ConnectivityService.java revision 40b707ed3910b130e499873bc20447c582548ec5
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_FOREGROUND; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 31import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 32import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 33import static android.net.NetworkPolicyManager.RULE_ALLOW_METERED; 34import static android.net.NetworkPolicyManager.RULE_NONE; 35import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 36import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 37import static android.net.NetworkPolicyManager.RULE_TEMPORARY_ALLOW_METERED; 38import static android.net.NetworkPolicyManager.uidRulesToString; 39 40import android.annotation.Nullable; 41import android.app.BroadcastOptions; 42import android.app.NotificationManager; 43import android.app.PendingIntent; 44import android.content.BroadcastReceiver; 45import android.content.ContentResolver; 46import android.content.Context; 47import android.content.Intent; 48import android.content.IntentFilter; 49import android.content.pm.PackageManager; 50import android.content.res.Configuration; 51import android.content.res.Resources; 52import android.database.ContentObserver; 53import android.net.ConnectivityManager; 54import android.net.ConnectivityManager.PacketKeepalive; 55import android.net.IConnectivityManager; 56import android.net.INetworkManagementEventObserver; 57import android.net.INetworkPolicyListener; 58import android.net.INetworkPolicyManager; 59import android.net.INetworkStatsService; 60import android.net.LinkProperties; 61import android.net.LinkProperties.CompareResult; 62import android.net.Network; 63import android.net.NetworkAgent; 64import android.net.NetworkCapabilities; 65import android.net.NetworkConfig; 66import android.net.NetworkInfo; 67import android.net.NetworkInfo.DetailedState; 68import android.net.NetworkMisc; 69import android.net.NetworkQuotaInfo; 70import android.net.NetworkRequest; 71import android.net.NetworkState; 72import android.net.NetworkUtils; 73import android.net.Proxy; 74import android.net.ProxyInfo; 75import android.net.RouteInfo; 76import android.net.UidRange; 77import android.net.Uri; 78import android.net.metrics.DefaultNetworkEvent; 79import android.net.metrics.IpConnectivityLog; 80import android.net.metrics.NetworkEvent; 81import android.os.Binder; 82import android.os.Build; 83import android.os.Bundle; 84import android.os.FileUtils; 85import android.os.Handler; 86import android.os.HandlerThread; 87import android.os.IBinder; 88import android.os.INetworkManagementService; 89import android.os.Looper; 90import android.os.Message; 91import android.os.Messenger; 92import android.os.ParcelFileDescriptor; 93import android.os.PowerManager; 94import android.os.Process; 95import android.os.RemoteException; 96import android.os.ResultReceiver; 97import android.os.SystemClock; 98import android.os.SystemProperties; 99import android.os.UserHandle; 100import android.os.UserManager; 101import android.provider.Settings; 102import android.security.Credentials; 103import android.security.KeyStore; 104import android.telephony.TelephonyManager; 105import android.text.TextUtils; 106import android.util.ArraySet; 107import android.util.LocalLog; 108import android.util.LocalLog.ReadOnlyLocalLog; 109import android.util.Log; 110import android.util.Pair; 111import android.util.Slog; 112import android.util.SparseArray; 113import android.util.SparseBooleanArray; 114import android.util.SparseIntArray; 115import android.util.Xml; 116 117import com.android.internal.R; 118import com.android.internal.annotations.GuardedBy; 119import com.android.internal.annotations.VisibleForTesting; 120import com.android.internal.app.IBatteryStats; 121import com.android.internal.net.LegacyVpnInfo; 122import com.android.internal.net.NetworkStatsFactory; 123import com.android.internal.net.VpnConfig; 124import com.android.internal.net.VpnInfo; 125import com.android.internal.net.VpnProfile; 126import com.android.internal.util.AsyncChannel; 127import com.android.internal.util.IndentingPrintWriter; 128import com.android.internal.util.MessageUtils; 129import com.android.internal.util.WakeupMessage; 130import com.android.internal.util.XmlUtils; 131import com.android.server.am.BatteryStatsService; 132import com.android.server.connectivity.DataConnectionStats; 133import com.android.server.connectivity.KeepaliveTracker; 134import com.android.server.connectivity.Nat464Xlat; 135import com.android.server.connectivity.LingerMonitor; 136import com.android.server.connectivity.NetworkAgentInfo; 137import com.android.server.connectivity.NetworkDiagnostics; 138import com.android.server.connectivity.NetworkMonitor; 139import com.android.server.connectivity.NetworkNotificationManager; 140import com.android.server.connectivity.NetworkNotificationManager.NotificationType; 141import com.android.server.connectivity.PacManager; 142import com.android.server.connectivity.PermissionMonitor; 143import com.android.server.connectivity.Tethering; 144import com.android.server.connectivity.Vpn; 145import com.android.server.net.BaseNetworkObserver; 146import com.android.server.net.LockdownVpnTracker; 147 148import com.google.android.collect.Lists; 149 150import org.xmlpull.v1.XmlPullParser; 151import org.xmlpull.v1.XmlPullParserException; 152 153import java.io.File; 154import java.io.FileDescriptor; 155import java.io.FileNotFoundException; 156import java.io.FileReader; 157import java.io.IOException; 158import java.io.PrintWriter; 159import java.net.Inet4Address; 160import java.net.InetAddress; 161import java.net.UnknownHostException; 162import java.util.ArrayDeque; 163import java.util.ArrayList; 164import java.util.Arrays; 165import java.util.Collection; 166import java.util.HashMap; 167import java.util.HashSet; 168import java.util.List; 169import java.util.Map; 170import java.util.Objects; 171import java.util.SortedSet; 172import java.util.TreeSet; 173 174/** 175 * @hide 176 */ 177public class ConnectivityService extends IConnectivityManager.Stub 178 implements PendingIntent.OnFinished { 179 private static final String TAG = ConnectivityService.class.getSimpleName(); 180 181 private static final boolean DBG = true; 182 private static final boolean VDBG = false; 183 184 private static final boolean LOGD_RULES = false; 185 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 186 187 // TODO: create better separation between radio types and network types 188 189 // how long to wait before switching back to a radio's default network 190 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 191 // system property that can override the above value 192 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 193 "android.telephony.apn-restore"; 194 195 // How long to wait before putting up a "This network doesn't have an Internet connection, 196 // connect anyway?" dialog after the user selects a network that doesn't validate. 197 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 198 199 // Default to 30s linger time-out. Modifiable only for testing. 200 private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; 201 private static final int DEFAULT_LINGER_DELAY_MS = 30_000; 202 @VisibleForTesting 203 protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it. 204 205 // How long to delay to removal of a pending intent based request. 206 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 207 private final int mReleasePendingIntentDelayMs; 208 209 private Tethering mTethering; 210 211 private final PermissionMonitor mPermissionMonitor; 212 213 private KeyStore mKeyStore; 214 215 @GuardedBy("mVpns") 216 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 217 218 private boolean mLockdownEnabled; 219 private LockdownVpnTracker mLockdownTracker; 220 221 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 222 private Object mRulesLock = new Object(); 223 /** Currently active network rules by UID. */ 224 @GuardedBy("mRulesLock") 225 private SparseIntArray mUidRules = new SparseIntArray(); 226 /** Set of ifaces that are costly. */ 227 @GuardedBy("mRulesLock") 228 private ArraySet<String> mMeteredIfaces = new ArraySet<>(); 229 /** Flag indicating if background data is restricted. */ 230 @GuardedBy("mRulesLock") 231 private boolean mRestrictBackground; 232 233 final private Context mContext; 234 private int mNetworkPreference; 235 // 0 is full bad, 100 is full good 236 private int mDefaultInetConditionPublished = 0; 237 238 private int mNumDnsEntries; 239 240 private boolean mTestMode; 241 private static ConnectivityService sServiceInstance; 242 243 private INetworkManagementService mNetd; 244 private INetworkStatsService mStatsService; 245 private INetworkPolicyManager mPolicyManager; 246 247 private String mCurrentTcpBufferSizes; 248 249 private static final int ENABLED = 1; 250 private static final int DISABLED = 0; 251 252 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 253 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class, 254 NetworkAgentInfo.class }); 255 256 private enum ReapUnvalidatedNetworks { 257 // Tear down networks that have no chance (e.g. even if validated) of becoming 258 // the highest scoring network satisfying a NetworkRequest. This should be passed when 259 // all networks have been rematched against all NetworkRequests. 260 REAP, 261 // Don't reap networks. This should be passed when some networks have not yet been 262 // rematched against all NetworkRequests. 263 DONT_REAP 264 }; 265 266 private enum UnneededFor { 267 LINGER, // Determine whether this network is unneeded and should be lingered. 268 TEARDOWN, // Determine whether this network is unneeded and should be torn down. 269 } 270 271 /** 272 * used internally to change our mobile data enabled flag 273 */ 274 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 275 276 /** 277 * used internally to clear a wakelock when transitioning 278 * from one net to another. Clear happens when we get a new 279 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 280 * after a timeout if no network is found (typically 1 min). 281 */ 282 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 283 284 /** 285 * used internally to reload global proxy settings 286 */ 287 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 288 289 /** 290 * PAC manager has received new port. 291 */ 292 private static final int EVENT_PROXY_HAS_CHANGED = 16; 293 294 /** 295 * used internally when registering NetworkFactories 296 * obj = NetworkFactoryInfo 297 */ 298 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 299 300 /** 301 * used internally when registering NetworkAgents 302 * obj = Messenger 303 */ 304 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 305 306 /** 307 * used to add a network request 308 * includes a NetworkRequestInfo 309 */ 310 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 311 312 /** 313 * indicates a timeout period is over - check if we had a network yet or not 314 * and if not, call the timeout callback (but leave the request live until they 315 * cancel it. 316 * includes a NetworkRequestInfo 317 */ 318 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 319 320 /** 321 * used to add a network listener - no request 322 * includes a NetworkRequestInfo 323 */ 324 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 325 326 /** 327 * used to remove a network request, either a listener or a real request 328 * arg1 = UID of caller 329 * obj = NetworkRequest 330 */ 331 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 332 333 /** 334 * used internally when registering NetworkFactories 335 * obj = Messenger 336 */ 337 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 338 339 /** 340 * used internally to expire a wakelock when transitioning 341 * from one net to another. Expire happens when we fail to find 342 * a new network (typically after 1 minute) - 343 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 344 * a replacement network. 345 */ 346 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 347 348 /** 349 * Used internally to indicate the system is ready. 350 */ 351 private static final int EVENT_SYSTEM_READY = 25; 352 353 /** 354 * used to add a network request with a pending intent 355 * obj = NetworkRequestInfo 356 */ 357 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 358 359 /** 360 * used to remove a pending intent and its associated network request. 361 * arg1 = UID of caller 362 * obj = PendingIntent 363 */ 364 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 365 366 /** 367 * used to specify whether a network should be used even if unvalidated. 368 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 369 * arg2 = whether to remember this choice in the future (1 or 0) 370 * obj = network 371 */ 372 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 373 374 /** 375 * used to ask the user to confirm a connection to an unvalidated network. 376 * obj = network 377 */ 378 private static final int EVENT_PROMPT_UNVALIDATED = 29; 379 380 /** 381 * used internally to (re)configure mobile data always-on settings. 382 */ 383 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 384 385 /** 386 * used to add a network listener with a pending intent 387 * obj = NetworkRequestInfo 388 */ 389 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 390 391 /** 392 * Indicates a caller has requested to have its callback invoked with 393 * the latest LinkProperties or NetworkCapabilities. 394 * 395 * arg1 = UID of caller 396 * obj = NetworkRequest 397 */ 398 private static final int EVENT_REQUEST_LINKPROPERTIES = 32; 399 private static final int EVENT_REQUEST_NETCAPABILITIES = 33; 400 401 /** 402 * Used internally to (re)configure avoid bad wifi setting. 403 */ 404 private static final int EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI = 34; 405 406 /** Handler thread used for both of the handlers below. */ 407 @VisibleForTesting 408 protected final HandlerThread mHandlerThread; 409 /** Handler used for internal events. */ 410 final private InternalHandler mHandler; 411 /** Handler used for incoming {@link NetworkStateTracker} events. */ 412 final private NetworkStateTrackerHandler mTrackerHandler; 413 414 private boolean mSystemReady; 415 private Intent mInitialBroadcast; 416 417 private PowerManager.WakeLock mNetTransitionWakeLock; 418 private String mNetTransitionWakeLockCausedBy = ""; 419 private int mNetTransitionWakeLockSerialNumber; 420 private int mNetTransitionWakeLockTimeout; 421 private final PowerManager.WakeLock mPendingIntentWakeLock; 422 423 // used in DBG mode to track inet condition reports 424 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 425 private ArrayList mInetLog; 426 427 // track the current default http proxy - tell the world if we get a new one (real change) 428 private volatile ProxyInfo mDefaultProxy = null; 429 private Object mProxyLock = new Object(); 430 private boolean mDefaultProxyDisabled = false; 431 432 // track the global proxy. 433 private ProxyInfo mGlobalProxy = null; 434 435 private PacManager mPacManager = null; 436 437 final private SettingsObserver mSettingsObserver; 438 439 private UserManager mUserManager; 440 441 NetworkConfig[] mNetConfigs; 442 int mNetworksDefined; 443 444 // the set of network types that can only be enabled by system/sig apps 445 List mProtectedNetworks; 446 447 private DataConnectionStats mDataConnectionStats; 448 449 TelephonyManager mTelephonyManager; 450 451 private KeepaliveTracker mKeepaliveTracker; 452 private NetworkNotificationManager mNotifier; 453 private LingerMonitor mLingerMonitor; 454 455 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 456 private final static int MIN_NET_ID = 100; // some reserved marks 457 private final static int MAX_NET_ID = 65535; 458 private int mNextNetId = MIN_NET_ID; 459 460 // sequence number of NetworkRequests 461 private int mNextNetworkRequestId = 1; 462 463 // NetworkRequest activity String log entries. 464 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 465 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 466 467 // NetworkInfo blocked and unblocked String log entries 468 // TODO: consider reducing memory usage. Each log line is ~40 2B chars, for a total of ~8kB. 469 private static final int MAX_NETWORK_INFO_LOGS = 100; 470 private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); 471 472 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 473 private static final int MAX_VALIDATION_LOGS = 10; 474 private static class ValidationLog { 475 final Network mNetwork; 476 final String mNetworkExtraInfo; 477 final ReadOnlyLocalLog mLog; 478 479 ValidationLog(Network network, String networkExtraInfo, ReadOnlyLocalLog log) { 480 mNetwork = network; 481 mNetworkExtraInfo = networkExtraInfo; 482 mLog = log; 483 } 484 } 485 private final ArrayDeque<ValidationLog> mValidationLogs = 486 new ArrayDeque<ValidationLog>(MAX_VALIDATION_LOGS); 487 488 private void addValidationLogs(ReadOnlyLocalLog log, Network network, String networkExtraInfo) { 489 synchronized(mValidationLogs) { 490 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 491 mValidationLogs.removeLast(); 492 } 493 mValidationLogs.addFirst(new ValidationLog(network, networkExtraInfo, log)); 494 } 495 } 496 497 private final IpConnectivityLog mMetricsLog; 498 499 /** 500 * Implements support for the legacy "one network per network type" model. 501 * 502 * We used to have a static array of NetworkStateTrackers, one for each 503 * network type, but that doesn't work any more now that we can have, 504 * for example, more that one wifi network. This class stores all the 505 * NetworkAgentInfo objects that support a given type, but the legacy 506 * API will only see the first one. 507 * 508 * It serves two main purposes: 509 * 510 * 1. Provide information about "the network for a given type" (since this 511 * API only supports one). 512 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 513 * the first network for a given type changes, or if the default network 514 * changes. 515 */ 516 private class LegacyTypeTracker { 517 518 private static final boolean DBG = true; 519 private static final boolean VDBG = false; 520 521 /** 522 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 523 * Each list holds references to all NetworkAgentInfos that are used to 524 * satisfy requests for that network type. 525 * 526 * This array is built out at startup such that an unsupported network 527 * doesn't get an ArrayList instance, making this a tristate: 528 * unsupported, supported but not active and active. 529 * 530 * The actual lists are populated when we scan the network types that 531 * are supported on this device. 532 * 533 * Threading model: 534 * - addSupportedType() is only called in the constructor 535 * - add(), update(), remove() are only called from the ConnectivityService handler thread. 536 * They are therefore not thread-safe with respect to each other. 537 * - getNetworkForType() can be called at any time on binder threads. It is synchronized 538 * on mTypeLists to be thread-safe with respect to a concurrent remove call. 539 * - dump is thread-safe with respect to concurrent add and remove calls. 540 */ 541 private final ArrayList<NetworkAgentInfo> mTypeLists[]; 542 543 public LegacyTypeTracker() { 544 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 545 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 546 } 547 548 public void addSupportedType(int type) { 549 if (mTypeLists[type] != null) { 550 throw new IllegalStateException( 551 "legacy list for type " + type + "already initialized"); 552 } 553 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 554 } 555 556 public boolean isTypeSupported(int type) { 557 return isNetworkTypeValid(type) && mTypeLists[type] != null; 558 } 559 560 public NetworkAgentInfo getNetworkForType(int type) { 561 synchronized (mTypeLists) { 562 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 563 return mTypeLists[type].get(0); 564 } 565 } 566 return null; 567 } 568 569 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 570 boolean isDefaultNetwork) { 571 if (DBG) { 572 log("Sending " + state + 573 " broadcast for type " + type + " " + nai.name() + 574 " isDefaultNetwork=" + isDefaultNetwork); 575 } 576 } 577 578 /** Adds the given network to the specified legacy type list. */ 579 public void add(int type, NetworkAgentInfo nai) { 580 if (!isTypeSupported(type)) { 581 return; // Invalid network type. 582 } 583 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 584 585 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 586 if (list.contains(nai)) { 587 return; 588 } 589 synchronized (mTypeLists) { 590 list.add(nai); 591 } 592 593 // Send a broadcast if this is the first network of its type or if it's the default. 594 final boolean isDefaultNetwork = isDefaultNetwork(nai); 595 if ((list.size() == 1) || isDefaultNetwork) { 596 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 597 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 598 } 599 } 600 601 /** Removes the given network from the specified legacy type list. */ 602 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 603 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 604 if (list == null || list.isEmpty()) { 605 return; 606 } 607 final boolean wasFirstNetwork = list.get(0).equals(nai); 608 609 synchronized (mTypeLists) { 610 if (!list.remove(nai)) { 611 return; 612 } 613 } 614 615 final DetailedState state = DetailedState.DISCONNECTED; 616 617 if (wasFirstNetwork || wasDefault) { 618 maybeLogBroadcast(nai, state, type, wasDefault); 619 sendLegacyNetworkBroadcast(nai, state, type); 620 } 621 622 if (!list.isEmpty() && wasFirstNetwork) { 623 if (DBG) log("Other network available for type " + type + 624 ", sending connected broadcast"); 625 final NetworkAgentInfo replacement = list.get(0); 626 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 627 sendLegacyNetworkBroadcast(replacement, state, type); 628 } 629 } 630 631 /** Removes the given network from all legacy type lists. */ 632 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 633 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 634 for (int type = 0; type < mTypeLists.length; type++) { 635 remove(type, nai, wasDefault); 636 } 637 } 638 639 // send out another legacy broadcast - currently only used for suspend/unsuspend 640 // toggle 641 public void update(NetworkAgentInfo nai) { 642 final boolean isDefault = isDefaultNetwork(nai); 643 final DetailedState state = nai.networkInfo.getDetailedState(); 644 for (int type = 0; type < mTypeLists.length; type++) { 645 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 646 final boolean contains = (list != null && list.contains(nai)); 647 final boolean isFirst = contains && (nai == list.get(0)); 648 if (isFirst || contains && isDefault) { 649 maybeLogBroadcast(nai, state, type, isDefault); 650 sendLegacyNetworkBroadcast(nai, state, type); 651 } 652 } 653 } 654 655 private String naiToString(NetworkAgentInfo nai) { 656 String name = (nai != null) ? nai.name() : "null"; 657 String state = (nai.networkInfo != null) ? 658 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 659 "???