ConnectivityService.java revision b89d33ee4467161cb270d765bd873efab781004d
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.ConnectivityServiceChangeEvent; 75import android.os.Binder; 76import android.os.Build; 77import android.os.Bundle; 78import android.os.FileUtils; 79import android.os.Handler; 80import android.os.HandlerThread; 81import android.os.IBinder; 82import android.os.INetworkManagementService; 83import android.os.Looper; 84import android.os.Message; 85import android.os.Messenger; 86import android.os.ParcelFileDescriptor; 87import android.os.PowerManager; 88import android.os.Process; 89import android.os.RemoteException; 90import android.os.ResultReceiver; 91import android.os.SystemProperties; 92import android.os.UserHandle; 93import android.os.UserManager; 94import android.provider.Settings; 95import android.security.Credentials; 96import android.security.KeyStore; 97import android.telephony.TelephonyManager; 98import android.text.TextUtils; 99import android.util.LocalLog; 100import android.util.LocalLog.ReadOnlyLocalLog; 101import android.util.Pair; 102import android.util.Slog; 103import android.util.SparseArray; 104import android.util.SparseBooleanArray; 105import android.util.SparseIntArray; 106import android.util.Xml; 107 108import com.android.internal.R; 109import com.android.internal.annotations.GuardedBy; 110import com.android.internal.annotations.VisibleForTesting; 111import com.android.internal.app.IBatteryStats; 112import com.android.internal.net.LegacyVpnInfo; 113import com.android.internal.net.NetworkStatsFactory; 114import com.android.internal.net.VpnConfig; 115import com.android.internal.net.VpnInfo; 116import com.android.internal.net.VpnProfile; 117import com.android.internal.util.AsyncChannel; 118import com.android.internal.util.IndentingPrintWriter; 119import com.android.internal.util.MessageUtils; 120import com.android.internal.util.XmlUtils; 121import com.android.server.am.BatteryStatsService; 122import com.android.server.connectivity.DataConnectionStats; 123import com.android.server.connectivity.KeepaliveTracker; 124import com.android.server.connectivity.NetworkDiagnostics; 125import com.android.server.connectivity.Nat464Xlat; 126import com.android.server.connectivity.NetworkAgentInfo; 127import com.android.server.connectivity.NetworkMonitor; 128import com.android.server.connectivity.PacManager; 129import com.android.server.connectivity.PermissionMonitor; 130import com.android.server.connectivity.Tethering; 131import com.android.server.connectivity.Vpn; 132import com.android.server.net.BaseNetworkObserver; 133import com.android.server.net.LockdownVpnTracker; 134import com.google.android.collect.Lists; 135import com.google.android.collect.Sets; 136 137import org.xmlpull.v1.XmlPullParser; 138import org.xmlpull.v1.XmlPullParserException; 139 140import java.io.File; 141import java.io.FileDescriptor; 142import java.io.FileNotFoundException; 143import java.io.FileReader; 144import java.io.IOException; 145import java.io.PrintWriter; 146import java.net.Inet4Address; 147import java.net.InetAddress; 148import java.net.UnknownHostException; 149import java.util.ArrayDeque; 150import java.util.ArrayList; 151import java.util.Arrays; 152import java.util.Collection; 153import java.util.HashMap; 154import java.util.HashSet; 155import java.util.SortedSet; 156import java.util.TreeSet; 157import java.util.List; 158import java.util.Map; 159import java.util.Objects; 160 161/** 162 * @hide 163 */ 164public class ConnectivityService extends IConnectivityManager.Stub 165 implements PendingIntent.OnFinished { 166 private static final String TAG = "ConnectivityService"; 167 168 private static final boolean DBG = false; 169 private static final boolean VDBG = false; 170 171 private static final boolean LOGD_RULES = false; 172 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 173 174 // TODO: create better separation between radio types and network types 175 176 // how long to wait before switching back to a radio's default network 177 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 178 // system property that can override the above value 179 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 180 "android.telephony.apn-restore"; 181 182 // How long to wait before putting up a "This network doesn't have an Internet connection, 183 // connect anyway?" dialog after the user selects a network that doesn't validate. 184 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 185 186 // How long to delay to removal of a pending intent based request. 187 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 188 private final int mReleasePendingIntentDelayMs; 189 190 private Tethering mTethering; 191 192 private final PermissionMonitor mPermissionMonitor; 193 194 private KeyStore mKeyStore; 195 196 @GuardedBy("mVpns") 197 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 198 199 private boolean mLockdownEnabled; 200 private LockdownVpnTracker mLockdownTracker; 201 202 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 203 private Object mRulesLock = new Object(); 204 /** Currently active network rules by UID. */ 205 private SparseIntArray mUidRules = new SparseIntArray(); 206 /** Set of ifaces that are costly. */ 207 private HashSet<String> mMeteredIfaces = Sets.newHashSet(); 208 209 final private Context mContext; 210 private int mNetworkPreference; 211 // 0 is full bad, 100 is full good 212 private int mDefaultInetConditionPublished = 0; 213 214 private int mNumDnsEntries; 215 216 private boolean mTestMode; 217 private static ConnectivityService sServiceInstance; 218 219 private INetworkManagementService mNetd; 220 private INetworkStatsService mStatsService; 221 private INetworkPolicyManager mPolicyManager; 222 223 private String mCurrentTcpBufferSizes; 224 225 private static final int ENABLED = 1; 226 private static final int DISABLED = 0; 227 228 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 229 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class }); 230 231 private enum ReapUnvalidatedNetworks { 232 // Tear down networks that have no chance (e.g. even if validated) of becoming 233 // the highest scoring network satisfying a NetworkRequest. This should be passed when 234 // all networks have been rematched against all NetworkRequests. 235 REAP, 236 // Don't reap networks. This should be passed when some networks have not yet been 237 // rematched against all NetworkRequests. 238 DONT_REAP 239 }; 240 241 /** 242 * used internally to change our mobile data enabled flag 243 */ 244 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 245 246 /** 247 * used internally to clear a wakelock when transitioning 248 * from one net to another. Clear happens when we get a new 249 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 250 * after a timeout if no network is found (typically 1 min). 251 */ 252 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 253 254 /** 255 * used internally to reload global proxy settings 256 */ 257 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 258 259 /** 260 * PAC manager has received new port. 261 */ 262 private static final int EVENT_PROXY_HAS_CHANGED = 16; 263 264 /** 265 * used internally when registering NetworkFactories 266 * obj = NetworkFactoryInfo 267 */ 268 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 269 270 /** 271 * used internally when registering NetworkAgents 272 * obj = Messenger 273 */ 274 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 275 276 /** 277 * used to add a network request 278 * includes a NetworkRequestInfo 279 */ 280 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 281 282 /** 283 * indicates a timeout period is over - check if we had a network yet or not 284 * and if not, call the timeout calback (but leave the request live until they 285 * cancel it. 286 * includes a NetworkRequestInfo 287 */ 288 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 289 290 /** 291 * used to add a network listener - no request 292 * includes a NetworkRequestInfo 293 */ 294 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 295 296 /** 297 * used to remove a network request, either a listener or a real request 298 * arg1 = UID of caller 299 * obj = NetworkRequest 300 */ 301 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 302 303 /** 304 * used internally when registering NetworkFactories 305 * obj = Messenger 306 */ 307 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 308 309 /** 310 * used internally to expire a wakelock when transitioning 311 * from one net to another. Expire happens when we fail to find 312 * a new network (typically after 1 minute) - 313 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 314 * a replacement network. 315 */ 316 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 317 318 /** 319 * Used internally to indicate the system is ready. 320 */ 321 private static final int EVENT_SYSTEM_READY = 25; 322 323 /** 324 * used to add a network request with a pending intent 325 * obj = NetworkRequestInfo 326 */ 327 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 328 329 /** 330 * used to remove a pending intent and its associated network request. 331 * arg1 = UID of caller 332 * obj = PendingIntent 333 */ 334 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 335 336 /** 337 * used to specify whether a network should be used even if unvalidated. 338 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 339 * arg2 = whether to remember this choice in the future (1 or 0) 340 * obj = network 341 */ 342 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 343 344 /** 345 * used to ask the user to confirm a connection to an unvalidated network. 346 * obj = network 347 */ 348 private static final int EVENT_PROMPT_UNVALIDATED = 29; 349 350 /** 351 * used internally to (re)configure mobile data always-on settings. 352 */ 353 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 354 355 /** 356 * used to add a network listener with a pending intent 357 * obj = NetworkRequestInfo 358 */ 359 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 360 361 /** Handler thread used for both of the handlers below. */ 362 @VisibleForTesting 363 protected final HandlerThread mHandlerThread; 364 /** Handler used for internal events. */ 365 final private InternalHandler mHandler; 366 /** Handler used for incoming {@link NetworkStateTracker} events. */ 367 final private NetworkStateTrackerHandler mTrackerHandler; 368 369 private boolean mSystemReady; 370 private Intent mInitialBroadcast; 371 372 private PowerManager.WakeLock mNetTransitionWakeLock; 373 private String mNetTransitionWakeLockCausedBy = ""; 374 private int mNetTransitionWakeLockSerialNumber; 375 private int mNetTransitionWakeLockTimeout; 376 private final PowerManager.WakeLock mPendingIntentWakeLock; 377 378 // used in DBG mode to track inet condition reports 379 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 380 private ArrayList mInetLog; 381 382 // track the current default http proxy - tell the world if we get a new one (real change) 383 private volatile ProxyInfo mDefaultProxy = null; 384 private Object mProxyLock = new Object(); 385 private boolean mDefaultProxyDisabled = false; 386 387 // track the global proxy. 388 private ProxyInfo mGlobalProxy = null; 389 390 private PacManager mPacManager = null; 391 392 final private SettingsObserver mSettingsObserver; 393 394 private UserManager mUserManager; 395 396 NetworkConfig[] mNetConfigs; 397 int mNetworksDefined; 398 399 // the set of network types that can only be enabled by system/sig apps 400 List mProtectedNetworks; 401 402 private DataConnectionStats mDataConnectionStats; 403 404 TelephonyManager mTelephonyManager; 405 406 private KeepaliveTracker mKeepaliveTracker; 407 408 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 409 private final static int MIN_NET_ID = 100; // some reserved marks 410 private final static int MAX_NET_ID = 65535; 411 private int mNextNetId = MIN_NET_ID; 412 413 // sequence number of NetworkRequests 414 private int mNextNetworkRequestId = 1; 415 416 // NetworkRequest activity String log entries. 417 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 418 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 419 420 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 421 private static final int MAX_VALIDATION_LOGS = 10; 422 private final ArrayDeque<Pair<Network,ReadOnlyLocalLog>> mValidationLogs = 423 new ArrayDeque<Pair<Network,ReadOnlyLocalLog>>(MAX_VALIDATION_LOGS); 424 425 private void addValidationLogs(ReadOnlyLocalLog log, Network network) { 426 synchronized(mValidationLogs) { 427 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 428 mValidationLogs.removeLast(); 429 } 430 mValidationLogs.addFirst(new Pair(network, log)); 431 } 432 } 433 434 /** 435 * Implements support for the legacy "one network per network type" model. 436 * 437 * We used to have a static array of NetworkStateTrackers, one for each 438 * network type, but that doesn't work any more now that we can have, 439 * for example, more that one wifi network. This class stores all the 440 * NetworkAgentInfo objects that support a given type, but the legacy 441 * API will only see the first one. 442 * 443 * It serves two main purposes: 444 * 445 * 1. Provide information about "the network for a given type" (since this 446 * API only supports one). 447 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 448 * the first network for a given type changes, or if the default network 449 * changes. 450 */ 451 private class LegacyTypeTracker { 452 453 private static final boolean DBG = false; 454 private static final boolean VDBG = false; 455 private static final String TAG = "CSLegacyTypeTracker"; 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 // This class needs its own log method because it has a different TAG. 610 private void log(String s) { 611 Slog.d(TAG, s); 612 } 613 614 } 615 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 616 617 @VisibleForTesting 618 protected HandlerThread createHandlerThread() { 619 return new HandlerThread("ConnectivityServiceThread"); 620 } 621 622 public ConnectivityService(Context context, INetworkManagementService netManager, 623 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 624 if (DBG) log("ConnectivityService starting up"); 625 626 mDefaultRequest = createInternetRequestForTransport(-1); 627 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, 628 new Binder(), NetworkRequestType.REQUEST); 629 mNetworkRequests.put(mDefaultRequest, defaultNRI); 630 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 631 632 mDefaultMobileDataRequest = createInternetRequestForTransport( 633 NetworkCapabilities.TRANSPORT_CELLULAR); 634 635 mHandlerThread = createHandlerThread(); 636 mHandlerThread.start(); 637 mHandler = new InternalHandler(mHandlerThread.getLooper()); 638 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 639 640 // setup our unique device name 641 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 642 String id = Settings.Secure.getString(context.getContentResolver(), 643 Settings.Secure.ANDROID_ID); 644 if (id != null && id.length() > 0) { 645 String name = new String("android-").concat(id); 646 SystemProperties.set("net.hostname", name); 647 } 648 } 649 650 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 651 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 652 653 mContext = checkNotNull(context, "missing Context"); 654 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 655 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 656 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 657 mKeyStore = KeyStore.getInstance(); 658 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 659 660 try { 661 mPolicyManager.registerListener(mPolicyListener); 662 } catch (RemoteException e) { 663 // ouch, no rules updates means some processes may never get network 664 loge("unable to register INetworkPolicyListener" + e.toString()); 665 } 666 667 final PowerManager powerManager = (PowerManager) context.getSystemService( 668 Context.POWER_SERVICE); 669 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 670 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 671 com.android.internal.R.integer.config_networkTransitionTimeout); 672 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 673 674 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 675 676 // TODO: What is the "correct" way to do determine if this is a wifi only device? 677 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 678 log("wifiOnly=" + wifiOnly); 679 String[] naStrings = context.getResources().getStringArray( 680 com.android.internal.R.array.networkAttributes); 681 for (String naString : naStrings) { 682 try { 683 NetworkConfig n = new NetworkConfig(naString); 684 if (VDBG) log("naString=" + naString + " config=" + n); 685 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 686 loge("Error in networkAttributes - ignoring attempt to define type " + 687 n.type); 688 continue; 689 } 690 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 691 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 692 n.type); 693 continue; 694 } 695 if (mNetConfigs[n.type] != null) { 696 loge("Error in networkAttributes - ignoring attempt to redefine type " + 697 n.type); 698 continue; 699 } 700 mLegacyTypeTracker.addSupportedType(n.type); 701 702 mNetConfigs[n.type] = n; 703 mNetworksDefined++; 704 } catch(Exception e) { 705 // ignore it - leave the entry null 706 } 707 } 708 709 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 710 if (mNetConfigs[TYPE_VPN] == null) { 711 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 712 // don't need to add TYPE_VPN to mNetConfigs. 713 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 714 mNetworksDefined++; // used only in the log() statement below. 715 } 716 717 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 718 719 mProtectedNetworks = new ArrayList<Integer>(); 720 int[] protectedNetworks = context.getResources().getIntArray( 721 com.android.internal.R.array.config_protectedNetworks); 722 for (int p : protectedNetworks) { 723 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 724 mProtectedNetworks.add(p); 725 } else { 726 if (DBG) loge("Ignoring protectedNetwork " + p); 727 } 728 } 729 730 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 731 && SystemProperties.get("ro.build.type").equals("eng"); 732 733 mTethering = new Tethering(mContext, mNetd, statsService); 734 735 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 736 737 //set up the listener for user state for creating user VPNs 738 IntentFilter intentFilter = new IntentFilter(); 739 intentFilter.addAction(Intent.ACTION_USER_STARTING); 740 intentFilter.addAction(Intent.ACTION_USER_STOPPING); 741 intentFilter.addAction(Intent.ACTION_USER_ADDED); 742 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 743 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 744 mContext.registerReceiverAsUser( 745 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 746 747 try { 748 mNetd.registerObserver(mTethering); 749 mNetd.registerObserver(mDataActivityObserver); 750 } catch (RemoteException e) { 751 loge("Error registering observer :" + e); 752 } 753 754 if (DBG) { 755 mInetLog = new ArrayList(); 756 } 757 758 mSettingsObserver = new SettingsObserver(mContext, mHandler); 759 registerSettingsCallbacks(); 760 761 mDataConnectionStats = new DataConnectionStats(mContext); 762 mDataConnectionStats.startMonitoring(); 763 764 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 765 766 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 767 768 mKeepaliveTracker = new KeepaliveTracker(mHandler); 769 } 770 771 private NetworkRequest createInternetRequestForTransport(int transportType) { 772 NetworkCapabilities netCap = new NetworkCapabilities(); 773 netCap.addCapability(NET_CAPABILITY_INTERNET); 774 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 775 if (transportType > -1) { 776 netCap.addTransportType(transportType); 777 } 778 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 779 } 780 781 private void handleMobileDataAlwaysOn() { 782 final boolean enable = (Settings.Global.getInt( 783 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 784 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 785 if (enable == isEnabled) { 786 return; // Nothing to do. 787 } 788 789 if (enable) { 790 handleRegisterNetworkRequest(new NetworkRequestInfo( 791 null, mDefaultMobileDataRequest, new Binder(), NetworkRequestType.REQUEST)); 792 } else { 793 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 794 } 795 } 796 797 private void registerSettingsCallbacks() { 798 // Watch for global HTTP proxy changes. 