ConnectivityService.java revision ad2e4bf9f36cf612db6c397feca8effb125ee541
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 31import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 32import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 33import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 34import android.annotation.Nullable; 35import android.app.BroadcastOptions; 36import android.app.Notification; 37import android.app.NotificationManager; 38import android.app.PendingIntent; 39import android.content.BroadcastReceiver; 40import android.content.ContentResolver; 41import android.content.Context; 42import android.content.Intent; 43import android.content.IntentFilter; 44import android.content.pm.PackageManager; 45import android.content.res.Configuration; 46import android.content.res.Resources; 47import android.database.ContentObserver; 48import android.net.ConnectivityManager; 49import android.net.ConnectivityManager.PacketKeepalive; 50import android.net.IConnectivityManager; 51import android.net.INetworkManagementEventObserver; 52import android.net.INetworkPolicyListener; 53import android.net.INetworkPolicyManager; 54import android.net.INetworkStatsService; 55import android.net.LinkProperties; 56import android.net.LinkProperties.CompareResult; 57import android.net.Network; 58import android.net.NetworkAgent; 59import android.net.NetworkCapabilities; 60import android.net.NetworkConfig; 61import android.net.NetworkInfo; 62import android.net.NetworkInfo.DetailedState; 63import android.net.NetworkMisc; 64import android.net.NetworkQuotaInfo; 65import android.net.NetworkRequest; 66import android.net.NetworkState; 67import android.net.NetworkUtils; 68import android.net.Proxy; 69import android.net.ProxyInfo; 70import android.net.RouteInfo; 71import android.net.UidRange; 72import android.net.Uri; 73import android.net.metrics.DefaultNetworkEvent; 74import android.net.metrics.NetworkEvent; 75import android.os.Binder; 76import android.os.Build; 77import android.os.Bundle; 78import android.os.FileUtils; 79import android.os.Handler; 80import android.os.HandlerThread; 81import android.os.IBinder; 82import android.os.INetworkManagementService; 83import android.os.Looper; 84import android.os.Message; 85import android.os.Messenger; 86import android.os.ParcelFileDescriptor; 87import android.os.PowerManager; 88import android.os.Process; 89import android.os.RemoteException; 90import android.os.ResultReceiver; 91import android.os.SystemProperties; 92import android.os.UserHandle; 93import android.os.UserManager; 94import android.provider.Settings; 95import android.security.Credentials; 96import android.security.KeyStore; 97import android.telephony.TelephonyManager; 98import android.text.TextUtils; 99import android.util.LocalLog; 100import android.util.LocalLog.ReadOnlyLocalLog; 101import android.util.Pair; 102import android.util.Slog; 103import android.util.SparseArray; 104import android.util.SparseBooleanArray; 105import android.util.SparseIntArray; 106import android.util.Xml; 107 108import com.android.internal.R; 109import com.android.internal.annotations.GuardedBy; 110import com.android.internal.annotations.VisibleForTesting; 111import com.android.internal.app.IBatteryStats; 112import com.android.internal.net.LegacyVpnInfo; 113import com.android.internal.net.NetworkStatsFactory; 114import com.android.internal.net.VpnConfig; 115import com.android.internal.net.VpnInfo; 116import com.android.internal.net.VpnProfile; 117import com.android.internal.util.AsyncChannel; 118import com.android.internal.util.IndentingPrintWriter; 119import com.android.internal.util.MessageUtils; 120import com.android.internal.util.XmlUtils; 121import com.android.server.am.BatteryStatsService; 122import com.android.server.connectivity.DataConnectionStats; 123import com.android.server.connectivity.KeepaliveTracker; 124import com.android.server.connectivity.NetworkDiagnostics; 125import com.android.server.connectivity.Nat464Xlat; 126import com.android.server.connectivity.NetworkAgentInfo; 127import com.android.server.connectivity.NetworkMonitor; 128import com.android.server.connectivity.PacManager; 129import com.android.server.connectivity.PermissionMonitor; 130import com.android.server.connectivity.Tethering; 131import com.android.server.connectivity.Vpn; 132import com.android.server.net.BaseNetworkObserver; 133import com.android.server.net.LockdownVpnTracker; 134import com.google.android.collect.Lists; 135import com.google.android.collect.Sets; 136 137import org.xmlpull.v1.XmlPullParser; 138import org.xmlpull.v1.XmlPullParserException; 139 140import java.io.File; 141import java.io.FileDescriptor; 142import java.io.FileNotFoundException; 143import java.io.FileReader; 144import java.io.IOException; 145import java.io.PrintWriter; 146import java.net.Inet4Address; 147import java.net.InetAddress; 148import java.net.UnknownHostException; 149import java.util.ArrayDeque; 150import java.util.ArrayList; 151import java.util.Arrays; 152import java.util.Collection; 153import java.util.HashMap; 154import java.util.HashSet; 155import java.util.SortedSet; 156import java.util.TreeSet; 157import java.util.List; 158import java.util.Map; 159import java.util.Objects; 160 161/** 162 * @hide 163 */ 164public class ConnectivityService extends IConnectivityManager.Stub 165 implements PendingIntent.OnFinished { 166 private static final String TAG = "ConnectivityService"; 167 168 private static final boolean DBG = true; 169 private static final boolean VDBG = false; 170 171 private static final boolean LOGD_RULES = false; 172 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 173 174 // TODO: create better separation between radio types and network types 175 176 // how long to wait before switching back to a radio's default network 177 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 178 // system property that can override the above value 179 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 180 "android.telephony.apn-restore"; 181 182 // How long to wait before putting up a "This network doesn't have an Internet connection, 183 // connect anyway?" dialog after the user selects a network that doesn't validate. 184 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 185 186 // How long to delay to removal of a pending intent based request. 187 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 188 private final int mReleasePendingIntentDelayMs; 189 190 private Tethering mTethering; 191 192 private final PermissionMonitor mPermissionMonitor; 193 194 private KeyStore mKeyStore; 195 196 @GuardedBy("mVpns") 197 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 198 199 private boolean mLockdownEnabled; 200 private LockdownVpnTracker mLockdownTracker; 201 202 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 203 private Object mRulesLock = new Object(); 204 /** Currently active network rules by UID. */ 205 private SparseIntArray mUidRules = new SparseIntArray(); 206 /** Set of ifaces that are costly. */ 207 private HashSet<String> mMeteredIfaces = Sets.newHashSet(); 208 209 final private Context mContext; 210 private int mNetworkPreference; 211 // 0 is full bad, 100 is full good 212 private int mDefaultInetConditionPublished = 0; 213 214 private int mNumDnsEntries; 215 216 private boolean mTestMode; 217 private static ConnectivityService sServiceInstance; 218 219 private INetworkManagementService mNetd; 220 private INetworkStatsService mStatsService; 221 private INetworkPolicyManager mPolicyManager; 222 223 private String mCurrentTcpBufferSizes; 224 225 private static final int ENABLED = 1; 226 private static final int DISABLED = 0; 227 228 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 229 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class }); 230 231 private enum ReapUnvalidatedNetworks { 232 // Tear down networks that have no chance (e.g. even if validated) of becoming 233 // the highest scoring network satisfying a NetworkRequest. This should be passed when 234 // all networks have been rematched against all NetworkRequests. 235 REAP, 236 // Don't reap networks. This should be passed when some networks have not yet been 237 // rematched against all NetworkRequests. 238 DONT_REAP 239 }; 240 241 /** 242 * used internally to change our mobile data enabled flag 243 */ 244 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 245 246 /** 247 * used internally to clear a wakelock when transitioning 248 * from one net to another. Clear happens when we get a new 249 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 250 * after a timeout if no network is found (typically 1 min). 251 */ 252 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 253 254 /** 255 * used internally to reload global proxy settings 256 */ 257 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 258 259 /** 260 * PAC manager has received new port. 261 */ 262 private static final int EVENT_PROXY_HAS_CHANGED = 16; 263 264 /** 265 * used internally when registering NetworkFactories 266 * obj = NetworkFactoryInfo 267 */ 268 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 269 270 /** 271 * used internally when registering NetworkAgents 272 * obj = Messenger 273 */ 274 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 275 276 /** 277 * used to add a network request 278 * includes a NetworkRequestInfo 279 */ 280 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 281 282 /** 283 * indicates a timeout period is over - check if we had a network yet or not 284 * and if not, call the timeout calback (but leave the request live until they 285 * cancel it. 286 * includes a NetworkRequestInfo 287 */ 288 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 289 290 /** 291 * used to add a network listener - no request 292 * includes a NetworkRequestInfo 293 */ 294 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 295 296 /** 297 * used to remove a network request, either a listener or a real request 298 * arg1 = UID of caller 299 * obj = NetworkRequest 300 */ 301 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 302 303 /** 304 * used internally when registering NetworkFactories 305 * obj = Messenger 306 */ 307 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 308 309 /** 310 * used internally to expire a wakelock when transitioning 311 * from one net to another. Expire happens when we fail to find 312 * a new network (typically after 1 minute) - 313 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 314 * a replacement network. 315 */ 316 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 317 318 /** 319 * Used internally to indicate the system is ready. 320 */ 321 private static final int EVENT_SYSTEM_READY = 25; 322 323 /** 324 * used to add a network request with a pending intent 325 * obj = NetworkRequestInfo 326 */ 327 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 328 329 /** 330 * used to remove a pending intent and its associated network request. 331 * arg1 = UID of caller 332 * obj = PendingIntent 333 */ 334 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 335 336 /** 337 * used to specify whether a network should be used even if unvalidated. 338 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 339 * arg2 = whether to remember this choice in the future (1 or 0) 340 * obj = network 341 */ 342 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 343 344 /** 345 * used to ask the user to confirm a connection to an unvalidated network. 346 * obj = network 347 */ 348 private static final int EVENT_PROMPT_UNVALIDATED = 29; 349 350 /** 351 * used internally to (re)configure mobile data always-on settings. 352 */ 353 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 354 355 /** 356 * used to add a network listener with a pending intent 357 * obj = NetworkRequestInfo 358 */ 359 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 360 361 /** Handler thread used for both of the handlers below. */ 362 @VisibleForTesting 363 protected final HandlerThread mHandlerThread; 364 /** Handler used for internal events. */ 365 final private InternalHandler mHandler; 366 /** Handler used for incoming {@link NetworkStateTracker} events. */ 367 final private NetworkStateTrackerHandler mTrackerHandler; 368 369 private boolean mSystemReady; 370 private Intent mInitialBroadcast; 371 372 private PowerManager.WakeLock mNetTransitionWakeLock; 373 private String mNetTransitionWakeLockCausedBy = ""; 374 private int mNetTransitionWakeLockSerialNumber; 375 private int mNetTransitionWakeLockTimeout; 376 private final PowerManager.WakeLock mPendingIntentWakeLock; 377 378 // used in DBG mode to track inet condition reports 379 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 380 private ArrayList mInetLog; 381 382 // track the current default http proxy - tell the world if we get a new one (real change) 383 private volatile ProxyInfo mDefaultProxy = null; 384 private Object mProxyLock = new Object(); 385 private boolean mDefaultProxyDisabled = false; 386 387 // track the global proxy. 