ConnectivityService.java revision f4a45f4c330fb4035ceb4878e18a2f7c0c772ab2
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 31import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 32import static android.net.NetworkPolicyManager.RULE_ALLOW_METERED; 33import static android.net.NetworkPolicyManager.RULE_NONE; 34import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 35import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 36import static android.net.NetworkPolicyManager.RULE_TEMPORARY_ALLOW_METERED; 37import static android.net.NetworkPolicyManager.uidRulesToString; 38 39import android.annotation.Nullable; 40import android.app.BroadcastOptions; 41import android.app.Notification; 42import android.app.NotificationManager; 43import android.app.PendingIntent; 44import android.content.BroadcastReceiver; 45import android.content.ContentResolver; 46import android.content.Context; 47import android.content.Intent; 48import android.content.IntentFilter; 49import android.content.pm.PackageManager; 50import android.content.res.Configuration; 51import android.content.res.Resources; 52import android.database.ContentObserver; 53import android.net.ConnectivityManager; 54import android.net.ConnectivityManager.PacketKeepalive; 55import android.net.IConnectivityManager; 56import android.net.INetworkManagementEventObserver; 57import android.net.INetworkPolicyListener; 58import android.net.INetworkPolicyManager; 59import android.net.INetworkStatsService; 60import android.net.LinkProperties; 61import android.net.LinkProperties.CompareResult; 62import android.net.Network; 63import android.net.NetworkAgent; 64import android.net.NetworkCapabilities; 65import android.net.NetworkConfig; 66import android.net.NetworkInfo; 67import android.net.NetworkInfo.DetailedState; 68import android.net.NetworkMisc; 69import android.net.NetworkQuotaInfo; 70import android.net.NetworkRequest; 71import android.net.NetworkState; 72import android.net.NetworkUtils; 73import android.net.Proxy; 74import android.net.ProxyInfo; 75import android.net.RouteInfo; 76import android.net.UidRange; 77import android.net.Uri; 78import android.net.metrics.DefaultNetworkEvent; 79import android.net.metrics.IpConnectivityLog; 80import android.net.metrics.NetworkEvent; 81import android.os.Binder; 82import android.os.Build; 83import android.os.Bundle; 84import android.os.FileUtils; 85import android.os.Handler; 86import android.os.HandlerThread; 87import android.os.IBinder; 88import android.os.INetworkManagementService; 89import android.os.Looper; 90import android.os.Message; 91import android.os.Messenger; 92import android.os.ParcelFileDescriptor; 93import android.os.PowerManager; 94import android.os.Process; 95import android.os.RemoteException; 96import android.os.ResultReceiver; 97import android.os.SystemClock; 98import android.os.SystemProperties; 99import android.os.UserHandle; 100import android.os.UserManager; 101import android.provider.Settings; 102import android.security.Credentials; 103import android.security.KeyStore; 104import android.telephony.TelephonyManager; 105import android.text.TextUtils; 106import android.util.ArraySet; 107import android.util.LocalLog; 108import android.util.LocalLog.ReadOnlyLocalLog; 109import android.util.Log; 110import android.util.Pair; 111import android.util.Slog; 112import android.util.SparseArray; 113import android.util.SparseBooleanArray; 114import android.util.SparseIntArray; 115import android.util.Xml; 116 117import com.android.internal.R; 118import com.android.internal.annotations.GuardedBy; 119import com.android.internal.annotations.VisibleForTesting; 120import com.android.internal.app.IBatteryStats; 121import com.android.internal.net.LegacyVpnInfo; 122import com.android.internal.net.NetworkStatsFactory; 123import com.android.internal.net.VpnConfig; 124import com.android.internal.net.VpnInfo; 125import com.android.internal.net.VpnProfile; 126import com.android.internal.util.AsyncChannel; 127import com.android.internal.util.IndentingPrintWriter; 128import com.android.internal.util.MessageUtils; 129import com.android.internal.util.WakeupMessage; 130import com.android.internal.util.XmlUtils; 131import com.android.server.am.BatteryStatsService; 132import com.android.server.connectivity.DataConnectionStats; 133import com.android.server.connectivity.KeepaliveTracker; 134import com.android.server.connectivity.Nat464Xlat; 135import com.android.server.connectivity.NetworkAgentInfo; 136import com.android.server.connectivity.NetworkDiagnostics; 137import com.android.server.connectivity.NetworkMonitor; 138import com.android.server.connectivity.PacManager; 139import com.android.server.connectivity.PermissionMonitor; 140import com.android.server.connectivity.Tethering; 141import com.android.server.connectivity.Vpn; 142import com.android.server.net.BaseNetworkObserver; 143import com.android.server.net.LockdownVpnTracker; 144 145import com.google.android.collect.Lists; 146 147import org.xmlpull.v1.XmlPullParser; 148import org.xmlpull.v1.XmlPullParserException; 149 150import java.io.File; 151import java.io.FileDescriptor; 152import java.io.FileNotFoundException; 153import java.io.FileReader; 154import java.io.IOException; 155import java.io.PrintWriter; 156import java.net.Inet4Address; 157import java.net.InetAddress; 158import java.net.UnknownHostException; 159import java.util.ArrayDeque; 160import java.util.ArrayList; 161import java.util.Arrays; 162import java.util.Collection; 163import java.util.HashMap; 164import java.util.HashSet; 165import java.util.List; 166import java.util.Map; 167import java.util.Objects; 168import java.util.SortedSet; 169import java.util.TreeSet; 170 171/** 172 * @hide 173 */ 174public class ConnectivityService extends IConnectivityManager.Stub 175 implements PendingIntent.OnFinished { 176 private static final String TAG = ConnectivityService.class.getSimpleName(); 177 178 private static final boolean DBG = true; 179 private static final boolean VDBG = false; 180 181 private static final boolean LOGD_RULES = false; 182 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 183 184 // TODO: create better separation between radio types and network types 185 186 // how long to wait before switching back to a radio's default network 187 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 188 // system property that can override the above value 189 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 190 "android.telephony.apn-restore"; 191 192 // How long to wait before putting up a "This network doesn't have an Internet connection, 193 // connect anyway?" dialog after the user selects a network that doesn't validate. 194 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 195 196 // Default to 30s linger time-out. Modifiable only for testing. 197 private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; 198 private static final int DEFAULT_LINGER_DELAY_MS = 30_000; 199 @VisibleForTesting 200 protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it. 201 202 // How long to delay to removal of a pending intent based request. 203 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 204 private final int mReleasePendingIntentDelayMs; 205 206 private Tethering mTethering; 207 208 private final PermissionMonitor mPermissionMonitor; 209 210 private KeyStore mKeyStore; 211 212 @GuardedBy("mVpns") 213 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 214 215 private boolean mLockdownEnabled; 216 private LockdownVpnTracker mLockdownTracker; 217 218 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 219 private Object mRulesLock = new Object(); 220 /** Currently active network rules by UID. */ 221 @GuardedBy("mRulesLock") 222 private SparseIntArray mUidRules = new SparseIntArray(); 223 /** Set of ifaces that are costly. */ 224 @GuardedBy("mRulesLock") 225 private ArraySet<String> mMeteredIfaces = new ArraySet<>(); 226 /** Flag indicating if background data is restricted. */ 227 @GuardedBy("mRulesLock") 228 private boolean mRestrictBackground; 229 230 final private Context mContext; 231 private int mNetworkPreference; 232 // 0 is full bad, 100 is full good 233 private int mDefaultInetConditionPublished = 0; 234 235 private int mNumDnsEntries; 236 237 private boolean mTestMode; 238 private static ConnectivityService sServiceInstance; 239 240 private INetworkManagementService mNetd; 241 private INetworkStatsService mStatsService; 242 private INetworkPolicyManager mPolicyManager; 243 244 private String mCurrentTcpBufferSizes; 245 246 private static final int ENABLED = 1; 247 private static final int DISABLED = 0; 248 249 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 250 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class, 251 NetworkAgentInfo.class }); 252 253 private enum ReapUnvalidatedNetworks { 254 // Tear down networks that have no chance (e.g. even if validated) of becoming 255 // the highest scoring network satisfying a NetworkRequest. This should be passed when 256 // all networks have been rematched against all NetworkRequests. 257 REAP, 258 // Don't reap networks. This should be passed when some networks have not yet been 259 // rematched against all NetworkRequests. 260 DONT_REAP 261 }; 262 263 /** 264 * used internally to change our mobile data enabled flag 265 */ 266 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 267 268 /** 269 * used internally to clear a wakelock when transitioning 270 * from one net to another. Clear happens when we get a new 271 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 272 * after a timeout if no network is found (typically 1 min). 273 */ 274 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 275 276 /** 277 * used internally to reload global proxy settings 278 */ 279 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 280 281 /** 282 * PAC manager has received new port. 283 */ 284 private static final int EVENT_PROXY_HAS_CHANGED = 16; 285 286 /** 287 * used internally when registering NetworkFactories 288 * obj = NetworkFactoryInfo 289 */ 290 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 291 292 /** 293 * used internally when registering NetworkAgents 294 * obj = Messenger 295 */ 296 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 297 298 /** 299 * used to add a network request 300 * includes a NetworkRequestInfo 301 */ 302 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 303 304 /** 305 * indicates a timeout period is over - check if we had a network yet or not 306 * and if not, call the timeout callback (but leave the request live until they 307 * cancel it. 308 * includes a NetworkRequestInfo 309 */ 310 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 311 312 /** 313 * used to add a network listener - no request 314 * includes a NetworkRequestInfo 315 */ 316 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 317 318 /** 319 * used to remove a network request, either a listener or a real request 320 * arg1 = UID of caller 321 * obj = NetworkRequest 322 */ 323 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 324 325 /** 326 * used internally when registering NetworkFactories 327 * obj = Messenger 328 */ 329 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 330 331 /** 332 * used internally to expire a wakelock when transitioning 333 * from one net to another. Expire happens when we fail to find 334 * a new network (typically after 1 minute) - 335 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 336 * a replacement network. 337 */ 338 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 339 340 /** 341 * Used internally to indicate the system is ready. 342 */ 343 private static final int EVENT_SYSTEM_READY = 25; 344 345 /** 346 * used to add a network request with a pending intent 347 * obj = NetworkRequestInfo 348 */ 349 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 350 351 /** 352 * used to remove a pending intent and its associated network request. 353 * arg1 = UID of caller 354 * obj = PendingIntent 355 */ 356 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 357 358 /** 359 * used to specify whether a network should be used even if unvalidated. 360 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 361 * arg2 = whether to remember this choice in the future (1 or 0) 362 * obj = network 363 */ 364 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 365 366 /** 367 * used to ask the user to confirm a connection to an unvalidated network. 368 * obj = network 369 */ 370 private static final int EVENT_PROMPT_UNVALIDATED = 29; 371 372 /** 373 * used internally to (re)configure mobile data always-on settings. 374 */ 375 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 376 377 /** 378 * used to add a network listener with a pending intent 379 * obj = NetworkRequestInfo 380 */ 381 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 382 383 /** 384 * Indicates a caller has requested to have its callback invoked with 385 * the latest LinkProperties or NetworkCapabilities. 386 * 387 * arg1 = UID of caller 388 * obj = NetworkRequest 389 */ 390 private static final int EVENT_REQUEST_LINKPROPERTIES = 32; 391 private static final int EVENT_REQUEST_NETCAPABILITIES = 33; 392 393 /** Handler thread used for both of the handlers below. */ 394 @VisibleForTesting 395 protected final HandlerThread mHandlerThread; 396 /** Handler used for internal events. */ 397 final private InternalHandler mHandler; 398 /** Handler used for incoming {@link NetworkStateTracker} events. */ 399 final private NetworkStateTrackerHandler mTrackerHandler; 400 401 private boolean mSystemReady; 402 private Intent mInitialBroadcast; 403 404 private PowerManager.WakeLock mNetTransitionWakeLock; 405 private String mNetTransitionWakeLockCausedBy = ""; 406 private int mNetTransitionWakeLockSerialNumber; 407 private int mNetTransitionWakeLockTimeout; 408 private final PowerManager.WakeLock mPendingIntentWakeLock; 409 410 // used in DBG mode to track inet condition reports 411 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 412 private ArrayList mInetLog; 413 414 // track the current default http proxy - tell the world if we get a new one (real change) 415 private volatile ProxyInfo mDefaultProxy = null; 416 private Object mProxyLock = new Object(); 417 private boolean mDefaultProxyDisabled = false; 418 419 // track the global proxy. 420 private ProxyInfo mGlobalProxy = null; 421 422 private PacManager mPacManager = null; 423 424 final private SettingsObserver mSettingsObserver; 425 426 private UserManager mUserManager; 427 428 NetworkConfig[] mNetConfigs; 429 int mNetworksDefined; 430 431 // the set of network types that can only be enabled by system/sig apps 432 List mProtectedNetworks; 433 434 private DataConnectionStats mDataConnectionStats; 435 436 TelephonyManager mTelephonyManager; 437 438 private KeepaliveTracker mKeepaliveTracker; 439 440 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 441 private final static int MIN_NET_ID = 100; // some reserved marks 442 private final static int MAX_NET_ID = 65535; 443 private int mNextNetId = MIN_NET_ID; 444 445 // sequence number of NetworkRequests 446 private int mNextNetworkRequestId = 1; 447 448 // NetworkRequest activity String log entries. 449 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 450 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 451 452 // NetworkInfo blocked and unblocked String log entries 453 // TODO: consider reducing memory usage. Each log line is ~40 2B chars, for a total of ~8kB. 454 private static final int MAX_NETWORK_INFO_LOGS = 100; 455 private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); 456 457 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 458 private static final int MAX_VALIDATION_LOGS = 10; 459 private static class ValidationLog { 460 final Network mNetwork; 461 final String mNetworkExtraInfo; 462 final ReadOnlyLocalLog mLog; 463 464 ValidationLog(Network network, String networkExtraInfo, ReadOnlyLocalLog log) { 465 mNetwork = network; 466 mNetworkExtraInfo = networkExtraInfo; 467 mLog = log; 468 } 469 } 470 private final ArrayDeque<ValidationLog> mValidationLogs = 471 new ArrayDeque<ValidationLog>(MAX_VALIDATION_LOGS); 472 473 private void addValidationLogs(ReadOnlyLocalLog log, Network network, String networkExtraInfo) { 474 synchronized(mValidationLogs) { 475 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 476 mValidationLogs.removeLast(); 477 } 478 mValidationLogs.addFirst(new ValidationLog(network, networkExtraInfo, log)); 479 } 480 } 481 482 private final IpConnectivityLog mMetricsLog = new IpConnectivityLog(); 483 484 /** 485 * Implements support for the legacy "one network per network type" model. 486 * 487 * We used to have a static array of NetworkStateTrackers, one for each 488 * network type, but that doesn't work any more now that we can have, 489 * for example, more that one wifi network. This class stores all the 490 * NetworkAgentInfo objects that support a given type, but the legacy 491 * API will only see the first one. 492 * 493 * It serves two main purposes: 494 * 495 * 1. Provide information about "the network for a given type" (since this 496 * API only supports one). 497 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 498 * the first network for a given type changes, or if the default network 499 * changes. 500 */ 501 private class LegacyTypeTracker { 502 503 private static final boolean DBG = true; 504 private static final boolean VDBG = false; 505 506 /** 507 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 508 * Each list holds references to all NetworkAgentInfos that are used to 509 * satisfy requests for that network type. 510 * 511 * This array is built out at startup such that an unsupported network 512 * doesn't get an ArrayList instance, making this a tristate: 513 * unsupported, supported but not active and active. 514 * 515 * The actual lists are populated when we scan the network types that 516 * are supported on this device. 517 * 518 * Threading model: 519 * - addSupportedType() is only called in the constructor 520 * - add(), update(), remove() are only called from the ConnectivityService handler thread. 521 * They are therefore not thread-safe with respect to each other. 522 * - getNetworkForType() can be called at any time on binder threads. It is synchronized 523 * on mTypeLists to be thread-safe with respect to a concurrent remove call. 524 * - dump is thread-safe with respect to concurrent add and remove calls. 525 */ 526 private final ArrayList<NetworkAgentInfo> mTypeLists[]; 527 528 public LegacyTypeTracker() { 529 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 530 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 531 } 532 533 public void addSupportedType(int type) { 534 if (mTypeLists[type] != null) { 535 throw new IllegalStateException( 536 "legacy list for type " + type + "already initialized"); 537 } 538 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 539 } 540 541 public boolean isTypeSupported(int type) { 542 return isNetworkTypeValid(type) && mTypeLists[type] != null; 543 } 544 545 public NetworkAgentInfo getNetworkForType(int type) { 546 synchronized (mTypeLists) { 547 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 548 return mTypeLists[type].get(0); 549 } 550 } 551 return null; 552 } 553 554 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 555 boolean isDefaultNetwork) { 556 if (DBG) { 557 log("Sending " + state + 558 " broadcast for type " + type + " " + nai.name() + 559 " isDefaultNetwork=" + isDefaultNetwork); 560 } 561 } 562 563 /** Adds the given network to the specified legacy type list. */ 564 public void add(int type, NetworkAgentInfo nai) { 565 if (!isTypeSupported(type)) { 566 return; // Invalid network type. 567 } 568 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 569 570 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 571 if (list.contains(nai)) { 572 return; 573 } 574 synchronized (mTypeLists) { 575 list.add(nai); 576 } 577 578 // Send a broadcast if this is the first network of its type or if it's the default. 579 final boolean isDefaultNetwork = isDefaultNetwork(nai); 580 if ((list.size() == 1) || isDefaultNetwork) { 581 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 582 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 583 } 584 } 585 586 /** Removes the given network from the specified legacy type list. */ 587 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 588 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 589 if (list == null || list.isEmpty()) { 590 return; 591 } 592 final boolean wasFirstNetwork = list.get(0).equals(nai); 593 594 synchronized (mTypeLists) { 595 if (!list.remove(nai)) { 596 return; 597 } 598 } 599 600 final DetailedState state = DetailedState.DISCONNECTED; 601 602 if (wasFirstNetwork || wasDefault) { 603 maybeLogBroadcast(nai, state, type, wasDefault); 604 sendLegacyNetworkBroadcast(nai, state, type); 605 } 606 607 if (!list.isEmpty() && wasFirstNetwork) { 608 if (DBG) log("Other network available for type " + type + 609 ", sending connected broadcast"); 610 final NetworkAgentInfo replacement = list.get(0); 611 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 612 sendLegacyNetworkBroadcast(replacement, state, type); 613 } 614 } 615 616 /** Removes the given network from all legacy type lists. */ 617 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 618 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 619 for (int type = 0; type < mTypeLists.length; type++) { 620 remove(type, nai, wasDefault); 621 } 622 } 623 624 // send out another legacy broadcast - currently only used for suspend/unsuspend 625 // toggle 626 public void update(NetworkAgentInfo nai) { 627 final boolean isDefault = isDefaultNetwork(nai); 628 final DetailedState state = nai.networkInfo.getDetailedState(); 629 for (int type = 0; type < mTypeLists.length; type++) { 630 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 631 final boolean contains = (list != null && list.contains(nai)); 632 final boolean isFirst = contains && (nai == list.get(0)); 633 if (isFirst || contains && isDefault) { 634 maybeLogBroadcast(nai, state, type, isDefault); 635 sendLegacyNetworkBroadcast(nai, state, type); 636 } 637 } 638 } 639 640 private String naiToString(NetworkAgentInfo nai) { 641 String name = (nai != null) ? nai.name() : "null"; 642 String state = (nai.networkInfo != null) ? 643 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 644 "???