ConnectivityService.java revision e0e413e2b17a0164e15c77f4ab51b3166f9111d2
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.AlarmManager; 37import android.app.BroadcastOptions; 38import android.app.Notification; 39import android.app.NotificationManager; 40import android.app.PendingIntent; 41import android.content.BroadcastReceiver; 42import android.content.ContentResolver; 43import android.content.Context; 44import android.content.Intent; 45import android.content.IntentFilter; 46import android.content.pm.PackageManager; 47import android.content.res.Configuration; 48import android.content.res.Resources; 49import android.database.ContentObserver; 50import android.net.ConnectivityManager; 51import android.net.ConnectivityManager.PacketKeepalive; 52import android.net.IConnectivityManager; 53import android.net.INetworkManagementEventObserver; 54import android.net.INetworkPolicyListener; 55import android.net.INetworkPolicyManager; 56import android.net.INetworkStatsService; 57import android.net.LinkProperties; 58import android.net.LinkProperties.CompareResult; 59import android.net.Network; 60import android.net.NetworkAgent; 61import android.net.NetworkCapabilities; 62import android.net.NetworkConfig; 63import android.net.NetworkInfo; 64import android.net.NetworkInfo.DetailedState; 65import android.net.NetworkMisc; 66import android.net.NetworkQuotaInfo; 67import android.net.NetworkRequest; 68import android.net.NetworkState; 69import android.net.NetworkUtils; 70import android.net.Proxy; 71import android.net.ProxyInfo; 72import android.net.RouteInfo; 73import android.net.UidRange; 74import android.net.Uri; 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.SystemClock; 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.telephony.DctConstants; 118import com.android.internal.util.AsyncChannel; 119import com.android.internal.util.IndentingPrintWriter; 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.Iterator; 158import java.util.List; 159import java.util.Map; 160import java.util.Objects; 161import java.util.concurrent.atomic.AtomicInteger; 162 163/** 164 * @hide 165 */ 166public class ConnectivityService extends IConnectivityManager.Stub 167 implements PendingIntent.OnFinished { 168 private static final String TAG = "ConnectivityService"; 169 170 private static final boolean DBG = true; 171 private static final boolean VDBG = false; 172 173 private static final boolean LOGD_RULES = false; 174 175 // TODO: create better separation between radio types and network types 176 177 // how long to wait before switching back to a radio's default network 178 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 179 // system property that can override the above value 180 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 181 "android.telephony.apn-restore"; 182 183 // How long to wait before putting up a "This network doesn't have an Internet connection, 184 // connect anyway?" dialog after the user selects a network that doesn't validate. 185 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 186 187 // How long to delay to removal of a pending intent based request. 188 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 189 private final int mReleasePendingIntentDelayMs; 190 191 private Tethering mTethering; 192 193 private final PermissionMonitor mPermissionMonitor; 194 195 private KeyStore mKeyStore; 196 197 @GuardedBy("mVpns") 198 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 199 200 private boolean mLockdownEnabled; 201 private LockdownVpnTracker mLockdownTracker; 202 203 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 204 private Object mRulesLock = new Object(); 205 /** Currently active network rules by UID. */ 206 private SparseIntArray mUidRules = new SparseIntArray(); 207 /** Set of ifaces that are costly. */ 208 private HashSet<String> mMeteredIfaces = Sets.newHashSet(); 209 210 final private Context mContext; 211 private int mNetworkPreference; 212 // 0 is full bad, 100 is full good 213 private int mDefaultInetConditionPublished = 0; 214 215 private int mNumDnsEntries; 216 217 private boolean mTestMode; 218 private static ConnectivityService sServiceInstance; 219 220 private INetworkManagementService mNetd; 221 private INetworkStatsService mStatsService; 222 private INetworkPolicyManager mPolicyManager; 223 224 private String mCurrentTcpBufferSizes; 225 226 private static final int ENABLED = 1; 227 private static final int DISABLED = 0; 228 229 private enum ReapUnvalidatedNetworks { 230 // Tear down networks that have no chance (e.g. even if validated) of becoming 231 // the highest scoring network satisfying a NetworkRequest. This should be passed when 232 // all networks have been rematched against all NetworkRequests. 233 REAP, 234 // Don't reap networks. This should be passed when some networks have not yet been 235 // rematched against all NetworkRequests. 236 DONT_REAP 237 }; 238 239 /** 240 * used internally to change our mobile data enabled flag 241 */ 242 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 243 244 /** 245 * used internally to clear a wakelock when transitioning 246 * from one net to another. Clear happens when we get a new 247 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 248 * after a timeout if no network is found (typically 1 min). 249 */ 250 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 251 252 /** 253 * used internally to reload global proxy settings 254 */ 255 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 256 257 /** 258 * used internally to send a sticky broadcast delayed. 259 */ 260 private static final int EVENT_SEND_STICKY_BROADCAST_INTENT = 11; 261 262 /** 263 * PAC manager has received new port. 264 */ 265 private static final int EVENT_PROXY_HAS_CHANGED = 16; 266 267 /** 268 * used internally when registering NetworkFactories 269 * obj = NetworkFactoryInfo 270 */ 271 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 272 273 /** 274 * used internally when registering NetworkAgents 275 * obj = Messenger 276 */ 277 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 278 279 /** 280 * used to add a network request 281 * includes a NetworkRequestInfo 282 */ 283 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 284 285 /** 286 * indicates a timeout period is over - check if we had a network yet or not 287 * and if not, call the timeout calback (but leave the request live until they 288 * cancel it. 289 * includes a NetworkRequestInfo 290 */ 291 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 292 293 /** 294 * used to add a network listener - no request 295 * includes a NetworkRequestInfo 296 */ 297 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 298 299 /** 300 * used to remove a network request, either a listener or a real request 301 * arg1 = UID of caller 302 * obj = NetworkRequest 303 */ 304 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 305 306 /** 307 * used internally when registering NetworkFactories 308 * obj = Messenger 309 */ 310 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 311 312 /** 313 * used internally to expire a wakelock when transitioning 314 * from one net to another. Expire happens when we fail to find 315 * a new network (typically after 1 minute) - 316 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 317 * a replacement network. 318 */ 319 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 320 321 /** 322 * Used internally to indicate the system is ready. 323 */ 324 private static final int EVENT_SYSTEM_READY = 25; 325 326 /** 327 * used to add a network request with a pending intent 328 * obj = NetworkRequestInfo 329 */ 330 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 331 332 /** 333 * used to remove a pending intent and its associated network request. 334 * arg1 = UID of caller 335 * obj = PendingIntent 336 */ 337 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 338 339 /** 340 * used to specify whether a network should be used even if unvalidated. 341 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 342 * arg2 = whether to remember this choice in the future (1 or 0) 343 * obj = network 344 */ 345 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 346 347 /** 348 * used to ask the user to confirm a connection to an unvalidated network. 349 * obj = network 350 */ 351 private static final int EVENT_PROMPT_UNVALIDATED = 29; 352 353 /** 354 * used internally to (re)configure mobile data always-on settings. 355 */ 356 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 357 358 /** 359 * used to add a network listener with a pending intent 360 * obj = NetworkRequestInfo 361 */ 362 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 363 364 /** Handler thread used for both of the handlers below. */ 365 @VisibleForTesting 366 protected final HandlerThread mHandlerThread; 367 /** Handler used for internal events. */ 368 final private InternalHandler mHandler; 369 /** Handler used for incoming {@link NetworkStateTracker} events. */ 370 final private NetworkStateTrackerHandler mTrackerHandler; 371 372 private boolean mSystemReady; 373 private Intent mInitialBroadcast; 374 375 private PowerManager.WakeLock mNetTransitionWakeLock; 376 private String mNetTransitionWakeLockCausedBy = ""; 377 private int mNetTransitionWakeLockSerialNumber; 378 private int mNetTransitionWakeLockTimeout; 379 private final PowerManager.WakeLock mPendingIntentWakeLock; 380 381 private InetAddress mDefaultDns; 382 383 // used in DBG mode to track inet condition reports 384 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 385 private ArrayList mInetLog; 386 387 // track the current default http proxy - tell the world if we get a new one (real change) 388 private volatile ProxyInfo mDefaultProxy = null; 389 private Object mProxyLock = new Object(); 390 private boolean mDefaultProxyDisabled = false; 391 392 // track the global proxy. 393 private ProxyInfo mGlobalProxy = null; 394 395 private PacManager mPacManager = null; 396 397 final private SettingsObserver mSettingsObserver; 398 399 private UserManager mUserManager; 400 401 NetworkConfig[] mNetConfigs; 402 int mNetworksDefined; 403 404 // the set of network types that can only be enabled by system/sig apps 405 List mProtectedNetworks; 406 407 private DataConnectionStats mDataConnectionStats; 408 409 TelephonyManager mTelephonyManager; 410 411 private KeepaliveTracker mKeepaliveTracker; 412 413 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 414 private final static int MIN_NET_ID = 100; // some reserved marks 415 private final static int MAX_NET_ID = 65535; 416 private int mNextNetId = MIN_NET_ID; 417 418 // sequence number of NetworkRequests 419 private int mNextNetworkRequestId = 1; 420 421 // NetworkRequest activity String log entries. 422 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 423 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 424 425 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 426 private static final int MAX_VALIDATION_LOGS = 10; 427 private final ArrayDeque<Pair<Network,ReadOnlyLocalLog>> mValidationLogs = 428 new ArrayDeque<Pair<Network,ReadOnlyLocalLog>>(MAX_VALIDATION_LOGS); 429 430 private void addValidationLogs(ReadOnlyLocalLog log, Network network) { 431 synchronized(mValidationLogs) { 432 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 433 mValidationLogs.removeLast(); 434 } 435 mValidationLogs.addFirst(new Pair(network, log)); 436 } 437 } 438 439 /** 440 * Implements support for the legacy "one network per network type" model. 441 * 442 * We used to have a static array of NetworkStateTrackers, one for each 443 * network type, but that doesn't work any more now that we can have, 444 * for example, more that one wifi network. This class stores all the 445 * NetworkAgentInfo objects that support a given type, but the legacy 446 * API will only see the first one. 447 * 448 * It serves two main purposes: 449 * 450 * 1. Provide information about "the network for a given type" (since this 451 * API only supports one). 452 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 453 * the first network for a given type changes, or if the default network 454 * changes. 455 */ 456 private class LegacyTypeTracker { 457 458 private static final boolean DBG = true; 459 private static final boolean VDBG = false; 460 private static final String TAG = "CSLegacyTypeTracker"; 461 462 /** 463 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 464 * Each list holds references to all NetworkAgentInfos that are used to 465 * satisfy requests for that network type. 466 * 467 * This array is built out at startup such that an unsupported network 468 * doesn't get an ArrayList instance, making this a tristate: 469 * unsupported, supported but not active and active. 470 * 471 * The actual lists are populated when we scan the network types that 472 * are supported on this device. 473 */ 474 private ArrayList<NetworkAgentInfo> mTypeLists[]; 475 476 public LegacyTypeTracker() { 477 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 478 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 479 } 480 481 public void addSupportedType(int type) { 482 if (mTypeLists[type] != null) { 483 throw new IllegalStateException( 484 "legacy list for type " + type + "already initialized"); 485 } 486 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 487 } 488 489 public boolean isTypeSupported(int type) { 490 return isNetworkTypeValid(type) && mTypeLists[type] != null; 491 } 492 493 public NetworkAgentInfo getNetworkForType(int type) { 494 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 495 return mTypeLists[type].get(0); 496 } else { 497 return null; 498 } 499 } 500 501 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 502 boolean isDefaultNetwork) { 503 if (DBG) { 504 log("Sending " + state + 505 " broadcast for type " + type + " " + nai.name() + 506 " isDefaultNetwork=" + isDefaultNetwork); 507 } 508 } 509 510 /** Adds the given network to the specified legacy type list. */ 511 public void add(int type, NetworkAgentInfo nai) { 512 if (!isTypeSupported(type)) { 513 return; // Invalid network type. 514 } 515 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 516 517 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 518 if (list.contains(nai)) { 519 return; 520 } 521 522 list.add(nai); 523 524 // Send a broadcast if this is the first network of its type or if it's the default. 525 final boolean isDefaultNetwork = isDefaultNetwork(nai); 526 if (list.size() == 1 || isDefaultNetwork) { 527 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 528 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 529 } 530 } 531 532 /** Removes the given network from the specified legacy type list. */ 533 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 534 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 535 if (list == null || list.isEmpty()) { 536 return; 537 } 538 539 final boolean wasFirstNetwork = list.get(0).equals(nai); 540 541 if (!list.remove(nai)) { 542 return; 543 } 544 545 final DetailedState state = DetailedState.DISCONNECTED; 546 547 if (wasFirstNetwork || wasDefault) { 548 maybeLogBroadcast(nai, state, type, wasDefault); 549 sendLegacyNetworkBroadcast(nai, state, type); 550 } 551 552 if (!list.isEmpty() && wasFirstNetwork) { 553 if (DBG) log("Other network available for type " + type + 554 ", sending connected broadcast"); 555 final NetworkAgentInfo replacement = list.get(0); 556 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 557 sendLegacyNetworkBroadcast(replacement, state, type); 558 } 559 } 560 561 /** Removes the given network from all legacy type lists. */ 562 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 563 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 564 for (int type = 0; type < mTypeLists.length; type++) { 565 remove(type, nai, wasDefault); 566 } 567 } 568 569 // send out another legacy broadcast - currently only used for suspend/unsuspend 570 // toggle 571 public void update(NetworkAgentInfo nai) { 572 final boolean isDefault = isDefaultNetwork(nai); 573 final DetailedState state = nai.networkInfo.getDetailedState(); 574 for (int type = 0; type < mTypeLists.length; type++) { 575 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 576 final boolean contains = (list != null && list.contains(nai)); 577 final boolean isFirst = (list != null && list.size() > 0 && nai == list.get(0)); 578 if (isFirst || (contains && isDefault)) { 579 maybeLogBroadcast(nai, state, type, isDefault); 580 sendLegacyNetworkBroadcast(nai, state, type); 581 } 582 } 583 } 584 585 private String naiToString(NetworkAgentInfo nai) { 586 String name = (nai != null) ? nai.name() : "null"; 587 String state = (nai.networkInfo != null) ? 588 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 589 "???/???"; 590 return name + " " + state; 591 } 592 593 public void dump(IndentingPrintWriter pw) { 594 pw.println("mLegacyTypeTracker:"); 595 pw.increaseIndent(); 596 pw.print("Supported types:"); 597 for (int type = 0; type < mTypeLists.length; type++) { 598 if (mTypeLists[type] != null) pw.print(" " + type); 599 } 600 pw.println(); 601 pw.println("Current state:"); 602 pw.increaseIndent(); 603 for (int type = 0; type < mTypeLists.length; type++) { 604 if (mTypeLists[type] == null|| mTypeLists[type].size() == 0) continue; 605 for (NetworkAgentInfo nai : mTypeLists[type]) { 606 pw.println(type + " " + naiToString(nai)); 607 } 608 } 609 pw.decreaseIndent(); 610 pw.decreaseIndent(); 611 pw.println(); 612 } 613 614 // This class needs its own log method because it has a different TAG. 615 private void log(String s) { 616 Slog.d(TAG, s); 617 } 618 619 } 620 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 621 622 @VisibleForTesting 623 protected HandlerThread createHandlerThread() { 624 return new HandlerThread("ConnectivityServiceThread"); 625 } 626 627 public ConnectivityService(Context context, INetworkManagementService netManager, 628 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 629 if (DBG) log("ConnectivityService starting up"); 630 631 mDefaultRequest = createInternetRequestForTransport(-1); 632 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, 633 new Binder(), NetworkRequestInfo.REQUEST); 634 mNetworkRequests.put(mDefaultRequest, defaultNRI); 635 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 636 637 mDefaultMobileDataRequest = createInternetRequestForTransport( 638 NetworkCapabilities.TRANSPORT_CELLULAR); 639 640 mHandlerThread = createHandlerThread(); 641 mHandlerThread.start(); 642 mHandler = new InternalHandler(mHandlerThread.getLooper()); 643 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 644 645 // setup our unique device name 646 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 647 String id = Settings.Secure.getString(context.getContentResolver(), 648 Settings.Secure.ANDROID_ID); 649 if (id != null && id.length() > 0) { 650 String name = new String("android-").concat(id); 651 SystemProperties.set("net.hostname", name); 652 } 653 } 654 655 // read our default dns server ip 656 String dns = Settings.Global.getString(context.getContentResolver(), 657 Settings.Global.DEFAULT_DNS_SERVER); 658 if (dns == null || dns.length() == 0) { 659 dns = context.getResources().getString( 660 com.android.internal.R.string.config_default_dns_server); 661 } 662 try { 663 mDefaultDns = NetworkUtils.numericToInetAddress(dns); 664 } catch (IllegalArgumentException e) { 665 loge("Error setting defaultDns using " + dns); 666 } 667 668 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 669 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 670 671 mContext = checkNotNull(context, "missing Context"); 672 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 673 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 674 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 675 mKeyStore = KeyStore.getInstance(); 676 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 677 678 try { 679 mPolicyManager.registerListener(mPolicyListener); 680 } catch (RemoteException e) { 681 // ouch, no rules updates means some processes may never get network 682 loge("unable to register INetworkPolicyListener" + e.toString()); 683 } 684 685 final PowerManager powerManager = (PowerManager) context.getSystemService( 686 Context.POWER_SERVICE); 687 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 688 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 689 com.android.internal.R.integer.config_networkTransitionTimeout); 690 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 691 692 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 693 694 // TODO: What is the "correct" way to do determine if this is a wifi only device? 