ConnectivityService.java revision f9fdf87af2fe0cb9b70ffa81a0912448f4ef4207
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_INTERNET; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 31import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 32import static android.net.NetworkPolicyManager.RULE_ALLOW_METERED; 33import static android.net.NetworkPolicyManager.RULE_NONE; 34import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 35import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 36import static android.net.NetworkPolicyManager.RULE_TEMPORARY_ALLOW_METERED; 37import static android.net.NetworkPolicyManager.uidRulesToString; 38 39import android.annotation.Nullable; 40import android.app.BroadcastOptions; 41import android.app.Notification; 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.NetworkAgentInfo; 136import com.android.server.connectivity.NetworkDiagnostics; 137import com.android.server.connectivity.NetworkMonitor; 138import com.android.server.connectivity.PacManager; 139import com.android.server.connectivity.PermissionMonitor; 140import com.android.server.connectivity.Tethering; 141import com.android.server.connectivity.Vpn; 142import com.android.server.net.BaseNetworkObserver; 143import com.android.server.net.LockdownVpnTracker; 144 145import com.google.android.collect.Lists; 146 147import org.xmlpull.v1.XmlPullParser; 148import org.xmlpull.v1.XmlPullParserException; 149 150import java.io.File; 151import java.io.FileDescriptor; 152import java.io.FileNotFoundException; 153import java.io.FileReader; 154import java.io.IOException; 155import java.io.PrintWriter; 156import java.net.Inet4Address; 157import java.net.InetAddress; 158import java.net.UnknownHostException; 159import java.util.ArrayDeque; 160import java.util.ArrayList; 161import java.util.Arrays; 162import java.util.Collection; 163import java.util.HashMap; 164import java.util.HashSet; 165import java.util.List; 166import java.util.Map; 167import java.util.Objects; 168import java.util.SortedSet; 169import java.util.TreeSet; 170 171/** 172 * @hide 173 */ 174public class ConnectivityService extends IConnectivityManager.Stub 175 implements PendingIntent.OnFinished { 176 private static final String TAG = ConnectivityService.class.getSimpleName(); 177 178 private static final boolean DBG = true; 179 private static final boolean VDBG = false; 180 181 private static final boolean LOGD_RULES = false; 182 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 183 184 // TODO: create better separation between radio types and network types 185 186 // how long to wait before switching back to a radio's default network 187 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 188 // system property that can override the above value 189 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 190 "android.telephony.apn-restore"; 191 192 // How long to wait before putting up a "This network doesn't have an Internet connection, 193 // connect anyway?" dialog after the user selects a network that doesn't validate. 194 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 195 196 // Default to 30s linger time-out. Modifiable only for testing. 197 private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; 198 private static final int DEFAULT_LINGER_DELAY_MS = 30_000; 199 @VisibleForTesting 200 protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it. 201 202 // How long to delay to removal of a pending intent based request. 203 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 204 private final int mReleasePendingIntentDelayMs; 205 206 private Tethering mTethering; 207 208 private final PermissionMonitor mPermissionMonitor; 209 210 private KeyStore mKeyStore; 211 212 @GuardedBy("mVpns") 213 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 214 215 private boolean mLockdownEnabled; 216 private LockdownVpnTracker mLockdownTracker; 217 218 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 219 private Object mRulesLock = new Object(); 220 /** Currently active network rules by UID. */ 221 @GuardedBy("mRulesLock") 222 private SparseIntArray mUidRules = new SparseIntArray(); 223 /** Set of ifaces that are costly. */ 224 @GuardedBy("mRulesLock") 225 private ArraySet<String> mMeteredIfaces = new ArraySet<>(); 226 /** Flag indicating if background data is restricted. */ 227 @GuardedBy("mRulesLock") 228 private boolean mRestrictBackground; 229 230 final private Context mContext; 231 private int mNetworkPreference; 232 // 0 is full bad, 100 is full good 233 private int mDefaultInetConditionPublished = 0; 234 235 private int mNumDnsEntries; 236 237 private boolean mTestMode; 238 private static ConnectivityService sServiceInstance; 239 240 private INetworkManagementService mNetd; 241 private INetworkStatsService mStatsService; 242 private INetworkPolicyManager mPolicyManager; 243 244 private String mCurrentTcpBufferSizes; 245 246 private static final int ENABLED = 1; 247 private static final int DISABLED = 0; 248 249 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 250 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class, 251 NetworkAgentInfo.class }); 252 253 private enum ReapUnvalidatedNetworks { 254 // Tear down networks that have no chance (e.g. even if validated) of becoming 255 // the highest scoring network satisfying a NetworkRequest. This should be passed when 256 // all networks have been rematched against all NetworkRequests. 257 REAP, 258 // Don't reap networks. This should be passed when some networks have not yet been 259 // rematched against all NetworkRequests. 260 DONT_REAP 261 }; 262 263 /** 264 * used internally to change our mobile data enabled flag 265 */ 266 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 267 268 /** 269 * used internally to clear a wakelock when transitioning 270 * from one net to another. Clear happens when we get a new 271 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 272 * after a timeout if no network is found (typically 1 min). 273 */ 274 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 275 276 /** 277 * used internally to reload global proxy settings 278 */ 279 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 280 281 /** 282 * PAC manager has received new port. 283 */ 284 private static final int EVENT_PROXY_HAS_CHANGED = 16; 285 286 /** 287 * used internally when registering NetworkFactories 288 * obj = NetworkFactoryInfo 289 */ 290 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 291 292 /** 293 * used internally when registering NetworkAgents 294 * obj = Messenger 295 */ 296 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 297 298 /** 299 * used to add a network request 300 * includes a NetworkRequestInfo 301 */ 302 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 303 304 /** 305 * indicates a timeout period is over - check if we had a network yet or not 306 * and if not, call the timeout callback (but leave the request live until they 307 * cancel it. 308 * includes a NetworkRequestInfo 309 */ 310 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 311 312 /** 313 * used to add a network listener - no request 314 * includes a NetworkRequestInfo 315 */ 316 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 317 318 /** 319 * used to remove a network request, either a listener or a real request 320 * arg1 = UID of caller 321 * obj = NetworkRequest 322 */ 323 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 324 325 /** 326 * used internally when registering NetworkFactories 327 * obj = Messenger 328 */ 329 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 330 331 /** 332 * used internally to expire a wakelock when transitioning 333 * from one net to another. Expire happens when we fail to find 334 * a new network (typically after 1 minute) - 335 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 336 * a replacement network. 337 */ 338 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 339 340 /** 341 * Used internally to indicate the system is ready. 342 */ 343 private static final int EVENT_SYSTEM_READY = 25; 344 345 /** 346 * used to add a network request with a pending intent 347 * obj = NetworkRequestInfo 348 */ 349 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 350 351 /** 352 * used to remove a pending intent and its associated network request. 353 * arg1 = UID of caller 354 * obj = PendingIntent 355 */ 356 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 357 358 /** 359 * used to specify whether a network should be used even if unvalidated. 360 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 361 * arg2 = whether to remember this choice in the future (1 or 0) 362 * obj = network 363 */ 364 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 365 366 /** 367 * used to ask the user to confirm a connection to an unvalidated network. 368 * obj = network 369 */ 370 private static final int EVENT_PROMPT_UNVALIDATED = 29; 371 372 /** 373 * used internally to (re)configure mobile data always-on settings. 374 */ 375 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 376 377 /** 378 * used to add a network listener with a pending intent 379 * obj = NetworkRequestInfo 380 */ 381 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 382 383 /** 384 * Indicates a caller has requested to have its callback invoked with 385 * the latest LinkProperties or NetworkCapabilities. 386 * 387 * arg1 = UID of caller 388 * obj = NetworkRequest 389 */ 390 private static final int EVENT_REQUEST_LINKPROPERTIES = 32; 391 private static final int EVENT_REQUEST_NETCAPABILITIES = 33; 392 393 /** Handler thread used for both of the handlers below. */ 394 @VisibleForTesting 395 protected final HandlerThread mHandlerThread; 396 /** Handler used for internal events. */ 397 final private InternalHandler mHandler; 398 /** Handler used for incoming {@link NetworkStateTracker} events. */ 399 final private NetworkStateTrackerHandler mTrackerHandler; 400 401 private boolean mSystemReady; 402 private Intent mInitialBroadcast; 403 404 private PowerManager.WakeLock mNetTransitionWakeLock; 405 private String mNetTransitionWakeLockCausedBy = ""; 406 private int mNetTransitionWakeLockSerialNumber; 407 private int mNetTransitionWakeLockTimeout; 408 private final PowerManager.WakeLock mPendingIntentWakeLock; 409 410 // used in DBG mode to track inet condition reports 411 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 412 private ArrayList mInetLog; 413 414 // track the current default http proxy - tell the world if we get a new one (real change) 415 private volatile ProxyInfo mDefaultProxy = null; 416 private Object mProxyLock = new Object(); 417 private boolean mDefaultProxyDisabled = false; 418 419 // track the global proxy. 420 private ProxyInfo mGlobalProxy = null; 421 422 private PacManager mPacManager = null; 423 424 final private SettingsObserver mSettingsObserver; 425 426 private UserManager mUserManager; 427 428 NetworkConfig[] mNetConfigs; 429 int mNetworksDefined; 430 431 // the set of network types that can only be enabled by system/sig apps 432 List mProtectedNetworks; 433 434 private DataConnectionStats mDataConnectionStats; 435 436 TelephonyManager mTelephonyManager; 437 438 private KeepaliveTracker mKeepaliveTracker; 439 440 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 441 private final static int MIN_NET_ID = 100; // some reserved marks 442 private final static int MAX_NET_ID = 65535; 443 private int mNextNetId = MIN_NET_ID; 444 445 // sequence number of NetworkRequests 446 private int mNextNetworkRequestId = 1; 447 448 // NetworkRequest activity String log entries. 449 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 450 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 451 452 // NetworkInfo blocked and unblocked String log entries 453 // TODO: consider reducing memory usage. Each log line is ~40 2B chars, for a total of ~8kB. 454 private static final int MAX_NETWORK_INFO_LOGS = 100; 455 private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); 456 457 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 458 private static final int MAX_VALIDATION_LOGS = 10; 459 private static class ValidationLog { 460 final Network mNetwork; 461 final String mNetworkExtraInfo; 462 final ReadOnlyLocalLog mLog; 463 464 ValidationLog(Network network, String networkExtraInfo, ReadOnlyLocalLog log) { 465 mNetwork = network; 466 mNetworkExtraInfo = networkExtraInfo; 467 mLog = log; 468 } 469 } 470 private final ArrayDeque<ValidationLog> mValidationLogs = 471 new ArrayDeque<ValidationLog>(MAX_VALIDATION_LOGS); 472 473 private void addValidationLogs(ReadOnlyLocalLog log, Network network, String networkExtraInfo) { 474 synchronized(mValidationLogs) { 475 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 476 mValidationLogs.removeLast(); 477 } 478 mValidationLogs.addFirst(new ValidationLog(network, networkExtraInfo, log)); 479 } 480 } 481 482 private final IpConnectivityLog mMetricsLog; 483 484 /** 485 * Implements support for the legacy "one network per network type" model. 486 * 487 * We used to have a static array of NetworkStateTrackers, one for each 488 * network type, but that doesn't work any more now that we can have, 489 * for example, more that one wifi network. This class stores all the 490 * NetworkAgentInfo objects that support a given type, but the legacy 491 * API will only see the first one. 492 * 493 * It serves two main purposes: 494 * 495 * 1. Provide information about "the network for a given type" (since this 496 * API only supports one). 497 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 498 * the first network for a given type changes, or if the default network 499 * changes. 500 */ 501 private class LegacyTypeTracker { 502 503 private static final boolean DBG = true; 504 private static final boolean VDBG = false; 505 506 /** 507 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 508 * Each list holds references to all NetworkAgentInfos that are used to 509 * satisfy requests for that network type. 510 * 511 * This array is built out at startup such that an unsupported network 512 * doesn't get an ArrayList instance, making this a tristate: 513 * unsupported, supported but not active and active. 514 * 515 * The actual lists are populated when we scan the network types that 516 * are supported on this device. 517 * 518 * Threading model: 519 * - addSupportedType() is only called in the constructor 520 * - add(), update(), remove() are only called from the ConnectivityService handler thread. 521 * They are therefore not thread-safe with respect to each other. 522 * - getNetworkForType() can be called at any time on binder threads. It is synchronized 523 * on mTypeLists to be thread-safe with respect to a concurrent remove call. 524 * - dump is thread-safe with respect to concurrent add and remove calls. 525 */ 526 private final ArrayList<NetworkAgentInfo> mTypeLists[]; 527 528 public LegacyTypeTracker() { 529 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 530 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 531 } 532 533 public void addSupportedType(int type) { 534 if (mTypeLists[type] != null) { 535 throw new IllegalStateException( 536 "legacy list for type " + type + "already initialized"); 537 } 538 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 539 } 540 541 public boolean isTypeSupported(int type) { 542 return isNetworkTypeValid(type) && mTypeLists[type] != null; 543 } 544 545 public NetworkAgentInfo getNetworkForType(int type) { 546 synchronized (mTypeLists) { 547 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 548 return mTypeLists[type].get(0); 549 } 550 } 551 return null; 552 } 553 554 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 555 boolean isDefaultNetwork) { 556 if (DBG) { 557 log("Sending " + state + 558 " broadcast for type " + type + " " + nai.name() + 559 " isDefaultNetwork=" + isDefaultNetwork); 560 } 561 } 562 563 /** Adds the given network to the specified legacy type list. */ 564 public void add(int type, NetworkAgentInfo nai) { 565 if (!isTypeSupported(type)) { 566 return; // Invalid network type. 567 } 568 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 569 570 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 571 if (list.contains(nai)) { 572 return; 573 } 574 synchronized (mTypeLists) { 575 list.add(nai); 576 } 577 578 // Send a broadcast if this is the first network of its type or if it's the default. 579 final boolean isDefaultNetwork = isDefaultNetwork(nai); 580 if ((list.size() == 1) || isDefaultNetwork) { 581 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 582 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 583 } 584 } 585 586 /** Removes the given network from the specified legacy type list. */ 587 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 588 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 589 if (list == null || list.isEmpty()) { 590 return; 591 } 592 final boolean wasFirstNetwork = list.get(0).equals(nai); 593 594 synchronized (mTypeLists) { 595 if (!list.remove(nai)) { 596 return; 597 } 598 } 599 600 final DetailedState state = DetailedState.DISCONNECTED; 601 602 if (wasFirstNetwork || wasDefault) { 603 maybeLogBroadcast(nai, state, type, wasDefault); 604 sendLegacyNetworkBroadcast(nai, state, type); 605 } 606 607 if (!list.isEmpty() && wasFirstNetwork) { 608 if (DBG) log("Other network available for type " + type + 609 ", sending connected broadcast"); 610 final NetworkAgentInfo replacement = list.get(0); 611 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 612 sendLegacyNetworkBroadcast(replacement, state, type); 613 } 614 } 615 616 /** Removes the given network from all legacy type lists. */ 617 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 618 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 619 for (int type = 0; type < mTypeLists.length; type++) { 620 remove(type, nai, wasDefault); 621 } 622 } 623 624 // send out another legacy broadcast - currently only used for suspend/unsuspend 625 // toggle 626 public void update(NetworkAgentInfo nai) { 627 final boolean isDefault = isDefaultNetwork(nai); 628 final DetailedState state = nai.networkInfo.getDetailedState(); 629 for (int type = 0; type < mTypeLists.length; type++) { 630 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 631 final boolean contains = (list != null && list.contains(nai)); 632 final boolean isFirst = contains && (nai == list.get(0)); 633 if (isFirst || contains && isDefault) { 634 maybeLogBroadcast(nai, state, type, isDefault); 635 sendLegacyNetworkBroadcast(nai, state, type); 636 } 637 } 638 } 639 640 private String naiToString(NetworkAgentInfo nai) { 641 String name = (nai != null) ? nai.name() : "null"; 642 String state = (nai.networkInfo != null) ? 643 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 644 "???/???"; 645 return name + " " + state; 646 } 647 648 public void dump(IndentingPrintWriter pw) { 649 pw.println("mLegacyTypeTracker:"); 650 pw.increaseIndent(); 651 pw.print("Supported types:"); 652 for (int type = 0; type < mTypeLists.length; type++) { 653 if (mTypeLists[type] != null) pw.print(" " + type); 654 } 655 pw.println(); 656 pw.println("Current state:"); 657 pw.increaseIndent(); 658 synchronized (mTypeLists) { 659 for (int type = 0; type < mTypeLists.length; type++) { 660 if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; 661 for (NetworkAgentInfo nai : mTypeLists[type]) { 662 pw.println(type + " " + naiToString(nai)); 663 } 664 } 665 } 666 pw.decreaseIndent(); 667 pw.decreaseIndent(); 668 pw.println(); 669 } 670 } 671 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 672 673 @VisibleForTesting 674 protected HandlerThread createHandlerThread() { 675 return new HandlerThread("ConnectivityServiceThread"); 676 } 677 678 public ConnectivityService(Context context, INetworkManagementService netManager, 679 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 680 this(context, netManager, statsService, policyManager, new IpConnectivityLog()); 681 } 682 683 @VisibleForTesting 684 protected ConnectivityService(Context context, INetworkManagementService netManager, 685 INetworkStatsService statsService, INetworkPolicyManager policyManager, 686 IpConnectivityLog logger) { 687 if (DBG) log("ConnectivityService starting up"); 688 689 mMetricsLog = logger; 690 mDefaultRequest = createInternetRequestForTransport(-1); 691 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); 692 mNetworkRequests.put(mDefaultRequest, defaultNRI); 693 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 694 695 mDefaultMobileDataRequest = createInternetRequestForTransport( 696 NetworkCapabilities.TRANSPORT_CELLULAR); 697 698 mHandlerThread = createHandlerThread(); 699 mHandlerThread.start(); 700 mHandler = new InternalHandler(mHandlerThread.getLooper()); 701 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 702 703 // setup our unique device name 704 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 705 String id = Settings.Secure.getString(context.getContentResolver(), 706 Settings.Secure.ANDROID_ID); 707 if (id != null && id.length() > 0) { 708 String name = new String("android-").concat(id); 709 SystemProperties.set("net.hostname", name); 710 } 711 } 712 713 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 714 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 715 716 mLingerDelayMs = SystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); 717 718 mContext = checkNotNull(context, "missing Context"); 719 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 720 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 721 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 722 mKeyStore = KeyStore.getInstance(); 723 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 724 725 try { 726 mPolicyManager.setConnectivityListener(mPolicyListener); 727 mRestrictBackground = mPolicyManager.getRestrictBackground(); 728 } catch (RemoteException e) { 729 // ouch, no rules updates means some processes may never get network 730 loge("unable to register INetworkPolicyListener" + e); 731 } 732 733 final PowerManager powerManager = (PowerManager) context.getSystemService( 734 Context.POWER_SERVICE); 735 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 736 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 737 com.android.internal.R.integer.config_networkTransitionTimeout); 738 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 739 740 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 741 742 // TODO: What is the "correct" way to do determine if this is a wifi only device? 