ConnectivityService.java revision a4aba6eaf57ab0c41c03368eb7dae1abeba07273
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 31import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 32import static android.net.NetworkPolicyManager.RULE_ALLOW_METERED; 33import static android.net.NetworkPolicyManager.MASK_METERED_NETWORKS; 34import static android.net.NetworkPolicyManager.MASK_ALL_NETWORKS; 35import static android.net.NetworkPolicyManager.RULE_NONE; 36import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 37import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 38import static android.net.NetworkPolicyManager.RULE_TEMPORARY_ALLOW_METERED; 39import static android.net.NetworkPolicyManager.uidRulesToString; 40 41import android.annotation.Nullable; 42import android.app.BroadcastOptions; 43import android.app.Notification; 44import android.app.NotificationManager; 45import android.app.PendingIntent; 46import android.content.BroadcastReceiver; 47import android.content.ContentResolver; 48import android.content.Context; 49import android.content.Intent; 50import android.content.IntentFilter; 51import android.content.pm.PackageManager; 52import android.content.res.Configuration; 53import android.content.res.Resources; 54import android.database.ContentObserver; 55import android.net.ConnectivityManager; 56import android.net.ConnectivityManager.PacketKeepalive; 57import android.net.IConnectivityManager; 58import android.net.INetworkManagementEventObserver; 59import android.net.INetworkPolicyListener; 60import android.net.INetworkPolicyManager; 61import android.net.INetworkStatsService; 62import android.net.LinkProperties; 63import android.net.LinkProperties.CompareResult; 64import android.net.Network; 65import android.net.NetworkAgent; 66import android.net.NetworkCapabilities; 67import android.net.NetworkConfig; 68import android.net.NetworkInfo; 69import android.net.NetworkInfo.DetailedState; 70import android.net.NetworkMisc; 71import android.net.NetworkQuotaInfo; 72import android.net.NetworkRequest; 73import android.net.NetworkState; 74import android.net.NetworkUtils; 75import android.net.Proxy; 76import android.net.ProxyInfo; 77import android.net.RouteInfo; 78import android.net.UidRange; 79import android.net.Uri; 80import android.net.metrics.DefaultNetworkEvent; 81import android.net.metrics.NetworkEvent; 82import android.os.Binder; 83import android.os.Build; 84import android.os.Bundle; 85import android.os.FileUtils; 86import android.os.Handler; 87import android.os.HandlerThread; 88import android.os.IBinder; 89import android.os.INetworkManagementService; 90import android.os.Looper; 91import android.os.Message; 92import android.os.Messenger; 93import android.os.ParcelFileDescriptor; 94import android.os.PowerManager; 95import android.os.Process; 96import android.os.RemoteException; 97import android.os.ResultReceiver; 98import android.os.SystemProperties; 99import android.os.UserHandle; 100import android.os.UserManager; 101import android.provider.Settings; 102import android.security.Credentials; 103import android.security.KeyStore; 104import android.telephony.TelephonyManager; 105import android.text.TextUtils; 106import android.util.ArraySet; 107import android.util.LocalLog; 108import android.util.LocalLog.ReadOnlyLocalLog; 109import android.util.Log; 110import android.util.Pair; 111import android.util.Slog; 112import android.util.SparseArray; 113import android.util.SparseBooleanArray; 114import android.util.SparseIntArray; 115import android.util.Xml; 116 117import com.android.internal.R; 118import com.android.internal.annotations.GuardedBy; 119import com.android.internal.annotations.VisibleForTesting; 120import com.android.internal.app.IBatteryStats; 121import com.android.internal.net.LegacyVpnInfo; 122import com.android.internal.net.NetworkStatsFactory; 123import com.android.internal.net.VpnConfig; 124import com.android.internal.net.VpnInfo; 125import com.android.internal.net.VpnProfile; 126import com.android.internal.util.AsyncChannel; 127import com.android.internal.util.IndentingPrintWriter; 128import com.android.internal.util.MessageUtils; 129import com.android.internal.util.XmlUtils; 130import com.android.server.am.BatteryStatsService; 131import com.android.server.connectivity.DataConnectionStats; 132import com.android.server.connectivity.KeepaliveTracker; 133import com.android.server.connectivity.Nat464Xlat; 134import com.android.server.connectivity.NetworkAgentInfo; 135import com.android.server.connectivity.NetworkDiagnostics; 136import com.android.server.connectivity.NetworkMonitor; 137import com.android.server.connectivity.PacManager; 138import com.android.server.connectivity.PermissionMonitor; 139import com.android.server.connectivity.Tethering; 140import com.android.server.connectivity.Vpn; 141import com.android.server.net.BaseNetworkObserver; 142import com.android.server.net.LockdownVpnTracker; 143 144import com.google.android.collect.Lists; 145 146import org.xmlpull.v1.XmlPullParser; 147import org.xmlpull.v1.XmlPullParserException; 148 149import java.io.File; 150import java.io.FileDescriptor; 151import java.io.FileNotFoundException; 152import java.io.FileReader; 153import java.io.IOException; 154import java.io.PrintWriter; 155import java.net.Inet4Address; 156import java.net.InetAddress; 157import java.net.UnknownHostException; 158import java.util.ArrayDeque; 159import java.util.ArrayList; 160import java.util.Arrays; 161import java.util.Collection; 162import java.util.HashMap; 163import java.util.HashSet; 164import java.util.List; 165import java.util.Map; 166import java.util.Objects; 167import java.util.SortedSet; 168import java.util.TreeSet; 169 170/** 171 * @hide 172 */ 173public class ConnectivityService extends IConnectivityManager.Stub 174 implements PendingIntent.OnFinished { 175 private static final String TAG = "ConnectivityService"; 176 177 private static final boolean DBG = true; 178 private static final boolean VDBG = false; 179 180 private static final boolean LOGD_RULES = false; 181 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 182 183 // TODO: create better separation between radio types and network types 184 185 // how long to wait before switching back to a radio's default network 186 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 187 // system property that can override the above value 188 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 189 "android.telephony.apn-restore"; 190 191 // How long to wait before putting up a "This network doesn't have an Internet connection, 192 // connect anyway?" dialog after the user selects a network that doesn't validate. 193 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 194 195 // How long to delay to removal of a pending intent based request. 196 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 197 private final int mReleasePendingIntentDelayMs; 198 199 private Tethering mTethering; 200 201 private final PermissionMonitor mPermissionMonitor; 202 203 private KeyStore mKeyStore; 204 205 @GuardedBy("mVpns") 206 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 207 208 private boolean mLockdownEnabled; 209 private LockdownVpnTracker mLockdownTracker; 210 211 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 212 private Object mRulesLock = new Object(); 213 /** Currently active network rules by UID. */ 214 @GuardedBy("mRulesLock") 215 private SparseIntArray mUidRules = new SparseIntArray(); 216 /** Set of ifaces that are costly. */ 217 @GuardedBy("mRulesLock") 218 private ArraySet<String> mMeteredIfaces = new ArraySet<>(); 219 /** Flag indicating if background data is restricted. */ 220 @GuardedBy("mRulesLock") 221 private boolean mRestrictBackground; 222 223 final private Context mContext; 224 private int mNetworkPreference; 225 // 0 is full bad, 100 is full good 226 private int mDefaultInetConditionPublished = 0; 227 228 private int mNumDnsEntries; 229 230 private boolean mTestMode; 231 private static ConnectivityService sServiceInstance; 232 233 private INetworkManagementService mNetd; 234 private INetworkStatsService mStatsService; 235 private INetworkPolicyManager mPolicyManager; 236 237 private String mCurrentTcpBufferSizes; 238 239 private static final int ENABLED = 1; 240 private static final int DISABLED = 0; 241 242 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 243 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class }); 244 245 private enum ReapUnvalidatedNetworks { 246 // Tear down networks that have no chance (e.g. even if validated) of becoming 247 // the highest scoring network satisfying a NetworkRequest. This should be passed when 248 // all networks have been rematched against all NetworkRequests. 249 REAP, 250 // Don't reap networks. This should be passed when some networks have not yet been 251 // rematched against all NetworkRequests. 252 DONT_REAP 253 }; 254 255 /** 256 * used internally to change our mobile data enabled flag 257 */ 258 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 259 260 /** 261 * used internally to clear a wakelock when transitioning 262 * from one net to another. Clear happens when we get a new 263 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 264 * after a timeout if no network is found (typically 1 min). 265 */ 266 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 267 268 /** 269 * used internally to reload global proxy settings 270 */ 271 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 272 273 /** 274 * PAC manager has received new port. 275 */ 276 private static final int EVENT_PROXY_HAS_CHANGED = 16; 277 278 /** 279 * used internally when registering NetworkFactories 280 * obj = NetworkFactoryInfo 281 */ 282 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 283 284 /** 285 * used internally when registering NetworkAgents 286 * obj = Messenger 287 */ 288 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 289 290 /** 291 * used to add a network request 292 * includes a NetworkRequestInfo 293 */ 294 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 295 296 /** 297 * indicates a timeout period is over - check if we had a network yet or not 298 * and if not, call the timeout calback (but leave the request live until they 299 * cancel it. 300 * includes a NetworkRequestInfo 301 */ 302 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 303 304 /** 305 * used to add a network listener - no request 306 * includes a NetworkRequestInfo 307 */ 308 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 309 310 /** 311 * used to remove a network request, either a listener or a real request 312 * arg1 = UID of caller 313 * obj = NetworkRequest 314 */ 315 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 316 317 /** 318 * used internally when registering NetworkFactories 319 * obj = Messenger 320 */ 321 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 322 323 /** 324 * used internally to expire a wakelock when transitioning 325 * from one net to another. Expire happens when we fail to find 326 * a new network (typically after 1 minute) - 327 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 328 * a replacement network. 329 */ 330 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 331 332 /** 333 * Used internally to indicate the system is ready. 334 */ 335 private static final int EVENT_SYSTEM_READY = 25; 336 337 /** 338 * used to add a network request with a pending intent 339 * obj = NetworkRequestInfo 340 */ 341 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 342 343 /** 344 * used to remove a pending intent and its associated network request. 345 * arg1 = UID of caller 346 * obj = PendingIntent 347 */ 348 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 349 350 /** 351 * used to specify whether a network should be used even if unvalidated. 352 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 353 * arg2 = whether to remember this choice in the future (1 or 0) 354 * obj = network 355 */ 356 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 357 358 /** 359 * used to ask the user to confirm a connection to an unvalidated network. 360 * obj = network 361 */ 362 private static final int EVENT_PROMPT_UNVALIDATED = 29; 363 364 /** 365 * used internally to (re)configure mobile data always-on settings. 366 */ 367 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 368 369 /** 370 * used to add a network listener with a pending intent 371 * obj = NetworkRequestInfo 372 */ 373 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 374 375 /** Handler thread used for both of the handlers below. */ 376 @VisibleForTesting 377 protected final HandlerThread mHandlerThread; 378 /** Handler used for internal events. */ 379 final private InternalHandler mHandler; 380 /** Handler used for incoming {@link NetworkStateTracker} events. */ 381 final private NetworkStateTrackerHandler mTrackerHandler; 382 383 private boolean mSystemReady; 384 private Intent mInitialBroadcast; 385 386 private PowerManager.WakeLock mNetTransitionWakeLock; 387 private String mNetTransitionWakeLockCausedBy = ""; 388 private int mNetTransitionWakeLockSerialNumber; 389 private int mNetTransitionWakeLockTimeout; 390 private final PowerManager.WakeLock mPendingIntentWakeLock; 391 392 // used in DBG mode to track inet condition reports 393 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 394 private ArrayList mInetLog; 395 396 // track the current default http proxy - tell the world if we get a new one (real change) 397 private volatile ProxyInfo mDefaultProxy = null; 398 private Object mProxyLock = new Object(); 399 private boolean mDefaultProxyDisabled = false; 400 401 // track the global proxy. 402 private ProxyInfo mGlobalProxy = null; 403 404 private PacManager mPacManager = null; 405 406 final private SettingsObserver mSettingsObserver; 407 408 private UserManager mUserManager; 409 410 NetworkConfig[] mNetConfigs; 411 int mNetworksDefined; 412 413 // the set of network types that can only be enabled by system/sig apps 414 List mProtectedNetworks; 415 416 private DataConnectionStats mDataConnectionStats; 417 418 TelephonyManager mTelephonyManager; 419 420 private KeepaliveTracker mKeepaliveTracker; 421 422 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 423 private final static int MIN_NET_ID = 100; // some reserved marks 424 private final static int MAX_NET_ID = 65535; 425 private int mNextNetId = MIN_NET_ID; 426 427 // sequence number of NetworkRequests 428 private int mNextNetworkRequestId = 1; 429 430 // NetworkRequest activity String log entries. 431 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 432 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 433 434 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 435 private static final int MAX_VALIDATION_LOGS = 10; 436 private final ArrayDeque<Pair<Network,ReadOnlyLocalLog>> mValidationLogs = 437 new ArrayDeque<Pair<Network,ReadOnlyLocalLog>>(MAX_VALIDATION_LOGS); 438 439 private void addValidationLogs(ReadOnlyLocalLog log, Network network) { 440 synchronized(mValidationLogs) { 441 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 442 mValidationLogs.removeLast(); 443 } 444 mValidationLogs.addFirst(new Pair(network, log)); 445 } 446 } 447 448 /** 449 * Implements support for the legacy "one network per network type" model. 450 * 451 * We used to have a static array of NetworkStateTrackers, one for each 452 * network type, but that doesn't work any more now that we can have, 453 * for example, more that one wifi network. This class stores all the 454 * NetworkAgentInfo objects that support a given type, but the legacy 455 * API will only see the first one. 456 * 457 * It serves two main purposes: 458 * 459 * 1. Provide information about "the network for a given type" (since this 460 * API only supports one). 461 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 462 * the first network for a given type changes, or if the default network 463 * changes. 464 */ 465 private class LegacyTypeTracker { 466 467 private static final boolean DBG = true; 468 private static final boolean VDBG = false; 469 470 /** 471 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 472 * Each list holds references to all NetworkAgentInfos that are used to 473 * satisfy requests for that network type. 474 * 475 * This array is built out at startup such that an unsupported network 476 * doesn't get an ArrayList instance, making this a tristate: 477 * unsupported, supported but not active and active. 478 * 479 * The actual lists are populated when we scan the network types that 480 * are supported on this device. 481 */ 482 private ArrayList<NetworkAgentInfo> mTypeLists[]; 483 484 public LegacyTypeTracker() { 485 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 486 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 487 } 488 489 public void addSupportedType(int type) { 490 if (mTypeLists[type] != null) { 491 throw new IllegalStateException( 492 "legacy list for type " + type + "already initialized"); 493 } 494 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 495 } 496 497 public boolean isTypeSupported(int type) { 498 return isNetworkTypeValid(type) && mTypeLists[type] != null; 499 } 500 501 public NetworkAgentInfo getNetworkForType(int type) { 502 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 503 return mTypeLists[type].get(0); 504 } else { 505 return null; 506 } 507 } 508 509 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 510 boolean isDefaultNetwork) { 511 if (DBG) { 512 log("Sending " + state + 513 " broadcast for type " + type + " " + nai.name() + 514 " isDefaultNetwork=" + isDefaultNetwork); 515 } 516 } 517 518 /** Adds the given network to the specified legacy type list. */ 519 public void add(int type, NetworkAgentInfo nai) { 520 if (!isTypeSupported(type)) { 521 return; // Invalid network type. 522 } 523 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 524 525 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 526 if (list.contains(nai)) { 527 return; 528 } 529 530 list.add(nai); 531 532 // Send a broadcast if this is the first network of its type or if it's the default. 533 final boolean isDefaultNetwork = isDefaultNetwork(nai); 534 if (list.size() == 1 || isDefaultNetwork) { 535 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 536 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 537 } 538 } 539 540 /** Removes the given network from the specified legacy type list. */ 541 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 542 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 543 if (list == null || list.isEmpty()) { 544 return; 545 } 546 547 final boolean wasFirstNetwork = list.get(0).equals(nai); 548 549 if (!list.remove(nai)) { 550 return; 551 } 552 553 final DetailedState state = DetailedState.DISCONNECTED; 554 555 if (wasFirstNetwork || wasDefault) { 556 maybeLogBroadcast(nai, state, type, wasDefault); 557 sendLegacyNetworkBroadcast(nai, state, type); 558 } 559 560 if (!list.isEmpty() && wasFirstNetwork) { 561 if (DBG) log("Other network available for type " + type + 562 ", sending connected broadcast"); 563 final NetworkAgentInfo replacement = list.get(0); 564 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 565 sendLegacyNetworkBroadcast(replacement, state, type); 566 } 567 } 568 569 /** Removes the given network from all legacy type lists. */ 570 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 571 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 572 for (int type = 0; type < mTypeLists.length; type++) { 573 remove(type, nai, wasDefault); 574 } 575 } 576 577 // send out another legacy broadcast - currently only used for suspend/unsuspend 578 // toggle 579 public void update(NetworkAgentInfo nai) { 580 final boolean isDefault = isDefaultNetwork(nai); 581 final DetailedState state = nai.networkInfo.getDetailedState(); 582 for (int type = 0; type < mTypeLists.length; type++) { 583 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 584 final boolean contains = (list != null && list.contains(nai)); 585 final boolean isFirst = (list != null && list.size() > 0 && nai == list.get(0)); 586 if (isFirst || (contains && isDefault)) { 587 maybeLogBroadcast(nai, state, type, isDefault); 588 sendLegacyNetworkBroadcast(nai, state, type); 589 } 590 } 591 } 592 593 private String naiToString(NetworkAgentInfo nai) { 594 String name = (nai != null) ? nai.name() : "null"; 595 String state = (nai.networkInfo != null) ? 596 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 597 "???/???"; 598 return name + " " + state; 599 } 600 601 public void dump(IndentingPrintWriter pw) { 602 pw.println("mLegacyTypeTracker:"); 603 pw.increaseIndent(); 604 pw.print("Supported types:"); 605 for (int type = 0; type < mTypeLists.length; type++) { 606 if (mTypeLists[type] != null) pw.print(" " + type); 607 } 608 pw.println(); 609 pw.println("Current state:"); 610 pw.increaseIndent(); 611 for (int type = 0; type < mTypeLists.length; type++) { 612 if (mTypeLists[type] == null|| mTypeLists[type].size() == 0) continue; 613 for (NetworkAgentInfo nai : mTypeLists[type]) { 614 pw.println(type + " " + naiToString(nai)); 615 } 616 } 617 pw.decreaseIndent(); 618 pw.decreaseIndent(); 619 pw.println(); 620 } 621 } 622 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 623 624 @VisibleForTesting 625 protected HandlerThread createHandlerThread() { 626 return new HandlerThread("ConnectivityServiceThread"); 627 } 628 629 public ConnectivityService(Context context, INetworkManagementService netManager, 630 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 631 if (DBG) log("ConnectivityService starting up"); 632 633 mDefaultRequest = createInternetRequestForTransport(-1); 634 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, 635 new Binder(), NetworkRequestType.REQUEST); 636 mNetworkRequests.put(mDefaultRequest, defaultNRI); 637 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 638 639 mDefaultMobileDataRequest = createInternetRequestForTransport( 640 NetworkCapabilities.TRANSPORT_CELLULAR); 641 642 mHandlerThread = createHandlerThread(); 643 mHandlerThread.start(); 644 mHandler = new InternalHandler(mHandlerThread.getLooper()); 645 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 646 647 // setup our unique device name 648 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 649 String id = Settings.Secure.getString(context.getContentResolver(), 650 Settings.Secure.ANDROID_ID); 651 if (id != null && id.length() > 0) { 652 String name = new String("android-").concat(id); 653 SystemProperties.set("net.hostname", name); 654 } 655 } 656 657 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 658 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 659 660 mContext = checkNotNull(context, "missing Context"); 661 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 662 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 663 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 664 mKeyStore = KeyStore.getInstance(); 665 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 666 667 try { 668 mPolicyManager.setConnectivityListener(mPolicyListener); 669 mRestrictBackground = mPolicyManager.getRestrictBackground(); 670 } catch (RemoteException e) { 671 // ouch, no rules updates means some processes may never get network 672 loge("unable to register INetworkPolicyListener" + e); 673 } 674 675 final PowerManager powerManager = (PowerManager) context.getSystemService( 676 Context.POWER_SERVICE); 677 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 678 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 679 com.android.internal.R.integer.config_networkTransitionTimeout); 680 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 681 682 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 683 684 // TODO: What is the "correct" way to do determine if this is a wifi only device? 