ConnectivityService.java revision d660913b0bd49c0be94f2282641e31ae8a43b056
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_FOREGROUND; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 31import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 32import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 33import static android.net.NetworkPolicyManager.RULE_ALLOW_METERED; 34import static android.net.NetworkPolicyManager.RULE_NONE; 35import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 36import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 37import static android.net.NetworkPolicyManager.RULE_TEMPORARY_ALLOW_METERED; 38import static android.net.NetworkPolicyManager.uidRulesToString; 39 40import android.annotation.Nullable; 41import android.app.BroadcastOptions; 42import android.app.NotificationManager; 43import android.app.PendingIntent; 44import android.content.BroadcastReceiver; 45import android.content.ContentResolver; 46import android.content.Context; 47import android.content.Intent; 48import android.content.IntentFilter; 49import android.content.pm.PackageManager; 50import android.content.res.Configuration; 51import android.content.res.Resources; 52import android.database.ContentObserver; 53import android.net.ConnectivityManager; 54import android.net.ConnectivityManager.PacketKeepalive; 55import android.net.IConnectivityManager; 56import android.net.INetworkManagementEventObserver; 57import android.net.INetworkPolicyListener; 58import android.net.INetworkPolicyManager; 59import android.net.INetworkStatsService; 60import android.net.LinkProperties; 61import android.net.LinkProperties.CompareResult; 62import android.net.Network; 63import android.net.NetworkAgent; 64import android.net.NetworkCapabilities; 65import android.net.NetworkConfig; 66import android.net.NetworkInfo; 67import android.net.NetworkInfo.DetailedState; 68import android.net.NetworkMisc; 69import android.net.NetworkQuotaInfo; 70import android.net.NetworkRequest; 71import android.net.NetworkState; 72import android.net.NetworkUtils; 73import android.net.Proxy; 74import android.net.ProxyInfo; 75import android.net.RouteInfo; 76import android.net.UidRange; 77import android.net.Uri; 78import android.net.metrics.DefaultNetworkEvent; 79import android.net.metrics.IpConnectivityLog; 80import android.net.metrics.NetworkEvent; 81import android.os.Binder; 82import android.os.Build; 83import android.os.Bundle; 84import android.os.FileUtils; 85import android.os.Handler; 86import android.os.HandlerThread; 87import android.os.IBinder; 88import android.os.INetworkManagementService; 89import android.os.Looper; 90import android.os.Message; 91import android.os.Messenger; 92import android.os.ParcelFileDescriptor; 93import android.os.PowerManager; 94import android.os.Process; 95import android.os.RemoteException; 96import android.os.ResultReceiver; 97import android.os.SystemClock; 98import android.os.SystemProperties; 99import android.os.UserHandle; 100import android.os.UserManager; 101import android.provider.Settings; 102import android.security.Credentials; 103import android.security.KeyStore; 104import android.telephony.TelephonyManager; 105import android.text.TextUtils; 106import android.util.ArraySet; 107import android.util.LocalLog; 108import android.util.LocalLog.ReadOnlyLocalLog; 109import android.util.Log; 110import android.util.Pair; 111import android.util.Slog; 112import android.util.SparseArray; 113import android.util.SparseBooleanArray; 114import android.util.SparseIntArray; 115import android.util.Xml; 116 117import com.android.internal.R; 118import com.android.internal.annotations.GuardedBy; 119import com.android.internal.annotations.VisibleForTesting; 120import com.android.internal.app.IBatteryStats; 121import com.android.internal.net.LegacyVpnInfo; 122import com.android.internal.net.NetworkStatsFactory; 123import com.android.internal.net.VpnConfig; 124import com.android.internal.net.VpnInfo; 125import com.android.internal.net.VpnProfile; 126import com.android.internal.util.AsyncChannel; 127import com.android.internal.util.IndentingPrintWriter; 128import com.android.internal.util.MessageUtils; 129import com.android.internal.util.WakeupMessage; 130import com.android.internal.util.XmlUtils; 131import com.android.server.am.BatteryStatsService; 132import com.android.server.connectivity.DataConnectionStats; 133import com.android.server.connectivity.KeepaliveTracker; 134import com.android.server.connectivity.Nat464Xlat; 135import com.android.server.connectivity.LingerMonitor; 136import com.android.server.connectivity.NetworkAgentInfo; 137import com.android.server.connectivity.NetworkDiagnostics; 138import com.android.server.connectivity.NetworkMonitor; 139import com.android.server.connectivity.NetworkNotificationManager; 140import com.android.server.connectivity.NetworkNotificationManager.NotificationType; 141import com.android.server.connectivity.PacManager; 142import com.android.server.connectivity.PermissionMonitor; 143import com.android.server.connectivity.Tethering; 144import com.android.server.connectivity.Vpn; 145import com.android.server.net.BaseNetworkObserver; 146import com.android.server.net.LockdownVpnTracker; 147 148import com.google.android.collect.Lists; 149 150import org.xmlpull.v1.XmlPullParser; 151import org.xmlpull.v1.XmlPullParserException; 152 153import java.io.File; 154import java.io.FileDescriptor; 155import java.io.FileNotFoundException; 156import java.io.FileReader; 157import java.io.IOException; 158import java.io.PrintWriter; 159import java.net.Inet4Address; 160import java.net.InetAddress; 161import java.net.UnknownHostException; 162import java.util.ArrayDeque; 163import java.util.ArrayList; 164import java.util.Arrays; 165import java.util.Collection; 166import java.util.HashMap; 167import java.util.HashSet; 168import java.util.List; 169import java.util.Map; 170import java.util.Objects; 171import java.util.SortedSet; 172import java.util.TreeSet; 173 174/** 175 * @hide 176 */ 177public class ConnectivityService extends IConnectivityManager.Stub 178 implements PendingIntent.OnFinished { 179 private static final String TAG = ConnectivityService.class.getSimpleName(); 180 181 private static final boolean DBG = true; 182 private static final boolean VDBG = false; 183 184 private static final boolean LOGD_RULES = false; 185 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 186 187 // TODO: create better separation between radio types and network types 188 189 // how long to wait before switching back to a radio's default network 190 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 191 // system property that can override the above value 192 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 193 "android.telephony.apn-restore"; 194 195 // How long to wait before putting up a "This network doesn't have an Internet connection, 196 // connect anyway?" dialog after the user selects a network that doesn't validate. 197 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 198 199 // Default to 30s linger time-out. Modifiable only for testing. 200 private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; 201 private static final int DEFAULT_LINGER_DELAY_MS = 30_000; 202 @VisibleForTesting 203 protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it. 204 205 // How long to delay to removal of a pending intent based request. 206 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 207 private final int mReleasePendingIntentDelayMs; 208 209 private Tethering mTethering; 210 211 private final PermissionMonitor mPermissionMonitor; 212 213 private KeyStore mKeyStore; 214 215 @GuardedBy("mVpns") 216 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 217 218 private boolean mLockdownEnabled; 219 private LockdownVpnTracker mLockdownTracker; 220 221 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 222 private Object mRulesLock = new Object(); 223 /** Currently active network rules by UID. */ 224 @GuardedBy("mRulesLock") 225 private SparseIntArray mUidRules = new SparseIntArray(); 226 /** Set of ifaces that are costly. */ 227 @GuardedBy("mRulesLock") 228 private ArraySet<String> mMeteredIfaces = new ArraySet<>(); 229 /** Flag indicating if background data is restricted. */ 230 @GuardedBy("mRulesLock") 231 private boolean mRestrictBackground; 232 233 final private Context mContext; 234 private int mNetworkPreference; 235 // 0 is full bad, 100 is full good 236 private int mDefaultInetConditionPublished = 0; 237 238 private int mNumDnsEntries; 239 240 private boolean mTestMode; 241 private static ConnectivityService sServiceInstance; 242 243 private INetworkManagementService mNetd; 244 private INetworkStatsService mStatsService; 245 private INetworkPolicyManager mPolicyManager; 246 247 private String mCurrentTcpBufferSizes; 248 249 private static final int ENABLED = 1; 250 private static final int DISABLED = 0; 251 252 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 253 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class, 254 NetworkAgentInfo.class }); 255 256 private enum ReapUnvalidatedNetworks { 257 // Tear down networks that have no chance (e.g. even if validated) of becoming 258 // the highest scoring network satisfying a NetworkRequest. This should be passed when 259 // all networks have been rematched against all NetworkRequests. 260 REAP, 261 // Don't reap networks. This should be passed when some networks have not yet been 262 // rematched against all NetworkRequests. 263 DONT_REAP 264 }; 265 266 private enum UnneededFor { 267 LINGER, // Determine whether this network is unneeded and should be lingered. 268 TEARDOWN, // Determine whether this network is unneeded and should be torn down. 269 } 270 271 /** 272 * used internally to change our mobile data enabled flag 273 */ 274 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 275 276 /** 277 * used internally to clear a wakelock when transitioning 278 * from one net to another. Clear happens when we get a new 279 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 280 * after a timeout if no network is found (typically 1 min). 281 */ 282 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 283 284 /** 285 * used internally to reload global proxy settings 286 */ 287 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 288 289 /** 290 * PAC manager has received new port. 291 */ 292 private static final int EVENT_PROXY_HAS_CHANGED = 16; 293 294 /** 295 * used internally when registering NetworkFactories 296 * obj = NetworkFactoryInfo 297 */ 298 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 299 300 /** 301 * used internally when registering NetworkAgents 302 * obj = Messenger 303 */ 304 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 305 306 /** 307 * used to add a network request 308 * includes a NetworkRequestInfo 309 */ 310 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 311 312 /** 313 * indicates a timeout period is over - check if we had a network yet or not 314 * and if not, call the timeout callback (but leave the request live until they 315 * cancel it. 316 * includes a NetworkRequestInfo 317 */ 318 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 319 320 /** 321 * used to add a network listener - no request 322 * includes a NetworkRequestInfo 323 */ 324 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 325 326 /** 327 * used to remove a network request, either a listener or a real request 328 * arg1 = UID of caller 329 * obj = NetworkRequest 330 */ 331 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 332 333 /** 334 * used internally when registering NetworkFactories 335 * obj = Messenger 336 */ 337 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 338 339 /** 340 * used internally to expire a wakelock when transitioning 341 * from one net to another. Expire happens when we fail to find 342 * a new network (typically after 1 minute) - 343 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 344 * a replacement network. 345 */ 346 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 347 348 /** 349 * Used internally to indicate the system is ready. 350 */ 351 private static final int EVENT_SYSTEM_READY = 25; 352 353 /** 354 * used to add a network request with a pending intent 355 * obj = NetworkRequestInfo 356 */ 357 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 358 359 /** 360 * used to remove a pending intent and its associated network request. 361 * arg1 = UID of caller 362 * obj = PendingIntent 363 */ 364 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 365 366 /** 367 * used to specify whether a network should be used even if unvalidated. 368 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 369 * arg2 = whether to remember this choice in the future (1 or 0) 370 * obj = network 371 */ 372 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 373 374 /** 375 * used to ask the user to confirm a connection to an unvalidated network. 376 * obj = network 377 */ 378 private static final int EVENT_PROMPT_UNVALIDATED = 29; 379 380 /** 381 * used internally to (re)configure mobile data always-on settings. 382 */ 383 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 384 385 /** 386 * used to add a network listener with a pending intent 387 * obj = NetworkRequestInfo 388 */ 389 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 390 391 /** 392 * Indicates a caller has requested to have its callback invoked with 393 * the latest LinkProperties or NetworkCapabilities. 394 * 395 * arg1 = UID of caller 396 * obj = NetworkRequest 397 */ 398 private static final int EVENT_REQUEST_LINKPROPERTIES = 32; 399 private static final int EVENT_REQUEST_NETCAPABILITIES = 33; 400 401 /** 402 * Used internally to (re)configure avoid bad wifi setting. 403 */ 404 private static final int EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI = 34; 405 406 /** Handler thread used for both of the handlers below. */ 407 @VisibleForTesting 408 protected final HandlerThread mHandlerThread; 409 /** Handler used for internal events. */ 410 final private InternalHandler mHandler; 411 /** Handler used for incoming {@link NetworkStateTracker} events. */ 412 final private NetworkStateTrackerHandler mTrackerHandler; 413 414 private boolean mSystemReady; 415 private Intent mInitialBroadcast; 416 417 private PowerManager.WakeLock mNetTransitionWakeLock; 418 private String mNetTransitionWakeLockCausedBy = ""; 419 private int mNetTransitionWakeLockSerialNumber; 420 private int mNetTransitionWakeLockTimeout; 421 private final PowerManager.WakeLock mPendingIntentWakeLock; 422 423 // used in DBG mode to track inet condition reports 424 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 425 private ArrayList mInetLog; 426 427 // track the current default http proxy - tell the world if we get a new one (real change) 428 private volatile ProxyInfo mDefaultProxy = null; 429 private Object mProxyLock = new Object(); 430 private boolean mDefaultProxyDisabled = false; 431 432 // track the global proxy. 433 private ProxyInfo mGlobalProxy = null; 434 435 private PacManager mPacManager = null; 436 437 final private SettingsObserver mSettingsObserver; 438 439 private UserManager mUserManager; 440 441 NetworkConfig[] mNetConfigs; 442 int mNetworksDefined; 443 444 // the set of network types that can only be enabled by system/sig apps 445 List mProtectedNetworks; 446 447 private DataConnectionStats mDataConnectionStats; 448 449 TelephonyManager mTelephonyManager; 450 451 private KeepaliveTracker mKeepaliveTracker; 452 private NetworkNotificationManager mNotifier; 453 private LingerMonitor mLingerMonitor; 454 455 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 456 private final static int MIN_NET_ID = 100; // some reserved marks 457 private final static int MAX_NET_ID = 65535; 458 private int mNextNetId = MIN_NET_ID; 459 460 // sequence number of NetworkRequests 461 private int mNextNetworkRequestId = 1; 462 463 // NetworkRequest activity String log entries. 464 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 465 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 466 467 // NetworkInfo blocked and unblocked String log entries 468 // TODO: consider reducing memory usage. Each log line is ~40 2B chars, for a total of ~8kB. 469 private static final int MAX_NETWORK_INFO_LOGS = 100; 470 private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); 471 472 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 473 private static final int MAX_VALIDATION_LOGS = 10; 474 private static class ValidationLog { 475 final Network mNetwork; 476 final String mNetworkExtraInfo; 477 final ReadOnlyLocalLog mLog; 478 479 ValidationLog(Network network, String networkExtraInfo, ReadOnlyLocalLog log) { 480 mNetwork = network; 481 mNetworkExtraInfo = networkExtraInfo; 482 mLog = log; 483 } 484 } 485 private final ArrayDeque<ValidationLog> mValidationLogs = 486 new ArrayDeque<ValidationLog>(MAX_VALIDATION_LOGS); 487 488 private void addValidationLogs(ReadOnlyLocalLog log, Network network, String networkExtraInfo) { 489 synchronized(mValidationLogs) { 490 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 491 mValidationLogs.removeLast(); 492 } 493 mValidationLogs.addFirst(new ValidationLog(network, networkExtraInfo, log)); 494 } 495 } 496 497 private final IpConnectivityLog mMetricsLog; 498 499 /** 500 * Implements support for the legacy "one network per network type" model. 501 * 502 * We used to have a static array of NetworkStateTrackers, one for each 503 * network type, but that doesn't work any more now that we can have, 504 * for example, more that one wifi network. This class stores all the 505 * NetworkAgentInfo objects that support a given type, but the legacy 506 * API will only see the first one. 507 * 508 * It serves two main purposes: 509 * 510 * 1. Provide information about "the network for a given type" (since this 511 * API only supports one). 512 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 513 * the first network for a given type changes, or if the default network 514 * changes. 515 */ 516 private class LegacyTypeTracker { 517 518 private static final boolean DBG = true; 519 private static final boolean VDBG = false; 520 521 /** 522 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 523 * Each list holds references to all NetworkAgentInfos that are used to 524 * satisfy requests for that network type. 525 * 526 * This array is built out at startup such that an unsupported network 527 * doesn't get an ArrayList instance, making this a tristate: 528 * unsupported, supported but not active and active. 529 * 530 * The actual lists are populated when we scan the network types that 531 * are supported on this device. 532 * 533 * Threading model: 534 * - addSupportedType() is only called in the constructor 535 * - add(), update(), remove() are only called from the ConnectivityService handler thread. 536 * They are therefore not thread-safe with respect to each other. 537 * - getNetworkForType() can be called at any time on binder threads. It is synchronized 538 * on mTypeLists to be thread-safe with respect to a concurrent remove call. 539 * - dump is thread-safe with respect to concurrent add and remove calls. 540 */ 541 private final ArrayList<NetworkAgentInfo> mTypeLists[]; 542 543 public LegacyTypeTracker() { 544 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 545 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 546 } 547 548 public void addSupportedType(int type) { 549 if (mTypeLists[type] != null) { 550 throw new IllegalStateException( 551 "legacy list for type " + type + "already initialized"); 552 } 553 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 554 } 555 556 public boolean isTypeSupported(int type) { 557 return isNetworkTypeValid(type) && mTypeLists[type] != null; 558 } 559 560 public NetworkAgentInfo getNetworkForType(int type) { 561 synchronized (mTypeLists) { 562 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 563 return mTypeLists[type].get(0); 564 } 565 } 566 return null; 567 } 568 569 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 570 boolean isDefaultNetwork) { 571 if (DBG) { 572 log("Sending " + state + 573 " broadcast for type " + type + " " + nai.name() + 574 " isDefaultNetwork=" + isDefaultNetwork); 575 } 576 } 577 578 /** Adds the given network to the specified legacy type list. */ 579 public void add(int type, NetworkAgentInfo nai) { 580 if (!isTypeSupported(type)) { 581 return; // Invalid network type. 582 } 583 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 584 585 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 586 if (list.contains(nai)) { 587 return; 588 } 589 synchronized (mTypeLists) { 590 list.add(nai); 591 } 592 593 // Send a broadcast if this is the first network of its type or if it's the default. 594 final boolean isDefaultNetwork = isDefaultNetwork(nai); 595 if ((list.size() == 1) || isDefaultNetwork) { 596 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 597 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 598 } 599 } 600 601 /** Removes the given network from the specified legacy type list. */ 602 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 603 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 604 if (list == null || list.isEmpty()) { 605 return; 606 } 607 final boolean wasFirstNetwork = list.get(0).equals(nai); 608 609 synchronized (mTypeLists) { 610 if (!list.remove(nai)) { 611 return; 612 } 613 } 614 615 final DetailedState state = DetailedState.DISCONNECTED; 616 617 if (wasFirstNetwork || wasDefault) { 618 maybeLogBroadcast(nai, state, type, wasDefault); 619 sendLegacyNetworkBroadcast(nai, state, type); 620 } 621 622 if (!list.isEmpty() && wasFirstNetwork) { 623 if (DBG) log("Other network available for type " + type + 624 ", sending connected broadcast"); 625 final NetworkAgentInfo replacement = list.get(0); 626 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 627 sendLegacyNetworkBroadcast(replacement, state, type); 628 } 629 } 630 631 /** Removes the given network from all legacy type lists. */ 632 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 633 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 634 for (int type = 0; type < mTypeLists.length; type++) { 635 remove(type, nai, wasDefault); 636 } 637 } 638 639 // send out another legacy broadcast - currently only used for suspend/unsuspend 640 // toggle 641 public void update(NetworkAgentInfo nai) { 642 final boolean isDefault = isDefaultNetwork(nai); 643 final DetailedState state = nai.networkInfo.getDetailedState(); 644 for (int type = 0; type < mTypeLists.length; type++) { 645 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 646 final boolean contains = (list != null && list.contains(nai)); 647 final boolean isFirst = contains && (nai == list.get(0)); 648 if (isFirst || contains && isDefault) { 649 maybeLogBroadcast(nai, state, type, isDefault); 650 sendLegacyNetworkBroadcast(nai, state, type); 651 } 652 } 653 } 654 655 private String naiToString(NetworkAgentInfo nai) { 656 String name = (nai != null) ? nai.name() : "null"; 657 String state = (nai.networkInfo != null) ? 658 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 659 "???