ConnectivityService.java revision 5526f9c78c6fcad500c272ef14b7403e3395525e
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 31import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 32import static android.net.NetworkPolicyManager.RULE_ALLOW_METERED; 33import static android.net.NetworkPolicyManager.RULE_NONE; 34import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 35import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 36import static android.net.NetworkPolicyManager.RULE_TEMPORARY_ALLOW_METERED; 37import static android.net.NetworkPolicyManager.uidRulesToString; 38 39import android.annotation.Nullable; 40import android.app.BroadcastOptions; 41import android.app.NotificationManager; 42import android.app.PendingIntent; 43import android.content.BroadcastReceiver; 44import android.content.ContentResolver; 45import android.content.Context; 46import android.content.Intent; 47import android.content.IntentFilter; 48import android.content.pm.PackageManager; 49import android.content.res.Configuration; 50import android.content.res.Resources; 51import android.database.ContentObserver; 52import android.net.ConnectivityManager; 53import android.net.ConnectivityManager.PacketKeepalive; 54import android.net.IConnectivityManager; 55import android.net.INetworkManagementEventObserver; 56import android.net.INetworkPolicyListener; 57import android.net.INetworkPolicyManager; 58import android.net.INetworkStatsService; 59import android.net.LinkProperties; 60import android.net.LinkProperties.CompareResult; 61import android.net.Network; 62import android.net.NetworkAgent; 63import android.net.NetworkCapabilities; 64import android.net.NetworkConfig; 65import android.net.NetworkInfo; 66import android.net.NetworkInfo.DetailedState; 67import android.net.NetworkMisc; 68import android.net.NetworkQuotaInfo; 69import android.net.NetworkRequest; 70import android.net.NetworkState; 71import android.net.NetworkUtils; 72import android.net.Proxy; 73import android.net.ProxyInfo; 74import android.net.RouteInfo; 75import android.net.UidRange; 76import android.net.Uri; 77import android.net.metrics.DefaultNetworkEvent; 78import android.net.metrics.IpConnectivityLog; 79import android.net.metrics.NetworkEvent; 80import android.os.Binder; 81import android.os.Build; 82import android.os.Bundle; 83import android.os.FileUtils; 84import android.os.Handler; 85import android.os.HandlerThread; 86import android.os.IBinder; 87import android.os.INetworkManagementService; 88import android.os.Looper; 89import android.os.Message; 90import android.os.Messenger; 91import android.os.ParcelFileDescriptor; 92import android.os.PowerManager; 93import android.os.Process; 94import android.os.RemoteException; 95import android.os.ResultReceiver; 96import android.os.SystemClock; 97import android.os.SystemProperties; 98import android.os.UserHandle; 99import android.os.UserManager; 100import android.provider.Settings; 101import android.security.Credentials; 102import android.security.KeyStore; 103import android.telephony.TelephonyManager; 104import android.text.TextUtils; 105import android.util.ArraySet; 106import android.util.LocalLog; 107import android.util.LocalLog.ReadOnlyLocalLog; 108import android.util.Log; 109import android.util.Pair; 110import android.util.Slog; 111import android.util.SparseArray; 112import android.util.SparseBooleanArray; 113import android.util.SparseIntArray; 114import android.util.Xml; 115 116import com.android.internal.R; 117import com.android.internal.annotations.GuardedBy; 118import com.android.internal.annotations.VisibleForTesting; 119import com.android.internal.app.IBatteryStats; 120import com.android.internal.net.LegacyVpnInfo; 121import com.android.internal.net.NetworkStatsFactory; 122import com.android.internal.net.VpnConfig; 123import com.android.internal.net.VpnInfo; 124import com.android.internal.net.VpnProfile; 125import com.android.internal.util.AsyncChannel; 126import com.android.internal.util.IndentingPrintWriter; 127import com.android.internal.util.MessageUtils; 128import com.android.internal.util.WakeupMessage; 129import com.android.internal.util.XmlUtils; 130import com.android.server.am.BatteryStatsService; 131import com.android.server.connectivity.DataConnectionStats; 132import com.android.server.connectivity.KeepaliveTracker; 133import com.android.server.connectivity.Nat464Xlat; 134import com.android.server.connectivity.LingerMonitor; 135import com.android.server.connectivity.NetworkAgentInfo; 136import com.android.server.connectivity.NetworkDiagnostics; 137import com.android.server.connectivity.NetworkMonitor; 138import com.android.server.connectivity.NetworkNotificationManager; 139import com.android.server.connectivity.NetworkNotificationManager.NotificationType; 140import com.android.server.connectivity.PacManager; 141import com.android.server.connectivity.PermissionMonitor; 142import com.android.server.connectivity.Tethering; 143import com.android.server.connectivity.Vpn; 144import com.android.server.net.BaseNetworkObserver; 145import com.android.server.net.LockdownVpnTracker; 146 147import com.google.android.collect.Lists; 148 149import org.xmlpull.v1.XmlPullParser; 150import org.xmlpull.v1.XmlPullParserException; 151 152import java.io.File; 153import java.io.FileDescriptor; 154import java.io.FileNotFoundException; 155import java.io.FileReader; 156import java.io.IOException; 157import java.io.PrintWriter; 158import java.net.Inet4Address; 159import java.net.InetAddress; 160import java.net.UnknownHostException; 161import java.util.ArrayDeque; 162import java.util.ArrayList; 163import java.util.Arrays; 164import java.util.Collection; 165import java.util.HashMap; 166import java.util.HashSet; 167import java.util.List; 168import java.util.Map; 169import java.util.Objects; 170import java.util.SortedSet; 171import java.util.TreeSet; 172 173/** 174 * @hide 175 */ 176public class ConnectivityService extends IConnectivityManager.Stub 177 implements PendingIntent.OnFinished { 178 private static final String TAG = ConnectivityService.class.getSimpleName(); 179 180 private static final boolean DBG = true; 181 private static final boolean VDBG = false; 182 183 private static final boolean LOGD_RULES = false; 184 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 185 186 // TODO: create better separation between radio types and network types 187 188 // how long to wait before switching back to a radio's default network 189 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 190 // system property that can override the above value 191 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 192 "android.telephony.apn-restore"; 193 194 // How long to wait before putting up a "This network doesn't have an Internet connection, 195 // connect anyway?" dialog after the user selects a network that doesn't validate. 196 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 197 198 // Default to 30s linger time-out. Modifiable only for testing. 199 private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; 200 private static final int DEFAULT_LINGER_DELAY_MS = 30_000; 201 @VisibleForTesting 202 protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it. 203 204 // How long to delay to removal of a pending intent based request. 205 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 206 private final int mReleasePendingIntentDelayMs; 207 208 private Tethering mTethering; 209 210 private final PermissionMonitor mPermissionMonitor; 211 212 private KeyStore mKeyStore; 213 214 @GuardedBy("mVpns") 215 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 216 217 private boolean mLockdownEnabled; 218 private LockdownVpnTracker mLockdownTracker; 219 220 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 221 private Object mRulesLock = new Object(); 222 /** Currently active network rules by UID. */ 223 @GuardedBy("mRulesLock") 224 private SparseIntArray mUidRules = new SparseIntArray(); 225 /** Set of ifaces that are costly. */ 226 @GuardedBy("mRulesLock") 227 private ArraySet<String> mMeteredIfaces = new ArraySet<>(); 228 /** Flag indicating if background data is restricted. */ 229 @GuardedBy("mRulesLock") 230 private boolean mRestrictBackground; 231 232 final private Context mContext; 233 private int mNetworkPreference; 234 // 0 is full bad, 100 is full good 235 private int mDefaultInetConditionPublished = 0; 236 237 private int mNumDnsEntries; 238 239 private boolean mTestMode; 240 private static ConnectivityService sServiceInstance; 241 242 private INetworkManagementService mNetd; 243 private INetworkStatsService mStatsService; 244 private INetworkPolicyManager mPolicyManager; 245 246 private String mCurrentTcpBufferSizes; 247 248 private static final int ENABLED = 1; 249 private static final int DISABLED = 0; 250 251 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 252 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class, 253 NetworkAgentInfo.class }); 254 255 private enum ReapUnvalidatedNetworks { 256 // Tear down networks that have no chance (e.g. even if validated) of becoming 257 // the highest scoring network satisfying a NetworkRequest. This should be passed when 258 // all networks have been rematched against all NetworkRequests. 259 REAP, 260 // Don't reap networks. This should be passed when some networks have not yet been 261 // rematched against all NetworkRequests. 262 DONT_REAP 263 }; 264 265 /** 266 * used internally to change our mobile data enabled flag 267 */ 268 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 269 270 /** 271 * used internally to clear a wakelock when transitioning 272 * from one net to another. Clear happens when we get a new 273 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 274 * after a timeout if no network is found (typically 1 min). 275 */ 276 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 277 278 /** 279 * used internally to reload global proxy settings 280 */ 281 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 282 283 /** 284 * PAC manager has received new port. 285 */ 286 private static final int EVENT_PROXY_HAS_CHANGED = 16; 287 288 /** 289 * used internally when registering NetworkFactories 290 * obj = NetworkFactoryInfo 291 */ 292 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 293 294 /** 295 * used internally when registering NetworkAgents 296 * obj = Messenger 297 */ 298 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 299 300 /** 301 * used to add a network request 302 * includes a NetworkRequestInfo 303 */ 304 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 305 306 /** 307 * indicates a timeout period is over - check if we had a network yet or not 308 * and if not, call the timeout callback (but leave the request live until they 309 * cancel it. 310 * includes a NetworkRequestInfo 311 */ 312 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 313 314 /** 315 * used to add a network listener - no request 316 * includes a NetworkRequestInfo 317 */ 318 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 319 320 /** 321 * used to remove a network request, either a listener or a real request 322 * arg1 = UID of caller 323 * obj = NetworkRequest 324 */ 325 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 326 327 /** 328 * used internally when registering NetworkFactories 329 * obj = Messenger 330 */ 331 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 332 333 /** 334 * used internally to expire a wakelock when transitioning 335 * from one net to another. Expire happens when we fail to find 336 * a new network (typically after 1 minute) - 337 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 338 * a replacement network. 339 */ 340 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 341 342 /** 343 * Used internally to indicate the system is ready. 344 */ 345 private static final int EVENT_SYSTEM_READY = 25; 346 347 /** 348 * used to add a network request with a pending intent 349 * obj = NetworkRequestInfo 350 */ 351 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 352 353 /** 354 * used to remove a pending intent and its associated network request. 355 * arg1 = UID of caller 356 * obj = PendingIntent 357 */ 358 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 359 360 /** 361 * used to specify whether a network should be used even if unvalidated. 362 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 363 * arg2 = whether to remember this choice in the future (1 or 0) 364 * obj = network 365 */ 366 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 367 368 /** 369 * used to ask the user to confirm a connection to an unvalidated network. 370 * obj = network 371 */ 372 private static final int EVENT_PROMPT_UNVALIDATED = 29; 373 374 /** 375 * used internally to (re)configure mobile data always-on settings. 376 */ 377 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 378 379 /** 380 * used to add a network listener with a pending intent 381 * obj = NetworkRequestInfo 382 */ 383 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 384 385 /** 386 * Indicates a caller has requested to have its callback invoked with 387 * the latest LinkProperties or NetworkCapabilities. 388 * 389 * arg1 = UID of caller 390 * obj = NetworkRequest 391 */ 392 private static final int EVENT_REQUEST_LINKPROPERTIES = 32; 393 private static final int EVENT_REQUEST_NETCAPABILITIES = 33; 394 395 /** Handler thread used for both of the handlers below. */ 396 @VisibleForTesting 397 protected final HandlerThread mHandlerThread; 398 /** Handler used for internal events. */ 399 final private InternalHandler mHandler; 400 /** Handler used for incoming {@link NetworkStateTracker} events. */ 401 final private NetworkStateTrackerHandler mTrackerHandler; 402 403 private boolean mSystemReady; 404 private Intent mInitialBroadcast; 405 406 private PowerManager.WakeLock mNetTransitionWakeLock; 407 private String mNetTransitionWakeLockCausedBy = ""; 408 private int mNetTransitionWakeLockSerialNumber; 409 private int mNetTransitionWakeLockTimeout; 410 private final PowerManager.WakeLock mPendingIntentWakeLock; 411 412 // used in DBG mode to track inet condition reports 413 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 414 private ArrayList mInetLog; 415 416 // track the current default http proxy - tell the world if we get a new one (real change) 417 private volatile ProxyInfo mDefaultProxy = null; 418 private Object mProxyLock = new Object(); 419 private boolean mDefaultProxyDisabled = false; 420 421 // track the global proxy. 422 private ProxyInfo mGlobalProxy = null; 423 424 private PacManager mPacManager = null; 425 426 final private SettingsObserver mSettingsObserver; 427 428 private UserManager mUserManager; 429 430 NetworkConfig[] mNetConfigs; 431 int mNetworksDefined; 432 433 // the set of network types that can only be enabled by system/sig apps 434 List mProtectedNetworks; 435 436 private DataConnectionStats mDataConnectionStats; 437 438 TelephonyManager mTelephonyManager; 439 440 private KeepaliveTracker mKeepaliveTracker; 441 private NetworkNotificationManager mNotifier; 442 private LingerMonitor mLingerMonitor; 443 444 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 445 private final static int MIN_NET_ID = 100; // some reserved marks 446 private final static int MAX_NET_ID = 65535; 447 private int mNextNetId = MIN_NET_ID; 448 449 // sequence number of NetworkRequests 450 private int mNextNetworkRequestId = 1; 451 452 // NetworkRequest activity String log entries. 453 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 454 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 455 456 // NetworkInfo blocked and unblocked String log entries 457 // TODO: consider reducing memory usage. Each log line is ~40 2B chars, for a total of ~8kB. 458 private static final int MAX_NETWORK_INFO_LOGS = 100; 459 private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); 460 461 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 462 private static final int MAX_VALIDATION_LOGS = 10; 463 private static class ValidationLog { 464 final Network mNetwork; 465 final String mNetworkExtraInfo; 466 final ReadOnlyLocalLog mLog; 467 468 ValidationLog(Network network, String networkExtraInfo, ReadOnlyLocalLog log) { 469 mNetwork = network; 470 mNetworkExtraInfo = networkExtraInfo; 471 mLog = log; 472 } 473 } 474 private final ArrayDeque<ValidationLog> mValidationLogs = 475 new ArrayDeque<ValidationLog>(MAX_VALIDATION_LOGS); 476 477 private void addValidationLogs(ReadOnlyLocalLog log, Network network, String networkExtraInfo) { 478 synchronized(mValidationLogs) { 479 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 480 mValidationLogs.removeLast(); 481 } 482 mValidationLogs.addFirst(new ValidationLog(network, networkExtraInfo, log)); 483 } 484 } 485 486 private final IpConnectivityLog mMetricsLog; 487 488 /** 489 * Implements support for the legacy "one network per network type" model. 490 * 491 * We used to have a static array of NetworkStateTrackers, one for each 492 * network type, but that doesn't work any more now that we can have, 493 * for example, more that one wifi network. This class stores all the 494 * NetworkAgentInfo objects that support a given type, but the legacy 495 * API will only see the first one. 496 * 497 * It serves two main purposes: 498 * 499 * 1. Provide information about "the network for a given type" (since this 500 * API only supports one). 501 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 502 * the first network for a given type changes, or if the default network 503 * changes. 504 */ 505 private class LegacyTypeTracker { 506 507 private static final boolean DBG = true; 508 private static final boolean VDBG = false; 509 510 /** 511 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 512 * Each list holds references to all NetworkAgentInfos that are used to 513 * satisfy requests for that network type. 514 * 515 * This array is built out at startup such that an unsupported network 516 * doesn't get an ArrayList instance, making this a tristate: 517 * unsupported, supported but not active and active. 518 * 519 * The actual lists are populated when we scan the network types that 520 * are supported on this device. 521 * 522 * Threading model: 523 * - addSupportedType() is only called in the constructor 524 * - add(), update(), remove() are only called from the ConnectivityService handler thread. 525 * They are therefore not thread-safe with respect to each other. 526 * - getNetworkForType() can be called at any time on binder threads. It is synchronized 527 * on mTypeLists to be thread-safe with respect to a concurrent remove call. 528 * - dump is thread-safe with respect to concurrent add and remove calls. 529 */ 530 private final ArrayList<NetworkAgentInfo> mTypeLists[]; 531 532 public LegacyTypeTracker() { 533 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 534 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 535 } 536 537 public void addSupportedType(int type) { 538 if (mTypeLists[type] != null) { 539 throw new IllegalStateException( 540 "legacy list for type " + type + "already initialized"); 541 } 542 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 543 } 544 545 public boolean isTypeSupported(int type) { 546 return isNetworkTypeValid(type) && mTypeLists[type] != null; 547 } 548 549 public NetworkAgentInfo getNetworkForType(int type) { 550 synchronized (mTypeLists) { 551 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 552 return mTypeLists[type].get(0); 553 } 554 } 555 return null; 556 } 557 558 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 559 boolean isDefaultNetwork) { 560 if (DBG) { 561 log("Sending " + state + 562 " broadcast for type " + type + " " + nai.name() + 563 " isDefaultNetwork=" + isDefaultNetwork); 564 } 565 } 566 567 /** Adds the given network to the specified legacy type list. */ 568 public void add(int type, NetworkAgentInfo nai) { 569 if (!isTypeSupported(type)) { 570 return; // Invalid network type. 571 } 572 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 573 574 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 575 if (list.contains(nai)) { 576 return; 577 } 578 synchronized (mTypeLists) { 579 list.add(nai); 580 } 581 582 // Send a broadcast if this is the first network of its type or if it's the default. 583 final boolean isDefaultNetwork = isDefaultNetwork(nai); 584 if ((list.size() == 1) || isDefaultNetwork) { 585 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 586 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 587 } 588 } 589 590 /** Removes the given network from the specified legacy type list. */ 591 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 592 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 593 if (list == null || list.isEmpty()) { 594 return; 595 } 596 final boolean wasFirstNetwork = list.get(0).equals(nai); 597 598 synchronized (mTypeLists) { 599 if (!list.remove(nai)) { 600 return; 601 } 602 } 603 604 final DetailedState state = DetailedState.DISCONNECTED; 605 606 if (wasFirstNetwork || wasDefault) { 607 maybeLogBroadcast(nai, state, type, wasDefault); 608 sendLegacyNetworkBroadcast(nai, state, type); 609 } 610 611 if (!list.isEmpty() && wasFirstNetwork) { 612 if (DBG) log("Other network available for type " + type + 613 ", sending connected broadcast"); 614 final NetworkAgentInfo replacement = list.get(0); 615 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 616 sendLegacyNetworkBroadcast(replacement, state, type); 617 } 618 } 619 620 /** Removes the given network from all legacy type lists. */ 621 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 622 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 623 for (int type = 0; type < mTypeLists.length; type++) { 624 remove(type, nai, wasDefault); 625 } 626 } 627 628 // send out another legacy broadcast - currently only used for suspend/unsuspend 629 // toggle 630 public void update(NetworkAgentInfo nai) { 631 final boolean isDefault = isDefaultNetwork(nai); 632 final DetailedState state = nai.networkInfo.getDetailedState(); 633 for (int type = 0; type < mTypeLists.length; type++) { 634 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 635 final boolean contains = (list != null && list.contains(nai)); 636 final boolean isFirst = contains && (nai == list.get(0)); 637 if (isFirst || contains && isDefault) { 638 maybeLogBroadcast(nai, state, type, isDefault); 639 sendLegacyNetworkBroadcast(nai, state, type); 640 } 641 } 642 } 643 644 private String naiToString(NetworkAgentInfo nai) { 645 String name = (nai != null) ? nai.name() : "null"; 646 String state = (nai.networkInfo != null) ? 647 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 648 "???