388 private ProxyInfo mGlobalProxy = null; 389 390 private PacManager mPacManager = null; 391 392 final private SettingsObserver mSettingsObserver; 393 394 private UserManager mUserManager; 395 396 NetworkConfig[] mNetConfigs; 397 int mNetworksDefined; 398 399 // the set of network types that can only be enabled by system/sig apps 400 List mProtectedNetworks; 401 402 private DataConnectionStats mDataConnectionStats; 403 404 TelephonyManager mTelephonyManager; 405 406 private KeepaliveTracker mKeepaliveTracker; 407 408 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 409 private final static int MIN_NET_ID = 100; // some reserved marks 410 private final static int MAX_NET_ID = 65535; 411 private int mNextNetId = MIN_NET_ID; 412 413 // sequence number of NetworkRequests 414 private int mNextNetworkRequestId = 1; 415 416 // NetworkRequest activity String log entries. 417 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 418 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 419 420 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 421 private static final int MAX_VALIDATION_LOGS = 10; 422 private final ArrayDeque<Pair<Network,ReadOnlyLocalLog>> mValidationLogs = 423 new ArrayDeque<Pair<Network,ReadOnlyLocalLog>>(MAX_VALIDATION_LOGS); 424 425 private void addValidationLogs(ReadOnlyLocalLog log, Network network) { 426 synchronized(mValidationLogs) { 427 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 428 mValidationLogs.removeLast(); 429 } 430 mValidationLogs.addFirst(new Pair(network, log)); 431 } 432 } 433 434 /** 435 * Implements support for the legacy "one network per network type" model. 436 * 437 * We used to have a static array of NetworkStateTrackers, one for each 438 * network type, but that doesn't work any more now that we can have, 439 * for example, more that one wifi network. This class stores all the 440 * NetworkAgentInfo objects that support a given type, but the legacy 441 * API will only see the first one. 442 * 443 * It serves two main purposes: 444 * 445 * 1. Provide information about "the network for a given type" (since this 446 * API only supports one). 447 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 448 * the first network for a given type changes, or if the default network 449 * changes. 450 */ 451 private class LegacyTypeTracker { 452 453 private static final boolean DBG = true; 454 private static final boolean VDBG = false; 455 456 /** 457 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 458 * Each list holds references to all NetworkAgentInfos that are used to 459 * satisfy requests for that network type. 460 * 461 * This array is built out at startup such that an unsupported network 462 * doesn't get an ArrayList instance, making this a tristate: 463 * unsupported, supported but not active and active. 464 * 465 * The actual lists are populated when we scan the network types that 466 * are supported on this device. 467 */ 468 private ArrayList<NetworkAgentInfo> mTypeLists[]; 469 470 public LegacyTypeTracker() { 471 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 472 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 473 } 474 475 public void addSupportedType(int type) { 476 if (mTypeLists[type] != null) { 477 throw new IllegalStateException( 478 "legacy list for type " + type + "already initialized"); 479 } 480 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 481 } 482 483 public boolean isTypeSupported(int type) { 484 return isNetworkTypeValid(type) && mTypeLists[type] != null; 485 } 486 487 public NetworkAgentInfo getNetworkForType(int type) { 488 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 489 return mTypeLists[type].get(0); 490 } else { 491 return null; 492 } 493 } 494 495 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 496 boolean isDefaultNetwork) { 497 if (DBG) { 498 log("Sending " + state + 499 " broadcast for type " + type + " " + nai.name() + 500 " isDefaultNetwork=" + isDefaultNetwork); 501 } 502 } 503 504 /** Adds the given network to the specified legacy type list. */ 505 public void add(int type, NetworkAgentInfo nai) { 506 if (!isTypeSupported(type)) { 507 return; // Invalid network type. 508 } 509 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 510 511 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 512 if (list.contains(nai)) { 513 return; 514 } 515 516 list.add(nai); 517 518 // Send a broadcast if this is the first network of its type or if it's the default. 519 final boolean isDefaultNetwork = isDefaultNetwork(nai); 520 if (list.size() == 1 || isDefaultNetwork) { 521 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 522 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 523 } 524 } 525 526 /** Removes the given network from the specified legacy type list. */ 527 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 528 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 529 if (list == null || list.isEmpty()) { 530 return; 531 } 532 533 final boolean wasFirstNetwork = list.get(0).equals(nai); 534 535 if (!list.remove(nai)) { 536 return; 537 } 538 539 final DetailedState state = DetailedState.DISCONNECTED; 540 541 if (wasFirstNetwork || wasDefault) { 542 maybeLogBroadcast(nai, state, type, wasDefault); 543 sendLegacyNetworkBroadcast(nai, state, type); 544 } 545 546 if (!list.isEmpty() && wasFirstNetwork) { 547 if (DBG) log("Other network available for type " + type + 548 ", sending connected broadcast"); 549 final NetworkAgentInfo replacement = list.get(0); 550 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 551 sendLegacyNetworkBroadcast(replacement, state, type); 552 } 553 } 554 555 /** Removes the given network from all legacy type lists. */ 556 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 557 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 558 for (int type = 0; type < mTypeLists.length; type++) { 559 remove(type, nai, wasDefault); 560 } 561 } 562 563 // send out another legacy broadcast - currently only used for suspend/unsuspend 564 // toggle 565 public void update(NetworkAgentInfo nai) { 566 final boolean isDefault = isDefaultNetwork(nai); 567 final DetailedState state = nai.networkInfo.getDetailedState(); 568 for (int type = 0; type < mTypeLists.length; type++) { 569 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 570 final boolean contains = (list != null && list.contains(nai)); 571 final boolean isFirst = (list != null && list.size() > 0 && nai == list.get(0)); 572 if (isFirst || (contains && isDefault)) { 573 maybeLogBroadcast(nai, state, type, isDefault); 574 sendLegacyNetworkBroadcast(nai, state, type); 575 } 576 } 577 } 578 579 private String naiToString(NetworkAgentInfo nai) { 580 String name = (nai != null) ? nai.name() : "null"; 581 String state = (nai.networkInfo != null) ? 582 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 583 "???/???"; 584 return name + " " + state; 585 } 586 587 public void dump(IndentingPrintWriter pw) { 588 pw.println("mLegacyTypeTracker:"); 589 pw.increaseIndent(); 590 pw.print("Supported types:"); 591 for (int type = 0; type < mTypeLists.length; type++) { 592 if (mTypeLists[type] != null) pw.print(" " + type); 593 } 594 pw.println(); 595 pw.println("Current state:"); 596 pw.increaseIndent(); 597 for (int type = 0; type < mTypeLists.length; type++) { 598 if (mTypeLists[type] == null|| mTypeLists[type].size() == 0) continue; 599 for (NetworkAgentInfo nai : mTypeLists[type]) { 600 pw.println(type + " " + naiToString(nai)); 601 } 602 } 603 pw.decreaseIndent(); 604 pw.decreaseIndent(); 605 pw.println(); 606 } 607 } 608 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 609 610 @VisibleForTesting 611 protected HandlerThread createHandlerThread() { 612 return new HandlerThread("ConnectivityServiceThread"); 613 } 614 615 public ConnectivityService(Context context, INetworkManagementService netManager, 616 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 617 if (DBG) log("ConnectivityService starting up"); 618 619 mDefaultRequest = createInternetRequestForTransport(-1); 620 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, 621 new Binder(), NetworkRequestType.REQUEST); 622 mNetworkRequests.put(mDefaultRequest, defaultNRI); 623 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 624 625 mDefaultMobileDataRequest = createInternetRequestForTransport( 626 NetworkCapabilities.TRANSPORT_CELLULAR); 627 628 mHandlerThread = createHandlerThread(); 629 mHandlerThread.start(); 630 mHandler = new InternalHandler(mHandlerThread.getLooper()); 631 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 632 633 // setup our unique device name 634 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 635 String id = Settings.Secure.getString(context.getContentResolver(), 636 Settings.Secure.ANDROID_ID); 637 if (id != null && id.length() > 0) { 638 String name = new String("android-").concat(id); 639 SystemProperties.set("net.hostname", name); 640 } 641 } 642 643 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 644 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 645 646 mContext = checkNotNull(context, "missing Context"); 647 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 648 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 649 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 650 mKeyStore = KeyStore.getInstance(); 651 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 652 653 try { 654 mPolicyManager.registerListener(mPolicyListener); 655 } catch (RemoteException e) { 656 // ouch, no rules updates means some processes may never get network 657 loge("unable to register INetworkPolicyListener" + e.toString()); 658 } 659 660 final PowerManager powerManager = (PowerManager) context.getSystemService( 661 Context.POWER_SERVICE); 662 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 663 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 664 com.android.internal.R.integer.config_networkTransitionTimeout); 665 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 666 667 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 668 669 // TODO: What is the "correct" way to do determine if this is a wifi only device? 670 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 671 log("wifiOnly=" + wifiOnly); 672 String[] naStrings = context.getResources().getStringArray( 673 com.android.internal.R.array.networkAttributes); 674 for (String naString : naStrings) { 675 try { 676 NetworkConfig n = new NetworkConfig(naString); 677 if (VDBG) log("naString=" + naString + " config=" + n); 678 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 679 loge("Error in networkAttributes - ignoring attempt to define type " + 680 n.type); 681 continue; 682 } 683 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 684 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 685 n.type); 686 continue; 687 } 688 if (mNetConfigs[n.type] != null) { 689 loge("Error in networkAttributes - ignoring attempt to redefine type " + 690 n.type); 691 continue; 692 } 693 mLegacyTypeTracker.addSupportedType(n.type); 694 695 mNetConfigs[n.type] = n; 696 mNetworksDefined++; 697 } catch(Exception e) { 698 // ignore it - leave the entry null 699 } 700 } 701 702 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 703 if (mNetConfigs[TYPE_VPN] == null) { 704 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 705 // don't need to add TYPE_VPN to mNetConfigs. 706 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 707 mNetworksDefined++; // used only in the log() statement below. 