ConnectivityService.java revision f15b2824b6f954e3a8b039a0836530f571d663d0
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)); 841 842 final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(), 843 Settings.Global.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT, 844 LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT); 845 final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(), 846 Settings.Global.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS, 847 LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS); 848 mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit); 849 } 850 851 private NetworkRequest createInternetRequestForTransport(int transportType) { 852 NetworkCapabilities netCap = new NetworkCapabilities(); 853 netCap.addCapability(NET_CAPABILITY_INTERNET); 854 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 855 if (transportType > -1) { 856 netCap.addTransportType(transportType); 857 } 858 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), 859 NetworkRequest.Type.REQUEST); 860 } 861 862 // Used only for testing. 863 // TODO: Delete this and either: 864 // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires 865 // changing ContentResolver to make registerContentObserver non-final). 866 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 867 // by subclassing SettingsObserver. 868 @VisibleForTesting 869 void updateMobileDataAlwaysOn() { 870 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 871 } 872 873 private void handleMobileDataAlwaysOn() { 874 final boolean enable = (Settings.Global.getInt( 875 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 876 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 877 if (enable == isEnabled) { 878 return; // Nothing to do. 879 } 880 881 if (enable) { 882 handleRegisterNetworkRequest(new NetworkRequestInfo( 883 null, mDefaultMobileDataRequest, new Binder())); 884 } else { 885 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 886 } 887 } 888 889 private void registerSettingsCallbacks() { 890 // Watch for global HTTP proxy changes. 891 mSettingsObserver.observe( 892 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 893 EVENT_APPLY_GLOBAL_HTTP_PROXY); 894 895 // Watch for whether or not to keep mobile data always on. 896 mSettingsObserver.observe( 897 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 898 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 899 } 900 901 private synchronized int nextNetworkRequestId() { 902 return mNextNetworkRequestId++; 903 } 904 905 @VisibleForTesting 906 protected int reserveNetId() { 907 synchronized (mNetworkForNetId) { 908 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 909 int netId = mNextNetId; 910 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 911 // Make sure NetID unused. http://b/16815182 912 if (!mNetIdInUse.get(netId)) { 913 mNetIdInUse.put(netId, true); 914 return netId; 915 } 916 } 917 } 918 throw new IllegalStateException("No free netIds"); 919 } 920 921 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 922 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 923 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 924 final NetworkState state; 925 if (nai != null) { 926 state = nai.getNetworkState(); 927 state.networkInfo.setType(networkType); 928 } else { 929 final NetworkInfo info = new NetworkInfo(networkType, 0, 930 getNetworkTypeName(networkType), ""); 931 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 932 info.setIsAvailable(true); 933 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 934 null, null, null); 935 } 936 filterNetworkStateForUid(state, uid, ignoreBlocked); 937 return state; 938 } else { 939 return NetworkState.EMPTY; 940 } 941 } 942 943 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 944 if (network == null) { 945 return null; 946 } 947 synchronized (mNetworkForNetId) { 948 return mNetworkForNetId.get(network.netId); 949 } 950 } 951 952 private Network[] getVpnUnderlyingNetworks(int uid) { 953 if (!mLockdownEnabled) { 954 int user = UserHandle.getUserId(uid); 955 synchronized (mVpns) { 956 Vpn vpn = mVpns.get(user); 957 if (vpn != null && vpn.appliesToUid(uid)) { 958 return vpn.getUnderlyingNetworks(); 959 } 960 } 961 } 962 return null; 963 } 964 965 private NetworkState getUnfilteredActiveNetworkState(int uid) { 966 NetworkAgentInfo nai = getDefaultNetwork(); 967 968 final Network[] networks = getVpnUnderlyingNetworks(uid); 969 if (networks != null) { 970 // getUnderlyingNetworks() returns: 971 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 972 // empty array => the VPN explicitly said "no default network". 973 // non-empty array => the VPN specified one or more default networks; we use the 974 // first one. 975 if (networks.length > 0) { 976 nai = getNetworkAgentInfoForNetwork(networks[0]); 977 } else { 978 nai = null; 979 } 980 } 981 982 if (nai != null) { 983 return nai.getNetworkState(); 984 } else { 985 return NetworkState.EMPTY; 986 } 987 } 988 989 /** 990 * Check if UID should be blocked from using the network with the given LinkProperties. 991 */ 992 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 993 boolean ignoreBlocked) { 994 // Networks aren't blocked when ignoring blocked status 995 if (ignoreBlocked) return false; 996 // Networks are never blocked for system services 997 if (isSystem(uid)) return false; 998 999 final boolean networkMetered; 1000 final int uidRules; 1001 1002 synchronized (mVpns) { 1003 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 1004 if (vpn != null && vpn.isBlockingUid(uid)) { 1005 return true; 1006 } 1007 } 1008 1009 final String iface = (lp == null ? "" : lp.getInterfaceName()); 1010 synchronized (mRulesLock) { 1011 networkMetered = mMeteredIfaces.contains(iface); 1012 uidRules = mUidRules.get(uid, RULE_NONE); 1013 } 1014 1015 boolean allowed = true; 1016 // Check Data Saver Mode first... 1017 if (networkMetered) { 1018 if ((uidRules & RULE_REJECT_METERED) != 0) { 1019 if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); 1020 // Explicitly blacklisted. 1021 allowed = false; 1022 } else { 1023 allowed = !mRestrictBackground 1024 || (uidRules & RULE_ALLOW_METERED) != 0 1025 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; 1026 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1027 + " mRestrictBackground=" + mRestrictBackground 1028 + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) 1029 + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" 1030 + ": " + allowed); 1031 } 1032 } 1033 // ...then power restrictions. 1034 if (allowed) { 1035 allowed = (uidRules & RULE_REJECT_ALL) == 0; 1036 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1037 + " rule is " + uidRulesToString(uidRules) + ": " + allowed); 1038 } 1039 return !allowed; 1040 } 1041 1042 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1043 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1044 return; 1045 } 1046 boolean removed = false; 1047 boolean added = false; 1048 synchronized (mBlockedAppUids) { 1049 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1050 added = true; 1051 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1052 removed = true; 1053 } 1054 } 1055 if (added) { 1056 log("Returning blocked NetworkInfo to uid=" + uid); 1057 mNetworkInfoBlockingLogs.log("BLOCKED " + uid); 1058 } else if (removed) { 1059 log("Returning unblocked NetworkInfo to uid=" + uid); 1060 mNetworkInfoBlockingLogs.log("UNBLOCKED " + uid); 1061 } 1062 } 1063 1064 /** 1065 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1066 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1067 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 1068 * {@link NetworkInfo#isMetered()} based on network policies. 1069 */ 1070 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1071 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1072 1073 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1074 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1075 } 1076 if (mLockdownTracker != null) { 1077 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1078 } 1079 1080 // TODO: apply metered state closer to NetworkAgentInfo 1081 final long token = Binder.clearCallingIdentity(); 1082 try { 1083 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 1084 } catch (RemoteException e) { 1085 } finally { 1086 Binder.restoreCallingIdentity(token); 1087 } 1088 } 1089 1090 /** 1091 * Return NetworkInfo for the active (i.e., connected) network interface. 1092 * It is assumed that at most one network is active at a time. If more 1093 * than one is active, it is indeterminate which will be returned. 1094 * @return the info for the active network, or {@code null} if none is 1095 * active 1096 */ 1097 @Override 1098 public NetworkInfo getActiveNetworkInfo() { 1099 enforceAccessPermission(); 1100 final int uid = Binder.getCallingUid(); 1101 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1102 filterNetworkStateForUid(state, uid, false); 1103 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1104 return state.networkInfo; 1105 } 1106 1107 @Override 1108 public Network getActiveNetwork() { 1109 enforceAccessPermission(); 1110 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1111 } 1112 1113 @Override 1114 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1115 enforceConnectivityInternalPermission(); 1116 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1117 } 1118 1119 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1120 final int user = UserHandle.getUserId(uid); 1121 int vpnNetId = NETID_UNSET; 1122 synchronized (mVpns) { 1123 final Vpn vpn = mVpns.get(user); 1124 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1125 } 1126 NetworkAgentInfo nai; 1127 if (vpnNetId != NETID_UNSET) { 1128 synchronized (mNetworkForNetId) { 1129 nai = mNetworkForNetId.get(vpnNetId); 1130 } 1131 if (nai != null) return nai.network; 1132 } 1133 nai = getDefaultNetwork(); 1134 if (nai != null 1135 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1136 nai = null; 1137 } 1138 return nai != null ? nai.network : null; 1139 } 1140 1141 // Public because it's used by mLockdownTracker. 1142 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1143 enforceAccessPermission(); 1144 final int uid = Binder.getCallingUid(); 1145 NetworkState state = getUnfilteredActiveNetworkState(uid); 1146 return state.networkInfo; 1147 } 1148 1149 @Override 1150 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1151 enforceConnectivityInternalPermission(); 1152 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1153 filterNetworkStateForUid(state, uid, ignoreBlocked); 1154 return state.networkInfo; 1155 } 1156 1157 @Override 1158 public NetworkInfo getNetworkInfo(int networkType) { 1159 enforceAccessPermission(); 1160 final int uid = Binder.getCallingUid(); 1161 if (getVpnUnderlyingNetworks(uid) != null) { 1162 // A VPN is active, so we may need to return one of its underlying networks. This 1163 // information is not available in LegacyTypeTracker, so we have to get it from 1164 // getUnfilteredActiveNetworkState. 1165 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1166 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1167 filterNetworkStateForUid(state, uid, false); 1168 return state.networkInfo; 1169 } 1170 } 1171 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1172 return state.networkInfo; 1173 } 1174 1175 @Override 1176 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1177 enforceAccessPermission(); 1178 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1179 if (nai != null) { 1180 final NetworkState state = nai.getNetworkState(); 1181 filterNetworkStateForUid(state, uid, ignoreBlocked); 1182 return state.networkInfo; 1183 } else { 1184 return null; 1185 } 1186 } 1187 1188 @Override 1189 public NetworkInfo[] getAllNetworkInfo() { 1190 enforceAccessPermission(); 1191 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1192 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1193 networkType++) { 1194 NetworkInfo info = getNetworkInfo(networkType); 1195 if (info != null) { 1196 result.add(info); 1197 } 1198 } 1199 return result.toArray(new NetworkInfo[result.size()]); 1200 } 1201 1202 @Override 1203 public Network getNetworkForType(int networkType) { 1204 enforceAccessPermission(); 1205 final int uid = Binder.getCallingUid(); 1206 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1207 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1208 return state.network; 1209 } 1210 return null; 1211 } 1212 1213 @Override 1214 public Network[] getAllNetworks() { 1215 enforceAccessPermission(); 1216 synchronized (mNetworkForNetId) { 1217 final Network[] result = new Network[mNetworkForNetId.size()]; 1218 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1219 result[i] = mNetworkForNetId.valueAt(i).network; 1220 } 1221 return result; 1222 } 1223 } 1224 1225 @Override 1226 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1227 // The basic principle is: if an app's traffic could possibly go over a 1228 // network, without the app doing anything multinetwork-specific, 1229 // (hence, by "default"), then include that network's capabilities in 1230 // the array. 1231 // 1232 // In the normal case, app traffic only goes over the system's default 1233 // network connection, so that's the only network returned. 1234 // 1235 // With a VPN in force, some app traffic may go into the VPN, and thus 1236 // over whatever underlying networks the VPN specifies, while other app 1237 // traffic may go over the system default network (e.g.: a split-tunnel 1238 // VPN, or an app disallowed by the VPN), so the set of networks 1239 // returned includes the VPN's underlying networks and the system 1240 // default. 1241 enforceAccessPermission(); 1242 1243 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1244 1245 NetworkAgentInfo nai = getDefaultNetwork(); 1246 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1247 if (nc != null) { 1248 result.put(nai.network, nc); 1249 } 1250 1251 if (!mLockdownEnabled) { 1252 synchronized (mVpns) { 1253 Vpn vpn = mVpns.get(userId); 1254 if (vpn != null) { 1255 Network[] networks = vpn.getUnderlyingNetworks(); 1256 if (networks != null) { 1257 for (Network network : networks) { 1258 nai = getNetworkAgentInfoForNetwork(network); 1259 nc = getNetworkCapabilitiesInternal(nai); 1260 if (nc != null) { 1261 result.put(network, nc); 1262 } 1263 } 1264 } 1265 } 1266 } 1267 } 1268 1269 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1270 out = result.values().toArray(out); 1271 return out; 1272 } 1273 1274 @Override 1275 public boolean isNetworkSupported(int networkType) { 1276 enforceAccessPermission(); 1277 return mLegacyTypeTracker.isTypeSupported(networkType); 1278 } 1279 1280 /** 1281 * Return LinkProperties for the active (i.e., connected) default 1282 * network interface. It is assumed that at most one default network 1283 * is active at a time. If more than one is active, it is indeterminate 1284 * which will be returned. 1285 * @return the ip properties for the active network, or {@code null} if 1286 * none is active 1287 */ 1288 @Override 1289 public LinkProperties getActiveLinkProperties() { 1290 enforceAccessPermission(); 1291 final int uid = Binder.getCallingUid(); 1292 NetworkState state = getUnfilteredActiveNetworkState(uid); 1293 return state.linkProperties; 1294 } 1295 1296 @Override 1297 public LinkProperties getLinkPropertiesForType(int networkType) { 1298 enforceAccessPermission(); 1299 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1300 if (nai != null) { 1301 synchronized (nai) { 1302 return new LinkProperties(nai.linkProperties); 1303 } 1304 } 1305 return null; 1306 } 1307 1308 // TODO - this should be ALL networks 1309 @Override 1310 public LinkProperties getLinkProperties(Network network) { 1311 enforceAccessPermission(); 1312 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1313 if (nai != null) { 1314 synchronized (nai) { 1315 return new LinkProperties(nai.linkProperties); 1316 } 1317 } 1318 return null; 1319 } 1320 1321 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1322 if (nai != null) { 1323 synchronized (nai) { 1324 if (nai.networkCapabilities != null) { 1325 return new NetworkCapabilities(nai.networkCapabilities); 1326 } 1327 } 1328 } 1329 return null; 1330 } 1331 1332 @Override 1333 public NetworkCapabilities getNetworkCapabilities(Network network) { 1334 enforceAccessPermission(); 1335 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1336 } 1337 1338 @Override 1339 public NetworkState[] getAllNetworkState() { 1340 // Require internal since we're handing out IMSI details 1341 enforceConnectivityInternalPermission(); 1342 1343 final ArrayList<NetworkState> result = Lists.newArrayList(); 1344 for (Network network : getAllNetworks()) { 1345 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1346 if (nai != null) { 1347 result.add(nai.getNetworkState()); 1348 } 1349 } 1350 return result.toArray(new NetworkState[result.size()]); 1351 } 1352 1353 @Override 1354 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1355 enforceAccessPermission(); 1356 final int uid = Binder.getCallingUid(); 1357 final long token = Binder.clearCallingIdentity(); 1358 try { 1359 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1360 if (state.networkInfo != null) { 1361 try { 1362 return mPolicyManager.getNetworkQuotaInfo(state); 1363 } catch (RemoteException e) { 1364 } 1365 } 1366 return null; 1367 } finally { 1368 Binder.restoreCallingIdentity(token); 1369 } 1370 } 1371 1372 @Override 1373 public boolean isActiveNetworkMetered() { 1374 enforceAccessPermission(); 1375 1376 final NetworkInfo info = getActiveNetworkInfo(); 1377 return (info != null) ? info.isMetered() : false; 1378 } 1379 1380 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1381 @Override 1382 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1383 int deviceType = Integer.parseInt(label); 1384 sendDataActivityBroadcast(deviceType, active, tsNanos); 1385 } 1386 }; 1387 1388 /** 1389 * Ensure that a network route exists to deliver traffic to the specified 1390 * host via the specified network interface. 