1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_FOREGROUND; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 31import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 32import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 33import static android.net.NetworkPolicyManager.RULE_ALLOW_METERED; 34import static android.net.NetworkPolicyManager.RULE_NONE; 35import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 36import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 37import static android.net.NetworkPolicyManager.RULE_TEMPORARY_ALLOW_METERED; 38import static android.net.NetworkPolicyManager.uidRulesToString; 39 40import android.annotation.Nullable; 41import android.app.BroadcastOptions; 42import android.app.NotificationManager; 43import android.app.PendingIntent; 44import android.content.BroadcastReceiver; 45import android.content.ContentResolver; 46import android.content.Context; 47import android.content.Intent; 48import android.content.IntentFilter; 49import android.content.pm.PackageManager; 50import android.content.res.Configuration; 51import android.content.res.Resources; 52import android.database.ContentObserver; 53import android.net.ConnectivityManager; 54import android.net.ConnectivityManager.PacketKeepalive; 55import android.net.IConnectivityManager; 56import android.net.INetworkManagementEventObserver; 57import android.net.INetworkPolicyListener; 58import android.net.INetworkPolicyManager; 59import android.net.INetworkStatsService; 60import android.net.LinkProperties; 61import android.net.LinkProperties.CompareResult; 62import android.net.Network; 63import android.net.NetworkAgent; 64import android.net.NetworkCapabilities; 65import android.net.NetworkConfig; 66import android.net.NetworkInfo; 67import android.net.NetworkInfo.DetailedState; 68import android.net.NetworkMisc; 69import android.net.NetworkQuotaInfo; 70import android.net.NetworkRequest; 71import android.net.NetworkState; 72import android.net.NetworkUtils; 73import android.net.Proxy; 74import android.net.ProxyInfo; 75import android.net.RouteInfo; 76import android.net.UidRange; 77import android.net.Uri; 78import android.net.metrics.DefaultNetworkEvent; 79import android.net.metrics.IpConnectivityLog; 80import android.net.metrics.NetworkEvent; 81import android.net.util.AvoidBadWifiTracker; 82import android.os.Binder; 83import android.os.Build; 84import android.os.Bundle; 85import android.os.FileUtils; 86import android.os.Handler; 87import android.os.HandlerThread; 88import android.os.IBinder; 89import android.os.INetworkManagementService; 90import android.os.Looper; 91import android.os.Message; 92import android.os.Messenger; 93import android.os.ParcelFileDescriptor; 94import android.os.PowerManager; 95import android.os.Process; 96import android.os.RemoteException; 97import android.os.ResultReceiver; 98import android.os.SystemClock; 99import android.os.SystemProperties; 100import android.os.UserHandle; 101import android.os.UserManager; 102import android.provider.Settings; 103import android.security.Credentials; 104import android.security.KeyStore; 105import android.telephony.TelephonyManager; 106import android.text.TextUtils; 107import android.util.ArraySet; 108import android.util.LocalLog; 109import android.util.LocalLog.ReadOnlyLocalLog; 110import android.util.Log; 111import android.util.Pair; 112import android.util.Slog; 113import android.util.SparseArray; 114import android.util.SparseBooleanArray; 115import android.util.SparseIntArray; 116import android.util.Xml; 117 118import com.android.internal.R; 119import com.android.internal.annotations.GuardedBy; 120import com.android.internal.annotations.VisibleForTesting; 121import com.android.internal.app.IBatteryStats; 122import com.android.internal.net.LegacyVpnInfo; 123import com.android.internal.net.NetworkStatsFactory; 124import com.android.internal.net.VpnConfig; 125import com.android.internal.net.VpnInfo; 126import com.android.internal.net.VpnProfile; 127import com.android.internal.util.AsyncChannel; 128import com.android.internal.util.IndentingPrintWriter; 129import com.android.internal.util.MessageUtils; 130import com.android.internal.util.WakeupMessage; 131import com.android.internal.util.XmlUtils; 132import com.android.server.am.BatteryStatsService; 133import com.android.server.connectivity.DataConnectionStats; 134import com.android.server.connectivity.KeepaliveTracker; 135import com.android.server.connectivity.Nat464Xlat; 136import com.android.server.connectivity.LingerMonitor; 137import com.android.server.connectivity.NetworkAgentInfo; 138import com.android.server.connectivity.NetworkDiagnostics; 139import com.android.server.connectivity.NetworkMonitor; 140import com.android.server.connectivity.NetworkNotificationManager; 141import com.android.server.connectivity.NetworkNotificationManager.NotificationType; 142import com.android.server.connectivity.PacManager; 143import com.android.server.connectivity.PermissionMonitor; 144import com.android.server.connectivity.Tethering; 145import com.android.server.connectivity.Vpn; 146import com.android.server.net.BaseNetworkObserver; 147import com.android.server.net.LockdownVpnTracker; 148 149import com.google.android.collect.Lists; 150 151import org.xmlpull.v1.XmlPullParser; 152import org.xmlpull.v1.XmlPullParserException; 153 154import java.io.File; 155import java.io.FileDescriptor; 156import java.io.FileNotFoundException; 157import java.io.FileReader; 158import java.io.IOException; 159import java.io.PrintWriter; 160import java.net.Inet4Address; 161import java.net.InetAddress; 162import java.net.UnknownHostException; 163import java.util.ArrayDeque; 164import java.util.ArrayList; 165import java.util.Arrays; 166import java.util.Collection; 167import java.util.HashMap; 168import java.util.HashSet; 169import java.util.List; 170import java.util.Map; 171import java.util.Objects; 172import java.util.SortedSet; 173import java.util.TreeSet; 174 175/** 176 * @hide 177 */ 178public class ConnectivityService extends IConnectivityManager.Stub 179 implements PendingIntent.OnFinished { 180 private static final String TAG = ConnectivityService.class.getSimpleName(); 181 182 private static final boolean DBG = true; 183 private static final boolean VDBG = false; 184 185 private static final boolean LOGD_RULES = false; 186 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 187 188 // TODO: create better separation between radio types and network types 189 190 // how long to wait before switching back to a radio's default network 191 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 192 // system property that can override the above value 193 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 194 "android.telephony.apn-restore"; 195 196 // How long to wait before putting up a "This network doesn't have an Internet connection, 197 // connect anyway?" dialog after the user selects a network that doesn't validate. 198 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 199 200 // Default to 30s linger time-out. Modifiable only for testing. 201 private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; 202 private static final int DEFAULT_LINGER_DELAY_MS = 30_000; 203 @VisibleForTesting 204 protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it. 205 206 // How long to delay to removal of a pending intent based request. 207 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 208 private final int mReleasePendingIntentDelayMs; 209 210 private Tethering mTethering; 211 212 private final PermissionMonitor mPermissionMonitor; 213 214 private KeyStore mKeyStore; 215 216 @GuardedBy("mVpns") 217 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 218 219 private boolean mLockdownEnabled; 220 private LockdownVpnTracker mLockdownTracker; 221 222 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 223 private Object mRulesLock = new Object(); 224 /** Currently active network rules by UID. */ 225 @GuardedBy("mRulesLock") 226 private SparseIntArray mUidRules = new SparseIntArray(); 227 /** Set of ifaces that are costly. */ 228 @GuardedBy("mRulesLock") 229 private ArraySet<String> mMeteredIfaces = new ArraySet<>(); 230 /** Flag indicating if background data is restricted. */ 231 @GuardedBy("mRulesLock") 232 private boolean mRestrictBackground; 233 234 final private Context mContext; 235 private int mNetworkPreference; 236 // 0 is full bad, 100 is full good 237 private int mDefaultInetConditionPublished = 0; 238 239 private int mNumDnsEntries; 240 241 private boolean mTestMode; 242 private static ConnectivityService sServiceInstance; 243 244 private INetworkManagementService mNetd; 245 private INetworkStatsService mStatsService; 246 private INetworkPolicyManager mPolicyManager; 247 248 private String mCurrentTcpBufferSizes; 249 250 private static final int ENABLED = 1; 251 private static final int DISABLED = 0; 252 253 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 254 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class, 255 NetworkAgentInfo.class }); 256 257 private enum ReapUnvalidatedNetworks { 258 // Tear down networks that have no chance (e.g. even if validated) of becoming 259 // the highest scoring network satisfying a NetworkRequest. This should be passed when 260 // all networks have been rematched against all NetworkRequests. 261 REAP, 262 // Don't reap networks. This should be passed when some networks have not yet been 263 // rematched against all NetworkRequests. 264 DONT_REAP 265 }; 266 267 private enum UnneededFor { 268 LINGER, // Determine whether this network is unneeded and should be lingered. 269 TEARDOWN, // Determine whether this network is unneeded and should be torn down. 270 } 271 272 /** 273 * used internally to change our mobile data enabled flag 274 */ 275 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 276 277 /** 278 * used internally to clear a wakelock when transitioning 279 * from one net to another. Clear happens when we get a new 280 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 281 * after a timeout if no network is found (typically 1 min). 282 */ 283 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 284 285 /** 286 * used internally to reload global proxy settings 287 */ 288 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 289 290 /** 291 * PAC manager has received new port. 292 */ 293 private static final int EVENT_PROXY_HAS_CHANGED = 16; 294 295 /** 296 * used internally when registering NetworkFactories 297 * obj = NetworkFactoryInfo 298 */ 299 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 300 301 /** 302 * used internally when registering NetworkAgents 303 * obj = Messenger 304 */ 305 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 306 307 /** 308 * used to add a network request 309 * includes a NetworkRequestInfo 310 */ 311 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 312 313 /** 314 * indicates a timeout period is over - check if we had a network yet or not 315 * and if not, call the timeout callback (but leave the request live until they 316 * cancel it. 317 * includes a NetworkRequestInfo 318 */ 319 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 320 321 /** 322 * used to add a network listener - no request 323 * includes a NetworkRequestInfo 324 */ 325 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 326 327 /** 328 * used to remove a network request, either a listener or a real request 329 * arg1 = UID of caller 330 * obj = NetworkRequest 331 */ 332 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 333 334 /** 335 * used internally when registering NetworkFactories 336 * obj = Messenger 337 */ 338 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 339 340 /** 341 * used internally to expire a wakelock when transitioning 342 * from one net to another. Expire happens when we fail to find 343 * a new network (typically after 1 minute) - 344 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 345 * a replacement network. 346 */ 347 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 348 349 /** 350 * Used internally to indicate the system is ready. 351 */ 352 private static final int EVENT_SYSTEM_READY = 25; 353 354 /** 355 * used to add a network request with a pending intent 356 * obj = NetworkRequestInfo 357 */ 358 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 359 360 /** 361 * used to remove a pending intent and its associated network request. 362 * arg1 = UID of caller 363 * obj = PendingIntent 364 */ 365 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 366 367 /** 368 * used to specify whether a network should be used even if unvalidated. 369 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 370 * arg2 = whether to remember this choice in the future (1 or 0) 371 * obj = network 372 */ 373 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 374 375 /** 376 * used to specify whether a network should not be penalized when it becomes unvalidated. 377 */ 378 private static final int EVENT_SET_AVOID_UNVALIDATED = 35; 379 380 /** 381 * used to ask the user to confirm a connection to an unvalidated network. 382 * obj = network 383 */ 384 private static final int EVENT_PROMPT_UNVALIDATED = 29; 385 386 /** 387 * used internally to (re)configure mobile data always-on settings. 388 */ 389 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 390 391 /** 392 * used to add a network listener with a pending intent 393 * obj = NetworkRequestInfo 394 */ 395 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 396 397 /** 398 * Indicates a caller has requested to have its callback invoked with 399 * the latest LinkProperties or NetworkCapabilities. 400 * 401 * arg1 = UID of caller 402 * obj = NetworkRequest 403 */ 404 private static final int EVENT_REQUEST_LINKPROPERTIES = 32; 405 private static final int EVENT_REQUEST_NETCAPABILITIES = 33; 406 407 /** Handler thread used for both of the handlers below. */ 408 @VisibleForTesting 409 protected final HandlerThread mHandlerThread; 410 /** Handler used for internal events. */ 411 final private InternalHandler mHandler; 412 /** Handler used for incoming {@link NetworkStateTracker} events. */ 413 final private NetworkStateTrackerHandler mTrackerHandler; 414 415 private boolean mSystemReady; 416 private Intent mInitialBroadcast; 417 418 private PowerManager.WakeLock mNetTransitionWakeLock; 419 private String mNetTransitionWakeLockCausedBy = ""; 420 private int mNetTransitionWakeLockSerialNumber; 421 private int mNetTransitionWakeLockTimeout; 422 private final PowerManager.WakeLock mPendingIntentWakeLock; 423 424 // used in DBG mode to track inet condition reports 425 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 426 private ArrayList mInetLog; 427 428 // track the current default http proxy - tell the world if we get a new one (real change) 429 private volatile ProxyInfo mDefaultProxy = null; 430 private Object mProxyLock = new Object(); 431 private boolean mDefaultProxyDisabled = false; 432 433 // track the global proxy. 434 private ProxyInfo mGlobalProxy = null; 435 436 private PacManager mPacManager = null; 437 438 final private SettingsObserver mSettingsObserver; 439 440 private UserManager mUserManager; 441 442 NetworkConfig[] mNetConfigs; 443 int mNetworksDefined; 444 445 // the set of network types that can only be enabled by system/sig apps 446 List mProtectedNetworks; 447 448 private DataConnectionStats mDataConnectionStats; 449 450 TelephonyManager mTelephonyManager; 451 452 private KeepaliveTracker mKeepaliveTracker; 453 private NetworkNotificationManager mNotifier; 454 private LingerMonitor mLingerMonitor; 455 456 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 457 private final static int MIN_NET_ID = 100; // some reserved marks 458 private final static int MAX_NET_ID = 65535; 459 private int mNextNetId = MIN_NET_ID; 460 461 // sequence number of NetworkRequests 462 private int mNextNetworkRequestId = 1; 463 464 // NetworkRequest activity String log entries. 465 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 466 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 467 468 // NetworkInfo blocked and unblocked String log entries 469 // TODO: consider reducing memory usage. Each log line is ~40 2B chars, for a total of ~8kB. 470 private static final int MAX_NETWORK_INFO_LOGS = 100; 471 private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); 472 473 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 474 private static final int MAX_VALIDATION_LOGS = 10; 475 private static class ValidationLog { 476 final Network mNetwork; 477 final String mNetworkExtraInfo; 478 final ReadOnlyLocalLog mLog; 479 480 ValidationLog(Network network, String networkExtraInfo, ReadOnlyLocalLog log) { 481 mNetwork = network; 482 mNetworkExtraInfo = networkExtraInfo; 483 mLog = log; 484 } 485 } 486 private final ArrayDeque<ValidationLog> mValidationLogs = 487 new ArrayDeque<ValidationLog>(MAX_VALIDATION_LOGS); 488 489 private void addValidationLogs(ReadOnlyLocalLog log, Network network, String networkExtraInfo) { 490 synchronized(mValidationLogs) { 491 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 492 mValidationLogs.removeLast(); 493 } 494 mValidationLogs.addFirst(new ValidationLog(network, networkExtraInfo, log)); 495 } 496 } 497 498 private final IpConnectivityLog mMetricsLog; 499 500 @VisibleForTesting 501 final AvoidBadWifiTracker mAvoidBadWifiTracker; 502 503 /** 504 * Implements support for the legacy "one network per network type" model. 505 * 506 * We used to have a static array of NetworkStateTrackers, one for each 507 * network type, but that doesn't work any more now that we can have, 508 * for example, more that one wifi network. This class stores all the 509 * NetworkAgentInfo objects that support a given type, but the legacy 510 * API will only see the first one. 511 * 512 * It serves two main purposes: 513 * 514 * 1. Provide information about "the network for a given type" (since this 515 * API only supports one). 516 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 517 * the first network for a given type changes, or if the default network 518 * changes. 519 */ 520 private class LegacyTypeTracker { 521 522 private static final boolean DBG = true; 523 private static final boolean VDBG = false; 524 525 /** 526 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 527 * Each list holds references to all NetworkAgentInfos that are used to 528 * satisfy requests for that network type. 529 * 530 * This array is built out at startup such that an unsupported network 531 * doesn't get an ArrayList instance, making this a tristate: 532 * unsupported, supported but not active and active. 533 * 534 * The actual lists are populated when we scan the network types that 535 * are supported on this device. 536 * 537 * Threading model: 538 * - addSupportedType() is only called in the constructor 539 * - add(), update(), remove() are only called from the ConnectivityService handler thread. 540 * They are therefore not thread-safe with respect to each other. 541 * - getNetworkForType() can be called at any time on binder threads. It is synchronized 542 * on mTypeLists to be thread-safe with respect to a concurrent remove call. 543 * - dump is thread-safe with respect to concurrent add and remove calls. 544 */ 545 private final ArrayList<NetworkAgentInfo> mTypeLists[]; 546 547 public LegacyTypeTracker() { 548 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 549 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 550 } 551 552 public void addSupportedType(int type) { 553 if (mTypeLists[type] != null) { 554 throw new IllegalStateException( 555 "legacy list for type " + type + "already initialized"); 556 } 557 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 558 } 559 560 public boolean isTypeSupported(int type) { 561 return isNetworkTypeValid(type) && mTypeLists[type] != null; 562 } 563 564 public NetworkAgentInfo getNetworkForType(int type) { 565 synchronized (mTypeLists) { 566 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 567 return mTypeLists[type].get(0); 568 } 569 } 570 return null; 571 } 572 573 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 574 boolean isDefaultNetwork) { 575 if (DBG) { 576 log("Sending " + state + 577 " broadcast for type " + type + " " + nai.name() + 578 " isDefaultNetwork=" + isDefaultNetwork); 579 } 580 } 581 582 /** Adds the given network to the specified legacy type list. */ 583 public void add(int type, NetworkAgentInfo nai) { 584 if (!isTypeSupported(type)) { 585 return; // Invalid network type. 586 } 587 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 588 589 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 590 if (list.contains(nai)) { 591 return; 592 } 593 synchronized (mTypeLists) { 594 list.add(nai); 595 } 596 597 // Send a broadcast if this is the first network of its type or if it's the default. 598 final boolean isDefaultNetwork = isDefaultNetwork(nai); 599 if ((list.size() == 1) || isDefaultNetwork) { 600 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 601 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 602 } 603 } 604 605 /** Removes the given network from the specified legacy type list. */ 606 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 607 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 608 if (list == null || list.isEmpty()) { 609 return; 610 } 611 final boolean wasFirstNetwork = list.get(0).equals(nai); 612 613 synchronized (mTypeLists) { 614 if (!list.remove(nai)) { 615 return; 616 } 617 } 618 619 final DetailedState state = DetailedState.DISCONNECTED; 620 621 if (wasFirstNetwork || wasDefault) { 622 maybeLogBroadcast(nai, state, type, wasDefault); 623 sendLegacyNetworkBroadcast(nai, state, type); 624 } 625 626 if (!list.isEmpty() && wasFirstNetwork) { 627 if (DBG) log("Other network available for type " + type + 628 ", sending connected broadcast"); 629 final NetworkAgentInfo replacement = list.get(0); 630 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 631 sendLegacyNetworkBroadcast(replacement, state, type); 632 } 633 } 634 635 /** Removes the given network from all legacy type lists. */ 636 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 637 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 638 for (int type = 0; type < mTypeLists.length; type++) { 639 remove(type, nai, wasDefault); 640 } 641 } 642 643 // send out another legacy broadcast - currently only used for suspend/unsuspend 644 // toggle 645 public void update(NetworkAgentInfo nai) { 646 final boolean isDefault = isDefaultNetwork(nai); 647 final DetailedState state = nai.networkInfo.getDetailedState(); 648 for (int type = 0; type < mTypeLists.length; type++) { 649 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 650 final boolean contains = (list != null && list.contains(nai)); 651 final boolean isFirst = contains && (nai == list.get(0)); 652 if (isFirst || contains && isDefault) { 653 maybeLogBroadcast(nai, state, type, isDefault); 654 sendLegacyNetworkBroadcast(nai, state, type); 655 } 656 } 657 } 658 659 private String naiToString(NetworkAgentInfo nai) { 660 String name = (nai != null) ? nai.name() : "null"; 661 String state = (nai.networkInfo != null) ? 662 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 663 "???