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2621 if (requests < 1) { 2622 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2623 nri.mUid); 2624 } else if (requests == 1) { 2625 mUidToNetworkRequestCount.removeAt( 2626 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2627 } else { 2628 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2629 } 2630 } 2631 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2632 if (nri.request.isRequest()) { 2633 boolean wasKept = false; 2634 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2635 if (nai != null) { 2636 boolean wasBackgroundNetwork = nai.isBackgroundNetwork(); 2637 nai.removeRequest(nri.request.requestId); 2638 if (VDBG) { 2639 log(" Removing from current network " + nai.name() + 2640 ", leaving " + nai.numNetworkRequests() + " requests."); 2641 } 2642 // If there are still lingered requests on this network, don't tear it down, 2643 // but resume lingering instead. 2644 updateLingerState(nai, SystemClock.elapsedRealtime()); 2645 if (unneeded(nai, UnneededFor.TEARDOWN)) { 2646 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2647 teardownUnneededNetwork(nai); 2648 } else { 2649 wasKept = true; 2650 } 2651 mNetworkForRequestId.remove(nri.request.requestId); 2652 if (!wasBackgroundNetwork && nai.isBackgroundNetwork()) { 2653 // Went from foreground to background. 2654 updateCapabilities(nai.getCurrentScore(), nai, nai.networkCapabilities); 2655 } 2656 } 2657 2658 // TODO: remove this code once we know that the Slog.wtf is never hit. 2659 // 2660 // Find all networks that are satisfying this request and remove the request 2661 // from their request lists. 2662 // TODO - it's my understanding that for a request there is only a single 2663 // network satisfying it, so this loop is wasteful 2664 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2665 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2666 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2667 otherNai.name() + ", but mNetworkAgentInfos says " + 2668 (nai != null ? nai.name() : "null")); 2669 } 2670 } 2671 2672 // Maintain the illusion. When this request arrived, we might have pretended 2673 // that a network connected to serve it, even though the network was already 2674 // connected. Now that this request has gone away, we might have to pretend 2675 // that the network disconnected. LegacyTypeTracker will generate that 2676 // phantom disconnect for this type. 2677 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2678 boolean doRemove = true; 2679 if (wasKept) { 2680 // check if any of the remaining requests for this network are for the 2681 // same legacy type - if so, don't remove the nai 2682 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2683 NetworkRequest otherRequest = nai.requestAt(i); 2684 if (otherRequest.legacyType == nri.request.legacyType && 2685 otherRequest.isRequest()) { 2686 if (DBG) log(" still have other legacy request - leaving"); 2687 doRemove = false; 2688 } 2689 } 2690 } 2691 2692 if (doRemove) { 2693 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2694 } 2695 } 2696 2697 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2698 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2699 nri.request); 2700 } 2701 } else { 2702 // listens don't have a singular affectedNetwork. Check all networks to see 2703 // if this listen request applies and remove it. 2704 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2705 nai.removeRequest(nri.request.requestId); 2706 if (nri.request.networkCapabilities.hasSignalStrength() && 2707 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2708 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2709 } 2710 } 2711 } 2712 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED, 0); 2713 } 2714 2715 @Override 2716 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2717 enforceConnectivityInternalPermission(); 2718 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2719 accept ? 1 : 0, always ? 1: 0, network)); 2720 } 2721 2722 @Override 2723 public void setAvoidUnvalidated(Network network) { 2724 enforceConnectivityInternalPermission(); 2725 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_AVOID_UNVALIDATED, network)); 2726 } 2727 2728 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2729 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2730 " accept=" + accept + " always=" + always); 2731 2732 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2733 if (nai == null) { 2734 // Nothing to do. 2735 return; 2736 } 2737 2738 if (nai.everValidated) { 2739 // The network validated while the dialog box was up. Take no action. 2740 return; 2741 } 2742 2743 if (!nai.networkMisc.explicitlySelected) { 2744 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2745 } 2746 2747 if (accept != nai.networkMisc.acceptUnvalidated) { 2748 int oldScore = nai.getCurrentScore(); 2749 nai.networkMisc.acceptUnvalidated = accept; 2750 rematchAllNetworksAndRequests(nai, oldScore); 2751 sendUpdatedScoreToFactories(nai); 2752 } 2753 2754 if (always) { 2755 nai.asyncChannel.sendMessage( 2756 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2757 } 2758 2759 if (!accept) { 2760 // Tell the NetworkAgent to not automatically reconnect to the network. 2761 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2762 // Teardown the nework. 2763 teardownUnneededNetwork(nai); 2764 } 2765 2766 } 2767 2768 private void handleSetAvoidUnvalidated(Network network) { 2769 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2770 if (nai == null || nai.lastValidated) { 2771 // Nothing to do. The network either disconnected or revalidated. 2772 return; 2773 } 2774 if (!nai.avoidUnvalidated) { 2775 int oldScore = nai.getCurrentScore(); 2776 nai.avoidUnvalidated = true; 2777 rematchAllNetworksAndRequests(nai, oldScore); 2778 sendUpdatedScoreToFactories(nai); 2779 } 2780 } 2781 2782 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2783 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2784 mHandler.sendMessageDelayed( 2785 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2786 PROMPT_UNVALIDATED_DELAY_MS); 2787 } 2788 2789 private boolean mAvoidBadWifi = true; 2790 2791 public boolean avoidBadWifi() { 2792 return mAvoidBadWifi; 2793 } 2794 2795 @VisibleForTesting 2796 /** Whether the device or carrier configuration disables avoiding bad wifi by default. */ 2797 public boolean configRestrictsAvoidBadWifi() { 2798 return mContext.getResources().getInteger(R.integer.config_networkAvoidBadWifi) == 0; 2799 } 2800 2801 /** Whether we should display a notification when wifi becomes unvalidated. */ 2802 public boolean shouldNotifyWifiUnvalidated() { 2803 return configRestrictsAvoidBadWifi() && 2804 Settings.Global.getString(mContext.getContentResolver(), 2805 Settings.Global.NETWORK_AVOID_BAD_WIFI) == null; 2806 } 2807 2808 private boolean updateAvoidBadWifi() { 2809 boolean settingAvoidBadWifi = "1".equals(Settings.Global.getString( 2810 mContext.getContentResolver(), Settings.Global.NETWORK_AVOID_BAD_WIFI)); 2811 2812 boolean prev = mAvoidBadWifi; 2813 mAvoidBadWifi = settingAvoidBadWifi || !configRestrictsAvoidBadWifi(); 2814 return mAvoidBadWifi != prev; 2815 } 2816 2817 private void dumpAvoidBadWifiSettings(IndentingPrintWriter pw) { 2818 boolean configRestrict = configRestrictsAvoidBadWifi(); 2819 if (!configRestrict) { 2820 pw.println("Bad Wi-Fi avoidance: unrestricted"); 2821 return; 2822 } 2823 2824 pw.println("Bad Wi-Fi avoidance: " + avoidBadWifi()); 2825 pw.increaseIndent(); 2826 pw.println("Config restrict: " + configRestrict); 2827 2828 String value = Settings.Global.getString( 2829 mContext.getContentResolver(), Settings.Global.NETWORK_AVOID_BAD_WIFI); 2830 String description; 2831 // Can't use a switch statement because strings are legal case labels, but null is not. 2832 if ("0".equals(value)) { 2833 description = "get stuck"; 2834 } else if (value == null) { 2835 description = "prompt"; 2836 } else if ("1".equals(value)) { 2837 description = "avoid"; 2838 } else { 2839 description = value + " (?)"; 2840 } 2841 pw.println("User setting: " + description); 2842 pw.println("Network overrides:"); 2843 pw.increaseIndent(); 2844 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2845 if (nai.avoidUnvalidated) { 2846 pw.println(nai.name()); 2847 } 2848 } 2849 pw.decreaseIndent(); 2850 pw.decreaseIndent(); 2851 } 2852 2853 private void showValidationNotification(NetworkAgentInfo nai, NotificationType type) { 2854 final String action; 2855 switch (type) { 2856 case NO_INTERNET: 2857 action = ConnectivityManager.ACTION_PROMPT_UNVALIDATED; 2858 break; 2859 case LOST_INTERNET: 2860 action = ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION; 2861 break; 2862 default: 2863 Slog.wtf(TAG, "Unknown notification type " + type); 2864 return; 2865 } 2866 2867 Intent intent = new Intent(action); 2868 intent.setData(Uri.fromParts("netId", Integer.toString(nai.network.netId), null)); 2869 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2870 intent.setClassName("com.android.settings", 2871 "com.android.settings.wifi.WifiNoInternetDialog"); 2872 2873 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2874 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2875 mNotifier.showNotification(nai.network.netId, type, nai, null, pendingIntent, true); 2876 } 2877 2878 private void handlePromptUnvalidated(Network network) { 2879 if (VDBG) log("handlePromptUnvalidated " + network); 2880 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2881 2882 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2883 // we haven't already been told to switch to it regardless of whether it validated or not. 2884 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2885 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2886 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2887 return; 2888 } 2889 showValidationNotification(nai, NotificationType.NO_INTERNET); 2890 } 2891 2892 // TODO: Delete this like updateMobileDataAlwaysOn above. 2893 @VisibleForTesting 2894 void updateNetworkAvoidBadWifi() { 2895 mHandler.sendEmptyMessage(EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI); 2896 } 2897 2898 private void handleNetworkUnvalidated(NetworkAgentInfo nai) { 2899 NetworkCapabilities nc = nai.networkCapabilities; 2900 if (DBG) log("handleNetworkUnvalidated " + nai.name() + " cap=" + nc); 2901 2902 if (nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) && shouldNotifyWifiUnvalidated()) { 2903 showValidationNotification(nai, NotificationType.LOST_INTERNET); 2904 } 2905 } 2906 2907 private class InternalHandler extends Handler { 2908 public InternalHandler(Looper looper) { 2909 super(looper); 2910 } 2911 2912 @Override 2913 public void handleMessage(Message msg) { 2914 switch (msg.what) { 2915 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2916 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2917 String causedBy = null; 2918 synchronized (ConnectivityService.this) { 2919 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2920 mNetTransitionWakeLock.isHeld()) { 2921 mNetTransitionWakeLock.release(); 2922 causedBy = mNetTransitionWakeLockCausedBy; 2923 } else { 2924 break; 2925 } 2926 } 2927 if (VDBG) { 2928 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2929 log("Failed to find a new network - expiring NetTransition Wakelock"); 2930 } else { 2931 log("NetTransition Wakelock (" + 2932 (causedBy == null ? "unknown" : causedBy) + 2933 " cleared because we found a replacement network"); 2934 } 2935 } 2936 break; 2937 } 2938 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2939 handleDeprecatedGlobalHttpProxy(); 2940 break; 2941 } 2942 case EVENT_PROXY_HAS_CHANGED: { 2943 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2944 break; 2945 } 2946 case EVENT_REGISTER_NETWORK_FACTORY: { 2947 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2948 break; 2949 } 2950 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2951 handleUnregisterNetworkFactory((Messenger)msg.obj); 2952 break; 2953 } 2954 case EVENT_REGISTER_NETWORK_AGENT: { 2955 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2956 break; 2957 } 2958 case EVENT_REGISTER_NETWORK_REQUEST: 2959 case EVENT_REGISTER_NETWORK_LISTENER: { 2960 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2961 break; 2962 } 2963 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2964 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2965 handleRegisterNetworkRequestWithIntent(msg); 2966 break; 2967 } 2968 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2969 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2970 break; 2971 } 2972 case EVENT_RELEASE_NETWORK_REQUEST: { 2973 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2974 break; 2975 } 2976 case EVENT_SET_ACCEPT_UNVALIDATED: { 2977 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2978 break; 2979 } 2980 case EVENT_SET_AVOID_UNVALIDATED: { 2981 handleSetAvoidUnvalidated((Network) msg.obj); 2982 break; 2983 } 2984 case EVENT_PROMPT_UNVALIDATED: { 2985 handlePromptUnvalidated((Network) msg.obj); 2986 break; 2987 } 2988 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2989 handleMobileDataAlwaysOn(); 2990 break; 2991 } 2992 case EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI: { 2993 if (updateAvoidBadWifi()) { 2994 rematchAllNetworksAndRequests(null, 0); 2995 for (NetworkAgentInfo nai: mNetworkAgentInfos.values()) { 2996 if (nai.networkCapabilities.hasTransport( 2997 NetworkCapabilities.TRANSPORT_WIFI)) { 2998 sendUpdatedScoreToFactories(nai); 2999 } 3000 } 3001 } 3002 break; 3003 } 3004 case EVENT_REQUEST_LINKPROPERTIES: 3005 handleRequestLinkProperties((NetworkRequest) msg.obj, msg.arg1); 3006 break; 3007 case EVENT_REQUEST_NETCAPABILITIES: 3008 handleRequestNetworkCapabilities((NetworkRequest) msg.obj, msg.arg1); 3009 break; 3010 // Sent by KeepaliveTracker to process an app request on the state machine thread. 