685 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 686 log("wifiOnly=" + wifiOnly); 687 String[] naStrings = context.getResources().getStringArray( 688 com.android.internal.R.array.networkAttributes); 689 for (String naString : naStrings) { 690 try { 691 NetworkConfig n = new NetworkConfig(naString); 692 if (VDBG) log("naString=" + naString + " config=" + n); 693 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 694 loge("Error in networkAttributes - ignoring attempt to define type " + 695 n.type); 696 continue; 697 } 698 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 699 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 700 n.type); 701 continue; 702 } 703 if (mNetConfigs[n.type] != null) { 704 loge("Error in networkAttributes - ignoring attempt to redefine type " + 705 n.type); 706 continue; 707 } 708 mLegacyTypeTracker.addSupportedType(n.type); 709 710 mNetConfigs[n.type] = n; 711 mNetworksDefined++; 712 } catch(Exception e) { 713 // ignore it - leave the entry null 714 } 715 } 716 717 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 718 if (mNetConfigs[TYPE_VPN] == null) { 719 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 720 // don't need to add TYPE_VPN to mNetConfigs. 721 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 722 mNetworksDefined++; // used only in the log() statement below. 723 } 724 725 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 726 727 mProtectedNetworks = new ArrayList<Integer>(); 728 int[] protectedNetworks = context.getResources().getIntArray( 729 com.android.internal.R.array.config_protectedNetworks); 730 for (int p : protectedNetworks) { 731 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 732 mProtectedNetworks.add(p); 733 } else { 734 if (DBG) loge("Ignoring protectedNetwork " + p); 735 } 736 } 737 738 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 739 && SystemProperties.get("ro.build.type").equals("eng"); 740 741 mTethering = new Tethering(mContext, mNetd, statsService); 742 743 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 744 745 //set up the listener for user state for creating user VPNs 746 IntentFilter intentFilter = new IntentFilter(); 747 intentFilter.addAction(Intent.ACTION_USER_STARTED); 748 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 749 intentFilter.addAction(Intent.ACTION_USER_ADDED); 750 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 751 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 752 mContext.registerReceiverAsUser( 753 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 754 755 try { 756 mNetd.registerObserver(mTethering); 757 mNetd.registerObserver(mDataActivityObserver); 758 } catch (RemoteException e) { 759 loge("Error registering observer :" + e); 760 } 761 762 if (DBG) { 763 mInetLog = new ArrayList(); 764 } 765 766 mSettingsObserver = new SettingsObserver(mContext, mHandler); 767 registerSettingsCallbacks(); 768 769 mDataConnectionStats = new DataConnectionStats(mContext); 770 mDataConnectionStats.startMonitoring(); 771 772 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 773 774 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 775 776 mKeepaliveTracker = new KeepaliveTracker(mHandler); 777 } 778 779 private NetworkRequest createInternetRequestForTransport(int transportType) { 780 NetworkCapabilities netCap = new NetworkCapabilities(); 781 netCap.addCapability(NET_CAPABILITY_INTERNET); 782 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 783 if (transportType > -1) { 784 netCap.addTransportType(transportType); 785 } 786 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 787 } 788 789 private void handleMobileDataAlwaysOn() { 790 final boolean enable = (Settings.Global.getInt( 791 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 792 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 793 if (enable == isEnabled) { 794 return; // Nothing to do. 795 } 796 797 if (enable) { 798 handleRegisterNetworkRequest(new NetworkRequestInfo( 799 null, mDefaultMobileDataRequest, new Binder(), NetworkRequestType.REQUEST)); 800 } else { 801 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 802 } 803 } 804 805 private void registerSettingsCallbacks() { 806 // Watch for global HTTP proxy changes. 807 mSettingsObserver.observe( 808 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 809 EVENT_APPLY_GLOBAL_HTTP_PROXY); 810 811 // Watch for whether or not to keep mobile data always on. 812 mSettingsObserver.observe( 813 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 814 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 815 } 816 817 private synchronized int nextNetworkRequestId() { 818 return mNextNetworkRequestId++; 819 } 820 821 @VisibleForTesting 822 protected int reserveNetId() { 823 synchronized (mNetworkForNetId) { 824 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 825 int netId = mNextNetId; 826 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 827 // Make sure NetID unused. http://b/16815182 828 if (!mNetIdInUse.get(netId)) { 829 mNetIdInUse.put(netId, true); 830 return netId; 831 } 832 } 833 } 834 throw new IllegalStateException("No free netIds"); 835 } 836 837 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 838 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 839 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 840 final NetworkState state; 841 if (nai != null) { 842 state = nai.getNetworkState(); 843 state.networkInfo.setType(networkType); 844 } else { 845 final NetworkInfo info = new NetworkInfo(networkType, 0, 846 getNetworkTypeName(networkType), ""); 847 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 848 info.setIsAvailable(true); 849 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 850 null, null, null); 851 } 852 filterNetworkStateForUid(state, uid, ignoreBlocked); 853 return state; 854 } else { 855 return NetworkState.EMPTY; 856 } 857 } 858 859 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 860 if (network == null) { 861 return null; 862 } 863 synchronized (mNetworkForNetId) { 864 return mNetworkForNetId.get(network.netId); 865 } 866 } 867 868 private Network[] getVpnUnderlyingNetworks(int uid) { 869 if (!mLockdownEnabled) { 870 int user = UserHandle.getUserId(uid); 871 synchronized (mVpns) { 872 Vpn vpn = mVpns.get(user); 873 if (vpn != null && vpn.appliesToUid(uid)) { 874 return vpn.getUnderlyingNetworks(); 875 } 876 } 877 } 878 return null; 879 } 880 881 private NetworkState getUnfilteredActiveNetworkState(int uid) { 882 NetworkAgentInfo nai = getDefaultNetwork(); 883 884 final Network[] networks = getVpnUnderlyingNetworks(uid); 885 if (networks != null) { 886 // getUnderlyingNetworks() returns: 887 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 888 // empty array => the VPN explicitly said "no default network". 889 // non-empty array => the VPN specified one or more default networks; we use the 890 // first one. 891 if (networks.length > 0) { 892 nai = getNetworkAgentInfoForNetwork(networks[0]); 893 } else { 894 nai = null; 895 } 896 } 897 898 if (nai != null) { 899 return nai.getNetworkState(); 900 } else { 901 return NetworkState.EMPTY; 902 } 903 } 904 905 /** 906 * Check if UID should be blocked from using the network with the given LinkProperties. 907 */ 908 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 909 boolean ignoreBlocked) { 910 // Networks aren't blocked when ignoring blocked status 911 if (ignoreBlocked) return false; 912 // Networks are never blocked for system services 913 if (uid < Process.FIRST_APPLICATION_UID) return false; 914 915 final boolean networkMetered; 916 final int uidRules; 917 918 synchronized (mVpns) { 919 final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); 920 if (vpn != null && vpn.isBlockingUid(uid)) { 921 return true; 922 } 923 } 924 925 final String iface = (lp == null ? "" : lp.getInterfaceName()); 926 synchronized (mRulesLock) { 927 networkMetered = mMeteredIfaces.contains(iface); 928 uidRules = mUidRules.get(uid, RULE_NONE); 929 } 930 931 boolean allowed = true; 932 // Check Data Saver Mode first... 933 if (networkMetered) { 934 if ((uidRules & RULE_REJECT_METERED) != 0) { 935 if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); 936 // Explicitly blacklisted. 937 allowed = false; 938 } else { 939 allowed = !mRestrictBackground 940 || (uidRules & RULE_ALLOW_METERED) != 0 941 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; 942 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 943 + " mRestrictBackground=" + mRestrictBackground 944 + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) 945 + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" 946 + ": " + allowed); 947 } 948 } 949 // ...then power restrictions. 950 if (allowed) { 951 allowed = (uidRules & RULE_REJECT_ALL) == 0; 952 if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" 953 + " rule is " + uidRulesToString(uidRules) + ": " + allowed); 954 } 955 return !allowed; 956 } 957 958 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 959 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) return; 960 boolean removed = false; 961 boolean added = false; 962 synchronized (mBlockedAppUids) { 963 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 964 added = true; 965 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 966 removed = true; 967 } 968 } 969 if (added) log("Returning blocked NetworkInfo to uid=" + uid); 970 else if (removed) log("Returning unblocked NetworkInfo to uid=" + uid); 971 } 972 973 /** 974 * Apply any relevant filters to {@link NetworkState} for the given UID. For 975 * example, this may mark the network as {@link DetailedState#BLOCKED} based 976 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 977 * {@link NetworkInfo#isMetered()} based on network policies. 978 */ 979 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 980 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 981 982 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 983 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 984 } 985 if (mLockdownTracker != null) { 986 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 987 } 988 989 // TODO: apply metered state closer to NetworkAgentInfo 990 final long token = Binder.clearCallingIdentity(); 991 try { 992 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 993 } catch (RemoteException e) { 994 } finally { 995 Binder.restoreCallingIdentity(token); 996 } 997 } 998 999 /** 1000 * Return NetworkInfo for the active (i.e., connected) network interface. 1001 * It is assumed that at most one network is active at a time. If more 1002 * than one is active, it is indeterminate which will be returned. 1003 * @return the info for the active network, or {@code null} if none is 1004 * active 1005 */ 1006 @Override 1007 public NetworkInfo getActiveNetworkInfo() { 1008 enforceAccessPermission(); 1009 final int uid = Binder.getCallingUid(); 1010 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1011 filterNetworkStateForUid(state, uid, false); 1012 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 1013 return state.networkInfo; 1014 } 1015 1016 @Override 1017 public Network getActiveNetwork() { 1018 enforceAccessPermission(); 1019 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1020 } 1021 1022 @Override 1023 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1024 enforceConnectivityInternalPermission(); 1025 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1026 } 1027 1028 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1029 final int user = UserHandle.getUserId(uid); 1030 int vpnNetId = NETID_UNSET; 1031 synchronized (mVpns) { 1032 final Vpn vpn = mVpns.get(user); 1033 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1034 } 1035 NetworkAgentInfo nai; 1036 if (vpnNetId != NETID_UNSET) { 1037 synchronized (mNetworkForNetId) { 1038 nai = mNetworkForNetId.get(vpnNetId); 1039 } 1040 if (nai != null) return nai.network; 1041 } 1042 nai = getDefaultNetwork(); 1043 if (nai != null 1044 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1045 nai = null; 1046 } 1047 return nai != null ? nai.network : null; 1048 } 1049 1050 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1051 enforceAccessPermission(); 1052 final int uid = Binder.getCallingUid(); 1053 NetworkState state = getUnfilteredActiveNetworkState(uid); 1054 return state.networkInfo; 1055 } 1056 1057 @Override 1058 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1059 enforceConnectivityInternalPermission(); 1060 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1061 filterNetworkStateForUid(state, uid, ignoreBlocked); 1062 return state.networkInfo; 1063 } 1064 1065 @Override 1066 public NetworkInfo getNetworkInfo(int networkType) { 1067 enforceAccessPermission(); 1068 final int uid = Binder.getCallingUid(); 1069 if (getVpnUnderlyingNetworks(uid) != null) { 1070 // A VPN is active, so we may need to return one of its underlying networks. This 1071 // information is not available in LegacyTypeTracker, so we have to get it from 1072 // getUnfilteredActiveNetworkState. 1073 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1074 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1075 filterNetworkStateForUid(state, uid, false); 1076 return state.networkInfo; 1077 } 1078 } 1079 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1080 return state.networkInfo; 1081 } 1082 1083 @Override 1084 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1085 enforceAccessPermission(); 1086 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1087 if (nai != null) { 1088 final NetworkState state = nai.getNetworkState(); 1089 filterNetworkStateForUid(state, uid, ignoreBlocked); 1090 return state.networkInfo; 1091 } else { 1092 return null; 1093 } 1094 } 1095 1096 @Override 1097 public NetworkInfo[] getAllNetworkInfo() { 1098 enforceAccessPermission(); 1099 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1100 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1101 networkType++) { 1102 NetworkInfo info = getNetworkInfo(networkType); 1103 if (info != null) { 1104 result.add(info); 1105 } 1106 } 1107 return result.toArray(new NetworkInfo[result.size()]); 1108 } 1109 1110 @Override 1111 public Network getNetworkForType(int networkType) { 1112 enforceAccessPermission(); 1113 final int uid = Binder.getCallingUid(); 1114 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1115 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1116 return state.network; 1117 } 1118 return null; 1119 } 1120 1121 @Override 1122 public Network[] getAllNetworks() { 1123 enforceAccessPermission(); 1124 synchronized (mNetworkForNetId) { 1125 final Network[] result = new Network[mNetworkForNetId.size()]; 1126 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1127 result[i] = mNetworkForNetId.valueAt(i).network; 1128 } 1129 return result; 1130 } 1131 } 1132 1133 @Override 1134 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1135 // The basic principle is: if an app's traffic could possibly go over a 1136 // network, without the app doing anything multinetwork-specific, 1137 // (hence, by "default"), then include that network's capabilities in 1138 // the array. 1139 // 1140 // In the normal case, app traffic only goes over the system's default 1141 // network connection, so that's the only network returned. 1142 // 1143 // With a VPN in force, some app traffic may go into the VPN, and thus 1144 // over whatever underlying networks the VPN specifies, while other app 1145 // traffic may go over the system default network (e.g.: a split-tunnel 1146 // VPN, or an app disallowed by the VPN), so the set of networks 1147 // returned includes the VPN's underlying networks and the system 1148 // default. 1149 enforceAccessPermission(); 1150 1151 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1152 1153 NetworkAgentInfo nai = getDefaultNetwork(); 1154 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1155 if (nc != null) { 1156 result.put(nai.network, nc); 1157 } 1158 1159 if (!mLockdownEnabled) { 1160 synchronized (mVpns) { 1161 Vpn vpn = mVpns.get(userId); 1162 if (vpn != null) { 1163 Network[] networks = vpn.getUnderlyingNetworks(); 1164 if (networks != null) { 1165 for (Network network : networks) { 1166 nai = getNetworkAgentInfoForNetwork(network); 1167 nc = getNetworkCapabilitiesInternal(nai); 1168 if (nc != null) { 1169 result.put(network, nc); 1170 } 1171 } 1172 } 1173 } 1174 } 1175 } 1176 1177 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1178 out = result.values().toArray(out); 1179 return out; 1180 } 1181 1182 @Override 1183 public boolean isNetworkSupported(int networkType) { 1184 enforceAccessPermission(); 1185 return mLegacyTypeTracker.isTypeSupported(networkType); 1186 } 1187 1188 /** 1189 * Return LinkProperties for the active (i.e., connected) default 1190 * network interface. It is assumed that at most one default network 1191 * is active at a time. If more than one is active, it is indeterminate 1192 * which will be returned. 1193 * @return the ip properties for the active network, or {@code null} if 1194 * none is active 1195 */ 1196 @Override 1197 public LinkProperties getActiveLinkProperties() { 1198 enforceAccessPermission(); 1199 final int uid = Binder.getCallingUid(); 1200 NetworkState state = getUnfilteredActiveNetworkState(uid); 1201 return state.linkProperties; 1202 } 1203 1204 @Override 1205 public LinkProperties getLinkPropertiesForType(int networkType) { 1206 enforceAccessPermission(); 1207 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1208 if (nai != null) { 1209 synchronized (nai) { 1210 return new LinkProperties(nai.linkProperties); 1211 } 1212 } 1213 return null; 1214 } 1215 1216 // TODO - this should be ALL networks 1217 @Override 1218 public LinkProperties getLinkProperties(Network network) { 1219 enforceAccessPermission(); 1220 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1221 if (nai != null) { 1222 synchronized (nai) { 1223 return new LinkProperties(nai.linkProperties); 1224 } 1225 } 1226 return null; 1227 } 1228 1229 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1230 if (nai != null) { 1231 synchronized (nai) { 1232 if (nai.networkCapabilities != null) { 1233 return new NetworkCapabilities(nai.networkCapabilities); 1234 } 1235 } 1236 } 1237 return null; 1238 } 1239 1240 @Override 1241 public NetworkCapabilities getNetworkCapabilities(Network network) { 1242 enforceAccessPermission(); 1243 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1244 } 1245 1246 @Override 1247 public NetworkState[] getAllNetworkState() { 1248 // Require internal since we're handing out IMSI details 1249 enforceConnectivityInternalPermission(); 1250 1251 final ArrayList<NetworkState> result = Lists.newArrayList(); 1252 for (Network network : getAllNetworks()) { 1253 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1254 if (nai != null) { 1255 result.add(nai.getNetworkState()); 1256 } 1257 } 1258 return result.toArray(new NetworkState[result.size()]); 1259 } 1260 1261 @Override 1262 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1263 enforceAccessPermission(); 1264 final int uid = Binder.getCallingUid(); 1265 final long token = Binder.clearCallingIdentity(); 1266 try { 1267 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1268 if (state.networkInfo != null) { 1269 try { 1270 return mPolicyManager.getNetworkQuotaInfo(state); 1271 } catch (RemoteException e) { 1272 } 1273 } 1274 return null; 1275 } finally { 1276 Binder.restoreCallingIdentity(token); 1277 } 1278 } 1279 1280 @Override 1281 public boolean isActiveNetworkMetered() { 1282 enforceAccessPermission(); 1283 1284 final NetworkInfo info = getActiveNetworkInfo(); 1285 return (info != null) ? info.isMetered() : false; 1286 } 1287 1288 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1289 @Override 1290 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1291 int deviceType = Integer.parseInt(label); 1292 sendDataActivityBroadcast(deviceType, active, tsNanos); 1293 } 1294 }; 1295 1296 /** 1297 * Ensure that a network route exists to deliver traffic to the specified 1298 * host via the specified network interface. 