/???"; 664 return name + " " + state; 665 } 666 667 public void dump(IndentingPrintWriter pw) { 668 pw.println("mLegacyTypeTracker:"); 669 pw.increaseIndent(); 670 pw.print("Supported types:"); 671 for (int type = 0; type < mTypeLists.length; type++) { 672 if (mTypeLists[type] != null) pw.print(" " + type); 673 } 674 pw.println(); 675 pw.println("Current state:"); 676 pw.increaseIndent(); 677 synchronized (mTypeLists) { 678 for (int type = 0; type < mTypeLists.length; type++) { 679 if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; 680 for (NetworkAgentInfo nai : mTypeLists[type]) { 681 pw.println(type + " " + naiToString(nai)); 682 } 683 } 684 } 685 pw.decreaseIndent(); 686 pw.decreaseIndent(); 687 pw.println(); 688 } 689 } 690 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 691 692 @VisibleForTesting 693 protected HandlerThread createHandlerThread() { 694 return new HandlerThread("ConnectivityServiceThread"); 695 } 696 697 public ConnectivityService(Context context, INetworkManagementService netManager, 698 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 699 this(context, netManager, statsService, policyManager, new IpConnectivityLog()); 700 } 701 702 @VisibleForTesting 703 protected ConnectivityService(Context context, INetworkManagementService netManager, 704 INetworkStatsService statsService, INetworkPolicyManager policyManager, 705 IpConnectivityLog logger) { 706 if (DBG) log("ConnectivityService starting up"); 707 708 mMetricsLog = logger; 709 mDefaultRequest = createInternetRequestForTransport(-1, NetworkRequest.Type.REQUEST); 710 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); 711 mNetworkRequests.put(mDefaultRequest, defaultNRI); 712 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 713 714 mDefaultMobileDataRequest = createInternetRequestForTransport( 715 NetworkCapabilities.TRANSPORT_CELLULAR, NetworkRequest.Type.BACKGROUND_REQUEST); 716 717 mHandlerThread = createHandlerThread(); 718 mHandlerThread.start(); 719 mHandler = new InternalHandler(mHandlerThread.getLooper()); 720 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 721 722 // setup our unique device name 723 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 724 String id = Settings.Secure.getString(context.getContentResolver(), 725 Settings.Secure.ANDROID_ID); 726 if (id != null && id.length() > 0) { 727 String name = new String("android-").concat(id); 728 SystemProperties.set("net.hostname", name); 729 } 730 } 731 732 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 733 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 734 735 mLingerDelayMs = SystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); 736 737 mContext = checkNotNull(context, "missing Context"); 738 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 739 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 740 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 741 mKeyStore = KeyStore.getInstance(); 742 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 743 744 try { 745 mPolicyManager.setConnectivityListener(mPolicyListener); 746 mRestrictBackground = mPolicyManager.getRestrictBackground(); 747 } catch (RemoteException e) { 748 // ouch, no rules updates means some processes may never get network 749 loge("unable to register INetworkPolicyListener" + e); 750 } 751 752 final PowerManager powerManager = (PowerManager) context.getSystemService( 753 Context.POWER_SERVICE); 754 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 755 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 756 com.android.internal.R.integer.config_networkTransitionTimeout); 757 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 758 759 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 760 761 // TODO: What is the "correct" way to do determine if this is a wifi only device? 762 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 763 log("wifiOnly=" + wifiOnly); 764 String[] naStrings = context.getResources().getStringArray( 765 com.android.internal.R.array.networkAttributes); 766 for (String naString : naStrings) { 767 try { 768 NetworkConfig n = new NetworkConfig(naString); 769 if (VDBG) log("naString=" + naString + " config=" + n); 770 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 771 loge("Error in networkAttributes - ignoring attempt to define type " + 772 n.type); 773 continue; 774 } 775 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 776 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 777 n.type); 778 continue; 779 } 780 if (mNetConfigs[n.type] != null) { 781 loge("Error in networkAttributes - ignoring attempt to redefine type " + 782 n.type); 783 continue; 784 } 785 mLegacyTypeTracker.addSupportedType(n.type); 786 787 mNetConfigs[n.type] = n; 788 mNetworksDefined++; 789 } catch(Exception e) { 790 // ignore it - leave the entry null 791 } 792 } 793 794 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 795 if (mNetConfigs[TYPE_VPN] == null) { 796 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 797 // don't need to add TYPE_VPN to mNetConfigs. 798 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 799 mNetworksDefined++; // used only in the log() statement below. 800 } 801 802 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 803 804 mProtectedNetworks = new ArrayList<Integer>(); 805 int[] protectedNetworks = context.getResources().getIntArray( 806 com.android.internal.R.array.config_protectedNetworks); 807 for (int p : protectedNetworks) { 808 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 809 mProtectedNetworks.add(p); 810 } else { 811 if (DBG) loge("Ignoring protectedNetwork " + p); 812 } 813 } 814 815 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 816 && SystemProperties.get("ro.build.type").equals("eng"); 817 818 mTethering = new Tethering(mContext, mNetd, statsService, mPolicyManager); 819 820 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 821 822 //set up the listener for user state for creating user VPNs 823 IntentFilter intentFilter = new IntentFilter(); 824 intentFilter.addAction(Intent.ACTION_USER_STARTED); 825 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 826 intentFilter.addAction(Intent.ACTION_USER_ADDED); 827 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 828 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 829 mContext.registerReceiverAsUser( 830 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 831 832 try { 833 mNetd.registerObserver(mTethering); 834 mNetd.registerObserver(mDataActivityObserver); 835 } catch (RemoteException e) { 836 loge("Error registering observer :" + e); 837 } 838 839 if (DBG) { 840 mInetLog = new ArrayList(); 841 } 842 843 mSettingsObserver = new SettingsObserver(mContext, mHandler); 844 registerSettingsCallbacks(); 845 846 mDataConnectionStats = new DataConnectionStats(mContext); 847 mDataConnectionStats.startMonitoring(); 848 849 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 850 851 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 852 853 mKeepaliveTracker = new KeepaliveTracker(mHandler); 854 mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager, 855 mContext.getSystemService(NotificationManager.class)); 856 857 final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(), 858 Settings.Global.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT, 859 LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT); 860 final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(), 861 Settings.Global.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS, 862 LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS); 863 mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit); 864 865 mAvoidBadWifiTracker = createAvoidBadWifiTracker( 866 mContext, mHandler, () -> rematchForAvoidBadWifiUpdate()); 867 } 868 869 private NetworkRequest createInternetRequestForTransport( 870 int transportType, NetworkRequest.Type type) { 871 NetworkCapabilities netCap = new NetworkCapabilities(); 872 netCap.addCapability(NET_CAPABILITY_INTERNET); 873 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 874 if (transportType > -1) { 875 netCap.addTransportType(transportType); 876 } 877 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type); 878 } 879 880 // Used only for testing. 881 // TODO: Delete this and either: 882 // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires 883 // changing ContentResolver to make registerContentObserver non-final). 884 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 885 // by subclassing SettingsObserver. 886 @VisibleForTesting 887 void updateMobileDataAlwaysOn() { 888 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 889 } 890 891 private void handleMobileDataAlwaysOn() { 892 final boolean enable = (Settings.Global.getInt( 893 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 894 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 895 if (enable == isEnabled) { 896 return; // Nothing to do. 897 } 898 899 if (enable) { 900 handleRegisterNetworkRequest(new NetworkRequestInfo( 901 null, mDefaultMobileDataRequest, new Binder())); 902 } else { 903 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 904 } 905 } 906 907 private void registerSettingsCallbacks() { 908 // Watch for global HTTP proxy changes. 909 mSettingsObserver.observe( 910 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 911 EVENT_APPLY_GLOBAL_HTTP_PROXY); 912 913 // Watch for whether or not to keep mobile data always on. 914 mSettingsObserver.observe( 915 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 916 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 917 } 918 919 private synchronized int nextNetworkRequestId() { 920 return mNextNetworkRequestId++; 921 } 922 923 @VisibleForTesting 924 protected int reserveNetId() { 925 synchronized (mNetworkForNetId) { 926 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 927 int netId = mNextNetId; 928 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 929 // Make sure NetID unused. http://b/16815182 930 if (!mNetIdInUse.get(netId)) { 931 mNetIdInUse.put(netId, true); 932 return netId; 933 } 934 } 935 } 936 throw new IllegalStateException("No free netIds"); 937 } 938 939 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 940 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 941 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 942 final NetworkState state; 943 if (nai != null) { 944 state = nai.getNetworkState(); 945 state.networkInfo.setType(networkType); 946 } else { 947 final NetworkInfo info = new NetworkInfo(networkType, 0, 948 getNetworkTypeName(networkType), ""); 949 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 950 info.setIsAvailable(true); 951 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 952 null, null, null); 953 } 954 filterNetworkStateForUid(state, uid, ignoreBlocked); 955 return state; 956 } else { 957 return NetworkState.EMPTY; 958 } 959 } 960 961 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 962 if (network == null) { 963 return null; 964 } 965 synchronized (mNetworkForNetId) { 966 return mNetworkForNetId.get(network.netId); 967 } 968 } 969 970 private Network[] getVpnUnderlyingNetworks(int uid) { 971 if (!mLockdownEnabled) { 972 int user = UserHandle.getUserId(uid); 973 synchronized (mVpns) { 974 Vpn vpn = mVpns.get(user); 975 if (vpn != null && vpn.appliesToUid(uid)) { 976 return vpn.getUnderlyingNetworks(); 977 } 978 } 979 } 980 return null; 981 } 982 983 private NetworkState getUnfilteredActiveNetworkState(int uid) { 984 NetworkAgentInfo nai = getDefaultNetwork(); 985 986 final Network[] networks = getVpnUnderlyingNetworks(uid); 987 if (networks != null) { 988 // getUnderlyingNetworks() returns: 989 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 990 // empty array => the VPN explicitly said "no default network". 991 // non-empty array => the VPN specified one or more default networks; we use the 992 // first one. 993 if (networks.length > 0) { 994 nai = getNetworkAgentInfoForNetwork(networks[0]); 995 } else { 996 nai = null; 997 } 998 } 999 1000 if (nai != null) { 1001 return nai.getNetworkState(); 1002 } else { 1003 return NetworkState.EMPTY; 1004 } 1005 } 1006 1007 /** 1008 * Check if UID should be blocked from using the network with the given LinkProperties. 1009 */ 1010 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 1011 boolean ignoreBlocked) { 1012 // Networks aren't blocked when ignoring blocked status 1013 if (ignoreBlocked) return false; 1014 // Networks are never blocked for system services 1015 if (isSystem(uid)) return false; 1016 1017 final boolean networkMetered; 1018 final int uidRules; 1019 1020 synchronized (mVpns) { 1021 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 1022 if (vpn != null && vpn.isBlockingUid(uid)) { 1023 return true; 1024 } 1025 } 1026 1027 final String iface = (lp == null ? "" : lp.getInterfaceName()); 1028 synchronized (mRulesLock) { 1029 networkMetered = mMeteredIfaces.contains(iface); 1030 uidRules = mUidRules.get(uid, RULE_NONE); 1031 } 1032 1033 boolean allowed = true; 1034 // Check Data Saver Mode first... 1035 if (networkMetered) { 1036 if ((uidRules & RULE_REJECT_METERED) != 0) { 1037 if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); 1038 // Explicitly blacklisted. 1039 allowed = false; 1040 } else { 1041 allowed = !mRestrictBackground 1042 || (uidRules & RULE_ALLOW_METERED) != 0 1043 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; 1044 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1045 + " mRestrictBackground=" + mRestrictBackground 1046 + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) 1047 + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" 1048 + ": " + allowed); 1049 } 1050 } 1051 // ...then power restrictions. 1052 if (allowed) { 1053 allowed = (uidRules & RULE_REJECT_ALL) == 0; 1054 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1055 + " rule is " + uidRulesToString(uidRules) + ": " + allowed); 1056 } 1057 return !allowed; 1058 } 1059 1060 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1061 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1062 return; 1063 } 1064 boolean removed = false; 1065 boolean added = false; 1066 synchronized (mBlockedAppUids) { 1067 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1068 added = true; 1069 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1070 removed = true; 1071 } 1072 } 1073 if (added) { 1074 log("Returning blocked NetworkInfo to uid=" + uid); 1075 mNetworkInfoBlockingLogs.log("BLOCKED " + uid); 1076 } else if (removed) { 1077 log("Returning unblocked NetworkInfo to uid=" + uid); 1078 mNetworkInfoBlockingLogs.log("UNBLOCKED " + uid); 1079 } 1080 } 1081 1082 /** 1083 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1084 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1085 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 1086 * {@link NetworkInfo#isMetered()} based on network policies. 1087 */ 1088 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1089 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1090 1091 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1092 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1093 } 1094 if (mLockdownTracker != null) { 1095 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1096 } 1097 1098 // TODO: apply metered state closer to NetworkAgentInfo 1099 final long token = Binder.clearCallingIdentity(); 1100 try { 1101 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 1102 } catch (RemoteException e) { 1103 } finally { 1104 Binder.restoreCallingIdentity(token); 1105 } 1106 } 1107 1108 /** 1109 * Return NetworkInfo for the active (i.e., connected) network interface. 1110 * It is assumed that at most one network is active at a time. If more 1111 * than one is active, it is indeterminate which will be returned. 1112 * @return the info for the active network, or {@code null} if none is 1113 * active 1114 */ 1115 @Override 1116 public NetworkInfo getActiveNetworkInfo() { 1117 enforceAccessPermission(); 1118 final int uid = Binder.getCallingUid(); 1119 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1120 filterNetworkStateForUid(state, uid, false); 1121 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1122 return state.networkInfo; 1123 } 1124 1125 @Override 1126 public Network getActiveNetwork() { 1127 enforceAccessPermission(); 1128 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1129 } 1130 1131 @Override 1132 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1133 enforceConnectivityInternalPermission(); 1134 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1135 } 1136 1137 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1138 final int user = UserHandle.getUserId(uid); 1139 int vpnNetId = NETID_UNSET; 1140 synchronized (mVpns) { 1141 final Vpn vpn = mVpns.get(user); 1142 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1143 } 1144 NetworkAgentInfo nai; 1145 if (vpnNetId != NETID_UNSET) { 1146 synchronized (mNetworkForNetId) { 1147 nai = mNetworkForNetId.get(vpnNetId); 1148 } 1149 if (nai != null) return nai.network; 1150 } 1151 nai = getDefaultNetwork(); 1152 if (nai != null 1153 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1154 nai = null; 1155 } 1156 return nai != null ? nai.network : null; 1157 } 1158 1159 // Public because it's used by mLockdownTracker. 1160 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1161 enforceAccessPermission(); 1162 final int uid = Binder.getCallingUid(); 1163 NetworkState state = getUnfilteredActiveNetworkState(uid); 1164 return state.networkInfo; 1165 } 1166 1167 @Override 1168 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1169 enforceConnectivityInternalPermission(); 1170 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1171 filterNetworkStateForUid(state, uid, ignoreBlocked); 1172 return state.networkInfo; 1173 } 1174 1175 @Override 1176 public NetworkInfo getNetworkInfo(int networkType) { 1177 enforceAccessPermission(); 1178 final int uid = Binder.getCallingUid(); 1179 if (getVpnUnderlyingNetworks(uid) != null) { 1180 // A VPN is active, so we may need to return one of its underlying networks. This 1181 // information is not available in LegacyTypeTracker, so we have to get it from 1182 // getUnfilteredActiveNetworkState. 1183 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1184 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1185 filterNetworkStateForUid(state, uid, false); 1186 return state.networkInfo; 1187 } 1188 } 1189 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1190 return state.networkInfo; 1191 } 1192 1193 @Override 1194 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1195 enforceAccessPermission(); 1196 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1197 if (nai != null) { 1198 final NetworkState state = nai.getNetworkState(); 1199 filterNetworkStateForUid(state, uid, ignoreBlocked); 1200 return state.networkInfo; 1201 } else { 1202 return null; 1203 } 1204 } 1205 1206 @Override 1207 public NetworkInfo[] getAllNetworkInfo() { 1208 enforceAccessPermission(); 1209 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1210 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1211 networkType++) { 1212 NetworkInfo info = getNetworkInfo(networkType); 1213 if (info != null) { 1214 result.add(info); 1215 } 1216 } 1217 return result.toArray(new NetworkInfo[result.size()]); 1218 } 1219 1220 @Override 1221 public Network getNetworkForType(int networkType) { 1222 enforceAccessPermission(); 1223 final int uid = Binder.getCallingUid(); 1224 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1225 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1226 return state.network; 1227 } 1228 return null; 1229 } 1230 1231 @Override 1232 public Network[] getAllNetworks() { 1233 enforceAccessPermission(); 1234 synchronized (mNetworkForNetId) { 1235 final Network[] result = new Network[mNetworkForNetId.size()]; 1236 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1237 result[i] = mNetworkForNetId.valueAt(i).network; 1238 } 1239 return result; 1240 } 1241 } 1242 1243 @Override 1244 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1245 // The basic principle is: if an app's traffic could possibly go over a 1246 // network, without the app doing anything multinetwork-specific, 1247 // (hence, by "default"), then include that network's capabilities in 1248 // the array. 1249 // 1250 // In the normal case, app traffic only goes over the system's default 1251 // network connection, so that's the only network returned. 1252 // 1253 // With a VPN in force, some app traffic may go into the VPN, and thus 1254 // over whatever underlying networks the VPN specifies, while other app 1255 // traffic may go over the system default network (e.g.: a split-tunnel 1256 // VPN, or an app disallowed by the VPN), so the set of networks 1257 // returned includes the VPN's underlying networks and the system 1258 // default. 1259 enforceAccessPermission(); 1260 1261 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1262 1263 NetworkAgentInfo nai = getDefaultNetwork(); 1264 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1265 if (nc != null) { 1266 result.put(nai.network, nc); 1267 } 1268 1269 if (!mLockdownEnabled) { 1270 synchronized (mVpns) { 1271 Vpn vpn = mVpns.get(userId); 1272 if (vpn != null) { 1273 Network[] networks = vpn.getUnderlyingNetworks(); 1274 if (networks != null) { 1275 for (Network network : networks) { 1276 nai = getNetworkAgentInfoForNetwork(network); 1277 nc = getNetworkCapabilitiesInternal(nai); 1278 if (nc != null) { 1279 result.put(network, nc); 1280 } 1281 } 1282 } 1283 } 1284 } 1285 } 1286 1287 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1288 out = result.values().toArray(out); 1289 return out; 1290 } 1291 1292 @Override 1293 public boolean isNetworkSupported(int networkType) { 1294 enforceAccessPermission(); 1295 return mLegacyTypeTracker.isTypeSupported(networkType); 1296 } 1297 1298 /** 1299 * Return LinkProperties for the active (i.e., connected) default 1300 * network interface. It is assumed that at most one default network 1301 * is active at a time. If more than one is active, it is indeterminate 1302 * which will be returned. 1303 * @return the ip properties for the active network, or {@code null} if 1304 * none is active 1305 */ 1306 @Override 1307 public LinkProperties getActiveLinkProperties() { 1308 enforceAccessPermission(); 1309 final int uid = Binder.getCallingUid(); 1310 NetworkState state = getUnfilteredActiveNetworkState(uid); 1311 return state.linkProperties; 1312 } 1313 1314 @Override 1315 public LinkProperties getLinkPropertiesForType(int networkType) { 1316 enforceAccessPermission(); 1317 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1318 if (nai != null) { 1319 synchronized (nai) { 1320 return new LinkProperties(nai.linkProperties); 1321 } 1322 } 1323 return null; 1324 } 1325 1326 // TODO - this should be ALL networks 1327 @Override 1328 public LinkProperties getLinkProperties(Network network) { 1329 enforceAccessPermission(); 1330 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1331 if (nai != null) { 1332 synchronized (nai) { 1333 return new LinkProperties(nai.linkProperties); 1334 } 1335 } 1336 return null; 1337 } 1338 1339 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1340 if (nai != null) { 1341 synchronized (nai) { 1342 if (nai.networkCapabilities != null) { 1343 return new NetworkCapabilities(nai.networkCapabilities); 1344 } 1345 } 1346 } 1347 return null; 1348 } 1349 1350 @Override 1351 public NetworkCapabilities getNetworkCapabilities(Network network) { 1352 enforceAccessPermission(); 1353 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1354 } 1355 1356 @Override 1357 public NetworkState[] getAllNetworkState() { 1358 // Require internal since we're handing out IMSI details 1359 enforceConnectivityInternalPermission(); 1360 1361 final ArrayList<NetworkState> result = Lists.newArrayList(); 1362 for (Network network : getAllNetworks()) { 1363 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1364 if (nai != null) { 1365 result.add(nai.getNetworkState()); 1366 } 1367 } 1368 return result.toArray(new NetworkState[result.size()]); 1369 } 1370 1371 @Override 1372 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1373 enforceAccessPermission(); 1374 final int uid = Binder.getCallingUid(); 1375 final long token = Binder.clearCallingIdentity(); 1376 try { 1377 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1378 if (state.networkInfo != null) { 1379 try { 1380 return mPolicyManager.getNetworkQuotaInfo(state); 1381 } catch (RemoteException e) { 1382 } 1383 } 1384 return null; 1385 } finally { 1386 Binder.restoreCallingIdentity(token); 1387 } 1388 } 1389 1390 @Override 1391 public boolean isActiveNetworkMetered() { 1392 enforceAccessPermission(); 1393 1394 final NetworkInfo info = getActiveNetworkInfo(); 1395 return (info != null) ? info.isMetered() : false; 1396 } 1397 1398 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1399 @Override 1400 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1401 int deviceType = Integer.parseInt(label); 1402 sendDataActivityBroadcast(deviceType, active, tsNanos); 1403 } 1404 }; 1405 1406 /** 1407 * Ensure that a network route exists to deliver traffic to the specified 1408 * host via the specified network interface. 