3011 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 3012 mKeepaliveTracker.handleStartKeepalive(msg); 3013 break; 3014 } 3015 // Sent by KeepaliveTracker to process an app request on the state machine thread. 3016 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 3017 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 3018 int slot = msg.arg1; 3019 int reason = msg.arg2; 3020 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 3021 break; 3022 } 3023 case EVENT_SYSTEM_READY: { 3024 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 3025 nai.networkMonitor.systemReady = true; 3026 } 3027 break; 3028 } 3029 } 3030 } 3031 } 3032 3033 // javadoc from interface 3034 @Override 3035 public int tether(String iface) { 3036 ConnectivityManager.enforceTetherChangePermission(mContext); 3037 if (isTetheringSupported()) { 3038 final int status = mTethering.tether(iface); 3039 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 3040 try { 3041 mPolicyManager.onTetheringChanged(iface, true); 3042 } catch (RemoteException e) { 3043 } 3044 } 3045 return status; 3046 } else { 3047 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3048 } 3049 } 3050 3051 // javadoc from interface 3052 @Override 3053 public int untether(String iface) { 3054 ConnectivityManager.enforceTetherChangePermission(mContext); 3055 3056 if (isTetheringSupported()) { 3057 final int status = mTethering.untether(iface); 3058 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 3059 try { 3060 mPolicyManager.onTetheringChanged(iface, false); 3061 } catch (RemoteException e) { 3062 } 3063 } 3064 return status; 3065 } else { 3066 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3067 } 3068 } 3069 3070 // javadoc from interface 3071 @Override 3072 public int getLastTetherError(String iface) { 3073 enforceTetherAccessPermission(); 3074 3075 if (isTetheringSupported()) { 3076 return mTethering.getLastTetherError(iface); 3077 } else { 3078 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3079 } 3080 } 3081 3082 // TODO - proper iface API for selection by property, inspection, etc 3083 @Override 3084 public String[] getTetherableUsbRegexs() { 3085 enforceTetherAccessPermission(); 3086 if (isTetheringSupported()) { 3087 return mTethering.getTetherableUsbRegexs(); 3088 } else { 3089 return new String[0]; 3090 } 3091 } 3092 3093 @Override 3094 public String[] getTetherableWifiRegexs() { 3095 enforceTetherAccessPermission(); 3096 if (isTetheringSupported()) { 3097 return mTethering.getTetherableWifiRegexs(); 3098 } else { 3099 return new String[0]; 3100 } 3101 } 3102 3103 @Override 3104 public String[] getTetherableBluetoothRegexs() { 3105 enforceTetherAccessPermission(); 3106 if (isTetheringSupported()) { 3107 return mTethering.getTetherableBluetoothRegexs(); 3108 } else { 3109 return new String[0]; 3110 } 3111 } 3112 3113 @Override 3114 public int setUsbTethering(boolean enable) { 3115 ConnectivityManager.enforceTetherChangePermission(mContext); 3116 if (isTetheringSupported()) { 3117 return mTethering.setUsbTethering(enable); 3118 } else { 3119 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3120 } 3121 } 3122 3123 // TODO - move iface listing, queries, etc to new module 3124 // javadoc from interface 3125 @Override 3126 public String[] getTetherableIfaces() { 3127 enforceTetherAccessPermission(); 3128 return mTethering.getTetherableIfaces(); 3129 } 3130 3131 @Override 3132 public String[] getTetheredIfaces() { 3133 enforceTetherAccessPermission(); 3134 return mTethering.getTetheredIfaces(); 3135 } 3136 3137 @Override 3138 public String[] getTetheringErroredIfaces() { 3139 enforceTetherAccessPermission(); 3140 return mTethering.getErroredIfaces(); 3141 } 3142 3143 @Override 3144 public String[] getTetheredDhcpRanges() { 3145 enforceConnectivityInternalPermission(); 3146 return mTethering.getTetheredDhcpRanges(); 3147 } 3148 3149 // if ro.tether.denied = true we default to no tethering 3150 // gservices could set the secure setting to 1 though to enable it on a build where it 3151 // had previously been turned off. 3152 @Override 3153 public boolean isTetheringSupported() { 3154 enforceTetherAccessPermission(); 3155 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 3156 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 3157 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 3158 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 3159 return tetherEnabledInSettings && mUserManager.isAdminUser() && 3160 ((mTethering.getTetherableUsbRegexs().length != 0 || 3161 mTethering.getTetherableWifiRegexs().length != 0 || 3162 mTethering.getTetherableBluetoothRegexs().length != 0) && 3163 mTethering.getUpstreamIfaceTypes().length != 0); 3164 } 3165 3166 @Override 3167 public void startTethering(int type, ResultReceiver receiver, 3168 boolean showProvisioningUi) { 3169 ConnectivityManager.enforceTetherChangePermission(mContext); 3170 if (!isTetheringSupported()) { 3171 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 3172 return; 3173 } 3174 mTethering.startTethering(type, receiver, showProvisioningUi); 3175 } 3176 3177 @Override 3178 public void stopTethering(int type) { 3179 ConnectivityManager.enforceTetherChangePermission(mContext); 3180 mTethering.stopTethering(type); 3181 } 3182 3183 // Called when we lose the default network and have no replacement yet. 3184 // This will automatically be cleared after X seconds or a new default network 3185 // becomes CONNECTED, whichever happens first. The timer is started by the 3186 // first caller and not restarted by subsequent callers. 3187 private void requestNetworkTransitionWakelock(String forWhom) { 3188 int serialNum = 0; 3189 synchronized (this) { 3190 if (mNetTransitionWakeLock.isHeld()) return; 3191 serialNum = ++mNetTransitionWakeLockSerialNumber; 3192 mNetTransitionWakeLock.acquire(); 3193 mNetTransitionWakeLockCausedBy = forWhom; 3194 } 3195 mHandler.sendMessageDelayed(mHandler.obtainMessage( 3196 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 3197 mNetTransitionWakeLockTimeout); 3198 return; 3199 } 3200 3201 // 100 percent is full good, 0 is full bad. 3202 @Override 3203 public void reportInetCondition(int networkType, int percentage) { 3204 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 3205 if (nai == null) return; 3206 reportNetworkConnectivity(nai.network, percentage > 50); 3207 } 3208 3209 @Override 3210 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 3211 enforceAccessPermission(); 3212 enforceInternetPermission(); 3213 3214 NetworkAgentInfo nai; 3215 if (network == null) { 3216 nai = getDefaultNetwork(); 3217 } else { 3218 nai = getNetworkAgentInfoForNetwork(network); 3219 } 3220 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 3221 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 3222 return; 3223 } 3224 // Revalidate if the app report does not match our current validated state. 3225 if (hasConnectivity == nai.lastValidated) return; 3226 final int uid = Binder.getCallingUid(); 3227 if (DBG) { 3228 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 3229 ") by " + uid); 3230 } 3231 synchronized (nai) { 3232 // Validating a network that has not yet connected could result in a call to 3233 // rematchNetworkAndRequests() which is not meant to work on such networks. 3234 if (!nai.everConnected) return; 3235 3236 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 3237 3238 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 3239 } 3240 } 3241 3242 private ProxyInfo getDefaultProxy() { 3243 // this information is already available as a world read/writable jvm property 3244 // so this API change wouldn't have a benifit. It also breaks the passing 3245 // of proxy info to all the JVMs. 3246 // enforceAccessPermission(); 3247 synchronized (mProxyLock) { 3248 ProxyInfo ret = mGlobalProxy; 3249 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3250 return ret; 3251 } 3252 } 3253 3254 @Override 3255 public ProxyInfo getProxyForNetwork(Network network) { 3256 if (network == null) return getDefaultProxy(); 3257 final ProxyInfo globalProxy = getGlobalProxy(); 3258 if (globalProxy != null) return globalProxy; 3259 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3260 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3261 // caller may not have. 3262 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3263 if (nai == null) return null; 3264 synchronized (nai) { 3265 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3266 if (proxyInfo == null) return null; 3267 return new ProxyInfo(proxyInfo); 3268 } 3269 } 3270 3271 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3272 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3273 // proxy is null then there is no proxy in place). 3274 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3275 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3276 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3277 proxy = null; 3278 } 3279 return proxy; 3280 } 3281 3282 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3283 // better for determining if a new proxy broadcast is necessary: 3284 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3285 // avoid unnecessary broadcasts. 3286 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3287 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3288 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3289 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3290 // all set. 3291 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3292 a = canonicalizeProxyInfo(a); 3293 b = canonicalizeProxyInfo(b); 3294 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3295 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3296 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3297 } 3298 3299 public void setGlobalProxy(ProxyInfo proxyProperties) { 3300 enforceConnectivityInternalPermission(); 3301 3302 synchronized (mProxyLock) { 3303 if (proxyProperties == mGlobalProxy) return; 3304 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3305 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3306 3307 String host = ""; 3308 int port = 0; 3309 String exclList = ""; 3310 String pacFileUrl = ""; 3311 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3312 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3313 if (!proxyProperties.isValid()) { 3314 if (DBG) 3315 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3316 return; 3317 } 3318 mGlobalProxy = new ProxyInfo(proxyProperties); 3319 host = mGlobalProxy.getHost(); 3320 port = mGlobalProxy.getPort(); 3321 exclList = mGlobalProxy.getExclusionListAsString(); 3322 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3323 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3324 } 3325 } else { 3326 mGlobalProxy = null; 3327 } 3328 ContentResolver res = mContext.getContentResolver(); 3329 final long token = Binder.clearCallingIdentity(); 3330 try { 3331 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3332 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3333 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3334 exclList); 3335 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3336 } finally { 3337 Binder.restoreCallingIdentity(token); 3338 } 3339 3340 if (mGlobalProxy == null) { 3341 proxyProperties = mDefaultProxy; 3342 } 3343 sendProxyBroadcast(proxyProperties); 3344 } 3345 } 3346 3347 private void loadGlobalProxy() { 3348 ContentResolver res = mContext.getContentResolver(); 3349 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3350 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3351 String exclList = Settings.Global.getString(res, 3352 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3353 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3354 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3355 ProxyInfo proxyProperties; 3356 if (!TextUtils.isEmpty(pacFileUrl)) { 3357 proxyProperties = new ProxyInfo(pacFileUrl); 3358 } else { 3359 proxyProperties = new ProxyInfo(host, port, exclList); 3360 } 3361 if (!proxyProperties.isValid()) { 3362 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3363 return; 3364 } 3365 3366 synchronized (mProxyLock) { 3367 mGlobalProxy = proxyProperties; 3368 } 3369 } 3370 } 3371 3372 public ProxyInfo getGlobalProxy() { 3373 // this information is already available as a world read/writable jvm property 3374 // so this API change wouldn't have a benifit. It also breaks the passing 3375 // of proxy info to all the JVMs. 3376 // enforceAccessPermission(); 3377 synchronized (mProxyLock) { 3378 return mGlobalProxy; 3379 } 3380 } 3381 3382 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3383 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3384 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3385 proxy = null; 3386 } 3387 synchronized (mProxyLock) { 3388 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3389 if (mDefaultProxy == proxy) return; // catches repeated nulls 3390 if (proxy != null && !proxy.isValid()) { 3391 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3392 return; 3393 } 3394 3395 // This call could be coming from the PacManager, containing the port of the local 3396 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3397 // global (to get the correct local port), and send a broadcast. 