ConnectivityService.java revision 2633c316893db289b67363f3f51aa90c716dd629
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_FOREGROUND; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 31import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 32import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 33import static android.net.NetworkPolicyManager.RULE_ALLOW_METERED; 34import static android.net.NetworkPolicyManager.RULE_NONE; 35import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 36import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 37import static android.net.NetworkPolicyManager.RULE_TEMPORARY_ALLOW_METERED; 38import static android.net.NetworkPolicyManager.uidRulesToString; 39 40import android.annotation.Nullable; 41import android.app.BroadcastOptions; 42import android.app.NotificationManager; 43import android.app.PendingIntent; 44import android.content.BroadcastReceiver; 45import android.content.ContentResolver; 46import android.content.Context; 47import android.content.Intent; 48import android.content.IntentFilter; 49import android.content.pm.PackageManager; 50import android.content.res.Configuration; 51import android.content.res.Resources; 52import android.database.ContentObserver; 53import android.net.ConnectivityManager; 54import android.net.ConnectivityManager.PacketKeepalive; 55import android.net.IConnectivityManager; 56import android.net.INetworkManagementEventObserver; 57import android.net.INetworkPolicyListener; 58import android.net.INetworkPolicyManager; 59import android.net.INetworkStatsService; 60import android.net.LinkProperties; 61import android.net.LinkProperties.CompareResult; 62import android.net.Network; 63import android.net.NetworkAgent; 64import android.net.NetworkCapabilities; 65import android.net.NetworkConfig; 66import android.net.NetworkInfo; 67import android.net.NetworkInfo.DetailedState; 68import android.net.NetworkMisc; 69import android.net.NetworkQuotaInfo; 70import android.net.NetworkRequest; 71import android.net.NetworkState; 72import android.net.NetworkUtils; 73import android.net.Proxy; 74import android.net.ProxyInfo; 75import android.net.RouteInfo; 76import android.net.UidRange; 77import android.net.Uri; 78import android.net.metrics.DefaultNetworkEvent; 79import android.net.metrics.IpConnectivityLog; 80import android.net.metrics.NetworkEvent; 81import android.os.Binder; 82import android.os.Build; 83import android.os.Bundle; 84import android.os.FileUtils; 85import android.os.Handler; 86import android.os.HandlerThread; 87import android.os.IBinder; 88import android.os.INetworkManagementService; 89import android.os.Looper; 90import android.os.Message; 91import android.os.Messenger; 92import android.os.ParcelFileDescriptor; 93import android.os.PowerManager; 94import android.os.Process; 95import android.os.RemoteException; 96import android.os.ResultReceiver; 97import android.os.SystemClock; 98import android.os.SystemProperties; 99import android.os.UserHandle; 100import android.os.UserManager; 101import android.provider.Settings; 102import android.security.Credentials; 103import android.security.KeyStore; 104import android.telephony.TelephonyManager; 105import android.text.TextUtils; 106import android.util.ArraySet; 107import android.util.LocalLog; 108import android.util.LocalLog.ReadOnlyLocalLog; 109import android.util.Log; 110import android.util.Pair; 111import android.util.Slog; 112import android.util.SparseArray; 113import android.util.SparseBooleanArray; 114import android.util.SparseIntArray; 115import android.util.Xml; 116 117import com.android.internal.R; 118import com.android.internal.annotations.GuardedBy; 119import com.android.internal.annotations.VisibleForTesting; 120import com.android.internal.app.IBatteryStats; 121import com.android.internal.net.LegacyVpnInfo; 122import com.android.internal.net.NetworkStatsFactory; 123import com.android.internal.net.VpnConfig; 124import com.android.internal.net.VpnInfo; 125import com.android.internal.net.VpnProfile; 126import com.android.internal.util.AsyncChannel; 127import com.android.internal.util.IndentingPrintWriter; 128import com.android.internal.util.MessageUtils; 129import com.android.internal.util.WakeupMessage; 130import com.android.internal.util.XmlUtils; 131import com.android.server.am.BatteryStatsService; 132import com.android.server.connectivity.DataConnectionStats; 133import com.android.server.connectivity.KeepaliveTracker; 134import com.android.server.connectivity.Nat464Xlat; 135import com.android.server.connectivity.LingerMonitor; 136import com.android.server.connectivity.NetworkAgentInfo; 137import com.android.server.connectivity.NetworkDiagnostics; 138import com.android.server.connectivity.NetworkMonitor; 139import com.android.server.connectivity.NetworkNotificationManager; 140import com.android.server.connectivity.NetworkNotificationManager.NotificationType; 141import com.android.server.connectivity.PacManager; 142import com.android.server.connectivity.PermissionMonitor; 143import com.android.server.connectivity.Tethering; 144import com.android.server.connectivity.Vpn; 145import com.android.server.net.BaseNetworkObserver; 146import com.android.server.net.LockdownVpnTracker; 147 148import com.google.android.collect.Lists; 149 150import org.xmlpull.v1.XmlPullParser; 151import org.xmlpull.v1.XmlPullParserException; 152 153import java.io.File; 154import java.io.FileDescriptor; 155import java.io.FileNotFoundException; 156import java.io.FileReader; 157import java.io.IOException; 158import java.io.PrintWriter; 159import java.net.Inet4Address; 160import java.net.InetAddress; 161import java.net.UnknownHostException; 162import java.util.ArrayDeque; 163import java.util.ArrayList; 164import java.util.Arrays; 165import java.util.Collection; 166import java.util.HashMap; 167import java.util.HashSet; 168import java.util.List; 169import java.util.Map; 170import java.util.Objects; 171import java.util.SortedSet; 172import java.util.TreeSet; 173 174/** 175 * @hide 176 */ 177public class ConnectivityService extends IConnectivityManager.Stub 178 implements PendingIntent.OnFinished { 179 private static final String TAG = ConnectivityService.class.getSimpleName(); 180 181 private static final boolean DBG = true; 182 private static final boolean VDBG = false; 183 184 private static final boolean LOGD_RULES = false; 185 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 186 187 // TODO: create better separation between radio types and network types 188 189 // how long to wait before switching back to a radio's default network 190 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 191 // system property that can override the above value 192 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 193 "android.telephony.apn-restore"; 194 195 // How long to wait before putting up a "This network doesn't have an Internet connection, 196 // connect anyway?" dialog after the user selects a network that doesn't validate. 197 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 198 199 // Default to 30s linger time-out. Modifiable only for testing. 200 private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; 201 private static final int DEFAULT_LINGER_DELAY_MS = 30_000; 202 @VisibleForTesting 203 protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it. 204 205 // How long to delay to removal of a pending intent based request. 206 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 207 private final int mReleasePendingIntentDelayMs; 208 209 private Tethering mTethering; 210 211 private final PermissionMonitor mPermissionMonitor; 212 213 private KeyStore mKeyStore; 214 215 @GuardedBy("mVpns") 216 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 217 218 private boolean mLockdownEnabled; 219 private LockdownVpnTracker mLockdownTracker; 220 221 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 222 private Object mRulesLock = new Object(); 223 /** Currently active network rules by UID. */ 224 @GuardedBy("mRulesLock") 225 private SparseIntArray mUidRules = new SparseIntArray(); 226 /** Set of ifaces that are costly. */ 227 @GuardedBy("mRulesLock") 228 private ArraySet<String> mMeteredIfaces = new ArraySet<>(); 229 /** Flag indicating if background data is restricted. */ 230 @GuardedBy("mRulesLock") 231 private boolean mRestrictBackground; 232 233 final private Context mContext; 234 private int mNetworkPreference; 235 // 0 is full bad, 100 is full good 236 private int mDefaultInetConditionPublished = 0; 237 238 private int mNumDnsEntries; 239 240 private boolean mTestMode; 241 private static ConnectivityService sServiceInstance; 242 243 private INetworkManagementService mNetd; 244 private INetworkStatsService mStatsService; 245 private INetworkPolicyManager mPolicyManager; 246 247 private String mCurrentTcpBufferSizes; 248 249 private static final int ENABLED = 1; 250 private static final int DISABLED = 0; 251 252 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 253 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class, 254 NetworkAgentInfo.class }); 255 256 private enum ReapUnvalidatedNetworks { 257 // Tear down networks that have no chance (e.g. even if validated) of becoming 258 // the highest scoring network satisfying a NetworkRequest. This should be passed when 259 // all networks have been rematched against all NetworkRequests. 260 REAP, 261 // Don't reap networks. This should be passed when some networks have not yet been 262 // rematched against all NetworkRequests. 263 DONT_REAP 264 }; 265 266 private enum UnneededFor { 267 LINGER, // Determine whether this network is unneeded and should be lingered. 268 TEARDOWN, // Determine whether this network is unneeded and should be torn down. 269 } 270 271 /** 272 * used internally to change our mobile data enabled flag 273 */ 274 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 275 276 /** 277 * used internally to clear a wakelock when transitioning 278 * from one net to another. Clear happens when we get a new 279 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 280 * after a timeout if no network is found (typically 1 min). 281 */ 282 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 283 284 /** 285 * used internally to reload global proxy settings 286 */ 287 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 288 289 /** 290 * PAC manager has received new port. 291 */ 292 private static final int EVENT_PROXY_HAS_CHANGED = 16; 293 294 /** 295 * used internally when registering NetworkFactories 296 * obj = NetworkFactoryInfo 297 */ 298 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 299 300 /** 301 * used internally when registering NetworkAgents 302 * obj = Messenger 303 */ 304 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 305 306 /** 307 * used to add a network request 308 * includes a NetworkRequestInfo 309 */ 310 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 311 312 /** 313 * indicates a timeout period is over - check if we had a network yet or not 314 * and if not, call the timeout callback (but leave the request live until they 315 * cancel it. 316 * includes a NetworkRequestInfo 317 */ 318 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 319 320 /** 321 * used to add a network listener - no request 322 * includes a NetworkRequestInfo 323 */ 324 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 325 326 /** 327 * used to remove a network request, either a listener or a real request 328 * arg1 = UID of caller 329 * obj = NetworkRequest 330 */ 331 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 332 333 /** 334 * used internally when registering NetworkFactories 335 * obj = Messenger 336 */ 337 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 338 339 /** 340 * used internally to expire a wakelock when transitioning 341 * from one net to another. Expire happens when we fail to find 342 * a new network (typically after 1 minute) - 343 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 344 * a replacement network. 345 */ 346 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 347 348 /** 349 * Used internally to indicate the system is ready. 350 */ 351 private static final int EVENT_SYSTEM_READY = 25; 352 353 /** 354 * used to add a network request with a pending intent 355 * obj = NetworkRequestInfo 356 */ 357 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 358 359 /** 360 * used to remove a pending intent and its associated network request. 361 * arg1 = UID of caller 362 * obj = PendingIntent 363 */ 364 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 365 366 /** 367 * used to specify whether a network should be used even if unvalidated. 368 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 369 * arg2 = whether to remember this choice in the future (1 or 0) 370 * obj = network 371 */ 372 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 373 374 /** 375 * used to ask the user to confirm a connection to an unvalidated network. 376 * obj = network 377 */ 378 private static final int EVENT_PROMPT_UNVALIDATED = 29; 379 380 /** 381 * used internally to (re)configure mobile data always-on settings. 382 */ 383 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 384 385 /** 386 * used to add a network listener with a pending intent 387 * obj = NetworkRequestInfo 388 */ 389 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 390 391 /** 392 * Indicates a caller has requested to have its callback invoked with 393 * the latest LinkProperties or NetworkCapabilities. 394 * 395 * arg1 = UID of caller 396 * obj = NetworkRequest 397 */ 398 private static final int EVENT_REQUEST_LINKPROPERTIES = 32; 399 private static final int EVENT_REQUEST_NETCAPABILITIES = 33; 400 401 /** 402 * Used internally to (re)configure avoid bad wifi setting. 403 */ 404 private static final int EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI = 34; 405 406 /** Handler thread used for both of the handlers below. */ 407 @VisibleForTesting 408 protected final HandlerThread mHandlerThread; 409 /** Handler used for internal events. */ 410 final private InternalHandler mHandler; 411 /** Handler used for incoming {@link NetworkStateTracker} events. */ 412 final private NetworkStateTrackerHandler mTrackerHandler; 413 414 private boolean mSystemReady; 415 private Intent mInitialBroadcast; 416 417 private PowerManager.WakeLock mNetTransitionWakeLock; 418 private String mNetTransitionWakeLockCausedBy = ""; 419 private int mNetTransitionWakeLockSerialNumber; 420 private int mNetTransitionWakeLockTimeout; 421 private final PowerManager.WakeLock mPendingIntentWakeLock; 422 423 // used in DBG mode to track inet condition reports 424 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 425 private ArrayList mInetLog; 426 427 // track the current default http proxy - tell the world if we get a new one (real change) 428 private volatile ProxyInfo mDefaultProxy = null; 429 private Object mProxyLock = new Object(); 430 private boolean mDefaultProxyDisabled = false; 431 432 // track the global proxy. 433 private ProxyInfo mGlobalProxy = null; 434 435 private PacManager mPacManager = null; 436 437 final private SettingsObserver mSettingsObserver; 438 439 private UserManager mUserManager; 440 441 NetworkConfig[] mNetConfigs; 442 int mNetworksDefined; 443 444 // the set of network types that can only be enabled by system/sig apps 445 List mProtectedNetworks; 446 447 private DataConnectionStats mDataConnectionStats; 448 449 TelephonyManager mTelephonyManager; 450 451 private KeepaliveTracker mKeepaliveTracker; 452 private NetworkNotificationManager mNotifier; 453 private LingerMonitor mLingerMonitor; 454 455 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 456 private final static int MIN_NET_ID = 100; // some reserved marks 457 private final static int MAX_NET_ID = 65535; 458 private int mNextNetId = MIN_NET_ID; 459 460 // sequence number of NetworkRequests 461 private int mNextNetworkRequestId = 1; 462 463 // NetworkRequest activity String log entries. 464 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 465 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 466 467 // NetworkInfo blocked and unblocked String log entries 468 // TODO: consider reducing memory usage. Each log line is ~40 2B chars, for a total of ~8kB. 469 private static final int MAX_NETWORK_INFO_LOGS = 100; 470 private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); 471 472 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 473 private static final int MAX_VALIDATION_LOGS = 10; 474 private static class ValidationLog { 475 final Network mNetwork; 476 final String mNetworkExtraInfo; 477 final ReadOnlyLocalLog mLog; 478 479 ValidationLog(Network network, String networkExtraInfo, ReadOnlyLocalLog log) { 480 mNetwork = network; 481 mNetworkExtraInfo = networkExtraInfo; 482 mLog = log; 483 } 484 } 485 private final ArrayDeque<ValidationLog> mValidationLogs = 486 new ArrayDeque<ValidationLog>(MAX_VALIDATION_LOGS); 487 488 private void addValidationLogs(ReadOnlyLocalLog log, Network network, String networkExtraInfo) { 489 synchronized(mValidationLogs) { 490 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 491 mValidationLogs.removeLast(); 492 } 493 mValidationLogs.addFirst(new ValidationLog(network, networkExtraInfo, log)); 494 } 495 } 496 497 private final IpConnectivityLog mMetricsLog; 498 499 /** 500 * Implements support for the legacy "one network per network type" model. 501 * 502 * We used to have a static array of NetworkStateTrackers, one for each 503 * network type, but that doesn't work any more now that we can have, 504 * for example, more that one wifi network. This class stores all the 505 * NetworkAgentInfo objects that support a given type, but the legacy 506 * API will only see the first one. 507 * 508 * It serves two main purposes: 509 * 510 * 1. Provide information about "the network for a given type" (since this 511 * API only supports one). 512 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 513 * the first network for a given type changes, or if the default network 514 * changes. 515 */ 516 private class LegacyTypeTracker { 517 518 private static final boolean DBG = true; 519 private static final boolean VDBG = false; 520 521 /** 522 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 523 * Each list holds references to all NetworkAgentInfos that are used to 524 * satisfy requests for that network type. 525 * 526 * This array is built out at startup such that an unsupported network 527 * doesn't get an ArrayList instance, making this a tristate: 528 * unsupported, supported but not active and active. 529 * 530 * The actual lists are populated when we scan the network types that 531 * are supported on this device. 532 * 533 * Threading model: 534 * - addSupportedType() is only called in the constructor 535 * - add(), update(), remove() are only called from the ConnectivityService handler thread. 536 * They are therefore not thread-safe with respect to each other. 537 * - getNetworkForType() can be called at any time on binder threads. It is synchronized 538 * on mTypeLists to be thread-safe with respect to a concurrent remove call. 539 * - dump is thread-safe with respect to concurrent add and remove calls. 540 */ 541 private final ArrayList<NetworkAgentInfo> mTypeLists[]; 542 543 public LegacyTypeTracker() { 544 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 545 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 546 } 547 548 public void addSupportedType(int type) { 549 if (mTypeLists[type] != null) { 550 throw new IllegalStateException( 551 "legacy list for type " + type + "already initialized"); 552 } 553 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 554 } 555 556 public boolean isTypeSupported(int type) { 557 return isNetworkTypeValid(type) && mTypeLists[type] != null; 558 } 559 560 public NetworkAgentInfo getNetworkForType(int type) { 561 synchronized (mTypeLists) { 562 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 563 return mTypeLists[type].get(0); 564 } 565 } 566 return null; 567 } 568 569 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 570 boolean isDefaultNetwork) { 571 if (DBG) { 572 log("Sending " + state + 573 " broadcast for type " + type + " " + nai.name() + 574 " isDefaultNetwork=" + isDefaultNetwork); 575 } 576 } 577 578 /** Adds the given network to the specified legacy type list. */ 579 public void add(int type, NetworkAgentInfo nai) { 580 if (!isTypeSupported(type)) { 581 return; // Invalid network type. 582 } 583 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 584 585 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 586 if (list.contains(nai)) { 587 return; 588 } 589 synchronized (mTypeLists) { 590 list.add(nai); 591 } 592 593 // Send a broadcast if this is the first network of its type or if it's the default. 594 final boolean isDefaultNetwork = isDefaultNetwork(nai); 595 if ((list.size() == 1) || isDefaultNetwork) { 596 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 597 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 598 } 599 } 600 601 /** Removes the given network from the specified legacy type list. */ 602 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 603 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 604 if (list == null || list.isEmpty()) { 605 return; 606 } 607 final boolean wasFirstNetwork = list.get(0).equals(nai); 608 609 synchronized (mTypeLists) { 610 if (!list.remove(nai)) { 611 return; 612 } 613 } 614 615 final DetailedState state = DetailedState.DISCONNECTED; 616 617 if (wasFirstNetwork || wasDefault) { 618 maybeLogBroadcast(nai, state, type, wasDefault); 619 sendLegacyNetworkBroadcast(nai, state, type); 620 } 621 622 if (!list.isEmpty() && wasFirstNetwork) { 623 if (DBG) log("Other network available for type " + type + 624 ", sending connected broadcast"); 625 final NetworkAgentInfo replacement = list.get(0); 626 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 627 sendLegacyNetworkBroadcast(replacement, state, type); 628 } 629 } 630 631 /** Removes the given network from all legacy type lists. */ 632 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 633 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 634 for (int type = 0; type < mTypeLists.length; type++) { 635 remove(type, nai, wasDefault); 636 } 637 } 638 639 // send out another legacy broadcast - currently only used for suspend/unsuspend 640 // toggle 641 public void update(NetworkAgentInfo nai) { 642 final boolean isDefault = isDefaultNetwork(nai); 643 final DetailedState state = nai.networkInfo.getDetailedState(); 644 for (int type = 0; type < mTypeLists.length; type++) { 645 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 646 final boolean contains = (list != null && list.contains(nai)); 647 final boolean isFirst = contains && (nai == list.get(0)); 648 if (isFirst || contains && isDefault) { 649 maybeLogBroadcast(nai, state, type, isDefault); 650 sendLegacyNetworkBroadcast(nai, state, type); 651 } 652 } 653 } 654 655 private String naiToString(NetworkAgentInfo nai) { 656 String name = (nai != null) ? nai.name() : "null"; 657 String state = (nai.networkInfo != null) ? 658 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 659 "???