/???"; 645 return name + " " + state; 646 } 647 648 public void dump(IndentingPrintWriter pw) { 649 pw.println("mLegacyTypeTracker:"); 650 pw.increaseIndent(); 651 pw.print("Supported types:"); 652 for (int type = 0; type < mTypeLists.length; type++) { 653 if (mTypeLists[type] != null) pw.print(" " + type); 654 } 655 pw.println(); 656 pw.println("Current state:"); 657 pw.increaseIndent(); 658 synchronized (mTypeLists) { 659 for (int type = 0; type < mTypeLists.length; type++) { 660 if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; 661 for (NetworkAgentInfo nai : mTypeLists[type]) { 662 pw.println(type + " " + naiToString(nai)); 663 } 664 } 665 } 666 pw.decreaseIndent(); 667 pw.decreaseIndent(); 668 pw.println(); 669 } 670 } 671 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 672 673 @VisibleForTesting 674 protected HandlerThread createHandlerThread() { 675 return new HandlerThread("ConnectivityServiceThread"); 676 } 677 678 public ConnectivityService(Context context, INetworkManagementService netManager, 679 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 680 if (DBG) log("ConnectivityService starting up"); 681 682 mDefaultRequest = createInternetRequestForTransport(-1); 683 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); 684 mNetworkRequests.put(mDefaultRequest, defaultNRI); 685 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 686 687 mDefaultMobileDataRequest = createInternetRequestForTransport( 688 NetworkCapabilities.TRANSPORT_CELLULAR); 689 690 mHandlerThread = createHandlerThread(); 691 mHandlerThread.start(); 692 mHandler = new InternalHandler(mHandlerThread.getLooper()); 693 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 694 695 // setup our unique device name 696 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 697 String id = Settings.Secure.getString(context.getContentResolver(), 698 Settings.Secure.ANDROID_ID); 699 if (id != null && id.length() > 0) { 700 String name = new String("android-").concat(id); 701 SystemProperties.set("net.hostname", name); 702 } 703 } 704 705 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 706 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 707 708 mLingerDelayMs = SystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); 709 710 mContext = checkNotNull(context, "missing Context"); 711 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 712 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 713 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 714 mKeyStore = KeyStore.getInstance(); 715 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 716 717 try { 718 mPolicyManager.setConnectivityListener(mPolicyListener); 719 mRestrictBackground = mPolicyManager.getRestrictBackground(); 720 } catch (RemoteException e) { 721 // ouch, no rules updates means some processes may never get network 722 loge("unable to register INetworkPolicyListener" + e); 723 } 724 725 final PowerManager powerManager = (PowerManager) context.getSystemService( 726 Context.POWER_SERVICE); 727 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 728 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 729 com.android.internal.R.integer.config_networkTransitionTimeout); 730 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 731 732 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 733 734 // TODO: What is the "correct" way to do determine if this is a wifi only device? 735 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 736 log("wifiOnly=" + wifiOnly); 737 String[] naStrings = context.getResources().getStringArray( 738 com.android.internal.R.array.networkAttributes); 739 for (String naString : naStrings) { 740 try { 741 NetworkConfig n = new NetworkConfig(naString); 742 if (VDBG) log("naString=" + naString + " config=" + n); 743 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 744 loge("Error in networkAttributes - ignoring attempt to define type " + 745 n.type); 746 continue; 747 } 748 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 749 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 750 n.type); 751 continue; 752 } 753 if (mNetConfigs[n.type] != null) { 754 loge("Error in networkAttributes - ignoring attempt to redefine type " + 755 n.type); 756 continue; 757 } 758 mLegacyTypeTracker.addSupportedType(n.type); 759 760 mNetConfigs[n.type] = n; 761 mNetworksDefined++; 762 } catch(Exception e) { 763 // ignore it - leave the entry null 764 } 765 } 766 767 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 768 if (mNetConfigs[TYPE_VPN] == null) { 769 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 770 // don't need to add TYPE_VPN to mNetConfigs. 771 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 772 mNetworksDefined++; // used only in the log() statement below. 773 } 774 775 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 776 777 mProtectedNetworks = new ArrayList<Integer>(); 778 int[] protectedNetworks = context.getResources().getIntArray( 779 com.android.internal.R.array.config_protectedNetworks); 780 for (int p : protectedNetworks) { 781 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 782 mProtectedNetworks.add(p); 783 } else { 784 if (DBG) loge("Ignoring protectedNetwork " + p); 785 } 786 } 787 788 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 789 && SystemProperties.get("ro.build.type").equals("eng"); 790 791 mTethering = new Tethering(mContext, mNetd, statsService); 792 793 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 794 795 //set up the listener for user state for creating user VPNs 796 IntentFilter intentFilter = new IntentFilter(); 797 intentFilter.addAction(Intent.ACTION_USER_STARTED); 798 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 799 intentFilter.addAction(Intent.ACTION_USER_ADDED); 800 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 801 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 802 mContext.registerReceiverAsUser( 803 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 804 805 try { 806 mNetd.registerObserver(mTethering); 807 mNetd.registerObserver(mDataActivityObserver); 808 } catch (RemoteException e) { 809 loge("Error registering observer :" + e); 810 } 811 812 if (DBG) { 813 mInetLog = new ArrayList(); 814 } 815 816 mSettingsObserver = new SettingsObserver(mContext, mHandler); 817 registerSettingsCallbacks(); 818 819 mDataConnectionStats = new DataConnectionStats(mContext); 820 mDataConnectionStats.startMonitoring(); 821 822 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 823 824 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 825 826 mKeepaliveTracker = new KeepaliveTracker(mHandler); 827 } 828 829 private NetworkRequest createInternetRequestForTransport(int transportType) { 830 NetworkCapabilities netCap = new NetworkCapabilities(); 831 netCap.addCapability(NET_CAPABILITY_INTERNET); 832 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 833 if (transportType > -1) { 834 netCap.addTransportType(transportType); 835 } 836 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), 837 NetworkRequest.Type.REQUEST); 838 } 839 840 // Used only for testing. 841 // TODO: Delete this and either: 842 // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires 843 // changing ContentResolver to make registerContentObserver non-final). 844 // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it 845 // by subclassing SettingsObserver. 846 @VisibleForTesting 847 void updateMobileDataAlwaysOn() { 848 mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 849 } 850 851 private void handleMobileDataAlwaysOn() { 852 final boolean enable = (Settings.Global.getInt( 853 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 854 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 855 if (enable == isEnabled) { 856 return; // Nothing to do. 857 } 858 859 if (enable) { 860 handleRegisterNetworkRequest(new NetworkRequestInfo( 861 null, mDefaultMobileDataRequest, new Binder())); 862 } else { 863 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 864 } 865 } 866 867 private void registerSettingsCallbacks() { 868 // Watch for global HTTP proxy changes. 869 mSettingsObserver.observe( 870 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 871 EVENT_APPLY_GLOBAL_HTTP_PROXY); 872 873 // Watch for whether or not to keep mobile data always on. 874 mSettingsObserver.observe( 875 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 876 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 877 } 878 879 private synchronized int nextNetworkRequestId() { 880 return mNextNetworkRequestId++; 881 } 882 883 @VisibleForTesting 884 protected int reserveNetId() { 885 synchronized (mNetworkForNetId) { 886 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 887 int netId = mNextNetId; 888 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 889 // Make sure NetID unused. http://b/16815182 890 if (!mNetIdInUse.get(netId)) { 891 mNetIdInUse.put(netId, true); 892 return netId; 893 } 894 } 895 } 896 throw new IllegalStateException("No free netIds"); 897 } 898 899 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 900 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 901 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 902 final NetworkState state; 903 if (nai != null) { 904 state = nai.getNetworkState(); 905 state.networkInfo.setType(networkType); 906 } else { 907 final NetworkInfo info = new NetworkInfo(networkType, 0, 908 getNetworkTypeName(networkType), ""); 909 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 910 info.setIsAvailable(true); 911 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 912 null, null, null); 913 } 914 filterNetworkStateForUid(state, uid, ignoreBlocked); 915 return state; 916 } else { 917 return NetworkState.EMPTY; 918 } 919 } 920 921 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 922 if (network == null) { 923 return null; 924 } 925 synchronized (mNetworkForNetId) { 926 return mNetworkForNetId.get(network.netId); 927 } 928 } 929 930 private Network[] getVpnUnderlyingNetworks(int uid) { 931 if (!mLockdownEnabled) { 932 int user = UserHandle.getUserId(uid); 933 synchronized (mVpns) { 934 Vpn vpn = mVpns.get(user); 935 if (vpn != null && vpn.appliesToUid(uid)) { 936 return vpn.getUnderlyingNetworks(); 937 } 938 } 939 } 940 return null; 941 } 942 943 private NetworkState getUnfilteredActiveNetworkState(int uid) { 944 NetworkAgentInfo nai = getDefaultNetwork(); 945 946 final Network[] networks = getVpnUnderlyingNetworks(uid); 947 if (networks != null) { 948 // getUnderlyingNetworks() returns: 949 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 950 // empty array => the VPN explicitly said "no default network". 951 // non-empty array => the VPN specified one or more default networks; we use the 952 // first one. 953 if (networks.length > 0) { 954 nai = getNetworkAgentInfoForNetwork(networks[0]); 955 } else { 956 nai = null; 957 } 958 } 959 960 if (nai != null) { 961 return nai.getNetworkState(); 962 } else { 963 return NetworkState.EMPTY; 964 } 965 } 966 967 /** 968 * Check if UID should be blocked from using the network with the given LinkProperties. 969 */ 970 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 971 boolean ignoreBlocked) { 972 // Networks aren't blocked when ignoring blocked status 973 if (ignoreBlocked) return false; 974 // Networks are never blocked for system services 975 if (isSystem(uid)) return false; 976 977 final boolean networkMetered; 978 final int uidRules; 979 980 synchronized (mVpns) { 981 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 982 if (vpn != null && vpn.isBlockingUid(uid)) { 983 return true; 984 } 985 } 986 987 final String iface = (lp == null ? "" : lp.getInterfaceName()); 988 synchronized (mRulesLock) { 989 networkMetered = mMeteredIfaces.contains(iface); 990 uidRules = mUidRules.get(uid, RULE_NONE); 991 } 992 993 boolean allowed = true; 994 // Check Data Saver Mode first... 995 if (networkMetered) { 996 if ((uidRules & RULE_REJECT_METERED) != 0) { 997 if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); 998 // Explicitly blacklisted. 999 allowed = false; 1000 } else { 1001 allowed = !mRestrictBackground 1002 || (uidRules & RULE_ALLOW_METERED) != 0 1003 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; 1004 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1005 + " mRestrictBackground=" + mRestrictBackground 1006 + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) 1007 + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" 1008 + ": " + allowed); 1009 } 1010 } 1011 // ...then power restrictions. 1012 if (allowed) { 1013 allowed = (uidRules & RULE_REJECT_ALL) == 0; 1014 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 1015 + " rule is " + uidRulesToString(uidRules) + ": " + allowed); 1016 } 1017 return !allowed; 1018 } 1019 1020 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 1021 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { 1022 return; 1023 } 1024 boolean removed = false; 1025 boolean added = false; 1026 synchronized (mBlockedAppUids) { 1027 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 1028 added = true; 1029 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 1030 removed = true; 1031 } 1032 } 1033 if (added) { 1034 log("Returning blocked NetworkInfo to uid=" + uid); 1035 mNetworkInfoBlockingLogs.log("BLOCKED " + uid); 1036 } else if (removed) { 1037 log("Returning unblocked NetworkInfo to uid=" + uid); 1038 mNetworkInfoBlockingLogs.log("UNBLOCKED " + uid); 1039 } 1040 } 1041 1042 /** 1043 * Apply any relevant filters to {@link NetworkState} for the given UID. For 1044 * example, this may mark the network as {@link DetailedState#BLOCKED} based 1045 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 1046 * {@link NetworkInfo#isMetered()} based on network policies. 1047 */ 1048 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 1049 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 1050 1051 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 1052 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 1053 } 1054 if (mLockdownTracker != null) { 1055 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 1056 } 1057 1058 // TODO: apply metered state closer to NetworkAgentInfo 1059 final long token = Binder.clearCallingIdentity(); 1060 try { 1061 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 1062 } catch (RemoteException e) { 1063 } finally { 1064 Binder.restoreCallingIdentity(token); 1065 } 1066 } 1067 1068 /** 1069 * Return NetworkInfo for the active (i.e., connected) network interface. 1070 * It is assumed that at most one network is active at a time. If more 1071 * than one is active, it is indeterminate which will be returned. 1072 * @return the info for the active network, or {@code null} if none is 1073 * active 1074 */ 1075 @Override 1076 public NetworkInfo getActiveNetworkInfo() { 1077 enforceAccessPermission(); 1078 final int uid = Binder.getCallingUid(); 1079 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1080 filterNetworkStateForUid(state, uid, false); 1081 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1082 return state.networkInfo; 1083 } 1084 1085 @Override 1086 public Network getActiveNetwork() { 1087 enforceAccessPermission(); 1088 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1089 } 1090 1091 @Override 1092 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1093 enforceConnectivityInternalPermission(); 1094 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1095 } 1096 1097 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1098 final int user = UserHandle.getUserId(uid); 1099 int vpnNetId = NETID_UNSET; 1100 synchronized (mVpns) { 1101 final Vpn vpn = mVpns.get(user); 1102 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1103 } 1104 NetworkAgentInfo nai; 1105 if (vpnNetId != NETID_UNSET) { 1106 synchronized (mNetworkForNetId) { 1107 nai = mNetworkForNetId.get(vpnNetId); 1108 } 1109 if (nai != null) return nai.network; 1110 } 1111 nai = getDefaultNetwork(); 1112 if (nai != null 1113 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1114 nai = null; 1115 } 1116 return nai != null ? nai.network : null; 1117 } 1118 1119 // Public because it's used by mLockdownTracker. 1120 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1121 enforceAccessPermission(); 1122 final int uid = Binder.getCallingUid(); 1123 NetworkState state = getUnfilteredActiveNetworkState(uid); 1124 return state.networkInfo; 1125 } 1126 1127 @Override 1128 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1129 enforceConnectivityInternalPermission(); 1130 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1131 filterNetworkStateForUid(state, uid, ignoreBlocked); 1132 return state.networkInfo; 1133 } 1134 1135 @Override 1136 public NetworkInfo getNetworkInfo(int networkType) { 1137 enforceAccessPermission(); 1138 final int uid = Binder.getCallingUid(); 1139 if (getVpnUnderlyingNetworks(uid) != null) { 1140 // A VPN is active, so we may need to return one of its underlying networks. This 1141 // information is not available in LegacyTypeTracker, so we have to get it from 1142 // getUnfilteredActiveNetworkState. 1143 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1144 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1145 filterNetworkStateForUid(state, uid, false); 1146 return state.networkInfo; 1147 } 1148 } 1149 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1150 return state.networkInfo; 1151 } 1152 1153 @Override 1154 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1155 enforceAccessPermission(); 1156 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1157 if (nai != null) { 1158 final NetworkState state = nai.getNetworkState(); 1159 filterNetworkStateForUid(state, uid, ignoreBlocked); 1160 return state.networkInfo; 1161 } else { 1162 return null; 1163 } 1164 } 1165 1166 @Override 1167 public NetworkInfo[] getAllNetworkInfo() { 1168 enforceAccessPermission(); 1169 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1170 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1171 networkType++) { 1172 NetworkInfo info = getNetworkInfo(networkType); 1173 if (info != null) { 1174 result.add(info); 1175 } 1176 } 1177 return result.toArray(new NetworkInfo[result.size()]); 1178 } 1179 1180 @Override 1181 public Network getNetworkForType(int networkType) { 1182 enforceAccessPermission(); 1183 final int uid = Binder.getCallingUid(); 1184 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1185 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1186 return state.network; 1187 } 1188 return null; 1189 } 1190 1191 @Override 1192 public Network[] getAllNetworks() { 1193 enforceAccessPermission(); 1194 synchronized (mNetworkForNetId) { 1195 final Network[] result = new Network[mNetworkForNetId.size()]; 1196 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1197 result[i] = mNetworkForNetId.valueAt(i).network; 1198 } 1199 return result; 1200 } 1201 } 1202 1203 @Override 1204 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1205 // The basic principle is: if an app's traffic could possibly go over a 1206 // network, without the app doing anything multinetwork-specific, 1207 // (hence, by "default"), then include that network's capabilities in 1208 // the array. 1209 // 1210 // In the normal case, app traffic only goes over the system's default 1211 // network connection, so that's the only network returned. 1212 // 1213 // With a VPN in force, some app traffic may go into the VPN, and thus 1214 // over whatever underlying networks the VPN specifies, while other app 1215 // traffic may go over the system default network (e.g.: a split-tunnel 1216 // VPN, or an app disallowed by the VPN), so the set of networks 1217 // returned includes the VPN's underlying networks and the system 1218 // default. 1219 enforceAccessPermission(); 1220 1221 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1222 1223 NetworkAgentInfo nai = getDefaultNetwork(); 1224 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1225 if (nc != null) { 1226 result.put(nai.network, nc); 1227 } 1228 1229 if (!mLockdownEnabled) { 1230 synchronized (mVpns) { 1231 Vpn vpn = mVpns.get(userId); 1232 if (vpn != null) { 1233 Network[] networks = vpn.getUnderlyingNetworks(); 1234 if (networks != null) { 1235 for (Network network : networks) { 1236 nai = getNetworkAgentInfoForNetwork(network); 1237 nc = getNetworkCapabilitiesInternal(nai); 1238 if (nc != null) { 1239 result.put(network, nc); 1240 } 1241 } 1242 } 1243 } 1244 } 1245 } 1246 1247 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1248 out = result.values().toArray(out); 1249 return out; 1250 } 1251 1252 @Override 1253 public boolean isNetworkSupported(int networkType) { 1254 enforceAccessPermission(); 1255 return mLegacyTypeTracker.isTypeSupported(networkType); 1256 } 1257 1258 /** 1259 * Return LinkProperties for the active (i.e., connected) default 1260 * network interface. It is assumed that at most one default network 1261 * is active at a time. If more than one is active, it is indeterminate 1262 * which will be returned. 1263 * @return the ip properties for the active network, or {@code null} if 1264 * none is active 1265 */ 1266 @Override 1267 public LinkProperties getActiveLinkProperties() { 1268 enforceAccessPermission(); 1269 final int uid = Binder.getCallingUid(); 1270 NetworkState state = getUnfilteredActiveNetworkState(uid); 1271 return state.linkProperties; 1272 } 1273 1274 @Override 1275 public LinkProperties getLinkPropertiesForType(int networkType) { 1276 enforceAccessPermission(); 1277 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1278 if (nai != null) { 1279 synchronized (nai) { 1280 return new LinkProperties(nai.linkProperties); 1281 } 1282 } 1283 return null; 1284 } 1285 1286 // TODO - this should be ALL networks 1287 @Override 1288 public LinkProperties getLinkProperties(Network network) { 1289 enforceAccessPermission(); 1290 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1291 if (nai != null) { 1292 synchronized (nai) { 1293 return new LinkProperties(nai.linkProperties); 1294 } 1295 } 1296 return null; 1297 } 1298 1299 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1300 if (nai != null) { 1301 synchronized (nai) { 1302 if (nai.networkCapabilities != null) { 1303 return new NetworkCapabilities(nai.networkCapabilities); 1304 } 1305 } 1306 } 1307 return null; 1308 } 1309 1310 @Override 1311 public NetworkCapabilities getNetworkCapabilities(Network network) { 1312 enforceAccessPermission(); 1313 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1314 } 1315 1316 @Override 1317 public NetworkState[] getAllNetworkState() { 1318 // Require internal since we're handing out IMSI details 1319 enforceConnectivityInternalPermission(); 1320 1321 final ArrayList<NetworkState> result = Lists.newArrayList(); 1322 for (Network network : getAllNetworks()) { 1323 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1324 if (nai != null) { 1325 result.add(nai.getNetworkState()); 1326 } 1327 } 1328 return result.toArray(new NetworkState[result.size()]); 1329 } 1330 1331 @Override 1332 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1333 enforceAccessPermission(); 1334 final int uid = Binder.getCallingUid(); 1335 final long token = Binder.clearCallingIdentity(); 1336 try { 1337 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1338 if (state.networkInfo != null) { 1339 try { 1340 return mPolicyManager.getNetworkQuotaInfo(state); 1341 } catch (RemoteException e) { 1342 } 1343 } 1344 return null; 1345 } finally { 1346 Binder.restoreCallingIdentity(token); 1347 } 1348 } 1349 1350 @Override 1351 public boolean isActiveNetworkMetered() { 1352 enforceAccessPermission(); 1353 1354 final NetworkInfo info = getActiveNetworkInfo(); 1355 return (info != null) ? info.isMetered() : false; 1356 } 1357 1358 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1359 @Override 1360 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1361 int deviceType = Integer.parseInt(label); 1362 sendDataActivityBroadcast(deviceType, active, tsNanos); 1363 } 1364 }; 1365 1366 /** 1367 * Ensure that a network route exists to deliver traffic to the specified 1368 * host via the specified network interface. 