799 mSettingsObserver.observe( 800 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 801 EVENT_APPLY_GLOBAL_HTTP_PROXY); 802 803 // Watch for whether or not to keep mobile data always on. 804 mSettingsObserver.observe( 805 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 806 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 807 } 808 809 private synchronized int nextNetworkRequestId() { 810 return mNextNetworkRequestId++; 811 } 812 813 @VisibleForTesting 814 protected int reserveNetId() { 815 synchronized (mNetworkForNetId) { 816 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 817 int netId = mNextNetId; 818 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 819 // Make sure NetID unused. http://b/16815182 820 if (!mNetIdInUse.get(netId)) { 821 mNetIdInUse.put(netId, true); 822 return netId; 823 } 824 } 825 } 826 throw new IllegalStateException("No free netIds"); 827 } 828 829 private NetworkState getFilteredNetworkState(int networkType, int uid) { 830 NetworkInfo info = null; 831 LinkProperties lp = null; 832 NetworkCapabilities nc = null; 833 Network network = null; 834 String subscriberId = null; 835 836 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 837 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 838 if (nai != null) { 839 synchronized (nai) { 840 info = new NetworkInfo(nai.networkInfo); 841 lp = new LinkProperties(nai.linkProperties); 842 nc = new NetworkCapabilities(nai.networkCapabilities); 843 // Network objects are outwardly immutable so there is no point to duplicating. 844 // Duplicating also precludes sharing socket factories and connection pools. 845 network = nai.network; 846 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 847 } 848 info.setType(networkType); 849 } else { 850 info = new NetworkInfo(networkType, 0, getNetworkTypeName(networkType), ""); 851 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 852 info.setIsAvailable(true); 853 lp = new LinkProperties(); 854 nc = new NetworkCapabilities(); 855 network = null; 856 } 857 info = getFilteredNetworkInfo(info, lp, uid); 858 } 859 860 return new NetworkState(info, lp, nc, network, subscriberId, null); 861 } 862 863 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 864 if (network == null) { 865 return null; 866 } 867 synchronized (mNetworkForNetId) { 868 return mNetworkForNetId.get(network.netId); 869 } 870 }; 871 872 private Network[] getVpnUnderlyingNetworks(int uid) { 873 if (!mLockdownEnabled) { 874 int user = UserHandle.getUserId(uid); 875 synchronized (mVpns) { 876 Vpn vpn = mVpns.get(user); 877 if (vpn != null && vpn.appliesToUid(uid)) { 878 return vpn.getUnderlyingNetworks(); 879 } 880 } 881 } 882 return null; 883 } 884 885 private NetworkState getUnfilteredActiveNetworkState(int uid) { 886 NetworkInfo info = null; 887 LinkProperties lp = null; 888 NetworkCapabilities nc = null; 889 Network network = null; 890 String subscriberId = null; 891 892 NetworkAgentInfo nai = getDefaultNetwork(); 893 894 final Network[] networks = getVpnUnderlyingNetworks(uid); 895 if (networks != null) { 896 // getUnderlyingNetworks() returns: 897 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 898 // empty array => the VPN explicitly said "no default network". 899 // non-empty array => the VPN specified one or more default networks; we use the 900 // first one. 901 if (networks.length > 0) { 902 nai = getNetworkAgentInfoForNetwork(networks[0]); 903 } else { 904 nai = null; 905 } 906 } 907 908 if (nai != null) { 909 synchronized (nai) { 910 info = new NetworkInfo(nai.networkInfo); 911 lp = new LinkProperties(nai.linkProperties); 912 nc = new NetworkCapabilities(nai.networkCapabilities); 913 // Network objects are outwardly immutable so there is no point to duplicating. 914 // Duplicating also precludes sharing socket factories and connection pools. 915 network = nai.network; 916 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 917 } 918 } 919 920 return new NetworkState(info, lp, nc, network, subscriberId, null); 921 } 922 923 /** 924 * Check if UID should be blocked from using the network with the given LinkProperties. 925 */ 926 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 927 final boolean networkCostly; 928 final int uidRules; 929 930 final String iface = (lp == null ? "" : lp.getInterfaceName()); 931 synchronized (mRulesLock) { 932 networkCostly = mMeteredIfaces.contains(iface); 933 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 934 } 935 936 if (uidRules == RULE_REJECT_ALL) { 937 return true; 938 } else if ((uidRules == RULE_REJECT_METERED) && networkCostly) { 939 return true; 940 } else { 941 return false; 942 } 943 } 944 945 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 946 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) return; 947 boolean removed = false; 948 boolean added = false; 949 synchronized (mBlockedAppUids) { 950 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 951 added = true; 952 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 953 removed = true; 954 } 955 } 956 if (added) log("Returning blocked NetworkInfo to uid=" + uid); 957 else if (removed) log("Returning unblocked NetworkInfo to uid=" + uid); 958 } 959 960 /** 961 * Return a filtered {@link NetworkInfo}, potentially marked 962 * {@link DetailedState#BLOCKED} based on 963 * {@link #isNetworkWithLinkPropertiesBlocked}. 964 */ 965 private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, LinkProperties lp, int uid) { 966 if (info != null && isNetworkWithLinkPropertiesBlocked(lp, uid)) { 967 // network is blocked; clone and override state 968 info = new NetworkInfo(info); 969 info.setDetailedState(DetailedState.BLOCKED, null, null); 970 } 971 if (info != null && mLockdownTracker != null) { 972 info = mLockdownTracker.augmentNetworkInfo(info); 973 if (VDBG) log("returning Locked NetworkInfo"); 974 } 975 return info; 976 } 977 978 /** 979 * Return NetworkInfo for the active (i.e., connected) network interface. 980 * It is assumed that at most one network is active at a time. If more 981 * than one is active, it is indeterminate which will be returned. 982 * @return the info for the active network, or {@code null} if none is 983 * active 984 */ 985 @Override 986 public NetworkInfo getActiveNetworkInfo() { 987 enforceAccessPermission(); 988 final int uid = Binder.getCallingUid(); 989 NetworkState state = getUnfilteredActiveNetworkState(uid); 990 NetworkInfo ni = getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 991 maybeLogBlockedNetworkInfo(ni, uid); 992 return ni; 993 } 994 995 @Override 996 public Network getActiveNetwork() { 997 enforceAccessPermission(); 998 return getActiveNetworkForUidInternal(Binder.getCallingUid()); 999 } 1000 1001 @Override 1002 public Network getActiveNetworkForUid(int uid) { 1003 enforceConnectivityInternalPermission(); 1004 return getActiveNetworkForUidInternal(uid); 1005 } 1006 1007 private Network getActiveNetworkForUidInternal(final int uid) { 1008 final int user = UserHandle.getUserId(uid); 1009 int vpnNetId = NETID_UNSET; 1010 synchronized (mVpns) { 1011 final Vpn vpn = mVpns.get(user); 1012 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1013 } 1014 NetworkAgentInfo nai; 1015 if (vpnNetId != NETID_UNSET) { 1016 synchronized (mNetworkForNetId) { 1017 nai = mNetworkForNetId.get(vpnNetId); 1018 } 1019 if (nai != null) return nai.network; 1020 } 1021 nai = getDefaultNetwork(); 1022 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 1023 return nai != null ? nai.network : null; 1024 } 1025 1026 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1027 enforceAccessPermission(); 1028 final int uid = Binder.getCallingUid(); 1029 NetworkState state = getUnfilteredActiveNetworkState(uid); 1030 return state.networkInfo; 1031 } 1032 1033 @Override 1034 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 1035 enforceConnectivityInternalPermission(); 1036 NetworkState state = getUnfilteredActiveNetworkState(uid); 1037 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1038 } 1039 1040 @Override 1041 public NetworkInfo getNetworkInfo(int networkType) { 1042 enforceAccessPermission(); 1043 final int uid = Binder.getCallingUid(); 1044 if (getVpnUnderlyingNetworks(uid) != null) { 1045 // A VPN is active, so we may need to return one of its underlying networks. This 1046 // information is not available in LegacyTypeTracker, so we have to get it from 1047 // getUnfilteredActiveNetworkState. 1048 NetworkState state = getUnfilteredActiveNetworkState(uid); 1049 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1050 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1051 } 1052 } 1053 NetworkState state = getFilteredNetworkState(networkType, uid); 1054 return state.networkInfo; 1055 } 1056 1057 @Override 1058 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1059 enforceAccessPermission(); 1060 final int uid = Binder.getCallingUid(); 1061 NetworkInfo info = null; 1062 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1063 if (nai != null) { 1064 synchronized (nai) { 1065 info = new NetworkInfo(nai.networkInfo); 1066 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1067 } 1068 } 1069 return info; 1070 } 1071 1072 @Override 1073 public NetworkInfo[] getAllNetworkInfo() { 1074 enforceAccessPermission(); 1075 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1076 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1077 networkType++) { 1078 NetworkInfo info = getNetworkInfo(networkType); 1079 if (info != null) { 1080 result.add(info); 1081 } 1082 } 1083 return result.toArray(new NetworkInfo[result.size()]); 1084 } 1085 1086 @Override 1087 public Network getNetworkForType(int networkType) { 1088 enforceAccessPermission(); 1089 final int uid = Binder.getCallingUid(); 1090 NetworkState state = getFilteredNetworkState(networkType, uid); 1091 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1092 return state.network; 1093 } 1094 return null; 1095 } 1096 1097 @Override 1098 public Network[] getAllNetworks() { 1099 enforceAccessPermission(); 1100 synchronized (mNetworkForNetId) { 1101 final Network[] result = new Network[mNetworkForNetId.size()]; 1102 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1103 result[i] = mNetworkForNetId.valueAt(i).network; 1104 } 1105 return result; 1106 } 1107 } 1108 1109 @Override 1110 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1111 // The basic principle is: if an app's traffic could possibly go over a 1112 // network, without the app doing anything multinetwork-specific, 1113 // (hence, by "default"), then include that network's capabilities in 1114 // the array. 1115 // 1116 // In the normal case, app traffic only goes over the system's default 1117 // network connection, so that's the only network returned. 1118 // 1119 // With a VPN in force, some app traffic may go into the VPN, and thus 1120 // over whatever underlying networks the VPN specifies, while other app 1121 // traffic may go over the system default network (e.g.: a split-tunnel 1122 // VPN, or an app disallowed by the VPN), so the set of networks 1123 // returned includes the VPN's underlying networks and the system 1124 // default. 1125 enforceAccessPermission(); 1126 1127 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1128 1129 NetworkAgentInfo nai = getDefaultNetwork(); 1130 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1131 if (nc != null) { 1132 result.put(nai.network, nc); 1133 } 1134 1135 if (!mLockdownEnabled) { 1136 synchronized (mVpns) { 1137 Vpn vpn = mVpns.get(userId); 1138 if (vpn != null) { 1139 Network[] networks = vpn.getUnderlyingNetworks(); 1140 if (networks != null) { 1141 for (Network network : networks) { 1142 nai = getNetworkAgentInfoForNetwork(network); 1143 nc = getNetworkCapabilitiesInternal(nai); 1144 if (nc != null) { 1145 result.put(network, nc); 1146 } 1147 } 1148 } 1149 } 1150 } 1151 } 1152 1153 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1154 out = result.values().toArray(out); 1155 return out; 1156 } 1157 1158 @Override 1159 public boolean isNetworkSupported(int networkType) { 1160 enforceAccessPermission(); 1161 return mLegacyTypeTracker.isTypeSupported(networkType); 1162 } 1163 1164 /** 1165 * Return LinkProperties for the active (i.e., connected) default 1166 * network interface. It is assumed that at most one default network 1167 * is active at a time. If more than one is active, it is indeterminate 1168 * which will be returned. 1169 * @return the ip properties for the active network, or {@code null} if 1170 * none is active 1171 */ 1172 @Override 1173 public LinkProperties getActiveLinkProperties() { 1174 enforceAccessPermission(); 1175 final int uid = Binder.getCallingUid(); 1176 NetworkState state = getUnfilteredActiveNetworkState(uid); 1177 return state.linkProperties; 1178 } 1179 1180 @Override 1181 public LinkProperties getLinkPropertiesForType(int networkType) { 1182 enforceAccessPermission(); 1183 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1184 if (nai != null) { 1185 synchronized (nai) { 1186 return new LinkProperties(nai.linkProperties); 1187 } 1188 } 1189 return null; 1190 } 1191 1192 // TODO - this should be ALL networks 1193 @Override 1194 public LinkProperties getLinkProperties(Network network) { 1195 enforceAccessPermission(); 1196 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1197 if (nai != null) { 1198 synchronized (nai) { 1199 return new LinkProperties(nai.linkProperties); 1200 } 1201 } 1202 return null; 1203 } 1204 1205 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1206 if (nai != null) { 1207 synchronized (nai) { 1208 if (nai.networkCapabilities != null) { 1209 return new NetworkCapabilities(nai.networkCapabilities); 1210 } 1211 } 1212 } 1213 return null; 1214 } 1215 1216 @Override 1217 public NetworkCapabilities getNetworkCapabilities(Network network) { 1218 enforceAccessPermission(); 1219 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1220 } 1221 1222 @Override 1223 public NetworkState[] getAllNetworkState() { 1224 // Require internal since we're handing out IMSI details 1225 enforceConnectivityInternalPermission(); 1226 1227 final ArrayList<NetworkState> result = Lists.newArrayList(); 1228 for (Network network : getAllNetworks()) { 1229 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1230 if (nai != null) { 1231 synchronized (nai) { 1232 final String subscriberId = (nai.networkMisc != null) 1233 ? nai.networkMisc.subscriberId : null; 1234 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1235 nai.networkCapabilities, network, subscriberId, null)); 1236 } 1237 } 1238 } 1239 return result.toArray(new NetworkState[result.size()]); 1240 } 1241 1242 @Override 1243 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1244 enforceAccessPermission(); 1245 final int uid = Binder.getCallingUid(); 1246 final long token = Binder.clearCallingIdentity(); 1247 try { 1248 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1249 if (state.networkInfo != null) { 1250 try { 1251 return mPolicyManager.getNetworkQuotaInfo(state); 1252 } catch (RemoteException e) { 1253 } 1254 } 1255 return null; 1256 } finally { 1257 Binder.restoreCallingIdentity(token); 1258 } 1259 } 1260 1261 @Override 1262 public boolean isActiveNetworkMetered() { 1263 enforceAccessPermission(); 1264 final int uid = Binder.getCallingUid(); 1265 final long token = Binder.clearCallingIdentity(); 1266 try { 1267 return isActiveNetworkMeteredUnchecked(uid); 1268 } finally { 1269 Binder.restoreCallingIdentity(token); 1270 } 1271 } 1272 1273 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1274 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1275 if (state.networkInfo != null) { 1276 try { 1277 return mPolicyManager.isNetworkMetered(state); 1278 } catch (RemoteException e) { 1279 } 1280 } 1281 return false; 1282 } 1283 1284 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1285 @Override 1286 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1287 int deviceType = Integer.parseInt(label); 1288 sendDataActivityBroadcast(deviceType, active, tsNanos); 1289 } 1290 }; 1291 1292 /** 1293 * Ensure that a network route exists to deliver traffic to the specified 1294 * host via the specified network interface. 1295 * @param networkType the type of the network over which traffic to the 1296 * specified host is to be routed 1297 * @param hostAddress the IP address of the host to which the route is 1298 * desired 1299 * @return {@code true} on success, {@code false} on failure 1300 */ 1301 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1302 enforceChangePermission(); 1303 if (mProtectedNetworks.contains(networkType)) { 1304 enforceConnectivityInternalPermission(); 1305 } 1306 1307 InetAddress addr; 1308 try { 1309 addr = InetAddress.getByAddress(hostAddress); 1310 } catch (UnknownHostException e) { 1311 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1312 return false; 1313 } 1314 1315 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1316 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1317 return false; 1318 } 1319 1320 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1321 if (nai == null) { 1322 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1323 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1324 } else { 1325 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1326 } 1327 return false; 1328 } 1329 1330 DetailedState netState; 1331 synchronized (nai) { 1332 netState = nai.networkInfo.getDetailedState(); 1333 } 1334 1335 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1336 if (VDBG) { 1337 log("requestRouteToHostAddress on down network " 1338 + "(" + networkType + ") - dropped" 1339 + " netState=" + netState); 1340 } 1341 return false; 1342 } 1343 1344 final int uid = Binder.getCallingUid(); 1345 final long token = Binder.clearCallingIdentity(); 1346 try { 1347 LinkProperties lp; 1348 int netId; 1349 synchronized (nai) { 1350 lp = nai.linkProperties; 1351 netId = nai.network.netId; 1352 } 1353 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1354 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1355 return ok; 1356 } finally { 1357 Binder.restoreCallingIdentity(token); 1358 } 1359 } 1360 1361 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1362 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1363 if (bestRoute == null) { 1364 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1365 } else { 1366 String iface = bestRoute.getInterface(); 1367 if (bestRoute.getGateway().equals(addr)) { 1368 // if there is no better route, add the implied hostroute for our gateway 1369 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1370 } else { 1371 // if we will connect to this through another route, add a direct route 1372 // to it's gateway 1373 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1374 } 1375 } 1376 if (DBG) log("Adding legacy route " + bestRoute + 1377 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1378 try { 1379 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1380 } catch (Exception e) { 1381 // never crash - catch them all 1382 if (DBG) loge("Exception trying to add a route: " + e); 1383 return false; 1384 } 1385 return true; 1386 } 1387 1388 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1389 @Override 1390 public void onUidRulesChanged(int uid, int uidRules) { 1391 // caller is NPMS, since we only register with them 1392 if (LOGD_RULES) { 1393 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1394 } 1395 1396 synchronized (mRulesLock) { 1397 // skip update when we've already applied rules 1398 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1399 if (oldRules == uidRules) return; 1400 1401 mUidRules.put(uid, uidRules); 1402 } 1403 1404 // TODO: notify UID when it has requested targeted updates 1405 } 1406 1407 @Override 1408 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1409 // caller is NPMS, since we only register with them 1410 if (LOGD_RULES) { 1411 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1412 } 1413 1414 synchronized (mRulesLock) { 1415 mMeteredIfaces.clear(); 1416 for (String iface : meteredIfaces) { 1417 mMeteredIfaces.add(iface); 1418 } 1419 } 1420 } 1421 1422 @Override 1423 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1424 // caller is NPMS, since we only register with them 1425 if (LOGD_RULES) { 1426 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1427 } 1428 } 1429 }; 1430 1431 /** 1432 * Require that the caller is either in the same user or has appropriate permission to interact 1433 * across users. 