ConnectivityService.java revision cc92c6e87773df9d5a84922066716ae9bb09cd6d
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_REJECT_ALL; 33import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 34 35import android.annotation.Nullable; 36import android.app.BroadcastOptions; 37import android.app.Notification; 38import android.app.NotificationManager; 39import android.app.PendingIntent; 40import android.content.BroadcastReceiver; 41import android.content.ContentResolver; 42import android.content.Context; 43import android.content.Intent; 44import android.content.IntentFilter; 45import android.content.pm.PackageManager; 46import android.content.res.Configuration; 47import android.content.res.Resources; 48import android.database.ContentObserver; 49import android.net.ConnectivityManager; 50import android.net.ConnectivityManager.PacketKeepalive; 51import android.net.IConnectivityManager; 52import android.net.INetworkManagementEventObserver; 53import android.net.INetworkPolicyListener; 54import android.net.INetworkPolicyManager; 55import android.net.INetworkStatsService; 56import android.net.LinkProperties; 57import android.net.LinkProperties.CompareResult; 58import android.net.Network; 59import android.net.NetworkAgent; 60import android.net.NetworkCapabilities; 61import android.net.NetworkConfig; 62import android.net.NetworkInfo; 63import android.net.NetworkInfo.DetailedState; 64import android.net.NetworkMisc; 65import android.net.NetworkQuotaInfo; 66import android.net.NetworkRequest; 67import android.net.NetworkState; 68import android.net.NetworkUtils; 69import android.net.Proxy; 70import android.net.ProxyInfo; 71import android.net.RouteInfo; 72import android.net.UidRange; 73import android.net.Uri; 74import android.net.metrics.DefaultNetworkEvent; 75import android.net.metrics.NetworkEvent; 76import android.os.Binder; 77import android.os.Build; 78import android.os.Bundle; 79import android.os.FileUtils; 80import android.os.Handler; 81import android.os.HandlerThread; 82import android.os.IBinder; 83import android.os.INetworkManagementService; 84import android.os.Looper; 85import android.os.Message; 86import android.os.Messenger; 87import android.os.ParcelFileDescriptor; 88import android.os.PowerManager; 89import android.os.Process; 90import android.os.RemoteException; 91import android.os.ResultReceiver; 92import android.os.SystemProperties; 93import android.os.UserHandle; 94import android.os.UserManager; 95import android.provider.Settings; 96import android.security.Credentials; 97import android.security.KeyStore; 98import android.telephony.TelephonyManager; 99import android.text.TextUtils; 100import android.util.LocalLog; 101import android.util.LocalLog.ReadOnlyLocalLog; 102import android.util.Pair; 103import android.util.Slog; 104import android.util.SparseArray; 105import android.util.SparseBooleanArray; 106import android.util.SparseIntArray; 107import android.util.Xml; 108 109import com.android.internal.R; 110import com.android.internal.annotations.GuardedBy; 111import com.android.internal.annotations.VisibleForTesting; 112import com.android.internal.app.IBatteryStats; 113import com.android.internal.net.LegacyVpnInfo; 114import com.android.internal.net.NetworkStatsFactory; 115import com.android.internal.net.VpnConfig; 116import com.android.internal.net.VpnInfo; 117import com.android.internal.net.VpnProfile; 118import com.android.internal.util.AsyncChannel; 119import com.android.internal.util.IndentingPrintWriter; 120import com.android.internal.util.MessageUtils; 121import com.android.internal.util.XmlUtils; 122import com.android.server.am.BatteryStatsService; 123import com.android.server.connectivity.DataConnectionStats; 124import com.android.server.connectivity.KeepaliveTracker; 125import com.android.server.connectivity.NetworkDiagnostics; 126import com.android.server.connectivity.Nat464Xlat; 127import com.android.server.connectivity.NetworkAgentInfo; 128import com.android.server.connectivity.NetworkMonitor; 129import com.android.server.connectivity.PacManager; 130import com.android.server.connectivity.PermissionMonitor; 131import com.android.server.connectivity.Tethering; 132import com.android.server.connectivity.Vpn; 133import com.android.server.net.BaseNetworkObserver; 134import com.android.server.net.LockdownVpnTracker; 135import com.google.android.collect.Lists; 136import com.google.android.collect.Sets; 137 138import org.xmlpull.v1.XmlPullParser; 139import org.xmlpull.v1.XmlPullParserException; 140 141import java.io.File; 142import java.io.FileDescriptor; 143import java.io.FileNotFoundException; 144import java.io.FileReader; 145import java.io.IOException; 146import java.io.PrintWriter; 147import java.net.Inet4Address; 148import java.net.InetAddress; 149import java.net.UnknownHostException; 150import java.util.ArrayDeque; 151import java.util.ArrayList; 152import java.util.Arrays; 153import java.util.Collection; 154import java.util.HashMap; 155import java.util.HashSet; 156import java.util.SortedSet; 157import java.util.TreeSet; 158import java.util.List; 159import java.util.Map; 160import java.util.Objects; 161 162/** 163 * @hide 164 */ 165public class ConnectivityService extends IConnectivityManager.Stub 166 implements PendingIntent.OnFinished { 167 private static final String TAG = "ConnectivityService"; 168 169 private static final boolean DBG = true; 170 private static final boolean VDBG = false; 171 172 private static final boolean LOGD_RULES = false; 173 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 174 175 // TODO: create better separation between radio types and network types 176 177 // how long to wait before switching back to a radio's default network 178 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 179 // system property that can override the above value 180 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 181 "android.telephony.apn-restore"; 182 183 // How long to wait before putting up a "This network doesn't have an Internet connection, 184 // connect anyway?" dialog after the user selects a network that doesn't validate. 185 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 186 187 // How long to delay to removal of a pending intent based request. 188 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 189 private final int mReleasePendingIntentDelayMs; 190 191 private Tethering mTethering; 192 193 private final PermissionMonitor mPermissionMonitor; 194 195 private KeyStore mKeyStore; 196 197 @GuardedBy("mVpns") 198 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 199 200 private boolean mLockdownEnabled; 201 private LockdownVpnTracker mLockdownTracker; 202 203 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 204 private Object mRulesLock = new Object(); 205 /** Currently active network rules by UID. */ 206 private SparseIntArray mUidRules = new SparseIntArray(); 207 /** Set of ifaces that are costly. */ 208 private HashSet<String> mMeteredIfaces = Sets.newHashSet(); 209 210 final private Context mContext; 211 private int mNetworkPreference; 212 // 0 is full bad, 100 is full good 213 private int mDefaultInetConditionPublished = 0; 214 215 private int mNumDnsEntries; 216 217 private boolean mTestMode; 218 private static ConnectivityService sServiceInstance; 219 220 private INetworkManagementService mNetd; 221 private INetworkStatsService mStatsService; 222 private INetworkPolicyManager mPolicyManager; 223 224 private String mCurrentTcpBufferSizes; 225 226 private static final int ENABLED = 1; 227 private static final int DISABLED = 0; 228 229 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 230 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class }); 231 232 private enum ReapUnvalidatedNetworks { 233 // Tear down networks that have no chance (e.g. even if validated) of becoming 234 // the highest scoring network satisfying a NetworkRequest. This should be passed when 235 // all networks have been rematched against all NetworkRequests. 236 REAP, 237 // Don't reap networks. This should be passed when some networks have not yet been 238 // rematched against all NetworkRequests. 239 DONT_REAP 240 }; 241 242 /** 243 * used internally to change our mobile data enabled flag 244 */ 245 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 246 247 /** 248 * used internally to clear a wakelock when transitioning 249 * from one net to another. Clear happens when we get a new 250 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 251 * after a timeout if no network is found (typically 1 min). 252 */ 253 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 254 255 /** 256 * used internally to reload global proxy settings 257 */ 258 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 259 260 /** 261 * PAC manager has received new port. 262 */ 263 private static final int EVENT_PROXY_HAS_CHANGED = 16; 264 265 /** 266 * used internally when registering NetworkFactories 267 * obj = NetworkFactoryInfo 268 */ 269 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 270 271 /** 272 * used internally when registering NetworkAgents 273 * obj = Messenger 274 */ 275 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 276 277 /** 278 * used to add a network request 279 * includes a NetworkRequestInfo 280 */ 281 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 282 283 /** 284 * indicates a timeout period is over - check if we had a network yet or not 285 * and if not, call the timeout calback (but leave the request live until they 286 * cancel it. 287 * includes a NetworkRequestInfo 288 */ 289 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 290 291 /** 292 * used to add a network listener - no request 293 * includes a NetworkRequestInfo 294 */ 295 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 296 297 /** 298 * used to remove a network request, either a listener or a real request 299 * arg1 = UID of caller 300 * obj = NetworkRequest 301 */ 302 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 303 304 /** 305 * used internally when registering NetworkFactories 306 * obj = Messenger 307 */ 308 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 309 310 /** 311 * used internally to expire a wakelock when transitioning 312 * from one net to another. Expire happens when we fail to find 313 * a new network (typically after 1 minute) - 314 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 315 * a replacement network. 316 */ 317 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 318 319 /** 320 * Used internally to indicate the system is ready. 321 */ 322 private static final int EVENT_SYSTEM_READY = 25; 323 324 /** 325 * used to add a network request with a pending intent 326 * obj = NetworkRequestInfo 327 */ 328 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 329 330 /** 331 * used to remove a pending intent and its associated network request. 332 * arg1 = UID of caller 333 * obj = PendingIntent 334 */ 335 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 336 337 /** 338 * used to specify whether a network should be used even if unvalidated. 339 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 340 * arg2 = whether to remember this choice in the future (1 or 0) 341 * obj = network 342 */ 343 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 344 345 /** 346 * used to ask the user to confirm a connection to an unvalidated network. 347 * obj = network 348 */ 349 private static final int EVENT_PROMPT_UNVALIDATED = 29; 350 351 /** 352 * used internally to (re)configure mobile data always-on settings. 353 */ 354 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 355 356 /** 357 * used to add a network listener with a pending intent 358 * obj = NetworkRequestInfo 359 */ 360 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 361 362 /** Handler thread used for both of the handlers below. */ 363 @VisibleForTesting 364 protected final HandlerThread mHandlerThread; 365 /** Handler used for internal events. */ 366 final private InternalHandler mHandler; 367 /** Handler used for incoming {@link NetworkStateTracker} events. */ 368 final private NetworkStateTrackerHandler mTrackerHandler; 369 370 private boolean mSystemReady; 371 private Intent mInitialBroadcast; 372 373 private PowerManager.WakeLock mNetTransitionWakeLock; 374 private String mNetTransitionWakeLockCausedBy = ""; 375 private int mNetTransitionWakeLockSerialNumber; 376 private int mNetTransitionWakeLockTimeout; 377 private final PowerManager.WakeLock mPendingIntentWakeLock; 378 379 // used in DBG mode to track inet condition reports 380 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 381 private ArrayList mInetLog; 382 383 // track the current default http proxy - tell the world if we get a new one (real change) 384 private volatile ProxyInfo mDefaultProxy = null; 385 private Object mProxyLock = new Object(); 386 private boolean mDefaultProxyDisabled = false; 387 388 // track the global proxy. 389 private ProxyInfo mGlobalProxy = null; 390 391 private PacManager mPacManager = null; 392 393 final private SettingsObserver mSettingsObserver; 394 395 private UserManager mUserManager; 396 397 NetworkConfig[] mNetConfigs; 398 int mNetworksDefined; 399 400 // the set of network types that can only be enabled by system/sig apps 401 List mProtectedNetworks; 402 403 private DataConnectionStats mDataConnectionStats; 404 405 TelephonyManager mTelephonyManager; 406 407 private KeepaliveTracker mKeepaliveTracker; 408 409 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 410 private final static int MIN_NET_ID = 100; // some reserved marks 411 private final static int MAX_NET_ID = 65535; 412 private int mNextNetId = MIN_NET_ID; 413 414 // sequence number of NetworkRequests 415 private int mNextNetworkRequestId = 1; 416 417 // NetworkRequest activity String log entries. 418 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 419 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 420 421 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 422 private static final int MAX_VALIDATION_LOGS = 10; 423 private final ArrayDeque<Pair<Network,ReadOnlyLocalLog>> mValidationLogs = 424 new ArrayDeque<Pair<Network,ReadOnlyLocalLog>>(MAX_VALIDATION_LOGS); 425 426 private void addValidationLogs(ReadOnlyLocalLog log, Network network) { 427 synchronized(mValidationLogs) { 428 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 429 mValidationLogs.removeLast(); 430 } 431 mValidationLogs.addFirst(new Pair(network, log)); 432 } 433 } 434 435 /** 436 * Implements support for the legacy "one network per network type" model. 437 * 438 * We used to have a static array of NetworkStateTrackers, one for each 439 * network type, but that doesn't work any more now that we can have, 440 * for example, more that one wifi network. This class stores all the 441 * NetworkAgentInfo objects that support a given type, but the legacy 442 * API will only see the first one. 443 * 444 * It serves two main purposes: 445 * 446 * 1. Provide information about "the network for a given type" (since this 447 * API only supports one). 448 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 449 * the first network for a given type changes, or if the default network 450 * changes. 451 */ 452 private class LegacyTypeTracker { 453 454 private static final boolean DBG = true; 455 private static final boolean VDBG = false; 456 457 /** 458 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 459 * Each list holds references to all NetworkAgentInfos that are used to 460 * satisfy requests for that network type. 461 * 462 * This array is built out at startup such that an unsupported network 463 * doesn't get an ArrayList instance, making this a tristate: 464 * unsupported, supported but not active and active. 465 * 466 * The actual lists are populated when we scan the network types that 467 * are supported on this device. 468 */ 469 private ArrayList<NetworkAgentInfo> mTypeLists[]; 470 471 public LegacyTypeTracker() { 472 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 473 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 474 } 475 476 public void addSupportedType(int type) { 477 if (mTypeLists[type] != null) { 478 throw new IllegalStateException( 479 "legacy list for type " + type + "already initialized"); 480 } 481 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 482 } 483 484 public boolean isTypeSupported(int type) { 485 return isNetworkTypeValid(type) && mTypeLists[type] != null; 486 } 487 488 public NetworkAgentInfo getNetworkForType(int type) { 489 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 490 return mTypeLists[type].get(0); 491 } else { 492 return null; 493 } 494 } 495 496 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 497 boolean isDefaultNetwork) { 498 if (DBG) { 499 log("Sending " + state + 500 " broadcast for type " + type + " " + nai.name() + 501 " isDefaultNetwork=" + isDefaultNetwork); 502 } 503 } 504 505 /** Adds the given network to the specified legacy type list. */ 506 public void add(int type, NetworkAgentInfo nai) { 507 if (!isTypeSupported(type)) { 508 return; // Invalid network type. 509 } 510 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 511 512 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 513 if (list.contains(nai)) { 514 return; 515 } 516 517 list.add(nai); 518 519 // Send a broadcast if this is the first network of its type or if it's the default. 520 final boolean isDefaultNetwork = isDefaultNetwork(nai); 521 if (list.size() == 1 || isDefaultNetwork) { 522 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 523 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 524 } 525 } 526 527 /** Removes the given network from the specified legacy type list. */ 528 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 529 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 530 if (list == null || list.isEmpty()) { 531 return; 532 } 533 534 final boolean wasFirstNetwork = list.get(0).equals(nai); 535 536 if (!list.remove(nai)) { 537 return; 538 } 539 540 final DetailedState state = DetailedState.DISCONNECTED; 541 542 if (wasFirstNetwork || wasDefault) { 543 maybeLogBroadcast(nai, state, type, wasDefault); 544 sendLegacyNetworkBroadcast(nai, state, type); 545 } 546 547 if (!list.isEmpty() && wasFirstNetwork) { 548 if (DBG) log("Other network available for type " + type + 549 ", sending connected broadcast"); 550 final NetworkAgentInfo replacement = list.get(0); 551 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 552 sendLegacyNetworkBroadcast(replacement, state, type); 553 } 554 } 555 556 /** Removes the given network from all legacy type lists. */ 557 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 558 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 559 for (int type = 0; type < mTypeLists.length; type++) { 560 remove(type, nai, wasDefault); 561 } 562 } 563 564 // send out another legacy broadcast - currently only used for suspend/unsuspend 565 // toggle 566 public void update(NetworkAgentInfo nai) { 567 final boolean isDefault = isDefaultNetwork(nai); 568 final DetailedState state = nai.networkInfo.getDetailedState(); 569 for (int type = 0; type < mTypeLists.length; type++) { 570 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 571 final boolean contains = (list != null && list.contains(nai)); 572 final boolean isFirst = (list != null && list.size() > 0 && nai == list.get(0)); 573 if (isFirst || (contains && isDefault)) { 574 maybeLogBroadcast(nai, state, type, isDefault); 575 sendLegacyNetworkBroadcast(nai, state, type); 576 } 577 } 578 } 579 580 private String naiToString(NetworkAgentInfo nai) { 581 String name = (nai != null) ? nai.name() : "null"; 582 String state = (nai.networkInfo != null) ? 583 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 584 "???/???"; 585 return name + " " + state; 586 } 587 588 public void dump(IndentingPrintWriter pw) { 589 pw.println("mLegacyTypeTracker:"); 590 pw.increaseIndent(); 591 pw.print("Supported types:"); 592 for (int type = 0; type < mTypeLists.length; type++) { 593 if (mTypeLists[type] != null) pw.print(" " + type); 594 } 595 pw.println(); 596 pw.println("Current state:"); 597 pw.increaseIndent(); 598 for (int type = 0; type < mTypeLists.length; type++) { 599 if (mTypeLists[type] == null|| mTypeLists[type].size() == 0) continue; 600 for (NetworkAgentInfo nai : mTypeLists[type]) { 601 pw.println(type + " " + naiToString(nai)); 602 } 603 } 604 pw.decreaseIndent(); 605 pw.decreaseIndent(); 606 pw.println(); 607 } 608 } 609 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 610 611 @VisibleForTesting 612 protected HandlerThread createHandlerThread() { 613 return new HandlerThread("ConnectivityServiceThread"); 614 } 615 616 public ConnectivityService(Context context, INetworkManagementService netManager, 617 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 618 if (DBG) log("ConnectivityService starting up"); 619 620 mDefaultRequest = createInternetRequestForTransport(-1); 621 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, 622 new Binder(), NetworkRequestType.REQUEST); 623 mNetworkRequests.put(mDefaultRequest, defaultNRI); 624 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 625 626 mDefaultMobileDataRequest = createInternetRequestForTransport( 627 NetworkCapabilities.TRANSPORT_CELLULAR); 628 629 mHandlerThread = createHandlerThread(); 630 mHandlerThread.start(); 631 mHandler = new InternalHandler(mHandlerThread.getLooper()); 632 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 633 634 // setup our unique device name 635 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 636 String id = Settings.Secure.getString(context.getContentResolver(), 637 Settings.Secure.ANDROID_ID); 638 if (id != null && id.length() > 0) { 639 String name = new String("android-").concat(id); 640 SystemProperties.set("net.hostname", name); 641 } 642 } 643 644 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 645 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 646 647 mContext = checkNotNull(context, "missing Context"); 648 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 649 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 650 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 651 mKeyStore = KeyStore.getInstance(); 652 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 653 654 try { 655 mPolicyManager.registerListener(mPolicyListener); 656 } catch (RemoteException e) { 657 // ouch, no rules updates means some processes may never get network 658 loge("unable to register INetworkPolicyListener" + e.toString()); 659 } 660 661 final PowerManager powerManager = (PowerManager) context.getSystemService( 662 Context.POWER_SERVICE); 663 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 664 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 665 com.android.internal.R.integer.config_networkTransitionTimeout); 666 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 667 668 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 669 670 // TODO: What is the "correct" way to do determine if this is a wifi only device? 