1391 * @param networkType the type of the network over which traffic to the 1392 * specified host is to be routed 1393 * @param hostAddress the IP address of the host to which the route is 1394 * desired 1395 * @return {@code true} on success, {@code false} on failure 1396 */ 1397 @Override 1398 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1399 enforceChangePermission(); 1400 if (mProtectedNetworks.contains(networkType)) { 1401 enforceConnectivityInternalPermission(); 1402 } 1403 1404 InetAddress addr; 1405 try { 1406 addr = InetAddress.getByAddress(hostAddress); 1407 } catch (UnknownHostException e) { 1408 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1409 return false; 1410 } 1411 1412 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1413 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1414 return false; 1415 } 1416 1417 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1418 if (nai == null) { 1419 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1420 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1421 } else { 1422 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1423 } 1424 return false; 1425 } 1426 1427 DetailedState netState; 1428 synchronized (nai) { 1429 netState = nai.networkInfo.getDetailedState(); 1430 } 1431 1432 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1433 if (VDBG) { 1434 log("requestRouteToHostAddress on down network " 1435 + "(" + networkType + ") - dropped" 1436 + " netState=" + netState); 1437 } 1438 return false; 1439 } 1440 1441 final int uid = Binder.getCallingUid(); 1442 final long token = Binder.clearCallingIdentity(); 1443 try { 1444 LinkProperties lp; 1445 int netId; 1446 synchronized (nai) { 1447 lp = nai.linkProperties; 1448 netId = nai.network.netId; 1449 } 1450 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1451 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1452 return ok; 1453 } finally { 1454 Binder.restoreCallingIdentity(token); 1455 } 1456 } 1457 1458 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1459 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1460 if (bestRoute == null) { 1461 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1462 } else { 1463 String iface = bestRoute.getInterface(); 1464 if (bestRoute.getGateway().equals(addr)) { 1465 // if there is no better route, add the implied hostroute for our gateway 1466 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1467 } else { 1468 // if we will connect to this through another route, add a direct route 1469 // to it's gateway 1470 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1471 } 1472 } 1473 if (DBG) log("Adding legacy route " + bestRoute + 1474 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1475 try { 1476 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1477 } catch (Exception e) { 1478 // never crash - catch them all 1479 if (DBG) loge("Exception trying to add a route: " + e); 1480 return false; 1481 } 1482 return true; 1483 } 1484 1485 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1486 @Override 1487 public void onUidRulesChanged(int uid, int uidRules) { 1488 // caller is NPMS, since we only register with them 1489 if (LOGD_RULES) { 1490 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1491 } 1492 1493 synchronized (mRulesLock) { 1494 // skip update when we've already applied rules 1495 final int oldRules = mUidRules.get(uid, RULE_NONE); 1496 if (oldRules == uidRules) return; 1497 1498 if (uidRules == RULE_NONE) { 1499 mUidRules.delete(uid); 1500 } else { 1501 mUidRules.put(uid, uidRules); 1502 } 1503 } 1504 1505 // TODO: notify UID when it has requested targeted updates 1506 } 1507 1508 @Override 1509 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1510 // caller is NPMS, since we only register with them 1511 if (LOGD_RULES) { 1512 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1513 } 1514 1515 synchronized (mRulesLock) { 1516 mMeteredIfaces.clear(); 1517 for (String iface : meteredIfaces) { 1518 mMeteredIfaces.add(iface); 1519 } 1520 } 1521 } 1522 1523 @Override 1524 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1525 // caller is NPMS, since we only register with them 1526 if (LOGD_RULES) { 1527 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1528 } 1529 1530 synchronized (mRulesLock) { 1531 mRestrictBackground = restrictBackground; 1532 } 1533 1534 if (restrictBackground) { 1535 log("onRestrictBackgroundChanged(true): disabling tethering"); 1536 mTethering.untetherAll(); 1537 } 1538 } 1539 1540 @Override 1541 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1542 if (LOGD_RULES) { 1543 // caller is NPMS, since we only register with them 1544 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1545 + whitelisted + ")"); 1546 } 1547 } 1548 @Override 1549 public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { 1550 if (LOGD_RULES) { 1551 // caller is NPMS, since we only register with them 1552 log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" 1553 + blacklisted + ")"); 1554 } 1555 } 1556 }; 1557 1558 /** 1559 * Require that the caller is either in the same user or has appropriate permission to interact 1560 * across users. 1561 * 1562 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1563 */ 1564 private void enforceCrossUserPermission(int userId) { 1565 if (userId == UserHandle.getCallingUserId()) { 1566 // Not a cross-user call. 1567 return; 1568 } 1569 mContext.enforceCallingOrSelfPermission( 1570 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1571 "ConnectivityService"); 1572 } 1573 1574 private void enforceInternetPermission() { 1575 mContext.enforceCallingOrSelfPermission( 1576 android.Manifest.permission.INTERNET, 1577 "ConnectivityService"); 1578 } 1579 1580 private void enforceAccessPermission() { 1581 mContext.enforceCallingOrSelfPermission( 1582 android.Manifest.permission.ACCESS_NETWORK_STATE, 1583 "ConnectivityService"); 1584 } 1585 1586 private void enforceChangePermission() { 1587 ConnectivityManager.enforceChangePermission(mContext); 1588 } 1589 1590 private void enforceTetherAccessPermission() { 1591 mContext.enforceCallingOrSelfPermission( 1592 android.Manifest.permission.ACCESS_NETWORK_STATE, 1593 "ConnectivityService"); 1594 } 1595 1596 private void enforceConnectivityInternalPermission() { 1597 mContext.enforceCallingOrSelfPermission( 1598 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1599 "ConnectivityService"); 1600 } 1601 1602 private void enforceConnectivityRestrictedNetworksPermission() { 1603 try { 1604 mContext.enforceCallingOrSelfPermission( 1605 android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, 1606 "ConnectivityService"); 1607 return; 1608 } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } 1609 enforceConnectivityInternalPermission(); 1610 } 1611 1612 private void enforceKeepalivePermission() { 1613 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1614 } 1615 1616 // Public because it's used by mLockdownTracker. 1617 public void sendConnectedBroadcast(NetworkInfo info) { 1618 enforceConnectivityInternalPermission(); 1619 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1620 } 1621 1622 private void sendInetConditionBroadcast(NetworkInfo info) { 1623 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1624 } 1625 1626 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1627 if (mLockdownTracker != null) { 1628 info = new NetworkInfo(info); 1629 mLockdownTracker.augmentNetworkInfo(info); 1630 } 1631 1632 Intent intent = new Intent(bcastType); 1633 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1634 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1635 if (info.isFailover()) { 1636 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1637 info.setFailover(false); 1638 } 1639 if (info.getReason() != null) { 1640 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1641 } 1642 if (info.getExtraInfo() != null) { 1643 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1644 info.getExtraInfo()); 1645 } 1646 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1647 return intent; 1648 } 1649 1650 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1651 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1652 } 1653 1654 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1655 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1656 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1657 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1658 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1659 final long ident = Binder.clearCallingIdentity(); 1660 try { 1661 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1662 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1663 } finally { 1664 Binder.restoreCallingIdentity(ident); 1665 } 1666 } 1667 1668 private void sendStickyBroadcast(Intent intent) { 1669 synchronized(this) { 1670 if (!mSystemReady) { 1671 mInitialBroadcast = new Intent(intent); 1672 } 1673 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1674 if (VDBG) { 1675 log("sendStickyBroadcast: action=" + intent.getAction()); 1676 } 1677 1678 Bundle options = null; 1679 final long ident = Binder.clearCallingIdentity(); 1680 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1681 final NetworkInfo ni = intent.getParcelableExtra( 1682 ConnectivityManager.EXTRA_NETWORK_INFO); 1683 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1684 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1685 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1686 } else { 1687 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1688 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1689 options = opts.toBundle(); 1690 } 1691 final IBatteryStats bs = BatteryStatsService.getService(); 1692 try { 1693 bs.noteConnectivityChanged(intent.getIntExtra( 1694 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1695 ni != null ? ni.getState().toString() : "?"); 1696 } catch (RemoteException e) { 1697 } 1698 } 1699 try { 1700 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1701 } finally { 1702 Binder.restoreCallingIdentity(ident); 1703 } 1704 } 1705 } 1706 1707 void systemReady() { 1708 loadGlobalProxy(); 1709 1710 synchronized(this) { 1711 mSystemReady = true; 1712 if (mInitialBroadcast != null) { 1713 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1714 mInitialBroadcast = null; 1715 } 1716 } 1717 // load the global proxy at startup 1718 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1719 1720 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1721 // for user to unlock device too. 1722 updateLockdownVpn(); 1723 1724 // Configure whether mobile data is always on. 1725 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1726 1727 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1728 1729 mPermissionMonitor.startMonitoring(); 1730 } 1731 1732 /** 1733 * Setup data activity tracking for the given network. 1734 * 1735 * Every {@code setupDataActivityTracking} should be paired with a 1736 * {@link #removeDataActivityTracking} for cleanup. 1737 */ 1738 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1739 final String iface = networkAgent.linkProperties.getInterfaceName(); 1740 1741 final int timeout; 1742 int type = ConnectivityManager.TYPE_NONE; 1743 1744 if (networkAgent.networkCapabilities.hasTransport( 1745 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1746 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1747 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1748 10); 1749 type = ConnectivityManager.TYPE_MOBILE; 1750 } else if (networkAgent.networkCapabilities.hasTransport( 1751 NetworkCapabilities.TRANSPORT_WIFI)) { 1752 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1753 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1754 15); 1755 type = ConnectivityManager.TYPE_WIFI; 1756 } else { 1757 // do not track any other networks 1758 timeout = 0; 1759 } 1760 1761 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1762 try { 1763 mNetd.addIdleTimer(iface, timeout, type); 1764 } catch (Exception e) { 1765 // You shall not crash! 1766 loge("Exception in setupDataActivityTracking " + e); 1767 } 1768 } 1769 } 1770 1771 /** 1772 * Remove data activity tracking when network disconnects. 1773 */ 1774 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1775 final String iface = networkAgent.linkProperties.getInterfaceName(); 1776 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1777 1778 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1779 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1780 try { 1781 // the call fails silently if no idletimer setup for this interface 1782 mNetd.removeIdleTimer(iface); 1783 } catch (Exception e) { 1784 loge("Exception in removeDataActivityTracking " + e); 1785 } 1786 } 1787 } 1788 1789 /** 1790 * Reads the network specific MTU size from reources. 1791 * and set it on it's iface. 1792 */ 1793 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1794 final String iface = newLp.getInterfaceName(); 1795 final int mtu = newLp.getMtu(); 1796 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1797 if (VDBG) log("identical MTU - not setting"); 1798 return; 1799 } 1800 1801 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1802 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1803 return; 1804 } 1805 1806 // Cannot set MTU without interface name 1807 if (TextUtils.isEmpty(iface)) { 1808 loge("Setting MTU size with null iface."); 1809 return; 1810 } 1811 1812 try { 1813 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1814 mNetd.setMtu(iface, mtu); 1815 } catch (Exception e) { 1816 Slog.e(TAG, "exception in setMtu()" + e); 1817 } 1818 } 1819 1820 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1821 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1822 1823 // Overridden for testing purposes to avoid writing to SystemProperties. 1824 @VisibleForTesting 1825 protected int getDefaultTcpRwnd() { 1826 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1827 } 1828 1829 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1830 if (isDefaultNetwork(nai) == false) { 1831 return; 1832 } 1833 1834 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1835 String[] values = null; 1836 if (tcpBufferSizes != null) { 1837 values = tcpBufferSizes.split(","); 1838 } 1839 1840 if (values == null || values.length != 6) { 1841 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1842 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1843 values = tcpBufferSizes.split(","); 1844 } 1845 1846 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1847 1848 try { 1849 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1850 1851 final String prefix = "/sys/kernel/ipv4/tcp_"; 1852 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1853 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1854 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1855 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1856 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1857 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1858 mCurrentTcpBufferSizes = tcpBufferSizes; 1859 } catch (IOException e) { 1860 loge("Can't set TCP buffer sizes:" + e); 1861 } 1862 1863 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1864 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1865 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1866 if (rwndValue != 0) { 1867 SystemProperties.set(sysctlKey, rwndValue.toString()); 1868 } 1869 } 1870 1871 private void flushVmDnsCache() { 1872 /* 1873 * Tell the VMs to toss their DNS caches 1874 */ 1875 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1876 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1877 /* 1878 * Connectivity events can happen before boot has completed ... 1879 */ 1880 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1881 final long ident = Binder.clearCallingIdentity(); 1882 try { 1883 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1884 } finally { 1885 Binder.restoreCallingIdentity(ident); 1886 } 1887 } 1888 1889 @Override 1890 public int getRestoreDefaultNetworkDelay(int networkType) { 1891 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1892 NETWORK_RESTORE_DELAY_PROP_NAME); 1893 if(restoreDefaultNetworkDelayStr != null && 1894 restoreDefaultNetworkDelayStr.length() != 0) { 1895 try { 1896 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1897 } catch (NumberFormatException e) { 1898 } 1899 } 1900 // if the system property isn't set, use the value for the apn type 1901 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1902 1903 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1904 (mNetConfigs[networkType] != null)) { 1905 ret = mNetConfigs[networkType].restoreTime; 1906 } 1907 return ret; 1908 } 1909 1910 private boolean argsContain(String[] args, String target) { 1911 for (String arg : args) { 1912 if (arg.equals(target)) return true; 1913 } 1914 return false; 1915 } 1916 1917 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1918 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1919 final long DIAG_TIME_MS = 5000; 1920 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1921 // Start gathering diagnostic information. 1922 netDiags.add(new NetworkDiagnostics( 1923 nai.network, 1924 new LinkProperties(nai.linkProperties), // Must be a copy. 1925 DIAG_TIME_MS)); 1926 } 1927 1928 for (NetworkDiagnostics netDiag : netDiags) { 1929 pw.println(); 1930 netDiag.waitForMeasurements(); 1931 netDiag.dump(pw); 1932 } 1933 } 1934 1935 @Override 1936 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1937 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1938 if (mContext.checkCallingOrSelfPermission( 1939 android.Manifest.permission.DUMP) 1940 != PackageManager.PERMISSION_GRANTED) { 1941 pw.println("Permission Denial: can't dump ConnectivityService " + 1942 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1943 Binder.getCallingUid()); 1944 return; 1945 } 1946 1947 if (argsContain(args, "--diag")) { 1948 dumpNetworkDiagnostics(pw); 1949 return; 1950 } 1951 1952 pw.print("NetworkFactories for:"); 1953 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1954 pw.print(" " + nfi.name); 1955 } 1956 pw.println(); 1957 pw.println(); 1958 1959 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1960 pw.print("Active default network: "); 1961 if (defaultNai == null) { 1962 pw.println("none"); 1963 } else { 1964 pw.println(defaultNai.network.netId); 1965 } 1966 pw.println(); 1967 1968 pw.println("Current Networks:"); 1969 pw.increaseIndent(); 1970 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1971 pw.println(nai.toString()); 1972 pw.increaseIndent(); 1973 pw.println(String.format("Requests: %d request/%d total", 1974 nai.numRequestNetworkRequests(), nai.numNetworkRequests())); 1975 pw.increaseIndent(); 1976 for (int i = 0; i < nai.numNetworkRequests(); i++) { 1977 pw.println(nai.requestAt(i).toString()); 1978 } 1979 pw.decreaseIndent(); 1980 pw.println("Lingered:"); 1981 pw.increaseIndent(); 1982 nai.dumpLingerTimers(pw); 1983 pw.decreaseIndent(); 1984 pw.decreaseIndent(); 1985 } 1986 pw.decreaseIndent(); 1987 pw.println(); 1988 1989 pw.println("Metered Interfaces:"); 1990 pw.increaseIndent(); 1991 for (String value : mMeteredIfaces) { 1992 pw.println(value); 1993 } 1994 pw.decreaseIndent(); 1995 pw.println(); 1996 1997 pw.print("Restrict background: "); 1998 pw.println(mRestrictBackground); 1999 pw.println(); 2000 2001 pw.println("Status for known UIDs:"); 2002 pw.increaseIndent(); 2003 final int size = mUidRules.size(); 2004 for (int i = 0; i < size; i++) { 2005 final int uid = mUidRules.keyAt(i); 2006 pw.print("UID="); 2007 pw.print(uid); 2008 final int uidRules = mUidRules.get(uid, RULE_NONE); 2009 pw.print(" rules="); 2010 pw.print(uidRulesToString(uidRules)); 2011 pw.println(); 2012 } 2013 pw.println(); 2014 pw.decreaseIndent(); 2015 2016 pw.println("Network Requests:"); 2017 pw.increaseIndent(); 2018 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2019 pw.println(nri.toString()); 2020 } 2021 pw.println(); 2022 pw.decreaseIndent(); 2023 2024 mLegacyTypeTracker.dump(pw); 2025 2026 synchronized (this) { 2027 pw.print("mNetTransitionWakeLock: currently " + 2028 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 2029 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 2030 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 2031 } else { 2032 pw.println(", last requested never"); 2033 } 2034 } 2035 2036 pw.println(); 2037 mTethering.dump(fd, pw, args); 2038 2039 pw.println(); 2040 mKeepaliveTracker.dump(pw); 2041 2042 pw.println(); 