/???"; 660 return name + " " + state; 661 } 662 663 public void dump(IndentingPrintWriter pw) { 664 pw.println("mLegacyTypeTracker:"); 665 pw.increaseIndent(); 666 pw.print("Supported types:"); 667 for (int type = 0; type < mTypeLists.length; type++) { 668 if (mTypeLists[type] != null) pw.print(" " + type); 669 } 670 pw.println(); 671 pw.println("Current state:"); 672 pw.increaseIndent(); 673 synchronized (mTypeLists) { 674 for (int type = 0; type < mTypeLists.length; type++) { 675 if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; 676 for (NetworkAgentInfo nai : mTypeLists[type]) { 677 pw.println(type + " " + naiToString(nai)); 678 } 679 } 680 } 681 pw.decreaseIndent(); 682 pw.decreaseIndent(); 683 pw.println(); 684 } 685 } 686 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 687 688 @VisibleForTesting 689 protected HandlerThread createHandlerThread() { 690 return new HandlerThread("ConnectivityServiceThread"); 691 } 692 693 public ConnectivityService(Context context, INetworkManagementService netManager, 694 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 695 this(context, netManager, statsService, policyManager, new IpConnectivityLog()); 696 } 697 698 @VisibleForTesting 699 protected ConnectivityService(Context context, INetworkManagementService netManager, 700 INetworkStatsService statsService, INetworkPolicyManager policyManager, 701 IpConnectivityLog logger) { 702 if (DBG) log("ConnectivityService starting up"); 703 704 mMetricsLog = logger; 705 mDefaultRequest = createInternetRequestForTransport(-1, NetworkRequest.Type.REQUEST); 706 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); 707 mNetworkRequests.put(mDefaultRequest, defaultNRI); 708 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 709 710 mDefaultMobileDataRequest = createInternetRequestForTransport( 711 NetworkCapabilities.TRANSPORT_CELLULAR, NetworkRequest.Type.BACKGROUND_REQUEST); 712 713 mHandlerThread = createHandlerThread(); 714 mHandlerThread.start(); 715 mHandler = new InternalHandler(mHandlerThread.getLooper()); 716 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 717 718 // setup our unique device name 719 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 720 String id = Settings.Secure.getString(context.getContentResolver(), 721 Settings.Secure.ANDROID_ID); 722 if (id != null && id.length() > 0) { 723 String name = new String("android-").concat(id); 724 SystemProperties.set("net.hostname", name); 725 } 726 } 727 728 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 729 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 730 731 mLingerDelayMs = SystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); 732 733 mContext = checkNotNull(context, "missing Context"); 734 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 735 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 736 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 737 mKeyStore = KeyStore.getInstance(); 738 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 739 740 try { 741 mPolicyManager.setConnectivityListener(mPolicyListener); 742 mRestrictBackground = mPolicyManager.getRestrictBackground(); 743 } catch (RemoteException e) { 744 // ouch, no rules updates means some processes may never get network 745 loge("unable to register INetworkPolicyListener" + e); 746 } 747 748 final PowerManager powerManager = (PowerManager) context.getSystemService( 749 Context.POWER_SERVICE); 750 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 751 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 752 com.android.internal.R.integer.config_networkTransitionTimeout); 753 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 754 755 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 756 757 // TODO: What is the "correct" way to do determine if this is a wifi only device? 758 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 759 log("wifiOnly=" + wifiOnly); 760 String[] naStrings = context.getResources().getStringArray( 761 com.android.internal.R.array.networkAttributes); 762 for (String naString : naStrings) { 763 try { 764 NetworkConfig n = new NetworkConfig(naString); 765 if (VDBG) log("naString=" + naString + " config=" + n); 766 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 767 loge("Error in networkAttributes - ignoring attempt to define type " + 768 n.type); 769 continue; 770 } 771 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 772 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 773 n.type); 774 continue; 775 } 776 if (mNetConfigs[n.type] != null) { 777 loge("Error in networkAttributes - ignoring attempt to redefine type " + 778 n.type); 779 continue; 780 } 781 mLegacyTypeTracker.addSupportedType(n.type); 782 783 mNetConfigs[n.type] = n; 784 mNetworksDefined++; 785 } catch(Exception e) { 786 // ignore it - leave the entry null 787 } 788 } 789 790 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 791 if (mNetConfigs[TYPE_VPN] == null) { 792 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 793 // don't need to add TYPE_VPN to mNetConfigs. 794 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 795 mNetworksDefined++; // used only in the log() statement below. 796 } 797 798 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 799 800 mProtectedNetworks = new ArrayList<Integer>(); 801 int[] protectedNetworks = context.getResources().getIntArray( 802 com.android.internal.R.array.config_protectedNetworks); 803 for (int p : protectedNetworks) { 804 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 805 mProtectedNetworks.add(p); 806 } else { 807 if (DBG) loge("Ignoring protectedNetwork " + p); 808 } 809 } 810 811 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 812 && SystemProperties.get("ro.build.type").equals("eng"); 813 814 mTethering = new Tethering(mContext, mNetd, statsService); 815 816 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 817 818 //set up the listener for user state for creating user VPNs 819 IntentFilter intentFilter = new IntentFilter(); 820 intentFilter.addAction(Intent.ACTION_USER_STARTED); 821 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 822 intentFilter.addAction(Intent.ACTION_USER_ADDED); 823 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 824 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 825 mContext.registerReceiverAsUser( 826 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 827 828 try { 829 mNetd.registerObserver(mTethering); 830 mNetd.registerObserver(mDataActivityObserver); 831 } catch (RemoteException e) { 832 loge("Error registering observer :" + e); 833 } 834 835 if (DBG) { 836 mInetLog = new ArrayList(); 837 } 838 839 mSettingsObserver = new SettingsObserver(mContext, mHandler); 840 registerSettingsCallbacks(); 841 842 mDataConnectionStats = new DataConnectionStats(mContext); 843 mDataConnectionStats.startMonitoring(); 844 845 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 846 847 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 848 849 mKeepaliveTracker = new KeepaliveTracker(mHandler); 850 mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager, 851 mContext.getSystemService(NotificationManager.class)); 852 853 final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(), 854 Settings.Global.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT, 855 LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT); 856 final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(), 857 Settings.Global.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS, 858 LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS); 859 mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit); 860 } 861 862 private NetworkRequest createInternetRequestForTransport( 863 int transportType, NetworkRequest.Type type) { 864 NetworkCapabilities netCap = new NetworkCapabilities(); 865 netCap.addCapability(NET_CAPABILITY_INTERNET); 866 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 867 if (transportType > -1) { 868 netCap.addTransportType(transportType); 869 } 870 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type); 871 } 872 873 // Used only for testing. 874 // TODO: Delete this and either: 875 // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires 876 // changing ContentResolver to make registerContentObserver non-final). 877 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 878 // by subclassing SettingsObserver. 879 @VisibleForTesting 880 void updateMobileDataAlwaysOn() { 881 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 882 } 883 884 private void handleMobileDataAlwaysOn() { 885 final boolean enable = (Settings.Global.getInt( 886 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 887 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 888 if (enable == isEnabled) { 889 return; // Nothing to do. 890 } 891 892 if (enable) { 893 handleRegisterNetworkRequest(new NetworkRequestInfo( 894 null, mDefaultMobileDataRequest, new Binder())); 895 } else { 896 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 897 } 898 } 899 900 private void registerSettingsCallbacks() { 901 // Watch for global HTTP proxy changes. 902 mSettingsObserver.observe( 903 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 904 EVENT_APPLY_GLOBAL_HTTP_PROXY); 905 906 // Watch for whether or not to keep mobile data always on. 907 mSettingsObserver.observe( 908 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 909 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 910 911 // Watch for whether to automatically switch away from wifi networks that lose Internet 912 // access. 913 mSettingsObserver.observe( 914 Settings.Global.getUriFor(Settings.Global.NETWORK_AVOID_BAD_WIFI), 915 EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI); 916 } 917 918 private synchronized int nextNetworkRequestId() { 919 return mNextNetworkRequestId++; 920 } 921 922 @VisibleForTesting 923 protected int reserveNetId() { 924 synchronized (mNetworkForNetId) { 925 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 926 int netId = mNextNetId; 927 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 928 // Make sure NetID unused. http://b/16815182 929 if (!mNetIdInUse.get(netId)) { 930 mNetIdInUse.put(netId, true); 931 return netId; 932 } 933 } 934 } 935 throw new IllegalStateException("No free netIds"); 936 } 937 938 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 939 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 940 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 941 final NetworkState state; 942 if (nai != null) { 943 state = nai.getNetworkState(); 944 state.networkInfo.setType(networkType); 945 } else { 946 final NetworkInfo info = new NetworkInfo(networkType, 0, 947 getNetworkTypeName(networkType), ""); 948 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 949 info.setIsAvailable(true); 950 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 951 null, null, null); 952 } 953 filterNetworkStateForUid(state, uid, ignoreBlocked); 954 return state; 955 } else { 956 return NetworkState.EMPTY; 957 } 958 } 959 960 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 961 if (network == null) { 962 return null; 963 } 964 synchronized (mNetworkForNetId) { 965 return mNetworkForNetId.get(network.netId); 966 } 967 } 968 969 private Network[] getVpnUnderlyingNetworks(int uid) { 970 if (!mLockdownEnabled) { 971 int user = UserHandle.getUserId(uid); 972 synchronized (mVpns) { 973 Vpn vpn = mVpns.get(user); 974 if (vpn != null && vpn.appliesToUid(uid)) { 975 return vpn.getUnderlyingNetworks(); 976 } 977 } 978 } 979 return null; 980 } 981 982 private NetworkState getUnfilteredActiveNetworkState(int uid) { 983 NetworkAgentInfo nai = getDefaultNetwork(); 984 985 final Network[] networks = getVpnUnderlyingNetworks(uid); 986 if (networks != null) { 987 // getUnderlyingNetworks() returns: 988 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 989 // empty array => the VPN explicitly said "no default network". 990 // non-empty array => the VPN specified one or more default networks; we use the 991 // first one. 992 if (networks.length > 0) { 993 nai = getNetworkAgentInfoForNetwork(networks[0]); 994 } else { 995 nai = null; 996 } 997 } 998 999 if (nai != null) { 1000 return nai.getNetworkState(); 1001 } else { 1002 return NetworkState.EMPTY; 1003 } 1004 } 1005 1006 /** 1007 * Check if UID should be blocked from using the network with the given LinkProperties. 1008 */ 1009 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 1010 boolean ignoreBlocked) { 1011 // Networks aren't blocked when ignoring blocked status 1012 if (ignoreBlocked) return false; 1013 // Networks are never blocked for system services 1014 if (isSystem(uid)) return false; 1015 1016 final boolean networkMetered; 1017 final int uidRules; 1018 1019 synchronized (mVpns) { 1020 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 1021 if (vpn != null && vpn.isBlockingUid(uid)) { 1022 return true; 1023 } 1024 } 1025 1026 final String iface = (lp == null ? "" : lp.getInterfaceName()); 1027 synchronized (mRulesLock) { 1028 networkMetered = mMeteredIfaces.contains(iface); 1029 uidRules = mUidRules.get(uid, RULE_NONE); 1030 } 1031 1032 boolean allowed = true; 1033 // Check Data Saver Mode first... 1034 if (networkMetered) { 1035 if ((uidRules & RULE_REJECT_METERED) != 0) { 1036 if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); 1037 // Explicitly blacklisted. 1038 allowed = false; 1039 } else { 1040 allowed = !mRestrictBackground 1041 || (uidRules & RULE_ALLOW_METERED) != 0 1042 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; 1043 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1044 + " mRestrictBackground=" + mRestrictBackground 1045 + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) 1046 + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" 1047 + ": " + allowed); 1048 } 1049 } 1050 // ...then power restrictions. 1051 if (allowed) { 1052 allowed = (uidRules & RULE_REJECT_ALL) == 0; 1053 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1054 + " rule is " + uidRulesToString(uidRules) + ": " + allowed); 1055 } 1056 return !allowed; 1057 } 1058 1059 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1060 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1061 return; 1062 } 1063 boolean removed = false; 1064 boolean added = false; 1065 synchronized (mBlockedAppUids) { 1066 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1067 added = true; 1068 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1069 removed = true; 1070 } 1071 } 1072 if (added) { 1073 log("Returning blocked NetworkInfo to uid=" + uid); 1074 mNetworkInfoBlockingLogs.log("BLOCKED " + uid); 1075 } else if (removed) { 1076 log("Returning unblocked NetworkInfo to uid=" + uid); 1077 mNetworkInfoBlockingLogs.log("UNBLOCKED " + uid); 1078 } 1079 } 1080 1081 /** 1082 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1083 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1084 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 1085 * {@link NetworkInfo#isMetered()} based on network policies. 1086 */ 1087 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1088 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1089 1090 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1091 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1092 } 1093 if (mLockdownTracker != null) { 1094 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1095 } 1096 1097 // TODO: apply metered state closer to NetworkAgentInfo 1098 final long token = Binder.clearCallingIdentity(); 1099 try { 1100 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 1101 } catch (RemoteException e) { 1102 } finally { 1103 Binder.restoreCallingIdentity(token); 1104 } 1105 } 1106 1107 /** 1108 * Return NetworkInfo for the active (i.e., connected) network interface. 1109 * It is assumed that at most one network is active at a time. If more 1110 * than one is active, it is indeterminate which will be returned. 1111 * @return the info for the active network, or {@code null} if none is 1112 * active 1113 */ 1114 @Override 1115 public NetworkInfo getActiveNetworkInfo() { 1116 enforceAccessPermission(); 1117 final int uid = Binder.getCallingUid(); 1118 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1119 filterNetworkStateForUid(state, uid, false); 1120 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1121 return state.networkInfo; 1122 } 1123 1124 @Override 1125 public Network getActiveNetwork() { 1126 enforceAccessPermission(); 1127 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1128 } 1129 1130 @Override 1131 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1132 enforceConnectivityInternalPermission(); 1133 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1134 } 1135 1136 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1137 final int user = UserHandle.getUserId(uid); 1138 int vpnNetId = NETID_UNSET; 1139 synchronized (mVpns) { 1140 final Vpn vpn = mVpns.get(user); 1141 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1142 } 1143 NetworkAgentInfo nai; 1144 if (vpnNetId != NETID_UNSET) { 1145 synchronized (mNetworkForNetId) { 1146 nai = mNetworkForNetId.get(vpnNetId); 1147 } 1148 if (nai != null) return nai.network; 1149 } 1150 nai = getDefaultNetwork(); 1151 if (nai != null 1152 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1153 nai = null; 1154 } 1155 return nai != null ? nai.network : null; 1156 } 1157 1158 // Public because it's used by mLockdownTracker. 1159 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1160 enforceAccessPermission(); 1161 final int uid = Binder.getCallingUid(); 1162 NetworkState state = getUnfilteredActiveNetworkState(uid); 1163 return state.networkInfo; 1164 } 1165 1166 @Override 1167 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1168 enforceConnectivityInternalPermission(); 1169 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1170 filterNetworkStateForUid(state, uid, ignoreBlocked); 1171 return state.networkInfo; 1172 } 1173 1174 @Override 1175 public NetworkInfo getNetworkInfo(int networkType) { 1176 enforceAccessPermission(); 1177 final int uid = Binder.getCallingUid(); 1178 if (getVpnUnderlyingNetworks(uid) != null) { 1179 // A VPN is active, so we may need to return one of its underlying networks. This 1180 // information is not available in LegacyTypeTracker, so we have to get it from 1181 // getUnfilteredActiveNetworkState. 1182 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1183 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1184 filterNetworkStateForUid(state, uid, false); 1185 return state.networkInfo; 1186 } 1187 } 1188 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1189 return state.networkInfo; 1190 } 1191 1192 @Override 1193 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1194 enforceAccessPermission(); 1195 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1196 if (nai != null) { 1197 final NetworkState state = nai.getNetworkState(); 1198 filterNetworkStateForUid(state, uid, ignoreBlocked); 1199 return state.networkInfo; 1200 } else { 1201 return null; 1202 } 1203 } 1204 1205 @Override 1206 public NetworkInfo[] getAllNetworkInfo() { 1207 enforceAccessPermission(); 1208 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1209 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1210 networkType++) { 1211 NetworkInfo info = getNetworkInfo(networkType); 1212 if (info != null) { 1213 result.add(info); 1214 } 1215 } 1216 return result.toArray(new NetworkInfo[result.size()]); 1217 } 1218 1219 @Override 1220 public Network getNetworkForType(int networkType) { 1221 enforceAccessPermission(); 1222 final int uid = Binder.getCallingUid(); 1223 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1224 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1225 return state.network; 1226 } 1227 return null; 1228 } 1229 1230 @Override 1231 public Network[] getAllNetworks() { 1232 enforceAccessPermission(); 1233 synchronized (mNetworkForNetId) { 1234 final Network[] result = new Network[mNetworkForNetId.size()]; 1235 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1236 result[i] = mNetworkForNetId.valueAt(i).network; 1237 } 1238 return result; 1239 } 1240 } 1241 1242 @Override 1243 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1244 // The basic principle is: if an app's traffic could possibly go over a 1245 // network, without the app doing anything multinetwork-specific, 1246 // (hence, by "default"), then include that network's capabilities in 1247 // the array. 1248 // 1249 // In the normal case, app traffic only goes over the system's default 1250 // network connection, so that's the only network returned. 1251 // 1252 // With a VPN in force, some app traffic may go into the VPN, and thus 1253 // over whatever underlying networks the VPN specifies, while other app 1254 // traffic may go over the system default network (e.g.: a split-tunnel 1255 // VPN, or an app disallowed by the VPN), so the set of networks 1256 // returned includes the VPN's underlying networks and the system 1257 // default. 1258 enforceAccessPermission(); 1259 1260 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1261 1262 NetworkAgentInfo nai = getDefaultNetwork(); 1263 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1264 if (nc != null) { 1265 result.put(nai.network, nc); 1266 } 1267 1268 if (!mLockdownEnabled) { 1269 synchronized (mVpns) { 1270 Vpn vpn = mVpns.get(userId); 1271 if (vpn != null) { 1272 Network[] networks = vpn.getUnderlyingNetworks(); 1273 if (networks != null) { 1274 for (Network network : networks) { 1275 nai = getNetworkAgentInfoForNetwork(network); 1276 nc = getNetworkCapabilitiesInternal(nai); 1277 if (nc != null) { 1278 result.put(network, nc); 1279 } 1280 } 1281 } 1282 } 1283 } 1284 } 1285 1286 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1287 out = result.values().toArray(out); 1288 return out; 1289 } 1290 1291 @Override 1292 public boolean isNetworkSupported(int networkType) { 1293 enforceAccessPermission(); 1294 return mLegacyTypeTracker.isTypeSupported(networkType); 1295 } 1296 1297 /** 1298 * Return LinkProperties for the active (i.e., connected) default 1299 * network interface. It is assumed that at most one default network 1300 * is active at a time. If more than one is active, it is indeterminate 1301 * which will be returned. 1302 * @return the ip properties for the active network, or {@code null} if 1303 * none is active 1304 */ 1305 @Override 1306 public LinkProperties getActiveLinkProperties() { 1307 enforceAccessPermission(); 1308 final int uid = Binder.getCallingUid(); 1309 NetworkState state = getUnfilteredActiveNetworkState(uid); 1310 return state.linkProperties; 1311 } 1312 1313 @Override 1314 public LinkProperties getLinkPropertiesForType(int networkType) { 1315 enforceAccessPermission(); 1316 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1317 if (nai != null) { 1318 synchronized (nai) { 1319 return new LinkProperties(nai.linkProperties); 1320 } 1321 } 1322 return null; 1323 } 1324 1325 // TODO - this should be ALL networks 1326 @Override 1327 public LinkProperties getLinkProperties(Network network) { 1328 enforceAccessPermission(); 1329 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1330 if (nai != null) { 1331 synchronized (nai) { 1332 return new LinkProperties(nai.linkProperties); 1333 } 1334 } 1335 return null; 1336 } 1337 1338 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1339 if (nai != null) { 1340 synchronized (nai) { 1341 if (nai.networkCapabilities != null) { 1342 return new NetworkCapabilities(nai.networkCapabilities); 1343 } 1344 } 1345 } 1346 return null; 1347 } 1348 1349 @Override 1350 public NetworkCapabilities getNetworkCapabilities(Network network) { 1351 enforceAccessPermission(); 1352 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1353 } 1354 1355 @Override 1356 public NetworkState[] getAllNetworkState() { 1357 // Require internal since we're handing out IMSI details 1358 enforceConnectivityInternalPermission(); 1359 1360 final ArrayList<NetworkState> result = Lists.newArrayList(); 1361 for (Network network : getAllNetworks()) { 1362 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1363 if (nai != null) { 1364 result.add(nai.getNetworkState()); 1365 } 1366 } 1367 return result.toArray(new NetworkState[result.size()]); 1368 } 1369 1370 @Override 1371 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1372 enforceAccessPermission(); 1373 final int uid = Binder.getCallingUid(); 1374 final long token = Binder.clearCallingIdentity(); 1375 try { 1376 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1377 if (state.networkInfo != null) { 1378 try { 1379 return mPolicyManager.getNetworkQuotaInfo(state); 1380 } catch (RemoteException e) { 1381 } 1382 } 1383 return null; 1384 } finally { 1385 Binder.restoreCallingIdentity(token); 1386 } 1387 } 1388 1389 @Override 1390 public boolean isActiveNetworkMetered() { 1391 enforceAccessPermission(); 1392 1393 final NetworkInfo info = getActiveNetworkInfo(); 1394 return (info != null) ? info.isMetered() : false; 1395 } 1396 1397 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1398 @Override 1399 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1400 int deviceType = Integer.parseInt(label); 1401 sendDataActivityBroadcast(deviceType, active, tsNanos); 1402 } 1403 }; 1404 1405 /** 1406 * Ensure that a network route exists to deliver traffic to the specified 1407 * host via the specified network interface. 