695 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 696 log("wifiOnly=" + wifiOnly); 697 String[] naStrings = context.getResources().getStringArray( 698 com.android.internal.R.array.networkAttributes); 699 for (String naString : naStrings) { 700 try { 701 NetworkConfig n = new NetworkConfig(naString); 702 if (VDBG) log("naString=" + naString + " config=" + n); 703 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 704 loge("Error in networkAttributes - ignoring attempt to define type " + 705 n.type); 706 continue; 707 } 708 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 709 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 710 n.type); 711 continue; 712 } 713 if (mNetConfigs[n.type] != null) { 714 loge("Error in networkAttributes - ignoring attempt to redefine type " + 715 n.type); 716 continue; 717 } 718 mLegacyTypeTracker.addSupportedType(n.type); 719 720 mNetConfigs[n.type] = n; 721 mNetworksDefined++; 722 } catch(Exception e) { 723 // ignore it - leave the entry null 724 } 725 } 726 727 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 728 if (mNetConfigs[TYPE_VPN] == null) { 729 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 730 // don't need to add TYPE_VPN to mNetConfigs. 731 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 732 mNetworksDefined++; // used only in the log() statement below. 733 } 734 735 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 736 737 mProtectedNetworks = new ArrayList<Integer>(); 738 int[] protectedNetworks = context.getResources().getIntArray( 739 com.android.internal.R.array.config_protectedNetworks); 740 for (int p : protectedNetworks) { 741 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 742 mProtectedNetworks.add(p); 743 } else { 744 if (DBG) loge("Ignoring protectedNetwork " + p); 745 } 746 } 747 748 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 749 && SystemProperties.get("ro.build.type").equals("eng"); 750 751 mTethering = new Tethering(mContext, mNetd, statsService, mHandler.getLooper()); 752 753 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 754 755 //set up the listener for user state for creating user VPNs 756 IntentFilter intentFilter = new IntentFilter(); 757 intentFilter.addAction(Intent.ACTION_USER_STARTING); 758 intentFilter.addAction(Intent.ACTION_USER_STOPPING); 759 intentFilter.addAction(Intent.ACTION_USER_ADDED); 760 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 761 mContext.registerReceiverAsUser( 762 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 763 764 try { 765 mNetd.registerObserver(mTethering); 766 mNetd.registerObserver(mDataActivityObserver); 767 } catch (RemoteException e) { 768 loge("Error registering observer :" + e); 769 } 770 771 if (DBG) { 772 mInetLog = new ArrayList(); 773 } 774 775 mSettingsObserver = new SettingsObserver(mContext, mHandler); 776 registerSettingsCallbacks(); 777 778 mDataConnectionStats = new DataConnectionStats(mContext); 779 mDataConnectionStats.startMonitoring(); 780 781 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 782 783 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 784 785 mKeepaliveTracker = new KeepaliveTracker(mHandler); 786 } 787 788 private NetworkRequest createInternetRequestForTransport(int transportType) { 789 NetworkCapabilities netCap = new NetworkCapabilities(); 790 netCap.addCapability(NET_CAPABILITY_INTERNET); 791 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 792 if (transportType > -1) { 793 netCap.addTransportType(transportType); 794 } 795 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 796 } 797 798 private void handleMobileDataAlwaysOn() { 799 final boolean enable = (Settings.Global.getInt( 800 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 801 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 802 if (enable == isEnabled) { 803 return; // Nothing to do. 804 } 805 806 if (enable) { 807 handleRegisterNetworkRequest(new NetworkRequestInfo( 808 null, mDefaultMobileDataRequest, new Binder(), NetworkRequestInfo.REQUEST)); 809 } else { 810 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 811 } 812 } 813 814 private void registerSettingsCallbacks() { 815 // Watch for global HTTP proxy changes. 816 mSettingsObserver.observe( 817 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 818 EVENT_APPLY_GLOBAL_HTTP_PROXY); 819 820 // Watch for whether or not to keep mobile data always on. 821 mSettingsObserver.observe( 822 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 823 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 824 } 825 826 private synchronized int nextNetworkRequestId() { 827 return mNextNetworkRequestId++; 828 } 829 830 @VisibleForTesting 831 protected int reserveNetId() { 832 synchronized (mNetworkForNetId) { 833 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 834 int netId = mNextNetId; 835 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 836 // Make sure NetID unused. http://b/16815182 837 if (!mNetIdInUse.get(netId)) { 838 mNetIdInUse.put(netId, true); 839 return netId; 840 } 841 } 842 } 843 throw new IllegalStateException("No free netIds"); 844 } 845 846 private NetworkState getFilteredNetworkState(int networkType, int uid) { 847 NetworkInfo info = null; 848 LinkProperties lp = null; 849 NetworkCapabilities nc = null; 850 Network network = null; 851 String subscriberId = null; 852 853 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 854 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 855 if (nai != null) { 856 synchronized (nai) { 857 info = new NetworkInfo(nai.networkInfo); 858 lp = new LinkProperties(nai.linkProperties); 859 nc = new NetworkCapabilities(nai.networkCapabilities); 860 // Network objects are outwardly immutable so there is no point to duplicating. 861 // Duplicating also precludes sharing socket factories and connection pools. 862 network = nai.network; 863 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 864 } 865 info.setType(networkType); 866 } else { 867 info = new NetworkInfo(networkType, 0, getNetworkTypeName(networkType), ""); 868 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 869 info.setIsAvailable(true); 870 lp = new LinkProperties(); 871 nc = new NetworkCapabilities(); 872 network = null; 873 } 874 info = getFilteredNetworkInfo(info, lp, uid); 875 } 876 877 return new NetworkState(info, lp, nc, network, subscriberId, null); 878 } 879 880 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 881 if (network == null) { 882 return null; 883 } 884 synchronized (mNetworkForNetId) { 885 return mNetworkForNetId.get(network.netId); 886 } 887 }; 888 889 private Network[] getVpnUnderlyingNetworks(int uid) { 890 if (!mLockdownEnabled) { 891 int user = UserHandle.getUserId(uid); 892 synchronized (mVpns) { 893 Vpn vpn = mVpns.get(user); 894 if (vpn != null && vpn.appliesToUid(uid)) { 895 return vpn.getUnderlyingNetworks(); 896 } 897 } 898 } 899 return null; 900 } 901 902 private NetworkState getUnfilteredActiveNetworkState(int uid) { 903 NetworkInfo info = null; 904 LinkProperties lp = null; 905 NetworkCapabilities nc = null; 906 Network network = null; 907 String subscriberId = null; 908 909 NetworkAgentInfo nai = getDefaultNetwork(); 910 911 final Network[] networks = getVpnUnderlyingNetworks(uid); 912 if (networks != null) { 913 // getUnderlyingNetworks() returns: 914 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 915 // empty array => the VPN explicitly said "no default network". 916 // non-empty array => the VPN specified one or more default networks; we use the 917 // first one. 918 if (networks.length > 0) { 919 nai = getNetworkAgentInfoForNetwork(networks[0]); 920 } else { 921 nai = null; 922 } 923 } 924 925 if (nai != null) { 926 synchronized (nai) { 927 info = new NetworkInfo(nai.networkInfo); 928 lp = new LinkProperties(nai.linkProperties); 929 nc = new NetworkCapabilities(nai.networkCapabilities); 930 // Network objects are outwardly immutable so there is no point to duplicating. 931 // Duplicating also precludes sharing socket factories and connection pools. 932 network = nai.network; 933 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 934 } 935 } 936 937 return new NetworkState(info, lp, nc, network, subscriberId, null); 938 } 939 940 /** 941 * Check if UID should be blocked from using the network with the given LinkProperties. 942 */ 943 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 944 final boolean networkCostly; 945 final int uidRules; 946 947 final String iface = (lp == null ? "" : lp.getInterfaceName()); 948 synchronized (mRulesLock) { 949 networkCostly = mMeteredIfaces.contains(iface); 950 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 951 } 952 953 if (uidRules == RULE_REJECT_ALL) { 954 return true; 955 } else if ((uidRules == RULE_REJECT_METERED) && networkCostly) { 956 return true; 957 } else { 958 return false; 959 } 960 } 961 962 /** 963 * Return a filtered {@link NetworkInfo}, potentially marked 964 * {@link DetailedState#BLOCKED} based on 965 * {@link #isNetworkWithLinkPropertiesBlocked}. 966 */ 967 private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, LinkProperties lp, int uid) { 968 if (info != null && isNetworkWithLinkPropertiesBlocked(lp, uid)) { 969 // network is blocked; clone and override state 970 info = new NetworkInfo(info); 971 info.setDetailedState(DetailedState.BLOCKED, null, null); 972 if (VDBG) { 973 log("returning Blocked NetworkInfo for ifname=" + 974 lp.getInterfaceName() + ", uid=" + uid); 975 } 976 } 977 if (info != null && mLockdownTracker != null) { 978 info = mLockdownTracker.augmentNetworkInfo(info); 979 if (VDBG) log("returning Locked NetworkInfo"); 980 } 981 return info; 982 } 983 984 /** 985 * Return NetworkInfo for the active (i.e., connected) network interface. 986 * It is assumed that at most one network is active at a time. If more 987 * than one is active, it is indeterminate which will be returned. 988 * @return the info for the active network, or {@code null} if none is 989 * active 990 */ 991 @Override 992 public NetworkInfo getActiveNetworkInfo() { 993 enforceAccessPermission(); 994 final int uid = Binder.getCallingUid(); 995 NetworkState state = getUnfilteredActiveNetworkState(uid); 996 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 997 } 998 999 @Override 1000 public Network getActiveNetwork() { 1001 enforceAccessPermission(); 1002 final int uid = Binder.getCallingUid(); 1003 final int user = UserHandle.getUserId(uid); 1004 int vpnNetId = NETID_UNSET; 1005 synchronized (mVpns) { 1006 final Vpn vpn = mVpns.get(user); 1007 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1008 } 1009 NetworkAgentInfo nai; 1010 if (vpnNetId != NETID_UNSET) { 1011 synchronized (mNetworkForNetId) { 1012 nai = mNetworkForNetId.get(vpnNetId); 1013 } 1014 if (nai != null) return nai.network; 1015 } 1016 nai = getDefaultNetwork(); 1017 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 1018 return nai != null ? nai.network : null; 1019 } 1020 1021 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1022 enforceAccessPermission(); 1023 final int uid = Binder.getCallingUid(); 1024 NetworkState state = getUnfilteredActiveNetworkState(uid); 1025 return state.networkInfo; 1026 } 1027 1028 @Override 1029 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 1030 enforceConnectivityInternalPermission(); 1031 NetworkState state = getUnfilteredActiveNetworkState(uid); 1032 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1033 } 1034 1035 @Override 1036 public NetworkInfo getNetworkInfo(int networkType) { 1037 enforceAccessPermission(); 1038 final int uid = Binder.getCallingUid(); 1039 if (getVpnUnderlyingNetworks(uid) != null) { 1040 // A VPN is active, so we may need to return one of its underlying networks. This 1041 // information is not available in LegacyTypeTracker, so we have to get it from 1042 // getUnfilteredActiveNetworkState. 1043 NetworkState state = getUnfilteredActiveNetworkState(uid); 1044 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1045 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1046 } 1047 } 1048 NetworkState state = getFilteredNetworkState(networkType, uid); 1049 return state.networkInfo; 1050 } 1051 1052 @Override 1053 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1054 enforceAccessPermission(); 1055 final int uid = Binder.getCallingUid(); 1056 NetworkInfo info = null; 1057 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1058 if (nai != null) { 1059 synchronized (nai) { 1060 info = new NetworkInfo(nai.networkInfo); 1061 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1062 } 1063 } 1064 return info; 1065 } 1066 1067 @Override 1068 public NetworkInfo[] getAllNetworkInfo() { 1069 enforceAccessPermission(); 1070 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1071 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1072 networkType++) { 1073 NetworkInfo info = getNetworkInfo(networkType); 1074 if (info != null) { 1075 result.add(info); 1076 } 1077 } 1078 return result.toArray(new NetworkInfo[result.size()]); 1079 } 1080 1081 @Override 1082 public Network getNetworkForType(int networkType) { 1083 enforceAccessPermission(); 1084 final int uid = Binder.getCallingUid(); 1085 NetworkState state = getFilteredNetworkState(networkType, uid); 1086 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1087 return state.network; 1088 } 1089 return null; 1090 } 1091 1092 @Override 1093 public Network[] getAllNetworks() { 1094 enforceAccessPermission(); 1095 synchronized (mNetworkForNetId) { 1096 final Network[] result = new Network[mNetworkForNetId.size()]; 1097 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1098 result[i] = mNetworkForNetId.valueAt(i).network; 1099 } 1100 return result; 1101 } 1102 } 1103 1104 @Override 1105 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1106 // The basic principle is: if an app's traffic could possibly go over a 1107 // network, without the app doing anything multinetwork-specific, 1108 // (hence, by "default"), then include that network's capabilities in 1109 // the array. 1110 // 1111 // In the normal case, app traffic only goes over the system's default 1112 // network connection, so that's the only network returned. 1113 // 1114 // With a VPN in force, some app traffic may go into the VPN, and thus 1115 // over whatever underlying networks the VPN specifies, while other app 1116 // traffic may go over the system default network (e.g.: a split-tunnel 1117 // VPN, or an app disallowed by the VPN), so the set of networks 1118 // returned includes the VPN's underlying networks and the system 1119 // default. 1120 enforceAccessPermission(); 1121 1122 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1123 1124 NetworkAgentInfo nai = getDefaultNetwork(); 1125 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1126 if (nc != null) { 1127 result.put(nai.network, nc); 1128 } 1129 1130 if (!mLockdownEnabled) { 1131 synchronized (mVpns) { 1132 Vpn vpn = mVpns.get(userId); 1133 if (vpn != null) { 1134 Network[] networks = vpn.getUnderlyingNetworks(); 1135 if (networks != null) { 1136 for (Network network : networks) { 1137 nai = getNetworkAgentInfoForNetwork(network); 1138 nc = getNetworkCapabilitiesInternal(nai); 1139 if (nc != null) { 1140 result.put(network, nc); 1141 } 1142 } 1143 } 1144 } 1145 } 1146 } 1147 1148 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1149 out = result.values().toArray(out); 1150 return out; 1151 } 1152 1153 @Override 1154 public boolean isNetworkSupported(int networkType) { 1155 enforceAccessPermission(); 1156 return mLegacyTypeTracker.isTypeSupported(networkType); 1157 } 1158 1159 /** 1160 * Return LinkProperties for the active (i.e., connected) default 1161 * network interface. It is assumed that at most one default network 1162 * is active at a time. If more than one is active, it is indeterminate 1163 * which will be returned. 1164 * @return the ip properties for the active network, or {@code null} if 1165 * none is active 1166 */ 1167 @Override 1168 public LinkProperties getActiveLinkProperties() { 1169 enforceAccessPermission(); 1170 final int uid = Binder.getCallingUid(); 1171 NetworkState state = getUnfilteredActiveNetworkState(uid); 1172 return state.linkProperties; 1173 } 1174 1175 @Override 1176 public LinkProperties getLinkPropertiesForType(int networkType) { 1177 enforceAccessPermission(); 1178 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1179 if (nai != null) { 1180 synchronized (nai) { 1181 return new LinkProperties(nai.linkProperties); 1182 } 1183 } 1184 return null; 1185 } 1186 1187 // TODO - this should be ALL networks 1188 @Override 1189 public LinkProperties getLinkProperties(Network network) { 1190 enforceAccessPermission(); 1191 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1192 if (nai != null) { 1193 synchronized (nai) { 1194 return new LinkProperties(nai.linkProperties); 1195 } 1196 } 1197 return null; 1198 } 1199 1200 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1201 if (nai != null) { 1202 synchronized (nai) { 1203 if (nai.networkCapabilities != null) { 1204 return new NetworkCapabilities(nai.networkCapabilities); 1205 } 1206 } 1207 } 1208 return null; 1209 } 1210 1211 @Override 1212 public NetworkCapabilities getNetworkCapabilities(Network network) { 1213 enforceAccessPermission(); 1214 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1215 } 1216 1217 @Override 1218 public NetworkState[] getAllNetworkState() { 1219 // Require internal since we're handing out IMSI details 1220 enforceConnectivityInternalPermission(); 1221 1222 final ArrayList<NetworkState> result = Lists.newArrayList(); 1223 for (Network network : getAllNetworks()) { 1224 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1225 if (nai != null) { 1226 synchronized (nai) { 1227 final String subscriberId = (nai.networkMisc != null) 1228 ? nai.networkMisc.subscriberId : null; 1229 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1230 nai.networkCapabilities, network, subscriberId, null)); 1231 } 1232 } 1233 } 1234 return result.toArray(new NetworkState[result.size()]); 1235 } 1236 1237 @Override 1238 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1239 enforceAccessPermission(); 1240 final int uid = Binder.getCallingUid(); 1241 final long token = Binder.clearCallingIdentity(); 1242 try { 1243 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1244 if (state.networkInfo != null) { 1245 try { 1246 return mPolicyManager.getNetworkQuotaInfo(state); 1247 } catch (RemoteException e) { 1248 } 1249 } 1250 return null; 1251 } finally { 1252 Binder.restoreCallingIdentity(token); 1253 } 1254 } 1255 1256 @Override 1257 public boolean isActiveNetworkMetered() { 1258 enforceAccessPermission(); 1259 final int uid = Binder.getCallingUid(); 1260 final long token = Binder.clearCallingIdentity(); 1261 try { 1262 return isActiveNetworkMeteredUnchecked(uid); 1263 } finally { 1264 Binder.restoreCallingIdentity(token); 1265 } 1266 } 1267 1268 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1269 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1270 if (state.networkInfo != null) { 1271 try { 1272 return mPolicyManager.isNetworkMetered(state); 1273 } catch (RemoteException e) { 1274 } 1275 } 1276 return false; 1277 } 1278 1279 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1280 @Override 1281 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1282 int deviceType = Integer.parseInt(label); 1283 sendDataActivityBroadcast(deviceType, active, tsNanos); 1284 } 1285 }; 1286 1287 /** 1288 * Ensure that a network route exists to deliver traffic to the specified 1289 * host via the specified network interface. 