/???"; 649 return name + " " + state; 650 } 651 652 public void dump(IndentingPrintWriter pw) { 653 pw.println("mLegacyTypeTracker:"); 654 pw.increaseIndent(); 655 pw.print("Supported types:"); 656 for (int type = 0; type < mTypeLists.length; type++) { 657 if (mTypeLists[type] != null) pw.print(" " + type); 658 } 659 pw.println(); 660 pw.println("Current state:"); 661 pw.increaseIndent(); 662 synchronized (mTypeLists) { 663 for (int type = 0; type < mTypeLists.length; type++) { 664 if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; 665 for (NetworkAgentInfo nai : mTypeLists[type]) { 666 pw.println(type + " " + naiToString(nai)); 667 } 668 } 669 } 670 pw.decreaseIndent(); 671 pw.decreaseIndent(); 672 pw.println(); 673 } 674 } 675 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 676 677 @VisibleForTesting 678 protected HandlerThread createHandlerThread() { 679 return new HandlerThread("ConnectivityServiceThread"); 680 } 681 682 public ConnectivityService(Context context, INetworkManagementService netManager, 683 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 684 this(context, netManager, statsService, policyManager, new IpConnectivityLog()); 685 } 686 687 @VisibleForTesting 688 protected ConnectivityService(Context context, INetworkManagementService netManager, 689 INetworkStatsService statsService, INetworkPolicyManager policyManager, 690 IpConnectivityLog logger) { 691 if (DBG) log("ConnectivityService starting up"); 692 693 mMetricsLog = logger; 694 mDefaultRequest = createInternetRequestForTransport(-1); 695 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); 696 mNetworkRequests.put(mDefaultRequest, defaultNRI); 697 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 698 699 mDefaultMobileDataRequest = createInternetRequestForTransport( 700 NetworkCapabilities.TRANSPORT_CELLULAR); 701 702 mHandlerThread = createHandlerThread(); 703 mHandlerThread.start(); 704 mHandler = new InternalHandler(mHandlerThread.getLooper()); 705 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 706 707 // setup our unique device name 708 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 709 String id = Settings.Secure.getString(context.getContentResolver(), 710 Settings.Secure.ANDROID_ID); 711 if (id != null && id.length() > 0) { 712 String name = new String("android-").concat(id); 713 SystemProperties.set("net.hostname", name); 714 } 715 } 716 717 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 718 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 719 720 mLingerDelayMs = SystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); 721 722 mContext = checkNotNull(context, "missing Context"); 723 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 724 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 725 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 726 mKeyStore = KeyStore.getInstance(); 727 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 728 729 try { 730 mPolicyManager.setConnectivityListener(mPolicyListener); 731 mRestrictBackground = mPolicyManager.getRestrictBackground(); 732 } catch (RemoteException e) { 733 // ouch, no rules updates means some processes may never get network 734 loge("unable to register INetworkPolicyListener" + e); 735 } 736 737 final PowerManager powerManager = (PowerManager) context.getSystemService( 738 Context.POWER_SERVICE); 739 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 740 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 741 com.android.internal.R.integer.config_networkTransitionTimeout); 742 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 743 744 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 745 746 // TODO: What is the "correct" way to do determine if this is a wifi only device? 747 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 748 log("wifiOnly=" + wifiOnly); 749 String[] naStrings = context.getResources().getStringArray( 750 com.android.internal.R.array.networkAttributes); 751 for (String naString : naStrings) { 752 try { 753 NetworkConfig n = new NetworkConfig(naString); 754 if (VDBG) log("naString=" + naString + " config=" + n); 755 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 756 loge("Error in networkAttributes - ignoring attempt to define type " + 757 n.type); 758 continue; 759 } 760 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 761 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 762 n.type); 763 continue; 764 } 765 if (mNetConfigs[n.type] != null) { 766 loge("Error in networkAttributes - ignoring attempt to redefine type " + 767 n.type); 768 continue; 769 } 770 mLegacyTypeTracker.addSupportedType(n.type); 771 772 mNetConfigs[n.type] = n; 773 mNetworksDefined++; 774 } catch(Exception e) { 775 // ignore it - leave the entry null 776 } 777 } 778 779 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 780 if (mNetConfigs[TYPE_VPN] == null) { 781 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 782 // don't need to add TYPE_VPN to mNetConfigs. 783 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 784 mNetworksDefined++; // used only in the log() statement below. 785 } 786 787 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 788 789 mProtectedNetworks = new ArrayList<Integer>(); 790 int[] protectedNetworks = context.getResources().getIntArray( 791 com.android.internal.R.array.config_protectedNetworks); 792 for (int p : protectedNetworks) { 793 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 794 mProtectedNetworks.add(p); 795 } else { 796 if (DBG) loge("Ignoring protectedNetwork " + p); 797 } 798 } 799 800 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 801 && SystemProperties.get("ro.build.type").equals("eng"); 802 803 mTethering = new Tethering(mContext, mNetd, statsService); 804 805 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 806 807 //set up the listener for user state for creating user VPNs 808 IntentFilter intentFilter = new IntentFilter(); 809 intentFilter.addAction(Intent.ACTION_USER_STARTED); 810 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 811 intentFilter.addAction(Intent.ACTION_USER_ADDED); 812 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 813 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 814 mContext.registerReceiverAsUser( 815 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 816 817 try { 818 mNetd.registerObserver(mTethering); 819 mNetd.registerObserver(mDataActivityObserver); 820 } catch (RemoteException e) { 821 loge("Error registering observer :" + e); 822 } 823 824 if (DBG) { 825 mInetLog = new ArrayList(); 826 } 827 828 mSettingsObserver = new SettingsObserver(mContext, mHandler); 829 registerSettingsCallbacks(); 830 831 mDataConnectionStats = new DataConnectionStats(mContext); 832 mDataConnectionStats.startMonitoring(); 833 834 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 835 836 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 837 838 mKeepaliveTracker = new KeepaliveTracker(mHandler); 839 mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager, 840 mContext.getSystemService(NotificationManager.class)); 841 mLingerMonitor = new LingerMonitor(mContext, mNotifier); 842 } 843 844 private NetworkRequest createInternetRequestForTransport(int transportType) { 845 NetworkCapabilities netCap = new NetworkCapabilities(); 846 netCap.addCapability(NET_CAPABILITY_INTERNET); 847 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 848 if (transportType > -1) { 849 netCap.addTransportType(transportType); 850 } 851 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), 852 NetworkRequest.Type.REQUEST); 853 } 854 855 // Used only for testing. 856 // TODO: Delete this and either: 857 // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires 858 // changing ContentResolver to make registerContentObserver non-final). 859 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 860 // by subclassing SettingsObserver. 861 @VisibleForTesting 862 void updateMobileDataAlwaysOn() { 863 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 864 } 865 866 private void handleMobileDataAlwaysOn() { 867 final boolean enable = (Settings.Global.getInt( 868 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 869 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 870 if (enable == isEnabled) { 871 return; // Nothing to do. 872 } 873 874 if (enable) { 875 handleRegisterNetworkRequest(new NetworkRequestInfo( 876 null, mDefaultMobileDataRequest, new Binder())); 877 } else { 878 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 879 } 880 } 881 882 private void registerSettingsCallbacks() { 883 // Watch for global HTTP proxy changes. 884 mSettingsObserver.observe( 885 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 886 EVENT_APPLY_GLOBAL_HTTP_PROXY); 887 888 // Watch for whether or not to keep mobile data always on. 889 mSettingsObserver.observe( 890 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 891 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 892 } 893 894 private synchronized int nextNetworkRequestId() { 895 return mNextNetworkRequestId++; 896 } 897 898 @VisibleForTesting 899 protected int reserveNetId() { 900 synchronized (mNetworkForNetId) { 901 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 902 int netId = mNextNetId; 903 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 904 // Make sure NetID unused. http://b/16815182 905 if (!mNetIdInUse.get(netId)) { 906 mNetIdInUse.put(netId, true); 907 return netId; 908 } 909 } 910 } 911 throw new IllegalStateException("No free netIds"); 912 } 913 914 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 915 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 916 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 917 final NetworkState state; 918 if (nai != null) { 919 state = nai.getNetworkState(); 920 state.networkInfo.setType(networkType); 921 } else { 922 final NetworkInfo info = new NetworkInfo(networkType, 0, 923 getNetworkTypeName(networkType), ""); 924 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 925 info.setIsAvailable(true); 926 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 927 null, null, null); 928 } 929 filterNetworkStateForUid(state, uid, ignoreBlocked); 930 return state; 931 } else { 932 return NetworkState.EMPTY; 933 } 934 } 935 936 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 937 if (network == null) { 938 return null; 939 } 940 synchronized (mNetworkForNetId) { 941 return mNetworkForNetId.get(network.netId); 942 } 943 } 944 945 private Network[] getVpnUnderlyingNetworks(int uid) { 946 if (!mLockdownEnabled) { 947 int user = UserHandle.getUserId(uid); 948 synchronized (mVpns) { 949 Vpn vpn = mVpns.get(user); 950 if (vpn != null && vpn.appliesToUid(uid)) { 951 return vpn.getUnderlyingNetworks(); 952 } 953 } 954 } 955 return null; 956 } 957 958 private NetworkState getUnfilteredActiveNetworkState(int uid) { 959 NetworkAgentInfo nai = getDefaultNetwork(); 960 961 final Network[] networks = getVpnUnderlyingNetworks(uid); 962 if (networks != null) { 963 // getUnderlyingNetworks() returns: 964 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 965 // empty array => the VPN explicitly said "no default network". 966 // non-empty array => the VPN specified one or more default networks; we use the 967 // first one. 968 if (networks.length > 0) { 969 nai = getNetworkAgentInfoForNetwork(networks[0]); 970 } else { 971 nai = null; 972 } 973 } 974 975 if (nai != null) { 976 return nai.getNetworkState(); 977 } else { 978 return NetworkState.EMPTY; 979 } 980 } 981 982 /** 983 * Check if UID should be blocked from using the network with the given LinkProperties. 984 */ 985 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 986 boolean ignoreBlocked) { 987 // Networks aren't blocked when ignoring blocked status 988 if (ignoreBlocked) return false; 989 // Networks are never blocked for system services 990 if (isSystem(uid)) return false; 991 992 final boolean networkMetered; 993 final int uidRules; 994 995 synchronized (mVpns) { 996 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 997 if (vpn != null && vpn.isBlockingUid(uid)) { 998 return true; 999 } 1000 } 1001 1002 final String iface = (lp == null ? "" : lp.getInterfaceName()); 1003 synchronized (mRulesLock) { 1004 networkMetered = mMeteredIfaces.contains(iface); 1005 uidRules = mUidRules.get(uid, RULE_NONE); 1006 } 1007 1008 boolean allowed = true; 1009 // Check Data Saver Mode first... 1010 if (networkMetered) { 1011 if ((uidRules & RULE_REJECT_METERED) != 0) { 1012 if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); 1013 // Explicitly blacklisted. 1014 allowed = false; 1015 } else { 1016 allowed = !mRestrictBackground 1017 || (uidRules & RULE_ALLOW_METERED) != 0 1018 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; 1019 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1020 + " mRestrictBackground=" + mRestrictBackground 1021 + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) 1022 + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" 1023 + ": " + allowed); 1024 } 1025 } 1026 // ...then power restrictions. 1027 if (allowed) { 1028 allowed = (uidRules & RULE_REJECT_ALL) == 0; 1029 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1030 + " rule is " + uidRulesToString(uidRules) + ": " + allowed); 1031 } 1032 return !allowed; 1033 } 1034 1035 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1036 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1037 return; 1038 } 1039 boolean removed = false; 1040 boolean added = false; 1041 synchronized (mBlockedAppUids) { 1042 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1043 added = true; 1044 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1045 removed = true; 1046 } 1047 } 1048 if (added) { 1049 log("Returning blocked NetworkInfo to uid=" + uid); 1050 mNetworkInfoBlockingLogs.log("BLOCKED " + uid); 1051 } else if (removed) { 1052 log("Returning unblocked NetworkInfo to uid=" + uid); 1053 mNetworkInfoBlockingLogs.log("UNBLOCKED " + uid); 1054 } 1055 } 1056 1057 /** 1058 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1059 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1060 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 1061 * {@link NetworkInfo#isMetered()} based on network policies. 1062 */ 1063 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1064 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1065 1066 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1067 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1068 } 1069 if (mLockdownTracker != null) { 1070 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1071 } 1072 1073 // TODO: apply metered state closer to NetworkAgentInfo 1074 final long token = Binder.clearCallingIdentity(); 1075 try { 1076 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 1077 } catch (RemoteException e) { 1078 } finally { 1079 Binder.restoreCallingIdentity(token); 1080 } 1081 } 1082 1083 /** 1084 * Return NetworkInfo for the active (i.e., connected) network interface. 1085 * It is assumed that at most one network is active at a time. If more 1086 * than one is active, it is indeterminate which will be returned. 1087 * @return the info for the active network, or {@code null} if none is 1088 * active 1089 */ 1090 @Override 1091 public NetworkInfo getActiveNetworkInfo() { 1092 enforceAccessPermission(); 1093 final int uid = Binder.getCallingUid(); 1094 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1095 filterNetworkStateForUid(state, uid, false); 1096 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1097 return state.networkInfo; 1098 } 1099 1100 @Override 1101 public Network getActiveNetwork() { 1102 enforceAccessPermission(); 1103 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1104 } 1105 1106 @Override 1107 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1108 enforceConnectivityInternalPermission(); 1109 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1110 } 1111 1112 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1113 final int user = UserHandle.getUserId(uid); 1114 int vpnNetId = NETID_UNSET; 1115 synchronized (mVpns) { 1116 final Vpn vpn = mVpns.get(user); 1117 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1118 } 1119 NetworkAgentInfo nai; 1120 if (vpnNetId != NETID_UNSET) { 1121 synchronized (mNetworkForNetId) { 1122 nai = mNetworkForNetId.get(vpnNetId); 1123 } 1124 if (nai != null) return nai.network; 1125 } 1126 nai = getDefaultNetwork(); 1127 if (nai != null 1128 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1129 nai = null; 1130 } 1131 return nai != null ? nai.network : null; 1132 } 1133 1134 // Public because it's used by mLockdownTracker. 1135 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1136 enforceAccessPermission(); 1137 final int uid = Binder.getCallingUid(); 1138 NetworkState state = getUnfilteredActiveNetworkState(uid); 1139 return state.networkInfo; 1140 } 1141 1142 @Override 1143 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1144 enforceConnectivityInternalPermission(); 1145 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1146 filterNetworkStateForUid(state, uid, ignoreBlocked); 1147 return state.networkInfo; 1148 } 1149 1150 @Override 1151 public NetworkInfo getNetworkInfo(int networkType) { 1152 enforceAccessPermission(); 1153 final int uid = Binder.getCallingUid(); 1154 if (getVpnUnderlyingNetworks(uid) != null) { 1155 // A VPN is active, so we may need to return one of its underlying networks. This 1156 // information is not available in LegacyTypeTracker, so we have to get it from 1157 // getUnfilteredActiveNetworkState. 1158 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1159 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1160 filterNetworkStateForUid(state, uid, false); 1161 return state.networkInfo; 1162 } 1163 } 1164 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1165 return state.networkInfo; 1166 } 1167 1168 @Override 1169 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1170 enforceAccessPermission(); 1171 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1172 if (nai != null) { 1173 final NetworkState state = nai.getNetworkState(); 1174 filterNetworkStateForUid(state, uid, ignoreBlocked); 1175 return state.networkInfo; 1176 } else { 1177 return null; 1178 } 1179 } 1180 1181 @Override 1182 public NetworkInfo[] getAllNetworkInfo() { 1183 enforceAccessPermission(); 1184 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1185 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1186 networkType++) { 1187 NetworkInfo info = getNetworkInfo(networkType); 1188 if (info != null) { 1189 result.add(info); 1190 } 1191 } 1192 return result.toArray(new NetworkInfo[result.size()]); 1193 } 1194 1195 @Override 1196 public Network getNetworkForType(int networkType) { 1197 enforceAccessPermission(); 1198 final int uid = Binder.getCallingUid(); 1199 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1200 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1201 return state.network; 1202 } 1203 return null; 1204 } 1205 1206 @Override 1207 public Network[] getAllNetworks() { 1208 enforceAccessPermission(); 1209 synchronized (mNetworkForNetId) { 1210 final Network[] result = new Network[mNetworkForNetId.size()]; 1211 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1212 result[i] = mNetworkForNetId.valueAt(i).network; 1213 } 1214 return result; 1215 } 1216 } 1217 1218 @Override 1219 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1220 // The basic principle is: if an app's traffic could possibly go over a 1221 // network, without the app doing anything multinetwork-specific, 1222 // (hence, by "default"), then include that network's capabilities in 1223 // the array. 1224 // 1225 // In the normal case, app traffic only goes over the system's default 1226 // network connection, so that's the only network returned. 1227 // 1228 // With a VPN in force, some app traffic may go into the VPN, and thus 1229 // over whatever underlying networks the VPN specifies, while other app 1230 // traffic may go over the system default network (e.g.: a split-tunnel 1231 // VPN, or an app disallowed by the VPN), so the set of networks 1232 // returned includes the VPN's underlying networks and the system 1233 // default. 1234 enforceAccessPermission(); 1235 1236 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1237 1238 NetworkAgentInfo nai = getDefaultNetwork(); 1239 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1240 if (nc != null) { 1241 result.put(nai.network, nc); 1242 } 1243 1244 if (!mLockdownEnabled) { 1245 synchronized (mVpns) { 1246 Vpn vpn = mVpns.get(userId); 1247 if (vpn != null) { 1248 Network[] networks = vpn.getUnderlyingNetworks(); 1249 if (networks != null) { 1250 for (Network network : networks) { 1251 nai = getNetworkAgentInfoForNetwork(network); 1252 nc = getNetworkCapabilitiesInternal(nai); 1253 if (nc != null) { 1254 result.put(network, nc); 1255 } 1256 } 1257 } 1258 } 1259 } 1260 } 1261 1262 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1263 out = result.values().toArray(out); 1264 return out; 1265 } 1266 1267 @Override 1268 public boolean isNetworkSupported(int networkType) { 1269 enforceAccessPermission(); 1270 return mLegacyTypeTracker.isTypeSupported(networkType); 1271 } 1272 1273 /** 1274 * Return LinkProperties for the active (i.e., connected) default 1275 * network interface. It is assumed that at most one default network 1276 * is active at a time. If more than one is active, it is indeterminate 1277 * which will be returned. 1278 * @return the ip properties for the active network, or {@code null} if 1279 * none is active 1280 */ 1281 @Override 1282 public LinkProperties getActiveLinkProperties() { 1283 enforceAccessPermission(); 1284 final int uid = Binder.getCallingUid(); 1285 NetworkState state = getUnfilteredActiveNetworkState(uid); 1286 return state.linkProperties; 1287 } 1288 1289 @Override 1290 public LinkProperties getLinkPropertiesForType(int networkType) { 1291 enforceAccessPermission(); 1292 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1293 if (nai != null) { 1294 synchronized (nai) { 1295 return new LinkProperties(nai.linkProperties); 1296 } 1297 } 1298 return null; 1299 } 1300 1301 // TODO - this should be ALL networks 1302 @Override 1303 public LinkProperties getLinkProperties(Network network) { 1304 enforceAccessPermission(); 1305 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1306 if (nai != null) { 1307 synchronized (nai) { 1308 return new LinkProperties(nai.linkProperties); 1309 } 1310 } 1311 return null; 1312 } 1313 1314 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1315 if (nai != null) { 1316 synchronized (nai) { 1317 if (nai.networkCapabilities != null) { 1318 return new NetworkCapabilities(nai.networkCapabilities); 1319 } 1320 } 1321 } 1322 return null; 1323 } 1324 1325 @Override 1326 public NetworkCapabilities getNetworkCapabilities(Network network) { 1327 enforceAccessPermission(); 1328 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1329 } 1330 1331 @Override 1332 public NetworkState[] getAllNetworkState() { 1333 // Require internal since we're handing out IMSI details 1334 enforceConnectivityInternalPermission(); 1335 1336 final ArrayList<NetworkState> result = Lists.newArrayList(); 1337 for (Network network : getAllNetworks()) { 1338 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1339 if (nai != null) { 1340 result.add(nai.getNetworkState()); 1341 } 1342 } 1343 return result.toArray(new NetworkState[result.size()]); 1344 } 1345 1346 @Override 1347 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1348 enforceAccessPermission(); 1349 final int uid = Binder.getCallingUid(); 1350 final long token = Binder.clearCallingIdentity(); 1351 try { 1352 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1353 if (state.networkInfo != null) { 1354 try { 1355 return mPolicyManager.getNetworkQuotaInfo(state); 1356 } catch (RemoteException e) { 1357 } 1358 } 1359 return null; 1360 } finally { 1361 Binder.restoreCallingIdentity(token); 1362 } 1363 } 1364 1365 @Override 1366 public boolean isActiveNetworkMetered() { 1367 enforceAccessPermission(); 1368 1369 final NetworkInfo info = getActiveNetworkInfo(); 1370 return (info != null) ? info.isMetered() : false; 1371 } 1372 1373 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1374 @Override 1375 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1376 int deviceType = Integer.parseInt(label); 1377 sendDataActivityBroadcast(deviceType, active, tsNanos); 1378 } 1379 }; 1380 1381 /** 1382 * Ensure that a network route exists to deliver traffic to the specified 1383 * host via the specified network interface. 