/???"; 660 return name + " " + state; 661 } 662 663 public void dump(IndentingPrintWriter pw) { 664 pw.println("mLegacyTypeTracker:"); 665 pw.increaseIndent(); 666 pw.print("Supported types:"); 667 for (int type = 0; type < mTypeLists.length; type++) { 668 if (mTypeLists[type] != null) pw.print(" " + type); 669 } 670 pw.println(); 671 pw.println("Current state:"); 672 pw.increaseIndent(); 673 synchronized (mTypeLists) { 674 for (int type = 0; type < mTypeLists.length; type++) { 675 if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; 676 for (NetworkAgentInfo nai : mTypeLists[type]) { 677 pw.println(type + " " + naiToString(nai)); 678 } 679 } 680 } 681 pw.decreaseIndent(); 682 pw.decreaseIndent(); 683 pw.println(); 684 } 685 } 686 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 687 688 @VisibleForTesting 689 protected HandlerThread createHandlerThread() { 690 return new HandlerThread("ConnectivityServiceThread"); 691 } 692 693 public ConnectivityService(Context context, INetworkManagementService netManager, 694 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 695 this(context, netManager, statsService, policyManager, new IpConnectivityLog()); 696 } 697 698 @VisibleForTesting 699 protected ConnectivityService(Context context, INetworkManagementService netManager, 700 INetworkStatsService statsService, INetworkPolicyManager policyManager, 701 IpConnectivityLog logger) { 702 if (DBG) log("ConnectivityService starting up"); 703 704 mMetricsLog = logger; 705 mDefaultRequest = createInternetRequestForTransport(-1, NetworkRequest.Type.REQUEST); 706 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); 707 mNetworkRequests.put(mDefaultRequest, defaultNRI); 708 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 709 710 mDefaultMobileDataRequest = createInternetRequestForTransport( 711 NetworkCapabilities.TRANSPORT_CELLULAR, NetworkRequest.Type.BACKGROUND_REQUEST); 712 713 mHandlerThread = createHandlerThread(); 714 mHandlerThread.start(); 715 mHandler = new InternalHandler(mHandlerThread.getLooper()); 716 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 717 718 // setup our unique device name 719 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 720 String id = Settings.Secure.getString(context.getContentResolver(), 721 Settings.Secure.ANDROID_ID); 722 if (id != null && id.length() > 0) { 723 String name = new String("android-").concat(id); 724 SystemProperties.set("net.hostname", name); 725 } 726 } 727 728 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 729 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 730 731 mLingerDelayMs = SystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); 732 733 mContext = checkNotNull(context, "missing Context"); 734 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 735 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 736 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 737 mKeyStore = KeyStore.getInstance(); 738 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 739 740 try { 741 mPolicyManager.setConnectivityListener(mPolicyListener); 742 mRestrictBackground = mPolicyManager.getRestrictBackground(); 743 } catch (RemoteException e) { 744 // ouch, no rules updates means some processes may never get network 745 loge("unable to register INetworkPolicyListener" + e); 746 } 747 748 final PowerManager powerManager = (PowerManager) context.getSystemService( 749 Context.POWER_SERVICE); 750 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 751 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 752 com.android.internal.R.integer.config_networkTransitionTimeout); 753 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 754 755 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 756 757 // TODO: What is the "correct" way to do determine if this is a wifi only device? 758 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 759 log("wifiOnly=" + wifiOnly); 760 String[] naStrings = context.getResources().getStringArray( 761 com.android.internal.R.array.networkAttributes); 762 for (String naString : naStrings) { 763 try { 764 NetworkConfig n = new NetworkConfig(naString); 765 if (VDBG) log("naString=" + naString + " config=" + n); 766 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 767 loge("Error in networkAttributes - ignoring attempt to define type " + 768 n.type); 769 continue; 770 } 771 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 772 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 773 n.type); 774 continue; 775 } 776 if (mNetConfigs[n.type] != null) { 777 loge("Error in networkAttributes - ignoring attempt to redefine type " + 778 n.type); 779 continue; 780 } 781 mLegacyTypeTracker.addSupportedType(n.type); 782 783 mNetConfigs[n.type] = n; 784 mNetworksDefined++; 785 } catch(Exception e) { 786 // ignore it - leave the entry null 787 } 788 } 789 790 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 791 if (mNetConfigs[TYPE_VPN] == null) { 792 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 793 // don't need to add TYPE_VPN to mNetConfigs. 794 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 795 mNetworksDefined++; // used only in the log() statement below. 796 } 797 798 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 799 800 mProtectedNetworks = new ArrayList<Integer>(); 801 int[] protectedNetworks = context.getResources().getIntArray( 802 com.android.internal.R.array.config_protectedNetworks); 803 for (int p : protectedNetworks) { 804 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 805 mProtectedNetworks.add(p); 806 } else { 807 if (DBG) loge("Ignoring protectedNetwork " + p); 808 } 809 } 810 811 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 812 && SystemProperties.get("ro.build.type").equals("eng"); 813 814 mTethering = new Tethering(mContext, mNetd, statsService); 815 816 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 817 818 //set up the listener for user state for creating user VPNs 819 IntentFilter intentFilter = new IntentFilter(); 820 intentFilter.addAction(Intent.ACTION_USER_STARTED); 821 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 822 intentFilter.addAction(Intent.ACTION_USER_ADDED); 823 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 824 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 825 mContext.registerReceiverAsUser( 826 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 827 828 try { 829 mNetd.registerObserver(mTethering); 830 mNetd.registerObserver(mDataActivityObserver); 831 } catch (RemoteException e) { 832 loge("Error registering observer :" + e); 833 } 834 835 if (DBG) { 836 mInetLog = new ArrayList(); 837 } 838 839 mSettingsObserver = new SettingsObserver(mContext, mHandler); 840 registerSettingsCallbacks(); 841 842 mDataConnectionStats = new DataConnectionStats(mContext); 843 mDataConnectionStats.startMonitoring(); 844 845 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 846 847 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 848 849 mKeepaliveTracker = new KeepaliveTracker(mHandler); 850 mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager, 851 mContext.getSystemService(NotificationManager.class)); 852 853 final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(), 854 Settings.Global.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT, 855 LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT); 856 final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(), 857 Settings.Global.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS, 858 LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS); 859 mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit); 860 861 intentFilter = new IntentFilter(); 862 intentFilter.addAction(Intent.ACTION_CONFIGURATION_CHANGED); 863 mContext.registerReceiverAsUser(new BroadcastReceiver() { 864 public void onReceive(Context context, Intent intent) { 865 mHandler.sendEmptyMessage(EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI); 866 } 867 }, UserHandle.ALL, intentFilter, null, null); 868 updateAvoidBadWifi(); 869 } 870 871 private NetworkRequest createInternetRequestForTransport( 872 int transportType, NetworkRequest.Type type) { 873 NetworkCapabilities netCap = new NetworkCapabilities(); 874 netCap.addCapability(NET_CAPABILITY_INTERNET); 875 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 876 if (transportType > -1) { 877 netCap.addTransportType(transportType); 878 } 879 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type); 880 } 881 882 // Used only for testing. 883 // TODO: Delete this and either: 884 // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires 885 // changing ContentResolver to make registerContentObserver non-final). 886 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 887 // by subclassing SettingsObserver. 888 @VisibleForTesting 889 void updateMobileDataAlwaysOn() { 890 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 891 } 892 893 private void handleMobileDataAlwaysOn() { 894 final boolean enable = (Settings.Global.getInt( 895 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 896 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 897 if (enable == isEnabled) { 898 return; // Nothing to do. 899 } 900 901 if (enable) { 902 handleRegisterNetworkRequest(new NetworkRequestInfo( 903 null, mDefaultMobileDataRequest, new Binder())); 904 } else { 905 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 906 } 907 } 908 909 private void registerSettingsCallbacks() { 910 // Watch for global HTTP proxy changes. 911 mSettingsObserver.observe( 912 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 913 EVENT_APPLY_GLOBAL_HTTP_PROXY); 914 915 // Watch for whether or not to keep mobile data always on. 916 mSettingsObserver.observe( 917 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 918 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 919 920 // Watch for whether to automatically switch away from wifi networks that lose Internet 921 // access. 922 mSettingsObserver.observe( 923 Settings.Global.getUriFor(Settings.Global.NETWORK_AVOID_BAD_WIFI), 924 EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI); 925 } 926 927 private synchronized int nextNetworkRequestId() { 928 return mNextNetworkRequestId++; 929 } 930 931 @VisibleForTesting 932 protected int reserveNetId() { 933 synchronized (mNetworkForNetId) { 934 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 935 int netId = mNextNetId; 936 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 937 // Make sure NetID unused. http://b/16815182 938 if (!mNetIdInUse.get(netId)) { 939 mNetIdInUse.put(netId, true); 940 return netId; 941 } 942 } 943 } 944 throw new IllegalStateException("No free netIds"); 945 } 946 947 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 948 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 949 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 950 final NetworkState state; 951 if (nai != null) { 952 state = nai.getNetworkState(); 953 state.networkInfo.setType(networkType); 954 } else { 955 final NetworkInfo info = new NetworkInfo(networkType, 0, 956 getNetworkTypeName(networkType), ""); 957 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 958 info.setIsAvailable(true); 959 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 960 null, null, null); 961 } 962 filterNetworkStateForUid(state, uid, ignoreBlocked); 963 return state; 964 } else { 965 return NetworkState.EMPTY; 966 } 967 } 968 969 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 970 if (network == null) { 971 return null; 972 } 973 synchronized (mNetworkForNetId) { 974 return mNetworkForNetId.get(network.netId); 975 } 976 } 977 978 private Network[] getVpnUnderlyingNetworks(int uid) { 979 if (!mLockdownEnabled) { 980 int user = UserHandle.getUserId(uid); 981 synchronized (mVpns) { 982 Vpn vpn = mVpns.get(user); 983 if (vpn != null && vpn.appliesToUid(uid)) { 984 return vpn.getUnderlyingNetworks(); 985 } 986 } 987 } 988 return null; 989 } 990 991 private NetworkState getUnfilteredActiveNetworkState(int uid) { 992 NetworkAgentInfo nai = getDefaultNetwork(); 993 994 final Network[] networks = getVpnUnderlyingNetworks(uid); 995 if (networks != null) { 996 // getUnderlyingNetworks() returns: 997 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 998 // empty array => the VPN explicitly said "no default network". 999 // non-empty array => the VPN specified one or more default networks; we use the 1000 // first one. 1001 if (networks.length > 0) { 1002 nai = getNetworkAgentInfoForNetwork(networks[0]); 1003 } else { 1004 nai = null; 1005 } 1006 } 1007 1008 if (nai != null) { 1009 return nai.getNetworkState(); 1010 } else { 1011 return NetworkState.EMPTY; 1012 } 1013 } 1014 1015 /** 1016 * Check if UID should be blocked from using the network with the given LinkProperties. 1017 */ 1018 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 1019 boolean ignoreBlocked) { 1020 // Networks aren't blocked when ignoring blocked status 1021 if (ignoreBlocked) return false; 1022 // Networks are never blocked for system services 1023 if (isSystem(uid)) return false; 1024 1025 final boolean networkMetered; 1026 final int uidRules; 1027 1028 synchronized (mVpns) { 1029 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 1030 if (vpn != null && vpn.isBlockingUid(uid)) { 1031 return true; 1032 } 1033 } 1034 1035 final String iface = (lp == null ? "" : lp.getInterfaceName()); 1036 synchronized (mRulesLock) { 1037 networkMetered = mMeteredIfaces.contains(iface); 1038 uidRules = mUidRules.get(uid, RULE_NONE); 1039 } 1040 1041 boolean allowed = true; 1042 // Check Data Saver Mode first... 1043 if (networkMetered) { 1044 if ((uidRules & RULE_REJECT_METERED) != 0) { 1045 if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); 1046 // Explicitly blacklisted. 1047 allowed = false; 1048 } else { 1049 allowed = !mRestrictBackground 1050 || (uidRules & RULE_ALLOW_METERED) != 0 1051 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; 1052 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1053 + " mRestrictBackground=" + mRestrictBackground 1054 + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) 1055 + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" 1056 + ": " + allowed); 1057 } 1058 } 1059 // ...then power restrictions. 1060 if (allowed) { 1061 allowed = (uidRules & RULE_REJECT_ALL) == 0; 1062 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1063 + " rule is " + uidRulesToString(uidRules) + ": " + allowed); 1064 } 1065 return !allowed; 1066 } 1067 1068 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1069 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1070 return; 1071 } 1072 boolean removed = false; 1073 boolean added = false; 1074 synchronized (mBlockedAppUids) { 1075 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1076 added = true; 1077 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1078 removed = true; 1079 } 1080 } 1081 if (added) { 1082 log("Returning blocked NetworkInfo to uid=" + uid); 1083 mNetworkInfoBlockingLogs.log("BLOCKED " + uid); 1084 } else if (removed) { 1085 log("Returning unblocked NetworkInfo to uid=" + uid); 1086 mNetworkInfoBlockingLogs.log("UNBLOCKED " + uid); 1087 } 1088 } 1089 1090 /** 1091 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1092 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1093 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 1094 * {@link NetworkInfo#isMetered()} based on network policies. 1095 */ 1096 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1097 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1098 1099 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1100 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1101 } 1102 if (mLockdownTracker != null) { 1103 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1104 } 1105 1106 // TODO: apply metered state closer to NetworkAgentInfo 1107 final long token = Binder.clearCallingIdentity(); 1108 try { 1109 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 1110 } catch (RemoteException e) { 1111 } finally { 1112 Binder.restoreCallingIdentity(token); 1113 } 1114 } 1115 1116 /** 1117 * Return NetworkInfo for the active (i.e., connected) network interface. 1118 * It is assumed that at most one network is active at a time. If more 1119 * than one is active, it is indeterminate which will be returned. 1120 * @return the info for the active network, or {@code null} if none is 1121 * active 1122 */ 1123 @Override 1124 public NetworkInfo getActiveNetworkInfo() { 1125 enforceAccessPermission(); 1126 final int uid = Binder.getCallingUid(); 1127 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1128 filterNetworkStateForUid(state, uid, false); 1129 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1130 return state.networkInfo; 1131 } 1132 1133 @Override 1134 public Network getActiveNetwork() { 1135 enforceAccessPermission(); 1136 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1137 } 1138 1139 @Override 1140 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1141 enforceConnectivityInternalPermission(); 1142 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1143 } 1144 1145 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1146 final int user = UserHandle.getUserId(uid); 1147 int vpnNetId = NETID_UNSET; 1148 synchronized (mVpns) { 1149 final Vpn vpn = mVpns.get(user); 1150 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1151 } 1152 NetworkAgentInfo nai; 1153 if (vpnNetId != NETID_UNSET) { 1154 synchronized (mNetworkForNetId) { 1155 nai = mNetworkForNetId.get(vpnNetId); 1156 } 1157 if (nai != null) return nai.network; 1158 } 1159 nai = getDefaultNetwork(); 1160 if (nai != null 1161 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1162 nai = null; 1163 } 1164 return nai != null ? nai.network : null; 1165 } 1166 1167 // Public because it's used by mLockdownTracker. 1168 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1169 enforceAccessPermission(); 1170 final int uid = Binder.getCallingUid(); 1171 NetworkState state = getUnfilteredActiveNetworkState(uid); 1172 return state.networkInfo; 1173 } 1174 1175 @Override 1176 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1177 enforceConnectivityInternalPermission(); 1178 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1179 filterNetworkStateForUid(state, uid, ignoreBlocked); 1180 return state.networkInfo; 1181 } 1182 1183 @Override 1184 public NetworkInfo getNetworkInfo(int networkType) { 1185 enforceAccessPermission(); 1186 final int uid = Binder.getCallingUid(); 1187 if (getVpnUnderlyingNetworks(uid) != null) { 1188 // A VPN is active, so we may need to return one of its underlying networks. This 1189 // information is not available in LegacyTypeTracker, so we have to get it from 1190 // getUnfilteredActiveNetworkState. 1191 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1192 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1193 filterNetworkStateForUid(state, uid, false); 1194 return state.networkInfo; 1195 } 1196 } 1197 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1198 return state.networkInfo; 1199 } 1200 1201 @Override 1202 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1203 enforceAccessPermission(); 1204 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1205 if (nai != null) { 1206 final NetworkState state = nai.getNetworkState(); 1207 filterNetworkStateForUid(state, uid, ignoreBlocked); 1208 return state.networkInfo; 1209 } else { 1210 return null; 1211 } 1212 } 1213 1214 @Override 1215 public NetworkInfo[] getAllNetworkInfo() { 1216 enforceAccessPermission(); 1217 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1218 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1219 networkType++) { 1220 NetworkInfo info = getNetworkInfo(networkType); 1221 if (info != null) { 1222 result.add(info); 1223 } 1224 } 1225 return result.toArray(new NetworkInfo[result.size()]); 1226 } 1227 1228 @Override 1229 public Network getNetworkForType(int networkType) { 1230 enforceAccessPermission(); 1231 final int uid = Binder.getCallingUid(); 1232 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1233 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1234 return state.network; 1235 } 1236 return null; 1237 } 1238 1239 @Override 1240 public Network[] getAllNetworks() { 1241 enforceAccessPermission(); 1242 synchronized (mNetworkForNetId) { 1243 final Network[] result = new Network[mNetworkForNetId.size()]; 1244 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1245 result[i] = mNetworkForNetId.valueAt(i).network; 1246 } 1247 return result; 1248 } 1249 } 1250 1251 @Override 1252 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1253 // The basic principle is: if an app's traffic could possibly go over a 1254 // network, without the app doing anything multinetwork-specific, 1255 // (hence, by "default"), then include that network's capabilities in 1256 // the array. 1257 // 1258 // In the normal case, app traffic only goes over the system's default 1259 // network connection, so that's the only network returned. 1260 // 1261 // With a VPN in force, some app traffic may go into the VPN, and thus 1262 // over whatever underlying networks the VPN specifies, while other app 1263 // traffic may go over the system default network (e.g.: a split-tunnel 1264 // VPN, or an app disallowed by the VPN), so the set of networks 1265 // returned includes the VPN's underlying networks and the system 1266 // default. 1267 enforceAccessPermission(); 1268 1269 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1270 1271 NetworkAgentInfo nai = getDefaultNetwork(); 1272 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1273 if (nc != null) { 1274 result.put(nai.network, nc); 1275 } 1276 1277 if (!mLockdownEnabled) { 1278 synchronized (mVpns) { 1279 Vpn vpn = mVpns.get(userId); 1280 if (vpn != null) { 1281 Network[] networks = vpn.getUnderlyingNetworks(); 1282 if (networks != null) { 1283 for (Network network : networks) { 1284 nai = getNetworkAgentInfoForNetwork(network); 1285 nc = getNetworkCapabilitiesInternal(nai); 1286 if (nc != null) { 1287 result.put(network, nc); 1288 } 1289 } 1290 } 1291 } 1292 } 1293 } 1294 1295 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1296 out = result.values().toArray(out); 1297 return out; 1298 } 1299 1300 @Override 1301 public boolean isNetworkSupported(int networkType) { 1302 enforceAccessPermission(); 1303 return mLegacyTypeTracker.isTypeSupported(networkType); 1304 } 1305 1306 /** 1307 * Return LinkProperties for the active (i.e., connected) default 1308 * network interface. It is assumed that at most one default network 1309 * is active at a time. If more than one is active, it is indeterminate 1310 * which will be returned. 1311 * @return the ip properties for the active network, or {@code null} if 1312 * none is active 1313 */ 1314 @Override 1315 public LinkProperties getActiveLinkProperties() { 1316 enforceAccessPermission(); 1317 final int uid = Binder.getCallingUid(); 1318 NetworkState state = getUnfilteredActiveNetworkState(uid); 1319 return state.linkProperties; 1320 } 1321 1322 @Override 1323 public LinkProperties getLinkPropertiesForType(int networkType) { 1324 enforceAccessPermission(); 1325 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1326 if (nai != null) { 1327 synchronized (nai) { 1328 return new LinkProperties(nai.linkProperties); 1329 } 1330 } 1331 return null; 1332 } 1333 1334 // TODO - this should be ALL networks 1335 @Override 1336 public LinkProperties getLinkProperties(Network network) { 1337 enforceAccessPermission(); 1338 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1339 if (nai != null) { 1340 synchronized (nai) { 1341 return new LinkProperties(nai.linkProperties); 1342 } 1343 } 1344 return null; 1345 } 1346 1347 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1348 if (nai != null) { 1349 synchronized (nai) { 1350 if (nai.networkCapabilities != null) { 1351 return new NetworkCapabilities(nai.networkCapabilities); 1352 } 1353 } 1354 } 1355 return null; 1356 } 1357 1358 @Override 1359 public NetworkCapabilities getNetworkCapabilities(Network network) { 1360 enforceAccessPermission(); 1361 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1362 } 1363 1364 @Override 1365 public NetworkState[] getAllNetworkState() { 1366 // Require internal since we're handing out IMSI details 1367 enforceConnectivityInternalPermission(); 1368 1369 final ArrayList<NetworkState> result = Lists.newArrayList(); 1370 for (Network network : getAllNetworks()) { 1371 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1372 if (nai != null) { 1373 result.add(nai.getNetworkState()); 1374 } 1375 } 1376 return result.toArray(new NetworkState[result.size()]); 1377 } 1378 1379 @Override 1380 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1381 enforceAccessPermission(); 1382 final int uid = Binder.getCallingUid(); 1383 final long token = Binder.clearCallingIdentity(); 1384 try { 1385 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1386 if (state.networkInfo != null) { 1387 try { 1388 return mPolicyManager.getNetworkQuotaInfo(state); 1389 } catch (RemoteException e) { 1390 } 1391 } 1392 return null; 1393 } finally { 1394 Binder.restoreCallingIdentity(token); 1395 } 1396 } 1397 1398 @Override 1399 public boolean isActiveNetworkMetered() { 1400 enforceAccessPermission(); 1401 1402 final NetworkInfo info = getActiveNetworkInfo(); 1403 return (info != null) ? info.isMetered() : false; 1404 } 1405 1406 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1407 @Override 1408 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1409 int deviceType = Integer.parseInt(label); 1410 sendDataActivityBroadcast(deviceType, active, tsNanos); 1411 } 1412 }; 1413 1414 /** 1415 * Ensure that a network route exists to deliver traffic to the specified 1416 * host via the specified network interface. 