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_ETHERNET; 23import static android.net.ConnectivityManager.TYPE_NONE; 24import static android.net.ConnectivityManager.TYPE_VPN; 25import static android.net.ConnectivityManager.getNetworkTypeName; 26import static android.net.ConnectivityManager.isNetworkTypeValid; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_FOREGROUND; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 31import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 32import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 33import static com.android.internal.util.Preconditions.checkNotNull; 34 35import android.annotation.Nullable; 36import android.app.BroadcastOptions; 37import android.app.NotificationManager; 38import android.app.PendingIntent; 39import android.content.BroadcastReceiver; 40import android.content.ContentResolver; 41import android.content.Context; 42import android.content.Intent; 43import android.content.IntentFilter; 44import android.content.res.Configuration; 45import android.database.ContentObserver; 46import android.net.ConnectivityManager; 47import android.net.ConnectivityManager.PacketKeepalive; 48import android.net.IConnectivityManager; 49import android.net.INetworkManagementEventObserver; 50import android.net.INetworkPolicyListener; 51import android.net.INetworkPolicyManager; 52import android.net.INetworkStatsService; 53import android.net.LinkProperties; 54import android.net.LinkProperties.CompareResult; 55import android.net.MatchAllNetworkSpecifier; 56import android.net.Network; 57import android.net.NetworkAgent; 58import android.net.NetworkCapabilities; 59import android.net.NetworkConfig; 60import android.net.NetworkInfo; 61import android.net.NetworkInfo.DetailedState; 62import android.net.NetworkMisc; 63import android.net.NetworkQuotaInfo; 64import android.net.NetworkRequest; 65import android.net.NetworkSpecifier; 66import android.net.NetworkState; 67import android.net.NetworkUtils; 68import android.net.Proxy; 69import android.net.ProxyInfo; 70import android.net.RouteInfo; 71import android.net.UidRange; 72import android.net.Uri; 73import android.net.metrics.DefaultNetworkEvent; 74import android.net.metrics.IpConnectivityLog; 75import android.net.metrics.NetworkEvent; 76import android.net.util.MultinetworkPolicyTracker; 77import android.os.Binder; 78import android.os.Build; 79import android.os.Bundle; 80import android.os.FileUtils; 81import android.os.Handler; 82import android.os.HandlerThread; 83import android.os.IBinder; 84import android.os.INetworkManagementService; 85import android.os.Looper; 86import android.os.Message; 87import android.os.Messenger; 88import android.os.ParcelFileDescriptor; 89import android.os.Parcelable; 90import android.os.PowerManager; 91import android.os.Process; 92import android.os.RemoteException; 93import android.os.ResultReceiver; 94import android.os.ServiceManager; 95import android.os.ServiceSpecificException; 96import android.os.SystemClock; 97import android.os.UserHandle; 98import android.os.UserManager; 99import android.provider.Settings; 100import android.security.Credentials; 101import android.security.KeyStore; 102import android.telephony.TelephonyManager; 103import android.text.TextUtils; 104import android.util.LocalLog; 105import android.util.LocalLog.ReadOnlyLocalLog; 106import android.util.Log; 107import android.util.Slog; 108import android.util.SparseArray; 109import android.util.SparseBooleanArray; 110import android.util.SparseIntArray; 111import android.util.Xml; 112 113import com.android.internal.R; 114import com.android.internal.annotations.GuardedBy; 115import com.android.internal.annotations.VisibleForTesting; 116import com.android.internal.app.IBatteryStats; 117import com.android.internal.net.LegacyVpnInfo; 118import com.android.internal.net.NetworkStatsFactory; 119import com.android.internal.net.VpnConfig; 120import com.android.internal.net.VpnInfo; 121import com.android.internal.net.VpnProfile; 122import com.android.internal.util.AsyncChannel; 123import com.android.internal.util.DumpUtils; 124import com.android.internal.util.IndentingPrintWriter; 125import com.android.internal.util.MessageUtils; 126import com.android.internal.util.WakeupMessage; 127import com.android.internal.util.XmlUtils; 128import com.android.server.am.BatteryStatsService; 129import com.android.server.connectivity.DataConnectionStats; 130import com.android.server.connectivity.KeepaliveTracker; 131import com.android.server.connectivity.LingerMonitor; 132import com.android.server.connectivity.MockableSystemProperties; 133import com.android.server.connectivity.Nat464Xlat; 134import com.android.server.connectivity.NetworkAgentInfo; 135import com.android.server.connectivity.NetworkDiagnostics; 136import com.android.server.connectivity.NetworkMonitor; 137import com.android.server.connectivity.NetworkNotificationManager; 138import com.android.server.connectivity.NetworkNotificationManager.NotificationType; 139import com.android.server.connectivity.PacManager; 140import com.android.server.connectivity.PermissionMonitor; 141import com.android.server.connectivity.Tethering; 142import com.android.server.connectivity.Vpn; 143import com.android.server.connectivity.tethering.TetheringDependencies; 144import com.android.server.net.BaseNetworkObserver; 145import com.android.server.net.LockdownVpnTracker; 146import com.android.server.net.NetworkPolicyManagerInternal; 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 public static final String DIAG_ARG = "--diag"; 182 public static final String SHORT_ARG = "--short"; 183 public static final String TETHERING_ARG = "tethering"; 184 185 private static final boolean DBG = true; 186 private static final boolean VDBG = false; 187 188 private static final boolean LOGD_RULES = false; 189 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 190 191 // TODO: create better separation between radio types and network types 192 193 // how long to wait before switching back to a radio's default network 194 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 195 // system property that can override the above value 196 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 197 "android.telephony.apn-restore"; 198 199 // How long to wait before putting up a "This network doesn't have an Internet connection, 200 // connect anyway?" dialog after the user selects a network that doesn't validate. 201 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 202 203 // Default to 30s linger time-out. Modifiable only for testing. 204 private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; 205 private static final int DEFAULT_LINGER_DELAY_MS = 30_000; 206 @VisibleForTesting 207 protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it. 208 209 // How long to delay to removal of a pending intent based request. 210 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 211 private final int mReleasePendingIntentDelayMs; 212 213 private MockableSystemProperties mSystemProperties; 214 215 private Tethering mTethering; 216 217 private final PermissionMonitor mPermissionMonitor; 218 219 private KeyStore mKeyStore; 220 221 @GuardedBy("mVpns") 222 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 223 224 private boolean mLockdownEnabled; 225 private LockdownVpnTracker mLockdownTracker; 226 227 final private Context mContext; 228 private int mNetworkPreference; 229 // 0 is full bad, 100 is full good 230 private int mDefaultInetConditionPublished = 0; 231 232 private int mNumDnsEntries; 233 234 private boolean mTestMode; 235 private static ConnectivityService sServiceInstance; 236 237 private INetworkManagementService mNetd; 238 private INetworkStatsService mStatsService; 239 private INetworkPolicyManager mPolicyManager; 240 private NetworkPolicyManagerInternal mPolicyManagerInternal; 241 242 private String mCurrentTcpBufferSizes; 243 244 private static final int ENABLED = 1; 245 private static final int DISABLED = 0; 246 247 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 248 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class, 249 NetworkAgentInfo.class }); 250 251 private enum ReapUnvalidatedNetworks { 252 // Tear down networks that have no chance (e.g. even if validated) of becoming 253 // the highest scoring network satisfying a NetworkRequest. This should be passed when 254 // all networks have been rematched against all NetworkRequests. 255 REAP, 256 // Don't reap networks. This should be passed when some networks have not yet been 257 // rematched against all NetworkRequests. 258 DONT_REAP 259 }; 260 261 private enum UnneededFor { 262 LINGER, // Determine whether this network is unneeded and should be lingered. 263 TEARDOWN, // Determine whether this network is unneeded and should be torn down. 264 } 265 266 /** 267 * used internally to change our mobile data enabled flag 268 */ 269 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 270 271 /** 272 * used internally to clear a wakelock when transitioning 273 * from one net to another. Clear happens when we get a new 274 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 275 * after a timeout if no network is found (typically 1 min). 276 */ 277 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 278 279 /** 280 * used internally to reload global proxy settings 281 */ 282 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 283 284 /** 285 * PAC manager has received new port. 286 */ 287 private static final int EVENT_PROXY_HAS_CHANGED = 16; 288 289 /** 290 * used internally when registering NetworkFactories 291 * obj = NetworkFactoryInfo 292 */ 293 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 294 295 /** 296 * used internally when registering NetworkAgents 297 * obj = Messenger 298 */ 299 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 300 301 /** 302 * used to add a network request 303 * includes a NetworkRequestInfo 304 */ 305 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 306 307 /** 308 * indicates a timeout period is over - check if we had a network yet or not 309 * and if not, call the timeout callback (but leave the request live until they 310 * cancel it. 311 * includes a NetworkRequestInfo 312 */ 313 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 314 315 /** 316 * used to add a network listener - no request 317 * includes a NetworkRequestInfo 318 */ 319 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 320 321 /** 322 * used to remove a network request, either a listener or a real request 323 * arg1 = UID of caller 324 * obj = NetworkRequest 325 */ 326 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 327 328 /** 329 * used internally when registering NetworkFactories 330 * obj = Messenger 331 */ 332 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 333 334 /** 335 * used internally to expire a wakelock when transitioning 336 * from one net to another. Expire happens when we fail to find 337 * a new network (typically after 1 minute) - 338 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 339 * a replacement network. 340 */ 341 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 342 343 /** 344 * Used internally to indicate the system is ready. 345 */ 346 private static final int EVENT_SYSTEM_READY = 25; 347 348 /** 349 * used to add a network request with a pending intent 350 * obj = NetworkRequestInfo 351 */ 352 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 353 354 /** 355 * used to remove a pending intent and its associated network request. 356 * arg1 = UID of caller 357 * obj = PendingIntent 358 */ 359 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 360 361 /** 362 * used to specify whether a network should be used even if unvalidated. 363 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 364 * arg2 = whether to remember this choice in the future (1 or 0) 365 * obj = network 366 */ 367 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 368 369 /** 370 * used to ask the user to confirm a connection to an unvalidated network. 371 * obj = network 372 */ 373 private static final int EVENT_PROMPT_UNVALIDATED = 29; 374 375 /** 376 * used internally to (re)configure mobile data always-on settings. 377 */ 378 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 379 380 /** 381 * used to add a network listener with a pending intent 382 * obj = NetworkRequestInfo 383 */ 384 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 385 386 /** 387 * used to specify whether a network should not be penalized when it becomes unvalidated. 388 */ 389 private static final int EVENT_SET_AVOID_UNVALIDATED = 35; 390 391 /** 392 * used to trigger revalidation of a network. 393 */ 394 private static final int EVENT_REVALIDATE_NETWORK = 36; 395 396 private static String eventName(int what) { 397 return sMagicDecoderRing.get(what, Integer.toString(what)); 398 } 399 400 /** Handler thread used for both of the handlers below. */ 401 @VisibleForTesting 402 protected final HandlerThread mHandlerThread; 403 /** Handler used for internal events. */ 404 final private InternalHandler mHandler; 405 /** Handler used for incoming {@link NetworkStateTracker} events. */ 406 final private NetworkStateTrackerHandler mTrackerHandler; 407 408 private boolean mSystemReady; 409 private Intent mInitialBroadcast; 410 411 private PowerManager.WakeLock mNetTransitionWakeLock; 412 private int mNetTransitionWakeLockTimeout; 413 private final PowerManager.WakeLock mPendingIntentWakeLock; 414 415 // track the current default http proxy - tell the world if we get a new one (real change) 416 private volatile ProxyInfo mDefaultProxy = null; 417 private Object mProxyLock = new Object(); 418 private boolean mDefaultProxyDisabled = false; 419 420 // track the global proxy. 421 private ProxyInfo mGlobalProxy = null; 422 423 private PacManager mPacManager = null; 424 425 final private SettingsObserver mSettingsObserver; 426 427 private UserManager mUserManager; 428 429 NetworkConfig[] mNetConfigs; 430 int mNetworksDefined; 431 432 // the set of network types that can only be enabled by system/sig apps 433 List mProtectedNetworks; 434 435 private DataConnectionStats mDataConnectionStats; 436 437 TelephonyManager mTelephonyManager; 438 439 private KeepaliveTracker mKeepaliveTracker; 440 private NetworkNotificationManager mNotifier; 441 private LingerMonitor mLingerMonitor; 442 443 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 444 private final static int MIN_NET_ID = 100; // some reserved marks 445 private final static int MAX_NET_ID = 65535; 446 private int mNextNetId = MIN_NET_ID; 447 448 // sequence number of NetworkRequests 449 private int mNextNetworkRequestId = 1; 450 451 // NetworkRequest activity String log entries. 452 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 453 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 454 455 // NetworkInfo blocked and unblocked String log entries 456 private static final int MAX_NETWORK_INFO_LOGS = 40; 457 private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); 458 459 private static final int MAX_WAKELOCK_LOGS = 20; 460 private final LocalLog mWakelockLogs = new LocalLog(MAX_WAKELOCK_LOGS); 461 private int mTotalWakelockAcquisitions = 0; 462 private int mTotalWakelockReleases = 0; 463 private long mTotalWakelockDurationMs = 0; 464 private long mMaxWakelockDurationMs = 0; 465 private long mLastWakeLockAcquireTimestamp = 0; 466 467 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 468 private static final int MAX_VALIDATION_LOGS = 10; 469 private static class ValidationLog { 470 final Network mNetwork; 471 final String mNetworkExtraInfo; 472 final ReadOnlyLocalLog mLog; 473 474 ValidationLog(Network network, String networkExtraInfo, ReadOnlyLocalLog log) { 475 mNetwork = network; 476 mNetworkExtraInfo = networkExtraInfo; 477 mLog = log; 478 } 479 } 480 private final ArrayDeque<ValidationLog> mValidationLogs = 481 new ArrayDeque<ValidationLog>(MAX_VALIDATION_LOGS); 482 483 private void addValidationLogs(ReadOnlyLocalLog log, Network network, String networkExtraInfo) { 484 synchronized (mValidationLogs) { 485 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 486 mValidationLogs.removeLast(); 487 } 488 mValidationLogs.addFirst(new ValidationLog(network, networkExtraInfo, log)); 489 } 490 } 491 492 private final IpConnectivityLog mMetricsLog; 493 494 @VisibleForTesting 495 final MultinetworkPolicyTracker mMultinetworkPolicyTracker; 496 497 /** 498 * Implements support for the legacy "one network per network type" model. 499 * 500 * We used to have a static array of NetworkStateTrackers, one for each 501 * network type, but that doesn't work any more now that we can have, 502 * for example, more that one wifi network. This class stores all the 503 * NetworkAgentInfo objects that support a given type, but the legacy 504 * API will only see the first one. 505 * 506 * It serves two main purposes: 507 * 508 * 1. Provide information about "the network for a given type" (since this 509 * API only supports one). 510 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 511 * the first network for a given type changes, or if the default network 512 * changes. 513 */ 514 private class LegacyTypeTracker { 515 516 private static final boolean DBG = true; 517 private static final boolean VDBG = false; 518 519 /** 520 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 521 * Each list holds references to all NetworkAgentInfos that are used to 522 * satisfy requests for that network type. 523 * 524 * This array is built out at startup such that an unsupported network 525 * doesn't get an ArrayList instance, making this a tristate: 526 * unsupported, supported but not active and active. 527 * 528 * The actual lists are populated when we scan the network types that 529 * are supported on this device. 530 * 531 * Threading model: 532 * - addSupportedType() is only called in the constructor 533 * - add(), update(), remove() are only called from the ConnectivityService handler thread. 534 * They are therefore not thread-safe with respect to each other. 535 * - getNetworkForType() can be called at any time on binder threads. It is synchronized 536 * on mTypeLists to be thread-safe with respect to a concurrent remove call. 537 * - dump is thread-safe with respect to concurrent add and remove calls. 538 */ 539 private final ArrayList<NetworkAgentInfo> mTypeLists[]; 540 541 public LegacyTypeTracker() { 542 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 543 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 544 } 545 546 public void addSupportedType(int type) { 547 if (mTypeLists[type] != null) { 548 throw new IllegalStateException( 549 "legacy list for type " + type + "already initialized"); 550 } 551 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 552 } 553 554 public boolean isTypeSupported(int type) { 555 return isNetworkTypeValid(type) && mTypeLists[type] != null; 556 } 557 558 public NetworkAgentInfo getNetworkForType(int type) { 559 synchronized (mTypeLists) { 560 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 561 return mTypeLists[type].get(0); 562 } 563 } 564 return null; 565 } 566 567 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 568 boolean isDefaultNetwork) { 569 if (DBG) { 570 log("Sending " + state + 571 " broadcast for type " + type + " " + nai.name() + 572 " isDefaultNetwork=" + isDefaultNetwork); 573 } 574 } 575 576 /** Adds the given network to the specified legacy type list. */ 577 public void add(int type, NetworkAgentInfo nai) { 578 if (!isTypeSupported(type)) { 579 return; // Invalid network type. 580 } 581 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 582 583 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 584 if (list.contains(nai)) { 585 return; 586 } 587 synchronized (mTypeLists) { 588 list.add(nai); 589 } 590 591 // Send a broadcast if this is the first network of its type or if it's the default. 592 final boolean isDefaultNetwork = isDefaultNetwork(nai); 593 if ((list.size() == 1) || isDefaultNetwork) { 594 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 595 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 596 } 597 } 598 599 /** Removes the given network from the specified legacy type list. */ 600 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 601 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 602 if (list == null || list.isEmpty()) { 603 return; 604 } 605 final boolean wasFirstNetwork = list.get(0).equals(nai); 606 607 synchronized (mTypeLists) { 608 if (!list.remove(nai)) { 609 return; 610 } 611 } 612 613 final DetailedState state = DetailedState.DISCONNECTED; 614 615 if (wasFirstNetwork || wasDefault) { 616 maybeLogBroadcast(nai, state, type, wasDefault); 617 sendLegacyNetworkBroadcast(nai, state, type); 618 } 619 620 if (!list.isEmpty() && wasFirstNetwork) { 621 if (DBG) log("Other network available for type " + type + 622 ", sending connected broadcast"); 623 final NetworkAgentInfo replacement = list.get(0); 624 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 625 sendLegacyNetworkBroadcast(replacement, state, type); 626 } 627 } 628 629 /** Removes the given network from all legacy type lists. */ 630 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 631 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 632 for (int type = 0; type < mTypeLists.length; type++) { 633 remove(type, nai, wasDefault); 634 } 635 } 636 637 // send out another legacy broadcast - currently only used for suspend/unsuspend 638 // toggle 639 public void update(NetworkAgentInfo nai) { 640 final boolean isDefault = isDefaultNetwork(nai); 641 final DetailedState state = nai.networkInfo.getDetailedState(); 642 for (int type = 0; type < mTypeLists.length; type++) { 643 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 644 final boolean contains = (list != null && list.contains(nai)); 645 final boolean isFirst = contains && (nai == list.get(0)); 646 if (isFirst || contains && isDefault) { 647 maybeLogBroadcast(nai, state, type, isDefault); 648 sendLegacyNetworkBroadcast(nai, state, type); 649 } 650 } 651 } 652 653 private String naiToString(NetworkAgentInfo nai) { 654 String name = (nai != null) ? nai.name() : "null"; 655 String state = (nai.networkInfo != null) ? 656 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 657 "???/???"; 658 return name + " " + state; 659 } 660 661 public void dump(IndentingPrintWriter pw) { 662 pw.println("mLegacyTypeTracker:"); 663 pw.increaseIndent(); 664 pw.print("Supported types:"); 665 for (int type = 0; type < mTypeLists.length; type++) { 666 if (mTypeLists[type] != null) pw.print(" " + type); 667 } 668 pw.println(); 669 pw.println("Current state:"); 670 pw.increaseIndent(); 671 synchronized (mTypeLists) { 672 for (int type = 0; type < mTypeLists.length; type++) { 673 if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; 674 for (NetworkAgentInfo nai : mTypeLists[type]) { 675 pw.println(type + " " + naiToString(nai)); 676 } 677 } 678 } 679 pw.decreaseIndent(); 680 pw.decreaseIndent(); 681 pw.println(); 682 } 683 } 684 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 685 686 public ConnectivityService(Context context, INetworkManagementService netManager, 687 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 688 this(context, netManager, statsService, policyManager, new IpConnectivityLog()); 689 } 690 691 @VisibleForTesting 692 protected ConnectivityService(Context context, INetworkManagementService netManager, 693 INetworkStatsService statsService, INetworkPolicyManager policyManager, 694 IpConnectivityLog logger) { 695 if (DBG) log("ConnectivityService starting up"); 696 697 mSystemProperties = getSystemProperties(); 698 699 mMetricsLog = logger; 700 mDefaultRequest = createInternetRequestForTransport(-1, NetworkRequest.Type.REQUEST); 701 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); 702 mNetworkRequests.put(mDefaultRequest, defaultNRI); 703 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 704 705 mDefaultMobileDataRequest = createInternetRequestForTransport( 706 NetworkCapabilities.TRANSPORT_CELLULAR, NetworkRequest.Type.BACKGROUND_REQUEST); 707 708 mHandlerThread = new HandlerThread("ConnectivityServiceThread"); 709 mHandlerThread.start(); 710 mHandler = new InternalHandler(mHandlerThread.getLooper()); 711 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 712 713 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 714 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 715 716 mLingerDelayMs = mSystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); 717 718 mContext = checkNotNull(context, "missing Context"); 719 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 720 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 721 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 722 mPolicyManagerInternal = checkNotNull( 723 LocalServices.getService(NetworkPolicyManagerInternal.class), 724 "missing NetworkPolicyManagerInternal"); 725 726 mKeyStore = KeyStore.getInstance(); 727 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 728 729 try { 730 mPolicyManager.registerListener(mPolicyListener); 731 } catch (RemoteException e) { 732 // ouch, no rules updates means some processes may never get network 733 loge("unable to register INetworkPolicyListener" + e); 734 } 735 736 final PowerManager powerManager = (PowerManager) context.getSystemService( 737 Context.POWER_SERVICE); 738 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 739 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 740 com.android.internal.R.integer.config_networkTransitionTimeout); 741 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 742 743 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 744 745 // TODO: What is the "correct" way to do determine if this is a wifi only device? 