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.content.pm.PackageManager.PERMISSION_GRANTED; 21 import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 22 import static android.net.ConnectivityManager.NETID_UNSET; 23 import static android.net.ConnectivityManager.TYPE_ETHERNET; 24 import static android.net.ConnectivityManager.TYPE_NONE; 25 import static android.net.ConnectivityManager.TYPE_VPN; 26 import static android.net.ConnectivityManager.getNetworkTypeName; 27 import static android.net.ConnectivityManager.isNetworkTypeValid; 28 import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 29 import static android.net.NetworkCapabilities.NET_CAPABILITY_FOREGROUND; 30 import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 31 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 32 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 33 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING; 34 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_SUSPENDED; 35 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VPN; 36 import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 37 import static android.net.NetworkCapabilities.TRANSPORT_VPN; 38 39 import static com.android.internal.util.Preconditions.checkNotNull; 40 41 import android.annotation.Nullable; 42 import android.app.BroadcastOptions; 43 import android.app.NotificationManager; 44 import android.app.PendingIntent; 45 import android.content.BroadcastReceiver; 46 import android.content.ContentResolver; 47 import android.content.Context; 48 import android.content.Intent; 49 import android.content.IntentFilter; 50 import android.content.res.Configuration; 51 import android.database.ContentObserver; 52 import android.net.ConnectivityManager; 53 import android.net.ConnectivityManager.PacketKeepalive; 54 import android.net.IConnectivityManager; 55 import android.net.IIpConnectivityMetrics; 56 import android.net.INetdEventCallback; 57 import android.net.INetworkManagementEventObserver; 58 import android.net.INetworkPolicyListener; 59 import android.net.INetworkPolicyManager; 60 import android.net.INetworkStatsService; 61 import android.net.LinkProperties; 62 import android.net.LinkProperties.CompareResult; 63 import android.net.MatchAllNetworkSpecifier; 64 import android.net.Network; 65 import android.net.NetworkAgent; 66 import android.net.NetworkCapabilities; 67 import android.net.NetworkConfig; 68 import android.net.NetworkInfo; 69 import android.net.NetworkInfo.DetailedState; 70 import android.net.NetworkMisc; 71 import android.net.NetworkPolicyManager; 72 import android.net.NetworkQuotaInfo; 73 import android.net.NetworkRequest; 74 import android.net.NetworkSpecifier; 75 import android.net.NetworkState; 76 import android.net.NetworkUtils; 77 import android.net.NetworkWatchlistManager; 78 import android.net.Proxy; 79 import android.net.ProxyInfo; 80 import android.net.RouteInfo; 81 import android.net.UidRange; 82 import android.net.Uri; 83 import android.net.VpnService; 84 import android.net.metrics.IpConnectivityLog; 85 import android.net.metrics.NetworkEvent; 86 import android.net.util.MultinetworkPolicyTracker; 87 import android.os.Binder; 88 import android.os.Build; 89 import android.os.Bundle; 90 import android.os.FileUtils; 91 import android.os.Handler; 92 import android.os.HandlerThread; 93 import android.os.IBinder; 94 import android.os.INetworkManagementService; 95 import android.os.Looper; 96 import android.os.Message; 97 import android.os.Messenger; 98 import android.os.ParcelFileDescriptor; 99 import android.os.Parcelable; 100 import android.os.PowerManager; 101 import android.os.Process; 102 import android.os.RemoteException; 103 import android.os.ResultReceiver; 104 import android.os.ServiceManager; 105 import android.os.ServiceSpecificException; 106 import android.os.ShellCallback; 107 import android.os.ShellCommand; 108 import android.os.SystemClock; 109 import android.os.UserHandle; 110 import android.os.UserManager; 111 import android.provider.Settings; 112 import android.security.Credentials; 113 import android.security.KeyStore; 114 import android.telephony.TelephonyManager; 115 import android.text.TextUtils; 116 import android.util.ArraySet; 117 import android.util.LocalLog; 118 import android.util.LocalLog.ReadOnlyLocalLog; 119 import android.util.Log; 120 import android.util.Slog; 121 import android.util.SparseArray; 122 import android.util.SparseBooleanArray; 123 import android.util.SparseIntArray; 124 import android.util.Xml; 125 126 import com.android.internal.R; 127 import com.android.internal.annotations.GuardedBy; 128 import com.android.internal.annotations.VisibleForTesting; 129 import com.android.internal.app.IBatteryStats; 130 import com.android.internal.net.LegacyVpnInfo; 131 import com.android.internal.net.NetworkStatsFactory; 132 import com.android.internal.net.VpnConfig; 133 import com.android.internal.net.VpnInfo; 134 import com.android.internal.net.VpnProfile; 135 import com.android.internal.util.ArrayUtils; 136 import com.android.internal.util.AsyncChannel; 137 import com.android.internal.util.DumpUtils; 138 import com.android.internal.util.IndentingPrintWriter; 139 import com.android.internal.util.MessageUtils; 140 import com.android.internal.util.WakeupMessage; 141 import com.android.internal.util.XmlUtils; 142 import com.android.server.am.BatteryStatsService; 143 import com.android.server.connectivity.DataConnectionStats; 144 import com.android.server.connectivity.DnsManager; 145 import com.android.server.connectivity.DnsManager.PrivateDnsConfig; 146 import com.android.server.connectivity.DnsManager.PrivateDnsValidationUpdate; 147 import com.android.server.connectivity.IpConnectivityMetrics; 148 import com.android.server.connectivity.KeepaliveTracker; 149 import com.android.server.connectivity.LingerMonitor; 150 import com.android.server.connectivity.MockableSystemProperties; 151 import com.android.server.connectivity.MultipathPolicyTracker; 152 import com.android.server.connectivity.NetworkAgentInfo; 153 import com.android.server.connectivity.NetworkDiagnostics; 154 import com.android.server.connectivity.NetworkMonitor; 155 import com.android.server.connectivity.NetworkNotificationManager; 156 import com.android.server.connectivity.NetworkNotificationManager.NotificationType; 157 import com.android.server.connectivity.PacManager; 158 import com.android.server.connectivity.PermissionMonitor; 159 import com.android.server.connectivity.Tethering; 160 import com.android.server.connectivity.Vpn; 161 import com.android.server.connectivity.tethering.TetheringDependencies; 162 import com.android.server.net.BaseNetdEventCallback; 163 import com.android.server.net.BaseNetworkObserver; 164 import com.android.server.net.LockdownVpnTracker; 165 import com.android.server.net.NetworkPolicyManagerInternal; 166 import com.android.server.utils.PriorityDump; 167 168 import com.google.android.collect.Lists; 169 170 import org.xmlpull.v1.XmlPullParser; 171 import org.xmlpull.v1.XmlPullParserException; 172 173 import java.io.File; 174 import java.io.FileDescriptor; 175 import java.io.FileNotFoundException; 176 import java.io.FileReader; 177 import java.io.IOException; 178 import java.io.PrintWriter; 179 import java.net.Inet4Address; 180 import java.net.InetAddress; 181 import java.net.UnknownHostException; 182 import java.util.ArrayDeque; 183 import java.util.ArrayList; 184 import java.util.Arrays; 185 import java.util.Collection; 186 import java.util.HashMap; 187 import java.util.HashSet; 188 import java.util.List; 189 import java.util.Map; 190 import java.util.Objects; 191 import java.util.Set; 192 import java.util.SortedSet; 193 import java.util.TreeSet; 194 195 /** 196 * @hide 197 */ 198 public class ConnectivityService extends IConnectivityManager.Stub 199 implements PendingIntent.OnFinished { 200 private static final String TAG = ConnectivityService.class.getSimpleName(); 201 202 public static final String DIAG_ARG = "--diag"; 203 public static final String SHORT_ARG = "--short"; 204 public static final String TETHERING_ARG = "tethering"; 205 206 private static final boolean DBG = true; 207 private static final boolean VDBG = false; 208 209 private static final boolean LOGD_RULES = false; 210 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 211 212 // TODO: create better separation between radio types and network types 213 214 // how long to wait before switching back to a radio's default network 215 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 216 // system property that can override the above value 217 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 218 "android.telephony.apn-restore"; 219 220 // How long to wait before putting up a "This network doesn't have an Internet connection, 221 // connect anyway?" dialog after the user selects a network that doesn't validate. 222 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 223 224 // Default to 30s linger time-out. Modifiable only for testing. 225 private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; 226 private static final int DEFAULT_LINGER_DELAY_MS = 30_000; 227 @VisibleForTesting 228 protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it. 229 230 // How long to delay to removal of a pending intent based request. 231 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 232 private final int mReleasePendingIntentDelayMs; 233 234 private MockableSystemProperties mSystemProperties; 235 236 private Tethering mTethering; 237 238 private final PermissionMonitor mPermissionMonitor; 239 240 private KeyStore mKeyStore; 241 242 @VisibleForTesting 243 @GuardedBy("mVpns") 244 protected final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 245 246 // TODO: investigate if mLockdownEnabled can be removed and replaced everywhere by 247 // a direct call to LockdownVpnTracker.isEnabled(). 248 @GuardedBy("mVpns") 249 private boolean mLockdownEnabled; 250 @GuardedBy("mVpns") 251 private LockdownVpnTracker mLockdownTracker; 252 253 final private Context mContext; 254 private int mNetworkPreference; 255 // 0 is full bad, 100 is full good 256 private int mDefaultInetConditionPublished = 0; 257 258 private boolean mTestMode; 259 private static ConnectivityService sServiceInstance; 260 261 private INetworkManagementService mNetd; 262 private INetworkStatsService mStatsService; 263 private INetworkPolicyManager mPolicyManager; 264 private NetworkPolicyManagerInternal mPolicyManagerInternal; 265 private IIpConnectivityMetrics mIpConnectivityMetrics; 266 267 private String mCurrentTcpBufferSizes; 268 269 private static final int ENABLED = 1; 270 private static final int DISABLED = 0; 271 272 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 273 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class, 274 NetworkAgentInfo.class }); 275 276 private enum ReapUnvalidatedNetworks { 277 // Tear down networks that have no chance (e.g. even if validated) of becoming 278 // the highest scoring network satisfying a NetworkRequest. This should be passed when 279 // all networks have been rematched against all NetworkRequests. 280 REAP, 281 // Don't reap networks. This should be passed when some networks have not yet been 282 // rematched against all NetworkRequests. 283 DONT_REAP 284 }; 285 286 private enum UnneededFor { 287 LINGER, // Determine whether this network is unneeded and should be lingered. 288 TEARDOWN, // Determine whether this network is unneeded and should be torn down. 289 } 290 291 /** 292 * used internally to change our mobile data enabled flag 293 */ 294 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 295 296 /** 297 * used internally to clear a wakelock when transitioning 298 * from one net to another. Clear happens when we get a new 299 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 300 * after a timeout if no network is found (typically 1 min). 301 */ 302 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 303 304 /** 305 * used internally to reload global proxy settings 306 */ 307 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 308 309 /** 310 * PAC manager has received new port. 311 */ 312 private static final int EVENT_PROXY_HAS_CHANGED = 16; 313 314 /** 315 * used internally when registering NetworkFactories 316 * obj = NetworkFactoryInfo 317 */ 318 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 319 320 /** 321 * used internally when registering NetworkAgents 322 * obj = Messenger 323 */ 324 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 325 326 /** 327 * used to add a network request 328 * includes a NetworkRequestInfo 329 */ 330 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 331 332 /** 333 * indicates a timeout period is over - check if we had a network yet or not 334 * and if not, call the timeout callback (but leave the request live until they 335 * cancel it. 336 * includes a NetworkRequestInfo 337 */ 338 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 339 340 /** 341 * used to add a network listener - no request 342 * includes a NetworkRequestInfo 343 */ 344 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 345 346 /** 347 * used to remove a network request, either a listener or a real request 348 * arg1 = UID of caller 349 * obj = NetworkRequest 350 */ 351 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 352 353 /** 354 * used internally when registering NetworkFactories 355 * obj = Messenger 356 */ 357 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 358 359 /** 360 * used internally to expire a wakelock when transitioning 361 * from one net to another. Expire happens when we fail to find 362 * a new network (typically after 1 minute) - 363 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 364 * a replacement network. 365 */ 366 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 367 368 /** 369 * Used internally to indicate the system is ready. 370 */ 371 private static final int EVENT_SYSTEM_READY = 25; 372 373 /** 374 * used to add a network request with a pending intent 375 * obj = NetworkRequestInfo 376 */ 377 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 378 379 /** 380 * used to remove a pending intent and its associated network request. 381 * arg1 = UID of caller 382 * obj = PendingIntent 383 */ 384 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 385 386 /** 387 * used to specify whether a network should be used even if unvalidated. 388 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 389 * arg2 = whether to remember this choice in the future (1 or 0) 390 * obj = network 391 */ 392 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 393 394 /** 395 * used to ask the user to confirm a connection to an unvalidated network. 396 * obj = network 397 */ 398 private static final int EVENT_PROMPT_UNVALIDATED = 29; 399 400 /** 401 * used internally to (re)configure mobile data always-on settings. 402 */ 403 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 404 405 /** 406 * used to add a network listener with a pending intent 407 * obj = NetworkRequestInfo 408 */ 409 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 410 411 /** 412 * used to specify whether a network should not be penalized when it becomes unvalidated. 413 */ 414 private static final int EVENT_SET_AVOID_UNVALIDATED = 35; 415 416 /** 417 * used to trigger revalidation of a network. 418 */ 419 private static final int EVENT_REVALIDATE_NETWORK = 36; 420 421 // Handle changes in Private DNS settings. 422 private static final int EVENT_PRIVATE_DNS_SETTINGS_CHANGED = 37; 423 424 // Handle private DNS validation status updates. 425 private static final int EVENT_PRIVATE_DNS_VALIDATION_UPDATE = 38; 426 427 private static String eventName(int what) { 428 return sMagicDecoderRing.get(what, Integer.toString(what)); 429 } 430 431 /** Handler thread used for both of the handlers below. */ 432 @VisibleForTesting 433 protected final HandlerThread mHandlerThread; 434 /** Handler used for internal events. */ 435 final private InternalHandler mHandler; 436 /** Handler used for incoming {@link NetworkStateTracker} events. */ 437 final private NetworkStateTrackerHandler mTrackerHandler; 438 private final DnsManager mDnsManager; 439 440 private boolean mSystemReady; 441 private Intent mInitialBroadcast; 442 443 private PowerManager.WakeLock mNetTransitionWakeLock; 444 private int mNetTransitionWakeLockTimeout; 445 private final PowerManager.WakeLock mPendingIntentWakeLock; 446 447 // track the current default http proxy - tell the world if we get a new one (real change) 448 private volatile ProxyInfo mDefaultProxy = null; 449 private Object mProxyLock = new Object(); 450 private boolean mDefaultProxyDisabled = false; 451 452 // track the global proxy. 453 private ProxyInfo mGlobalProxy = null; 454 455 private PacManager mPacManager = null; 456 457 final private SettingsObserver mSettingsObserver; 458 459 private UserManager mUserManager; 460 461 NetworkConfig[] mNetConfigs; 462 int mNetworksDefined; 463 464 // the set of network types that can only be enabled by system/sig apps 465 List mProtectedNetworks; 466 467 private DataConnectionStats mDataConnectionStats; 468 469 TelephonyManager mTelephonyManager; 470 471 private KeepaliveTracker mKeepaliveTracker; 472 private NetworkNotificationManager mNotifier; 473 private LingerMonitor mLingerMonitor; 474 475 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 476 private static final int MIN_NET_ID = 100; // some reserved marks 477 private static final int MAX_NET_ID = 65535 - 0x0400; // Top 1024 bits reserved by IpSecService 478 private int mNextNetId = MIN_NET_ID; 479 480 // sequence number of NetworkRequests 481 private int mNextNetworkRequestId = 1; 482 483 // NetworkRequest activity String log entries. 484 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 485 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 486 487 // NetworkInfo blocked and unblocked String log entries 488 private static final int MAX_NETWORK_INFO_LOGS = 40; 489 private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); 490 491 private static final int MAX_WAKELOCK_LOGS = 20; 492 private final LocalLog mWakelockLogs = new LocalLog(MAX_WAKELOCK_LOGS); 493 private int mTotalWakelockAcquisitions = 0; 494 private int mTotalWakelockReleases = 0; 495 private long mTotalWakelockDurationMs = 0; 496 private long mMaxWakelockDurationMs = 0; 497 private long mLastWakeLockAcquireTimestamp = 0; 498 499 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 500 private static final int MAX_VALIDATION_LOGS = 10; 501 private static class ValidationLog { 502 final Network mNetwork; 503 final String mName; 504 final ReadOnlyLocalLog mLog; 505 506 ValidationLog(Network network, String name, ReadOnlyLocalLog log) { 507 mNetwork = network; 508 mName = name; 509 mLog = log; 510 } 511 } 512 private final ArrayDeque<ValidationLog> mValidationLogs = 513 new ArrayDeque<ValidationLog>(MAX_VALIDATION_LOGS); 514 515 private void addValidationLogs(ReadOnlyLocalLog log, Network network, String name) { 516 synchronized (mValidationLogs) { 517 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 518 mValidationLogs.removeLast(); 519 } 520 mValidationLogs.addFirst(new ValidationLog(network, name, log)); 521 } 522 } 523 524 private final IpConnectivityLog mMetricsLog; 525 526 @VisibleForTesting 527 final MultinetworkPolicyTracker mMultinetworkPolicyTracker; 528 529 @VisibleForTesting 530 final MultipathPolicyTracker mMultipathPolicyTracker; 531 532 /** 533 * Implements support for the legacy "one network per network type" model. 534 * 535 * We used to have a static array of NetworkStateTrackers, one for each 536 * network type, but that doesn't work any more now that we can have, 537 * for example, more that one wifi network. This class stores all the 538 * NetworkAgentInfo objects that support a given type, but the legacy 539 * API will only see the first one. 540 * 541 * It serves two main purposes: 542 * 543 * 1. Provide information about "the network for a given type" (since this 544 * API only supports one). 545 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 546 * the first network for a given type changes, or if the default network 547 * changes. 548 */ 549 private class LegacyTypeTracker { 550 551 private static final boolean DBG = true; 552 private static final boolean VDBG = false; 553 554 /** 555 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 556 * Each list holds references to all NetworkAgentInfos that are used to 557 * satisfy requests for that network type. 558 * 559 * This array is built out at startup such that an unsupported network 560 * doesn't get an ArrayList instance, making this a tristate: 561 * unsupported, supported but not active and active. 562 * 563 * The actual lists are populated when we scan the network types that 564 * are supported on this device. 565 * 566 * Threading model: 567 * - addSupportedType() is only called in the constructor 568 * - add(), update(), remove() are only called from the ConnectivityService handler thread. 569 * They are therefore not thread-safe with respect to each other. 570 * - getNetworkForType() can be called at any time on binder threads. It is synchronized 571 * on mTypeLists to be thread-safe with respect to a concurrent remove call. 572 * - dump is thread-safe with respect to concurrent add and remove calls. 573 */ 574 private final ArrayList<NetworkAgentInfo> mTypeLists[]; 575 576 public LegacyTypeTracker() { 577 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 578 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 579 } 580 581 public void addSupportedType(int type) { 582 if (mTypeLists[type] != null) { 583 throw new IllegalStateException( 584 "legacy list for type " + type + "already initialized"); 585 } 586 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 587 } 588 589 public boolean isTypeSupported(int type) { 590 return isNetworkTypeValid(type) && mTypeLists[type] != null; 591 } 592 593 public NetworkAgentInfo getNetworkForType(int type) { 594 synchronized (mTypeLists) { 595 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 596 return mTypeLists[type].get(0); 597 } 598 } 599 return null; 600 } 601 602 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 603 boolean isDefaultNetwork) { 604 if (DBG) { 605 log("Sending " + state + 606 " broadcast for type " + type + " " + nai.name() + 607 " isDefaultNetwork=" + isDefaultNetwork); 608 } 609 } 610 611 /** Adds the given network to the specified legacy type list. */ 612 public void add(int type, NetworkAgentInfo nai) { 613 if (!isTypeSupported(type)) { 614 return; // Invalid network type. 615 } 616 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 617 618 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 619 if (list.contains(nai)) { 620 return; 621 } 622 synchronized (mTypeLists) { 623 list.add(nai); 624 } 625 626 // Send a broadcast if this is the first network of its type or if it's the default. 627 final boolean isDefaultNetwork = isDefaultNetwork(nai); 628 if ((list.size() == 1) || isDefaultNetwork) { 629 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 630 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 631 } 632 } 633 634 /** Removes the given network from the specified legacy type list. */ 635 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 636 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 637 if (list == null || list.isEmpty()) { 638 return; 639 } 640 final boolean wasFirstNetwork = list.get(0).equals(nai); 641 642 synchronized (mTypeLists) { 643 if (!list.remove(nai)) { 644 return; 645 } 646 } 647 648 final DetailedState state = DetailedState.DISCONNECTED; 649 650 if (wasFirstNetwork || wasDefault) { 651 maybeLogBroadcast(nai, state, type, wasDefault); 652 sendLegacyNetworkBroadcast(nai, state, type); 653 } 654 655 if (!list.isEmpty() && wasFirstNetwork) { 656 if (DBG) log("Other network available for type " + type + 657 ", sending connected broadcast"); 658 final NetworkAgentInfo replacement = list.get(0); 659 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 660 sendLegacyNetworkBroadcast(replacement, state, type); 661 } 662 } 663 664 /** Removes the given network from all legacy type lists. */ 665 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 666 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 667 for (int type = 0; type < mTypeLists.length; type++) { 668 remove(type, nai, wasDefault); 669 } 670 } 671 672 // send out another legacy broadcast - currently only used for suspend/unsuspend 673 // toggle 674 public void update(NetworkAgentInfo nai) { 675 final boolean isDefault = isDefaultNetwork(nai); 676 final DetailedState state = nai.networkInfo.getDetailedState(); 677 for (int type = 0; type < mTypeLists.length; type++) { 678 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 679 final boolean contains = (list != null && list.contains(nai)); 680 final boolean isFirst = contains && (nai == list.get(0)); 681 if (isFirst || contains && isDefault) { 682 maybeLogBroadcast(nai, state, type, isDefault); 683 sendLegacyNetworkBroadcast(nai, state, type); 684 } 685 } 686 } 687 688 private String naiToString(NetworkAgentInfo nai) { 689 String name = (nai != null) ? nai.name() : "null"; 690 String state = (nai.networkInfo != null) ? 691 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 692 "???/???"; 693 return name + " " + state; 694 } 695 696 public void dump(IndentingPrintWriter pw) { 697 pw.println("mLegacyTypeTracker:"); 698 pw.increaseIndent(); 699 pw.print("Supported types:"); 700 for (int type = 0; type < mTypeLists.length; type++) { 701 if (mTypeLists[type] != null) pw.print(" " + type); 702 } 703 pw.println(); 704 pw.println("Current state:"); 705 pw.increaseIndent(); 706 synchronized (mTypeLists) { 707 for (int type = 0; type < mTypeLists.length; type++) { 708 if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; 709 for (NetworkAgentInfo nai : mTypeLists[type]) { 710 pw.println(type + " " + naiToString(nai)); 711 } 712 } 713 } 714 pw.decreaseIndent(); 715 pw.decreaseIndent(); 716 pw.println(); 717 } 718 } 719 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 720 721 /** 722 * Helper class which parses out priority arguments and dumps sections according to their 723 * priority. If priority arguments are omitted, function calls the legacy dump command. 