1434 * 1435 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1436 */ 1437 private void enforceCrossUserPermission(int userId) { 1438 if (userId == UserHandle.getCallingUserId()) { 1439 // Not a cross-user call. 1440 return; 1441 } 1442 mContext.enforceCallingOrSelfPermission( 1443 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1444 "ConnectivityService"); 1445 } 1446 1447 private void enforceInternetPermission() { 1448 mContext.enforceCallingOrSelfPermission( 1449 android.Manifest.permission.INTERNET, 1450 "ConnectivityService"); 1451 } 1452 1453 private void enforceAccessPermission() { 1454 mContext.enforceCallingOrSelfPermission( 1455 android.Manifest.permission.ACCESS_NETWORK_STATE, 1456 "ConnectivityService"); 1457 } 1458 1459 private void enforceChangePermission() { 1460 ConnectivityManager.enforceChangePermission(mContext); 1461 } 1462 1463 private void enforceTetherAccessPermission() { 1464 mContext.enforceCallingOrSelfPermission( 1465 android.Manifest.permission.ACCESS_NETWORK_STATE, 1466 "ConnectivityService"); 1467 } 1468 1469 private void enforceConnectivityInternalPermission() { 1470 mContext.enforceCallingOrSelfPermission( 1471 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1472 "ConnectivityService"); 1473 } 1474 1475 private void enforceKeepalivePermission() { 1476 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1477 } 1478 1479 public void sendConnectedBroadcast(NetworkInfo info) { 1480 enforceConnectivityInternalPermission(); 1481 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1482 } 1483 1484 private void sendInetConditionBroadcast(NetworkInfo info) { 1485 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1486 } 1487 1488 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1489 if (mLockdownTracker != null) { 1490 info = mLockdownTracker.augmentNetworkInfo(info); 1491 } 1492 1493 Intent intent = new Intent(bcastType); 1494 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1495 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1496 if (info.isFailover()) { 1497 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1498 info.setFailover(false); 1499 } 1500 if (info.getReason() != null) { 1501 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1502 } 1503 if (info.getExtraInfo() != null) { 1504 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1505 info.getExtraInfo()); 1506 } 1507 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1508 return intent; 1509 } 1510 1511 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1512 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1513 } 1514 1515 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1516 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1517 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1518 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1519 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1520 final long ident = Binder.clearCallingIdentity(); 1521 try { 1522 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1523 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1524 } finally { 1525 Binder.restoreCallingIdentity(ident); 1526 } 1527 } 1528 1529 private void sendStickyBroadcast(Intent intent) { 1530 synchronized(this) { 1531 if (!mSystemReady) { 1532 mInitialBroadcast = new Intent(intent); 1533 } 1534 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1535 if (DBG) { 1536 log("sendStickyBroadcast: action=" + intent.getAction()); 1537 } 1538 1539 Bundle options = null; 1540 final long ident = Binder.clearCallingIdentity(); 1541 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1542 final NetworkInfo ni = intent.getParcelableExtra( 1543 ConnectivityManager.EXTRA_NETWORK_INFO); 1544 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1545 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1546 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1547 } else { 1548 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1549 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1550 options = opts.toBundle(); 1551 } 1552 final IBatteryStats bs = BatteryStatsService.getService(); 1553 try { 1554 bs.noteConnectivityChanged(intent.getIntExtra( 1555 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1556 ni != null ? ni.getState().toString() : "?"); 1557 } catch (RemoteException e) { 1558 } 1559 } 1560 try { 1561 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1562 } finally { 1563 Binder.restoreCallingIdentity(ident); 1564 } 1565 } 1566 } 1567 1568 void systemReady() { 1569 loadGlobalProxy(); 1570 1571 synchronized(this) { 1572 mSystemReady = true; 1573 if (mInitialBroadcast != null) { 1574 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1575 mInitialBroadcast = null; 1576 } 1577 } 1578 // load the global proxy at startup 1579 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1580 1581 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1582 // for user to unlock device too. 1583 updateLockdownVpn(); 1584 1585 // Configure whether mobile data is always on. 1586 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1587 1588 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1589 1590 mPermissionMonitor.startMonitoring(); 1591 } 1592 1593 /** 1594 * Setup data activity tracking for the given network. 1595 * 1596 * Every {@code setupDataActivityTracking} should be paired with a 1597 * {@link #removeDataActivityTracking} for cleanup. 1598 */ 1599 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1600 final String iface = networkAgent.linkProperties.getInterfaceName(); 1601 1602 final int timeout; 1603 int type = ConnectivityManager.TYPE_NONE; 1604 1605 if (networkAgent.networkCapabilities.hasTransport( 1606 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1607 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1608 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1609 10); 1610 type = ConnectivityManager.TYPE_MOBILE; 1611 } else if (networkAgent.networkCapabilities.hasTransport( 1612 NetworkCapabilities.TRANSPORT_WIFI)) { 1613 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1614 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1615 15); 1616 type = ConnectivityManager.TYPE_WIFI; 1617 } else { 1618 // do not track any other networks 1619 timeout = 0; 1620 } 1621 1622 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1623 try { 1624 mNetd.addIdleTimer(iface, timeout, type); 1625 } catch (Exception e) { 1626 // You shall not crash! 1627 loge("Exception in setupDataActivityTracking " + e); 1628 } 1629 } 1630 } 1631 1632 /** 1633 * Remove data activity tracking when network disconnects. 1634 */ 1635 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1636 final String iface = networkAgent.linkProperties.getInterfaceName(); 1637 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1638 1639 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1640 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1641 try { 1642 // the call fails silently if no idletimer setup for this interface 1643 mNetd.removeIdleTimer(iface); 1644 } catch (Exception e) { 1645 loge("Exception in removeDataActivityTracking " + e); 1646 } 1647 } 1648 } 1649 1650 /** 1651 * Reads the network specific MTU size from reources. 1652 * and set it on it's iface. 1653 */ 1654 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1655 final String iface = newLp.getInterfaceName(); 1656 final int mtu = newLp.getMtu(); 1657 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1658 if (VDBG) log("identical MTU - not setting"); 1659 return; 1660 } 1661 1662 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1663 loge("Unexpected mtu value: " + mtu + ", " + iface); 1664 return; 1665 } 1666 1667 // Cannot set MTU without interface name 1668 if (TextUtils.isEmpty(iface)) { 1669 loge("Setting MTU size with null iface."); 1670 return; 1671 } 1672 1673 try { 1674 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1675 mNetd.setMtu(iface, mtu); 1676 } catch (Exception e) { 1677 Slog.e(TAG, "exception in setMtu()" + e); 1678 } 1679 } 1680 1681 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1682 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1683 1684 // Overridden for testing purposes to avoid writing to SystemProperties. 1685 @VisibleForTesting 1686 protected int getDefaultTcpRwnd() { 1687 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1688 } 1689 1690 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1691 if (isDefaultNetwork(nai) == false) { 1692 return; 1693 } 1694 1695 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1696 String[] values = null; 1697 if (tcpBufferSizes != null) { 1698 values = tcpBufferSizes.split(","); 1699 } 1700 1701 if (values == null || values.length != 6) { 1702 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1703 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1704 values = tcpBufferSizes.split(","); 1705 } 1706 1707 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1708 1709 try { 1710 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1711 1712 final String prefix = "/sys/kernel/ipv4/tcp_"; 1713 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1714 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1715 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1716 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1717 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1718 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1719 mCurrentTcpBufferSizes = tcpBufferSizes; 1720 } catch (IOException e) { 1721 loge("Can't set TCP buffer sizes:" + e); 1722 } 1723 1724 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1725 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1726 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1727 if (rwndValue != 0) { 1728 SystemProperties.set(sysctlKey, rwndValue.toString()); 1729 } 1730 } 1731 1732 private void flushVmDnsCache() { 1733 /* 1734 * Tell the VMs to toss their DNS caches 1735 */ 1736 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1737 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1738 /* 1739 * Connectivity events can happen before boot has completed ... 1740 */ 1741 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1742 final long ident = Binder.clearCallingIdentity(); 1743 try { 1744 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1745 } finally { 1746 Binder.restoreCallingIdentity(ident); 1747 } 1748 } 1749 1750 @Override 1751 public int getRestoreDefaultNetworkDelay(int networkType) { 1752 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1753 NETWORK_RESTORE_DELAY_PROP_NAME); 1754 if(restoreDefaultNetworkDelayStr != null && 1755 restoreDefaultNetworkDelayStr.length() != 0) { 1756 try { 1757 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1758 } catch (NumberFormatException e) { 1759 } 1760 } 1761 // if the system property isn't set, use the value for the apn type 1762 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1763 1764 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1765 (mNetConfigs[networkType] != null)) { 1766 ret = mNetConfigs[networkType].restoreTime; 1767 } 1768 return ret; 1769 } 1770 1771 private boolean argsContain(String[] args, String target) { 1772 for (String arg : args) { 1773 if (arg.equals(target)) return true; 1774 } 1775 return false; 1776 } 1777 1778 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1779 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1780 final long DIAG_TIME_MS = 5000; 1781 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1782 // Start gathering diagnostic information. 1783 netDiags.add(new NetworkDiagnostics( 1784 nai.network, 1785 new LinkProperties(nai.linkProperties), // Must be a copy. 1786 DIAG_TIME_MS)); 1787 } 1788 1789 for (NetworkDiagnostics netDiag : netDiags) { 1790 pw.println(); 1791 netDiag.waitForMeasurements(); 1792 netDiag.dump(pw); 1793 } 1794 } 1795 1796 @Override 1797 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1798 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1799 if (mContext.checkCallingOrSelfPermission( 1800 android.Manifest.permission.DUMP) 1801 != PackageManager.PERMISSION_GRANTED) { 1802 pw.println("Permission Denial: can't dump ConnectivityService " + 1803 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1804 Binder.getCallingUid()); 1805 return; 1806 } 1807 1808 if (argsContain(args, "--diag")) { 1809 dumpNetworkDiagnostics(pw); 1810 return; 1811 } 1812 1813 pw.print("NetworkFactories for:"); 1814 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1815 pw.print(" " + nfi.name); 1816 } 1817 pw.println(); 1818 pw.println(); 1819 1820 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1821 pw.print("Active default network: "); 1822 if (defaultNai == null) { 1823 pw.println("none"); 1824 } else { 1825 pw.println(defaultNai.network.netId); 1826 } 1827 pw.println(); 1828 1829 pw.println("Current Networks:"); 1830 pw.increaseIndent(); 1831 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1832 pw.println(nai.toString()); 1833 pw.increaseIndent(); 1834 pw.println("Requests:"); 1835 pw.increaseIndent(); 1836 for (int i = 0; i < nai.networkRequests.size(); i++) { 1837 pw.println(nai.networkRequests.valueAt(i).toString()); 1838 } 1839 pw.decreaseIndent(); 1840 pw.println("Lingered:"); 1841 pw.increaseIndent(); 1842 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1843 pw.decreaseIndent(); 1844 pw.decreaseIndent(); 1845 } 1846 pw.decreaseIndent(); 1847 pw.println(); 1848 1849 pw.println("Network Requests:"); 1850 pw.increaseIndent(); 1851 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1852 pw.println(nri.toString()); 1853 } 1854 pw.println(); 1855 pw.decreaseIndent(); 1856 1857 mLegacyTypeTracker.dump(pw); 1858 1859 synchronized (this) { 1860 pw.print("mNetTransitionWakeLock: currently " + 1861 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1862 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1863 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1864 } else { 1865 pw.println(", last requested never"); 1866 } 1867 } 1868 1869 pw.println(); 1870 mTethering.dump(fd, pw, args); 1871 1872 pw.println(); 1873 mKeepaliveTracker.dump(pw); 1874 1875 pw.println(); 1876 1877 if (mInetLog != null && mInetLog.size() > 0) { 1878 pw.println(); 1879 pw.println("Inet condition reports:"); 1880 pw.increaseIndent(); 1881 for(int i = 0; i < mInetLog.size(); i++) { 1882 pw.println(mInetLog.get(i)); 1883 } 1884 pw.decreaseIndent(); 1885 } 1886 1887 if (argsContain(args, "--short") == false) { 1888 pw.println(); 1889 synchronized (mValidationLogs) { 1890 pw.println("mValidationLogs (most recent first):"); 1891 for (Pair<Network,ReadOnlyLocalLog> p : mValidationLogs) { 1892 pw.println(p.first); 1893 pw.increaseIndent(); 1894 p.second.dump(fd, pw, args); 1895 pw.decreaseIndent(); 1896 } 1897 } 1898 1899 pw.println(); 1900 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1901 pw.increaseIndent(); 1902 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1903 pw.decreaseIndent(); 1904 } 1905 } 1906 1907 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 1908 if (nai.network == null) return false; 1909 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1910 if (officialNai != null && officialNai.equals(nai)) return true; 1911 if (officialNai != null || VDBG) { 1912 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 1913 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1914 " - " + nai); 1915 } 1916 return false; 1917 } 1918 1919 private boolean isRequest(NetworkRequest request) { 1920 return mNetworkRequests.get(request).isRequest(); 1921 } 1922 1923 // must be stateless - things change under us. 1924 private class NetworkStateTrackerHandler extends Handler { 1925 public NetworkStateTrackerHandler(Looper looper) { 1926 super(looper); 1927 } 1928 1929 private boolean maybeHandleAsyncChannelMessage(Message msg) { 1930 switch (msg.what) { 1931 default: 1932 return false; 1933 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1934 handleAsyncChannelHalfConnect(msg); 1935 break; 1936 } 1937 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1938 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1939 if (nai != null) nai.asyncChannel.disconnect(); 1940 break; 1941 } 1942 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1943 handleAsyncChannelDisconnected(msg); 1944 break; 1945 } 1946 } 1947 return true; 1948 } 1949 1950 private void maybeHandleNetworkAgentMessage(Message msg) { 1951 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1952 if (nai == null) { 1953 if (VDBG) { 1954 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 1955 log(String.format("%s from unknown NetworkAgent", what)); 1956 } 1957 return; 1958 } 1959 1960 switch (msg.what) { 1961 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1962 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 1963 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 1964 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 1965 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 1966 } 1967 if (nai.created && !nai.networkCapabilities.equalImmutableCapabilities( 1968 networkCapabilities)) { 1969 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 1970 + nai.networkCapabilities + " -> " + networkCapabilities); 1971 } 1972 updateCapabilities(nai, networkCapabilities); 1973 break; 1974 } 1975 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1976 if (VDBG) { 1977 log("Update of LinkProperties for " + nai.name() + 1978 "; created=" + nai.created); 1979 } 1980 LinkProperties oldLp = nai.linkProperties; 1981 synchronized (nai) { 1982 nai.linkProperties = (LinkProperties)msg.obj; 1983 } 1984 if (nai.created) updateLinkProperties(nai, oldLp); 1985 break; 1986 } 1987 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1988 NetworkInfo info = (NetworkInfo) msg.obj; 1989 updateNetworkInfo(nai, info); 1990 break; 1991 } 1992 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1993 Integer score = (Integer) msg.obj; 1994 if (score != null) updateNetworkScore(nai, score.intValue()); 1995 break; 1996 } 1997 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 1998 try { 1999 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2000 } catch (Exception e) { 2001 // Never crash! 2002 loge("Exception in addVpnUidRanges: " + e); 2003 } 2004 break; 2005 } 2006 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2007 try { 2008 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2009 } catch (Exception e) { 2010 // Never crash! 2011 loge("Exception in removeVpnUidRanges: " + e); 2012 } 2013 break; 2014 } 2015 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2016 if (nai.created && !nai.networkMisc.explicitlySelected) { 2017 loge("ERROR: created network explicitly selected."); 2018 } 2019 nai.networkMisc.explicitlySelected = true; 2020 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2021 break; 2022 } 2023 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2024 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2025 break; 2026 } 2027 } 2028 } 2029 2030 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2031 switch (msg.what) { 2032 default: 2033 return false; 2034 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2035 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2036 if (isLiveNetworkAgent(nai, msg.what)) { 2037 final boolean valid = 2038 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2039 if (DBG) log(nai.name() + " validation " + (valid ? " passed" : "failed")); 2040 if (valid != nai.lastValidated) { 2041 final int oldScore = nai.getCurrentScore(); 2042 nai.lastValidated = valid; 2043 nai.everValidated |= valid; 2044 updateCapabilities(nai, nai.networkCapabilities); 2045 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2046 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2047 } 2048 updateInetCondition(nai); 2049 // Let the NetworkAgent know the state of its network 2050 nai.asyncChannel.sendMessage( 2051 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2052 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2053 0, null); 2054 } 2055 break; 2056 } 2057 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 2058 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2059 if (isLiveNetworkAgent(nai, msg.what)) { 2060 handleLingerComplete(nai); 2061 } 2062 break; 2063 } 2064 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2065 final int netId = msg.arg2; 2066 final boolean visible = (msg.arg1 != 0); 2067 final NetworkAgentInfo nai; 2068 synchronized (mNetworkForNetId) { 2069 nai = mNetworkForNetId.get(netId); 2070 } 2071 // If captive portal status has changed, update capabilities. 2072 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2073 nai.lastCaptivePortalDetected = visible; 2074 nai.everCaptivePortalDetected |= visible; 2075 updateCapabilities(nai, nai.networkCapabilities); 2076 } 2077 if (!visible) { 2078 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2079 } else { 2080 if (nai == null) { 2081 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2082 break; 2083 } 2084 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2085 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2086 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2087 } 2088 break; 2089 } 2090 } 2091 return true; 2092 } 2093 2094 @Override 2095 public void handleMessage(Message msg) { 2096 if (!maybeHandleAsyncChannelMessage(msg) && !maybeHandleNetworkMonitorMessage(msg)) { 2097 maybeHandleNetworkAgentMessage(msg); 2098 } 2099 } 2100 } 2101 2102 private void linger(NetworkAgentInfo nai) { 2103 nai.lingering = true; 2104 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 2105 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 2106 } 2107 2108 // Cancel any lingering so the linger timeout doesn't teardown a network. 2109 // This should be called when a network begins satisfying a NetworkRequest. 2110 // Note: depending on what state the NetworkMonitor is in (e.g., 2111 // if it's awaiting captive portal login, or if validation failed), this 2112 // may trigger a re-evaluation of the network. 