1290 * @param networkType the type of the network over which traffic to the 1291 * specified host is to be routed 1292 * @param hostAddress the IP address of the host to which the route is 1293 * desired 1294 * @return {@code true} on success, {@code false} on failure 1295 */ 1296 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1297 enforceChangePermission(); 1298 if (mProtectedNetworks.contains(networkType)) { 1299 enforceConnectivityInternalPermission(); 1300 } 1301 1302 InetAddress addr; 1303 try { 1304 addr = InetAddress.getByAddress(hostAddress); 1305 } catch (UnknownHostException e) { 1306 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1307 return false; 1308 } 1309 1310 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1311 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1312 return false; 1313 } 1314 1315 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1316 if (nai == null) { 1317 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1318 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1319 } else { 1320 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1321 } 1322 return false; 1323 } 1324 1325 DetailedState netState; 1326 synchronized (nai) { 1327 netState = nai.networkInfo.getDetailedState(); 1328 } 1329 1330 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1331 if (VDBG) { 1332 log("requestRouteToHostAddress on down network " 1333 + "(" + networkType + ") - dropped" 1334 + " netState=" + netState); 1335 } 1336 return false; 1337 } 1338 1339 final int uid = Binder.getCallingUid(); 1340 final long token = Binder.clearCallingIdentity(); 1341 try { 1342 LinkProperties lp; 1343 int netId; 1344 synchronized (nai) { 1345 lp = nai.linkProperties; 1346 netId = nai.network.netId; 1347 } 1348 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1349 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1350 return ok; 1351 } finally { 1352 Binder.restoreCallingIdentity(token); 1353 } 1354 } 1355 1356 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1357 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1358 if (bestRoute == null) { 1359 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1360 } else { 1361 String iface = bestRoute.getInterface(); 1362 if (bestRoute.getGateway().equals(addr)) { 1363 // if there is no better route, add the implied hostroute for our gateway 1364 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1365 } else { 1366 // if we will connect to this through another route, add a direct route 1367 // to it's gateway 1368 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1369 } 1370 } 1371 if (DBG) log("Adding legacy route " + bestRoute + 1372 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1373 try { 1374 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1375 } catch (Exception e) { 1376 // never crash - catch them all 1377 if (DBG) loge("Exception trying to add a route: " + e); 1378 return false; 1379 } 1380 return true; 1381 } 1382 1383 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1384 @Override 1385 public void onUidRulesChanged(int uid, int uidRules) { 1386 // caller is NPMS, since we only register with them 1387 if (LOGD_RULES) { 1388 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1389 } 1390 1391 synchronized (mRulesLock) { 1392 // skip update when we've already applied rules 1393 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1394 if (oldRules == uidRules) return; 1395 1396 mUidRules.put(uid, uidRules); 1397 } 1398 1399 // TODO: notify UID when it has requested targeted updates 1400 } 1401 1402 @Override 1403 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1404 // caller is NPMS, since we only register with them 1405 if (LOGD_RULES) { 1406 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1407 } 1408 1409 synchronized (mRulesLock) { 1410 mMeteredIfaces.clear(); 1411 for (String iface : meteredIfaces) { 1412 mMeteredIfaces.add(iface); 1413 } 1414 } 1415 } 1416 1417 @Override 1418 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1419 // caller is NPMS, since we only register with them 1420 if (LOGD_RULES) { 1421 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1422 } 1423 } 1424 }; 1425 1426 /** 1427 * Require that the caller is either in the same user or has appropriate permission to interact 1428 * across users. 1429 * 1430 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1431 */ 1432 private void enforceCrossUserPermission(int userId) { 1433 if (userId == UserHandle.getCallingUserId()) { 1434 // Not a cross-user call. 1435 return; 1436 } 1437 mContext.enforceCallingOrSelfPermission( 1438 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1439 "ConnectivityService"); 1440 } 1441 1442 private void enforceInternetPermission() { 1443 mContext.enforceCallingOrSelfPermission( 1444 android.Manifest.permission.INTERNET, 1445 "ConnectivityService"); 1446 } 1447 1448 private void enforceAccessPermission() { 1449 mContext.enforceCallingOrSelfPermission( 1450 android.Manifest.permission.ACCESS_NETWORK_STATE, 1451 "ConnectivityService"); 1452 } 1453 1454 private void enforceChangePermission() { 1455 ConnectivityManager.enforceChangePermission(mContext); 1456 } 1457 1458 private void enforceTetherAccessPermission() { 1459 mContext.enforceCallingOrSelfPermission( 1460 android.Manifest.permission.ACCESS_NETWORK_STATE, 1461 "ConnectivityService"); 1462 } 1463 1464 private void enforceConnectivityInternalPermission() { 1465 mContext.enforceCallingOrSelfPermission( 1466 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1467 "ConnectivityService"); 1468 } 1469 1470 private void enforceKeepalivePermission() { 1471 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1472 } 1473 1474 public void sendConnectedBroadcast(NetworkInfo info) { 1475 enforceConnectivityInternalPermission(); 1476 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1477 } 1478 1479 private void sendInetConditionBroadcast(NetworkInfo info) { 1480 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1481 } 1482 1483 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1484 if (mLockdownTracker != null) { 1485 info = mLockdownTracker.augmentNetworkInfo(info); 1486 } 1487 1488 Intent intent = new Intent(bcastType); 1489 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1490 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1491 if (info.isFailover()) { 1492 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1493 info.setFailover(false); 1494 } 1495 if (info.getReason() != null) { 1496 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1497 } 1498 if (info.getExtraInfo() != null) { 1499 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1500 info.getExtraInfo()); 1501 } 1502 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1503 return intent; 1504 } 1505 1506 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1507 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1508 } 1509 1510 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1511 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1512 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1513 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1514 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1515 final long ident = Binder.clearCallingIdentity(); 1516 try { 1517 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1518 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1519 } finally { 1520 Binder.restoreCallingIdentity(ident); 1521 } 1522 } 1523 1524 private void sendStickyBroadcast(Intent intent) { 1525 synchronized(this) { 1526 if (!mSystemReady) { 1527 mInitialBroadcast = new Intent(intent); 1528 } 1529 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1530 if (DBG) { 1531 log("sendStickyBroadcast: action=" + intent.getAction()); 1532 } 1533 1534 Bundle options = null; 1535 final long ident = Binder.clearCallingIdentity(); 1536 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1537 final NetworkInfo ni = intent.getParcelableExtra( 1538 ConnectivityManager.EXTRA_NETWORK_INFO); 1539 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1540 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1541 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1542 } else { 1543 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1544 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1545 options = opts.toBundle(); 1546 } 1547 final IBatteryStats bs = BatteryStatsService.getService(); 1548 try { 1549 bs.noteConnectivityChanged(intent.getIntExtra( 1550 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1551 ni != null ? ni.getState().toString() : "?"); 1552 } catch (RemoteException e) { 1553 } 1554 } 1555 try { 1556 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1557 } finally { 1558 Binder.restoreCallingIdentity(ident); 1559 } 1560 } 1561 } 1562 1563 void systemReady() { 1564 loadGlobalProxy(); 1565 1566 synchronized(this) { 1567 mSystemReady = true; 1568 if (mInitialBroadcast != null) { 1569 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1570 mInitialBroadcast = null; 1571 } 1572 } 1573 // load the global proxy at startup 1574 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1575 1576 // Try bringing up tracker, but if KeyStore isn't ready yet, wait 1577 // for user to unlock device. 1578 if (!updateLockdownVpn()) { 1579 final IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT); 1580 mContext.registerReceiver(mUserPresentReceiver, filter); 1581 } 1582 1583 // Configure whether mobile data is always on. 1584 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1585 1586 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1587 1588 mPermissionMonitor.startMonitoring(); 1589 } 1590 1591 private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() { 1592 @Override 1593 public void onReceive(Context context, Intent intent) { 1594 // Try creating lockdown tracker, since user present usually means 1595 // unlocked keystore. 1596 if (updateLockdownVpn()) { 1597 mContext.unregisterReceiver(this); 1598 } 1599 } 1600 }; 1601 1602 /** 1603 * Setup data activity tracking for the given network. 1604 * 1605 * Every {@code setupDataActivityTracking} should be paired with a 1606 * {@link #removeDataActivityTracking} for cleanup. 1607 */ 1608 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1609 final String iface = networkAgent.linkProperties.getInterfaceName(); 1610 1611 final int timeout; 1612 int type = ConnectivityManager.TYPE_NONE; 1613 1614 if (networkAgent.networkCapabilities.hasTransport( 1615 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1616 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1617 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1618 10); 1619 type = ConnectivityManager.TYPE_MOBILE; 1620 } else if (networkAgent.networkCapabilities.hasTransport( 1621 NetworkCapabilities.TRANSPORT_WIFI)) { 1622 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1623 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1624 15); 1625 type = ConnectivityManager.TYPE_WIFI; 1626 } else { 1627 // do not track any other networks 1628 timeout = 0; 1629 } 1630 1631 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1632 try { 1633 mNetd.addIdleTimer(iface, timeout, type); 1634 } catch (Exception e) { 1635 // You shall not crash! 1636 loge("Exception in setupDataActivityTracking " + e); 1637 } 1638 } 1639 } 1640 1641 /** 1642 * Remove data activity tracking when network disconnects. 1643 */ 1644 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1645 final String iface = networkAgent.linkProperties.getInterfaceName(); 1646 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1647 1648 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1649 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1650 try { 1651 // the call fails silently if no idletimer setup for this interface 1652 mNetd.removeIdleTimer(iface); 1653 } catch (Exception e) { 1654 loge("Exception in removeDataActivityTracking " + e); 1655 } 1656 } 1657 } 1658 1659 /** 1660 * Reads the network specific MTU size from reources. 1661 * and set it on it's iface. 1662 */ 1663 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1664 final String iface = newLp.getInterfaceName(); 1665 final int mtu = newLp.getMtu(); 1666 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1667 if (VDBG) log("identical MTU - not setting"); 1668 return; 1669 } 1670 1671 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1672 loge("Unexpected mtu value: " + mtu + ", " + iface); 1673 return; 1674 } 1675 1676 // Cannot set MTU without interface name 1677 if (TextUtils.isEmpty(iface)) { 1678 loge("Setting MTU size with null iface."); 1679 return; 1680 } 1681 1682 try { 1683 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1684 mNetd.setMtu(iface, mtu); 1685 } catch (Exception e) { 1686 Slog.e(TAG, "exception in setMtu()" + e); 1687 } 1688 } 1689 1690 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1691 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1692 1693 // Overridden for testing purposes to avoid writing to SystemProperties. 1694 @VisibleForTesting 1695 protected int getDefaultTcpRwnd() { 1696 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1697 } 1698 1699 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1700 if (isDefaultNetwork(nai) == false) { 1701 return; 1702 } 1703 1704 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1705 String[] values = null; 1706 if (tcpBufferSizes != null) { 1707 values = tcpBufferSizes.split(","); 1708 } 1709 1710 if (values == null || values.length != 6) { 1711 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1712 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1713 values = tcpBufferSizes.split(","); 1714 } 1715 1716 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1717 1718 try { 1719 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1720 1721 final String prefix = "/sys/kernel/ipv4/tcp_"; 1722 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1723 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1724 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1725 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1726 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1727 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1728 mCurrentTcpBufferSizes = tcpBufferSizes; 1729 } catch (IOException e) { 1730 loge("Can't set TCP buffer sizes:" + e); 1731 } 1732 1733 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1734 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1735 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1736 if (rwndValue != 0) { 1737 SystemProperties.set(sysctlKey, rwndValue.toString()); 1738 } 1739 } 1740 1741 private void flushVmDnsCache() { 1742 /* 1743 * Tell the VMs to toss their DNS caches 1744 */ 1745 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1746 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1747 /* 1748 * Connectivity events can happen before boot has completed ... 1749 */ 1750 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1751 final long ident = Binder.clearCallingIdentity(); 1752 try { 1753 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1754 } finally { 1755 Binder.restoreCallingIdentity(ident); 1756 } 1757 } 1758 1759 @Override 1760 public int getRestoreDefaultNetworkDelay(int networkType) { 1761 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1762 NETWORK_RESTORE_DELAY_PROP_NAME); 1763 if(restoreDefaultNetworkDelayStr != null && 1764 restoreDefaultNetworkDelayStr.length() != 0) { 1765 try { 1766 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1767 } catch (NumberFormatException e) { 1768 } 1769 } 1770 // if the system property isn't set, use the value for the apn type 1771 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1772 1773 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1774 (mNetConfigs[networkType] != null)) { 1775 ret = mNetConfigs[networkType].restoreTime; 1776 } 1777 return ret; 1778 } 1779 1780 private boolean argsContain(String[] args, String target) { 1781 for (String arg : args) { 1782 if (arg.equals(target)) return true; 1783 } 1784 return false; 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 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1800 if (argsContain(args, "--diag")) { 1801 final long DIAG_TIME_MS = 5000; 1802 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1803 // Start gathering diagnostic information. 1804 netDiags.add(new NetworkDiagnostics( 1805 nai.network, 1806 new LinkProperties(nai.linkProperties), // Must be a copy. 1807 DIAG_TIME_MS)); 1808 } 1809 1810 for (NetworkDiagnostics netDiag : netDiags) { 1811 pw.println(); 1812 netDiag.waitForMeasurements(); 1813 netDiag.dump(pw); 1814 } 1815 1816 return; 1817 } 1818 1819 pw.print("NetworkFactories for:"); 1820 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1821 pw.print(" " + nfi.name); 1822 } 1823 pw.println(); 1824 pw.println(); 1825 1826 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1827 pw.print("Active default network: "); 1828 if (defaultNai == null) { 1829 pw.println("none"); 1830 } else { 1831 pw.println(defaultNai.network.netId); 1832 } 1833 pw.println(); 1834 1835 pw.println("Current Networks:"); 1836 pw.increaseIndent(); 1837 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1838 pw.println(nai.toString()); 1839 pw.increaseIndent(); 1840 pw.println("Requests:"); 1841 pw.increaseIndent(); 1842 for (int i = 0; i < nai.networkRequests.size(); i++) { 1843 pw.println(nai.networkRequests.valueAt(i).toString()); 1844 } 1845 pw.decreaseIndent(); 1846 pw.println("Lingered:"); 1847 pw.increaseIndent(); 1848 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1849 pw.decreaseIndent(); 1850 pw.decreaseIndent(); 1851 } 1852 pw.decreaseIndent(); 1853 pw.println(); 1854 1855 pw.println("Network Requests:"); 1856 pw.increaseIndent(); 1857 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1858 pw.println(nri.toString()); 1859 } 1860 pw.println(); 1861 pw.decreaseIndent(); 1862 1863 mLegacyTypeTracker.dump(pw); 1864 1865 synchronized (this) { 1866 pw.print("mNetTransitionWakeLock: currently " + 1867 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1868 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1869 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1870 } else { 1871 pw.println(", last requested never"); 1872 } 1873 } 1874 1875 pw.println(); 1876 mTethering.dump(fd, pw, args); 1877 1878 pw.println(); 1879 mKeepaliveTracker.dump(pw); 1880 1881 if (mInetLog != null && mInetLog.size() > 0) { 1882 pw.println(); 1883 pw.println("Inet condition reports:"); 1884 pw.increaseIndent(); 1885 for(int i = 0; i < mInetLog.size(); i++) { 1886 pw.println(mInetLog.get(i)); 1887 } 1888 pw.decreaseIndent(); 1889 } 1890 1891 if (argsContain(args, "--short") == false) { 1892 pw.println(); 1893 synchronized (mValidationLogs) { 1894 pw.println("mValidationLogs (most recent first):"); 1895 for (Pair<Network,ReadOnlyLocalLog> p : mValidationLogs) { 1896 pw.println(p.first); 1897 pw.increaseIndent(); 1898 p.second.dump(fd, pw, args); 1899 pw.decreaseIndent(); 1900 } 1901 } 1902 1903 pw.println(); 1904 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1905 pw.increaseIndent(); 1906 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1907 pw.decreaseIndent(); 1908 } 1909 } 1910 1911 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, String msg) { 1912 if (nai.network == null) return false; 1913 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1914 if (officialNai != null && officialNai.equals(nai)) return true; 1915 if (officialNai != null || VDBG) { 1916 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1917 " - " + nai); 1918 } 1919 return false; 1920 } 1921 1922 private boolean isRequest(NetworkRequest request) { 1923 return mNetworkRequests.get(request).isRequest; 1924 } 1925 1926 // must be stateless - things change under us. 1927 private class NetworkStateTrackerHandler extends Handler { 1928 public NetworkStateTrackerHandler(Looper looper) { 1929 super(looper); 1930 } 1931 1932 @Override 1933 public void handleMessage(Message msg) { 1934 NetworkInfo info; 1935 switch (msg.what) { 1936 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1937 handleAsyncChannelHalfConnect(msg); 1938 break; 1939 } 1940 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1941 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1942 if (nai != null) nai.asyncChannel.disconnect(); 1943 break; 1944 } 1945 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1946 handleAsyncChannelDisconnected(msg); 1947 break; 1948 } 1949 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1950 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1951 if (nai == null) { 1952 loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent"); 1953 } else { 1954 final NetworkCapabilities networkCapabilities = 1955 (NetworkCapabilities)msg.obj; 1956 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 1957 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 1958 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 1959 } 1960 if (nai.created && !nai.networkCapabilities.equalImmutableCapabilities( 1961 networkCapabilities)) { 1962 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 1963 + nai.networkCapabilities + " -> " + networkCapabilities); 1964 } 1965 updateCapabilities(nai, networkCapabilities); 1966 } 1967 break; 1968 } 1969 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1970 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1971 if (nai == null) { 1972 loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED"); 1973 } else { 1974 if (VDBG) { 1975 log("Update of LinkProperties for " + nai.name() + 1976 "; created=" + nai.created); 1977 } 1978 LinkProperties oldLp = nai.linkProperties; 1979 synchronized (nai) { 1980 nai.linkProperties = (LinkProperties)msg.obj; 1981 } 1982 if (nai.created) updateLinkProperties(nai, oldLp); 1983 } 1984 break; 1985 } 1986 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1987 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1988 if (nai == null) { 1989 loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent"); 1990 break; 1991 } 1992 info = (NetworkInfo) msg.obj; 1993 updateNetworkInfo(nai, info); 1994 break; 1995 } 1996 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1997 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1998 if (nai == null) { 1999 loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent"); 2000 break; 2001 } 2002 Integer score = (Integer) msg.obj; 2003 if (score != null) updateNetworkScore(nai, score.intValue()); 2004 break; 2005 } 2006 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2007 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2008 if (nai == null) { 2009 loge("EVENT_UID_RANGES_ADDED from unknown NetworkAgent"); 2010 break; 2011 } 2012 try { 2013 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2014 } catch (Exception e) { 2015 // Never crash! 