1384 * @param networkType the type of the network over which traffic to the 1385 * specified host is to be routed 1386 * @param hostAddress the IP address of the host to which the route is 1387 * desired 1388 * @return {@code true} on success, {@code false} on failure 1389 */ 1390 @Override 1391 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1392 enforceChangePermission(); 1393 if (mProtectedNetworks.contains(networkType)) { 1394 enforceConnectivityInternalPermission(); 1395 } 1396 1397 InetAddress addr; 1398 try { 1399 addr = InetAddress.getByAddress(hostAddress); 1400 } catch (UnknownHostException e) { 1401 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1402 return false; 1403 } 1404 1405 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1406 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1407 return false; 1408 } 1409 1410 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1411 if (nai == null) { 1412 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1413 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1414 } else { 1415 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1416 } 1417 return false; 1418 } 1419 1420 DetailedState netState; 1421 synchronized (nai) { 1422 netState = nai.networkInfo.getDetailedState(); 1423 } 1424 1425 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1426 if (VDBG) { 1427 log("requestRouteToHostAddress on down network " 1428 + "(" + networkType + ") - dropped" 1429 + " netState=" + netState); 1430 } 1431 return false; 1432 } 1433 1434 final int uid = Binder.getCallingUid(); 1435 final long token = Binder.clearCallingIdentity(); 1436 try { 1437 LinkProperties lp; 1438 int netId; 1439 synchronized (nai) { 1440 lp = nai.linkProperties; 1441 netId = nai.network.netId; 1442 } 1443 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1444 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1445 return ok; 1446 } finally { 1447 Binder.restoreCallingIdentity(token); 1448 } 1449 } 1450 1451 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1452 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1453 if (bestRoute == null) { 1454 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1455 } else { 1456 String iface = bestRoute.getInterface(); 1457 if (bestRoute.getGateway().equals(addr)) { 1458 // if there is no better route, add the implied hostroute for our gateway 1459 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1460 } else { 1461 // if we will connect to this through another route, add a direct route 1462 // to it's gateway 1463 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1464 } 1465 } 1466 if (DBG) log("Adding legacy route " + bestRoute + 1467 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1468 try { 1469 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1470 } catch (Exception e) { 1471 // never crash - catch them all 1472 if (DBG) loge("Exception trying to add a route: " + e); 1473 return false; 1474 } 1475 return true; 1476 } 1477 1478 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1479 @Override 1480 public void onUidRulesChanged(int uid, int uidRules) { 1481 // caller is NPMS, since we only register with them 1482 if (LOGD_RULES) { 1483 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1484 } 1485 1486 synchronized (mRulesLock) { 1487 // skip update when we've already applied rules 1488 final int oldRules = mUidRules.get(uid, RULE_NONE); 1489 if (oldRules == uidRules) return; 1490 1491 if (uidRules == RULE_NONE) { 1492 mUidRules.delete(uid); 1493 } else { 1494 mUidRules.put(uid, uidRules); 1495 } 1496 } 1497 1498 // TODO: notify UID when it has requested targeted updates 1499 } 1500 1501 @Override 1502 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1503 // caller is NPMS, since we only register with them 1504 if (LOGD_RULES) { 1505 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1506 } 1507 1508 synchronized (mRulesLock) { 1509 mMeteredIfaces.clear(); 1510 for (String iface : meteredIfaces) { 1511 mMeteredIfaces.add(iface); 1512 } 1513 } 1514 } 1515 1516 @Override 1517 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1518 // caller is NPMS, since we only register with them 1519 if (LOGD_RULES) { 1520 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1521 } 1522 1523 synchronized (mRulesLock) { 1524 mRestrictBackground = restrictBackground; 1525 } 1526 1527 if (restrictBackground) { 1528 log("onRestrictBackgroundChanged(true): disabling tethering"); 1529 mTethering.untetherAll(); 1530 } 1531 } 1532 1533 @Override 1534 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1535 if (LOGD_RULES) { 1536 // caller is NPMS, since we only register with them 1537 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1538 + whitelisted + ")"); 1539 } 1540 } 1541 @Override 1542 public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { 1543 if (LOGD_RULES) { 1544 // caller is NPMS, since we only register with them 1545 log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" 1546 + blacklisted + ")"); 1547 } 1548 } 1549 }; 1550 1551 /** 1552 * Require that the caller is either in the same user or has appropriate permission to interact 1553 * across users. 1554 * 1555 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1556 */ 1557 private void enforceCrossUserPermission(int userId) { 1558 if (userId == UserHandle.getCallingUserId()) { 1559 // Not a cross-user call. 1560 return; 1561 } 1562 mContext.enforceCallingOrSelfPermission( 1563 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1564 "ConnectivityService"); 1565 } 1566 1567 private void enforceInternetPermission() { 1568 mContext.enforceCallingOrSelfPermission( 1569 android.Manifest.permission.INTERNET, 1570 "ConnectivityService"); 1571 } 1572 1573 private void enforceAccessPermission() { 1574 mContext.enforceCallingOrSelfPermission( 1575 android.Manifest.permission.ACCESS_NETWORK_STATE, 1576 "ConnectivityService"); 1577 } 1578 1579 private void enforceChangePermission() { 1580 ConnectivityManager.enforceChangePermission(mContext); 1581 } 1582 1583 private void enforceTetherAccessPermission() { 1584 mContext.enforceCallingOrSelfPermission( 1585 android.Manifest.permission.ACCESS_NETWORK_STATE, 1586 "ConnectivityService"); 1587 } 1588 1589 private void enforceConnectivityInternalPermission() { 1590 mContext.enforceCallingOrSelfPermission( 1591 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1592 "ConnectivityService"); 1593 } 1594 1595 private void enforceConnectivityRestrictedNetworksPermission() { 1596 try { 1597 mContext.enforceCallingOrSelfPermission( 1598 android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, 1599 "ConnectivityService"); 1600 return; 1601 } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } 1602 enforceConnectivityInternalPermission(); 1603 } 1604 1605 private void enforceKeepalivePermission() { 1606 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1607 } 1608 1609 // Public because it's used by mLockdownTracker. 1610 public void sendConnectedBroadcast(NetworkInfo info) { 1611 enforceConnectivityInternalPermission(); 1612 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1613 } 1614 1615 private void sendInetConditionBroadcast(NetworkInfo info) { 1616 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1617 } 1618 1619 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1620 if (mLockdownTracker != null) { 1621 info = new NetworkInfo(info); 1622 mLockdownTracker.augmentNetworkInfo(info); 1623 } 1624 1625 Intent intent = new Intent(bcastType); 1626 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1627 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1628 if (info.isFailover()) { 1629 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1630 info.setFailover(false); 1631 } 1632 if (info.getReason() != null) { 1633 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1634 } 1635 if (info.getExtraInfo() != null) { 1636 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1637 info.getExtraInfo()); 1638 } 1639 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1640 return intent; 1641 } 1642 1643 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1644 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1645 } 1646 1647 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1648 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1649 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1650 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1651 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1652 final long ident = Binder.clearCallingIdentity(); 1653 try { 1654 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1655 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1656 } finally { 1657 Binder.restoreCallingIdentity(ident); 1658 } 1659 } 1660 1661 private void sendStickyBroadcast(Intent intent) { 1662 synchronized(this) { 1663 if (!mSystemReady) { 1664 mInitialBroadcast = new Intent(intent); 1665 } 1666 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1667 if (VDBG) { 1668 log("sendStickyBroadcast: action=" + intent.getAction()); 1669 } 1670 1671 Bundle options = null; 1672 final long ident = Binder.clearCallingIdentity(); 1673 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1674 final NetworkInfo ni = intent.getParcelableExtra( 1675 ConnectivityManager.EXTRA_NETWORK_INFO); 1676 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1677 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1678 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1679 } else { 1680 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1681 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1682 options = opts.toBundle(); 1683 } 1684 final IBatteryStats bs = BatteryStatsService.getService(); 1685 try { 1686 bs.noteConnectivityChanged(intent.getIntExtra( 1687 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1688 ni != null ? ni.getState().toString() : "?"); 1689 } catch (RemoteException e) { 1690 } 1691 } 1692 try { 1693 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1694 } finally { 1695 Binder.restoreCallingIdentity(ident); 1696 } 1697 } 1698 } 1699 1700 void systemReady() { 1701 loadGlobalProxy(); 1702 1703 synchronized(this) { 1704 mSystemReady = true; 1705 if (mInitialBroadcast != null) { 1706 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1707 mInitialBroadcast = null; 1708 } 1709 } 1710 // load the global proxy at startup 1711 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1712 1713 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1714 // for user to unlock device too. 1715 updateLockdownVpn(); 1716 1717 // Configure whether mobile data is always on. 1718 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1719 1720 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1721 1722 mPermissionMonitor.startMonitoring(); 1723 } 1724 1725 /** 1726 * Setup data activity tracking for the given network. 1727 * 1728 * Every {@code setupDataActivityTracking} should be paired with a 1729 * {@link #removeDataActivityTracking} for cleanup. 1730 */ 1731 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1732 final String iface = networkAgent.linkProperties.getInterfaceName(); 1733 1734 final int timeout; 1735 int type = ConnectivityManager.TYPE_NONE; 1736 1737 if (networkAgent.networkCapabilities.hasTransport( 1738 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1739 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1740 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1741 10); 1742 type = ConnectivityManager.TYPE_MOBILE; 1743 } else if (networkAgent.networkCapabilities.hasTransport( 1744 NetworkCapabilities.TRANSPORT_WIFI)) { 1745 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1746 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1747 15); 1748 type = ConnectivityManager.TYPE_WIFI; 1749 } else { 1750 // do not track any other networks 1751 timeout = 0; 1752 } 1753 1754 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1755 try { 1756 mNetd.addIdleTimer(iface, timeout, type); 1757 } catch (Exception e) { 1758 // You shall not crash! 1759 loge("Exception in setupDataActivityTracking " + e); 1760 } 1761 } 1762 } 1763 1764 /** 1765 * Remove data activity tracking when network disconnects. 1766 */ 1767 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1768 final String iface = networkAgent.linkProperties.getInterfaceName(); 1769 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1770 1771 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1772 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1773 try { 1774 // the call fails silently if no idletimer setup for this interface 1775 mNetd.removeIdleTimer(iface); 1776 } catch (Exception e) { 1777 loge("Exception in removeDataActivityTracking " + e); 1778 } 1779 } 1780 } 1781 1782 /** 1783 * Reads the network specific MTU size from reources. 1784 * and set it on it's iface. 1785 */ 1786 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1787 final String iface = newLp.getInterfaceName(); 1788 final int mtu = newLp.getMtu(); 1789 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1790 if (VDBG) log("identical MTU - not setting"); 1791 return; 1792 } 1793 1794 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1795 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1796 return; 1797 } 1798 1799 // Cannot set MTU without interface name 1800 if (TextUtils.isEmpty(iface)) { 1801 loge("Setting MTU size with null iface."); 1802 return; 1803 } 1804 1805 try { 1806 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1807 mNetd.setMtu(iface, mtu); 1808 } catch (Exception e) { 1809 Slog.e(TAG, "exception in setMtu()" + e); 1810 } 1811 } 1812 1813 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1814 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1815 1816 // Overridden for testing purposes to avoid writing to SystemProperties. 1817 @VisibleForTesting 1818 protected int getDefaultTcpRwnd() { 1819 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1820 } 1821 1822 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1823 if (isDefaultNetwork(nai) == false) { 1824 return; 1825 } 1826 1827 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1828 String[] values = null; 1829 if (tcpBufferSizes != null) { 1830 values = tcpBufferSizes.split(","); 1831 } 1832 1833 if (values == null || values.length != 6) { 1834 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1835 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1836 values = tcpBufferSizes.split(","); 1837 } 1838 1839 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1840 1841 try { 1842 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1843 1844 final String prefix = "/sys/kernel/ipv4/tcp_"; 1845 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1846 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1847 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1848 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1849 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1850 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1851 mCurrentTcpBufferSizes = tcpBufferSizes; 1852 } catch (IOException e) { 1853 loge("Can't set TCP buffer sizes:" + e); 1854 } 1855 1856 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1857 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1858 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1859 if (rwndValue != 0) { 1860 SystemProperties.set(sysctlKey, rwndValue.toString()); 1861 } 1862 } 1863 1864 private void flushVmDnsCache() { 1865 /* 1866 * Tell the VMs to toss their DNS caches 1867 */ 1868 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1869 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1870 /* 1871 * Connectivity events can happen before boot has completed ... 1872 */ 1873 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1874 final long ident = Binder.clearCallingIdentity(); 1875 try { 1876 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1877 } finally { 1878 Binder.restoreCallingIdentity(ident); 1879 } 1880 } 1881 1882 @Override 1883 public int getRestoreDefaultNetworkDelay(int networkType) { 1884 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1885 NETWORK_RESTORE_DELAY_PROP_NAME); 1886 if(restoreDefaultNetworkDelayStr != null && 1887 restoreDefaultNetworkDelayStr.length() != 0) { 1888 try { 1889 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1890 } catch (NumberFormatException e) { 1891 } 1892 } 1893 // if the system property isn't set, use the value for the apn type 1894 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1895 1896 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1897 (mNetConfigs[networkType] != null)) { 1898 ret = mNetConfigs[networkType].restoreTime; 1899 } 1900 return ret; 1901 } 1902 1903 private boolean argsContain(String[] args, String target) { 1904 for (String arg : args) { 1905 if (arg.equals(target)) return true; 1906 } 1907 return false; 1908 } 1909 1910 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1911 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1912 final long DIAG_TIME_MS = 5000; 1913 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1914 // Start gathering diagnostic information. 1915 netDiags.add(new NetworkDiagnostics( 1916 nai.network, 1917 new LinkProperties(nai.linkProperties), // Must be a copy. 1918 DIAG_TIME_MS)); 1919 } 1920 1921 for (NetworkDiagnostics netDiag : netDiags) { 1922 pw.println(); 1923 netDiag.waitForMeasurements(); 1924 netDiag.dump(pw); 1925 } 1926 } 1927 1928 @Override 1929 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1930 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1931 if (mContext.checkCallingOrSelfPermission( 1932 android.Manifest.permission.DUMP) 1933 != PackageManager.PERMISSION_GRANTED) { 1934 pw.println("Permission Denial: can't dump ConnectivityService " + 1935 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1936 Binder.getCallingUid()); 1937 return; 1938 } 1939 1940 if (argsContain(args, "--diag")) { 1941 dumpNetworkDiagnostics(pw); 1942 return; 1943 } 1944 1945 pw.print("NetworkFactories for:"); 1946 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1947 pw.print(" " + nfi.name); 1948 } 1949 pw.println(); 1950 pw.println(); 1951 1952 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1953 pw.print("Active default network: "); 1954 if (defaultNai == null) { 1955 pw.println("none"); 1956 } else { 1957 pw.println(defaultNai.network.netId); 1958 } 1959 pw.println(); 1960 1961 pw.println("Current Networks:"); 1962 pw.increaseIndent(); 1963 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1964 pw.println(nai.toString()); 1965 pw.increaseIndent(); 1966 pw.println(String.format("Requests: %d request/%d total", 1967 nai.numRequestNetworkRequests(), nai.numNetworkRequests())); 1968 pw.increaseIndent(); 1969 for (int i = 0; i < nai.numNetworkRequests(); i++) { 1970 pw.println(nai.requestAt(i).toString()); 1971 } 1972 pw.decreaseIndent(); 1973 pw.println("Lingered:"); 1974 pw.increaseIndent(); 1975 nai.dumpLingerTimers(pw); 1976 pw.decreaseIndent(); 1977 pw.decreaseIndent(); 1978 } 1979 pw.decreaseIndent(); 1980 pw.println(); 1981 1982 pw.println("Metered Interfaces:"); 1983 pw.increaseIndent(); 1984 for (String value : mMeteredIfaces) { 1985 pw.println(value); 1986 } 1987 pw.decreaseIndent(); 1988 pw.println(); 1989 1990 pw.print("Restrict background: "); 1991 pw.println(mRestrictBackground); 1992 pw.println(); 1993 1994 pw.println("Status for known UIDs:"); 1995 pw.increaseIndent(); 1996 final int size = mUidRules.size(); 1997 for (int i = 0; i < size; i++) { 1998 final int uid = mUidRules.keyAt(i); 1999 pw.print("UID="); 2000 pw.print(uid); 2001 final int uidRules = mUidRules.get(uid, RULE_NONE); 2002 pw.print(" rules="); 2003 pw.print(uidRulesToString(uidRules)); 2004 pw.println(); 2005 } 2006 pw.println(); 2007 pw.decreaseIndent(); 2008 2009 pw.println("Network Requests:"); 2010 pw.increaseIndent(); 2011 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2012 pw.println(nri.toString()); 2013 } 2014 pw.println(); 2015 pw.decreaseIndent(); 2016 2017 mLegacyTypeTracker.dump(pw); 2018 2019 synchronized (this) { 2020 pw.print("mNetTransitionWakeLock: currently " + 2021 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 2022 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 2023 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 2024 } else { 2025 pw.println(", last requested never"); 2026 } 2027 } 2028 2029 pw.println(); 2030 mTethering.dump(fd, pw, args); 2031 2032 pw.println(); 2033 mKeepaliveTracker.dump(pw); 2034 2035 pw.println(); 2036 2037 if (mInetLog != null && mInetLog.size() > 0) { 2038 pw.println(); 2039 pw.println("Inet condition reports:"); 2040 pw.increaseIndent(); 2041 for(int i = 0; i < mInetLog.size(); i++) { 2042 pw.println(mInetLog.get(i)); 2043 } 2044 pw.decreaseIndent(); 2045 } 2046 2047 if (argsContain(args, "--short") == false) { 2048 pw.println(); 2049 synchronized (mValidationLogs) { 2050 pw.println("mValidationLogs (most recent first):"); 2051 for (ValidationLog p : mValidationLogs) { 2052 pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); 2053 pw.increaseIndent(); 2054 p.mLog.dump(fd, pw, args); 2055 pw.decreaseIndent(); 2056 } 2057 } 2058 2059 pw.println(); 2060 pw.println("mNetworkRequestInfoLogs (most recent first):"); 2061 pw.increaseIndent(); 2062 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 2063 pw.decreaseIndent(); 2064 2065 pw.println(); 2066 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 2067 pw.increaseIndent(); 2068 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 2069 pw.decreaseIndent(); 2070 } 2071 } 2072 2073 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 2074 if (nai.network == null) return false; 2075 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 2076 if (officialNai != null && officialNai.equals(nai)) return true; 2077 if (officialNai != null || VDBG) { 2078 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 2079 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 2080 " - " + nai); 2081 } 2082 return false; 2083 } 2084 2085 // must be stateless - things change under us. 2086 private class NetworkStateTrackerHandler extends Handler { 2087 public NetworkStateTrackerHandler(Looper looper) { 2088 super(looper); 2089 } 2090 2091 private boolean maybeHandleAsyncChannelMessage(Message msg) { 2092 switch (msg.what) { 2093 default: 2094 return false; 2095 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2096 handleAsyncChannelHalfConnect(msg); 2097 break; 2098 } 2099 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2100 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2101 if (nai != null) nai.asyncChannel.disconnect(); 2102 break; 2103 } 2104 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2105 handleAsyncChannelDisconnected(msg); 2106 break; 2107 } 2108 } 2109 return true; 2110 } 2111 2112 private void maybeHandleNetworkAgentMessage(Message msg) { 2113 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2114 if (nai == null) { 2115 if (VDBG) { 2116 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 2117 log(String.format("%s from unknown NetworkAgent", what)); 2118 } 2119 return; 2120 } 2121 2122 switch (msg.what) { 2123 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2124 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2125 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2126 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 2127 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2128 } 2129 if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( 2130 networkCapabilities)) { 2131 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 2132 + nai.networkCapabilities + " -> " + networkCapabilities); 2133 } 2134 updateCapabilities(nai, networkCapabilities); 2135 break; 2136 } 2137 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2138 if (VDBG) { 2139 log("Update of LinkProperties for " + nai.name() + 2140 "; created=" + nai.created + 2141 "; everConnected=" + nai.everConnected); 2142 } 2143 LinkProperties oldLp = nai.linkProperties; 2144 synchronized (nai) { 2145 nai.linkProperties = (LinkProperties)msg.obj; 2146 } 2147 if (nai.everConnected) updateLinkProperties(nai, oldLp); 2148 break; 2149 } 2150 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2151 NetworkInfo info = (NetworkInfo) msg.obj; 2152 updateNetworkInfo(nai, info); 2153 break; 2154 } 2155 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2156 Integer score = (Integer) msg.obj; 2157 if (score != null) updateNetworkScore(nai, score.intValue()); 2158 break; 2159 } 2160 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2161 try { 2162 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2163 } catch (Exception e) { 2164 // Never crash! 