708 } 709 710 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 711 712 mProtectedNetworks = new ArrayList<Integer>(); 713 int[] protectedNetworks = context.getResources().getIntArray( 714 com.android.internal.R.array.config_protectedNetworks); 715 for (int p : protectedNetworks) { 716 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 717 mProtectedNetworks.add(p); 718 } else { 719 if (DBG) loge("Ignoring protectedNetwork " + p); 720 } 721 } 722 723 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 724 && SystemProperties.get("ro.build.type").equals("eng"); 725 726 mTethering = new Tethering(mContext, mNetd, statsService); 727 728 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 729 730 //set up the listener for user state for creating user VPNs 731 IntentFilter intentFilter = new IntentFilter(); 732 intentFilter.addAction(Intent.ACTION_USER_STARTING); 733 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 734 intentFilter.addAction(Intent.ACTION_USER_ADDED); 735 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 736 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 737 mContext.registerReceiverAsUser( 738 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 739 740 try { 741 mNetd.registerObserver(mTethering); 742 mNetd.registerObserver(mDataActivityObserver); 743 } catch (RemoteException e) { 744 loge("Error registering observer :" + e); 745 } 746 747 if (DBG) { 748 mInetLog = new ArrayList(); 749 } 750 751 mSettingsObserver = new SettingsObserver(mContext, mHandler); 752 registerSettingsCallbacks(); 753 754 mDataConnectionStats = new DataConnectionStats(mContext); 755 mDataConnectionStats.startMonitoring(); 756 757 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 758 759 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 760 761 mKeepaliveTracker = new KeepaliveTracker(mHandler); 762 } 763 764 private NetworkRequest createInternetRequestForTransport(int transportType) { 765 NetworkCapabilities netCap = new NetworkCapabilities(); 766 netCap.addCapability(NET_CAPABILITY_INTERNET); 767 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 768 if (transportType > -1) { 769 netCap.addTransportType(transportType); 770 } 771 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 772 } 773 774 private void handleMobileDataAlwaysOn() { 775 final boolean enable = (Settings.Global.getInt( 776 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 777 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 778 if (enable == isEnabled) { 779 return; // Nothing to do. 780 } 781 782 if (enable) { 783 handleRegisterNetworkRequest(new NetworkRequestInfo( 784 null, mDefaultMobileDataRequest, new Binder(), NetworkRequestType.REQUEST)); 785 } else { 786 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 787 } 788 } 789 790 private void registerSettingsCallbacks() { 791 // Watch for global HTTP proxy changes. 792 mSettingsObserver.observe( 793 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 794 EVENT_APPLY_GLOBAL_HTTP_PROXY); 795 796 // Watch for whether or not to keep mobile data always on. 797 mSettingsObserver.observe( 798 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 799 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 800 } 801 802 private synchronized int nextNetworkRequestId() { 803 return mNextNetworkRequestId++; 804 } 805 806 @VisibleForTesting 807 protected int reserveNetId() { 808 synchronized (mNetworkForNetId) { 809 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 810 int netId = mNextNetId; 811 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 812 // Make sure NetID unused. http://b/16815182 813 if (!mNetIdInUse.get(netId)) { 814 mNetIdInUse.put(netId, true); 815 return netId; 816 } 817 } 818 } 819 throw new IllegalStateException("No free netIds"); 820 } 821 822 private NetworkState getFilteredNetworkState(int networkType, int uid) { 823 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 824 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 825 final NetworkState state; 826 if (nai != null) { 827 state = nai.getNetworkState(); 828 state.networkInfo.setType(networkType); 829 } else { 830 final NetworkInfo info = new NetworkInfo(networkType, 0, 831 getNetworkTypeName(networkType), ""); 832 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 833 info.setIsAvailable(true); 834 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 835 null, null, null); 836 } 837 filterNetworkStateForUid(state, uid); 838 return state; 839 } else { 840 return NetworkState.EMPTY; 841 } 842 } 843 844 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 845 if (network == null) { 846 return null; 847 } 848 synchronized (mNetworkForNetId) { 849 return mNetworkForNetId.get(network.netId); 850 } 851 } 852 853 private Network[] getVpnUnderlyingNetworks(int uid) { 854 if (!mLockdownEnabled) { 855 int user = UserHandle.getUserId(uid); 856 synchronized (mVpns) { 857 Vpn vpn = mVpns.get(user); 858 if (vpn != null && vpn.appliesToUid(uid)) { 859 return vpn.getUnderlyingNetworks(); 860 } 861 } 862 } 863 return null; 864 } 865 866 private NetworkState getUnfilteredActiveNetworkState(int uid) { 867 NetworkAgentInfo nai = getDefaultNetwork(); 868 869 final Network[] networks = getVpnUnderlyingNetworks(uid); 870 if (networks != null) { 871 // getUnderlyingNetworks() returns: 872 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 873 // empty array => the VPN explicitly said "no default network". 874 // non-empty array => the VPN specified one or more default networks; we use the 875 // first one. 876 if (networks.length > 0) { 877 nai = getNetworkAgentInfoForNetwork(networks[0]); 878 } else { 879 nai = null; 880 } 881 } 882 883 if (nai != null) { 884 return nai.getNetworkState(); 885 } else { 886 return NetworkState.EMPTY; 887 } 888 } 889 890 /** 891 * Check if UID should be blocked from using the network with the given LinkProperties. 892 */ 893 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 894 final boolean networkCostly; 895 final int uidRules; 896 897 final String iface = (lp == null ? "" : lp.getInterfaceName()); 898 synchronized (mRulesLock) { 899 networkCostly = mMeteredIfaces.contains(iface); 900 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 901 } 902 903 if (uidRules == RULE_REJECT_ALL) { 904 return true; 905 } else if ((uidRules == RULE_REJECT_METERED) && networkCostly) { 906 return true; 907 } else { 908 return false; 909 } 910 } 911 912 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 913 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) return; 914 boolean removed = false; 915 boolean added = false; 916 synchronized (mBlockedAppUids) { 917 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 918 added = true; 919 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 920 removed = true; 921 } 922 } 923 if (added) log("Returning blocked NetworkInfo to uid=" + uid); 924 else if (removed) log("Returning unblocked NetworkInfo to uid=" + uid); 925 } 926 927 /** 928 * Apply any relevant filters to {@link NetworkState} for the given UID. For 929 * example, this may mark the network as {@link DetailedState#BLOCKED} based 930 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 931 * {@link NetworkInfo#isMetered()} based on network policies. 932 */ 933 private void filterNetworkStateForUid(NetworkState state, int uid) { 934 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 935 936 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 937 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 938 } 939 if (mLockdownTracker != null) { 940 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 941 } 942 943 // TODO: apply metered state closer to NetworkAgentInfo 944 final long token = Binder.clearCallingIdentity(); 945 try { 946 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 947 } catch (RemoteException e) { 948 } finally { 949 Binder.restoreCallingIdentity(token); 950 } 951 } 952 953 /** 954 * Return NetworkInfo for the active (i.e., connected) network interface. 955 * It is assumed that at most one network is active at a time. If more 956 * than one is active, it is indeterminate which will be returned. 957 * @return the info for the active network, or {@code null} if none is 958 * active 959 */ 960 @Override 961 public NetworkInfo getActiveNetworkInfo() { 962 enforceAccessPermission(); 963 final int uid = Binder.getCallingUid(); 964 final NetworkState state = getUnfilteredActiveNetworkState(uid); 965 filterNetworkStateForUid(state, uid); 966 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 967 return state.networkInfo; 968 } 969 970 @Override 971 public Network getActiveNetwork() { 972 enforceAccessPermission(); 973 return getActiveNetworkForUidInternal(Binder.getCallingUid()); 974 } 975 976 @Override 977 public Network getActiveNetworkForUid(int uid) { 978 enforceConnectivityInternalPermission(); 979 return getActiveNetworkForUidInternal(uid); 980 } 981 982 private Network getActiveNetworkForUidInternal(final int uid) { 983 final int user = UserHandle.getUserId(uid); 984 int vpnNetId = NETID_UNSET; 985 synchronized (mVpns) { 986 final Vpn vpn = mVpns.get(user); 987 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 988 } 989 NetworkAgentInfo nai; 990 if (vpnNetId != NETID_UNSET) { 991 synchronized (mNetworkForNetId) { 992 nai = mNetworkForNetId.get(vpnNetId); 993 } 994 if (nai != null) return nai.network; 995 } 996 nai = getDefaultNetwork(); 997 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 998 return nai != null ? nai.network : null; 999 } 1000 1001 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1002 enforceAccessPermission(); 1003 final int uid = Binder.getCallingUid(); 1004 NetworkState state = getUnfilteredActiveNetworkState(uid); 1005 return state.networkInfo; 1006 } 1007 1008 @Override 1009 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 1010 enforceConnectivityInternalPermission(); 1011 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1012 filterNetworkStateForUid(state, uid); 1013 return state.networkInfo; 1014 } 1015 1016 @Override 1017 public NetworkInfo getNetworkInfo(int networkType) { 1018 enforceAccessPermission(); 1019 final int uid = Binder.getCallingUid(); 1020 if (getVpnUnderlyingNetworks(uid) != null) { 1021 // A VPN is active, so we may need to return one of its underlying networks. This 1022 // information is not available in LegacyTypeTracker, so we have to get it from 1023 // getUnfilteredActiveNetworkState. 1024 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1025 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1026 filterNetworkStateForUid(state, uid); 1027 return state.networkInfo; 1028 } 1029 } 1030 final NetworkState state = getFilteredNetworkState(networkType, uid); 1031 return state.networkInfo; 1032 } 1033 1034 @Override 1035 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1036 enforceAccessPermission(); 1037 final int uid = Binder.getCallingUid(); 1038 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1039 if (nai != null) { 1040 final NetworkState state = nai.getNetworkState(); 1041 filterNetworkStateForUid(state, uid); 1042 return state.networkInfo; 1043 } else { 1044 return null; 1045 } 1046 } 1047 1048 @Override 1049 public NetworkInfo[] getAllNetworkInfo() { 1050 enforceAccessPermission(); 1051 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1052 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1053 networkType++) { 1054 NetworkInfo info = getNetworkInfo(networkType); 1055 if (info != null) { 1056 result.add(info); 1057 } 1058 } 1059 return result.toArray(new NetworkInfo[result.size()]); 1060 } 1061 1062 @Override 1063 public Network getNetworkForType(int networkType) { 1064 enforceAccessPermission(); 1065 final int uid = Binder.getCallingUid(); 1066 NetworkState state = getFilteredNetworkState(networkType, uid); 1067 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1068 return state.network; 1069 } 1070 return null; 1071 } 1072 1073 @Override 1074 public Network[] getAllNetworks() { 1075 enforceAccessPermission(); 1076 synchronized (mNetworkForNetId) { 1077 final Network[] result = new Network[mNetworkForNetId.size()]; 1078 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1079 result[i] = mNetworkForNetId.valueAt(i).network; 1080 } 1081 return result; 1082 } 1083 } 1084 1085 @Override 1086 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1087 // The basic principle is: if an app's traffic could possibly go over a 1088 // network, without the app doing anything multinetwork-specific, 1089 // (hence, by "default"), then include that network's capabilities in 1090 // the array. 1091 // 1092 // In the normal case, app traffic only goes over the system's default 1093 // network connection, so that's the only network returned. 1094 // 1095 // With a VPN in force, some app traffic may go into the VPN, and thus 1096 // over whatever underlying networks the VPN specifies, while other app 1097 // traffic may go over the system default network (e.g.: a split-tunnel 1098 // VPN, or an app disallowed by the VPN), so the set of networks 1099 // returned includes the VPN's underlying networks and the system 1100 // default. 