743 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 744 log("wifiOnly=" + wifiOnly); 745 String[] naStrings = context.getResources().getStringArray( 746 com.android.internal.R.array.networkAttributes); 747 for (String naString : naStrings) { 748 try { 749 NetworkConfig n = new NetworkConfig(naString); 750 if (VDBG) log("naString=" + naString + " config=" + n); 751 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 752 loge("Error in networkAttributes - ignoring attempt to define type " + 753 n.type); 754 continue; 755 } 756 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 757 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 758 n.type); 759 continue; 760 } 761 if (mNetConfigs[n.type] != null) { 762 loge("Error in networkAttributes - ignoring attempt to redefine type " + 763 n.type); 764 continue; 765 } 766 mLegacyTypeTracker.addSupportedType(n.type); 767 768 mNetConfigs[n.type] = n; 769 mNetworksDefined++; 770 } catch(Exception e) { 771 // ignore it - leave the entry null 772 } 773 } 774 775 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 776 if (mNetConfigs[TYPE_VPN] == null) { 777 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 778 // don't need to add TYPE_VPN to mNetConfigs. 779 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 780 mNetworksDefined++; // used only in the log() statement below. 781 } 782 783 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 784 785 mProtectedNetworks = new ArrayList<Integer>(); 786 int[] protectedNetworks = context.getResources().getIntArray( 787 com.android.internal.R.array.config_protectedNetworks); 788 for (int p : protectedNetworks) { 789 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 790 mProtectedNetworks.add(p); 791 } else { 792 if (DBG) loge("Ignoring protectedNetwork " + p); 793 } 794 } 795 796 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 797 && SystemProperties.get("ro.build.type").equals("eng"); 798 799 mTethering = new Tethering(mContext, mNetd, statsService); 800 801 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 802 803 //set up the listener for user state for creating user VPNs 804 IntentFilter intentFilter = new IntentFilter(); 805 intentFilter.addAction(Intent.ACTION_USER_STARTED); 806 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 807 intentFilter.addAction(Intent.ACTION_USER_ADDED); 808 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 809 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 810 mContext.registerReceiverAsUser( 811 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 812 813 try { 814 mNetd.registerObserver(mTethering); 815 mNetd.registerObserver(mDataActivityObserver); 816 } catch (RemoteException e) { 817 loge("Error registering observer :" + e); 818 } 819 820 if (DBG) { 821 mInetLog = new ArrayList(); 822 } 823 824 mSettingsObserver = new SettingsObserver(mContext, mHandler); 825 registerSettingsCallbacks(); 826 827 mDataConnectionStats = new DataConnectionStats(mContext); 828 mDataConnectionStats.startMonitoring(); 829 830 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 831 832 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 833 834 mKeepaliveTracker = new KeepaliveTracker(mHandler); 835 } 836 837 private NetworkRequest createInternetRequestForTransport(int transportType) { 838 NetworkCapabilities netCap = new NetworkCapabilities(); 839 netCap.addCapability(NET_CAPABILITY_INTERNET); 840 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 841 if (transportType > -1) { 842 netCap.addTransportType(transportType); 843 } 844 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), 845 NetworkRequest.Type.REQUEST); 846 } 847 848 // Used only for testing. 849 // TODO: Delete this and either: 850 // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires 851 // changing ContentResolver to make registerContentObserver non-final). 852 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 853 // by subclassing SettingsObserver. 854 @VisibleForTesting 855 void updateMobileDataAlwaysOn() { 856 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 857 } 858 859 private void handleMobileDataAlwaysOn() { 860 final boolean enable = (Settings.Global.getInt( 861 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 862 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 863 if (enable == isEnabled) { 864 return; // Nothing to do. 865 } 866 867 if (enable) { 868 handleRegisterNetworkRequest(new NetworkRequestInfo( 869 null, mDefaultMobileDataRequest, new Binder())); 870 } else { 871 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 872 } 873 } 874 875 private void registerSettingsCallbacks() { 876 // Watch for global HTTP proxy changes. 877 mSettingsObserver.observe( 878 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 879 EVENT_APPLY_GLOBAL_HTTP_PROXY); 880 881 // Watch for whether or not to keep mobile data always on. 882 mSettingsObserver.observe( 883 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 884 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 885 } 886 887 private synchronized int nextNetworkRequestId() { 888 return mNextNetworkRequestId++; 889 } 890 891 @VisibleForTesting 892 protected int reserveNetId() { 893 synchronized (mNetworkForNetId) { 894 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 895 int netId = mNextNetId; 896 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 897 // Make sure NetID unused. http://b/16815182 898 if (!mNetIdInUse.get(netId)) { 899 mNetIdInUse.put(netId, true); 900 return netId; 901 } 902 } 903 } 904 throw new IllegalStateException("No free netIds"); 905 } 906 907 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 908 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 909 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 910 final NetworkState state; 911 if (nai != null) { 912 state = nai.getNetworkState(); 913 state.networkInfo.setType(networkType); 914 } else { 915 final NetworkInfo info = new NetworkInfo(networkType, 0, 916 getNetworkTypeName(networkType), ""); 917 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 918 info.setIsAvailable(true); 919 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 920 null, null, null); 921 } 922 filterNetworkStateForUid(state, uid, ignoreBlocked); 923 return state; 924 } else { 925 return NetworkState.EMPTY; 926 } 927 } 928 929 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 930 if (network == null) { 931 return null; 932 } 933 synchronized (mNetworkForNetId) { 934 return mNetworkForNetId.get(network.netId); 935 } 936 } 937 938 private Network[] getVpnUnderlyingNetworks(int uid) { 939 if (!mLockdownEnabled) { 940 int user = UserHandle.getUserId(uid); 941 synchronized (mVpns) { 942 Vpn vpn = mVpns.get(user); 943 if (vpn != null && vpn.appliesToUid(uid)) { 944 return vpn.getUnderlyingNetworks(); 945 } 946 } 947 } 948 return null; 949 } 950 951 private NetworkState getUnfilteredActiveNetworkState(int uid) { 952 NetworkAgentInfo nai = getDefaultNetwork(); 953 954 final Network[] networks = getVpnUnderlyingNetworks(uid); 955 if (networks != null) { 956 // getUnderlyingNetworks() returns: 957 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 958 // empty array => the VPN explicitly said "no default network". 959 // non-empty array => the VPN specified one or more default networks; we use the 960 // first one. 961 if (networks.length > 0) { 962 nai = getNetworkAgentInfoForNetwork(networks[0]); 963 } else { 964 nai = null; 965 } 966 } 967 968 if (nai != null) { 969 return nai.getNetworkState(); 970 } else { 971 return NetworkState.EMPTY; 972 } 973 } 974 975 /** 976 * Check if UID should be blocked from using the network with the given LinkProperties. 977 */ 978 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 979 boolean ignoreBlocked) { 980 // Networks aren't blocked when ignoring blocked status 981 if (ignoreBlocked) return false; 982 // Networks are never blocked for system services 983 if (isSystem(uid)) return false; 984 985 final boolean networkMetered; 986 final int uidRules; 987 988 synchronized (mVpns) { 989 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 990 if (vpn != null && vpn.isBlockingUid(uid)) { 991 return true; 992 } 993 } 994 995 final String iface = (lp == null ? "" : lp.getInterfaceName()); 996 synchronized (mRulesLock) { 997 networkMetered = mMeteredIfaces.contains(iface); 998 uidRules = mUidRules.get(uid, RULE_NONE); 999 } 1000 1001 boolean allowed = true; 1002 // Check Data Saver Mode first... 1003 if (networkMetered) { 1004 if ((uidRules & RULE_REJECT_METERED) != 0) { 1005 if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); 1006 // Explicitly blacklisted. 1007 allowed = false; 1008 } else { 1009 allowed = !mRestrictBackground 1010 || (uidRules & RULE_ALLOW_METERED) != 0 1011 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; 1012 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1013 + " mRestrictBackground=" + mRestrictBackground 1014 + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) 1015 + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" 1016 + ": " + allowed); 1017 } 1018 } 1019 // ...then power restrictions. 1020 if (allowed) { 1021 allowed = (uidRules & RULE_REJECT_ALL) == 0; 1022 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1023 + " rule is " + uidRulesToString(uidRules) + ": " + allowed); 1024 } 1025 return !allowed; 1026 } 1027 1028 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1029 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1030 return; 1031 } 1032 boolean removed = false; 1033 boolean added = false; 1034 synchronized (mBlockedAppUids) { 1035 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1036 added = true; 1037 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1038 removed = true; 1039 } 1040 } 1041 if (added) { 1042 log("Returning blocked NetworkInfo to uid=" + uid); 1043 mNetworkInfoBlockingLogs.log("BLOCKED " + uid); 1044 } else if (removed) { 1045 log("Returning unblocked NetworkInfo to uid=" + uid); 1046 mNetworkInfoBlockingLogs.log("UNBLOCKED " + uid); 1047 } 1048 } 1049 1050 /** 1051 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1052 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1053 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 1054 * {@link NetworkInfo#isMetered()} based on network policies. 1055 */ 1056 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1057 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1058 1059 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1060 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1061 } 1062 if (mLockdownTracker != null) { 1063 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1064 } 1065 1066 // TODO: apply metered state closer to NetworkAgentInfo 1067 final long token = Binder.clearCallingIdentity(); 1068 try { 1069 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 1070 } catch (RemoteException e) { 1071 } finally { 1072 Binder.restoreCallingIdentity(token); 1073 } 1074 } 1075 1076 /** 1077 * Return NetworkInfo for the active (i.e., connected) network interface. 1078 * It is assumed that at most one network is active at a time. If more 1079 * than one is active, it is indeterminate which will be returned. 1080 * @return the info for the active network, or {@code null} if none is 1081 * active 1082 */ 1083 @Override 1084 public NetworkInfo getActiveNetworkInfo() { 1085 enforceAccessPermission(); 1086 final int uid = Binder.getCallingUid(); 1087 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1088 filterNetworkStateForUid(state, uid, false); 1089 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1090 return state.networkInfo; 1091 } 1092 1093 @Override 1094 public Network getActiveNetwork() { 1095 enforceAccessPermission(); 1096 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1097 } 1098 1099 @Override 1100 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1101 enforceConnectivityInternalPermission(); 1102 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1103 } 1104 1105 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1106 final int user = UserHandle.getUserId(uid); 1107 int vpnNetId = NETID_UNSET; 1108 synchronized (mVpns) { 1109 final Vpn vpn = mVpns.get(user); 1110 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1111 } 1112 NetworkAgentInfo nai; 1113 if (vpnNetId != NETID_UNSET) { 1114 synchronized (mNetworkForNetId) { 1115 nai = mNetworkForNetId.get(vpnNetId); 1116 } 1117 if (nai != null) return nai.network; 1118 } 1119 nai = getDefaultNetwork(); 1120 if (nai != null 1121 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1122 nai = null; 1123 } 1124 return nai != null ? nai.network : null; 1125 } 1126 1127 // Public because it's used by mLockdownTracker. 1128 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1129 enforceAccessPermission(); 1130 final int uid = Binder.getCallingUid(); 1131 NetworkState state = getUnfilteredActiveNetworkState(uid); 1132 return state.networkInfo; 1133 } 1134 1135 @Override 1136 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1137 enforceConnectivityInternalPermission(); 1138 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1139 filterNetworkStateForUid(state, uid, ignoreBlocked); 1140 return state.networkInfo; 1141 } 1142 1143 @Override 1144 public NetworkInfo getNetworkInfo(int networkType) { 1145 enforceAccessPermission(); 1146 final int uid = Binder.getCallingUid(); 1147 if (getVpnUnderlyingNetworks(uid) != null) { 1148 // A VPN is active, so we may need to return one of its underlying networks. This 1149 // information is not available in LegacyTypeTracker, so we have to get it from 1150 // getUnfilteredActiveNetworkState. 1151 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1152 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1153 filterNetworkStateForUid(state, uid, false); 1154 return state.networkInfo; 1155 } 1156 } 1157 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1158 return state.networkInfo; 1159 } 1160 1161 @Override 1162 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1163 enforceAccessPermission(); 1164 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1165 if (nai != null) { 1166 final NetworkState state = nai.getNetworkState(); 1167 filterNetworkStateForUid(state, uid, ignoreBlocked); 1168 return state.networkInfo; 1169 } else { 1170 return null; 1171 } 1172 } 1173 1174 @Override 1175 public NetworkInfo[] getAllNetworkInfo() { 1176 enforceAccessPermission(); 1177 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1178 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1179 networkType++) { 1180 NetworkInfo info = getNetworkInfo(networkType); 1181 if (info != null) { 1182 result.add(info); 1183 } 1184 } 1185 return result.toArray(new NetworkInfo[result.size()]); 1186 } 1187 1188 @Override 1189 public Network getNetworkForType(int networkType) { 1190 enforceAccessPermission(); 1191 final int uid = Binder.getCallingUid(); 1192 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1193 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1194 return state.network; 1195 } 1196 return null; 1197 } 1198 1199 @Override 1200 public Network[] getAllNetworks() { 1201 enforceAccessPermission(); 1202 synchronized (mNetworkForNetId) { 1203 final Network[] result = new Network[mNetworkForNetId.size()]; 1204 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1205 result[i] = mNetworkForNetId.valueAt(i).network; 1206 } 1207 return result; 1208 } 1209 } 1210 1211 @Override 1212 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1213 // The basic principle is: if an app's traffic could possibly go over a 1214 // network, without the app doing anything multinetwork-specific, 1215 // (hence, by "default"), then include that network's capabilities in 1216 // the array. 1217 // 1218 // In the normal case, app traffic only goes over the system's default 1219 // network connection, so that's the only network returned. 1220 // 1221 // With a VPN in force, some app traffic may go into the VPN, and thus 1222 // over whatever underlying networks the VPN specifies, while other app 1223 // traffic may go over the system default network (e.g.: a split-tunnel 1224 // VPN, or an app disallowed by the VPN), so the set of networks 1225 // returned includes the VPN's underlying networks and the system 1226 // default. 1227 enforceAccessPermission(); 1228 1229 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1230 1231 NetworkAgentInfo nai = getDefaultNetwork(); 1232 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1233 if (nc != null) { 1234 result.put(nai.network, nc); 1235 } 1236 1237 if (!mLockdownEnabled) { 1238 synchronized (mVpns) { 1239 Vpn vpn = mVpns.get(userId); 1240 if (vpn != null) { 1241 Network[] networks = vpn.getUnderlyingNetworks(); 1242 if (networks != null) { 1243 for (Network network : networks) { 1244 nai = getNetworkAgentInfoForNetwork(network); 1245 nc = getNetworkCapabilitiesInternal(nai); 1246 if (nc != null) { 1247 result.put(network, nc); 1248 } 1249 } 1250 } 1251 } 1252 } 1253 } 1254 1255 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1256 out = result.values().toArray(out); 1257 return out; 1258 } 1259 1260 @Override 1261 public boolean isNetworkSupported(int networkType) { 1262 enforceAccessPermission(); 1263 return mLegacyTypeTracker.isTypeSupported(networkType); 1264 } 1265 1266 /** 1267 * Return LinkProperties for the active (i.e., connected) default 1268 * network interface. It is assumed that at most one default network 1269 * is active at a time. If more than one is active, it is indeterminate 1270 * which will be returned. 1271 * @return the ip properties for the active network, or {@code null} if 1272 * none is active 1273 */ 1274 @Override 1275 public LinkProperties getActiveLinkProperties() { 1276 enforceAccessPermission(); 1277 final int uid = Binder.getCallingUid(); 1278 NetworkState state = getUnfilteredActiveNetworkState(uid); 1279 return state.linkProperties; 1280 } 1281 1282 @Override 1283 public LinkProperties getLinkPropertiesForType(int networkType) { 1284 enforceAccessPermission(); 1285 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1286 if (nai != null) { 1287 synchronized (nai) { 1288 return new LinkProperties(nai.linkProperties); 1289 } 1290 } 1291 return null; 1292 } 1293 1294 // TODO - this should be ALL networks 1295 @Override 1296 public LinkProperties getLinkProperties(Network network) { 1297 enforceAccessPermission(); 1298 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1299 if (nai != null) { 1300 synchronized (nai) { 1301 return new LinkProperties(nai.linkProperties); 1302 } 1303 } 1304 return null; 1305 } 1306 1307 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1308 if (nai != null) { 1309 synchronized (nai) { 1310 if (nai.networkCapabilities != null) { 1311 return new NetworkCapabilities(nai.networkCapabilities); 1312 } 1313 } 1314 } 1315 return null; 1316 } 1317 1318 @Override 1319 public NetworkCapabilities getNetworkCapabilities(Network network) { 1320 enforceAccessPermission(); 1321 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1322 } 1323 1324 @Override 1325 public NetworkState[] getAllNetworkState() { 1326 // Require internal since we're handing out IMSI details 1327 enforceConnectivityInternalPermission(); 1328 1329 final ArrayList<NetworkState> result = Lists.newArrayList(); 1330 for (Network network : getAllNetworks()) { 1331 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1332 if (nai != null) { 1333 result.add(nai.getNetworkState()); 1334 } 1335 } 1336 return result.toArray(new NetworkState[result.size()]); 1337 } 1338 1339 @Override 1340 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1341 enforceAccessPermission(); 1342 final int uid = Binder.getCallingUid(); 1343 final long token = Binder.clearCallingIdentity(); 1344 try { 1345 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1346 if (state.networkInfo != null) { 1347 try { 1348 return mPolicyManager.getNetworkQuotaInfo(state); 1349 } catch (RemoteException e) { 1350 } 1351 } 1352 return null; 1353 } finally { 1354 Binder.restoreCallingIdentity(token); 1355 } 1356 } 1357 1358 @Override 1359 public boolean isActiveNetworkMetered() { 1360 enforceAccessPermission(); 1361 1362 final NetworkInfo info = getActiveNetworkInfo(); 1363 return (info != null) ? info.isMetered() : false; 1364 } 1365 1366 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1367 @Override 1368 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1369 int deviceType = Integer.parseInt(label); 1370 sendDataActivityBroadcast(deviceType, active, tsNanos); 1371 } 1372 }; 1373 1374 /** 1375 * Ensure that a network route exists to deliver traffic to the specified 1376 * host via the specified network interface. 1377 * @param networkType the type of the network over which traffic to the 1378 * specified host is to be routed 1379 * @param hostAddress the IP address of the host to which the route is 1380 * desired 1381 * @return {@code true} on success, {@code false} on failure 1382 */ 1383 @Override 1384 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1385 enforceChangePermission(); 1386 if (mProtectedNetworks.contains(networkType)) { 1387 enforceConnectivityInternalPermission(); 1388 } 1389 1390 InetAddress addr; 1391 try { 1392 addr = InetAddress.getByAddress(hostAddress); 1393 } catch (UnknownHostException e) { 1394 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1395 return false; 1396 } 1397 1398 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1399 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1400 return false; 1401 } 1402 1403 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1404 if (nai == null) { 1405 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1406 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1407 } else { 1408 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1409 } 1410 return false; 1411 } 1412 1413 DetailedState netState; 1414 synchronized (nai) { 1415 netState = nai.networkInfo.getDetailedState(); 1416 } 1417 1418 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1419 if (VDBG) { 1420 log("requestRouteToHostAddress on down network " 1421 + "(" + networkType + ") - dropped" 1422 + " netState=" + netState); 1423 } 1424 return false; 1425 } 1426 1427 final int uid = Binder.getCallingUid(); 1428 final long token = Binder.clearCallingIdentity(); 1429 try { 1430 LinkProperties lp; 1431 int netId; 1432 synchronized (nai) { 1433 lp = nai.linkProperties; 1434 netId = nai.network.netId; 1435 } 1436 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1437 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1438 return ok; 1439 } finally { 1440 Binder.restoreCallingIdentity(token); 1441 } 1442 } 1443 1444 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1445 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1446 if (bestRoute == null) { 1447 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1448 } else { 1449 String iface = bestRoute.getInterface(); 1450 if (bestRoute.getGateway().equals(addr)) { 1451 // if there is no better route, add the implied hostroute for our gateway 1452 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1453 } else { 1454 // if we will connect to this through another route, add a direct route 1455 // to it's gateway 1456 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1457 } 1458 } 1459 if (DBG) log("Adding legacy route " + bestRoute + 1460 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1461 try { 1462 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1463 } catch (Exception e) { 1464 // never crash - catch them all 1465 if (DBG) loge("Exception trying to add a route: " + e); 1466 return false; 1467 } 1468 return true; 1469 } 1470 1471 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1472 @Override 1473 public void onUidRulesChanged(int uid, int uidRules) { 1474 // caller is NPMS, since we only register with them 1475 if (LOGD_RULES) { 1476 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1477 } 1478 1479 synchronized (mRulesLock) { 1480 // skip update when we've already applied rules 1481 final int oldRules = mUidRules.get(uid, RULE_NONE); 1482 if (oldRules == uidRules) return; 1483 1484 if (uidRules == RULE_NONE) { 1485 mUidRules.delete(uid); 1486 } else { 1487 mUidRules.put(uid, uidRules); 1488 } 1489 } 1490 1491 // TODO: notify UID when it has requested targeted updates 1492 } 1493 1494 @Override 1495 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1496 // caller is NPMS, since we only register with them 1497 if (LOGD_RULES) { 1498 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1499 } 1500 1501 synchronized (mRulesLock) { 1502 mMeteredIfaces.clear(); 1503 for (String iface : meteredIfaces) { 1504 mMeteredIfaces.add(iface); 1505 } 1506 } 1507 } 1508 1509 @Override 1510 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1511 // caller is NPMS, since we only register with them 1512 if (LOGD_RULES) { 1513 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1514 } 1515 1516 synchronized (mRulesLock) { 1517 mRestrictBackground = restrictBackground; 1518 } 1519 1520 if (restrictBackground) { 1521 log("onRestrictBackgroundChanged(true): disabling tethering"); 1522 mTethering.untetherAll(); 1523 } 1524 } 1525 1526 @Override 1527 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1528 if (LOGD_RULES) { 1529 // caller is NPMS, since we only register with them 1530 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1531 + whitelisted + ")"); 1532 } 1533 } 1534 @Override 1535 public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { 1536 if (LOGD_RULES) { 1537 // caller is NPMS, since we only register with them 1538 log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" 1539 + blacklisted + ")"); 1540 } 1541 } 1542 }; 1543 1544 /** 1545 * Require that the caller is either in the same user or has appropriate permission to interact 1546 * across users. 