1369 * @param networkType the type of the network over which traffic to the 1370 * specified host is to be routed 1371 * @param hostAddress the IP address of the host to which the route is 1372 * desired 1373 * @return {@code true} on success, {@code false} on failure 1374 */ 1375 @Override 1376 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1377 enforceChangePermission(); 1378 if (mProtectedNetworks.contains(networkType)) { 1379 enforceConnectivityInternalPermission(); 1380 } 1381 1382 InetAddress addr; 1383 try { 1384 addr = InetAddress.getByAddress(hostAddress); 1385 } catch (UnknownHostException e) { 1386 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1387 return false; 1388 } 1389 1390 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1391 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1392 return false; 1393 } 1394 1395 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1396 if (nai == null) { 1397 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1398 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1399 } else { 1400 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1401 } 1402 return false; 1403 } 1404 1405 DetailedState netState; 1406 synchronized (nai) { 1407 netState = nai.networkInfo.getDetailedState(); 1408 } 1409 1410 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1411 if (VDBG) { 1412 log("requestRouteToHostAddress on down network " 1413 + "(" + networkType + ") - dropped" 1414 + " netState=" + netState); 1415 } 1416 return false; 1417 } 1418 1419 final int uid = Binder.getCallingUid(); 1420 final long token = Binder.clearCallingIdentity(); 1421 try { 1422 LinkProperties lp; 1423 int netId; 1424 synchronized (nai) { 1425 lp = nai.linkProperties; 1426 netId = nai.network.netId; 1427 } 1428 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1429 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1430 return ok; 1431 } finally { 1432 Binder.restoreCallingIdentity(token); 1433 } 1434 } 1435 1436 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1437 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1438 if (bestRoute == null) { 1439 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1440 } else { 1441 String iface = bestRoute.getInterface(); 1442 if (bestRoute.getGateway().equals(addr)) { 1443 // if there is no better route, add the implied hostroute for our gateway 1444 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1445 } else { 1446 // if we will connect to this through another route, add a direct route 1447 // to it's gateway 1448 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1449 } 1450 } 1451 if (DBG) log("Adding legacy route " + bestRoute + 1452 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1453 try { 1454 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1455 } catch (Exception e) { 1456 // never crash - catch them all 1457 if (DBG) loge("Exception trying to add a route: " + e); 1458 return false; 1459 } 1460 return true; 1461 } 1462 1463 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1464 @Override 1465 public void onUidRulesChanged(int uid, int uidRules) { 1466 // caller is NPMS, since we only register with them 1467 if (LOGD_RULES) { 1468 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1469 } 1470 1471 synchronized (mRulesLock) { 1472 // skip update when we've already applied rules 1473 final int oldRules = mUidRules.get(uid, RULE_NONE); 1474 if (oldRules == uidRules) return; 1475 1476 if (uidRules == RULE_NONE) { 1477 mUidRules.delete(uid); 1478 } else { 1479 mUidRules.put(uid, uidRules); 1480 } 1481 } 1482 1483 // TODO: notify UID when it has requested targeted updates 1484 } 1485 1486 @Override 1487 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1488 // caller is NPMS, since we only register with them 1489 if (LOGD_RULES) { 1490 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1491 } 1492 1493 synchronized (mRulesLock) { 1494 mMeteredIfaces.clear(); 1495 for (String iface : meteredIfaces) { 1496 mMeteredIfaces.add(iface); 1497 } 1498 } 1499 } 1500 1501 @Override 1502 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1503 // caller is NPMS, since we only register with them 1504 if (LOGD_RULES) { 1505 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1506 } 1507 1508 synchronized (mRulesLock) { 1509 mRestrictBackground = restrictBackground; 1510 } 1511 1512 if (restrictBackground) { 1513 log("onRestrictBackgroundChanged(true): disabling tethering"); 1514 mTethering.untetherAll(); 1515 } 1516 } 1517 1518 @Override 1519 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1520 if (LOGD_RULES) { 1521 // caller is NPMS, since we only register with them 1522 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1523 + whitelisted + ")"); 1524 } 1525 } 1526 @Override 1527 public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { 1528 if (LOGD_RULES) { 1529 // caller is NPMS, since we only register with them 1530 log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" 1531 + blacklisted + ")"); 1532 } 1533 } 1534 }; 1535 1536 /** 1537 * Require that the caller is either in the same user or has appropriate permission to interact 1538 * across users. 1539 * 1540 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1541 */ 1542 private void enforceCrossUserPermission(int userId) { 1543 if (userId == UserHandle.getCallingUserId()) { 1544 // Not a cross-user call. 1545 return; 1546 } 1547 mContext.enforceCallingOrSelfPermission( 1548 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1549 "ConnectivityService"); 1550 } 1551 1552 private void enforceInternetPermission() { 1553 mContext.enforceCallingOrSelfPermission( 1554 android.Manifest.permission.INTERNET, 1555 "ConnectivityService"); 1556 } 1557 1558 private void enforceAccessPermission() { 1559 mContext.enforceCallingOrSelfPermission( 1560 android.Manifest.permission.ACCESS_NETWORK_STATE, 1561 "ConnectivityService"); 1562 } 1563 1564 private void enforceChangePermission() { 1565 ConnectivityManager.enforceChangePermission(mContext); 1566 } 1567 1568 private void enforceTetherAccessPermission() { 1569 mContext.enforceCallingOrSelfPermission( 1570 android.Manifest.permission.ACCESS_NETWORK_STATE, 1571 "ConnectivityService"); 1572 } 1573 1574 private void enforceConnectivityInternalPermission() { 1575 mContext.enforceCallingOrSelfPermission( 1576 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1577 "ConnectivityService"); 1578 } 1579 1580 private void enforceKeepalivePermission() { 1581 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1582 } 1583 1584 // Public because it's used by mLockdownTracker. 1585 public void sendConnectedBroadcast(NetworkInfo info) { 1586 enforceConnectivityInternalPermission(); 1587 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1588 } 1589 1590 private void sendInetConditionBroadcast(NetworkInfo info) { 1591 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1592 } 1593 1594 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1595 if (mLockdownTracker != null) { 1596 info = new NetworkInfo(info); 1597 mLockdownTracker.augmentNetworkInfo(info); 1598 } 1599 1600 Intent intent = new Intent(bcastType); 1601 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1602 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1603 if (info.isFailover()) { 1604 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1605 info.setFailover(false); 1606 } 1607 if (info.getReason() != null) { 1608 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1609 } 1610 if (info.getExtraInfo() != null) { 1611 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1612 info.getExtraInfo()); 1613 } 1614 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1615 return intent; 1616 } 1617 1618 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1619 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1620 } 1621 1622 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1623 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1624 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1625 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1626 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1627 final long ident = Binder.clearCallingIdentity(); 1628 try { 1629 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1630 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1631 } finally { 1632 Binder.restoreCallingIdentity(ident); 1633 } 1634 } 1635 1636 private void sendStickyBroadcast(Intent intent) { 1637 synchronized(this) { 1638 if (!mSystemReady) { 1639 mInitialBroadcast = new Intent(intent); 1640 } 1641 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1642 if (VDBG) { 1643 log("sendStickyBroadcast: action=" + intent.getAction()); 1644 } 1645 1646 Bundle options = null; 1647 final long ident = Binder.clearCallingIdentity(); 1648 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1649 final NetworkInfo ni = intent.getParcelableExtra( 1650 ConnectivityManager.EXTRA_NETWORK_INFO); 1651 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1652 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1653 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1654 } else { 1655 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1656 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1657 options = opts.toBundle(); 1658 } 1659 final IBatteryStats bs = BatteryStatsService.getService(); 1660 try { 1661 bs.noteConnectivityChanged(intent.getIntExtra( 1662 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1663 ni != null ? ni.getState().toString() : "?"); 1664 } catch (RemoteException e) { 1665 } 1666 } 1667 try { 1668 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1669 } finally { 1670 Binder.restoreCallingIdentity(ident); 1671 } 1672 } 1673 } 1674 1675 void systemReady() { 1676 loadGlobalProxy(); 1677 1678 synchronized(this) { 1679 mSystemReady = true; 1680 if (mInitialBroadcast != null) { 1681 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1682 mInitialBroadcast = null; 1683 } 1684 } 1685 // load the global proxy at startup 1686 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1687 1688 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1689 // for user to unlock device too. 1690 updateLockdownVpn(); 1691 1692 // Configure whether mobile data is always on. 1693 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1694 1695 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1696 1697 mPermissionMonitor.startMonitoring(); 1698 } 1699 1700 /** 1701 * Setup data activity tracking for the given network. 1702 * 1703 * Every {@code setupDataActivityTracking} should be paired with a 1704 * {@link #removeDataActivityTracking} for cleanup. 1705 */ 1706 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1707 final String iface = networkAgent.linkProperties.getInterfaceName(); 1708 1709 final int timeout; 1710 int type = ConnectivityManager.TYPE_NONE; 1711 1712 if (networkAgent.networkCapabilities.hasTransport( 1713 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1714 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1715 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1716 10); 1717 type = ConnectivityManager.TYPE_MOBILE; 1718 } else if (networkAgent.networkCapabilities.hasTransport( 1719 NetworkCapabilities.TRANSPORT_WIFI)) { 1720 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1721 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1722 15); 1723 type = ConnectivityManager.TYPE_WIFI; 1724 } else { 1725 // do not track any other networks 1726 timeout = 0; 1727 } 1728 1729 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1730 try { 1731 mNetd.addIdleTimer(iface, timeout, type); 1732 } catch (Exception e) { 1733 // You shall not crash! 1734 loge("Exception in setupDataActivityTracking " + e); 1735 } 1736 } 1737 } 1738 1739 /** 1740 * Remove data activity tracking when network disconnects. 1741 */ 1742 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1743 final String iface = networkAgent.linkProperties.getInterfaceName(); 1744 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1745 1746 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1747 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1748 try { 1749 // the call fails silently if no idletimer setup for this interface 1750 mNetd.removeIdleTimer(iface); 1751 } catch (Exception e) { 1752 loge("Exception in removeDataActivityTracking " + e); 1753 } 1754 } 1755 } 1756 1757 /** 1758 * Reads the network specific MTU size from reources. 1759 * and set it on it's iface. 1760 */ 1761 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1762 final String iface = newLp.getInterfaceName(); 1763 final int mtu = newLp.getMtu(); 1764 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1765 if (VDBG) log("identical MTU - not setting"); 1766 return; 1767 } 1768 1769 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1770 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1771 return; 1772 } 1773 1774 // Cannot set MTU without interface name 1775 if (TextUtils.isEmpty(iface)) { 1776 loge("Setting MTU size with null iface."); 1777 return; 1778 } 1779 1780 try { 1781 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1782 mNetd.setMtu(iface, mtu); 1783 } catch (Exception e) { 1784 Slog.e(TAG, "exception in setMtu()" + e); 1785 } 1786 } 1787 1788 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1789 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1790 1791 // Overridden for testing purposes to avoid writing to SystemProperties. 1792 @VisibleForTesting 1793 protected int getDefaultTcpRwnd() { 1794 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1795 } 1796 1797 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1798 if (isDefaultNetwork(nai) == false) { 1799 return; 1800 } 1801 1802 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1803 String[] values = null; 1804 if (tcpBufferSizes != null) { 1805 values = tcpBufferSizes.split(","); 1806 } 1807 1808 if (values == null || values.length != 6) { 1809 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1810 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1811 values = tcpBufferSizes.split(","); 1812 } 1813 1814 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1815 1816 try { 1817 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1818 1819 final String prefix = "/sys/kernel/ipv4/tcp_"; 1820 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1821 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1822 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1823 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1824 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1825 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1826 mCurrentTcpBufferSizes = tcpBufferSizes; 1827 } catch (IOException e) { 1828 loge("Can't set TCP buffer sizes:" + e); 1829 } 1830 1831 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1832 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1833 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1834 if (rwndValue != 0) { 1835 SystemProperties.set(sysctlKey, rwndValue.toString()); 1836 } 1837 } 1838 1839 private void flushVmDnsCache() { 1840 /* 1841 * Tell the VMs to toss their DNS caches 1842 */ 1843 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1844 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1845 /* 1846 * Connectivity events can happen before boot has completed ... 1847 */ 1848 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1849 final long ident = Binder.clearCallingIdentity(); 1850 try { 1851 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1852 } finally { 1853 Binder.restoreCallingIdentity(ident); 1854 } 1855 } 1856 1857 @Override 1858 public int getRestoreDefaultNetworkDelay(int networkType) { 1859 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1860 NETWORK_RESTORE_DELAY_PROP_NAME); 1861 if(restoreDefaultNetworkDelayStr != null && 1862 restoreDefaultNetworkDelayStr.length() != 0) { 1863 try { 1864 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1865 } catch (NumberFormatException e) { 1866 } 1867 } 1868 // if the system property isn't set, use the value for the apn type 1869 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1870 1871 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1872 (mNetConfigs[networkType] != null)) { 1873 ret = mNetConfigs[networkType].restoreTime; 1874 } 1875 return ret; 1876 } 1877 1878 private boolean argsContain(String[] args, String target) { 1879 for (String arg : args) { 1880 if (arg.equals(target)) return true; 1881 } 1882 return false; 1883 } 1884 1885 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1886 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1887 final long DIAG_TIME_MS = 5000; 1888 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1889 // Start gathering diagnostic information. 1890 netDiags.add(new NetworkDiagnostics( 1891 nai.network, 1892 new LinkProperties(nai.linkProperties), // Must be a copy. 1893 DIAG_TIME_MS)); 1894 } 1895 1896 for (NetworkDiagnostics netDiag : netDiags) { 1897 pw.println(); 1898 netDiag.waitForMeasurements(); 1899 netDiag.dump(pw); 1900 } 1901 } 1902 1903 @Override 1904 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1905 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1906 if (mContext.checkCallingOrSelfPermission( 1907 android.Manifest.permission.DUMP) 1908 != PackageManager.PERMISSION_GRANTED) { 1909 pw.println("Permission Denial: can't dump ConnectivityService " + 1910 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1911 Binder.getCallingUid()); 1912 return; 1913 } 1914 1915 if (argsContain(args, "--diag")) { 1916 dumpNetworkDiagnostics(pw); 1917 return; 1918 } 1919 1920 pw.print("NetworkFactories for:"); 1921 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1922 pw.print(" " + nfi.name); 1923 } 1924 pw.println(); 1925 pw.println(); 1926 1927 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1928 pw.print("Active default network: "); 1929 if (defaultNai == null) { 1930 pw.println("none"); 1931 } else { 1932 pw.println(defaultNai.network.netId); 1933 } 1934 pw.println(); 1935 1936 pw.println("Current Networks:"); 1937 pw.increaseIndent(); 1938 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1939 pw.println(nai.toString()); 1940 pw.increaseIndent(); 1941 pw.println(String.format("Requests: %d request/%d total", 1942 nai.numRequestNetworkRequests(), nai.numNetworkRequests())); 1943 pw.increaseIndent(); 1944 for (int i = 0; i < nai.numNetworkRequests(); i++) { 1945 pw.println(nai.requestAt(i).toString()); 1946 } 1947 pw.decreaseIndent(); 1948 pw.println("Lingered:"); 1949 pw.increaseIndent(); 1950 nai.dumpLingerTimers(pw); 1951 pw.decreaseIndent(); 1952 pw.decreaseIndent(); 1953 } 1954 pw.decreaseIndent(); 1955 pw.println(); 1956 1957 pw.println("Metered Interfaces:"); 1958 pw.increaseIndent(); 1959 for (String value : mMeteredIfaces) { 1960 pw.println(value); 1961 } 1962 pw.decreaseIndent(); 1963 pw.println(); 1964 1965 pw.print("Restrict background: "); 1966 pw.println(mRestrictBackground); 1967 pw.println(); 1968 1969 pw.println("Status for known UIDs:"); 1970 pw.increaseIndent(); 1971 final int size = mUidRules.size(); 1972 for (int i = 0; i < size; i++) { 1973 final int uid = mUidRules.keyAt(i); 1974 pw.print("UID="); 1975 pw.print(uid); 1976 final int uidRules = mUidRules.get(uid, RULE_NONE); 1977 pw.print(" rules="); 1978 pw.print(uidRulesToString(uidRules)); 1979 pw.println(); 1980 } 1981 pw.println(); 1982 pw.decreaseIndent(); 1983 1984 pw.println("Network Requests:"); 1985 pw.increaseIndent(); 1986 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1987 pw.println(nri.toString()); 1988 } 1989 pw.println(); 1990 pw.decreaseIndent(); 1991 1992 mLegacyTypeTracker.dump(pw); 1993 1994 synchronized (this) { 1995 pw.print("mNetTransitionWakeLock: currently " + 1996 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1997 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1998 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1999 } else { 2000 pw.println(", last requested never"); 2001 } 2002 } 2003 2004 pw.println(); 2005 mTethering.dump(fd, pw, args); 2006 2007 pw.println(); 2008 mKeepaliveTracker.dump(pw); 2009 2010 pw.println(); 2011 2012 if (mInetLog != null && mInetLog.size() > 0) { 2013 pw.println(); 2014 pw.println("Inet condition reports:"); 2015 pw.increaseIndent(); 2016 for(int i = 0; i < mInetLog.size(); i++) { 2017 pw.println(mInetLog.get(i)); 2018 } 2019 pw.decreaseIndent(); 2020 } 2021 2022 if (argsContain(args, "--short") == false) { 2023 pw.println(); 2024 synchronized (mValidationLogs) { 2025 pw.println("mValidationLogs (most recent first):"); 2026 for (ValidationLog p : mValidationLogs) { 2027 pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); 2028 pw.increaseIndent(); 2029 p.mLog.dump(fd, pw, args); 2030 pw.decreaseIndent(); 2031 } 2032 } 2033 2034 pw.println(); 2035 pw.println("mNetworkRequestInfoLogs (most recent first):"); 2036 pw.increaseIndent(); 2037 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 2038 pw.decreaseIndent(); 2039 2040 pw.println(); 2041 pw.println("mNetworkInfoBlockingLogs (most recent first):"); 2042 pw.increaseIndent(); 2043 mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); 2044 pw.decreaseIndent(); 2045 } 2046 } 2047 2048 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 2049 if (nai.network == null) return false; 2050 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 2051 if (officialNai != null && officialNai.equals(nai)) return true; 2052 if (officialNai != null || VDBG) { 2053 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 2054 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 2055 " - " + nai); 2056 } 2057 return false; 2058 } 2059 2060 // must be stateless - things change under us. 2061 private class NetworkStateTrackerHandler extends Handler { 2062 public NetworkStateTrackerHandler(Looper looper) { 2063 super(looper); 2064 } 2065 2066 private boolean maybeHandleAsyncChannelMessage(Message msg) { 2067 switch (msg.what) { 2068 default: 2069 return false; 2070 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 2071 handleAsyncChannelHalfConnect(msg); 2072 break; 2073 } 2074 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2075 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2076 if (nai != null) nai.asyncChannel.disconnect(); 2077 break; 2078 } 2079 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2080 handleAsyncChannelDisconnected(msg); 2081 break; 2082 } 2083 } 2084 return true; 2085 } 2086 2087 private void maybeHandleNetworkAgentMessage(Message msg) { 2088 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2089 if (nai == null) { 2090 if (VDBG) { 2091 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 2092 log(String.format("%s from unknown NetworkAgent", what)); 2093 } 2094 return; 2095 } 2096 2097 switch (msg.what) { 2098 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2099 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2100 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2101 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 2102 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2103 } 2104 if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( 2105 networkCapabilities)) { 2106 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 2107 + nai.networkCapabilities + " -> " + networkCapabilities); 2108 } 2109 updateCapabilities(nai, networkCapabilities); 2110 break; 2111 } 2112 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2113 if (VDBG) { 2114 log("Update of LinkProperties for " + nai.name() + 2115 "; created=" + nai.created + 2116 "; everConnected=" + nai.everConnected); 2117 } 2118 LinkProperties oldLp = nai.linkProperties; 2119 synchronized (nai) { 2120 nai.linkProperties = (LinkProperties)msg.obj; 2121 } 2122 if (nai.everConnected) updateLinkProperties(nai, oldLp); 2123 break; 2124 } 2125 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2126 NetworkInfo info = (NetworkInfo) msg.obj; 2127 updateNetworkInfo(nai, info); 2128 break; 2129 } 2130 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2131 Integer score = (Integer) msg.obj; 2132 if (score != null) updateNetworkScore(nai, score.intValue()); 2133 break; 2134 } 2135 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2136 try { 2137 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2138 } catch (Exception e) { 2139 // Never crash! 