3398 // TODO: Switch PacManager to have its own message to send back rather than 3399 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3400 if ((mGlobalProxy != null) && (proxy != null) 3401 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3402 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3403 mGlobalProxy = proxy; 3404 sendProxyBroadcast(mGlobalProxy); 3405 return; 3406 } 3407 mDefaultProxy = proxy; 3408 3409 if (mGlobalProxy != null) return; 3410 if (!mDefaultProxyDisabled) { 3411 sendProxyBroadcast(proxy); 3412 } 3413 } 3414 } 3415 3416 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3417 // This method gets called when any network changes proxy, but the broadcast only ever contains 3418 // the default proxy (even if it hasn't changed). 3419 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3420 // world where an app might be bound to a non-default network. 3421 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3422 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3423 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3424 3425 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3426 sendProxyBroadcast(getDefaultProxy()); 3427 } 3428 } 3429 3430 private void handleDeprecatedGlobalHttpProxy() { 3431 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3432 Settings.Global.HTTP_PROXY); 3433 if (!TextUtils.isEmpty(proxy)) { 3434 String data[] = proxy.split(":"); 3435 if (data.length == 0) { 3436 return; 3437 } 3438 3439 String proxyHost = data[0]; 3440 int proxyPort = 8080; 3441 if (data.length > 1) { 3442 try { 3443 proxyPort = Integer.parseInt(data[1]); 3444 } catch (NumberFormatException e) { 3445 return; 3446 } 3447 } 3448 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3449 setGlobalProxy(p); 3450 } 3451 } 3452 3453 private void sendProxyBroadcast(ProxyInfo proxy) { 3454 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3455 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3456 if (DBG) log("sending Proxy Broadcast for " + proxy); 3457 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3458 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3459 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3460 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3461 final long ident = Binder.clearCallingIdentity(); 3462 try { 3463 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3464 } finally { 3465 Binder.restoreCallingIdentity(ident); 3466 } 3467 } 3468 3469 private static class SettingsObserver extends ContentObserver { 3470 final private HashMap<Uri, Integer> mUriEventMap; 3471 final private Context mContext; 3472 final private Handler mHandler; 3473 3474 SettingsObserver(Context context, Handler handler) { 3475 super(null); 3476 mUriEventMap = new HashMap<Uri, Integer>(); 3477 mContext = context; 3478 mHandler = handler; 3479 } 3480 3481 void observe(Uri uri, int what) { 3482 mUriEventMap.put(uri, what); 3483 final ContentResolver resolver = mContext.getContentResolver(); 3484 resolver.registerContentObserver(uri, false, this); 3485 } 3486 3487 @Override 3488 public void onChange(boolean selfChange) { 3489 Slog.wtf(TAG, "Should never be reached."); 3490 } 3491 3492 @Override 3493 public void onChange(boolean selfChange, Uri uri) { 3494 final Integer what = mUriEventMap.get(uri); 3495 if (what != null) { 3496 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3497 } else { 3498 loge("No matching event to send for URI=" + uri); 3499 } 3500 } 3501 } 3502 3503 private static void log(String s) { 3504 Slog.d(TAG, s); 3505 } 3506 3507 private static void loge(String s) { 3508 Slog.e(TAG, s); 3509 } 3510 3511 private static <T> T checkNotNull(T value, String message) { 3512 if (value == null) { 3513 throw new NullPointerException(message); 3514 } 3515 return value; 3516 } 3517 3518 /** 3519 * Prepare for a VPN application. 3520 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3521 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3522 * 3523 * @param oldPackage Package name of the application which currently controls VPN, which will 3524 * be replaced. If there is no such application, this should should either be 3525 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3526 * @param newPackage Package name of the application which should gain control of VPN, or 3527 * {@code null} to disable. 3528 * @param userId User for whom to prepare the new VPN. 3529 * 3530 * @hide 3531 */ 3532 @Override 3533 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3534 int userId) { 3535 enforceCrossUserPermission(userId); 3536 throwIfLockdownEnabled(); 3537 3538 synchronized(mVpns) { 3539 Vpn vpn = mVpns.get(userId); 3540 if (vpn != null) { 3541 return vpn.prepare(oldPackage, newPackage); 3542 } else { 3543 return false; 3544 } 3545 } 3546 } 3547 3548 /** 3549 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3550 * This method is used by system-privileged apps. 3551 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3552 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3553 * 3554 * @param packageName The package for which authorization state should change. 3555 * @param userId User for whom {@code packageName} is installed. 3556 * @param authorized {@code true} if this app should be able to start a VPN connection without 3557 * explicit user approval, {@code false} if not. 3558 * 3559 * @hide 3560 */ 3561 @Override 3562 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3563 enforceCrossUserPermission(userId); 3564 3565 synchronized(mVpns) { 3566 Vpn vpn = mVpns.get(userId); 3567 if (vpn != null) { 3568 vpn.setPackageAuthorization(packageName, authorized); 3569 } 3570 } 3571 } 3572 3573 /** 3574 * Configure a TUN interface and return its file descriptor. Parameters 3575 * are encoded and opaque to this class. This method is used by VpnBuilder 3576 * and not available in ConnectivityManager. Permissions are checked in 3577 * Vpn class. 3578 * @hide 3579 */ 3580 @Override 3581 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3582 throwIfLockdownEnabled(); 3583 int user = UserHandle.getUserId(Binder.getCallingUid()); 3584 synchronized(mVpns) { 3585 return mVpns.get(user).establish(config); 3586 } 3587 } 3588 3589 /** 3590 * Start legacy VPN, controlling native daemons as needed. Creates a 3591 * secondary thread to perform connection work, returning quickly. 3592 */ 3593 @Override 3594 public void startLegacyVpn(VpnProfile profile) { 3595 throwIfLockdownEnabled(); 3596 final LinkProperties egress = getActiveLinkProperties(); 3597 if (egress == null) { 3598 throw new IllegalStateException("Missing active network connection"); 3599 } 3600 int user = UserHandle.getUserId(Binder.getCallingUid()); 3601 synchronized(mVpns) { 3602 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3603 } 3604 } 3605 3606 /** 3607 * Return the information of the ongoing legacy VPN. This method is used 3608 * by VpnSettings and not available in ConnectivityManager. Permissions 3609 * are checked in Vpn class. 3610 */ 3611 @Override 3612 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3613 enforceCrossUserPermission(userId); 3614 3615 synchronized(mVpns) { 3616 return mVpns.get(userId).getLegacyVpnInfo(); 3617 } 3618 } 3619 3620 /** 3621 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3622 * and not available in ConnectivityManager. 3623 */ 3624 @Override 3625 public VpnInfo[] getAllVpnInfo() { 3626 enforceConnectivityInternalPermission(); 3627 if (mLockdownEnabled) { 3628 return new VpnInfo[0]; 3629 } 3630 3631 synchronized(mVpns) { 3632 List<VpnInfo> infoList = new ArrayList<>(); 3633 for (int i = 0; i < mVpns.size(); i++) { 3634 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3635 if (info != null) { 3636 infoList.add(info); 3637 } 3638 } 3639 return infoList.toArray(new VpnInfo[infoList.size()]); 3640 } 3641 } 3642 3643 /** 3644 * @return VPN information for accounting, or null if we can't retrieve all required 3645 * information, e.g primary underlying iface. 3646 */ 3647 @Nullable 3648 private VpnInfo createVpnInfo(Vpn vpn) { 3649 VpnInfo info = vpn.getVpnInfo(); 3650 if (info == null) { 3651 return null; 3652 } 3653 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3654 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3655 // the underlyingNetworks list. 3656 if (underlyingNetworks == null) { 3657 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3658 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3659 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3660 } 3661 } else if (underlyingNetworks.length > 0) { 3662 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3663 if (linkProperties != null) { 3664 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3665 } 3666 } 3667 return info.primaryUnderlyingIface == null ? null : info; 3668 } 3669 3670 /** 3671 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3672 * VpnDialogs and not available in ConnectivityManager. 3673 * Permissions are checked in Vpn class. 3674 * @hide 3675 */ 3676 @Override 3677 public VpnConfig getVpnConfig(int userId) { 3678 enforceCrossUserPermission(userId); 3679 synchronized(mVpns) { 3680 Vpn vpn = mVpns.get(userId); 3681 if (vpn != null) { 3682 return vpn.getVpnConfig(); 3683 } else { 3684 return null; 3685 } 3686 } 3687 } 3688 3689 @Override 3690 public boolean updateLockdownVpn() { 3691 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3692 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3693 return false; 3694 } 3695 3696 // Tear down existing lockdown if profile was removed 3697 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3698 if (mLockdownEnabled) { 3699 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3700 final VpnProfile profile = VpnProfile.decode( 3701 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3702 if (profile == null) { 3703 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3704 setLockdownTracker(null); 3705 return true; 3706 } 3707 int user = UserHandle.getUserId(Binder.getCallingUid()); 3708 synchronized(mVpns) { 3709 Vpn vpn = mVpns.get(user); 3710 if (vpn == null) { 3711 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3712 return false; 3713 } 3714 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3715 } 3716 } else { 3717 setLockdownTracker(null); 3718 } 3719 3720 return true; 3721 } 3722 3723 /** 3724 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3725 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3726 */ 3727 private void setLockdownTracker(LockdownVpnTracker tracker) { 3728 // Shutdown any existing tracker 3729 final LockdownVpnTracker existing = mLockdownTracker; 3730 mLockdownTracker = null; 3731 if (existing != null) { 3732 existing.shutdown(); 3733 } 3734 3735 try { 3736 if (tracker != null) { 3737 mNetd.setFirewallEnabled(true); 3738 mNetd.setFirewallInterfaceRule("lo", true); 3739 mLockdownTracker = tracker; 3740 mLockdownTracker.init(); 3741 } else { 3742 mNetd.setFirewallEnabled(false); 3743 } 3744 } catch (RemoteException e) { 3745 // ignored; NMS lives inside system_server 3746 } 3747 } 3748 3749 private void throwIfLockdownEnabled() { 3750 if (mLockdownEnabled) { 3751 throw new IllegalStateException("Unavailable in lockdown mode"); 3752 } 3753 } 3754 3755 /** 3756 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3757 * some setup and then call {@code establish()} to connect. 3758 * 3759 * @return {@code true} if the service was started, the service was already connected, or there 3760 * was no always-on VPN to start. {@code false} otherwise. 3761 */ 3762 private boolean startAlwaysOnVpn(int userId) { 3763 synchronized (mVpns) { 3764 Vpn vpn = mVpns.get(userId); 3765 if (vpn == null) { 3766 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3767 // exists already. 3768 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3769 return false; 3770 } 3771 3772 return vpn.startAlwaysOnVpn(); 3773 } 3774 } 3775 3776 @Override 3777 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3778 enforceConnectivityInternalPermission(); 3779 enforceCrossUserPermission(userId); 3780 3781 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3782 if (LockdownVpnTracker.isEnabled()) { 3783 return false; 3784 } 3785 3786 synchronized (mVpns) { 3787 Vpn vpn = mVpns.get(userId); 3788 if (vpn == null) { 3789 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3790 return false; 3791 } 3792 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3793 return false; 3794 } 3795 if (!startAlwaysOnVpn(userId)) { 3796 vpn.setAlwaysOnPackage(null, false); 3797 return false; 3798 } 3799 3800 vpn.saveAlwaysOnPackage(); 3801 } 3802 return true; 3803 } 3804 3805 @Override 3806 public String getAlwaysOnVpnPackage(int userId) { 3807 enforceConnectivityInternalPermission(); 3808 enforceCrossUserPermission(userId); 3809 3810 synchronized (mVpns) { 3811 Vpn vpn = mVpns.get(userId); 3812 if (vpn == null) { 3813 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3814 return null; 3815 } 3816 return vpn.getAlwaysOnPackage(); 3817 } 3818 } 3819 3820 @Override 3821 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3822 // TODO: Remove? Any reason to trigger a provisioning check? 