2043 2044 if (mInetLog != null && mInetLog.size() > 0) { 2045 pw.println(); 2046 pw.println("Inet condition reports:"); 2047 pw.increaseIndent(); 2048 for(int i = 0; i < mInetLog.size(); i++) { 2049 pw.println(mInetLog.get(i)); 2050 } 2051 pw.decreaseIndent(); 2052 } 2053 2054 if (argsContain(args, "--short") == false) { 2055 pw.println(); 2056 synchronized (mValidationLogs) { 2057 pw.println("mValidationLogs (most recent first):"); 2058 for (ValidationLog p : mValidationLogs) { 2059 pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); 2060 pw.increaseIndent(); 2061 p.mLog.dump(fd, pw, args); 2062 pw.decreaseIndent(); 2063 } 2064 } 2065 2066 pw.println(); 2067 pw.println("mNetworkRequestInfoLogs (most recent first):"); 2068 pw.increaseIndent(); 2069 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 2070 pw.decreaseIndent(); 2071 2072 pw.println(); 2073 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 2074 pw.increaseIndent(); 2075 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 2076 pw.decreaseIndent(); 2077 } 2078 } 2079 2080 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 2081 if (nai.network == null) return false; 2082 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 2083 if (officialNai != null && officialNai.equals(nai)) return true; 2084 if (officialNai != null || VDBG) { 2085 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 2086 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 2087 " - " + nai); 2088 } 2089 return false; 2090 } 2091 2092 // must be stateless - things change under us. 2093 private class NetworkStateTrackerHandler extends Handler { 2094 public NetworkStateTrackerHandler(Looper looper) { 2095 super(looper); 2096 } 2097 2098 private boolean maybeHandleAsyncChannelMessage(Message msg) { 2099 switch (msg.what) { 2100 default: 2101 return false; 2102 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2103 handleAsyncChannelHalfConnect(msg); 2104 break; 2105 } 2106 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2107 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2108 if (nai != null) nai.asyncChannel.disconnect(); 2109 break; 2110 } 2111 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2112 handleAsyncChannelDisconnected(msg); 2113 break; 2114 } 2115 } 2116 return true; 2117 } 2118 2119 private void maybeHandleNetworkAgentMessage(Message msg) { 2120 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2121 if (nai == null) { 2122 if (VDBG) { 2123 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 2124 log(String.format("%s from unknown NetworkAgent", what)); 2125 } 2126 return; 2127 } 2128 2129 switch (msg.what) { 2130 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2131 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2132 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2133 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 2134 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2135 } 2136 if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( 2137 networkCapabilities)) { 2138 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 2139 + nai.networkCapabilities + " -> " + networkCapabilities); 2140 } 2141 updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities); 2142 break; 2143 } 2144 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2145 if (VDBG) { 2146 log("Update of LinkProperties for " + nai.name() + 2147 "; created=" + nai.created + 2148 "; everConnected=" + nai.everConnected); 2149 } 2150 LinkProperties oldLp = nai.linkProperties; 2151 synchronized (nai) { 2152 nai.linkProperties = (LinkProperties)msg.obj; 2153 } 2154 if (nai.everConnected) updateLinkProperties(nai, oldLp); 2155 break; 2156 } 2157 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2158 NetworkInfo info = (NetworkInfo) msg.obj; 2159 updateNetworkInfo(nai, info); 2160 break; 2161 } 2162 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2163 Integer score = (Integer) msg.obj; 2164 if (score != null) updateNetworkScore(nai, score.intValue()); 2165 break; 2166 } 2167 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2168 try { 2169 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2170 } catch (Exception e) { 2171 // Never crash! 2172 loge("Exception in addVpnUidRanges: " + e); 2173 } 2174 break; 2175 } 2176 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2177 try { 2178 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2179 } catch (Exception e) { 2180 // Never crash! 2181 loge("Exception in removeVpnUidRanges: " + e); 2182 } 2183 break; 2184 } 2185 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2186 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2187 loge("ERROR: already-connected network explicitly selected."); 2188 } 2189 nai.networkMisc.explicitlySelected = true; 2190 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2191 break; 2192 } 2193 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2194 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2195 break; 2196 } 2197 } 2198 } 2199 2200 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2201 switch (msg.what) { 2202 default: 2203 return false; 2204 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2205 final NetworkAgentInfo nai; 2206 synchronized (mNetworkForNetId) { 2207 nai = mNetworkForNetId.get(msg.arg2); 2208 } 2209 if (nai != null) { 2210 final boolean valid = 2211 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2212 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2213 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2214 if (valid != nai.lastValidated) { 2215 final int oldScore = nai.getCurrentScore(); 2216 nai.lastValidated = valid; 2217 nai.everValidated |= valid; 2218 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2219 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2220 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2221 } 2222 updateInetCondition(nai); 2223 // Let the NetworkAgent know the state of its network 2224 Bundle redirectUrlBundle = new Bundle(); 2225 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2226 nai.asyncChannel.sendMessage( 2227 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2228 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2229 0, redirectUrlBundle); 2230 } 2231 break; 2232 } 2233 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2234 final int netId = msg.arg2; 2235 final boolean visible = (msg.arg1 != 0); 2236 final NetworkAgentInfo nai; 2237 synchronized (mNetworkForNetId) { 2238 nai = mNetworkForNetId.get(netId); 2239 } 2240 // If captive portal status has changed, update capabilities. 2241 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2242 final int oldScore = nai.getCurrentScore(); 2243 nai.lastCaptivePortalDetected = visible; 2244 nai.everCaptivePortalDetected |= visible; 2245 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2246 } 2247 if (!visible) { 2248 mNotifier.clearNotification(netId); 2249 } else { 2250 if (nai == null) { 2251 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2252 break; 2253 } 2254 if (!nai.networkMisc.provisioningNotificationDisabled) { 2255 mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null, 2256 (PendingIntent) msg.obj, nai.networkMisc.explicitlySelected); 2257 } 2258 } 2259 break; 2260 } 2261 } 2262 return true; 2263 } 2264 2265 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2266 switch (msg.what) { 2267 default: 2268 return false; 2269 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2270 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2271 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2272 handleLingerComplete(nai); 2273 } 2274 break; 2275 } 2276 } 2277 return true; 2278 } 2279 2280 @Override 2281 public void handleMessage(Message msg) { 2282 if (!maybeHandleAsyncChannelMessage(msg) && 2283 !maybeHandleNetworkMonitorMessage(msg) && 2284 !maybeHandleNetworkAgentInfoMessage(msg)) { 2285 maybeHandleNetworkAgentMessage(msg); 2286 } 2287 } 2288 } 2289 2290 private void updateLingerState(NetworkAgentInfo nai, long now) { 2291 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2292 // 2. If the network was lingering and there are now requests, unlinger it. 2293 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2294 // one lingered request, start lingering. 2295 nai.updateLingerTimer(); 2296 if (nai.isLingering() && nai.numRequestNetworkRequests() > 0) { 2297 if (DBG) log("Unlingering " + nai.name()); 2298 nai.unlinger(); 2299 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2300 } else if (unneeded(nai) && nai.getLingerExpiry() > 0) { // unneeded() calls isLingering() 2301 int lingerTime = (int) (nai.getLingerExpiry() - now); 2302 if (DBG) { 2303 Log.d(TAG, "Lingering " + nai.name() + " for " + lingerTime + "ms"); 2304 } 2305 nai.linger(); 2306 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2307 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2308 } 2309 } 2310 2311 private void handleAsyncChannelHalfConnect(Message msg) { 2312 AsyncChannel ac = (AsyncChannel) msg.obj; 2313 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2314 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2315 if (VDBG) log("NetworkFactory connected"); 2316 // A network factory has connected. Send it all current NetworkRequests. 2317 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2318 if (nri.request.isListen()) continue; 2319 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2320 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2321 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2322 } 2323 } else { 2324 loge("Error connecting NetworkFactory"); 2325 mNetworkFactoryInfos.remove(msg.obj); 2326 } 2327 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2328 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2329 if (VDBG) log("NetworkAgent connected"); 2330 // A network agent has requested a connection. Establish the connection. 2331 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2332 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2333 } else { 2334 loge("Error connecting NetworkAgent"); 2335 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2336 if (nai != null) { 2337 final boolean wasDefault = isDefaultNetwork(nai); 2338 synchronized (mNetworkForNetId) { 2339 mNetworkForNetId.remove(nai.network.netId); 2340 mNetIdInUse.delete(nai.network.netId); 2341 } 2342 // Just in case. 2343 mLegacyTypeTracker.remove(nai, wasDefault); 2344 } 2345 } 2346 } 2347 } 2348 2349 private void handleAsyncChannelDisconnected(Message msg) { 2350 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2351 if (nai != null) { 2352 if (DBG) { 2353 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2354 } 2355 // A network agent has disconnected. 2356 // TODO - if we move the logic to the network agent (have them disconnect 2357 // because they lost all their requests or because their score isn't good) 2358 // then they would disconnect organically, report their new state and then 2359 // disconnect the channel. 2360 if (nai.networkInfo.isConnected()) { 2361 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2362 null, null); 2363 } 2364 final boolean wasDefault = isDefaultNetwork(nai); 2365 if (wasDefault) { 2366 mDefaultInetConditionPublished = 0; 2367 // Log default network disconnection before required book-keeping. 2368 // Let rematchAllNetworksAndRequests() below record a new default network event 2369 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2370 // whose timestamps tell how long it takes to recover a default network. 2371 logDefaultNetworkEvent(null, nai); 2372 } 2373 notifyIfacesChangedForNetworkStats(); 2374 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2375 // by other networks that are already connected. Perhaps that can be done by 2376 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2377 // of rematchAllNetworksAndRequests 2378 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2379 mKeepaliveTracker.handleStopAllKeepalives(nai, 2380 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2381 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2382 mNetworkAgentInfos.remove(msg.replyTo); 2383 updateClat(null, nai.linkProperties, nai); 2384 synchronized (mNetworkForNetId) { 2385 // Remove the NetworkAgent, but don't mark the netId as 2386 // available until we've told netd to delete it below. 2387 mNetworkForNetId.remove(nai.network.netId); 2388 } 2389 // Remove all previously satisfied requests. 2390 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2391 NetworkRequest request = nai.requestAt(i); 2392 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2393 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2394 mNetworkForRequestId.remove(request.requestId); 2395 sendUpdatedScoreToFactories(request, 0); 2396 } 2397 } 2398 nai.clearLingerState(); 2399 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2400 removeDataActivityTracking(nai); 2401 notifyLockdownVpn(nai); 2402 requestNetworkTransitionWakelock(nai.name()); 2403 } 2404 mLegacyTypeTracker.remove(nai, wasDefault); 2405 rematchAllNetworksAndRequests(null, 0); 2406 mLingerMonitor.noteDisconnect(nai); 2407 if (nai.created) { 2408 // Tell netd to clean up the configuration for this network 2409 // (routing rules, DNS, etc). 2410 // This may be slow as it requires a lot of netd shelling out to ip and 2411 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2412 // after we've rematched networks with requests which should make a potential 2413 // fallback network the default or requested a new network from the 2414 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2415 // long time. 2416 try { 2417 mNetd.removeNetwork(nai.network.netId); 2418 } catch (Exception e) { 2419 loge("Exception removing network: " + e); 2420 } 2421 } 2422 synchronized (mNetworkForNetId) { 2423 mNetIdInUse.delete(nai.network.netId); 2424 } 2425 } else { 2426 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2427 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2428 } 2429 } 2430 2431 // If this method proves to be too slow then we can maintain a separate 2432 // pendingIntent => NetworkRequestInfo map. 2433 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2434 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2435 Intent intent = pendingIntent.getIntent(); 2436 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2437 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2438 if (existingPendingIntent != null && 2439 existingPendingIntent.getIntent().filterEquals(intent)) { 2440 return entry.getValue(); 2441 } 2442 } 2443 return null; 2444 } 2445 2446 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2447 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2448 2449 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2450 if (existingRequest != null) { // remove the existing request. 2451 if (DBG) log("Replacing " + existingRequest.request + " with " 2452 + nri.request + " because their intents matched."); 2453 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2454 } 2455 handleRegisterNetworkRequest(nri); 2456 } 2457 2458 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2459 mNetworkRequests.put(nri.request, nri); 2460 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2461 if (nri.request.isListen()) { 2462 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2463 if (nri.request.networkCapabilities.hasSignalStrength() && 2464 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2465 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2466 } 2467 } 2468 } 2469 rematchAllNetworksAndRequests(null, 0); 2470 if (nri.request.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2471 sendUpdatedScoreToFactories(nri.request, 0); 2472 } 2473 } 2474 2475 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2476 int callingUid) { 2477 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2478 if (nri != null) { 2479 handleReleaseNetworkRequest(nri.request, callingUid); 2480 } 2481 } 2482 2483 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2484 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2485 // would it have a chance of satisfying any NetworkRequests. 2486 private boolean unneeded(NetworkAgentInfo nai) { 2487 if (!nai.everConnected || nai.isVPN() || 2488 nai.isLingering() || nai.numRequestNetworkRequests() > 0) { 2489 return false; 2490 } 2491 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2492 // If this Network is already the highest scoring Network for a request, or if 2493 // there is hope for it to become one if it validated, then it is needed. 2494 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2495 (nai.isSatisfyingRequest(nri.request.requestId) || 2496 // Note that this catches two important cases: 2497 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2498 // is currently satisfying the request. This is desirable when 2499 // cellular ends up validating but WiFi does not. 2500 // 2. Unvalidated WiFi will not be reaped when validated cellular 2501 // is currently satisfying the request. This is desirable when 2502 // WiFi ends up validating and out scoring cellular. 2503 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2504 nai.getCurrentScoreAsValidated())) { 2505 return false; 2506 } 2507 } 2508 return true; 2509 } 2510 2511 private NetworkRequestInfo getNriForAppRequest( 2512 NetworkRequest request, int callingUid, String requestedOperation) { 2513 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2514 2515 if (nri != null) { 2516 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2517 log(String.format("UID %d attempted to %s for unowned request %s", 2518 callingUid, requestedOperation, nri)); 2519 return null; 2520 } 2521 } 2522 2523 return nri; 2524 } 2525 2526 private void handleRequestCallbackUpdate(NetworkRequest request, int callingUid, 2527 String description, int callbackType) { 2528 final NetworkRequestInfo nri = getNriForAppRequest(request, callingUid, description); 2529 if (nri == null) return; 2530 2531 final NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2532 // The network that is satisfying this request may have changed since 2533 // the application requested the update. 2534 // 2535 // - If the request is no longer satisfied, don't send any updates. 2536 // - If the request is satisfied by a different network, it is the 2537 // caller's responsibility to check that the Network object in the 2538 // callback matches the network that was returned in the last 2539 // onAvailable() callback for this request. 