ConnectivityService.java revision 9b0c8fd95cd513660acfa990874ad3060403c8f3
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 final int uid = Binder.getCallingUid(); 999 final int user = UserHandle.getUserId(uid); 1000 int vpnNetId = NETID_UNSET; 1001 synchronized (mVpns) { 1002 final Vpn vpn = mVpns.get(user); 1003 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1004 } 1005 NetworkAgentInfo nai; 1006 if (vpnNetId != NETID_UNSET) { 1007 synchronized (mNetworkForNetId) { 1008 nai = mNetworkForNetId.get(vpnNetId); 1009 } 1010 if (nai != null) return nai.network; 1011 } 1012 nai = getDefaultNetwork(); 1013 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 1014 return nai != null ? nai.network : null; 1015 } 1016 1017 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1018 enforceAccessPermission(); 1019 final int uid = Binder.getCallingUid(); 1020 NetworkState state = getUnfilteredActiveNetworkState(uid); 1021 return state.networkInfo; 1022 } 1023 1024 @Override 1025 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 1026 enforceConnectivityInternalPermission(); 1027 NetworkState state = getUnfilteredActiveNetworkState(uid); 1028 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1029 } 1030 1031 @Override 1032 public NetworkInfo getNetworkInfo(int networkType) { 1033 enforceAccessPermission(); 1034 final int uid = Binder.getCallingUid(); 1035 if (getVpnUnderlyingNetworks(uid) != null) { 1036 // A VPN is active, so we may need to return one of its underlying networks. This 1037 // information is not available in LegacyTypeTracker, so we have to get it from 1038 // getUnfilteredActiveNetworkState. 1039 NetworkState state = getUnfilteredActiveNetworkState(uid); 1040 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1041 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1042 } 1043 } 1044 NetworkState state = getFilteredNetworkState(networkType, uid); 1045 return state.networkInfo; 1046 } 1047 1048 @Override 1049 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1050 enforceAccessPermission(); 1051 final int uid = Binder.getCallingUid(); 1052 NetworkInfo info = null; 1053 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1054 if (nai != null) { 1055 synchronized (nai) { 1056 info = new NetworkInfo(nai.networkInfo); 1057 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1058 } 1059 } 1060 return info; 1061 } 1062 1063 @Override 1064 public NetworkInfo[] getAllNetworkInfo() { 1065 enforceAccessPermission(); 1066 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1067 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1068 networkType++) { 1069 NetworkInfo info = getNetworkInfo(networkType); 1070 if (info != null) { 1071 result.add(info); 1072 } 1073 } 1074 return result.toArray(new NetworkInfo[result.size()]); 1075 } 1076 1077 @Override 1078 public Network getNetworkForType(int networkType) { 1079 enforceAccessPermission(); 1080 final int uid = Binder.getCallingUid(); 1081 NetworkState state = getFilteredNetworkState(networkType, uid); 1082 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1083 return state.network; 1084 } 1085 return null; 1086 } 1087 1088 @Override 1089 public Network[] getAllNetworks() { 1090 enforceAccessPermission(); 1091 synchronized (mNetworkForNetId) { 1092 final Network[] result = new Network[mNetworkForNetId.size()]; 1093 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1094 result[i] = mNetworkForNetId.valueAt(i).network; 1095 } 1096 return result; 1097 } 1098 } 1099 1100 @Override 1101 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1102 // The basic principle is: if an app's traffic could possibly go over a 1103 // network, without the app doing anything multinetwork-specific, 1104 // (hence, by "default"), then include that network's capabilities in 1105 // the array. 1106 // 1107 // In the normal case, app traffic only goes over the system's default 1108 // network connection, so that's the only network returned. 1109 // 1110 // With a VPN in force, some app traffic may go into the VPN, and thus 1111 // over whatever underlying networks the VPN specifies, while other app 1112 // traffic may go over the system default network (e.g.: a split-tunnel 1113 // VPN, or an app disallowed by the VPN), so the set of networks 1114 // returned includes the VPN's underlying networks and the system 1115 // default. 1116 enforceAccessPermission(); 1117 1118 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1119 1120 NetworkAgentInfo nai = getDefaultNetwork(); 1121 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1122 if (nc != null) { 1123 result.put(nai.network, nc); 1124 } 1125 1126 if (!mLockdownEnabled) { 1127 synchronized (mVpns) { 1128 Vpn vpn = mVpns.get(userId); 1129 if (vpn != null) { 1130 Network[] networks = vpn.getUnderlyingNetworks(); 1131 if (networks != null) { 1132 for (Network network : networks) { 1133 nai = getNetworkAgentInfoForNetwork(network); 1134 nc = getNetworkCapabilitiesInternal(nai); 1135 if (nc != null) { 1136 result.put(network, nc); 1137 } 1138 } 1139 } 1140 } 1141 } 1142 } 1143 1144 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1145 out = result.values().toArray(out); 1146 return out; 1147 } 1148 1149 @Override 1150 public boolean isNetworkSupported(int networkType) { 1151 enforceAccessPermission(); 1152 return mLegacyTypeTracker.isTypeSupported(networkType); 1153 } 1154 1155 /** 1156 * Return LinkProperties for the active (i.e., connected) default 1157 * network interface. It is assumed that at most one default network 1158 * is active at a time. If more than one is active, it is indeterminate 1159 * which will be returned. 1160 * @return the ip properties for the active network, or {@code null} if 1161 * none is active 1162 */ 1163 @Override 1164 public LinkProperties getActiveLinkProperties() { 1165 enforceAccessPermission(); 1166 final int uid = Binder.getCallingUid(); 1167 NetworkState state = getUnfilteredActiveNetworkState(uid); 1168 return state.linkProperties; 1169 } 1170 1171 @Override 1172 public LinkProperties getLinkPropertiesForType(int networkType) { 1173 enforceAccessPermission(); 1174 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1175 if (nai != null) { 1176 synchronized (nai) { 1177 return new LinkProperties(nai.linkProperties); 1178 } 1179 } 1180 return null; 1181 } 1182 1183 // TODO - this should be ALL networks 1184 @Override 1185 public LinkProperties getLinkProperties(Network network) { 1186 enforceAccessPermission(); 1187 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1188 if (nai != null) { 1189 synchronized (nai) { 1190 return new LinkProperties(nai.linkProperties); 1191 } 1192 } 1193 return null; 1194 } 1195 1196 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1197 if (nai != null) { 1198 synchronized (nai) { 1199 if (nai.networkCapabilities != null) { 1200 return new NetworkCapabilities(nai.networkCapabilities); 1201 } 1202 } 1203 } 1204 return null; 1205 } 1206 1207 @Override 1208 public NetworkCapabilities getNetworkCapabilities(Network network) { 1209 enforceAccessPermission(); 1210 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1211 } 1212 1213 @Override 1214 public NetworkState[] getAllNetworkState() { 1215 // Require internal since we're handing out IMSI details 1216 enforceConnectivityInternalPermission(); 1217 1218 final ArrayList<NetworkState> result = Lists.newArrayList(); 1219 for (Network network : getAllNetworks()) { 1220 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1221 if (nai != null) { 1222 synchronized (nai) { 1223 final String subscriberId = (nai.networkMisc != null) 1224 ? nai.networkMisc.subscriberId : null; 1225 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1226 nai.networkCapabilities, network, subscriberId, null)); 1227 } 1228 } 1229 } 1230 return result.toArray(new NetworkState[result.size()]); 1231 } 1232 1233 @Override 1234 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1235 enforceAccessPermission(); 1236 final int uid = Binder.getCallingUid(); 1237 final long token = Binder.clearCallingIdentity(); 1238 try { 1239 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1240 if (state.networkInfo != null) { 1241 try { 1242 return mPolicyManager.getNetworkQuotaInfo(state); 1243 } catch (RemoteException e) { 1244 } 1245 } 1246 return null; 1247 } finally { 1248 Binder.restoreCallingIdentity(token); 1249 } 1250 } 1251 1252 @Override 1253 public boolean isActiveNetworkMetered() { 1254 enforceAccessPermission(); 1255 final int uid = Binder.getCallingUid(); 1256 final long token = Binder.clearCallingIdentity(); 1257 try { 1258 return isActiveNetworkMeteredUnchecked(uid); 1259 } finally { 1260 Binder.restoreCallingIdentity(token); 1261 } 1262 } 1263 1264 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1265 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1266 if (state.networkInfo != null) { 1267 try { 1268 return mPolicyManager.isNetworkMetered(state); 1269 } catch (RemoteException e) { 1270 } 1271 } 1272 return false; 1273 } 1274 1275 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1276 @Override 1277 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1278 int deviceType = Integer.parseInt(label); 1279 sendDataActivityBroadcast(deviceType, active, tsNanos); 1280 } 1281 }; 1282 1283 /** 1284 * Ensure that a network route exists to deliver traffic to the specified 1285 * host via the specified network interface. 1286 * @param networkType the type of the network over which traffic to the 1287 * specified host is to be routed 1288 * @param hostAddress the IP address of the host to which the route is 1289 * desired 1290 * @return {@code true} on success, {@code false} on failure 1291 */ 1292 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1293 enforceChangePermission(); 1294 if (mProtectedNetworks.contains(networkType)) { 1295 enforceConnectivityInternalPermission(); 1296 } 1297 1298 InetAddress addr; 1299 try { 1300 addr = InetAddress.getByAddress(hostAddress); 1301 } catch (UnknownHostException e) { 1302 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1303 return false; 1304 } 1305 1306 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1307 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1308 return false; 1309 } 1310 1311 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1312 if (nai == null) { 1313 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1314 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1315 } else { 1316 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1317 } 1318 return false; 1319 } 1320 1321 DetailedState netState; 1322 synchronized (nai) { 1323 netState = nai.networkInfo.getDetailedState(); 1324 } 1325 1326 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1327 if (VDBG) { 1328 log("requestRouteToHostAddress on down network " 1329 + "(" + networkType + ") - dropped" 1330 + " netState=" + netState); 1331 } 1332 return false; 1333 } 1334 1335 final int uid = Binder.getCallingUid(); 1336 final long token = Binder.clearCallingIdentity(); 1337 try { 1338 LinkProperties lp; 1339 int netId; 1340 synchronized (nai) { 1341 lp = nai.linkProperties; 1342 netId = nai.network.netId; 1343 } 1344 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1345 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1346 return ok; 1347 } finally { 1348 Binder.restoreCallingIdentity(token); 1349 } 1350 } 1351 1352 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1353 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1354 if (bestRoute == null) { 1355 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1356 } else { 1357 String iface = bestRoute.getInterface(); 1358 if (bestRoute.getGateway().equals(addr)) { 1359 // if there is no better route, add the implied hostroute for our gateway 1360 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1361 } else { 1362 // if we will connect to this through another route, add a direct route 1363 // to it's gateway 1364 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1365 } 1366 } 1367 if (DBG) log("Adding legacy route " + bestRoute + 1368 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1369 try { 1370 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1371 } catch (Exception e) { 1372 // never crash - catch them all 1373 if (DBG) loge("Exception trying to add a route: " + e); 1374 return false; 1375 } 1376 return true; 1377 } 1378 1379 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1380 @Override 1381 public void onUidRulesChanged(int uid, int uidRules) { 1382 // caller is NPMS, since we only register with them 1383 if (LOGD_RULES) { 1384 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1385 } 1386 1387 synchronized (mRulesLock) { 1388 // skip update when we've already applied rules 1389 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1390 if (oldRules == uidRules) return; 1391 1392 mUidRules.put(uid, uidRules); 1393 } 1394 1395 // TODO: notify UID when it has requested targeted updates 1396 } 1397 1398 @Override 1399 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1400 // caller is NPMS, since we only register with them 1401 if (LOGD_RULES) { 1402 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1403 } 1404 1405 synchronized (mRulesLock) { 1406 mMeteredIfaces.clear(); 1407 for (String iface : meteredIfaces) { 1408 mMeteredIfaces.add(iface); 1409 } 1410 } 1411 } 1412 1413 @Override 1414 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1415 // caller is NPMS, since we only register with them 1416 if (LOGD_RULES) { 1417 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1418 } 1419 } 1420 }; 1421 1422 /** 1423 * Require that the caller is either in the same user or has appropriate permission to interact 1424 * across users. 1425 * 1426 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1427 */ 1428 private void enforceCrossUserPermission(int userId) { 1429 if (userId == UserHandle.getCallingUserId()) { 1430 // Not a cross-user call. 1431 return; 1432 } 1433 mContext.enforceCallingOrSelfPermission( 1434 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1435 "ConnectivityService"); 1436 } 1437 1438 private void enforceInternetPermission() { 1439 mContext.enforceCallingOrSelfPermission( 1440 android.Manifest.permission.INTERNET, 1441 "ConnectivityService"); 1442 } 1443 1444 private void enforceAccessPermission() { 1445 mContext.enforceCallingOrSelfPermission( 1446 android.Manifest.permission.ACCESS_NETWORK_STATE, 1447 "ConnectivityService"); 1448 } 1449 1450 private void enforceChangePermission() { 1451 ConnectivityManager.enforceChangePermission(mContext); 1452 } 1453 1454 private void enforceTetherAccessPermission() { 1455 mContext.enforceCallingOrSelfPermission( 1456 android.Manifest.permission.ACCESS_NETWORK_STATE, 1457 "ConnectivityService"); 1458 } 1459 1460 private void enforceConnectivityInternalPermission() { 1461 mContext.enforceCallingOrSelfPermission( 1462 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1463 "ConnectivityService"); 1464 } 1465 1466 private void enforceKeepalivePermission() { 1467 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1468 } 1469 1470 public void sendConnectedBroadcast(NetworkInfo info) { 1471 enforceConnectivityInternalPermission(); 1472 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1473 } 1474 1475 private void sendInetConditionBroadcast(NetworkInfo info) { 1476 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1477 } 1478 1479 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1480 if (mLockdownTracker != null) { 1481 info = mLockdownTracker.augmentNetworkInfo(info); 1482 } 1483 1484 Intent intent = new Intent(bcastType); 1485 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1486 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1487 if (info.isFailover()) { 1488 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1489 info.setFailover(false); 1490 } 1491 if (info.getReason() != null) { 1492 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1493 } 1494 if (info.getExtraInfo() != null) { 1495 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1496 info.getExtraInfo()); 1497 } 1498 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1499 return intent; 1500 } 1501 1502 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1503 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1504 } 1505 1506 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1507 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1508 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1509 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1510 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1511 final long ident = Binder.clearCallingIdentity(); 1512 try { 1513 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1514 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1515 } finally { 1516 Binder.restoreCallingIdentity(ident); 1517 } 1518 } 1519 1520 private void sendStickyBroadcast(Intent intent) { 1521 synchronized(this) { 1522 if (!mSystemReady) { 1523 mInitialBroadcast = new Intent(intent); 1524 } 1525 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1526 if (DBG) { 1527 log("sendStickyBroadcast: action=" + intent.getAction()); 1528 } 1529 1530 Bundle options = null; 1531 final long ident = Binder.clearCallingIdentity(); 1532 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1533 final NetworkInfo ni = intent.getParcelableExtra( 1534 ConnectivityManager.EXTRA_NETWORK_INFO); 1535 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1536 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1537 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1538 } else { 1539 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1540 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1541 options = opts.toBundle(); 1542 } 1543 final IBatteryStats bs = BatteryStatsService.getService(); 1544 try { 1545 bs.noteConnectivityChanged(intent.getIntExtra( 1546 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1547 ni != null ? ni.getState().toString() : "?"); 1548 } catch (RemoteException e) { 1549 } 1550 } 1551 try { 1552 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1553 } finally { 1554 Binder.restoreCallingIdentity(ident); 1555 } 1556 } 1557 } 1558 1559 void systemReady() { 1560 loadGlobalProxy(); 1561 1562 synchronized(this) { 1563 mSystemReady = true; 1564 if (mInitialBroadcast != null) { 1565 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1566 mInitialBroadcast = null; 1567 } 1568 } 1569 // load the global proxy at startup 1570 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1571 1572 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1573 // for user to unlock device too. 1574 updateLockdownVpn(); 1575 1576 // Configure whether mobile data is always on. 1577 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1578 1579 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1580 1581 mPermissionMonitor.startMonitoring(); 1582 } 1583 1584 /** 1585 * Setup data activity tracking for the given network. 