2165 loge("Exception in addVpnUidRanges: " + e); 2166 } 2167 break; 2168 } 2169 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2170 try { 2171 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2172 } catch (Exception e) { 2173 // Never crash! 2174 loge("Exception in removeVpnUidRanges: " + e); 2175 } 2176 break; 2177 } 2178 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2179 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2180 loge("ERROR: already-connected network explicitly selected."); 2181 } 2182 nai.networkMisc.explicitlySelected = true; 2183 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2184 break; 2185 } 2186 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2187 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2188 break; 2189 } 2190 } 2191 } 2192 2193 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2194 switch (msg.what) { 2195 default: 2196 return false; 2197 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2198 final NetworkAgentInfo nai; 2199 synchronized (mNetworkForNetId) { 2200 nai = mNetworkForNetId.get(msg.arg2); 2201 } 2202 if (nai != null) { 2203 final boolean valid = 2204 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2205 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2206 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2207 if (valid != nai.lastValidated) { 2208 final int oldScore = nai.getCurrentScore(); 2209 nai.lastValidated = valid; 2210 nai.everValidated |= valid; 2211 updateCapabilities(nai, nai.networkCapabilities); 2212 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2213 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2214 } 2215 updateInetCondition(nai); 2216 // Let the NetworkAgent know the state of its network 2217 Bundle redirectUrlBundle = new Bundle(); 2218 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2219 nai.asyncChannel.sendMessage( 2220 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2221 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2222 0, redirectUrlBundle); 2223 } 2224 break; 2225 } 2226 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2227 final int netId = msg.arg2; 2228 final boolean visible = (msg.arg1 != 0); 2229 final NetworkAgentInfo nai; 2230 synchronized (mNetworkForNetId) { 2231 nai = mNetworkForNetId.get(netId); 2232 } 2233 // If captive portal status has changed, update capabilities. 2234 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2235 nai.lastCaptivePortalDetected = visible; 2236 nai.everCaptivePortalDetected |= visible; 2237 updateCapabilities(nai, nai.networkCapabilities); 2238 } 2239 if (!visible) { 2240 mNotifier.clearNotification(netId); 2241 } else { 2242 if (nai == null) { 2243 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2244 break; 2245 } 2246 if (!nai.networkMisc.provisioningNotificationDisabled) { 2247 mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null, 2248 (PendingIntent) msg.obj, nai.networkMisc.explicitlySelected); 2249 } 2250 } 2251 break; 2252 } 2253 } 2254 return true; 2255 } 2256 2257 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2258 switch (msg.what) { 2259 default: 2260 return false; 2261 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2262 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2263 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2264 handleLingerComplete(nai); 2265 } 2266 break; 2267 } 2268 } 2269 return true; 2270 } 2271 2272 @Override 2273 public void handleMessage(Message msg) { 2274 if (!maybeHandleAsyncChannelMessage(msg) && 2275 !maybeHandleNetworkMonitorMessage(msg) && 2276 !maybeHandleNetworkAgentInfoMessage(msg)) { 2277 maybeHandleNetworkAgentMessage(msg); 2278 } 2279 } 2280 } 2281 2282 private void updateLingerState(NetworkAgentInfo nai, long now) { 2283 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2284 // 2. If the network was lingering and there are now requests, unlinger it. 2285 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2286 // one lingered request, start lingering. 2287 nai.updateLingerTimer(); 2288 if (nai.isLingering() && nai.numRequestNetworkRequests() > 0) { 2289 if (DBG) log("Unlingering " + nai.name()); 2290 nai.unlinger(); 2291 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2292 } else if (unneeded(nai) && nai.getLingerExpiry() > 0) { // unneeded() calls isLingering() 2293 int lingerTime = (int) (nai.getLingerExpiry() - now); 2294 if (DBG) { 2295 Log.d(TAG, "Lingering " + nai.name() + " for " + lingerTime + "ms"); 2296 } 2297 nai.linger(); 2298 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2299 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2300 } 2301 } 2302 2303 private void handleAsyncChannelHalfConnect(Message msg) { 2304 AsyncChannel ac = (AsyncChannel) msg.obj; 2305 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2306 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2307 if (VDBG) log("NetworkFactory connected"); 2308 // A network factory has connected. Send it all current NetworkRequests. 2309 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2310 if (nri.request.isListen()) continue; 2311 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2312 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2313 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2314 } 2315 } else { 2316 loge("Error connecting NetworkFactory"); 2317 mNetworkFactoryInfos.remove(msg.obj); 2318 } 2319 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2320 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2321 if (VDBG) log("NetworkAgent connected"); 2322 // A network agent has requested a connection. Establish the connection. 2323 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2324 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2325 } else { 2326 loge("Error connecting NetworkAgent"); 2327 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2328 if (nai != null) { 2329 final boolean wasDefault = isDefaultNetwork(nai); 2330 synchronized (mNetworkForNetId) { 2331 mNetworkForNetId.remove(nai.network.netId); 2332 mNetIdInUse.delete(nai.network.netId); 2333 } 2334 // Just in case. 2335 mLegacyTypeTracker.remove(nai, wasDefault); 2336 } 2337 } 2338 } 2339 } 2340 2341 private void handleAsyncChannelDisconnected(Message msg) { 2342 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2343 if (nai != null) { 2344 if (DBG) { 2345 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2346 } 2347 // A network agent has disconnected. 2348 // TODO - if we move the logic to the network agent (have them disconnect 2349 // because they lost all their requests or because their score isn't good) 2350 // then they would disconnect organically, report their new state and then 2351 // disconnect the channel. 2352 if (nai.networkInfo.isConnected()) { 2353 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2354 null, null); 2355 } 2356 final boolean wasDefault = isDefaultNetwork(nai); 2357 if (wasDefault) { 2358 mDefaultInetConditionPublished = 0; 2359 // Log default network disconnection before required book-keeping. 2360 // Let rematchAllNetworksAndRequests() below record a new default network event 2361 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2362 // whose timestamps tell how long it takes to recover a default network. 2363 logDefaultNetworkEvent(null, nai); 2364 } 2365 notifyIfacesChangedForNetworkStats(); 2366 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2367 // by other networks that are already connected. Perhaps that can be done by 2368 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2369 // of rematchAllNetworksAndRequests 2370 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2371 mKeepaliveTracker.handleStopAllKeepalives(nai, 2372 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2373 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2374 mNetworkAgentInfos.remove(msg.replyTo); 2375 updateClat(null, nai.linkProperties, nai); 2376 synchronized (mNetworkForNetId) { 2377 // Remove the NetworkAgent, but don't mark the netId as 2378 // available until we've told netd to delete it below. 2379 mNetworkForNetId.remove(nai.network.netId); 2380 } 2381 // Remove all previously satisfied requests. 2382 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2383 NetworkRequest request = nai.requestAt(i); 2384 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2385 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2386 mNetworkForRequestId.remove(request.requestId); 2387 sendUpdatedScoreToFactories(request, 0); 2388 } 2389 } 2390 nai.clearLingerState(); 2391 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2392 removeDataActivityTracking(nai); 2393 notifyLockdownVpn(nai); 2394 requestNetworkTransitionWakelock(nai.name()); 2395 } 2396 mLegacyTypeTracker.remove(nai, wasDefault); 2397 rematchAllNetworksAndRequests(null, 0); 2398 mLingerMonitor.noteDisconnect(nai); 2399 if (nai.created) { 2400 // Tell netd to clean up the configuration for this network 2401 // (routing rules, DNS, etc). 2402 // This may be slow as it requires a lot of netd shelling out to ip and 2403 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2404 // after we've rematched networks with requests which should make a potential 2405 // fallback network the default or requested a new network from the 2406 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2407 // long time. 2408 try { 2409 mNetd.removeNetwork(nai.network.netId); 2410 } catch (Exception e) { 2411 loge("Exception removing network: " + e); 2412 } 2413 } 2414 synchronized (mNetworkForNetId) { 2415 mNetIdInUse.delete(nai.network.netId); 2416 } 2417 } else { 2418 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2419 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2420 } 2421 } 2422 2423 // If this method proves to be too slow then we can maintain a separate 2424 // pendingIntent => NetworkRequestInfo map. 2425 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2426 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2427 Intent intent = pendingIntent.getIntent(); 2428 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2429 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2430 if (existingPendingIntent != null && 2431 existingPendingIntent.getIntent().filterEquals(intent)) { 2432 return entry.getValue(); 2433 } 2434 } 2435 return null; 2436 } 2437 2438 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2439 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2440 2441 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2442 if (existingRequest != null) { // remove the existing request. 2443 if (DBG) log("Replacing " + existingRequest.request + " with " 2444 + nri.request + " because their intents matched."); 2445 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2446 } 2447 handleRegisterNetworkRequest(nri); 2448 } 2449 2450 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2451 mNetworkRequests.put(nri.request, nri); 2452 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2453 if (nri.request.isListen()) { 2454 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2455 if (nri.request.networkCapabilities.hasSignalStrength() && 2456 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2457 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2458 } 2459 } 2460 } 2461 rematchAllNetworksAndRequests(null, 0); 2462 if (nri.request.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2463 sendUpdatedScoreToFactories(nri.request, 0); 2464 } 2465 } 2466 2467 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2468 int callingUid) { 2469 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2470 if (nri != null) { 2471 handleReleaseNetworkRequest(nri.request, callingUid); 2472 } 2473 } 2474 2475 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2476 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2477 // would it have a chance of satisfying any NetworkRequests. 2478 private boolean unneeded(NetworkAgentInfo nai) { 2479 if (!nai.everConnected || nai.isVPN() || 2480 nai.isLingering() || nai.numRequestNetworkRequests() > 0) { 2481 return false; 2482 } 2483 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2484 // If this Network is already the highest scoring Network for a request, or if 2485 // there is hope for it to become one if it validated, then it is needed. 2486 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2487 (nai.isSatisfyingRequest(nri.request.requestId) || 2488 // Note that this catches two important cases: 2489 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2490 // is currently satisfying the request. This is desirable when 2491 // cellular ends up validating but WiFi does not. 2492 // 2. Unvalidated WiFi will not be reaped when validated cellular 2493 // is currently satisfying the request. This is desirable when 2494 // WiFi ends up validating and out scoring cellular. 2495 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2496 nai.getCurrentScoreAsValidated())) { 2497 return false; 2498 } 2499 } 2500 return true; 2501 } 2502 2503 private NetworkRequestInfo getNriForAppRequest( 2504 NetworkRequest request, int callingUid, String requestedOperation) { 2505 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2506 2507 if (nri != null) { 2508 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2509 log(String.format("UID %d attempted to %s for unowned request %s", 2510 callingUid, requestedOperation, nri)); 2511 return null; 2512 } 2513 } 2514 2515 return nri; 2516 } 2517 2518 private void handleRequestCallbackUpdate(NetworkRequest request, int callingUid, 2519 String description, int callbackType) { 2520 final NetworkRequestInfo nri = getNriForAppRequest(request, callingUid, description); 2521 if (nri == null) return; 2522 2523 final NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2524 // The network that is satisfying this request may have changed since 2525 // the application requested the update. 2526 // 2527 // - If the request is no longer satisfied, don't send any updates. 2528 // - If the request is satisfied by a different network, it is the 2529 // caller's responsibility to check that the Network object in the 2530 // callback matches the network that was returned in the last 2531 // onAvailable() callback for this request. 2532 if (nai == null) return; 2533 callCallbackForRequest(nri, nai, callbackType, 0); 2534 } 2535 2536 private void handleRequestLinkProperties(NetworkRequest request, int callingUid) { 2537 handleRequestCallbackUpdate(request, callingUid, 2538 "request LinkProperties", ConnectivityManager.CALLBACK_IP_CHANGED); 2539 } 2540 2541 private void handleRequestNetworkCapabilities(NetworkRequest request, int callingUid) { 2542 handleRequestCallbackUpdate(request, callingUid, 2543 "request NetworkCapabilities", ConnectivityManager.CALLBACK_CAP_CHANGED); 2544 } 2545 2546 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2547 final NetworkRequestInfo nri = getNriForAppRequest( 2548 request, callingUid, "release NetworkRequest"); 2549 if (nri == null) return; 2550 2551 if (VDBG || (DBG && nri.request.isRequest())) log("releasing " + request); 2552 nri.unlinkDeathRecipient(); 2553 mNetworkRequests.remove(request); 2554 synchronized (mUidToNetworkRequestCount) { 2555 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2556 if (requests < 1) { 2557 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2558 nri.mUid); 2559 } else if (requests == 1) { 2560 mUidToNetworkRequestCount.removeAt( 2561 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2562 } else { 2563 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2564 } 2565 } 2566 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2567 if (nri.request.isRequest()) { 2568 boolean wasKept = false; 2569 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2570 if (nai != null) { 2571 nai.removeRequest(nri.request.requestId); 2572 if (VDBG) { 2573 log(" Removing from current network " + nai.name() + 2574 ", leaving " + nai.numNetworkRequests() + " requests."); 2575 } 2576 // If there are still lingered requests on this network, don't tear it down, 2577 // but resume lingering instead. 2578 updateLingerState(nai, SystemClock.elapsedRealtime()); 2579 if (unneeded(nai)) { 2580 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2581 teardownUnneededNetwork(nai); 2582 } else { 2583 wasKept = true; 2584 } 2585 mNetworkForRequestId.remove(nri.request.requestId); 2586 } 2587 2588 // TODO: remove this code once we know that the Slog.wtf is never hit. 2589 // 2590 // Find all networks that are satisfying this request and remove the request 2591 // from their request lists. 2592 // TODO - it's my understanding that for a request there is only a single 2593 // network satisfying it, so this loop is wasteful 2594 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2595 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2596 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2597 otherNai.name() + ", but mNetworkAgentInfos says " + 2598 (nai != null ? nai.name() : "null")); 2599 } 2600 } 2601 2602 // Maintain the illusion. When this request arrived, we might have pretended 2603 // that a network connected to serve it, even though the network was already 2604 // connected. Now that this request has gone away, we might have to pretend 2605 // that the network disconnected. LegacyTypeTracker will generate that 2606 // phantom disconnect for this type. 2607 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2608 boolean doRemove = true; 2609 if (wasKept) { 2610 // check if any of the remaining requests for this network are for the 2611 // same legacy type - if so, don't remove the nai 2612 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2613 NetworkRequest otherRequest = nai.requestAt(i); 2614 if (otherRequest.legacyType == nri.request.legacyType && 2615 otherRequest.isRequest()) { 2616 if (DBG) log(" still have other legacy request - leaving"); 2617 doRemove = false; 2618 } 2619 } 2620 } 2621 2622 if (doRemove) { 2623 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2624 } 2625 } 2626 2627 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2628 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2629 nri.request); 2630 } 2631 } else { 2632 // listens don't have a singular affectedNetwork. Check all networks to see 2633 // if this listen request applies and remove it. 2634 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2635 nai.removeRequest(nri.request.requestId); 2636 if (nri.request.networkCapabilities.hasSignalStrength() && 2637 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2638 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2639 } 2640 } 2641 } 2642 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED, 0); 2643 } 2644 2645 @Override 2646 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2647 enforceConnectivityInternalPermission(); 2648 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2649 accept ? 1 : 0, always ? 1: 0, network)); 2650 } 2651 2652 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2653 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2654 " accept=" + accept + " always=" + always); 2655 2656 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2657 if (nai == null) { 2658 // Nothing to do. 2659 return; 2660 } 2661 2662 if (nai.everValidated) { 2663 // The network validated while the dialog box was up. Take no action. 2664 return; 2665 } 2666 2667 if (!nai.networkMisc.explicitlySelected) { 2668 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2669 } 2670 2671 if (accept != nai.networkMisc.acceptUnvalidated) { 2672 int oldScore = nai.getCurrentScore(); 2673 nai.networkMisc.acceptUnvalidated = accept; 2674 rematchAllNetworksAndRequests(nai, oldScore); 2675 sendUpdatedScoreToFactories(nai); 2676 } 2677 2678 if (always) { 2679 nai.asyncChannel.sendMessage( 2680 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2681 } 2682 2683 if (!accept) { 2684 // Tell the NetworkAgent to not automatically reconnect to the network. 