3823 return -1; 3824 } 3825 3826 /** Location to an updatable file listing carrier provisioning urls. 3827 * An example: 3828 * 3829 * <?xml version="1.0" encoding="utf-8"?> 3830 * <provisioningUrls> 3831 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3832 * </provisioningUrls> 3833 */ 3834 private static final String PROVISIONING_URL_PATH = 3835 "/data/misc/radio/provisioning_urls.xml"; 3836 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3837 3838 /** XML tag for root element. */ 3839 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3840 /** XML tag for individual url */ 3841 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3842 /** XML attribute for mcc */ 3843 private static final String ATTR_MCC = "mcc"; 3844 /** XML attribute for mnc */ 3845 private static final String ATTR_MNC = "mnc"; 3846 3847 private String getProvisioningUrlBaseFromFile() { 3848 FileReader fileReader = null; 3849 XmlPullParser parser = null; 3850 Configuration config = mContext.getResources().getConfiguration(); 3851 3852 try { 3853 fileReader = new FileReader(mProvisioningUrlFile); 3854 parser = Xml.newPullParser(); 3855 parser.setInput(fileReader); 3856 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3857 3858 while (true) { 3859 XmlUtils.nextElement(parser); 3860 3861 String element = parser.getName(); 3862 if (element == null) break; 3863 3864 if (element.equals(TAG_PROVISIONING_URL)) { 3865 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3866 try { 3867 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3868 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3869 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3870 parser.next(); 3871 if (parser.getEventType() == XmlPullParser.TEXT) { 3872 return parser.getText(); 3873 } 3874 } 3875 } 3876 } catch (NumberFormatException e) { 3877 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3878 } 3879 } 3880 } 3881 return null; 3882 } catch (FileNotFoundException e) { 3883 loge("Carrier Provisioning Urls file not found"); 3884 } catch (XmlPullParserException e) { 3885 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3886 } catch (IOException e) { 3887 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3888 } finally { 3889 if (fileReader != null) { 3890 try { 3891 fileReader.close(); 3892 } catch (IOException e) {} 3893 } 3894 } 3895 return null; 3896 } 3897 3898 @Override 3899 public String getMobileProvisioningUrl() { 3900 enforceConnectivityInternalPermission(); 3901 String url = getProvisioningUrlBaseFromFile(); 3902 if (TextUtils.isEmpty(url)) { 3903 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3904 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3905 } else { 3906 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3907 } 3908 // populate the iccid, imei and phone number in the provisioning url. 3909 if (!TextUtils.isEmpty(url)) { 3910 String phoneNumber = mTelephonyManager.getLine1Number(); 3911 if (TextUtils.isEmpty(phoneNumber)) { 3912 phoneNumber = "0000000000"; 3913 } 3914 url = String.format(url, 3915 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3916 mTelephonyManager.getDeviceId() /* IMEI */, 3917 phoneNumber /* Phone numer */); 3918 } 3919 3920 return url; 3921 } 3922 3923 @Override 3924 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3925 String action) { 3926 enforceConnectivityInternalPermission(); 3927 final long ident = Binder.clearCallingIdentity(); 3928 try { 3929 // Concatenate the range of types onto the range of NetIDs. 3930 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3931 mNotifier.setProvNotificationVisible(visible, id, action); 3932 } finally { 3933 Binder.restoreCallingIdentity(ident); 3934 } 3935 } 3936 3937 @Override 3938 public void setAirplaneMode(boolean enable) { 3939 enforceConnectivityInternalPermission(); 3940 final long ident = Binder.clearCallingIdentity(); 3941 try { 3942 final ContentResolver cr = mContext.getContentResolver(); 3943 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3944 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3945 intent.putExtra("state", enable); 3946 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3947 } finally { 3948 Binder.restoreCallingIdentity(ident); 3949 } 3950 } 3951 3952 private void onUserStart(int userId) { 3953 synchronized(mVpns) { 3954 Vpn userVpn = mVpns.get(userId); 3955 if (userVpn != null) { 3956 loge("Starting user already has a VPN"); 3957 return; 3958 } 3959 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3960 mVpns.put(userId, userVpn); 3961 3962 final ContentResolver cr = mContext.getContentResolver(); 3963 String alwaysOnPackage = Settings.Secure.getStringForUser(cr, 3964 Settings.Secure.ALWAYS_ON_VPN_APP, userId); 3965 final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, 3966 Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; 3967 if (alwaysOnPackage != null) { 3968 userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); 3969 } 3970 } 3971 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3972 updateLockdownVpn(); 3973 } 3974 } 3975 3976 private void onUserStop(int userId) { 3977 synchronized(mVpns) { 3978 Vpn userVpn = mVpns.get(userId); 3979 if (userVpn == null) { 3980 loge("Stopped user has no VPN"); 3981 return; 3982 } 3983 userVpn.onUserStopped(); 3984 mVpns.delete(userId); 3985 } 3986 } 3987 3988 private void onUserAdded(int userId) { 3989 synchronized(mVpns) { 3990 final int vpnsSize = mVpns.size(); 3991 for (int i = 0; i < vpnsSize; i++) { 3992 Vpn vpn = mVpns.valueAt(i); 3993 vpn.onUserAdded(userId); 3994 } 3995 } 3996 } 3997 3998 private void onUserRemoved(int userId) { 3999 synchronized(mVpns) { 4000 final int vpnsSize = mVpns.size(); 4001 for (int i = 0; i < vpnsSize; i++) { 4002 Vpn vpn = mVpns.valueAt(i); 4003 vpn.onUserRemoved(userId); 4004 } 4005 } 4006 } 4007 4008 private void onUserUnlocked(int userId) { 4009 // User present may be sent because of an unlock, which might mean an unlocked keystore. 4010 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 4011 updateLockdownVpn(); 4012 } else { 4013 startAlwaysOnVpn(userId); 4014 } 4015 } 4016 4017 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 4018 @Override 4019 public void onReceive(Context context, Intent intent) { 4020 final String action = intent.getAction(); 4021 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 4022 if (userId == UserHandle.USER_NULL) return; 4023 4024 if (Intent.ACTION_USER_STARTED.equals(action)) { 4025 onUserStart(userId); 4026 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 4027 onUserStop(userId); 4028 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 4029 onUserAdded(userId); 4030 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 4031 onUserRemoved(userId); 4032 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 4033 onUserUnlocked(userId); 4034 } 4035 } 4036 }; 4037 4038 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 4039 new HashMap<Messenger, NetworkFactoryInfo>(); 4040 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 4041 new HashMap<NetworkRequest, NetworkRequestInfo>(); 4042 4043 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 4044 // Map from UID to number of NetworkRequests that UID has filed. 4045 @GuardedBy("mUidToNetworkRequestCount") 4046 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 4047 4048 private static class NetworkFactoryInfo { 4049 public final String name; 4050 public final Messenger messenger; 4051 public final AsyncChannel asyncChannel; 4052 4053 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 4054 this.name = name; 4055 this.messenger = messenger; 4056 this.asyncChannel = asyncChannel; 4057 } 4058 } 4059 4060 private void ensureNetworkRequestHasType(NetworkRequest request) { 4061 if (request.type == NetworkRequest.Type.NONE) { 4062 throw new IllegalArgumentException( 4063 "All NetworkRequests in ConnectivityService must have a type"); 4064 } 4065 } 4066 4067 /** 4068 * Tracks info about the requester. 4069 * Also used to notice when the calling process dies so we can self-expire 4070 */ 4071 private class NetworkRequestInfo implements IBinder.DeathRecipient { 4072 final NetworkRequest request; 4073 final PendingIntent mPendingIntent; 4074 boolean mPendingIntentSent; 4075 private final IBinder mBinder; 4076 final int mPid; 4077 final int mUid; 4078 final Messenger messenger; 4079 4080 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 4081 request = r; 4082 ensureNetworkRequestHasType(request); 4083 mPendingIntent = pi; 4084 messenger = null; 4085 mBinder = null; 4086 mPid = getCallingPid(); 4087 mUid = getCallingUid(); 4088 enforceRequestCountLimit(); 4089 } 4090 4091 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 4092 super(); 4093 messenger = m; 4094 request = r; 4095 ensureNetworkRequestHasType(request); 4096 mBinder = binder; 4097 mPid = getCallingPid(); 4098 mUid = getCallingUid(); 4099 mPendingIntent = null; 4100 enforceRequestCountLimit(); 4101 4102 try { 4103 mBinder.linkToDeath(this, 0); 4104 } catch (RemoteException e) { 4105 binderDied(); 4106 } 4107 } 4108 4109 private void enforceRequestCountLimit() { 4110 synchronized (mUidToNetworkRequestCount) { 4111 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 4112 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 4113 throw new IllegalArgumentException("Too many NetworkRequests filed"); 4114 } 4115 mUidToNetworkRequestCount.put(mUid, networkRequests); 4116 } 4117 } 4118 4119 void unlinkDeathRecipient() { 4120 if (mBinder != null) { 4121 mBinder.unlinkToDeath(this, 0); 4122 } 4123 } 4124 4125 public void binderDied() { 4126 log("ConnectivityService NetworkRequestInfo binderDied(" + 4127 request + ", " + mBinder + ")"); 4128 releaseNetworkRequest(request); 4129 } 4130 4131 public String toString() { 4132 return "uid/pid:" + mUid + "/" + mPid + " " + request + 4133 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 4134 } 4135 } 4136 4137 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 4138 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 4139 if (badCapability != null) { 4140 throw new IllegalArgumentException("Cannot request network with " + badCapability); 4141 } 4142 } 4143 4144 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 4145 final SortedSet<Integer> thresholds = new TreeSet(); 4146 synchronized (nai) { 4147 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4148 if (nri.request.networkCapabilities.hasSignalStrength() && 4149 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 4150 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 4151 } 4152 } 4153 } 4154 return new ArrayList<Integer>(thresholds); 4155 } 4156 4157 private void updateSignalStrengthThresholds( 4158 NetworkAgentInfo nai, String reason, NetworkRequest request) { 4159 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 4160 Bundle thresholds = new Bundle(); 4161 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 4162 4163 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 4164 String detail; 4165 if (request != null && request.networkCapabilities.hasSignalStrength()) { 4166 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 4167 } else { 4168 detail = reason; 4169 } 4170 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 4171 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 4172 } 4173 4174 nai.asyncChannel.sendMessage( 4175 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 4176 0, 0, thresholds); 4177 } 4178 4179 @Override 4180 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 4181 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 4182 final NetworkRequest.Type type = (networkCapabilities == null) 4183 ? NetworkRequest.Type.TRACK_DEFAULT 4184 : NetworkRequest.Type.REQUEST; 4185 // If the requested networkCapabilities is null, take them instead from 4186 // the default network request. This allows callers to keep track of 4187 // the system default network. 