1586 * 1587 * Every {@code setupDataActivityTracking} should be paired with a 1588 * {@link #removeDataActivityTracking} for cleanup. 1589 */ 1590 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1591 final String iface = networkAgent.linkProperties.getInterfaceName(); 1592 1593 final int timeout; 1594 int type = ConnectivityManager.TYPE_NONE; 1595 1596 if (networkAgent.networkCapabilities.hasTransport( 1597 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1598 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1599 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1600 10); 1601 type = ConnectivityManager.TYPE_MOBILE; 1602 } else if (networkAgent.networkCapabilities.hasTransport( 1603 NetworkCapabilities.TRANSPORT_WIFI)) { 1604 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1605 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1606 15); 1607 type = ConnectivityManager.TYPE_WIFI; 1608 } else { 1609 // do not track any other networks 1610 timeout = 0; 1611 } 1612 1613 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1614 try { 1615 mNetd.addIdleTimer(iface, timeout, type); 1616 } catch (Exception e) { 1617 // You shall not crash! 1618 loge("Exception in setupDataActivityTracking " + e); 1619 } 1620 } 1621 } 1622 1623 /** 1624 * Remove data activity tracking when network disconnects. 1625 */ 1626 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1627 final String iface = networkAgent.linkProperties.getInterfaceName(); 1628 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1629 1630 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1631 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1632 try { 1633 // the call fails silently if no idletimer setup for this interface 1634 mNetd.removeIdleTimer(iface); 1635 } catch (Exception e) { 1636 loge("Exception in removeDataActivityTracking " + e); 1637 } 1638 } 1639 } 1640 1641 /** 1642 * Reads the network specific MTU size from reources. 1643 * and set it on it's iface. 1644 */ 1645 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1646 final String iface = newLp.getInterfaceName(); 1647 final int mtu = newLp.getMtu(); 1648 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1649 if (VDBG) log("identical MTU - not setting"); 1650 return; 1651 } 1652 1653 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1654 loge("Unexpected mtu value: " + mtu + ", " + iface); 1655 return; 1656 } 1657 1658 // Cannot set MTU without interface name 1659 if (TextUtils.isEmpty(iface)) { 1660 loge("Setting MTU size with null iface."); 1661 return; 1662 } 1663 1664 try { 1665 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1666 mNetd.setMtu(iface, mtu); 1667 } catch (Exception e) { 1668 Slog.e(TAG, "exception in setMtu()" + e); 1669 } 1670 } 1671 1672 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1673 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1674 1675 // Overridden for testing purposes to avoid writing to SystemProperties. 1676 @VisibleForTesting 1677 protected int getDefaultTcpRwnd() { 1678 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1679 } 1680 1681 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1682 if (isDefaultNetwork(nai) == false) { 1683 return; 1684 } 1685 1686 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1687 String[] values = null; 1688 if (tcpBufferSizes != null) { 1689 values = tcpBufferSizes.split(","); 1690 } 1691 1692 if (values == null || values.length != 6) { 1693 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1694 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1695 values = tcpBufferSizes.split(","); 1696 } 1697 1698 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1699 1700 try { 1701 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1702 1703 final String prefix = "/sys/kernel/ipv4/tcp_"; 1704 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1705 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1706 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1707 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1708 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1709 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1710 mCurrentTcpBufferSizes = tcpBufferSizes; 1711 } catch (IOException e) { 1712 loge("Can't set TCP buffer sizes:" + e); 1713 } 1714 1715 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1716 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1717 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1718 if (rwndValue != 0) { 1719 SystemProperties.set(sysctlKey, rwndValue.toString()); 1720 } 1721 } 1722 1723 private void flushVmDnsCache() { 1724 /* 1725 * Tell the VMs to toss their DNS caches 1726 */ 1727 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1728 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1729 /* 1730 * Connectivity events can happen before boot has completed ... 1731 */ 1732 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1733 final long ident = Binder.clearCallingIdentity(); 1734 try { 1735 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1736 } finally { 1737 Binder.restoreCallingIdentity(ident); 1738 } 1739 } 1740 1741 @Override 1742 public int getRestoreDefaultNetworkDelay(int networkType) { 1743 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1744 NETWORK_RESTORE_DELAY_PROP_NAME); 1745 if(restoreDefaultNetworkDelayStr != null && 1746 restoreDefaultNetworkDelayStr.length() != 0) { 1747 try { 1748 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1749 } catch (NumberFormatException e) { 1750 } 1751 } 1752 // if the system property isn't set, use the value for the apn type 1753 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1754 1755 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1756 (mNetConfigs[networkType] != null)) { 1757 ret = mNetConfigs[networkType].restoreTime; 1758 } 1759 return ret; 1760 } 1761 1762 private boolean argsContain(String[] args, String target) { 1763 for (String arg : args) { 1764 if (arg.equals(target)) return true; 1765 } 1766 return false; 1767 } 1768 1769 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1770 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1771 final long DIAG_TIME_MS = 5000; 1772 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1773 // Start gathering diagnostic information. 1774 netDiags.add(new NetworkDiagnostics( 1775 nai.network, 1776 new LinkProperties(nai.linkProperties), // Must be a copy. 1777 DIAG_TIME_MS)); 1778 } 1779 1780 for (NetworkDiagnostics netDiag : netDiags) { 1781 pw.println(); 1782 netDiag.waitForMeasurements(); 1783 netDiag.dump(pw); 1784 } 1785 } 1786 1787 @Override 1788 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1789 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1790 if (mContext.checkCallingOrSelfPermission( 1791 android.Manifest.permission.DUMP) 1792 != PackageManager.PERMISSION_GRANTED) { 1793 pw.println("Permission Denial: can't dump ConnectivityService " + 1794 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1795 Binder.getCallingUid()); 1796 return; 1797 } 1798 1799 if (argsContain(args, "--diag")) { 1800 dumpNetworkDiagnostics(pw); 1801 return; 1802 } 1803 1804 pw.print("NetworkFactories for:"); 1805 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1806 pw.print(" " + nfi.name); 1807 } 1808 pw.println(); 1809 pw.println(); 1810 1811 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1812 pw.print("Active default network: "); 1813 if (defaultNai == null) { 1814 pw.println("none"); 1815 } else { 1816 pw.println(defaultNai.network.netId); 1817 } 1818 pw.println(); 1819 1820 pw.println("Current Networks:"); 1821 pw.increaseIndent(); 1822 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1823 pw.println(nai.toString()); 1824 pw.increaseIndent(); 1825 pw.println("Requests:"); 1826 pw.increaseIndent(); 1827 for (int i = 0; i < nai.networkRequests.size(); i++) { 1828 pw.println(nai.networkRequests.valueAt(i).toString()); 1829 } 1830 pw.decreaseIndent(); 1831 pw.println("Lingered:"); 1832 pw.increaseIndent(); 1833 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1834 pw.decreaseIndent(); 1835 pw.decreaseIndent(); 1836 } 1837 pw.decreaseIndent(); 1838 pw.println(); 1839 1840 pw.println("Network Requests:"); 1841 pw.increaseIndent(); 1842 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1843 pw.println(nri.toString()); 1844 } 1845 pw.println(); 1846 pw.decreaseIndent(); 1847 1848 mLegacyTypeTracker.dump(pw); 1849 1850 synchronized (this) { 1851 pw.print("mNetTransitionWakeLock: currently " + 1852 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1853 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1854 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1855 } else { 1856 pw.println(", last requested never"); 1857 } 1858 } 1859 1860 pw.println(); 1861 mTethering.dump(fd, pw, args); 1862 1863 pw.println(); 1864 mKeepaliveTracker.dump(pw); 1865 1866 pw.println(); 1867 1868 if (mInetLog != null && mInetLog.size() > 0) { 1869 pw.println(); 1870 pw.println("Inet condition reports:"); 1871 pw.increaseIndent(); 1872 for(int i = 0; i < mInetLog.size(); i++) { 1873 pw.println(mInetLog.get(i)); 1874 } 1875 pw.decreaseIndent(); 1876 } 1877 1878 if (argsContain(args, "--short") == false) { 1879 pw.println(); 1880 synchronized (mValidationLogs) { 1881 pw.println("mValidationLogs (most recent first):"); 1882 for (Pair<Network,ReadOnlyLocalLog> p : mValidationLogs) { 1883 pw.println(p.first); 1884 pw.increaseIndent(); 1885 p.second.dump(fd, pw, args); 1886 pw.decreaseIndent(); 1887 } 1888 } 1889 1890 pw.println(); 1891 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1892 pw.increaseIndent(); 1893 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1894 pw.decreaseIndent(); 1895 } 1896 } 1897 1898 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 1899 if (nai.network == null) return false; 1900 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1901 if (officialNai != null && officialNai.equals(nai)) return true; 1902 if (officialNai != null || VDBG) { 1903 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 1904 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1905 " - " + nai); 1906 } 1907 return false; 1908 } 1909 1910 private boolean isRequest(NetworkRequest request) { 1911 return mNetworkRequests.get(request).isRequest(); 1912 } 1913 1914 // must be stateless - things change under us. 1915 private class NetworkStateTrackerHandler extends Handler { 1916 public NetworkStateTrackerHandler(Looper looper) { 1917 super(looper); 1918 } 1919 1920 private boolean maybeHandleAsyncChannelMessage(Message msg) { 1921 switch (msg.what) { 1922 default: 1923 return false; 1924 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1925 handleAsyncChannelHalfConnect(msg); 1926 break; 1927 } 1928 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1929 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1930 if (nai != null) nai.asyncChannel.disconnect(); 1931 break; 1932 } 1933 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1934 handleAsyncChannelDisconnected(msg); 1935 break; 1936 } 1937 } 1938 return true; 1939 } 1940 1941 private void maybeHandleNetworkAgentMessage(Message msg) { 1942 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1943 if (nai == null) { 1944 if (VDBG) { 1945 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 1946 log(String.format("%s from unknown NetworkAgent", what)); 1947 } 1948 return; 1949 } 1950 1951 switch (msg.what) { 1952 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1953 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 1954 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 1955 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 1956 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 1957 } 1958 if (nai.created && !nai.networkCapabilities.equalImmutableCapabilities( 1959 networkCapabilities)) { 1960 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 1961 + nai.networkCapabilities + " -> " + networkCapabilities); 1962 } 1963 updateCapabilities(nai, networkCapabilities); 1964 break; 1965 } 1966 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1967 if (VDBG) { 1968 log("Update of LinkProperties for " + nai.name() + 1969 "; created=" + nai.created); 1970 } 1971 LinkProperties oldLp = nai.linkProperties; 1972 synchronized (nai) { 1973 nai.linkProperties = (LinkProperties)msg.obj; 1974 } 1975 if (nai.created) updateLinkProperties(nai, oldLp); 1976 break; 1977 } 1978 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1979 NetworkInfo info = (NetworkInfo) msg.obj; 1980 updateNetworkInfo(nai, info); 1981 break; 1982 } 1983 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1984 Integer score = (Integer) msg.obj; 1985 if (score != null) updateNetworkScore(nai, score.intValue()); 1986 break; 1987 } 1988 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 1989 try { 1990 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1991 } catch (Exception e) { 1992 // Never crash! 1993 loge("Exception in addVpnUidRanges: " + e); 1994 } 1995 break; 1996 } 1997 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 1998 try { 1999 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2000 } catch (Exception e) { 2001 // Never crash! 2002 loge("Exception in removeVpnUidRanges: " + e); 2003 } 2004 break; 2005 } 2006 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2007 if (nai.created && !nai.networkMisc.explicitlySelected) { 2008 loge("ERROR: created network explicitly selected."); 2009 } 2010 nai.networkMisc.explicitlySelected = true; 2011 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2012 break; 2013 } 2014 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2015 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2016 break; 2017 } 2018 } 2019 } 2020 2021 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2022 switch (msg.what) { 2023 default: 2024 return false; 2025 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2026 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2027 if (isLiveNetworkAgent(nai, msg.what)) { 2028 final boolean valid = 2029 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2030 if (DBG) log(nai.name() + " validation " + (valid ? " passed" : "failed")); 2031 if (valid != nai.lastValidated) { 2032 final int oldScore = nai.getCurrentScore(); 2033 nai.lastValidated = valid; 2034 nai.everValidated |= valid; 2035 updateCapabilities(nai, nai.networkCapabilities); 2036 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2037 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2038 } 2039 updateInetCondition(nai); 2040 // Let the NetworkAgent know the state of its network 2041 nai.asyncChannel.sendMessage( 2042 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2043 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2044 0, null); 2045 } 2046 break; 2047 } 2048 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 2049 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2050 if (isLiveNetworkAgent(nai, msg.what)) { 2051 handleLingerComplete(nai); 2052 } 2053 break; 2054 } 2055 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2056 final int netId = msg.arg2; 2057 final boolean visible = (msg.arg1 != 0); 2058 final NetworkAgentInfo nai; 2059 synchronized (mNetworkForNetId) { 2060 nai = mNetworkForNetId.get(netId); 2061 } 2062 // If captive portal status has changed, update capabilities. 2063 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2064 nai.lastCaptivePortalDetected = visible; 2065 nai.everCaptivePortalDetected |= visible; 2066 updateCapabilities(nai, nai.networkCapabilities); 2067 } 2068 if (!visible) { 2069 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2070 } else { 2071 if (nai == null) { 2072 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2073 break; 2074 } 2075 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2076 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2077 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2078 } 2079 break; 2080 } 2081 } 2082 return true; 2083 } 2084 2085 @Override 2086 public void handleMessage(Message msg) { 2087 if (!maybeHandleAsyncChannelMessage(msg) && !maybeHandleNetworkMonitorMessage(msg)) { 2088 maybeHandleNetworkAgentMessage(msg); 2089 } 2090 } 2091 } 2092 2093 private void linger(NetworkAgentInfo nai) { 2094 nai.lingering = true; 2095 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 2096 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 2097 } 2098 2099 // Cancel any lingering so the linger timeout doesn't teardown a network. 