1101 enforceAccessPermission(); 1102 1103 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1104 1105 NetworkAgentInfo nai = getDefaultNetwork(); 1106 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1107 if (nc != null) { 1108 result.put(nai.network, nc); 1109 } 1110 1111 if (!mLockdownEnabled) { 1112 synchronized (mVpns) { 1113 Vpn vpn = mVpns.get(userId); 1114 if (vpn != null) { 1115 Network[] networks = vpn.getUnderlyingNetworks(); 1116 if (networks != null) { 1117 for (Network network : networks) { 1118 nai = getNetworkAgentInfoForNetwork(network); 1119 nc = getNetworkCapabilitiesInternal(nai); 1120 if (nc != null) { 1121 result.put(network, nc); 1122 } 1123 } 1124 } 1125 } 1126 } 1127 } 1128 1129 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1130 out = result.values().toArray(out); 1131 return out; 1132 } 1133 1134 @Override 1135 public boolean isNetworkSupported(int networkType) { 1136 enforceAccessPermission(); 1137 return mLegacyTypeTracker.isTypeSupported(networkType); 1138 } 1139 1140 /** 1141 * Return LinkProperties for the active (i.e., connected) default 1142 * network interface. It is assumed that at most one default network 1143 * is active at a time. If more than one is active, it is indeterminate 1144 * which will be returned. 1145 * @return the ip properties for the active network, or {@code null} if 1146 * none is active 1147 */ 1148 @Override 1149 public LinkProperties getActiveLinkProperties() { 1150 enforceAccessPermission(); 1151 final int uid = Binder.getCallingUid(); 1152 NetworkState state = getUnfilteredActiveNetworkState(uid); 1153 return state.linkProperties; 1154 } 1155 1156 @Override 1157 public LinkProperties getLinkPropertiesForType(int networkType) { 1158 enforceAccessPermission(); 1159 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1160 if (nai != null) { 1161 synchronized (nai) { 1162 return new LinkProperties(nai.linkProperties); 1163 } 1164 } 1165 return null; 1166 } 1167 1168 // TODO - this should be ALL networks 1169 @Override 1170 public LinkProperties getLinkProperties(Network network) { 1171 enforceAccessPermission(); 1172 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1173 if (nai != null) { 1174 synchronized (nai) { 1175 return new LinkProperties(nai.linkProperties); 1176 } 1177 } 1178 return null; 1179 } 1180 1181 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1182 if (nai != null) { 1183 synchronized (nai) { 1184 if (nai.networkCapabilities != null) { 1185 return new NetworkCapabilities(nai.networkCapabilities); 1186 } 1187 } 1188 } 1189 return null; 1190 } 1191 1192 @Override 1193 public NetworkCapabilities getNetworkCapabilities(Network network) { 1194 enforceAccessPermission(); 1195 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1196 } 1197 1198 @Override 1199 public NetworkState[] getAllNetworkState() { 1200 // Require internal since we're handing out IMSI details 1201 enforceConnectivityInternalPermission(); 1202 1203 final ArrayList<NetworkState> result = Lists.newArrayList(); 1204 for (Network network : getAllNetworks()) { 1205 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1206 if (nai != null) { 1207 result.add(nai.getNetworkState()); 1208 } 1209 } 1210 return result.toArray(new NetworkState[result.size()]); 1211 } 1212 1213 @Override 1214 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1215 enforceAccessPermission(); 1216 final int uid = Binder.getCallingUid(); 1217 final long token = Binder.clearCallingIdentity(); 1218 try { 1219 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1220 if (state.networkInfo != null) { 1221 try { 1222 return mPolicyManager.getNetworkQuotaInfo(state); 1223 } catch (RemoteException e) { 1224 } 1225 } 1226 return null; 1227 } finally { 1228 Binder.restoreCallingIdentity(token); 1229 } 1230 } 1231 1232 @Override 1233 public boolean isActiveNetworkMetered() { 1234 enforceAccessPermission(); 1235 1236 final NetworkInfo info = getActiveNetworkInfo(); 1237 return (info != null) ? info.isMetered() : false; 1238 } 1239 1240 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1241 @Override 1242 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1243 int deviceType = Integer.parseInt(label); 1244 sendDataActivityBroadcast(deviceType, active, tsNanos); 1245 } 1246 }; 1247 1248 /** 1249 * Ensure that a network route exists to deliver traffic to the specified 1250 * host via the specified network interface. 1251 * @param networkType the type of the network over which traffic to the 1252 * specified host is to be routed 1253 * @param hostAddress the IP address of the host to which the route is 1254 * desired 1255 * @return {@code true} on success, {@code false} on failure 1256 */ 1257 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1258 enforceChangePermission(); 1259 if (mProtectedNetworks.contains(networkType)) { 1260 enforceConnectivityInternalPermission(); 1261 } 1262 1263 InetAddress addr; 1264 try { 1265 addr = InetAddress.getByAddress(hostAddress); 1266 } catch (UnknownHostException e) { 1267 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1268 return false; 1269 } 1270 1271 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1272 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1273 return false; 1274 } 1275 1276 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1277 if (nai == null) { 1278 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1279 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1280 } else { 1281 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1282 } 1283 return false; 1284 } 1285 1286 DetailedState netState; 1287 synchronized (nai) { 1288 netState = nai.networkInfo.getDetailedState(); 1289 } 1290 1291 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1292 if (VDBG) { 1293 log("requestRouteToHostAddress on down network " 1294 + "(" + networkType + ") - dropped" 1295 + " netState=" + netState); 1296 } 1297 return false; 1298 } 1299 1300 final int uid = Binder.getCallingUid(); 1301 final long token = Binder.clearCallingIdentity(); 1302 try { 1303 LinkProperties lp; 1304 int netId; 1305 synchronized (nai) { 1306 lp = nai.linkProperties; 1307 netId = nai.network.netId; 1308 } 1309 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1310 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1311 return ok; 1312 } finally { 1313 Binder.restoreCallingIdentity(token); 1314 } 1315 } 1316 1317 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1318 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1319 if (bestRoute == null) { 1320 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1321 } else { 1322 String iface = bestRoute.getInterface(); 1323 if (bestRoute.getGateway().equals(addr)) { 1324 // if there is no better route, add the implied hostroute for our gateway 1325 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1326 } else { 1327 // if we will connect to this through another route, add a direct route 1328 // to it's gateway 1329 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1330 } 1331 } 1332 if (DBG) log("Adding legacy route " + bestRoute + 1333 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1334 try { 1335 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1336 } catch (Exception e) { 1337 // never crash - catch them all 1338 if (DBG) loge("Exception trying to add a route: " + e); 1339 return false; 1340 } 1341 return true; 1342 } 1343 1344 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1345 @Override 1346 public void onUidRulesChanged(int uid, int uidRules) { 1347 // caller is NPMS, since we only register with them 1348 if (LOGD_RULES) { 1349 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1350 } 1351 1352 synchronized (mRulesLock) { 1353 // skip update when we've already applied rules 1354 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1355 if (oldRules == uidRules) return; 1356 1357 mUidRules.put(uid, uidRules); 1358 } 1359 1360 // TODO: notify UID when it has requested targeted updates 1361 } 1362 1363 @Override 1364 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1365 // caller is NPMS, since we only register with them 1366 if (LOGD_RULES) { 1367 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1368 } 1369 1370 synchronized (mRulesLock) { 1371 mMeteredIfaces.clear(); 1372 for (String iface : meteredIfaces) { 1373 mMeteredIfaces.add(iface); 1374 } 1375 } 1376 } 1377 1378 @Override 1379 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1380 // caller is NPMS, since we only register with them 1381 if (LOGD_RULES) { 1382 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1383 } 1384 if (restrictBackground) { 1385 log("onRestrictBackgroundChanged(true): disabling tethering"); 1386 mTethering.untetherAll(); 1387 } 1388 } 1389 1390 @Override 1391 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1392 if (LOGD_RULES) { 1393 // caller is NPMS, since we only register with them 1394 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1395 + whitelisted + ")"); 1396 } 1397 } 1398 }; 1399 1400 /** 1401 * Require that the caller is either in the same user or has appropriate permission to interact 1402 * across users. 1403 * 1404 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1405 */ 1406 private void enforceCrossUserPermission(int userId) { 1407 if (userId == UserHandle.getCallingUserId()) { 1408 // Not a cross-user call. 1409 return; 1410 } 1411 mContext.enforceCallingOrSelfPermission( 1412 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1413 "ConnectivityService"); 1414 } 1415 1416 private void enforceInternetPermission() { 1417 mContext.enforceCallingOrSelfPermission( 1418 android.Manifest.permission.INTERNET, 1419 "ConnectivityService"); 1420 } 1421 1422 private void enforceAccessPermission() { 1423 mContext.enforceCallingOrSelfPermission( 1424 android.Manifest.permission.ACCESS_NETWORK_STATE, 1425 "ConnectivityService"); 1426 } 1427 1428 private void enforceChangePermission() { 1429 ConnectivityManager.enforceChangePermission(mContext); 1430 } 1431 1432 private void enforceTetherAccessPermission() { 1433 mContext.enforceCallingOrSelfPermission( 1434 android.Manifest.permission.ACCESS_NETWORK_STATE, 1435 "ConnectivityService"); 1436 } 1437 1438 private void enforceConnectivityInternalPermission() { 1439 mContext.enforceCallingOrSelfPermission( 1440 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1441 "ConnectivityService"); 1442 } 1443 1444 private void enforceKeepalivePermission() { 1445 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1446 } 1447 1448 public void sendConnectedBroadcast(NetworkInfo info) { 1449 enforceConnectivityInternalPermission(); 1450 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1451 } 1452 1453 private void sendInetConditionBroadcast(NetworkInfo info) { 1454 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1455 } 1456 1457 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1458 if (mLockdownTracker != null) { 1459 info = new NetworkInfo(info); 1460 mLockdownTracker.augmentNetworkInfo(info); 1461 } 1462 1463 Intent intent = new Intent(bcastType); 1464 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1465 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1466 if (info.isFailover()) { 1467 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1468 info.setFailover(false); 1469 } 1470 if (info.getReason() != null) { 1471 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1472 } 1473 if (info.getExtraInfo() != null) { 1474 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1475 info.getExtraInfo()); 1476 } 1477 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1478 return intent; 1479 } 1480 1481 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1482 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1483 } 1484 1485 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1486 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1487 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1488 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1489 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1490 final long ident = Binder.clearCallingIdentity(); 1491 try { 1492 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1493 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1494 } finally { 1495 Binder.restoreCallingIdentity(ident); 1496 } 1497 } 1498 1499 private void sendStickyBroadcast(Intent intent) { 1500 synchronized(this) { 1501 if (!mSystemReady) { 1502 mInitialBroadcast = new Intent(intent); 1503 } 1504 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1505 if (VDBG) { 1506 log("sendStickyBroadcast: action=" + intent.getAction()); 1507 } 1508 1509 Bundle options = null; 1510 final long ident = Binder.clearCallingIdentity(); 1511 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1512 final NetworkInfo ni = intent.getParcelableExtra( 1513 ConnectivityManager.EXTRA_NETWORK_INFO); 1514 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1515 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1516 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1517 } else { 1518 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1519 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1520 options = opts.toBundle(); 1521 } 1522 final IBatteryStats bs = BatteryStatsService.getService(); 1523 try { 1524 bs.noteConnectivityChanged(intent.getIntExtra( 1525 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1526 ni != null ? ni.getState().toString() : "?"); 1527 } catch (RemoteException e) { 1528 } 1529 } 1530 try { 1531 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1532 } finally { 1533 Binder.restoreCallingIdentity(ident); 1534 } 1535 } 1536 } 1537 1538 void systemReady() { 1539 loadGlobalProxy(); 1540 1541 synchronized(this) { 1542 mSystemReady = true; 1543 if (mInitialBroadcast != null) { 1544 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1545 mInitialBroadcast = null; 1546 } 1547 } 1548 // load the global proxy at startup 1549 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1550 1551 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1552 // for user to unlock device too. 1553 updateLockdownVpn(); 1554 1555 // Configure whether mobile data is always on. 1556 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1557 1558 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1559 1560 mPermissionMonitor.startMonitoring(); 1561 } 1562 1563 /** 1564 * Setup data activity tracking for the given network. 