671 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 672 log("wifiOnly=" + wifiOnly); 673 String[] naStrings = context.getResources().getStringArray( 674 com.android.internal.R.array.networkAttributes); 675 for (String naString : naStrings) { 676 try { 677 NetworkConfig n = new NetworkConfig(naString); 678 if (VDBG) log("naString=" + naString + " config=" + n); 679 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 680 loge("Error in networkAttributes - ignoring attempt to define type " + 681 n.type); 682 continue; 683 } 684 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 685 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 686 n.type); 687 continue; 688 } 689 if (mNetConfigs[n.type] != null) { 690 loge("Error in networkAttributes - ignoring attempt to redefine type " + 691 n.type); 692 continue; 693 } 694 mLegacyTypeTracker.addSupportedType(n.type); 695 696 mNetConfigs[n.type] = n; 697 mNetworksDefined++; 698 } catch(Exception e) { 699 // ignore it - leave the entry null 700 } 701 } 702 703 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 704 if (mNetConfigs[TYPE_VPN] == null) { 705 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 706 // don't need to add TYPE_VPN to mNetConfigs. 707 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 708 mNetworksDefined++; // used only in the log() statement below. 709 } 710 711 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 712 713 mProtectedNetworks = new ArrayList<Integer>(); 714 int[] protectedNetworks = context.getResources().getIntArray( 715 com.android.internal.R.array.config_protectedNetworks); 716 for (int p : protectedNetworks) { 717 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 718 mProtectedNetworks.add(p); 719 } else { 720 if (DBG) loge("Ignoring protectedNetwork " + p); 721 } 722 } 723 724 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 725 && SystemProperties.get("ro.build.type").equals("eng"); 726 727 mTethering = new Tethering(mContext, mNetd, statsService); 728 729 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 730 731 //set up the listener for user state for creating user VPNs 732 IntentFilter intentFilter = new IntentFilter(); 733 intentFilter.addAction(Intent.ACTION_USER_STARTING); 734 intentFilter.addAction(Intent.ACTION_USER_STOPPING); 735 intentFilter.addAction(Intent.ACTION_USER_ADDED); 736 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 737 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 738 mContext.registerReceiverAsUser( 739 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 740 741 try { 742 mNetd.registerObserver(mTethering); 743 mNetd.registerObserver(mDataActivityObserver); 744 } catch (RemoteException e) { 745 loge("Error registering observer :" + e); 746 } 747 748 if (DBG) { 749 mInetLog = new ArrayList(); 750 } 751 752 mSettingsObserver = new SettingsObserver(mContext, mHandler); 753 registerSettingsCallbacks(); 754 755 mDataConnectionStats = new DataConnectionStats(mContext); 756 mDataConnectionStats.startMonitoring(); 757 758 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 759 760 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 761 762 mKeepaliveTracker = new KeepaliveTracker(mHandler); 763 } 764 765 private NetworkRequest createInternetRequestForTransport(int transportType) { 766 NetworkCapabilities netCap = new NetworkCapabilities(); 767 netCap.addCapability(NET_CAPABILITY_INTERNET); 768 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 769 if (transportType > -1) { 770 netCap.addTransportType(transportType); 771 } 772 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 773 } 774 775 private void handleMobileDataAlwaysOn() { 776 final boolean enable = (Settings.Global.getInt( 777 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 778 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 779 if (enable == isEnabled) { 780 return; // Nothing to do. 781 } 782 783 if (enable) { 784 handleRegisterNetworkRequest(new NetworkRequestInfo( 785 null, mDefaultMobileDataRequest, new Binder(), NetworkRequestType.REQUEST)); 786 } else { 787 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 788 } 789 } 790 791 private void registerSettingsCallbacks() { 792 // Watch for global HTTP proxy changes. 793 mSettingsObserver.observe( 794 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 795 EVENT_APPLY_GLOBAL_HTTP_PROXY); 796 797 // Watch for whether or not to keep mobile data always on. 798 mSettingsObserver.observe( 799 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 800 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 801 } 802 803 private synchronized int nextNetworkRequestId() { 804 return mNextNetworkRequestId++; 805 } 806 807 @VisibleForTesting 808 protected int reserveNetId() { 809 synchronized (mNetworkForNetId) { 810 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 811 int netId = mNextNetId; 812 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 813 // Make sure NetID unused. http://b/16815182 814 if (!mNetIdInUse.get(netId)) { 815 mNetIdInUse.put(netId, true); 816 return netId; 817 } 818 } 819 } 820 throw new IllegalStateException("No free netIds"); 821 } 822 823 private NetworkState getFilteredNetworkState(int networkType, int uid) { 824 NetworkInfo info = null; 825 LinkProperties lp = null; 826 NetworkCapabilities nc = null; 827 Network network = null; 828 String subscriberId = null; 829 830 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 831 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 832 if (nai != null) { 833 synchronized (nai) { 834 info = new NetworkInfo(nai.networkInfo); 835 lp = new LinkProperties(nai.linkProperties); 836 nc = new NetworkCapabilities(nai.networkCapabilities); 837 // Network objects are outwardly immutable so there is no point to duplicating. 838 // Duplicating also precludes sharing socket factories and connection pools. 839 network = nai.network; 840 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 841 } 842 info.setType(networkType); 843 } else { 844 info = new NetworkInfo(networkType, 0, getNetworkTypeName(networkType), ""); 845 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 846 info.setIsAvailable(true); 847 lp = new LinkProperties(); 848 nc = new NetworkCapabilities(); 849 network = null; 850 } 851 info = getFilteredNetworkInfo(info, lp, uid); 852 } 853 854 return new NetworkState(info, lp, nc, network, subscriberId, null); 855 } 856 857 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 858 if (network == null) { 859 return null; 860 } 861 synchronized (mNetworkForNetId) { 862 return mNetworkForNetId.get(network.netId); 863 } 864 }; 865 866 private Network[] getVpnUnderlyingNetworks(int uid) { 867 if (!mLockdownEnabled) { 868 int user = UserHandle.getUserId(uid); 869 synchronized (mVpns) { 870 Vpn vpn = mVpns.get(user); 871 if (vpn != null && vpn.appliesToUid(uid)) { 872 return vpn.getUnderlyingNetworks(); 873 } 874 } 875 } 876 return null; 877 } 878 879 private NetworkState getUnfilteredActiveNetworkState(int uid) { 880 NetworkInfo info = null; 881 LinkProperties lp = null; 882 NetworkCapabilities nc = null; 883 Network network = null; 884 String subscriberId = null; 885 886 NetworkAgentInfo nai = getDefaultNetwork(); 887 888 final Network[] networks = getVpnUnderlyingNetworks(uid); 889 if (networks != null) { 890 // getUnderlyingNetworks() returns: 891 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 892 // empty array => the VPN explicitly said "no default network". 893 // non-empty array => the VPN specified one or more default networks; we use the 894 // first one. 895 if (networks.length > 0) { 896 nai = getNetworkAgentInfoForNetwork(networks[0]); 897 } else { 898 nai = null; 899 } 900 } 901 902 if (nai != null) { 903 synchronized (nai) { 904 info = new NetworkInfo(nai.networkInfo); 905 lp = new LinkProperties(nai.linkProperties); 906 nc = new NetworkCapabilities(nai.networkCapabilities); 907 // Network objects are outwardly immutable so there is no point to duplicating. 908 // Duplicating also precludes sharing socket factories and connection pools. 909 network = nai.network; 910 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 911 } 912 } 913 914 return new NetworkState(info, lp, nc, network, subscriberId, null); 915 } 916 917 /** 918 * Check if UID should be blocked from using the network with the given LinkProperties. 919 */ 920 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 921 final boolean networkCostly; 922 final int uidRules; 923 924 final String iface = (lp == null ? "" : lp.getInterfaceName()); 925 synchronized (mRulesLock) { 926 networkCostly = mMeteredIfaces.contains(iface); 927 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 928 } 929 930 if (uidRules == RULE_REJECT_ALL) { 931 return true; 932 } else if ((uidRules == RULE_REJECT_METERED) && networkCostly) { 933 return true; 934 } else { 935 return false; 936 } 937 } 938 939 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 940 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) return; 941 boolean removed = false; 942 boolean added = false; 943 synchronized (mBlockedAppUids) { 944 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 945 added = true; 946 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 947 removed = true; 948 } 949 } 950 if (added) log("Returning blocked NetworkInfo to uid=" + uid); 951 else if (removed) log("Returning unblocked NetworkInfo to uid=" + uid); 952 } 953 954 /** 955 * Return a filtered {@link NetworkInfo}, potentially marked 956 * {@link DetailedState#BLOCKED} based on 957 * {@link #isNetworkWithLinkPropertiesBlocked}. 958 */ 959 private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, LinkProperties lp, int uid) { 960 if (info != null && isNetworkWithLinkPropertiesBlocked(lp, uid)) { 961 // network is blocked; clone and override state 962 info = new NetworkInfo(info); 963 info.setDetailedState(DetailedState.BLOCKED, null, null); 964 } 965 if (info != null && mLockdownTracker != null) { 966 info = mLockdownTracker.augmentNetworkInfo(info); 967 if (VDBG) log("returning Locked NetworkInfo"); 968 } 969 return info; 970 } 971 972 /** 973 * Return NetworkInfo for the active (i.e., connected) network interface. 974 * It is assumed that at most one network is active at a time. If more 975 * than one is active, it is indeterminate which will be returned. 976 * @return the info for the active network, or {@code null} if none is 977 * active 978 */ 979 @Override 980 public NetworkInfo getActiveNetworkInfo() { 981 enforceAccessPermission(); 982 final int uid = Binder.getCallingUid(); 983 NetworkState state = getUnfilteredActiveNetworkState(uid); 984 NetworkInfo ni = getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 985 maybeLogBlockedNetworkInfo(ni, uid); 986 return ni; 987 } 988 989 @Override 990 public Network getActiveNetwork() { 991 enforceAccessPermission(); 992 return getActiveNetworkForUidInternal(Binder.getCallingUid()); 993 } 994 995 @Override 996 public Network getActiveNetworkForUid(int uid) { 997 enforceConnectivityInternalPermission(); 998 return getActiveNetworkForUidInternal(uid); 999 } 1000 1001 private Network getActiveNetworkForUidInternal(final int uid) { 1002 final int user = UserHandle.getUserId(uid); 1003 int vpnNetId = NETID_UNSET; 1004 synchronized (mVpns) { 1005 final Vpn vpn = mVpns.get(user); 1006 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1007 } 1008 NetworkAgentInfo nai; 1009 if (vpnNetId != NETID_UNSET) { 1010 synchronized (mNetworkForNetId) { 1011 nai = mNetworkForNetId.get(vpnNetId); 1012 } 1013 if (nai != null) return nai.network; 1014 } 1015 nai = getDefaultNetwork(); 1016 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 1017 return nai != null ? nai.network : null; 1018 } 1019 1020 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1021 enforceAccessPermission(); 1022 final int uid = Binder.getCallingUid(); 1023 NetworkState state = getUnfilteredActiveNetworkState(uid); 1024 return state.networkInfo; 1025 } 1026 1027 @Override 1028 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 1029 enforceConnectivityInternalPermission(); 1030 NetworkState state = getUnfilteredActiveNetworkState(uid); 1031 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1032 } 1033 1034 @Override 1035 public NetworkInfo getNetworkInfo(int networkType) { 1036 enforceAccessPermission(); 1037 final int uid = Binder.getCallingUid(); 1038 if (getVpnUnderlyingNetworks(uid) != null) { 1039 // A VPN is active, so we may need to return one of its underlying networks. This 1040 // information is not available in LegacyTypeTracker, so we have to get it from 1041 // getUnfilteredActiveNetworkState. 1042 NetworkState state = getUnfilteredActiveNetworkState(uid); 1043 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1044 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1045 } 1046 } 1047 NetworkState state = getFilteredNetworkState(networkType, uid); 1048 return state.networkInfo; 1049 } 1050 1051 @Override 1052 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1053 enforceAccessPermission(); 1054 final int uid = Binder.getCallingUid(); 1055 NetworkInfo info = null; 1056 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1057 if (nai != null) { 1058 synchronized (nai) { 1059 info = new NetworkInfo(nai.networkInfo); 1060 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1061 } 1062 } 1063 return info; 1064 } 1065 1066 @Override 1067 public NetworkInfo[] getAllNetworkInfo() { 1068 enforceAccessPermission(); 1069 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1070 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1071 networkType++) { 1072 NetworkInfo info = getNetworkInfo(networkType); 1073 if (info != null) { 1074 result.add(info); 1075 } 1076 } 1077 return result.toArray(new NetworkInfo[result.size()]); 1078 } 1079 1080 @Override 1081 public Network getNetworkForType(int networkType) { 1082 enforceAccessPermission(); 1083 final int uid = Binder.getCallingUid(); 1084 NetworkState state = getFilteredNetworkState(networkType, uid); 1085 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1086 return state.network; 1087 } 1088 return null; 1089 } 1090 1091 @Override 1092 public Network[] getAllNetworks() { 1093 enforceAccessPermission(); 1094 synchronized (mNetworkForNetId) { 1095 final Network[] result = new Network[mNetworkForNetId.size()]; 1096 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1097 result[i] = mNetworkForNetId.valueAt(i).network; 1098 } 1099 return result; 1100 } 1101 } 1102 1103 @Override 1104 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1105 // The basic principle is: if an app's traffic could possibly go over a 1106 // network, without the app doing anything multinetwork-specific, 1107 // (hence, by "default"), then include that network's capabilities in 1108 // the array. 1109 // 1110 // In the normal case, app traffic only goes over the system's default 1111 // network connection, so that's the only network returned. 1112 // 1113 // With a VPN in force, some app traffic may go into the VPN, and thus 1114 // over whatever underlying networks the VPN specifies, while other app 1115 // traffic may go over the system default network (e.g.: a split-tunnel 1116 // VPN, or an app disallowed by the VPN), so the set of networks 1117 // returned includes the VPN's underlying networks and the system 1118 // default. 1119 enforceAccessPermission(); 1120 1121 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1122 1123 NetworkAgentInfo nai = getDefaultNetwork(); 1124 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1125 if (nc != null) { 1126 result.put(nai.network, nc); 1127 } 1128 1129 if (!mLockdownEnabled) { 1130 synchronized (mVpns) { 1131 Vpn vpn = mVpns.get(userId); 1132 if (vpn != null) { 1133 Network[] networks = vpn.getUnderlyingNetworks(); 1134 if (networks != null) { 1135 for (Network network : networks) { 1136 nai = getNetworkAgentInfoForNetwork(network); 1137 nc = getNetworkCapabilitiesInternal(nai); 1138 if (nc != null) { 1139 result.put(network, nc); 1140 } 1141 } 1142 } 1143 } 1144 } 1145 } 1146 1147 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1148 out = result.values().toArray(out); 1149 return out; 1150 } 1151 1152 @Override 1153 public boolean isNetworkSupported(int networkType) { 1154 enforceAccessPermission(); 1155 return mLegacyTypeTracker.isTypeSupported(networkType); 1156 } 1157 1158 /** 1159 * Return LinkProperties for the active (i.e., connected) default 1160 * network interface. It is assumed that at most one default network 1161 * is active at a time. If more than one is active, it is indeterminate 1162 * which will be returned. 1163 * @return the ip properties for the active network, or {@code null} if 1164 * none is active 1165 */ 1166 @Override 1167 public LinkProperties getActiveLinkProperties() { 1168 enforceAccessPermission(); 1169 final int uid = Binder.getCallingUid(); 1170 NetworkState state = getUnfilteredActiveNetworkState(uid); 1171 return state.linkProperties; 1172 } 1173 1174 @Override 1175 public LinkProperties getLinkPropertiesForType(int networkType) { 1176 enforceAccessPermission(); 1177 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1178 if (nai != null) { 1179 synchronized (nai) { 1180 return new LinkProperties(nai.linkProperties); 1181 } 1182 } 1183 return null; 1184 } 1185 1186 // TODO - this should be ALL networks 1187 @Override 1188 public LinkProperties getLinkProperties(Network network) { 1189 enforceAccessPermission(); 1190 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1191 if (nai != null) { 1192 synchronized (nai) { 1193 return new LinkProperties(nai.linkProperties); 1194 } 1195 } 1196 return null; 1197 } 1198 1199 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1200 if (nai != null) { 1201 synchronized (nai) { 1202 if (nai.networkCapabilities != null) { 1203 return new NetworkCapabilities(nai.networkCapabilities); 1204 } 1205 } 1206 } 1207 return null; 1208 } 1209 1210 @Override 1211 public NetworkCapabilities getNetworkCapabilities(Network network) { 1212 enforceAccessPermission(); 1213 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1214 } 1215 1216 @Override 1217 public NetworkState[] getAllNetworkState() { 1218 // Require internal since we're handing out IMSI details 1219 enforceConnectivityInternalPermission(); 1220 1221 final ArrayList<NetworkState> result = Lists.newArrayList(); 1222 for (Network network : getAllNetworks()) { 1223 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1224 if (nai != null) { 1225 synchronized (nai) { 1226 final String subscriberId = (nai.networkMisc != null) 1227 ? nai.networkMisc.subscriberId : null; 1228 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1229 nai.networkCapabilities, network, subscriberId, null)); 1230 } 1231 } 1232 } 1233 return result.toArray(new NetworkState[result.size()]); 1234 } 1235 1236 @Override 1237 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1238 enforceAccessPermission(); 1239 final int uid = Binder.getCallingUid(); 1240 final long token = Binder.clearCallingIdentity(); 1241 try { 1242 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1243 if (state.networkInfo != null) { 1244 try { 1245 return mPolicyManager.getNetworkQuotaInfo(state); 1246 } catch (RemoteException e) { 1247 } 1248 } 1249 return null; 1250 } finally { 1251 Binder.restoreCallingIdentity(token); 1252 } 1253 } 1254 1255 @Override 1256 public boolean isActiveNetworkMetered() { 1257 enforceAccessPermission(); 1258 final int uid = Binder.getCallingUid(); 1259 final long token = Binder.clearCallingIdentity(); 1260 try { 1261 return isActiveNetworkMeteredUnchecked(uid); 1262 } finally { 1263 Binder.restoreCallingIdentity(token); 1264 } 1265 } 1266 1267 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1268 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1269 if (state.networkInfo != null) { 1270 try { 1271 return mPolicyManager.isNetworkMetered(state); 1272 } catch (RemoteException e) { 1273 } 1274 } 1275 return false; 1276 } 1277 1278 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1279 @Override 1280 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1281 int deviceType = Integer.parseInt(label); 1282 sendDataActivityBroadcast(deviceType, active, tsNanos); 1283 } 1284 }; 1285 1286 /** 1287 * Ensure that a network route exists to deliver traffic to the specified 1288 * host via the specified network interface. 