/???"; 660 return name + " " + state; 661 } 662 663 public void dump(IndentingPrintWriter pw) { 664 pw.println("mLegacyTypeTracker:"); 665 pw.increaseIndent(); 666 pw.print("Supported types:"); 667 for (int type = 0; type < mTypeLists.length; type++) { 668 if (mTypeLists[type] != null) pw.print(" " + type); 669 } 670 pw.println(); 671 pw.println("Current state:"); 672 pw.increaseIndent(); 673 synchronized (mTypeLists) { 674 for (int type = 0; type < mTypeLists.length; type++) { 675 if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; 676 for (NetworkAgentInfo nai : mTypeLists[type]) { 677 pw.println(type + " " + naiToString(nai)); 678 } 679 } 680 } 681 pw.decreaseIndent(); 682 pw.decreaseIndent(); 683 pw.println(); 684 } 685 } 686 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 687 688 @VisibleForTesting 689 protected HandlerThread createHandlerThread() { 690 return new HandlerThread("ConnectivityServiceThread"); 691 } 692 693 public ConnectivityService(Context context, INetworkManagementService netManager, 694 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 695 this(context, netManager, statsService, policyManager, new IpConnectivityLog()); 696 } 697 698 @VisibleForTesting 699 protected ConnectivityService(Context context, INetworkManagementService netManager, 700 INetworkStatsService statsService, INetworkPolicyManager policyManager, 701 IpConnectivityLog logger) { 702 if (DBG) log("ConnectivityService starting up"); 703 704 mMetricsLog = logger; 705 mDefaultRequest = createInternetRequestForTransport(-1, NetworkRequest.Type.REQUEST); 706 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); 707 mNetworkRequests.put(mDefaultRequest, defaultNRI); 708 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 709 710 mDefaultMobileDataRequest = createInternetRequestForTransport( 711 NetworkCapabilities.TRANSPORT_CELLULAR, NetworkRequest.Type.BACKGROUND_REQUEST); 712 713 mHandlerThread = createHandlerThread(); 714 mHandlerThread.start(); 715 mHandler = new InternalHandler(mHandlerThread.getLooper()); 716 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 717 718 // setup our unique device name 719 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 720 String id = Settings.Secure.getString(context.getContentResolver(), 721 Settings.Secure.ANDROID_ID); 722 if (id != null && id.length() > 0) { 723 String name = new String("android-").concat(id); 724 SystemProperties.set("net.hostname", name); 725 } 726 } 727 728 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 729 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 730 731 mLingerDelayMs = SystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); 732 733 mContext = checkNotNull(context, "missing Context"); 734 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 735 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 736 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 737 mKeyStore = KeyStore.getInstance(); 738 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 739 740 try { 741 mPolicyManager.setConnectivityListener(mPolicyListener); 742 mRestrictBackground = mPolicyManager.getRestrictBackground(); 743 } catch (RemoteException e) { 744 // ouch, no rules updates means some processes may never get network 745 loge("unable to register INetworkPolicyListener" + e); 746 } 747 748 final PowerManager powerManager = (PowerManager) context.getSystemService( 749 Context.POWER_SERVICE); 750 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 751 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 752 com.android.internal.R.integer.config_networkTransitionTimeout); 753 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 754 755 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 756 757 // TODO: What is the "correct" way to do determine if this is a wifi only device? 758 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 759 log("wifiOnly=" + wifiOnly); 760 String[] naStrings = context.getResources().getStringArray( 761 com.android.internal.R.array.networkAttributes); 762 for (String naString : naStrings) { 763 try { 764 NetworkConfig n = new NetworkConfig(naString); 765 if (VDBG) log("naString=" + naString + " config=" + n); 766 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 767 loge("Error in networkAttributes - ignoring attempt to define type " + 768 n.type); 769 continue; 770 } 771 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 772 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 773 n.type); 774 continue; 775 } 776 if (mNetConfigs[n.type] != null) { 777 loge("Error in networkAttributes - ignoring attempt to redefine type " + 778 n.type); 779 continue; 780 } 781 mLegacyTypeTracker.addSupportedType(n.type); 782 783 mNetConfigs[n.type] = n; 784 mNetworksDefined++; 785 } catch(Exception e) { 786 // ignore it - leave the entry null 787 } 788 } 789 790 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 791 if (mNetConfigs[TYPE_VPN] == null) { 792 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 793 // don't need to add TYPE_VPN to mNetConfigs. 794 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 795 mNetworksDefined++; // used only in the log() statement below. 796 } 797 798 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 799 800 mProtectedNetworks = new ArrayList<Integer>(); 801 int[] protectedNetworks = context.getResources().getIntArray( 802 com.android.internal.R.array.config_protectedNetworks); 803 for (int p : protectedNetworks) { 804 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 805 mProtectedNetworks.add(p); 806 } else { 807 if (DBG) loge("Ignoring protectedNetwork " + p); 808 } 809 } 810 811 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 812 && SystemProperties.get("ro.build.type").equals("eng"); 813 814 mTethering = new Tethering(mContext, mNetd, statsService); 815 816 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 817 818 //set up the listener for user state for creating user VPNs 819 IntentFilter intentFilter = new IntentFilter(); 820 intentFilter.addAction(Intent.ACTION_USER_STARTED); 821 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 822 intentFilter.addAction(Intent.ACTION_USER_ADDED); 823 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 824 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 825 mContext.registerReceiverAsUser( 826 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 827 828 try { 829 mNetd.registerObserver(mTethering); 830 mNetd.registerObserver(mDataActivityObserver); 831 } catch (RemoteException e) { 832 loge("Error registering observer :" + e); 833 } 834 835 if (DBG) { 836 mInetLog = new ArrayList(); 837 } 838 839 mSettingsObserver = new SettingsObserver(mContext, mHandler); 840 registerSettingsCallbacks(); 841 842 mDataConnectionStats = new DataConnectionStats(mContext); 843 mDataConnectionStats.startMonitoring(); 844 845 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 846 847 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 848 849 mKeepaliveTracker = new KeepaliveTracker(mHandler); 850 mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager, 851 mContext.getSystemService(NotificationManager.class)); 852 853 final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(), 854 Settings.Global.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT, 855 LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT); 856 final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(), 857 Settings.Global.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS, 858 LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS); 859 mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit); 860 } 861 862 private NetworkRequest createInternetRequestForTransport( 863 int transportType, NetworkRequest.Type type) { 864 NetworkCapabilities netCap = new NetworkCapabilities(); 865 netCap.addCapability(NET_CAPABILITY_INTERNET); 866 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 867 if (transportType > -1) { 868 netCap.addTransportType(transportType); 869 } 870 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type); 871 } 872 873 // Used only for testing. 874 // TODO: Delete this and either: 875 // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires 876 // changing ContentResolver to make registerContentObserver non-final). 877 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 878 // by subclassing SettingsObserver. 879 @VisibleForTesting 880 void updateMobileDataAlwaysOn() { 881 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 882 } 883 884 private void handleMobileDataAlwaysOn() { 885 final boolean enable = (Settings.Global.getInt( 886 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 887 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 888 if (enable == isEnabled) { 889 return; // Nothing to do. 890 } 891 892 if (enable) { 893 handleRegisterNetworkRequest(new NetworkRequestInfo( 894 null, mDefaultMobileDataRequest, new Binder())); 895 } else { 896 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 897 } 898 } 899 900 private void registerSettingsCallbacks() { 901 // Watch for global HTTP proxy changes. 902 mSettingsObserver.observe( 903 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 904 EVENT_APPLY_GLOBAL_HTTP_PROXY); 905 906 // Watch for whether or not to keep mobile data always on. 907 mSettingsObserver.observe( 908 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 909 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 910 911 // Watch for whether to automatically switch away from wifi networks that lose Internet 912 // access. 913 mSettingsObserver.observe( 914 Settings.Global.getUriFor(Settings.Global.NETWORK_AVOID_BAD_WIFI), 915 EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI); 916 } 917 918 private synchronized int nextNetworkRequestId() { 919 return mNextNetworkRequestId++; 920 } 921 922 @VisibleForTesting 923 protected int reserveNetId() { 924 synchronized (mNetworkForNetId) { 925 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 926 int netId = mNextNetId; 927 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 928 // Make sure NetID unused. http://b/16815182 929 if (!mNetIdInUse.get(netId)) { 930 mNetIdInUse.put(netId, true); 931 return netId; 932 } 933 } 934 } 935 throw new IllegalStateException("No free netIds"); 936 } 937 938 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 939 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 940 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 941 final NetworkState state; 942 if (nai != null) { 943 state = nai.getNetworkState(); 944 state.networkInfo.setType(networkType); 945 } else { 946 final NetworkInfo info = new NetworkInfo(networkType, 0, 947 getNetworkTypeName(networkType), ""); 948 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 949 info.setIsAvailable(true); 950 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 951 null, null, null); 952 } 953 filterNetworkStateForUid(state, uid, ignoreBlocked); 954 return state; 955 } else { 956 return NetworkState.EMPTY; 957 } 958 } 959 960 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 961 if (network == null) { 962 return null; 963 } 964 synchronized (mNetworkForNetId) { 965 return mNetworkForNetId.get(network.netId); 966 } 967 } 968 969 private Network[] getVpnUnderlyingNetworks(int uid) { 970 if (!mLockdownEnabled) { 971 int user = UserHandle.getUserId(uid); 972 synchronized (mVpns) { 973 Vpn vpn = mVpns.get(user); 974 if (vpn != null && vpn.appliesToUid(uid)) { 975 return vpn.getUnderlyingNetworks(); 976 } 977 } 978 } 979 return null; 980 } 981 982 private NetworkState getUnfilteredActiveNetworkState(int uid) { 983 NetworkAgentInfo nai = getDefaultNetwork(); 984 985 final Network[] networks = getVpnUnderlyingNetworks(uid); 986 if (networks != null) { 987 // getUnderlyingNetworks() returns: 988 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 989 // empty array => the VPN explicitly said "no default network". 990 // non-empty array => the VPN specified one or more default networks; we use the 991 // first one. 992 if (networks.length > 0) { 993 nai = getNetworkAgentInfoForNetwork(networks[0]); 994 } else { 995 nai = null; 996 } 997 } 998 999 if (nai != null) { 1000 return nai.getNetworkState(); 1001 } else { 1002 return NetworkState.EMPTY; 1003 } 1004 } 1005 1006 /** 1007 * Check if UID should be blocked from using the network with the given LinkProperties. 1008 */ 1009 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 1010 boolean ignoreBlocked) { 1011 // Networks aren't blocked when ignoring blocked status 1012 if (ignoreBlocked) return false; 1013 // Networks are never blocked for system services 1014 if (isSystem(uid)) return false; 1015 1016 final boolean networkMetered; 1017 final int uidRules; 1018 1019 synchronized (mVpns) { 1020 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 1021 if (vpn != null && vpn.isBlockingUid(uid)) { 1022 return true; 1023 } 1024 } 1025 1026 final String iface = (lp == null ? "" : lp.getInterfaceName()); 1027 synchronized (mRulesLock) { 1028 networkMetered = mMeteredIfaces.contains(iface); 1029 uidRules = mUidRules.get(uid, RULE_NONE); 1030 } 1031 1032 boolean allowed = true; 1033 // Check Data Saver Mode first... 1034 if (networkMetered) { 1035 if ((uidRules & RULE_REJECT_METERED) != 0) { 1036 if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); 1037 // Explicitly blacklisted. 1038 allowed = false; 1039 } else { 1040 allowed = !mRestrictBackground 1041 || (uidRules & RULE_ALLOW_METERED) != 0 1042 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; 1043 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1044 + " mRestrictBackground=" + mRestrictBackground 1045 + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) 1046 + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" 1047 + ": " + allowed); 1048 } 1049 } 1050 // ...then power restrictions. 1051 if (allowed) { 1052 allowed = (uidRules & RULE_REJECT_ALL) == 0; 1053 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1054 + " rule is " + uidRulesToString(uidRules) + ": " + allowed); 1055 } 1056 return !allowed; 1057 } 1058 1059 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1060 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1061 return; 1062 } 1063 boolean removed = false; 1064 boolean added = false; 1065 synchronized (mBlockedAppUids) { 1066 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1067 added = true; 1068 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1069 removed = true; 1070 } 1071 } 1072 if (added) { 1073 log("Returning blocked NetworkInfo to uid=" + uid); 1074 mNetworkInfoBlockingLogs.log("BLOCKED " + uid); 1075 } else if (removed) { 1076 log("Returning unblocked NetworkInfo to uid=" + uid); 1077 mNetworkInfoBlockingLogs.log("UNBLOCKED " + uid); 1078 } 1079 } 1080 1081 /** 1082 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1083 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1084 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 1085 * {@link NetworkInfo#isMetered()} based on network policies. 1086 */ 1087 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1088 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1089 1090 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1091 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1092 } 1093 if (mLockdownTracker != null) { 1094 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1095 } 1096 1097 // TODO: apply metered state closer to NetworkAgentInfo 1098 final long token = Binder.clearCallingIdentity(); 1099 try { 1100 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 1101 } catch (RemoteException e) { 1102 } finally { 1103 Binder.restoreCallingIdentity(token); 1104 } 1105 } 1106 1107 /** 1108 * Return NetworkInfo for the active (i.e., connected) network interface. 1109 * It is assumed that at most one network is active at a time. If more 1110 * than one is active, it is indeterminate which will be returned. 1111 * @return the info for the active network, or {@code null} if none is 1112 * active 1113 */ 1114 @Override 1115 public NetworkInfo getActiveNetworkInfo() { 1116 enforceAccessPermission(); 1117 final int uid = Binder.getCallingUid(); 1118 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1119 filterNetworkStateForUid(state, uid, false); 1120 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1121 return state.networkInfo; 1122 } 1123 1124 @Override 1125 public Network getActiveNetwork() { 1126 enforceAccessPermission(); 1127 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1128 } 1129 1130 @Override 1131 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1132 enforceConnectivityInternalPermission(); 1133 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1134 } 1135 1136 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1137 final int user = UserHandle.getUserId(uid); 1138 int vpnNetId = NETID_UNSET; 1139 synchronized (mVpns) { 1140 final Vpn vpn = mVpns.get(user); 1141 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1142 } 1143 NetworkAgentInfo nai; 1144 if (vpnNetId != NETID_UNSET) { 1145 synchronized (mNetworkForNetId) { 1146 nai = mNetworkForNetId.get(vpnNetId); 1147 } 1148 if (nai != null) return nai.network; 1149 } 1150 nai = getDefaultNetwork(); 1151 if (nai != null 1152 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1153 nai = null; 1154 } 1155 return nai != null ? nai.network : null; 1156 } 1157 1158 // Public because it's used by mLockdownTracker. 1159 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1160 enforceAccessPermission(); 1161 final int uid = Binder.getCallingUid(); 1162 NetworkState state = getUnfilteredActiveNetworkState(uid); 1163 return state.networkInfo; 1164 } 1165 1166 @Override 1167 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1168 enforceConnectivityInternalPermission(); 1169 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1170 filterNetworkStateForUid(state, uid, ignoreBlocked); 1171 return state.networkInfo; 1172 } 1173 1174 @Override 1175 public NetworkInfo getNetworkInfo(int networkType) { 1176 enforceAccessPermission(); 1177 final int uid = Binder.getCallingUid(); 1178 if (getVpnUnderlyingNetworks(uid) != null) { 1179 // A VPN is active, so we may need to return one of its underlying networks. This 1180 // information is not available in LegacyTypeTracker, so we have to get it from 1181 // getUnfilteredActiveNetworkState. 1182 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1183 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1184 filterNetworkStateForUid(state, uid, false); 1185 return state.networkInfo; 1186 } 1187 } 1188 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1189 return state.networkInfo; 1190 } 1191 1192 @Override 1193 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1194 enforceAccessPermission(); 1195 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1196 if (nai != null) { 1197 final NetworkState state = nai.getNetworkState(); 1198 filterNetworkStateForUid(state, uid, ignoreBlocked); 1199 return state.networkInfo; 1200 } else { 1201 return null; 1202 } 1203 } 1204 1205 @Override 1206 public NetworkInfo[] getAllNetworkInfo() { 1207 enforceAccessPermission(); 1208 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1209 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1210 networkType++) { 1211 NetworkInfo info = getNetworkInfo(networkType); 1212 if (info != null) { 1213 result.add(info); 1214 } 1215 } 1216 return result.toArray(new NetworkInfo[result.size()]); 1217 } 1218 1219 @Override 1220 public Network getNetworkForType(int networkType) { 1221 enforceAccessPermission(); 1222 final int uid = Binder.getCallingUid(); 1223 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1224 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1225 return state.network; 1226 } 1227 return null; 1228 } 1229 1230 @Override 1231 public Network[] getAllNetworks() { 1232 enforceAccessPermission(); 1233 synchronized (mNetworkForNetId) { 1234 final Network[] result = new Network[mNetworkForNetId.size()]; 1235 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1236 result[i] = mNetworkForNetId.valueAt(i).network; 1237 } 1238 return result; 1239 } 1240 } 1241 1242 @Override 1243 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1244 // The basic principle is: if an app's traffic could possibly go over a 1245 // network, without the app doing anything multinetwork-specific, 1246 // (hence, by "default"), then include that network's capabilities in 1247 // the array. 1248 // 1249 // In the normal case, app traffic only goes over the system's default 1250 // network connection, so that's the only network returned. 1251 // 1252 // With a VPN in force, some app traffic may go into the VPN, and thus 1253 // over whatever underlying networks the VPN specifies, while other app 1254 // traffic may go over the system default network (e.g.: a split-tunnel 1255 // VPN, or an app disallowed by the VPN), so the set of networks 1256 // returned includes the VPN's underlying networks and the system 1257 // default. 1258 enforceAccessPermission(); 1259 1260 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1261 1262 NetworkAgentInfo nai = getDefaultNetwork(); 1263 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1264 if (nc != null) { 1265 result.put(nai.network, nc); 1266 } 1267 1268 if (!mLockdownEnabled) { 1269 synchronized (mVpns) { 1270 Vpn vpn = mVpns.get(userId); 1271 if (vpn != null) { 1272 Network[] networks = vpn.getUnderlyingNetworks(); 1273 if (networks != null) { 1274 for (Network network : networks) { 1275 nai = getNetworkAgentInfoForNetwork(network); 1276 nc = getNetworkCapabilitiesInternal(nai); 1277 if (nc != null) { 1278 result.put(network, nc); 1279 } 1280 } 1281 } 1282 } 1283 } 1284 } 1285 1286 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1287 out = result.values().toArray(out); 1288 return out; 1289 } 1290 1291 @Override 1292 public boolean isNetworkSupported(int networkType) { 1293 enforceAccessPermission(); 1294 return mLegacyTypeTracker.isTypeSupported(networkType); 1295 } 1296 1297 /** 1298 * Return LinkProperties for the active (i.e., connected) default 1299 * network interface. It is assumed that at most one default network 1300 * is active at a time. If more than one is active, it is indeterminate 1301 * which will be returned. 1302 * @return the ip properties for the active network, or {@code null} if 1303 * none is active 1304 */ 1305 @Override 1306 public LinkProperties getActiveLinkProperties() { 1307 enforceAccessPermission(); 1308 final int uid = Binder.getCallingUid(); 1309 NetworkState state = getUnfilteredActiveNetworkState(uid); 1310 return state.linkProperties; 1311 } 1312 1313 @Override 1314 public LinkProperties getLinkPropertiesForType(int networkType) { 1315 enforceAccessPermission(); 1316 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1317 if (nai != null) { 1318 synchronized (nai) { 1319 return new LinkProperties(nai.linkProperties); 1320 } 1321 } 1322 return null; 1323 } 1324 1325 // TODO - this should be ALL networks 1326 @Override 1327 public LinkProperties getLinkProperties(Network network) { 1328 enforceAccessPermission(); 1329 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1330 if (nai != null) { 1331 synchronized (nai) { 1332 return new LinkProperties(nai.linkProperties); 1333 } 1334 } 1335 return null; 1336 } 1337 1338 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1339 if (nai != null) { 1340 synchronized (nai) { 1341 if (nai.networkCapabilities != null) { 1342 return new NetworkCapabilities(nai.networkCapabilities); 1343 } 1344 } 1345 } 1346 return null; 1347 } 1348 1349 @Override 1350 public NetworkCapabilities getNetworkCapabilities(Network network) { 1351 enforceAccessPermission(); 1352 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1353 } 1354 1355 @Override 1356 public NetworkState[] getAllNetworkState() { 1357 // Require internal since we're handing out IMSI details 1358 enforceConnectivityInternalPermission(); 1359 1360 final ArrayList<NetworkState> result = Lists.newArrayList(); 1361 for (Network network : getAllNetworks()) { 1362 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1363 if (nai != null) { 1364 result.add(nai.getNetworkState()); 1365 } 1366 } 1367 return result.toArray(new NetworkState[result.size()]); 1368 } 1369 1370 @Override 1371 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1372 enforceAccessPermission(); 1373 final int uid = Binder.getCallingUid(); 1374 final long token = Binder.clearCallingIdentity(); 1375 try { 1376 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1377 if (state.networkInfo != null) { 1378 try { 1379 return mPolicyManager.getNetworkQuotaInfo(state); 1380 } catch (RemoteException e) { 1381 } 1382 } 1383 return null; 1384 } finally { 1385 Binder.restoreCallingIdentity(token); 1386 } 1387 } 1388 1389 @Override 1390 public boolean isActiveNetworkMetered() { 1391 enforceAccessPermission(); 1392 1393 final NetworkInfo info = getActiveNetworkInfo(); 1394 return (info != null) ? info.isMetered() : false; 1395 } 1396 1397 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1398 @Override 1399 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1400 int deviceType = Integer.parseInt(label); 1401 sendDataActivityBroadcast(deviceType, active, tsNanos); 1402 } 1403 }; 1404 1405 /** 1406 * Ensure that a network route exists to deliver traffic to the specified 1407 * host via the specified network interface. 