1547 * 1548 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1549 */ 1550 private void enforceCrossUserPermission(int userId) { 1551 if (userId == UserHandle.getCallingUserId()) { 1552 // Not a cross-user call. 1553 return; 1554 } 1555 mContext.enforceCallingOrSelfPermission( 1556 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1557 "ConnectivityService"); 1558 } 1559 1560 private void enforceInternetPermission() { 1561 mContext.enforceCallingOrSelfPermission( 1562 android.Manifest.permission.INTERNET, 1563 "ConnectivityService"); 1564 } 1565 1566 private void enforceAccessPermission() { 1567 mContext.enforceCallingOrSelfPermission( 1568 android.Manifest.permission.ACCESS_NETWORK_STATE, 1569 "ConnectivityService"); 1570 } 1571 1572 private void enforceChangePermission() { 1573 ConnectivityManager.enforceChangePermission(mContext); 1574 } 1575 1576 private void enforceTetherAccessPermission() { 1577 mContext.enforceCallingOrSelfPermission( 1578 android.Manifest.permission.ACCESS_NETWORK_STATE, 1579 "ConnectivityService"); 1580 } 1581 1582 private void enforceConnectivityInternalPermission() { 1583 mContext.enforceCallingOrSelfPermission( 1584 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1585 "ConnectivityService"); 1586 } 1587 1588 private void enforceConnectivityRestrictedNetworksPermission() { 1589 try { 1590 mContext.enforceCallingOrSelfPermission( 1591 android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, 1592 "ConnectivityService"); 1593 return; 1594 } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } 1595 enforceConnectivityInternalPermission(); 1596 } 1597 1598 private void enforceKeepalivePermission() { 1599 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1600 } 1601 1602 // Public because it's used by mLockdownTracker. 1603 public void sendConnectedBroadcast(NetworkInfo info) { 1604 enforceConnectivityInternalPermission(); 1605 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1606 } 1607 1608 private void sendInetConditionBroadcast(NetworkInfo info) { 1609 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1610 } 1611 1612 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1613 if (mLockdownTracker != null) { 1614 info = new NetworkInfo(info); 1615 mLockdownTracker.augmentNetworkInfo(info); 1616 } 1617 1618 Intent intent = new Intent(bcastType); 1619 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1620 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1621 if (info.isFailover()) { 1622 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1623 info.setFailover(false); 1624 } 1625 if (info.getReason() != null) { 1626 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1627 } 1628 if (info.getExtraInfo() != null) { 1629 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1630 info.getExtraInfo()); 1631 } 1632 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1633 return intent; 1634 } 1635 1636 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1637 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1638 } 1639 1640 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1641 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1642 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1643 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1644 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1645 final long ident = Binder.clearCallingIdentity(); 1646 try { 1647 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1648 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1649 } finally { 1650 Binder.restoreCallingIdentity(ident); 1651 } 1652 } 1653 1654 private void sendStickyBroadcast(Intent intent) { 1655 synchronized(this) { 1656 if (!mSystemReady) { 1657 mInitialBroadcast = new Intent(intent); 1658 } 1659 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1660 if (VDBG) { 1661 log("sendStickyBroadcast: action=" + intent.getAction()); 1662 } 1663 1664 Bundle options = null; 1665 final long ident = Binder.clearCallingIdentity(); 1666 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1667 final NetworkInfo ni = intent.getParcelableExtra( 1668 ConnectivityManager.EXTRA_NETWORK_INFO); 1669 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1670 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1671 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1672 } else { 1673 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1674 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1675 options = opts.toBundle(); 1676 } 1677 final IBatteryStats bs = BatteryStatsService.getService(); 1678 try { 1679 bs.noteConnectivityChanged(intent.getIntExtra( 1680 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1681 ni != null ? ni.getState().toString() : "?"); 1682 } catch (RemoteException e) { 1683 } 1684 } 1685 try { 1686 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1687 } finally { 1688 Binder.restoreCallingIdentity(ident); 1689 } 1690 } 1691 } 1692 1693 void systemReady() { 1694 loadGlobalProxy(); 1695 1696 synchronized(this) { 1697 mSystemReady = true; 1698 if (mInitialBroadcast != null) { 1699 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1700 mInitialBroadcast = null; 1701 } 1702 } 1703 // load the global proxy at startup 1704 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1705 1706 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1707 // for user to unlock device too. 1708 updateLockdownVpn(); 1709 1710 // Configure whether mobile data is always on. 1711 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1712 1713 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1714 1715 mPermissionMonitor.startMonitoring(); 1716 } 1717 1718 /** 1719 * Setup data activity tracking for the given network. 1720 * 1721 * Every {@code setupDataActivityTracking} should be paired with a 1722 * {@link #removeDataActivityTracking} for cleanup. 1723 */ 1724 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1725 final String iface = networkAgent.linkProperties.getInterfaceName(); 1726 1727 final int timeout; 1728 int type = ConnectivityManager.TYPE_NONE; 1729 1730 if (networkAgent.networkCapabilities.hasTransport( 1731 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1732 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1733 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1734 10); 1735 type = ConnectivityManager.TYPE_MOBILE; 1736 } else if (networkAgent.networkCapabilities.hasTransport( 1737 NetworkCapabilities.TRANSPORT_WIFI)) { 1738 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1739 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1740 15); 1741 type = ConnectivityManager.TYPE_WIFI; 1742 } else { 1743 // do not track any other networks 1744 timeout = 0; 1745 } 1746 1747 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1748 try { 1749 mNetd.addIdleTimer(iface, timeout, type); 1750 } catch (Exception e) { 1751 // You shall not crash! 1752 loge("Exception in setupDataActivityTracking " + e); 1753 } 1754 } 1755 } 1756 1757 /** 1758 * Remove data activity tracking when network disconnects. 1759 */ 1760 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1761 final String iface = networkAgent.linkProperties.getInterfaceName(); 1762 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1763 1764 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1765 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1766 try { 1767 // the call fails silently if no idletimer setup for this interface 1768 mNetd.removeIdleTimer(iface); 1769 } catch (Exception e) { 1770 loge("Exception in removeDataActivityTracking " + e); 1771 } 1772 } 1773 } 1774 1775 /** 1776 * Reads the network specific MTU size from reources. 1777 * and set it on it's iface. 1778 */ 1779 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1780 final String iface = newLp.getInterfaceName(); 1781 final int mtu = newLp.getMtu(); 1782 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1783 if (VDBG) log("identical MTU - not setting"); 1784 return; 1785 } 1786 1787 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1788 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1789 return; 1790 } 1791 1792 // Cannot set MTU without interface name 1793 if (TextUtils.isEmpty(iface)) { 1794 loge("Setting MTU size with null iface."); 1795 return; 1796 } 1797 1798 try { 1799 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1800 mNetd.setMtu(iface, mtu); 1801 } catch (Exception e) { 1802 Slog.e(TAG, "exception in setMtu()" + e); 1803 } 1804 } 1805 1806 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1807 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1808 1809 // Overridden for testing purposes to avoid writing to SystemProperties. 1810 @VisibleForTesting 1811 protected int getDefaultTcpRwnd() { 1812 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1813 } 1814 1815 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1816 if (isDefaultNetwork(nai) == false) { 1817 return; 1818 } 1819 1820 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1821 String[] values = null; 1822 if (tcpBufferSizes != null) { 1823 values = tcpBufferSizes.split(","); 1824 } 1825 1826 if (values == null || values.length != 6) { 1827 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1828 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1829 values = tcpBufferSizes.split(","); 1830 } 1831 1832 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1833 1834 try { 1835 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1836 1837 final String prefix = "/sys/kernel/ipv4/tcp_"; 1838 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1839 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1840 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1841 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1842 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1843 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1844 mCurrentTcpBufferSizes = tcpBufferSizes; 1845 } catch (IOException e) { 1846 loge("Can't set TCP buffer sizes:" + e); 1847 } 1848 1849 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1850 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1851 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1852 if (rwndValue != 0) { 1853 SystemProperties.set(sysctlKey, rwndValue.toString()); 1854 } 1855 } 1856 1857 private void flushVmDnsCache() { 1858 /* 1859 * Tell the VMs to toss their DNS caches 1860 */ 1861 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1862 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1863 /* 1864 * Connectivity events can happen before boot has completed ... 1865 */ 1866 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1867 final long ident = Binder.clearCallingIdentity(); 1868 try { 1869 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1870 } finally { 1871 Binder.restoreCallingIdentity(ident); 1872 } 1873 } 1874 1875 @Override 1876 public int getRestoreDefaultNetworkDelay(int networkType) { 1877 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1878 NETWORK_RESTORE_DELAY_PROP_NAME); 1879 if(restoreDefaultNetworkDelayStr != null && 1880 restoreDefaultNetworkDelayStr.length() != 0) { 1881 try { 1882 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1883 } catch (NumberFormatException e) { 1884 } 1885 } 1886 // if the system property isn't set, use the value for the apn type 1887 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1888 1889 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1890 (mNetConfigs[networkType] != null)) { 1891 ret = mNetConfigs[networkType].restoreTime; 1892 } 1893 return ret; 1894 } 1895 1896 private boolean argsContain(String[] args, String target) { 1897 for (String arg : args) { 1898 if (arg.equals(target)) return true; 1899 } 1900 return false; 1901 } 1902 1903 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1904 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1905 final long DIAG_TIME_MS = 5000; 1906 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1907 // Start gathering diagnostic information. 1908 netDiags.add(new NetworkDiagnostics( 1909 nai.network, 1910 new LinkProperties(nai.linkProperties), // Must be a copy. 1911 DIAG_TIME_MS)); 1912 } 1913 1914 for (NetworkDiagnostics netDiag : netDiags) { 1915 pw.println(); 1916 netDiag.waitForMeasurements(); 1917 netDiag.dump(pw); 1918 } 1919 } 1920 1921 @Override 1922 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1923 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1924 if (mContext.checkCallingOrSelfPermission( 1925 android.Manifest.permission.DUMP) 1926 != PackageManager.PERMISSION_GRANTED) { 1927 pw.println("Permission Denial: can't dump ConnectivityService " + 1928 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1929 Binder.getCallingUid()); 1930 return; 1931 } 1932 1933 if (argsContain(args, "--diag")) { 1934 dumpNetworkDiagnostics(pw); 1935 return; 1936 } 1937 1938 pw.print("NetworkFactories for:"); 1939 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1940 pw.print(" " + nfi.name); 1941 } 1942 pw.println(); 1943 pw.println(); 1944 1945 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1946 pw.print("Active default network: "); 1947 if (defaultNai == null) { 1948 pw.println("none"); 1949 } else { 1950 pw.println(defaultNai.network.netId); 1951 } 1952 pw.println(); 1953 1954 pw.println("Current Networks:"); 1955 pw.increaseIndent(); 1956 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1957 pw.println(nai.toString()); 1958 pw.increaseIndent(); 1959 pw.println(String.format("Requests: %d request/%d total", 1960 nai.numRequestNetworkRequests(), nai.numNetworkRequests())); 1961 pw.increaseIndent(); 1962 for (int i = 0; i < nai.numNetworkRequests(); i++) { 1963 pw.println(nai.requestAt(i).toString()); 1964 } 1965 pw.decreaseIndent(); 1966 pw.println("Lingered:"); 1967 pw.increaseIndent(); 1968 nai.dumpLingerTimers(pw); 1969 pw.decreaseIndent(); 1970 pw.decreaseIndent(); 1971 } 1972 pw.decreaseIndent(); 1973 pw.println(); 1974 1975 pw.println("Metered Interfaces:"); 1976 pw.increaseIndent(); 1977 for (String value : mMeteredIfaces) { 1978 pw.println(value); 1979 } 1980 pw.decreaseIndent(); 1981 pw.println(); 1982 1983 pw.print("Restrict background: "); 1984 pw.println(mRestrictBackground); 1985 pw.println(); 1986 1987 pw.println("Status for known UIDs:"); 1988 pw.increaseIndent(); 1989 final int size = mUidRules.size(); 1990 for (int i = 0; i < size; i++) { 1991 final int uid = mUidRules.keyAt(i); 1992 pw.print("UID="); 1993 pw.print(uid); 1994 final int uidRules = mUidRules.get(uid, RULE_NONE); 1995 pw.print(" rules="); 1996 pw.print(uidRulesToString(uidRules)); 1997 pw.println(); 1998 } 1999 pw.println(); 2000 pw.decreaseIndent(); 2001 2002 pw.println("Network Requests:"); 2003 pw.increaseIndent(); 2004 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2005 pw.println(nri.toString()); 2006 } 2007 pw.println(); 2008 pw.decreaseIndent(); 2009 2010 mLegacyTypeTracker.dump(pw); 2011 2012 synchronized (this) { 2013 pw.print("mNetTransitionWakeLock: currently " + 2014 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 2015 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 2016 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 2017 } else { 2018 pw.println(", last requested never"); 2019 } 2020 } 2021 2022 pw.println(); 2023 mTethering.dump(fd, pw, args); 2024 2025 pw.println(); 2026 mKeepaliveTracker.dump(pw); 2027 2028 pw.println(); 2029 2030 if (mInetLog != null && mInetLog.size() > 0) { 2031 pw.println(); 2032 pw.println("Inet condition reports:"); 2033 pw.increaseIndent(); 2034 for(int i = 0; i < mInetLog.size(); i++) { 2035 pw.println(mInetLog.get(i)); 2036 } 2037 pw.decreaseIndent(); 2038 } 2039 2040 if (argsContain(args, "--short") == false) { 2041 pw.println(); 2042 synchronized (mValidationLogs) { 2043 pw.println("mValidationLogs (most recent first):"); 2044 for (ValidationLog p : mValidationLogs) { 2045 pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); 2046 pw.increaseIndent(); 2047 p.mLog.dump(fd, pw, args); 2048 pw.decreaseIndent(); 2049 } 2050 } 2051 2052 pw.println(); 2053 pw.println("mNetworkRequestInfoLogs (most recent first):"); 2054 pw.increaseIndent(); 2055 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 2056 pw.decreaseIndent(); 2057 2058 pw.println(); 2059 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 2060 pw.increaseIndent(); 2061 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 2062 pw.decreaseIndent(); 2063 } 2064 } 2065 2066 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 2067 if (nai.network == null) return false; 2068 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 2069 if (officialNai != null && officialNai.equals(nai)) return true; 2070 if (officialNai != null || VDBG) { 2071 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 2072 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 2073 " - " + nai); 2074 } 2075 return false; 2076 } 2077 2078 // must be stateless - things change under us. 2079 private class NetworkStateTrackerHandler extends Handler { 2080 public NetworkStateTrackerHandler(Looper looper) { 2081 super(looper); 2082 } 2083 2084 private boolean maybeHandleAsyncChannelMessage(Message msg) { 2085 switch (msg.what) { 2086 default: 2087 return false; 2088 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2089 handleAsyncChannelHalfConnect(msg); 2090 break; 2091 } 2092 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2093 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2094 if (nai != null) nai.asyncChannel.disconnect(); 2095 break; 2096 } 2097 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2098 handleAsyncChannelDisconnected(msg); 2099 break; 2100 } 2101 } 2102 return true; 2103 } 2104 2105 private void maybeHandleNetworkAgentMessage(Message msg) { 2106 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2107 if (nai == null) { 2108 if (VDBG) { 2109 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 2110 log(String.format("%s from unknown NetworkAgent", what)); 2111 } 2112 return; 2113 } 2114 2115 switch (msg.what) { 2116 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2117 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2118 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2119 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 2120 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2121 } 2122 if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( 2123 networkCapabilities)) { 2124 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 2125 + nai.networkCapabilities + " -> " + networkCapabilities); 2126 } 2127 updateCapabilities(nai, networkCapabilities); 2128 break; 2129 } 2130 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2131 if (VDBG) { 2132 log("Update of LinkProperties for " + nai.name() + 2133 "; created=" + nai.created + 2134 "; everConnected=" + nai.everConnected); 2135 } 2136 LinkProperties oldLp = nai.linkProperties; 2137 synchronized (nai) { 2138 nai.linkProperties = (LinkProperties)msg.obj; 2139 } 2140 if (nai.everConnected) updateLinkProperties(nai, oldLp); 2141 break; 2142 } 2143 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2144 NetworkInfo info = (NetworkInfo) msg.obj; 2145 updateNetworkInfo(nai, info); 2146 break; 2147 } 2148 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2149 Integer score = (Integer) msg.obj; 2150 if (score != null) updateNetworkScore(nai, score.intValue()); 2151 break; 2152 } 2153 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2154 try { 2155 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2156 } catch (Exception e) { 2157 // Never crash! 2158 loge("Exception in addVpnUidRanges: " + e); 2159 } 2160 break; 2161 } 2162 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2163 try { 2164 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2165 } catch (Exception e) { 2166 // Never crash! 