746 boolean wifiOnly = mSystemProperties.getBoolean("ro.radio.noril", false); 747 log("wifiOnly=" + wifiOnly); 748 String[] naStrings = context.getResources().getStringArray( 749 com.android.internal.R.array.networkAttributes); 750 for (String naString : naStrings) { 751 try { 752 NetworkConfig n = new NetworkConfig(naString); 753 if (VDBG) log("naString=" + naString + " config=" + n); 754 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 755 loge("Error in networkAttributes - ignoring attempt to define type " + 756 n.type); 757 continue; 758 } 759 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 760 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 761 n.type); 762 continue; 763 } 764 if (mNetConfigs[n.type] != null) { 765 loge("Error in networkAttributes - ignoring attempt to redefine type " + 766 n.type); 767 continue; 768 } 769 mLegacyTypeTracker.addSupportedType(n.type); 770 771 mNetConfigs[n.type] = n; 772 mNetworksDefined++; 773 } catch(Exception e) { 774 // ignore it - leave the entry null 775 } 776 } 777 778 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 779 if (mNetConfigs[TYPE_VPN] == null) { 780 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 781 // don't need to add TYPE_VPN to mNetConfigs. 782 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 783 mNetworksDefined++; // used only in the log() statement below. 784 } 785 786 // Do the same for Ethernet, since it's often not specified in the configs, although many 787 // devices can use it via USB host adapters. 788 if (mNetConfigs[TYPE_ETHERNET] == null && hasService(Context.ETHERNET_SERVICE)) { 789 mLegacyTypeTracker.addSupportedType(TYPE_ETHERNET); 790 mNetworksDefined++; 791 } 792 793 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 794 795 mProtectedNetworks = new ArrayList<Integer>(); 796 int[] protectedNetworks = context.getResources().getIntArray( 797 com.android.internal.R.array.config_protectedNetworks); 798 for (int p : protectedNetworks) { 799 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 800 mProtectedNetworks.add(p); 801 } else { 802 if (DBG) loge("Ignoring protectedNetwork " + p); 803 } 804 } 805 806 mTestMode = mSystemProperties.get("cm.test.mode").equals("true") 807 && mSystemProperties.get("ro.build.type").equals("eng"); 808 809 mTethering = makeTethering(); 810 811 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 812 813 //set up the listener for user state for creating user VPNs 814 IntentFilter intentFilter = new IntentFilter(); 815 intentFilter.addAction(Intent.ACTION_USER_STARTED); 816 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 817 intentFilter.addAction(Intent.ACTION_USER_ADDED); 818 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 819 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 820 mContext.registerReceiverAsUser( 821 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 822 mContext.registerReceiverAsUser(mUserPresentReceiver, UserHandle.SYSTEM, 823 new IntentFilter(Intent.ACTION_USER_PRESENT), null, null); 824 825 try { 826 mNetd.registerObserver(mTethering); 827 mNetd.registerObserver(mDataActivityObserver); 828 } catch (RemoteException e) { 829 loge("Error registering observer :" + e); 830 } 831 832 mSettingsObserver = new SettingsObserver(mContext, mHandler); 833 registerSettingsCallbacks(); 834 835 mDataConnectionStats = new DataConnectionStats(mContext); 836 mDataConnectionStats.startMonitoring(); 837 838 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 839 840 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 841 842 mKeepaliveTracker = new KeepaliveTracker(mHandler); 843 mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager, 844 mContext.getSystemService(NotificationManager.class)); 845 846 final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(), 847 Settings.Global.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT, 848 LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT); 849 final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(), 850 Settings.Global.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS, 851 LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS); 852 mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit); 853 854 mMultinetworkPolicyTracker = createMultinetworkPolicyTracker( 855 mContext, mHandler, () -> rematchForAvoidBadWifiUpdate()); 856 mMultinetworkPolicyTracker.start(); 857 } 858 859 private Tethering makeTethering() { 860 // TODO: Move other elements into @Overridden getters. 861 final TetheringDependencies deps = new TetheringDependencies(); 862 return new Tethering(mContext, mNetd, mStatsService, mPolicyManager, 863 IoThread.get().getLooper(), new MockableSystemProperties(), 864 deps); 865 } 866 867 private NetworkRequest createInternetRequestForTransport( 868 int transportType, NetworkRequest.Type type) { 869 NetworkCapabilities netCap = new NetworkCapabilities(); 870 netCap.addCapability(NET_CAPABILITY_INTERNET); 871 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 872 if (transportType > -1) { 873 netCap.addTransportType(transportType); 874 } 875 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type); 876 } 877 878 // Used only for testing. 879 // TODO: Delete this and either: 880 // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires 881 // changing ContentResolver to make registerContentObserver non-final). 882 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 883 // by subclassing SettingsObserver. 884 @VisibleForTesting 885 void updateMobileDataAlwaysOn() { 886 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 887 } 888 889 private void handleMobileDataAlwaysOn() { 890 final boolean enable = toBool(Settings.Global.getInt( 891 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 1)); 892 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 893 if (enable == isEnabled) { 894 return; // Nothing to do. 895 } 896 897 if (enable) { 898 handleRegisterNetworkRequest(new NetworkRequestInfo( 899 null, mDefaultMobileDataRequest, new Binder())); 900 } else { 901 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 902 } 903 } 904 905 private void registerSettingsCallbacks() { 906 // Watch for global HTTP proxy changes. 907 mSettingsObserver.observe( 908 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 909 EVENT_APPLY_GLOBAL_HTTP_PROXY); 910 911 // Watch for whether or not to keep mobile data always on. 912 mSettingsObserver.observe( 913 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 914 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 915 } 916 917 private synchronized int nextNetworkRequestId() { 918 return mNextNetworkRequestId++; 919 } 920 921 @VisibleForTesting 922 protected int reserveNetId() { 923 synchronized (mNetworkForNetId) { 924 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 925 int netId = mNextNetId; 926 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 927 // Make sure NetID unused. http://b/16815182 928 if (!mNetIdInUse.get(netId)) { 929 mNetIdInUse.put(netId, true); 930 return netId; 931 } 932 } 933 } 934 throw new IllegalStateException("No free netIds"); 935 } 936 937 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 938 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 939 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 940 final NetworkState state; 941 if (nai != null) { 942 state = nai.getNetworkState(); 943 state.networkInfo.setType(networkType); 944 } else { 945 final NetworkInfo info = new NetworkInfo(networkType, 0, 946 getNetworkTypeName(networkType), ""); 947 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 948 info.setIsAvailable(true); 949 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 950 null, null, null); 951 } 952 filterNetworkStateForUid(state, uid, ignoreBlocked); 953 return state; 954 } else { 955 return NetworkState.EMPTY; 956 } 957 } 958 959 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 960 if (network == null) { 961 return null; 962 } 963 synchronized (mNetworkForNetId) { 964 return mNetworkForNetId.get(network.netId); 965 } 966 } 967 968 private Network[] getVpnUnderlyingNetworks(int uid) { 969 if (!mLockdownEnabled) { 970 int user = UserHandle.getUserId(uid); 971 synchronized (mVpns) { 972 Vpn vpn = mVpns.get(user); 973 if (vpn != null && vpn.appliesToUid(uid)) { 974 return vpn.getUnderlyingNetworks(); 975 } 976 } 977 } 978 return null; 979 } 980 981 private NetworkState getUnfilteredActiveNetworkState(int uid) { 982 NetworkAgentInfo nai = getDefaultNetwork(); 983 984 final Network[] networks = getVpnUnderlyingNetworks(uid); 985 if (networks != null) { 986 // getUnderlyingNetworks() returns: 987 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 988 // empty array => the VPN explicitly said "no default network". 989 // non-empty array => the VPN specified one or more default networks; we use the 990 // first one. 991 if (networks.length > 0) { 992 nai = getNetworkAgentInfoForNetwork(networks[0]); 993 } else { 994 nai = null; 995 } 996 } 997 998 if (nai != null) { 999 return nai.getNetworkState(); 1000 } else { 1001 return NetworkState.EMPTY; 1002 } 1003 } 1004 1005 /** 1006 * Check if UID should be blocked from using the network with the given LinkProperties. 1007 */ 1008 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 1009 boolean ignoreBlocked) { 1010 // Networks aren't blocked when ignoring blocked status 1011 if (ignoreBlocked) { 1012 return false; 1013 } 1014 // Networks are never blocked for system services 1015 // TODO: consider moving this check to NetworkPolicyManagerInternal.isUidNetworkingBlocked. 1016 if (isSystem(uid)) { 1017 return false; 1018 } 1019 synchronized (mVpns) { 1020 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 1021 if (vpn != null && vpn.isBlockingUid(uid)) { 1022 return true; 1023 } 1024 } 1025 final String iface = (lp == null ? "" : lp.getInterfaceName()); 1026 return mPolicyManagerInternal.isUidNetworkingBlocked(uid, iface); 1027 } 1028 1029 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1030 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1031 return; 1032 } 1033 final boolean blocked; 1034 synchronized (mBlockedAppUids) { 1035 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1036 blocked = true; 1037 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1038 blocked = false; 1039 } else { 1040 return; 1041 } 1042 } 1043 String action = blocked ? "BLOCKED" : "UNBLOCKED"; 1044 log(String.format("Returning %s NetworkInfo to uid=%d", action, uid)); 1045 mNetworkInfoBlockingLogs.log(action + " " + uid); 1046 } 1047 1048 /** 1049 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1050 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1051 * on {@link #isNetworkWithLinkPropertiesBlocked}. 1052 */ 1053 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1054 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1055 1056 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1057 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1058 } 1059 if (mLockdownTracker != null) { 1060 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1061 } 1062 } 1063 1064 /** 1065 * Return NetworkInfo for the active (i.e., connected) network interface. 1066 * It is assumed that at most one network is active at a time. If more 1067 * than one is active, it is indeterminate which will be returned. 1068 * @return the info for the active network, or {@code null} if none is 1069 * active 1070 */ 1071 @Override 1072 public NetworkInfo getActiveNetworkInfo() { 1073 enforceAccessPermission(); 1074 final int uid = Binder.getCallingUid(); 1075 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1076 filterNetworkStateForUid(state, uid, false); 1077 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1078 return state.networkInfo; 1079 } 1080 1081 @Override 1082 public Network getActiveNetwork() { 1083 enforceAccessPermission(); 1084 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1085 } 1086 1087 @Override 1088 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1089 enforceConnectivityInternalPermission(); 1090 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1091 } 1092 1093 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1094 final int user = UserHandle.getUserId(uid); 1095 int vpnNetId = NETID_UNSET; 1096 synchronized (mVpns) { 1097 final Vpn vpn = mVpns.get(user); 1098 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1099 } 1100 NetworkAgentInfo nai; 1101 if (vpnNetId != NETID_UNSET) { 1102 synchronized (mNetworkForNetId) { 1103 nai = mNetworkForNetId.get(vpnNetId); 1104 } 1105 if (nai != null) return nai.network; 1106 } 1107 nai = getDefaultNetwork(); 1108 if (nai != null 1109 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1110 nai = null; 1111 } 1112 return nai != null ? nai.network : null; 1113 } 1114 1115 // Public because it's used by mLockdownTracker. 1116 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1117 enforceAccessPermission(); 1118 final int uid = Binder.getCallingUid(); 1119 NetworkState state = getUnfilteredActiveNetworkState(uid); 1120 return state.networkInfo; 1121 } 1122 1123 @Override 1124 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1125 enforceConnectivityInternalPermission(); 1126 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1127 filterNetworkStateForUid(state, uid, ignoreBlocked); 1128 return state.networkInfo; 1129 } 1130 1131 @Override 1132 public NetworkInfo getNetworkInfo(int networkType) { 1133 enforceAccessPermission(); 1134 final int uid = Binder.getCallingUid(); 1135 if (getVpnUnderlyingNetworks(uid) != null) { 1136 // A VPN is active, so we may need to return one of its underlying networks. This 1137 // information is not available in LegacyTypeTracker, so we have to get it from 1138 // getUnfilteredActiveNetworkState. 1139 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1140 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1141 filterNetworkStateForUid(state, uid, false); 1142 return state.networkInfo; 1143 } 1144 } 1145 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1146 return state.networkInfo; 1147 } 1148 1149 @Override 1150 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1151 enforceAccessPermission(); 1152 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1153 if (nai != null) { 1154 final NetworkState state = nai.getNetworkState(); 1155 filterNetworkStateForUid(state, uid, ignoreBlocked); 1156 return state.networkInfo; 1157 } else { 1158 return null; 1159 } 1160 } 1161 1162 @Override 1163 public NetworkInfo[] getAllNetworkInfo() { 1164 enforceAccessPermission(); 1165 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1166 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1167 networkType++) { 1168 NetworkInfo info = getNetworkInfo(networkType); 1169 if (info != null) { 1170 result.add(info); 1171 } 1172 } 1173 return result.toArray(new NetworkInfo[result.size()]); 1174 } 1175 1176 @Override 1177 public Network getNetworkForType(int networkType) { 1178 enforceAccessPermission(); 1179 final int uid = Binder.getCallingUid(); 1180 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1181 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1182 return state.network; 1183 } 1184 return null; 1185 } 1186 1187 @Override 1188 public Network[] getAllNetworks() { 1189 enforceAccessPermission(); 1190 synchronized (mNetworkForNetId) { 1191 final Network[] result = new Network[mNetworkForNetId.size()]; 1192 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1193 result[i] = mNetworkForNetId.valueAt(i).network; 1194 } 1195 return result; 1196 } 1197 } 1198 1199 @Override 1200 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1201 // The basic principle is: if an app's traffic could possibly go over a 1202 // network, without the app doing anything multinetwork-specific, 1203 // (hence, by "default"), then include that network's capabilities in 1204 // the array. 1205 // 1206 // In the normal case, app traffic only goes over the system's default 1207 // network connection, so that's the only network returned. 1208 // 1209 // With a VPN in force, some app traffic may go into the VPN, and thus 1210 // over whatever underlying networks the VPN specifies, while other app 1211 // traffic may go over the system default network (e.g.: a split-tunnel 1212 // VPN, or an app disallowed by the VPN), so the set of networks 1213 // returned includes the VPN's underlying networks and the system 1214 // default. 1215 enforceAccessPermission(); 1216 1217 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1218 1219 NetworkAgentInfo nai = getDefaultNetwork(); 1220 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1221 if (nc != null) { 1222 result.put(nai.network, nc); 1223 } 1224 1225 if (!mLockdownEnabled) { 1226 synchronized (mVpns) { 1227 Vpn vpn = mVpns.get(userId); 1228 if (vpn != null) { 1229 Network[] networks = vpn.getUnderlyingNetworks(); 1230 if (networks != null) { 1231 for (Network network : networks) { 1232 nai = getNetworkAgentInfoForNetwork(network); 1233 nc = getNetworkCapabilitiesInternal(nai); 1234 if (nc != null) { 1235 result.put(network, nc); 1236 } 1237 } 1238 } 1239 } 1240 } 1241 } 1242 1243 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1244 out = result.values().toArray(out); 1245 return out; 1246 } 1247 1248 @Override 1249 public boolean isNetworkSupported(int networkType) { 1250 enforceAccessPermission(); 1251 return mLegacyTypeTracker.isTypeSupported(networkType); 1252 } 1253 1254 /** 1255 * Return LinkProperties for the active (i.e., connected) default 1256 * network interface. It is assumed that at most one default network 1257 * is active at a time. If more than one is active, it is indeterminate 1258 * which will be returned. 1259 * @return the ip properties for the active network, or {@code null} if 1260 * none is active 1261 */ 1262 @Override 1263 public LinkProperties getActiveLinkProperties() { 1264 enforceAccessPermission(); 1265 final int uid = Binder.getCallingUid(); 1266 NetworkState state = getUnfilteredActiveNetworkState(uid); 1267 return state.linkProperties; 1268 } 1269 1270 @Override 1271 public LinkProperties getLinkPropertiesForType(int networkType) { 1272 enforceAccessPermission(); 1273 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1274 if (nai != null) { 1275 synchronized (nai) { 1276 return new LinkProperties(nai.linkProperties); 1277 } 1278 } 1279 return null; 1280 } 1281 1282 // TODO - this should be ALL networks 1283 @Override 1284 public LinkProperties getLinkProperties(Network network) { 1285 enforceAccessPermission(); 1286 return getLinkProperties(getNetworkAgentInfoForNetwork(network)); 1287 } 1288 1289 private LinkProperties getLinkProperties(NetworkAgentInfo nai) { 1290 if (nai == null) { 1291 return null; 1292 } 1293 synchronized (nai) { 1294 return new LinkProperties(nai.linkProperties); 1295 } 1296 } 1297 1298 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1299 if (nai != null) { 1300 synchronized (nai) { 1301 if (nai.networkCapabilities != null) { 1302 return new NetworkCapabilities(nai.networkCapabilities); 1303 } 1304 } 1305 } 1306 return null; 1307 } 1308 1309 @Override 1310 public NetworkCapabilities getNetworkCapabilities(Network network) { 1311 enforceAccessPermission(); 1312 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1313 } 1314 1315 @Override 1316 public NetworkState[] getAllNetworkState() { 1317 // Require internal since we're handing out IMSI details 1318 enforceConnectivityInternalPermission(); 1319 1320 final ArrayList<NetworkState> result = Lists.newArrayList(); 1321 for (Network network : getAllNetworks()) { 1322 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1323 if (nai != null) { 1324 result.add(nai.getNetworkState()); 1325 } 1326 } 1327 return result.toArray(new NetworkState[result.size()]); 1328 } 1329 1330 @Override 1331 @Deprecated 1332 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1333 Log.w(TAG, "Shame on UID " + Binder.getCallingUid() 1334 + " for calling the hidden API getNetworkQuotaInfo(). Shame!"); 1335 return new NetworkQuotaInfo(); 1336 } 1337 1338 @Override 1339 public boolean isActiveNetworkMetered() { 1340 enforceAccessPermission(); 1341 1342 final int uid = Binder.getCallingUid(); 1343 final NetworkCapabilities caps = getUnfilteredActiveNetworkState(uid).networkCapabilities; 1344 if (caps != null) { 1345 return !caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED); 1346 } else { 1347 // Always return the most conservative value 1348 return true; 1349 } 1350 } 1351 1352 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1353 @Override 1354 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1355 int deviceType = Integer.parseInt(label); 1356 sendDataActivityBroadcast(deviceType, active, tsNanos); 1357 } 1358 }; 1359 1360 /** 1361 * Ensure that a network route exists to deliver traffic to the specified 1362 * host via the specified network interface. 1363 * @param networkType the type of the network over which traffic to the 1364 * specified host is to be routed 1365 * @param hostAddress the IP address of the host to which the route is 1366 * desired 1367 * @return {@code true} on success, {@code false} on failure 1368 */ 1369 @Override 1370 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1371 enforceChangePermission(); 1372 if (mProtectedNetworks.contains(networkType)) { 1373 enforceConnectivityInternalPermission(); 1374 } 1375 1376 InetAddress addr; 1377 try { 1378 addr = InetAddress.getByAddress(hostAddress); 1379 } catch (UnknownHostException e) { 1380 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1381 return false; 1382 } 1383 1384 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1385 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1386 return false; 1387 } 1388 1389 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1390 if (nai == null) { 1391 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1392 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1393 } else { 1394 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1395 } 1396 return false; 1397 } 1398 1399 DetailedState netState; 1400 synchronized (nai) { 1401 netState = nai.networkInfo.getDetailedState(); 1402 } 1403 1404 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1405 if (VDBG) { 1406 log("requestRouteToHostAddress on down network " 1407 + "(" + networkType + ") - dropped" 1408 + " netState=" + netState); 1409 } 1410 return false; 1411 } 1412 1413 final int uid = Binder.getCallingUid(); 1414 final long token = Binder.clearCallingIdentity(); 1415 try { 1416 LinkProperties lp; 1417 int netId; 1418 synchronized (nai) { 1419 lp = nai.linkProperties; 1420 netId = nai.network.netId; 1421 } 1422 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1423 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1424 return ok; 1425 } finally { 1426 Binder.restoreCallingIdentity(token); 1427 } 1428 } 1429 1430 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1431 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1432 if (bestRoute == null) { 1433 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1434 } else { 1435 String iface = bestRoute.getInterface(); 1436 if (bestRoute.getGateway().equals(addr)) { 1437 // if there is no better route, add the implied hostroute for our gateway 1438 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1439 } else { 1440 // if we will connect to this through another route, add a direct route 1441 // to it's gateway 1442 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1443 } 1444 } 1445 if (DBG) log("Adding legacy route " + bestRoute + 1446 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1447 try { 1448 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1449 } catch (Exception e) { 1450 // never crash - catch them all 1451 if (DBG) loge("Exception trying to add a route: " + e); 1452 return false; 1453 } 1454 return true; 1455 } 1456 1457 private final INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1458 @Override 1459 public void onUidRulesChanged(int uid, int uidRules) { 1460 // TODO: notify UID when it has requested targeted updates 1461 } 1462 @Override 1463 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1464 } 1465 @Override 1466 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1467 // TODO: relocate this specific callback in Tethering. 