1289 * @param networkType the type of the network over which traffic to the 1290 * specified host is to be routed 1291 * @param hostAddress the IP address of the host to which the route is 1292 * desired 1293 * @return {@code true} on success, {@code false} on failure 1294 */ 1295 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1296 enforceChangePermission(); 1297 if (mProtectedNetworks.contains(networkType)) { 1298 enforceConnectivityInternalPermission(); 1299 } 1300 1301 InetAddress addr; 1302 try { 1303 addr = InetAddress.getByAddress(hostAddress); 1304 } catch (UnknownHostException e) { 1305 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1306 return false; 1307 } 1308 1309 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1310 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1311 return false; 1312 } 1313 1314 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1315 if (nai == null) { 1316 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1317 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1318 } else { 1319 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1320 } 1321 return false; 1322 } 1323 1324 DetailedState netState; 1325 synchronized (nai) { 1326 netState = nai.networkInfo.getDetailedState(); 1327 } 1328 1329 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1330 if (VDBG) { 1331 log("requestRouteToHostAddress on down network " 1332 + "(" + networkType + ") - dropped" 1333 + " netState=" + netState); 1334 } 1335 return false; 1336 } 1337 1338 final int uid = Binder.getCallingUid(); 1339 final long token = Binder.clearCallingIdentity(); 1340 try { 1341 LinkProperties lp; 1342 int netId; 1343 synchronized (nai) { 1344 lp = nai.linkProperties; 1345 netId = nai.network.netId; 1346 } 1347 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1348 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1349 return ok; 1350 } finally { 1351 Binder.restoreCallingIdentity(token); 1352 } 1353 } 1354 1355 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1356 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1357 if (bestRoute == null) { 1358 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1359 } else { 1360 String iface = bestRoute.getInterface(); 1361 if (bestRoute.getGateway().equals(addr)) { 1362 // if there is no better route, add the implied hostroute for our gateway 1363 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1364 } else { 1365 // if we will connect to this through another route, add a direct route 1366 // to it's gateway 1367 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1368 } 1369 } 1370 if (DBG) log("Adding legacy route " + bestRoute + 1371 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1372 try { 1373 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1374 } catch (Exception e) { 1375 // never crash - catch them all 1376 if (DBG) loge("Exception trying to add a route: " + e); 1377 return false; 1378 } 1379 return true; 1380 } 1381 1382 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1383 @Override 1384 public void onUidRulesChanged(int uid, int uidRules) { 1385 // caller is NPMS, since we only register with them 1386 if (LOGD_RULES) { 1387 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1388 } 1389 1390 synchronized (mRulesLock) { 1391 // skip update when we've already applied rules 1392 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1393 if (oldRules == uidRules) return; 1394 1395 mUidRules.put(uid, uidRules); 1396 } 1397 1398 // TODO: notify UID when it has requested targeted updates 1399 } 1400 1401 @Override 1402 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1403 // caller is NPMS, since we only register with them 1404 if (LOGD_RULES) { 1405 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1406 } 1407 1408 synchronized (mRulesLock) { 1409 mMeteredIfaces.clear(); 1410 for (String iface : meteredIfaces) { 1411 mMeteredIfaces.add(iface); 1412 } 1413 } 1414 } 1415 1416 @Override 1417 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1418 // caller is NPMS, since we only register with them 1419 if (LOGD_RULES) { 1420 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1421 } 1422 } 1423 1424 @Override 1425 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1426 if (LOGD_RULES) { 1427 // caller is NPMS, since we only register with them 1428 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1429 + whitelisted + ")"); 1430 } 1431 } 1432 }; 1433 1434 /** 1435 * Require that the caller is either in the same user or has appropriate permission to interact 1436 * across users. 1437 * 1438 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1439 */ 1440 private void enforceCrossUserPermission(int userId) { 1441 if (userId == UserHandle.getCallingUserId()) { 1442 // Not a cross-user call. 1443 return; 1444 } 1445 mContext.enforceCallingOrSelfPermission( 1446 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1447 "ConnectivityService"); 1448 } 1449 1450 private void enforceInternetPermission() { 1451 mContext.enforceCallingOrSelfPermission( 1452 android.Manifest.permission.INTERNET, 1453 "ConnectivityService"); 1454 } 1455 1456 private void enforceAccessPermission() { 1457 mContext.enforceCallingOrSelfPermission( 1458 android.Manifest.permission.ACCESS_NETWORK_STATE, 1459 "ConnectivityService"); 1460 } 1461 1462 private void enforceChangePermission() { 1463 ConnectivityManager.enforceChangePermission(mContext); 1464 } 1465 1466 private void enforceTetherAccessPermission() { 1467 mContext.enforceCallingOrSelfPermission( 1468 android.Manifest.permission.ACCESS_NETWORK_STATE, 1469 "ConnectivityService"); 1470 } 1471 1472 private void enforceConnectivityInternalPermission() { 1473 mContext.enforceCallingOrSelfPermission( 1474 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1475 "ConnectivityService"); 1476 } 1477 1478 private void enforceKeepalivePermission() { 1479 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1480 } 1481 1482 public void sendConnectedBroadcast(NetworkInfo info) { 1483 enforceConnectivityInternalPermission(); 1484 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1485 } 1486 1487 private void sendInetConditionBroadcast(NetworkInfo info) { 1488 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1489 } 1490 1491 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1492 if (mLockdownTracker != null) { 1493 info = mLockdownTracker.augmentNetworkInfo(info); 1494 } 1495 1496 Intent intent = new Intent(bcastType); 1497 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1498 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1499 if (info.isFailover()) { 1500 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1501 info.setFailover(false); 1502 } 1503 if (info.getReason() != null) { 1504 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1505 } 1506 if (info.getExtraInfo() != null) { 1507 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1508 info.getExtraInfo()); 1509 } 1510 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1511 return intent; 1512 } 1513 1514 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1515 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1516 } 1517 1518 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1519 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1520 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1521 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1522 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1523 final long ident = Binder.clearCallingIdentity(); 1524 try { 1525 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1526 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1527 } finally { 1528 Binder.restoreCallingIdentity(ident); 1529 } 1530 } 1531 1532 private void sendStickyBroadcast(Intent intent) { 1533 synchronized(this) { 1534 if (!mSystemReady) { 1535 mInitialBroadcast = new Intent(intent); 1536 } 1537 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1538 if (VDBG) { 1539 log("sendStickyBroadcast: action=" + intent.getAction()); 1540 } 1541 1542 Bundle options = null; 1543 final long ident = Binder.clearCallingIdentity(); 1544 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1545 final NetworkInfo ni = intent.getParcelableExtra( 1546 ConnectivityManager.EXTRA_NETWORK_INFO); 1547 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1548 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1549 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1550 } else { 1551 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1552 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1553 options = opts.toBundle(); 1554 } 1555 final IBatteryStats bs = BatteryStatsService.getService(); 1556 try { 1557 bs.noteConnectivityChanged(intent.getIntExtra( 1558 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1559 ni != null ? ni.getState().toString() : "?"); 1560 } catch (RemoteException e) { 1561 } 1562 } 1563 try { 1564 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1565 } finally { 1566 Binder.restoreCallingIdentity(ident); 1567 } 1568 } 1569 } 1570 1571 void systemReady() { 1572 loadGlobalProxy(); 1573 1574 synchronized(this) { 1575 mSystemReady = true; 1576 if (mInitialBroadcast != null) { 1577 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1578 mInitialBroadcast = null; 1579 } 1580 } 1581 // load the global proxy at startup 1582 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1583 1584 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1585 // for user to unlock device too. 1586 updateLockdownVpn(); 1587 1588 // Configure whether mobile data is always on. 1589 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1590 1591 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1592 1593 mPermissionMonitor.startMonitoring(); 1594 } 1595 1596 /** 1597 * Setup data activity tracking for the given network. 1598 * 1599 * Every {@code setupDataActivityTracking} should be paired with a 1600 * {@link #removeDataActivityTracking} for cleanup. 1601 */ 1602 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1603 final String iface = networkAgent.linkProperties.getInterfaceName(); 1604 1605 final int timeout; 1606 int type = ConnectivityManager.TYPE_NONE; 1607 1608 if (networkAgent.networkCapabilities.hasTransport( 1609 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1610 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1611 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1612 10); 1613 type = ConnectivityManager.TYPE_MOBILE; 1614 } else if (networkAgent.networkCapabilities.hasTransport( 1615 NetworkCapabilities.TRANSPORT_WIFI)) { 1616 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1617 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1618 15); 1619 type = ConnectivityManager.TYPE_WIFI; 1620 } else { 1621 // do not track any other networks 1622 timeout = 0; 1623 } 1624 1625 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1626 try { 1627 mNetd.addIdleTimer(iface, timeout, type); 1628 } catch (Exception e) { 1629 // You shall not crash! 1630 loge("Exception in setupDataActivityTracking " + e); 1631 } 1632 } 1633 } 1634 1635 /** 1636 * Remove data activity tracking when network disconnects. 1637 */ 1638 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1639 final String iface = networkAgent.linkProperties.getInterfaceName(); 1640 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1641 1642 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1643 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1644 try { 1645 // the call fails silently if no idletimer setup for this interface 1646 mNetd.removeIdleTimer(iface); 1647 } catch (Exception e) { 1648 loge("Exception in removeDataActivityTracking " + e); 1649 } 1650 } 1651 } 1652 1653 /** 1654 * Reads the network specific MTU size from reources. 1655 * and set it on it's iface. 1656 */ 1657 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1658 final String iface = newLp.getInterfaceName(); 1659 final int mtu = newLp.getMtu(); 1660 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1661 if (VDBG) log("identical MTU - not setting"); 1662 return; 1663 } 1664 1665 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1666 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1667 return; 1668 } 1669 1670 // Cannot set MTU without interface name 1671 if (TextUtils.isEmpty(iface)) { 1672 loge("Setting MTU size with null iface."); 1673 return; 1674 } 1675 1676 try { 1677 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1678 mNetd.setMtu(iface, mtu); 1679 } catch (Exception e) { 1680 Slog.e(TAG, "exception in setMtu()" + e); 1681 } 1682 } 1683 1684 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1685 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1686 1687 // Overridden for testing purposes to avoid writing to SystemProperties. 1688 @VisibleForTesting 1689 protected int getDefaultTcpRwnd() { 1690 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1691 } 1692 1693 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1694 if (isDefaultNetwork(nai) == false) { 1695 return; 1696 } 1697 1698 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1699 String[] values = null; 1700 if (tcpBufferSizes != null) { 1701 values = tcpBufferSizes.split(","); 1702 } 1703 1704 if (values == null || values.length != 6) { 1705 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1706 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1707 values = tcpBufferSizes.split(","); 1708 } 1709 1710 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1711 1712 try { 1713 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1714 1715 final String prefix = "/sys/kernel/ipv4/tcp_"; 1716 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1717 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1718 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1719 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1720 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1721 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1722 mCurrentTcpBufferSizes = tcpBufferSizes; 1723 } catch (IOException e) { 1724 loge("Can't set TCP buffer sizes:" + e); 1725 } 1726 1727 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1728 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1729 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1730 if (rwndValue != 0) { 1731 SystemProperties.set(sysctlKey, rwndValue.toString()); 1732 } 1733 } 1734 1735 private void flushVmDnsCache() { 1736 /* 1737 * Tell the VMs to toss their DNS caches 1738 */ 1739 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1740 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1741 /* 1742 * Connectivity events can happen before boot has completed ... 1743 */ 1744 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1745 final long ident = Binder.clearCallingIdentity(); 1746 try { 1747 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1748 } finally { 1749 Binder.restoreCallingIdentity(ident); 1750 } 1751 } 1752 1753 @Override 1754 public int getRestoreDefaultNetworkDelay(int networkType) { 1755 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1756 NETWORK_RESTORE_DELAY_PROP_NAME); 1757 if(restoreDefaultNetworkDelayStr != null && 1758 restoreDefaultNetworkDelayStr.length() != 0) { 1759 try { 1760 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1761 } catch (NumberFormatException e) { 1762 } 1763 } 1764 // if the system property isn't set, use the value for the apn type 1765 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1766 1767 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1768 (mNetConfigs[networkType] != null)) { 1769 ret = mNetConfigs[networkType].restoreTime; 1770 } 1771 return ret; 1772 } 1773 1774 private boolean argsContain(String[] args, String target) { 1775 for (String arg : args) { 1776 if (arg.equals(target)) return true; 1777 } 1778 return false; 1779 } 1780 1781 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1782 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1783 final long DIAG_TIME_MS = 5000; 1784 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1785 // Start gathering diagnostic information. 1786 netDiags.add(new NetworkDiagnostics( 1787 nai.network, 1788 new LinkProperties(nai.linkProperties), // Must be a copy. 1789 DIAG_TIME_MS)); 1790 } 1791 1792 for (NetworkDiagnostics netDiag : netDiags) { 1793 pw.println(); 1794 netDiag.waitForMeasurements(); 1795 netDiag.dump(pw); 1796 } 1797 } 1798 1799 @Override 1800 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1801 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1802 if (mContext.checkCallingOrSelfPermission( 1803 android.Manifest.permission.DUMP) 1804 != PackageManager.PERMISSION_GRANTED) { 1805 pw.println("Permission Denial: can't dump ConnectivityService " + 1806 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1807 Binder.getCallingUid()); 1808 return; 1809 } 1810 1811 if (argsContain(args, "--diag")) { 1812 dumpNetworkDiagnostics(pw); 1813 return; 1814 } 1815 1816 pw.print("NetworkFactories for:"); 1817 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1818 pw.print(" " + nfi.name); 1819 } 1820 pw.println(); 1821 pw.println(); 1822 1823 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1824 pw.print("Active default network: "); 1825 if (defaultNai == null) { 1826 pw.println("none"); 1827 } else { 1828 pw.println(defaultNai.network.netId); 1829 } 1830 pw.println(); 1831 1832 pw.println("Current Networks:"); 1833 pw.increaseIndent(); 1834 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1835 pw.println(nai.toString()); 1836 pw.increaseIndent(); 1837 pw.println("Requests:"); 1838 pw.increaseIndent(); 1839 for (int i = 0; i < nai.networkRequests.size(); i++) { 1840 pw.println(nai.networkRequests.valueAt(i).toString()); 1841 } 1842 pw.decreaseIndent(); 1843 pw.println("Lingered:"); 1844 pw.increaseIndent(); 1845 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1846 pw.decreaseIndent(); 1847 pw.decreaseIndent(); 1848 } 1849 pw.decreaseIndent(); 1850 pw.println(); 1851 1852 pw.println("Network Requests:"); 1853 pw.increaseIndent(); 1854 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1855 pw.println(nri.toString()); 1856 } 1857 pw.println(); 1858 pw.decreaseIndent(); 1859 1860 mLegacyTypeTracker.dump(pw); 1861 1862 synchronized (this) { 1863 pw.print("mNetTransitionWakeLock: currently " + 1864 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1865 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1866 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1867 } else { 1868 pw.println(", last requested never"); 1869 } 1870 } 1871 1872 pw.println(); 1873 mTethering.dump(fd, pw, args); 1874 1875 pw.println(); 1876 mKeepaliveTracker.dump(pw); 1877 1878 pw.println(); 1879 1880 if (mInetLog != null && mInetLog.size() > 0) { 1881 pw.println(); 1882 pw.println("Inet condition reports:"); 1883 pw.increaseIndent(); 1884 for(int i = 0; i < mInetLog.size(); i++) { 1885 pw.println(mInetLog.get(i)); 1886 } 1887 pw.decreaseIndent(); 1888 } 1889 1890 if (argsContain(args, "--short") == false) { 1891 pw.println(); 1892 synchronized (mValidationLogs) { 1893 pw.println("mValidationLogs (most recent first):"); 1894 for (Pair<Network,ReadOnlyLocalLog> p : mValidationLogs) { 1895 pw.println(p.first); 1896 pw.increaseIndent(); 1897 p.second.dump(fd, pw, args); 1898 pw.decreaseIndent(); 1899 } 1900 } 1901 1902 pw.println(); 1903 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1904 pw.increaseIndent(); 1905 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1906 pw.decreaseIndent(); 1907 } 1908 } 1909 1910 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 1911 if (nai.network == null) return false; 1912 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1913 if (officialNai != null && officialNai.equals(nai)) return true; 1914 if (officialNai != null || VDBG) { 1915 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 1916 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1917 " - " + nai); 1918 } 1919 return false; 1920 } 1921 1922 private boolean isRequest(NetworkRequest request) { 1923 return mNetworkRequests.get(request).isRequest(); 1924 } 1925 1926 // must be stateless - things change under us. 1927 private class NetworkStateTrackerHandler extends Handler { 1928 public NetworkStateTrackerHandler(Looper looper) { 1929 super(looper); 1930 } 1931 1932 private boolean maybeHandleAsyncChannelMessage(Message msg) { 1933 switch (msg.what) { 1934 default: 1935 return false; 1936 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1937 handleAsyncChannelHalfConnect(msg); 1938 break; 1939 } 1940 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1941 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1942 if (nai != null) nai.asyncChannel.disconnect(); 1943 break; 1944 } 1945 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1946 handleAsyncChannelDisconnected(msg); 1947 break; 1948 } 1949 } 1950 return true; 1951 } 1952 1953 private void maybeHandleNetworkAgentMessage(Message msg) { 1954 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1955 if (nai == null) { 1956 if (VDBG) { 1957 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 1958 log(String.format("%s from unknown NetworkAgent", what)); 1959 } 1960 return; 1961 } 1962 1963 switch (msg.what) { 1964 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1965 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 1966 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 1967 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 1968 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 1969 } 1970 if (nai.created && !nai.networkCapabilities.equalImmutableCapabilities( 1971 networkCapabilities)) { 1972 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 1973 + nai.networkCapabilities + " -> " + networkCapabilities); 1974 } 1975 updateCapabilities(nai, networkCapabilities); 1976 break; 1977 } 1978 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1979 if (VDBG) { 1980 log("Update of LinkProperties for " + nai.name() + 1981 "; created=" + nai.created); 1982 } 1983 LinkProperties oldLp = nai.linkProperties; 1984 synchronized (nai) { 1985 nai.linkProperties = (LinkProperties)msg.obj; 1986 } 1987 if (nai.created) updateLinkProperties(nai, oldLp); 1988 break; 1989 } 1990 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1991 NetworkInfo info = (NetworkInfo) msg.obj; 1992 updateNetworkInfo(nai, info); 1993 break; 1994 } 1995 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1996 Integer score = (Integer) msg.obj; 1997 if (score != null) updateNetworkScore(nai, score.intValue()); 1998 break; 1999 } 2000 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2001 try { 2002 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2003 } catch (Exception e) { 2004 // Never crash! 2005 loge("Exception in addVpnUidRanges: " + e); 2006 } 2007 break; 2008 } 2009 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2010 try { 2011 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2012 } catch (Exception e) { 2013 // Never crash! 