2016 loge("Exception in addVpnUidRanges: " + e); 2017 } 2018 break; 2019 } 2020 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2021 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2022 if (nai == null) { 2023 loge("EVENT_UID_RANGES_REMOVED from unknown NetworkAgent"); 2024 break; 2025 } 2026 try { 2027 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2028 } catch (Exception e) { 2029 // Never crash! 2030 loge("Exception in removeVpnUidRanges: " + e); 2031 } 2032 break; 2033 } 2034 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2035 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2036 if (nai == null) { 2037 loge("EVENT_SET_EXPLICITLY_SELECTED from unknown NetworkAgent"); 2038 break; 2039 } 2040 if (nai.created && !nai.networkMisc.explicitlySelected) { 2041 loge("ERROR: created network explicitly selected."); 2042 } 2043 nai.networkMisc.explicitlySelected = true; 2044 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2045 break; 2046 } 2047 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2048 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2049 if (nai == null) { 2050 loge("EVENT_PACKET_KEEPALIVE from unknown NetworkAgent"); 2051 break; 2052 } 2053 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2054 break; 2055 } 2056 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2057 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2058 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_TESTED")) { 2059 final boolean valid = 2060 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2061 if (DBG) log(nai.name() + " validation " + (valid ? " passed" : "failed")); 2062 if (valid != nai.lastValidated) { 2063 final int oldScore = nai.getCurrentScore(); 2064 nai.lastValidated = valid; 2065 nai.everValidated |= valid; 2066 updateCapabilities(nai, nai.networkCapabilities); 2067 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2068 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2069 } 2070 updateInetCondition(nai); 2071 // Let the NetworkAgent know the state of its network 2072 nai.asyncChannel.sendMessage( 2073 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2074 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2075 0, null); 2076 } 2077 break; 2078 } 2079 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 2080 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2081 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_LINGER_COMPLETE")) { 2082 handleLingerComplete(nai); 2083 } 2084 break; 2085 } 2086 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2087 final int netId = msg.arg2; 2088 final boolean visible = (msg.arg1 != 0); 2089 final NetworkAgentInfo nai; 2090 synchronized (mNetworkForNetId) { 2091 nai = mNetworkForNetId.get(netId); 2092 } 2093 // If captive portal status has changed, update capabilities. 2094 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2095 nai.lastCaptivePortalDetected = visible; 2096 nai.everCaptivePortalDetected |= visible; 2097 updateCapabilities(nai, nai.networkCapabilities); 2098 } 2099 if (!visible) { 2100 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2101 } else { 2102 if (nai == null) { 2103 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2104 break; 2105 } 2106 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2107 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2108 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2109 } 2110 break; 2111 } 2112 } 2113 } 2114 } 2115 2116 private void linger(NetworkAgentInfo nai) { 2117 nai.lingering = true; 2118 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 2119 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 2120 } 2121 2122 // Cancel any lingering so the linger timeout doesn't teardown a network. 2123 // This should be called when a network begins satisfying a NetworkRequest. 2124 // Note: depending on what state the NetworkMonitor is in (e.g., 2125 // if it's awaiting captive portal login, or if validation failed), this 2126 // may trigger a re-evaluation of the network. 2127 private void unlinger(NetworkAgentInfo nai) { 2128 nai.networkLingered.clear(); 2129 if (!nai.lingering) return; 2130 nai.lingering = false; 2131 if (VDBG) log("Canceling linger of " + nai.name()); 2132 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2133 } 2134 2135 private void handleAsyncChannelHalfConnect(Message msg) { 2136 AsyncChannel ac = (AsyncChannel) msg.obj; 2137 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2138 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2139 if (VDBG) log("NetworkFactory connected"); 2140 // A network factory has connected. Send it all current NetworkRequests. 2141 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2142 if (nri.isRequest == false) continue; 2143 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2144 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2145 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2146 } 2147 } else { 2148 loge("Error connecting NetworkFactory"); 2149 mNetworkFactoryInfos.remove(msg.obj); 2150 } 2151 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2152 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2153 if (VDBG) log("NetworkAgent connected"); 2154 // A network agent has requested a connection. Establish the connection. 2155 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2156 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2157 } else { 2158 loge("Error connecting NetworkAgent"); 2159 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2160 if (nai != null) { 2161 final boolean wasDefault = isDefaultNetwork(nai); 2162 synchronized (mNetworkForNetId) { 2163 mNetworkForNetId.remove(nai.network.netId); 2164 mNetIdInUse.delete(nai.network.netId); 2165 } 2166 // Just in case. 2167 mLegacyTypeTracker.remove(nai, wasDefault); 2168 } 2169 } 2170 } 2171 } 2172 2173 private void handleAsyncChannelDisconnected(Message msg) { 2174 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2175 if (nai != null) { 2176 if (DBG) { 2177 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2178 } 2179 // A network agent has disconnected. 2180 // TODO - if we move the logic to the network agent (have them disconnect 2181 // because they lost all their requests or because their score isn't good) 2182 // then they would disconnect organically, report their new state and then 2183 // disconnect the channel. 2184 if (nai.networkInfo.isConnected()) { 2185 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2186 null, null); 2187 } 2188 final boolean wasDefault = isDefaultNetwork(nai); 2189 if (wasDefault) { 2190 mDefaultInetConditionPublished = 0; 2191 } 2192 notifyIfacesChanged(); 2193 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2194 // by other networks that are already connected. Perhaps that can be done by 2195 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2196 // of rematchAllNetworksAndRequests 2197 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2198 mKeepaliveTracker.handleStopAllKeepalives(nai, 2199 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2200 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2201 mNetworkAgentInfos.remove(msg.replyTo); 2202 updateClat(null, nai.linkProperties, nai); 2203 synchronized (mNetworkForNetId) { 2204 // Remove the NetworkAgent, but don't mark the netId as 2205 // available until we've told netd to delete it below. 2206 mNetworkForNetId.remove(nai.network.netId); 2207 } 2208 // Remove all previously satisfied requests. 2209 for (int i = 0; i < nai.networkRequests.size(); i++) { 2210 NetworkRequest request = nai.networkRequests.valueAt(i); 2211 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2212 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2213 mNetworkForRequestId.remove(request.requestId); 2214 sendUpdatedScoreToFactories(request, 0); 2215 } 2216 } 2217 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2218 removeDataActivityTracking(nai); 2219 notifyLockdownVpn(nai); 2220 requestNetworkTransitionWakelock(nai.name()); 2221 } 2222 mLegacyTypeTracker.remove(nai, wasDefault); 2223 rematchAllNetworksAndRequests(null, 0); 2224 if (nai.created) { 2225 // Tell netd to clean up the configuration for this network 2226 // (routing rules, DNS, etc). 2227 // This may be slow as it requires a lot of netd shelling out to ip and 2228 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2229 // after we've rematched networks with requests which should make a potential 2230 // fallback network the default or requested a new network from the 2231 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2232 // long time. 2233 try { 2234 mNetd.removeNetwork(nai.network.netId); 2235 } catch (Exception e) { 2236 loge("Exception removing network: " + e); 2237 } 2238 } 2239 synchronized (mNetworkForNetId) { 2240 mNetIdInUse.delete(nai.network.netId); 2241 } 2242 } else { 2243 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2244 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2245 } 2246 } 2247 2248 // If this method proves to be too slow then we can maintain a separate 2249 // pendingIntent => NetworkRequestInfo map. 2250 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2251 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2252 Intent intent = pendingIntent.getIntent(); 2253 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2254 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2255 if (existingPendingIntent != null && 2256 existingPendingIntent.getIntent().filterEquals(intent)) { 2257 return entry.getValue(); 2258 } 2259 } 2260 return null; 2261 } 2262 2263 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2264 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2265 2266 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2267 if (existingRequest != null) { // remove the existing request. 2268 if (DBG) log("Replacing " + existingRequest.request + " with " 2269 + nri.request + " because their intents matched."); 2270 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2271 } 2272 handleRegisterNetworkRequest(nri); 2273 } 2274 2275 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2276 mNetworkRequests.put(nri.request, nri); 2277 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2278 if (!nri.isRequest) { 2279 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2280 if (nri.request.networkCapabilities.hasSignalStrength() && 2281 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2282 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2283 } 2284 } 2285 } 2286 rematchAllNetworksAndRequests(null, 0); 2287 if (nri.isRequest && mNetworkForRequestId.get(nri.request.requestId) == null) { 2288 sendUpdatedScoreToFactories(nri.request, 0); 2289 } 2290 } 2291 2292 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2293 int callingUid) { 2294 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2295 if (nri != null) { 2296 handleReleaseNetworkRequest(nri.request, callingUid); 2297 } 2298 } 2299 2300 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2301 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2302 // would it have a chance of satisfying any NetworkRequests. 2303 private boolean unneeded(NetworkAgentInfo nai) { 2304 if (!nai.created || nai.isVPN() || nai.lingering) return false; 2305 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2306 // If this Network is already the highest scoring Network for a request, or if 2307 // there is hope for it to become one if it validated, then it is needed. 2308 if (nri.isRequest && nai.satisfies(nri.request) && 2309 (nai.networkRequests.get(nri.request.requestId) != null || 2310 // Note that this catches two important cases: 2311 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2312 // is currently satisfying the request. This is desirable when 2313 // cellular ends up validating but WiFi does not. 2314 // 2. Unvalidated WiFi will not be reaped when validated cellular 2315 // is currently satisfying the request. This is desirable when 2316 // WiFi ends up validating and out scoring cellular. 2317 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2318 nai.getCurrentScoreAsValidated())) { 2319 return false; 2320 } 2321 } 2322 return true; 2323 } 2324 2325 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2326 NetworkRequestInfo nri = mNetworkRequests.get(request); 2327 if (nri != null) { 2328 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2329 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2330 return; 2331 } 2332 if (DBG) log("releasing NetworkRequest " + request); 2333 nri.unlinkDeathRecipient(); 2334 mNetworkRequests.remove(request); 2335 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2336 if (nri.isRequest) { 2337 // Find all networks that are satisfying this request and remove the request 2338 // from their request lists. 2339 // TODO - it's my understanding that for a request there is only a single 2340 // network satisfying it, so this loop is wasteful 2341 boolean wasKept = false; 2342 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2343 if (nai.networkRequests.get(nri.request.requestId) != null) { 2344 nai.networkRequests.remove(nri.request.requestId); 2345 if (DBG) { 2346 log(" Removing from current network " + nai.name() + 2347 ", leaving " + nai.networkRequests.size() + 2348 " requests."); 2349 } 2350 if (unneeded(nai)) { 2351 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2352 teardownUnneededNetwork(nai); 2353 } else { 2354 // suspect there should only be one pass through here 2355 // but if any were kept do the check below 2356 wasKept |= true; 2357 } 2358 } 2359 } 2360 2361 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2362 if (nai != null) { 2363 mNetworkForRequestId.remove(nri.request.requestId); 2364 } 2365 // Maintain the illusion. When this request arrived, we might have pretended 2366 // that a network connected to serve it, even though the network was already 2367 // connected. Now that this request has gone away, we might have to pretend 2368 // that the network disconnected. LegacyTypeTracker will generate that 2369 // phantom disconnect for this type. 2370 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2371 boolean doRemove = true; 2372 if (wasKept) { 2373 // check if any of the remaining requests for this network are for the 2374 // same legacy type - if so, don't remove the nai 2375 for (int i = 0; i < nai.networkRequests.size(); i++) { 2376 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2377 if (otherRequest.legacyType == nri.request.legacyType && 2378 isRequest(otherRequest)) { 2379 if (DBG) log(" still have other legacy request - leaving"); 2380 doRemove = false; 2381 } 2382 } 2383 } 2384 2385 if (doRemove) { 2386 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2387 } 2388 } 2389 2390 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2391 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2392 nri.request); 2393 } 2394 } else { 2395 // listens don't have a singular affectedNetwork. Check all networks to see 2396 // if this listen request applies and remove it. 2397 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2398 nai.networkRequests.remove(nri.request.requestId); 2399 if (nri.request.networkCapabilities.hasSignalStrength() && 2400 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2401 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2402 } 2403 } 2404 } 2405 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2406 } 2407 } 2408 2409 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2410 enforceConnectivityInternalPermission(); 2411 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2412 accept ? 1 : 0, always ? 1: 0, network)); 2413 } 2414 2415 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2416 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2417 " accept=" + accept + " always=" + always); 2418 2419 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2420 if (nai == null) { 2421 // Nothing to do. 2422 return; 2423 } 2424 2425 if (nai.everValidated) { 2426 // The network validated while the dialog box was up. Take no action. 2427 return; 2428 } 2429 2430 if (!nai.networkMisc.explicitlySelected) { 2431 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2432 } 2433 2434 if (accept != nai.networkMisc.acceptUnvalidated) { 2435 int oldScore = nai.getCurrentScore(); 2436 nai.networkMisc.acceptUnvalidated = accept; 2437 rematchAllNetworksAndRequests(nai, oldScore); 2438 sendUpdatedScoreToFactories(nai); 2439 } 2440 2441 if (always) { 2442 nai.asyncChannel.sendMessage( 2443 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2444 } 2445 2446 if (!accept) { 2447 // Tell the NetworkAgent to not automatically reconnect to the network. 2448 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2449 // Teardown the nework. 2450 teardownUnneededNetwork(nai); 2451 } 2452 2453 } 2454 2455 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2456 if (DBG) log("scheduleUnvalidatedPrompt " + nai.network); 2457 mHandler.sendMessageDelayed( 2458 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2459 PROMPT_UNVALIDATED_DELAY_MS); 2460 } 2461 2462 private void handlePromptUnvalidated(Network network) { 2463 if (DBG) log("handlePromptUnvalidated " + network); 2464 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2465 2466 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2467 // we haven't already been told to switch to it regardless of whether it validated or not. 2468 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2469 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2470 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2471 return; 2472 } 2473 2474 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2475 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2476 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2477 intent.setClassName("com.android.settings", 2478 "com.android.settings.wifi.WifiNoInternetDialog"); 2479 2480 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2481 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2482 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2483 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2484 } 2485 2486 private class InternalHandler extends Handler { 2487 public InternalHandler(Looper looper) { 2488 super(looper); 2489 } 2490 2491 @Override 2492 public void handleMessage(Message msg) { 2493 switch (msg.what) { 2494 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2495 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2496 String causedBy = null; 2497 synchronized (ConnectivityService.this) { 2498 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2499 mNetTransitionWakeLock.isHeld()) { 2500 mNetTransitionWakeLock.release(); 2501 causedBy = mNetTransitionWakeLockCausedBy; 2502 } else { 2503 break; 2504 } 2505 } 2506 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2507 log("Failed to find a new network - expiring NetTransition Wakelock"); 2508 } else { 2509 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2510 " cleared because we found a replacement network"); 2511 } 2512 break; 2513 } 2514 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2515 handleDeprecatedGlobalHttpProxy(); 2516 break; 2517 } 2518 case EVENT_SEND_STICKY_BROADCAST_INTENT: { 2519 Intent intent = (Intent)msg.obj; 2520 sendStickyBroadcast(intent); 2521 break; 2522 } 2523 case EVENT_PROXY_HAS_CHANGED: { 2524 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2525 break; 2526 } 2527 case EVENT_REGISTER_NETWORK_FACTORY: { 2528 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2529 break; 2530 } 2531 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2532 handleUnregisterNetworkFactory((Messenger)msg.obj); 2533 break; 2534 } 2535 case EVENT_REGISTER_NETWORK_AGENT: { 2536 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2537 break; 2538 } 2539 case EVENT_REGISTER_NETWORK_REQUEST: 2540 case EVENT_REGISTER_NETWORK_LISTENER: { 2541 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2542 break; 2543 } 2544 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2545 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2546 handleRegisterNetworkRequestWithIntent(msg); 2547 break; 2548 } 2549 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2550 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2551 break; 2552 } 2553 case EVENT_RELEASE_NETWORK_REQUEST: { 2554 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2555 break; 2556 } 2557 case EVENT_SET_ACCEPT_UNVALIDATED: { 2558 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2559 break; 2560 } 2561 case EVENT_PROMPT_UNVALIDATED: { 2562 