ConnectivityService.java revision b8167f6b7efe723e495f6fa84a641cd66364cfc3
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 /** Handler thread used for both of the handlers below. */ 402 @VisibleForTesting 403 protected final HandlerThread mHandlerThread; 404 /** Handler used for internal events. */ 405 final private InternalHandler mHandler; 406 /** Handler used for incoming {@link NetworkStateTracker} events. */ 407 final private NetworkStateTrackerHandler mTrackerHandler; 408 409 private boolean mSystemReady; 410 private Intent mInitialBroadcast; 411 412 private PowerManager.WakeLock mNetTransitionWakeLock; 413 private String mNetTransitionWakeLockCausedBy = ""; 414 private int mNetTransitionWakeLockSerialNumber; 415 private int mNetTransitionWakeLockTimeout; 416 private final PowerManager.WakeLock mPendingIntentWakeLock; 417 418 // used in DBG mode to track inet condition reports 419 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 420 private ArrayList mInetLog; 421 422 // track the current default http proxy - tell the world if we get a new one (real change) 423 private volatile ProxyInfo mDefaultProxy = null; 424 private Object mProxyLock = new Object(); 425 private boolean mDefaultProxyDisabled = false; 426 427 // track the global proxy. 428 private ProxyInfo mGlobalProxy = null; 429 430 private PacManager mPacManager = null; 431 432 final private SettingsObserver mSettingsObserver; 433 434 private UserManager mUserManager; 435 436 NetworkConfig[] mNetConfigs; 437 int mNetworksDefined; 438 439 // the set of network types that can only be enabled by system/sig apps 440 List mProtectedNetworks; 441 442 private DataConnectionStats mDataConnectionStats; 443 444 TelephonyManager mTelephonyManager; 445 446 private KeepaliveTracker mKeepaliveTracker; 447 private NetworkNotificationManager mNotifier; 448 private LingerMonitor mLingerMonitor; 449 450 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 451 private final static int MIN_NET_ID = 100; // some reserved marks 452 private final static int MAX_NET_ID = 65535; 453 private int mNextNetId = MIN_NET_ID; 454 455 // sequence number of NetworkRequests 456 private int mNextNetworkRequestId = 1; 457 458 // NetworkRequest activity String log entries. 459 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 460 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 461 462 // NetworkInfo blocked and unblocked String log entries 463 // TODO: consider reducing memory usage. Each log line is ~40 2B chars, for a total of ~8kB. 464 private static final int MAX_NETWORK_INFO_LOGS = 100; 465 private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); 466 467 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 468 private static final int MAX_VALIDATION_LOGS = 10; 469 private static class ValidationLog { 470 final Network mNetwork; 471 final String mNetworkExtraInfo; 472 final ReadOnlyLocalLog mLog; 473 474 ValidationLog(Network network, String networkExtraInfo, ReadOnlyLocalLog log) { 475 mNetwork = network; 476 mNetworkExtraInfo = networkExtraInfo; 477 mLog = log; 478 } 479 } 480 private final ArrayDeque<ValidationLog> mValidationLogs = 481 new ArrayDeque<ValidationLog>(MAX_VALIDATION_LOGS); 482 483 private void addValidationLogs(ReadOnlyLocalLog log, Network network, String networkExtraInfo) { 484 synchronized(mValidationLogs) { 485 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 486 mValidationLogs.removeLast(); 487 } 488 mValidationLogs.addFirst(new ValidationLog(network, networkExtraInfo, log)); 489 } 490 } 491 492 private final IpConnectivityLog mMetricsLog; 493 494 /** 495 * Implements support for the legacy "one network per network type" model. 496 * 497 * We used to have a static array of NetworkStateTrackers, one for each 498 * network type, but that doesn't work any more now that we can have, 499 * for example, more that one wifi network. This class stores all the 500 * NetworkAgentInfo objects that support a given type, but the legacy 501 * API will only see the first one. 502 * 503 * It serves two main purposes: 504 * 505 * 1. Provide information about "the network for a given type" (since this 506 * API only supports one). 507 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 508 * the first network for a given type changes, or if the default network 509 * changes. 510 */ 511 private class LegacyTypeTracker { 512 513 private static final boolean DBG = true; 514 private static final boolean VDBG = false; 515 516 /** 517 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 518 * Each list holds references to all NetworkAgentInfos that are used to 519 * satisfy requests for that network type. 520 * 521 * This array is built out at startup such that an unsupported network 522 * doesn't get an ArrayList instance, making this a tristate: 523 * unsupported, supported but not active and active. 524 * 525 * The actual lists are populated when we scan the network types that 526 * are supported on this device. 527 * 528 * Threading model: 529 * - addSupportedType() is only called in the constructor 530 * - add(), update(), remove() are only called from the ConnectivityService handler thread. 531 * They are therefore not thread-safe with respect to each other. 532 * - getNetworkForType() can be called at any time on binder threads. It is synchronized 533 * on mTypeLists to be thread-safe with respect to a concurrent remove call. 534 * - dump is thread-safe with respect to concurrent add and remove calls. 535 */ 536 private final ArrayList<NetworkAgentInfo> mTypeLists[]; 537 538 public LegacyTypeTracker() { 539 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 540 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 541 } 542 543 public void addSupportedType(int type) { 544 if (mTypeLists[type] != null) { 545 throw new IllegalStateException( 546 "legacy list for type " + type + "already initialized"); 547 } 548 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 549 } 550 551 public boolean isTypeSupported(int type) { 552 return isNetworkTypeValid(type) && mTypeLists[type] != null; 553 } 554 555 public NetworkAgentInfo getNetworkForType(int type) { 556 synchronized (mTypeLists) { 557 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 558 return mTypeLists[type].get(0); 559 } 560 } 561 return null; 562 } 563 564 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 565 boolean isDefaultNetwork) { 566 if (DBG) { 567 log("Sending " + state + 568 " broadcast for type " + type + " " + nai.name() + 569 " isDefaultNetwork=" + isDefaultNetwork); 570 } 571 } 572 573 /** Adds the given network to the specified legacy type list. */ 574 public void add(int type, NetworkAgentInfo nai) { 575 if (!isTypeSupported(type)) { 576 return; // Invalid network type. 577 } 578 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 579 580 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 581 if (list.contains(nai)) { 582 return; 583 } 584 synchronized (mTypeLists) { 585 list.add(nai); 586 } 587 588 // Send a broadcast if this is the first network of its type or if it's the default. 589 final boolean isDefaultNetwork = isDefaultNetwork(nai); 590 if ((list.size() == 1) || isDefaultNetwork) { 591 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 592 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 593 } 594 } 595 596 /** Removes the given network from the specified legacy type list. */ 597 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 598 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 599 if (list == null || list.isEmpty()) { 600 return; 601 } 602 final boolean wasFirstNetwork = list.get(0).equals(nai); 603 604 synchronized (mTypeLists) { 605 if (!list.remove(nai)) { 606 return; 607 } 608 } 609 610 final DetailedState state = DetailedState.DISCONNECTED; 611 612 if (wasFirstNetwork || wasDefault) { 613 maybeLogBroadcast(nai, state, type, wasDefault); 614 sendLegacyNetworkBroadcast(nai, state, type); 615 } 616 617 if (!list.isEmpty() && wasFirstNetwork) { 618 if (DBG) log("Other network available for type " + type + 619 ", sending connected broadcast"); 620 final NetworkAgentInfo replacement = list.get(0); 621 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 622 sendLegacyNetworkBroadcast(replacement, state, type); 623 } 624 } 625 626 /** Removes the given network from all legacy type lists. */ 627 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 628 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 629 for (int type = 0; type < mTypeLists.length; type++) { 630 remove(type, nai, wasDefault); 631 } 632 } 633 634 // send out another legacy broadcast - currently only used for suspend/unsuspend 635 // toggle 636 public void update(NetworkAgentInfo nai) { 637 final boolean isDefault = isDefaultNetwork(nai); 638 final DetailedState state = nai.networkInfo.getDetailedState(); 639 for (int type = 0; type < mTypeLists.length; type++) { 640 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 641 final boolean contains = (list != null && list.contains(nai)); 642 final boolean isFirst = contains && (nai == list.get(0)); 643 if (isFirst || contains && isDefault) { 644 maybeLogBroadcast(nai, state, type, isDefault); 645 sendLegacyNetworkBroadcast(nai, state, type); 646 } 647 } 648 } 649 650 private String naiToString(NetworkAgentInfo nai) { 651 String name = (nai != null) ? nai.name() : "null"; 652 String state = (nai.networkInfo != null) ? 653 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 654 "???/???"; 655 return name + " " + state; 656 } 657 658 public void dump(IndentingPrintWriter pw) { 659 pw.println("mLegacyTypeTracker:"); 660 pw.increaseIndent(); 661 pw.print("Supported types:"); 662 for (int type = 0; type < mTypeLists.length; type++) { 663 if (mTypeLists[type] != null) pw.print(" " + type); 664 } 665 pw.println(); 666 pw.println("Current state:"); 667 pw.increaseIndent(); 668 synchronized (mTypeLists) { 669 for (int type = 0; type < mTypeLists.length; type++) { 670 if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; 671 for (NetworkAgentInfo nai : mTypeLists[type]) { 672 pw.println(type + " " + naiToString(nai)); 673 } 674 } 675 } 676 pw.decreaseIndent(); 677 pw.decreaseIndent(); 678 pw.println(); 679 } 680 } 681 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 682 683 @VisibleForTesting 684 protected HandlerThread createHandlerThread() { 685 return new HandlerThread("ConnectivityServiceThread"); 686 } 687 688 public ConnectivityService(Context context, INetworkManagementService netManager, 689 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 690 this(context, netManager, statsService, policyManager, new IpConnectivityLog()); 691 } 692 693 @VisibleForTesting 694 protected ConnectivityService(Context context, INetworkManagementService netManager, 695 INetworkStatsService statsService, INetworkPolicyManager policyManager, 696 IpConnectivityLog logger) { 697 if (DBG) log("ConnectivityService starting up"); 698 699 mMetricsLog = logger; 700 mDefaultRequest = createInternetRequestForTransport(-1, NetworkRequest.Type.REQUEST); 701 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); 702 mNetworkRequests.put(mDefaultRequest, defaultNRI); 703 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 704 705 mDefaultMobileDataRequest = createInternetRequestForTransport( 706 NetworkCapabilities.TRANSPORT_CELLULAR, NetworkRequest.Type.BACKGROUND_REQUEST); 707 708 mHandlerThread = createHandlerThread(); 709 mHandlerThread.start(); 710 mHandler = new InternalHandler(mHandlerThread.getLooper()); 711 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 712 713 // setup our unique device name 714 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 715 String id = Settings.Secure.getString(context.getContentResolver(), 716 Settings.Secure.ANDROID_ID); 717 if (id != null && id.length() > 0) { 718 String name = new String("android-").concat(id); 719 SystemProperties.set("net.hostname", name); 720 } 721 } 722 723 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 724 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 725 726 mLingerDelayMs = SystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); 727 728 mContext = checkNotNull(context, "missing Context"); 729 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 730 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 731 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 732 mKeyStore = KeyStore.getInstance(); 733 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 734 735 try { 736 mPolicyManager.setConnectivityListener(mPolicyListener); 737 mRestrictBackground = mPolicyManager.getRestrictBackground(); 738 } catch (RemoteException e) { 739 // ouch, no rules updates means some processes may never get network 740 loge("unable to register INetworkPolicyListener" + e); 741 } 742 743 final PowerManager powerManager = (PowerManager) context.getSystemService( 744 Context.POWER_SERVICE); 745 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 746 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 747 com.android.internal.R.integer.config_networkTransitionTimeout); 748 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 749 750 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 751 752 // TODO: What is the "correct" way to do determine if this is a wifi only device? 753 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 754 log("wifiOnly=" + wifiOnly); 755 String[] naStrings = context.getResources().getStringArray( 756 com.android.internal.R.array.networkAttributes); 757 for (String naString : naStrings) { 758 try { 759 NetworkConfig n = new NetworkConfig(naString); 760 if (VDBG) log("naString=" + naString + " config=" + n); 761 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 762 loge("Error in networkAttributes - ignoring attempt to define type " + 763 n.type); 764 continue; 765 } 766 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 767 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 768 n.type); 769 continue; 770 } 771 if (mNetConfigs[n.type] != null) { 772 loge("Error in networkAttributes - ignoring attempt to redefine type " + 773 n.type); 774 continue; 775 } 776 mLegacyTypeTracker.addSupportedType(n.type); 777 778 mNetConfigs[n.type] = n; 779 mNetworksDefined++; 780 } catch(Exception e) { 781 // ignore it - leave the entry null 782 } 783 } 784 785 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 786 if (mNetConfigs[TYPE_VPN] == null) { 787 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 788 // don't need to add TYPE_VPN to mNetConfigs. 789 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 790 mNetworksDefined++; // used only in the log() statement below. 791 } 792 793 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 794 795 mProtectedNetworks = new ArrayList<Integer>(); 796 int[] protectedNetworks = context.getResources().getIntArray( 797 com.android.internal.R.array.config_protectedNetworks); 798 for (int p : protectedNetworks) { 799 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 800 mProtectedNetworks.add(p); 801 } else { 802 if (DBG) loge("Ignoring protectedNetwork " + p); 803 } 804 } 805 806 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 807 && SystemProperties.get("ro.build.type").equals("eng"); 808 809 mTethering = new Tethering(mContext, mNetd, statsService); 810 811 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 812 813 //set up the listener for user state for creating user VPNs 814 IntentFilter intentFilter = new IntentFilter(); 815 intentFilter.addAction(Intent.ACTION_USER_STARTED); 816 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 817 intentFilter.addAction(Intent.ACTION_USER_ADDED); 818 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 819 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 820 mContext.registerReceiverAsUser( 821 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 822 823 try { 824 mNetd.registerObserver(mTethering); 825 mNetd.registerObserver(mDataActivityObserver); 826 } catch (RemoteException e) { 827 loge("Error registering observer :" + e); 828 } 829 830 if (DBG) { 831 mInetLog = new ArrayList(); 832 } 833 834 mSettingsObserver = new SettingsObserver(mContext, mHandler); 835 registerSettingsCallbacks(); 836 837 mDataConnectionStats = new DataConnectionStats(mContext); 838 mDataConnectionStats.startMonitoring(); 839 840 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 841 842 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 843 844 mKeepaliveTracker = new KeepaliveTracker(mHandler); 845 mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager, 846 mContext.getSystemService(NotificationManager.class)); 847 848 final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(), 849 Settings.Global.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT, 850 LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT); 851 final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(), 852 Settings.Global.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS, 853 LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS); 854 mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit); 855 } 856 857 private NetworkRequest createInternetRequestForTransport( 858 int transportType, NetworkRequest.Type type) { 859 NetworkCapabilities netCap = new NetworkCapabilities(); 860 netCap.addCapability(NET_CAPABILITY_INTERNET); 861 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 862 if (transportType > -1) { 863 netCap.addTransportType(transportType); 864 } 865 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type); 866 } 867 868 // Used only for testing. 869 // TODO: Delete this and either: 870 // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires 871 // changing ContentResolver to make registerContentObserver non-final). 872 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 873 // by subclassing SettingsObserver. 874 @VisibleForTesting 875 void updateMobileDataAlwaysOn() { 876 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 877 } 878 879 private void handleMobileDataAlwaysOn() { 880 final boolean enable = (Settings.Global.getInt( 881 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 882 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 883 if (enable == isEnabled) { 884 return; // Nothing to do. 885 } 886 887 if (enable) { 888 handleRegisterNetworkRequest(new NetworkRequestInfo( 889 null, mDefaultMobileDataRequest, new Binder())); 890 } else { 891 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 892 } 893 } 894 895 private void registerSettingsCallbacks() { 896 // Watch for global HTTP proxy changes. 897 mSettingsObserver.observe( 898 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 899 EVENT_APPLY_GLOBAL_HTTP_PROXY); 900 901 // Watch for whether or not to keep mobile data always on. 902 mSettingsObserver.observe( 903 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 904 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 905 } 906 907 private synchronized int nextNetworkRequestId() { 908 return mNextNetworkRequestId++; 909 } 910 911 @VisibleForTesting 912 protected int reserveNetId() { 913 synchronized (mNetworkForNetId) { 914 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 915 int netId = mNextNetId; 916 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 917 // Make sure NetID unused. http://b/16815182 918 if (!mNetIdInUse.get(netId)) { 919 mNetIdInUse.put(netId, true); 920 return netId; 921 } 922 } 923 } 924 throw new IllegalStateException("No free netIds"); 925 } 926 927 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 928 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 929 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 930 final NetworkState state; 931 if (nai != null) { 932 state = nai.getNetworkState(); 933 state.networkInfo.setType(networkType); 934 } else { 935 final NetworkInfo info = new NetworkInfo(networkType, 0, 936 getNetworkTypeName(networkType), ""); 937 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 938 info.setIsAvailable(true); 939 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 940 null, null, null); 941 } 942 filterNetworkStateForUid(state, uid, ignoreBlocked); 943 return state; 944 } else { 945 return NetworkState.EMPTY; 946 } 947 } 948 949 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 950 if (network == null) { 951 return null; 952 } 953 synchronized (mNetworkForNetId) { 954 return mNetworkForNetId.get(network.netId); 955 } 956 } 957 958 private Network[] getVpnUnderlyingNetworks(int uid) { 959 if (!mLockdownEnabled) { 960 int user = UserHandle.getUserId(uid); 961 synchronized (mVpns) { 962 Vpn vpn = mVpns.get(user); 963 if (vpn != null && vpn.appliesToUid(uid)) { 964 return vpn.getUnderlyingNetworks(); 965 } 966 } 967 } 968 return null; 969 } 970 971 private NetworkState getUnfilteredActiveNetworkState(int uid) { 972 NetworkAgentInfo nai = getDefaultNetwork(); 973 974 final Network[] networks = getVpnUnderlyingNetworks(uid); 975 if (networks != null) { 976 // getUnderlyingNetworks() returns: 977 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 978 // empty array => the VPN explicitly said "no default network". 979 // non-empty array => the VPN specified one or more default networks; we use the 980 // first one. 981 if (networks.length > 0) { 982 nai = getNetworkAgentInfoForNetwork(networks[0]); 983 } else { 984 nai = null; 985 } 986 } 987 988 if (nai != null) { 989 return nai.getNetworkState(); 990 } else { 991 return NetworkState.EMPTY; 992 } 993 } 994 995 /** 996 * Check if UID should be blocked from using the network with the given LinkProperties. 997 */ 998 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 999 boolean ignoreBlocked) { 1000 // Networks aren't blocked when ignoring blocked status 1001 if (ignoreBlocked) return false; 1002 // Networks are never blocked for system services 1003 if (isSystem(uid)) return false; 1004 1005 final boolean networkMetered; 1006 final int uidRules; 1007 1008 synchronized (mVpns) { 1009 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 1010 if (vpn != null && vpn.isBlockingUid(uid)) { 1011 return true; 1012 } 1013 } 1014 1015 final String iface = (lp == null ? "" : lp.getInterfaceName()); 1016 synchronized (mRulesLock) { 1017 networkMetered = mMeteredIfaces.contains(iface); 1018 uidRules = mUidRules.get(uid, RULE_NONE); 1019 } 1020 1021 boolean allowed = true; 1022 // Check Data Saver Mode first... 