724 */ 725 private final PriorityDump.PriorityDumper mPriorityDumper = new PriorityDump.PriorityDumper() { 726 @Override 727 public void dumpHigh(FileDescriptor fd, PrintWriter pw, String[] args, boolean asProto) { 728 doDump(fd, pw, new String[] {DIAG_ARG}, asProto); 729 doDump(fd, pw, new String[] {SHORT_ARG}, asProto); 730 } 731 732 @Override 733 public void dumpNormal(FileDescriptor fd, PrintWriter pw, String[] args, boolean asProto) { 734 doDump(fd, pw, args, asProto); 735 } 736 737 @Override 738 public void dump(FileDescriptor fd, PrintWriter pw, String[] args, boolean asProto) { 739 doDump(fd, pw, args, asProto); 740 } 741 }; 742 743 public ConnectivityService(Context context, INetworkManagementService netManager, 744 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 745 this(context, netManager, statsService, policyManager, new IpConnectivityLog()); 746 } 747 748 @VisibleForTesting 749 protected ConnectivityService(Context context, INetworkManagementService netManager, 750 INetworkStatsService statsService, INetworkPolicyManager policyManager, 751 IpConnectivityLog logger) { 752 if (DBG) log("ConnectivityService starting up"); 753 754 mSystemProperties = getSystemProperties(); 755 756 mMetricsLog = logger; 757 mDefaultRequest = createDefaultInternetRequestForTransport(-1, NetworkRequest.Type.REQUEST); 758 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); 759 mNetworkRequests.put(mDefaultRequest, defaultNRI); 760 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 761 762 mDefaultMobileDataRequest = createDefaultInternetRequestForTransport( 763 NetworkCapabilities.TRANSPORT_CELLULAR, NetworkRequest.Type.BACKGROUND_REQUEST); 764 765 mHandlerThread = new HandlerThread("ConnectivityServiceThread"); 766 mHandlerThread.start(); 767 mHandler = new InternalHandler(mHandlerThread.getLooper()); 768 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 769 770 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 771 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 772 773 mLingerDelayMs = mSystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); 774 775 mContext = checkNotNull(context, "missing Context"); 776 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 777 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 778 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 779 mPolicyManagerInternal = checkNotNull( 780 LocalServices.getService(NetworkPolicyManagerInternal.class), 781 "missing NetworkPolicyManagerInternal"); 782 783 mKeyStore = KeyStore.getInstance(); 784 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 785 786 try { 787 mPolicyManager.registerListener(mPolicyListener); 788 } catch (RemoteException e) { 789 // ouch, no rules updates means some processes may never get network 790 loge("unable to register INetworkPolicyListener" + e); 791 } 792 793 final PowerManager powerManager = (PowerManager) context.getSystemService( 794 Context.POWER_SERVICE); 795 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 796 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 797 com.android.internal.R.integer.config_networkTransitionTimeout); 798 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 799 800 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 801 802 // TODO: What is the "correct" way to do determine if this is a wifi only device? 803 boolean wifiOnly = mSystemProperties.getBoolean("ro.radio.noril", false); 804 log("wifiOnly=" + wifiOnly); 805 String[] naStrings = context.getResources().getStringArray( 806 com.android.internal.R.array.networkAttributes); 807 for (String naString : naStrings) { 808 try { 809 NetworkConfig n = new NetworkConfig(naString); 810 if (VDBG) log("naString=" + naString + " config=" + n); 811 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 812 loge("Error in networkAttributes - ignoring attempt to define type " + 813 n.type); 814 continue; 815 } 816 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 817 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 818 n.type); 819 continue; 820 } 821 if (mNetConfigs[n.type] != null) { 822 loge("Error in networkAttributes - ignoring attempt to redefine type " + 823 n.type); 824 continue; 825 } 826 mLegacyTypeTracker.addSupportedType(n.type); 827 828 mNetConfigs[n.type] = n; 829 mNetworksDefined++; 830 } catch(Exception e) { 831 // ignore it - leave the entry null 832 } 833 } 834 835 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 836 if (mNetConfigs[TYPE_VPN] == null) { 837 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 838 // don't need to add TYPE_VPN to mNetConfigs. 839 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 840 mNetworksDefined++; // used only in the log() statement below. 841 } 842 843 // Do the same for Ethernet, since it's often not specified in the configs, although many 844 // devices can use it via USB host adapters. 845 if (mNetConfigs[TYPE_ETHERNET] == null && hasService(Context.ETHERNET_SERVICE)) { 846 mLegacyTypeTracker.addSupportedType(TYPE_ETHERNET); 847 mNetworksDefined++; 848 } 849 850 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 851 852 mProtectedNetworks = new ArrayList<Integer>(); 853 int[] protectedNetworks = context.getResources().getIntArray( 854 com.android.internal.R.array.config_protectedNetworks); 855 for (int p : protectedNetworks) { 856 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 857 mProtectedNetworks.add(p); 858 } else { 859 if (DBG) loge("Ignoring protectedNetwork " + p); 860 } 861 } 862 863 mTestMode = mSystemProperties.get("cm.test.mode").equals("true") 864 && mSystemProperties.get("ro.build.type").equals("eng"); 865 866 mTethering = makeTethering(); 867 868 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 869 870 //set up the listener for user state for creating user VPNs 871 IntentFilter intentFilter = new IntentFilter(); 872 intentFilter.addAction(Intent.ACTION_USER_STARTED); 873 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 874 intentFilter.addAction(Intent.ACTION_USER_ADDED); 875 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 876 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 877 mContext.registerReceiverAsUser( 878 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 879 mContext.registerReceiverAsUser(mUserPresentReceiver, UserHandle.SYSTEM, 880 new IntentFilter(Intent.ACTION_USER_PRESENT), null, null); 881 882 try { 883 mNetd.registerObserver(mTethering); 884 mNetd.registerObserver(mDataActivityObserver); 885 } catch (RemoteException e) { 886 loge("Error registering observer :" + e); 887 } 888 889 mSettingsObserver = new SettingsObserver(mContext, mHandler); 890 registerSettingsCallbacks(); 891 892 mDataConnectionStats = new DataConnectionStats(mContext); 893 mDataConnectionStats.startMonitoring(); 894 895 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 896 897 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 898 899 mKeepaliveTracker = new KeepaliveTracker(mHandler); 900 mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager, 901 mContext.getSystemService(NotificationManager.class)); 902 903 final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(), 904 Settings.Global.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT, 905 LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT); 906 final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(), 907 Settings.Global.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS, 908 LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS); 909 mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit); 910 911 mMultinetworkPolicyTracker = createMultinetworkPolicyTracker( 912 mContext, mHandler, () -> rematchForAvoidBadWifiUpdate()); 913 mMultinetworkPolicyTracker.start(); 914 915 mMultipathPolicyTracker = new MultipathPolicyTracker(mContext, mHandler); 916 917 mDnsManager = new DnsManager(mContext, mNetd, mSystemProperties); 918 registerPrivateDnsSettingsCallbacks(); 919 } 920 921 private Tethering makeTethering() { 922 // TODO: Move other elements into @Overridden getters. 923 final TetheringDependencies deps = new TetheringDependencies() { 924 @Override 925 public boolean isTetheringSupported() { 926 return ConnectivityService.this.isTetheringSupported(); 927 } 928 }; 929 return new Tethering(mContext, mNetd, mStatsService, mPolicyManager, 930 IoThread.get().getLooper(), new MockableSystemProperties(), 931 deps); 932 } 933 934 private static NetworkCapabilities createDefaultNetworkCapabilitiesForUid(int uid) { 935 final NetworkCapabilities netCap = new NetworkCapabilities(); 936 netCap.addCapability(NET_CAPABILITY_INTERNET); 937 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 938 netCap.removeCapability(NET_CAPABILITY_NOT_VPN); 939 netCap.setSingleUid(uid); 940 return netCap; 941 } 942 943 private NetworkRequest createDefaultInternetRequestForTransport( 944 int transportType, NetworkRequest.Type type) { 945 NetworkCapabilities netCap = new NetworkCapabilities(); 946 netCap.addCapability(NET_CAPABILITY_INTERNET); 947 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 948 if (transportType > -1) { 949 netCap.addTransportType(transportType); 950 } 951 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type); 952 } 953 954 // Used only for testing. 955 // TODO: Delete this and either: 956 // 1. Give FakeSettingsProvider the ability to send settings change notifications (requires 957 // changing ContentResolver to make registerContentObserver non-final). 958 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 959 // by subclassing SettingsObserver. 960 @VisibleForTesting 961 void updateMobileDataAlwaysOn() { 962 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 963 } 964 965 // See FakeSettingsProvider comment above. 966 @VisibleForTesting 967 void updatePrivateDnsSettings() { 968 mHandler.sendEmptyMessage(EVENT_PRIVATE_DNS_SETTINGS_CHANGED); 969 } 970 971 private void handleMobileDataAlwaysOn() { 972 final boolean enable = toBool(Settings.Global.getInt( 973 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 1)); 974 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 975 if (enable == isEnabled) { 976 return; // Nothing to do. 977 } 978 979 if (enable) { 980 handleRegisterNetworkRequest(new NetworkRequestInfo( 981 null, mDefaultMobileDataRequest, new Binder())); 982 } else { 983 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 984 } 985 } 986 987 private void registerSettingsCallbacks() { 988 // Watch for global HTTP proxy changes. 989 mSettingsObserver.observe( 990 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 991 EVENT_APPLY_GLOBAL_HTTP_PROXY); 992 993 // Watch for whether or not to keep mobile data always on. 994 mSettingsObserver.observe( 995 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 996 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 997 } 998 999 private void registerPrivateDnsSettingsCallbacks() { 1000 for (Uri uri : DnsManager.getPrivateDnsSettingsUris()) { 1001 mSettingsObserver.observe(uri, EVENT_PRIVATE_DNS_SETTINGS_CHANGED); 1002 } 1003 } 1004 1005 private synchronized int nextNetworkRequestId() { 1006 return mNextNetworkRequestId++; 1007 } 1008 1009 @VisibleForTesting 1010 protected int reserveNetId() { 1011 synchronized (mNetworkForNetId) { 1012 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 1013 int netId = mNextNetId; 1014 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 1015 // Make sure NetID unused. http://b/16815182 1016 if (!mNetIdInUse.get(netId)) { 1017 mNetIdInUse.put(netId, true); 1018 return netId; 1019 } 1020 } 1021 } 1022 throw new IllegalStateException("No free netIds"); 1023 } 1024 1025 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 1026 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 1027 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1028 final NetworkState state; 1029 if (nai != null) { 1030 state = nai.getNetworkState(); 1031 state.networkInfo.setType(networkType); 1032 } else { 1033 final NetworkInfo info = new NetworkInfo(networkType, 0, 1034 getNetworkTypeName(networkType), ""); 1035 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 1036 info.setIsAvailable(true); 1037 final NetworkCapabilities capabilities = new NetworkCapabilities(); 1038 capabilities.setCapability(NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING, 1039 !info.isRoaming()); 1040 state = new NetworkState(info, new LinkProperties(), capabilities, 1041 null, null, null); 1042 } 1043 filterNetworkStateForUid(state, uid, ignoreBlocked); 1044 return state; 1045 } else { 1046 return NetworkState.EMPTY; 1047 } 1048 } 1049 1050 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 1051 if (network == null) { 1052 return null; 1053 } 1054 return getNetworkAgentInfoForNetId(network.netId); 1055 } 1056 1057 private NetworkAgentInfo getNetworkAgentInfoForNetId(int netId) { 1058 synchronized (mNetworkForNetId) { 1059 return mNetworkForNetId.get(netId); 1060 } 1061 } 1062 1063 private Network[] getVpnUnderlyingNetworks(int uid) { 1064 synchronized (mVpns) { 1065 if (!mLockdownEnabled) { 1066 int user = UserHandle.getUserId(uid); 1067 Vpn vpn = mVpns.get(user); 1068 if (vpn != null && vpn.appliesToUid(uid)) { 1069 return vpn.getUnderlyingNetworks(); 1070 } 1071 } 1072 } 1073 return null; 1074 } 1075 1076 private NetworkState getUnfilteredActiveNetworkState(int uid) { 1077 NetworkAgentInfo nai = getDefaultNetwork(); 1078 1079 final Network[] networks = getVpnUnderlyingNetworks(uid); 1080 if (networks != null) { 1081 // getUnderlyingNetworks() returns: 1082 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 1083 // empty array => the VPN explicitly said "no default network". 1084 // non-empty array => the VPN specified one or more default networks; we use the 1085 // first one. 1086 if (networks.length > 0) { 1087 nai = getNetworkAgentInfoForNetwork(networks[0]); 1088 } else { 1089 nai = null; 1090 } 1091 } 1092 1093 if (nai != null) { 1094 return nai.getNetworkState(); 1095 } else { 1096 return NetworkState.EMPTY; 1097 } 1098 } 1099 1100 /** 1101 * Check if UID should be blocked from using the network with the given LinkProperties. 1102 */ 1103 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 1104 boolean ignoreBlocked) { 1105 // Networks aren't blocked when ignoring blocked status 1106 if (ignoreBlocked) { 1107 return false; 1108 } 1109 // Networks are never blocked for system services 1110 // TODO: consider moving this check to NetworkPolicyManagerInternal.isUidNetworkingBlocked. 1111 if (isSystem(uid)) { 1112 return false; 1113 } 1114 synchronized (mVpns) { 1115 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 1116 if (vpn != null && vpn.isBlockingUid(uid)) { 1117 return true; 1118 } 1119 } 1120 final String iface = (lp == null ? "" : lp.getInterfaceName()); 1121 return mPolicyManagerInternal.isUidNetworkingBlocked(uid, iface); 1122 } 1123 1124 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1125 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1126 return; 1127 } 1128 final boolean blocked; 1129 synchronized (mBlockedAppUids) { 1130 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1131 blocked = true; 1132 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1133 blocked = false; 1134 } else { 1135 return; 1136 } 1137 } 1138 String action = blocked ? "BLOCKED" : "UNBLOCKED"; 1139 log(String.format("Returning %s NetworkInfo to uid=%d", action, uid)); 1140 mNetworkInfoBlockingLogs.log(action + " " + uid); 1141 } 1142 1143 /** 1144 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1145 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1146 * on {@link #isNetworkWithLinkPropertiesBlocked}. 1147 */ 1148 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1149 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1150 1151 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1152 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1153 } 1154 synchronized (mVpns) { 1155 if (mLockdownTracker != null) { 1156 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1157 } 1158 } 1159 } 1160 1161 /** 1162 * Return NetworkInfo for the active (i.e., connected) network interface. 1163 * It is assumed that at most one network is active at a time. If more 1164 * than one is active, it is indeterminate which will be returned. 1165 * @return the info for the active network, or {@code null} if none is 1166 * active 1167 */ 1168 @Override 1169 public NetworkInfo getActiveNetworkInfo() { 1170 enforceAccessPermission(); 1171 final int uid = Binder.getCallingUid(); 1172 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1173 filterNetworkStateForUid(state, uid, false); 1174 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1175 return state.networkInfo; 1176 } 1177 1178 @Override 1179 public Network getActiveNetwork() { 1180 enforceAccessPermission(); 1181 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1182 } 1183 1184 @Override 1185 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1186 enforceConnectivityInternalPermission(); 1187 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1188 } 1189 1190 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1191 final int user = UserHandle.getUserId(uid); 1192 int vpnNetId = NETID_UNSET; 1193 synchronized (mVpns) { 1194 final Vpn vpn = mVpns.get(user); 1195 // TODO : now that capabilities contain the UID, the appliesToUid test should 1196 // be removed as the satisfying test below should be enough. 1197 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1198 } 1199 NetworkAgentInfo nai; 1200 if (vpnNetId != NETID_UNSET) { 1201 nai = getNetworkAgentInfoForNetId(vpnNetId); 1202 if (nai != null) { 1203 final NetworkCapabilities requiredCaps = 1204 createDefaultNetworkCapabilitiesForUid(uid); 1205 if (requiredCaps.satisfiedByNetworkCapabilities(nai.networkCapabilities)) { 1206 return nai.network; 1207 } 1208 } 1209 } 1210 nai = getDefaultNetwork(); 1211 if (nai != null 1212 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1213 nai = null; 1214 } 1215 return nai != null ? nai.network : null; 1216 } 1217 1218 // Public because it's used by mLockdownTracker. 1219 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1220 enforceAccessPermission(); 1221 final int uid = Binder.getCallingUid(); 1222 NetworkState state = getUnfilteredActiveNetworkState(uid); 1223 return state.networkInfo; 1224 } 1225 1226 @Override 1227 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1228 enforceConnectivityInternalPermission(); 1229 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1230 filterNetworkStateForUid(state, uid, ignoreBlocked); 1231 return state.networkInfo; 1232 } 1233 1234 @Override 1235 public NetworkInfo getNetworkInfo(int networkType) { 1236 enforceAccessPermission(); 1237 final int uid = Binder.getCallingUid(); 1238 if (getVpnUnderlyingNetworks(uid) != null) { 1239 // A VPN is active, so we may need to return one of its underlying networks. This 1240 // information is not available in LegacyTypeTracker, so we have to get it from 1241 // getUnfilteredActiveNetworkState. 1242 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1243 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1244 filterNetworkStateForUid(state, uid, false); 1245 return state.networkInfo; 1246 } 1247 } 1248 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1249 return state.networkInfo; 1250 } 1251 1252 @Override 1253 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1254 enforceAccessPermission(); 1255 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1256 if (nai != null) { 1257 final NetworkState state = nai.getNetworkState(); 1258 filterNetworkStateForUid(state, uid, ignoreBlocked); 1259 return state.networkInfo; 1260 } else { 1261 return null; 1262 } 1263 } 1264 1265 @Override 1266 public NetworkInfo[] getAllNetworkInfo() { 1267 enforceAccessPermission(); 1268 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1269 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1270 networkType++) { 1271 NetworkInfo info = getNetworkInfo(networkType); 1272 if (info != null) { 1273 result.add(info); 1274 } 1275 } 1276 return result.toArray(new NetworkInfo[result.size()]); 1277 } 1278 1279 @Override 1280 public Network getNetworkForType(int networkType) { 1281 enforceAccessPermission(); 1282 final int uid = Binder.getCallingUid(); 1283 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1284 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1285 return state.network; 1286 } 1287 return null; 1288 } 1289 1290 @Override 1291 public Network[] getAllNetworks() { 1292 enforceAccessPermission(); 1293 synchronized (mNetworkForNetId) { 1294 final Network[] result = new Network[mNetworkForNetId.size()]; 1295 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1296 result[i] = mNetworkForNetId.valueAt(i).network; 1297 } 1298 return result; 1299 } 1300 } 1301 1302 @Override 1303 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1304 // The basic principle is: if an app's traffic could possibly go over a 1305 // network, without the app doing anything multinetwork-specific, 1306 // (hence, by "default"), then include that network's capabilities in 1307 // the array. 1308 // 1309 // In the normal case, app traffic only goes over the system's default 1310 // network connection, so that's the only network returned. 1311 // 1312 // With a VPN in force, some app traffic may go into the VPN, and thus 1313 // over whatever underlying networks the VPN specifies, while other app 1314 // traffic may go over the system default network (e.g.: a split-tunnel 1315 // VPN, or an app disallowed by the VPN), so the set of networks 1316 // returned includes the VPN's underlying networks and the system 1317 // default. 1318 enforceAccessPermission(); 1319 1320 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1321 1322 NetworkAgentInfo nai = getDefaultNetwork(); 1323 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1324 if (nc != null) { 1325 result.put(nai.network, nc); 1326 } 1327 1328 synchronized (mVpns) { 1329 if (!mLockdownEnabled) { 1330 Vpn vpn = mVpns.get(userId); 1331 if (vpn != null) { 1332 Network[] networks = vpn.getUnderlyingNetworks(); 1333 if (networks != null) { 1334 for (Network network : networks) { 1335 nai = getNetworkAgentInfoForNetwork(network); 1336 nc = getNetworkCapabilitiesInternal(nai); 1337 if (nc != null) { 1338 result.put(network, nc); 1339 } 1340 } 1341 } 1342 } 1343 } 1344 } 1345 1346 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1347 out = result.values().toArray(out); 1348 return out; 1349 } 1350 1351 @Override 1352 public boolean isNetworkSupported(int networkType) { 1353 enforceAccessPermission(); 1354 return mLegacyTypeTracker.isTypeSupported(networkType); 1355 } 1356 1357 /** 1358 * Return LinkProperties for the active (i.e., connected) default 1359 * network interface. It is assumed that at most one default network 1360 * is active at a time. If more than one is active, it is indeterminate 1361 * which will be returned. 1362 * @return the ip properties for the active network, or {@code null} if 1363 * none is active 1364 */ 1365 @Override 1366 public LinkProperties getActiveLinkProperties() { 1367 enforceAccessPermission(); 1368 final int uid = Binder.getCallingUid(); 1369 NetworkState state = getUnfilteredActiveNetworkState(uid); 1370 return state.linkProperties; 1371 } 1372 1373 @Override 1374 public LinkProperties getLinkPropertiesForType(int networkType) { 1375 enforceAccessPermission(); 1376 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1377 if (nai != null) { 1378 synchronized (nai) { 1379 return new LinkProperties(nai.linkProperties); 1380 } 1381 } 1382 return null; 1383 } 1384 1385 // TODO - this should be ALL networks 1386 @Override 1387 public LinkProperties getLinkProperties(Network network) { 1388 enforceAccessPermission(); 1389 return getLinkProperties(getNetworkAgentInfoForNetwork(network)); 1390 } 1391 1392 private LinkProperties getLinkProperties(NetworkAgentInfo nai) { 1393 if (nai == null) { 1394 return null; 1395 } 1396 synchronized (nai) { 1397 return new LinkProperties(nai.linkProperties); 1398 } 1399 } 1400 1401 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1402 if (nai != null) { 1403 synchronized (nai) { 1404 if (nai.networkCapabilities != null) { 1405 return networkCapabilitiesRestrictedForCallerPermissions( 1406 nai.networkCapabilities, 1407 Binder.getCallingPid(), Binder.getCallingUid()); 1408 } 1409 } 1410 } 1411 return null; 1412 } 1413 1414 @Override 1415 public NetworkCapabilities getNetworkCapabilities(Network network) { 1416 enforceAccessPermission(); 1417 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1418 } 1419 1420 private NetworkCapabilities networkCapabilitiesRestrictedForCallerPermissions( 1421 NetworkCapabilities nc, int callerPid, int callerUid) { 1422 final NetworkCapabilities newNc = new NetworkCapabilities(nc); 1423 if (!checkSettingsPermission(callerPid, callerUid)) { 1424 newNc.setUids(null); 1425 newNc.setSSID(null); 1426 } 1427 return newNc; 1428 } 1429 1430 private void restrictRequestUidsForCaller(NetworkCapabilities nc) { 1431 if (!checkSettingsPermission()) { 1432 nc.setSingleUid(Binder.getCallingUid()); 1433 } 1434 } 1435 1436 private void restrictBackgroundRequestForCaller(NetworkCapabilities nc) { 1437 if (!mPermissionMonitor.hasUseBackgroundNetworksPermission(Binder.getCallingUid())) { 1438 nc.addCapability(NET_CAPABILITY_FOREGROUND); 1439 } 1440 } 1441 1442 @Override 1443 public NetworkState[] getAllNetworkState() { 1444 // Require internal since we're handing out IMSI details 1445 enforceConnectivityInternalPermission(); 1446 1447 final ArrayList<NetworkState> result = Lists.newArrayList(); 1448 for (Network network : getAllNetworks()) { 1449 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1450 if (nai != null) { 1451 // TODO (b/73321673) : NetworkState contains a copy of the 1452 // NetworkCapabilities, which may contain UIDs of apps to which the 1453 // network applies. Should the UIDs be cleared so as not to leak or 1454 // interfere ? 1455 result.add(nai.getNetworkState()); 1456 } 1457 } 1458 return result.toArray(new NetworkState[result.size()]); 1459 } 1460 1461 @Override 1462 @Deprecated 1463 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1464 Log.w(TAG, "Shame on UID " + Binder.getCallingUid() 1465 + " for calling the hidden API getNetworkQuotaInfo(). Shame!"); 1466 return new NetworkQuotaInfo(); 1467 } 1468 1469 @Override 1470 public boolean isActiveNetworkMetered() { 1471 enforceAccessPermission(); 1472 1473 final int uid = Binder.getCallingUid(); 1474 final NetworkCapabilities caps = getUnfilteredActiveNetworkState(uid).networkCapabilities; 1475 if (caps != null) { 1476 return !caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED); 1477 } else { 1478 // Always return the most conservative value 1479 return true; 1480 } 1481 } 1482 1483 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1484 @Override 1485 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1486 int deviceType = Integer.parseInt(label); 1487 sendDataActivityBroadcast(deviceType, active, tsNanos); 1488 } 1489 }; 1490 1491 /** 1492 * Ensure that a network route exists to deliver traffic to the specified 1493 * host via the specified network interface. 