2014 loge("Exception in removeVpnUidRanges: " + e); 2015 } 2016 break; 2017 } 2018 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2019 if (nai.created && !nai.networkMisc.explicitlySelected) { 2020 loge("ERROR: created network explicitly selected."); 2021 } 2022 nai.networkMisc.explicitlySelected = true; 2023 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2024 break; 2025 } 2026 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2027 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2028 break; 2029 } 2030 } 2031 } 2032 2033 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2034 switch (msg.what) { 2035 default: 2036 return false; 2037 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2038 final NetworkAgentInfo nai; 2039 synchronized (mNetworkForNetId) { 2040 nai = mNetworkForNetId.get(msg.arg2); 2041 } 2042 if (nai != null) { 2043 final boolean valid = 2044 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2045 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2046 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2047 if (valid != nai.lastValidated) { 2048 final int oldScore = nai.getCurrentScore(); 2049 nai.lastValidated = valid; 2050 nai.everValidated |= valid; 2051 updateCapabilities(nai, nai.networkCapabilities); 2052 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2053 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2054 } 2055 updateInetCondition(nai); 2056 // Let the NetworkAgent know the state of its network 2057 Bundle redirectUrlBundle = new Bundle(); 2058 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2059 nai.asyncChannel.sendMessage( 2060 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2061 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2062 0, redirectUrlBundle); 2063 } 2064 break; 2065 } 2066 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 2067 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2068 if (isLiveNetworkAgent(nai, msg.what)) { 2069 handleLingerComplete(nai); 2070 } 2071 break; 2072 } 2073 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2074 final int netId = msg.arg2; 2075 final boolean visible = (msg.arg1 != 0); 2076 final NetworkAgentInfo nai; 2077 synchronized (mNetworkForNetId) { 2078 nai = mNetworkForNetId.get(netId); 2079 } 2080 // If captive portal status has changed, update capabilities. 2081 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2082 nai.lastCaptivePortalDetected = visible; 2083 nai.everCaptivePortalDetected |= visible; 2084 updateCapabilities(nai, nai.networkCapabilities); 2085 } 2086 if (!visible) { 2087 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2088 } else { 2089 if (nai == null) { 2090 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2091 break; 2092 } 2093 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2094 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2095 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2096 } 2097 break; 2098 } 2099 } 2100 return true; 2101 } 2102 2103 @Override 2104 public void handleMessage(Message msg) { 2105 if (!maybeHandleAsyncChannelMessage(msg) && !maybeHandleNetworkMonitorMessage(msg)) { 2106 maybeHandleNetworkAgentMessage(msg); 2107 } 2108 } 2109 } 2110 2111 private void linger(NetworkAgentInfo nai) { 2112 nai.lingering = true; 2113 NetworkEvent.logEvent(nai.network.netId, NetworkEvent.NETWORK_LINGER); 2114 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 2115 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 2116 } 2117 2118 // Cancel any lingering so the linger timeout doesn't teardown a network. 2119 // This should be called when a network begins satisfying a NetworkRequest. 2120 // Note: depending on what state the NetworkMonitor is in (e.g., 2121 // if it's awaiting captive portal login, or if validation failed), this 2122 // may trigger a re-evaluation of the network. 2123 private void unlinger(NetworkAgentInfo nai) { 2124 nai.networkLingered.clear(); 2125 if (!nai.lingering) return; 2126 nai.lingering = false; 2127 NetworkEvent.logEvent(nai.network.netId, NetworkEvent.NETWORK_UNLINGER); 2128 if (VDBG) log("Canceling linger of " + nai.name()); 2129 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2130 } 2131 2132 private void handleAsyncChannelHalfConnect(Message msg) { 2133 AsyncChannel ac = (AsyncChannel) msg.obj; 2134 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2135 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2136 if (VDBG) log("NetworkFactory connected"); 2137 // A network factory has connected. Send it all current NetworkRequests. 2138 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2139 if (!nri.isRequest()) continue; 2140 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2141 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2142 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2143 } 2144 } else { 2145 loge("Error connecting NetworkFactory"); 2146 mNetworkFactoryInfos.remove(msg.obj); 2147 } 2148 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2149 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2150 if (VDBG) log("NetworkAgent connected"); 2151 // A network agent has requested a connection. Establish the connection. 2152 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2153 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2154 } else { 2155 loge("Error connecting NetworkAgent"); 2156 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2157 if (nai != null) { 2158 final boolean wasDefault = isDefaultNetwork(nai); 2159 synchronized (mNetworkForNetId) { 2160 mNetworkForNetId.remove(nai.network.netId); 2161 mNetIdInUse.delete(nai.network.netId); 2162 } 2163 // Just in case. 2164 mLegacyTypeTracker.remove(nai, wasDefault); 2165 } 2166 } 2167 } 2168 } 2169 2170 private void handleAsyncChannelDisconnected(Message msg) { 2171 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2172 if (nai != null) { 2173 if (DBG) { 2174 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2175 } 2176 // A network agent has disconnected. 2177 // TODO - if we move the logic to the network agent (have them disconnect 2178 // because they lost all their requests or because their score isn't good) 2179 // then they would disconnect organically, report their new state and then 2180 // disconnect the channel. 2181 if (nai.networkInfo.isConnected()) { 2182 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2183 null, null); 2184 } 2185 final boolean wasDefault = isDefaultNetwork(nai); 2186 if (wasDefault) { 2187 mDefaultInetConditionPublished = 0; 2188 } 2189 notifyIfacesChangedForNetworkStats(); 2190 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2191 // by other networks that are already connected. Perhaps that can be done by 2192 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2193 // of rematchAllNetworksAndRequests 2194 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2195 mKeepaliveTracker.handleStopAllKeepalives(nai, 2196 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2197 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2198 mNetworkAgentInfos.remove(msg.replyTo); 2199 updateClat(null, nai.linkProperties, nai); 2200 synchronized (mNetworkForNetId) { 2201 // Remove the NetworkAgent, but don't mark the netId as 2202 // available until we've told netd to delete it below. 2203 mNetworkForNetId.remove(nai.network.netId); 2204 } 2205 // Remove all previously satisfied requests. 2206 for (int i = 0; i < nai.networkRequests.size(); i++) { 2207 NetworkRequest request = nai.networkRequests.valueAt(i); 2208 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2209 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2210 mNetworkForRequestId.remove(request.requestId); 2211 sendUpdatedScoreToFactories(request, 0); 2212 } 2213 } 2214 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2215 removeDataActivityTracking(nai); 2216 notifyLockdownVpn(nai); 2217 requestNetworkTransitionWakelock(nai.name()); 2218 } 2219 mLegacyTypeTracker.remove(nai, wasDefault); 2220 rematchAllNetworksAndRequests(null, 0); 2221 if (wasDefault && getDefaultNetwork() == null) { 2222 // Log that we lost the default network and there is no replacement. 2223 logDefaultNetworkEvent(null, nai); 2224 } 2225 if (nai.created) { 2226 // Tell netd to clean up the configuration for this network 2227 // (routing rules, DNS, etc). 2228 // This may be slow as it requires a lot of netd shelling out to ip and 2229 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2230 // after we've rematched networks with requests which should make a potential 2231 // fallback network the default or requested a new network from the 2232 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2233 // long time. 2234 try { 2235 mNetd.removeNetwork(nai.network.netId); 2236 } catch (Exception e) { 2237 loge("Exception removing network: " + e); 2238 } 2239 } 2240 synchronized (mNetworkForNetId) { 2241 mNetIdInUse.delete(nai.network.netId); 2242 } 2243 } else { 2244 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2245 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2246 } 2247 } 2248 2249 // If this method proves to be too slow then we can maintain a separate 2250 // pendingIntent => NetworkRequestInfo map. 2251 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2252 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2253 Intent intent = pendingIntent.getIntent(); 2254 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2255 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2256 if (existingPendingIntent != null && 2257 existingPendingIntent.getIntent().filterEquals(intent)) { 2258 return entry.getValue(); 2259 } 2260 } 2261 return null; 2262 } 2263 2264 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2265 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2266 2267 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2268 if (existingRequest != null) { // remove the existing request. 2269 if (DBG) log("Replacing " + existingRequest.request + " with " 2270 + nri.request + " because their intents matched."); 2271 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2272 } 2273 handleRegisterNetworkRequest(nri); 2274 } 2275 2276 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2277 mNetworkRequests.put(nri.request, nri); 2278 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2279 if (!nri.isRequest()) { 2280 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2281 if (nri.request.networkCapabilities.hasSignalStrength() && 2282 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2283 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2284 } 2285 } 2286 } 2287 rematchAllNetworksAndRequests(null, 0); 2288 if (nri.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2289 sendUpdatedScoreToFactories(nri.request, 0); 2290 } 2291 } 2292 2293 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2294 int callingUid) { 2295 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2296 if (nri != null) { 2297 handleReleaseNetworkRequest(nri.request, callingUid); 2298 } 2299 } 2300 2301 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2302 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2303 // would it have a chance of satisfying any NetworkRequests. 2304 private boolean unneeded(NetworkAgentInfo nai) { 2305 if (!nai.created || nai.isVPN() || nai.lingering) return false; 2306 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2307 // If this Network is already the highest scoring Network for a request, or if 2308 // there is hope for it to become one if it validated, then it is needed. 2309 if (nri.isRequest() && nai.satisfies(nri.request) && 2310 (nai.networkRequests.get(nri.request.requestId) != null || 2311 // Note that this catches two important cases: 2312 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2313 // is currently satisfying the request. This is desirable when 2314 // cellular ends up validating but WiFi does not. 2315 // 2. Unvalidated WiFi will not be reaped when validated cellular 2316 // is currently satisfying the request. This is desirable when 2317 // WiFi ends up validating and out scoring cellular. 2318 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2319 nai.getCurrentScoreAsValidated())) { 2320 return false; 2321 } 2322 } 2323 return true; 2324 } 2325 2326 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2327 NetworkRequestInfo nri = mNetworkRequests.get(request); 2328 if (nri != null) { 2329 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2330 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2331 return; 2332 } 2333 if (VDBG || (DBG && nri.isRequest())) log("releasing NetworkRequest " + request); 2334 nri.unlinkDeathRecipient(); 2335 mNetworkRequests.remove(request); 2336 synchronized (mUidToNetworkRequestCount) { 2337 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2338 if (requests < 1) { 2339 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2340 nri.mUid); 2341 } else if (requests == 1) { 2342 mUidToNetworkRequestCount.removeAt( 2343 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2344 } else { 2345 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2346 } 2347 } 2348 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2349 if (nri.isRequest()) { 2350 // Find all networks that are satisfying this request and remove the request 2351 // from their request lists. 2352 // TODO - it's my understanding that for a request there is only a single 2353 // network satisfying it, so this loop is wasteful 2354 boolean wasKept = false; 2355 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2356 if (nai.networkRequests.get(nri.request.requestId) != null) { 2357 nai.networkRequests.remove(nri.request.requestId); 2358 if (VDBG) { 2359 log(" Removing from current network " + nai.name() + 2360 ", leaving " + nai.networkRequests.size() + 2361 " requests."); 2362 } 2363 if (unneeded(nai)) { 2364 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2365 teardownUnneededNetwork(nai); 2366 } else { 2367 // suspect there should only be one pass through here 2368 // but if any were kept do the check below 2369 wasKept |= true; 2370 } 2371 } 2372 } 2373 2374 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2375 if (nai != null) { 2376 mNetworkForRequestId.remove(nri.request.requestId); 2377 } 2378 // Maintain the illusion. When this request arrived, we might have pretended 2379 // that a network connected to serve it, even though the network was already 2380 // connected. Now that this request has gone away, we might have to pretend 2381 // that the network disconnected. LegacyTypeTracker will generate that 2382 // phantom disconnect for this type. 2383 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2384 boolean doRemove = true; 2385 if (wasKept) { 2386 // check if any of the remaining requests for this network are for the 2387 // same legacy type - if so, don't remove the nai 2388 for (int i = 0; i < nai.networkRequests.size(); i++) { 2389 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2390 if (otherRequest.legacyType == nri.request.legacyType && 2391 isRequest(otherRequest)) { 2392 if (DBG) log(" still have other legacy request - leaving"); 2393 doRemove = false; 2394 } 2395 } 2396 } 2397 2398 if (doRemove) { 2399 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2400 } 2401 } 2402 2403 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2404 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2405 nri.request); 2406 } 2407 } else { 2408 // listens don't have a singular affectedNetwork. Check all networks to see 2409 // if this listen request applies and remove it. 2410 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2411 nai.networkRequests.remove(nri.request.requestId); 2412 if (nri.request.networkCapabilities.hasSignalStrength() && 2413 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2414 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2415 } 2416 } 2417 } 2418 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2419 } 2420 } 2421 2422 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2423 enforceConnectivityInternalPermission(); 2424 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2425 accept ? 1 : 0, always ? 1: 0, network)); 2426 } 2427 2428 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2429 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2430 " accept=" + accept + " always=" + always); 2431 2432 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2433 if (nai == null) { 2434 // Nothing to do. 2435 return; 2436 } 2437 2438 if (nai.everValidated) { 2439 // The network validated while the dialog box was up. Take no action. 2440 return; 2441 } 2442 2443 if (!nai.networkMisc.explicitlySelected) { 2444 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2445 } 2446 2447 if (accept != nai.networkMisc.acceptUnvalidated) { 2448 int oldScore = nai.getCurrentScore(); 2449 nai.networkMisc.acceptUnvalidated = accept; 2450 rematchAllNetworksAndRequests(nai, oldScore); 2451 sendUpdatedScoreToFactories(nai); 2452 } 2453 2454 if (always) { 2455 nai.asyncChannel.sendMessage( 2456 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2457 } 2458 2459 if (!accept) { 2460 // Tell the NetworkAgent to not automatically reconnect to the network. 2461 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2462 // Teardown the nework. 2463 teardownUnneededNetwork(nai); 2464 } 2465 2466 } 2467 2468 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2469 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2470 mHandler.sendMessageDelayed( 2471 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2472 PROMPT_UNVALIDATED_DELAY_MS); 2473 } 2474 2475 private void handlePromptUnvalidated(Network network) { 2476 if (VDBG) log("handlePromptUnvalidated " + network); 2477 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2478 2479 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2480 // we haven't already been told to switch to it regardless of whether it validated or not. 2481 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2482 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2483 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2484 return; 2485 } 2486 2487 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2488 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2489 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2490 intent.setClassName("com.android.settings", 2491 "com.android.settings.wifi.WifiNoInternetDialog"); 2492 2493 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2494 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2495 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2496 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2497 } 2498 2499 private class InternalHandler extends Handler { 2500 public InternalHandler(Looper looper) { 2501 super(looper); 2502 } 2503 2504 @Override 2505 public void handleMessage(Message msg) { 2506 switch (msg.what) { 2507 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2508 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2509 String causedBy = null; 2510 synchronized (ConnectivityService.this) { 2511 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2512 mNetTransitionWakeLock.isHeld()) { 2513 mNetTransitionWakeLock.release(); 2514 causedBy = mNetTransitionWakeLockCausedBy; 2515 } else { 2516 break; 2517 } 2518 } 2519 if (VDBG) { 2520 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2521 log("Failed to find a new network - expiring NetTransition Wakelock"); 2522 } else { 2523 log("NetTransition Wakelock (" + 2524 (causedBy == null ? "unknown" : causedBy) + 2525 " cleared because we found a replacement network"); 2526 } 2527 } 2528 break; 2529 } 2530 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2531 handleDeprecatedGlobalHttpProxy(); 2532 break; 2533 } 2534 case EVENT_PROXY_HAS_CHANGED: { 2535 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2536 break; 2537 } 2538 case EVENT_REGISTER_NETWORK_FACTORY: { 2539 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2540 break; 2541 } 2542 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2543 handleUnregisterNetworkFactory((Messenger)msg.obj); 2544 break; 2545 } 2546 case EVENT_REGISTER_NETWORK_AGENT: { 2547 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2548 break; 2549 } 2550 case EVENT_REGISTER_NETWORK_REQUEST: 2551 case EVENT_REGISTER_NETWORK_LISTENER: { 2552 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2553 break; 2554 } 2555 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2556 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2557 handleRegisterNetworkRequestWithIntent(msg); 2558 break; 2559 } 2560 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2561 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2562 break; 2563 } 2564 case EVENT_RELEASE_NETWORK_REQUEST: { 2565 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2566 break; 2567 } 2568 case EVENT_SET_ACCEPT_UNVALIDATED: { 2569 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2570 break; 2571 } 2572 case EVENT_PROMPT_UNVALIDATED: { 2573 handlePromptUnvalidated((Network) msg.obj); 2574 break; 2575 } 2576 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2577 handleMobileDataAlwaysOn(); 2578 break; 2579 } 2580 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2581 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2582 mKeepaliveTracker.handleStartKeepalive(msg); 2583 break; 2584 } 2585 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2586 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2587 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2588 int slot = msg.arg1; 2589 int reason = msg.arg2; 2590 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2591 break; 2592 } 2593 case EVENT_SYSTEM_READY: { 2594 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2595 nai.networkMonitor.systemReady = true; 2596 } 2597 break; 2598 } 2599 } 2600 } 2601 } 2602 2603 // javadoc from interface 2604 public int tether(String iface) { 2605 ConnectivityManager.enforceTetherChangePermission(mContext); 2606 if (isTetheringSupported()) { 2607 return mTethering.tether(iface); 2608 } else { 2609 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2610 } 2611 } 2612 2613 // javadoc from interface 2614 public int untether(String iface) { 2615 ConnectivityManager.enforceTetherChangePermission(mContext); 2616 2617 if (isTetheringSupported()) { 2618 return mTethering.untether(iface); 2619 } else { 2620 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2621 } 2622 } 2623 2624 // javadoc from