2540 if (nai == null) return; 2541 callCallbackForRequest(nri, nai, callbackType, 0); 2542 } 2543 2544 private void handleRequestLinkProperties(NetworkRequest request, int callingUid) { 2545 handleRequestCallbackUpdate(request, callingUid, 2546 "request LinkProperties", ConnectivityManager.CALLBACK_IP_CHANGED); 2547 } 2548 2549 private void handleRequestNetworkCapabilities(NetworkRequest request, int callingUid) { 2550 handleRequestCallbackUpdate(request, callingUid, 2551 "request NetworkCapabilities", ConnectivityManager.CALLBACK_CAP_CHANGED); 2552 } 2553 2554 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2555 final NetworkRequestInfo nri = getNriForAppRequest( 2556 request, callingUid, "release NetworkRequest"); 2557 if (nri == null) return; 2558 2559 if (VDBG || (DBG && nri.request.isRequest())) log("releasing " + request); 2560 nri.unlinkDeathRecipient(); 2561 mNetworkRequests.remove(request); 2562 synchronized (mUidToNetworkRequestCount) { 2563 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2564 if (requests < 1) { 2565 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2566 nri.mUid); 2567 } else if (requests == 1) { 2568 mUidToNetworkRequestCount.removeAt( 2569 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2570 } else { 2571 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2572 } 2573 } 2574 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2575 if (nri.request.isRequest()) { 2576 boolean wasKept = false; 2577 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2578 if (nai != null) { 2579 nai.removeRequest(nri.request.requestId); 2580 if (VDBG) { 2581 log(" Removing from current network " + nai.name() + 2582 ", leaving " + nai.numNetworkRequests() + " requests."); 2583 } 2584 // If there are still lingered requests on this network, don't tear it down, 2585 // but resume lingering instead. 2586 updateLingerState(nai, SystemClock.elapsedRealtime()); 2587 if (unneeded(nai)) { 2588 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2589 teardownUnneededNetwork(nai); 2590 } else { 2591 wasKept = true; 2592 } 2593 mNetworkForRequestId.remove(nri.request.requestId); 2594 } 2595 2596 // TODO: remove this code once we know that the Slog.wtf is never hit. 2597 // 2598 // Find all networks that are satisfying this request and remove the request 2599 // from their request lists. 2600 // TODO - it's my understanding that for a request there is only a single 2601 // network satisfying it, so this loop is wasteful 2602 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2603 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2604 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2605 otherNai.name() + ", but mNetworkAgentInfos says " + 2606 (nai != null ? nai.name() : "null")); 2607 } 2608 } 2609 2610 // Maintain the illusion. When this request arrived, we might have pretended 2611 // that a network connected to serve it, even though the network was already 2612 // connected. Now that this request has gone away, we might have to pretend 2613 // that the network disconnected. LegacyTypeTracker will generate that 2614 // phantom disconnect for this type. 2615 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2616 boolean doRemove = true; 2617 if (wasKept) { 2618 // check if any of the remaining requests for this network are for the 2619 // same legacy type - if so, don't remove the nai 2620 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2621 NetworkRequest otherRequest = nai.requestAt(i); 2622 if (otherRequest.legacyType == nri.request.legacyType && 2623 otherRequest.isRequest()) { 2624 if (DBG) log(" still have other legacy request - leaving"); 2625 doRemove = false; 2626 } 2627 } 2628 } 2629 2630 if (doRemove) { 2631 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2632 } 2633 } 2634 2635 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2636 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2637 nri.request); 2638 } 2639 } else { 2640 // listens don't have a singular affectedNetwork. Check all networks to see 2641 // if this listen request applies and remove it. 2642 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2643 nai.removeRequest(nri.request.requestId); 2644 if (nri.request.networkCapabilities.hasSignalStrength() && 2645 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2646 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2647 } 2648 } 2649 } 2650 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED, 0); 2651 } 2652 2653 @Override 2654 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2655 enforceConnectivityInternalPermission(); 2656 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2657 accept ? 1 : 0, always ? 1: 0, network)); 2658 } 2659 2660 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2661 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2662 " accept=" + accept + " always=" + always); 2663 2664 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2665 if (nai == null) { 2666 // Nothing to do. 2667 return; 2668 } 2669 2670 if (nai.everValidated) { 2671 // The network validated while the dialog box was up. Take no action. 2672 return; 2673 } 2674 2675 if (!nai.networkMisc.explicitlySelected) { 2676 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2677 } 2678 2679 if (accept != nai.networkMisc.acceptUnvalidated) { 2680 int oldScore = nai.getCurrentScore(); 2681 nai.networkMisc.acceptUnvalidated = accept; 2682 rematchAllNetworksAndRequests(nai, oldScore); 2683 sendUpdatedScoreToFactories(nai); 2684 } 2685 2686 if (always) { 2687 nai.asyncChannel.sendMessage( 2688 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2689 } 2690 2691 if (!accept) { 2692 // Tell the NetworkAgent to not automatically reconnect to the network. 2693 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2694 // Teardown the nework. 2695 teardownUnneededNetwork(nai); 2696 } 2697 2698 } 2699 2700 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2701 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2702 mHandler.sendMessageDelayed( 2703 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2704 PROMPT_UNVALIDATED_DELAY_MS); 2705 } 2706 2707 private void handlePromptUnvalidated(Network network) { 2708 if (VDBG) log("handlePromptUnvalidated " + network); 2709 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2710 2711 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2712 // we haven't already been told to switch to it regardless of whether it validated or not. 2713 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2714 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2715 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2716 return; 2717 } 2718 2719 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2720 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2721 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2722 intent.setClassName("com.android.settings", 2723 "com.android.settings.wifi.WifiNoInternetDialog"); 2724 2725 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2726 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2727 2728 mNotifier.showNotification(nai.network.netId, NotificationType.NO_INTERNET, nai, null, 2729 pendingIntent, true); 2730 } 2731 2732 private class InternalHandler extends Handler { 2733 public InternalHandler(Looper looper) { 2734 super(looper); 2735 } 2736 2737 @Override 2738 public void handleMessage(Message msg) { 2739 switch (msg.what) { 2740 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2741 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2742 String causedBy = null; 2743 synchronized (ConnectivityService.this) { 2744 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2745 mNetTransitionWakeLock.isHeld()) { 2746 mNetTransitionWakeLock.release(); 2747 causedBy = mNetTransitionWakeLockCausedBy; 2748 } else { 2749 break; 2750 } 2751 } 2752 if (VDBG) { 2753 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2754 log("Failed to find a new network - expiring NetTransition Wakelock"); 2755 } else { 2756 log("NetTransition Wakelock (" + 2757 (causedBy == null ? "unknown" : causedBy) + 2758 " cleared because we found a replacement network"); 2759 } 2760 } 2761 break; 2762 } 2763 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2764 handleDeprecatedGlobalHttpProxy(); 2765 break; 2766 } 2767 case EVENT_PROXY_HAS_CHANGED: { 2768 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2769 break; 2770 } 2771 case EVENT_REGISTER_NETWORK_FACTORY: { 2772 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2773 break; 2774 } 2775 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2776 handleUnregisterNetworkFactory((Messenger)msg.obj); 2777 break; 2778 } 2779 case EVENT_REGISTER_NETWORK_AGENT: { 2780 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2781 break; 2782 } 2783 case EVENT_REGISTER_NETWORK_REQUEST: 2784 case EVENT_REGISTER_NETWORK_LISTENER: { 2785 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2786 break; 2787 } 2788 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2789 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2790 handleRegisterNetworkRequestWithIntent(msg); 2791 break; 2792 } 2793 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2794 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2795 break; 2796 } 2797 case EVENT_RELEASE_NETWORK_REQUEST: { 2798 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2799 break; 2800 } 2801 case EVENT_SET_ACCEPT_UNVALIDATED: { 2802 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2803 break; 2804 } 2805 case EVENT_PROMPT_UNVALIDATED: { 2806 handlePromptUnvalidated((Network) msg.obj); 2807 break; 2808 } 2809 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2810 handleMobileDataAlwaysOn(); 2811 break; 2812 } 2813 case EVENT_REQUEST_LINKPROPERTIES: 2814 handleRequestLinkProperties((NetworkRequest) msg.obj, msg.arg1); 2815 break; 2816 case EVENT_REQUEST_NETCAPABILITIES: 2817 handleRequestNetworkCapabilities((NetworkRequest) msg.obj, msg.arg1); 2818 break; 2819 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2820 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2821 mKeepaliveTracker.handleStartKeepalive(msg); 2822 break; 2823 } 2824 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2825 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2826 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2827 int slot = msg.arg1; 2828 int reason = msg.arg2; 2829 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2830 break; 2831 } 2832 case EVENT_SYSTEM_READY: { 2833 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2834 nai.networkMonitor.systemReady = true; 2835 } 2836 break; 2837 } 2838 } 2839 } 2840 } 2841 2842 // javadoc from interface 2843 @Override 2844 public int tether(String iface) { 2845 ConnectivityManager.enforceTetherChangePermission(mContext); 2846 if (isTetheringSupported()) { 2847 final int status = mTethering.tether(iface); 2848 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2849 try { 2850 mPolicyManager.onTetheringChanged(iface, true); 2851 } catch (RemoteException e) { 2852 } 2853 } 2854 return status; 2855 } else { 2856 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2857 } 2858 } 2859 2860 // javadoc from interface 2861 @Override 2862 public int untether(String iface) { 2863 ConnectivityManager.enforceTetherChangePermission(mContext); 2864 2865 if (isTetheringSupported()) { 2866 final int status = mTethering.untether(iface); 2867 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2868 try { 2869 mPolicyManager.onTetheringChanged(iface, false); 2870 } catch (RemoteException e) { 2871 } 2872 } 2873 return status; 2874 } else { 2875 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2876 } 2877 } 2878 2879 // javadoc from interface 2880 @Override 2881 public int getLastTetherError(String iface) { 2882 enforceTetherAccessPermission(); 2883 2884 if (isTetheringSupported()) { 2885 return mTethering.getLastTetherError(iface); 2886 } else { 2887 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2888 } 2889 } 2890 2891 // TODO - proper iface API for selection by property, inspection, etc 2892 @Override 2893 public String[] getTetherableUsbRegexs() { 2894 enforceTetherAccessPermission(); 2895 if (isTetheringSupported()) { 2896 return mTethering.getTetherableUsbRegexs(); 2897 } else { 2898 return new String[0]; 2899 } 2900 } 2901 2902 @Override 2903 public String[] getTetherableWifiRegexs() { 2904 enforceTetherAccessPermission(); 2905 if (isTetheringSupported()) { 2906 return mTethering.getTetherableWifiRegexs(); 2907 } else { 2908 return new String[0]; 2909 } 2910 } 2911 2912 @Override 2913 public String[] getTetherableBluetoothRegexs() { 2914 enforceTetherAccessPermission(); 2915 if (isTetheringSupported()) { 2916 return mTethering.getTetherableBluetoothRegexs(); 2917 } else { 2918 return new String[0]; 2919 } 2920 } 2921 2922 @Override 2923 public int setUsbTethering(boolean enable) { 2924 ConnectivityManager.enforceTetherChangePermission(mContext); 2925 if (isTetheringSupported()) { 2926 return mTethering.setUsbTethering(enable); 2927 } else { 2928 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2929 } 2930 } 2931 2932 // TODO - move iface listing, queries, etc to new module 2933 // javadoc from interface 2934 @Override 2935 public String[] getTetherableIfaces() { 2936 enforceTetherAccessPermission(); 2937 return mTethering.getTetherableIfaces(); 2938 } 2939 2940 @Override 2941 public String[] getTetheredIfaces() { 2942 enforceTetherAccessPermission(); 2943 return mTethering.getTetheredIfaces(); 2944 } 2945 2946 @Override 2947 public String[] getTetheringErroredIfaces() { 2948 enforceTetherAccessPermission(); 2949 return mTethering.getErroredIfaces(); 2950 } 2951 2952 @Override 2953 public String[] getTetheredDhcpRanges() { 2954 enforceConnectivityInternalPermission(); 2955 return mTethering.getTetheredDhcpRanges(); 2956 } 2957 2958 // if ro.tether.denied = true we default to no tethering 2959 // gservices could set the secure setting to 1 though to enable it on a build where it 2960 // had previously been turned off. 2961 @Override 2962 public boolean isTetheringSupported() { 2963 enforceTetherAccessPermission(); 2964 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2965 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2966 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2967 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2968 return tetherEnabledInSettings && mUserManager.isAdminUser() && 2969 ((mTethering.getTetherableUsbRegexs().length != 0 || 2970 mTethering.getTetherableWifiRegexs().length != 0 || 2971 mTethering.getTetherableBluetoothRegexs().length != 0) && 2972 mTethering.getUpstreamIfaceTypes().length != 0); 2973 } 2974 2975 @Override 2976 public void startTethering(int type, ResultReceiver receiver, 2977 boolean showProvisioningUi) { 2978 ConnectivityManager.enforceTetherChangePermission(mContext); 2979 if (!isTetheringSupported()) { 2980 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 2981 return; 2982 } 2983 mTethering.startTethering(type, receiver, showProvisioningUi); 2984 } 2985 2986 @Override 2987 public void stopTethering(int type) { 2988 ConnectivityManager.enforceTetherChangePermission(mContext); 2989 mTethering.stopTethering(type); 2990 } 2991 2992 // Called when we lose the default network and have no replacement yet. 2993 // This will automatically be cleared after X seconds or a new default network 2994 // becomes CONNECTED, whichever happens first. The timer is started by the 2995 // first caller and not restarted by subsequent callers. 2996 private void requestNetworkTransitionWakelock(String forWhom) { 2997 int serialNum = 0; 2998 synchronized (this) { 2999 if (mNetTransitionWakeLock.isHeld()) return; 3000 serialNum = ++mNetTransitionWakeLockSerialNumber; 3001 mNetTransitionWakeLock.acquire(); 3002 mNetTransitionWakeLockCausedBy = forWhom; 3003 } 3004 mHandler.sendMessageDelayed(mHandler.obtainMessage( 3005 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 3006 mNetTransitionWakeLockTimeout); 3007 return; 3008 } 3009 3010 // 100 percent is full good, 0 is full bad. 3011 @Override 3012 public void reportInetCondition(int networkType, int percentage) { 3013 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 3014 if (nai == null) return; 3015 reportNetworkConnectivity(nai.network, percentage > 50); 3016 } 3017 3018 @Override 3019 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 3020 enforceAccessPermission(); 3021 enforceInternetPermission(); 3022 3023 NetworkAgentInfo nai; 3024 if (network == null) { 3025 nai = getDefaultNetwork(); 3026 } else { 3027 nai = getNetworkAgentInfoForNetwork(network); 3028 } 3029 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 3030 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 3031 return; 3032 } 3033 // Revalidate if the app report does not match our current validated state. 3034 if (hasConnectivity == nai.lastValidated) return; 3035 final int uid = Binder.getCallingUid(); 3036 if (DBG) { 3037 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 3038 ") by " + uid); 3039 } 3040 synchronized (nai) { 3041 // Validating a network that has not yet connected could result in a call to 3042 // rematchNetworkAndRequests() which is not meant to work on such networks. 3043 if (!nai.everConnected) return; 3044 3045 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 3046 3047 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 3048 } 3049 } 3050 3051 private ProxyInfo getDefaultProxy() { 3052 // this information is already available as a world read/writable jvm property 3053 // so this API change wouldn't have a benifit. It also breaks the passing 3054 // of proxy info to all the JVMs. 3055 // enforceAccessPermission(); 3056 synchronized (mProxyLock) { 3057 ProxyInfo ret = mGlobalProxy; 3058 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3059 return ret; 3060 } 3061 } 3062 3063 @Override 3064 public ProxyInfo getProxyForNetwork(Network network) { 3065 if (network == null) return getDefaultProxy(); 3066 final ProxyInfo globalProxy = getGlobalProxy(); 3067 if (globalProxy != null) return globalProxy; 3068 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3069 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3070 // caller may not have. 3071 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3072 if (nai == null) return null; 3073 synchronized (nai) { 3074 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3075 if (proxyInfo == null) return null; 3076 return new ProxyInfo(proxyInfo); 3077 } 3078 } 3079 3080 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3081 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3082 // proxy is null then there is no proxy in place). 3083 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3084 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3085 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3086 proxy = null; 3087 } 3088 return proxy; 3089 } 3090 3091 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3092 // better for determining if a new proxy broadcast is necessary: 3093 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3094 // avoid unnecessary broadcasts. 