handlePromptUnvalidated((Network) msg.obj); 2563 break; 2564 } 2565 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2566 handleMobileDataAlwaysOn(); 2567 break; 2568 } 2569 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2570 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2571 mKeepaliveTracker.handleStartKeepalive(msg); 2572 break; 2573 } 2574 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2575 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2576 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2577 int slot = msg.arg1; 2578 int reason = msg.arg2; 2579 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2580 break; 2581 } 2582 case EVENT_SYSTEM_READY: { 2583 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2584 nai.networkMonitor.systemReady = true; 2585 } 2586 break; 2587 } 2588 } 2589 } 2590 } 2591 2592 // javadoc from interface 2593 public int tether(String iface) { 2594 ConnectivityManager.enforceTetherChangePermission(mContext); 2595 if (isTetheringSupported()) { 2596 return mTethering.tether(iface); 2597 } else { 2598 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2599 } 2600 } 2601 2602 // javadoc from interface 2603 public int untether(String iface) { 2604 ConnectivityManager.enforceTetherChangePermission(mContext); 2605 2606 if (isTetheringSupported()) { 2607 return mTethering.untether(iface); 2608 } else { 2609 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2610 } 2611 } 2612 2613 // javadoc from interface 2614 public int getLastTetherError(String iface) { 2615 enforceTetherAccessPermission(); 2616 2617 if (isTetheringSupported()) { 2618 return mTethering.getLastTetherError(iface); 2619 } else { 2620 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2621 } 2622 } 2623 2624 // TODO - proper iface API for selection by property, inspection, etc 2625 public String[] getTetherableUsbRegexs() { 2626 enforceTetherAccessPermission(); 2627 if (isTetheringSupported()) { 2628 return mTethering.getTetherableUsbRegexs(); 2629 } else { 2630 return new String[0]; 2631 } 2632 } 2633 2634 public String[] getTetherableWifiRegexs() { 2635 enforceTetherAccessPermission(); 2636 if (isTetheringSupported()) { 2637 return mTethering.getTetherableWifiRegexs(); 2638 } else { 2639 return new String[0]; 2640 } 2641 } 2642 2643 public String[] getTetherableBluetoothRegexs() { 2644 enforceTetherAccessPermission(); 2645 if (isTetheringSupported()) { 2646 return mTethering.getTetherableBluetoothRegexs(); 2647 } else { 2648 return new String[0]; 2649 } 2650 } 2651 2652 public int setUsbTethering(boolean enable) { 2653 ConnectivityManager.enforceTetherChangePermission(mContext); 2654 if (isTetheringSupported()) { 2655 return mTethering.setUsbTethering(enable); 2656 } else { 2657 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2658 } 2659 } 2660 2661 // TODO - move iface listing, queries, etc to new module 2662 // javadoc from interface 2663 public String[] getTetherableIfaces() { 2664 enforceTetherAccessPermission(); 2665 return mTethering.getTetherableIfaces(); 2666 } 2667 2668 public String[] getTetheredIfaces() { 2669 enforceTetherAccessPermission(); 2670 return mTethering.getTetheredIfaces(); 2671 } 2672 2673 public String[] getTetheringErroredIfaces() { 2674 enforceTetherAccessPermission(); 2675 return mTethering.getErroredIfaces(); 2676 } 2677 2678 public String[] getTetheredDhcpRanges() { 2679 enforceConnectivityInternalPermission(); 2680 return mTethering.getTetheredDhcpRanges(); 2681 } 2682 2683 // if ro.tether.denied = true we default to no tethering 2684 // gservices could set the secure setting to 1 though to enable it on a build where it 2685 // had previously been turned off. 2686 public boolean isTetheringSupported() { 2687 enforceTetherAccessPermission(); 2688 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2689 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2690 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2691 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2692 return tetherEnabledInSettings && ((mTethering.getTetherableUsbRegexs().length != 0 || 2693 mTethering.getTetherableWifiRegexs().length != 0 || 2694 mTethering.getTetherableBluetoothRegexs().length != 0) && 2695 mTethering.getUpstreamIfaceTypes().length != 0); 2696 } 2697 2698 // Called when we lose the default network and have no replacement yet. 2699 // This will automatically be cleared after X seconds or a new default network 2700 // becomes CONNECTED, whichever happens first. The timer is started by the 2701 // first caller and not restarted by subsequent callers. 2702 private void requestNetworkTransitionWakelock(String forWhom) { 2703 int serialNum = 0; 2704 synchronized (this) { 2705 if (mNetTransitionWakeLock.isHeld()) return; 2706 serialNum = ++mNetTransitionWakeLockSerialNumber; 2707 mNetTransitionWakeLock.acquire(); 2708 mNetTransitionWakeLockCausedBy = forWhom; 2709 } 2710 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2711 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2712 mNetTransitionWakeLockTimeout); 2713 return; 2714 } 2715 2716 // 100 percent is full good, 0 is full bad. 2717 public void reportInetCondition(int networkType, int percentage) { 2718 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2719 if (nai == null) return; 2720 reportNetworkConnectivity(nai.network, percentage > 50); 2721 } 2722 2723 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2724 enforceAccessPermission(); 2725 enforceInternetPermission(); 2726 2727 NetworkAgentInfo nai; 2728 if (network == null) { 2729 nai = getDefaultNetwork(); 2730 } else { 2731 nai = getNetworkAgentInfoForNetwork(network); 2732 } 2733 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2734 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2735 return; 2736 } 2737 // Revalidate if the app report does not match our current validated state. 2738 if (hasConnectivity == nai.lastValidated) return; 2739 final int uid = Binder.getCallingUid(); 2740 if (DBG) { 2741 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2742 ") by " + uid); 2743 } 2744 synchronized (nai) { 2745 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2746 // which isn't meant to work on uncreated networks. 2747 if (!nai.created) return; 2748 2749 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2750 2751 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2752 } 2753 } 2754 2755 private ProxyInfo getDefaultProxy() { 2756 // this information is already available as a world read/writable jvm property 2757 // so this API change wouldn't have a benifit. It also breaks the passing 2758 // of proxy info to all the JVMs. 2759 // enforceAccessPermission(); 2760 synchronized (mProxyLock) { 2761 ProxyInfo ret = mGlobalProxy; 2762 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2763 return ret; 2764 } 2765 } 2766 2767 public ProxyInfo getProxyForNetwork(Network network) { 2768 if (network == null) return getDefaultProxy(); 2769 final ProxyInfo globalProxy = getGlobalProxy(); 2770 if (globalProxy != null) return globalProxy; 2771 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 2772 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 2773 // caller may not have. 2774 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2775 if (nai == null) return null; 2776 synchronized (nai) { 2777 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 2778 if (proxyInfo == null) return null; 2779 return new ProxyInfo(proxyInfo); 2780 } 2781 } 2782 2783 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2784 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2785 // proxy is null then there is no proxy in place). 2786 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2787 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2788 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2789 proxy = null; 2790 } 2791 return proxy; 2792 } 2793 2794 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2795 // better for determining if a new proxy broadcast is necessary: 2796 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2797 // avoid unnecessary broadcasts. 2798 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2799 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2800 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2801 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2802 // all set. 2803 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2804 a = canonicalizeProxyInfo(a); 2805 b = canonicalizeProxyInfo(b); 2806 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2807 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2808 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2809 } 2810 2811 public void setGlobalProxy(ProxyInfo proxyProperties) { 2812 enforceConnectivityInternalPermission(); 2813 2814 synchronized (mProxyLock) { 2815 if (proxyProperties == mGlobalProxy) return; 2816 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2817 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2818 2819 String host = ""; 2820 int port = 0; 2821 String exclList = ""; 2822 String pacFileUrl = ""; 2823 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2824 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2825 if (!proxyProperties.isValid()) { 2826 if (DBG) 2827 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2828 return; 2829 } 2830 mGlobalProxy = new ProxyInfo(proxyProperties); 2831 host = mGlobalProxy.getHost(); 2832 port = mGlobalProxy.getPort(); 2833 exclList = mGlobalProxy.getExclusionListAsString(); 2834 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2835 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2836 } 2837 } else { 2838 mGlobalProxy = null; 2839 } 2840 ContentResolver res = mContext.getContentResolver(); 2841 final long token = Binder.clearCallingIdentity(); 2842 try { 2843 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2844 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2845 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2846 exclList); 2847 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2848 } finally { 2849 Binder.restoreCallingIdentity(token); 2850 } 2851 2852 if (mGlobalProxy == null) { 2853 proxyProperties = mDefaultProxy; 2854 } 2855 sendProxyBroadcast(proxyProperties); 2856 } 2857 } 2858 2859 private void loadGlobalProxy() { 2860 ContentResolver res = mContext.getContentResolver(); 2861 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2862 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2863 String exclList = Settings.Global.getString(res, 2864 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2865 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2866 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2867 ProxyInfo proxyProperties; 2868 if (!TextUtils.isEmpty(pacFileUrl)) { 2869 proxyProperties = new ProxyInfo(pacFileUrl); 2870 } else { 2871 proxyProperties = new ProxyInfo(host, port, exclList); 2872 } 2873 if (!proxyProperties.isValid()) { 2874 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2875 return; 2876 } 2877 2878 synchronized (mProxyLock) { 2879 mGlobalProxy = proxyProperties; 2880 } 2881 } 2882 } 2883 2884 public ProxyInfo getGlobalProxy() { 2885 // this information is already available as a world read/writable jvm property 2886 // so this API change wouldn't have a benifit. It also breaks the passing 2887 // of proxy info to all the JVMs. 2888 // enforceAccessPermission(); 2889 synchronized (mProxyLock) { 2890 return mGlobalProxy; 2891 } 2892 } 2893 2894 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2895 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2896 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2897 proxy = null; 2898 } 2899 synchronized (mProxyLock) { 2900 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2901 if (mDefaultProxy == proxy) return; // catches repeated nulls 2902 if (proxy != null && !proxy.isValid()) { 2903 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2904 return; 2905 } 2906 2907 // This call could be coming from the PacManager, containing the port of the local 2908 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2909 // global (to get the correct local port), and send a broadcast. 2910 // TODO: Switch PacManager to have its own message to send back rather than 2911 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2912 if ((mGlobalProxy != null) && (proxy != null) 2913 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2914 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2915 mGlobalProxy = proxy; 2916 sendProxyBroadcast(mGlobalProxy); 2917 return; 2918 } 2919 mDefaultProxy = proxy; 2920 2921 if (mGlobalProxy != null) return; 2922 if (!mDefaultProxyDisabled) { 2923 sendProxyBroadcast(proxy); 2924 } 2925 } 2926 } 2927 2928 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2929 // This method gets called when any network changes proxy, but the broadcast only ever contains 2930 // the default proxy (even if it hasn't changed). 2931 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2932 // world where an app might be bound to a non-default network. 2933 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2934 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2935 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2936 2937 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2938 sendProxyBroadcast(getDefaultProxy()); 2939 } 2940 } 2941 2942 private void handleDeprecatedGlobalHttpProxy() { 2943 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2944 Settings.Global.HTTP_PROXY); 2945 if (!TextUtils.isEmpty(proxy)) { 2946 String data[] = proxy.split(":"); 2947 if (data.length == 0) { 2948 return; 2949 } 2950 2951 String proxyHost = data[0]; 2952 int proxyPort = 8080; 2953 if (data.length > 1) { 2954 try { 2955 proxyPort = Integer.parseInt(data[1]); 2956 } catch (NumberFormatException e) { 2957 return; 2958 } 2959 } 2960 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2961 setGlobalProxy(p); 2962 } 2963 } 2964 2965 private void sendProxyBroadcast(ProxyInfo proxy) { 2966 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2967 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2968 if (DBG) log("sending Proxy Broadcast for " + proxy); 2969 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2970 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2971 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2972 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2973 final long ident = Binder.clearCallingIdentity(); 2974 try { 2975 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2976 } finally { 2977 Binder.restoreCallingIdentity(ident); 2978 } 2979 } 2980 2981 private static class SettingsObserver extends ContentObserver { 2982 final private HashMap<Uri, Integer> mUriEventMap; 2983 final private Context mContext; 2984 final private Handler mHandler; 2985 2986 SettingsObserver(Context context, Handler handler) { 2987 super(null); 2988 mUriEventMap = new HashMap<Uri, Integer>(); 2989 mContext = context; 2990 mHandler = handler; 2991 } 2992 2993 void observe(Uri uri, int what) { 2994 mUriEventMap.put(uri, what); 2995 final ContentResolver resolver = mContext.getContentResolver(); 2996 resolver.registerContentObserver(uri, false, this); 2997 } 2998 2999 @Override 3000 public void onChange(boolean selfChange) { 3001 Slog.wtf(TAG, "Should never be reached."); 3002 } 3003 3004 @Override 3005 public void onChange(boolean selfChange, Uri uri) { 3006 final Integer what = mUriEventMap.get(uri); 3007 if (what != null) { 3008 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3009 } else { 3010 loge("No matching event to send for URI=" + uri); 3011 } 3012 } 3013 } 3014 3015 private static void log(String s) { 3016 Slog.d(TAG, s); 3017 } 3018 3019 private static void loge(String s) { 3020 Slog.e(TAG, s); 3021 } 3022 3023 private static <T> T checkNotNull(T value, String message) { 3024 if (value == null) { 3025 throw new NullPointerException(message); 3026 } 3027 return value; 3028 } 3029 3030 /** 3031 * Prepare for a VPN application. 3032 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3033 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3034 * 3035 * @param oldPackage Package name of the application which currently controls VPN, which will 3036 * be replaced. If there is no such application, this should should either be 3037 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3038 * @param newPackage Package name of the application which should gain control of VPN, or 3039 * {@code null} to disable. 3040 * @param userId User for whom to prepare the new VPN. 3041 * 3042 * @hide 3043 */ 3044 @Override 3045 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3046 int userId) { 3047 enforceCrossUserPermission(userId); 3048 throwIfLockdownEnabled(); 3049 3050 synchronized(mVpns) { 3051 Vpn vpn = mVpns.get(userId); 3052 if (vpn != null) { 3053 return vpn.prepare(oldPackage, newPackage); 3054 } else { 3055 return false; 3056 } 3057 } 3058 } 3059 3060 /** 3061 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3062 * This method is used by system-privileged apps. 3063 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3064 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3065 * 3066 * @param packageName The package for which authorization state should change. 3067 * @param userId User for whom {@code packageName} is installed. 3068 * @param authorized {@code true} if this app should be able to start a VPN connection without 3069 * explicit user approval, {@code false} if not. 3070 * 3071 * @hide 3072 */ 3073 @Override 3074 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3075 enforceCrossUserPermission(userId); 3076 3077 synchronized(mVpns) { 3078 Vpn vpn = mVpns.get(userId); 3079 if (vpn != null) { 3080 vpn.setPackageAuthorization(packageName, authorized); 3081 } 3082 } 3083 } 3084 3085 /** 3086 * Configure a TUN interface and return its file descriptor. Parameters 3087 * are encoded and opaque to this class. This method is used by VpnBuilder 3088 * and not available in ConnectivityManager. Permissions are checked in 3089 * Vpn class. 3090 * @hide 3091 */ 3092 @Override 3093 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3094 throwIfLockdownEnabled(); 3095 int user = UserHandle.getUserId(Binder.getCallingUid()); 3096 synchronized(mVpns) { 3097 return mVpns.get(user).establish(config); 3098 } 3099 } 3100 3101 /** 3102 * Start legacy VPN, controlling native daemons as needed. Creates a 3103 * secondary thread to perform connection work, returning quickly. 3104 */ 3105 @Override 3106 public void startLegacyVpn(VpnProfile profile) { 3107 throwIfLockdownEnabled(); 3108 final LinkProperties egress = getActiveLinkProperties(); 3109 if (egress == null) { 3110 throw new IllegalStateException("Missing active network connection"); 3111 } 3112 int user = UserHandle.getUserId(Binder.getCallingUid()); 3113 synchronized(mVpns) { 3114 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3115 } 3116 } 3117 3118 /** 3119 * Return the information of the ongoing legacy VPN. This method is used 3120 * by VpnSettings and not available in ConnectivityManager. Permissions 3121 * are checked in Vpn class. 3122 */ 3123 @Override 3124 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3125 enforceCrossUserPermission(userId); 3126 if (mLockdownEnabled) { 3127 return null; 3128 } 3129 3130 synchronized(mVpns) { 3131 return mVpns.get(userId).getLegacyVpnInfo(); 3132 } 3133 } 3134 3135 /** 3136 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3137 * and not available in ConnectivityManager. 3138 */ 3139 @Override 3140 public VpnInfo[] getAllVpnInfo() { 3141 enforceConnectivityInternalPermission(); 3142 if (mLockdownEnabled) { 3143 return new VpnInfo[0]; 3144 } 3145 3146 synchronized(mVpns) { 3147 List<VpnInfo> infoList = new ArrayList<>(); 3148 for (int i = 0; i < mVpns.size(); i++) { 3149 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3150 if (info != null) { 3151 infoList.add(info); 3152 } 3153 } 3154 return infoList.toArray(new VpnInfo[infoList.size()]); 3155 } 3156 } 3157 3158 /** 3159 * @return VPN information for accounting, or null if we can't retrieve all required 3160 * information, e.g primary underlying iface. 3161 */ 3162 @Nullable 3163 private VpnInfo createVpnInfo(Vpn vpn) { 3164 VpnInfo info = vpn.getVpnInfo(); 3165 if (info == null) { 3166 return null; 3167 } 3168 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3169 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3170 // the underlyingNetworks list. 3171 if (underlyingNetworks == null) { 3172 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3173 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3174 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3175 } 3176 } else if (underlyingNetworks.length > 0) { 3177 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3178 if (linkProperties != null) { 3179 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3180 } 3181 } 3182 return info.primaryUnderlyingIface == null ? null : info; 3183 } 3184 3185 /** 3186 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3187 * VpnDialogs and not available in ConnectivityManager. 