1408 * @param networkType the type of the network over which traffic to the 1409 * specified host is to be routed 1410 * @param hostAddress the IP address of the host to which the route is 1411 * desired 1412 * @return {@code true} on success, {@code false} on failure 1413 */ 1414 @Override 1415 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1416 enforceChangePermission(); 1417 if (mProtectedNetworks.contains(networkType)) { 1418 enforceConnectivityInternalPermission(); 1419 } 1420 1421 InetAddress addr; 1422 try { 1423 addr = InetAddress.getByAddress(hostAddress); 1424 } catch (UnknownHostException e) { 1425 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1426 return false; 1427 } 1428 1429 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1430 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1431 return false; 1432 } 1433 1434 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1435 if (nai == null) { 1436 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1437 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1438 } else { 1439 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1440 } 1441 return false; 1442 } 1443 1444 DetailedState netState; 1445 synchronized (nai) { 1446 netState = nai.networkInfo.getDetailedState(); 1447 } 1448 1449 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1450 if (VDBG) { 1451 log("requestRouteToHostAddress on down network " 1452 + "(" + networkType + ") - dropped" 1453 + " netState=" + netState); 1454 } 1455 return false; 1456 } 1457 1458 final int uid = Binder.getCallingUid(); 1459 final long token = Binder.clearCallingIdentity(); 1460 try { 1461 LinkProperties lp; 1462 int netId; 1463 synchronized (nai) { 1464 lp = nai.linkProperties; 1465 netId = nai.network.netId; 1466 } 1467 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1468 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1469 return ok; 1470 } finally { 1471 Binder.restoreCallingIdentity(token); 1472 } 1473 } 1474 1475 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1476 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1477 if (bestRoute == null) { 1478 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1479 } else { 1480 String iface = bestRoute.getInterface(); 1481 if (bestRoute.getGateway().equals(addr)) { 1482 // if there is no better route, add the implied hostroute for our gateway 1483 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1484 } else { 1485 // if we will connect to this through another route, add a direct route 1486 // to it's gateway 1487 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1488 } 1489 } 1490 if (DBG) log("Adding legacy route " + bestRoute + 1491 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1492 try { 1493 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1494 } catch (Exception e) { 1495 // never crash - catch them all 1496 if (DBG) loge("Exception trying to add a route: " + e); 1497 return false; 1498 } 1499 return true; 1500 } 1501 1502 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1503 @Override 1504 public void onUidRulesChanged(int uid, int uidRules) { 1505 // caller is NPMS, since we only register with them 1506 if (LOGD_RULES) { 1507 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1508 } 1509 1510 synchronized (mRulesLock) { 1511 // skip update when we've already applied rules 1512 final int oldRules = mUidRules.get(uid, RULE_NONE); 1513 if (oldRules == uidRules) return; 1514 1515 if (uidRules == RULE_NONE) { 1516 mUidRules.delete(uid); 1517 } else { 1518 mUidRules.put(uid, uidRules); 1519 } 1520 } 1521 1522 // TODO: notify UID when it has requested targeted updates 1523 } 1524 1525 @Override 1526 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1527 // caller is NPMS, since we only register with them 1528 if (LOGD_RULES) { 1529 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1530 } 1531 1532 synchronized (mRulesLock) { 1533 mMeteredIfaces.clear(); 1534 for (String iface : meteredIfaces) { 1535 mMeteredIfaces.add(iface); 1536 } 1537 } 1538 } 1539 1540 @Override 1541 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1542 // caller is NPMS, since we only register with them 1543 if (LOGD_RULES) { 1544 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1545 } 1546 1547 synchronized (mRulesLock) { 1548 mRestrictBackground = restrictBackground; 1549 } 1550 1551 if (restrictBackground) { 1552 log("onRestrictBackgroundChanged(true): disabling tethering"); 1553 mTethering.untetherAll(); 1554 } 1555 } 1556 1557 @Override 1558 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1559 if (LOGD_RULES) { 1560 // caller is NPMS, since we only register with them 1561 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1562 + whitelisted + ")"); 1563 } 1564 } 1565 @Override 1566 public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { 1567 if (LOGD_RULES) { 1568 // caller is NPMS, since we only register with them 1569 log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" 1570 + blacklisted + ")"); 1571 } 1572 } 1573 }; 1574 1575 /** 1576 * Require that the caller is either in the same user or has appropriate permission to interact 1577 * across users. 1578 * 1579 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1580 */ 1581 private void enforceCrossUserPermission(int userId) { 1582 if (userId == UserHandle.getCallingUserId()) { 1583 // Not a cross-user call. 1584 return; 1585 } 1586 mContext.enforceCallingOrSelfPermission( 1587 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1588 "ConnectivityService"); 1589 } 1590 1591 private void enforceInternetPermission() { 1592 mContext.enforceCallingOrSelfPermission( 1593 android.Manifest.permission.INTERNET, 1594 "ConnectivityService"); 1595 } 1596 1597 private void enforceAccessPermission() { 1598 mContext.enforceCallingOrSelfPermission( 1599 android.Manifest.permission.ACCESS_NETWORK_STATE, 1600 "ConnectivityService"); 1601 } 1602 1603 private void enforceChangePermission() { 1604 ConnectivityManager.enforceChangePermission(mContext); 1605 } 1606 1607 private void enforceTetherAccessPermission() { 1608 mContext.enforceCallingOrSelfPermission( 1609 android.Manifest.permission.ACCESS_NETWORK_STATE, 1610 "ConnectivityService"); 1611 } 1612 1613 private void enforceConnectivityInternalPermission() { 1614 mContext.enforceCallingOrSelfPermission( 1615 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1616 "ConnectivityService"); 1617 } 1618 1619 private void enforceConnectivityRestrictedNetworksPermission() { 1620 try { 1621 mContext.enforceCallingOrSelfPermission( 1622 android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, 1623 "ConnectivityService"); 1624 return; 1625 } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } 1626 enforceConnectivityInternalPermission(); 1627 } 1628 1629 private void enforceKeepalivePermission() { 1630 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1631 } 1632 1633 // Public because it's used by mLockdownTracker. 1634 public void sendConnectedBroadcast(NetworkInfo info) { 1635 enforceConnectivityInternalPermission(); 1636 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1637 } 1638 1639 private void sendInetConditionBroadcast(NetworkInfo info) { 1640 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1641 } 1642 1643 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1644 if (mLockdownTracker != null) { 1645 info = new NetworkInfo(info); 1646 mLockdownTracker.augmentNetworkInfo(info); 1647 } 1648 1649 Intent intent = new Intent(bcastType); 1650 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1651 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1652 if (info.isFailover()) { 1653 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1654 info.setFailover(false); 1655 } 1656 if (info.getReason() != null) { 1657 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1658 } 1659 if (info.getExtraInfo() != null) { 1660 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1661 info.getExtraInfo()); 1662 } 1663 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1664 return intent; 1665 } 1666 1667 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1668 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1669 } 1670 1671 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1672 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1673 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1674 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1675 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1676 final long ident = Binder.clearCallingIdentity(); 1677 try { 1678 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1679 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1680 } finally { 1681 Binder.restoreCallingIdentity(ident); 1682 } 1683 } 1684 1685 private void sendStickyBroadcast(Intent intent) { 1686 synchronized(this) { 1687 if (!mSystemReady) { 1688 mInitialBroadcast = new Intent(intent); 1689 } 1690 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1691 if (VDBG) { 1692 log("sendStickyBroadcast: action=" + intent.getAction()); 1693 } 1694 1695 Bundle options = null; 1696 final long ident = Binder.clearCallingIdentity(); 1697 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1698 final NetworkInfo ni = intent.getParcelableExtra( 1699 ConnectivityManager.EXTRA_NETWORK_INFO); 1700 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1701 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1702 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1703 } else { 1704 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1705 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1706 options = opts.toBundle(); 1707 } 1708 final IBatteryStats bs = BatteryStatsService.getService(); 1709 try { 1710 bs.noteConnectivityChanged(intent.getIntExtra( 1711 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1712 ni != null ? ni.getState().toString() : "?"); 1713 } catch (RemoteException e) { 1714 } 1715 } 1716 try { 1717 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1718 } finally { 1719 Binder.restoreCallingIdentity(ident); 1720 } 1721 } 1722 } 1723 1724 void systemReady() { 1725 loadGlobalProxy(); 1726 1727 synchronized(this) { 1728 mSystemReady = true; 1729 if (mInitialBroadcast != null) { 1730 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1731 mInitialBroadcast = null; 1732 } 1733 } 1734 // load the global proxy at startup 1735 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1736 1737 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1738 // for user to unlock device too. 1739 updateLockdownVpn(); 1740 1741 // Configure whether mobile data is always on. 1742 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1743 1744 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1745 1746 mPermissionMonitor.startMonitoring(); 1747 } 1748 1749 /** 1750 * Setup data activity tracking for the given network. 1751 * 1752 * Every {@code setupDataActivityTracking} should be paired with a 1753 * {@link #removeDataActivityTracking} for cleanup. 1754 */ 1755 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1756 final String iface = networkAgent.linkProperties.getInterfaceName(); 1757 1758 final int timeout; 1759 int type = ConnectivityManager.TYPE_NONE; 1760 1761 if (networkAgent.networkCapabilities.hasTransport( 1762 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1763 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1764 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1765 10); 1766 type = ConnectivityManager.TYPE_MOBILE; 1767 } else if (networkAgent.networkCapabilities.hasTransport( 1768 NetworkCapabilities.TRANSPORT_WIFI)) { 1769 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1770 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1771 15); 1772 type = ConnectivityManager.TYPE_WIFI; 1773 } else { 1774 // do not track any other networks 1775 timeout = 0; 1776 } 1777 1778 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1779 try { 1780 mNetd.addIdleTimer(iface, timeout, type); 1781 } catch (Exception e) { 1782 // You shall not crash! 1783 loge("Exception in setupDataActivityTracking " + e); 1784 } 1785 } 1786 } 1787 1788 /** 1789 * Remove data activity tracking when network disconnects. 1790 */ 1791 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1792 final String iface = networkAgent.linkProperties.getInterfaceName(); 1793 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1794 1795 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1796 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1797 try { 1798 // the call fails silently if no idletimer setup for this interface 1799 mNetd.removeIdleTimer(iface); 1800 } catch (Exception e) { 1801 loge("Exception in removeDataActivityTracking " + e); 1802 } 1803 } 1804 } 1805 1806 /** 1807 * Reads the network specific MTU size from reources. 1808 * and set it on it's iface. 1809 */ 1810 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1811 final String iface = newLp.getInterfaceName(); 1812 final int mtu = newLp.getMtu(); 1813 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1814 if (VDBG) log("identical MTU - not setting"); 1815 return; 1816 } 1817 1818 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1819 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1820 return; 1821 } 1822 1823 // Cannot set MTU without interface name 1824 if (TextUtils.isEmpty(iface)) { 1825 loge("Setting MTU size with null iface."); 1826 return; 1827 } 1828 1829 try { 1830 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1831 mNetd.setMtu(iface, mtu); 1832 } catch (Exception e) { 1833 Slog.e(TAG, "exception in setMtu()" + e); 1834 } 1835 } 1836 1837 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1838 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1839 1840 // Overridden for testing purposes to avoid writing to SystemProperties. 1841 @VisibleForTesting 1842 protected int getDefaultTcpRwnd() { 1843 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1844 } 1845 1846 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1847 if (isDefaultNetwork(nai) == false) { 1848 return; 1849 } 1850 1851 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1852 String[] values = null; 1853 if (tcpBufferSizes != null) { 1854 values = tcpBufferSizes.split(","); 1855 } 1856 1857 if (values == null || values.length != 6) { 1858 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1859 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1860 values = tcpBufferSizes.split(","); 1861 } 1862 1863 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1864 1865 try { 1866 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1867 1868 final String prefix = "/sys/kernel/ipv4/tcp_"; 1869 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1870 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1871 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1872 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1873 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1874 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1875 mCurrentTcpBufferSizes = tcpBufferSizes; 1876 } catch (IOException e) { 1877 loge("Can't set TCP buffer sizes:" + e); 1878 } 1879 1880 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1881 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1882 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1883 if (rwndValue != 0) { 1884 SystemProperties.set(sysctlKey, rwndValue.toString()); 1885 } 1886 } 1887 1888 private void flushVmDnsCache() { 1889 /* 1890 * Tell the VMs to toss their DNS caches 1891 */ 1892 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1893 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1894 /* 1895 * Connectivity events can happen before boot has completed ... 1896 */ 1897 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1898 final long ident = Binder.clearCallingIdentity(); 1899 try { 1900 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1901 } finally { 1902 Binder.restoreCallingIdentity(ident); 1903 } 1904 } 1905 1906 @Override 1907 public int getRestoreDefaultNetworkDelay(int networkType) { 1908 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1909 NETWORK_RESTORE_DELAY_PROP_NAME); 1910 if(restoreDefaultNetworkDelayStr != null && 1911 restoreDefaultNetworkDelayStr.length() != 0) { 1912 try { 1913 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1914 } catch (NumberFormatException e) { 1915 } 1916 } 1917 // if the system property isn't set, use the value for the apn type 1918 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1919 1920 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1921 (mNetConfigs[networkType] != null)) { 1922 ret = mNetConfigs[networkType].restoreTime; 1923 } 1924 return ret; 1925 } 1926 1927 private boolean argsContain(String[] args, String target) { 1928 for (String arg : args) { 1929 if (arg.equals(target)) return true; 1930 } 1931 return false; 1932 } 1933 1934 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1935 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1936 final long DIAG_TIME_MS = 5000; 1937 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1938 // Start gathering diagnostic information. 1939 netDiags.add(new NetworkDiagnostics( 1940 nai.network, 1941 new LinkProperties(nai.linkProperties), // Must be a copy. 1942 DIAG_TIME_MS)); 1943 } 1944 1945 for (NetworkDiagnostics netDiag : netDiags) { 1946 pw.println(); 1947 netDiag.waitForMeasurements(); 1948 netDiag.dump(pw); 1949 } 1950 } 1951 1952 @Override 1953 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1954 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1955 if (mContext.checkCallingOrSelfPermission( 1956 android.Manifest.permission.DUMP) 1957 != PackageManager.PERMISSION_GRANTED) { 1958 pw.println("Permission Denial: can't dump ConnectivityService " + 1959 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1960 Binder.getCallingUid()); 1961 return; 1962 } 1963 1964 if (argsContain(args, "--diag")) { 1965 dumpNetworkDiagnostics(pw); 1966 return; 1967 } 1968 1969 pw.print("NetworkFactories for:"); 1970 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1971 pw.print(" " + nfi.name); 1972 } 1973 pw.println(); 1974 pw.println(); 1975 1976 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1977 pw.print("Active default network: "); 1978 if (defaultNai == null) { 1979 pw.println("none"); 1980 } else { 1981 pw.println(defaultNai.network.netId); 1982 } 1983 pw.println(); 1984 1985 pw.println("Current Networks:"); 1986 pw.increaseIndent(); 1987 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1988 pw.println(nai.toString()); 1989 pw.increaseIndent(); 1990 pw.println(String.format( 1991 "Requests: REQUEST:%d LISTEN:%d BACKGROUND_REQUEST:%d total:%d", 1992 nai.numForegroundNetworkRequests(), 1993 nai.numNetworkRequests() - nai.numRequestNetworkRequests(), 1994 nai.numBackgroundNetworkRequests(), 1995 nai.numNetworkRequests())); 1996 pw.increaseIndent(); 1997 for (int i = 0; i < nai.numNetworkRequests(); i++) { 1998 pw.println(nai.requestAt(i).toString()); 1999 } 2000 pw.decreaseIndent(); 2001 pw.println("Lingered:"); 2002 pw.increaseIndent(); 2003 nai.dumpLingerTimers(pw); 2004 pw.decreaseIndent(); 2005 pw.decreaseIndent(); 2006 } 2007 pw.decreaseIndent(); 2008 pw.println(); 2009 2010 pw.println("Metered Interfaces:"); 2011 pw.increaseIndent(); 2012 for (String value : mMeteredIfaces) { 2013 pw.println(value); 2014 } 2015 pw.decreaseIndent(); 2016 pw.println(); 2017 2018 pw.print("Restrict background: "); 2019 pw.println(mRestrictBackground); 2020 pw.println(); 2021 2022 pw.println("Status for known UIDs:"); 2023 pw.increaseIndent(); 2024 final int size = mUidRules.size(); 2025 for (int i = 0; i < size; i++) { 2026 final int uid = mUidRules.keyAt(i); 2027 pw.print("UID="); 2028 pw.print(uid); 2029 final int uidRules = mUidRules.get(uid, RULE_NONE); 2030 pw.print(" rules="); 2031 pw.print(uidRulesToString(uidRules)); 2032 pw.println(); 2033 } 2034 pw.println(); 2035 pw.decreaseIndent(); 2036 2037 pw.println("Network Requests:"); 2038 pw.increaseIndent(); 2039 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2040 pw.println(nri.toString()); 2041 } 2042 pw.println(); 2043 pw.decreaseIndent(); 2044 2045 mLegacyTypeTracker.dump(pw); 2046 2047 synchronized (this) { 2048 pw.print("mNetTransitionWakeLock: currently " + 2049 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 2050 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 2051 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 2052 } else { 2053 pw.println(", last requested never"); 2054 } 2055 } 2056 2057 pw.println(); 2058 mTethering.dump(fd, pw, args); 2059 2060 pw.println(); 2061 mKeepaliveTracker.dump(pw); 2062 2063 pw.println(); 2064 2065 if (mInetLog != null && mInetLog.size() > 0) { 2066 pw.println(); 2067 pw.println("Inet condition reports:"); 2068 pw.increaseIndent(); 2069 for(int i = 0; i < mInetLog.size(); i++) { 2070 pw.println(mInetLog.get(i)); 2071 } 2072 pw.decreaseIndent(); 2073 } 2074 2075 if (argsContain(args, "--short") == false) { 2076 pw.println(); 2077 synchronized (mValidationLogs) { 2078 pw.println("mValidationLogs (most recent first):"); 2079 for (ValidationLog p : mValidationLogs) { 2080 pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); 2081 pw.increaseIndent(); 2082 p.mLog.dump(fd, pw, args); 2083 pw.decreaseIndent(); 2084 } 2085 } 2086 2087 pw.println(); 2088 pw.println("mNetworkRequestInfoLogs (most recent first):"); 2089 pw.increaseIndent(); 2090 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 2091 pw.decreaseIndent(); 2092 2093 pw.println(); 2094 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 2095 pw.increaseIndent(); 2096 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 2097 pw.decreaseIndent(); 2098 } 2099 } 2100 2101 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 2102 if (nai.network == null) return false; 2103 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 2104 if (officialNai != null && officialNai.equals(nai)) return true; 2105 if (officialNai != null || VDBG) { 2106 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 2107 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 2108 " - " + nai); 2109 } 2110 return false; 2111 } 2112 2113 // must be stateless - things change under us. 2114 private class NetworkStateTrackerHandler extends Handler { 2115 public NetworkStateTrackerHandler(Looper looper) { 2116 super(looper); 2117 } 2118 2119 private boolean maybeHandleAsyncChannelMessage(Message msg) { 2120 switch (msg.what) { 2121 default: 2122 return false; 2123 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2124 handleAsyncChannelHalfConnect(msg); 2125 break; 2126 } 2127 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2128 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2129 if (nai != null) nai.asyncChannel.disconnect(); 2130 break; 2131 } 2132 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2133 handleAsyncChannelDisconnected(msg); 2134 break; 2135 } 2136 } 2137 return true; 2138 } 2139 2140 private void maybeHandleNetworkAgentMessage(Message msg) { 2141 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2142 if (nai == null) { 2143 if (VDBG) { 2144 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 2145 log(String.format("%s from unknown NetworkAgent", what)); 2146 } 2147 return; 2148 } 2149 2150 switch (msg.what) { 2151 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2152 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2153 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2154 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED) || 2155 networkCapabilities.hasCapability(NET_CAPABILITY_FOREGROUND)) { 2156 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2157 } 2158 updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities); 2159 break; 2160 } 2161 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2162 if (VDBG) { 2163 log("Update of LinkProperties for " + nai.name() + 2164 "; created=" + nai.created + 2165 "; everConnected=" + nai.everConnected); 2166 } 2167 LinkProperties oldLp = nai.linkProperties; 2168 synchronized (nai) { 2169 nai.linkProperties = (LinkProperties)msg.obj; 2170 } 2171 if (nai.everConnected) updateLinkProperties(nai, oldLp); 2172 break; 2173 } 2174 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2175 NetworkInfo info = (NetworkInfo) msg.obj; 2176 updateNetworkInfo(nai, info); 2177 break; 2178 } 2179 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2180 Integer score = (Integer) msg.obj; 2181 if (score != null) updateNetworkScore(nai, score.intValue()); 2182 break; 2183 } 2184 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2185 try { 2186 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2187 } catch (Exception e) { 2188 // Never crash! 