1023 if (networkMetered) { 1024 if ((uidRules & RULE_REJECT_METERED) != 0) { 1025 if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); 1026 // Explicitly blacklisted. 1027 allowed = false; 1028 } else { 1029 allowed = !mRestrictBackground 1030 || (uidRules & RULE_ALLOW_METERED) != 0 1031 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; 1032 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1033 + " mRestrictBackground=" + mRestrictBackground 1034 + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) 1035 + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" 1036 + ": " + allowed); 1037 } 1038 } 1039 // ...then power restrictions. 1040 if (allowed) { 1041 allowed = (uidRules & RULE_REJECT_ALL) == 0; 1042 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1043 + " rule is " + uidRulesToString(uidRules) + ": " + allowed); 1044 } 1045 return !allowed; 1046 } 1047 1048 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1049 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1050 return; 1051 } 1052 boolean removed = false; 1053 boolean added = false; 1054 synchronized (mBlockedAppUids) { 1055 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1056 added = true; 1057 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1058 removed = true; 1059 } 1060 } 1061 if (added) { 1062 log("Returning blocked NetworkInfo to uid=" + uid); 1063 mNetworkInfoBlockingLogs.log("BLOCKED " + uid); 1064 } else if (removed) { 1065 log("Returning unblocked NetworkInfo to uid=" + uid); 1066 mNetworkInfoBlockingLogs.log("UNBLOCKED " + uid); 1067 } 1068 } 1069 1070 /** 1071 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1072 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1073 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 1074 * {@link NetworkInfo#isMetered()} based on network policies. 1075 */ 1076 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1077 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1078 1079 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1080 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1081 } 1082 if (mLockdownTracker != null) { 1083 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1084 } 1085 1086 // TODO: apply metered state closer to NetworkAgentInfo 1087 final long token = Binder.clearCallingIdentity(); 1088 try { 1089 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 1090 } catch (RemoteException e) { 1091 } finally { 1092 Binder.restoreCallingIdentity(token); 1093 } 1094 } 1095 1096 /** 1097 * Return NetworkInfo for the active (i.e., connected) network interface. 1098 * It is assumed that at most one network is active at a time. If more 1099 * than one is active, it is indeterminate which will be returned. 1100 * @return the info for the active network, or {@code null} if none is 1101 * active 1102 */ 1103 @Override 1104 public NetworkInfo getActiveNetworkInfo() { 1105 enforceAccessPermission(); 1106 final int uid = Binder.getCallingUid(); 1107 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1108 filterNetworkStateForUid(state, uid, false); 1109 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1110 return state.networkInfo; 1111 } 1112 1113 @Override 1114 public Network getActiveNetwork() { 1115 enforceAccessPermission(); 1116 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1117 } 1118 1119 @Override 1120 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1121 enforceConnectivityInternalPermission(); 1122 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1123 } 1124 1125 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1126 final int user = UserHandle.getUserId(uid); 1127 int vpnNetId = NETID_UNSET; 1128 synchronized (mVpns) { 1129 final Vpn vpn = mVpns.get(user); 1130 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1131 } 1132 NetworkAgentInfo nai; 1133 if (vpnNetId != NETID_UNSET) { 1134 synchronized (mNetworkForNetId) { 1135 nai = mNetworkForNetId.get(vpnNetId); 1136 } 1137 if (nai != null) return nai.network; 1138 } 1139 nai = getDefaultNetwork(); 1140 if (nai != null 1141 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1142 nai = null; 1143 } 1144 return nai != null ? nai.network : null; 1145 } 1146 1147 // Public because it's used by mLockdownTracker. 1148 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1149 enforceAccessPermission(); 1150 final int uid = Binder.getCallingUid(); 1151 NetworkState state = getUnfilteredActiveNetworkState(uid); 1152 return state.networkInfo; 1153 } 1154 1155 @Override 1156 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1157 enforceConnectivityInternalPermission(); 1158 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1159 filterNetworkStateForUid(state, uid, ignoreBlocked); 1160 return state.networkInfo; 1161 } 1162 1163 @Override 1164 public NetworkInfo getNetworkInfo(int networkType) { 1165 enforceAccessPermission(); 1166 final int uid = Binder.getCallingUid(); 1167 if (getVpnUnderlyingNetworks(uid) != null) { 1168 // A VPN is active, so we may need to return one of its underlying networks. This 1169 // information is not available in LegacyTypeTracker, so we have to get it from 1170 // getUnfilteredActiveNetworkState. 1171 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1172 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1173 filterNetworkStateForUid(state, uid, false); 1174 return state.networkInfo; 1175 } 1176 } 1177 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1178 return state.networkInfo; 1179 } 1180 1181 @Override 1182 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1183 enforceAccessPermission(); 1184 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1185 if (nai != null) { 1186 final NetworkState state = nai.getNetworkState(); 1187 filterNetworkStateForUid(state, uid, ignoreBlocked); 1188 return state.networkInfo; 1189 } else { 1190 return null; 1191 } 1192 } 1193 1194 @Override 1195 public NetworkInfo[] getAllNetworkInfo() { 1196 enforceAccessPermission(); 1197 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1198 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1199 networkType++) { 1200 NetworkInfo info = getNetworkInfo(networkType); 1201 if (info != null) { 1202 result.add(info); 1203 } 1204 } 1205 return result.toArray(new NetworkInfo[result.size()]); 1206 } 1207 1208 @Override 1209 public Network getNetworkForType(int networkType) { 1210 enforceAccessPermission(); 1211 final int uid = Binder.getCallingUid(); 1212 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1213 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1214 return state.network; 1215 } 1216 return null; 1217 } 1218 1219 @Override 1220 public Network[] getAllNetworks() { 1221 enforceAccessPermission(); 1222 synchronized (mNetworkForNetId) { 1223 final Network[] result = new Network[mNetworkForNetId.size()]; 1224 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1225 result[i] = mNetworkForNetId.valueAt(i).network; 1226 } 1227 return result; 1228 } 1229 } 1230 1231 @Override 1232 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1233 // The basic principle is: if an app's traffic could possibly go over a 1234 // network, without the app doing anything multinetwork-specific, 1235 // (hence, by "default"), then include that network's capabilities in 1236 // the array. 1237 // 1238 // In the normal case, app traffic only goes over the system's default 1239 // network connection, so that's the only network returned. 1240 // 1241 // With a VPN in force, some app traffic may go into the VPN, and thus 1242 // over whatever underlying networks the VPN specifies, while other app 1243 // traffic may go over the system default network (e.g.: a split-tunnel 1244 // VPN, or an app disallowed by the VPN), so the set of networks 1245 // returned includes the VPN's underlying networks and the system 1246 // default. 1247 enforceAccessPermission(); 1248 1249 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1250 1251 NetworkAgentInfo nai = getDefaultNetwork(); 1252 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1253 if (nc != null) { 1254 result.put(nai.network, nc); 1255 } 1256 1257 if (!mLockdownEnabled) { 1258 synchronized (mVpns) { 1259 Vpn vpn = mVpns.get(userId); 1260 if (vpn != null) { 1261 Network[] networks = vpn.getUnderlyingNetworks(); 1262 if (networks != null) { 1263 for (Network network : networks) { 1264 nai = getNetworkAgentInfoForNetwork(network); 1265 nc = getNetworkCapabilitiesInternal(nai); 1266 if (nc != null) { 1267 result.put(network, nc); 1268 } 1269 } 1270 } 1271 } 1272 } 1273 } 1274 1275 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1276 out = result.values().toArray(out); 1277 return out; 1278 } 1279 1280 @Override 1281 public boolean isNetworkSupported(int networkType) { 1282 enforceAccessPermission(); 1283 return mLegacyTypeTracker.isTypeSupported(networkType); 1284 } 1285 1286 /** 1287 * Return LinkProperties for the active (i.e., connected) default 1288 * network interface. It is assumed that at most one default network 1289 * is active at a time. If more than one is active, it is indeterminate 1290 * which will be returned. 1291 * @return the ip properties for the active network, or {@code null} if 1292 * none is active 1293 */ 1294 @Override 1295 public LinkProperties getActiveLinkProperties() { 1296 enforceAccessPermission(); 1297 final int uid = Binder.getCallingUid(); 1298 NetworkState state = getUnfilteredActiveNetworkState(uid); 1299 return state.linkProperties; 1300 } 1301 1302 @Override 1303 public LinkProperties getLinkPropertiesForType(int networkType) { 1304 enforceAccessPermission(); 1305 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1306 if (nai != null) { 1307 synchronized (nai) { 1308 return new LinkProperties(nai.linkProperties); 1309 } 1310 } 1311 return null; 1312 } 1313 1314 // TODO - this should be ALL networks 1315 @Override 1316 public LinkProperties getLinkProperties(Network network) { 1317 enforceAccessPermission(); 1318 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1319 if (nai != null) { 1320 synchronized (nai) { 1321 return new LinkProperties(nai.linkProperties); 1322 } 1323 } 1324 return null; 1325 } 1326 1327 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1328 if (nai != null) { 1329 synchronized (nai) { 1330 if (nai.networkCapabilities != null) { 1331 return new NetworkCapabilities(nai.networkCapabilities); 1332 } 1333 } 1334 } 1335 return null; 1336 } 1337 1338 @Override 1339 public NetworkCapabilities getNetworkCapabilities(Network network) { 1340 enforceAccessPermission(); 1341 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1342 } 1343 1344 @Override 1345 public NetworkState[] getAllNetworkState() { 1346 // Require internal since we're handing out IMSI details 1347 enforceConnectivityInternalPermission(); 1348 1349 final ArrayList<NetworkState> result = Lists.newArrayList(); 1350 for (Network network : getAllNetworks()) { 1351 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1352 if (nai != null) { 1353 result.add(nai.getNetworkState()); 1354 } 1355 } 1356 return result.toArray(new NetworkState[result.size()]); 1357 } 1358 1359 @Override 1360 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1361 enforceAccessPermission(); 1362 final int uid = Binder.getCallingUid(); 1363 final long token = Binder.clearCallingIdentity(); 1364 try { 1365 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1366 if (state.networkInfo != null) { 1367 try { 1368 return mPolicyManager.getNetworkQuotaInfo(state); 1369 } catch (RemoteException e) { 1370 } 1371 } 1372 return null; 1373 } finally { 1374 Binder.restoreCallingIdentity(token); 1375 } 1376 } 1377 1378 @Override 1379 public boolean isActiveNetworkMetered() { 1380 enforceAccessPermission(); 1381 1382 final NetworkInfo info = getActiveNetworkInfo(); 1383 return (info != null) ? info.isMetered() : false; 1384 } 1385 1386 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1387 @Override 1388 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1389 int deviceType = Integer.parseInt(label); 1390 sendDataActivityBroadcast(deviceType, active, tsNanos); 1391 } 1392 }; 1393 1394 /** 1395 * Ensure that a network route exists to deliver traffic to the specified 1396 * host via the specified network interface. 1397 * @param networkType the type of the network over which traffic to the 1398 * specified host is to be routed 1399 * @param hostAddress the IP address of the host to which the route is 1400 * desired 1401 * @return {@code true} on success, {@code false} on failure 1402 */ 1403 @Override 1404 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1405 enforceChangePermission(); 1406 if (mProtectedNetworks.contains(networkType)) { 1407 enforceConnectivityInternalPermission(); 1408 } 1409 1410 InetAddress addr; 1411 try { 1412 addr = InetAddress.getByAddress(hostAddress); 1413 } catch (UnknownHostException e) { 1414 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1415 return false; 1416 } 1417 1418 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1419 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1420 return false; 1421 } 1422 1423 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1424 if (nai == null) { 1425 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1426 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1427 } else { 1428 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1429 } 1430 return false; 1431 } 1432 1433 DetailedState netState; 1434 synchronized (nai) { 1435 netState = nai.networkInfo.getDetailedState(); 1436 } 1437 1438 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1439 if (VDBG) { 1440 log("requestRouteToHostAddress on down network " 1441 + "(" + networkType + ") - dropped" 1442 + " netState=" + netState); 1443 } 1444 return false; 1445 } 1446 1447 final int uid = Binder.getCallingUid(); 1448 final long token = Binder.clearCallingIdentity(); 1449 try { 1450 LinkProperties lp; 1451 int netId; 1452 synchronized (nai) { 1453 lp = nai.linkProperties; 1454 netId = nai.network.netId; 1455 } 1456 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1457 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1458 return ok; 1459 } finally { 1460 Binder.restoreCallingIdentity(token); 1461 } 1462 } 1463 1464 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1465 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1466 if (bestRoute == null) { 1467 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1468 } else { 1469 String iface = bestRoute.getInterface(); 1470 if (bestRoute.getGateway().equals(addr)) { 1471 // if there is no better route, add the implied hostroute for our gateway 1472 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1473 } else { 1474 // if we will connect to this through another route, add a direct route 1475 // to it's gateway 1476 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1477 } 1478 } 1479 if (DBG) log("Adding legacy route " + bestRoute + 1480 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1481 try { 1482 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1483 } catch (Exception e) { 1484 // never crash - catch them all 1485 if (DBG) loge("Exception trying to add a route: " + e); 1486 return false; 1487 } 1488 return true; 1489 } 1490 1491 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1492 @Override 1493 public void onUidRulesChanged(int uid, int uidRules) { 1494 // caller is NPMS, since we only register with them 1495 if (LOGD_RULES) { 1496 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1497 } 1498 1499 synchronized (mRulesLock) { 1500 // skip update when we've already applied rules 1501 final int oldRules = mUidRules.get(uid, RULE_NONE); 1502 if (oldRules == uidRules) return; 1503 1504 if (uidRules == RULE_NONE) { 1505 mUidRules.delete(uid); 1506 } else { 1507 mUidRules.put(uid, uidRules); 1508 } 1509 } 1510 1511 // TODO: notify UID when it has requested targeted updates 1512 } 1513 1514 @Override 1515 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1516 // caller is NPMS, since we only register with them 1517 if (LOGD_RULES) { 1518 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1519 } 1520 1521 synchronized (mRulesLock) { 1522 mMeteredIfaces.clear(); 1523 for (String iface : meteredIfaces) { 1524 mMeteredIfaces.add(iface); 1525 } 1526 } 1527 } 1528 1529 @Override 1530 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1531 // caller is NPMS, since we only register with them 1532 if (LOGD_RULES) { 1533 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1534 } 1535 1536 synchronized (mRulesLock) { 1537 mRestrictBackground = restrictBackground; 1538 } 1539 1540 if (restrictBackground) { 1541 log("onRestrictBackgroundChanged(true): disabling tethering"); 1542 mTethering.untetherAll(); 1543 } 1544 } 1545 1546 @Override 1547 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1548 if (LOGD_RULES) { 1549 // caller is NPMS, since we only register with them 1550 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1551 + whitelisted + ")"); 1552 } 1553 } 1554 @Override 1555 public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { 1556 if (LOGD_RULES) { 1557 // caller is NPMS, since we only register with them 1558 log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" 1559 + blacklisted + ")"); 1560 } 1561 } 1562 }; 1563 1564 /** 1565 * Require that the caller is either in the same user or has appropriate permission to interact 1566 * across users. 1567 * 1568 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1569 */ 1570 private void enforceCrossUserPermission(int userId) { 1571 if (userId == UserHandle.getCallingUserId()) { 1572 // Not a cross-user call. 1573 return; 1574 } 1575 mContext.enforceCallingOrSelfPermission( 1576 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1577 "ConnectivityService"); 1578 } 1579 1580 private void enforceInternetPermission() { 1581 mContext.enforceCallingOrSelfPermission( 1582 android.Manifest.permission.INTERNET, 1583 "ConnectivityService"); 1584 } 1585 1586 private void enforceAccessPermission() { 1587 mContext.enforceCallingOrSelfPermission( 1588 android.Manifest.permission.ACCESS_NETWORK_STATE, 1589 "ConnectivityService"); 1590 } 1591 1592 private void enforceChangePermission() { 1593 ConnectivityManager.enforceChangePermission(mContext); 1594 } 1595 1596 private void enforceTetherAccessPermission() { 1597 mContext.enforceCallingOrSelfPermission( 1598 android.Manifest.permission.ACCESS_NETWORK_STATE, 1599 "ConnectivityService"); 1600 } 1601 1602 private void enforceConnectivityInternalPermission() { 1603 mContext.enforceCallingOrSelfPermission( 1604 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1605 "ConnectivityService"); 1606 } 1607 1608 private void enforceConnectivityRestrictedNetworksPermission() { 1609 try { 1610 mContext.enforceCallingOrSelfPermission( 1611 android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, 1612 "ConnectivityService"); 1613 return; 1614 } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } 1615 enforceConnectivityInternalPermission(); 1616 } 1617 1618 private void enforceKeepalivePermission() { 1619 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1620 } 1621 1622 // Public because it's used by mLockdownTracker. 1623 public void sendConnectedBroadcast(NetworkInfo info) { 1624 enforceConnectivityInternalPermission(); 1625 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1626 } 1627 1628 private void sendInetConditionBroadcast(NetworkInfo info) { 1629 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1630 } 1631 1632 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1633 if (mLockdownTracker != null) { 1634 info = new NetworkInfo(info); 1635 mLockdownTracker.augmentNetworkInfo(info); 1636 } 1637 1638 Intent intent = new Intent(bcastType); 1639 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1640 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1641 if (info.isFailover()) { 1642 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1643 info.setFailover(false); 1644 } 1645 if (info.getReason() != null) { 1646 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1647 } 1648 if (info.getExtraInfo() != null) { 1649 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1650 info.getExtraInfo()); 1651 } 1652 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1653 return intent; 1654 } 1655 1656 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1657 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1658 } 1659 1660 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1661 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1662 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1663 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1664 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1665 final long ident = Binder.clearCallingIdentity(); 1666 try { 1667 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1668 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1669 } finally { 1670 Binder.restoreCallingIdentity(ident); 1671 } 1672 } 1673 1674 private void sendStickyBroadcast(Intent intent) { 1675 synchronized(this) { 1676 if (!mSystemReady) { 1677 mInitialBroadcast = new Intent(intent); 1678 } 1679 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1680 if (VDBG) { 1681 log("sendStickyBroadcast: action=" + intent.getAction()); 1682 } 1683 1684 Bundle options = null; 1685 final long ident = Binder.clearCallingIdentity(); 1686 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1687 final NetworkInfo ni = intent.getParcelableExtra( 1688 ConnectivityManager.EXTRA_NETWORK_INFO); 1689 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1690 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1691 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1692 } else { 1693 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1694 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1695 options = opts.toBundle(); 1696 } 1697 final IBatteryStats bs = BatteryStatsService.getService(); 1698 try { 1699 bs.noteConnectivityChanged(intent.getIntExtra( 1700 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1701 ni != null ? ni.getState().toString() : "?"); 1702 } catch (RemoteException e) { 1703 } 1704 } 1705 try { 1706 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1707 } finally { 1708 Binder.restoreCallingIdentity(ident); 1709 } 1710 } 1711 } 1712 1713 void systemReady() { 1714 loadGlobalProxy(); 1715 1716 synchronized(this) { 1717 mSystemReady = true; 1718 if (mInitialBroadcast != null) { 1719 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1720 mInitialBroadcast = null; 1721 } 1722 } 1723 // load the global proxy at startup 1724 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1725 1726 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1727 // for user to unlock device too. 1728 updateLockdownVpn(); 1729 1730 // Configure whether mobile data is always on. 1731 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1732 1733 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1734 1735 mPermissionMonitor.startMonitoring(); 1736 } 1737 1738 /** 1739 * Setup data activity tracking for the given network. 