2113 private void unlinger(NetworkAgentInfo nai) { 2114 nai.networkLingered.clear(); 2115 if (!nai.lingering) return; 2116 nai.lingering = false; 2117 if (VDBG) log("Canceling linger of " + nai.name()); 2118 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2119 } 2120 2121 private void handleAsyncChannelHalfConnect(Message msg) { 2122 AsyncChannel ac = (AsyncChannel) msg.obj; 2123 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2124 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2125 if (VDBG) log("NetworkFactory connected"); 2126 // A network factory has connected. Send it all current NetworkRequests. 2127 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2128 if (!nri.isRequest()) continue; 2129 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2130 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2131 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2132 } 2133 } else { 2134 loge("Error connecting NetworkFactory"); 2135 mNetworkFactoryInfos.remove(msg.obj); 2136 } 2137 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2138 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2139 if (VDBG) log("NetworkAgent connected"); 2140 // A network agent has requested a connection. Establish the connection. 2141 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2142 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2143 } else { 2144 loge("Error connecting NetworkAgent"); 2145 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2146 if (nai != null) { 2147 final boolean wasDefault = isDefaultNetwork(nai); 2148 synchronized (mNetworkForNetId) { 2149 mNetworkForNetId.remove(nai.network.netId); 2150 mNetIdInUse.delete(nai.network.netId); 2151 } 2152 // Just in case. 2153 mLegacyTypeTracker.remove(nai, wasDefault); 2154 } 2155 } 2156 } 2157 } 2158 2159 private void handleAsyncChannelDisconnected(Message msg) { 2160 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2161 if (nai != null) { 2162 if (DBG) { 2163 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2164 } 2165 // A network agent has disconnected. 2166 // TODO - if we move the logic to the network agent (have them disconnect 2167 // because they lost all their requests or because their score isn't good) 2168 // then they would disconnect organically, report their new state and then 2169 // disconnect the channel. 2170 if (nai.networkInfo.isConnected()) { 2171 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2172 null, null); 2173 } 2174 final boolean wasDefault = isDefaultNetwork(nai); 2175 if (wasDefault) { 2176 mDefaultInetConditionPublished = 0; 2177 } 2178 notifyIfacesChangedForNetworkStats(); 2179 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2180 // by other networks that are already connected. Perhaps that can be done by 2181 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2182 // of rematchAllNetworksAndRequests 2183 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2184 mKeepaliveTracker.handleStopAllKeepalives(nai, 2185 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2186 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2187 mNetworkAgentInfos.remove(msg.replyTo); 2188 updateClat(null, nai.linkProperties, nai); 2189 synchronized (mNetworkForNetId) { 2190 // Remove the NetworkAgent, but don't mark the netId as 2191 // available until we've told netd to delete it below. 2192 mNetworkForNetId.remove(nai.network.netId); 2193 } 2194 // Remove all previously satisfied requests. 2195 for (int i = 0; i < nai.networkRequests.size(); i++) { 2196 NetworkRequest request = nai.networkRequests.valueAt(i); 2197 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2198 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2199 mNetworkForRequestId.remove(request.requestId); 2200 sendUpdatedScoreToFactories(request, 0); 2201 } 2202 } 2203 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2204 removeDataActivityTracking(nai); 2205 notifyLockdownVpn(nai); 2206 requestNetworkTransitionWakelock(nai.name()); 2207 } 2208 mLegacyTypeTracker.remove(nai, wasDefault); 2209 rematchAllNetworksAndRequests(null, 0); 2210 if (nai.created) { 2211 // Tell netd to clean up the configuration for this network 2212 // (routing rules, DNS, etc). 2213 // This may be slow as it requires a lot of netd shelling out to ip and 2214 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2215 // after we've rematched networks with requests which should make a potential 2216 // fallback network the default or requested a new network from the 2217 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2218 // long time. 2219 try { 2220 mNetd.removeNetwork(nai.network.netId); 2221 } catch (Exception e) { 2222 loge("Exception removing network: " + e); 2223 } 2224 } 2225 synchronized (mNetworkForNetId) { 2226 mNetIdInUse.delete(nai.network.netId); 2227 } 2228 } else { 2229 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2230 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2231 } 2232 } 2233 2234 // If this method proves to be too slow then we can maintain a separate 2235 // pendingIntent => NetworkRequestInfo map. 2236 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2237 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2238 Intent intent = pendingIntent.getIntent(); 2239 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2240 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2241 if (existingPendingIntent != null && 2242 existingPendingIntent.getIntent().filterEquals(intent)) { 2243 return entry.getValue(); 2244 } 2245 } 2246 return null; 2247 } 2248 2249 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2250 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2251 2252 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2253 if (existingRequest != null) { // remove the existing request. 2254 if (DBG) log("Replacing " + existingRequest.request + " with " 2255 + nri.request + " because their intents matched."); 2256 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2257 } 2258 handleRegisterNetworkRequest(nri); 2259 } 2260 2261 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2262 mNetworkRequests.put(nri.request, nri); 2263 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2264 if (!nri.isRequest()) { 2265 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2266 if (nri.request.networkCapabilities.hasSignalStrength() && 2267 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2268 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2269 } 2270 } 2271 } 2272 rematchAllNetworksAndRequests(null, 0); 2273 if (nri.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2274 sendUpdatedScoreToFactories(nri.request, 0); 2275 } 2276 } 2277 2278 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2279 int callingUid) { 2280 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2281 if (nri != null) { 2282 handleReleaseNetworkRequest(nri.request, callingUid); 2283 } 2284 } 2285 2286 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2287 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2288 // would it have a chance of satisfying any NetworkRequests. 2289 private boolean unneeded(NetworkAgentInfo nai) { 2290 if (!nai.created || nai.isVPN() || nai.lingering) return false; 2291 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2292 // If this Network is already the highest scoring Network for a request, or if 2293 // there is hope for it to become one if it validated, then it is needed. 2294 if (nri.isRequest() && nai.satisfies(nri.request) && 2295 (nai.networkRequests.get(nri.request.requestId) != null || 2296 // Note that this catches two important cases: 2297 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2298 // is currently satisfying the request. This is desirable when 2299 // cellular ends up validating but WiFi does not. 2300 // 2. Unvalidated WiFi will not be reaped when validated cellular 2301 // is currently satisfying the request. This is desirable when 2302 // WiFi ends up validating and out scoring cellular. 2303 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2304 nai.getCurrentScoreAsValidated())) { 2305 return false; 2306 } 2307 } 2308 return true; 2309 } 2310 2311 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2312 NetworkRequestInfo nri = mNetworkRequests.get(request); 2313 if (nri != null) { 2314 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2315 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2316 return; 2317 } 2318 if (DBG) log("releasing NetworkRequest " + request); 2319 nri.unlinkDeathRecipient(); 2320 mNetworkRequests.remove(request); 2321 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2322 if (nri.isRequest()) { 2323 // Find all networks that are satisfying this request and remove the request 2324 // from their request lists. 2325 // TODO - it's my understanding that for a request there is only a single 2326 // network satisfying it, so this loop is wasteful 2327 boolean wasKept = false; 2328 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2329 if (nai.networkRequests.get(nri.request.requestId) != null) { 2330 nai.networkRequests.remove(nri.request.requestId); 2331 if (DBG) { 2332 log(" Removing from current network " + nai.name() + 2333 ", leaving " + nai.networkRequests.size() + 2334 " requests."); 2335 } 2336 if (unneeded(nai)) { 2337 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2338 teardownUnneededNetwork(nai); 2339 } else { 2340 // suspect there should only be one pass through here 2341 // but if any were kept do the check below 2342 wasKept |= true; 2343 } 2344 } 2345 } 2346 2347 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2348 if (nai != null) { 2349 mNetworkForRequestId.remove(nri.request.requestId); 2350 } 2351 // Maintain the illusion. When this request arrived, we might have pretended 2352 // that a network connected to serve it, even though the network was already 2353 // connected. Now that this request has gone away, we might have to pretend 2354 // that the network disconnected. LegacyTypeTracker will generate that 2355 // phantom disconnect for this type. 2356 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2357 boolean doRemove = true; 2358 if (wasKept) { 2359 // check if any of the remaining requests for this network are for the 2360 // same legacy type - if so, don't remove the nai 2361 for (int i = 0; i < nai.networkRequests.size(); i++) { 2362 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2363 if (otherRequest.legacyType == nri.request.legacyType && 2364 isRequest(otherRequest)) { 2365 if (DBG) log(" still have other legacy request - leaving"); 2366 doRemove = false; 2367 } 2368 } 2369 } 2370 2371 if (doRemove) { 2372 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2373 } 2374 } 2375 2376 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2377 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2378 nri.request); 2379 } 2380 } else { 2381 // listens don't have a singular affectedNetwork. Check all networks to see 2382 // if this listen request applies and remove it. 2383 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2384 nai.networkRequests.remove(nri.request.requestId); 2385 if (nri.request.networkCapabilities.hasSignalStrength() && 2386 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2387 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2388 } 2389 } 2390 } 2391 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2392 } 2393 } 2394 2395 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2396 enforceConnectivityInternalPermission(); 2397 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2398 accept ? 1 : 0, always ? 1: 0, network)); 2399 } 2400 2401 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2402 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2403 " accept=" + accept + " always=" + always); 2404 2405 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2406 if (nai == null) { 2407 // Nothing to do. 2408 return; 2409 } 2410 2411 if (nai.everValidated) { 2412 // The network validated while the dialog box was up. Take no action. 2413 return; 2414 } 2415 2416 if (!nai.networkMisc.explicitlySelected) { 2417 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2418 } 2419 2420 if (accept != nai.networkMisc.acceptUnvalidated) { 2421 int oldScore = nai.getCurrentScore(); 2422 nai.networkMisc.acceptUnvalidated = accept; 2423 rematchAllNetworksAndRequests(nai, oldScore); 2424 sendUpdatedScoreToFactories(nai); 2425 } 2426 2427 if (always) { 2428 nai.asyncChannel.sendMessage( 2429 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2430 } 2431 2432 if (!accept) { 2433 // Tell the NetworkAgent to not automatically reconnect to the network. 2434 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2435 // Teardown the nework. 2436 teardownUnneededNetwork(nai); 2437 } 2438 2439 } 2440 2441 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2442 if (DBG) log("scheduleUnvalidatedPrompt " + nai.network); 2443 mHandler.sendMessageDelayed( 2444 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2445 PROMPT_UNVALIDATED_DELAY_MS); 2446 } 2447 2448 private void handlePromptUnvalidated(Network network) { 2449 if (DBG) log("handlePromptUnvalidated " + network); 2450 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2451 2452 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2453 // we haven't already been told to switch to it regardless of whether it validated or not. 2454 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2455 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2456 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2457 return; 2458 } 2459 2460 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2461 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2462 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2463 intent.setClassName("com.android.settings", 2464 "com.android.settings.wifi.WifiNoInternetDialog"); 2465 2466 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2467 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2468 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2469 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2470 } 2471 2472 private class InternalHandler extends Handler { 2473 public InternalHandler(Looper looper) { 2474 super(looper); 2475 } 2476 2477 @Override 2478 public void handleMessage(Message msg) { 2479 switch (msg.what) { 2480 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2481 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2482 String causedBy = null; 2483 synchronized (ConnectivityService.this) { 2484 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2485 mNetTransitionWakeLock.isHeld()) { 2486 mNetTransitionWakeLock.release(); 2487 causedBy = mNetTransitionWakeLockCausedBy; 2488 } else { 2489 break; 2490 } 2491 } 2492 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2493 log("Failed to find a new network - expiring NetTransition Wakelock"); 2494 } else { 2495 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2496 " cleared because we found a replacement network"); 2497 } 2498 break; 2499 } 2500 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2501 handleDeprecatedGlobalHttpProxy(); 2502 break; 2503 } 2504 case EVENT_PROXY_HAS_CHANGED: { 2505 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2506 break; 2507 } 2508 case EVENT_REGISTER_NETWORK_FACTORY: { 2509 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2510 break; 2511 } 2512 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2513 handleUnregisterNetworkFactory((Messenger)msg.obj); 2514 break; 2515 } 2516 case EVENT_REGISTER_NETWORK_AGENT: { 2517 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2518 break; 2519 } 2520 case EVENT_REGISTER_NETWORK_REQUEST: 2521 case EVENT_REGISTER_NETWORK_LISTENER: { 2522 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2523 break; 2524 } 2525 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2526 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2527 handleRegisterNetworkRequestWithIntent(msg); 2528 break; 2529 } 2530 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2531 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2532 break; 2533 } 2534 case EVENT_RELEASE_NETWORK_REQUEST: { 2535 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2536 break; 2537 } 2538 case EVENT_SET_ACCEPT_UNVALIDATED: { 2539 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2540 break; 2541 } 2542 case EVENT_PROMPT_UNVALIDATED: { 2543 handlePromptUnvalidated((Network) msg.obj); 2544 break; 2545 } 2546 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2547 handleMobileDataAlwaysOn(); 2548 break; 2549 } 2550 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2551 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2552 mKeepaliveTracker.handleStartKeepalive(msg); 2553 break; 2554 } 2555 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2556 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2557 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2558 int slot = msg.arg1; 2559 int reason = msg.arg2; 2560 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2561 break; 2562 } 2563 case EVENT_SYSTEM_READY: { 2564 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2565 nai.networkMonitor.systemReady = true; 2566 } 2567 break; 2568 } 2569 } 2570 } 2571 } 2572 2573 // javadoc from interface 2574 public int tether(String iface) { 2575 ConnectivityManager.enforceTetherChangePermission(mContext); 2576 if (isTetheringSupported()) { 2577 return mTethering.tether(iface); 2578 } else { 2579 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2580 } 2581 } 2582 2583 // javadoc from interface 2584 public int untether(String iface) { 2585 ConnectivityManager.enforceTetherChangePermission(mContext); 2586 2587 if (isTetheringSupported()) { 2588 return mTethering.untether(iface); 2589 } else { 2590 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2591 } 2592 } 2593 2594 // javadoc from interface 2595 public int getLastTetherError(String iface) { 2596 enforceTetherAccessPermission(); 2597 2598 if (isTetheringSupported()) { 2599 return mTethering.getLastTetherError(iface); 2600 } else { 2601 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2602 } 2603 } 2604 2605 // TODO - proper iface API for selection by property, inspection, etc 2606 public String[] getTetherableUsbRegexs() { 2607 enforceTetherAccessPermission(); 2608 if (isTetheringSupported()) { 2609 return mTethering.getTetherableUsbRegexs(); 2610 } else { 2611 return new String[0]; 2612 } 2613 } 2614 2615 public String[] getTetherableWifiRegexs() { 2616 enforceTetherAccessPermission(); 2617 if (isTetheringSupported()) { 2618 return mTethering.getTetherableWifiRegexs(); 2619 } else { 2620 return new String[0]; 2621 } 2622 } 2623 2624 public String[] getTetherableBluetoothRegexs() { 2625 enforceTetherAccessPermission(); 2626 if (isTetheringSupported()) { 2627 return mTethering.getTetherableBluetoothRegexs(); 2628 } else { 2629 return new String[0]; 2630 } 2631 } 2632 2633 public int setUsbTethering(boolean enable) { 2634 ConnectivityManager.enforceTetherChangePermission(mContext); 2635 if (isTetheringSupported()) { 2636 return mTethering.setUsbTethering(enable); 2637 } else { 2638 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2639 } 2640 } 2641 2642 // TODO - move iface listing, queries, etc to new module 2643 // javadoc from interface 2644 public String[] getTetherableIfaces() { 2645 enforceTetherAccessPermission(); 2646 return mTethering.getTetherableIfaces(); 2647 } 2648 2649 public String[] getTetheredIfaces() { 2650 enforceTetherAccessPermission(); 2651 return mTethering.getTetheredIfaces(); 2652 } 2653 2654 public String[] getTetheringErroredIfaces() { 2655 enforceTetherAccessPermission(); 2656 return mTethering.getErroredIfaces(); 2657 } 2658 2659 public String[] getTetheredDhcpRanges() { 2660 enforceConnectivityInternalPermission(); 2661 return mTethering.getTetheredDhcpRanges(); 2662 } 2663 2664 // if ro.tether.denied = true we default to no tethering 2665 // gservices could set the secure setting to 1 though to enable it on a build where it 2666 // had previously been turned off. 2667 @Override 2668 public boolean isTetheringSupported() { 2669 enforceTetherAccessPermission(); 2670 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2671 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2672 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2673 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2674 return tetherEnabledInSettings && mUserManager.isAdminUser() && 2675 ((mTethering.getTetherableUsbRegexs().length != 0 || 2676 mTethering.getTetherableWifiRegexs().length != 0 || 2677 mTethering.getTetherableBluetoothRegexs().length != 0) && 2678 mTethering.getUpstreamIfaceTypes().length != 0); 2679 } 2680 2681 @Override 2682 public void startTethering(int type, ResultReceiver receiver, 2683 boolean showProvisioningUi) { 2684 ConnectivityManager.enforceTetherChangePermission(mContext); 2685 if (!isTetheringSupported()) { 2686 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 2687 return; 2688 } 2689 mTethering.startTethering(type, receiver, showProvisioningUi); 2690 } 2691 2692 @Override 2693 public void stopTethering(int type) { 2694 ConnectivityManager.enforceTetherChangePermission(mContext); 2695 mTethering.stopTethering(type); 2696 } 2697 2698 // Called when we lose the default network and have no replacement yet. 2699 // This will automatically be cleared after X seconds or a new default network 2700 // becomes CONNECTED, whichever happens first. The timer is started by the 2701 // first caller and not restarted by subsequent callers. 