2167 loge("Exception in removeVpnUidRanges: " + e); 2168 } 2169 break; 2170 } 2171 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2172 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2173 loge("ERROR: already-connected network explicitly selected."); 2174 } 2175 nai.networkMisc.explicitlySelected = true; 2176 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2177 break; 2178 } 2179 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2180 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2181 break; 2182 } 2183 } 2184 } 2185 2186 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2187 switch (msg.what) { 2188 default: 2189 return false; 2190 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2191 final NetworkAgentInfo nai; 2192 synchronized (mNetworkForNetId) { 2193 nai = mNetworkForNetId.get(msg.arg2); 2194 } 2195 if (nai != null) { 2196 final boolean valid = 2197 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2198 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2199 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2200 if (valid != nai.lastValidated) { 2201 final int oldScore = nai.getCurrentScore(); 2202 nai.lastValidated = valid; 2203 nai.everValidated |= valid; 2204 updateCapabilities(nai, nai.networkCapabilities); 2205 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2206 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2207 } 2208 updateInetCondition(nai); 2209 // Let the NetworkAgent know the state of its network 2210 Bundle redirectUrlBundle = new Bundle(); 2211 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2212 nai.asyncChannel.sendMessage( 2213 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2214 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2215 0, redirectUrlBundle); 2216 } 2217 break; 2218 } 2219 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2220 final int netId = msg.arg2; 2221 final boolean visible = (msg.arg1 != 0); 2222 final NetworkAgentInfo nai; 2223 synchronized (mNetworkForNetId) { 2224 nai = mNetworkForNetId.get(netId); 2225 } 2226 // If captive portal status has changed, update capabilities. 2227 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2228 nai.lastCaptivePortalDetected = visible; 2229 nai.everCaptivePortalDetected |= visible; 2230 updateCapabilities(nai, nai.networkCapabilities); 2231 } 2232 if (!visible) { 2233 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2234 } else { 2235 if (nai == null) { 2236 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2237 break; 2238 } 2239 if (!nai.networkMisc.provisioningNotificationDisabled) { 2240 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2241 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2242 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2243 } 2244 } 2245 break; 2246 } 2247 } 2248 return true; 2249 } 2250 2251 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2252 switch (msg.what) { 2253 default: 2254 return false; 2255 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2256 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2257 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2258 handleLingerComplete(nai); 2259 } 2260 break; 2261 } 2262 } 2263 return true; 2264 } 2265 2266 @Override 2267 public void handleMessage(Message msg) { 2268 if (!maybeHandleAsyncChannelMessage(msg) && 2269 !maybeHandleNetworkMonitorMessage(msg) && 2270 !maybeHandleNetworkAgentInfoMessage(msg)) { 2271 maybeHandleNetworkAgentMessage(msg); 2272 } 2273 } 2274 } 2275 2276 private void updateLingerState(NetworkAgentInfo nai, long now) { 2277 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2278 // 2. If the network was lingering and there are now requests, unlinger it. 2279 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2280 // one lingered request, start lingering. 2281 nai.updateLingerTimer(); 2282 if (nai.isLingering() && nai.numRequestNetworkRequests() > 0) { 2283 if (DBG) log("Unlingering " + nai.name()); 2284 nai.unlinger(); 2285 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2286 } else if (unneeded(nai) && nai.getLingerExpiry() > 0) { // unneeded() calls isLingering() 2287 int lingerTime = (int) (nai.getLingerExpiry() - now); 2288 if (DBG) { 2289 Log.d(TAG, "Lingering " + nai.name() + " for " + lingerTime + "ms"); 2290 } 2291 nai.linger(); 2292 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2293 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2294 } 2295 } 2296 2297 private void handleAsyncChannelHalfConnect(Message msg) { 2298 AsyncChannel ac = (AsyncChannel) msg.obj; 2299 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2300 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2301 if (VDBG) log("NetworkFactory connected"); 2302 // A network factory has connected. Send it all current NetworkRequests. 2303 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2304 if (nri.request.isListen()) continue; 2305 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2306 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2307 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2308 } 2309 } else { 2310 loge("Error connecting NetworkFactory"); 2311 mNetworkFactoryInfos.remove(msg.obj); 2312 } 2313 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2314 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2315 if (VDBG) log("NetworkAgent connected"); 2316 // A network agent has requested a connection. Establish the connection. 2317 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2318 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2319 } else { 2320 loge("Error connecting NetworkAgent"); 2321 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2322 if (nai != null) { 2323 final boolean wasDefault = isDefaultNetwork(nai); 2324 synchronized (mNetworkForNetId) { 2325 mNetworkForNetId.remove(nai.network.netId); 2326 mNetIdInUse.delete(nai.network.netId); 2327 } 2328 // Just in case. 2329 mLegacyTypeTracker.remove(nai, wasDefault); 2330 } 2331 } 2332 } 2333 } 2334 2335 private void handleAsyncChannelDisconnected(Message msg) { 2336 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2337 if (nai != null) { 2338 if (DBG) { 2339 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2340 } 2341 // A network agent has disconnected. 2342 // TODO - if we move the logic to the network agent (have them disconnect 2343 // because they lost all their requests or because their score isn't good) 2344 // then they would disconnect organically, report their new state and then 2345 // disconnect the channel. 2346 if (nai.networkInfo.isConnected()) { 2347 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2348 null, null); 2349 } 2350 final boolean wasDefault = isDefaultNetwork(nai); 2351 if (wasDefault) { 2352 mDefaultInetConditionPublished = 0; 2353 // Log default network disconnection before required book-keeping. 2354 // Let rematchAllNetworksAndRequests() below record a new default network event 2355 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2356 // whose timestamps tell how long it takes to recover a default network. 2357 logDefaultNetworkEvent(null, nai); 2358 } 2359 notifyIfacesChangedForNetworkStats(); 2360 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2361 // by other networks that are already connected. Perhaps that can be done by 2362 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2363 // of rematchAllNetworksAndRequests 2364 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2365 mKeepaliveTracker.handleStopAllKeepalives(nai, 2366 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2367 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2368 mNetworkAgentInfos.remove(msg.replyTo); 2369 updateClat(null, nai.linkProperties, nai); 2370 synchronized (mNetworkForNetId) { 2371 // Remove the NetworkAgent, but don't mark the netId as 2372 // available until we've told netd to delete it below. 2373 mNetworkForNetId.remove(nai.network.netId); 2374 } 2375 // Remove all previously satisfied requests. 2376 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2377 NetworkRequest request = nai.requestAt(i); 2378 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2379 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2380 mNetworkForRequestId.remove(request.requestId); 2381 sendUpdatedScoreToFactories(request, 0); 2382 } 2383 } 2384 nai.clearLingerState(); 2385 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2386 removeDataActivityTracking(nai); 2387 notifyLockdownVpn(nai); 2388 requestNetworkTransitionWakelock(nai.name()); 2389 } 2390 mLegacyTypeTracker.remove(nai, wasDefault); 2391 rematchAllNetworksAndRequests(null, 0); 2392 if (nai.created) { 2393 // Tell netd to clean up the configuration for this network 2394 // (routing rules, DNS, etc). 2395 // This may be slow as it requires a lot of netd shelling out to ip and 2396 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2397 // after we've rematched networks with requests which should make a potential 2398 // fallback network the default or requested a new network from the 2399 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2400 // long time. 2401 try { 2402 mNetd.removeNetwork(nai.network.netId); 2403 } catch (Exception e) { 2404 loge("Exception removing network: " + e); 2405 } 2406 } 2407 synchronized (mNetworkForNetId) { 2408 mNetIdInUse.delete(nai.network.netId); 2409 } 2410 } else { 2411 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2412 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2413 } 2414 } 2415 2416 // If this method proves to be too slow then we can maintain a separate 2417 // pendingIntent => NetworkRequestInfo map. 2418 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2419 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2420 Intent intent = pendingIntent.getIntent(); 2421 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2422 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2423 if (existingPendingIntent != null && 2424 existingPendingIntent.getIntent().filterEquals(intent)) { 2425 return entry.getValue(); 2426 } 2427 } 2428 return null; 2429 } 2430 2431 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2432 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2433 2434 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2435 if (existingRequest != null) { // remove the existing request. 2436 if (DBG) log("Replacing " + existingRequest.request + " with " 2437 + nri.request + " because their intents matched."); 2438 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2439 } 2440 handleRegisterNetworkRequest(nri); 2441 } 2442 2443 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2444 mNetworkRequests.put(nri.request, nri); 2445 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2446 if (nri.request.isListen()) { 2447 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2448 if (nri.request.networkCapabilities.hasSignalStrength() && 2449 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2450 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2451 } 2452 } 2453 } 2454 rematchAllNetworksAndRequests(null, 0); 2455 if (nri.request.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2456 sendUpdatedScoreToFactories(nri.request, 0); 2457 } 2458 } 2459 2460 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2461 int callingUid) { 2462 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2463 if (nri != null) { 2464 handleReleaseNetworkRequest(nri.request, callingUid); 2465 } 2466 } 2467 2468 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2469 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2470 // would it have a chance of satisfying any NetworkRequests. 2471 private boolean unneeded(NetworkAgentInfo nai) { 2472 if (!nai.everConnected || nai.isVPN() || 2473 nai.isLingering() || nai.numRequestNetworkRequests() > 0) { 2474 return false; 2475 } 2476 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2477 // If this Network is already the highest scoring Network for a request, or if 2478 // there is hope for it to become one if it validated, then it is needed. 2479 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2480 (nai.isSatisfyingRequest(nri.request.requestId) || 2481 // Note that this catches two important cases: 2482 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2483 // is currently satisfying the request. This is desirable when 2484 // cellular ends up validating but WiFi does not. 2485 // 2. Unvalidated WiFi will not be reaped when validated cellular 2486 // is currently satisfying the request. This is desirable when 2487 // WiFi ends up validating and out scoring cellular. 2488 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2489 nai.getCurrentScoreAsValidated())) { 2490 return false; 2491 } 2492 } 2493 return true; 2494 } 2495 2496 private NetworkRequestInfo getNriForAppRequest( 2497 NetworkRequest request, int callingUid, String requestedOperation) { 2498 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2499 2500 if (nri != null) { 2501 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2502 log(String.format("UID %d attempted to %s for unowned request %s", 2503 callingUid, requestedOperation, nri)); 2504 return null; 2505 } 2506 } 2507 2508 return nri; 2509 } 2510 2511 private void handleRequestCallbackUpdate(NetworkRequest request, int callingUid, 2512 String description, int callbackType) { 2513 final NetworkRequestInfo nri = getNriForAppRequest(request, callingUid, description); 2514 if (nri == null) return; 2515 2516 final NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2517 // The network that is satisfying this request may have changed since 2518 // the application requested the update. 2519 // 2520 // - If the request is no longer satisfied, don't send any updates. 2521 // - If the request is satisfied by a different network, it is the 2522 // caller's responsibility to check that the Network object in the 2523 // callback matches the network that was returned in the last 2524 // onAvailable() callback for this request. 2525 if (nai == null) return; 2526 callCallbackForRequest(nri, nai, callbackType, 0); 2527 } 2528 2529 private void handleRequestLinkProperties(NetworkRequest request, int callingUid) { 2530 handleRequestCallbackUpdate(request, callingUid, 2531 "request LinkProperties", ConnectivityManager.CALLBACK_IP_CHANGED); 2532 } 2533 2534 private void handleRequestNetworkCapabilities(NetworkRequest request, int callingUid) { 2535 handleRequestCallbackUpdate(request, callingUid, 2536 "request NetworkCapabilities", ConnectivityManager.CALLBACK_CAP_CHANGED); 2537 } 2538 2539 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2540 final NetworkRequestInfo nri = getNriForAppRequest( 2541 request, callingUid, "release NetworkRequest"); 2542 if (nri == null) return; 2543 2544 if (VDBG || (DBG && nri.request.isRequest())) log("releasing " + request); 2545 nri.unlinkDeathRecipient(); 2546 mNetworkRequests.remove(request); 2547 synchronized (mUidToNetworkRequestCount) { 2548 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2549 if (requests < 1) { 2550 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2551 nri.mUid); 2552 } else if (requests == 1) { 2553 mUidToNetworkRequestCount.removeAt( 2554 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2555 } else { 2556 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2557 } 2558 } 2559 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2560 if (nri.request.isRequest()) { 2561 boolean wasKept = false; 2562 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2563 if (nai != null) { 2564 nai.removeRequest(nri.request.requestId); 2565 if (VDBG) { 2566 log(" Removing from current network " + nai.name() + 2567 ", leaving " + nai.numNetworkRequests() + " requests."); 2568 } 2569 // If there are still lingered requests on this network, don't tear it down, 2570 // but resume lingering instead. 2571 updateLingerState(nai, SystemClock.elapsedRealtime()); 2572 if (unneeded(nai)) { 2573 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2574 teardownUnneededNetwork(nai); 2575 } else { 2576 wasKept = true; 2577 } 2578 mNetworkForRequestId.remove(nri.request.requestId); 2579 } 2580 2581 // TODO: remove this code once we know that the Slog.wtf is never hit. 2582 // 2583 // Find all networks that are satisfying this request and remove the request 2584 // from their request lists. 2585 // TODO - it's my understanding that for a request there is only a single 2586 // network satisfying it, so this loop is wasteful 2587 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2588 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2589 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2590 otherNai.name() + ", but mNetworkAgentInfos says " + 2591 (nai != null ? nai.name() : "null")); 2592 } 2593 } 2594 2595 // Maintain the illusion. When this request arrived, we might have pretended 2596 // that a network connected to serve it, even though the network was already 2597 // connected. Now that this request has gone away, we might have to pretend 2598 // that the network disconnected. LegacyTypeTracker will generate that 2599 // phantom disconnect for this type. 2600 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2601 boolean doRemove = true; 2602 if (wasKept) { 2603 // check if any of the remaining requests for this network are for the 2604 // same legacy type - if so, don't remove the nai 2605 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2606 NetworkRequest otherRequest = nai.requestAt(i); 2607 if (otherRequest.legacyType == nri.request.legacyType && 2608 otherRequest.isRequest()) { 2609 if (DBG) log(" still have other legacy request - leaving"); 2610 doRemove = false; 2611 } 2612 } 2613 } 2614 2615 if (doRemove) { 2616 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2617 } 2618 } 2619 2620 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2621 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2622 nri.request); 2623 } 2624 } else { 2625 // listens don't have a singular affectedNetwork. Check all networks to see 2626 // if this listen request applies and remove it. 2627 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2628 nai.removeRequest(nri.request.requestId); 2629 if (nri.request.networkCapabilities.hasSignalStrength() && 2630 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2631 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2632 } 2633 } 2634 } 2635 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED, 0); 2636 } 2637 2638 @Override 2639 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2640 enforceConnectivityInternalPermission(); 2641 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2642 accept ? 1 : 0, always ? 1: 0, network)); 2643 } 2644 2645 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2646 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2647 " accept=" + accept + " always=" + always); 2648 2649 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2650 if (nai == null) { 2651 // Nothing to do. 2652 return; 2653 } 2654 2655 if (nai.everValidated) { 2656 // The network validated while the dialog box was up. Take no action. 2657 return; 2658 } 2659 2660 if (!nai.networkMisc.explicitlySelected) { 2661 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2662 } 2663 2664 if (accept != nai.networkMisc.acceptUnvalidated) { 2665 int oldScore = nai.getCurrentScore(); 2666 nai.networkMisc.acceptUnvalidated = accept; 2667 rematchAllNetworksAndRequests(nai, oldScore); 2668 sendUpdatedScoreToFactories(nai); 2669 } 2670 2671 if (always) { 2672 nai.asyncChannel.sendMessage( 2673 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2674 } 2675 2676 if (!accept) { 2677 // Tell the NetworkAgent to not automatically reconnect to the network. 2678 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2679 // Teardown the nework. 2680 teardownUnneededNetwork(nai); 2681 } 2682 2683 } 2684 2685 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2686 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2687 mHandler.sendMessageDelayed( 2688 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2689 PROMPT_UNVALIDATED_DELAY_MS); 2690 } 2691 2692 private void handlePromptUnvalidated(Network network) { 2693 if (VDBG) log("handlePromptUnvalidated " + network); 2694 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2695 2696 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2697 // we haven't already been told to switch to it regardless of whether it validated or not. 2698 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2699 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2700 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2701 return; 2702 } 2703 2704 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2705 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2706 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2707 intent.setClassName("com.android.settings", 2708 "com.android.settings.wifi.WifiNoInternetDialog"); 2709 2710 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2711 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2712 2713 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2714 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2715 } 2716 2717 private class InternalHandler extends Handler { 2718 public InternalHandler(Looper looper) { 2719 super(looper); 2720 } 2721 2722 @Override 2723 public void handleMessage(Message msg) { 2724 switch (msg.what) { 2725 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2726 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2727 String causedBy = null; 2728 synchronized (ConnectivityService.this) { 2729 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2730 mNetTransitionWakeLock.isHeld()) { 2731 mNetTransitionWakeLock.release(); 2732 causedBy = mNetTransitionWakeLockCausedBy; 2733 } else { 2734 break; 2735 } 2736 } 2737 if (VDBG) { 2738 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2739 log("Failed to find a new network - expiring NetTransition Wakelock"); 2740 } else { 2741 log("NetTransition Wakelock (" + 2742 (causedBy == null ? "unknown" : causedBy) + 2743 " cleared because we found a replacement network"); 2744 } 2745 } 2746 break; 2747 } 2748 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2749 handleDeprecatedGlobalHttpProxy(); 2750 break; 2751 } 2752 case EVENT_PROXY_HAS_CHANGED: { 2753 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2754 break; 2755 } 2756 case EVENT_REGISTER_NETWORK_FACTORY: { 2757 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2758 break; 2759 } 2760 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2761 handleUnregisterNetworkFactory((Messenger)msg.obj); 2762 break; 2763 } 2764 case EVENT_REGISTER_NETWORK_AGENT: { 2765 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2766 break; 2767 } 2768 case EVENT_REGISTER_NETWORK_REQUEST: 2769 case EVENT_REGISTER_NETWORK_LISTENER: { 2770 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2771 break; 2772 } 2773 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2774 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2775 handleRegisterNetworkRequestWithIntent(msg); 2776 break; 2777 } 2778 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2779 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2780 break; 2781 } 2782 case EVENT_RELEASE_NETWORK_REQUEST: { 2783 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2784 break; 2785 } 2786 case EVENT_SET_ACCEPT_UNVALIDATED: { 2787 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2788 break; 2789 } 2790 case EVENT_PROMPT_UNVALIDATED: { 2791 handlePromptUnvalidated((Network) msg.obj); 2792 break; 2793 } 2794 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2795 