interface 2625 public int getLastTetherError(String iface) { 2626 enforceTetherAccessPermission(); 2627 2628 if (isTetheringSupported()) { 2629 return mTethering.getLastTetherError(iface); 2630 } else { 2631 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2632 } 2633 } 2634 2635 // TODO - proper iface API for selection by property, inspection, etc 2636 public String[] getTetherableUsbRegexs() { 2637 enforceTetherAccessPermission(); 2638 if (isTetheringSupported()) { 2639 return mTethering.getTetherableUsbRegexs(); 2640 } else { 2641 return new String[0]; 2642 } 2643 } 2644 2645 public String[] getTetherableWifiRegexs() { 2646 enforceTetherAccessPermission(); 2647 if (isTetheringSupported()) { 2648 return mTethering.getTetherableWifiRegexs(); 2649 } else { 2650 return new String[0]; 2651 } 2652 } 2653 2654 public String[] getTetherableBluetoothRegexs() { 2655 enforceTetherAccessPermission(); 2656 if (isTetheringSupported()) { 2657 return mTethering.getTetherableBluetoothRegexs(); 2658 } else { 2659 return new String[0]; 2660 } 2661 } 2662 2663 public int setUsbTethering(boolean enable) { 2664 ConnectivityManager.enforceTetherChangePermission(mContext); 2665 if (isTetheringSupported()) { 2666 return mTethering.setUsbTethering(enable); 2667 } else { 2668 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2669 } 2670 } 2671 2672 // TODO - move iface listing, queries, etc to new module 2673 // javadoc from interface 2674 public String[] getTetherableIfaces() { 2675 enforceTetherAccessPermission(); 2676 return mTethering.getTetherableIfaces(); 2677 } 2678 2679 public String[] getTetheredIfaces() { 2680 enforceTetherAccessPermission(); 2681 return mTethering.getTetheredIfaces(); 2682 } 2683 2684 public String[] getTetheringErroredIfaces() { 2685 enforceTetherAccessPermission(); 2686 return mTethering.getErroredIfaces(); 2687 } 2688 2689 public String[] getTetheredDhcpRanges() { 2690 enforceConnectivityInternalPermission(); 2691 return mTethering.getTetheredDhcpRanges(); 2692 } 2693 2694 // if ro.tether.denied = true we default to no tethering 2695 // gservices could set the secure setting to 1 though to enable it on a build where it 2696 // had previously been turned off. 2697 @Override 2698 public boolean isTetheringSupported() { 2699 enforceTetherAccessPermission(); 2700 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2701 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2702 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2703 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2704 return tetherEnabledInSettings && mUserManager.isAdminUser() && 2705 ((mTethering.getTetherableUsbRegexs().length != 0 || 2706 mTethering.getTetherableWifiRegexs().length != 0 || 2707 mTethering.getTetherableBluetoothRegexs().length != 0) && 2708 mTethering.getUpstreamIfaceTypes().length != 0); 2709 } 2710 2711 @Override 2712 public void startTethering(int type, ResultReceiver receiver, 2713 boolean showProvisioningUi) { 2714 ConnectivityManager.enforceTetherChangePermission(mContext); 2715 if (!isTetheringSupported()) { 2716 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 2717 return; 2718 } 2719 mTethering.startTethering(type, receiver, showProvisioningUi); 2720 } 2721 2722 @Override 2723 public void stopTethering(int type) { 2724 ConnectivityManager.enforceTetherChangePermission(mContext); 2725 mTethering.stopTethering(type); 2726 } 2727 2728 // Called when we lose the default network and have no replacement yet. 2729 // This will automatically be cleared after X seconds or a new default network 2730 // becomes CONNECTED, whichever happens first. The timer is started by the 2731 // first caller and not restarted by subsequent callers. 2732 private void requestNetworkTransitionWakelock(String forWhom) { 2733 int serialNum = 0; 2734 synchronized (this) { 2735 if (mNetTransitionWakeLock.isHeld()) return; 2736 serialNum = ++mNetTransitionWakeLockSerialNumber; 2737 mNetTransitionWakeLock.acquire(); 2738 mNetTransitionWakeLockCausedBy = forWhom; 2739 } 2740 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2741 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2742 mNetTransitionWakeLockTimeout); 2743 return; 2744 } 2745 2746 // 100 percent is full good, 0 is full bad. 2747 public void reportInetCondition(int networkType, int percentage) { 2748 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2749 if (nai == null) return; 2750 reportNetworkConnectivity(nai.network, percentage > 50); 2751 } 2752 2753 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2754 enforceAccessPermission(); 2755 enforceInternetPermission(); 2756 2757 NetworkAgentInfo nai; 2758 if (network == null) { 2759 nai = getDefaultNetwork(); 2760 } else { 2761 nai = getNetworkAgentInfoForNetwork(network); 2762 } 2763 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2764 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2765 return; 2766 } 2767 // Revalidate if the app report does not match our current validated state. 2768 if (hasConnectivity == nai.lastValidated) return; 2769 final int uid = Binder.getCallingUid(); 2770 if (DBG) { 2771 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2772 ") by " + uid); 2773 } 2774 synchronized (nai) { 2775 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2776 // which isn't meant to work on uncreated networks. 2777 if (!nai.created) return; 2778 2779 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2780 2781 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2782 } 2783 } 2784 2785 private ProxyInfo getDefaultProxy() { 2786 // this information is already available as a world read/writable jvm property 2787 // so this API change wouldn't have a benifit. It also breaks the passing 2788 // of proxy info to all the JVMs. 2789 // enforceAccessPermission(); 2790 synchronized (mProxyLock) { 2791 ProxyInfo ret = mGlobalProxy; 2792 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2793 return ret; 2794 } 2795 } 2796 2797 public ProxyInfo getProxyForNetwork(Network network) { 2798 if (network == null) return getDefaultProxy(); 2799 final ProxyInfo globalProxy = getGlobalProxy(); 2800 if (globalProxy != null) return globalProxy; 2801 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 2802 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 2803 // caller may not have. 2804 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2805 if (nai == null) return null; 2806 synchronized (nai) { 2807 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 2808 if (proxyInfo == null) return null; 2809 return new ProxyInfo(proxyInfo); 2810 } 2811 } 2812 2813 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2814 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2815 // proxy is null then there is no proxy in place). 2816 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2817 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2818 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2819 proxy = null; 2820 } 2821 return proxy; 2822 } 2823 2824 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2825 // better for determining if a new proxy broadcast is necessary: 2826 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2827 // avoid unnecessary broadcasts. 2828 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2829 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2830 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2831 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2832 // all set. 2833 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2834 a = canonicalizeProxyInfo(a); 2835 b = canonicalizeProxyInfo(b); 2836 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2837 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2838 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2839 } 2840 2841 public void setGlobalProxy(ProxyInfo proxyProperties) { 2842 enforceConnectivityInternalPermission(); 2843 2844 synchronized (mProxyLock) { 2845 if (proxyProperties == mGlobalProxy) return; 2846 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2847 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2848 2849 String host = ""; 2850 int port = 0; 2851 String exclList = ""; 2852 String pacFileUrl = ""; 2853 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2854 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2855 if (!proxyProperties.isValid()) { 2856 if (DBG) 2857 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2858 return; 2859 } 2860 mGlobalProxy = new ProxyInfo(proxyProperties); 2861 host = mGlobalProxy.getHost(); 2862 port = mGlobalProxy.getPort(); 2863 exclList = mGlobalProxy.getExclusionListAsString(); 2864 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2865 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2866 } 2867 } else { 2868 mGlobalProxy = null; 2869 } 2870 ContentResolver res = mContext.getContentResolver(); 2871 final long token = Binder.clearCallingIdentity(); 2872 try { 2873 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2874 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2875 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2876 exclList); 2877 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2878 } finally { 2879 Binder.restoreCallingIdentity(token); 2880 } 2881 2882 if (mGlobalProxy == null) { 2883 proxyProperties = mDefaultProxy; 2884 } 2885 sendProxyBroadcast(proxyProperties); 2886 } 2887 } 2888 2889 private void loadGlobalProxy() { 2890 ContentResolver res = mContext.getContentResolver(); 2891 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2892 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2893 String exclList = Settings.Global.getString(res, 2894 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2895 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2896 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2897 ProxyInfo proxyProperties; 2898 if (!TextUtils.isEmpty(pacFileUrl)) { 2899 proxyProperties = new ProxyInfo(pacFileUrl); 2900 } else { 2901 proxyProperties = new ProxyInfo(host, port, exclList); 2902 } 2903 if (!proxyProperties.isValid()) { 2904 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2905 return; 2906 } 2907 2908 synchronized (mProxyLock) { 2909 mGlobalProxy = proxyProperties; 2910 } 2911 } 2912 } 2913 2914 public ProxyInfo getGlobalProxy() { 2915 // this information is already available as a world read/writable jvm property 2916 // so this API change wouldn't have a benifit. It also breaks the passing 2917 // of proxy info to all the JVMs. 2918 // enforceAccessPermission(); 2919 synchronized (mProxyLock) { 2920 return mGlobalProxy; 2921 } 2922 } 2923 2924 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2925 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2926 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2927 proxy = null; 2928 } 2929 synchronized (mProxyLock) { 2930 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2931 if (mDefaultProxy == proxy) return; // catches repeated nulls 2932 if (proxy != null && !proxy.isValid()) { 2933 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2934 return; 2935 } 2936 2937 // This call could be coming from the PacManager, containing the port of the local 2938 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2939 // global (to get the correct local port), and send a broadcast. 2940 // TODO: Switch PacManager to have its own message to send back rather than 2941 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2942 if ((mGlobalProxy != null) && (proxy != null) 2943 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2944 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2945 mGlobalProxy = proxy; 2946 sendProxyBroadcast(mGlobalProxy); 2947 return; 2948 } 2949 mDefaultProxy = proxy; 2950 2951 if (mGlobalProxy != null) return; 2952 if (!mDefaultProxyDisabled) { 2953 sendProxyBroadcast(proxy); 2954 } 2955 } 2956 } 2957 2958 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2959 // This method gets called when any network changes proxy, but the broadcast only ever contains 2960 // the default proxy (even if it hasn't changed). 2961 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2962 // world where an app might be bound to a non-default network. 2963 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2964 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2965 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2966 2967 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2968 sendProxyBroadcast(getDefaultProxy()); 2969 } 2970 } 2971 2972 private void handleDeprecatedGlobalHttpProxy() { 2973 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2974 Settings.Global.HTTP_PROXY); 2975 if (!TextUtils.isEmpty(proxy)) { 2976 String data[] = proxy.split(":"); 2977 if (data.length == 0) { 2978 return; 2979 } 2980 2981 String proxyHost = data[0]; 2982 int proxyPort = 8080; 2983 if (data.length > 1) { 2984 try { 2985 proxyPort = Integer.parseInt(data[1]); 2986 } catch (NumberFormatException e) { 2987 return; 2988 } 2989 } 2990 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2991 setGlobalProxy(p); 2992 } 2993 } 2994 2995 private void sendProxyBroadcast(ProxyInfo proxy) { 2996 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2997 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2998 if (DBG) log("sending Proxy Broadcast for " + proxy); 2999 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3000 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3001 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3002 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3003 final long ident = Binder.clearCallingIdentity(); 3004 try { 3005 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3006 } finally { 3007 Binder.restoreCallingIdentity(ident); 3008 } 3009 } 3010 3011 private static class SettingsObserver extends ContentObserver { 3012 final private HashMap<Uri, Integer> mUriEventMap; 3013 final private Context mContext; 3014 final private Handler mHandler; 3015 3016 SettingsObserver(Context context, Handler handler) { 3017 super(null); 3018 mUriEventMap = new HashMap<Uri, Integer>(); 3019 mContext = context; 3020 mHandler = handler; 3021 } 3022 3023 void observe(Uri uri, int what) { 3024 mUriEventMap.put(uri, what); 3025 final ContentResolver resolver = mContext.getContentResolver(); 3026 resolver.registerContentObserver(uri, false, this); 3027 } 3028 3029 @Override 3030 public void onChange(boolean selfChange) { 3031 Slog.wtf(TAG, "Should never be reached."); 3032 } 3033 3034 @Override 3035 public void onChange(boolean selfChange, Uri uri) { 3036 final Integer what = mUriEventMap.get(uri); 3037 if (what != null) { 3038 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3039 } else { 3040 loge("No matching event to send for URI=" + uri); 3041 } 3042 } 3043 } 3044 3045 private static void log(String s) { 3046 Slog.d(TAG, s); 3047 } 3048 3049 private static void loge(String s) { 3050 Slog.e(TAG, s); 3051 } 3052 3053 private static <T> T checkNotNull(T value, String message) { 3054 if (value == null) { 3055 throw new NullPointerException(message); 3056 } 3057 return value; 3058 } 3059 3060 /** 3061 * Prepare for a VPN application. 3062 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3063 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3064 * 3065 * @param oldPackage Package name of the application which currently controls VPN, which will 3066 * be replaced. If there is no such application, this should should either be 3067 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3068 * @param newPackage Package name of the application which should gain control of VPN, or 3069 * {@code null} to disable. 3070 * @param userId User for whom to prepare the new VPN. 3071 * 3072 * @hide 3073 */ 3074 @Override 3075 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3076 int userId) { 3077 enforceCrossUserPermission(userId); 3078 throwIfLockdownEnabled(); 3079 3080 synchronized(mVpns) { 3081 Vpn vpn = mVpns.get(userId); 3082 if (vpn != null) { 3083 return vpn.prepare(oldPackage, newPackage); 3084 } else { 3085 return false; 3086 } 3087 } 3088 } 3089 3090 /** 3091 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3092 * This method is used by system-privileged apps. 3093 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3094 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3095 * 3096 * @param packageName The package for which authorization state should change. 3097 * @param userId User for whom {@code packageName} is installed. 3098 * @param authorized {@code true} if this app should be able to start a VPN connection without 3099 * explicit user approval, {@code false} if not. 3100 * 3101 * @hide 3102 */ 3103 @Override 3104 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3105 enforceCrossUserPermission(userId); 3106 3107 synchronized(mVpns) { 3108 Vpn vpn = mVpns.get(userId); 3109 if (vpn != null) { 3110 vpn.setPackageAuthorization(packageName, authorized); 3111 } 3112 } 3113 } 3114 3115 /** 3116 * Configure a TUN interface and return its file descriptor. Parameters 3117 * are encoded and opaque to this class. This method is used by VpnBuilder 3118 * and not available in ConnectivityManager. Permissions are checked in 3119 * Vpn class. 3120 * @hide 3121 */ 3122 @Override 3123 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3124 throwIfLockdownEnabled(); 3125 int user = UserHandle.getUserId(Binder.getCallingUid()); 3126 synchronized(mVpns) { 3127 return mVpns.get(user).establish(config); 3128 } 3129 } 3130 3131 /** 3132 * Start legacy VPN, controlling native daemons as needed. Creates a 3133 * secondary thread to perform connection work, returning quickly. 3134 */ 3135 @Override 3136 public void startLegacyVpn(VpnProfile profile) { 3137 throwIfLockdownEnabled(); 3138 final LinkProperties egress = getActiveLinkProperties(); 3139 if (egress == null) { 3140 throw new IllegalStateException("Missing active network connection"); 3141 } 3142 int user = UserHandle.getUserId(Binder.getCallingUid()); 3143 synchronized(mVpns) { 3144 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3145 } 3146 } 3147 3148 /** 3149 * Return the information of the ongoing legacy VPN. This method is used 3150 * by VpnSettings and not available in ConnectivityManager. Permissions 3151 * are checked in Vpn class. 3152 */ 3153 @Override 3154 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3155 enforceCrossUserPermission(userId); 3156 if (mLockdownEnabled) { 3157 return null; 3158 } 3159 3160 synchronized(mVpns) { 3161 return mVpns.get(userId).getLegacyVpnInfo(); 3162 } 3163 } 3164 3165 /** 3166 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3167 * and not available in ConnectivityManager. 3168 */ 3169 @Override 3170 public VpnInfo[] getAllVpnInfo() { 3171 enforceConnectivityInternalPermission(); 3172 if (mLockdownEnabled) { 3173 return new VpnInfo[0]; 3174 } 3175 3176 synchronized(mVpns) { 3177 List<VpnInfo> infoList = new ArrayList<>(); 3178 for (int i = 0; i < mVpns.size(); i++) { 3179 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3180 if (info != null) { 3181 infoList.add(info); 3182 } 3183 } 3184 return infoList.toArray(new VpnInfo[infoList.size()]); 3185 } 3186 } 3187 3188 /** 3189 * @return VPN information for accounting, or null if we can't retrieve all required 3190 * information, e.g primary underlying iface. 3191 */ 3192 @Nullable 3193 private VpnInfo createVpnInfo(Vpn vpn) { 3194 VpnInfo info = vpn.getVpnInfo(); 3195 if (info == null) { 3196 return null; 3197 } 3198 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3199 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3200 // the underlyingNetworks list. 3201 if (underlyingNetworks == null) { 3202 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3203 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3204 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3205 } 3206 } else if (underlyingNetworks.length > 0) { 3207 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3208 if (linkProperties != null) { 3209 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3210 } 3211 } 3212 return info.primaryUnderlyingIface == null ? null : info; 3213 } 3214 3215 /** 3216 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3217 * VpnDialogs and not available in ConnectivityManager. 3218 * Permissions are checked in Vpn class. 3219 * @hide 3220 */ 3221 @Override 3222 public VpnConfig getVpnConfig(int userId) { 3223 enforceCrossUserPermission(userId); 3224 synchronized(mVpns) { 3225 Vpn vpn = mVpns.get(userId); 3226 if (vpn != null) { 3227 return vpn.getVpnConfig(); 3228 } else { 3229 return null; 3230 } 3231 } 3232 } 3233 3234 @Override 3235 public boolean updateLockdownVpn() { 3236 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3237 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3238 return false; 3239 } 3240 3241 // Tear down existing lockdown if profile was removed 3242 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3243 if (mLockdownEnabled) { 3244 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3245 final VpnProfile profile = VpnProfile.decode( 3246 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3247 if (profile == null) { 3248 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3249 setLockdownTracker(null); 3250 return true; 3251 } 3252 int user = UserHandle.getUserId(Binder.getCallingUid()); 3253 synchronized(mVpns) { 3254 Vpn vpn = mVpns.get(user); 3255 if (vpn == null) { 3256 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3257 return false; 3258 } 3259 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3260 } 3261 } else { 3262 setLockdownTracker(null); 3263 } 3264 3265 return true; 3266 } 3267 3268 /** 3269 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3270 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3271 */ 3272 private void setLockdownTracker(LockdownVpnTracker tracker) { 3273 // Shutdown any existing tracker 3274 final LockdownVpnTracker existing = mLockdownTracker; 3275 mLockdownTracker = null; 3276 if (existing != null) { 3277 existing.shutdown(); 3278 } 3279 3280 try { 3281 if (tracker != null) { 3282 mNetd.setFirewallEnabled(true); 3283 mNetd.setFirewallInterfaceRule("lo", true); 3284 mLockdownTracker = tracker; 3285 mLockdownTracker.init(); 3286 } else { 3287 mNetd.setFirewallEnabled(false); 3288 } 3289 } catch (RemoteException e) { 3290 // ignored; NMS lives inside system_server 3291 } 3292 } 3293 3294 private void throwIfLockdownEnabled() { 3295 if (mLockdownEnabled) { 3296 throw new IllegalStateException("Unavailable in lockdown mode"); 3297 } 3298 } 3299 3300 /** 3301 * Sets up or tears down the always-on VPN for user {@param user} as appropriate. 