1468 if (restrictBackground) { 1469 log("onRestrictBackgroundChanged(true): disabling tethering"); 1470 mTethering.untetherAll(); 1471 } 1472 } 1473 @Override 1474 public void onUidPoliciesChanged(int uid, int uidPolicies) { 1475 } 1476 }; 1477 1478 /** 1479 * Require that the caller is either in the same user or has appropriate permission to interact 1480 * across users. 1481 * 1482 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1483 */ 1484 private void enforceCrossUserPermission(int userId) { 1485 if (userId == UserHandle.getCallingUserId()) { 1486 // Not a cross-user call. 1487 return; 1488 } 1489 mContext.enforceCallingOrSelfPermission( 1490 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1491 "ConnectivityService"); 1492 } 1493 1494 private void enforceInternetPermission() { 1495 mContext.enforceCallingOrSelfPermission( 1496 android.Manifest.permission.INTERNET, 1497 "ConnectivityService"); 1498 } 1499 1500 private void enforceAccessPermission() { 1501 mContext.enforceCallingOrSelfPermission( 1502 android.Manifest.permission.ACCESS_NETWORK_STATE, 1503 "ConnectivityService"); 1504 } 1505 1506 private void enforceChangePermission() { 1507 ConnectivityManager.enforceChangePermission(mContext); 1508 } 1509 1510 private void enforceSettingsPermission() { 1511 mContext.enforceCallingOrSelfPermission( 1512 android.Manifest.permission.NETWORK_SETTINGS, 1513 "ConnectivityService"); 1514 } 1515 1516 private void enforceTetherAccessPermission() { 1517 mContext.enforceCallingOrSelfPermission( 1518 android.Manifest.permission.ACCESS_NETWORK_STATE, 1519 "ConnectivityService"); 1520 } 1521 1522 private void enforceConnectivityInternalPermission() { 1523 mContext.enforceCallingOrSelfPermission( 1524 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1525 "ConnectivityService"); 1526 } 1527 1528 private void enforceConnectivityRestrictedNetworksPermission() { 1529 try { 1530 mContext.enforceCallingOrSelfPermission( 1531 android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, 1532 "ConnectivityService"); 1533 return; 1534 } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } 1535 enforceConnectivityInternalPermission(); 1536 } 1537 1538 private void enforceKeepalivePermission() { 1539 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1540 } 1541 1542 // Public because it's used by mLockdownTracker. 1543 public void sendConnectedBroadcast(NetworkInfo info) { 1544 enforceConnectivityInternalPermission(); 1545 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1546 } 1547 1548 private void sendInetConditionBroadcast(NetworkInfo info) { 1549 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1550 } 1551 1552 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1553 if (mLockdownTracker != null) { 1554 info = new NetworkInfo(info); 1555 mLockdownTracker.augmentNetworkInfo(info); 1556 } 1557 1558 Intent intent = new Intent(bcastType); 1559 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1560 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1561 if (info.isFailover()) { 1562 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1563 info.setFailover(false); 1564 } 1565 if (info.getReason() != null) { 1566 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1567 } 1568 if (info.getExtraInfo() != null) { 1569 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1570 info.getExtraInfo()); 1571 } 1572 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1573 return intent; 1574 } 1575 1576 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1577 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1578 } 1579 1580 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1581 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1582 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1583 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1584 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1585 final long ident = Binder.clearCallingIdentity(); 1586 try { 1587 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1588 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1589 } finally { 1590 Binder.restoreCallingIdentity(ident); 1591 } 1592 } 1593 1594 private void sendStickyBroadcast(Intent intent) { 1595 synchronized (this) { 1596 if (!mSystemReady) { 1597 mInitialBroadcast = new Intent(intent); 1598 } 1599 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1600 if (VDBG) { 1601 log("sendStickyBroadcast: action=" + intent.getAction()); 1602 } 1603 1604 Bundle options = null; 1605 final long ident = Binder.clearCallingIdentity(); 1606 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1607 final NetworkInfo ni = intent.getParcelableExtra( 1608 ConnectivityManager.EXTRA_NETWORK_INFO); 1609 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1610 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1611 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1612 } else { 1613 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1614 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1615 options = opts.toBundle(); 1616 } 1617 final IBatteryStats bs = BatteryStatsService.getService(); 1618 try { 1619 bs.noteConnectivityChanged(intent.getIntExtra( 1620 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1621 ni != null ? ni.getState().toString() : "?"); 1622 } catch (RemoteException e) { 1623 } 1624 } 1625 try { 1626 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1627 } finally { 1628 Binder.restoreCallingIdentity(ident); 1629 } 1630 } 1631 } 1632 1633 void systemReady() { 1634 loadGlobalProxy(); 1635 1636 synchronized (this) { 1637 mSystemReady = true; 1638 if (mInitialBroadcast != null) { 1639 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1640 mInitialBroadcast = null; 1641 } 1642 } 1643 // load the global proxy at startup 1644 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1645 1646 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1647 // for user to unlock device too. 1648 updateLockdownVpn(); 1649 1650 // Configure whether mobile data is always on. 1651 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1652 1653 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1654 1655 mPermissionMonitor.startMonitoring(); 1656 } 1657 1658 /** 1659 * Setup data activity tracking for the given network. 1660 * 1661 * Every {@code setupDataActivityTracking} should be paired with a 1662 * {@link #removeDataActivityTracking} for cleanup. 1663 */ 1664 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1665 final String iface = networkAgent.linkProperties.getInterfaceName(); 1666 1667 final int timeout; 1668 int type = ConnectivityManager.TYPE_NONE; 1669 1670 if (networkAgent.networkCapabilities.hasTransport( 1671 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1672 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1673 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1674 10); 1675 type = ConnectivityManager.TYPE_MOBILE; 1676 } else if (networkAgent.networkCapabilities.hasTransport( 1677 NetworkCapabilities.TRANSPORT_WIFI)) { 1678 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1679 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1680 15); 1681 type = ConnectivityManager.TYPE_WIFI; 1682 } else { 1683 // do not track any other networks 1684 timeout = 0; 1685 } 1686 1687 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1688 try { 1689 mNetd.addIdleTimer(iface, timeout, type); 1690 } catch (Exception e) { 1691 // You shall not crash! 1692 loge("Exception in setupDataActivityTracking " + e); 1693 } 1694 } 1695 } 1696 1697 /** 1698 * Remove data activity tracking when network disconnects. 1699 */ 1700 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1701 final String iface = networkAgent.linkProperties.getInterfaceName(); 1702 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1703 1704 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1705 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1706 try { 1707 // the call fails silently if no idletimer setup for this interface 1708 mNetd.removeIdleTimer(iface); 1709 } catch (Exception e) { 1710 loge("Exception in removeDataActivityTracking " + e); 1711 } 1712 } 1713 } 1714 1715 /** 1716 * Reads the network specific MTU size from reources. 1717 * and set it on it's iface. 1718 */ 1719 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1720 final String iface = newLp.getInterfaceName(); 1721 final int mtu = newLp.getMtu(); 1722 if (oldLp == null && mtu == 0) { 1723 // Silently ignore unset MTU value. 1724 return; 1725 } 1726 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1727 if (VDBG) log("identical MTU - not setting"); 1728 return; 1729 } 1730 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1731 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1732 return; 1733 } 1734 1735 // Cannot set MTU without interface name 1736 if (TextUtils.isEmpty(iface)) { 1737 loge("Setting MTU size with null iface."); 1738 return; 1739 } 1740 1741 try { 1742 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1743 mNetd.setMtu(iface, mtu); 1744 } catch (Exception e) { 1745 Slog.e(TAG, "exception in setMtu()" + e); 1746 } 1747 } 1748 1749 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1750 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1751 1752 // Overridden for testing purposes to avoid writing to SystemProperties. 1753 @VisibleForTesting 1754 protected MockableSystemProperties getSystemProperties() { 1755 return new MockableSystemProperties(); 1756 } 1757 1758 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1759 if (isDefaultNetwork(nai) == false) { 1760 return; 1761 } 1762 1763 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1764 String[] values = null; 1765 if (tcpBufferSizes != null) { 1766 values = tcpBufferSizes.split(","); 1767 } 1768 1769 if (values == null || values.length != 6) { 1770 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1771 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1772 values = tcpBufferSizes.split(","); 1773 } 1774 1775 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1776 1777 try { 1778 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1779 1780 final String prefix = "/sys/kernel/ipv4/tcp_"; 1781 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1782 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1783 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1784 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1785 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1786 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1787 mCurrentTcpBufferSizes = tcpBufferSizes; 1788 } catch (IOException e) { 1789 loge("Can't set TCP buffer sizes:" + e); 1790 } 1791 1792 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1793 Settings.Global.TCP_DEFAULT_INIT_RWND, 1794 mSystemProperties.getInt("net.tcp.default_init_rwnd", 0)); 1795 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1796 if (rwndValue != 0) { 1797 mSystemProperties.set(sysctlKey, rwndValue.toString()); 1798 } 1799 } 1800 1801 private void flushVmDnsCache() { 1802 /* 1803 * Tell the VMs to toss their DNS caches 1804 */ 1805 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1806 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1807 /* 1808 * Connectivity events can happen before boot has completed ... 1809 */ 1810 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1811 final long ident = Binder.clearCallingIdentity(); 1812 try { 1813 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1814 } finally { 1815 Binder.restoreCallingIdentity(ident); 1816 } 1817 } 1818 1819 @Override 1820 public int getRestoreDefaultNetworkDelay(int networkType) { 1821 String restoreDefaultNetworkDelayStr = mSystemProperties.get( 1822 NETWORK_RESTORE_DELAY_PROP_NAME); 1823 if(restoreDefaultNetworkDelayStr != null && 1824 restoreDefaultNetworkDelayStr.length() != 0) { 1825 try { 1826 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1827 } catch (NumberFormatException e) { 1828 } 1829 } 1830 // if the system property isn't set, use the value for the apn type 1831 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1832 1833 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1834 (mNetConfigs[networkType] != null)) { 1835 ret = mNetConfigs[networkType].restoreTime; 1836 } 1837 return ret; 1838 } 1839 1840 private boolean argsContain(String[] args, String target) { 1841 for (String arg : args) { 1842 if (target.equals(arg)) return true; 1843 } 1844 return false; 1845 } 1846 1847 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1848 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1849 final long DIAG_TIME_MS = 5000; 1850 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1851 // Start gathering diagnostic information. 1852 netDiags.add(new NetworkDiagnostics( 1853 nai.network, 1854 new LinkProperties(nai.linkProperties), // Must be a copy. 1855 DIAG_TIME_MS)); 1856 } 1857 1858 for (NetworkDiagnostics netDiag : netDiags) { 1859 pw.println(); 1860 netDiag.waitForMeasurements(); 1861 netDiag.dump(pw); 1862 } 1863 } 1864 1865 @Override 1866 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1867 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1868 if (!DumpUtils.checkDumpPermission(mContext, TAG, pw)) return; 1869 1870 if (argsContain(args, DIAG_ARG)) { 1871 dumpNetworkDiagnostics(pw); 1872 return; 1873 } else if (argsContain(args, TETHERING_ARG)) { 1874 mTethering.dump(fd, pw, args); 1875 return; 1876 } 1877 1878 pw.print("NetworkFactories for:"); 1879 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1880 pw.print(" " + nfi.name); 1881 } 1882 pw.println(); 1883 pw.println(); 1884 1885 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1886 pw.print("Active default network: "); 1887 if (defaultNai == null) { 1888 pw.println("none"); 1889 } else { 1890 pw.println(defaultNai.network.netId); 1891 } 1892 pw.println(); 1893 1894 pw.println("Current Networks:"); 1895 pw.increaseIndent(); 1896 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1897 pw.println(nai.toString()); 1898 pw.increaseIndent(); 1899 pw.println(String.format( 1900 "Requests: REQUEST:%d LISTEN:%d BACKGROUND_REQUEST:%d total:%d", 1901 nai.numForegroundNetworkRequests(), 1902 nai.numNetworkRequests() - nai.numRequestNetworkRequests(), 1903 nai.numBackgroundNetworkRequests(), 1904 nai.numNetworkRequests())); 1905 pw.increaseIndent(); 1906 for (int i = 0; i < nai.numNetworkRequests(); i++) { 1907 pw.println(nai.requestAt(i).toString()); 1908 } 1909 pw.decreaseIndent(); 1910 pw.println("Lingered:"); 1911 pw.increaseIndent(); 1912 nai.dumpLingerTimers(pw); 1913 pw.decreaseIndent(); 1914 pw.decreaseIndent(); 1915 } 1916 pw.decreaseIndent(); 1917 pw.println(); 1918 1919 pw.println("Network Requests:"); 1920 pw.increaseIndent(); 1921 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1922 pw.println(nri.toString()); 1923 } 1924 pw.println(); 1925 pw.decreaseIndent(); 1926 1927 mLegacyTypeTracker.dump(pw); 1928 1929 pw.println(); 1930 mTethering.dump(fd, pw, args); 1931 1932 pw.println(); 1933 mKeepaliveTracker.dump(pw); 1934 1935 pw.println(); 1936 dumpAvoidBadWifiSettings(pw); 1937 1938 if (argsContain(args, SHORT_ARG) == false) { 1939 pw.println(); 1940 synchronized (mValidationLogs) { 1941 pw.println("mValidationLogs (most recent first):"); 1942 for (ValidationLog p : mValidationLogs) { 1943 pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); 1944 pw.increaseIndent(); 1945 p.mLog.dump(fd, pw, args); 1946 pw.decreaseIndent(); 1947 } 1948 } 1949 1950 pw.println(); 1951 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1952 pw.increaseIndent(); 1953 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1954 pw.decreaseIndent(); 1955 1956 pw.println(); 1957 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 1958 pw.increaseIndent(); 1959 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 1960 pw.decreaseIndent(); 1961 1962 pw.println(); 1963 pw.println("NetTransition WakeLock activity (most recent first):"); 1964 pw.increaseIndent(); 1965 pw.println("total acquisitions: " + mTotalWakelockAcquisitions); 1966 pw.println("total releases: " + mTotalWakelockReleases); 1967 pw.println("cumulative duration: " + (mTotalWakelockDurationMs / 1000) + "s"); 1968 pw.println("longest duration: " + (mMaxWakelockDurationMs / 1000) + "s"); 1969 if (mTotalWakelockAcquisitions > mTotalWakelockReleases) { 1970 long duration = SystemClock.elapsedRealtime() - mLastWakeLockAcquireTimestamp; 1971 pw.println("currently holding WakeLock for: " + (duration / 1000) + "s"); 1972 } 1973 mWakelockLogs.reverseDump(fd, pw, args); 1974 pw.decreaseIndent(); 1975 } 1976 } 1977 1978 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 1979 if (nai.network == null) return false; 1980 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1981 if (officialNai != null && officialNai.equals(nai)) return true; 1982 if (officialNai != null || VDBG) { 1983 loge(eventName(what) + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1984 " - " + nai); 1985 } 1986 return false; 1987 } 1988 1989 // must be stateless - things change under us. 1990 private class NetworkStateTrackerHandler extends Handler { 1991 public NetworkStateTrackerHandler(Looper looper) { 1992 super(looper); 1993 } 1994 1995 private boolean maybeHandleAsyncChannelMessage(Message msg) { 1996 switch (msg.what) { 1997 default: 1998 return false; 1999 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2000 handleAsyncChannelHalfConnect(msg); 2001 break; 2002 } 2003 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2004 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2005 if (nai != null) nai.asyncChannel.disconnect(); 2006 break; 2007 } 2008 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2009 handleAsyncChannelDisconnected(msg); 2010 break; 2011 } 2012 } 2013 return true; 2014 } 2015 2016 private void maybeHandleNetworkAgentMessage(Message msg) { 2017 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2018 if (nai == null) { 2019 if (VDBG) { 2020 log(String.format("%s from unknown NetworkAgent", eventName(msg.what))); 2021 } 2022 return; 2023 } 2024 2025 switch (msg.what) { 2026 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2027 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2028 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2029 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED) || 2030 networkCapabilities.hasCapability(NET_CAPABILITY_FOREGROUND)) { 2031 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2032 } 2033 updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities); 2034 break; 2035 } 2036 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2037 handleUpdateLinkProperties(nai, (LinkProperties) msg.obj); 2038 break; 2039 } 2040 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2041 NetworkInfo info = (NetworkInfo) msg.obj; 2042 updateNetworkInfo(nai, info); 2043 break; 2044 } 2045 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2046 Integer score = (Integer) msg.obj; 2047 if (score != null) updateNetworkScore(nai, score.intValue()); 2048 break; 2049 } 2050 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2051 try { 2052 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2053 } catch (Exception e) { 2054 // Never crash! 2055 loge("Exception in addVpnUidRanges: " + e); 2056 } 2057 break; 2058 } 2059 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2060 try { 2061 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2062 } catch (Exception e) { 2063 // Never crash! 2064 loge("Exception in removeVpnUidRanges: " + e); 2065 } 2066 break; 2067 } 2068 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2069 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2070 loge("ERROR: already-connected network explicitly selected."); 2071 } 2072 nai.networkMisc.explicitlySelected = true; 2073 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2074 break; 2075 } 2076 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2077 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2078 break; 2079 } 2080 } 2081 } 2082 2083 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2084 switch (msg.what) { 2085 default: 2086 return false; 2087 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2088 final NetworkAgentInfo nai; 2089 synchronized (mNetworkForNetId) { 2090 nai = mNetworkForNetId.get(msg.arg2); 2091 } 2092 if (nai != null) { 2093 final boolean valid = 2094 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2095 final boolean wasValidated = nai.lastValidated; 2096 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2097 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2098 if (valid != nai.lastValidated) { 2099 final int oldScore = nai.getCurrentScore(); 2100 nai.lastValidated = valid; 2101 nai.everValidated |= valid; 2102 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2103 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2104 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2105 } 2106 updateInetCondition(nai); 2107 // Let the NetworkAgent know the state of its network 2108 Bundle redirectUrlBundle = new Bundle(); 2109 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2110 nai.asyncChannel.sendMessage( 2111 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2112 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2113 0, redirectUrlBundle); 2114 if (wasValidated && !nai.lastValidated) { 2115 handleNetworkUnvalidated(nai); 2116 } 2117 } 2118 break; 2119 } 2120 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2121 final int netId = msg.arg2; 2122 final boolean visible = toBool(msg.arg1); 2123 final NetworkAgentInfo nai; 2124 synchronized (mNetworkForNetId) { 2125 nai = mNetworkForNetId.get(netId); 2126 } 2127 // If captive portal status has changed, update capabilities or disconnect. 2128 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2129 final int oldScore = nai.getCurrentScore(); 2130 nai.lastCaptivePortalDetected = visible; 2131 nai.everCaptivePortalDetected |= visible; 2132 if (nai.lastCaptivePortalDetected && 2133 Settings.Global.CAPTIVE_PORTAL_MODE_AVOID == getCaptivePortalMode()) { 2134 if (DBG) log("Avoiding captive portal network: " + nai.name()); 2135 nai.asyncChannel.sendMessage( 2136 NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2137 teardownUnneededNetwork(nai); 2138 break; 2139 } 2140 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2141 } 2142 if (!visible) { 2143 mNotifier.clearNotification(netId); 2144 } else { 2145 if (nai == null) { 2146 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2147 break; 2148 } 2149 if (!nai.networkMisc.provisioningNotificationDisabled) { 2150 mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null, 2151 (PendingIntent) msg.obj, nai.networkMisc.explicitlySelected); 2152 } 2153 } 2154 break; 2155 } 2156 } 2157 return true; 2158 } 2159 2160 private int getCaptivePortalMode() { 2161 return Settings.Global.getInt(mContext.getContentResolver(), 2162 Settings.Global.CAPTIVE_PORTAL_MODE, 2163 Settings.Global.CAPTIVE_PORTAL_MODE_PROMPT); 2164 } 2165 2166 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2167 switch (msg.what) { 2168 default: 2169 return false; 2170 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2171 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2172 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2173 handleLingerComplete(nai); 2174 } 2175 break; 2176 } 2177 } 2178 return true; 2179 } 2180 2181 @Override 2182 public void handleMessage(Message msg) { 2183 if (!maybeHandleAsyncChannelMessage(msg) && 2184 !maybeHandleNetworkMonitorMessage(msg) && 2185 !maybeHandleNetworkAgentInfoMessage(msg)) { 2186 maybeHandleNetworkAgentMessage(msg); 2187 } 2188 } 2189 } 2190 2191 private void updateLingerState(NetworkAgentInfo nai, long now) { 2192 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2193 // 2. If the network was lingering and there are now requests, unlinger it. 2194 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2195 // one lingered request, start lingering. 