2100 // This should be called when a network begins satisfying a NetworkRequest. 2101 // Note: depending on what state the NetworkMonitor is in (e.g., 2102 // if it's awaiting captive portal login, or if validation failed), this 2103 // may trigger a re-evaluation of the network. 2104 private void unlinger(NetworkAgentInfo nai) { 2105 nai.networkLingered.clear(); 2106 if (!nai.lingering) return; 2107 nai.lingering = false; 2108 if (VDBG) log("Canceling linger of " + nai.name()); 2109 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2110 } 2111 2112 private void handleAsyncChannelHalfConnect(Message msg) { 2113 AsyncChannel ac = (AsyncChannel) msg.obj; 2114 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2115 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2116 if (VDBG) log("NetworkFactory connected"); 2117 // A network factory has connected. Send it all current NetworkRequests. 2118 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2119 if (!nri.isRequest()) continue; 2120 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2121 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2122 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2123 } 2124 } else { 2125 loge("Error connecting NetworkFactory"); 2126 mNetworkFactoryInfos.remove(msg.obj); 2127 } 2128 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2129 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2130 if (VDBG) log("NetworkAgent connected"); 2131 // A network agent has requested a connection. Establish the connection. 2132 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2133 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2134 } else { 2135 loge("Error connecting NetworkAgent"); 2136 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2137 if (nai != null) { 2138 final boolean wasDefault = isDefaultNetwork(nai); 2139 synchronized (mNetworkForNetId) { 2140 mNetworkForNetId.remove(nai.network.netId); 2141 mNetIdInUse.delete(nai.network.netId); 2142 } 2143 // Just in case. 2144 mLegacyTypeTracker.remove(nai, wasDefault); 2145 } 2146 } 2147 } 2148 } 2149 2150 private void handleAsyncChannelDisconnected(Message msg) { 2151 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2152 if (nai != null) { 2153 if (DBG) { 2154 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2155 } 2156 // A network agent has disconnected. 2157 // TODO - if we move the logic to the network agent (have them disconnect 2158 // because they lost all their requests or because their score isn't good) 2159 // then they would disconnect organically, report their new state and then 2160 // disconnect the channel. 2161 if (nai.networkInfo.isConnected()) { 2162 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2163 null, null); 2164 } 2165 final boolean wasDefault = isDefaultNetwork(nai); 2166 if (wasDefault) { 2167 mDefaultInetConditionPublished = 0; 2168 } 2169 notifyIfacesChangedForNetworkStats(); 2170 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2171 // by other networks that are already connected. Perhaps that can be done by 2172 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2173 // of rematchAllNetworksAndRequests 2174 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2175 mKeepaliveTracker.handleStopAllKeepalives(nai, 2176 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2177 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2178 mNetworkAgentInfos.remove(msg.replyTo); 2179 updateClat(null, nai.linkProperties, nai); 2180 synchronized (mNetworkForNetId) { 2181 // Remove the NetworkAgent, but don't mark the netId as 2182 // available until we've told netd to delete it below. 2183 mNetworkForNetId.remove(nai.network.netId); 2184 } 2185 // Remove all previously satisfied requests. 2186 for (int i = 0; i < nai.networkRequests.size(); i++) { 2187 NetworkRequest request = nai.networkRequests.valueAt(i); 2188 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2189 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2190 mNetworkForRequestId.remove(request.requestId); 2191 sendUpdatedScoreToFactories(request, 0); 2192 } 2193 } 2194 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2195 removeDataActivityTracking(nai); 2196 notifyLockdownVpn(nai); 2197 requestNetworkTransitionWakelock(nai.name()); 2198 } 2199 mLegacyTypeTracker.remove(nai, wasDefault); 2200 rematchAllNetworksAndRequests(null, 0); 2201 if (nai.created) { 2202 // Tell netd to clean up the configuration for this network 2203 // (routing rules, DNS, etc). 2204 // This may be slow as it requires a lot of netd shelling out to ip and 2205 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2206 // after we've rematched networks with requests which should make a potential 2207 // fallback network the default or requested a new network from the 2208 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2209 // long time. 2210 try { 2211 mNetd.removeNetwork(nai.network.netId); 2212 } catch (Exception e) { 2213 loge("Exception removing network: " + e); 2214 } 2215 } 2216 synchronized (mNetworkForNetId) { 2217 mNetIdInUse.delete(nai.network.netId); 2218 } 2219 } else { 2220 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2221 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2222 } 2223 } 2224 2225 // If this method proves to be too slow then we can maintain a separate 2226 // pendingIntent => NetworkRequestInfo map. 2227 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2228 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2229 Intent intent = pendingIntent.getIntent(); 2230 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2231 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2232 if (existingPendingIntent != null && 2233 existingPendingIntent.getIntent().filterEquals(intent)) { 2234 return entry.getValue(); 2235 } 2236 } 2237 return null; 2238 } 2239 2240 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2241 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2242 2243 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2244 if (existingRequest != null) { // remove the existing request. 2245 if (DBG) log("Replacing " + existingRequest.request + " with " 2246 + nri.request + " because their intents matched."); 2247 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2248 } 2249 handleRegisterNetworkRequest(nri); 2250 } 2251 2252 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2253 mNetworkRequests.put(nri.request, nri); 2254 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2255 if (!nri.isRequest()) { 2256 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2257 if (nri.request.networkCapabilities.hasSignalStrength() && 2258 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2259 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2260 } 2261 } 2262 } 2263 rematchAllNetworksAndRequests(null, 0); 2264 if (nri.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2265 sendUpdatedScoreToFactories(nri.request, 0); 2266 } 2267 } 2268 2269 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2270 int callingUid) { 2271 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2272 if (nri != null) { 2273 handleReleaseNetworkRequest(nri.request, callingUid); 2274 } 2275 } 2276 2277 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2278 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2279 // would it have a chance of satisfying any NetworkRequests. 2280 private boolean unneeded(NetworkAgentInfo nai) { 2281 if (!nai.created || nai.isVPN() || nai.lingering) return false; 2282 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2283 // If this Network is already the highest scoring Network for a request, or if 2284 // there is hope for it to become one if it validated, then it is needed. 2285 if (nri.isRequest() && nai.satisfies(nri.request) && 2286 (nai.networkRequests.get(nri.request.requestId) != null || 2287 // Note that this catches two important cases: 2288 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2289 // is currently satisfying the request. This is desirable when 2290 // cellular ends up validating but WiFi does not. 2291 // 2. Unvalidated WiFi will not be reaped when validated cellular 2292 // is currently satisfying the request. This is desirable when 2293 // WiFi ends up validating and out scoring cellular. 2294 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2295 nai.getCurrentScoreAsValidated())) { 2296 return false; 2297 } 2298 } 2299 return true; 2300 } 2301 2302 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2303 NetworkRequestInfo nri = mNetworkRequests.get(request); 2304 if (nri != null) { 2305 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2306 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2307 return; 2308 } 2309 if (DBG) log("releasing NetworkRequest " + request); 2310 nri.unlinkDeathRecipient(); 2311 mNetworkRequests.remove(request); 2312 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2313 if (nri.isRequest()) { 2314 // Find all networks that are satisfying this request and remove the request 2315 // from their request lists. 2316 // TODO - it's my understanding that for a request there is only a single 2317 // network satisfying it, so this loop is wasteful 2318 boolean wasKept = false; 2319 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2320 if (nai.networkRequests.get(nri.request.requestId) != null) { 2321 nai.networkRequests.remove(nri.request.requestId); 2322 if (DBG) { 2323 log(" Removing from current network " + nai.name() + 2324 ", leaving " + nai.networkRequests.size() + 2325 " requests."); 2326 } 2327 if (unneeded(nai)) { 2328 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2329 teardownUnneededNetwork(nai); 2330 } else { 2331 // suspect there should only be one pass through here 2332 // but if any were kept do the check below 2333 wasKept |= true; 2334 } 2335 } 2336 } 2337 2338 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2339 if (nai != null) { 2340 mNetworkForRequestId.remove(nri.request.requestId); 2341 } 2342 // Maintain the illusion. When this request arrived, we might have pretended 2343 // that a network connected to serve it, even though the network was already 2344 // connected. Now that this request has gone away, we might have to pretend 2345 // that the network disconnected. LegacyTypeTracker will generate that 2346 // phantom disconnect for this type. 2347 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2348 boolean doRemove = true; 2349 if (wasKept) { 2350 // check if any of the remaining requests for this network are for the 2351 // same legacy type - if so, don't remove the nai 2352 for (int i = 0; i < nai.networkRequests.size(); i++) { 2353 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2354 if (otherRequest.legacyType == nri.request.legacyType && 2355 isRequest(otherRequest)) { 2356 if (DBG) log(" still have other legacy request - leaving"); 2357 doRemove = false; 2358 } 2359 } 2360 } 2361 2362 if (doRemove) { 2363 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2364 } 2365 } 2366 2367 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2368 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2369 nri.request); 2370 } 2371 } else { 2372 // listens don't have a singular affectedNetwork. Check all networks to see 2373 // if this listen request applies and remove it. 2374 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2375 nai.networkRequests.remove(nri.request.requestId); 2376 if (nri.request.networkCapabilities.hasSignalStrength() && 2377 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2378 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2379 } 2380 } 2381 } 2382 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2383 } 2384 } 2385 2386 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2387 enforceConnectivityInternalPermission(); 2388 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2389 accept ? 1 : 0, always ? 1: 0, network)); 2390 } 2391 2392 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2393 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2394 " accept=" + accept + " always=" + always); 2395 2396 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2397 if (nai == null) { 2398 // Nothing to do. 2399 return; 2400 } 2401 2402 if (nai.everValidated) { 2403 // The network validated while the dialog box was up. Take no action. 2404 return; 2405 } 2406 2407 if (!nai.networkMisc.explicitlySelected) { 2408 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2409 } 2410 2411 if (accept != nai.networkMisc.acceptUnvalidated) { 2412 int oldScore = nai.getCurrentScore(); 2413 nai.networkMisc.acceptUnvalidated = accept; 2414 rematchAllNetworksAndRequests(nai, oldScore); 2415 sendUpdatedScoreToFactories(nai); 2416 } 2417 2418 if (always) { 2419 nai.asyncChannel.sendMessage( 2420 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2421 } 2422 2423 if (!accept) { 2424 // Tell the NetworkAgent to not automatically reconnect to the network. 2425 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2426 // Teardown the nework. 2427 teardownUnneededNetwork(nai); 2428 } 2429 2430 } 2431 2432 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2433 if (DBG) log("scheduleUnvalidatedPrompt " + nai.network); 2434 mHandler.sendMessageDelayed( 2435 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2436 PROMPT_UNVALIDATED_DELAY_MS); 2437 } 2438 2439 private void handlePromptUnvalidated(Network network) { 2440 if (DBG) log("handlePromptUnvalidated " + network); 2441 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2442 2443 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2444 // we haven't already been told to switch to it regardless of whether it validated or not. 2445 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2446 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2447 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2448 return; 2449 } 2450 2451 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2452 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2453 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2454 intent.setClassName("com.android.settings", 2455 "com.android.settings.wifi.WifiNoInternetDialog"); 2456 2457 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2458 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2459 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2460 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2461 } 2462 2463 private class InternalHandler extends Handler { 2464 public InternalHandler(Looper looper) { 2465 super(looper); 2466 } 2467 2468 @Override 2469 public void handleMessage(Message msg) { 2470 switch (msg.what) { 2471 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2472 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2473 String causedBy = null; 2474 synchronized (ConnectivityService.this) { 2475 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2476 mNetTransitionWakeLock.isHeld()) { 2477 mNetTransitionWakeLock.release(); 2478 causedBy = mNetTransitionWakeLockCausedBy; 2479 } else { 2480 break; 2481 } 2482 } 2483 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2484 log("Failed to find a new network - expiring NetTransition Wakelock"); 2485 } else { 2486 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2487 " cleared because we found a replacement network"); 2488 } 2489 break; 2490 } 2491 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2492 handleDeprecatedGlobalHttpProxy(); 2493 break; 2494 } 2495 case EVENT_PROXY_HAS_CHANGED: { 2496 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2497 break; 2498 } 2499 case EVENT_REGISTER_NETWORK_FACTORY: { 2500 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2501 break; 2502 } 2503 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2504 handleUnregisterNetworkFactory((Messenger)msg.obj); 2505 break; 2506 } 2507 case EVENT_REGISTER_NETWORK_AGENT: { 2508 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2509 break; 2510 } 2511 case EVENT_REGISTER_NETWORK_REQUEST: 2512 case EVENT_REGISTER_NETWORK_LISTENER: { 2513 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2514 break; 2515 } 2516 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2517 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2518 handleRegisterNetworkRequestWithIntent(msg); 2519 break; 2520 } 2521 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2522 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2523 break; 2524 } 2525 case EVENT_RELEASE_NETWORK_REQUEST: { 2526 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2527 break; 2528 } 2529 case EVENT_SET_ACCEPT_UNVALIDATED: { 2530 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2531 break; 2532 } 2533 case EVENT_PROMPT_UNVALIDATED: { 2534 handlePromptUnvalidated((Network) msg.obj); 2535 break; 2536 } 2537 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2538 handleMobileDataAlwaysOn(); 2539 break; 2540 } 2541 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2542 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2543 mKeepaliveTracker.handleStartKeepalive(msg); 2544 break; 2545 } 2546 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2547 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2548 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2549 int slot = msg.arg1; 2550 int reason = msg.arg2; 2551 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2552 break; 2553 } 2554 case EVENT_SYSTEM_READY: { 2555 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2556 nai.networkMonitor.systemReady = true; 2557 } 2558 