1408 * @param networkType the type of the network over which traffic to the 1409 * specified host is to be routed 1410 * @param hostAddress the IP address of the host to which the route is 1411 * desired 1412 * @return {@code true} on success, {@code false} on failure 1413 */ 1414 @Override 1415 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1416 enforceChangePermission(); 1417 if (mProtectedNetworks.contains(networkType)) { 1418 enforceConnectivityInternalPermission(); 1419 } 1420 1421 InetAddress addr; 1422 try { 1423 addr = InetAddress.getByAddress(hostAddress); 1424 } catch (UnknownHostException e) { 1425 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1426 return false; 1427 } 1428 1429 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1430 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1431 return false; 1432 } 1433 1434 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1435 if (nai == null) { 1436 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1437 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1438 } else { 1439 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1440 } 1441 return false; 1442 } 1443 1444 DetailedState netState; 1445 synchronized (nai) { 1446 netState = nai.networkInfo.getDetailedState(); 1447 } 1448 1449 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1450 if (VDBG) { 1451 log("requestRouteToHostAddress on down network " 1452 + "(" + networkType + ") - dropped" 1453 + " netState=" + netState); 1454 } 1455 return false; 1456 } 1457 1458 final int uid = Binder.getCallingUid(); 1459 final long token = Binder.clearCallingIdentity(); 1460 try { 1461 LinkProperties lp; 1462 int netId; 1463 synchronized (nai) { 1464 lp = nai.linkProperties; 1465 netId = nai.network.netId; 1466 } 1467 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1468 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1469 return ok; 1470 } finally { 1471 Binder.restoreCallingIdentity(token); 1472 } 1473 } 1474 1475 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1476 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1477 if (bestRoute == null) { 1478 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1479 } else { 1480 String iface = bestRoute.getInterface(); 1481 if (bestRoute.getGateway().equals(addr)) { 1482 // if there is no better route, add the implied hostroute for our gateway 1483 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1484 } else { 1485 // if we will connect to this through another route, add a direct route 1486 // to it's gateway 1487 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1488 } 1489 } 1490 if (DBG) log("Adding legacy route " + bestRoute + 1491 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1492 try { 1493 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1494 } catch (Exception e) { 1495 // never crash - catch them all 1496 if (DBG) loge("Exception trying to add a route: " + e); 1497 return false; 1498 } 1499 return true; 1500 } 1501 1502 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1503 @Override 1504 public void onUidRulesChanged(int uid, int uidRules) { 1505 // caller is NPMS, since we only register with them 1506 if (LOGD_RULES) { 1507 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1508 } 1509 1510 synchronized (mRulesLock) { 1511 // skip update when we've already applied rules 1512 final int oldRules = mUidRules.get(uid, RULE_NONE); 1513 if (oldRules == uidRules) return; 1514 1515 if (uidRules == RULE_NONE) { 1516 mUidRules.delete(uid); 1517 } else { 1518 mUidRules.put(uid, uidRules); 1519 } 1520 } 1521 1522 // TODO: notify UID when it has requested targeted updates 1523 } 1524 1525 @Override 1526 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1527 // caller is NPMS, since we only register with them 1528 if (LOGD_RULES) { 1529 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1530 } 1531 1532 synchronized (mRulesLock) { 1533 mMeteredIfaces.clear(); 1534 for (String iface : meteredIfaces) { 1535 mMeteredIfaces.add(iface); 1536 } 1537 } 1538 } 1539 1540 @Override 1541 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1542 // caller is NPMS, since we only register with them 1543 if (LOGD_RULES) { 1544 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1545 } 1546 1547 synchronized (mRulesLock) { 1548 mRestrictBackground = restrictBackground; 1549 } 1550 1551 if (restrictBackground) { 1552 log("onRestrictBackgroundChanged(true): disabling tethering"); 1553 mTethering.untetherAll(); 1554 } 1555 } 1556 1557 @Override 1558 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1559 if (LOGD_RULES) { 1560 // caller is NPMS, since we only register with them 1561 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1562 + whitelisted + ")"); 1563 } 1564 } 1565 @Override 1566 public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { 1567 if (LOGD_RULES) { 1568 // caller is NPMS, since we only register with them 1569 log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" 1570 + blacklisted + ")"); 1571 } 1572 } 1573 }; 1574 1575 /** 1576 * Require that the caller is either in the same user or has appropriate permission to interact 1577 * across users. 1578 * 1579 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1580 */ 1581 private void enforceCrossUserPermission(int userId) { 1582 if (userId == UserHandle.getCallingUserId()) { 1583 // Not a cross-user call. 1584 return; 1585 } 1586 mContext.enforceCallingOrSelfPermission( 1587 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1588 "ConnectivityService"); 1589 } 1590 1591 private void enforceInternetPermission() { 1592 mContext.enforceCallingOrSelfPermission( 1593 android.Manifest.permission.INTERNET, 1594 "ConnectivityService"); 1595 } 1596 1597 private void enforceAccessPermission() { 1598 mContext.enforceCallingOrSelfPermission( 1599 android.Manifest.permission.ACCESS_NETWORK_STATE, 1600 "ConnectivityService"); 1601 } 1602 1603 private void enforceChangePermission() { 1604 ConnectivityManager.enforceChangePermission(mContext); 1605 } 1606 1607 private void enforceTetherAccessPermission() { 1608 mContext.enforceCallingOrSelfPermission( 1609 android.Manifest.permission.ACCESS_NETWORK_STATE, 1610 "ConnectivityService"); 1611 } 1612 1613 private void enforceConnectivityInternalPermission() { 1614 mContext.enforceCallingOrSelfPermission( 1615 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1616 "ConnectivityService"); 1617 } 1618 1619 private void enforceConnectivityRestrictedNetworksPermission() { 1620 try { 1621 mContext.enforceCallingOrSelfPermission( 1622 android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, 1623 "ConnectivityService"); 1624 return; 1625 } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } 1626 enforceConnectivityInternalPermission(); 1627 } 1628 1629 private void enforceKeepalivePermission() { 1630 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1631 } 1632 1633 // Public because it's used by mLockdownTracker. 1634 public void sendConnectedBroadcast(NetworkInfo info) { 1635 enforceConnectivityInternalPermission(); 1636 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1637 } 1638 1639 private void sendInetConditionBroadcast(NetworkInfo info) { 1640 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1641 } 1642 1643 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1644 if (mLockdownTracker != null) { 1645 info = new NetworkInfo(info); 1646 mLockdownTracker.augmentNetworkInfo(info); 1647 } 1648 1649 Intent intent = new Intent(bcastType); 1650 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1651 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1652 if (info.isFailover()) { 1653 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1654 info.setFailover(false); 1655 } 1656 if (info.getReason() != null) { 1657 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1658 } 1659 if (info.getExtraInfo() != null) { 1660 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1661 info.getExtraInfo()); 1662 } 1663 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1664 return intent; 1665 } 1666 1667 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1668 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1669 } 1670 1671 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1672 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1673 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1674 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1675 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1676 final long ident = Binder.clearCallingIdentity(); 1677 try { 1678 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1679 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1680 } finally { 1681 Binder.restoreCallingIdentity(ident); 1682 } 1683 } 1684 1685 private void sendStickyBroadcast(Intent intent) { 1686 synchronized(this) { 1687 if (!mSystemReady) { 1688 mInitialBroadcast = new Intent(intent); 1689 } 1690 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1691 if (VDBG) { 1692 log("sendStickyBroadcast: action=" + intent.getAction()); 1693 } 1694 1695 Bundle options = null; 1696 final long ident = Binder.clearCallingIdentity(); 1697 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1698 final NetworkInfo ni = intent.getParcelableExtra( 1699 ConnectivityManager.EXTRA_NETWORK_INFO); 1700 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1701 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1702 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1703 } else { 1704 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1705 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1706 options = opts.toBundle(); 1707 } 1708 final IBatteryStats bs = BatteryStatsService.getService(); 1709 try { 1710 bs.noteConnectivityChanged(intent.getIntExtra( 1711 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1712 ni != null ? ni.getState().toString() : "?"); 1713 } catch (RemoteException e) { 1714 } 1715 } 1716 try { 1717 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1718 } finally { 1719 Binder.restoreCallingIdentity(ident); 1720 } 1721 } 1722 } 1723 1724 void systemReady() { 1725 loadGlobalProxy(); 1726 1727 synchronized(this) { 1728 mSystemReady = true; 1729 if (mInitialBroadcast != null) { 1730 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1731 mInitialBroadcast = null; 1732 } 1733 } 1734 // load the global proxy at startup 1735 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1736 1737 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1738 // for user to unlock device too. 1739 updateLockdownVpn(); 1740 1741 // Configure whether mobile data is always on. 1742 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1743 1744 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1745 1746 mPermissionMonitor.startMonitoring(); 1747 } 1748 1749 /** 1750 * Setup data activity tracking for the given network. 1751 * 1752 * Every {@code setupDataActivityTracking} should be paired with a 1753 * {@link #removeDataActivityTracking} for cleanup. 1754 */ 1755 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1756 final String iface = networkAgent.linkProperties.getInterfaceName(); 1757 1758 final int timeout; 1759 int type = ConnectivityManager.TYPE_NONE; 1760 1761 if (networkAgent.networkCapabilities.hasTransport( 1762 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1763 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1764 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1765 10); 1766 type = ConnectivityManager.TYPE_MOBILE; 1767 } else if (networkAgent.networkCapabilities.hasTransport( 1768 NetworkCapabilities.TRANSPORT_WIFI)) { 1769 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1770 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1771 15); 1772 type = ConnectivityManager.TYPE_WIFI; 1773 } else { 1774 // do not track any other networks 1775 timeout = 0; 1776 } 1777 1778 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1779 try { 1780 mNetd.addIdleTimer(iface, timeout, type); 1781 } catch (Exception e) { 1782 // You shall not crash! 1783 loge("Exception in setupDataActivityTracking " + e); 1784 } 1785 } 1786 } 1787 1788 /** 1789 * Remove data activity tracking when network disconnects. 1790 */ 1791 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1792 final String iface = networkAgent.linkProperties.getInterfaceName(); 1793 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1794 1795 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1796 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1797 try { 1798 // the call fails silently if no idletimer setup for this interface 1799 mNetd.removeIdleTimer(iface); 1800 } catch (Exception e) { 1801 loge("Exception in removeDataActivityTracking " + e); 1802 } 1803 } 1804 } 1805 1806 /** 1807 * Reads the network specific MTU size from reources. 1808 * and set it on it's iface. 1809 */ 1810 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1811 final String iface = newLp.getInterfaceName(); 1812 final int mtu = newLp.getMtu(); 1813 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1814 if (VDBG) log("identical MTU - not setting"); 1815 return; 1816 } 1817 1818 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1819 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1820 return; 1821 } 1822 1823 // Cannot set MTU without interface name 1824 if (TextUtils.isEmpty(iface)) { 1825 loge("Setting MTU size with null iface."); 1826 return; 1827 } 1828 1829 try { 1830 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1831 mNetd.setMtu(iface, mtu); 1832 } catch (Exception e) { 1833 Slog.e(TAG, "exception in setMtu()" + e); 1834 } 1835 } 1836 1837 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1838 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1839 1840 // Overridden for testing purposes to avoid writing to SystemProperties. 1841 @VisibleForTesting 1842 protected int getDefaultTcpRwnd() { 1843 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1844 } 1845 1846 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1847 if (isDefaultNetwork(nai) == false) { 1848 return; 1849 } 1850 1851 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1852 String[] values = null; 1853 if (tcpBufferSizes != null) { 1854 values = tcpBufferSizes.split(","); 1855 } 1856 1857 if (values == null || values.length != 6) { 1858 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1859 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1860 values = tcpBufferSizes.split(","); 1861 } 1862 1863 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1864 1865 try { 1866 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1867 1868 final String prefix = "/sys/kernel/ipv4/tcp_"; 1869 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1870 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1871 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1872 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1873 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1874 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1875 mCurrentTcpBufferSizes = tcpBufferSizes; 1876 } catch (IOException e) { 1877 loge("Can't set TCP buffer sizes:" + e); 1878 } 1879 1880 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1881 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1882 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1883 if (rwndValue != 0) { 1884 SystemProperties.set(sysctlKey, rwndValue.toString()); 1885 } 1886 } 1887 1888 private void flushVmDnsCache() { 1889 /* 1890 * Tell the VMs to toss their DNS caches 1891 */ 1892 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1893 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1894 /* 1895 * Connectivity events can happen before boot has completed ... 1896 */ 1897 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1898 final long ident = Binder.clearCallingIdentity(); 1899 try { 1900 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1901 } finally { 1902 Binder.restoreCallingIdentity(ident); 1903 } 1904 } 1905 1906 @Override 1907 public int getRestoreDefaultNetworkDelay(int networkType) { 1908 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1909 NETWORK_RESTORE_DELAY_PROP_NAME); 1910 if(restoreDefaultNetworkDelayStr != null && 1911 restoreDefaultNetworkDelayStr.length() != 0) { 1912 try { 1913 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1914 } catch (NumberFormatException e) { 1915 } 1916 } 1917 // if the system property isn't set, use the value for the apn type 1918 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1919 1920 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1921 (mNetConfigs[networkType] != null)) { 1922 ret = mNetConfigs[networkType].restoreTime; 1923 } 1924 return ret; 1925 } 1926 1927 private boolean argsContain(String[] args, String target) { 1928 for (String arg : args) { 1929 if (arg.equals(target)) return true; 1930 } 1931 return false; 1932 } 1933 1934 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1935 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1936 final long DIAG_TIME_MS = 5000; 1937 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1938 // Start gathering diagnostic information. 1939 netDiags.add(new NetworkDiagnostics( 1940 nai.network, 1941 new LinkProperties(nai.linkProperties), // Must be a copy. 1942 DIAG_TIME_MS)); 1943 } 1944 1945 for (NetworkDiagnostics netDiag : netDiags) { 1946 pw.println(); 1947 netDiag.waitForMeasurements(); 1948 netDiag.dump(pw); 1949 } 1950 } 1951 1952 @Override 1953 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1954 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1955 if (mContext.checkCallingOrSelfPermission( 1956 android.Manifest.permission.DUMP) 1957 != PackageManager.PERMISSION_GRANTED) { 1958 pw.println("Permission Denial: can't dump ConnectivityService " + 1959 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1960 Binder.getCallingUid()); 1961 return; 1962 } 1963 1964 if (argsContain(args, "--diag")) { 1965 dumpNetworkDiagnostics(pw); 1966 return; 1967 } 1968 1969 pw.print("NetworkFactories for:"); 1970 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1971 pw.print(" " + nfi.name); 1972 } 1973 pw.println(); 1974 pw.println(); 1975 1976 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1977 pw.print("Active default network: "); 1978 if (defaultNai == null) { 1979 pw.println("none"); 1980 } else { 1981 pw.println(defaultNai.network.netId); 1982 } 1983 pw.println(); 1984 1985 pw.println("Current Networks:"); 1986 pw.increaseIndent(); 1987 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1988 pw.println(nai.toString()); 1989 pw.increaseIndent(); 1990 pw.println(String.format( 1991 "Requests: REQUEST:%d LISTEN:%d BACKGROUND_REQUEST:%d total:%d", 1992 nai.numForegroundNetworkRequests(), 1993 nai.numNetworkRequests() - nai.numRequestNetworkRequests(), 1994 nai.numBackgroundNetworkRequests(), 1995 nai.numNetworkRequests())); 1996 pw.increaseIndent(); 1997 for (int i = 0; i < nai.numNetworkRequests(); i++) { 1998 pw.println(nai.requestAt(i).toString()); 1999 } 2000 pw.decreaseIndent(); 2001 pw.println("Lingered:"); 2002 pw.increaseIndent(); 2003 nai.dumpLingerTimers(pw); 2004 pw.decreaseIndent(); 2005 pw.decreaseIndent(); 2006 } 2007 pw.decreaseIndent(); 2008 pw.println(); 2009 2010 pw.println("Metered Interfaces:"); 2011 pw.increaseIndent(); 2012 for (String value : mMeteredIfaces) { 2013 pw.println(value); 2014 } 2015 pw.decreaseIndent(); 2016 pw.println(); 2017 2018 pw.print("Restrict background: "); 2019 pw.println(mRestrictBackground); 2020 pw.println(); 2021 2022 pw.println("Status for known UIDs:"); 2023 pw.increaseIndent(); 2024 final int size = mUidRules.size(); 2025 for (int i = 0; i < size; i++) { 2026 final int uid = mUidRules.keyAt(i); 2027 pw.print("UID="); 2028 pw.print(uid); 2029 final int uidRules = mUidRules.get(uid, RULE_NONE); 2030 pw.print(" rules="); 2031 pw.print(uidRulesToString(uidRules)); 2032 pw.println(); 2033 } 2034 pw.println(); 2035 pw.decreaseIndent(); 2036 2037 pw.println("Network Requests:"); 2038 pw.increaseIndent(); 2039 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2040 pw.println(nri.toString()); 2041 } 2042 pw.println(); 2043 pw.decreaseIndent(); 2044 2045 mLegacyTypeTracker.dump(pw); 2046 2047 synchronized (this) { 2048 pw.print("mNetTransitionWakeLock: currently " + 2049 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 2050 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 2051 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 2052 } else { 2053 pw.println(", last requested never"); 2054 } 2055 } 2056 2057 pw.println(); 2058 mTethering.dump(fd, pw, args); 2059 2060 pw.println(); 2061 mKeepaliveTracker.dump(pw); 2062 2063 pw.println(); 2064 2065 if (mInetLog != null && mInetLog.size() > 0) { 2066 pw.println(); 2067 pw.println("Inet condition reports:"); 2068 pw.increaseIndent(); 2069 for(int i = 0; i < mInetLog.size(); i++) { 2070 pw.println(mInetLog.get(i)); 2071 } 2072 pw.decreaseIndent(); 2073 } 2074 2075 if (argsContain(args, "--short") == false) { 2076 pw.println(); 2077 synchronized (mValidationLogs) { 2078 pw.println("mValidationLogs (most recent first):"); 2079 for (ValidationLog p : mValidationLogs) { 2080 pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); 2081 pw.increaseIndent(); 2082 p.mLog.dump(fd, pw, args); 2083 pw.decreaseIndent(); 2084 } 2085 } 2086 2087 pw.println(); 2088 pw.println("mNetworkRequestInfoLogs (most recent first):"); 2089 pw.increaseIndent(); 2090 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 2091 pw.decreaseIndent(); 2092 2093 pw.println(); 2094 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 2095 pw.increaseIndent(); 2096 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 2097 pw.decreaseIndent(); 2098 } 2099 } 2100 2101 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 2102 if (nai.network == null) return false; 2103 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 2104 if (officialNai != null && officialNai.equals(nai)) return true; 2105 if (officialNai != null || VDBG) { 2106 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 2107 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 2108 " - " + nai); 2109 } 2110 return false; 2111 } 2112 2113 // must be stateless - things change under us. 2114 private class NetworkStateTrackerHandler extends Handler { 2115 public NetworkStateTrackerHandler(Looper looper) { 2116 super(looper); 2117 } 2118 2119 private boolean maybeHandleAsyncChannelMessage(Message msg) { 2120 switch (msg.what) { 2121 default: 2122 return false; 2123 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2124 handleAsyncChannelHalfConnect(msg); 2125 break; 2126 } 2127 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2128 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2129 if (nai != null) nai.asyncChannel.disconnect(); 2130 break; 2131 } 2132 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2133 handleAsyncChannelDisconnected(msg); 2134 break; 2135 } 2136 } 2137 return true; 2138 } 2139 2140 private void maybeHandleNetworkAgentMessage(Message msg) { 2141 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2142 if (nai == null) { 2143 if (VDBG) { 2144 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 2145 log(String.format("%s from unknown NetworkAgent", what)); 2146 } 2147 return; 2148 } 2149 2150 switch (msg.what) { 2151 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2152 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2153 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2154 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED) || 2155 networkCapabilities.hasCapability(NET_CAPABILITY_FOREGROUND)) { 2156 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2157 } 2158 updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities); 2159 break; 2160 } 2161 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2162 if (VDBG) { 2163 log("Update of LinkProperties for " + nai.name() + 2164 "; created=" + nai.created + 2165 "; everConnected=" + nai.everConnected); 2166 } 2167 LinkProperties oldLp = nai.linkProperties; 2168 synchronized (nai) { 2169 nai.linkProperties = (LinkProperties)msg.obj; 2170 } 2171 if (nai.everConnected) updateLinkProperties(nai, oldLp); 2172 break; 2173 } 2174 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2175 NetworkInfo info = (NetworkInfo) msg.obj; 2176 updateNetworkInfo(nai, info); 2177 break; 2178 } 2179 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2180 Integer score = (Integer) msg.obj; 2181 if (score != null) updateNetworkScore(nai, score.intValue()); 2182 break; 2183 } 2184 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2185 try { 2186 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2187 } catch (Exception e) { 2188 // Never crash! 