1417 * @param networkType the type of the network over which traffic to the 1418 * specified host is to be routed 1419 * @param hostAddress the IP address of the host to which the route is 1420 * desired 1421 * @return {@code true} on success, {@code false} on failure 1422 */ 1423 @Override 1424 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1425 enforceChangePermission(); 1426 if (mProtectedNetworks.contains(networkType)) { 1427 enforceConnectivityInternalPermission(); 1428 } 1429 1430 InetAddress addr; 1431 try { 1432 addr = InetAddress.getByAddress(hostAddress); 1433 } catch (UnknownHostException e) { 1434 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1435 return false; 1436 } 1437 1438 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1439 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1440 return false; 1441 } 1442 1443 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1444 if (nai == null) { 1445 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1446 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1447 } else { 1448 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1449 } 1450 return false; 1451 } 1452 1453 DetailedState netState; 1454 synchronized (nai) { 1455 netState = nai.networkInfo.getDetailedState(); 1456 } 1457 1458 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1459 if (VDBG) { 1460 log("requestRouteToHostAddress on down network " 1461 + "(" + networkType + ") - dropped" 1462 + " netState=" + netState); 1463 } 1464 return false; 1465 } 1466 1467 final int uid = Binder.getCallingUid(); 1468 final long token = Binder.clearCallingIdentity(); 1469 try { 1470 LinkProperties lp; 1471 int netId; 1472 synchronized (nai) { 1473 lp = nai.linkProperties; 1474 netId = nai.network.netId; 1475 } 1476 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1477 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1478 return ok; 1479 } finally { 1480 Binder.restoreCallingIdentity(token); 1481 } 1482 } 1483 1484 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1485 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1486 if (bestRoute == null) { 1487 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1488 } else { 1489 String iface = bestRoute.getInterface(); 1490 if (bestRoute.getGateway().equals(addr)) { 1491 // if there is no better route, add the implied hostroute for our gateway 1492 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1493 } else { 1494 // if we will connect to this through another route, add a direct route 1495 // to it's gateway 1496 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1497 } 1498 } 1499 if (DBG) log("Adding legacy route " + bestRoute + 1500 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1501 try { 1502 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1503 } catch (Exception e) { 1504 // never crash - catch them all 1505 if (DBG) loge("Exception trying to add a route: " + e); 1506 return false; 1507 } 1508 return true; 1509 } 1510 1511 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1512 @Override 1513 public void onUidRulesChanged(int uid, int uidRules) { 1514 // caller is NPMS, since we only register with them 1515 if (LOGD_RULES) { 1516 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1517 } 1518 1519 synchronized (mRulesLock) { 1520 // skip update when we've already applied rules 1521 final int oldRules = mUidRules.get(uid, RULE_NONE); 1522 if (oldRules == uidRules) return; 1523 1524 if (uidRules == RULE_NONE) { 1525 mUidRules.delete(uid); 1526 } else { 1527 mUidRules.put(uid, uidRules); 1528 } 1529 } 1530 1531 // TODO: notify UID when it has requested targeted updates 1532 } 1533 1534 @Override 1535 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1536 // caller is NPMS, since we only register with them 1537 if (LOGD_RULES) { 1538 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1539 } 1540 1541 synchronized (mRulesLock) { 1542 mMeteredIfaces.clear(); 1543 for (String iface : meteredIfaces) { 1544 mMeteredIfaces.add(iface); 1545 } 1546 } 1547 } 1548 1549 @Override 1550 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1551 // caller is NPMS, since we only register with them 1552 if (LOGD_RULES) { 1553 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1554 } 1555 1556 synchronized (mRulesLock) { 1557 mRestrictBackground = restrictBackground; 1558 } 1559 1560 if (restrictBackground) { 1561 log("onRestrictBackgroundChanged(true): disabling tethering"); 1562 mTethering.untetherAll(); 1563 } 1564 } 1565 1566 @Override 1567 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1568 if (LOGD_RULES) { 1569 // caller is NPMS, since we only register with them 1570 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1571 + whitelisted + ")"); 1572 } 1573 } 1574 @Override 1575 public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { 1576 if (LOGD_RULES) { 1577 // caller is NPMS, since we only register with them 1578 log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" 1579 + blacklisted + ")"); 1580 } 1581 } 1582 }; 1583 1584 /** 1585 * Require that the caller is either in the same user or has appropriate permission to interact 1586 * across users. 1587 * 1588 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1589 */ 1590 private void enforceCrossUserPermission(int userId) { 1591 if (userId == UserHandle.getCallingUserId()) { 1592 // Not a cross-user call. 1593 return; 1594 } 1595 mContext.enforceCallingOrSelfPermission( 1596 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1597 "ConnectivityService"); 1598 } 1599 1600 private void enforceInternetPermission() { 1601 mContext.enforceCallingOrSelfPermission( 1602 android.Manifest.permission.INTERNET, 1603 "ConnectivityService"); 1604 } 1605 1606 private void enforceAccessPermission() { 1607 mContext.enforceCallingOrSelfPermission( 1608 android.Manifest.permission.ACCESS_NETWORK_STATE, 1609 "ConnectivityService"); 1610 } 1611 1612 private void enforceChangePermission() { 1613 ConnectivityManager.enforceChangePermission(mContext); 1614 } 1615 1616 private void enforceTetherAccessPermission() { 1617 mContext.enforceCallingOrSelfPermission( 1618 android.Manifest.permission.ACCESS_NETWORK_STATE, 1619 "ConnectivityService"); 1620 } 1621 1622 private void enforceConnectivityInternalPermission() { 1623 mContext.enforceCallingOrSelfPermission( 1624 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1625 "ConnectivityService"); 1626 } 1627 1628 private void enforceConnectivityRestrictedNetworksPermission() { 1629 try { 1630 mContext.enforceCallingOrSelfPermission( 1631 android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, 1632 "ConnectivityService"); 1633 return; 1634 } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } 1635 enforceConnectivityInternalPermission(); 1636 } 1637 1638 private void enforceKeepalivePermission() { 1639 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1640 } 1641 1642 // Public because it's used by mLockdownTracker. 1643 public void sendConnectedBroadcast(NetworkInfo info) { 1644 enforceConnectivityInternalPermission(); 1645 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1646 } 1647 1648 private void sendInetConditionBroadcast(NetworkInfo info) { 1649 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1650 } 1651 1652 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1653 if (mLockdownTracker != null) { 1654 info = new NetworkInfo(info); 1655 mLockdownTracker.augmentNetworkInfo(info); 1656 } 1657 1658 Intent intent = new Intent(bcastType); 1659 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1660 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1661 if (info.isFailover()) { 1662 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1663 info.setFailover(false); 1664 } 1665 if (info.getReason() != null) { 1666 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1667 } 1668 if (info.getExtraInfo() != null) { 1669 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1670 info.getExtraInfo()); 1671 } 1672 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1673 return intent; 1674 } 1675 1676 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1677 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1678 } 1679 1680 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1681 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1682 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1683 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1684 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1685 final long ident = Binder.clearCallingIdentity(); 1686 try { 1687 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1688 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1689 } finally { 1690 Binder.restoreCallingIdentity(ident); 1691 } 1692 } 1693 1694 private void sendStickyBroadcast(Intent intent) { 1695 synchronized(this) { 1696 if (!mSystemReady) { 1697 mInitialBroadcast = new Intent(intent); 1698 } 1699 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1700 if (VDBG) { 1701 log("sendStickyBroadcast: action=" + intent.getAction()); 1702 } 1703 1704 Bundle options = null; 1705 final long ident = Binder.clearCallingIdentity(); 1706 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1707 final NetworkInfo ni = intent.getParcelableExtra( 1708 ConnectivityManager.EXTRA_NETWORK_INFO); 1709 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1710 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1711 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1712 } else { 1713 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1714 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1715 options = opts.toBundle(); 1716 } 1717 final IBatteryStats bs = BatteryStatsService.getService(); 1718 try { 1719 bs.noteConnectivityChanged(intent.getIntExtra( 1720 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1721 ni != null ? ni.getState().toString() : "?"); 1722 } catch (RemoteException e) { 1723 } 1724 } 1725 try { 1726 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1727 } finally { 1728 Binder.restoreCallingIdentity(ident); 1729 } 1730 } 1731 } 1732 1733 void systemReady() { 1734 loadGlobalProxy(); 1735 1736 synchronized(this) { 1737 mSystemReady = true; 1738 if (mInitialBroadcast != null) { 1739 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1740 mInitialBroadcast = null; 1741 } 1742 } 1743 // load the global proxy at startup 1744 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1745 1746 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1747 // for user to unlock device too. 1748 updateLockdownVpn(); 1749 1750 // Configure whether mobile data is always on. 1751 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1752 1753 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1754 1755 mPermissionMonitor.startMonitoring(); 1756 } 1757 1758 /** 1759 * Setup data activity tracking for the given network. 1760 * 1761 * Every {@code setupDataActivityTracking} should be paired with a 1762 * {@link #removeDataActivityTracking} for cleanup. 1763 */ 1764 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1765 final String iface = networkAgent.linkProperties.getInterfaceName(); 1766 1767 final int timeout; 1768 int type = ConnectivityManager.TYPE_NONE; 1769 1770 if (networkAgent.networkCapabilities.hasTransport( 1771 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1772 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1773 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1774 10); 1775 type = ConnectivityManager.TYPE_MOBILE; 1776 } else if (networkAgent.networkCapabilities.hasTransport( 1777 NetworkCapabilities.TRANSPORT_WIFI)) { 1778 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1779 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1780 15); 1781 type = ConnectivityManager.TYPE_WIFI; 1782 } else { 1783 // do not track any other networks 1784 timeout = 0; 1785 } 1786 1787 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1788 try { 1789 mNetd.addIdleTimer(iface, timeout, type); 1790 } catch (Exception e) { 1791 // You shall not crash! 1792 loge("Exception in setupDataActivityTracking " + e); 1793 } 1794 } 1795 } 1796 1797 /** 1798 * Remove data activity tracking when network disconnects. 1799 */ 1800 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1801 final String iface = networkAgent.linkProperties.getInterfaceName(); 1802 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1803 1804 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1805 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1806 try { 1807 // the call fails silently if no idletimer setup for this interface 1808 mNetd.removeIdleTimer(iface); 1809 } catch (Exception e) { 1810 loge("Exception in removeDataActivityTracking " + e); 1811 } 1812 } 1813 } 1814 1815 /** 1816 * Reads the network specific MTU size from reources. 1817 * and set it on it's iface. 1818 */ 1819 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1820 final String iface = newLp.getInterfaceName(); 1821 final int mtu = newLp.getMtu(); 1822 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1823 if (VDBG) log("identical MTU - not setting"); 1824 return; 1825 } 1826 1827 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1828 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1829 return; 1830 } 1831 1832 // Cannot set MTU without interface name 1833 if (TextUtils.isEmpty(iface)) { 1834 loge("Setting MTU size with null iface."); 1835 return; 1836 } 1837 1838 try { 1839 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1840 mNetd.setMtu(iface, mtu); 1841 } catch (Exception e) { 1842 Slog.e(TAG, "exception in setMtu()" + e); 1843 } 1844 } 1845 1846 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1847 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1848 1849 // Overridden for testing purposes to avoid writing to SystemProperties. 1850 @VisibleForTesting 1851 protected int getDefaultTcpRwnd() { 1852 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1853 } 1854 1855 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1856 if (isDefaultNetwork(nai) == false) { 1857 return; 1858 } 1859 1860 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1861 String[] values = null; 1862 if (tcpBufferSizes != null) { 1863 values = tcpBufferSizes.split(","); 1864 } 1865 1866 if (values == null || values.length != 6) { 1867 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1868 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1869 values = tcpBufferSizes.split(","); 1870 } 1871 1872 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1873 1874 try { 1875 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1876 1877 final String prefix = "/sys/kernel/ipv4/tcp_"; 1878 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1879 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1880 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1881 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1882 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1883 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1884 mCurrentTcpBufferSizes = tcpBufferSizes; 1885 } catch (IOException e) { 1886 loge("Can't set TCP buffer sizes:" + e); 1887 } 1888 1889 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1890 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1891 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1892 if (rwndValue != 0) { 1893 SystemProperties.set(sysctlKey, rwndValue.toString()); 1894 } 1895 } 1896 1897 private void flushVmDnsCache() { 1898 /* 1899 * Tell the VMs to toss their DNS caches 1900 */ 1901 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1902 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1903 /* 1904 * Connectivity events can happen before boot has completed ... 1905 */ 1906 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1907 final long ident = Binder.clearCallingIdentity(); 1908 try { 1909 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1910 } finally { 1911 Binder.restoreCallingIdentity(ident); 1912 } 1913 } 1914 1915 @Override 1916 public int getRestoreDefaultNetworkDelay(int networkType) { 1917 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1918 NETWORK_RESTORE_DELAY_PROP_NAME); 1919 if(restoreDefaultNetworkDelayStr != null && 1920 restoreDefaultNetworkDelayStr.length() != 0) { 1921 try { 1922 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1923 } catch (NumberFormatException e) { 1924 } 1925 } 1926 // if the system property isn't set, use the value for the apn type 1927 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1928 1929 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1930 (mNetConfigs[networkType] != null)) { 1931 ret = mNetConfigs[networkType].restoreTime; 1932 } 1933 return ret; 1934 } 1935 1936 private boolean argsContain(String[] args, String target) { 1937 for (String arg : args) { 1938 if (arg.equals(target)) return true; 1939 } 1940 return false; 1941 } 1942 1943 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1944 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1945 final long DIAG_TIME_MS = 5000; 1946 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1947 // Start gathering diagnostic information. 1948 netDiags.add(new NetworkDiagnostics( 1949 nai.network, 1950 new LinkProperties(nai.linkProperties), // Must be a copy. 1951 DIAG_TIME_MS)); 1952 } 1953 1954 for (NetworkDiagnostics netDiag : netDiags) { 1955 pw.println(); 1956 netDiag.waitForMeasurements(); 1957 netDiag.dump(pw); 1958 } 1959 } 1960 1961 @Override 1962 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1963 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1964 if (mContext.checkCallingOrSelfPermission( 1965 android.Manifest.permission.DUMP) 1966 != PackageManager.PERMISSION_GRANTED) { 1967 pw.println("Permission Denial: can't dump ConnectivityService " + 1968 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1969 Binder.getCallingUid()); 1970 return; 1971 } 1972 1973 if (argsContain(args, "--diag")) { 1974 dumpNetworkDiagnostics(pw); 1975 return; 1976 } 1977 1978 pw.print("NetworkFactories for:"); 1979 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1980 pw.print(" " + nfi.name); 1981 } 1982 pw.println(); 1983 pw.println(); 1984 1985 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1986 pw.print("Active default network: "); 1987 if (defaultNai == null) { 1988 pw.println("none"); 1989 } else { 1990 pw.println(defaultNai.network.netId); 1991 } 1992 pw.println(); 1993 1994 pw.println("Current Networks:"); 1995 pw.increaseIndent(); 1996 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1997 pw.println(nai.toString()); 1998 pw.increaseIndent(); 1999 pw.println(String.format( 2000 "Requests: REQUEST:%d LISTEN:%d BACKGROUND_REQUEST:%d total:%d", 2001 nai.numForegroundNetworkRequests(), 2002 nai.numNetworkRequests() - nai.numRequestNetworkRequests(), 2003 nai.numBackgroundNetworkRequests(), 2004 nai.numNetworkRequests())); 2005 pw.increaseIndent(); 2006 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2007 pw.println(nai.requestAt(i).toString()); 2008 } 2009 pw.decreaseIndent(); 2010 pw.println("Lingered:"); 2011 pw.increaseIndent(); 2012 nai.dumpLingerTimers(pw); 2013 pw.decreaseIndent(); 2014 pw.decreaseIndent(); 2015 } 2016 pw.decreaseIndent(); 2017 pw.println(); 2018 2019 pw.println("Metered Interfaces:"); 2020 pw.increaseIndent(); 2021 for (String value : mMeteredIfaces) { 2022 pw.println(value); 2023 } 2024 pw.decreaseIndent(); 2025 pw.println(); 2026 2027 pw.print("Restrict background: "); 2028 pw.println(mRestrictBackground); 2029 pw.println(); 2030 2031 pw.println("Status for known UIDs:"); 2032 pw.increaseIndent(); 2033 final int size = mUidRules.size(); 2034 for (int i = 0; i < size; i++) { 2035 final int uid = mUidRules.keyAt(i); 2036 pw.print("UID="); 2037 pw.print(uid); 2038 final int uidRules = mUidRules.get(uid, RULE_NONE); 2039 pw.print(" rules="); 2040 pw.print(uidRulesToString(uidRules)); 2041 pw.println(); 2042 } 2043 pw.println(); 2044 pw.decreaseIndent(); 2045 2046 pw.println("Network Requests:"); 2047 pw.increaseIndent(); 2048 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2049 pw.println(nri.toString()); 2050 } 2051 pw.println(); 2052 pw.decreaseIndent(); 2053 2054 mLegacyTypeTracker.dump(pw); 2055 2056 synchronized (this) { 2057 pw.print("mNetTransitionWakeLock: currently " + 2058 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 2059 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 2060 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 2061 } else { 2062 pw.println(", last requested never"); 2063 } 2064 } 2065 2066 pw.println(); 2067 mTethering.dump(fd, pw, args); 2068 2069 pw.println(); 2070 mKeepaliveTracker.dump(pw); 2071 2072 pw.println(); 2073 2074 if (mInetLog != null && mInetLog.size() > 0) { 2075 pw.println(); 2076 pw.println("Inet condition reports:"); 2077 pw.increaseIndent(); 2078 for(int i = 0; i < mInetLog.size(); i++) { 2079 pw.println(mInetLog.get(i)); 2080 } 2081 pw.decreaseIndent(); 2082 } 2083 2084 if (argsContain(args, "--short") == false) { 2085 pw.println(); 2086 synchronized (mValidationLogs) { 2087 pw.println("mValidationLogs (most recent first):"); 2088 for (ValidationLog p : mValidationLogs) { 2089 pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); 2090 pw.increaseIndent(); 2091 p.mLog.dump(fd, pw, args); 2092 pw.decreaseIndent(); 2093 } 2094 } 2095 2096 pw.println(); 2097 pw.println("mNetworkRequestInfoLogs (most recent first):"); 2098 pw.increaseIndent(); 2099 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 2100 pw.decreaseIndent(); 2101 2102 pw.println(); 2103 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 2104 pw.increaseIndent(); 2105 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 2106 pw.decreaseIndent(); 2107 } 2108 } 2109 2110 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 2111 if (nai.network == null) return false; 2112 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 2113 if (officialNai != null && officialNai.equals(nai)) return true; 2114 if (officialNai != null || VDBG) { 2115 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 2116 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 2117 " - " + nai); 2118 } 2119 return false; 2120 } 2121 2122 // must be stateless - things change under us. 2123 private class NetworkStateTrackerHandler extends Handler { 2124 public NetworkStateTrackerHandler(Looper looper) { 2125 super(looper); 2126 } 2127 2128 private boolean maybeHandleAsyncChannelMessage(Message msg) { 2129 switch (msg.what) { 2130 default: 2131 return false; 2132 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2133 handleAsyncChannelHalfConnect(msg); 2134 break; 2135 } 2136 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2137 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2138 if (nai != null) nai.asyncChannel.disconnect(); 2139 break; 2140 } 2141 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2142 handleAsyncChannelDisconnected(msg); 2143 break; 2144 } 2145 } 2146 return true; 2147 } 2148 2149 private void maybeHandleNetworkAgentMessage(Message msg) { 2150 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2151 if (nai == null) { 2152 if (VDBG) { 2153 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 2154 log(String.format("%s from unknown NetworkAgent", what)); 2155 } 2156 return; 2157 } 2158 2159 switch (msg.what) { 2160 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2161 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2162 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2163 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED) || 2164 networkCapabilities.hasCapability(NET_CAPABILITY_FOREGROUND)) { 2165 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2166 } 2167 updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities); 2168 break; 2169 } 2170 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2171 if (VDBG) { 2172 log("Update of LinkProperties for " + nai.name() + 2173 "; created=" + nai.created + 2174 "; everConnected=" + nai.everConnected); 2175 } 2176 LinkProperties oldLp = nai.linkProperties; 2177 synchronized (nai) { 2178 nai.linkProperties = (LinkProperties)msg.obj; 2179 } 2180 if (nai.everConnected) updateLinkProperties(nai, oldLp); 2181 break; 2182 } 2183 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2184 NetworkInfo info = (NetworkInfo) msg.obj; 2185 updateNetworkInfo(nai, info); 2186 break; 2187 } 2188 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2189 Integer score = (Integer) msg.obj; 2190 if (score != null) updateNetworkScore(nai, score.intValue()); 2191 break; 2192 } 2193 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2194 try { 2195 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2196 } catch (Exception e) { 2197 // Never crash! 