2189 loge("Exception in addVpnUidRanges: " + e); 2190 } 2191 break; 2192 } 2193 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2194 try { 2195 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2196 } catch (Exception e) { 2197 // Never crash! 2198 loge("Exception in removeVpnUidRanges: " + e); 2199 } 2200 break; 2201 } 2202 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2203 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2204 loge("ERROR: already-connected network explicitly selected."); 2205 } 2206 nai.networkMisc.explicitlySelected = true; 2207 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2208 break; 2209 } 2210 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2211 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2212 break; 2213 } 2214 } 2215 } 2216 2217 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2218 switch (msg.what) { 2219 default: 2220 return false; 2221 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2222 final NetworkAgentInfo nai; 2223 synchronized (mNetworkForNetId) { 2224 nai = mNetworkForNetId.get(msg.arg2); 2225 } 2226 if (nai != null) { 2227 final boolean valid = 2228 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2229 final boolean wasValidated = nai.lastValidated; 2230 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2231 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2232 if (valid != nai.lastValidated) { 2233 final int oldScore = nai.getCurrentScore(); 2234 nai.lastValidated = valid; 2235 nai.everValidated |= valid; 2236 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2237 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2238 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2239 } 2240 updateInetCondition(nai); 2241 // Let the NetworkAgent know the state of its network 2242 Bundle redirectUrlBundle = new Bundle(); 2243 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2244 nai.asyncChannel.sendMessage( 2245 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2246 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2247 0, redirectUrlBundle); 2248 if (wasValidated && !nai.lastValidated) { 2249 handleNetworkUnvalidated(nai); 2250 } 2251 } 2252 break; 2253 } 2254 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2255 final int netId = msg.arg2; 2256 final boolean visible = (msg.arg1 != 0); 2257 final NetworkAgentInfo nai; 2258 synchronized (mNetworkForNetId) { 2259 nai = mNetworkForNetId.get(netId); 2260 } 2261 // If captive portal status has changed, update capabilities. 2262 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2263 final int oldScore = nai.getCurrentScore(); 2264 nai.lastCaptivePortalDetected = visible; 2265 nai.everCaptivePortalDetected |= visible; 2266 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2267 } 2268 if (!visible) { 2269 mNotifier.clearNotification(netId); 2270 } else { 2271 if (nai == null) { 2272 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2273 break; 2274 } 2275 if (!nai.networkMisc.provisioningNotificationDisabled) { 2276 mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null, 2277 (PendingIntent) msg.obj, nai.networkMisc.explicitlySelected); 2278 } 2279 } 2280 break; 2281 } 2282 } 2283 return true; 2284 } 2285 2286 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2287 switch (msg.what) { 2288 default: 2289 return false; 2290 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2291 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2292 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2293 handleLingerComplete(nai); 2294 } 2295 break; 2296 } 2297 } 2298 return true; 2299 } 2300 2301 @Override 2302 public void handleMessage(Message msg) { 2303 if (!maybeHandleAsyncChannelMessage(msg) && 2304 !maybeHandleNetworkMonitorMessage(msg) && 2305 !maybeHandleNetworkAgentInfoMessage(msg)) { 2306 maybeHandleNetworkAgentMessage(msg); 2307 } 2308 } 2309 } 2310 2311 private void updateLingerState(NetworkAgentInfo nai, long now) { 2312 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2313 // 2. If the network was lingering and there are now requests, unlinger it. 2314 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2315 // one lingered request, start lingering. 2316 nai.updateLingerTimer(); 2317 if (nai.isLingering() && nai.numForegroundNetworkRequests() > 0) { 2318 if (DBG) log("Unlingering " + nai.name()); 2319 nai.unlinger(); 2320 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2321 } else if (unneeded(nai, UnneededFor.LINGER) && nai.getLingerExpiry() > 0) { 2322 int lingerTime = (int) (nai.getLingerExpiry() - now); 2323 if (DBG) log("Lingering " + nai.name() + " for " + lingerTime + "ms"); 2324 nai.linger(); 2325 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2326 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2327 } 2328 } 2329 2330 private void handleAsyncChannelHalfConnect(Message msg) { 2331 AsyncChannel ac = (AsyncChannel) msg.obj; 2332 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2333 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2334 if (VDBG) log("NetworkFactory connected"); 2335 // A network factory has connected. Send it all current NetworkRequests. 2336 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2337 if (nri.request.isListen()) continue; 2338 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2339 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2340 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2341 } 2342 } else { 2343 loge("Error connecting NetworkFactory"); 2344 mNetworkFactoryInfos.remove(msg.obj); 2345 } 2346 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2347 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2348 if (VDBG) log("NetworkAgent connected"); 2349 // A network agent has requested a connection. Establish the connection. 2350 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2351 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2352 } else { 2353 loge("Error connecting NetworkAgent"); 2354 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2355 if (nai != null) { 2356 final boolean wasDefault = isDefaultNetwork(nai); 2357 synchronized (mNetworkForNetId) { 2358 mNetworkForNetId.remove(nai.network.netId); 2359 mNetIdInUse.delete(nai.network.netId); 2360 } 2361 // Just in case. 2362 mLegacyTypeTracker.remove(nai, wasDefault); 2363 } 2364 } 2365 } 2366 } 2367 2368 private void handleAsyncChannelDisconnected(Message msg) { 2369 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2370 if (nai != null) { 2371 if (DBG) { 2372 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2373 } 2374 // A network agent has disconnected. 2375 // TODO - if we move the logic to the network agent (have them disconnect 2376 // because they lost all their requests or because their score isn't good) 2377 // then they would disconnect organically, report their new state and then 2378 // disconnect the channel. 2379 if (nai.networkInfo.isConnected()) { 2380 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2381 null, null); 2382 } 2383 final boolean wasDefault = isDefaultNetwork(nai); 2384 if (wasDefault) { 2385 mDefaultInetConditionPublished = 0; 2386 // Log default network disconnection before required book-keeping. 2387 // Let rematchAllNetworksAndRequests() below record a new default network event 2388 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2389 // whose timestamps tell how long it takes to recover a default network. 2390 logDefaultNetworkEvent(null, nai); 2391 } 2392 notifyIfacesChangedForNetworkStats(); 2393 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2394 // by other networks that are already connected. Perhaps that can be done by 2395 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2396 // of rematchAllNetworksAndRequests 2397 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2398 mKeepaliveTracker.handleStopAllKeepalives(nai, 2399 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2400 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2401 mNetworkAgentInfos.remove(msg.replyTo); 2402 updateClat(null, nai.linkProperties, nai); 2403 synchronized (mNetworkForNetId) { 2404 // Remove the NetworkAgent, but don't mark the netId as 2405 // available until we've told netd to delete it below. 2406 mNetworkForNetId.remove(nai.network.netId); 2407 } 2408 // Remove all previously satisfied requests. 2409 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2410 NetworkRequest request = nai.requestAt(i); 2411 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2412 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2413 mNetworkForRequestId.remove(request.requestId); 2414 sendUpdatedScoreToFactories(request, 0); 2415 } 2416 } 2417 nai.clearLingerState(); 2418 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2419 removeDataActivityTracking(nai); 2420 notifyLockdownVpn(nai); 2421 requestNetworkTransitionWakelock(nai.name()); 2422 } 2423 mLegacyTypeTracker.remove(nai, wasDefault); 2424 rematchAllNetworksAndRequests(null, 0); 2425 mLingerMonitor.noteDisconnect(nai); 2426 if (nai.created) { 2427 // Tell netd to clean up the configuration for this network 2428 // (routing rules, DNS, etc). 2429 // This may be slow as it requires a lot of netd shelling out to ip and 2430 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2431 // after we've rematched networks with requests which should make a potential 2432 // fallback network the default or requested a new network from the 2433 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2434 // long time. 2435 try { 2436 mNetd.removeNetwork(nai.network.netId); 2437 } catch (Exception e) { 2438 loge("Exception removing network: " + e); 2439 } 2440 } 2441 synchronized (mNetworkForNetId) { 2442 mNetIdInUse.delete(nai.network.netId); 2443 } 2444 } else { 2445 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2446 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2447 } 2448 } 2449 2450 // If this method proves to be too slow then we can maintain a separate 2451 // pendingIntent => NetworkRequestInfo map. 2452 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2453 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2454 Intent intent = pendingIntent.getIntent(); 2455 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2456 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2457 if (existingPendingIntent != null && 2458 existingPendingIntent.getIntent().filterEquals(intent)) { 2459 return entry.getValue(); 2460 } 2461 } 2462 return null; 2463 } 2464 2465 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2466 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2467 2468 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2469 if (existingRequest != null) { // remove the existing request. 2470 if (DBG) log("Replacing " + existingRequest.request + " with " 2471 + nri.request + " because their intents matched."); 2472 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2473 } 2474 handleRegisterNetworkRequest(nri); 2475 } 2476 2477 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2478 mNetworkRequests.put(nri.request, nri); 2479 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2480 if (nri.request.isListen()) { 2481 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2482 if (nri.request.networkCapabilities.hasSignalStrength() && 2483 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2484 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2485 } 2486 } 2487 } 2488 rematchAllNetworksAndRequests(null, 0); 2489 if (nri.request.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2490 sendUpdatedScoreToFactories(nri.request, 0); 2491 } 2492 } 2493 2494 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2495 int callingUid) { 2496 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2497 if (nri != null) { 2498 handleReleaseNetworkRequest(nri.request, callingUid); 2499 } 2500 } 2501 2502 // Determines whether the network is the best (or could become the best, if it validated), for 2503 // none of a particular type of NetworkRequests. The type of NetworkRequests considered depends 2504 // on the value of reason: 2505 // 2506 // - UnneededFor.TEARDOWN: non-listen NetworkRequests. If a network is unneeded for this reason, 2507 // then it should be torn down. 2508 // - UnneededFor.LINGER: foreground NetworkRequests. If a network is unneeded for this reason, 2509 // then it should be lingered. 2510 private boolean unneeded(NetworkAgentInfo nai, UnneededFor reason) { 2511 final int numRequests; 2512 switch (reason) { 2513 case TEARDOWN: 2514 numRequests = nai.numRequestNetworkRequests(); 2515 break; 2516 case LINGER: 2517 numRequests = nai.numForegroundNetworkRequests(); 2518 break; 2519 default: 2520 Slog.wtf(TAG, "Invalid reason. Cannot happen."); 2521 return true; 2522 } 2523 2524 if (!nai.everConnected || nai.isVPN() || nai.isLingering() || numRequests > 0) { 2525 return false; 2526 } 2527 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2528 if (reason == UnneededFor.LINGER && nri.request.isBackgroundRequest()) { 2529 // Background requests don't affect lingering. 2530 continue; 2531 } 2532 2533 // If this Network is already the highest scoring Network for a request, or if 2534 // there is hope for it to become one if it validated, then it is needed. 2535 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2536 (nai.isSatisfyingRequest(nri.request.requestId) || 2537 // Note that this catches two important cases: 2538 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2539 // is currently satisfying the request. This is desirable when 2540 // cellular ends up validating but WiFi does not. 2541 // 2. Unvalidated WiFi will not be reaped when validated cellular 2542 // is currently satisfying the request. This is desirable when 2543 // WiFi ends up validating and out scoring cellular. 2544 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2545 nai.getCurrentScoreAsValidated())) { 2546 return false; 2547 } 2548 } 2549 return true; 2550 } 2551 2552 private NetworkRequestInfo getNriForAppRequest( 2553 NetworkRequest request, int callingUid, String requestedOperation) { 2554 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2555 2556 if (nri != null) { 2557 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2558 log(String.format("UID %d attempted to %s for unowned request %s", 2559 callingUid, requestedOperation, nri)); 2560 return null; 2561 } 2562 } 2563 2564 return nri; 2565 } 2566 2567 private void handleRequestCallbackUpdate(NetworkRequest request, int callingUid, 2568 String description, int callbackType) { 2569 final NetworkRequestInfo nri = getNriForAppRequest(request, callingUid, description); 2570 if (nri == null) return; 2571 2572 final NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2573 // The network that is satisfying this request may have changed since 2574 // the application requested the update. 2575 // 2576 // - If the request is no longer satisfied, don't send any updates. 2577 // - If the request is satisfied by a different network, it is the 2578 // caller's responsibility to check that the Network object in the 2579 // callback matches the network that was returned in the last 2580 // onAvailable() callback for this request. 2581 if (nai == null) return; 2582 callCallbackForRequest(nri, nai, callbackType, 0); 2583 } 2584 2585 private void handleRequestLinkProperties(NetworkRequest request, int callingUid) { 2586 handleRequestCallbackUpdate(request, callingUid, 2587 "request LinkProperties", ConnectivityManager.CALLBACK_IP_CHANGED); 2588 } 2589 2590 private void handleRequestNetworkCapabilities(NetworkRequest request, int callingUid) { 2591 handleRequestCallbackUpdate(request, callingUid, 2592 "request NetworkCapabilities", ConnectivityManager.CALLBACK_CAP_CHANGED); 2593 } 2594 2595 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2596 final NetworkRequestInfo nri = getNriForAppRequest( 2597 request, callingUid, "release NetworkRequest"); 2598 if (nri == null) return; 2599 2600 if (VDBG || (DBG && nri.request.isRequest())) log("releasing " + request); 2601 nri.unlinkDeathRecipient(); 2602 mNetworkRequests.remove(request); 2603 synchronized (mUidToNetworkRequestCount) { 2604 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2605 if (requests < 1) { 2606 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2607 nri.mUid); 2608 } else if (requests == 1) { 2609 mUidToNetworkRequestCount.removeAt( 2610 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2611 } else { 2612 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2613 } 2614 } 2615 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2616 if (nri.request.isRequest()) { 2617 boolean wasKept = false; 2618 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2619 if (nai != null) { 2620 boolean wasBackgroundNetwork = nai.isBackgroundNetwork(); 2621 nai.removeRequest(nri.request.requestId); 2622 if (VDBG) { 2623 log(" Removing from current network " + nai.name() + 2624 ", leaving " + nai.numNetworkRequests() + " requests."); 2625 } 2626 // If there are still lingered requests on this network, don't tear it down, 2627 // but resume lingering instead. 2628 updateLingerState(nai, SystemClock.elapsedRealtime()); 2629 if (unneeded(nai, UnneededFor.TEARDOWN)) { 2630 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2631 teardownUnneededNetwork(nai); 2632 } else { 2633 wasKept = true; 2634 } 2635 mNetworkForRequestId.remove(nri.request.requestId); 2636 if (!wasBackgroundNetwork && nai.isBackgroundNetwork()) { 2637 // Went from foreground to background. 2638 updateCapabilities(nai.getCurrentScore(), nai, nai.networkCapabilities); 2639 } 2640 } 2641 2642 // TODO: remove this code once we know that the Slog.wtf is never hit. 2643 // 2644 // Find all networks that are satisfying this request and remove the request 2645 // from their request lists. 2646 // TODO - it's my understanding that for a request there is only a single 2647 // network satisfying it, so this loop is wasteful 2648 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2649 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2650 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2651 otherNai.name() + ", but mNetworkAgentInfos says " + 2652 (nai != null ? nai.name() : "null")); 2653 } 2654 } 2655 2656 // Maintain the illusion. When this request arrived, we might have pretended 2657 // that a network connected to serve it, even though the network was already 2658 // connected. Now that this request has gone away, we might have to pretend 2659 // that the network disconnected. LegacyTypeTracker will generate that 2660 // phantom disconnect for this type. 2661 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2662 boolean doRemove = true; 2663 if (wasKept) { 2664 // check if any of the remaining requests for this network are for the 2665 // same legacy type - if so, don't remove the nai 2666 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2667 NetworkRequest otherRequest = nai.requestAt(i); 2668 if (otherRequest.legacyType == nri.request.legacyType && 2669 otherRequest.isRequest()) { 2670 if (DBG) log(" still have other legacy request - leaving"); 2671 doRemove = false; 2672 } 2673 } 2674 } 2675 2676 if (doRemove) { 2677 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2678 } 2679 } 2680 2681 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2682 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2683 nri.request); 2684 } 2685 } else { 2686 // listens don't have a singular affectedNetwork. Check all networks to see 2687 // if this listen request applies and remove it. 2688 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2689 nai.removeRequest(nri.request.requestId); 2690 if (nri.request.networkCapabilities.hasSignalStrength() && 2691 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2692 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2693 } 2694 } 2695 } 2696 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED, 0); 2697 } 2698 2699 @Override 2700 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2701 enforceConnectivityInternalPermission(); 2702 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2703 accept ? 1 : 0, always ? 1: 0, network)); 2704 } 2705 2706 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2707 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2708 " accept=" + accept + " always=" + always); 2709 2710 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2711 if (nai == null) { 2712 // Nothing to do. 2713 return; 2714 } 2715 2716 if (nai.everValidated) { 2717 // The network validated while the dialog box was up. Take no action. 2718 return; 2719 } 2720 2721 if (!nai.networkMisc.explicitlySelected) { 2722 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2723 } 2724 2725 if (accept != nai.networkMisc.acceptUnvalidated) { 2726 int oldScore = nai.getCurrentScore(); 2727 nai.networkMisc.acceptUnvalidated = accept; 2728 rematchAllNetworksAndRequests(nai, oldScore); 2729 sendUpdatedScoreToFactories(nai); 2730 } 2731 2732 if (always) { 2733 nai.asyncChannel.sendMessage( 2734 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2735 } 2736 2737 if (!accept) { 2738 // Tell the NetworkAgent to not automatically reconnect to the network. 2739 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2740 // Teardown the nework. 2741 teardownUnneededNetwork(nai); 2742 } 2743 2744 } 2745 2746 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2747 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2748 mHandler.sendMessageDelayed( 2749 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2750 PROMPT_UNVALIDATED_DELAY_MS); 2751 } 2752 2753 @VisibleForTesting 2754 public boolean avoidBadWifi() { 2755 // There are two modes: either we always automatically avoid unvalidated wifi, or we show a 2756 // dialog and don't switch to it. The behaviour is controlled by the NETWORK_AVOID_BAD_WIFI 2757 // setting. If the setting has no value, then the value is taken from the config value, 2758 // which can be changed via OEM/carrier overlays. 