1494 * @param networkType the type of the network over which traffic to the 1495 * specified host is to be routed 1496 * @param hostAddress the IP address of the host to which the route is 1497 * desired 1498 * @return {@code true} on success, {@code false} on failure 1499 */ 1500 @Override 1501 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1502 enforceChangePermission(); 1503 if (mProtectedNetworks.contains(networkType)) { 1504 enforceConnectivityInternalPermission(); 1505 } 1506 1507 InetAddress addr; 1508 try { 1509 addr = InetAddress.getByAddress(hostAddress); 1510 } catch (UnknownHostException e) { 1511 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1512 return false; 1513 } 1514 1515 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1516 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1517 return false; 1518 } 1519 1520 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1521 if (nai == null) { 1522 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1523 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1524 } else { 1525 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1526 } 1527 return false; 1528 } 1529 1530 DetailedState netState; 1531 synchronized (nai) { 1532 netState = nai.networkInfo.getDetailedState(); 1533 } 1534 1535 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1536 if (VDBG) { 1537 log("requestRouteToHostAddress on down network " 1538 + "(" + networkType + ") - dropped" 1539 + " netState=" + netState); 1540 } 1541 return false; 1542 } 1543 1544 final int uid = Binder.getCallingUid(); 1545 final long token = Binder.clearCallingIdentity(); 1546 try { 1547 LinkProperties lp; 1548 int netId; 1549 synchronized (nai) { 1550 lp = nai.linkProperties; 1551 netId = nai.network.netId; 1552 } 1553 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1554 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1555 return ok; 1556 } finally { 1557 Binder.restoreCallingIdentity(token); 1558 } 1559 } 1560 1561 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1562 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1563 if (bestRoute == null) { 1564 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1565 } else { 1566 String iface = bestRoute.getInterface(); 1567 if (bestRoute.getGateway().equals(addr)) { 1568 // if there is no better route, add the implied hostroute for our gateway 1569 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1570 } else { 1571 // if we will connect to this through another route, add a direct route 1572 // to it's gateway 1573 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1574 } 1575 } 1576 if (DBG) log("Adding legacy route " + bestRoute + 1577 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1578 try { 1579 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1580 } catch (Exception e) { 1581 // never crash - catch them all 1582 if (DBG) loge("Exception trying to add a route: " + e); 1583 return false; 1584 } 1585 return true; 1586 } 1587 1588 @VisibleForTesting 1589 protected final INetdEventCallback mNetdEventCallback = new BaseNetdEventCallback() { 1590 @Override 1591 public void onPrivateDnsValidationEvent(int netId, String ipAddress, 1592 String hostname, boolean validated) { 1593 try { 1594 mHandler.sendMessage(mHandler.obtainMessage( 1595 EVENT_PRIVATE_DNS_VALIDATION_UPDATE, 1596 new PrivateDnsValidationUpdate(netId, 1597 InetAddress.parseNumericAddress(ipAddress), 1598 hostname, validated))); 1599 } catch (IllegalArgumentException e) { 1600 loge("Error parsing ip address in validation event"); 1601 } 1602 } 1603 }; 1604 1605 @VisibleForTesting 1606 protected void registerNetdEventCallback() { 1607 mIpConnectivityMetrics = 1608 (IIpConnectivityMetrics) IIpConnectivityMetrics.Stub.asInterface( 1609 ServiceManager.getService(IpConnectivityLog.SERVICE_NAME)); 1610 if (mIpConnectivityMetrics == null) { 1611 Slog.wtf(TAG, "Missing IIpConnectivityMetrics"); 1612 } 1613 1614 try { 1615 mIpConnectivityMetrics.addNetdEventCallback( 1616 INetdEventCallback.CALLBACK_CALLER_CONNECTIVITY_SERVICE, 1617 mNetdEventCallback); 1618 } catch (Exception e) { 1619 loge("Error registering netd callback: " + e); 1620 } 1621 } 1622 1623 private final INetworkPolicyListener mPolicyListener = new NetworkPolicyManager.Listener() { 1624 @Override 1625 public void onUidRulesChanged(int uid, int uidRules) { 1626 // TODO: notify UID when it has requested targeted updates 1627 } 1628 @Override 1629 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1630 // TODO: relocate this specific callback in Tethering. 1631 if (restrictBackground) { 1632 log("onRestrictBackgroundChanged(true): disabling tethering"); 1633 mTethering.untetherAll(); 1634 } 1635 } 1636 }; 1637 1638 /** 1639 * Require that the caller is either in the same user or has appropriate permission to interact 1640 * across users. 1641 * 1642 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1643 */ 1644 private void enforceCrossUserPermission(int userId) { 1645 if (userId == UserHandle.getCallingUserId()) { 1646 // Not a cross-user call. 1647 return; 1648 } 1649 mContext.enforceCallingOrSelfPermission( 1650 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1651 "ConnectivityService"); 1652 } 1653 1654 private void enforceInternetPermission() { 1655 mContext.enforceCallingOrSelfPermission( 1656 android.Manifest.permission.INTERNET, 1657 "ConnectivityService"); 1658 } 1659 1660 private void enforceAccessPermission() { 1661 mContext.enforceCallingOrSelfPermission( 1662 android.Manifest.permission.ACCESS_NETWORK_STATE, 1663 "ConnectivityService"); 1664 } 1665 1666 private void enforceChangePermission() { 1667 ConnectivityManager.enforceChangePermission(mContext); 1668 } 1669 1670 private void enforceSettingsPermission() { 1671 mContext.enforceCallingOrSelfPermission( 1672 android.Manifest.permission.NETWORK_SETTINGS, 1673 "ConnectivityService"); 1674 } 1675 1676 private boolean checkSettingsPermission() { 1677 return PERMISSION_GRANTED == mContext.checkCallingOrSelfPermission( 1678 android.Manifest.permission.NETWORK_SETTINGS); 1679 } 1680 1681 private boolean checkSettingsPermission(int pid, int uid) { 1682 return PERMISSION_GRANTED == mContext.checkPermission( 1683 android.Manifest.permission.NETWORK_SETTINGS, pid, uid); 1684 } 1685 1686 private void enforceTetherAccessPermission() { 1687 mContext.enforceCallingOrSelfPermission( 1688 android.Manifest.permission.ACCESS_NETWORK_STATE, 1689 "ConnectivityService"); 1690 } 1691 1692 private void enforceConnectivityInternalPermission() { 1693 mContext.enforceCallingOrSelfPermission( 1694 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1695 "ConnectivityService"); 1696 } 1697 1698 private void enforceConnectivityRestrictedNetworksPermission() { 1699 try { 1700 mContext.enforceCallingOrSelfPermission( 1701 android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, 1702 "ConnectivityService"); 1703 return; 1704 } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } 1705 enforceConnectivityInternalPermission(); 1706 } 1707 1708 private void enforceKeepalivePermission() { 1709 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1710 } 1711 1712 // Public because it's used by mLockdownTracker. 1713 public void sendConnectedBroadcast(NetworkInfo info) { 1714 enforceConnectivityInternalPermission(); 1715 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1716 } 1717 1718 private void sendInetConditionBroadcast(NetworkInfo info) { 1719 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1720 } 1721 1722 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1723 synchronized (mVpns) { 1724 if (mLockdownTracker != null) { 1725 info = new NetworkInfo(info); 1726 mLockdownTracker.augmentNetworkInfo(info); 1727 } 1728 } 1729 1730 Intent intent = new Intent(bcastType); 1731 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1732 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1733 if (info.isFailover()) { 1734 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1735 info.setFailover(false); 1736 } 1737 if (info.getReason() != null) { 1738 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1739 } 1740 if (info.getExtraInfo() != null) { 1741 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1742 info.getExtraInfo()); 1743 } 1744 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1745 return intent; 1746 } 1747 1748 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1749 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1750 } 1751 1752 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1753 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1754 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1755 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1756 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1757 final long ident = Binder.clearCallingIdentity(); 1758 try { 1759 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1760 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1761 } finally { 1762 Binder.restoreCallingIdentity(ident); 1763 } 1764 } 1765 1766 private void sendStickyBroadcast(Intent intent) { 1767 synchronized (this) { 1768 if (!mSystemReady) { 1769 mInitialBroadcast = new Intent(intent); 1770 } 1771 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1772 if (VDBG) { 1773 log("sendStickyBroadcast: action=" + intent.getAction()); 1774 } 1775 1776 Bundle options = null; 1777 final long ident = Binder.clearCallingIdentity(); 1778 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1779 final NetworkInfo ni = intent.getParcelableExtra( 1780 ConnectivityManager.EXTRA_NETWORK_INFO); 1781 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1782 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1783 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1784 } else { 1785 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1786 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1787 options = opts.toBundle(); 1788 } 1789 final IBatteryStats bs = BatteryStatsService.getService(); 1790 try { 1791 bs.noteConnectivityChanged(intent.getIntExtra( 1792 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1793 ni != null ? ni.getState().toString() : "?"); 1794 } catch (RemoteException e) { 1795 } 1796 intent.addFlags(Intent.FLAG_RECEIVER_VISIBLE_TO_INSTANT_APPS); 1797 } 1798 try { 1799 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1800 } finally { 1801 Binder.restoreCallingIdentity(ident); 1802 } 1803 } 1804 } 1805 1806 void systemReady() { 1807 loadGlobalProxy(); 1808 registerNetdEventCallback(); 1809 1810 synchronized (this) { 1811 mSystemReady = true; 1812 if (mInitialBroadcast != null) { 1813 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1814 mInitialBroadcast = null; 1815 } 1816 } 1817 // load the global proxy at startup 1818 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1819 1820 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1821 // for user to unlock device too. 1822 updateLockdownVpn(); 1823 1824 // Configure whether mobile data is always on. 1825 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1826 1827 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1828 1829 mPermissionMonitor.startMonitoring(); 1830 } 1831 1832 /** 1833 * Setup data activity tracking for the given network. 1834 * 1835 * Every {@code setupDataActivityTracking} should be paired with a 1836 * {@link #removeDataActivityTracking} for cleanup. 1837 */ 1838 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1839 final String iface = networkAgent.linkProperties.getInterfaceName(); 1840 1841 final int timeout; 1842 int type = ConnectivityManager.TYPE_NONE; 1843 1844 if (networkAgent.networkCapabilities.hasTransport( 1845 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1846 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1847 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1848 10); 1849 type = ConnectivityManager.TYPE_MOBILE; 1850 } else if (networkAgent.networkCapabilities.hasTransport( 1851 NetworkCapabilities.TRANSPORT_WIFI)) { 1852 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1853 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1854 15); 1855 type = ConnectivityManager.TYPE_WIFI; 1856 } else { 1857 // do not track any other networks 1858 timeout = 0; 1859 } 1860 1861 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1862 try { 1863 mNetd.addIdleTimer(iface, timeout, type); 1864 } catch (Exception e) { 1865 // You shall not crash! 1866 loge("Exception in setupDataActivityTracking " + e); 1867 } 1868 } 1869 } 1870 1871 /** 1872 * Remove data activity tracking when network disconnects. 1873 */ 1874 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1875 final String iface = networkAgent.linkProperties.getInterfaceName(); 1876 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1877 1878 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1879 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1880 try { 1881 // the call fails silently if no idletimer setup for this interface 1882 mNetd.removeIdleTimer(iface); 1883 } catch (Exception e) { 1884 loge("Exception in removeDataActivityTracking " + e); 1885 } 1886 } 1887 } 1888 1889 /** 1890 * Reads the network specific MTU size from reources. 1891 * and set it on it's iface. 1892 */ 1893 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1894 final String iface = newLp.getInterfaceName(); 1895 final int mtu = newLp.getMtu(); 1896 if (oldLp == null && mtu == 0) { 1897 // Silently ignore unset MTU value. 1898 return; 1899 } 1900 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1901 if (VDBG) log("identical MTU - not setting"); 1902 return; 1903 } 1904 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1905 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1906 return; 1907 } 1908 1909 // Cannot set MTU without interface name 1910 if (TextUtils.isEmpty(iface)) { 1911 loge("Setting MTU size with null iface."); 1912 return; 1913 } 1914 1915 try { 1916 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1917 mNetd.setMtu(iface, mtu); 1918 } catch (Exception e) { 1919 Slog.e(TAG, "exception in setMtu()" + e); 1920 } 1921 } 1922 1923 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1924 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1925 1926 // Overridden for testing purposes to avoid writing to SystemProperties. 1927 @VisibleForTesting 1928 protected MockableSystemProperties getSystemProperties() { 1929 return new MockableSystemProperties(); 1930 } 1931 1932 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1933 if (isDefaultNetwork(nai) == false) { 1934 return; 1935 } 1936 1937 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1938 String[] values = null; 1939 if (tcpBufferSizes != null) { 1940 values = tcpBufferSizes.split(","); 1941 } 1942 1943 if (values == null || values.length != 6) { 1944 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1945 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1946 values = tcpBufferSizes.split(","); 1947 } 1948 1949 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1950 1951 try { 1952 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1953 1954 final String prefix = "/sys/kernel/ipv4/tcp_"; 1955 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1956 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1957 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1958 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1959 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1960 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1961 mCurrentTcpBufferSizes = tcpBufferSizes; 1962 } catch (IOException e) { 1963 loge("Can't set TCP buffer sizes:" + e); 1964 } 1965 1966 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1967 Settings.Global.TCP_DEFAULT_INIT_RWND, 1968 mSystemProperties.getInt("net.tcp.default_init_rwnd", 0)); 1969 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1970 if (rwndValue != 0) { 1971 mSystemProperties.set(sysctlKey, rwndValue.toString()); 1972 } 1973 } 1974 1975 @Override 1976 public int getRestoreDefaultNetworkDelay(int networkType) { 1977 String restoreDefaultNetworkDelayStr = mSystemProperties.get( 1978 NETWORK_RESTORE_DELAY_PROP_NAME); 1979 if(restoreDefaultNetworkDelayStr != null && 1980 restoreDefaultNetworkDelayStr.length() != 0) { 1981 try { 1982 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1983 } catch (NumberFormatException e) { 1984 } 1985 } 1986 // if the system property isn't set, use the value for the apn type 1987 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1988 1989 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1990 (mNetConfigs[networkType] != null)) { 1991 ret = mNetConfigs[networkType].restoreTime; 1992 } 1993 return ret; 1994 } 1995 1996 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1997 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1998 final long DIAG_TIME_MS = 5000; 1999 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2000 // Start gathering diagnostic information. 2001 netDiags.add(new NetworkDiagnostics( 2002 nai.network, 2003 new LinkProperties(nai.linkProperties), // Must be a copy. 2004 DIAG_TIME_MS)); 2005 } 2006 2007 for (NetworkDiagnostics netDiag : netDiags) { 2008 pw.println(); 2009 netDiag.waitForMeasurements(); 2010 netDiag.dump(pw); 2011 } 2012 } 2013 2014 @Override 2015 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 2016 PriorityDump.dump(mPriorityDumper, fd, writer, args); 2017 } 2018 2019 private void doDump(FileDescriptor fd, PrintWriter writer, String[] args, boolean asProto) { 2020 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 2021 if (!DumpUtils.checkDumpPermission(mContext, TAG, pw)) return; 2022 if (asProto) return; 2023 2024 if (ArrayUtils.contains(args, DIAG_ARG)) { 2025 dumpNetworkDiagnostics(pw); 2026 return; 2027 } else if (ArrayUtils.contains(args, TETHERING_ARG)) { 2028 mTethering.dump(fd, pw, args); 2029 return; 2030 } 2031 2032 pw.print("NetworkFactories for:"); 2033 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2034 pw.print(" " + nfi.name); 2035 } 2036 pw.println(); 2037 pw.println(); 2038 2039 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 2040 pw.print("Active default network: "); 2041 if (defaultNai == null) { 2042 pw.println("none"); 2043 } else { 2044 pw.println(defaultNai.network.netId); 2045 } 2046 pw.println(); 2047 2048 pw.println("Current Networks:"); 2049 pw.increaseIndent(); 2050 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2051 pw.println(nai.toString()); 2052 pw.increaseIndent(); 2053 pw.println(String.format( 2054 "Requests: REQUEST:%d LISTEN:%d BACKGROUND_REQUEST:%d total:%d", 2055 nai.numForegroundNetworkRequests(), 2056 nai.numNetworkRequests() - nai.numRequestNetworkRequests(), 2057 nai.numBackgroundNetworkRequests(), 2058 nai.numNetworkRequests())); 2059 pw.increaseIndent(); 2060 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2061 pw.println(nai.requestAt(i).toString()); 2062 } 2063 pw.decreaseIndent(); 2064 pw.println("Lingered:"); 2065 pw.increaseIndent(); 2066 nai.dumpLingerTimers(pw); 2067 pw.decreaseIndent(); 2068 pw.decreaseIndent(); 2069 } 2070 pw.decreaseIndent(); 2071 pw.println(); 2072 2073 pw.println("Network Requests:"); 2074 pw.increaseIndent(); 2075 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2076 pw.println(nri.toString()); 2077 } 2078 pw.println(); 2079 pw.decreaseIndent(); 2080 2081 mLegacyTypeTracker.dump(pw); 2082 2083 pw.println(); 2084 mTethering.dump(fd, pw, args); 2085 2086 pw.println(); 2087 mKeepaliveTracker.dump(pw); 2088 2089 pw.println(); 2090 dumpAvoidBadWifiSettings(pw); 2091 2092 pw.println(); 2093 mMultipathPolicyTracker.dump(pw); 2094 2095 if (ArrayUtils.contains(args, SHORT_ARG) == false) { 2096 pw.println(); 2097 synchronized (mValidationLogs) { 2098 pw.println("mValidationLogs (most recent first):"); 2099 for (ValidationLog p : mValidationLogs) { 2100 pw.println(p.mNetwork + " - " + p.mName); 2101 pw.increaseIndent(); 2102 p.mLog.dump(fd, pw, args); 2103 pw.decreaseIndent(); 2104 } 2105 } 2106 2107 pw.println(); 2108 pw.println("mNetworkRequestInfoLogs (most recent first):"); 2109 pw.increaseIndent(); 2110 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 2111 pw.decreaseIndent(); 2112 2113 pw.println(); 2114 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 2115 pw.increaseIndent(); 2116 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 2117 pw.decreaseIndent(); 2118 2119 pw.println(); 2120 pw.println("NetTransition WakeLock activity (most recent first):"); 2121 pw.increaseIndent(); 2122 pw.println("total acquisitions: " + mTotalWakelockAcquisitions); 2123 pw.println("total releases: " + mTotalWakelockReleases); 2124 pw.println("cumulative duration: " + (mTotalWakelockDurationMs / 1000) + "s"); 2125 pw.println("longest duration: " + (mMaxWakelockDurationMs / 1000) + "s"); 2126 if (mTotalWakelockAcquisitions > mTotalWakelockReleases) { 2127 long duration = SystemClock.elapsedRealtime() - mLastWakeLockAcquireTimestamp; 2128 pw.println("currently holding WakeLock for: " + (duration / 1000) + "s"); 2129 } 2130 mWakelockLogs.reverseDump(fd, pw, args); 2131 pw.decreaseIndent(); 2132 } 2133 } 2134 2135 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 2136 if (nai.network == null) return false; 2137 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 2138 if (officialNai != null && officialNai.equals(nai)) return true; 2139 if (officialNai != null || VDBG) { 2140 loge(eventName(what) + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 2141 " - " + nai); 2142 } 2143 return false; 2144 } 2145 2146 // must be stateless - things change under us. 2147 private class NetworkStateTrackerHandler extends Handler { 2148 public NetworkStateTrackerHandler(Looper looper) { 2149 super(looper); 2150 } 2151 2152 private boolean maybeHandleAsyncChannelMessage(Message msg) { 2153 switch (msg.what) { 2154 default: 2155 return false; 2156 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2157 handleAsyncChannelHalfConnect(msg); 2158 break; 2159 } 2160 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2161 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2162 if (nai != null) nai.asyncChannel.disconnect(); 2163 break; 2164 } 2165 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2166 handleAsyncChannelDisconnected(msg); 2167 break; 2168 } 2169 } 2170 return true; 2171 } 2172 2173 private void maybeHandleNetworkAgentMessage(Message msg) { 2174 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2175 if (nai == null) { 2176 if (VDBG) { 2177 log(String.format("%s from unknown NetworkAgent", eventName(msg.what))); 2178 } 2179 return; 2180 } 2181 2182 switch (msg.what) { 2183 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2184 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2185 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2186 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED) || 2187 networkCapabilities.hasCapability(NET_CAPABILITY_FOREGROUND)) { 2188 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2189 } 2190 updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities); 2191 break; 2192 } 2193 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2194 handleUpdateLinkProperties(nai, (LinkProperties) msg.obj); 2195 break; 2196 } 2197 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2198 NetworkInfo info = (NetworkInfo) msg.obj; 2199 updateNetworkInfo(nai, info); 2200 break; 2201 } 2202 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2203 Integer score = (Integer) msg.obj; 2204 if (score != null) updateNetworkScore(nai, score.intValue()); 2205 break; 2206 } 2207 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2208 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2209 loge("ERROR: already-connected network explicitly selected."); 2210 } 2211 nai.networkMisc.explicitlySelected = true; 2212 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2213 break; 2214 } 2215 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2216 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2217 break; 2218 } 2219 } 2220 } 2221 2222 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2223 switch (msg.what) { 2224 default: 2225 return false; 2226 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2227 final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(msg.arg2); 2228 if (nai == null) break; 2229 2230 final boolean valid = (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2231 final boolean wasValidated = nai.lastValidated; 2232 final boolean wasDefault = isDefaultNetwork(nai); 2233 2234 final String redirectUrl = (msg.obj instanceof String) ? (String) msg.obj : ""; 2235 2236 if (DBG) { 2237 final String logMsg = !TextUtils.isEmpty(redirectUrl) 2238 ? " with redirect to " + redirectUrl 2239 : ""; 2240 log(nai.name() + " validation " + (valid ? "passed" : "failed") + logMsg); 2241 } 2242 if (valid != nai.lastValidated) { 2243 if (wasDefault) { 2244 metricsLogger().defaultNetworkMetrics().logDefaultNetworkValidity( 2245 SystemClock.elapsedRealtime(), valid); 2246 } 2247 final int oldScore = nai.getCurrentScore(); 2248 nai.lastValidated = valid; 2249 nai.everValidated |= valid; 2250 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2251 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2252 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2253 } 2254 updateInetCondition(nai); 2255 // Let the NetworkAgent know the state of its network 2256 Bundle redirectUrlBundle = new Bundle(); 2257 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, redirectUrl); 2258 nai.asyncChannel.sendMessage( 2259 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2260 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2261 0, redirectUrlBundle); 2262 if (wasValidated && !nai.lastValidated) { 2263 handleNetworkUnvalidated(nai); 2264 } 2265 break; 2266 } 2267 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2268 final int netId = msg.arg2; 2269 final boolean visible = toBool(msg.arg1); 2270 final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(netId); 2271 // If captive portal status has changed, update capabilities or disconnect. 2272 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2273 final int oldScore = nai.getCurrentScore(); 2274 nai.lastCaptivePortalDetected = visible; 2275 nai.everCaptivePortalDetected |= visible; 2276 if (nai.lastCaptivePortalDetected && 2277 Settings.Global.CAPTIVE_PORTAL_MODE_AVOID == getCaptivePortalMode()) { 2278 if (DBG) log("Avoiding captive portal network: " + nai.name()); 2279 nai.asyncChannel.sendMessage( 2280 NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2281 teardownUnneededNetwork(nai); 2282 break; 2283 } 2284 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2285 } 2286 if (!visible) { 2287 mNotifier.clearNotification(netId); 2288 } else { 2289 if (nai == null) { 2290 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2291 break; 2292 } 2293 if (!nai.networkMisc.provisioningNotificationDisabled) { 2294 mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null, 2295 (PendingIntent) msg.obj, nai.networkMisc.explicitlySelected); 2296 } 2297 } 2298 break; 2299 } 2300 case NetworkMonitor.EVENT_PRIVATE_DNS_CONFIG_RESOLVED: { 2301 final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(msg.arg2); 2302 if (nai == null) break; 2303 2304 updatePrivateDns(nai, (PrivateDnsConfig) msg.obj); 2305 break; 2306 } 2307 } 2308 return true; 2309 } 2310 2311 private int getCaptivePortalMode() { 2312 return Settings.Global.getInt(mContext.getContentResolver(), 2313 Settings.Global.CAPTIVE_PORTAL_MODE, 2314 Settings.Global.CAPTIVE_PORTAL_MODE_PROMPT); 2315 } 2316 2317 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2318 switch (msg.what) { 2319 default: 2320 return false; 2321 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2322 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2323 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2324 handleLingerComplete(nai); 2325 } 2326 break; 2327 } 2328 } 2329 return true; 2330 } 2331 2332 @Override 2333 public void handleMessage(Message msg) { 2334 if (!maybeHandleAsyncChannelMessage(msg) && 2335 !maybeHandleNetworkMonitorMessage(msg) && 2336 !maybeHandleNetworkAgentInfoMessage(msg)) { 2337 maybeHandleNetworkAgentMessage(msg); 2338 } 2339 } 2340 } 2341 2342 private boolean networkRequiresValidation(NetworkAgentInfo nai) { 2343 return NetworkMonitor.isValidationRequired( 2344 mDefaultRequest.networkCapabilities, nai.networkCapabilities); 2345 } 2346 2347 private void handlePrivateDnsSettingsChanged() { 2348 final PrivateDnsConfig cfg = mDnsManager.getPrivateDnsConfig(); 2349 2350 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2351 handlePerNetworkPrivateDnsConfig(nai, cfg); 2352 if (networkRequiresValidation(nai)) { 2353 handleUpdateLinkProperties(nai, new LinkProperties(nai.linkProperties)); 2354 } 2355 } 2356 } 2357 2358 private void handlePerNetworkPrivateDnsConfig(NetworkAgentInfo nai, PrivateDnsConfig cfg) { 2359 // Private DNS only ever applies to networks that might provide 2360 // Internet access and therefore also require validation. 