1409 * @param networkType the type of the network over which traffic to the 1410 * specified host is to be routed 1411 * @param hostAddress the IP address of the host to which the route is 1412 * desired 1413 * @return {@code true} on success, {@code false} on failure 1414 */ 1415 @Override 1416 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1417 enforceChangePermission(); 1418 if (mProtectedNetworks.contains(networkType)) { 1419 enforceConnectivityInternalPermission(); 1420 } 1421 1422 InetAddress addr; 1423 try { 1424 addr = InetAddress.getByAddress(hostAddress); 1425 } catch (UnknownHostException e) { 1426 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1427 return false; 1428 } 1429 1430 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1431 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1432 return false; 1433 } 1434 1435 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1436 if (nai == null) { 1437 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1438 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1439 } else { 1440 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1441 } 1442 return false; 1443 } 1444 1445 DetailedState netState; 1446 synchronized (nai) { 1447 netState = nai.networkInfo.getDetailedState(); 1448 } 1449 1450 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1451 if (VDBG) { 1452 log("requestRouteToHostAddress on down network " 1453 + "(" + networkType + ") - dropped" 1454 + " netState=" + netState); 1455 } 1456 return false; 1457 } 1458 1459 final int uid = Binder.getCallingUid(); 1460 final long token = Binder.clearCallingIdentity(); 1461 try { 1462 LinkProperties lp; 1463 int netId; 1464 synchronized (nai) { 1465 lp = nai.linkProperties; 1466 netId = nai.network.netId; 1467 } 1468 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1469 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1470 return ok; 1471 } finally { 1472 Binder.restoreCallingIdentity(token); 1473 } 1474 } 1475 1476 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1477 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1478 if (bestRoute == null) { 1479 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1480 } else { 1481 String iface = bestRoute.getInterface(); 1482 if (bestRoute.getGateway().equals(addr)) { 1483 // if there is no better route, add the implied hostroute for our gateway 1484 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1485 } else { 1486 // if we will connect to this through another route, add a direct route 1487 // to it's gateway 1488 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1489 } 1490 } 1491 if (DBG) log("Adding legacy route " + bestRoute + 1492 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1493 try { 1494 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1495 } catch (Exception e) { 1496 // never crash - catch them all 1497 if (DBG) loge("Exception trying to add a route: " + e); 1498 return false; 1499 } 1500 return true; 1501 } 1502 1503 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1504 @Override 1505 public void onUidRulesChanged(int uid, int uidRules) { 1506 // caller is NPMS, since we only register with them 1507 if (LOGD_RULES) { 1508 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1509 } 1510 1511 synchronized (mRulesLock) { 1512 // skip update when we've already applied rules 1513 final int oldRules = mUidRules.get(uid, RULE_NONE); 1514 if (oldRules == uidRules) return; 1515 1516 if (uidRules == RULE_NONE) { 1517 mUidRules.delete(uid); 1518 } else { 1519 mUidRules.put(uid, uidRules); 1520 } 1521 } 1522 1523 // TODO: notify UID when it has requested targeted updates 1524 } 1525 1526 @Override 1527 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1528 // caller is NPMS, since we only register with them 1529 if (LOGD_RULES) { 1530 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1531 } 1532 1533 synchronized (mRulesLock) { 1534 mMeteredIfaces.clear(); 1535 for (String iface : meteredIfaces) { 1536 mMeteredIfaces.add(iface); 1537 } 1538 } 1539 } 1540 1541 @Override 1542 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1543 // caller is NPMS, since we only register with them 1544 if (LOGD_RULES) { 1545 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1546 } 1547 1548 synchronized (mRulesLock) { 1549 mRestrictBackground = restrictBackground; 1550 } 1551 1552 if (restrictBackground) { 1553 log("onRestrictBackgroundChanged(true): disabling tethering"); 1554 mTethering.untetherAll(); 1555 } 1556 } 1557 1558 @Override 1559 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1560 if (LOGD_RULES) { 1561 // caller is NPMS, since we only register with them 1562 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1563 + whitelisted + ")"); 1564 } 1565 } 1566 @Override 1567 public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { 1568 if (LOGD_RULES) { 1569 // caller is NPMS, since we only register with them 1570 log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" 1571 + blacklisted + ")"); 1572 } 1573 } 1574 }; 1575 1576 /** 1577 * Require that the caller is either in the same user or has appropriate permission to interact 1578 * across users. 1579 * 1580 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1581 */ 1582 private void enforceCrossUserPermission(int userId) { 1583 if (userId == UserHandle.getCallingUserId()) { 1584 // Not a cross-user call. 1585 return; 1586 } 1587 mContext.enforceCallingOrSelfPermission( 1588 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1589 "ConnectivityService"); 1590 } 1591 1592 private void enforceInternetPermission() { 1593 mContext.enforceCallingOrSelfPermission( 1594 android.Manifest.permission.INTERNET, 1595 "ConnectivityService"); 1596 } 1597 1598 private void enforceAccessPermission() { 1599 mContext.enforceCallingOrSelfPermission( 1600 android.Manifest.permission.ACCESS_NETWORK_STATE, 1601 "ConnectivityService"); 1602 } 1603 1604 private void enforceChangePermission() { 1605 ConnectivityManager.enforceChangePermission(mContext); 1606 } 1607 1608 private void enforceTetherAccessPermission() { 1609 mContext.enforceCallingOrSelfPermission( 1610 android.Manifest.permission.ACCESS_NETWORK_STATE, 1611 "ConnectivityService"); 1612 } 1613 1614 private void enforceConnectivityInternalPermission() { 1615 mContext.enforceCallingOrSelfPermission( 1616 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1617 "ConnectivityService"); 1618 } 1619 1620 private void enforceConnectivityRestrictedNetworksPermission() { 1621 try { 1622 mContext.enforceCallingOrSelfPermission( 1623 android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, 1624 "ConnectivityService"); 1625 return; 1626 } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } 1627 enforceConnectivityInternalPermission(); 1628 } 1629 1630 private void enforceKeepalivePermission() { 1631 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1632 } 1633 1634 // Public because it's used by mLockdownTracker. 1635 public void sendConnectedBroadcast(NetworkInfo info) { 1636 enforceConnectivityInternalPermission(); 1637 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1638 } 1639 1640 private void sendInetConditionBroadcast(NetworkInfo info) { 1641 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1642 } 1643 1644 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1645 if (mLockdownTracker != null) { 1646 info = new NetworkInfo(info); 1647 mLockdownTracker.augmentNetworkInfo(info); 1648 } 1649 1650 Intent intent = new Intent(bcastType); 1651 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1652 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1653 if (info.isFailover()) { 1654 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1655 info.setFailover(false); 1656 } 1657 if (info.getReason() != null) { 1658 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1659 } 1660 if (info.getExtraInfo() != null) { 1661 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1662 info.getExtraInfo()); 1663 } 1664 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1665 return intent; 1666 } 1667 1668 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1669 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1670 } 1671 1672 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1673 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1674 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1675 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1676 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1677 final long ident = Binder.clearCallingIdentity(); 1678 try { 1679 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1680 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1681 } finally { 1682 Binder.restoreCallingIdentity(ident); 1683 } 1684 } 1685 1686 private void sendStickyBroadcast(Intent intent) { 1687 synchronized(this) { 1688 if (!mSystemReady) { 1689 mInitialBroadcast = new Intent(intent); 1690 } 1691 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1692 if (VDBG) { 1693 log("sendStickyBroadcast: action=" + intent.getAction()); 1694 } 1695 1696 Bundle options = null; 1697 final long ident = Binder.clearCallingIdentity(); 1698 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1699 final NetworkInfo ni = intent.getParcelableExtra( 1700 ConnectivityManager.EXTRA_NETWORK_INFO); 1701 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1702 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1703 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1704 } else { 1705 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1706 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1707 options = opts.toBundle(); 1708 } 1709 final IBatteryStats bs = BatteryStatsService.getService(); 1710 try { 1711 bs.noteConnectivityChanged(intent.getIntExtra( 1712 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1713 ni != null ? ni.getState().toString() : "?"); 1714 } catch (RemoteException e) { 1715 } 1716 } 1717 try { 1718 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1719 } finally { 1720 Binder.restoreCallingIdentity(ident); 1721 } 1722 } 1723 } 1724 1725 void systemReady() { 1726 loadGlobalProxy(); 1727 1728 synchronized(this) { 1729 mSystemReady = true; 1730 if (mInitialBroadcast != null) { 1731 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1732 mInitialBroadcast = null; 1733 } 1734 } 1735 // load the global proxy at startup 1736 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1737 1738 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1739 // for user to unlock device too. 1740 updateLockdownVpn(); 1741 1742 // Configure whether mobile data is always on. 1743 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1744 1745 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1746 1747 mPermissionMonitor.startMonitoring(); 1748 } 1749 1750 /** 1751 * Setup data activity tracking for the given network. 1752 * 1753 * Every {@code setupDataActivityTracking} should be paired with a 1754 * {@link #removeDataActivityTracking} for cleanup. 1755 */ 1756 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1757 final String iface = networkAgent.linkProperties.getInterfaceName(); 1758 1759 final int timeout; 1760 int type = ConnectivityManager.TYPE_NONE; 1761 1762 if (networkAgent.networkCapabilities.hasTransport( 1763 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1764 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1765 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1766 10); 1767 type = ConnectivityManager.TYPE_MOBILE; 1768 } else if (networkAgent.networkCapabilities.hasTransport( 1769 NetworkCapabilities.TRANSPORT_WIFI)) { 1770 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1771 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1772 15); 1773 type = ConnectivityManager.TYPE_WIFI; 1774 } else { 1775 // do not track any other networks 1776 timeout = 0; 1777 } 1778 1779 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1780 try { 1781 mNetd.addIdleTimer(iface, timeout, type); 1782 } catch (Exception e) { 1783 // You shall not crash! 1784 loge("Exception in setupDataActivityTracking " + e); 1785 } 1786 } 1787 } 1788 1789 /** 1790 * Remove data activity tracking when network disconnects. 1791 */ 1792 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1793 final String iface = networkAgent.linkProperties.getInterfaceName(); 1794 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1795 1796 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1797 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1798 try { 1799 // the call fails silently if no idletimer setup for this interface 1800 mNetd.removeIdleTimer(iface); 1801 } catch (Exception e) { 1802 loge("Exception in removeDataActivityTracking " + e); 1803 } 1804 } 1805 } 1806 1807 /** 1808 * Reads the network specific MTU size from reources. 1809 * and set it on it's iface. 1810 */ 1811 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1812 final String iface = newLp.getInterfaceName(); 1813 final int mtu = newLp.getMtu(); 1814 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1815 if (VDBG) log("identical MTU - not setting"); 1816 return; 1817 } 1818 1819 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1820 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1821 return; 1822 } 1823 1824 // Cannot set MTU without interface name 1825 if (TextUtils.isEmpty(iface)) { 1826 loge("Setting MTU size with null iface."); 1827 return; 1828 } 1829 1830 try { 1831 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1832 mNetd.setMtu(iface, mtu); 1833 } catch (Exception e) { 1834 Slog.e(TAG, "exception in setMtu()" + e); 1835 } 1836 } 1837 1838 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1839 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1840 1841 // Overridden for testing purposes to avoid writing to SystemProperties. 1842 @VisibleForTesting 1843 protected int getDefaultTcpRwnd() { 1844 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1845 } 1846 1847 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1848 if (isDefaultNetwork(nai) == false) { 1849 return; 1850 } 1851 1852 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1853 String[] values = null; 1854 if (tcpBufferSizes != null) { 1855 values = tcpBufferSizes.split(","); 1856 } 1857 1858 if (values == null || values.length != 6) { 1859 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1860 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1861 values = tcpBufferSizes.split(","); 1862 } 1863 1864 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1865 1866 try { 1867 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1868 1869 final String prefix = "/sys/kernel/ipv4/tcp_"; 1870 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1871 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1872 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1873 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1874 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1875 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1876 mCurrentTcpBufferSizes = tcpBufferSizes; 1877 } catch (IOException e) { 1878 loge("Can't set TCP buffer sizes:" + e); 1879 } 1880 1881 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1882 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1883 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1884 if (rwndValue != 0) { 1885 SystemProperties.set(sysctlKey, rwndValue.toString()); 1886 } 1887 } 1888 1889 private void flushVmDnsCache() { 1890 /* 1891 * Tell the VMs to toss their DNS caches 1892 */ 1893 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1894 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1895 /* 1896 * Connectivity events can happen before boot has completed ... 1897 */ 1898 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1899 final long ident = Binder.clearCallingIdentity(); 1900 try { 1901 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1902 } finally { 1903 Binder.restoreCallingIdentity(ident); 1904 } 1905 } 1906 1907 @Override 1908 public int getRestoreDefaultNetworkDelay(int networkType) { 1909 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1910 NETWORK_RESTORE_DELAY_PROP_NAME); 1911 if(restoreDefaultNetworkDelayStr != null && 1912 restoreDefaultNetworkDelayStr.length() != 0) { 1913 try { 1914 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1915 } catch (NumberFormatException e) { 1916 } 1917 } 1918 // if the system property isn't set, use the value for the apn type 1919 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1920 1921 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1922 (mNetConfigs[networkType] != null)) { 1923 ret = mNetConfigs[networkType].restoreTime; 1924 } 1925 return ret; 1926 } 1927 1928 private boolean argsContain(String[] args, String target) { 1929 for (String arg : args) { 1930 if (arg.equals(target)) return true; 1931 } 1932 return false; 1933 } 1934 1935 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1936 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1937 final long DIAG_TIME_MS = 5000; 1938 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1939 // Start gathering diagnostic information. 1940 netDiags.add(new NetworkDiagnostics( 1941 nai.network, 1942 new LinkProperties(nai.linkProperties), // Must be a copy. 1943 DIAG_TIME_MS)); 1944 } 1945 1946 for (NetworkDiagnostics netDiag : netDiags) { 1947 pw.println(); 1948 netDiag.waitForMeasurements(); 1949 netDiag.dump(pw); 1950 } 1951 } 1952 1953 @Override 1954 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1955 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1956 if (mContext.checkCallingOrSelfPermission( 1957 android.Manifest.permission.DUMP) 1958 != PackageManager.PERMISSION_GRANTED) { 1959 pw.println("Permission Denial: can't dump ConnectivityService " + 1960 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1961 Binder.getCallingUid()); 1962 return; 1963 } 1964 1965 if (argsContain(args, "--diag")) { 1966 dumpNetworkDiagnostics(pw); 1967 return; 1968 } 1969 1970 pw.print("NetworkFactories for:"); 1971 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1972 pw.print(" " + nfi.name); 1973 } 1974 pw.println(); 1975 pw.println(); 1976 1977 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1978 pw.print("Active default network: "); 1979 if (defaultNai == null) { 1980 pw.println("none"); 1981 } else { 1982 pw.println(defaultNai.network.netId); 1983 } 1984 pw.println(); 1985 1986 pw.println("Current Networks:"); 1987 pw.increaseIndent(); 1988 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1989 pw.println(nai.toString()); 1990 pw.increaseIndent(); 1991 pw.println(String.format( 1992 "Requests: REQUEST:%d LISTEN:%d BACKGROUND_REQUEST:%d total:%d", 1993 nai.numForegroundNetworkRequests(), 1994 nai.numNetworkRequests() - nai.numRequestNetworkRequests(), 1995 nai.numBackgroundNetworkRequests(), 1996 nai.numNetworkRequests())); 1997 pw.increaseIndent(); 1998 for (int i = 0; i < nai.numNetworkRequests(); i++) { 1999 pw.println(nai.requestAt(i).toString()); 2000 } 2001 pw.decreaseIndent(); 2002 pw.println("Lingered:"); 2003 pw.increaseIndent(); 2004 nai.dumpLingerTimers(pw); 2005 pw.decreaseIndent(); 2006 pw.decreaseIndent(); 2007 } 2008 pw.decreaseIndent(); 2009 pw.println(); 2010 2011 pw.println("Metered Interfaces:"); 2012 pw.increaseIndent(); 2013 for (String value : mMeteredIfaces) { 2014 pw.println(value); 2015 } 2016 pw.decreaseIndent(); 2017 pw.println(); 2018 2019 pw.print("Restrict background: "); 2020 pw.println(mRestrictBackground); 2021 pw.println(); 2022 2023 pw.println("Status for known UIDs:"); 2024 pw.increaseIndent(); 2025 final int size = mUidRules.size(); 2026 for (int i = 0; i < size; i++) { 2027 final int uid = mUidRules.keyAt(i); 2028 pw.print("UID="); 2029 pw.print(uid); 2030 final int uidRules = mUidRules.get(uid, RULE_NONE); 2031 pw.print(" rules="); 2032 pw.print(uidRulesToString(uidRules)); 2033 pw.println(); 2034 } 2035 pw.println(); 2036 pw.decreaseIndent(); 2037 2038 pw.println("Network Requests:"); 2039 pw.increaseIndent(); 2040 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2041 pw.println(nri.toString()); 2042 } 2043 pw.println(); 2044 pw.decreaseIndent(); 2045 2046 mLegacyTypeTracker.dump(pw); 2047 2048 synchronized (this) { 2049 pw.print("mNetTransitionWakeLock: currently " + 2050 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 2051 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 2052 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 2053 } else { 2054 pw.println(", last requested never"); 2055 } 2056 } 2057 2058 pw.println(); 2059 mTethering.dump(fd, pw, args); 2060 2061 pw.println(); 2062 mKeepaliveTracker.dump(pw); 2063 2064 pw.println(); 2065 dumpAvoidBadWifiSettings(pw); 2066 2067 pw.println(); 2068 if (mInetLog != null && mInetLog.size() > 0) { 2069 pw.println(); 2070 pw.println("Inet condition reports:"); 2071 pw.increaseIndent(); 2072 for(int i = 0; i < mInetLog.size(); i++) { 2073 pw.println(mInetLog.get(i)); 2074 } 2075 pw.decreaseIndent(); 2076 } 2077 2078 if (argsContain(args, "--short") == false) { 2079 pw.println(); 2080 synchronized (mValidationLogs) { 2081 pw.println("mValidationLogs (most recent first):"); 2082 for (ValidationLog p : mValidationLogs) { 2083 pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); 2084 pw.increaseIndent(); 2085 p.mLog.dump(fd, pw, args); 2086 pw.decreaseIndent(); 2087 } 2088 } 2089 2090 pw.println(); 2091 pw.println("mNetworkRequestInfoLogs (most recent first):"); 2092 pw.increaseIndent(); 2093 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 2094 pw.decreaseIndent(); 2095 2096 pw.println(); 2097 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 2098 pw.increaseIndent(); 2099 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 2100 pw.decreaseIndent(); 2101 } 2102 } 2103 2104 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 2105 if (nai.network == null) return false; 2106 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 2107 if (officialNai != null && officialNai.equals(nai)) return true; 2108 if (officialNai != null || VDBG) { 2109 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 2110 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 2111 " - " + nai); 2112 } 2113 return false; 2114 } 2115 2116 // must be stateless - things change under us. 2117 private class NetworkStateTrackerHandler extends Handler { 2118 public NetworkStateTrackerHandler(Looper looper) { 2119 super(looper); 2120 } 2121 2122 private boolean maybeHandleAsyncChannelMessage(Message msg) { 2123 switch (msg.what) { 2124 default: 2125 return false; 2126 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2127 handleAsyncChannelHalfConnect(msg); 2128 break; 2129 } 2130 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2131 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2132 if (nai != null) nai.asyncChannel.disconnect(); 2133 break; 2134 } 2135 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2136 handleAsyncChannelDisconnected(msg); 2137 break; 2138 } 2139 } 2140 return true; 2141 } 2142 2143 private void maybeHandleNetworkAgentMessage(Message msg) { 2144 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2145 if (nai == null) { 2146 if (VDBG) { 2147 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 2148 log(String.format("%s from unknown NetworkAgent", what)); 2149 } 2150 return; 2151 } 2152 2153 switch (msg.what) { 2154 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2155 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2156 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2157 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED) || 2158 networkCapabilities.hasCapability(NET_CAPABILITY_FOREGROUND)) { 2159 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2160 } 2161 updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities); 2162 break; 2163 } 2164 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2165 if (VDBG) { 2166 log("Update of LinkProperties for " + nai.name() + 2167 "; created=" + nai.created + 2168 "; everConnected=" + nai.everConnected); 2169 } 2170 LinkProperties oldLp = nai.linkProperties; 2171 synchronized (nai) { 2172 nai.linkProperties = (LinkProperties)msg.obj; 2173 } 2174 if (nai.everConnected) updateLinkProperties(nai, oldLp); 2175 break; 2176 } 2177 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2178 NetworkInfo info = (NetworkInfo) msg.obj; 2179 updateNetworkInfo(nai, info); 2180 break; 2181 } 2182 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2183 Integer score = (Integer) msg.obj; 2184 if (score != null) updateNetworkScore(nai, score.intValue()); 2185 break; 2186 } 2187 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2188 try { 2189 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2190 } catch (Exception e) { 2191 // Never crash! 