ConnectivityService.java revision 065ab6ee407dc8b3b5b477e483b6f48e50720113
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 31import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 32import static android.net.NetworkPolicyManager.RULE_ALLOW_METERED; 33import static android.net.NetworkPolicyManager.RULE_NONE; 34import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 35import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 36import static android.net.NetworkPolicyManager.RULE_TEMPORARY_ALLOW_METERED; 37import static android.net.NetworkPolicyManager.uidRulesToString; 38 39import android.annotation.Nullable; 40import android.app.BroadcastOptions; 41import android.app.NotificationManager; 42import android.app.PendingIntent; 43import android.content.BroadcastReceiver; 44import android.content.ContentResolver; 45import android.content.Context; 46import android.content.Intent; 47import android.content.IntentFilter; 48import android.content.pm.PackageManager; 49import android.content.res.Configuration; 50import android.content.res.Resources; 51import android.database.ContentObserver; 52import android.net.ConnectivityManager; 53import android.net.ConnectivityManager.PacketKeepalive; 54import android.net.IConnectivityManager; 55import android.net.INetworkManagementEventObserver; 56import android.net.INetworkPolicyListener; 57import android.net.INetworkPolicyManager; 58import android.net.INetworkStatsService; 59import android.net.LinkProperties; 60import android.net.LinkProperties.CompareResult; 61import android.net.Network; 62import android.net.NetworkAgent; 63import android.net.NetworkCapabilities; 64import android.net.NetworkConfig; 65import android.net.NetworkInfo; 66import android.net.NetworkInfo.DetailedState; 67import android.net.NetworkMisc; 68import android.net.NetworkQuotaInfo; 69import android.net.NetworkRequest; 70import android.net.NetworkState; 71import android.net.NetworkUtils; 72import android.net.Proxy; 73import android.net.ProxyInfo; 74import android.net.RouteInfo; 75import android.net.UidRange; 76import android.net.Uri; 77import android.net.metrics.DefaultNetworkEvent; 78import android.net.metrics.IpConnectivityLog; 79import android.net.metrics.NetworkEvent; 80import android.net.util.AvoidBadWifiTracker; 81import android.os.Binder; 82import android.os.Build; 83import android.os.Bundle; 84import android.os.FileUtils; 85import android.os.Handler; 86import android.os.HandlerThread; 87import android.os.IBinder; 88import android.os.INetworkManagementService; 89import android.os.Looper; 90import android.os.Message; 91import android.os.Messenger; 92import android.os.ParcelFileDescriptor; 93import android.os.PowerManager; 94import android.os.Process; 95import android.os.RemoteException; 96import android.os.ResultReceiver; 97import android.os.SystemClock; 98import android.os.SystemProperties; 99import android.os.UserHandle; 100import android.os.UserManager; 101import android.provider.Settings; 102import android.security.Credentials; 103import android.security.KeyStore; 104import android.telephony.TelephonyManager; 105import android.text.TextUtils; 106import android.util.ArraySet; 107import android.util.LocalLog; 108import android.util.LocalLog.ReadOnlyLocalLog; 109import android.util.Log; 110import android.util.Pair; 111import android.util.Slog; 112import android.util.SparseArray; 113import android.util.SparseBooleanArray; 114import android.util.SparseIntArray; 115import android.util.Xml; 116 117import com.android.internal.R; 118import com.android.internal.annotations.GuardedBy; 119import com.android.internal.annotations.VisibleForTesting; 120import com.android.internal.app.IBatteryStats; 121import com.android.internal.net.LegacyVpnInfo; 122import com.android.internal.net.NetworkStatsFactory; 123import com.android.internal.net.VpnConfig; 124import com.android.internal.net.VpnInfo; 125import com.android.internal.net.VpnProfile; 126import com.android.internal.util.AsyncChannel; 127import com.android.internal.util.IndentingPrintWriter; 128import com.android.internal.util.MessageUtils; 129import com.android.internal.util.WakeupMessage; 130import com.android.internal.util.XmlUtils; 131import com.android.server.am.BatteryStatsService; 132import com.android.server.connectivity.DataConnectionStats; 133import com.android.server.connectivity.KeepaliveTracker; 134import com.android.server.connectivity.Nat464Xlat; 135import com.android.server.connectivity.LingerMonitor; 136import com.android.server.connectivity.NetworkAgentInfo; 137import com.android.server.connectivity.NetworkDiagnostics; 138import com.android.server.connectivity.NetworkMonitor; 139import com.android.server.connectivity.NetworkNotificationManager; 140import com.android.server.connectivity.NetworkNotificationManager.NotificationType; 141import com.android.server.connectivity.PacManager; 142import com.android.server.connectivity.PermissionMonitor; 143import com.android.server.connectivity.Tethering; 144import com.android.server.connectivity.Vpn; 145import com.android.server.net.BaseNetworkObserver; 146import com.android.server.net.LockdownVpnTracker; 147 148import com.google.android.collect.Lists; 149 150import org.xmlpull.v1.XmlPullParser; 151import org.xmlpull.v1.XmlPullParserException; 152 153import java.io.File; 154import java.io.FileDescriptor; 155import java.io.FileNotFoundException; 156import java.io.FileReader; 157import java.io.IOException; 158import java.io.PrintWriter; 159import java.net.Inet4Address; 160import java.net.InetAddress; 161import java.net.UnknownHostException; 162import java.util.ArrayDeque; 163import java.util.ArrayList; 164import java.util.Arrays; 165import java.util.Collection; 166import java.util.HashMap; 167import java.util.HashSet; 168import java.util.List; 169import java.util.Map; 170import java.util.Objects; 171import java.util.SortedSet; 172import java.util.TreeSet; 173 174/** 175 * @hide 176 */ 177public class ConnectivityService extends IConnectivityManager.Stub 178 implements PendingIntent.OnFinished { 179 private static final String TAG = ConnectivityService.class.getSimpleName(); 180 181 private static final boolean DBG = true; 182 private static final boolean VDBG = false; 183 184 private static final boolean LOGD_RULES = false; 185 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 186 187 // TODO: create better separation between radio types and network types 188 189 // how long to wait before switching back to a radio's default network 190 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 191 // system property that can override the above value 192 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 193 "android.telephony.apn-restore"; 194 195 // How long to wait before putting up a "This network doesn't have an Internet connection, 196 // connect anyway?" dialog after the user selects a network that doesn't validate. 197 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 198 199 // Default to 30s linger time-out. Modifiable only for testing. 200 private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; 201 private static final int DEFAULT_LINGER_DELAY_MS = 30_000; 202 @VisibleForTesting 203 protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it. 204 205 // How long to delay to removal of a pending intent based request. 206 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 207 private final int mReleasePendingIntentDelayMs; 208 209 private Tethering mTethering; 210 211 private final PermissionMonitor mPermissionMonitor; 212 213 private KeyStore mKeyStore; 214 215 @GuardedBy("mVpns") 216 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 217 218 private boolean mLockdownEnabled; 219 private LockdownVpnTracker mLockdownTracker; 220 221 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 222 private Object mRulesLock = new Object(); 223 /** Currently active network rules by UID. */ 224 @GuardedBy("mRulesLock") 225 private SparseIntArray mUidRules = new SparseIntArray(); 226 /** Set of ifaces that are costly. */ 227 @GuardedBy("mRulesLock") 228 private ArraySet<String> mMeteredIfaces = new ArraySet<>(); 229 /** Flag indicating if background data is restricted. */ 230 @GuardedBy("mRulesLock") 231 private boolean mRestrictBackground; 232 233 final private Context mContext; 234 private int mNetworkPreference; 235 // 0 is full bad, 100 is full good 236 private int mDefaultInetConditionPublished = 0; 237 238 private int mNumDnsEntries; 239 240 private boolean mTestMode; 241 private static ConnectivityService sServiceInstance; 242 243 private INetworkManagementService mNetd; 244 private INetworkStatsService mStatsService; 245 private INetworkPolicyManager mPolicyManager; 246 247 private String mCurrentTcpBufferSizes; 248 249 private static final int ENABLED = 1; 250 private static final int DISABLED = 0; 251 252 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 253 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class, 254 NetworkAgentInfo.class }); 255 256 private enum ReapUnvalidatedNetworks { 257 // Tear down networks that have no chance (e.g. even if validated) of becoming 258 // the highest scoring network satisfying a NetworkRequest. This should be passed when 259 // all networks have been rematched against all NetworkRequests. 260 REAP, 261 // Don't reap networks. This should be passed when some networks have not yet been 262 // rematched against all NetworkRequests. 263 DONT_REAP 264 }; 265 266 /** 267 * used internally to change our mobile data enabled flag 268 */ 269 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 270 271 /** 272 * used internally to clear a wakelock when transitioning 273 * from one net to another. Clear happens when we get a new 274 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 275 * after a timeout if no network is found (typically 1 min). 276 */ 277 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 278 279 /** 280 * used internally to reload global proxy settings 281 */ 282 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 283 284 /** 285 * PAC manager has received new port. 286 */ 287 private static final int EVENT_PROXY_HAS_CHANGED = 16; 288 289 /** 290 * used internally when registering NetworkFactories 291 * obj = NetworkFactoryInfo 292 */ 293 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 294 295 /** 296 * used internally when registering NetworkAgents 297 * obj = Messenger 298 */ 299 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 300 301 /** 302 * used to add a network request 303 * includes a NetworkRequestInfo 304 */ 305 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 306 307 /** 308 * indicates a timeout period is over - check if we had a network yet or not 309 * and if not, call the timeout callback (but leave the request live until they 310 * cancel it. 311 * includes a NetworkRequestInfo 312 */ 313 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 314 315 /** 316 * used to add a network listener - no request 317 * includes a NetworkRequestInfo 318 */ 319 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 320 321 /** 322 * used to remove a network request, either a listener or a real request 323 * arg1 = UID of caller 324 * obj = NetworkRequest 325 */ 326 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 327 328 /** 329 * used internally when registering NetworkFactories 330 * obj = Messenger 331 */ 332 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 333 334 /** 335 * used internally to expire a wakelock when transitioning 336 * from one net to another. Expire happens when we fail to find 337 * a new network (typically after 1 minute) - 338 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 339 * a replacement network. 340 */ 341 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 342 343 /** 344 * Used internally to indicate the system is ready. 345 */ 346 private static final int EVENT_SYSTEM_READY = 25; 347 348 /** 349 * used to add a network request with a pending intent 350 * obj = NetworkRequestInfo 351 */ 352 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 353 354 /** 355 * used to remove a pending intent and its associated network request. 356 * arg1 = UID of caller 357 * obj = PendingIntent 358 */ 359 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 360 361 /** 362 * used to specify whether a network should be used even if unvalidated. 363 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 364 * arg2 = whether to remember this choice in the future (1 or 0) 365 * obj = network 366 */ 367 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 368 369 /** 370 * used to specify whether a network should not be penalized when it becomes unvalidated. 371 */ 372 private static final int EVENT_SET_AVOID_UNVALIDATED = 35; 373 374 /** 375 * used to ask the user to confirm a connection to an unvalidated network. 376 * obj = network 377 */ 378 private static final int EVENT_PROMPT_UNVALIDATED = 29; 379 380 /** 381 * used internally to (re)configure mobile data always-on settings. 382 */ 383 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 384 385 /** 386 * used to add a network listener with a pending intent 387 * obj = NetworkRequestInfo 388 */ 389 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 390 391 /** 392 * Indicates a caller has requested to have its callback invoked with 393 * the latest LinkProperties or NetworkCapabilities. 394 * 395 * arg1 = UID of caller 396 * obj = NetworkRequest 397 */ 398 private static final int EVENT_REQUEST_LINKPROPERTIES = 32; 399 private static final int EVENT_REQUEST_NETCAPABILITIES = 33; 400 401 /** Handler thread used for both of the handlers below. */ 402 @VisibleForTesting 403 protected final HandlerThread mHandlerThread; 404 /** Handler used for internal events. */ 405 final private InternalHandler mHandler; 406 /** Handler used for incoming {@link NetworkStateTracker} events. */ 407 final private NetworkStateTrackerHandler mTrackerHandler; 408 409 private boolean mSystemReady; 410 private Intent mInitialBroadcast; 411 412 private PowerManager.WakeLock mNetTransitionWakeLock; 413 private String mNetTransitionWakeLockCausedBy = ""; 414 private int mNetTransitionWakeLockSerialNumber; 415 private int mNetTransitionWakeLockTimeout; 416 private final PowerManager.WakeLock mPendingIntentWakeLock; 417 418 // used in DBG mode to track inet condition reports 419 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 420 private ArrayList mInetLog; 421 422 // track the current default http proxy - tell the world if we get a new one (real change) 423 private volatile ProxyInfo mDefaultProxy = null; 424 private Object mProxyLock = new Object(); 425 private boolean mDefaultProxyDisabled = false; 426 427 // track the global proxy. 428 private ProxyInfo mGlobalProxy = null; 429 430 private PacManager mPacManager = null; 431 432 final private SettingsObserver mSettingsObserver; 433 434 private UserManager mUserManager; 435 436 NetworkConfig[] mNetConfigs; 437 int mNetworksDefined; 438 439 // the set of network types that can only be enabled by system/sig apps 440 List mProtectedNetworks; 441 442 private DataConnectionStats mDataConnectionStats; 443 444 TelephonyManager mTelephonyManager; 445 446 private KeepaliveTracker mKeepaliveTracker; 447 private NetworkNotificationManager mNotifier; 448 private LingerMonitor mLingerMonitor; 449 450 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 451 private final static int MIN_NET_ID = 100; // some reserved marks 452 private final static int MAX_NET_ID = 65535; 453 private int mNextNetId = MIN_NET_ID; 454 455 // sequence number of NetworkRequests 456 private int mNextNetworkRequestId = 1; 457 458 // NetworkRequest activity String log entries. 459 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 460 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 461 462 // NetworkInfo blocked and unblocked String log entries 463 // TODO: consider reducing memory usage. Each log line is ~40 2B chars, for a total of ~8kB. 464 private static final int MAX_NETWORK_INFO_LOGS = 100; 465 private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); 466 467 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 468 private static final int MAX_VALIDATION_LOGS = 10; 469 private static class ValidationLog { 470 final Network mNetwork; 471 final String mNetworkExtraInfo; 472 final ReadOnlyLocalLog mLog; 473 474 ValidationLog(Network network, String networkExtraInfo, ReadOnlyLocalLog log) { 475 mNetwork = network; 476 mNetworkExtraInfo = networkExtraInfo; 477 mLog = log; 478 } 479 } 480 private final ArrayDeque<ValidationLog> mValidationLogs = 481 new ArrayDeque<ValidationLog>(MAX_VALIDATION_LOGS); 482 483 private void addValidationLogs(ReadOnlyLocalLog log, Network network, String networkExtraInfo) { 484 synchronized(mValidationLogs) { 485 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 486 mValidationLogs.removeLast(); 487 } 488 mValidationLogs.addFirst(new ValidationLog(network, networkExtraInfo, log)); 489 } 490 } 491 492 private final IpConnectivityLog mMetricsLog; 493 494 @VisibleForTesting 495 final AvoidBadWifiTracker mAvoidBadWifiTracker; 496 497 /** 498 * Implements support for the legacy "one network per network type" model. 499 * 500 * We used to have a static array of NetworkStateTrackers, one for each 501 * network type, but that doesn't work any more now that we can have, 502 * for example, more that one wifi network. This class stores all the 503 * NetworkAgentInfo objects that support a given type, but the legacy 504 * API will only see the first one. 505 * 506 * It serves two main purposes: 507 * 508 * 1. Provide information about "the network for a given type" (since this 509 * API only supports one). 510 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 511 * the first network for a given type changes, or if the default network 512 * changes. 513 */ 514 private class LegacyTypeTracker { 515 516 private static final boolean DBG = true; 517 private static final boolean VDBG = false; 518 519 /** 520 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 521 * Each list holds references to all NetworkAgentInfos that are used to 522 * satisfy requests for that network type. 523 * 524 * This array is built out at startup such that an unsupported network 525 * doesn't get an ArrayList instance, making this a tristate: 526 * unsupported, supported but not active and active. 527 * 528 * The actual lists are populated when we scan the network types that 529 * are supported on this device. 530 * 531 * Threading model: 532 * - addSupportedType() is only called in the constructor 533 * - add(), update(), remove() are only called from the ConnectivityService handler thread. 534 * They are therefore not thread-safe with respect to each other. 535 * - getNetworkForType() can be called at any time on binder threads. It is synchronized 536 * on mTypeLists to be thread-safe with respect to a concurrent remove call. 537 * - dump is thread-safe with respect to concurrent add and remove calls. 538 */ 539 private final ArrayList<NetworkAgentInfo> mTypeLists[]; 540 541 public LegacyTypeTracker() { 542 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 543 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 544 } 545 546 public void addSupportedType(int type) { 547 if (mTypeLists[type] != null) { 548 throw new IllegalStateException( 549 "legacy list for type " + type + "already initialized"); 550 } 551 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 552 } 553 554 public boolean isTypeSupported(int type) { 555 return isNetworkTypeValid(type) && mTypeLists[type] != null; 556 } 557 558 public NetworkAgentInfo getNetworkForType(int type) { 559 synchronized (mTypeLists) { 560 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 561 return mTypeLists[type].get(0); 562 } 563 } 564 return null; 565 } 566 567 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 568 boolean isDefaultNetwork) { 569 if (DBG) { 570 log("Sending " + state + 571 " broadcast for type " + type + " " + nai.name() + 572 " isDefaultNetwork=" + isDefaultNetwork); 573 } 574 } 575 576 /** Adds the given network to the specified legacy type list. */ 577 public void add(int type, NetworkAgentInfo nai) { 578 if (!isTypeSupported(type)) { 579 return; // Invalid network type. 580 } 581 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 582 583 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 584 if (list.contains(nai)) { 585 return; 586 } 587 synchronized (mTypeLists) { 588 list.add(nai); 589 } 590 591 // Send a broadcast if this is the first network of its type or if it's the default. 592 final boolean isDefaultNetwork = isDefaultNetwork(nai); 593 if ((list.size() == 1) || isDefaultNetwork) { 594 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 595 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 596 } 597 } 598 599 /** Removes the given network from the specified legacy type list. */ 600 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 601 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 602 if (list == null || list.isEmpty()) { 603 return; 604 } 605 final boolean wasFirstNetwork = list.get(0).equals(nai); 606 607 synchronized (mTypeLists) { 608 if (!list.remove(nai)) { 609 return; 610 } 611 } 612 613 final DetailedState state = DetailedState.DISCONNECTED; 614 615 if (wasFirstNetwork || wasDefault) { 616 maybeLogBroadcast(nai, state, type, wasDefault); 617 sendLegacyNetworkBroadcast(nai, state, type); 618 } 619 620 if (!list.isEmpty() && wasFirstNetwork) { 621 if (DBG) log("Other network available for type " + type + 622 ", sending connected broadcast"); 623 final NetworkAgentInfo replacement = list.get(0); 624 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 625 sendLegacyNetworkBroadcast(replacement, state, type); 626 } 627 } 628 629 /** Removes the given network from all legacy type lists. */ 630 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 631 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 632 for (int type = 0; type < mTypeLists.length; type++) { 633 remove(type, nai, wasDefault); 634 } 635 } 636 637 // send out another legacy broadcast - currently only used for suspend/unsuspend 638 // toggle 639 public void update(NetworkAgentInfo nai) { 640 final boolean isDefault = isDefaultNetwork(nai); 641 final DetailedState state = nai.networkInfo.getDetailedState(); 642 for (int type = 0; type < mTypeLists.length; type++) { 643 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 644 final boolean contains = (list != null && list.contains(nai)); 645 final boolean isFirst = contains && (nai == list.get(0)); 646 if (isFirst || contains && isDefault) { 647 maybeLogBroadcast(nai, state, type, isDefault); 648 sendLegacyNetworkBroadcast(nai, state, type); 649 } 650 } 651 } 652 653 private String naiToString(NetworkAgentInfo nai) { 654 String name = (nai != null) ? nai.name() : "null"; 655 String state = (nai.networkInfo != null) ? 656 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 657 "???