2361 if (!networkRequiresValidation(nai)) return; 2362 2363 // Notify the NetworkMonitor thread in case it needs to cancel or 2364 // schedule DNS resolutions. If a DNS resolution is required the 2365 // result will be sent back to us. 2366 nai.networkMonitor.notifyPrivateDnsSettingsChanged(cfg); 2367 2368 // With Private DNS bypass support, we can proceed to update the 2369 // Private DNS config immediately, even if we're in strict mode 2370 // and have not yet resolved the provider name into a set of IPs. 2371 updatePrivateDns(nai, cfg); 2372 } 2373 2374 private void updatePrivateDns(NetworkAgentInfo nai, PrivateDnsConfig newCfg) { 2375 mDnsManager.updatePrivateDns(nai.network, newCfg); 2376 updateDnses(nai.linkProperties, null, nai.network.netId); 2377 } 2378 2379 private void handlePrivateDnsValidationUpdate(PrivateDnsValidationUpdate update) { 2380 NetworkAgentInfo nai = getNetworkAgentInfoForNetId(update.netId); 2381 if (nai == null) { 2382 return; 2383 } 2384 mDnsManager.updatePrivateDnsValidation(update); 2385 handleUpdateLinkProperties(nai, new LinkProperties(nai.linkProperties)); 2386 } 2387 2388 private void updateLingerState(NetworkAgentInfo nai, long now) { 2389 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2390 // 2. If the network was lingering and there are now requests, unlinger it. 2391 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2392 // one lingered request, start lingering. 2393 nai.updateLingerTimer(); 2394 if (nai.isLingering() && nai.numForegroundNetworkRequests() > 0) { 2395 if (DBG) log("Unlingering " + nai.name()); 2396 nai.unlinger(); 2397 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2398 } else if (unneeded(nai, UnneededFor.LINGER) && nai.getLingerExpiry() > 0) { 2399 int lingerTime = (int) (nai.getLingerExpiry() - now); 2400 if (DBG) log("Lingering " + nai.name() + " for " + lingerTime + "ms"); 2401 nai.linger(); 2402 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2403 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2404 } 2405 } 2406 2407 private void handleAsyncChannelHalfConnect(Message msg) { 2408 AsyncChannel ac = (AsyncChannel) msg.obj; 2409 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2410 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2411 if (VDBG) log("NetworkFactory connected"); 2412 // A network factory has connected. Send it all current NetworkRequests. 2413 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2414 if (nri.request.isListen()) continue; 2415 NetworkAgentInfo nai = getNetworkForRequest(nri.request.requestId); 2416 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2417 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2418 } 2419 } else { 2420 loge("Error connecting NetworkFactory"); 2421 mNetworkFactoryInfos.remove(msg.obj); 2422 } 2423 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2424 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2425 if (VDBG) log("NetworkAgent connected"); 2426 // A network agent has requested a connection. Establish the connection. 2427 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2428 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2429 } else { 2430 loge("Error connecting NetworkAgent"); 2431 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2432 if (nai != null) { 2433 final boolean wasDefault = isDefaultNetwork(nai); 2434 synchronized (mNetworkForNetId) { 2435 mNetworkForNetId.remove(nai.network.netId); 2436 mNetIdInUse.delete(nai.network.netId); 2437 } 2438 // Just in case. 2439 mLegacyTypeTracker.remove(nai, wasDefault); 2440 } 2441 } 2442 } 2443 } 2444 2445 // This is a no-op if it's called with a message designating a network that has 2446 // already been destroyed, because its reference will not be found in the relevant 2447 // maps. 2448 private void handleAsyncChannelDisconnected(Message msg) { 2449 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2450 if (nai != null) { 2451 disconnectAndDestroyNetwork(nai); 2452 } else { 2453 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2454 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2455 } 2456 } 2457 2458 // Destroys a network, remove references to it from the internal state managed by 2459 // ConnectivityService, free its interfaces and clean up. 2460 // Must be called on the Handler thread. 2461 private void disconnectAndDestroyNetwork(NetworkAgentInfo nai) { 2462 if (DBG) { 2463 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2464 } 2465 // A network agent has disconnected. 2466 // TODO - if we move the logic to the network agent (have them disconnect 2467 // because they lost all their requests or because their score isn't good) 2468 // then they would disconnect organically, report their new state and then 2469 // disconnect the channel. 2470 if (nai.networkInfo.isConnected()) { 2471 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2472 null, null); 2473 } 2474 final boolean wasDefault = isDefaultNetwork(nai); 2475 if (wasDefault) { 2476 mDefaultInetConditionPublished = 0; 2477 // Log default network disconnection before required book-keeping. 2478 // Let rematchAllNetworksAndRequests() below record a new default network event 2479 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2480 // whose timestamps tell how long it takes to recover a default network. 2481 long now = SystemClock.elapsedRealtime(); 2482 metricsLogger().defaultNetworkMetrics().logDefaultNetworkEvent(now, null, nai); 2483 } 2484 notifyIfacesChangedForNetworkStats(); 2485 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2486 // by other networks that are already connected. Perhaps that can be done by 2487 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2488 // of rematchAllNetworksAndRequests 2489 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2490 mKeepaliveTracker.handleStopAllKeepalives(nai, 2491 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2492 for (String iface : nai.linkProperties.getAllInterfaceNames()) { 2493 // Disable wakeup packet monitoring for each interface. 2494 wakeupModifyInterface(iface, nai.networkCapabilities, false); 2495 } 2496 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2497 mNetworkAgentInfos.remove(nai.messenger); 2498 nai.maybeStopClat(); 2499 synchronized (mNetworkForNetId) { 2500 // Remove the NetworkAgent, but don't mark the netId as 2501 // available until we've told netd to delete it below. 2502 mNetworkForNetId.remove(nai.network.netId); 2503 } 2504 // Remove all previously satisfied requests. 2505 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2506 NetworkRequest request = nai.requestAt(i); 2507 NetworkAgentInfo currentNetwork = getNetworkForRequest(request.requestId); 2508 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2509 clearNetworkForRequest(request.requestId); 2510 sendUpdatedScoreToFactories(request, 0); 2511 } 2512 } 2513 nai.clearLingerState(); 2514 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2515 removeDataActivityTracking(nai); 2516 notifyLockdownVpn(nai); 2517 ensureNetworkTransitionWakelock(nai.name()); 2518 } 2519 mLegacyTypeTracker.remove(nai, wasDefault); 2520 if (!nai.networkCapabilities.hasTransport(TRANSPORT_VPN)) { 2521 updateAllVpnsCapabilities(); 2522 } 2523 rematchAllNetworksAndRequests(null, 0); 2524 mLingerMonitor.noteDisconnect(nai); 2525 if (nai.created) { 2526 // Tell netd to clean up the configuration for this network 2527 // (routing rules, DNS, etc). 2528 // This may be slow as it requires a lot of netd shelling out to ip and 2529 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2530 // after we've rematched networks with requests which should make a potential 2531 // fallback network the default or requested a new network from the 2532 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2533 // long time. 2534 try { 2535 mNetd.removeNetwork(nai.network.netId); 2536 } catch (Exception e) { 2537 loge("Exception removing network: " + e); 2538 } 2539 mDnsManager.removeNetwork(nai.network); 2540 } 2541 synchronized (mNetworkForNetId) { 2542 mNetIdInUse.delete(nai.network.netId); 2543 } 2544 } 2545 2546 // If this method proves to be too slow then we can maintain a separate 2547 // pendingIntent => NetworkRequestInfo map. 2548 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2549 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2550 Intent intent = pendingIntent.getIntent(); 2551 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2552 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2553 if (existingPendingIntent != null && 2554 existingPendingIntent.getIntent().filterEquals(intent)) { 2555 return entry.getValue(); 2556 } 2557 } 2558 return null; 2559 } 2560 2561 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2562 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2563 2564 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2565 if (existingRequest != null) { // remove the existing request. 2566 if (DBG) log("Replacing " + existingRequest.request + " with " 2567 + nri.request + " because their intents matched."); 2568 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2569 } 2570 handleRegisterNetworkRequest(nri); 2571 } 2572 2573 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2574 mNetworkRequests.put(nri.request, nri); 2575 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2576 if (nri.request.isListen()) { 2577 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2578 if (nri.request.networkCapabilities.hasSignalStrength() && 2579 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2580 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2581 } 2582 } 2583 } 2584 rematchAllNetworksAndRequests(null, 0); 2585 if (nri.request.isRequest() && getNetworkForRequest(nri.request.requestId) == null) { 2586 sendUpdatedScoreToFactories(nri.request, 0); 2587 } 2588 } 2589 2590 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2591 int callingUid) { 2592 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2593 if (nri != null) { 2594 handleReleaseNetworkRequest(nri.request, callingUid); 2595 } 2596 } 2597 2598 // Determines whether the network is the best (or could become the best, if it validated), for 2599 // none of a particular type of NetworkRequests. The type of NetworkRequests considered depends 2600 // on the value of reason: 2601 // 2602 // - UnneededFor.TEARDOWN: non-listen NetworkRequests. If a network is unneeded for this reason, 2603 // then it should be torn down. 2604 // - UnneededFor.LINGER: foreground NetworkRequests. If a network is unneeded for this reason, 2605 // then it should be lingered. 2606 private boolean unneeded(NetworkAgentInfo nai, UnneededFor reason) { 2607 final int numRequests; 2608 switch (reason) { 2609 case TEARDOWN: 2610 numRequests = nai.numRequestNetworkRequests(); 2611 break; 2612 case LINGER: 2613 numRequests = nai.numForegroundNetworkRequests(); 2614 break; 2615 default: 2616 Slog.wtf(TAG, "Invalid reason. Cannot happen."); 2617 return true; 2618 } 2619 2620 if (!nai.everConnected || nai.isVPN() || nai.isLingering() || numRequests > 0) { 2621 return false; 2622 } 2623 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2624 if (reason == UnneededFor.LINGER && nri.request.isBackgroundRequest()) { 2625 // Background requests don't affect lingering. 2626 continue; 2627 } 2628 2629 // If this Network is already the highest scoring Network for a request, or if 2630 // there is hope for it to become one if it validated, then it is needed. 2631 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2632 (nai.isSatisfyingRequest(nri.request.requestId) || 2633 // Note that this catches two important cases: 2634 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2635 // is currently satisfying the request. This is desirable when 2636 // cellular ends up validating but WiFi does not. 2637 // 2. Unvalidated WiFi will not be reaped when validated cellular 2638 // is currently satisfying the request. This is desirable when 2639 // WiFi ends up validating and out scoring cellular. 2640 getNetworkForRequest(nri.request.requestId).getCurrentScore() < 2641 nai.getCurrentScoreAsValidated())) { 2642 return false; 2643 } 2644 } 2645 return true; 2646 } 2647 2648 private NetworkRequestInfo getNriForAppRequest( 2649 NetworkRequest request, int callingUid, String requestedOperation) { 2650 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2651 2652 if (nri != null) { 2653 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2654 log(String.format("UID %d attempted to %s for unowned request %s", 2655 callingUid, requestedOperation, nri)); 2656 return null; 2657 } 2658 } 2659 2660 return nri; 2661 } 2662 2663 private void handleTimedOutNetworkRequest(final NetworkRequestInfo nri) { 2664 if (mNetworkRequests.get(nri.request) == null) { 2665 return; 2666 } 2667 if (getNetworkForRequest(nri.request.requestId) != null) { 2668 return; 2669 } 2670 if (VDBG || (DBG && nri.request.isRequest())) { 2671 log("releasing " + nri.request + " (timeout)"); 2672 } 2673 handleRemoveNetworkRequest(nri); 2674 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_UNAVAIL, 0); 2675 } 2676 2677 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2678 final NetworkRequestInfo nri = 2679 getNriForAppRequest(request, callingUid, "release NetworkRequest"); 2680 if (nri == null) { 2681 return; 2682 } 2683 if (VDBG || (DBG && nri.request.isRequest())) { 2684 log("releasing " + nri.request + " (release request)"); 2685 } 2686 handleRemoveNetworkRequest(nri); 2687 } 2688 2689 private void handleRemoveNetworkRequest(final NetworkRequestInfo nri) { 2690 nri.unlinkDeathRecipient(); 2691 mNetworkRequests.remove(nri.request); 2692 2693 synchronized (mUidToNetworkRequestCount) { 2694 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2695 if (requests < 1) { 2696 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2697 nri.mUid); 2698 } else if (requests == 1) { 2699 mUidToNetworkRequestCount.removeAt( 2700 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2701 } else { 2702 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2703 } 2704 } 2705 2706 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2707 if (nri.request.isRequest()) { 2708 boolean wasKept = false; 2709 NetworkAgentInfo nai = getNetworkForRequest(nri.request.requestId); 2710 if (nai != null) { 2711 boolean wasBackgroundNetwork = nai.isBackgroundNetwork(); 2712 nai.removeRequest(nri.request.requestId); 2713 if (VDBG) { 2714 log(" Removing from current network " + nai.name() + 2715 ", leaving " + nai.numNetworkRequests() + " requests."); 2716 } 2717 // If there are still lingered requests on this network, don't tear it down, 2718 // but resume lingering instead. 2719 updateLingerState(nai, SystemClock.elapsedRealtime()); 2720 if (unneeded(nai, UnneededFor.TEARDOWN)) { 2721 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2722 teardownUnneededNetwork(nai); 2723 } else { 2724 wasKept = true; 2725 } 2726 clearNetworkForRequest(nri.request.requestId); 2727 if (!wasBackgroundNetwork && nai.isBackgroundNetwork()) { 2728 // Went from foreground to background. 2729 updateCapabilities(nai.getCurrentScore(), nai, nai.networkCapabilities); 2730 } 2731 } 2732 2733 // TODO: remove this code once we know that the Slog.wtf is never hit. 2734 // 2735 // Find all networks that are satisfying this request and remove the request 2736 // from their request lists. 2737 // TODO - it's my understanding that for a request there is only a single 2738 // network satisfying it, so this loop is wasteful 2739 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2740 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2741 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2742 otherNai.name() + ", but mNetworkAgentInfos says " + 2743 (nai != null ? nai.name() : "null")); 2744 } 2745 } 2746 2747 // Maintain the illusion. When this request arrived, we might have pretended 2748 // that a network connected to serve it, even though the network was already 2749 // connected. Now that this request has gone away, we might have to pretend 2750 // that the network disconnected. LegacyTypeTracker will generate that 2751 // phantom disconnect for this type. 2752 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2753 boolean doRemove = true; 2754 if (wasKept) { 2755 // check if any of the remaining requests for this network are for the 2756 // same legacy type - if so, don't remove the nai 2757 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2758 NetworkRequest otherRequest = nai.requestAt(i); 2759 if (otherRequest.legacyType == nri.request.legacyType && 2760 otherRequest.isRequest()) { 2761 if (DBG) log(" still have other legacy request - leaving"); 2762 doRemove = false; 2763 } 2764 } 2765 } 2766 2767 if (doRemove) { 2768 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2769 } 2770 } 2771 2772 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2773 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2774 nri.request); 2775 } 2776 } else { 2777 // listens don't have a singular affectedNetwork. Check all networks to see 2778 // if this listen request applies and remove it. 2779 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2780 nai.removeRequest(nri.request.requestId); 2781 if (nri.request.networkCapabilities.hasSignalStrength() && 2782 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2783 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2784 } 2785 } 2786 } 2787 } 2788 2789 @Override 2790 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2791 enforceConnectivityInternalPermission(); 2792 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2793 encodeBool(accept), encodeBool(always), network)); 2794 } 2795 2796 @Override 2797 public void setAvoidUnvalidated(Network network) { 2798 enforceConnectivityInternalPermission(); 2799 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_AVOID_UNVALIDATED, network)); 2800 } 2801 2802 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2803 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2804 " accept=" + accept + " always=" + always); 2805 2806 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2807 if (nai == null) { 2808 // Nothing to do. 2809 return; 2810 } 2811 2812 if (nai.everValidated) { 2813 // The network validated while the dialog box was up. Take no action. 2814 return; 2815 } 2816 2817 if (!nai.networkMisc.explicitlySelected) { 2818 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2819 } 2820 2821 if (accept != nai.networkMisc.acceptUnvalidated) { 2822 int oldScore = nai.getCurrentScore(); 2823 nai.networkMisc.acceptUnvalidated = accept; 2824 rematchAllNetworksAndRequests(nai, oldScore); 2825 sendUpdatedScoreToFactories(nai); 2826 } 2827 2828 if (always) { 2829 nai.asyncChannel.sendMessage( 2830 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, encodeBool(accept)); 2831 } 2832 2833 if (!accept) { 2834 // Tell the NetworkAgent to not automatically reconnect to the network. 2835 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2836 // Teardown the nework. 2837 teardownUnneededNetwork(nai); 2838 } 2839 2840 } 2841 2842 private void handleSetAvoidUnvalidated(Network network) { 2843 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2844 if (nai == null || nai.lastValidated) { 2845 // Nothing to do. The network either disconnected or revalidated. 2846 return; 2847 } 2848 if (!nai.avoidUnvalidated) { 2849 int oldScore = nai.getCurrentScore(); 2850 nai.avoidUnvalidated = true; 2851 rematchAllNetworksAndRequests(nai, oldScore); 2852 sendUpdatedScoreToFactories(nai); 2853 } 2854 } 2855 2856 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2857 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2858 mHandler.sendMessageDelayed( 2859 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2860 PROMPT_UNVALIDATED_DELAY_MS); 2861 } 2862 2863 @Override 2864 public void startCaptivePortalApp(Network network) { 2865 enforceConnectivityInternalPermission(); 2866 mHandler.post(() -> { 2867 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2868 if (nai == null) return; 2869 if (!nai.networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL)) return; 2870 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_LAUNCH_CAPTIVE_PORTAL_APP); 2871 }); 2872 } 2873 2874 public boolean avoidBadWifi() { 2875 return mMultinetworkPolicyTracker.getAvoidBadWifi(); 2876 } 2877 2878 private void rematchForAvoidBadWifiUpdate() { 2879 rematchAllNetworksAndRequests(null, 0); 2880 for (NetworkAgentInfo nai: mNetworkAgentInfos.values()) { 2881 if (nai.networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) { 2882 sendUpdatedScoreToFactories(nai); 2883 } 2884 } 2885 } 2886 2887 // TODO: Evaluate whether this is of interest to other consumers of 2888 // MultinetworkPolicyTracker and worth moving out of here. 2889 private void dumpAvoidBadWifiSettings(IndentingPrintWriter pw) { 2890 final boolean configRestrict = mMultinetworkPolicyTracker.configRestrictsAvoidBadWifi(); 2891 if (!configRestrict) { 2892 pw.println("Bad Wi-Fi avoidance: unrestricted"); 2893 return; 2894 } 2895 2896 pw.println("Bad Wi-Fi avoidance: " + avoidBadWifi()); 2897 pw.increaseIndent(); 2898 pw.println("Config restrict: " + configRestrict); 2899 2900 final String value = mMultinetworkPolicyTracker.getAvoidBadWifiSetting(); 2901 String description; 2902 // Can't use a switch statement because strings are legal case labels, but null is not. 2903 if ("0".equals(value)) { 2904 description = "get stuck"; 2905 } else if (value == null) { 2906 description = "prompt"; 2907 } else if ("1".equals(value)) { 2908 description = "avoid"; 2909 } else { 2910 description = value + " (?)"; 2911 } 2912 pw.println("User setting: " + description); 2913 pw.println("Network overrides:"); 2914 pw.increaseIndent(); 2915 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2916 if (nai.avoidUnvalidated) { 2917 pw.println(nai.name()); 2918 } 2919 } 2920 pw.decreaseIndent(); 2921 pw.decreaseIndent(); 2922 } 2923 2924 private void showValidationNotification(NetworkAgentInfo nai, NotificationType type) { 2925 final String action; 2926 switch (type) { 2927 case NO_INTERNET: 2928 action = ConnectivityManager.ACTION_PROMPT_UNVALIDATED; 2929 break; 2930 case LOST_INTERNET: 2931 action = ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION; 2932 break; 2933 default: 2934 Slog.wtf(TAG, "Unknown notification type " + type); 2935 return; 2936 } 2937 2938 Intent intent = new Intent(action); 2939 intent.setData(Uri.fromParts("netId", Integer.toString(nai.network.netId), null)); 2940 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2941 intent.setClassName("com.android.settings", 2942 "com.android.settings.wifi.WifiNoInternetDialog"); 2943 2944 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2945 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2946 mNotifier.showNotification(nai.network.netId, type, nai, null, pendingIntent, true); 2947 } 2948 2949 private void handlePromptUnvalidated(Network network) { 2950 if (VDBG) log("handlePromptUnvalidated " + network); 2951 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2952 2953 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2954 // we haven't already been told to switch to it regardless of whether it validated or not. 2955 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2956 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2957 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2958 return; 2959 } 2960 showValidationNotification(nai, NotificationType.NO_INTERNET); 2961 } 2962 2963 private void handleNetworkUnvalidated(NetworkAgentInfo nai) { 2964 NetworkCapabilities nc = nai.networkCapabilities; 2965 if (DBG) log("handleNetworkUnvalidated " + nai.name() + " cap=" + nc); 2966 2967 if (nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) && 2968 mMultinetworkPolicyTracker.shouldNotifyWifiUnvalidated()) { 2969 showValidationNotification(nai, NotificationType.LOST_INTERNET); 2970 } 2971 } 2972 2973 @Override 2974 public int getMultipathPreference(Network network) { 2975 enforceAccessPermission(); 2976 2977 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2978 if (nai != null && nai.networkCapabilities 2979 .hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)) { 2980 return ConnectivityManager.MULTIPATH_PREFERENCE_UNMETERED; 2981 } 2982 2983 Integer networkPreference = mMultipathPolicyTracker.getMultipathPreference(network); 2984 if (networkPreference != null) { 2985 return networkPreference; 2986 } 2987 2988 return mMultinetworkPolicyTracker.getMeteredMultipathPreference(); 2989 } 2990 2991 private class InternalHandler extends Handler { 2992 public InternalHandler(Looper looper) { 2993 super(looper); 2994 } 2995 2996 @Override 2997 public void handleMessage(Message msg) { 2998 switch (msg.what) { 2999 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 3000 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 3001 handleReleaseNetworkTransitionWakelock(msg.what); 3002 break; 3003 } 3004 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 3005 handleDeprecatedGlobalHttpProxy(); 3006 break; 3007 } 3008 case EVENT_PROXY_HAS_CHANGED: { 3009 handleApplyDefaultProxy((ProxyInfo)msg.obj); 3010 break; 3011 } 3012 case EVENT_REGISTER_NETWORK_FACTORY: { 3013 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 3014 break; 3015 } 3016 case EVENT_UNREGISTER_NETWORK_FACTORY: { 3017 handleUnregisterNetworkFactory((Messenger)msg.obj); 3018 break; 3019 } 3020 case EVENT_REGISTER_NETWORK_AGENT: { 3021 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 3022 break; 3023 } 3024 case EVENT_REGISTER_NETWORK_REQUEST: 3025 case EVENT_REGISTER_NETWORK_LISTENER: { 3026 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 3027 break; 3028 } 3029 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 3030 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 3031 handleRegisterNetworkRequestWithIntent(msg); 3032 break; 3033 } 3034 case EVENT_TIMEOUT_NETWORK_REQUEST: { 3035 NetworkRequestInfo nri = (NetworkRequestInfo) msg.obj; 3036 handleTimedOutNetworkRequest(nri); 3037 break; 3038 } 3039 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 3040 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 3041 break; 3042 } 3043 case EVENT_RELEASE_NETWORK_REQUEST: { 3044 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 3045 break; 3046 } 3047 case EVENT_SET_ACCEPT_UNVALIDATED: { 3048 Network network = (Network) msg.obj; 3049 handleSetAcceptUnvalidated(network, toBool(msg.arg1), toBool(msg.arg2)); 3050 break; 3051 } 3052 case EVENT_SET_AVOID_UNVALIDATED: { 3053 handleSetAvoidUnvalidated((Network) msg.obj); 3054 break; 3055 } 3056 case EVENT_PROMPT_UNVALIDATED: { 3057 handlePromptUnvalidated((Network) msg.obj); 3058 break; 3059 } 3060 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 3061 handleMobileDataAlwaysOn(); 3062 break; 3063 } 3064 // Sent by KeepaliveTracker to process an app request on the state machine thread. 