3095 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3096 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3097 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3098 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3099 // all set. 3100 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3101 a = canonicalizeProxyInfo(a); 3102 b = canonicalizeProxyInfo(b); 3103 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3104 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3105 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3106 } 3107 3108 public void setGlobalProxy(ProxyInfo proxyProperties) { 3109 enforceConnectivityInternalPermission(); 3110 3111 synchronized (mProxyLock) { 3112 if (proxyProperties == mGlobalProxy) return; 3113 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3114 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3115 3116 String host = ""; 3117 int port = 0; 3118 String exclList = ""; 3119 String pacFileUrl = ""; 3120 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3121 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3122 if (!proxyProperties.isValid()) { 3123 if (DBG) 3124 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3125 return; 3126 } 3127 mGlobalProxy = new ProxyInfo(proxyProperties); 3128 host = mGlobalProxy.getHost(); 3129 port = mGlobalProxy.getPort(); 3130 exclList = mGlobalProxy.getExclusionListAsString(); 3131 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3132 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3133 } 3134 } else { 3135 mGlobalProxy = null; 3136 } 3137 ContentResolver res = mContext.getContentResolver(); 3138 final long token = Binder.clearCallingIdentity(); 3139 try { 3140 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3141 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3142 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3143 exclList); 3144 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3145 } finally { 3146 Binder.restoreCallingIdentity(token); 3147 } 3148 3149 if (mGlobalProxy == null) { 3150 proxyProperties = mDefaultProxy; 3151 } 3152 sendProxyBroadcast(proxyProperties); 3153 } 3154 } 3155 3156 private void loadGlobalProxy() { 3157 ContentResolver res = mContext.getContentResolver(); 3158 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3159 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3160 String exclList = Settings.Global.getString(res, 3161 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3162 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3163 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3164 ProxyInfo proxyProperties; 3165 if (!TextUtils.isEmpty(pacFileUrl)) { 3166 proxyProperties = new ProxyInfo(pacFileUrl); 3167 } else { 3168 proxyProperties = new ProxyInfo(host, port, exclList); 3169 } 3170 if (!proxyProperties.isValid()) { 3171 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3172 return; 3173 } 3174 3175 synchronized (mProxyLock) { 3176 mGlobalProxy = proxyProperties; 3177 } 3178 } 3179 } 3180 3181 public ProxyInfo getGlobalProxy() { 3182 // this information is already available as a world read/writable jvm property 3183 // so this API change wouldn't have a benifit. It also breaks the passing 3184 // of proxy info to all the JVMs. 3185 // enforceAccessPermission(); 3186 synchronized (mProxyLock) { 3187 return mGlobalProxy; 3188 } 3189 } 3190 3191 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3192 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3193 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3194 proxy = null; 3195 } 3196 synchronized (mProxyLock) { 3197 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3198 if (mDefaultProxy == proxy) return; // catches repeated nulls 3199 if (proxy != null && !proxy.isValid()) { 3200 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3201 return; 3202 } 3203 3204 // This call could be coming from the PacManager, containing the port of the local 3205 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3206 // global (to get the correct local port), and send a broadcast. 3207 // TODO: Switch PacManager to have its own message to send back rather than 3208 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3209 if ((mGlobalProxy != null) && (proxy != null) 3210 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3211 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3212 mGlobalProxy = proxy; 3213 sendProxyBroadcast(mGlobalProxy); 3214 return; 3215 } 3216 mDefaultProxy = proxy; 3217 3218 if (mGlobalProxy != null) return; 3219 if (!mDefaultProxyDisabled) { 3220 sendProxyBroadcast(proxy); 3221 } 3222 } 3223 } 3224 3225 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3226 // This method gets called when any network changes proxy, but the broadcast only ever contains 3227 // the default proxy (even if it hasn't changed). 3228 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3229 // world where an app might be bound to a non-default network. 3230 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3231 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3232 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3233 3234 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3235 sendProxyBroadcast(getDefaultProxy()); 3236 } 3237 } 3238 3239 private void handleDeprecatedGlobalHttpProxy() { 3240 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3241 Settings.Global.HTTP_PROXY); 3242 if (!TextUtils.isEmpty(proxy)) { 3243 String data[] = proxy.split(":"); 3244 if (data.length == 0) { 3245 return; 3246 } 3247 3248 String proxyHost = data[0]; 3249 int proxyPort = 8080; 3250 if (data.length > 1) { 3251 try { 3252 proxyPort = Integer.parseInt(data[1]); 3253 } catch (NumberFormatException e) { 3254 return; 3255 } 3256 } 3257 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3258 setGlobalProxy(p); 3259 } 3260 } 3261 3262 private void sendProxyBroadcast(ProxyInfo proxy) { 3263 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3264 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3265 if (DBG) log("sending Proxy Broadcast for " + proxy); 3266 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3267 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3268 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3269 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3270 final long ident = Binder.clearCallingIdentity(); 3271 try { 3272 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3273 } finally { 3274 Binder.restoreCallingIdentity(ident); 3275 } 3276 } 3277 3278 private static class SettingsObserver extends ContentObserver { 3279 final private HashMap<Uri, Integer> mUriEventMap; 3280 final private Context mContext; 3281 final private Handler mHandler; 3282 3283 SettingsObserver(Context context, Handler handler) { 3284 super(null); 3285 mUriEventMap = new HashMap<Uri, Integer>(); 3286 mContext = context; 3287 mHandler = handler; 3288 } 3289 3290 void observe(Uri uri, int what) { 3291 mUriEventMap.put(uri, what); 3292 final ContentResolver resolver = mContext.getContentResolver(); 3293 resolver.registerContentObserver(uri, false, this); 3294 } 3295 3296 @Override 3297 public void onChange(boolean selfChange) { 3298 Slog.wtf(TAG, "Should never be reached."); 3299 } 3300 3301 @Override 3302 public void onChange(boolean selfChange, Uri uri) { 3303 final Integer what = mUriEventMap.get(uri); 3304 if (what != null) { 3305 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3306 } else { 3307 loge("No matching event to send for URI=" + uri); 3308 } 3309 } 3310 } 3311 3312 private static void log(String s) { 3313 Slog.d(TAG, s); 3314 } 3315 3316 private static void loge(String s) { 3317 Slog.e(TAG, s); 3318 } 3319 3320 private static <T> T checkNotNull(T value, String message) { 3321 if (value == null) { 3322 throw new NullPointerException(message); 3323 } 3324 return value; 3325 } 3326 3327 /** 3328 * Prepare for a VPN application. 3329 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3330 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3331 * 3332 * @param oldPackage Package name of the application which currently controls VPN, which will 3333 * be replaced. If there is no such application, this should should either be 3334 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3335 * @param newPackage Package name of the application which should gain control of VPN, or 3336 * {@code null} to disable. 3337 * @param userId User for whom to prepare the new VPN. 3338 * 3339 * @hide 3340 */ 3341 @Override 3342 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3343 int userId) { 3344 enforceCrossUserPermission(userId); 3345 throwIfLockdownEnabled(); 3346 3347 synchronized(mVpns) { 3348 Vpn vpn = mVpns.get(userId); 3349 if (vpn != null) { 3350 return vpn.prepare(oldPackage, newPackage); 3351 } else { 3352 return false; 3353 } 3354 } 3355 } 3356 3357 /** 3358 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3359 * This method is used by system-privileged apps. 3360 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3361 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3362 * 3363 * @param packageName The package for which authorization state should change. 3364 * @param userId User for whom {@code packageName} is installed. 3365 * @param authorized {@code true} if this app should be able to start a VPN connection without 3366 * explicit user approval, {@code false} if not. 3367 * 3368 * @hide 3369 */ 3370 @Override 3371 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3372 enforceCrossUserPermission(userId); 3373 3374 synchronized(mVpns) { 3375 Vpn vpn = mVpns.get(userId); 3376 if (vpn != null) { 3377 vpn.setPackageAuthorization(packageName, authorized); 3378 } 3379 } 3380 } 3381 3382 /** 3383 * Configure a TUN interface and return its file descriptor. Parameters 3384 * are encoded and opaque to this class. This method is used by VpnBuilder 3385 * and not available in ConnectivityManager. Permissions are checked in 3386 * Vpn class. 3387 * @hide 3388 */ 3389 @Override 3390 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3391 throwIfLockdownEnabled(); 3392 int user = UserHandle.getUserId(Binder.getCallingUid()); 3393 synchronized(mVpns) { 3394 return mVpns.get(user).establish(config); 3395 } 3396 } 3397 3398 /** 3399 * Start legacy VPN, controlling native daemons as needed. Creates a 3400 * secondary thread to perform connection work, returning quickly. 3401 */ 3402 @Override 3403 public void startLegacyVpn(VpnProfile profile) { 3404 throwIfLockdownEnabled(); 3405 final LinkProperties egress = getActiveLinkProperties(); 3406 if (egress == null) { 3407 throw new IllegalStateException("Missing active network connection"); 3408 } 3409 int user = UserHandle.getUserId(Binder.getCallingUid()); 3410 synchronized(mVpns) { 3411 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3412 } 3413 } 3414 3415 /** 3416 * Return the information of the ongoing legacy VPN. This method is used 3417 * by VpnSettings and not available in ConnectivityManager. Permissions 3418 * are checked in Vpn class. 3419 */ 3420 @Override 3421 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3422 enforceCrossUserPermission(userId); 3423 3424 synchronized(mVpns) { 3425 return mVpns.get(userId).getLegacyVpnInfo(); 3426 } 3427 } 3428 3429 /** 3430 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3431 * and not available in ConnectivityManager. 3432 */ 3433 @Override 3434 public VpnInfo[] getAllVpnInfo() { 3435 enforceConnectivityInternalPermission(); 3436 if (mLockdownEnabled) { 3437 return new VpnInfo[0]; 3438 } 3439 3440 synchronized(mVpns) { 3441 List<VpnInfo> infoList = new ArrayList<>(); 3442 for (int i = 0; i < mVpns.size(); i++) { 3443 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3444 if (info != null) { 3445 infoList.add(info); 3446 } 3447 } 3448 return infoList.toArray(new VpnInfo[infoList.size()]); 3449 } 3450 } 3451 3452 /** 3453 * @return VPN information for accounting, or null if we can't retrieve all required 3454 * information, e.g primary underlying iface. 3455 */ 3456 @Nullable 3457 private VpnInfo createVpnInfo(Vpn vpn) { 3458 VpnInfo info = vpn.getVpnInfo(); 3459 if (info == null) { 3460 return null; 3461 } 3462 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3463 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3464 // the underlyingNetworks list. 3465 if (underlyingNetworks == null) { 3466 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3467 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3468 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3469 } 3470 } else if (underlyingNetworks.length > 0) { 3471 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3472 if (linkProperties != null) { 3473 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3474 } 3475 } 3476 return info.primaryUnderlyingIface == null ? null : info; 3477 } 3478 3479 /** 3480 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3481 * VpnDialogs and not available in ConnectivityManager. 3482 * Permissions are checked in Vpn class. 3483 * @hide 3484 */ 3485 @Override 3486 public VpnConfig getVpnConfig(int userId) { 3487 enforceCrossUserPermission(userId); 3488 synchronized(mVpns) { 3489 Vpn vpn = mVpns.get(userId); 3490 if (vpn != null) { 3491 return vpn.getVpnConfig(); 3492 } else { 3493 return null; 3494 } 3495 } 3496 } 3497 3498 @Override 3499 public boolean updateLockdownVpn() { 3500 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3501 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3502 return false; 3503 } 3504 3505 // Tear down existing lockdown if profile was removed 3506 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3507 if (mLockdownEnabled) { 3508 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3509 final VpnProfile profile = VpnProfile.decode( 3510 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3511 if (profile == null) { 3512 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3513 setLockdownTracker(null); 3514 return true; 3515 } 3516 int user = UserHandle.getUserId(Binder.getCallingUid()); 3517 synchronized(mVpns) { 3518 Vpn vpn = mVpns.get(user); 3519 if (vpn == null) { 3520 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3521 return false; 3522 } 3523 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3524 } 3525 } else { 3526 setLockdownTracker(null); 3527 } 3528 3529 return true; 3530 } 3531 3532 /** 3533 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3534 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3535 */ 3536 private void setLockdownTracker(LockdownVpnTracker tracker) { 3537 // Shutdown any existing tracker 3538 final LockdownVpnTracker existing = mLockdownTracker; 3539 mLockdownTracker = null; 3540 if (existing != null) { 3541 existing.shutdown(); 3542 } 3543 3544 try { 3545 if (tracker != null) { 3546 mNetd.setFirewallEnabled(true); 3547 mNetd.setFirewallInterfaceRule("lo", true); 3548 mLockdownTracker = tracker; 3549 mLockdownTracker.init(); 3550 } else { 3551 mNetd.setFirewallEnabled(false); 3552 } 3553 } catch (RemoteException e) { 3554 // ignored; NMS lives inside system_server 3555 } 3556 } 3557 3558 private void throwIfLockdownEnabled() { 3559 if (mLockdownEnabled) { 3560 throw new IllegalStateException("Unavailable in lockdown mode"); 3561 } 3562 } 3563 3564 /** 3565 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3566 * some setup and then call {@code establish()} to connect. 3567 * 3568 * @return {@code true} if the service was started, the service was already connected, or there 3569 * was no always-on VPN to start. {@code false} otherwise. 3570 */ 3571 private boolean startAlwaysOnVpn(int userId) { 3572 synchronized (mVpns) { 3573 Vpn vpn = mVpns.get(userId); 3574 if (vpn == null) { 3575 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3576 // exists already. 3577 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3578 return false; 3579 } 3580 3581 return vpn.startAlwaysOnVpn(); 3582 } 3583 } 3584 3585 @Override 3586 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3587 enforceConnectivityInternalPermission(); 3588 enforceCrossUserPermission(userId); 3589 3590 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3591 if (LockdownVpnTracker.isEnabled()) { 3592 return false; 3593 } 3594 3595 synchronized (mVpns) { 3596 Vpn vpn = mVpns.get(userId); 3597 if (vpn == null) { 3598 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3599 return false; 3600 } 3601 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3602 return false; 3603 } 3604 if (!startAlwaysOnVpn(userId)) { 3605 vpn.setAlwaysOnPackage(null, false); 3606 return false; 3607 } 3608 3609 vpn.saveAlwaysOnPackage(); 3610 } 3611 return true; 3612 } 3613 3614 @Override 3615 public String getAlwaysOnVpnPackage(int userId) { 3616 enforceConnectivityInternalPermission(); 3617 enforceCrossUserPermission(userId); 3618 3619 synchronized (mVpns) { 3620 Vpn vpn = mVpns.get(userId); 3621 if (vpn == null) { 3622 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3623 return null; 3624 } 3625 return vpn.getAlwaysOnPackage(); 3626 } 3627 } 3628 3629 @Override 3630 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3631 // TODO: Remove? Any reason to trigger a provisioning check? 3632 return -1; 3633 } 3634 3635 /** Location to an updatable file listing carrier provisioning urls. 3636 * An example: 3637 * 3638 * <?xml version="1.0" encoding="utf-8"?> 3639 * <provisioningUrls> 3640 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3641 * </provisioningUrls> 3642 */ 3643 private static final String PROVISIONING_URL_PATH = 3644 "/data/misc/radio/provisioning_urls.xml"; 3645 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3646 3647 /** XML tag for root element. */ 3648 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3649 /** XML tag for individual url */ 3650 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3651 /** XML attribute for mcc */ 3652 private static final String ATTR_MCC = "mcc"; 3653 /** XML attribute for mnc */ 3654 private static final String ATTR_MNC = "mnc"; 3655 3656 private String getProvisioningUrlBaseFromFile() { 3657 FileReader fileReader = null; 3658 XmlPullParser parser = null; 3659 Configuration config = mContext.getResources().getConfiguration(); 3660 3661 try { 3662 fileReader = new FileReader(mProvisioningUrlFile); 3663 parser = Xml.newPullParser(); 3664 parser.setInput(fileReader); 3665 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3666 3667 while (true) { 3668 XmlUtils.nextElement(parser); 3669 3670 String element = parser.getName(); 3671 if (element == null) break; 3672 3673 if (element.equals(TAG_PROVISIONING_URL)) { 3674 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3675 try { 3676 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3677 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3678 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3679 parser.next(); 3680 if (parser.getEventType() == XmlPullParser.TEXT) { 3681 return parser.getText(); 3682 } 3683 } 3684 } 3685 } catch (NumberFormatException e) { 3686 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3687 } 3688 } 3689 } 3690 return null; 3691 } catch (FileNotFoundException e) { 3692 loge("Carrier Provisioning Urls file not found"); 3693 } catch (XmlPullParserException e) { 3694 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3695 } catch (IOException e) { 3696 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3697 } finally { 3698 if (fileReader != null) { 3699 try { 3700 fileReader.close(); 3701 } catch (IOException e) {} 3702 } 3703 } 3704 return null; 3705 } 3706 3707 @Override 3708 public String getMobileProvisioningUrl() { 3709 enforceConnectivityInternalPermission(); 3710 String url = getProvisioningUrlBaseFromFile(); 3711 if (TextUtils.isEmpty(url)) { 3712 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3713 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3714 } else { 3715 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3716 } 3717 // populate the iccid, imei and phone number in the provisioning url. 3718 if (!TextUtils.isEmpty(url)) { 3719 String phoneNumber = mTelephonyManager.getLine1Number(); 3720 if (TextUtils.isEmpty(phoneNumber)) { 3721 phoneNumber = "0000000000"; 3722 } 3723 url = String.format(url, 3724 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3725 mTelephonyManager.getDeviceId() /* IMEI */, 3726 phoneNumber /* Phone numer */); 3727 } 3728 3729 return url; 3730 } 3731 3732 @Override 3733 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3734 String action) { 3735 enforceConnectivityInternalPermission(); 3736 final long ident = Binder.clearCallingIdentity(); 3737 try { 3738 // Concatenate the range of types onto the range of NetIDs. 