/???"; 658 return name + " " + state; 659 } 660 661 public void dump(IndentingPrintWriter pw) { 662 pw.println("mLegacyTypeTracker:"); 663 pw.increaseIndent(); 664 pw.print("Supported types:"); 665 for (int type = 0; type < mTypeLists.length; type++) { 666 if (mTypeLists[type] != null) pw.print(" " + type); 667 } 668 pw.println(); 669 pw.println("Current state:"); 670 pw.increaseIndent(); 671 synchronized (mTypeLists) { 672 for (int type = 0; type < mTypeLists.length; type++) { 673 if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; 674 for (NetworkAgentInfo nai : mTypeLists[type]) { 675 pw.println(type + " " + naiToString(nai)); 676 } 677 } 678 } 679 pw.decreaseIndent(); 680 pw.decreaseIndent(); 681 pw.println(); 682 } 683 } 684 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 685 686 @VisibleForTesting 687 protected HandlerThread createHandlerThread() { 688 return new HandlerThread("ConnectivityServiceThread"); 689 } 690 691 public ConnectivityService(Context context, INetworkManagementService netManager, 692 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 693 this(context, netManager, statsService, policyManager, new IpConnectivityLog()); 694 } 695 696 @VisibleForTesting 697 protected ConnectivityService(Context context, INetworkManagementService netManager, 698 INetworkStatsService statsService, INetworkPolicyManager policyManager, 699 IpConnectivityLog logger) { 700 if (DBG) log("ConnectivityService starting up"); 701 702 mMetricsLog = logger; 703 mDefaultRequest = createInternetRequestForTransport(-1); 704 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); 705 mNetworkRequests.put(mDefaultRequest, defaultNRI); 706 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 707 708 mDefaultMobileDataRequest = createInternetRequestForTransport( 709 NetworkCapabilities.TRANSPORT_CELLULAR); 710 711 mHandlerThread = createHandlerThread(); 712 mHandlerThread.start(); 713 mHandler = new InternalHandler(mHandlerThread.getLooper()); 714 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 715 716 // setup our unique device name 717 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 718 String id = Settings.Secure.getString(context.getContentResolver(), 719 Settings.Secure.ANDROID_ID); 720 if (id != null && id.length() > 0) { 721 String name = new String("android-").concat(id); 722 SystemProperties.set("net.hostname", name); 723 } 724 } 725 726 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 727 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 728 729 mLingerDelayMs = SystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); 730 731 mContext = checkNotNull(context, "missing Context"); 732 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 733 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 734 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 735 mKeyStore = KeyStore.getInstance(); 736 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 737 738 try { 739 mPolicyManager.setConnectivityListener(mPolicyListener); 740 mRestrictBackground = mPolicyManager.getRestrictBackground(); 741 } catch (RemoteException e) { 742 // ouch, no rules updates means some processes may never get network 743 loge("unable to register INetworkPolicyListener" + e); 744 } 745 746 final PowerManager powerManager = (PowerManager) context.getSystemService( 747 Context.POWER_SERVICE); 748 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 749 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 750 com.android.internal.R.integer.config_networkTransitionTimeout); 751 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 752 753 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 754 755 // TODO: What is the "correct" way to do determine if this is a wifi only device? 756 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 757 log("wifiOnly=" + wifiOnly); 758 String[] naStrings = context.getResources().getStringArray( 759 com.android.internal.R.array.networkAttributes); 760 for (String naString : naStrings) { 761 try { 762 NetworkConfig n = new NetworkConfig(naString); 763 if (VDBG) log("naString=" + naString + " config=" + n); 764 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 765 loge("Error in networkAttributes - ignoring attempt to define type " + 766 n.type); 767 continue; 768 } 769 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 770 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 771 n.type); 772 continue; 773 } 774 if (mNetConfigs[n.type] != null) { 775 loge("Error in networkAttributes - ignoring attempt to redefine type " + 776 n.type); 777 continue; 778 } 779 mLegacyTypeTracker.addSupportedType(n.type); 780 781 mNetConfigs[n.type] = n; 782 mNetworksDefined++; 783 } catch(Exception e) { 784 // ignore it - leave the entry null 785 } 786 } 787 788 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 789 if (mNetConfigs[TYPE_VPN] == null) { 790 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 791 // don't need to add TYPE_VPN to mNetConfigs. 792 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 793 mNetworksDefined++; // used only in the log() statement below. 794 } 795 796 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 797 798 mProtectedNetworks = new ArrayList<Integer>(); 799 int[] protectedNetworks = context.getResources().getIntArray( 800 com.android.internal.R.array.config_protectedNetworks); 801 for (int p : protectedNetworks) { 802 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 803 mProtectedNetworks.add(p); 804 } else { 805 if (DBG) loge("Ignoring protectedNetwork " + p); 806 } 807 } 808 809 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 810 && SystemProperties.get("ro.build.type").equals("eng"); 811 812 mTethering = new Tethering(mContext, mNetd, statsService); 813 814 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 815 816 //set up the listener for user state for creating user VPNs 817 IntentFilter intentFilter = new IntentFilter(); 818 intentFilter.addAction(Intent.ACTION_USER_STARTED); 819 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 820 intentFilter.addAction(Intent.ACTION_USER_ADDED); 821 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 822 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 823 mContext.registerReceiverAsUser( 824 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 825 826 try { 827 mNetd.registerObserver(mTethering); 828 mNetd.registerObserver(mDataActivityObserver); 829 } catch (RemoteException e) { 830 loge("Error registering observer :" + e); 831 } 832 833 if (DBG) { 834 mInetLog = new ArrayList(); 835 } 836 837 mSettingsObserver = new SettingsObserver(mContext, mHandler); 838 registerSettingsCallbacks(); 839 840 mDataConnectionStats = new DataConnectionStats(mContext); 841 mDataConnectionStats.startMonitoring(); 842 843 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 844 845 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 846 847 mKeepaliveTracker = new KeepaliveTracker(mHandler); 848 mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager, 849 mContext.getSystemService(NotificationManager.class)); 850 851 final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(), 852 Settings.Global.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT, 853 LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT); 854 final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(), 855 Settings.Global.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS, 856 LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS); 857 mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit); 858 859 mAvoidBadWifiTracker = createAvoidBadWifiTracker( 860 mContext, mHandler, () -> rematchForAvoidBadWifiUpdate()); 861 } 862 863 private NetworkRequest createInternetRequestForTransport(int transportType) { 864 NetworkCapabilities netCap = new NetworkCapabilities(); 865 netCap.addCapability(NET_CAPABILITY_INTERNET); 866 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 867 if (transportType > -1) { 868 netCap.addTransportType(transportType); 869 } 870 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), 871 NetworkRequest.Type.REQUEST); 872 } 873 874 // Used only for testing. 875 // TODO: Delete this and either: 876 // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires 877 // changing ContentResolver to make registerContentObserver non-final). 878 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 879 // by subclassing SettingsObserver. 880 @VisibleForTesting 881 void updateMobileDataAlwaysOn() { 882 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 883 } 884 885 private void handleMobileDataAlwaysOn() { 886 final boolean enable = (Settings.Global.getInt( 887 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 888 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 889 if (enable == isEnabled) { 890 return; // Nothing to do. 891 } 892 893 if (enable) { 894 handleRegisterNetworkRequest(new NetworkRequestInfo( 895 null, mDefaultMobileDataRequest, new Binder())); 896 } else { 897 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 898 } 899 } 900 901 private void registerSettingsCallbacks() { 902 // Watch for global HTTP proxy changes. 903 mSettingsObserver.observe( 904 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 905 EVENT_APPLY_GLOBAL_HTTP_PROXY); 906 907 // Watch for whether or not to keep mobile data always on. 908 mSettingsObserver.observe( 909 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 910 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 911 } 912 913 private synchronized int nextNetworkRequestId() { 914 return mNextNetworkRequestId++; 915 } 916 917 @VisibleForTesting 918 protected int reserveNetId() { 919 synchronized (mNetworkForNetId) { 920 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 921 int netId = mNextNetId; 922 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 923 // Make sure NetID unused. http://b/16815182 924 if (!mNetIdInUse.get(netId)) { 925 mNetIdInUse.put(netId, true); 926 return netId; 927 } 928 } 929 } 930 throw new IllegalStateException("No free netIds"); 931 } 932 933 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 934 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 935 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 936 final NetworkState state; 937 if (nai != null) { 938 state = nai.getNetworkState(); 939 state.networkInfo.setType(networkType); 940 } else { 941 final NetworkInfo info = new NetworkInfo(networkType, 0, 942 getNetworkTypeName(networkType), ""); 943 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 944 info.setIsAvailable(true); 945 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 946 null, null, null); 947 } 948 filterNetworkStateForUid(state, uid, ignoreBlocked); 949 return state; 950 } else { 951 return NetworkState.EMPTY; 952 } 953 } 954 955 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 956 if (network == null) { 957 return null; 958 } 959 synchronized (mNetworkForNetId) { 960 return mNetworkForNetId.get(network.netId); 961 } 962 } 963 964 private Network[] getVpnUnderlyingNetworks(int uid) { 965 if (!mLockdownEnabled) { 966 int user = UserHandle.getUserId(uid); 967 synchronized (mVpns) { 968 Vpn vpn = mVpns.get(user); 969 if (vpn != null && vpn.appliesToUid(uid)) { 970 return vpn.getUnderlyingNetworks(); 971 } 972 } 973 } 974 return null; 975 } 976 977 private NetworkState getUnfilteredActiveNetworkState(int uid) { 978 NetworkAgentInfo nai = getDefaultNetwork(); 979 980 final Network[] networks = getVpnUnderlyingNetworks(uid); 981 if (networks != null) { 982 // getUnderlyingNetworks() returns: 983 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 984 // empty array => the VPN explicitly said "no default network". 985 // non-empty array => the VPN specified one or more default networks; we use the 986 // first one. 987 if (networks.length > 0) { 988 nai = getNetworkAgentInfoForNetwork(networks[0]); 989 } else { 990 nai = null; 991 } 992 } 993 994 if (nai != null) { 995 return nai.getNetworkState(); 996 } else { 997 return NetworkState.EMPTY; 998 } 999 } 1000 1001 /** 1002 * Check if UID should be blocked from using the network with the given LinkProperties. 1003 */ 1004 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 1005 boolean ignoreBlocked) { 1006 // Networks aren't blocked when ignoring blocked status 1007 if (ignoreBlocked) return false; 1008 // Networks are never blocked for system services 1009 if (isSystem(uid)) return false; 1010 1011 final boolean networkMetered; 1012 final int uidRules; 1013 1014 synchronized (mVpns) { 1015 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 1016 if (vpn != null && vpn.isBlockingUid(uid)) { 1017 return true; 1018 } 1019 } 1020 1021 final String iface = (lp == null ? "" : lp.getInterfaceName()); 1022 synchronized (mRulesLock) { 1023 networkMetered = mMeteredIfaces.contains(iface); 1024 uidRules = mUidRules.get(uid, RULE_NONE); 1025 } 1026 1027 boolean allowed = true; 1028 // Check Data Saver Mode first... 1029 if (networkMetered) { 1030 if ((uidRules & RULE_REJECT_METERED) != 0) { 1031 if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); 1032 // Explicitly blacklisted. 1033 allowed = false; 1034 } else { 1035 allowed = !mRestrictBackground 1036 || (uidRules & RULE_ALLOW_METERED) != 0 1037 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; 1038 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1039 + " mRestrictBackground=" + mRestrictBackground 1040 + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) 1041 + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" 1042 + ": " + allowed); 1043 } 1044 } 1045 // ...then power restrictions. 1046 if (allowed) { 1047 allowed = (uidRules & RULE_REJECT_ALL) == 0; 1048 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1049 + " rule is " + uidRulesToString(uidRules) + ": " + allowed); 1050 } 1051 return !allowed; 1052 } 1053 1054 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1055 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1056 return; 1057 } 1058 boolean removed = false; 1059 boolean added = false; 1060 synchronized (mBlockedAppUids) { 1061 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1062 added = true; 1063 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1064 removed = true; 1065 } 1066 } 1067 if (added) { 1068 log("Returning blocked NetworkInfo to uid=" + uid); 1069 mNetworkInfoBlockingLogs.log("BLOCKED " + uid); 1070 } else if (removed) { 1071 log("Returning unblocked NetworkInfo to uid=" + uid); 1072 mNetworkInfoBlockingLogs.log("UNBLOCKED " + uid); 1073 } 1074 } 1075 1076 /** 1077 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1078 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1079 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 1080 * {@link NetworkInfo#isMetered()} based on network policies. 1081 */ 1082 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1083 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1084 1085 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1086 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1087 } 1088 if (mLockdownTracker != null) { 1089 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1090 } 1091 1092 // TODO: apply metered state closer to NetworkAgentInfo 1093 final long token = Binder.clearCallingIdentity(); 1094 try { 1095 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 1096 } catch (RemoteException e) { 1097 } finally { 1098 Binder.restoreCallingIdentity(token); 1099 } 1100 } 1101 1102 /** 1103 * Return NetworkInfo for the active (i.e., connected) network interface. 1104 * It is assumed that at most one network is active at a time. If more 1105 * than one is active, it is indeterminate which will be returned. 1106 * @return the info for the active network, or {@code null} if none is 1107 * active 1108 */ 1109 @Override 1110 public NetworkInfo getActiveNetworkInfo() { 1111 enforceAccessPermission(); 1112 final int uid = Binder.getCallingUid(); 1113 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1114 filterNetworkStateForUid(state, uid, false); 1115 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1116 return state.networkInfo; 1117 } 1118 1119 @Override 1120 public Network getActiveNetwork() { 1121 enforceAccessPermission(); 1122 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1123 } 1124 1125 @Override 1126 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1127 enforceConnectivityInternalPermission(); 1128 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1129 } 1130 1131 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1132 final int user = UserHandle.getUserId(uid); 1133 int vpnNetId = NETID_UNSET; 1134 synchronized (mVpns) { 1135 final Vpn vpn = mVpns.get(user); 1136 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1137 } 1138 NetworkAgentInfo nai; 1139 if (vpnNetId != NETID_UNSET) { 1140 synchronized (mNetworkForNetId) { 1141 nai = mNetworkForNetId.get(vpnNetId); 1142 } 1143 if (nai != null) return nai.network; 1144 } 1145 nai = getDefaultNetwork(); 1146 if (nai != null 1147 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1148 nai = null; 1149 } 1150 return nai != null ? nai.network : null; 1151 } 1152 1153 // Public because it's used by mLockdownTracker. 1154 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1155 enforceAccessPermission(); 1156 final int uid = Binder.getCallingUid(); 1157 NetworkState state = getUnfilteredActiveNetworkState(uid); 1158 return state.networkInfo; 1159 } 1160 1161 @Override 1162 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1163 enforceConnectivityInternalPermission(); 1164 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1165 filterNetworkStateForUid(state, uid, ignoreBlocked); 1166 return state.networkInfo; 1167 } 1168 1169 @Override 1170 public NetworkInfo getNetworkInfo(int networkType) { 1171 enforceAccessPermission(); 1172 final int uid = Binder.getCallingUid(); 1173 if (getVpnUnderlyingNetworks(uid) != null) { 1174 // A VPN is active, so we may need to return one of its underlying networks. This 1175 // information is not available in LegacyTypeTracker, so we have to get it from 1176 // getUnfilteredActiveNetworkState. 1177 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1178 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1179 filterNetworkStateForUid(state, uid, false); 1180 return state.networkInfo; 1181 } 1182 } 1183 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1184 return state.networkInfo; 1185 } 1186 1187 @Override 1188 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1189 enforceAccessPermission(); 1190 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1191 if (nai != null) { 1192 final NetworkState state = nai.getNetworkState(); 1193 filterNetworkStateForUid(state, uid, ignoreBlocked); 1194 return state.networkInfo; 1195 } else { 1196 return null; 1197 } 1198 } 1199 1200 @Override 1201 public NetworkInfo[] getAllNetworkInfo() { 1202 enforceAccessPermission(); 1203 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1204 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1205 networkType++) { 1206 NetworkInfo info = getNetworkInfo(networkType); 1207 if (info != null) { 1208 result.add(info); 1209 } 1210 } 1211 return result.toArray(new NetworkInfo[result.size()]); 1212 } 1213 1214 @Override 1215 public Network getNetworkForType(int networkType) { 1216 enforceAccessPermission(); 1217 final int uid = Binder.getCallingUid(); 1218 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1219 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1220 return state.network; 1221 } 1222 return null; 1223 } 1224 1225 @Override 1226 public Network[] getAllNetworks() { 1227 enforceAccessPermission(); 1228 synchronized (mNetworkForNetId) { 1229 final Network[] result = new Network[mNetworkForNetId.size()]; 1230 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1231 result[i] = mNetworkForNetId.valueAt(i).network; 1232 } 1233 return result; 1234 } 1235 } 1236 1237 @Override 1238 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1239 // The basic principle is: if an app's traffic could possibly go over a 1240 // network, without the app doing anything multinetwork-specific, 1241 // (hence, by "default"), then include that network's capabilities in 1242 // the array. 1243 // 1244 // In the normal case, app traffic only goes over the system's default 1245 // network connection, so that's the only network returned. 1246 // 1247 // With a VPN in force, some app traffic may go into the VPN, and thus 1248 // over whatever underlying networks the VPN specifies, while other app 1249 // traffic may go over the system default network (e.g.: a split-tunnel 1250 // VPN, or an app disallowed by the VPN), so the set of networks 1251 // returned includes the VPN's underlying networks and the system 1252 // default. 1253 enforceAccessPermission(); 1254 1255 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1256 1257 NetworkAgentInfo nai = getDefaultNetwork(); 1258 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1259 if (nc != null) { 1260 result.put(nai.network, nc); 1261 } 1262 1263 if (!mLockdownEnabled) { 1264 synchronized (mVpns) { 1265 Vpn vpn = mVpns.get(userId); 1266 if (vpn != null) { 1267 Network[] networks = vpn.getUnderlyingNetworks(); 1268 if (networks != null) { 1269 for (Network network : networks) { 1270 nai = getNetworkAgentInfoForNetwork(network); 1271 nc = getNetworkCapabilitiesInternal(nai); 1272 if (nc != null) { 1273 result.put(network, nc); 1274 } 1275 } 1276 } 1277 } 1278 } 1279 } 1280 1281 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1282 out = result.values().toArray(out); 1283 return out; 1284 } 1285 1286 @Override 1287 public boolean isNetworkSupported(int networkType) { 1288 enforceAccessPermission(); 1289 return mLegacyTypeTracker.isTypeSupported(networkType); 1290 } 1291 1292 /** 1293 * Return LinkProperties for the active (i.e., connected) default 1294 * network interface. It is assumed that at most one default network 1295 * is active at a time. If more than one is active, it is indeterminate 1296 * which will be returned. 1297 * @return the ip properties for the active network, or {@code null} if 1298 * none is active 1299 */ 1300 @Override 1301 public LinkProperties getActiveLinkProperties() { 1302 enforceAccessPermission(); 1303 final int uid = Binder.getCallingUid(); 1304 NetworkState state = getUnfilteredActiveNetworkState(uid); 1305 return state.linkProperties; 1306 } 1307 1308 @Override 1309 public LinkProperties getLinkPropertiesForType(int networkType) { 1310 enforceAccessPermission(); 1311 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1312 if (nai != null) { 1313 synchronized (nai) { 1314 return new LinkProperties(nai.linkProperties); 1315 } 1316 } 1317 return null; 1318 } 1319 1320 // TODO - this should be ALL networks 1321 @Override 1322 public LinkProperties getLinkProperties(Network network) { 1323 enforceAccessPermission(); 1324 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1325 if (nai != null) { 1326 synchronized (nai) { 1327 return new LinkProperties(nai.linkProperties); 1328 } 1329 } 1330 return null; 1331 } 1332 1333 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1334 if (nai != null) { 1335 synchronized (nai) { 1336 if (nai.networkCapabilities != null) { 1337 return new NetworkCapabilities(nai.networkCapabilities); 1338 } 1339 } 1340 } 1341 return null; 1342 } 1343 1344 @Override 1345 public NetworkCapabilities getNetworkCapabilities(Network network) { 1346 enforceAccessPermission(); 1347 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1348 } 1349 1350 @Override 1351 public NetworkState[] getAllNetworkState() { 1352 // Require internal since we're handing out IMSI details 1353 enforceConnectivityInternalPermission(); 1354 1355 final ArrayList<NetworkState> result = Lists.newArrayList(); 1356 for (Network network : getAllNetworks()) { 1357 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1358 if (nai != null) { 1359 result.add(nai.getNetworkState()); 1360 } 1361 } 1362 return result.toArray(new NetworkState[result.size()]); 1363 } 1364 1365 @Override 1366 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1367 enforceAccessPermission(); 1368 final int uid = Binder.getCallingUid(); 1369 final long token = Binder.clearCallingIdentity(); 1370 try { 1371 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1372 if (state.networkInfo != null) { 1373 try { 1374 return mPolicyManager.getNetworkQuotaInfo(state); 1375 } catch (RemoteException e) { 1376 } 1377 } 1378 return null; 1379 } finally { 1380 Binder.restoreCallingIdentity(token); 1381 } 1382 } 1383 1384 @Override 1385 public boolean isActiveNetworkMetered() { 1386 enforceAccessPermission(); 1387 1388 final NetworkInfo info = getActiveNetworkInfo(); 1389 return (info != null) ? info.isMetered() : false; 1390 } 1391 1392 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1393 @Override 1394 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1395 int deviceType = Integer.parseInt(label); 1396 sendDataActivityBroadcast(deviceType, active, tsNanos); 1397 } 1398 }; 1399 1400 /** 1401 * Ensure that a network route exists to deliver traffic to the specified 1402 * host via the specified network interface. 