3302 * 3303 * @return {@code false} in case of errors; {@code true} otherwise. 3304 */ 3305 private boolean updateAlwaysOnVpn(int user) { 3306 final String lockdownPackage = getAlwaysOnVpnPackage(user); 3307 if (lockdownPackage == null) { 3308 return true; 3309 } 3310 3311 // Create an intent to start the VPN service declared in the app's manifest. 3312 Intent serviceIntent = new Intent(VpnConfig.SERVICE_INTERFACE); 3313 serviceIntent.setPackage(lockdownPackage); 3314 3315 try { 3316 return mContext.startServiceAsUser(serviceIntent, UserHandle.of(user)) != null; 3317 } catch (RuntimeException e) { 3318 return false; 3319 } 3320 } 3321 3322 @Override 3323 public boolean setAlwaysOnVpnPackage(int userId, String packageName) { 3324 enforceConnectivityInternalPermission(); 3325 enforceCrossUserPermission(userId); 3326 3327 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3328 if (LockdownVpnTracker.isEnabled()) { 3329 return false; 3330 } 3331 3332 // If the current VPN package is the same as the new one, this is a no-op 3333 final String oldPackage = getAlwaysOnVpnPackage(userId); 3334 if (TextUtils.equals(oldPackage, packageName)) { 3335 return true; 3336 } 3337 3338 synchronized (mVpns) { 3339 Vpn vpn = mVpns.get(userId); 3340 if (vpn == null) { 3341 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3342 return false; 3343 } 3344 if (!vpn.setAlwaysOnPackage(packageName)) { 3345 return false; 3346 } 3347 if (!updateAlwaysOnVpn(userId)) { 3348 vpn.setAlwaysOnPackage(null); 3349 return false; 3350 } 3351 } 3352 return true; 3353 } 3354 3355 @Override 3356 public String getAlwaysOnVpnPackage(int userId) { 3357 enforceConnectivityInternalPermission(); 3358 enforceCrossUserPermission(userId); 3359 3360 synchronized (mVpns) { 3361 Vpn vpn = mVpns.get(userId); 3362 if (vpn == null) { 3363 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3364 return null; 3365 } 3366 return vpn.getAlwaysOnPackage(); 3367 } 3368 } 3369 3370 @Override 3371 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3372 // TODO: Remove? Any reason to trigger a provisioning check? 3373 return -1; 3374 } 3375 3376 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3377 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3378 3379 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3380 Intent intent = new Intent(action); 3381 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3382 // Concatenate the range of types onto the range of NetIDs. 3383 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3384 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3385 networkType, null, pendingIntent, false); 3386 } 3387 3388 /** 3389 * Show or hide network provisioning notifications. 3390 * 3391 * We use notifications for two purposes: to notify that a network requires sign in 3392 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3393 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3394 * particular network we can display the notification type that was most recently requested. 3395 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3396 * might first display NO_INTERNET, and then when the captive portal check completes, display 3397 * SIGN_IN. 3398 * 3399 * @param id an identifier that uniquely identifies this notification. This must match 3400 * between show and hide calls. We use the NetID value but for legacy callers 3401 * we concatenate the range of types with the range of NetIDs. 3402 */ 3403 private void setProvNotificationVisibleIntent(boolean visible, int id, 3404 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3405 boolean highPriority) { 3406 if (VDBG || (DBG && visible)) { 3407 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3408 + " networkType=" + getNetworkTypeName(networkType) 3409 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3410 } 3411 3412 Resources r = Resources.getSystem(); 3413 NotificationManager notificationManager = (NotificationManager) mContext 3414 .getSystemService(Context.NOTIFICATION_SERVICE); 3415 3416 if (visible) { 3417 CharSequence title; 3418 CharSequence details; 3419 int icon; 3420 if (notifyType == NotificationType.NO_INTERNET && 3421 networkType == ConnectivityManager.TYPE_WIFI) { 3422 title = r.getString(R.string.wifi_no_internet, 0); 3423 details = r.getString(R.string.wifi_no_internet_detailed); 3424 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3425 } else if (notifyType == NotificationType.SIGN_IN) { 3426 switch (networkType) { 3427 case ConnectivityManager.TYPE_WIFI: 3428 title = r.getString(R.string.wifi_available_sign_in, 0); 3429 details = r.getString(R.string.network_available_sign_in_detailed, 3430 extraInfo); 3431 icon = R.drawable.stat_notify_wifi_in_range; 3432 break; 3433 case ConnectivityManager.TYPE_MOBILE: 3434 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3435 title = r.getString(R.string.network_available_sign_in, 0); 3436 // TODO: Change this to pull from NetworkInfo once a printable 3437 // name has been added to it 3438 details = mTelephonyManager.getNetworkOperatorName(); 3439 icon = R.drawable.stat_notify_rssi_in_range; 3440 break; 3441 default: 3442 title = r.getString(R.string.network_available_sign_in, 0); 3443 details = r.getString(R.string.network_available_sign_in_detailed, 3444 extraInfo); 3445 icon = R.drawable.stat_notify_rssi_in_range; 3446 break; 3447 } 3448 } else { 3449 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3450 + getNetworkTypeName(networkType)); 3451 return; 3452 } 3453 3454 Notification notification = new Notification.Builder(mContext) 3455 .setWhen(0) 3456 .setSmallIcon(icon) 3457 .setAutoCancel(true) 3458 .setTicker(title) 3459 .setColor(mContext.getColor( 3460 com.android.internal.R.color.system_notification_accent_color)) 3461 .setContentTitle(title) 3462 .setContentText(details) 3463 .setContentIntent(intent) 3464 .setLocalOnly(true) 3465 .setPriority(highPriority ? 3466 Notification.PRIORITY_HIGH : 3467 Notification.PRIORITY_DEFAULT) 3468 .setDefaults(highPriority ? Notification.DEFAULT_ALL : 0) 3469 .setOnlyAlertOnce(true) 3470 .build(); 3471 3472 try { 3473 notificationManager.notify(NOTIFICATION_ID, id, notification); 3474 } catch (NullPointerException npe) { 3475 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3476 npe.printStackTrace(); 3477 } 3478 } else { 3479 try { 3480 notificationManager.cancel(NOTIFICATION_ID, id); 3481 } catch (NullPointerException npe) { 3482 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3483 npe.printStackTrace(); 3484 } 3485 } 3486 } 3487 3488 /** Location to an updatable file listing carrier provisioning urls. 3489 * An example: 3490 * 3491 * <?xml version="1.0" encoding="utf-8"?> 3492 * <provisioningUrls> 3493 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3494 * </provisioningUrls> 3495 */ 3496 private static final String PROVISIONING_URL_PATH = 3497 "/data/misc/radio/provisioning_urls.xml"; 3498 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3499 3500 /** XML tag for root element. */ 3501 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3502 /** XML tag for individual url */ 3503 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3504 /** XML attribute for mcc */ 3505 private static final String ATTR_MCC = "mcc"; 3506 /** XML attribute for mnc */ 3507 private static final String ATTR_MNC = "mnc"; 3508 3509 private String getProvisioningUrlBaseFromFile() { 3510 FileReader fileReader = null; 3511 XmlPullParser parser = null; 3512 Configuration config = mContext.getResources().getConfiguration(); 3513 3514 try { 3515 fileReader = new FileReader(mProvisioningUrlFile); 3516 parser = Xml.newPullParser(); 3517 parser.setInput(fileReader); 3518 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3519 3520 while (true) { 3521 XmlUtils.nextElement(parser); 3522 3523 String element = parser.getName(); 3524 if (element == null) break; 3525 3526 if (element.equals(TAG_PROVISIONING_URL)) { 3527 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3528 try { 3529 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3530 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3531 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3532 parser.next(); 3533 if (parser.getEventType() == XmlPullParser.TEXT) { 3534 return parser.getText(); 3535 } 3536 } 3537 } 3538 } catch (NumberFormatException e) { 3539 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3540 } 3541 } 3542 } 3543 return null; 3544 } catch (FileNotFoundException e) { 3545 loge("Carrier Provisioning Urls file not found"); 3546 } catch (XmlPullParserException e) { 3547 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3548 } catch (IOException e) { 3549 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3550 } finally { 3551 if (fileReader != null) { 3552 try { 3553 fileReader.close(); 3554 } catch (IOException e) {} 3555 } 3556 } 3557 return null; 3558 } 3559 3560 @Override 3561 public String getMobileProvisioningUrl() { 3562 enforceConnectivityInternalPermission(); 3563 String url = getProvisioningUrlBaseFromFile(); 3564 if (TextUtils.isEmpty(url)) { 3565 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3566 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3567 } else { 3568 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3569 } 3570 // populate the iccid, imei and phone number in the provisioning url. 3571 if (!TextUtils.isEmpty(url)) { 3572 String phoneNumber = mTelephonyManager.getLine1Number(); 3573 if (TextUtils.isEmpty(phoneNumber)) { 3574 phoneNumber = "0000000000"; 3575 } 3576 url = String.format(url, 3577 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3578 mTelephonyManager.getDeviceId() /* IMEI */, 3579 phoneNumber /* Phone numer */); 3580 } 3581 3582 return url; 3583 } 3584 3585 @Override 3586 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3587 String action) { 3588 enforceConnectivityInternalPermission(); 3589 final long ident = Binder.clearCallingIdentity(); 3590 try { 3591 setProvNotificationVisible(visible, networkType, action); 3592 } finally { 3593 Binder.restoreCallingIdentity(ident); 3594 } 3595 } 3596 3597 @Override 3598 public void setAirplaneMode(boolean enable) { 3599 enforceConnectivityInternalPermission(); 3600 final long ident = Binder.clearCallingIdentity(); 3601 try { 3602 final ContentResolver cr = mContext.getContentResolver(); 3603 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3604 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3605 intent.putExtra("state", enable); 3606 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3607 } finally { 3608 Binder.restoreCallingIdentity(ident); 3609 } 3610 } 3611 3612 private void onUserStart(int userId) { 3613 synchronized(mVpns) { 3614 Vpn userVpn = mVpns.get(userId); 3615 if (userVpn != null) { 3616 loge("Starting user already has a VPN"); 3617 return; 3618 } 3619 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3620 mVpns.put(userId, userVpn); 3621 } 3622 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3623 updateLockdownVpn(); 3624 } else { 3625 updateAlwaysOnVpn(userId); 3626 } 3627 } 3628 3629 private void onUserStop(int userId) { 3630 synchronized(mVpns) { 3631 Vpn userVpn = mVpns.get(userId); 3632 if (userVpn == null) { 3633 loge("Stopping user has no VPN"); 3634 return; 3635 } 3636 mVpns.delete(userId); 3637 } 3638 } 3639 3640 private void onUserAdded(int userId) { 3641 synchronized(mVpns) { 3642 final int vpnsSize = mVpns.size(); 3643 for (int i = 0; i < vpnsSize; i++) { 3644 Vpn vpn = mVpns.valueAt(i); 3645 vpn.onUserAdded(userId); 3646 } 3647 } 3648 } 3649 3650 private void onUserRemoved(int userId) { 3651 synchronized(mVpns) { 3652 final int vpnsSize = mVpns.size(); 3653 for (int i = 0; i < vpnsSize; i++) { 3654 Vpn vpn = mVpns.valueAt(i); 3655 vpn.onUserRemoved(userId); 3656 } 3657 } 3658 } 3659 3660 private void onUserUnlocked(int userId) { 3661 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3662 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3663 updateLockdownVpn(); 3664 } else { 3665 updateAlwaysOnVpn(userId); 3666 } 3667 } 3668 3669 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3670 @Override 3671 public void onReceive(Context context, Intent intent) { 3672 final String action = intent.getAction(); 3673 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3674 if (userId == UserHandle.USER_NULL) return; 3675 3676 if (Intent.ACTION_USER_STARTING.equals(action)) { 3677 onUserStart(userId); 3678 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3679 onUserStop(userId); 3680 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3681 onUserAdded(userId); 3682 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3683 onUserRemoved(userId); 3684 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3685 onUserUnlocked(userId); 3686 } 3687 } 3688 }; 3689 3690 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3691 new HashMap<Messenger, NetworkFactoryInfo>(); 3692 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3693 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3694 3695 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3696 // Map from UID to number of NetworkRequests that UID has filed. 3697 @GuardedBy("mUidToNetworkRequestCount") 3698 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3699 3700 private static class NetworkFactoryInfo { 3701 public final String name; 3702 public final Messenger messenger; 3703 public final AsyncChannel asyncChannel; 3704 3705 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3706 this.name = name; 3707 this.messenger = messenger; 3708 this.asyncChannel = asyncChannel; 3709 } 3710 } 3711 3712 /** 3713 * A NetworkRequest as registered by an application can be one of three 3714 * types: 3715 * 3716 * - "listen", for which the framework will issue callbacks about any 3717 * and all networks that match the specified NetworkCapabilities, 3718 * 3719 * - "request", capable of causing a specific network to be created 3720 * first (e.g. a telephony DUN request), the framework will issue 3721 * callbacks about the single, highest scoring current network 3722 * (if any) that matches the specified NetworkCapabilities, or 3723 * 3724 * - "track the default network", a hybrid of the two designed such 3725 * that the framework will issue callbacks for the single, highest 3726 * scoring current network (if any) that matches the capabilities of 3727 * the default Internet request (mDefaultRequest), but which cannot 3728 * cause the framework to either create or retain the existence of 3729 * any specific network. 3730 * 3731 */ 3732 private static enum NetworkRequestType { 3733 LISTEN, 3734 TRACK_DEFAULT, 3735 REQUEST 3736 }; 3737 3738 /** 3739 * Tracks info about the requester. 3740 * Also used to notice when the calling process dies so we can self-expire 3741 */ 3742 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3743 final NetworkRequest request; 3744 final PendingIntent mPendingIntent; 3745 boolean mPendingIntentSent; 3746 private final IBinder mBinder; 3747 final int mPid; 3748 final int mUid; 3749 final Messenger messenger; 3750 private final NetworkRequestType mType; 3751 3752 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, NetworkRequestType type) { 3753 request = r; 3754 mPendingIntent = pi; 3755 messenger = null; 3756 mBinder = null; 3757 mPid = getCallingPid(); 3758 mUid = getCallingUid(); 3759 mType = type; 3760 enforceRequestCountLimit(); 3761 } 3762 3763 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, NetworkRequestType type) { 3764 super(); 3765 messenger = m; 3766 request = r; 3767 mBinder = binder; 3768 mPid = getCallingPid(); 3769 mUid = getCallingUid(); 3770 mType = type; 3771 mPendingIntent = null; 3772 enforceRequestCountLimit(); 3773 3774 try { 3775 mBinder.linkToDeath(this, 0); 3776 } catch (RemoteException e) { 3777 binderDied(); 3778 } 3779 } 3780 3781 private void enforceRequestCountLimit() { 3782 synchronized (mUidToNetworkRequestCount) { 3783 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 3784 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 3785 throw new IllegalArgumentException("Too many NetworkRequests filed"); 3786 } 3787 mUidToNetworkRequestCount.put(mUid, networkRequests); 3788 } 3789 } 3790 3791 private String typeString() { 3792 switch (mType) { 3793 case LISTEN: return "Listen"; 3794 case REQUEST: return "Request"; 3795 case TRACK_DEFAULT: return "Track default"; 3796 default: 3797 return "unknown type"; 3798 } 3799 } 3800 3801 void unlinkDeathRecipient() { 3802 if (mBinder != null) { 3803 mBinder.unlinkToDeath(this, 0); 3804 } 3805 } 3806 3807 public void binderDied() { 3808 log("ConnectivityService NetworkRequestInfo binderDied(" + 3809 request + ", " + mBinder + ")"); 3810 releaseNetworkRequest(request); 3811 } 3812 3813 /** 3814 * Returns true iff. the contained NetworkRequest is one that: 3815 * 3816 * - should be associated with at most one satisfying network 3817 * at a time; 3818 * 3819 * - should cause a network to be kept up if it is the only network 3820 * which can satisfy the NetworkReqeust. 3821 * 3822 * For full detail of how isRequest() is used for pairing Networks with 3823 * NetworkRequests read rematchNetworkAndRequests(). 3824 * 3825 * TODO: Rename to something more properly descriptive. 3826 */ 3827 public boolean isRequest() { 3828 return (mType == NetworkRequestType.TRACK_DEFAULT) || 3829 (mType == NetworkRequestType.REQUEST); 3830 } 3831 3832 public String toString() { 3833 return typeString() + 3834 " from uid/pid:" + mUid + "/" + mPid + 3835 " for " + request + 3836 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3837 } 3838 } 3839 3840 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3841 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3842 if (badCapability != null) { 3843 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3844 } 3845 } 3846 3847 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3848 final SortedSet<Integer> thresholds = new TreeSet(); 3849 synchronized (nai) { 3850 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3851 if (nri.request.networkCapabilities.hasSignalStrength() && 3852 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3853 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3854 } 3855 } 3856 } 3857 return new ArrayList<Integer>(thresholds); 3858 } 3859 3860 private void updateSignalStrengthThresholds( 3861 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3862 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3863 Bundle thresholds = new Bundle(); 3864 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3865 3866 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 3867 String detail; 3868 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3869 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3870 } else { 3871 detail = reason; 3872 } 3873 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3874 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3875 } 3876 3877 nai.asyncChannel.sendMessage( 3878 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3879 0, 0, thresholds); 3880 } 3881 3882 @Override 3883 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3884 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3885 final NetworkRequestType type = (networkCapabilities == null) 3886 ? NetworkRequestType.TRACK_DEFAULT 3887 : NetworkRequestType.REQUEST; 3888 // If the requested networkCapabilities is null, take them instead from 3889 // the default network request. This allows callers to keep track of 3890 // the system default network. 