handleMobileDataAlwaysOn(); 2796 break; 2797 } 2798 case EVENT_REQUEST_LINKPROPERTIES: 2799 handleRequestLinkProperties((NetworkRequest) msg.obj, msg.arg1); 2800 break; 2801 case EVENT_REQUEST_NETCAPABILITIES: 2802 handleRequestNetworkCapabilities((NetworkRequest) msg.obj, msg.arg1); 2803 break; 2804 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2805 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2806 mKeepaliveTracker.handleStartKeepalive(msg); 2807 break; 2808 } 2809 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2810 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2811 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2812 int slot = msg.arg1; 2813 int reason = msg.arg2; 2814 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2815 break; 2816 } 2817 case EVENT_SYSTEM_READY: { 2818 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2819 nai.networkMonitor.systemReady = true; 2820 } 2821 break; 2822 } 2823 } 2824 } 2825 } 2826 2827 // javadoc from interface 2828 @Override 2829 public int tether(String iface) { 2830 ConnectivityManager.enforceTetherChangePermission(mContext); 2831 if (isTetheringSupported()) { 2832 final int status = mTethering.tether(iface); 2833 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2834 try { 2835 mPolicyManager.onTetheringChanged(iface, true); 2836 } catch (RemoteException e) { 2837 } 2838 } 2839 return status; 2840 } else { 2841 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2842 } 2843 } 2844 2845 // javadoc from interface 2846 @Override 2847 public int untether(String iface) { 2848 ConnectivityManager.enforceTetherChangePermission(mContext); 2849 2850 if (isTetheringSupported()) { 2851 final int status = mTethering.untether(iface); 2852 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2853 try { 2854 mPolicyManager.onTetheringChanged(iface, false); 2855 } catch (RemoteException e) { 2856 } 2857 } 2858 return status; 2859 } else { 2860 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2861 } 2862 } 2863 2864 // javadoc from interface 2865 @Override 2866 public int getLastTetherError(String iface) { 2867 enforceTetherAccessPermission(); 2868 2869 if (isTetheringSupported()) { 2870 return mTethering.getLastTetherError(iface); 2871 } else { 2872 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2873 } 2874 } 2875 2876 // TODO - proper iface API for selection by property, inspection, etc 2877 @Override 2878 public String[] getTetherableUsbRegexs() { 2879 enforceTetherAccessPermission(); 2880 if (isTetheringSupported()) { 2881 return mTethering.getTetherableUsbRegexs(); 2882 } else { 2883 return new String[0]; 2884 } 2885 } 2886 2887 @Override 2888 public String[] getTetherableWifiRegexs() { 2889 enforceTetherAccessPermission(); 2890 if (isTetheringSupported()) { 2891 return mTethering.getTetherableWifiRegexs(); 2892 } else { 2893 return new String[0]; 2894 } 2895 } 2896 2897 @Override 2898 public String[] getTetherableBluetoothRegexs() { 2899 enforceTetherAccessPermission(); 2900 if (isTetheringSupported()) { 2901 return mTethering.getTetherableBluetoothRegexs(); 2902 } else { 2903 return new String[0]; 2904 } 2905 } 2906 2907 @Override 2908 public int setUsbTethering(boolean enable) { 2909 ConnectivityManager.enforceTetherChangePermission(mContext); 2910 if (isTetheringSupported()) { 2911 return mTethering.setUsbTethering(enable); 2912 } else { 2913 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2914 } 2915 } 2916 2917 // TODO - move iface listing, queries, etc to new module 2918 // javadoc from interface 2919 @Override 2920 public String[] getTetherableIfaces() { 2921 enforceTetherAccessPermission(); 2922 return mTethering.getTetherableIfaces(); 2923 } 2924 2925 @Override 2926 public String[] getTetheredIfaces() { 2927 enforceTetherAccessPermission(); 2928 return mTethering.getTetheredIfaces(); 2929 } 2930 2931 @Override 2932 public String[] getTetheringErroredIfaces() { 2933 enforceTetherAccessPermission(); 2934 return mTethering.getErroredIfaces(); 2935 } 2936 2937 @Override 2938 public String[] getTetheredDhcpRanges() { 2939 enforceConnectivityInternalPermission(); 2940 return mTethering.getTetheredDhcpRanges(); 2941 } 2942 2943 // if ro.tether.denied = true we default to no tethering 2944 // gservices could set the secure setting to 1 though to enable it on a build where it 2945 // had previously been turned off. 2946 @Override 2947 public boolean isTetheringSupported() { 2948 enforceTetherAccessPermission(); 2949 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2950 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2951 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2952 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2953 return tetherEnabledInSettings && mUserManager.isAdminUser() && 2954 ((mTethering.getTetherableUsbRegexs().length != 0 || 2955 mTethering.getTetherableWifiRegexs().length != 0 || 2956 mTethering.getTetherableBluetoothRegexs().length != 0) && 2957 mTethering.getUpstreamIfaceTypes().length != 0); 2958 } 2959 2960 @Override 2961 public void startTethering(int type, ResultReceiver receiver, 2962 boolean showProvisioningUi) { 2963 ConnectivityManager.enforceTetherChangePermission(mContext); 2964 if (!isTetheringSupported()) { 2965 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 2966 return; 2967 } 2968 mTethering.startTethering(type, receiver, showProvisioningUi); 2969 } 2970 2971 @Override 2972 public void stopTethering(int type) { 2973 ConnectivityManager.enforceTetherChangePermission(mContext); 2974 mTethering.stopTethering(type); 2975 } 2976 2977 // Called when we lose the default network and have no replacement yet. 2978 // This will automatically be cleared after X seconds or a new default network 2979 // becomes CONNECTED, whichever happens first. The timer is started by the 2980 // first caller and not restarted by subsequent callers. 2981 private void requestNetworkTransitionWakelock(String forWhom) { 2982 int serialNum = 0; 2983 synchronized (this) { 2984 if (mNetTransitionWakeLock.isHeld()) return; 2985 serialNum = ++mNetTransitionWakeLockSerialNumber; 2986 mNetTransitionWakeLock.acquire(); 2987 mNetTransitionWakeLockCausedBy = forWhom; 2988 } 2989 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2990 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2991 mNetTransitionWakeLockTimeout); 2992 return; 2993 } 2994 2995 // 100 percent is full good, 0 is full bad. 2996 @Override 2997 public void reportInetCondition(int networkType, int percentage) { 2998 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2999 if (nai == null) return; 3000 reportNetworkConnectivity(nai.network, percentage > 50); 3001 } 3002 3003 @Override 3004 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 3005 enforceAccessPermission(); 3006 enforceInternetPermission(); 3007 3008 NetworkAgentInfo nai; 3009 if (network == null) { 3010 nai = getDefaultNetwork(); 3011 } else { 3012 nai = getNetworkAgentInfoForNetwork(network); 3013 } 3014 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 3015 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 3016 return; 3017 } 3018 // Revalidate if the app report does not match our current validated state. 3019 if (hasConnectivity == nai.lastValidated) return; 3020 final int uid = Binder.getCallingUid(); 3021 if (DBG) { 3022 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 3023 ") by " + uid); 3024 } 3025 synchronized (nai) { 3026 // Validating a network that has not yet connected could result in a call to 3027 // rematchNetworkAndRequests() which is not meant to work on such networks. 3028 if (!nai.everConnected) return; 3029 3030 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 3031 3032 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 3033 } 3034 } 3035 3036 private ProxyInfo getDefaultProxy() { 3037 // this information is already available as a world read/writable jvm property 3038 // so this API change wouldn't have a benifit. It also breaks the passing 3039 // of proxy info to all the JVMs. 3040 // enforceAccessPermission(); 3041 synchronized (mProxyLock) { 3042 ProxyInfo ret = mGlobalProxy; 3043 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3044 return ret; 3045 } 3046 } 3047 3048 @Override 3049 public ProxyInfo getProxyForNetwork(Network network) { 3050 if (network == null) return getDefaultProxy(); 3051 final ProxyInfo globalProxy = getGlobalProxy(); 3052 if (globalProxy != null) return globalProxy; 3053 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3054 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3055 // caller may not have. 3056 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3057 if (nai == null) return null; 3058 synchronized (nai) { 3059 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3060 if (proxyInfo == null) return null; 3061 return new ProxyInfo(proxyInfo); 3062 } 3063 } 3064 3065 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3066 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3067 // proxy is null then there is no proxy in place). 3068 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3069 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3070 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3071 proxy = null; 3072 } 3073 return proxy; 3074 } 3075 3076 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3077 // better for determining if a new proxy broadcast is necessary: 3078 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3079 // avoid unnecessary broadcasts. 3080 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3081 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3082 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3083 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3084 // all set. 3085 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3086 a = canonicalizeProxyInfo(a); 3087 b = canonicalizeProxyInfo(b); 3088 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3089 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3090 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3091 } 3092 3093 public void setGlobalProxy(ProxyInfo proxyProperties) { 3094 enforceConnectivityInternalPermission(); 3095 3096 synchronized (mProxyLock) { 3097 if (proxyProperties == mGlobalProxy) return; 3098 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3099 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3100 3101 String host = ""; 3102 int port = 0; 3103 String exclList = ""; 3104 String pacFileUrl = ""; 3105 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3106 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3107 if (!proxyProperties.isValid()) { 3108 if (DBG) 3109 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3110 return; 3111 } 3112 mGlobalProxy = new ProxyInfo(proxyProperties); 3113 host = mGlobalProxy.getHost(); 3114 port = mGlobalProxy.getPort(); 3115 exclList = mGlobalProxy.getExclusionListAsString(); 3116 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3117 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3118 } 3119 } else { 3120 mGlobalProxy = null; 3121 } 3122 ContentResolver res = mContext.getContentResolver(); 3123 final long token = Binder.clearCallingIdentity(); 3124 try { 3125 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3126 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3127 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3128 exclList); 3129 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3130 } finally { 3131 Binder.restoreCallingIdentity(token); 3132 } 3133 3134 if (mGlobalProxy == null) { 3135 proxyProperties = mDefaultProxy; 3136 } 3137 sendProxyBroadcast(proxyProperties); 3138 } 3139 } 3140 3141 private void loadGlobalProxy() { 3142 ContentResolver res = mContext.getContentResolver(); 3143 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3144 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3145 String exclList = Settings.Global.getString(res, 3146 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3147 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3148 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3149 ProxyInfo proxyProperties; 3150 if (!TextUtils.isEmpty(pacFileUrl)) { 3151 proxyProperties = new ProxyInfo(pacFileUrl); 3152 } else { 3153 proxyProperties = new ProxyInfo(host, port, exclList); 3154 } 3155 if (!proxyProperties.isValid()) { 3156 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3157 return; 3158 } 3159 3160 synchronized (mProxyLock) { 3161 mGlobalProxy = proxyProperties; 3162 } 3163 } 3164 } 3165 3166 public ProxyInfo getGlobalProxy() { 3167 // this information is already available as a world read/writable jvm property 3168 // so this API change wouldn't have a benifit. It also breaks the passing 3169 // of proxy info to all the JVMs. 3170 // enforceAccessPermission(); 3171 synchronized (mProxyLock) { 3172 return mGlobalProxy; 3173 } 3174 } 3175 3176 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3177 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3178 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3179 proxy = null; 3180 } 3181 synchronized (mProxyLock) { 3182 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3183 if (mDefaultProxy == proxy) return; // catches repeated nulls 3184 if (proxy != null && !proxy.isValid()) { 3185 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3186 return; 3187 } 3188 3189 // This call could be coming from the PacManager, containing the port of the local 3190 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3191 // global (to get the correct local port), and send a broadcast. 3192 // TODO: Switch PacManager to have its own message to send back rather than 3193 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3194 if ((mGlobalProxy != null) && (proxy != null) 3195 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3196 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3197 mGlobalProxy = proxy; 3198 sendProxyBroadcast(mGlobalProxy); 3199 return; 3200 } 3201 mDefaultProxy = proxy; 3202 3203 if (mGlobalProxy != null) return; 3204 if (!mDefaultProxyDisabled) { 3205 sendProxyBroadcast(proxy); 3206 } 3207 } 3208 } 3209 3210 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3211 // This method gets called when any network changes proxy, but the broadcast only ever contains 3212 // the default proxy (even if it hasn't changed). 3213 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3214 // world where an app might be bound to a non-default network. 3215 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3216 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3217 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3218 3219 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3220 sendProxyBroadcast(getDefaultProxy()); 3221 } 3222 } 3223 3224 private void handleDeprecatedGlobalHttpProxy() { 3225 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3226 Settings.Global.HTTP_PROXY); 3227 if (!TextUtils.isEmpty(proxy)) { 3228 String data[] = proxy.split(":"); 3229 if (data.length == 0) { 3230 return; 3231 } 3232 3233 String proxyHost = data[0]; 3234 int proxyPort = 8080; 3235 if (data.length > 1) { 3236 try { 3237 proxyPort = Integer.parseInt(data[1]); 3238 } catch (NumberFormatException e) { 3239 return; 3240 } 3241 } 3242 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3243 setGlobalProxy(p); 3244 } 3245 } 3246 3247 private void sendProxyBroadcast(ProxyInfo proxy) { 3248 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3249 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3250 if (DBG) log("sending Proxy Broadcast for " + proxy); 3251 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3252 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3253 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3254 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3255 final long ident = Binder.clearCallingIdentity(); 3256 try { 3257 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3258 } finally { 3259 Binder.restoreCallingIdentity(ident); 3260 } 3261 } 3262 3263 private static class SettingsObserver extends ContentObserver { 3264 final private HashMap<Uri, Integer> mUriEventMap; 3265 final private Context mContext; 3266 final private Handler mHandler; 3267 3268 SettingsObserver(Context context, Handler handler) { 3269 super(null); 3270 mUriEventMap = new HashMap<Uri, Integer>(); 3271 mContext = context; 3272 mHandler = handler; 3273 } 3274 3275 void observe(Uri uri, int what) { 3276 mUriEventMap.put(uri, what); 3277 final ContentResolver resolver = mContext.getContentResolver(); 3278 resolver.registerContentObserver(uri, false, this); 3279 } 3280 3281 @Override 3282 public void onChange(boolean selfChange) { 3283 Slog.wtf(TAG, "Should never be reached."); 3284 } 3285 3286 @Override 3287 public void onChange(boolean selfChange, Uri uri) { 3288 final Integer what = mUriEventMap.get(uri); 3289 if (what != null) { 3290 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3291 } else { 3292 loge("No matching event to send for URI=" + uri); 3293 } 3294 } 3295 } 3296 3297 private static void log(String s) { 3298 Slog.d(TAG, s); 3299 } 3300 3301 private static void loge(String s) { 3302 Slog.e(TAG, s); 3303 } 3304 3305 private static <T> T checkNotNull(T value, String message) { 3306 if (value == null) { 3307 throw new NullPointerException(message); 3308 } 3309 return value; 3310 } 3311 3312 /** 3313 * Prepare for a VPN application. 3314 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3315 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3316 * 3317 * @param oldPackage Package name of the application which currently controls VPN, which will 3318 * be replaced. If there is no such application, this should should either be 3319 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3320 * @param newPackage Package name of the application which should gain control of VPN, or 3321 * {@code null} to disable. 3322 * @param userId User for whom to prepare the new VPN. 3323 * 3324 * @hide 3325 */ 3326 @Override 3327 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3328 int userId) { 3329 enforceCrossUserPermission(userId); 3330 throwIfLockdownEnabled(); 3331 3332 synchronized(mVpns) { 3333 Vpn vpn = mVpns.get(userId); 3334 if (vpn != null) { 3335 return vpn.prepare(oldPackage, newPackage); 3336 } else { 3337 return false; 3338 } 3339 } 3340 } 3341 3342 /** 3343 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3344 * This method is used by system-privileged apps. 3345 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3346 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3347 * 3348 * @param packageName The package for which authorization state should change. 3349 * @param userId User for whom {@code packageName} is installed. 3350 * @param authorized {@code true} if this app should be able to start a VPN connection without 3351 * explicit user approval, {@code false} if not. 3352 * 3353 * @hide 3354 */ 3355 @Override 3356 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3357 enforceCrossUserPermission(userId); 3358 3359 synchronized(mVpns) { 3360 Vpn vpn = mVpns.get(userId); 3361 if (vpn != null) { 3362 vpn.setPackageAuthorization(packageName, authorized); 3363 } 3364 } 3365 } 3366 3367 /** 3368 * Configure a TUN interface and return its file descriptor. Parameters 3369 * are encoded and opaque to this class. This method is used by VpnBuilder 3370 * and not available in ConnectivityManager. Permissions are checked in 3371 * Vpn class. 3372 * @hide 3373 */ 3374 @Override 3375 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3376 throwIfLockdownEnabled(); 3377 int user = UserHandle.getUserId(Binder.getCallingUid()); 3378 synchronized(mVpns) { 3379 return mVpns.get(user).establish(config); 3380 } 3381 } 3382 3383 /** 3384 * Start legacy VPN, controlling native daemons as needed. Creates a 3385 * secondary thread to perform connection work, returning quickly. 3386 */ 3387 @Override 3388 public void startLegacyVpn(VpnProfile profile) { 3389 throwIfLockdownEnabled(); 3390 final LinkProperties egress = getActiveLinkProperties(); 3391 if (egress == null) { 3392 throw new IllegalStateException("Missing active network connection"); 3393 } 3394 int user = UserHandle.getUserId(Binder.getCallingUid()); 3395 synchronized(mVpns) { 3396 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3397 } 3398 } 3399 3400 /** 3401 * Return the information of the ongoing legacy VPN. This method is used 3402 * by VpnSettings and not available in ConnectivityManager. Permissions 3403 * are checked in Vpn class. 3404 */ 3405 @Override 3406 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3407 enforceCrossUserPermission(userId); 3408 3409 synchronized(mVpns) { 3410 return mVpns.get(userId).getLegacyVpnInfo(); 3411 } 3412 } 3413 3414 /** 3415 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3416 * and not available in ConnectivityManager. 3417 */ 3418 @Override 3419 public VpnInfo[] getAllVpnInfo() { 3420 enforceConnectivityInternalPermission(); 3421 if (mLockdownEnabled) { 3422 return new VpnInfo[0]; 3423 } 3424 3425 synchronized(mVpns) { 3426 List<VpnInfo> infoList = new ArrayList<>(); 3427 for (int i = 0; i < mVpns.size(); i++) { 3428 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3429 if (info != null) { 3430 infoList.add(info); 3431 } 3432 } 3433 return infoList.toArray(new VpnInfo[infoList.size()]); 3434 } 3435 } 3436 3437 /** 3438 * @return VPN information for accounting, or null if we can't retrieve all required 3439 * information, e.g primary underlying iface. 3440 */ 3441 @Nullable 3442 private VpnInfo createVpnInfo(Vpn vpn) { 3443 VpnInfo info = vpn.getVpnInfo(); 3444 if (info == null) { 3445 return null; 3446 } 3447 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3448 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3449 // the underlyingNetworks list. 3450 if (underlyingNetworks == null) { 3451 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3452 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3453 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3454 } 3455 } else if (underlyingNetworks.length > 0) { 3456 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3457 if (linkProperties != null) { 3458 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3459 } 3460 } 3461 return info.primaryUnderlyingIface == null ? null : info; 3462 } 3463 3464 /** 3465 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3466 * VpnDialogs and not available in ConnectivityManager. 3467 * Permissions are checked in Vpn class. 