1403 * @param networkType the type of the network over which traffic to the 1404 * specified host is to be routed 1405 * @param hostAddress the IP address of the host to which the route is 1406 * desired 1407 * @return {@code true} on success, {@code false} on failure 1408 */ 1409 @Override 1410 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1411 enforceChangePermission(); 1412 if (mProtectedNetworks.contains(networkType)) { 1413 enforceConnectivityInternalPermission(); 1414 } 1415 1416 InetAddress addr; 1417 try { 1418 addr = InetAddress.getByAddress(hostAddress); 1419 } catch (UnknownHostException e) { 1420 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1421 return false; 1422 } 1423 1424 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1425 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1426 return false; 1427 } 1428 1429 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1430 if (nai == null) { 1431 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1432 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1433 } else { 1434 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1435 } 1436 return false; 1437 } 1438 1439 DetailedState netState; 1440 synchronized (nai) { 1441 netState = nai.networkInfo.getDetailedState(); 1442 } 1443 1444 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1445 if (VDBG) { 1446 log("requestRouteToHostAddress on down network " 1447 + "(" + networkType + ") - dropped" 1448 + " netState=" + netState); 1449 } 1450 return false; 1451 } 1452 1453 final int uid = Binder.getCallingUid(); 1454 final long token = Binder.clearCallingIdentity(); 1455 try { 1456 LinkProperties lp; 1457 int netId; 1458 synchronized (nai) { 1459 lp = nai.linkProperties; 1460 netId = nai.network.netId; 1461 } 1462 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1463 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1464 return ok; 1465 } finally { 1466 Binder.restoreCallingIdentity(token); 1467 } 1468 } 1469 1470 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1471 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1472 if (bestRoute == null) { 1473 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1474 } else { 1475 String iface = bestRoute.getInterface(); 1476 if (bestRoute.getGateway().equals(addr)) { 1477 // if there is no better route, add the implied hostroute for our gateway 1478 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1479 } else { 1480 // if we will connect to this through another route, add a direct route 1481 // to it's gateway 1482 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1483 } 1484 } 1485 if (DBG) log("Adding legacy route " + bestRoute + 1486 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1487 try { 1488 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1489 } catch (Exception e) { 1490 // never crash - catch them all 1491 if (DBG) loge("Exception trying to add a route: " + e); 1492 return false; 1493 } 1494 return true; 1495 } 1496 1497 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1498 @Override 1499 public void onUidRulesChanged(int uid, int uidRules) { 1500 // caller is NPMS, since we only register with them 1501 if (LOGD_RULES) { 1502 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1503 } 1504 1505 synchronized (mRulesLock) { 1506 // skip update when we've already applied rules 1507 final int oldRules = mUidRules.get(uid, RULE_NONE); 1508 if (oldRules == uidRules) return; 1509 1510 if (uidRules == RULE_NONE) { 1511 mUidRules.delete(uid); 1512 } else { 1513 mUidRules.put(uid, uidRules); 1514 } 1515 } 1516 1517 // TODO: notify UID when it has requested targeted updates 1518 } 1519 1520 @Override 1521 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1522 // caller is NPMS, since we only register with them 1523 if (LOGD_RULES) { 1524 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1525 } 1526 1527 synchronized (mRulesLock) { 1528 mMeteredIfaces.clear(); 1529 for (String iface : meteredIfaces) { 1530 mMeteredIfaces.add(iface); 1531 } 1532 } 1533 } 1534 1535 @Override 1536 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1537 // caller is NPMS, since we only register with them 1538 if (LOGD_RULES) { 1539 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1540 } 1541 1542 synchronized (mRulesLock) { 1543 mRestrictBackground = restrictBackground; 1544 } 1545 1546 if (restrictBackground) { 1547 log("onRestrictBackgroundChanged(true): disabling tethering"); 1548 mTethering.untetherAll(); 1549 } 1550 } 1551 1552 @Override 1553 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1554 if (LOGD_RULES) { 1555 // caller is NPMS, since we only register with them 1556 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1557 + whitelisted + ")"); 1558 } 1559 } 1560 @Override 1561 public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { 1562 if (LOGD_RULES) { 1563 // caller is NPMS, since we only register with them 1564 log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" 1565 + blacklisted + ")"); 1566 } 1567 } 1568 }; 1569 1570 /** 1571 * Require that the caller is either in the same user or has appropriate permission to interact 1572 * across users. 1573 * 1574 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1575 */ 1576 private void enforceCrossUserPermission(int userId) { 1577 if (userId == UserHandle.getCallingUserId()) { 1578 // Not a cross-user call. 1579 return; 1580 } 1581 mContext.enforceCallingOrSelfPermission( 1582 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1583 "ConnectivityService"); 1584 } 1585 1586 private void enforceInternetPermission() { 1587 mContext.enforceCallingOrSelfPermission( 1588 android.Manifest.permission.INTERNET, 1589 "ConnectivityService"); 1590 } 1591 1592 private void enforceAccessPermission() { 1593 mContext.enforceCallingOrSelfPermission( 1594 android.Manifest.permission.ACCESS_NETWORK_STATE, 1595 "ConnectivityService"); 1596 } 1597 1598 private void enforceChangePermission() { 1599 ConnectivityManager.enforceChangePermission(mContext); 1600 } 1601 1602 private void enforceTetherAccessPermission() { 1603 mContext.enforceCallingOrSelfPermission( 1604 android.Manifest.permission.ACCESS_NETWORK_STATE, 1605 "ConnectivityService"); 1606 } 1607 1608 private void enforceConnectivityInternalPermission() { 1609 mContext.enforceCallingOrSelfPermission( 1610 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1611 "ConnectivityService"); 1612 } 1613 1614 private void enforceConnectivityRestrictedNetworksPermission() { 1615 try { 1616 mContext.enforceCallingOrSelfPermission( 1617 android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, 1618 "ConnectivityService"); 1619 return; 1620 } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } 1621 enforceConnectivityInternalPermission(); 1622 } 1623 1624 private void enforceKeepalivePermission() { 1625 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1626 } 1627 1628 // Public because it's used by mLockdownTracker. 1629 public void sendConnectedBroadcast(NetworkInfo info) { 1630 enforceConnectivityInternalPermission(); 1631 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1632 } 1633 1634 private void sendInetConditionBroadcast(NetworkInfo info) { 1635 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1636 } 1637 1638 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1639 if (mLockdownTracker != null) { 1640 info = new NetworkInfo(info); 1641 mLockdownTracker.augmentNetworkInfo(info); 1642 } 1643 1644 Intent intent = new Intent(bcastType); 1645 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1646 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1647 if (info.isFailover()) { 1648 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1649 info.setFailover(false); 1650 } 1651 if (info.getReason() != null) { 1652 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1653 } 1654 if (info.getExtraInfo() != null) { 1655 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1656 info.getExtraInfo()); 1657 } 1658 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1659 return intent; 1660 } 1661 1662 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1663 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1664 } 1665 1666 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1667 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1668 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1669 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1670 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1671 final long ident = Binder.clearCallingIdentity(); 1672 try { 1673 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1674 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1675 } finally { 1676 Binder.restoreCallingIdentity(ident); 1677 } 1678 } 1679 1680 private void sendStickyBroadcast(Intent intent) { 1681 synchronized(this) { 1682 if (!mSystemReady) { 1683 mInitialBroadcast = new Intent(intent); 1684 } 1685 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1686 if (VDBG) { 1687 log("sendStickyBroadcast: action=" + intent.getAction()); 1688 } 1689 1690 Bundle options = null; 1691 final long ident = Binder.clearCallingIdentity(); 1692 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1693 final NetworkInfo ni = intent.getParcelableExtra( 1694 ConnectivityManager.EXTRA_NETWORK_INFO); 1695 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1696 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1697 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1698 } else { 1699 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1700 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1701 options = opts.toBundle(); 1702 } 1703 final IBatteryStats bs = BatteryStatsService.getService(); 1704 try { 1705 bs.noteConnectivityChanged(intent.getIntExtra( 1706 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1707 ni != null ? ni.getState().toString() : "?"); 1708 } catch (RemoteException e) { 1709 } 1710 } 1711 try { 1712 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1713 } finally { 1714 Binder.restoreCallingIdentity(ident); 1715 } 1716 } 1717 } 1718 1719 void systemReady() { 1720 loadGlobalProxy(); 1721 1722 synchronized(this) { 1723 mSystemReady = true; 1724 if (mInitialBroadcast != null) { 1725 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1726 mInitialBroadcast = null; 1727 } 1728 } 1729 // load the global proxy at startup 1730 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1731 1732 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1733 // for user to unlock device too. 1734 updateLockdownVpn(); 1735 1736 // Configure whether mobile data is always on. 1737 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1738 1739 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1740 1741 mPermissionMonitor.startMonitoring(); 1742 } 1743 1744 /** 1745 * Setup data activity tracking for the given network. 1746 * 1747 * Every {@code setupDataActivityTracking} should be paired with a 1748 * {@link #removeDataActivityTracking} for cleanup. 1749 */ 1750 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1751 final String iface = networkAgent.linkProperties.getInterfaceName(); 1752 1753 final int timeout; 1754 int type = ConnectivityManager.TYPE_NONE; 1755 1756 if (networkAgent.networkCapabilities.hasTransport( 1757 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1758 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1759 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1760 10); 1761 type = ConnectivityManager.TYPE_MOBILE; 1762 } else if (networkAgent.networkCapabilities.hasTransport( 1763 NetworkCapabilities.TRANSPORT_WIFI)) { 1764 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1765 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1766 15); 1767 type = ConnectivityManager.TYPE_WIFI; 1768 } else { 1769 // do not track any other networks 1770 timeout = 0; 1771 } 1772 1773 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1774 try { 1775 mNetd.addIdleTimer(iface, timeout, type); 1776 } catch (Exception e) { 1777 // You shall not crash! 1778 loge("Exception in setupDataActivityTracking " + e); 1779 } 1780 } 1781 } 1782 1783 /** 1784 * Remove data activity tracking when network disconnects. 1785 */ 1786 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1787 final String iface = networkAgent.linkProperties.getInterfaceName(); 1788 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1789 1790 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1791 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1792 try { 1793 // the call fails silently if no idletimer setup for this interface 1794 mNetd.removeIdleTimer(iface); 1795 } catch (Exception e) { 1796 loge("Exception in removeDataActivityTracking " + e); 1797 } 1798 } 1799 } 1800 1801 /** 1802 * Reads the network specific MTU size from reources. 1803 * and set it on it's iface. 1804 */ 1805 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1806 final String iface = newLp.getInterfaceName(); 1807 final int mtu = newLp.getMtu(); 1808 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1809 if (VDBG) log("identical MTU - not setting"); 1810 return; 1811 } 1812 1813 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1814 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1815 return; 1816 } 1817 1818 // Cannot set MTU without interface name 1819 if (TextUtils.isEmpty(iface)) { 1820 loge("Setting MTU size with null iface."); 1821 return; 1822 } 1823 1824 try { 1825 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1826 mNetd.setMtu(iface, mtu); 1827 } catch (Exception e) { 1828 Slog.e(TAG, "exception in setMtu()" + e); 1829 } 1830 } 1831 1832 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1833 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1834 1835 // Overridden for testing purposes to avoid writing to SystemProperties. 1836 @VisibleForTesting 1837 protected int getDefaultTcpRwnd() { 1838 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1839 } 1840 1841 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1842 if (isDefaultNetwork(nai) == false) { 1843 return; 1844 } 1845 1846 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1847 String[] values = null; 1848 if (tcpBufferSizes != null) { 1849 values = tcpBufferSizes.split(","); 1850 } 1851 1852 if (values == null || values.length != 6) { 1853 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1854 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1855 values = tcpBufferSizes.split(","); 1856 } 1857 1858 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1859 1860 try { 1861 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1862 1863 final String prefix = "/sys/kernel/ipv4/tcp_"; 1864 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1865 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1866 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1867 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1868 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1869 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1870 mCurrentTcpBufferSizes = tcpBufferSizes; 1871 } catch (IOException e) { 1872 loge("Can't set TCP buffer sizes:" + e); 1873 } 1874 1875 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1876 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1877 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1878 if (rwndValue != 0) { 1879 SystemProperties.set(sysctlKey, rwndValue.toString()); 1880 } 1881 } 1882 1883 private void flushVmDnsCache() { 1884 /* 1885 * Tell the VMs to toss their DNS caches 1886 */ 1887 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1888 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1889 /* 1890 * Connectivity events can happen before boot has completed ... 1891 */ 1892 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1893 final long ident = Binder.clearCallingIdentity(); 1894 try { 1895 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1896 } finally { 1897 Binder.restoreCallingIdentity(ident); 1898 } 1899 } 1900 1901 @Override 1902 public int getRestoreDefaultNetworkDelay(int networkType) { 1903 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1904 NETWORK_RESTORE_DELAY_PROP_NAME); 1905 if(restoreDefaultNetworkDelayStr != null && 1906 restoreDefaultNetworkDelayStr.length() != 0) { 1907 try { 1908 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1909 } catch (NumberFormatException e) { 1910 } 1911 } 1912 // if the system property isn't set, use the value for the apn type 1913 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1914 1915 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1916 (mNetConfigs[networkType] != null)) { 1917 ret = mNetConfigs[networkType].restoreTime; 1918 } 1919 return ret; 1920 } 1921 1922 private boolean argsContain(String[] args, String target) { 1923 for (String arg : args) { 1924 if (arg.equals(target)) return true; 1925 } 1926 return false; 1927 } 1928 1929 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1930 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1931 final long DIAG_TIME_MS = 5000; 1932 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1933 // Start gathering diagnostic information. 1934 netDiags.add(new NetworkDiagnostics( 1935 nai.network, 1936 new LinkProperties(nai.linkProperties), // Must be a copy. 1937 DIAG_TIME_MS)); 1938 } 1939 1940 for (NetworkDiagnostics netDiag : netDiags) { 1941 pw.println(); 1942 netDiag.waitForMeasurements(); 1943 netDiag.dump(pw); 1944 } 1945 } 1946 1947 @Override 1948 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1949 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1950 if (mContext.checkCallingOrSelfPermission( 1951 android.Manifest.permission.DUMP) 1952 != PackageManager.PERMISSION_GRANTED) { 1953 pw.println("Permission Denial: can't dump ConnectivityService " + 1954 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1955 Binder.getCallingUid()); 1956 return; 1957 } 1958 1959 if (argsContain(args, "--diag")) { 1960 dumpNetworkDiagnostics(pw); 1961 return; 1962 } 1963 1964 pw.print("NetworkFactories for:"); 1965 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1966 pw.print(" " + nfi.name); 1967 } 1968 pw.println(); 1969 pw.println(); 1970 1971 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1972 pw.print("Active default network: "); 1973 if (defaultNai == null) { 1974 pw.println("none"); 1975 } else { 1976 pw.println(defaultNai.network.netId); 1977 } 1978 pw.println(); 1979 1980 pw.println("Current Networks:"); 1981 pw.increaseIndent(); 1982 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1983 pw.println(nai.toString()); 1984 pw.increaseIndent(); 1985 pw.println(String.format("Requests: %d request/%d total", 1986 nai.numRequestNetworkRequests(), nai.numNetworkRequests())); 1987 pw.increaseIndent(); 1988 for (int i = 0; i < nai.numNetworkRequests(); i++) { 1989 pw.println(nai.requestAt(i).toString()); 1990 } 1991 pw.decreaseIndent(); 1992 pw.println("Lingered:"); 1993 pw.increaseIndent(); 1994 nai.dumpLingerTimers(pw); 1995 pw.decreaseIndent(); 1996 pw.decreaseIndent(); 1997 } 1998 pw.decreaseIndent(); 1999 pw.println(); 2000 2001 pw.println("Metered Interfaces:"); 2002 pw.increaseIndent(); 2003 for (String value : mMeteredIfaces) { 2004 pw.println(value); 2005 } 2006 pw.decreaseIndent(); 2007 pw.println(); 2008 2009 pw.print("Restrict background: "); 2010 pw.println(mRestrictBackground); 2011 pw.println(); 2012 2013 pw.println("Status for known UIDs:"); 2014 pw.increaseIndent(); 2015 final int size = mUidRules.size(); 2016 for (int i = 0; i < size; i++) { 2017 final int uid = mUidRules.keyAt(i); 2018 pw.print("UID="); 2019 pw.print(uid); 2020 final int uidRules = mUidRules.get(uid, RULE_NONE); 2021 pw.print(" rules="); 2022 pw.print(uidRulesToString(uidRules)); 2023 pw.println(); 2024 } 2025 pw.println(); 2026 pw.decreaseIndent(); 2027 2028 pw.println("Network Requests:"); 2029 pw.increaseIndent(); 2030 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2031 pw.println(nri.toString()); 2032 } 2033 pw.println(); 2034 pw.decreaseIndent(); 2035 2036 mLegacyTypeTracker.dump(pw); 2037 2038 synchronized (this) { 2039 pw.print("mNetTransitionWakeLock: currently " + 2040 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 2041 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 2042 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 2043 } else { 2044 pw.println(", last requested never"); 2045 } 2046 } 2047 2048 pw.println(); 2049 mTethering.dump(fd, pw, args); 2050 2051 pw.println(); 2052 mKeepaliveTracker.dump(pw); 2053 2054 pw.println(); 2055 dumpAvoidBadWifiSettings(pw); 2056 2057 pw.println(); 2058 if (mInetLog != null && mInetLog.size() > 0) { 2059 pw.println(); 2060 pw.println("Inet condition reports:"); 2061 pw.increaseIndent(); 2062 for(int i = 0; i < mInetLog.size(); i++) { 2063 pw.println(mInetLog.get(i)); 2064 } 2065 pw.decreaseIndent(); 2066 } 2067 2068 if (argsContain(args, "--short") == false) { 2069 pw.println(); 2070 synchronized (mValidationLogs) { 2071 pw.println("mValidationLogs (most recent first):"); 2072 for (ValidationLog p : mValidationLogs) { 2073 pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); 2074 pw.increaseIndent(); 2075 p.mLog.dump(fd, pw, args); 2076 pw.decreaseIndent(); 2077 } 2078 } 2079 2080 pw.println(); 2081 pw.println("mNetworkRequestInfoLogs (most recent first):"); 2082 pw.increaseIndent(); 2083 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 2084 pw.decreaseIndent(); 2085 2086 pw.println(); 2087 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 2088 pw.increaseIndent(); 2089 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 2090 pw.decreaseIndent(); 2091 } 2092 } 2093 2094 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 2095 if (nai.network == null) return false; 2096 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 2097 if (officialNai != null && officialNai.equals(nai)) return true; 2098 if (officialNai != null || VDBG) { 2099 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 2100 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 2101 " - " + nai); 2102 } 2103 return false; 2104 } 2105 2106 // must be stateless - things change under us. 2107 private class NetworkStateTrackerHandler extends Handler { 2108 public NetworkStateTrackerHandler(Looper looper) { 2109 super(looper); 2110 } 2111 2112 private boolean maybeHandleAsyncChannelMessage(Message msg) { 2113 switch (msg.what) { 2114 default: 2115 return false; 2116 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2117 handleAsyncChannelHalfConnect(msg); 2118 break; 2119 } 2120 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2121 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2122 if (nai != null) nai.asyncChannel.disconnect(); 2123 break; 2124 } 2125 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2126 handleAsyncChannelDisconnected(msg); 2127 break; 2128 } 2129 } 2130 return true; 2131 } 2132 2133 private void maybeHandleNetworkAgentMessage(Message msg) { 2134 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2135 if (nai == null) { 2136 if (VDBG) { 2137 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 2138 log(String.format("%s from unknown NetworkAgent", what)); 2139 } 2140 return; 2141 } 2142 2143 switch (msg.what) { 2144 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2145 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2146 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2147 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 2148 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2149 } 2150 if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( 2151 networkCapabilities)) { 2152 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 2153 + nai.networkCapabilities + " -> " + networkCapabilities); 2154 } 2155 updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities); 2156 break; 2157 } 2158 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2159 if (VDBG) { 2160 log("Update of LinkProperties for " + nai.name() + 2161 "; created=" + nai.created + 2162 "; everConnected=" + nai.everConnected); 2163 } 2164 LinkProperties oldLp = nai.linkProperties; 2165 synchronized (nai) { 2166 nai.linkProperties = (LinkProperties)msg.obj; 2167 } 2168 if (nai.everConnected) updateLinkProperties(nai, oldLp); 2169 break; 2170 } 2171 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2172 NetworkInfo info = (NetworkInfo) msg.obj; 2173 updateNetworkInfo(nai, info); 2174 break; 2175 } 2176 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2177 Integer score = (Integer) msg.obj; 2178 if (score != null) updateNetworkScore(nai, score.intValue()); 2179 break; 2180 } 2181 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2182 try { 2183 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2184 } catch (Exception e) { 2185 // Never crash! 