1740 * 1741 * Every {@code setupDataActivityTracking} should be paired with a 1742 * {@link #removeDataActivityTracking} for cleanup. 1743 */ 1744 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1745 final String iface = networkAgent.linkProperties.getInterfaceName(); 1746 1747 final int timeout; 1748 int type = ConnectivityManager.TYPE_NONE; 1749 1750 if (networkAgent.networkCapabilities.hasTransport( 1751 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1752 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1753 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1754 10); 1755 type = ConnectivityManager.TYPE_MOBILE; 1756 } else if (networkAgent.networkCapabilities.hasTransport( 1757 NetworkCapabilities.TRANSPORT_WIFI)) { 1758 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1759 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1760 15); 1761 type = ConnectivityManager.TYPE_WIFI; 1762 } else { 1763 // do not track any other networks 1764 timeout = 0; 1765 } 1766 1767 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1768 try { 1769 mNetd.addIdleTimer(iface, timeout, type); 1770 } catch (Exception e) { 1771 // You shall not crash! 1772 loge("Exception in setupDataActivityTracking " + e); 1773 } 1774 } 1775 } 1776 1777 /** 1778 * Remove data activity tracking when network disconnects. 1779 */ 1780 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1781 final String iface = networkAgent.linkProperties.getInterfaceName(); 1782 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1783 1784 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1785 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1786 try { 1787 // the call fails silently if no idletimer setup for this interface 1788 mNetd.removeIdleTimer(iface); 1789 } catch (Exception e) { 1790 loge("Exception in removeDataActivityTracking " + e); 1791 } 1792 } 1793 } 1794 1795 /** 1796 * Reads the network specific MTU size from reources. 1797 * and set it on it's iface. 1798 */ 1799 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1800 final String iface = newLp.getInterfaceName(); 1801 final int mtu = newLp.getMtu(); 1802 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1803 if (VDBG) log("identical MTU - not setting"); 1804 return; 1805 } 1806 1807 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1808 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1809 return; 1810 } 1811 1812 // Cannot set MTU without interface name 1813 if (TextUtils.isEmpty(iface)) { 1814 loge("Setting MTU size with null iface."); 1815 return; 1816 } 1817 1818 try { 1819 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1820 mNetd.setMtu(iface, mtu); 1821 } catch (Exception e) { 1822 Slog.e(TAG, "exception in setMtu()" + e); 1823 } 1824 } 1825 1826 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1827 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1828 1829 // Overridden for testing purposes to avoid writing to SystemProperties. 1830 @VisibleForTesting 1831 protected int getDefaultTcpRwnd() { 1832 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1833 } 1834 1835 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1836 if (isDefaultNetwork(nai) == false) { 1837 return; 1838 } 1839 1840 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1841 String[] values = null; 1842 if (tcpBufferSizes != null) { 1843 values = tcpBufferSizes.split(","); 1844 } 1845 1846 if (values == null || values.length != 6) { 1847 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1848 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1849 values = tcpBufferSizes.split(","); 1850 } 1851 1852 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1853 1854 try { 1855 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1856 1857 final String prefix = "/sys/kernel/ipv4/tcp_"; 1858 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1859 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1860 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1861 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1862 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1863 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1864 mCurrentTcpBufferSizes = tcpBufferSizes; 1865 } catch (IOException e) { 1866 loge("Can't set TCP buffer sizes:" + e); 1867 } 1868 1869 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1870 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1871 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1872 if (rwndValue != 0) { 1873 SystemProperties.set(sysctlKey, rwndValue.toString()); 1874 } 1875 } 1876 1877 private void flushVmDnsCache() { 1878 /* 1879 * Tell the VMs to toss their DNS caches 1880 */ 1881 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1882 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1883 /* 1884 * Connectivity events can happen before boot has completed ... 1885 */ 1886 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1887 final long ident = Binder.clearCallingIdentity(); 1888 try { 1889 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1890 } finally { 1891 Binder.restoreCallingIdentity(ident); 1892 } 1893 } 1894 1895 @Override 1896 public int getRestoreDefaultNetworkDelay(int networkType) { 1897 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1898 NETWORK_RESTORE_DELAY_PROP_NAME); 1899 if(restoreDefaultNetworkDelayStr != null && 1900 restoreDefaultNetworkDelayStr.length() != 0) { 1901 try { 1902 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1903 } catch (NumberFormatException e) { 1904 } 1905 } 1906 // if the system property isn't set, use the value for the apn type 1907 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1908 1909 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1910 (mNetConfigs[networkType] != null)) { 1911 ret = mNetConfigs[networkType].restoreTime; 1912 } 1913 return ret; 1914 } 1915 1916 private boolean argsContain(String[] args, String target) { 1917 for (String arg : args) { 1918 if (arg.equals(target)) return true; 1919 } 1920 return false; 1921 } 1922 1923 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1924 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1925 final long DIAG_TIME_MS = 5000; 1926 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1927 // Start gathering diagnostic information. 1928 netDiags.add(new NetworkDiagnostics( 1929 nai.network, 1930 new LinkProperties(nai.linkProperties), // Must be a copy. 1931 DIAG_TIME_MS)); 1932 } 1933 1934 for (NetworkDiagnostics netDiag : netDiags) { 1935 pw.println(); 1936 netDiag.waitForMeasurements(); 1937 netDiag.dump(pw); 1938 } 1939 } 1940 1941 @Override 1942 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1943 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1944 if (mContext.checkCallingOrSelfPermission( 1945 android.Manifest.permission.DUMP) 1946 != PackageManager.PERMISSION_GRANTED) { 1947 pw.println("Permission Denial: can't dump ConnectivityService " + 1948 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1949 Binder.getCallingUid()); 1950 return; 1951 } 1952 1953 if (argsContain(args, "--diag")) { 1954 dumpNetworkDiagnostics(pw); 1955 return; 1956 } 1957 1958 pw.print("NetworkFactories for:"); 1959 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1960 pw.print(" " + nfi.name); 1961 } 1962 pw.println(); 1963 pw.println(); 1964 1965 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1966 pw.print("Active default network: "); 1967 if (defaultNai == null) { 1968 pw.println("none"); 1969 } else { 1970 pw.println(defaultNai.network.netId); 1971 } 1972 pw.println(); 1973 1974 pw.println("Current Networks:"); 1975 pw.increaseIndent(); 1976 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1977 pw.println(nai.toString()); 1978 pw.increaseIndent(); 1979 pw.println(String.format( 1980 "Requests: REQUEST:%d LISTEN:%d BACKGROUND_REQUEST:%d total:%d", 1981 nai.numForegroundNetworkRequests(), 1982 nai.numNetworkRequests() - nai.numRequestNetworkRequests(), 1983 nai.numBackgroundNetworkRequests(), 1984 nai.numNetworkRequests())); 1985 pw.increaseIndent(); 1986 for (int i = 0; i < nai.numNetworkRequests(); i++) { 1987 pw.println(nai.requestAt(i).toString()); 1988 } 1989 pw.decreaseIndent(); 1990 pw.println("Lingered:"); 1991 pw.increaseIndent(); 1992 nai.dumpLingerTimers(pw); 1993 pw.decreaseIndent(); 1994 pw.decreaseIndent(); 1995 } 1996 pw.decreaseIndent(); 1997 pw.println(); 1998 1999 pw.println("Metered Interfaces:"); 2000 pw.increaseIndent(); 2001 for (String value : mMeteredIfaces) { 2002 pw.println(value); 2003 } 2004 pw.decreaseIndent(); 2005 pw.println(); 2006 2007 pw.print("Restrict background: "); 2008 pw.println(mRestrictBackground); 2009 pw.println(); 2010 2011 pw.println("Status for known UIDs:"); 2012 pw.increaseIndent(); 2013 final int size = mUidRules.size(); 2014 for (int i = 0; i < size; i++) { 2015 final int uid = mUidRules.keyAt(i); 2016 pw.print("UID="); 2017 pw.print(uid); 2018 final int uidRules = mUidRules.get(uid, RULE_NONE); 2019 pw.print(" rules="); 2020 pw.print(uidRulesToString(uidRules)); 2021 pw.println(); 2022 } 2023 pw.println(); 2024 pw.decreaseIndent(); 2025 2026 pw.println("Network Requests:"); 2027 pw.increaseIndent(); 2028 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2029 pw.println(nri.toString()); 2030 } 2031 pw.println(); 2032 pw.decreaseIndent(); 2033 2034 mLegacyTypeTracker.dump(pw); 2035 2036 synchronized (this) { 2037 pw.print("mNetTransitionWakeLock: currently " + 2038 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 2039 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 2040 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 2041 } else { 2042 pw.println(", last requested never"); 2043 } 2044 } 2045 2046 pw.println(); 2047 mTethering.dump(fd, pw, args); 2048 2049 pw.println(); 2050 mKeepaliveTracker.dump(pw); 2051 2052 pw.println(); 2053 2054 if (mInetLog != null && mInetLog.size() > 0) { 2055 pw.println(); 2056 pw.println("Inet condition reports:"); 2057 pw.increaseIndent(); 2058 for(int i = 0; i < mInetLog.size(); i++) { 2059 pw.println(mInetLog.get(i)); 2060 } 2061 pw.decreaseIndent(); 2062 } 2063 2064 if (argsContain(args, "--short") == false) { 2065 pw.println(); 2066 synchronized (mValidationLogs) { 2067 pw.println("mValidationLogs (most recent first):"); 2068 for (ValidationLog p : mValidationLogs) { 2069 pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); 2070 pw.increaseIndent(); 2071 p.mLog.dump(fd, pw, args); 2072 pw.decreaseIndent(); 2073 } 2074 } 2075 2076 pw.println(); 2077 pw.println("mNetworkRequestInfoLogs (most recent first):"); 2078 pw.increaseIndent(); 2079 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 2080 pw.decreaseIndent(); 2081 2082 pw.println(); 2083 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 2084 pw.increaseIndent(); 2085 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 2086 pw.decreaseIndent(); 2087 } 2088 } 2089 2090 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 2091 if (nai.network == null) return false; 2092 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 2093 if (officialNai != null && officialNai.equals(nai)) return true; 2094 if (officialNai != null || VDBG) { 2095 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 2096 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 2097 " - " + nai); 2098 } 2099 return false; 2100 } 2101 2102 // must be stateless - things change under us. 2103 private class NetworkStateTrackerHandler extends Handler { 2104 public NetworkStateTrackerHandler(Looper looper) { 2105 super(looper); 2106 } 2107 2108 private boolean maybeHandleAsyncChannelMessage(Message msg) { 2109 switch (msg.what) { 2110 default: 2111 return false; 2112 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2113 handleAsyncChannelHalfConnect(msg); 2114 break; 2115 } 2116 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2117 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2118 if (nai != null) nai.asyncChannel.disconnect(); 2119 break; 2120 } 2121 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2122 handleAsyncChannelDisconnected(msg); 2123 break; 2124 } 2125 } 2126 return true; 2127 } 2128 2129 private void maybeHandleNetworkAgentMessage(Message msg) { 2130 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2131 if (nai == null) { 2132 if (VDBG) { 2133 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 2134 log(String.format("%s from unknown NetworkAgent", what)); 2135 } 2136 return; 2137 } 2138 2139 switch (msg.what) { 2140 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2141 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2142 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2143 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED) || 2144 networkCapabilities.hasCapability(NET_CAPABILITY_FOREGROUND)) { 2145 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2146 } 2147 updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities); 2148 break; 2149 } 2150 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2151 if (VDBG) { 2152 log("Update of LinkProperties for " + nai.name() + 2153 "; created=" + nai.created + 2154 "; everConnected=" + nai.everConnected); 2155 } 2156 LinkProperties oldLp = nai.linkProperties; 2157 synchronized (nai) { 2158 nai.linkProperties = (LinkProperties)msg.obj; 2159 } 2160 if (nai.everConnected) updateLinkProperties(nai, oldLp); 2161 break; 2162 } 2163 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2164 NetworkInfo info = (NetworkInfo) msg.obj; 2165 updateNetworkInfo(nai, info); 2166 break; 2167 } 2168 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2169 Integer score = (Integer) msg.obj; 2170 if (score != null) updateNetworkScore(nai, score.intValue()); 2171 break; 2172 } 2173 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2174 try { 2175 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2176 } catch (Exception e) { 2177 // Never crash! 2178 loge("Exception in addVpnUidRanges: " + e); 2179 } 2180 break; 2181 } 2182 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2183 try { 2184 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2185 } catch (Exception e) { 2186 // Never crash! 2187 loge("Exception in removeVpnUidRanges: " + e); 2188 } 2189 break; 2190 } 2191 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2192 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2193 loge("ERROR: already-connected network explicitly selected."); 2194 } 2195 nai.networkMisc.explicitlySelected = true; 2196 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2197 break; 2198 } 2199 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2200 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2201 break; 2202 } 2203 } 2204 } 2205 2206 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2207 switch (msg.what) { 2208 default: 2209 return false; 2210 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2211 final NetworkAgentInfo nai; 2212 synchronized (mNetworkForNetId) { 2213 nai = mNetworkForNetId.get(msg.arg2); 2214 } 2215 if (nai != null) { 2216 final boolean valid = 2217 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2218 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2219 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2220 if (valid != nai.lastValidated) { 2221 final int oldScore = nai.getCurrentScore(); 2222 nai.lastValidated = valid; 2223 nai.everValidated |= valid; 2224 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2225 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2226 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2227 } 2228 updateInetCondition(nai); 2229 // Let the NetworkAgent know the state of its network 2230 Bundle redirectUrlBundle = new Bundle(); 2231 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2232 nai.asyncChannel.sendMessage( 2233 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2234 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2235 0, redirectUrlBundle); 2236 } 2237 break; 2238 } 2239 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2240 final int netId = msg.arg2; 2241 final boolean visible = (msg.arg1 != 0); 2242 final NetworkAgentInfo nai; 2243 synchronized (mNetworkForNetId) { 2244 nai = mNetworkForNetId.get(netId); 2245 } 2246 // If captive portal status has changed, update capabilities. 2247 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2248 final int oldScore = nai.getCurrentScore(); 2249 nai.lastCaptivePortalDetected = visible; 2250 nai.everCaptivePortalDetected |= visible; 2251 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2252 } 2253 if (!visible) { 2254 mNotifier.clearNotification(netId); 2255 } else { 2256 if (nai == null) { 2257 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2258 break; 2259 } 2260 if (!nai.networkMisc.provisioningNotificationDisabled) { 2261 mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null, 2262 (PendingIntent) msg.obj, nai.networkMisc.explicitlySelected); 2263 } 2264 } 2265 break; 2266 } 2267 } 2268 return true; 2269 } 2270 2271 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2272 switch (msg.what) { 2273 default: 2274 return false; 2275 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2276 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2277 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2278 handleLingerComplete(nai); 2279 } 2280 break; 2281 } 2282 } 2283 return true; 2284 } 2285 2286 @Override 2287 public void handleMessage(Message msg) { 2288 if (!maybeHandleAsyncChannelMessage(msg) && 2289 !maybeHandleNetworkMonitorMessage(msg) && 2290 !maybeHandleNetworkAgentInfoMessage(msg)) { 2291 maybeHandleNetworkAgentMessage(msg); 2292 } 2293 } 2294 } 2295 2296 private void updateLingerState(NetworkAgentInfo nai, long now) { 2297 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2298 // 2. If the network was lingering and there are now requests, unlinger it. 2299 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2300 // one lingered request, start lingering. 2301 nai.updateLingerTimer(); 2302 if (nai.isLingering() && nai.numForegroundNetworkRequests() > 0) { 2303 if (DBG) log("Unlingering " + nai.name()); 2304 nai.unlinger(); 2305 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2306 } else if (unneeded(nai, UnneededFor.LINGER) && nai.getLingerExpiry() > 0) { 2307 int lingerTime = (int) (nai.getLingerExpiry() - now); 2308 if (DBG) log("Lingering " + nai.name() + " for " + lingerTime + "ms"); 2309 nai.linger(); 2310 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2311 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2312 } 2313 } 2314 2315 private void handleAsyncChannelHalfConnect(Message msg) { 2316 AsyncChannel ac = (AsyncChannel) msg.obj; 2317 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2318 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2319 if (VDBG) log("NetworkFactory connected"); 2320 // A network factory has connected. Send it all current NetworkRequests. 2321 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2322 if (nri.request.isListen()) continue; 2323 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2324 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2325 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2326 } 2327 } else { 2328 loge("Error connecting NetworkFactory"); 2329 mNetworkFactoryInfos.remove(msg.obj); 2330 } 2331 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2332 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2333 if (VDBG) log("NetworkAgent connected"); 2334 // A network agent has requested a connection. Establish the connection. 2335 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2336 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2337 } else { 2338 loge("Error connecting NetworkAgent"); 2339 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2340 if (nai != null) { 2341 final boolean wasDefault = isDefaultNetwork(nai); 2342 synchronized (mNetworkForNetId) { 2343 mNetworkForNetId.remove(nai.network.netId); 2344 mNetIdInUse.delete(nai.network.netId); 2345 } 2346 // Just in case. 2347 mLegacyTypeTracker.remove(nai, wasDefault); 2348 } 2349 } 2350 } 2351 } 2352 2353 private void handleAsyncChannelDisconnected(Message msg) { 2354 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2355 if (nai != null) { 2356 if (DBG) { 2357 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2358 } 2359 // A network agent has disconnected. 2360 // TODO - if we move the logic to the network agent (have them disconnect 2361 // because they lost all their requests or because their score isn't good) 2362 // then they would disconnect organically, report their new state and then 2363 // disconnect the channel. 