2685 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2686 // Teardown the nework. 2687 teardownUnneededNetwork(nai); 2688 } 2689 2690 } 2691 2692 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2693 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2694 mHandler.sendMessageDelayed( 2695 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2696 PROMPT_UNVALIDATED_DELAY_MS); 2697 } 2698 2699 private void handlePromptUnvalidated(Network network) { 2700 if (VDBG) log("handlePromptUnvalidated " + network); 2701 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2702 2703 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2704 // we haven't already been told to switch to it regardless of whether it validated or not. 2705 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2706 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2707 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2708 return; 2709 } 2710 2711 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2712 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2713 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2714 intent.setClassName("com.android.settings", 2715 "com.android.settings.wifi.WifiNoInternetDialog"); 2716 2717 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2718 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2719 2720 mNotifier.showNotification(nai.network.netId, NotificationType.NO_INTERNET, nai, null, 2721 pendingIntent, true); 2722 } 2723 2724 private class InternalHandler extends Handler { 2725 public InternalHandler(Looper looper) { 2726 super(looper); 2727 } 2728 2729 @Override 2730 public void handleMessage(Message msg) { 2731 switch (msg.what) { 2732 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2733 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2734 String causedBy = null; 2735 synchronized (ConnectivityService.this) { 2736 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2737 mNetTransitionWakeLock.isHeld()) { 2738 mNetTransitionWakeLock.release(); 2739 causedBy = mNetTransitionWakeLockCausedBy; 2740 } else { 2741 break; 2742 } 2743 } 2744 if (VDBG) { 2745 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2746 log("Failed to find a new network - expiring NetTransition Wakelock"); 2747 } else { 2748 log("NetTransition Wakelock (" + 2749 (causedBy == null ? "unknown" : causedBy) + 2750 " cleared because we found a replacement network"); 2751 } 2752 } 2753 break; 2754 } 2755 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2756 handleDeprecatedGlobalHttpProxy(); 2757 break; 2758 } 2759 case EVENT_PROXY_HAS_CHANGED: { 2760 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2761 break; 2762 } 2763 case EVENT_REGISTER_NETWORK_FACTORY: { 2764 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2765 break; 2766 } 2767 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2768 handleUnregisterNetworkFactory((Messenger)msg.obj); 2769 break; 2770 } 2771 case EVENT_REGISTER_NETWORK_AGENT: { 2772 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2773 break; 2774 } 2775 case EVENT_REGISTER_NETWORK_REQUEST: 2776 case EVENT_REGISTER_NETWORK_LISTENER: { 2777 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2778 break; 2779 } 2780 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2781 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2782 handleRegisterNetworkRequestWithIntent(msg); 2783 break; 2784 } 2785 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2786 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2787 break; 2788 } 2789 case EVENT_RELEASE_NETWORK_REQUEST: { 2790 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2791 break; 2792 } 2793 case EVENT_SET_ACCEPT_UNVALIDATED: { 2794 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2795 break; 2796 } 2797 case EVENT_PROMPT_UNVALIDATED: { 2798 handlePromptUnvalidated((Network) msg.obj); 2799 break; 2800 } 2801 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2802 handleMobileDataAlwaysOn(); 2803 break; 2804 } 2805 case EVENT_REQUEST_LINKPROPERTIES: 2806 handleRequestLinkProperties((NetworkRequest) msg.obj, msg.arg1); 2807 break; 2808 case EVENT_REQUEST_NETCAPABILITIES: 2809 handleRequestNetworkCapabilities((NetworkRequest) msg.obj, msg.arg1); 2810 break; 2811 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2812 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2813 mKeepaliveTracker.handleStartKeepalive(msg); 2814 break; 2815 } 2816 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2817 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2818 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2819 int slot = msg.arg1; 2820 int reason = msg.arg2; 2821 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2822 break; 2823 } 2824 case EVENT_SYSTEM_READY: { 2825 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2826 nai.networkMonitor.systemReady = true; 2827 } 2828 break; 2829 } 2830 } 2831 } 2832 } 2833 2834 // javadoc from interface 2835 @Override 2836 public int tether(String iface) { 2837 ConnectivityManager.enforceTetherChangePermission(mContext); 2838 if (isTetheringSupported()) { 2839 final int status = mTethering.tether(iface); 2840 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2841 try { 2842 mPolicyManager.onTetheringChanged(iface, true); 2843 } catch (RemoteException e) { 2844 } 2845 } 2846 return status; 2847 } else { 2848 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2849 } 2850 } 2851 2852 // javadoc from interface 2853 @Override 2854 public int untether(String iface) { 2855 ConnectivityManager.enforceTetherChangePermission(mContext); 2856 2857 if (isTetheringSupported()) { 2858 final int status = mTethering.untether(iface); 2859 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2860 try { 2861 mPolicyManager.onTetheringChanged(iface, false); 2862 } catch (RemoteException e) { 2863 } 2864 } 2865 return status; 2866 } else { 2867 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2868 } 2869 } 2870 2871 // javadoc from interface 2872 @Override 2873 public int getLastTetherError(String iface) { 2874 enforceTetherAccessPermission(); 2875 2876 if (isTetheringSupported()) { 2877 return mTethering.getLastTetherError(iface); 2878 } else { 2879 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2880 } 2881 } 2882 2883 // TODO - proper iface API for selection by property, inspection, etc 2884 @Override 2885 public String[] getTetherableUsbRegexs() { 2886 enforceTetherAccessPermission(); 2887 if (isTetheringSupported()) { 2888 return mTethering.getTetherableUsbRegexs(); 2889 } else { 2890 return new String[0]; 2891 } 2892 } 2893 2894 @Override 2895 public String[] getTetherableWifiRegexs() { 2896 enforceTetherAccessPermission(); 2897 if (isTetheringSupported()) { 2898 return mTethering.getTetherableWifiRegexs(); 2899 } else { 2900 return new String[0]; 2901 } 2902 } 2903 2904 @Override 2905 public String[] getTetherableBluetoothRegexs() { 2906 enforceTetherAccessPermission(); 2907 if (isTetheringSupported()) { 2908 return mTethering.getTetherableBluetoothRegexs(); 2909 } else { 2910 return new String[0]; 2911 } 2912 } 2913 2914 @Override 2915 public int setUsbTethering(boolean enable) { 2916 ConnectivityManager.enforceTetherChangePermission(mContext); 2917 if (isTetheringSupported()) { 2918 return mTethering.setUsbTethering(enable); 2919 } else { 2920 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2921 } 2922 } 2923 2924 // TODO - move iface listing, queries, etc to new module 2925 // javadoc from interface 2926 @Override 2927 public String[] getTetherableIfaces() { 2928 enforceTetherAccessPermission(); 2929 return mTethering.getTetherableIfaces(); 2930 } 2931 2932 @Override 2933 public String[] getTetheredIfaces() { 2934 enforceTetherAccessPermission(); 2935 return mTethering.getTetheredIfaces(); 2936 } 2937 2938 @Override 2939 public String[] getTetheringErroredIfaces() { 2940 enforceTetherAccessPermission(); 2941 return mTethering.getErroredIfaces(); 2942 } 2943 2944 @Override 2945 public String[] getTetheredDhcpRanges() { 2946 enforceConnectivityInternalPermission(); 2947 return mTethering.getTetheredDhcpRanges(); 2948 } 2949 2950 // if ro.tether.denied = true we default to no tethering 2951 // gservices could set the secure setting to 1 though to enable it on a build where it 2952 // had previously been turned off. 2953 @Override 2954 public boolean isTetheringSupported() { 2955 enforceTetherAccessPermission(); 2956 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2957 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2958 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2959 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2960 return tetherEnabledInSettings && mUserManager.isAdminUser() && 2961 ((mTethering.getTetherableUsbRegexs().length != 0 || 2962 mTethering.getTetherableWifiRegexs().length != 0 || 2963 mTethering.getTetherableBluetoothRegexs().length != 0) && 2964 mTethering.getUpstreamIfaceTypes().length != 0); 2965 } 2966 2967 @Override 2968 public void startTethering(int type, ResultReceiver receiver, 2969 boolean showProvisioningUi) { 2970 ConnectivityManager.enforceTetherChangePermission(mContext); 2971 if (!isTetheringSupported()) { 2972 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 2973 return; 2974 } 2975 mTethering.startTethering(type, receiver, showProvisioningUi); 2976 } 2977 2978 @Override 2979 public void stopTethering(int type) { 2980 ConnectivityManager.enforceTetherChangePermission(mContext); 2981 mTethering.stopTethering(type); 2982 } 2983 2984 // Called when we lose the default network and have no replacement yet. 2985 // This will automatically be cleared after X seconds or a new default network 2986 // becomes CONNECTED, whichever happens first. The timer is started by the 2987 // first caller and not restarted by subsequent callers. 2988 private void requestNetworkTransitionWakelock(String forWhom) { 2989 int serialNum = 0; 2990 synchronized (this) { 2991 if (mNetTransitionWakeLock.isHeld()) return; 2992 serialNum = ++mNetTransitionWakeLockSerialNumber; 2993 mNetTransitionWakeLock.acquire(); 2994 mNetTransitionWakeLockCausedBy = forWhom; 2995 } 2996 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2997 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2998 mNetTransitionWakeLockTimeout); 2999 return; 3000 } 3001 3002 // 100 percent is full good, 0 is full bad. 3003 @Override 3004 public void reportInetCondition(int networkType, int percentage) { 3005 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 3006 if (nai == null) return; 3007 reportNetworkConnectivity(nai.network, percentage > 50); 3008 } 3009 3010 @Override 3011 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 3012 enforceAccessPermission(); 3013 enforceInternetPermission(); 3014 3015 NetworkAgentInfo nai; 3016 if (network == null) { 3017 nai = getDefaultNetwork(); 3018 } else { 3019 nai = getNetworkAgentInfoForNetwork(network); 3020 } 3021 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 3022 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 3023 return; 3024 } 3025 // Revalidate if the app report does not match our current validated state. 3026 if (hasConnectivity == nai.lastValidated) return; 3027 final int uid = Binder.getCallingUid(); 3028 if (DBG) { 3029 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 3030 ") by " + uid); 3031 } 3032 synchronized (nai) { 3033 // Validating a network that has not yet connected could result in a call to 3034 // rematchNetworkAndRequests() which is not meant to work on such networks. 3035 if (!nai.everConnected) return; 3036 3037 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 3038 3039 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 3040 } 3041 } 3042 3043 private ProxyInfo getDefaultProxy() { 3044 // this information is already available as a world read/writable jvm property 3045 // so this API change wouldn't have a benifit. It also breaks the passing 3046 // of proxy info to all the JVMs. 3047 // enforceAccessPermission(); 3048 synchronized (mProxyLock) { 3049 ProxyInfo ret = mGlobalProxy; 3050 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3051 return ret; 3052 } 3053 } 3054 3055 @Override 3056 public ProxyInfo getProxyForNetwork(Network network) { 3057 if (network == null) return getDefaultProxy(); 3058 final ProxyInfo globalProxy = getGlobalProxy(); 3059 if (globalProxy != null) return globalProxy; 3060 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3061 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3062 // caller may not have. 3063 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3064 if (nai == null) return null; 3065 synchronized (nai) { 3066 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3067 if (proxyInfo == null) return null; 3068 return new ProxyInfo(proxyInfo); 3069 } 3070 } 3071 3072 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3073 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3074 // proxy is null then there is no proxy in place). 3075 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3076 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3077 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3078 proxy = null; 3079 } 3080 return proxy; 3081 } 3082 3083 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3084 // better for determining if a new proxy broadcast is necessary: 3085 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3086 // avoid unnecessary broadcasts. 3087 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3088 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3089 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3090 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3091 // all set. 3092 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3093 a = canonicalizeProxyInfo(a); 3094 b = canonicalizeProxyInfo(b); 3095 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3096 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3097 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3098 } 3099 3100 public void setGlobalProxy(ProxyInfo proxyProperties) { 3101 enforceConnectivityInternalPermission(); 3102 3103 synchronized (mProxyLock) { 3104 if (proxyProperties == mGlobalProxy) return; 3105 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3106 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3107 3108 String host = ""; 3109 int port = 0; 3110 String exclList = ""; 3111 String pacFileUrl = ""; 3112 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3113 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3114 if (!proxyProperties.isValid()) { 3115 if (DBG) 3116 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3117 return; 3118 } 3119 mGlobalProxy = new ProxyInfo(proxyProperties); 3120 host = mGlobalProxy.getHost(); 3121 port = mGlobalProxy.getPort(); 3122 exclList = mGlobalProxy.getExclusionListAsString(); 3123 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3124 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3125 } 3126 } else { 3127 mGlobalProxy = null; 3128 } 3129 ContentResolver res = mContext.getContentResolver(); 3130 final long token = Binder.clearCallingIdentity(); 3131 try { 3132 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3133 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3134 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3135 exclList); 3136 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3137 } finally { 3138 Binder.restoreCallingIdentity(token); 3139 } 3140 3141 if (mGlobalProxy == null) { 3142 proxyProperties = mDefaultProxy; 3143 } 3144 sendProxyBroadcast(proxyProperties); 3145 } 3146 } 3147 3148 private void loadGlobalProxy() { 3149 ContentResolver res = mContext.getContentResolver(); 3150 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3151 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3152 String exclList = Settings.Global.getString(res, 3153 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3154 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3155 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3156 ProxyInfo proxyProperties; 3157 if (!TextUtils.isEmpty(pacFileUrl)) { 3158 proxyProperties = new ProxyInfo(pacFileUrl); 3159 } else { 3160 proxyProperties = new ProxyInfo(host, port, exclList); 3161 } 3162 if (!proxyProperties.isValid()) { 3163 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3164 return; 3165 } 3166 3167 synchronized (mProxyLock) { 3168 mGlobalProxy = proxyProperties; 3169 } 3170 } 3171 } 3172 3173 public ProxyInfo getGlobalProxy() { 3174 // this information is already available as a world read/writable jvm property 3175 // so this API change wouldn't have a benifit. It also breaks the passing 3176 // of proxy info to all the JVMs. 3177 // enforceAccessPermission(); 3178 synchronized (mProxyLock) { 3179 return mGlobalProxy; 3180 } 3181 } 3182 3183 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3184 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3185 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3186 proxy = null; 3187 } 3188 synchronized (mProxyLock) { 3189 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3190 if (mDefaultProxy == proxy) return; // catches repeated nulls 3191 if (proxy != null && !proxy.isValid()) { 3192 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3193 return; 3194 } 3195 3196 // This call could be coming from the PacManager, containing the port of the local 3197 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3198 // global (to get the correct local port), and send a broadcast. 3199 // TODO: Switch PacManager to have its own message to send back rather than 3200 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3201 if ((mGlobalProxy != null) && (proxy != null) 3202 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3203 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3204 mGlobalProxy = proxy; 3205 sendProxyBroadcast(mGlobalProxy); 3206 return; 3207 } 3208 mDefaultProxy = proxy; 3209 3210 if (mGlobalProxy != null) return; 3211 if (!mDefaultProxyDisabled) { 3212 sendProxyBroadcast(proxy); 3213 } 3214 } 3215 } 3216 3217 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3218 // This method gets called when any network changes proxy, but the broadcast only ever contains 3219 // the default proxy (even if it hasn't changed). 3220 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3221 // world where an app might be bound to a non-default network. 3222 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3223 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3224 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3225 3226 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3227 sendProxyBroadcast(getDefaultProxy()); 3228 } 3229 } 3230 3231 private void handleDeprecatedGlobalHttpProxy() { 3232 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3233 Settings.Global.HTTP_PROXY); 3234 if (!TextUtils.isEmpty(proxy)) { 3235 String data[] = proxy.split(":"); 3236 if (data.length == 0) { 3237 return; 3238 } 3239 3240 String proxyHost = data[0]; 3241 int proxyPort = 8080; 3242 if (data.length > 1) { 3243 try { 3244 proxyPort = Integer.parseInt(data[1]); 3245 } catch (NumberFormatException e) { 3246 return; 3247 } 3248 } 3249 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3250 setGlobalProxy(p); 3251 } 3252 } 3253 3254 private void sendProxyBroadcast(ProxyInfo proxy) { 3255 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3256 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3257 if (DBG) log("sending Proxy Broadcast for " + proxy); 3258 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3259 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3260 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3261 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3262 final long ident = Binder.clearCallingIdentity(); 3263 try { 3264 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3265 } finally { 3266 Binder.restoreCallingIdentity(ident); 3267 } 3268 } 3269 3270 private static class SettingsObserver extends ContentObserver { 3271 final private HashMap<Uri, Integer> mUriEventMap; 3272 final private Context mContext; 3273 final private Handler mHandler; 3274 3275 SettingsObserver(Context context, Handler handler) { 3276 super(null); 3277 mUriEventMap = new HashMap<Uri, Integer>(); 3278 mContext = context; 3279 mHandler = handler; 3280 } 3281 3282 void observe(Uri uri, int what) { 3283 mUriEventMap.put(uri, what); 3284 final ContentResolver resolver = mContext.getContentResolver(); 3285 resolver.registerContentObserver(uri, false, this); 3286 } 3287 3288 @Override 3289 public void onChange(boolean selfChange) { 3290 Slog.wtf(TAG, "Should never be reached."); 3291 } 3292 3293 @Override 3294 public void onChange(boolean selfChange, Uri uri) { 3295 final Integer what = mUriEventMap.get(uri); 3296 if (what != null) { 3297 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3298 } else { 3299 loge("No matching event to send for URI=" + uri); 3300 } 3301 } 3302 } 3303 3304 private static void log(String s) { 3305 Slog.d(TAG, s); 3306 } 3307 3308 private static void loge(String s) { 3309 Slog.e(TAG, s); 3310 } 3311 3312 private static <T> T checkNotNull(T value, String message) { 3313 if (value == null) { 3314 throw new NullPointerException(message); 3315 } 3316 return value; 3317 } 3318 3319 /** 3320 * Prepare for a VPN application. 3321 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3322 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3323 * 3324 * @param oldPackage Package name of the application which currently controls VPN, which will 3325 * be replaced. If there is no such application, this should should either be 3326 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3327 * @param newPackage Package name of the application which should gain control of VPN, or 3328 * {@code null} to disable. 3329 * @param userId User for whom to prepare the new VPN. 3330 * 3331 * @hide 3332 */ 3333 @Override 3334 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3335 int userId) { 3336 enforceCrossUserPermission(userId); 3337 throwIfLockdownEnabled(); 3338 3339 synchronized(mVpns) { 3340 Vpn vpn = mVpns.get(userId); 3341 if (vpn != null) { 3342 return vpn.prepare(oldPackage, newPackage); 3343 } else { 3344 return false; 3345 } 3346 } 3347 } 3348 3349 /** 3350 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3351 * This method is used by system-privileged apps. 3352 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3353 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3354 * 3355 * @param packageName The package for which authorization state should change. 3356 * @param userId User for whom {@code packageName} is installed. 