2186 loge("Exception in addVpnUidRanges: " + e); 2187 } 2188 break; 2189 } 2190 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2191 try { 2192 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2193 } catch (Exception e) { 2194 // Never crash! 2195 loge("Exception in removeVpnUidRanges: " + e); 2196 } 2197 break; 2198 } 2199 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2200 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2201 loge("ERROR: already-connected network explicitly selected."); 2202 } 2203 nai.networkMisc.explicitlySelected = true; 2204 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2205 break; 2206 } 2207 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2208 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2209 break; 2210 } 2211 } 2212 } 2213 2214 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2215 switch (msg.what) { 2216 default: 2217 return false; 2218 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2219 final NetworkAgentInfo nai; 2220 synchronized (mNetworkForNetId) { 2221 nai = mNetworkForNetId.get(msg.arg2); 2222 } 2223 if (nai != null) { 2224 final boolean valid = 2225 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2226 final boolean wasValidated = nai.lastValidated; 2227 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2228 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2229 if (valid != nai.lastValidated) { 2230 final int oldScore = nai.getCurrentScore(); 2231 nai.lastValidated = valid; 2232 nai.everValidated |= valid; 2233 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2234 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2235 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2236 } 2237 updateInetCondition(nai); 2238 // Let the NetworkAgent know the state of its network 2239 Bundle redirectUrlBundle = new Bundle(); 2240 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2241 nai.asyncChannel.sendMessage( 2242 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2243 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2244 0, redirectUrlBundle); 2245 if (wasValidated && !nai.lastValidated) { 2246 handleNetworkUnvalidated(nai); 2247 } 2248 } 2249 break; 2250 } 2251 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2252 final int netId = msg.arg2; 2253 final boolean visible = (msg.arg1 != 0); 2254 final NetworkAgentInfo nai; 2255 synchronized (mNetworkForNetId) { 2256 nai = mNetworkForNetId.get(netId); 2257 } 2258 // If captive portal status has changed, update capabilities. 2259 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2260 final int oldScore = nai.getCurrentScore(); 2261 nai.lastCaptivePortalDetected = visible; 2262 nai.everCaptivePortalDetected |= visible; 2263 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2264 } 2265 if (!visible) { 2266 mNotifier.clearNotification(netId); 2267 } else { 2268 if (nai == null) { 2269 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2270 break; 2271 } 2272 if (!nai.networkMisc.provisioningNotificationDisabled) { 2273 mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null, 2274 (PendingIntent) msg.obj, nai.networkMisc.explicitlySelected); 2275 } 2276 } 2277 break; 2278 } 2279 } 2280 return true; 2281 } 2282 2283 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2284 switch (msg.what) { 2285 default: 2286 return false; 2287 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2288 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2289 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2290 handleLingerComplete(nai); 2291 } 2292 break; 2293 } 2294 } 2295 return true; 2296 } 2297 2298 @Override 2299 public void handleMessage(Message msg) { 2300 if (!maybeHandleAsyncChannelMessage(msg) && 2301 !maybeHandleNetworkMonitorMessage(msg) && 2302 !maybeHandleNetworkAgentInfoMessage(msg)) { 2303 maybeHandleNetworkAgentMessage(msg); 2304 } 2305 } 2306 } 2307 2308 private void updateLingerState(NetworkAgentInfo nai, long now) { 2309 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2310 // 2. If the network was lingering and there are now requests, unlinger it. 2311 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2312 // one lingered request, start lingering. 2313 nai.updateLingerTimer(); 2314 if (nai.isLingering() && nai.numRequestNetworkRequests() > 0) { 2315 if (DBG) log("Unlingering " + nai.name()); 2316 nai.unlinger(); 2317 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2318 } else if (unneeded(nai) && nai.getLingerExpiry() > 0) { // unneeded() calls isLingering() 2319 int lingerTime = (int) (nai.getLingerExpiry() - now); 2320 if (DBG) { 2321 Log.d(TAG, "Lingering " + nai.name() + " for " + lingerTime + "ms"); 2322 } 2323 nai.linger(); 2324 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2325 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2326 } 2327 } 2328 2329 private void handleAsyncChannelHalfConnect(Message msg) { 2330 AsyncChannel ac = (AsyncChannel) msg.obj; 2331 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2332 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2333 if (VDBG) log("NetworkFactory connected"); 2334 // A network factory has connected. Send it all current NetworkRequests. 2335 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2336 if (nri.request.isListen()) continue; 2337 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2338 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2339 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2340 } 2341 } else { 2342 loge("Error connecting NetworkFactory"); 2343 mNetworkFactoryInfos.remove(msg.obj); 2344 } 2345 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2346 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2347 if (VDBG) log("NetworkAgent connected"); 2348 // A network agent has requested a connection. Establish the connection. 2349 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2350 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2351 } else { 2352 loge("Error connecting NetworkAgent"); 2353 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2354 if (nai != null) { 2355 final boolean wasDefault = isDefaultNetwork(nai); 2356 synchronized (mNetworkForNetId) { 2357 mNetworkForNetId.remove(nai.network.netId); 2358 mNetIdInUse.delete(nai.network.netId); 2359 } 2360 // Just in case. 2361 mLegacyTypeTracker.remove(nai, wasDefault); 2362 } 2363 } 2364 } 2365 } 2366 2367 private void handleAsyncChannelDisconnected(Message msg) { 2368 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2369 if (nai != null) { 2370 if (DBG) { 2371 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2372 } 2373 // A network agent has disconnected. 2374 // TODO - if we move the logic to the network agent (have them disconnect 2375 // because they lost all their requests or because their score isn't good) 2376 // then they would disconnect organically, report their new state and then 2377 // disconnect the channel. 2378 if (nai.networkInfo.isConnected()) { 2379 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2380 null, null); 2381 } 2382 final boolean wasDefault = isDefaultNetwork(nai); 2383 if (wasDefault) { 2384 mDefaultInetConditionPublished = 0; 2385 // Log default network disconnection before required book-keeping. 2386 // Let rematchAllNetworksAndRequests() below record a new default network event 2387 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2388 // whose timestamps tell how long it takes to recover a default network. 2389 logDefaultNetworkEvent(null, nai); 2390 } 2391 notifyIfacesChangedForNetworkStats(); 2392 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2393 // by other networks that are already connected. Perhaps that can be done by 2394 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2395 // of rematchAllNetworksAndRequests 2396 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2397 mKeepaliveTracker.handleStopAllKeepalives(nai, 2398 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2399 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2400 mNetworkAgentInfos.remove(msg.replyTo); 2401 updateClat(null, nai.linkProperties, nai); 2402 synchronized (mNetworkForNetId) { 2403 // Remove the NetworkAgent, but don't mark the netId as 2404 // available until we've told netd to delete it below. 2405 mNetworkForNetId.remove(nai.network.netId); 2406 } 2407 // Remove all previously satisfied requests. 2408 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2409 NetworkRequest request = nai.requestAt(i); 2410 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2411 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2412 mNetworkForRequestId.remove(request.requestId); 2413 sendUpdatedScoreToFactories(request, 0); 2414 } 2415 } 2416 nai.clearLingerState(); 2417 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2418 removeDataActivityTracking(nai); 2419 notifyLockdownVpn(nai); 2420 requestNetworkTransitionWakelock(nai.name()); 2421 } 2422 mLegacyTypeTracker.remove(nai, wasDefault); 2423 rematchAllNetworksAndRequests(null, 0); 2424 mLingerMonitor.noteDisconnect(nai); 2425 if (nai.created) { 2426 // Tell netd to clean up the configuration for this network 2427 // (routing rules, DNS, etc). 2428 // This may be slow as it requires a lot of netd shelling out to ip and 2429 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2430 // after we've rematched networks with requests which should make a potential 2431 // fallback network the default or requested a new network from the 2432 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2433 // long time. 2434 try { 2435 mNetd.removeNetwork(nai.network.netId); 2436 } catch (Exception e) { 2437 loge("Exception removing network: " + e); 2438 } 2439 } 2440 synchronized (mNetworkForNetId) { 2441 mNetIdInUse.delete(nai.network.netId); 2442 } 2443 } else { 2444 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2445 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2446 } 2447 } 2448 2449 // If this method proves to be too slow then we can maintain a separate 2450 // pendingIntent => NetworkRequestInfo map. 2451 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2452 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2453 Intent intent = pendingIntent.getIntent(); 2454 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2455 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2456 if (existingPendingIntent != null && 2457 existingPendingIntent.getIntent().filterEquals(intent)) { 2458 return entry.getValue(); 2459 } 2460 } 2461 return null; 2462 } 2463 2464 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2465 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2466 2467 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2468 if (existingRequest != null) { // remove the existing request. 2469 if (DBG) log("Replacing " + existingRequest.request + " with " 2470 + nri.request + " because their intents matched."); 2471 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2472 } 2473 handleRegisterNetworkRequest(nri); 2474 } 2475 2476 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2477 mNetworkRequests.put(nri.request, nri); 2478 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2479 if (nri.request.isListen()) { 2480 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2481 if (nri.request.networkCapabilities.hasSignalStrength() && 2482 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2483 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2484 } 2485 } 2486 } 2487 rematchAllNetworksAndRequests(null, 0); 2488 if (nri.request.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2489 sendUpdatedScoreToFactories(nri.request, 0); 2490 } 2491 } 2492 2493 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2494 int callingUid) { 2495 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2496 if (nri != null) { 2497 handleReleaseNetworkRequest(nri.request, callingUid); 2498 } 2499 } 2500 2501 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2502 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2503 // would it have a chance of satisfying any NetworkRequests. 2504 private boolean unneeded(NetworkAgentInfo nai) { 2505 if (!nai.everConnected || nai.isVPN() || 2506 nai.isLingering() || nai.numRequestNetworkRequests() > 0) { 2507 return false; 2508 } 2509 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2510 // If this Network is already the highest scoring Network for a request, or if 2511 // there is hope for it to become one if it validated, then it is needed. 2512 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2513 (nai.isSatisfyingRequest(nri.request.requestId) || 2514 // Note that this catches two important cases: 2515 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2516 // is currently satisfying the request. This is desirable when 2517 // cellular ends up validating but WiFi does not. 2518 // 2. Unvalidated WiFi will not be reaped when validated cellular 2519 // is currently satisfying the request. This is desirable when 2520 // WiFi ends up validating and out scoring cellular. 2521 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2522 nai.getCurrentScoreAsValidated())) { 2523 return false; 2524 } 2525 } 2526 return true; 2527 } 2528 2529 private NetworkRequestInfo getNriForAppRequest( 2530 NetworkRequest request, int callingUid, String requestedOperation) { 2531 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2532 2533 if (nri != null) { 2534 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2535 log(String.format("UID %d attempted to %s for unowned request %s", 2536 callingUid, requestedOperation, nri)); 2537 return null; 2538 } 2539 } 2540 2541 return nri; 2542 } 2543 2544 private void handleRequestCallbackUpdate(NetworkRequest request, int callingUid, 2545 String description, int callbackType) { 2546 final NetworkRequestInfo nri = getNriForAppRequest(request, callingUid, description); 2547 if (nri == null) return; 2548 2549 final NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2550 // The network that is satisfying this request may have changed since 2551 // the application requested the update. 2552 // 2553 // - If the request is no longer satisfied, don't send any updates. 2554 // - If the request is satisfied by a different network, it is the 2555 // caller's responsibility to check that the Network object in the 2556 // callback matches the network that was returned in the last 2557 // onAvailable() callback for this request. 2558 if (nai == null) return; 2559 callCallbackForRequest(nri, nai, callbackType, 0); 2560 } 2561 2562 private void handleRequestLinkProperties(NetworkRequest request, int callingUid) { 2563 handleRequestCallbackUpdate(request, callingUid, 2564 "request LinkProperties", ConnectivityManager.CALLBACK_IP_CHANGED); 2565 } 2566 2567 private void handleRequestNetworkCapabilities(NetworkRequest request, int callingUid) { 2568 handleRequestCallbackUpdate(request, callingUid, 2569 "request NetworkCapabilities", ConnectivityManager.CALLBACK_CAP_CHANGED); 2570 } 2571 2572 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2573 final NetworkRequestInfo nri = getNriForAppRequest( 2574 request, callingUid, "release NetworkRequest"); 2575 if (nri == null) return; 2576 2577 if (VDBG || (DBG && nri.request.isRequest())) log("releasing " + request); 2578 nri.unlinkDeathRecipient(); 2579 mNetworkRequests.remove(request); 2580 synchronized (mUidToNetworkRequestCount) { 2581 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2582 if (requests < 1) { 2583 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2584 nri.mUid); 2585 } else if (requests == 1) { 2586 mUidToNetworkRequestCount.removeAt( 2587 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2588 } else { 2589 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2590 } 2591 } 2592 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2593 if (nri.request.isRequest()) { 2594 boolean wasKept = false; 2595 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2596 if (nai != null) { 2597 nai.removeRequest(nri.request.requestId); 2598 if (VDBG) { 2599 log(" Removing from current network " + nai.name() + 2600 ", leaving " + nai.numNetworkRequests() + " requests."); 2601 } 2602 // If there are still lingered requests on this network, don't tear it down, 2603 // but resume lingering instead. 2604 updateLingerState(nai, SystemClock.elapsedRealtime()); 2605 if (unneeded(nai)) { 2606 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2607 teardownUnneededNetwork(nai); 2608 } else { 2609 wasKept = true; 2610 } 2611 mNetworkForRequestId.remove(nri.request.requestId); 2612 } 2613 2614 // TODO: remove this code once we know that the Slog.wtf is never hit. 2615 // 2616 // Find all networks that are satisfying this request and remove the request 2617 // from their request lists. 2618 // TODO - it's my understanding that for a request there is only a single 2619 // network satisfying it, so this loop is wasteful 2620 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2621 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2622 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2623 otherNai.name() + ", but mNetworkAgentInfos says " + 2624 (nai != null ? nai.name() : "null")); 2625 } 2626 } 2627 2628 // Maintain the illusion. When this request arrived, we might have pretended 2629 // that a network connected to serve it, even though the network was already 2630 // connected. Now that this request has gone away, we might have to pretend 2631 // that the network disconnected. LegacyTypeTracker will generate that 2632 // phantom disconnect for this type. 2633 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2634 boolean doRemove = true; 2635 if (wasKept) { 2636 // check if any of the remaining requests for this network are for the 2637 // same legacy type - if so, don't remove the nai 2638 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2639 NetworkRequest otherRequest = nai.requestAt(i); 2640 if (otherRequest.legacyType == nri.request.legacyType && 2641 otherRequest.isRequest()) { 2642 if (DBG) log(" still have other legacy request - leaving"); 2643 doRemove = false; 2644 } 2645 } 2646 } 2647 2648 if (doRemove) { 2649 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2650 } 2651 } 2652 2653 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2654 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2655 nri.request); 2656 } 2657 } else { 2658 // listens don't have a singular affectedNetwork. Check all networks to see 2659 // if this listen request applies and remove it. 2660 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2661 nai.removeRequest(nri.request.requestId); 2662 if (nri.request.networkCapabilities.hasSignalStrength() && 2663 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2664 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2665 } 2666 } 2667 } 2668 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED, 0); 2669 } 2670 2671 @Override 2672 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2673 enforceConnectivityInternalPermission(); 2674 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2675 accept ? 1 : 0, always ? 1: 0, network)); 2676 } 2677 2678 @Override 2679 public void setAvoidUnvalidated(Network network) { 2680 enforceConnectivityInternalPermission(); 2681 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_AVOID_UNVALIDATED, network)); 2682 } 2683 2684 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2685 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2686 " accept=" + accept + " always=" + always); 2687 2688 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2689 if (nai == null) { 2690 // Nothing to do. 2691 return; 2692 } 2693 2694 if (nai.everValidated) { 2695 // The network validated while the dialog box was up. Take no action. 2696 return; 2697 } 2698 2699 if (!nai.networkMisc.explicitlySelected) { 2700 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2701 } 2702 2703 if (accept != nai.networkMisc.acceptUnvalidated) { 2704 int oldScore = nai.getCurrentScore(); 2705 nai.networkMisc.acceptUnvalidated = accept; 2706 rematchAllNetworksAndRequests(nai, oldScore); 2707 sendUpdatedScoreToFactories(nai); 2708 } 2709 2710 if (always) { 2711 nai.asyncChannel.sendMessage( 2712 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2713 } 2714 2715 if (!accept) { 2716 // Tell the NetworkAgent to not automatically reconnect to the network. 2717 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2718 // Teardown the nework. 2719 teardownUnneededNetwork(nai); 2720 } 2721 2722 } 2723 2724 private void handleSetAvoidUnvalidated(Network network) { 2725 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2726 if (nai == null || nai.lastValidated) { 2727 // Nothing to do. The network either disconnected or revalidated. 