2189 loge("Exception in addVpnUidRanges: " + e); 2190 } 2191 break; 2192 } 2193 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2194 try { 2195 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2196 } catch (Exception e) { 2197 // Never crash! 2198 loge("Exception in removeVpnUidRanges: " + e); 2199 } 2200 break; 2201 } 2202 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2203 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2204 loge("ERROR: already-connected network explicitly selected."); 2205 } 2206 nai.networkMisc.explicitlySelected = true; 2207 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2208 break; 2209 } 2210 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2211 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2212 break; 2213 } 2214 } 2215 } 2216 2217 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2218 switch (msg.what) { 2219 default: 2220 return false; 2221 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2222 final NetworkAgentInfo nai; 2223 synchronized (mNetworkForNetId) { 2224 nai = mNetworkForNetId.get(msg.arg2); 2225 } 2226 if (nai != null) { 2227 final boolean valid = 2228 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2229 final boolean wasValidated = nai.lastValidated; 2230 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2231 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2232 if (valid != nai.lastValidated) { 2233 final int oldScore = nai.getCurrentScore(); 2234 nai.lastValidated = valid; 2235 nai.everValidated |= valid; 2236 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2237 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2238 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2239 } 2240 updateInetCondition(nai); 2241 // Let the NetworkAgent know the state of its network 2242 Bundle redirectUrlBundle = new Bundle(); 2243 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2244 nai.asyncChannel.sendMessage( 2245 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2246 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2247 0, redirectUrlBundle); 2248 if (wasValidated && !nai.lastValidated) { 2249 handleNetworkUnvalidated(nai); 2250 } 2251 } 2252 break; 2253 } 2254 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2255 final int netId = msg.arg2; 2256 final boolean visible = (msg.arg1 != 0); 2257 final NetworkAgentInfo nai; 2258 synchronized (mNetworkForNetId) { 2259 nai = mNetworkForNetId.get(netId); 2260 } 2261 // If captive portal status has changed, update capabilities. 2262 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2263 final int oldScore = nai.getCurrentScore(); 2264 nai.lastCaptivePortalDetected = visible; 2265 nai.everCaptivePortalDetected |= visible; 2266 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2267 } 2268 if (!visible) { 2269 mNotifier.clearNotification(netId); 2270 } else { 2271 if (nai == null) { 2272 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2273 break; 2274 } 2275 if (!nai.networkMisc.provisioningNotificationDisabled) { 2276 mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null, 2277 (PendingIntent) msg.obj, nai.networkMisc.explicitlySelected); 2278 } 2279 } 2280 break; 2281 } 2282 } 2283 return true; 2284 } 2285 2286 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2287 switch (msg.what) { 2288 default: 2289 return false; 2290 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2291 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2292 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2293 handleLingerComplete(nai); 2294 } 2295 break; 2296 } 2297 } 2298 return true; 2299 } 2300 2301 @Override 2302 public void handleMessage(Message msg) { 2303 if (!maybeHandleAsyncChannelMessage(msg) && 2304 !maybeHandleNetworkMonitorMessage(msg) && 2305 !maybeHandleNetworkAgentInfoMessage(msg)) { 2306 maybeHandleNetworkAgentMessage(msg); 2307 } 2308 } 2309 } 2310 2311 private void updateLingerState(NetworkAgentInfo nai, long now) { 2312 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2313 // 2. If the network was lingering and there are now requests, unlinger it. 2314 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2315 // one lingered request, start lingering. 2316 nai.updateLingerTimer(); 2317 if (nai.isLingering() && nai.numForegroundNetworkRequests() > 0) { 2318 if (DBG) log("Unlingering " + nai.name()); 2319 nai.unlinger(); 2320 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2321 } else if (unneeded(nai, UnneededFor.LINGER) && nai.getLingerExpiry() > 0) { 2322 int lingerTime = (int) (nai.getLingerExpiry() - now); 2323 if (DBG) log("Lingering " + nai.name() + " for " + lingerTime + "ms"); 2324 nai.linger(); 2325 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2326 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2327 } 2328 } 2329 2330 private void handleAsyncChannelHalfConnect(Message msg) { 2331 AsyncChannel ac = (AsyncChannel) msg.obj; 2332 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2333 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2334 if (VDBG) log("NetworkFactory connected"); 2335 // A network factory has connected. Send it all current NetworkRequests. 2336 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2337 if (nri.request.isListen()) continue; 2338 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2339 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2340 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2341 } 2342 } else { 2343 loge("Error connecting NetworkFactory"); 2344 mNetworkFactoryInfos.remove(msg.obj); 2345 } 2346 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2347 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2348 if (VDBG) log("NetworkAgent connected"); 2349 // A network agent has requested a connection. Establish the connection. 2350 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2351 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2352 } else { 2353 loge("Error connecting NetworkAgent"); 2354 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2355 if (nai != null) { 2356 final boolean wasDefault = isDefaultNetwork(nai); 2357 synchronized (mNetworkForNetId) { 2358 mNetworkForNetId.remove(nai.network.netId); 2359 mNetIdInUse.delete(nai.network.netId); 2360 } 2361 // Just in case. 2362 mLegacyTypeTracker.remove(nai, wasDefault); 2363 } 2364 } 2365 } 2366 } 2367 2368 private void handleAsyncChannelDisconnected(Message msg) { 2369 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2370 if (nai != null) { 2371 if (DBG) { 2372 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2373 } 2374 // A network agent has disconnected. 2375 // TODO - if we move the logic to the network agent (have them disconnect 2376 // because they lost all their requests or because their score isn't good) 2377 // then they would disconnect organically, report their new state and then 2378 // disconnect the channel. 2379 if (nai.networkInfo.isConnected()) { 2380 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2381 null, null); 2382 } 2383 final boolean wasDefault = isDefaultNetwork(nai); 2384 if (wasDefault) { 2385 mDefaultInetConditionPublished = 0; 2386 // Log default network disconnection before required book-keeping. 2387 // Let rematchAllNetworksAndRequests() below record a new default network event 2388 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2389 // whose timestamps tell how long it takes to recover a default network. 2390 logDefaultNetworkEvent(null, nai); 2391 } 2392 notifyIfacesChangedForNetworkStats(); 2393 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2394 // by other networks that are already connected. Perhaps that can be done by 2395 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2396 // of rematchAllNetworksAndRequests 2397 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2398 mKeepaliveTracker.handleStopAllKeepalives(nai, 2399 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2400 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2401 mNetworkAgentInfos.remove(msg.replyTo); 2402 updateClat(null, nai.linkProperties, nai); 2403 synchronized (mNetworkForNetId) { 2404 // Remove the NetworkAgent, but don't mark the netId as 2405 // available until we've told netd to delete it below. 2406 mNetworkForNetId.remove(nai.network.netId); 2407 } 2408 // Remove all previously satisfied requests. 2409 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2410 NetworkRequest request = nai.requestAt(i); 2411 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2412 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2413 mNetworkForRequestId.remove(request.requestId); 2414 sendUpdatedScoreToFactories(request, 0); 2415 } 2416 } 2417 nai.clearLingerState(); 2418 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2419 removeDataActivityTracking(nai); 2420 notifyLockdownVpn(nai); 2421 requestNetworkTransitionWakelock(nai.name()); 2422 } 2423 mLegacyTypeTracker.remove(nai, wasDefault); 2424 rematchAllNetworksAndRequests(null, 0); 2425 mLingerMonitor.noteDisconnect(nai); 2426 if (nai.created) { 2427 // Tell netd to clean up the configuration for this network 2428 // (routing rules, DNS, etc). 2429 // This may be slow as it requires a lot of netd shelling out to ip and 2430 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2431 // after we've rematched networks with requests which should make a potential 2432 // fallback network the default or requested a new network from the 2433 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2434 // long time. 2435 try { 2436 mNetd.removeNetwork(nai.network.netId); 2437 } catch (Exception e) { 2438 loge("Exception removing network: " + e); 2439 } 2440 } 2441 synchronized (mNetworkForNetId) { 2442 mNetIdInUse.delete(nai.network.netId); 2443 } 2444 } else { 2445 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2446 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2447 } 2448 } 2449 2450 // If this method proves to be too slow then we can maintain a separate 2451 // pendingIntent => NetworkRequestInfo map. 2452 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2453 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2454 Intent intent = pendingIntent.getIntent(); 2455 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2456 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2457 if (existingPendingIntent != null && 2458 existingPendingIntent.getIntent().filterEquals(intent)) { 2459 return entry.getValue(); 2460 } 2461 } 2462 return null; 2463 } 2464 2465 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2466 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2467 2468 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2469 if (existingRequest != null) { // remove the existing request. 2470 if (DBG) log("Replacing " + existingRequest.request + " with " 2471 + nri.request + " because their intents matched."); 2472 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2473 } 2474 handleRegisterNetworkRequest(nri); 2475 } 2476 2477 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2478 mNetworkRequests.put(nri.request, nri); 2479 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2480 if (nri.request.isListen()) { 2481 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2482 if (nri.request.networkCapabilities.hasSignalStrength() && 2483 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2484 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2485 } 2486 } 2487 } 2488 rematchAllNetworksAndRequests(null, 0); 2489 if (nri.request.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2490 sendUpdatedScoreToFactories(nri.request, 0); 2491 } 2492 } 2493 2494 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2495 int callingUid) { 2496 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2497 if (nri != null) { 2498 handleReleaseNetworkRequest(nri.request, callingUid); 2499 } 2500 } 2501 2502 // Determines whether the network is the best (or could become the best, if it validated), for 2503 // none of a particular type of NetworkRequests. The type of NetworkRequests considered depends 2504 // on the value of reason: 2505 // 2506 // - UnneededFor.TEARDOWN: non-listen NetworkRequests. If a network is unneeded for this reason, 2507 // then it should be torn down. 2508 // - UnneededFor.LINGER: foreground NetworkRequests. If a network is unneeded for this reason, 2509 // then it should be lingered. 2510 private boolean unneeded(NetworkAgentInfo nai, UnneededFor reason) { 2511 final int numRequests; 2512 switch (reason) { 2513 case TEARDOWN: 2514 numRequests = nai.numRequestNetworkRequests(); 2515 break; 2516 case LINGER: 2517 numRequests = nai.numForegroundNetworkRequests(); 2518 break; 2519 default: 2520 Slog.wtf(TAG, "Invalid reason. Cannot happen."); 2521 return true; 2522 } 2523 2524 if (!nai.everConnected || nai.isVPN() || nai.isLingering() || numRequests > 0) { 2525 return false; 2526 } 2527 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2528 if (reason == UnneededFor.LINGER && nri.request.isBackgroundRequest()) { 2529 // Background requests don't affect lingering. 2530 continue; 2531 } 2532 2533 // If this Network is already the highest scoring Network for a request, or if 2534 // there is hope for it to become one if it validated, then it is needed. 2535 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2536 (nai.isSatisfyingRequest(nri.request.requestId) || 2537 // Note that this catches two important cases: 2538 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2539 // is currently satisfying the request. This is desirable when 2540 // cellular ends up validating but WiFi does not. 2541 // 2. Unvalidated WiFi will not be reaped when validated cellular 2542 // is currently satisfying the request. This is desirable when 2543 // WiFi ends up validating and out scoring cellular. 2544 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2545 nai.getCurrentScoreAsValidated())) { 2546 return false; 2547 } 2548 } 2549 return true; 2550 } 2551 2552 private NetworkRequestInfo getNriForAppRequest( 2553 NetworkRequest request, int callingUid, String requestedOperation) { 2554 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2555 2556 if (nri != null) { 2557 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2558 log(String.format("UID %d attempted to %s for unowned request %s", 2559 callingUid, requestedOperation, nri)); 2560 return null; 2561 } 2562 } 2563 2564 return nri; 2565 } 2566 2567 private void handleRequestCallbackUpdate(NetworkRequest request, int callingUid, 2568 String description, int callbackType) { 2569 final NetworkRequestInfo nri = getNriForAppRequest(request, callingUid, description); 2570 if (nri == null) return; 2571 2572 final NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2573 // The network that is satisfying this request may have changed since 2574 // the application requested the update. 2575 // 2576 // - If the request is no longer satisfied, don't send any updates. 2577 // - If the request is satisfied by a different network, it is the 2578 // caller's responsibility to check that the Network object in the 2579 // callback matches the network that was returned in the last 2580 // onAvailable() callback for this request. 2581 if (nai == null) return; 2582 callCallbackForRequest(nri, nai, callbackType, 0); 2583 } 2584 2585 private void handleRequestLinkProperties(NetworkRequest request, int callingUid) { 2586 handleRequestCallbackUpdate(request, callingUid, 2587 "request LinkProperties", ConnectivityManager.CALLBACK_IP_CHANGED); 2588 } 2589 2590 private void handleRequestNetworkCapabilities(NetworkRequest request, int callingUid) { 2591 handleRequestCallbackUpdate(request, callingUid, 2592 "request NetworkCapabilities", ConnectivityManager.CALLBACK_CAP_CHANGED); 2593 } 2594 2595 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2596 final NetworkRequestInfo nri = getNriForAppRequest( 2597 request, callingUid, "release NetworkRequest"); 2598 if (nri == null) return; 2599 2600 if (VDBG || (DBG && nri.request.isRequest())) log("releasing " + request); 2601 nri.unlinkDeathRecipient(); 2602 mNetworkRequests.remove(request); 2603 synchronized (mUidToNetworkRequestCount) { 2604 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2605 if (requests < 1) { 2606 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2607 nri.mUid); 2608 } else if (requests == 1) { 2609 mUidToNetworkRequestCount.removeAt( 2610 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2611 } else { 2612 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2613 } 2614 } 2615 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2616 if (nri.request.isRequest()) { 2617 boolean wasKept = false; 2618 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2619 if (nai != null) { 2620 boolean wasBackgroundNetwork = nai.isBackgroundNetwork(); 2621 nai.removeRequest(nri.request.requestId); 2622 if (VDBG) { 2623 log(" Removing from current network " + nai.name() + 2624 ", leaving " + nai.numNetworkRequests() + " requests."); 2625 } 2626 // If there are still lingered requests on this network, don't tear it down, 2627 // but resume lingering instead. 2628 updateLingerState(nai, SystemClock.elapsedRealtime()); 2629 if (unneeded(nai, UnneededFor.TEARDOWN)) { 2630 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2631 teardownUnneededNetwork(nai); 2632 } else { 2633 wasKept = true; 2634 } 2635 mNetworkForRequestId.remove(nri.request.requestId); 2636 if (!wasBackgroundNetwork && nai.isBackgroundNetwork()) { 2637 // Went from foreground to background. 2638 updateCapabilities(nai.getCurrentScore(), nai, nai.networkCapabilities); 2639 } 2640 } 2641 2642 // TODO: remove this code once we know that the Slog.wtf is never hit. 2643 // 2644 // Find all networks that are satisfying this request and remove the request 2645 // from their request lists. 2646 // TODO - it's my understanding that for a request there is only a single 2647 // network satisfying it, so this loop is wasteful 2648 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2649 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2650 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2651 otherNai.name() + ", but mNetworkAgentInfos says " + 2652 (nai != null ? nai.name() : "null")); 2653 } 2654 } 2655 2656 // Maintain the illusion. When this request arrived, we might have pretended 2657 // that a network connected to serve it, even though the network was already 2658 // connected. Now that this request has gone away, we might have to pretend 2659 // that the network disconnected. LegacyTypeTracker will generate that 2660 // phantom disconnect for this type. 2661 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2662 boolean doRemove = true; 2663 if (wasKept) { 2664 // check if any of the remaining requests for this network are for the 2665 // same legacy type - if so, don't remove the nai 2666 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2667 NetworkRequest otherRequest = nai.requestAt(i); 2668 if (otherRequest.legacyType == nri.request.legacyType && 2669 otherRequest.isRequest()) { 2670 if (DBG) log(" still have other legacy request - leaving"); 2671 doRemove = false; 2672 } 2673 } 2674 } 2675 2676 if (doRemove) { 2677 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2678 } 2679 } 2680 2681 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2682 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2683 nri.request); 2684 } 2685 } else { 2686 // listens don't have a singular affectedNetwork. Check all networks to see 2687 // if this listen request applies and remove it. 2688 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2689 nai.removeRequest(nri.request.requestId); 2690 if (nri.request.networkCapabilities.hasSignalStrength() && 2691 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2692 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2693 } 2694 } 2695 } 2696 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED, 0); 2697 } 2698 2699 @Override 2700 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2701 enforceConnectivityInternalPermission(); 2702 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2703 accept ? 1 : 0, always ? 1: 0, network)); 2704 } 2705 2706 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2707 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2708 " accept=" + accept + " always=" + always); 2709 2710 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2711 if (nai == null) { 2712 // Nothing to do. 2713 return; 2714 } 2715 2716 if (nai.everValidated) { 2717 // The network validated while the dialog box was up. Take no action. 2718 return; 2719 } 2720 2721 if (!nai.networkMisc.explicitlySelected) { 2722 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2723 } 2724 2725 if (accept != nai.networkMisc.acceptUnvalidated) { 2726 int oldScore = nai.getCurrentScore(); 2727 nai.networkMisc.acceptUnvalidated = accept; 2728 rematchAllNetworksAndRequests(nai, oldScore); 2729 sendUpdatedScoreToFactories(nai); 2730 } 2731 2732 if (always) { 2733 nai.asyncChannel.sendMessage( 2734 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2735 } 2736 2737 if (!accept) { 2738 // Tell the NetworkAgent to not automatically reconnect to the network. 2739 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2740 // Teardown the nework. 2741 teardownUnneededNetwork(nai); 2742 } 2743 2744 } 2745 2746 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2747 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2748 mHandler.sendMessageDelayed( 2749 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2750 PROMPT_UNVALIDATED_DELAY_MS); 2751 } 2752 2753 @VisibleForTesting 2754 public boolean avoidBadWifi() { 2755 // There are two modes: either we always automatically avoid unvalidated wifi, or we show a 2756 // dialog and don't switch to it. The behaviour is controlled by the NETWORK_AVOID_BAD_WIFI 2757 // setting. If the setting has no value, then the value is taken from the config value, 2758 // which can be changed via OEM/carrier overlays. 