2364 if (nai.networkInfo.isConnected()) { 2365 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2366 null, null); 2367 } 2368 final boolean wasDefault = isDefaultNetwork(nai); 2369 if (wasDefault) { 2370 mDefaultInetConditionPublished = 0; 2371 // Log default network disconnection before required book-keeping. 2372 // Let rematchAllNetworksAndRequests() below record a new default network event 2373 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2374 // whose timestamps tell how long it takes to recover a default network. 2375 logDefaultNetworkEvent(null, nai); 2376 } 2377 notifyIfacesChangedForNetworkStats(); 2378 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2379 // by other networks that are already connected. Perhaps that can be done by 2380 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2381 // of rematchAllNetworksAndRequests 2382 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2383 mKeepaliveTracker.handleStopAllKeepalives(nai, 2384 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2385 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2386 mNetworkAgentInfos.remove(msg.replyTo); 2387 updateClat(null, nai.linkProperties, nai); 2388 synchronized (mNetworkForNetId) { 2389 // Remove the NetworkAgent, but don't mark the netId as 2390 // available until we've told netd to delete it below. 2391 mNetworkForNetId.remove(nai.network.netId); 2392 } 2393 // Remove all previously satisfied requests. 2394 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2395 NetworkRequest request = nai.requestAt(i); 2396 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2397 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2398 mNetworkForRequestId.remove(request.requestId); 2399 sendUpdatedScoreToFactories(request, 0); 2400 } 2401 } 2402 nai.clearLingerState(); 2403 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2404 removeDataActivityTracking(nai); 2405 notifyLockdownVpn(nai); 2406 requestNetworkTransitionWakelock(nai.name()); 2407 } 2408 mLegacyTypeTracker.remove(nai, wasDefault); 2409 rematchAllNetworksAndRequests(null, 0); 2410 mLingerMonitor.noteDisconnect(nai); 2411 if (nai.created) { 2412 // Tell netd to clean up the configuration for this network 2413 // (routing rules, DNS, etc). 2414 // This may be slow as it requires a lot of netd shelling out to ip and 2415 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2416 // after we've rematched networks with requests which should make a potential 2417 // fallback network the default or requested a new network from the 2418 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2419 // long time. 2420 try { 2421 mNetd.removeNetwork(nai.network.netId); 2422 } catch (Exception e) { 2423 loge("Exception removing network: " + e); 2424 } 2425 } 2426 synchronized (mNetworkForNetId) { 2427 mNetIdInUse.delete(nai.network.netId); 2428 } 2429 } else { 2430 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2431 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2432 } 2433 } 2434 2435 // If this method proves to be too slow then we can maintain a separate 2436 // pendingIntent => NetworkRequestInfo map. 2437 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2438 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2439 Intent intent = pendingIntent.getIntent(); 2440 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2441 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2442 if (existingPendingIntent != null && 2443 existingPendingIntent.getIntent().filterEquals(intent)) { 2444 return entry.getValue(); 2445 } 2446 } 2447 return null; 2448 } 2449 2450 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2451 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2452 2453 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2454 if (existingRequest != null) { // remove the existing request. 2455 if (DBG) log("Replacing " + existingRequest.request + " with " 2456 + nri.request + " because their intents matched."); 2457 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2458 } 2459 handleRegisterNetworkRequest(nri); 2460 } 2461 2462 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2463 mNetworkRequests.put(nri.request, nri); 2464 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2465 if (nri.request.isListen()) { 2466 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2467 if (nri.request.networkCapabilities.hasSignalStrength() && 2468 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2469 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2470 } 2471 } 2472 } 2473 rematchAllNetworksAndRequests(null, 0); 2474 if (nri.request.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2475 sendUpdatedScoreToFactories(nri.request, 0); 2476 } 2477 } 2478 2479 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2480 int callingUid) { 2481 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2482 if (nri != null) { 2483 handleReleaseNetworkRequest(nri.request, callingUid); 2484 } 2485 } 2486 2487 // Determines whether the network is the best (or could become the best, if it validated), for 2488 // none of a particular type of NetworkRequests. The type of NetworkRequests considered depends 2489 // on the value of reason: 2490 // 2491 // - UnneededFor.TEARDOWN: non-listen NetworkRequests. If a network is unneeded for this reason, 2492 // then it should be torn down. 2493 // - UnneededFor.LINGER: foreground NetworkRequests. If a network is unneeded for this reason, 2494 // then it should be lingered. 2495 private boolean unneeded(NetworkAgentInfo nai, UnneededFor reason) { 2496 final int numRequests; 2497 switch (reason) { 2498 case TEARDOWN: 2499 numRequests = nai.numRequestNetworkRequests(); 2500 break; 2501 case LINGER: 2502 numRequests = nai.numForegroundNetworkRequests(); 2503 break; 2504 default: 2505 Slog.wtf(TAG, "Invalid reason. Cannot happen."); 2506 return true; 2507 } 2508 2509 if (!nai.everConnected || nai.isVPN() || nai.isLingering() || numRequests > 0) { 2510 return false; 2511 } 2512 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2513 if (reason == UnneededFor.LINGER && nri.request.isBackgroundRequest()) { 2514 // Background requests don't affect lingering. 2515 continue; 2516 } 2517 2518 // If this Network is already the highest scoring Network for a request, or if 2519 // there is hope for it to become one if it validated, then it is needed. 2520 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2521 (nai.isSatisfyingRequest(nri.request.requestId) || 2522 // Note that this catches two important cases: 2523 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2524 // is currently satisfying the request. This is desirable when 2525 // cellular ends up validating but WiFi does not. 2526 // 2. Unvalidated WiFi will not be reaped when validated cellular 2527 // is currently satisfying the request. This is desirable when 2528 // WiFi ends up validating and out scoring cellular. 2529 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2530 nai.getCurrentScoreAsValidated())) { 2531 return false; 2532 } 2533 } 2534 return true; 2535 } 2536 2537 private NetworkRequestInfo getNriForAppRequest( 2538 NetworkRequest request, int callingUid, String requestedOperation) { 2539 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2540 2541 if (nri != null) { 2542 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2543 log(String.format("UID %d attempted to %s for unowned request %s", 2544 callingUid, requestedOperation, nri)); 2545 return null; 2546 } 2547 } 2548 2549 return nri; 2550 } 2551 2552 private void handleRequestCallbackUpdate(NetworkRequest request, int callingUid, 2553 String description, int callbackType) { 2554 final NetworkRequestInfo nri = getNriForAppRequest(request, callingUid, description); 2555 if (nri == null) return; 2556 2557 final NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2558 // The network that is satisfying this request may have changed since 2559 // the application requested the update. 2560 // 2561 // - If the request is no longer satisfied, don't send any updates. 2562 // - If the request is satisfied by a different network, it is the 2563 // caller's responsibility to check that the Network object in the 2564 // callback matches the network that was returned in the last 2565 // onAvailable() callback for this request. 2566 if (nai == null) return; 2567 callCallbackForRequest(nri, nai, callbackType, 0); 2568 } 2569 2570 private void handleRequestLinkProperties(NetworkRequest request, int callingUid) { 2571 handleRequestCallbackUpdate(request, callingUid, 2572 "request LinkProperties", ConnectivityManager.CALLBACK_IP_CHANGED); 2573 } 2574 2575 private void handleRequestNetworkCapabilities(NetworkRequest request, int callingUid) { 2576 handleRequestCallbackUpdate(request, callingUid, 2577 "request NetworkCapabilities", ConnectivityManager.CALLBACK_CAP_CHANGED); 2578 } 2579 2580 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2581 final NetworkRequestInfo nri = getNriForAppRequest( 2582 request, callingUid, "release NetworkRequest"); 2583 if (nri == null) return; 2584 2585 if (VDBG || (DBG && nri.request.isRequest())) log("releasing " + request); 2586 nri.unlinkDeathRecipient(); 2587 mNetworkRequests.remove(request); 2588 synchronized (mUidToNetworkRequestCount) { 2589 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2590 if (requests < 1) { 2591 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2592 nri.mUid); 2593 } else if (requests == 1) { 2594 mUidToNetworkRequestCount.removeAt( 2595 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2596 } else { 2597 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2598 } 2599 } 2600 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2601 if (nri.request.isRequest()) { 2602 boolean wasKept = false; 2603 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2604 if (nai != null) { 2605 boolean wasBackgroundNetwork = nai.isBackgroundNetwork(); 2606 nai.removeRequest(nri.request.requestId); 2607 if (VDBG) { 2608 log(" Removing from current network " + nai.name() + 2609 ", leaving " + nai.numNetworkRequests() + " requests."); 2610 } 2611 // If there are still lingered requests on this network, don't tear it down, 2612 // but resume lingering instead. 2613 updateLingerState(nai, SystemClock.elapsedRealtime()); 2614 if (unneeded(nai, UnneededFor.TEARDOWN)) { 2615 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2616 teardownUnneededNetwork(nai); 2617 } else { 2618 wasKept = true; 2619 } 2620 mNetworkForRequestId.remove(nri.request.requestId); 2621 if (!wasBackgroundNetwork && nai.isBackgroundNetwork()) { 2622 // Went from foreground to background. 2623 updateCapabilities(nai.getCurrentScore(), nai, nai.networkCapabilities); 2624 } 2625 } 2626 2627 // TODO: remove this code once we know that the Slog.wtf is never hit. 2628 // 2629 // Find all networks that are satisfying this request and remove the request 2630 // from their request lists. 2631 // TODO - it's my understanding that for a request there is only a single 2632 // network satisfying it, so this loop is wasteful 2633 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2634 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2635 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2636 otherNai.name() + ", but mNetworkAgentInfos says " + 2637 (nai != null ? nai.name() : "null")); 2638 } 2639 } 2640 2641 // Maintain the illusion. When this request arrived, we might have pretended 2642 // that a network connected to serve it, even though the network was already 2643 // connected. Now that this request has gone away, we might have to pretend 2644 // that the network disconnected. LegacyTypeTracker will generate that 2645 // phantom disconnect for this type. 2646 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2647 boolean doRemove = true; 2648 if (wasKept) { 2649 // check if any of the remaining requests for this network are for the 2650 // same legacy type - if so, don't remove the nai 2651 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2652 NetworkRequest otherRequest = nai.requestAt(i); 2653 if (otherRequest.legacyType == nri.request.legacyType && 2654 otherRequest.isRequest()) { 2655 if (DBG) log(" still have other legacy request - leaving"); 2656 doRemove = false; 2657 } 2658 } 2659 } 2660 2661 if (doRemove) { 2662 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2663 } 2664 } 2665 2666 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2667 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2668 nri.request); 2669 } 2670 } else { 2671 // listens don't have a singular affectedNetwork. Check all networks to see 2672 // if this listen request applies and remove it. 2673 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2674 nai.removeRequest(nri.request.requestId); 2675 if (nri.request.networkCapabilities.hasSignalStrength() && 2676 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2677 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2678 } 2679 } 2680 } 2681 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED, 0); 2682 } 2683 2684 @Override 2685 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2686 enforceConnectivityInternalPermission(); 2687 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2688 accept ? 1 : 0, always ? 1: 0, network)); 2689 } 2690 2691 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2692 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2693 " accept=" + accept + " always=" + always); 2694 2695 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2696 if (nai == null) { 2697 // Nothing to do. 2698 return; 2699 } 2700 2701 if (nai.everValidated) { 2702 // The network validated while the dialog box was up. Take no action. 2703 return; 2704 } 2705 2706 if (!nai.networkMisc.explicitlySelected) { 2707 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2708 } 2709 2710 if (accept != nai.networkMisc.acceptUnvalidated) { 2711 int oldScore = nai.getCurrentScore(); 2712 nai.networkMisc.acceptUnvalidated = accept; 2713 rematchAllNetworksAndRequests(nai, oldScore); 2714 sendUpdatedScoreToFactories(nai); 2715 } 2716 2717 if (always) { 2718 nai.asyncChannel.sendMessage( 2719 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2720 } 2721 2722 if (!accept) { 2723 // Tell the NetworkAgent to not automatically reconnect to the network. 2724 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2725 // Teardown the nework. 2726 teardownUnneededNetwork(nai); 2727 } 2728 2729 } 2730 2731 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2732 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2733 mHandler.sendMessageDelayed( 2734 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2735 PROMPT_UNVALIDATED_DELAY_MS); 2736 } 2737 2738 private void handlePromptUnvalidated(Network network) { 2739 if (VDBG) log("handlePromptUnvalidated " + network); 2740 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2741 2742 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2743 // we haven't already been told to switch to it regardless of whether it validated or not. 2744 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2745 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2746 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2747 return; 2748 } 2749 2750 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2751 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2752 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2753 intent.setClassName("com.android.settings", 2754 "com.android.settings.wifi.WifiNoInternetDialog"); 2755 2756 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2757 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2758 2759 mNotifier.showNotification(nai.network.netId, NotificationType.NO_INTERNET, nai, null, 2760 pendingIntent, true); 2761 } 2762 2763 private class InternalHandler extends Handler { 2764 public InternalHandler(Looper looper) { 2765 super(looper); 2766 } 2767 2768 @Override 2769 public void handleMessage(Message msg) { 2770 switch (msg.what) { 2771 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2772 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2773 String causedBy = null; 2774 synchronized (ConnectivityService.this) { 2775 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2776 mNetTransitionWakeLock.isHeld()) { 2777 mNetTransitionWakeLock.release(); 2778 causedBy = mNetTransitionWakeLockCausedBy; 2779 } else { 2780 break; 2781 } 2782 } 2783 if (VDBG) { 2784 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2785 log("Failed to find a new network - expiring NetTransition Wakelock"); 2786 } else { 2787 log("NetTransition Wakelock (" + 2788 (causedBy == null ? "unknown" : causedBy) + 2789 " cleared because we found a replacement network"); 2790 } 2791 } 2792 break; 2793 } 2794 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2795 handleDeprecatedGlobalHttpProxy(); 2796 break; 2797 } 2798 case EVENT_PROXY_HAS_CHANGED: { 2799 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2800 break; 2801 } 2802 case EVENT_REGISTER_NETWORK_FACTORY: { 2803 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2804 break; 2805 } 2806 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2807 handleUnregisterNetworkFactory((Messenger)msg.obj); 2808 break; 2809 } 2810 case EVENT_REGISTER_NETWORK_AGENT: { 2811 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2812 break; 2813 } 2814 case EVENT_REGISTER_NETWORK_REQUEST: 2815 case EVENT_REGISTER_NETWORK_LISTENER: { 2816 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2817 break; 2818 } 2819 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2820 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2821 handleRegisterNetworkRequestWithIntent(msg); 2822 break; 2823 } 2824 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2825 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2826 break; 2827 } 2828 case EVENT_RELEASE_NETWORK_REQUEST: { 2829 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2830 break; 2831 } 2832 case EVENT_SET_ACCEPT_UNVALIDATED: { 2833 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2834 break; 2835 } 2836 case EVENT_PROMPT_UNVALIDATED: { 2837 handlePromptUnvalidated((Network) msg.obj); 2838 break; 2839 } 2840 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2841 handleMobileDataAlwaysOn(); 2842 break; 2843 } 2844 case EVENT_REQUEST_LINKPROPERTIES: 2845 handleRequestLinkProperties((NetworkRequest) msg.obj, msg.arg1); 2846 break; 2847 case EVENT_REQUEST_NETCAPABILITIES: 2848 handleRequestNetworkCapabilities((NetworkRequest) msg.obj, msg.arg1); 2849 break; 2850 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2851 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2852 mKeepaliveTracker.handleStartKeepalive(msg); 2853 break; 2854 } 2855 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2856 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2857 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2858 int slot = msg.arg1; 2859 int reason = msg.arg2; 2860 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2861 break; 2862 } 2863 case EVENT_SYSTEM_READY: { 2864 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2865 nai.networkMonitor.systemReady = true; 2866 } 2867 break; 2868 } 2869 } 2870 } 2871 } 2872 2873 // javadoc from interface 2874 @Override 2875 public int tether(String iface) { 2876 ConnectivityManager.enforceTetherChangePermission(mContext); 2877 if (isTetheringSupported()) { 2878 final int status = mTethering.tether(iface); 2879 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2880 try { 2881 mPolicyManager.onTetheringChanged(iface, true); 2882 } catch (RemoteException e) { 2883 } 2884 } 2885 return status; 2886 } else { 2887 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2888 } 2889 } 2890 2891 // javadoc from interface 2892 @Override 2893 public int untether(String iface) { 2894 ConnectivityManager.enforceTetherChangePermission(mContext); 2895 2896 if (isTetheringSupported()) { 2897 final int status = mTethering.untether(iface); 2898 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2899 try { 2900 mPolicyManager.onTetheringChanged(iface, false); 2901 } catch (RemoteException e) { 2902 } 2903 } 2904 return status; 2905 } else { 2906 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2907 } 2908 } 2909 2910 // javadoc from interface 2911 @Override 2912 public int getLastTetherError(String iface) { 2913 enforceTetherAccessPermission(); 2914 2915 if (isTetheringSupported()) { 2916 return mTethering.getLastTetherError(iface); 2917 } else { 2918 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2919 } 2920 } 2921 2922 // TODO - proper iface API for selection by property, inspection, etc 2923 @Override 2924 public String[] getTetherableUsbRegexs() { 2925 enforceTetherAccessPermission(); 2926 if (isTetheringSupported()) { 2927 return mTethering.getTetherableUsbRegexs(); 2928 } else { 2929 return new String[0]; 2930 } 2931 } 2932 2933 @Override 2934 public String[] getTetherableWifiRegexs() { 2935 enforceTetherAccessPermission(); 2936 if (isTetheringSupported()) { 2937 return mTethering.getTetherableWifiRegexs(); 2938 } else { 2939 return new String[0]; 2940 } 2941 } 2942 2943 @Override 2944 public String[] getTetherableBluetoothRegexs() { 2945 enforceTetherAccessPermission(); 2946 if (isTetheringSupported()) { 2947 return mTethering.getTetherableBluetoothRegexs(); 2948 } else { 2949 return new String[0]; 2950 } 2951 } 2952 2953 @Override 2954 public int setUsbTethering(boolean enable) { 2955 ConnectivityManager.enforceTetherChangePermission(mContext); 2956 if (isTetheringSupported()) { 2957 return mTethering.setUsbTethering(enable); 2958 } else { 2959 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2960 } 2961 } 2962 2963 // TODO - move iface listing, queries, etc to new module 2964 // javadoc from interface 2965 @Override 2966 public String[] getTetherableIfaces() { 2967 enforceTetherAccessPermission(); 2968 return mTethering.getTetherableIfaces(); 2969 } 2970 2971 @Override 2972 public String[] getTetheredIfaces() { 2973 enforceTetherAccessPermission(); 2974 return mTethering.getTetheredIfaces(); 2975 } 2976 2977 @Override 2978 public String[] getTetheringErroredIfaces() { 2979 enforceTetherAccessPermission(); 2980 return mTethering.getErroredIfaces(); 2981 } 2982 2983 @Override 2984 public String[] getTetheredDhcpRanges() { 2985 enforceConnectivityInternalPermission(); 2986 return mTethering.getTetheredDhcpRanges(); 2987 } 2988 2989 // if ro.tether.denied = true we default to no tethering 2990 // gservices could set the secure setting to 1 though to enable it on a build where it 2991 // had previously been turned off. 2992 @Override 2993 public boolean isTetheringSupported() { 2994 enforceTetherAccessPermission(); 2995 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2996 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2997 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2998 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2999 return tetherEnabledInSettings && mUserManager.isAdminUser() && 3000 ((mTethering.getTetherableUsbRegexs().length != 0 || 3001 mTethering.getTetherableWifiRegexs().length != 0 || 3002 mTethering.getTetherableBluetoothRegexs().length != 0) && 3003 mTethering.getUpstreamIfaceTypes().length != 0); 3004 } 3005 3006 @Override 3007 public void startTethering(int type, ResultReceiver receiver, 3008 boolean showProvisioningUi) { 3009 ConnectivityManager.enforceTetherChangePermission(mContext); 3010 if (!isTetheringSupported()) { 3011 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 3012 return; 3013 } 3014 mTethering.startTethering(type, receiver, showProvisioningUi); 3015 } 3016 3017 @Override 3018 public void stopTethering(int type) { 3019 ConnectivityManager.enforceTetherChangePermission(mContext); 3020 mTethering.stopTethering(type); 3021 } 3022 3023 // Called when we lose the default network and have no replacement yet. 3024 // This will automatically be cleared after X seconds or a new default network 3025 // becomes CONNECTED, whichever happens first. The timer is started by the 3026 // first caller and not restarted by subsequent callers. 