2728 return; 2729 } 2730 if (!nai.avoidUnvalidated) { 2731 int oldScore = nai.getCurrentScore(); 2732 nai.avoidUnvalidated = true; 2733 rematchAllNetworksAndRequests(nai, oldScore); 2734 sendUpdatedScoreToFactories(nai); 2735 } 2736 } 2737 2738 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2739 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2740 mHandler.sendMessageDelayed( 2741 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2742 PROMPT_UNVALIDATED_DELAY_MS); 2743 } 2744 2745 public boolean avoidBadWifi() { 2746 return mAvoidBadWifiTracker.currentValue(); 2747 } 2748 2749 private void rematchForAvoidBadWifiUpdate() { 2750 rematchAllNetworksAndRequests(null, 0); 2751 for (NetworkAgentInfo nai: mNetworkAgentInfos.values()) { 2752 if (nai.networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) { 2753 sendUpdatedScoreToFactories(nai); 2754 } 2755 } 2756 } 2757 2758 // TODO: Evaluate whether this is of interest to other consumers of 2759 // AvoidBadWifiTracker and worth moving out of here. 2760 private void dumpAvoidBadWifiSettings(IndentingPrintWriter pw) { 2761 final boolean configRestrict = mAvoidBadWifiTracker.configRestrictsAvoidBadWifi(); 2762 if (!configRestrict) { 2763 pw.println("Bad Wi-Fi avoidance: unrestricted"); 2764 return; 2765 } 2766 2767 pw.println("Bad Wi-Fi avoidance: " + avoidBadWifi()); 2768 pw.increaseIndent(); 2769 pw.println("Config restrict: " + configRestrict); 2770 2771 final String value = mAvoidBadWifiTracker.getSettingsValue(); 2772 String description; 2773 // Can't use a switch statement because strings are legal case labels, but null is not. 2774 if ("0".equals(value)) { 2775 description = "get stuck"; 2776 } else if (value == null) { 2777 description = "prompt"; 2778 } else if ("1".equals(value)) { 2779 description = "avoid"; 2780 } else { 2781 description = value + " (?)"; 2782 } 2783 pw.println("User setting: " + description); 2784 pw.println("Network overrides:"); 2785 pw.increaseIndent(); 2786 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2787 if (nai.avoidUnvalidated) { 2788 pw.println(nai.name()); 2789 } 2790 } 2791 pw.decreaseIndent(); 2792 pw.decreaseIndent(); 2793 } 2794 2795 private void showValidationNotification(NetworkAgentInfo nai, NotificationType type) { 2796 final String action; 2797 switch (type) { 2798 case NO_INTERNET: 2799 action = ConnectivityManager.ACTION_PROMPT_UNVALIDATED; 2800 break; 2801 case LOST_INTERNET: 2802 action = ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION; 2803 break; 2804 default: 2805 Slog.wtf(TAG, "Unknown notification type " + type); 2806 return; 2807 } 2808 2809 Intent intent = new Intent(action); 2810 intent.setData(Uri.fromParts("netId", Integer.toString(nai.network.netId), null)); 2811 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2812 intent.setClassName("com.android.settings", 2813 "com.android.settings.wifi.WifiNoInternetDialog"); 2814 2815 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2816 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2817 mNotifier.showNotification(nai.network.netId, type, nai, null, pendingIntent, true); 2818 } 2819 2820 private void handlePromptUnvalidated(Network network) { 2821 if (VDBG) log("handlePromptUnvalidated " + network); 2822 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2823 2824 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2825 // we haven't already been told to switch to it regardless of whether it validated or not. 2826 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2827 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2828 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2829 return; 2830 } 2831 showValidationNotification(nai, NotificationType.NO_INTERNET); 2832 } 2833 2834 private void handleNetworkUnvalidated(NetworkAgentInfo nai) { 2835 NetworkCapabilities nc = nai.networkCapabilities; 2836 if (DBG) log("handleNetworkUnvalidated " + nai.name() + " cap=" + nc); 2837 2838 if (nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) && 2839 mAvoidBadWifiTracker.shouldNotifyWifiUnvalidated()) { 2840 showValidationNotification(nai, NotificationType.LOST_INTERNET); 2841 } 2842 } 2843 2844 private class InternalHandler extends Handler { 2845 public InternalHandler(Looper looper) { 2846 super(looper); 2847 } 2848 2849 @Override 2850 public void handleMessage(Message msg) { 2851 switch (msg.what) { 2852 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2853 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2854 String causedBy = null; 2855 synchronized (ConnectivityService.this) { 2856 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2857 mNetTransitionWakeLock.isHeld()) { 2858 mNetTransitionWakeLock.release(); 2859 causedBy = mNetTransitionWakeLockCausedBy; 2860 } else { 2861 break; 2862 } 2863 } 2864 if (VDBG) { 2865 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2866 log("Failed to find a new network - expiring NetTransition Wakelock"); 2867 } else { 2868 log("NetTransition Wakelock (" + 2869 (causedBy == null ? "unknown" : causedBy) + 2870 " cleared because we found a replacement network"); 2871 } 2872 } 2873 break; 2874 } 2875 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2876 handleDeprecatedGlobalHttpProxy(); 2877 break; 2878 } 2879 case EVENT_PROXY_HAS_CHANGED: { 2880 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2881 break; 2882 } 2883 case EVENT_REGISTER_NETWORK_FACTORY: { 2884 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2885 break; 2886 } 2887 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2888 handleUnregisterNetworkFactory((Messenger)msg.obj); 2889 break; 2890 } 2891 case EVENT_REGISTER_NETWORK_AGENT: { 2892 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2893 break; 2894 } 2895 case EVENT_REGISTER_NETWORK_REQUEST: 2896 case EVENT_REGISTER_NETWORK_LISTENER: { 2897 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2898 break; 2899 } 2900 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2901 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2902 handleRegisterNetworkRequestWithIntent(msg); 2903 break; 2904 } 2905 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2906 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2907 break; 2908 } 2909 case EVENT_RELEASE_NETWORK_REQUEST: { 2910 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2911 break; 2912 } 2913 case EVENT_SET_ACCEPT_UNVALIDATED: { 2914 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2915 break; 2916 } 2917 case EVENT_SET_AVOID_UNVALIDATED: { 2918 handleSetAvoidUnvalidated((Network) msg.obj); 2919 break; 2920 } 2921 case EVENT_PROMPT_UNVALIDATED: { 2922 handlePromptUnvalidated((Network) msg.obj); 2923 break; 2924 } 2925 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2926 handleMobileDataAlwaysOn(); 2927 break; 2928 } 2929 case EVENT_REQUEST_LINKPROPERTIES: 2930 handleRequestLinkProperties((NetworkRequest) msg.obj, msg.arg1); 2931 break; 2932 case EVENT_REQUEST_NETCAPABILITIES: 2933 handleRequestNetworkCapabilities((NetworkRequest) msg.obj, msg.arg1); 2934 break; 2935 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2936 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2937 mKeepaliveTracker.handleStartKeepalive(msg); 2938 break; 2939 } 2940 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2941 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2942 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2943 int slot = msg.arg1; 2944 int reason = msg.arg2; 2945 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2946 break; 2947 } 2948 case EVENT_SYSTEM_READY: { 2949 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2950 nai.networkMonitor.systemReady = true; 2951 } 2952 break; 2953 } 2954 } 2955 } 2956 } 2957 2958 // javadoc from interface 2959 @Override 2960 public int tether(String iface) { 2961 ConnectivityManager.enforceTetherChangePermission(mContext); 2962 if (isTetheringSupported()) { 2963 final int status = mTethering.tether(iface); 2964 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2965 try { 2966 mPolicyManager.onTetheringChanged(iface, true); 2967 } catch (RemoteException e) { 2968 } 2969 } 2970 return status; 2971 } else { 2972 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2973 } 2974 } 2975 2976 // javadoc from interface 2977 @Override 2978 public int untether(String iface) { 2979 ConnectivityManager.enforceTetherChangePermission(mContext); 2980 2981 if (isTetheringSupported()) { 2982 final int status = mTethering.untether(iface); 2983 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2984 try { 2985 mPolicyManager.onTetheringChanged(iface, false); 2986 } catch (RemoteException e) { 2987 } 2988 } 2989 return status; 2990 } else { 2991 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2992 } 2993 } 2994 2995 // javadoc from interface 2996 @Override 2997 public int getLastTetherError(String iface) { 2998 enforceTetherAccessPermission(); 2999 3000 if (isTetheringSupported()) { 3001 return mTethering.getLastTetherError(iface); 3002 } else { 3003 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3004 } 3005 } 3006 3007 // TODO - proper iface API for selection by property, inspection, etc 3008 @Override 3009 public String[] getTetherableUsbRegexs() { 3010 enforceTetherAccessPermission(); 3011 if (isTetheringSupported()) { 3012 return mTethering.getTetherableUsbRegexs(); 3013 } else { 3014 return new String[0]; 3015 } 3016 } 3017 3018 @Override 3019 public String[] getTetherableWifiRegexs() { 3020 enforceTetherAccessPermission(); 3021 if (isTetheringSupported()) { 3022 return mTethering.getTetherableWifiRegexs(); 3023 } else { 3024 return new String[0]; 3025 } 3026 } 3027 3028 @Override 3029 public String[] getTetherableBluetoothRegexs() { 3030 enforceTetherAccessPermission(); 3031 if (isTetheringSupported()) { 3032 return mTethering.getTetherableBluetoothRegexs(); 3033 } else { 3034 return new String[0]; 3035 } 3036 } 3037 3038 @Override 3039 public int setUsbTethering(boolean enable) { 3040 ConnectivityManager.enforceTetherChangePermission(mContext); 3041 if (isTetheringSupported()) { 3042 return mTethering.setUsbTethering(enable); 3043 } else { 3044 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3045 } 3046 } 3047 3048 // TODO - move iface listing, queries, etc to new module 3049 // javadoc from interface 3050 @Override 3051 public String[] getTetherableIfaces() { 3052 enforceTetherAccessPermission(); 3053 return mTethering.getTetherableIfaces(); 3054 } 3055 3056 @Override 3057 public String[] getTetheredIfaces() { 3058 enforceTetherAccessPermission(); 3059 return mTethering.getTetheredIfaces(); 3060 } 3061 3062 @Override 3063 public String[] getTetheringErroredIfaces() { 3064 enforceTetherAccessPermission(); 3065 return mTethering.getErroredIfaces(); 3066 } 3067 3068 @Override 3069 public String[] getTetheredDhcpRanges() { 3070 enforceConnectivityInternalPermission(); 3071 return mTethering.getTetheredDhcpRanges(); 3072 } 3073 3074 // if ro.tether.denied = true we default to no tethering 3075 // gservices could set the secure setting to 1 though to enable it on a build where it 3076 // had previously been turned off. 3077 @Override 3078 public boolean isTetheringSupported() { 3079 enforceTetherAccessPermission(); 3080 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 3081 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 3082 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 3083 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 3084 return tetherEnabledInSettings && mUserManager.isAdminUser() && 3085 ((mTethering.getTetherableUsbRegexs().length != 0 || 3086 mTethering.getTetherableWifiRegexs().length != 0 || 3087 mTethering.getTetherableBluetoothRegexs().length != 0) && 3088 mTethering.getUpstreamIfaceTypes().length != 0); 3089 } 3090 3091 @Override 3092 public void startTethering(int type, ResultReceiver receiver, 3093 boolean showProvisioningUi) { 3094 ConnectivityManager.enforceTetherChangePermission(mContext); 3095 if (!isTetheringSupported()) { 3096 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 3097 return; 3098 } 3099 mTethering.startTethering(type, receiver, showProvisioningUi); 3100 } 3101 3102 @Override 3103 public void stopTethering(int type) { 3104 ConnectivityManager.enforceTetherChangePermission(mContext); 3105 mTethering.stopTethering(type); 3106 } 3107 3108 // Called when we lose the default network and have no replacement yet. 3109 // This will automatically be cleared after X seconds or a new default network 3110 // becomes CONNECTED, whichever happens first. The timer is started by the 3111 // first caller and not restarted by subsequent callers. 3112 private void requestNetworkTransitionWakelock(String forWhom) { 3113 int serialNum = 0; 3114 synchronized (this) { 3115 if (mNetTransitionWakeLock.isHeld()) return; 3116 serialNum = ++mNetTransitionWakeLockSerialNumber; 3117 mNetTransitionWakeLock.acquire(); 3118 mNetTransitionWakeLockCausedBy = forWhom; 3119 } 3120 mHandler.sendMessageDelayed(mHandler.obtainMessage( 3121 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 3122 mNetTransitionWakeLockTimeout); 3123 return; 3124 } 3125 3126 // 100 percent is full good, 0 is full bad. 3127 @Override 3128 public void reportInetCondition(int networkType, int percentage) { 3129 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 3130 if (nai == null) return; 3131 reportNetworkConnectivity(nai.network, percentage > 50); 3132 } 3133 3134 @Override 3135 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 3136 enforceAccessPermission(); 3137 enforceInternetPermission(); 3138 3139 NetworkAgentInfo nai; 3140 if (network == null) { 3141 nai = getDefaultNetwork(); 3142 } else { 3143 nai = getNetworkAgentInfoForNetwork(network); 3144 } 3145 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 3146 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 3147 return; 3148 } 3149 // Revalidate if the app report does not match our current validated state. 3150 if (hasConnectivity == nai.lastValidated) return; 3151 final int uid = Binder.getCallingUid(); 3152 if (DBG) { 3153 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 3154 ") by " + uid); 3155 } 3156 synchronized (nai) { 3157 // Validating a network that has not yet connected could result in a call to 3158 // rematchNetworkAndRequests() which is not meant to work on such networks. 3159 if (!nai.everConnected) return; 3160 3161 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 3162 3163 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 3164 } 3165 } 3166 3167 private ProxyInfo getDefaultProxy() { 3168 // this information is already available as a world read/writable jvm property 3169 // so this API change wouldn't have a benifit. It also breaks the passing 3170 // of proxy info to all the JVMs. 3171 // enforceAccessPermission(); 3172 synchronized (mProxyLock) { 3173 ProxyInfo ret = mGlobalProxy; 3174 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3175 return ret; 3176 } 3177 } 3178 3179 @Override 3180 public ProxyInfo getProxyForNetwork(Network network) { 3181 if (network == null) return getDefaultProxy(); 3182 final ProxyInfo globalProxy = getGlobalProxy(); 3183 if (globalProxy != null) return globalProxy; 3184 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3185 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3186 // caller may not have. 3187 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3188 if (nai == null) return null; 3189 synchronized (nai) { 3190 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3191 if (proxyInfo == null) return null; 3192 return new ProxyInfo(proxyInfo); 3193 } 3194 } 3195 3196 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3197 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3198 // proxy is null then there is no proxy in place). 3199 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3200 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3201 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3202 proxy = null; 3203 } 3204 return proxy; 3205 } 3206 3207 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3208 // better for determining if a new proxy broadcast is necessary: 3209 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3210 // avoid unnecessary broadcasts. 3211 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3212 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3213 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3214 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3215 // all set. 3216 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3217 a = canonicalizeProxyInfo(a); 3218 b = canonicalizeProxyInfo(b); 3219 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3220 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3221 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3222 } 3223 3224 public void setGlobalProxy(ProxyInfo proxyProperties) { 3225 enforceConnectivityInternalPermission(); 3226 3227 synchronized (mProxyLock) { 3228 if (proxyProperties == mGlobalProxy) return; 3229 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3230 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3231 3232 String host = ""; 3233 int port = 0; 3234 String exclList = ""; 3235 String pacFileUrl = ""; 3236 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3237 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3238 if (!proxyProperties.isValid()) { 3239 if (DBG) 3240 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3241 return; 3242 } 3243 mGlobalProxy = new ProxyInfo(proxyProperties); 3244 host = mGlobalProxy.getHost(); 3245 port = mGlobalProxy.getPort(); 3246 exclList = mGlobalProxy.getExclusionListAsString(); 3247 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3248 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3249 } 3250 } else { 3251 mGlobalProxy = null; 3252 } 3253 ContentResolver res = mContext.getContentResolver(); 3254 final long token = Binder.clearCallingIdentity(); 3255 try { 3256 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3257 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3258 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3259 exclList); 3260 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3261 } finally { 3262 Binder.restoreCallingIdentity(token); 3263 } 3264 3265 if (mGlobalProxy == null) { 3266 proxyProperties = mDefaultProxy; 3267 } 3268 sendProxyBroadcast(proxyProperties); 3269 } 3270 } 3271 3272 private void loadGlobalProxy() { 3273 ContentResolver res = mContext.getContentResolver(); 3274 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3275 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3276 String exclList = Settings.Global.getString(res, 3277 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3278 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3279 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3280 ProxyInfo proxyProperties; 3281 if (!TextUtils.isEmpty(pacFileUrl)) { 3282 proxyProperties = new ProxyInfo(pacFileUrl); 3283 } else { 3284 proxyProperties = new ProxyInfo(host, port, exclList); 3285 } 3286 if (!proxyProperties.isValid()) { 3287 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3288 return; 3289 } 3290 3291 synchronized (mProxyLock) { 3292 mGlobalProxy = proxyProperties; 3293 } 3294 } 3295 } 3296 3297 public ProxyInfo getGlobalProxy() { 3298 // this information is already available as a world read/writable jvm property 3299 // so this API change wouldn't have a benifit. It also breaks the passing 3300 // of proxy info to all the JVMs. 3301 // enforceAccessPermission(); 3302 synchronized (mProxyLock) { 3303 return mGlobalProxy; 3304 } 3305 } 3306 3307 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3308 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3309 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3310 proxy = null; 3311 } 3312 synchronized (mProxyLock) { 3313 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3314 if (mDefaultProxy == proxy) return; // catches repeated nulls 3315 if (proxy != null && !proxy.isValid()) { 3316 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3317 return; 3318 } 3319 3320 // This call could be coming from the PacManager, containing the port of the local 3321 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3322 // global (to get the correct local port), and send a broadcast. 3323 // TODO: Switch PacManager to have its own message to send back rather than 3324 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3325 if ((mGlobalProxy != null) && (proxy != null) 3326 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3327 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3328 mGlobalProxy = proxy; 3329 sendProxyBroadcast(mGlobalProxy); 3330 return; 3331 } 3332 mDefaultProxy = proxy; 3333 3334 if (mGlobalProxy != null) return; 3335 if (!mDefaultProxyDisabled) { 3336 sendProxyBroadcast(proxy); 3337 } 3338 } 3339 } 3340 3341 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3342 // This method gets called when any network changes proxy, but the broadcast only ever contains 3343 // the default proxy (even if it hasn't changed). 3344 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3345 // world where an app might be bound to a non-default network. 3346 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3347 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3348 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3349 3350 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3351 sendProxyBroadcast(getDefaultProxy()); 3352 } 3353 } 3354 3355 private void handleDeprecatedGlobalHttpProxy() { 3356 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3357 Settings.Global.HTTP_PROXY); 3358 if (!TextUtils.isEmpty(proxy)) { 3359 String data[] = proxy.split(":"); 3360 if (data.length == 0) { 3361 return; 3362 } 3363 3364 String proxyHost = data[0]; 3365 int proxyPort = 8080; 3366 if (data.length > 1) { 3367 try { 3368 proxyPort = Integer.parseInt(data[1]); 3369 } catch (NumberFormatException e) { 3370 return; 3371 } 3372 } 3373 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3374 setGlobalProxy(p); 3375 } 3376 } 3377 3378 private void sendProxyBroadcast(ProxyInfo proxy) { 3379 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3380 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3381 if (DBG) log("sending Proxy Broadcast for " + proxy); 3382 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3383 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3384 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3385 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3386 final long ident = Binder.clearCallingIdentity(); 3387 try { 3388 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3389 } finally { 3390 Binder.restoreCallingIdentity(ident); 3391 } 3392 } 3393 3394 private static class SettingsObserver extends ContentObserver { 3395 final private HashMap<Uri, Integer> mUriEventMap; 3396 final private Context mContext; 3397 final private Handler mHandler; 3398 3399 SettingsObserver(Context context, Handler handler) { 3400 super(null); 3401 mUriEventMap = new HashMap<Uri, Integer>(); 3402 mContext = context; 3403 mHandler = handler; 3404 } 3405 3406 void observe(Uri uri, int what) { 3407 mUriEventMap.put(uri, what); 3408 final ContentResolver resolver = mContext.getContentResolver(); 3409 resolver.registerContentObserver(uri, false, this); 3410 } 3411 3412 @Override 3413 public void onChange(boolean selfChange) { 3414 Slog.wtf(TAG, "Should never be reached."); 3415 } 3416 3417 @Override 3418 public void onChange(boolean selfChange, Uri uri) { 3419 final Integer what = mUriEventMap.get(uri); 3420 if (what != null) { 3421 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3422 } else { 3423 loge("No matching event to send for URI=" + uri); 3424 } 3425 } 3426 } 3427 3428 private static void log(String s) { 3429 Slog.d(TAG, s); 3430 } 3431 3432 private static void loge(String s) { 3433 Slog.e(TAG, s); 3434 } 3435 3436 private static <T> T checkNotNull(T value, String message) { 3437 if (value == null) { 3438 throw new NullPointerException(message); 3439 } 3440 return value; 3441 } 3442 3443 /** 3444 * Prepare for a VPN application. 