3188 * Permissions are checked in Vpn class. 3189 * @hide 3190 */ 3191 @Override 3192 public VpnConfig getVpnConfig(int userId) { 3193 enforceCrossUserPermission(userId); 3194 synchronized(mVpns) { 3195 Vpn vpn = mVpns.get(userId); 3196 if (vpn != null) { 3197 return vpn.getVpnConfig(); 3198 } else { 3199 return null; 3200 } 3201 } 3202 } 3203 3204 @Override 3205 public boolean updateLockdownVpn() { 3206 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3207 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3208 return false; 3209 } 3210 3211 // Tear down existing lockdown if profile was removed 3212 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3213 if (mLockdownEnabled) { 3214 if (!mKeyStore.isUnlocked()) { 3215 Slog.w(TAG, "KeyStore locked; unable to create LockdownTracker"); 3216 return false; 3217 } 3218 3219 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3220 final VpnProfile profile = VpnProfile.decode( 3221 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3222 if (profile == null) { 3223 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3224 setLockdownTracker(null); 3225 return true; 3226 } 3227 int user = UserHandle.getUserId(Binder.getCallingUid()); 3228 synchronized(mVpns) { 3229 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, mVpns.get(user), 3230 profile)); 3231 } 3232 } else { 3233 setLockdownTracker(null); 3234 } 3235 3236 return true; 3237 } 3238 3239 /** 3240 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3241 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3242 */ 3243 private void setLockdownTracker(LockdownVpnTracker tracker) { 3244 // Shutdown any existing tracker 3245 final LockdownVpnTracker existing = mLockdownTracker; 3246 mLockdownTracker = null; 3247 if (existing != null) { 3248 existing.shutdown(); 3249 } 3250 3251 try { 3252 if (tracker != null) { 3253 mNetd.setFirewallEnabled(true); 3254 mNetd.setFirewallInterfaceRule("lo", true); 3255 mLockdownTracker = tracker; 3256 mLockdownTracker.init(); 3257 } else { 3258 mNetd.setFirewallEnabled(false); 3259 } 3260 } catch (RemoteException e) { 3261 // ignored; NMS lives inside system_server 3262 } 3263 } 3264 3265 private void throwIfLockdownEnabled() { 3266 if (mLockdownEnabled) { 3267 throw new IllegalStateException("Unavailable in lockdown mode"); 3268 } 3269 } 3270 3271 @Override 3272 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3273 // TODO: Remove? Any reason to trigger a provisioning check? 3274 return -1; 3275 } 3276 3277 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3278 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3279 3280 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3281 if (DBG) { 3282 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3283 + " action=" + action); 3284 } 3285 Intent intent = new Intent(action); 3286 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3287 // Concatenate the range of types onto the range of NetIDs. 3288 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3289 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3290 networkType, null, pendingIntent, false); 3291 } 3292 3293 /** 3294 * Show or hide network provisioning notifications. 3295 * 3296 * We use notifications for two purposes: to notify that a network requires sign in 3297 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3298 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3299 * particular network we can display the notification type that was most recently requested. 3300 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3301 * might first display NO_INTERNET, and then when the captive portal check completes, display 3302 * SIGN_IN. 3303 * 3304 * @param id an identifier that uniquely identifies this notification. This must match 3305 * between show and hide calls. We use the NetID value but for legacy callers 3306 * we concatenate the range of types with the range of NetIDs. 3307 */ 3308 private void setProvNotificationVisibleIntent(boolean visible, int id, 3309 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3310 boolean highPriority) { 3311 if (DBG) { 3312 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3313 + " networkType=" + getNetworkTypeName(networkType) 3314 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3315 } 3316 3317 Resources r = Resources.getSystem(); 3318 NotificationManager notificationManager = (NotificationManager) mContext 3319 .getSystemService(Context.NOTIFICATION_SERVICE); 3320 3321 if (visible) { 3322 CharSequence title; 3323 CharSequence details; 3324 int icon; 3325 if (notifyType == NotificationType.NO_INTERNET && 3326 networkType == ConnectivityManager.TYPE_WIFI) { 3327 title = r.getString(R.string.wifi_no_internet, 0); 3328 details = r.getString(R.string.wifi_no_internet_detailed); 3329 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3330 } else if (notifyType == NotificationType.SIGN_IN) { 3331 switch (networkType) { 3332 case ConnectivityManager.TYPE_WIFI: 3333 title = r.getString(R.string.wifi_available_sign_in, 0); 3334 details = r.getString(R.string.network_available_sign_in_detailed, 3335 extraInfo); 3336 icon = R.drawable.stat_notify_wifi_in_range; 3337 break; 3338 case ConnectivityManager.TYPE_MOBILE: 3339 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3340 title = r.getString(R.string.network_available_sign_in, 0); 3341 // TODO: Change this to pull from NetworkInfo once a printable 3342 // name has been added to it 3343 details = mTelephonyManager.getNetworkOperatorName(); 3344 icon = R.drawable.stat_notify_rssi_in_range; 3345 break; 3346 default: 3347 title = r.getString(R.string.network_available_sign_in, 0); 3348 details = r.getString(R.string.network_available_sign_in_detailed, 3349 extraInfo); 3350 icon = R.drawable.stat_notify_rssi_in_range; 3351 break; 3352 } 3353 } else { 3354 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3355 + getNetworkTypeName(networkType)); 3356 return; 3357 } 3358 3359 Notification notification = new Notification.Builder(mContext) 3360 .setWhen(0) 3361 .setSmallIcon(icon) 3362 .setAutoCancel(true) 3363 .setTicker(title) 3364 .setColor(mContext.getColor( 3365 com.android.internal.R.color.system_notification_accent_color)) 3366 .setContentTitle(title) 3367 .setContentText(details) 3368 .setContentIntent(intent) 3369 .setLocalOnly(true) 3370 .setPriority(highPriority ? 3371 Notification.PRIORITY_HIGH : 3372 Notification.PRIORITY_DEFAULT) 3373 .setDefaults(highPriority ? Notification.DEFAULT_ALL : 0) 3374 .setOnlyAlertOnce(true) 3375 .build(); 3376 3377 try { 3378 notificationManager.notify(NOTIFICATION_ID, id, notification); 3379 } catch (NullPointerException npe) { 3380 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3381 npe.printStackTrace(); 3382 } 3383 } else { 3384 try { 3385 notificationManager.cancel(NOTIFICATION_ID, id); 3386 } catch (NullPointerException npe) { 3387 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3388 npe.printStackTrace(); 3389 } 3390 } 3391 } 3392 3393 /** Location to an updatable file listing carrier provisioning urls. 3394 * An example: 3395 * 3396 * <?xml version="1.0" encoding="utf-8"?> 3397 * <provisioningUrls> 3398 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3399 * </provisioningUrls> 3400 */ 3401 private static final String PROVISIONING_URL_PATH = 3402 "/data/misc/radio/provisioning_urls.xml"; 3403 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3404 3405 /** XML tag for root element. */ 3406 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3407 /** XML tag for individual url */ 3408 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3409 /** XML attribute for mcc */ 3410 private static final String ATTR_MCC = "mcc"; 3411 /** XML attribute for mnc */ 3412 private static final String ATTR_MNC = "mnc"; 3413 3414 private String getProvisioningUrlBaseFromFile() { 3415 FileReader fileReader = null; 3416 XmlPullParser parser = null; 3417 Configuration config = mContext.getResources().getConfiguration(); 3418 3419 try { 3420 fileReader = new FileReader(mProvisioningUrlFile); 3421 parser = Xml.newPullParser(); 3422 parser.setInput(fileReader); 3423 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3424 3425 while (true) { 3426 XmlUtils.nextElement(parser); 3427 3428 String element = parser.getName(); 3429 if (element == null) break; 3430 3431 if (element.equals(TAG_PROVISIONING_URL)) { 3432 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3433 try { 3434 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3435 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3436 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3437 parser.next(); 3438 if (parser.getEventType() == XmlPullParser.TEXT) { 3439 return parser.getText(); 3440 } 3441 } 3442 } 3443 } catch (NumberFormatException e) { 3444 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3445 } 3446 } 3447 } 3448 return null; 3449 } catch (FileNotFoundException e) { 3450 loge("Carrier Provisioning Urls file not found"); 3451 } catch (XmlPullParserException e) { 3452 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3453 } catch (IOException e) { 3454 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3455 } finally { 3456 if (fileReader != null) { 3457 try { 3458 fileReader.close(); 3459 } catch (IOException e) {} 3460 } 3461 } 3462 return null; 3463 } 3464 3465 @Override 3466 public String getMobileProvisioningUrl() { 3467 enforceConnectivityInternalPermission(); 3468 String url = getProvisioningUrlBaseFromFile(); 3469 if (TextUtils.isEmpty(url)) { 3470 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3471 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3472 } else { 3473 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3474 } 3475 // populate the iccid, imei and phone number in the provisioning url. 3476 if (!TextUtils.isEmpty(url)) { 3477 String phoneNumber = mTelephonyManager.getLine1Number(); 3478 if (TextUtils.isEmpty(phoneNumber)) { 3479 phoneNumber = "0000000000"; 3480 } 3481 url = String.format(url, 3482 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3483 mTelephonyManager.getDeviceId() /* IMEI */, 3484 phoneNumber /* Phone numer */); 3485 } 3486 3487 return url; 3488 } 3489 3490 @Override 3491 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3492 String action) { 3493 enforceConnectivityInternalPermission(); 3494 final long ident = Binder.clearCallingIdentity(); 3495 try { 3496 setProvNotificationVisible(visible, networkType, action); 3497 } finally { 3498 Binder.restoreCallingIdentity(ident); 3499 } 3500 } 3501 3502 @Override 3503 public void setAirplaneMode(boolean enable) { 3504 enforceConnectivityInternalPermission(); 3505 final long ident = Binder.clearCallingIdentity(); 3506 try { 3507 final ContentResolver cr = mContext.getContentResolver(); 3508 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3509 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3510 intent.putExtra("state", enable); 3511 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3512 } finally { 3513 Binder.restoreCallingIdentity(ident); 3514 } 3515 } 3516 3517 private void onUserStart(int userId) { 3518 synchronized(mVpns) { 3519 Vpn userVpn = mVpns.get(userId); 3520 if (userVpn != null) { 3521 loge("Starting user already has a VPN"); 3522 return; 3523 } 3524 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3525 mVpns.put(userId, userVpn); 3526 } 3527 } 3528 3529 private void onUserStop(int userId) { 3530 synchronized(mVpns) { 3531 Vpn userVpn = mVpns.get(userId); 3532 if (userVpn == null) { 3533 loge("Stopping user has no VPN"); 3534 return; 3535 } 3536 mVpns.delete(userId); 3537 } 3538 } 3539 3540 private void onUserAdded(int userId) { 3541 synchronized(mVpns) { 3542 final int vpnsSize = mVpns.size(); 3543 for (int i = 0; i < vpnsSize; i++) { 3544 Vpn vpn = mVpns.valueAt(i); 3545 vpn.onUserAdded(userId); 3546 } 3547 } 3548 } 3549 3550 private void onUserRemoved(int userId) { 3551 synchronized(mVpns) { 3552 final int vpnsSize = mVpns.size(); 3553 for (int i = 0; i < vpnsSize; i++) { 3554 Vpn vpn = mVpns.valueAt(i); 3555 vpn.onUserRemoved(userId); 3556 } 3557 } 3558 } 3559 3560 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3561 @Override 3562 public void onReceive(Context context, Intent intent) { 3563 final String action = intent.getAction(); 3564 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3565 if (userId == UserHandle.USER_NULL) return; 3566 3567 if (Intent.ACTION_USER_STARTING.equals(action)) { 3568 onUserStart(userId); 3569 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3570 onUserStop(userId); 3571 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3572 onUserAdded(userId); 3573 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3574 onUserRemoved(userId); 3575 } 3576 } 3577 }; 3578 3579 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3580 new HashMap<Messenger, NetworkFactoryInfo>(); 3581 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3582 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3583 3584 private static class NetworkFactoryInfo { 3585 public final String name; 3586 public final Messenger messenger; 3587 public final AsyncChannel asyncChannel; 3588 3589 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3590 this.name = name; 3591 this.messenger = messenger; 3592 this.asyncChannel = asyncChannel; 3593 } 3594 } 3595 3596 /** 3597 * Tracks info about the requester. 3598 * Also used to notice when the calling process dies so we can self-expire 3599 */ 3600 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3601 static final boolean REQUEST = true; 3602 static final boolean LISTEN = false; 3603 3604 final NetworkRequest request; 3605 final PendingIntent mPendingIntent; 3606 boolean mPendingIntentSent; 3607 private final IBinder mBinder; 3608 final int mPid; 3609 final int mUid; 3610 final Messenger messenger; 3611 final boolean isRequest; 3612 3613 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, boolean isRequest) { 3614 request = r; 3615 mPendingIntent = pi; 3616 messenger = null; 3617 mBinder = null; 3618 mPid = getCallingPid(); 3619 mUid = getCallingUid(); 3620 this.isRequest = isRequest; 3621 } 3622 3623 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, boolean isRequest) { 3624 super(); 3625 messenger = m; 3626 request = r; 3627 mBinder = binder; 3628 mPid = getCallingPid(); 3629 mUid = getCallingUid(); 3630 this.isRequest = isRequest; 3631 mPendingIntent = null; 3632 3633 try { 3634 mBinder.linkToDeath(this, 0); 3635 } catch (RemoteException e) { 3636 binderDied(); 3637 } 3638 } 3639 3640 void unlinkDeathRecipient() { 3641 if (mBinder != null) { 3642 mBinder.unlinkToDeath(this, 0); 3643 } 3644 } 3645 3646 public void binderDied() { 3647 log("ConnectivityService NetworkRequestInfo binderDied(" + 3648 request + ", " + mBinder + ")"); 3649 releaseNetworkRequest(request); 3650 } 3651 3652 public String toString() { 3653 return (isRequest ? "Request" : "Listen") + 3654 " from uid/pid:" + mUid + "/" + mPid + 3655 " for " + request + 3656 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3657 } 3658 } 3659 3660 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3661 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3662 if (badCapability != null) { 3663 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3664 } 3665 } 3666 3667 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3668 final SortedSet<Integer> thresholds = new TreeSet(); 3669 synchronized (nai) { 3670 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3671 if (nri.request.networkCapabilities.hasSignalStrength() && 3672 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3673 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3674 } 3675 } 3676 } 3677 return new ArrayList<Integer>(thresholds); 3678 } 3679 3680 private void updateSignalStrengthThresholds( 3681 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3682 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3683 Bundle thresholds = new Bundle(); 3684 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3685 3686 // TODO: Switch to VDBG. 3687 if (DBG) { 3688 String detail; 3689 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3690 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3691 } else { 3692 detail = reason; 3693 } 3694 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3695 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3696 } 3697 3698 nai.asyncChannel.sendMessage( 3699 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3700 0, 0, thresholds); 3701 } 3702 3703 @Override 3704 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3705 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3706 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3707 enforceNetworkRequestPermissions(networkCapabilities); 3708 enforceMeteredApnPolicy(networkCapabilities); 3709 ensureRequestableCapabilities(networkCapabilities); 3710 3711 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3712 throw new IllegalArgumentException("Bad timeout specified"); 3713 } 3714 3715 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3716 nextNetworkRequestId()); 3717 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3718 NetworkRequestInfo.REQUEST); 3719 if (DBG) log("requestNetwork for " + nri); 3720 3721 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3722 if (timeoutMs > 0) { 3723 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3724 nri), timeoutMs); 3725 } 3726 return networkRequest; 3727 } 3728 3729 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3730 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 3731 enforceConnectivityInternalPermission(); 3732 } else { 3733 enforceChangePermission(); 3734 } 3735 } 3736 3737 @Override 3738 public boolean requestBandwidthUpdate(Network network) { 3739 enforceAccessPermission(); 3740 NetworkAgentInfo nai = null; 3741 if (network == null) { 3742 return false; 3743 } 3744 synchronized (mNetworkForNetId) { 3745 nai = mNetworkForNetId.get(network.netId); 3746 } 3747 if (nai != null) { 3748 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3749 return true; 3750 } 3751 return false; 3752 } 3753 3754 3755 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3756 // if UID is restricted, don't allow them to bring up metered APNs 3757 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 3758 final int uidRules; 3759 final int uid = Binder.getCallingUid(); 3760 synchronized(mRulesLock) { 3761 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3762 } 3763 if (uidRules != RULE_ALLOW_ALL) { 3764 // we could silently fail or we can filter the available nets to only give 3765 // them those they have access to. Chose the more useful 3766 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 3767 } 3768 } 3769 } 3770 3771 @Override 3772 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3773 PendingIntent operation) { 3774 checkNotNull(operation, "PendingIntent cannot be null."); 3775 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3776 enforceNetworkRequestPermissions(networkCapabilities); 3777 enforceMeteredApnPolicy(networkCapabilities); 3778 ensureRequestableCapabilities(networkCapabilities); 3779 3780 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3781 nextNetworkRequestId()); 3782 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3783 NetworkRequestInfo.REQUEST); 3784 if (DBG) log("pendingRequest for " + nri); 3785 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3786 nri)); 3787 return networkRequest; 3788 } 3789 3790 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3791 mHandler.sendMessageDelayed( 3792 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3793 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3794 } 3795 3796 @Override 3797 public void releasePendingNetworkRequest(PendingIntent operation) { 3798 checkNotNull(operation, "PendingIntent cannot be null."); 3799 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3800 getCallingUid(), 0, operation)); 3801 } 3802 3803 // In order to implement the compatibility measure for pre-M apps that call 3804 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 3805 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 3806 // This ensures it has permission to do so. 3807 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 3808 if (nc == null) { 3809 return false; 3810 } 3811 int[] transportTypes = nc.getTransportTypes(); 3812 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 3813 return false; 3814 } 3815 try { 3816 mContext.enforceCallingOrSelfPermission( 3817 android.Manifest.permission.ACCESS_WIFI_STATE, 3818 "ConnectivityService"); 3819 } catch (SecurityException e) { 3820 return false; 3821 } 3822 return true; 3823 } 3824 3825 @Override 3826 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 3827 Messenger messenger, IBinder binder) { 3828 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3829 enforceAccessPermission(); 3830 } 3831 3832 NetworkRequest networkRequest = new NetworkRequest( 3833 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3834 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3835 NetworkRequestInfo.LISTEN); 3836 if (DBG) log("listenForNetwork for " + nri); 3837 3838 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3839 return networkRequest; 3840 } 3841 3842 @Override 3843 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 3844 PendingIntent operation) { 3845 checkNotNull(operation, "PendingIntent cannot be null."); 3846 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3847 enforceAccessPermission(); 3848 } 3849 3850 NetworkRequest networkRequest = new NetworkRequest( 3851 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3852 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3853 NetworkRequestInfo.LISTEN); 3854 if (DBG) log("pendingListenForNetwork for " + nri); 3855 3856 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3857 } 3858 3859 @Override 3860 public void releaseNetworkRequest(NetworkRequest networkRequest) { 3861 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 3862 0, networkRequest)); 3863 } 3864 3865 @Override 3866 public void registerNetworkFactory(Messenger messenger, String name) { 3867 enforceConnectivityInternalPermission(); 3868 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 3869 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 3870 } 3871 3872 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 3873 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 3874 mNetworkFactoryInfos.put(nfi.messenger, nfi); 3875 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 3876 } 3877 3878 @Override 3879 public void unregisterNetworkFactory(Messenger messenger) { 3880 enforceConnectivityInternalPermission(); 3881 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 3882 } 3883 3884 private void handleUnregisterNetworkFactory(Messenger messenger) { 3885 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 3886 if (nfi == null) { 3887 loge("Failed to find Messenger in unregisterNetworkFactory"); 3888 return; 3889 } 3890 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 3891 } 3892 3893 /** 3894 * NetworkAgentInfo supporting a request by requestId. 