1299 * @param networkType the type of the network over which traffic to the 1300 * specified host is to be routed 1301 * @param hostAddress the IP address of the host to which the route is 1302 * desired 1303 * @return {@code true} on success, {@code false} on failure 1304 */ 1305 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1306 enforceChangePermission(); 1307 if (mProtectedNetworks.contains(networkType)) { 1308 enforceConnectivityInternalPermission(); 1309 } 1310 1311 InetAddress addr; 1312 try { 1313 addr = InetAddress.getByAddress(hostAddress); 1314 } catch (UnknownHostException e) { 1315 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1316 return false; 1317 } 1318 1319 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1320 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1321 return false; 1322 } 1323 1324 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1325 if (nai == null) { 1326 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1327 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1328 } else { 1329 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1330 } 1331 return false; 1332 } 1333 1334 DetailedState netState; 1335 synchronized (nai) { 1336 netState = nai.networkInfo.getDetailedState(); 1337 } 1338 1339 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1340 if (VDBG) { 1341 log("requestRouteToHostAddress on down network " 1342 + "(" + networkType + ") - dropped" 1343 + " netState=" + netState); 1344 } 1345 return false; 1346 } 1347 1348 final int uid = Binder.getCallingUid(); 1349 final long token = Binder.clearCallingIdentity(); 1350 try { 1351 LinkProperties lp; 1352 int netId; 1353 synchronized (nai) { 1354 lp = nai.linkProperties; 1355 netId = nai.network.netId; 1356 } 1357 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1358 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1359 return ok; 1360 } finally { 1361 Binder.restoreCallingIdentity(token); 1362 } 1363 } 1364 1365 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1366 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1367 if (bestRoute == null) { 1368 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1369 } else { 1370 String iface = bestRoute.getInterface(); 1371 if (bestRoute.getGateway().equals(addr)) { 1372 // if there is no better route, add the implied hostroute for our gateway 1373 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1374 } else { 1375 // if we will connect to this through another route, add a direct route 1376 // to it's gateway 1377 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1378 } 1379 } 1380 if (DBG) log("Adding legacy route " + bestRoute + 1381 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1382 try { 1383 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1384 } catch (Exception e) { 1385 // never crash - catch them all 1386 if (DBG) loge("Exception trying to add a route: " + e); 1387 return false; 1388 } 1389 return true; 1390 } 1391 1392 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1393 @Override 1394 public void onUidRulesChanged(int uid, int uidRules) { 1395 // caller is NPMS, since we only register with them 1396 if (LOGD_RULES) { 1397 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1398 } 1399 1400 synchronized (mRulesLock) { 1401 // skip update when we've already applied rules 1402 final int oldRules = mUidRules.get(uid, RULE_NONE); 1403 if (oldRules == uidRules) return; 1404 1405 if (uidRules == RULE_NONE) { 1406 mUidRules.delete(uid); 1407 } else { 1408 mUidRules.put(uid, uidRules); 1409 } 1410 } 1411 1412 // TODO: notify UID when it has requested targeted updates 1413 } 1414 1415 @Override 1416 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1417 // caller is NPMS, since we only register with them 1418 if (LOGD_RULES) { 1419 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1420 } 1421 1422 synchronized (mRulesLock) { 1423 mMeteredIfaces.clear(); 1424 for (String iface : meteredIfaces) { 1425 mMeteredIfaces.add(iface); 1426 } 1427 } 1428 } 1429 1430 @Override 1431 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1432 // caller is NPMS, since we only register with them 1433 if (LOGD_RULES) { 1434 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1435 } 1436 1437 synchronized (mRulesLock) { 1438 mRestrictBackground = restrictBackground; 1439 } 1440 1441 if (restrictBackground) { 1442 log("onRestrictBackgroundChanged(true): disabling tethering"); 1443 mTethering.untetherAll(); 1444 } 1445 } 1446 1447 @Override 1448 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1449 if (LOGD_RULES) { 1450 // caller is NPMS, since we only register with them 1451 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1452 + whitelisted + ")"); 1453 } 1454 } 1455 @Override 1456 public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { 1457 if (LOGD_RULES) { 1458 // caller is NPMS, since we only register with them 1459 log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" 1460 + blacklisted + ")"); 1461 } 1462 } 1463 }; 1464 1465 /** 1466 * Require that the caller is either in the same user or has appropriate permission to interact 1467 * across users. 1468 * 1469 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1470 */ 1471 private void enforceCrossUserPermission(int userId) { 1472 if (userId == UserHandle.getCallingUserId()) { 1473 // Not a cross-user call. 1474 return; 1475 } 1476 mContext.enforceCallingOrSelfPermission( 1477 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1478 "ConnectivityService"); 1479 } 1480 1481 private void enforceInternetPermission() { 1482 mContext.enforceCallingOrSelfPermission( 1483 android.Manifest.permission.INTERNET, 1484 "ConnectivityService"); 1485 } 1486 1487 private void enforceAccessPermission() { 1488 mContext.enforceCallingOrSelfPermission( 1489 android.Manifest.permission.ACCESS_NETWORK_STATE, 1490 "ConnectivityService"); 1491 } 1492 1493 private void enforceChangePermission() { 1494 ConnectivityManager.enforceChangePermission(mContext); 1495 } 1496 1497 private void enforceTetherAccessPermission() { 1498 mContext.enforceCallingOrSelfPermission( 1499 android.Manifest.permission.ACCESS_NETWORK_STATE, 1500 "ConnectivityService"); 1501 } 1502 1503 private void enforceConnectivityInternalPermission() { 1504 mContext.enforceCallingOrSelfPermission( 1505 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1506 "ConnectivityService"); 1507 } 1508 1509 private void enforceKeepalivePermission() { 1510 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1511 } 1512 1513 public void sendConnectedBroadcast(NetworkInfo info) { 1514 enforceConnectivityInternalPermission(); 1515 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1516 } 1517 1518 private void sendInetConditionBroadcast(NetworkInfo info) { 1519 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1520 } 1521 1522 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1523 if (mLockdownTracker != null) { 1524 info = new NetworkInfo(info); 1525 mLockdownTracker.augmentNetworkInfo(info); 1526 } 1527 1528 Intent intent = new Intent(bcastType); 1529 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1530 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1531 if (info.isFailover()) { 1532 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1533 info.setFailover(false); 1534 } 1535 if (info.getReason() != null) { 1536 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1537 } 1538 if (info.getExtraInfo() != null) { 1539 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1540 info.getExtraInfo()); 1541 } 1542 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1543 return intent; 1544 } 1545 1546 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1547 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1548 } 1549 1550 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1551 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1552 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1553 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1554 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1555 final long ident = Binder.clearCallingIdentity(); 1556 try { 1557 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1558 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1559 } finally { 1560 Binder.restoreCallingIdentity(ident); 1561 } 1562 } 1563 1564 private void sendStickyBroadcast(Intent intent) { 1565 synchronized(this) { 1566 if (!mSystemReady) { 1567 mInitialBroadcast = new Intent(intent); 1568 } 1569 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1570 if (VDBG) { 1571 log("sendStickyBroadcast: action=" + intent.getAction()); 1572 } 1573 1574 Bundle options = null; 1575 final long ident = Binder.clearCallingIdentity(); 1576 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1577 final NetworkInfo ni = intent.getParcelableExtra( 1578 ConnectivityManager.EXTRA_NETWORK_INFO); 1579 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1580 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1581 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1582 } else { 1583 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1584 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1585 options = opts.toBundle(); 1586 } 1587 final IBatteryStats bs = BatteryStatsService.getService(); 1588 try { 1589 bs.noteConnectivityChanged(intent.getIntExtra( 1590 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1591 ni != null ? ni.getState().toString() : "?"); 1592 } catch (RemoteException e) { 1593 } 1594 } 1595 try { 1596 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1597 } finally { 1598 Binder.restoreCallingIdentity(ident); 1599 } 1600 } 1601 } 1602 1603 void systemReady() { 1604 loadGlobalProxy(); 1605 1606 synchronized(this) { 1607 mSystemReady = true; 1608 if (mInitialBroadcast != null) { 1609 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1610 mInitialBroadcast = null; 1611 } 1612 } 1613 // load the global proxy at startup 1614 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1615 1616 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1617 // for user to unlock device too. 1618 updateLockdownVpn(); 1619 1620 // Configure whether mobile data is always on. 1621 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1622 1623 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1624 1625 mPermissionMonitor.startMonitoring(); 1626 } 1627 1628 /** 1629 * Setup data activity tracking for the given network. 1630 * 1631 * Every {@code setupDataActivityTracking} should be paired with a 1632 * {@link #removeDataActivityTracking} for cleanup. 1633 */ 1634 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1635 final String iface = networkAgent.linkProperties.getInterfaceName(); 1636 1637 final int timeout; 1638 int type = ConnectivityManager.TYPE_NONE; 1639 1640 if (networkAgent.networkCapabilities.hasTransport( 1641 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1642 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1643 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1644 10); 1645 type = ConnectivityManager.TYPE_MOBILE; 1646 } else if (networkAgent.networkCapabilities.hasTransport( 1647 NetworkCapabilities.TRANSPORT_WIFI)) { 1648 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1649 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1650 15); 1651 type = ConnectivityManager.TYPE_WIFI; 1652 } else { 1653 // do not track any other networks 1654 timeout = 0; 1655 } 1656 1657 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1658 try { 1659 mNetd.addIdleTimer(iface, timeout, type); 1660 } catch (Exception e) { 1661 // You shall not crash! 1662 loge("Exception in setupDataActivityTracking " + e); 1663 } 1664 } 1665 } 1666 1667 /** 1668 * Remove data activity tracking when network disconnects. 1669 */ 1670 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1671 final String iface = networkAgent.linkProperties.getInterfaceName(); 1672 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1673 1674 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1675 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1676 try { 1677 // the call fails silently if no idletimer setup for this interface 1678 mNetd.removeIdleTimer(iface); 1679 } catch (Exception e) { 1680 loge("Exception in removeDataActivityTracking " + e); 1681 } 1682 } 1683 } 1684 1685 /** 1686 * Reads the network specific MTU size from reources. 1687 * and set it on it's iface. 1688 */ 1689 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1690 final String iface = newLp.getInterfaceName(); 1691 final int mtu = newLp.getMtu(); 1692 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1693 if (VDBG) log("identical MTU - not setting"); 1694 return; 1695 } 1696 1697 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1698 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1699 return; 1700 } 1701 1702 // Cannot set MTU without interface name 1703 if (TextUtils.isEmpty(iface)) { 1704 loge("Setting MTU size with null iface."); 1705 return; 1706 } 1707 1708 try { 1709 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1710 mNetd.setMtu(iface, mtu); 1711 } catch (Exception e) { 1712 Slog.e(TAG, "exception in setMtu()" + e); 1713 } 1714 } 1715 1716 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1717 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1718 1719 // Overridden for testing purposes to avoid writing to SystemProperties. 1720 @VisibleForTesting 1721 protected int getDefaultTcpRwnd() { 1722 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1723 } 1724 1725 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1726 if (isDefaultNetwork(nai) == false) { 1727 return; 1728 } 1729 1730 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1731 String[] values = null; 1732 if (tcpBufferSizes != null) { 1733 values = tcpBufferSizes.split(","); 1734 } 1735 1736 if (values == null || values.length != 6) { 1737 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1738 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1739 values = tcpBufferSizes.split(","); 1740 } 1741 1742 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1743 1744 try { 1745 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1746 1747 final String prefix = "/sys/kernel/ipv4/tcp_"; 1748 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1749 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1750 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1751 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1752 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1753 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1754 mCurrentTcpBufferSizes = tcpBufferSizes; 1755 } catch (IOException e) { 1756 loge("Can't set TCP buffer sizes:" + e); 1757 } 1758 1759 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1760 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1761 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1762 if (rwndValue != 0) { 1763 SystemProperties.set(sysctlKey, rwndValue.toString()); 1764 } 1765 } 1766 1767 private void flushVmDnsCache() { 1768 /* 1769 * Tell the VMs to toss their DNS caches 1770 */ 1771 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1772 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1773 /* 1774 * Connectivity events can happen before boot has completed ... 1775 */ 1776 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1777 final long ident = Binder.clearCallingIdentity(); 1778 try { 1779 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1780 } finally { 1781 Binder.restoreCallingIdentity(ident); 1782 } 1783 } 1784 1785 @Override 1786 public int getRestoreDefaultNetworkDelay(int networkType) { 1787 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1788 NETWORK_RESTORE_DELAY_PROP_NAME); 1789 if(restoreDefaultNetworkDelayStr != null && 1790 restoreDefaultNetworkDelayStr.length() != 0) { 1791 try { 1792 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1793 } catch (NumberFormatException e) { 1794 } 1795 } 1796 // if the system property isn't set, use the value for the apn type 1797 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1798 1799 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1800 (mNetConfigs[networkType] != null)) { 1801 ret = mNetConfigs[networkType].restoreTime; 1802 } 1803 return ret; 1804 } 1805 1806 private boolean argsContain(String[] args, String target) { 1807 for (String arg : args) { 1808 if (arg.equals(target)) return true; 1809 } 1810 return false; 1811 } 1812 1813 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1814 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1815 final long DIAG_TIME_MS = 5000; 1816 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1817 // Start gathering diagnostic information. 1818 netDiags.add(new NetworkDiagnostics( 1819 nai.network, 1820 new LinkProperties(nai.linkProperties), // Must be a copy. 1821 DIAG_TIME_MS)); 1822 } 1823 1824 for (NetworkDiagnostics netDiag : netDiags) { 1825 pw.println(); 1826 netDiag.waitForMeasurements(); 1827 netDiag.dump(pw); 1828 } 1829 } 1830 1831 @Override 1832 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1833 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1834 if (mContext.checkCallingOrSelfPermission( 1835 android.Manifest.permission.DUMP) 1836 != PackageManager.PERMISSION_GRANTED) { 1837 pw.println("Permission Denial: can't dump ConnectivityService " + 1838 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1839 Binder.getCallingUid()); 1840 return; 1841 } 1842 1843 if (argsContain(args, "--diag")) { 1844 dumpNetworkDiagnostics(pw); 1845 return; 1846 } 1847 1848 pw.print("NetworkFactories for:"); 1849 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1850 pw.print(" " + nfi.name); 1851 } 1852 pw.println(); 1853 pw.println(); 1854 1855 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1856 pw.print("Active default network: "); 1857 if (defaultNai == null) { 1858 pw.println("none"); 1859 } else { 1860 pw.println(defaultNai.network.netId); 1861 } 1862 pw.println(); 1863 1864 pw.println("Current Networks:"); 1865 pw.increaseIndent(); 1866 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1867 pw.println(nai.toString()); 1868 pw.increaseIndent(); 1869 pw.println("Requests:"); 1870 pw.increaseIndent(); 1871 for (int i = 0; i < nai.networkRequests.size(); i++) { 1872 pw.println(nai.networkRequests.valueAt(i).toString()); 1873 } 1874 pw.decreaseIndent(); 1875 pw.println("Lingered:"); 1876 pw.increaseIndent(); 1877 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1878 pw.decreaseIndent(); 1879 pw.decreaseIndent(); 1880 } 1881 pw.decreaseIndent(); 1882 pw.println(); 1883 1884 pw.println("Metered Interfaces:"); 1885 pw.increaseIndent(); 1886 for (String value : mMeteredIfaces) { 1887 pw.println(value); 1888 } 1889 pw.decreaseIndent(); 1890 pw.println(); 1891 1892 pw.print("Restrict background: "); 1893 pw.println(mRestrictBackground); 1894 pw.println(); 1895 1896 pw.println("Status for known UIDs:"); 1897 pw.increaseIndent(); 1898 final int size = mUidRules.size(); 1899 for (int i = 0; i < size; i++) { 1900 final int uid = mUidRules.keyAt(i); 1901 pw.print("UID="); 1902 pw.print(uid); 1903 final int uidRules = mUidRules.get(uid, RULE_NONE); 1904 pw.print(" rules="); 1905 pw.print(uidRulesToString(uidRules)); 1906 pw.println(); 1907 } 1908 pw.println(); 1909 pw.decreaseIndent(); 1910 1911 pw.println("Network Requests:"); 1912 pw.increaseIndent(); 1913 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1914 pw.println(nri.toString()); 1915 } 1916 pw.println(); 1917 pw.decreaseIndent(); 1918 1919 mLegacyTypeTracker.dump(pw); 1920 1921 synchronized (this) { 1922 pw.print("mNetTransitionWakeLock: currently " + 1923 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1924 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1925 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1926 } else { 1927 pw.println(", last requested never"); 1928 } 1929 } 1930 1931 pw.println(); 1932 mTethering.dump(fd, pw, args); 1933 1934 pw.println(); 1935 mKeepaliveTracker.dump(pw); 1936 1937 pw.println(); 1938 1939 if (mInetLog != null && mInetLog.size() > 0) { 1940 pw.println(); 1941 pw.println("Inet condition reports:"); 1942 pw.increaseIndent(); 1943 for(int i = 0; i < mInetLog.size(); i++) { 1944 pw.println(mInetLog.get(i)); 1945 } 1946 pw.decreaseIndent(); 1947 } 1948 1949 if (argsContain(args, "--short") == false) { 1950 pw.println(); 1951 synchronized (mValidationLogs) { 1952 pw.println("mValidationLogs (most recent first):"); 1953 for (Pair<Network,ReadOnlyLocalLog> p : mValidationLogs) { 1954 pw.println(p.first); 1955 pw.increaseIndent(); 1956 p.second.dump(fd, pw, args); 1957 pw.decreaseIndent(); 1958 } 1959 } 1960 1961 pw.println(); 1962 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1963 pw.increaseIndent(); 1964 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1965 pw.decreaseIndent(); 1966 } 1967 } 1968 1969 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 1970 if (nai.network == null) return false; 1971 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1972 if (officialNai != null && officialNai.equals(nai)) return true; 1973 if (officialNai != null || VDBG) { 1974 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 1975 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1976 " - " + nai); 1977 } 1978 return false; 1979 } 1980 1981 private boolean isRequest(NetworkRequest request) { 1982 return mNetworkRequests.get(request).isRequest(); 1983 } 1984 1985 // must be stateless - things change under us. 1986 private class NetworkStateTrackerHandler extends Handler { 1987 public NetworkStateTrackerHandler(Looper looper) { 1988 super(looper); 1989 } 1990 1991 private boolean maybeHandleAsyncChannelMessage(Message msg) { 1992 switch (msg.what) { 1993 default: 1994 return false; 1995 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1996 handleAsyncChannelHalfConnect(msg); 1997 break; 1998 } 1999 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 2000 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2001 if (nai != null) nai.asyncChannel.disconnect(); 2002 break; 2003 } 2004 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 2005 handleAsyncChannelDisconnected(msg); 2006 break; 2007 } 2008 } 2009 return true; 2010 } 2011 2012 private void maybeHandleNetworkAgentMessage(Message msg) { 2013 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2014 if (nai == null) { 2015 if (VDBG) { 2016 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 2017 log(String.format("%s from unknown NetworkAgent", what)); 2018 } 2019 return; 2020 } 2021 2022 switch (msg.what) { 2023 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 2024 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 2025 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 2026 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 2027 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 2028 } 2029 if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( 2030 networkCapabilities)) { 2031 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 2032 + nai.networkCapabilities + " -> " + networkCapabilities); 2033 } 2034 updateCapabilities(nai, networkCapabilities); 2035 break; 2036 } 2037 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 2038 if (VDBG) { 2039 log("Update of LinkProperties for " + nai.name() + 2040 "; created=" + nai.created + 2041 "; everConnected=" + nai.everConnected); 2042 } 2043 LinkProperties oldLp = nai.linkProperties; 2044 synchronized (nai) { 2045 nai.linkProperties = (LinkProperties)msg.obj; 2046 } 2047 if (nai.everConnected) updateLinkProperties(nai, oldLp); 2048 break; 2049 } 2050 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2051 NetworkInfo info = (NetworkInfo) msg.obj; 2052 updateNetworkInfo(nai, info); 2053 break; 2054 } 2055 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2056 Integer score = (Integer) msg.obj; 2057 if (score != null) updateNetworkScore(nai, score.intValue()); 2058 break; 2059 } 2060 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2061 try { 2062 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2063 } catch (Exception e) { 2064 // Never crash! 2065 loge("Exception in addVpnUidRanges: " + e); 2066 } 2067 break; 2068 } 2069 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2070 try { 2071 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2072 } catch (Exception e) { 2073 // Never crash! 