2759 int defaultAvoidBadWifi = 2760 mContext.getResources().getInteger(R.integer.config_networkAvoidBadWifi); 2761 int avoid = Settings.Global.getInt(mContext.getContentResolver(), 2762 Settings.Global.NETWORK_AVOID_BAD_WIFI, defaultAvoidBadWifi); 2763 return avoid == 1; 2764 } 2765 2766 private void showValidationNotification(NetworkAgentInfo nai, NotificationType type) { 2767 final String action; 2768 switch (type) { 2769 case NO_INTERNET: 2770 action = ConnectivityManager.ACTION_PROMPT_UNVALIDATED; 2771 break; 2772 case LOST_INTERNET: 2773 action = ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION; 2774 break; 2775 default: 2776 Slog.wtf(TAG, "Unknown notification type " + type); 2777 return; 2778 } 2779 2780 Intent intent = new Intent(action); 2781 intent.setData(Uri.fromParts("netId", Integer.toString(nai.network.netId), null)); 2782 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2783 intent.setClassName("com.android.settings", 2784 "com.android.settings.wifi.WifiNoInternetDialog"); 2785 2786 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2787 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2788 mNotifier.showNotification(nai.network.netId, type, nai, null, pendingIntent, true); 2789 } 2790 2791 private void handlePromptUnvalidated(Network network) { 2792 if (VDBG) log("handlePromptUnvalidated " + network); 2793 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2794 2795 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2796 // we haven't already been told to switch to it regardless of whether it validated or not. 2797 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2798 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2799 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2800 return; 2801 } 2802 showValidationNotification(nai, NotificationType.NO_INTERNET); 2803 } 2804 2805 private void handleNetworkUnvalidated(NetworkAgentInfo nai) { 2806 NetworkCapabilities nc = nai.networkCapabilities; 2807 if (DBG) log("handleNetworkUnvalidated " + nai.name() + " cap=" + nc); 2808 2809 if (nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) && !avoidBadWifi()) { 2810 showValidationNotification(nai, NotificationType.LOST_INTERNET); 2811 } 2812 } 2813 2814 private class InternalHandler extends Handler { 2815 public InternalHandler(Looper looper) { 2816 super(looper); 2817 } 2818 2819 @Override 2820 public void handleMessage(Message msg) { 2821 switch (msg.what) { 2822 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2823 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2824 String causedBy = null; 2825 synchronized (ConnectivityService.this) { 2826 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2827 mNetTransitionWakeLock.isHeld()) { 2828 mNetTransitionWakeLock.release(); 2829 causedBy = mNetTransitionWakeLockCausedBy; 2830 } else { 2831 break; 2832 } 2833 } 2834 if (VDBG) { 2835 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2836 log("Failed to find a new network - expiring NetTransition Wakelock"); 2837 } else { 2838 log("NetTransition Wakelock (" + 2839 (causedBy == null ? "unknown" : causedBy) + 2840 " cleared because we found a replacement network"); 2841 } 2842 } 2843 break; 2844 } 2845 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2846 handleDeprecatedGlobalHttpProxy(); 2847 break; 2848 } 2849 case EVENT_PROXY_HAS_CHANGED: { 2850 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2851 break; 2852 } 2853 case EVENT_REGISTER_NETWORK_FACTORY: { 2854 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2855 break; 2856 } 2857 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2858 handleUnregisterNetworkFactory((Messenger)msg.obj); 2859 break; 2860 } 2861 case EVENT_REGISTER_NETWORK_AGENT: { 2862 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2863 break; 2864 } 2865 case EVENT_REGISTER_NETWORK_REQUEST: 2866 case EVENT_REGISTER_NETWORK_LISTENER: { 2867 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2868 break; 2869 } 2870 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2871 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2872 handleRegisterNetworkRequestWithIntent(msg); 2873 break; 2874 } 2875 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2876 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2877 break; 2878 } 2879 case EVENT_RELEASE_NETWORK_REQUEST: { 2880 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2881 break; 2882 } 2883 case EVENT_SET_ACCEPT_UNVALIDATED: { 2884 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2885 break; 2886 } 2887 case EVENT_PROMPT_UNVALIDATED: { 2888 handlePromptUnvalidated((Network) msg.obj); 2889 break; 2890 } 2891 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2892 handleMobileDataAlwaysOn(); 2893 break; 2894 } 2895 case EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI: { 2896 rematchAllNetworksAndRequests(null, 0); 2897 break; 2898 } 2899 case EVENT_REQUEST_LINKPROPERTIES: 2900 handleRequestLinkProperties((NetworkRequest) msg.obj, msg.arg1); 2901 break; 2902 case EVENT_REQUEST_NETCAPABILITIES: 2903 handleRequestNetworkCapabilities((NetworkRequest) msg.obj, msg.arg1); 2904 break; 2905 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2906 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2907 mKeepaliveTracker.handleStartKeepalive(msg); 2908 break; 2909 } 2910 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2911 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2912 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2913 int slot = msg.arg1; 2914 int reason = msg.arg2; 2915 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2916 break; 2917 } 2918 case EVENT_SYSTEM_READY: { 2919 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2920 nai.networkMonitor.systemReady = true; 2921 } 2922 break; 2923 } 2924 } 2925 } 2926 } 2927 2928 // javadoc from interface 2929 @Override 2930 public int tether(String iface) { 2931 ConnectivityManager.enforceTetherChangePermission(mContext); 2932 if (isTetheringSupported()) { 2933 final int status = mTethering.tether(iface); 2934 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2935 try { 2936 mPolicyManager.onTetheringChanged(iface, true); 2937 } catch (RemoteException e) { 2938 } 2939 } 2940 return status; 2941 } else { 2942 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2943 } 2944 } 2945 2946 // javadoc from interface 2947 @Override 2948 public int untether(String iface) { 2949 ConnectivityManager.enforceTetherChangePermission(mContext); 2950 2951 if (isTetheringSupported()) { 2952 final int status = mTethering.untether(iface); 2953 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2954 try { 2955 mPolicyManager.onTetheringChanged(iface, false); 2956 } catch (RemoteException e) { 2957 } 2958 } 2959 return status; 2960 } else { 2961 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2962 } 2963 } 2964 2965 // javadoc from interface 2966 @Override 2967 public int getLastTetherError(String iface) { 2968 enforceTetherAccessPermission(); 2969 2970 if (isTetheringSupported()) { 2971 return mTethering.getLastTetherError(iface); 2972 } else { 2973 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2974 } 2975 } 2976 2977 // TODO - proper iface API for selection by property, inspection, etc 2978 @Override 2979 public String[] getTetherableUsbRegexs() { 2980 enforceTetherAccessPermission(); 2981 if (isTetheringSupported()) { 2982 return mTethering.getTetherableUsbRegexs(); 2983 } else { 2984 return new String[0]; 2985 } 2986 } 2987 2988 @Override 2989 public String[] getTetherableWifiRegexs() { 2990 enforceTetherAccessPermission(); 2991 if (isTetheringSupported()) { 2992 return mTethering.getTetherableWifiRegexs(); 2993 } else { 2994 return new String[0]; 2995 } 2996 } 2997 2998 @Override 2999 public String[] getTetherableBluetoothRegexs() { 3000 enforceTetherAccessPermission(); 3001 if (isTetheringSupported()) { 3002 return mTethering.getTetherableBluetoothRegexs(); 3003 } else { 3004 return new String[0]; 3005 } 3006 } 3007 3008 @Override 3009 public int setUsbTethering(boolean enable) { 3010 ConnectivityManager.enforceTetherChangePermission(mContext); 3011 if (isTetheringSupported()) { 3012 return mTethering.setUsbTethering(enable); 3013 } else { 3014 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3015 } 3016 } 3017 3018 // TODO - move iface listing, queries, etc to new module 3019 // javadoc from interface 3020 @Override 3021 public String[] getTetherableIfaces() { 3022 enforceTetherAccessPermission(); 3023 return mTethering.getTetherableIfaces(); 3024 } 3025 3026 @Override 3027 public String[] getTetheredIfaces() { 3028 enforceTetherAccessPermission(); 3029 return mTethering.getTetheredIfaces(); 3030 } 3031 3032 @Override 3033 public String[] getTetheringErroredIfaces() { 3034 enforceTetherAccessPermission(); 3035 return mTethering.getErroredIfaces(); 3036 } 3037 3038 @Override 3039 public String[] getTetheredDhcpRanges() { 3040 enforceConnectivityInternalPermission(); 3041 return mTethering.getTetheredDhcpRanges(); 3042 } 3043 3044 // if ro.tether.denied = true we default to no tethering 3045 // gservices could set the secure setting to 1 though to enable it on a build where it 3046 // had previously been turned off. 3047 @Override 3048 public boolean isTetheringSupported() { 3049 enforceTetherAccessPermission(); 3050 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 3051 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 3052 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 3053 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 3054 return tetherEnabledInSettings && mUserManager.isAdminUser() && 3055 ((mTethering.getTetherableUsbRegexs().length != 0 || 3056 mTethering.getTetherableWifiRegexs().length != 0 || 3057 mTethering.getTetherableBluetoothRegexs().length != 0) && 3058 mTethering.getUpstreamIfaceTypes().length != 0); 3059 } 3060 3061 @Override 3062 public void startTethering(int type, ResultReceiver receiver, 3063 boolean showProvisioningUi) { 3064 ConnectivityManager.enforceTetherChangePermission(mContext); 3065 if (!isTetheringSupported()) { 3066 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 3067 return; 3068 } 3069 mTethering.startTethering(type, receiver, showProvisioningUi); 3070 } 3071 3072 @Override 3073 public void stopTethering(int type) { 3074 ConnectivityManager.enforceTetherChangePermission(mContext); 3075 mTethering.stopTethering(type); 3076 } 3077 3078 // Called when we lose the default network and have no replacement yet. 3079 // This will automatically be cleared after X seconds or a new default network 3080 // becomes CONNECTED, whichever happens first. The timer is started by the 3081 // first caller and not restarted by subsequent callers. 3082 private void requestNetworkTransitionWakelock(String forWhom) { 3083 int serialNum = 0; 3084 synchronized (this) { 3085 if (mNetTransitionWakeLock.isHeld()) return; 3086 serialNum = ++mNetTransitionWakeLockSerialNumber; 3087 mNetTransitionWakeLock.acquire(); 3088 mNetTransitionWakeLockCausedBy = forWhom; 3089 } 3090 mHandler.sendMessageDelayed(mHandler.obtainMessage( 3091 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 3092 mNetTransitionWakeLockTimeout); 3093 return; 3094 } 3095 3096 // 100 percent is full good, 0 is full bad. 3097 @Override 3098 public void reportInetCondition(int networkType, int percentage) { 3099 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 3100 if (nai == null) return; 3101 reportNetworkConnectivity(nai.network, percentage > 50); 3102 } 3103 3104 @Override 3105 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 3106 enforceAccessPermission(); 3107 enforceInternetPermission(); 3108 3109 NetworkAgentInfo nai; 3110 if (network == null) { 3111 nai = getDefaultNetwork(); 3112 } else { 3113 nai = getNetworkAgentInfoForNetwork(network); 3114 } 3115 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 3116 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 3117 return; 3118 } 3119 // Revalidate if the app report does not match our current validated state. 3120 if (hasConnectivity == nai.lastValidated) return; 3121 final int uid = Binder.getCallingUid(); 3122 if (DBG) { 3123 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 3124 ") by " + uid); 3125 } 3126 synchronized (nai) { 3127 // Validating a network that has not yet connected could result in a call to 3128 // rematchNetworkAndRequests() which is not meant to work on such networks. 3129 if (!nai.everConnected) return; 3130 3131 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 3132 3133 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 3134 } 3135 } 3136 3137 private ProxyInfo getDefaultProxy() { 3138 // this information is already available as a world read/writable jvm property 3139 // so this API change wouldn't have a benifit. It also breaks the passing 3140 // of proxy info to all the JVMs. 3141 // enforceAccessPermission(); 3142 synchronized (mProxyLock) { 3143 ProxyInfo ret = mGlobalProxy; 3144 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3145 return ret; 3146 } 3147 } 3148 3149 @Override 3150 public ProxyInfo getProxyForNetwork(Network network) { 3151 if (network == null) return getDefaultProxy(); 3152 final ProxyInfo globalProxy = getGlobalProxy(); 3153 if (globalProxy != null) return globalProxy; 3154 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3155 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3156 // caller may not have. 3157 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3158 if (nai == null) return null; 3159 synchronized (nai) { 3160 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3161 if (proxyInfo == null) return null; 3162 return new ProxyInfo(proxyInfo); 3163 } 3164 } 3165 3166 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3167 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3168 // proxy is null then there is no proxy in place). 3169 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3170 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3171 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3172 proxy = null; 3173 } 3174 return proxy; 3175 } 3176 3177 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3178 // better for determining if a new proxy broadcast is necessary: 3179 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3180 // avoid unnecessary broadcasts. 3181 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3182 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3183 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3184 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3185 // all set. 3186 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3187 a = canonicalizeProxyInfo(a); 3188 b = canonicalizeProxyInfo(b); 3189 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3190 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3191 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3192 } 3193 3194 public void setGlobalProxy(ProxyInfo proxyProperties) { 3195 enforceConnectivityInternalPermission(); 3196 3197 synchronized (mProxyLock) { 3198 if (proxyProperties == mGlobalProxy) return; 3199 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3200 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3201 3202 String host = ""; 3203 int port = 0; 3204 String exclList = ""; 3205 String pacFileUrl = ""; 3206 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3207 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3208 if (!proxyProperties.isValid()) { 3209 if (DBG) 3210 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3211 return; 3212 } 3213 mGlobalProxy = new ProxyInfo(proxyProperties); 3214 host = mGlobalProxy.getHost(); 3215 port = mGlobalProxy.getPort(); 3216 exclList = mGlobalProxy.getExclusionListAsString(); 3217 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3218 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3219 } 3220 } else { 3221 mGlobalProxy = null; 3222 } 3223 ContentResolver res = mContext.getContentResolver(); 3224 final long token = Binder.clearCallingIdentity(); 3225 try { 3226 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3227 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3228 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3229 exclList); 3230 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3231 } finally { 3232 Binder.restoreCallingIdentity(token); 3233 } 3234 3235 if (mGlobalProxy == null) { 3236 proxyProperties = mDefaultProxy; 3237 } 3238 sendProxyBroadcast(proxyProperties); 3239 } 3240 } 3241 3242 private void loadGlobalProxy() { 3243 ContentResolver res = mContext.getContentResolver(); 3244 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3245 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3246 String exclList = Settings.Global.getString(res, 3247 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3248 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3249 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3250 ProxyInfo proxyProperties; 3251 if (!TextUtils.isEmpty(pacFileUrl)) { 3252 proxyProperties = new ProxyInfo(pacFileUrl); 3253 } else { 3254 proxyProperties = new ProxyInfo(host, port, exclList); 3255 } 3256 if (!proxyProperties.isValid()) { 3257 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3258 return; 3259 } 3260 3261 synchronized (mProxyLock) { 3262 mGlobalProxy = proxyProperties; 3263 } 3264 } 3265 } 3266 3267 public ProxyInfo getGlobalProxy() { 3268 // this information is already available as a world read/writable jvm property 3269 // so this API change wouldn't have a benifit. It also breaks the passing 3270 // of proxy info to all the JVMs. 3271 // enforceAccessPermission(); 3272 synchronized (mProxyLock) { 3273 return mGlobalProxy; 3274 } 3275 } 3276 3277 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3278 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3279 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3280 proxy = null; 3281 } 3282 synchronized (mProxyLock) { 3283 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3284 if (mDefaultProxy == proxy) return; // catches repeated nulls 3285 if (proxy != null && !proxy.isValid()) { 3286 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3287 return; 3288 } 3289 3290 // This call could be coming from the PacManager, containing the port of the local 3291 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3292 // global (to get the correct local port), and send a broadcast. 3293 // TODO: Switch PacManager to have its own message to send back rather than 3294 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3295 if ((mGlobalProxy != null) && (proxy != null) 3296 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3297 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3298 mGlobalProxy = proxy; 3299 sendProxyBroadcast(mGlobalProxy); 3300 return; 3301 } 3302 mDefaultProxy = proxy; 3303 3304 if (mGlobalProxy != null) return; 3305 if (!mDefaultProxyDisabled) { 3306 sendProxyBroadcast(proxy); 3307 } 3308 } 3309 } 3310 3311 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3312 // This method gets called when any network changes proxy, but the broadcast only ever contains 3313 // the default proxy (even if it hasn't changed). 3314 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3315 // world where an app might be bound to a non-default network. 3316 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3317 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3318 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3319 3320 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3321 sendProxyBroadcast(getDefaultProxy()); 3322 } 3323 } 3324 3325 private void handleDeprecatedGlobalHttpProxy() { 3326 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3327 Settings.Global.HTTP_PROXY); 3328 if (!TextUtils.isEmpty(proxy)) { 3329 String data[] = proxy.split(":"); 3330 if (data.length == 0) { 3331 return; 3332 } 3333 3334 String proxyHost = data[0]; 3335 int proxyPort = 8080; 3336 if (data.length > 1) { 3337 try { 3338 proxyPort = Integer.parseInt(data[1]); 3339 } catch (NumberFormatException e) { 3340 return; 3341 } 3342 } 3343 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3344 setGlobalProxy(p); 3345 } 3346 } 3347 3348 private void sendProxyBroadcast(ProxyInfo proxy) { 3349 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3350 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3351 if (DBG) log("sending Proxy Broadcast for " + proxy); 3352 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3353 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3354 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3355 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3356 final long ident = Binder.clearCallingIdentity(); 3357 try { 3358 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3359 } finally { 3360 Binder.restoreCallingIdentity(ident); 3361 } 3362 } 3363 3364 private static class SettingsObserver extends ContentObserver { 3365 final private HashMap<Uri, Integer> mUriEventMap; 3366 final private Context mContext; 3367 final private Handler mHandler; 3368 3369 SettingsObserver(Context context, Handler handler) { 3370 super(null); 3371 mUriEventMap = new HashMap<Uri, Integer>(); 3372 mContext = context; 3373 mHandler = handler; 3374 } 3375 3376 void observe(Uri uri, int what) { 3377 mUriEventMap.put(uri, what); 3378 final ContentResolver resolver = mContext.getContentResolver(); 3379 resolver.registerContentObserver(uri, false, this); 3380 } 3381 3382 @Override 3383 public void onChange(boolean selfChange) { 3384 Slog.wtf(TAG, "Should never be reached."); 3385 } 3386 3387 @Override 3388 public void onChange(boolean selfChange, Uri uri) { 3389 final Integer what = mUriEventMap.get(uri); 3390 if (what != null) { 3391 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3392 } else { 3393 loge("No matching event to send for URI=" + uri); 3394 } 3395 } 3396 } 3397 3398 private static void log(String s) { 3399 Slog.d(TAG, s); 3400 } 3401 3402 private static void loge(String s) { 3403 Slog.e(TAG, s); 3404 } 3405 3406 private static <T> T checkNotNull(T value, String message) { 3407 if (value == null) { 3408 throw new NullPointerException(message); 3409 } 3410 return value; 3411 } 3412 3413 /** 3414 * Prepare for a VPN application. 3415 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3416 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3417 * 3418 * @param oldPackage Package name of the application which currently controls VPN, which will 3419 * be replaced. If there is no such application, this should should either be 3420 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3421 * @param newPackage Package name of the application which should gain control of VPN, or 3422 * {@code null} to disable. 3423 * @param userId User for whom to prepare the new VPN. 3424 * 3425 * @hide 3426 */ 3427 @Override 3428 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3429 int userId) { 3430 enforceCrossUserPermission(userId); 3431 throwIfLockdownEnabled(); 3432 3433 synchronized(mVpns) { 3434 Vpn vpn = mVpns.get(userId); 3435 if (vpn != null) { 3436 return vpn.prepare(oldPackage, newPackage); 3437 } else { 3438 return false; 3439 } 3440 } 3441 } 3442 3443 /** 3444 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3445 * This method is used by system-privileged apps. 3446 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3447 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3448 * 3449 * @param packageName The package for which authorization state should change. 3450 * @param userId User for whom {@code packageName} is installed. 3451 * @param authorized {@code true} if this app should be able to start a VPN connection without 3452 * explicit user approval, {@code false} if not. 3453 * 3454 * @hide 3455 */ 3456 @Override 3457 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3458 enforceCrossUserPermission(userId); 3459 3460 synchronized(mVpns) { 3461 Vpn vpn = mVpns.get(userId); 3462 if (vpn != null) { 3463 vpn.setPackageAuthorization(packageName, authorized); 3464 } 3465 } 3466 } 3467 3468 /** 3469 * Configure a TUN interface and return its file descriptor. Parameters 3470 * are encoded and opaque to this class. This method is used by VpnBuilder 3471 * and not available in ConnectivityManager. Permissions are checked in 3472 * Vpn class. 3473 * @hide 3474 */ 3475 @Override 3476 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3477 throwIfLockdownEnabled(); 3478 int user = UserHandle.getUserId(Binder.getCallingUid()); 3479 synchronized(mVpns) { 3480 return mVpns.get(user).establish(config); 3481 } 3482 } 3483 3484 /** 3485 * Start legacy VPN, controlling native daemons as needed. Creates a 3486 * secondary thread to perform connection work, returning quickly. 