3468 * @hide 3469 */ 3470 @Override 3471 public VpnConfig getVpnConfig(int userId) { 3472 enforceCrossUserPermission(userId); 3473 synchronized(mVpns) { 3474 Vpn vpn = mVpns.get(userId); 3475 if (vpn != null) { 3476 return vpn.getVpnConfig(); 3477 } else { 3478 return null; 3479 } 3480 } 3481 } 3482 3483 @Override 3484 public boolean updateLockdownVpn() { 3485 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3486 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3487 return false; 3488 } 3489 3490 // Tear down existing lockdown if profile was removed 3491 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3492 if (mLockdownEnabled) { 3493 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3494 final VpnProfile profile = VpnProfile.decode( 3495 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3496 if (profile == null) { 3497 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3498 setLockdownTracker(null); 3499 return true; 3500 } 3501 int user = UserHandle.getUserId(Binder.getCallingUid()); 3502 synchronized(mVpns) { 3503 Vpn vpn = mVpns.get(user); 3504 if (vpn == null) { 3505 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3506 return false; 3507 } 3508 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3509 } 3510 } else { 3511 setLockdownTracker(null); 3512 } 3513 3514 return true; 3515 } 3516 3517 /** 3518 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3519 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3520 */ 3521 private void setLockdownTracker(LockdownVpnTracker tracker) { 3522 // Shutdown any existing tracker 3523 final LockdownVpnTracker existing = mLockdownTracker; 3524 mLockdownTracker = null; 3525 if (existing != null) { 3526 existing.shutdown(); 3527 } 3528 3529 try { 3530 if (tracker != null) { 3531 mNetd.setFirewallEnabled(true); 3532 mNetd.setFirewallInterfaceRule("lo", true); 3533 mLockdownTracker = tracker; 3534 mLockdownTracker.init(); 3535 } else { 3536 mNetd.setFirewallEnabled(false); 3537 } 3538 } catch (RemoteException e) { 3539 // ignored; NMS lives inside system_server 3540 } 3541 } 3542 3543 private void throwIfLockdownEnabled() { 3544 if (mLockdownEnabled) { 3545 throw new IllegalStateException("Unavailable in lockdown mode"); 3546 } 3547 } 3548 3549 /** 3550 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3551 * some setup and then call {@code establish()} to connect. 3552 * 3553 * @return {@code true} if the service was started, the service was already connected, or there 3554 * was no always-on VPN to start. {@code false} otherwise. 3555 */ 3556 private boolean startAlwaysOnVpn(int userId) { 3557 synchronized (mVpns) { 3558 Vpn vpn = mVpns.get(userId); 3559 if (vpn == null) { 3560 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3561 // exists already. 3562 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3563 return false; 3564 } 3565 3566 return vpn.startAlwaysOnVpn(); 3567 } 3568 } 3569 3570 @Override 3571 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3572 enforceConnectivityInternalPermission(); 3573 enforceCrossUserPermission(userId); 3574 3575 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3576 if (LockdownVpnTracker.isEnabled()) { 3577 return false; 3578 } 3579 3580 synchronized (mVpns) { 3581 Vpn vpn = mVpns.get(userId); 3582 if (vpn == null) { 3583 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3584 return false; 3585 } 3586 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3587 return false; 3588 } 3589 if (!startAlwaysOnVpn(userId)) { 3590 vpn.setAlwaysOnPackage(null, false); 3591 return false; 3592 } 3593 3594 vpn.saveAlwaysOnPackage(); 3595 } 3596 return true; 3597 } 3598 3599 @Override 3600 public String getAlwaysOnVpnPackage(int userId) { 3601 enforceConnectivityInternalPermission(); 3602 enforceCrossUserPermission(userId); 3603 3604 synchronized (mVpns) { 3605 Vpn vpn = mVpns.get(userId); 3606 if (vpn == null) { 3607 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3608 return null; 3609 } 3610 return vpn.getAlwaysOnPackage(); 3611 } 3612 } 3613 3614 @Override 3615 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3616 // TODO: Remove? Any reason to trigger a provisioning check? 3617 return -1; 3618 } 3619 3620 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3621 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3622 3623 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3624 Intent intent = new Intent(action); 3625 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3626 // Concatenate the range of types onto the range of NetIDs. 3627 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3628 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3629 networkType, null, pendingIntent, false); 3630 } 3631 3632 /** 3633 * Show or hide network provisioning notifications. 3634 * 3635 * We use notifications for two purposes: to notify that a network requires sign in 3636 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3637 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3638 * particular network we can display the notification type that was most recently requested. 3639 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3640 * might first display NO_INTERNET, and then when the captive portal check completes, display 3641 * SIGN_IN. 3642 * 3643 * @param id an identifier that uniquely identifies this notification. This must match 3644 * between show and hide calls. We use the NetID value but for legacy callers 3645 * we concatenate the range of types with the range of NetIDs. 3646 */ 3647 private void setProvNotificationVisibleIntent(boolean visible, int id, 3648 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3649 boolean highPriority) { 3650 if (VDBG || (DBG && visible)) { 3651 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3652 + " networkType=" + getNetworkTypeName(networkType) 3653 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3654 } 3655 3656 Resources r = Resources.getSystem(); 3657 NotificationManager notificationManager = (NotificationManager) mContext 3658 .getSystemService(Context.NOTIFICATION_SERVICE); 3659 3660 if (visible) { 3661 CharSequence title; 3662 CharSequence details; 3663 int icon; 3664 if (notifyType == NotificationType.NO_INTERNET && 3665 networkType == ConnectivityManager.TYPE_WIFI) { 3666 title = r.getString(R.string.wifi_no_internet, 0); 3667 details = r.getString(R.string.wifi_no_internet_detailed); 3668 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3669 } else if (notifyType == NotificationType.SIGN_IN) { 3670 switch (networkType) { 3671 case ConnectivityManager.TYPE_WIFI: 3672 title = r.getString(R.string.wifi_available_sign_in, 0); 3673 details = r.getString(R.string.network_available_sign_in_detailed, 3674 extraInfo); 3675 icon = R.drawable.stat_notify_wifi_in_range; 3676 break; 3677 case ConnectivityManager.TYPE_MOBILE: 3678 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3679 title = r.getString(R.string.network_available_sign_in, 0); 3680 // TODO: Change this to pull from NetworkInfo once a printable 3681 // name has been added to it 3682 details = mTelephonyManager.getNetworkOperatorName(); 3683 icon = R.drawable.stat_notify_rssi_in_range; 3684 break; 3685 default: 3686 title = r.getString(R.string.network_available_sign_in, 0); 3687 details = r.getString(R.string.network_available_sign_in_detailed, 3688 extraInfo); 3689 icon = R.drawable.stat_notify_rssi_in_range; 3690 break; 3691 } 3692 } else { 3693 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3694 + getNetworkTypeName(networkType)); 3695 return; 3696 } 3697 3698 Notification notification = new Notification.Builder(mContext) 3699 .setWhen(0) 3700 .setSmallIcon(icon) 3701 .setAutoCancel(true) 3702 .setTicker(title) 3703 .setColor(mContext.getColor( 3704 com.android.internal.R.color.system_notification_accent_color)) 3705 .setContentTitle(title) 3706 .setContentText(details) 3707 .setContentIntent(intent) 3708 .setLocalOnly(true) 3709 .setPriority(highPriority ? 3710 Notification.PRIORITY_HIGH : 3711 Notification.PRIORITY_DEFAULT) 3712 .setDefaults(highPriority ? Notification.DEFAULT_ALL : 0) 3713 .setOnlyAlertOnce(true) 3714 .build(); 3715 3716 try { 3717 notificationManager.notifyAsUser(NOTIFICATION_ID, id, notification, UserHandle.ALL); 3718 } catch (NullPointerException npe) { 3719 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3720 npe.printStackTrace(); 3721 } 3722 } else { 3723 try { 3724 notificationManager.cancelAsUser(NOTIFICATION_ID, id, UserHandle.ALL); 3725 } catch (NullPointerException npe) { 3726 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3727 npe.printStackTrace(); 3728 } 3729 } 3730 } 3731 3732 /** Location to an updatable file listing carrier provisioning urls. 3733 * An example: 3734 * 3735 * <?xml version="1.0" encoding="utf-8"?> 3736 * <provisioningUrls> 3737 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3738 * </provisioningUrls> 3739 */ 3740 private static final String PROVISIONING_URL_PATH = 3741 "/data/misc/radio/provisioning_urls.xml"; 3742 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3743 3744 /** XML tag for root element. */ 3745 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3746 /** XML tag for individual url */ 3747 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3748 /** XML attribute for mcc */ 3749 private static final String ATTR_MCC = "mcc"; 3750 /** XML attribute for mnc */ 3751 private static final String ATTR_MNC = "mnc"; 3752 3753 private String getProvisioningUrlBaseFromFile() { 3754 FileReader fileReader = null; 3755 XmlPullParser parser = null; 3756 Configuration config = mContext.getResources().getConfiguration(); 3757 3758 try { 3759 fileReader = new FileReader(mProvisioningUrlFile); 3760 parser = Xml.newPullParser(); 3761 parser.setInput(fileReader); 3762 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3763 3764 while (true) { 3765 XmlUtils.nextElement(parser); 3766 3767 String element = parser.getName(); 3768 if (element == null) break; 3769 3770 if (element.equals(TAG_PROVISIONING_URL)) { 3771 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3772 try { 3773 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3774 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3775 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3776 parser.next(); 3777 if (parser.getEventType() == XmlPullParser.TEXT) { 3778 return parser.getText(); 3779 } 3780 } 3781 } 3782 } catch (NumberFormatException e) { 3783 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3784 } 3785 } 3786 } 3787 return null; 3788 } catch (FileNotFoundException e) { 3789 loge("Carrier Provisioning Urls file not found"); 3790 } catch (XmlPullParserException e) { 3791 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3792 } catch (IOException e) { 3793 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3794 } finally { 3795 if (fileReader != null) { 3796 try { 3797 fileReader.close(); 3798 } catch (IOException e) {} 3799 } 3800 } 3801 return null; 3802 } 3803 3804 @Override 3805 public String getMobileProvisioningUrl() { 3806 enforceConnectivityInternalPermission(); 3807 String url = getProvisioningUrlBaseFromFile(); 3808 if (TextUtils.isEmpty(url)) { 3809 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3810 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3811 } else { 3812 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3813 } 3814 // populate the iccid, imei and phone number in the provisioning url. 3815 if (!TextUtils.isEmpty(url)) { 3816 String phoneNumber = mTelephonyManager.getLine1Number(); 3817 if (TextUtils.isEmpty(phoneNumber)) { 3818 phoneNumber = "0000000000"; 3819 } 3820 url = String.format(url, 3821 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3822 mTelephonyManager.getDeviceId() /* IMEI */, 3823 phoneNumber /* Phone numer */); 3824 } 3825 3826 return url; 3827 } 3828 3829 @Override 3830 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3831 String action) { 3832 enforceConnectivityInternalPermission(); 3833 final long ident = Binder.clearCallingIdentity(); 3834 try { 3835 setProvNotificationVisible(visible, networkType, action); 3836 } finally { 3837 Binder.restoreCallingIdentity(ident); 3838 } 3839 } 3840 3841 @Override 3842 public void setAirplaneMode(boolean enable) { 3843 enforceConnectivityInternalPermission(); 3844 final long ident = Binder.clearCallingIdentity(); 3845 try { 3846 final ContentResolver cr = mContext.getContentResolver(); 3847 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3848 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3849 intent.putExtra("state", enable); 3850 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3851 } finally { 3852 Binder.restoreCallingIdentity(ident); 3853 } 3854 } 3855 3856 private void onUserStart(int userId) { 3857 synchronized(mVpns) { 3858 Vpn userVpn = mVpns.get(userId); 3859 if (userVpn != null) { 3860 loge("Starting user already has a VPN"); 3861 return; 3862 } 3863 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3864 mVpns.put(userId, userVpn); 3865 3866 final ContentResolver cr = mContext.getContentResolver(); 3867 String alwaysOnPackage = Settings.Secure.getStringForUser(cr, 3868 Settings.Secure.ALWAYS_ON_VPN_APP, userId); 3869 final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, 3870 Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; 3871 if (alwaysOnPackage != null) { 3872 userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); 3873 } 3874 } 3875 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3876 updateLockdownVpn(); 3877 } 3878 } 3879 3880 private void onUserStop(int userId) { 3881 synchronized(mVpns) { 3882 Vpn userVpn = mVpns.get(userId); 3883 if (userVpn == null) { 3884 loge("Stopped user has no VPN"); 3885 return; 3886 } 3887 userVpn.onUserStopped(); 3888 mVpns.delete(userId); 3889 } 3890 } 3891 3892 private void onUserAdded(int userId) { 3893 synchronized(mVpns) { 3894 final int vpnsSize = mVpns.size(); 3895 for (int i = 0; i < vpnsSize; i++) { 3896 Vpn vpn = mVpns.valueAt(i); 3897 vpn.onUserAdded(userId); 3898 } 3899 } 3900 } 3901 3902 private void onUserRemoved(int userId) { 3903 synchronized(mVpns) { 3904 final int vpnsSize = mVpns.size(); 3905 for (int i = 0; i < vpnsSize; i++) { 3906 Vpn vpn = mVpns.valueAt(i); 3907 vpn.onUserRemoved(userId); 3908 } 3909 } 3910 } 3911 3912 private void onUserUnlocked(int userId) { 3913 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3914 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3915 updateLockdownVpn(); 3916 } else { 3917 startAlwaysOnVpn(userId); 3918 } 3919 } 3920 3921 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3922 @Override 3923 public void onReceive(Context context, Intent intent) { 3924 final String action = intent.getAction(); 3925 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3926 if (userId == UserHandle.USER_NULL) return; 3927 3928 if (Intent.ACTION_USER_STARTED.equals(action)) { 3929 onUserStart(userId); 3930 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3931 onUserStop(userId); 3932 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3933 onUserAdded(userId); 3934 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3935 onUserRemoved(userId); 3936 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3937 onUserUnlocked(userId); 3938 } 3939 } 3940 }; 3941 3942 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3943 new HashMap<Messenger, NetworkFactoryInfo>(); 3944 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3945 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3946 3947 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3948 // Map from UID to number of NetworkRequests that UID has filed. 3949 @GuardedBy("mUidToNetworkRequestCount") 3950 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3951 3952 private static class NetworkFactoryInfo { 3953 public final String name; 3954 public final Messenger messenger; 3955 public final AsyncChannel asyncChannel; 3956 3957 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3958 this.name = name; 3959 this.messenger = messenger; 3960 this.asyncChannel = asyncChannel; 3961 } 3962 } 3963 3964 private void ensureNetworkRequestHasType(NetworkRequest request) { 3965 if (request.type == NetworkRequest.Type.NONE) { 3966 throw new IllegalArgumentException( 3967 "All NetworkRequests in ConnectivityService must have a type"); 3968 } 3969 } 3970 3971 /** 3972 * Tracks info about the requester. 3973 * Also used to notice when the calling process dies so we can self-expire 3974 */ 3975 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3976 final NetworkRequest request; 3977 final PendingIntent mPendingIntent; 3978 boolean mPendingIntentSent; 3979 private final IBinder mBinder; 3980 final int mPid; 3981 final int mUid; 3982 final Messenger messenger; 3983 3984 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 3985 request = r; 3986 ensureNetworkRequestHasType(request); 3987 mPendingIntent = pi; 3988 messenger = null; 3989 mBinder = null; 3990 mPid = getCallingPid(); 3991 mUid = getCallingUid(); 3992 enforceRequestCountLimit(); 3993 } 3994 3995 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 3996 super(); 3997 messenger = m; 3998 request = r; 3999 ensureNetworkRequestHasType(request); 4000 mBinder = binder; 4001 mPid = getCallingPid(); 4002 mUid = getCallingUid(); 4003 mPendingIntent = null; 4004 enforceRequestCountLimit(); 4005 4006 try { 4007 mBinder.linkToDeath(this, 0); 4008 } catch (RemoteException e) { 4009 binderDied(); 4010 } 4011 } 4012 4013 private void enforceRequestCountLimit() { 4014 synchronized (mUidToNetworkRequestCount) { 4015 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 4016 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 4017 throw new IllegalArgumentException("Too many NetworkRequests filed"); 4018 } 4019 mUidToNetworkRequestCount.put(mUid, networkRequests); 4020 } 4021 } 4022 4023 void unlinkDeathRecipient() { 4024 if (mBinder != null) { 4025 mBinder.unlinkToDeath(this, 0); 4026 } 4027 } 4028 4029 public void binderDied() { 4030 log("ConnectivityService NetworkRequestInfo binderDied(" + 4031 request + ", " + mBinder + ")"); 4032 releaseNetworkRequest(request); 4033 } 4034 4035 public String toString() { 4036 return "uid/pid:" + mUid + "/" + mPid + " " + request + 4037 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 4038 } 4039 } 4040 4041 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 4042 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 4043 if (badCapability != null) { 4044 throw new IllegalArgumentException("Cannot request network with " + badCapability); 4045 } 4046 } 4047 4048 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 4049 final SortedSet<Integer> thresholds = new TreeSet(); 4050 synchronized (nai) { 4051 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4052 if (nri.request.networkCapabilities.hasSignalStrength() && 4053 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 4054 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 4055 } 4056 } 4057 } 4058 return new ArrayList<Integer>(thresholds); 4059 } 4060 4061 private void updateSignalStrengthThresholds( 4062 NetworkAgentInfo nai, String reason, NetworkRequest request) { 4063 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 4064 Bundle thresholds = new Bundle(); 4065 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 4066 4067 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 4068 String detail; 4069 if (request != null && request.networkCapabilities.hasSignalStrength()) { 4070 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 4071 } else { 4072 detail = reason; 4073 } 4074 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 4075 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 4076 } 4077 4078 nai.asyncChannel.sendMessage( 4079 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 4080 0, 0, thresholds); 4081 } 4082 4083 @Override 4084 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 4085 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 4086 final NetworkRequest.Type type = (networkCapabilities == null) 4087 ? NetworkRequest.Type.TRACK_DEFAULT 4088 : NetworkRequest.Type.REQUEST; 4089 // If the requested networkCapabilities is null, take them instead from 4090 // the default network request. This allows callers to keep track of 4091 // the system default network. 4092 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 4093 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 4094 enforceAccessPermission(); 4095 } else { 4096 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4097 enforceNetworkRequestPermissions(networkCapabilities); 4098 // TODO: this is incorrect. We mark the request as metered or not depending on the state 4099 // of the app when the request is filed, but we never change the request if the app 4100 // changes network state. http://b/29964605 4101 enforceMeteredApnPolicy(networkCapabilities); 4102 } 4103 ensureRequestableCapabilities(networkCapabilities); 4104 4105 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 4106 throw new IllegalArgumentException("Bad timeout specified"); 4107 } 4108 4109 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 4110 .equals(networkCapabilities.getNetworkSpecifier())) { 4111 throw new IllegalArgumentException("Invalid network specifier - must not be '" 4112 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 4113 } 4114 4115 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4116 nextNetworkRequestId(), type); 4117 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4118 if (DBG) log("requestNetwork for " + nri); 4119 4120 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4121 if (timeoutMs > 0) { 4122 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4123 nri), timeoutMs); 4124 } 4125 return networkRequest; 4126 } 4127 4128 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4129 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4130 enforceConnectivityRestrictedNetworksPermission(); 4131 } else { 4132 enforceChangePermission(); 4133 } 4134 } 4135 4136 @Override 4137 public boolean requestBandwidthUpdate(Network network) { 4138 enforceAccessPermission(); 4139 NetworkAgentInfo nai = null; 4140 if (network == null) { 4141 return false; 4142 } 4143 synchronized (mNetworkForNetId) { 4144 nai = mNetworkForNetId.get(network.netId); 4145 } 4146 if (nai != null) { 4147 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4148 return true; 4149 } 4150 return false; 4151 } 4152 4153 private boolean isSystem(int uid) { 4154 return uid < Process.FIRST_APPLICATION_UID; 4155 } 4156 4157 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4158 final int uid = Binder.getCallingUid(); 4159 if (isSystem(uid)) { 4160 return; 4161 } 4162 // if UID is restricted, don't allow them to bring up metered APNs 4163 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 4164 final int uidRules; 4165 synchronized(mRulesLock) { 4166 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 4167 } 4168 if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 4169 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { 4170 // we could silently fail or we can filter the available nets to only give 4171 // them those they have access to. Chose the more useful option. 