3357 * @param authorized {@code true} if this app should be able to start a VPN connection without 3358 * explicit user approval, {@code false} if not. 3359 * 3360 * @hide 3361 */ 3362 @Override 3363 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3364 enforceCrossUserPermission(userId); 3365 3366 synchronized(mVpns) { 3367 Vpn vpn = mVpns.get(userId); 3368 if (vpn != null) { 3369 vpn.setPackageAuthorization(packageName, authorized); 3370 } 3371 } 3372 } 3373 3374 /** 3375 * Configure a TUN interface and return its file descriptor. Parameters 3376 * are encoded and opaque to this class. This method is used by VpnBuilder 3377 * and not available in ConnectivityManager. Permissions are checked in 3378 * Vpn class. 3379 * @hide 3380 */ 3381 @Override 3382 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3383 throwIfLockdownEnabled(); 3384 int user = UserHandle.getUserId(Binder.getCallingUid()); 3385 synchronized(mVpns) { 3386 return mVpns.get(user).establish(config); 3387 } 3388 } 3389 3390 /** 3391 * Start legacy VPN, controlling native daemons as needed. Creates a 3392 * secondary thread to perform connection work, returning quickly. 3393 */ 3394 @Override 3395 public void startLegacyVpn(VpnProfile profile) { 3396 throwIfLockdownEnabled(); 3397 final LinkProperties egress = getActiveLinkProperties(); 3398 if (egress == null) { 3399 throw new IllegalStateException("Missing active network connection"); 3400 } 3401 int user = UserHandle.getUserId(Binder.getCallingUid()); 3402 synchronized(mVpns) { 3403 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3404 } 3405 } 3406 3407 /** 3408 * Return the information of the ongoing legacy VPN. This method is used 3409 * by VpnSettings and not available in ConnectivityManager. Permissions 3410 * are checked in Vpn class. 3411 */ 3412 @Override 3413 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3414 enforceCrossUserPermission(userId); 3415 3416 synchronized(mVpns) { 3417 return mVpns.get(userId).getLegacyVpnInfo(); 3418 } 3419 } 3420 3421 /** 3422 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3423 * and not available in ConnectivityManager. 3424 */ 3425 @Override 3426 public VpnInfo[] getAllVpnInfo() { 3427 enforceConnectivityInternalPermission(); 3428 if (mLockdownEnabled) { 3429 return new VpnInfo[0]; 3430 } 3431 3432 synchronized(mVpns) { 3433 List<VpnInfo> infoList = new ArrayList<>(); 3434 for (int i = 0; i < mVpns.size(); i++) { 3435 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3436 if (info != null) { 3437 infoList.add(info); 3438 } 3439 } 3440 return infoList.toArray(new VpnInfo[infoList.size()]); 3441 } 3442 } 3443 3444 /** 3445 * @return VPN information for accounting, or null if we can't retrieve all required 3446 * information, e.g primary underlying iface. 3447 */ 3448 @Nullable 3449 private VpnInfo createVpnInfo(Vpn vpn) { 3450 VpnInfo info = vpn.getVpnInfo(); 3451 if (info == null) { 3452 return null; 3453 } 3454 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3455 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3456 // the underlyingNetworks list. 3457 if (underlyingNetworks == null) { 3458 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3459 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3460 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3461 } 3462 } else if (underlyingNetworks.length > 0) { 3463 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3464 if (linkProperties != null) { 3465 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3466 } 3467 } 3468 return info.primaryUnderlyingIface == null ? null : info; 3469 } 3470 3471 /** 3472 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3473 * VpnDialogs and not available in ConnectivityManager. 3474 * Permissions are checked in Vpn class. 3475 * @hide 3476 */ 3477 @Override 3478 public VpnConfig getVpnConfig(int userId) { 3479 enforceCrossUserPermission(userId); 3480 synchronized(mVpns) { 3481 Vpn vpn = mVpns.get(userId); 3482 if (vpn != null) { 3483 return vpn.getVpnConfig(); 3484 } else { 3485 return null; 3486 } 3487 } 3488 } 3489 3490 @Override 3491 public boolean updateLockdownVpn() { 3492 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3493 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3494 return false; 3495 } 3496 3497 // Tear down existing lockdown if profile was removed 3498 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3499 if (mLockdownEnabled) { 3500 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3501 final VpnProfile profile = VpnProfile.decode( 3502 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3503 if (profile == null) { 3504 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3505 setLockdownTracker(null); 3506 return true; 3507 } 3508 int user = UserHandle.getUserId(Binder.getCallingUid()); 3509 synchronized(mVpns) { 3510 Vpn vpn = mVpns.get(user); 3511 if (vpn == null) { 3512 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3513 return false; 3514 } 3515 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3516 } 3517 } else { 3518 setLockdownTracker(null); 3519 } 3520 3521 return true; 3522 } 3523 3524 /** 3525 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3526 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3527 */ 3528 private void setLockdownTracker(LockdownVpnTracker tracker) { 3529 // Shutdown any existing tracker 3530 final LockdownVpnTracker existing = mLockdownTracker; 3531 mLockdownTracker = null; 3532 if (existing != null) { 3533 existing.shutdown(); 3534 } 3535 3536 try { 3537 if (tracker != null) { 3538 mNetd.setFirewallEnabled(true); 3539 mNetd.setFirewallInterfaceRule("lo", true); 3540 mLockdownTracker = tracker; 3541 mLockdownTracker.init(); 3542 } else { 3543 mNetd.setFirewallEnabled(false); 3544 } 3545 } catch (RemoteException e) { 3546 // ignored; NMS lives inside system_server 3547 } 3548 } 3549 3550 private void throwIfLockdownEnabled() { 3551 if (mLockdownEnabled) { 3552 throw new IllegalStateException("Unavailable in lockdown mode"); 3553 } 3554 } 3555 3556 /** 3557 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3558 * some setup and then call {@code establish()} to connect. 3559 * 3560 * @return {@code true} if the service was started, the service was already connected, or there 3561 * was no always-on VPN to start. {@code false} otherwise. 3562 */ 3563 private boolean startAlwaysOnVpn(int userId) { 3564 synchronized (mVpns) { 3565 Vpn vpn = mVpns.get(userId); 3566 if (vpn == null) { 3567 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3568 // exists already. 3569 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3570 return false; 3571 } 3572 3573 return vpn.startAlwaysOnVpn(); 3574 } 3575 } 3576 3577 @Override 3578 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3579 enforceConnectivityInternalPermission(); 3580 enforceCrossUserPermission(userId); 3581 3582 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3583 if (LockdownVpnTracker.isEnabled()) { 3584 return false; 3585 } 3586 3587 synchronized (mVpns) { 3588 Vpn vpn = mVpns.get(userId); 3589 if (vpn == null) { 3590 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3591 return false; 3592 } 3593 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3594 return false; 3595 } 3596 if (!startAlwaysOnVpn(userId)) { 3597 vpn.setAlwaysOnPackage(null, false); 3598 return false; 3599 } 3600 3601 vpn.saveAlwaysOnPackage(); 3602 } 3603 return true; 3604 } 3605 3606 @Override 3607 public String getAlwaysOnVpnPackage(int userId) { 3608 enforceConnectivityInternalPermission(); 3609 enforceCrossUserPermission(userId); 3610 3611 synchronized (mVpns) { 3612 Vpn vpn = mVpns.get(userId); 3613 if (vpn == null) { 3614 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3615 return null; 3616 } 3617 return vpn.getAlwaysOnPackage(); 3618 } 3619 } 3620 3621 @Override 3622 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3623 // TODO: Remove? Any reason to trigger a provisioning check? 3624 return -1; 3625 } 3626 3627 /** Location to an updatable file listing carrier provisioning urls. 3628 * An example: 3629 * 3630 * <?xml version="1.0" encoding="utf-8"?> 3631 * <provisioningUrls> 3632 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3633 * </provisioningUrls> 3634 */ 3635 private static final String PROVISIONING_URL_PATH = 3636 "/data/misc/radio/provisioning_urls.xml"; 3637 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3638 3639 /** XML tag for root element. */ 3640 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3641 /** XML tag for individual url */ 3642 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3643 /** XML attribute for mcc */ 3644 private static final String ATTR_MCC = "mcc"; 3645 /** XML attribute for mnc */ 3646 private static final String ATTR_MNC = "mnc"; 3647 3648 private String getProvisioningUrlBaseFromFile() { 3649 FileReader fileReader = null; 3650 XmlPullParser parser = null; 3651 Configuration config = mContext.getResources().getConfiguration(); 3652 3653 try { 3654 fileReader = new FileReader(mProvisioningUrlFile); 3655 parser = Xml.newPullParser(); 3656 parser.setInput(fileReader); 3657 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3658 3659 while (true) { 3660 XmlUtils.nextElement(parser); 3661 3662 String element = parser.getName(); 3663 if (element == null) break; 3664 3665 if (element.equals(TAG_PROVISIONING_URL)) { 3666 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3667 try { 3668 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3669 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3670 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3671 parser.next(); 3672 if (parser.getEventType() == XmlPullParser.TEXT) { 3673 return parser.getText(); 3674 } 3675 } 3676 } 3677 } catch (NumberFormatException e) { 3678 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3679 } 3680 } 3681 } 3682 return null; 3683 } catch (FileNotFoundException e) { 3684 loge("Carrier Provisioning Urls file not found"); 3685 } catch (XmlPullParserException e) { 3686 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3687 } catch (IOException e) { 3688 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3689 } finally { 3690 if (fileReader != null) { 3691 try { 3692 fileReader.close(); 3693 } catch (IOException e) {} 3694 } 3695 } 3696 return null; 3697 } 3698 3699 @Override 3700 public String getMobileProvisioningUrl() { 3701 enforceConnectivityInternalPermission(); 3702 String url = getProvisioningUrlBaseFromFile(); 3703 if (TextUtils.isEmpty(url)) { 3704 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3705 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3706 } else { 3707 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3708 } 3709 // populate the iccid, imei and phone number in the provisioning url. 3710 if (!TextUtils.isEmpty(url)) { 3711 String phoneNumber = mTelephonyManager.getLine1Number(); 3712 if (TextUtils.isEmpty(phoneNumber)) { 3713 phoneNumber = "0000000000"; 3714 } 3715 url = String.format(url, 3716 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3717 mTelephonyManager.getDeviceId() /* IMEI */, 3718 phoneNumber /* Phone numer */); 3719 } 3720 3721 return url; 3722 } 3723 3724 @Override 3725 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3726 String action) { 3727 enforceConnectivityInternalPermission(); 3728 final long ident = Binder.clearCallingIdentity(); 3729 try { 3730 // Concatenate the range of types onto the range of NetIDs. 3731 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3732 mNotifier.setProvNotificationVisible(visible, id, action); 3733 } finally { 3734 Binder.restoreCallingIdentity(ident); 3735 } 3736 } 3737 3738 @Override 3739 public void setAirplaneMode(boolean enable) { 3740 enforceConnectivityInternalPermission(); 3741 final long ident = Binder.clearCallingIdentity(); 3742 try { 3743 final ContentResolver cr = mContext.getContentResolver(); 3744 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3745 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3746 intent.putExtra("state", enable); 3747 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3748 } finally { 3749 Binder.restoreCallingIdentity(ident); 3750 } 3751 } 3752 3753 private void onUserStart(int userId) { 3754 synchronized(mVpns) { 3755 Vpn userVpn = mVpns.get(userId); 3756 if (userVpn != null) { 3757 loge("Starting user already has a VPN"); 3758 return; 3759 } 3760 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3761 mVpns.put(userId, userVpn); 3762 3763 final ContentResolver cr = mContext.getContentResolver(); 3764 String alwaysOnPackage = Settings.Secure.getStringForUser(cr, 3765 Settings.Secure.ALWAYS_ON_VPN_APP, userId); 3766 final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, 3767 Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; 3768 if (alwaysOnPackage != null) { 3769 userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); 3770 } 3771 } 3772 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3773 updateLockdownVpn(); 3774 } 3775 } 3776 3777 private void onUserStop(int userId) { 3778 synchronized(mVpns) { 3779 Vpn userVpn = mVpns.get(userId); 3780 if (userVpn == null) { 3781 loge("Stopped user has no VPN"); 3782 return; 3783 } 3784 userVpn.onUserStopped(); 3785 mVpns.delete(userId); 3786 } 3787 } 3788 3789 private void onUserAdded(int userId) { 3790 synchronized(mVpns) { 3791 final int vpnsSize = mVpns.size(); 3792 for (int i = 0; i < vpnsSize; i++) { 3793 Vpn vpn = mVpns.valueAt(i); 3794 vpn.onUserAdded(userId); 3795 } 3796 } 3797 } 3798 3799 private void onUserRemoved(int userId) { 3800 synchronized(mVpns) { 3801 final int vpnsSize = mVpns.size(); 3802 for (int i = 0; i < vpnsSize; i++) { 3803 Vpn vpn = mVpns.valueAt(i); 3804 vpn.onUserRemoved(userId); 3805 } 3806 } 3807 } 3808 3809 private void onUserUnlocked(int userId) { 3810 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3811 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3812 updateLockdownVpn(); 3813 } else { 3814 startAlwaysOnVpn(userId); 3815 } 3816 } 3817 3818 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3819 @Override 3820 public void onReceive(Context context, Intent intent) { 3821 final String action = intent.getAction(); 3822 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3823 if (userId == UserHandle.USER_NULL) return; 3824 3825 if (Intent.ACTION_USER_STARTED.equals(action)) { 3826 onUserStart(userId); 3827 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3828 onUserStop(userId); 3829 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3830 onUserAdded(userId); 3831 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3832 onUserRemoved(userId); 3833 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3834 onUserUnlocked(userId); 3835 } 3836 } 3837 }; 3838 3839 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3840 new HashMap<Messenger, NetworkFactoryInfo>(); 3841 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3842 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3843 3844 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3845 // Map from UID to number of NetworkRequests that UID has filed. 3846 @GuardedBy("mUidToNetworkRequestCount") 3847 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3848 3849 private static class NetworkFactoryInfo { 3850 public final String name; 3851 public final Messenger messenger; 3852 public final AsyncChannel asyncChannel; 3853 3854 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3855 this.name = name; 3856 this.messenger = messenger; 3857 this.asyncChannel = asyncChannel; 3858 } 3859 } 3860 3861 private void ensureNetworkRequestHasType(NetworkRequest request) { 3862 if (request.type == NetworkRequest.Type.NONE) { 3863 throw new IllegalArgumentException( 3864 "All NetworkRequests in ConnectivityService must have a type"); 3865 } 3866 } 3867 3868 /** 3869 * Tracks info about the requester. 3870 * Also used to notice when the calling process dies so we can self-expire 3871 */ 3872 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3873 final NetworkRequest request; 3874 final PendingIntent mPendingIntent; 3875 boolean mPendingIntentSent; 3876 private final IBinder mBinder; 3877 final int mPid; 3878 final int mUid; 3879 final Messenger messenger; 3880 3881 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 3882 request = r; 3883 ensureNetworkRequestHasType(request); 3884 mPendingIntent = pi; 3885 messenger = null; 3886 mBinder = null; 3887 mPid = getCallingPid(); 3888 mUid = getCallingUid(); 3889 enforceRequestCountLimit(); 3890 } 3891 3892 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 3893 super(); 3894 messenger = m; 3895 request = r; 3896 ensureNetworkRequestHasType(request); 3897 mBinder = binder; 3898 mPid = getCallingPid(); 3899 mUid = getCallingUid(); 3900 mPendingIntent = null; 3901 enforceRequestCountLimit(); 3902 3903 try { 3904 mBinder.linkToDeath(this, 0); 3905 } catch (RemoteException e) { 3906 binderDied(); 3907 } 3908 } 3909 3910 private void enforceRequestCountLimit() { 3911 synchronized (mUidToNetworkRequestCount) { 3912 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 3913 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 3914 throw new IllegalArgumentException("Too many NetworkRequests filed"); 3915 } 3916 mUidToNetworkRequestCount.put(mUid, networkRequests); 3917 } 3918 } 3919 3920 void unlinkDeathRecipient() { 3921 if (mBinder != null) { 3922 mBinder.unlinkToDeath(this, 0); 3923 } 3924 } 3925 3926 public void binderDied() { 3927 log("ConnectivityService NetworkRequestInfo binderDied(" + 3928 request + ", " + mBinder + ")"); 3929 releaseNetworkRequest(request); 3930 } 3931 3932 public String toString() { 3933 return "uid/pid:" + mUid + "/" + mPid + " " + request + 3934 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3935 } 3936 } 3937 3938 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3939 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3940 if (badCapability != null) { 3941 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3942 } 3943 } 3944 3945 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3946 final SortedSet<Integer> thresholds = new TreeSet(); 3947 synchronized (nai) { 3948 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3949 if (nri.request.networkCapabilities.hasSignalStrength() && 3950 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3951 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3952 } 3953 } 3954 } 3955 return new ArrayList<Integer>(thresholds); 3956 } 3957 3958 private void updateSignalStrengthThresholds( 3959 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3960 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3961 Bundle thresholds = new Bundle(); 3962 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3963 3964 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 3965 String detail; 3966 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3967 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3968 } else { 3969 detail = reason; 3970 } 3971 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3972 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3973 } 3974 3975 nai.asyncChannel.sendMessage( 3976 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3977 0, 0, thresholds); 3978 } 3979 3980 @Override 3981 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3982 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3983 final NetworkRequest.Type type = (networkCapabilities == null) 3984 ? NetworkRequest.Type.TRACK_DEFAULT 3985 : NetworkRequest.Type.REQUEST; 3986 // If the requested networkCapabilities is null, take them instead from 3987 // the default network request. This allows callers to keep track of 3988 // the system default network. 3989 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 3990 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 3991 enforceAccessPermission(); 3992 } else { 3993 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3994 enforceNetworkRequestPermissions(networkCapabilities); 3995 // TODO: this is incorrect. We mark the request as metered or not depending on the state 3996 // of the app when the request is filed, but we never change the request if the app 3997 // changes network state. http://b/29964605 3998 enforceMeteredApnPolicy(networkCapabilities); 3999 } 4000 ensureRequestableCapabilities(networkCapabilities); 4001 4002 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 4003 throw new IllegalArgumentException("Bad timeout specified"); 4004 } 4005 4006 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 4007 .equals(networkCapabilities.getNetworkSpecifier())) { 4008 throw new IllegalArgumentException("Invalid network specifier - must not be '" 4009 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 4010 } 4011 4012 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4013 nextNetworkRequestId(), type); 4014 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4015 if (DBG) log("requestNetwork for " + nri); 4016 4017 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4018 if (timeoutMs > 0) { 4019 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4020 nri), timeoutMs); 4021 } 4022 return networkRequest; 4023 } 4024 4025 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4026 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4027 enforceConnectivityRestrictedNetworksPermission(); 4028 } else { 4029 enforceChangePermission(); 4030 } 4031 } 4032 4033 @Override 4034 public boolean requestBandwidthUpdate(Network network) { 4035 enforceAccessPermission(); 4036 NetworkAgentInfo nai = null; 4037 if (network == null) { 4038 return false; 4039 } 4040 synchronized (mNetworkForNetId) { 4041 nai = mNetworkForNetId.get(network.netId); 4042 } 4043 if (nai != null) { 4044 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4045 return true; 4046 } 4047 return false; 4048 } 4049 4050 private boolean isSystem(int uid) { 4051 return uid < Process.FIRST_APPLICATION_UID; 4052 } 4053 4054 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4055 final int uid = Binder.getCallingUid(); 4056 if (isSystem(uid)) { 4057 return; 4058 } 4059 // if UID is restricted, don't allow them to bring up metered APNs 4060 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 4061 final int uidRules; 4062 synchronized(mRulesLock) { 4063 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 4064 } 4065 if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 4066 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { 4067 // we could silently fail or we can filter the available nets to only give 4068 // them those they have access to. Chose the more useful option. 