1565 * 1566 * Every {@code setupDataActivityTracking} should be paired with a 1567 * {@link #removeDataActivityTracking} for cleanup. 1568 */ 1569 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1570 final String iface = networkAgent.linkProperties.getInterfaceName(); 1571 1572 final int timeout; 1573 int type = ConnectivityManager.TYPE_NONE; 1574 1575 if (networkAgent.networkCapabilities.hasTransport( 1576 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1577 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1578 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1579 10); 1580 type = ConnectivityManager.TYPE_MOBILE; 1581 } else if (networkAgent.networkCapabilities.hasTransport( 1582 NetworkCapabilities.TRANSPORT_WIFI)) { 1583 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1584 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1585 15); 1586 type = ConnectivityManager.TYPE_WIFI; 1587 } else { 1588 // do not track any other networks 1589 timeout = 0; 1590 } 1591 1592 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1593 try { 1594 mNetd.addIdleTimer(iface, timeout, type); 1595 } catch (Exception e) { 1596 // You shall not crash! 1597 loge("Exception in setupDataActivityTracking " + e); 1598 } 1599 } 1600 } 1601 1602 /** 1603 * Remove data activity tracking when network disconnects. 1604 */ 1605 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1606 final String iface = networkAgent.linkProperties.getInterfaceName(); 1607 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1608 1609 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1610 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1611 try { 1612 // the call fails silently if no idletimer setup for this interface 1613 mNetd.removeIdleTimer(iface); 1614 } catch (Exception e) { 1615 loge("Exception in removeDataActivityTracking " + e); 1616 } 1617 } 1618 } 1619 1620 /** 1621 * Reads the network specific MTU size from reources. 1622 * and set it on it's iface. 1623 */ 1624 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1625 final String iface = newLp.getInterfaceName(); 1626 final int mtu = newLp.getMtu(); 1627 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1628 if (VDBG) log("identical MTU - not setting"); 1629 return; 1630 } 1631 1632 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1633 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1634 return; 1635 } 1636 1637 // Cannot set MTU without interface name 1638 if (TextUtils.isEmpty(iface)) { 1639 loge("Setting MTU size with null iface."); 1640 return; 1641 } 1642 1643 try { 1644 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1645 mNetd.setMtu(iface, mtu); 1646 } catch (Exception e) { 1647 Slog.e(TAG, "exception in setMtu()" + e); 1648 } 1649 } 1650 1651 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1652 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1653 1654 // Overridden for testing purposes to avoid writing to SystemProperties. 1655 @VisibleForTesting 1656 protected int getDefaultTcpRwnd() { 1657 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1658 } 1659 1660 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1661 if (isDefaultNetwork(nai) == false) { 1662 return; 1663 } 1664 1665 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1666 String[] values = null; 1667 if (tcpBufferSizes != null) { 1668 values = tcpBufferSizes.split(","); 1669 } 1670 1671 if (values == null || values.length != 6) { 1672 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1673 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1674 values = tcpBufferSizes.split(","); 1675 } 1676 1677 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1678 1679 try { 1680 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1681 1682 final String prefix = "/sys/kernel/ipv4/tcp_"; 1683 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1684 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1685 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1686 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1687 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1688 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1689 mCurrentTcpBufferSizes = tcpBufferSizes; 1690 } catch (IOException e) { 1691 loge("Can't set TCP buffer sizes:" + e); 1692 } 1693 1694 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1695 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1696 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1697 if (rwndValue != 0) { 1698 SystemProperties.set(sysctlKey, rwndValue.toString()); 1699 } 1700 } 1701 1702 private void flushVmDnsCache() { 1703 /* 1704 * Tell the VMs to toss their DNS caches 1705 */ 1706 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1707 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1708 /* 1709 * Connectivity events can happen before boot has completed ... 1710 */ 1711 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1712 final long ident = Binder.clearCallingIdentity(); 1713 try { 1714 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1715 } finally { 1716 Binder.restoreCallingIdentity(ident); 1717 } 1718 } 1719 1720 @Override 1721 public int getRestoreDefaultNetworkDelay(int networkType) { 1722 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1723 NETWORK_RESTORE_DELAY_PROP_NAME); 1724 if(restoreDefaultNetworkDelayStr != null && 1725 restoreDefaultNetworkDelayStr.length() != 0) { 1726 try { 1727 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1728 } catch (NumberFormatException e) { 1729 } 1730 } 1731 // if the system property isn't set, use the value for the apn type 1732 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1733 1734 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1735 (mNetConfigs[networkType] != null)) { 1736 ret = mNetConfigs[networkType].restoreTime; 1737 } 1738 return ret; 1739 } 1740 1741 private boolean argsContain(String[] args, String target) { 1742 for (String arg : args) { 1743 if (arg.equals(target)) return true; 1744 } 1745 return false; 1746 } 1747 1748 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1749 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1750 final long DIAG_TIME_MS = 5000; 1751 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1752 // Start gathering diagnostic information. 1753 netDiags.add(new NetworkDiagnostics( 1754 nai.network, 1755 new LinkProperties(nai.linkProperties), // Must be a copy. 1756 DIAG_TIME_MS)); 1757 } 1758 1759 for (NetworkDiagnostics netDiag : netDiags) { 1760 pw.println(); 1761 netDiag.waitForMeasurements(); 1762 netDiag.dump(pw); 1763 } 1764 } 1765 1766 @Override 1767 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1768 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1769 if (mContext.checkCallingOrSelfPermission( 1770 android.Manifest.permission.DUMP) 1771 != PackageManager.PERMISSION_GRANTED) { 1772 pw.println("Permission Denial: can't dump ConnectivityService " + 1773 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1774 Binder.getCallingUid()); 1775 return; 1776 } 1777 1778 if (argsContain(args, "--diag")) { 1779 dumpNetworkDiagnostics(pw); 1780 return; 1781 } 1782 1783 pw.print("NetworkFactories for:"); 1784 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1785 pw.print(" " + nfi.name); 1786 } 1787 pw.println(); 1788 pw.println(); 1789 1790 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1791 pw.print("Active default network: "); 1792 if (defaultNai == null) { 1793 pw.println("none"); 1794 } else { 1795 pw.println(defaultNai.network.netId); 1796 } 1797 pw.println(); 1798 1799 pw.println("Current Networks:"); 1800 pw.increaseIndent(); 1801 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1802 pw.println(nai.toString()); 1803 pw.increaseIndent(); 1804 pw.println("Requests:"); 1805 pw.increaseIndent(); 1806 for (int i = 0; i < nai.networkRequests.size(); i++) { 1807 pw.println(nai.networkRequests.valueAt(i).toString()); 1808 } 1809 pw.decreaseIndent(); 1810 pw.println("Lingered:"); 1811 pw.increaseIndent(); 1812 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1813 pw.decreaseIndent(); 1814 pw.decreaseIndent(); 1815 } 1816 pw.decreaseIndent(); 1817 pw.println(); 1818 1819 pw.println("Metered Interfaces:"); 1820 pw.increaseIndent(); 1821 for (String value : mMeteredIfaces) { 1822 pw.println(value); 1823 } 1824 pw.decreaseIndent(); 1825 pw.println(); 1826 1827 pw.println("Network Requests:"); 1828 pw.increaseIndent(); 1829 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1830 pw.println(nri.toString()); 1831 } 1832 pw.println(); 1833 pw.decreaseIndent(); 1834 1835 mLegacyTypeTracker.dump(pw); 1836 1837 synchronized (this) { 1838 pw.print("mNetTransitionWakeLock: currently " + 1839 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1840 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1841 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1842 } else { 1843 pw.println(", last requested never"); 1844 } 1845 } 1846 1847 pw.println(); 1848 mTethering.dump(fd, pw, args); 1849 1850 pw.println(); 1851 mKeepaliveTracker.dump(pw); 1852 1853 pw.println(); 1854 1855 if (mInetLog != null && mInetLog.size() > 0) { 1856 pw.println(); 1857 pw.println("Inet condition reports:"); 1858 pw.increaseIndent(); 1859 for(int i = 0; i < mInetLog.size(); i++) { 1860 pw.println(mInetLog.get(i)); 1861 } 1862 pw.decreaseIndent(); 1863 } 1864 1865 if (argsContain(args, "--short") == false) { 1866 pw.println(); 1867 synchronized (mValidationLogs) { 1868 pw.println("mValidationLogs (most recent first):"); 1869 for (Pair<Network,ReadOnlyLocalLog> p : mValidationLogs) { 1870 pw.println(p.first); 1871 pw.increaseIndent(); 1872 p.second.dump(fd, pw, args); 1873 pw.decreaseIndent(); 1874 } 1875 } 1876 1877 pw.println(); 1878 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1879 pw.increaseIndent(); 1880 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1881 pw.decreaseIndent(); 1882 } 1883 } 1884 1885 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 1886 if (nai.network == null) return false; 1887 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1888 if (officialNai != null && officialNai.equals(nai)) return true; 1889 if (officialNai != null || VDBG) { 1890 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 1891 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1892 " - " + nai); 1893 } 1894 return false; 1895 } 1896 1897 private boolean isRequest(NetworkRequest request) { 1898 return mNetworkRequests.get(request).isRequest(); 1899 } 1900 1901 // must be stateless - things change under us. 1902 private class NetworkStateTrackerHandler extends Handler { 1903 public NetworkStateTrackerHandler(Looper looper) { 1904 super(looper); 1905 } 1906 1907 private boolean maybeHandleAsyncChannelMessage(Message msg) { 1908 switch (msg.what) { 1909 default: 1910 return false; 1911 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1912 handleAsyncChannelHalfConnect(msg); 1913 break; 1914 } 1915 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1916 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1917 if (nai != null) nai.asyncChannel.disconnect(); 1918 break; 1919 } 1920 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1921 handleAsyncChannelDisconnected(msg); 1922 break; 1923 } 1924 } 1925 return true; 1926 } 1927 1928 private void maybeHandleNetworkAgentMessage(Message msg) { 1929 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1930 if (nai == null) { 1931 if (VDBG) { 1932 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 1933 log(String.format("%s from unknown NetworkAgent", what)); 1934 } 1935 return; 1936 } 1937 1938 switch (msg.what) { 1939 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1940 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 1941 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 1942 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 1943 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 1944 } 1945 if (nai.created && !nai.networkCapabilities.equalImmutableCapabilities( 1946 networkCapabilities)) { 1947 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 1948 + nai.networkCapabilities + " -> " + networkCapabilities); 1949 } 1950 updateCapabilities(nai, networkCapabilities); 1951 break; 1952 } 1953 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1954 if (VDBG) { 1955 log("Update of LinkProperties for " + nai.name() + 1956 "; created=" + nai.created); 1957 } 1958 LinkProperties oldLp = nai.linkProperties; 1959 synchronized (nai) { 1960 nai.linkProperties = (LinkProperties)msg.obj; 1961 } 1962 if (nai.created) updateLinkProperties(nai, oldLp); 1963 break; 1964 } 1965 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1966 NetworkInfo info = (NetworkInfo) msg.obj; 1967 updateNetworkInfo(nai, info); 1968 break; 1969 } 1970 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1971 Integer score = (Integer) msg.obj; 1972 if (score != null) updateNetworkScore(nai, score.intValue()); 1973 break; 1974 } 1975 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 1976 try { 1977 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1978 } catch (Exception e) { 1979 // Never crash! 