4188 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 4189 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 4190 enforceAccessPermission(); 4191 } else { 4192 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4193 enforceNetworkRequestPermissions(networkCapabilities); 4194 // TODO: this is incorrect. We mark the request as metered or not depending on the state 4195 // of the app when the request is filed, but we never change the request if the app 4196 // changes network state. http://b/29964605 4197 enforceMeteredApnPolicy(networkCapabilities); 4198 } 4199 ensureRequestableCapabilities(networkCapabilities); 4200 4201 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 4202 throw new IllegalArgumentException("Bad timeout specified"); 4203 } 4204 4205 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 4206 .equals(networkCapabilities.getNetworkSpecifier())) { 4207 throw new IllegalArgumentException("Invalid network specifier - must not be '" 4208 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 4209 } 4210 4211 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4212 nextNetworkRequestId(), type); 4213 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4214 if (DBG) log("requestNetwork for " + nri); 4215 4216 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4217 if (timeoutMs > 0) { 4218 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4219 nri), timeoutMs); 4220 } 4221 return networkRequest; 4222 } 4223 4224 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4225 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4226 enforceConnectivityRestrictedNetworksPermission(); 4227 } else { 4228 enforceChangePermission(); 4229 } 4230 } 4231 4232 @Override 4233 public boolean requestBandwidthUpdate(Network network) { 4234 enforceAccessPermission(); 4235 NetworkAgentInfo nai = null; 4236 if (network == null) { 4237 return false; 4238 } 4239 synchronized (mNetworkForNetId) { 4240 nai = mNetworkForNetId.get(network.netId); 4241 } 4242 if (nai != null) { 4243 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4244 return true; 4245 } 4246 return false; 4247 } 4248 4249 private boolean isSystem(int uid) { 4250 return uid < Process.FIRST_APPLICATION_UID; 4251 } 4252 4253 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4254 final int uid = Binder.getCallingUid(); 4255 if (isSystem(uid)) { 4256 return; 4257 } 4258 // if UID is restricted, don't allow them to bring up metered APNs 4259 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 4260 final int uidRules; 4261 synchronized(mRulesLock) { 4262 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 4263 } 4264 if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 4265 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { 4266 // we could silently fail or we can filter the available nets to only give 4267 // them those they have access to. Chose the more useful option. 4268 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4269 } 4270 } 4271 } 4272 4273 @Override 4274 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4275 PendingIntent operation) { 4276 checkNotNull(operation, "PendingIntent cannot be null."); 4277 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4278 enforceNetworkRequestPermissions(networkCapabilities); 4279 enforceMeteredApnPolicy(networkCapabilities); 4280 ensureRequestableCapabilities(networkCapabilities); 4281 4282 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4283 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4284 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4285 if (DBG) log("pendingRequest for " + nri); 4286 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4287 nri)); 4288 return networkRequest; 4289 } 4290 4291 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4292 mHandler.sendMessageDelayed( 4293 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4294 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4295 } 4296 4297 @Override 4298 public void releasePendingNetworkRequest(PendingIntent operation) { 4299 checkNotNull(operation, "PendingIntent cannot be null."); 4300 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4301 getCallingUid(), 0, operation)); 4302 } 4303 4304 // In order to implement the compatibility measure for pre-M apps that call 4305 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4306 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4307 // This ensures it has permission to do so. 4308 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4309 if (nc == null) { 4310 return false; 4311 } 4312 int[] transportTypes = nc.getTransportTypes(); 4313 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4314 return false; 4315 } 4316 try { 4317 mContext.enforceCallingOrSelfPermission( 4318 android.Manifest.permission.ACCESS_WIFI_STATE, 4319 "ConnectivityService"); 4320 } catch (SecurityException e) { 4321 return false; 4322 } 4323 return true; 4324 } 4325 4326 @Override 4327 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4328 Messenger messenger, IBinder binder) { 4329 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4330 enforceAccessPermission(); 4331 } 4332 4333 NetworkRequest networkRequest = new NetworkRequest( 4334 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4335 NetworkRequest.Type.LISTEN); 4336 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4337 if (VDBG) log("listenForNetwork for " + nri); 4338 4339 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4340 return networkRequest; 4341 } 4342 4343 @Override 4344 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4345 PendingIntent operation) { 4346 checkNotNull(operation, "PendingIntent cannot be null."); 4347 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4348 enforceAccessPermission(); 4349 } 4350 4351 NetworkRequest networkRequest = new NetworkRequest( 4352 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4353 NetworkRequest.Type.LISTEN); 4354 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4355 if (VDBG) log("pendingListenForNetwork for " + nri); 4356 4357 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4358 } 4359 4360 @Override 4361 public void requestLinkProperties(NetworkRequest networkRequest) { 4362 ensureNetworkRequestHasType(networkRequest); 4363 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4364 mHandler.sendMessage(mHandler.obtainMessage( 4365 EVENT_REQUEST_LINKPROPERTIES, getCallingUid(), 0, networkRequest)); 4366 } 4367 4368 @Override 4369 public void requestNetworkCapabilities(NetworkRequest networkRequest) { 4370 ensureNetworkRequestHasType(networkRequest); 4371 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4372 mHandler.sendMessage(mHandler.obtainMessage( 4373 EVENT_REQUEST_NETCAPABILITIES, getCallingUid(), 0, networkRequest)); 4374 } 4375 4376 @Override 4377 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4378 ensureNetworkRequestHasType(networkRequest); 4379 mHandler.sendMessage(mHandler.obtainMessage( 4380 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4381 } 4382 4383 @Override 4384 public void registerNetworkFactory(Messenger messenger, String name) { 4385 enforceConnectivityInternalPermission(); 4386 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4387 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4388 } 4389 4390 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4391 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4392 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4393 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4394 } 4395 4396 @Override 4397 public void unregisterNetworkFactory(Messenger messenger) { 4398 enforceConnectivityInternalPermission(); 4399 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4400 } 4401 4402 private void handleUnregisterNetworkFactory(Messenger messenger) { 4403 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4404 if (nfi == null) { 4405 loge("Failed to find Messenger in unregisterNetworkFactory"); 4406 return; 4407 } 4408 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4409 } 4410 4411 /** 4412 * NetworkAgentInfo supporting a request by requestId. 4413 * These have already been vetted (their Capabilities satisfy the request) 4414 * and the are the highest scored network available. 4415 * the are keyed off the Requests requestId. 4416 */ 4417 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4418 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4419 new SparseArray<NetworkAgentInfo>(); 4420 4421 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4422 @GuardedBy("mNetworkForNetId") 4423 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4424 new SparseArray<NetworkAgentInfo>(); 4425 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4426 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4427 // there may not be a strict 1:1 correlation between the two. 4428 @GuardedBy("mNetworkForNetId") 4429 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4430 4431 // NetworkAgentInfo keyed off its connecting messenger 4432 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4433 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4434 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4435 new HashMap<Messenger, NetworkAgentInfo>(); 4436 4437 @GuardedBy("mBlockedAppUids") 4438 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4439 4440 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4441 private final NetworkRequest mDefaultRequest; 4442 4443 // Request used to optionally keep mobile data active even when higher 4444 // priority networks like Wi-Fi are active. 4445 private final NetworkRequest mDefaultMobileDataRequest; 4446 4447 private NetworkAgentInfo getDefaultNetwork() { 4448 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4449 } 4450 4451 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4452 return nai == getDefaultNetwork(); 4453 } 4454 4455 private boolean isDefaultRequest(NetworkRequestInfo nri) { 4456 return nri.request.requestId == mDefaultRequest.requestId; 4457 } 4458 4459 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4460 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4461 int currentScore, NetworkMisc networkMisc) { 4462 enforceConnectivityInternalPermission(); 4463 4464 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4465 // satisfies mDefaultRequest. 4466 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4467 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4468 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4469 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4470 synchronized (this) { 4471 nai.networkMonitor.systemReady = mSystemReady; 4472 } 4473 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, 4474 networkInfo.getExtraInfo()); 4475 if (DBG) log("registerNetworkAgent " + nai); 4476 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4477 return nai.network.netId; 4478 } 4479 4480 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4481 if (VDBG) log("Got NetworkAgent Messenger"); 4482 mNetworkAgentInfos.put(na.messenger, na); 4483 synchronized (mNetworkForNetId) { 4484 mNetworkForNetId.put(na.network.netId, na); 4485 } 4486 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4487 NetworkInfo networkInfo = na.networkInfo; 4488 na.networkInfo = null; 4489 updateNetworkInfo(na, networkInfo); 4490 } 4491 4492 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4493 LinkProperties newLp = networkAgent.linkProperties; 4494 int netId = networkAgent.network.netId; 4495 4496 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4497 // we do anything else, make sure its LinkProperties are accurate. 4498 if (networkAgent.clatd != null) { 4499 networkAgent.clatd.fixupLinkProperties(oldLp); 4500 } 4501 4502 updateInterfaces(newLp, oldLp, netId); 4503 updateMtu(newLp, oldLp); 4504 // TODO - figure out what to do for clat 4505// for (LinkProperties lp : newLp.getStackedLinks()) { 4506// updateMtu(lp, null); 4507// } 4508 updateTcpBufferSizes(networkAgent); 4509 4510 updateRoutes(newLp, oldLp, netId); 4511 updateDnses(newLp, oldLp, netId); 4512 4513 updateClat(newLp, oldLp, networkAgent); 4514 if (isDefaultNetwork(networkAgent)) { 4515 handleApplyDefaultProxy(newLp.getHttpProxy()); 4516 } else { 4517 updateProxy(newLp, oldLp, networkAgent); 4518 } 4519 // TODO - move this check to cover the whole function 4520 if (!Objects.equals(newLp, oldLp)) { 4521 notifyIfacesChangedForNetworkStats(); 4522 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4523 } 4524 4525 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4526 } 4527 4528 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4529 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4530 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4531 4532 if (!wasRunningClat && shouldRunClat) { 4533 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4534 nai.clatd.start(); 4535 } else if (wasRunningClat && !shouldRunClat) { 4536 nai.clatd.stop(); 4537 } 4538 } 4539 4540 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4541 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4542 if (oldLp != null) { 4543 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4544 } else if (newLp != null) { 4545 interfaceDiff.added = newLp.getAllInterfaceNames(); 4546 } 4547 for (String iface : interfaceDiff.added) { 4548 try { 4549 if (DBG) log("Adding iface " + iface + " to network " + netId); 4550 mNetd.addInterfaceToNetwork(iface, netId); 4551 } catch (Exception e) { 4552 loge("Exception adding interface: " + e); 4553 } 4554 } 4555 for (String iface : interfaceDiff.removed) { 4556 try { 4557 if (DBG) log("Removing iface " + iface + " from network " + netId); 4558 mNetd.removeInterfaceFromNetwork(iface, netId); 4559 } catch (Exception e) { 4560 loge("Exception removing interface: " + e); 4561 } 4562 } 4563 } 4564 4565 /** 4566 * Have netd update routes from oldLp to newLp. 