2140 loge("Exception in addVpnUidRanges: " + e); 2141 } 2142 break; 2143 } 2144 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2145 try { 2146 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2147 } catch (Exception e) { 2148 // Never crash! 2149 loge("Exception in removeVpnUidRanges: " + e); 2150 } 2151 break; 2152 } 2153 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2154 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2155 loge("ERROR: already-connected network explicitly selected."); 2156 } 2157 nai.networkMisc.explicitlySelected = true; 2158 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2159 break; 2160 } 2161 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2162 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2163 break; 2164 } 2165 } 2166 } 2167 2168 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2169 switch (msg.what) { 2170 default: 2171 return false; 2172 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2173 final NetworkAgentInfo nai; 2174 synchronized (mNetworkForNetId) { 2175 nai = mNetworkForNetId.get(msg.arg2); 2176 } 2177 if (nai != null) { 2178 final boolean valid = 2179 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2180 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2181 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2182 if (valid != nai.lastValidated) { 2183 final int oldScore = nai.getCurrentScore(); 2184 nai.lastValidated = valid; 2185 nai.everValidated |= valid; 2186 updateCapabilities(nai, nai.networkCapabilities); 2187 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2188 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2189 } 2190 updateInetCondition(nai); 2191 // Let the NetworkAgent know the state of its network 2192 Bundle redirectUrlBundle = new Bundle(); 2193 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2194 nai.asyncChannel.sendMessage( 2195 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2196 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2197 0, redirectUrlBundle); 2198 } 2199 break; 2200 } 2201 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2202 final int netId = msg.arg2; 2203 final boolean visible = (msg.arg1 != 0); 2204 final NetworkAgentInfo nai; 2205 synchronized (mNetworkForNetId) { 2206 nai = mNetworkForNetId.get(netId); 2207 } 2208 // If captive portal status has changed, update capabilities. 2209 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2210 nai.lastCaptivePortalDetected = visible; 2211 nai.everCaptivePortalDetected |= visible; 2212 updateCapabilities(nai, nai.networkCapabilities); 2213 } 2214 if (!visible) { 2215 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2216 } else { 2217 if (nai == null) { 2218 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2219 break; 2220 } 2221 if (!nai.networkMisc.provisioningNotificationDisabled) { 2222 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2223 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2224 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2225 } 2226 } 2227 break; 2228 } 2229 } 2230 return true; 2231 } 2232 2233 private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { 2234 switch (msg.what) { 2235 default: 2236 return false; 2237 case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { 2238 NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; 2239 if (nai != null && isLiveNetworkAgent(nai, msg.what)) { 2240 handleLingerComplete(nai); 2241 } 2242 break; 2243 } 2244 } 2245 return true; 2246 } 2247 2248 @Override 2249 public void handleMessage(Message msg) { 2250 if (!maybeHandleAsyncChannelMessage(msg) && 2251 !maybeHandleNetworkMonitorMessage(msg) && 2252 !maybeHandleNetworkAgentInfoMessage(msg)) { 2253 maybeHandleNetworkAgentMessage(msg); 2254 } 2255 } 2256 } 2257 2258 private void updateLingerState(NetworkAgentInfo nai, long now) { 2259 // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. 2260 // 2. If the network was lingering and there are now requests, unlinger it. 2261 // 3. If this network is unneeded (which implies it is not lingering), and there is at least 2262 // one lingered request, start lingering. 2263 nai.updateLingerTimer(); 2264 if (nai.isLingering() && nai.numRequestNetworkRequests() > 0) { 2265 if (DBG) log("Unlingering " + nai.name()); 2266 nai.unlinger(); 2267 logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); 2268 } else if (unneeded(nai) && nai.getLingerExpiry() > 0) { // unneeded() calls isLingering() 2269 int lingerTime = (int) (nai.getLingerExpiry() - now); 2270 if (DBG) { 2271 Log.d(TAG, "Lingering " + nai.name() + " for " + lingerTime + "ms"); 2272 } 2273 nai.linger(); 2274 logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); 2275 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); 2276 } 2277 } 2278 2279 private void handleAsyncChannelHalfConnect(Message msg) { 2280 AsyncChannel ac = (AsyncChannel) msg.obj; 2281 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2282 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2283 if (VDBG) log("NetworkFactory connected"); 2284 // A network factory has connected. Send it all current NetworkRequests. 2285 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2286 if (nri.request.isListen()) continue; 2287 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2288 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2289 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2290 } 2291 } else { 2292 loge("Error connecting NetworkFactory"); 2293 mNetworkFactoryInfos.remove(msg.obj); 2294 } 2295 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2296 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2297 if (VDBG) log("NetworkAgent connected"); 2298 // A network agent has requested a connection. Establish the connection. 2299 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2300 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2301 } else { 2302 loge("Error connecting NetworkAgent"); 2303 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2304 if (nai != null) { 2305 final boolean wasDefault = isDefaultNetwork(nai); 2306 synchronized (mNetworkForNetId) { 2307 mNetworkForNetId.remove(nai.network.netId); 2308 mNetIdInUse.delete(nai.network.netId); 2309 } 2310 // Just in case. 2311 mLegacyTypeTracker.remove(nai, wasDefault); 2312 } 2313 } 2314 } 2315 } 2316 2317 private void handleAsyncChannelDisconnected(Message msg) { 2318 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2319 if (nai != null) { 2320 if (DBG) { 2321 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); 2322 } 2323 // A network agent has disconnected. 2324 // TODO - if we move the logic to the network agent (have them disconnect 2325 // because they lost all their requests or because their score isn't good) 2326 // then they would disconnect organically, report their new state and then 2327 // disconnect the channel. 2328 if (nai.networkInfo.isConnected()) { 2329 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2330 null, null); 2331 } 2332 final boolean wasDefault = isDefaultNetwork(nai); 2333 if (wasDefault) { 2334 mDefaultInetConditionPublished = 0; 2335 // Log default network disconnection before required book-keeping. 2336 // Let rematchAllNetworksAndRequests() below record a new default network event 2337 // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence 2338 // whose timestamps tell how long it takes to recover a default network. 2339 logDefaultNetworkEvent(null, nai); 2340 } 2341 notifyIfacesChangedForNetworkStats(); 2342 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2343 // by other networks that are already connected. Perhaps that can be done by 2344 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2345 // of rematchAllNetworksAndRequests 2346 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2347 mKeepaliveTracker.handleStopAllKeepalives(nai, 2348 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2349 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2350 mNetworkAgentInfos.remove(msg.replyTo); 2351 updateClat(null, nai.linkProperties, nai); 2352 synchronized (mNetworkForNetId) { 2353 // Remove the NetworkAgent, but don't mark the netId as 2354 // available until we've told netd to delete it below. 2355 mNetworkForNetId.remove(nai.network.netId); 2356 } 2357 // Remove all previously satisfied requests. 2358 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2359 NetworkRequest request = nai.requestAt(i); 2360 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2361 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2362 mNetworkForRequestId.remove(request.requestId); 2363 sendUpdatedScoreToFactories(request, 0); 2364 } 2365 } 2366 nai.clearLingerState(); 2367 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 2368 removeDataActivityTracking(nai); 2369 notifyLockdownVpn(nai); 2370 requestNetworkTransitionWakelock(nai.name()); 2371 } 2372 mLegacyTypeTracker.remove(nai, wasDefault); 2373 rematchAllNetworksAndRequests(null, 0); 2374 if (nai.created) { 2375 // Tell netd to clean up the configuration for this network 2376 // (routing rules, DNS, etc). 2377 // This may be slow as it requires a lot of netd shelling out to ip and 2378 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2379 // after we've rematched networks with requests which should make a potential 2380 // fallback network the default or requested a new network from the 2381 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2382 // long time. 2383 try { 2384 mNetd.removeNetwork(nai.network.netId); 2385 } catch (Exception e) { 2386 loge("Exception removing network: " + e); 2387 } 2388 } 2389 synchronized (mNetworkForNetId) { 2390 mNetIdInUse.delete(nai.network.netId); 2391 } 2392 } else { 2393 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2394 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2395 } 2396 } 2397 2398 // If this method proves to be too slow then we can maintain a separate 2399 // pendingIntent => NetworkRequestInfo map. 2400 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2401 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2402 Intent intent = pendingIntent.getIntent(); 2403 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2404 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2405 if (existingPendingIntent != null && 2406 existingPendingIntent.getIntent().filterEquals(intent)) { 2407 return entry.getValue(); 2408 } 2409 } 2410 return null; 2411 } 2412 2413 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2414 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2415 2416 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2417 if (existingRequest != null) { // remove the existing request. 2418 if (DBG) log("Replacing " + existingRequest.request + " with " 2419 + nri.request + " because their intents matched."); 2420 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2421 } 2422 handleRegisterNetworkRequest(nri); 2423 } 2424 2425 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2426 mNetworkRequests.put(nri.request, nri); 2427 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2428 if (nri.request.isListen()) { 2429 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2430 if (nri.request.networkCapabilities.hasSignalStrength() && 2431 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2432 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2433 } 2434 } 2435 } 2436 rematchAllNetworksAndRequests(null, 0); 2437 if (nri.request.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2438 sendUpdatedScoreToFactories(nri.request, 0); 2439 } 2440 } 2441 2442 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2443 int callingUid) { 2444 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2445 if (nri != null) { 2446 handleReleaseNetworkRequest(nri.request, callingUid); 2447 } 2448 } 2449 2450 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2451 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2452 // would it have a chance of satisfying any NetworkRequests. 2453 private boolean unneeded(NetworkAgentInfo nai) { 2454 if (!nai.everConnected || nai.isVPN() || 2455 nai.isLingering() || nai.numRequestNetworkRequests() > 0) { 2456 return false; 2457 } 2458 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2459 // If this Network is already the highest scoring Network for a request, or if 2460 // there is hope for it to become one if it validated, then it is needed. 2461 if (nri.request.isRequest() && nai.satisfies(nri.request) && 2462 (nai.isSatisfyingRequest(nri.request.requestId) || 2463 // Note that this catches two important cases: 2464 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2465 // is currently satisfying the request. This is desirable when 2466 // cellular ends up validating but WiFi does not. 2467 // 2. Unvalidated WiFi will not be reaped when validated cellular 2468 // is currently satisfying the request. This is desirable when 2469 // WiFi ends up validating and out scoring cellular. 2470 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2471 nai.getCurrentScoreAsValidated())) { 2472 return false; 2473 } 2474 } 2475 return true; 2476 } 2477 2478 private NetworkRequestInfo getNriForAppRequest( 2479 NetworkRequest request, int callingUid, String requestedOperation) { 2480 final NetworkRequestInfo nri = mNetworkRequests.get(request); 2481 2482 if (nri != null) { 2483 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2484 log(String.format("UID %d attempted to %s for unowned request %s", 2485 callingUid, requestedOperation, nri)); 2486 return null; 2487 } 2488 } 2489 2490 return nri; 2491 } 2492 2493 private void handleRequestCallbackUpdate(NetworkRequest request, int callingUid, 2494 String description, int callbackType) { 2495 final NetworkRequestInfo nri = getNriForAppRequest(request, callingUid, description); 2496 if (nri == null) return; 2497 2498 final NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2499 // The network that is satisfying this request may have changed since 2500 // the application requested the update. 2501 // 2502 // - If the request is no longer satisfied, don't send any updates. 2503 // - If the request is satisfied by a different network, it is the 2504 // caller's responsibility to check that the Network object in the 2505 // callback matches the network that was returned in the last 2506 // onAvailable() callback for this request. 2507 if (nai == null) return; 2508 callCallbackForRequest(nri, nai, callbackType, 0); 2509 } 2510 2511 private void handleRequestLinkProperties(NetworkRequest request, int callingUid) { 2512 handleRequestCallbackUpdate(request, callingUid, 2513 "request LinkProperties", ConnectivityManager.CALLBACK_IP_CHANGED); 2514 } 2515 2516 private void handleRequestNetworkCapabilities(NetworkRequest request, int callingUid) { 2517 handleRequestCallbackUpdate(request, callingUid, 2518 "request NetworkCapabilities", ConnectivityManager.CALLBACK_CAP_CHANGED); 2519 } 2520 2521 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2522 final NetworkRequestInfo nri = getNriForAppRequest( 2523 request, callingUid, "release NetworkRequest"); 2524 if (nri == null) return; 2525 2526 if (VDBG || (DBG && nri.request.isRequest())) log("releasing " + request); 2527 nri.unlinkDeathRecipient(); 2528 mNetworkRequests.remove(request); 2529 synchronized (mUidToNetworkRequestCount) { 2530 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2531 if (requests < 1) { 2532 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2533 nri.mUid); 2534 } else if (requests == 1) { 2535 mUidToNetworkRequestCount.removeAt( 2536 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2537 } else { 2538 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2539 } 2540 } 2541 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2542 if (nri.request.isRequest()) { 2543 boolean wasKept = false; 2544 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2545 if (nai != null) { 2546 nai.removeRequest(nri.request.requestId); 2547 if (VDBG) { 2548 log(" Removing from current network " + nai.name() + 2549 ", leaving " + nai.numNetworkRequests() + " requests."); 2550 } 2551 // If there are still lingered requests on this network, don't tear it down, 2552 // but resume lingering instead. 2553 updateLingerState(nai, SystemClock.elapsedRealtime()); 2554 if (unneeded(nai)) { 2555 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2556 teardownUnneededNetwork(nai); 2557 } else { 2558 wasKept = true; 2559 } 2560 mNetworkForRequestId.remove(nri.request.requestId); 2561 } 2562 2563 // TODO: remove this code once we know that the Slog.wtf is never hit. 2564 // 2565 // Find all networks that are satisfying this request and remove the request 2566 // from their request lists. 2567 // TODO - it's my understanding that for a request there is only a single 2568 // network satisfying it, so this loop is wasteful 2569 for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { 2570 if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { 2571 Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + 2572 otherNai.name() + ", but mNetworkAgentInfos says " + 2573 (nai != null ? nai.name() : "null")); 2574 } 2575 } 2576 2577 // Maintain the illusion. When this request arrived, we might have pretended 2578 // that a network connected to serve it, even though the network was already 2579 // connected. Now that this request has gone away, we might have to pretend 2580 // that the network disconnected. LegacyTypeTracker will generate that 2581 // phantom disconnect for this type. 2582 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2583 boolean doRemove = true; 2584 if (wasKept) { 2585 // check if any of the remaining requests for this network are for the 2586 // same legacy type - if so, don't remove the nai 2587 for (int i = 0; i < nai.numNetworkRequests(); i++) { 2588 NetworkRequest otherRequest = nai.requestAt(i); 2589 if (otherRequest.legacyType == nri.request.legacyType && 2590 otherRequest.isRequest()) { 2591 if (DBG) log(" still have other legacy request - leaving"); 2592 doRemove = false; 2593 } 2594 } 2595 } 2596 2597 if (doRemove) { 2598 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2599 } 2600 } 2601 2602 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2603 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2604 nri.request); 2605 } 2606 } else { 2607 // listens don't have a singular affectedNetwork. Check all networks to see 2608 // if this listen request applies and remove it. 2609 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2610 nai.removeRequest(nri.request.requestId); 2611 if (nri.request.networkCapabilities.hasSignalStrength() && 2612 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2613 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2614 } 2615 } 2616 } 2617 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED, 0); 2618 } 2619 2620 @Override 2621 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2622 enforceConnectivityInternalPermission(); 2623 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2624 accept ? 1 : 0, always ? 1: 0, network)); 2625 } 2626 2627 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2628 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2629 " accept=" + accept + " always=" + always); 2630 2631 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2632 if (nai == null) { 2633 // Nothing to do. 2634 return; 2635 } 2636 2637 if (nai.everValidated) { 2638 // The network validated while the dialog box was up. Take no action. 2639 return; 2640 } 2641 2642 if (!nai.networkMisc.explicitlySelected) { 2643 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2644 } 2645 2646 if (accept != nai.networkMisc.acceptUnvalidated) { 2647 int oldScore = nai.getCurrentScore(); 2648 nai.networkMisc.acceptUnvalidated = accept; 2649 rematchAllNetworksAndRequests(nai, oldScore); 2650 sendUpdatedScoreToFactories(nai); 2651 } 2652 2653 if (always) { 2654 nai.asyncChannel.sendMessage( 2655 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2656 } 2657 2658 if (!accept) { 2659 // Tell the NetworkAgent to not automatically reconnect to the network. 2660 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2661 // Teardown the nework. 