2702 private void requestNetworkTransitionWakelock(String forWhom) { 2703 int serialNum = 0; 2704 synchronized (this) { 2705 if (mNetTransitionWakeLock.isHeld()) return; 2706 serialNum = ++mNetTransitionWakeLockSerialNumber; 2707 mNetTransitionWakeLock.acquire(); 2708 mNetTransitionWakeLockCausedBy = forWhom; 2709 } 2710 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2711 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2712 mNetTransitionWakeLockTimeout); 2713 return; 2714 } 2715 2716 // 100 percent is full good, 0 is full bad. 2717 public void reportInetCondition(int networkType, int percentage) { 2718 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2719 if (nai == null) return; 2720 reportNetworkConnectivity(nai.network, percentage > 50); 2721 } 2722 2723 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2724 enforceAccessPermission(); 2725 enforceInternetPermission(); 2726 2727 NetworkAgentInfo nai; 2728 if (network == null) { 2729 nai = getDefaultNetwork(); 2730 } else { 2731 nai = getNetworkAgentInfoForNetwork(network); 2732 } 2733 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2734 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2735 return; 2736 } 2737 // Revalidate if the app report does not match our current validated state. 2738 if (hasConnectivity == nai.lastValidated) return; 2739 final int uid = Binder.getCallingUid(); 2740 if (DBG) { 2741 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2742 ") by " + uid); 2743 } 2744 synchronized (nai) { 2745 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2746 // which isn't meant to work on uncreated networks. 2747 if (!nai.created) return; 2748 2749 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2750 2751 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2752 } 2753 } 2754 2755 private ProxyInfo getDefaultProxy() { 2756 // this information is already available as a world read/writable jvm property 2757 // so this API change wouldn't have a benifit. It also breaks the passing 2758 // of proxy info to all the JVMs. 2759 // enforceAccessPermission(); 2760 synchronized (mProxyLock) { 2761 ProxyInfo ret = mGlobalProxy; 2762 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2763 return ret; 2764 } 2765 } 2766 2767 public ProxyInfo getProxyForNetwork(Network network) { 2768 if (network == null) return getDefaultProxy(); 2769 final ProxyInfo globalProxy = getGlobalProxy(); 2770 if (globalProxy != null) return globalProxy; 2771 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 2772 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 2773 // caller may not have. 2774 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2775 if (nai == null) return null; 2776 synchronized (nai) { 2777 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 2778 if (proxyInfo == null) return null; 2779 return new ProxyInfo(proxyInfo); 2780 } 2781 } 2782 2783 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2784 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2785 // proxy is null then there is no proxy in place). 2786 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2787 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2788 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2789 proxy = null; 2790 } 2791 return proxy; 2792 } 2793 2794 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2795 // better for determining if a new proxy broadcast is necessary: 2796 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2797 // avoid unnecessary broadcasts. 2798 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2799 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2800 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2801 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2802 // all set. 2803 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2804 a = canonicalizeProxyInfo(a); 2805 b = canonicalizeProxyInfo(b); 2806 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2807 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2808 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2809 } 2810 2811 public void setGlobalProxy(ProxyInfo proxyProperties) { 2812 enforceConnectivityInternalPermission(); 2813 2814 synchronized (mProxyLock) { 2815 if (proxyProperties == mGlobalProxy) return; 2816 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2817 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2818 2819 String host = ""; 2820 int port = 0; 2821 String exclList = ""; 2822 String pacFileUrl = ""; 2823 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2824 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2825 if (!proxyProperties.isValid()) { 2826 if (DBG) 2827 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2828 return; 2829 } 2830 mGlobalProxy = new ProxyInfo(proxyProperties); 2831 host = mGlobalProxy.getHost(); 2832 port = mGlobalProxy.getPort(); 2833 exclList = mGlobalProxy.getExclusionListAsString(); 2834 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2835 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2836 } 2837 } else { 2838 mGlobalProxy = null; 2839 } 2840 ContentResolver res = mContext.getContentResolver(); 2841 final long token = Binder.clearCallingIdentity(); 2842 try { 2843 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2844 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2845 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2846 exclList); 2847 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2848 } finally { 2849 Binder.restoreCallingIdentity(token); 2850 } 2851 2852 if (mGlobalProxy == null) { 2853 proxyProperties = mDefaultProxy; 2854 } 2855 sendProxyBroadcast(proxyProperties); 2856 } 2857 } 2858 2859 private void loadGlobalProxy() { 2860 ContentResolver res = mContext.getContentResolver(); 2861 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2862 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2863 String exclList = Settings.Global.getString(res, 2864 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2865 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2866 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2867 ProxyInfo proxyProperties; 2868 if (!TextUtils.isEmpty(pacFileUrl)) { 2869 proxyProperties = new ProxyInfo(pacFileUrl); 2870 } else { 2871 proxyProperties = new ProxyInfo(host, port, exclList); 2872 } 2873 if (!proxyProperties.isValid()) { 2874 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2875 return; 2876 } 2877 2878 synchronized (mProxyLock) { 2879 mGlobalProxy = proxyProperties; 2880 } 2881 } 2882 } 2883 2884 public ProxyInfo getGlobalProxy() { 2885 // this information is already available as a world read/writable jvm property 2886 // so this API change wouldn't have a benifit. It also breaks the passing 2887 // of proxy info to all the JVMs. 2888 // enforceAccessPermission(); 2889 synchronized (mProxyLock) { 2890 return mGlobalProxy; 2891 } 2892 } 2893 2894 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2895 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2896 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2897 proxy = null; 2898 } 2899 synchronized (mProxyLock) { 2900 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2901 if (mDefaultProxy == proxy) return; // catches repeated nulls 2902 if (proxy != null && !proxy.isValid()) { 2903 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2904 return; 2905 } 2906 2907 // This call could be coming from the PacManager, containing the port of the local 2908 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2909 // global (to get the correct local port), and send a broadcast. 2910 // TODO: Switch PacManager to have its own message to send back rather than 2911 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2912 if ((mGlobalProxy != null) && (proxy != null) 2913 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2914 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2915 mGlobalProxy = proxy; 2916 sendProxyBroadcast(mGlobalProxy); 2917 return; 2918 } 2919 mDefaultProxy = proxy; 2920 2921 if (mGlobalProxy != null) return; 2922 if (!mDefaultProxyDisabled) { 2923 sendProxyBroadcast(proxy); 2924 } 2925 } 2926 } 2927 2928 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2929 // This method gets called when any network changes proxy, but the broadcast only ever contains 2930 // the default proxy (even if it hasn't changed). 2931 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2932 // world where an app might be bound to a non-default network. 2933 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2934 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2935 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2936 2937 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2938 sendProxyBroadcast(getDefaultProxy()); 2939 } 2940 } 2941 2942 private void handleDeprecatedGlobalHttpProxy() { 2943 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2944 Settings.Global.HTTP_PROXY); 2945 if (!TextUtils.isEmpty(proxy)) { 2946 String data[] = proxy.split(":"); 2947 if (data.length == 0) { 2948 return; 2949 } 2950 2951 String proxyHost = data[0]; 2952 int proxyPort = 8080; 2953 if (data.length > 1) { 2954 try { 2955 proxyPort = Integer.parseInt(data[1]); 2956 } catch (NumberFormatException e) { 2957 return; 2958 } 2959 } 2960 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2961 setGlobalProxy(p); 2962 } 2963 } 2964 2965 private void sendProxyBroadcast(ProxyInfo proxy) { 2966 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2967 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2968 if (DBG) log("sending Proxy Broadcast for " + proxy); 2969 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2970 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2971 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2972 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2973 final long ident = Binder.clearCallingIdentity(); 2974 try { 2975 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2976 } finally { 2977 Binder.restoreCallingIdentity(ident); 2978 } 2979 } 2980 2981 private static class SettingsObserver extends ContentObserver { 2982 final private HashMap<Uri, Integer> mUriEventMap; 2983 final private Context mContext; 2984 final private Handler mHandler; 2985 2986 SettingsObserver(Context context, Handler handler) { 2987 super(null); 2988 mUriEventMap = new HashMap<Uri, Integer>(); 2989 mContext = context; 2990 mHandler = handler; 2991 } 2992 2993 void observe(Uri uri, int what) { 2994 mUriEventMap.put(uri, what); 2995 final ContentResolver resolver = mContext.getContentResolver(); 2996 resolver.registerContentObserver(uri, false, this); 2997 } 2998 2999 @Override 3000 public void onChange(boolean selfChange) { 3001 Slog.wtf(TAG, "Should never be reached."); 3002 } 3003 3004 @Override 3005 public void onChange(boolean selfChange, Uri uri) { 3006 final Integer what = mUriEventMap.get(uri); 3007 if (what != null) { 3008 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3009 } else { 3010 loge("No matching event to send for URI=" + uri); 3011 } 3012 } 3013 } 3014 3015 private static void log(String s) { 3016 Slog.d(TAG, s); 3017 } 3018 3019 private static void loge(String s) { 3020 Slog.e(TAG, s); 3021 } 3022 3023 private static <T> T checkNotNull(T value, String message) { 3024 if (value == null) { 3025 throw new NullPointerException(message); 3026 } 3027 return value; 3028 } 3029 3030 /** 3031 * Prepare for a VPN application. 3032 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3033 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3034 * 3035 * @param oldPackage Package name of the application which currently controls VPN, which will 3036 * be replaced. If there is no such application, this should should either be 3037 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3038 * @param newPackage Package name of the application which should gain control of VPN, or 3039 * {@code null} to disable. 3040 * @param userId User for whom to prepare the new VPN. 3041 * 3042 * @hide 3043 */ 3044 @Override 3045 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3046 int userId) { 3047 enforceCrossUserPermission(userId); 3048 throwIfLockdownEnabled(); 3049 3050 synchronized(mVpns) { 3051 Vpn vpn = mVpns.get(userId); 3052 if (vpn != null) { 3053 return vpn.prepare(oldPackage, newPackage); 3054 } else { 3055 return false; 3056 } 3057 } 3058 } 3059 3060 /** 3061 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3062 * This method is used by system-privileged apps. 3063 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3064 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3065 * 3066 * @param packageName The package for which authorization state should change. 3067 * @param userId User for whom {@code packageName} is installed. 3068 * @param authorized {@code true} if this app should be able to start a VPN connection without 3069 * explicit user approval, {@code false} if not. 3070 * 3071 * @hide 3072 */ 3073 @Override 3074 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3075 enforceCrossUserPermission(userId); 3076 3077 synchronized(mVpns) { 3078 Vpn vpn = mVpns.get(userId); 3079 if (vpn != null) { 3080 vpn.setPackageAuthorization(packageName, authorized); 3081 } 3082 } 3083 } 3084 3085 /** 3086 * Configure a TUN interface and return its file descriptor. Parameters 3087 * are encoded and opaque to this class. This method is used by VpnBuilder 3088 * and not available in ConnectivityManager. Permissions are checked in 3089 * Vpn class. 3090 * @hide 3091 */ 3092 @Override 3093 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3094 throwIfLockdownEnabled(); 3095 int user = UserHandle.getUserId(Binder.getCallingUid()); 3096 synchronized(mVpns) { 3097 return mVpns.get(user).establish(config); 3098 } 3099 } 3100 3101 /** 3102 * Start legacy VPN, controlling native daemons as needed. Creates a 3103 * secondary thread to perform connection work, returning quickly. 3104 */ 3105 @Override 3106 public void startLegacyVpn(VpnProfile profile) { 3107 throwIfLockdownEnabled(); 3108 final LinkProperties egress = getActiveLinkProperties(); 3109 if (egress == null) { 3110 throw new IllegalStateException("Missing active network connection"); 3111 } 3112 int user = UserHandle.getUserId(Binder.getCallingUid()); 3113 synchronized(mVpns) { 3114 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3115 } 3116 } 3117 3118 /** 3119 * Return the information of the ongoing legacy VPN. This method is used 3120 * by VpnSettings and not available in ConnectivityManager. Permissions 3121 * are checked in Vpn class. 3122 */ 3123 @Override 3124 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3125 enforceCrossUserPermission(userId); 3126 if (mLockdownEnabled) { 3127 return null; 3128 } 3129 3130 synchronized(mVpns) { 3131 return mVpns.get(userId).getLegacyVpnInfo(); 3132 } 3133 } 3134 3135 /** 3136 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3137 * and not available in ConnectivityManager. 3138 */ 3139 @Override 3140 public VpnInfo[] getAllVpnInfo() { 3141 enforceConnectivityInternalPermission(); 3142 if (mLockdownEnabled) { 3143 return new VpnInfo[0]; 3144 } 3145 3146 synchronized(mVpns) { 3147 List<VpnInfo> infoList = new ArrayList<>(); 3148 for (int i = 0; i < mVpns.size(); i++) { 3149 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3150 if (info != null) { 3151 infoList.add(info); 3152 } 3153 } 3154 return infoList.toArray(new VpnInfo[infoList.size()]); 3155 } 3156 } 3157 3158 /** 3159 * @return VPN information for accounting, or null if we can't retrieve all required 3160 * information, e.g primary underlying iface. 3161 */ 3162 @Nullable 3163 private VpnInfo createVpnInfo(Vpn vpn) { 3164 VpnInfo info = vpn.getVpnInfo(); 3165 if (info == null) { 3166 return null; 3167 } 3168 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3169 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3170 // the underlyingNetworks list. 3171 if (underlyingNetworks == null) { 3172 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3173 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3174 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3175 } 3176 } else if (underlyingNetworks.length > 0) { 3177 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3178 if (linkProperties != null) { 3179 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3180 } 3181 } 3182 return info.primaryUnderlyingIface == null ? null : info; 3183 } 3184 3185 /** 3186 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3187 * VpnDialogs and not available in ConnectivityManager. 3188 * Permissions are checked in Vpn class. 3189 * @hide 3190 */ 3191 @Override 3192 public VpnConfig getVpnConfig(int userId) { 3193 enforceCrossUserPermission(userId); 3194 synchronized(mVpns) { 3195 Vpn vpn = mVpns.get(userId); 3196 if (vpn != null) { 3197 return vpn.getVpnConfig(); 3198 } else { 3199 return null; 3200 } 3201 } 3202 } 3203 3204 @Override 3205 public boolean updateLockdownVpn() { 3206 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3207 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3208 return false; 3209 } 3210 3211 // Tear down existing lockdown if profile was removed 3212 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3213 if (mLockdownEnabled) { 3214 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3215 final VpnProfile profile = VpnProfile.decode( 3216 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3217 if (profile == null) { 3218 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3219 setLockdownTracker(null); 3220 return true; 3221 } 3222 int user = UserHandle.getUserId(Binder.getCallingUid()); 3223 synchronized(mVpns) { 3224 Vpn vpn = mVpns.get(user); 3225 if (vpn == null) { 3226 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3227 return false; 3228 } 3229 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3230 } 3231 } else { 3232 setLockdownTracker(null); 3233 } 3234 3235 return true; 3236 } 3237 3238 /** 3239 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3240 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3241 */ 3242 private void setLockdownTracker(LockdownVpnTracker tracker) { 3243 // Shutdown any existing tracker 3244 final LockdownVpnTracker existing = mLockdownTracker; 3245 mLockdownTracker = null; 3246 if (existing != null) { 3247 existing.shutdown(); 3248 } 3249 3250 try { 3251 if (tracker != null) { 3252 mNetd.setFirewallEnabled(true); 3253 mNetd.setFirewallInterfaceRule("lo", true); 3254 mLockdownTracker = tracker; 3255 mLockdownTracker.init(); 3256 } else { 3257 mNetd.setFirewallEnabled(false); 3258 } 3259 } catch (RemoteException e) { 3260 // ignored; NMS lives inside system_server 3261 } 3262 } 3263 3264 private void throwIfLockdownEnabled() { 3265 if (mLockdownEnabled) { 3266 throw new IllegalStateException("Unavailable in lockdown mode"); 3267 } 3268 } 3269 3270 /** 3271 * Sets up or tears down the always-on VPN for user {@param user} as appropriate. 3272 * 3273 * @return {@code false} in case of errors; {@code true} otherwise. 3274 */ 3275 private boolean updateAlwaysOnVpn(int user) { 3276 final String lockdownPackage = getAlwaysOnVpnPackage(user); 3277 if (lockdownPackage == null) { 3278 return true; 3279 } 3280 3281 // Create an intent to start the VPN service declared in the app's manifest. 3282 Intent serviceIntent = new Intent(VpnConfig.SERVICE_INTERFACE); 3283 serviceIntent.setPackage(lockdownPackage); 3284 3285 try { 3286 return mContext.startServiceAsUser(serviceIntent, UserHandle.of(user)) != null; 3287 } catch (RuntimeException e) { 3288 return false; 3289 } 3290 } 3291 3292 @Override 3293 public boolean setAlwaysOnVpnPackage(int userId, String packageName) { 3294 enforceConnectivityInternalPermission(); 3295 enforceCrossUserPermission(userId); 3296 3297 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3298 if (LockdownVpnTracker.isEnabled()) { 3299 return false; 3300 } 3301 3302 // If the current VPN package is the same as the new one, this is a no-op 3303 final String oldPackage = getAlwaysOnVpnPackage(userId); 3304 if (TextUtils.equals(oldPackage, packageName)) { 3305 return true; 3306 } 3307 3308 synchronized (mVpns) { 3309 Vpn vpn = mVpns.get(userId); 3310 if (vpn == null) { 3311 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3312 return false; 3313 } 3314 if (!vpn.setAlwaysOnPackage(packageName)) { 3315 return false; 3316 } 3317 if (!updateAlwaysOnVpn(userId)) { 3318 vpn.setAlwaysOnPackage(null); 3319 return false; 3320 } 3321 } 3322 return true; 3323 } 3324 3325 @Override 3326 public String getAlwaysOnVpnPackage(int userId) { 3327 enforceConnectivityInternalPermission(); 3328 enforceCrossUserPermission(userId); 3329 3330 synchronized (mVpns) { 3331 Vpn vpn = mVpns.get(userId); 3332 if (vpn == null) { 3333 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3334 return null; 3335 } 3336 return vpn.getAlwaysOnPackage(); 3337 } 3338 } 3339 3340 @Override 3341 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3342 // TODO: Remove? Any reason to trigger a provisioning check? 