2074 loge("Exception in removeVpnUidRanges: " + e); 2075 } 2076 break; 2077 } 2078 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2079 if (nai.everConnected && !nai.networkMisc.explicitlySelected) { 2080 loge("ERROR: already-connected network explicitly selected."); 2081 } 2082 nai.networkMisc.explicitlySelected = true; 2083 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2084 break; 2085 } 2086 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2087 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2088 break; 2089 } 2090 } 2091 } 2092 2093 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2094 switch (msg.what) { 2095 default: 2096 return false; 2097 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2098 final NetworkAgentInfo nai; 2099 synchronized (mNetworkForNetId) { 2100 nai = mNetworkForNetId.get(msg.arg2); 2101 } 2102 if (nai != null) { 2103 final boolean valid = 2104 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2105 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2106 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2107 if (valid != nai.lastValidated) { 2108 final int oldScore = nai.getCurrentScore(); 2109 nai.lastValidated = valid; 2110 nai.everValidated |= valid; 2111 updateCapabilities(nai, nai.networkCapabilities); 2112 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2113 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2114 } 2115 updateInetCondition(nai); 2116 // Let the NetworkAgent know the state of its network 2117 Bundle redirectUrlBundle = new Bundle(); 2118 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2119 nai.asyncChannel.sendMessage( 2120 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2121 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2122 0, redirectUrlBundle); 2123 } 2124 break; 2125 } 2126 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 2127 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2128 if (isLiveNetworkAgent(nai, msg.what)) { 2129 handleLingerComplete(nai); 2130 } 2131 break; 2132 } 2133 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2134 final int netId = msg.arg2; 2135 final boolean visible = (msg.arg1 != 0); 2136 final NetworkAgentInfo nai; 2137 synchronized (mNetworkForNetId) { 2138 nai = mNetworkForNetId.get(netId); 2139 } 2140 // If captive portal status has changed, update capabilities. 2141 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2142 nai.lastCaptivePortalDetected = visible; 2143 nai.everCaptivePortalDetected |= visible; 2144 updateCapabilities(nai, nai.networkCapabilities); 2145 } 2146 if (!visible) { 2147 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2148 } else { 2149 if (nai == null) { 2150 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2151 break; 2152 } 2153 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2154 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2155 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2156 } 2157 break; 2158 } 2159 } 2160 return true; 2161 } 2162 2163 @Override 2164 public void handleMessage(Message msg) { 2165 if (!maybeHandleAsyncChannelMessage(msg) && !maybeHandleNetworkMonitorMessage(msg)) { 2166 maybeHandleNetworkAgentMessage(msg); 2167 } 2168 } 2169 } 2170 2171 private void linger(NetworkAgentInfo nai) { 2172 nai.lingering = true; 2173 NetworkEvent.logEvent(nai.network.netId, NetworkEvent.NETWORK_LINGER); 2174 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 2175 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 2176 } 2177 2178 // Cancel any lingering so the linger timeout doesn't teardown a network. 2179 // This should be called when a network begins satisfying a NetworkRequest. 2180 // Note: depending on what state the NetworkMonitor is in (e.g., 2181 // if it's awaiting captive portal login, or if validation failed), this 2182 // may trigger a re-evaluation of the network. 2183 private void unlinger(NetworkAgentInfo nai) { 2184 nai.networkLingered.clear(); 2185 if (!nai.lingering) return; 2186 nai.lingering = false; 2187 NetworkEvent.logEvent(nai.network.netId, NetworkEvent.NETWORK_UNLINGER); 2188 if (VDBG) log("Canceling linger of " + nai.name()); 2189 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2190 } 2191 2192 private void handleAsyncChannelHalfConnect(Message msg) { 2193 AsyncChannel ac = (AsyncChannel) msg.obj; 2194 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2195 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2196 if (VDBG) log("NetworkFactory connected"); 2197 // A network factory has connected. Send it all current NetworkRequests. 2198 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2199 if (!nri.isRequest()) continue; 2200 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2201 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2202 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2203 } 2204 } else { 2205 loge("Error connecting NetworkFactory"); 2206 mNetworkFactoryInfos.remove(msg.obj); 2207 } 2208 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2209 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2210 if (VDBG) log("NetworkAgent connected"); 2211 // A network agent has requested a connection. Establish the connection. 2212 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2213 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2214 } else { 2215 loge("Error connecting NetworkAgent"); 2216 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2217 if (nai != null) { 2218 final boolean wasDefault = isDefaultNetwork(nai); 2219 synchronized (mNetworkForNetId) { 2220 mNetworkForNetId.remove(nai.network.netId); 2221 mNetIdInUse.delete(nai.network.netId); 2222 } 2223 // Just in case. 2224 mLegacyTypeTracker.remove(nai, wasDefault); 2225 } 2226 } 2227 } 2228 } 2229 2230 private void handleAsyncChannelDisconnected(Message msg) { 2231 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2232 if (nai != null) { 2233 if (DBG) { 2234 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2235 } 2236 // A network agent has disconnected. 2237 // TODO - if we move the logic to the network agent (have them disconnect 2238 // because they lost all their requests or because their score isn't good) 2239 // then they would disconnect organically, report their new state and then 2240 // disconnect the channel. 2241 if (nai.networkInfo.isConnected()) { 2242 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2243 null, null); 2244 } 2245 final boolean wasDefault = isDefaultNetwork(nai); 2246 if (wasDefault) { 2247 mDefaultInetConditionPublished = 0; 2248 } 2249 notifyIfacesChangedForNetworkStats(); 2250 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2251 // by other networks that are already connected. Perhaps that can be done by 2252 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2253 // of rematchAllNetworksAndRequests 2254 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2255 mKeepaliveTracker.handleStopAllKeepalives(nai, 2256 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2257 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2258 mNetworkAgentInfos.remove(msg.replyTo); 2259 updateClat(null, nai.linkProperties, nai); 2260 synchronized (mNetworkForNetId) { 2261 // Remove the NetworkAgent, but don't mark the netId as 2262 // available until we've told netd to delete it below. 2263 mNetworkForNetId.remove(nai.network.netId); 2264 } 2265 // Remove all previously satisfied requests. 2266 for (int i = 0; i < nai.networkRequests.size(); i++) { 2267 NetworkRequest request = nai.networkRequests.valueAt(i); 2268 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2269 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2270 mNetworkForRequestId.remove(request.requestId); 2271 sendUpdatedScoreToFactories(request, 0); 2272 } 2273 } 2274 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2275 removeDataActivityTracking(nai); 2276 notifyLockdownVpn(nai); 2277 requestNetworkTransitionWakelock(nai.name()); 2278 } 2279 mLegacyTypeTracker.remove(nai, wasDefault); 2280 rematchAllNetworksAndRequests(null, 0); 2281 if (wasDefault && getDefaultNetwork() == null) { 2282 // Log that we lost the default network and there is no replacement. 2283 logDefaultNetworkEvent(null, nai); 2284 } 2285 if (nai.created) { 2286 // Tell netd to clean up the configuration for this network 2287 // (routing rules, DNS, etc). 2288 // This may be slow as it requires a lot of netd shelling out to ip and 2289 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2290 // after we've rematched networks with requests which should make a potential 2291 // fallback network the default or requested a new network from the 2292 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2293 // long time. 2294 try { 2295 mNetd.removeNetwork(nai.network.netId); 2296 } catch (Exception e) { 2297 loge("Exception removing network: " + e); 2298 } 2299 } 2300 synchronized (mNetworkForNetId) { 2301 mNetIdInUse.delete(nai.network.netId); 2302 } 2303 } else { 2304 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2305 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2306 } 2307 } 2308 2309 // If this method proves to be too slow then we can maintain a separate 2310 // pendingIntent => NetworkRequestInfo map. 2311 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2312 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2313 Intent intent = pendingIntent.getIntent(); 2314 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2315 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2316 if (existingPendingIntent != null && 2317 existingPendingIntent.getIntent().filterEquals(intent)) { 2318 return entry.getValue(); 2319 } 2320 } 2321 return null; 2322 } 2323 2324 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2325 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2326 2327 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2328 if (existingRequest != null) { // remove the existing request. 2329 if (DBG) log("Replacing " + existingRequest.request + " with " 2330 + nri.request + " because their intents matched."); 2331 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2332 } 2333 handleRegisterNetworkRequest(nri); 2334 } 2335 2336 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2337 mNetworkRequests.put(nri.request, nri); 2338 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2339 if (!nri.isRequest()) { 2340 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2341 if (nri.request.networkCapabilities.hasSignalStrength() && 2342 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2343 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2344 } 2345 } 2346 } 2347 rematchAllNetworksAndRequests(null, 0); 2348 if (nri.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2349 sendUpdatedScoreToFactories(nri.request, 0); 2350 } 2351 } 2352 2353 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2354 int callingUid) { 2355 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2356 if (nri != null) { 2357 handleReleaseNetworkRequest(nri.request, callingUid); 2358 } 2359 } 2360 2361 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2362 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2363 // would it have a chance of satisfying any NetworkRequests. 2364 private boolean unneeded(NetworkAgentInfo nai) { 2365 if (!nai.everConnected || nai.isVPN() || nai.lingering) return false; 2366 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2367 // If this Network is already the highest scoring Network for a request, or if 2368 // there is hope for it to become one if it validated, then it is needed. 2369 if (nri.isRequest() && nai.satisfies(nri.request) && 2370 (nai.networkRequests.get(nri.request.requestId) != null || 2371 // Note that this catches two important cases: 2372 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2373 // is currently satisfying the request. This is desirable when 2374 // cellular ends up validating but WiFi does not. 2375 // 2. Unvalidated WiFi will not be reaped when validated cellular 2376 // is currently satisfying the request. This is desirable when 2377 // WiFi ends up validating and out scoring cellular. 2378 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2379 nai.getCurrentScoreAsValidated())) { 2380 return false; 2381 } 2382 } 2383 return true; 2384 } 2385 2386 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2387 NetworkRequestInfo nri = mNetworkRequests.get(request); 2388 if (nri != null) { 2389 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2390 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2391 return; 2392 } 2393 if (VDBG || (DBG && nri.isRequest())) log("releasing NetworkRequest " + request); 2394 nri.unlinkDeathRecipient(); 2395 mNetworkRequests.remove(request); 2396 synchronized (mUidToNetworkRequestCount) { 2397 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2398 if (requests < 1) { 2399 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2400 nri.mUid); 2401 } else if (requests == 1) { 2402 mUidToNetworkRequestCount.removeAt( 2403 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2404 } else { 2405 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2406 } 2407 } 2408 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2409 if (nri.isRequest()) { 2410 // Find all networks that are satisfying this request and remove the request 2411 // from their request lists. 2412 // TODO - it's my understanding that for a request there is only a single 2413 // network satisfying it, so this loop is wasteful 2414 boolean wasKept = false; 2415 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2416 if (nai.networkRequests.get(nri.request.requestId) != null) { 2417 nai.networkRequests.remove(nri.request.requestId); 2418 if (VDBG) { 2419 log(" Removing from current network " + nai.name() + 2420 ", leaving " + nai.networkRequests.size() + 2421 " requests."); 2422 } 2423 if (unneeded(nai)) { 2424 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2425 teardownUnneededNetwork(nai); 2426 } else { 2427 // suspect there should only be one pass through here 2428 // but if any were kept do the check below 2429 wasKept |= true; 2430 } 2431 } 2432 } 2433 2434 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2435 if (nai != null) { 2436 mNetworkForRequestId.remove(nri.request.requestId); 2437 } 2438 // Maintain the illusion. When this request arrived, we might have pretended 2439 // that a network connected to serve it, even though the network was already 2440 // connected. Now that this request has gone away, we might have to pretend 2441 // that the network disconnected. LegacyTypeTracker will generate that 2442 // phantom disconnect for this type. 2443 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2444 boolean doRemove = true; 2445 if (wasKept) { 2446 // check if any of the remaining requests for this network are for the 2447 // same legacy type - if so, don't remove the nai 2448 for (int i = 0; i < nai.networkRequests.size(); i++) { 2449 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2450 if (otherRequest.legacyType == nri.request.legacyType && 2451 isRequest(otherRequest)) { 2452 if (DBG) log(" still have other legacy request - leaving"); 2453 doRemove = false; 2454 } 2455 } 2456 } 2457 2458 if (doRemove) { 2459 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2460 } 2461 } 2462 2463 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2464 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2465 nri.request); 2466 } 2467 } else { 2468 // listens don't have a singular affectedNetwork. Check all networks to see 2469 // if this listen request applies and remove it. 2470 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2471 nai.networkRequests.remove(nri.request.requestId); 2472 if (nri.request.networkCapabilities.hasSignalStrength() && 2473 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2474 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2475 } 2476 } 2477 } 2478 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2479 } 2480 } 2481 2482 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2483 enforceConnectivityInternalPermission(); 2484 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2485 accept ? 1 : 0, always ? 1: 0, network)); 2486 } 2487 2488 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2489 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2490 " accept=" + accept + " always=" + always); 2491 2492 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2493 if (nai == null) { 2494 // Nothing to do. 2495 return; 2496 } 2497 2498 if (nai.everValidated) { 2499 // The network validated while the dialog box was up. Take no action. 2500 return; 2501 } 2502 2503 if (!nai.networkMisc.explicitlySelected) { 2504 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2505 } 2506 2507 if (accept != nai.networkMisc.acceptUnvalidated) { 2508 int oldScore = nai.getCurrentScore(); 2509 nai.networkMisc.acceptUnvalidated = accept; 2510 rematchAllNetworksAndRequests(nai, oldScore); 2511 sendUpdatedScoreToFactories(nai); 2512 } 2513 2514 if (always) { 2515 nai.asyncChannel.sendMessage( 2516 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2517 } 2518 2519 if (!accept) { 2520 // Tell the NetworkAgent to not automatically reconnect to the network. 2521 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2522 // Teardown the nework. 2523 teardownUnneededNetwork(nai); 2524 } 2525 2526 } 2527 2528 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2529 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2530 mHandler.sendMessageDelayed( 2531 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2532 PROMPT_UNVALIDATED_DELAY_MS); 2533 } 2534 2535 private void handlePromptUnvalidated(Network network) { 2536 if (VDBG) log("handlePromptUnvalidated " + network); 2537 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2538 2539 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2540 // we haven't already been told to switch to it regardless of whether it validated or not. 2541 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2542 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2543 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2544 return; 2545 } 2546 2547 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2548 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2549 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2550 intent.setClassName("com.android.settings", 2551 "com.android.settings.wifi.WifiNoInternetDialog"); 2552 2553 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2554 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2555 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2556 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2557 } 2558 2559 private class InternalHandler extends Handler { 2560 public InternalHandler(Looper looper) { 2561 super(looper); 2562 } 2563 2564 @Override 2565 public void handleMessage(Message msg) { 2566 switch (msg.what) { 2567 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2568 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2569 String causedBy = null; 2570 synchronized (ConnectivityService.this) { 2571 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2572 mNetTransitionWakeLock.isHeld()) { 2573 mNetTransitionWakeLock.release(); 2574 causedBy = mNetTransitionWakeLockCausedBy; 2575 } else { 2576 break; 2577 } 2578 } 2579 if (VDBG) { 2580 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2581 log("Failed to find a new network - expiring NetTransition Wakelock"); 2582 } else { 2583 log("NetTransition Wakelock (" + 2584 (causedBy == null ? "unknown" : causedBy) + 2585 " cleared because we found a replacement network"); 2586 } 2587 } 2588 break; 2589 } 2590 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2591 handleDeprecatedGlobalHttpProxy(); 2592 break; 2593 } 2594 case EVENT_PROXY_HAS_CHANGED: { 2595 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2596 break; 2597 } 2598 case EVENT_REGISTER_NETWORK_FACTORY: { 2599 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2600 break; 2601 } 2602 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2603 handleUnregisterNetworkFactory((Messenger)msg.obj); 2604 break; 2605 } 2606 case EVENT_REGISTER_NETWORK_AGENT: { 2607 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2608 break; 2609 } 2610 case EVENT_REGISTER_NETWORK_REQUEST: 2611 case EVENT_REGISTER_NETWORK_LISTENER: { 2612 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2613 break; 2614 } 2615 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2616 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2617 handleRegisterNetworkRequestWithIntent(msg); 2618 break; 2619 } 2620 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2621 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2622 break; 2623 } 2624 case EVENT_RELEASE_NETWORK_REQUEST: { 2625 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2626 break; 2627 } 2628 case EVENT_SET_ACCEPT_UNVALIDATED: { 2629 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2630 break; 2631 } 2632 case EVENT_PROMPT_UNVALIDATED: { 2633 handlePromptUnvalidated((Network) msg.obj); 2634 break; 2635 } 2636 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2637 handleMobileDataAlwaysOn(); 2638 break; 2639 } 2640 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2641 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2642 mKeepaliveTracker.handleStartKeepalive(msg); 2643 break; 2644 } 2645 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2646 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2647 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2648 int slot = msg.arg1; 2649 int reason = msg.arg2; 2650 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2651 break; 2652 } 2653 case EVENT_SYSTEM_READY: { 2654 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2655 nai.networkMonitor.systemReady = true; 2656 } 2657 break; 2658 } 2659 } 2660 } 2661 } 2662 2663 // javadoc from interface 2664 public int tether(String iface) { 2665 ConnectivityManager.enforceTetherChangePermission(mContext); 2666 if (isTetheringSupported()) { 2667 final int status = mTethering.tether(iface); 2668 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2669 try { 2670 mPolicyManager.onTetheringChanged(iface, true); 2671 } catch (RemoteException e) { 2672 } 2673 } 2674 return status; 2675 } else { 2676 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2677 } 2678 } 2679 2680 // javadoc from interface 2681 public int untether(String iface) { 2682 ConnectivityManager.enforceTetherChangePermission(mContext); 2683 2684 if (isTetheringSupported()) { 2685 final int status = mTethering.untether(iface); 2686 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2687 try { 2688 mPolicyManager.onTetheringChanged(iface, false); 2689 } catch (RemoteException e) { 2690 } 2691 } 2692 return status; 2693 } else { 