2662 teardownUnneededNetwork(nai); 2663 } 2664 2665 } 2666 2667 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2668 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2669 mHandler.sendMessageDelayed( 2670 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2671 PROMPT_UNVALIDATED_DELAY_MS); 2672 } 2673 2674 private void handlePromptUnvalidated(Network network) { 2675 if (VDBG) log("handlePromptUnvalidated " + network); 2676 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2677 2678 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2679 // we haven't already been told to switch to it regardless of whether it validated or not. 2680 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2681 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2682 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2683 return; 2684 } 2685 2686 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2687 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2688 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2689 intent.setClassName("com.android.settings", 2690 "com.android.settings.wifi.WifiNoInternetDialog"); 2691 2692 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2693 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2694 2695 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2696 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2697 } 2698 2699 private class InternalHandler extends Handler { 2700 public InternalHandler(Looper looper) { 2701 super(looper); 2702 } 2703 2704 @Override 2705 public void handleMessage(Message msg) { 2706 switch (msg.what) { 2707 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2708 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2709 String causedBy = null; 2710 synchronized (ConnectivityService.this) { 2711 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2712 mNetTransitionWakeLock.isHeld()) { 2713 mNetTransitionWakeLock.release(); 2714 causedBy = mNetTransitionWakeLockCausedBy; 2715 } else { 2716 break; 2717 } 2718 } 2719 if (VDBG) { 2720 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2721 log("Failed to find a new network - expiring NetTransition Wakelock"); 2722 } else { 2723 log("NetTransition Wakelock (" + 2724 (causedBy == null ? "unknown" : causedBy) + 2725 " cleared because we found a replacement network"); 2726 } 2727 } 2728 break; 2729 } 2730 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2731 handleDeprecatedGlobalHttpProxy(); 2732 break; 2733 } 2734 case EVENT_PROXY_HAS_CHANGED: { 2735 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2736 break; 2737 } 2738 case EVENT_REGISTER_NETWORK_FACTORY: { 2739 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2740 break; 2741 } 2742 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2743 handleUnregisterNetworkFactory((Messenger)msg.obj); 2744 break; 2745 } 2746 case EVENT_REGISTER_NETWORK_AGENT: { 2747 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2748 break; 2749 } 2750 case EVENT_REGISTER_NETWORK_REQUEST: 2751 case EVENT_REGISTER_NETWORK_LISTENER: { 2752 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2753 break; 2754 } 2755 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2756 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2757 handleRegisterNetworkRequestWithIntent(msg); 2758 break; 2759 } 2760 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2761 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2762 break; 2763 } 2764 case EVENT_RELEASE_NETWORK_REQUEST: { 2765 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2766 break; 2767 } 2768 case EVENT_SET_ACCEPT_UNVALIDATED: { 2769 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2770 break; 2771 } 2772 case EVENT_PROMPT_UNVALIDATED: { 2773 handlePromptUnvalidated((Network) msg.obj); 2774 break; 2775 } 2776 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2777 handleMobileDataAlwaysOn(); 2778 break; 2779 } 2780 case EVENT_REQUEST_LINKPROPERTIES: 2781 handleRequestLinkProperties((NetworkRequest) msg.obj, msg.arg1); 2782 break; 2783 case EVENT_REQUEST_NETCAPABILITIES: 2784 handleRequestNetworkCapabilities((NetworkRequest) msg.obj, msg.arg1); 2785 break; 2786 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2787 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2788 mKeepaliveTracker.handleStartKeepalive(msg); 2789 break; 2790 } 2791 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2792 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2793 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2794 int slot = msg.arg1; 2795 int reason = msg.arg2; 2796 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2797 break; 2798 } 2799 case EVENT_SYSTEM_READY: { 2800 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2801 nai.networkMonitor.systemReady = true; 2802 } 2803 break; 2804 } 2805 } 2806 } 2807 } 2808 2809 // javadoc from interface 2810 @Override 2811 public int tether(String iface) { 2812 ConnectivityManager.enforceTetherChangePermission(mContext); 2813 if (isTetheringSupported()) { 2814 final int status = mTethering.tether(iface); 2815 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2816 try { 2817 mPolicyManager.onTetheringChanged(iface, true); 2818 } catch (RemoteException e) { 2819 } 2820 } 2821 return status; 2822 } else { 2823 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2824 } 2825 } 2826 2827 // javadoc from interface 2828 @Override 2829 public int untether(String iface) { 2830 ConnectivityManager.enforceTetherChangePermission(mContext); 2831 2832 if (isTetheringSupported()) { 2833 final int status = mTethering.untether(iface); 2834 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2835 try { 2836 mPolicyManager.onTetheringChanged(iface, false); 2837 } catch (RemoteException e) { 2838 } 2839 } 2840 return status; 2841 } else { 2842 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2843 } 2844 } 2845 2846 // javadoc from interface 2847 @Override 2848 public int getLastTetherError(String iface) { 2849 enforceTetherAccessPermission(); 2850 2851 if (isTetheringSupported()) { 2852 return mTethering.getLastTetherError(iface); 2853 } else { 2854 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2855 } 2856 } 2857 2858 // TODO - proper iface API for selection by property, inspection, etc 2859 @Override 2860 public String[] getTetherableUsbRegexs() { 2861 enforceTetherAccessPermission(); 2862 if (isTetheringSupported()) { 2863 return mTethering.getTetherableUsbRegexs(); 2864 } else { 2865 return new String[0]; 2866 } 2867 } 2868 2869 @Override 2870 public String[] getTetherableWifiRegexs() { 2871 enforceTetherAccessPermission(); 2872 if (isTetheringSupported()) { 2873 return mTethering.getTetherableWifiRegexs(); 2874 } else { 2875 return new String[0]; 2876 } 2877 } 2878 2879 @Override 2880 public String[] getTetherableBluetoothRegexs() { 2881 enforceTetherAccessPermission(); 2882 if (isTetheringSupported()) { 2883 return mTethering.getTetherableBluetoothRegexs(); 2884 } else { 2885 return new String[0]; 2886 } 2887 } 2888 2889 @Override 2890 public int setUsbTethering(boolean enable) { 2891 ConnectivityManager.enforceTetherChangePermission(mContext); 2892 if (isTetheringSupported()) { 2893 return mTethering.setUsbTethering(enable); 2894 } else { 2895 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2896 } 2897 } 2898 2899 // TODO - move iface listing, queries, etc to new module 2900 // javadoc from interface 2901 @Override 2902 public String[] getTetherableIfaces() { 2903 enforceTetherAccessPermission(); 2904 return mTethering.getTetherableIfaces(); 2905 } 2906 2907 @Override 2908 public String[] getTetheredIfaces() { 2909 enforceTetherAccessPermission(); 2910 return mTethering.getTetheredIfaces(); 2911 } 2912 2913 @Override 2914 public String[] getTetheringErroredIfaces() { 2915 enforceTetherAccessPermission(); 2916 return mTethering.getErroredIfaces(); 2917 } 2918 2919 @Override 2920 public String[] getTetheredDhcpRanges() { 2921 enforceConnectivityInternalPermission(); 2922 return mTethering.getTetheredDhcpRanges(); 2923 } 2924 2925 // if ro.tether.denied = true we default to no tethering 2926 // gservices could set the secure setting to 1 though to enable it on a build where it 2927 // had previously been turned off. 2928 @Override 2929 public boolean isTetheringSupported() { 2930 enforceTetherAccessPermission(); 2931 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2932 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2933 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2934 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2935 return tetherEnabledInSettings && mUserManager.isAdminUser() && 2936 ((mTethering.getTetherableUsbRegexs().length != 0 || 2937 mTethering.getTetherableWifiRegexs().length != 0 || 2938 mTethering.getTetherableBluetoothRegexs().length != 0) && 2939 mTethering.getUpstreamIfaceTypes().length != 0); 2940 } 2941 2942 @Override 2943 public void startTethering(int type, ResultReceiver receiver, 2944 boolean showProvisioningUi) { 2945 ConnectivityManager.enforceTetherChangePermission(mContext); 2946 if (!isTetheringSupported()) { 2947 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 2948 return; 2949 } 2950 mTethering.startTethering(type, receiver, showProvisioningUi); 2951 } 2952 2953 @Override 2954 public void stopTethering(int type) { 2955 ConnectivityManager.enforceTetherChangePermission(mContext); 2956 mTethering.stopTethering(type); 2957 } 2958 2959 // Called when we lose the default network and have no replacement yet. 2960 // This will automatically be cleared after X seconds or a new default network 2961 // becomes CONNECTED, whichever happens first. The timer is started by the 2962 // first caller and not restarted by subsequent callers. 2963 private void requestNetworkTransitionWakelock(String forWhom) { 2964 int serialNum = 0; 2965 synchronized (this) { 2966 if (mNetTransitionWakeLock.isHeld()) return; 2967 serialNum = ++mNetTransitionWakeLockSerialNumber; 2968 mNetTransitionWakeLock.acquire(); 2969 mNetTransitionWakeLockCausedBy = forWhom; 2970 } 2971 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2972 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2973 mNetTransitionWakeLockTimeout); 2974 return; 2975 } 2976 2977 // 100 percent is full good, 0 is full bad. 2978 @Override 2979 public void reportInetCondition(int networkType, int percentage) { 2980 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2981 if (nai == null) return; 2982 reportNetworkConnectivity(nai.network, percentage > 50); 2983 } 2984 2985 @Override 2986 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2987 enforceAccessPermission(); 2988 enforceInternetPermission(); 2989 2990 NetworkAgentInfo nai; 2991 if (network == null) { 2992 nai = getDefaultNetwork(); 2993 } else { 2994 nai = getNetworkAgentInfoForNetwork(network); 2995 } 2996 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2997 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2998 return; 2999 } 3000 // Revalidate if the app report does not match our current validated state. 3001 if (hasConnectivity == nai.lastValidated) return; 3002 final int uid = Binder.getCallingUid(); 3003 if (DBG) { 3004 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 3005 ") by " + uid); 3006 } 3007 synchronized (nai) { 3008 // Validating a network that has not yet connected could result in a call to 3009 // rematchNetworkAndRequests() which is not meant to work on such networks. 3010 if (!nai.everConnected) return; 3011 3012 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 3013 3014 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 3015 } 3016 } 3017 3018 private ProxyInfo getDefaultProxy() { 3019 // this information is already available as a world read/writable jvm property 3020 // so this API change wouldn't have a benifit. It also breaks the passing 3021 // of proxy info to all the JVMs. 3022 // enforceAccessPermission(); 3023 synchronized (mProxyLock) { 3024 ProxyInfo ret = mGlobalProxy; 3025 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 3026 return ret; 3027 } 3028 } 3029 3030 @Override 3031 public ProxyInfo getProxyForNetwork(Network network) { 3032 if (network == null) return getDefaultProxy(); 3033 final ProxyInfo globalProxy = getGlobalProxy(); 3034 if (globalProxy != null) return globalProxy; 3035 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 3036 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 3037 // caller may not have. 3038 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 3039 if (nai == null) return null; 3040 synchronized (nai) { 3041 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 3042 if (proxyInfo == null) return null; 3043 return new ProxyInfo(proxyInfo); 3044 } 3045 } 3046 3047 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 3048 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 3049 // proxy is null then there is no proxy in place). 3050 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 3051 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3052 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 3053 proxy = null; 3054 } 3055 return proxy; 3056 } 3057 3058 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 3059 // better for determining if a new proxy broadcast is necessary: 3060 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 3061 // avoid unnecessary broadcasts. 3062 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 3063 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 3064 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 3065 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 3066 // all set. 3067 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 3068 a = canonicalizeProxyInfo(a); 3069 b = canonicalizeProxyInfo(b); 3070 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 3071 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 3072 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 3073 } 3074 3075 public void setGlobalProxy(ProxyInfo proxyProperties) { 3076 enforceConnectivityInternalPermission(); 3077 3078 synchronized (mProxyLock) { 3079 if (proxyProperties == mGlobalProxy) return; 3080 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 3081 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 3082 3083 String host = ""; 3084 int port = 0; 3085 String exclList = ""; 3086 String pacFileUrl = ""; 3087 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 3088 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 3089 if (!proxyProperties.isValid()) { 3090 if (DBG) 3091 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3092 return; 3093 } 3094 mGlobalProxy = new ProxyInfo(proxyProperties); 3095 host = mGlobalProxy.getHost(); 3096 port = mGlobalProxy.getPort(); 3097 exclList = mGlobalProxy.getExclusionListAsString(); 3098 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 3099 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 3100 } 3101 } else { 3102 mGlobalProxy = null; 3103 } 3104 ContentResolver res = mContext.getContentResolver(); 3105 final long token = Binder.clearCallingIdentity(); 3106 try { 3107 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 3108 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 3109 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 3110 exclList); 3111 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 3112 } finally { 3113 Binder.restoreCallingIdentity(token); 3114 } 3115 3116 if (mGlobalProxy == null) { 3117 proxyProperties = mDefaultProxy; 3118 } 3119 sendProxyBroadcast(proxyProperties); 3120 } 3121 } 3122 3123 private void loadGlobalProxy() { 3124 ContentResolver res = mContext.getContentResolver(); 3125 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 3126 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 3127 String exclList = Settings.Global.getString(res, 3128 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 3129 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 3130 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 3131 ProxyInfo proxyProperties; 3132 if (!TextUtils.isEmpty(pacFileUrl)) { 3133 proxyProperties = new ProxyInfo(pacFileUrl); 3134 } else { 3135 proxyProperties = new ProxyInfo(host, port, exclList); 3136 } 3137 if (!proxyProperties.isValid()) { 3138 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 3139 return; 3140 } 3141 3142 synchronized (mProxyLock) { 3143 mGlobalProxy = proxyProperties; 3144 } 3145 } 3146 } 3147 3148 public ProxyInfo getGlobalProxy() { 3149 // this information is already available as a world read/writable jvm property 3150 // so this API change wouldn't have a benifit. It also breaks the passing 3151 // of proxy info to all the JVMs. 3152 // enforceAccessPermission(); 3153 synchronized (mProxyLock) { 3154 return mGlobalProxy; 3155 } 3156 } 3157 3158 private void handleApplyDefaultProxy(ProxyInfo proxy) { 3159 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3160 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3161 proxy = null; 3162 } 3163 synchronized (mProxyLock) { 3164 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3165 if (mDefaultProxy == proxy) return; // catches repeated nulls 3166 if (proxy != null && !proxy.isValid()) { 3167 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3168 return; 3169 } 3170 3171 // This call could be coming from the PacManager, containing the port of the local 3172 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3173 // global (to get the correct local port), and send a broadcast. 3174 // TODO: Switch PacManager to have its own message to send back rather than 3175 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3176 if ((mGlobalProxy != null) && (proxy != null) 3177 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3178 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3179 mGlobalProxy = proxy; 3180 sendProxyBroadcast(mGlobalProxy); 3181 return; 3182 } 3183 mDefaultProxy = proxy; 3184 3185 if (mGlobalProxy != null) return; 3186 if (!mDefaultProxyDisabled) { 3187 sendProxyBroadcast(proxy); 3188 } 3189 } 3190 } 3191 3192 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3193 // This method gets called when any network changes proxy, but the broadcast only ever contains 3194 // the default proxy (even if it hasn't changed). 3195 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3196 // world where an app might be bound to a non-default network. 3197 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3198 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3199 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3200 3201 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3202 sendProxyBroadcast(getDefaultProxy()); 3203 } 3204 } 3205 3206 private void handleDeprecatedGlobalHttpProxy() { 3207 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3208 Settings.Global.HTTP_PROXY); 3209 if (!TextUtils.isEmpty(proxy)) { 3210 String data[] = proxy.split(":"); 3211 if (data.length == 0) { 3212 return; 3213 } 3214 3215 String proxyHost = data[0]; 3216 int proxyPort = 8080; 3217 if (data.length > 1) { 3218 try { 3219 proxyPort = Integer.parseInt(data[1]); 3220 } catch (NumberFormatException e) { 3221 return; 3222 } 3223 } 3224 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3225 setGlobalProxy(p); 3226 } 3227 } 3228 3229 private void sendProxyBroadcast(ProxyInfo proxy) { 3230 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3231 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3232 if (DBG) log("sending Proxy Broadcast for " + proxy); 3233 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3234 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3235 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3236 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3237 final long ident = Binder.clearCallingIdentity(); 3238 try { 3239 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3240 } finally { 3241 Binder.restoreCallingIdentity(ident); 3242 } 3243 } 3244 3245 private static class SettingsObserver extends ContentObserver { 3246 final private HashMap<Uri, Integer> mUriEventMap; 3247 final private Context mContext; 3248 final private Handler mHandler; 3249 3250 SettingsObserver(Context context, Handler handler) { 3251 super(null); 3252 mUriEventMap = new HashMap<Uri, Integer>(); 3253 mContext = context; 3254 mHandler = handler; 3255 } 3256 3257 void observe(Uri uri, int what) { 3258 mUriEventMap.put(uri, what); 3259 final ContentResolver resolver = mContext.getContentResolver(); 3260 resolver.registerContentObserver(uri, false, this); 3261 } 3262 3263 @Override 3264 public void onChange(boolean selfChange) { 3265 Slog.wtf(TAG, "Should never be reached."); 3266 } 3267 3268 @Override 3269 public void onChange(boolean selfChange, Uri uri) { 3270 final Integer what = mUriEventMap.get(uri); 3271 if (what != null) { 3272 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3273 } else { 3274 loge("No matching event to send for URI=" + uri); 3275 } 3276 } 3277 } 3278 3279 private static void log(String s) { 3280 Slog.d(TAG, s); 3281 } 3282 3283 private static void loge(String s) { 3284 Slog.e(TAG, s); 3285 } 3286 3287 private static <T> T checkNotNull(T value, String message) { 3288 if (value == null) { 3289 throw new NullPointerException(message); 3290 } 3291 return value; 3292 } 3293 3294 /** 3295 * Prepare for a VPN application. 3296 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3297 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3298 * 3299 * @param oldPackage Package name of the application which currently controls VPN, which will 3300 * be replaced. If there is no such application, this should should either be 3301 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3302 * @param newPackage Package name of the application which should gain control of VPN, or 3303 * {@code null} to disable. 3304 * @param userId User for whom to prepare the new VPN. 3305 * 3306 * @hide 3307 */ 3308 @Override 3309 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3310 int userId) { 3311 enforceCrossUserPermission(userId); 3312 throwIfLockdownEnabled(); 3313 3314 synchronized(mVpns) { 3315 Vpn vpn = mVpns.get(userId); 3316 if (vpn != null) { 3317 return vpn.prepare(oldPackage, newPackage); 3318 } else { 3319 return false; 3320 } 3321 } 3322 } 3323 3324 /** 3325 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3326 * This method is used by system-privileged apps. 3327 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3328 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3329 * 3330 * @param packageName The package for which authorization state should change. 3331 * @param userId User for whom {@code packageName} is installed. 3332 * @param authorized {@code true} if this app should be able to start a VPN connection without 3333 * explicit user approval, {@code false} if not. 3334 * 3335 * @hide 3336 */ 3337 @Override 3338 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3339 enforceCrossUserPermission(userId); 3340 3341 synchronized(mVpns) { 3342 Vpn vpn = mVpns.get(userId); 3343 if (vpn != null) { 3344 vpn.setPackageAuthorization(packageName, authorized); 3345 } 3346 } 3347 } 3348 3349 /** 3350 * Configure a TUN interface and return its file descriptor. Parameters 3351 * are encoded and opaque to this class. This method is used by VpnBuilder 3352 * and not available in ConnectivityManager. Permissions are checked in 3353 * Vpn class. 3354 * @hide 3355 */ 3356 @Override 3357 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3358 throwIfLockdownEnabled(); 3359 int user = UserHandle.getUserId(Binder.getCallingUid()); 3360 synchronized(mVpns) { 3361 return mVpns.get(user).establish(config); 3362 } 3363 } 3364 3365 /** 3366 * Start legacy VPN, controlling native daemons as needed. Creates a 3367 * secondary thread to perform connection work, returning quickly. 3368 */ 3369 @Override 3370 public void startLegacyVpn(VpnProfile profile) { 3371 throwIfLockdownEnabled(); 3372 final LinkProperties egress = getActiveLinkProperties(); 3373 if (egress == null) { 3374 throw new IllegalStateException("Missing active network connection"); 3375 } 3376 int user = UserHandle.getUserId(Binder.getCallingUid()); 3377 synchronized(mVpns) { 3378 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3379 } 3380 } 3381 3382 /** 3383 * Return the information of the ongoing legacy VPN. This method is used 3384 * by VpnSettings and not available in ConnectivityManager. Permissions 3385 * are checked in Vpn class. 3386 */ 3387 @Override 3388 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3389 enforceCrossUserPermission(userId); 3390 3391 synchronized(mVpns) { 3392 return mVpns.get(userId).getLegacyVpnInfo(); 3393 } 3394 } 3395 3396 /** 3397 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3398 * and not available in ConnectivityManager. 3399 */ 3400 @Override 3401 public VpnInfo[] getAllVpnInfo() { 3402 enforceConnectivityInternalPermission(); 3403 if (mLockdownEnabled) { 3404 return new VpnInfo[0]; 3405 } 3406 3407 synchronized(mVpns) { 3408 List<VpnInfo> infoList = new ArrayList<>(); 3409 for (int i = 0; i < mVpns.size(); i++) { 3410 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3411 if (info != null) { 3412 infoList.add(info); 3413 } 3414 } 3415 return infoList.toArray(new VpnInfo[infoList.size()]); 3416 } 3417 } 3418 3419 /** 3420 * @return VPN information for accounting, or null if we can't retrieve all required 3421 * information, e.g primary underlying iface. 