3739 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3740 mNotifier.setProvNotificationVisible(visible, id, action); 3741 } finally { 3742 Binder.restoreCallingIdentity(ident); 3743 } 3744 } 3745 3746 @Override 3747 public void setAirplaneMode(boolean enable) { 3748 enforceConnectivityInternalPermission(); 3749 final long ident = Binder.clearCallingIdentity(); 3750 try { 3751 final ContentResolver cr = mContext.getContentResolver(); 3752 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3753 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3754 intent.putExtra("state", enable); 3755 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3756 } finally { 3757 Binder.restoreCallingIdentity(ident); 3758 } 3759 } 3760 3761 private void onUserStart(int userId) { 3762 synchronized(mVpns) { 3763 Vpn userVpn = mVpns.get(userId); 3764 if (userVpn != null) { 3765 loge("Starting user already has a VPN"); 3766 return; 3767 } 3768 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3769 mVpns.put(userId, userVpn); 3770 3771 final ContentResolver cr = mContext.getContentResolver(); 3772 String alwaysOnPackage = Settings.Secure.getStringForUser(cr, 3773 Settings.Secure.ALWAYS_ON_VPN_APP, userId); 3774 final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, 3775 Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; 3776 if (alwaysOnPackage != null) { 3777 userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); 3778 } 3779 } 3780 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3781 updateLockdownVpn(); 3782 } 3783 } 3784 3785 private void onUserStop(int userId) { 3786 synchronized(mVpns) { 3787 Vpn userVpn = mVpns.get(userId); 3788 if (userVpn == null) { 3789 loge("Stopped user has no VPN"); 3790 return; 3791 } 3792 userVpn.onUserStopped(); 3793 mVpns.delete(userId); 3794 } 3795 } 3796 3797 private void onUserAdded(int userId) { 3798 synchronized(mVpns) { 3799 final int vpnsSize = mVpns.size(); 3800 for (int i = 0; i < vpnsSize; i++) { 3801 Vpn vpn = mVpns.valueAt(i); 3802 vpn.onUserAdded(userId); 3803 } 3804 } 3805 } 3806 3807 private void onUserRemoved(int userId) { 3808 synchronized(mVpns) { 3809 final int vpnsSize = mVpns.size(); 3810 for (int i = 0; i < vpnsSize; i++) { 3811 Vpn vpn = mVpns.valueAt(i); 3812 vpn.onUserRemoved(userId); 3813 } 3814 } 3815 } 3816 3817 private void onUserUnlocked(int userId) { 3818 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3819 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3820 updateLockdownVpn(); 3821 } else { 3822 startAlwaysOnVpn(userId); 3823 } 3824 } 3825 3826 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3827 @Override 3828 public void onReceive(Context context, Intent intent) { 3829 final String action = intent.getAction(); 3830 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3831 if (userId == UserHandle.USER_NULL) return; 3832 3833 if (Intent.ACTION_USER_STARTED.equals(action)) { 3834 onUserStart(userId); 3835 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3836 onUserStop(userId); 3837 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3838 onUserAdded(userId); 3839 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3840 onUserRemoved(userId); 3841 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3842 onUserUnlocked(userId); 3843 } 3844 } 3845 }; 3846 3847 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3848 new HashMap<Messenger, NetworkFactoryInfo>(); 3849 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3850 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3851 3852 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3853 // Map from UID to number of NetworkRequests that UID has filed. 3854 @GuardedBy("mUidToNetworkRequestCount") 3855 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3856 3857 private static class NetworkFactoryInfo { 3858 public final String name; 3859 public final Messenger messenger; 3860 public final AsyncChannel asyncChannel; 3861 3862 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3863 this.name = name; 3864 this.messenger = messenger; 3865 this.asyncChannel = asyncChannel; 3866 } 3867 } 3868 3869 private void ensureNetworkRequestHasType(NetworkRequest request) { 3870 if (request.type == NetworkRequest.Type.NONE) { 3871 throw new IllegalArgumentException( 3872 "All NetworkRequests in ConnectivityService must have a type"); 3873 } 3874 } 3875 3876 /** 3877 * Tracks info about the requester. 3878 * Also used to notice when the calling process dies so we can self-expire 3879 */ 3880 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3881 final NetworkRequest request; 3882 final PendingIntent mPendingIntent; 3883 boolean mPendingIntentSent; 3884 private final IBinder mBinder; 3885 final int mPid; 3886 final int mUid; 3887 final Messenger messenger; 3888 3889 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 3890 request = r; 3891 ensureNetworkRequestHasType(request); 3892 mPendingIntent = pi; 3893 messenger = null; 3894 mBinder = null; 3895 mPid = getCallingPid(); 3896 mUid = getCallingUid(); 3897 enforceRequestCountLimit(); 3898 } 3899 3900 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 3901 super(); 3902 messenger = m; 3903 request = r; 3904 ensureNetworkRequestHasType(request); 3905 mBinder = binder; 3906 mPid = getCallingPid(); 3907 mUid = getCallingUid(); 3908 mPendingIntent = null; 3909 enforceRequestCountLimit(); 3910 3911 try { 3912 mBinder.linkToDeath(this, 0); 3913 } catch (RemoteException e) { 3914 binderDied(); 3915 } 3916 } 3917 3918 private void enforceRequestCountLimit() { 3919 synchronized (mUidToNetworkRequestCount) { 3920 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 3921 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 3922 throw new IllegalArgumentException("Too many NetworkRequests filed"); 3923 } 3924 mUidToNetworkRequestCount.put(mUid, networkRequests); 3925 } 3926 } 3927 3928 void unlinkDeathRecipient() { 3929 if (mBinder != null) { 3930 mBinder.unlinkToDeath(this, 0); 3931 } 3932 } 3933 3934 public void binderDied() { 3935 log("ConnectivityService NetworkRequestInfo binderDied(" + 3936 request + ", " + mBinder + ")"); 3937 releaseNetworkRequest(request); 3938 } 3939 3940 public String toString() { 3941 return "uid/pid:" + mUid + "/" + mPid + " " + request + 3942 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3943 } 3944 } 3945 3946 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3947 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3948 if (badCapability != null) { 3949 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3950 } 3951 } 3952 3953 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3954 final SortedSet<Integer> thresholds = new TreeSet(); 3955 synchronized (nai) { 3956 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3957 if (nri.request.networkCapabilities.hasSignalStrength() && 3958 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3959 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3960 } 3961 } 3962 } 3963 return new ArrayList<Integer>(thresholds); 3964 } 3965 3966 private void updateSignalStrengthThresholds( 3967 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3968 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3969 Bundle thresholds = new Bundle(); 3970 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3971 3972 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 3973 String detail; 3974 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3975 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3976 } else { 3977 detail = reason; 3978 } 3979 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3980 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3981 } 3982 3983 nai.asyncChannel.sendMessage( 3984 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3985 0, 0, thresholds); 3986 } 3987 3988 @Override 3989 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3990 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3991 final NetworkRequest.Type type = (networkCapabilities == null) 3992 ? NetworkRequest.Type.TRACK_DEFAULT 3993 : NetworkRequest.Type.REQUEST; 3994 // If the requested networkCapabilities is null, take them instead from 3995 // the default network request. This allows callers to keep track of 3996 // the system default network. 3997 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 3998 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 3999 enforceAccessPermission(); 4000 } else { 4001 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4002 enforceNetworkRequestPermissions(networkCapabilities); 4003 // TODO: this is incorrect. We mark the request as metered or not depending on the state 4004 // of the app when the request is filed, but we never change the request if the app 4005 // changes network state. http://b/29964605 4006 enforceMeteredApnPolicy(networkCapabilities); 4007 } 4008 ensureRequestableCapabilities(networkCapabilities); 4009 4010 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 4011 throw new IllegalArgumentException("Bad timeout specified"); 4012 } 4013 4014 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 4015 .equals(networkCapabilities.getNetworkSpecifier())) { 4016 throw new IllegalArgumentException("Invalid network specifier - must not be '" 4017 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 4018 } 4019 4020 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4021 nextNetworkRequestId(), type); 4022 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4023 if (DBG) log("requestNetwork for " + nri); 4024 4025 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4026 if (timeoutMs > 0) { 4027 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4028 nri), timeoutMs); 4029 } 4030 return networkRequest; 4031 } 4032 4033 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4034 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4035 enforceConnectivityRestrictedNetworksPermission(); 4036 } else { 4037 enforceChangePermission(); 4038 } 4039 } 4040 4041 @Override 4042 public boolean requestBandwidthUpdate(Network network) { 4043 enforceAccessPermission(); 4044 NetworkAgentInfo nai = null; 4045 if (network == null) { 4046 return false; 4047 } 4048 synchronized (mNetworkForNetId) { 4049 nai = mNetworkForNetId.get(network.netId); 4050 } 4051 if (nai != null) { 4052 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4053 return true; 4054 } 4055 return false; 4056 } 4057 4058 private boolean isSystem(int uid) { 4059 return uid < Process.FIRST_APPLICATION_UID; 4060 } 4061 4062 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4063 final int uid = Binder.getCallingUid(); 4064 if (isSystem(uid)) { 4065 return; 4066 } 4067 // if UID is restricted, don't allow them to bring up metered APNs 4068 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 4069 final int uidRules; 4070 synchronized(mRulesLock) { 4071 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 4072 } 4073 if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 4074 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { 4075 // we could silently fail or we can filter the available nets to only give 4076 // them those they have access to. Chose the more useful option. 4077 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4078 } 4079 } 4080 } 4081 4082 @Override 4083 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4084 PendingIntent operation) { 4085 checkNotNull(operation, "PendingIntent cannot be null."); 4086 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4087 enforceNetworkRequestPermissions(networkCapabilities); 4088 enforceMeteredApnPolicy(networkCapabilities); 4089 ensureRequestableCapabilities(networkCapabilities); 4090 4091 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4092 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4093 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4094 if (DBG) log("pendingRequest for " + nri); 4095 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4096 nri)); 4097 return networkRequest; 4098 } 4099 4100 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4101 mHandler.sendMessageDelayed( 4102 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4103 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4104 } 4105 4106 @Override 4107 public void releasePendingNetworkRequest(PendingIntent operation) { 4108 checkNotNull(operation, "PendingIntent cannot be null."); 4109 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4110 getCallingUid(), 0, operation)); 4111 } 4112 4113 // In order to implement the compatibility measure for pre-M apps that call 4114 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4115 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4116 // This ensures it has permission to do so. 4117 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4118 if (nc == null) { 4119 return false; 4120 } 4121 int[] transportTypes = nc.getTransportTypes(); 4122 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4123 return false; 4124 } 4125 try { 4126 mContext.enforceCallingOrSelfPermission( 4127 android.Manifest.permission.ACCESS_WIFI_STATE, 4128 "ConnectivityService"); 4129 } catch (SecurityException e) { 4130 return false; 4131 } 4132 return true; 4133 } 4134 4135 @Override 4136 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4137 Messenger messenger, IBinder binder) { 4138 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4139 enforceAccessPermission(); 4140 } 4141 4142 NetworkRequest networkRequest = new NetworkRequest( 4143 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4144 NetworkRequest.Type.LISTEN); 4145 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4146 if (VDBG) log("listenForNetwork for " + nri); 4147 4148 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4149 return networkRequest; 4150 } 4151 4152 @Override 4153 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4154 PendingIntent operation) { 4155 checkNotNull(operation, "PendingIntent cannot be null."); 4156 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4157 enforceAccessPermission(); 4158 } 4159 4160 NetworkRequest networkRequest = new NetworkRequest( 4161 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4162 NetworkRequest.Type.LISTEN); 4163 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4164 if (VDBG) log("pendingListenForNetwork for " + nri); 4165 4166 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4167 } 4168 4169 @Override 4170 public void requestLinkProperties(NetworkRequest networkRequest) { 4171 ensureNetworkRequestHasType(networkRequest); 4172 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4173 mHandler.sendMessage(mHandler.obtainMessage( 4174 EVENT_REQUEST_LINKPROPERTIES, getCallingUid(), 0, networkRequest)); 4175 } 4176 4177 @Override 4178 public void requestNetworkCapabilities(NetworkRequest networkRequest) { 4179 ensureNetworkRequestHasType(networkRequest); 4180 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4181 mHandler.sendMessage(mHandler.obtainMessage( 4182 EVENT_REQUEST_NETCAPABILITIES, getCallingUid(), 0, networkRequest)); 4183 } 4184 4185 @Override 4186 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4187 ensureNetworkRequestHasType(networkRequest); 4188 mHandler.sendMessage(mHandler.obtainMessage( 4189 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4190 } 4191 4192 @Override 4193 public void registerNetworkFactory(Messenger messenger, String name) { 4194 enforceConnectivityInternalPermission(); 4195 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4196 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4197 } 4198 4199 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4200 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4201 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4202 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4203 } 4204 4205 @Override 4206 public void unregisterNetworkFactory(Messenger messenger) { 4207 enforceConnectivityInternalPermission(); 4208 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4209 } 4210 4211 private void handleUnregisterNetworkFactory(Messenger messenger) { 4212 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4213 if (nfi == null) { 4214 loge("Failed to find Messenger in unregisterNetworkFactory"); 4215 return; 4216 } 4217 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4218 } 4219 4220 /** 4221 * NetworkAgentInfo supporting a request by requestId. 4222 * These have already been vetted (their Capabilities satisfy the request) 4223 * and the are the highest scored network available. 4224 * the are keyed off the Requests requestId. 4225 */ 4226 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4227 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4228 new SparseArray<NetworkAgentInfo>(); 4229 4230 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4231 @GuardedBy("mNetworkForNetId") 4232 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4233 new SparseArray<NetworkAgentInfo>(); 4234 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4235 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4236 // there may not be a strict 1:1 correlation between the two. 4237 @GuardedBy("mNetworkForNetId") 4238 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4239 4240 // NetworkAgentInfo keyed off its connecting messenger 4241 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4242 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4243 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4244 new HashMap<Messenger, NetworkAgentInfo>(); 4245 4246 @GuardedBy("mBlockedAppUids") 4247 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4248 4249 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4250 private final NetworkRequest mDefaultRequest; 4251 4252 // Request used to optionally keep mobile data active even when higher 4253 // priority networks like Wi-Fi are active. 4254 private final NetworkRequest mDefaultMobileDataRequest; 4255 4256 private NetworkAgentInfo getDefaultNetwork() { 4257 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4258 } 4259 4260 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4261 return nai == getDefaultNetwork(); 4262 } 4263 4264 private boolean isDefaultRequest(NetworkRequestInfo nri) { 4265 return nri.request.requestId == mDefaultRequest.requestId; 4266 } 4267 4268 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4269 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4270 int currentScore, NetworkMisc networkMisc) { 4271 enforceConnectivityInternalPermission(); 4272 4273 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4274 // satisfies mDefaultRequest. 