break; 2559 } 2560 } 2561 } 2562 } 2563 2564 // javadoc from interface 2565 public int tether(String iface) { 2566 ConnectivityManager.enforceTetherChangePermission(mContext); 2567 if (isTetheringSupported()) { 2568 return mTethering.tether(iface); 2569 } else { 2570 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2571 } 2572 } 2573 2574 // javadoc from interface 2575 public int untether(String iface) { 2576 ConnectivityManager.enforceTetherChangePermission(mContext); 2577 2578 if (isTetheringSupported()) { 2579 return mTethering.untether(iface); 2580 } else { 2581 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2582 } 2583 } 2584 2585 // javadoc from interface 2586 public int getLastTetherError(String iface) { 2587 enforceTetherAccessPermission(); 2588 2589 if (isTetheringSupported()) { 2590 return mTethering.getLastTetherError(iface); 2591 } else { 2592 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2593 } 2594 } 2595 2596 // TODO - proper iface API for selection by property, inspection, etc 2597 public String[] getTetherableUsbRegexs() { 2598 enforceTetherAccessPermission(); 2599 if (isTetheringSupported()) { 2600 return mTethering.getTetherableUsbRegexs(); 2601 } else { 2602 return new String[0]; 2603 } 2604 } 2605 2606 public String[] getTetherableWifiRegexs() { 2607 enforceTetherAccessPermission(); 2608 if (isTetheringSupported()) { 2609 return mTethering.getTetherableWifiRegexs(); 2610 } else { 2611 return new String[0]; 2612 } 2613 } 2614 2615 public String[] getTetherableBluetoothRegexs() { 2616 enforceTetherAccessPermission(); 2617 if (isTetheringSupported()) { 2618 return mTethering.getTetherableBluetoothRegexs(); 2619 } else { 2620 return new String[0]; 2621 } 2622 } 2623 2624 public int setUsbTethering(boolean enable) { 2625 ConnectivityManager.enforceTetherChangePermission(mContext); 2626 if (isTetheringSupported()) { 2627 return mTethering.setUsbTethering(enable); 2628 } else { 2629 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2630 } 2631 } 2632 2633 // TODO - move iface listing, queries, etc to new module 2634 // javadoc from interface 2635 public String[] getTetherableIfaces() { 2636 enforceTetherAccessPermission(); 2637 return mTethering.getTetherableIfaces(); 2638 } 2639 2640 public String[] getTetheredIfaces() { 2641 enforceTetherAccessPermission(); 2642 return mTethering.getTetheredIfaces(); 2643 } 2644 2645 public String[] getTetheringErroredIfaces() { 2646 enforceTetherAccessPermission(); 2647 return mTethering.getErroredIfaces(); 2648 } 2649 2650 public String[] getTetheredDhcpRanges() { 2651 enforceConnectivityInternalPermission(); 2652 return mTethering.getTetheredDhcpRanges(); 2653 } 2654 2655 // if ro.tether.denied = true we default to no tethering 2656 // gservices could set the secure setting to 1 though to enable it on a build where it 2657 // had previously been turned off. 2658 @Override 2659 public boolean isTetheringSupported() { 2660 enforceTetherAccessPermission(); 2661 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2662 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2663 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2664 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2665 return tetherEnabledInSettings && mUserManager.isAdminUser() && 2666 ((mTethering.getTetherableUsbRegexs().length != 0 || 2667 mTethering.getTetherableWifiRegexs().length != 0 || 2668 mTethering.getTetherableBluetoothRegexs().length != 0) && 2669 mTethering.getUpstreamIfaceTypes().length != 0); 2670 } 2671 2672 @Override 2673 public void startTethering(int type, ResultReceiver receiver, 2674 boolean showProvisioningUi) { 2675 ConnectivityManager.enforceTetherChangePermission(mContext); 2676 if (!isTetheringSupported()) { 2677 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 2678 return; 2679 } 2680 mTethering.startTethering(type, receiver, showProvisioningUi); 2681 } 2682 2683 @Override 2684 public void stopTethering(int type) { 2685 ConnectivityManager.enforceTetherChangePermission(mContext); 2686 mTethering.stopTethering(type); 2687 } 2688 2689 // Called when we lose the default network and have no replacement yet. 2690 // This will automatically be cleared after X seconds or a new default network 2691 // becomes CONNECTED, whichever happens first. The timer is started by the 2692 // first caller and not restarted by subsequent callers. 2693 private void requestNetworkTransitionWakelock(String forWhom) { 2694 int serialNum = 0; 2695 synchronized (this) { 2696 if (mNetTransitionWakeLock.isHeld()) return; 2697 serialNum = ++mNetTransitionWakeLockSerialNumber; 2698 mNetTransitionWakeLock.acquire(); 2699 mNetTransitionWakeLockCausedBy = forWhom; 2700 } 2701 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2702 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2703 mNetTransitionWakeLockTimeout); 2704 return; 2705 } 2706 2707 // 100 percent is full good, 0 is full bad. 2708 public void reportInetCondition(int networkType, int percentage) { 2709 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2710 if (nai == null) return; 2711 reportNetworkConnectivity(nai.network, percentage > 50); 2712 } 2713 2714 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2715 enforceAccessPermission(); 2716 enforceInternetPermission(); 2717 2718 NetworkAgentInfo nai; 2719 if (network == null) { 2720 nai = getDefaultNetwork(); 2721 } else { 2722 nai = getNetworkAgentInfoForNetwork(network); 2723 } 2724 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2725 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2726 return; 2727 } 2728 // Revalidate if the app report does not match our current validated state. 2729 if (hasConnectivity == nai.lastValidated) return; 2730 final int uid = Binder.getCallingUid(); 2731 if (DBG) { 2732 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2733 ") by " + uid); 2734 } 2735 synchronized (nai) { 2736 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2737 // which isn't meant to work on uncreated networks. 2738 if (!nai.created) return; 2739 2740 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2741 2742 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2743 } 2744 } 2745 2746 private ProxyInfo getDefaultProxy() { 2747 // this information is already available as a world read/writable jvm property 2748 // so this API change wouldn't have a benifit. It also breaks the passing 2749 // of proxy info to all the JVMs. 2750 // enforceAccessPermission(); 2751 synchronized (mProxyLock) { 2752 ProxyInfo ret = mGlobalProxy; 2753 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2754 return ret; 2755 } 2756 } 2757 2758 public ProxyInfo getProxyForNetwork(Network network) { 2759 if (network == null) return getDefaultProxy(); 2760 final ProxyInfo globalProxy = getGlobalProxy(); 2761 if (globalProxy != null) return globalProxy; 2762 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 2763 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 2764 // caller may not have. 2765 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2766 if (nai == null) return null; 2767 synchronized (nai) { 2768 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 2769 if (proxyInfo == null) return null; 2770 return new ProxyInfo(proxyInfo); 2771 } 2772 } 2773 2774 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2775 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2776 // proxy is null then there is no proxy in place). 2777 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2778 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2779 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2780 proxy = null; 2781 } 2782 return proxy; 2783 } 2784 2785 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2786 // better for determining if a new proxy broadcast is necessary: 2787 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2788 // avoid unnecessary broadcasts. 2789 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2790 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2791 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2792 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2793 // all set. 2794 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2795 a = canonicalizeProxyInfo(a); 2796 b = canonicalizeProxyInfo(b); 2797 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2798 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2799 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2800 } 2801 2802 public void setGlobalProxy(ProxyInfo proxyProperties) { 2803 enforceConnectivityInternalPermission(); 2804 2805 synchronized (mProxyLock) { 2806 if (proxyProperties == mGlobalProxy) return; 2807 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2808 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2809 2810 String host = ""; 2811 int port = 0; 2812 String exclList = ""; 2813 String pacFileUrl = ""; 2814 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2815 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2816 if (!proxyProperties.isValid()) { 2817 if (DBG) 2818 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2819 return; 2820 } 2821 mGlobalProxy = new ProxyInfo(proxyProperties); 2822 host = mGlobalProxy.getHost(); 2823 port = mGlobalProxy.getPort(); 2824 exclList = mGlobalProxy.getExclusionListAsString(); 2825 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2826 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2827 } 2828 } else { 2829 mGlobalProxy = null; 2830 } 2831 ContentResolver res = mContext.getContentResolver(); 2832 final long token = Binder.clearCallingIdentity(); 2833 try { 2834 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2835 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2836 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2837 exclList); 2838 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2839 } finally { 2840 Binder.restoreCallingIdentity(token); 2841 } 2842 2843 if (mGlobalProxy == null) { 2844 proxyProperties = mDefaultProxy; 2845 } 2846 sendProxyBroadcast(proxyProperties); 2847 } 2848 } 2849 2850 private void loadGlobalProxy() { 2851 ContentResolver res = mContext.getContentResolver(); 2852 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2853 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2854 String exclList = Settings.Global.getString(res, 2855 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2856 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2857 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2858 ProxyInfo proxyProperties; 2859 if (!TextUtils.isEmpty(pacFileUrl)) { 2860 proxyProperties = new ProxyInfo(pacFileUrl); 2861 } else { 2862 proxyProperties = new ProxyInfo(host, port, exclList); 2863 } 2864 if (!proxyProperties.isValid()) { 2865 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2866 return; 2867 } 2868 2869 synchronized (mProxyLock) { 2870 mGlobalProxy = proxyProperties; 2871 } 2872 } 2873 } 2874 2875 public ProxyInfo getGlobalProxy() { 2876 // this information is already available as a world read/writable jvm property 2877 // so this API change wouldn't have a benifit. It also breaks the passing 2878 // of proxy info to all the JVMs. 2879 // enforceAccessPermission(); 2880 synchronized (mProxyLock) { 2881 return mGlobalProxy; 2882 } 2883 } 2884 2885 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2886 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2887 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2888 proxy = null; 2889 } 2890 synchronized (mProxyLock) { 2891 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2892 if (mDefaultProxy == proxy) return; // catches repeated nulls 2893 if (proxy != null && !proxy.isValid()) { 2894 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2895 return; 2896 } 2897 2898 // This call could be coming from the PacManager, containing the port of the local 2899 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2900 // global (to get the correct local port), and send a broadcast. 2901 // TODO: Switch PacManager to have its own message to send back rather than 2902 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2903 if ((mGlobalProxy != null) && (proxy != null) 2904 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2905 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2906 mGlobalProxy = proxy; 2907 sendProxyBroadcast(mGlobalProxy); 2908 return; 2909 } 2910 mDefaultProxy = proxy; 2911 2912 if (mGlobalProxy != null) return; 2913 if (!mDefaultProxyDisabled) { 2914 sendProxyBroadcast(proxy); 2915 } 2916 } 2917 } 2918 2919 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2920 // This method gets called when any network changes proxy, but the broadcast only ever contains 2921 // the default proxy (even if it hasn't changed). 2922 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2923 // world where an app might be bound to a non-default network. 2924 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2925 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2926 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2927 2928 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2929 sendProxyBroadcast(getDefaultProxy()); 2930 } 2931 } 2932 2933 private void handleDeprecatedGlobalHttpProxy() { 2934 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2935 Settings.Global.HTTP_PROXY); 2936 if (!TextUtils.isEmpty(proxy)) { 2937 String data[] = proxy.split(":"); 2938 if (data.length == 0) { 2939 return; 2940 } 2941 2942 String proxyHost = data[0]; 2943 int proxyPort = 8080; 2944 if (data.length > 1) { 2945 try { 2946 proxyPort = Integer.parseInt(data[1]); 2947 } catch (NumberFormatException e) { 2948 return; 2949 } 2950 } 2951 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2952 setGlobalProxy(p); 2953 } 2954 } 2955 2956 private void sendProxyBroadcast(ProxyInfo proxy) { 2957 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2958 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2959 if (DBG) log("sending Proxy Broadcast for " + proxy); 2960 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2961 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2962 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2963 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2964 final long ident = Binder.clearCallingIdentity(); 2965 try { 2966 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2967 } finally { 2968 Binder.restoreCallingIdentity(ident); 2969 } 2970 } 2971 2972 private static class SettingsObserver extends ContentObserver { 2973 final private HashMap<Uri, Integer> mUriEventMap; 2974 final private Context mContext; 2975 final private Handler mHandler; 2976 2977 SettingsObserver(Context context, Handler handler) { 2978 super(null); 2979 mUriEventMap = new HashMap<Uri, Integer>(); 2980 mContext = context; 2981 mHandler = handler; 2982 } 2983 2984 void observe(Uri uri, int what) { 2985 mUriEventMap.put(uri, what); 2986 final ContentResolver resolver = mContext.getContentResolver(); 2987 resolver.registerContentObserver(uri, false, this); 2988 } 2989 2990 @Override 2991 public void onChange(boolean selfChange) { 2992 Slog.wtf(TAG, "Should never be reached."); 2993 } 2994 2995 @Override 2996 public void onChange(boolean selfChange, Uri uri) { 2997 final Integer what = mUriEventMap.get(uri); 2998 if (what != null) { 2999 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3000 } else { 3001 loge("No matching event to send for URI=" + uri); 3002 } 3003 } 3004 } 3005 3006 private static void log(String s) { 3007 Slog.d(TAG, s); 3008 } 3009 3010 private static void loge(String s) { 3011 Slog.e(TAG, s); 3012 } 3013 3014 private static <T> T checkNotNull(T value, String message) { 3015 if (value == null) { 3016 throw new NullPointerException(message); 3017 } 3018 return value; 3019 } 3020 3021 /** 3022 * Prepare for a VPN application. 3023 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3024 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3025 * 3026 * @param oldPackage Package name of the application which currently controls VPN, which will 3027 * be replaced. If there is no such application, this should should either be 3028 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3029 * @param newPackage Package name of the application which should gain control of VPN, or 3030 * {@code null} to disable. 3031 * @param userId User for whom to prepare the new VPN. 3032 * 3033 * @hide 3034 */ 3035 @Override 3036 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3037 int userId) { 3038 enforceCrossUserPermission(userId); 3039 throwIfLockdownEnabled(); 3040 3041 synchronized(mVpns) { 3042 Vpn vpn = mVpns.get(userId); 3043 if (vpn != null) { 3044 return vpn.prepare(oldPackage, newPackage); 3045 } else { 3046 return false; 3047 } 3048 } 3049 } 3050 3051 /** 3052 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3053 * This method is used by system-privileged apps. 3054 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3055 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3056 * 3057 * @param packageName The package for which authorization state should change. 3058 * @param userId User for whom {@code packageName} is installed. 3059 * @param authorized {@code true} if this app should be able to start a VPN connection without 3060 * explicit user approval, {@code false} if not. 3061 * 3062 * @hide 3063 */ 3064 @Override 3065 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3066 enforceCrossUserPermission(userId); 3067 3068 synchronized(mVpns) { 3069 Vpn vpn = mVpns.get(userId); 3070 if (vpn != null) { 3071 vpn.setPackageAuthorization(packageName, authorized); 3072 } 3073 } 3074 } 3075 3076 /** 3077 * Configure a TUN interface and return its file descriptor. Parameters 3078 * are encoded and opaque to this class. This method is used by VpnBuilder 3079 * and not available in ConnectivityManager. Permissions are checked in 3080 * Vpn class. 