2694 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2695 } 2696 } 2697 2698 // javadoc from interface 2699 public int getLastTetherError(String iface) { 2700 enforceTetherAccessPermission(); 2701 2702 if (isTetheringSupported()) { 2703 return mTethering.getLastTetherError(iface); 2704 } else { 2705 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2706 } 2707 } 2708 2709 // TODO - proper iface API for selection by property, inspection, etc 2710 public String[] getTetherableUsbRegexs() { 2711 enforceTetherAccessPermission(); 2712 if (isTetheringSupported()) { 2713 return mTethering.getTetherableUsbRegexs(); 2714 } else { 2715 return new String[0]; 2716 } 2717 } 2718 2719 public String[] getTetherableWifiRegexs() { 2720 enforceTetherAccessPermission(); 2721 if (isTetheringSupported()) { 2722 return mTethering.getTetherableWifiRegexs(); 2723 } else { 2724 return new String[0]; 2725 } 2726 } 2727 2728 public String[] getTetherableBluetoothRegexs() { 2729 enforceTetherAccessPermission(); 2730 if (isTetheringSupported()) { 2731 return mTethering.getTetherableBluetoothRegexs(); 2732 } else { 2733 return new String[0]; 2734 } 2735 } 2736 2737 public int setUsbTethering(boolean enable) { 2738 ConnectivityManager.enforceTetherChangePermission(mContext); 2739 if (isTetheringSupported()) { 2740 return mTethering.setUsbTethering(enable); 2741 } else { 2742 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2743 } 2744 } 2745 2746 // TODO - move iface listing, queries, etc to new module 2747 // javadoc from interface 2748 public String[] getTetherableIfaces() { 2749 enforceTetherAccessPermission(); 2750 return mTethering.getTetherableIfaces(); 2751 } 2752 2753 public String[] getTetheredIfaces() { 2754 enforceTetherAccessPermission(); 2755 return mTethering.getTetheredIfaces(); 2756 } 2757 2758 public String[] getTetheringErroredIfaces() { 2759 enforceTetherAccessPermission(); 2760 return mTethering.getErroredIfaces(); 2761 } 2762 2763 public String[] getTetheredDhcpRanges() { 2764 enforceConnectivityInternalPermission(); 2765 return mTethering.getTetheredDhcpRanges(); 2766 } 2767 2768 // if ro.tether.denied = true we default to no tethering 2769 // gservices could set the secure setting to 1 though to enable it on a build where it 2770 // had previously been turned off. 2771 @Override 2772 public boolean isTetheringSupported() { 2773 enforceTetherAccessPermission(); 2774 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2775 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2776 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2777 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2778 return tetherEnabledInSettings && mUserManager.isAdminUser() && 2779 ((mTethering.getTetherableUsbRegexs().length != 0 || 2780 mTethering.getTetherableWifiRegexs().length != 0 || 2781 mTethering.getTetherableBluetoothRegexs().length != 0) && 2782 mTethering.getUpstreamIfaceTypes().length != 0); 2783 } 2784 2785 @Override 2786 public void startTethering(int type, ResultReceiver receiver, 2787 boolean showProvisioningUi) { 2788 ConnectivityManager.enforceTetherChangePermission(mContext); 2789 if (!isTetheringSupported()) { 2790 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 2791 return; 2792 } 2793 mTethering.startTethering(type, receiver, showProvisioningUi); 2794 } 2795 2796 @Override 2797 public void stopTethering(int type) { 2798 ConnectivityManager.enforceTetherChangePermission(mContext); 2799 mTethering.stopTethering(type); 2800 } 2801 2802 // Called when we lose the default network and have no replacement yet. 2803 // This will automatically be cleared after X seconds or a new default network 2804 // becomes CONNECTED, whichever happens first. The timer is started by the 2805 // first caller and not restarted by subsequent callers. 2806 private void requestNetworkTransitionWakelock(String forWhom) { 2807 int serialNum = 0; 2808 synchronized (this) { 2809 if (mNetTransitionWakeLock.isHeld()) return; 2810 serialNum = ++mNetTransitionWakeLockSerialNumber; 2811 mNetTransitionWakeLock.acquire(); 2812 mNetTransitionWakeLockCausedBy = forWhom; 2813 } 2814 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2815 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2816 mNetTransitionWakeLockTimeout); 2817 return; 2818 } 2819 2820 // 100 percent is full good, 0 is full bad. 2821 public void reportInetCondition(int networkType, int percentage) { 2822 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2823 if (nai == null) return; 2824 reportNetworkConnectivity(nai.network, percentage > 50); 2825 } 2826 2827 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2828 enforceAccessPermission(); 2829 enforceInternetPermission(); 2830 2831 NetworkAgentInfo nai; 2832 if (network == null) { 2833 nai = getDefaultNetwork(); 2834 } else { 2835 nai = getNetworkAgentInfoForNetwork(network); 2836 } 2837 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2838 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2839 return; 2840 } 2841 // Revalidate if the app report does not match our current validated state. 2842 if (hasConnectivity == nai.lastValidated) return; 2843 final int uid = Binder.getCallingUid(); 2844 if (DBG) { 2845 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2846 ") by " + uid); 2847 } 2848 synchronized (nai) { 2849 // Validating a network that has not yet connected could result in a call to 2850 // rematchNetworkAndRequests() which is not meant to work on such networks. 2851 if (!nai.everConnected) return; 2852 2853 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 2854 2855 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2856 } 2857 } 2858 2859 private ProxyInfo getDefaultProxy() { 2860 // this information is already available as a world read/writable jvm property 2861 // so this API change wouldn't have a benifit. It also breaks the passing 2862 // of proxy info to all the JVMs. 2863 // enforceAccessPermission(); 2864 synchronized (mProxyLock) { 2865 ProxyInfo ret = mGlobalProxy; 2866 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2867 return ret; 2868 } 2869 } 2870 2871 public ProxyInfo getProxyForNetwork(Network network) { 2872 if (network == null) return getDefaultProxy(); 2873 final ProxyInfo globalProxy = getGlobalProxy(); 2874 if (globalProxy != null) return globalProxy; 2875 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 2876 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 2877 // caller may not have. 2878 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2879 if (nai == null) return null; 2880 synchronized (nai) { 2881 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 2882 if (proxyInfo == null) return null; 2883 return new ProxyInfo(proxyInfo); 2884 } 2885 } 2886 2887 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2888 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2889 // proxy is null then there is no proxy in place). 2890 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2891 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2892 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2893 proxy = null; 2894 } 2895 return proxy; 2896 } 2897 2898 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2899 // better for determining if a new proxy broadcast is necessary: 2900 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2901 // avoid unnecessary broadcasts. 2902 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2903 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2904 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2905 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2906 // all set. 2907 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2908 a = canonicalizeProxyInfo(a); 2909 b = canonicalizeProxyInfo(b); 2910 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2911 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2912 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2913 } 2914 2915 public void setGlobalProxy(ProxyInfo proxyProperties) { 2916 enforceConnectivityInternalPermission(); 2917 2918 synchronized (mProxyLock) { 2919 if (proxyProperties == mGlobalProxy) return; 2920 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2921 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2922 2923 String host = ""; 2924 int port = 0; 2925 String exclList = ""; 2926 String pacFileUrl = ""; 2927 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2928 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2929 if (!proxyProperties.isValid()) { 2930 if (DBG) 2931 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2932 return; 2933 } 2934 mGlobalProxy = new ProxyInfo(proxyProperties); 2935 host = mGlobalProxy.getHost(); 2936 port = mGlobalProxy.getPort(); 2937 exclList = mGlobalProxy.getExclusionListAsString(); 2938 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2939 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2940 } 2941 } else { 2942 mGlobalProxy = null; 2943 } 2944 ContentResolver res = mContext.getContentResolver(); 2945 final long token = Binder.clearCallingIdentity(); 2946 try { 2947 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2948 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2949 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2950 exclList); 2951 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2952 } finally { 2953 Binder.restoreCallingIdentity(token); 2954 } 2955 2956 if (mGlobalProxy == null) { 2957 proxyProperties = mDefaultProxy; 2958 } 2959 sendProxyBroadcast(proxyProperties); 2960 } 2961 } 2962 2963 private void loadGlobalProxy() { 2964 ContentResolver res = mContext.getContentResolver(); 2965 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2966 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2967 String exclList = Settings.Global.getString(res, 2968 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2969 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2970 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2971 ProxyInfo proxyProperties; 2972 if (!TextUtils.isEmpty(pacFileUrl)) { 2973 proxyProperties = new ProxyInfo(pacFileUrl); 2974 } else { 2975 proxyProperties = new ProxyInfo(host, port, exclList); 2976 } 2977 if (!proxyProperties.isValid()) { 2978 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2979 return; 2980 } 2981 2982 synchronized (mProxyLock) { 2983 mGlobalProxy = proxyProperties; 2984 } 2985 } 2986 } 2987 2988 public ProxyInfo getGlobalProxy() { 2989 // this information is already available as a world read/writable jvm property 2990 // so this API change wouldn't have a benifit. It also breaks the passing 2991 // of proxy info to all the JVMs. 2992 // enforceAccessPermission(); 2993 synchronized (mProxyLock) { 2994 return mGlobalProxy; 2995 } 2996 } 2997 2998 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2999 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 3000 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 3001 proxy = null; 3002 } 3003 synchronized (mProxyLock) { 3004 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 3005 if (mDefaultProxy == proxy) return; // catches repeated nulls 3006 if (proxy != null && !proxy.isValid()) { 3007 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 3008 return; 3009 } 3010 3011 // This call could be coming from the PacManager, containing the port of the local 3012 // proxy. If this new proxy matches the global proxy then copy this proxy to the 3013 // global (to get the correct local port), and send a broadcast. 3014 // TODO: Switch PacManager to have its own message to send back rather than 3015 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 3016 if ((mGlobalProxy != null) && (proxy != null) 3017 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 3018 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 3019 mGlobalProxy = proxy; 3020 sendProxyBroadcast(mGlobalProxy); 3021 return; 3022 } 3023 mDefaultProxy = proxy; 3024 3025 if (mGlobalProxy != null) return; 3026 if (!mDefaultProxyDisabled) { 3027 sendProxyBroadcast(proxy); 3028 } 3029 } 3030 } 3031 3032 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 3033 // This method gets called when any network changes proxy, but the broadcast only ever contains 3034 // the default proxy (even if it hasn't changed). 3035 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 3036 // world where an app might be bound to a non-default network. 3037 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3038 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 3039 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 3040 3041 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 3042 sendProxyBroadcast(getDefaultProxy()); 3043 } 3044 } 3045 3046 private void handleDeprecatedGlobalHttpProxy() { 3047 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3048 Settings.Global.HTTP_PROXY); 3049 if (!TextUtils.isEmpty(proxy)) { 3050 String data[] = proxy.split(":"); 3051 if (data.length == 0) { 3052 return; 3053 } 3054 3055 String proxyHost = data[0]; 3056 int proxyPort = 8080; 3057 if (data.length > 1) { 3058 try { 3059 proxyPort = Integer.parseInt(data[1]); 3060 } catch (NumberFormatException e) { 3061 return; 3062 } 3063 } 3064 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3065 setGlobalProxy(p); 3066 } 3067 } 3068 3069 private void sendProxyBroadcast(ProxyInfo proxy) { 3070 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3071 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3072 if (DBG) log("sending Proxy Broadcast for " + proxy); 3073 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3074 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3075 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3076 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3077 final long ident = Binder.clearCallingIdentity(); 3078 try { 3079 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3080 } finally { 3081 Binder.restoreCallingIdentity(ident); 3082 } 3083 } 3084 3085 private static class SettingsObserver extends ContentObserver { 3086 final private HashMap<Uri, Integer> mUriEventMap; 3087 final private Context mContext; 3088 final private Handler mHandler; 3089 3090 SettingsObserver(Context context, Handler handler) { 3091 super(null); 3092 mUriEventMap = new HashMap<Uri, Integer>(); 3093 mContext = context; 3094 mHandler = handler; 3095 } 3096 3097 void observe(Uri uri, int what) { 3098 mUriEventMap.put(uri, what); 3099 final ContentResolver resolver = mContext.getContentResolver(); 3100 resolver.registerContentObserver(uri, false, this); 3101 } 3102 3103 @Override 3104 public void onChange(boolean selfChange) { 3105 Slog.wtf(TAG, "Should never be reached."); 3106 } 3107 3108 @Override 3109 public void onChange(boolean selfChange, Uri uri) { 3110 final Integer what = mUriEventMap.get(uri); 3111 if (what != null) { 3112 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3113 } else { 3114 loge("No matching event to send for URI=" + uri); 3115 } 3116 } 3117 } 3118 3119 private static void log(String s) { 3120 Slog.d(TAG, s); 3121 } 3122 3123 private static void loge(String s) { 3124 Slog.e(TAG, s); 3125 } 3126 3127 private static <T> T checkNotNull(T value, String message) { 3128 if (value == null) { 3129 throw new NullPointerException(message); 3130 } 3131 return value; 3132 } 3133 3134 /** 3135 * Prepare for a VPN application. 3136 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3137 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3138 * 3139 * @param oldPackage Package name of the application which currently controls VPN, which will 3140 * be replaced. If there is no such application, this should should either be 3141 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3142 * @param newPackage Package name of the application which should gain control of VPN, or 3143 * {@code null} to disable. 3144 * @param userId User for whom to prepare the new VPN. 3145 * 3146 * @hide 3147 */ 3148 @Override 3149 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3150 int userId) { 3151 enforceCrossUserPermission(userId); 3152 throwIfLockdownEnabled(); 3153 3154 synchronized(mVpns) { 3155 Vpn vpn = mVpns.get(userId); 3156 if (vpn != null) { 3157 return vpn.prepare(oldPackage, newPackage); 3158 } else { 3159 return false; 3160 } 3161 } 3162 } 3163 3164 /** 3165 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3166 * This method is used by system-privileged apps. 3167 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3168 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3169 * 3170 * @param packageName The package for which authorization state should change. 3171 * @param userId User for whom {@code packageName} is installed. 3172 * @param authorized {@code true} if this app should be able to start a VPN connection without 3173 * explicit user approval, {@code false} if not. 3174 * 3175 * @hide 3176 */ 3177 @Override 3178 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3179 enforceCrossUserPermission(userId); 3180 3181 synchronized(mVpns) { 3182 Vpn vpn = mVpns.get(userId); 3183 if (vpn != null) { 3184 vpn.setPackageAuthorization(packageName, authorized); 3185 } 3186 } 3187 } 3188 3189 /** 3190 * Configure a TUN interface and return its file descriptor. Parameters 3191 * are encoded and opaque to this class. This method is used by VpnBuilder 3192 * and not available in ConnectivityManager. Permissions are checked in 3193 * Vpn class. 3194 * @hide 3195 */ 3196 @Override 3197 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3198 throwIfLockdownEnabled(); 3199 int user = UserHandle.getUserId(Binder.getCallingUid()); 3200 synchronized(mVpns) { 3201 return mVpns.get(user).establish(config); 3202 } 3203 } 3204 3205 /** 3206 * Start legacy VPN, controlling native daemons as needed. Creates a 3207 * secondary thread to perform connection work, returning quickly. 3208 */ 3209 @Override 3210 public void startLegacyVpn(VpnProfile profile) { 3211 throwIfLockdownEnabled(); 3212 final LinkProperties egress = getActiveLinkProperties(); 3213 if (egress == null) { 3214 throw new IllegalStateException("Missing active network connection"); 3215 } 3216 int user = UserHandle.getUserId(Binder.getCallingUid()); 3217 synchronized(mVpns) { 3218 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3219 } 3220 } 3221 3222 /** 3223 * Return the information of the ongoing legacy VPN. This method is used 3224 * by VpnSettings and not available in ConnectivityManager. Permissions 3225 * are checked in Vpn class. 3226 */ 3227 @Override 3228 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3229 enforceCrossUserPermission(userId); 3230 if (mLockdownEnabled) { 3231 return null; 3232 } 3233 3234 synchronized(mVpns) { 3235 return mVpns.get(userId).getLegacyVpnInfo(); 3236 } 3237 } 3238 3239 /** 3240 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3241 * and not available in ConnectivityManager. 3242 */ 3243 @Override 3244 public VpnInfo[] getAllVpnInfo() { 3245 enforceConnectivityInternalPermission(); 3246 if (mLockdownEnabled) { 3247 return new VpnInfo[0]; 3248 } 3249 3250 synchronized(mVpns) { 3251 List<VpnInfo> infoList = new ArrayList<>(); 3252 for (int i = 0; i < mVpns.size(); i++) { 3253 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3254 if (info != null) { 3255 infoList.add(info); 3256 } 3257 } 3258 return infoList.toArray(new VpnInfo[infoList.size()]); 3259 } 3260 } 3261 3262 /** 3263 * @return VPN information for accounting, or null if we can't retrieve all required 3264 * information, e.g primary underlying iface. 3265 */ 3266 @Nullable 3267 private VpnInfo createVpnInfo(Vpn vpn) { 3268 VpnInfo info = vpn.getVpnInfo(); 3269 if (info == null) { 3270 return null; 3271 } 3272 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3273 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3274 // the underlyingNetworks list. 3275 if (underlyingNetworks == null) { 3276 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3277 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3278 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3279 } 3280 } else if (underlyingNetworks.length > 0) { 3281 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3282 if (linkProperties != null) { 3283 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3284 } 3285 } 3286 return info.primaryUnderlyingIface == null ? null : info; 3287 } 3288 3289 /** 3290 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3291 * VpnDialogs and not available in ConnectivityManager. 3292 * Permissions are checked in Vpn class. 3293 * @hide 3294 */ 3295 @Override 3296 public VpnConfig getVpnConfig(int userId) { 3297 enforceCrossUserPermission(userId); 3298 synchronized(mVpns) { 3299 Vpn vpn = mVpns.get(userId); 3300 if (vpn != null) { 3301 return vpn.getVpnConfig(); 3302 } else { 3303 return null; 3304 } 3305 } 3306 } 3307 3308 @Override 3309 public boolean updateLockdownVpn() { 3310 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3311 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3312 return false; 3313 } 3314 3315 // Tear down existing lockdown if profile was removed 3316 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3317 if (mLockdownEnabled) { 3318 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3319 final VpnProfile profile = VpnProfile.decode( 3320 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3321 if (profile == null) { 3322 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3323 setLockdownTracker(null); 3324 return true; 3325 } 3326 int user = UserHandle.getUserId(Binder.getCallingUid()); 3327 synchronized(mVpns) { 3328 Vpn vpn = mVpns.get(user); 3329 if (vpn == null) { 3330 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3331 return false; 3332 } 3333 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3334 } 3335 } else { 3336 setLockdownTracker(null); 3337 } 3338 3339 return true; 3340 } 3341 3342 /** 3343 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3344 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3345 */ 3346 private void setLockdownTracker(LockdownVpnTracker tracker) { 3347 // Shutdown any existing tracker 3348 final LockdownVpnTracker existing = mLockdownTracker; 3349 mLockdownTracker = null; 3350 if (existing != null) { 3351 existing.shutdown(); 3352 } 3353 3354 try { 3355 if (tracker != null) { 3356 mNetd.setFirewallEnabled(true); 3357 mNetd.setFirewallInterfaceRule("lo", true); 3358 mLockdownTracker = tracker; 3359 mLockdownTracker.init(); 3360 } else { 3361 mNetd.setFirewallEnabled(false); 3362 } 3363 } catch (RemoteException e) { 3364 // ignored; NMS lives inside system_server 3365 } 3366 } 3367 3368 private void throwIfLockdownEnabled() { 3369 if (mLockdownEnabled) { 3370 throw new IllegalStateException("Unavailable in lockdown mode"); 3371 } 3372 } 3373 3374 /** 3375 * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform 3376 * some setup and then call {@code establish()} to connect. 