4567 * @return true if routes changed between oldLp and newLp 4568 */ 4569 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4570 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4571 if (oldLp != null) { 4572 routeDiff = oldLp.compareAllRoutes(newLp); 4573 } else if (newLp != null) { 4574 routeDiff.added = newLp.getAllRoutes(); 4575 } 4576 4577 // add routes before removing old in case it helps with continuous connectivity 4578 4579 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4580 for (RouteInfo route : routeDiff.added) { 4581 if (route.hasGateway()) continue; 4582 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4583 try { 4584 mNetd.addRoute(netId, route); 4585 } catch (Exception e) { 4586 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4587 loge("Exception in addRoute for non-gateway: " + e); 4588 } 4589 } 4590 } 4591 for (RouteInfo route : routeDiff.added) { 4592 if (route.hasGateway() == false) continue; 4593 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4594 try { 4595 mNetd.addRoute(netId, route); 4596 } catch (Exception e) { 4597 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4598 loge("Exception in addRoute for gateway: " + e); 4599 } 4600 } 4601 } 4602 4603 for (RouteInfo route : routeDiff.removed) { 4604 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4605 try { 4606 mNetd.removeRoute(netId, route); 4607 } catch (Exception e) { 4608 loge("Exception in removeRoute: " + e); 4609 } 4610 } 4611 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4612 } 4613 4614 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4615 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4616 return; // no updating necessary 4617 } 4618 4619 Collection<InetAddress> dnses = newLp.getDnsServers(); 4620 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4621 try { 4622 mNetd.setDnsConfigurationForNetwork( 4623 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4624 } catch (Exception e) { 4625 loge("Exception in setDnsConfigurationForNetwork: " + e); 4626 } 4627 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4628 if (defaultNai != null && defaultNai.network.netId == netId) { 4629 setDefaultDnsSystemProperties(dnses); 4630 } 4631 flushVmDnsCache(); 4632 } 4633 4634 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4635 int last = 0; 4636 for (InetAddress dns : dnses) { 4637 ++last; 4638 String key = "net.dns" + last; 4639 String value = dns.getHostAddress(); 4640 SystemProperties.set(key, value); 4641 } 4642 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4643 String key = "net.dns" + i; 4644 SystemProperties.set(key, ""); 4645 } 4646 mNumDnsEntries = last; 4647 } 4648 4649 /** 4650 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4651 * augmented with any stateful capabilities implied from {@code networkAgent} 4652 * (e.g., validated status and captive portal status). 4653 * 4654 * @param oldScore score of the network before any of the changes that prompted us 4655 * to call this function. 4656 * @param nai the network having its capabilities updated. 4657 * @param networkCapabilities the new network capabilities. 4658 */ 4659 private void updateCapabilities( 4660 int oldScore, NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4661 if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( 4662 networkCapabilities)) { 4663 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 4664 + nai.networkCapabilities + " -> " + networkCapabilities); 4665 } 4666 4667 // Don't modify caller's NetworkCapabilities. 4668 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4669 if (nai.lastValidated) { 4670 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4671 } else { 4672 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4673 } 4674 if (nai.lastCaptivePortalDetected) { 4675 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4676 } else { 4677 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4678 } 4679 if (nai.isBackgroundNetwork()) { 4680 networkCapabilities.removeCapability(NET_CAPABILITY_FOREGROUND); 4681 } else { 4682 networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 4683 } 4684 4685 if (Objects.equals(nai.networkCapabilities, networkCapabilities)) return; 4686 4687 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4688 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4689 try { 4690 mNetd.setNetworkPermission(nai.network.netId, 4691 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4692 null : NetworkManagementService.PERMISSION_SYSTEM); 4693 } catch (RemoteException e) { 4694 loge("Exception in setNetworkPermission: " + e); 4695 } 4696 } 4697 4698 final NetworkCapabilities prevNc = nai.networkCapabilities; 4699 synchronized (nai) { 4700 nai.networkCapabilities = networkCapabilities; 4701 } 4702 if (nai.getCurrentScore() == oldScore && 4703 networkCapabilities.equalRequestableCapabilities(prevNc)) { 4704 // If the requestable capabilities haven't changed, and the score hasn't changed, then 4705 // the change we're processing can't affect any requests, it can only affect the listens 4706 // on this network. We might have been called by rematchNetworkAndRequests when a 4707 // network changed foreground state. 4708 processListenRequests(nai, true); 4709 } else { 4710 // If the requestable capabilities have changed or the score changed, we can't have been 4711 // called by rematchNetworkAndRequests, so it's safe to start a rematch. 4712 rematchAllNetworksAndRequests(nai, oldScore); 4713 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4714 } 4715 } 4716 4717 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4718 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4719 NetworkRequest nr = nai.requestAt(i); 4720 // Don't send listening requests to factories. b/17393458 4721 if (nr.isListen()) continue; 4722 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4723 } 4724 } 4725 4726 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4727 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4728 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4729 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4730 networkRequest); 4731 } 4732 } 4733 4734 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4735 int notificationType) { 4736 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4737 Intent intent = new Intent(); 4738 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4739 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4740 nri.mPendingIntentSent = true; 4741 sendIntent(nri.mPendingIntent, intent); 4742 } 4743 // else not handled 4744 } 4745 4746 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4747 mPendingIntentWakeLock.acquire(); 4748 try { 4749 if (DBG) log("Sending " + pendingIntent); 4750 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4751 } catch (PendingIntent.CanceledException e) { 4752 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4753 mPendingIntentWakeLock.release(); 4754 releasePendingNetworkRequest(pendingIntent); 4755 } 4756 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4757 } 4758 4759 @Override 4760 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4761 String resultData, Bundle resultExtras) { 4762 if (DBG) log("Finished sending " + pendingIntent); 4763 mPendingIntentWakeLock.release(); 4764 // Release with a delay so the receiving client has an opportunity to put in its 4765 // own request. 4766 releasePendingNetworkRequestWithDelay(pendingIntent); 4767 } 4768 4769 private void callCallbackForRequest(NetworkRequestInfo nri, 4770 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 4771 if (nri.messenger == null) return; // Default request has no msgr 4772 Bundle bundle = new Bundle(); 4773 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4774 new NetworkRequest(nri.request)); 4775 Message msg = Message.obtain(); 4776 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4777 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4778 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4779 } 4780 switch (notificationType) { 4781 case ConnectivityManager.CALLBACK_LOSING: { 4782 msg.arg1 = arg1; 4783 break; 4784 } 4785 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4786 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4787 new NetworkCapabilities(networkAgent.networkCapabilities)); 4788 break; 4789 } 4790 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4791 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4792 new LinkProperties(networkAgent.linkProperties)); 4793 break; 4794 } 4795 } 4796 msg.what = notificationType; 4797 msg.setData(bundle); 4798 try { 4799 if (VDBG) { 4800 log("sending notification " + notifyTypeToName(notificationType) + 4801 " for " + nri.request); 4802 } 4803 nri.messenger.send(msg); 4804 } catch (RemoteException e) { 4805 // may occur naturally in the race of binder death. 4806 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4807 } 4808 } 4809 4810 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4811 if (nai.numRequestNetworkRequests() != 0) { 4812 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4813 NetworkRequest nr = nai.requestAt(i); 4814 // Ignore listening requests. 4815 if (nr.isListen()) continue; 4816 loge("Dead network still had at least " + nr); 4817 break; 4818 } 4819 } 4820 nai.asyncChannel.disconnect(); 4821 } 4822 4823 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4824 if (oldNetwork == null) { 4825 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4826 return; 4827 } 4828 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4829 4830 // If we get here it means that the last linger timeout for this network expired. So there 4831 // must be no other active linger timers, and we must stop lingering. 4832 oldNetwork.clearLingerState(); 4833 4834 if (unneeded(oldNetwork, UnneededFor.TEARDOWN)) { 4835 // Tear the network down. 4836 teardownUnneededNetwork(oldNetwork); 4837 } else { 4838 // Put the network in the background. 4839 updateCapabilities(oldNetwork.getCurrentScore(), oldNetwork, 4840 oldNetwork.networkCapabilities); 4841 } 4842 } 4843 4844 private void makeDefault(NetworkAgentInfo newNetwork) { 4845 if (DBG) log("Switching to new default network: " + newNetwork); 4846 setupDataActivityTracking(newNetwork); 4847 try { 4848 mNetd.setDefaultNetId(newNetwork.network.netId); 4849 } catch (Exception e) { 4850 loge("Exception setting default network :" + e); 4851 } 4852 notifyLockdownVpn(newNetwork); 4853 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4854 updateTcpBufferSizes(newNetwork); 4855 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4856 } 4857 4858 private void processListenRequests(NetworkAgentInfo nai, boolean capabilitiesChanged) { 4859 // For consistency with previous behaviour, send onLost callbacks before onAvailable. 4860 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4861 NetworkRequest nr = nri.request; 4862 if (!nr.isListen()) continue; 4863 if (nai.isSatisfyingRequest(nr.requestId) && !nai.satisfies(nr)) { 4864 nai.removeRequest(nri.request.requestId); 4865 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_LOST, 0); 4866 } 4867 } 4868 4869 if (capabilitiesChanged) { 4870 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4871 } 4872 4873 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4874 NetworkRequest nr = nri.request; 4875 if (!nr.isListen()) continue; 4876 if (nai.satisfies(nr) && !nai.isSatisfyingRequest(nr.requestId)) { 4877 nai.addRequest(nr); 4878 notifyNetworkCallback(nai, nri); 4879 } 4880 } 4881 } 4882 4883 // Handles a network appearing or improving its score. 4884 // 4885 // - Evaluates all current NetworkRequests that can be 4886 // satisfied by newNetwork, and reassigns to newNetwork 4887 // any such requests for which newNetwork is the best. 4888 // 4889 // - Lingers any validated Networks that as a result are no longer 4890 // needed. A network is needed if it is the best network for 4891 // one or more NetworkRequests, or if it is a VPN. 4892 // 4893 // - Tears down newNetwork if it just became validated 4894 // but turns out to be unneeded. 4895 // 4896 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4897 // networks that have no chance (i.e. even if validated) 4898 // of becoming the highest scoring network. 4899 // 4900 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4901 // it does not remove NetworkRequests that other Networks could better satisfy. 4902 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4903 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4904 // as it performs better by a factor of the number of Networks. 4905 // 4906 // @param newNetwork is the network to be matched against NetworkRequests. 4907 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4908 // performed to tear down unvalidated networks that have no chance (i.e. even if 4909 // validated) of becoming the highest scoring network. 