1980 loge("Exception in addVpnUidRanges: " + e); 1981 } 1982 break; 1983 } 1984 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 1985 try { 1986 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1987 } catch (Exception e) { 1988 // Never crash! 1989 loge("Exception in removeVpnUidRanges: " + e); 1990 } 1991 break; 1992 } 1993 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 1994 if (nai.created && !nai.networkMisc.explicitlySelected) { 1995 loge("ERROR: created network explicitly selected."); 1996 } 1997 nai.networkMisc.explicitlySelected = true; 1998 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 1999 break; 2000 } 2001 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2002 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2003 break; 2004 } 2005 } 2006 } 2007 2008 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2009 switch (msg.what) { 2010 default: 2011 return false; 2012 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2013 final NetworkAgentInfo nai; 2014 synchronized (mNetworkForNetId) { 2015 nai = mNetworkForNetId.get(msg.arg2); 2016 } 2017 if (nai != null) { 2018 final boolean valid = 2019 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2020 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2021 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2022 if (valid != nai.lastValidated) { 2023 final int oldScore = nai.getCurrentScore(); 2024 nai.lastValidated = valid; 2025 nai.everValidated |= valid; 2026 updateCapabilities(nai, nai.networkCapabilities); 2027 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2028 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2029 } 2030 updateInetCondition(nai); 2031 // Let the NetworkAgent know the state of its network 2032 Bundle redirectUrlBundle = new Bundle(); 2033 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2034 nai.asyncChannel.sendMessage( 2035 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2036 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2037 0, redirectUrlBundle); 2038 } 2039 break; 2040 } 2041 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 2042 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2043 if (isLiveNetworkAgent(nai, msg.what)) { 2044 handleLingerComplete(nai); 2045 } 2046 break; 2047 } 2048 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2049 final int netId = msg.arg2; 2050 final boolean visible = (msg.arg1 != 0); 2051 final NetworkAgentInfo nai; 2052 synchronized (mNetworkForNetId) { 2053 nai = mNetworkForNetId.get(netId); 2054 } 2055 // If captive portal status has changed, update capabilities. 2056 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2057 nai.lastCaptivePortalDetected = visible; 2058 nai.everCaptivePortalDetected |= visible; 2059 updateCapabilities(nai, nai.networkCapabilities); 2060 } 2061 if (!visible) { 2062 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2063 } else { 2064 if (nai == null) { 2065 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2066 break; 2067 } 2068 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2069 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2070 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2071 } 2072 break; 2073 } 2074 } 2075 return true; 2076 } 2077 2078 @Override 2079 public void handleMessage(Message msg) { 2080 if (!maybeHandleAsyncChannelMessage(msg) && !maybeHandleNetworkMonitorMessage(msg)) { 2081 maybeHandleNetworkAgentMessage(msg); 2082 } 2083 } 2084 } 2085 2086 private void linger(NetworkAgentInfo nai) { 2087 nai.lingering = true; 2088 NetworkEvent.logEvent(nai.network.netId, NetworkEvent.NETWORK_LINGER); 2089 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 2090 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 2091 } 2092 2093 // Cancel any lingering so the linger timeout doesn't teardown a network. 2094 // This should be called when a network begins satisfying a NetworkRequest. 2095 // Note: depending on what state the NetworkMonitor is in (e.g., 2096 // if it's awaiting captive portal login, or if validation failed), this 2097 // may trigger a re-evaluation of the network. 2098 private void unlinger(NetworkAgentInfo nai) { 2099 nai.networkLingered.clear(); 2100 if (!nai.lingering) return; 2101 nai.lingering = false; 2102 NetworkEvent.logEvent(nai.network.netId, NetworkEvent.NETWORK_UNLINGER); 2103 if (VDBG) log("Canceling linger of " + nai.name()); 2104 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2105 } 2106 2107 private void handleAsyncChannelHalfConnect(Message msg) { 2108 AsyncChannel ac = (AsyncChannel) msg.obj; 2109 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2110 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2111 if (VDBG) log("NetworkFactory connected"); 2112 // A network factory has connected. Send it all current NetworkRequests. 2113 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2114 if (!nri.isRequest()) continue; 2115 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2116 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2117 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2118 } 2119 } else { 2120 loge("Error connecting NetworkFactory"); 2121 mNetworkFactoryInfos.remove(msg.obj); 2122 } 2123 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2124 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2125 if (VDBG) log("NetworkAgent connected"); 2126 // A network agent has requested a connection. Establish the connection. 2127 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2128 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2129 } else { 2130 loge("Error connecting NetworkAgent"); 2131 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2132 if (nai != null) { 2133 final boolean wasDefault = isDefaultNetwork(nai); 2134 synchronized (mNetworkForNetId) { 2135 mNetworkForNetId.remove(nai.network.netId); 2136 mNetIdInUse.delete(nai.network.netId); 2137 } 2138 // Just in case. 2139 mLegacyTypeTracker.remove(nai, wasDefault); 2140 } 2141 } 2142 } 2143 } 2144 2145 private void handleAsyncChannelDisconnected(Message msg) { 2146 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2147 if (nai != null) { 2148 if (DBG) { 2149 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2150 } 2151 // A network agent has disconnected. 2152 // TODO - if we move the logic to the network agent (have them disconnect 2153 // because they lost all their requests or because their score isn't good) 2154 // then they would disconnect organically, report their new state and then 2155 // disconnect the channel. 2156 if (nai.networkInfo.isConnected()) { 2157 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2158 null, null); 2159 } 2160 final boolean wasDefault = isDefaultNetwork(nai); 2161 if (wasDefault) { 2162 mDefaultInetConditionPublished = 0; 2163 } 2164 notifyIfacesChangedForNetworkStats(); 2165 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2166 // by other networks that are already connected. Perhaps that can be done by 2167 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2168 // of rematchAllNetworksAndRequests 2169 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2170 mKeepaliveTracker.handleStopAllKeepalives(nai, 2171 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2172 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2173 mNetworkAgentInfos.remove(msg.replyTo); 2174 updateClat(null, nai.linkProperties, nai); 2175 synchronized (mNetworkForNetId) { 2176 // Remove the NetworkAgent, but don't mark the netId as 2177 // available until we've told netd to delete it below. 2178 mNetworkForNetId.remove(nai.network.netId); 2179 } 2180 // Remove all previously satisfied requests. 2181 for (int i = 0; i < nai.networkRequests.size(); i++) { 2182 NetworkRequest request = nai.networkRequests.valueAt(i); 2183 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2184 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2185 mNetworkForRequestId.remove(request.requestId); 2186 sendUpdatedScoreToFactories(request, 0); 2187 } 2188 } 2189 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2190 removeDataActivityTracking(nai); 2191 notifyLockdownVpn(nai); 2192 requestNetworkTransitionWakelock(nai.name()); 2193 } 2194 mLegacyTypeTracker.remove(nai, wasDefault); 2195 rematchAllNetworksAndRequests(null, 0); 2196 if (wasDefault && getDefaultNetwork() == null) { 2197 // Log that we lost the default network and there is no replacement. 2198 logDefaultNetworkEvent(null, nai); 2199 } 2200 if (nai.created) { 2201 // Tell netd to clean up the configuration for this network 2202 // (routing rules, DNS, etc). 2203 // This may be slow as it requires a lot of netd shelling out to ip and 2204 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2205 // after we've rematched networks with requests which should make a potential 2206 // fallback network the default or requested a new network from the 2207 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2208 // long time. 2209 try { 2210 mNetd.removeNetwork(nai.network.netId); 2211 } catch (Exception e) { 2212 loge("Exception removing network: " + e); 2213 } 2214 } 2215 synchronized (mNetworkForNetId) { 2216 mNetIdInUse.delete(nai.network.netId); 2217 } 2218 } else { 2219 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2220 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2221 } 2222 } 2223 2224 // If this method proves to be too slow then we can maintain a separate 2225 // pendingIntent => NetworkRequestInfo map. 2226 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2227 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2228 Intent intent = pendingIntent.getIntent(); 2229 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2230 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2231 if (existingPendingIntent != null && 2232 existingPendingIntent.getIntent().filterEquals(intent)) { 2233 return entry.getValue(); 2234 } 2235 } 2236 return null; 2237 } 2238 2239 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2240 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2241 2242 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2243 if (existingRequest != null) { // remove the existing request. 2244 if (DBG) log("Replacing " + existingRequest.request + " with " 2245 + nri.request + " because their intents matched."); 2246 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2247 } 2248 handleRegisterNetworkRequest(nri); 2249 } 2250 2251 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2252 mNetworkRequests.put(nri.request, nri); 2253 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2254 if (!nri.isRequest()) { 2255 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2256 if (nri.request.networkCapabilities.hasSignalStrength() && 2257 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2258 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2259 } 2260 } 2261 } 2262 rematchAllNetworksAndRequests(null, 0); 2263 if (nri.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2264 sendUpdatedScoreToFactories(nri.request, 0); 2265 } 2266 } 2267 2268 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2269 int callingUid) { 2270 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2271 if (nri != null) { 2272 handleReleaseNetworkRequest(nri.request, callingUid); 2273 } 2274 } 2275 2276 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2277 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2278 // would it have a chance of satisfying any NetworkRequests. 