3377 * 3378 * @return {@code true} if the service was started, the service was already connected, or there 3379 * was no always-on VPN to start. {@code false} otherwise. 3380 */ 3381 private boolean startAlwaysOnVpn(int userId) { 3382 final String alwaysOnPackage; 3383 synchronized (mVpns) { 3384 Vpn vpn = mVpns.get(userId); 3385 if (vpn == null) { 3386 // Shouldn't happen as all codepaths that point here should have checked the Vpn 3387 // exists already. 3388 Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); 3389 return false; 3390 } 3391 alwaysOnPackage = vpn.getAlwaysOnPackage(); 3392 // Skip if there is no service to start. 3393 if (alwaysOnPackage == null) { 3394 return true; 3395 } 3396 // Skip if the service is already established. This isn't bulletproof: it's not bound 3397 // until after establish(), so if it's mid-setup onStartCommand will be sent twice, 3398 // which may restart the connection. 3399 if (vpn.getNetworkInfo().isConnected()) { 3400 return true; 3401 } 3402 } 3403 3404 // Start the VPN service declared in the app's manifest. 3405 Intent serviceIntent = new Intent(VpnConfig.SERVICE_INTERFACE); 3406 serviceIntent.setPackage(alwaysOnPackage); 3407 try { 3408 return mContext.startServiceAsUser(serviceIntent, UserHandle.of(userId)) != null; 3409 } catch (RuntimeException e) { 3410 Slog.w(TAG, "VpnService " + serviceIntent + " failed to start", e); 3411 return false; 3412 } 3413 } 3414 3415 @Override 3416 public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { 3417 enforceConnectivityInternalPermission(); 3418 enforceCrossUserPermission(userId); 3419 3420 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3421 if (LockdownVpnTracker.isEnabled()) { 3422 return false; 3423 } 3424 3425 synchronized (mVpns) { 3426 Vpn vpn = mVpns.get(userId); 3427 if (vpn == null) { 3428 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3429 return false; 3430 } 3431 // If the current VPN package is the same as the new one, this is a no-op 3432 if (TextUtils.equals(packageName, vpn.getAlwaysOnPackage())) { 3433 return true; 3434 } 3435 if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { 3436 return false; 3437 } 3438 if (!startAlwaysOnVpn(userId)) { 3439 vpn.setAlwaysOnPackage(null, false); 3440 return false; 3441 } 3442 3443 // Save the configuration 3444 final long token = Binder.clearCallingIdentity(); 3445 try { 3446 final ContentResolver cr = mContext.getContentResolver(); 3447 Settings.Secure.putStringForUser(cr, Settings.Secure.ALWAYS_ON_VPN_APP, 3448 packageName, userId); 3449 Settings.Secure.putIntForUser(cr, Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, 3450 (lockdown ? 1 : 0), userId); 3451 } finally { 3452 Binder.restoreCallingIdentity(token); 3453 } 3454 } 3455 return true; 3456 } 3457 3458 @Override 3459 public String getAlwaysOnVpnPackage(int userId) { 3460 enforceConnectivityInternalPermission(); 3461 enforceCrossUserPermission(userId); 3462 3463 synchronized (mVpns) { 3464 Vpn vpn = mVpns.get(userId); 3465 if (vpn == null) { 3466 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3467 return null; 3468 } 3469 return vpn.getAlwaysOnPackage(); 3470 } 3471 } 3472 3473 @Override 3474 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3475 // TODO: Remove? Any reason to trigger a provisioning check? 3476 return -1; 3477 } 3478 3479 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3480 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3481 3482 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3483 Intent intent = new Intent(action); 3484 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3485 // Concatenate the range of types onto the range of NetIDs. 3486 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3487 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3488 networkType, null, pendingIntent, false); 3489 } 3490 3491 /** 3492 * Show or hide network provisioning notifications. 3493 * 3494 * We use notifications for two purposes: to notify that a network requires sign in 3495 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3496 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3497 * particular network we can display the notification type that was most recently requested. 3498 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3499 * might first display NO_INTERNET, and then when the captive portal check completes, display 3500 * SIGN_IN. 3501 * 3502 * @param id an identifier that uniquely identifies this notification. This must match 3503 * between show and hide calls. We use the NetID value but for legacy callers 3504 * we concatenate the range of types with the range of NetIDs. 3505 */ 3506 private void setProvNotificationVisibleIntent(boolean visible, int id, 3507 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3508 boolean highPriority) { 3509 if (VDBG || (DBG && visible)) { 3510 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3511 + " networkType=" + getNetworkTypeName(networkType) 3512 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3513 } 3514 3515 Resources r = Resources.getSystem(); 3516 NotificationManager notificationManager = (NotificationManager) mContext 3517 .getSystemService(Context.NOTIFICATION_SERVICE); 3518 3519 if (visible) { 3520 CharSequence title; 3521 CharSequence details; 3522 int icon; 3523 if (notifyType == NotificationType.NO_INTERNET && 3524 networkType == ConnectivityManager.TYPE_WIFI) { 3525 title = r.getString(R.string.wifi_no_internet, 0); 3526 details = r.getString(R.string.wifi_no_internet_detailed); 3527 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3528 } else if (notifyType == NotificationType.SIGN_IN) { 3529 switch (networkType) { 3530 case ConnectivityManager.TYPE_WIFI: 3531 title = r.getString(R.string.wifi_available_sign_in, 0); 3532 details = r.getString(R.string.network_available_sign_in_detailed, 3533 extraInfo); 3534 icon = R.drawable.stat_notify_wifi_in_range; 3535 break; 3536 case ConnectivityManager.TYPE_MOBILE: 3537 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3538 title = r.getString(R.string.network_available_sign_in, 0); 3539 // TODO: Change this to pull from NetworkInfo once a printable 3540 // name has been added to it 3541 details = mTelephonyManager.getNetworkOperatorName(); 3542 icon = R.drawable.stat_notify_rssi_in_range; 3543 break; 3544 default: 3545 title = r.getString(R.string.network_available_sign_in, 0); 3546 details = r.getString(R.string.network_available_sign_in_detailed, 3547 extraInfo); 3548 icon = R.drawable.stat_notify_rssi_in_range; 3549 break; 3550 } 3551 } else { 3552 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3553 + getNetworkTypeName(networkType)); 3554 return; 3555 } 3556 3557 Notification notification = new Notification.Builder(mContext) 3558 .setWhen(0) 3559 .setSmallIcon(icon) 3560 .setAutoCancel(true) 3561 .setTicker(title) 3562 .setColor(mContext.getColor( 3563 com.android.internal.R.color.system_notification_accent_color)) 3564 .setContentTitle(title) 3565 .setContentText(details) 3566 .setContentIntent(intent) 3567 .setLocalOnly(true) 3568 .setPriority(highPriority ? 3569 Notification.PRIORITY_HIGH : 3570 Notification.PRIORITY_DEFAULT) 3571 .setDefaults(highPriority ? Notification.DEFAULT_ALL : 0) 3572 .setOnlyAlertOnce(true) 3573 .build(); 3574 3575 try { 3576 notificationManager.notify(NOTIFICATION_ID, id, notification); 3577 } catch (NullPointerException npe) { 3578 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3579 npe.printStackTrace(); 3580 } 3581 } else { 3582 try { 3583 notificationManager.cancel(NOTIFICATION_ID, id); 3584 } catch (NullPointerException npe) { 3585 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3586 npe.printStackTrace(); 3587 } 3588 } 3589 } 3590 3591 /** Location to an updatable file listing carrier provisioning urls. 3592 * An example: 3593 * 3594 * <?xml version="1.0" encoding="utf-8"?> 3595 * <provisioningUrls> 3596 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3597 * </provisioningUrls> 3598 */ 3599 private static final String PROVISIONING_URL_PATH = 3600 "/data/misc/radio/provisioning_urls.xml"; 3601 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3602 3603 /** XML tag for root element. */ 3604 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3605 /** XML tag for individual url */ 3606 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3607 /** XML attribute for mcc */ 3608 private static final String ATTR_MCC = "mcc"; 3609 /** XML attribute for mnc */ 3610 private static final String ATTR_MNC = "mnc"; 3611 3612 private String getProvisioningUrlBaseFromFile() { 3613 FileReader fileReader = null; 3614 XmlPullParser parser = null; 3615 Configuration config = mContext.getResources().getConfiguration(); 3616 3617 try { 3618 fileReader = new FileReader(mProvisioningUrlFile); 3619 parser = Xml.newPullParser(); 3620 parser.setInput(fileReader); 3621 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3622 3623 while (true) { 3624 XmlUtils.nextElement(parser); 3625 3626 String element = parser.getName(); 3627 if (element == null) break; 3628 3629 if (element.equals(TAG_PROVISIONING_URL)) { 3630 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3631 try { 3632 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3633 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3634 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3635 parser.next(); 3636 if (parser.getEventType() == XmlPullParser.TEXT) { 3637 return parser.getText(); 3638 } 3639 } 3640 } 3641 } catch (NumberFormatException e) { 3642 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3643 } 3644 } 3645 } 3646 return null; 3647 } catch (FileNotFoundException e) { 3648 loge("Carrier Provisioning Urls file not found"); 3649 } catch (XmlPullParserException e) { 3650 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3651 } catch (IOException e) { 3652 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3653 } finally { 3654 if (fileReader != null) { 3655 try { 3656 fileReader.close(); 3657 } catch (IOException e) {} 3658 } 3659 } 3660 return null; 3661 } 3662 3663 @Override 3664 public String getMobileProvisioningUrl() { 3665 enforceConnectivityInternalPermission(); 3666 String url = getProvisioningUrlBaseFromFile(); 3667 if (TextUtils.isEmpty(url)) { 3668 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3669 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3670 } else { 3671 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3672 } 3673 // populate the iccid, imei and phone number in the provisioning url. 3674 if (!TextUtils.isEmpty(url)) { 3675 String phoneNumber = mTelephonyManager.getLine1Number(); 3676 if (TextUtils.isEmpty(phoneNumber)) { 3677 phoneNumber = "0000000000"; 3678 } 3679 url = String.format(url, 3680 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3681 mTelephonyManager.getDeviceId() /* IMEI */, 3682 phoneNumber /* Phone numer */); 3683 } 3684 3685 return url; 3686 } 3687 3688 @Override 3689 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3690 String action) { 3691 enforceConnectivityInternalPermission(); 3692 final long ident = Binder.clearCallingIdentity(); 3693 try { 3694 setProvNotificationVisible(visible, networkType, action); 3695 } finally { 3696 Binder.restoreCallingIdentity(ident); 3697 } 3698 } 3699 3700 @Override 3701 public void setAirplaneMode(boolean enable) { 3702 enforceConnectivityInternalPermission(); 3703 final long ident = Binder.clearCallingIdentity(); 3704 try { 3705 final ContentResolver cr = mContext.getContentResolver(); 3706 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3707 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3708 intent.putExtra("state", enable); 3709 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3710 } finally { 3711 Binder.restoreCallingIdentity(ident); 3712 } 3713 } 3714 3715 private void onUserStart(int userId) { 3716 synchronized(mVpns) { 3717 Vpn userVpn = mVpns.get(userId); 3718 if (userVpn != null) { 3719 loge("Starting user already has a VPN"); 3720 return; 3721 } 3722 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3723 mVpns.put(userId, userVpn); 3724 3725 final ContentResolver cr = mContext.getContentResolver(); 3726 String alwaysOnPackage = Settings.Secure.getStringForUser(cr, 3727 Settings.Secure.ALWAYS_ON_VPN_APP, userId); 3728 final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, 3729 Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; 3730 if (alwaysOnPackage != null) { 3731 userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); 3732 } 3733 } 3734 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3735 updateLockdownVpn(); 3736 } 3737 } 3738 3739 private void onUserStop(int userId) { 3740 synchronized(mVpns) { 3741 Vpn userVpn = mVpns.get(userId); 3742 if (userVpn == null) { 3743 loge("Stopped user has no VPN"); 3744 return; 3745 } 3746 userVpn.onUserStopped(); 3747 mVpns.delete(userId); 3748 } 3749 } 3750 3751 private void onUserAdded(int userId) { 3752 synchronized(mVpns) { 3753 final int vpnsSize = mVpns.size(); 3754 for (int i = 0; i < vpnsSize; i++) { 3755 Vpn vpn = mVpns.valueAt(i); 3756 vpn.onUserAdded(userId); 3757 } 3758 } 3759 } 3760 3761 private void onUserRemoved(int userId) { 3762 synchronized(mVpns) { 3763 final int vpnsSize = mVpns.size(); 3764 for (int i = 0; i < vpnsSize; i++) { 3765 Vpn vpn = mVpns.valueAt(i); 3766 vpn.onUserRemoved(userId); 3767 } 3768 } 3769 } 3770 3771 private void onUserUnlocked(int userId) { 3772 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3773 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3774 updateLockdownVpn(); 3775 } else { 3776 startAlwaysOnVpn(userId); 3777 } 3778 } 3779 3780 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3781 @Override 3782 public void onReceive(Context context, Intent intent) { 3783 final String action = intent.getAction(); 3784 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3785 if (userId == UserHandle.USER_NULL) return; 3786 3787 if (Intent.ACTION_USER_STARTED.equals(action)) { 3788 onUserStart(userId); 3789 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3790 onUserStop(userId); 3791 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3792 onUserAdded(userId); 3793 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3794 onUserRemoved(userId); 3795 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3796 onUserUnlocked(userId); 3797 } 3798 } 3799 }; 3800 3801 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3802 new HashMap<Messenger, NetworkFactoryInfo>(); 3803 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3804 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3805 3806 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3807 // Map from UID to number of NetworkRequests that UID has filed. 3808 @GuardedBy("mUidToNetworkRequestCount") 3809 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3810 3811 private static class NetworkFactoryInfo { 3812 public final String name; 3813 public final Messenger messenger; 3814 public final AsyncChannel asyncChannel; 3815 3816 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3817 this.name = name; 3818 this.messenger = messenger; 3819 this.asyncChannel = asyncChannel; 3820 } 3821 } 3822 3823 /** 3824 * A NetworkRequest as registered by an application can be one of three 3825 * types: 3826 * 3827 * - "listen", for which the framework will issue callbacks about any 3828 * and all networks that match the specified NetworkCapabilities, 3829 * 3830 * - "request", capable of causing a specific network to be created 3831 * first (e.g. a telephony DUN request), the framework will issue 3832 * callbacks about the single, highest scoring current network 3833 * (if any) that matches the specified NetworkCapabilities, or 3834 * 3835 * - "track the default network", a hybrid of the two designed such 3836 * that the framework will issue callbacks for the single, highest 3837 * scoring current network (if any) that matches the capabilities of 3838 * the default Internet request (mDefaultRequest), but which cannot 3839 * cause the framework to either create or retain the existence of 3840 * any specific network. 3841 * 3842 */ 3843 private static enum NetworkRequestType { 3844 LISTEN, 3845 TRACK_DEFAULT, 3846 REQUEST 3847 }; 3848 3849 /** 3850 * Tracks info about the requester. 3851 * Also used to notice when the calling process dies so we can self-expire 3852 */ 3853 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3854 final NetworkRequest request; 3855 final PendingIntent mPendingIntent; 3856 boolean mPendingIntentSent; 3857 private final IBinder mBinder; 3858 final int mPid; 3859 final int mUid; 3860 final Messenger messenger; 3861 private final NetworkRequestType mType; 3862 3863 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, NetworkRequestType type) { 3864 request = r; 3865 mPendingIntent = pi; 3866 messenger = null; 3867 mBinder = null; 3868 mPid = getCallingPid(); 3869 mUid = getCallingUid(); 3870 mType = type; 3871 enforceRequestCountLimit(); 3872 } 3873 3874 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, NetworkRequestType type) { 3875 super(); 3876 messenger = m; 3877 request = r; 3878 mBinder = binder; 3879 mPid = getCallingPid(); 3880 mUid = getCallingUid(); 3881 mType = type; 3882 mPendingIntent = null; 3883 enforceRequestCountLimit(); 3884 3885 try { 3886 mBinder.linkToDeath(this, 0); 3887 } catch (RemoteException e) { 3888 binderDied(); 3889 } 3890 } 3891 3892 private void enforceRequestCountLimit() { 3893 synchronized (mUidToNetworkRequestCount) { 3894 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 3895 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 3896 throw new IllegalArgumentException("Too many NetworkRequests filed"); 3897 } 3898 mUidToNetworkRequestCount.put(mUid, networkRequests); 3899 } 3900 } 3901 3902 private String typeString() { 3903 switch (mType) { 3904 case LISTEN: return "Listen"; 3905 case REQUEST: return "Request"; 3906 case TRACK_DEFAULT: return "Track default"; 3907 default: 3908 return "unknown type"; 3909 } 3910 } 3911 3912 void unlinkDeathRecipient() { 3913 if (mBinder != null) { 3914 mBinder.unlinkToDeath(this, 0); 3915 } 3916 } 3917 3918 public void binderDied() { 3919 log("ConnectivityService NetworkRequestInfo binderDied(" + 3920 request + ", " + mBinder + ")"); 3921 releaseNetworkRequest(request); 3922 } 3923 3924 /** 3925 * Returns true iff. the contained NetworkRequest is one that: 3926 * 3927 * - should be associated with at most one satisfying network 3928 * at a time; 3929 * 3930 * - should cause a network to be kept up if it is the only network 3931 * which can satisfy the NetworkReqeust. 3932 * 3933 * For full detail of how isRequest() is used for pairing Networks with 3934 * NetworkRequests read rematchNetworkAndRequests(). 3935 * 3936 * TODO: Rename to something more properly descriptive. 3937 */ 3938 public boolean isRequest() { 3939 return (mType == NetworkRequestType.TRACK_DEFAULT) || 3940 (mType == NetworkRequestType.REQUEST); 3941 } 3942 3943 public String toString() { 3944 return typeString() + 3945 " from uid/pid:" + mUid + "/" + mPid + 3946 " for " + request + 3947 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3948 } 3949 } 3950 3951 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3952 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3953 if (badCapability != null) { 3954 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3955 } 3956 } 3957 3958 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3959 final SortedSet<Integer> thresholds = new TreeSet(); 3960 synchronized (nai) { 3961 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3962 if (nri.request.networkCapabilities.hasSignalStrength() && 3963 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3964 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3965 } 3966 } 3967 } 3968 return new ArrayList<Integer>(thresholds); 3969 } 3970 3971 private void updateSignalStrengthThresholds( 3972 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3973 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3974 Bundle thresholds = new Bundle(); 3975 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3976 3977 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 3978 String detail; 3979 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3980 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3981 } else { 3982 detail = reason; 3983 } 3984 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3985 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3986 } 3987 3988 nai.asyncChannel.sendMessage( 3989 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3990 0, 0, thresholds); 3991 } 3992 3993 @Override 3994 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3995 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3996 final NetworkRequestType type = (networkCapabilities == null) 3997 ? NetworkRequestType.TRACK_DEFAULT 3998 : NetworkRequestType.REQUEST; 3999 // If the requested networkCapabilities is null, take them instead from 4000 // the default network request. This allows callers to keep track of 4001 // the system default network. 4002 if (type == NetworkRequestType.TRACK_DEFAULT) { 4003 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 4004 enforceAccessPermission(); 4005 } else { 4006 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4007 enforceNetworkRequestPermissions(networkCapabilities); 4008 } 4009 enforceMeteredApnPolicy(networkCapabilities); 4010 ensureRequestableCapabilities(networkCapabilities); 4011 4012 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 4013 throw new IllegalArgumentException("Bad timeout specified"); 4014 } 4015 4016 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 4017 .equals(networkCapabilities.getNetworkSpecifier())) { 4018 throw new IllegalArgumentException("Invalid network specifier - must not be '" 4019 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 4020 } 4021 4022 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 4023 nextNetworkRequestId()); 4024 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, type); 4025 if (DBG) log("requestNetwork for " + nri); 4026 4027 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 4028 if (timeoutMs > 0) { 4029 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 4030 nri), timeoutMs); 4031 } 4032 return networkRequest; 4033 } 4034 4035 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 4036 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 4037 enforceConnectivityInternalPermission(); 4038 } else { 4039 enforceChangePermission(); 4040 } 4041 } 4042 4043 @Override 4044 public boolean requestBandwidthUpdate(Network network) { 4045 enforceAccessPermission(); 4046 NetworkAgentInfo nai = null; 4047 if (network == null) { 4048 return false; 4049 } 4050 synchronized (mNetworkForNetId) { 4051 nai = mNetworkForNetId.get(network.netId); 4052 } 4053 if (nai != null) { 4054 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 4055 return true; 4056 } 4057 return false; 4058 } 4059 4060 4061 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 4062 // if UID is restricted, don't allow them to bring up metered APNs 4063 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 4064 final int uidRules; 4065 final int uid = Binder.getCallingUid(); 4066 synchronized(mRulesLock) { 4067 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 4068 } 4069 if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 4070 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { 4071 // we could silently fail or we can filter the available nets to only give 4072 // them those they have access to. Chose the more useful option. 