3895 * These have already been vetted (their Capabilities satisfy the request) 3896 * and the are the highest scored network available. 3897 * the are keyed off the Requests requestId. 3898 */ 3899 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 3900 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 3901 new SparseArray<NetworkAgentInfo>(); 3902 3903 // NOTE: Accessed on multiple threads, must be synchronized on itself. 3904 @GuardedBy("mNetworkForNetId") 3905 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 3906 new SparseArray<NetworkAgentInfo>(); 3907 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 3908 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 3909 // there may not be a strict 1:1 correlation between the two. 3910 @GuardedBy("mNetworkForNetId") 3911 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 3912 3913 // NetworkAgentInfo keyed off its connecting messenger 3914 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 3915 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 3916 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 3917 new HashMap<Messenger, NetworkAgentInfo>(); 3918 3919 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 3920 private final NetworkRequest mDefaultRequest; 3921 3922 // Request used to optionally keep mobile data active even when higher 3923 // priority networks like Wi-Fi are active. 3924 private final NetworkRequest mDefaultMobileDataRequest; 3925 3926 private NetworkAgentInfo getDefaultNetwork() { 3927 return mNetworkForRequestId.get(mDefaultRequest.requestId); 3928 } 3929 3930 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 3931 return nai == getDefaultNetwork(); 3932 } 3933 3934 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 3935 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 3936 int currentScore, NetworkMisc networkMisc) { 3937 enforceConnectivityInternalPermission(); 3938 3939 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 3940 // satisfies mDefaultRequest. 3941 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 3942 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 3943 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 3944 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 3945 synchronized (this) { 3946 nai.networkMonitor.systemReady = mSystemReady; 3947 } 3948 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network); 3949 if (DBG) log("registerNetworkAgent " + nai); 3950 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 3951 return nai.network.netId; 3952 } 3953 3954 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 3955 if (VDBG) log("Got NetworkAgent Messenger"); 3956 mNetworkAgentInfos.put(na.messenger, na); 3957 synchronized (mNetworkForNetId) { 3958 mNetworkForNetId.put(na.network.netId, na); 3959 } 3960 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 3961 NetworkInfo networkInfo = na.networkInfo; 3962 na.networkInfo = null; 3963 updateNetworkInfo(na, networkInfo); 3964 } 3965 3966 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 3967 LinkProperties newLp = networkAgent.linkProperties; 3968 int netId = networkAgent.network.netId; 3969 3970 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 3971 // we do anything else, make sure its LinkProperties are accurate. 3972 if (networkAgent.clatd != null) { 3973 networkAgent.clatd.fixupLinkProperties(oldLp); 3974 } 3975 3976 updateInterfaces(newLp, oldLp, netId); 3977 updateMtu(newLp, oldLp); 3978 // TODO - figure out what to do for clat 3979// for (LinkProperties lp : newLp.getStackedLinks()) { 3980// updateMtu(lp, null); 3981// } 3982 updateTcpBufferSizes(networkAgent); 3983 3984 // TODO: deprecate and remove mDefaultDns when we can do so safely. See http://b/18327075 3985 // In L, we used it only when the network had Internet access but provided no DNS servers. 3986 // For now, just disable it, and if disabling it doesn't break things, remove it. 3987 // final boolean useDefaultDns = networkAgent.networkCapabilities.hasCapability( 3988 // NET_CAPABILITY_INTERNET); 3989 final boolean useDefaultDns = false; 3990 final boolean flushDns = updateRoutes(newLp, oldLp, netId); 3991 updateDnses(newLp, oldLp, netId, flushDns, useDefaultDns); 3992 3993 updateClat(newLp, oldLp, networkAgent); 3994 if (isDefaultNetwork(networkAgent)) { 3995 handleApplyDefaultProxy(newLp.getHttpProxy()); 3996 } else { 3997 updateProxy(newLp, oldLp, networkAgent); 3998 } 3999 // TODO - move this check to cover the whole function 4000 if (!Objects.equals(newLp, oldLp)) { 4001 notifyIfacesChanged(); 4002 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4003 } 4004 4005 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4006 } 4007 4008 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4009 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4010 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4011 4012 if (!wasRunningClat && shouldRunClat) { 4013 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4014 nai.clatd.start(); 4015 } else if (wasRunningClat && !shouldRunClat) { 4016 nai.clatd.stop(); 4017 } 4018 } 4019 4020 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4021 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4022 if (oldLp != null) { 4023 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4024 } else if (newLp != null) { 4025 interfaceDiff.added = newLp.getAllInterfaceNames(); 4026 } 4027 for (String iface : interfaceDiff.added) { 4028 try { 4029 if (DBG) log("Adding iface " + iface + " to network " + netId); 4030 mNetd.addInterfaceToNetwork(iface, netId); 4031 } catch (Exception e) { 4032 loge("Exception adding interface: " + e); 4033 } 4034 } 4035 for (String iface : interfaceDiff.removed) { 4036 try { 4037 if (DBG) log("Removing iface " + iface + " from network " + netId); 4038 mNetd.removeInterfaceFromNetwork(iface, netId); 4039 } catch (Exception e) { 4040 loge("Exception removing interface: " + e); 4041 } 4042 } 4043 } 4044 4045 /** 4046 * Have netd update routes from oldLp to newLp. 4047 * @return true if routes changed between oldLp and newLp 4048 */ 4049 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4050 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4051 if (oldLp != null) { 4052 routeDiff = oldLp.compareAllRoutes(newLp); 4053 } else if (newLp != null) { 4054 routeDiff.added = newLp.getAllRoutes(); 4055 } 4056 4057 // add routes before removing old in case it helps with continuous connectivity 4058 4059 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4060 for (RouteInfo route : routeDiff.added) { 4061 if (route.hasGateway()) continue; 4062 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4063 try { 4064 mNetd.addRoute(netId, route); 4065 } catch (Exception e) { 4066 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4067 loge("Exception in addRoute for non-gateway: " + e); 4068 } 4069 } 4070 } 4071 for (RouteInfo route : routeDiff.added) { 4072 if (route.hasGateway() == false) continue; 4073 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4074 try { 4075 mNetd.addRoute(netId, route); 4076 } catch (Exception e) { 4077 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4078 loge("Exception in addRoute for gateway: " + e); 4079 } 4080 } 4081 } 4082 4083 for (RouteInfo route : routeDiff.removed) { 4084 if (DBG) log("Removing Route [" + route + "] from network " + netId); 4085 try { 4086 mNetd.removeRoute(netId, route); 4087 } catch (Exception e) { 4088 loge("Exception in removeRoute: " + e); 4089 } 4090 } 4091 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4092 } 4093 4094 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId, 4095 boolean flush, boolean useDefaultDns) { 4096 if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) { 4097 Collection<InetAddress> dnses = newLp.getDnsServers(); 4098 if (dnses.size() == 0 && mDefaultDns != null && useDefaultDns) { 4099 dnses = new ArrayList(); 4100 dnses.add(mDefaultDns); 4101 if (DBG) { 4102 loge("no dns provided for netId " + netId + ", so using defaults"); 4103 } 4104 } 4105 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 4106 try { 4107 mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses), 4108 newLp.getDomains()); 4109 } catch (Exception e) { 4110 loge("Exception in setDnsServersForNetwork: " + e); 4111 } 4112 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4113 if (defaultNai != null && defaultNai.network.netId == netId) { 4114 setDefaultDnsSystemProperties(dnses); 4115 } 4116 flushVmDnsCache(); 4117 } else if (flush) { 4118 try { 4119 mNetd.flushNetworkDnsCache(netId); 4120 } catch (Exception e) { 4121 loge("Exception in flushNetworkDnsCache: " + e); 4122 } 4123 flushVmDnsCache(); 4124 } 4125 } 4126 4127 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4128 int last = 0; 4129 for (InetAddress dns : dnses) { 4130 ++last; 4131 String key = "net.dns" + last; 4132 String value = dns.getHostAddress(); 4133 SystemProperties.set(key, value); 4134 } 4135 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4136 String key = "net.dns" + i; 4137 SystemProperties.set(key, ""); 4138 } 4139 mNumDnsEntries = last; 4140 } 4141 4142 /** 4143 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4144 * augmented with any stateful capabilities implied from {@code networkAgent} 4145 * (e.g., validated status and captive portal status). 4146 * 4147 * @param nai the network having its capabilities updated. 4148 * @param networkCapabilities the new network capabilities. 4149 */ 4150 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4151 // Don't modify caller's NetworkCapabilities. 4152 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4153 if (nai.lastValidated) { 4154 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4155 } else { 4156 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4157 } 4158 if (nai.lastCaptivePortalDetected) { 4159 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4160 } else { 4161 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4162 } 4163 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4164 final int oldScore = nai.getCurrentScore(); 4165 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4166 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4167 try { 4168 mNetd.setNetworkPermission(nai.network.netId, 4169 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4170 null : NetworkManagementService.PERMISSION_SYSTEM); 4171 } catch (RemoteException e) { 4172 loge("Exception in setNetworkPermission: " + e); 4173 } 4174 } 4175 synchronized (nai) { 4176 nai.networkCapabilities = networkCapabilities; 4177 } 4178 rematchAllNetworksAndRequests(nai, oldScore); 4179 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4180 } 4181 } 4182 4183 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4184 for (int i = 0; i < nai.networkRequests.size(); i++) { 4185 NetworkRequest nr = nai.networkRequests.valueAt(i); 4186 // Don't send listening requests to factories. b/17393458 4187 if (!isRequest(nr)) continue; 4188 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4189 } 4190 } 4191 4192 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4193 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4194 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4195 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4196 networkRequest); 4197 } 4198 } 4199 4200 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4201 int notificationType) { 4202 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4203 Intent intent = new Intent(); 4204 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4205 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4206 nri.mPendingIntentSent = true; 4207 sendIntent(nri.mPendingIntent, intent); 4208 } 4209 // else not handled 4210 } 4211 4212 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4213 mPendingIntentWakeLock.acquire(); 4214 try { 4215 if (DBG) log("Sending " + pendingIntent); 4216 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4217 } catch (PendingIntent.CanceledException e) { 4218 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4219 mPendingIntentWakeLock.release(); 4220 releasePendingNetworkRequest(pendingIntent); 4221 } 4222 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4223 } 4224 4225 @Override 4226 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4227 String resultData, Bundle resultExtras) { 4228 if (DBG) log("Finished sending " + pendingIntent); 4229 mPendingIntentWakeLock.release(); 4230 // Release with a delay so the receiving client has an opportunity to put in its 4231 // own request. 4232 releasePendingNetworkRequestWithDelay(pendingIntent); 4233 } 4234 4235 private void callCallbackForRequest(NetworkRequestInfo nri, 4236 NetworkAgentInfo networkAgent, int notificationType) { 4237 if (nri.messenger == null) return; // Default request has no msgr 4238 Bundle bundle = new Bundle(); 4239 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4240 new NetworkRequest(nri.request)); 4241 Message msg = Message.obtain(); 4242 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4243 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4244 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4245 } 4246 switch (notificationType) { 4247 case ConnectivityManager.CALLBACK_LOSING: { 4248 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4249 break; 4250 } 4251 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4252 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4253 new NetworkCapabilities(networkAgent.networkCapabilities)); 4254 break; 4255 } 4256 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4257 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4258 new LinkProperties(networkAgent.linkProperties)); 4259 break; 4260 } 4261 } 4262 msg.what = notificationType; 4263 msg.setData(bundle); 4264 try { 4265 if (VDBG) { 4266 log("sending notification " + notifyTypeToName(notificationType) + 4267 " for " + nri.request); 4268 } 4269 nri.messenger.send(msg); 4270 } catch (RemoteException e) { 4271 // may occur naturally in the race of binder death. 4272 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4273 } 4274 } 4275 4276 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4277 for (int i = 0; i < nai.networkRequests.size(); i++) { 4278 NetworkRequest nr = nai.networkRequests.valueAt(i); 4279 // Ignore listening requests. 4280 if (!isRequest(nr)) continue; 4281 loge("Dead network still had at least " + nr); 4282 break; 4283 } 4284 nai.asyncChannel.disconnect(); 4285 } 4286 4287 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4288 if (oldNetwork == null) { 4289 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4290 return; 4291 } 4292 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4293 teardownUnneededNetwork(oldNetwork); 4294 } 4295 4296 private void makeDefault(NetworkAgentInfo newNetwork) { 4297 if (DBG) log("Switching to new default network: " + newNetwork); 4298 setupDataActivityTracking(newNetwork); 4299 try { 4300 mNetd.setDefaultNetId(newNetwork.network.netId); 4301 } catch (Exception e) { 4302 loge("Exception setting default network :" + e); 4303 } 4304 notifyLockdownVpn(newNetwork); 4305 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4306 updateTcpBufferSizes(newNetwork); 4307 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4308 } 4309 4310 // Handles a network appearing or improving its score. 4311 // 4312 // - Evaluates all current NetworkRequests that can be 4313 // satisfied by newNetwork, and reassigns to newNetwork 4314 // any such requests for which newNetwork is the best. 4315 // 4316 // - Lingers any validated Networks that as a result are no longer 4317 // needed. A network is needed if it is the best network for 4318 // one or more NetworkRequests, or if it is a VPN. 4319 // 4320 // - Tears down newNetwork if it just became validated 4321 // but turns out to be unneeded. 4322 // 4323 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4324 // networks that have no chance (i.e. even if validated) 4325 // of becoming the highest scoring network. 4326 // 4327 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4328 // it does not remove NetworkRequests that other Networks could better satisfy. 4329 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4330 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4331 // as it performs better by a factor of the number of Networks. 4332 // 4333 // @param newNetwork is the network to be matched against NetworkRequests. 4334 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4335 // performed to tear down unvalidated networks that have no chance (i.e. even if 4336 // validated) of becoming the highest scoring network. 4337 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4338 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4339 if (!newNetwork.created) return; 4340 boolean keep = newNetwork.isVPN(); 4341 boolean isNewDefault = false; 4342 NetworkAgentInfo oldDefaultNetwork = null; 4343 if (VDBG) log("rematching " + newNetwork.name()); 4344 // Find and migrate to this Network any NetworkRequests for 4345 // which this network is now the best. 4346 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4347 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4348 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4349 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4350 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4351 final boolean satisfies = newNetwork.satisfies(nri.request); 4352 if (newNetwork == currentNetwork && satisfies) { 4353 if (VDBG) { 4354 log("Network " + newNetwork.name() + " was already satisfying" + 4355 " request " + nri.request.requestId + ". No change."); 4356 } 4357 keep = true; 4358 continue; 4359 } 4360 4361 // check if it satisfies the NetworkCapabilities 4362 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4363 if (satisfies) { 4364 if (!nri.isRequest) { 4365 // This is not a request, it's a callback listener. 4366 // Add it to newNetwork regardless of score. 