4172 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4173 } 4174 } 4175 } 4176 4177 @Override 4178 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4179 PendingIntent operation) { 4180 checkNotNull(operation, "PendingIntent cannot be null."); 4181 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4182 enforceNetworkRequestPermissions(networkCapabilities); 4183 enforceMeteredApnPolicy(networkCapabilities); 4184 ensureRequestableCapabilities(networkCapabilities); 4185 4186 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4187 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4188 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4189 if (DBG) log("pendingRequest for " + nri); 4190 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4191 nri)); 4192 return networkRequest; 4193 } 4194 4195 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4196 mHandler.sendMessageDelayed( 4197 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4198 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4199 } 4200 4201 @Override 4202 public void releasePendingNetworkRequest(PendingIntent operation) { 4203 checkNotNull(operation, "PendingIntent cannot be null."); 4204 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4205 getCallingUid(), 0, operation)); 4206 } 4207 4208 // In order to implement the compatibility measure for pre-M apps that call 4209 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4210 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4211 // This ensures it has permission to do so. 4212 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4213 if (nc == null) { 4214 return false; 4215 } 4216 int[] transportTypes = nc.getTransportTypes(); 4217 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4218 return false; 4219 } 4220 try { 4221 mContext.enforceCallingOrSelfPermission( 4222 android.Manifest.permission.ACCESS_WIFI_STATE, 4223 "ConnectivityService"); 4224 } catch (SecurityException e) { 4225 return false; 4226 } 4227 return true; 4228 } 4229 4230 @Override 4231 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4232 Messenger messenger, IBinder binder) { 4233 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4234 enforceAccessPermission(); 4235 } 4236 4237 NetworkRequest networkRequest = new NetworkRequest( 4238 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4239 NetworkRequest.Type.LISTEN); 4240 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4241 if (VDBG) log("listenForNetwork for " + nri); 4242 4243 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4244 return networkRequest; 4245 } 4246 4247 @Override 4248 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4249 PendingIntent operation) { 4250 checkNotNull(operation, "PendingIntent cannot be null."); 4251 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4252 enforceAccessPermission(); 4253 } 4254 4255 NetworkRequest networkRequest = new NetworkRequest( 4256 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4257 NetworkRequest.Type.LISTEN); 4258 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4259 if (VDBG) log("pendingListenForNetwork for " + nri); 4260 4261 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4262 } 4263 4264 @Override 4265 public void requestLinkProperties(NetworkRequest networkRequest) { 4266 ensureNetworkRequestHasType(networkRequest); 4267 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4268 mHandler.sendMessage(mHandler.obtainMessage( 4269 EVENT_REQUEST_LINKPROPERTIES, getCallingUid(), 0, networkRequest)); 4270 } 4271 4272 @Override 4273 public void requestNetworkCapabilities(NetworkRequest networkRequest) { 4274 ensureNetworkRequestHasType(networkRequest); 4275 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4276 mHandler.sendMessage(mHandler.obtainMessage( 4277 EVENT_REQUEST_NETCAPABILITIES, getCallingUid(), 0, networkRequest)); 4278 } 4279 4280 @Override 4281 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4282 ensureNetworkRequestHasType(networkRequest); 4283 mHandler.sendMessage(mHandler.obtainMessage( 4284 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4285 } 4286 4287 @Override 4288 public void registerNetworkFactory(Messenger messenger, String name) { 4289 enforceConnectivityInternalPermission(); 4290 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4291 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4292 } 4293 4294 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4295 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4296 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4297 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4298 } 4299 4300 @Override 4301 public void unregisterNetworkFactory(Messenger messenger) { 4302 enforceConnectivityInternalPermission(); 4303 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4304 } 4305 4306 private void handleUnregisterNetworkFactory(Messenger messenger) { 4307 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4308 if (nfi == null) { 4309 loge("Failed to find Messenger in unregisterNetworkFactory"); 4310 return; 4311 } 4312 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4313 } 4314 4315 /** 4316 * NetworkAgentInfo supporting a request by requestId. 4317 * These have already been vetted (their Capabilities satisfy the request) 4318 * and the are the highest scored network available. 4319 * the are keyed off the Requests requestId. 4320 */ 4321 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4322 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4323 new SparseArray<NetworkAgentInfo>(); 4324 4325 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4326 @GuardedBy("mNetworkForNetId") 4327 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4328 new SparseArray<NetworkAgentInfo>(); 4329 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4330 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4331 // there may not be a strict 1:1 correlation between the two. 4332 @GuardedBy("mNetworkForNetId") 4333 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4334 4335 // NetworkAgentInfo keyed off its connecting messenger 4336 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4337 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4338 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4339 new HashMap<Messenger, NetworkAgentInfo>(); 4340 4341 @GuardedBy("mBlockedAppUids") 4342 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4343 4344 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4345 private final NetworkRequest mDefaultRequest; 4346 4347 // Request used to optionally keep mobile data active even when higher 4348 // priority networks like Wi-Fi are active. 4349 private final NetworkRequest mDefaultMobileDataRequest; 4350 4351 private NetworkAgentInfo getDefaultNetwork() { 4352 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4353 } 4354 4355 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4356 return nai == getDefaultNetwork(); 4357 } 4358 4359 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4360 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4361 int currentScore, NetworkMisc networkMisc) { 4362 enforceConnectivityInternalPermission(); 4363 4364 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4365 // satisfies mDefaultRequest. 4366 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4367 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4368 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4369 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4370 synchronized (this) { 4371 nai.networkMonitor.systemReady = mSystemReady; 4372 } 4373 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, 4374 networkInfo.getExtraInfo()); 4375 if (DBG) log("registerNetworkAgent " + nai); 4376 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4377 return nai.network.netId; 4378 } 4379 4380 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4381 if (VDBG) log("Got NetworkAgent Messenger"); 4382 mNetworkAgentInfos.put(na.messenger, na); 4383 synchronized (mNetworkForNetId) { 4384 mNetworkForNetId.put(na.network.netId, na); 4385 } 4386 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4387 NetworkInfo networkInfo = na.networkInfo; 4388 na.networkInfo = null; 4389 updateNetworkInfo(na, networkInfo); 4390 } 4391 4392 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4393 LinkProperties newLp = networkAgent.linkProperties; 4394 int netId = networkAgent.network.netId; 4395 4396 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4397 // we do anything else, make sure its LinkProperties are accurate. 4398 if (networkAgent.clatd != null) { 4399 networkAgent.clatd.fixupLinkProperties(oldLp); 4400 } 4401 4402 updateInterfaces(newLp, oldLp, netId); 4403 updateMtu(newLp, oldLp); 4404 // TODO - figure out what to do for clat 4405// for (LinkProperties lp : newLp.getStackedLinks()) { 4406// updateMtu(lp, null); 4407// } 4408 updateTcpBufferSizes(networkAgent); 4409 4410 updateRoutes(newLp, oldLp, netId); 4411 updateDnses(newLp, oldLp, netId); 4412 4413 updateClat(newLp, oldLp, networkAgent); 4414 if (isDefaultNetwork(networkAgent)) { 4415 handleApplyDefaultProxy(newLp.getHttpProxy()); 4416 } else { 4417 updateProxy(newLp, oldLp, networkAgent); 4418 } 4419 // TODO - move this check to cover the whole function 4420 if (!Objects.equals(newLp, oldLp)) { 4421 notifyIfacesChangedForNetworkStats(); 4422 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4423 } 4424 4425 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4426 } 4427 4428 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4429 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4430 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4431 4432 if (!wasRunningClat && shouldRunClat) { 4433 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4434 nai.clatd.start(); 4435 } else if (wasRunningClat && !shouldRunClat) { 4436 nai.clatd.stop(); 4437 } 4438 } 4439 4440 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4441 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4442 if (oldLp != null) { 4443 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4444 } else if (newLp != null) { 4445 interfaceDiff.added = newLp.getAllInterfaceNames(); 4446 } 4447 for (String iface : interfaceDiff.added) { 4448 try { 4449 if (DBG) log("Adding iface " + iface + " to network " + netId); 4450 mNetd.addInterfaceToNetwork(iface, netId); 4451 } catch (Exception e) { 4452 loge("Exception adding interface: " + e); 4453 } 4454 } 4455 for (String iface : interfaceDiff.removed) { 4456 try { 4457 if (DBG) log("Removing iface " + iface + " from network " + netId); 4458 mNetd.removeInterfaceFromNetwork(iface, netId); 4459 } catch (Exception e) { 4460 loge("Exception removing interface: " + e); 4461 } 4462 } 4463 } 4464 4465 /** 4466 * Have netd update routes from oldLp to newLp. 4467 * @return true if routes changed between oldLp and newLp 4468 */ 4469 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4470 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4471 if (oldLp != null) { 4472 routeDiff = oldLp.compareAllRoutes(newLp); 4473 } else if (newLp != null) { 4474 routeDiff.added = newLp.getAllRoutes(); 4475 } 4476 4477 // add routes before removing old in case it helps with continuous connectivity 4478 4479 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4480 for (RouteInfo route : routeDiff.added) { 4481 if (route.hasGateway()) continue; 4482 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4483 try { 4484 mNetd.addRoute(netId, route); 4485 } catch (Exception e) { 4486 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4487 loge("Exception in addRoute for non-gateway: " + e); 4488 } 4489 } 4490 } 4491 for (RouteInfo route : routeDiff.added) { 4492 if (route.hasGateway() == false) continue; 4493 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4494 try { 4495 mNetd.addRoute(netId, route); 4496 } catch (Exception e) { 4497 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4498 loge("Exception in addRoute for gateway: " + e); 4499 } 4500 } 4501 } 4502 4503 for (RouteInfo route : routeDiff.removed) { 4504 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4505 try { 4506 mNetd.removeRoute(netId, route); 4507 } catch (Exception e) { 4508 loge("Exception in removeRoute: " + e); 4509 } 4510 } 4511 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4512 } 4513 4514 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4515 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4516 return; // no updating necessary 4517 } 4518 4519 Collection<InetAddress> dnses = newLp.getDnsServers(); 4520 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4521 try { 4522 mNetd.setDnsConfigurationForNetwork( 4523 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4524 } catch (Exception e) { 4525 loge("Exception in setDnsConfigurationForNetwork: " + e); 4526 } 4527 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4528 if (defaultNai != null && defaultNai.network.netId == netId) { 4529 setDefaultDnsSystemProperties(dnses); 4530 } 4531 flushVmDnsCache(); 4532 } 4533 4534 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4535 int last = 0; 4536 for (InetAddress dns : dnses) { 4537 ++last; 4538 String key = "net.dns" + last; 4539 String value = dns.getHostAddress(); 4540 SystemProperties.set(key, value); 4541 } 4542 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4543 String key = "net.dns" + i; 4544 SystemProperties.set(key, ""); 4545 } 4546 mNumDnsEntries = last; 4547 } 4548 4549 /** 4550 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4551 * augmented with any stateful capabilities implied from {@code networkAgent} 4552 * (e.g., validated status and captive portal status). 4553 * 4554 * @param nai the network having its capabilities updated. 4555 * @param networkCapabilities the new network capabilities. 4556 */ 4557 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4558 // Don't modify caller's NetworkCapabilities. 4559 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4560 if (nai.lastValidated) { 4561 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4562 } else { 4563 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4564 } 4565 if (nai.lastCaptivePortalDetected) { 4566 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4567 } else { 4568 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4569 } 4570 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4571 final int oldScore = nai.getCurrentScore(); 4572 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4573 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4574 try { 4575 mNetd.setNetworkPermission(nai.network.netId, 4576 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4577 null : NetworkManagementService.PERMISSION_SYSTEM); 4578 } catch (RemoteException e) { 4579 loge("Exception in setNetworkPermission: " + e); 4580 } 4581 } 4582 synchronized (nai) { 4583 nai.networkCapabilities = networkCapabilities; 4584 } 4585 rematchAllNetworksAndRequests(nai, oldScore); 4586 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4587 } 4588 } 4589 4590 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4591 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4592 NetworkRequest nr = nai.requestAt(i); 4593 // Don't send listening requests to factories. b/17393458 4594 if (nr.isListen()) continue; 4595 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4596 } 4597 } 4598 4599 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4600 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4601 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4602 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4603 networkRequest); 4604 } 4605 } 4606 4607 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4608 int notificationType) { 4609 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4610 Intent intent = new Intent(); 4611 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4612 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4613 nri.mPendingIntentSent = true; 4614 sendIntent(nri.mPendingIntent, intent); 4615 } 4616 // else not handled 4617 } 4618 4619 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4620 mPendingIntentWakeLock.acquire(); 4621 try { 4622 if (DBG) log("Sending " + pendingIntent); 4623 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4624 } catch (PendingIntent.CanceledException e) { 4625 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4626 mPendingIntentWakeLock.release(); 4627 releasePendingNetworkRequest(pendingIntent); 4628 } 4629 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4630 } 4631 4632 @Override 4633 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4634 String resultData, Bundle resultExtras) { 4635 if (DBG) log("Finished sending " + pendingIntent); 4636 mPendingIntentWakeLock.release(); 4637 // Release with a delay so the receiving client has an opportunity to put in its 4638 // own request. 4639 releasePendingNetworkRequestWithDelay(pendingIntent); 4640 } 4641 4642 private void callCallbackForRequest(NetworkRequestInfo nri, 4643 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 4644 if (nri.messenger == null) return; // Default request has no msgr 4645 Bundle bundle = new Bundle(); 4646 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4647 new NetworkRequest(nri.request)); 4648 Message msg = Message.obtain(); 4649 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4650 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4651 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4652 } 4653 switch (notificationType) { 4654 case ConnectivityManager.CALLBACK_LOSING: { 4655 msg.arg1 = arg1; 4656 break; 4657 } 4658 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4659 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4660 new NetworkCapabilities(networkAgent.networkCapabilities)); 4661 break; 4662 } 4663 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4664 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4665 new LinkProperties(networkAgent.linkProperties)); 4666 break; 4667 } 4668 } 4669 msg.what = notificationType; 4670 msg.setData(bundle); 4671 try { 4672 if (VDBG) { 4673 log("sending notification " + notifyTypeToName(notificationType) + 4674 " for " + nri.request); 4675 } 4676 nri.messenger.send(msg); 4677 } catch (RemoteException e) { 4678 // may occur naturally in the race of binder death. 4679 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4680 } 4681 } 4682 4683 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4684 if (nai.numRequestNetworkRequests() != 0) { 4685 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4686 NetworkRequest nr = nai.requestAt(i); 4687 // Ignore listening requests. 4688 if (nr.isListen()) continue; 4689 loge("Dead network still had at least " + nr); 4690 break; 4691 } 4692 } 4693 nai.asyncChannel.disconnect(); 4694 } 4695 4696 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4697 if (oldNetwork == null) { 4698 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4699 return; 4700 } 4701 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4702 4703 // If we get here it means that the last linger timeout for this network expired. So there 4704 // must be no other active linger timers, and we must stop lingering. 4705 oldNetwork.clearLingerState(); 4706 4707 if (unneeded(oldNetwork)) { 4708 teardownUnneededNetwork(oldNetwork); 4709 } 4710 } 4711 4712 private void makeDefault(NetworkAgentInfo newNetwork) { 4713 if (DBG) log("Switching to new default network: " + newNetwork); 4714 setupDataActivityTracking(newNetwork); 4715 try { 4716 mNetd.setDefaultNetId(newNetwork.network.netId); 4717 } catch (Exception e) { 4718 loge("Exception setting default network :" + e); 4719 } 4720 notifyLockdownVpn(newNetwork); 4721 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4722 updateTcpBufferSizes(newNetwork); 4723 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4724 } 4725 4726 // Handles a network appearing or improving its score. 4727 // 4728 // - Evaluates all current NetworkRequests that can be 4729 // satisfied by newNetwork, and reassigns to newNetwork 4730 // any such requests for which newNetwork is the best. 4731 // 4732 // - Lingers any validated Networks that as a result are no longer 4733 // needed. A network is needed if it is the best network for 4734 // one or more NetworkRequests, or if it is a VPN. 4735 // 4736 // - Tears down newNetwork if it just became validated 4737 // but turns out to be unneeded. 4738 // 4739 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4740 // networks that have no chance (i.e. even if validated) 4741 // of becoming the highest scoring network. 4742 // 4743 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4744 // it does not remove NetworkRequests that other Networks could better satisfy. 4745 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4746 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4747 // as it performs better by a factor of the number of Networks. 4748 // 4749 // @param newNetwork is the network to be matched against NetworkRequests. 4750 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4751 // performed to tear down unvalidated networks that have no chance (i.e. even if 4752 // validated) of becoming the highest scoring network. 4753 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4754 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 4755 if (!newNetwork.everConnected) return; 4756 boolean keep = newNetwork.isVPN(); 4757 boolean isNewDefault = false; 4758 NetworkAgentInfo oldDefaultNetwork = null; 4759 if (VDBG) log("rematching " + newNetwork.name()); 4760 // Find and migrate to this Network any NetworkRequests for 4761 // which this network is now the best. 4762 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4763 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4764 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4765 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4766 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4767 final boolean satisfies = newNetwork.satisfies(nri.request); 4768 if (newNetwork == currentNetwork && satisfies) { 4769 if (VDBG) { 4770 log("Network " + newNetwork.name() + " was already satisfying" + 4771 " request " + nri.request.requestId + ". No change."); 4772 } 4773 keep = true; 4774 continue; 4775 } 4776 4777 // check if it satisfies the NetworkCapabilities 4778 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4779 if (satisfies) { 4780 if (nri.request.isListen()) { 4781 // This is not a request, it's a callback listener. 4782 // Add it to newNetwork regardless of score. 