2759 int defaultAvoidBadWifi = 2760 mContext.getResources().getInteger(R.integer.config_networkAvoidBadWifi); 2761 int avoid = Settings.Global.getInt(mContext.getContentResolver(), 2762 Settings.Global.NETWORK_AVOID_BAD_WIFI, defaultAvoidBadWifi); 2763 return avoid == 1; 2764 } 2765 2766 private void showValidationNotification(NetworkAgentInfo nai, NotificationType type) { 2767 final String action; 2768 switch (type) { 2769 case NO_INTERNET: 2770 action = ConnectivityManager.ACTION_PROMPT_UNVALIDATED; 2771 break; 2772 case LOST_INTERNET: 2773 action = ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION; 2774 break; 2775 default: 2776 Slog.wtf(TAG, "Unknown notification type " + type); 2777 return; 2778 } 2779 2780 Intent intent = new Intent(action); 2781 intent.setData(Uri.fromParts("netId", Integer.toString(nai.network.netId), null)); 2782 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2783 intent.setClassName("com.android.settings", 2784 "com.android.settings.wifi.WifiNoInternetDialog"); 2785 2786 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2787 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2788 mNotifier.showNotification(nai.network.netId, type, nai, null, pendingIntent, true); 2789 } 2790 2791 private void handlePromptUnvalidated(Network network) { 2792 if (VDBG) log("handlePromptUnvalidated " + network); 2793 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2794 2795 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2796 // we haven't already been told to switch to it regardless of whether it validated or not. 2797 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2798 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2799 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2800 return; 2801 } 2802 showValidationNotification(nai, NotificationType.NO_INTERNET); 2803 } 2804 2805 // TODO: Delete this like updateMobileDataAlwaysOn above. 2806 @VisibleForTesting 2807 void updateNetworkAvoidBadWifi() { 2808 mHandler.sendEmptyMessage(EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI); 2809 } 2810 2811 private void handleNetworkUnvalidated(NetworkAgentInfo nai) { 2812 NetworkCapabilities nc = nai.networkCapabilities; 2813 if (DBG) log("handleNetworkUnvalidated " + nai.name() + " cap=" + nc); 2814 2815 if (nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) && !avoidBadWifi()) { 2816 showValidationNotification(nai, NotificationType.LOST_INTERNET); 2817 } 2818 } 2819 2820 private class InternalHandler extends Handler { 2821 public InternalHandler(Looper looper) { 2822 super(looper); 2823 } 2824 2825 @Override 2826 public void handleMessage(Message msg) { 2827 switch (msg.what) { 2828 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2829 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2830 String causedBy = null; 2831 synchronized (ConnectivityService.this) { 2832 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2833 mNetTransitionWakeLock.isHeld()) { 2834 mNetTransitionWakeLock.release(); 2835 causedBy = mNetTransitionWakeLockCausedBy; 2836 } else { 2837 break; 2838 } 2839 } 2840 if (VDBG) { 2841 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2842 log("Failed to find a new network - expiring NetTransition Wakelock"); 2843 } else { 2844 log("NetTransition Wakelock (" + 2845 (causedBy == null ? "unknown" : causedBy) + 2846 " cleared because we found a replacement network"); 2847 } 2848 } 2849 break; 2850 } 2851 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2852 handleDeprecatedGlobalHttpProxy(); 2853 break; 2854 } 2855 case EVENT_PROXY_HAS_CHANGED: { 2856 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2857 break; 2858 } 2859 case EVENT_REGISTER_NETWORK_FACTORY: { 2860 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2861 break; 2862 } 2863 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2864 handleUnregisterNetworkFactory((Messenger)msg.obj); 2865 break; 2866 } 2867 case EVENT_REGISTER_NETWORK_AGENT: { 2868 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2869 break; 2870 } 2871 case EVENT_REGISTER_NETWORK_REQUEST: 2872 case EVENT_REGISTER_NETWORK_LISTENER: { 2873 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2874 break; 2875 } 2876 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2877 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2878 handleRegisterNetworkRequestWithIntent(msg); 2879 break; 2880 } 2881 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2882 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2883 break; 2884 } 2885 case EVENT_RELEASE_NETWORK_REQUEST: { 2886 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2887 break; 2888 } 2889 case EVENT_SET_ACCEPT_UNVALIDATED: { 2890 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2891 break; 2892 } 2893 case EVENT_PROMPT_UNVALIDATED: { 2894 handlePromptUnvalidated((Network) msg.obj); 2895 break; 2896 } 2897 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2898 handleMobileDataAlwaysOn(); 2899 break; 2900 } 2901 case EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI: { 2902 rematchAllNetworksAndRequests(null, 0); 2903 break; 2904 } 2905 case EVENT_REQUEST_LINKPROPERTIES: 2906 handleRequestLinkProperties((NetworkRequest) msg.obj, msg.arg1); 2907 break; 2908 case EVENT_REQUEST_NETCAPABILITIES: 2909 handleRequestNetworkCapabilities((NetworkRequest) msg.obj, msg.arg1); 2910 break; 2911 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2912 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2913 mKeepaliveTracker.handleStartKeepalive(msg); 2914 break; 2915 } 2916 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2917 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2918 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2919 int slot = msg.arg1; 2920 int reason = msg.arg2; 2921 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2922 break; 2923 } 2924 case EVENT_SYSTEM_READY: { 2925 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2926 nai.networkMonitor.systemReady = true; 2927 } 2928 break; 2929 } 2930 } 2931 } 2932 } 2933 2934 // javadoc from interface 2935 @Override 2936 public int tether(String iface) { 2937 ConnectivityManager.enforceTetherChangePermission(mContext); 2938 if (isTetheringSupported()) { 2939 final int status = mTethering.tether(iface); 2940 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2941 try { 2942 mPolicyManager.onTetheringChanged(iface, true); 2943 } catch (RemoteException e) { 2944 } 2945 } 2946 return status; 2947 } else { 2948 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2949 } 2950 } 2951 2952 // javadoc from interface 2953 @Override 2954 public int untether(String iface) { 2955 ConnectivityManager.enforceTetherChangePermission(mContext); 2956 2957 if (isTetheringSupported()) { 2958 final int status = mTethering.untether(iface); 2959 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2960 try { 2961 mPolicyManager.onTetheringChanged(iface, false); 2962 } catch (RemoteException e) { 2963 } 2964 } 2965 return status; 2966 } else { 2967 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2968 } 2969 } 2970 2971 // javadoc from interface 2972 @Override 2973 public int getLastTetherError(String iface) { 2974 enforceTetherAccessPermission(); 2975 2976 if (isTetheringSupported()) { 2977 return mTethering.getLastTetherError(iface); 2978 } else { 2979 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2980 } 2981 } 2982 2983 // TODO - proper iface API for selection by property, inspection, etc 2984 @Override 2985 public String[] getTetherableUsbRegexs() { 2986 enforceTetherAccessPermission(); 2987 if (isTetheringSupported()) { 2988 return mTethering.getTetherableUsbRegexs(); 2989 } else { 2990 return new String[0]; 2991 } 2992 } 2993 2994 @Override 2995 public String[] getTetherableWifiRegexs() { 2996 enforceTetherAccessPermission(); 2997 if (isTetheringSupported()) { 2998 return mTethering.getTetherableWifiRegexs(); 2999 } else { 3000 return new String[0]; 3001 } 3002 } 3003 3004 @Override 3005 public String[] getTetherableBluetoothRegexs() { 3006 enforceTetherAccessPermission(); 3007 if (isTetheringSupported()) { 3008 return mTethering.getTetherableBluetoothRegexs(); 3009 } else { 3010 return new String[0]; 3011 } 3012 } 3013 3014 @Override 3015 public int setUsbTethering(boolean enable) { 3016 ConnectivityManager.enforceTetherChangePermission(mContext); 3017 if (isTetheringSupported()) { 3018 return mTethering.setUsbTethering(enable); 3019 } else { 3020 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3021 } 3022 } 3023 3024 // TODO - move iface listing, queries, etc to new module 3025 // javadoc from interface 3026 @Override 3027 public String[] getTetherableIfaces() { 3028 enforceTetherAccessPermission(); 3029 return mTethering.getTetherableIfaces(); 3030 } 3031 3032 @Override 3033 public String[] getTetheredIfaces() { 3034 enforceTetherAccessPermission(); 3035 return mTethering.getTetheredIfaces(); 3036 } 3037 3038 @Override 3039 public String[] getTetheringErroredIfaces() { 3040 enforceTetherAccessPermission(); 3041 return mTethering.getErroredIfaces(); 3042 } 3043 3044 @Override 3045 public String[] getTetheredDhcpRanges() { 3046 enforceConnectivityInternalPermission(); 3047 return mTethering.getTetheredDhcpRanges(); 3048 } 3049 3050 // if ro.tether.denied = true we default to no tethering 3051 // gservices could set the secure setting to 1 though to enable it on a build where it 3052 // had previously been turned off. 3053 @Override 3054 public boolean isTetheringSupported() { 3055 enforceTetherAccessPermission(); 3056 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 3057 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 3058 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 3059 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 3060 return tetherEnabledInSettings && mUserManager.isAdminUser() && 3061 ((mTethering.getTetherableUsbRegexs().length != 0 || 3062 mTethering.getTetherableWifiRegexs().length != 0 || 3063 mTethering.getTetherableBluetoothRegexs().length != 0) && 3064 mTethering.getUpstreamIfaceTypes().length != 0); 3065 } 3066 3067 @Override 3068 public void startTethering(int type, ResultReceiver receiver, 3069 boolean showProvisioningUi) { 3070 ConnectivityManager.enforceTetherChangePermission(mContext); 3071 if (!isTetheringSupported()) { 3072 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 3073 return; 3074 } 3075 mTethering.startTethering(type, receiver, showProvisioningUi); 3076 } 3077 3078 @Override 3079 public void stopTethering(int type) { 3080 ConnectivityManager.enforceTetherChangePermission(mContext); 3081 mTethering.stopTethering(type); 3082 } 3083 3084 // Called when we lose the default network and have no replacement yet. 3085 // This will automatically be cleared after X seconds or a new default network 3086 // becomes CONNECTED, whichever happens first. The timer is started by the 3087 // first caller and not restarted by subsequent callers. 3088 private void requestNetworkTransitionWakelock(String forWhom) { 3089 int serialNum = 0; 3090 synchronized (this) { 3091 if (mNetTransitionWakeLock.isHeld()) return; 3092 serialNum = ++mNetTransitionWakeLockSerialNumber; 3093 mNetTransitionWakeLock.acquire(); 3094 mNetTransitionWakeLockCausedBy = forWhom; 3095 } 3096 mHandler.sendMessageDelayed(mHandler.obtainMessage( 3097 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 3098 mNetTransitionWakeLockTimeout); 3099 return; 3100 } 3101 3102 // 100 percent is full good, 0 is full bad. 3103 @Override 3104 public void reportInetCondition(int networkType, int percentage) { 3105 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 3106 if (nai == null) return; 3107 reportNetworkConnectivity(nai.network, percentage > 50); 3108 } 3109 3110 @Override 3111 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 3112 enforceAccessPermission(); 3113 enforceInternetPermission(); 3114 3115 NetworkAgentInfo nai; 3116 if (network == null) { 3117 nai = getDefaultNetwork(); 3118 } else { 3119 nai = getNetworkAgentInfoForNetwork(network); 3120 } 3121 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 3122 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 3123 return; 3124 } 3125 // Revalidate if the app report does not match our current validated state. 3126 if (hasConnectivity == nai.lastValidated) return; 3127 final int uid = Binder.getCallingUid(); 3128 if (DBG) { 3129 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 3130 ") by " + uid); 3131 } 3132 synchronized (nai) { 3133 // Validating a network that has not yet connected could result in a call to 3134 // rematchNetworkAndRequests() which is not meant to work on such networks. 3135 if (!nai.everConnected) return; 3136 3137 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 3138 3139 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 3140 } 3141 } 3142 3143 private ProxyInfo getDefaultProxy() { 3144 // this information is already available as a world read/writable jvm property 3145 // so this API change wouldn't have a benifit. It also breaks the passing 3146 // of proxy info to all the JVMs. 3147 // enforceAccessPermission(); 3148 synchronized (mProxyLock) { 3149 ProxyInfo ret = mGlobalProxy; 3150 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3151 return ret; 3152 } 3153 } 3154 3155 @Override 3156 public ProxyInfo getProxyForNetwork(Network network) { 3157 if (network == null) return getDefaultProxy(); 3158 final ProxyInfo globalProxy = getGlobalProxy(); 3159 if (globalProxy != null) return globalProxy; 3160 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3161 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3162 // caller may not have. 3163 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3164 if (nai == null) return null; 3165 synchronized (nai) { 3166 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3167 if (proxyInfo == null) return null; 3168 return new ProxyInfo(proxyInfo); 3169 } 3170 } 3171 3172 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3173 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3174 // proxy is null then there is no proxy in place). 3175 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3176 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3177 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3178 proxy = null; 3179 } 3180 return proxy; 3181 } 3182 3183 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3184 // better for determining if a new proxy broadcast is necessary: 3185 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3186 // avoid unnecessary broadcasts. 3187 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3188 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3189 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3190 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3191 // all set. 3192 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3193 a = canonicalizeProxyInfo(a); 3194 b = canonicalizeProxyInfo(b); 3195 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3196 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3197 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3198 } 3199 3200 public void setGlobalProxy(ProxyInfo proxyProperties) { 3201 enforceConnectivityInternalPermission(); 3202 3203 synchronized (mProxyLock) { 3204 if (proxyProperties == mGlobalProxy) return; 3205 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3206 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3207 3208 String host = ""; 3209 int port = 0; 3210 String exclList = ""; 3211 String pacFileUrl = ""; 3212 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3213 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3214 if (!proxyProperties.isValid()) { 3215 if (DBG) 3216 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3217 return; 3218 } 3219 mGlobalProxy = new ProxyInfo(proxyProperties); 3220 host = mGlobalProxy.getHost(); 3221 port = mGlobalProxy.getPort(); 3222 exclList = mGlobalProxy.getExclusionListAsString(); 3223 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3224 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3225 } 3226 } else { 3227 mGlobalProxy = null; 3228 } 3229 ContentResolver res = mContext.getContentResolver(); 3230 final long token = Binder.clearCallingIdentity(); 3231 try { 3232 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3233 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3234 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3235 exclList); 3236 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3237 } finally { 3238 Binder.restoreCallingIdentity(token); 3239 } 3240 3241 if (mGlobalProxy == null) { 3242 proxyProperties = mDefaultProxy; 3243 } 3244 sendProxyBroadcast(proxyProperties); 3245 } 3246 } 3247 3248 private void loadGlobalProxy() { 3249 ContentResolver res = mContext.getContentResolver(); 3250 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3251 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3252 String exclList = Settings.Global.getString(res, 3253 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3254 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3255 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3256 ProxyInfo proxyProperties; 3257 if (!TextUtils.isEmpty(pacFileUrl)) { 3258 proxyProperties = new ProxyInfo(pacFileUrl); 3259 } else { 3260 proxyProperties = new ProxyInfo(host, port, exclList); 3261 } 3262 if (!proxyProperties.isValid()) { 3263 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3264 return; 3265 } 3266 3267 synchronized (mProxyLock) { 3268 mGlobalProxy = proxyProperties; 3269 } 3270 } 3271 } 3272 3273 public ProxyInfo getGlobalProxy() { 3274 // this information is already available as a world read/writable jvm property 3275 // so this API change wouldn't have a benifit. It also breaks the passing 3276 // of proxy info to all the JVMs. 3277 // enforceAccessPermission(); 3278 synchronized (mProxyLock) { 3279 return mGlobalProxy; 3280 } 3281 } 3282 3283 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3284 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3285 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3286 proxy = null; 3287 } 3288 synchronized (mProxyLock) { 3289 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3290 if (mDefaultProxy == proxy) return; // catches repeated nulls 3291 if (proxy != null && !proxy.isValid()) { 3292 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3293 return; 3294 } 3295 3296 // This call could be coming from the PacManager, containing the port of the local 3297 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3298 // global (to get the correct local port), and send a broadcast. 3299 // TODO: Switch PacManager to have its own message to send back rather than 3300 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3301 if ((mGlobalProxy != null) && (proxy != null) 3302 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3303 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3304 mGlobalProxy = proxy; 3305 sendProxyBroadcast(mGlobalProxy); 3306 return; 3307 } 3308 mDefaultProxy = proxy; 3309 3310 if (mGlobalProxy != null) return; 3311 if (!mDefaultProxyDisabled) { 3312 sendProxyBroadcast(proxy); 3313 } 3314 } 3315 } 3316 3317 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3318 // This method gets called when any network changes proxy, but the broadcast only ever contains 3319 // the default proxy (even if it hasn't changed). 3320 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3321 // world where an app might be bound to a non-default network. 3322 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3323 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3324 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3325 3326 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3327 sendProxyBroadcast(getDefaultProxy()); 3328 } 3329 } 3330 3331 private void handleDeprecatedGlobalHttpProxy() { 3332 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3333 Settings.Global.HTTP_PROXY); 3334 if (!TextUtils.isEmpty(proxy)) { 3335 String data[] = proxy.split(":"); 3336 if (data.length == 0) { 3337 return; 3338 } 3339 3340 String proxyHost = data[0]; 3341 int proxyPort = 8080; 3342 if (data.length > 1) { 3343 try { 3344 proxyPort = Integer.parseInt(data[1]); 3345 } catch (NumberFormatException e) { 3346 return; 3347 } 3348 } 3349 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3350 setGlobalProxy(p); 3351 } 3352 } 3353 3354 private void sendProxyBroadcast(ProxyInfo proxy) { 3355 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3356 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3357 if (DBG) log("sending Proxy Broadcast for " + proxy); 3358 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3359 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3360 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3361 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3362 final long ident = Binder.clearCallingIdentity(); 3363 try { 3364 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3365 } finally { 3366 Binder.restoreCallingIdentity(ident); 3367 } 3368 } 3369 3370 private static class SettingsObserver extends ContentObserver { 3371 final private HashMap<Uri, Integer> mUriEventMap; 3372 final private Context mContext; 3373 final private Handler mHandler; 3374 3375 SettingsObserver(Context context, Handler handler) { 3376 super(null); 3377 mUriEventMap = new HashMap<Uri, Integer>(); 3378 mContext = context; 3379 mHandler = handler; 3380 } 3381 3382 void observe(Uri uri, int what) { 3383 mUriEventMap.put(uri, what); 3384 final ContentResolver resolver = mContext.getContentResolver(); 3385 resolver.registerContentObserver(uri, false, this); 3386 } 3387 3388 @Override 3389 public void onChange(boolean selfChange) { 3390 Slog.wtf(TAG, "Should never be reached."); 3391 } 3392 3393 @Override 3394 public void onChange(boolean selfChange, Uri uri) { 3395 final Integer what = mUriEventMap.get(uri); 3396 if (what != null) { 3397 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3398 } else { 3399 loge("No matching event to send for URI=" + uri); 3400 } 3401 } 3402 } 3403 3404 private static void log(String s) { 3405 Slog.d(TAG, s); 3406 } 3407 3408 private static void loge(String s) { 3409 Slog.e(TAG, s); 3410 } 3411 3412 private static <T> T checkNotNull(T value, String message) { 3413 if (value == null) { 3414 throw new NullPointerException(message); 3415 } 3416 return value; 3417 } 3418 3419 /** 3420 * Prepare for a VPN application. 3421 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3422 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3423 * 3424 * @param oldPackage Package name of the application which currently controls VPN, which will 3425 * be replaced. If there is no such application, this should should either be 3426 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3427 * @param newPackage Package name of the application which should gain control of VPN, or 3428 * {@code null} to disable. 3429 * @param userId User for whom to prepare the new VPN. 3430 * 3431 * @hide 3432 */ 3433 @Override 3434 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3435 int userId) { 3436 enforceCrossUserPermission(userId); 3437 throwIfLockdownEnabled(); 3438 3439 synchronized(mVpns) { 3440 Vpn vpn = mVpns.get(userId); 3441 if (vpn != null) { 3442 return vpn.prepare(oldPackage, newPackage); 3443 } else { 3444 return false; 3445 } 3446 } 3447 } 3448 3449 /** 3450 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3451 * This method is used by system-privileged apps. 3452 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3453 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3454 * 3455 * @param packageName The package for which authorization state should change. 3456 * @param userId User for whom {@code packageName} is installed. 3457 * @param authorized {@code true} if this app should be able to start a VPN connection without 3458 * explicit user approval, {@code false} if not. 3459 * 3460 * @hide 3461 */ 3462 @Override 3463 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3464 enforceCrossUserPermission(userId); 3465 3466 synchronized(mVpns) { 3467 Vpn vpn = mVpns.get(userId); 3468 if (vpn != null) { 3469 vpn.setPackageAuthorization(packageName, authorized); 3470 } 3471 } 3472 } 3473 3474 /** 3475 * Configure a TUN interface and return its file descriptor. Parameters 3476 * are encoded and opaque to this class. This method is used by VpnBuilder 3477 * and not available in ConnectivityManager. Permissions are checked in 3478 * Vpn class. 3479 * @hide 3480 */ 3481 @Override 3482 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3483 throwIfLockdownEnabled(); 3484 int user = UserHandle.getUserId(Binder.getCallingUid()); 3485 synchronized(mVpns) { 3486 return mVpns.get(user).establish(config); 3487 } 3488 } 3489 3490 /** 3491 * Start legacy VPN, controlling native daemons as needed. Creates a 3492 * secondary thread to perform connection work, returning quickly. 