3065 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 3066 mKeepaliveTracker.handleStartKeepalive(msg); 3067 break; 3068 } 3069 // Sent by KeepaliveTracker to process an app request on the state machine thread. 3070 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 3071 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 3072 int slot = msg.arg1; 3073 int reason = msg.arg2; 3074 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 3075 break; 3076 } 3077 case EVENT_SYSTEM_READY: { 3078 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 3079 nai.networkMonitor.systemReady = true; 3080 } 3081 mMultipathPolicyTracker.start(); 3082 break; 3083 } 3084 case EVENT_REVALIDATE_NETWORK: { 3085 handleReportNetworkConnectivity((Network) msg.obj, msg.arg1, toBool(msg.arg2)); 3086 break; 3087 } 3088 case EVENT_PRIVATE_DNS_SETTINGS_CHANGED: 3089 handlePrivateDnsSettingsChanged(); 3090 break; 3091 case EVENT_PRIVATE_DNS_VALIDATION_UPDATE: 3092 handlePrivateDnsValidationUpdate( 3093 (PrivateDnsValidationUpdate) msg.obj); 3094 break; 3095 } 3096 } 3097 } 3098 3099 // javadoc from interface 3100 @Override 3101 public int tether(String iface, String callerPkg) { 3102 ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg); 3103 if (isTetheringSupported()) { 3104 final int status = mTethering.tether(iface); 3105 return status; 3106 } else { 3107 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3108 } 3109 } 3110 3111 // javadoc from interface 3112 @Override 3113 public int untether(String iface, String callerPkg) { 3114 ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg); 3115 3116 if (isTetheringSupported()) { 3117 final int status = mTethering.untether(iface); 3118 return status; 3119 } else { 3120 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3121 } 3122 } 3123 3124 // javadoc from interface 3125 @Override 3126 public int getLastTetherError(String iface) { 3127 enforceTetherAccessPermission(); 3128 3129 if (isTetheringSupported()) { 3130 return mTethering.getLastTetherError(iface); 3131 } else { 3132 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3133 } 3134 } 3135 3136 // TODO - proper iface API for selection by property, inspection, etc 3137 @Override 3138 public String[] getTetherableUsbRegexs() { 3139 enforceTetherAccessPermission(); 3140 if (isTetheringSupported()) { 3141 return mTethering.getTetherableUsbRegexs(); 3142 } else { 3143 return new String[0]; 3144 } 3145 } 3146 3147 @Override 3148 public String[] getTetherableWifiRegexs() { 3149 enforceTetherAccessPermission(); 3150 if (isTetheringSupported()) { 3151 return mTethering.getTetherableWifiRegexs(); 3152 } else { 3153 return new String[0]; 3154 } 3155 } 3156 3157 @Override 3158 public String[] getTetherableBluetoothRegexs() { 3159 enforceTetherAccessPermission(); 3160 if (isTetheringSupported()) { 3161 return mTethering.getTetherableBluetoothRegexs(); 3162 } else { 3163 return new String[0]; 3164 } 3165 } 3166 3167 @Override 3168 public int setUsbTethering(boolean enable, String callerPkg) { 3169 ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg); 3170 if (isTetheringSupported()) { 3171 return mTethering.setUsbTethering(enable); 3172 } else { 3173 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3174 } 3175 } 3176 3177 // TODO - move iface listing, queries, etc to new module 3178 // javadoc from interface 3179 @Override 3180 public String[] getTetherableIfaces() { 3181 enforceTetherAccessPermission(); 3182 return mTethering.getTetherableIfaces(); 3183 } 3184 3185 @Override 3186 public String[] getTetheredIfaces() { 3187 enforceTetherAccessPermission(); 3188 return mTethering.getTetheredIfaces(); 3189 } 3190 3191 @Override 3192 public String[] getTetheringErroredIfaces() { 3193 enforceTetherAccessPermission(); 3194 return mTethering.getErroredIfaces(); 3195 } 3196 3197 @Override 3198 public String[] getTetheredDhcpRanges() { 3199 enforceConnectivityInternalPermission(); 3200 return mTethering.getTetheredDhcpRanges(); 3201 } 3202 3203 @Override 3204 public boolean isTetheringSupported(String callerPkg) { 3205 ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg); 3206 return isTetheringSupported(); 3207 } 3208 3209 // if ro.tether.denied = true we default to no tethering 3210 // gservices could set the secure setting to 1 though to enable it on a build where it 3211 // had previously been turned off. 3212 private boolean isTetheringSupported() { 3213 int defaultVal = encodeBool(!mSystemProperties.get("ro.tether.denied").equals("true")); 3214 boolean tetherSupported = toBool(Settings.Global.getInt(mContext.getContentResolver(), 3215 Settings.Global.TETHER_SUPPORTED, defaultVal)); 3216 boolean tetherEnabledInSettings = tetherSupported 3217 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 3218 3219 // Elevate to system UID to avoid caller requiring MANAGE_USERS permission. 3220 boolean adminUser = false; 3221 final long token = Binder.clearCallingIdentity(); 3222 try { 3223 adminUser = mUserManager.isAdminUser(); 3224 } finally { 3225 Binder.restoreCallingIdentity(token); 3226 } 3227 3228 return tetherEnabledInSettings && adminUser && mTethering.hasTetherableConfiguration(); 3229 } 3230 3231 @Override 3232 public void startTethering(int type, ResultReceiver receiver, boolean showProvisioningUi, 3233 String callerPkg) { 3234 ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg); 3235 if (!isTetheringSupported()) { 3236 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 3237 return; 3238 } 3239 mTethering.startTethering(type, receiver, showProvisioningUi); 3240 } 3241 3242 @Override 3243 public void stopTethering(int type, String callerPkg) { 3244 ConnectivityManager.enforceTetherChangePermission(mContext, callerPkg); 3245 mTethering.stopTethering(type); 3246 } 3247 3248 // Called when we lose the default network and have no replacement yet. 3249 // This will automatically be cleared after X seconds or a new default network 3250 // becomes CONNECTED, whichever happens first. The timer is started by the 3251 // first caller and not restarted by subsequent callers. 3252 private void ensureNetworkTransitionWakelock(String forWhom) { 3253 synchronized (this) { 3254 if (mNetTransitionWakeLock.isHeld()) { 3255 return; 3256 } 3257 mNetTransitionWakeLock.acquire(); 3258 mLastWakeLockAcquireTimestamp = SystemClock.elapsedRealtime(); 3259 mTotalWakelockAcquisitions++; 3260 } 3261 mWakelockLogs.log("ACQUIRE for " + forWhom); 3262 Message msg = mHandler.obtainMessage(EVENT_EXPIRE_NET_TRANSITION_WAKELOCK); 3263 mHandler.sendMessageDelayed(msg, mNetTransitionWakeLockTimeout); 3264 } 3265 3266 // Called when we gain a new default network to release the network transition wakelock in a 3267 // second, to allow a grace period for apps to reconnect over the new network. Pending expiry 3268 // message is cancelled. 3269 private void scheduleReleaseNetworkTransitionWakelock() { 3270 synchronized (this) { 3271 if (!mNetTransitionWakeLock.isHeld()) { 3272 return; // expiry message released the lock first. 3273 } 3274 } 3275 // Cancel self timeout on wakelock hold. 3276 mHandler.removeMessages(EVENT_EXPIRE_NET_TRANSITION_WAKELOCK); 3277 Message msg = mHandler.obtainMessage(EVENT_CLEAR_NET_TRANSITION_WAKELOCK); 3278 mHandler.sendMessageDelayed(msg, 1000); 3279 } 3280 3281 // Called when either message of ensureNetworkTransitionWakelock or 3282 // scheduleReleaseNetworkTransitionWakelock is processed. 3283 private void handleReleaseNetworkTransitionWakelock(int eventId) { 3284 String event = eventName(eventId); 3285 synchronized (this) { 3286 if (!mNetTransitionWakeLock.isHeld()) { 3287 mWakelockLogs.log(String.format("RELEASE: already released (%s)", event)); 3288 Slog.w(TAG, "expected Net Transition WakeLock to be held"); 3289 return; 3290 } 3291 mNetTransitionWakeLock.release(); 3292 long lockDuration = SystemClock.elapsedRealtime() - mLastWakeLockAcquireTimestamp; 3293 mTotalWakelockDurationMs += lockDuration; 3294 mMaxWakelockDurationMs = Math.max(mMaxWakelockDurationMs, lockDuration); 3295 mTotalWakelockReleases++; 3296 } 3297 mWakelockLogs.log(String.format("RELEASE (%s)", event)); 3298 } 3299 3300 // 100 percent is full good, 0 is full bad. 3301 @Override 3302 public void reportInetCondition(int networkType, int percentage) { 3303 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 3304 if (nai == null) return; 3305 reportNetworkConnectivity(nai.network, percentage > 50); 3306 } 3307 3308 @Override 3309 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 3310 enforceAccessPermission(); 3311 enforceInternetPermission(); 3312 final int uid = Binder.getCallingUid(); 3313 final int connectivityInfo = encodeBool(hasConnectivity); 3314 mHandler.sendMessage( 3315 mHandler.obtainMessage(EVENT_REVALIDATE_NETWORK, uid, connectivityInfo, network)); 3316 } 3317 3318 private void handleReportNetworkConnectivity( 3319 Network network, int uid, boolean hasConnectivity) { 3320 final NetworkAgentInfo nai; 3321 if (network == null) { 3322 nai = getDefaultNetwork(); 3323 } else { 3324 nai = getNetworkAgentInfoForNetwork(network); 3325 } 3326 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 3327 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 3328 return; 3329 } 3330 // Revalidate if the app report does not match our current validated state. 3331 if (hasConnectivity == nai.lastValidated) { 3332 return; 3333 } 3334 if (DBG) { 3335 int netid = nai.network.netId; 3336 log("reportNetworkConnectivity(" + netid + ", " + hasConnectivity + ") by " + uid); 3337 } 3338 // Validating a network that has not yet connected could result in a call to 3339 // rematchNetworkAndRequests() which is not meant to work on such networks. 3340 if (!nai.everConnected) { 3341 return; 3342 } 3343 LinkProperties lp = getLinkProperties(nai); 3344 if (isNetworkWithLinkPropertiesBlocked(lp, uid, false)) { 3345 return; 3346 } 3347 nai.networkMonitor.forceReevaluation(uid); 3348 } 3349 3350 private ProxyInfo getDefaultProxy() { 3351 // this information is already available as a world read/writable jvm property 3352 // so this API change wouldn't have a benifit. It also breaks the passing 3353 // of proxy info to all the JVMs. 3354 // enforceAccessPermission(); 3355 synchronized (mProxyLock) { 3356 ProxyInfo ret = mGlobalProxy; 3357 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3358 return ret; 3359 } 3360 } 3361 3362 @Override 3363 public ProxyInfo getProxyForNetwork(Network network) { 3364 if (network == null) return getDefaultProxy(); 3365 final ProxyInfo globalProxy = getGlobalProxy(); 3366 if (globalProxy != null) return globalProxy; 3367 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3368 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3369 // caller may not have. 3370 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3371 if (nai == null) return null; 3372 synchronized (nai) { 3373 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3374 if (proxyInfo == null) return null; 3375 return new ProxyInfo(proxyInfo); 3376 } 3377 } 3378 3379 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3380 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3381 // proxy is null then there is no proxy in place). 3382 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3383 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3384 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3385 proxy = null; 3386 } 3387 return proxy; 3388 } 3389 3390 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3391 // better for determining if a new proxy broadcast is necessary: 3392 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3393 // avoid unnecessary broadcasts. 3394 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3395 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3396 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3397 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3398 // all set. 3399 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3400 a = canonicalizeProxyInfo(a); 3401 b = canonicalizeProxyInfo(b); 3402 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3403 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3404 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3405 } 3406 3407 public void setGlobalProxy(ProxyInfo proxyProperties) { 3408 enforceConnectivityInternalPermission(); 3409 3410 synchronized (mProxyLock) { 3411 if (proxyProperties == mGlobalProxy) return; 3412 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3413 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3414 3415 String host = ""; 3416 int port = 0; 3417 String exclList = ""; 3418 String pacFileUrl = ""; 3419 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3420 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3421 if (!proxyProperties.isValid()) { 3422 if (DBG) 3423 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3424 return; 3425 } 3426 mGlobalProxy = new ProxyInfo(proxyProperties); 3427 host = mGlobalProxy.getHost(); 3428 port = mGlobalProxy.getPort(); 3429 exclList = mGlobalProxy.getExclusionListAsString(); 3430 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3431 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3432 } 3433 } else { 3434 mGlobalProxy = null; 3435 } 3436 ContentResolver res = mContext.getContentResolver(); 3437 final long token = Binder.clearCallingIdentity(); 3438 try { 3439 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3440 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3441 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3442 exclList); 3443 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3444 } finally { 3445 Binder.restoreCallingIdentity(token); 3446 } 3447 3448 if (mGlobalProxy == null) { 3449 proxyProperties = mDefaultProxy; 3450 } 3451 sendProxyBroadcast(proxyProperties); 3452 } 3453 } 3454 3455 private void loadGlobalProxy() { 3456 ContentResolver res = mContext.getContentResolver(); 3457 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3458 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3459 String exclList = Settings.Global.getString(res, 3460 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3461 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3462 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3463 ProxyInfo proxyProperties; 3464 if (!TextUtils.isEmpty(pacFileUrl)) { 3465 proxyProperties = new ProxyInfo(pacFileUrl); 3466 } else { 3467 proxyProperties = new ProxyInfo(host, port, exclList); 3468 } 3469 if (!proxyProperties.isValid()) { 3470 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3471 return; 3472 } 3473 3474 synchronized (mProxyLock) { 3475 mGlobalProxy = proxyProperties; 3476 } 3477 } 3478 } 3479 3480 public ProxyInfo getGlobalProxy() { 3481 // this information is already available as a world read/writable jvm property 3482 // so this API change wouldn't have a benifit. It also breaks the passing 3483 // of proxy info to all the JVMs. 3484 // enforceAccessPermission(); 3485 synchronized (mProxyLock) { 3486 return mGlobalProxy; 3487 } 3488 } 3489 3490 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3491 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3492 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3493 proxy = null; 3494 } 3495 synchronized (mProxyLock) { 3496 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3497 if (mDefaultProxy == proxy) return; // catches repeated nulls 3498 if (proxy != null && !proxy.isValid()) { 3499 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3500 return; 3501 } 3502 3503 // This call could be coming from the PacManager, containing the port of the local 3504 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3505 // global (to get the correct local port), and send a broadcast. 3506 // TODO: Switch PacManager to have its own message to send back rather than 3507 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3508 if ((mGlobalProxy != null) && (proxy != null) 3509 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3510 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3511 mGlobalProxy = proxy; 3512 sendProxyBroadcast(mGlobalProxy); 3513 return; 3514 } 3515 mDefaultProxy = proxy; 3516 3517 if (mGlobalProxy != null) return; 3518 if (!mDefaultProxyDisabled) { 3519 sendProxyBroadcast(proxy); 3520 } 3521 } 3522 } 3523 3524 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3525 // This method gets called when any network changes proxy, but the broadcast only ever contains 3526 // the default proxy (even if it hasn't changed). 3527 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3528 // world where an app might be bound to a non-default network. 3529 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3530 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3531 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3532 3533 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3534 sendProxyBroadcast(getDefaultProxy()); 3535 } 3536 } 3537 3538 private void handleDeprecatedGlobalHttpProxy() { 3539 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3540 Settings.Global.HTTP_PROXY); 3541 if (!TextUtils.isEmpty(proxy)) { 3542 String data[] = proxy.split(":"); 3543 if (data.length == 0) { 3544 return; 3545 } 3546 3547 String proxyHost = data[0]; 3548 int proxyPort = 8080; 3549 if (data.length > 1) { 3550 try { 3551 proxyPort = Integer.parseInt(data[1]); 3552 } catch (NumberFormatException e) { 3553 return; 3554 } 3555 } 3556 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3557 setGlobalProxy(p); 3558 } 3559 } 3560 3561 private void sendProxyBroadcast(ProxyInfo proxy) { 3562 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3563 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3564 if (DBG) log("sending Proxy Broadcast for " + proxy); 3565 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3566 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3567 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3568 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3569 final long ident = Binder.clearCallingIdentity(); 3570 try { 3571 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3572 } finally { 3573 Binder.restoreCallingIdentity(ident); 3574 } 3575 } 3576 3577 private static class SettingsObserver extends ContentObserver { 3578 final private HashMap<Uri, Integer> mUriEventMap; 3579 final private Context mContext; 3580 final private Handler mHandler; 3581 3582 SettingsObserver(Context context, Handler handler) { 3583 super(null); 3584 mUriEventMap = new HashMap<Uri, Integer>(); 3585 mContext = context; 3586 mHandler = handler; 3587 } 3588 3589 void observe(Uri uri, int what) { 3590 mUriEventMap.put(uri, what); 3591 final ContentResolver resolver = mContext.getContentResolver(); 3592 resolver.registerContentObserver(uri, false, this); 3593 } 3594 3595 @Override 3596 public void onChange(boolean selfChange) { 3597 Slog.wtf(TAG, "Should never be reached."); 3598 } 3599 3600 @Override 3601 public void onChange(boolean selfChange, Uri uri) { 3602 final Integer what = mUriEventMap.get(uri); 3603 if (what != null) { 3604 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3605 } else { 3606 loge("No matching event to send for URI=" + uri); 3607 } 3608 } 3609 } 3610 3611 private static void log(String s) { 3612 Slog.d(TAG, s); 3613 } 3614 3615 private static void loge(String s) { 3616 Slog.e(TAG, s); 3617 } 3618 3619 private static void loge(String s, Throwable t) { 3620 Slog.e(TAG, s, t); 3621 } 3622 3623 /** 3624 * Prepare for a VPN application. 3625 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3626 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3627 * 3628 * @param oldPackage Package name of the application which currently controls VPN, which will 3629 * be replaced. If there is no such application, this should should either be 3630 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3631 * @param newPackage Package name of the application which should gain control of VPN, or 3632 * {@code null} to disable. 3633 * @param userId User for whom to prepare the new VPN. 3634 * 3635 * @hide 3636 */ 3637 @Override 3638 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3639 int userId) { 3640 enforceCrossUserPermission(userId); 3641 3642 synchronized (mVpns) { 3643 throwIfLockdownEnabled(); 3644 Vpn vpn = mVpns.get(userId); 3645 if (vpn != null) { 3646 return vpn.prepare(oldPackage, newPackage); 3647 } else { 3648 return false; 3649 } 3650 } 3651 } 3652 3653 /** 3654 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3655 * This method is used by system-privileged apps. 3656 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3657 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3658 * 3659 * @param packageName The package for which authorization state should change. 3660 * @param userId User for whom {@code packageName} is installed. 3661 * @param authorized {@code true} if this app should be able to start a VPN connection without 3662 * explicit user approval, {@code false} if not. 3663 * 3664 * @hide 3665 */ 3666 @Override 3667 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3668 enforceCrossUserPermission(userId); 3669 3670 synchronized (mVpns) { 3671 Vpn vpn = mVpns.get(userId); 3672 if (vpn != null) { 3673 vpn.setPackageAuthorization(packageName, authorized); 3674 } 3675 } 3676 } 3677 3678 /** 3679 * Configure a TUN interface and return its file descriptor. Parameters 3680 * are encoded and opaque to this class. This method is used by VpnBuilder 3681 * and not available in ConnectivityManager. Permissions are checked in 3682 * Vpn class. 3683 * @hide 3684 */ 3685 @Override 3686 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3687 int user = UserHandle.getUserId(Binder.getCallingUid()); 3688 synchronized (mVpns) { 3689 throwIfLockdownEnabled(); 3690 return mVpns.get(user).establish(config); 3691 } 3692 } 3693 3694 /** 3695 * Start legacy VPN, controlling native daemons as needed. Creates a 3696 * secondary thread to perform connection work, returning quickly. 3697 */ 3698 @Override 3699 public void startLegacyVpn(VpnProfile profile) { 3700 int user = UserHandle.getUserId(Binder.getCallingUid()); 3701 final LinkProperties egress = getActiveLinkProperties(); 3702 if (egress == null) { 3703 throw new IllegalStateException("Missing active network connection"); 3704 } 3705 synchronized (mVpns) { 3706 throwIfLockdownEnabled(); 3707 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3708 } 3709 } 3710 3711 /** 3712 * Return the information of the ongoing legacy VPN. This method is used 3713 * by VpnSettings and not available in ConnectivityManager. Permissions 3714 * are checked in Vpn class. 3715 */ 3716 @Override 3717 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3718 enforceCrossUserPermission(userId); 3719 3720 synchronized (mVpns) { 3721 return mVpns.get(userId).getLegacyVpnInfo(); 3722 } 3723 } 3724 3725 /** 3726 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3727 * and not available in ConnectivityManager. 3728 */ 3729 @Override 3730 public VpnInfo[] getAllVpnInfo() { 3731 enforceConnectivityInternalPermission(); 3732 synchronized (mVpns) { 3733 if (mLockdownEnabled) { 3734 return new VpnInfo[0]; 3735 } 3736 3737 List<VpnInfo> infoList = new ArrayList<>(); 3738 for (int i = 0; i < mVpns.size(); i++) { 3739 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3740 if (info != null) { 3741 infoList.add(info); 3742 } 3743 } 3744 return infoList.toArray(new VpnInfo[infoList.size()]); 3745 } 3746 } 3747 3748 /** 3749 * @return VPN information for accounting, or null if we can't retrieve all required 3750 * information, e.g primary underlying iface. 3751 */ 3752 @Nullable 3753 private VpnInfo createVpnInfo(Vpn vpn) { 3754 VpnInfo info = vpn.getVpnInfo(); 3755 if (info == null) { 3756 return null; 3757 } 3758 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3759 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3760 // the underlyingNetworks list. 3761 if (underlyingNetworks == null) { 3762 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3763 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3764 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3765 } 3766 } else if (underlyingNetworks.length > 0) { 3767 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3768 if (linkProperties != null) { 3769 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3770 } 3771 } 3772 return info.primaryUnderlyingIface == null ? null : info; 3773 } 3774 3775 /** 3776 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3777 * VpnDialogs and not available in ConnectivityManager. 3778 * Permissions are checked in Vpn class. 3779 * @hide 3780 */ 3781 @Override 3782 public VpnConfig getVpnConfig(int userId) { 3783 enforceCrossUserPermission(userId); 3784 synchronized (mVpns) { 3785 Vpn vpn = mVpns.get(userId); 3786 if (vpn != null) { 3787 return vpn.getVpnConfig(); 3788 } else { 3789 return null; 3790 } 3791 } 3792 } 3793 3794 /** 3795 * Ask all VPN objects to recompute and update their capabilities. 3796 * 3797 * When underlying networks change, VPNs may have to update capabilities to reflect things 3798 * like the metered bit, their transports, and so on. This asks the VPN objects to update 3799 * their capabilities, and as this will cause them to send messages to the ConnectivityService 3800 * handler thread through their agent, this is asynchronous. When the capabilities objects 3801 * are computed they will be up-to-date as they are computed synchronously from here and 3802 * this is running on the ConnectivityService thread. 3803 * TODO : Fix this and call updateCapabilities inline to remove out-of-order events. 