2192 loge("Exception in addVpnUidRanges: " + e); 2193 } 2194 break; 2195 } 2196 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2197 try { 2198 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2199 } catch (Exception e) { 2200 // Never crash! 2201 loge("Exception in removeVpnUidRanges: " + e); 2202 } 2203 break; 2204 } 2205 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2206 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2207 loge("ERROR: already-connected network explicitly selected."); 2208 } 2209 nai.networkMisc.explicitlySelected = true; 2210 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2211 break; 2212 } 2213 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2214 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2215 break; 2216 } 2217 } 2218 } 2219 2220 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2221 switch (msg.what) { 2222 default: 2223 return false; 2224 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2225 final NetworkAgentInfo nai; 2226 synchronized (mNetworkForNetId) { 2227 nai = mNetworkForNetId.get(msg.arg2); 2228 } 2229 if (nai != null) { 2230 final boolean valid = 2231 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2232 final boolean wasValidated = nai.lastValidated; 2233 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2234 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2235 if (valid != nai.lastValidated) { 2236 final int oldScore = nai.getCurrentScore(); 2237 nai.lastValidated = valid; 2238 nai.everValidated |= valid; 2239 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2240 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2241 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2242 } 2243 updateInetCondition(nai); 2244 // Let the NetworkAgent know the state of its network 2245 Bundle redirectUrlBundle = new Bundle(); 2246 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2247 nai.asyncChannel.sendMessage( 2248 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2249 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2250 0, redirectUrlBundle); 2251 if (wasValidated && !nai.lastValidated) { 2252 handleNetworkUnvalidated(nai); 2253 } 2254 } 2255 break; 2256 } 2257 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2258 final int netId = msg.arg2; 2259 final boolean visible = (msg.arg1 != 0); 2260 final NetworkAgentInfo nai; 2261 synchronized (mNetworkForNetId) { 2262 nai = mNetworkForNetId.get(netId); 2263 } 2264 // If captive portal status has changed, update capabilities. 2265 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2266 final int oldScore = nai.getCurrentScore(); 2267 nai.lastCaptivePortalDetected = visible; 2268 nai.everCaptivePortalDetected |= visible; 2269 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2270 } 2271 if (!visible) { 2272 mNotifier.clearNotification(netId); 2273 } else { 2274 if (nai == null) { 2275 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2276 break; 2277 } 2278 if (!nai.networkMisc.provisioningNotificationDisabled) { 2279 mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null, 2280 (PendingIntent) msg.obj, nai.networkMisc.explicitlySelected); 2281 } 2282 } 2283 break; 2284 } 2285 } 2286 return true; 2287 } 2288 2289 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2290 switch (msg.what) { 2291 default: 2292 return false; 2293 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2294 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2295 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2296 handleLingerComplete(nai); 2297 } 2298 break; 2299 } 2300 } 2301 return true; 2302 } 2303 2304 @Override 2305 public void handleMessage(Message msg) { 2306 if (!maybeHandleAsyncChannelMessage(msg) && 2307 !maybeHandleNetworkMonitorMessage(msg) && 2308 !maybeHandleNetworkAgentInfoMessage(msg)) { 2309 maybeHandleNetworkAgentMessage(msg); 2310 } 2311 } 2312 } 2313 2314 private void updateLingerState(NetworkAgentInfo nai, long now) { 2315 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2316 // 2. If the network was lingering and there are now requests, unlinger it. 2317 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2318 // one lingered request, start lingering. 2319 nai.updateLingerTimer(); 2320 if (nai.isLingering() && nai.numForegroundNetworkRequests() > 0) { 2321 if (DBG) log("Unlingering " + nai.name()); 2322 nai.unlinger(); 2323 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2324 } else if (unneeded(nai, UnneededFor.LINGER) && nai.getLingerExpiry() > 0) { 2325 int lingerTime = (int) (nai.getLingerExpiry() - now); 2326 if (DBG) log("Lingering " + nai.name() + " for " + lingerTime + "ms"); 2327 nai.linger(); 2328 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2329 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2330 } 2331 } 2332 2333 private void handleAsyncChannelHalfConnect(Message msg) { 2334 AsyncChannel ac = (AsyncChannel) msg.obj; 2335 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2336 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2337 if (VDBG) log("NetworkFactory connected"); 2338 // A network factory has connected. Send it all current NetworkRequests. 2339 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2340 if (nri.request.isListen()) continue; 2341 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2342 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2343 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2344 } 2345 } else { 2346 loge("Error connecting NetworkFactory"); 2347 mNetworkFactoryInfos.remove(msg.obj); 2348 } 2349 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2350 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2351 if (VDBG) log("NetworkAgent connected"); 2352 // A network agent has requested a connection. Establish the connection. 2353 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2354 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2355 } else { 2356 loge("Error connecting NetworkAgent"); 2357 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2358 if (nai != null) { 2359 final boolean wasDefault = isDefaultNetwork(nai); 2360 synchronized (mNetworkForNetId) { 2361 mNetworkForNetId.remove(nai.network.netId); 2362 mNetIdInUse.delete(nai.network.netId); 2363 } 2364 // Just in case. 2365 mLegacyTypeTracker.remove(nai, wasDefault); 2366 } 2367 } 2368 } 2369 } 2370 2371 private void handleAsyncChannelDisconnected(Message msg) { 2372 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2373 if (nai != null) { 2374 if (DBG) { 2375 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2376 } 2377 // A network agent has disconnected. 2378 // TODO - if we move the logic to the network agent (have them disconnect 2379 // because they lost all their requests or because their score isn't good) 2380 // then they would disconnect organically, report their new state and then 2381 // disconnect the channel. 2382 if (nai.networkInfo.isConnected()) { 2383 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2384 null, null); 2385 } 2386 final boolean wasDefault = isDefaultNetwork(nai); 2387 if (wasDefault) { 2388 mDefaultInetConditionPublished = 0; 2389 // Log default network disconnection before required book-keeping. 2390 // Let rematchAllNetworksAndRequests() below record a new default network event 2391 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2392 // whose timestamps tell how long it takes to recover a default network. 2393 logDefaultNetworkEvent(null, nai); 2394 } 2395 notifyIfacesChangedForNetworkStats(); 2396 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2397 // by other networks that are already connected. Perhaps that can be done by 2398 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2399 // of rematchAllNetworksAndRequests 2400 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2401 mKeepaliveTracker.handleStopAllKeepalives(nai, 2402 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2403 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2404 mNetworkAgentInfos.remove(msg.replyTo); 2405 updateClat(null, nai.linkProperties, nai); 2406 synchronized (mNetworkForNetId) { 2407 // Remove the NetworkAgent, but don't mark the netId as 2408 // available until we've told netd to delete it below. 2409 mNetworkForNetId.remove(nai.network.netId); 2410 } 2411 // Remove all previously satisfied requests. 2412 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2413 NetworkRequest request = nai.requestAt(i); 2414 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2415 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2416 mNetworkForRequestId.remove(request.requestId); 2417 sendUpdatedScoreToFactories(request, 0); 2418 } 2419 } 2420 nai.clearLingerState(); 2421 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2422 removeDataActivityTracking(nai); 2423 notifyLockdownVpn(nai); 2424 requestNetworkTransitionWakelock(nai.name()); 2425 } 2426 mLegacyTypeTracker.remove(nai, wasDefault); 2427 rematchAllNetworksAndRequests(null, 0); 2428 mLingerMonitor.noteDisconnect(nai); 2429 if (nai.created) { 2430 // Tell netd to clean up the configuration for this network 2431 // (routing rules, DNS, etc). 2432 // This may be slow as it requires a lot of netd shelling out to ip and 2433 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2434 // after we've rematched networks with requests which should make a potential 2435 // fallback network the default or requested a new network from the 2436 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2437 // long time. 2438 try { 2439 mNetd.removeNetwork(nai.network.netId); 2440 } catch (Exception e) { 2441 loge("Exception removing network: " + e); 2442 } 2443 } 2444 synchronized (mNetworkForNetId) { 2445 mNetIdInUse.delete(nai.network.netId); 2446 } 2447 } else { 2448 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2449 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2450 } 2451 } 2452 2453 // If this method proves to be too slow then we can maintain a separate 2454 // pendingIntent => NetworkRequestInfo map. 2455 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2456 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2457 Intent intent = pendingIntent.getIntent(); 2458 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2459 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2460 if (existingPendingIntent != null && 2461 existingPendingIntent.getIntent().filterEquals(intent)) { 2462 return entry.getValue(); 2463 } 2464 } 2465 return null; 2466 } 2467 2468 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2469 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2470 2471 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2472 if (existingRequest != null) { // remove the existing request. 2473 if (DBG) log("Replacing " + existingRequest.request + " with " 2474 + nri.request + " because their intents matched."); 2475 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2476 } 2477 handleRegisterNetworkRequest(nri); 2478 } 2479 2480 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2481 mNetworkRequests.put(nri.request, nri); 2482 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2483 if (nri.request.isListen()) { 2484 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2485 if (nri.request.networkCapabilities.hasSignalStrength() && 2486 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2487 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2488 } 2489 } 2490 } 2491 rematchAllNetworksAndRequests(null, 0); 2492 if (nri.request.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2493 sendUpdatedScoreToFactories(nri.request, 0); 2494 } 2495 } 2496 2497 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2498 int callingUid) { 2499 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2500 if (nri != null) { 2501 handleReleaseNetworkRequest(nri.request, callingUid); 2502 } 2503 } 2504 2505 // Determines whether the network is the best (or could become the best, if it validated), for 2506 // none of a particular type of NetworkRequests. The type of NetworkRequests considered depends 2507 // on the value of reason: 2508 // 2509 // - UnneededFor.TEARDOWN: non-listen NetworkRequests. If a network is unneeded for this reason, 2510 // then it should be torn down. 2511 // - UnneededFor.LINGER: foreground NetworkRequests. If a network is unneeded for this reason, 2512 // then it should be lingered. 2513 private boolean unneeded(NetworkAgentInfo nai, UnneededFor reason) { 2514 final int numRequests; 2515 switch (reason) { 2516 case TEARDOWN: 2517 numRequests = nai.numRequestNetworkRequests(); 2518 break; 2519 case LINGER: 2520 numRequests = nai.numForegroundNetworkRequests(); 2521 break; 2522 default: 2523 Slog.wtf(TAG, "Invalid reason. Cannot happen."); 2524 return true; 2525 } 2526 2527 if (!nai.everConnected || nai.isVPN() || nai.isLingering() || numRequests > 0) { 2528 return false; 2529 } 2530 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2531 if (reason == UnneededFor.LINGER && nri.request.isBackgroundRequest()) { 2532 // Background requests don't affect lingering. 2533 continue; 2534 } 2535 2536 // If this Network is already the highest scoring Network for a request, or if 2537 // there is hope for it to become one if it validated, then it is needed. 2538 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2539 (nai.isSatisfyingRequest(nri.request.requestId) || 2540 // Note that this catches two important cases: 2541 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2542 // is currently satisfying the request. This is desirable when 2543 // cellular ends up validating but WiFi does not. 2544 // 2. Unvalidated WiFi will not be reaped when validated cellular 2545 // is currently satisfying the request. This is desirable when 2546 // WiFi ends up validating and out scoring cellular. 2547 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2548 nai.getCurrentScoreAsValidated())) { 2549 return false; 2550 } 2551 } 2552 return true; 2553 } 2554 2555 private NetworkRequestInfo getNriForAppRequest( 2556 NetworkRequest request, int callingUid, String requestedOperation) { 2557 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2558 2559 if (nri != null) { 2560 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2561 log(String.format("UID %d attempted to %s for unowned request %s", 2562 callingUid, requestedOperation, nri)); 2563 return null; 2564 } 2565 } 2566 2567 return nri; 2568 } 2569 2570 private void handleRequestCallbackUpdate(NetworkRequest request, int callingUid, 2571 String description, int callbackType) { 2572 final NetworkRequestInfo nri = getNriForAppRequest(request, callingUid, description); 2573 if (nri == null) return; 2574 2575 final NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2576 // The network that is satisfying this request may have changed since 2577 // the application requested the update. 2578 // 2579 // - If the request is no longer satisfied, don't send any updates. 2580 // - If the request is satisfied by a different network, it is the 2581 // caller's responsibility to check that the Network object in the 2582 // callback matches the network that was returned in the last 2583 // onAvailable() callback for this request. 2584 if (nai == null) return; 2585 callCallbackForRequest(nri, nai, callbackType, 0); 2586 } 2587 2588 private void handleRequestLinkProperties(NetworkRequest request, int callingUid) { 2589 handleRequestCallbackUpdate(request, callingUid, 2590 "request LinkProperties", ConnectivityManager.CALLBACK_IP_CHANGED); 2591 } 2592 2593 private void handleRequestNetworkCapabilities(NetworkRequest request, int callingUid) { 2594 handleRequestCallbackUpdate(request, callingUid, 2595 "request NetworkCapabilities", ConnectivityManager.CALLBACK_CAP_CHANGED); 2596 } 2597 2598 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2599 final NetworkRequestInfo nri = getNriForAppRequest( 2600 request, callingUid, "release NetworkRequest"); 2601 if (nri == null) return; 2602 2603 if (VDBG || (DBG && nri.request.isRequest())) log("releasing " + request); 2604 nri.unlinkDeathRecipient(); 2605 mNetworkRequests.remove(request); 2606 synchronized (mUidToNetworkRequestCount) { 2607 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2608 if (requests < 1) { 2609 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2610 nri.mUid); 2611 } else if (requests == 1) { 2612 mUidToNetworkRequestCount.removeAt( 2613 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2614 } else { 2615 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2616 } 2617 } 2618 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2619 if (nri.request.isRequest()) { 2620 boolean wasKept = false; 2621 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2622 if (nai != null) { 2623 boolean wasBackgroundNetwork = nai.isBackgroundNetwork(); 2624 nai.removeRequest(nri.request.requestId); 2625 if (VDBG) { 2626 log(" Removing from current network " + nai.name() + 2627 ", leaving " + nai.numNetworkRequests() + " requests."); 2628 } 2629 // If there are still lingered requests on this network, don't tear it down, 2630 // but resume lingering instead. 2631 updateLingerState(nai, SystemClock.elapsedRealtime()); 2632 if (unneeded(nai, UnneededFor.TEARDOWN)) { 2633 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2634 teardownUnneededNetwork(nai); 2635 } else { 2636 wasKept = true; 2637 } 2638 mNetworkForRequestId.remove(nri.request.requestId); 2639 if (!wasBackgroundNetwork && nai.isBackgroundNetwork()) { 2640 // Went from foreground to background. 2641 updateCapabilities(nai.getCurrentScore(), nai, nai.networkCapabilities); 2642 } 2643 } 2644 2645 // TODO: remove this code once we know that the Slog.wtf is never hit. 2646 // 2647 // Find all networks that are satisfying this request and remove the request 2648 // from their request lists. 2649 // TODO - it's my understanding that for a request there is only a single 2650 // network satisfying it, so this loop is wasteful 2651 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2652 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2653 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2654 otherNai.name() + ", but mNetworkAgentInfos says " + 2655 (nai != null ? nai.name() : "null")); 2656 } 2657 } 2658 2659 // Maintain the illusion. When this request arrived, we might have pretended 2660 // that a network connected to serve it, even though the network was already 2661 // connected. Now that this request has gone away, we might have to pretend 2662 // that the network disconnected. LegacyTypeTracker will generate that 2663 // phantom disconnect for this type. 2664 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2665 boolean doRemove = true; 2666 if (wasKept) { 2667 // check if any of the remaining requests for this network are for the 2668 // same legacy type - if so, don't remove the nai 2669 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2670 NetworkRequest otherRequest = nai.requestAt(i); 2671 if (otherRequest.legacyType == nri.request.legacyType && 2672 otherRequest.isRequest()) { 2673 if (DBG) log(" still have other legacy request - leaving"); 2674 doRemove = false; 2675 } 2676 } 2677 } 2678 2679 if (doRemove) { 2680 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2681 } 2682 } 2683 2684 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2685 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2686 nri.request); 2687 } 2688 } else { 2689 // listens don't have a singular affectedNetwork. Check all networks to see 2690 // if this listen request applies and remove it. 2691 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2692 nai.removeRequest(nri.request.requestId); 2693 if (nri.request.networkCapabilities.hasSignalStrength() && 2694 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2695 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2696 } 2697 } 2698 } 2699 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED, 0); 2700 } 2701 2702 @Override 2703 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2704 enforceConnectivityInternalPermission(); 2705 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2706 accept ? 1 : 0, always ? 1: 0, network)); 2707 } 2708 2709 @Override 2710 public void setAvoidUnvalidated(Network network) { 2711 enforceConnectivityInternalPermission(); 2712 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_AVOID_UNVALIDATED, network)); 2713 } 2714 2715 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2716 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2717 " accept=" + accept + " always=" + always); 2718 2719 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2720 if (nai == null) { 2721 // Nothing to do. 2722 return; 2723 } 2724 2725 if (nai.everValidated) { 2726 // The network validated while the dialog box was up. Take no action. 2727 return; 2728 } 2729 2730 if (!nai.networkMisc.explicitlySelected) { 2731 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2732 } 2733 2734 if (accept != nai.networkMisc.acceptUnvalidated) { 2735 int oldScore = nai.getCurrentScore(); 2736 nai.networkMisc.acceptUnvalidated = accept; 2737 rematchAllNetworksAndRequests(nai, oldScore); 2738 sendUpdatedScoreToFactories(nai); 2739 } 2740 2741 if (always) { 2742 nai.asyncChannel.sendMessage( 2743 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2744 } 2745 2746 if (!accept) { 2747 // Tell the NetworkAgent to not automatically reconnect to the network. 2748 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2749 // Teardown the nework. 2750 teardownUnneededNetwork(nai); 2751 } 2752 2753 } 2754 2755 private void handleSetAvoidUnvalidated(Network network) { 2756 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2757 if (nai == null || nai.lastValidated) { 2758 // Nothing to do. The network either disconnected or revalidated. 