3493 */ 3494 @Override 3495 public void startLegacyVpn(VpnProfile profile) { 3496 throwIfLockdownEnabled(); 3497 final LinkProperties egress = getActiveLinkProperties(); 3498 if (egress == null) { 3499 throw new IllegalStateException("Missing active network connection"); 3500 } 3501 int user = UserHandle.getUserId(Binder.getCallingUid()); 3502 synchronized(mVpns) { 3503 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3504 } 3505 } 3506 3507 /** 3508 * Return the information of the ongoing legacy VPN. This method is used 3509 * by VpnSettings and not available in ConnectivityManager. Permissions 3510 * are checked in Vpn class. 3511 */ 3512 @Override 3513 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3514 enforceCrossUserPermission(userId); 3515 3516 synchronized(mVpns) { 3517 return mVpns.get(userId).getLegacyVpnInfo(); 3518 } 3519 } 3520 3521 /** 3522 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3523 * and not available in ConnectivityManager. 3524 */ 3525 @Override 3526 public VpnInfo[] getAllVpnInfo() { 3527 enforceConnectivityInternalPermission(); 3528 if (mLockdownEnabled) { 3529 return new VpnInfo[0]; 3530 } 3531 3532 synchronized(mVpns) { 3533 List<VpnInfo> infoList = new ArrayList<>(); 3534 for (int i = 0; i < mVpns.size(); i++) { 3535 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3536 if (info != null) { 3537 infoList.add(info); 3538 } 3539 } 3540 return infoList.toArray(new VpnInfo[infoList.size()]); 3541 } 3542 } 3543 3544 /** 3545 * @return VPN information for accounting, or null if we can't retrieve all required 3546 * information, e.g primary underlying iface. 3547 */ 3548 @Nullable 3549 private VpnInfo createVpnInfo(Vpn vpn) { 3550 VpnInfo info = vpn.getVpnInfo(); 3551 if (info == null) { 3552 return null; 3553 } 3554 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3555 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3556 // the underlyingNetworks list. 3557 if (underlyingNetworks == null) { 3558 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3559 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3560 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3561 } 3562 } else if (underlyingNetworks.length > 0) { 3563 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3564 if (linkProperties != null) { 3565 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3566 } 3567 } 3568 return info.primaryUnderlyingIface == null ? null : info; 3569 } 3570 3571 /** 3572 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3573 * VpnDialogs and not available in ConnectivityManager. 3574 * Permissions are checked in Vpn class. 3575 * @hide 3576 */ 3577 @Override 3578 public VpnConfig getVpnConfig(int userId) { 3579 enforceCrossUserPermission(userId); 3580 synchronized(mVpns) { 3581 Vpn vpn = mVpns.get(userId); 3582 if (vpn != null) { 3583 return vpn.getVpnConfig(); 3584 } else { 3585 return null; 3586 } 3587 } 3588 } 3589 3590 @Override 3591 public boolean updateLockdownVpn() { 3592 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3593 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3594 return false; 3595 } 3596 3597 // Tear down existing lockdown if profile was removed 3598 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3599 if (mLockdownEnabled) { 3600 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3601 final VpnProfile profile = VpnProfile.decode( 3602 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3603 if (profile == null) { 3604 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3605 setLockdownTracker(null); 3606 return true; 3607 } 3608 int user = UserHandle.getUserId(Binder.getCallingUid()); 3609 synchronized(mVpns) { 3610 Vpn vpn = mVpns.get(user); 3611 if (vpn == null) { 3612 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3613 return false; 3614 } 3615 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3616 } 3617 } else { 3618 setLockdownTracker(null); 3619 } 3620 3621 return true; 3622 } 3623 3624 /** 3625 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3626 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3627 */ 3628 private void setLockdownTracker(LockdownVpnTracker tracker) { 3629 // Shutdown any existing tracker 3630 final LockdownVpnTracker existing = mLockdownTracker; 3631 mLockdownTracker = null; 3632 if (existing != null) { 3633 existing.shutdown(); 3634 } 3635 3636 try { 3637 if (tracker != null) { 3638 mNetd.setFirewallEnabled(true); 3639 mNetd.setFirewallInterfaceRule("lo", true); 3640 mLockdownTracker = tracker; 3641 mLockdownTracker.init(); 3642 } else { 3643 mNetd.setFirewallEnabled(false); 3644 } 3645 } catch (RemoteException e) { 3646 // ignored; NMS lives inside system_server 3647 } 3648 } 3649 3650 private void throwIfLockdownEnabled() { 3651 if (mLockdownEnabled) { 3652 throw new IllegalStateException("Unavailable in lockdown mode"); 3653 } 3654 } 3655 3656 /** 3657 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3658 * some setup and then call {@code establish()} to connect. 3659 * 3660 * @return {@code true} if the service was started, the service was already connected, or there 3661 * was no always-on VPN to start. {@code false} otherwise. 3662 */ 3663 private boolean startAlwaysOnVpn(int userId) { 3664 synchronized (mVpns) { 3665 Vpn vpn = mVpns.get(userId); 3666 if (vpn == null) { 3667 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3668 // exists already. 3669 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3670 return false; 3671 } 3672 3673 return vpn.startAlwaysOnVpn(); 3674 } 3675 } 3676 3677 @Override 3678 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3679 enforceConnectivityInternalPermission(); 3680 enforceCrossUserPermission(userId); 3681 3682 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3683 if (LockdownVpnTracker.isEnabled()) { 3684 return false; 3685 } 3686 3687 synchronized (mVpns) { 3688 Vpn vpn = mVpns.get(userId); 3689 if (vpn == null) { 3690 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3691 return false; 3692 } 3693 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3694 return false; 3695 } 3696 if (!startAlwaysOnVpn(userId)) { 3697 vpn.setAlwaysOnPackage(null, false); 3698 return false; 3699 } 3700 3701 vpn.saveAlwaysOnPackage(); 3702 } 3703 return true; 3704 } 3705 3706 @Override 3707 public String getAlwaysOnVpnPackage(int userId) { 3708 enforceConnectivityInternalPermission(); 3709 enforceCrossUserPermission(userId); 3710 3711 synchronized (mVpns) { 3712 Vpn vpn = mVpns.get(userId); 3713 if (vpn == null) { 3714 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3715 return null; 3716 } 3717 return vpn.getAlwaysOnPackage(); 3718 } 3719 } 3720 3721 @Override 3722 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3723 // TODO: Remove? Any reason to trigger a provisioning check? 3724 return -1; 3725 } 3726 3727 /** Location to an updatable file listing carrier provisioning urls. 3728 * An example: 3729 * 3730 * <?xml version="1.0" encoding="utf-8"?> 3731 * <provisioningUrls> 3732 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3733 * </provisioningUrls> 3734 */ 3735 private static final String PROVISIONING_URL_PATH = 3736 "/data/misc/radio/provisioning_urls.xml"; 3737 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3738 3739 /** XML tag for root element. */ 3740 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3741 /** XML tag for individual url */ 3742 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3743 /** XML attribute for mcc */ 3744 private static final String ATTR_MCC = "mcc"; 3745 /** XML attribute for mnc */ 3746 private static final String ATTR_MNC = "mnc"; 3747 3748 private String getProvisioningUrlBaseFromFile() { 3749 FileReader fileReader = null; 3750 XmlPullParser parser = null; 3751 Configuration config = mContext.getResources().getConfiguration(); 3752 3753 try { 3754 fileReader = new FileReader(mProvisioningUrlFile); 3755 parser = Xml.newPullParser(); 3756 parser.setInput(fileReader); 3757 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3758 3759 while (true) { 3760 XmlUtils.nextElement(parser); 3761 3762 String element = parser.getName(); 3763 if (element == null) break; 3764 3765 if (element.equals(TAG_PROVISIONING_URL)) { 3766 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3767 try { 3768 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3769 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3770 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3771 parser.next(); 3772 if (parser.getEventType() == XmlPullParser.TEXT) { 3773 return parser.getText(); 3774 } 3775 } 3776 } 3777 } catch (NumberFormatException e) { 3778 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3779 } 3780 } 3781 } 3782 return null; 3783 } catch (FileNotFoundException e) { 3784 loge("Carrier Provisioning Urls file not found"); 3785 } catch (XmlPullParserException e) { 3786 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3787 } catch (IOException e) { 3788 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3789 } finally { 3790 if (fileReader != null) { 3791 try { 3792 fileReader.close(); 3793 } catch (IOException e) {} 3794 } 3795 } 3796 return null; 3797 } 3798 3799 @Override 3800 public String getMobileProvisioningUrl() { 3801 enforceConnectivityInternalPermission(); 3802 String url = getProvisioningUrlBaseFromFile(); 3803 if (TextUtils.isEmpty(url)) { 3804 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3805 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3806 } else { 3807 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3808 } 3809 // populate the iccid, imei and phone number in the provisioning url. 3810 if (!TextUtils.isEmpty(url)) { 3811 String phoneNumber = mTelephonyManager.getLine1Number(); 3812 if (TextUtils.isEmpty(phoneNumber)) { 3813 phoneNumber = "0000000000"; 3814 } 3815 url = String.format(url, 3816 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3817 mTelephonyManager.getDeviceId() /* IMEI */, 3818 phoneNumber /* Phone numer */); 3819 } 3820 3821 return url; 3822 } 3823 3824 @Override 3825 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3826 String action) { 3827 enforceConnectivityInternalPermission(); 3828 final long ident = Binder.clearCallingIdentity(); 3829 try { 3830 // Concatenate the range of types onto the range of NetIDs. 3831 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3832 mNotifier.setProvNotificationVisible(visible, id, action); 3833 } finally { 3834 Binder.restoreCallingIdentity(ident); 3835 } 3836 } 3837 3838 @Override 3839 public void setAirplaneMode(boolean enable) { 3840 enforceConnectivityInternalPermission(); 3841 final long ident = Binder.clearCallingIdentity(); 3842 try { 3843 final ContentResolver cr = mContext.getContentResolver(); 3844 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3845 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3846 intent.putExtra("state", enable); 3847 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3848 } finally { 3849 Binder.restoreCallingIdentity(ident); 3850 } 3851 } 3852 3853 private void onUserStart(int userId) { 3854 synchronized(mVpns) { 3855 Vpn userVpn = mVpns.get(userId); 3856 if (userVpn != null) { 3857 loge("Starting user already has a VPN"); 3858 return; 3859 } 3860 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3861 mVpns.put(userId, userVpn); 3862 3863 final ContentResolver cr = mContext.getContentResolver(); 3864 String alwaysOnPackage = Settings.Secure.getStringForUser(cr, 3865 Settings.Secure.ALWAYS_ON_VPN_APP, userId); 3866 final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, 3867 Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; 3868 if (alwaysOnPackage != null) { 3869 userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); 3870 } 3871 } 3872 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3873 updateLockdownVpn(); 3874 } 3875 } 3876 3877 private void onUserStop(int userId) { 3878 synchronized(mVpns) { 3879 Vpn userVpn = mVpns.get(userId); 3880 if (userVpn == null) { 3881 loge("Stopped user has no VPN"); 3882 return; 3883 } 3884 userVpn.onUserStopped(); 3885 mVpns.delete(userId); 3886 } 3887 } 3888 3889 private void onUserAdded(int userId) { 3890 synchronized(mVpns) { 3891 final int vpnsSize = mVpns.size(); 3892 for (int i = 0; i < vpnsSize; i++) { 3893 Vpn vpn = mVpns.valueAt(i); 3894 vpn.onUserAdded(userId); 3895 } 3896 } 3897 } 3898 3899 private void onUserRemoved(int userId) { 3900 synchronized(mVpns) { 3901 final int vpnsSize = mVpns.size(); 3902 for (int i = 0; i < vpnsSize; i++) { 3903 Vpn vpn = mVpns.valueAt(i); 3904 vpn.onUserRemoved(userId); 3905 } 3906 } 3907 } 3908 3909 private void onUserUnlocked(int userId) { 3910 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3911 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3912 updateLockdownVpn(); 3913 } else { 3914 startAlwaysOnVpn(userId); 3915 } 3916 } 3917 3918 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3919 @Override 3920 public void onReceive(Context context, Intent intent) { 3921 final String action = intent.getAction(); 3922 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3923 if (userId == UserHandle.USER_NULL) return; 3924 3925 if (Intent.ACTION_USER_STARTED.equals(action)) { 3926 onUserStart(userId); 3927 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3928 onUserStop(userId); 3929 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3930 onUserAdded(userId); 3931 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3932 onUserRemoved(userId); 3933 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3934 onUserUnlocked(userId); 3935 } 3936 } 3937 }; 3938 3939 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3940 new HashMap<Messenger, NetworkFactoryInfo>(); 3941 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3942 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3943 3944 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3945 // Map from UID to number of NetworkRequests that UID has filed. 3946 @GuardedBy("mUidToNetworkRequestCount") 3947 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3948 3949 private static class NetworkFactoryInfo { 3950 public final String name; 3951 public final Messenger messenger; 3952 public final AsyncChannel asyncChannel; 3953 3954 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3955 this.name = name; 3956 this.messenger = messenger; 3957 this.asyncChannel = asyncChannel; 3958 } 3959 } 3960 3961 private void ensureNetworkRequestHasType(NetworkRequest request) { 3962 if (request.type == NetworkRequest.Type.NONE) { 3963 throw new IllegalArgumentException( 3964 "All NetworkRequests in ConnectivityService must have a type"); 3965 } 3966 } 3967 3968 /** 3969 * Tracks info about the requester. 3970 * Also used to notice when the calling process dies so we can self-expire 3971 */ 3972 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3973 final NetworkRequest request; 3974 final PendingIntent mPendingIntent; 3975 boolean mPendingIntentSent; 3976 private final IBinder mBinder; 3977 final int mPid; 3978 final int mUid; 3979 final Messenger messenger; 3980 3981 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 3982 request = r; 3983 ensureNetworkRequestHasType(request); 3984 mPendingIntent = pi; 3985 messenger = null; 3986 mBinder = null; 3987 mPid = getCallingPid(); 3988 mUid = getCallingUid(); 3989 enforceRequestCountLimit(); 3990 } 3991 3992 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 3993 super(); 3994 messenger = m; 3995 request = r; 3996 ensureNetworkRequestHasType(request); 3997 mBinder = binder; 3998 mPid = getCallingPid(); 3999 mUid = getCallingUid(); 4000 mPendingIntent = null; 4001 enforceRequestCountLimit(); 4002 4003 try { 4004 mBinder.linkToDeath(this, 0); 4005 } catch (RemoteException e) { 4006 binderDied(); 4007 } 4008 } 4009 4010 private void enforceRequestCountLimit() { 4011 synchronized (mUidToNetworkRequestCount) { 4012 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 4013 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 4014 throw new IllegalArgumentException("Too many NetworkRequests filed"); 4015 } 4016 mUidToNetworkRequestCount.put(mUid, networkRequests); 4017 } 4018 } 4019 4020 void unlinkDeathRecipient() { 4021 if (mBinder != null) { 4022 mBinder.unlinkToDeath(this, 0); 4023 } 4024 } 4025 4026 public void binderDied() { 4027 log("ConnectivityService NetworkRequestInfo binderDied(" + 4028 request + ", " + mBinder + ")"); 4029 releaseNetworkRequest(request); 4030 } 4031 4032 public String toString() { 4033 return "uid/pid:" + mUid + "/" + mPid + " " + request + 4034 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 4035 } 4036 } 4037 4038 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 4039 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 4040 if (badCapability != null) { 4041 throw new IllegalArgumentException("Cannot request network with " + badCapability); 4042 } 4043 } 4044 4045 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 4046 final SortedSet<Integer> thresholds = new TreeSet(); 4047 synchronized (nai) { 4048 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4049 if (nri.request.networkCapabilities.hasSignalStrength() && 4050 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 4051 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 4052 } 4053 } 4054 } 4055 return new ArrayList<Integer>(thresholds); 4056 } 4057 4058 private void updateSignalStrengthThresholds( 4059 NetworkAgentInfo nai, String reason, NetworkRequest request) { 4060 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 4061 Bundle thresholds = new Bundle(); 4062 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 4063 4064 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 4065 String detail; 4066 if (request != null && request.networkCapabilities.hasSignalStrength()) { 4067 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 4068 } else { 4069 detail = reason; 4070 } 4071 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 4072 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 4073 } 4074 4075 nai.asyncChannel.sendMessage( 4076 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 4077 0, 0, thresholds); 4078 } 4079 4080 @Override 4081 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 4082 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 4083 final NetworkRequest.Type type = (networkCapabilities == null) 4084 ? NetworkRequest.Type.TRACK_DEFAULT 4085 : NetworkRequest.Type.REQUEST; 4086 // If the requested networkCapabilities is null, take them instead from 4087 // the default network request. This allows callers to keep track of 4088 // the system default network. 4089 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 4090 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 4091 enforceAccessPermission(); 4092 } else { 4093 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4094 enforceNetworkRequestPermissions(networkCapabilities); 4095 // TODO: this is incorrect. We mark the request as metered or not depending on the state 4096 // of the app when the request is filed, but we never change the request if the app 4097 // changes network state. http://b/29964605 4098 enforceMeteredApnPolicy(networkCapabilities); 4099 } 4100 ensureRequestableCapabilities(networkCapabilities); 4101 4102 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 4103 throw new IllegalArgumentException("Bad timeout specified"); 4104 } 4105 4106 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 4107 .equals(networkCapabilities.getNetworkSpecifier())) { 4108 throw new IllegalArgumentException("Invalid network specifier - must not be '" 4109 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 4110 } 4111 4112 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4113 nextNetworkRequestId(), type); 4114 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4115 if (DBG) log("requestNetwork for " + nri); 4116 4117 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4118 if (timeoutMs > 0) { 4119 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4120 nri), timeoutMs); 4121 } 4122 return networkRequest; 4123 } 4124 4125 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4126 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4127 enforceConnectivityRestrictedNetworksPermission(); 4128 } else { 4129 enforceChangePermission(); 4130 } 4131 } 4132 4133 @Override 4134 public boolean requestBandwidthUpdate(Network network) { 4135 enforceAccessPermission(); 4136 NetworkAgentInfo nai = null; 4137 if (network == null) { 4138 return false; 4139 } 4140 synchronized (mNetworkForNetId) { 4141 nai = mNetworkForNetId.get(network.netId); 4142 } 4143 if (nai != null) { 4144 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4145 return true; 4146 } 4147 return false; 4148 } 4149 4150 private boolean isSystem(int uid) { 4151 return uid < Process.FIRST_APPLICATION_UID; 4152 } 4153 4154 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4155 final int uid = Binder.getCallingUid(); 4156 if (isSystem(uid)) { 4157 return; 4158 } 4159 // if UID is restricted, don't allow them to bring up metered APNs 4160 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 4161 final int uidRules; 4162 synchronized(mRulesLock) { 4163 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 4164 } 4165 if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 4166 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { 4167 // we could silently fail or we can filter the available nets to only give 4168 // them those they have access to. Chose the more useful option. 