3027 private void requestNetworkTransitionWakelock(String forWhom) { 3028 int serialNum = 0; 3029 synchronized (this) { 3030 if (mNetTransitionWakeLock.isHeld()) return; 3031 serialNum = ++mNetTransitionWakeLockSerialNumber; 3032 mNetTransitionWakeLock.acquire(); 3033 mNetTransitionWakeLockCausedBy = forWhom; 3034 } 3035 mHandler.sendMessageDelayed(mHandler.obtainMessage( 3036 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 3037 mNetTransitionWakeLockTimeout); 3038 return; 3039 } 3040 3041 // 100 percent is full good, 0 is full bad. 3042 @Override 3043 public void reportInetCondition(int networkType, int percentage) { 3044 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 3045 if (nai == null) return; 3046 reportNetworkConnectivity(nai.network, percentage > 50); 3047 } 3048 3049 @Override 3050 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 3051 enforceAccessPermission(); 3052 enforceInternetPermission(); 3053 3054 NetworkAgentInfo nai; 3055 if (network == null) { 3056 nai = getDefaultNetwork(); 3057 } else { 3058 nai = getNetworkAgentInfoForNetwork(network); 3059 } 3060 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 3061 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 3062 return; 3063 } 3064 // Revalidate if the app report does not match our current validated state. 3065 if (hasConnectivity == nai.lastValidated) return; 3066 final int uid = Binder.getCallingUid(); 3067 if (DBG) { 3068 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 3069 ") by " + uid); 3070 } 3071 synchronized (nai) { 3072 // Validating a network that has not yet connected could result in a call to 3073 // rematchNetworkAndRequests() which is not meant to work on such networks. 3074 if (!nai.everConnected) return; 3075 3076 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 3077 3078 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 3079 } 3080 } 3081 3082 private ProxyInfo getDefaultProxy() { 3083 // this information is already available as a world read/writable jvm property 3084 // so this API change wouldn't have a benifit. It also breaks the passing 3085 // of proxy info to all the JVMs. 3086 // enforceAccessPermission(); 3087 synchronized (mProxyLock) { 3088 ProxyInfo ret = mGlobalProxy; 3089 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3090 return ret; 3091 } 3092 } 3093 3094 @Override 3095 public ProxyInfo getProxyForNetwork(Network network) { 3096 if (network == null) return getDefaultProxy(); 3097 final ProxyInfo globalProxy = getGlobalProxy(); 3098 if (globalProxy != null) return globalProxy; 3099 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3100 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3101 // caller may not have. 3102 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3103 if (nai == null) return null; 3104 synchronized (nai) { 3105 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3106 if (proxyInfo == null) return null; 3107 return new ProxyInfo(proxyInfo); 3108 } 3109 } 3110 3111 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3112 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3113 // proxy is null then there is no proxy in place). 3114 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3115 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3116 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3117 proxy = null; 3118 } 3119 return proxy; 3120 } 3121 3122 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3123 // better for determining if a new proxy broadcast is necessary: 3124 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3125 // avoid unnecessary broadcasts. 3126 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3127 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3128 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3129 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3130 // all set. 3131 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3132 a = canonicalizeProxyInfo(a); 3133 b = canonicalizeProxyInfo(b); 3134 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3135 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3136 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3137 } 3138 3139 public void setGlobalProxy(ProxyInfo proxyProperties) { 3140 enforceConnectivityInternalPermission(); 3141 3142 synchronized (mProxyLock) { 3143 if (proxyProperties == mGlobalProxy) return; 3144 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3145 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3146 3147 String host = ""; 3148 int port = 0; 3149 String exclList = ""; 3150 String pacFileUrl = ""; 3151 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3152 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3153 if (!proxyProperties.isValid()) { 3154 if (DBG) 3155 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3156 return; 3157 } 3158 mGlobalProxy = new ProxyInfo(proxyProperties); 3159 host = mGlobalProxy.getHost(); 3160 port = mGlobalProxy.getPort(); 3161 exclList = mGlobalProxy.getExclusionListAsString(); 3162 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3163 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3164 } 3165 } else { 3166 mGlobalProxy = null; 3167 } 3168 ContentResolver res = mContext.getContentResolver(); 3169 final long token = Binder.clearCallingIdentity(); 3170 try { 3171 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3172 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3173 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3174 exclList); 3175 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3176 } finally { 3177 Binder.restoreCallingIdentity(token); 3178 } 3179 3180 if (mGlobalProxy == null) { 3181 proxyProperties = mDefaultProxy; 3182 } 3183 sendProxyBroadcast(proxyProperties); 3184 } 3185 } 3186 3187 private void loadGlobalProxy() { 3188 ContentResolver res = mContext.getContentResolver(); 3189 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3190 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3191 String exclList = Settings.Global.getString(res, 3192 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3193 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3194 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3195 ProxyInfo proxyProperties; 3196 if (!TextUtils.isEmpty(pacFileUrl)) { 3197 proxyProperties = new ProxyInfo(pacFileUrl); 3198 } else { 3199 proxyProperties = new ProxyInfo(host, port, exclList); 3200 } 3201 if (!proxyProperties.isValid()) { 3202 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3203 return; 3204 } 3205 3206 synchronized (mProxyLock) { 3207 mGlobalProxy = proxyProperties; 3208 } 3209 } 3210 } 3211 3212 public ProxyInfo getGlobalProxy() { 3213 // this information is already available as a world read/writable jvm property 3214 // so this API change wouldn't have a benifit. It also breaks the passing 3215 // of proxy info to all the JVMs. 3216 // enforceAccessPermission(); 3217 synchronized (mProxyLock) { 3218 return mGlobalProxy; 3219 } 3220 } 3221 3222 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3223 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3224 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3225 proxy = null; 3226 } 3227 synchronized (mProxyLock) { 3228 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3229 if (mDefaultProxy == proxy) return; // catches repeated nulls 3230 if (proxy != null && !proxy.isValid()) { 3231 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3232 return; 3233 } 3234 3235 // This call could be coming from the PacManager, containing the port of the local 3236 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3237 // global (to get the correct local port), and send a broadcast. 3238 // TODO: Switch PacManager to have its own message to send back rather than 3239 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3240 if ((mGlobalProxy != null) && (proxy != null) 3241 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3242 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3243 mGlobalProxy = proxy; 3244 sendProxyBroadcast(mGlobalProxy); 3245 return; 3246 } 3247 mDefaultProxy = proxy; 3248 3249 if (mGlobalProxy != null) return; 3250 if (!mDefaultProxyDisabled) { 3251 sendProxyBroadcast(proxy); 3252 } 3253 } 3254 } 3255 3256 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3257 // This method gets called when any network changes proxy, but the broadcast only ever contains 3258 // the default proxy (even if it hasn't changed). 3259 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3260 // world where an app might be bound to a non-default network. 3261 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3262 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3263 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3264 3265 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3266 sendProxyBroadcast(getDefaultProxy()); 3267 } 3268 } 3269 3270 private void handleDeprecatedGlobalHttpProxy() { 3271 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3272 Settings.Global.HTTP_PROXY); 3273 if (!TextUtils.isEmpty(proxy)) { 3274 String data[] = proxy.split(":"); 3275 if (data.length == 0) { 3276 return; 3277 } 3278 3279 String proxyHost = data[0]; 3280 int proxyPort = 8080; 3281 if (data.length > 1) { 3282 try { 3283 proxyPort = Integer.parseInt(data[1]); 3284 } catch (NumberFormatException e) { 3285 return; 3286 } 3287 } 3288 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3289 setGlobalProxy(p); 3290 } 3291 } 3292 3293 private void sendProxyBroadcast(ProxyInfo proxy) { 3294 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3295 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3296 if (DBG) log("sending Proxy Broadcast for " + proxy); 3297 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3298 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3299 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3300 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3301 final long ident = Binder.clearCallingIdentity(); 3302 try { 3303 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3304 } finally { 3305 Binder.restoreCallingIdentity(ident); 3306 } 3307 } 3308 3309 private static class SettingsObserver extends ContentObserver { 3310 final private HashMap<Uri, Integer> mUriEventMap; 3311 final private Context mContext; 3312 final private Handler mHandler; 3313 3314 SettingsObserver(Context context, Handler handler) { 3315 super(null); 3316 mUriEventMap = new HashMap<Uri, Integer>(); 3317 mContext = context; 3318 mHandler = handler; 3319 } 3320 3321 void observe(Uri uri, int what) { 3322 mUriEventMap.put(uri, what); 3323 final ContentResolver resolver = mContext.getContentResolver(); 3324 resolver.registerContentObserver(uri, false, this); 3325 } 3326 3327 @Override 3328 public void onChange(boolean selfChange) { 3329 Slog.wtf(TAG, "Should never be reached."); 3330 } 3331 3332 @Override 3333 public void onChange(boolean selfChange, Uri uri) { 3334 final Integer what = mUriEventMap.get(uri); 3335 if (what != null) { 3336 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3337 } else { 3338 loge("No matching event to send for URI=" + uri); 3339 } 3340 } 3341 } 3342 3343 private static void log(String s) { 3344 Slog.d(TAG, s); 3345 } 3346 3347 private static void loge(String s) { 3348 Slog.e(TAG, s); 3349 } 3350 3351 private static <T> T checkNotNull(T value, String message) { 3352 if (value == null) { 3353 throw new NullPointerException(message); 3354 } 3355 return value; 3356 } 3357 3358 /** 3359 * Prepare for a VPN application. 3360 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3361 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3362 * 3363 * @param oldPackage Package name of the application which currently controls VPN, which will 3364 * be replaced. If there is no such application, this should should either be 3365 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3366 * @param newPackage Package name of the application which should gain control of VPN, or 3367 * {@code null} to disable. 3368 * @param userId User for whom to prepare the new VPN. 3369 * 3370 * @hide 3371 */ 3372 @Override 3373 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3374 int userId) { 3375 enforceCrossUserPermission(userId); 3376 throwIfLockdownEnabled(); 3377 3378 synchronized(mVpns) { 3379 Vpn vpn = mVpns.get(userId); 3380 if (vpn != null) { 3381 return vpn.prepare(oldPackage, newPackage); 3382 } else { 3383 return false; 3384 } 3385 } 3386 } 3387 3388 /** 3389 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3390 * This method is used by system-privileged apps. 3391 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3392 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3393 * 3394 * @param packageName The package for which authorization state should change. 3395 * @param userId User for whom {@code packageName} is installed. 3396 * @param authorized {@code true} if this app should be able to start a VPN connection without 3397 * explicit user approval, {@code false} if not. 3398 * 3399 * @hide 3400 */ 3401 @Override 3402 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3403 enforceCrossUserPermission(userId); 3404 3405 synchronized(mVpns) { 3406 Vpn vpn = mVpns.get(userId); 3407 if (vpn != null) { 3408 vpn.setPackageAuthorization(packageName, authorized); 3409 } 3410 } 3411 } 3412 3413 /** 3414 * Configure a TUN interface and return its file descriptor. Parameters 3415 * are encoded and opaque to this class. This method is used by VpnBuilder 3416 * and not available in ConnectivityManager. Permissions are checked in 3417 * Vpn class. 3418 * @hide 3419 */ 3420 @Override 3421 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3422 throwIfLockdownEnabled(); 3423 int user = UserHandle.getUserId(Binder.getCallingUid()); 3424 synchronized(mVpns) { 3425 return mVpns.get(user).establish(config); 3426 } 3427 } 3428 3429 /** 3430 * Start legacy VPN, controlling native daemons as needed. Creates a 3431 * secondary thread to perform connection work, returning quickly. 3432 */ 3433 @Override 3434 public void startLegacyVpn(VpnProfile profile) { 3435 throwIfLockdownEnabled(); 3436 final LinkProperties egress = getActiveLinkProperties(); 3437 if (egress == null) { 3438 throw new IllegalStateException("Missing active network connection"); 3439 } 3440 int user = UserHandle.getUserId(Binder.getCallingUid()); 3441 synchronized(mVpns) { 3442 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3443 } 3444 } 3445 3446 /** 3447 * Return the information of the ongoing legacy VPN. This method is used 3448 * by VpnSettings and not available in ConnectivityManager. Permissions 3449 * are checked in Vpn class. 3450 */ 3451 @Override 3452 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3453 enforceCrossUserPermission(userId); 3454 3455 synchronized(mVpns) { 3456 return mVpns.get(userId).getLegacyVpnInfo(); 3457 } 3458 } 3459 3460 /** 3461 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3462 * and not available in ConnectivityManager. 3463 */ 3464 @Override 3465 public VpnInfo[] getAllVpnInfo() { 3466 enforceConnectivityInternalPermission(); 3467 if (mLockdownEnabled) { 3468 return new VpnInfo[0]; 3469 } 3470 3471 synchronized(mVpns) { 3472 List<VpnInfo> infoList = new ArrayList<>(); 3473 for (int i = 0; i < mVpns.size(); i++) { 3474 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3475 if (info != null) { 3476 infoList.add(info); 3477 } 3478 } 3479 return infoList.toArray(new VpnInfo[infoList.size()]); 3480 } 3481 } 3482 3483 /** 3484 * @return VPN information for accounting, or null if we can't retrieve all required 3485 * information, e.g primary underlying iface. 3486 */ 3487 @Nullable 3488 private VpnInfo createVpnInfo(Vpn vpn) { 3489 VpnInfo info = vpn.getVpnInfo(); 3490 if (info == null) { 3491 return null; 3492 } 3493 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3494 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3495 // the underlyingNetworks list. 3496 if (underlyingNetworks == null) { 3497 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3498 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3499 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3500 } 3501 } else if (underlyingNetworks.length > 0) { 3502 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3503 if (linkProperties != null) { 3504 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3505 } 3506 } 3507 return info.primaryUnderlyingIface == null ? null : info; 3508 } 3509 3510 /** 3511 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3512 * VpnDialogs and not available in ConnectivityManager. 3513 * Permissions are checked in Vpn class. 3514 * @hide 3515 */ 3516 @Override 3517 public VpnConfig getVpnConfig(int userId) { 3518 enforceCrossUserPermission(userId); 3519 synchronized(mVpns) { 3520 Vpn vpn = mVpns.get(userId); 3521 if (vpn != null) { 3522 return vpn.getVpnConfig(); 3523 } else { 3524 return null; 3525 } 3526 } 3527 } 3528 3529 @Override 3530 public boolean updateLockdownVpn() { 3531 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3532 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3533 return false; 3534 } 3535 3536 // Tear down existing lockdown if profile was removed 3537 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3538 if (mLockdownEnabled) { 3539 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3540 final VpnProfile profile = VpnProfile.decode( 3541 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3542 if (profile == null) { 3543 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3544 setLockdownTracker(null); 3545 return true; 3546 } 3547 int user = UserHandle.getUserId(Binder.getCallingUid()); 3548 synchronized(mVpns) { 3549 Vpn vpn = mVpns.get(user); 3550 if (vpn == null) { 3551 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3552 return false; 3553 } 3554 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3555 } 3556 } else { 3557 setLockdownTracker(null); 3558 } 3559 3560 return true; 3561 } 3562 3563 /** 3564 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3565 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3566 */ 3567 private void setLockdownTracker(LockdownVpnTracker tracker) { 3568 // Shutdown any existing tracker 3569 final LockdownVpnTracker existing = mLockdownTracker; 3570 mLockdownTracker = null; 3571 if (existing != null) { 3572 existing.shutdown(); 3573 } 3574 3575 try { 3576 if (tracker != null) { 3577 mNetd.setFirewallEnabled(true); 3578 mNetd.setFirewallInterfaceRule("lo", true); 3579 mLockdownTracker = tracker; 3580 mLockdownTracker.init(); 3581 } else { 3582 mNetd.setFirewallEnabled(false); 3583 } 3584 } catch (RemoteException e) { 3585 // ignored; NMS lives inside system_server 3586 } 3587 } 3588 3589 private void throwIfLockdownEnabled() { 3590 if (mLockdownEnabled) { 3591 throw new IllegalStateException("Unavailable in lockdown mode"); 3592 } 3593 } 3594 3595 /** 3596 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3597 * some setup and then call {@code establish()} to connect. 3598 * 3599 * @return {@code true} if the service was started, the service was already connected, or there 3600 * was no always-on VPN to start. {@code false} otherwise. 3601 */ 3602 private boolean startAlwaysOnVpn(int userId) { 3603 synchronized (mVpns) { 3604 Vpn vpn = mVpns.get(userId); 3605 if (vpn == null) { 3606 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3607 // exists already. 