3081 * @hide 3082 */ 3083 @Override 3084 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3085 throwIfLockdownEnabled(); 3086 int user = UserHandle.getUserId(Binder.getCallingUid()); 3087 synchronized(mVpns) { 3088 return mVpns.get(user).establish(config); 3089 } 3090 } 3091 3092 /** 3093 * Start legacy VPN, controlling native daemons as needed. Creates a 3094 * secondary thread to perform connection work, returning quickly. 3095 */ 3096 @Override 3097 public void startLegacyVpn(VpnProfile profile) { 3098 throwIfLockdownEnabled(); 3099 final LinkProperties egress = getActiveLinkProperties(); 3100 if (egress == null) { 3101 throw new IllegalStateException("Missing active network connection"); 3102 } 3103 int user = UserHandle.getUserId(Binder.getCallingUid()); 3104 synchronized(mVpns) { 3105 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3106 } 3107 } 3108 3109 /** 3110 * Return the information of the ongoing legacy VPN. This method is used 3111 * by VpnSettings and not available in ConnectivityManager. Permissions 3112 * are checked in Vpn class. 3113 */ 3114 @Override 3115 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3116 enforceCrossUserPermission(userId); 3117 if (mLockdownEnabled) { 3118 return null; 3119 } 3120 3121 synchronized(mVpns) { 3122 return mVpns.get(userId).getLegacyVpnInfo(); 3123 } 3124 } 3125 3126 /** 3127 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3128 * and not available in ConnectivityManager. 3129 */ 3130 @Override 3131 public VpnInfo[] getAllVpnInfo() { 3132 enforceConnectivityInternalPermission(); 3133 if (mLockdownEnabled) { 3134 return new VpnInfo[0]; 3135 } 3136 3137 synchronized(mVpns) { 3138 List<VpnInfo> infoList = new ArrayList<>(); 3139 for (int i = 0; i < mVpns.size(); i++) { 3140 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3141 if (info != null) { 3142 infoList.add(info); 3143 } 3144 } 3145 return infoList.toArray(new VpnInfo[infoList.size()]); 3146 } 3147 } 3148 3149 /** 3150 * @return VPN information for accounting, or null if we can't retrieve all required 3151 * information, e.g primary underlying iface. 3152 */ 3153 @Nullable 3154 private VpnInfo createVpnInfo(Vpn vpn) { 3155 VpnInfo info = vpn.getVpnInfo(); 3156 if (info == null) { 3157 return null; 3158 } 3159 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3160 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3161 // the underlyingNetworks list. 3162 if (underlyingNetworks == null) { 3163 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3164 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3165 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3166 } 3167 } else if (underlyingNetworks.length > 0) { 3168 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3169 if (linkProperties != null) { 3170 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3171 } 3172 } 3173 return info.primaryUnderlyingIface == null ? null : info; 3174 } 3175 3176 /** 3177 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3178 * VpnDialogs and not available in ConnectivityManager. 3179 * Permissions are checked in Vpn class. 3180 * @hide 3181 */ 3182 @Override 3183 public VpnConfig getVpnConfig(int userId) { 3184 enforceCrossUserPermission(userId); 3185 synchronized(mVpns) { 3186 Vpn vpn = mVpns.get(userId); 3187 if (vpn != null) { 3188 return vpn.getVpnConfig(); 3189 } else { 3190 return null; 3191 } 3192 } 3193 } 3194 3195 @Override 3196 public boolean updateLockdownVpn() { 3197 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3198 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3199 return false; 3200 } 3201 3202 // Tear down existing lockdown if profile was removed 3203 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3204 if (mLockdownEnabled) { 3205 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3206 final VpnProfile profile = VpnProfile.decode( 3207 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3208 if (profile == null) { 3209 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3210 setLockdownTracker(null); 3211 return true; 3212 } 3213 int user = UserHandle.getUserId(Binder.getCallingUid()); 3214 synchronized(mVpns) { 3215 Vpn vpn = mVpns.get(user); 3216 if (vpn == null) { 3217 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3218 return false; 3219 } 3220 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3221 } 3222 } else { 3223 setLockdownTracker(null); 3224 } 3225 3226 return true; 3227 } 3228 3229 /** 3230 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3231 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3232 */ 3233 private void setLockdownTracker(LockdownVpnTracker tracker) { 3234 // Shutdown any existing tracker 3235 final LockdownVpnTracker existing = mLockdownTracker; 3236 mLockdownTracker = null; 3237 if (existing != null) { 3238 existing.shutdown(); 3239 } 3240 3241 try { 3242 if (tracker != null) { 3243 mNetd.setFirewallEnabled(true); 3244 mNetd.setFirewallInterfaceRule("lo", true); 3245 mLockdownTracker = tracker; 3246 mLockdownTracker.init(); 3247 } else { 3248 mNetd.setFirewallEnabled(false); 3249 } 3250 } catch (RemoteException e) { 3251 // ignored; NMS lives inside system_server 3252 } 3253 } 3254 3255 private void throwIfLockdownEnabled() { 3256 if (mLockdownEnabled) { 3257 throw new IllegalStateException("Unavailable in lockdown mode"); 3258 } 3259 } 3260 3261 /** 3262 * Sets up or tears down the always-on VPN for user {@param user} as appropriate. 3263 * 3264 * @return {@code false} in case of errors; {@code true} otherwise. 3265 */ 3266 private boolean updateAlwaysOnVpn(int user) { 3267 final String lockdownPackage = getAlwaysOnVpnPackage(user); 3268 if (lockdownPackage == null) { 3269 return true; 3270 } 3271 3272 // Create an intent to start the VPN service declared in the app's manifest. 3273 Intent serviceIntent = new Intent(VpnConfig.SERVICE_INTERFACE); 3274 serviceIntent.setPackage(lockdownPackage); 3275 3276 try { 3277 return mContext.startServiceAsUser(serviceIntent, UserHandle.of(user)) != null; 3278 } catch (RuntimeException e) { 3279 return false; 3280 } 3281 } 3282 3283 @Override 3284 public boolean setAlwaysOnVpnPackage(int userId, String packageName) { 3285 enforceConnectivityInternalPermission(); 3286 enforceCrossUserPermission(userId); 3287 3288 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3289 if (LockdownVpnTracker.isEnabled()) { 3290 return false; 3291 } 3292 3293 // If the current VPN package is the same as the new one, this is a no-op 3294 final String oldPackage = getAlwaysOnVpnPackage(userId); 3295 if (TextUtils.equals(oldPackage, packageName)) { 3296 return true; 3297 } 3298 3299 synchronized (mVpns) { 3300 Vpn vpn = mVpns.get(userId); 3301 if (vpn == null) { 3302 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3303 return false; 3304 } 3305 if (!vpn.setAlwaysOnPackage(packageName)) { 3306 return false; 3307 } 3308 if (!updateAlwaysOnVpn(userId)) { 3309 vpn.setAlwaysOnPackage(null); 3310 return false; 3311 } 3312 } 3313 return true; 3314 } 3315 3316 @Override 3317 public String getAlwaysOnVpnPackage(int userId) { 3318 enforceConnectivityInternalPermission(); 3319 enforceCrossUserPermission(userId); 3320 3321 synchronized (mVpns) { 3322 Vpn vpn = mVpns.get(userId); 3323 if (vpn == null) { 3324 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3325 return null; 3326 } 3327 return vpn.getAlwaysOnPackage(); 3328 } 3329 } 3330 3331 @Override 3332 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3333 // TODO: Remove? Any reason to trigger a provisioning check? 3334 return -1; 3335 } 3336 3337 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3338 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3339 3340 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3341 if (DBG) { 3342 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3343 + " action=" + action); 3344 } 3345 Intent intent = new Intent(action); 3346 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3347 // Concatenate the range of types onto the range of NetIDs. 3348 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3349 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3350 networkType, null, pendingIntent, false); 3351 } 3352 3353 /** 3354 * Show or hide network provisioning notifications. 3355 * 3356 * We use notifications for two purposes: to notify that a network requires sign in 3357 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3358 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3359 * particular network we can display the notification type that was most recently requested. 3360 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3361 * might first display NO_INTERNET, and then when the captive portal check completes, display 3362 * SIGN_IN. 3363 * 3364 * @param id an identifier that uniquely identifies this notification. This must match 3365 * between show and hide calls. We use the NetID value but for legacy callers 3366 * we concatenate the range of types with the range of NetIDs. 3367 */ 3368 private void setProvNotificationVisibleIntent(boolean visible, int id, 3369 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3370 boolean highPriority) { 3371 if (DBG) { 3372 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3373 + " networkType=" + getNetworkTypeName(networkType) 3374 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3375 } 3376 3377 Resources r = Resources.getSystem(); 3378 NotificationManager notificationManager = (NotificationManager) mContext 3379 .getSystemService(Context.NOTIFICATION_SERVICE); 3380 3381 if (visible) { 3382 CharSequence title; 3383 CharSequence details; 3384 int icon; 3385 if (notifyType == NotificationType.NO_INTERNET && 3386 networkType == ConnectivityManager.TYPE_WIFI) { 3387 title = r.getString(R.string.wifi_no_internet, 0); 3388 details = r.getString(R.string.wifi_no_internet_detailed); 3389 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3390 } else if (notifyType == NotificationType.SIGN_IN) { 3391 switch (networkType) { 3392 case ConnectivityManager.TYPE_WIFI: 3393 title = r.getString(R.string.wifi_available_sign_in, 0); 3394 details = r.getString(R.string.network_available_sign_in_detailed, 3395 extraInfo); 3396 icon = R.drawable.stat_notify_wifi_in_range; 3397 break; 3398 case ConnectivityManager.TYPE_MOBILE: 3399 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3400 title = r.getString(R.string.network_available_sign_in, 0); 3401 // TODO: Change this to pull from NetworkInfo once a printable 3402 // name has been added to it 3403 details = mTelephonyManager.getNetworkOperatorName(); 3404 icon = R.drawable.stat_notify_rssi_in_range; 3405 break; 3406 default: 3407 title = r.getString(R.string.network_available_sign_in, 0); 3408 details = r.getString(R.string.network_available_sign_in_detailed, 3409 extraInfo); 3410 icon = R.drawable.stat_notify_rssi_in_range; 3411 break; 3412 } 3413 } else { 3414 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3415 + getNetworkTypeName(networkType)); 3416 return; 3417 } 3418 3419 Notification notification = new Notification.Builder(mContext) 3420 .setWhen(0) 3421 .setSmallIcon(icon) 3422 .setAutoCancel(true) 3423 .setTicker(title) 3424 .setColor(mContext.getColor( 3425 com.android.internal.R.color.system_notification_accent_color)) 3426 .setContentTitle(title) 3427 .setContentText(details) 3428 .setContentIntent(intent) 3429 .setLocalOnly(true) 3430 .setPriority(highPriority ? 3431 Notification.PRIORITY_HIGH : 3432 Notification.PRIORITY_DEFAULT) 3433 .setDefaults(highPriority ? Notification.DEFAULT_ALL : 0) 3434 .setOnlyAlertOnce(true) 3435 .build(); 3436 3437 try { 3438 notificationManager.notify(NOTIFICATION_ID, id, notification); 3439 } catch (NullPointerException npe) { 3440 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3441 npe.printStackTrace(); 3442 } 3443 } else { 3444 try { 3445 notificationManager.cancel(NOTIFICATION_ID, id); 3446 } catch (NullPointerException npe) { 3447 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3448 npe.printStackTrace(); 3449 } 3450 } 3451 } 3452 3453 /** Location to an updatable file listing carrier provisioning urls. 3454 * An example: 3455 * 3456 * <?xml version="1.0" encoding="utf-8"?> 3457 * <provisioningUrls> 3458 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3459 * </provisioningUrls> 3460 */ 3461 private static final String PROVISIONING_URL_PATH = 3462 "/data/misc/radio/provisioning_urls.xml"; 3463 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3464 3465 /** XML tag for root element. */ 3466 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3467 /** XML tag for individual url */ 3468 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3469 /** XML attribute for mcc */ 3470 private static final String ATTR_MCC = "mcc"; 3471 /** XML attribute for mnc */ 3472 private static final String ATTR_MNC = "mnc"; 3473 3474 private String getProvisioningUrlBaseFromFile() { 3475 FileReader fileReader = null; 3476 XmlPullParser parser = null; 3477 Configuration config = mContext.getResources().getConfiguration(); 3478 3479 try { 3480 fileReader = new FileReader(mProvisioningUrlFile); 3481 parser = Xml.newPullParser(); 3482 parser.setInput(fileReader); 3483 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3484 3485 while (true) { 3486 XmlUtils.nextElement(parser); 3487 3488 String element = parser.getName(); 3489 if (element == null) break; 3490 3491 if (element.equals(TAG_PROVISIONING_URL)) { 3492 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3493 try { 3494 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3495 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3496 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3497 parser.next(); 3498 if (parser.getEventType() == XmlPullParser.TEXT) { 3499 return parser.getText(); 3500 } 3501 } 3502 } 3503 } catch (NumberFormatException e) { 3504 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3505 } 3506 } 3507 } 3508 return null; 3509 } catch (FileNotFoundException e) { 3510 loge("Carrier Provisioning Urls file not found"); 3511 } catch (XmlPullParserException e) { 3512 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3513 } catch (IOException e) { 3514 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3515 } finally { 3516 if (fileReader != null) { 3517 try { 3518 fileReader.close(); 3519 } catch (IOException e) {} 3520 } 3521 } 3522 return null; 3523 } 3524 3525 @Override 3526 public String getMobileProvisioningUrl() { 3527 enforceConnectivityInternalPermission(); 3528 String url = getProvisioningUrlBaseFromFile(); 3529 if (TextUtils.isEmpty(url)) { 3530 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3531 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3532 } else { 3533 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3534 } 3535 // populate the iccid, imei and phone number in the provisioning url. 3536 if (!TextUtils.isEmpty(url)) { 3537 String phoneNumber = mTelephonyManager.getLine1Number(); 3538 if (TextUtils.isEmpty(phoneNumber)) { 3539 phoneNumber = "0000000000"; 3540 } 3541 url = String.format(url, 3542 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3543 mTelephonyManager.getDeviceId() /* IMEI */, 3544 phoneNumber /* Phone numer */); 3545 } 3546 3547 return url; 3548 } 3549 3550 @Override 3551 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3552 String action) { 3553 enforceConnectivityInternalPermission(); 3554 final long ident = Binder.clearCallingIdentity(); 3555 try { 3556 setProvNotificationVisible(visible, networkType, action); 3557 } finally { 3558 Binder.restoreCallingIdentity(ident); 3559 } 3560 } 3561 3562 @Override 3563 public void setAirplaneMode(boolean enable) { 3564 enforceConnectivityInternalPermission(); 3565 final long ident = Binder.clearCallingIdentity(); 3566 try { 3567 final ContentResolver cr = mContext.getContentResolver(); 3568 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3569 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3570 intent.putExtra("state", enable); 3571 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3572 } finally { 3573 Binder.restoreCallingIdentity(ident); 3574 } 3575 } 3576 3577 private void onUserStart(int userId) { 3578 synchronized(mVpns) { 3579 Vpn userVpn = mVpns.get(userId); 3580 if (userVpn != null) { 3581 loge("Starting user already has a VPN"); 3582 return; 3583 } 3584 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3585 mVpns.put(userId, userVpn); 3586 } 3587 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3588 updateLockdownVpn(); 3589 } else { 3590 updateAlwaysOnVpn(userId); 3591 } 3592 } 3593 3594 private void onUserStop(int userId) { 3595 synchronized(mVpns) { 3596 Vpn userVpn = mVpns.get(userId); 3597 if (userVpn == null) { 3598 loge("Stopping user has no VPN"); 3599 return; 3600 } 3601 mVpns.delete(userId); 3602 } 3603 } 3604 3605 private void onUserAdded(int userId) { 3606 synchronized(mVpns) { 3607 final int vpnsSize = mVpns.size(); 3608 for (int i = 0; i < vpnsSize; i++) { 3609 Vpn vpn = mVpns.valueAt(i); 3610 vpn.onUserAdded(userId); 3611 } 3612 } 3613 } 3614 3615 private void onUserRemoved(int userId) { 3616 synchronized(mVpns) { 3617 final int vpnsSize = mVpns.size(); 3618 for (int i = 0; i < vpnsSize; i++) { 3619 Vpn vpn = mVpns.valueAt(i); 3620 vpn.onUserRemoved(userId); 3621 } 3622 } 3623 } 3624 3625 private void onUserUnlocked(int userId) { 3626 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3627 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3628 updateLockdownVpn(); 3629 } else { 3630 updateAlwaysOnVpn(userId); 3631 } 3632 } 3633 3634 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3635 @Override 3636 public void onReceive(Context context, Intent intent) { 3637 final String action = intent.getAction(); 3638 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3639 if (userId == UserHandle.USER_NULL) return; 3640 3641 if (Intent.ACTION_USER_STARTING.equals(action)) { 3642 onUserStart(userId); 3643 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3644 onUserStop(userId); 3645 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3646 onUserAdded(userId); 3647 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3648 onUserRemoved(userId); 3649 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3650 onUserUnlocked(userId); 3651 } 3652 } 3653 }; 3654 3655 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3656 new HashMap<Messenger, NetworkFactoryInfo>(); 3657 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3658 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3659 3660 private static class NetworkFactoryInfo { 3661 public final String name; 3662 public final Messenger messenger; 3663 public final AsyncChannel asyncChannel; 3664 3665 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3666 this.name = name; 3667 this.messenger = messenger; 3668 this.asyncChannel = asyncChannel; 3669 } 3670 } 3671 3672 /** 3673 * A NetworkRequest as registered by an application can be one of three 3674 * types: 3675 * 3676 * - "listen", for which the framework will issue callbacks about any 3677 * and all networks that match the specified NetworkCapabilities, 3678 * 3679 * - "request", capable of causing a specific network to be created 3680 * first (e.g. a telephony DUN request), the framework will issue 3681 * callbacks about the single, highest scoring current network 3682 * (if any) that matches the specified NetworkCapabilities, or 3683 * 3684 * - "track the default network", a hybrid of the two designed such 3685 * that the framework will issue callbacks for the single, highest 3686 * scoring current network (if any) that matches the capabilities of 3687 * the default Internet request (mDefaultRequest), but which cannot 3688 * cause the framework to either create or retain the existence of 3689 * any specific network. 