4069 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4070 } 4071 } 4072 } 4073 4074 @Override 4075 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4076 PendingIntent operation) { 4077 checkNotNull(operation, "PendingIntent cannot be null."); 4078 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4079 enforceNetworkRequestPermissions(networkCapabilities); 4080 enforceMeteredApnPolicy(networkCapabilities); 4081 ensureRequestableCapabilities(networkCapabilities); 4082 4083 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4084 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4085 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4086 if (DBG) log("pendingRequest for " + nri); 4087 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4088 nri)); 4089 return networkRequest; 4090 } 4091 4092 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4093 mHandler.sendMessageDelayed( 4094 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4095 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4096 } 4097 4098 @Override 4099 public void releasePendingNetworkRequest(PendingIntent operation) { 4100 checkNotNull(operation, "PendingIntent cannot be null."); 4101 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4102 getCallingUid(), 0, operation)); 4103 } 4104 4105 // In order to implement the compatibility measure for pre-M apps that call 4106 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4107 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4108 // This ensures it has permission to do so. 4109 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4110 if (nc == null) { 4111 return false; 4112 } 4113 int[] transportTypes = nc.getTransportTypes(); 4114 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4115 return false; 4116 } 4117 try { 4118 mContext.enforceCallingOrSelfPermission( 4119 android.Manifest.permission.ACCESS_WIFI_STATE, 4120 "ConnectivityService"); 4121 } catch (SecurityException e) { 4122 return false; 4123 } 4124 return true; 4125 } 4126 4127 @Override 4128 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4129 Messenger messenger, IBinder binder) { 4130 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4131 enforceAccessPermission(); 4132 } 4133 4134 NetworkRequest networkRequest = new NetworkRequest( 4135 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4136 NetworkRequest.Type.LISTEN); 4137 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4138 if (VDBG) log("listenForNetwork for " + nri); 4139 4140 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4141 return networkRequest; 4142 } 4143 4144 @Override 4145 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4146 PendingIntent operation) { 4147 checkNotNull(operation, "PendingIntent cannot be null."); 4148 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4149 enforceAccessPermission(); 4150 } 4151 4152 NetworkRequest networkRequest = new NetworkRequest( 4153 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4154 NetworkRequest.Type.LISTEN); 4155 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4156 if (VDBG) log("pendingListenForNetwork for " + nri); 4157 4158 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4159 } 4160 4161 @Override 4162 public void requestLinkProperties(NetworkRequest networkRequest) { 4163 ensureNetworkRequestHasType(networkRequest); 4164 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4165 mHandler.sendMessage(mHandler.obtainMessage( 4166 EVENT_REQUEST_LINKPROPERTIES, getCallingUid(), 0, networkRequest)); 4167 } 4168 4169 @Override 4170 public void requestNetworkCapabilities(NetworkRequest networkRequest) { 4171 ensureNetworkRequestHasType(networkRequest); 4172 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4173 mHandler.sendMessage(mHandler.obtainMessage( 4174 EVENT_REQUEST_NETCAPABILITIES, getCallingUid(), 0, networkRequest)); 4175 } 4176 4177 @Override 4178 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4179 ensureNetworkRequestHasType(networkRequest); 4180 mHandler.sendMessage(mHandler.obtainMessage( 4181 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4182 } 4183 4184 @Override 4185 public void registerNetworkFactory(Messenger messenger, String name) { 4186 enforceConnectivityInternalPermission(); 4187 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4188 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4189 } 4190 4191 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4192 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4193 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4194 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4195 } 4196 4197 @Override 4198 public void unregisterNetworkFactory(Messenger messenger) { 4199 enforceConnectivityInternalPermission(); 4200 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4201 } 4202 4203 private void handleUnregisterNetworkFactory(Messenger messenger) { 4204 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4205 if (nfi == null) { 4206 loge("Failed to find Messenger in unregisterNetworkFactory"); 4207 return; 4208 } 4209 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4210 } 4211 4212 /** 4213 * NetworkAgentInfo supporting a request by requestId. 4214 * These have already been vetted (their Capabilities satisfy the request) 4215 * and the are the highest scored network available. 4216 * the are keyed off the Requests requestId. 4217 */ 4218 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4219 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4220 new SparseArray<NetworkAgentInfo>(); 4221 4222 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4223 @GuardedBy("mNetworkForNetId") 4224 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4225 new SparseArray<NetworkAgentInfo>(); 4226 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4227 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4228 // there may not be a strict 1:1 correlation between the two. 4229 @GuardedBy("mNetworkForNetId") 4230 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4231 4232 // NetworkAgentInfo keyed off its connecting messenger 4233 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4234 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4235 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4236 new HashMap<Messenger, NetworkAgentInfo>(); 4237 4238 @GuardedBy("mBlockedAppUids") 4239 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4240 4241 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4242 private final NetworkRequest mDefaultRequest; 4243 4244 // Request used to optionally keep mobile data active even when higher 4245 // priority networks like Wi-Fi are active. 4246 private final NetworkRequest mDefaultMobileDataRequest; 4247 4248 private NetworkAgentInfo getDefaultNetwork() { 4249 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4250 } 4251 4252 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4253 return nai == getDefaultNetwork(); 4254 } 4255 4256 private boolean isDefaultRequest(NetworkRequestInfo nri) { 4257 return nri.request.requestId == mDefaultRequest.requestId; 4258 } 4259 4260 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4261 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4262 int currentScore, NetworkMisc networkMisc) { 4263 enforceConnectivityInternalPermission(); 4264 4265 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4266 // satisfies mDefaultRequest. 4267 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4268 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4269 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4270 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4271 synchronized (this) { 4272 nai.networkMonitor.systemReady = mSystemReady; 4273 } 4274 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, 4275 networkInfo.getExtraInfo()); 4276 if (DBG) log("registerNetworkAgent " + nai); 4277 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4278 return nai.network.netId; 4279 } 4280 4281 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4282 if (VDBG) log("Got NetworkAgent Messenger"); 4283 mNetworkAgentInfos.put(na.messenger, na); 4284 synchronized (mNetworkForNetId) { 4285 mNetworkForNetId.put(na.network.netId, na); 4286 } 4287 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4288 NetworkInfo networkInfo = na.networkInfo; 4289 na.networkInfo = null; 4290 updateNetworkInfo(na, networkInfo); 4291 } 4292 4293 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4294 LinkProperties newLp = networkAgent.linkProperties; 4295 int netId = networkAgent.network.netId; 4296 4297 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4298 // we do anything else, make sure its LinkProperties are accurate. 4299 if (networkAgent.clatd != null) { 4300 networkAgent.clatd.fixupLinkProperties(oldLp); 4301 } 4302 4303 updateInterfaces(newLp, oldLp, netId); 4304 updateMtu(newLp, oldLp); 4305 // TODO - figure out what to do for clat 4306// for (LinkProperties lp : newLp.getStackedLinks()) { 4307// updateMtu(lp, null); 4308// } 4309 updateTcpBufferSizes(networkAgent); 4310 4311 updateRoutes(newLp, oldLp, netId); 4312 updateDnses(newLp, oldLp, netId); 4313 4314 updateClat(newLp, oldLp, networkAgent); 4315 if (isDefaultNetwork(networkAgent)) { 4316 handleApplyDefaultProxy(newLp.getHttpProxy()); 4317 } else { 4318 updateProxy(newLp, oldLp, networkAgent); 4319 } 4320 // TODO - move this check to cover the whole function 4321 if (!Objects.equals(newLp, oldLp)) { 4322 notifyIfacesChangedForNetworkStats(); 4323 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4324 } 4325 4326 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4327 } 4328 4329 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4330 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4331 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4332 4333 if (!wasRunningClat && shouldRunClat) { 4334 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4335 nai.clatd.start(); 4336 } else if (wasRunningClat && !shouldRunClat) { 4337 nai.clatd.stop(); 4338 } 4339 } 4340 4341 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4342 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4343 if (oldLp != null) { 4344 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4345 } else if (newLp != null) { 4346 interfaceDiff.added = newLp.getAllInterfaceNames(); 4347 } 4348 for (String iface : interfaceDiff.added) { 4349 try { 4350 if (DBG) log("Adding iface " + iface + " to network " + netId); 4351 mNetd.addInterfaceToNetwork(iface, netId); 4352 } catch (Exception e) { 4353 loge("Exception adding interface: " + e); 4354 } 4355 } 4356 for (String iface : interfaceDiff.removed) { 4357 try { 4358 if (DBG) log("Removing iface " + iface + " from network " + netId); 4359 mNetd.removeInterfaceFromNetwork(iface, netId); 4360 } catch (Exception e) { 4361 loge("Exception removing interface: " + e); 4362 } 4363 } 4364 } 4365 4366 /** 4367 * Have netd update routes from oldLp to newLp. 4368 * @return true if routes changed between oldLp and newLp 4369 */ 4370 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4371 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4372 if (oldLp != null) { 4373 routeDiff = oldLp.compareAllRoutes(newLp); 4374 } else if (newLp != null) { 4375 routeDiff.added = newLp.getAllRoutes(); 4376 } 4377 4378 // add routes before removing old in case it helps with continuous connectivity 4379 4380 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4381 for (RouteInfo route : routeDiff.added) { 4382 if (route.hasGateway()) continue; 4383 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4384 try { 4385 mNetd.addRoute(netId, route); 4386 } catch (Exception e) { 4387 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4388 loge("Exception in addRoute for non-gateway: " + e); 4389 } 4390 } 4391 } 4392 for (RouteInfo route : routeDiff.added) { 4393 if (route.hasGateway() == false) continue; 4394 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4395 try { 4396 mNetd.addRoute(netId, route); 4397 } catch (Exception e) { 4398 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4399 loge("Exception in addRoute for gateway: " + e); 4400 } 4401 } 4402 } 4403 4404 for (RouteInfo route : routeDiff.removed) { 4405 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4406 try { 4407 mNetd.removeRoute(netId, route); 4408 } catch (Exception e) { 4409 loge("Exception in removeRoute: " + e); 4410 } 4411 } 4412 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4413 } 4414 4415 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4416 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4417 return; // no updating necessary 4418 } 4419 4420 Collection<InetAddress> dnses = newLp.getDnsServers(); 4421 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4422 try { 4423 mNetd.setDnsConfigurationForNetwork( 4424 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4425 } catch (Exception e) { 4426 loge("Exception in setDnsConfigurationForNetwork: " + e); 4427 } 4428 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4429 if (defaultNai != null && defaultNai.network.netId == netId) { 4430 setDefaultDnsSystemProperties(dnses); 4431 } 4432 flushVmDnsCache(); 4433 } 4434 4435 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4436 int last = 0; 4437 for (InetAddress dns : dnses) { 4438 ++last; 4439 String key = "net.dns" + last; 4440 String value = dns.getHostAddress(); 4441 SystemProperties.set(key, value); 4442 } 4443 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4444 String key = "net.dns" + i; 4445 SystemProperties.set(key, ""); 4446 } 4447 mNumDnsEntries = last; 4448 } 4449 4450 /** 4451 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4452 * augmented with any stateful capabilities implied from {@code networkAgent} 4453 * (e.g., validated status and captive portal status). 4454 * 4455 * @param nai the network having its capabilities updated. 4456 * @param networkCapabilities the new network capabilities. 4457 */ 4458 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4459 // Don't modify caller's NetworkCapabilities. 4460 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4461 if (nai.lastValidated) { 4462 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4463 } else { 4464 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4465 } 4466 if (nai.lastCaptivePortalDetected) { 4467 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4468 } else { 4469 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4470 } 4471 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4472 final int oldScore = nai.getCurrentScore(); 4473 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4474 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4475 try { 4476 mNetd.setNetworkPermission(nai.network.netId, 4477 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4478 null : NetworkManagementService.PERMISSION_SYSTEM); 4479 } catch (RemoteException e) { 4480 loge("Exception in setNetworkPermission: " + e); 4481 } 4482 } 4483 synchronized (nai) { 4484 nai.networkCapabilities = networkCapabilities; 4485 } 4486 rematchAllNetworksAndRequests(nai, oldScore); 4487 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4488 } 4489 } 4490 4491 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4492 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4493 NetworkRequest nr = nai.requestAt(i); 4494 // Don't send listening requests to factories. b/17393458 4495 if (nr.isListen()) continue; 4496 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4497 } 4498 } 4499 4500 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4501 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4502 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4503 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4504 networkRequest); 4505 } 4506 } 4507 4508 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4509 int notificationType) { 4510 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4511 Intent intent = new Intent(); 4512 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4513 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4514 nri.mPendingIntentSent = true; 4515 sendIntent(nri.mPendingIntent, intent); 4516 } 4517 // else not handled 4518 } 4519 4520 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4521 mPendingIntentWakeLock.acquire(); 4522 try { 4523 if (DBG) log("Sending " + pendingIntent); 4524 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4525 } catch (PendingIntent.CanceledException e) { 4526 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4527 mPendingIntentWakeLock.release(); 4528 releasePendingNetworkRequest(pendingIntent); 4529 } 4530 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4531 } 4532 4533 @Override 4534 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4535 String resultData, Bundle resultExtras) { 4536 if (DBG) log("Finished sending " + pendingIntent); 4537 mPendingIntentWakeLock.release(); 4538 // Release with a delay so the receiving client has an opportunity to put in its 4539 // own request. 4540 releasePendingNetworkRequestWithDelay(pendingIntent); 4541 } 4542 4543 private void callCallbackForRequest(NetworkRequestInfo nri, 4544 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 4545 if (nri.messenger == null) return; // Default request has no msgr 4546 Bundle bundle = new Bundle(); 4547 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4548 new NetworkRequest(nri.request)); 4549 Message msg = Message.obtain(); 4550 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4551 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4552 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4553 } 4554 switch (notificationType) { 4555 case ConnectivityManager.CALLBACK_LOSING: { 4556 msg.arg1 = arg1; 4557 break; 4558 } 4559 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4560 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4561 new NetworkCapabilities(networkAgent.networkCapabilities)); 4562 break; 4563 } 4564 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4565 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4566 new LinkProperties(networkAgent.linkProperties)); 4567 break; 4568 } 4569 } 4570 msg.what = notificationType; 4571 msg.setData(bundle); 4572 try { 4573 if (VDBG) { 4574 log("sending notification " + notifyTypeToName(notificationType) + 4575 " for " + nri.request); 4576 } 4577 nri.messenger.send(msg); 4578 } catch (RemoteException e) { 4579 // may occur naturally in the race of binder death. 4580 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4581 } 4582 } 4583 4584 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4585 if (nai.numRequestNetworkRequests() != 0) { 4586 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4587 NetworkRequest nr = nai.requestAt(i); 4588 // Ignore listening requests. 4589 if (nr.isListen()) continue; 4590 loge("Dead network still had at least " + nr); 4591 break; 4592 } 4593 } 4594 nai.asyncChannel.disconnect(); 4595 } 4596 4597 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4598 if (oldNetwork == null) { 4599 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4600 return; 4601 } 4602 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4603 4604 // If we get here it means that the last linger timeout for this network expired. So there 4605 // must be no other active linger timers, and we must stop lingering. 4606 oldNetwork.clearLingerState(); 4607 4608 if (unneeded(oldNetwork)) { 4609 teardownUnneededNetwork(oldNetwork); 4610 } 4611 } 4612 4613 private void makeDefault(NetworkAgentInfo newNetwork) { 4614 if (DBG) log("Switching to new default network: " + newNetwork); 4615 setupDataActivityTracking(newNetwork); 4616 try { 4617 mNetd.setDefaultNetId(newNetwork.network.netId); 4618 } catch (Exception e) { 4619 loge("Exception setting default network :" + e); 4620 } 4621 notifyLockdownVpn(newNetwork); 4622 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4623 updateTcpBufferSizes(newNetwork); 4624 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4625 } 4626 4627 // Handles a network appearing or improving its score. 4628 // 4629 // - Evaluates all current NetworkRequests that can be 4630 // satisfied by newNetwork, and reassigns to newNetwork 4631 // any such requests for which newNetwork is the best. 4632 // 4633 // - Lingers any validated Networks that as a result are no longer 4634 // needed. A network is needed if it is the best network for 4635 // one or more NetworkRequests, or if it is a VPN. 4636 // 4637 // - Tears down newNetwork if it just became validated 4638 // but turns out to be unneeded. 4639 // 4640 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4641 // networks that have no chance (i.e. even if validated) 4642 // of becoming the highest scoring network. 4643 // 4644 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4645 // it does not remove NetworkRequests that other Networks could better satisfy. 4646 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4647 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4648 // as it performs better by a factor of the number of Networks. 4649 // 4650 // @param newNetwork is the network to be matched against NetworkRequests. 4651 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4652 // performed to tear down unvalidated networks that have no chance (i.e. even if 4653 // validated) of becoming the highest scoring network. 4654 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4655 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 4656 if (!newNetwork.everConnected) return; 4657 boolean keep = newNetwork.isVPN(); 4658 boolean isNewDefault = false; 4659 NetworkAgentInfo oldDefaultNetwork = null; 4660 if (VDBG) log("rematching " + newNetwork.name()); 4661 // Find and migrate to this Network any NetworkRequests for 4662 // which this network is now the best. 4663 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4664 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4665 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4666 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4667 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4668 final boolean satisfies = newNetwork.satisfies(nri.request); 4669 if (newNetwork == currentNetwork && satisfies) { 4670 if (VDBG) { 4671 log("Network " + newNetwork.name() + " was already satisfying" + 4672 " request " + nri.request.requestId + ". No change."); 4673 } 4674 keep = true; 4675 continue; 4676 } 4677 4678 // check if it satisfies the NetworkCapabilities 4679 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4680 if (satisfies) { 4681 if (nri.request.isListen()) { 4682 // This is not a request, it's a callback listener. 4683 // Add it to newNetwork regardless of score. 