4275 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4276 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4277 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4278 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4279 synchronized (this) { 4280 nai.networkMonitor.systemReady = mSystemReady; 4281 } 4282 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, 4283 networkInfo.getExtraInfo()); 4284 if (DBG) log("registerNetworkAgent " + nai); 4285 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4286 return nai.network.netId; 4287 } 4288 4289 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4290 if (VDBG) log("Got NetworkAgent Messenger"); 4291 mNetworkAgentInfos.put(na.messenger, na); 4292 synchronized (mNetworkForNetId) { 4293 mNetworkForNetId.put(na.network.netId, na); 4294 } 4295 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4296 NetworkInfo networkInfo = na.networkInfo; 4297 na.networkInfo = null; 4298 updateNetworkInfo(na, networkInfo); 4299 } 4300 4301 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4302 LinkProperties newLp = networkAgent.linkProperties; 4303 int netId = networkAgent.network.netId; 4304 4305 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4306 // we do anything else, make sure its LinkProperties are accurate. 4307 if (networkAgent.clatd != null) { 4308 networkAgent.clatd.fixupLinkProperties(oldLp); 4309 } 4310 4311 updateInterfaces(newLp, oldLp, netId); 4312 updateMtu(newLp, oldLp); 4313 // TODO - figure out what to do for clat 4314// for (LinkProperties lp : newLp.getStackedLinks()) { 4315// updateMtu(lp, null); 4316// } 4317 updateTcpBufferSizes(networkAgent); 4318 4319 updateRoutes(newLp, oldLp, netId); 4320 updateDnses(newLp, oldLp, netId); 4321 4322 updateClat(newLp, oldLp, networkAgent); 4323 if (isDefaultNetwork(networkAgent)) { 4324 handleApplyDefaultProxy(newLp.getHttpProxy()); 4325 } else { 4326 updateProxy(newLp, oldLp, networkAgent); 4327 } 4328 // TODO - move this check to cover the whole function 4329 if (!Objects.equals(newLp, oldLp)) { 4330 notifyIfacesChangedForNetworkStats(); 4331 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4332 } 4333 4334 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4335 } 4336 4337 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4338 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4339 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4340 4341 if (!wasRunningClat && shouldRunClat) { 4342 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4343 nai.clatd.start(); 4344 } else if (wasRunningClat && !shouldRunClat) { 4345 nai.clatd.stop(); 4346 } 4347 } 4348 4349 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4350 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4351 if (oldLp != null) { 4352 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4353 } else if (newLp != null) { 4354 interfaceDiff.added = newLp.getAllInterfaceNames(); 4355 } 4356 for (String iface : interfaceDiff.added) { 4357 try { 4358 if (DBG) log("Adding iface " + iface + " to network " + netId); 4359 mNetd.addInterfaceToNetwork(iface, netId); 4360 } catch (Exception e) { 4361 loge("Exception adding interface: " + e); 4362 } 4363 } 4364 for (String iface : interfaceDiff.removed) { 4365 try { 4366 if (DBG) log("Removing iface " + iface + " from network " + netId); 4367 mNetd.removeInterfaceFromNetwork(iface, netId); 4368 } catch (Exception e) { 4369 loge("Exception removing interface: " + e); 4370 } 4371 } 4372 } 4373 4374 /** 4375 * Have netd update routes from oldLp to newLp. 4376 * @return true if routes changed between oldLp and newLp 4377 */ 4378 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4379 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4380 if (oldLp != null) { 4381 routeDiff = oldLp.compareAllRoutes(newLp); 4382 } else if (newLp != null) { 4383 routeDiff.added = newLp.getAllRoutes(); 4384 } 4385 4386 // add routes before removing old in case it helps with continuous connectivity 4387 4388 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4389 for (RouteInfo route : routeDiff.added) { 4390 if (route.hasGateway()) continue; 4391 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4392 try { 4393 mNetd.addRoute(netId, route); 4394 } catch (Exception e) { 4395 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4396 loge("Exception in addRoute for non-gateway: " + e); 4397 } 4398 } 4399 } 4400 for (RouteInfo route : routeDiff.added) { 4401 if (route.hasGateway() == false) continue; 4402 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4403 try { 4404 mNetd.addRoute(netId, route); 4405 } catch (Exception e) { 4406 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4407 loge("Exception in addRoute for gateway: " + e); 4408 } 4409 } 4410 } 4411 4412 for (RouteInfo route : routeDiff.removed) { 4413 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4414 try { 4415 mNetd.removeRoute(netId, route); 4416 } catch (Exception e) { 4417 loge("Exception in removeRoute: " + e); 4418 } 4419 } 4420 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4421 } 4422 4423 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4424 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4425 return; // no updating necessary 4426 } 4427 4428 Collection<InetAddress> dnses = newLp.getDnsServers(); 4429 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4430 try { 4431 mNetd.setDnsConfigurationForNetwork( 4432 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4433 } catch (Exception e) { 4434 loge("Exception in setDnsConfigurationForNetwork: " + e); 4435 } 4436 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4437 if (defaultNai != null && defaultNai.network.netId == netId) { 4438 setDefaultDnsSystemProperties(dnses); 4439 } 4440 flushVmDnsCache(); 4441 } 4442 4443 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4444 int last = 0; 4445 for (InetAddress dns : dnses) { 4446 ++last; 4447 String key = "net.dns" + last; 4448 String value = dns.getHostAddress(); 4449 SystemProperties.set(key, value); 4450 } 4451 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4452 String key = "net.dns" + i; 4453 SystemProperties.set(key, ""); 4454 } 4455 mNumDnsEntries = last; 4456 } 4457 4458 /** 4459 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4460 * augmented with any stateful capabilities implied from {@code networkAgent} 4461 * (e.g., validated status and captive portal status). 4462 * 4463 * @param oldScore score of the network before any of the changes that prompted us 4464 * to call this function. 4465 * @param nai the network having its capabilities updated. 4466 * @param networkCapabilities the new network capabilities. 4467 */ 4468 private void updateCapabilities( 4469 int oldScore, NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4470 // Don't modify caller's NetworkCapabilities. 4471 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4472 if (nai.lastValidated) { 4473 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4474 } else { 4475 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4476 } 4477 if (nai.lastCaptivePortalDetected) { 4478 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4479 } else { 4480 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4481 } 4482 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4483 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4484 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4485 try { 4486 mNetd.setNetworkPermission(nai.network.netId, 4487 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4488 null : NetworkManagementService.PERMISSION_SYSTEM); 4489 } catch (RemoteException e) { 4490 loge("Exception in setNetworkPermission: " + e); 4491 } 4492 } 4493 synchronized (nai) { 4494 nai.networkCapabilities = networkCapabilities; 4495 } 4496 rematchAllNetworksAndRequests(nai, oldScore); 4497 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4498 } 4499 } 4500 4501 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4502 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4503 NetworkRequest nr = nai.requestAt(i); 4504 // Don't send listening requests to factories. b/17393458 4505 if (nr.isListen()) continue; 4506 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4507 } 4508 } 4509 4510 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4511 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4512 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4513 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4514 networkRequest); 4515 } 4516 } 4517 4518 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4519 int notificationType) { 4520 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4521 Intent intent = new Intent(); 4522 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4523 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4524 nri.mPendingIntentSent = true; 4525 sendIntent(nri.mPendingIntent, intent); 4526 } 4527 // else not handled 4528 } 4529 4530 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4531 mPendingIntentWakeLock.acquire(); 4532 try { 4533 if (DBG) log("Sending " + pendingIntent); 4534 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4535 } catch (PendingIntent.CanceledException e) { 4536 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4537 mPendingIntentWakeLock.release(); 4538 releasePendingNetworkRequest(pendingIntent); 4539 } 4540 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4541 } 4542 4543 @Override 4544 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4545 String resultData, Bundle resultExtras) { 4546 if (DBG) log("Finished sending " + pendingIntent); 4547 mPendingIntentWakeLock.release(); 4548 // Release with a delay so the receiving client has an opportunity to put in its 4549 // own request. 4550 releasePendingNetworkRequestWithDelay(pendingIntent); 4551 } 4552 4553 private void callCallbackForRequest(NetworkRequestInfo nri, 4554 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 4555 if (nri.messenger == null) return; // Default request has no msgr 4556 Bundle bundle = new Bundle(); 4557 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4558 new NetworkRequest(nri.request)); 4559 Message msg = Message.obtain(); 4560 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4561 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4562 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4563 } 4564 switch (notificationType) { 4565 case ConnectivityManager.CALLBACK_LOSING: { 4566 msg.arg1 = arg1; 4567 break; 4568 } 4569 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4570 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4571 new NetworkCapabilities(networkAgent.networkCapabilities)); 4572 break; 4573 } 4574 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4575 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4576 new LinkProperties(networkAgent.linkProperties)); 4577 break; 4578 } 4579 } 4580 msg.what = notificationType; 4581 msg.setData(bundle); 4582 try { 4583 if (VDBG) { 4584 log("sending notification " + notifyTypeToName(notificationType) + 4585 " for " + nri.request); 4586 } 4587 nri.messenger.send(msg); 4588 } catch (RemoteException e) { 4589 // may occur naturally in the race of binder death. 4590 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4591 } 4592 } 4593 4594 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4595 if (nai.numRequestNetworkRequests() != 0) { 4596 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4597 NetworkRequest nr = nai.requestAt(i); 4598 // Ignore listening requests. 4599 if (nr.isListen()) continue; 4600 loge("Dead network still had at least " + nr); 4601 break; 4602 } 4603 } 4604 nai.asyncChannel.disconnect(); 4605 } 4606 4607 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4608 if (oldNetwork == null) { 4609 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4610 return; 4611 } 4612 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4613 4614 // If we get here it means that the last linger timeout for this network expired. So there 4615 // must be no other active linger timers, and we must stop lingering. 4616 oldNetwork.clearLingerState(); 4617 4618 if (unneeded(oldNetwork)) { 4619 teardownUnneededNetwork(oldNetwork); 4620 } 4621 } 4622 4623 private void makeDefault(NetworkAgentInfo newNetwork) { 4624 if (DBG) log("Switching to new default network: " + newNetwork); 4625 setupDataActivityTracking(newNetwork); 4626 try { 4627 mNetd.setDefaultNetId(newNetwork.network.netId); 4628 } catch (Exception e) { 4629 loge("Exception setting default network :" + e); 4630 } 4631 notifyLockdownVpn(newNetwork); 4632 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4633 updateTcpBufferSizes(newNetwork); 4634 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4635 } 4636 4637 // Handles a network appearing or improving its score. 4638 // 4639 // - Evaluates all current NetworkRequests that can be 4640 // satisfied by newNetwork, and reassigns to newNetwork 4641 // any such requests for which newNetwork is the best. 4642 // 4643 // - Lingers any validated Networks that as a result are no longer 4644 // needed. A network is needed if it is the best network for 4645 // one or more NetworkRequests, or if it is a VPN. 4646 // 4647 // - Tears down newNetwork if it just became validated 4648 // but turns out to be unneeded. 4649 // 4650 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4651 // networks that have no chance (i.e. even if validated) 4652 // of becoming the highest scoring network. 4653 // 4654 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4655 // it does not remove NetworkRequests that other Networks could better satisfy. 4656 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4657 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4658 // as it performs better by a factor of the number of Networks. 4659 // 4660 // @param newNetwork is the network to be matched against NetworkRequests. 4661 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4662 // performed to tear down unvalidated networks that have no chance (i.e. even if 4663 // validated) of becoming the highest scoring network. 4664 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4665 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 4666 if (!newNetwork.everConnected) return; 4667 boolean keep = newNetwork.isVPN(); 4668 boolean isNewDefault = false; 4669 NetworkAgentInfo oldDefaultNetwork = null; 4670 if (VDBG) log("rematching " + newNetwork.name()); 4671 // Find and migrate to this Network any NetworkRequests for 4672 // which this network is now the best. 4673 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4674 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4675 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4676 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4677 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4678 final boolean satisfies = newNetwork.satisfies(nri.request); 4679 if (newNetwork == currentNetwork && satisfies) { 4680 if (VDBG) { 4681 log("Network " + newNetwork.name() + " was already satisfying" + 4682 " request " + nri.request.requestId + ". No change."); 4683 } 4684 keep = true; 4685 continue; 4686 } 4687 4688 // check if it satisfies the NetworkCapabilities 4689 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4690 if (satisfies) { 4691 if (nri.request.isListen()) { 4692 // This is not a request, it's a callback listener. 4693 // Add it to newNetwork regardless of score. 4694 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4695 continue; 4696 } 4697 4698 // next check if it's better than any current network we're using for 4699 // this request 4700 if (VDBG) { 4701 log("currentScore = " + 4702 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4703 ", newScore = " + newNetwork.getCurrentScore()); 4704 } 4705 if (currentNetwork == null || 4706 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4707 if (VDBG) log("rematch for " + newNetwork.name()); 4708 if (currentNetwork != null) { 4709 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4710 currentNetwork.removeRequest(nri.request.requestId); 4711 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 4712 affectedNetworks.add(currentNetwork); 4713 } else { 4714 if (VDBG) log(" accepting network in place of null"); 4715 } 4716 newNetwork.unlingerRequest(nri.request); 4717 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4718 if (!newNetwork.addRequest(nri.request)) { 4719 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4720 } 4721 addedRequests.add(nri); 4722 keep = true; 4723 // Tell NetworkFactories about the new score, so they can stop 4724 // trying to connect if they know they cannot match it. 4725 // TODO - this could get expensive if we have alot of requests for this 4726 // network. Think about if there is a way to reduce this. Push 4727 // netid->request mapping to each factory? 4728 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4729 if (isDefaultRequest(nri)) { 4730 isNewDefault = true; 4731 oldDefaultNetwork = currentNetwork; 4732 if (currentNetwork != null) { 4733 mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork); 4734 } 4735 } 4736 } 4737 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 4738 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4739 // mark it as no longer satisfying "nri". Because networks are processed by 4740 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4741 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4742 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4743 // This means this code doesn't have to handle the case where "currentNetwork" no 4744 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4745 if (DBG) { 4746 log("Network " + newNetwork.name() + " stopped satisfying" + 4747 " request " + nri.request.requestId); 4748 } 4749 newNetwork.removeRequest(nri.request.requestId); 4750 if (currentNetwork == newNetwork) { 4751 mNetworkForRequestId.remove(nri.request.requestId); 4752 sendUpdatedScoreToFactories(nri.request, 0); 4753 } else { 4754 if (nri.request.isRequest()) { 4755 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4756 newNetwork.name() + 4757 " without updating mNetworkForRequestId or factories!"); 4758 } 4759 } 4760 // TODO: technically, sending CALLBACK_LOST here is 4761 // incorrect if nri is a request (not a listen) and there 4762 // is a replacement network currently connected that can 4763 // satisfy it. However, the only capability that can both 4764 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4765 // so this code is only incorrect for a network that loses 4766 // the TRUSTED capability, which is a rare case. 4767 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 4768 } 4769 } 4770 if (isNewDefault) { 4771 // Notify system services that this network is up. 4772 makeDefault(newNetwork); 4773 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 4774 logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); 4775 synchronized (ConnectivityService.this) { 4776 // have a new default network, release the transition wakelock in 4777 // a second if it's held. The second pause is to allow apps 4778 // to reconnect over the new network 4779 if (mNetTransitionWakeLock.isHeld()) { 4780 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4781 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4782 mNetTransitionWakeLockSerialNumber, 0), 4783 1000); 4784 } 4785 } 4786 } 4787 4788 // do this after the default net is switched, but 4789 // before LegacyTypeTracker sends legacy broadcasts 4790 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4791 4792 // Linger any networks that are no longer needed. This should be done after sending the 4793 // available callback for newNetwork. 