3690 * 3691 */ 3692 private static enum NetworkRequestType { 3693 LISTEN, 3694 TRACK_DEFAULT, 3695 REQUEST 3696 }; 3697 3698 /** 3699 * Tracks info about the requester. 3700 * Also used to notice when the calling process dies so we can self-expire 3701 */ 3702 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3703 final NetworkRequest request; 3704 final PendingIntent mPendingIntent; 3705 boolean mPendingIntentSent; 3706 private final IBinder mBinder; 3707 final int mPid; 3708 final int mUid; 3709 final Messenger messenger; 3710 private final NetworkRequestType mType; 3711 3712 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, NetworkRequestType type) { 3713 request = r; 3714 mPendingIntent = pi; 3715 messenger = null; 3716 mBinder = null; 3717 mPid = getCallingPid(); 3718 mUid = getCallingUid(); 3719 mType = type; 3720 } 3721 3722 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, NetworkRequestType type) { 3723 super(); 3724 messenger = m; 3725 request = r; 3726 mBinder = binder; 3727 mPid = getCallingPid(); 3728 mUid = getCallingUid(); 3729 mType = type; 3730 mPendingIntent = null; 3731 3732 try { 3733 mBinder.linkToDeath(this, 0); 3734 } catch (RemoteException e) { 3735 binderDied(); 3736 } 3737 } 3738 3739 private String typeString() { 3740 switch (mType) { 3741 case LISTEN: return "Listen"; 3742 case REQUEST: return "Request"; 3743 case TRACK_DEFAULT: return "Track default"; 3744 default: 3745 return "unknown type"; 3746 } 3747 } 3748 3749 void unlinkDeathRecipient() { 3750 if (mBinder != null) { 3751 mBinder.unlinkToDeath(this, 0); 3752 } 3753 } 3754 3755 public void binderDied() { 3756 log("ConnectivityService NetworkRequestInfo binderDied(" + 3757 request + ", " + mBinder + ")"); 3758 releaseNetworkRequest(request); 3759 } 3760 3761 /** 3762 * Returns true iff. the contained NetworkRequest is one that: 3763 * 3764 * - should be associated with at most one satisfying network 3765 * at a time; 3766 * 3767 * - should cause a network to be kept up if it is the only network 3768 * which can satisfy the NetworkReqeust. 3769 * 3770 * For full detail of how isRequest() is used for pairing Networks with 3771 * NetworkRequests read rematchNetworkAndRequests(). 3772 * 3773 * TODO: Rename to something more properly descriptive. 3774 */ 3775 public boolean isRequest() { 3776 return (mType == NetworkRequestType.TRACK_DEFAULT) || 3777 (mType == NetworkRequestType.REQUEST); 3778 } 3779 3780 public String toString() { 3781 return typeString() + 3782 " from uid/pid:" + mUid + "/" + mPid + 3783 " for " + request + 3784 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3785 } 3786 } 3787 3788 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3789 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3790 if (badCapability != null) { 3791 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3792 } 3793 } 3794 3795 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3796 final SortedSet<Integer> thresholds = new TreeSet(); 3797 synchronized (nai) { 3798 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3799 if (nri.request.networkCapabilities.hasSignalStrength() && 3800 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3801 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3802 } 3803 } 3804 } 3805 return new ArrayList<Integer>(thresholds); 3806 } 3807 3808 private void updateSignalStrengthThresholds( 3809 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3810 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3811 Bundle thresholds = new Bundle(); 3812 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3813 3814 // TODO: Switch to VDBG. 3815 if (DBG) { 3816 String detail; 3817 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3818 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3819 } else { 3820 detail = reason; 3821 } 3822 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3823 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3824 } 3825 3826 nai.asyncChannel.sendMessage( 3827 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3828 0, 0, thresholds); 3829 } 3830 3831 @Override 3832 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3833 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3834 final NetworkRequestType type = (networkCapabilities == null) 3835 ? NetworkRequestType.TRACK_DEFAULT 3836 : NetworkRequestType.REQUEST; 3837 // If the requested networkCapabilities is null, take them instead from 3838 // the default network request. This allows callers to keep track of 3839 // the system default network. 3840 if (type == NetworkRequestType.TRACK_DEFAULT) { 3841 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 3842 enforceAccessPermission(); 3843 } else { 3844 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3845 enforceNetworkRequestPermissions(networkCapabilities); 3846 } 3847 enforceMeteredApnPolicy(networkCapabilities); 3848 ensureRequestableCapabilities(networkCapabilities); 3849 3850 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3851 throw new IllegalArgumentException("Bad timeout specified"); 3852 } 3853 3854 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 3855 .equals(networkCapabilities.getNetworkSpecifier())) { 3856 throw new IllegalArgumentException("Invalid network specifier - must not be '" 3857 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 3858 } 3859 3860 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3861 nextNetworkRequestId()); 3862 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, type); 3863 if (DBG) log("requestNetwork for " + nri); 3864 3865 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3866 if (timeoutMs > 0) { 3867 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3868 nri), timeoutMs); 3869 } 3870 return networkRequest; 3871 } 3872 3873 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3874 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 3875 enforceConnectivityInternalPermission(); 3876 } else { 3877 enforceChangePermission(); 3878 } 3879 } 3880 3881 @Override 3882 public boolean requestBandwidthUpdate(Network network) { 3883 enforceAccessPermission(); 3884 NetworkAgentInfo nai = null; 3885 if (network == null) { 3886 return false; 3887 } 3888 synchronized (mNetworkForNetId) { 3889 nai = mNetworkForNetId.get(network.netId); 3890 } 3891 if (nai != null) { 3892 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3893 return true; 3894 } 3895 return false; 3896 } 3897 3898 3899 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3900 // if UID is restricted, don't allow them to bring up metered APNs 3901 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 3902 final int uidRules; 3903 final int uid = Binder.getCallingUid(); 3904 synchronized(mRulesLock) { 3905 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3906 } 3907 if (uidRules != RULE_ALLOW_ALL) { 3908 // we could silently fail or we can filter the available nets to only give 3909 // them those they have access to. Chose the more useful 3910 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 3911 } 3912 } 3913 } 3914 3915 @Override 3916 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3917 PendingIntent operation) { 3918 checkNotNull(operation, "PendingIntent cannot be null."); 3919 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3920 enforceNetworkRequestPermissions(networkCapabilities); 3921 enforceMeteredApnPolicy(networkCapabilities); 3922 ensureRequestableCapabilities(networkCapabilities); 3923 3924 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3925 nextNetworkRequestId()); 3926 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3927 NetworkRequestType.REQUEST); 3928 if (DBG) log("pendingRequest for " + nri); 3929 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3930 nri)); 3931 return networkRequest; 3932 } 3933 3934 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3935 mHandler.sendMessageDelayed( 3936 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3937 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3938 } 3939 3940 @Override 3941 public void releasePendingNetworkRequest(PendingIntent operation) { 3942 checkNotNull(operation, "PendingIntent cannot be null."); 3943 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3944 getCallingUid(), 0, operation)); 3945 } 3946 3947 // In order to implement the compatibility measure for pre-M apps that call 3948 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 3949 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 3950 // This ensures it has permission to do so. 3951 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 3952 if (nc == null) { 3953 return false; 3954 } 3955 int[] transportTypes = nc.getTransportTypes(); 3956 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 3957 return false; 3958 } 3959 try { 3960 mContext.enforceCallingOrSelfPermission( 3961 android.Manifest.permission.ACCESS_WIFI_STATE, 3962 "ConnectivityService"); 3963 } catch (SecurityException e) { 3964 return false; 3965 } 3966 return true; 3967 } 3968 3969 @Override 3970 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 3971 Messenger messenger, IBinder binder) { 3972 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3973 enforceAccessPermission(); 3974 } 3975 3976 NetworkRequest networkRequest = new NetworkRequest( 3977 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3978 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3979 NetworkRequestType.LISTEN); 3980 if (DBG) log("listenForNetwork for " + nri); 3981 3982 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3983 return networkRequest; 3984 } 3985 3986 @Override 3987 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 3988 PendingIntent operation) { 3989 checkNotNull(operation, "PendingIntent cannot be null."); 3990 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3991 enforceAccessPermission(); 3992 } 3993 3994 NetworkRequest networkRequest = new NetworkRequest( 3995 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3996 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3997 NetworkRequestType.LISTEN); 3998 if (DBG) log("pendingListenForNetwork for " + nri); 3999 4000 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4001 } 4002 4003 @Override 4004 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4005 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 4006 0, networkRequest)); 4007 } 4008 4009 @Override 4010 public void registerNetworkFactory(Messenger messenger, String name) { 4011 enforceConnectivityInternalPermission(); 4012 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4013 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4014 } 4015 4016 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4017 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4018 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4019 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4020 } 4021 4022 @Override 4023 public void unregisterNetworkFactory(Messenger messenger) { 4024 enforceConnectivityInternalPermission(); 4025 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4026 } 4027 4028 private void handleUnregisterNetworkFactory(Messenger messenger) { 4029 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4030 if (nfi == null) { 4031 loge("Failed to find Messenger in unregisterNetworkFactory"); 4032 return; 4033 } 4034 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4035 } 4036 4037 /** 4038 * NetworkAgentInfo supporting a request by requestId. 4039 * These have already been vetted (their Capabilities satisfy the request) 4040 * and the are the highest scored network available. 4041 * the are keyed off the Requests requestId. 4042 */ 4043 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4044 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4045 new SparseArray<NetworkAgentInfo>(); 4046 4047 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4048 @GuardedBy("mNetworkForNetId") 4049 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4050 new SparseArray<NetworkAgentInfo>(); 4051 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4052 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4053 // there may not be a strict 1:1 correlation between the two. 4054 @GuardedBy("mNetworkForNetId") 4055 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4056 4057 // NetworkAgentInfo keyed off its connecting messenger 4058 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4059 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4060 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4061 new HashMap<Messenger, NetworkAgentInfo>(); 4062 4063 @GuardedBy("mBlockedAppUids") 4064 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4065 4066 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4067 private final NetworkRequest mDefaultRequest; 4068 4069 // Request used to optionally keep mobile data active even when higher 4070 // priority networks like Wi-Fi are active. 4071 private final NetworkRequest mDefaultMobileDataRequest; 4072 4073 private NetworkAgentInfo getDefaultNetwork() { 4074 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4075 } 4076 4077 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4078 return nai == getDefaultNetwork(); 4079 } 4080 4081 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4082 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4083 int currentScore, NetworkMisc networkMisc) { 4084 enforceConnectivityInternalPermission(); 4085 4086 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4087 // satisfies mDefaultRequest. 4088 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4089 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4090 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4091 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4092 synchronized (this) { 4093 nai.networkMonitor.systemReady = mSystemReady; 4094 } 4095 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network); 4096 if (DBG) log("registerNetworkAgent " + nai); 4097 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4098 return nai.network.netId; 4099 } 4100 4101 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4102 if (VDBG) log("Got NetworkAgent Messenger"); 4103 mNetworkAgentInfos.put(na.messenger, na); 4104 synchronized (mNetworkForNetId) { 4105 mNetworkForNetId.put(na.network.netId, na); 4106 } 4107 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4108 NetworkInfo networkInfo = na.networkInfo; 4109 na.networkInfo = null; 4110 updateNetworkInfo(na, networkInfo); 4111 } 4112 4113 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4114 LinkProperties newLp = networkAgent.linkProperties; 4115 int netId = networkAgent.network.netId; 4116 4117 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4118 // we do anything else, make sure its LinkProperties are accurate. 