2198 loge("Exception in addVpnUidRanges: " + e); 2199 } 2200 break; 2201 } 2202 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2203 try { 2204 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2205 } catch (Exception e) { 2206 // Never crash! 2207 loge("Exception in removeVpnUidRanges: " + e); 2208 } 2209 break; 2210 } 2211 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2212 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2213 loge("ERROR: already-connected network explicitly selected."); 2214 } 2215 nai.networkMisc.explicitlySelected = true; 2216 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2217 break; 2218 } 2219 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2220 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2221 break; 2222 } 2223 } 2224 } 2225 2226 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2227 switch (msg.what) { 2228 default: 2229 return false; 2230 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2231 final NetworkAgentInfo nai; 2232 synchronized (mNetworkForNetId) { 2233 nai = mNetworkForNetId.get(msg.arg2); 2234 } 2235 if (nai != null) { 2236 final boolean valid = 2237 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2238 final boolean wasValidated = nai.lastValidated; 2239 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2240 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2241 if (valid != nai.lastValidated) { 2242 final int oldScore = nai.getCurrentScore(); 2243 nai.lastValidated = valid; 2244 nai.everValidated |= valid; 2245 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2246 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2247 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2248 } 2249 updateInetCondition(nai); 2250 // Let the NetworkAgent know the state of its network 2251 Bundle redirectUrlBundle = new Bundle(); 2252 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2253 nai.asyncChannel.sendMessage( 2254 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2255 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2256 0, redirectUrlBundle); 2257 if (wasValidated && !nai.lastValidated) { 2258 handleNetworkUnvalidated(nai); 2259 } 2260 } 2261 break; 2262 } 2263 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2264 final int netId = msg.arg2; 2265 final boolean visible = (msg.arg1 != 0); 2266 final NetworkAgentInfo nai; 2267 synchronized (mNetworkForNetId) { 2268 nai = mNetworkForNetId.get(netId); 2269 } 2270 // If captive portal status has changed, update capabilities. 2271 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2272 final int oldScore = nai.getCurrentScore(); 2273 nai.lastCaptivePortalDetected = visible; 2274 nai.everCaptivePortalDetected |= visible; 2275 updateCapabilities(oldScore, nai, nai.networkCapabilities); 2276 } 2277 if (!visible) { 2278 mNotifier.clearNotification(netId); 2279 } else { 2280 if (nai == null) { 2281 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2282 break; 2283 } 2284 if (!nai.networkMisc.provisioningNotificationDisabled) { 2285 mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null, 2286 (PendingIntent) msg.obj, nai.networkMisc.explicitlySelected); 2287 } 2288 } 2289 break; 2290 } 2291 } 2292 return true; 2293 } 2294 2295 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2296 switch (msg.what) { 2297 default: 2298 return false; 2299 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2300 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2301 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2302 handleLingerComplete(nai); 2303 } 2304 break; 2305 } 2306 } 2307 return true; 2308 } 2309 2310 @Override 2311 public void handleMessage(Message msg) { 2312 if (!maybeHandleAsyncChannelMessage(msg) && 2313 !maybeHandleNetworkMonitorMessage(msg) && 2314 !maybeHandleNetworkAgentInfoMessage(msg)) { 2315 maybeHandleNetworkAgentMessage(msg); 2316 } 2317 } 2318 } 2319 2320 private void updateLingerState(NetworkAgentInfo nai, long now) { 2321 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2322 // 2. If the network was lingering and there are now requests, unlinger it. 2323 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2324 // one lingered request, start lingering. 2325 nai.updateLingerTimer(); 2326 if (nai.isLingering() && nai.numForegroundNetworkRequests() > 0) { 2327 if (DBG) log("Unlingering " + nai.name()); 2328 nai.unlinger(); 2329 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2330 } else if (unneeded(nai, UnneededFor.LINGER) && nai.getLingerExpiry() > 0) { 2331 int lingerTime = (int) (nai.getLingerExpiry() - now); 2332 if (DBG) log("Lingering " + nai.name() + " for " + lingerTime + "ms"); 2333 nai.linger(); 2334 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2335 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2336 } 2337 } 2338 2339 private void handleAsyncChannelHalfConnect(Message msg) { 2340 AsyncChannel ac = (AsyncChannel) msg.obj; 2341 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2342 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2343 if (VDBG) log("NetworkFactory connected"); 2344 // A network factory has connected. Send it all current NetworkRequests. 2345 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2346 if (nri.request.isListen()) continue; 2347 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2348 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2349 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2350 } 2351 } else { 2352 loge("Error connecting NetworkFactory"); 2353 mNetworkFactoryInfos.remove(msg.obj); 2354 } 2355 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2356 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2357 if (VDBG) log("NetworkAgent connected"); 2358 // A network agent has requested a connection. Establish the connection. 2359 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2360 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2361 } else { 2362 loge("Error connecting NetworkAgent"); 2363 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2364 if (nai != null) { 2365 final boolean wasDefault = isDefaultNetwork(nai); 2366 synchronized (mNetworkForNetId) { 2367 mNetworkForNetId.remove(nai.network.netId); 2368 mNetIdInUse.delete(nai.network.netId); 2369 } 2370 // Just in case. 2371 mLegacyTypeTracker.remove(nai, wasDefault); 2372 } 2373 } 2374 } 2375 } 2376 2377 private void handleAsyncChannelDisconnected(Message msg) { 2378 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2379 if (nai != null) { 2380 if (DBG) { 2381 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2382 } 2383 // A network agent has disconnected. 2384 // TODO - if we move the logic to the network agent (have them disconnect 2385 // because they lost all their requests or because their score isn't good) 2386 // then they would disconnect organically, report their new state and then 2387 // disconnect the channel. 2388 if (nai.networkInfo.isConnected()) { 2389 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2390 null, null); 2391 } 2392 final boolean wasDefault = isDefaultNetwork(nai); 2393 if (wasDefault) { 2394 mDefaultInetConditionPublished = 0; 2395 // Log default network disconnection before required book-keeping. 2396 // Let rematchAllNetworksAndRequests() below record a new default network event 2397 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2398 // whose timestamps tell how long it takes to recover a default network. 2399 logDefaultNetworkEvent(null, nai); 2400 } 2401 notifyIfacesChangedForNetworkStats(); 2402 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2403 // by other networks that are already connected. Perhaps that can be done by 2404 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2405 // of rematchAllNetworksAndRequests 2406 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2407 mKeepaliveTracker.handleStopAllKeepalives(nai, 2408 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2409 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2410 mNetworkAgentInfos.remove(msg.replyTo); 2411 updateClat(null, nai.linkProperties, nai); 2412 synchronized (mNetworkForNetId) { 2413 // Remove the NetworkAgent, but don't mark the netId as 2414 // available until we've told netd to delete it below. 2415 mNetworkForNetId.remove(nai.network.netId); 2416 } 2417 // Remove all previously satisfied requests. 2418 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2419 NetworkRequest request = nai.requestAt(i); 2420 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2421 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2422 mNetworkForRequestId.remove(request.requestId); 2423 sendUpdatedScoreToFactories(request, 0); 2424 } 2425 } 2426 nai.clearLingerState(); 2427 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2428 removeDataActivityTracking(nai); 2429 notifyLockdownVpn(nai); 2430 requestNetworkTransitionWakelock(nai.name()); 2431 } 2432 mLegacyTypeTracker.remove(nai, wasDefault); 2433 rematchAllNetworksAndRequests(null, 0); 2434 mLingerMonitor.noteDisconnect(nai); 2435 if (nai.created) { 2436 // Tell netd to clean up the configuration for this network 2437 // (routing rules, DNS, etc). 2438 // This may be slow as it requires a lot of netd shelling out to ip and 2439 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2440 // after we've rematched networks with requests which should make a potential 2441 // fallback network the default or requested a new network from the 2442 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2443 // long time. 2444 try { 2445 mNetd.removeNetwork(nai.network.netId); 2446 } catch (Exception e) { 2447 loge("Exception removing network: " + e); 2448 } 2449 } 2450 synchronized (mNetworkForNetId) { 2451 mNetIdInUse.delete(nai.network.netId); 2452 } 2453 } else { 2454 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2455 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2456 } 2457 } 2458 2459 // If this method proves to be too slow then we can maintain a separate 2460 // pendingIntent => NetworkRequestInfo map. 2461 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2462 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2463 Intent intent = pendingIntent.getIntent(); 2464 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2465 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2466 if (existingPendingIntent != null && 2467 existingPendingIntent.getIntent().filterEquals(intent)) { 2468 return entry.getValue(); 2469 } 2470 } 2471 return null; 2472 } 2473 2474 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2475 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2476 2477 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2478 if (existingRequest != null) { // remove the existing request. 2479 if (DBG) log("Replacing " + existingRequest.request + " with " 2480 + nri.request + " because their intents matched."); 2481 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2482 } 2483 handleRegisterNetworkRequest(nri); 2484 } 2485 2486 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2487 mNetworkRequests.put(nri.request, nri); 2488 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2489 if (nri.request.isListen()) { 2490 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2491 if (nri.request.networkCapabilities.hasSignalStrength() && 2492 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2493 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2494 } 2495 } 2496 } 2497 rematchAllNetworksAndRequests(null, 0); 2498 if (nri.request.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2499 sendUpdatedScoreToFactories(nri.request, 0); 2500 } 2501 } 2502 2503 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2504 int callingUid) { 2505 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2506 if (nri != null) { 2507 handleReleaseNetworkRequest(nri.request, callingUid); 2508 } 2509 } 2510 2511 // Determines whether the network is the best (or could become the best, if it validated), for 2512 // none of a particular type of NetworkRequests. The type of NetworkRequests considered depends 2513 // on the value of reason: 2514 // 2515 // - UnneededFor.TEARDOWN: non-listen NetworkRequests. If a network is unneeded for this reason, 2516 // then it should be torn down. 2517 // - UnneededFor.LINGER: foreground NetworkRequests. If a network is unneeded for this reason, 2518 // then it should be lingered. 2519 private boolean unneeded(NetworkAgentInfo nai, UnneededFor reason) { 2520 final int numRequests; 2521 switch (reason) { 2522 case TEARDOWN: 2523 numRequests = nai.numRequestNetworkRequests(); 2524 break; 2525 case LINGER: 2526 numRequests = nai.numForegroundNetworkRequests(); 2527 break; 2528 default: 2529 Slog.wtf(TAG, "Invalid reason. Cannot happen."); 2530 return true; 2531 } 2532 2533 if (!nai.everConnected || nai.isVPN() || nai.isLingering() || numRequests > 0) { 2534 return false; 2535 } 2536 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2537 if (reason == UnneededFor.LINGER && nri.request.isBackgroundRequest()) { 2538 // Background requests don't affect lingering. 2539 continue; 2540 } 2541 2542 // If this Network is already the highest scoring Network for a request, or if 2543 // there is hope for it to become one if it validated, then it is needed. 2544 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2545 (nai.isSatisfyingRequest(nri.request.requestId) || 2546 // Note that this catches two important cases: 2547 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2548 // is currently satisfying the request. This is desirable when 2549 // cellular ends up validating but WiFi does not. 2550 // 2. Unvalidated WiFi will not be reaped when validated cellular 2551 // is currently satisfying the request. This is desirable when 2552 // WiFi ends up validating and out scoring cellular. 2553 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2554 nai.getCurrentScoreAsValidated())) { 2555 return false; 2556 } 2557 } 2558 return true; 2559 } 2560 2561 private NetworkRequestInfo getNriForAppRequest( 2562 NetworkRequest request, int callingUid, String requestedOperation) { 2563 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2564 2565 if (nri != null) { 2566 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2567 log(String.format("UID %d attempted to %s for unowned request %s", 2568 callingUid, requestedOperation, nri)); 2569 return null; 2570 } 2571 } 2572 2573 return nri; 2574 } 2575 2576 private void handleRequestCallbackUpdate(NetworkRequest request, int callingUid, 2577 String description, int callbackType) { 2578 final NetworkRequestInfo nri = getNriForAppRequest(request, callingUid, description); 2579 if (nri == null) return; 2580 2581 final NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2582 // The network that is satisfying this request may have changed since 2583 // the application requested the update. 2584 // 2585 // - If the request is no longer satisfied, don't send any updates. 2586 // - If the request is satisfied by a different network, it is the 2587 // caller's responsibility to check that the Network object in the 2588 // callback matches the network that was returned in the last 2589 // onAvailable() callback for this request. 2590 if (nai == null) return; 2591 callCallbackForRequest(nri, nai, callbackType, 0); 2592 } 2593 2594 private void handleRequestLinkProperties(NetworkRequest request, int callingUid) { 2595 handleRequestCallbackUpdate(request, callingUid, 2596 "request LinkProperties", ConnectivityManager.CALLBACK_IP_CHANGED); 2597 } 2598 2599 private void handleRequestNetworkCapabilities(NetworkRequest request, int callingUid) { 2600 handleRequestCallbackUpdate(request, callingUid, 2601 "request NetworkCapabilities", ConnectivityManager.CALLBACK_CAP_CHANGED); 2602 } 2603 2604 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2605 final NetworkRequestInfo nri = getNriForAppRequest( 2606 request, callingUid, "release NetworkRequest"); 2607 if (nri == null) return; 2608 2609 if (VDBG || (DBG && nri.request.isRequest())) log("releasing " + request); 2610 nri.unlinkDeathRecipient(); 2611 mNetworkRequests.remove(request); 2612 synchronized (mUidToNetworkRequestCount) { 2613 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2614 if (requests < 1) { 2615 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2616 nri.mUid); 2617 } else if (requests == 1) { 2618 mUidToNetworkRequestCount.removeAt( 2619 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2620 } else { 2621 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2622 } 2623 } 2624 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2625 if (nri.request.isRequest()) { 2626 boolean wasKept = false; 2627 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2628 if (nai != null) { 2629 boolean wasBackgroundNetwork = nai.isBackgroundNetwork(); 2630 nai.removeRequest(nri.request.requestId); 2631 if (VDBG) { 2632 log(" Removing from current network " + nai.name() + 2633 ", leaving " + nai.numNetworkRequests() + " requests."); 2634 } 2635 // If there are still lingered requests on this network, don't tear it down, 2636 // but resume lingering instead. 2637 updateLingerState(nai, SystemClock.elapsedRealtime()); 2638 if (unneeded(nai, UnneededFor.TEARDOWN)) { 2639 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2640 teardownUnneededNetwork(nai); 2641 } else { 2642 wasKept = true; 2643 } 2644 mNetworkForRequestId.remove(nri.request.requestId); 2645 if (!wasBackgroundNetwork && nai.isBackgroundNetwork()) { 2646 // Went from foreground to background. 2647 updateCapabilities(nai.getCurrentScore(), nai, nai.networkCapabilities); 2648 } 2649 } 2650 2651 // TODO: remove this code once we know that the Slog.wtf is never hit. 2652 // 2653 // Find all networks that are satisfying this request and remove the request 2654 // from their request lists. 2655 // TODO - it's my understanding that for a request there is only a single 2656 // network satisfying it, so this loop is wasteful 2657 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2658 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2659 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2660 otherNai.name() + ", but mNetworkAgentInfos says " + 2661 (nai != null ? nai.name() : "null")); 2662 } 2663 } 2664 2665 // Maintain the illusion. When this request arrived, we might have pretended 2666 // that a network connected to serve it, even though the network was already 2667 // connected. Now that this request has gone away, we might have to pretend 2668 // that the network disconnected. LegacyTypeTracker will generate that 2669 // phantom disconnect for this type. 2670 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2671 boolean doRemove = true; 2672 if (wasKept) { 2673 // check if any of the remaining requests for this network are for the 2674 // same legacy type - if so, don't remove the nai 2675 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2676 NetworkRequest otherRequest = nai.requestAt(i); 2677 if (otherRequest.legacyType == nri.request.legacyType && 2678 otherRequest.isRequest()) { 2679 if (DBG) log(" still have other legacy request - leaving"); 2680 doRemove = false; 2681 } 2682 } 2683 } 2684 2685 if (doRemove) { 2686 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2687 } 2688 } 2689 2690 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2691 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2692 nri.request); 2693 } 2694 } else { 2695 // listens don't have a singular affectedNetwork. Check all networks to see 2696 // if this listen request applies and remove it. 2697 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2698 nai.removeRequest(nri.request.requestId); 2699 if (nri.request.networkCapabilities.hasSignalStrength() && 2700 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2701 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2702 } 2703 } 2704 } 2705 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED, 0); 2706 } 2707 2708 @Override 2709 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2710 enforceConnectivityInternalPermission(); 2711 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2712 accept ? 1 : 0, always ? 1: 0, network)); 2713 } 2714 2715 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2716 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2717 " accept=" + accept + " always=" + always); 2718 2719 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2720 if (nai == null) { 2721 // Nothing to do. 2722 return; 2723 } 2724 2725 if (nai.everValidated) { 2726 // The network validated while the dialog box was up. Take no action. 2727 return; 2728 } 2729 2730 if (!nai.networkMisc.explicitlySelected) { 2731 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2732 } 2733 2734 if (accept != nai.networkMisc.acceptUnvalidated) { 2735 int oldScore = nai.getCurrentScore(); 2736 nai.networkMisc.acceptUnvalidated = accept; 2737 rematchAllNetworksAndRequests(nai, oldScore); 2738 sendUpdatedScoreToFactories(nai); 2739 } 2740 2741 if (always) { 2742 nai.asyncChannel.sendMessage( 2743 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2744 } 2745 2746 if (!accept) { 2747 // Tell the NetworkAgent to not automatically reconnect to the network. 2748 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2749 // Teardown the nework. 2750 teardownUnneededNetwork(nai); 2751 } 2752 2753 } 2754 2755 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2756 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2757 mHandler.sendMessageDelayed( 2758 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2759 PROMPT_UNVALIDATED_DELAY_MS); 2760 } 2761 2762 private boolean mAvoidBadWifi; 2763 2764 public boolean avoidBadWifi() { 2765 return mAvoidBadWifi; 2766 } 2767 2768 @VisibleForTesting 2769 public boolean updateAvoidBadWifi() { 2770 // There are two modes: either we always automatically avoid unvalidated wifi, or we show a 2771 // dialog and don't switch to it. The behaviour is controlled by the NETWORK_AVOID_BAD_WIFI 2772 // setting. If the setting has no value, then the value is taken from the config value, 2773 // which can be changed via OEM/carrier overlays. 2774 // 2775 // The only valid values for NETWORK_AVOID_BAD_WIFI are null and unset. Currently, the unit 2776 // test uses 0 in order to avoid having to mock out fetching the carrier setting. 