2196 nai.updateLingerTimer(); 2197 if (nai.isLingering() && nai.numForegroundNetworkRequests() > 0) { 2198 if (DBG) log("Unlingering " + nai.name()); 2199 nai.unlinger(); 2200 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2201 } else if (unneeded(nai, UnneededFor.LINGER) && nai.getLingerExpiry() > 0) { 2202 int lingerTime = (int) (nai.getLingerExpiry() - now); 2203 if (DBG) log("Lingering " + nai.name() + " for " + lingerTime + "ms"); 2204 nai.linger(); 2205 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2206 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2207 } 2208 } 2209 2210 private void handleAsyncChannelHalfConnect(Message msg) { 2211 AsyncChannel ac = (AsyncChannel) msg.obj; 2212 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2213 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2214 if (VDBG) log("NetworkFactory connected"); 2215 // A network factory has connected. Send it all current NetworkRequests. 2216 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2217 if (nri.request.isListen()) continue; 2218 NetworkAgentInfo nai = getNetworkForRequest(nri.request.requestId); 2219 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2220 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2221 } 2222 } else { 2223 loge("Error connecting NetworkFactory"); 2224 mNetworkFactoryInfos.remove(msg.obj); 2225 } 2226 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2227 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2228 if (VDBG) log("NetworkAgent connected"); 2229 // A network agent has requested a connection. Establish the connection. 2230 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2231 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2232 } else { 2233 loge("Error connecting NetworkAgent"); 2234 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2235 if (nai != null) { 2236 final boolean wasDefault = isDefaultNetwork(nai); 2237 synchronized (mNetworkForNetId) { 2238 mNetworkForNetId.remove(nai.network.netId); 2239 mNetIdInUse.delete(nai.network.netId); 2240 } 2241 // Just in case. 2242 mLegacyTypeTracker.remove(nai, wasDefault); 2243 } 2244 } 2245 } 2246 } 2247 2248 private void handleAsyncChannelDisconnected(Message msg) { 2249 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2250 if (nai != null) { 2251 if (DBG) { 2252 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2253 } 2254 // A network agent has disconnected. 2255 // TODO - if we move the logic to the network agent (have them disconnect 2256 // because they lost all their requests or because their score isn't good) 2257 // then they would disconnect organically, report their new state and then 2258 // disconnect the channel. 2259 if (nai.networkInfo.isConnected()) { 2260 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2261 null, null); 2262 } 2263 final boolean wasDefault = isDefaultNetwork(nai); 2264 if (wasDefault) { 2265 mDefaultInetConditionPublished = 0; 2266 // Log default network disconnection before required book-keeping. 2267 // Let rematchAllNetworksAndRequests() below record a new default network event 2268 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2269 // whose timestamps tell how long it takes to recover a default network. 2270 logDefaultNetworkEvent(null, nai); 2271 } 2272 notifyIfacesChangedForNetworkStats(); 2273 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2274 // by other networks that are already connected. Perhaps that can be done by 2275 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2276 // of rematchAllNetworksAndRequests 2277 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2278 mKeepaliveTracker.handleStopAllKeepalives(nai, 2279 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2280 for (String iface : nai.linkProperties.getAllInterfaceNames()) { 2281 // Disable wakeup packet monitoring for each interface. 2282 wakeupModifyInterface(iface, nai.networkCapabilities, false); 2283 } 2284 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2285 mNetworkAgentInfos.remove(msg.replyTo); 2286 nai.maybeStopClat(); 2287 synchronized (mNetworkForNetId) { 2288 // Remove the NetworkAgent, but don't mark the netId as 2289 // available until we've told netd to delete it below. 2290 mNetworkForNetId.remove(nai.network.netId); 2291 } 2292 // Remove all previously satisfied requests. 2293 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2294 NetworkRequest request = nai.requestAt(i); 2295 NetworkAgentInfo currentNetwork = getNetworkForRequest(request.requestId); 2296 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2297 clearNetworkForRequest(request.requestId); 2298 sendUpdatedScoreToFactories(request, 0); 2299 } 2300 } 2301 nai.clearLingerState(); 2302 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2303 removeDataActivityTracking(nai); 2304 notifyLockdownVpn(nai); 2305 ensureNetworkTransitionWakelock(nai.name()); 2306 } 2307 mLegacyTypeTracker.remove(nai, wasDefault); 2308 rematchAllNetworksAndRequests(null, 0); 2309 mLingerMonitor.noteDisconnect(nai); 2310 if (nai.created) { 2311 // Tell netd to clean up the configuration for this network 2312 // (routing rules, DNS, etc). 2313 // This may be slow as it requires a lot of netd shelling out to ip and 2314 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2315 // after we've rematched networks with requests which should make a potential 2316 // fallback network the default or requested a new network from the 2317 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2318 // long time. 2319 try { 2320 mNetd.removeNetwork(nai.network.netId); 2321 } catch (Exception e) { 2322 loge("Exception removing network: " + e); 2323 } 2324 } 2325 synchronized (mNetworkForNetId) { 2326 mNetIdInUse.delete(nai.network.netId); 2327 } 2328 } else { 2329 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2330 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2331 } 2332 } 2333 2334 // If this method proves to be too slow then we can maintain a separate 2335 // pendingIntent => NetworkRequestInfo map. 2336 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2337 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2338 Intent intent = pendingIntent.getIntent(); 2339 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2340 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2341 if (existingPendingIntent != null && 2342 existingPendingIntent.getIntent().filterEquals(intent)) { 2343 return entry.getValue(); 2344 } 2345 } 2346 return null; 2347 } 2348 2349 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2350 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2351 2352 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2353 if (existingRequest != null) { // remove the existing request. 2354 if (DBG) log("Replacing " + existingRequest.request + " with " 2355 + nri.request + " because their intents matched."); 2356 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2357 } 2358 handleRegisterNetworkRequest(nri); 2359 } 2360 2361 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2362 mNetworkRequests.put(nri.request, nri); 2363 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2364 if (nri.request.isListen()) { 2365 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2366 if (nri.request.networkCapabilities.hasSignalStrength() && 2367 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2368 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2369 } 2370 } 2371 } 2372 rematchAllNetworksAndRequests(null, 0); 2373 if (nri.request.isRequest() && getNetworkForRequest(nri.request.requestId) == null) { 2374 sendUpdatedScoreToFactories(nri.request, 0); 2375 } 2376 } 2377 2378 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2379 int callingUid) { 2380 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2381 if (nri != null) { 2382 handleReleaseNetworkRequest(nri.request, callingUid); 2383 } 2384 } 2385 2386 // Determines whether the network is the best (or could become the best, if it validated), for 2387 // none of a particular type of NetworkRequests. The type of NetworkRequests considered depends 2388 // on the value of reason: 2389 // 2390 // - UnneededFor.TEARDOWN: non-listen NetworkRequests. If a network is unneeded for this reason, 2391 // then it should be torn down. 2392 // - UnneededFor.LINGER: foreground NetworkRequests. If a network is unneeded for this reason, 2393 // then it should be lingered. 2394 private boolean unneeded(NetworkAgentInfo nai, UnneededFor reason) { 2395 final int numRequests; 2396 switch (reason) { 2397 case TEARDOWN: 2398 numRequests = nai.numRequestNetworkRequests(); 2399 break; 2400 case LINGER: 2401 numRequests = nai.numForegroundNetworkRequests(); 2402 break; 2403 default: 2404 Slog.wtf(TAG, "Invalid reason. Cannot happen."); 2405 return true; 2406 } 2407 2408 if (!nai.everConnected || nai.isVPN() || nai.isLingering() || numRequests > 0) { 2409 return false; 2410 } 2411 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2412 if (reason == UnneededFor.LINGER && nri.request.isBackgroundRequest()) { 2413 // Background requests don't affect lingering. 2414 continue; 2415 } 2416 2417 // If this Network is already the highest scoring Network for a request, or if 2418 // there is hope for it to become one if it validated, then it is needed. 2419 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2420 (nai.isSatisfyingRequest(nri.request.requestId) || 2421 // Note that this catches two important cases: 2422 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2423 // is currently satisfying the request. This is desirable when 2424 // cellular ends up validating but WiFi does not. 2425 // 2. Unvalidated WiFi will not be reaped when validated cellular 2426 // is currently satisfying the request. This is desirable when 2427 // WiFi ends up validating and out scoring cellular. 2428 getNetworkForRequest(nri.request.requestId).getCurrentScore() < 2429 nai.getCurrentScoreAsValidated())) { 2430 return false; 2431 } 2432 } 2433 return true; 2434 } 2435 2436 private NetworkRequestInfo getNriForAppRequest( 2437 NetworkRequest request, int callingUid, String requestedOperation) { 2438 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2439 2440 if (nri != null) { 2441 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2442 log(String.format("UID %d attempted to %s for unowned request %s", 2443 callingUid, requestedOperation, nri)); 2444 return null; 2445 } 2446 } 2447 2448 return nri; 2449 } 2450 2451 private void handleTimedOutNetworkRequest(final NetworkRequestInfo nri) { 2452 if (mNetworkRequests.get(nri.request) == null) { 2453 return; 2454 } 2455 if (getNetworkForRequest(nri.request.requestId) != null) { 2456 return; 2457 } 2458 if (VDBG || (DBG && nri.request.isRequest())) { 2459 log("releasing " + nri.request + " (timeout)"); 2460 } 2461 handleRemoveNetworkRequest(nri); 2462 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_UNAVAIL, 0); 2463 } 2464 2465 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2466 final NetworkRequestInfo nri = 2467 getNriForAppRequest(request, callingUid, "release NetworkRequest"); 2468 if (nri == null) { 2469 return; 2470 } 2471 if (VDBG || (DBG && nri.request.isRequest())) { 2472 log("releasing " + nri.request + " (release request)"); 2473 } 2474 handleRemoveNetworkRequest(nri); 2475 } 2476 2477 private void handleRemoveNetworkRequest(final NetworkRequestInfo nri) { 2478 nri.unlinkDeathRecipient(); 2479 mNetworkRequests.remove(nri.request); 2480 synchronized (mUidToNetworkRequestCount) { 2481 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2482 if (requests < 1) { 2483 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2484 nri.mUid); 2485 } else if (requests == 1) { 2486 mUidToNetworkRequestCount.removeAt( 2487 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2488 } else { 2489 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2490 } 2491 } 2492 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2493 if (nri.request.isRequest()) { 2494 boolean wasKept = false; 2495 NetworkAgentInfo nai = getNetworkForRequest(nri.request.requestId); 2496 if (nai != null) { 2497 boolean wasBackgroundNetwork = nai.isBackgroundNetwork(); 2498 nai.removeRequest(nri.request.requestId); 2499 if (VDBG) { 2500 log(" Removing from current network " + nai.name() + 2501 ", leaving " + nai.numNetworkRequests() + " requests."); 2502 } 2503 // If there are still lingered requests on this network, don't tear it down, 2504 // but resume lingering instead. 2505 updateLingerState(nai, SystemClock.elapsedRealtime()); 2506 if (unneeded(nai, UnneededFor.TEARDOWN)) { 2507 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2508 teardownUnneededNetwork(nai); 2509 } else { 2510 wasKept = true; 2511 } 2512 clearNetworkForRequest(nri.request.requestId); 2513 if (!wasBackgroundNetwork && nai.isBackgroundNetwork()) { 2514 // Went from foreground to background. 2515 updateCapabilities(nai.getCurrentScore(), nai, nai.networkCapabilities); 2516 } 2517 } 2518 2519 // TODO: remove this code once we know that the Slog.wtf is never hit. 2520 // 2521 // Find all networks that are satisfying this request and remove the request 2522 // from their request lists. 2523 // TODO - it's my understanding that for a request there is only a single 2524 // network satisfying it, so this loop is wasteful 2525 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2526 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2527 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2528 otherNai.name() + ", but mNetworkAgentInfos says " + 2529 (nai != null ? nai.name() : "null")); 2530 } 2531 } 2532 2533 // Maintain the illusion. When this request arrived, we might have pretended 2534 // that a network connected to serve it, even though the network was already 2535 // connected. Now that this request has gone away, we might have to pretend 2536 // that the network disconnected. LegacyTypeTracker will generate that 2537 // phantom disconnect for this type. 2538 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2539 boolean doRemove = true; 2540 if (wasKept) { 2541 // check if any of the remaining requests for this network are for the 2542 // same legacy type - if so, don't remove the nai 2543 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2544 NetworkRequest otherRequest = nai.requestAt(i); 2545 if (otherRequest.legacyType == nri.request.legacyType && 2546 otherRequest.isRequest()) { 2547 if (DBG) log(" still have other legacy request - leaving"); 2548 doRemove = false; 2549 } 2550 } 2551 } 2552 2553 if (doRemove) { 2554 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2555 } 2556 } 2557 2558 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2559 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2560 nri.request); 2561 } 2562 } else { 2563 // listens don't have a singular affectedNetwork. Check all networks to see 2564 // if this listen request applies and remove it. 2565 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2566 nai.removeRequest(nri.request.requestId); 2567 if (nri.request.networkCapabilities.hasSignalStrength() && 2568 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2569 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2570 } 2571 } 2572 } 2573 } 2574 2575 @Override 2576 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2577 enforceConnectivityInternalPermission(); 2578 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2579 encodeBool(accept), encodeBool(always), network)); 2580 } 2581 2582 @Override 2583 public void setAvoidUnvalidated(Network network) { 2584 enforceConnectivityInternalPermission(); 2585 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_AVOID_UNVALIDATED, network)); 2586 } 2587 2588 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2589 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2590 " accept=" + accept + " always=" + always); 2591 2592 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2593 if (nai == null) { 2594 // Nothing to do. 2595 return; 2596 } 2597 2598 if (nai.everValidated) { 2599 // The network validated while the dialog box was up. Take no action. 2600 return; 2601 } 2602 2603 if (!nai.networkMisc.explicitlySelected) { 2604 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2605 } 2606 2607 if (accept != nai.networkMisc.acceptUnvalidated) { 2608 int oldScore = nai.getCurrentScore(); 2609 nai.networkMisc.acceptUnvalidated = accept; 2610 rematchAllNetworksAndRequests(nai, oldScore); 2611 sendUpdatedScoreToFactories(nai); 2612 } 2613 2614 if (always) { 2615 nai.asyncChannel.sendMessage( 2616 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, encodeBool(accept)); 2617 } 2618 2619 if (!accept) { 2620 // Tell the NetworkAgent to not automatically reconnect to the network. 2621 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2622 // Teardown the nework. 2623 teardownUnneededNetwork(nai); 2624 } 2625 2626 } 2627 2628 private void handleSetAvoidUnvalidated(Network network) { 2629 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2630 if (nai == null || nai.lastValidated) { 2631 // Nothing to do. The network either disconnected or revalidated. 2632 return; 2633 } 2634 if (!nai.avoidUnvalidated) { 2635 int oldScore = nai.getCurrentScore(); 2636 nai.avoidUnvalidated = true; 2637 rematchAllNetworksAndRequests(nai, oldScore); 2638 sendUpdatedScoreToFactories(nai); 2639 } 2640 } 2641 2642 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2643 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2644 mHandler.sendMessageDelayed( 2645 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2646 PROMPT_UNVALIDATED_DELAY_MS); 2647 } 2648 2649 @Override 2650 public void startCaptivePortalApp(Network network) { 2651 enforceConnectivityInternalPermission(); 2652 mHandler.post(() -> { 2653 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2654 if (nai == null) return; 2655 if (!nai.networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL)) return; 2656 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_LAUNCH_CAPTIVE_PORTAL_APP); 2657 }); 2658 } 2659 2660 public boolean avoidBadWifi() { 2661 return mMultinetworkPolicyTracker.getAvoidBadWifi(); 2662 } 2663 2664 private void rematchForAvoidBadWifiUpdate() { 2665 rematchAllNetworksAndRequests(null, 0); 2666 for (NetworkAgentInfo nai: mNetworkAgentInfos.values()) { 2667 if (nai.networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) { 2668 sendUpdatedScoreToFactories(nai); 2669 } 2670 } 2671 } 2672 2673 // TODO: Evaluate whether this is of interest to other consumers of 2674 // MultinetworkPolicyTracker and worth moving out of here. 2675 private void dumpAvoidBadWifiSettings(IndentingPrintWriter pw) { 2676 final boolean configRestrict = mMultinetworkPolicyTracker.configRestrictsAvoidBadWifi(); 2677 if (!configRestrict) { 2678 pw.println("Bad Wi-Fi avoidance: unrestricted"); 2679 return; 2680 } 2681 2682 pw.println("Bad Wi-Fi avoidance: " + avoidBadWifi()); 2683 pw.increaseIndent(); 2684 pw.println("Config restrict: " + configRestrict); 2685 2686 final String value = mMultinetworkPolicyTracker.getAvoidBadWifiSetting(); 2687 String description; 2688 // Can't use a switch statement because strings are legal case labels, but null is not. 2689 if ("0".equals(value)) { 2690 description = "get stuck"; 2691 } else if (value == null) { 2692 description = "prompt"; 2693 } else if ("1".equals(value)) { 2694 description = "avoid"; 2695 } else { 2696 description = value + " (?)"; 2697 } 2698 pw.println("User setting: " + description); 2699 pw.println("Network overrides:"); 2700 pw.increaseIndent(); 2701 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2702 if (nai.avoidUnvalidated) { 2703 pw.println(nai.name()); 2704 } 2705 } 2706 pw.decreaseIndent(); 2707 pw.decreaseIndent(); 2708 } 2709 2710 private void showValidationNotification(NetworkAgentInfo nai, NotificationType type) { 2711 final String action; 2712 switch (type) { 2713 case NO_INTERNET: 2714 action = ConnectivityManager.ACTION_PROMPT_UNVALIDATED; 2715 break; 2716 case LOST_INTERNET: 2717 action = ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION; 2718 break; 2719 default: 2720 Slog.wtf(TAG, "Unknown notification type " + type); 2721 return; 2722 } 2723 2724 Intent intent = new Intent(action); 2725 intent.setData(Uri.fromParts("netId", Integer.toString(nai.network.netId), null)); 2726 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2727 intent.setClassName("com.android.settings", 2728 "com.android.settings.wifi.WifiNoInternetDialog"); 2729 2730 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2731 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2732 mNotifier.showNotification(nai.network.netId, type, nai, null, pendingIntent, true); 2733 } 2734 2735 private void handlePromptUnvalidated(Network network) { 2736 if (VDBG) log("handlePromptUnvalidated " + network); 2737 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2738 2739 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2740 // we haven't already been told to switch to it regardless of whether it validated or not. 2741 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2742 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2743 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2744 return; 2745 } 2746 showValidationNotification(nai, NotificationType.NO_INTERNET); 2747 } 2748 2749 private void handleNetworkUnvalidated(NetworkAgentInfo nai) { 2750 NetworkCapabilities nc = nai.networkCapabilities; 2751 if (DBG) log("handleNetworkUnvalidated " + nai.name() + " cap=" + nc); 2752 2753 if (nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) && 2754 mMultinetworkPolicyTracker.shouldNotifyWifiUnvalidated()) { 2755 showValidationNotification(nai, NotificationType.LOST_INTERNET); 2756 } 2757 } 2758 2759 @Override 2760 public int getMultipathPreference(Network network) { 2761 enforceAccessPermission(); 2762 2763 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2764 if (nai != null && nai.networkCapabilities 2765 .hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)) { 2766 return ConnectivityManager.MULTIPATH_PREFERENCE_UNMETERED; 2767 } 2768 2769 return mMultinetworkPolicyTracker.getMeteredMultipathPreference(); 2770 } 2771 2772 private class InternalHandler extends Handler { 2773 public InternalHandler(Looper looper) { 2774 super(looper); 2775 } 2776 2777 @Override 2778 public void handleMessage(Message msg) { 2779 switch (msg.what) { 2780 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2781 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2782 handleReleaseNetworkTransitionWakelock(msg.what); 2783 break; 2784 } 2785 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2786 handleDeprecatedGlobalHttpProxy(); 2787 break; 2788 } 2789 case EVENT_PROXY_HAS_CHANGED: { 2790 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2791 break; 2792 } 2793 case EVENT_REGISTER_NETWORK_FACTORY: { 2794 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2795 break; 2796 } 2797 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2798 handleUnregisterNetworkFactory((Messenger)msg.obj); 2799 break; 2800 } 2801 case EVENT_REGISTER_NETWORK_AGENT: { 2802 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2803 break; 2804 } 2805 case EVENT_REGISTER_NETWORK_REQUEST: 2806 case EVENT_REGISTER_NETWORK_LISTENER: { 2807 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2808 break; 2809 } 2810 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2811 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2812 handleRegisterNetworkRequestWithIntent(msg); 2813 break; 2814 } 2815 case EVENT_TIMEOUT_NETWORK_REQUEST: { 2816 NetworkRequestInfo nri = (NetworkRequestInfo) msg.obj; 2817 handleTimedOutNetworkRequest(nri); 2818 break; 2819 } 2820 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2821 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2822 break; 2823 } 2824 case EVENT_RELEASE_NETWORK_REQUEST: { 2825 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2826 break; 2827 } 2828 case EVENT_SET_ACCEPT_UNVALIDATED: { 2829 Network network = (Network) msg.obj; 2830 handleSetAcceptUnvalidated(network, toBool(msg.arg1), toBool(msg.arg2)); 2831 break; 2832 } 2833 case EVENT_SET_AVOID_UNVALIDATED: { 2834 handleSetAvoidUnvalidated((Network) msg.obj); 2835 break; 2836 } 2837 case EVENT_PROMPT_UNVALIDATED: { 2838 handlePromptUnvalidated((Network) msg.obj); 2839 break; 2840 } 2841 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2842 handleMobileDataAlwaysOn(); 2843 break; 2844 } 2845 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2846 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2847 mKeepaliveTracker.handleStartKeepalive(msg); 2848 break; 2849 } 2850 