4783 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4784 continue; 4785 } 4786 4787 // next check if it's better than any current network we're using for 4788 // this request 4789 if (VDBG) { 4790 log("currentScore = " + 4791 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4792 ", newScore = " + newNetwork.getCurrentScore()); 4793 } 4794 if (currentNetwork == null || 4795 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4796 if (VDBG) log("rematch for " + newNetwork.name()); 4797 if (currentNetwork != null) { 4798 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4799 currentNetwork.removeRequest(nri.request.requestId); 4800 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 4801 affectedNetworks.add(currentNetwork); 4802 } else { 4803 if (VDBG) log(" accepting network in place of null"); 4804 } 4805 newNetwork.unlingerRequest(nri.request); 4806 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4807 if (!newNetwork.addRequest(nri.request)) { 4808 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4809 } 4810 addedRequests.add(nri); 4811 keep = true; 4812 // Tell NetworkFactories about the new score, so they can stop 4813 // trying to connect if they know they cannot match it. 4814 // TODO - this could get expensive if we have alot of requests for this 4815 // network. Think about if there is a way to reduce this. Push 4816 // netid->request mapping to each factory? 4817 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4818 if (mDefaultRequest.requestId == nri.request.requestId) { 4819 isNewDefault = true; 4820 oldDefaultNetwork = currentNetwork; 4821 } 4822 } 4823 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 4824 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4825 // mark it as no longer satisfying "nri". Because networks are processed by 4826 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4827 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4828 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4829 // This means this code doesn't have to handle the case where "currentNetwork" no 4830 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4831 if (DBG) { 4832 log("Network " + newNetwork.name() + " stopped satisfying" + 4833 " request " + nri.request.requestId); 4834 } 4835 newNetwork.removeRequest(nri.request.requestId); 4836 if (currentNetwork == newNetwork) { 4837 mNetworkForRequestId.remove(nri.request.requestId); 4838 sendUpdatedScoreToFactories(nri.request, 0); 4839 } else { 4840 if (nri.request.isRequest()) { 4841 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4842 newNetwork.name() + 4843 " without updating mNetworkForRequestId or factories!"); 4844 } 4845 } 4846 // TODO: technically, sending CALLBACK_LOST here is 4847 // incorrect if nri is a request (not a listen) and there 4848 // is a replacement network currently connected that can 4849 // satisfy it. However, the only capability that can both 4850 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4851 // so this code is only incorrect for a network that loses 4852 // the TRUSTED capability, which is a rare case. 4853 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 4854 } 4855 } 4856 if (isNewDefault) { 4857 // Notify system services that this network is up. 4858 makeDefault(newNetwork); 4859 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 4860 logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); 4861 synchronized (ConnectivityService.this) { 4862 // have a new default network, release the transition wakelock in 4863 // a second if it's held. The second pause is to allow apps 4864 // to reconnect over the new network 4865 if (mNetTransitionWakeLock.isHeld()) { 4866 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4867 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4868 mNetTransitionWakeLockSerialNumber, 0), 4869 1000); 4870 } 4871 } 4872 } 4873 4874 // do this after the default net is switched, but 4875 // before LegacyTypeTracker sends legacy broadcasts 4876 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4877 4878 // Linger any networks that are no longer needed. This should be done after sending the 4879 // available callback for newNetwork. 4880 for (NetworkAgentInfo nai : affectedNetworks) { 4881 updateLingerState(nai, now); 4882 } 4883 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 4884 // does not need to be done in any particular order. 4885 updateLingerState(newNetwork, now); 4886 4887 if (isNewDefault) { 4888 // Maintain the illusion: since the legacy API only 4889 // understands one network at a time, we must pretend 4890 // that the current default network disconnected before 4891 // the new one connected. 4892 if (oldDefaultNetwork != null) { 4893 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4894 oldDefaultNetwork, true); 4895 } 4896 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4897 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4898 notifyLockdownVpn(newNetwork); 4899 } 4900 4901 if (keep) { 4902 // Notify battery stats service about this network, both the normal 4903 // interface and any stacked links. 4904 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4905 try { 4906 final IBatteryStats bs = BatteryStatsService.getService(); 4907 final int type = newNetwork.networkInfo.getType(); 4908 4909 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4910 bs.noteNetworkInterfaceType(baseIface, type); 4911 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4912 final String stackedIface = stacked.getInterfaceName(); 4913 bs.noteNetworkInterfaceType(stackedIface, type); 4914 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4915 } 4916 } catch (RemoteException ignored) { 4917 } 4918 4919 // This has to happen after the notifyNetworkCallbacks as that tickles each 4920 // ConnectivityManager instance so that legacy requests correctly bind dns 4921 // requests to this network. The legacy users are listening for this bcast 4922 // and will generally do a dns request so they can ensureRouteToHost and if 4923 // they do that before the callbacks happen they'll use the default network. 4924 // 4925 // TODO: Is there still a race here? We send the broadcast 4926 // after sending the callback, but if the app can receive the 4927 // broadcast before the callback, it might still break. 4928 // 4929 // This *does* introduce a race where if the user uses the new api 4930 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4931 // they may get old info. Reverse this after the old startUsing api is removed. 4932 // This is on top of the multiple intent sequencing referenced in the todo above. 4933 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 4934 NetworkRequest nr = newNetwork.requestAt(i); 4935 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 4936 // legacy type tracker filters out repeat adds 4937 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4938 } 4939 } 4940 4941 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4942 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4943 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4944 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4945 if (newNetwork.isVPN()) { 4946 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4947 } 4948 } 4949 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4950 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4951 if (unneeded(nai)) { 4952 if (nai.getLingerExpiry() > 0) { 4953 // This network has active linger timers and no requests, but is not 4954 // lingering. Linger it. 4955 // 4956 // One way (the only way?) this can happen if this network is unvalidated 4957 // and became unneeded due to another network improving its score to the 4958 // point where this network will no longer be able to satisfy any requests 4959 // even if it validates. 4960 updateLingerState(nai, now); 4961 } else { 4962 if (DBG) log("Reaping " + nai.name()); 4963 teardownUnneededNetwork(nai); 4964 } 4965 } 4966 } 4967 } 4968 } 4969 4970 /** 4971 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4972 * being disconnected. 4973 * @param changed If only one Network's score or capabilities have been modified since the last 4974 * time this function was called, pass this Network in this argument, otherwise pass 4975 * null. 4976 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4977 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4978 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4979 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4980 * network's score. 4981 */ 4982 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4983 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4984 // to avoid the slowness. It is not simply enough to process just "changed", for 4985 // example in the case where "changed"'s score decreases and another network should begin 4986 // satifying a NetworkRequest that "changed" currently satisfies. 4987 4988 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4989 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4990 // rematchNetworkAndRequests() handles. 4991 final long now = SystemClock.elapsedRealtime(); 4992 if (changed != null && oldScore < changed.getCurrentScore()) { 4993 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 4994 } else { 4995 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4996 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4997 // Rematch higher scoring networks first to prevent requests first matching a lower 4998 // scoring network and then a higher scoring network, which could produce multiple 4999 // callbacks and inadvertently unlinger networks. 5000 Arrays.sort(nais); 5001 for (NetworkAgentInfo nai : nais) { 5002 rematchNetworkAndRequests(nai, 5003 // Only reap the last time through the loop. Reaping before all rematching 5004 // is complete could incorrectly teardown a network that hasn't yet been 5005 // rematched. 5006 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 5007 : ReapUnvalidatedNetworks.REAP, 5008 now); 5009 } 5010 } 5011 } 5012 5013 private void updateInetCondition(NetworkAgentInfo nai) { 5014 // Don't bother updating until we've graduated to validated at least once. 5015 if (!nai.everValidated) return; 5016 // For now only update icons for default connection. 5017 // TODO: Update WiFi and cellular icons separately. b/17237507 5018 if (!isDefaultNetwork(nai)) return; 5019 5020 int newInetCondition = nai.lastValidated ? 100 : 0; 5021 // Don't repeat publish. 5022 if (newInetCondition == mDefaultInetConditionPublished) return; 5023 5024 mDefaultInetConditionPublished = newInetCondition; 5025 sendInetConditionBroadcast(nai.networkInfo); 5026 } 5027 5028 private void notifyLockdownVpn(NetworkAgentInfo nai) { 5029 if (mLockdownTracker != null) { 5030 if (nai != null && nai.isVPN()) { 5031 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 5032 } else { 5033 mLockdownTracker.onNetworkInfoChanged(); 5034 } 5035 } 5036 } 5037 5038 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 5039 NetworkInfo.State state = newInfo.getState(); 5040 NetworkInfo oldInfo = null; 5041 final int oldScore = networkAgent.getCurrentScore(); 5042 synchronized (networkAgent) { 5043 oldInfo = networkAgent.networkInfo; 5044 networkAgent.networkInfo = newInfo; 5045 } 5046 notifyLockdownVpn(networkAgent); 5047 5048 if (oldInfo != null && oldInfo.getState() == state) { 5049 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 5050 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 5051 notifyIfacesChangedForNetworkStats(); 5052 } else if (VDBG) log("ignoring duplicate network state non-change"); 5053 // In either case, no further work should be needed. 5054 return; 5055 } 5056 if (DBG) { 5057 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 5058 (oldInfo == null ? "null" : oldInfo.getState()) + 5059 " to " + state); 5060 } 5061 5062 if (!networkAgent.created 5063 && (state == NetworkInfo.State.CONNECTED 5064 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 5065 try { 5066 // This should never fail. Specifying an already in use NetID will cause failure. 5067 if (networkAgent.isVPN()) { 5068 mNetd.createVirtualNetwork(networkAgent.network.netId, 5069 !networkAgent.linkProperties.getDnsServers().isEmpty(), 5070 (networkAgent.networkMisc == null || 5071 !networkAgent.networkMisc.allowBypass)); 5072 } else { 5073 mNetd.createPhysicalNetwork(networkAgent.network.netId, 5074 networkAgent.networkCapabilities.hasCapability( 5075 NET_CAPABILITY_NOT_RESTRICTED) ? 5076 null : NetworkManagementService.PERMISSION_SYSTEM); 5077 } 5078 } catch (Exception e) { 5079 loge("Error creating network " + networkAgent.network.netId + ": " 5080 + e.getMessage()); 5081 return; 5082 } 5083 networkAgent.created = true; 5084 } 5085 5086 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 5087 networkAgent.everConnected = true; 5088 5089 updateLinkProperties(networkAgent, null); 5090 notifyIfacesChangedForNetworkStats(); 5091 5092 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 5093 scheduleUnvalidatedPrompt(networkAgent); 5094 5095 if (networkAgent.isVPN()) { 5096 // Temporarily disable the default proxy (not global). 5097 synchronized (mProxyLock) { 5098 if (!mDefaultProxyDisabled) { 5099 mDefaultProxyDisabled = true; 5100 if (mGlobalProxy == null && mDefaultProxy != null) { 5101 sendProxyBroadcast(null); 5102 } 5103 } 5104 } 5105 // TODO: support proxy per network. 5106 } 5107 5108 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5109 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5110 // capabilities, so it only needs to be done once on initial connect, not every time the 5111 // network's capabilities change. Note that we do this before rematching the network, 5112 // so we could decide to tear it down immediately afterwards. That's fine though - on 5113 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5114 // doing. 5115 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5116 5117 // Consider network even though it is not yet validated. 5118 final long now = SystemClock.elapsedRealtime(); 5119 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5120 5121 // This has to happen after matching the requests, because callbacks are just requests. 5122 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5123 } else if (state == NetworkInfo.State.DISCONNECTED) { 5124 networkAgent.asyncChannel.disconnect(); 5125 if (networkAgent.isVPN()) { 5126 synchronized (mProxyLock) { 5127 if (mDefaultProxyDisabled) { 5128 mDefaultProxyDisabled = false; 5129 if (mGlobalProxy == null && mDefaultProxy != null) { 5130 sendProxyBroadcast(mDefaultProxy); 5131 } 5132 } 5133 } 5134 } 5135 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5136 state == NetworkInfo.State.SUSPENDED) { 5137 // going into or coming out of SUSPEND: rescore and notify 5138 if (networkAgent.getCurrentScore() != oldScore) { 5139 rematchAllNetworksAndRequests(networkAgent, oldScore); 5140 } 5141 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5142 ConnectivityManager.CALLBACK_SUSPENDED : 5143 ConnectivityManager.CALLBACK_RESUMED)); 5144 mLegacyTypeTracker.update(networkAgent); 5145 } 5146 } 5147 5148 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5149 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5150 if (score < 0) { 5151 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5152 "). Bumping score to min of 0"); 5153 score = 0; 5154 } 5155 5156 final int oldScore = nai.getCurrentScore(); 5157 nai.setCurrentScore(score); 5158 5159 rematchAllNetworksAndRequests(nai, oldScore); 5160 5161 sendUpdatedScoreToFactories(nai); 5162 } 5163 5164 // notify only this one new request of the current state 5165 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5166 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 5167 if (nri.mPendingIntent == null) { 5168 callCallbackForRequest(nri, nai, notifyType, 0); 5169 } else { 5170 sendPendingIntentForRequest(nri, nai, notifyType); 5171 } 5172 } 5173 5174 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5175 // The NetworkInfo we actually send out has no bearing on the real 5176 // state of affairs. For example, if the default connection is mobile, 5177 // and a request for HIPRI has just gone away, we need to pretend that 5178 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5179 // the state to DISCONNECTED, even though the network is of type MOBILE 5180 // and is still connected. 5181 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5182 info.setType(type); 5183 if (state != DetailedState.DISCONNECTED) { 5184 info.setDetailedState(state, null, info.getExtraInfo()); 5185 sendConnectedBroadcast(info); 5186 } else { 5187 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5188 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5189 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5190 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5191 if (info.isFailover()) { 5192 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5193 nai.networkInfo.setFailover(false); 5194 } 5195 if (info.getReason() != null) { 5196 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5197 } 5198 if (info.getExtraInfo() != null) { 5199 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5200 } 5201 NetworkAgentInfo newDefaultAgent = null; 5202 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5203 newDefaultAgent = getDefaultNetwork(); 5204 if (newDefaultAgent != null) { 5205 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5206 newDefaultAgent.networkInfo); 5207 } else { 5208 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5209 } 5210 } 5211 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5212 mDefaultInetConditionPublished); 5213 sendStickyBroadcast(intent); 5214 if (newDefaultAgent != null) { 5215 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5216 } 5217 } 5218 } 5219 5220 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5221 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5222 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5223 NetworkRequest nr = networkAgent.requestAt(i); 5224 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5225 if (VDBG) log(" sending notification for " + nr); 5226 if (nri.mPendingIntent == null) { 5227 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5228 } else { 5229 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5230 } 5231 } 5232 } 5233 5234 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5235 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5236 } 5237 5238 private String notifyTypeToName(int notifyType) { 5239 switch (notifyType) { 5240 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5241 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5242 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5243 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5244 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5245 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5246 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5247 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5248 } 5249 return "UNKNOWN"; 5250 } 5251 5252 /** 5253 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5254 * properties tracked by NetworkStatsService on an active iface has changed. 5255 */ 5256 private void notifyIfacesChangedForNetworkStats() { 5257 try { 5258 mStatsService.forceUpdateIfaces(); 5259 } catch (Exception ignored) { 5260 } 5261 } 5262 5263 @Override 5264 public boolean addVpnAddress(String address, int prefixLength) { 5265 throwIfLockdownEnabled(); 5266 int user = UserHandle.getUserId(Binder.getCallingUid()); 5267 synchronized (mVpns) { 5268 return mVpns.get(user).addAddress(address, prefixLength); 5269 } 5270 } 5271 5272 @Override 5273 public boolean removeVpnAddress(String address, int prefixLength) { 5274 throwIfLockdownEnabled(); 5275 int user = UserHandle.getUserId(Binder.getCallingUid()); 5276 synchronized (mVpns) { 5277 return mVpns.get(user).removeAddress(address, prefixLength); 5278 } 5279 } 5280 5281 @Override 5282 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5283 throwIfLockdownEnabled(); 5284 int user = UserHandle.getUserId(Binder.getCallingUid()); 5285 boolean success; 5286 synchronized (mVpns) { 5287 success = mVpns.get(user).setUnderlyingNetworks(networks); 5288 } 5289 if (success) { 5290 notifyIfacesChangedForNetworkStats(); 5291 } 5292 return success; 5293 } 5294 5295 @Override 5296 public String getCaptivePortalServerUrl() { 5297 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5298 } 5299 5300 @Override 5301 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5302 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5303 enforceKeepalivePermission(); 5304 mKeepaliveTracker.startNattKeepalive( 5305 getNetworkAgentInfoForNetwork(network), 5306 intervalSeconds, messenger, binder, 5307 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5308 } 5309 5310 @Override 5311 public void stopKeepalive(Network network, int slot) { 5312 mHandler.sendMessage(mHandler.obtainMessage( 5313 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5314 } 5315 5316 @Override 5317 public void factoryReset() { 5318 enforceConnectivityInternalPermission(); 5319 5320 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5321 return; 5322 } 5323 5324 final int userId = UserHandle.getCallingUserId(); 5325 5326 // Turn airplane mode off 5327 setAirplaneMode(false); 5328 5329 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5330 // Untether 5331 for (String tether : getTetheredIfaces()) { 5332 untether(tether); 5333 } 5334 } 5335 5336 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5337 // Remove always-on package 5338 synchronized (mVpns) { 5339 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5340 if (alwaysOnPackage != null) { 5341 setAlwaysOnVpnPackage(userId, null, false); 5342 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5343 } 5344 } 5345 5346 // Turn VPN off 5347 VpnConfig vpnConfig = getVpnConfig(userId); 5348 if (vpnConfig != null) { 5349 if (vpnConfig.legacy) { 5350 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5351 } else { 5352 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5353 // in the future without user intervention. 5354 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5355 5356 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5357 } 5358 } 5359 } 5360 } 5361 5362 @VisibleForTesting 5363 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5364 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5365 return new NetworkMonitor(context, handler, nai, defaultRequest); 5366 } 5367 5368 @VisibleForTesting 5369 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5370 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5371 } 5372 5373 private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5374 int newNetid = NETID_UNSET; 5375 int prevNetid = NETID_UNSET; 5376 int[] transports = new int[0]; 5377 boolean hadIPv4 = false; 5378 boolean hadIPv6 = false; 5379 5380 if (newNai != null) { 5381 newNetid = newNai.network.netId; 5382 transports = newNai.networkCapabilities.getTransportTypes(); 5383 } 5384 if (prevNai != null) { 5385 prevNetid = prevNai.network.netId; 5386 final LinkProperties lp = prevNai.linkProperties; 5387 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5388 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5389 } 5390 5391 mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); 5392 } 5393 5394 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5395 mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); 5396 } 5397} 5398