2777 int defaultAvoidBadWifi = 2778 mContext.getResources().getInteger(R.integer.config_networkAvoidBadWifi); 2779 int avoid = Settings.Global.getInt(mContext.getContentResolver(), 2780 Settings.Global.NETWORK_AVOID_BAD_WIFI, defaultAvoidBadWifi); 2781 2782 boolean prev = mAvoidBadWifi; 2783 mAvoidBadWifi = (avoid == 1); 2784 return mAvoidBadWifi != prev; 2785 } 2786 2787 private void showValidationNotification(NetworkAgentInfo nai, NotificationType type) { 2788 final String action; 2789 switch (type) { 2790 case NO_INTERNET: 2791 action = ConnectivityManager.ACTION_PROMPT_UNVALIDATED; 2792 break; 2793 case LOST_INTERNET: 2794 action = ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION; 2795 break; 2796 default: 2797 Slog.wtf(TAG, "Unknown notification type " + type); 2798 return; 2799 } 2800 2801 Intent intent = new Intent(action); 2802 intent.setData(Uri.fromParts("netId", Integer.toString(nai.network.netId), null)); 2803 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2804 intent.setClassName("com.android.settings", 2805 "com.android.settings.wifi.WifiNoInternetDialog"); 2806 2807 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2808 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2809 mNotifier.showNotification(nai.network.netId, type, nai, null, pendingIntent, true); 2810 } 2811 2812 private void handlePromptUnvalidated(Network network) { 2813 if (VDBG) log("handlePromptUnvalidated " + network); 2814 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2815 2816 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2817 // we haven't already been told to switch to it regardless of whether it validated or not. 2818 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2819 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2820 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2821 return; 2822 } 2823 showValidationNotification(nai, NotificationType.NO_INTERNET); 2824 } 2825 2826 // TODO: Delete this like updateMobileDataAlwaysOn above. 2827 @VisibleForTesting 2828 void updateNetworkAvoidBadWifi() { 2829 mHandler.sendEmptyMessage(EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI); 2830 } 2831 2832 private void handleNetworkUnvalidated(NetworkAgentInfo nai) { 2833 NetworkCapabilities nc = nai.networkCapabilities; 2834 if (DBG) log("handleNetworkUnvalidated " + nai.name() + " cap=" + nc); 2835 2836 if (nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) && !avoidBadWifi()) { 2837 showValidationNotification(nai, NotificationType.LOST_INTERNET); 2838 } 2839 } 2840 2841 private class InternalHandler extends Handler { 2842 public InternalHandler(Looper looper) { 2843 super(looper); 2844 } 2845 2846 @Override 2847 public void handleMessage(Message msg) { 2848 switch (msg.what) { 2849 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2850 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2851 String causedBy = null; 2852 synchronized (ConnectivityService.this) { 2853 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2854 mNetTransitionWakeLock.isHeld()) { 2855 mNetTransitionWakeLock.release(); 2856 causedBy = mNetTransitionWakeLockCausedBy; 2857 } else { 2858 break; 2859 } 2860 } 2861 if (VDBG) { 2862 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2863 log("Failed to find a new network - expiring NetTransition Wakelock"); 2864 } else { 2865 log("NetTransition Wakelock (" + 2866 (causedBy == null ? "unknown" : causedBy) + 2867 " cleared because we found a replacement network"); 2868 } 2869 } 2870 break; 2871 } 2872 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2873 handleDeprecatedGlobalHttpProxy(); 2874 break; 2875 } 2876 case EVENT_PROXY_HAS_CHANGED: { 2877 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2878 break; 2879 } 2880 case EVENT_REGISTER_NETWORK_FACTORY: { 2881 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2882 break; 2883 } 2884 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2885 handleUnregisterNetworkFactory((Messenger)msg.obj); 2886 break; 2887 } 2888 case EVENT_REGISTER_NETWORK_AGENT: { 2889 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2890 break; 2891 } 2892 case EVENT_REGISTER_NETWORK_REQUEST: 2893 case EVENT_REGISTER_NETWORK_LISTENER: { 2894 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2895 break; 2896 } 2897 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2898 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2899 handleRegisterNetworkRequestWithIntent(msg); 2900 break; 2901 } 2902 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2903 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2904 break; 2905 } 2906 case EVENT_RELEASE_NETWORK_REQUEST: { 2907 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2908 break; 2909 } 2910 case EVENT_SET_ACCEPT_UNVALIDATED: { 2911 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2912 break; 2913 } 2914 case EVENT_PROMPT_UNVALIDATED: { 2915 handlePromptUnvalidated((Network) msg.obj); 2916 break; 2917 } 2918 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2919 handleMobileDataAlwaysOn(); 2920 break; 2921 } 2922 case EVENT_CONFIGURE_NETWORK_AVOID_BAD_WIFI: { 2923 if (updateAvoidBadWifi()) { 2924 rematchAllNetworksAndRequests(null, 0); 2925 } 2926 break; 2927 } 2928 case EVENT_REQUEST_LINKPROPERTIES: 2929 handleRequestLinkProperties((NetworkRequest) msg.obj, msg.arg1); 2930 break; 2931 case EVENT_REQUEST_NETCAPABILITIES: 2932 handleRequestNetworkCapabilities((NetworkRequest) msg.obj, msg.arg1); 2933 break; 2934 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2935 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2936 mKeepaliveTracker.handleStartKeepalive(msg); 2937 break; 2938 } 2939 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2940 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2941 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2942 int slot = msg.arg1; 2943 int reason = msg.arg2; 2944 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2945 break; 2946 } 2947 case EVENT_SYSTEM_READY: { 2948 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2949 nai.networkMonitor.systemReady = true; 2950 } 2951 break; 2952 } 2953 } 2954 } 2955 } 2956 2957 // javadoc from interface 2958 @Override 2959 public int tether(String iface) { 2960 ConnectivityManager.enforceTetherChangePermission(mContext); 2961 if (isTetheringSupported()) { 2962 final int status = mTethering.tether(iface); 2963 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2964 try { 2965 mPolicyManager.onTetheringChanged(iface, true); 2966 } catch (RemoteException e) { 2967 } 2968 } 2969 return status; 2970 } else { 2971 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2972 } 2973 } 2974 2975 // javadoc from interface 2976 @Override 2977 public int untether(String iface) { 2978 ConnectivityManager.enforceTetherChangePermission(mContext); 2979 2980 if (isTetheringSupported()) { 2981 final int status = mTethering.untether(iface); 2982 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2983 try { 2984 mPolicyManager.onTetheringChanged(iface, false); 2985 } catch (RemoteException e) { 2986 } 2987 } 2988 return status; 2989 } else { 2990 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2991 } 2992 } 2993 2994 // javadoc from interface 2995 @Override 2996 public int getLastTetherError(String iface) { 2997 enforceTetherAccessPermission(); 2998 2999 if (isTetheringSupported()) { 3000 return mTethering.getLastTetherError(iface); 3001 } else { 3002 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3003 } 3004 } 3005 3006 // TODO - proper iface API for selection by property, inspection, etc 3007 @Override 3008 public String[] getTetherableUsbRegexs() { 3009 enforceTetherAccessPermission(); 3010 if (isTetheringSupported()) { 3011 return mTethering.getTetherableUsbRegexs(); 3012 } else { 3013 return new String[0]; 3014 } 3015 } 3016 3017 @Override 3018 public String[] getTetherableWifiRegexs() { 3019 enforceTetherAccessPermission(); 3020 if (isTetheringSupported()) { 3021 return mTethering.getTetherableWifiRegexs(); 3022 } else { 3023 return new String[0]; 3024 } 3025 } 3026 3027 @Override 3028 public String[] getTetherableBluetoothRegexs() { 3029 enforceTetherAccessPermission(); 3030 if (isTetheringSupported()) { 3031 return mTethering.getTetherableBluetoothRegexs(); 3032 } else { 3033 return new String[0]; 3034 } 3035 } 3036 3037 @Override 3038 public int setUsbTethering(boolean enable) { 3039 ConnectivityManager.enforceTetherChangePermission(mContext); 3040 if (isTetheringSupported()) { 3041 return mTethering.setUsbTethering(enable); 3042 } else { 3043 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 3044 } 3045 } 3046 3047 // TODO - move iface listing, queries, etc to new module 3048 // javadoc from interface 3049 @Override 3050 public String[] getTetherableIfaces() { 3051 enforceTetherAccessPermission(); 3052 return mTethering.getTetherableIfaces(); 3053 } 3054 3055 @Override 3056 public String[] getTetheredIfaces() { 3057 enforceTetherAccessPermission(); 3058 return mTethering.getTetheredIfaces(); 3059 } 3060 3061 @Override 3062 public String[] getTetheringErroredIfaces() { 3063 enforceTetherAccessPermission(); 3064 return mTethering.getErroredIfaces(); 3065 } 3066 3067 @Override 3068 public String[] getTetheredDhcpRanges() { 3069 enforceConnectivityInternalPermission(); 3070 return mTethering.getTetheredDhcpRanges(); 3071 } 3072 3073 // if ro.tether.denied = true we default to no tethering 3074 // gservices could set the secure setting to 1 though to enable it on a build where it 3075 // had previously been turned off. 3076 @Override 3077 public boolean isTetheringSupported() { 3078 enforceTetherAccessPermission(); 3079 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 3080 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 3081 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 3082 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 3083 return tetherEnabledInSettings && mUserManager.isAdminUser() && 3084 ((mTethering.getTetherableUsbRegexs().length != 0 || 3085 mTethering.getTetherableWifiRegexs().length != 0 || 3086 mTethering.getTetherableBluetoothRegexs().length != 0) && 3087 mTethering.getUpstreamIfaceTypes().length != 0); 3088 } 3089 3090 @Override 3091 public void startTethering(int type, ResultReceiver receiver, 3092 boolean showProvisioningUi) { 3093 ConnectivityManager.enforceTetherChangePermission(mContext); 3094 if (!isTetheringSupported()) { 3095 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 3096 return; 3097 } 3098 mTethering.startTethering(type, receiver, showProvisioningUi); 3099 } 3100 3101 @Override 3102 public void stopTethering(int type) { 3103 ConnectivityManager.enforceTetherChangePermission(mContext); 3104 mTethering.stopTethering(type); 3105 } 3106 3107 // Called when we lose the default network and have no replacement yet. 3108 // This will automatically be cleared after X seconds or a new default network 3109 // becomes CONNECTED, whichever happens first. The timer is started by the 3110 // first caller and not restarted by subsequent callers. 3111 private void requestNetworkTransitionWakelock(String forWhom) { 3112 int serialNum = 0; 3113 synchronized (this) { 3114 if (mNetTransitionWakeLock.isHeld()) return; 3115 serialNum = ++mNetTransitionWakeLockSerialNumber; 3116 mNetTransitionWakeLock.acquire(); 3117 mNetTransitionWakeLockCausedBy = forWhom; 3118 } 3119 mHandler.sendMessageDelayed(mHandler.obtainMessage( 3120 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 3121 mNetTransitionWakeLockTimeout); 3122 return; 3123 } 3124 3125 // 100 percent is full good, 0 is full bad. 3126 @Override 3127 public void reportInetCondition(int networkType, int percentage) { 3128 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 3129 if (nai == null) return; 3130 reportNetworkConnectivity(nai.network, percentage > 50); 3131 } 3132 3133 @Override 3134 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 3135 enforceAccessPermission(); 3136 enforceInternetPermission(); 3137 3138 NetworkAgentInfo nai; 3139 if (network == null) { 3140 nai = getDefaultNetwork(); 3141 } else { 3142 nai = getNetworkAgentInfoForNetwork(network); 3143 } 3144 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 3145 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 3146 return; 3147 } 3148 // Revalidate if the app report does not match our current validated state. 3149 if (hasConnectivity == nai.lastValidated) return; 3150 final int uid = Binder.getCallingUid(); 3151 if (DBG) { 3152 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 3153 ") by " + uid); 3154 } 3155 synchronized (nai) { 3156 // Validating a network that has not yet connected could result in a call to 3157 // rematchNetworkAndRequests() which is not meant to work on such networks. 3158 if (!nai.everConnected) return; 3159 3160 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 3161 3162 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 3163 } 3164 } 3165 3166 private ProxyInfo getDefaultProxy() { 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 ProxyInfo ret = mGlobalProxy; 3173 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3174 return ret; 3175 } 3176 } 3177 3178 @Override 3179 public ProxyInfo getProxyForNetwork(Network network) { 3180 if (network == null) return getDefaultProxy(); 3181 final ProxyInfo globalProxy = getGlobalProxy(); 3182 if (globalProxy != null) return globalProxy; 3183 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3184 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3185 // caller may not have. 3186 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3187 if (nai == null) return null; 3188 synchronized (nai) { 3189 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3190 if (proxyInfo == null) return null; 3191 return new ProxyInfo(proxyInfo); 3192 } 3193 } 3194 3195 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3196 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3197 // proxy is null then there is no proxy in place). 3198 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3199 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3200 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3201 proxy = null; 3202 } 3203 return proxy; 3204 } 3205 3206 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3207 // better for determining if a new proxy broadcast is necessary: 3208 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3209 // avoid unnecessary broadcasts. 3210 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3211 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3212 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3213 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3214 // all set. 3215 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3216 a = canonicalizeProxyInfo(a); 3217 b = canonicalizeProxyInfo(b); 3218 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3219 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3220 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3221 } 3222 3223 public void setGlobalProxy(ProxyInfo proxyProperties) { 3224 enforceConnectivityInternalPermission(); 3225 3226 synchronized (mProxyLock) { 3227 if (proxyProperties == mGlobalProxy) return; 3228 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3229 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3230 3231 String host = ""; 3232 int port = 0; 3233 String exclList = ""; 3234 String pacFileUrl = ""; 3235 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3236 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3237 if (!proxyProperties.isValid()) { 3238 if (DBG) 3239 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3240 return; 3241 } 3242 mGlobalProxy = new ProxyInfo(proxyProperties); 3243 host = mGlobalProxy.getHost(); 3244 port = mGlobalProxy.getPort(); 3245 exclList = mGlobalProxy.getExclusionListAsString(); 3246 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3247 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3248 } 3249 } else { 3250 mGlobalProxy = null; 3251 } 3252 ContentResolver res = mContext.getContentResolver(); 3253 final long token = Binder.clearCallingIdentity(); 3254 try { 3255 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3256 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3257 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3258 exclList); 3259 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3260 } finally { 3261 Binder.restoreCallingIdentity(token); 3262 } 3263 3264 if (mGlobalProxy == null) { 3265 proxyProperties = mDefaultProxy; 3266 } 3267 sendProxyBroadcast(proxyProperties); 3268 } 3269 } 3270 3271 private void loadGlobalProxy() { 3272 ContentResolver res = mContext.getContentResolver(); 3273 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3274 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3275 String exclList = Settings.Global.getString(res, 3276 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3277 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3278 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3279 ProxyInfo proxyProperties; 3280 if (!TextUtils.isEmpty(pacFileUrl)) { 3281 proxyProperties = new ProxyInfo(pacFileUrl); 3282 } else { 3283 proxyProperties = new ProxyInfo(host, port, exclList); 3284 } 3285 if (!proxyProperties.isValid()) { 3286 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3287 return; 3288 } 3289 3290 synchronized (mProxyLock) { 3291 mGlobalProxy = proxyProperties; 3292 } 3293 } 3294 } 3295 3296 public ProxyInfo getGlobalProxy() { 3297 // this information is already available as a world read/writable jvm property 3298 // so this API change wouldn't have a benifit. It also breaks the passing 3299 // of proxy info to all the JVMs. 3300 // enforceAccessPermission(); 3301 synchronized (mProxyLock) { 3302 return mGlobalProxy; 3303 } 3304 } 3305 3306 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3307 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3308 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3309 proxy = null; 3310 } 3311 synchronized (mProxyLock) { 3312 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3313 if (mDefaultProxy == proxy) return; // catches repeated nulls 3314 if (proxy != null && !proxy.isValid()) { 3315 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3316 return; 3317 } 3318 3319 // This call could be coming from the PacManager, containing the port of the local 3320 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3321 // global (to get the correct local port), and send a broadcast. 3322 // TODO: Switch PacManager to have its own message to send back rather than 3323 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3324 if ((mGlobalProxy != null) && (proxy != null) 3325 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3326 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3327 mGlobalProxy = proxy; 3328 sendProxyBroadcast(mGlobalProxy); 3329 return; 3330 } 3331 mDefaultProxy = proxy; 3332 3333 if (mGlobalProxy != null) return; 3334 if (!mDefaultProxyDisabled) { 3335 sendProxyBroadcast(proxy); 3336 } 3337 } 3338 } 3339 3340 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3341 // This method gets called when any network changes proxy, but the broadcast only ever contains 3342 // the default proxy (even if it hasn't changed). 3343 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3344 // world where an app might be bound to a non-default network. 3345 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3346 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3347 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3348 3349 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3350 sendProxyBroadcast(getDefaultProxy()); 3351 } 3352 } 3353 3354 private void handleDeprecatedGlobalHttpProxy() { 3355 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3356 Settings.Global.HTTP_PROXY); 3357 if (!TextUtils.isEmpty(proxy)) { 3358 String data[] = proxy.split(":"); 3359 if (data.length == 0) { 3360 return; 3361 } 3362 3363 String proxyHost = data[0]; 3364 int proxyPort = 8080; 3365 if (data.length > 1) { 3366 try { 3367 proxyPort = Integer.parseInt(data[1]); 3368 } catch (NumberFormatException e) { 3369 return; 3370 } 3371 } 3372 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3373 setGlobalProxy(p); 3374 } 3375 } 3376 3377 private void sendProxyBroadcast(ProxyInfo proxy) { 3378 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3379 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3380 if (DBG) log("sending Proxy Broadcast for " + proxy); 3381 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3382 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3383 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3384 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3385 final long ident = Binder.clearCallingIdentity(); 3386 try { 3387 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3388 } finally { 3389 Binder.restoreCallingIdentity(ident); 3390 } 3391 } 3392 3393 private static class SettingsObserver extends ContentObserver { 3394 final private HashMap<Uri, Integer> mUriEventMap; 3395 final private Context mContext; 3396 final private Handler mHandler; 3397 3398 SettingsObserver(Context context, Handler handler) { 3399 super(null); 3400 mUriEventMap = new HashMap<Uri, Integer>(); 3401 mContext = context; 3402 mHandler = handler; 3403 } 3404 3405 void observe(Uri uri, int what) { 3406 mUriEventMap.put(uri, what); 3407 final ContentResolver resolver = mContext.getContentResolver(); 3408 resolver.registerContentObserver(uri, false, this); 3409 } 3410 3411 @Override 3412 public void onChange(boolean selfChange) { 3413 Slog.wtf(TAG, "Should never be reached."); 3414 } 3415 3416 @Override 3417 public void onChange(boolean selfChange, Uri uri) { 3418 final Integer what = mUriEventMap.get(uri); 3419 if (what != null) { 3420 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3421 } else { 3422 loge("No matching event to send for URI=" + uri); 3423 } 3424 } 3425 } 3426 3427 private static void log(String s) { 3428 Slog.d(TAG, s); 3429 } 3430 3431 private static void loge(String s) { 3432 Slog.e(TAG, s); 3433 } 3434 3435 private static <T> T checkNotNull(T value, String message) { 3436 if (value == null) { 3437 throw new NullPointerException(message); 3438 } 3439 return value; 3440 } 3441 3442 /** 3443 * Prepare for a VPN application. 3444 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3445 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3446 * 3447 * @param oldPackage Package name of the application which currently controls VPN, which will 3448 * be replaced. If there is no such application, this should should either be 3449 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3450 * @param newPackage Package name of the application which should gain control of VPN, or 3451 * {@code null} to disable. 3452 * @param userId User for whom to prepare the new VPN. 3453 * 3454 * @hide 3455 */ 3456 @Override 3457 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3458 int userId) { 3459 enforceCrossUserPermission(userId); 3460 throwIfLockdownEnabled(); 3461 3462 synchronized(mVpns) { 3463 Vpn vpn = mVpns.get(userId); 3464 if (vpn != null) { 3465 return vpn.prepare(oldPackage, newPackage); 3466 } else { 3467 return false; 3468 } 3469 } 3470 } 3471 3472 /** 3473 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3474 * This method is used by system-privileged apps. 3475 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3476 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3477 * 3478 * @param packageName The package for which authorization state should change. 3479 * @param userId User for whom {@code packageName} is installed. 3480 * @param authorized {@code true} if this app should be able to start a VPN connection without 3481 * explicit user approval, {@code false} if not. 3482 * 3483 * @hide 3484 */ 3485 @Override 3486 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3487 enforceCrossUserPermission(userId); 3488 3489 synchronized(mVpns) { 3490 Vpn vpn = mVpns.get(userId); 3491 if (vpn != null) { 3492 vpn.setPackageAuthorization(packageName, authorized); 3493 } 3494 } 3495 } 3496 3497 /** 3498 * Configure a TUN interface and return its file descriptor. Parameters 3499 * are encoded and opaque to this class. This method is used by VpnBuilder 3500 * and not available in ConnectivityManager. Permissions are checked in 3501 * Vpn class. 