3422 */ 3423 @Nullable 3424 private VpnInfo createVpnInfo(Vpn vpn) { 3425 VpnInfo info = vpn.getVpnInfo(); 3426 if (info == null) { 3427 return null; 3428 } 3429 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3430 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3431 // the underlyingNetworks list. 3432 if (underlyingNetworks == null) { 3433 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3434 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3435 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3436 } 3437 } else if (underlyingNetworks.length > 0) { 3438 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3439 if (linkProperties != null) { 3440 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3441 } 3442 } 3443 return info.primaryUnderlyingIface == null ? null : info; 3444 } 3445 3446 /** 3447 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3448 * VpnDialogs and not available in ConnectivityManager. 3449 * Permissions are checked in Vpn class. 3450 * @hide 3451 */ 3452 @Override 3453 public VpnConfig getVpnConfig(int userId) { 3454 enforceCrossUserPermission(userId); 3455 synchronized(mVpns) { 3456 Vpn vpn = mVpns.get(userId); 3457 if (vpn != null) { 3458 return vpn.getVpnConfig(); 3459 } else { 3460 return null; 3461 } 3462 } 3463 } 3464 3465 @Override 3466 public boolean updateLockdownVpn() { 3467 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3468 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3469 return false; 3470 } 3471 3472 // Tear down existing lockdown if profile was removed 3473 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3474 if (mLockdownEnabled) { 3475 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3476 final VpnProfile profile = VpnProfile.decode( 3477 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3478 if (profile == null) { 3479 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3480 setLockdownTracker(null); 3481 return true; 3482 } 3483 int user = UserHandle.getUserId(Binder.getCallingUid()); 3484 synchronized(mVpns) { 3485 Vpn vpn = mVpns.get(user); 3486 if (vpn == null) { 3487 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3488 return false; 3489 } 3490 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3491 } 3492 } else { 3493 setLockdownTracker(null); 3494 } 3495 3496 return true; 3497 } 3498 3499 /** 3500 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3501 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3502 */ 3503 private void setLockdownTracker(LockdownVpnTracker tracker) { 3504 // Shutdown any existing tracker 3505 final LockdownVpnTracker existing = mLockdownTracker; 3506 mLockdownTracker = null; 3507 if (existing != null) { 3508 existing.shutdown(); 3509 } 3510 3511 try { 3512 if (tracker != null) { 3513 mNetd.setFirewallEnabled(true); 3514 mNetd.setFirewallInterfaceRule("lo", true); 3515 mLockdownTracker = tracker; 3516 mLockdownTracker.init(); 3517 } else { 3518 mNetd.setFirewallEnabled(false); 3519 } 3520 } catch (RemoteException e) { 3521 // ignored; NMS lives inside system_server 3522 } 3523 } 3524 3525 private void throwIfLockdownEnabled() { 3526 if (mLockdownEnabled) { 3527 throw new IllegalStateException("Unavailable in lockdown mode"); 3528 } 3529 } 3530 3531 /** 3532 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3533 * some setup and then call {@code establish()} to connect. 3534 * 3535 * @return {@code true} if the service was started, the service was already connected, or there 3536 * was no always-on VPN to start. {@code false} otherwise. 3537 */ 3538 private boolean startAlwaysOnVpn(int userId) { 3539 synchronized (mVpns) { 3540 Vpn vpn = mVpns.get(userId); 3541 if (vpn == null) { 3542 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3543 // exists already. 3544 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3545 return false; 3546 } 3547 3548 return vpn.startAlwaysOnVpn(); 3549 } 3550 } 3551 3552 @Override 3553 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3554 enforceConnectivityInternalPermission(); 3555 enforceCrossUserPermission(userId); 3556 3557 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3558 if (LockdownVpnTracker.isEnabled()) { 3559 return false; 3560 } 3561 3562 synchronized (mVpns) { 3563 Vpn vpn = mVpns.get(userId); 3564 if (vpn == null) { 3565 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3566 return false; 3567 } 3568 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3569 return false; 3570 } 3571 if (!startAlwaysOnVpn(userId)) { 3572 vpn.setAlwaysOnPackage(null, false); 3573 return false; 3574 } 3575 3576 vpn.saveAlwaysOnPackage(); 3577 } 3578 return true; 3579 } 3580 3581 @Override 3582 public String getAlwaysOnVpnPackage(int userId) { 3583 enforceConnectivityInternalPermission(); 3584 enforceCrossUserPermission(userId); 3585 3586 synchronized (mVpns) { 3587 Vpn vpn = mVpns.get(userId); 3588 if (vpn == null) { 3589 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3590 return null; 3591 } 3592 return vpn.getAlwaysOnPackage(); 3593 } 3594 } 3595 3596 @Override 3597 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3598 // TODO: Remove? Any reason to trigger a provisioning check? 3599 return -1; 3600 } 3601 3602 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3603 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3604 3605 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3606 Intent intent = new Intent(action); 3607 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3608 // Concatenate the range of types onto the range of NetIDs. 3609 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3610 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3611 networkType, null, pendingIntent, false); 3612 } 3613 3614 /** 3615 * Show or hide network provisioning notifications. 3616 * 3617 * We use notifications for two purposes: to notify that a network requires sign in 3618 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3619 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3620 * particular network we can display the notification type that was most recently requested. 3621 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3622 * might first display NO_INTERNET, and then when the captive portal check completes, display 3623 * SIGN_IN. 3624 * 3625 * @param id an identifier that uniquely identifies this notification. This must match 3626 * between show and hide calls. We use the NetID value but for legacy callers 3627 * we concatenate the range of types with the range of NetIDs. 3628 */ 3629 private void setProvNotificationVisibleIntent(boolean visible, int id, 3630 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3631 boolean highPriority) { 3632 if (VDBG || (DBG && visible)) { 3633 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3634 + " networkType=" + getNetworkTypeName(networkType) 3635 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3636 } 3637 3638 Resources r = Resources.getSystem(); 3639 NotificationManager notificationManager = (NotificationManager) mContext 3640 .getSystemService(Context.NOTIFICATION_SERVICE); 3641 3642 if (visible) { 3643 CharSequence title; 3644 CharSequence details; 3645 int icon; 3646 if (notifyType == NotificationType.NO_INTERNET && 3647 networkType == ConnectivityManager.TYPE_WIFI) { 3648 title = r.getString(R.string.wifi_no_internet, 0); 3649 details = r.getString(R.string.wifi_no_internet_detailed); 3650 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3651 } else if (notifyType == NotificationType.SIGN_IN) { 3652 switch (networkType) { 3653 case ConnectivityManager.TYPE_WIFI: 3654 title = r.getString(R.string.wifi_available_sign_in, 0); 3655 details = r.getString(R.string.network_available_sign_in_detailed, 3656 extraInfo); 3657 icon = R.drawable.stat_notify_wifi_in_range; 3658 break; 3659 case ConnectivityManager.TYPE_MOBILE: 3660 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3661 title = r.getString(R.string.network_available_sign_in, 0); 3662 // TODO: Change this to pull from NetworkInfo once a printable 3663 // name has been added to it 3664 details = mTelephonyManager.getNetworkOperatorName(); 3665 icon = R.drawable.stat_notify_rssi_in_range; 3666 break; 3667 default: 3668 title = r.getString(R.string.network_available_sign_in, 0); 3669 details = r.getString(R.string.network_available_sign_in_detailed, 3670 extraInfo); 3671 icon = R.drawable.stat_notify_rssi_in_range; 3672 break; 3673 } 3674 } else { 3675 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3676 + getNetworkTypeName(networkType)); 3677 return; 3678 } 3679 3680 Notification notification = new Notification.Builder(mContext) 3681 .setWhen(0) 3682 .setSmallIcon(icon) 3683 .setAutoCancel(true) 3684 .setTicker(title) 3685 .setColor(mContext.getColor( 3686 com.android.internal.R.color.system_notification_accent_color)) 3687 .setContentTitle(title) 3688 .setContentText(details) 3689 .setContentIntent(intent) 3690 .setLocalOnly(true) 3691 .setPriority(highPriority ? 3692 Notification.PRIORITY_HIGH : 3693 Notification.PRIORITY_DEFAULT) 3694 .setDefaults(highPriority ? Notification.DEFAULT_ALL : 0) 3695 .setOnlyAlertOnce(true) 3696 .build(); 3697 3698 try { 3699 notificationManager.notifyAsUser(NOTIFICATION_ID, id, notification, UserHandle.ALL); 3700 } catch (NullPointerException npe) { 3701 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3702 npe.printStackTrace(); 3703 } 3704 } else { 3705 try { 3706 notificationManager.cancelAsUser(NOTIFICATION_ID, id, UserHandle.ALL); 3707 } catch (NullPointerException npe) { 3708 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3709 npe.printStackTrace(); 3710 } 3711 } 3712 } 3713 3714 /** Location to an updatable file listing carrier provisioning urls. 3715 * An example: 3716 * 3717 * <?xml version="1.0" encoding="utf-8"?> 3718 * <provisioningUrls> 3719 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3720 * </provisioningUrls> 3721 */ 3722 private static final String PROVISIONING_URL_PATH = 3723 "/data/misc/radio/provisioning_urls.xml"; 3724 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3725 3726 /** XML tag for root element. */ 3727 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3728 /** XML tag for individual url */ 3729 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3730 /** XML attribute for mcc */ 3731 private static final String ATTR_MCC = "mcc"; 3732 /** XML attribute for mnc */ 3733 private static final String ATTR_MNC = "mnc"; 3734 3735 private String getProvisioningUrlBaseFromFile() { 3736 FileReader fileReader = null; 3737 XmlPullParser parser = null; 3738 Configuration config = mContext.getResources().getConfiguration(); 3739 3740 try { 3741 fileReader = new FileReader(mProvisioningUrlFile); 3742 parser = Xml.newPullParser(); 3743 parser.setInput(fileReader); 3744 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3745 3746 while (true) { 3747 XmlUtils.nextElement(parser); 3748 3749 String element = parser.getName(); 3750 if (element == null) break; 3751 3752 if (element.equals(TAG_PROVISIONING_URL)) { 3753 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3754 try { 3755 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3756 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3757 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3758 parser.next(); 3759 if (parser.getEventType() == XmlPullParser.TEXT) { 3760 return parser.getText(); 3761 } 3762 } 3763 } 3764 } catch (NumberFormatException e) { 3765 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3766 } 3767 } 3768 } 3769 return null; 3770 } catch (FileNotFoundException e) { 3771 loge("Carrier Provisioning Urls file not found"); 3772 } catch (XmlPullParserException e) { 3773 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3774 } catch (IOException e) { 3775 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3776 } finally { 3777 if (fileReader != null) { 3778 try { 3779 fileReader.close(); 3780 } catch (IOException e) {} 3781 } 3782 } 3783 return null; 3784 } 3785 3786 @Override 3787 public String getMobileProvisioningUrl() { 3788 enforceConnectivityInternalPermission(); 3789 String url = getProvisioningUrlBaseFromFile(); 3790 if (TextUtils.isEmpty(url)) { 3791 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3792 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3793 } else { 3794 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3795 } 3796 // populate the iccid, imei and phone number in the provisioning url. 3797 if (!TextUtils.isEmpty(url)) { 3798 String phoneNumber = mTelephonyManager.getLine1Number(); 3799 if (TextUtils.isEmpty(phoneNumber)) { 3800 phoneNumber = "0000000000"; 3801 } 3802 url = String.format(url, 3803 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3804 mTelephonyManager.getDeviceId() /* IMEI */, 3805 phoneNumber /* Phone numer */); 3806 } 3807 3808 return url; 3809 } 3810 3811 @Override 3812 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3813 String action) { 3814 enforceConnectivityInternalPermission(); 3815 final long ident = Binder.clearCallingIdentity(); 3816 try { 3817 setProvNotificationVisible(visible, networkType, action); 3818 } finally { 3819 Binder.restoreCallingIdentity(ident); 3820 } 3821 } 3822 3823 @Override 3824 public void setAirplaneMode(boolean enable) { 3825 enforceConnectivityInternalPermission(); 3826 final long ident = Binder.clearCallingIdentity(); 3827 try { 3828 final ContentResolver cr = mContext.getContentResolver(); 3829 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3830 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3831 intent.putExtra("state", enable); 3832 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3833 } finally { 3834 Binder.restoreCallingIdentity(ident); 3835 } 3836 } 3837 3838 private void onUserStart(int userId) { 3839 synchronized(mVpns) { 3840 Vpn userVpn = mVpns.get(userId); 3841 if (userVpn != null) { 3842 loge("Starting user already has a VPN"); 3843 return; 3844 } 3845 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3846 mVpns.put(userId, userVpn); 3847 3848 final ContentResolver cr = mContext.getContentResolver(); 3849 String alwaysOnPackage = Settings.Secure.getStringForUser(cr, 3850 Settings.Secure.ALWAYS_ON_VPN_APP, userId); 3851 final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, 3852 Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; 3853 if (alwaysOnPackage != null) { 3854 userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); 3855 } 3856 } 3857 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3858 updateLockdownVpn(); 3859 } 3860 } 3861 3862 private void onUserStop(int userId) { 3863 synchronized(mVpns) { 3864 Vpn userVpn = mVpns.get(userId); 3865 if (userVpn == null) { 3866 loge("Stopped user has no VPN"); 3867 return; 3868 } 3869 userVpn.onUserStopped(); 3870 mVpns.delete(userId); 3871 } 3872 } 3873 3874 private void onUserAdded(int userId) { 3875 synchronized(mVpns) { 3876 final int vpnsSize = mVpns.size(); 3877 for (int i = 0; i < vpnsSize; i++) { 3878 Vpn vpn = mVpns.valueAt(i); 3879 vpn.onUserAdded(userId); 3880 } 3881 } 3882 } 3883 3884 private void onUserRemoved(int userId) { 3885 synchronized(mVpns) { 3886 final int vpnsSize = mVpns.size(); 3887 for (int i = 0; i < vpnsSize; i++) { 3888 Vpn vpn = mVpns.valueAt(i); 3889 vpn.onUserRemoved(userId); 3890 } 3891 } 3892 } 3893 3894 private void onUserUnlocked(int userId) { 3895 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3896 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3897 updateLockdownVpn(); 3898 } else { 3899 startAlwaysOnVpn(userId); 3900 } 3901 } 3902 3903 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3904 @Override 3905 public void onReceive(Context context, Intent intent) { 3906 final String action = intent.getAction(); 3907 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3908 if (userId == UserHandle.USER_NULL) return; 3909 3910 if (Intent.ACTION_USER_STARTED.equals(action)) { 3911 onUserStart(userId); 3912 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3913 onUserStop(userId); 3914 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3915 onUserAdded(userId); 3916 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3917 onUserRemoved(userId); 3918 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3919 onUserUnlocked(userId); 3920 } 3921 } 3922 }; 3923 3924 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3925 new HashMap<Messenger, NetworkFactoryInfo>(); 3926 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3927 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3928 3929 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3930 // Map from UID to number of NetworkRequests that UID has filed. 3931 @GuardedBy("mUidToNetworkRequestCount") 3932 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3933 3934 private static class NetworkFactoryInfo { 3935 public final String name; 3936 public final Messenger messenger; 3937 public final AsyncChannel asyncChannel; 3938 3939 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3940 this.name = name; 3941 this.messenger = messenger; 3942 this.asyncChannel = asyncChannel; 3943 } 3944 } 3945 3946 private void ensureNetworkRequestHasType(NetworkRequest request) { 3947 if (request.type == NetworkRequest.Type.NONE) { 3948 throw new IllegalArgumentException( 3949 "All NetworkRequests in ConnectivityService must have a type"); 3950 } 3951 } 3952 3953 /** 3954 * Tracks info about the requester. 3955 * Also used to notice when the calling process dies so we can self-expire 3956 */ 3957 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3958 final NetworkRequest request; 3959 final PendingIntent mPendingIntent; 3960 boolean mPendingIntentSent; 3961 private final IBinder mBinder; 3962 final int mPid; 3963 final int mUid; 3964 final Messenger messenger; 3965 3966 NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { 3967 request = r; 3968 ensureNetworkRequestHasType(request); 3969 mPendingIntent = pi; 3970 messenger = null; 3971 mBinder = null; 3972 mPid = getCallingPid(); 3973 mUid = getCallingUid(); 3974 enforceRequestCountLimit(); 3975 } 3976 3977 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { 3978 super(); 3979 messenger = m; 3980 request = r; 3981 ensureNetworkRequestHasType(request); 3982 mBinder = binder; 3983 mPid = getCallingPid(); 3984 mUid = getCallingUid(); 3985 mPendingIntent = null; 3986 enforceRequestCountLimit(); 3987 3988 try { 3989 mBinder.linkToDeath(this, 0); 3990 } catch (RemoteException e) { 3991 binderDied(); 3992 } 3993 } 3994 3995 private void enforceRequestCountLimit() { 3996 synchronized (mUidToNetworkRequestCount) { 3997 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 3998 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 3999 throw new IllegalArgumentException("Too many NetworkRequests filed"); 4000 } 4001 mUidToNetworkRequestCount.put(mUid, networkRequests); 4002 } 4003 } 4004 4005 void unlinkDeathRecipient() { 4006 if (mBinder != null) { 4007 mBinder.unlinkToDeath(this, 0); 4008 } 4009 } 4010 4011 public void binderDied() { 4012 log("ConnectivityService NetworkRequestInfo binderDied(" + 4013 request + ", " + mBinder + ")"); 4014 releaseNetworkRequest(request); 4015 } 4016 4017 public String toString() { 4018 return "uid/pid:" + mUid + "/" + mPid + " " + request + 4019 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 4020 } 4021 } 4022 4023 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 4024 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 4025 if (badCapability != null) { 4026 throw new IllegalArgumentException("Cannot request network with " + badCapability); 4027 } 4028 } 4029 4030 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 4031 final SortedSet<Integer> thresholds = new TreeSet(); 4032 synchronized (nai) { 4033 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4034 if (nri.request.networkCapabilities.hasSignalStrength() && 4035 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 4036 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 4037 } 4038 } 4039 } 4040 return new ArrayList<Integer>(thresholds); 4041 } 4042 4043 private void updateSignalStrengthThresholds( 4044 NetworkAgentInfo nai, String reason, NetworkRequest request) { 4045 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 4046 Bundle thresholds = new Bundle(); 4047 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 4048 4049 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 4050 String detail; 4051 if (request != null && request.networkCapabilities.hasSignalStrength()) { 4052 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 4053 } else { 4054 detail = reason; 4055 } 4056 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 4057 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 4058 } 4059 4060 nai.asyncChannel.sendMessage( 4061 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 4062 0, 0, thresholds); 4063 } 4064 4065 @Override 4066 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 4067 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 4068 final NetworkRequest.Type type = (networkCapabilities == null) 4069 ? NetworkRequest.Type.TRACK_DEFAULT 4070 : NetworkRequest.Type.REQUEST; 4071 // If the requested networkCapabilities is null, take them instead from 4072 // the default network request. This allows callers to keep track of 4073 // the system default network. 4074 if (type == NetworkRequest.Type.TRACK_DEFAULT) { 4075 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 4076 enforceAccessPermission(); 4077 } else { 4078 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4079 enforceNetworkRequestPermissions(networkCapabilities); 4080 // TODO: this is incorrect. We mark the request as metered or not depending on the state 4081 // of the app when the request is filed, but we never change the request if the app 4082 // changes network state. http://b/29964605 4083 enforceMeteredApnPolicy(networkCapabilities); 4084 } 4085 ensureRequestableCapabilities(networkCapabilities); 4086 4087 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 4088 throw new IllegalArgumentException("Bad timeout specified"); 4089 } 4090 4091 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 4092 .equals(networkCapabilities.getNetworkSpecifier())) { 4093 throw new IllegalArgumentException("Invalid network specifier - must not be '" 4094 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 4095 } 4096 4097 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4098 nextNetworkRequestId(), type); 4099 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4100 if (DBG) log("requestNetwork for " + nri); 4101 4102 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4103 if (timeoutMs > 0) { 4104 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4105 nri), timeoutMs); 4106 } 4107 return networkRequest; 4108 } 4109 4110 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4111 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4112 enforceConnectivityInternalPermission(); 4113 } else { 4114 enforceChangePermission(); 4115 } 4116 } 4117 4118 @Override 4119 public boolean requestBandwidthUpdate(Network network) { 4120 enforceAccessPermission(); 4121 NetworkAgentInfo nai = null; 4122 if (network == null) { 4123 return false; 4124 } 4125 synchronized (mNetworkForNetId) { 4126 nai = mNetworkForNetId.get(network.netId); 4127 } 4128 if (nai != null) { 4129 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4130 return true; 4131 } 4132 return false; 4133 } 4134 4135 private boolean isSystem(int uid) { 4136 return uid < Process.FIRST_APPLICATION_UID; 4137 } 4138 4139 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4140 final int uid = Binder.getCallingUid(); 4141 if (isSystem(uid)) { 4142 return; 4143 } 4144 // if UID is restricted, don't allow them to bring up metered APNs 4145 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 4146 final int uidRules; 4147 synchronized(mRulesLock) { 4148 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 4149 } 4150 if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 4151 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { 4152 // we could silently fail or we can filter the available nets to only give 4153 // them those they have access to. Chose the more useful option. 