3445 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3446 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3447 * 3448 * @param oldPackage Package name of the application which currently controls VPN, which will 3449 * be replaced. If there is no such application, this should should either be 3450 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3451 * @param newPackage Package name of the application which should gain control of VPN, or 3452 * {@code null} to disable. 3453 * @param userId User for whom to prepare the new VPN. 3454 * 3455 * @hide 3456 */ 3457 @Override 3458 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3459 int userId) { 3460 enforceCrossUserPermission(userId); 3461 throwIfLockdownEnabled(); 3462 3463 synchronized(mVpns) { 3464 Vpn vpn = mVpns.get(userId); 3465 if (vpn != null) { 3466 return vpn.prepare(oldPackage, newPackage); 3467 } else { 3468 return false; 3469 } 3470 } 3471 } 3472 3473 /** 3474 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3475 * This method is used by system-privileged apps. 3476 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3477 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3478 * 3479 * @param packageName The package for which authorization state should change. 3480 * @param userId User for whom {@code packageName} is installed. 3481 * @param authorized {@code true} if this app should be able to start a VPN connection without 3482 * explicit user approval, {@code false} if not. 3483 * 3484 * @hide 3485 */ 3486 @Override 3487 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3488 enforceCrossUserPermission(userId); 3489 3490 synchronized(mVpns) { 3491 Vpn vpn = mVpns.get(userId); 3492 if (vpn != null) { 3493 vpn.setPackageAuthorization(packageName, authorized); 3494 } 3495 } 3496 } 3497 3498 /** 3499 * Configure a TUN interface and return its file descriptor. Parameters 3500 * are encoded and opaque to this class. This method is used by VpnBuilder 3501 * and not available in ConnectivityManager. Permissions are checked in 3502 * Vpn class. 3503 * @hide 3504 */ 3505 @Override 3506 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3507 throwIfLockdownEnabled(); 3508 int user = UserHandle.getUserId(Binder.getCallingUid()); 3509 synchronized(mVpns) { 3510 return mVpns.get(user).establish(config); 3511 } 3512 } 3513 3514 /** 3515 * Start legacy VPN, controlling native daemons as needed. Creates a 3516 * secondary thread to perform connection work, returning quickly. 3517 */ 3518 @Override 3519 public void startLegacyVpn(VpnProfile profile) { 3520 throwIfLockdownEnabled(); 3521 final LinkProperties egress = getActiveLinkProperties(); 3522 if (egress == null) { 3523 throw new IllegalStateException("Missing active network connection"); 3524 } 3525 int user = UserHandle.getUserId(Binder.getCallingUid()); 3526 synchronized(mVpns) { 3527 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3528 } 3529 } 3530 3531 /** 3532 * Return the information of the ongoing legacy VPN. This method is used 3533 * by VpnSettings and not available in ConnectivityManager. Permissions 3534 * are checked in Vpn class. 3535 */ 3536 @Override 3537 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3538 enforceCrossUserPermission(userId); 3539 3540 synchronized(mVpns) { 3541 return mVpns.get(userId).getLegacyVpnInfo(); 3542 } 3543 } 3544 3545 /** 3546 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3547 * and not available in ConnectivityManager. 3548 */ 3549 @Override 3550 public VpnInfo[] getAllVpnInfo() { 3551 enforceConnectivityInternalPermission(); 3552 if (mLockdownEnabled) { 3553 return new VpnInfo[0]; 3554 } 3555 3556 synchronized(mVpns) { 3557 List<VpnInfo> infoList = new ArrayList<>(); 3558 for (int i = 0; i < mVpns.size(); i++) { 3559 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3560 if (info != null) { 3561 infoList.add(info); 3562 } 3563 } 3564 return infoList.toArray(new VpnInfo[infoList.size()]); 3565 } 3566 } 3567 3568 /** 3569 * @return VPN information for accounting, or null if we can't retrieve all required 3570 * information, e.g primary underlying iface. 3571 */ 3572 @Nullable 3573 private VpnInfo createVpnInfo(Vpn vpn) { 3574 VpnInfo info = vpn.getVpnInfo(); 3575 if (info == null) { 3576 return null; 3577 } 3578 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3579 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3580 // the underlyingNetworks list. 3581 if (underlyingNetworks == null) { 3582 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3583 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3584 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3585 } 3586 } else if (underlyingNetworks.length > 0) { 3587 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3588 if (linkProperties != null) { 3589 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3590 } 3591 } 3592 return info.primaryUnderlyingIface == null ? null : info; 3593 } 3594 3595 /** 3596 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3597 * VpnDialogs and not available in ConnectivityManager. 3598 * Permissions are checked in Vpn class. 3599 * @hide 3600 */ 3601 @Override 3602 public VpnConfig getVpnConfig(int userId) { 3603 enforceCrossUserPermission(userId); 3604 synchronized(mVpns) { 3605 Vpn vpn = mVpns.get(userId); 3606 if (vpn != null) { 3607 return vpn.getVpnConfig(); 3608 } else { 3609 return null; 3610 } 3611 } 3612 } 3613 3614 @Override 3615 public boolean updateLockdownVpn() { 3616 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3617 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3618 return false; 3619 } 3620 3621 // Tear down existing lockdown if profile was removed 3622 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3623 if (mLockdownEnabled) { 3624 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3625 final VpnProfile profile = VpnProfile.decode( 3626 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3627 if (profile == null) { 3628 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3629 setLockdownTracker(null); 3630 return true; 3631 } 3632 int user = UserHandle.getUserId(Binder.getCallingUid()); 3633 synchronized(mVpns) { 3634 Vpn vpn = mVpns.get(user); 3635 if (vpn == null) { 3636 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3637 return false; 3638 } 3639 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3640 } 3641 } else { 3642 setLockdownTracker(null); 3643 } 3644 3645 return true; 3646 } 3647 3648 /** 3649 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3650 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3651 */ 3652 private void setLockdownTracker(LockdownVpnTracker tracker) { 3653 // Shutdown any existing tracker 3654 final LockdownVpnTracker existing = mLockdownTracker; 3655 mLockdownTracker = null; 3656 if (existing != null) { 3657 existing.shutdown(); 3658 } 3659 3660 try { 3661 if (tracker != null) { 3662 mNetd.setFirewallEnabled(true); 3663 mNetd.setFirewallInterfaceRule("lo", true); 3664 mLockdownTracker = tracker; 3665 mLockdownTracker.init(); 3666 } else { 3667 mNetd.setFirewallEnabled(false); 3668 } 3669 } catch (RemoteException e) { 3670 // ignored; NMS lives inside system_server 3671 } 3672 } 3673 3674 private void throwIfLockdownEnabled() { 3675 if (mLockdownEnabled) { 3676 throw new IllegalStateException("Unavailable in lockdown mode"); 3677 } 3678 } 3679 3680 /** 3681 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3682 * some setup and then call {@code establish()} to connect. 3683 * 3684 * @return {@code true} if the service was started, the service was already connected, or there 3685 * was no always-on VPN to start. {@code false} otherwise. 3686 */ 3687 private boolean startAlwaysOnVpn(int userId) { 3688 synchronized (mVpns) { 3689 Vpn vpn = mVpns.get(userId); 3690 if (vpn == null) { 3691 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3692 // exists already. 3693 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3694 return false; 3695 } 3696 3697 return vpn.startAlwaysOnVpn(); 3698 } 3699 } 3700 3701 @Override 3702 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3703 enforceConnectivityInternalPermission(); 3704 enforceCrossUserPermission(userId); 3705 3706 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3707 if (LockdownVpnTracker.isEnabled()) { 3708 return false; 3709 } 3710 3711 synchronized (mVpns) { 3712 Vpn vpn = mVpns.get(userId); 3713 if (vpn == null) { 3714 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3715 return false; 3716 } 3717 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3718 return false; 3719 } 3720 if (!startAlwaysOnVpn(userId)) { 3721 vpn.setAlwaysOnPackage(null, false); 3722 return false; 3723 } 3724 3725 vpn.saveAlwaysOnPackage(); 3726 } 3727 return true; 3728 } 3729 3730 @Override 3731 public String getAlwaysOnVpnPackage(int userId) { 3732 enforceConnectivityInternalPermission(); 3733 enforceCrossUserPermission(userId); 3734 3735 synchronized (mVpns) { 3736 Vpn vpn = mVpns.get(userId); 3737 if (vpn == null) { 3738 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3739 return null; 3740 } 3741 return vpn.getAlwaysOnPackage(); 3742 } 3743 } 3744 3745 @Override 3746 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3747 // TODO: Remove? Any reason to trigger a provisioning check? 3748 return -1; 3749 } 3750 3751 /** Location to an updatable file listing carrier provisioning urls. 3752 * An example: 3753 * 3754 * <?xml version="1.0" encoding="utf-8"?> 3755 * <provisioningUrls> 3756 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3757 * </provisioningUrls> 3758 */ 3759 private static final String PROVISIONING_URL_PATH = 3760 "/data/misc/radio/provisioning_urls.xml"; 3761 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3762 3763 /** XML tag for root element. */ 3764 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3765 /** XML tag for individual url */ 3766 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3767 /** XML attribute for mcc */ 3768 private static final String ATTR_MCC = "mcc"; 3769 /** XML attribute for mnc */ 3770 private static final String ATTR_MNC = "mnc"; 3771 3772 private String getProvisioningUrlBaseFromFile() { 3773 FileReader fileReader = null; 3774 XmlPullParser parser = null; 3775 Configuration config = mContext.getResources().getConfiguration(); 3776 3777 try { 3778 fileReader = new FileReader(mProvisioningUrlFile); 3779 parser = Xml.newPullParser(); 3780 parser.setInput(fileReader); 3781 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3782 3783 while (true) { 3784 XmlUtils.nextElement(parser); 3785 3786 String element = parser.getName(); 3787 if (element == null) break; 3788 3789 if (element.equals(TAG_PROVISIONING_URL)) { 3790 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3791 try { 3792 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3793 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3794 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3795 parser.next(); 3796 if (parser.getEventType() == XmlPullParser.TEXT) { 3797 return parser.getText(); 3798 } 3799 } 3800 } 3801 } catch (NumberFormatException e) { 3802 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3803 } 3804 } 3805 } 3806 return null; 3807 } catch (FileNotFoundException e) { 3808 loge("Carrier Provisioning Urls file not found"); 3809 } catch (XmlPullParserException e) { 3810 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3811 } catch (IOException e) { 3812 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3813 } finally { 3814 if (fileReader != null) { 3815 try { 3816 fileReader.close(); 3817 } catch (IOException e) {} 3818 } 3819 } 3820 return null; 3821 } 3822 3823 @Override 3824 public String getMobileProvisioningUrl() { 3825 enforceConnectivityInternalPermission(); 3826 String url = getProvisioningUrlBaseFromFile(); 3827 if (TextUtils.isEmpty(url)) { 3828 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3829 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3830 } else { 3831 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3832 } 3833 // populate the iccid, imei and phone number in the provisioning url. 3834 if (!TextUtils.isEmpty(url)) { 3835 String phoneNumber = mTelephonyManager.getLine1Number(); 3836 if (TextUtils.isEmpty(phoneNumber)) { 3837 phoneNumber = "0000000000"; 3838 } 3839 url = String.format(url, 3840 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3841 mTelephonyManager.getDeviceId() /* IMEI */, 3842 phoneNumber /* Phone numer */); 3843 } 3844 3845 return url; 3846 } 3847 3848 @Override 3849 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3850 String action) { 3851 enforceConnectivityInternalPermission(); 3852 final long ident = Binder.clearCallingIdentity(); 3853 try { 3854 // Concatenate the range of types onto the range of NetIDs. 3855 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3856 mNotifier.setProvNotificationVisible(visible, id, action); 3857 } finally { 3858 Binder.restoreCallingIdentity(ident); 3859 } 3860 } 3861 3862 @Override 3863 public void setAirplaneMode(boolean enable) { 3864 enforceConnectivityInternalPermission(); 3865 final long ident = Binder.clearCallingIdentity(); 3866 try { 3867 final ContentResolver cr = mContext.getContentResolver(); 3868 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3869 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3870 intent.putExtra("state", enable); 3871 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3872 } finally { 3873 Binder.restoreCallingIdentity(ident); 3874 } 3875 } 3876 3877 private void onUserStart(int userId) { 3878 synchronized(mVpns) { 3879 Vpn userVpn = mVpns.get(userId); 3880 if (userVpn != null) { 3881 loge("Starting user already has a VPN"); 3882 return; 3883 } 3884 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3885 mVpns.put(userId, userVpn); 3886 3887 final ContentResolver cr = mContext.getContentResolver(); 3888 String alwaysOnPackage = Settings.Secure.getStringForUser(cr, 3889 Settings.Secure.ALWAYS_ON_VPN_APP, userId); 3890 final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, 3891 Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; 3892 if (alwaysOnPackage != null) { 3893 userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); 3894 } 3895 } 3896 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3897 updateLockdownVpn(); 3898 } 3899 } 3900 3901 private void onUserStop(int userId) { 3902 synchronized(mVpns) { 3903 Vpn userVpn = mVpns.get(userId); 3904 if (userVpn == null) { 3905 loge("Stopped user has no VPN"); 3906 return; 3907 } 3908 userVpn.onUserStopped(); 3909 mVpns.delete(userId); 3910 } 3911 } 3912 3913 private void onUserAdded(int userId) { 3914 synchronized(mVpns) { 3915 final int vpnsSize = mVpns.size(); 3916 for (int i = 0; i < vpnsSize; i++) { 3917 Vpn vpn = mVpns.valueAt(i); 3918 vpn.onUserAdded(userId); 3919 } 3920 } 3921 } 3922 3923 private void onUserRemoved(int userId) { 3924 synchronized(mVpns) { 3925 final int vpnsSize = mVpns.size(); 3926 for (int i = 0; i < vpnsSize; i++) { 3927 Vpn vpn = mVpns.valueAt(i); 3928 vpn.onUserRemoved(userId); 3929 } 3930 } 3931 } 3932 3933 private void onUserUnlocked(int userId) { 3934 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3935 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3936 updateLockdownVpn(); 3937 } else { 3938 startAlwaysOnVpn(userId); 3939 } 3940 } 3941 3942 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3943 @Override 3944 public void onReceive(Context context, Intent intent) { 3945 final String action = intent.getAction(); 3946 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3947 if (userId == UserHandle.USER_NULL) return; 3948 3949 if (Intent.ACTION_USER_STARTED.equals(action)) { 3950 onUserStart(userId); 3951 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3952 onUserStop(userId); 3953 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3954 onUserAdded(userId); 3955 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3956 onUserRemoved(userId); 3957 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3958 onUserUnlocked(userId); 3959 } 3960 } 3961 }; 3962 3963 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3964 new HashMap<Messenger, NetworkFactoryInfo>(); 3965 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3966 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3967 3968 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3969 // Map from UID to number of NetworkRequests that UID has filed. 3970 @GuardedBy("mUidToNetworkRequestCount") 3971 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3972 3973 private static class NetworkFactoryInfo { 3974 public final String name; 3975 public final Messenger messenger; 3976 public final AsyncChannel asyncChannel; 3977 3978 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3979 this.name = name; 3980 this.messenger = messenger; 3981 this.asyncChannel = asyncChannel; 3982 } 3983 } 3984 3985 private void ensureNetworkRequestHasType(NetworkRequest request) { 3986 if (request.type == NetworkRequest.Type.NONE) { 3987 throw new IllegalArgumentException( 3988 "All NetworkRequests in ConnectivityService must have a type"); 3989 } 3990 } 3991 3992 /** 3993 * Tracks info about the requester. 3994 * Also used to notice when the calling process dies so we can self-expire 3995 */ 3996 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3997 final NetworkRequest request; 3998 final PendingIntent mPendingIntent; 3999 boolean mPendingIntentSent; 4000 private final IBinder mBinder; 4001 final int mPid; 4002 final int mUid; 4003 final Messenger messenger; 4004 4005 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 4006 request = r; 4007 ensureNetworkRequestHasType(request); 4008 mPendingIntent = pi; 4009 messenger = null; 4010 mBinder = null; 4011 mPid = getCallingPid(); 4012 mUid = getCallingUid(); 4013 enforceRequestCountLimit(); 4014 } 4015 4016 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 4017 super(); 4018 messenger = m; 4019 request = r; 4020 ensureNetworkRequestHasType(request); 4021 mBinder = binder; 4022 mPid = getCallingPid(); 4023 mUid = getCallingUid(); 4024 mPendingIntent = null; 4025 enforceRequestCountLimit(); 4026 4027 try { 4028 mBinder.linkToDeath(this, 0); 4029 } catch (RemoteException e) { 4030 binderDied(); 4031 } 4032 } 4033 4034 private void enforceRequestCountLimit() { 4035 synchronized (mUidToNetworkRequestCount) { 4036 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 4037 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 4038 throw new IllegalArgumentException("Too many NetworkRequests filed"); 4039 } 4040 mUidToNetworkRequestCount.put(mUid, networkRequests); 4041 } 4042 } 4043 4044 void unlinkDeathRecipient() { 4045 if (mBinder != null) { 4046 mBinder.unlinkToDeath(this, 0); 4047 } 4048 } 4049 4050 public void binderDied() { 4051 log("ConnectivityService NetworkRequestInfo binderDied(" + 4052 request + ", " + mBinder + ")"); 4053 releaseNetworkRequest(request); 4054 } 4055 4056 public String toString() { 4057 return "uid/pid:" + mUid + "/" + mPid + " " + request + 4058 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 4059 } 4060 } 4061 4062 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 4063 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 4064 if (badCapability != null) { 4065 throw new IllegalArgumentException("Cannot request network with " + badCapability); 4066 } 4067 } 4068 4069 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 4070 final SortedSet<Integer> thresholds = new TreeSet(); 4071 synchronized (nai) { 4072 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4073 if (nri.request.networkCapabilities.hasSignalStrength() && 4074 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 4075 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 4076 } 4077 } 4078 } 4079 return new ArrayList<Integer>(thresholds); 4080 } 4081 4082 private void updateSignalStrengthThresholds( 4083 NetworkAgentInfo nai, String reason, NetworkRequest request) { 4084 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 4085 Bundle thresholds = new Bundle(); 4086 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 4087 4088 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 4089 String detail; 4090 if (request != null && request.networkCapabilities.hasSignalStrength()) { 4091 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 4092 } else { 4093 detail = reason; 4094 } 4095 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 4096 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 4097 } 4098 4099 nai.asyncChannel.sendMessage( 4100 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 4101 0, 0, thresholds); 4102 } 4103 4104 @Override 4105 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 4106 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 4107 final NetworkRequest.Type type = (networkCapabilities == null) 4108 ? NetworkRequest.Type.TRACK_DEFAULT 4109 : NetworkRequest.Type.REQUEST; 4110 // If the requested networkCapabilities is null, take them instead from 4111 // the default network request. This allows callers to keep track of 4112 // the system default network. 4113 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 4114 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 4115 enforceAccessPermission(); 4116 } else { 4117 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4118 enforceNetworkRequestPermissions(networkCapabilities); 4119 // TODO: this is incorrect. We mark the request as metered or not depending on the state 4120 // of the app when the request is filed, but we never change the request if the app 4121 // changes network state. http://b/29964605 4122 enforceMeteredApnPolicy(networkCapabilities); 4123 } 4124 ensureRequestableCapabilities(networkCapabilities); 4125 4126 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 4127 throw new IllegalArgumentException("Bad timeout specified"); 4128 } 4129 4130 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 4131 .equals(networkCapabilities.getNetworkSpecifier())) { 4132 throw new IllegalArgumentException("Invalid network specifier - must not be '" 4133 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 4134 } 4135 4136 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4137 nextNetworkRequestId(), type); 4138 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4139 if (DBG) log("requestNetwork for " + nri); 4140 4141 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4142 if (timeoutMs > 0) { 4143 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4144 nri), timeoutMs); 4145 } 4146 return networkRequest; 4147 } 4148 4149 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4150 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4151 enforceConnectivityRestrictedNetworksPermission(); 4152 } else { 4153 enforceChangePermission(); 4154 } 4155 } 4156 4157 @Override 4158 public boolean requestBandwidthUpdate(Network network) { 4159 enforceAccessPermission(); 4160 NetworkAgentInfo nai = null; 4161 if (network == null) { 4162 return false; 4163 } 4164 synchronized (mNetworkForNetId) { 4165 nai = mNetworkForNetId.get(network.netId); 4166 } 4167 if (nai != null) { 4168 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4169 return true; 4170 } 4171 return false; 4172 } 4173 4174 private boolean isSystem(int uid) { 4175 return uid < Process.FIRST_APPLICATION_UID; 4176 } 4177 4178 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4179 final int uid = Binder.getCallingUid(); 4180 if (isSystem(uid)) { 4181 return; 4182 } 4183 // if UID is restricted, don't allow them to bring up metered APNs 4184 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 4185 final int uidRules; 4186 synchronized(mRulesLock) { 4187 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 4188 } 4189 if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 4190 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { 4191 // we could silently fail or we can filter the available nets to only give 4192 // them those they have access to. Chose the more useful option. 