2759 return; 2760 } 2761 if (!nai.avoidUnvalidated) { 2762 int oldScore = nai.getCurrentScore(); 2763 nai.avoidUnvalidated = true; 2764 rematchAllNetworksAndRequests(nai, oldScore); 2765 sendUpdatedScoreToFactories(nai); 2766 } 2767 } 2768 2769 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2770 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2771 mHandler.sendMessageDelayed( 2772 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2773 PROMPT_UNVALIDATED_DELAY_MS); 2774 } 2775 2776 public boolean avoidBadWifi() { 2777 return mAvoidBadWifiTracker.currentValue(); 2778 } 2779 2780 private void rematchForAvoidBadWifiUpdate() { 2781 rematchAllNetworksAndRequests(null, 0); 2782 for (NetworkAgentInfo nai: mNetworkAgentInfos.values()) { 2783 if (nai.networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) { 2784 sendUpdatedScoreToFactories(nai); 2785 } 2786 } 2787 } 2788 2789 // TODO: Evaluate whether this is of interest to other consumers of 2790 // AvoidBadWifiTracker and worth moving out of here. 2791 private void dumpAvoidBadWifiSettings(IndentingPrintWriter pw) { 2792 final boolean configRestrict = mAvoidBadWifiTracker.configRestrictsAvoidBadWifi(); 2793 if (!configRestrict) { 2794 pw.println("Bad Wi-Fi avoidance: unrestricted"); 2795 return; 2796 } 2797 2798 pw.println("Bad Wi-Fi avoidance: " + avoidBadWifi()); 2799 pw.increaseIndent(); 2800 pw.println("Config restrict: " + configRestrict); 2801 2802 final String value = mAvoidBadWifiTracker.getSettingsValue(); 2803 String description; 2804 // Can't use a switch statement because strings are legal case labels, but null is not. 2805 if ("0".equals(value)) { 2806 description = "get stuck"; 2807 } else if (value == null) { 2808 description = "prompt"; 2809 } else if ("1".equals(value)) { 2810 description = "avoid"; 2811 } else { 2812 description = value + " (?)"; 2813 } 2814 pw.println("User setting: " + description); 2815 pw.println("Network overrides:"); 2816 pw.increaseIndent(); 2817 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2818 if (nai.avoidUnvalidated) { 2819 pw.println(nai.name()); 2820 } 2821 } 2822 pw.decreaseIndent(); 2823 pw.decreaseIndent(); 2824 } 2825 2826 private void showValidationNotification(NetworkAgentInfo nai, NotificationType type) { 2827 final String action; 2828 switch (type) { 2829 case NO_INTERNET: 2830 action = ConnectivityManager.ACTION_PROMPT_UNVALIDATED; 2831 break; 2832 case LOST_INTERNET: 2833 action = ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION; 2834 break; 2835 default: 2836 Slog.wtf(TAG, "Unknown notification type " + type); 2837 return; 2838 } 2839 2840 Intent intent = new Intent(action); 2841 intent.setData(Uri.fromParts("netId", Integer.toString(nai.network.netId), null)); 2842 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2843 intent.setClassName("com.android.settings", 2844 "com.android.settings.wifi.WifiNoInternetDialog"); 2845 2846 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2847 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2848 mNotifier.showNotification(nai.network.netId, type, nai, null, pendingIntent, true); 2849 } 2850 2851 private void handlePromptUnvalidated(Network network) { 2852 if (VDBG) log("handlePromptUnvalidated " + network); 2853 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2854 2855 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2856 // we haven't already been told to switch to it regardless of whether it validated or not. 2857 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2858 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2859 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2860 return; 2861 } 2862 showValidationNotification(nai, NotificationType.NO_INTERNET); 2863 } 2864 2865 private void handleNetworkUnvalidated(NetworkAgentInfo nai) { 2866 NetworkCapabilities nc = nai.networkCapabilities; 2867 if (DBG) log("handleNetworkUnvalidated " + nai.name() + " cap=" + nc); 2868 2869 if (nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) && 2870 mAvoidBadWifiTracker.shouldNotifyWifiUnvalidated()) { 2871 showValidationNotification(nai, NotificationType.LOST_INTERNET); 2872 } 2873 } 2874 2875 private class InternalHandler extends Handler { 2876 public InternalHandler(Looper looper) { 2877 super(looper); 2878 } 2879 2880 @Override 2881 public void handleMessage(Message msg) { 2882 switch (msg.what) { 2883 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2884 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2885 String causedBy = null; 2886 synchronized (ConnectivityService.this) { 2887 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2888 mNetTransitionWakeLock.isHeld()) { 2889 mNetTransitionWakeLock.release(); 2890 causedBy = mNetTransitionWakeLockCausedBy; 2891 } else { 2892 break; 2893 } 2894 } 2895 if (VDBG) { 2896 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2897 log("Failed to find a new network - expiring NetTransition Wakelock"); 2898 } else { 2899 log("NetTransition Wakelock (" + 2900 (causedBy == null ? "unknown" : causedBy) + 2901 " cleared because we found a replacement network"); 2902 } 2903 } 2904 break; 2905 } 2906 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2907 handleDeprecatedGlobalHttpProxy(); 2908 break; 2909 } 2910 case EVENT_PROXY_HAS_CHANGED: { 2911 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2912 break; 2913 } 2914 case EVENT_REGISTER_NETWORK_FACTORY: { 2915 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2916 break; 2917 } 2918 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2919 handleUnregisterNetworkFactory((Messenger)msg.obj); 2920 break; 2921 } 2922 case EVENT_REGISTER_NETWORK_AGENT: { 2923 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2924 break; 2925 } 2926 case EVENT_REGISTER_NETWORK_REQUEST: 2927 case EVENT_REGISTER_NETWORK_LISTENER: { 2928 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2929 break; 2930 } 2931 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2932 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2933 handleRegisterNetworkRequestWithIntent(msg); 2934 break; 2935 } 2936 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2937 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2938 break; 2939 } 2940 case EVENT_RELEASE_NETWORK_REQUEST: { 2941 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2942 break; 2943 } 2944 case EVENT_SET_ACCEPT_UNVALIDATED: { 2945 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2946 break; 2947 } 2948 case EVENT_SET_AVOID_UNVALIDATED: { 2949 handleSetAvoidUnvalidated((Network) msg.obj); 2950 break; 2951 } 2952 case EVENT_PROMPT_UNVALIDATED: { 2953 handlePromptUnvalidated((Network) msg.obj); 2954 break; 2955 } 2956 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2957 handleMobileDataAlwaysOn(); 2958 break; 2959 } 2960 case EVENT_REQUEST_LINKPROPERTIES: 2961 handleRequestLinkProperties((NetworkRequest) msg.obj, msg.arg1); 2962 break; 2963 case EVENT_REQUEST_NETCAPABILITIES: 2964 handleRequestNetworkCapabilities((NetworkRequest) msg.obj, msg.arg1); 2965 break; 2966 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2967 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2968 mKeepaliveTracker.handleStartKeepalive(msg); 2969 break; 2970 } 2971 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2972 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2973 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2974 int slot = msg.arg1; 2975 int reason = msg.arg2; 2976 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2977 break; 2978 } 2979 case EVENT_SYSTEM_READY: { 2980 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2981 nai.networkMonitor.systemReady = true; 2982 } 2983 break; 2984 } 2985 } 2986 } 2987 } 2988 2989 // javadoc from interface 2990 @Override 2991 public int tether(String iface) { 2992 ConnectivityManager.enforceTetherChangePermission(mContext); 2993 if (isTetheringSupported()) { 2994 final int status = mTethering.tether(iface); 2995 return status; 2996 } else { 2997 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2998 } 2999 } 3000 3001 // javadoc from interface 3002 @Override 3003 public int untether(String iface) { 3004 ConnectivityManager.enforceTetherChangePermission(mContext); 3005 3006 if (isTetheringSupported()) { 3007 final int status = mTethering.untether(iface); 3008 return status; 3009 } else { 3010 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3011 } 3012 } 3013 3014 // javadoc from interface 3015 @Override 3016 public int getLastTetherError(String iface) { 3017 enforceTetherAccessPermission(); 3018 3019 if (isTetheringSupported()) { 3020 return mTethering.getLastTetherError(iface); 3021 } else { 3022 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3023 } 3024 } 3025 3026 // TODO - proper iface API for selection by property, inspection, etc 3027 @Override 3028 public String[] getTetherableUsbRegexs() { 3029 enforceTetherAccessPermission(); 3030 if (isTetheringSupported()) { 3031 return mTethering.getTetherableUsbRegexs(); 3032 } else { 3033 return new String[0]; 3034 } 3035 } 3036 3037 @Override 3038 public String[] getTetherableWifiRegexs() { 3039 enforceTetherAccessPermission(); 3040 if (isTetheringSupported()) { 3041 return mTethering.getTetherableWifiRegexs(); 3042 } else { 3043 return new String[0]; 3044 } 3045 } 3046 3047 @Override 3048 public String[] getTetherableBluetoothRegexs() { 3049 enforceTetherAccessPermission(); 3050 if (isTetheringSupported()) { 3051 return mTethering.getTetherableBluetoothRegexs(); 3052 } else { 3053 return new String[0]; 3054 } 3055 } 3056 3057 @Override 3058 public int setUsbTethering(boolean enable) { 3059 ConnectivityManager.enforceTetherChangePermission(mContext); 3060 if (isTetheringSupported()) { 3061 return mTethering.setUsbTethering(enable); 3062 } else { 3063 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3064 } 3065 } 3066 3067 // TODO - move iface listing, queries, etc to new module 3068 // javadoc from interface 3069 @Override 3070 public String[] getTetherableIfaces() { 3071 enforceTetherAccessPermission(); 3072 return mTethering.getTetherableIfaces(); 3073 } 3074 3075 @Override 3076 public String[] getTetheredIfaces() { 3077 enforceTetherAccessPermission(); 3078 return mTethering.getTetheredIfaces(); 3079 } 3080 3081 @Override 3082 public String[] getTetheringErroredIfaces() { 3083 enforceTetherAccessPermission(); 3084 return mTethering.getErroredIfaces(); 3085 } 3086 3087 @Override 3088 public String[] getTetheredDhcpRanges() { 3089 enforceConnectivityInternalPermission(); 3090 return mTethering.getTetheredDhcpRanges(); 3091 } 3092 3093 // if ro.tether.denied = true we default to no tethering 3094 // gservices could set the secure setting to 1 though to enable it on a build where it 3095 // had previously been turned off. 3096 @Override 3097 public boolean isTetheringSupported() { 3098 enforceTetherAccessPermission(); 3099 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 3100 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 3101 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 3102 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 3103 return tetherEnabledInSettings && mUserManager.isAdminUser() && 3104 ((mTethering.getTetherableUsbRegexs().length != 0 || 3105 mTethering.getTetherableWifiRegexs().length != 0 || 3106 mTethering.getTetherableBluetoothRegexs().length != 0) && 3107 mTethering.getUpstreamIfaceTypes().length != 0); 3108 } 3109 3110 @Override 3111 public void startTethering(int type, ResultReceiver receiver, 3112 boolean showProvisioningUi) { 3113 ConnectivityManager.enforceTetherChangePermission(mContext); 3114 if (!isTetheringSupported()) { 3115 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 3116 return; 3117 } 3118 mTethering.startTethering(type, receiver, showProvisioningUi); 3119 } 3120 3121 @Override 3122 public void stopTethering(int type) { 3123 ConnectivityManager.enforceTetherChangePermission(mContext); 3124 mTethering.stopTethering(type); 3125 } 3126 3127 // Called when we lose the default network and have no replacement yet. 3128 // This will automatically be cleared after X seconds or a new default network 3129 // becomes CONNECTED, whichever happens first. The timer is started by the 3130 // first caller and not restarted by subsequent callers. 3131 private void requestNetworkTransitionWakelock(String forWhom) { 3132 int serialNum = 0; 3133 synchronized (this) { 3134 if (mNetTransitionWakeLock.isHeld()) return; 3135 serialNum = ++mNetTransitionWakeLockSerialNumber; 3136 mNetTransitionWakeLock.acquire(); 3137 mNetTransitionWakeLockCausedBy = forWhom; 3138 } 3139 mHandler.sendMessageDelayed(mHandler.obtainMessage( 3140 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 3141 mNetTransitionWakeLockTimeout); 3142 return; 3143 } 3144 3145 // 100 percent is full good, 0 is full bad. 3146 @Override 3147 public void reportInetCondition(int networkType, int percentage) { 3148 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 3149 if (nai == null) return; 3150 reportNetworkConnectivity(nai.network, percentage > 50); 3151 } 3152 3153 @Override 3154 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 3155 enforceAccessPermission(); 3156 enforceInternetPermission(); 3157 3158 NetworkAgentInfo nai; 3159 if (network == null) { 3160 nai = getDefaultNetwork(); 3161 } else { 3162 nai = getNetworkAgentInfoForNetwork(network); 3163 } 3164 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 3165 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 3166 return; 3167 } 3168 // Revalidate if the app report does not match our current validated state. 3169 if (hasConnectivity == nai.lastValidated) return; 3170 final int uid = Binder.getCallingUid(); 3171 if (DBG) { 3172 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 3173 ") by " + uid); 3174 } 3175 synchronized (nai) { 3176 // Validating a network that has not yet connected could result in a call to 3177 // rematchNetworkAndRequests() which is not meant to work on such networks. 3178 if (!nai.everConnected) return; 3179 3180 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 3181 3182 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 3183 } 3184 } 3185 3186 private ProxyInfo getDefaultProxy() { 3187 // this information is already available as a world read/writable jvm property 3188 // so this API change wouldn't have a benifit. It also breaks the passing 3189 // of proxy info to all the JVMs. 3190 // enforceAccessPermission(); 3191 synchronized (mProxyLock) { 3192 ProxyInfo ret = mGlobalProxy; 3193 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3194 return ret; 3195 } 3196 } 3197 3198 @Override 3199 public ProxyInfo getProxyForNetwork(Network network) { 3200 if (network == null) return getDefaultProxy(); 3201 final ProxyInfo globalProxy = getGlobalProxy(); 3202 if (globalProxy != null) return globalProxy; 3203 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3204 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3205 // caller may not have. 3206 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3207 if (nai == null) return null; 3208 synchronized (nai) { 3209 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3210 if (proxyInfo == null) return null; 3211 return new ProxyInfo(proxyInfo); 3212 } 3213 } 3214 3215 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3216 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3217 // proxy is null then there is no proxy in place). 3218 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3219 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3220 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3221 proxy = null; 3222 } 3223 return proxy; 3224 } 3225 3226 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3227 // better for determining if a new proxy broadcast is necessary: 3228 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3229 // avoid unnecessary broadcasts. 3230 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3231 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3232 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3233 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3234 // all set. 3235 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3236 a = canonicalizeProxyInfo(a); 3237 b = canonicalizeProxyInfo(b); 3238 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3239 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3240 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3241 } 3242 3243 public void setGlobalProxy(ProxyInfo proxyProperties) { 3244 enforceConnectivityInternalPermission(); 3245 3246 synchronized (mProxyLock) { 3247 if (proxyProperties == mGlobalProxy) return; 3248 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3249 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3250 3251 String host = ""; 3252 int port = 0; 3253 String exclList = ""; 3254 String pacFileUrl = ""; 3255 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3256 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3257 if (!proxyProperties.isValid()) { 3258 if (DBG) 3259 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3260 return; 3261 } 3262 mGlobalProxy = new ProxyInfo(proxyProperties); 3263 host = mGlobalProxy.getHost(); 3264 port = mGlobalProxy.getPort(); 3265 exclList = mGlobalProxy.getExclusionListAsString(); 3266 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3267 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3268 } 3269 } else { 3270 mGlobalProxy = null; 3271 } 3272 ContentResolver res = mContext.getContentResolver(); 3273 final long token = Binder.clearCallingIdentity(); 3274 try { 3275 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3276 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3277 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3278 exclList); 3279 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3280 } finally { 3281 Binder.restoreCallingIdentity(token); 3282 } 3283 3284 if (mGlobalProxy == null) { 3285 proxyProperties = mDefaultProxy; 3286 } 3287 sendProxyBroadcast(proxyProperties); 3288 } 3289 } 3290 3291 private void loadGlobalProxy() { 3292 ContentResolver res = mContext.getContentResolver(); 3293 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3294 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3295 String exclList = Settings.Global.getString(res, 3296 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3297 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3298 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3299 ProxyInfo proxyProperties; 3300 if (!TextUtils.isEmpty(pacFileUrl)) { 3301 proxyProperties = new ProxyInfo(pacFileUrl); 3302 } else { 3303 proxyProperties = new ProxyInfo(host, port, exclList); 3304 } 3305 if (!proxyProperties.isValid()) { 3306 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3307 return; 3308 } 3309 3310 synchronized (mProxyLock) { 3311 mGlobalProxy = proxyProperties; 3312 } 3313 } 3314 } 3315 3316 public ProxyInfo getGlobalProxy() { 3317 // this information is already available as a world read/writable jvm property 3318 // so this API change wouldn't have a benifit. It also breaks the passing 3319 // of proxy info to all the JVMs. 3320 // enforceAccessPermission(); 3321 synchronized (mProxyLock) { 3322 return mGlobalProxy; 3323 } 3324 } 3325 3326 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3327 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3328 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3329 proxy = null; 3330 } 3331 synchronized (mProxyLock) { 3332 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3333 if (mDefaultProxy == proxy) return; // catches repeated nulls 3334 if (proxy != null && !proxy.isValid()) { 3335 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3336 return; 3337 } 3338 3339 // This call could be coming from the PacManager, containing the port of the local 3340 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3341 // global (to get the correct local port), and send a broadcast. 3342 // TODO: Switch PacManager to have its own message to send back rather than 3343 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3344 if ((mGlobalProxy != null) && (proxy != null) 3345 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3346 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3347 mGlobalProxy = proxy; 3348 sendProxyBroadcast(mGlobalProxy); 3349 return; 3350 } 3351 mDefaultProxy = proxy; 3352 3353 if (mGlobalProxy != null) return; 3354 if (!mDefaultProxyDisabled) { 3355 sendProxyBroadcast(proxy); 3356 } 3357 } 3358 } 3359 3360 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3361 // This method gets called when any network changes proxy, but the broadcast only ever contains 3362 // the default proxy (even if it hasn't changed). 3363 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3364 // world where an app might be bound to a non-default network. 3365 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3366 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3367 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3368 3369 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3370 sendProxyBroadcast(getDefaultProxy()); 3371 } 3372 } 3373 3374 private void handleDeprecatedGlobalHttpProxy() { 3375 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3376 Settings.Global.HTTP_PROXY); 3377 if (!TextUtils.isEmpty(proxy)) { 3378 String data[] = proxy.split(":"); 3379 if (data.length == 0) { 3380 return; 3381 } 3382 3383 String proxyHost = data[0]; 3384 int proxyPort = 8080; 3385 if (data.length > 1) { 3386 try { 3387 proxyPort = Integer.parseInt(data[1]); 3388 } catch (NumberFormatException e) { 3389 return; 3390 } 3391 } 3392 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3393 setGlobalProxy(p); 3394 } 3395 } 3396 3397 private void sendProxyBroadcast(ProxyInfo proxy) { 3398 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3399 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3400 if (DBG) log("sending Proxy Broadcast for " + proxy); 3401 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3402 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3403 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3404 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3405 final long ident = Binder.clearCallingIdentity(); 3406 try { 3407 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3408 } finally { 3409 Binder.restoreCallingIdentity(ident); 3410 } 3411 } 3412 3413 private static class SettingsObserver extends ContentObserver { 3414 final private HashMap<Uri, Integer> mUriEventMap; 3415 final private Context mContext; 3416 final private Handler mHandler; 3417 3418 SettingsObserver(Context context, Handler handler) { 3419 super(null); 3420 mUriEventMap = new HashMap<Uri, Integer>(); 3421 mContext = context; 3422 mHandler = handler; 3423 } 3424 3425 void observe(Uri uri, int what) { 3426 mUriEventMap.put(uri, what); 3427 final ContentResolver resolver = mContext.getContentResolver(); 3428 resolver.registerContentObserver(uri, false, this); 3429 } 3430 3431 @Override 3432 public void onChange(boolean selfChange) { 3433 Slog.wtf(TAG, "Should never be reached."); 3434 } 3435 3436 @Override 3437 public void onChange(boolean selfChange, Uri uri) { 3438 final Integer what = mUriEventMap.get(uri); 3439 if (what != null) { 3440 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3441 } else { 3442 loge("No matching event to send for URI=" + uri); 3443 } 3444 } 3445 } 3446 3447 private static void log(String s) { 3448 Slog.d(TAG, s); 3449 } 3450 3451 private static void loge(String s) { 3452 Slog.e(TAG, s); 3453 } 3454 3455 private static <T> T checkNotNull(T value, String message) { 3456 if (value == null) { 3457 throw new NullPointerException(message); 3458 } 3459 return value; 3460 } 3461 3462 /** 3463 * Prepare for a VPN application. 3464 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3465 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3466 * 3467 * @param oldPackage Package name of the application which currently controls VPN, which will 3468 * be replaced. If there is no such application, this should should either be 3469 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3470 * @param newPackage Package name of the application which should gain control of VPN, or 3471 * {@code null} to disable. 3472 * @param userId User for whom to prepare the new VPN. 3473 * 3474 * @hide 3475 */ 3476 @Override 3477 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3478 int userId) { 3479 enforceCrossUserPermission(userId); 3480 throwIfLockdownEnabled(); 3481 3482 synchronized(mVpns) { 3483 Vpn vpn = mVpns.get(userId); 3484 if (vpn != null) { 3485 return vpn.prepare(oldPackage, newPackage); 3486 } else { 3487 return false; 3488 } 3489 } 3490 } 3491 3492 /** 3493 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3494 * This method is used by system-privileged apps. 3495 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3496 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3497 * 3498 * @param packageName The package for which authorization state should change. 3499 * @param userId User for whom {@code packageName} is installed. 3500 * @param authorized {@code true} if this app should be able to start a VPN connection without 3501 * explicit user approval, {@code false} if not. 3502 * 3503 * @hide 3504 */ 3505 @Override 3506 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3507 enforceCrossUserPermission(userId); 3508 3509 synchronized(mVpns) { 3510 Vpn vpn = mVpns.get(userId); 3511 if (vpn != null) { 3512 vpn.setPackageAuthorization(packageName, authorized); 3513 } 3514 } 3515 } 3516 3517 /** 3518 * Configure a TUN interface and return its file descriptor. Parameters 3519 * are encoded and opaque to this class. This method is used by VpnBuilder 3520 * and not available in ConnectivityManager. Permissions are checked in 3521 * Vpn class. 3522 * @hide 3523 */ 3524 @Override 3525 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3526 throwIfLockdownEnabled(); 3527 int user = UserHandle.getUserId(Binder.getCallingUid()); 3528 synchronized(mVpns) { 3529 return mVpns.get(user).establish(config); 3530 } 3531 } 3532 3533 /** 3534 * Start legacy VPN, controlling native daemons as needed. Creates a 3535 * secondary thread to perform connection work, returning quickly. 