4154 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4155 } 4156 } 4157 } 4158 4159 @Override 4160 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4161 PendingIntent operation) { 4162 checkNotNull(operation, "PendingIntent cannot be null."); 4163 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4164 enforceNetworkRequestPermissions(networkCapabilities); 4165 enforceMeteredApnPolicy(networkCapabilities); 4166 ensureRequestableCapabilities(networkCapabilities); 4167 4168 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4169 nextNetworkRequestId(), NetworkRequest.Type.REQUEST); 4170 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4171 if (DBG) log("pendingRequest for " + nri); 4172 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4173 nri)); 4174 return networkRequest; 4175 } 4176 4177 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4178 mHandler.sendMessageDelayed( 4179 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4180 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4181 } 4182 4183 @Override 4184 public void releasePendingNetworkRequest(PendingIntent operation) { 4185 checkNotNull(operation, "PendingIntent cannot be null."); 4186 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4187 getCallingUid(), 0, operation)); 4188 } 4189 4190 // In order to implement the compatibility measure for pre-M apps that call 4191 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4192 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4193 // This ensures it has permission to do so. 4194 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4195 if (nc == null) { 4196 return false; 4197 } 4198 int[] transportTypes = nc.getTransportTypes(); 4199 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4200 return false; 4201 } 4202 try { 4203 mContext.enforceCallingOrSelfPermission( 4204 android.Manifest.permission.ACCESS_WIFI_STATE, 4205 "ConnectivityService"); 4206 } catch (SecurityException e) { 4207 return false; 4208 } 4209 return true; 4210 } 4211 4212 @Override 4213 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4214 Messenger messenger, IBinder binder) { 4215 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4216 enforceAccessPermission(); 4217 } 4218 4219 NetworkRequest networkRequest = new NetworkRequest( 4220 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4221 NetworkRequest.Type.LISTEN); 4222 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); 4223 if (VDBG) log("listenForNetwork for " + nri); 4224 4225 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4226 return networkRequest; 4227 } 4228 4229 @Override 4230 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4231 PendingIntent operation) { 4232 checkNotNull(operation, "PendingIntent cannot be null."); 4233 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4234 enforceAccessPermission(); 4235 } 4236 4237 NetworkRequest networkRequest = new NetworkRequest( 4238 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), 4239 NetworkRequest.Type.LISTEN); 4240 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); 4241 if (VDBG) log("pendingListenForNetwork for " + nri); 4242 4243 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4244 } 4245 4246 @Override 4247 public void requestLinkProperties(NetworkRequest networkRequest) { 4248 ensureNetworkRequestHasType(networkRequest); 4249 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4250 mHandler.sendMessage(mHandler.obtainMessage( 4251 EVENT_REQUEST_LINKPROPERTIES, getCallingUid(), 0, networkRequest)); 4252 } 4253 4254 @Override 4255 public void requestNetworkCapabilities(NetworkRequest networkRequest) { 4256 ensureNetworkRequestHasType(networkRequest); 4257 if (networkRequest.type == NetworkRequest.Type.LISTEN) return; 4258 mHandler.sendMessage(mHandler.obtainMessage( 4259 EVENT_REQUEST_NETCAPABILITIES, getCallingUid(), 0, networkRequest)); 4260 } 4261 4262 @Override 4263 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4264 ensureNetworkRequestHasType(networkRequest); 4265 mHandler.sendMessage(mHandler.obtainMessage( 4266 EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); 4267 } 4268 4269 @Override 4270 public void registerNetworkFactory(Messenger messenger, String name) { 4271 enforceConnectivityInternalPermission(); 4272 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4273 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4274 } 4275 4276 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4277 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4278 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4279 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4280 } 4281 4282 @Override 4283 public void unregisterNetworkFactory(Messenger messenger) { 4284 enforceConnectivityInternalPermission(); 4285 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4286 } 4287 4288 private void handleUnregisterNetworkFactory(Messenger messenger) { 4289 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4290 if (nfi == null) { 4291 loge("Failed to find Messenger in unregisterNetworkFactory"); 4292 return; 4293 } 4294 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4295 } 4296 4297 /** 4298 * NetworkAgentInfo supporting a request by requestId. 4299 * These have already been vetted (their Capabilities satisfy the request) 4300 * and the are the highest scored network available. 4301 * the are keyed off the Requests requestId. 4302 */ 4303 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4304 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4305 new SparseArray<NetworkAgentInfo>(); 4306 4307 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4308 @GuardedBy("mNetworkForNetId") 4309 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4310 new SparseArray<NetworkAgentInfo>(); 4311 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4312 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4313 // there may not be a strict 1:1 correlation between the two. 4314 @GuardedBy("mNetworkForNetId") 4315 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4316 4317 // NetworkAgentInfo keyed off its connecting messenger 4318 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4319 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4320 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4321 new HashMap<Messenger, NetworkAgentInfo>(); 4322 4323 @GuardedBy("mBlockedAppUids") 4324 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4325 4326 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4327 private final NetworkRequest mDefaultRequest; 4328 4329 // Request used to optionally keep mobile data active even when higher 4330 // priority networks like Wi-Fi are active. 4331 private final NetworkRequest mDefaultMobileDataRequest; 4332 4333 private NetworkAgentInfo getDefaultNetwork() { 4334 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4335 } 4336 4337 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4338 return nai == getDefaultNetwork(); 4339 } 4340 4341 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4342 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4343 int currentScore, NetworkMisc networkMisc) { 4344 enforceConnectivityInternalPermission(); 4345 4346 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4347 // satisfies mDefaultRequest. 4348 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4349 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4350 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4351 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4352 synchronized (this) { 4353 nai.networkMonitor.systemReady = mSystemReady; 4354 } 4355 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, 4356 networkInfo.getExtraInfo()); 4357 if (DBG) log("registerNetworkAgent " + nai); 4358 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4359 return nai.network.netId; 4360 } 4361 4362 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4363 if (VDBG) log("Got NetworkAgent Messenger"); 4364 mNetworkAgentInfos.put(na.messenger, na); 4365 synchronized (mNetworkForNetId) { 4366 mNetworkForNetId.put(na.network.netId, na); 4367 } 4368 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4369 NetworkInfo networkInfo = na.networkInfo; 4370 na.networkInfo = null; 4371 updateNetworkInfo(na, networkInfo); 4372 } 4373 4374 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4375 LinkProperties newLp = networkAgent.linkProperties; 4376 int netId = networkAgent.network.netId; 4377 4378 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4379 // we do anything else, make sure its LinkProperties are accurate. 4380 if (networkAgent.clatd != null) { 4381 networkAgent.clatd.fixupLinkProperties(oldLp); 4382 } 4383 4384 updateInterfaces(newLp, oldLp, netId); 4385 updateMtu(newLp, oldLp); 4386 // TODO - figure out what to do for clat 4387// for (LinkProperties lp : newLp.getStackedLinks()) { 4388// updateMtu(lp, null); 4389// } 4390 updateTcpBufferSizes(networkAgent); 4391 4392 updateRoutes(newLp, oldLp, netId); 4393 updateDnses(newLp, oldLp, netId); 4394 4395 updateClat(newLp, oldLp, networkAgent); 4396 if (isDefaultNetwork(networkAgent)) { 4397 handleApplyDefaultProxy(newLp.getHttpProxy()); 4398 } else { 4399 updateProxy(newLp, oldLp, networkAgent); 4400 } 4401 // TODO - move this check to cover the whole function 4402 if (!Objects.equals(newLp, oldLp)) { 4403 notifyIfacesChangedForNetworkStats(); 4404 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4405 } 4406 4407 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4408 } 4409 4410 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4411 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4412 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4413 4414 if (!wasRunningClat && shouldRunClat) { 4415 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4416 nai.clatd.start(); 4417 } else if (wasRunningClat && !shouldRunClat) { 4418 nai.clatd.stop(); 4419 } 4420 } 4421 4422 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4423 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4424 if (oldLp != null) { 4425 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4426 } else if (newLp != null) { 4427 interfaceDiff.added = newLp.getAllInterfaceNames(); 4428 } 4429 for (String iface : interfaceDiff.added) { 4430 try { 4431 if (DBG) log("Adding iface " + iface + " to network " + netId); 4432 mNetd.addInterfaceToNetwork(iface, netId); 4433 } catch (Exception e) { 4434 loge("Exception adding interface: " + e); 4435 } 4436 } 4437 for (String iface : interfaceDiff.removed) { 4438 try { 4439 if (DBG) log("Removing iface " + iface + " from network " + netId); 4440 mNetd.removeInterfaceFromNetwork(iface, netId); 4441 } catch (Exception e) { 4442 loge("Exception removing interface: " + e); 4443 } 4444 } 4445 } 4446 4447 /** 4448 * Have netd update routes from oldLp to newLp. 4449 * @return true if routes changed between oldLp and newLp 4450 */ 4451 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4452 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4453 if (oldLp != null) { 4454 routeDiff = oldLp.compareAllRoutes(newLp); 4455 } else if (newLp != null) { 4456 routeDiff.added = newLp.getAllRoutes(); 4457 } 4458 4459 // add routes before removing old in case it helps with continuous connectivity 4460 4461 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4462 for (RouteInfo route : routeDiff.added) { 4463 if (route.hasGateway()) continue; 4464 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4465 try { 4466 mNetd.addRoute(netId, route); 4467 } catch (Exception e) { 4468 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4469 loge("Exception in addRoute for non-gateway: " + e); 4470 } 4471 } 4472 } 4473 for (RouteInfo route : routeDiff.added) { 4474 if (route.hasGateway() == false) continue; 4475 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4476 try { 4477 mNetd.addRoute(netId, route); 4478 } catch (Exception e) { 4479 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4480 loge("Exception in addRoute for gateway: " + e); 4481 } 4482 } 4483 } 4484 4485 for (RouteInfo route : routeDiff.removed) { 4486 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4487 try { 4488 mNetd.removeRoute(netId, route); 4489 } catch (Exception e) { 4490 loge("Exception in removeRoute: " + e); 4491 } 4492 } 4493 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4494 } 4495 4496 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4497 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4498 return; // no updating necessary 4499 } 4500 4501 Collection<InetAddress> dnses = newLp.getDnsServers(); 4502 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4503 try { 4504 mNetd.setDnsConfigurationForNetwork( 4505 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4506 } catch (Exception e) { 4507 loge("Exception in setDnsConfigurationForNetwork: " + e); 4508 } 4509 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4510 if (defaultNai != null && defaultNai.network.netId == netId) { 4511 setDefaultDnsSystemProperties(dnses); 4512 } 4513 flushVmDnsCache(); 4514 } 4515 4516 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4517 int last = 0; 4518 for (InetAddress dns : dnses) { 4519 ++last; 4520 String key = "net.dns" + last; 4521 String value = dns.getHostAddress(); 4522 SystemProperties.set(key, value); 4523 } 4524 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4525 String key = "net.dns" + i; 4526 SystemProperties.set(key, ""); 4527 } 4528 mNumDnsEntries = last; 4529 } 4530 4531 /** 4532 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4533 * augmented with any stateful capabilities implied from {@code networkAgent} 4534 * (e.g., validated status and captive portal status). 4535 * 4536 * @param nai the network having its capabilities updated. 4537 * @param networkCapabilities the new network capabilities. 4538 */ 4539 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4540 // Don't modify caller's NetworkCapabilities. 4541 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4542 if (nai.lastValidated) { 4543 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4544 } else { 4545 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4546 } 4547 if (nai.lastCaptivePortalDetected) { 4548 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4549 } else { 4550 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4551 } 4552 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4553 final int oldScore = nai.getCurrentScore(); 4554 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4555 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4556 try { 4557 mNetd.setNetworkPermission(nai.network.netId, 4558 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4559 null : NetworkManagementService.PERMISSION_SYSTEM); 4560 } catch (RemoteException e) { 4561 loge("Exception in setNetworkPermission: " + e); 4562 } 4563 } 4564 synchronized (nai) { 4565 nai.networkCapabilities = networkCapabilities; 4566 } 4567 rematchAllNetworksAndRequests(nai, oldScore); 4568 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4569 } 4570 } 4571 4572 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4573 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4574 NetworkRequest nr = nai.requestAt(i); 4575 // Don't send listening requests to factories. b/17393458 4576 if (nr.isListen()) continue; 4577 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4578 } 4579 } 4580 4581 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4582 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4583 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4584 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4585 networkRequest); 4586 } 4587 } 4588 4589 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4590 int notificationType) { 4591 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4592 Intent intent = new Intent(); 4593 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4594 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4595 nri.mPendingIntentSent = true; 4596 sendIntent(nri.mPendingIntent, intent); 4597 } 4598 // else not handled 4599 } 4600 4601 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4602 mPendingIntentWakeLock.acquire(); 4603 try { 4604 if (DBG) log("Sending " + pendingIntent); 4605 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4606 } catch (PendingIntent.CanceledException e) { 4607 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4608 mPendingIntentWakeLock.release(); 4609 releasePendingNetworkRequest(pendingIntent); 4610 } 4611 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4612 } 4613 4614 @Override 4615 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4616 String resultData, Bundle resultExtras) { 4617 if (DBG) log("Finished sending " + pendingIntent); 4618 mPendingIntentWakeLock.release(); 4619 // Release with a delay so the receiving client has an opportunity to put in its 4620 // own request. 4621 releasePendingNetworkRequestWithDelay(pendingIntent); 4622 } 4623 4624 private void callCallbackForRequest(NetworkRequestInfo nri, 4625 NetworkAgentInfo networkAgent, int notificationType, int arg1) { 4626 if (nri.messenger == null) return; // Default request has no msgr 4627 Bundle bundle = new Bundle(); 4628 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4629 new NetworkRequest(nri.request)); 4630 Message msg = Message.obtain(); 4631 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4632 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4633 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4634 } 4635 switch (notificationType) { 4636 case ConnectivityManager.CALLBACK_LOSING: { 4637 msg.arg1 = arg1; 4638 break; 4639 } 4640 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4641 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4642 new NetworkCapabilities(networkAgent.networkCapabilities)); 4643 break; 4644 } 4645 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4646 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4647 new LinkProperties(networkAgent.linkProperties)); 4648 break; 4649 } 4650 } 4651 msg.what = notificationType; 4652 msg.setData(bundle); 4653 try { 4654 if (VDBG) { 4655 log("sending notification " + notifyTypeToName(notificationType) + 4656 " for " + nri.request); 4657 } 4658 nri.messenger.send(msg); 4659 } catch (RemoteException e) { 4660 // may occur naturally in the race of binder death. 4661 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4662 } 4663 } 4664 4665 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4666 if (nai.numRequestNetworkRequests() != 0) { 4667 for (int i = 0; i < nai.numNetworkRequests(); i++) { 4668 NetworkRequest nr = nai.requestAt(i); 4669 // Ignore listening requests. 4670 if (nr.isListen()) continue; 4671 loge("Dead network still had at least " + nr); 4672 break; 4673 } 4674 } 4675 nai.asyncChannel.disconnect(); 4676 } 4677 4678 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4679 if (oldNetwork == null) { 4680 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4681 return; 4682 } 4683 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4684 4685 // If we get here it means that the last linger timeout for this network expired. So there 4686 // must be no other active linger timers, and we must stop lingering. 4687 oldNetwork.clearLingerState(); 4688 4689 if (unneeded(oldNetwork)) { 4690 teardownUnneededNetwork(oldNetwork); 4691 } 4692 } 4693 4694 private void makeDefault(NetworkAgentInfo newNetwork) { 4695 if (DBG) log("Switching to new default network: " + newNetwork); 4696 setupDataActivityTracking(newNetwork); 4697 try { 4698 mNetd.setDefaultNetId(newNetwork.network.netId); 4699 } catch (Exception e) { 4700 loge("Exception setting default network :" + e); 4701 } 4702 notifyLockdownVpn(newNetwork); 4703 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4704 updateTcpBufferSizes(newNetwork); 4705 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4706 } 4707 4708 // Handles a network appearing or improving its score. 4709 // 4710 // - Evaluates all current NetworkRequests that can be 4711 // satisfied by newNetwork, and reassigns to newNetwork 4712 // any such requests for which newNetwork is the best. 4713 // 4714 // - Lingers any validated Networks that as a result are no longer 4715 // needed. A network is needed if it is the best network for 4716 // one or more NetworkRequests, or if it is a VPN. 4717 // 4718 // - Tears down newNetwork if it just became validated 4719 // but turns out to be unneeded. 4720 // 4721 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4722 // networks that have no chance (i.e. even if validated) 4723 // of becoming the highest scoring network. 4724 // 4725 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4726 // it does not remove NetworkRequests that other Networks could better satisfy. 4727 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4728 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4729 // as it performs better by a factor of the number of Networks. 4730 // 4731 // @param newNetwork is the network to be matched against NetworkRequests. 4732 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4733 // performed to tear down unvalidated networks that have no chance (i.e. even if 4734 // validated) of becoming the highest scoring network. 4735 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4736 ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { 4737 if (!newNetwork.everConnected) return; 4738 boolean keep = newNetwork.isVPN(); 4739 boolean isNewDefault = false; 4740 NetworkAgentInfo oldDefaultNetwork = null; 4741 if (VDBG) log("rematching " + newNetwork.name()); 4742 // Find and migrate to this Network any NetworkRequests for 4743 // which this network is now the best. 4744 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4745 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4746 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4747 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4748 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4749 final boolean satisfies = newNetwork.satisfies(nri.request); 4750 if (newNetwork == currentNetwork && satisfies) { 4751 if (VDBG) { 4752 log("Network " + newNetwork.name() + " was already satisfying" + 4753 " request " + nri.request.requestId + ". No change."); 4754 } 4755 keep = true; 4756 continue; 4757 } 4758 4759 // check if it satisfies the NetworkCapabilities 4760 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4761 if (satisfies) { 4762 if (nri.request.isListen()) { 4763 // This is not a request, it's a callback listener. 4764 // Add it to newNetwork regardless of score. 