3487 */ 3488 @Override 3489 public void startLegacyVpn(VpnProfile profile) { 3490 throwIfLockdownEnabled(); 3491 final LinkProperties egress = getActiveLinkProperties(); 3492 if (egress == null) { 3493 throw new IllegalStateException("Missing active network connection"); 3494 } 3495 int user = UserHandle.getUserId(Binder.getCallingUid()); 3496 synchronized(mVpns) { 3497 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3498 } 3499 } 3500 3501 /** 3502 * Return the information of the ongoing legacy VPN. This method is used 3503 * by VpnSettings and not available in ConnectivityManager. Permissions 3504 * are checked in Vpn class. 3505 */ 3506 @Override 3507 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3508 enforceCrossUserPermission(userId); 3509 3510 synchronized(mVpns) { 3511 return mVpns.get(userId).getLegacyVpnInfo(); 3512 } 3513 } 3514 3515 /** 3516 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3517 * and not available in ConnectivityManager. 3518 */ 3519 @Override 3520 public VpnInfo[] getAllVpnInfo() { 3521 enforceConnectivityInternalPermission(); 3522 if (mLockdownEnabled) { 3523 return new VpnInfo[0]; 3524 } 3525 3526 synchronized(mVpns) { 3527 List<VpnInfo> infoList = new ArrayList<>(); 3528 for (int i = 0; i < mVpns.size(); i++) { 3529 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3530 if (info != null) { 3531 infoList.add(info); 3532 } 3533 } 3534 return infoList.toArray(new VpnInfo[infoList.size()]); 3535 } 3536 } 3537 3538 /** 3539 * @return VPN information for accounting, or null if we can't retrieve all required 3540 * information, e.g primary underlying iface. 3541 */ 3542 @Nullable 3543 private VpnInfo createVpnInfo(Vpn vpn) { 3544 VpnInfo info = vpn.getVpnInfo(); 3545 if (info == null) { 3546 return null; 3547 } 3548 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3549 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3550 // the underlyingNetworks list. 3551 if (underlyingNetworks == null) { 3552 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3553 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3554 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3555 } 3556 } else if (underlyingNetworks.length > 0) { 3557 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3558 if (linkProperties != null) { 3559 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3560 } 3561 } 3562 return info.primaryUnderlyingIface == null ? null : info; 3563 } 3564 3565 /** 3566 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3567 * VpnDialogs and not available in ConnectivityManager. 3568 * Permissions are checked in Vpn class. 3569 * @hide 3570 */ 3571 @Override 3572 public VpnConfig getVpnConfig(int userId) { 3573 enforceCrossUserPermission(userId); 3574 synchronized(mVpns) { 3575 Vpn vpn = mVpns.get(userId); 3576 if (vpn != null) { 3577 return vpn.getVpnConfig(); 3578 } else { 3579 return null; 3580 } 3581 } 3582 } 3583 3584 @Override 3585 public boolean updateLockdownVpn() { 3586 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3587 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3588 return false; 3589 } 3590 3591 // Tear down existing lockdown if profile was removed 3592 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3593 if (mLockdownEnabled) { 3594 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3595 final VpnProfile profile = VpnProfile.decode( 3596 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3597 if (profile == null) { 3598 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3599 setLockdownTracker(null); 3600 return true; 3601 } 3602 int user = UserHandle.getUserId(Binder.getCallingUid()); 3603 synchronized(mVpns) { 3604 Vpn vpn = mVpns.get(user); 3605 if (vpn == null) { 3606 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3607 return false; 3608 } 3609 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3610 } 3611 } else { 3612 setLockdownTracker(null); 3613 } 3614 3615 return true; 3616 } 3617 3618 /** 3619 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3620 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3621 */ 3622 private void setLockdownTracker(LockdownVpnTracker tracker) { 3623 // Shutdown any existing tracker 3624 final LockdownVpnTracker existing = mLockdownTracker; 3625 mLockdownTracker = null; 3626 if (existing != null) { 3627 existing.shutdown(); 3628 } 3629 3630 try { 3631 if (tracker != null) { 3632 mNetd.setFirewallEnabled(true); 3633 mNetd.setFirewallInterfaceRule("lo", true); 3634 mLockdownTracker = tracker; 3635 mLockdownTracker.init(); 3636 } else { 3637 mNetd.setFirewallEnabled(false); 3638 } 3639 } catch (RemoteException e) { 3640 // ignored; NMS lives inside system_server 3641 } 3642 } 3643 3644 private void throwIfLockdownEnabled() { 3645 if (mLockdownEnabled) { 3646 throw new IllegalStateException("Unavailable in lockdown mode"); 3647 } 3648 } 3649 3650 /** 3651 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3652 * some setup and then call {@code establish()} to connect. 3653 * 3654 * @return {@code true} if the service was started, the service was already connected, or there 3655 * was no always-on VPN to start. {@code false} otherwise. 3656 */ 3657 private boolean startAlwaysOnVpn(int userId) { 3658 synchronized (mVpns) { 3659 Vpn vpn = mVpns.get(userId); 3660 if (vpn == null) { 3661 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3662 // exists already. 3663 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3664 return false; 3665 } 3666 3667 return vpn.startAlwaysOnVpn(); 3668 } 3669 } 3670 3671 @Override 3672 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3673 enforceConnectivityInternalPermission(); 3674 enforceCrossUserPermission(userId); 3675 3676 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3677 if (LockdownVpnTracker.isEnabled()) { 3678 return false; 3679 } 3680 3681 synchronized (mVpns) { 3682 Vpn vpn = mVpns.get(userId); 3683 if (vpn == null) { 3684 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3685 return false; 3686 } 3687 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3688 return false; 3689 } 3690 if (!startAlwaysOnVpn(userId)) { 3691 vpn.setAlwaysOnPackage(null, false); 3692 return false; 3693 } 3694 3695 vpn.saveAlwaysOnPackage(); 3696 } 3697 return true; 3698 } 3699 3700 @Override 3701 public String getAlwaysOnVpnPackage(int userId) { 3702 enforceConnectivityInternalPermission(); 3703 enforceCrossUserPermission(userId); 3704 3705 synchronized (mVpns) { 3706 Vpn vpn = mVpns.get(userId); 3707 if (vpn == null) { 3708 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3709 return null; 3710 } 3711 return vpn.getAlwaysOnPackage(); 3712 } 3713 } 3714 3715 @Override 3716 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3717 // TODO: Remove? Any reason to trigger a provisioning check? 3718 return -1; 3719 } 3720 3721 /** Location to an updatable file listing carrier provisioning urls. 3722 * An example: 3723 * 3724 * <?xml version="1.0" encoding="utf-8"?> 3725 * <provisioningUrls> 3726 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3727 * </provisioningUrls> 3728 */ 3729 private static final String PROVISIONING_URL_PATH = 3730 "/data/misc/radio/provisioning_urls.xml"; 3731 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3732 3733 /** XML tag for root element. */ 3734 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3735 /** XML tag for individual url */ 3736 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3737 /** XML attribute for mcc */ 3738 private static final String ATTR_MCC = "mcc"; 3739 /** XML attribute for mnc */ 3740 private static final String ATTR_MNC = "mnc"; 3741 3742 private String getProvisioningUrlBaseFromFile() { 3743 FileReader fileReader = null; 3744 XmlPullParser parser = null; 3745 Configuration config = mContext.getResources().getConfiguration(); 3746 3747 try { 3748 fileReader = new FileReader(mProvisioningUrlFile); 3749 parser = Xml.newPullParser(); 3750 parser.setInput(fileReader); 3751 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3752 3753 while (true) { 3754 XmlUtils.nextElement(parser); 3755 3756 String element = parser.getName(); 3757 if (element == null) break; 3758 3759 if (element.equals(TAG_PROVISIONING_URL)) { 3760 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3761 try { 3762 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3763 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3764 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3765 parser.next(); 3766 if (parser.getEventType() == XmlPullParser.TEXT) { 3767 return parser.getText(); 3768 } 3769 } 3770 } 3771 } catch (NumberFormatException e) { 3772 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3773 } 3774 } 3775 } 3776 return null; 3777 } catch (FileNotFoundException e) { 3778 loge("Carrier Provisioning Urls file not found"); 3779 } catch (XmlPullParserException e) { 3780 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3781 } catch (IOException e) { 3782 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3783 } finally { 3784 if (fileReader != null) { 3785 try { 3786 fileReader.close(); 3787 } catch (IOException e) {} 3788 } 3789 } 3790 return null; 3791 } 3792 3793 @Override 3794 public String getMobileProvisioningUrl() { 3795 enforceConnectivityInternalPermission(); 3796 String url = getProvisioningUrlBaseFromFile(); 3797 if (TextUtils.isEmpty(url)) { 3798 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3799 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3800 } else { 3801 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3802 } 3803 // populate the iccid, imei and phone number in the provisioning url. 3804 if (!TextUtils.isEmpty(url)) { 3805 String phoneNumber = mTelephonyManager.getLine1Number(); 3806 if (TextUtils.isEmpty(phoneNumber)) { 3807 phoneNumber = "0000000000"; 3808 } 3809 url = String.format(url, 3810 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3811 mTelephonyManager.getDeviceId() /* IMEI */, 3812 phoneNumber /* Phone numer */); 3813 } 3814 3815 return url; 3816 } 3817 3818 @Override 3819 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3820 String action) { 3821 enforceConnectivityInternalPermission(); 3822 final long ident = Binder.clearCallingIdentity(); 3823 try { 3824 // Concatenate the range of types onto the range of NetIDs. 3825 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3826 mNotifier.setProvNotificationVisible(visible, id, action); 3827 } finally { 3828 Binder.restoreCallingIdentity(ident); 3829 } 3830 } 3831 3832 @Override 3833 public void setAirplaneMode(boolean enable) { 3834 enforceConnectivityInternalPermission(); 3835 final long ident = Binder.clearCallingIdentity(); 3836 try { 3837 final ContentResolver cr = mContext.getContentResolver(); 3838 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3839 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3840 intent.putExtra("state", enable); 3841 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3842 } finally { 3843 Binder.restoreCallingIdentity(ident); 3844 } 3845 } 3846 3847 private void onUserStart(int userId) { 3848 synchronized(mVpns) { 3849 Vpn userVpn = mVpns.get(userId); 3850 if (userVpn != null) { 3851 loge("Starting user already has a VPN"); 3852 return; 3853 } 3854 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3855 mVpns.put(userId, userVpn); 3856 3857 final ContentResolver cr = mContext.getContentResolver(); 3858 String alwaysOnPackage = Settings.Secure.getStringForUser(cr, 3859 Settings.Secure.ALWAYS_ON_VPN_APP, userId); 3860 final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, 3861 Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; 3862 if (alwaysOnPackage != null) { 3863 userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); 3864 } 3865 } 3866 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3867 updateLockdownVpn(); 3868 } 3869 } 3870 3871 private void onUserStop(int userId) { 3872 synchronized(mVpns) { 3873 Vpn userVpn = mVpns.get(userId); 3874 if (userVpn == null) { 3875 loge("Stopped user has no VPN"); 3876 return; 3877 } 3878 userVpn.onUserStopped(); 3879 mVpns.delete(userId); 3880 } 3881 } 3882 3883 private void onUserAdded(int userId) { 3884 synchronized(mVpns) { 3885 final int vpnsSize = mVpns.size(); 3886 for (int i = 0; i < vpnsSize; i++) { 3887 Vpn vpn = mVpns.valueAt(i); 3888 vpn.onUserAdded(userId); 3889 } 3890 } 3891 } 3892 3893 private void onUserRemoved(int userId) { 3894 synchronized(mVpns) { 3895 final int vpnsSize = mVpns.size(); 3896 for (int i = 0; i < vpnsSize; i++) { 3897 Vpn vpn = mVpns.valueAt(i); 3898 vpn.onUserRemoved(userId); 3899 } 3900 } 3901 } 3902 3903 private void onUserUnlocked(int userId) { 3904 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3905 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3906 updateLockdownVpn(); 3907 } else { 3908 startAlwaysOnVpn(userId); 3909 } 3910 } 3911 3912 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3913 @Override 3914 public void onReceive(Context context, Intent intent) { 3915 final String action = intent.getAction(); 3916 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3917 if (userId == UserHandle.USER_NULL) return; 3918 3919 if (Intent.ACTION_USER_STARTED.equals(action)) { 3920 onUserStart(userId); 3921 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3922 onUserStop(userId); 3923 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3924 onUserAdded(userId); 3925 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3926 onUserRemoved(userId); 3927 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3928 onUserUnlocked(userId); 3929 } 3930 } 3931 }; 3932 3933 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3934 new HashMap<Messenger, NetworkFactoryInfo>(); 3935 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3936 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3937 3938 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3939 // Map from UID to number of NetworkRequests that UID has filed. 3940 @GuardedBy("mUidToNetworkRequestCount") 3941 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3942 3943 private static class NetworkFactoryInfo { 3944 public final String name; 3945 public final Messenger messenger; 3946 public final AsyncChannel asyncChannel; 3947 3948 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3949 this.name = name; 3950 this.messenger = messenger; 3951 this.asyncChannel = asyncChannel; 3952 } 3953 } 3954 3955 private void ensureNetworkRequestHasType(NetworkRequest request) { 3956 if (request.type == NetworkRequest.Type.NONE) { 3957 throw new IllegalArgumentException( 3958 "All NetworkRequests in ConnectivityService must have a type"); 3959 } 3960 } 3961 3962 /** 3963 * Tracks info about the requester. 3964 * Also used to notice when the calling process dies so we can self-expire 3965 */ 3966 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3967 final NetworkRequest request; 3968 final PendingIntent mPendingIntent; 3969 boolean mPendingIntentSent; 3970 private final IBinder mBinder; 3971 final int mPid; 3972 final int mUid; 3973 final Messenger messenger; 3974 3975 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 3976 request = r; 3977 ensureNetworkRequestHasType(request); 3978 mPendingIntent = pi; 3979 messenger = null; 3980 mBinder = null; 3981 mPid = getCallingPid(); 3982 mUid = getCallingUid(); 3983 enforceRequestCountLimit(); 3984 } 3985 3986 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 3987 super(); 3988 messenger = m; 3989 request = r; 3990 ensureNetworkRequestHasType(request); 3991 mBinder = binder; 3992 mPid = getCallingPid(); 3993 mUid = getCallingUid(); 3994 mPendingIntent = null; 3995 enforceRequestCountLimit(); 3996 3997 try { 3998 mBinder.linkToDeath(this, 0); 3999 } catch (RemoteException e) { 4000 binderDied(); 4001 } 4002 } 4003 4004 private void enforceRequestCountLimit() { 4005 synchronized (mUidToNetworkRequestCount) { 4006 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 4007 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 4008 throw new IllegalArgumentException("Too many NetworkRequests filed"); 4009 } 4010 mUidToNetworkRequestCount.put(mUid, networkRequests); 4011 } 4012 } 4013 4014 void unlinkDeathRecipient() { 4015 if (mBinder != null) { 4016 mBinder.unlinkToDeath(this, 0); 4017 } 4018 } 4019 4020 public void binderDied() { 4021 log("ConnectivityService NetworkRequestInfo binderDied(" + 4022 request + ", " + mBinder + ")"); 4023 releaseNetworkRequest(request); 4024 } 4025 4026 public String toString() { 4027 return "uid/pid:" + mUid + "/" + mPid + " " + request + 4028 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 4029 } 4030 } 4031 4032 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 4033 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 4034 if (badCapability != null) { 4035 throw new IllegalArgumentException("Cannot request network with " + badCapability); 4036 } 4037 } 4038 4039 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 4040 final SortedSet<Integer> thresholds = new TreeSet(); 4041 synchronized (nai) { 4042 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4043 if (nri.request.networkCapabilities.hasSignalStrength() && 4044 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 4045 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 4046 } 4047 } 4048 } 4049 return new ArrayList<Integer>(thresholds); 4050 } 4051 4052 private void updateSignalStrengthThresholds( 4053 NetworkAgentInfo nai, String reason, NetworkRequest request) { 4054 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 4055 Bundle thresholds = new Bundle(); 4056 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 4057 4058 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 4059 String detail; 4060 if (request != null && request.networkCapabilities.hasSignalStrength()) { 4061 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 4062 } else { 4063 detail = reason; 4064 } 4065 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 4066 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 4067 } 4068 4069 nai.asyncChannel.sendMessage( 4070 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 4071 0, 0, thresholds); 4072 } 4073 4074 @Override 4075 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 4076 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 4077 final NetworkRequest.Type type = (networkCapabilities == null) 4078 ? NetworkRequest.Type.TRACK_DEFAULT 4079 : NetworkRequest.Type.REQUEST; 4080 // If the requested networkCapabilities is null, take them instead from 4081 // the default network request. This allows callers to keep track of 4082 // the system default network. 4083 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 4084 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 4085 enforceAccessPermission(); 4086 } else { 4087 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4088 enforceNetworkRequestPermissions(networkCapabilities); 4089 // TODO: this is incorrect. We mark the request as metered or not depending on the state 4090 // of the app when the request is filed, but we never change the request if the app 4091 // changes network state. http://b/29964605 4092 enforceMeteredApnPolicy(networkCapabilities); 4093 } 4094 ensureRequestableCapabilities(networkCapabilities); 4095 4096 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 4097 throw new IllegalArgumentException("Bad timeout specified"); 4098 } 4099 4100 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 4101 .equals(networkCapabilities.getNetworkSpecifier())) { 4102 throw new IllegalArgumentException("Invalid network specifier - must not be '" 4103 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 4104 } 4105 4106 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4107 nextNetworkRequestId(), type); 4108 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4109 if (DBG) log("requestNetwork for " + nri); 4110 4111 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4112 if (timeoutMs > 0) { 4113 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4114 nri), timeoutMs); 4115 } 4116 return networkRequest; 4117 } 4118 4119 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4120 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4121 enforceConnectivityRestrictedNetworksPermission(); 4122 } else { 4123 enforceChangePermission(); 4124 } 4125 } 4126 4127 @Override 4128 public boolean requestBandwidthUpdate(Network network) { 4129 enforceAccessPermission(); 4130 NetworkAgentInfo nai = null; 4131 if (network == null) { 4132 return false; 4133 } 4134 synchronized (mNetworkForNetId) { 4135 nai = mNetworkForNetId.get(network.netId); 4136 } 4137 if (nai != null) { 4138 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4139 return true; 4140 } 4141 return false; 4142 } 4143 4144 private boolean isSystem(int uid) { 4145 return uid < Process.FIRST_APPLICATION_UID; 4146 } 4147 4148 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4149 final int uid = Binder.getCallingUid(); 4150 if (isSystem(uid)) { 4151 return; 4152 } 4153 // if UID is restricted, don't allow them to bring up metered APNs 4154 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 4155 final int uidRules; 4156 synchronized(mRulesLock) { 4157 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 4158 } 4159 if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 4160 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { 4161 // we could silently fail or we can filter the available nets to only give 4162 // them those they have access to. Chose the more useful option. 