3536 */ 3537 @Override 3538 public void startLegacyVpn(VpnProfile profile) { 3539 throwIfLockdownEnabled(); 3540 final LinkProperties egress = getActiveLinkProperties(); 3541 if (egress == null) { 3542 throw new IllegalStateException("Missing active network connection"); 3543 } 3544 int user = UserHandle.getUserId(Binder.getCallingUid()); 3545 synchronized(mVpns) { 3546 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3547 } 3548 } 3549 3550 /** 3551 * Return the information of the ongoing legacy VPN. This method is used 3552 * by VpnSettings and not available in ConnectivityManager. Permissions 3553 * are checked in Vpn class. 3554 */ 3555 @Override 3556 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3557 enforceCrossUserPermission(userId); 3558 3559 synchronized(mVpns) { 3560 return mVpns.get(userId).getLegacyVpnInfo(); 3561 } 3562 } 3563 3564 /** 3565 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3566 * and not available in ConnectivityManager. 3567 */ 3568 @Override 3569 public VpnInfo[] getAllVpnInfo() { 3570 enforceConnectivityInternalPermission(); 3571 if (mLockdownEnabled) { 3572 return new VpnInfo[0]; 3573 } 3574 3575 synchronized(mVpns) { 3576 List<VpnInfo> infoList = new ArrayList<>(); 3577 for (int i = 0; i < mVpns.size(); i++) { 3578 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3579 if (info != null) { 3580 infoList.add(info); 3581 } 3582 } 3583 return infoList.toArray(new VpnInfo[infoList.size()]); 3584 } 3585 } 3586 3587 /** 3588 * @return VPN information for accounting, or null if we can't retrieve all required 3589 * information, e.g primary underlying iface. 3590 */ 3591 @Nullable 3592 private VpnInfo createVpnInfo(Vpn vpn) { 3593 VpnInfo info = vpn.getVpnInfo(); 3594 if (info == null) { 3595 return null; 3596 } 3597 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3598 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3599 // the underlyingNetworks list. 3600 if (underlyingNetworks == null) { 3601 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3602 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3603 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3604 } 3605 } else if (underlyingNetworks.length > 0) { 3606 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3607 if (linkProperties != null) { 3608 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3609 } 3610 } 3611 return info.primaryUnderlyingIface == null ? null : info; 3612 } 3613 3614 /** 3615 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3616 * VpnDialogs and not available in ConnectivityManager. 3617 * Permissions are checked in Vpn class. 3618 * @hide 3619 */ 3620 @Override 3621 public VpnConfig getVpnConfig(int userId) { 3622 enforceCrossUserPermission(userId); 3623 synchronized(mVpns) { 3624 Vpn vpn = mVpns.get(userId); 3625 if (vpn != null) { 3626 return vpn.getVpnConfig(); 3627 } else { 3628 return null; 3629 } 3630 } 3631 } 3632 3633 @Override 3634 public boolean updateLockdownVpn() { 3635 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3636 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3637 return false; 3638 } 3639 3640 // Tear down existing lockdown if profile was removed 3641 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3642 if (mLockdownEnabled) { 3643 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3644 final VpnProfile profile = VpnProfile.decode( 3645 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3646 if (profile == null) { 3647 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3648 setLockdownTracker(null); 3649 return true; 3650 } 3651 int user = UserHandle.getUserId(Binder.getCallingUid()); 3652 synchronized(mVpns) { 3653 Vpn vpn = mVpns.get(user); 3654 if (vpn == null) { 3655 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3656 return false; 3657 } 3658 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3659 } 3660 } else { 3661 setLockdownTracker(null); 3662 } 3663 3664 return true; 3665 } 3666 3667 /** 3668 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3669 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3670 */ 3671 private void setLockdownTracker(LockdownVpnTracker tracker) { 3672 // Shutdown any existing tracker 3673 final LockdownVpnTracker existing = mLockdownTracker; 3674 mLockdownTracker = null; 3675 if (existing != null) { 3676 existing.shutdown(); 3677 } 3678 3679 try { 3680 if (tracker != null) { 3681 mNetd.setFirewallEnabled(true); 3682 mNetd.setFirewallInterfaceRule("lo", true); 3683 mLockdownTracker = tracker; 3684 mLockdownTracker.init(); 3685 } else { 3686 mNetd.setFirewallEnabled(false); 3687 } 3688 } catch (RemoteException e) { 3689 // ignored; NMS lives inside system_server 3690 } 3691 } 3692 3693 private void throwIfLockdownEnabled() { 3694 if (mLockdownEnabled) { 3695 throw new IllegalStateException("Unavailable in lockdown mode"); 3696 } 3697 } 3698 3699 /** 3700 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3701 * some setup and then call {@code establish()} to connect. 3702 * 3703 * @return {@code true} if the service was started, the service was already connected, or there 3704 * was no always-on VPN to start. {@code false} otherwise. 3705 */ 3706 private boolean startAlwaysOnVpn(int userId) { 3707 synchronized (mVpns) { 3708 Vpn vpn = mVpns.get(userId); 3709 if (vpn == null) { 3710 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3711 // exists already. 3712 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3713 return false; 3714 } 3715 3716 return vpn.startAlwaysOnVpn(); 3717 } 3718 } 3719 3720 @Override 3721 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3722 enforceConnectivityInternalPermission(); 3723 enforceCrossUserPermission(userId); 3724 3725 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3726 if (LockdownVpnTracker.isEnabled()) { 3727 return false; 3728 } 3729 3730 synchronized (mVpns) { 3731 Vpn vpn = mVpns.get(userId); 3732 if (vpn == null) { 3733 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3734 return false; 3735 } 3736 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3737 return false; 3738 } 3739 if (!startAlwaysOnVpn(userId)) { 3740 vpn.setAlwaysOnPackage(null, false); 3741 return false; 3742 } 3743 3744 vpn.saveAlwaysOnPackage(); 3745 } 3746 return true; 3747 } 3748 3749 @Override 3750 public String getAlwaysOnVpnPackage(int userId) { 3751 enforceConnectivityInternalPermission(); 3752 enforceCrossUserPermission(userId); 3753 3754 synchronized (mVpns) { 3755 Vpn vpn = mVpns.get(userId); 3756 if (vpn == null) { 3757 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3758 return null; 3759 } 3760 return vpn.getAlwaysOnPackage(); 3761 } 3762 } 3763 3764 @Override 3765 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3766 // TODO: Remove? Any reason to trigger a provisioning check? 3767 return -1; 3768 } 3769 3770 /** Location to an updatable file listing carrier provisioning urls. 3771 * An example: 3772 * 3773 * <?xml version="1.0" encoding="utf-8"?> 3774 * <provisioningUrls> 3775 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3776 * </provisioningUrls> 3777 */ 3778 private static final String PROVISIONING_URL_PATH = 3779 "/data/misc/radio/provisioning_urls.xml"; 3780 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3781 3782 /** XML tag for root element. */ 3783 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3784 /** XML tag for individual url */ 3785 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3786 /** XML attribute for mcc */ 3787 private static final String ATTR_MCC = "mcc"; 3788 /** XML attribute for mnc */ 3789 private static final String ATTR_MNC = "mnc"; 3790 3791 private String getProvisioningUrlBaseFromFile() { 3792 FileReader fileReader = null; 3793 XmlPullParser parser = null; 3794 Configuration config = mContext.getResources().getConfiguration(); 3795 3796 try { 3797 fileReader = new FileReader(mProvisioningUrlFile); 3798 parser = Xml.newPullParser(); 3799 parser.setInput(fileReader); 3800 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3801 3802 while (true) { 3803 XmlUtils.nextElement(parser); 3804 3805 String element = parser.getName(); 3806 if (element == null) break; 3807 3808 if (element.equals(TAG_PROVISIONING_URL)) { 3809 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3810 try { 3811 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3812 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3813 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3814 parser.next(); 3815 if (parser.getEventType() == XmlPullParser.TEXT) { 3816 return parser.getText(); 3817 } 3818 } 3819 } 3820 } catch (NumberFormatException e) { 3821 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3822 } 3823 } 3824 } 3825 return null; 3826 } catch (FileNotFoundException e) { 3827 loge("Carrier Provisioning Urls file not found"); 3828 } catch (XmlPullParserException e) { 3829 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3830 } catch (IOException e) { 3831 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3832 } finally { 3833 if (fileReader != null) { 3834 try { 3835 fileReader.close(); 3836 } catch (IOException e) {} 3837 } 3838 } 3839 return null; 3840 } 3841 3842 @Override 3843 public String getMobileProvisioningUrl() { 3844 enforceConnectivityInternalPermission(); 3845 String url = getProvisioningUrlBaseFromFile(); 3846 if (TextUtils.isEmpty(url)) { 3847 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3848 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3849 } else { 3850 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3851 } 3852 // populate the iccid, imei and phone number in the provisioning url. 3853 if (!TextUtils.isEmpty(url)) { 3854 String phoneNumber = mTelephonyManager.getLine1Number(); 3855 if (TextUtils.isEmpty(phoneNumber)) { 3856 phoneNumber = "0000000000"; 3857 } 3858 url = String.format(url, 3859 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3860 mTelephonyManager.getDeviceId() /* IMEI */, 3861 phoneNumber /* Phone numer */); 3862 } 3863 3864 return url; 3865 } 3866 3867 @Override 3868 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3869 String action) { 3870 enforceConnectivityInternalPermission(); 3871 final long ident = Binder.clearCallingIdentity(); 3872 try { 3873 // Concatenate the range of types onto the range of NetIDs. 3874 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3875 mNotifier.setProvNotificationVisible(visible, id, action); 3876 } finally { 3877 Binder.restoreCallingIdentity(ident); 3878 } 3879 } 3880 3881 @Override 3882 public void setAirplaneMode(boolean enable) { 3883 enforceConnectivityInternalPermission(); 3884 final long ident = Binder.clearCallingIdentity(); 3885 try { 3886 final ContentResolver cr = mContext.getContentResolver(); 3887 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3888 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3889 intent.putExtra("state", enable); 3890 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3891 } finally { 3892 Binder.restoreCallingIdentity(ident); 3893 } 3894 } 3895 3896 private void onUserStart(int userId) { 3897 synchronized(mVpns) { 3898 Vpn userVpn = mVpns.get(userId); 3899 if (userVpn != null) { 3900 loge("Starting user already has a VPN"); 3901 return; 3902 } 3903 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3904 mVpns.put(userId, userVpn); 3905 3906 final ContentResolver cr = mContext.getContentResolver(); 3907 String alwaysOnPackage = Settings.Secure.getStringForUser(cr, 3908 Settings.Secure.ALWAYS_ON_VPN_APP, userId); 3909 final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, 3910 Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; 3911 if (alwaysOnPackage != null) { 3912 userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); 3913 } 3914 } 3915 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3916 updateLockdownVpn(); 3917 } 3918 } 3919 3920 private void onUserStop(int userId) { 3921 synchronized(mVpns) { 3922 Vpn userVpn = mVpns.get(userId); 3923 if (userVpn == null) { 3924 loge("Stopped user has no VPN"); 3925 return; 3926 } 3927 userVpn.onUserStopped(); 3928 mVpns.delete(userId); 3929 } 3930 } 3931 3932 private void onUserAdded(int userId) { 3933 synchronized(mVpns) { 3934 final int vpnsSize = mVpns.size(); 3935 for (int i = 0; i < vpnsSize; i++) { 3936 Vpn vpn = mVpns.valueAt(i); 3937 vpn.onUserAdded(userId); 3938 } 3939 } 3940 } 3941 3942 private void onUserRemoved(int userId) { 3943 synchronized(mVpns) { 3944 final int vpnsSize = mVpns.size(); 3945 for (int i = 0; i < vpnsSize; i++) { 3946 Vpn vpn = mVpns.valueAt(i); 3947 vpn.onUserRemoved(userId); 3948 } 3949 } 3950 } 3951 3952 private void onUserUnlocked(int userId) { 3953 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3954 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3955 updateLockdownVpn(); 3956 } else { 3957 startAlwaysOnVpn(userId); 3958 } 3959 } 3960 3961 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3962 @Override 3963 public void onReceive(Context context, Intent intent) { 3964 final String action = intent.getAction(); 3965 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3966 if (userId == UserHandle.USER_NULL) return; 3967 3968 if (Intent.ACTION_USER_STARTED.equals(action)) { 3969 onUserStart(userId); 3970 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3971 onUserStop(userId); 3972 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3973 onUserAdded(userId); 3974 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3975 onUserRemoved(userId); 3976 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3977 onUserUnlocked(userId); 3978 } 3979 } 3980 }; 3981 3982 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3983 new HashMap<Messenger, NetworkFactoryInfo>(); 3984 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3985 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3986 3987 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3988 // Map from UID to number of NetworkRequests that UID has filed. 3989 @GuardedBy("mUidToNetworkRequestCount") 3990 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3991 3992 private static class NetworkFactoryInfo { 3993 public final String name; 3994 public final Messenger messenger; 3995 public final AsyncChannel asyncChannel; 3996 3997 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3998 this.name = name; 3999 this.messenger = messenger; 4000 this.asyncChannel = asyncChannel; 4001 } 4002 } 4003 4004 private void ensureNetworkRequestHasType(NetworkRequest request) { 4005 if (request.type == NetworkRequest.Type.NONE) { 4006 throw new IllegalArgumentException( 4007 "All NetworkRequests in ConnectivityService must have a type"); 4008 } 4009 } 4010 4011 /** 4012 * Tracks info about the requester. 4013 * Also used to notice when the calling process dies so we can self-expire 4014 */ 4015 private class NetworkRequestInfo implements IBinder.DeathRecipient { 4016 final NetworkRequest request; 4017 final PendingIntent mPendingIntent; 4018 boolean mPendingIntentSent; 4019 private final IBinder mBinder; 4020 final int mPid; 4021 final int mUid; 4022 final Messenger messenger; 4023 4024 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 4025 request = r; 4026 ensureNetworkRequestHasType(request); 4027 mPendingIntent = pi; 4028 messenger = null; 4029 mBinder = null; 4030 mPid = getCallingPid(); 4031 mUid = getCallingUid(); 4032 enforceRequestCountLimit(); 4033 } 4034 4035 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 4036 super(); 4037 messenger = m; 4038 request = r; 4039 ensureNetworkRequestHasType(request); 4040 mBinder = binder; 4041 mPid = getCallingPid(); 4042 mUid = getCallingUid(); 4043 mPendingIntent = null; 4044 enforceRequestCountLimit(); 4045 4046 try { 4047 mBinder.linkToDeath(this, 0); 4048 } catch (RemoteException e) { 4049 binderDied(); 4050 } 4051 } 4052 4053 private void enforceRequestCountLimit() { 4054 synchronized (mUidToNetworkRequestCount) { 4055 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 4056 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 4057 throw new IllegalArgumentException("Too many NetworkRequests filed"); 4058 } 4059 mUidToNetworkRequestCount.put(mUid, networkRequests); 4060 } 4061 } 4062 4063 void unlinkDeathRecipient() { 4064 if (mBinder != null) { 4065 mBinder.unlinkToDeath(this, 0); 4066 } 4067 } 4068 4069 public void binderDied() { 4070 log("ConnectivityService NetworkRequestInfo binderDied(" + 4071 request + ", " + mBinder + ")"); 4072 releaseNetworkRequest(request); 4073 } 4074 4075 public String toString() { 4076 return "uid/pid:" + mUid + "/" + mPid + " " + request + 4077 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 4078 } 4079 } 4080 4081 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 4082 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 4083 if (badCapability != null) { 4084 throw new IllegalArgumentException("Cannot request network with " + badCapability); 4085 } 4086 } 4087 4088 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 4089 final SortedSet<Integer> thresholds = new TreeSet(); 4090 synchronized (nai) { 4091 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4092 if (nri.request.networkCapabilities.hasSignalStrength() && 4093 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 4094 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 4095 } 4096 } 4097 } 4098 return new ArrayList<Integer>(thresholds); 4099 } 4100 4101 private void updateSignalStrengthThresholds( 4102 NetworkAgentInfo nai, String reason, NetworkRequest request) { 4103 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 4104 Bundle thresholds = new Bundle(); 4105 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 4106 4107 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 4108 String detail; 4109 if (request != null && request.networkCapabilities.hasSignalStrength()) { 4110 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 4111 } else { 4112 detail = reason; 4113 } 4114 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 4115 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 4116 } 4117 4118 nai.asyncChannel.sendMessage( 4119 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 4120 0, 0, thresholds); 4121 } 4122 4123 @Override 4124 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 4125 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 4126 final NetworkRequest.Type type = (networkCapabilities == null) 4127 ? NetworkRequest.Type.TRACK_DEFAULT 4128 : NetworkRequest.Type.REQUEST; 4129 // If the requested networkCapabilities is null, take them instead from 4130 // the default network request. This allows callers to keep track of 4131 // the system default network. 4132 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 4133 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 4134 enforceAccessPermission(); 4135 } else { 4136 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4137 enforceNetworkRequestPermissions(networkCapabilities); 4138 // TODO: this is incorrect. We mark the request as metered or not depending on the state 4139 // of the app when the request is filed, but we never change the request if the app 4140 // changes network state. http://b/29964605 4141 enforceMeteredApnPolicy(networkCapabilities); 4142 } 4143 ensureRequestableCapabilities(networkCapabilities); 4144 4145 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 4146 throw new IllegalArgumentException("Bad timeout specified"); 4147 } 4148 4149 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 4150 .equals(networkCapabilities.getNetworkSpecifier())) { 4151 throw new IllegalArgumentException("Invalid network specifier - must not be '" 4152 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 4153 } 4154 4155 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4156 nextNetworkRequestId(), type); 4157 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4158 if (DBG) log("requestNetwork for " + nri); 4159 4160 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4161 if (timeoutMs > 0) { 4162 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4163 nri), timeoutMs); 4164 } 4165 return networkRequest; 4166 } 4167 4168 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4169 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4170 enforceConnectivityRestrictedNetworksPermission(); 4171 } else { 4172 enforceChangePermission(); 4173 } 4174 } 4175 4176 @Override 4177 public boolean requestBandwidthUpdate(Network network) { 4178 enforceAccessPermission(); 4179 NetworkAgentInfo nai = null; 4180 if (network == null) { 4181 return false; 4182 } 4183 synchronized (mNetworkForNetId) { 4184 nai = mNetworkForNetId.get(network.netId); 4185 } 4186 if (nai != null) { 4187 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4188 return true; 4189 } 4190 return false; 4191 } 4192 4193 private boolean isSystem(int uid) { 4194 return uid < Process.FIRST_APPLICATION_UID; 4195 } 4196 4197 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4198 final int uid = Binder.getCallingUid(); 4199 if (isSystem(uid)) { 4200 return; 4201 } 4202 // if UID is restricted, don't allow them to bring up metered APNs 4203 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 4204 final int uidRules; 4205 synchronized(mRulesLock) { 4206 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 4207 } 4208 if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 4209 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { 4210 // we could silently fail or we can filter the available nets to only give 4211 // them those they have access to. Chose the more useful option. 4212 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4213 } 4214 } 4215 } 4216 4217 @Override 4218 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4219 PendingIntent operation) { 4220 checkNotNull(operation, "PendingIntent cannot be null."); 4221 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4222 enforceNetworkRequestPermissions(networkCapabilities); 4223 enforceMeteredApnPolicy(networkCapabilities); 4224 ensureRequestableCapabilities(networkCapabilities); 4225 4226 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4227 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4228 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4229 if (DBG) log("pendingRequest for " + nri); 4230 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4231 nri)); 4232 return networkRequest; 4233 } 4234 4235 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4236 mHandler.sendMessageDelayed( 4237 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4238 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4239 } 4240 4241 @Override 4242 public void releasePendingNetworkRequest(PendingIntent operation) { 4243 checkNotNull(operation, "PendingIntent cannot be null."); 4244 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4245 getCallingUid(), 0, operation)); 4246 } 4247 4248 // In order to implement the compatibility measure for pre-M apps that call 4249 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4250 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4251 // This ensures it has permission to do so. 4252 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4253 if (nc == null) { 4254 return false; 4255 } 4256 int[] transportTypes = nc.getTransportTypes(); 4257 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4258 return false; 4259 } 4260 try { 4261 mContext.enforceCallingOrSelfPermission( 4262 android.Manifest.permission.ACCESS_WIFI_STATE, 4263 "ConnectivityService"); 4264 } catch (SecurityException e) { 4265 return false; 4266 } 4267 return true; 4268 } 4269 4270 @Override 4271 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4272 Messenger messenger, IBinder binder) { 4273 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4274 enforceAccessPermission(); 4275 } 4276 4277 NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities); 4278 if (!ConnectivityManager.checkChangePermission(mContext)) { 4279 // Apps without the CHANGE_NETWORK_STATE permission can't use background networks, so 4280 // make all their listens include NET_CAPABILITY_FOREGROUND. That way, they will get 4281 // onLost and onAvailable callbacks when networks move in and out of the background. 4282 // There is no need to do this for requests because an app without CHANGE_NETWORK_STATE 4283 // can't request networks. 