4765 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4766 continue; 4767 } 4768 4769 // next check if it's better than any current network we're using for 4770 // this request 4771 if (VDBG) { 4772 log("currentScore = " + 4773 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4774 ", newScore = " + newNetwork.getCurrentScore()); 4775 } 4776 if (currentNetwork == null || 4777 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4778 if (VDBG) log("rematch for " + newNetwork.name()); 4779 if (currentNetwork != null) { 4780 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4781 currentNetwork.removeRequest(nri.request.requestId); 4782 currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); 4783 affectedNetworks.add(currentNetwork); 4784 } else { 4785 if (VDBG) log(" accepting network in place of null"); 4786 } 4787 newNetwork.unlingerRequest(nri.request); 4788 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4789 if (!newNetwork.addRequest(nri.request)) { 4790 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4791 } 4792 addedRequests.add(nri); 4793 keep = true; 4794 // Tell NetworkFactories about the new score, so they can stop 4795 // trying to connect if they know they cannot match it. 4796 // TODO - this could get expensive if we have alot of requests for this 4797 // network. Think about if there is a way to reduce this. Push 4798 // netid->request mapping to each factory? 4799 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4800 if (mDefaultRequest.requestId == nri.request.requestId) { 4801 isNewDefault = true; 4802 oldDefaultNetwork = currentNetwork; 4803 } 4804 } 4805 } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { 4806 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4807 // mark it as no longer satisfying "nri". Because networks are processed by 4808 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4809 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4810 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4811 // This means this code doesn't have to handle the case where "currentNetwork" no 4812 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4813 if (DBG) { 4814 log("Network " + newNetwork.name() + " stopped satisfying" + 4815 " request " + nri.request.requestId); 4816 } 4817 newNetwork.removeRequest(nri.request.requestId); 4818 if (currentNetwork == newNetwork) { 4819 mNetworkForRequestId.remove(nri.request.requestId); 4820 sendUpdatedScoreToFactories(nri.request, 0); 4821 } else { 4822 if (nri.request.isRequest()) { 4823 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4824 newNetwork.name() + 4825 " without updating mNetworkForRequestId or factories!"); 4826 } 4827 } 4828 // TODO: technically, sending CALLBACK_LOST here is 4829 // incorrect if nri is a request (not a listen) and there 4830 // is a replacement network currently connected that can 4831 // satisfy it. However, the only capability that can both 4832 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4833 // so this code is only incorrect for a network that loses 4834 // the TRUSTED capability, which is a rare case. 4835 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); 4836 } 4837 } 4838 if (isNewDefault) { 4839 // Notify system services that this network is up. 4840 makeDefault(newNetwork); 4841 // Log 0 -> X and Y -> X default network transitions, where X is the new default. 4842 logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); 4843 synchronized (ConnectivityService.this) { 4844 // have a new default network, release the transition wakelock in 4845 // a second if it's held. The second pause is to allow apps 4846 // to reconnect over the new network 4847 if (mNetTransitionWakeLock.isHeld()) { 4848 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4849 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4850 mNetTransitionWakeLockSerialNumber, 0), 4851 1000); 4852 } 4853 } 4854 } 4855 4856 // do this after the default net is switched, but 4857 // before LegacyTypeTracker sends legacy broadcasts 4858 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4859 4860 // Linger any networks that are no longer needed. This should be done after sending the 4861 // available callback for newNetwork. 4862 for (NetworkAgentInfo nai : affectedNetworks) { 4863 updateLingerState(nai, now); 4864 } 4865 // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it 4866 // does not need to be done in any particular order. 4867 updateLingerState(newNetwork, now); 4868 4869 if (isNewDefault) { 4870 // Maintain the illusion: since the legacy API only 4871 // understands one network at a time, we must pretend 4872 // that the current default network disconnected before 4873 // the new one connected. 4874 if (oldDefaultNetwork != null) { 4875 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4876 oldDefaultNetwork, true); 4877 } 4878 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4879 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4880 notifyLockdownVpn(newNetwork); 4881 } 4882 4883 if (keep) { 4884 // Notify battery stats service about this network, both the normal 4885 // interface and any stacked links. 4886 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4887 try { 4888 final IBatteryStats bs = BatteryStatsService.getService(); 4889 final int type = newNetwork.networkInfo.getType(); 4890 4891 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4892 bs.noteNetworkInterfaceType(baseIface, type); 4893 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4894 final String stackedIface = stacked.getInterfaceName(); 4895 bs.noteNetworkInterfaceType(stackedIface, type); 4896 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4897 } 4898 } catch (RemoteException ignored) { 4899 } 4900 4901 // This has to happen after the notifyNetworkCallbacks as that tickles each 4902 // ConnectivityManager instance so that legacy requests correctly bind dns 4903 // requests to this network. The legacy users are listening for this bcast 4904 // and will generally do a dns request so they can ensureRouteToHost and if 4905 // they do that before the callbacks happen they'll use the default network. 4906 // 4907 // TODO: Is there still a race here? We send the broadcast 4908 // after sending the callback, but if the app can receive the 4909 // broadcast before the callback, it might still break. 4910 // 4911 // This *does* introduce a race where if the user uses the new api 4912 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4913 // they may get old info. Reverse this after the old startUsing api is removed. 4914 // This is on top of the multiple intent sequencing referenced in the todo above. 4915 for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { 4916 NetworkRequest nr = newNetwork.requestAt(i); 4917 if (nr.legacyType != TYPE_NONE && nr.isRequest()) { 4918 // legacy type tracker filters out repeat adds 4919 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4920 } 4921 } 4922 4923 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4924 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4925 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4926 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4927 if (newNetwork.isVPN()) { 4928 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4929 } 4930 } 4931 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4932 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4933 if (unneeded(nai)) { 4934 if (nai.getLingerExpiry() > 0) { 4935 // This network has active linger timers and no requests, but is not 4936 // lingering. Linger it. 4937 // 4938 // One way (the only way?) this can happen if this network is unvalidated 4939 // and became unneeded due to another network improving its score to the 4940 // point where this network will no longer be able to satisfy any requests 4941 // even if it validates. 4942 updateLingerState(nai, now); 4943 } else { 4944 if (DBG) log("Reaping " + nai.name()); 4945 teardownUnneededNetwork(nai); 4946 } 4947 } 4948 } 4949 } 4950 } 4951 4952 /** 4953 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4954 * being disconnected. 4955 * @param changed If only one Network's score or capabilities have been modified since the last 4956 * time this function was called, pass this Network in this argument, otherwise pass 4957 * null. 4958 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4959 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4960 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4961 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4962 * network's score. 4963 */ 4964 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4965 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4966 // to avoid the slowness. It is not simply enough to process just "changed", for 4967 // example in the case where "changed"'s score decreases and another network should begin 4968 // satifying a NetworkRequest that "changed" currently satisfies. 4969 4970 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4971 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4972 // rematchNetworkAndRequests() handles. 4973 final long now = SystemClock.elapsedRealtime(); 4974 if (changed != null && oldScore < changed.getCurrentScore()) { 4975 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); 4976 } else { 4977 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4978 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4979 // Rematch higher scoring networks first to prevent requests first matching a lower 4980 // scoring network and then a higher scoring network, which could produce multiple 4981 // callbacks and inadvertently unlinger networks. 4982 Arrays.sort(nais); 4983 for (NetworkAgentInfo nai : nais) { 4984 rematchNetworkAndRequests(nai, 4985 // Only reap the last time through the loop. Reaping before all rematching 4986 // is complete could incorrectly teardown a network that hasn't yet been 4987 // rematched. 4988 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4989 : ReapUnvalidatedNetworks.REAP, 4990 now); 4991 } 4992 } 4993 } 4994 4995 private void updateInetCondition(NetworkAgentInfo nai) { 4996 // Don't bother updating until we've graduated to validated at least once. 4997 if (!nai.everValidated) return; 4998 // For now only update icons for default connection. 4999 // TODO: Update WiFi and cellular icons separately. b/17237507 5000 if (!isDefaultNetwork(nai)) return; 5001 5002 int newInetCondition = nai.lastValidated ? 100 : 0; 5003 // Don't repeat publish. 5004 if (newInetCondition == mDefaultInetConditionPublished) return; 5005 5006 mDefaultInetConditionPublished = newInetCondition; 5007 sendInetConditionBroadcast(nai.networkInfo); 5008 } 5009 5010 private void notifyLockdownVpn(NetworkAgentInfo nai) { 5011 if (mLockdownTracker != null) { 5012 if (nai != null && nai.isVPN()) { 5013 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 5014 } else { 5015 mLockdownTracker.onNetworkInfoChanged(); 5016 } 5017 } 5018 } 5019 5020 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 5021 NetworkInfo.State state = newInfo.getState(); 5022 NetworkInfo oldInfo = null; 5023 final int oldScore = networkAgent.getCurrentScore(); 5024 synchronized (networkAgent) { 5025 oldInfo = networkAgent.networkInfo; 5026 networkAgent.networkInfo = newInfo; 5027 } 5028 notifyLockdownVpn(networkAgent); 5029 5030 if (oldInfo != null && oldInfo.getState() == state) { 5031 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 5032 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 5033 notifyIfacesChangedForNetworkStats(); 5034 } else if (VDBG) log("ignoring duplicate network state non-change"); 5035 // In either case, no further work should be needed. 5036 return; 5037 } 5038 if (DBG) { 5039 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 5040 (oldInfo == null ? "null" : oldInfo.getState()) + 5041 " to " + state); 5042 } 5043 5044 if (!networkAgent.created 5045 && (state == NetworkInfo.State.CONNECTED 5046 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 5047 try { 5048 // This should never fail. Specifying an already in use NetID will cause failure. 5049 if (networkAgent.isVPN()) { 5050 mNetd.createVirtualNetwork(networkAgent.network.netId, 5051 !networkAgent.linkProperties.getDnsServers().isEmpty(), 5052 (networkAgent.networkMisc == null || 5053 !networkAgent.networkMisc.allowBypass)); 5054 } else { 5055 mNetd.createPhysicalNetwork(networkAgent.network.netId, 5056 networkAgent.networkCapabilities.hasCapability( 5057 NET_CAPABILITY_NOT_RESTRICTED) ? 5058 null : NetworkManagementService.PERMISSION_SYSTEM); 5059 } 5060 } catch (Exception e) { 5061 loge("Error creating network " + networkAgent.network.netId + ": " 5062 + e.getMessage()); 5063 return; 5064 } 5065 networkAgent.created = true; 5066 } 5067 5068 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 5069 networkAgent.everConnected = true; 5070 5071 updateLinkProperties(networkAgent, null); 5072 notifyIfacesChangedForNetworkStats(); 5073 5074 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 5075 scheduleUnvalidatedPrompt(networkAgent); 5076 5077 if (networkAgent.isVPN()) { 5078 // Temporarily disable the default proxy (not global). 5079 synchronized (mProxyLock) { 5080 if (!mDefaultProxyDisabled) { 5081 mDefaultProxyDisabled = true; 5082 if (mGlobalProxy == null && mDefaultProxy != null) { 5083 sendProxyBroadcast(null); 5084 } 5085 } 5086 } 5087 // TODO: support proxy per network. 5088 } 5089 5090 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 5091 // be communicated to a particular NetworkAgent depends only on the network's immutable, 5092 // capabilities, so it only needs to be done once on initial connect, not every time the 5093 // network's capabilities change. Note that we do this before rematching the network, 5094 // so we could decide to tear it down immediately afterwards. That's fine though - on 5095 // disconnection NetworkAgents should stop any signal strength monitoring they have been 5096 // doing. 5097 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 5098 5099 // Consider network even though it is not yet validated. 5100 final long now = SystemClock.elapsedRealtime(); 5101 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); 5102 5103 // This has to happen after matching the requests, because callbacks are just requests. 5104 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 5105 } else if (state == NetworkInfo.State.DISCONNECTED) { 5106 networkAgent.asyncChannel.disconnect(); 5107 if (networkAgent.isVPN()) { 5108 synchronized (mProxyLock) { 5109 if (mDefaultProxyDisabled) { 5110 mDefaultProxyDisabled = false; 5111 if (mGlobalProxy == null && mDefaultProxy != null) { 5112 sendProxyBroadcast(mDefaultProxy); 5113 } 5114 } 5115 } 5116 } 5117 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5118 state == NetworkInfo.State.SUSPENDED) { 5119 // going into or coming out of SUSPEND: rescore and notify 5120 if (networkAgent.getCurrentScore() != oldScore) { 5121 rematchAllNetworksAndRequests(networkAgent, oldScore); 5122 } 5123 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5124 ConnectivityManager.CALLBACK_SUSPENDED : 5125 ConnectivityManager.CALLBACK_RESUMED)); 5126 mLegacyTypeTracker.update(networkAgent); 5127 } 5128 } 5129 5130 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5131 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5132 if (score < 0) { 5133 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5134 "). Bumping score to min of 0"); 5135 score = 0; 5136 } 5137 5138 final int oldScore = nai.getCurrentScore(); 5139 nai.setCurrentScore(score); 5140 5141 rematchAllNetworksAndRequests(nai, oldScore); 5142 5143 sendUpdatedScoreToFactories(nai); 5144 } 5145 5146 // notify only this one new request of the current state 5147 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5148 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 5149 if (nri.mPendingIntent == null) { 5150 callCallbackForRequest(nri, nai, notifyType, 0); 5151 } else { 5152 sendPendingIntentForRequest(nri, nai, notifyType); 5153 } 5154 } 5155 5156 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5157 // The NetworkInfo we actually send out has no bearing on the real 5158 // state of affairs. For example, if the default connection is mobile, 5159 // and a request for HIPRI has just gone away, we need to pretend that 5160 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5161 // the state to DISCONNECTED, even though the network is of type MOBILE 5162 // and is still connected. 5163 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5164 info.setType(type); 5165 if (state != DetailedState.DISCONNECTED) { 5166 info.setDetailedState(state, null, info.getExtraInfo()); 5167 sendConnectedBroadcast(info); 5168 } else { 5169 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5170 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5171 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5172 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5173 if (info.isFailover()) { 5174 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5175 nai.networkInfo.setFailover(false); 5176 } 5177 if (info.getReason() != null) { 5178 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5179 } 5180 if (info.getExtraInfo() != null) { 5181 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5182 } 5183 NetworkAgentInfo newDefaultAgent = null; 5184 if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { 5185 newDefaultAgent = getDefaultNetwork(); 5186 if (newDefaultAgent != null) { 5187 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5188 newDefaultAgent.networkInfo); 5189 } else { 5190 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5191 } 5192 } 5193 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5194 mDefaultInetConditionPublished); 5195 sendStickyBroadcast(intent); 5196 if (newDefaultAgent != null) { 5197 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5198 } 5199 } 5200 } 5201 5202 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { 5203 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5204 for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { 5205 NetworkRequest nr = networkAgent.requestAt(i); 5206 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5207 if (VDBG) log(" sending notification for " + nr); 5208 if (nri.mPendingIntent == null) { 5209 callCallbackForRequest(nri, networkAgent, notifyType, arg1); 5210 } else { 5211 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5212 } 5213 } 5214 } 5215 5216 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5217 notifyNetworkCallbacks(networkAgent, notifyType, 0); 5218 } 5219 5220 private String notifyTypeToName(int notifyType) { 5221 switch (notifyType) { 5222 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5223 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5224 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5225 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5226 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5227 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5228 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5229 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5230 } 5231 return "UNKNOWN"; 5232 } 5233 5234 /** 5235 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5236 * properties tracked by NetworkStatsService on an active iface has changed. 5237 */ 5238 private void notifyIfacesChangedForNetworkStats() { 5239 try { 5240 mStatsService.forceUpdateIfaces(); 5241 } catch (Exception ignored) { 5242 } 5243 } 5244 5245 @Override 5246 public boolean addVpnAddress(String address, int prefixLength) { 5247 throwIfLockdownEnabled(); 5248 int user = UserHandle.getUserId(Binder.getCallingUid()); 5249 synchronized (mVpns) { 5250 return mVpns.get(user).addAddress(address, prefixLength); 5251 } 5252 } 5253 5254 @Override 5255 public boolean removeVpnAddress(String address, int prefixLength) { 5256 throwIfLockdownEnabled(); 5257 int user = UserHandle.getUserId(Binder.getCallingUid()); 5258 synchronized (mVpns) { 5259 return mVpns.get(user).removeAddress(address, prefixLength); 5260 } 5261 } 5262 5263 @Override 5264 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5265 throwIfLockdownEnabled(); 5266 int user = UserHandle.getUserId(Binder.getCallingUid()); 5267 boolean success; 5268 synchronized (mVpns) { 5269 success = mVpns.get(user).setUnderlyingNetworks(networks); 5270 } 5271 if (success) { 5272 notifyIfacesChangedForNetworkStats(); 5273 } 5274 return success; 5275 } 5276 5277 @Override 5278 public String getCaptivePortalServerUrl() { 5279 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5280 } 5281 5282 @Override 5283 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5284 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5285 enforceKeepalivePermission(); 5286 mKeepaliveTracker.startNattKeepalive( 5287 getNetworkAgentInfoForNetwork(network), 5288 intervalSeconds, messenger, binder, 5289 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5290 } 5291 5292 @Override 5293 public void stopKeepalive(Network network, int slot) { 5294 mHandler.sendMessage(mHandler.obtainMessage( 5295 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5296 } 5297 5298 @Override 5299 public void factoryReset() { 5300 enforceConnectivityInternalPermission(); 5301 5302 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5303 return; 5304 } 5305 5306 final int userId = UserHandle.getCallingUserId(); 5307 5308 // Turn airplane mode off 5309 setAirplaneMode(false); 5310 5311 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5312 // Untether 5313 for (String tether : getTetheredIfaces()) { 5314 untether(tether); 5315 } 5316 } 5317 5318 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5319 // Remove always-on package 5320 synchronized (mVpns) { 5321 final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); 5322 if (alwaysOnPackage != null) { 5323 setAlwaysOnVpnPackage(userId, null, false); 5324 setVpnPackageAuthorization(alwaysOnPackage, userId, false); 5325 } 5326 } 5327 5328 // Turn VPN off 5329 VpnConfig vpnConfig = getVpnConfig(userId); 5330 if (vpnConfig != null) { 5331 if (vpnConfig.legacy) { 5332 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5333 } else { 5334 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5335 // in the future without user intervention. 5336 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5337 5338 prepareVpn(null, VpnConfig.LEGACY_VPN, userId); 5339 } 5340 } 5341 } 5342 } 5343 5344 @VisibleForTesting 5345 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5346 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5347 return new NetworkMonitor(context, handler, nai, defaultRequest); 5348 } 5349 5350 @VisibleForTesting 5351 public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { 5352 return new WakeupMessage(c, h, s, cmd, 0, 0, obj); 5353 } 5354 5355 private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5356 int newNetid = NETID_UNSET; 5357 int prevNetid = NETID_UNSET; 5358 int[] transports = new int[0]; 5359 boolean hadIPv4 = false; 5360 boolean hadIPv6 = false; 5361 5362 if (newNai != null) { 5363 newNetid = newNai.network.netId; 5364 transports = newNai.networkCapabilities.getTransportTypes(); 5365 } 5366 if (prevNai != null) { 5367 prevNetid = prevNai.network.netId; 5368 final LinkProperties lp = prevNai.linkProperties; 5369 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5370 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5371 } 5372 5373 mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); 5374 } 5375 5376 private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { 5377 mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); 5378 } 5379} 5380