3608 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3609 return false; 3610 } 3611 3612 return vpn.startAlwaysOnVpn(); 3613 } 3614 } 3615 3616 @Override 3617 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3618 enforceConnectivityInternalPermission(); 3619 enforceCrossUserPermission(userId); 3620 3621 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3622 if (LockdownVpnTracker.isEnabled()) { 3623 return false; 3624 } 3625 3626 synchronized (mVpns) { 3627 Vpn vpn = mVpns.get(userId); 3628 if (vpn == null) { 3629 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3630 return false; 3631 } 3632 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3633 return false; 3634 } 3635 if (!startAlwaysOnVpn(userId)) { 3636 vpn.setAlwaysOnPackage(null, false); 3637 return false; 3638 } 3639 3640 vpn.saveAlwaysOnPackage(); 3641 } 3642 return true; 3643 } 3644 3645 @Override 3646 public String getAlwaysOnVpnPackage(int userId) { 3647 enforceConnectivityInternalPermission(); 3648 enforceCrossUserPermission(userId); 3649 3650 synchronized (mVpns) { 3651 Vpn vpn = mVpns.get(userId); 3652 if (vpn == null) { 3653 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3654 return null; 3655 } 3656 return vpn.getAlwaysOnPackage(); 3657 } 3658 } 3659 3660 @Override 3661 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3662 // TODO: Remove? Any reason to trigger a provisioning check? 3663 return -1; 3664 } 3665 3666 /** Location to an updatable file listing carrier provisioning urls. 3667 * An example: 3668 * 3669 * <?xml version="1.0" encoding="utf-8"?> 3670 * <provisioningUrls> 3671 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3672 * </provisioningUrls> 3673 */ 3674 private static final String PROVISIONING_URL_PATH = 3675 "/data/misc/radio/provisioning_urls.xml"; 3676 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3677 3678 /** XML tag for root element. */ 3679 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3680 /** XML tag for individual url */ 3681 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3682 /** XML attribute for mcc */ 3683 private static final String ATTR_MCC = "mcc"; 3684 /** XML attribute for mnc */ 3685 private static final String ATTR_MNC = "mnc"; 3686 3687 private String getProvisioningUrlBaseFromFile() { 3688 FileReader fileReader = null; 3689 XmlPullParser parser = null; 3690 Configuration config = mContext.getResources().getConfiguration(); 3691 3692 try { 3693 fileReader = new FileReader(mProvisioningUrlFile); 3694 parser = Xml.newPullParser(); 3695 parser.setInput(fileReader); 3696 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3697 3698 while (true) { 3699 XmlUtils.nextElement(parser); 3700 3701 String element = parser.getName(); 3702 if (element == null) break; 3703 3704 if (element.equals(TAG_PROVISIONING_URL)) { 3705 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3706 try { 3707 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3708 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3709 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3710 parser.next(); 3711 if (parser.getEventType() == XmlPullParser.TEXT) { 3712 return parser.getText(); 3713 } 3714 } 3715 } 3716 } catch (NumberFormatException e) { 3717 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3718 } 3719 } 3720 } 3721 return null; 3722 } catch (FileNotFoundException e) { 3723 loge("Carrier Provisioning Urls file not found"); 3724 } catch (XmlPullParserException e) { 3725 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3726 } catch (IOException e) { 3727 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3728 } finally { 3729 if (fileReader != null) { 3730 try { 3731 fileReader.close(); 3732 } catch (IOException e) {} 3733 } 3734 } 3735 return null; 3736 } 3737 3738 @Override 3739 public String getMobileProvisioningUrl() { 3740 enforceConnectivityInternalPermission(); 3741 String url = getProvisioningUrlBaseFromFile(); 3742 if (TextUtils.isEmpty(url)) { 3743 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3744 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3745 } else { 3746 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3747 } 3748 // populate the iccid, imei and phone number in the provisioning url. 3749 if (!TextUtils.isEmpty(url)) { 3750 String phoneNumber = mTelephonyManager.getLine1Number(); 3751 if (TextUtils.isEmpty(phoneNumber)) { 3752 phoneNumber = "0000000000"; 3753 } 3754 url = String.format(url, 3755 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3756 mTelephonyManager.getDeviceId() /* IMEI */, 3757 phoneNumber /* Phone numer */); 3758 } 3759 3760 return url; 3761 } 3762 3763 @Override 3764 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3765 String action) { 3766 enforceConnectivityInternalPermission(); 3767 final long ident = Binder.clearCallingIdentity(); 3768 try { 3769 // Concatenate the range of types onto the range of NetIDs. 3770 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3771 mNotifier.setProvNotificationVisible(visible, id, action); 3772 } finally { 3773 Binder.restoreCallingIdentity(ident); 3774 } 3775 } 3776 3777 @Override 3778 public void setAirplaneMode(boolean enable) { 3779 enforceConnectivityInternalPermission(); 3780 final long ident = Binder.clearCallingIdentity(); 3781 try { 3782 final ContentResolver cr = mContext.getContentResolver(); 3783 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3784 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3785 intent.putExtra("state", enable); 3786 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3787 } finally { 3788 Binder.restoreCallingIdentity(ident); 3789 } 3790 } 3791 3792 private void onUserStart(int userId) { 3793 synchronized(mVpns) { 3794 Vpn userVpn = mVpns.get(userId); 3795 if (userVpn != null) { 3796 loge("Starting user already has a VPN"); 3797 return; 3798 } 3799 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3800 mVpns.put(userId, userVpn); 3801 3802 final ContentResolver cr = mContext.getContentResolver(); 3803 String alwaysOnPackage = Settings.Secure.getStringForUser(cr, 3804 Settings.Secure.ALWAYS_ON_VPN_APP, userId); 3805 final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, 3806 Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; 3807 if (alwaysOnPackage != null) { 3808 userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); 3809 } 3810 } 3811 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3812 updateLockdownVpn(); 3813 } 3814 } 3815 3816 private void onUserStop(int userId) { 3817 synchronized(mVpns) { 3818 Vpn userVpn = mVpns.get(userId); 3819 if (userVpn == null) { 3820 loge("Stopped user has no VPN"); 3821 return; 3822 } 3823 userVpn.onUserStopped(); 3824 mVpns.delete(userId); 3825 } 3826 } 3827 3828 private void onUserAdded(int userId) { 3829 synchronized(mVpns) { 3830 final int vpnsSize = mVpns.size(); 3831 for (int i = 0; i < vpnsSize; i++) { 3832 Vpn vpn = mVpns.valueAt(i); 3833 vpn.onUserAdded(userId); 3834 } 3835 } 3836 } 3837 3838 private void onUserRemoved(int userId) { 3839 synchronized(mVpns) { 3840 final int vpnsSize = mVpns.size(); 3841 for (int i = 0; i < vpnsSize; i++) { 3842 Vpn vpn = mVpns.valueAt(i); 3843 vpn.onUserRemoved(userId); 3844 } 3845 } 3846 } 3847 3848 private void onUserUnlocked(int userId) { 3849 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3850 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3851 updateLockdownVpn(); 3852 } else { 3853 startAlwaysOnVpn(userId); 3854 } 3855 } 3856 3857 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3858 @Override 3859 public void onReceive(Context context, Intent intent) { 3860 final String action = intent.getAction(); 3861 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3862 if (userId == UserHandle.USER_NULL) return; 3863 3864 if (Intent.ACTION_USER_STARTED.equals(action)) { 3865 onUserStart(userId); 3866 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3867 onUserStop(userId); 3868 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3869 onUserAdded(userId); 3870 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3871 onUserRemoved(userId); 3872 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3873 onUserUnlocked(userId); 3874 } 3875 } 3876 }; 3877 3878 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3879 new HashMap<Messenger, NetworkFactoryInfo>(); 3880 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3881 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3882 3883 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3884 // Map from UID to number of NetworkRequests that UID has filed. 3885 @GuardedBy("mUidToNetworkRequestCount") 3886 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3887 3888 private static class NetworkFactoryInfo { 3889 public final String name; 3890 public final Messenger messenger; 3891 public final AsyncChannel asyncChannel; 3892 3893 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3894 this.name = name; 3895 this.messenger = messenger; 3896 this.asyncChannel = asyncChannel; 3897 } 3898 } 3899 3900 private void ensureNetworkRequestHasType(NetworkRequest request) { 3901 if (request.type == NetworkRequest.Type.NONE) { 3902 throw new IllegalArgumentException( 3903 "All NetworkRequests in ConnectivityService must have a type"); 3904 } 3905 } 3906 3907 /** 3908 * Tracks info about the requester. 3909 * Also used to notice when the calling process dies so we can self-expire 3910 */ 3911 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3912 final NetworkRequest request; 3913 final PendingIntent mPendingIntent; 3914 boolean mPendingIntentSent; 3915 private final IBinder mBinder; 3916 final int mPid; 3917 final int mUid; 3918 final Messenger messenger; 3919 3920 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 3921 request = r; 3922 ensureNetworkRequestHasType(request); 3923 mPendingIntent = pi; 3924 messenger = null; 3925 mBinder = null; 3926 mPid = getCallingPid(); 3927 mUid = getCallingUid(); 3928 enforceRequestCountLimit(); 3929 } 3930 3931 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 3932 super(); 3933 messenger = m; 3934 request = r; 3935 ensureNetworkRequestHasType(request); 3936 mBinder = binder; 3937 mPid = getCallingPid(); 3938 mUid = getCallingUid(); 3939 mPendingIntent = null; 3940 enforceRequestCountLimit(); 3941 3942 try { 3943 mBinder.linkToDeath(this, 0); 3944 } catch (RemoteException e) { 3945 binderDied(); 3946 } 3947 } 3948 3949 private void enforceRequestCountLimit() { 3950 synchronized (mUidToNetworkRequestCount) { 3951 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 3952 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 3953 throw new IllegalArgumentException("Too many NetworkRequests filed"); 3954 } 3955 mUidToNetworkRequestCount.put(mUid, networkRequests); 3956 } 3957 } 3958 3959 void unlinkDeathRecipient() { 3960 if (mBinder != null) { 3961 mBinder.unlinkToDeath(this, 0); 3962 } 3963 } 3964 3965 public void binderDied() { 3966 log("ConnectivityService NetworkRequestInfo binderDied(" + 3967 request + ", " + mBinder + ")"); 3968 releaseNetworkRequest(request); 3969 } 3970 3971 public String toString() { 3972 return "uid/pid:" + mUid + "/" + mPid + " " + request + 3973 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3974 } 3975 } 3976 3977 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3978 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3979 if (badCapability != null) { 3980 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3981 } 3982 } 3983 3984 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3985 final SortedSet<Integer> thresholds = new TreeSet(); 3986 synchronized (nai) { 3987 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3988 if (nri.request.networkCapabilities.hasSignalStrength() && 3989 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3990 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3991 } 3992 } 3993 } 3994 return new ArrayList<Integer>(thresholds); 3995 } 3996 3997 private void updateSignalStrengthThresholds( 3998 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3999 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 4000 Bundle thresholds = new Bundle(); 4001 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 4002 4003 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 4004 String detail; 4005 if (request != null && request.networkCapabilities.hasSignalStrength()) { 4006 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 4007 } else { 4008 detail = reason; 4009 } 4010 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 4011 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 4012 } 4013 4014 nai.asyncChannel.sendMessage( 4015 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 4016 0, 0, thresholds); 4017 } 4018 4019 @Override 4020 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 4021 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 4022 final NetworkRequest.Type type = (networkCapabilities == null) 4023 ? NetworkRequest.Type.TRACK_DEFAULT 4024 : NetworkRequest.Type.REQUEST; 4025 // If the requested networkCapabilities is null, take them instead from 4026 // the default network request. This allows callers to keep track of 4027 // the system default network. 4028 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 4029 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 4030 enforceAccessPermission(); 4031 } else { 4032 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4033 enforceNetworkRequestPermissions(networkCapabilities); 4034 // TODO: this is incorrect. We mark the request as metered or not depending on the state 4035 // of the app when the request is filed, but we never change the request if the app 4036 // changes network state. http://b/29964605 4037 enforceMeteredApnPolicy(networkCapabilities); 4038 } 4039 ensureRequestableCapabilities(networkCapabilities); 4040 4041 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 4042 throw new IllegalArgumentException("Bad timeout specified"); 4043 } 4044 4045 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 4046 .equals(networkCapabilities.getNetworkSpecifier())) { 4047 throw new IllegalArgumentException("Invalid network specifier - must not be '" 4048 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 4049 } 4050 4051 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4052 nextNetworkRequestId(), type); 4053 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4054 if (DBG) log("requestNetwork for " + nri); 4055 4056 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4057 if (timeoutMs > 0) { 4058 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4059 nri), timeoutMs); 4060 } 4061 return networkRequest; 4062 } 4063 4064 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4065 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4066 enforceConnectivityRestrictedNetworksPermission(); 4067 } else { 4068 enforceChangePermission(); 4069 } 4070 } 4071 4072 @Override 4073 public boolean requestBandwidthUpdate(Network network) { 4074 enforceAccessPermission(); 4075 NetworkAgentInfo nai = null; 4076 if (network == null) { 4077 return false; 4078 } 4079 synchronized (mNetworkForNetId) { 4080 nai = mNetworkForNetId.get(network.netId); 4081 } 4082 if (nai != null) { 4083 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4084 return true; 4085 } 4086 return false; 4087 } 4088 4089 private boolean isSystem(int uid) { 4090 return uid < Process.FIRST_APPLICATION_UID; 4091 } 4092 4093 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4094 final int uid = Binder.getCallingUid(); 4095 if (isSystem(uid)) { 4096 return; 4097 } 4098 // if UID is restricted, don't allow them to bring up metered APNs 4099 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 4100 final int uidRules; 4101 synchronized(mRulesLock) { 4102 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 4103 } 4104 if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 4105 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { 4106 // we could silently fail or we can filter the available nets to only give 4107 // them those they have access to. Chose the more useful option. 4108 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4109 } 4110 } 4111 } 4112 4113 @Override 4114 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4115 PendingIntent operation) { 4116 checkNotNull(operation, "PendingIntent cannot be null."); 4117 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4118 enforceNetworkRequestPermissions(networkCapabilities); 4119 enforceMeteredApnPolicy(networkCapabilities); 4120 ensureRequestableCapabilities(networkCapabilities); 4121 4122 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4123 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4124 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4125 if (DBG) log("pendingRequest for " + nri); 4126 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4127 nri)); 4128 return networkRequest; 4129 } 4130 4131 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4132 mHandler.sendMessageDelayed( 4133 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4134 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4135 } 4136 4137 @Override 4138 public void releasePendingNetworkRequest(PendingIntent operation) { 4139 checkNotNull(operation, "PendingIntent cannot be null."); 4140 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4141 getCallingUid(), 0, operation)); 4142 } 4143 4144 // In order to implement the compatibility measure for pre-M apps that call 4145 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4146 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4147 // This ensures it has permission to do so. 4148 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4149 if (nc == null) { 4150 return false; 4151 } 4152 int[] transportTypes = nc.getTransportTypes(); 4153 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4154 return false; 4155 } 4156 try { 4157 mContext.enforceCallingOrSelfPermission( 4158 android.Manifest.permission.ACCESS_WIFI_STATE, 4159 "ConnectivityService"); 4160 } catch (SecurityException e) { 4161 return false; 4162 } 4163 return true; 4164 } 4165 4166 @Override 4167 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4168 Messenger messenger, IBinder binder) { 4169 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4170 enforceAccessPermission(); 4171 } 4172 4173 NetworkRequest networkRequest = new NetworkRequest( 4174 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4175 NetworkRequest.Type.LISTEN); 4176 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4177 if (VDBG) log("listenForNetwork for " + nri); 4178 4179 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4180 return networkRequest; 4181 } 4182 4183 @Override 4184 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4185 PendingIntent operation) { 4186 checkNotNull(operation, "PendingIntent cannot be null."); 4187 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4188 enforceAccessPermission(); 4189 } 4190 4191 NetworkRequest networkRequest = new NetworkRequest( 4192 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4193 NetworkRequest.Type.LISTEN); 4194 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4195 if (VDBG) log("pendingListenForNetwork for " + nri); 4196 4197 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4198 } 4199 4200 @Override 4201 public void requestLinkProperties(NetworkRequest networkRequest) { 4202 ensureNetworkRequestHasType(networkRequest); 4203 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4204 mHandler.sendMessage(mHandler.obtainMessage( 4205 EVENT_REQUEST_LINKPROPERTIES, getCallingUid(), 0, networkRequest)); 4206 } 4207 4208 @Override 4209 public void requestNetworkCapabilities(NetworkRequest networkRequest) { 4210 ensureNetworkRequestHasType(networkRequest); 4211 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4212 mHandler.sendMessage(mHandler.obtainMessage( 4213 EVENT_REQUEST_NETCAPABILITIES, getCallingUid(), 0, networkRequest)); 4214 } 4215 4216 @Override 4217 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4218 ensureNetworkRequestHasType(networkRequest); 4219 mHandler.sendMessage(mHandler.obtainMessage( 4220 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4221 } 4222 4223 @Override 4224 public void registerNetworkFactory(Messenger messenger, String name) { 4225 enforceConnectivityInternalPermission(); 4226 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4227 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4228 } 4229 4230 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4231 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4232 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4233 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4234 } 4235 4236 @Override 4237 public void unregisterNetworkFactory(Messenger messenger) { 4238 enforceConnectivityInternalPermission(); 4239 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4240 } 4241 4242 private void handleUnregisterNetworkFactory(Messenger messenger) { 4243 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4244 if (nfi == null) { 4245 loge("Failed to find Messenger in unregisterNetworkFactory"); 4246 return; 4247 } 4248 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4249 } 4250 4251 /** 4252 * NetworkAgentInfo supporting a request by requestId. 4253 * These have already been vetted (their Capabilities satisfy the request) 4254 * and the are the highest scored network available. 4255 * the are keyed off the Requests requestId. 4256 */ 4257 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4258 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4259 new SparseArray<NetworkAgentInfo>(); 4260 4261 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4262 @GuardedBy("mNetworkForNetId") 4263 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4264 new SparseArray<NetworkAgentInfo>(); 4265 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4266 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4267 // there may not be a strict 1:1 correlation between the two. 4268 @GuardedBy("mNetworkForNetId") 4269 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4270 4271 // NetworkAgentInfo keyed off its connecting messenger 4272 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4273 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4274 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4275 new HashMap<Messenger, NetworkAgentInfo>(); 4276 4277 @GuardedBy("mBlockedAppUids") 4278 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4279 4280 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4281 private final NetworkRequest mDefaultRequest; 4282 4283 // Request used to optionally keep mobile data active even when higher 4284 // priority networks like Wi-Fi are active. 