4163 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4164 } 4165 } 4166 } 4167 4168 @Override 4169 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4170 PendingIntent operation) { 4171 checkNotNull(operation, "PendingIntent cannot be null."); 4172 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4173 enforceNetworkRequestPermissions(networkCapabilities); 4174 enforceMeteredApnPolicy(networkCapabilities); 4175 ensureRequestableCapabilities(networkCapabilities); 4176 4177 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4178 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4179 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4180 if (DBG) log("pendingRequest for " + nri); 4181 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4182 nri)); 4183 return networkRequest; 4184 } 4185 4186 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4187 mHandler.sendMessageDelayed( 4188 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4189 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4190 } 4191 4192 @Override 4193 public void releasePendingNetworkRequest(PendingIntent operation) { 4194 checkNotNull(operation, "PendingIntent cannot be null."); 4195 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4196 getCallingUid(), 0, operation)); 4197 } 4198 4199 // In order to implement the compatibility measure for pre-M apps that call 4200 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4201 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4202 // This ensures it has permission to do so. 4203 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4204 if (nc == null) { 4205 return false; 4206 } 4207 int[] transportTypes = nc.getTransportTypes(); 4208 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4209 return false; 4210 } 4211 try { 4212 mContext.enforceCallingOrSelfPermission( 4213 android.Manifest.permission.ACCESS_WIFI_STATE, 4214 "ConnectivityService"); 4215 } catch (SecurityException e) { 4216 return false; 4217 } 4218 return true; 4219 } 4220 4221 @Override 4222 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4223 Messenger messenger, IBinder binder) { 4224 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4225 enforceAccessPermission(); 4226 } 4227 4228 NetworkRequest networkRequest = new NetworkRequest( 4229 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4230 NetworkRequest.Type.LISTEN); 4231 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4232 if (VDBG) log("listenForNetwork for " + nri); 4233 4234 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4235 return networkRequest; 4236 } 4237 4238 @Override 4239 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4240 PendingIntent operation) { 4241 checkNotNull(operation, "PendingIntent cannot be null."); 4242 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4243 enforceAccessPermission(); 4244 } 4245 4246 NetworkRequest networkRequest = new NetworkRequest( 4247 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4248 NetworkRequest.Type.LISTEN); 4249 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4250 if (VDBG) log("pendingListenForNetwork for " + nri); 4251 4252 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4253 } 4254 4255 @Override 4256 public void requestLinkProperties(NetworkRequest networkRequest) { 4257 ensureNetworkRequestHasType(networkRequest); 4258 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4259 mHandler.sendMessage(mHandler.obtainMessage( 4260 EVENT_REQUEST_LINKPROPERTIES, getCallingUid(), 0, networkRequest)); 4261 } 4262 4263 @Override 4264 public void requestNetworkCapabilities(NetworkRequest networkRequest) { 4265 ensureNetworkRequestHasType(networkRequest); 4266 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4267 mHandler.sendMessage(mHandler.obtainMessage( 4268 EVENT_REQUEST_NETCAPABILITIES, getCallingUid(), 0, networkRequest)); 4269 } 4270 4271 @Override 4272 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4273 ensureNetworkRequestHasType(networkRequest); 4274 mHandler.sendMessage(mHandler.obtainMessage( 4275 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4276 } 4277 4278 @Override 4279 public void registerNetworkFactory(Messenger messenger, String name) { 4280 enforceConnectivityInternalPermission(); 4281 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4282 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4283 } 4284 4285 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4286 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4287 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4288 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4289 } 4290 4291 @Override 4292 public void unregisterNetworkFactory(Messenger messenger) { 4293 enforceConnectivityInternalPermission(); 4294 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4295 } 4296 4297 private void handleUnregisterNetworkFactory(Messenger messenger) { 4298 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4299 if (nfi == null) { 4300 loge("Failed to find Messenger in unregisterNetworkFactory"); 4301 return; 4302 } 4303 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4304 } 4305 4306 /** 4307 * NetworkAgentInfo supporting a request by requestId. 4308 * These have already been vetted (their Capabilities satisfy the request) 4309 * and the are the highest scored network available. 4310 * the are keyed off the Requests requestId. 4311 */ 4312 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4313 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4314 new SparseArray<NetworkAgentInfo>(); 4315 4316 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4317 @GuardedBy("mNetworkForNetId") 4318 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4319 new SparseArray<NetworkAgentInfo>(); 4320 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4321 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4322 // there may not be a strict 1:1 correlation between the two. 4323 @GuardedBy("mNetworkForNetId") 4324 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4325 4326 // NetworkAgentInfo keyed off its connecting messenger 4327 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4328 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4329 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4330 new HashMap<Messenger, NetworkAgentInfo>(); 4331 4332 @GuardedBy("mBlockedAppUids") 4333 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4334 4335 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4336 private final NetworkRequest mDefaultRequest; 4337 4338 // Request used to optionally keep mobile data active even when higher 4339 // priority networks like Wi-Fi are active. 4340 private final NetworkRequest mDefaultMobileDataRequest; 4341 4342 private NetworkAgentInfo getDefaultNetwork() { 4343 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4344 } 4345 4346 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4347 return nai == getDefaultNetwork(); 4348 } 4349 4350 private boolean isDefaultRequest(NetworkRequestInfo nri) { 4351 return nri.request.requestId == mDefaultRequest.requestId; 4352 } 4353 4354 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4355 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4356 int currentScore, NetworkMisc networkMisc) { 4357 enforceConnectivityInternalPermission(); 4358 4359 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4360 // satisfies mDefaultRequest. 4361 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4362 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4363 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4364 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4365 synchronized (this) { 4366 nai.networkMonitor.systemReady = mSystemReady; 4367 } 4368 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, 4369 networkInfo.getExtraInfo()); 4370 if (DBG) log("registerNetworkAgent " + nai); 4371 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4372 return nai.network.netId; 4373 } 4374 4375 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4376 if (VDBG) log("Got NetworkAgent Messenger"); 4377 mNetworkAgentInfos.put(na.messenger, na); 4378 synchronized (mNetworkForNetId) { 4379 mNetworkForNetId.put(na.network.netId, na); 4380 } 4381 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4382 NetworkInfo networkInfo = na.networkInfo; 4383 na.networkInfo = null; 4384 updateNetworkInfo(na, networkInfo); 4385 } 4386 4387 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4388 LinkProperties newLp = networkAgent.linkProperties; 4389 int netId = networkAgent.network.netId; 4390 4391 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4392 // we do anything else, make sure its LinkProperties are accurate. 4393 if (networkAgent.clatd != null) { 4394 networkAgent.clatd.fixupLinkProperties(oldLp); 4395 } 4396 4397 updateInterfaces(newLp, oldLp, netId); 4398 updateMtu(newLp, oldLp); 4399 // TODO - figure out what to do for clat 4400// for (LinkProperties lp : newLp.getStackedLinks()) { 4401// updateMtu(lp, null); 4402// } 4403 updateTcpBufferSizes(networkAgent); 4404 4405 updateRoutes(newLp, oldLp, netId); 4406 updateDnses(newLp, oldLp, netId); 4407 4408 updateClat(newLp, oldLp, networkAgent); 4409 if (isDefaultNetwork(networkAgent)) { 4410 handleApplyDefaultProxy(newLp.getHttpProxy()); 4411 } else { 4412 updateProxy(newLp, oldLp, networkAgent); 4413 } 4414 // TODO - move this check to cover the whole function 4415 if (!Objects.equals(newLp, oldLp)) { 4416 notifyIfacesChangedForNetworkStats(); 4417 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4418 } 4419 4420 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4421 } 4422 4423 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4424 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4425 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4426 4427 if (!wasRunningClat && shouldRunClat) { 4428 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4429 nai.clatd.start(); 4430 } else if (wasRunningClat && !shouldRunClat) { 4431 nai.clatd.stop(); 4432 } 4433 } 4434 4435 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4436 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4437 if (oldLp != null) { 4438 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4439 } else if (newLp != null) { 4440 interfaceDiff.added = newLp.getAllInterfaceNames(); 4441 } 4442 for (String iface : interfaceDiff.added) { 4443 try { 4444 if (DBG) log("Adding iface " + iface + " to network " + netId); 4445 mNetd.addInterfaceToNetwork(iface, netId); 4446 } catch (Exception e) { 4447 loge("Exception adding interface: " + e); 4448 } 4449 } 4450 for (String iface : interfaceDiff.removed) { 4451 try { 4452 if (DBG) log("Removing iface " + iface + " from network " + netId); 4453 mNetd.removeInterfaceFromNetwork(iface, netId); 4454 } catch (Exception e) { 4455 loge("Exception removing interface: " + e); 4456 } 4457 } 4458 } 4459 4460 /** 4461 * Have netd update routes from oldLp to newLp. 4462 * @return true if routes changed between oldLp and newLp 4463 */ 4464 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4465 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4466 if (oldLp != null) { 4467 routeDiff = oldLp.compareAllRoutes(newLp); 4468 } else if (newLp != null) { 4469 routeDiff.added = newLp.getAllRoutes(); 4470 } 4471 4472 // add routes before removing old in case it helps with continuous connectivity 4473 4474 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4475 for (RouteInfo route : routeDiff.added) { 4476 if (route.hasGateway()) continue; 4477 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4478 try { 4479 mNetd.addRoute(netId, route); 4480 } catch (Exception e) { 4481 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4482 loge("Exception in addRoute for non-gateway: " + e); 4483 } 4484 } 4485 } 4486 for (RouteInfo route : routeDiff.added) { 4487 if (route.hasGateway() == false) continue; 4488 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4489 try { 4490 mNetd.addRoute(netId, route); 4491 } catch (Exception e) { 4492 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4493 loge("Exception in addRoute for gateway: " + e); 4494 } 4495 } 4496 } 4497 4498 for (RouteInfo route : routeDiff.removed) { 4499 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4500 try { 4501 mNetd.removeRoute(netId, route); 4502 } catch (Exception e) { 4503 loge("Exception in removeRoute: " + e); 4504 } 4505 } 4506 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4507 } 4508 4509 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4510 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4511 return; // no updating necessary 4512 } 4513 4514 Collection<InetAddress> dnses = newLp.getDnsServers(); 4515 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4516 try { 4517 mNetd.setDnsConfigurationForNetwork( 4518 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4519 } catch (Exception e) { 4520 loge("Exception in setDnsConfigurationForNetwork: " + e); 4521 } 4522 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4523 if (defaultNai != null && defaultNai.network.netId == netId) { 4524 setDefaultDnsSystemProperties(dnses); 4525 } 4526 flushVmDnsCache(); 4527 } 4528 4529 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4530 int last = 0; 4531 for (InetAddress dns : dnses) { 4532 ++last; 4533 String key = "net.dns" + last; 4534 String value = dns.getHostAddress(); 4535 SystemProperties.set(key, value); 4536 } 4537 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4538 String key = "net.dns" + i; 4539 SystemProperties.set(key, ""); 4540 } 4541 mNumDnsEntries = last; 4542 } 4543 4544 /** 4545 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4546 * augmented with any stateful capabilities implied from {@code networkAgent} 4547 * (e.g., validated status and captive portal status). 4548 * 4549 * @param oldScore score of the network before any of the changes that prompted us 4550 * to call this function. 4551 * @param nai the network having its capabilities updated. 4552 * @param networkCapabilities the new network capabilities. 4553 */ 4554 private void updateCapabilities( 4555 int oldScore, NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4556 if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( 4557 networkCapabilities)) { 4558 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 4559 + nai.networkCapabilities + " -> " + networkCapabilities); 4560 } 4561 4562 // Don't modify caller's NetworkCapabilities. 4563 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4564 if (nai.lastValidated) { 4565 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4566 } else { 4567 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4568 } 4569 if (nai.lastCaptivePortalDetected) { 4570 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4571 } else { 4572 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4573 } 4574 if (nai.isBackgroundNetwork()) { 4575 networkCapabilities.removeCapability(NET_CAPABILITY_FOREGROUND); 4576 } else { 4577 networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 4578 } 4579 4580 if (Objects.equals(nai.networkCapabilities, networkCapabilities)) return; 4581 4582 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4583 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4584 try { 4585 mNetd.setNetworkPermission(nai.network.netId, 4586 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4587 null : NetworkManagementService.PERMISSION_SYSTEM); 4588 } catch (RemoteException e) { 4589 loge("Exception in setNetworkPermission: " + e); 4590 } 4591 } 4592 4593 final NetworkCapabilities prevNc = nai.networkCapabilities; 4594 synchronized (nai) { 4595 nai.networkCapabilities = networkCapabilities; 4596 } 4597 if (nai.getCurrentScore() == oldScore && 4598 networkCapabilities.equalRequestableCapabilities(prevNc)) { 4599 // If the requestable capabilities haven't changed, and the score hasn't changed, then 4600 // the change we're processing can't affect any requests, it can only affect the listens 4601 // on this network. We might have been called by rematchNetworkAndRequests when a 4602 // network changed foreground state. 4603 processListenRequests(nai, true); 4604 } else { 4605 // If the requestable capabilities have changed or the score changed, we can't have been 4606 // called by rematchNetworkAndRequests, so it's safe to start a rematch. 4607 rematchAllNetworksAndRequests(nai, oldScore); 4608 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4609 } 4610 } 4611 4612 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4613 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4614 NetworkRequest nr = nai.requestAt(i); 4615 // Don't send listening requests to factories. b/17393458 4616 if (nr.isListen()) continue; 4617 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4618 } 4619 } 4620 4621 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4622 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4623 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4624 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4625 networkRequest); 4626 } 4627 } 4628 4629 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4630 int notificationType) { 4631 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4632 Intent intent = new Intent(); 4633 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4634 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4635 nri.mPendingIntentSent = true; 4636 sendIntent(nri.mPendingIntent, intent); 4637 } 4638 // else not handled 4639 } 4640 4641 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4642 mPendingIntentWakeLock.acquire(); 4643 try { 4644 if (DBG) log("Sending " + pendingIntent); 4645 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4646 } catch (PendingIntent.CanceledException e) { 4647 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4648 mPendingIntentWakeLock.release(); 4649 releasePendingNetworkRequest(pendingIntent); 4650 } 4651 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4652 } 4653 4654 @Override 4655 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4656 String resultData, Bundle resultExtras) { 4657 if (DBG) log("Finished sending " + pendingIntent); 4658 mPendingIntentWakeLock.release(); 4659 // Release with a delay so the receiving client has an opportunity to put in its 4660 // own request. 4661 releasePendingNetworkRequestWithDelay(pendingIntent); 4662 } 4663 4664 private void callCallbackForRequest(NetworkRequestInfo nri, 4665 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 4666 if (nri.messenger == null) return; // Default request has no msgr 4667 Bundle bundle = new Bundle(); 4668 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4669 new NetworkRequest(nri.request)); 4670 Message msg = Message.obtain(); 4671 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4672 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4673 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4674 } 4675 switch (notificationType) { 4676 case ConnectivityManager.CALLBACK_LOSING: { 4677 msg.arg1 = arg1; 4678 break; 4679 } 4680 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4681 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4682 new NetworkCapabilities(networkAgent.networkCapabilities)); 4683 break; 4684 } 4685 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4686 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4687 new LinkProperties(networkAgent.linkProperties)); 4688 break; 4689 } 4690 } 4691 msg.what = notificationType; 4692 msg.setData(bundle); 4693 try { 4694 if (VDBG) { 4695 log("sending notification " + notifyTypeToName(notificationType) + 4696 " for " + nri.request); 4697 } 4698 nri.messenger.send(msg); 4699 } catch (RemoteException e) { 4700 // may occur naturally in the race of binder death. 4701 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4702 } 4703 } 4704 4705 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4706 if (nai.numRequestNetworkRequests() != 0) { 4707 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4708 NetworkRequest nr = nai.requestAt(i); 4709 // Ignore listening requests. 4710 if (nr.isListen()) continue; 4711 loge("Dead network still had at least " + nr); 4712 break; 4713 } 4714 } 4715 nai.asyncChannel.disconnect(); 4716 } 4717 4718 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4719 if (oldNetwork == null) { 4720 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4721 return; 4722 } 4723 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4724 4725 // If we get here it means that the last linger timeout for this network expired. So there 4726 // must be no other active linger timers, and we must stop lingering. 4727 oldNetwork.clearLingerState(); 4728 4729 if (unneeded(oldNetwork, UnneededFor.TEARDOWN)) { 4730 // Tear the network down. 4731 teardownUnneededNetwork(oldNetwork); 4732 } else { 4733 // Put the network in the background. 4734 updateCapabilities(oldNetwork.getCurrentScore(), oldNetwork, 4735 oldNetwork.networkCapabilities); 4736 } 4737 } 4738 4739 private void makeDefault(NetworkAgentInfo newNetwork) { 4740 if (DBG) log("Switching to new default network: " + newNetwork); 4741 setupDataActivityTracking(newNetwork); 4742 try { 4743 mNetd.setDefaultNetId(newNetwork.network.netId); 4744 } catch (Exception e) { 4745 loge("Exception setting default network :" + e); 4746 } 4747 notifyLockdownVpn(newNetwork); 4748 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4749 updateTcpBufferSizes(newNetwork); 4750 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4751 } 4752 4753 private void processListenRequests(NetworkAgentInfo nai, boolean capabilitiesChanged) { 4754 // For consistency with previous behaviour, send onLost callbacks before onAvailable. 4755 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4756 NetworkRequest nr = nri.request; 4757 if (!nr.isListen()) continue; 4758 if (nai.isSatisfyingRequest(nr.requestId) && !nai.satisfies(nr)) { 4759 nai.removeRequest(nri.request.requestId); 4760 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_LOST, 0); 4761 } 4762 } 4763 4764 if (capabilitiesChanged) { 4765 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4766 } 4767 4768 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4769 NetworkRequest nr = nri.request; 4770 if (!nr.isListen()) continue; 4771 if (nai.satisfies(nr) && !nai.isSatisfyingRequest(nr.requestId)) { 4772 nai.addRequest(nr); 4773 notifyNetworkCallback(nai, nri); 4774 } 4775 } 4776 } 4777 4778 // Handles a network appearing or improving its score. 4779 // 4780 // - Evaluates all current NetworkRequests that can be 4781 // satisfied by newNetwork, and reassigns to newNetwork 4782 // any such requests for which newNetwork is the best. 4783 // 4784 // - Lingers any validated Networks that as a result are no longer 4785 // needed. A network is needed if it is the best network for 4786 // one or more NetworkRequests, or if it is a VPN. 4787 // 4788 // - Tears down newNetwork if it just became validated 4789 // but turns out to be unneeded. 4790 // 4791 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4792 // networks that have no chance (i.e. even if validated) 4793 // of becoming the highest scoring network. 4794 // 4795 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4796 // it does not remove NetworkRequests that other Networks could better satisfy. 4797 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4798 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4799 // as it performs better by a factor of the number of Networks. 4800 // 4801 // @param newNetwork is the network to be matched against NetworkRequests. 4802 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4803 // performed to tear down unvalidated networks that have no chance (i.e. even if 4804 // validated) of becoming the highest scoring network. 4805 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4806 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 4807 if (!newNetwork.everConnected) return; 4808 boolean keep = newNetwork.isVPN(); 4809 boolean isNewDefault = false; 4810 NetworkAgentInfo oldDefaultNetwork = null; 4811 4812 final boolean wasBackgroundNetwork = newNetwork.isBackgroundNetwork(); 4813 final int score = newNetwork.getCurrentScore(); 4814 4815 if (VDBG) log("rematching " + newNetwork.name()); 4816 4817 // Find and migrate to this Network any NetworkRequests for 4818 // which this network is now the best. 4819 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4820 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4821 NetworkCapabilities nc = newNetwork.networkCapabilities; 4822 if (VDBG) log(" network has: " + nc); 4823 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4824 // Process requests in the first pass and listens in the second pass. This allows us to 4825 // change a network's capabilities depending on which requests it has. This is only 4826 // correct if the change in capabilities doesn't affect whether the network satisfies 4827 // requests or not, and doesn't affect the network's score. 4828 if (nri.request.isListen()) continue; 4829 4830 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4831 final boolean satisfies = newNetwork.satisfies(nri.request); 4832 if (newNetwork == currentNetwork && satisfies) { 4833 if (VDBG) { 4834 log("Network " + newNetwork.name() + " was already satisfying" + 4835 " request " + nri.request.requestId + ". No change."); 4836 } 4837 keep = true; 4838 continue; 4839 } 4840 4841 // check if it satisfies the NetworkCapabilities 4842 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4843 if (satisfies) { 4844 // next check if it's better than any current network we're using for 4845 // this request 4846 if (VDBG) { 4847 log("currentScore = " + 4848 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4849 ", newScore = " + score); 4850 } 4851 if (currentNetwork == null || currentNetwork.getCurrentScore() < score) { 4852 if (VDBG) log("rematch for " + newNetwork.name()); 4853 if (currentNetwork != null) { 4854 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4855 currentNetwork.removeRequest(nri.request.requestId); 4856 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 4857 affectedNetworks.add(currentNetwork); 4858 } else { 4859 if (VDBG) log(" accepting network in place of null"); 4860 } 4861 newNetwork.unlingerRequest(nri.request); 4862 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4863 if (!newNetwork.addRequest(nri.request)) { 4864 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4865 } 4866 addedRequests.add(nri); 4867 keep = true; 4868 // Tell NetworkFactories about the new score, so they can stop 4869 // trying to connect if they know they cannot match it. 4870 // TODO - this could get expensive if we have alot of requests for this 4871 // network. Think about if there is a way to reduce this. Push 4872 // netid->request mapping to each factory? 