4169 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4170 } 4171 } 4172 } 4173 4174 @Override 4175 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4176 PendingIntent operation) { 4177 checkNotNull(operation, "PendingIntent cannot be null."); 4178 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4179 enforceNetworkRequestPermissions(networkCapabilities); 4180 enforceMeteredApnPolicy(networkCapabilities); 4181 ensureRequestableCapabilities(networkCapabilities); 4182 4183 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4184 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4185 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4186 if (DBG) log("pendingRequest for " + nri); 4187 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4188 nri)); 4189 return networkRequest; 4190 } 4191 4192 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4193 mHandler.sendMessageDelayed( 4194 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4195 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4196 } 4197 4198 @Override 4199 public void releasePendingNetworkRequest(PendingIntent operation) { 4200 checkNotNull(operation, "PendingIntent cannot be null."); 4201 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4202 getCallingUid(), 0, operation)); 4203 } 4204 4205 // In order to implement the compatibility measure for pre-M apps that call 4206 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4207 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4208 // This ensures it has permission to do so. 4209 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4210 if (nc == null) { 4211 return false; 4212 } 4213 int[] transportTypes = nc.getTransportTypes(); 4214 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4215 return false; 4216 } 4217 try { 4218 mContext.enforceCallingOrSelfPermission( 4219 android.Manifest.permission.ACCESS_WIFI_STATE, 4220 "ConnectivityService"); 4221 } catch (SecurityException e) { 4222 return false; 4223 } 4224 return true; 4225 } 4226 4227 @Override 4228 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4229 Messenger messenger, IBinder binder) { 4230 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4231 enforceAccessPermission(); 4232 } 4233 4234 NetworkRequest networkRequest = new NetworkRequest( 4235 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4236 NetworkRequest.Type.LISTEN); 4237 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4238 if (VDBG) log("listenForNetwork for " + nri); 4239 4240 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4241 return networkRequest; 4242 } 4243 4244 @Override 4245 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4246 PendingIntent operation) { 4247 checkNotNull(operation, "PendingIntent cannot be null."); 4248 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4249 enforceAccessPermission(); 4250 } 4251 4252 NetworkRequest networkRequest = new NetworkRequest( 4253 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4254 NetworkRequest.Type.LISTEN); 4255 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4256 if (VDBG) log("pendingListenForNetwork for " + nri); 4257 4258 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4259 } 4260 4261 @Override 4262 public void requestLinkProperties(NetworkRequest networkRequest) { 4263 ensureNetworkRequestHasType(networkRequest); 4264 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4265 mHandler.sendMessage(mHandler.obtainMessage( 4266 EVENT_REQUEST_LINKPROPERTIES, getCallingUid(), 0, networkRequest)); 4267 } 4268 4269 @Override 4270 public void requestNetworkCapabilities(NetworkRequest networkRequest) { 4271 ensureNetworkRequestHasType(networkRequest); 4272 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4273 mHandler.sendMessage(mHandler.obtainMessage( 4274 EVENT_REQUEST_NETCAPABILITIES, getCallingUid(), 0, networkRequest)); 4275 } 4276 4277 @Override 4278 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4279 ensureNetworkRequestHasType(networkRequest); 4280 mHandler.sendMessage(mHandler.obtainMessage( 4281 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4282 } 4283 4284 @Override 4285 public void registerNetworkFactory(Messenger messenger, String name) { 4286 enforceConnectivityInternalPermission(); 4287 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4288 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4289 } 4290 4291 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4292 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4293 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4294 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4295 } 4296 4297 @Override 4298 public void unregisterNetworkFactory(Messenger messenger) { 4299 enforceConnectivityInternalPermission(); 4300 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4301 } 4302 4303 private void handleUnregisterNetworkFactory(Messenger messenger) { 4304 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4305 if (nfi == null) { 4306 loge("Failed to find Messenger in unregisterNetworkFactory"); 4307 return; 4308 } 4309 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4310 } 4311 4312 /** 4313 * NetworkAgentInfo supporting a request by requestId. 4314 * These have already been vetted (their Capabilities satisfy the request) 4315 * and the are the highest scored network available. 4316 * the are keyed off the Requests requestId. 4317 */ 4318 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4319 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4320 new SparseArray<NetworkAgentInfo>(); 4321 4322 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4323 @GuardedBy("mNetworkForNetId") 4324 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4325 new SparseArray<NetworkAgentInfo>(); 4326 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4327 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4328 // there may not be a strict 1:1 correlation between the two. 4329 @GuardedBy("mNetworkForNetId") 4330 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4331 4332 // NetworkAgentInfo keyed off its connecting messenger 4333 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4334 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4335 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4336 new HashMap<Messenger, NetworkAgentInfo>(); 4337 4338 @GuardedBy("mBlockedAppUids") 4339 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4340 4341 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4342 private final NetworkRequest mDefaultRequest; 4343 4344 // Request used to optionally keep mobile data active even when higher 4345 // priority networks like Wi-Fi are active. 4346 private final NetworkRequest mDefaultMobileDataRequest; 4347 4348 private NetworkAgentInfo getDefaultNetwork() { 4349 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4350 } 4351 4352 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4353 return nai == getDefaultNetwork(); 4354 } 4355 4356 private boolean isDefaultRequest(NetworkRequestInfo nri) { 4357 return nri.request.requestId == mDefaultRequest.requestId; 4358 } 4359 4360 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4361 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4362 int currentScore, NetworkMisc networkMisc) { 4363 enforceConnectivityInternalPermission(); 4364 4365 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4366 // satisfies mDefaultRequest. 4367 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4368 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4369 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4370 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4371 synchronized (this) { 4372 nai.networkMonitor.systemReady = mSystemReady; 4373 } 4374 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, 4375 networkInfo.getExtraInfo()); 4376 if (DBG) log("registerNetworkAgent " + nai); 4377 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4378 return nai.network.netId; 4379 } 4380 4381 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4382 if (VDBG) log("Got NetworkAgent Messenger"); 4383 mNetworkAgentInfos.put(na.messenger, na); 4384 synchronized (mNetworkForNetId) { 4385 mNetworkForNetId.put(na.network.netId, na); 4386 } 4387 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4388 NetworkInfo networkInfo = na.networkInfo; 4389 na.networkInfo = null; 4390 updateNetworkInfo(na, networkInfo); 4391 } 4392 4393 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4394 LinkProperties newLp = networkAgent.linkProperties; 4395 int netId = networkAgent.network.netId; 4396 4397 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4398 // we do anything else, make sure its LinkProperties are accurate. 4399 if (networkAgent.clatd != null) { 4400 networkAgent.clatd.fixupLinkProperties(oldLp); 4401 } 4402 4403 updateInterfaces(newLp, oldLp, netId); 4404 updateMtu(newLp, oldLp); 4405 // TODO - figure out what to do for clat 4406// for (LinkProperties lp : newLp.getStackedLinks()) { 4407// updateMtu(lp, null); 4408// } 4409 updateTcpBufferSizes(networkAgent); 4410 4411 updateRoutes(newLp, oldLp, netId); 4412 updateDnses(newLp, oldLp, netId); 4413 4414 updateClat(newLp, oldLp, networkAgent); 4415 if (isDefaultNetwork(networkAgent)) { 4416 handleApplyDefaultProxy(newLp.getHttpProxy()); 4417 } else { 4418 updateProxy(newLp, oldLp, networkAgent); 4419 } 4420 // TODO - move this check to cover the whole function 4421 if (!Objects.equals(newLp, oldLp)) { 4422 notifyIfacesChangedForNetworkStats(); 4423 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4424 } 4425 4426 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4427 } 4428 4429 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4430 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4431 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4432 4433 if (!wasRunningClat && shouldRunClat) { 4434 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4435 nai.clatd.start(); 4436 } else if (wasRunningClat && !shouldRunClat) { 4437 nai.clatd.stop(); 4438 } 4439 } 4440 4441 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4442 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4443 if (oldLp != null) { 4444 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4445 } else if (newLp != null) { 4446 interfaceDiff.added = newLp.getAllInterfaceNames(); 4447 } 4448 for (String iface : interfaceDiff.added) { 4449 try { 4450 if (DBG) log("Adding iface " + iface + " to network " + netId); 4451 mNetd.addInterfaceToNetwork(iface, netId); 4452 } catch (Exception e) { 4453 loge("Exception adding interface: " + e); 4454 } 4455 } 4456 for (String iface : interfaceDiff.removed) { 4457 try { 4458 if (DBG) log("Removing iface " + iface + " from network " + netId); 4459 mNetd.removeInterfaceFromNetwork(iface, netId); 4460 } catch (Exception e) { 4461 loge("Exception removing interface: " + e); 4462 } 4463 } 4464 } 4465 4466 /** 4467 * Have netd update routes from oldLp to newLp. 4468 * @return true if routes changed between oldLp and newLp 4469 */ 4470 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4471 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4472 if (oldLp != null) { 4473 routeDiff = oldLp.compareAllRoutes(newLp); 4474 } else if (newLp != null) { 4475 routeDiff.added = newLp.getAllRoutes(); 4476 } 4477 4478 // add routes before removing old in case it helps with continuous connectivity 4479 4480 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4481 for (RouteInfo route : routeDiff.added) { 4482 if (route.hasGateway()) continue; 4483 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4484 try { 4485 mNetd.addRoute(netId, route); 4486 } catch (Exception e) { 4487 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4488 loge("Exception in addRoute for non-gateway: " + e); 4489 } 4490 } 4491 } 4492 for (RouteInfo route : routeDiff.added) { 4493 if (route.hasGateway() == false) continue; 4494 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4495 try { 4496 mNetd.addRoute(netId, route); 4497 } catch (Exception e) { 4498 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4499 loge("Exception in addRoute for gateway: " + e); 4500 } 4501 } 4502 } 4503 4504 for (RouteInfo route : routeDiff.removed) { 4505 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4506 try { 4507 mNetd.removeRoute(netId, route); 4508 } catch (Exception e) { 4509 loge("Exception in removeRoute: " + e); 4510 } 4511 } 4512 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4513 } 4514 4515 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4516 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4517 return; // no updating necessary 4518 } 4519 4520 Collection<InetAddress> dnses = newLp.getDnsServers(); 4521 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4522 try { 4523 mNetd.setDnsConfigurationForNetwork( 4524 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4525 } catch (Exception e) { 4526 loge("Exception in setDnsConfigurationForNetwork: " + e); 4527 } 4528 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4529 if (defaultNai != null && defaultNai.network.netId == netId) { 4530 setDefaultDnsSystemProperties(dnses); 4531 } 4532 flushVmDnsCache(); 4533 } 4534 4535 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4536 int last = 0; 4537 for (InetAddress dns : dnses) { 4538 ++last; 4539 String key = "net.dns" + last; 4540 String value = dns.getHostAddress(); 4541 SystemProperties.set(key, value); 4542 } 4543 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4544 String key = "net.dns" + i; 4545 SystemProperties.set(key, ""); 4546 } 4547 mNumDnsEntries = last; 4548 } 4549 4550 /** 4551 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4552 * augmented with any stateful capabilities implied from {@code networkAgent} 4553 * (e.g., validated status and captive portal status). 4554 * 4555 * @param oldScore score of the network before any of the changes that prompted us 4556 * to call this function. 4557 * @param nai the network having its capabilities updated. 4558 * @param networkCapabilities the new network capabilities. 4559 */ 4560 private void updateCapabilities( 4561 int oldScore, NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4562 if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( 4563 networkCapabilities)) { 4564 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 4565 + nai.networkCapabilities + " -> " + networkCapabilities); 4566 } 4567 4568 // Don't modify caller's NetworkCapabilities. 4569 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4570 if (nai.lastValidated) { 4571 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4572 } else { 4573 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4574 } 4575 if (nai.lastCaptivePortalDetected) { 4576 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4577 } else { 4578 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4579 } 4580 if (nai.isBackgroundNetwork()) { 4581 networkCapabilities.removeCapability(NET_CAPABILITY_FOREGROUND); 4582 } else { 4583 networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 4584 } 4585 4586 if (Objects.equals(nai.networkCapabilities, networkCapabilities)) return; 4587 4588 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4589 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4590 try { 4591 mNetd.setNetworkPermission(nai.network.netId, 4592 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4593 null : NetworkManagementService.PERMISSION_SYSTEM); 4594 } catch (RemoteException e) { 4595 loge("Exception in setNetworkPermission: " + e); 4596 } 4597 } 4598 4599 final NetworkCapabilities prevNc = nai.networkCapabilities; 4600 synchronized (nai) { 4601 nai.networkCapabilities = networkCapabilities; 4602 } 4603 if (nai.getCurrentScore() == oldScore && 4604 networkCapabilities.equalRequestableCapabilities(prevNc)) { 4605 // If the requestable capabilities haven't changed, and the score hasn't changed, then 4606 // the change we're processing can't affect any requests, it can only affect the listens 4607 // on this network. We might have been called by rematchNetworkAndRequests when a 4608 // network changed foreground state. 4609 processListenRequests(nai, true); 4610 } else { 4611 // If the requestable capabilities have changed or the score changed, we can't have been 4612 // called by rematchNetworkAndRequests, so it's safe to start a rematch. 4613 rematchAllNetworksAndRequests(nai, oldScore); 4614 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4615 } 4616 } 4617 4618 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4619 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4620 NetworkRequest nr = nai.requestAt(i); 4621 // Don't send listening requests to factories. b/17393458 4622 if (nr.isListen()) continue; 4623 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4624 } 4625 } 4626 4627 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4628 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4629 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4630 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4631 networkRequest); 4632 } 4633 } 4634 4635 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4636 int notificationType) { 4637 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4638 Intent intent = new Intent(); 4639 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4640 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4641 nri.mPendingIntentSent = true; 4642 sendIntent(nri.mPendingIntent, intent); 4643 } 4644 // else not handled 4645 } 4646 4647 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4648 mPendingIntentWakeLock.acquire(); 4649 try { 4650 if (DBG) log("Sending " + pendingIntent); 4651 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4652 } catch (PendingIntent.CanceledException e) { 4653 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4654 mPendingIntentWakeLock.release(); 4655 releasePendingNetworkRequest(pendingIntent); 4656 } 4657 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4658 } 4659 4660 @Override 4661 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4662 String resultData, Bundle resultExtras) { 4663 if (DBG) log("Finished sending " + pendingIntent); 4664 mPendingIntentWakeLock.release(); 4665 // Release with a delay so the receiving client has an opportunity to put in its 4666 // own request. 4667 releasePendingNetworkRequestWithDelay(pendingIntent); 4668 } 4669 4670 private void callCallbackForRequest(NetworkRequestInfo nri, 4671 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 4672 if (nri.messenger == null) return; // Default request has no msgr 4673 Bundle bundle = new Bundle(); 4674 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4675 new NetworkRequest(nri.request)); 4676 Message msg = Message.obtain(); 4677 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4678 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4679 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4680 } 4681 switch (notificationType) { 4682 case ConnectivityManager.CALLBACK_LOSING: { 4683 msg.arg1 = arg1; 4684 break; 4685 } 4686 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4687 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4688 new NetworkCapabilities(networkAgent.networkCapabilities)); 4689 break; 4690 } 4691 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4692 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4693 new LinkProperties(networkAgent.linkProperties)); 4694 break; 4695 } 4696 } 4697 msg.what = notificationType; 4698 msg.setData(bundle); 4699 try { 4700 if (VDBG) { 4701 log("sending notification " + notifyTypeToName(notificationType) + 4702 " for " + nri.request); 4703 } 4704 nri.messenger.send(msg); 4705 } catch (RemoteException e) { 4706 // may occur naturally in the race of binder death. 4707 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4708 } 4709 } 4710 4711 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4712 if (nai.numRequestNetworkRequests() != 0) { 4713 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4714 NetworkRequest nr = nai.requestAt(i); 4715 // Ignore listening requests. 4716 if (nr.isListen()) continue; 4717 loge("Dead network still had at least " + nr); 4718 break; 4719 } 4720 } 4721 nai.asyncChannel.disconnect(); 4722 } 4723 4724 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4725 if (oldNetwork == null) { 4726 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4727 return; 4728 } 4729 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4730 4731 // If we get here it means that the last linger timeout for this network expired. So there 4732 // must be no other active linger timers, and we must stop lingering. 4733 oldNetwork.clearLingerState(); 4734 4735 if (unneeded(oldNetwork, UnneededFor.TEARDOWN)) { 4736 // Tear the network down. 4737 teardownUnneededNetwork(oldNetwork); 4738 } else { 4739 // Put the network in the background. 4740 updateCapabilities(oldNetwork.getCurrentScore(), oldNetwork, 4741 oldNetwork.networkCapabilities); 4742 } 4743 } 4744 4745 private void makeDefault(NetworkAgentInfo newNetwork) { 4746 if (DBG) log("Switching to new default network: " + newNetwork); 4747 setupDataActivityTracking(newNetwork); 4748 try { 4749 mNetd.setDefaultNetId(newNetwork.network.netId); 4750 } catch (Exception e) { 4751 loge("Exception setting default network :" + e); 4752 } 4753 notifyLockdownVpn(newNetwork); 4754 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4755 updateTcpBufferSizes(newNetwork); 4756 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4757 } 4758 4759 private void processListenRequests(NetworkAgentInfo nai, boolean capabilitiesChanged) { 4760 // For consistency with previous behaviour, send onLost callbacks before onAvailable. 4761 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4762 NetworkRequest nr = nri.request; 4763 if (!nr.isListen()) continue; 4764 if (nai.isSatisfyingRequest(nr.requestId) && !nai.satisfies(nr)) { 4765 nai.removeRequest(nri.request.requestId); 4766 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_LOST, 0); 4767 } 4768 } 4769 4770 if (capabilitiesChanged) { 4771 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4772 } 4773 4774 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4775 NetworkRequest nr = nri.request; 4776 if (!nr.isListen()) continue; 4777 if (nai.satisfies(nr) && !nai.isSatisfyingRequest(nr.requestId)) { 4778 nai.addRequest(nr); 4779 notifyNetworkCallback(nai, nri); 4780 } 4781 } 4782 } 4783 4784 // Handles a network appearing or improving its score. 4785 // 4786 // - Evaluates all current NetworkRequests that can be 4787 // satisfied by newNetwork, and reassigns to newNetwork 4788 // any such requests for which newNetwork is the best. 4789 // 4790 // - Lingers any validated Networks that as a result are no longer 4791 // needed. A network is needed if it is the best network for 4792 // one or more NetworkRequests, or if it is a VPN. 4793 // 4794 // - Tears down newNetwork if it just became validated 4795 // but turns out to be unneeded. 4796 // 4797 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4798 // networks that have no chance (i.e. even if validated) 4799 // of becoming the highest scoring network. 4800 // 4801 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4802 // it does not remove NetworkRequests that other Networks could better satisfy. 4803 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4804 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4805 // as it performs better by a factor of the number of Networks. 4806 // 4807 // @param newNetwork is the network to be matched against NetworkRequests. 4808 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4809 // performed to tear down unvalidated networks that have no chance (i.e. even if 4810 // validated) of becoming the highest scoring network. 4811 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4812 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 4813 if (!newNetwork.everConnected) return; 4814 boolean keep = newNetwork.isVPN(); 4815 boolean isNewDefault = false; 4816 NetworkAgentInfo oldDefaultNetwork = null; 4817 4818 final boolean wasBackgroundNetwork = newNetwork.isBackgroundNetwork(); 4819 final int score = newNetwork.getCurrentScore(); 4820 4821 if (VDBG) log("rematching " + newNetwork.name()); 4822 4823 // Find and migrate to this Network any NetworkRequests for 4824 // which this network is now the best. 4825 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4826 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4827 NetworkCapabilities nc = newNetwork.networkCapabilities; 4828 if (VDBG) log(" network has: " + nc); 4829 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4830 // Process requests in the first pass and listens in the second pass. This allows us to 4831 // change a network's capabilities depending on which requests it has. This is only 4832 // correct if the change in capabilities doesn't affect whether the network satisfies 4833 // requests or not, and doesn't affect the network's score. 4834 if (nri.request.isListen()) continue; 4835 4836 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4837 final boolean satisfies = newNetwork.satisfies(nri.request); 4838 if (newNetwork == currentNetwork && satisfies) { 4839 if (VDBG) { 4840 log("Network " + newNetwork.name() + " was already satisfying" + 4841 " request " + nri.request.requestId + ". No change."); 4842 } 4843 keep = true; 4844 continue; 4845 } 4846 4847 // check if it satisfies the NetworkCapabilities 4848 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4849 if (satisfies) { 4850 // next check if it's better than any current network we're using for 4851 // this request 4852 if (VDBG) { 4853 log("currentScore = " + 4854 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4855 ", newScore = " + score); 4856 } 4857 if (currentNetwork == null || currentNetwork.getCurrentScore() < score) { 4858 if (VDBG) log("rematch for " + newNetwork.name()); 4859 if (currentNetwork != null) { 4860 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4861 currentNetwork.removeRequest(nri.request.requestId); 4862 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 4863 affectedNetworks.add(currentNetwork); 4864 } else { 4865 if (VDBG) log(" accepting network in place of null"); 4866 } 4867 newNetwork.unlingerRequest(nri.request); 4868 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4869 if (!newNetwork.addRequest(nri.request)) { 4870 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4871 } 4872 addedRequests.add(nri); 4873 keep = true; 4874 // Tell NetworkFactories about the new score, so they can stop 4875 // trying to connect if they know they cannot match it. 4876 // TODO - this could get expensive if we have alot of requests for this 4877 // network. Think about if there is a way to reduce this. Push 4878 // netid->request mapping to each factory? 