4119 if (networkAgent.clatd != null) { 4120 networkAgent.clatd.fixupLinkProperties(oldLp); 4121 } 4122 4123 updateInterfaces(newLp, oldLp, netId); 4124 updateMtu(newLp, oldLp); 4125 // TODO - figure out what to do for clat 4126// for (LinkProperties lp : newLp.getStackedLinks()) { 4127// updateMtu(lp, null); 4128// } 4129 updateTcpBufferSizes(networkAgent); 4130 4131 updateRoutes(newLp, oldLp, netId); 4132 updateDnses(newLp, oldLp, netId); 4133 4134 updateClat(newLp, oldLp, networkAgent); 4135 if (isDefaultNetwork(networkAgent)) { 4136 handleApplyDefaultProxy(newLp.getHttpProxy()); 4137 } else { 4138 updateProxy(newLp, oldLp, networkAgent); 4139 } 4140 // TODO - move this check to cover the whole function 4141 if (!Objects.equals(newLp, oldLp)) { 4142 notifyIfacesChangedForNetworkStats(); 4143 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4144 } 4145 4146 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4147 } 4148 4149 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4150 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4151 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4152 4153 if (!wasRunningClat && shouldRunClat) { 4154 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4155 nai.clatd.start(); 4156 } else if (wasRunningClat && !shouldRunClat) { 4157 nai.clatd.stop(); 4158 } 4159 } 4160 4161 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4162 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4163 if (oldLp != null) { 4164 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4165 } else if (newLp != null) { 4166 interfaceDiff.added = newLp.getAllInterfaceNames(); 4167 } 4168 for (String iface : interfaceDiff.added) { 4169 try { 4170 if (DBG) log("Adding iface " + iface + " to network " + netId); 4171 mNetd.addInterfaceToNetwork(iface, netId); 4172 } catch (Exception e) { 4173 loge("Exception adding interface: " + e); 4174 } 4175 } 4176 for (String iface : interfaceDiff.removed) { 4177 try { 4178 if (DBG) log("Removing iface " + iface + " from network " + netId); 4179 mNetd.removeInterfaceFromNetwork(iface, netId); 4180 } catch (Exception e) { 4181 loge("Exception removing interface: " + e); 4182 } 4183 } 4184 } 4185 4186 /** 4187 * Have netd update routes from oldLp to newLp. 4188 * @return true if routes changed between oldLp and newLp 4189 */ 4190 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4191 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4192 if (oldLp != null) { 4193 routeDiff = oldLp.compareAllRoutes(newLp); 4194 } else if (newLp != null) { 4195 routeDiff.added = newLp.getAllRoutes(); 4196 } 4197 4198 // add routes before removing old in case it helps with continuous connectivity 4199 4200 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4201 for (RouteInfo route : routeDiff.added) { 4202 if (route.hasGateway()) continue; 4203 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4204 try { 4205 mNetd.addRoute(netId, route); 4206 } catch (Exception e) { 4207 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4208 loge("Exception in addRoute for non-gateway: " + e); 4209 } 4210 } 4211 } 4212 for (RouteInfo route : routeDiff.added) { 4213 if (route.hasGateway() == false) continue; 4214 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4215 try { 4216 mNetd.addRoute(netId, route); 4217 } catch (Exception e) { 4218 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4219 loge("Exception in addRoute for gateway: " + e); 4220 } 4221 } 4222 } 4223 4224 for (RouteInfo route : routeDiff.removed) { 4225 if (DBG) log("Removing Route [" + route + "] from network " + netId); 4226 try { 4227 mNetd.removeRoute(netId, route); 4228 } catch (Exception e) { 4229 loge("Exception in removeRoute: " + e); 4230 } 4231 } 4232 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4233 } 4234 4235 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4236 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4237 return; // no updating necessary 4238 } 4239 4240 Collection<InetAddress> dnses = newLp.getDnsServers(); 4241 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 4242 try { 4243 mNetd.setDnsServersForNetwork( 4244 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4245 } catch (Exception e) { 4246 loge("Exception in setDnsServersForNetwork: " + e); 4247 } 4248 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4249 if (defaultNai != null && defaultNai.network.netId == netId) { 4250 setDefaultDnsSystemProperties(dnses); 4251 } 4252 flushVmDnsCache(); 4253 } 4254 4255 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4256 int last = 0; 4257 for (InetAddress dns : dnses) { 4258 ++last; 4259 String key = "net.dns" + last; 4260 String value = dns.getHostAddress(); 4261 SystemProperties.set(key, value); 4262 } 4263 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4264 String key = "net.dns" + i; 4265 SystemProperties.set(key, ""); 4266 } 4267 mNumDnsEntries = last; 4268 } 4269 4270 /** 4271 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4272 * augmented with any stateful capabilities implied from {@code networkAgent} 4273 * (e.g., validated status and captive portal status). 4274 * 4275 * @param nai the network having its capabilities updated. 4276 * @param networkCapabilities the new network capabilities. 4277 */ 4278 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4279 // Don't modify caller's NetworkCapabilities. 4280 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4281 if (nai.lastValidated) { 4282 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4283 } else { 4284 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4285 } 4286 if (nai.lastCaptivePortalDetected) { 4287 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4288 } else { 4289 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4290 } 4291 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4292 final int oldScore = nai.getCurrentScore(); 4293 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4294 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4295 try { 4296 mNetd.setNetworkPermission(nai.network.netId, 4297 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4298 null : NetworkManagementService.PERMISSION_SYSTEM); 4299 } catch (RemoteException e) { 4300 loge("Exception in setNetworkPermission: " + e); 4301 } 4302 } 4303 synchronized (nai) { 4304 nai.networkCapabilities = networkCapabilities; 4305 } 4306 rematchAllNetworksAndRequests(nai, oldScore); 4307 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4308 } 4309 } 4310 4311 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4312 for (int i = 0; i < nai.networkRequests.size(); i++) { 4313 NetworkRequest nr = nai.networkRequests.valueAt(i); 4314 // Don't send listening requests to factories. b/17393458 4315 if (!isRequest(nr)) continue; 4316 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4317 } 4318 } 4319 4320 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4321 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4322 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4323 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4324 networkRequest); 4325 } 4326 } 4327 4328 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4329 int notificationType) { 4330 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4331 Intent intent = new Intent(); 4332 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4333 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4334 nri.mPendingIntentSent = true; 4335 sendIntent(nri.mPendingIntent, intent); 4336 } 4337 // else not handled 4338 } 4339 4340 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4341 mPendingIntentWakeLock.acquire(); 4342 try { 4343 if (DBG) log("Sending " + pendingIntent); 4344 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4345 } catch (PendingIntent.CanceledException e) { 4346 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4347 mPendingIntentWakeLock.release(); 4348 releasePendingNetworkRequest(pendingIntent); 4349 } 4350 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4351 } 4352 4353 @Override 4354 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4355 String resultData, Bundle resultExtras) { 4356 if (DBG) log("Finished sending " + pendingIntent); 4357 mPendingIntentWakeLock.release(); 4358 // Release with a delay so the receiving client has an opportunity to put in its 4359 // own request. 4360 releasePendingNetworkRequestWithDelay(pendingIntent); 4361 } 4362 4363 private void callCallbackForRequest(NetworkRequestInfo nri, 4364 NetworkAgentInfo networkAgent, int notificationType) { 4365 if (nri.messenger == null) return; // Default request has no msgr 4366 Bundle bundle = new Bundle(); 4367 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4368 new NetworkRequest(nri.request)); 4369 Message msg = Message.obtain(); 4370 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4371 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4372 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4373 } 4374 switch (notificationType) { 4375 case ConnectivityManager.CALLBACK_LOSING: { 4376 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4377 break; 4378 } 4379 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4380 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4381 new NetworkCapabilities(networkAgent.networkCapabilities)); 4382 break; 4383 } 4384 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4385 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4386 new LinkProperties(networkAgent.linkProperties)); 4387 break; 4388 } 4389 } 4390 msg.what = notificationType; 4391 msg.setData(bundle); 4392 try { 4393 if (VDBG) { 4394 log("sending notification " + notifyTypeToName(notificationType) + 4395 " for " + nri.request); 4396 } 4397 nri.messenger.send(msg); 4398 } catch (RemoteException e) { 4399 // may occur naturally in the race of binder death. 4400 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4401 } 4402 } 4403 4404 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4405 for (int i = 0; i < nai.networkRequests.size(); i++) { 4406 NetworkRequest nr = nai.networkRequests.valueAt(i); 4407 // Ignore listening requests. 4408 if (!isRequest(nr)) continue; 4409 loge("Dead network still had at least " + nr); 4410 break; 4411 } 4412 nai.asyncChannel.disconnect(); 4413 } 4414 4415 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4416 if (oldNetwork == null) { 4417 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4418 return; 4419 } 4420 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4421 teardownUnneededNetwork(oldNetwork); 4422 } 4423 4424 private void makeDefault(NetworkAgentInfo newNetwork) { 4425 if (DBG) log("Switching to new default network: " + newNetwork); 4426 ConnectivityServiceChangeEvent.logEvent(newNetwork.network.netId); 4427 setupDataActivityTracking(newNetwork); 4428 try { 4429 mNetd.setDefaultNetId(newNetwork.network.netId); 4430 } catch (Exception e) { 4431 loge("Exception setting default network :" + e); 4432 } 4433 notifyLockdownVpn(newNetwork); 4434 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4435 updateTcpBufferSizes(newNetwork); 4436 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4437 } 4438 4439 // Handles a network appearing or improving its score. 4440 // 4441 // - Evaluates all current NetworkRequests that can be 4442 // satisfied by newNetwork, and reassigns to newNetwork 4443 // any such requests for which newNetwork is the best. 4444 // 4445 // - Lingers any validated Networks that as a result are no longer 4446 // needed. A network is needed if it is the best network for 4447 // one or more NetworkRequests, or if it is a VPN. 4448 // 4449 // - Tears down newNetwork if it just became validated 4450 // but turns out to be unneeded. 4451 // 4452 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4453 // networks that have no chance (i.e. even if validated) 4454 // of becoming the highest scoring network. 4455 // 4456 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4457 // it does not remove NetworkRequests that other Networks could better satisfy. 4458 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4459 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4460 // as it performs better by a factor of the number of Networks. 4461 // 4462 // @param newNetwork is the network to be matched against NetworkRequests. 4463 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4464 // performed to tear down unvalidated networks that have no chance (i.e. even if 4465 // validated) of becoming the highest scoring network. 4466 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4467 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4468 if (!newNetwork.created) return; 4469 boolean keep = newNetwork.isVPN(); 4470 boolean isNewDefault = false; 4471 NetworkAgentInfo oldDefaultNetwork = null; 4472 if (VDBG) log("rematching " + newNetwork.name()); 4473 // Find and migrate to this Network any NetworkRequests for 4474 // which this network is now the best. 4475 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4476 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4477 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4478 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4479 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4480 final boolean satisfies = newNetwork.satisfies(nri.request); 4481 if (newNetwork == currentNetwork && satisfies) { 4482 if (VDBG) { 4483 log("Network " + newNetwork.name() + " was already satisfying" + 4484 " request " + nri.request.requestId + ". No change."); 4485 } 4486 keep = true; 4487 continue; 4488 } 4489 4490 // check if it satisfies the NetworkCapabilities 4491 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4492 if (satisfies) { 4493 if (!nri.isRequest()) { 4494 // This is not a request, it's a callback listener. 4495 // Add it to newNetwork regardless of score. 4496 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4497 continue; 4498 } 4499 4500 // next check if it's better than any current network we're using for 4501 // this request 4502 if (VDBG) { 4503 log("currentScore = " + 4504 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4505 ", newScore = " + newNetwork.getCurrentScore()); 4506 } 4507 if (currentNetwork == null || 4508 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4509 if (DBG) log("rematch for " + newNetwork.name()); 4510 if (currentNetwork != null) { 4511 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4512 currentNetwork.networkRequests.remove(nri.request.requestId); 4513 currentNetwork.networkLingered.add(nri.request); 4514 affectedNetworks.add(currentNetwork); 4515 } else { 4516 if (DBG) log(" accepting network in place of null"); 4517 } 4518 unlinger(newNetwork); 4519 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4520 if (!newNetwork.addRequest(nri.request)) { 4521 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4522 } 4523 addedRequests.add(nri); 4524 keep = true; 4525 // Tell NetworkFactories about the new score, so they can stop 4526 // trying to connect if they know they cannot match it. 4527 // TODO - this could get expensive if we have alot of requests for this 4528 // network. Think about if there is a way to reduce this. Push 4529 // netid->request mapping to each factory? 4530 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4531 if (mDefaultRequest.requestId == nri.request.requestId) { 4532 isNewDefault = true; 4533 oldDefaultNetwork = currentNetwork; 4534 } 4535 } 4536 } else if (newNetwork.networkRequests.get(nri.request.requestId) != null) { 4537 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4538 // mark it as no longer satisfying "nri". Because networks are processed by 4539 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4540 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4541 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4542 // This means this code doesn't have to handle the case where "currentNetwork" no 4543 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4544 if (DBG) { 4545 log("Network " + newNetwork.name() + " stopped satisfying" + 4546 " request " + nri.request.requestId); 4547 } 4548 newNetwork.networkRequests.remove(nri.request.requestId); 4549 if (currentNetwork == newNetwork) { 4550 mNetworkForRequestId.remove(nri.request.requestId); 4551 sendUpdatedScoreToFactories(nri.request, 0); 4552 } else { 4553 if (nri.isRequest()) { 4554 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4555 newNetwork.name() + 4556 " without updating mNetworkForRequestId or factories!"); 4557 } 4558 } 4559 // TODO: technically, sending CALLBACK_LOST here is 4560 // incorrect if nri is a request (not a listen) and there 4561 // is a replacement network currently connected that can 4562 // satisfy it. However, the only capability that can both 4563 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4564 // so this code is only incorrect for a network that loses 4565 // the TRUSTED capability, which is a rare case. 4566 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST); 4567 } 4568 } 4569 // Linger any networks that are no longer needed. 4570 for (NetworkAgentInfo nai : affectedNetworks) { 4571 if (nai.lingering) { 4572 // Already lingered. Nothing to do. This can only happen if "nai" is in 4573 // "affectedNetworks" twice. The reasoning being that to get added to 4574 // "affectedNetworks", "nai" must have been satisfying a NetworkRequest 4575 // (i.e. not lingered) so it could have only been lingered by this loop. 4576 // unneeded(nai) will be false and we'll call unlinger() below which would 4577 // be bad, so handle it here. 4578 } else if (unneeded(nai)) { 4579 linger(nai); 4580 } else { 4581 // Clear nai.networkLingered we might have added above. 