4910 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4911 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 4912 if (!newNetwork.everConnected) return; 4913 boolean keep = newNetwork.isVPN(); 4914 boolean isNewDefault = false; 4915 NetworkAgentInfo oldDefaultNetwork = null; 4916 4917 final boolean wasBackgroundNetwork = newNetwork.isBackgroundNetwork(); 4918 final int score = newNetwork.getCurrentScore(); 4919 4920 if (VDBG) log("rematching " + newNetwork.name()); 4921 4922 // Find and migrate to this Network any NetworkRequests for 4923 // which this network is now the best. 4924 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4925 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4926 NetworkCapabilities nc = newNetwork.networkCapabilities; 4927 if (VDBG) log(" network has: " + nc); 4928 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4929 // Process requests in the first pass and listens in the second pass. This allows us to 4930 // change a network's capabilities depending on which requests it has. This is only 4931 // correct if the change in capabilities doesn't affect whether the network satisfies 4932 // requests or not, and doesn't affect the network's score. 4933 if (nri.request.isListen()) continue; 4934 4935 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4936 final boolean satisfies = newNetwork.satisfies(nri.request); 4937 if (newNetwork == currentNetwork && satisfies) { 4938 if (VDBG) { 4939 log("Network " + newNetwork.name() + " was already satisfying" + 4940 " request " + nri.request.requestId + ". No change."); 4941 } 4942 keep = true; 4943 continue; 4944 } 4945 4946 // check if it satisfies the NetworkCapabilities 4947 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4948 if (satisfies) { 4949 // next check if it's better than any current network we're using for 4950 // this request 4951 if (VDBG) { 4952 log("currentScore = " + 4953 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4954 ", newScore = " + score); 4955 } 4956 if (currentNetwork == null || currentNetwork.getCurrentScore() < score) { 4957 if (VDBG) log("rematch for " + newNetwork.name()); 4958 if (currentNetwork != null) { 4959 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4960 currentNetwork.removeRequest(nri.request.requestId); 4961 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 4962 affectedNetworks.add(currentNetwork); 4963 } else { 4964 if (VDBG) log(" accepting network in place of null"); 4965 } 4966 newNetwork.unlingerRequest(nri.request); 4967 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4968 if (!newNetwork.addRequest(nri.request)) { 4969 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4970 } 4971 addedRequests.add(nri); 4972 keep = true; 4973 // Tell NetworkFactories about the new score, so they can stop 4974 // trying to connect if they know they cannot match it. 4975 // TODO - this could get expensive if we have alot of requests for this 4976 // network. Think about if there is a way to reduce this. Push 4977 // netid->request mapping to each factory? 4978 sendUpdatedScoreToFactories(nri.request, score); 4979 if (isDefaultRequest(nri)) { 4980 isNewDefault = true; 4981 oldDefaultNetwork = currentNetwork; 4982 if (currentNetwork != null) { 4983 mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork); 4984 } 4985 } 4986 } 4987 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 4988 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4989 // mark it as no longer satisfying "nri". Because networks are processed by 4990 // rematchAllNetworksAndRequests() in descending score order, "currentNetwork" will 4991 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4992 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4993 // This means this code doesn't have to handle the case where "currentNetwork" no 4994 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4995 if (DBG) { 4996 log("Network " + newNetwork.name() + " stopped satisfying" + 4997 " request " + nri.request.requestId); 4998 } 4999 newNetwork.removeRequest(nri.request.requestId); 5000 if (currentNetwork == newNetwork) { 5001 mNetworkForRequestId.remove(nri.request.requestId); 5002 sendUpdatedScoreToFactories(nri.request, 0); 5003 } else { 5004 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 5005 newNetwork.name() + 5006 " without updating mNetworkForRequestId or factories!"); 5007 } 5008 // TODO: Technically, sending CALLBACK_LOST here is 5009 // incorrect if there is a replacement network currently 5010 // connected that can satisfy nri, which is a request 5011 // (not a listen). However, the only capability that can both 5012 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 5013 // so this code is only incorrect for a network that loses 5014 // the TRUSTED capability, which is a rare case. 5015 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 5016 } 5017 } 5018 if (isNewDefault) { 5019 // Notify system services that this network is up. 5020 makeDefault(newNetwork); 5021 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 5022 logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); 5023 synchronized (ConnectivityService.this) { 5024 // have a new default network, release the transition wakelock in 5025 // a second if it's held. The second pause is to allow apps 5026 // to reconnect over the new network 5027 if (mNetTransitionWakeLock.isHeld()) { 5028 mHandler.sendMessageDelayed(mHandler.obtainMessage( 5029 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 5030 mNetTransitionWakeLockSerialNumber, 0), 5031 1000); 5032 } 5033 } 5034 } 5035 5036 if (!newNetwork.networkCapabilities.equalRequestableCapabilities(nc)) { 5037 Slog.wtf(TAG, String.format( 5038 "BUG: %s changed requestable capabilities during rematch: %s -> %s", 5039 nc, newNetwork.networkCapabilities)); 5040 } 5041 if (newNetwork.getCurrentScore() != score) { 5042 Slog.wtf(TAG, String.format( 5043 "BUG: %s changed score during rematch: %d -> %d", 5044 score, newNetwork.getCurrentScore())); 5045 } 5046 5047 // Second pass: process all listens. 5048 if (wasBackgroundNetwork != newNetwork.isBackgroundNetwork()) { 5049 // If the network went from background to foreground or vice versa, we need to update 5050 // its foreground state. It is safe to do this after rematching the requests because 5051 // NET_CAPABILITY_FOREGROUND does not affect requests, as is not a requestable 5052 // capability and does not affect the network's score (see the Slog.wtf call above). 5053 updateCapabilities(score, newNetwork, newNetwork.networkCapabilities); 5054 } else { 5055 processListenRequests(newNetwork, false); 5056 } 5057 5058 // do this after the default net is switched, but 5059 // before LegacyTypeTracker sends legacy broadcasts 5060 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 5061 5062 // Linger any networks that are no longer needed. This should be done after sending the 5063 // available callback for newNetwork. 5064 for (NetworkAgentInfo nai : affectedNetworks) { 5065 updateLingerState(nai, now); 5066 } 5067 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 5068 // does not need to be done in any particular order. 5069 updateLingerState(newNetwork, now); 5070 5071 if (isNewDefault) { 5072 // Maintain the illusion: since the legacy API only 5073 // understands one network at a time, we must pretend 5074 // that the current default network disconnected before 5075 // the new one connected. 5076 if (oldDefaultNetwork != null) { 5077 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 5078 oldDefaultNetwork, true); 5079 } 5080 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 5081 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 5082 notifyLockdownVpn(newNetwork); 5083 } 5084 5085 if (keep) { 5086 // Notify battery stats service about this network, both the normal 5087 // interface and any stacked links. 5088 // TODO: Avoid redoing this; this must only be done once when a network comes online. 5089 try { 5090 final IBatteryStats bs = BatteryStatsService.getService(); 5091 final int type = newNetwork.networkInfo.getType(); 5092 5093 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 5094 bs.noteNetworkInterfaceType(baseIface, type); 5095 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 5096 final String stackedIface = stacked.getInterfaceName(); 5097 bs.noteNetworkInterfaceType(stackedIface, type); 5098 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 5099 } 5100 } catch (RemoteException ignored) { 5101 } 5102 5103 // This has to happen after the notifyNetworkCallbacks as that tickles each 5104 // ConnectivityManager instance so that legacy requests correctly bind dns 5105 // requests to this network. The legacy users are listening for this bcast 5106 // and will generally do a dns request so they can ensureRouteToHost and if 5107 // they do that before the callbacks happen they'll use the default network. 5108 // 5109 // TODO: Is there still a race here? We send the broadcast 5110 // after sending the callback, but if the app can receive the 5111 // broadcast before the callback, it might still break. 5112 // 5113 // This *does* introduce a race where if the user uses the new api 5114 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 5115 // they may get old info. Reverse this after the old startUsing api is removed. 5116 // This is on top of the multiple intent sequencing referenced in the todo above. 5117 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 5118 NetworkRequest nr = newNetwork.requestAt(i); 5119 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 5120 // legacy type tracker filters out repeat adds 5121 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 5122 } 5123 } 5124 5125 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 5126 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 5127 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 5128 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 5129 if (newNetwork.isVPN()) { 5130 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 5131 } 5132 } 5133 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 5134 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 5135 if (unneeded(nai, UnneededFor.TEARDOWN)) { 5136 if (nai.getLingerExpiry() > 0) { 5137 // This network has active linger timers and no requests, but is not 5138 // lingering. Linger it. 5139 // 5140 // One way (the only way?) this can happen if this network is unvalidated 5141 // and became unneeded due to another network improving its score to the 5142 // point where this network will no longer be able to satisfy any requests 5143 // even if it validates. 5144 updateLingerState(nai, now); 5145 } else { 5146 if (DBG) log("Reaping " + nai.name()); 5147 teardownUnneededNetwork(nai); 5148 } 5149 } 5150 } 5151 } 5152 } 5153 5154 /** 5155 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 5156 * being disconnected. 5157 * @param changed If only one Network's score or capabilities have been modified since the last 5158 * time this function was called, pass this Network in this argument, otherwise pass 5159 * null. 5160 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 5161 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 5162 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 5163 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 5164 * network's score. 5165 */ 5166 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 5167 // TODO: This may get slow. The "changed" parameter is provided for future optimization 5168 // to avoid the slowness. It is not simply enough to process just "changed", for 5169 // example in the case where "changed"'s score decreases and another network should begin 5170 // satifying a NetworkRequest that "changed" currently satisfies. 5171 5172 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 5173 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 5174 // rematchNetworkAndRequests() handles. 5175 final long now = SystemClock.elapsedRealtime(); 5176 if (changed != null && oldScore < changed.getCurrentScore()) { 5177 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 5178 } else { 5179 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 5180 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 5181 // Rematch higher scoring networks first to prevent requests first matching a lower 5182 // scoring network and then a higher scoring network, which could produce multiple 5183 // callbacks and inadvertently unlinger networks. 5184 Arrays.sort(nais); 5185 for (NetworkAgentInfo nai : nais) { 5186 rematchNetworkAndRequests(nai, 5187 // Only reap the last time through the loop. Reaping before all rematching 5188 // is complete could incorrectly teardown a network that hasn't yet been 5189 // rematched. 5190 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 5191 : ReapUnvalidatedNetworks.REAP, 5192 now); 5193 } 5194 } 5195 } 5196 5197 private void updateInetCondition(NetworkAgentInfo nai) { 5198 // Don't bother updating until we've graduated to validated at least once. 5199 if (!nai.everValidated) return; 5200 // For now only update icons for default connection. 5201 // TODO: Update WiFi and cellular icons separately. b/17237507 5202 if (!isDefaultNetwork(nai)) return; 5203 5204 int newInetCondition = nai.lastValidated ? 100 : 0; 5205 // Don't repeat publish. 