3343 return -1; 3344 } 3345 3346 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3347 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3348 3349 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3350 if (DBG) { 3351 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3352 + " action=" + action); 3353 } 3354 Intent intent = new Intent(action); 3355 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3356 // Concatenate the range of types onto the range of NetIDs. 3357 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3358 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3359 networkType, null, pendingIntent, false); 3360 } 3361 3362 /** 3363 * Show or hide network provisioning notifications. 3364 * 3365 * We use notifications for two purposes: to notify that a network requires sign in 3366 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3367 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3368 * particular network we can display the notification type that was most recently requested. 3369 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3370 * might first display NO_INTERNET, and then when the captive portal check completes, display 3371 * SIGN_IN. 3372 * 3373 * @param id an identifier that uniquely identifies this notification. This must match 3374 * between show and hide calls. We use the NetID value but for legacy callers 3375 * we concatenate the range of types with the range of NetIDs. 3376 */ 3377 private void setProvNotificationVisibleIntent(boolean visible, int id, 3378 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3379 boolean highPriority) { 3380 if (DBG) { 3381 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3382 + " networkType=" + getNetworkTypeName(networkType) 3383 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3384 } 3385 3386 Resources r = Resources.getSystem(); 3387 NotificationManager notificationManager = (NotificationManager) mContext 3388 .getSystemService(Context.NOTIFICATION_SERVICE); 3389 3390 if (visible) { 3391 CharSequence title; 3392 CharSequence details; 3393 int icon; 3394 if (notifyType == NotificationType.NO_INTERNET && 3395 networkType == ConnectivityManager.TYPE_WIFI) { 3396 title = r.getString(R.string.wifi_no_internet, 0); 3397 details = r.getString(R.string.wifi_no_internet_detailed); 3398 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3399 } else if (notifyType == NotificationType.SIGN_IN) { 3400 switch (networkType) { 3401 case ConnectivityManager.TYPE_WIFI: 3402 title = r.getString(R.string.wifi_available_sign_in, 0); 3403 details = r.getString(R.string.network_available_sign_in_detailed, 3404 extraInfo); 3405 icon = R.drawable.stat_notify_wifi_in_range; 3406 break; 3407 case ConnectivityManager.TYPE_MOBILE: 3408 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3409 title = r.getString(R.string.network_available_sign_in, 0); 3410 // TODO: Change this to pull from NetworkInfo once a printable 3411 // name has been added to it 3412 details = mTelephonyManager.getNetworkOperatorName(); 3413 icon = R.drawable.stat_notify_rssi_in_range; 3414 break; 3415 default: 3416 title = r.getString(R.string.network_available_sign_in, 0); 3417 details = r.getString(R.string.network_available_sign_in_detailed, 3418 extraInfo); 3419 icon = R.drawable.stat_notify_rssi_in_range; 3420 break; 3421 } 3422 } else { 3423 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3424 + getNetworkTypeName(networkType)); 3425 return; 3426 } 3427 3428 Notification notification = new Notification.Builder(mContext) 3429 .setWhen(0) 3430 .setSmallIcon(icon) 3431 .setAutoCancel(true) 3432 .setTicker(title) 3433 .setColor(mContext.getColor( 3434 com.android.internal.R.color.system_notification_accent_color)) 3435 .setContentTitle(title) 3436 .setContentText(details) 3437 .setContentIntent(intent) 3438 .setLocalOnly(true) 3439 .setPriority(highPriority ? 3440 Notification.PRIORITY_HIGH : 3441 Notification.PRIORITY_DEFAULT) 3442 .setDefaults(highPriority ? Notification.DEFAULT_ALL : 0) 3443 .setOnlyAlertOnce(true) 3444 .build(); 3445 3446 try { 3447 notificationManager.notify(NOTIFICATION_ID, id, notification); 3448 } catch (NullPointerException npe) { 3449 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3450 npe.printStackTrace(); 3451 } 3452 } else { 3453 try { 3454 notificationManager.cancel(NOTIFICATION_ID, id); 3455 } catch (NullPointerException npe) { 3456 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3457 npe.printStackTrace(); 3458 } 3459 } 3460 } 3461 3462 /** Location to an updatable file listing carrier provisioning urls. 3463 * An example: 3464 * 3465 * <?xml version="1.0" encoding="utf-8"?> 3466 * <provisioningUrls> 3467 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3468 * </provisioningUrls> 3469 */ 3470 private static final String PROVISIONING_URL_PATH = 3471 "/data/misc/radio/provisioning_urls.xml"; 3472 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3473 3474 /** XML tag for root element. */ 3475 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3476 /** XML tag for individual url */ 3477 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3478 /** XML attribute for mcc */ 3479 private static final String ATTR_MCC = "mcc"; 3480 /** XML attribute for mnc */ 3481 private static final String ATTR_MNC = "mnc"; 3482 3483 private String getProvisioningUrlBaseFromFile() { 3484 FileReader fileReader = null; 3485 XmlPullParser parser = null; 3486 Configuration config = mContext.getResources().getConfiguration(); 3487 3488 try { 3489 fileReader = new FileReader(mProvisioningUrlFile); 3490 parser = Xml.newPullParser(); 3491 parser.setInput(fileReader); 3492 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3493 3494 while (true) { 3495 XmlUtils.nextElement(parser); 3496 3497 String element = parser.getName(); 3498 if (element == null) break; 3499 3500 if (element.equals(TAG_PROVISIONING_URL)) { 3501 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3502 try { 3503 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3504 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3505 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3506 parser.next(); 3507 if (parser.getEventType() == XmlPullParser.TEXT) { 3508 return parser.getText(); 3509 } 3510 } 3511 } 3512 } catch (NumberFormatException e) { 3513 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3514 } 3515 } 3516 } 3517 return null; 3518 } catch (FileNotFoundException e) { 3519 loge("Carrier Provisioning Urls file not found"); 3520 } catch (XmlPullParserException e) { 3521 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3522 } catch (IOException e) { 3523 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3524 } finally { 3525 if (fileReader != null) { 3526 try { 3527 fileReader.close(); 3528 } catch (IOException e) {} 3529 } 3530 } 3531 return null; 3532 } 3533 3534 @Override 3535 public String getMobileProvisioningUrl() { 3536 enforceConnectivityInternalPermission(); 3537 String url = getProvisioningUrlBaseFromFile(); 3538 if (TextUtils.isEmpty(url)) { 3539 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3540 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3541 } else { 3542 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3543 } 3544 // populate the iccid, imei and phone number in the provisioning url. 3545 if (!TextUtils.isEmpty(url)) { 3546 String phoneNumber = mTelephonyManager.getLine1Number(); 3547 if (TextUtils.isEmpty(phoneNumber)) { 3548 phoneNumber = "0000000000"; 3549 } 3550 url = String.format(url, 3551 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3552 mTelephonyManager.getDeviceId() /* IMEI */, 3553 phoneNumber /* Phone numer */); 3554 } 3555 3556 return url; 3557 } 3558 3559 @Override 3560 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3561 String action) { 3562 enforceConnectivityInternalPermission(); 3563 final long ident = Binder.clearCallingIdentity(); 3564 try { 3565 setProvNotificationVisible(visible, networkType, action); 3566 } finally { 3567 Binder.restoreCallingIdentity(ident); 3568 } 3569 } 3570 3571 @Override 3572 public void setAirplaneMode(boolean enable) { 3573 enforceConnectivityInternalPermission(); 3574 final long ident = Binder.clearCallingIdentity(); 3575 try { 3576 final ContentResolver cr = mContext.getContentResolver(); 3577 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3578 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3579 intent.putExtra("state", enable); 3580 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3581 } finally { 3582 Binder.restoreCallingIdentity(ident); 3583 } 3584 } 3585 3586 private void onUserStart(int userId) { 3587 synchronized(mVpns) { 3588 Vpn userVpn = mVpns.get(userId); 3589 if (userVpn != null) { 3590 loge("Starting user already has a VPN"); 3591 return; 3592 } 3593 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3594 mVpns.put(userId, userVpn); 3595 } 3596 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3597 updateLockdownVpn(); 3598 } else { 3599 updateAlwaysOnVpn(userId); 3600 } 3601 } 3602 3603 private void onUserStop(int userId) { 3604 synchronized(mVpns) { 3605 Vpn userVpn = mVpns.get(userId); 3606 if (userVpn == null) { 3607 loge("Stopping user has no VPN"); 3608 return; 3609 } 3610 mVpns.delete(userId); 3611 } 3612 } 3613 3614 private void onUserAdded(int userId) { 3615 synchronized(mVpns) { 3616 final int vpnsSize = mVpns.size(); 3617 for (int i = 0; i < vpnsSize; i++) { 3618 Vpn vpn = mVpns.valueAt(i); 3619 vpn.onUserAdded(userId); 3620 } 3621 } 3622 } 3623 3624 private void onUserRemoved(int userId) { 3625 synchronized(mVpns) { 3626 final int vpnsSize = mVpns.size(); 3627 for (int i = 0; i < vpnsSize; i++) { 3628 Vpn vpn = mVpns.valueAt(i); 3629 vpn.onUserRemoved(userId); 3630 } 3631 } 3632 } 3633 3634 private void onUserUnlocked(int userId) { 3635 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3636 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3637 updateLockdownVpn(); 3638 } else { 3639 updateAlwaysOnVpn(userId); 3640 } 3641 } 3642 3643 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3644 @Override 3645 public void onReceive(Context context, Intent intent) { 3646 final String action = intent.getAction(); 3647 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3648 if (userId == UserHandle.USER_NULL) return; 3649 3650 if (Intent.ACTION_USER_STARTING.equals(action)) { 3651 onUserStart(userId); 3652 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3653 onUserStop(userId); 3654 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3655 onUserAdded(userId); 3656 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3657 onUserRemoved(userId); 3658 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3659 onUserUnlocked(userId); 3660 } 3661 } 3662 }; 3663 3664 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3665 new HashMap<Messenger, NetworkFactoryInfo>(); 3666 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3667 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3668 3669 private static class NetworkFactoryInfo { 3670 public final String name; 3671 public final Messenger messenger; 3672 public final AsyncChannel asyncChannel; 3673 3674 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3675 this.name = name; 3676 this.messenger = messenger; 3677 this.asyncChannel = asyncChannel; 3678 } 3679 } 3680 3681 /** 3682 * A NetworkRequest as registered by an application can be one of three 3683 * types: 3684 * 3685 * - "listen", for which the framework will issue callbacks about any 3686 * and all networks that match the specified NetworkCapabilities, 3687 * 3688 * - "request", capable of causing a specific network to be created 3689 * first (e.g. a telephony DUN request), the framework will issue 3690 * callbacks about the single, highest scoring current network 3691 * (if any) that matches the specified NetworkCapabilities, or 3692 * 3693 * - "track the default network", a hybrid of the two designed such 3694 * that the framework will issue callbacks for the single, highest 3695 * scoring current network (if any) that matches the capabilities of 3696 * the default Internet request (mDefaultRequest), but which cannot 3697 * cause the framework to either create or retain the existence of 3698 * any specific network. 3699 * 3700 */ 3701 private static enum NetworkRequestType { 3702 LISTEN, 3703 TRACK_DEFAULT, 3704 REQUEST 3705 }; 3706 3707 /** 3708 * Tracks info about the requester. 3709 * Also used to notice when the calling process dies so we can self-expire 3710 */ 3711 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3712 final NetworkRequest request; 3713 final PendingIntent mPendingIntent; 3714 boolean mPendingIntentSent; 3715 private final IBinder mBinder; 3716 final int mPid; 3717 final int mUid; 3718 final Messenger messenger; 3719 private final NetworkRequestType mType; 3720 3721 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, NetworkRequestType type) { 3722 request = r; 3723 mPendingIntent = pi; 3724 messenger = null; 3725 mBinder = null; 3726 mPid = getCallingPid(); 3727 mUid = getCallingUid(); 3728 mType = type; 3729 } 3730 3731 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, NetworkRequestType type) { 3732 super(); 3733 messenger = m; 3734 request = r; 3735 mBinder = binder; 3736 mPid = getCallingPid(); 3737 mUid = getCallingUid(); 3738 mType = type; 3739 mPendingIntent = null; 3740 3741 try { 3742 mBinder.linkToDeath(this, 0); 3743 } catch (RemoteException e) { 3744 binderDied(); 3745 } 3746 } 3747 3748 private String typeString() { 3749 switch (mType) { 3750 case LISTEN: return "Listen"; 3751 case REQUEST: return "Request"; 3752 case TRACK_DEFAULT: return "Track default"; 3753 default: 3754 return "unknown type"; 3755 } 3756 } 3757 3758 void unlinkDeathRecipient() { 3759 if (mBinder != null) { 3760 mBinder.unlinkToDeath(this, 0); 3761 } 3762 } 3763 3764 public void binderDied() { 3765 log("ConnectivityService NetworkRequestInfo binderDied(" + 3766 request + ", " + mBinder + ")"); 3767 releaseNetworkRequest(request); 3768 } 3769 3770 /** 3771 * Returns true iff. the contained NetworkRequest is one that: 3772 * 3773 * - should be associated with at most one satisfying network 3774 * at a time; 3775 * 3776 * - should cause a network to be kept up if it is the only network 3777 * which can satisfy the NetworkReqeust. 3778 * 3779 * For full detail of how isRequest() is used for pairing Networks with 3780 * NetworkRequests read rematchNetworkAndRequests(). 3781 * 3782 * TODO: Rename to something more properly descriptive. 3783 */ 3784 public boolean isRequest() { 3785 return (mType == NetworkRequestType.TRACK_DEFAULT) || 3786 (mType == NetworkRequestType.REQUEST); 3787 } 3788 3789 public String toString() { 3790 return typeString() + 3791 " from uid/pid:" + mUid + "/" + mPid + 3792 " for " + request + 3793 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3794 } 3795 } 3796 3797 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3798 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3799 if (badCapability != null) { 3800 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3801 } 3802 } 3803 3804 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3805 final SortedSet<Integer> thresholds = new TreeSet(); 3806 synchronized (nai) { 3807 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3808 if (nri.request.networkCapabilities.hasSignalStrength() && 3809 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3810 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3811 } 3812 } 3813 } 3814 return new ArrayList<Integer>(thresholds); 3815 } 3816 3817 private void updateSignalStrengthThresholds( 3818 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3819 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3820 Bundle thresholds = new Bundle(); 3821 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3822 3823 // TODO: Switch to VDBG. 3824 if (DBG) { 3825 String detail; 3826 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3827 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3828 } else { 3829 detail = reason; 3830 } 3831 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3832 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3833 } 3834 3835 nai.asyncChannel.sendMessage( 3836 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3837 0, 0, thresholds); 3838 } 3839 3840 @Override 3841 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3842 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3843 final NetworkRequestType type = (networkCapabilities == null) 3844 ? NetworkRequestType.TRACK_DEFAULT 3845 : NetworkRequestType.REQUEST; 3846 // If the requested networkCapabilities is null, take them instead from 3847 // the default network request. This allows callers to keep track of 3848 // the system default network. 3849 if (type == NetworkRequestType.TRACK_DEFAULT) { 3850 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 3851 enforceAccessPermission(); 3852 } else { 3853 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3854 enforceNetworkRequestPermissions(networkCapabilities); 3855 } 3856 enforceMeteredApnPolicy(networkCapabilities); 3857 ensureRequestableCapabilities(networkCapabilities); 3858 3859 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3860 throw new IllegalArgumentException("Bad timeout specified"); 3861 } 3862 3863 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 3864 .equals(networkCapabilities.getNetworkSpecifier())) { 3865 throw new IllegalArgumentException("Invalid network specifier - must not be '" 3866 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 3867 } 3868 3869 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3870 nextNetworkRequestId()); 3871 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, type); 3872 if (DBG) log("requestNetwork for " + nri); 3873 3874 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3875 if (timeoutMs > 0) { 3876 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3877 nri), timeoutMs); 3878 } 3879 return networkRequest; 3880 } 3881 3882 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3883 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 3884 enforceConnectivityInternalPermission(); 3885 } else { 3886 enforceChangePermission(); 3887 } 3888 } 3889 3890 @Override 3891 public boolean requestBandwidthUpdate(Network network) { 3892 enforceAccessPermission(); 3893 NetworkAgentInfo nai = null; 3894 if (network == null) { 3895 return false; 3896 } 3897 synchronized (mNetworkForNetId) { 3898 nai = mNetworkForNetId.get(network.netId); 3899 } 3900 if (nai != null) { 3901 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3902 return true; 3903 } 3904 return false; 3905 } 3906 3907 3908 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3909 // if UID is restricted, don't allow them to bring up metered APNs 3910 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 3911 final int uidRules; 3912 final int uid = Binder.getCallingUid(); 3913 synchronized(mRulesLock) { 3914 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3915 } 3916 if (uidRules != RULE_ALLOW_ALL) { 3917 // we could silently fail or we can filter the available nets to only give 3918 // them those they have access to. Chose the more useful 3919 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 3920 } 3921 } 3922 } 3923 3924 @Override 3925 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3926 PendingIntent operation) { 3927 checkNotNull(operation, "PendingIntent cannot be null."); 3928 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3929 enforceNetworkRequestPermissions(networkCapabilities); 3930 enforceMeteredApnPolicy(networkCapabilities); 3931 ensureRequestableCapabilities(networkCapabilities); 3932 3933 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3934 nextNetworkRequestId()); 3935 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3936 NetworkRequestType.REQUEST); 3937 if (DBG) log("pendingRequest for " + nri); 3938 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3939 nri)); 3940 return networkRequest; 3941 } 3942 3943 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3944 mHandler.sendMessageDelayed( 3945 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3946 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3947 } 3948 3949 @Override 3950 public void releasePendingNetworkRequest(PendingIntent operation) { 3951 checkNotNull(operation, "PendingIntent cannot be null."); 3952 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3953 getCallingUid(), 0, operation)); 3954 } 3955 3956 // In order to implement the compatibility measure for pre-M apps that call 3957 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 3958 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 3959 // This ensures it has permission to do so. 3960 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 3961 if (nc == null) { 3962 return false; 3963 } 3964 int[] transportTypes = nc.getTransportTypes(); 3965 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 3966 return false; 3967 } 3968 try { 3969 mContext.enforceCallingOrSelfPermission( 3970 android.Manifest.permission.ACCESS_WIFI_STATE, 3971 "ConnectivityService"); 3972 } catch (SecurityException e) { 3973 return false; 3974 } 3975 return true; 3976 } 3977 3978 @Override 3979 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 3980 Messenger messenger, IBinder binder) { 3981 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3982 enforceAccessPermission(); 3983 } 3984 3985 NetworkRequest networkRequest = new NetworkRequest( 3986 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3987 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3988 NetworkRequestType.LISTEN); 3989 if (DBG) log("listenForNetwork for " + nri); 3990 3991 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3992 return networkRequest; 3993 } 3994 3995 @Override 3996 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 3997 PendingIntent operation) { 3998 checkNotNull(operation, "PendingIntent cannot be null."); 3999 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4000 enforceAccessPermission(); 4001 } 4002 4003 NetworkRequest networkRequest = new NetworkRequest( 4004 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 4005 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 4006 NetworkRequestType.LISTEN); 4007 if (DBG) log("pendingListenForNetwork for " + nri); 4008 4009 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4010 } 4011 4012 @Override 4013 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4014 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 4015 0, networkRequest)); 4016 } 4017 4018 @Override 4019 public void registerNetworkFactory(Messenger messenger, String name) { 4020 enforceConnectivityInternalPermission(); 4021 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4022 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4023 } 4024 4025 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4026 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4027 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4028 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4029 } 4030 4031 @Override 4032 public void unregisterNetworkFactory(Messenger messenger) { 4033 enforceConnectivityInternalPermission(); 4034 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4035 } 4036 4037 private void handleUnregisterNetworkFactory(Messenger messenger) { 4038 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4039 if (nfi == null) { 4040 loge("Failed to find Messenger in unregisterNetworkFactory"); 4041 return; 4042 } 4043 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4044 } 4045 4046 /** 4047 * NetworkAgentInfo supporting a request by requestId. 