4073 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 4074 } 4075 } 4076 } 4077 4078 @Override 4079 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 4080 PendingIntent operation) { 4081 checkNotNull(operation, "PendingIntent cannot be null."); 4082 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4083 enforceNetworkRequestPermissions(networkCapabilities); 4084 enforceMeteredApnPolicy(networkCapabilities); 4085 ensureRequestableCapabilities(networkCapabilities); 4086 4087 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4088 nextNetworkRequestId()); 4089 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 4090 NetworkRequestType.REQUEST); 4091 if (DBG) log("pendingRequest for " + nri); 4092 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4093 nri)); 4094 return networkRequest; 4095 } 4096 4097 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4098 mHandler.sendMessageDelayed( 4099 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4100 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4101 } 4102 4103 @Override 4104 public void releasePendingNetworkRequest(PendingIntent operation) { 4105 checkNotNull(operation, "PendingIntent cannot be null."); 4106 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4107 getCallingUid(), 0, operation)); 4108 } 4109 4110 // In order to implement the compatibility measure for pre-M apps that call 4111 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4112 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4113 // This ensures it has permission to do so. 4114 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4115 if (nc == null) { 4116 return false; 4117 } 4118 int[] transportTypes = nc.getTransportTypes(); 4119 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4120 return false; 4121 } 4122 try { 4123 mContext.enforceCallingOrSelfPermission( 4124 android.Manifest.permission.ACCESS_WIFI_STATE, 4125 "ConnectivityService"); 4126 } catch (SecurityException e) { 4127 return false; 4128 } 4129 return true; 4130 } 4131 4132 @Override 4133 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4134 Messenger messenger, IBinder binder) { 4135 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4136 enforceAccessPermission(); 4137 } 4138 4139 NetworkRequest networkRequest = new NetworkRequest( 4140 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 4141 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 4142 NetworkRequestType.LISTEN); 4143 if (VDBG) log("listenForNetwork for " + nri); 4144 4145 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4146 return networkRequest; 4147 } 4148 4149 @Override 4150 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4151 PendingIntent operation) { 4152 checkNotNull(operation, "PendingIntent cannot be null."); 4153 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4154 enforceAccessPermission(); 4155 } 4156 4157 NetworkRequest networkRequest = new NetworkRequest( 4158 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 4159 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 4160 NetworkRequestType.LISTEN); 4161 if (VDBG) log("pendingListenForNetwork for " + nri); 4162 4163 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4164 } 4165 4166 @Override 4167 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4168 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 4169 0, networkRequest)); 4170 } 4171 4172 @Override 4173 public void registerNetworkFactory(Messenger messenger, String name) { 4174 enforceConnectivityInternalPermission(); 4175 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4176 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4177 } 4178 4179 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4180 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4181 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4182 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4183 } 4184 4185 @Override 4186 public void unregisterNetworkFactory(Messenger messenger) { 4187 enforceConnectivityInternalPermission(); 4188 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4189 } 4190 4191 private void handleUnregisterNetworkFactory(Messenger messenger) { 4192 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4193 if (nfi == null) { 4194 loge("Failed to find Messenger in unregisterNetworkFactory"); 4195 return; 4196 } 4197 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4198 } 4199 4200 /** 4201 * NetworkAgentInfo supporting a request by requestId. 4202 * These have already been vetted (their Capabilities satisfy the request) 4203 * and the are the highest scored network available. 4204 * the are keyed off the Requests requestId. 4205 */ 4206 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4207 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4208 new SparseArray<NetworkAgentInfo>(); 4209 4210 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4211 @GuardedBy("mNetworkForNetId") 4212 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4213 new SparseArray<NetworkAgentInfo>(); 4214 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4215 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4216 // there may not be a strict 1:1 correlation between the two. 4217 @GuardedBy("mNetworkForNetId") 4218 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4219 4220 // NetworkAgentInfo keyed off its connecting messenger 4221 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4222 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4223 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4224 new HashMap<Messenger, NetworkAgentInfo>(); 4225 4226 @GuardedBy("mBlockedAppUids") 4227 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4228 4229 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4230 private final NetworkRequest mDefaultRequest; 4231 4232 // Request used to optionally keep mobile data active even when higher 4233 // priority networks like Wi-Fi are active. 4234 private final NetworkRequest mDefaultMobileDataRequest; 4235 4236 private NetworkAgentInfo getDefaultNetwork() { 4237 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4238 } 4239 4240 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4241 return nai == getDefaultNetwork(); 4242 } 4243 4244 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4245 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4246 int currentScore, NetworkMisc networkMisc) { 4247 enforceConnectivityInternalPermission(); 4248 4249 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4250 // satisfies mDefaultRequest. 4251 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4252 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4253 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4254 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4255 synchronized (this) { 4256 nai.networkMonitor.systemReady = mSystemReady; 4257 } 4258 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network); 4259 if (DBG) log("registerNetworkAgent " + nai); 4260 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4261 return nai.network.netId; 4262 } 4263 4264 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4265 if (VDBG) log("Got NetworkAgent Messenger"); 4266 mNetworkAgentInfos.put(na.messenger, na); 4267 synchronized (mNetworkForNetId) { 4268 mNetworkForNetId.put(na.network.netId, na); 4269 } 4270 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4271 NetworkInfo networkInfo = na.networkInfo; 4272 na.networkInfo = null; 4273 updateNetworkInfo(na, networkInfo); 4274 } 4275 4276 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4277 LinkProperties newLp = networkAgent.linkProperties; 4278 int netId = networkAgent.network.netId; 4279 4280 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4281 // we do anything else, make sure its LinkProperties are accurate. 4282 if (networkAgent.clatd != null) { 4283 networkAgent.clatd.fixupLinkProperties(oldLp); 4284 } 4285 4286 updateInterfaces(newLp, oldLp, netId); 4287 updateMtu(newLp, oldLp); 4288 // TODO - figure out what to do for clat 4289// for (LinkProperties lp : newLp.getStackedLinks()) { 4290// updateMtu(lp, null); 4291// } 4292 updateTcpBufferSizes(networkAgent); 4293 4294 updateRoutes(newLp, oldLp, netId); 4295 updateDnses(newLp, oldLp, netId); 4296 4297 updateClat(newLp, oldLp, networkAgent); 4298 if (isDefaultNetwork(networkAgent)) { 4299 handleApplyDefaultProxy(newLp.getHttpProxy()); 4300 } else { 4301 updateProxy(newLp, oldLp, networkAgent); 4302 } 4303 // TODO - move this check to cover the whole function 4304 if (!Objects.equals(newLp, oldLp)) { 4305 notifyIfacesChangedForNetworkStats(); 4306 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4307 } 4308 4309 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4310 } 4311 4312 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4313 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4314 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4315 4316 if (!wasRunningClat && shouldRunClat) { 4317 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4318 nai.clatd.start(); 4319 } else if (wasRunningClat && !shouldRunClat) { 4320 nai.clatd.stop(); 4321 } 4322 } 4323 4324 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4325 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4326 if (oldLp != null) { 4327 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4328 } else if (newLp != null) { 4329 interfaceDiff.added = newLp.getAllInterfaceNames(); 4330 } 4331 for (String iface : interfaceDiff.added) { 4332 try { 4333 if (DBG) log("Adding iface " + iface + " to network " + netId); 4334 mNetd.addInterfaceToNetwork(iface, netId); 4335 } catch (Exception e) { 4336 loge("Exception adding interface: " + e); 4337 } 4338 } 4339 for (String iface : interfaceDiff.removed) { 4340 try { 4341 if (DBG) log("Removing iface " + iface + " from network " + netId); 4342 mNetd.removeInterfaceFromNetwork(iface, netId); 4343 } catch (Exception e) { 4344 loge("Exception removing interface: " + e); 4345 } 4346 } 4347 } 4348 4349 /** 4350 * Have netd update routes from oldLp to newLp. 4351 * @return true if routes changed between oldLp and newLp 4352 */ 4353 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4354 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4355 if (oldLp != null) { 4356 routeDiff = oldLp.compareAllRoutes(newLp); 4357 } else if (newLp != null) { 4358 routeDiff.added = newLp.getAllRoutes(); 4359 } 4360 4361 // add routes before removing old in case it helps with continuous connectivity 4362 4363 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4364 for (RouteInfo route : routeDiff.added) { 4365 if (route.hasGateway()) continue; 4366 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4367 try { 4368 mNetd.addRoute(netId, route); 4369 } catch (Exception e) { 4370 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4371 loge("Exception in addRoute for non-gateway: " + e); 4372 } 4373 } 4374 } 4375 for (RouteInfo route : routeDiff.added) { 4376 if (route.hasGateway() == false) continue; 4377 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4378 try { 4379 mNetd.addRoute(netId, route); 4380 } catch (Exception e) { 4381 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4382 loge("Exception in addRoute for gateway: " + e); 4383 } 4384 } 4385 } 4386 4387 for (RouteInfo route : routeDiff.removed) { 4388 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4389 try { 4390 mNetd.removeRoute(netId, route); 4391 } catch (Exception e) { 4392 loge("Exception in removeRoute: " + e); 4393 } 4394 } 4395 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4396 } 4397 4398 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4399 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4400 return; // no updating necessary 4401 } 4402 4403 Collection<InetAddress> dnses = newLp.getDnsServers(); 4404 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4405 try { 4406 mNetd.setDnsConfigurationForNetwork( 4407 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4408 } catch (Exception e) { 4409 loge("Exception in setDnsConfigurationForNetwork: " + e); 4410 } 4411 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4412 if (defaultNai != null && defaultNai.network.netId == netId) { 4413 setDefaultDnsSystemProperties(dnses); 4414 } 4415 flushVmDnsCache(); 4416 } 4417 4418 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4419 int last = 0; 4420 for (InetAddress dns : dnses) { 4421 ++last; 4422 String key = "net.dns" + last; 4423 String value = dns.getHostAddress(); 4424 SystemProperties.set(key, value); 4425 } 4426 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4427 String key = "net.dns" + i; 4428 SystemProperties.set(key, ""); 4429 } 4430 mNumDnsEntries = last; 4431 } 4432 4433 /** 4434 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4435 * augmented with any stateful capabilities implied from {@code networkAgent} 4436 * (e.g., validated status and captive portal status). 4437 * 4438 * @param nai the network having its capabilities updated. 4439 * @param networkCapabilities the new network capabilities. 4440 */ 4441 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4442 // Don't modify caller's NetworkCapabilities. 4443 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4444 if (nai.lastValidated) { 4445 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4446 } else { 4447 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4448 } 4449 if (nai.lastCaptivePortalDetected) { 4450 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4451 } else { 4452 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4453 } 4454 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4455 final int oldScore = nai.getCurrentScore(); 4456 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4457 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4458 try { 4459 mNetd.setNetworkPermission(nai.network.netId, 4460 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4461 null : NetworkManagementService.PERMISSION_SYSTEM); 4462 } catch (RemoteException e) { 4463 loge("Exception in setNetworkPermission: " + e); 4464 } 4465 } 4466 synchronized (nai) { 4467 nai.networkCapabilities = networkCapabilities; 4468 } 4469 rematchAllNetworksAndRequests(nai, oldScore); 4470 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4471 } 4472 } 4473 4474 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4475 for (int i = 0; i < nai.networkRequests.size(); i++) { 4476 NetworkRequest nr = nai.networkRequests.valueAt(i); 4477 // Don't send listening requests to factories. b/17393458 4478 if (!isRequest(nr)) continue; 4479 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4480 } 4481 } 4482 4483 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4484 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4485 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4486 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4487 networkRequest); 4488 } 4489 } 4490 4491 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4492 int notificationType) { 4493 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4494 Intent intent = new Intent(); 4495 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4496 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4497 nri.mPendingIntentSent = true; 4498 sendIntent(nri.mPendingIntent, intent); 4499 } 4500 // else not handled 4501 } 4502 4503 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4504 mPendingIntentWakeLock.acquire(); 4505 try { 4506 if (DBG) log("Sending " + pendingIntent); 4507 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4508 } catch (PendingIntent.CanceledException e) { 4509 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4510 mPendingIntentWakeLock.release(); 4511 releasePendingNetworkRequest(pendingIntent); 4512 } 4513 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4514 } 4515 4516 @Override 4517 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4518 String resultData, Bundle resultExtras) { 4519 if (DBG) log("Finished sending " + pendingIntent); 4520 mPendingIntentWakeLock.release(); 4521 // Release with a delay so the receiving client has an opportunity to put in its 4522 // own request. 4523 releasePendingNetworkRequestWithDelay(pendingIntent); 4524 } 4525 4526 private void callCallbackForRequest(NetworkRequestInfo nri, 4527 NetworkAgentInfo networkAgent, int notificationType) { 4528 if (nri.messenger == null) return; // Default request has no msgr 4529 Bundle bundle = new Bundle(); 4530 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4531 new NetworkRequest(nri.request)); 4532 Message msg = Message.obtain(); 4533 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4534 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4535 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4536 } 4537 switch (notificationType) { 4538 case ConnectivityManager.CALLBACK_LOSING: { 4539 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4540 break; 4541 } 4542 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4543 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4544 new NetworkCapabilities(networkAgent.networkCapabilities)); 4545 break; 4546 } 4547 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4548 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4549 new LinkProperties(networkAgent.linkProperties)); 4550 break; 4551 } 4552 } 4553 msg.what = notificationType; 4554 msg.setData(bundle); 4555 try { 4556 if (VDBG) { 4557 log("sending notification " + notifyTypeToName(notificationType) + 4558 " for " + nri.request); 4559 } 4560 nri.messenger.send(msg); 4561 } catch (RemoteException e) { 4562 // may occur naturally in the race of binder death. 4563 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4564 } 4565 } 4566 4567 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4568 for (int i = 0; i < nai.networkRequests.size(); i++) { 4569 NetworkRequest nr = nai.networkRequests.valueAt(i); 4570 // Ignore listening requests. 4571 if (!isRequest(nr)) continue; 4572 loge("Dead network still had at least " + nr); 4573 break; 4574 } 4575 nai.asyncChannel.disconnect(); 4576 } 4577 4578 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4579 if (oldNetwork == null) { 4580 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4581 return; 4582 } 4583 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4584 teardownUnneededNetwork(oldNetwork); 4585 } 4586 4587 private void makeDefault(NetworkAgentInfo newNetwork, NetworkAgentInfo prevNetwork) { 4588 if (DBG) log("Switching to new default network: " + newNetwork); 4589 setupDataActivityTracking(newNetwork); 4590 try { 4591 mNetd.setDefaultNetId(newNetwork.network.netId); 4592 } catch (Exception e) { 4593 loge("Exception setting default network :" + e); 4594 } 4595 notifyLockdownVpn(newNetwork); 4596 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4597 updateTcpBufferSizes(newNetwork); 4598 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4599 logDefaultNetworkEvent(newNetwork, prevNetwork); 4600 } 4601 4602 // Handles a network appearing or improving its score. 4603 // 4604 // - Evaluates all current NetworkRequests that can be 4605 // satisfied by newNetwork, and reassigns to newNetwork 4606 // any such requests for which newNetwork is the best. 4607 // 4608 // - Lingers any validated Networks that as a result are no longer 4609 // needed. A network is needed if it is the best network for 4610 // one or more NetworkRequests, or if it is a VPN. 4611 // 4612 // - Tears down newNetwork if it just became validated 4613 // but turns out to be unneeded. 4614 // 4615 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4616 // networks that have no chance (i.e. even if validated) 4617 // of becoming the highest scoring network. 4618 // 4619 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4620 // it does not remove NetworkRequests that other Networks could better satisfy. 4621 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4622 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4623 // as it performs better by a factor of the number of Networks. 4624 // 4625 // @param newNetwork is the network to be matched against NetworkRequests. 4626 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4627 // performed to tear down unvalidated networks that have no chance (i.e. even if 4628 // validated) of becoming the highest scoring network. 4629 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4630 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4631 if (!newNetwork.everConnected) return; 4632 boolean keep = newNetwork.isVPN(); 4633 boolean isNewDefault = false; 4634 NetworkAgentInfo oldDefaultNetwork = null; 4635 if (VDBG) log("rematching " + newNetwork.name()); 4636 // Find and migrate to this Network any NetworkRequests for 4637 // which this network is now the best. 4638 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4639 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4640 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4641 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4642 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4643 final boolean satisfies = newNetwork.satisfies(nri.request); 4644 if (newNetwork == currentNetwork && satisfies) { 4645 if (VDBG) { 4646 log("Network " + newNetwork.name() + " was already satisfying" + 4647 " request " + nri.request.requestId + ". No change."); 4648 } 4649 keep = true; 4650 continue; 4651 } 4652 4653 // check if it satisfies the NetworkCapabilities 4654 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4655 if (satisfies) { 4656 if (!nri.isRequest()) { 4657 // This is not a request, it's a callback listener. 4658 // Add it to newNetwork regardless of score. 