3502 * @hide 3503 */ 3504 @Override 3505 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3506 throwIfLockdownEnabled(); 3507 int user = UserHandle.getUserId(Binder.getCallingUid()); 3508 synchronized(mVpns) { 3509 return mVpns.get(user).establish(config); 3510 } 3511 } 3512 3513 /** 3514 * Start legacy VPN, controlling native daemons as needed. Creates a 3515 * secondary thread to perform connection work, returning quickly. 3516 */ 3517 @Override 3518 public void startLegacyVpn(VpnProfile profile) { 3519 throwIfLockdownEnabled(); 3520 final LinkProperties egress = getActiveLinkProperties(); 3521 if (egress == null) { 3522 throw new IllegalStateException("Missing active network connection"); 3523 } 3524 int user = UserHandle.getUserId(Binder.getCallingUid()); 3525 synchronized(mVpns) { 3526 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3527 } 3528 } 3529 3530 /** 3531 * Return the information of the ongoing legacy VPN. This method is used 3532 * by VpnSettings and not available in ConnectivityManager. Permissions 3533 * are checked in Vpn class. 3534 */ 3535 @Override 3536 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3537 enforceCrossUserPermission(userId); 3538 3539 synchronized(mVpns) { 3540 return mVpns.get(userId).getLegacyVpnInfo(); 3541 } 3542 } 3543 3544 /** 3545 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3546 * and not available in ConnectivityManager. 3547 */ 3548 @Override 3549 public VpnInfo[] getAllVpnInfo() { 3550 enforceConnectivityInternalPermission(); 3551 if (mLockdownEnabled) { 3552 return new VpnInfo[0]; 3553 } 3554 3555 synchronized(mVpns) { 3556 List<VpnInfo> infoList = new ArrayList<>(); 3557 for (int i = 0; i < mVpns.size(); i++) { 3558 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3559 if (info != null) { 3560 infoList.add(info); 3561 } 3562 } 3563 return infoList.toArray(new VpnInfo[infoList.size()]); 3564 } 3565 } 3566 3567 /** 3568 * @return VPN information for accounting, or null if we can't retrieve all required 3569 * information, e.g primary underlying iface. 3570 */ 3571 @Nullable 3572 private VpnInfo createVpnInfo(Vpn vpn) { 3573 VpnInfo info = vpn.getVpnInfo(); 3574 if (info == null) { 3575 return null; 3576 } 3577 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3578 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3579 // the underlyingNetworks list. 3580 if (underlyingNetworks == null) { 3581 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3582 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3583 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3584 } 3585 } else if (underlyingNetworks.length > 0) { 3586 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3587 if (linkProperties != null) { 3588 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3589 } 3590 } 3591 return info.primaryUnderlyingIface == null ? null : info; 3592 } 3593 3594 /** 3595 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3596 * VpnDialogs and not available in ConnectivityManager. 3597 * Permissions are checked in Vpn class. 3598 * @hide 3599 */ 3600 @Override 3601 public VpnConfig getVpnConfig(int userId) { 3602 enforceCrossUserPermission(userId); 3603 synchronized(mVpns) { 3604 Vpn vpn = mVpns.get(userId); 3605 if (vpn != null) { 3606 return vpn.getVpnConfig(); 3607 } else { 3608 return null; 3609 } 3610 } 3611 } 3612 3613 @Override 3614 public boolean updateLockdownVpn() { 3615 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3616 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3617 return false; 3618 } 3619 3620 // Tear down existing lockdown if profile was removed 3621 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3622 if (mLockdownEnabled) { 3623 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3624 final VpnProfile profile = VpnProfile.decode( 3625 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3626 if (profile == null) { 3627 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3628 setLockdownTracker(null); 3629 return true; 3630 } 3631 int user = UserHandle.getUserId(Binder.getCallingUid()); 3632 synchronized(mVpns) { 3633 Vpn vpn = mVpns.get(user); 3634 if (vpn == null) { 3635 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3636 return false; 3637 } 3638 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3639 } 3640 } else { 3641 setLockdownTracker(null); 3642 } 3643 3644 return true; 3645 } 3646 3647 /** 3648 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3649 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3650 */ 3651 private void setLockdownTracker(LockdownVpnTracker tracker) { 3652 // Shutdown any existing tracker 3653 final LockdownVpnTracker existing = mLockdownTracker; 3654 mLockdownTracker = null; 3655 if (existing != null) { 3656 existing.shutdown(); 3657 } 3658 3659 try { 3660 if (tracker != null) { 3661 mNetd.setFirewallEnabled(true); 3662 mNetd.setFirewallInterfaceRule("lo", true); 3663 mLockdownTracker = tracker; 3664 mLockdownTracker.init(); 3665 } else { 3666 mNetd.setFirewallEnabled(false); 3667 } 3668 } catch (RemoteException e) { 3669 // ignored; NMS lives inside system_server 3670 } 3671 } 3672 3673 private void throwIfLockdownEnabled() { 3674 if (mLockdownEnabled) { 3675 throw new IllegalStateException("Unavailable in lockdown mode"); 3676 } 3677 } 3678 3679 /** 3680 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3681 * some setup and then call {@code establish()} to connect. 3682 * 3683 * @return {@code true} if the service was started, the service was already connected, or there 3684 * was no always-on VPN to start. {@code false} otherwise. 3685 */ 3686 private boolean startAlwaysOnVpn(int userId) { 3687 synchronized (mVpns) { 3688 Vpn vpn = mVpns.get(userId); 3689 if (vpn == null) { 3690 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3691 // exists already. 3692 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3693 return false; 3694 } 3695 3696 return vpn.startAlwaysOnVpn(); 3697 } 3698 } 3699 3700 @Override 3701 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3702 enforceConnectivityInternalPermission(); 3703 enforceCrossUserPermission(userId); 3704 3705 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3706 if (LockdownVpnTracker.isEnabled()) { 3707 return false; 3708 } 3709 3710 synchronized (mVpns) { 3711 Vpn vpn = mVpns.get(userId); 3712 if (vpn == null) { 3713 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3714 return false; 3715 } 3716 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3717 return false; 3718 } 3719 if (!startAlwaysOnVpn(userId)) { 3720 vpn.setAlwaysOnPackage(null, false); 3721 return false; 3722 } 3723 3724 vpn.saveAlwaysOnPackage(); 3725 } 3726 return true; 3727 } 3728 3729 @Override 3730 public String getAlwaysOnVpnPackage(int userId) { 3731 enforceConnectivityInternalPermission(); 3732 enforceCrossUserPermission(userId); 3733 3734 synchronized (mVpns) { 3735 Vpn vpn = mVpns.get(userId); 3736 if (vpn == null) { 3737 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3738 return null; 3739 } 3740 return vpn.getAlwaysOnPackage(); 3741 } 3742 } 3743 3744 @Override 3745 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3746 // TODO: Remove? Any reason to trigger a provisioning check? 3747 return -1; 3748 } 3749 3750 /** Location to an updatable file listing carrier provisioning urls. 3751 * An example: 3752 * 3753 * <?xml version="1.0" encoding="utf-8"?> 3754 * <provisioningUrls> 3755 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3756 * </provisioningUrls> 3757 */ 3758 private static final String PROVISIONING_URL_PATH = 3759 "/data/misc/radio/provisioning_urls.xml"; 3760 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3761 3762 /** XML tag for root element. */ 3763 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3764 /** XML tag for individual url */ 3765 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3766 /** XML attribute for mcc */ 3767 private static final String ATTR_MCC = "mcc"; 3768 /** XML attribute for mnc */ 3769 private static final String ATTR_MNC = "mnc"; 3770 3771 private String getProvisioningUrlBaseFromFile() { 3772 FileReader fileReader = null; 3773 XmlPullParser parser = null; 3774 Configuration config = mContext.getResources().getConfiguration(); 3775 3776 try { 3777 fileReader = new FileReader(mProvisioningUrlFile); 3778 parser = Xml.newPullParser(); 3779 parser.setInput(fileReader); 3780 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3781 3782 while (true) { 3783 XmlUtils.nextElement(parser); 3784 3785 String element = parser.getName(); 3786 if (element == null) break; 3787 3788 if (element.equals(TAG_PROVISIONING_URL)) { 3789 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3790 try { 3791 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3792 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3793 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3794 parser.next(); 3795 if (parser.getEventType() == XmlPullParser.TEXT) { 3796 return parser.getText(); 3797 } 3798 } 3799 } 3800 } catch (NumberFormatException e) { 3801 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3802 } 3803 } 3804 } 3805 return null; 3806 } catch (FileNotFoundException e) { 3807 loge("Carrier Provisioning Urls file not found"); 3808 } catch (XmlPullParserException e) { 3809 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3810 } catch (IOException e) { 3811 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3812 } finally { 3813 if (fileReader != null) { 3814 try { 3815 fileReader.close(); 3816 } catch (IOException e) {} 3817 } 3818 } 3819 return null; 3820 } 3821 3822 @Override 3823 public String getMobileProvisioningUrl() { 3824 enforceConnectivityInternalPermission(); 3825 String url = getProvisioningUrlBaseFromFile(); 3826 if (TextUtils.isEmpty(url)) { 3827 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3828 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3829 } else { 3830 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3831 } 3832 // populate the iccid, imei and phone number in the provisioning url. 3833 if (!TextUtils.isEmpty(url)) { 3834 String phoneNumber = mTelephonyManager.getLine1Number(); 3835 if (TextUtils.isEmpty(phoneNumber)) { 3836 phoneNumber = "0000000000"; 3837 } 3838 url = String.format(url, 3839 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3840 mTelephonyManager.getDeviceId() /* IMEI */, 3841 phoneNumber /* Phone numer */); 3842 } 3843 3844 return url; 3845 } 3846 3847 @Override 3848 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3849 String action) { 3850 enforceConnectivityInternalPermission(); 3851 final long ident = Binder.clearCallingIdentity(); 3852 try { 3853 // Concatenate the range of types onto the range of NetIDs. 3854 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3855 mNotifier.setProvNotificationVisible(visible, id, action); 3856 } finally { 3857 Binder.restoreCallingIdentity(ident); 3858 } 3859 } 3860 3861 @Override 3862 public void setAirplaneMode(boolean enable) { 3863 enforceConnectivityInternalPermission(); 3864 final long ident = Binder.clearCallingIdentity(); 3865 try { 3866 final ContentResolver cr = mContext.getContentResolver(); 3867 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3868 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3869 intent.putExtra("state", enable); 3870 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3871 } finally { 3872 Binder.restoreCallingIdentity(ident); 3873 } 3874 } 3875 3876 private void onUserStart(int userId) { 3877 synchronized(mVpns) { 3878 Vpn userVpn = mVpns.get(userId); 3879 if (userVpn != null) { 3880 loge("Starting user already has a VPN"); 3881 return; 3882 } 3883 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3884 mVpns.put(userId, userVpn); 3885 3886 final ContentResolver cr = mContext.getContentResolver(); 3887 String alwaysOnPackage = Settings.Secure.getStringForUser(cr, 3888 Settings.Secure.ALWAYS_ON_VPN_APP, userId); 3889 final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, 3890 Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; 3891 if (alwaysOnPackage != null) { 3892 userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); 3893 } 3894 } 3895 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3896 updateLockdownVpn(); 3897 } 3898 } 3899 3900 private void onUserStop(int userId) { 3901 synchronized(mVpns) { 3902 Vpn userVpn = mVpns.get(userId); 3903 if (userVpn == null) { 3904 loge("Stopped user has no VPN"); 3905 return; 3906 } 3907 userVpn.onUserStopped(); 3908 mVpns.delete(userId); 3909 } 3910 } 3911 3912 private void onUserAdded(int userId) { 3913 synchronized(mVpns) { 3914 final int vpnsSize = mVpns.size(); 3915 for (int i = 0; i < vpnsSize; i++) { 3916 Vpn vpn = mVpns.valueAt(i); 3917 vpn.onUserAdded(userId); 3918 } 3919 } 3920 } 3921 3922 private void onUserRemoved(int userId) { 3923 synchronized(mVpns) { 3924 final int vpnsSize = mVpns.size(); 3925 for (int i = 0; i < vpnsSize; i++) { 3926 Vpn vpn = mVpns.valueAt(i); 3927 vpn.onUserRemoved(userId); 3928 } 3929 } 3930 } 3931 3932 private void onUserUnlocked(int userId) { 3933 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3934 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3935 updateLockdownVpn(); 3936 } else { 3937 startAlwaysOnVpn(userId); 3938 } 3939 } 3940 3941 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3942 @Override 3943 public void onReceive(Context context, Intent intent) { 3944 final String action = intent.getAction(); 3945 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3946 if (userId == UserHandle.USER_NULL) return; 3947 3948 if (Intent.ACTION_USER_STARTED.equals(action)) { 3949 onUserStart(userId); 3950 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3951 onUserStop(userId); 3952 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3953 onUserAdded(userId); 3954 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3955 onUserRemoved(userId); 3956 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3957 onUserUnlocked(userId); 3958 } 3959 } 3960 }; 3961 3962 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3963 new HashMap<Messenger, NetworkFactoryInfo>(); 3964 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3965 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3966 3967 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3968 // Map from UID to number of NetworkRequests that UID has filed. 3969 @GuardedBy("mUidToNetworkRequestCount") 3970 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3971 3972 private static class NetworkFactoryInfo { 3973 public final String name; 3974 public final Messenger messenger; 3975 public final AsyncChannel asyncChannel; 3976 3977 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3978 this.name = name; 3979 this.messenger = messenger; 3980 this.asyncChannel = asyncChannel; 3981 } 3982 } 3983 3984 private void ensureNetworkRequestHasType(NetworkRequest request) { 3985 if (request.type == NetworkRequest.Type.NONE) { 3986 throw new IllegalArgumentException( 3987 "All NetworkRequests in ConnectivityService must have a type"); 3988 } 3989 } 3990 3991 /** 3992 * Tracks info about the requester. 3993 * Also used to notice when the calling process dies so we can self-expire 3994 */ 3995 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3996 final NetworkRequest request; 3997 final PendingIntent mPendingIntent; 3998 boolean mPendingIntentSent; 3999 private final IBinder mBinder; 4000 final int mPid; 4001 final int mUid; 4002 final Messenger messenger; 4003 4004 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 4005 request = r; 4006 ensureNetworkRequestHasType(request); 4007 mPendingIntent = pi; 4008 messenger = null; 4009 mBinder = null; 4010 mPid = getCallingPid(); 4011 mUid = getCallingUid(); 4012 enforceRequestCountLimit(); 4013 } 4014 4015 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 4016 super(); 4017 messenger = m; 4018 request = r; 4019 ensureNetworkRequestHasType(request); 4020 mBinder = binder; 4021 mPid = getCallingPid(); 4022 mUid = getCallingUid(); 4023 mPendingIntent = null; 4024 enforceRequestCountLimit(); 4025 4026 try { 4027 mBinder.linkToDeath(this, 0); 4028 } catch (RemoteException e) { 4029 binderDied(); 4030 } 4031 } 4032 4033 private void enforceRequestCountLimit() { 4034 synchronized (mUidToNetworkRequestCount) { 4035 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 4036 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 4037 throw new IllegalArgumentException("Too many NetworkRequests filed"); 4038 } 4039 mUidToNetworkRequestCount.put(mUid, networkRequests); 4040 } 4041 } 4042 4043 void unlinkDeathRecipient() { 4044 if (mBinder != null) { 4045 mBinder.unlinkToDeath(this, 0); 4046 } 4047 } 4048 4049 public void binderDied() { 4050 log("ConnectivityService NetworkRequestInfo binderDied(" + 4051 request + ", " + mBinder + ")"); 4052 releaseNetworkRequest(request); 4053 } 4054 4055 public String toString() { 4056 return "uid/pid:" + mUid + "/" + mPid + " " + request + 4057 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 4058 } 4059 } 4060 4061 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 4062 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 4063 if (badCapability != null) { 4064 throw new IllegalArgumentException("Cannot request network with " + badCapability); 4065 } 4066 } 4067 4068 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 4069 final SortedSet<Integer> thresholds = new TreeSet(); 4070 synchronized (nai) { 4071 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4072 if (nri.request.networkCapabilities.hasSignalStrength() && 4073 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 4074 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 4075 } 4076 } 4077 } 4078 return new ArrayList<Integer>(thresholds); 4079 } 4080 4081 private void updateSignalStrengthThresholds( 4082 NetworkAgentInfo nai, String reason, NetworkRequest request) { 4083 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 4084 Bundle thresholds = new Bundle(); 4085 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 4086 4087 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 4088 String detail; 4089 if (request != null && request.networkCapabilities.hasSignalStrength()) { 4090 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 4091 } else { 4092 detail = reason; 4093 } 4094 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 4095 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 4096 } 4097 4098 nai.asyncChannel.sendMessage( 4099 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 4100 0, 0, thresholds); 4101 } 4102 4103 @Override 4104 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 4105 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 4106 final NetworkRequest.Type type = (networkCapabilities == null) 4107 ? NetworkRequest.Type.TRACK_DEFAULT 4108 : NetworkRequest.Type.REQUEST; 4109 // If the requested networkCapabilities is null, take them instead from 4110 // the default network request. This allows callers to keep track of 4111 // the system default network. 4112 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 4113 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 4114 enforceAccessPermission(); 4115 } else { 4116 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4117 enforceNetworkRequestPermissions(networkCapabilities); 4118 // TODO: this is incorrect. We mark the request as metered or not depending on the state 4119 // of the app when the request is filed, but we never change the request if the app 4120 // changes network state. http://b/29964605 4121 enforceMeteredApnPolicy(networkCapabilities); 4122 } 4123 ensureRequestableCapabilities(networkCapabilities); 4124 4125 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 4126 throw new IllegalArgumentException("Bad timeout specified"); 4127 } 4128 4129 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 4130 .equals(networkCapabilities.getNetworkSpecifier())) { 4131 throw new IllegalArgumentException("Invalid network specifier - must not be '" 4132 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 4133 } 4134 4135 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4136 nextNetworkRequestId(), type); 4137 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4138 if (DBG) log("requestNetwork for " + nri); 4139 4140 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4141 if (timeoutMs > 0) { 4142 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4143 nri), timeoutMs); 4144 } 4145 return networkRequest; 4146 } 4147 4148 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4149 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4150 enforceConnectivityRestrictedNetworksPermission(); 4151 } else { 4152 enforceChangePermission(); 4153 } 4154 } 4155 4156 @Override 4157 public boolean requestBandwidthUpdate(Network network) { 4158 enforceAccessPermission(); 4159 NetworkAgentInfo nai = null; 4160 if (network == null) { 4161 return false; 4162 } 4163 synchronized (mNetworkForNetId) { 4164 nai = mNetworkForNetId.get(network.netId); 4165 } 4166 if (nai != null) { 4167 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4168 return true; 4169 } 4170 return false; 4171 } 4172 4173 private boolean isSystem(int uid) { 4174 return uid < Process.FIRST_APPLICATION_UID; 4175 } 4176 4177 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4178 final int uid = Binder.getCallingUid(); 4179 if (isSystem(uid)) { 4180 return; 4181 } 4182 // if UID is restricted, don't allow them to bring up metered APNs 4183 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 4184 final int uidRules; 4185 synchronized(mRulesLock) { 4186 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 4187 } 4188 if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 4189 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { 4190 // we could silently fail or we can filter the available nets to only give 4191 // them those they have access to. Chose the more useful option. 