4193 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4194 } 4195 } 4196 } 4197 4198 @Override 4199 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4200 PendingIntent operation) { 4201 checkNotNull(operation, "PendingIntent cannot be null."); 4202 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4203 enforceNetworkRequestPermissions(networkCapabilities); 4204 enforceMeteredApnPolicy(networkCapabilities); 4205 ensureRequestableCapabilities(networkCapabilities); 4206 4207 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4208 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4209 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4210 if (DBG) log("pendingRequest for " + nri); 4211 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4212 nri)); 4213 return networkRequest; 4214 } 4215 4216 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4217 mHandler.sendMessageDelayed( 4218 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4219 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4220 } 4221 4222 @Override 4223 public void releasePendingNetworkRequest(PendingIntent operation) { 4224 checkNotNull(operation, "PendingIntent cannot be null."); 4225 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4226 getCallingUid(), 0, operation)); 4227 } 4228 4229 // In order to implement the compatibility measure for pre-M apps that call 4230 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4231 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4232 // This ensures it has permission to do so. 4233 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4234 if (nc == null) { 4235 return false; 4236 } 4237 int[] transportTypes = nc.getTransportTypes(); 4238 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4239 return false; 4240 } 4241 try { 4242 mContext.enforceCallingOrSelfPermission( 4243 android.Manifest.permission.ACCESS_WIFI_STATE, 4244 "ConnectivityService"); 4245 } catch (SecurityException e) { 4246 return false; 4247 } 4248 return true; 4249 } 4250 4251 @Override 4252 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4253 Messenger messenger, IBinder binder) { 4254 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4255 enforceAccessPermission(); 4256 } 4257 4258 NetworkRequest networkRequest = new NetworkRequest( 4259 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4260 NetworkRequest.Type.LISTEN); 4261 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4262 if (VDBG) log("listenForNetwork for " + nri); 4263 4264 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4265 return networkRequest; 4266 } 4267 4268 @Override 4269 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4270 PendingIntent operation) { 4271 checkNotNull(operation, "PendingIntent cannot be null."); 4272 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4273 enforceAccessPermission(); 4274 } 4275 4276 NetworkRequest networkRequest = new NetworkRequest( 4277 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4278 NetworkRequest.Type.LISTEN); 4279 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4280 if (VDBG) log("pendingListenForNetwork for " + nri); 4281 4282 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4283 } 4284 4285 @Override 4286 public void requestLinkProperties(NetworkRequest networkRequest) { 4287 ensureNetworkRequestHasType(networkRequest); 4288 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4289 mHandler.sendMessage(mHandler.obtainMessage( 4290 EVENT_REQUEST_LINKPROPERTIES, getCallingUid(), 0, networkRequest)); 4291 } 4292 4293 @Override 4294 public void requestNetworkCapabilities(NetworkRequest networkRequest) { 4295 ensureNetworkRequestHasType(networkRequest); 4296 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4297 mHandler.sendMessage(mHandler.obtainMessage( 4298 EVENT_REQUEST_NETCAPABILITIES, getCallingUid(), 0, networkRequest)); 4299 } 4300 4301 @Override 4302 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4303 ensureNetworkRequestHasType(networkRequest); 4304 mHandler.sendMessage(mHandler.obtainMessage( 4305 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4306 } 4307 4308 @Override 4309 public void registerNetworkFactory(Messenger messenger, String name) { 4310 enforceConnectivityInternalPermission(); 4311 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4312 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4313 } 4314 4315 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4316 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4317 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4318 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4319 } 4320 4321 @Override 4322 public void unregisterNetworkFactory(Messenger messenger) { 4323 enforceConnectivityInternalPermission(); 4324 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4325 } 4326 4327 private void handleUnregisterNetworkFactory(Messenger messenger) { 4328 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4329 if (nfi == null) { 4330 loge("Failed to find Messenger in unregisterNetworkFactory"); 4331 return; 4332 } 4333 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4334 } 4335 4336 /** 4337 * NetworkAgentInfo supporting a request by requestId. 4338 * These have already been vetted (their Capabilities satisfy the request) 4339 * and the are the highest scored network available. 4340 * the are keyed off the Requests requestId. 4341 */ 4342 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4343 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4344 new SparseArray<NetworkAgentInfo>(); 4345 4346 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4347 @GuardedBy("mNetworkForNetId") 4348 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4349 new SparseArray<NetworkAgentInfo>(); 4350 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4351 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4352 // there may not be a strict 1:1 correlation between the two. 4353 @GuardedBy("mNetworkForNetId") 4354 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4355 4356 // NetworkAgentInfo keyed off its connecting messenger 4357 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4358 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4359 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4360 new HashMap<Messenger, NetworkAgentInfo>(); 4361 4362 @GuardedBy("mBlockedAppUids") 4363 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4364 4365 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4366 private final NetworkRequest mDefaultRequest; 4367 4368 // Request used to optionally keep mobile data active even when higher 4369 // priority networks like Wi-Fi are active. 4370 private final NetworkRequest mDefaultMobileDataRequest; 4371 4372 private NetworkAgentInfo getDefaultNetwork() { 4373 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4374 } 4375 4376 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4377 return nai == getDefaultNetwork(); 4378 } 4379 4380 private boolean isDefaultRequest(NetworkRequestInfo nri) { 4381 return nri.request.requestId == mDefaultRequest.requestId; 4382 } 4383 4384 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4385 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4386 int currentScore, NetworkMisc networkMisc) { 4387 enforceConnectivityInternalPermission(); 4388 4389 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4390 // satisfies mDefaultRequest. 4391 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4392 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4393 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4394 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4395 synchronized (this) { 4396 nai.networkMonitor.systemReady = mSystemReady; 4397 } 4398 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, 4399 networkInfo.getExtraInfo()); 4400 if (DBG) log("registerNetworkAgent " + nai); 4401 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4402 return nai.network.netId; 4403 } 4404 4405 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4406 if (VDBG) log("Got NetworkAgent Messenger"); 4407 mNetworkAgentInfos.put(na.messenger, na); 4408 synchronized (mNetworkForNetId) { 4409 mNetworkForNetId.put(na.network.netId, na); 4410 } 4411 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4412 NetworkInfo networkInfo = na.networkInfo; 4413 na.networkInfo = null; 4414 updateNetworkInfo(na, networkInfo); 4415 } 4416 4417 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4418 LinkProperties newLp = networkAgent.linkProperties; 4419 int netId = networkAgent.network.netId; 4420 4421 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4422 // we do anything else, make sure its LinkProperties are accurate. 4423 if (networkAgent.clatd != null) { 4424 networkAgent.clatd.fixupLinkProperties(oldLp); 4425 } 4426 4427 updateInterfaces(newLp, oldLp, netId); 4428 updateMtu(newLp, oldLp); 4429 // TODO - figure out what to do for clat 4430// for (LinkProperties lp : newLp.getStackedLinks()) { 4431// updateMtu(lp, null); 4432// } 4433 updateTcpBufferSizes(networkAgent); 4434 4435 updateRoutes(newLp, oldLp, netId); 4436 updateDnses(newLp, oldLp, netId); 4437 4438 updateClat(newLp, oldLp, networkAgent); 4439 if (isDefaultNetwork(networkAgent)) { 4440 handleApplyDefaultProxy(newLp.getHttpProxy()); 4441 } else { 4442 updateProxy(newLp, oldLp, networkAgent); 4443 } 4444 // TODO - move this check to cover the whole function 4445 if (!Objects.equals(newLp, oldLp)) { 4446 notifyIfacesChangedForNetworkStats(); 4447 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4448 } 4449 4450 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4451 } 4452 4453 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4454 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4455 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4456 4457 if (!wasRunningClat && shouldRunClat) { 4458 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4459 nai.clatd.start(); 4460 } else if (wasRunningClat && !shouldRunClat) { 4461 nai.clatd.stop(); 4462 } 4463 } 4464 4465 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4466 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4467 if (oldLp != null) { 4468 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4469 } else if (newLp != null) { 4470 interfaceDiff.added = newLp.getAllInterfaceNames(); 4471 } 4472 for (String iface : interfaceDiff.added) { 4473 try { 4474 if (DBG) log("Adding iface " + iface + " to network " + netId); 4475 mNetd.addInterfaceToNetwork(iface, netId); 4476 } catch (Exception e) { 4477 loge("Exception adding interface: " + e); 4478 } 4479 } 4480 for (String iface : interfaceDiff.removed) { 4481 try { 4482 if (DBG) log("Removing iface " + iface + " from network " + netId); 4483 mNetd.removeInterfaceFromNetwork(iface, netId); 4484 } catch (Exception e) { 4485 loge("Exception removing interface: " + e); 4486 } 4487 } 4488 } 4489 4490 /** 4491 * Have netd update routes from oldLp to newLp. 4492 * @return true if routes changed between oldLp and newLp 4493 */ 4494 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4495 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4496 if (oldLp != null) { 4497 routeDiff = oldLp.compareAllRoutes(newLp); 4498 } else if (newLp != null) { 4499 routeDiff.added = newLp.getAllRoutes(); 4500 } 4501 4502 // add routes before removing old in case it helps with continuous connectivity 4503 4504 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4505 for (RouteInfo route : routeDiff.added) { 4506 if (route.hasGateway()) continue; 4507 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4508 try { 4509 mNetd.addRoute(netId, route); 4510 } catch (Exception e) { 4511 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4512 loge("Exception in addRoute for non-gateway: " + e); 4513 } 4514 } 4515 } 4516 for (RouteInfo route : routeDiff.added) { 4517 if (route.hasGateway() == false) continue; 4518 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4519 try { 4520 mNetd.addRoute(netId, route); 4521 } catch (Exception e) { 4522 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4523 loge("Exception in addRoute for gateway: " + e); 4524 } 4525 } 4526 } 4527 4528 for (RouteInfo route : routeDiff.removed) { 4529 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4530 try { 4531 mNetd.removeRoute(netId, route); 4532 } catch (Exception e) { 4533 loge("Exception in removeRoute: " + e); 4534 } 4535 } 4536 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4537 } 4538 4539 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4540 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4541 return; // no updating necessary 4542 } 4543 4544 Collection<InetAddress> dnses = newLp.getDnsServers(); 4545 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4546 try { 4547 mNetd.setDnsConfigurationForNetwork( 4548 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4549 } catch (Exception e) { 4550 loge("Exception in setDnsConfigurationForNetwork: " + e); 4551 } 4552 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4553 if (defaultNai != null && defaultNai.network.netId == netId) { 4554 setDefaultDnsSystemProperties(dnses); 4555 } 4556 flushVmDnsCache(); 4557 } 4558 4559 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4560 int last = 0; 4561 for (InetAddress dns : dnses) { 4562 ++last; 4563 String key = "net.dns" + last; 4564 String value = dns.getHostAddress(); 4565 SystemProperties.set(key, value); 4566 } 4567 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4568 String key = "net.dns" + i; 4569 SystemProperties.set(key, ""); 4570 } 4571 mNumDnsEntries = last; 4572 } 4573 4574 /** 4575 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4576 * augmented with any stateful capabilities implied from {@code networkAgent} 4577 * (e.g., validated status and captive portal status). 4578 * 4579 * @param oldScore score of the network before any of the changes that prompted us 4580 * to call this function. 4581 * @param nai the network having its capabilities updated. 4582 * @param networkCapabilities the new network capabilities. 4583 */ 4584 private void updateCapabilities( 4585 int oldScore, NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4586 // Don't modify caller's NetworkCapabilities. 4587 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4588 if (nai.lastValidated) { 4589 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4590 } else { 4591 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4592 } 4593 if (nai.lastCaptivePortalDetected) { 4594 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4595 } else { 4596 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4597 } 4598 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4599 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4600 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4601 try { 4602 mNetd.setNetworkPermission(nai.network.netId, 4603 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4604 null : NetworkManagementService.PERMISSION_SYSTEM); 4605 } catch (RemoteException e) { 4606 loge("Exception in setNetworkPermission: " + e); 4607 } 4608 } 4609 synchronized (nai) { 4610 nai.networkCapabilities = networkCapabilities; 4611 } 4612 rematchAllNetworksAndRequests(nai, oldScore); 4613 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4614 } 4615 } 4616 4617 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4618 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4619 NetworkRequest nr = nai.requestAt(i); 4620 // Don't send listening requests to factories. b/17393458 4621 if (nr.isListen()) continue; 4622 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4623 } 4624 } 4625 4626 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4627 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4628 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4629 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4630 networkRequest); 4631 } 4632 } 4633 4634 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4635 int notificationType) { 4636 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4637 Intent intent = new Intent(); 4638 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4639 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4640 nri.mPendingIntentSent = true; 4641 sendIntent(nri.mPendingIntent, intent); 4642 } 4643 // else not handled 4644 } 4645 4646 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4647 mPendingIntentWakeLock.acquire(); 4648 try { 4649 if (DBG) log("Sending " + pendingIntent); 4650 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4651 } catch (PendingIntent.CanceledException e) { 4652 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4653 mPendingIntentWakeLock.release(); 4654 releasePendingNetworkRequest(pendingIntent); 4655 } 4656 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4657 } 4658 4659 @Override 4660 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4661 String resultData, Bundle resultExtras) { 4662 if (DBG) log("Finished sending " + pendingIntent); 4663 mPendingIntentWakeLock.release(); 4664 // Release with a delay so the receiving client has an opportunity to put in its 4665 // own request. 4666 releasePendingNetworkRequestWithDelay(pendingIntent); 4667 } 4668 4669 private void callCallbackForRequest(NetworkRequestInfo nri, 4670 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 4671 if (nri.messenger == null) return; // Default request has no msgr 4672 Bundle bundle = new Bundle(); 4673 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4674 new NetworkRequest(nri.request)); 4675 Message msg = Message.obtain(); 4676 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4677 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4678 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4679 } 4680 switch (notificationType) { 4681 case ConnectivityManager.CALLBACK_LOSING: { 4682 msg.arg1 = arg1; 4683 break; 4684 } 4685 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4686 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4687 new NetworkCapabilities(networkAgent.networkCapabilities)); 4688 break; 4689 } 4690 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4691 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4692 new LinkProperties(networkAgent.linkProperties)); 4693 break; 4694 } 4695 } 4696 msg.what = notificationType; 4697 msg.setData(bundle); 4698 try { 4699 if (VDBG) { 4700 log("sending notification " + notifyTypeToName(notificationType) + 4701 " for " + nri.request); 4702 } 4703 nri.messenger.send(msg); 4704 } catch (RemoteException e) { 4705 // may occur naturally in the race of binder death. 4706 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4707 } 4708 } 4709 4710 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4711 if (nai.numRequestNetworkRequests() != 0) { 4712 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4713 NetworkRequest nr = nai.requestAt(i); 4714 // Ignore listening requests. 4715 if (nr.isListen()) continue; 4716 loge("Dead network still had at least " + nr); 4717 break; 4718 } 4719 } 4720 nai.asyncChannel.disconnect(); 4721 } 4722 4723 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4724 if (oldNetwork == null) { 4725 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4726 return; 4727 } 4728 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4729 4730 // If we get here it means that the last linger timeout for this network expired. So there 4731 // must be no other active linger timers, and we must stop lingering. 4732 oldNetwork.clearLingerState(); 4733 4734 if (unneeded(oldNetwork)) { 4735 teardownUnneededNetwork(oldNetwork); 4736 } 4737 } 4738 4739 private void makeDefault(NetworkAgentInfo newNetwork) { 4740 if (DBG) log("Switching to new default network: " + newNetwork); 4741 setupDataActivityTracking(newNetwork); 4742 try { 4743 mNetd.setDefaultNetId(newNetwork.network.netId); 4744 } catch (Exception e) { 4745 loge("Exception setting default network :" + e); 4746 } 4747 notifyLockdownVpn(newNetwork); 4748 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4749 updateTcpBufferSizes(newNetwork); 4750 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4751 } 4752 4753 // Handles a network appearing or improving its score. 4754 // 4755 // - Evaluates all current NetworkRequests that can be 4756 // satisfied by newNetwork, and reassigns to newNetwork 4757 // any such requests for which newNetwork is the best. 4758 // 4759 // - Lingers any validated Networks that as a result are no longer 4760 // needed. A network is needed if it is the best network for 4761 // one or more NetworkRequests, or if it is a VPN. 4762 // 4763 // - Tears down newNetwork if it just became validated 4764 // but turns out to be unneeded. 4765 // 4766 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4767 // networks that have no chance (i.e. even if validated) 4768 // of becoming the highest scoring network. 4769 // 4770 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4771 // it does not remove NetworkRequests that other Networks could better satisfy. 4772 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4773 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4774 // as it performs better by a factor of the number of Networks. 4775 // 4776 // @param newNetwork is the network to be matched against NetworkRequests. 4777 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4778 // performed to tear down unvalidated networks that have no chance (i.e. even if 4779 // validated) of becoming the highest scoring network. 4780 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4781 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 4782 if (!newNetwork.everConnected) return; 4783 boolean keep = newNetwork.isVPN(); 4784 boolean isNewDefault = false; 4785 NetworkAgentInfo oldDefaultNetwork = null; 4786 if (VDBG) log("rematching " + newNetwork.name()); 4787 // Find and migrate to this Network any NetworkRequests for 4788 // which this network is now the best. 4789 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4790 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4791 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4792 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4793 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4794 final boolean satisfies = newNetwork.satisfies(nri.request); 4795 if (newNetwork == currentNetwork && satisfies) { 4796 if (VDBG) { 4797 log("Network " + newNetwork.name() + " was already satisfying" + 4798 " request " + nri.request.requestId + ". No change."); 4799 } 4800 keep = true; 4801 continue; 4802 } 4803 4804 // check if it satisfies the NetworkCapabilities 4805 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4806 if (satisfies) { 4807 if (nri.request.isListen()) { 4808 // This is not a request, it's a callback listener. 4809 // Add it to newNetwork regardless of score. 