4659 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4660 continue; 4661 } 4662 4663 // next check if it's better than any current network we're using for 4664 // this request 4665 if (VDBG) { 4666 log("currentScore = " + 4667 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4668 ", newScore = " + newNetwork.getCurrentScore()); 4669 } 4670 if (currentNetwork == null || 4671 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4672 if (VDBG) log("rematch for " + newNetwork.name()); 4673 if (currentNetwork != null) { 4674 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4675 currentNetwork.networkRequests.remove(nri.request.requestId); 4676 currentNetwork.networkLingered.add(nri.request); 4677 affectedNetworks.add(currentNetwork); 4678 } else { 4679 if (VDBG) log(" accepting network in place of null"); 4680 } 4681 unlinger(newNetwork); 4682 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4683 if (!newNetwork.addRequest(nri.request)) { 4684 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4685 } 4686 addedRequests.add(nri); 4687 keep = true; 4688 // Tell NetworkFactories about the new score, so they can stop 4689 // trying to connect if they know they cannot match it. 4690 // TODO - this could get expensive if we have alot of requests for this 4691 // network. Think about if there is a way to reduce this. Push 4692 // netid->request mapping to each factory? 4693 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4694 if (mDefaultRequest.requestId == nri.request.requestId) { 4695 isNewDefault = true; 4696 oldDefaultNetwork = currentNetwork; 4697 } 4698 } 4699 } else if (newNetwork.networkRequests.get(nri.request.requestId) != null) { 4700 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4701 // mark it as no longer satisfying "nri". Because networks are processed by 4702 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4703 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4704 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4705 // This means this code doesn't have to handle the case where "currentNetwork" no 4706 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4707 if (DBG) { 4708 log("Network " + newNetwork.name() + " stopped satisfying" + 4709 " request " + nri.request.requestId); 4710 } 4711 newNetwork.networkRequests.remove(nri.request.requestId); 4712 if (currentNetwork == newNetwork) { 4713 mNetworkForRequestId.remove(nri.request.requestId); 4714 sendUpdatedScoreToFactories(nri.request, 0); 4715 } else { 4716 if (nri.isRequest()) { 4717 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4718 newNetwork.name() + 4719 " without updating mNetworkForRequestId or factories!"); 4720 } 4721 } 4722 // TODO: technically, sending CALLBACK_LOST here is 4723 // incorrect if nri is a request (not a listen) and there 4724 // is a replacement network currently connected that can 4725 // satisfy it. However, the only capability that can both 4726 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4727 // so this code is only incorrect for a network that loses 4728 // the TRUSTED capability, which is a rare case. 4729 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST); 4730 } 4731 } 4732 // Linger any networks that are no longer needed. 4733 for (NetworkAgentInfo nai : affectedNetworks) { 4734 if (nai.lingering) { 4735 // Already lingered. Nothing to do. This can only happen if "nai" is in 4736 // "affectedNetworks" twice. The reasoning being that to get added to 4737 // "affectedNetworks", "nai" must have been satisfying a NetworkRequest 4738 // (i.e. not lingered) so it could have only been lingered by this loop. 4739 // unneeded(nai) will be false and we'll call unlinger() below which would 4740 // be bad, so handle it here. 4741 } else if (unneeded(nai)) { 4742 linger(nai); 4743 } else { 4744 // Clear nai.networkLingered we might have added above. 4745 unlinger(nai); 4746 } 4747 } 4748 if (isNewDefault) { 4749 // Notify system services that this network is up. 4750 makeDefault(newNetwork, oldDefaultNetwork); 4751 synchronized (ConnectivityService.this) { 4752 // have a new default network, release the transition wakelock in 4753 // a second if it's held. The second pause is to allow apps 4754 // to reconnect over the new network 4755 if (mNetTransitionWakeLock.isHeld()) { 4756 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4757 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4758 mNetTransitionWakeLockSerialNumber, 0), 4759 1000); 4760 } 4761 } 4762 } 4763 4764 // do this after the default net is switched, but 4765 // before LegacyTypeTracker sends legacy broadcasts 4766 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4767 4768 if (isNewDefault) { 4769 // Maintain the illusion: since the legacy API only 4770 // understands one network at a time, we must pretend 4771 // that the current default network disconnected before 4772 // the new one connected. 4773 if (oldDefaultNetwork != null) { 4774 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4775 oldDefaultNetwork, true); 4776 } 4777 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4778 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4779 notifyLockdownVpn(newNetwork); 4780 } 4781 4782 if (keep) { 4783 // Notify battery stats service about this network, both the normal 4784 // interface and any stacked links. 4785 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4786 try { 4787 final IBatteryStats bs = BatteryStatsService.getService(); 4788 final int type = newNetwork.networkInfo.getType(); 4789 4790 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4791 bs.noteNetworkInterfaceType(baseIface, type); 4792 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4793 final String stackedIface = stacked.getInterfaceName(); 4794 bs.noteNetworkInterfaceType(stackedIface, type); 4795 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4796 } 4797 } catch (RemoteException ignored) { 4798 } 4799 4800 // This has to happen after the notifyNetworkCallbacks as that tickles each 4801 // ConnectivityManager instance so that legacy requests correctly bind dns 4802 // requests to this network. The legacy users are listening for this bcast 4803 // and will generally do a dns request so they can ensureRouteToHost and if 4804 // they do that before the callbacks happen they'll use the default network. 4805 // 4806 // TODO: Is there still a race here? We send the broadcast 4807 // after sending the callback, but if the app can receive the 4808 // broadcast before the callback, it might still break. 4809 // 4810 // This *does* introduce a race where if the user uses the new api 4811 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4812 // they may get old info. Reverse this after the old startUsing api is removed. 4813 // This is on top of the multiple intent sequencing referenced in the todo above. 4814 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4815 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4816 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4817 // legacy type tracker filters out repeat adds 4818 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4819 } 4820 } 4821 4822 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4823 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4824 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4825 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4826 if (newNetwork.isVPN()) { 4827 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4828 } 4829 } 4830 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4831 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4832 if (unneeded(nai)) { 4833 if (DBG) log("Reaping " + nai.name()); 4834 teardownUnneededNetwork(nai); 4835 } 4836 } 4837 } 4838 } 4839 4840 /** 4841 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4842 * being disconnected. 4843 * @param changed If only one Network's score or capabilities have been modified since the last 4844 * time this function was called, pass this Network in this argument, otherwise pass 4845 * null. 4846 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4847 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4848 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4849 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4850 * network's score. 4851 */ 4852 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4853 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4854 // to avoid the slowness. It is not simply enough to process just "changed", for 4855 // example in the case where "changed"'s score decreases and another network should begin 4856 // satifying a NetworkRequest that "changed" currently satisfies. 4857 4858 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4859 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4860 // rematchNetworkAndRequests() handles. 4861 if (changed != null && oldScore < changed.getCurrentScore()) { 4862 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP); 4863 } else { 4864 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4865 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4866 // Rematch higher scoring networks first to prevent requests first matching a lower 4867 // scoring network and then a higher scoring network, which could produce multiple 4868 // callbacks and inadvertently unlinger networks. 4869 Arrays.sort(nais); 4870 for (NetworkAgentInfo nai : nais) { 4871 rematchNetworkAndRequests(nai, 4872 // Only reap the last time through the loop. Reaping before all rematching 4873 // is complete could incorrectly teardown a network that hasn't yet been 4874 // rematched. 4875 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4876 : ReapUnvalidatedNetworks.REAP); 4877 } 4878 } 4879 } 4880 4881 private void updateInetCondition(NetworkAgentInfo nai) { 4882 // Don't bother updating until we've graduated to validated at least once. 4883 if (!nai.everValidated) return; 4884 // For now only update icons for default connection. 4885 // TODO: Update WiFi and cellular icons separately. b/17237507 4886 if (!isDefaultNetwork(nai)) return; 4887 4888 int newInetCondition = nai.lastValidated ? 100 : 0; 4889 // Don't repeat publish. 4890 if (newInetCondition == mDefaultInetConditionPublished) return; 4891 4892 mDefaultInetConditionPublished = newInetCondition; 4893 sendInetConditionBroadcast(nai.networkInfo); 4894 } 4895 4896 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4897 if (mLockdownTracker != null) { 4898 if (nai != null && nai.isVPN()) { 4899 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4900 } else { 4901 mLockdownTracker.onNetworkInfoChanged(); 4902 } 4903 } 4904 } 4905 4906 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4907 NetworkInfo.State state = newInfo.getState(); 4908 NetworkInfo oldInfo = null; 4909 final int oldScore = networkAgent.getCurrentScore(); 4910 synchronized (networkAgent) { 4911 oldInfo = networkAgent.networkInfo; 4912 networkAgent.networkInfo = newInfo; 4913 } 4914 notifyLockdownVpn(networkAgent); 4915 4916 if (oldInfo != null && oldInfo.getState() == state) { 4917 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 4918 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 4919 notifyIfacesChangedForNetworkStats(); 4920 } else if (VDBG) log("ignoring duplicate network state non-change"); 4921 // In either case, no further work should be needed. 4922 return; 4923 } 4924 if (DBG) { 4925 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4926 (oldInfo == null ? "null" : oldInfo.getState()) + 4927 " to " + state); 4928 } 4929 4930 if (!networkAgent.created 4931 && (state == NetworkInfo.State.CONNECTED 4932 || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { 4933 try { 4934 // This should never fail. Specifying an already in use NetID will cause failure. 4935 if (networkAgent.isVPN()) { 4936 mNetd.createVirtualNetwork(networkAgent.network.netId, 4937 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4938 (networkAgent.networkMisc == null || 4939 !networkAgent.networkMisc.allowBypass)); 4940 } else { 4941 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4942 networkAgent.networkCapabilities.hasCapability( 4943 NET_CAPABILITY_NOT_RESTRICTED) ? 4944 null : NetworkManagementService.PERMISSION_SYSTEM); 4945 } 4946 } catch (Exception e) { 4947 loge("Error creating network " + networkAgent.network.netId + ": " 4948 + e.getMessage()); 4949 return; 4950 } 4951 networkAgent.created = true; 4952 } 4953 4954 if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { 4955 networkAgent.everConnected = true; 4956 4957 updateLinkProperties(networkAgent, null); 4958 notifyIfacesChangedForNetworkStats(); 4959 4960 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4961 scheduleUnvalidatedPrompt(networkAgent); 4962 4963 if (networkAgent.isVPN()) { 4964 // Temporarily disable the default proxy (not global). 4965 synchronized (mProxyLock) { 4966 if (!mDefaultProxyDisabled) { 4967 mDefaultProxyDisabled = true; 4968 if (mGlobalProxy == null && mDefaultProxy != null) { 4969 sendProxyBroadcast(null); 4970 } 4971 } 4972 } 4973 // TODO: support proxy per network. 4974 } 4975 4976 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 4977 // be communicated to a particular NetworkAgent depends only on the network's immutable, 4978 // capabilities, so it only needs to be done once on initial connect, not every time the 4979 // network's capabilities change. Note that we do this before rematching the network, 4980 // so we could decide to tear it down immediately afterwards. That's fine though - on 4981 // disconnection NetworkAgents should stop any signal strength monitoring they have been 4982 // doing. 4983 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 4984 4985 // Consider network even though it is not yet validated. 4986 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP); 4987 4988 // This has to happen after matching the requests, because callbacks are just requests. 4989 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4990 } else if (state == NetworkInfo.State.DISCONNECTED) { 4991 networkAgent.asyncChannel.disconnect(); 4992 if (networkAgent.isVPN()) { 4993 synchronized (mProxyLock) { 4994 if (mDefaultProxyDisabled) { 4995 mDefaultProxyDisabled = false; 4996 if (mGlobalProxy == null && mDefaultProxy != null) { 4997 sendProxyBroadcast(mDefaultProxy); 4998 } 4999 } 5000 } 5001 } 5002 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 5003 state == NetworkInfo.State.SUSPENDED) { 5004 // going into or coming out of SUSPEND: rescore and notify 5005 if (networkAgent.getCurrentScore() != oldScore) { 5006 rematchAllNetworksAndRequests(networkAgent, oldScore); 5007 } 5008 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 5009 ConnectivityManager.CALLBACK_SUSPENDED : 5010 ConnectivityManager.CALLBACK_RESUMED)); 5011 mLegacyTypeTracker.update(networkAgent); 5012 } 5013 } 5014 5015 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 5016 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 5017 if (score < 0) { 5018 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 5019 "). Bumping score to min of 0"); 5020 score = 0; 5021 } 5022 5023 final int oldScore = nai.getCurrentScore(); 5024 nai.setCurrentScore(score); 5025 5026 rematchAllNetworksAndRequests(nai, oldScore); 5027 5028 sendUpdatedScoreToFactories(nai); 5029 } 5030 5031 // notify only this one new request of the current state 5032 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 5033 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 5034 // TODO - read state from monitor to decide what to send. 5035// if (nai.networkMonitor.isLingering()) { 5036// notifyType = NetworkCallbacks.LOSING; 5037// } else if (nai.networkMonitor.isEvaluating()) { 5038// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 5039// } 5040 if (nri.mPendingIntent == null) { 5041 callCallbackForRequest(nri, nai, notifyType); 5042 } else { 5043 sendPendingIntentForRequest(nri, nai, notifyType); 5044 } 5045 } 5046 5047 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 5048 // The NetworkInfo we actually send out has no bearing on the real 5049 // state of affairs. For example, if the default connection is mobile, 5050 // and a request for HIPRI has just gone away, we need to pretend that 5051 // HIPRI has just disconnected. So we need to set the type to HIPRI and 5052 // the state to DISCONNECTED, even though the network is of type MOBILE 5053 // and is still connected. 5054 NetworkInfo info = new NetworkInfo(nai.networkInfo); 5055 info.setType(type); 5056 if (state != DetailedState.DISCONNECTED) { 5057 info.setDetailedState(state, null, info.getExtraInfo()); 5058 sendConnectedBroadcast(info); 5059 } else { 5060 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 5061 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 5062 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 5063 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 5064 if (info.isFailover()) { 5065 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 5066 nai.networkInfo.setFailover(false); 5067 } 5068 if (info.getReason() != null) { 5069 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 5070 } 5071 if (info.getExtraInfo() != null) { 5072 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 5073 } 5074 NetworkAgentInfo newDefaultAgent = null; 5075 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 5076 newDefaultAgent = getDefaultNetwork(); 5077 if (newDefaultAgent != null) { 5078 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 5079 newDefaultAgent.networkInfo); 5080 } else { 5081 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 5082 } 5083 } 5084 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 5085 mDefaultInetConditionPublished); 5086 sendStickyBroadcast(intent); 5087 if (newDefaultAgent != null) { 5088 sendConnectedBroadcast(newDefaultAgent.networkInfo); 5089 } 5090 } 5091 } 5092 5093 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5094 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5095 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 5096 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 5097 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5098 if (VDBG) log(" sending notification for " + nr); 5099 if (nri.mPendingIntent == null) { 5100 callCallbackForRequest(nri, networkAgent, notifyType); 5101 } else { 5102 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5103 } 5104 } 5105 } 5106 5107 private String notifyTypeToName(int notifyType) { 5108 switch (notifyType) { 5109 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5110 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5111 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5112 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5113 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5114 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5115 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5116 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5117 } 5118 return "UNKNOWN"; 5119 } 5120 5121 /** 5122 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5123 * properties tracked by NetworkStatsService on an active iface has changed. 5124 */ 5125 private void notifyIfacesChangedForNetworkStats() { 5126 try { 5127 mStatsService.forceUpdateIfaces(); 5128 } catch (Exception ignored) { 5129 } 5130 } 5131 5132 @Override 5133 public boolean addVpnAddress(String address, int prefixLength) { 5134 throwIfLockdownEnabled(); 5135 int user = UserHandle.getUserId(Binder.getCallingUid()); 5136 synchronized (mVpns) { 5137 return mVpns.get(user).addAddress(address, prefixLength); 5138 } 5139 } 5140 5141 @Override 5142 public boolean removeVpnAddress(String address, int prefixLength) { 5143 throwIfLockdownEnabled(); 5144 int user = UserHandle.getUserId(Binder.getCallingUid()); 5145 synchronized (mVpns) { 5146 return mVpns.get(user).removeAddress(address, prefixLength); 5147 } 5148 } 5149 5150 @Override 5151 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5152 throwIfLockdownEnabled(); 5153 int user = UserHandle.getUserId(Binder.getCallingUid()); 5154 boolean success; 5155 synchronized (mVpns) { 5156 success = mVpns.get(user).setUnderlyingNetworks(networks); 5157 } 5158 if (success) { 5159 notifyIfacesChangedForNetworkStats(); 5160 } 5161 return success; 5162 } 5163 5164 @Override 5165 public String getCaptivePortalServerUrl() { 5166 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5167 } 5168 5169 @Override 5170 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5171 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5172 enforceKeepalivePermission(); 5173 mKeepaliveTracker.startNattKeepalive( 5174 getNetworkAgentInfoForNetwork(network), 5175 intervalSeconds, messenger, binder, 5176 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5177 } 5178 5179 @Override 5180 public void stopKeepalive(Network network, int slot) { 5181 mHandler.sendMessage(mHandler.obtainMessage( 5182 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5183 } 5184 5185 @Override 5186 public void factoryReset() { 5187 enforceConnectivityInternalPermission(); 5188 5189 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5190 return; 5191 } 5192 5193 final int userId = UserHandle.getCallingUserId(); 5194 5195 // Turn airplane mode off 5196 setAirplaneMode(false); 5197 5198 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5199 // Untether 5200 for (String tether : getTetheredIfaces()) { 5201 untether(tether); 5202 } 5203 } 5204 5205 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5206 // Turn VPN off 5207 VpnConfig vpnConfig = getVpnConfig(userId); 5208 if (vpnConfig != null) { 5209 if (vpnConfig.legacy) { 5210 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5211 } else { 5212 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5213 // in the future without user intervention. 5214 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5215 5216 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN, userId); 5217 } 5218 } 5219 } 5220 } 5221 5222 @VisibleForTesting 5223 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5224 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5225 return new NetworkMonitor(context, handler, nai, defaultRequest); 5226 } 5227 5228 private static void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5229 int newNetid = NETID_UNSET; 5230 int prevNetid = NETID_UNSET; 5231 int[] transports = new int[0]; 5232 boolean hadIPv4 = false; 5233 boolean hadIPv6 = false; 5234 5235 if (newNai != null) { 5236 newNetid = newNai.network.netId; 5237 transports = newNai.networkCapabilities.getTransportTypes(); 5238 } 5239 if (prevNai != null) { 5240 prevNetid = prevNai.network.netId; 5241 final LinkProperties lp = prevNai.linkProperties; 5242 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5243 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5244 } 5245 5246 DefaultNetworkEvent.logEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6); 5247 } 5248} 5249