4284 nc.addCapability(NET_CAPABILITY_FOREGROUND); 4285 } 4286 4287 NetworkRequest networkRequest = new NetworkRequest(nc, TYPE_NONE, nextNetworkRequestId(), 4288 NetworkRequest.Type.LISTEN); 4289 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4290 if (VDBG) log("listenForNetwork for " + nri); 4291 4292 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4293 return networkRequest; 4294 } 4295 4296 @Override 4297 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4298 PendingIntent operation) { 4299 checkNotNull(operation, "PendingIntent cannot be null."); 4300 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4301 enforceAccessPermission(); 4302 } 4303 4304 NetworkRequest networkRequest = new NetworkRequest( 4305 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4306 NetworkRequest.Type.LISTEN); 4307 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4308 if (VDBG) log("pendingListenForNetwork for " + nri); 4309 4310 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4311 } 4312 4313 @Override 4314 public void requestLinkProperties(NetworkRequest networkRequest) { 4315 ensureNetworkRequestHasType(networkRequest); 4316 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4317 mHandler.sendMessage(mHandler.obtainMessage( 4318 EVENT_REQUEST_LINKPROPERTIES, getCallingUid(), 0, networkRequest)); 4319 } 4320 4321 @Override 4322 public void requestNetworkCapabilities(NetworkRequest networkRequest) { 4323 ensureNetworkRequestHasType(networkRequest); 4324 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4325 mHandler.sendMessage(mHandler.obtainMessage( 4326 EVENT_REQUEST_NETCAPABILITIES, getCallingUid(), 0, networkRequest)); 4327 } 4328 4329 @Override 4330 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4331 ensureNetworkRequestHasType(networkRequest); 4332 mHandler.sendMessage(mHandler.obtainMessage( 4333 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4334 } 4335 4336 @Override 4337 public void registerNetworkFactory(Messenger messenger, String name) { 4338 enforceConnectivityInternalPermission(); 4339 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4340 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4341 } 4342 4343 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4344 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4345 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4346 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4347 } 4348 4349 @Override 4350 public void unregisterNetworkFactory(Messenger messenger) { 4351 enforceConnectivityInternalPermission(); 4352 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4353 } 4354 4355 private void handleUnregisterNetworkFactory(Messenger messenger) { 4356 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4357 if (nfi == null) { 4358 loge("Failed to find Messenger in unregisterNetworkFactory"); 4359 return; 4360 } 4361 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4362 } 4363 4364 /** 4365 * NetworkAgentInfo supporting a request by requestId. 4366 * These have already been vetted (their Capabilities satisfy the request) 4367 * and the are the highest scored network available. 4368 * the are keyed off the Requests requestId. 4369 */ 4370 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4371 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4372 new SparseArray<NetworkAgentInfo>(); 4373 4374 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4375 @GuardedBy("mNetworkForNetId") 4376 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4377 new SparseArray<NetworkAgentInfo>(); 4378 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4379 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4380 // there may not be a strict 1:1 correlation between the two. 4381 @GuardedBy("mNetworkForNetId") 4382 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4383 4384 // NetworkAgentInfo keyed off its connecting messenger 4385 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4386 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4387 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4388 new HashMap<Messenger, NetworkAgentInfo>(); 4389 4390 @GuardedBy("mBlockedAppUids") 4391 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4392 4393 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4394 private final NetworkRequest mDefaultRequest; 4395 4396 // Request used to optionally keep mobile data active even when higher 4397 // priority networks like Wi-Fi are active. 4398 private final NetworkRequest mDefaultMobileDataRequest; 4399 4400 private NetworkAgentInfo getDefaultNetwork() { 4401 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4402 } 4403 4404 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4405 return nai == getDefaultNetwork(); 4406 } 4407 4408 private boolean isDefaultRequest(NetworkRequestInfo nri) { 4409 return nri.request.requestId == mDefaultRequest.requestId; 4410 } 4411 4412 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4413 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4414 int currentScore, NetworkMisc networkMisc) { 4415 enforceConnectivityInternalPermission(); 4416 4417 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4418 // satisfies mDefaultRequest. 4419 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4420 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4421 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4422 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4423 synchronized (this) { 4424 nai.networkMonitor.systemReady = mSystemReady; 4425 } 4426 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, 4427 networkInfo.getExtraInfo()); 4428 if (DBG) log("registerNetworkAgent " + nai); 4429 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4430 return nai.network.netId; 4431 } 4432 4433 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4434 if (VDBG) log("Got NetworkAgent Messenger"); 4435 mNetworkAgentInfos.put(na.messenger, na); 4436 synchronized (mNetworkForNetId) { 4437 mNetworkForNetId.put(na.network.netId, na); 4438 } 4439 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4440 NetworkInfo networkInfo = na.networkInfo; 4441 na.networkInfo = null; 4442 updateNetworkInfo(na, networkInfo); 4443 } 4444 4445 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4446 LinkProperties newLp = networkAgent.linkProperties; 4447 int netId = networkAgent.network.netId; 4448 4449 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4450 // we do anything else, make sure its LinkProperties are accurate. 4451 if (networkAgent.clatd != null) { 4452 networkAgent.clatd.fixupLinkProperties(oldLp); 4453 } 4454 4455 updateInterfaces(newLp, oldLp, netId); 4456 updateMtu(newLp, oldLp); 4457 // TODO - figure out what to do for clat 4458// for (LinkProperties lp : newLp.getStackedLinks()) { 4459// updateMtu(lp, null); 4460// } 4461 updateTcpBufferSizes(networkAgent); 4462 4463 updateRoutes(newLp, oldLp, netId); 4464 updateDnses(newLp, oldLp, netId); 4465 4466 updateClat(newLp, oldLp, networkAgent); 4467 if (isDefaultNetwork(networkAgent)) { 4468 handleApplyDefaultProxy(newLp.getHttpProxy()); 4469 } else { 4470 updateProxy(newLp, oldLp, networkAgent); 4471 } 4472 // TODO - move this check to cover the whole function 4473 if (!Objects.equals(newLp, oldLp)) { 4474 notifyIfacesChangedForNetworkStats(); 4475 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4476 } 4477 4478 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4479 } 4480 4481 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4482 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4483 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4484 4485 if (!wasRunningClat && shouldRunClat) { 4486 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4487 nai.clatd.start(); 4488 } else if (wasRunningClat && !shouldRunClat) { 4489 nai.clatd.stop(); 4490 } 4491 } 4492 4493 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4494 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4495 if (oldLp != null) { 4496 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4497 } else if (newLp != null) { 4498 interfaceDiff.added = newLp.getAllInterfaceNames(); 4499 } 4500 for (String iface : interfaceDiff.added) { 4501 try { 4502 if (DBG) log("Adding iface " + iface + " to network " + netId); 4503 mNetd.addInterfaceToNetwork(iface, netId); 4504 } catch (Exception e) { 4505 loge("Exception adding interface: " + e); 4506 } 4507 } 4508 for (String iface : interfaceDiff.removed) { 4509 try { 4510 if (DBG) log("Removing iface " + iface + " from network " + netId); 4511 mNetd.removeInterfaceFromNetwork(iface, netId); 4512 } catch (Exception e) { 4513 loge("Exception removing interface: " + e); 4514 } 4515 } 4516 } 4517 4518 /** 4519 * Have netd update routes from oldLp to newLp. 4520 * @return true if routes changed between oldLp and newLp 4521 */ 4522 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4523 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4524 if (oldLp != null) { 4525 routeDiff = oldLp.compareAllRoutes(newLp); 4526 } else if (newLp != null) { 4527 routeDiff.added = newLp.getAllRoutes(); 4528 } 4529 4530 // add routes before removing old in case it helps with continuous connectivity 4531 4532 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4533 for (RouteInfo route : routeDiff.added) { 4534 if (route.hasGateway()) continue; 4535 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4536 try { 4537 mNetd.addRoute(netId, route); 4538 } catch (Exception e) { 4539 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4540 loge("Exception in addRoute for non-gateway: " + e); 4541 } 4542 } 4543 } 4544 for (RouteInfo route : routeDiff.added) { 4545 if (route.hasGateway() == false) continue; 4546 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4547 try { 4548 mNetd.addRoute(netId, route); 4549 } catch (Exception e) { 4550 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4551 loge("Exception in addRoute for gateway: " + e); 4552 } 4553 } 4554 } 4555 4556 for (RouteInfo route : routeDiff.removed) { 4557 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4558 try { 4559 mNetd.removeRoute(netId, route); 4560 } catch (Exception e) { 4561 loge("Exception in removeRoute: " + e); 4562 } 4563 } 4564 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4565 } 4566 4567 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4568 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4569 return; // no updating necessary 4570 } 4571 4572 Collection<InetAddress> dnses = newLp.getDnsServers(); 4573 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4574 try { 4575 mNetd.setDnsConfigurationForNetwork( 4576 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4577 } catch (Exception e) { 4578 loge("Exception in setDnsConfigurationForNetwork: " + e); 4579 } 4580 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4581 if (defaultNai != null && defaultNai.network.netId == netId) { 4582 setDefaultDnsSystemProperties(dnses); 4583 } 4584 flushVmDnsCache(); 4585 } 4586 4587 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4588 int last = 0; 4589 for (InetAddress dns : dnses) { 4590 ++last; 4591 String key = "net.dns" + last; 4592 String value = dns.getHostAddress(); 4593 SystemProperties.set(key, value); 4594 } 4595 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4596 String key = "net.dns" + i; 4597 SystemProperties.set(key, ""); 4598 } 4599 mNumDnsEntries = last; 4600 } 4601 4602 private String getNetworkPermission(NetworkCapabilities nc) { 4603 // TODO: make these permission strings AIDL constants instead. 4604 if (!nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4605 return NetworkManagementService.PERMISSION_SYSTEM; 4606 } 4607 if (!nc.hasCapability(NET_CAPABILITY_FOREGROUND)) { 4608 return NetworkManagementService.PERMISSION_NETWORK; 4609 } 4610 return null; 4611 } 4612 4613 /** 4614 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4615 * augmented with any stateful capabilities implied from {@code networkAgent} 4616 * (e.g., validated status and captive portal status). 4617 * 4618 * @param oldScore score of the network before any of the changes that prompted us 4619 * to call this function. 4620 * @param nai the network having its capabilities updated. 4621 * @param networkCapabilities the new network capabilities. 4622 */ 4623 private void updateCapabilities( 4624 int oldScore, NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4625 if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( 4626 networkCapabilities)) { 4627 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 4628 + nai.networkCapabilities + " -> " + networkCapabilities); 4629 } 4630 4631 // Don't modify caller's NetworkCapabilities. 4632 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4633 if (nai.lastValidated) { 4634 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4635 } else { 4636 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4637 } 4638 if (nai.lastCaptivePortalDetected) { 4639 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4640 } else { 4641 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4642 } 4643 if (nai.isBackgroundNetwork()) { 4644 networkCapabilities.removeCapability(NET_CAPABILITY_FOREGROUND); 4645 } else { 4646 networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 4647 } 4648 4649 if (Objects.equals(nai.networkCapabilities, networkCapabilities)) return; 4650 4651 final String oldPermission = getNetworkPermission(nai.networkCapabilities); 4652 final String newPermission = getNetworkPermission(networkCapabilities); 4653 if (!Objects.equals(oldPermission, newPermission) && nai.created && !nai.isVPN()) { 4654 try { 4655 mNetd.setNetworkPermission(nai.network.netId, newPermission); 4656 } catch (RemoteException e) { 4657 loge("Exception in setNetworkPermission: " + e); 4658 } 4659 } 4660 4661 final NetworkCapabilities prevNc = nai.networkCapabilities; 4662 synchronized (nai) { 4663 nai.networkCapabilities = networkCapabilities; 4664 } 4665 if (nai.getCurrentScore() == oldScore && 4666 networkCapabilities.equalRequestableCapabilities(prevNc)) { 4667 // If the requestable capabilities haven't changed, and the score hasn't changed, then 4668 // the change we're processing can't affect any requests, it can only affect the listens 4669 // on this network. We might have been called by rematchNetworkAndRequests when a 4670 // network changed foreground state. 4671 processListenRequests(nai, true); 4672 } else { 4673 // If the requestable capabilities have changed or the score changed, we can't have been 4674 // called by rematchNetworkAndRequests, so it's safe to start a rematch. 4675 rematchAllNetworksAndRequests(nai, oldScore); 4676 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4677 } 4678 } 4679 4680 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4681 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4682 NetworkRequest nr = nai.requestAt(i); 4683 // Don't send listening requests to factories. b/17393458 4684 if (nr.isListen()) continue; 4685 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4686 } 4687 } 4688 4689 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4690 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4691 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4692 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4693 networkRequest); 4694 } 4695 } 4696 4697 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4698 int notificationType) { 4699 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4700 Intent intent = new Intent(); 4701 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4702 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4703 nri.mPendingIntentSent = true; 4704 sendIntent(nri.mPendingIntent, intent); 4705 } 4706 // else not handled 4707 } 4708 4709 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4710 mPendingIntentWakeLock.acquire(); 4711 try { 4712 if (DBG) log("Sending " + pendingIntent); 4713 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4714 } catch (PendingIntent.CanceledException e) { 4715 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4716 mPendingIntentWakeLock.release(); 4717 releasePendingNetworkRequest(pendingIntent); 4718 } 4719 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4720 } 4721 4722 @Override 4723 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4724 String resultData, Bundle resultExtras) { 4725 if (DBG) log("Finished sending " + pendingIntent); 4726 mPendingIntentWakeLock.release(); 4727 // Release with a delay so the receiving client has an opportunity to put in its 4728 // own request. 4729 releasePendingNetworkRequestWithDelay(pendingIntent); 4730 } 4731 4732 private void callCallbackForRequest(NetworkRequestInfo nri, 4733 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 4734 if (nri.messenger == null) return; // Default request has no msgr 4735 Bundle bundle = new Bundle(); 4736 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4737 new NetworkRequest(nri.request)); 4738 Message msg = Message.obtain(); 4739 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4740 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4741 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4742 } 4743 switch (notificationType) { 4744 case ConnectivityManager.CALLBACK_LOSING: { 4745 msg.arg1 = arg1; 4746 break; 4747 } 4748 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4749 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4750 new NetworkCapabilities(networkAgent.networkCapabilities)); 4751 break; 4752 } 4753 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4754 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4755 new LinkProperties(networkAgent.linkProperties)); 4756 break; 4757 } 4758 } 4759 msg.what = notificationType; 4760 msg.setData(bundle); 4761 try { 4762 if (VDBG) { 4763 log("sending notification " + notifyTypeToName(notificationType) + 4764 " for " + nri.request); 4765 } 4766 nri.messenger.send(msg); 4767 } catch (RemoteException e) { 4768 // may occur naturally in the race of binder death. 4769 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4770 } 4771 } 4772 4773 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4774 if (nai.numRequestNetworkRequests() != 0) { 4775 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4776 NetworkRequest nr = nai.requestAt(i); 4777 // Ignore listening requests. 4778 if (nr.isListen()) continue; 4779 loge("Dead network still had at least " + nr); 4780 break; 4781 } 4782 } 4783 nai.asyncChannel.disconnect(); 4784 } 4785 4786 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4787 if (oldNetwork == null) { 4788 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4789 return; 4790 } 4791 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4792 4793 // If we get here it means that the last linger timeout for this network expired. So there 4794 // must be no other active linger timers, and we must stop lingering. 4795 oldNetwork.clearLingerState(); 4796 4797 if (unneeded(oldNetwork, UnneededFor.TEARDOWN)) { 4798 // Tear the network down. 4799 teardownUnneededNetwork(oldNetwork); 4800 } else { 4801 // Put the network in the background. 4802 updateCapabilities(oldNetwork.getCurrentScore(), oldNetwork, 4803 oldNetwork.networkCapabilities); 4804 } 4805 } 4806 4807 private void makeDefault(NetworkAgentInfo newNetwork) { 4808 if (DBG) log("Switching to new default network: " + newNetwork); 4809 setupDataActivityTracking(newNetwork); 4810 try { 4811 mNetd.setDefaultNetId(newNetwork.network.netId); 4812 } catch (Exception e) { 4813 loge("Exception setting default network :" + e); 4814 } 4815 notifyLockdownVpn(newNetwork); 4816 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4817 updateTcpBufferSizes(newNetwork); 4818 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4819 } 4820 4821 private void processListenRequests(NetworkAgentInfo nai, boolean capabilitiesChanged) { 4822 // For consistency with previous behaviour, send onLost callbacks before onAvailable. 4823 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4824 NetworkRequest nr = nri.request; 4825 if (!nr.isListen()) continue; 4826 if (nai.isSatisfyingRequest(nr.requestId) && !nai.satisfies(nr)) { 4827 nai.removeRequest(nri.request.requestId); 4828 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_LOST, 0); 4829 } 4830 } 4831 4832 if (capabilitiesChanged) { 4833 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4834 } 4835 4836 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4837 NetworkRequest nr = nri.request; 4838 if (!nr.isListen()) continue; 4839 if (nai.satisfies(nr) && !nai.isSatisfyingRequest(nr.requestId)) { 4840 nai.addRequest(nr); 4841 notifyNetworkCallback(nai, nri); 4842 } 4843 } 4844 } 4845 4846 // Handles a network appearing or improving its score. 4847 // 4848 // - Evaluates all current NetworkRequests that can be 4849 // satisfied by newNetwork, and reassigns to newNetwork 4850 // any such requests for which newNetwork is the best. 4851 // 4852 // - Lingers any validated Networks that as a result are no longer 4853 // needed. A network is needed if it is the best network for 4854 // one or more NetworkRequests, or if it is a VPN. 4855 // 4856 // - Tears down newNetwork if it just became validated 4857 // but turns out to be unneeded. 4858 // 4859 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4860 // networks that have no chance (i.e. even if validated) 4861 // of becoming the highest scoring network. 4862 // 4863 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4864 // it does not remove NetworkRequests that other Networks could better satisfy. 4865 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4866 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4867 // as it performs better by a factor of the number of Networks. 4868 // 4869 // @param newNetwork is the network to be matched against NetworkRequests. 4870 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4871 // performed to tear down unvalidated networks that have no chance (i.e. even if 4872 // validated) of becoming the highest scoring network. 4873 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4874 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 4875 if (!newNetwork.everConnected) return; 4876 boolean keep = newNetwork.isVPN(); 4877 boolean isNewDefault = false; 4878 NetworkAgentInfo oldDefaultNetwork = null; 4879 4880 final boolean wasBackgroundNetwork = newNetwork.isBackgroundNetwork(); 4881 final int score = newNetwork.getCurrentScore(); 4882 4883 if (VDBG) log("rematching " + newNetwork.name()); 4884 4885 // Find and migrate to this Network any NetworkRequests for 4886 // which this network is now the best. 4887 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4888 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4889 NetworkCapabilities nc = newNetwork.networkCapabilities; 4890 if (VDBG) log(" network has: " + nc); 4891 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4892 // Process requests in the first pass and listens in the second pass. This allows us to 4893 // change a network's capabilities depending on which requests it has. This is only 4894 // correct if the change in capabilities doesn't affect whether the network satisfies 4895 // requests or not, and doesn't affect the network's score. 4896 if (nri.request.isListen()) continue; 4897 4898 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4899 final boolean satisfies = newNetwork.satisfies(nri.request); 4900 if (newNetwork == currentNetwork && satisfies) { 4901 if (VDBG) { 4902 log("Network " + newNetwork.name() + " was already satisfying" + 4903 " request " + nri.request.requestId + ". No change."); 4904 } 4905 keep = true; 4906 continue; 4907 } 4908 4909 // check if it satisfies the NetworkCapabilities 4910 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4911 if (satisfies) { 4912 // next check if it's better than any current network we're using for 4913 // this request 4914 if (VDBG) { 4915 log("currentScore = " + 4916 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4917 ", newScore = " + score); 4918 } 4919 if (currentNetwork == null || currentNetwork.getCurrentScore() < score) { 4920 if (VDBG) log("rematch for " + newNetwork.name()); 4921 if (currentNetwork != null) { 4922 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4923 currentNetwork.removeRequest(nri.request.requestId); 4924 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 4925 affectedNetworks.add(currentNetwork); 4926 } else { 4927 if (VDBG) log(" accepting network in place of null"); 4928 } 4929 newNetwork.unlingerRequest(nri.request); 4930 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4931 if (!newNetwork.addRequest(nri.request)) { 4932 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4933 } 4934 addedRequests.add(nri); 4935 keep = true; 4936 // Tell NetworkFactories about the new score, so they can stop 4937 // trying to connect if they know they cannot match it. 4938 // TODO - this could get expensive if we have alot of requests for this 4939 // network. Think about if there is a way to reduce this. Push 4940 // netid->request mapping to each factory? 