3804 */ 3805 private void updateAllVpnsCapabilities() { 3806 synchronized (mVpns) { 3807 for (int i = 0; i < mVpns.size(); i++) { 3808 final Vpn vpn = mVpns.valueAt(i); 3809 vpn.updateCapabilities(); 3810 } 3811 } 3812 } 3813 3814 @Override 3815 public boolean updateLockdownVpn() { 3816 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3817 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3818 return false; 3819 } 3820 3821 synchronized (mVpns) { 3822 // Tear down existing lockdown if profile was removed 3823 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3824 if (mLockdownEnabled) { 3825 byte[] profileTag = mKeyStore.get(Credentials.LOCKDOWN_VPN); 3826 if (profileTag == null) { 3827 Slog.e(TAG, "Lockdown VPN configured but cannot be read from keystore"); 3828 return false; 3829 } 3830 String profileName = new String(profileTag); 3831 final VpnProfile profile = VpnProfile.decode( 3832 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3833 if (profile == null) { 3834 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3835 setLockdownTracker(null); 3836 return true; 3837 } 3838 int user = UserHandle.getUserId(Binder.getCallingUid()); 3839 Vpn vpn = mVpns.get(user); 3840 if (vpn == null) { 3841 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3842 return false; 3843 } 3844 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3845 } else { 3846 setLockdownTracker(null); 3847 } 3848 } 3849 3850 return true; 3851 } 3852 3853 /** 3854 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3855 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3856 */ 3857 @GuardedBy("mVpns") 3858 private void setLockdownTracker(LockdownVpnTracker tracker) { 3859 // Shutdown any existing tracker 3860 final LockdownVpnTracker existing = mLockdownTracker; 3861 mLockdownTracker = null; 3862 if (existing != null) { 3863 existing.shutdown(); 3864 } 3865 3866 if (tracker != null) { 3867 mLockdownTracker = tracker; 3868 mLockdownTracker.init(); 3869 } 3870 } 3871 3872 @GuardedBy("mVpns") 3873 private void throwIfLockdownEnabled() { 3874 if (mLockdownEnabled) { 3875 throw new IllegalStateException("Unavailable in lockdown mode"); 3876 } 3877 } 3878 3879 /** 3880 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3881 * some setup and then call {@code establish()} to connect. 3882 * 3883 * @return {@code true} if the service was started, the service was already connected, or there 3884 * was no always-on VPN to start. {@code false} otherwise. 3885 */ 3886 private boolean startAlwaysOnVpn(int userId) { 3887 synchronized (mVpns) { 3888 Vpn vpn = mVpns.get(userId); 3889 if (vpn == null) { 3890 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3891 // exists already. 3892 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3893 return false; 3894 } 3895 3896 return vpn.startAlwaysOnVpn(); 3897 } 3898 } 3899 3900 @Override 3901 public boolean isAlwaysOnVpnPackageSupported(int userId, String packageName) { 3902 enforceSettingsPermission(); 3903 enforceCrossUserPermission(userId); 3904 3905 synchronized (mVpns) { 3906 Vpn vpn = mVpns.get(userId); 3907 if (vpn == null) { 3908 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3909 return false; 3910 } 3911 return vpn.isAlwaysOnPackageSupported(packageName); 3912 } 3913 } 3914 3915 @Override 3916 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3917 enforceConnectivityInternalPermission(); 3918 enforceCrossUserPermission(userId); 3919 3920 synchronized (mVpns) { 3921 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3922 if (LockdownVpnTracker.isEnabled()) { 3923 return false; 3924 } 3925 3926 Vpn vpn = mVpns.get(userId); 3927 if (vpn == null) { 3928 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3929 return false; 3930 } 3931 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3932 return false; 3933 } 3934 if (!startAlwaysOnVpn(userId)) { 3935 vpn.setAlwaysOnPackage(null, false); 3936 return false; 3937 } 3938 } 3939 return true; 3940 } 3941 3942 @Override 3943 public String getAlwaysOnVpnPackage(int userId) { 3944 enforceConnectivityInternalPermission(); 3945 enforceCrossUserPermission(userId); 3946 3947 synchronized (mVpns) { 3948 Vpn vpn = mVpns.get(userId); 3949 if (vpn == null) { 3950 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3951 return null; 3952 } 3953 return vpn.getAlwaysOnPackage(); 3954 } 3955 } 3956 3957 @Override 3958 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3959 // TODO: Remove? Any reason to trigger a provisioning check? 3960 return -1; 3961 } 3962 3963 /** Location to an updatable file listing carrier provisioning urls. 3964 * An example: 3965 * 3966 * <?xml version="1.0" encoding="utf-8"?> 3967 * <provisioningUrls> 3968 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3969 * </provisioningUrls> 3970 */ 3971 private static final String PROVISIONING_URL_PATH = 3972 "/data/misc/radio/provisioning_urls.xml"; 3973 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3974 3975 /** XML tag for root element. */ 3976 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3977 /** XML tag for individual url */ 3978 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3979 /** XML attribute for mcc */ 3980 private static final String ATTR_MCC = "mcc"; 3981 /** XML attribute for mnc */ 3982 private static final String ATTR_MNC = "mnc"; 3983 3984 private String getProvisioningUrlBaseFromFile() { 3985 FileReader fileReader = null; 3986 XmlPullParser parser = null; 3987 Configuration config = mContext.getResources().getConfiguration(); 3988 3989 try { 3990 fileReader = new FileReader(mProvisioningUrlFile); 3991 parser = Xml.newPullParser(); 3992 parser.setInput(fileReader); 3993 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3994 3995 while (true) { 3996 XmlUtils.nextElement(parser); 3997 3998 String element = parser.getName(); 3999 if (element == null) break; 4000 4001 if (element.equals(TAG_PROVISIONING_URL)) { 4002 String mcc = parser.getAttributeValue(null, ATTR_MCC); 4003 try { 4004 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 4005 String mnc = parser.getAttributeValue(null, ATTR_MNC); 4006 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 4007 parser.next(); 4008 if (parser.getEventType() == XmlPullParser.TEXT) { 4009 return parser.getText(); 4010 } 4011 } 4012 } 4013 } catch (NumberFormatException e) { 4014 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 4015 } 4016 } 4017 } 4018 return null; 4019 } catch (FileNotFoundException e) { 4020 loge("Carrier Provisioning Urls file not found"); 4021 } catch (XmlPullParserException e) { 4022 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 4023 } catch (IOException e) { 4024 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 4025 } finally { 4026 if (fileReader != null) { 4027 try { 4028 fileReader.close(); 4029 } catch (IOException e) {} 4030 } 4031 } 4032 return null; 4033 } 4034 4035 @Override 4036 public String getMobileProvisioningUrl() { 4037 enforceConnectivityInternalPermission(); 4038 String url = getProvisioningUrlBaseFromFile(); 4039 if (TextUtils.isEmpty(url)) { 4040 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 4041 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 4042 } else { 4043 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 4044 } 4045 // populate the iccid, imei and phone number in the provisioning url. 4046 if (!TextUtils.isEmpty(url)) { 4047 String phoneNumber = mTelephonyManager.getLine1Number(); 4048 if (TextUtils.isEmpty(phoneNumber)) { 4049 phoneNumber = "0000000000"; 4050 } 4051 url = String.format(url, 4052 mTelephonyManager.getSimSerialNumber() /* ICCID */, 4053 mTelephonyManager.getDeviceId() /* IMEI */, 4054 phoneNumber /* Phone numer */); 4055 } 4056 4057 return url; 4058 } 4059 4060 @Override 4061 public void setProvisioningNotificationVisible(boolean visible, int networkType, 4062 String action) { 4063 enforceConnectivityInternalPermission(); 4064 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 4065 return; 4066 } 4067 final long ident = Binder.clearCallingIdentity(); 4068 try { 4069 // Concatenate the range of types onto the range of NetIDs. 4070 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 4071 mNotifier.setProvNotificationVisible(visible, id, action); 4072 } finally { 4073 Binder.restoreCallingIdentity(ident); 4074 } 4075 } 4076 4077 @Override 4078 public void setAirplaneMode(boolean enable) { 4079 enforceConnectivityInternalPermission(); 4080 final long ident = Binder.clearCallingIdentity(); 4081 try { 4082 final ContentResolver cr = mContext.getContentResolver(); 4083 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, encodeBool(enable)); 4084 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 4085 intent.putExtra("state", enable); 4086 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 4087 } finally { 4088 Binder.restoreCallingIdentity(ident); 4089 } 4090 } 4091 4092 private void onUserStart(int userId) { 4093 synchronized (mVpns) { 4094 Vpn userVpn = mVpns.get(userId); 4095 if (userVpn != null) { 4096 loge("Starting user already has a VPN"); 4097 return; 4098 } 4099 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 4100 mVpns.put(userId, userVpn); 4101 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 4102 updateLockdownVpn(); 4103 } 4104 } 4105 } 4106 4107 private void onUserStop(int userId) { 4108 synchronized (mVpns) { 4109 Vpn userVpn = mVpns.get(userId); 4110 if (userVpn == null) { 4111 loge("Stopped user has no VPN"); 4112 return; 4113 } 4114 userVpn.onUserStopped(); 4115 mVpns.delete(userId); 4116 } 4117 } 4118 4119 private void onUserAdded(int userId) { 4120 synchronized (mVpns) { 4121 final int vpnsSize = mVpns.size(); 4122 for (int i = 0; i < vpnsSize; i++) { 4123 Vpn vpn = mVpns.valueAt(i); 4124 vpn.onUserAdded(userId); 4125 } 4126 } 4127 } 4128 4129 private void onUserRemoved(int userId) { 4130 synchronized (mVpns) { 4131 final int vpnsSize = mVpns.size(); 4132 for (int i = 0; i < vpnsSize; i++) { 4133 Vpn vpn = mVpns.valueAt(i); 4134 vpn.onUserRemoved(userId); 4135 } 4136 } 4137 } 4138 4139 private void onUserUnlocked(int userId) { 4140 synchronized (mVpns) { 4141 // User present may be sent because of an unlock, which might mean an unlocked keystore. 4142 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 4143 updateLockdownVpn(); 4144 } else { 4145 startAlwaysOnVpn(userId); 4146 } 4147 } 4148 } 4149 4150 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 4151 @Override 4152 public void onReceive(Context context, Intent intent) { 4153 final String action = intent.getAction(); 4154 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 4155 if (userId == UserHandle.USER_NULL) return; 4156 4157 if (Intent.ACTION_USER_STARTED.equals(action)) { 4158 onUserStart(userId); 4159 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 4160 onUserStop(userId); 4161 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 4162 onUserAdded(userId); 4163 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 4164 onUserRemoved(userId); 4165 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 4166 onUserUnlocked(userId); 4167 } 4168 } 4169 }; 4170 4171 private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() { 4172 @Override 4173 public void onReceive(Context context, Intent intent) { 4174 // Try creating lockdown tracker, since user present usually means 4175 // unlocked keystore. 4176 updateLockdownVpn(); 4177 mContext.unregisterReceiver(this); 4178 } 4179 }; 4180 4181 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 4182 new HashMap<Messenger, NetworkFactoryInfo>(); 4183 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 4184 new HashMap<NetworkRequest, NetworkRequestInfo>(); 4185 4186 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 4187 // Map from UID to number of NetworkRequests that UID has filed. 4188 @GuardedBy("mUidToNetworkRequestCount") 4189 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 4190 4191 private static class NetworkFactoryInfo { 4192 public final String name; 4193 public final Messenger messenger; 4194 public final AsyncChannel asyncChannel; 4195 4196 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 4197 this.name = name; 4198 this.messenger = messenger; 4199 this.asyncChannel = asyncChannel; 4200 } 4201 } 4202 4203 private void ensureNetworkRequestHasType(NetworkRequest request) { 4204 if (request.type == NetworkRequest.Type.NONE) { 4205 throw new IllegalArgumentException( 4206 "All NetworkRequests in ConnectivityService must have a type"); 4207 } 4208 } 4209 4210 /** 4211 * Tracks info about the requester. 4212 * Also used to notice when the calling process dies so we can self-expire 4213 */ 4214 private class NetworkRequestInfo implements IBinder.DeathRecipient { 4215 final NetworkRequest request; 4216 final PendingIntent mPendingIntent; 4217 boolean mPendingIntentSent; 4218 private final IBinder mBinder; 4219 final int mPid; 4220 final int mUid; 4221 final Messenger messenger; 4222 4223 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 4224 request = r; 4225 ensureNetworkRequestHasType(request); 4226 mPendingIntent = pi; 4227 messenger = null; 4228 mBinder = null; 4229 mPid = getCallingPid(); 4230 mUid = getCallingUid(); 4231 enforceRequestCountLimit(); 4232 } 4233 4234 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 4235 super(); 4236 messenger = m; 4237 request = r; 4238 ensureNetworkRequestHasType(request); 4239 mBinder = binder; 4240 mPid = getCallingPid(); 4241 mUid = getCallingUid(); 4242 mPendingIntent = null; 4243 enforceRequestCountLimit(); 4244 4245 try { 4246 mBinder.linkToDeath(this, 0); 4247 } catch (RemoteException e) { 4248 binderDied(); 4249 } 4250 } 4251 4252 private void enforceRequestCountLimit() { 4253 synchronized (mUidToNetworkRequestCount) { 4254 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 4255 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 4256 throw new ServiceSpecificException( 4257 ConnectivityManager.Errors.TOO_MANY_REQUESTS); 4258 } 4259 mUidToNetworkRequestCount.put(mUid, networkRequests); 4260 } 4261 } 4262 4263 void unlinkDeathRecipient() { 4264 if (mBinder != null) { 4265 mBinder.unlinkToDeath(this, 0); 4266 } 4267 } 4268 4269 public void binderDied() { 4270 log("ConnectivityService NetworkRequestInfo binderDied(" + 4271 request + ", " + mBinder + ")"); 4272 releaseNetworkRequest(request); 4273 } 4274 4275 public String toString() { 4276 return "uid/pid:" + mUid + "/" + mPid + " " + request + 4277 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 4278 } 4279 } 4280 4281 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 4282 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 4283 if (badCapability != null) { 4284 throw new IllegalArgumentException("Cannot request network with " + badCapability); 4285 } 4286 } 4287 4288 // This checks that the passed capabilities either do not request a specific SSID, or the 4289 // calling app has permission to do so. 4290 private void ensureSufficientPermissionsForRequest(NetworkCapabilities nc, 4291 int callerPid, int callerUid) { 4292 if (null != nc.getSSID() && !checkSettingsPermission(callerPid, callerUid)) { 4293 throw new SecurityException("Insufficient permissions to request a specific SSID"); 4294 } 4295 } 4296 4297 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 4298 final SortedSet<Integer> thresholds = new TreeSet(); 4299 synchronized (nai) { 4300 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4301 if (nri.request.networkCapabilities.hasSignalStrength() && 4302 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 4303 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 4304 } 4305 } 4306 } 4307 return new ArrayList<Integer>(thresholds); 4308 } 4309 4310 private void updateSignalStrengthThresholds( 4311 NetworkAgentInfo nai, String reason, NetworkRequest request) { 4312 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 4313 Bundle thresholds = new Bundle(); 4314 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 4315 4316 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 4317 String detail; 4318 if (request != null && request.networkCapabilities.hasSignalStrength()) { 4319 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 4320 } else { 4321 detail = reason; 4322 } 4323 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 4324 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 4325 } 4326 4327 nai.asyncChannel.sendMessage( 4328 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 4329 0, 0, thresholds); 4330 } 4331 4332 private void ensureValidNetworkSpecifier(NetworkCapabilities nc) { 4333 if (nc == null) { 4334 return; 4335 } 4336 NetworkSpecifier ns = nc.getNetworkSpecifier(); 4337 if (ns == null) { 4338 return; 4339 } 4340 MatchAllNetworkSpecifier.checkNotMatchAllNetworkSpecifier(ns); 4341 ns.assertValidFromUid(Binder.getCallingUid()); 4342 } 4343 4344 @Override 4345 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 4346 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 4347 final NetworkRequest.Type type = (networkCapabilities == null) 4348 ? NetworkRequest.Type.TRACK_DEFAULT 4349 : NetworkRequest.Type.REQUEST; 4350 // If the requested networkCapabilities is null, take them instead from 4351 // the default network request. This allows callers to keep track of 4352 // the system default network. 4353 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 4354 networkCapabilities = createDefaultNetworkCapabilitiesForUid(Binder.getCallingUid()); 4355 enforceAccessPermission(); 4356 } else { 4357 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4358 enforceNetworkRequestPermissions(networkCapabilities); 4359 // TODO: this is incorrect. We mark the request as metered or not depending on the state 4360 // of the app when the request is filed, but we never change the request if the app 4361 // changes network state. http://b/29964605 4362 enforceMeteredApnPolicy(networkCapabilities); 4363 } 4364 ensureRequestableCapabilities(networkCapabilities); 4365 ensureSufficientPermissionsForRequest(networkCapabilities, 4366 Binder.getCallingPid(), Binder.getCallingUid()); 4367 // Set the UID range for this request to the single UID of the requester, or to an empty 4368 // set of UIDs if the caller has the appropriate permission and UIDs have not been set. 4369 // This will overwrite any allowed UIDs in the requested capabilities. Though there 4370 // are no visible methods to set the UIDs, an app could use reflection to try and get 4371 // networks for other apps so it's essential that the UIDs are overwritten. 4372 restrictRequestUidsForCaller(networkCapabilities); 4373 4374 if (timeoutMs < 0) { 4375 throw new IllegalArgumentException("Bad timeout specified"); 4376 } 4377 ensureValidNetworkSpecifier(networkCapabilities); 4378 4379 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4380 nextNetworkRequestId(), type); 4381 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4382 if (DBG) log("requestNetwork for " + nri); 4383 4384 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4385 if (timeoutMs > 0) { 4386 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4387 nri), timeoutMs); 4388 } 4389 return networkRequest; 4390 } 4391 4392 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4393 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4394 enforceConnectivityRestrictedNetworksPermission(); 4395 } else { 4396 enforceChangePermission(); 4397 } 4398 } 4399 4400 @Override 4401 public boolean requestBandwidthUpdate(Network network) { 4402 enforceAccessPermission(); 4403 NetworkAgentInfo nai = null; 4404 if (network == null) { 4405 return false; 4406 } 4407 synchronized (mNetworkForNetId) { 4408 nai = mNetworkForNetId.get(network.netId); 4409 } 4410 if (nai != null) { 4411 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4412 return true; 4413 } 4414 return false; 4415 } 4416 4417 private boolean isSystem(int uid) { 4418 return uid < Process.FIRST_APPLICATION_UID; 4419 } 4420 4421 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4422 final int uid = Binder.getCallingUid(); 4423 if (isSystem(uid)) { 4424 // Exemption for system uid. 4425 return; 4426 } 4427 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED)) { 4428 // Policy already enforced. 4429 return; 4430 } 4431 if (mPolicyManagerInternal.isUidRestrictedOnMeteredNetworks(uid)) { 4432 // If UID is restricted, don't allow them to bring up metered APNs. 4433 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4434 } 4435 } 4436 4437 @Override 4438 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4439 PendingIntent operation) { 4440 checkNotNull(operation, "PendingIntent cannot be null."); 4441 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4442 enforceNetworkRequestPermissions(networkCapabilities); 4443 enforceMeteredApnPolicy(networkCapabilities); 4444 ensureRequestableCapabilities(networkCapabilities); 4445 ensureSufficientPermissionsForRequest(networkCapabilities, 4446 Binder.getCallingPid(), Binder.getCallingUid()); 4447 ensureValidNetworkSpecifier(networkCapabilities); 4448 restrictRequestUidsForCaller(networkCapabilities); 4449 4450 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4451 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4452 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4453 if (DBG) log("pendingRequest for " + nri); 4454 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4455 nri)); 4456 return networkRequest; 4457 } 4458 4459 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4460 mHandler.sendMessageDelayed( 4461 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4462 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4463 } 4464 4465 @Override 4466 public void releasePendingNetworkRequest(PendingIntent operation) { 4467 checkNotNull(operation, "PendingIntent cannot be null."); 4468 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4469 getCallingUid(), 0, operation)); 4470 } 4471 4472 // In order to implement the compatibility measure for pre-M apps that call 4473 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4474 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4475 // This ensures it has permission to do so. 4476 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4477 if (nc == null) { 4478 return false; 4479 } 4480 int[] transportTypes = nc.getTransportTypes(); 4481 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4482 return false; 4483 } 4484 try { 4485 mContext.enforceCallingOrSelfPermission( 4486 android.Manifest.permission.ACCESS_WIFI_STATE, 4487 "ConnectivityService"); 4488 } catch (SecurityException e) { 4489 return false; 4490 } 4491 return true; 4492 } 4493 4494 @Override 4495 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4496 Messenger messenger, IBinder binder) { 4497 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4498 enforceAccessPermission(); 4499 } 4500 4501 NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities); 4502 ensureSufficientPermissionsForRequest(networkCapabilities, 4503 Binder.getCallingPid(), Binder.getCallingUid()); 4504 restrictRequestUidsForCaller(nc); 4505 // Apps without the CHANGE_NETWORK_STATE permission can't use background networks, so 4506 // make all their listens include NET_CAPABILITY_FOREGROUND. That way, they will get 4507 // onLost and onAvailable callbacks when networks move in and out of the background. 4508 // There is no need to do this for requests because an app without CHANGE_NETWORK_STATE 4509 // can't request networks. 4510 restrictBackgroundRequestForCaller(nc); 4511 ensureValidNetworkSpecifier(nc); 4512 4513 NetworkRequest networkRequest = new NetworkRequest(nc, TYPE_NONE, nextNetworkRequestId(), 4514 NetworkRequest.Type.LISTEN); 4515 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4516 if (VDBG) log("listenForNetwork for " + nri); 4517 4518 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4519 return networkRequest; 4520 } 4521 4522 @Override 4523 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4524 PendingIntent operation) { 4525 checkNotNull(operation, "PendingIntent cannot be null."); 4526 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4527 enforceAccessPermission(); 4528 } 4529 ensureValidNetworkSpecifier(networkCapabilities); 4530 ensureSufficientPermissionsForRequest(networkCapabilities, 4531 Binder.getCallingPid(), Binder.getCallingUid()); 4532 4533 final NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities); 4534 restrictRequestUidsForCaller(nc); 4535 4536 NetworkRequest networkRequest = new NetworkRequest(nc, TYPE_NONE, nextNetworkRequestId(), 4537 NetworkRequest.Type.LISTEN); 4538 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4539 if (VDBG) log("pendingListenForNetwork for " + nri); 4540 4541 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4542 } 4543 4544 @Override 4545 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4546 ensureNetworkRequestHasType(networkRequest); 4547 mHandler.sendMessage(mHandler.obtainMessage( 4548 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4549 } 4550 4551 @Override 4552 public void registerNetworkFactory(Messenger messenger, String name) { 4553 enforceConnectivityInternalPermission(); 4554 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4555 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4556 } 4557 4558 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4559 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4560 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4561 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4562 } 4563 4564 @Override 4565 public void unregisterNetworkFactory(Messenger messenger) { 4566 enforceConnectivityInternalPermission(); 4567 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4568 } 4569 4570 private void handleUnregisterNetworkFactory(Messenger messenger) { 4571 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4572 if (nfi == null) { 4573 loge("Failed to find Messenger in unregisterNetworkFactory"); 4574 return; 4575 } 4576 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4577 } 4578 4579 /** 4580 * NetworkAgentInfo supporting a request by requestId. 4581 * These have already been vetted (their Capabilities satisfy the request) 4582 * and the are the highest scored network available. 4583 * the are keyed off the Requests requestId. 4584 */ 4585 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4586 @GuardedBy("mNetworkForRequestId") 4587 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4588 new SparseArray<NetworkAgentInfo>(); 4589 4590 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4591 @GuardedBy("mNetworkForNetId") 4592 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4593 new SparseArray<NetworkAgentInfo>(); 4594 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4595 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4596 // there may not be a strict 1:1 correlation between the two. 4597 @GuardedBy("mNetworkForNetId") 4598 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4599 4600 // NetworkAgentInfo keyed off its connecting messenger 4601 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4602 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4603 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4604 new HashMap<Messenger, NetworkAgentInfo>(); 4605 4606 @GuardedBy("mBlockedAppUids") 4607 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4608 4609 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4610 private final NetworkRequest mDefaultRequest; 4611 4612 // Request used to optionally keep mobile data active even when higher 4613 // priority networks like Wi-Fi are active. 