4582 unlinger(nai); 4583 } 4584 } 4585 if (isNewDefault) { 4586 // Notify system services that this network is up. 4587 makeDefault(newNetwork); 4588 synchronized (ConnectivityService.this) { 4589 // have a new default network, release the transition wakelock in 4590 // a second if it's held. The second pause is to allow apps 4591 // to reconnect over the new network 4592 if (mNetTransitionWakeLock.isHeld()) { 4593 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4594 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4595 mNetTransitionWakeLockSerialNumber, 0), 4596 1000); 4597 } 4598 } 4599 } 4600 4601 // do this after the default net is switched, but 4602 // before LegacyTypeTracker sends legacy broadcasts 4603 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4604 4605 if (isNewDefault) { 4606 // Maintain the illusion: since the legacy API only 4607 // understands one network at a time, we must pretend 4608 // that the current default network disconnected before 4609 // the new one connected. 4610 if (oldDefaultNetwork != null) { 4611 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4612 oldDefaultNetwork, true); 4613 } 4614 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4615 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4616 notifyLockdownVpn(newNetwork); 4617 } 4618 4619 if (keep) { 4620 // Notify battery stats service about this network, both the normal 4621 // interface and any stacked links. 4622 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4623 try { 4624 final IBatteryStats bs = BatteryStatsService.getService(); 4625 final int type = newNetwork.networkInfo.getType(); 4626 4627 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4628 bs.noteNetworkInterfaceType(baseIface, type); 4629 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4630 final String stackedIface = stacked.getInterfaceName(); 4631 bs.noteNetworkInterfaceType(stackedIface, type); 4632 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4633 } 4634 } catch (RemoteException ignored) { 4635 } 4636 4637 // This has to happen after the notifyNetworkCallbacks as that tickles each 4638 // ConnectivityManager instance so that legacy requests correctly bind dns 4639 // requests to this network. The legacy users are listening for this bcast 4640 // and will generally do a dns request so they can ensureRouteToHost and if 4641 // they do that before the callbacks happen they'll use the default network. 4642 // 4643 // TODO: Is there still a race here? We send the broadcast 4644 // after sending the callback, but if the app can receive the 4645 // broadcast before the callback, it might still break. 4646 // 4647 // This *does* introduce a race where if the user uses the new api 4648 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4649 // they may get old info. Reverse this after the old startUsing api is removed. 4650 // This is on top of the multiple intent sequencing referenced in the todo above. 4651 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4652 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4653 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4654 // legacy type tracker filters out repeat adds 4655 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4656 } 4657 } 4658 4659 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4660 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4661 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4662 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4663 if (newNetwork.isVPN()) { 4664 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4665 } 4666 } 4667 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4668 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4669 if (unneeded(nai)) { 4670 if (DBG) log("Reaping " + nai.name()); 4671 teardownUnneededNetwork(nai); 4672 } 4673 } 4674 } 4675 } 4676 4677 /** 4678 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4679 * being disconnected. 4680 * @param changed If only one Network's score or capabilities have been modified since the last 4681 * time this function was called, pass this Network in this argument, otherwise pass 4682 * null. 4683 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4684 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4685 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4686 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4687 * network's score. 4688 */ 4689 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4690 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4691 // to avoid the slowness. It is not simply enough to process just "changed", for 4692 // example in the case where "changed"'s score decreases and another network should begin 4693 // satifying a NetworkRequest that "changed" currently satisfies. 4694 4695 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4696 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4697 // rematchNetworkAndRequests() handles. 4698 if (changed != null && oldScore < changed.getCurrentScore()) { 4699 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP); 4700 } else { 4701 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4702 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4703 // Rematch higher scoring networks first to prevent requests first matching a lower 4704 // scoring network and then a higher scoring network, which could produce multiple 4705 // callbacks and inadvertently unlinger networks. 4706 Arrays.sort(nais); 4707 for (NetworkAgentInfo nai : nais) { 4708 rematchNetworkAndRequests(nai, 4709 // Only reap the last time through the loop. Reaping before all rematching 4710 // is complete could incorrectly teardown a network that hasn't yet been 4711 // rematched. 4712 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4713 : ReapUnvalidatedNetworks.REAP); 4714 } 4715 } 4716 } 4717 4718 private void updateInetCondition(NetworkAgentInfo nai) { 4719 // Don't bother updating until we've graduated to validated at least once. 4720 if (!nai.everValidated) return; 4721 // For now only update icons for default connection. 4722 // TODO: Update WiFi and cellular icons separately. b/17237507 4723 if (!isDefaultNetwork(nai)) return; 4724 4725 int newInetCondition = nai.lastValidated ? 100 : 0; 4726 // Don't repeat publish. 4727 if (newInetCondition == mDefaultInetConditionPublished) return; 4728 4729 mDefaultInetConditionPublished = newInetCondition; 4730 sendInetConditionBroadcast(nai.networkInfo); 4731 } 4732 4733 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4734 if (mLockdownTracker != null) { 4735 if (nai != null && nai.isVPN()) { 4736 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4737 } else { 4738 mLockdownTracker.onNetworkInfoChanged(); 4739 } 4740 } 4741 } 4742 4743 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4744 NetworkInfo.State state = newInfo.getState(); 4745 NetworkInfo oldInfo = null; 4746 final int oldScore = networkAgent.getCurrentScore(); 4747 synchronized (networkAgent) { 4748 oldInfo = networkAgent.networkInfo; 4749 networkAgent.networkInfo = newInfo; 4750 } 4751 notifyLockdownVpn(networkAgent); 4752 4753 if (oldInfo != null && oldInfo.getState() == state) { 4754 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 4755 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 4756 notifyIfacesChangedForNetworkStats(); 4757 } else if (VDBG) log("ignoring duplicate network state non-change"); 4758 // In either case, no further work should be needed. 4759 return; 4760 } 4761 if (DBG) { 4762 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4763 (oldInfo == null ? "null" : oldInfo.getState()) + 4764 " to " + state); 4765 } 4766 4767 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4768 try { 4769 // This should never fail. Specifying an already in use NetID will cause failure. 4770 if (networkAgent.isVPN()) { 4771 mNetd.createVirtualNetwork(networkAgent.network.netId, 4772 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4773 (networkAgent.networkMisc == null || 4774 !networkAgent.networkMisc.allowBypass)); 4775 } else { 4776 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4777 networkAgent.networkCapabilities.hasCapability( 4778 NET_CAPABILITY_NOT_RESTRICTED) ? 4779 null : NetworkManagementService.PERMISSION_SYSTEM); 4780 } 4781 } catch (Exception e) { 4782 loge("Error creating network " + networkAgent.network.netId + ": " 4783 + e.getMessage()); 4784 return; 4785 } 4786 networkAgent.created = true; 4787 updateLinkProperties(networkAgent, null); 4788 notifyIfacesChangedForNetworkStats(); 4789 4790 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4791 scheduleUnvalidatedPrompt(networkAgent); 4792 4793 if (networkAgent.isVPN()) { 4794 // Temporarily disable the default proxy (not global). 4795 synchronized (mProxyLock) { 4796 if (!mDefaultProxyDisabled) { 4797 mDefaultProxyDisabled = true; 4798 if (mGlobalProxy == null && mDefaultProxy != null) { 4799 sendProxyBroadcast(null); 4800 } 4801 } 4802 } 4803 // TODO: support proxy per network. 4804 } 4805 4806 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 4807 // be communicated to a particular NetworkAgent depends only on the network's immutable, 4808 // capabilities, so it only needs to be done once on initial connect, not every time the 4809 // network's capabilities change. Note that we do this before rematching the network, 4810 // so we could decide to tear it down immediately afterwards. That's fine though - on 4811 // disconnection NetworkAgents should stop any signal strength monitoring they have been 4812 // doing. 4813 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 4814 4815 // Consider network even though it is not yet validated. 4816 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP); 4817 4818 // This has to happen after matching the requests, because callbacks are just requests. 4819 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4820 } else if (state == NetworkInfo.State.DISCONNECTED) { 4821 networkAgent.asyncChannel.disconnect(); 4822 if (networkAgent.isVPN()) { 4823 synchronized (mProxyLock) { 4824 if (mDefaultProxyDisabled) { 4825 mDefaultProxyDisabled = false; 4826 if (mGlobalProxy == null && mDefaultProxy != null) { 4827 sendProxyBroadcast(mDefaultProxy); 4828 } 4829 } 4830 } 4831 } 4832 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 4833 state == NetworkInfo.State.SUSPENDED) { 4834 // going into or coming out of SUSPEND: rescore and notify 4835 if (networkAgent.getCurrentScore() != oldScore) { 4836 rematchAllNetworksAndRequests(networkAgent, oldScore); 4837 } 4838 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 4839 ConnectivityManager.CALLBACK_SUSPENDED : 4840 ConnectivityManager.CALLBACK_RESUMED)); 4841 mLegacyTypeTracker.update(networkAgent); 4842 } 4843 } 4844 4845 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4846 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4847 if (score < 0) { 4848 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4849 "). Bumping score to min of 0"); 4850 score = 0; 4851 } 4852 4853 final int oldScore = nai.getCurrentScore(); 4854 nai.setCurrentScore(score); 4855 4856 rematchAllNetworksAndRequests(nai, oldScore); 4857 4858 sendUpdatedScoreToFactories(nai); 4859 } 4860 4861 // notify only this one new request of the current state 4862 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4863 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4864 // TODO - read state from monitor to decide what to send. 4865// if (nai.networkMonitor.isLingering()) { 4866// notifyType = NetworkCallbacks.LOSING; 4867// } else if (nai.networkMonitor.isEvaluating()) { 4868// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4869// } 4870 if (nri.mPendingIntent == null) { 4871 callCallbackForRequest(nri, nai, notifyType); 4872 } else { 4873 sendPendingIntentForRequest(nri, nai, notifyType); 4874 } 4875 } 4876 4877 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 4878 // The NetworkInfo we actually send out has no bearing on the real 4879 // state of affairs. For example, if the default connection is mobile, 4880 // and a request for HIPRI has just gone away, we need to pretend that 4881 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4882 // the state to DISCONNECTED, even though the network is of type MOBILE 4883 // and is still connected. 4884 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4885 info.setType(type); 4886 if (state != DetailedState.DISCONNECTED) { 4887 info.setDetailedState(state, null, info.getExtraInfo()); 4888 sendConnectedBroadcast(info); 4889 } else { 4890 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 4891 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4892 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4893 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4894 if (info.isFailover()) { 4895 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4896 nai.networkInfo.setFailover(false); 4897 } 4898 if (info.getReason() != null) { 4899 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4900 } 4901 if (info.getExtraInfo() != null) { 4902 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4903 } 4904 NetworkAgentInfo newDefaultAgent = null; 4905 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4906 newDefaultAgent = getDefaultNetwork(); 4907 if (newDefaultAgent != null) { 4908 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4909 newDefaultAgent.networkInfo); 4910 } else { 4911 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4912 } 4913 } 4914 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4915 mDefaultInetConditionPublished); 4916 sendStickyBroadcast(intent); 4917 if (newDefaultAgent != null) { 4918 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4919 } 4920 } 4921 } 4922 4923 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4924 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4925 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4926 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4927 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4928 if (VDBG) log(" sending notification for " + nr); 4929 if (nri.mPendingIntent == null) { 4930 callCallbackForRequest(nri, networkAgent, notifyType); 4931 } else { 4932 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4933 } 4934 } 4935 } 4936 4937 private String notifyTypeToName(int notifyType) { 4938 switch (notifyType) { 4939 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4940 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4941 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4942 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4943 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4944 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4945 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4946 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4947 } 4948 return "UNKNOWN"; 4949 } 4950 4951 /** 4952 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 4953 * properties tracked by NetworkStatsService on an active iface has changed. 4954 */ 4955 private void notifyIfacesChangedForNetworkStats() { 4956 try { 4957 mStatsService.forceUpdateIfaces(); 4958 } catch (Exception ignored) { 4959 } 4960 } 4961 4962 @Override 4963 public boolean addVpnAddress(String address, int prefixLength) { 4964 throwIfLockdownEnabled(); 4965 int user = UserHandle.getUserId(Binder.getCallingUid()); 4966 synchronized (mVpns) { 4967 return mVpns.get(user).addAddress(address, prefixLength); 4968 } 4969 } 4970 4971 @Override 4972 public boolean removeVpnAddress(String address, int prefixLength) { 4973 throwIfLockdownEnabled(); 4974 int user = UserHandle.getUserId(Binder.getCallingUid()); 4975 synchronized (mVpns) { 4976 return mVpns.get(user).removeAddress(address, prefixLength); 4977 } 4978 } 4979 4980 @Override 4981 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 4982 throwIfLockdownEnabled(); 4983 int user = UserHandle.getUserId(Binder.getCallingUid()); 4984 boolean success; 4985 synchronized (mVpns) { 4986 success = mVpns.get(user).setUnderlyingNetworks(networks); 4987 } 4988 if (success) { 4989 notifyIfacesChangedForNetworkStats(); 4990 } 4991 return success; 4992 } 4993 4994 @Override 4995 public String getCaptivePortalServerUrl() { 4996 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 4997 } 4998 4999 @Override 5000 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5001 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5002 enforceKeepalivePermission(); 5003 mKeepaliveTracker.startNattKeepalive( 5004 getNetworkAgentInfoForNetwork(network), 5005 intervalSeconds, messenger, binder, 5006 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5007 } 5008 5009 @Override 5010 public void stopKeepalive(Network network, int slot) { 5011 mHandler.sendMessage(mHandler.obtainMessage( 5012 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5013 } 5014 5015 @Override 5016 public void factoryReset() { 5017 enforceConnectivityInternalPermission(); 5018 5019 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5020 return; 5021 } 5022 5023 final int userId = UserHandle.getCallingUserId(); 5024 5025 // Turn airplane mode off 5026 setAirplaneMode(false); 5027 5028 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5029 // Untether 5030 for (String tether : getTetheredIfaces()) { 5031 untether(tether); 5032 } 5033 } 5034 5035 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5036 // Turn VPN off 5037 VpnConfig vpnConfig = getVpnConfig(userId); 5038 if (vpnConfig != null) { 5039 if (vpnConfig.legacy) { 5040 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5041 } else { 5042 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5043 // in the future without user intervention. 5044 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5045 5046 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN, userId); 5047 } 5048 } 5049 } 5050 } 5051 5052 @VisibleForTesting 5053 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5054 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5055 return new NetworkMonitor(context, handler, nai, defaultRequest); 5056 } 5057} 5058