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