4614 private final NetworkRequest mDefaultMobileDataRequest; 4615 4616 private NetworkAgentInfo getNetworkForRequest(int requestId) { 4617 synchronized (mNetworkForRequestId) { 4618 return mNetworkForRequestId.get(requestId); 4619 } 4620 } 4621 4622 private void clearNetworkForRequest(int requestId) { 4623 synchronized (mNetworkForRequestId) { 4624 mNetworkForRequestId.remove(requestId); 4625 } 4626 } 4627 4628 private void setNetworkForRequest(int requestId, NetworkAgentInfo nai) { 4629 synchronized (mNetworkForRequestId) { 4630 mNetworkForRequestId.put(requestId, nai); 4631 } 4632 } 4633 4634 private NetworkAgentInfo getDefaultNetwork() { 4635 return getNetworkForRequest(mDefaultRequest.requestId); 4636 } 4637 4638 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4639 return nai == getDefaultNetwork(); 4640 } 4641 4642 private boolean isDefaultRequest(NetworkRequestInfo nri) { 4643 return nri.request.requestId == mDefaultRequest.requestId; 4644 } 4645 4646 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4647 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4648 int currentScore, NetworkMisc networkMisc) { 4649 enforceConnectivityInternalPermission(); 4650 4651 LinkProperties lp = new LinkProperties(linkProperties); 4652 lp.ensureDirectlyConnectedRoutes(); 4653 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4654 // satisfies mDefaultRequest. 4655 final NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities); 4656 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4657 new Network(reserveNetId()), new NetworkInfo(networkInfo), lp, nc, currentScore, 4658 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4659 // Make sure the network capabilities reflect what the agent info says. 4660 nai.networkCapabilities = mixInCapabilities(nai, nc); 4661 synchronized (this) { 4662 nai.networkMonitor.systemReady = mSystemReady; 4663 } 4664 final String extraInfo = networkInfo.getExtraInfo(); 4665 final String name = TextUtils.isEmpty(extraInfo) 4666 ? nai.networkCapabilities.getSSID() : extraInfo; 4667 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, name); 4668 if (DBG) log("registerNetworkAgent " + nai); 4669 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4670 return nai.network.netId; 4671 } 4672 4673 private void handleRegisterNetworkAgent(NetworkAgentInfo nai) { 4674 if (VDBG) log("Got NetworkAgent Messenger"); 4675 mNetworkAgentInfos.put(nai.messenger, nai); 4676 synchronized (mNetworkForNetId) { 4677 mNetworkForNetId.put(nai.network.netId, nai); 4678 } 4679 nai.asyncChannel.connect(mContext, mTrackerHandler, nai.messenger); 4680 NetworkInfo networkInfo = nai.networkInfo; 4681 nai.networkInfo = null; 4682 updateNetworkInfo(nai, networkInfo); 4683 updateUids(nai, null, nai.networkCapabilities); 4684 } 4685 4686 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4687 LinkProperties newLp = new LinkProperties(networkAgent.linkProperties); 4688 int netId = networkAgent.network.netId; 4689 4690 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4691 // we do anything else, make sure its LinkProperties are accurate. 4692 if (networkAgent.clatd != null) { 4693 networkAgent.clatd.fixupLinkProperties(oldLp, newLp); 4694 } 4695 4696 updateInterfaces(newLp, oldLp, netId, networkAgent.networkCapabilities); 4697 updateMtu(newLp, oldLp); 4698 // TODO - figure out what to do for clat 4699 // for (LinkProperties lp : newLp.getStackedLinks()) { 4700 // updateMtu(lp, null); 4701 // } 4702 updateTcpBufferSizes(networkAgent); 4703 4704 updateRoutes(newLp, oldLp, netId); 4705 updateDnses(newLp, oldLp, netId); 4706 // Make sure LinkProperties represents the latest private DNS status. 4707 // This does not need to be done before updateDnses because the 4708 // LinkProperties are not the source of the private DNS configuration. 4709 // updateDnses will fetch the private DNS configuration from DnsManager. 4710 mDnsManager.updatePrivateDnsStatus(netId, newLp); 4711 4712 // Start or stop clat accordingly to network state. 4713 networkAgent.updateClat(mNetd); 4714 if (isDefaultNetwork(networkAgent)) { 4715 handleApplyDefaultProxy(newLp.getHttpProxy()); 4716 } else { 4717 updateProxy(newLp, oldLp, networkAgent); 4718 } 4719 // TODO - move this check to cover the whole function 4720 if (!Objects.equals(newLp, oldLp)) { 4721 synchronized (networkAgent) { 4722 networkAgent.linkProperties = newLp; 4723 } 4724 notifyIfacesChangedForNetworkStats(); 4725 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4726 } 4727 4728 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4729 } 4730 4731 private void wakeupModifyInterface(String iface, NetworkCapabilities caps, boolean add) { 4732 // Marks are only available on WiFi interaces. Checking for 4733 // marks on unsupported interfaces is harmless. 4734 if (!caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) { 4735 return; 4736 } 4737 4738 int mark = mContext.getResources().getInteger( 4739 com.android.internal.R.integer.config_networkWakeupPacketMark); 4740 int mask = mContext.getResources().getInteger( 4741 com.android.internal.R.integer.config_networkWakeupPacketMask); 4742 4743 // Mask/mark of zero will not detect anything interesting. 4744 // Don't install rules unless both values are nonzero. 4745 if (mark == 0 || mask == 0) { 4746 return; 4747 } 4748 4749 final String prefix = "iface:" + iface; 4750 try { 4751 if (add) { 4752 mNetd.getNetdService().wakeupAddInterface(iface, prefix, mark, mask); 4753 } else { 4754 mNetd.getNetdService().wakeupDelInterface(iface, prefix, mark, mask); 4755 } 4756 } catch (Exception e) { 4757 loge("Exception modifying wakeup packet monitoring: " + e); 4758 } 4759 4760 } 4761 4762 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId, 4763 NetworkCapabilities caps) { 4764 CompareResult<String> interfaceDiff = new CompareResult<String>( 4765 oldLp != null ? oldLp.getAllInterfaceNames() : null, 4766 newLp != null ? newLp.getAllInterfaceNames() : null); 4767 for (String iface : interfaceDiff.added) { 4768 try { 4769 if (DBG) log("Adding iface " + iface + " to network " + netId); 4770 mNetd.addInterfaceToNetwork(iface, netId); 4771 wakeupModifyInterface(iface, caps, true); 4772 } catch (Exception e) { 4773 loge("Exception adding interface: " + e); 4774 } 4775 } 4776 for (String iface : interfaceDiff.removed) { 4777 try { 4778 if (DBG) log("Removing iface " + iface + " from network " + netId); 4779 wakeupModifyInterface(iface, caps, false); 4780 mNetd.removeInterfaceFromNetwork(iface, netId); 4781 } catch (Exception e) { 4782 loge("Exception removing interface: " + e); 4783 } 4784 } 4785 } 4786 4787 /** 4788 * Have netd update routes from oldLp to newLp. 4789 * @return true if routes changed between oldLp and newLp 4790 */ 4791 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4792 // Compare the route diff to determine which routes should be added and removed. 4793 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>( 4794 oldLp != null ? oldLp.getAllRoutes() : null, 4795 newLp != null ? newLp.getAllRoutes() : null); 4796 4797 // add routes before removing old in case it helps with continuous connectivity 4798 4799 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4800 for (RouteInfo route : routeDiff.added) { 4801 if (route.hasGateway()) continue; 4802 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4803 try { 4804 mNetd.addRoute(netId, route); 4805 } catch (Exception e) { 4806 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4807 loge("Exception in addRoute for non-gateway: " + e); 4808 } 4809 } 4810 } 4811 for (RouteInfo route : routeDiff.added) { 4812 if (route.hasGateway() == false) continue; 4813 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4814 try { 4815 mNetd.addRoute(netId, route); 4816 } catch (Exception e) { 4817 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4818 loge("Exception in addRoute for gateway: " + e); 4819 } 4820 } 4821 } 4822 4823 for (RouteInfo route : routeDiff.removed) { 4824 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4825 try { 4826 mNetd.removeRoute(netId, route); 4827 } catch (Exception e) { 4828 loge("Exception in removeRoute: " + e); 4829 } 4830 } 4831 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4832 } 4833 4834 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4835 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4836 return; // no updating necessary 4837 } 4838 4839 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4840 final boolean isDefaultNetwork = (defaultNai != null && defaultNai.network.netId == netId); 4841 4842 if (DBG) { 4843 final Collection<InetAddress> dnses = newLp.getDnsServers(); 4844 log("Setting DNS servers for network " + netId + " to " + dnses); 4845 } 4846 try { 4847 mDnsManager.setDnsConfigurationForNetwork(netId, newLp, isDefaultNetwork); 4848 } catch (Exception e) { 4849 loge("Exception in setDnsConfigurationForNetwork: " + e); 4850 } 4851 } 4852 4853 private String getNetworkPermission(NetworkCapabilities nc) { 4854 // TODO: make these permission strings AIDL constants instead. 4855 if (!nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4856 return NetworkManagementService.PERMISSION_SYSTEM; 4857 } 4858 if (!nc.hasCapability(NET_CAPABILITY_FOREGROUND)) { 4859 return NetworkManagementService.PERMISSION_NETWORK; 4860 } 4861 return null; 4862 } 4863 4864 /** 4865 * Augments the NetworkCapabilities passed in by a NetworkAgent with capabilities that are 4866 * maintained here that the NetworkAgent is not aware of (e.g., validated, captive portal, 4867 * and foreground status). 4868 */ 4869 private NetworkCapabilities mixInCapabilities(NetworkAgentInfo nai, NetworkCapabilities nc) { 4870 // Once a NetworkAgent is connected, complain if some immutable capabilities are removed. 4871 // Don't complain for VPNs since they're not driven by requests and there is no risk of 4872 // causing a connect/teardown loop. 4873 // TODO: remove this altogether and make it the responsibility of the NetworkFactories to 4874 // avoid connect/teardown loops. 4875 if (nai.everConnected && 4876 !nai.isVPN() && 4877 !nai.networkCapabilities.satisfiedByImmutableNetworkCapabilities(nc)) { 4878 // TODO: consider not complaining when a network agent degrades its capabilities if this 4879 // does not cause any request (that is not a listen) currently matching that agent to 4880 // stop being matched by the updated agent. 4881 String diff = nai.networkCapabilities.describeImmutableDifferences(nc); 4882 if (!TextUtils.isEmpty(diff)) { 4883 Slog.wtf(TAG, "BUG: " + nai + " lost immutable capabilities:" + diff); 4884 } 4885 } 4886 4887 // Don't modify caller's NetworkCapabilities. 4888 NetworkCapabilities newNc = new NetworkCapabilities(nc); 4889 if (nai.lastValidated) { 4890 newNc.addCapability(NET_CAPABILITY_VALIDATED); 4891 } else { 4892 newNc.removeCapability(NET_CAPABILITY_VALIDATED); 4893 } 4894 if (nai.lastCaptivePortalDetected) { 4895 newNc.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4896 } else { 4897 newNc.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4898 } 4899 if (nai.isBackgroundNetwork()) { 4900 newNc.removeCapability(NET_CAPABILITY_FOREGROUND); 4901 } else { 4902 newNc.addCapability(NET_CAPABILITY_FOREGROUND); 4903 } 4904 if (nai.isSuspended()) { 4905 newNc.removeCapability(NET_CAPABILITY_NOT_SUSPENDED); 4906 } else { 4907 newNc.addCapability(NET_CAPABILITY_NOT_SUSPENDED); 4908 } 4909 4910 return newNc; 4911 } 4912 4913 /** 4914 * Update the NetworkCapabilities for {@code nai} to {@code nc}. Specifically: 4915 * 4916 * 1. Calls mixInCapabilities to merge the passed-in NetworkCapabilities {@code nc} with the 4917 * capabilities we manage and store in {@code nai}, such as validated status and captive 4918 * portal status) 4919 * 2. Takes action on the result: changes network permissions, sends CAP_CHANGED callbacks, and 4920 * potentially triggers rematches. 4921 * 3. Directly informs other network stack components (NetworkStatsService, VPNs, etc. of the 4922 * change.) 4923 * 4924 * @param oldScore score of the network before any of the changes that prompted us 4925 * to call this function. 4926 * @param nai the network having its capabilities updated. 4927 * @param nc the new network capabilities. 4928 */ 4929 private void updateCapabilities(int oldScore, NetworkAgentInfo nai, NetworkCapabilities nc) { 4930 NetworkCapabilities newNc = mixInCapabilities(nai, nc); 4931 4932 if (Objects.equals(nai.networkCapabilities, newNc)) return; 4933 4934 final String oldPermission = getNetworkPermission(nai.networkCapabilities); 4935 final String newPermission = getNetworkPermission(newNc); 4936 if (!Objects.equals(oldPermission, newPermission) && nai.created && !nai.isVPN()) { 4937 try { 4938 mNetd.setNetworkPermission(nai.network.netId, newPermission); 4939 } catch (RemoteException e) { 4940 loge("Exception in setNetworkPermission: " + e); 4941 } 4942 } 4943 4944 final NetworkCapabilities prevNc; 4945 synchronized (nai) { 4946 prevNc = nai.networkCapabilities; 4947 nai.networkCapabilities = newNc; 4948 } 4949 4950 updateUids(nai, prevNc, newNc); 4951 4952 if (nai.getCurrentScore() == oldScore && newNc.equalRequestableCapabilities(prevNc)) { 4953 // If the requestable capabilities haven't changed, and the score hasn't changed, then 4954 // the change we're processing can't affect any requests, it can only affect the listens 4955 // on this network. We might have been called by rematchNetworkAndRequests when a 4956 // network changed foreground state. 4957 processListenRequests(nai, true); 4958 } else { 4959 // If the requestable capabilities have changed or the score changed, we can't have been 4960 // called by rematchNetworkAndRequests, so it's safe to start a rematch. 4961 rematchAllNetworksAndRequests(nai, oldScore); 4962 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4963 } 4964 4965 // Report changes that are interesting for network statistics tracking. 4966 if (prevNc != null) { 4967 final boolean meteredChanged = prevNc.hasCapability(NET_CAPABILITY_NOT_METERED) != 4968 newNc.hasCapability(NET_CAPABILITY_NOT_METERED); 4969 final boolean roamingChanged = prevNc.hasCapability(NET_CAPABILITY_NOT_ROAMING) != 4970 newNc.hasCapability(NET_CAPABILITY_NOT_ROAMING); 4971 if (meteredChanged || roamingChanged) { 4972 notifyIfacesChangedForNetworkStats(); 4973 } 4974 } 4975 4976 if (!newNc.hasTransport(TRANSPORT_VPN)) { 4977 // Tell VPNs about updated capabilities, since they may need to 4978 // bubble those changes through. 4979 updateAllVpnsCapabilities(); 4980 } 4981 } 4982 4983 private void updateUids(NetworkAgentInfo nai, NetworkCapabilities prevNc, 4984 NetworkCapabilities newNc) { 4985 Set<UidRange> prevRanges = null == prevNc ? null : prevNc.getUids(); 4986 Set<UidRange> newRanges = null == newNc ? null : newNc.getUids(); 4987 if (null == prevRanges) prevRanges = new ArraySet<>(); 4988 if (null == newRanges) newRanges = new ArraySet<>(); 4989 final Set<UidRange> prevRangesCopy = new ArraySet<>(prevRanges); 4990 4991 prevRanges.removeAll(newRanges); 4992 newRanges.removeAll(prevRangesCopy); 4993 4994 try { 4995 if (!newRanges.isEmpty()) { 4996 final UidRange[] addedRangesArray = new UidRange[newRanges.size()]; 4997 newRanges.toArray(addedRangesArray); 4998 mNetd.addVpnUidRanges(nai.network.netId, addedRangesArray); 4999 } 5000 if (!prevRanges.isEmpty()) { 5001 final UidRange[] removedRangesArray = new UidRange[prevRanges.size()]; 5002 prevRanges.toArray(removedRangesArray); 5003 mNetd.removeVpnUidRanges(nai.network.netId, removedRangesArray); 5004 } 5005 } catch (Exception e) { 5006 // Never crash! 5007 loge("Exception in updateUids: " + e); 5008 } 5009 } 5010 5011 public void handleUpdateLinkProperties(NetworkAgentInfo nai, LinkProperties newLp) { 5012 if (getNetworkAgentInfoForNetId(nai.network.netId) != nai) { 5013 // Ignore updates for disconnected networks 5014 return; 5015 } 5016 // newLp is already a defensive copy. 5017 newLp.ensureDirectlyConnectedRoutes(); 5018 if (VDBG) { 5019 log("Update of LinkProperties for " + nai.name() + 5020 "; created=" + nai.created + 5021 "; everConnected=" + nai.everConnected); 5022 } 5023 LinkProperties oldLp = nai.linkProperties; 5024 synchronized (nai) { 5025 nai.linkProperties = newLp; 5026 } 5027 if (nai.everConnected) { 5028 updateLinkProperties(nai, oldLp); 5029 } 5030 } 5031 5032 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 5033 for (int i = 0; i < nai.numNetworkRequests(); i++) { 5034 NetworkRequest nr = nai.requestAt(i); 5035 // Don't send listening requests to factories. b/17393458 5036 if (nr.isListen()) continue; 5037 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 5038 } 5039 } 5040 5041 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 5042 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 5043 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 5044 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 5045 networkRequest); 5046 } 5047 } 5048 5049 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 5050 int notificationType) { 5051 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 5052 Intent intent = new Intent(); 5053 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 5054 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 5055 nri.mPendingIntentSent = true; 5056 sendIntent(nri.mPendingIntent, intent); 5057 } 5058 // else not handled 5059 } 5060 5061 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 5062 mPendingIntentWakeLock.acquire(); 5063 try { 5064 if (DBG) log("Sending " + pendingIntent); 5065 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 5066 } catch (PendingIntent.CanceledException e) { 5067 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 5068 mPendingIntentWakeLock.release(); 5069 releasePendingNetworkRequest(pendingIntent); 5070 } 5071 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 5072 } 5073 5074 @Override 5075 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 5076 String resultData, Bundle resultExtras) { 5077 if (DBG) log("Finished sending " + pendingIntent); 5078 mPendingIntentWakeLock.release(); 5079 // Release with a delay so the receiving client has an opportunity to put in its 5080 // own request. 5081 releasePendingNetworkRequestWithDelay(pendingIntent); 5082 } 5083 5084 private void callCallbackForRequest(NetworkRequestInfo nri, 5085 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 5086 if (nri.messenger == null) { 5087 return; // Default request has no msgr 5088 } 5089 Bundle bundle = new Bundle(); 5090 // TODO: check if defensive copies of data is needed. 5091 putParcelable(bundle, new NetworkRequest(nri.request)); 5092 Message msg = Message.obtain(); 5093 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL) { 5094 putParcelable(bundle, networkAgent.network); 5095 } 5096 switch (notificationType) { 5097 case ConnectivityManager.CALLBACK_AVAILABLE: { 5098 putParcelable(bundle, new NetworkCapabilities(networkAgent.networkCapabilities)); 5099 putParcelable(bundle, new LinkProperties(networkAgent.linkProperties)); 5100 break; 5101 } 5102 case ConnectivityManager.CALLBACK_LOSING: { 5103 msg.arg1 = arg1; 5104 break; 5105 } 5106 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 5107 // networkAgent can't be null as it has been accessed a few lines above. 5108 final NetworkCapabilities nc = networkCapabilitiesRestrictedForCallerPermissions( 5109 networkAgent.networkCapabilities, nri.mPid, nri.mUid); 5110 putParcelable(bundle, nc); 5111 break; 5112 } 5113 case ConnectivityManager.CALLBACK_IP_CHANGED: { 5114 putParcelable(bundle, new LinkProperties(networkAgent.linkProperties)); 5115 break; 5116 } 5117 } 5118 msg.what = notificationType; 5119 msg.setData(bundle); 5120 try { 5121 if (VDBG) { 5122 String notification = ConnectivityManager.getCallbackName(notificationType); 5123 log("sending notification " + notification + " for " + nri.request); 5124 } 5125 nri.messenger.send(msg); 5126 } catch (RemoteException e) { 5127 // may occur naturally in the race of binder death. 5128 loge("RemoteException caught trying to send a callback msg for " + nri.request); 5129 } 5130 } 5131 5132 private static <T extends Parcelable> void putParcelable(Bundle bundle, T t) { 5133 bundle.putParcelable(t.getClass().getSimpleName(), t); 5134 } 5135 5136 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 5137 if (nai.numRequestNetworkRequests() != 0) { 5138 for (int i = 0; i < nai.numNetworkRequests(); i++) { 5139 NetworkRequest nr = nai.requestAt(i); 5140 // Ignore listening requests. 5141 if (nr.isListen()) continue; 5142 loge("Dead network still had at least " + nr); 5143 break; 5144 } 5145 } 5146 nai.asyncChannel.disconnect(); 5147 } 5148 5149 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 5150 if (oldNetwork == null) { 5151 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 5152 return; 5153 } 5154 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 5155 5156 // If we get here it means that the last linger timeout for this network expired. So there 5157 // must be no other active linger timers, and we must stop lingering. 5158 oldNetwork.clearLingerState(); 5159 5160 if (unneeded(oldNetwork, UnneededFor.TEARDOWN)) { 5161 // Tear the network down. 5162 teardownUnneededNetwork(oldNetwork); 5163 } else { 5164 // Put the network in the background. 5165 updateCapabilities(oldNetwork.getCurrentScore(), oldNetwork, 5166 oldNetwork.networkCapabilities); 5167 } 5168 } 5169 5170 private void makeDefault(NetworkAgentInfo newNetwork) { 5171 if (DBG) log("Switching to new default network: " + newNetwork); 5172 setupDataActivityTracking(newNetwork); 5173 try { 5174 mNetd.setDefaultNetId(newNetwork.network.netId); 5175 } catch (Exception e) { 5176 loge("Exception setting default network :" + e); 5177 } 5178 5179 notifyLockdownVpn(newNetwork); 5180 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 5181 updateTcpBufferSizes(newNetwork); 5182 mDnsManager.setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 5183 notifyIfacesChangedForNetworkStats(); 5184 } 5185 5186 private void processListenRequests(NetworkAgentInfo nai, boolean capabilitiesChanged) { 5187 // For consistency with previous behaviour, send onLost callbacks before onAvailable. 5188 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 5189 NetworkRequest nr = nri.request; 5190 if (!nr.isListen()) continue; 5191 if (nai.isSatisfyingRequest(nr.requestId) && !nai.satisfies(nr)) { 5192 nai.removeRequest(nri.request.requestId); 5193 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_LOST, 0); 5194 } 5195 } 5196 5197 if (capabilitiesChanged) { 5198 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 5199 } 5200 5201 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 5202 NetworkRequest nr = nri.request; 5203 if (!nr.isListen()) continue; 5204 if (nai.satisfies(nr) && !nai.isSatisfyingRequest(nr.requestId)) { 5205 nai.addRequest(nr); 5206 notifyNetworkAvailable(nai, nri); 5207 } 5208 } 5209 } 5210 5211 // Handles a network appearing or improving its score. 5212 // 5213 // - Evaluates all current NetworkRequests that can be 5214 // satisfied by newNetwork, and reassigns to newNetwork 5215 // any such requests for which newNetwork is the best. 5216 // 5217 // - Lingers any validated Networks that as a result are no longer 5218 // needed. A network is needed if it is the best network for 5219 // one or more NetworkRequests, or if it is a VPN. 5220 // 5221 // - Tears down newNetwork if it just became validated 5222 // but turns out to be unneeded. 5223 // 5224 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 5225 // networks that have no chance (i.e. even if validated) 5226 // of becoming the highest scoring network. 5227 // 5228 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 5229 // it does not remove NetworkRequests that other Networks could better satisfy. 5230 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 5231 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 5232 // as it performs better by a factor of the number of Networks. 5233 // 5234 // @param newNetwork is the network to be matched against NetworkRequests. 5235 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 5236 // performed to tear down unvalidated networks that have no chance (i.e. even if 5237 // validated) of becoming the highest scoring network. 5238 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 5239 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 5240 if (!newNetwork.everConnected) return; 5241 boolean keep = newNetwork.isVPN(); 5242 boolean isNewDefault = false; 5243 NetworkAgentInfo oldDefaultNetwork = null; 5244 5245 final boolean wasBackgroundNetwork = newNetwork.isBackgroundNetwork(); 5246 final int score = newNetwork.getCurrentScore(); 5247 5248 if (VDBG) log("rematching " + newNetwork.name()); 5249 5250 // Find and migrate to this Network any NetworkRequests for 5251 // which this network is now the best. 5252 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 5253 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 5254 NetworkCapabilities nc = newNetwork.networkCapabilities; 5255 if (VDBG) log(" network has: " + nc); 5256 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 5257 // Process requests in the first pass and listens in the second pass. This allows us to 5258 // change a network's capabilities depending on which requests it has. This is only 5259 // correct if the change in capabilities doesn't affect whether the network satisfies 5260 // requests or not, and doesn't affect the network's score. 5261 if (nri.request.isListen()) continue; 5262 5263 final NetworkAgentInfo currentNetwork = getNetworkForRequest(nri.request.requestId); 5264 final boolean satisfies = newNetwork.satisfies(nri.request); 5265 if (newNetwork == currentNetwork && satisfies) { 5266 if (VDBG) { 5267 log("Network " + newNetwork.name() + " was already satisfying" + 5268 " request " + nri.request.requestId + ". No change."); 5269 } 5270 keep = true; 5271 continue; 5272 } 5273 5274 // check if it satisfies the NetworkCapabilities 5275 if (VDBG) log(" checking if request is satisfied: " + nri.request); 5276 if (satisfies) { 5277 // next check if it's better than any current network we're using for 5278 // this request 5279 if (VDBG) { 5280 log("currentScore = " + 5281 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 5282 ", newScore = " + score); 5283 } 5284 if (currentNetwork == null || currentNetwork.getCurrentScore() < score) { 5285 if (VDBG) log("rematch for " + newNetwork.name()); 5286 if (currentNetwork != null) { 5287 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 5288 currentNetwork.removeRequest(nri.request.requestId); 5289 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 5290 affectedNetworks.add(currentNetwork); 5291 } else { 5292 if (VDBG) log(" accepting network in place of null"); 5293 } 5294 newNetwork.unlingerRequest(nri.request); 5295 setNetworkForRequest(nri.request.requestId, newNetwork); 5296 if (!newNetwork.addRequest(nri.request)) { 5297 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 5298 } 5299 addedRequests.add(nri); 5300 keep = true; 5301 // Tell NetworkFactories about the new score, so they can stop 5302 // trying to connect if they know they cannot match it. 5303 // TODO - this could get expensive if we have alot of requests for this 5304 // network. Think about if there is a way to reduce this. Push 5305 // netid->request mapping to each factory? 