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2851 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2852 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2853 int slot = msg.arg1; 2854 int reason = msg.arg2; 2855 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2856 break; 2857 } 2858 case EVENT_SYSTEM_READY: { 2859 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2860 nai.networkMonitor.systemReady = true; 2861 } 2862 break; 2863 } 2864 case EVENT_REVALIDATE_NETWORK: { 2865 handleReportNetworkConnectivity((Network) msg.obj, msg.arg1, toBool(msg.arg2)); 2866 break; 2867 } 2868 } 2869 } 2870 } 2871 2872 // javadoc from interface 2873 @Override 2874 public int tether(String iface, String callerPkg) { 2875 ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg); 2876 if (isTetheringSupported()) { 2877 final int status = mTethering.tether(iface); 2878 return status; 2879 } else { 2880 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2881 } 2882 } 2883 2884 // javadoc from interface 2885 @Override 2886 public int untether(String iface, String callerPkg) { 2887 ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg); 2888 2889 if (isTetheringSupported()) { 2890 final int status = mTethering.untether(iface); 2891 return status; 2892 } else { 2893 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2894 } 2895 } 2896 2897 // javadoc from interface 2898 @Override 2899 public int getLastTetherError(String iface) { 2900 enforceTetherAccessPermission(); 2901 2902 if (isTetheringSupported()) { 2903 return mTethering.getLastTetherError(iface); 2904 } else { 2905 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2906 } 2907 } 2908 2909 // TODO - proper iface API for selection by property, inspection, etc 2910 @Override 2911 public String[] getTetherableUsbRegexs() { 2912 enforceTetherAccessPermission(); 2913 if (isTetheringSupported()) { 2914 return mTethering.getTetherableUsbRegexs(); 2915 } else { 2916 return new String[0]; 2917 } 2918 } 2919 2920 @Override 2921 public String[] getTetherableWifiRegexs() { 2922 enforceTetherAccessPermission(); 2923 if (isTetheringSupported()) { 2924 return mTethering.getTetherableWifiRegexs(); 2925 } else { 2926 return new String[0]; 2927 } 2928 } 2929 2930 @Override 2931 public String[] getTetherableBluetoothRegexs() { 2932 enforceTetherAccessPermission(); 2933 if (isTetheringSupported()) { 2934 return mTethering.getTetherableBluetoothRegexs(); 2935 } else { 2936 return new String[0]; 2937 } 2938 } 2939 2940 @Override 2941 public int setUsbTethering(boolean enable, String callerPkg) { 2942 ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg); 2943 if (isTetheringSupported()) { 2944 return mTethering.setUsbTethering(enable); 2945 } else { 2946 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2947 } 2948 } 2949 2950 // TODO - move iface listing, queries, etc to new module 2951 // javadoc from interface 2952 @Override 2953 public String[] getTetherableIfaces() { 2954 enforceTetherAccessPermission(); 2955 return mTethering.getTetherableIfaces(); 2956 } 2957 2958 @Override 2959 public String[] getTetheredIfaces() { 2960 enforceTetherAccessPermission(); 2961 return mTethering.getTetheredIfaces(); 2962 } 2963 2964 @Override 2965 public String[] getTetheringErroredIfaces() { 2966 enforceTetherAccessPermission(); 2967 return mTethering.getErroredIfaces(); 2968 } 2969 2970 @Override 2971 public String[] getTetheredDhcpRanges() { 2972 enforceConnectivityInternalPermission(); 2973 return mTethering.getTetheredDhcpRanges(); 2974 } 2975 2976 @Override 2977 public boolean isTetheringSupported(String callerPkg) { 2978 ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg); 2979 return isTetheringSupported(); 2980 } 2981 2982 // if ro.tether.denied = true we default to no tethering 2983 // gservices could set the secure setting to 1 though to enable it on a build where it 2984 // had previously been turned off. 2985 private boolean isTetheringSupported() { 2986 int defaultVal = encodeBool(!mSystemProperties.get("ro.tether.denied").equals("true")); 2987 boolean tetherSupported = toBool(Settings.Global.getInt(mContext.getContentResolver(), 2988 Settings.Global.TETHER_SUPPORTED, defaultVal)); 2989 boolean tetherEnabledInSettings = tetherSupported 2990 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2991 2992 // Elevate to system UID to avoid caller requiring MANAGE_USERS permission. 2993 boolean adminUser = false; 2994 final long token = Binder.clearCallingIdentity(); 2995 try { 2996 adminUser = mUserManager.isAdminUser(); 2997 } finally { 2998 Binder.restoreCallingIdentity(token); 2999 } 3000 3001 return tetherEnabledInSettings && adminUser && mTethering.hasTetherableConfiguration(); 3002 } 3003 3004 @Override 3005 public void startTethering(int type, ResultReceiver receiver, boolean showProvisioningUi, 3006 String callerPkg) { 3007 ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg); 3008 if (!isTetheringSupported()) { 3009 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 3010 return; 3011 } 3012 mTethering.startTethering(type, receiver, showProvisioningUi); 3013 } 3014 3015 @Override 3016 public void stopTethering(int type, String callerPkg) { 3017 ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg); 3018 mTethering.stopTethering(type); 3019 } 3020 3021 // Called when we lose the default network and have no replacement yet. 3022 // This will automatically be cleared after X seconds or a new default network 3023 // becomes CONNECTED, whichever happens first. The timer is started by the 3024 // first caller and not restarted by subsequent callers. 3025 private void ensureNetworkTransitionWakelock(String forWhom) { 3026 synchronized (this) { 3027 if (mNetTransitionWakeLock.isHeld()) { 3028 return; 3029 } 3030 mNetTransitionWakeLock.acquire(); 3031 mLastWakeLockAcquireTimestamp = SystemClock.elapsedRealtime(); 3032 mTotalWakelockAcquisitions++; 3033 } 3034 mWakelockLogs.log("ACQUIRE for " + forWhom); 3035 Message msg = mHandler.obtainMessage(EVENT_EXPIRE_NET_TRANSITION_WAKELOCK); 3036 mHandler.sendMessageDelayed(msg, mNetTransitionWakeLockTimeout); 3037 } 3038 3039 // Called when we gain a new default network to release the network transition wakelock in a 3040 // second, to allow a grace period for apps to reconnect over the new network. Pending expiry 3041 // message is cancelled. 3042 private void scheduleReleaseNetworkTransitionWakelock() { 3043 synchronized (this) { 3044 if (!mNetTransitionWakeLock.isHeld()) { 3045 return; // expiry message released the lock first. 3046 } 3047 } 3048 // Cancel self timeout on wakelock hold. 3049 mHandler.removeMessages(EVENT_EXPIRE_NET_TRANSITION_WAKELOCK); 3050 Message msg = mHandler.obtainMessage(EVENT_CLEAR_NET_TRANSITION_WAKELOCK); 3051 mHandler.sendMessageDelayed(msg, 1000); 3052 } 3053 3054 // Called when either message of ensureNetworkTransitionWakelock or 3055 // scheduleReleaseNetworkTransitionWakelock is processed. 3056 private void handleReleaseNetworkTransitionWakelock(int eventId) { 3057 String event = eventName(eventId); 3058 synchronized (this) { 3059 if (!mNetTransitionWakeLock.isHeld()) { 3060 mWakelockLogs.log(String.format("RELEASE: already released (%s)", event)); 3061 Slog.w(TAG, "expected Net Transition WakeLock to be held"); 3062 return; 3063 } 3064 mNetTransitionWakeLock.release(); 3065 long lockDuration = SystemClock.elapsedRealtime() - mLastWakeLockAcquireTimestamp; 3066 mTotalWakelockDurationMs += lockDuration; 3067 mMaxWakelockDurationMs = Math.max(mMaxWakelockDurationMs, lockDuration); 3068 mTotalWakelockReleases++; 3069 } 3070 mWakelockLogs.log(String.format("RELEASE (%s)", event)); 3071 } 3072 3073 // 100 percent is full good, 0 is full bad. 3074 @Override 3075 public void reportInetCondition(int networkType, int percentage) { 3076 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 3077 if (nai == null) return; 3078 reportNetworkConnectivity(nai.network, percentage > 50); 3079 } 3080 3081 @Override 3082 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 3083 enforceAccessPermission(); 3084 enforceInternetPermission(); 3085 final int uid = Binder.getCallingUid(); 3086 final int connectivityInfo = encodeBool(hasConnectivity); 3087 mHandler.sendMessage( 3088 mHandler.obtainMessage(EVENT_REVALIDATE_NETWORK, uid, connectivityInfo, network)); 3089 } 3090 3091 private void handleReportNetworkConnectivity( 3092 Network network, int uid, boolean hasConnectivity) { 3093 final NetworkAgentInfo nai; 3094 if (network == null) { 3095 nai = getDefaultNetwork(); 3096 } else { 3097 nai = getNetworkAgentInfoForNetwork(network); 3098 } 3099 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 3100 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 3101 return; 3102 } 3103 // Revalidate if the app report does not match our current validated state. 3104 if (hasConnectivity == nai.lastValidated) { 3105 return; 3106 } 3107 if (DBG) { 3108 int netid = nai.network.netId; 3109 log("reportNetworkConnectivity(" + netid + ", " + hasConnectivity + ") by " + uid); 3110 } 3111 // Validating a network that has not yet connected could result in a call to 3112 // rematchNetworkAndRequests() which is not meant to work on such networks. 3113 if (!nai.everConnected) { 3114 return; 3115 } 3116 LinkProperties lp = getLinkProperties(nai); 3117 if (isNetworkWithLinkPropertiesBlocked(lp, uid, false)) { 3118 return; 3119 } 3120 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 3121 } 3122 3123 private ProxyInfo getDefaultProxy() { 3124 // this information is already available as a world read/writable jvm property 3125 // so this API change wouldn't have a benifit. It also breaks the passing 3126 // of proxy info to all the JVMs. 3127 // enforceAccessPermission(); 3128 synchronized (mProxyLock) { 3129 ProxyInfo ret = mGlobalProxy; 3130 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3131 return ret; 3132 } 3133 } 3134 3135 @Override 3136 public ProxyInfo getProxyForNetwork(Network network) { 3137 if (network == null) return getDefaultProxy(); 3138 final ProxyInfo globalProxy = getGlobalProxy(); 3139 if (globalProxy != null) return globalProxy; 3140 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3141 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3142 // caller may not have. 3143 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3144 if (nai == null) return null; 3145 synchronized (nai) { 3146 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3147 if (proxyInfo == null) return null; 3148 return new ProxyInfo(proxyInfo); 3149 } 3150 } 3151 3152 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3153 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3154 // proxy is null then there is no proxy in place). 3155 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3156 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3157 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3158 proxy = null; 3159 } 3160 return proxy; 3161 } 3162 3163 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3164 // better for determining if a new proxy broadcast is necessary: 3165 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3166 // avoid unnecessary broadcasts. 3167 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3168 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3169 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3170 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3171 // all set. 3172 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3173 a = canonicalizeProxyInfo(a); 3174 b = canonicalizeProxyInfo(b); 3175 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3176 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3177 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3178 } 3179 3180 public void setGlobalProxy(ProxyInfo proxyProperties) { 3181 enforceConnectivityInternalPermission(); 3182 3183 synchronized (mProxyLock) { 3184 if (proxyProperties == mGlobalProxy) return; 3185 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3186 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3187 3188 String host = ""; 3189 int port = 0; 3190 String exclList = ""; 3191 String pacFileUrl = ""; 3192 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3193 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3194 if (!proxyProperties.isValid()) { 3195 if (DBG) 3196 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3197 return; 3198 } 3199 mGlobalProxy = new ProxyInfo(proxyProperties); 3200 host = mGlobalProxy.getHost(); 3201 port = mGlobalProxy.getPort(); 3202 exclList = mGlobalProxy.getExclusionListAsString(); 3203 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3204 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3205 } 3206 } else { 3207 mGlobalProxy = null; 3208 } 3209 ContentResolver res = mContext.getContentResolver(); 3210 final long token = Binder.clearCallingIdentity(); 3211 try { 3212 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3213 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3214 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3215 exclList); 3216 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3217 } finally { 3218 Binder.restoreCallingIdentity(token); 3219 } 3220 3221 if (mGlobalProxy == null) { 3222 proxyProperties = mDefaultProxy; 3223 } 3224 sendProxyBroadcast(proxyProperties); 3225 } 3226 } 3227 3228 private void loadGlobalProxy() { 3229 ContentResolver res = mContext.getContentResolver(); 3230 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3231 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3232 String exclList = Settings.Global.getString(res, 3233 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3234 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3235 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3236 ProxyInfo proxyProperties; 3237 if (!TextUtils.isEmpty(pacFileUrl)) { 3238 proxyProperties = new ProxyInfo(pacFileUrl); 3239 } else { 3240 proxyProperties = new ProxyInfo(host, port, exclList); 3241 } 3242 if (!proxyProperties.isValid()) { 3243 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3244 return; 3245 } 3246 3247 synchronized (mProxyLock) { 3248 mGlobalProxy = proxyProperties; 3249 } 3250 } 3251 } 3252 3253 public ProxyInfo getGlobalProxy() { 3254 // this information is already available as a world read/writable jvm property 3255 // so this API change wouldn't have a benifit. It also breaks the passing 3256 // of proxy info to all the JVMs. 3257 // enforceAccessPermission(); 3258 synchronized (mProxyLock) { 3259 return mGlobalProxy; 3260 } 3261 } 3262 3263 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3264 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3265 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3266 proxy = null; 3267 } 3268 synchronized (mProxyLock) { 3269 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3270 if (mDefaultProxy == proxy) return; // catches repeated nulls 3271 if (proxy != null && !proxy.isValid()) { 3272 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3273 return; 3274 } 3275 3276 // This call could be coming from the PacManager, containing the port of the local 3277 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3278 // global (to get the correct local port), and send a broadcast. 3279 // TODO: Switch PacManager to have its own message to send back rather than 3280 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3281 if ((mGlobalProxy != null) && (proxy != null) 3282 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3283 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3284 mGlobalProxy = proxy; 3285 sendProxyBroadcast(mGlobalProxy); 3286 return; 3287 } 3288 mDefaultProxy = proxy; 3289 3290 if (mGlobalProxy != null) return; 3291 if (!mDefaultProxyDisabled) { 3292 sendProxyBroadcast(proxy); 3293 } 3294 } 3295 } 3296 3297 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3298 // This method gets called when any network changes proxy, but the broadcast only ever contains 3299 // the default proxy (even if it hasn't changed). 3300 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3301 // world where an app might be bound to a non-default network. 3302 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3303 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3304 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3305 3306 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3307 sendProxyBroadcast(getDefaultProxy()); 3308 } 3309 } 3310 3311 private void handleDeprecatedGlobalHttpProxy() { 3312 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3313 Settings.Global.HTTP_PROXY); 3314 if (!TextUtils.isEmpty(proxy)) { 3315 String data[] = proxy.split(":"); 3316 if (data.length == 0) { 3317 return; 3318 } 3319 3320 String proxyHost = data[0]; 3321 int proxyPort = 8080; 3322 if (data.length > 1) { 3323 try { 3324 proxyPort = Integer.parseInt(data[1]); 3325 } catch (NumberFormatException e) { 3326 return; 3327 } 3328 } 3329 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3330 setGlobalProxy(p); 3331 } 3332 } 3333 3334 private void sendProxyBroadcast(ProxyInfo proxy) { 3335 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3336 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3337 if (DBG) log("sending Proxy Broadcast for " + proxy); 3338 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3339 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3340 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3341 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3342 final long ident = Binder.clearCallingIdentity(); 3343 try { 3344 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3345 } finally { 3346 Binder.restoreCallingIdentity(ident); 3347 } 3348 } 3349 3350 private static class SettingsObserver extends ContentObserver { 3351 final private HashMap<Uri, Integer> mUriEventMap; 3352 final private Context mContext; 3353 final private Handler mHandler; 3354 3355 SettingsObserver(Context context, Handler handler) { 3356 super(null); 3357 mUriEventMap = new HashMap<Uri, Integer>(); 3358 mContext = context; 3359 mHandler = handler; 3360 } 3361 3362 void observe(Uri uri, int what) { 3363 mUriEventMap.put(uri, what); 3364 final ContentResolver resolver = mContext.getContentResolver(); 3365 resolver.registerContentObserver(uri, false, this); 3366 } 3367 3368 @Override 3369 public void onChange(boolean selfChange) { 3370 Slog.wtf(TAG, "Should never be reached."); 3371 } 3372 3373 @Override 3374 public void onChange(boolean selfChange, Uri uri) { 3375 final Integer what = mUriEventMap.get(uri); 3376 if (what != null) { 3377 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3378 } else { 3379 loge("No matching event to send for URI=" + uri); 3380 } 3381 } 3382 } 3383 3384 private static void log(String s) { 3385 Slog.d(TAG, s); 3386 } 3387 3388 private static void loge(String s) { 3389 Slog.e(TAG, s); 3390 } 3391 3392 private static void loge(String s, Throwable t) { 3393 Slog.e(TAG, s, t); 3394 } 3395 3396 /** 3397 * Prepare for a VPN application. 3398 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3399 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3400 * 3401 * @param oldPackage Package name of the application which currently controls VPN, which will 3402 * be replaced. If there is no such application, this should should either be 3403 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3404 * @param newPackage Package name of the application which should gain control of VPN, or 3405 * {@code null} to disable. 3406 * @param userId User for whom to prepare the new VPN. 3407 * 3408 * @hide 3409 */ 3410 @Override 3411 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3412 int userId) { 3413 enforceCrossUserPermission(userId); 3414 throwIfLockdownEnabled(); 3415 3416 synchronized (mVpns) { 3417 Vpn vpn = mVpns.get(userId); 3418 if (vpn != null) { 3419 return vpn.prepare(oldPackage, newPackage); 3420 } else { 3421 return false; 3422 } 3423 } 3424 } 3425 3426 /** 3427 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3428 * This method is used by system-privileged apps. 3429 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3430 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3431 * 3432 * @param packageName The package for which authorization state should change. 3433 * @param userId User for whom {@code packageName} is installed. 3434 * @param authorized {@code true} if this app should be able to start a VPN connection without 3435 * explicit user approval, {@code false} if not. 3436 * 3437 * @hide 3438 */ 3439 @Override 3440 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3441 enforceCrossUserPermission(userId); 3442 3443 synchronized (mVpns) { 3444 Vpn vpn = mVpns.get(userId); 3445 if (vpn != null) { 3446 vpn.setPackageAuthorization(packageName, authorized); 3447 } 3448 } 3449 } 3450 3451 /** 3452 * Configure a TUN interface and return its file descriptor. Parameters 3453 * are encoded and opaque to this class. This method is used by VpnBuilder 3454 * and not available in ConnectivityManager. Permissions are checked in 3455 * Vpn class. 3456 * @hide 3457 */ 3458 @Override 3459 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3460 throwIfLockdownEnabled(); 3461 int user = UserHandle.getUserId(Binder.getCallingUid()); 3462 synchronized (mVpns) { 3463 return mVpns.get(user).establish(config); 3464 } 3465 } 3466 3467 /** 3468 * Start legacy VPN, controlling native daemons as needed. Creates a 3469 * secondary thread to perform connection work, returning quickly. 3470 */ 3471 @Override 3472 public void startLegacyVpn(VpnProfile profile) { 3473 throwIfLockdownEnabled(); 3474 final LinkProperties egress = getActiveLinkProperties(); 3475 if (egress == null) { 3476 throw new IllegalStateException("Missing active network connection"); 3477 } 3478 int user = UserHandle.getUserId(Binder.getCallingUid()); 3479 synchronized (mVpns) { 3480 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3481 } 3482 } 3483 3484 /** 3485 * Return the information of the ongoing legacy VPN. This method is used 3486 * by VpnSettings and not available in ConnectivityManager. Permissions 3487 * are checked in Vpn class. 3488 */ 3489 @Override 3490 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3491 enforceCrossUserPermission(userId); 3492 3493 synchronized (mVpns) { 3494 return mVpns.get(userId).getLegacyVpnInfo(); 3495 } 3496 } 3497 3498 /** 3499 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3500 * and not available in ConnectivityManager. 3501 */ 3502 @Override 3503 public VpnInfo[] getAllVpnInfo() { 3504 enforceConnectivityInternalPermission(); 3505 if (mLockdownEnabled) { 3506 return new VpnInfo[0]; 3507 } 3508 3509 synchronized (mVpns) { 3510 List<VpnInfo> infoList = new ArrayList<>(); 3511 for (int i = 0; i < mVpns.size(); i++) { 3512 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3513 if (info != null) { 3514 infoList.add(info); 3515 } 3516 } 3517 return infoList.toArray(new VpnInfo[infoList.size()]); 3518 } 3519 } 3520 3521 /** 3522 * @return VPN information for accounting, or null if we can't retrieve all required 3523 * information, e.g primary underlying iface. 3524 */ 3525 @Nullable 3526 private VpnInfo createVpnInfo(Vpn vpn) { 3527 VpnInfo info = vpn.getVpnInfo(); 3528 if (info == null) { 3529 return null; 3530 } 3531 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3532 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3533 // the underlyingNetworks list. 3534 if (underlyingNetworks == null) { 3535 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3536 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3537 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3538 } 3539 } else if (underlyingNetworks.length > 0) { 3540 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3541 if (linkProperties != null) { 3542 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3543 } 3544 } 3545 return info.primaryUnderlyingIface == null ? null : info; 3546 } 3547 3548 /** 3549 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3550 * VpnDialogs and not available in ConnectivityManager. 3551 * Permissions are checked in Vpn class. 