4684 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4685 continue; 4686 } 4687 4688 // next check if it's better than any current network we're using for 4689 // this request 4690 if (VDBG) { 4691 log("currentScore = " + 4692 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4693 ", newScore = " + newNetwork.getCurrentScore()); 4694 } 4695 if (currentNetwork == null || 4696 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4697 if (VDBG) log("rematch for " + newNetwork.name()); 4698 if (currentNetwork != null) { 4699 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4700 currentNetwork.removeRequest(nri.request.requestId); 4701 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 4702 if (isDefaultRequest(nri)) { 4703 mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork); 4704 } 4705 affectedNetworks.add(currentNetwork); 4706 } else { 4707 if (VDBG) log(" accepting network in place of null"); 4708 } 4709 newNetwork.unlingerRequest(nri.request); 4710 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4711 if (!newNetwork.addRequest(nri.request)) { 4712 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4713 } 4714 addedRequests.add(nri); 4715 keep = true; 4716 // Tell NetworkFactories about the new score, so they can stop 4717 // trying to connect if they know they cannot match it. 4718 // TODO - this could get expensive if we have alot of requests for this 4719 // network. Think about if there is a way to reduce this. Push 4720 // netid->request mapping to each factory? 4721 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4722 if (isDefaultRequest(nri)) { 4723 isNewDefault = true; 4724 oldDefaultNetwork = currentNetwork; 4725 } 4726 } 4727 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 4728 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4729 // mark it as no longer satisfying "nri". Because networks are processed by 4730 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4731 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4732 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4733 // This means this code doesn't have to handle the case where "currentNetwork" no 4734 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4735 if (DBG) { 4736 log("Network " + newNetwork.name() + " stopped satisfying" + 4737 " request " + nri.request.requestId); 4738 } 4739 newNetwork.removeRequest(nri.request.requestId); 4740 if (currentNetwork == newNetwork) { 4741 mNetworkForRequestId.remove(nri.request.requestId); 4742 sendUpdatedScoreToFactories(nri.request, 0); 4743 } else { 4744 if (nri.request.isRequest()) { 4745 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4746 newNetwork.name() + 4747 " without updating mNetworkForRequestId or factories!"); 4748 } 4749 } 4750 // TODO: technically, sending CALLBACK_LOST here is 4751 // incorrect if nri is a request (not a listen) and there 4752 // is a replacement network currently connected that can 4753 // satisfy it. However, the only capability that can both 4754 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4755 // so this code is only incorrect for a network that loses 4756 // the TRUSTED capability, which is a rare case. 4757 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 4758 } 4759 } 4760 if (isNewDefault) { 4761 // Notify system services that this network is up. 4762 makeDefault(newNetwork); 4763 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 4764 logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); 4765 synchronized (ConnectivityService.this) { 4766 // have a new default network, release the transition wakelock in 4767 // a second if it's held. The second pause is to allow apps 4768 // to reconnect over the new network 4769 if (mNetTransitionWakeLock.isHeld()) { 4770 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4771 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4772 mNetTransitionWakeLockSerialNumber, 0), 4773 1000); 4774 } 4775 } 4776 } 4777 4778 // do this after the default net is switched, but 4779 // before LegacyTypeTracker sends legacy broadcasts 4780 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4781 4782 // Linger any networks that are no longer needed. This should be done after sending the 4783 // available callback for newNetwork. 4784 for (NetworkAgentInfo nai : affectedNetworks) { 4785 updateLingerState(nai, now); 4786 } 4787 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 4788 // does not need to be done in any particular order. 4789 updateLingerState(newNetwork, now); 4790 4791 if (isNewDefault) { 4792 // Maintain the illusion: since the legacy API only 4793 // understands one network at a time, we must pretend 4794 // that the current default network disconnected before 4795 // the new one connected. 4796 if (oldDefaultNetwork != null) { 4797 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4798 oldDefaultNetwork, true); 4799 } 4800 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4801 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4802 notifyLockdownVpn(newNetwork); 4803 } 4804 4805 if (keep) { 4806 // Notify battery stats service about this network, both the normal 4807 // interface and any stacked links. 4808 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4809 try { 4810 final IBatteryStats bs = BatteryStatsService.getService(); 4811 final int type = newNetwork.networkInfo.getType(); 4812 4813 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4814 bs.noteNetworkInterfaceType(baseIface, type); 4815 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4816 final String stackedIface = stacked.getInterfaceName(); 4817 bs.noteNetworkInterfaceType(stackedIface, type); 4818 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4819 } 4820 } catch (RemoteException ignored) { 4821 } 4822 4823 // This has to happen after the notifyNetworkCallbacks as that tickles each 4824 // ConnectivityManager instance so that legacy requests correctly bind dns 4825 // requests to this network. The legacy users are listening for this bcast 4826 // and will generally do a dns request so they can ensureRouteToHost and if 4827 // they do that before the callbacks happen they'll use the default network. 4828 // 4829 // TODO: Is there still a race here? We send the broadcast 4830 // after sending the callback, but if the app can receive the 4831 // broadcast before the callback, it might still break. 4832 // 4833 // This *does* introduce a race where if the user uses the new api 4834 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4835 // they may get old info. Reverse this after the old startUsing api is removed. 4836 // This is on top of the multiple intent sequencing referenced in the todo above. 4837 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 4838 NetworkRequest nr = newNetwork.requestAt(i); 4839 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 4840 // legacy type tracker filters out repeat adds 4841 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4842 } 4843 } 4844 4845 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4846 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4847 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4848 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4849 if (newNetwork.isVPN()) { 4850 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4851 } 4852 } 4853 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4854 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4855 if (unneeded(nai)) { 4856 if (nai.getLingerExpiry() > 0) { 4857 // This network has active linger timers and no requests, but is not 4858 // lingering. Linger it. 4859 // 4860 // One way (the only way?) this can happen if this network is unvalidated 4861 // and became unneeded due to another network improving its score to the 4862 // point where this network will no longer be able to satisfy any requests 4863 // even if it validates. 4864 updateLingerState(nai, now); 4865 } else { 4866 if (DBG) log("Reaping " + nai.name()); 4867 teardownUnneededNetwork(nai); 4868 } 4869 } 4870 } 4871 } 4872 } 4873 4874 /** 4875 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4876 * being disconnected. 4877 * @param changed If only one Network's score or capabilities have been modified since the last 4878 * time this function was called, pass this Network in this argument, otherwise pass 4879 * null. 4880 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4881 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4882 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4883 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4884 * network's score. 4885 */ 4886 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4887 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4888 // to avoid the slowness. It is not simply enough to process just "changed", for 4889 // example in the case where "changed"'s score decreases and another network should begin 4890 // satifying a NetworkRequest that "changed" currently satisfies. 4891 4892 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4893 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4894 // rematchNetworkAndRequests() handles. 4895 final long now = SystemClock.elapsedRealtime(); 4896 if (changed != null && oldScore < changed.getCurrentScore()) { 4897 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 4898 } else { 4899 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4900 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4901 // Rematch higher scoring networks first to prevent requests first matching a lower 4902 // scoring network and then a higher scoring network, which could produce multiple 4903 // callbacks and inadvertently unlinger networks. 4904 Arrays.sort(nais); 4905 for (NetworkAgentInfo nai : nais) { 4906 rematchNetworkAndRequests(nai, 4907 // Only reap the last time through the loop. Reaping before all rematching 4908 // is complete could incorrectly teardown a network that hasn't yet been 4909 // rematched. 4910 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4911 : ReapUnvalidatedNetworks.REAP, 4912 now); 4913 } 4914 } 4915 } 4916 4917 private void updateInetCondition(NetworkAgentInfo nai) { 4918 // Don't bother updating until we've graduated to validated at least once. 4919 if (!nai.everValidated) return; 4920 // For now only update icons for default connection. 4921 // TODO: Update WiFi and cellular icons separately. b/17237507 4922 if (!isDefaultNetwork(nai)) return; 4923 4924 int newInetCondition = nai.lastValidated ? 100 : 0; 4925 // Don't repeat publish. 4926 if (newInetCondition == mDefaultInetConditionPublished) return; 4927 4928 mDefaultInetConditionPublished = newInetCondition; 4929 sendInetConditionBroadcast(nai.networkInfo); 4930 } 4931 4932 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4933 if (mLockdownTracker != null) { 4934 if (nai != null && nai.isVPN()) { 4935 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4936 } else { 4937 mLockdownTracker.onNetworkInfoChanged(); 4938 } 4939 } 4940 } 4941 4942 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4943 NetworkInfo.State state = newInfo.getState(); 4944 NetworkInfo oldInfo = null; 4945 final int oldScore = networkAgent.getCurrentScore(); 4946 synchronized (networkAgent) { 4947 oldInfo = networkAgent.networkInfo; 4948 networkAgent.networkInfo = newInfo; 4949 } 4950 notifyLockdownVpn(networkAgent); 4951 4952 if (oldInfo != null && oldInfo.getState() == state) { 4953 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 4954 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 4955 notifyIfacesChangedForNetworkStats(); 4956 } else if (VDBG) log("ignoring duplicate network state non-change"); 4957 // In either case, no further work should be needed. 4958 return; 4959 } 4960 if (DBG) { 4961 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4962 (oldInfo == null ? "null" : oldInfo.getState()) + 4963 " to " + state); 4964 } 4965 4966 if (!networkAgent.created 4967 && (state == NetworkInfo.State.CONNECTED 4968 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 4969 try { 4970 // This should never fail. Specifying an already in use NetID will cause failure. 4971 if (networkAgent.isVPN()) { 4972 mNetd.createVirtualNetwork(networkAgent.network.netId, 4973 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4974 (networkAgent.networkMisc == null || 4975 !networkAgent.networkMisc.allowBypass)); 4976 } else { 4977 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4978 networkAgent.networkCapabilities.hasCapability( 4979 NET_CAPABILITY_NOT_RESTRICTED) ? 4980 null : NetworkManagementService.PERMISSION_SYSTEM); 4981 } 4982 } catch (Exception e) { 4983 loge("Error creating network " + networkAgent.network.netId + ": " 4984 + e.getMessage()); 4985 return; 4986 } 4987 networkAgent.created = true; 4988 } 4989 4990 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 4991 networkAgent.everConnected = true; 4992 4993 updateLinkProperties(networkAgent, null); 4994 notifyIfacesChangedForNetworkStats(); 4995 4996 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4997 scheduleUnvalidatedPrompt(networkAgent); 4998 4999 if (networkAgent.isVPN()) { 5000 // Temporarily disable the default proxy (not global). 5001 synchronized (mProxyLock) { 5002 if (!mDefaultProxyDisabled) { 5003 mDefaultProxyDisabled = true; 5004 if (mGlobalProxy == null && mDefaultProxy != null) { 5005 sendProxyBroadcast(null); 5006 } 5007 } 5008 } 5009 // TODO: support proxy per network. 5010 } 5011 5012 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5013 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5014 // capabilities, so it only needs to be done once on initial connect, not every time the 5015 // network's capabilities change. Note that we do this before rematching the network, 5016 // so we could decide to tear it down immediately afterwards. That's fine though - on 5017 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5018 // doing. 5019 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5020 5021 // Consider network even though it is not yet validated. 5022 final long now = SystemClock.elapsedRealtime(); 5023 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5024 5025 // This has to happen after matching the requests, because callbacks are just requests. 5026 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5027 } else if (state == NetworkInfo.State.DISCONNECTED) { 5028 networkAgent.asyncChannel.disconnect(); 5029 if (networkAgent.isVPN()) { 5030 synchronized (mProxyLock) { 5031 if (mDefaultProxyDisabled) { 5032 mDefaultProxyDisabled = false; 5033 if (mGlobalProxy == null && mDefaultProxy != null) { 5034 sendProxyBroadcast(mDefaultProxy); 5035 } 5036 } 5037 } 5038 } 5039 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5040 state == NetworkInfo.State.SUSPENDED) { 5041 // going into or coming out of SUSPEND: rescore and notify 5042 if (networkAgent.getCurrentScore() != oldScore) { 5043 rematchAllNetworksAndRequests(networkAgent, oldScore); 5044 } 5045 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5046 ConnectivityManager.CALLBACK_SUSPENDED : 5047 ConnectivityManager.CALLBACK_RESUMED)); 5048 mLegacyTypeTracker.update(networkAgent); 5049 } 5050 } 5051 5052 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5053 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5054 if (score < 0) { 5055 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5056 "). Bumping score to min of 0"); 5057 score = 0; 5058 } 5059 5060 final int oldScore = nai.getCurrentScore(); 5061 nai.setCurrentScore(score); 5062 5063 rematchAllNetworksAndRequests(nai, oldScore); 5064 5065 sendUpdatedScoreToFactories(nai); 5066 } 5067 5068 // notify only this one new request of the current state 5069 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5070 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 5071 if (nri.mPendingIntent == null) { 5072 callCallbackForRequest(nri, nai, notifyType, 0); 5073 } else { 5074 sendPendingIntentForRequest(nri, nai, notifyType); 5075 } 5076 } 5077 5078 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5079 // The NetworkInfo we actually send out has no bearing on the real 5080 // state of affairs. For example, if the default connection is mobile, 5081 // and a request for HIPRI has just gone away, we need to pretend that 5082 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5083 // the state to DISCONNECTED, even though the network is of type MOBILE 5084 // and is still connected. 5085 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5086 info.setType(type); 5087 if (state != DetailedState.DISCONNECTED) { 5088 info.setDetailedState(state, null, info.getExtraInfo()); 5089 sendConnectedBroadcast(info); 5090 } else { 5091 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5092 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5093 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5094 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5095 if (info.isFailover()) { 5096 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5097 nai.networkInfo.setFailover(false); 5098 } 5099 if (info.getReason() != null) { 5100 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5101 } 5102 if (info.getExtraInfo() != null) { 5103 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5104 } 5105 NetworkAgentInfo newDefaultAgent = null; 5106 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5107 newDefaultAgent = getDefaultNetwork(); 5108 if (newDefaultAgent != null) { 5109 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5110 newDefaultAgent.networkInfo); 5111 } else { 5112 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5113 } 5114 } 5115 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5116 mDefaultInetConditionPublished); 5117 sendStickyBroadcast(intent); 5118 if (newDefaultAgent != null) { 5119 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5120 } 5121 } 5122 } 5123 5124 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5125 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5126 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5127 NetworkRequest nr = networkAgent.requestAt(i); 5128 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5129 if (VDBG) log(" sending notification for " + nr); 5130 if (nri.mPendingIntent == null) { 5131 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5132 } else { 5133 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5134 } 5135 } 5136 } 5137 5138 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5139 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5140 } 5141 5142 private String notifyTypeToName(int notifyType) { 5143 switch (notifyType) { 5144 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5145 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5146 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5147 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5148 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5149 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5150 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5151 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5152 } 5153 return "UNKNOWN"; 5154 } 5155 5156 /** 5157 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5158 * properties tracked by NetworkStatsService on an active iface has changed. 5159 */ 5160 private void notifyIfacesChangedForNetworkStats() { 5161 try { 5162 mStatsService.forceUpdateIfaces(); 5163 } catch (Exception ignored) { 5164 } 5165 } 5166 5167 @Override 5168 public boolean addVpnAddress(String address, int prefixLength) { 5169 throwIfLockdownEnabled(); 5170 int user = UserHandle.getUserId(Binder.getCallingUid()); 5171 synchronized (mVpns) { 5172 return mVpns.get(user).addAddress(address, prefixLength); 5173 } 5174 } 5175 5176 @Override 5177 public boolean removeVpnAddress(String address, int prefixLength) { 5178 throwIfLockdownEnabled(); 5179 int user = UserHandle.getUserId(Binder.getCallingUid()); 5180 synchronized (mVpns) { 5181 return mVpns.get(user).removeAddress(address, prefixLength); 5182 } 5183 } 5184 5185 @Override 5186 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5187 throwIfLockdownEnabled(); 5188 int user = UserHandle.getUserId(Binder.getCallingUid()); 5189 boolean success; 5190 synchronized (mVpns) { 5191 success = mVpns.get(user).setUnderlyingNetworks(networks); 5192 } 5193 if (success) { 5194 notifyIfacesChangedForNetworkStats(); 5195 } 5196 return success; 5197 } 5198 5199 @Override 5200 public String getCaptivePortalServerUrl() { 5201 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5202 } 5203 5204 @Override 5205 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5206 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5207 enforceKeepalivePermission(); 5208 mKeepaliveTracker.startNattKeepalive( 5209 getNetworkAgentInfoForNetwork(network), 5210 intervalSeconds, messenger, binder, 5211 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5212 } 5213 5214 @Override 5215 public void stopKeepalive(Network network, int slot) { 5216 mHandler.sendMessage(mHandler.obtainMessage( 5217 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5218 } 5219 5220 @Override 5221 public void factoryReset() { 5222 enforceConnectivityInternalPermission(); 5223 5224 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5225 return; 5226 } 5227 5228 final int userId = UserHandle.getCallingUserId(); 5229 5230 // Turn airplane mode off 5231 setAirplaneMode(false); 5232 5233 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5234 // Untether 5235 for (String tether : getTetheredIfaces()) { 5236 untether(tether); 5237 } 5238 } 5239 5240 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5241 // Remove always-on package 5242 synchronized (mVpns) { 5243 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5244 if (alwaysOnPackage != null) { 5245 setAlwaysOnVpnPackage(userId, null, false); 5246 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5247 } 5248 } 5249 5250 // Turn VPN off 5251 VpnConfig vpnConfig = getVpnConfig(userId); 5252 if (vpnConfig != null) { 5253 if (vpnConfig.legacy) { 5254 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5255 } else { 5256 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5257 // in the future without user intervention. 5258 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5259 5260 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5261 } 5262 } 5263 } 5264 } 5265 5266 @VisibleForTesting 5267 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5268 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5269 return new NetworkMonitor(context, handler, nai, defaultRequest); 5270 } 5271 5272 @VisibleForTesting 5273 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5274 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5275 } 5276 5277 private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5278 int newNetid = NETID_UNSET; 5279 int prevNetid = NETID_UNSET; 5280 int[] transports = new int[0]; 5281 boolean hadIPv4 = false; 5282 boolean hadIPv6 = false; 5283 5284 if (newNai != null) { 5285 newNetid = newNai.network.netId; 5286 transports = newNai.networkCapabilities.getTransportTypes(); 5287 } 5288 if (prevNai != null) { 5289 prevNetid = prevNai.network.netId; 5290 final LinkProperties lp = prevNai.linkProperties; 5291 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5292 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5293 } 5294 5295 mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); 5296 } 5297 5298 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5299 mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); 5300 } 5301} 5302