5206 if (newInetCondition == mDefaultInetConditionPublished) return; 5207 5208 mDefaultInetConditionPublished = newInetCondition; 5209 sendInetConditionBroadcast(nai.networkInfo); 5210 } 5211 5212 private void notifyLockdownVpn(NetworkAgentInfo nai) { 5213 if (mLockdownTracker != null) { 5214 if (nai != null && nai.isVPN()) { 5215 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 5216 } else { 5217 mLockdownTracker.onNetworkInfoChanged(); 5218 } 5219 } 5220 } 5221 5222 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 5223 NetworkInfo.State state = newInfo.getState(); 5224 NetworkInfo oldInfo = null; 5225 final int oldScore = networkAgent.getCurrentScore(); 5226 synchronized (networkAgent) { 5227 oldInfo = networkAgent.networkInfo; 5228 networkAgent.networkInfo = newInfo; 5229 } 5230 notifyLockdownVpn(networkAgent); 5231 5232 if (oldInfo != null && oldInfo.getState() == state) { 5233 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 5234 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 5235 notifyIfacesChangedForNetworkStats(); 5236 } else if (VDBG) log("ignoring duplicate network state non-change"); 5237 // In either case, no further work should be needed. 5238 return; 5239 } 5240 if (DBG) { 5241 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 5242 (oldInfo == null ? "null" : oldInfo.getState()) + 5243 " to " + state); 5244 } 5245 5246 if (!networkAgent.created 5247 && (state == NetworkInfo.State.CONNECTED 5248 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 5249 5250 // A network that has just connected has zero requests and is thus a foreground network. 5251 networkAgent.networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 5252 5253 try { 5254 // This should never fail. Specifying an already in use NetID will cause failure. 5255 if (networkAgent.isVPN()) { 5256 mNetd.createVirtualNetwork(networkAgent.network.netId, 5257 !networkAgent.linkProperties.getDnsServers().isEmpty(), 5258 (networkAgent.networkMisc == null || 5259 !networkAgent.networkMisc.allowBypass)); 5260 } else { 5261 mNetd.createPhysicalNetwork(networkAgent.network.netId, 5262 networkAgent.networkCapabilities.hasCapability( 5263 NET_CAPABILITY_NOT_RESTRICTED) ? 5264 null : NetworkManagementService.PERMISSION_SYSTEM); 5265 } 5266 } catch (Exception e) { 5267 loge("Error creating network " + networkAgent.network.netId + ": " 5268 + e.getMessage()); 5269 return; 5270 } 5271 networkAgent.created = true; 5272 } 5273 5274 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 5275 networkAgent.everConnected = true; 5276 5277 updateLinkProperties(networkAgent, null); 5278 notifyIfacesChangedForNetworkStats(); 5279 5280 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 5281 scheduleUnvalidatedPrompt(networkAgent); 5282 5283 if (networkAgent.isVPN()) { 5284 // Temporarily disable the default proxy (not global). 5285 synchronized (mProxyLock) { 5286 if (!mDefaultProxyDisabled) { 5287 mDefaultProxyDisabled = true; 5288 if (mGlobalProxy == null && mDefaultProxy != null) { 5289 sendProxyBroadcast(null); 5290 } 5291 } 5292 } 5293 // TODO: support proxy per network. 5294 } 5295 5296 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5297 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5298 // capabilities, so it only needs to be done once on initial connect, not every time the 5299 // network's capabilities change. Note that we do this before rematching the network, 5300 // so we could decide to tear it down immediately afterwards. That's fine though - on 5301 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5302 // doing. 5303 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5304 5305 // Consider network even though it is not yet validated. 5306 final long now = SystemClock.elapsedRealtime(); 5307 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5308 5309 // This has to happen after matching the requests, because callbacks are just requests. 5310 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5311 } else if (state == NetworkInfo.State.DISCONNECTED) { 5312 networkAgent.asyncChannel.disconnect(); 5313 if (networkAgent.isVPN()) { 5314 synchronized (mProxyLock) { 5315 if (mDefaultProxyDisabled) { 5316 mDefaultProxyDisabled = false; 5317 if (mGlobalProxy == null && mDefaultProxy != null) { 5318 sendProxyBroadcast(mDefaultProxy); 5319 } 5320 } 5321 } 5322 } 5323 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5324 state == NetworkInfo.State.SUSPENDED) { 5325 // going into or coming out of SUSPEND: rescore and notify 5326 if (networkAgent.getCurrentScore() != oldScore) { 5327 rematchAllNetworksAndRequests(networkAgent, oldScore); 5328 } 5329 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5330 ConnectivityManager.CALLBACK_SUSPENDED : 5331 ConnectivityManager.CALLBACK_RESUMED)); 5332 mLegacyTypeTracker.update(networkAgent); 5333 } 5334 } 5335 5336 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5337 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5338 if (score < 0) { 5339 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5340 "). Bumping score to min of 0"); 5341 score = 0; 5342 } 5343 5344 final int oldScore = nai.getCurrentScore(); 5345 nai.setCurrentScore(score); 5346 5347 rematchAllNetworksAndRequests(nai, oldScore); 5348 5349 sendUpdatedScoreToFactories(nai); 5350 } 5351 5352 // notify only this one new request of the current state 5353 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5354 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 5355 if (nri.mPendingIntent == null) { 5356 callCallbackForRequest(nri, nai, notifyType, 0); 5357 } else { 5358 sendPendingIntentForRequest(nri, nai, notifyType); 5359 } 5360 } 5361 5362 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5363 // The NetworkInfo we actually send out has no bearing on the real 5364 // state of affairs. For example, if the default connection is mobile, 5365 // and a request for HIPRI has just gone away, we need to pretend that 5366 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5367 // the state to DISCONNECTED, even though the network is of type MOBILE 5368 // and is still connected. 5369 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5370 info.setType(type); 5371 if (state != DetailedState.DISCONNECTED) { 5372 info.setDetailedState(state, null, info.getExtraInfo()); 5373 sendConnectedBroadcast(info); 5374 } else { 5375 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5376 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5377 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5378 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5379 if (info.isFailover()) { 5380 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5381 nai.networkInfo.setFailover(false); 5382 } 5383 if (info.getReason() != null) { 5384 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5385 } 5386 if (info.getExtraInfo() != null) { 5387 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5388 } 5389 NetworkAgentInfo newDefaultAgent = null; 5390 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5391 newDefaultAgent = getDefaultNetwork(); 5392 if (newDefaultAgent != null) { 5393 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5394 newDefaultAgent.networkInfo); 5395 } else { 5396 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5397 } 5398 } 5399 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5400 mDefaultInetConditionPublished); 5401 sendStickyBroadcast(intent); 5402 if (newDefaultAgent != null) { 5403 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5404 } 5405 } 5406 } 5407 5408 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5409 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5410 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5411 NetworkRequest nr = networkAgent.requestAt(i); 5412 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5413 if (VDBG) log(" sending notification for " + nr); 5414 // TODO: if we're in the middle of a rematch, can we send a CAP_CHANGED callback for 5415 // a network that no longer satisfies the listen? 5416 if (nri.mPendingIntent == null) { 5417 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5418 } else { 5419 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5420 } 5421 } 5422 } 5423 5424 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5425 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5426 } 5427 5428 private String notifyTypeToName(int notifyType) { 5429 switch (notifyType) { 5430 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5431 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5432 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5433 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5434 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5435 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5436 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5437 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5438 } 5439 return "UNKNOWN"; 5440 } 5441 5442 /** 5443 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5444 * properties tracked by NetworkStatsService on an active iface has changed. 5445 */ 5446 private void notifyIfacesChangedForNetworkStats() { 5447 try { 5448 mStatsService.forceUpdateIfaces(); 5449 } catch (Exception ignored) { 5450 } 5451 } 5452 5453 @Override 5454 public boolean addVpnAddress(String address, int prefixLength) { 5455 throwIfLockdownEnabled(); 5456 int user = UserHandle.getUserId(Binder.getCallingUid()); 5457 synchronized (mVpns) { 5458 return mVpns.get(user).addAddress(address, prefixLength); 5459 } 5460 } 5461 5462 @Override 5463 public boolean removeVpnAddress(String address, int prefixLength) { 5464 throwIfLockdownEnabled(); 5465 int user = UserHandle.getUserId(Binder.getCallingUid()); 5466 synchronized (mVpns) { 5467 return mVpns.get(user).removeAddress(address, prefixLength); 5468 } 5469 } 5470 5471 @Override 5472 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5473 throwIfLockdownEnabled(); 5474 int user = UserHandle.getUserId(Binder.getCallingUid()); 5475 boolean success; 5476 synchronized (mVpns) { 5477 success = mVpns.get(user).setUnderlyingNetworks(networks); 5478 } 5479 if (success) { 5480 notifyIfacesChangedForNetworkStats(); 5481 } 5482 return success; 5483 } 5484 5485 @Override 5486 public String getCaptivePortalServerUrl() { 5487 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5488 } 5489 5490 @Override 5491 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5492 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5493 enforceKeepalivePermission(); 5494 mKeepaliveTracker.startNattKeepalive( 5495 getNetworkAgentInfoForNetwork(network), 5496 intervalSeconds, messenger, binder, 5497 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5498 } 5499 5500 @Override 5501 public void stopKeepalive(Network network, int slot) { 5502 mHandler.sendMessage(mHandler.obtainMessage( 5503 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5504 } 5505 5506 @Override 5507 public void factoryReset() { 5508 enforceConnectivityInternalPermission(); 5509 5510 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5511 return; 5512 } 5513 5514 final int userId = UserHandle.getCallingUserId(); 5515 5516 // Turn airplane mode off 5517 setAirplaneMode(false); 5518 5519 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5520 // Untether 5521 for (String tether : getTetheredIfaces()) { 5522 untether(tether); 5523 } 5524 } 5525 5526 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5527 // Remove always-on package 5528 synchronized (mVpns) { 5529 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5530 if (alwaysOnPackage != null) { 5531 setAlwaysOnVpnPackage(userId, null, false); 5532 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5533 } 5534 } 5535 5536 // Turn VPN off 5537 VpnConfig vpnConfig = getVpnConfig(userId); 5538 if (vpnConfig != null) { 5539 if (vpnConfig.legacy) { 5540 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5541 } else { 5542 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5543 // in the future without user intervention. 5544 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5545 5546 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5547 } 5548 } 5549 } 5550 5551 Settings.Global.putString(mContext.getContentResolver(), 5552 Settings.Global.NETWORK_AVOID_BAD_WIFI, null); 5553 } 5554 5555 @VisibleForTesting 5556 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5557 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5558 return new NetworkMonitor(context, handler, nai, defaultRequest); 5559 } 5560 5561 @VisibleForTesting 5562 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5563 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5564 } 5565 5566 private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5567 int newNetid = NETID_UNSET; 5568 int prevNetid = NETID_UNSET; 5569 int[] transports = new int[0]; 5570 boolean hadIPv4 = false; 5571 boolean hadIPv6 = false; 5572 5573 if (newNai != null) { 5574 newNetid = newNai.network.netId; 5575 transports = newNai.networkCapabilities.getTransportTypes(); 5576 } 5577 if (prevNai != null) { 5578 prevNetid = prevNai.network.netId; 5579 final LinkProperties lp = prevNai.linkProperties; 5580 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5581 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5582 } 5583 5584 mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); 5585 } 5586 5587 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5588 mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); 5589 } 5590} 5591