4941 sendUpdatedScoreToFactories(nri.request, score); 4942 if (isDefaultRequest(nri)) { 4943 isNewDefault = true; 4944 oldDefaultNetwork = currentNetwork; 4945 if (currentNetwork != null) { 4946 mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork); 4947 } 4948 } 4949 } 4950 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 4951 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4952 // mark it as no longer satisfying "nri". Because networks are processed by 4953 // rematchAllNetworksAndRequests() in descending score order, "currentNetwork" will 4954 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4955 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4956 // This means this code doesn't have to handle the case where "currentNetwork" no 4957 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4958 if (DBG) { 4959 log("Network " + newNetwork.name() + " stopped satisfying" + 4960 " request " + nri.request.requestId); 4961 } 4962 newNetwork.removeRequest(nri.request.requestId); 4963 if (currentNetwork == newNetwork) { 4964 mNetworkForRequestId.remove(nri.request.requestId); 4965 sendUpdatedScoreToFactories(nri.request, 0); 4966 } else { 4967 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4968 newNetwork.name() + 4969 " without updating mNetworkForRequestId or factories!"); 4970 } 4971 // TODO: Technically, sending CALLBACK_LOST here is 4972 // incorrect if there is a replacement network currently 4973 // connected that can satisfy nri, which is a request 4974 // (not a listen). However, the only capability that can both 4975 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4976 // so this code is only incorrect for a network that loses 4977 // the TRUSTED capability, which is a rare case. 4978 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 4979 } 4980 } 4981 if (isNewDefault) { 4982 // Notify system services that this network is up. 4983 makeDefault(newNetwork); 4984 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 4985 logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); 4986 synchronized (ConnectivityService.this) { 4987 // have a new default network, release the transition wakelock in 4988 // a second if it's held. The second pause is to allow apps 4989 // to reconnect over the new network 4990 if (mNetTransitionWakeLock.isHeld()) { 4991 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4992 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4993 mNetTransitionWakeLockSerialNumber, 0), 4994 1000); 4995 } 4996 } 4997 } 4998 4999 if (!newNetwork.networkCapabilities.equalRequestableCapabilities(nc)) { 5000 Slog.wtf(TAG, String.format( 5001 "BUG: %s changed requestable capabilities during rematch: %s -> %s", 5002 nc, newNetwork.networkCapabilities)); 5003 } 5004 if (newNetwork.getCurrentScore() != score) { 5005 Slog.wtf(TAG, String.format( 5006 "BUG: %s changed score during rematch: %d -> %d", 5007 score, newNetwork.getCurrentScore())); 5008 } 5009 5010 // Second pass: process all listens. 5011 if (wasBackgroundNetwork != newNetwork.isBackgroundNetwork()) { 5012 // If the network went from background to foreground or vice versa, we need to update 5013 // its foreground state. It is safe to do this after rematching the requests because 5014 // NET_CAPABILITY_FOREGROUND does not affect requests, as is not a requestable 5015 // capability and does not affect the network's score (see the Slog.wtf call above). 5016 updateCapabilities(score, newNetwork, newNetwork.networkCapabilities); 5017 } else { 5018 processListenRequests(newNetwork, false); 5019 } 5020 5021 // do this after the default net is switched, but 5022 // before LegacyTypeTracker sends legacy broadcasts 5023 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 5024 5025 // Linger any networks that are no longer needed. This should be done after sending the 5026 // available callback for newNetwork. 5027 for (NetworkAgentInfo nai : affectedNetworks) { 5028 updateLingerState(nai, now); 5029 } 5030 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 5031 // does not need to be done in any particular order. 5032 updateLingerState(newNetwork, now); 5033 5034 if (isNewDefault) { 5035 // Maintain the illusion: since the legacy API only 5036 // understands one network at a time, we must pretend 5037 // that the current default network disconnected before 5038 // the new one connected. 5039 if (oldDefaultNetwork != null) { 5040 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 5041 oldDefaultNetwork, true); 5042 } 5043 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 5044 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 5045 notifyLockdownVpn(newNetwork); 5046 } 5047 5048 if (keep) { 5049 // Notify battery stats service about this network, both the normal 5050 // interface and any stacked links. 5051 // TODO: Avoid redoing this; this must only be done once when a network comes online. 5052 try { 5053 final IBatteryStats bs = BatteryStatsService.getService(); 5054 final int type = newNetwork.networkInfo.getType(); 5055 5056 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 5057 bs.noteNetworkInterfaceType(baseIface, type); 5058 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 5059 final String stackedIface = stacked.getInterfaceName(); 5060 bs.noteNetworkInterfaceType(stackedIface, type); 5061 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 5062 } 5063 } catch (RemoteException ignored) { 5064 } 5065 5066 // This has to happen after the notifyNetworkCallbacks as that tickles each 5067 // ConnectivityManager instance so that legacy requests correctly bind dns 5068 // requests to this network. The legacy users are listening for this bcast 5069 // and will generally do a dns request so they can ensureRouteToHost and if 5070 // they do that before the callbacks happen they'll use the default network. 5071 // 5072 // TODO: Is there still a race here? We send the broadcast 5073 // after sending the callback, but if the app can receive the 5074 // broadcast before the callback, it might still break. 5075 // 5076 // This *does* introduce a race where if the user uses the new api 5077 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 5078 // they may get old info. Reverse this after the old startUsing api is removed. 5079 // This is on top of the multiple intent sequencing referenced in the todo above. 5080 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 5081 NetworkRequest nr = newNetwork.requestAt(i); 5082 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 5083 // legacy type tracker filters out repeat adds 5084 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 5085 } 5086 } 5087 5088 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 5089 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 5090 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 5091 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 5092 if (newNetwork.isVPN()) { 5093 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 5094 } 5095 } 5096 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 5097 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 5098 if (unneeded(nai, UnneededFor.TEARDOWN)) { 5099 if (nai.getLingerExpiry() > 0) { 5100 // This network has active linger timers and no requests, but is not 5101 // lingering. Linger it. 5102 // 5103 // One way (the only way?) this can happen if this network is unvalidated 5104 // and became unneeded due to another network improving its score to the 5105 // point where this network will no longer be able to satisfy any requests 5106 // even if it validates. 5107 updateLingerState(nai, now); 5108 } else { 5109 if (DBG) log("Reaping " + nai.name()); 5110 teardownUnneededNetwork(nai); 5111 } 5112 } 5113 } 5114 } 5115 } 5116 5117 /** 5118 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 5119 * being disconnected. 5120 * @param changed If only one Network's score or capabilities have been modified since the last 5121 * time this function was called, pass this Network in this argument, otherwise pass 5122 * null. 5123 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 5124 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 5125 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 5126 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 5127 * network's score. 5128 */ 5129 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 5130 // TODO: This may get slow. The "changed" parameter is provided for future optimization 5131 // to avoid the slowness. It is not simply enough to process just "changed", for 5132 // example in the case where "changed"'s score decreases and another network should begin 5133 // satifying a NetworkRequest that "changed" currently satisfies. 5134 5135 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 5136 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 5137 // rematchNetworkAndRequests() handles. 5138 final long now = SystemClock.elapsedRealtime(); 5139 if (changed != null && oldScore < changed.getCurrentScore()) { 5140 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 5141 } else { 5142 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 5143 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 5144 // Rematch higher scoring networks first to prevent requests first matching a lower 5145 // scoring network and then a higher scoring network, which could produce multiple 5146 // callbacks and inadvertently unlinger networks. 5147 Arrays.sort(nais); 5148 for (NetworkAgentInfo nai : nais) { 5149 rematchNetworkAndRequests(nai, 5150 // Only reap the last time through the loop. Reaping before all rematching 5151 // is complete could incorrectly teardown a network that hasn't yet been 5152 // rematched. 5153 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 5154 : ReapUnvalidatedNetworks.REAP, 5155 now); 5156 } 5157 } 5158 } 5159 5160 private void updateInetCondition(NetworkAgentInfo nai) { 5161 // Don't bother updating until we've graduated to validated at least once. 5162 if (!nai.everValidated) return; 5163 // For now only update icons for default connection. 5164 // TODO: Update WiFi and cellular icons separately. b/17237507 5165 if (!isDefaultNetwork(nai)) return; 5166 5167 int newInetCondition = nai.lastValidated ? 100 : 0; 5168 // Don't repeat publish. 5169 if (newInetCondition == mDefaultInetConditionPublished) return; 5170 5171 mDefaultInetConditionPublished = newInetCondition; 5172 sendInetConditionBroadcast(nai.networkInfo); 5173 } 5174 5175 private void notifyLockdownVpn(NetworkAgentInfo nai) { 5176 if (mLockdownTracker != null) { 5177 if (nai != null && nai.isVPN()) { 5178 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 5179 } else { 5180 mLockdownTracker.onNetworkInfoChanged(); 5181 } 5182 } 5183 } 5184 5185 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 5186 NetworkInfo.State state = newInfo.getState(); 5187 NetworkInfo oldInfo = null; 5188 final int oldScore = networkAgent.getCurrentScore(); 5189 synchronized (networkAgent) { 5190 oldInfo = networkAgent.networkInfo; 5191 networkAgent.networkInfo = newInfo; 5192 } 5193 notifyLockdownVpn(networkAgent); 5194 5195 if (oldInfo != null && oldInfo.getState() == state) { 5196 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 5197 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 5198 notifyIfacesChangedForNetworkStats(); 5199 } else if (VDBG) log("ignoring duplicate network state non-change"); 5200 // In either case, no further work should be needed. 5201 return; 5202 } 5203 if (DBG) { 5204 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 5205 (oldInfo == null ? "null" : oldInfo.getState()) + 5206 " to " + state); 5207 } 5208 5209 if (!networkAgent.created 5210 && (state == NetworkInfo.State.CONNECTED 5211 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 5212 5213 // A network that has just connected has zero requests and is thus a foreground network. 5214 networkAgent.networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 5215 5216 try { 5217 // This should never fail. Specifying an already in use NetID will cause failure. 5218 if (networkAgent.isVPN()) { 5219 mNetd.createVirtualNetwork(networkAgent.network.netId, 5220 !networkAgent.linkProperties.getDnsServers().isEmpty(), 5221 (networkAgent.networkMisc == null || 5222 !networkAgent.networkMisc.allowBypass)); 5223 } else { 5224 mNetd.createPhysicalNetwork(networkAgent.network.netId, 5225 getNetworkPermission(networkAgent.networkCapabilities)); 5226 } 5227 } catch (Exception e) { 5228 loge("Error creating network " + networkAgent.network.netId + ": " 5229 + e.getMessage()); 5230 return; 5231 } 5232 networkAgent.created = true; 5233 } 5234 5235 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 5236 networkAgent.everConnected = true; 5237 5238 updateLinkProperties(networkAgent, null); 5239 notifyIfacesChangedForNetworkStats(); 5240 5241 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 5242 scheduleUnvalidatedPrompt(networkAgent); 5243 5244 if (networkAgent.isVPN()) { 5245 // Temporarily disable the default proxy (not global). 5246 synchronized (mProxyLock) { 5247 if (!mDefaultProxyDisabled) { 5248 mDefaultProxyDisabled = true; 5249 if (mGlobalProxy == null && mDefaultProxy != null) { 5250 sendProxyBroadcast(null); 5251 } 5252 } 5253 } 5254 // TODO: support proxy per network. 5255 } 5256 5257 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5258 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5259 // capabilities, so it only needs to be done once on initial connect, not every time the 5260 // network's capabilities change. Note that we do this before rematching the network, 5261 // so we could decide to tear it down immediately afterwards. That's fine though - on 5262 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5263 // doing. 5264 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5265 5266 // Consider network even though it is not yet validated. 5267 final long now = SystemClock.elapsedRealtime(); 5268 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5269 5270 // This has to happen after matching the requests, because callbacks are just requests. 5271 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5272 } else if (state == NetworkInfo.State.DISCONNECTED) { 5273 networkAgent.asyncChannel.disconnect(); 5274 if (networkAgent.isVPN()) { 5275 synchronized (mProxyLock) { 5276 if (mDefaultProxyDisabled) { 5277 mDefaultProxyDisabled = false; 5278 if (mGlobalProxy == null && mDefaultProxy != null) { 5279 sendProxyBroadcast(mDefaultProxy); 5280 } 5281 } 5282 } 5283 } 5284 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5285 state == NetworkInfo.State.SUSPENDED) { 5286 // going into or coming out of SUSPEND: rescore and notify 5287 if (networkAgent.getCurrentScore() != oldScore) { 5288 rematchAllNetworksAndRequests(networkAgent, oldScore); 5289 } 5290 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5291 ConnectivityManager.CALLBACK_SUSPENDED : 5292 ConnectivityManager.CALLBACK_RESUMED)); 5293 mLegacyTypeTracker.update(networkAgent); 5294 } 5295 } 5296 5297 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5298 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5299 if (score < 0) { 5300 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5301 "). Bumping score to min of 0"); 5302 score = 0; 5303 } 5304 5305 final int oldScore = nai.getCurrentScore(); 5306 nai.setCurrentScore(score); 5307 5308 rematchAllNetworksAndRequests(nai, oldScore); 5309 5310 sendUpdatedScoreToFactories(nai); 5311 } 5312 5313 // notify only this one new request of the current state 5314 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5315 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 5316 if (nri.mPendingIntent == null) { 5317 callCallbackForRequest(nri, nai, notifyType, 0); 5318 } else { 5319 sendPendingIntentForRequest(nri, nai, notifyType); 5320 } 5321 } 5322 5323 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5324 // The NetworkInfo we actually send out has no bearing on the real 5325 // state of affairs. For example, if the default connection is mobile, 5326 // and a request for HIPRI has just gone away, we need to pretend that 5327 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5328 // the state to DISCONNECTED, even though the network is of type MOBILE 5329 // and is still connected. 5330 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5331 info.setType(type); 5332 if (state != DetailedState.DISCONNECTED) { 5333 info.setDetailedState(state, null, info.getExtraInfo()); 5334 sendConnectedBroadcast(info); 5335 } else { 5336 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5337 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5338 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5339 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5340 if (info.isFailover()) { 5341 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5342 nai.networkInfo.setFailover(false); 5343 } 5344 if (info.getReason() != null) { 5345 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5346 } 5347 if (info.getExtraInfo() != null) { 5348 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5349 } 5350 NetworkAgentInfo newDefaultAgent = null; 5351 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5352 newDefaultAgent = getDefaultNetwork(); 5353 if (newDefaultAgent != null) { 5354 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5355 newDefaultAgent.networkInfo); 5356 } else { 5357 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5358 } 5359 } 5360 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5361 mDefaultInetConditionPublished); 5362 sendStickyBroadcast(intent); 5363 if (newDefaultAgent != null) { 5364 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5365 } 5366 } 5367 } 5368 5369 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5370 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5371 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5372 NetworkRequest nr = networkAgent.requestAt(i); 5373 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5374 if (VDBG) log(" sending notification for " + nr); 5375 // TODO: if we're in the middle of a rematch, can we send a CAP_CHANGED callback for 5376 // a network that no longer satisfies the listen? 5377 if (nri.mPendingIntent == null) { 5378 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5379 } else { 5380 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5381 } 5382 } 5383 } 5384 5385 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5386 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5387 } 5388 5389 private String notifyTypeToName(int notifyType) { 5390 switch (notifyType) { 5391 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5392 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5393 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5394 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5395 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5396 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5397 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5398 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5399 } 5400 return "UNKNOWN"; 5401 } 5402 5403 /** 5404 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5405 * properties tracked by NetworkStatsService on an active iface has changed. 5406 */ 5407 private void notifyIfacesChangedForNetworkStats() { 5408 try { 5409 mStatsService.forceUpdateIfaces(); 5410 } catch (Exception ignored) { 5411 } 5412 } 5413 5414 @Override 5415 public boolean addVpnAddress(String address, int prefixLength) { 5416 throwIfLockdownEnabled(); 5417 int user = UserHandle.getUserId(Binder.getCallingUid()); 5418 synchronized (mVpns) { 5419 return mVpns.get(user).addAddress(address, prefixLength); 5420 } 5421 } 5422 5423 @Override 5424 public boolean removeVpnAddress(String address, int prefixLength) { 5425 throwIfLockdownEnabled(); 5426 int user = UserHandle.getUserId(Binder.getCallingUid()); 5427 synchronized (mVpns) { 5428 return mVpns.get(user).removeAddress(address, prefixLength); 5429 } 5430 } 5431 5432 @Override 5433 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5434 throwIfLockdownEnabled(); 5435 int user = UserHandle.getUserId(Binder.getCallingUid()); 5436 boolean success; 5437 synchronized (mVpns) { 5438 success = mVpns.get(user).setUnderlyingNetworks(networks); 5439 } 5440 if (success) { 5441 notifyIfacesChangedForNetworkStats(); 5442 } 5443 return success; 5444 } 5445 5446 @Override 5447 public String getCaptivePortalServerUrl() { 5448 return NetworkMonitor.getCaptivePortalServerHttpUrl(mContext); 5449 } 5450 5451 @Override 5452 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5453 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5454 enforceKeepalivePermission(); 5455 mKeepaliveTracker.startNattKeepalive( 5456 getNetworkAgentInfoForNetwork(network), 5457 intervalSeconds, messenger, binder, 5458 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5459 } 5460 5461 @Override 5462 public void stopKeepalive(Network network, int slot) { 5463 mHandler.sendMessage(mHandler.obtainMessage( 5464 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5465 } 5466 5467 @Override 5468 public void factoryReset() { 5469 enforceConnectivityInternalPermission(); 5470 5471 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5472 return; 5473 } 5474 5475 final int userId = UserHandle.getCallingUserId(); 5476 5477 // Turn airplane mode off 5478 setAirplaneMode(false); 5479 5480 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5481 // Untether 5482 for (String tether : getTetheredIfaces()) { 5483 untether(tether); 5484 } 5485 } 5486 5487 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5488 // Remove always-on package 5489 synchronized (mVpns) { 5490 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5491 if (alwaysOnPackage != null) { 5492 setAlwaysOnVpnPackage(userId, null, false); 5493 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5494 } 5495 } 5496 5497 // Turn VPN off 5498 VpnConfig vpnConfig = getVpnConfig(userId); 5499 if (vpnConfig != null) { 5500 if (vpnConfig.legacy) { 5501 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5502 } else { 5503 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5504 // in the future without user intervention. 5505 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5506 5507 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5508 } 5509 } 5510 } 5511 5512 Settings.Global.putString(mContext.getContentResolver(), 5513 Settings.Global.NETWORK_AVOID_BAD_WIFI, null); 5514 } 5515 5516 @VisibleForTesting 5517 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5518 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5519 return new NetworkMonitor(context, handler, nai, defaultRequest); 5520 } 5521 5522 @VisibleForTesting 5523 AvoidBadWifiTracker createAvoidBadWifiTracker(Context c, Handler h, Runnable r) { 5524 return new AvoidBadWifiTracker(c, h, r); 5525 } 5526 5527 @VisibleForTesting 5528 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5529 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5530 } 5531 5532 private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5533 int newNetid = NETID_UNSET; 5534 int prevNetid = NETID_UNSET; 5535 int[] transports = new int[0]; 5536 boolean hadIPv4 = false; 5537 boolean hadIPv6 = false; 5538 5539 if (newNai != null) { 5540 newNetid = newNai.network.netId; 5541 transports = newNai.networkCapabilities.getTransportTypes(); 5542 } 5543 if (prevNai != null) { 5544 prevNetid = prevNai.network.netId; 5545 final LinkProperties lp = prevNai.linkProperties; 5546 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5547 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5548 } 5549 5550 mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); 5551 } 5552 5553 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5554 mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); 5555 } 5556} 5557