3552 * @hide 3553 */ 3554 @Override 3555 public VpnConfig getVpnConfig(int userId) { 3556 enforceCrossUserPermission(userId); 3557 synchronized (mVpns) { 3558 Vpn vpn = mVpns.get(userId); 3559 if (vpn != null) { 3560 return vpn.getVpnConfig(); 3561 } else { 3562 return null; 3563 } 3564 } 3565 } 3566 3567 @Override 3568 public boolean updateLockdownVpn() { 3569 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3570 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3571 return false; 3572 } 3573 3574 // Tear down existing lockdown if profile was removed 3575 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3576 if (mLockdownEnabled) { 3577 byte[] profileTag = mKeyStore.get(Credentials.LOCKDOWN_VPN); 3578 if (profileTag == null) { 3579 Slog.e(TAG, "Lockdown VPN configured but cannot be read from keystore"); 3580 return false; 3581 } 3582 String profileName = new String(profileTag); 3583 final VpnProfile profile = VpnProfile.decode( 3584 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3585 if (profile == null) { 3586 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3587 setLockdownTracker(null); 3588 return true; 3589 } 3590 int user = UserHandle.getUserId(Binder.getCallingUid()); 3591 synchronized (mVpns) { 3592 Vpn vpn = mVpns.get(user); 3593 if (vpn == null) { 3594 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3595 return false; 3596 } 3597 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3598 } 3599 } else { 3600 setLockdownTracker(null); 3601 } 3602 3603 return true; 3604 } 3605 3606 /** 3607 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3608 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3609 */ 3610 private void setLockdownTracker(LockdownVpnTracker tracker) { 3611 // Shutdown any existing tracker 3612 final LockdownVpnTracker existing = mLockdownTracker; 3613 mLockdownTracker = null; 3614 if (existing != null) { 3615 existing.shutdown(); 3616 } 3617 3618 if (tracker != null) { 3619 mLockdownTracker = tracker; 3620 mLockdownTracker.init(); 3621 } 3622 } 3623 3624 private void throwIfLockdownEnabled() { 3625 if (mLockdownEnabled) { 3626 throw new IllegalStateException("Unavailable in lockdown mode"); 3627 } 3628 } 3629 3630 /** 3631 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3632 * some setup and then call {@code establish()} to connect. 3633 * 3634 * @return {@code true} if the service was started, the service was already connected, or there 3635 * was no always-on VPN to start. {@code false} otherwise. 3636 */ 3637 private boolean startAlwaysOnVpn(int userId) { 3638 synchronized (mVpns) { 3639 Vpn vpn = mVpns.get(userId); 3640 if (vpn == null) { 3641 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3642 // exists already. 3643 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3644 return false; 3645 } 3646 3647 return vpn.startAlwaysOnVpn(); 3648 } 3649 } 3650 3651 @Override 3652 public boolean isAlwaysOnVpnPackageSupported(int userId, String packageName) { 3653 enforceSettingsPermission(); 3654 enforceCrossUserPermission(userId); 3655 3656 synchronized (mVpns) { 3657 Vpn vpn = mVpns.get(userId); 3658 if (vpn == null) { 3659 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3660 return false; 3661 } 3662 return vpn.isAlwaysOnPackageSupported(packageName); 3663 } 3664 } 3665 3666 @Override 3667 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3668 enforceConnectivityInternalPermission(); 3669 enforceCrossUserPermission(userId); 3670 3671 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3672 if (LockdownVpnTracker.isEnabled()) { 3673 return false; 3674 } 3675 3676 synchronized (mVpns) { 3677 Vpn vpn = mVpns.get(userId); 3678 if (vpn == null) { 3679 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3680 return false; 3681 } 3682 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3683 return false; 3684 } 3685 if (!startAlwaysOnVpn(userId)) { 3686 vpn.setAlwaysOnPackage(null, false); 3687 return false; 3688 } 3689 } 3690 return true; 3691 } 3692 3693 @Override 3694 public String getAlwaysOnVpnPackage(int userId) { 3695 enforceConnectivityInternalPermission(); 3696 enforceCrossUserPermission(userId); 3697 3698 synchronized (mVpns) { 3699 Vpn vpn = mVpns.get(userId); 3700 if (vpn == null) { 3701 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3702 return null; 3703 } 3704 return vpn.getAlwaysOnPackage(); 3705 } 3706 } 3707 3708 @Override 3709 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3710 // TODO: Remove? Any reason to trigger a provisioning check? 3711 return -1; 3712 } 3713 3714 /** Location to an updatable file listing carrier provisioning urls. 3715 * An example: 3716 * 3717 * <?xml version="1.0" encoding="utf-8"?> 3718 * <provisioningUrls> 3719 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3720 * </provisioningUrls> 3721 */ 3722 private static final String PROVISIONING_URL_PATH = 3723 "/data/misc/radio/provisioning_urls.xml"; 3724 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3725 3726 /** XML tag for root element. */ 3727 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3728 /** XML tag for individual url */ 3729 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3730 /** XML attribute for mcc */ 3731 private static final String ATTR_MCC = "mcc"; 3732 /** XML attribute for mnc */ 3733 private static final String ATTR_MNC = "mnc"; 3734 3735 private String getProvisioningUrlBaseFromFile() { 3736 FileReader fileReader = null; 3737 XmlPullParser parser = null; 3738 Configuration config = mContext.getResources().getConfiguration(); 3739 3740 try { 3741 fileReader = new FileReader(mProvisioningUrlFile); 3742 parser = Xml.newPullParser(); 3743 parser.setInput(fileReader); 3744 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3745 3746 while (true) { 3747 XmlUtils.nextElement(parser); 3748 3749 String element = parser.getName(); 3750 if (element == null) break; 3751 3752 if (element.equals(TAG_PROVISIONING_URL)) { 3753 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3754 try { 3755 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3756 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3757 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3758 parser.next(); 3759 if (parser.getEventType() == XmlPullParser.TEXT) { 3760 return parser.getText(); 3761 } 3762 } 3763 } 3764 } catch (NumberFormatException e) { 3765 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3766 } 3767 } 3768 } 3769 return null; 3770 } catch (FileNotFoundException e) { 3771 loge("Carrier Provisioning Urls file not found"); 3772 } catch (XmlPullParserException e) { 3773 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3774 } catch (IOException e) { 3775 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3776 } finally { 3777 if (fileReader != null) { 3778 try { 3779 fileReader.close(); 3780 } catch (IOException e) {} 3781 } 3782 } 3783 return null; 3784 } 3785 3786 @Override 3787 public String getMobileProvisioningUrl() { 3788 enforceConnectivityInternalPermission(); 3789 String url = getProvisioningUrlBaseFromFile(); 3790 if (TextUtils.isEmpty(url)) { 3791 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3792 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3793 } else { 3794 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3795 } 3796 // populate the iccid, imei and phone number in the provisioning url. 3797 if (!TextUtils.isEmpty(url)) { 3798 String phoneNumber = mTelephonyManager.getLine1Number(); 3799 if (TextUtils.isEmpty(phoneNumber)) { 3800 phoneNumber = "0000000000"; 3801 } 3802 url = String.format(url, 3803 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3804 mTelephonyManager.getDeviceId() /* IMEI */, 3805 phoneNumber /* Phone numer */); 3806 } 3807 3808 return url; 3809 } 3810 3811 @Override 3812 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3813 String action) { 3814 enforceConnectivityInternalPermission(); 3815 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 3816 return; 3817 } 3818 final long ident = Binder.clearCallingIdentity(); 3819 try { 3820 // Concatenate the range of types onto the range of NetIDs. 3821 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3822 mNotifier.setProvNotificationVisible(visible, id, action); 3823 } finally { 3824 Binder.restoreCallingIdentity(ident); 3825 } 3826 } 3827 3828 @Override 3829 public void setAirplaneMode(boolean enable) { 3830 enforceConnectivityInternalPermission(); 3831 final long ident = Binder.clearCallingIdentity(); 3832 try { 3833 final ContentResolver cr = mContext.getContentResolver(); 3834 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, encodeBool(enable)); 3835 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3836 intent.putExtra("state", enable); 3837 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3838 } finally { 3839 Binder.restoreCallingIdentity(ident); 3840 } 3841 } 3842 3843 private void onUserStart(int userId) { 3844 synchronized (mVpns) { 3845 Vpn userVpn = mVpns.get(userId); 3846 if (userVpn != null) { 3847 loge("Starting user already has a VPN"); 3848 return; 3849 } 3850 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3851 mVpns.put(userId, userVpn); 3852 } 3853 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3854 updateLockdownVpn(); 3855 } 3856 } 3857 3858 private void onUserStop(int userId) { 3859 synchronized (mVpns) { 3860 Vpn userVpn = mVpns.get(userId); 3861 if (userVpn == null) { 3862 loge("Stopped user has no VPN"); 3863 return; 3864 } 3865 userVpn.onUserStopped(); 3866 mVpns.delete(userId); 3867 } 3868 } 3869 3870 private void onUserAdded(int userId) { 3871 synchronized (mVpns) { 3872 final int vpnsSize = mVpns.size(); 3873 for (int i = 0; i < vpnsSize; i++) { 3874 Vpn vpn = mVpns.valueAt(i); 3875 vpn.onUserAdded(userId); 3876 } 3877 } 3878 } 3879 3880 private void onUserRemoved(int userId) { 3881 synchronized (mVpns) { 3882 final int vpnsSize = mVpns.size(); 3883 for (int i = 0; i < vpnsSize; i++) { 3884 Vpn vpn = mVpns.valueAt(i); 3885 vpn.onUserRemoved(userId); 3886 } 3887 } 3888 } 3889 3890 private void onUserUnlocked(int userId) { 3891 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3892 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3893 updateLockdownVpn(); 3894 } else { 3895 startAlwaysOnVpn(userId); 3896 } 3897 } 3898 3899 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3900 @Override 3901 public void onReceive(Context context, Intent intent) { 3902 final String action = intent.getAction(); 3903 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3904 if (userId == UserHandle.USER_NULL) return; 3905 3906 if (Intent.ACTION_USER_STARTED.equals(action)) { 3907 onUserStart(userId); 3908 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3909 onUserStop(userId); 3910 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3911 onUserAdded(userId); 3912 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3913 onUserRemoved(userId); 3914 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3915 onUserUnlocked(userId); 3916 } 3917 } 3918 }; 3919 3920 private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() { 3921 @Override 3922 public void onReceive(Context context, Intent intent) { 3923 // Try creating lockdown tracker, since user present usually means 3924 // unlocked keystore. 3925 updateLockdownVpn(); 3926 mContext.unregisterReceiver(this); 3927 } 3928 }; 3929 3930 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3931 new HashMap<Messenger, NetworkFactoryInfo>(); 3932 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3933 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3934 3935 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3936 // Map from UID to number of NetworkRequests that UID has filed. 3937 @GuardedBy("mUidToNetworkRequestCount") 3938 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3939 3940 private static class NetworkFactoryInfo { 3941 public final String name; 3942 public final Messenger messenger; 3943 public final AsyncChannel asyncChannel; 3944 3945 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3946 this.name = name; 3947 this.messenger = messenger; 3948 this.asyncChannel = asyncChannel; 3949 } 3950 } 3951 3952 private void ensureNetworkRequestHasType(NetworkRequest request) { 3953 if (request.type == NetworkRequest.Type.NONE) { 3954 throw new IllegalArgumentException( 3955 "All NetworkRequests in ConnectivityService must have a type"); 3956 } 3957 } 3958 3959 /** 3960 * Tracks info about the requester. 3961 * Also used to notice when the calling process dies so we can self-expire 3962 */ 3963 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3964 final NetworkRequest request; 3965 final PendingIntent mPendingIntent; 3966 boolean mPendingIntentSent; 3967 private final IBinder mBinder; 3968 final int mPid; 3969 final int mUid; 3970 final Messenger messenger; 3971 3972 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 3973 request = r; 3974 ensureNetworkRequestHasType(request); 3975 mPendingIntent = pi; 3976 messenger = null; 3977 mBinder = null; 3978 mPid = getCallingPid(); 3979 mUid = getCallingUid(); 3980 enforceRequestCountLimit(); 3981 } 3982 3983 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 3984 super(); 3985 messenger = m; 3986 request = r; 3987 ensureNetworkRequestHasType(request); 3988 mBinder = binder; 3989 mPid = getCallingPid(); 3990 mUid = getCallingUid(); 3991 mPendingIntent = null; 3992 enforceRequestCountLimit(); 3993 3994 try { 3995 mBinder.linkToDeath(this, 0); 3996 } catch (RemoteException e) { 3997 binderDied(); 3998 } 3999 } 4000 4001 private void enforceRequestCountLimit() { 4002 synchronized (mUidToNetworkRequestCount) { 4003 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 4004 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 4005 throw new ServiceSpecificException( 4006 ConnectivityManager.Errors.TOO_MANY_REQUESTS); 4007 } 4008 mUidToNetworkRequestCount.put(mUid, networkRequests); 4009 } 4010 } 4011 4012 void unlinkDeathRecipient() { 4013 if (mBinder != null) { 4014 mBinder.unlinkToDeath(this, 0); 4015 } 4016 } 4017 4018 public void binderDied() { 4019 log("ConnectivityService NetworkRequestInfo binderDied(" + 4020 request + ", " + mBinder + ")"); 4021 releaseNetworkRequest(request); 4022 } 4023 4024 public String toString() { 4025 return "uid/pid:" + mUid + "/" + mPid + " " + request + 4026 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 4027 } 4028 } 4029 4030 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 4031 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 4032 if (badCapability != null) { 4033 throw new IllegalArgumentException("Cannot request network with " + badCapability); 4034 } 4035 } 4036 4037 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 4038 final SortedSet<Integer> thresholds = new TreeSet(); 4039 synchronized (nai) { 4040 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4041 if (nri.request.networkCapabilities.hasSignalStrength() && 4042 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 4043 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 4044 } 4045 } 4046 } 4047 return new ArrayList<Integer>(thresholds); 4048 } 4049 4050 private void updateSignalStrengthThresholds( 4051 NetworkAgentInfo nai, String reason, NetworkRequest request) { 4052 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 4053 Bundle thresholds = new Bundle(); 4054 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 4055 4056 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 4057 String detail; 4058 if (request != null && request.networkCapabilities.hasSignalStrength()) { 4059 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 4060 } else { 4061 detail = reason; 4062 } 4063 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 4064 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 4065 } 4066 4067 nai.asyncChannel.sendMessage( 4068 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 4069 0, 0, thresholds); 4070 } 4071 4072 private void ensureValidNetworkSpecifier(NetworkCapabilities nc) { 4073 if (nc == null) { 4074 return; 4075 } 4076 NetworkSpecifier ns = nc.getNetworkSpecifier(); 4077 if (ns == null) { 4078 return; 4079 } 4080 MatchAllNetworkSpecifier.checkNotMatchAllNetworkSpecifier(ns); 4081 ns.assertValidFromUid(Binder.getCallingUid()); 4082 } 4083 4084 @Override 4085 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 4086 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 4087 final NetworkRequest.Type type = (networkCapabilities == null) 4088 ? NetworkRequest.Type.TRACK_DEFAULT 4089 : NetworkRequest.Type.REQUEST; 4090 // If the requested networkCapabilities is null, take them instead from 4091 // the default network request. This allows callers to keep track of 4092 // the system default network. 4093 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 4094 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 4095 enforceAccessPermission(); 4096 } else { 4097 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4098 enforceNetworkRequestPermissions(networkCapabilities); 4099 // TODO: this is incorrect. We mark the request as metered or not depending on the state 4100 // of the app when the request is filed, but we never change the request if the app 4101 // changes network state. http://b/29964605 4102 enforceMeteredApnPolicy(networkCapabilities); 4103 } 4104 ensureRequestableCapabilities(networkCapabilities); 4105 4106 if (timeoutMs < 0) { 4107 throw new IllegalArgumentException("Bad timeout specified"); 4108 } 4109 ensureValidNetworkSpecifier(networkCapabilities); 4110 4111 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4112 nextNetworkRequestId(), type); 4113 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4114 if (DBG) log("requestNetwork for " + nri); 4115 4116 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4117 if (timeoutMs > 0) { 4118 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4119 nri), timeoutMs); 4120 } 4121 return networkRequest; 4122 } 4123 4124 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4125 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4126 enforceConnectivityRestrictedNetworksPermission(); 4127 } else { 4128 enforceChangePermission(); 4129 } 4130 } 4131 4132 @Override 4133 public boolean requestBandwidthUpdate(Network network) { 4134 enforceAccessPermission(); 4135 NetworkAgentInfo nai = null; 4136 if (network == null) { 4137 return false; 4138 } 4139 synchronized (mNetworkForNetId) { 4140 nai = mNetworkForNetId.get(network.netId); 4141 } 4142 if (nai != null) { 4143 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4144 return true; 4145 } 4146 return false; 4147 } 4148 4149 private boolean isSystem(int uid) { 4150 return uid < Process.FIRST_APPLICATION_UID; 4151 } 4152 4153 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4154 final int uid = Binder.getCallingUid(); 4155 if (isSystem(uid)) { 4156 // Exemption for system uid. 4157 return; 4158 } 4159 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED)) { 4160 // Policy already enforced. 4161 return; 4162 } 4163 if (mPolicyManagerInternal.isUidRestrictedOnMeteredNetworks(uid)) { 4164 // If UID is restricted, don't allow them to bring up metered APNs. 4165 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4166 } 4167 } 4168 4169 @Override 4170 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4171 PendingIntent operation) { 4172 checkNotNull(operation, "PendingIntent cannot be null."); 4173 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4174 enforceNetworkRequestPermissions(networkCapabilities); 4175 enforceMeteredApnPolicy(networkCapabilities); 4176 ensureRequestableCapabilities(networkCapabilities); 4177 ensureValidNetworkSpecifier(networkCapabilities); 4178 4179 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4180 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4181 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4182 if (DBG) log("pendingRequest for " + nri); 4183 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4184 nri)); 4185 return networkRequest; 4186 } 4187 4188 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4189 mHandler.sendMessageDelayed( 4190 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4191 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4192 } 4193 4194 @Override 4195 public void releasePendingNetworkRequest(PendingIntent operation) { 4196 checkNotNull(operation, "PendingIntent cannot be null."); 4197 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4198 getCallingUid(), 0, operation)); 4199 } 4200 4201 // In order to implement the compatibility measure for pre-M apps that call 4202 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4203 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4204 // This ensures it has permission to do so. 4205 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4206 if (nc == null) { 4207 return false; 4208 } 4209 int[] transportTypes = nc.getTransportTypes(); 4210 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4211 return false; 4212 } 4213 try { 4214 mContext.enforceCallingOrSelfPermission( 4215 android.Manifest.permission.ACCESS_WIFI_STATE, 4216 "ConnectivityService"); 4217 } catch (SecurityException e) { 4218 return false; 4219 } 4220 return true; 4221 } 4222 4223 @Override 4224 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4225 Messenger messenger, IBinder binder) { 4226 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4227 enforceAccessPermission(); 4228 } 4229 4230 NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities); 4231 if (!ConnectivityManager.checkChangePermission(mContext)) { 4232 // Apps without the CHANGE_NETWORK_STATE permission can't use background networks, so 4233 // make all their listens include NET_CAPABILITY_FOREGROUND. That way, they will get 4234 // onLost and onAvailable callbacks when networks move in and out of the background. 4235 // There is no need to do this for requests because an app without CHANGE_NETWORK_STATE 4236 // can't request networks. 4237 nc.addCapability(NET_CAPABILITY_FOREGROUND); 4238 } 4239 ensureValidNetworkSpecifier(networkCapabilities); 4240 4241 NetworkRequest networkRequest = new NetworkRequest(nc, TYPE_NONE, nextNetworkRequestId(), 4242 NetworkRequest.Type.LISTEN); 4243 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4244 if (VDBG) log("listenForNetwork for " + nri); 4245 4246 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4247 return networkRequest; 4248 } 4249 4250 @Override 4251 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4252 PendingIntent operation) { 4253 checkNotNull(operation, "PendingIntent cannot be null."); 4254 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4255 enforceAccessPermission(); 4256 } 4257 ensureValidNetworkSpecifier(networkCapabilities); 4258 4259 NetworkRequest networkRequest = new NetworkRequest( 4260 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4261 NetworkRequest.Type.LISTEN); 4262 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4263 if (VDBG) log("pendingListenForNetwork for " + nri); 4264 4265 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4266 } 4267 4268 @Override 4269 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4270 ensureNetworkRequestHasType(networkRequest); 4271 mHandler.sendMessage(mHandler.obtainMessage( 4272 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4273 } 4274 4275 @Override 4276 public void registerNetworkFactory(Messenger messenger, String name) { 4277 enforceConnectivityInternalPermission(); 4278 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4279 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4280 } 4281 4282 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4283 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4284 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4285 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4286 } 4287 4288 @Override 4289 public void unregisterNetworkFactory(Messenger messenger) { 4290 enforceConnectivityInternalPermission(); 4291 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4292 } 4293 4294 private void handleUnregisterNetworkFactory(Messenger messenger) { 4295 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4296 if (nfi == null) { 4297 loge("Failed to find Messenger in unregisterNetworkFactory"); 4298 return; 4299 } 4300 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4301 } 4302 4303 /** 4304 * NetworkAgentInfo supporting a request by requestId. 4305 * These have already been vetted (their Capabilities satisfy the request) 4306 * and the are the highest scored network available. 4307 * the are keyed off the Requests requestId. 