4367 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4368 continue; 4369 } 4370 4371 // next check if it's better than any current network we're using for 4372 // this request 4373 if (VDBG) { 4374 log("currentScore = " + 4375 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4376 ", newScore = " + newNetwork.getCurrentScore()); 4377 } 4378 if (currentNetwork == null || 4379 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4380 if (DBG) log("rematch for " + newNetwork.name()); 4381 if (currentNetwork != null) { 4382 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4383 currentNetwork.networkRequests.remove(nri.request.requestId); 4384 currentNetwork.networkLingered.add(nri.request); 4385 affectedNetworks.add(currentNetwork); 4386 } else { 4387 if (DBG) log(" accepting network in place of null"); 4388 } 4389 unlinger(newNetwork); 4390 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4391 if (!newNetwork.addRequest(nri.request)) { 4392 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4393 } 4394 addedRequests.add(nri); 4395 keep = true; 4396 // Tell NetworkFactories about the new score, so they can stop 4397 // trying to connect if they know they cannot match it. 4398 // TODO - this could get expensive if we have alot of requests for this 4399 // network. Think about if there is a way to reduce this. Push 4400 // netid->request mapping to each factory? 4401 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4402 if (mDefaultRequest.requestId == nri.request.requestId) { 4403 isNewDefault = true; 4404 oldDefaultNetwork = currentNetwork; 4405 } 4406 } 4407 } else if (newNetwork.networkRequests.get(nri.request.requestId) != null) { 4408 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4409 // mark it as no longer satisfying "nri". Because networks are processed by 4410 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4411 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4412 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4413 // This means this code doesn't have to handle the case where "currentNetwork" no 4414 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4415 if (DBG) { 4416 log("Network " + newNetwork.name() + " stopped satisfying" + 4417 " request " + nri.request.requestId); 4418 } 4419 newNetwork.networkRequests.remove(nri.request.requestId); 4420 if (currentNetwork == newNetwork) { 4421 mNetworkForRequestId.remove(nri.request.requestId); 4422 sendUpdatedScoreToFactories(nri.request, 0); 4423 } else { 4424 if (nri.isRequest == true) { 4425 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4426 newNetwork.name() + 4427 " without updating mNetworkForRequestId or factories!"); 4428 } 4429 } 4430 // TODO: technically, sending CALLBACK_LOST here is 4431 // incorrect if nri is a request (not a listen) and there 4432 // is a replacement network currently connected that can 4433 // satisfy it. However, the only capability that can both 4434 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4435 // so this code is only incorrect for a network that loses 4436 // the TRUSTED capability, which is a rare case. 4437 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST); 4438 } 4439 } 4440 // Linger any networks that are no longer needed. 4441 for (NetworkAgentInfo nai : affectedNetworks) { 4442 if (nai.lingering) { 4443 // Already lingered. Nothing to do. This can only happen if "nai" is in 4444 // "affectedNetworks" twice. The reasoning being that to get added to 4445 // "affectedNetworks", "nai" must have been satisfying a NetworkRequest 4446 // (i.e. not lingered) so it could have only been lingered by this loop. 4447 // unneeded(nai) will be false and we'll call unlinger() below which would 4448 // be bad, so handle it here. 4449 } else if (unneeded(nai)) { 4450 linger(nai); 4451 } else { 4452 // Clear nai.networkLingered we might have added above. 4453 unlinger(nai); 4454 } 4455 } 4456 if (isNewDefault) { 4457 // Notify system services that this network is up. 4458 makeDefault(newNetwork); 4459 synchronized (ConnectivityService.this) { 4460 // have a new default network, release the transition wakelock in 4461 // a second if it's held. The second pause is to allow apps 4462 // to reconnect over the new network 4463 if (mNetTransitionWakeLock.isHeld()) { 4464 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4465 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4466 mNetTransitionWakeLockSerialNumber, 0), 4467 1000); 4468 } 4469 } 4470 } 4471 4472 // do this after the default net is switched, but 4473 // before LegacyTypeTracker sends legacy broadcasts 4474 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4475 4476 if (isNewDefault) { 4477 // Maintain the illusion: since the legacy API only 4478 // understands one network at a time, we must pretend 4479 // that the current default network disconnected before 4480 // the new one connected. 4481 if (oldDefaultNetwork != null) { 4482 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4483 oldDefaultNetwork, true); 4484 } 4485 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4486 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4487 notifyLockdownVpn(newNetwork); 4488 } 4489 4490 if (keep) { 4491 // Notify battery stats service about this network, both the normal 4492 // interface and any stacked links. 4493 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4494 try { 4495 final IBatteryStats bs = BatteryStatsService.getService(); 4496 final int type = newNetwork.networkInfo.getType(); 4497 4498 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4499 bs.noteNetworkInterfaceType(baseIface, type); 4500 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4501 final String stackedIface = stacked.getInterfaceName(); 4502 bs.noteNetworkInterfaceType(stackedIface, type); 4503 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4504 } 4505 } catch (RemoteException ignored) { 4506 } 4507 4508 // This has to happen after the notifyNetworkCallbacks as that tickles each 4509 // ConnectivityManager instance so that legacy requests correctly bind dns 4510 // requests to this network. The legacy users are listening for this bcast 4511 // and will generally do a dns request so they can ensureRouteToHost and if 4512 // they do that before the callbacks happen they'll use the default network. 4513 // 4514 // TODO: Is there still a race here? We send the broadcast 4515 // after sending the callback, but if the app can receive the 4516 // broadcast before the callback, it might still break. 4517 // 4518 // This *does* introduce a race where if the user uses the new api 4519 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4520 // they may get old info. Reverse this after the old startUsing api is removed. 4521 // This is on top of the multiple intent sequencing referenced in the todo above. 4522 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4523 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4524 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4525 // legacy type tracker filters out repeat adds 4526 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4527 } 4528 } 4529 4530 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4531 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4532 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4533 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4534 if (newNetwork.isVPN()) { 4535 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4536 } 4537 } 4538 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4539 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4540 if (unneeded(nai)) { 4541 if (DBG) log("Reaping " + nai.name()); 4542 teardownUnneededNetwork(nai); 4543 } 4544 } 4545 } 4546 } 4547 4548 /** 4549 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4550 * being disconnected. 4551 * @param changed If only one Network's score or capabilities have been modified since the last 4552 * time this function was called, pass this Network in this argument, otherwise pass 4553 * null. 4554 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4555 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4556 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4557 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4558 * network's score. 4559 */ 4560 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4561 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4562 // to avoid the slowness. It is not simply enough to process just "changed", for 4563 // example in the case where "changed"'s score decreases and another network should begin 4564 // satifying a NetworkRequest that "changed" currently satisfies. 4565 4566 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4567 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4568 // rematchNetworkAndRequests() handles. 4569 if (changed != null && oldScore < changed.getCurrentScore()) { 4570 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP); 4571 } else { 4572 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4573 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4574 // Rematch higher scoring networks first to prevent requests first matching a lower 4575 // scoring network and then a higher scoring network, which could produce multiple 4576 // callbacks and inadvertently unlinger networks. 4577 Arrays.sort(nais); 4578 for (NetworkAgentInfo nai : nais) { 4579 rematchNetworkAndRequests(nai, 4580 // Only reap the last time through the loop. Reaping before all rematching 4581 // is complete could incorrectly teardown a network that hasn't yet been 4582 // rematched. 4583 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4584 : ReapUnvalidatedNetworks.REAP); 4585 } 4586 } 4587 } 4588 4589 private void updateInetCondition(NetworkAgentInfo nai) { 4590 // Don't bother updating until we've graduated to validated at least once. 4591 if (!nai.everValidated) return; 4592 // For now only update icons for default connection. 4593 // TODO: Update WiFi and cellular icons separately. b/17237507 4594 if (!isDefaultNetwork(nai)) return; 4595 4596 int newInetCondition = nai.lastValidated ? 100 : 0; 4597 // Don't repeat publish. 4598 if (newInetCondition == mDefaultInetConditionPublished) return; 4599 4600 mDefaultInetConditionPublished = newInetCondition; 4601 sendInetConditionBroadcast(nai.networkInfo); 4602 } 4603 4604 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4605 if (mLockdownTracker != null) { 4606 if (nai != null && nai.isVPN()) { 4607 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4608 } else { 4609 mLockdownTracker.onNetworkInfoChanged(); 4610 } 4611 } 4612 } 4613 4614 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4615 NetworkInfo.State state = newInfo.getState(); 4616 NetworkInfo oldInfo = null; 4617 final int oldScore = networkAgent.getCurrentScore(); 4618 synchronized (networkAgent) { 4619 oldInfo = networkAgent.networkInfo; 4620 networkAgent.networkInfo = newInfo; 4621 } 4622 notifyLockdownVpn(networkAgent); 4623 4624 if (oldInfo != null && oldInfo.getState() == state) { 4625 if (VDBG) log("ignoring duplicate network state non-change"); 4626 return; 4627 } 4628 if (DBG) { 4629 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4630 (oldInfo == null ? "null" : oldInfo.getState()) + 4631 " to " + state); 4632 } 4633 4634 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4635 try { 4636 // This should never fail. Specifying an already in use NetID will cause failure. 4637 if (networkAgent.isVPN()) { 4638 mNetd.createVirtualNetwork(networkAgent.network.netId, 4639 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4640 (networkAgent.networkMisc == null || 4641 !networkAgent.networkMisc.allowBypass)); 4642 } else { 4643 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4644 networkAgent.networkCapabilities.hasCapability( 4645 NET_CAPABILITY_NOT_RESTRICTED) ? 4646 null : NetworkManagementService.PERMISSION_SYSTEM); 4647 } 4648 } catch (Exception e) { 4649 loge("Error creating network " + networkAgent.network.netId + ": " 4650 + e.getMessage()); 4651 return; 4652 } 4653 networkAgent.created = true; 4654 updateLinkProperties(networkAgent, null); 4655 notifyIfacesChanged(); 4656 4657 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4658 scheduleUnvalidatedPrompt(networkAgent); 4659 4660 if (networkAgent.isVPN()) { 4661 // Temporarily disable the default proxy (not global). 4662 synchronized (mProxyLock) { 4663 if (!mDefaultProxyDisabled) { 4664 mDefaultProxyDisabled = true; 4665 if (mGlobalProxy == null && mDefaultProxy != null) { 4666 sendProxyBroadcast(null); 4667 } 4668 } 4669 } 4670 // TODO: support proxy per network. 4671 } 4672 4673 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 4674 // be communicated to a particular NetworkAgent depends only on the network's immutable, 4675 // capabilities, so it only needs to be done once on initial connect, not every time the 4676 // network's capabilities change. Note that we do this before rematching the network, 4677 // so we could decide to tear it down immediately afterwards. That's fine though - on 4678 // disconnection NetworkAgents should stop any signal strength monitoring they have been 4679 // doing. 4680 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 4681 4682 // Consider network even though it is not yet validated. 4683 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP); 4684 4685 // This has to happen after matching the requests, because callbacks are just requests. 4686 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4687 } else if (state == NetworkInfo.State.DISCONNECTED) { 4688 networkAgent.asyncChannel.disconnect(); 4689 if (networkAgent.isVPN()) { 4690 synchronized (mProxyLock) { 4691 if (mDefaultProxyDisabled) { 4692 mDefaultProxyDisabled = false; 4693 if (mGlobalProxy == null && mDefaultProxy != null) { 4694 sendProxyBroadcast(mDefaultProxy); 4695 } 4696 } 4697 } 4698 } 4699 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 4700 state == NetworkInfo.State.SUSPENDED) { 4701 // going into or coming out of SUSPEND: rescore and notify 4702 if (networkAgent.getCurrentScore() != oldScore) { 4703 rematchAllNetworksAndRequests(networkAgent, oldScore); 4704 } 4705 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 4706 ConnectivityManager.CALLBACK_SUSPENDED : 4707 ConnectivityManager.CALLBACK_RESUMED)); 4708 mLegacyTypeTracker.update(networkAgent); 4709 } 4710 } 4711 4712 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4713 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4714 if (score < 0) { 4715 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4716 "). Bumping score to min of 0"); 4717 score = 0; 4718 } 4719 4720 final int oldScore = nai.getCurrentScore(); 4721 nai.setCurrentScore(score); 4722 4723 rematchAllNetworksAndRequests(nai, oldScore); 4724 4725 sendUpdatedScoreToFactories(nai); 4726 } 4727 4728 // notify only this one new request of the current state 4729 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4730 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4731 // TODO - read state from monitor to decide what to send. 4732// if (nai.networkMonitor.isLingering()) { 4733// notifyType = NetworkCallbacks.LOSING; 4734// } else if (nai.networkMonitor.isEvaluating()) { 4735// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4736// } 4737 if (nri.mPendingIntent == null) { 4738 callCallbackForRequest(nri, nai, notifyType); 4739 } else { 4740 sendPendingIntentForRequest(nri, nai, notifyType); 4741 } 4742 } 4743 4744 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 4745 // The NetworkInfo we actually send out has no bearing on the real 4746 // state of affairs. For example, if the default connection is mobile, 4747 // and a request for HIPRI has just gone away, we need to pretend that 4748 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4749 // the state to DISCONNECTED, even though the network is of type MOBILE 4750 // and is still connected. 4751 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4752 info.setType(type); 4753 if (state != DetailedState.DISCONNECTED) { 4754 info.setDetailedState(state, null, info.getExtraInfo()); 4755 sendConnectedBroadcast(info); 4756 } else { 4757 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 4758 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4759 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4760 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4761 if (info.isFailover()) { 4762 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4763 nai.networkInfo.setFailover(false); 4764 } 4765 if (info.getReason() != null) { 4766 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4767 } 4768 if (info.getExtraInfo() != null) { 4769 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4770 } 4771 NetworkAgentInfo newDefaultAgent = null; 4772 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4773 newDefaultAgent = getDefaultNetwork(); 4774 if (newDefaultAgent != null) { 4775 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4776 newDefaultAgent.networkInfo); 4777 } else { 4778 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4779 } 4780 } 4781 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4782 mDefaultInetConditionPublished); 4783 sendStickyBroadcast(intent); 4784 if (newDefaultAgent != null) { 4785 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4786 } 4787 } 4788 } 4789 4790 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4791 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4792 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4793 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4794 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4795 if (VDBG) log(" sending notification for " + nr); 4796 if (nri.mPendingIntent == null) { 4797 callCallbackForRequest(nri, networkAgent, notifyType); 4798 } else { 4799 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4800 } 4801 } 4802 } 4803 4804 private String notifyTypeToName(int notifyType) { 4805 switch (notifyType) { 4806 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4807 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4808 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4809 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4810 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4811 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4812 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4813 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4814 } 4815 return "UNKNOWN"; 4816 } 4817 4818 /** 4819 * Notify other system services that set of active ifaces has changed. 4820 */ 4821 private void notifyIfacesChanged() { 4822 try { 4823 mStatsService.forceUpdateIfaces(); 4824 } catch (Exception ignored) { 4825 } 4826 } 4827 4828 @Override 4829 public boolean addVpnAddress(String address, int prefixLength) { 4830 throwIfLockdownEnabled(); 4831 int user = UserHandle.getUserId(Binder.getCallingUid()); 4832 synchronized (mVpns) { 4833 return mVpns.get(user).addAddress(address, prefixLength); 4834 } 4835 } 4836 4837 @Override 4838 public boolean removeVpnAddress(String address, int prefixLength) { 4839 throwIfLockdownEnabled(); 4840 int user = UserHandle.getUserId(Binder.getCallingUid()); 4841 synchronized (mVpns) { 4842 return mVpns.get(user).removeAddress(address, prefixLength); 4843 } 4844 } 4845 4846 @Override 4847 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 4848 throwIfLockdownEnabled(); 4849 int user = UserHandle.getUserId(Binder.getCallingUid()); 4850 boolean success; 4851 synchronized (mVpns) { 4852 success = mVpns.get(user).setUnderlyingNetworks(networks); 4853 } 4854 if (success) { 4855 notifyIfacesChanged(); 4856 } 4857 return success; 4858 } 4859 4860 @Override 4861 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 4862 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 4863 enforceKeepalivePermission(); 4864 mKeepaliveTracker.startNattKeepalive( 4865 getNetworkAgentInfoForNetwork(network), 4866 intervalSeconds, messenger, binder, 4867 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 4868 } 4869 4870 @Override 4871 public void stopKeepalive(Network network, int slot) { 4872 mHandler.sendMessage(mHandler.obtainMessage( 4873 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 4874 } 4875 4876 @Override 4877 public void factoryReset() { 4878 enforceConnectivityInternalPermission(); 4879 4880 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 4881 return; 4882 } 4883 4884 final int userId = UserHandle.getCallingUserId(); 4885 4886 // Turn airplane mode off 4887 setAirplaneMode(false); 4888 4889 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 4890 // Untether 4891 for (String tether : getTetheredIfaces()) { 4892 untether(tether); 4893 } 4894 } 4895 4896 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 4897 // Turn VPN off 4898 VpnConfig vpnConfig = getVpnConfig(userId); 4899 if (vpnConfig != null) { 4900 if (vpnConfig.legacy) { 4901 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 4902 } else { 4903 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 4904 // in the future without user intervention. 4905 setVpnPackageAuthorization(vpnConfig.user, userId, false); 4906 4907 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN, userId); 4908 } 4909 } 4910 } 4911 } 4912 4913 @VisibleForTesting 4914 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 4915 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 4916 return new NetworkMonitor(context, handler, nai, defaultRequest); 4917 } 4918 4919} 4920