4285 private final NetworkRequest mDefaultMobileDataRequest; 4286 4287 private NetworkAgentInfo getDefaultNetwork() { 4288 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4289 } 4290 4291 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4292 return nai == getDefaultNetwork(); 4293 } 4294 4295 private boolean isDefaultRequest(NetworkRequestInfo nri) { 4296 return nri.request.requestId == mDefaultRequest.requestId; 4297 } 4298 4299 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4300 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4301 int currentScore, NetworkMisc networkMisc) { 4302 enforceConnectivityInternalPermission(); 4303 4304 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4305 // satisfies mDefaultRequest. 4306 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4307 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4308 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4309 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4310 synchronized (this) { 4311 nai.networkMonitor.systemReady = mSystemReady; 4312 } 4313 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, 4314 networkInfo.getExtraInfo()); 4315 if (DBG) log("registerNetworkAgent " + nai); 4316 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4317 return nai.network.netId; 4318 } 4319 4320 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4321 if (VDBG) log("Got NetworkAgent Messenger"); 4322 mNetworkAgentInfos.put(na.messenger, na); 4323 synchronized (mNetworkForNetId) { 4324 mNetworkForNetId.put(na.network.netId, na); 4325 } 4326 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4327 NetworkInfo networkInfo = na.networkInfo; 4328 na.networkInfo = null; 4329 updateNetworkInfo(na, networkInfo); 4330 } 4331 4332 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4333 LinkProperties newLp = networkAgent.linkProperties; 4334 int netId = networkAgent.network.netId; 4335 4336 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4337 // we do anything else, make sure its LinkProperties are accurate. 4338 if (networkAgent.clatd != null) { 4339 networkAgent.clatd.fixupLinkProperties(oldLp); 4340 } 4341 4342 updateInterfaces(newLp, oldLp, netId); 4343 updateMtu(newLp, oldLp); 4344 // TODO - figure out what to do for clat 4345// for (LinkProperties lp : newLp.getStackedLinks()) { 4346// updateMtu(lp, null); 4347// } 4348 updateTcpBufferSizes(networkAgent); 4349 4350 updateRoutes(newLp, oldLp, netId); 4351 updateDnses(newLp, oldLp, netId); 4352 4353 updateClat(newLp, oldLp, networkAgent); 4354 if (isDefaultNetwork(networkAgent)) { 4355 handleApplyDefaultProxy(newLp.getHttpProxy()); 4356 } else { 4357 updateProxy(newLp, oldLp, networkAgent); 4358 } 4359 // TODO - move this check to cover the whole function 4360 if (!Objects.equals(newLp, oldLp)) { 4361 notifyIfacesChangedForNetworkStats(); 4362 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4363 } 4364 4365 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4366 } 4367 4368 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4369 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4370 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4371 4372 if (!wasRunningClat && shouldRunClat) { 4373 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4374 nai.clatd.start(); 4375 } else if (wasRunningClat && !shouldRunClat) { 4376 nai.clatd.stop(); 4377 } 4378 } 4379 4380 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4381 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4382 if (oldLp != null) { 4383 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4384 } else if (newLp != null) { 4385 interfaceDiff.added = newLp.getAllInterfaceNames(); 4386 } 4387 for (String iface : interfaceDiff.added) { 4388 try { 4389 if (DBG) log("Adding iface " + iface + " to network " + netId); 4390 mNetd.addInterfaceToNetwork(iface, netId); 4391 } catch (Exception e) { 4392 loge("Exception adding interface: " + e); 4393 } 4394 } 4395 for (String iface : interfaceDiff.removed) { 4396 try { 4397 if (DBG) log("Removing iface " + iface + " from network " + netId); 4398 mNetd.removeInterfaceFromNetwork(iface, netId); 4399 } catch (Exception e) { 4400 loge("Exception removing interface: " + e); 4401 } 4402 } 4403 } 4404 4405 /** 4406 * Have netd update routes from oldLp to newLp. 4407 * @return true if routes changed between oldLp and newLp 4408 */ 4409 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4410 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4411 if (oldLp != null) { 4412 routeDiff = oldLp.compareAllRoutes(newLp); 4413 } else if (newLp != null) { 4414 routeDiff.added = newLp.getAllRoutes(); 4415 } 4416 4417 // add routes before removing old in case it helps with continuous connectivity 4418 4419 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4420 for (RouteInfo route : routeDiff.added) { 4421 if (route.hasGateway()) continue; 4422 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4423 try { 4424 mNetd.addRoute(netId, route); 4425 } catch (Exception e) { 4426 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4427 loge("Exception in addRoute for non-gateway: " + e); 4428 } 4429 } 4430 } 4431 for (RouteInfo route : routeDiff.added) { 4432 if (route.hasGateway() == false) continue; 4433 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4434 try { 4435 mNetd.addRoute(netId, route); 4436 } catch (Exception e) { 4437 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4438 loge("Exception in addRoute for gateway: " + e); 4439 } 4440 } 4441 } 4442 4443 for (RouteInfo route : routeDiff.removed) { 4444 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4445 try { 4446 mNetd.removeRoute(netId, route); 4447 } catch (Exception e) { 4448 loge("Exception in removeRoute: " + e); 4449 } 4450 } 4451 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4452 } 4453 4454 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4455 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4456 return; // no updating necessary 4457 } 4458 4459 Collection<InetAddress> dnses = newLp.getDnsServers(); 4460 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4461 try { 4462 mNetd.setDnsConfigurationForNetwork( 4463 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4464 } catch (Exception e) { 4465 loge("Exception in setDnsConfigurationForNetwork: " + e); 4466 } 4467 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4468 if (defaultNai != null && defaultNai.network.netId == netId) { 4469 setDefaultDnsSystemProperties(dnses); 4470 } 4471 flushVmDnsCache(); 4472 } 4473 4474 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4475 int last = 0; 4476 for (InetAddress dns : dnses) { 4477 ++last; 4478 String key = "net.dns" + last; 4479 String value = dns.getHostAddress(); 4480 SystemProperties.set(key, value); 4481 } 4482 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4483 String key = "net.dns" + i; 4484 SystemProperties.set(key, ""); 4485 } 4486 mNumDnsEntries = last; 4487 } 4488 4489 /** 4490 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4491 * augmented with any stateful capabilities implied from {@code networkAgent} 4492 * (e.g., validated status and captive portal status). 4493 * 4494 * @param oldScore score of the network before any of the changes that prompted us 4495 * to call this function. 4496 * @param nai the network having its capabilities updated. 4497 * @param networkCapabilities the new network capabilities. 4498 */ 4499 private void updateCapabilities( 4500 int oldScore, NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4501 if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( 4502 networkCapabilities)) { 4503 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 4504 + nai.networkCapabilities + " -> " + networkCapabilities); 4505 } 4506 4507 // Don't modify caller's NetworkCapabilities. 4508 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4509 if (nai.lastValidated) { 4510 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4511 } else { 4512 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4513 } 4514 if (nai.lastCaptivePortalDetected) { 4515 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4516 } else { 4517 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4518 } 4519 if (nai.isBackgroundNetwork()) { 4520 networkCapabilities.removeCapability(NET_CAPABILITY_FOREGROUND); 4521 } else { 4522 networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 4523 } 4524 4525 if (Objects.equals(nai.networkCapabilities, networkCapabilities)) return; 4526 4527 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4528 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4529 try { 4530 mNetd.setNetworkPermission(nai.network.netId, 4531 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4532 null : NetworkManagementService.PERMISSION_SYSTEM); 4533 } catch (RemoteException e) { 4534 loge("Exception in setNetworkPermission: " + e); 4535 } 4536 } 4537 4538 final NetworkCapabilities prevNc = nai.networkCapabilities; 4539 synchronized (nai) { 4540 nai.networkCapabilities = networkCapabilities; 4541 } 4542 if (nai.getCurrentScore() == oldScore && 4543 networkCapabilities.equalRequestableCapabilities(prevNc)) { 4544 // If the requestable capabilities haven't changed, and the score hasn't changed, then 4545 // the change we're processing can't affect any requests, it can only affect the listens 4546 // on this network. We might have been called by rematchNetworkAndRequests when a 4547 // network changed foreground state. 4548 processListenRequests(nai, true); 4549 } else { 4550 // If the requestable capabilities have changed or the score changed, we can't have been 4551 // called by rematchNetworkAndRequests, so it's safe to start a rematch. 4552 rematchAllNetworksAndRequests(nai, oldScore); 4553 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4554 } 4555 } 4556 4557 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4558 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4559 NetworkRequest nr = nai.requestAt(i); 4560 // Don't send listening requests to factories. b/17393458 4561 if (nr.isListen()) continue; 4562 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4563 } 4564 } 4565 4566 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4567 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4568 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4569 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4570 networkRequest); 4571 } 4572 } 4573 4574 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4575 int notificationType) { 4576 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4577 Intent intent = new Intent(); 4578 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4579 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4580 nri.mPendingIntentSent = true; 4581 sendIntent(nri.mPendingIntent, intent); 4582 } 4583 // else not handled 4584 } 4585 4586 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4587 mPendingIntentWakeLock.acquire(); 4588 try { 4589 if (DBG) log("Sending " + pendingIntent); 4590 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4591 } catch (PendingIntent.CanceledException e) { 4592 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4593 mPendingIntentWakeLock.release(); 4594 releasePendingNetworkRequest(pendingIntent); 4595 } 4596 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4597 } 4598 4599 @Override 4600 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4601 String resultData, Bundle resultExtras) { 4602 if (DBG) log("Finished sending " + pendingIntent); 4603 mPendingIntentWakeLock.release(); 4604 // Release with a delay so the receiving client has an opportunity to put in its 4605 // own request. 4606 releasePendingNetworkRequestWithDelay(pendingIntent); 4607 } 4608 4609 private void callCallbackForRequest(NetworkRequestInfo nri, 4610 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 4611 if (nri.messenger == null) return; // Default request has no msgr 4612 Bundle bundle = new Bundle(); 4613 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4614 new NetworkRequest(nri.request)); 4615 Message msg = Message.obtain(); 4616 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4617 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4618 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4619 } 4620 switch (notificationType) { 4621 case ConnectivityManager.CALLBACK_LOSING: { 4622 msg.arg1 = arg1; 4623 break; 4624 } 4625 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4626 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4627 new NetworkCapabilities(networkAgent.networkCapabilities)); 4628 break; 4629 } 4630 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4631 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4632 new LinkProperties(networkAgent.linkProperties)); 4633 break; 4634 } 4635 } 4636 msg.what = notificationType; 4637 msg.setData(bundle); 4638 try { 4639 if (VDBG) { 4640 log("sending notification " + notifyTypeToName(notificationType) + 4641 " for " + nri.request); 4642 } 4643 nri.messenger.send(msg); 4644 } catch (RemoteException e) { 4645 // may occur naturally in the race of binder death. 4646 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4647 } 4648 } 4649 4650 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4651 if (nai.numRequestNetworkRequests() != 0) { 4652 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4653 NetworkRequest nr = nai.requestAt(i); 4654 // Ignore listening requests. 4655 if (nr.isListen()) continue; 4656 loge("Dead network still had at least " + nr); 4657 break; 4658 } 4659 } 4660 nai.asyncChannel.disconnect(); 4661 } 4662 4663 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4664 if (oldNetwork == null) { 4665 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4666 return; 4667 } 4668 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4669 4670 // If we get here it means that the last linger timeout for this network expired. So there 4671 // must be no other active linger timers, and we must stop lingering. 4672 oldNetwork.clearLingerState(); 4673 4674 if (unneeded(oldNetwork, UnneededFor.TEARDOWN)) { 4675 // Tear the network down. 4676 teardownUnneededNetwork(oldNetwork); 4677 } else { 4678 // Put the network in the background. 4679 updateCapabilities(oldNetwork.getCurrentScore(), oldNetwork, 4680 oldNetwork.networkCapabilities); 4681 } 4682 } 4683 4684 private void makeDefault(NetworkAgentInfo newNetwork) { 4685 if (DBG) log("Switching to new default network: " + newNetwork); 4686 setupDataActivityTracking(newNetwork); 4687 try { 4688 mNetd.setDefaultNetId(newNetwork.network.netId); 4689 } catch (Exception e) { 4690 loge("Exception setting default network :" + e); 4691 } 4692 notifyLockdownVpn(newNetwork); 4693 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4694 updateTcpBufferSizes(newNetwork); 4695 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4696 } 4697 4698 private void processListenRequests(NetworkAgentInfo nai, boolean capabilitiesChanged) { 4699 // For consistency with previous behaviour, send onLost callbacks before onAvailable. 4700 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4701 NetworkRequest nr = nri.request; 4702 if (!nr.isListen()) continue; 4703 if (nai.isSatisfyingRequest(nr.requestId) && !nai.satisfies(nr)) { 4704 nai.removeRequest(nri.request.requestId); 4705 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_LOST, 0); 4706 } 4707 } 4708 4709 if (capabilitiesChanged) { 4710 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4711 } 4712 4713 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4714 NetworkRequest nr = nri.request; 4715 if (!nr.isListen()) continue; 4716 if (nai.satisfies(nr) && !nai.isSatisfyingRequest(nr.requestId)) { 4717 nai.addRequest(nr); 4718 notifyNetworkCallback(nai, nri); 4719 } 4720 } 4721 } 4722 4723 // Handles a network appearing or improving its score. 4724 // 4725 // - Evaluates all current NetworkRequests that can be 4726 // satisfied by newNetwork, and reassigns to newNetwork 4727 // any such requests for which newNetwork is the best. 4728 // 4729 // - Lingers any validated Networks that as a result are no longer 4730 // needed. A network is needed if it is the best network for 4731 // one or more NetworkRequests, or if it is a VPN. 4732 // 4733 // - Tears down newNetwork if it just became validated 4734 // but turns out to be unneeded. 4735 // 4736 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4737 // networks that have no chance (i.e. even if validated) 4738 // of becoming the highest scoring network. 4739 // 4740 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4741 // it does not remove NetworkRequests that other Networks could better satisfy. 4742 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4743 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4744 // as it performs better by a factor of the number of Networks. 4745 // 4746 // @param newNetwork is the network to be matched against NetworkRequests. 4747 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4748 // performed to tear down unvalidated networks that have no chance (i.e. even if 4749 // validated) of becoming the highest scoring network. 4750 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4751 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 4752 if (!newNetwork.everConnected) return; 4753 boolean keep = newNetwork.isVPN(); 4754 boolean isNewDefault = false; 4755 NetworkAgentInfo oldDefaultNetwork = null; 4756 4757 final boolean wasBackgroundNetwork = newNetwork.isBackgroundNetwork(); 4758 final int score = newNetwork.getCurrentScore(); 4759 4760 if (VDBG) log("rematching " + newNetwork.name()); 4761 4762 // Find and migrate to this Network any NetworkRequests for 4763 // which this network is now the best. 4764 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4765 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4766 NetworkCapabilities nc = newNetwork.networkCapabilities; 4767 if (VDBG) log(" network has: " + nc); 4768 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4769 // Process requests in the first pass and listens in the second pass. This allows us to 4770 // change a network's capabilities depending on which requests it has. This is only 4771 // correct if the change in capabilities doesn't affect whether the network satisfies 4772 // requests or not, and doesn't affect the network's score. 4773 if (nri.request.isListen()) continue; 4774 4775 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4776 final boolean satisfies = newNetwork.satisfies(nri.request); 4777 if (newNetwork == currentNetwork && satisfies) { 4778 if (VDBG) { 4779 log("Network " + newNetwork.name() + " was already satisfying" + 4780 " request " + nri.request.requestId + ". No change."); 4781 } 4782 keep = true; 4783 continue; 4784 } 4785 4786 // check if it satisfies the NetworkCapabilities 4787 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4788 if (satisfies) { 4789 // next check if it's better than any current network we're using for 4790 // this request 4791 if (VDBG) { 4792 log("currentScore = " + 4793 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4794 ", newScore = " + score); 4795 } 4796 if (currentNetwork == null || currentNetwork.getCurrentScore() < score) { 4797 if (VDBG) log("rematch for " + newNetwork.name()); 4798 if (currentNetwork != null) { 4799 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4800 currentNetwork.removeRequest(nri.request.requestId); 4801 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 4802 affectedNetworks.add(currentNetwork); 4803 } else { 4804 if (VDBG) log(" accepting network in place of null"); 4805 } 4806 newNetwork.unlingerRequest(nri.request); 4807 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4808 if (!newNetwork.addRequest(nri.request)) { 4809 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4810 } 4811 addedRequests.add(nri); 4812 keep = true; 4813 // Tell NetworkFactories about the new score, so they can stop 4814 // trying to connect if they know they cannot match it. 4815 // TODO - this could get expensive if we have alot of requests for this 4816 // network. Think about if there is a way to reduce this. Push 4817 // netid->request mapping to each factory? 4818 sendUpdatedScoreToFactories(nri.request, score); 4819 if (isDefaultRequest(nri)) { 4820 isNewDefault = true; 4821 oldDefaultNetwork = currentNetwork; 4822 if (currentNetwork != null) { 4823 mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork); 4824 } 4825 } 4826 } 4827 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 4828 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4829 // mark it as no longer satisfying "nri". Because networks are processed by 4830 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4831 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4832 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4833 // This means this code doesn't have to handle the case where "currentNetwork" no 4834 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4835 if (DBG) { 4836 log("Network " + newNetwork.name() + " stopped satisfying" + 4837 " request " + nri.request.requestId); 4838 } 4839 newNetwork.removeRequest(nri.request.requestId); 4840 if (currentNetwork == newNetwork) { 4841 mNetworkForRequestId.remove(nri.request.requestId); 4842 sendUpdatedScoreToFactories(nri.request, 0); 4843 } else { 4844 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4845 newNetwork.name() + 4846 " without updating mNetworkForRequestId or factories!"); 4847 } 4848 // TODO: Technically, sending CALLBACK_LOST here is 4849 // incorrect if there is a replacement network currently 4850 // connected that can satisfy nri, which is a request 4851 // (not a listen). However, the only capability that can both 4852 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4853 // so this code is only incorrect for a network that loses 4854 // the TRUSTED capability, which is a rare case. 4855 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 4856 } 4857 } 4858 if (isNewDefault) { 4859 // Notify system services that this network is up. 4860 makeDefault(newNetwork); 4861 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 4862 logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); 4863 synchronized (ConnectivityService.this) { 4864 // have a new default network, release the transition wakelock in 4865 // a second if it's held. The second pause is to allow apps 4866 // to reconnect over the new network 4867 if (mNetTransitionWakeLock.isHeld()) { 4868 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4869 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4870 mNetTransitionWakeLockSerialNumber, 0), 4871 1000); 4872 } 4873 } 4874 } 4875 4876 if (!newNetwork.networkCapabilities.equalRequestableCapabilities(nc)) { 4877 Slog.wtf(TAG, String.format( 4878 "BUG: %s changed requestable capabilities during rematch: %s -> %s", 4879 nc, newNetwork.networkCapabilities)); 4880 } 4881 if (newNetwork.getCurrentScore() != score) { 4882 Slog.wtf(TAG, String.format( 4883 "BUG: %s changed score during rematch: %d -> %d", 4884 score, newNetwork.getCurrentScore())); 4885 } 4886 4887 // Second pass: process all listens. 