4308 */ 4309 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4310 @GuardedBy("mNetworkForRequestId") 4311 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4312 new SparseArray<NetworkAgentInfo>(); 4313 4314 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4315 @GuardedBy("mNetworkForNetId") 4316 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4317 new SparseArray<NetworkAgentInfo>(); 4318 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4319 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4320 // there may not be a strict 1:1 correlation between the two. 4321 @GuardedBy("mNetworkForNetId") 4322 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4323 4324 // NetworkAgentInfo keyed off its connecting messenger 4325 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4326 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4327 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4328 new HashMap<Messenger, NetworkAgentInfo>(); 4329 4330 @GuardedBy("mBlockedAppUids") 4331 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4332 4333 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4334 private final NetworkRequest mDefaultRequest; 4335 4336 // Request used to optionally keep mobile data active even when higher 4337 // priority networks like Wi-Fi are active. 4338 private final NetworkRequest mDefaultMobileDataRequest; 4339 4340 private NetworkAgentInfo getNetworkForRequest(int requestId) { 4341 synchronized (mNetworkForRequestId) { 4342 return mNetworkForRequestId.get(requestId); 4343 } 4344 } 4345 4346 private void clearNetworkForRequest(int requestId) { 4347 synchronized (mNetworkForRequestId) { 4348 mNetworkForRequestId.remove(requestId); 4349 } 4350 } 4351 4352 private void setNetworkForRequest(int requestId, NetworkAgentInfo nai) { 4353 synchronized (mNetworkForRequestId) { 4354 mNetworkForRequestId.put(requestId, nai); 4355 } 4356 } 4357 4358 private NetworkAgentInfo getDefaultNetwork() { 4359 return getNetworkForRequest(mDefaultRequest.requestId); 4360 } 4361 4362 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4363 return nai == getDefaultNetwork(); 4364 } 4365 4366 private boolean isDefaultRequest(NetworkRequestInfo nri) { 4367 return nri.request.requestId == mDefaultRequest.requestId; 4368 } 4369 4370 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4371 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4372 int currentScore, NetworkMisc networkMisc) { 4373 enforceConnectivityInternalPermission(); 4374 4375 LinkProperties lp = new LinkProperties(linkProperties); 4376 lp.ensureDirectlyConnectedRoutes(); 4377 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4378 // satisfies mDefaultRequest. 4379 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4380 new Network(reserveNetId()), new NetworkInfo(networkInfo), lp, 4381 new NetworkCapabilities(networkCapabilities), currentScore, 4382 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4383 synchronized (this) { 4384 nai.networkMonitor.systemReady = mSystemReady; 4385 } 4386 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, 4387 networkInfo.getExtraInfo()); 4388 if (DBG) log("registerNetworkAgent " + nai); 4389 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4390 return nai.network.netId; 4391 } 4392 4393 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4394 if (VDBG) log("Got NetworkAgent Messenger"); 4395 mNetworkAgentInfos.put(na.messenger, na); 4396 synchronized (mNetworkForNetId) { 4397 mNetworkForNetId.put(na.network.netId, na); 4398 } 4399 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4400 NetworkInfo networkInfo = na.networkInfo; 4401 na.networkInfo = null; 4402 updateNetworkInfo(na, networkInfo); 4403 } 4404 4405 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4406 LinkProperties newLp = networkAgent.linkProperties; 4407 int netId = networkAgent.network.netId; 4408 4409 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4410 // we do anything else, make sure its LinkProperties are accurate. 4411 if (networkAgent.clatd != null) { 4412 networkAgent.clatd.fixupLinkProperties(oldLp); 4413 } 4414 4415 updateInterfaces(newLp, oldLp, netId, networkAgent.networkCapabilities); 4416 updateMtu(newLp, oldLp); 4417 // TODO - figure out what to do for clat 4418// for (LinkProperties lp : newLp.getStackedLinks()) { 4419// updateMtu(lp, null); 4420// } 4421 updateTcpBufferSizes(networkAgent); 4422 4423 updateRoutes(newLp, oldLp, netId); 4424 updateDnses(newLp, oldLp, netId); 4425 4426 // Start or stop clat accordingly to network state. 4427 networkAgent.updateClat(mNetd); 4428 if (isDefaultNetwork(networkAgent)) { 4429 handleApplyDefaultProxy(newLp.getHttpProxy()); 4430 } else { 4431 updateProxy(newLp, oldLp, networkAgent); 4432 } 4433 // TODO - move this check to cover the whole function 4434 if (!Objects.equals(newLp, oldLp)) { 4435 notifyIfacesChangedForNetworkStats(); 4436 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4437 } 4438 4439 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4440 } 4441 4442 private void wakeupModifyInterface(String iface, NetworkCapabilities caps, boolean add) { 4443 // Marks are only available on WiFi interaces. Checking for 4444 // marks on unsupported interfaces is harmless. 4445 if (!caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) { 4446 return; 4447 } 4448 4449 int mark = mContext.getResources().getInteger( 4450 com.android.internal.R.integer.config_networkWakeupPacketMark); 4451 int mask = mContext.getResources().getInteger( 4452 com.android.internal.R.integer.config_networkWakeupPacketMask); 4453 4454 // Mask/mark of zero will not detect anything interesting. 4455 // Don't install rules unless both values are nonzero. 4456 if (mark == 0 || mask == 0) { 4457 return; 4458 } 4459 4460 final String prefix = "iface:" + iface; 4461 try { 4462 if (add) { 4463 mNetd.getNetdService().wakeupAddInterface(iface, prefix, mark, mask); 4464 } else { 4465 mNetd.getNetdService().wakeupDelInterface(iface, prefix, mark, mask); 4466 } 4467 } catch (Exception e) { 4468 loge("Exception modifying wakeup packet monitoring: " + e); 4469 } 4470 4471 } 4472 4473 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId, 4474 NetworkCapabilities caps) { 4475 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4476 if (oldLp != null) { 4477 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4478 } else if (newLp != null) { 4479 interfaceDiff.added = newLp.getAllInterfaceNames(); 4480 } 4481 for (String iface : interfaceDiff.added) { 4482 try { 4483 if (DBG) log("Adding iface " + iface + " to network " + netId); 4484 mNetd.addInterfaceToNetwork(iface, netId); 4485 wakeupModifyInterface(iface, caps, true); 4486 } catch (Exception e) { 4487 loge("Exception adding interface: " + e); 4488 } 4489 } 4490 for (String iface : interfaceDiff.removed) { 4491 try { 4492 if (DBG) log("Removing iface " + iface + " from network " + netId); 4493 wakeupModifyInterface(iface, caps, false); 4494 mNetd.removeInterfaceFromNetwork(iface, netId); 4495 } catch (Exception e) { 4496 loge("Exception removing interface: " + e); 4497 } 4498 } 4499 } 4500 4501 /** 4502 * Have netd update routes from oldLp to newLp. 4503 * @return true if routes changed between oldLp and newLp 4504 */ 4505 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4506 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4507 if (oldLp != null) { 4508 routeDiff = oldLp.compareAllRoutes(newLp); 4509 } else if (newLp != null) { 4510 routeDiff.added = newLp.getAllRoutes(); 4511 } 4512 4513 // add routes before removing old in case it helps with continuous connectivity 4514 4515 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4516 for (RouteInfo route : routeDiff.added) { 4517 if (route.hasGateway()) continue; 4518 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4519 try { 4520 mNetd.addRoute(netId, route); 4521 } catch (Exception e) { 4522 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4523 loge("Exception in addRoute for non-gateway: " + e); 4524 } 4525 } 4526 } 4527 for (RouteInfo route : routeDiff.added) { 4528 if (route.hasGateway() == false) continue; 4529 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4530 try { 4531 mNetd.addRoute(netId, route); 4532 } catch (Exception e) { 4533 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4534 loge("Exception in addRoute for gateway: " + e); 4535 } 4536 } 4537 } 4538 4539 for (RouteInfo route : routeDiff.removed) { 4540 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4541 try { 4542 mNetd.removeRoute(netId, route); 4543 } catch (Exception e) { 4544 loge("Exception in removeRoute: " + e); 4545 } 4546 } 4547 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4548 } 4549 4550 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4551 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4552 return; // no updating necessary 4553 } 4554 4555 Collection<InetAddress> dnses = newLp.getDnsServers(); 4556 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4557 try { 4558 mNetd.setDnsConfigurationForNetwork( 4559 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4560 } catch (Exception e) { 4561 loge("Exception in setDnsConfigurationForNetwork: " + e); 4562 } 4563 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4564 if (defaultNai != null && defaultNai.network.netId == netId) { 4565 setDefaultDnsSystemProperties(dnses); 4566 } 4567 flushVmDnsCache(); 4568 } 4569 4570 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4571 int last = 0; 4572 for (InetAddress dns : dnses) { 4573 ++last; 4574 setNetDnsProperty(last, dns.getHostAddress()); 4575 } 4576 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4577 setNetDnsProperty(i, ""); 4578 } 4579 mNumDnsEntries = last; 4580 } 4581 4582 private void setNetDnsProperty(int which, String value) { 4583 final String key = "net.dns" + which; 4584 // Log and forget errors setting unsupported properties. 4585 try { 4586 mSystemProperties.set(key, value); 4587 } catch (Exception e) { 4588 Log.e(TAG, "Error setting unsupported net.dns property: ", e); 4589 } 4590 } 4591 4592 private String getNetworkPermission(NetworkCapabilities nc) { 4593 // TODO: make these permission strings AIDL constants instead. 4594 if (!nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4595 return NetworkManagementService.PERMISSION_SYSTEM; 4596 } 4597 if (!nc.hasCapability(NET_CAPABILITY_FOREGROUND)) { 4598 return NetworkManagementService.PERMISSION_NETWORK; 4599 } 4600 return null; 4601 } 4602 4603 /** 4604 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4605 * augmented with any stateful capabilities implied from {@code networkAgent} 4606 * (e.g., validated status and captive portal status). 4607 * 4608 * @param oldScore score of the network before any of the changes that prompted us 4609 * to call this function. 4610 * @param nai the network having its capabilities updated. 4611 * @param networkCapabilities the new network capabilities. 4612 */ 4613 private void updateCapabilities( 4614 int oldScore, NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4615 // Once a NetworkAgent is connected, complain if some immutable capabilities are removed. 4616 if (nai.everConnected && !nai.networkCapabilities.satisfiedByImmutableNetworkCapabilities( 4617 networkCapabilities)) { 4618 // TODO: consider not complaining when a network agent degrade its capabilities if this 4619 // does not cause any request (that is not a listen) currently matching that agent to 4620 // stop being matched by the updated agent. 4621 String diff = nai.networkCapabilities.describeImmutableDifferences(networkCapabilities); 4622 if (!TextUtils.isEmpty(diff)) { 4623 Slog.wtf(TAG, "BUG: " + nai + " lost immutable capabilities:" + diff); 4624 } 4625 } 4626 4627 // Don't modify caller's NetworkCapabilities. 4628 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4629 if (nai.lastValidated) { 4630 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4631 } else { 4632 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4633 } 4634 if (nai.lastCaptivePortalDetected) { 4635 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4636 } else { 4637 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4638 } 4639 if (nai.isBackgroundNetwork()) { 4640 networkCapabilities.removeCapability(NET_CAPABILITY_FOREGROUND); 4641 } else { 4642 networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 4643 } 4644 4645 if (Objects.equals(nai.networkCapabilities, networkCapabilities)) return; 4646 4647 final String oldPermission = getNetworkPermission(nai.networkCapabilities); 4648 final String newPermission = getNetworkPermission(networkCapabilities); 4649 if (!Objects.equals(oldPermission, newPermission) && nai.created && !nai.isVPN()) { 4650 try { 4651 mNetd.setNetworkPermission(nai.network.netId, newPermission); 4652 } catch (RemoteException e) { 4653 loge("Exception in setNetworkPermission: " + e); 4654 } 4655 } 4656 4657 final NetworkCapabilities prevNc = nai.networkCapabilities; 4658 synchronized (nai) { 4659 nai.networkCapabilities = networkCapabilities; 4660 } 4661 if (nai.getCurrentScore() == oldScore && 4662 networkCapabilities.equalRequestableCapabilities(prevNc)) { 4663 // If the requestable capabilities haven't changed, and the score hasn't changed, then 4664 // the change we're processing can't affect any requests, it can only affect the listens 4665 // on this network. We might have been called by rematchNetworkAndRequests when a 4666 // network changed foreground state. 4667 processListenRequests(nai, true); 4668 } else { 4669 // If the requestable capabilities have changed or the score changed, we can't have been 4670 // called by rematchNetworkAndRequests, so it's safe to start a rematch. 4671 rematchAllNetworksAndRequests(nai, oldScore); 4672 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4673 } 4674 } 4675 4676 public void handleUpdateLinkProperties(NetworkAgentInfo nai, LinkProperties newLp) { 4677 if (mNetworkForNetId.get(nai.network.netId) != nai) { 4678 // Ignore updates for disconnected networks 4679 return; 4680 } 4681 // newLp is already a defensive copy. 4682 newLp.ensureDirectlyConnectedRoutes(); 4683 if (VDBG) { 4684 log("Update of LinkProperties for " + nai.name() + 4685 "; created=" + nai.created + 4686 "; everConnected=" + nai.everConnected); 4687 } 4688 LinkProperties oldLp = nai.linkProperties; 4689 synchronized (nai) { 4690 nai.linkProperties = newLp; 4691 } 4692 if (nai.everConnected) { 4693 updateLinkProperties(nai, oldLp); 4694 } 4695 } 4696 4697 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4698 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4699 NetworkRequest nr = nai.requestAt(i); 4700 // Don't send listening requests to factories. b/17393458 4701 if (nr.isListen()) continue; 4702 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4703 } 4704 } 4705 4706 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4707 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4708 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4709 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4710 networkRequest); 4711 } 4712 } 4713 4714 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4715 int notificationType) { 4716 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4717 Intent intent = new Intent(); 4718 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4719 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4720 nri.mPendingIntentSent = true; 4721 sendIntent(nri.mPendingIntent, intent); 4722 } 4723 // else not handled 4724 } 4725 4726 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4727 mPendingIntentWakeLock.acquire(); 4728 try { 4729 if (DBG) log("Sending " + pendingIntent); 4730 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4731 } catch (PendingIntent.CanceledException e) { 4732 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4733 mPendingIntentWakeLock.release(); 4734 releasePendingNetworkRequest(pendingIntent); 4735 } 4736 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4737 } 4738 4739 @Override 4740 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4741 String resultData, Bundle resultExtras) { 4742 if (DBG) log("Finished sending " + pendingIntent); 4743 mPendingIntentWakeLock.release(); 4744 // Release with a delay so the receiving client has an opportunity to put in its 4745 // own request. 4746 releasePendingNetworkRequestWithDelay(pendingIntent); 4747 } 4748 4749 private static void callCallbackForRequest(NetworkRequestInfo nri, 4750 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 4751 if (nri.messenger == null) { 4752 return; // Default request has no msgr 4753 } 4754 Bundle bundle = new Bundle(); 4755 // TODO: check if defensive copies of data is needed. 4756 putParcelable(bundle, new NetworkRequest(nri.request)); 4757 Message msg = Message.obtain(); 4758 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL) { 4759 putParcelable(bundle, networkAgent.network); 4760 } 4761 switch (notificationType) { 4762 case ConnectivityManager.CALLBACK_LOSING: { 4763 msg.arg1 = arg1; 4764 break; 4765 } 4766 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4767 putParcelable(bundle, new NetworkCapabilities(networkAgent.networkCapabilities)); 4768 break; 4769 } 4770 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4771 putParcelable(bundle, new LinkProperties(networkAgent.linkProperties)); 4772 break; 4773 } 4774 } 4775 msg.what = notificationType; 4776 msg.setData(bundle); 4777 try { 4778 if (VDBG) { 4779 String notification = ConnectivityManager.getCallbackName(notificationType); 4780 log("sending notification " + notification + " for " + nri.request); 4781 } 4782 nri.messenger.send(msg); 4783 } catch (RemoteException e) { 4784 // may occur naturally in the race of binder death. 4785 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4786 } 4787 } 4788 4789 private static <T extends Parcelable> void putParcelable(Bundle bundle, T t) { 4790 bundle.putParcelable(t.getClass().getSimpleName(), t); 4791 } 4792 4793 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4794 if (nai.numRequestNetworkRequests() != 0) { 4795 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4796 NetworkRequest nr = nai.requestAt(i); 4797 // Ignore listening requests. 4798 if (nr.isListen()) continue; 4799 loge("Dead network still had at least " + nr); 4800 break; 4801 } 4802 } 4803 nai.asyncChannel.disconnect(); 4804 } 4805 4806 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4807 if (oldNetwork == null) { 4808 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4809 return; 4810 } 4811 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4812 4813 // If we get here it means that the last linger timeout for this network expired. So there 4814 // must be no other active linger timers, and we must stop lingering. 4815 oldNetwork.clearLingerState(); 4816 4817 if (unneeded(oldNetwork, UnneededFor.TEARDOWN)) { 4818 // Tear the network down. 4819 teardownUnneededNetwork(oldNetwork); 4820 } else { 4821 // Put the network in the background. 4822 updateCapabilities(oldNetwork.getCurrentScore(), oldNetwork, 4823 oldNetwork.networkCapabilities); 4824 } 4825 } 4826 4827 private void makeDefault(NetworkAgentInfo newNetwork) { 4828 if (DBG) log("Switching to new default network: " + newNetwork); 4829 setupDataActivityTracking(newNetwork); 4830 try { 4831 mNetd.setDefaultNetId(newNetwork.network.netId); 4832 } catch (Exception e) { 4833 loge("Exception setting default network :" + e); 4834 } 4835 notifyLockdownVpn(newNetwork); 4836 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4837 updateTcpBufferSizes(newNetwork); 4838 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4839 } 4840 4841 private void processListenRequests(NetworkAgentInfo nai, boolean capabilitiesChanged) { 4842 // For consistency with previous behaviour, send onLost callbacks before onAvailable. 4843 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4844 NetworkRequest nr = nri.request; 4845 if (!nr.isListen()) continue; 4846 if (nai.isSatisfyingRequest(nr.requestId) && !nai.satisfies(nr)) { 4847 nai.removeRequest(nri.request.requestId); 4848 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_LOST, 0); 4849 } 4850 } 4851 4852 if (capabilitiesChanged) { 4853 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4854 } 4855 4856 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4857 NetworkRequest nr = nri.request; 4858 if (!nr.isListen()) continue; 4859 if (nai.satisfies(nr) && !nai.isSatisfyingRequest(nr.requestId)) { 4860 nai.addRequest(nr); 4861 notifyNetworkAvailable(nai, nri); 4862 } 4863 } 4864 } 4865 4866 // Handles a network appearing or improving its score. 4867 // 4868 // - Evaluates all current NetworkRequests that can be 4869 // satisfied by newNetwork, and reassigns to newNetwork 4870 // any such requests for which newNetwork is the best. 4871 // 4872 // - Lingers any validated Networks that as a result are no longer 4873 // needed. A network is needed if it is the best network for 4874 // one or more NetworkRequests, or if it is a VPN. 4875 // 4876 // - Tears down newNetwork if it just became validated 4877 // but turns out to be unneeded. 4878 // 4879 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4880 // networks that have no chance (i.e. even if validated) 4881 // of becoming the highest scoring network. 4882 // 4883 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4884 // it does not remove NetworkRequests that other Networks could better satisfy. 4885 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4886 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4887 // as it performs better by a factor of the number of Networks. 4888 // 4889 // @param newNetwork is the network to be matched against NetworkRequests. 4890 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4891 // performed to tear down unvalidated networks that have no chance (i.e. even if 4892 // validated) of becoming the highest scoring network. 4893 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4894 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 4895 if (!newNetwork.everConnected) return; 4896 boolean keep = newNetwork.isVPN(); 4897 boolean isNewDefault = false; 4898 NetworkAgentInfo oldDefaultNetwork = null; 4899 4900 final boolean wasBackgroundNetwork = newNetwork.isBackgroundNetwork(); 4901 final int score = newNetwork.getCurrentScore(); 4902 4903 if (VDBG) log("rematching " + newNetwork.name()); 4904 4905 // Find and migrate to this Network any NetworkRequests for 4906 // which this network is now the best. 4907 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4908 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4909 NetworkCapabilities nc = newNetwork.networkCapabilities; 4910 if (VDBG) log(" network has: " + nc); 4911 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4912 // Process requests in the first pass and listens in the second pass. This allows us to 4913 // change a network's capabilities depending on which requests it has. This is only 4914 // correct if the change in capabilities doesn't affect whether the network satisfies 4915 // requests or not, and doesn't affect the network's score. 4916 if (nri.request.isListen()) continue; 4917 4918 final NetworkAgentInfo currentNetwork = getNetworkForRequest(nri.request.requestId); 4919 final boolean satisfies = newNetwork.satisfies(nri.request); 4920 if (newNetwork == currentNetwork && satisfies) { 4921 if (VDBG) { 4922 log("Network " + newNetwork.name() + " was already satisfying" + 4923 " request " + nri.request.requestId + ". No change."); 4924 } 4925 keep = true; 4926 continue; 4927 } 4928 4929 // check if it satisfies the NetworkCapabilities 4930 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4931 if (satisfies) { 4932 // next check if it's better than any current network we're using for 4933 // this request 4934 if (VDBG) { 4935 log("currentScore = " + 4936 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4937 ", newScore = " + score); 4938 } 4939 if (currentNetwork == null || currentNetwork.getCurrentScore() < score) { 4940 if (VDBG) log("rematch for " + newNetwork.name()); 4941 if (currentNetwork != null) { 4942 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4943 currentNetwork.removeRequest(nri.request.requestId); 4944 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 4945 affectedNetworks.add(currentNetwork); 4946 } else { 4947 if (VDBG) log(" accepting network in place of null"); 4948 } 4949 newNetwork.unlingerRequest(nri.request); 4950 setNetworkForRequest(nri.request.requestId, newNetwork); 4951 if (!newNetwork.addRequest(nri.request)) { 4952 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4953 } 4954 addedRequests.add(nri); 4955 keep = true; 4956 // Tell NetworkFactories about the new score, so they can stop 4957 // trying to connect if they know they cannot match it. 4958 // TODO - this could get expensive if we have alot of requests for this 4959 // network. Think about if there is a way to reduce this. Push 4960 // netid->request mapping to each factory? 