4048 * These have already been vetted (their Capabilities satisfy the request) 4049 * and the are the highest scored network available. 4050 * the are keyed off the Requests requestId. 4051 */ 4052 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4053 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4054 new SparseArray<NetworkAgentInfo>(); 4055 4056 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4057 @GuardedBy("mNetworkForNetId") 4058 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4059 new SparseArray<NetworkAgentInfo>(); 4060 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4061 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4062 // there may not be a strict 1:1 correlation between the two. 4063 @GuardedBy("mNetworkForNetId") 4064 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4065 4066 // NetworkAgentInfo keyed off its connecting messenger 4067 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4068 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4069 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4070 new HashMap<Messenger, NetworkAgentInfo>(); 4071 4072 @GuardedBy("mBlockedAppUids") 4073 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4074 4075 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4076 private final NetworkRequest mDefaultRequest; 4077 4078 // Request used to optionally keep mobile data active even when higher 4079 // priority networks like Wi-Fi are active. 4080 private final NetworkRequest mDefaultMobileDataRequest; 4081 4082 private NetworkAgentInfo getDefaultNetwork() { 4083 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4084 } 4085 4086 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4087 return nai == getDefaultNetwork(); 4088 } 4089 4090 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4091 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4092 int currentScore, NetworkMisc networkMisc) { 4093 enforceConnectivityInternalPermission(); 4094 4095 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4096 // satisfies mDefaultRequest. 4097 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4098 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4099 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4100 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4101 synchronized (this) { 4102 nai.networkMonitor.systemReady = mSystemReady; 4103 } 4104 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network); 4105 if (DBG) log("registerNetworkAgent " + nai); 4106 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4107 return nai.network.netId; 4108 } 4109 4110 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4111 if (VDBG) log("Got NetworkAgent Messenger"); 4112 mNetworkAgentInfos.put(na.messenger, na); 4113 synchronized (mNetworkForNetId) { 4114 mNetworkForNetId.put(na.network.netId, na); 4115 } 4116 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4117 NetworkInfo networkInfo = na.networkInfo; 4118 na.networkInfo = null; 4119 updateNetworkInfo(na, networkInfo); 4120 } 4121 4122 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4123 LinkProperties newLp = networkAgent.linkProperties; 4124 int netId = networkAgent.network.netId; 4125 4126 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4127 // we do anything else, make sure its LinkProperties are accurate. 4128 if (networkAgent.clatd != null) { 4129 networkAgent.clatd.fixupLinkProperties(oldLp); 4130 } 4131 4132 updateInterfaces(newLp, oldLp, netId); 4133 updateMtu(newLp, oldLp); 4134 // TODO - figure out what to do for clat 4135// for (LinkProperties lp : newLp.getStackedLinks()) { 4136// updateMtu(lp, null); 4137// } 4138 updateTcpBufferSizes(networkAgent); 4139 4140 updateRoutes(newLp, oldLp, netId); 4141 updateDnses(newLp, oldLp, netId); 4142 4143 updateClat(newLp, oldLp, networkAgent); 4144 if (isDefaultNetwork(networkAgent)) { 4145 handleApplyDefaultProxy(newLp.getHttpProxy()); 4146 } else { 4147 updateProxy(newLp, oldLp, networkAgent); 4148 } 4149 // TODO - move this check to cover the whole function 4150 if (!Objects.equals(newLp, oldLp)) { 4151 notifyIfacesChangedForNetworkStats(); 4152 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4153 } 4154 4155 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4156 } 4157 4158 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4159 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4160 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4161 4162 if (!wasRunningClat && shouldRunClat) { 4163 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4164 nai.clatd.start(); 4165 } else if (wasRunningClat && !shouldRunClat) { 4166 nai.clatd.stop(); 4167 } 4168 } 4169 4170 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4171 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4172 if (oldLp != null) { 4173 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4174 } else if (newLp != null) { 4175 interfaceDiff.added = newLp.getAllInterfaceNames(); 4176 } 4177 for (String iface : interfaceDiff.added) { 4178 try { 4179 if (DBG) log("Adding iface " + iface + " to network " + netId); 4180 mNetd.addInterfaceToNetwork(iface, netId); 4181 } catch (Exception e) { 4182 loge("Exception adding interface: " + e); 4183 } 4184 } 4185 for (String iface : interfaceDiff.removed) { 4186 try { 4187 if (DBG) log("Removing iface " + iface + " from network " + netId); 4188 mNetd.removeInterfaceFromNetwork(iface, netId); 4189 } catch (Exception e) { 4190 loge("Exception removing interface: " + e); 4191 } 4192 } 4193 } 4194 4195 /** 4196 * Have netd update routes from oldLp to newLp. 4197 * @return true if routes changed between oldLp and newLp 4198 */ 4199 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4200 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4201 if (oldLp != null) { 4202 routeDiff = oldLp.compareAllRoutes(newLp); 4203 } else if (newLp != null) { 4204 routeDiff.added = newLp.getAllRoutes(); 4205 } 4206 4207 // add routes before removing old in case it helps with continuous connectivity 4208 4209 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4210 for (RouteInfo route : routeDiff.added) { 4211 if (route.hasGateway()) continue; 4212 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4213 try { 4214 mNetd.addRoute(netId, route); 4215 } catch (Exception e) { 4216 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4217 loge("Exception in addRoute for non-gateway: " + e); 4218 } 4219 } 4220 } 4221 for (RouteInfo route : routeDiff.added) { 4222 if (route.hasGateway() == false) continue; 4223 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4224 try { 4225 mNetd.addRoute(netId, route); 4226 } catch (Exception e) { 4227 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4228 loge("Exception in addRoute for gateway: " + e); 4229 } 4230 } 4231 } 4232 4233 for (RouteInfo route : routeDiff.removed) { 4234 if (DBG) log("Removing Route [" + route + "] from network " + netId); 4235 try { 4236 mNetd.removeRoute(netId, route); 4237 } catch (Exception e) { 4238 loge("Exception in removeRoute: " + e); 4239 } 4240 } 4241 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4242 } 4243 4244 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4245 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4246 return; // no updating necessary 4247 } 4248 4249 Collection<InetAddress> dnses = newLp.getDnsServers(); 4250 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 4251 try { 4252 mNetd.setDnsServersForNetwork( 4253 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4254 } catch (Exception e) { 4255 loge("Exception in setDnsServersForNetwork: " + e); 4256 } 4257 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4258 if (defaultNai != null && defaultNai.network.netId == netId) { 4259 setDefaultDnsSystemProperties(dnses); 4260 } 4261 flushVmDnsCache(); 4262 } 4263 4264 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4265 int last = 0; 4266 for (InetAddress dns : dnses) { 4267 ++last; 4268 String key = "net.dns" + last; 4269 String value = dns.getHostAddress(); 4270 SystemProperties.set(key, value); 4271 } 4272 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4273 String key = "net.dns" + i; 4274 SystemProperties.set(key, ""); 4275 } 4276 mNumDnsEntries = last; 4277 } 4278 4279 /** 4280 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4281 * augmented with any stateful capabilities implied from {@code networkAgent} 4282 * (e.g., validated status and captive portal status). 4283 * 4284 * @param nai the network having its capabilities updated. 4285 * @param networkCapabilities the new network capabilities. 4286 */ 4287 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4288 // Don't modify caller's NetworkCapabilities. 4289 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4290 if (nai.lastValidated) { 4291 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4292 } else { 4293 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4294 } 4295 if (nai.lastCaptivePortalDetected) { 4296 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4297 } else { 4298 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4299 } 4300 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4301 final int oldScore = nai.getCurrentScore(); 4302 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4303 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4304 try { 4305 mNetd.setNetworkPermission(nai.network.netId, 4306 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4307 null : NetworkManagementService.PERMISSION_SYSTEM); 4308 } catch (RemoteException e) { 4309 loge("Exception in setNetworkPermission: " + e); 4310 } 4311 } 4312 synchronized (nai) { 4313 nai.networkCapabilities = networkCapabilities; 4314 } 4315 rematchAllNetworksAndRequests(nai, oldScore); 4316 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4317 } 4318 } 4319 4320 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4321 for (int i = 0; i < nai.networkRequests.size(); i++) { 4322 NetworkRequest nr = nai.networkRequests.valueAt(i); 4323 // Don't send listening requests to factories. b/17393458 4324 if (!isRequest(nr)) continue; 4325 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4326 } 4327 } 4328 4329 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4330 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4331 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4332 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4333 networkRequest); 4334 } 4335 } 4336 4337 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4338 int notificationType) { 4339 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4340 Intent intent = new Intent(); 4341 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4342 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4343 nri.mPendingIntentSent = true; 4344 sendIntent(nri.mPendingIntent, intent); 4345 } 4346 // else not handled 4347 } 4348 4349 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4350 mPendingIntentWakeLock.acquire(); 4351 try { 4352 if (DBG) log("Sending " + pendingIntent); 4353 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4354 } catch (PendingIntent.CanceledException e) { 4355 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4356 mPendingIntentWakeLock.release(); 4357 releasePendingNetworkRequest(pendingIntent); 4358 } 4359 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4360 } 4361 4362 @Override 4363 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4364 String resultData, Bundle resultExtras) { 4365 if (DBG) log("Finished sending " + pendingIntent); 4366 mPendingIntentWakeLock.release(); 4367 // Release with a delay so the receiving client has an opportunity to put in its 4368 // own request. 4369 releasePendingNetworkRequestWithDelay(pendingIntent); 4370 } 4371 4372 private void callCallbackForRequest(NetworkRequestInfo nri, 4373 NetworkAgentInfo networkAgent, int notificationType) { 4374 if (nri.messenger == null) return; // Default request has no msgr 4375 Bundle bundle = new Bundle(); 4376 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4377 new NetworkRequest(nri.request)); 4378 Message msg = Message.obtain(); 4379 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4380 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4381 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4382 } 4383 switch (notificationType) { 4384 case ConnectivityManager.CALLBACK_LOSING: { 4385 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4386 break; 4387 } 4388 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4389 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4390 new NetworkCapabilities(networkAgent.networkCapabilities)); 4391 break; 4392 } 4393 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4394 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4395 new LinkProperties(networkAgent.linkProperties)); 4396 break; 4397 } 4398 } 4399 msg.what = notificationType; 4400 msg.setData(bundle); 4401 try { 4402 if (VDBG) { 4403 log("sending notification " + notifyTypeToName(notificationType) + 4404 " for " + nri.request); 4405 } 4406 nri.messenger.send(msg); 4407 } catch (RemoteException e) { 4408 // may occur naturally in the race of binder death. 4409 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4410 } 4411 } 4412 4413 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4414 for (int i = 0; i < nai.networkRequests.size(); i++) { 4415 NetworkRequest nr = nai.networkRequests.valueAt(i); 4416 // Ignore listening requests. 4417 if (!isRequest(nr)) continue; 4418 loge("Dead network still had at least " + nr); 4419 break; 4420 } 4421 nai.asyncChannel.disconnect(); 4422 } 4423 4424 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4425 if (oldNetwork == null) { 4426 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4427 return; 4428 } 4429 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4430 teardownUnneededNetwork(oldNetwork); 4431 } 4432 4433 private void makeDefault(NetworkAgentInfo newNetwork) { 4434 if (DBG) log("Switching to new default network: " + newNetwork); 4435 ConnectivityServiceChangeEvent.logEvent(newNetwork.network.netId); 4436 setupDataActivityTracking(newNetwork); 4437 try { 4438 mNetd.setDefaultNetId(newNetwork.network.netId); 4439 } catch (Exception e) { 4440 loge("Exception setting default network :" + e); 4441 } 4442 notifyLockdownVpn(newNetwork); 4443 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4444 updateTcpBufferSizes(newNetwork); 4445 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4446 } 4447 4448 // Handles a network appearing or improving its score. 4449 // 4450 // - Evaluates all current NetworkRequests that can be 4451 // satisfied by newNetwork, and reassigns to newNetwork 4452 // any such requests for which newNetwork is the best. 4453 // 4454 // - Lingers any validated Networks that as a result are no longer 4455 // needed. A network is needed if it is the best network for 4456 // one or more NetworkRequests, or if it is a VPN. 4457 // 4458 // - Tears down newNetwork if it just became validated 4459 // but turns out to be unneeded. 4460 // 4461 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4462 // networks that have no chance (i.e. even if validated) 4463 // of becoming the highest scoring network. 4464 // 4465 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4466 // it does not remove NetworkRequests that other Networks could better satisfy. 4467 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4468 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4469 // as it performs better by a factor of the number of Networks. 4470 // 4471 // @param newNetwork is the network to be matched against NetworkRequests. 4472 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4473 // performed to tear down unvalidated networks that have no chance (i.e. even if 4474 // validated) of becoming the highest scoring network. 4475 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4476 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4477 if (!newNetwork.created) return; 4478 boolean keep = newNetwork.isVPN(); 4479 boolean isNewDefault = false; 4480 NetworkAgentInfo oldDefaultNetwork = null; 4481 if (VDBG) log("rematching " + newNetwork.name()); 4482 // Find and migrate to this Network any NetworkRequests for 4483 // which this network is now the best. 4484 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4485 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4486 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4487 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4488 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4489 final boolean satisfies = newNetwork.satisfies(nri.request); 4490 if (newNetwork == currentNetwork && satisfies) { 4491 if (VDBG) { 4492 log("Network " + newNetwork.name() + " was already satisfying" + 4493 " request " + nri.request.requestId + ". No change."); 4494 } 4495 keep = true; 4496 continue; 4497 } 4498 4499 // check if it satisfies the NetworkCapabilities 4500 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4501 if (satisfies) { 4502 if (!nri.isRequest()) { 4503 // This is not a request, it's a callback listener. 4504 // Add it to newNetwork regardless of score. 4505 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4506 continue; 4507 } 4508 4509 // next check if it's better than any current network we're using for 4510 // this request 4511 if (VDBG) { 4512 log("currentScore = " + 4513 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4514 ", newScore = " + newNetwork.getCurrentScore()); 4515 } 4516 if (currentNetwork == null || 4517 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4518 if (DBG) log("rematch for " + newNetwork.name()); 4519 if (currentNetwork != null) { 4520 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4521 currentNetwork.networkRequests.remove(nri.request.requestId); 4522 currentNetwork.networkLingered.add(nri.request); 4523 affectedNetworks.add(currentNetwork); 4524 } else { 4525 if (DBG) log(" accepting network in place of null"); 4526 } 4527 unlinger(newNetwork); 4528 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4529 if (!newNetwork.addRequest(nri.request)) { 4530 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4531 } 4532 addedRequests.add(nri); 4533 keep = true; 4534 // Tell NetworkFactories about the new score, so they can stop 4535 // trying to connect if they know they cannot match it. 4536 // TODO - this could get expensive if we have alot of requests for this 4537 // network. Think about if there is a way to reduce this. Push 4538 // netid->request mapping to each factory? 