4888 if (wasBackgroundNetwork != newNetwork.isBackgroundNetwork()) { 4889 // If the network went from background to foreground or vice versa, we need to update 4890 // its foreground state. It is safe to do this after rematching the requests because 4891 // NET_CAPABILITY_FOREGROUND does not affect requests, as is not a requestable 4892 // capability and does not affect the network's score (see the Slog.wtf call above). 4893 updateCapabilities(score, newNetwork, newNetwork.networkCapabilities); 4894 } else { 4895 processListenRequests(newNetwork, false); 4896 } 4897 4898 // do this after the default net is switched, but 4899 // before LegacyTypeTracker sends legacy broadcasts 4900 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4901 4902 // Linger any networks that are no longer needed. This should be done after sending the 4903 // available callback for newNetwork. 4904 for (NetworkAgentInfo nai : affectedNetworks) { 4905 updateLingerState(nai, now); 4906 } 4907 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 4908 // does not need to be done in any particular order. 4909 updateLingerState(newNetwork, now); 4910 4911 if (isNewDefault) { 4912 // Maintain the illusion: since the legacy API only 4913 // understands one network at a time, we must pretend 4914 // that the current default network disconnected before 4915 // the new one connected. 4916 if (oldDefaultNetwork != null) { 4917 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4918 oldDefaultNetwork, true); 4919 } 4920 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4921 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4922 notifyLockdownVpn(newNetwork); 4923 } 4924 4925 if (keep) { 4926 // Notify battery stats service about this network, both the normal 4927 // interface and any stacked links. 4928 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4929 try { 4930 final IBatteryStats bs = BatteryStatsService.getService(); 4931 final int type = newNetwork.networkInfo.getType(); 4932 4933 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4934 bs.noteNetworkInterfaceType(baseIface, type); 4935 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4936 final String stackedIface = stacked.getInterfaceName(); 4937 bs.noteNetworkInterfaceType(stackedIface, type); 4938 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4939 } 4940 } catch (RemoteException ignored) { 4941 } 4942 4943 // This has to happen after the notifyNetworkCallbacks as that tickles each 4944 // ConnectivityManager instance so that legacy requests correctly bind dns 4945 // requests to this network. The legacy users are listening for this bcast 4946 // and will generally do a dns request so they can ensureRouteToHost and if 4947 // they do that before the callbacks happen they'll use the default network. 4948 // 4949 // TODO: Is there still a race here? We send the broadcast 4950 // after sending the callback, but if the app can receive the 4951 // broadcast before the callback, it might still break. 4952 // 4953 // This *does* introduce a race where if the user uses the new api 4954 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4955 // they may get old info. Reverse this after the old startUsing api is removed. 4956 // This is on top of the multiple intent sequencing referenced in the todo above. 4957 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 4958 NetworkRequest nr = newNetwork.requestAt(i); 4959 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 4960 // legacy type tracker filters out repeat adds 4961 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4962 } 4963 } 4964 4965 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4966 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4967 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4968 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4969 if (newNetwork.isVPN()) { 4970 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4971 } 4972 } 4973 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4974 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4975 if (unneeded(nai, UnneededFor.TEARDOWN)) { 4976 if (nai.getLingerExpiry() > 0) { 4977 // This network has active linger timers and no requests, but is not 4978 // lingering. Linger it. 4979 // 4980 // One way (the only way?) this can happen if this network is unvalidated 4981 // and became unneeded due to another network improving its score to the 4982 // point where this network will no longer be able to satisfy any requests 4983 // even if it validates. 4984 updateLingerState(nai, now); 4985 } else { 4986 if (DBG) log("Reaping " + nai.name()); 4987 teardownUnneededNetwork(nai); 4988 } 4989 } 4990 } 4991 } 4992 } 4993 4994 /** 4995 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4996 * being disconnected. 4997 * @param changed If only one Network's score or capabilities have been modified since the last 4998 * time this function was called, pass this Network in this argument, otherwise pass 4999 * null. 5000 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 5001 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 5002 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 5003 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 5004 * network's score. 5005 */ 5006 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 5007 // TODO: This may get slow. The "changed" parameter is provided for future optimization 5008 // to avoid the slowness. It is not simply enough to process just "changed", for 5009 // example in the case where "changed"'s score decreases and another network should begin 5010 // satifying a NetworkRequest that "changed" currently satisfies. 5011 5012 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 5013 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 5014 // rematchNetworkAndRequests() handles. 5015 final long now = SystemClock.elapsedRealtime(); 5016 if (changed != null && oldScore < changed.getCurrentScore()) { 5017 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 5018 } else { 5019 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 5020 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 5021 // Rematch higher scoring networks first to prevent requests first matching a lower 5022 // scoring network and then a higher scoring network, which could produce multiple 5023 // callbacks and inadvertently unlinger networks. 5024 Arrays.sort(nais); 5025 for (NetworkAgentInfo nai : nais) { 5026 rematchNetworkAndRequests(nai, 5027 // Only reap the last time through the loop. Reaping before all rematching 5028 // is complete could incorrectly teardown a network that hasn't yet been 5029 // rematched. 5030 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 5031 : ReapUnvalidatedNetworks.REAP, 5032 now); 5033 } 5034 } 5035 } 5036 5037 private void updateInetCondition(NetworkAgentInfo nai) { 5038 // Don't bother updating until we've graduated to validated at least once. 5039 if (!nai.everValidated) return; 5040 // For now only update icons for default connection. 5041 // TODO: Update WiFi and cellular icons separately. b/17237507 5042 if (!isDefaultNetwork(nai)) return; 5043 5044 int newInetCondition = nai.lastValidated ? 100 : 0; 5045 // Don't repeat publish. 5046 if (newInetCondition == mDefaultInetConditionPublished) return; 5047 5048 mDefaultInetConditionPublished = newInetCondition; 5049 sendInetConditionBroadcast(nai.networkInfo); 5050 } 5051 5052 private void notifyLockdownVpn(NetworkAgentInfo nai) { 5053 if (mLockdownTracker != null) { 5054 if (nai != null && nai.isVPN()) { 5055 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 5056 } else { 5057 mLockdownTracker.onNetworkInfoChanged(); 5058 } 5059 } 5060 } 5061 5062 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 5063 NetworkInfo.State state = newInfo.getState(); 5064 NetworkInfo oldInfo = null; 5065 final int oldScore = networkAgent.getCurrentScore(); 5066 synchronized (networkAgent) { 5067 oldInfo = networkAgent.networkInfo; 5068 networkAgent.networkInfo = newInfo; 5069 } 5070 notifyLockdownVpn(networkAgent); 5071 5072 if (oldInfo != null && oldInfo.getState() == state) { 5073 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 5074 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 5075 notifyIfacesChangedForNetworkStats(); 5076 } else if (VDBG) log("ignoring duplicate network state non-change"); 5077 // In either case, no further work should be needed. 5078 return; 5079 } 5080 if (DBG) { 5081 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 5082 (oldInfo == null ? "null" : oldInfo.getState()) + 5083 " to " + state); 5084 } 5085 5086 if (!networkAgent.created 5087 && (state == NetworkInfo.State.CONNECTED 5088 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 5089 5090 // A network that has just connected has zero requests and is thus a foreground network. 5091 networkAgent.networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 5092 5093 try { 5094 // This should never fail. Specifying an already in use NetID will cause failure. 5095 if (networkAgent.isVPN()) { 5096 mNetd.createVirtualNetwork(networkAgent.network.netId, 5097 !networkAgent.linkProperties.getDnsServers().isEmpty(), 5098 (networkAgent.networkMisc == null || 5099 !networkAgent.networkMisc.allowBypass)); 5100 } else { 5101 mNetd.createPhysicalNetwork(networkAgent.network.netId, 5102 networkAgent.networkCapabilities.hasCapability( 5103 NET_CAPABILITY_NOT_RESTRICTED) ? 5104 null : NetworkManagementService.PERMISSION_SYSTEM); 5105 } 5106 } catch (Exception e) { 5107 loge("Error creating network " + networkAgent.network.netId + ": " 5108 + e.getMessage()); 5109 return; 5110 } 5111 networkAgent.created = true; 5112 } 5113 5114 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 5115 networkAgent.everConnected = true; 5116 5117 updateLinkProperties(networkAgent, null); 5118 notifyIfacesChangedForNetworkStats(); 5119 5120 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 5121 scheduleUnvalidatedPrompt(networkAgent); 5122 5123 if (networkAgent.isVPN()) { 5124 // Temporarily disable the default proxy (not global). 5125 synchronized (mProxyLock) { 5126 if (!mDefaultProxyDisabled) { 5127 mDefaultProxyDisabled = true; 5128 if (mGlobalProxy == null && mDefaultProxy != null) { 5129 sendProxyBroadcast(null); 5130 } 5131 } 5132 } 5133 // TODO: support proxy per network. 5134 } 5135 5136 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5137 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5138 // capabilities, so it only needs to be done once on initial connect, not every time the 5139 // network's capabilities change. Note that we do this before rematching the network, 5140 // so we could decide to tear it down immediately afterwards. That's fine though - on 5141 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5142 // doing. 5143 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5144 5145 // Consider network even though it is not yet validated. 5146 final long now = SystemClock.elapsedRealtime(); 5147 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5148 5149 // This has to happen after matching the requests, because callbacks are just requests. 5150 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5151 } else if (state == NetworkInfo.State.DISCONNECTED) { 5152 networkAgent.asyncChannel.disconnect(); 5153 if (networkAgent.isVPN()) { 5154 synchronized (mProxyLock) { 5155 if (mDefaultProxyDisabled) { 5156 mDefaultProxyDisabled = false; 5157 if (mGlobalProxy == null && mDefaultProxy != null) { 5158 sendProxyBroadcast(mDefaultProxy); 5159 } 5160 } 5161 } 5162 } 5163 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5164 state == NetworkInfo.State.SUSPENDED) { 5165 // going into or coming out of SUSPEND: rescore and notify 5166 if (networkAgent.getCurrentScore() != oldScore) { 5167 rematchAllNetworksAndRequests(networkAgent, oldScore); 5168 } 5169 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5170 ConnectivityManager.CALLBACK_SUSPENDED : 5171 ConnectivityManager.CALLBACK_RESUMED)); 5172 mLegacyTypeTracker.update(networkAgent); 5173 } 5174 } 5175 5176 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5177 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5178 if (score < 0) { 5179 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5180 "). Bumping score to min of 0"); 5181 score = 0; 5182 } 5183 5184 final int oldScore = nai.getCurrentScore(); 5185 nai.setCurrentScore(score); 5186 5187 rematchAllNetworksAndRequests(nai, oldScore); 5188 5189 sendUpdatedScoreToFactories(nai); 5190 } 5191 5192 // notify only this one new request of the current state 5193 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5194 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 5195 if (nri.mPendingIntent == null) { 5196 callCallbackForRequest(nri, nai, notifyType, 0); 5197 } else { 5198 sendPendingIntentForRequest(nri, nai, notifyType); 5199 } 5200 } 5201 5202 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5203 // The NetworkInfo we actually send out has no bearing on the real 5204 // state of affairs. For example, if the default connection is mobile, 5205 // and a request for HIPRI has just gone away, we need to pretend that 5206 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5207 // the state to DISCONNECTED, even though the network is of type MOBILE 5208 // and is still connected. 5209 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5210 info.setType(type); 5211 if (state != DetailedState.DISCONNECTED) { 5212 info.setDetailedState(state, null, info.getExtraInfo()); 5213 sendConnectedBroadcast(info); 5214 } else { 5215 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5216 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5217 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5218 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5219 if (info.isFailover()) { 5220 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5221 nai.networkInfo.setFailover(false); 5222 } 5223 if (info.getReason() != null) { 5224 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5225 } 5226 if (info.getExtraInfo() != null) { 5227 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5228 } 5229 NetworkAgentInfo newDefaultAgent = null; 5230 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5231 newDefaultAgent = getDefaultNetwork(); 5232 if (newDefaultAgent != null) { 5233 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5234 newDefaultAgent.networkInfo); 5235 } else { 5236 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5237 } 5238 } 5239 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5240 mDefaultInetConditionPublished); 5241 sendStickyBroadcast(intent); 5242 if (newDefaultAgent != null) { 5243 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5244 } 5245 } 5246 } 5247 5248 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5249 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5250 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5251 NetworkRequest nr = networkAgent.requestAt(i); 5252 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5253 if (VDBG) log(" sending notification for " + nr); 5254 // TODO: if we're in the middle of a rematch, can we send a CAP_CHANGED callback for 5255 // a network that no longer satisfies the listen? 5256 if (nri.mPendingIntent == null) { 5257 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5258 } else { 5259 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5260 } 5261 } 5262 } 5263 5264 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5265 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5266 } 5267 5268 private String notifyTypeToName(int notifyType) { 5269 switch (notifyType) { 5270 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5271 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5272 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5273 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5274 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5275 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5276 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5277 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5278 } 5279 return "UNKNOWN"; 5280 } 5281 5282 /** 5283 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5284 * properties tracked by NetworkStatsService on an active iface has changed. 5285 */ 5286 private void notifyIfacesChangedForNetworkStats() { 5287 try { 5288 mStatsService.forceUpdateIfaces(); 5289 } catch (Exception ignored) { 5290 } 5291 } 5292 5293 @Override 5294 public boolean addVpnAddress(String address, int prefixLength) { 5295 throwIfLockdownEnabled(); 5296 int user = UserHandle.getUserId(Binder.getCallingUid()); 5297 synchronized (mVpns) { 5298 return mVpns.get(user).addAddress(address, prefixLength); 5299 } 5300 } 5301 5302 @Override 5303 public boolean removeVpnAddress(String address, int prefixLength) { 5304 throwIfLockdownEnabled(); 5305 int user = UserHandle.getUserId(Binder.getCallingUid()); 5306 synchronized (mVpns) { 5307 return mVpns.get(user).removeAddress(address, prefixLength); 5308 } 5309 } 5310 5311 @Override 5312 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5313 throwIfLockdownEnabled(); 5314 int user = UserHandle.getUserId(Binder.getCallingUid()); 5315 boolean success; 5316 synchronized (mVpns) { 5317 success = mVpns.get(user).setUnderlyingNetworks(networks); 5318 } 5319 if (success) { 5320 notifyIfacesChangedForNetworkStats(); 5321 } 5322 return success; 5323 } 5324 5325 @Override 5326 public String getCaptivePortalServerUrl() { 5327 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5328 } 5329 5330 @Override 5331 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5332 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5333 enforceKeepalivePermission(); 5334 mKeepaliveTracker.startNattKeepalive( 5335 getNetworkAgentInfoForNetwork(network), 5336 intervalSeconds, messenger, binder, 5337 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5338 } 5339 5340 @Override 5341 public void stopKeepalive(Network network, int slot) { 5342 mHandler.sendMessage(mHandler.obtainMessage( 5343 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5344 } 5345 5346 @Override 5347 public void factoryReset() { 5348 enforceConnectivityInternalPermission(); 5349 5350 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5351 return; 5352 } 5353 5354 final int userId = UserHandle.getCallingUserId(); 5355 5356 // Turn airplane mode off 5357 setAirplaneMode(false); 5358 5359 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5360 // Untether 5361 for (String tether : getTetheredIfaces()) { 5362 untether(tether); 5363 } 5364 } 5365 5366 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5367 // Remove always-on package 5368 synchronized (mVpns) { 5369 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5370 if (alwaysOnPackage != null) { 5371 setAlwaysOnVpnPackage(userId, null, false); 5372 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5373 } 5374 } 5375 5376 // Turn VPN off 5377 VpnConfig vpnConfig = getVpnConfig(userId); 5378 if (vpnConfig != null) { 5379 if (vpnConfig.legacy) { 5380 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5381 } else { 5382 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5383 // in the future without user intervention. 5384 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5385 5386 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5387 } 5388 } 5389 } 5390 } 5391 5392 @VisibleForTesting 5393 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5394 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5395 return new NetworkMonitor(context, handler, nai, defaultRequest); 5396 } 5397 5398 @VisibleForTesting 5399 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5400 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5401 } 5402 5403 private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5404 int newNetid = NETID_UNSET; 5405 int prevNetid = NETID_UNSET; 5406 int[] transports = new int[0]; 5407 boolean hadIPv4 = false; 5408 boolean hadIPv6 = false; 5409 5410 if (newNai != null) { 5411 newNetid = newNai.network.netId; 5412 transports = newNai.networkCapabilities.getTransportTypes(); 5413 } 5414 if (prevNai != null) { 5415 prevNetid = prevNai.network.netId; 5416 final LinkProperties lp = prevNai.linkProperties; 5417 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5418 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5419 } 5420 5421 mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); 5422 } 5423 5424 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5425 mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); 5426 } 5427} 5428