4961 sendUpdatedScoreToFactories(nri.request, score); 4962 if (isDefaultRequest(nri)) { 4963 isNewDefault = true; 4964 oldDefaultNetwork = currentNetwork; 4965 if (currentNetwork != null) { 4966 mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork); 4967 } 4968 } 4969 } 4970 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 4971 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4972 // mark it as no longer satisfying "nri". Because networks are processed by 4973 // rematchAllNetworksAndRequests() in descending score order, "currentNetwork" will 4974 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4975 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4976 // This means this code doesn't have to handle the case where "currentNetwork" no 4977 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4978 if (DBG) { 4979 log("Network " + newNetwork.name() + " stopped satisfying" + 4980 " request " + nri.request.requestId); 4981 } 4982 newNetwork.removeRequest(nri.request.requestId); 4983 if (currentNetwork == newNetwork) { 4984 clearNetworkForRequest(nri.request.requestId); 4985 sendUpdatedScoreToFactories(nri.request, 0); 4986 } else { 4987 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4988 newNetwork.name() + 4989 " without updating mNetworkForRequestId or factories!"); 4990 } 4991 // TODO: Technically, sending CALLBACK_LOST here is 4992 // incorrect if there is a replacement network currently 4993 // connected that can satisfy nri, which is a request 4994 // (not a listen). However, the only capability that can both 4995 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4996 // so this code is only incorrect for a network that loses 4997 // the TRUSTED capability, which is a rare case. 4998 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 4999 } 5000 } 5001 if (isNewDefault) { 5002 // Notify system services that this network is up. 5003 makeDefault(newNetwork); 5004 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 5005 logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); 5006 // Have a new default network, release the transition wakelock in 5007 scheduleReleaseNetworkTransitionWakelock(); 5008 } 5009 5010 if (!newNetwork.networkCapabilities.equalRequestableCapabilities(nc)) { 5011 Slog.wtf(TAG, String.format( 5012 "BUG: %s changed requestable capabilities during rematch: %s -> %s", 5013 newNetwork.name(), nc, newNetwork.networkCapabilities)); 5014 } 5015 if (newNetwork.getCurrentScore() != score) { 5016 Slog.wtf(TAG, String.format( 5017 "BUG: %s changed score during rematch: %d -> %d", 5018 newNetwork.name(), score, newNetwork.getCurrentScore())); 5019 } 5020 5021 // Second pass: process all listens. 5022 if (wasBackgroundNetwork != newNetwork.isBackgroundNetwork()) { 5023 // If the network went from background to foreground or vice versa, we need to update 5024 // its foreground state. It is safe to do this after rematching the requests because 5025 // NET_CAPABILITY_FOREGROUND does not affect requests, as is not a requestable 5026 // capability and does not affect the network's score (see the Slog.wtf call above). 5027 updateCapabilities(score, newNetwork, newNetwork.networkCapabilities); 5028 } else { 5029 processListenRequests(newNetwork, false); 5030 } 5031 5032 // do this after the default net is switched, but 5033 // before LegacyTypeTracker sends legacy broadcasts 5034 for (NetworkRequestInfo nri : addedRequests) notifyNetworkAvailable(newNetwork, nri); 5035 5036 // Linger any networks that are no longer needed. This should be done after sending the 5037 // available callback for newNetwork. 5038 for (NetworkAgentInfo nai : affectedNetworks) { 5039 updateLingerState(nai, now); 5040 } 5041 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 5042 // does not need to be done in any particular order. 5043 updateLingerState(newNetwork, now); 5044 5045 if (isNewDefault) { 5046 // Maintain the illusion: since the legacy API only 5047 // understands one network at a time, we must pretend 5048 // that the current default network disconnected before 5049 // the new one connected. 5050 if (oldDefaultNetwork != null) { 5051 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 5052 oldDefaultNetwork, true); 5053 } 5054 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 5055 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 5056 notifyLockdownVpn(newNetwork); 5057 } 5058 5059 if (keep) { 5060 // Notify battery stats service about this network, both the normal 5061 // interface and any stacked links. 5062 // TODO: Avoid redoing this; this must only be done once when a network comes online. 5063 try { 5064 final IBatteryStats bs = BatteryStatsService.getService(); 5065 final int type = newNetwork.networkInfo.getType(); 5066 5067 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 5068 bs.noteNetworkInterfaceType(baseIface, type); 5069 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 5070 final String stackedIface = stacked.getInterfaceName(); 5071 bs.noteNetworkInterfaceType(stackedIface, type); 5072 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 5073 } 5074 } catch (RemoteException ignored) { 5075 } 5076 5077 // This has to happen after the notifyNetworkCallbacks as that tickles each 5078 // ConnectivityManager instance so that legacy requests correctly bind dns 5079 // requests to this network. The legacy users are listening for this bcast 5080 // and will generally do a dns request so they can ensureRouteToHost and if 5081 // they do that before the callbacks happen they'll use the default network. 5082 // 5083 // TODO: Is there still a race here? We send the broadcast 5084 // after sending the callback, but if the app can receive the 5085 // broadcast before the callback, it might still break. 5086 // 5087 // This *does* introduce a race where if the user uses the new api 5088 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 5089 // they may get old info. Reverse this after the old startUsing api is removed. 5090 // This is on top of the multiple intent sequencing referenced in the todo above. 5091 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 5092 NetworkRequest nr = newNetwork.requestAt(i); 5093 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 5094 // legacy type tracker filters out repeat adds 5095 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 5096 } 5097 } 5098 5099 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 5100 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 5101 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 5102 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 5103 if (newNetwork.isVPN()) { 5104 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 5105 } 5106 } 5107 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 5108 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 5109 if (unneeded(nai, UnneededFor.TEARDOWN)) { 5110 if (nai.getLingerExpiry() > 0) { 5111 // This network has active linger timers and no requests, but is not 5112 // lingering. Linger it. 5113 // 5114 // One way (the only way?) this can happen if this network is unvalidated 5115 // and became unneeded due to another network improving its score to the 5116 // point where this network will no longer be able to satisfy any requests 5117 // even if it validates. 5118 updateLingerState(nai, now); 5119 } else { 5120 if (DBG) log("Reaping " + nai.name()); 5121 teardownUnneededNetwork(nai); 5122 } 5123 } 5124 } 5125 } 5126 } 5127 5128 /** 5129 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 5130 * being disconnected. 5131 * @param changed If only one Network's score or capabilities have been modified since the last 5132 * time this function was called, pass this Network in this argument, otherwise pass 5133 * null. 5134 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 5135 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 5136 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 5137 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 5138 * network's score. 5139 */ 5140 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 5141 // TODO: This may get slow. The "changed" parameter is provided for future optimization 5142 // to avoid the slowness. It is not simply enough to process just "changed", for 5143 // example in the case where "changed"'s score decreases and another network should begin 5144 // satifying a NetworkRequest that "changed" currently satisfies. 5145 5146 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 5147 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 5148 // rematchNetworkAndRequests() handles. 5149 final long now = SystemClock.elapsedRealtime(); 5150 if (changed != null && oldScore < changed.getCurrentScore()) { 5151 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 5152 } else { 5153 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 5154 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 5155 // Rematch higher scoring networks first to prevent requests first matching a lower 5156 // scoring network and then a higher scoring network, which could produce multiple 5157 // callbacks and inadvertently unlinger networks. 5158 Arrays.sort(nais); 5159 for (NetworkAgentInfo nai : nais) { 5160 rematchNetworkAndRequests(nai, 5161 // Only reap the last time through the loop. Reaping before all rematching 5162 // is complete could incorrectly teardown a network that hasn't yet been 5163 // rematched. 5164 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 5165 : ReapUnvalidatedNetworks.REAP, 5166 now); 5167 } 5168 } 5169 } 5170 5171 private void updateInetCondition(NetworkAgentInfo nai) { 5172 // Don't bother updating until we've graduated to validated at least once. 5173 if (!nai.everValidated) return; 5174 // For now only update icons for default connection. 5175 // TODO: Update WiFi and cellular icons separately. b/17237507 5176 if (!isDefaultNetwork(nai)) return; 5177 5178 int newInetCondition = nai.lastValidated ? 100 : 0; 5179 // Don't repeat publish. 5180 if (newInetCondition == mDefaultInetConditionPublished) return; 5181 5182 mDefaultInetConditionPublished = newInetCondition; 5183 sendInetConditionBroadcast(nai.networkInfo); 5184 } 5185 5186 private void notifyLockdownVpn(NetworkAgentInfo nai) { 5187 if (mLockdownTracker != null) { 5188 if (nai != null && nai.isVPN()) { 5189 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 5190 } else { 5191 mLockdownTracker.onNetworkInfoChanged(); 5192 } 5193 } 5194 } 5195 5196 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 5197 final NetworkInfo.State state = newInfo.getState(); 5198 NetworkInfo oldInfo = null; 5199 final int oldScore = networkAgent.getCurrentScore(); 5200 synchronized (networkAgent) { 5201 oldInfo = networkAgent.networkInfo; 5202 networkAgent.networkInfo = newInfo; 5203 } 5204 notifyLockdownVpn(networkAgent); 5205 5206 if (oldInfo != null && oldInfo.getState() == state) { 5207 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 5208 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 5209 notifyIfacesChangedForNetworkStats(); 5210 } else if (VDBG) log("ignoring duplicate network state non-change"); 5211 // In either case, no further work should be needed. 5212 return; 5213 } 5214 if (DBG) { 5215 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 5216 (oldInfo == null ? "null" : oldInfo.getState()) + 5217 " to " + state); 5218 } 5219 5220 if (!networkAgent.created 5221 && (state == NetworkInfo.State.CONNECTED 5222 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 5223 5224 // A network that has just connected has zero requests and is thus a foreground network. 5225 networkAgent.networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 5226 5227 try { 5228 // This should never fail. Specifying an already in use NetID will cause failure. 5229 if (networkAgent.isVPN()) { 5230 mNetd.createVirtualNetwork(networkAgent.network.netId, 5231 !networkAgent.linkProperties.getDnsServers().isEmpty(), 5232 (networkAgent.networkMisc == null || 5233 !networkAgent.networkMisc.allowBypass)); 5234 } else { 5235 mNetd.createPhysicalNetwork(networkAgent.network.netId, 5236 getNetworkPermission(networkAgent.networkCapabilities)); 5237 } 5238 } catch (Exception e) { 5239 loge("Error creating network " + networkAgent.network.netId + ": " 5240 + e.getMessage()); 5241 return; 5242 } 5243 networkAgent.created = true; 5244 } 5245 5246 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 5247 networkAgent.everConnected = true; 5248 5249 updateLinkProperties(networkAgent, null); 5250 notifyIfacesChangedForNetworkStats(); 5251 5252 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 5253 scheduleUnvalidatedPrompt(networkAgent); 5254 5255 if (networkAgent.isVPN()) { 5256 // Temporarily disable the default proxy (not global). 5257 synchronized (mProxyLock) { 5258 if (!mDefaultProxyDisabled) { 5259 mDefaultProxyDisabled = true; 5260 if (mGlobalProxy == null && mDefaultProxy != null) { 5261 sendProxyBroadcast(null); 5262 } 5263 } 5264 } 5265 // TODO: support proxy per network. 5266 } 5267 5268 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5269 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5270 // capabilities, so it only needs to be done once on initial connect, not every time the 5271 // network's capabilities change. Note that we do this before rematching the network, 5272 // so we could decide to tear it down immediately afterwards. That's fine though - on 5273 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5274 // doing. 5275 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5276 5277 // Consider network even though it is not yet validated. 5278 final long now = SystemClock.elapsedRealtime(); 5279 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5280 5281 // This has to happen after matching the requests, because callbacks are just requests. 5282 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5283 } else if (state == NetworkInfo.State.DISCONNECTED) { 5284 networkAgent.asyncChannel.disconnect(); 5285 if (networkAgent.isVPN()) { 5286 synchronized (mProxyLock) { 5287 if (mDefaultProxyDisabled) { 5288 mDefaultProxyDisabled = false; 5289 if (mGlobalProxy == null && mDefaultProxy != null) { 5290 sendProxyBroadcast(mDefaultProxy); 5291 } 5292 } 5293 } 5294 } 5295 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5296 state == NetworkInfo.State.SUSPENDED) { 5297 // going into or coming out of SUSPEND: rescore and notify 5298 if (networkAgent.getCurrentScore() != oldScore) { 5299 rematchAllNetworksAndRequests(networkAgent, oldScore); 5300 } 5301 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5302 ConnectivityManager.CALLBACK_SUSPENDED : 5303 ConnectivityManager.CALLBACK_RESUMED)); 5304 mLegacyTypeTracker.update(networkAgent); 5305 } 5306 } 5307 5308 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5309 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5310 if (score < 0) { 5311 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5312 "). Bumping score to min of 0"); 5313 score = 0; 5314 } 5315 5316 final int oldScore = nai.getCurrentScore(); 5317 nai.setCurrentScore(score); 5318 5319 rematchAllNetworksAndRequests(nai, oldScore); 5320 5321 sendUpdatedScoreToFactories(nai); 5322 } 5323 5324 // Notify only this one new request of the current state. Transfer all the 5325 // current state by calling NetworkCapabilities and LinkProperties callbacks 5326 // so that callers can be guaranteed to have as close to atomicity in state 5327 // transfer as can be supported by this current API. 5328 protected void notifyNetworkAvailable(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5329 mHandler.removeMessages(EVENT_TIMEOUT_NETWORK_REQUEST, nri); 5330 if (nri.mPendingIntent != null) { 5331 sendPendingIntentForRequest(nri, nai, ConnectivityManager.CALLBACK_AVAILABLE); 5332 // Attempt no subsequent state pushes where intents are involved. 5333 return; 5334 } 5335 5336 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_AVAILABLE, 0); 5337 // Whether a network is currently suspended is also an important 5338 // element of state to be transferred (it would not otherwise be 5339 // delivered by any currently available mechanism). 5340 if (nai.networkInfo.getState() == NetworkInfo.State.SUSPENDED) { 5341 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_SUSPENDED, 0); 5342 } 5343 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_CAP_CHANGED, 0); 5344 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_IP_CHANGED, 0); 5345 } 5346 5347 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5348 // The NetworkInfo we actually send out has no bearing on the real 5349 // state of affairs. For example, if the default connection is mobile, 5350 // and a request for HIPRI has just gone away, we need to pretend that 5351 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5352 // the state to DISCONNECTED, even though the network is of type MOBILE 5353 // and is still connected. 5354 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5355 info.setType(type); 5356 if (state != DetailedState.DISCONNECTED) { 5357 info.setDetailedState(state, null, info.getExtraInfo()); 5358 sendConnectedBroadcast(info); 5359 } else { 5360 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5361 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5362 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5363 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5364 if (info.isFailover()) { 5365 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5366 nai.networkInfo.setFailover(false); 5367 } 5368 if (info.getReason() != null) { 5369 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5370 } 5371 if (info.getExtraInfo() != null) { 5372 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5373 } 5374 NetworkAgentInfo newDefaultAgent = null; 5375 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5376 newDefaultAgent = getDefaultNetwork(); 5377 if (newDefaultAgent != null) { 5378 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5379 newDefaultAgent.networkInfo); 5380 } else { 5381 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5382 } 5383 } 5384 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5385 mDefaultInetConditionPublished); 5386 sendStickyBroadcast(intent); 5387 if (newDefaultAgent != null) { 5388 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5389 } 5390 } 5391 } 5392 5393 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5394 if (VDBG) { 5395 String notification = ConnectivityManager.getCallbackName(notifyType); 5396 log("notifyType " + notification + " for " + networkAgent.name()); 5397 } 5398 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5399 NetworkRequest nr = networkAgent.requestAt(i); 5400 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5401 if (VDBG) log(" sending notification for " + nr); 5402 // TODO: if we're in the middle of a rematch, can we send a CAP_CHANGED callback for 5403 // a network that no longer satisfies the listen? 5404 if (nri.mPendingIntent == null) { 5405 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5406 } else { 5407 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5408 } 5409 } 5410 } 5411 5412 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5413 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5414 } 5415 5416 /** 5417 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5418 * properties tracked by NetworkStatsService on an active iface has changed. 5419 */ 5420 private void notifyIfacesChangedForNetworkStats() { 5421 try { 5422 mStatsService.forceUpdateIfaces(); 5423 } catch (Exception ignored) { 5424 } 5425 } 5426 5427 @Override 5428 public boolean addVpnAddress(String address, int prefixLength) { 5429 throwIfLockdownEnabled(); 5430 int user = UserHandle.getUserId(Binder.getCallingUid()); 5431 synchronized (mVpns) { 5432 return mVpns.get(user).addAddress(address, prefixLength); 5433 } 5434 } 5435 5436 @Override 5437 public boolean removeVpnAddress(String address, int prefixLength) { 5438 throwIfLockdownEnabled(); 5439 int user = UserHandle.getUserId(Binder.getCallingUid()); 5440 synchronized (mVpns) { 5441 return mVpns.get(user).removeAddress(address, prefixLength); 5442 } 5443 } 5444 5445 @Override 5446 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5447 throwIfLockdownEnabled(); 5448 int user = UserHandle.getUserId(Binder.getCallingUid()); 5449 boolean success; 5450 synchronized (mVpns) { 5451 success = mVpns.get(user).setUnderlyingNetworks(networks); 5452 } 5453 if (success) { 5454 notifyIfacesChangedForNetworkStats(); 5455 } 5456 return success; 5457 } 5458 5459 @Override 5460 public String getCaptivePortalServerUrl() { 5461 enforceConnectivityInternalPermission(); 5462 return NetworkMonitor.getCaptivePortalServerHttpUrl(mContext); 5463 } 5464 5465 @Override 5466 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5467 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5468 enforceKeepalivePermission(); 5469 mKeepaliveTracker.startNattKeepalive( 5470 getNetworkAgentInfoForNetwork(network), 5471 intervalSeconds, messenger, binder, 5472 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5473 } 5474 5475 @Override 5476 public void stopKeepalive(Network network, int slot) { 5477 mHandler.sendMessage(mHandler.obtainMessage( 5478 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5479 } 5480 5481 @Override 5482 public void factoryReset() { 5483 enforceConnectivityInternalPermission(); 5484 5485 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5486 return; 5487 } 5488 5489 final int userId = UserHandle.getCallingUserId(); 5490 5491 // Turn airplane mode off 5492 setAirplaneMode(false); 5493 5494 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5495 // Untether 5496 String pkgName = mContext.getOpPackageName(); 5497 for (String tether : getTetheredIfaces()) { 5498 untether(tether, pkgName); 5499 } 5500 } 5501 5502 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5503 // Remove always-on package 5504 synchronized (mVpns) { 5505 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5506 if (alwaysOnPackage != null) { 5507 setAlwaysOnVpnPackage(userId, null, false); 5508 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5509 } 5510 } 5511 5512 // Turn Always-on VPN off 5513 if (mLockdownEnabled && userId == UserHandle.USER_SYSTEM) { 5514 final long ident = Binder.clearCallingIdentity(); 5515 try { 5516 mKeyStore.delete(Credentials.LOCKDOWN_VPN); 5517 mLockdownEnabled = false; 5518 setLockdownTracker(null); 5519 } finally { 5520 Binder.restoreCallingIdentity(ident); 5521 } 5522 } 5523 5524 // Turn VPN off 5525 VpnConfig vpnConfig = getVpnConfig(userId); 5526 if (vpnConfig != null) { 5527 if (vpnConfig.legacy) { 5528 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5529 } else { 5530 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5531 // in the future without user intervention. 5532 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5533 5534 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5535 } 5536 } 5537 } 5538 5539 Settings.Global.putString(mContext.getContentResolver(), 5540 Settings.Global.NETWORK_AVOID_BAD_WIFI, null); 5541 } 5542 5543 @VisibleForTesting 5544 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5545 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5546 return new NetworkMonitor(context, handler, nai, defaultRequest); 5547 } 5548 5549 @VisibleForTesting 5550 MultinetworkPolicyTracker createMultinetworkPolicyTracker(Context c, Handler h, Runnable r) { 5551 return new MultinetworkPolicyTracker(c, h, r); 5552 } 5553 5554 @VisibleForTesting 5555 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5556 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5557 } 5558 5559 @VisibleForTesting 5560 public boolean hasService(String name) { 5561 return ServiceManager.checkService(name) != null; 5562 } 5563 5564 private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5565 int newNetid = NETID_UNSET; 5566 int prevNetid = NETID_UNSET; 5567 int[] transports = new int[0]; 5568 boolean hadIPv4 = false; 5569 boolean hadIPv6 = false; 5570 5571 if (newNai != null) { 5572 newNetid = newNai.network.netId; 5573 transports = newNai.networkCapabilities.getTransportTypes(); 5574 } 5575 if (prevNai != null) { 5576 prevNetid = prevNai.network.netId; 5577 final LinkProperties lp = prevNai.linkProperties; 5578 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5579 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5580 } 5581 5582 mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); 5583 } 5584 5585 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5586 mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); 5587 } 5588 5589 private static boolean toBool(int encodedBoolean) { 5590 return encodedBoolean != 0; // Only 0 means false. 5591 } 5592 5593 private static int encodeBool(boolean b) { 5594 return b ? 1 : 0; 5595 } 5596} 5597