4192 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4193 } 4194 } 4195 } 4196 4197 @Override 4198 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4199 PendingIntent operation) { 4200 checkNotNull(operation, "PendingIntent cannot be null."); 4201 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4202 enforceNetworkRequestPermissions(networkCapabilities); 4203 enforceMeteredApnPolicy(networkCapabilities); 4204 ensureRequestableCapabilities(networkCapabilities); 4205 4206 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4207 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4208 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4209 if (DBG) log("pendingRequest for " + nri); 4210 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4211 nri)); 4212 return networkRequest; 4213 } 4214 4215 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4216 mHandler.sendMessageDelayed( 4217 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4218 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4219 } 4220 4221 @Override 4222 public void releasePendingNetworkRequest(PendingIntent operation) { 4223 checkNotNull(operation, "PendingIntent cannot be null."); 4224 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4225 getCallingUid(), 0, operation)); 4226 } 4227 4228 // In order to implement the compatibility measure for pre-M apps that call 4229 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4230 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4231 // This ensures it has permission to do so. 4232 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4233 if (nc == null) { 4234 return false; 4235 } 4236 int[] transportTypes = nc.getTransportTypes(); 4237 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4238 return false; 4239 } 4240 try { 4241 mContext.enforceCallingOrSelfPermission( 4242 android.Manifest.permission.ACCESS_WIFI_STATE, 4243 "ConnectivityService"); 4244 } catch (SecurityException e) { 4245 return false; 4246 } 4247 return true; 4248 } 4249 4250 @Override 4251 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4252 Messenger messenger, IBinder binder) { 4253 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4254 enforceAccessPermission(); 4255 } 4256 4257 NetworkRequest networkRequest = new NetworkRequest( 4258 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4259 NetworkRequest.Type.LISTEN); 4260 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4261 if (VDBG) log("listenForNetwork for " + nri); 4262 4263 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4264 return networkRequest; 4265 } 4266 4267 @Override 4268 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4269 PendingIntent operation) { 4270 checkNotNull(operation, "PendingIntent cannot be null."); 4271 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4272 enforceAccessPermission(); 4273 } 4274 4275 NetworkRequest networkRequest = new NetworkRequest( 4276 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4277 NetworkRequest.Type.LISTEN); 4278 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4279 if (VDBG) log("pendingListenForNetwork for " + nri); 4280 4281 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4282 } 4283 4284 @Override 4285 public void requestLinkProperties(NetworkRequest networkRequest) { 4286 ensureNetworkRequestHasType(networkRequest); 4287 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4288 mHandler.sendMessage(mHandler.obtainMessage( 4289 EVENT_REQUEST_LINKPROPERTIES, getCallingUid(), 0, networkRequest)); 4290 } 4291 4292 @Override 4293 public void requestNetworkCapabilities(NetworkRequest networkRequest) { 4294 ensureNetworkRequestHasType(networkRequest); 4295 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4296 mHandler.sendMessage(mHandler.obtainMessage( 4297 EVENT_REQUEST_NETCAPABILITIES, getCallingUid(), 0, networkRequest)); 4298 } 4299 4300 @Override 4301 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4302 ensureNetworkRequestHasType(networkRequest); 4303 mHandler.sendMessage(mHandler.obtainMessage( 4304 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4305 } 4306 4307 @Override 4308 public void registerNetworkFactory(Messenger messenger, String name) { 4309 enforceConnectivityInternalPermission(); 4310 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4311 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4312 } 4313 4314 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4315 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4316 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4317 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4318 } 4319 4320 @Override 4321 public void unregisterNetworkFactory(Messenger messenger) { 4322 enforceConnectivityInternalPermission(); 4323 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4324 } 4325 4326 private void handleUnregisterNetworkFactory(Messenger messenger) { 4327 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4328 if (nfi == null) { 4329 loge("Failed to find Messenger in unregisterNetworkFactory"); 4330 return; 4331 } 4332 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4333 } 4334 4335 /** 4336 * NetworkAgentInfo supporting a request by requestId. 4337 * These have already been vetted (their Capabilities satisfy the request) 4338 * and the are the highest scored network available. 4339 * the are keyed off the Requests requestId. 4340 */ 4341 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4342 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4343 new SparseArray<NetworkAgentInfo>(); 4344 4345 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4346 @GuardedBy("mNetworkForNetId") 4347 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4348 new SparseArray<NetworkAgentInfo>(); 4349 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4350 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4351 // there may not be a strict 1:1 correlation between the two. 4352 @GuardedBy("mNetworkForNetId") 4353 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4354 4355 // NetworkAgentInfo keyed off its connecting messenger 4356 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4357 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4358 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4359 new HashMap<Messenger, NetworkAgentInfo>(); 4360 4361 @GuardedBy("mBlockedAppUids") 4362 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4363 4364 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4365 private final NetworkRequest mDefaultRequest; 4366 4367 // Request used to optionally keep mobile data active even when higher 4368 // priority networks like Wi-Fi are active. 4369 private final NetworkRequest mDefaultMobileDataRequest; 4370 4371 private NetworkAgentInfo getDefaultNetwork() { 4372 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4373 } 4374 4375 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4376 return nai == getDefaultNetwork(); 4377 } 4378 4379 private boolean isDefaultRequest(NetworkRequestInfo nri) { 4380 return nri.request.requestId == mDefaultRequest.requestId; 4381 } 4382 4383 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4384 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4385 int currentScore, NetworkMisc networkMisc) { 4386 enforceConnectivityInternalPermission(); 4387 4388 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4389 // satisfies mDefaultRequest. 4390 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4391 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4392 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4393 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4394 synchronized (this) { 4395 nai.networkMonitor.systemReady = mSystemReady; 4396 } 4397 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, 4398 networkInfo.getExtraInfo()); 4399 if (DBG) log("registerNetworkAgent " + nai); 4400 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4401 return nai.network.netId; 4402 } 4403 4404 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4405 if (VDBG) log("Got NetworkAgent Messenger"); 4406 mNetworkAgentInfos.put(na.messenger, na); 4407 synchronized (mNetworkForNetId) { 4408 mNetworkForNetId.put(na.network.netId, na); 4409 } 4410 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4411 NetworkInfo networkInfo = na.networkInfo; 4412 na.networkInfo = null; 4413 updateNetworkInfo(na, networkInfo); 4414 } 4415 4416 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4417 LinkProperties newLp = networkAgent.linkProperties; 4418 int netId = networkAgent.network.netId; 4419 4420 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4421 // we do anything else, make sure its LinkProperties are accurate. 4422 if (networkAgent.clatd != null) { 4423 networkAgent.clatd.fixupLinkProperties(oldLp); 4424 } 4425 4426 updateInterfaces(newLp, oldLp, netId); 4427 updateMtu(newLp, oldLp); 4428 // TODO - figure out what to do for clat 4429// for (LinkProperties lp : newLp.getStackedLinks()) { 4430// updateMtu(lp, null); 4431// } 4432 updateTcpBufferSizes(networkAgent); 4433 4434 updateRoutes(newLp, oldLp, netId); 4435 updateDnses(newLp, oldLp, netId); 4436 4437 updateClat(newLp, oldLp, networkAgent); 4438 if (isDefaultNetwork(networkAgent)) { 4439 handleApplyDefaultProxy(newLp.getHttpProxy()); 4440 } else { 4441 updateProxy(newLp, oldLp, networkAgent); 4442 } 4443 // TODO - move this check to cover the whole function 4444 if (!Objects.equals(newLp, oldLp)) { 4445 notifyIfacesChangedForNetworkStats(); 4446 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4447 } 4448 4449 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4450 } 4451 4452 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4453 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4454 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4455 4456 if (!wasRunningClat && shouldRunClat) { 4457 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4458 nai.clatd.start(); 4459 } else if (wasRunningClat && !shouldRunClat) { 4460 nai.clatd.stop(); 4461 } 4462 } 4463 4464 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4465 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4466 if (oldLp != null) { 4467 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4468 } else if (newLp != null) { 4469 interfaceDiff.added = newLp.getAllInterfaceNames(); 4470 } 4471 for (String iface : interfaceDiff.added) { 4472 try { 4473 if (DBG) log("Adding iface " + iface + " to network " + netId); 4474 mNetd.addInterfaceToNetwork(iface, netId); 4475 } catch (Exception e) { 4476 loge("Exception adding interface: " + e); 4477 } 4478 } 4479 for (String iface : interfaceDiff.removed) { 4480 try { 4481 if (DBG) log("Removing iface " + iface + " from network " + netId); 4482 mNetd.removeInterfaceFromNetwork(iface, netId); 4483 } catch (Exception e) { 4484 loge("Exception removing interface: " + e); 4485 } 4486 } 4487 } 4488 4489 /** 4490 * Have netd update routes from oldLp to newLp. 4491 * @return true if routes changed between oldLp and newLp 4492 */ 4493 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4494 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4495 if (oldLp != null) { 4496 routeDiff = oldLp.compareAllRoutes(newLp); 4497 } else if (newLp != null) { 4498 routeDiff.added = newLp.getAllRoutes(); 4499 } 4500 4501 // add routes before removing old in case it helps with continuous connectivity 4502 4503 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4504 for (RouteInfo route : routeDiff.added) { 4505 if (route.hasGateway()) continue; 4506 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4507 try { 4508 mNetd.addRoute(netId, route); 4509 } catch (Exception e) { 4510 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4511 loge("Exception in addRoute for non-gateway: " + e); 4512 } 4513 } 4514 } 4515 for (RouteInfo route : routeDiff.added) { 4516 if (route.hasGateway() == false) continue; 4517 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4518 try { 4519 mNetd.addRoute(netId, route); 4520 } catch (Exception e) { 4521 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4522 loge("Exception in addRoute for gateway: " + e); 4523 } 4524 } 4525 } 4526 4527 for (RouteInfo route : routeDiff.removed) { 4528 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4529 try { 4530 mNetd.removeRoute(netId, route); 4531 } catch (Exception e) { 4532 loge("Exception in removeRoute: " + e); 4533 } 4534 } 4535 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4536 } 4537 4538 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4539 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4540 return; // no updating necessary 4541 } 4542 4543 Collection<InetAddress> dnses = newLp.getDnsServers(); 4544 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4545 try { 4546 mNetd.setDnsConfigurationForNetwork( 4547 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4548 } catch (Exception e) { 4549 loge("Exception in setDnsConfigurationForNetwork: " + e); 4550 } 4551 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4552 if (defaultNai != null && defaultNai.network.netId == netId) { 4553 setDefaultDnsSystemProperties(dnses); 4554 } 4555 flushVmDnsCache(); 4556 } 4557 4558 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4559 int last = 0; 4560 for (InetAddress dns : dnses) { 4561 ++last; 4562 String key = "net.dns" + last; 4563 String value = dns.getHostAddress(); 4564 SystemProperties.set(key, value); 4565 } 4566 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4567 String key = "net.dns" + i; 4568 SystemProperties.set(key, ""); 4569 } 4570 mNumDnsEntries = last; 4571 } 4572 4573 /** 4574 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4575 * augmented with any stateful capabilities implied from {@code networkAgent} 4576 * (e.g., validated status and captive portal status). 4577 * 4578 * @param oldScore score of the network before any of the changes that prompted us 4579 * to call this function. 4580 * @param nai the network having its capabilities updated. 4581 * @param networkCapabilities the new network capabilities. 4582 */ 4583 private void updateCapabilities( 4584 int oldScore, NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4585 if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( 4586 networkCapabilities)) { 4587 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 4588 + nai.networkCapabilities + " -> " + networkCapabilities); 4589 } 4590 4591 // Don't modify caller's NetworkCapabilities. 4592 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4593 if (nai.lastValidated) { 4594 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4595 } else { 4596 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4597 } 4598 if (nai.lastCaptivePortalDetected) { 4599 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4600 } else { 4601 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4602 } 4603 if (nai.isBackgroundNetwork()) { 4604 networkCapabilities.removeCapability(NET_CAPABILITY_FOREGROUND); 4605 } else { 4606 networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 4607 } 4608 4609 if (Objects.equals(nai.networkCapabilities, networkCapabilities)) return; 4610 4611 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4612 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4613 try { 4614 mNetd.setNetworkPermission(nai.network.netId, 4615 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4616 null : NetworkManagementService.PERMISSION_SYSTEM); 4617 } catch (RemoteException e) { 4618 loge("Exception in setNetworkPermission: " + e); 4619 } 4620 } 4621 4622 final NetworkCapabilities prevNc = nai.networkCapabilities; 4623 synchronized (nai) { 4624 nai.networkCapabilities = networkCapabilities; 4625 } 4626 if (nai.getCurrentScore() == oldScore && 4627 networkCapabilities.equalRequestableCapabilities(prevNc)) { 4628 // If the requestable capabilities haven't changed, and the score hasn't changed, then 4629 // the change we're processing can't affect any requests, it can only affect the listens 4630 // on this network. We might have been called by rematchNetworkAndRequests when a 4631 // network changed foreground state. 4632 processListenRequests(nai, true); 4633 } else { 4634 // If the requestable capabilities have changed or the score changed, we can't have been 4635 // called by rematchNetworkAndRequests, so it's safe to start a rematch. 4636 rematchAllNetworksAndRequests(nai, oldScore); 4637 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4638 } 4639 } 4640 4641 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4642 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4643 NetworkRequest nr = nai.requestAt(i); 4644 // Don't send listening requests to factories. b/17393458 4645 if (nr.isListen()) continue; 4646 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4647 } 4648 } 4649 4650 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4651 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4652 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4653 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4654 networkRequest); 4655 } 4656 } 4657 4658 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4659 int notificationType) { 4660 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4661 Intent intent = new Intent(); 4662 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4663 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4664 nri.mPendingIntentSent = true; 4665 sendIntent(nri.mPendingIntent, intent); 4666 } 4667 // else not handled 4668 } 4669 4670 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4671 mPendingIntentWakeLock.acquire(); 4672 try { 4673 if (DBG) log("Sending " + pendingIntent); 4674 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4675 } catch (PendingIntent.CanceledException e) { 4676 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4677 mPendingIntentWakeLock.release(); 4678 releasePendingNetworkRequest(pendingIntent); 4679 } 4680 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4681 } 4682 4683 @Override 4684 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4685 String resultData, Bundle resultExtras) { 4686 if (DBG) log("Finished sending " + pendingIntent); 4687 mPendingIntentWakeLock.release(); 4688 // Release with a delay so the receiving client has an opportunity to put in its 4689 // own request. 4690 releasePendingNetworkRequestWithDelay(pendingIntent); 4691 } 4692 4693 private void callCallbackForRequest(NetworkRequestInfo nri, 4694 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 4695 if (nri.messenger == null) return; // Default request has no msgr 4696 Bundle bundle = new Bundle(); 4697 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4698 new NetworkRequest(nri.request)); 4699 Message msg = Message.obtain(); 4700 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4701 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4702 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4703 } 4704 switch (notificationType) { 4705 case ConnectivityManager.CALLBACK_LOSING: { 4706 msg.arg1 = arg1; 4707 break; 4708 } 4709 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4710 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4711 new NetworkCapabilities(networkAgent.networkCapabilities)); 4712 break; 4713 } 4714 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4715 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4716 new LinkProperties(networkAgent.linkProperties)); 4717 break; 4718 } 4719 } 4720 msg.what = notificationType; 4721 msg.setData(bundle); 4722 try { 4723 if (VDBG) { 4724 log("sending notification " + notifyTypeToName(notificationType) + 4725 " for " + nri.request); 4726 } 4727 nri.messenger.send(msg); 4728 } catch (RemoteException e) { 4729 // may occur naturally in the race of binder death. 4730 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4731 } 4732 } 4733 4734 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4735 if (nai.numRequestNetworkRequests() != 0) { 4736 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4737 NetworkRequest nr = nai.requestAt(i); 4738 // Ignore listening requests. 4739 if (nr.isListen()) continue; 4740 loge("Dead network still had at least " + nr); 4741 break; 4742 } 4743 } 4744 nai.asyncChannel.disconnect(); 4745 } 4746 4747 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4748 if (oldNetwork == null) { 4749 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4750 return; 4751 } 4752 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4753 4754 // If we get here it means that the last linger timeout for this network expired. So there 4755 // must be no other active linger timers, and we must stop lingering. 4756 oldNetwork.clearLingerState(); 4757 4758 if (unneeded(oldNetwork, UnneededFor.TEARDOWN)) { 4759 // Tear the network down. 4760 teardownUnneededNetwork(oldNetwork); 4761 } else { 4762 // Put the network in the background. 4763 updateCapabilities(oldNetwork.getCurrentScore(), oldNetwork, 4764 oldNetwork.networkCapabilities); 4765 } 4766 } 4767 4768 private void makeDefault(NetworkAgentInfo newNetwork) { 4769 if (DBG) log("Switching to new default network: " + newNetwork); 4770 setupDataActivityTracking(newNetwork); 4771 try { 4772 mNetd.setDefaultNetId(newNetwork.network.netId); 4773 } catch (Exception e) { 4774 loge("Exception setting default network :" + e); 4775 } 4776 notifyLockdownVpn(newNetwork); 4777 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4778 updateTcpBufferSizes(newNetwork); 4779 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4780 } 4781 4782 private void processListenRequests(NetworkAgentInfo nai, boolean capabilitiesChanged) { 4783 // For consistency with previous behaviour, send onLost callbacks before onAvailable. 4784 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4785 NetworkRequest nr = nri.request; 4786 if (!nr.isListen()) continue; 4787 if (nai.isSatisfyingRequest(nr.requestId) && !nai.satisfies(nr)) { 4788 nai.removeRequest(nri.request.requestId); 4789 callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_LOST, 0); 4790 } 4791 } 4792 4793 if (capabilitiesChanged) { 4794 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4795 } 4796 4797 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4798 NetworkRequest nr = nri.request; 4799 if (!nr.isListen()) continue; 4800 if (nai.satisfies(nr) && !nai.isSatisfyingRequest(nr.requestId)) { 4801 nai.addRequest(nr); 4802 notifyNetworkCallback(nai, nri); 4803 } 4804 } 4805 } 4806 4807 // Handles a network appearing or improving its score. 4808 // 4809 // - Evaluates all current NetworkRequests that can be 4810 // satisfied by newNetwork, and reassigns to newNetwork 4811 // any such requests for which newNetwork is the best. 4812 // 4813 // - Lingers any validated Networks that as a result are no longer 4814 // needed. A network is needed if it is the best network for 4815 // one or more NetworkRequests, or if it is a VPN. 4816 // 4817 // - Tears down newNetwork if it just became validated 4818 // but turns out to be unneeded. 4819 // 4820 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4821 // networks that have no chance (i.e. even if validated) 4822 // of becoming the highest scoring network. 4823 // 4824 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4825 // it does not remove NetworkRequests that other Networks could better satisfy. 4826 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4827 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4828 // as it performs better by a factor of the number of Networks. 4829 // 4830 // @param newNetwork is the network to be matched against NetworkRequests. 4831 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4832 // performed to tear down unvalidated networks that have no chance (i.e. even if 4833 // validated) of becoming the highest scoring network. 4834 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4835 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 4836 if (!newNetwork.everConnected) return; 4837 boolean keep = newNetwork.isVPN(); 4838 boolean isNewDefault = false; 4839 NetworkAgentInfo oldDefaultNetwork = null; 4840 4841 final boolean wasBackgroundNetwork = newNetwork.isBackgroundNetwork(); 4842 final int score = newNetwork.getCurrentScore(); 4843 4844 if (VDBG) log("rematching " + newNetwork.name()); 4845 4846 // Find and migrate to this Network any NetworkRequests for 4847 // which this network is now the best. 4848 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4849 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4850 NetworkCapabilities nc = newNetwork.networkCapabilities; 4851 if (VDBG) log(" network has: " + nc); 4852 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4853 // Process requests in the first pass and listens in the second pass. This allows us to 4854 // change a network's capabilities depending on which requests it has. This is only 4855 // correct if the change in capabilities doesn't affect whether the network satisfies 4856 // requests or not, and doesn't affect the network's score. 4857 if (nri.request.isListen()) continue; 4858 4859 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4860 final boolean satisfies = newNetwork.satisfies(nri.request); 4861 if (newNetwork == currentNetwork && satisfies) { 4862 if (VDBG) { 4863 log("Network " + newNetwork.name() + " was already satisfying" + 4864 " request " + nri.request.requestId + ". No change."); 4865 } 4866 keep = true; 4867 continue; 4868 } 4869 4870 // check if it satisfies the NetworkCapabilities 4871 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4872 if (satisfies) { 4873 // next check if it's better than any current network we're using for 4874 // this request 4875 if (VDBG) { 4876 log("currentScore = " + 4877 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4878 ", newScore = " + score); 4879 } 4880 if (currentNetwork == null || currentNetwork.getCurrentScore() < score) { 4881 if (VDBG) log("rematch for " + newNetwork.name()); 4882 if (currentNetwork != null) { 4883 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4884 currentNetwork.removeRequest(nri.request.requestId); 4885 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 4886 affectedNetworks.add(currentNetwork); 4887 } else { 4888 if (VDBG) log(" accepting network in place of null"); 4889 } 4890 newNetwork.unlingerRequest(nri.request); 4891 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4892 if (!newNetwork.addRequest(nri.request)) { 4893 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4894 } 4895 addedRequests.add(nri); 4896 keep = true; 4897 // Tell NetworkFactories about the new score, so they can stop 4898 // trying to connect if they know they cannot match it. 4899 // TODO - this could get expensive if we have alot of requests for this 4900 // network. Think about if there is a way to reduce this. Push 4901 // netid->request mapping to each factory? 