4879 sendUpdatedScoreToFactories(nri.request, score); 4880 if (isDefaultRequest(nri)) { 4881 isNewDefault = true; 4882 oldDefaultNetwork = currentNetwork; 4883 if (currentNetwork != null) { 4884 mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork); 4885 } 4886 } 4887 } 4888 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 4889 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4890 // mark it as no longer satisfying "nri". Because networks are processed by 4891 // rematchAllNetworksAndRequests() in descending score order, "currentNetwork" will 4892 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4893 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4894 // This means this code doesn't have to handle the case where "currentNetwork" no 4895 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4896 if (DBG) { 4897 log("Network " + newNetwork.name() + " stopped satisfying" + 4898 " request " + nri.request.requestId); 4899 } 4900 newNetwork.removeRequest(nri.request.requestId); 4901 if (currentNetwork == newNetwork) { 4902 mNetworkForRequestId.remove(nri.request.requestId); 4903 sendUpdatedScoreToFactories(nri.request, 0); 4904 } else { 4905 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4906 newNetwork.name() + 4907 " without updating mNetworkForRequestId or factories!"); 4908 } 4909 // TODO: Technically, sending CALLBACK_LOST here is 4910 // incorrect if there is a replacement network currently 4911 // connected that can satisfy nri, which is a request 4912 // (not a listen). However, the only capability that can both 4913 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4914 // so this code is only incorrect for a network that loses 4915 // the TRUSTED capability, which is a rare case. 4916 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 4917 } 4918 } 4919 if (isNewDefault) { 4920 // Notify system services that this network is up. 4921 makeDefault(newNetwork); 4922 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 4923 logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); 4924 synchronized (ConnectivityService.this) { 4925 // have a new default network, release the transition wakelock in 4926 // a second if it's held. The second pause is to allow apps 4927 // to reconnect over the new network 4928 if (mNetTransitionWakeLock.isHeld()) { 4929 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4930 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4931 mNetTransitionWakeLockSerialNumber, 0), 4932 1000); 4933 } 4934 } 4935 } 4936 4937 if (!newNetwork.networkCapabilities.equalRequestableCapabilities(nc)) { 4938 Slog.wtf(TAG, String.format( 4939 "BUG: %s changed requestable capabilities during rematch: %s -> %s", 4940 nc, newNetwork.networkCapabilities)); 4941 } 4942 if (newNetwork.getCurrentScore() != score) { 4943 Slog.wtf(TAG, String.format( 4944 "BUG: %s changed score during rematch: %d -> %d", 4945 score, newNetwork.getCurrentScore())); 4946 } 4947 4948 // Second pass: process all listens. 4949 if (wasBackgroundNetwork != newNetwork.isBackgroundNetwork()) { 4950 // If the network went from background to foreground or vice versa, we need to update 4951 // its foreground state. It is safe to do this after rematching the requests because 4952 // NET_CAPABILITY_FOREGROUND does not affect requests, as is not a requestable 4953 // capability and does not affect the network's score (see the Slog.wtf call above). 4954 updateCapabilities(score, newNetwork, newNetwork.networkCapabilities); 4955 } else { 4956 processListenRequests(newNetwork, false); 4957 } 4958 4959 // do this after the default net is switched, but 4960 // before LegacyTypeTracker sends legacy broadcasts 4961 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4962 4963 // Linger any networks that are no longer needed. This should be done after sending the 4964 // available callback for newNetwork. 4965 for (NetworkAgentInfo nai : affectedNetworks) { 4966 updateLingerState(nai, now); 4967 } 4968 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 4969 // does not need to be done in any particular order. 4970 updateLingerState(newNetwork, now); 4971 4972 if (isNewDefault) { 4973 // Maintain the illusion: since the legacy API only 4974 // understands one network at a time, we must pretend 4975 // that the current default network disconnected before 4976 // the new one connected. 4977 if (oldDefaultNetwork != null) { 4978 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4979 oldDefaultNetwork, true); 4980 } 4981 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4982 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4983 notifyLockdownVpn(newNetwork); 4984 } 4985 4986 if (keep) { 4987 // Notify battery stats service about this network, both the normal 4988 // interface and any stacked links. 4989 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4990 try { 4991 final IBatteryStats bs = BatteryStatsService.getService(); 4992 final int type = newNetwork.networkInfo.getType(); 4993 4994 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4995 bs.noteNetworkInterfaceType(baseIface, type); 4996 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4997 final String stackedIface = stacked.getInterfaceName(); 4998 bs.noteNetworkInterfaceType(stackedIface, type); 4999 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 5000 } 5001 } catch (RemoteException ignored) { 5002 } 5003 5004 // This has to happen after the notifyNetworkCallbacks as that tickles each 5005 // ConnectivityManager instance so that legacy requests correctly bind dns 5006 // requests to this network. The legacy users are listening for this bcast 5007 // and will generally do a dns request so they can ensureRouteToHost and if 5008 // they do that before the callbacks happen they'll use the default network. 5009 // 5010 // TODO: Is there still a race here? We send the broadcast 5011 // after sending the callback, but if the app can receive the 5012 // broadcast before the callback, it might still break. 5013 // 5014 // This *does* introduce a race where if the user uses the new api 5015 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 5016 // they may get old info. Reverse this after the old startUsing api is removed. 5017 // This is on top of the multiple intent sequencing referenced in the todo above. 5018 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 5019 NetworkRequest nr = newNetwork.requestAt(i); 5020 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 5021 // legacy type tracker filters out repeat adds 5022 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 5023 } 5024 } 5025 5026 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 5027 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 5028 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 5029 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 5030 if (newNetwork.isVPN()) { 5031 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 5032 } 5033 } 5034 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 5035 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 5036 if (unneeded(nai, UnneededFor.TEARDOWN)) { 5037 if (nai.getLingerExpiry() > 0) { 5038 // This network has active linger timers and no requests, but is not 5039 // lingering. Linger it. 5040 // 5041 // One way (the only way?) this can happen if this network is unvalidated 5042 // and became unneeded due to another network improving its score to the 5043 // point where this network will no longer be able to satisfy any requests 5044 // even if it validates. 5045 updateLingerState(nai, now); 5046 } else { 5047 if (DBG) log("Reaping " + nai.name()); 5048 teardownUnneededNetwork(nai); 5049 } 5050 } 5051 } 5052 } 5053 } 5054 5055 /** 5056 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 5057 * being disconnected. 5058 * @param changed If only one Network's score or capabilities have been modified since the last 5059 * time this function was called, pass this Network in this argument, otherwise pass 5060 * null. 5061 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 5062 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 5063 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 5064 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 5065 * network's score. 5066 */ 5067 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 5068 // TODO: This may get slow. The "changed" parameter is provided for future optimization 5069 // to avoid the slowness. It is not simply enough to process just "changed", for 5070 // example in the case where "changed"'s score decreases and another network should begin 5071 // satifying a NetworkRequest that "changed" currently satisfies. 5072 5073 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 5074 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 5075 // rematchNetworkAndRequests() handles. 5076 final long now = SystemClock.elapsedRealtime(); 5077 if (changed != null && oldScore < changed.getCurrentScore()) { 5078 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 5079 } else { 5080 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 5081 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 5082 // Rematch higher scoring networks first to prevent requests first matching a lower 5083 // scoring network and then a higher scoring network, which could produce multiple 5084 // callbacks and inadvertently unlinger networks. 5085 Arrays.sort(nais); 5086 for (NetworkAgentInfo nai : nais) { 5087 rematchNetworkAndRequests(nai, 5088 // Only reap the last time through the loop. Reaping before all rematching 5089 // is complete could incorrectly teardown a network that hasn't yet been 5090 // rematched. 5091 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 5092 : ReapUnvalidatedNetworks.REAP, 5093 now); 5094 } 5095 } 5096 } 5097 5098 private void updateInetCondition(NetworkAgentInfo nai) { 5099 // Don't bother updating until we've graduated to validated at least once. 5100 if (!nai.everValidated) return; 5101 // For now only update icons for default connection. 5102 // TODO: Update WiFi and cellular icons separately. b/17237507 5103 if (!isDefaultNetwork(nai)) return; 5104 5105 int newInetCondition = nai.lastValidated ? 100 : 0; 5106 // Don't repeat publish. 5107 if (newInetCondition == mDefaultInetConditionPublished) return; 5108 5109 mDefaultInetConditionPublished = newInetCondition; 5110 sendInetConditionBroadcast(nai.networkInfo); 5111 } 5112 5113 private void notifyLockdownVpn(NetworkAgentInfo nai) { 5114 if (mLockdownTracker != null) { 5115 if (nai != null && nai.isVPN()) { 5116 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 5117 } else { 5118 mLockdownTracker.onNetworkInfoChanged(); 5119 } 5120 } 5121 } 5122 5123 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 5124 NetworkInfo.State state = newInfo.getState(); 5125 NetworkInfo oldInfo = null; 5126 final int oldScore = networkAgent.getCurrentScore(); 5127 synchronized (networkAgent) { 5128 oldInfo = networkAgent.networkInfo; 5129 networkAgent.networkInfo = newInfo; 5130 } 5131 notifyLockdownVpn(networkAgent); 5132 5133 if (oldInfo != null && oldInfo.getState() == state) { 5134 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 5135 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 5136 notifyIfacesChangedForNetworkStats(); 5137 } else if (VDBG) log("ignoring duplicate network state non-change"); 5138 // In either case, no further work should be needed. 5139 return; 5140 } 5141 if (DBG) { 5142 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 5143 (oldInfo == null ? "null" : oldInfo.getState()) + 5144 " to " + state); 5145 } 5146 5147 if (!networkAgent.created 5148 && (state == NetworkInfo.State.CONNECTED 5149 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 5150 5151 // A network that has just connected has zero requests and is thus a foreground network. 5152 networkAgent.networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 5153 5154 try { 5155 // This should never fail. Specifying an already in use NetID will cause failure. 5156 if (networkAgent.isVPN()) { 5157 mNetd.createVirtualNetwork(networkAgent.network.netId, 5158 !networkAgent.linkProperties.getDnsServers().isEmpty(), 5159 (networkAgent.networkMisc == null || 5160 !networkAgent.networkMisc.allowBypass)); 5161 } else { 5162 mNetd.createPhysicalNetwork(networkAgent.network.netId, 5163 networkAgent.networkCapabilities.hasCapability( 5164 NET_CAPABILITY_NOT_RESTRICTED) ? 5165 null : NetworkManagementService.PERMISSION_SYSTEM); 5166 } 5167 } catch (Exception e) { 5168 loge("Error creating network " + networkAgent.network.netId + ": " 5169 + e.getMessage()); 5170 return; 5171 } 5172 networkAgent.created = true; 5173 } 5174 5175 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 5176 networkAgent.everConnected = true; 5177 5178 updateLinkProperties(networkAgent, null); 5179 notifyIfacesChangedForNetworkStats(); 5180 5181 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 5182 scheduleUnvalidatedPrompt(networkAgent); 5183 5184 if (networkAgent.isVPN()) { 5185 // Temporarily disable the default proxy (not global). 5186 synchronized (mProxyLock) { 5187 if (!mDefaultProxyDisabled) { 5188 mDefaultProxyDisabled = true; 5189 if (mGlobalProxy == null && mDefaultProxy != null) { 5190 sendProxyBroadcast(null); 5191 } 5192 } 5193 } 5194 // TODO: support proxy per network. 5195 } 5196 5197 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5198 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5199 // capabilities, so it only needs to be done once on initial connect, not every time the 5200 // network's capabilities change. Note that we do this before rematching the network, 5201 // so we could decide to tear it down immediately afterwards. That's fine though - on 5202 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5203 // doing. 5204 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5205 5206 // Consider network even though it is not yet validated. 5207 final long now = SystemClock.elapsedRealtime(); 5208 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5209 5210 // This has to happen after matching the requests, because callbacks are just requests. 5211 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5212 } else if (state == NetworkInfo.State.DISCONNECTED) { 5213 networkAgent.asyncChannel.disconnect(); 5214 if (networkAgent.isVPN()) { 5215 synchronized (mProxyLock) { 5216 if (mDefaultProxyDisabled) { 5217 mDefaultProxyDisabled = false; 5218 if (mGlobalProxy == null && mDefaultProxy != null) { 5219 sendProxyBroadcast(mDefaultProxy); 5220 } 5221 } 5222 } 5223 } 5224 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5225 state == NetworkInfo.State.SUSPENDED) { 5226 // going into or coming out of SUSPEND: rescore and notify 5227 if (networkAgent.getCurrentScore() != oldScore) { 5228 rematchAllNetworksAndRequests(networkAgent, oldScore); 5229 } 5230 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5231 ConnectivityManager.CALLBACK_SUSPENDED : 5232 ConnectivityManager.CALLBACK_RESUMED)); 5233 mLegacyTypeTracker.update(networkAgent); 5234 } 5235 } 5236 5237 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5238 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5239 if (score < 0) { 5240 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5241 "). Bumping score to min of 0"); 5242 score = 0; 5243 } 5244 5245 final int oldScore = nai.getCurrentScore(); 5246 nai.setCurrentScore(score); 5247 5248 rematchAllNetworksAndRequests(nai, oldScore); 5249 5250 sendUpdatedScoreToFactories(nai); 5251 } 5252 5253 // notify only this one new request of the current state 5254 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5255 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 5256 if (nri.mPendingIntent == null) { 5257 callCallbackForRequest(nri, nai, notifyType, 0); 5258 } else { 5259 sendPendingIntentForRequest(nri, nai, notifyType); 5260 } 5261 } 5262 5263 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5264 // The NetworkInfo we actually send out has no bearing on the real 5265 // state of affairs. For example, if the default connection is mobile, 5266 // and a request for HIPRI has just gone away, we need to pretend that 5267 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5268 // the state to DISCONNECTED, even though the network is of type MOBILE 5269 // and is still connected. 5270 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5271 info.setType(type); 5272 if (state != DetailedState.DISCONNECTED) { 5273 info.setDetailedState(state, null, info.getExtraInfo()); 5274 sendConnectedBroadcast(info); 5275 } else { 5276 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5277 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5278 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5279 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5280 if (info.isFailover()) { 5281 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5282 nai.networkInfo.setFailover(false); 5283 } 5284 if (info.getReason() != null) { 5285 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5286 } 5287 if (info.getExtraInfo() != null) { 5288 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5289 } 5290 NetworkAgentInfo newDefaultAgent = null; 5291 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5292 newDefaultAgent = getDefaultNetwork(); 5293 if (newDefaultAgent != null) { 5294 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5295 newDefaultAgent.networkInfo); 5296 } else { 5297 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5298 } 5299 } 5300 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5301 mDefaultInetConditionPublished); 5302 sendStickyBroadcast(intent); 5303 if (newDefaultAgent != null) { 5304 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5305 } 5306 } 5307 } 5308 5309 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5310 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5311 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5312 NetworkRequest nr = networkAgent.requestAt(i); 5313 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5314 if (VDBG) log(" sending notification for " + nr); 5315 // TODO: if we're in the middle of a rematch, can we send a CAP_CHANGED callback for 5316 // a network that no longer satisfies the listen? 5317 if (nri.mPendingIntent == null) { 5318 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5319 } else { 5320 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5321 } 5322 } 5323 } 5324 5325 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5326 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5327 } 5328 5329 private String notifyTypeToName(int notifyType) { 5330 switch (notifyType) { 5331 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5332 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5333 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5334 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5335 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5336 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5337 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5338 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5339 } 5340 return "UNKNOWN"; 5341 } 5342 5343 /** 5344 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5345 * properties tracked by NetworkStatsService on an active iface has changed. 5346 */ 5347 private void notifyIfacesChangedForNetworkStats() { 5348 try { 5349 mStatsService.forceUpdateIfaces(); 5350 } catch (Exception ignored) { 5351 } 5352 } 5353 5354 @Override 5355 public boolean addVpnAddress(String address, int prefixLength) { 5356 throwIfLockdownEnabled(); 5357 int user = UserHandle.getUserId(Binder.getCallingUid()); 5358 synchronized (mVpns) { 5359 return mVpns.get(user).addAddress(address, prefixLength); 5360 } 5361 } 5362 5363 @Override 5364 public boolean removeVpnAddress(String address, int prefixLength) { 5365 throwIfLockdownEnabled(); 5366 int user = UserHandle.getUserId(Binder.getCallingUid()); 5367 synchronized (mVpns) { 5368 return mVpns.get(user).removeAddress(address, prefixLength); 5369 } 5370 } 5371 5372 @Override 5373 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5374 throwIfLockdownEnabled(); 5375 int user = UserHandle.getUserId(Binder.getCallingUid()); 5376 boolean success; 5377 synchronized (mVpns) { 5378 success = mVpns.get(user).setUnderlyingNetworks(networks); 5379 } 5380 if (success) { 5381 notifyIfacesChangedForNetworkStats(); 5382 } 5383 return success; 5384 } 5385 5386 @Override 5387 public String getCaptivePortalServerUrl() { 5388 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5389 } 5390 5391 @Override 5392 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5393 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5394 enforceKeepalivePermission(); 5395 mKeepaliveTracker.startNattKeepalive( 5396 getNetworkAgentInfoForNetwork(network), 5397 intervalSeconds, messenger, binder, 5398 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5399 } 5400 5401 @Override 5402 public void stopKeepalive(Network network, int slot) { 5403 mHandler.sendMessage(mHandler.obtainMessage( 5404 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5405 } 5406 5407 @Override 5408 public void factoryReset() { 5409 enforceConnectivityInternalPermission(); 5410 5411 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5412 return; 5413 } 5414 5415 final int userId = UserHandle.getCallingUserId(); 5416 5417 // Turn airplane mode off 5418 setAirplaneMode(false); 5419 5420 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5421 // Untether 5422 for (String tether : getTetheredIfaces()) { 5423 untether(tether); 5424 } 5425 } 5426 5427 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5428 // Remove always-on package 5429 synchronized (mVpns) { 5430 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5431 if (alwaysOnPackage != null) { 5432 setAlwaysOnVpnPackage(userId, null, false); 5433 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5434 } 5435 } 5436 5437 // Turn VPN off 5438 VpnConfig vpnConfig = getVpnConfig(userId); 5439 if (vpnConfig != null) { 5440 if (vpnConfig.legacy) { 5441 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5442 } else { 5443 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5444 // in the future without user intervention. 5445 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5446 5447 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5448 } 5449 } 5450 } 5451 5452 Settings.Global.putString(mContext.getContentResolver(), 5453 Settings.Global.NETWORK_AVOID_BAD_WIFI, null); 5454 } 5455 5456 @VisibleForTesting 5457 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5458 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5459 return new NetworkMonitor(context, handler, nai, defaultRequest); 5460 } 5461 5462 @VisibleForTesting 5463 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5464 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5465 } 5466 5467 private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5468 int newNetid = NETID_UNSET; 5469 int prevNetid = NETID_UNSET; 5470 int[] transports = new int[0]; 5471 boolean hadIPv4 = false; 5472 boolean hadIPv6 = false; 5473 5474 if (newNai != null) { 5475 newNetid = newNai.network.netId; 5476 transports = newNai.networkCapabilities.getTransportTypes(); 5477 } 5478 if (prevNai != null) { 5479 prevNetid = prevNai.network.netId; 5480 final LinkProperties lp = prevNai.linkProperties; 5481 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5482 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5483 } 5484 5485 mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); 5486 } 5487 5488 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5489 mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); 5490 } 5491} 5492