4873 sendUpdatedScoreToFactories(nri.request, score); 4874 if (isDefaultRequest(nri)) { 4875 isNewDefault = true; 4876 oldDefaultNetwork = currentNetwork; 4877 if (currentNetwork != null) { 4878 mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork); 4879 } 4880 } 4881 } 4882 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 4883 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4884 // mark it as no longer satisfying "nri". Because networks are processed by 4885 // rematchAllNetworksAndRequests() in descending score order, "currentNetwork" will 4886 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4887 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4888 // This means this code doesn't have to handle the case where "currentNetwork" no 4889 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4890 if (DBG) { 4891 log("Network " + newNetwork.name() + " stopped satisfying" + 4892 " request " + nri.request.requestId); 4893 } 4894 newNetwork.removeRequest(nri.request.requestId); 4895 if (currentNetwork == newNetwork) { 4896 mNetworkForRequestId.remove(nri.request.requestId); 4897 sendUpdatedScoreToFactories(nri.request, 0); 4898 } else { 4899 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4900 newNetwork.name() + 4901 " without updating mNetworkForRequestId or factories!"); 4902 } 4903 // TODO: Technically, sending CALLBACK_LOST here is 4904 // incorrect if there is a replacement network currently 4905 // connected that can satisfy nri, which is a request 4906 // (not a listen). However, the only capability that can both 4907 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4908 // so this code is only incorrect for a network that loses 4909 // the TRUSTED capability, which is a rare case. 4910 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 4911 } 4912 } 4913 if (isNewDefault) { 4914 // Notify system services that this network is up. 4915 makeDefault(newNetwork); 4916 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 4917 logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); 4918 synchronized (ConnectivityService.this) { 4919 // have a new default network, release the transition wakelock in 4920 // a second if it's held. The second pause is to allow apps 4921 // to reconnect over the new network 4922 if (mNetTransitionWakeLock.isHeld()) { 4923 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4924 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4925 mNetTransitionWakeLockSerialNumber, 0), 4926 1000); 4927 } 4928 } 4929 } 4930 4931 if (!newNetwork.networkCapabilities.equalRequestableCapabilities(nc)) { 4932 Slog.wtf(TAG, String.format( 4933 "BUG: %s changed requestable capabilities during rematch: %s -> %s", 4934 nc, newNetwork.networkCapabilities)); 4935 } 4936 if (newNetwork.getCurrentScore() != score) { 4937 Slog.wtf(TAG, String.format( 4938 "BUG: %s changed score during rematch: %d -> %d", 4939 score, newNetwork.getCurrentScore())); 4940 } 4941 4942 // Second pass: process all listens. 4943 if (wasBackgroundNetwork != newNetwork.isBackgroundNetwork()) { 4944 // If the network went from background to foreground or vice versa, we need to update 4945 // its foreground state. It is safe to do this after rematching the requests because 4946 // NET_CAPABILITY_FOREGROUND does not affect requests, as is not a requestable 4947 // capability and does not affect the network's score (see the Slog.wtf call above). 4948 updateCapabilities(score, newNetwork, newNetwork.networkCapabilities); 4949 } else { 4950 processListenRequests(newNetwork, false); 4951 } 4952 4953 // do this after the default net is switched, but 4954 // before LegacyTypeTracker sends legacy broadcasts 4955 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4956 4957 // Linger any networks that are no longer needed. This should be done after sending the 4958 // available callback for newNetwork. 4959 for (NetworkAgentInfo nai : affectedNetworks) { 4960 updateLingerState(nai, now); 4961 } 4962 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 4963 // does not need to be done in any particular order. 4964 updateLingerState(newNetwork, now); 4965 4966 if (isNewDefault) { 4967 // Maintain the illusion: since the legacy API only 4968 // understands one network at a time, we must pretend 4969 // that the current default network disconnected before 4970 // the new one connected. 4971 if (oldDefaultNetwork != null) { 4972 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4973 oldDefaultNetwork, true); 4974 } 4975 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4976 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4977 notifyLockdownVpn(newNetwork); 4978 } 4979 4980 if (keep) { 4981 // Notify battery stats service about this network, both the normal 4982 // interface and any stacked links. 4983 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4984 try { 4985 final IBatteryStats bs = BatteryStatsService.getService(); 4986 final int type = newNetwork.networkInfo.getType(); 4987 4988 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4989 bs.noteNetworkInterfaceType(baseIface, type); 4990 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4991 final String stackedIface = stacked.getInterfaceName(); 4992 bs.noteNetworkInterfaceType(stackedIface, type); 4993 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4994 } 4995 } catch (RemoteException ignored) { 4996 } 4997 4998 // This has to happen after the notifyNetworkCallbacks as that tickles each 4999 // ConnectivityManager instance so that legacy requests correctly bind dns 5000 // requests to this network. The legacy users are listening for this bcast 5001 // and will generally do a dns request so they can ensureRouteToHost and if 5002 // they do that before the callbacks happen they'll use the default network. 5003 // 5004 // TODO: Is there still a race here? We send the broadcast 5005 // after sending the callback, but if the app can receive the 5006 // broadcast before the callback, it might still break. 5007 // 5008 // This *does* introduce a race where if the user uses the new api 5009 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 5010 // they may get old info. Reverse this after the old startUsing api is removed. 5011 // This is on top of the multiple intent sequencing referenced in the todo above. 5012 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 5013 NetworkRequest nr = newNetwork.requestAt(i); 5014 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 5015 // legacy type tracker filters out repeat adds 5016 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 5017 } 5018 } 5019 5020 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 5021 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 5022 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 5023 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 5024 if (newNetwork.isVPN()) { 5025 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 5026 } 5027 } 5028 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 5029 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 5030 if (unneeded(nai, UnneededFor.TEARDOWN)) { 5031 if (nai.getLingerExpiry() > 0) { 5032 // This network has active linger timers and no requests, but is not 5033 // lingering. Linger it. 5034 // 5035 // One way (the only way?) this can happen if this network is unvalidated 5036 // and became unneeded due to another network improving its score to the 5037 // point where this network will no longer be able to satisfy any requests 5038 // even if it validates. 5039 updateLingerState(nai, now); 5040 } else { 5041 if (DBG) log("Reaping " + nai.name()); 5042 teardownUnneededNetwork(nai); 5043 } 5044 } 5045 } 5046 } 5047 } 5048 5049 /** 5050 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 5051 * being disconnected. 5052 * @param changed If only one Network's score or capabilities have been modified since the last 5053 * time this function was called, pass this Network in this argument, otherwise pass 5054 * null. 5055 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 5056 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 5057 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 5058 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 5059 * network's score. 5060 */ 5061 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 5062 // TODO: This may get slow. The "changed" parameter is provided for future optimization 5063 // to avoid the slowness. It is not simply enough to process just "changed", for 5064 // example in the case where "changed"'s score decreases and another network should begin 5065 // satifying a NetworkRequest that "changed" currently satisfies. 5066 5067 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 5068 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 5069 // rematchNetworkAndRequests() handles. 5070 final long now = SystemClock.elapsedRealtime(); 5071 if (changed != null && oldScore < changed.getCurrentScore()) { 5072 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 5073 } else { 5074 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 5075 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 5076 // Rematch higher scoring networks first to prevent requests first matching a lower 5077 // scoring network and then a higher scoring network, which could produce multiple 5078 // callbacks and inadvertently unlinger networks. 5079 Arrays.sort(nais); 5080 for (NetworkAgentInfo nai : nais) { 5081 rematchNetworkAndRequests(nai, 5082 // Only reap the last time through the loop. Reaping before all rematching 5083 // is complete could incorrectly teardown a network that hasn't yet been 5084 // rematched. 5085 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 5086 : ReapUnvalidatedNetworks.REAP, 5087 now); 5088 } 5089 } 5090 } 5091 5092 private void updateInetCondition(NetworkAgentInfo nai) { 5093 // Don't bother updating until we've graduated to validated at least once. 5094 if (!nai.everValidated) return; 5095 // For now only update icons for default connection. 5096 // TODO: Update WiFi and cellular icons separately. b/17237507 5097 if (!isDefaultNetwork(nai)) return; 5098 5099 int newInetCondition = nai.lastValidated ? 100 : 0; 5100 // Don't repeat publish. 5101 if (newInetCondition == mDefaultInetConditionPublished) return; 5102 5103 mDefaultInetConditionPublished = newInetCondition; 5104 sendInetConditionBroadcast(nai.networkInfo); 5105 } 5106 5107 private void notifyLockdownVpn(NetworkAgentInfo nai) { 5108 if (mLockdownTracker != null) { 5109 if (nai != null && nai.isVPN()) { 5110 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 5111 } else { 5112 mLockdownTracker.onNetworkInfoChanged(); 5113 } 5114 } 5115 } 5116 5117 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 5118 NetworkInfo.State state = newInfo.getState(); 5119 NetworkInfo oldInfo = null; 5120 final int oldScore = networkAgent.getCurrentScore(); 5121 synchronized (networkAgent) { 5122 oldInfo = networkAgent.networkInfo; 5123 networkAgent.networkInfo = newInfo; 5124 } 5125 notifyLockdownVpn(networkAgent); 5126 5127 if (oldInfo != null && oldInfo.getState() == state) { 5128 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 5129 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 5130 notifyIfacesChangedForNetworkStats(); 5131 } else if (VDBG) log("ignoring duplicate network state non-change"); 5132 // In either case, no further work should be needed. 5133 return; 5134 } 5135 if (DBG) { 5136 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 5137 (oldInfo == null ? "null" : oldInfo.getState()) + 5138 " to " + state); 5139 } 5140 5141 if (!networkAgent.created 5142 && (state == NetworkInfo.State.CONNECTED 5143 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 5144 5145 // A network that has just connected has zero requests and is thus a foreground network. 5146 networkAgent.networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 5147 5148 try { 5149 // This should never fail. Specifying an already in use NetID will cause failure. 5150 if (networkAgent.isVPN()) { 5151 mNetd.createVirtualNetwork(networkAgent.network.netId, 5152 !networkAgent.linkProperties.getDnsServers().isEmpty(), 5153 (networkAgent.networkMisc == null || 5154 !networkAgent.networkMisc.allowBypass)); 5155 } else { 5156 mNetd.createPhysicalNetwork(networkAgent.network.netId, 5157 networkAgent.networkCapabilities.hasCapability( 5158 NET_CAPABILITY_NOT_RESTRICTED) ? 5159 null : NetworkManagementService.PERMISSION_SYSTEM); 5160 } 5161 } catch (Exception e) { 5162 loge("Error creating network " + networkAgent.network.netId + ": " 5163 + e.getMessage()); 5164 return; 5165 } 5166 networkAgent.created = true; 5167 } 5168 5169 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 5170 networkAgent.everConnected = true; 5171 5172 updateLinkProperties(networkAgent, null); 5173 notifyIfacesChangedForNetworkStats(); 5174 5175 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 5176 scheduleUnvalidatedPrompt(networkAgent); 5177 5178 if (networkAgent.isVPN()) { 5179 // Temporarily disable the default proxy (not global). 5180 synchronized (mProxyLock) { 5181 if (!mDefaultProxyDisabled) { 5182 mDefaultProxyDisabled = true; 5183 if (mGlobalProxy == null && mDefaultProxy != null) { 5184 sendProxyBroadcast(null); 5185 } 5186 } 5187 } 5188 // TODO: support proxy per network. 5189 } 5190 5191 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5192 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5193 // capabilities, so it only needs to be done once on initial connect, not every time the 5194 // network's capabilities change. Note that we do this before rematching the network, 5195 // so we could decide to tear it down immediately afterwards. That's fine though - on 5196 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5197 // doing. 5198 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5199 5200 // Consider network even though it is not yet validated. 5201 final long now = SystemClock.elapsedRealtime(); 5202 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5203 5204 // This has to happen after matching the requests, because callbacks are just requests. 5205 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5206 } else if (state == NetworkInfo.State.DISCONNECTED) { 5207 networkAgent.asyncChannel.disconnect(); 5208 if (networkAgent.isVPN()) { 5209 synchronized (mProxyLock) { 5210 if (mDefaultProxyDisabled) { 5211 mDefaultProxyDisabled = false; 5212 if (mGlobalProxy == null && mDefaultProxy != null) { 5213 sendProxyBroadcast(mDefaultProxy); 5214 } 5215 } 5216 } 5217 } 5218 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5219 state == NetworkInfo.State.SUSPENDED) { 5220 // going into or coming out of SUSPEND: rescore and notify 5221 if (networkAgent.getCurrentScore() != oldScore) { 5222 rematchAllNetworksAndRequests(networkAgent, oldScore); 5223 } 5224 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5225 ConnectivityManager.CALLBACK_SUSPENDED : 5226 ConnectivityManager.CALLBACK_RESUMED)); 5227 mLegacyTypeTracker.update(networkAgent); 5228 } 5229 } 5230 5231 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5232 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5233 if (score < 0) { 5234 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5235 "). Bumping score to min of 0"); 5236 score = 0; 5237 } 5238 5239 final int oldScore = nai.getCurrentScore(); 5240 nai.setCurrentScore(score); 5241 5242 rematchAllNetworksAndRequests(nai, oldScore); 5243 5244 sendUpdatedScoreToFactories(nai); 5245 } 5246 5247 // notify only this one new request of the current state 5248 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5249 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 5250 if (nri.mPendingIntent == null) { 5251 callCallbackForRequest(nri, nai, notifyType, 0); 5252 } else { 5253 sendPendingIntentForRequest(nri, nai, notifyType); 5254 } 5255 } 5256 5257 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5258 // The NetworkInfo we actually send out has no bearing on the real 5259 // state of affairs. For example, if the default connection is mobile, 5260 // and a request for HIPRI has just gone away, we need to pretend that 5261 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5262 // the state to DISCONNECTED, even though the network is of type MOBILE 5263 // and is still connected. 5264 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5265 info.setType(type); 5266 if (state != DetailedState.DISCONNECTED) { 5267 info.setDetailedState(state, null, info.getExtraInfo()); 5268 sendConnectedBroadcast(info); 5269 } else { 5270 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5271 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5272 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5273 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5274 if (info.isFailover()) { 5275 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5276 nai.networkInfo.setFailover(false); 5277 } 5278 if (info.getReason() != null) { 5279 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5280 } 5281 if (info.getExtraInfo() != null) { 5282 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5283 } 5284 NetworkAgentInfo newDefaultAgent = null; 5285 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5286 newDefaultAgent = getDefaultNetwork(); 5287 if (newDefaultAgent != null) { 5288 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5289 newDefaultAgent.networkInfo); 5290 } else { 5291 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5292 } 5293 } 5294 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5295 mDefaultInetConditionPublished); 5296 sendStickyBroadcast(intent); 5297 if (newDefaultAgent != null) { 5298 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5299 } 5300 } 5301 } 5302 5303 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5304 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5305 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5306 NetworkRequest nr = networkAgent.requestAt(i); 5307 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5308 if (VDBG) log(" sending notification for " + nr); 5309 // TODO: if we're in the middle of a rematch, can we send a CAP_CHANGED callback for 5310 // a network that no longer satisfies the listen? 5311 if (nri.mPendingIntent == null) { 5312 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5313 } else { 5314 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5315 } 5316 } 5317 } 5318 5319 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5320 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5321 } 5322 5323 private String notifyTypeToName(int notifyType) { 5324 switch (notifyType) { 5325 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5326 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5327 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5328 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5329 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5330 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5331 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5332 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5333 } 5334 return "UNKNOWN"; 5335 } 5336 5337 /** 5338 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5339 * properties tracked by NetworkStatsService on an active iface has changed. 5340 */ 5341 private void notifyIfacesChangedForNetworkStats() { 5342 try { 5343 mStatsService.forceUpdateIfaces(); 5344 } catch (Exception ignored) { 5345 } 5346 } 5347 5348 @Override 5349 public boolean addVpnAddress(String address, int prefixLength) { 5350 throwIfLockdownEnabled(); 5351 int user = UserHandle.getUserId(Binder.getCallingUid()); 5352 synchronized (mVpns) { 5353 return mVpns.get(user).addAddress(address, prefixLength); 5354 } 5355 } 5356 5357 @Override 5358 public boolean removeVpnAddress(String address, int prefixLength) { 5359 throwIfLockdownEnabled(); 5360 int user = UserHandle.getUserId(Binder.getCallingUid()); 5361 synchronized (mVpns) { 5362 return mVpns.get(user).removeAddress(address, prefixLength); 5363 } 5364 } 5365 5366 @Override 5367 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5368 throwIfLockdownEnabled(); 5369 int user = UserHandle.getUserId(Binder.getCallingUid()); 5370 boolean success; 5371 synchronized (mVpns) { 5372 success = mVpns.get(user).setUnderlyingNetworks(networks); 5373 } 5374 if (success) { 5375 notifyIfacesChangedForNetworkStats(); 5376 } 5377 return success; 5378 } 5379 5380 @Override 5381 public String getCaptivePortalServerUrl() { 5382 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5383 } 5384 5385 @Override 5386 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5387 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5388 enforceKeepalivePermission(); 5389 mKeepaliveTracker.startNattKeepalive( 5390 getNetworkAgentInfoForNetwork(network), 5391 intervalSeconds, messenger, binder, 5392 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5393 } 5394 5395 @Override 5396 public void stopKeepalive(Network network, int slot) { 5397 mHandler.sendMessage(mHandler.obtainMessage( 5398 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5399 } 5400 5401 @Override 5402 public void factoryReset() { 5403 enforceConnectivityInternalPermission(); 5404 5405 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5406 return; 5407 } 5408 5409 final int userId = UserHandle.getCallingUserId(); 5410 5411 // Turn airplane mode off 5412 setAirplaneMode(false); 5413 5414 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5415 // Untether 5416 for (String tether : getTetheredIfaces()) { 5417 untether(tether); 5418 } 5419 } 5420 5421 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5422 // Remove always-on package 5423 synchronized (mVpns) { 5424 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5425 if (alwaysOnPackage != null) { 5426 setAlwaysOnVpnPackage(userId, null, false); 5427 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5428 } 5429 } 5430 5431 // Turn VPN off 5432 VpnConfig vpnConfig = getVpnConfig(userId); 5433 if (vpnConfig != null) { 5434 if (vpnConfig.legacy) { 5435 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5436 } else { 5437 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5438 // in the future without user intervention. 5439 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5440 5441 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5442 } 5443 } 5444 } 5445 5446 Settings.Global.putString(mContext.getContentResolver(), 5447 Settings.Global.NETWORK_AVOID_BAD_WIFI, null); 5448 } 5449 5450 @VisibleForTesting 5451 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5452 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5453 return new NetworkMonitor(context, handler, nai, defaultRequest); 5454 } 5455 5456 @VisibleForTesting 5457 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5458 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5459 } 5460 5461 private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5462 int newNetid = NETID_UNSET; 5463 int prevNetid = NETID_UNSET; 5464 int[] transports = new int[0]; 5465 boolean hadIPv4 = false; 5466 boolean hadIPv6 = false; 5467 5468 if (newNai != null) { 5469 newNetid = newNai.network.netId; 5470 transports = newNai.networkCapabilities.getTransportTypes(); 5471 } 5472 if (prevNai != null) { 5473 prevNetid = prevNai.network.netId; 5474 final LinkProperties lp = prevNai.linkProperties; 5475 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5476 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5477 } 5478 5479 mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); 5480 } 5481 5482 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5483 mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); 5484 } 5485} 5486