3891 if (type == NetworkRequestType.TRACK_DEFAULT) { 3892 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 3893 enforceAccessPermission(); 3894 } else { 3895 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3896 enforceNetworkRequestPermissions(networkCapabilities); 3897 } 3898 enforceMeteredApnPolicy(networkCapabilities); 3899 ensureRequestableCapabilities(networkCapabilities); 3900 3901 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3902 throw new IllegalArgumentException("Bad timeout specified"); 3903 } 3904 3905 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 3906 .equals(networkCapabilities.getNetworkSpecifier())) { 3907 throw new IllegalArgumentException("Invalid network specifier - must not be '" 3908 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 3909 } 3910 3911 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3912 nextNetworkRequestId()); 3913 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, type); 3914 if (DBG) log("requestNetwork for " + nri); 3915 3916 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3917 if (timeoutMs > 0) { 3918 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3919 nri), timeoutMs); 3920 } 3921 return networkRequest; 3922 } 3923 3924 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3925 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 3926 enforceConnectivityInternalPermission(); 3927 } else { 3928 enforceChangePermission(); 3929 } 3930 } 3931 3932 @Override 3933 public boolean requestBandwidthUpdate(Network network) { 3934 enforceAccessPermission(); 3935 NetworkAgentInfo nai = null; 3936 if (network == null) { 3937 return false; 3938 } 3939 synchronized (mNetworkForNetId) { 3940 nai = mNetworkForNetId.get(network.netId); 3941 } 3942 if (nai != null) { 3943 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3944 return true; 3945 } 3946 return false; 3947 } 3948 3949 3950 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3951 // if UID is restricted, don't allow them to bring up metered APNs 3952 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 3953 final int uidRules; 3954 final int uid = Binder.getCallingUid(); 3955 synchronized(mRulesLock) { 3956 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3957 } 3958 if (uidRules != RULE_ALLOW_ALL) { 3959 // we could silently fail or we can filter the available nets to only give 3960 // them those they have access to. Chose the more useful 3961 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 3962 } 3963 } 3964 } 3965 3966 @Override 3967 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3968 PendingIntent operation) { 3969 checkNotNull(operation, "PendingIntent cannot be null."); 3970 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3971 enforceNetworkRequestPermissions(networkCapabilities); 3972 enforceMeteredApnPolicy(networkCapabilities); 3973 ensureRequestableCapabilities(networkCapabilities); 3974 3975 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3976 nextNetworkRequestId()); 3977 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3978 NetworkRequestType.REQUEST); 3979 if (DBG) log("pendingRequest for " + nri); 3980 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3981 nri)); 3982 return networkRequest; 3983 } 3984 3985 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3986 mHandler.sendMessageDelayed( 3987 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3988 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3989 } 3990 3991 @Override 3992 public void releasePendingNetworkRequest(PendingIntent operation) { 3993 checkNotNull(operation, "PendingIntent cannot be null."); 3994 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3995 getCallingUid(), 0, operation)); 3996 } 3997 3998 // In order to implement the compatibility measure for pre-M apps that call 3999 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4000 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4001 // This ensures it has permission to do so. 4002 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4003 if (nc == null) { 4004 return false; 4005 } 4006 int[] transportTypes = nc.getTransportTypes(); 4007 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4008 return false; 4009 } 4010 try { 4011 mContext.enforceCallingOrSelfPermission( 4012 android.Manifest.permission.ACCESS_WIFI_STATE, 4013 "ConnectivityService"); 4014 } catch (SecurityException e) { 4015 return false; 4016 } 4017 return true; 4018 } 4019 4020 @Override 4021 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4022 Messenger messenger, IBinder binder) { 4023 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4024 enforceAccessPermission(); 4025 } 4026 4027 NetworkRequest networkRequest = new NetworkRequest( 4028 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 4029 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 4030 NetworkRequestType.LISTEN); 4031 if (VDBG) log("listenForNetwork for " + nri); 4032 4033 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4034 return networkRequest; 4035 } 4036 4037 @Override 4038 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4039 PendingIntent operation) { 4040 checkNotNull(operation, "PendingIntent cannot be null."); 4041 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4042 enforceAccessPermission(); 4043 } 4044 4045 NetworkRequest networkRequest = new NetworkRequest( 4046 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 4047 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 4048 NetworkRequestType.LISTEN); 4049 if (VDBG) log("pendingListenForNetwork for " + nri); 4050 4051 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4052 } 4053 4054 @Override 4055 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4056 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 4057 0, networkRequest)); 4058 } 4059 4060 @Override 4061 public void registerNetworkFactory(Messenger messenger, String name) { 4062 enforceConnectivityInternalPermission(); 4063 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4064 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4065 } 4066 4067 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4068 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4069 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4070 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4071 } 4072 4073 @Override 4074 public void unregisterNetworkFactory(Messenger messenger) { 4075 enforceConnectivityInternalPermission(); 4076 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4077 } 4078 4079 private void handleUnregisterNetworkFactory(Messenger messenger) { 4080 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4081 if (nfi == null) { 4082 loge("Failed to find Messenger in unregisterNetworkFactory"); 4083 return; 4084 } 4085 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4086 } 4087 4088 /** 4089 * NetworkAgentInfo supporting a request by requestId. 4090 * These have already been vetted (their Capabilities satisfy the request) 4091 * and the are the highest scored network available. 4092 * the are keyed off the Requests requestId. 4093 */ 4094 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4095 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4096 new SparseArray<NetworkAgentInfo>(); 4097 4098 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4099 @GuardedBy("mNetworkForNetId") 4100 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4101 new SparseArray<NetworkAgentInfo>(); 4102 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4103 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4104 // there may not be a strict 1:1 correlation between the two. 4105 @GuardedBy("mNetworkForNetId") 4106 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4107 4108 // NetworkAgentInfo keyed off its connecting messenger 4109 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4110 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4111 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4112 new HashMap<Messenger, NetworkAgentInfo>(); 4113 4114 @GuardedBy("mBlockedAppUids") 4115 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4116 4117 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4118 private final NetworkRequest mDefaultRequest; 4119 4120 // Request used to optionally keep mobile data active even when higher 4121 // priority networks like Wi-Fi are active. 4122 private final NetworkRequest mDefaultMobileDataRequest; 4123 4124 private NetworkAgentInfo getDefaultNetwork() { 4125 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4126 } 4127 4128 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4129 return nai == getDefaultNetwork(); 4130 } 4131 4132 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4133 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4134 int currentScore, NetworkMisc networkMisc) { 4135 enforceConnectivityInternalPermission(); 4136 4137 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4138 // satisfies mDefaultRequest. 4139 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4140 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4141 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4142 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4143 synchronized (this) { 4144 nai.networkMonitor.systemReady = mSystemReady; 4145 } 4146 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network); 4147 if (DBG) log("registerNetworkAgent " + nai); 4148 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4149 return nai.network.netId; 4150 } 4151 4152 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4153 if (VDBG) log("Got NetworkAgent Messenger"); 4154 mNetworkAgentInfos.put(na.messenger, na); 4155 synchronized (mNetworkForNetId) { 4156 mNetworkForNetId.put(na.network.netId, na); 4157 } 4158 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4159 NetworkInfo networkInfo = na.networkInfo; 4160 na.networkInfo = null; 4161 updateNetworkInfo(na, networkInfo); 4162 } 4163 4164 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4165 LinkProperties newLp = networkAgent.linkProperties; 4166 int netId = networkAgent.network.netId; 4167 4168 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4169 // we do anything else, make sure its LinkProperties are accurate. 4170 if (networkAgent.clatd != null) { 4171 networkAgent.clatd.fixupLinkProperties(oldLp); 4172 } 4173 4174 updateInterfaces(newLp, oldLp, netId); 4175 updateMtu(newLp, oldLp); 4176 // TODO - figure out what to do for clat 4177// for (LinkProperties lp : newLp.getStackedLinks()) { 4178// updateMtu(lp, null); 4179// } 4180 updateTcpBufferSizes(networkAgent); 4181 4182 updateRoutes(newLp, oldLp, netId); 4183 updateDnses(newLp, oldLp, netId); 4184 4185 updateClat(newLp, oldLp, networkAgent); 4186 if (isDefaultNetwork(networkAgent)) { 4187 handleApplyDefaultProxy(newLp.getHttpProxy()); 4188 } else { 4189 updateProxy(newLp, oldLp, networkAgent); 4190 } 4191 // TODO - move this check to cover the whole function 4192 if (!Objects.equals(newLp, oldLp)) { 4193 notifyIfacesChangedForNetworkStats(); 4194 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4195 } 4196 4197 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4198 } 4199 4200 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4201 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4202 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4203 4204 if (!wasRunningClat && shouldRunClat) { 4205 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4206 nai.clatd.start(); 4207 } else if (wasRunningClat && !shouldRunClat) { 4208 nai.clatd.stop(); 4209 } 4210 } 4211 4212 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4213 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4214 if (oldLp != null) { 4215 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4216 } else if (newLp != null) { 4217 interfaceDiff.added = newLp.getAllInterfaceNames(); 4218 } 4219 for (String iface : interfaceDiff.added) { 4220 try { 4221 if (DBG) log("Adding iface " + iface + " to network " + netId); 4222 mNetd.addInterfaceToNetwork(iface, netId); 4223 } catch (Exception e) { 4224 loge("Exception adding interface: " + e); 4225 } 4226 } 4227 for (String iface : interfaceDiff.removed) { 4228 try { 4229 if (DBG) log("Removing iface " + iface + " from network " + netId); 4230 mNetd.removeInterfaceFromNetwork(iface, netId); 4231 } catch (Exception e) { 4232 loge("Exception removing interface: " + e); 4233 } 4234 } 4235 } 4236 4237 /** 4238 * Have netd update routes from oldLp to newLp. 4239 * @return true if routes changed between oldLp and newLp 4240 */ 4241 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4242 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4243 if (oldLp != null) { 4244 routeDiff = oldLp.compareAllRoutes(newLp); 4245 } else if (newLp != null) { 4246 routeDiff.added = newLp.getAllRoutes(); 4247 } 4248 4249 // add routes before removing old in case it helps with continuous connectivity 4250 4251 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4252 for (RouteInfo route : routeDiff.added) { 4253 if (route.hasGateway()) continue; 4254 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4255 try { 4256 mNetd.addRoute(netId, route); 4257 } catch (Exception e) { 4258 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4259 loge("Exception in addRoute for non-gateway: " + e); 4260 } 4261 } 4262 } 4263 for (RouteInfo route : routeDiff.added) { 4264 if (route.hasGateway() == false) continue; 4265 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4266 try { 4267 mNetd.addRoute(netId, route); 4268 } catch (Exception e) { 4269 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4270 loge("Exception in addRoute for gateway: " + e); 4271 } 4272 } 4273 } 4274 4275 for (RouteInfo route : routeDiff.removed) { 4276 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4277 try { 4278 mNetd.removeRoute(netId, route); 4279 } catch (Exception e) { 4280 loge("Exception in removeRoute: " + e); 4281 } 4282 } 4283 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4284 } 4285 4286 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4287 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4288 return; // no updating necessary 4289 } 4290 4291 Collection<InetAddress> dnses = newLp.getDnsServers(); 4292 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4293 try { 4294 mNetd.setDnsServersForNetwork( 4295 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4296 } catch (Exception e) { 4297 loge("Exception in setDnsServersForNetwork: " + e); 4298 } 4299 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4300 if (defaultNai != null && defaultNai.network.netId == netId) { 4301 setDefaultDnsSystemProperties(dnses); 4302 } 4303 flushVmDnsCache(); 4304 } 4305 4306 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4307 int last = 0; 4308 for (InetAddress dns : dnses) { 4309 ++last; 4310 String key = "net.dns" + last; 4311 String value = dns.getHostAddress(); 4312 SystemProperties.set(key, value); 4313 } 4314 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4315 String key = "net.dns" + i; 4316 SystemProperties.set(key, ""); 4317 } 4318 mNumDnsEntries = last; 4319 } 4320 4321 /** 4322 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4323 * augmented with any stateful capabilities implied from {@code networkAgent} 4324 * (e.g., validated status and captive portal status). 4325 * 4326 * @param nai the network having its capabilities updated. 4327 * @param networkCapabilities the new network capabilities. 4328 */ 4329 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4330 // Don't modify caller's NetworkCapabilities. 4331 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4332 if (nai.lastValidated) { 4333 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4334 } else { 4335 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4336 } 4337 if (nai.lastCaptivePortalDetected) { 4338 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4339 } else { 4340 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4341 } 4342 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4343 final int oldScore = nai.getCurrentScore(); 4344 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4345 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4346 try { 4347 mNetd.setNetworkPermission(nai.network.netId, 4348 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4349 null : NetworkManagementService.PERMISSION_SYSTEM); 4350 } catch (RemoteException e) { 4351 loge("Exception in setNetworkPermission: " + e); 4352 } 4353 } 4354 synchronized (nai) { 4355 nai.networkCapabilities = networkCapabilities; 4356 } 4357 rematchAllNetworksAndRequests(nai, oldScore); 4358 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4359 } 4360 } 4361 4362 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4363 for (int i = 0; i < nai.networkRequests.size(); i++) { 4364 NetworkRequest nr = nai.networkRequests.valueAt(i); 4365 // Don't send listening requests to factories. b/17393458 4366 if (!isRequest(nr)) continue; 4367 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4368 } 4369 } 4370 4371 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4372 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4373 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4374 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4375 networkRequest); 4376 } 4377 } 4378 4379 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4380 int notificationType) { 4381 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4382 Intent intent = new Intent(); 4383 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4384 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4385 nri.mPendingIntentSent = true; 4386 sendIntent(nri.mPendingIntent, intent); 4387 } 4388 // else not handled 4389 } 4390 4391 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4392 mPendingIntentWakeLock.acquire(); 4393 try { 4394 if (DBG) log("Sending " + pendingIntent); 4395 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4396 } catch (PendingIntent.CanceledException e) { 4397 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4398 mPendingIntentWakeLock.release(); 4399 releasePendingNetworkRequest(pendingIntent); 4400 } 4401 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4402 } 4403 4404 @Override 4405 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4406 String resultData, Bundle resultExtras) { 4407 if (DBG) log("Finished sending " + pendingIntent); 4408 mPendingIntentWakeLock.release(); 4409 // Release with a delay so the receiving client has an opportunity to put in its 4410 // own request. 4411 releasePendingNetworkRequestWithDelay(pendingIntent); 4412 } 4413 4414 private void callCallbackForRequest(NetworkRequestInfo nri, 4415 NetworkAgentInfo networkAgent, int notificationType) { 4416 if (nri.messenger == null) return; // Default request has no msgr 4417 Bundle bundle = new Bundle(); 4418 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4419 new NetworkRequest(nri.request)); 4420 Message msg = Message.obtain(); 4421 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4422 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4423 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4424 } 4425 switch (notificationType) { 4426 case ConnectivityManager.CALLBACK_LOSING: { 4427 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4428 break; 4429 } 4430 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4431 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4432 new NetworkCapabilities(networkAgent.networkCapabilities)); 4433 break; 4434 } 4435 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4436 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4437 new LinkProperties(networkAgent.linkProperties)); 4438 break; 4439 } 4440 } 4441 msg.what = notificationType; 4442 msg.setData(bundle); 4443 try { 4444 if (VDBG) { 4445 log("sending notification " + notifyTypeToName(notificationType) + 4446 " for " + nri.request); 4447 } 4448 nri.messenger.send(msg); 4449 } catch (RemoteException e) { 4450 // may occur naturally in the race of binder death. 4451 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4452 } 4453 } 4454 4455 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4456 for (int i = 0; i < nai.networkRequests.size(); i++) { 4457 NetworkRequest nr = nai.networkRequests.valueAt(i); 4458 // Ignore listening requests. 4459 if (!isRequest(nr)) continue; 4460 loge("Dead network still had at least " + nr); 4461 break; 4462 } 4463 nai.asyncChannel.disconnect(); 4464 } 4465 4466 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4467 if (oldNetwork == null) { 4468 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4469 return; 4470 } 4471 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4472 teardownUnneededNetwork(oldNetwork); 4473 } 4474 4475 private void makeDefault(NetworkAgentInfo newNetwork, NetworkAgentInfo prevNetwork) { 4476 if (DBG) log("Switching to new default network: " + newNetwork); 4477 setupDataActivityTracking(newNetwork); 4478 try { 4479 mNetd.setDefaultNetId(newNetwork.network.netId); 4480 } catch (Exception e) { 4481 loge("Exception setting default network :" + e); 4482 } 4483 notifyLockdownVpn(newNetwork); 4484 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4485 updateTcpBufferSizes(newNetwork); 4486 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4487 logDefaultNetworkEvent(newNetwork, prevNetwork); 4488 } 4489 4490 // Handles a network appearing or improving its score. 4491 // 4492 // - Evaluates all current NetworkRequests that can be 4493 // satisfied by newNetwork, and reassigns to newNetwork 4494 // any such requests for which newNetwork is the best. 4495 // 4496 // - Lingers any validated Networks that as a result are no longer 4497 // needed. A network is needed if it is the best network for 4498 // one or more NetworkRequests, or if it is a VPN. 4499 // 4500 // - Tears down newNetwork if it just became validated 4501 // but turns out to be unneeded. 4502 // 4503 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4504 // networks that have no chance (i.e. even if validated) 4505 // of becoming the highest scoring network. 4506 // 4507 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4508 // it does not remove NetworkRequests that other Networks could better satisfy. 4509 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4510 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4511 // as it performs better by a factor of the number of Networks. 4512 // 4513 // @param newNetwork is the network to be matched against NetworkRequests. 4514 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4515 // performed to tear down unvalidated networks that have no chance (i.e. even if 4516 // validated) of becoming the highest scoring network. 4517 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4518 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4519 if (!newNetwork.created) return; 4520 boolean keep = newNetwork.isVPN(); 4521 boolean isNewDefault = false; 4522 NetworkAgentInfo oldDefaultNetwork = null; 4523 if (VDBG) log("rematching " + newNetwork.name()); 4524 // Find and migrate to this Network any NetworkRequests for 4525 // which this network is now the best. 4526 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4527 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4528 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4529 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4530 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4531 final boolean satisfies = newNetwork.satisfies(nri.request); 4532 if (newNetwork == currentNetwork && satisfies) { 4533 if (VDBG) { 4534 log("Network " + newNetwork.name() + " was already satisfying" + 4535 " request " + nri.request.requestId + ". No change."); 4536 } 4537 keep = true; 4538 continue; 4539 } 4540 4541 // check if it satisfies the NetworkCapabilities 4542 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4543 if (satisfies) { 4544 if (!nri.isRequest()) { 4545 // This is not a request, it's a callback listener. 4546 // Add it to newNetwork regardless of score. 