4794 for (NetworkAgentInfo nai : affectedNetworks) { 4795 updateLingerState(nai, now); 4796 } 4797 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 4798 // does not need to be done in any particular order. 4799 updateLingerState(newNetwork, now); 4800 4801 if (isNewDefault) { 4802 // Maintain the illusion: since the legacy API only 4803 // understands one network at a time, we must pretend 4804 // that the current default network disconnected before 4805 // the new one connected. 4806 if (oldDefaultNetwork != null) { 4807 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4808 oldDefaultNetwork, true); 4809 } 4810 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4811 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4812 notifyLockdownVpn(newNetwork); 4813 } 4814 4815 if (keep) { 4816 // Notify battery stats service about this network, both the normal 4817 // interface and any stacked links. 4818 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4819 try { 4820 final IBatteryStats bs = BatteryStatsService.getService(); 4821 final int type = newNetwork.networkInfo.getType(); 4822 4823 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4824 bs.noteNetworkInterfaceType(baseIface, type); 4825 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4826 final String stackedIface = stacked.getInterfaceName(); 4827 bs.noteNetworkInterfaceType(stackedIface, type); 4828 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4829 } 4830 } catch (RemoteException ignored) { 4831 } 4832 4833 // This has to happen after the notifyNetworkCallbacks as that tickles each 4834 // ConnectivityManager instance so that legacy requests correctly bind dns 4835 // requests to this network. The legacy users are listening for this bcast 4836 // and will generally do a dns request so they can ensureRouteToHost and if 4837 // they do that before the callbacks happen they'll use the default network. 4838 // 4839 // TODO: Is there still a race here? We send the broadcast 4840 // after sending the callback, but if the app can receive the 4841 // broadcast before the callback, it might still break. 4842 // 4843 // This *does* introduce a race where if the user uses the new api 4844 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4845 // they may get old info. Reverse this after the old startUsing api is removed. 4846 // This is on top of the multiple intent sequencing referenced in the todo above. 4847 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 4848 NetworkRequest nr = newNetwork.requestAt(i); 4849 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 4850 // legacy type tracker filters out repeat adds 4851 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4852 } 4853 } 4854 4855 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4856 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4857 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4858 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4859 if (newNetwork.isVPN()) { 4860 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4861 } 4862 } 4863 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4864 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4865 if (unneeded(nai)) { 4866 if (nai.getLingerExpiry() > 0) { 4867 // This network has active linger timers and no requests, but is not 4868 // lingering. Linger it. 4869 // 4870 // One way (the only way?) this can happen if this network is unvalidated 4871 // and became unneeded due to another network improving its score to the 4872 // point where this network will no longer be able to satisfy any requests 4873 // even if it validates. 4874 updateLingerState(nai, now); 4875 } else { 4876 if (DBG) log("Reaping " + nai.name()); 4877 teardownUnneededNetwork(nai); 4878 } 4879 } 4880 } 4881 } 4882 } 4883 4884 /** 4885 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4886 * being disconnected. 4887 * @param changed If only one Network's score or capabilities have been modified since the last 4888 * time this function was called, pass this Network in this argument, otherwise pass 4889 * null. 4890 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4891 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4892 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4893 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4894 * network's score. 4895 */ 4896 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4897 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4898 // to avoid the slowness. It is not simply enough to process just "changed", for 4899 // example in the case where "changed"'s score decreases and another network should begin 4900 // satifying a NetworkRequest that "changed" currently satisfies. 4901 4902 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4903 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4904 // rematchNetworkAndRequests() handles. 4905 final long now = SystemClock.elapsedRealtime(); 4906 if (changed != null && oldScore < changed.getCurrentScore()) { 4907 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 4908 } else { 4909 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4910 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4911 // Rematch higher scoring networks first to prevent requests first matching a lower 4912 // scoring network and then a higher scoring network, which could produce multiple 4913 // callbacks and inadvertently unlinger networks. 4914 Arrays.sort(nais); 4915 for (NetworkAgentInfo nai : nais) { 4916 rematchNetworkAndRequests(nai, 4917 // Only reap the last time through the loop. Reaping before all rematching 4918 // is complete could incorrectly teardown a network that hasn't yet been 4919 // rematched. 4920 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4921 : ReapUnvalidatedNetworks.REAP, 4922 now); 4923 } 4924 } 4925 } 4926 4927 private void updateInetCondition(NetworkAgentInfo nai) { 4928 // Don't bother updating until we've graduated to validated at least once. 4929 if (!nai.everValidated) return; 4930 // For now only update icons for default connection. 4931 // TODO: Update WiFi and cellular icons separately. b/17237507 4932 if (!isDefaultNetwork(nai)) return; 4933 4934 int newInetCondition = nai.lastValidated ? 100 : 0; 4935 // Don't repeat publish. 4936 if (newInetCondition == mDefaultInetConditionPublished) return; 4937 4938 mDefaultInetConditionPublished = newInetCondition; 4939 sendInetConditionBroadcast(nai.networkInfo); 4940 } 4941 4942 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4943 if (mLockdownTracker != null) { 4944 if (nai != null && nai.isVPN()) { 4945 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4946 } else { 4947 mLockdownTracker.onNetworkInfoChanged(); 4948 } 4949 } 4950 } 4951 4952 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4953 NetworkInfo.State state = newInfo.getState(); 4954 NetworkInfo oldInfo = null; 4955 final int oldScore = networkAgent.getCurrentScore(); 4956 synchronized (networkAgent) { 4957 oldInfo = networkAgent.networkInfo; 4958 networkAgent.networkInfo = newInfo; 4959 } 4960 notifyLockdownVpn(networkAgent); 4961 4962 if (oldInfo != null && oldInfo.getState() == state) { 4963 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 4964 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 4965 notifyIfacesChangedForNetworkStats(); 4966 } else if (VDBG) log("ignoring duplicate network state non-change"); 4967 // In either case, no further work should be needed. 4968 return; 4969 } 4970 if (DBG) { 4971 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4972 (oldInfo == null ? "null" : oldInfo.getState()) + 4973 " to " + state); 4974 } 4975 4976 if (!networkAgent.created 4977 && (state == NetworkInfo.State.CONNECTED 4978 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 4979 try { 4980 // This should never fail. Specifying an already in use NetID will cause failure. 4981 if (networkAgent.isVPN()) { 4982 mNetd.createVirtualNetwork(networkAgent.network.netId, 4983 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4984 (networkAgent.networkMisc == null || 4985 !networkAgent.networkMisc.allowBypass)); 4986 } else { 4987 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4988 networkAgent.networkCapabilities.hasCapability( 4989 NET_CAPABILITY_NOT_RESTRICTED) ? 4990 null : NetworkManagementService.PERMISSION_SYSTEM); 4991 } 4992 } catch (Exception e) { 4993 loge("Error creating network " + networkAgent.network.netId + ": " 4994 + e.getMessage()); 4995 return; 4996 } 4997 networkAgent.created = true; 4998 } 4999 5000 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 5001 networkAgent.everConnected = true; 5002 5003 updateLinkProperties(networkAgent, null); 5004 notifyIfacesChangedForNetworkStats(); 5005 5006 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 5007 scheduleUnvalidatedPrompt(networkAgent); 5008 5009 if (networkAgent.isVPN()) { 5010 // Temporarily disable the default proxy (not global). 5011 synchronized (mProxyLock) { 5012 if (!mDefaultProxyDisabled) { 5013 mDefaultProxyDisabled = true; 5014 if (mGlobalProxy == null && mDefaultProxy != null) { 5015 sendProxyBroadcast(null); 5016 } 5017 } 5018 } 5019 // TODO: support proxy per network. 5020 } 5021 5022 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5023 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5024 // capabilities, so it only needs to be done once on initial connect, not every time the 5025 // network's capabilities change. Note that we do this before rematching the network, 5026 // so we could decide to tear it down immediately afterwards. That's fine though - on 5027 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5028 // doing. 5029 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5030 5031 // Consider network even though it is not yet validated. 5032 final long now = SystemClock.elapsedRealtime(); 5033 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5034 5035 // This has to happen after matching the requests, because callbacks are just requests. 5036 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5037 } else if (state == NetworkInfo.State.DISCONNECTED) { 5038 networkAgent.asyncChannel.disconnect(); 5039 if (networkAgent.isVPN()) { 5040 synchronized (mProxyLock) { 5041 if (mDefaultProxyDisabled) { 5042 mDefaultProxyDisabled = false; 5043 if (mGlobalProxy == null && mDefaultProxy != null) { 5044 sendProxyBroadcast(mDefaultProxy); 5045 } 5046 } 5047 } 5048 } 5049 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5050 state == NetworkInfo.State.SUSPENDED) { 5051 // going into or coming out of SUSPEND: rescore and notify 5052 if (networkAgent.getCurrentScore() != oldScore) { 5053 rematchAllNetworksAndRequests(networkAgent, oldScore); 5054 } 5055 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5056 ConnectivityManager.CALLBACK_SUSPENDED : 5057 ConnectivityManager.CALLBACK_RESUMED)); 5058 mLegacyTypeTracker.update(networkAgent); 5059 } 5060 } 5061 5062 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5063 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5064 if (score < 0) { 5065 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5066 "). Bumping score to min of 0"); 5067 score = 0; 5068 } 5069 5070 final int oldScore = nai.getCurrentScore(); 5071 nai.setCurrentScore(score); 5072 5073 rematchAllNetworksAndRequests(nai, oldScore); 5074 5075 sendUpdatedScoreToFactories(nai); 5076 } 5077 5078 // notify only this one new request of the current state 5079 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5080 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 5081 if (nri.mPendingIntent == null) { 5082 callCallbackForRequest(nri, nai, notifyType, 0); 5083 } else { 5084 sendPendingIntentForRequest(nri, nai, notifyType); 5085 } 5086 } 5087 5088 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5089 // The NetworkInfo we actually send out has no bearing on the real 5090 // state of affairs. For example, if the default connection is mobile, 5091 // and a request for HIPRI has just gone away, we need to pretend that 5092 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5093 // the state to DISCONNECTED, even though the network is of type MOBILE 5094 // and is still connected. 5095 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5096 info.setType(type); 5097 if (state != DetailedState.DISCONNECTED) { 5098 info.setDetailedState(state, null, info.getExtraInfo()); 5099 sendConnectedBroadcast(info); 5100 } else { 5101 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5102 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5103 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5104 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5105 if (info.isFailover()) { 5106 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5107 nai.networkInfo.setFailover(false); 5108 } 5109 if (info.getReason() != null) { 5110 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5111 } 5112 if (info.getExtraInfo() != null) { 5113 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5114 } 5115 NetworkAgentInfo newDefaultAgent = null; 5116 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5117 newDefaultAgent = getDefaultNetwork(); 5118 if (newDefaultAgent != null) { 5119 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5120 newDefaultAgent.networkInfo); 5121 } else { 5122 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5123 } 5124 } 5125 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5126 mDefaultInetConditionPublished); 5127 sendStickyBroadcast(intent); 5128 if (newDefaultAgent != null) { 5129 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5130 } 5131 } 5132 } 5133 5134 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5135 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5136 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5137 NetworkRequest nr = networkAgent.requestAt(i); 5138 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5139 if (VDBG) log(" sending notification for " + nr); 5140 if (nri.mPendingIntent == null) { 5141 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5142 } else { 5143 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5144 } 5145 } 5146 } 5147 5148 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5149 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5150 } 5151 5152 private String notifyTypeToName(int notifyType) { 5153 switch (notifyType) { 5154 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5155 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5156 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5157 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5158 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5159 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5160 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5161 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5162 } 5163 return "UNKNOWN"; 5164 } 5165 5166 /** 5167 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5168 * properties tracked by NetworkStatsService on an active iface has changed. 5169 */ 5170 private void notifyIfacesChangedForNetworkStats() { 5171 try { 5172 mStatsService.forceUpdateIfaces(); 5173 } catch (Exception ignored) { 5174 } 5175 } 5176 5177 @Override 5178 public boolean addVpnAddress(String address, int prefixLength) { 5179 throwIfLockdownEnabled(); 5180 int user = UserHandle.getUserId(Binder.getCallingUid()); 5181 synchronized (mVpns) { 5182 return mVpns.get(user).addAddress(address, prefixLength); 5183 } 5184 } 5185 5186 @Override 5187 public boolean removeVpnAddress(String address, int prefixLength) { 5188 throwIfLockdownEnabled(); 5189 int user = UserHandle.getUserId(Binder.getCallingUid()); 5190 synchronized (mVpns) { 5191 return mVpns.get(user).removeAddress(address, prefixLength); 5192 } 5193 } 5194 5195 @Override 5196 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5197 throwIfLockdownEnabled(); 5198 int user = UserHandle.getUserId(Binder.getCallingUid()); 5199 boolean success; 5200 synchronized (mVpns) { 5201 success = mVpns.get(user).setUnderlyingNetworks(networks); 5202 } 5203 if (success) { 5204 notifyIfacesChangedForNetworkStats(); 5205 } 5206 return success; 5207 } 5208 5209 @Override 5210 public String getCaptivePortalServerUrl() { 5211 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5212 } 5213 5214 @Override 5215 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5216 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5217 enforceKeepalivePermission(); 5218 mKeepaliveTracker.startNattKeepalive( 5219 getNetworkAgentInfoForNetwork(network), 5220 intervalSeconds, messenger, binder, 5221 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5222 } 5223 5224 @Override 5225 public void stopKeepalive(Network network, int slot) { 5226 mHandler.sendMessage(mHandler.obtainMessage( 5227 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5228 } 5229 5230 @Override 5231 public void factoryReset() { 5232 enforceConnectivityInternalPermission(); 5233 5234 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5235 return; 5236 } 5237 5238 final int userId = UserHandle.getCallingUserId(); 5239 5240 // Turn airplane mode off 5241 setAirplaneMode(false); 5242 5243 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5244 // Untether 5245 for (String tether : getTetheredIfaces()) { 5246 untether(tether); 5247 } 5248 } 5249 5250 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5251 // Remove always-on package 5252 synchronized (mVpns) { 5253 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5254 if (alwaysOnPackage != null) { 5255 setAlwaysOnVpnPackage(userId, null, false); 5256 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5257 } 5258 } 5259 5260 // Turn VPN off 5261 VpnConfig vpnConfig = getVpnConfig(userId); 5262 if (vpnConfig != null) { 5263 if (vpnConfig.legacy) { 5264 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5265 } else { 5266 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5267 // in the future without user intervention. 5268 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5269 5270 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5271 } 5272 } 5273 } 5274 } 5275 5276 @VisibleForTesting 5277 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5278 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5279 return new NetworkMonitor(context, handler, nai, defaultRequest); 5280 } 5281 5282 @VisibleForTesting 5283 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5284 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5285 } 5286 5287 private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5288 int newNetid = NETID_UNSET; 5289 int prevNetid = NETID_UNSET; 5290 int[] transports = new int[0]; 5291 boolean hadIPv4 = false; 5292 boolean hadIPv6 = false; 5293 5294 if (newNai != null) { 5295 newNetid = newNai.network.netId; 5296 transports = newNai.networkCapabilities.getTransportTypes(); 5297 } 5298 if (prevNai != null) { 5299 prevNetid = prevNai.network.netId; 5300 final LinkProperties lp = prevNai.linkProperties; 5301 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5302 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5303 } 5304 5305 mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); 5306 } 5307 5308 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5309 mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); 5310 } 5311} 5312