5306 sendUpdatedScoreToFactories(nri.request, score); 5307 if (isDefaultRequest(nri)) { 5308 isNewDefault = true; 5309 oldDefaultNetwork = currentNetwork; 5310 if (currentNetwork != null) { 5311 mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork); 5312 } 5313 } 5314 } 5315 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 5316 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 5317 // mark it as no longer satisfying "nri". Because networks are processed by 5318 // rematchAllNetworksAndRequests() in descending score order, "currentNetwork" will 5319 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 5320 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 5321 // This means this code doesn't have to handle the case where "currentNetwork" no 5322 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 5323 if (DBG) { 5324 log("Network " + newNetwork.name() + " stopped satisfying" + 5325 " request " + nri.request.requestId); 5326 } 5327 newNetwork.removeRequest(nri.request.requestId); 5328 if (currentNetwork == newNetwork) { 5329 clearNetworkForRequest(nri.request.requestId); 5330 sendUpdatedScoreToFactories(nri.request, 0); 5331 } else { 5332 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 5333 newNetwork.name() + 5334 " without updating mNetworkForRequestId or factories!"); 5335 } 5336 // TODO: Technically, sending CALLBACK_LOST here is 5337 // incorrect if there is a replacement network currently 5338 // connected that can satisfy nri, which is a request 5339 // (not a listen). However, the only capability that can both 5340 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 5341 // so this code is only incorrect for a network that loses 5342 // the TRUSTED capability, which is a rare case. 5343 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 5344 } 5345 } 5346 if (isNewDefault) { 5347 // Notify system services that this network is up. 5348 makeDefault(newNetwork); 5349 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 5350 metricsLogger().defaultNetworkMetrics().logDefaultNetworkEvent( 5351 now, newNetwork, oldDefaultNetwork); 5352 // Have a new default network, release the transition wakelock in 5353 scheduleReleaseNetworkTransitionWakelock(); 5354 } 5355 5356 if (!newNetwork.networkCapabilities.equalRequestableCapabilities(nc)) { 5357 Slog.wtf(TAG, String.format( 5358 "BUG: %s changed requestable capabilities during rematch: %s -> %s", 5359 newNetwork.name(), nc, newNetwork.networkCapabilities)); 5360 } 5361 if (newNetwork.getCurrentScore() != score) { 5362 Slog.wtf(TAG, String.format( 5363 "BUG: %s changed score during rematch: %d -> %d", 5364 newNetwork.name(), score, newNetwork.getCurrentScore())); 5365 } 5366 5367 // Second pass: process all listens. 5368 if (wasBackgroundNetwork != newNetwork.isBackgroundNetwork()) { 5369 // If the network went from background to foreground or vice versa, we need to update 5370 // its foreground state. It is safe to do this after rematching the requests because 5371 // NET_CAPABILITY_FOREGROUND does not affect requests, as is not a requestable 5372 // capability and does not affect the network's score (see the Slog.wtf call above). 5373 updateCapabilities(score, newNetwork, newNetwork.networkCapabilities); 5374 } else { 5375 processListenRequests(newNetwork, false); 5376 } 5377 5378 // do this after the default net is switched, but 5379 // before LegacyTypeTracker sends legacy broadcasts 5380 for (NetworkRequestInfo nri : addedRequests) notifyNetworkAvailable(newNetwork, nri); 5381 5382 // Linger any networks that are no longer needed. This should be done after sending the 5383 // available callback for newNetwork. 5384 for (NetworkAgentInfo nai : affectedNetworks) { 5385 updateLingerState(nai, now); 5386 } 5387 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 5388 // does not need to be done in any particular order. 5389 updateLingerState(newNetwork, now); 5390 5391 if (isNewDefault) { 5392 // Maintain the illusion: since the legacy API only 5393 // understands one network at a time, we must pretend 5394 // that the current default network disconnected before 5395 // the new one connected. 5396 if (oldDefaultNetwork != null) { 5397 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 5398 oldDefaultNetwork, true); 5399 } 5400 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 5401 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 5402 notifyLockdownVpn(newNetwork); 5403 } 5404 5405 if (keep) { 5406 // Notify battery stats service about this network, both the normal 5407 // interface and any stacked links. 5408 // TODO: Avoid redoing this; this must only be done once when a network comes online. 5409 try { 5410 final IBatteryStats bs = BatteryStatsService.getService(); 5411 final int type = newNetwork.networkInfo.getType(); 5412 5413 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 5414 bs.noteNetworkInterfaceType(baseIface, type); 5415 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 5416 final String stackedIface = stacked.getInterfaceName(); 5417 bs.noteNetworkInterfaceType(stackedIface, type); 5418 } 5419 } catch (RemoteException ignored) { 5420 } 5421 5422 // This has to happen after the notifyNetworkCallbacks as that tickles each 5423 // ConnectivityManager instance so that legacy requests correctly bind dns 5424 // requests to this network. The legacy users are listening for this bcast 5425 // and will generally do a dns request so they can ensureRouteToHost and if 5426 // they do that before the callbacks happen they'll use the default network. 5427 // 5428 // TODO: Is there still a race here? We send the broadcast 5429 // after sending the callback, but if the app can receive the 5430 // broadcast before the callback, it might still break. 5431 // 5432 // This *does* introduce a race where if the user uses the new api 5433 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 5434 // they may get old info. Reverse this after the old startUsing api is removed. 5435 // This is on top of the multiple intent sequencing referenced in the todo above. 5436 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 5437 NetworkRequest nr = newNetwork.requestAt(i); 5438 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 5439 // legacy type tracker filters out repeat adds 5440 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 5441 } 5442 } 5443 5444 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 5445 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 5446 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 5447 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 5448 if (newNetwork.isVPN()) { 5449 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 5450 } 5451 } 5452 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 5453 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 5454 if (unneeded(nai, UnneededFor.TEARDOWN)) { 5455 if (nai.getLingerExpiry() > 0) { 5456 // This network has active linger timers and no requests, but is not 5457 // lingering. Linger it. 5458 // 5459 // One way (the only way?) this can happen if this network is unvalidated 5460 // and became unneeded due to another network improving its score to the 5461 // point where this network will no longer be able to satisfy any requests 5462 // even if it validates. 5463 updateLingerState(nai, now); 5464 } else { 5465 if (DBG) log("Reaping " + nai.name()); 5466 teardownUnneededNetwork(nai); 5467 } 5468 } 5469 } 5470 } 5471 } 5472 5473 /** 5474 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 5475 * being disconnected. 5476 * @param changed If only one Network's score or capabilities have been modified since the last 5477 * time this function was called, pass this Network in this argument, otherwise pass 5478 * null. 5479 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 5480 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 5481 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 5482 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 5483 * network's score. 5484 */ 5485 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 5486 // TODO: This may get slow. The "changed" parameter is provided for future optimization 5487 // to avoid the slowness. It is not simply enough to process just "changed", for 5488 // example in the case where "changed"'s score decreases and another network should begin 5489 // satifying a NetworkRequest that "changed" currently satisfies. 5490 5491 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 5492 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 5493 // rematchNetworkAndRequests() handles. 5494 final long now = SystemClock.elapsedRealtime(); 5495 if (changed != null && oldScore < changed.getCurrentScore()) { 5496 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 5497 } else { 5498 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 5499 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 5500 // Rematch higher scoring networks first to prevent requests first matching a lower 5501 // scoring network and then a higher scoring network, which could produce multiple 5502 // callbacks and inadvertently unlinger networks. 5503 Arrays.sort(nais); 5504 for (NetworkAgentInfo nai : nais) { 5505 rematchNetworkAndRequests(nai, 5506 // Only reap the last time through the loop. Reaping before all rematching 5507 // is complete could incorrectly teardown a network that hasn't yet been 5508 // rematched. 5509 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 5510 : ReapUnvalidatedNetworks.REAP, 5511 now); 5512 } 5513 } 5514 } 5515 5516 private void updateInetCondition(NetworkAgentInfo nai) { 5517 // Don't bother updating until we've graduated to validated at least once. 5518 if (!nai.everValidated) return; 5519 // For now only update icons for default connection. 5520 // TODO: Update WiFi and cellular icons separately. b/17237507 5521 if (!isDefaultNetwork(nai)) return; 5522 5523 int newInetCondition = nai.lastValidated ? 100 : 0; 5524 // Don't repeat publish. 5525 if (newInetCondition == mDefaultInetConditionPublished) return; 5526 5527 mDefaultInetConditionPublished = newInetCondition; 5528 sendInetConditionBroadcast(nai.networkInfo); 5529 } 5530 5531 private void notifyLockdownVpn(NetworkAgentInfo nai) { 5532 synchronized (mVpns) { 5533 if (mLockdownTracker != null) { 5534 if (nai != null && nai.isVPN()) { 5535 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 5536 } else { 5537 mLockdownTracker.onNetworkInfoChanged(); 5538 } 5539 } 5540 } 5541 } 5542 5543 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 5544 final NetworkInfo.State state = newInfo.getState(); 5545 NetworkInfo oldInfo = null; 5546 final int oldScore = networkAgent.getCurrentScore(); 5547 synchronized (networkAgent) { 5548 oldInfo = networkAgent.networkInfo; 5549 networkAgent.networkInfo = newInfo; 5550 } 5551 notifyLockdownVpn(networkAgent); 5552 5553 if (DBG) { 5554 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 5555 (oldInfo == null ? "null" : oldInfo.getState()) + 5556 " to " + state); 5557 } 5558 5559 if (!networkAgent.created 5560 && (state == NetworkInfo.State.CONNECTED 5561 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 5562 5563 // A network that has just connected has zero requests and is thus a foreground network. 5564 networkAgent.networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 5565 5566 try { 5567 // This should never fail. Specifying an already in use NetID will cause failure. 5568 if (networkAgent.isVPN()) { 5569 mNetd.createVirtualNetwork(networkAgent.network.netId, 5570 !networkAgent.linkProperties.getDnsServers().isEmpty(), 5571 (networkAgent.networkMisc == null || 5572 !networkAgent.networkMisc.allowBypass)); 5573 } else { 5574 mNetd.createPhysicalNetwork(networkAgent.network.netId, 5575 getNetworkPermission(networkAgent.networkCapabilities)); 5576 } 5577 } catch (Exception e) { 5578 loge("Error creating network " + networkAgent.network.netId + ": " 5579 + e.getMessage()); 5580 return; 5581 } 5582 networkAgent.created = true; 5583 } 5584 5585 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 5586 networkAgent.everConnected = true; 5587 5588 handlePerNetworkPrivateDnsConfig(networkAgent, mDnsManager.getPrivateDnsConfig()); 5589 updateLinkProperties(networkAgent, null); 5590 notifyIfacesChangedForNetworkStats(); 5591 5592 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 5593 scheduleUnvalidatedPrompt(networkAgent); 5594 5595 if (networkAgent.isVPN()) { 5596 // Temporarily disable the default proxy (not global). 5597 synchronized (mProxyLock) { 5598 if (!mDefaultProxyDisabled) { 5599 mDefaultProxyDisabled = true; 5600 if (mGlobalProxy == null && mDefaultProxy != null) { 5601 sendProxyBroadcast(null); 5602 } 5603 } 5604 } 5605 // TODO: support proxy per network. 5606 } 5607 5608 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5609 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5610 // capabilities, so it only needs to be done once on initial connect, not every time the 5611 // network's capabilities change. Note that we do this before rematching the network, 5612 // so we could decide to tear it down immediately afterwards. That's fine though - on 5613 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5614 // doing. 5615 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5616 5617 // Consider network even though it is not yet validated. 5618 final long now = SystemClock.elapsedRealtime(); 5619 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5620 5621 // This has to happen after matching the requests, because callbacks are just requests. 5622 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5623 } else if (state == NetworkInfo.State.DISCONNECTED) { 5624 networkAgent.asyncChannel.disconnect(); 5625 if (networkAgent.isVPN()) { 5626 synchronized (mProxyLock) { 5627 if (mDefaultProxyDisabled) { 5628 mDefaultProxyDisabled = false; 5629 if (mGlobalProxy == null && mDefaultProxy != null) { 5630 sendProxyBroadcast(mDefaultProxy); 5631 } 5632 } 5633 } 5634 updateUids(networkAgent, networkAgent.networkCapabilities, null); 5635 } 5636 disconnectAndDestroyNetwork(networkAgent); 5637 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5638 state == NetworkInfo.State.SUSPENDED) { 5639 // going into or coming out of SUSPEND: rescore and notify 5640 if (networkAgent.getCurrentScore() != oldScore) { 5641 rematchAllNetworksAndRequests(networkAgent, oldScore); 5642 } 5643 updateCapabilities(networkAgent.getCurrentScore(), networkAgent, 5644 networkAgent.networkCapabilities); 5645 // TODO (b/73132094) : remove this call once the few users of onSuspended and 5646 // onResumed have been removed. 5647 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5648 ConnectivityManager.CALLBACK_SUSPENDED : 5649 ConnectivityManager.CALLBACK_RESUMED)); 5650 mLegacyTypeTracker.update(networkAgent); 5651 } 5652 } 5653 5654 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5655 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5656 if (score < 0) { 5657 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5658 "). Bumping score to min of 0"); 5659 score = 0; 5660 } 5661 5662 final int oldScore = nai.getCurrentScore(); 5663 nai.setCurrentScore(score); 5664 5665 rematchAllNetworksAndRequests(nai, oldScore); 5666 5667 sendUpdatedScoreToFactories(nai); 5668 } 5669 5670 // Notify only this one new request of the current state. Transfer all the 5671 // current state by calling NetworkCapabilities and LinkProperties callbacks 5672 // so that callers can be guaranteed to have as close to atomicity in state 5673 // transfer as can be supported by this current API. 5674 protected void notifyNetworkAvailable(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5675 mHandler.removeMessages(EVENT_TIMEOUT_NETWORK_REQUEST, nri); 5676 if (nri.mPendingIntent != null) { 5677 sendPendingIntentForRequest(nri, nai, ConnectivityManager.CALLBACK_AVAILABLE); 5678 // Attempt no subsequent state pushes where intents are involved. 5679 return; 5680 } 5681 5682 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_AVAILABLE, 0); 5683 } 5684 5685 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5686 // The NetworkInfo we actually send out has no bearing on the real 5687 // state of affairs. For example, if the default connection is mobile, 5688 // and a request for HIPRI has just gone away, we need to pretend that 5689 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5690 // the state to DISCONNECTED, even though the network is of type MOBILE 5691 // and is still connected. 5692 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5693 info.setType(type); 5694 if (state != DetailedState.DISCONNECTED) { 5695 info.setDetailedState(state, null, info.getExtraInfo()); 5696 sendConnectedBroadcast(info); 5697 } else { 5698 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5699 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5700 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5701 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5702 if (info.isFailover()) { 5703 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5704 nai.networkInfo.setFailover(false); 5705 } 5706 if (info.getReason() != null) { 5707 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5708 } 5709 if (info.getExtraInfo() != null) { 5710 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5711 } 5712 NetworkAgentInfo newDefaultAgent = null; 5713 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5714 newDefaultAgent = getDefaultNetwork(); 5715 if (newDefaultAgent != null) { 5716 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5717 newDefaultAgent.networkInfo); 5718 } else { 5719 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5720 } 5721 } 5722 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5723 mDefaultInetConditionPublished); 5724 sendStickyBroadcast(intent); 5725 if (newDefaultAgent != null) { 5726 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5727 } 5728 } 5729 } 5730 5731 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5732 if (VDBG) { 5733 String notification = ConnectivityManager.getCallbackName(notifyType); 5734 log("notifyType " + notification + " for " + networkAgent.name()); 5735 } 5736 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5737 NetworkRequest nr = networkAgent.requestAt(i); 5738 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5739 if (VDBG) log(" sending notification for " + nr); 5740 // TODO: if we're in the middle of a rematch, can we send a CAP_CHANGED callback for 5741 // a network that no longer satisfies the listen? 5742 if (nri.mPendingIntent == null) { 5743 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5744 } else { 5745 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5746 } 5747 } 5748 } 5749 5750 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5751 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5752 } 5753 5754 /** 5755 * Returns the list of all interfaces that could be used by network traffic that does not 5756 * explicitly specify a network. This includes the default network, but also all VPNs that are 5757 * currently connected. 5758 * 5759 * Must be called on the handler thread. 5760 */ 5761 private Network[] getDefaultNetworks() { 5762 ArrayList<Network> defaultNetworks = new ArrayList<>(); 5763 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 5764 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 5765 if (nai.everConnected && (nai == defaultNetwork || nai.isVPN())) { 5766 defaultNetworks.add(nai.network); 5767 } 5768 } 5769 return defaultNetworks.toArray(new Network[0]); 5770 } 5771 5772 /** 5773 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5774 * properties tracked by NetworkStatsService on an active iface has changed. 5775 */ 5776 private void notifyIfacesChangedForNetworkStats() { 5777 try { 5778 mStatsService.forceUpdateIfaces(getDefaultNetworks()); 5779 } catch (Exception ignored) { 5780 } 5781 } 5782 5783 @Override 5784 public boolean addVpnAddress(String address, int prefixLength) { 5785 int user = UserHandle.getUserId(Binder.getCallingUid()); 5786 synchronized (mVpns) { 5787 throwIfLockdownEnabled(); 5788 return mVpns.get(user).addAddress(address, prefixLength); 5789 } 5790 } 5791 5792 @Override 5793 public boolean removeVpnAddress(String address, int prefixLength) { 5794 int user = UserHandle.getUserId(Binder.getCallingUid()); 5795 synchronized (mVpns) { 5796 throwIfLockdownEnabled(); 5797 return mVpns.get(user).removeAddress(address, prefixLength); 5798 } 5799 } 5800 5801 @Override 5802 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5803 int user = UserHandle.getUserId(Binder.getCallingUid()); 5804 final boolean success; 5805 synchronized (mVpns) { 5806 throwIfLockdownEnabled(); 5807 success = mVpns.get(user).setUnderlyingNetworks(networks); 5808 } 5809 if (success) { 5810 mHandler.post(() -> notifyIfacesChangedForNetworkStats()); 5811 } 5812 return success; 5813 } 5814 5815 @Override 5816 public String getCaptivePortalServerUrl() { 5817 enforceConnectivityInternalPermission(); 5818 return NetworkMonitor.getCaptivePortalServerHttpUrl(mContext); 5819 } 5820 5821 @Override 5822 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5823 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5824 enforceKeepalivePermission(); 5825 mKeepaliveTracker.startNattKeepalive( 5826 getNetworkAgentInfoForNetwork(network), 5827 intervalSeconds, messenger, binder, 5828 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5829 } 5830 5831 @Override 5832 public void stopKeepalive(Network network, int slot) { 5833 mHandler.sendMessage(mHandler.obtainMessage( 5834 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5835 } 5836 5837 @Override 5838 public void factoryReset() { 5839 enforceConnectivityInternalPermission(); 5840 5841 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5842 return; 5843 } 5844 5845 final int userId = UserHandle.getCallingUserId(); 5846 5847 // Turn airplane mode off 5848 setAirplaneMode(false); 5849 5850 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5851 // Untether 5852 String pkgName = mContext.getOpPackageName(); 5853 for (String tether : getTetheredIfaces()) { 5854 untether(tether, pkgName); 5855 } 5856 } 5857 5858 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5859 // Remove always-on package 5860 synchronized (mVpns) { 5861 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5862 if (alwaysOnPackage != null) { 5863 setAlwaysOnVpnPackage(userId, null, false); 5864 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5865 } 5866 5867 // Turn Always-on VPN off 5868 if (mLockdownEnabled && userId == UserHandle.USER_SYSTEM) { 5869 final long ident = Binder.clearCallingIdentity(); 5870 try { 5871 mKeyStore.delete(Credentials.LOCKDOWN_VPN); 5872 mLockdownEnabled = false; 5873 setLockdownTracker(null); 5874 } finally { 5875 Binder.restoreCallingIdentity(ident); 5876 } 5877 } 5878 5879 // Turn VPN off 5880 VpnConfig vpnConfig = getVpnConfig(userId); 5881 if (vpnConfig != null) { 5882 if (vpnConfig.legacy) { 5883 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5884 } else { 5885 // Prevent this app (packagename = vpnConfig.user) from initiating 5886 // VPN connections in the future without user intervention. 5887 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5888 5889 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5890 } 5891 } 5892 } 5893 } 5894 5895 Settings.Global.putString(mContext.getContentResolver(), 5896 Settings.Global.NETWORK_AVOID_BAD_WIFI, null); 5897 } 5898 5899 @Override 5900 public byte[] getNetworkWatchlistConfigHash() { 5901 NetworkWatchlistManager nwm = mContext.getSystemService(NetworkWatchlistManager.class); 5902 if (nwm == null) { 5903 loge("Unable to get NetworkWatchlistManager"); 5904 return null; 5905 } 5906 // Redirect it to network watchlist service to access watchlist file and calculate hash. 5907 return nwm.getWatchlistConfigHash(); 5908 } 5909 5910 @VisibleForTesting 5911 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5912 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5913 return new NetworkMonitor(context, handler, nai, defaultRequest); 5914 } 5915 5916 @VisibleForTesting 5917 MultinetworkPolicyTracker createMultinetworkPolicyTracker(Context c, Handler h, Runnable r) { 5918 return new MultinetworkPolicyTracker(c, h, r); 5919 } 5920 5921 @VisibleForTesting 5922 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5923 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5924 } 5925 5926 @VisibleForTesting 5927 public boolean hasService(String name) { 5928 return ServiceManager.checkService(name) != null; 5929 } 5930 5931 @VisibleForTesting 5932 protected IpConnectivityMetrics.Logger metricsLogger() { 5933 return checkNotNull(LocalServices.getService(IpConnectivityMetrics.Logger.class), 5934 "no IpConnectivityMetrics service"); 5935 } 5936 5937 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5938 int[] transports = nai.networkCapabilities.getTransportTypes(); 5939 mMetricsLog.log(nai.network.netId, transports, new NetworkEvent(evtype)); 5940 } 5941 5942 private static boolean toBool(int encodedBoolean) { 5943 return encodedBoolean != 0; // Only 0 means false. 5944 } 5945 5946 private static int encodeBool(boolean b) { 5947 return b ? 1 : 0; 5948 } 5949 5950 @Override 5951 public void onShellCommand(FileDescriptor in, FileDescriptor out, 5952 FileDescriptor err, String[] args, ShellCallback callback, 5953 ResultReceiver resultReceiver) { 5954 (new ShellCmd()).exec(this, in, out, err, args, callback, resultReceiver); 5955 } 5956 5957 private class ShellCmd extends ShellCommand { 5958 5959 @Override 5960 public int onCommand(String cmd) { 5961 if (cmd == null) { 5962 return handleDefaultCommands(cmd); 5963 } 5964 final PrintWriter pw = getOutPrintWriter(); 5965 try { 5966 switch (cmd) { 5967 case "airplane-mode": 5968 final String action = getNextArg(); 5969 if ("enable".equals(action)) { 5970 setAirplaneMode(true); 5971 return 0; 5972 } else if ("disable".equals(action)) { 5973 setAirplaneMode(false); 5974 return 0; 5975 } else if (action == null) { 5976 final ContentResolver cr = mContext.getContentResolver(); 5977 final int enabled = Settings.Global.getInt(cr, 5978 Settings.Global.AIRPLANE_MODE_ON); 5979 pw.println(enabled == 0 ? "disabled" : "enabled"); 5980 return 0; 5981 } else { 5982 onHelp(); 5983 return -1; 5984 } 5985 default: 5986 return handleDefaultCommands(cmd); 5987 } 5988 } catch (Exception e) { 5989 pw.println(e); 5990 } 5991 return -1; 5992 } 5993 5994 @Override 5995 public void onHelp() { 5996 PrintWriter pw = getOutPrintWriter(); 5997 pw.println("Connectivity service commands:"); 5998 pw.println(" help"); 5999 pw.println(" Print this help text."); 6000 pw.println(" airplane-mode [enable|disable]"); 6001 pw.println(" Turn airplane mode on or off."); 6002 pw.println(" airplane-mode"); 6003 pw.println(" Get airplane mode."); 6004 } 6005 } 6006 } 6007