4902 sendUpdatedScoreToFactories(nri.request, score); 4903 if (isDefaultRequest(nri)) { 4904 isNewDefault = true; 4905 oldDefaultNetwork = currentNetwork; 4906 if (currentNetwork != null) { 4907 mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork); 4908 } 4909 } 4910 } 4911 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 4912 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4913 // mark it as no longer satisfying "nri". Because networks are processed by 4914 // rematchAllNetworksAndRequests() in descending score order, "currentNetwork" will 4915 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4916 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4917 // This means this code doesn't have to handle the case where "currentNetwork" no 4918 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4919 if (DBG) { 4920 log("Network " + newNetwork.name() + " stopped satisfying" + 4921 " request " + nri.request.requestId); 4922 } 4923 newNetwork.removeRequest(nri.request.requestId); 4924 if (currentNetwork == newNetwork) { 4925 mNetworkForRequestId.remove(nri.request.requestId); 4926 sendUpdatedScoreToFactories(nri.request, 0); 4927 } else { 4928 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4929 newNetwork.name() + 4930 " without updating mNetworkForRequestId or factories!"); 4931 } 4932 // TODO: Technically, sending CALLBACK_LOST here is 4933 // incorrect if there is a replacement network currently 4934 // connected that can satisfy nri, which is a request 4935 // (not a listen). However, the only capability that can both 4936 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4937 // so this code is only incorrect for a network that loses 4938 // the TRUSTED capability, which is a rare case. 4939 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 4940 } 4941 } 4942 if (isNewDefault) { 4943 // Notify system services that this network is up. 4944 makeDefault(newNetwork); 4945 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 4946 logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); 4947 synchronized (ConnectivityService.this) { 4948 // have a new default network, release the transition wakelock in 4949 // a second if it's held. The second pause is to allow apps 4950 // to reconnect over the new network 4951 if (mNetTransitionWakeLock.isHeld()) { 4952 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4953 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4954 mNetTransitionWakeLockSerialNumber, 0), 4955 1000); 4956 } 4957 } 4958 } 4959 4960 if (!newNetwork.networkCapabilities.equalRequestableCapabilities(nc)) { 4961 Slog.wtf(TAG, String.format( 4962 "BUG: %s changed requestable capabilities during rematch: %s -> %s", 4963 nc, newNetwork.networkCapabilities)); 4964 } 4965 if (newNetwork.getCurrentScore() != score) { 4966 Slog.wtf(TAG, String.format( 4967 "BUG: %s changed score during rematch: %d -> %d", 4968 score, newNetwork.getCurrentScore())); 4969 } 4970 4971 // Second pass: process all listens. 4972 if (wasBackgroundNetwork != newNetwork.isBackgroundNetwork()) { 4973 // If the network went from background to foreground or vice versa, we need to update 4974 // its foreground state. It is safe to do this after rematching the requests because 4975 // NET_CAPABILITY_FOREGROUND does not affect requests, as is not a requestable 4976 // capability and does not affect the network's score (see the Slog.wtf call above). 4977 updateCapabilities(score, newNetwork, newNetwork.networkCapabilities); 4978 } else { 4979 processListenRequests(newNetwork, false); 4980 } 4981 4982 // do this after the default net is switched, but 4983 // before LegacyTypeTracker sends legacy broadcasts 4984 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4985 4986 // Linger any networks that are no longer needed. This should be done after sending the 4987 // available callback for newNetwork. 4988 for (NetworkAgentInfo nai : affectedNetworks) { 4989 updateLingerState(nai, now); 4990 } 4991 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 4992 // does not need to be done in any particular order. 4993 updateLingerState(newNetwork, now); 4994 4995 if (isNewDefault) { 4996 // Maintain the illusion: since the legacy API only 4997 // understands one network at a time, we must pretend 4998 // that the current default network disconnected before 4999 // the new one connected. 5000 if (oldDefaultNetwork != null) { 5001 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 5002 oldDefaultNetwork, true); 5003 } 5004 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 5005 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 5006 notifyLockdownVpn(newNetwork); 5007 } 5008 5009 if (keep) { 5010 // Notify battery stats service about this network, both the normal 5011 // interface and any stacked links. 5012 // TODO: Avoid redoing this; this must only be done once when a network comes online. 5013 try { 5014 final IBatteryStats bs = BatteryStatsService.getService(); 5015 final int type = newNetwork.networkInfo.getType(); 5016 5017 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 5018 bs.noteNetworkInterfaceType(baseIface, type); 5019 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 5020 final String stackedIface = stacked.getInterfaceName(); 5021 bs.noteNetworkInterfaceType(stackedIface, type); 5022 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 5023 } 5024 } catch (RemoteException ignored) { 5025 } 5026 5027 // This has to happen after the notifyNetworkCallbacks as that tickles each 5028 // ConnectivityManager instance so that legacy requests correctly bind dns 5029 // requests to this network. The legacy users are listening for this bcast 5030 // and will generally do a dns request so they can ensureRouteToHost and if 5031 // they do that before the callbacks happen they'll use the default network. 5032 // 5033 // TODO: Is there still a race here? We send the broadcast 5034 // after sending the callback, but if the app can receive the 5035 // broadcast before the callback, it might still break. 5036 // 5037 // This *does* introduce a race where if the user uses the new api 5038 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 5039 // they may get old info. Reverse this after the old startUsing api is removed. 5040 // This is on top of the multiple intent sequencing referenced in the todo above. 5041 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 5042 NetworkRequest nr = newNetwork.requestAt(i); 5043 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 5044 // legacy type tracker filters out repeat adds 5045 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 5046 } 5047 } 5048 5049 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 5050 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 5051 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 5052 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 5053 if (newNetwork.isVPN()) { 5054 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 5055 } 5056 } 5057 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 5058 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 5059 if (unneeded(nai, UnneededFor.TEARDOWN)) { 5060 if (nai.getLingerExpiry() > 0) { 5061 // This network has active linger timers and no requests, but is not 5062 // lingering. Linger it. 5063 // 5064 // One way (the only way?) this can happen if this network is unvalidated 5065 // and became unneeded due to another network improving its score to the 5066 // point where this network will no longer be able to satisfy any requests 5067 // even if it validates. 5068 updateLingerState(nai, now); 5069 } else { 5070 if (DBG) log("Reaping " + nai.name()); 5071 teardownUnneededNetwork(nai); 5072 } 5073 } 5074 } 5075 } 5076 } 5077 5078 /** 5079 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 5080 * being disconnected. 5081 * @param changed If only one Network's score or capabilities have been modified since the last 5082 * time this function was called, pass this Network in this argument, otherwise pass 5083 * null. 5084 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 5085 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 5086 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 5087 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 5088 * network's score. 5089 */ 5090 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 5091 // TODO: This may get slow. The "changed" parameter is provided for future optimization 5092 // to avoid the slowness. It is not simply enough to process just "changed", for 5093 // example in the case where "changed"'s score decreases and another network should begin 5094 // satifying a NetworkRequest that "changed" currently satisfies. 5095 5096 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 5097 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 5098 // rematchNetworkAndRequests() handles. 5099 final long now = SystemClock.elapsedRealtime(); 5100 if (changed != null && oldScore < changed.getCurrentScore()) { 5101 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 5102 } else { 5103 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 5104 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 5105 // Rematch higher scoring networks first to prevent requests first matching a lower 5106 // scoring network and then a higher scoring network, which could produce multiple 5107 // callbacks and inadvertently unlinger networks. 5108 Arrays.sort(nais); 5109 for (NetworkAgentInfo nai : nais) { 5110 rematchNetworkAndRequests(nai, 5111 // Only reap the last time through the loop. Reaping before all rematching 5112 // is complete could incorrectly teardown a network that hasn't yet been 5113 // rematched. 5114 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 5115 : ReapUnvalidatedNetworks.REAP, 5116 now); 5117 } 5118 } 5119 } 5120 5121 private void updateInetCondition(NetworkAgentInfo nai) { 5122 // Don't bother updating until we've graduated to validated at least once. 5123 if (!nai.everValidated) return; 5124 // For now only update icons for default connection. 5125 // TODO: Update WiFi and cellular icons separately. b/17237507 5126 if (!isDefaultNetwork(nai)) return; 5127 5128 int newInetCondition = nai.lastValidated ? 100 : 0; 5129 // Don't repeat publish. 5130 if (newInetCondition == mDefaultInetConditionPublished) return; 5131 5132 mDefaultInetConditionPublished = newInetCondition; 5133 sendInetConditionBroadcast(nai.networkInfo); 5134 } 5135 5136 private void notifyLockdownVpn(NetworkAgentInfo nai) { 5137 if (mLockdownTracker != null) { 5138 if (nai != null && nai.isVPN()) { 5139 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 5140 } else { 5141 mLockdownTracker.onNetworkInfoChanged(); 5142 } 5143 } 5144 } 5145 5146 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 5147 NetworkInfo.State state = newInfo.getState(); 5148 NetworkInfo oldInfo = null; 5149 final int oldScore = networkAgent.getCurrentScore(); 5150 synchronized (networkAgent) { 5151 oldInfo = networkAgent.networkInfo; 5152 networkAgent.networkInfo = newInfo; 5153 } 5154 notifyLockdownVpn(networkAgent); 5155 5156 if (oldInfo != null && oldInfo.getState() == state) { 5157 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 5158 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 5159 notifyIfacesChangedForNetworkStats(); 5160 } else if (VDBG) log("ignoring duplicate network state non-change"); 5161 // In either case, no further work should be needed. 5162 return; 5163 } 5164 if (DBG) { 5165 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 5166 (oldInfo == null ? "null" : oldInfo.getState()) + 5167 " to " + state); 5168 } 5169 5170 if (!networkAgent.created 5171 && (state == NetworkInfo.State.CONNECTED 5172 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 5173 5174 // A network that has just connected has zero requests and is thus a foreground network. 5175 networkAgent.networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); 5176 5177 try { 5178 // This should never fail. Specifying an already in use NetID will cause failure. 5179 if (networkAgent.isVPN()) { 5180 mNetd.createVirtualNetwork(networkAgent.network.netId, 5181 !networkAgent.linkProperties.getDnsServers().isEmpty(), 5182 (networkAgent.networkMisc == null || 5183 !networkAgent.networkMisc.allowBypass)); 5184 } else { 5185 mNetd.createPhysicalNetwork(networkAgent.network.netId, 5186 networkAgent.networkCapabilities.hasCapability( 5187 NET_CAPABILITY_NOT_RESTRICTED) ? 5188 null : NetworkManagementService.PERMISSION_SYSTEM); 5189 } 5190 } catch (Exception e) { 5191 loge("Error creating network " + networkAgent.network.netId + ": " 5192 + e.getMessage()); 5193 return; 5194 } 5195 networkAgent.created = true; 5196 } 5197 5198 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 5199 networkAgent.everConnected = true; 5200 5201 updateLinkProperties(networkAgent, null); 5202 notifyIfacesChangedForNetworkStats(); 5203 5204 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 5205 scheduleUnvalidatedPrompt(networkAgent); 5206 5207 if (networkAgent.isVPN()) { 5208 // Temporarily disable the default proxy (not global). 5209 synchronized (mProxyLock) { 5210 if (!mDefaultProxyDisabled) { 5211 mDefaultProxyDisabled = true; 5212 if (mGlobalProxy == null && mDefaultProxy != null) { 5213 sendProxyBroadcast(null); 5214 } 5215 } 5216 } 5217 // TODO: support proxy per network. 5218 } 5219 5220 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5221 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5222 // capabilities, so it only needs to be done once on initial connect, not every time the 5223 // network's capabilities change. Note that we do this before rematching the network, 5224 // so we could decide to tear it down immediately afterwards. That's fine though - on 5225 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5226 // doing. 5227 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5228 5229 // Consider network even though it is not yet validated. 5230 final long now = SystemClock.elapsedRealtime(); 5231 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5232 5233 // This has to happen after matching the requests, because callbacks are just requests. 5234 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5235 } else if (state == NetworkInfo.State.DISCONNECTED) { 5236 networkAgent.asyncChannel.disconnect(); 5237 if (networkAgent.isVPN()) { 5238 synchronized (mProxyLock) { 5239 if (mDefaultProxyDisabled) { 5240 mDefaultProxyDisabled = false; 5241 if (mGlobalProxy == null && mDefaultProxy != null) { 5242 sendProxyBroadcast(mDefaultProxy); 5243 } 5244 } 5245 } 5246 } 5247 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5248 state == NetworkInfo.State.SUSPENDED) { 5249 // going into or coming out of SUSPEND: rescore and notify 5250 if (networkAgent.getCurrentScore() != oldScore) { 5251 rematchAllNetworksAndRequests(networkAgent, oldScore); 5252 } 5253 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5254 ConnectivityManager.CALLBACK_SUSPENDED : 5255 ConnectivityManager.CALLBACK_RESUMED)); 5256 mLegacyTypeTracker.update(networkAgent); 5257 } 5258 } 5259 5260 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5261 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5262 if (score < 0) { 5263 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5264 "). Bumping score to min of 0"); 5265 score = 0; 5266 } 5267 5268 final int oldScore = nai.getCurrentScore(); 5269 nai.setCurrentScore(score); 5270 5271 rematchAllNetworksAndRequests(nai, oldScore); 5272 5273 sendUpdatedScoreToFactories(nai); 5274 } 5275 5276 // notify only this one new request of the current state 5277 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5278 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 5279 if (nri.mPendingIntent == null) { 5280 callCallbackForRequest(nri, nai, notifyType, 0); 5281 } else { 5282 sendPendingIntentForRequest(nri, nai, notifyType); 5283 } 5284 } 5285 5286 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5287 // The NetworkInfo we actually send out has no bearing on the real 5288 // state of affairs. For example, if the default connection is mobile, 5289 // and a request for HIPRI has just gone away, we need to pretend that 5290 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5291 // the state to DISCONNECTED, even though the network is of type MOBILE 5292 // and is still connected. 5293 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5294 info.setType(type); 5295 if (state != DetailedState.DISCONNECTED) { 5296 info.setDetailedState(state, null, info.getExtraInfo()); 5297 sendConnectedBroadcast(info); 5298 } else { 5299 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5300 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5301 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5302 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5303 if (info.isFailover()) { 5304 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5305 nai.networkInfo.setFailover(false); 5306 } 5307 if (info.getReason() != null) { 5308 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5309 } 5310 if (info.getExtraInfo() != null) { 5311 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5312 } 5313 NetworkAgentInfo newDefaultAgent = null; 5314 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5315 newDefaultAgent = getDefaultNetwork(); 5316 if (newDefaultAgent != null) { 5317 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5318 newDefaultAgent.networkInfo); 5319 } else { 5320 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5321 } 5322 } 5323 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5324 mDefaultInetConditionPublished); 5325 sendStickyBroadcast(intent); 5326 if (newDefaultAgent != null) { 5327 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5328 } 5329 } 5330 } 5331 5332 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5333 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5334 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5335 NetworkRequest nr = networkAgent.requestAt(i); 5336 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5337 if (VDBG) log(" sending notification for " + nr); 5338 // TODO: if we're in the middle of a rematch, can we send a CAP_CHANGED callback for 5339 // a network that no longer satisfies the listen? 5340 if (nri.mPendingIntent == null) { 5341 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5342 } else { 5343 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5344 } 5345 } 5346 } 5347 5348 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5349 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5350 } 5351 5352 private String notifyTypeToName(int notifyType) { 5353 switch (notifyType) { 5354 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5355 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5356 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5357 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5358 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5359 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5360 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5361 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5362 } 5363 return "UNKNOWN"; 5364 } 5365 5366 /** 5367 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5368 * properties tracked by NetworkStatsService on an active iface has changed. 5369 */ 5370 private void notifyIfacesChangedForNetworkStats() { 5371 try { 5372 mStatsService.forceUpdateIfaces(); 5373 } catch (Exception ignored) { 5374 } 5375 } 5376 5377 @Override 5378 public boolean addVpnAddress(String address, int prefixLength) { 5379 throwIfLockdownEnabled(); 5380 int user = UserHandle.getUserId(Binder.getCallingUid()); 5381 synchronized (mVpns) { 5382 return mVpns.get(user).addAddress(address, prefixLength); 5383 } 5384 } 5385 5386 @Override 5387 public boolean removeVpnAddress(String address, int prefixLength) { 5388 throwIfLockdownEnabled(); 5389 int user = UserHandle.getUserId(Binder.getCallingUid()); 5390 synchronized (mVpns) { 5391 return mVpns.get(user).removeAddress(address, prefixLength); 5392 } 5393 } 5394 5395 @Override 5396 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5397 throwIfLockdownEnabled(); 5398 int user = UserHandle.getUserId(Binder.getCallingUid()); 5399 boolean success; 5400 synchronized (mVpns) { 5401 success = mVpns.get(user).setUnderlyingNetworks(networks); 5402 } 5403 if (success) { 5404 notifyIfacesChangedForNetworkStats(); 5405 } 5406 return success; 5407 } 5408 5409 @Override 5410 public String getCaptivePortalServerUrl() { 5411 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5412 } 5413 5414 @Override 5415 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5416 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5417 enforceKeepalivePermission(); 5418 mKeepaliveTracker.startNattKeepalive( 5419 getNetworkAgentInfoForNetwork(network), 5420 intervalSeconds, messenger, binder, 5421 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5422 } 5423 5424 @Override 5425 public void stopKeepalive(Network network, int slot) { 5426 mHandler.sendMessage(mHandler.obtainMessage( 5427 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5428 } 5429 5430 @Override 5431 public void factoryReset() { 5432 enforceConnectivityInternalPermission(); 5433 5434 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5435 return; 5436 } 5437 5438 final int userId = UserHandle.getCallingUserId(); 5439 5440 // Turn airplane mode off 5441 setAirplaneMode(false); 5442 5443 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5444 // Untether 5445 for (String tether : getTetheredIfaces()) { 5446 untether(tether); 5447 } 5448 } 5449 5450 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5451 // Remove always-on package 5452 synchronized (mVpns) { 5453 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5454 if (alwaysOnPackage != null) { 5455 setAlwaysOnVpnPackage(userId, null, false); 5456 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5457 } 5458 } 5459 5460 // Turn VPN off 5461 VpnConfig vpnConfig = getVpnConfig(userId); 5462 if (vpnConfig != null) { 5463 if (vpnConfig.legacy) { 5464 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5465 } else { 5466 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5467 // in the future without user intervention. 5468 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5469 5470 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5471 } 5472 } 5473 } 5474 5475 Settings.Global.putString(mContext.getContentResolver(), 5476 Settings.Global.NETWORK_AVOID_BAD_WIFI, null); 5477 } 5478 5479 @VisibleForTesting 5480 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5481 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5482 return new NetworkMonitor(context, handler, nai, defaultRequest); 5483 } 5484 5485 @VisibleForTesting 5486 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5487 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5488 } 5489 5490 private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5491 int newNetid = NETID_UNSET; 5492 int prevNetid = NETID_UNSET; 5493 int[] transports = new int[0]; 5494 boolean hadIPv4 = false; 5495 boolean hadIPv6 = false; 5496 5497 if (newNai != null) { 5498 newNetid = newNai.network.netId; 5499 transports = newNai.networkCapabilities.getTransportTypes(); 5500 } 5501 if (prevNai != null) { 5502 prevNetid = prevNai.network.netId; 5503 final LinkProperties lp = prevNai.linkProperties; 5504 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5505 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5506 } 5507 5508 mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); 5509 } 5510 5511 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5512 mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); 5513 } 5514} 5515