4539 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4540 if (mDefaultRequest.requestId == nri.request.requestId) { 4541 isNewDefault = true; 4542 oldDefaultNetwork = currentNetwork; 4543 } 4544 } 4545 } else if (newNetwork.networkRequests.get(nri.request.requestId) != null) { 4546 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4547 // mark it as no longer satisfying "nri". Because networks are processed by 4548 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4549 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4550 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4551 // This means this code doesn't have to handle the case where "currentNetwork" no 4552 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4553 if (DBG) { 4554 log("Network " + newNetwork.name() + " stopped satisfying" + 4555 " request " + nri.request.requestId); 4556 } 4557 newNetwork.networkRequests.remove(nri.request.requestId); 4558 if (currentNetwork == newNetwork) { 4559 mNetworkForRequestId.remove(nri.request.requestId); 4560 sendUpdatedScoreToFactories(nri.request, 0); 4561 } else { 4562 if (nri.isRequest()) { 4563 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4564 newNetwork.name() + 4565 " without updating mNetworkForRequestId or factories!"); 4566 } 4567 } 4568 // TODO: technically, sending CALLBACK_LOST here is 4569 // incorrect if nri is a request (not a listen) and there 4570 // is a replacement network currently connected that can 4571 // satisfy it. However, the only capability that can both 4572 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4573 // so this code is only incorrect for a network that loses 4574 // the TRUSTED capability, which is a rare case. 4575 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST); 4576 } 4577 } 4578 // Linger any networks that are no longer needed. 4579 for (NetworkAgentInfo nai : affectedNetworks) { 4580 if (nai.lingering) { 4581 // Already lingered. Nothing to do. This can only happen if "nai" is in 4582 // "affectedNetworks" twice. The reasoning being that to get added to 4583 // "affectedNetworks", "nai" must have been satisfying a NetworkRequest 4584 // (i.e. not lingered) so it could have only been lingered by this loop. 4585 // unneeded(nai) will be false and we'll call unlinger() below which would 4586 // be bad, so handle it here. 4587 } else if (unneeded(nai)) { 4588 linger(nai); 4589 } else { 4590 // Clear nai.networkLingered we might have added above. 4591 unlinger(nai); 4592 } 4593 } 4594 if (isNewDefault) { 4595 // Notify system services that this network is up. 4596 makeDefault(newNetwork); 4597 synchronized (ConnectivityService.this) { 4598 // have a new default network, release the transition wakelock in 4599 // a second if it's held. The second pause is to allow apps 4600 // to reconnect over the new network 4601 if (mNetTransitionWakeLock.isHeld()) { 4602 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4603 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4604 mNetTransitionWakeLockSerialNumber, 0), 4605 1000); 4606 } 4607 } 4608 } 4609 4610 // do this after the default net is switched, but 4611 // before LegacyTypeTracker sends legacy broadcasts 4612 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4613 4614 if (isNewDefault) { 4615 // Maintain the illusion: since the legacy API only 4616 // understands one network at a time, we must pretend 4617 // that the current default network disconnected before 4618 // the new one connected. 4619 if (oldDefaultNetwork != null) { 4620 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4621 oldDefaultNetwork, true); 4622 } 4623 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4624 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4625 notifyLockdownVpn(newNetwork); 4626 } 4627 4628 if (keep) { 4629 // Notify battery stats service about this network, both the normal 4630 // interface and any stacked links. 4631 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4632 try { 4633 final IBatteryStats bs = BatteryStatsService.getService(); 4634 final int type = newNetwork.networkInfo.getType(); 4635 4636 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4637 bs.noteNetworkInterfaceType(baseIface, type); 4638 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4639 final String stackedIface = stacked.getInterfaceName(); 4640 bs.noteNetworkInterfaceType(stackedIface, type); 4641 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4642 } 4643 } catch (RemoteException ignored) { 4644 } 4645 4646 // This has to happen after the notifyNetworkCallbacks as that tickles each 4647 // ConnectivityManager instance so that legacy requests correctly bind dns 4648 // requests to this network. The legacy users are listening for this bcast 4649 // and will generally do a dns request so they can ensureRouteToHost and if 4650 // they do that before the callbacks happen they'll use the default network. 4651 // 4652 // TODO: Is there still a race here? We send the broadcast 4653 // after sending the callback, but if the app can receive the 4654 // broadcast before the callback, it might still break. 4655 // 4656 // This *does* introduce a race where if the user uses the new api 4657 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4658 // they may get old info. Reverse this after the old startUsing api is removed. 4659 // This is on top of the multiple intent sequencing referenced in the todo above. 4660 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4661 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4662 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4663 // legacy type tracker filters out repeat adds 4664 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4665 } 4666 } 4667 4668 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4669 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4670 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4671 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4672 if (newNetwork.isVPN()) { 4673 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4674 } 4675 } 4676 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4677 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4678 if (unneeded(nai)) { 4679 if (DBG) log("Reaping " + nai.name()); 4680 teardownUnneededNetwork(nai); 4681 } 4682 } 4683 } 4684 } 4685 4686 /** 4687 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4688 * being disconnected. 4689 * @param changed If only one Network's score or capabilities have been modified since the last 4690 * time this function was called, pass this Network in this argument, otherwise pass 4691 * null. 4692 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4693 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4694 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4695 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4696 * network's score. 4697 */ 4698 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4699 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4700 // to avoid the slowness. It is not simply enough to process just "changed", for 4701 // example in the case where "changed"'s score decreases and another network should begin 4702 // satifying a NetworkRequest that "changed" currently satisfies. 4703 4704 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4705 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4706 // rematchNetworkAndRequests() handles. 4707 if (changed != null && oldScore < changed.getCurrentScore()) { 4708 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP); 4709 } else { 4710 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4711 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4712 // Rematch higher scoring networks first to prevent requests first matching a lower 4713 // scoring network and then a higher scoring network, which could produce multiple 4714 // callbacks and inadvertently unlinger networks. 4715 Arrays.sort(nais); 4716 for (NetworkAgentInfo nai : nais) { 4717 rematchNetworkAndRequests(nai, 4718 // Only reap the last time through the loop. Reaping before all rematching 4719 // is complete could incorrectly teardown a network that hasn't yet been 4720 // rematched. 4721 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4722 : ReapUnvalidatedNetworks.REAP); 4723 } 4724 } 4725 } 4726 4727 private void updateInetCondition(NetworkAgentInfo nai) { 4728 // Don't bother updating until we've graduated to validated at least once. 4729 if (!nai.everValidated) return; 4730 // For now only update icons for default connection. 4731 // TODO: Update WiFi and cellular icons separately. b/17237507 4732 if (!isDefaultNetwork(nai)) return; 4733 4734 int newInetCondition = nai.lastValidated ? 100 : 0; 4735 // Don't repeat publish. 4736 if (newInetCondition == mDefaultInetConditionPublished) return; 4737 4738 mDefaultInetConditionPublished = newInetCondition; 4739 sendInetConditionBroadcast(nai.networkInfo); 4740 } 4741 4742 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4743 if (mLockdownTracker != null) { 4744 if (nai != null && nai.isVPN()) { 4745 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4746 } else { 4747 mLockdownTracker.onNetworkInfoChanged(); 4748 } 4749 } 4750 } 4751 4752 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4753 NetworkInfo.State state = newInfo.getState(); 4754 NetworkInfo oldInfo = null; 4755 final int oldScore = networkAgent.getCurrentScore(); 4756 synchronized (networkAgent) { 4757 oldInfo = networkAgent.networkInfo; 4758 networkAgent.networkInfo = newInfo; 4759 } 4760 notifyLockdownVpn(networkAgent); 4761 4762 if (oldInfo != null && oldInfo.getState() == state) { 4763 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 4764 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 4765 notifyIfacesChangedForNetworkStats(); 4766 } else if (VDBG) log("ignoring duplicate network state non-change"); 4767 // In either case, no further work should be needed. 4768 return; 4769 } 4770 if (DBG) { 4771 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4772 (oldInfo == null ? "null" : oldInfo.getState()) + 4773 " to " + state); 4774 } 4775 4776 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4777 try { 4778 // This should never fail. Specifying an already in use NetID will cause failure. 4779 if (networkAgent.isVPN()) { 4780 mNetd.createVirtualNetwork(networkAgent.network.netId, 4781 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4782 (networkAgent.networkMisc == null || 4783 !networkAgent.networkMisc.allowBypass)); 4784 } else { 4785 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4786 networkAgent.networkCapabilities.hasCapability( 4787 NET_CAPABILITY_NOT_RESTRICTED) ? 4788 null : NetworkManagementService.PERMISSION_SYSTEM); 4789 } 4790 } catch (Exception e) { 4791 loge("Error creating network " + networkAgent.network.netId + ": " 4792 + e.getMessage()); 4793 return; 4794 } 4795 networkAgent.created = true; 4796 updateLinkProperties(networkAgent, null); 4797 notifyIfacesChangedForNetworkStats(); 4798 4799 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4800 scheduleUnvalidatedPrompt(networkAgent); 4801 4802 if (networkAgent.isVPN()) { 4803 // Temporarily disable the default proxy (not global). 4804 synchronized (mProxyLock) { 4805 if (!mDefaultProxyDisabled) { 4806 mDefaultProxyDisabled = true; 4807 if (mGlobalProxy == null && mDefaultProxy != null) { 4808 sendProxyBroadcast(null); 4809 } 4810 } 4811 } 4812 // TODO: support proxy per network. 4813 } 4814 4815 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 4816 // be communicated to a particular NetworkAgent depends only on the network's immutable, 4817 // capabilities, so it only needs to be done once on initial connect, not every time the 4818 // network's capabilities change. Note that we do this before rematching the network, 4819 // so we could decide to tear it down immediately afterwards. That's fine though - on 4820 // disconnection NetworkAgents should stop any signal strength monitoring they have been 4821 // doing. 4822 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 4823 4824 // Consider network even though it is not yet validated. 4825 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP); 4826 4827 // This has to happen after matching the requests, because callbacks are just requests. 4828 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4829 } else if (state == NetworkInfo.State.DISCONNECTED) { 4830 networkAgent.asyncChannel.disconnect(); 4831 if (networkAgent.isVPN()) { 4832 synchronized (mProxyLock) { 4833 if (mDefaultProxyDisabled) { 4834 mDefaultProxyDisabled = false; 4835 if (mGlobalProxy == null && mDefaultProxy != null) { 4836 sendProxyBroadcast(mDefaultProxy); 4837 } 4838 } 4839 } 4840 } 4841 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 4842 state == NetworkInfo.State.SUSPENDED) { 4843 // going into or coming out of SUSPEND: rescore and notify 4844 if (networkAgent.getCurrentScore() != oldScore) { 4845 rematchAllNetworksAndRequests(networkAgent, oldScore); 4846 } 4847 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 4848 ConnectivityManager.CALLBACK_SUSPENDED : 4849 ConnectivityManager.CALLBACK_RESUMED)); 4850 mLegacyTypeTracker.update(networkAgent); 4851 } 4852 } 4853 4854 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4855 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4856 if (score < 0) { 4857 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4858 "). Bumping score to min of 0"); 4859 score = 0; 4860 } 4861 4862 final int oldScore = nai.getCurrentScore(); 4863 nai.setCurrentScore(score); 4864 4865 rematchAllNetworksAndRequests(nai, oldScore); 4866 4867 sendUpdatedScoreToFactories(nai); 4868 } 4869 4870 // notify only this one new request of the current state 4871 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4872 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4873 // TODO - read state from monitor to decide what to send. 4874// if (nai.networkMonitor.isLingering()) { 4875// notifyType = NetworkCallbacks.LOSING; 4876// } else if (nai.networkMonitor.isEvaluating()) { 4877// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4878// } 4879 if (nri.mPendingIntent == null) { 4880 callCallbackForRequest(nri, nai, notifyType); 4881 } else { 4882 sendPendingIntentForRequest(nri, nai, notifyType); 4883 } 4884 } 4885 4886 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 4887 // The NetworkInfo we actually send out has no bearing on the real 4888 // state of affairs. For example, if the default connection is mobile, 4889 // and a request for HIPRI has just gone away, we need to pretend that 4890 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4891 // the state to DISCONNECTED, even though the network is of type MOBILE 4892 // and is still connected. 4893 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4894 info.setType(type); 4895 if (state != DetailedState.DISCONNECTED) { 4896 info.setDetailedState(state, null, info.getExtraInfo()); 4897 sendConnectedBroadcast(info); 4898 } else { 4899 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 4900 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4901 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4902 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4903 if (info.isFailover()) { 4904 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4905 nai.networkInfo.setFailover(false); 4906 } 4907 if (info.getReason() != null) { 4908 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4909 } 4910 if (info.getExtraInfo() != null) { 4911 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4912 } 4913 NetworkAgentInfo newDefaultAgent = null; 4914 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4915 newDefaultAgent = getDefaultNetwork(); 4916 if (newDefaultAgent != null) { 4917 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4918 newDefaultAgent.networkInfo); 4919 } else { 4920 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4921 } 4922 } 4923 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4924 mDefaultInetConditionPublished); 4925 sendStickyBroadcast(intent); 4926 if (newDefaultAgent != null) { 4927 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4928 } 4929 } 4930 } 4931 4932 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4933 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4934 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4935 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4936 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4937 if (VDBG) log(" sending notification for " + nr); 4938 if (nri.mPendingIntent == null) { 4939 callCallbackForRequest(nri, networkAgent, notifyType); 4940 } else { 4941 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4942 } 4943 } 4944 } 4945 4946 private String notifyTypeToName(int notifyType) { 4947 switch (notifyType) { 4948 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4949 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4950 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4951 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4952 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4953 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4954 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4955 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4956 } 4957 return "UNKNOWN"; 4958 } 4959 4960 /** 4961 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 4962 * properties tracked by NetworkStatsService on an active iface has changed. 4963 */ 4964 private void notifyIfacesChangedForNetworkStats() { 4965 try { 4966 mStatsService.forceUpdateIfaces(); 4967 } catch (Exception ignored) { 4968 } 4969 } 4970 4971 @Override 4972 public boolean addVpnAddress(String address, int prefixLength) { 4973 throwIfLockdownEnabled(); 4974 int user = UserHandle.getUserId(Binder.getCallingUid()); 4975 synchronized (mVpns) { 4976 return mVpns.get(user).addAddress(address, prefixLength); 4977 } 4978 } 4979 4980 @Override 4981 public boolean removeVpnAddress(String address, int prefixLength) { 4982 throwIfLockdownEnabled(); 4983 int user = UserHandle.getUserId(Binder.getCallingUid()); 4984 synchronized (mVpns) { 4985 return mVpns.get(user).removeAddress(address, prefixLength); 4986 } 4987 } 4988 4989 @Override 4990 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 4991 throwIfLockdownEnabled(); 4992 int user = UserHandle.getUserId(Binder.getCallingUid()); 4993 boolean success; 4994 synchronized (mVpns) { 4995 success = mVpns.get(user).setUnderlyingNetworks(networks); 4996 } 4997 if (success) { 4998 notifyIfacesChangedForNetworkStats(); 4999 } 5000 return success; 5001 } 5002 5003 @Override 5004 public String getCaptivePortalServerUrl() { 5005 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5006 } 5007 5008 @Override 5009 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5010 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5011 enforceKeepalivePermission(); 5012 mKeepaliveTracker.startNattKeepalive( 5013 getNetworkAgentInfoForNetwork(network), 5014 intervalSeconds, messenger, binder, 5015 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5016 } 5017 5018 @Override 5019 public void stopKeepalive(Network network, int slot) { 5020 mHandler.sendMessage(mHandler.obtainMessage( 5021 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5022 } 5023 5024 @Override 5025 public void factoryReset() { 5026 enforceConnectivityInternalPermission(); 5027 5028 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5029 return; 5030 } 5031 5032 final int userId = UserHandle.getCallingUserId(); 5033 5034 // Turn airplane mode off 5035 setAirplaneMode(false); 5036 5037 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5038 // Untether 5039 for (String tether : getTetheredIfaces()) { 5040 untether(tether); 5041 } 5042 } 5043 5044 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5045 // Turn VPN off 5046 VpnConfig vpnConfig = getVpnConfig(userId); 5047 if (vpnConfig != null) { 5048 if (vpnConfig.legacy) { 5049 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5050 } else { 5051 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5052 // in the future without user intervention. 5053 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5054 5055 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN, userId); 5056 } 5057 } 5058 } 5059 } 5060 5061 @VisibleForTesting 5062 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5063 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5064 return new NetworkMonitor(context, handler, nai, defaultRequest); 5065 } 5066} 5067