4547 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4548 continue; 4549 } 4550 4551 // next check if it's better than any current network we're using for 4552 // this request 4553 if (VDBG) { 4554 log("currentScore = " + 4555 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4556 ", newScore = " + newNetwork.getCurrentScore()); 4557 } 4558 if (currentNetwork == null || 4559 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4560 if (VDBG) log("rematch for " + newNetwork.name()); 4561 if (currentNetwork != null) { 4562 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4563 currentNetwork.networkRequests.remove(nri.request.requestId); 4564 currentNetwork.networkLingered.add(nri.request); 4565 affectedNetworks.add(currentNetwork); 4566 } else { 4567 if (VDBG) log(" accepting network in place of null"); 4568 } 4569 unlinger(newNetwork); 4570 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4571 if (!newNetwork.addRequest(nri.request)) { 4572 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4573 } 4574 addedRequests.add(nri); 4575 keep = true; 4576 // Tell NetworkFactories about the new score, so they can stop 4577 // trying to connect if they know they cannot match it. 4578 // TODO - this could get expensive if we have alot of requests for this 4579 // network. Think about if there is a way to reduce this. Push 4580 // netid->request mapping to each factory? 4581 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4582 if (mDefaultRequest.requestId == nri.request.requestId) { 4583 isNewDefault = true; 4584 oldDefaultNetwork = currentNetwork; 4585 } 4586 } 4587 } else if (newNetwork.networkRequests.get(nri.request.requestId) != null) { 4588 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4589 // mark it as no longer satisfying "nri". Because networks are processed by 4590 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4591 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4592 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4593 // This means this code doesn't have to handle the case where "currentNetwork" no 4594 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4595 if (DBG) { 4596 log("Network " + newNetwork.name() + " stopped satisfying" + 4597 " request " + nri.request.requestId); 4598 } 4599 newNetwork.networkRequests.remove(nri.request.requestId); 4600 if (currentNetwork == newNetwork) { 4601 mNetworkForRequestId.remove(nri.request.requestId); 4602 sendUpdatedScoreToFactories(nri.request, 0); 4603 } else { 4604 if (nri.isRequest()) { 4605 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4606 newNetwork.name() + 4607 " without updating mNetworkForRequestId or factories!"); 4608 } 4609 } 4610 // TODO: technically, sending CALLBACK_LOST here is 4611 // incorrect if nri is a request (not a listen) and there 4612 // is a replacement network currently connected that can 4613 // satisfy it. However, the only capability that can both 4614 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4615 // so this code is only incorrect for a network that loses 4616 // the TRUSTED capability, which is a rare case. 4617 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST); 4618 } 4619 } 4620 // Linger any networks that are no longer needed. 4621 for (NetworkAgentInfo nai : affectedNetworks) { 4622 if (nai.lingering) { 4623 // Already lingered. Nothing to do. This can only happen if "nai" is in 4624 // "affectedNetworks" twice. The reasoning being that to get added to 4625 // "affectedNetworks", "nai" must have been satisfying a NetworkRequest 4626 // (i.e. not lingered) so it could have only been lingered by this loop. 4627 // unneeded(nai) will be false and we'll call unlinger() below which would 4628 // be bad, so handle it here. 4629 } else if (unneeded(nai)) { 4630 linger(nai); 4631 } else { 4632 // Clear nai.networkLingered we might have added above. 4633 unlinger(nai); 4634 } 4635 } 4636 if (isNewDefault) { 4637 // Notify system services that this network is up. 4638 makeDefault(newNetwork, oldDefaultNetwork); 4639 synchronized (ConnectivityService.this) { 4640 // have a new default network, release the transition wakelock in 4641 // a second if it's held. The second pause is to allow apps 4642 // to reconnect over the new network 4643 if (mNetTransitionWakeLock.isHeld()) { 4644 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4645 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4646 mNetTransitionWakeLockSerialNumber, 0), 4647 1000); 4648 } 4649 } 4650 } 4651 4652 // do this after the default net is switched, but 4653 // before LegacyTypeTracker sends legacy broadcasts 4654 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4655 4656 if (isNewDefault) { 4657 // Maintain the illusion: since the legacy API only 4658 // understands one network at a time, we must pretend 4659 // that the current default network disconnected before 4660 // the new one connected. 4661 if (oldDefaultNetwork != null) { 4662 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4663 oldDefaultNetwork, true); 4664 } 4665 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4666 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4667 notifyLockdownVpn(newNetwork); 4668 } 4669 4670 if (keep) { 4671 // Notify battery stats service about this network, both the normal 4672 // interface and any stacked links. 4673 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4674 try { 4675 final IBatteryStats bs = BatteryStatsService.getService(); 4676 final int type = newNetwork.networkInfo.getType(); 4677 4678 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4679 bs.noteNetworkInterfaceType(baseIface, type); 4680 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4681 final String stackedIface = stacked.getInterfaceName(); 4682 bs.noteNetworkInterfaceType(stackedIface, type); 4683 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4684 } 4685 } catch (RemoteException ignored) { 4686 } 4687 4688 // This has to happen after the notifyNetworkCallbacks as that tickles each 4689 // ConnectivityManager instance so that legacy requests correctly bind dns 4690 // requests to this network. The legacy users are listening for this bcast 4691 // and will generally do a dns request so they can ensureRouteToHost and if 4692 // they do that before the callbacks happen they'll use the default network. 4693 // 4694 // TODO: Is there still a race here? We send the broadcast 4695 // after sending the callback, but if the app can receive the 4696 // broadcast before the callback, it might still break. 4697 // 4698 // This *does* introduce a race where if the user uses the new api 4699 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4700 // they may get old info. Reverse this after the old startUsing api is removed. 4701 // This is on top of the multiple intent sequencing referenced in the todo above. 4702 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4703 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4704 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4705 // legacy type tracker filters out repeat adds 4706 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4707 } 4708 } 4709 4710 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4711 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4712 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4713 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4714 if (newNetwork.isVPN()) { 4715 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4716 } 4717 } 4718 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4719 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4720 if (unneeded(nai)) { 4721 if (DBG) log("Reaping " + nai.name()); 4722 teardownUnneededNetwork(nai); 4723 } 4724 } 4725 } 4726 } 4727 4728 /** 4729 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4730 * being disconnected. 4731 * @param changed If only one Network's score or capabilities have been modified since the last 4732 * time this function was called, pass this Network in this argument, otherwise pass 4733 * null. 4734 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4735 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4736 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4737 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4738 * network's score. 4739 */ 4740 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4741 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4742 // to avoid the slowness. It is not simply enough to process just "changed", for 4743 // example in the case where "changed"'s score decreases and another network should begin 4744 // satifying a NetworkRequest that "changed" currently satisfies. 4745 4746 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4747 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4748 // rematchNetworkAndRequests() handles. 4749 if (changed != null && oldScore < changed.getCurrentScore()) { 4750 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP); 4751 } else { 4752 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4753 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4754 // Rematch higher scoring networks first to prevent requests first matching a lower 4755 // scoring network and then a higher scoring network, which could produce multiple 4756 // callbacks and inadvertently unlinger networks. 4757 Arrays.sort(nais); 4758 for (NetworkAgentInfo nai : nais) { 4759 rematchNetworkAndRequests(nai, 4760 // Only reap the last time through the loop. Reaping before all rematching 4761 // is complete could incorrectly teardown a network that hasn't yet been 4762 // rematched. 4763 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4764 : ReapUnvalidatedNetworks.REAP); 4765 } 4766 } 4767 } 4768 4769 private void updateInetCondition(NetworkAgentInfo nai) { 4770 // Don't bother updating until we've graduated to validated at least once. 4771 if (!nai.everValidated) return; 4772 // For now only update icons for default connection. 4773 // TODO: Update WiFi and cellular icons separately. b/17237507 4774 if (!isDefaultNetwork(nai)) return; 4775 4776 int newInetCondition = nai.lastValidated ? 100 : 0; 4777 // Don't repeat publish. 4778 if (newInetCondition == mDefaultInetConditionPublished) return; 4779 4780 mDefaultInetConditionPublished = newInetCondition; 4781 sendInetConditionBroadcast(nai.networkInfo); 4782 } 4783 4784 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4785 if (mLockdownTracker != null) { 4786 if (nai != null && nai.isVPN()) { 4787 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4788 } else { 4789 mLockdownTracker.onNetworkInfoChanged(); 4790 } 4791 } 4792 } 4793 4794 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4795 NetworkInfo.State state = newInfo.getState(); 4796 NetworkInfo oldInfo = null; 4797 final int oldScore = networkAgent.getCurrentScore(); 4798 synchronized (networkAgent) { 4799 oldInfo = networkAgent.networkInfo; 4800 networkAgent.networkInfo = newInfo; 4801 } 4802 notifyLockdownVpn(networkAgent); 4803 4804 if (oldInfo != null && oldInfo.getState() == state) { 4805 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 4806 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 4807 notifyIfacesChangedForNetworkStats(); 4808 } else if (VDBG) log("ignoring duplicate network state non-change"); 4809 // In either case, no further work should be needed. 4810 return; 4811 } 4812 if (DBG) { 4813 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4814 (oldInfo == null ? "null" : oldInfo.getState()) + 4815 " to " + state); 4816 } 4817 4818 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4819 try { 4820 // This should never fail. Specifying an already in use NetID will cause failure. 4821 if (networkAgent.isVPN()) { 4822 mNetd.createVirtualNetwork(networkAgent.network.netId, 4823 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4824 (networkAgent.networkMisc == null || 4825 !networkAgent.networkMisc.allowBypass)); 4826 } else { 4827 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4828 networkAgent.networkCapabilities.hasCapability( 4829 NET_CAPABILITY_NOT_RESTRICTED) ? 4830 null : NetworkManagementService.PERMISSION_SYSTEM); 4831 } 4832 } catch (Exception e) { 4833 loge("Error creating network " + networkAgent.network.netId + ": " 4834 + e.getMessage()); 4835 return; 4836 } 4837 networkAgent.created = true; 4838 updateLinkProperties(networkAgent, null); 4839 notifyIfacesChangedForNetworkStats(); 4840 4841 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4842 scheduleUnvalidatedPrompt(networkAgent); 4843 4844 if (networkAgent.isVPN()) { 4845 // Temporarily disable the default proxy (not global). 4846 synchronized (mProxyLock) { 4847 if (!mDefaultProxyDisabled) { 4848 mDefaultProxyDisabled = true; 4849 if (mGlobalProxy == null && mDefaultProxy != null) { 4850 sendProxyBroadcast(null); 4851 } 4852 } 4853 } 4854 // TODO: support proxy per network. 4855 } 4856 4857 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 4858 // be communicated to a particular NetworkAgent depends only on the network's immutable, 4859 // capabilities, so it only needs to be done once on initial connect, not every time the 4860 // network's capabilities change. Note that we do this before rematching the network, 4861 // so we could decide to tear it down immediately afterwards. That's fine though - on 4862 // disconnection NetworkAgents should stop any signal strength monitoring they have been 4863 // doing. 4864 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 4865 4866 // Consider network even though it is not yet validated. 4867 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP); 4868 4869 // This has to happen after matching the requests, because callbacks are just requests. 4870 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4871 } else if (state == NetworkInfo.State.DISCONNECTED) { 4872 networkAgent.asyncChannel.disconnect(); 4873 if (networkAgent.isVPN()) { 4874 synchronized (mProxyLock) { 4875 if (mDefaultProxyDisabled) { 4876 mDefaultProxyDisabled = false; 4877 if (mGlobalProxy == null && mDefaultProxy != null) { 4878 sendProxyBroadcast(mDefaultProxy); 4879 } 4880 } 4881 } 4882 } 4883 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 4884 state == NetworkInfo.State.SUSPENDED) { 4885 // going into or coming out of SUSPEND: rescore and notify 4886 if (networkAgent.getCurrentScore() != oldScore) { 4887 rematchAllNetworksAndRequests(networkAgent, oldScore); 4888 } 4889 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 4890 ConnectivityManager.CALLBACK_SUSPENDED : 4891 ConnectivityManager.CALLBACK_RESUMED)); 4892 mLegacyTypeTracker.update(networkAgent); 4893 } 4894 } 4895 4896 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4897 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4898 if (score < 0) { 4899 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4900 "). Bumping score to min of 0"); 4901 score = 0; 4902 } 4903 4904 final int oldScore = nai.getCurrentScore(); 4905 nai.setCurrentScore(score); 4906 4907 rematchAllNetworksAndRequests(nai, oldScore); 4908 4909 sendUpdatedScoreToFactories(nai); 4910 } 4911 4912 // notify only this one new request of the current state 4913 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4914 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4915 // TODO - read state from monitor to decide what to send. 4916// if (nai.networkMonitor.isLingering()) { 4917// notifyType = NetworkCallbacks.LOSING; 4918// } else if (nai.networkMonitor.isEvaluating()) { 4919// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4920// } 4921 if (nri.mPendingIntent == null) { 4922 callCallbackForRequest(nri, nai, notifyType); 4923 } else { 4924 sendPendingIntentForRequest(nri, nai, notifyType); 4925 } 4926 } 4927 4928 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 4929 // The NetworkInfo we actually send out has no bearing on the real 4930 // state of affairs. For example, if the default connection is mobile, 4931 // and a request for HIPRI has just gone away, we need to pretend that 4932 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4933 // the state to DISCONNECTED, even though the network is of type MOBILE 4934 // and is still connected. 4935 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4936 info.setType(type); 4937 if (state != DetailedState.DISCONNECTED) { 4938 info.setDetailedState(state, null, info.getExtraInfo()); 4939 sendConnectedBroadcast(info); 4940 } else { 4941 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 4942 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4943 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4944 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4945 if (info.isFailover()) { 4946 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4947 nai.networkInfo.setFailover(false); 4948 } 4949 if (info.getReason() != null) { 4950 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4951 } 4952 if (info.getExtraInfo() != null) { 4953 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4954 } 4955 NetworkAgentInfo newDefaultAgent = null; 4956 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4957 newDefaultAgent = getDefaultNetwork(); 4958 if (newDefaultAgent != null) { 4959 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4960 newDefaultAgent.networkInfo); 4961 } else { 4962 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4963 } 4964 } 4965 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4966 mDefaultInetConditionPublished); 4967 sendStickyBroadcast(intent); 4968 if (newDefaultAgent != null) { 4969 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4970 } 4971 } 4972 } 4973 4974 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4975 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4976 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4977 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4978 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4979 if (VDBG) log(" sending notification for " + nr); 4980 if (nri.mPendingIntent == null) { 4981 callCallbackForRequest(nri, networkAgent, notifyType); 4982 } else { 4983 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4984 } 4985 } 4986 } 4987 4988 private String notifyTypeToName(int notifyType) { 4989 switch (notifyType) { 4990 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4991 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4992 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4993 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4994 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4995 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4996 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4997 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4998 } 4999 return "UNKNOWN"; 5000 } 5001 5002 /** 5003 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5004 * properties tracked by NetworkStatsService on an active iface has changed. 5005 */ 5006 private void notifyIfacesChangedForNetworkStats() { 5007 try { 5008 mStatsService.forceUpdateIfaces(); 5009 } catch (Exception ignored) { 5010 } 5011 } 5012 5013 @Override 5014 public boolean addVpnAddress(String address, int prefixLength) { 5015 throwIfLockdownEnabled(); 5016 int user = UserHandle.getUserId(Binder.getCallingUid()); 5017 synchronized (mVpns) { 5018 return mVpns.get(user).addAddress(address, prefixLength); 5019 } 5020 } 5021 5022 @Override 5023 public boolean removeVpnAddress(String address, int prefixLength) { 5024 throwIfLockdownEnabled(); 5025 int user = UserHandle.getUserId(Binder.getCallingUid()); 5026 synchronized (mVpns) { 5027 return mVpns.get(user).removeAddress(address, prefixLength); 5028 } 5029 } 5030 5031 @Override 5032 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5033 throwIfLockdownEnabled(); 5034 int user = UserHandle.getUserId(Binder.getCallingUid()); 5035 boolean success; 5036 synchronized (mVpns) { 5037 success = mVpns.get(user).setUnderlyingNetworks(networks); 5038 } 5039 if (success) { 5040 notifyIfacesChangedForNetworkStats(); 5041 } 5042 return success; 5043 } 5044 5045 @Override 5046 public String getCaptivePortalServerUrl() { 5047 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5048 } 5049 5050 @Override 5051 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5052 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5053 enforceKeepalivePermission(); 5054 mKeepaliveTracker.startNattKeepalive( 5055 getNetworkAgentInfoForNetwork(network), 5056 intervalSeconds, messenger, binder, 5057 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5058 } 5059 5060 @Override 5061 public void stopKeepalive(Network network, int slot) { 5062 mHandler.sendMessage(mHandler.obtainMessage( 5063 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5064 } 5065 5066 @Override 5067 public void factoryReset() { 5068 enforceConnectivityInternalPermission(); 5069 5070 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5071 return; 5072 } 5073 5074 final int userId = UserHandle.getCallingUserId(); 5075 5076 // Turn airplane mode off 5077 setAirplaneMode(false); 5078 5079 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5080 // Untether 5081 for (String tether : getTetheredIfaces()) { 5082 untether(tether); 5083 } 5084 } 5085 5086 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5087 // Turn VPN off 5088 VpnConfig vpnConfig = getVpnConfig(userId); 5089 if (vpnConfig != null) { 5090 if (vpnConfig.legacy) { 5091 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5092 } else { 5093 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5094 // in the future without user intervention. 5095 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5096 5097 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN, userId); 5098 } 5099 } 5100 } 5101 } 5102 5103 @VisibleForTesting 5104 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5105 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5106 return new NetworkMonitor(context, handler, nai, defaultRequest); 5107 } 5108 5109 private static void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5110 int newNetid = NETID_UNSET; 5111 int prevNetid = NETID_UNSET; 5112 int[] transports = new int[0]; 5113 boolean hadIPv4 = false; 5114 boolean hadIPv6 = false; 5115 5116 if (newNai != null) { 5117 newNetid = newNai.network.netId; 5118 transports = newNai.networkCapabilities.getTransportTypes(); 5119 } 5120 if (prevNai != null) { 5121 prevNetid = prevNai.network.netId; 5122 final LinkProperties lp = prevNai.linkProperties; 5123 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5124 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5125 } 5126 5127 DefaultNetworkEvent.logEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6); 5128 } 5129} 5130