4810 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4811 continue; 4812 } 4813 4814 // next check if it's better than any current network we're using for 4815 // this request 4816 if (VDBG) { 4817 log("currentScore = " + 4818 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4819 ", newScore = " + newNetwork.getCurrentScore()); 4820 } 4821 if (currentNetwork == null || 4822 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4823 if (VDBG) log("rematch for " + newNetwork.name()); 4824 if (currentNetwork != null) { 4825 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4826 currentNetwork.removeRequest(nri.request.requestId); 4827 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 4828 affectedNetworks.add(currentNetwork); 4829 } else { 4830 if (VDBG) log(" accepting network in place of null"); 4831 } 4832 newNetwork.unlingerRequest(nri.request); 4833 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4834 if (!newNetwork.addRequest(nri.request)) { 4835 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4836 } 4837 addedRequests.add(nri); 4838 keep = true; 4839 // Tell NetworkFactories about the new score, so they can stop 4840 // trying to connect if they know they cannot match it. 4841 // TODO - this could get expensive if we have alot of requests for this 4842 // network. Think about if there is a way to reduce this. Push 4843 // netid->request mapping to each factory? 4844 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4845 if (isDefaultRequest(nri)) { 4846 isNewDefault = true; 4847 oldDefaultNetwork = currentNetwork; 4848 if (currentNetwork != null) { 4849 mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork); 4850 } 4851 } 4852 } 4853 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 4854 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4855 // mark it as no longer satisfying "nri". Because networks are processed by 4856 // rematchAllNetworksAndRequests() in descending score order, "currentNetwork" will 4857 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4858 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4859 // This means this code doesn't have to handle the case where "currentNetwork" no 4860 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4861 if (DBG) { 4862 log("Network " + newNetwork.name() + " stopped satisfying" + 4863 " request " + nri.request.requestId); 4864 } 4865 newNetwork.removeRequest(nri.request.requestId); 4866 if (currentNetwork == newNetwork) { 4867 mNetworkForRequestId.remove(nri.request.requestId); 4868 sendUpdatedScoreToFactories(nri.request, 0); 4869 } else { 4870 if (nri.request.isRequest()) { 4871 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4872 newNetwork.name() + 4873 " without updating mNetworkForRequestId or factories!"); 4874 } 4875 } 4876 // TODO: technically, sending CALLBACK_LOST here is 4877 // incorrect if nri is a request (not a listen) and there 4878 // is a replacement network currently connected that can 4879 // satisfy it. However, the only capability that can both 4880 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4881 // so this code is only incorrect for a network that loses 4882 // the TRUSTED capability, which is a rare case. 4883 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 4884 } 4885 } 4886 if (isNewDefault) { 4887 // Notify system services that this network is up. 4888 makeDefault(newNetwork); 4889 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 4890 logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); 4891 synchronized (ConnectivityService.this) { 4892 // have a new default network, release the transition wakelock in 4893 // a second if it's held. The second pause is to allow apps 4894 // to reconnect over the new network 4895 if (mNetTransitionWakeLock.isHeld()) { 4896 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4897 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4898 mNetTransitionWakeLockSerialNumber, 0), 4899 1000); 4900 } 4901 } 4902 } 4903 4904 // do this after the default net is switched, but 4905 // before LegacyTypeTracker sends legacy broadcasts 4906 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4907 4908 // Linger any networks that are no longer needed. This should be done after sending the 4909 // available callback for newNetwork. 4910 for (NetworkAgentInfo nai : affectedNetworks) { 4911 updateLingerState(nai, now); 4912 } 4913 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 4914 // does not need to be done in any particular order. 4915 updateLingerState(newNetwork, now); 4916 4917 if (isNewDefault) { 4918 // Maintain the illusion: since the legacy API only 4919 // understands one network at a time, we must pretend 4920 // that the current default network disconnected before 4921 // the new one connected. 4922 if (oldDefaultNetwork != null) { 4923 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4924 oldDefaultNetwork, true); 4925 } 4926 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4927 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4928 notifyLockdownVpn(newNetwork); 4929 } 4930 4931 if (keep) { 4932 // Notify battery stats service about this network, both the normal 4933 // interface and any stacked links. 4934 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4935 try { 4936 final IBatteryStats bs = BatteryStatsService.getService(); 4937 final int type = newNetwork.networkInfo.getType(); 4938 4939 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4940 bs.noteNetworkInterfaceType(baseIface, type); 4941 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4942 final String stackedIface = stacked.getInterfaceName(); 4943 bs.noteNetworkInterfaceType(stackedIface, type); 4944 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4945 } 4946 } catch (RemoteException ignored) { 4947 } 4948 4949 // This has to happen after the notifyNetworkCallbacks as that tickles each 4950 // ConnectivityManager instance so that legacy requests correctly bind dns 4951 // requests to this network. The legacy users are listening for this bcast 4952 // and will generally do a dns request so they can ensureRouteToHost and if 4953 // they do that before the callbacks happen they'll use the default network. 4954 // 4955 // TODO: Is there still a race here? We send the broadcast 4956 // after sending the callback, but if the app can receive the 4957 // broadcast before the callback, it might still break. 4958 // 4959 // This *does* introduce a race where if the user uses the new api 4960 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4961 // they may get old info. Reverse this after the old startUsing api is removed. 4962 // This is on top of the multiple intent sequencing referenced in the todo above. 4963 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 4964 NetworkRequest nr = newNetwork.requestAt(i); 4965 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 4966 // legacy type tracker filters out repeat adds 4967 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4968 } 4969 } 4970 4971 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4972 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4973 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4974 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4975 if (newNetwork.isVPN()) { 4976 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4977 } 4978 } 4979 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4980 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4981 if (unneeded(nai)) { 4982 if (nai.getLingerExpiry() > 0) { 4983 // This network has active linger timers and no requests, but is not 4984 // lingering. Linger it. 4985 // 4986 // One way (the only way?) this can happen if this network is unvalidated 4987 // and became unneeded due to another network improving its score to the 4988 // point where this network will no longer be able to satisfy any requests 4989 // even if it validates. 4990 updateLingerState(nai, now); 4991 } else { 4992 if (DBG) log("Reaping " + nai.name()); 4993 teardownUnneededNetwork(nai); 4994 } 4995 } 4996 } 4997 } 4998 } 4999 5000 /** 5001 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 5002 * being disconnected. 5003 * @param changed If only one Network's score or capabilities have been modified since the last 5004 * time this function was called, pass this Network in this argument, otherwise pass 5005 * null. 5006 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 5007 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 5008 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 5009 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 5010 * network's score. 5011 */ 5012 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 5013 // TODO: This may get slow. The "changed" parameter is provided for future optimization 5014 // to avoid the slowness. It is not simply enough to process just "changed", for 5015 // example in the case where "changed"'s score decreases and another network should begin 5016 // satifying a NetworkRequest that "changed" currently satisfies. 5017 5018 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 5019 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 5020 // rematchNetworkAndRequests() handles. 5021 final long now = SystemClock.elapsedRealtime(); 5022 if (changed != null && oldScore < changed.getCurrentScore()) { 5023 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 5024 } else { 5025 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 5026 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 5027 // Rematch higher scoring networks first to prevent requests first matching a lower 5028 // scoring network and then a higher scoring network, which could produce multiple 5029 // callbacks and inadvertently unlinger networks. 5030 Arrays.sort(nais); 5031 for (NetworkAgentInfo nai : nais) { 5032 rematchNetworkAndRequests(nai, 5033 // Only reap the last time through the loop. Reaping before all rematching 5034 // is complete could incorrectly teardown a network that hasn't yet been 5035 // rematched. 5036 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 5037 : ReapUnvalidatedNetworks.REAP, 5038 now); 5039 } 5040 } 5041 } 5042 5043 private void updateInetCondition(NetworkAgentInfo nai) { 5044 // Don't bother updating until we've graduated to validated at least once. 5045 if (!nai.everValidated) return; 5046 // For now only update icons for default connection. 5047 // TODO: Update WiFi and cellular icons separately. b/17237507 5048 if (!isDefaultNetwork(nai)) return; 5049 5050 int newInetCondition = nai.lastValidated ? 100 : 0; 5051 // Don't repeat publish. 5052 if (newInetCondition == mDefaultInetConditionPublished) return; 5053 5054 mDefaultInetConditionPublished = newInetCondition; 5055 sendInetConditionBroadcast(nai.networkInfo); 5056 } 5057 5058 private void notifyLockdownVpn(NetworkAgentInfo nai) { 5059 if (mLockdownTracker != null) { 5060 if (nai != null && nai.isVPN()) { 5061 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 5062 } else { 5063 mLockdownTracker.onNetworkInfoChanged(); 5064 } 5065 } 5066 } 5067 5068 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 5069 NetworkInfo.State state = newInfo.getState(); 5070 NetworkInfo oldInfo = null; 5071 final int oldScore = networkAgent.getCurrentScore(); 5072 synchronized (networkAgent) { 5073 oldInfo = networkAgent.networkInfo; 5074 networkAgent.networkInfo = newInfo; 5075 } 5076 notifyLockdownVpn(networkAgent); 5077 5078 if (oldInfo != null && oldInfo.getState() == state) { 5079 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 5080 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 5081 notifyIfacesChangedForNetworkStats(); 5082 } else if (VDBG) log("ignoring duplicate network state non-change"); 5083 // In either case, no further work should be needed. 5084 return; 5085 } 5086 if (DBG) { 5087 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 5088 (oldInfo == null ? "null" : oldInfo.getState()) + 5089 " to " + state); 5090 } 5091 5092 if (!networkAgent.created 5093 && (state == NetworkInfo.State.CONNECTED 5094 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 5095 try { 5096 // This should never fail. Specifying an already in use NetID will cause failure. 5097 if (networkAgent.isVPN()) { 5098 mNetd.createVirtualNetwork(networkAgent.network.netId, 5099 !networkAgent.linkProperties.getDnsServers().isEmpty(), 5100 (networkAgent.networkMisc == null || 5101 !networkAgent.networkMisc.allowBypass)); 5102 } else { 5103 mNetd.createPhysicalNetwork(networkAgent.network.netId, 5104 networkAgent.networkCapabilities.hasCapability( 5105 NET_CAPABILITY_NOT_RESTRICTED) ? 5106 null : NetworkManagementService.PERMISSION_SYSTEM); 5107 } 5108 } catch (Exception e) { 5109 loge("Error creating network " + networkAgent.network.netId + ": " 5110 + e.getMessage()); 5111 return; 5112 } 5113 networkAgent.created = true; 5114 } 5115 5116 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 5117 networkAgent.everConnected = true; 5118 5119 updateLinkProperties(networkAgent, null); 5120 notifyIfacesChangedForNetworkStats(); 5121 5122 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 5123 scheduleUnvalidatedPrompt(networkAgent); 5124 5125 if (networkAgent.isVPN()) { 5126 // Temporarily disable the default proxy (not global). 5127 synchronized (mProxyLock) { 5128 if (!mDefaultProxyDisabled) { 5129 mDefaultProxyDisabled = true; 5130 if (mGlobalProxy == null && mDefaultProxy != null) { 5131 sendProxyBroadcast(null); 5132 } 5133 } 5134 } 5135 // TODO: support proxy per network. 5136 } 5137 5138 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5139 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5140 // capabilities, so it only needs to be done once on initial connect, not every time the 5141 // network's capabilities change. Note that we do this before rematching the network, 5142 // so we could decide to tear it down immediately afterwards. That's fine though - on 5143 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5144 // doing. 5145 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5146 5147 // Consider network even though it is not yet validated. 5148 final long now = SystemClock.elapsedRealtime(); 5149 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5150 5151 // This has to happen after matching the requests, because callbacks are just requests. 5152 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5153 } else if (state == NetworkInfo.State.DISCONNECTED) { 5154 networkAgent.asyncChannel.disconnect(); 5155 if (networkAgent.isVPN()) { 5156 synchronized (mProxyLock) { 5157 if (mDefaultProxyDisabled) { 5158 mDefaultProxyDisabled = false; 5159 if (mGlobalProxy == null && mDefaultProxy != null) { 5160 sendProxyBroadcast(mDefaultProxy); 5161 } 5162 } 5163 } 5164 } 5165 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5166 state == NetworkInfo.State.SUSPENDED) { 5167 // going into or coming out of SUSPEND: rescore and notify 5168 if (networkAgent.getCurrentScore() != oldScore) { 5169 rematchAllNetworksAndRequests(networkAgent, oldScore); 5170 } 5171 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5172 ConnectivityManager.CALLBACK_SUSPENDED : 5173 ConnectivityManager.CALLBACK_RESUMED)); 5174 mLegacyTypeTracker.update(networkAgent); 5175 } 5176 } 5177 5178 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5179 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5180 if (score < 0) { 5181 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5182 "). Bumping score to min of 0"); 5183 score = 0; 5184 } 5185 5186 final int oldScore = nai.getCurrentScore(); 5187 nai.setCurrentScore(score); 5188 5189 rematchAllNetworksAndRequests(nai, oldScore); 5190 5191 sendUpdatedScoreToFactories(nai); 5192 } 5193 5194 // notify only this one new request of the current state 5195 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5196 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 5197 if (nri.mPendingIntent == null) { 5198 callCallbackForRequest(nri, nai, notifyType, 0); 5199 } else { 5200 sendPendingIntentForRequest(nri, nai, notifyType); 5201 } 5202 } 5203 5204 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5205 // The NetworkInfo we actually send out has no bearing on the real 5206 // state of affairs. For example, if the default connection is mobile, 5207 // and a request for HIPRI has just gone away, we need to pretend that 5208 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5209 // the state to DISCONNECTED, even though the network is of type MOBILE 5210 // and is still connected. 5211 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5212 info.setType(type); 5213 if (state != DetailedState.DISCONNECTED) { 5214 info.setDetailedState(state, null, info.getExtraInfo()); 5215 sendConnectedBroadcast(info); 5216 } else { 5217 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5218 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5219 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5220 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5221 if (info.isFailover()) { 5222 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5223 nai.networkInfo.setFailover(false); 5224 } 5225 if (info.getReason() != null) { 5226 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5227 } 5228 if (info.getExtraInfo() != null) { 5229 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5230 } 5231 NetworkAgentInfo newDefaultAgent = null; 5232 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5233 newDefaultAgent = getDefaultNetwork(); 5234 if (newDefaultAgent != null) { 5235 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5236 newDefaultAgent.networkInfo); 5237 } else { 5238 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5239 } 5240 } 5241 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5242 mDefaultInetConditionPublished); 5243 sendStickyBroadcast(intent); 5244 if (newDefaultAgent != null) { 5245 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5246 } 5247 } 5248 } 5249 5250 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5251 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5252 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5253 NetworkRequest nr = networkAgent.requestAt(i); 5254 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5255 if (VDBG) log(" sending notification for " + nr); 5256 if (nri.mPendingIntent == null) { 5257 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5258 } else { 5259 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5260 } 5261 } 5262 } 5263 5264 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5265 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5266 } 5267 5268 private String notifyTypeToName(int notifyType) { 5269 switch (notifyType) { 5270 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5271 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5272 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5273 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5274 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5275 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5276 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5277 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5278 } 5279 return "UNKNOWN"; 5280 } 5281 5282 /** 5283 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5284 * properties tracked by NetworkStatsService on an active iface has changed. 5285 */ 5286 private void notifyIfacesChangedForNetworkStats() { 5287 try { 5288 mStatsService.forceUpdateIfaces(); 5289 } catch (Exception ignored) { 5290 } 5291 } 5292 5293 @Override 5294 public boolean addVpnAddress(String address, int prefixLength) { 5295 throwIfLockdownEnabled(); 5296 int user = UserHandle.getUserId(Binder.getCallingUid()); 5297 synchronized (mVpns) { 5298 return mVpns.get(user).addAddress(address, prefixLength); 5299 } 5300 } 5301 5302 @Override 5303 public boolean removeVpnAddress(String address, int prefixLength) { 5304 throwIfLockdownEnabled(); 5305 int user = UserHandle.getUserId(Binder.getCallingUid()); 5306 synchronized (mVpns) { 5307 return mVpns.get(user).removeAddress(address, prefixLength); 5308 } 5309 } 5310 5311 @Override 5312 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5313 throwIfLockdownEnabled(); 5314 int user = UserHandle.getUserId(Binder.getCallingUid()); 5315 boolean success; 5316 synchronized (mVpns) { 5317 success = mVpns.get(user).setUnderlyingNetworks(networks); 5318 } 5319 if (success) { 5320 notifyIfacesChangedForNetworkStats(); 5321 } 5322 return success; 5323 } 5324 5325 @Override 5326 public String getCaptivePortalServerUrl() { 5327 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5328 } 5329 5330 @Override 5331 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5332 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5333 enforceKeepalivePermission(); 5334 mKeepaliveTracker.startNattKeepalive( 5335 getNetworkAgentInfoForNetwork(network), 5336 intervalSeconds, messenger, binder, 5337 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5338 } 5339 5340 @Override 5341 public void stopKeepalive(Network network, int slot) { 5342 mHandler.sendMessage(mHandler.obtainMessage( 5343 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5344 } 5345 5346 @Override 5347 public void factoryReset() { 5348 enforceConnectivityInternalPermission(); 5349 5350 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5351 return; 5352 } 5353 5354 final int userId = UserHandle.getCallingUserId(); 5355 5356 // Turn airplane mode off 5357 setAirplaneMode(false); 5358 5359 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5360 // Untether 5361 for (String tether : getTetheredIfaces()) { 5362 untether(tether); 5363 } 5364 } 5365 5366 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5367 // Remove always-on package 5368 synchronized (mVpns) { 5369 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5370 if (alwaysOnPackage != null) { 5371 setAlwaysOnVpnPackage(userId, null, false); 5372 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5373 } 5374 } 5375 5376 // Turn VPN off 5377 VpnConfig vpnConfig = getVpnConfig(userId); 5378 if (vpnConfig != null) { 5379 if (vpnConfig.legacy) { 5380 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5381 } else { 5382 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5383 // in the future without user intervention. 5384 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5385 5386 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5387 } 5388 } 5389 } 5390 5391 Settings.Global.putString(mContext.getContentResolver(), 5392 Settings.Global.NETWORK_AVOID_BAD_WIFI, null); 5393 } 5394 5395 @VisibleForTesting 5396 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5397 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5398 return new NetworkMonitor(context, handler, nai, defaultRequest); 5399 } 5400 5401 @VisibleForTesting 5402 AvoidBadWifiTracker createAvoidBadWifiTracker(Context c, Handler h, Runnable r) { 5403 return new AvoidBadWifiTracker(c, h, r); 5404 } 5405 5406 @VisibleForTesting 5407 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5408 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5409 } 5410 5411 private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5412 int newNetid = NETID_UNSET; 5413 int prevNetid = NETID_UNSET; 5414 int[] transports = new int[0]; 5415 boolean hadIPv4 = false; 5416 boolean hadIPv6 = false; 5417 5418 if (newNai != null) { 5419 newNetid = newNai.network.netId; 5420 transports = newNai.networkCapabilities.getTransportTypes(); 5421 } 5422 if (prevNai != null) { 5423 prevNetid = prevNai.network.netId; 5424 final LinkProperties lp = prevNai.linkProperties; 5425 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5426 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5427 } 5428 5429 mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); 5430 } 5431 5432 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5433 mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); 5434 } 5435} 5436