2279 private boolean unneeded(NetworkAgentInfo nai) { 2280 if (!nai.created || nai.isVPN() || nai.lingering) return false; 2281 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2282 // If this Network is already the highest scoring Network for a request, or if 2283 // there is hope for it to become one if it validated, then it is needed. 2284 if (nri.isRequest() && nai.satisfies(nri.request) && 2285 (nai.networkRequests.get(nri.request.requestId) != null || 2286 // Note that this catches two important cases: 2287 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2288 // is currently satisfying the request. This is desirable when 2289 // cellular ends up validating but WiFi does not. 2290 // 2. Unvalidated WiFi will not be reaped when validated cellular 2291 // is currently satisfying the request. This is desirable when 2292 // WiFi ends up validating and out scoring cellular. 2293 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2294 nai.getCurrentScoreAsValidated())) { 2295 return false; 2296 } 2297 } 2298 return true; 2299 } 2300 2301 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2302 NetworkRequestInfo nri = mNetworkRequests.get(request); 2303 if (nri != null) { 2304 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2305 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2306 return; 2307 } 2308 if (VDBG || (DBG && nri.isRequest())) log("releasing NetworkRequest " + request); 2309 nri.unlinkDeathRecipient(); 2310 mNetworkRequests.remove(request); 2311 synchronized (mUidToNetworkRequestCount) { 2312 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2313 if (requests < 1) { 2314 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2315 nri.mUid); 2316 } else if (requests == 1) { 2317 mUidToNetworkRequestCount.removeAt( 2318 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2319 } else { 2320 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2321 } 2322 } 2323 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2324 if (nri.isRequest()) { 2325 // Find all networks that are satisfying this request and remove the request 2326 // from their request lists. 2327 // TODO - it's my understanding that for a request there is only a single 2328 // network satisfying it, so this loop is wasteful 2329 boolean wasKept = false; 2330 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2331 if (nai.networkRequests.get(nri.request.requestId) != null) { 2332 nai.networkRequests.remove(nri.request.requestId); 2333 if (VDBG) { 2334 log(" Removing from current network " + nai.name() + 2335 ", leaving " + nai.networkRequests.size() + 2336 " requests."); 2337 } 2338 if (unneeded(nai)) { 2339 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2340 teardownUnneededNetwork(nai); 2341 } else { 2342 // suspect there should only be one pass through here 2343 // but if any were kept do the check below 2344 wasKept |= true; 2345 } 2346 } 2347 } 2348 2349 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2350 if (nai != null) { 2351 mNetworkForRequestId.remove(nri.request.requestId); 2352 } 2353 // Maintain the illusion. When this request arrived, we might have pretended 2354 // that a network connected to serve it, even though the network was already 2355 // connected. Now that this request has gone away, we might have to pretend 2356 // that the network disconnected. LegacyTypeTracker will generate that 2357 // phantom disconnect for this type. 2358 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2359 boolean doRemove = true; 2360 if (wasKept) { 2361 // check if any of the remaining requests for this network are for the 2362 // same legacy type - if so, don't remove the nai 2363 for (int i = 0; i < nai.networkRequests.size(); i++) { 2364 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2365 if (otherRequest.legacyType == nri.request.legacyType && 2366 isRequest(otherRequest)) { 2367 if (DBG) log(" still have other legacy request - leaving"); 2368 doRemove = false; 2369 } 2370 } 2371 } 2372 2373 if (doRemove) { 2374 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2375 } 2376 } 2377 2378 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2379 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2380 nri.request); 2381 } 2382 } else { 2383 // listens don't have a singular affectedNetwork. Check all networks to see 2384 // if this listen request applies and remove it. 2385 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2386 nai.networkRequests.remove(nri.request.requestId); 2387 if (nri.request.networkCapabilities.hasSignalStrength() && 2388 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2389 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2390 } 2391 } 2392 } 2393 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2394 } 2395 } 2396 2397 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2398 enforceConnectivityInternalPermission(); 2399 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2400 accept ? 1 : 0, always ? 1: 0, network)); 2401 } 2402 2403 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2404 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2405 " accept=" + accept + " always=" + always); 2406 2407 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2408 if (nai == null) { 2409 // Nothing to do. 2410 return; 2411 } 2412 2413 if (nai.everValidated) { 2414 // The network validated while the dialog box was up. Take no action. 2415 return; 2416 } 2417 2418 if (!nai.networkMisc.explicitlySelected) { 2419 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2420 } 2421 2422 if (accept != nai.networkMisc.acceptUnvalidated) { 2423 int oldScore = nai.getCurrentScore(); 2424 nai.networkMisc.acceptUnvalidated = accept; 2425 rematchAllNetworksAndRequests(nai, oldScore); 2426 sendUpdatedScoreToFactories(nai); 2427 } 2428 2429 if (always) { 2430 nai.asyncChannel.sendMessage( 2431 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2432 } 2433 2434 if (!accept) { 2435 // Tell the NetworkAgent to not automatically reconnect to the network. 2436 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2437 // Teardown the nework. 2438 teardownUnneededNetwork(nai); 2439 } 2440 2441 } 2442 2443 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2444 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2445 mHandler.sendMessageDelayed( 2446 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2447 PROMPT_UNVALIDATED_DELAY_MS); 2448 } 2449 2450 private void handlePromptUnvalidated(Network network) { 2451 if (VDBG) log("handlePromptUnvalidated " + network); 2452 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2453 2454 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2455 // we haven't already been told to switch to it regardless of whether it validated or not. 2456 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2457 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2458 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2459 return; 2460 } 2461 2462 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2463 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2464 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2465 intent.setClassName("com.android.settings", 2466 "com.android.settings.wifi.WifiNoInternetDialog"); 2467 2468 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2469 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2470 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2471 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2472 } 2473 2474 private class InternalHandler extends Handler { 2475 public InternalHandler(Looper looper) { 2476 super(looper); 2477 } 2478 2479 @Override 2480 public void handleMessage(Message msg) { 2481 switch (msg.what) { 2482 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2483 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2484 String causedBy = null; 2485 synchronized (ConnectivityService.this) { 2486 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2487 mNetTransitionWakeLock.isHeld()) { 2488 mNetTransitionWakeLock.release(); 2489 causedBy = mNetTransitionWakeLockCausedBy; 2490 } else { 2491 break; 2492 } 2493 } 2494 if (VDBG) { 2495 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2496 log("Failed to find a new network - expiring NetTransition Wakelock"); 2497 } else { 2498 log("NetTransition Wakelock (" + 2499 (causedBy == null ? "unknown" : causedBy) + 2500 " cleared because we found a replacement network"); 2501 } 2502 } 2503 break; 2504 } 2505 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2506 handleDeprecatedGlobalHttpProxy(); 2507 break; 2508 } 2509 case EVENT_PROXY_HAS_CHANGED: { 2510 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2511 break; 2512 } 2513 case EVENT_REGISTER_NETWORK_FACTORY: { 2514 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2515 break; 2516 } 2517 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2518 handleUnregisterNetworkFactory((Messenger)msg.obj); 2519 break; 2520 } 2521 case EVENT_REGISTER_NETWORK_AGENT: { 2522 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2523 break; 2524 } 2525 case EVENT_REGISTER_NETWORK_REQUEST: 2526 case EVENT_REGISTER_NETWORK_LISTENER: { 2527 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2528 break; 2529 } 2530 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2531 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2532 handleRegisterNetworkRequestWithIntent(msg); 2533 break; 2534 } 2535 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2536 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2537 break; 2538 } 2539 case EVENT_RELEASE_NETWORK_REQUEST: { 2540 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2541 break; 2542 } 2543 case EVENT_SET_ACCEPT_UNVALIDATED: { 2544 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2545 break; 2546 } 2547 case EVENT_PROMPT_UNVALIDATED: { 2548 handlePromptUnvalidated((Network) msg.obj); 2549 break; 2550 } 2551 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2552 handleMobileDataAlwaysOn(); 2553 break; 2554 } 2555 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2556 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2557 mKeepaliveTracker.handleStartKeepalive(msg); 2558 break; 2559 } 2560 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2561 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2562 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2563 int slot = msg.arg1; 2564 int reason = msg.arg2; 2565 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2566 break; 2567 } 2568 case EVENT_SYSTEM_READY: { 2569 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2570 nai.networkMonitor.systemReady = true; 2571 } 2572 break; 2573 } 2574 } 2575 } 2576 } 2577 2578 // javadoc from interface 2579 public int tether(String iface) { 2580 ConnectivityManager.enforceTetherChangePermission(mContext); 2581 if (isTetheringSupported()) { 2582 final int status = mTethering.tether(iface); 2583 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2584 try { 2585 mPolicyManager.onTetheringChanged(iface, true); 2586 } catch (RemoteException e) { 2587 } 2588 } 2589 return status; 2590 } else { 2591 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2592 } 2593 } 2594 2595 // javadoc from interface 2596 public int untether(String iface) { 2597 ConnectivityManager.enforceTetherChangePermission(mContext); 2598 2599 if (isTetheringSupported()) { 2600 final int status = mTethering.untether(iface); 2601 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2602 try { 2603 mPolicyManager.onTetheringChanged(iface, false); 2604 } catch (RemoteException e) { 2605 } 2606 } 2607 return status; 2608 } else { 2609 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2610 } 2611 } 2612 2613 // javadoc from interface 2614 public int getLastTetherError(String iface) { 2615 enforceTetherAccessPermission(); 2616 2617 if (isTetheringSupported()) { 2618 return mTethering.getLastTetherError(iface); 2619 } else { 2620 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2621 } 2622 } 2623 2624 // TODO - proper iface API for selection by property, inspection, etc 2625 public String[] getTetherableUsbRegexs() { 2626 enforceTetherAccessPermission(); 2627 if (isTetheringSupported()) { 2628 return mTethering.getTetherableUsbRegexs(); 2629 } else { 2630 return new String[0]; 2631 } 2632 } 2633 2634 public String[] getTetherableWifiRegexs() { 2635 enforceTetherAccessPermission(); 2636 if (isTetheringSupported()) { 2637 return mTethering.getTetherableWifiRegexs(); 2638 } else { 2639 return new String[0]; 2640 } 2641 } 2642 2643 public String[] getTetherableBluetoothRegexs() { 2644 enforceTetherAccessPermission(); 2645 if (isTetheringSupported()) { 2646 return mTethering.getTetherableBluetoothRegexs(); 2647 } else { 2648 return new String[0]; 2649 } 2650 } 2651 2652 public int setUsbTethering(boolean enable) { 2653 ConnectivityManager.enforceTetherChangePermission(mContext); 2654 if (isTetheringSupported()) { 2655 return mTethering.setUsbTethering(enable); 2656 } else { 2657 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2658 } 2659 } 2660 2661 // TODO - move iface listing, queries, etc to new module 2662 // javadoc from interface 2663 public String[] getTetherableIfaces() { 2664 enforceTetherAccessPermission(); 2665 return mTethering.getTetherableIfaces(); 2666 } 2667 2668 public String[] getTetheredIfaces() { 2669 enforceTetherAccessPermission(); 2670 return mTethering.getTetheredIfaces(); 2671 } 2672 2673 public String[] getTetheringErroredIfaces() { 2674 enforceTetherAccessPermission(); 2675 return mTethering.getErroredIfaces(); 2676 } 2677 2678 public String[] getTetheredDhcpRanges() { 2679 enforceConnectivityInternalPermission(); 2680 return mTethering.getTetheredDhcpRanges(); 2681 } 2682 2683 // if ro.tether.denied = true we default to no tethering 2684 // gservices could set the secure setting to 1 though to enable it on a build where it 2685 // had previously been turned off. 2686 @Override 2687 public boolean isTetheringSupported() { 2688 enforceTetherAccessPermission(); 2689 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2690 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2691 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2692 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2693 return tetherEnabledInSettings && mUserManager.isAdminUser() && 2694 ((mTethering.getTetherableUsbRegexs().length != 0 || 2695 mTethering.getTetherableWifiRegexs().length != 0 || 2696 mTethering.getTetherableBluetoothRegexs().length != 0) && 2697 mTethering.getUpstreamIfaceTypes().length != 0); 2698 } 2699 2700 @Override 2701 public void startTethering(int type, ResultReceiver receiver, 2702 boolean showProvisioningUi) { 2703 ConnectivityManager.enforceTetherChangePermission(mContext); 2704 if (!isTetheringSupported()) { 2705 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 2706 return; 2707 } 2708 mTethering.startTethering(type, receiver, showProvisioningUi); 2709 } 2710 2711 @Override 2712 public void stopTethering(int type) { 2713 ConnectivityManager.enforceTetherChangePermission(mContext); 2714 mTethering.stopTethering(type); 2715 } 2716 2717 // Called when we lose the default network and have no replacement yet. 2718 // This will automatically be cleared after X seconds or a new default network 2719 // becomes CONNECTED, whichever happens first. The timer is started by the 2720 // first caller and not restarted by subsequent callers. 2721 private void requestNetworkTransitionWakelock(String forWhom) { 2722 int serialNum = 0; 2723 synchronized (this) { 2724 if (mNetTransitionWakeLock.isHeld()) return; 2725 serialNum = ++mNetTransitionWakeLockSerialNumber; 2726 mNetTransitionWakeLock.acquire(); 2727 mNetTransitionWakeLockCausedBy = forWhom; 2728 } 2729 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2730 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2731 mNetTransitionWakeLockTimeout); 2732 return; 2733 } 2734 2735 // 100 percent is full good, 0 is full bad. 2736 public void reportInetCondition(int networkType, int percentage) { 2737 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2738 if (nai == null) return; 2739 reportNetworkConnectivity(nai.network, percentage > 50); 2740 } 2741 2742 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2743 enforceAccessPermission(); 2744 enforceInternetPermission(); 2745 2746 NetworkAgentInfo nai; 2747 if (network == null) { 2748 nai = getDefaultNetwork(); 2749 } else { 2750 nai = getNetworkAgentInfoForNetwork(network); 2751 } 2752 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2753 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2754 return; 2755 } 2756 // Revalidate if the app report does not match our current validated state. 2757 if (hasConnectivity == nai.lastValidated) return; 2758 final int uid = Binder.getCallingUid(); 2759 if (DBG) { 2760 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2761 ") by " + uid); 2762 } 2763 synchronized (nai) { 2764 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2765 // which isn't meant to work on uncreated networks. 2766 if (!nai.created) return; 2767 2768 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2769 2770 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2771 } 2772 } 2773 2774 private ProxyInfo getDefaultProxy() { 2775 // this information is already available as a world read/writable jvm property 2776 // so this API change wouldn't have a benifit. It also breaks the passing 2777 // of proxy info to all the JVMs. 2778 // enforceAccessPermission(); 2779 synchronized (mProxyLock) { 2780 ProxyInfo ret = mGlobalProxy; 2781 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2782 return ret; 2783 } 2784 } 2785 2786 public ProxyInfo getProxyForNetwork(Network network) { 2787 if (network == null) return getDefaultProxy(); 2788 final ProxyInfo globalProxy = getGlobalProxy(); 2789 if (globalProxy != null) return globalProxy; 2790 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 2791 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 2792 // caller may not have. 2793 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2794 if (nai == null) return null; 2795 synchronized (nai) { 2796 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 2797 if (proxyInfo == null) return null; 2798 return new ProxyInfo(proxyInfo); 2799 } 2800 } 2801 2802 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2803 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2804 // proxy is null then there is no proxy in place). 2805 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2806 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2807 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2808 proxy = null; 2809 } 2810 return proxy; 2811 } 2812 2813 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2814 // better for determining if a new proxy broadcast is necessary: 2815 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2816 // avoid unnecessary broadcasts. 2817 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2818 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2819 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2820 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2821 // all set. 2822 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2823 a = canonicalizeProxyInfo(a); 2824 b = canonicalizeProxyInfo(b); 2825 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2826 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2827 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2828 } 2829 2830 public void setGlobalProxy(ProxyInfo proxyProperties) { 2831 enforceConnectivityInternalPermission(); 2832 2833 synchronized (mProxyLock) { 2834 if (proxyProperties == mGlobalProxy) return; 2835 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2836 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2837 2838 String host = ""; 2839 int port = 0; 2840 String exclList = ""; 2841 String pacFileUrl = ""; 2842 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2843 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2844 if (!proxyProperties.isValid()) { 2845 if (DBG) 2846 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2847 return; 2848 } 2849 mGlobalProxy = new ProxyInfo(proxyProperties); 2850 host = mGlobalProxy.getHost(); 2851 port = mGlobalProxy.getPort(); 2852 exclList = mGlobalProxy.getExclusionListAsString(); 2853 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2854 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2855 } 2856 } else { 2857 mGlobalProxy = null; 2858 } 2859 ContentResolver res = mContext.getContentResolver(); 2860 final long token = Binder.clearCallingIdentity(); 2861 try { 2862 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2863 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2864 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2865 exclList); 2866 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2867 } finally { 2868 Binder.restoreCallingIdentity(token); 2869 } 2870 2871 if (mGlobalProxy == null) { 2872 proxyProperties = mDefaultProxy; 2873 } 2874 sendProxyBroadcast(proxyProperties); 2875 } 2876 } 2877 2878 private void loadGlobalProxy() { 2879 ContentResolver res = mContext.getContentResolver(); 2880 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2881 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2882 String exclList = Settings.Global.getString(res, 2883 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2884 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2885 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2886 ProxyInfo proxyProperties; 2887 if (!TextUtils.isEmpty(pacFileUrl)) { 2888 proxyProperties = new ProxyInfo(pacFileUrl); 2889 } else { 2890 proxyProperties = new ProxyInfo(host, port, exclList); 2891 } 2892 if (!proxyProperties.isValid()) { 2893 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2894 return; 2895 } 2896 2897 synchronized (mProxyLock) { 2898 mGlobalProxy = proxyProperties; 2899 } 2900 } 2901 } 2902 2903 public ProxyInfo getGlobalProxy() { 2904 // this information is already available as a world read/writable jvm property 2905 // so this API change wouldn't have a benifit. It also breaks the passing 2906 // of proxy info to all the JVMs. 2907 // enforceAccessPermission(); 2908 synchronized (mProxyLock) { 2909 return mGlobalProxy; 2910 } 2911 } 2912 2913 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2914 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2915 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2916 proxy = null; 2917 } 2918 synchronized (mProxyLock) { 2919 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2920 if (mDefaultProxy == proxy) return; // catches repeated nulls 2921 if (proxy != null && !proxy.isValid()) { 2922 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2923 return; 2924 } 2925 2926 // This call could be coming from the PacManager, containing the port of the local 2927 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2928 // global (to get the correct local port), and send a broadcast. 2929 // TODO: Switch PacManager to have its own message to send back rather than 2930 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2931 if ((mGlobalProxy != null) && (proxy != null) 2932 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2933 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2934 mGlobalProxy = proxy; 2935 sendProxyBroadcast(mGlobalProxy); 2936 return; 2937 } 2938 mDefaultProxy = proxy; 2939 2940 if (mGlobalProxy != null) return; 2941 if (!mDefaultProxyDisabled) { 2942 sendProxyBroadcast(proxy); 2943 } 2944 } 2945 } 2946 2947 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2948 // This method gets called when any network changes proxy, but the broadcast only ever contains 2949 // the default proxy (even if it hasn't changed). 2950 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2951 // world where an app might be bound to a non-default network. 2952 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2953 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2954 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2955 2956 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2957 sendProxyBroadcast(getDefaultProxy()); 2958 } 2959 } 2960 2961 private void handleDeprecatedGlobalHttpProxy() { 2962 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2963 Settings.Global.HTTP_PROXY); 2964 if (!TextUtils.isEmpty(proxy)) { 2965 String data[] = proxy.split(":"); 2966 if (data.length == 0) { 2967 return; 2968 } 2969 2970 String proxyHost = data[0]; 2971 int proxyPort = 8080; 2972 if (data.length > 1) { 2973 try { 2974 proxyPort = Integer.parseInt(data[1]); 2975 } catch (NumberFormatException e) { 2976 return; 2977 } 2978 } 2979 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2980 setGlobalProxy(p); 2981 } 2982 } 2983 2984 private void sendProxyBroadcast(ProxyInfo proxy) { 2985 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2986 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2987 if (DBG) log("sending Proxy Broadcast for " + proxy); 2988 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2989 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2990 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2991 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2992 final long ident = Binder.clearCallingIdentity(); 2993 try { 2994 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2995 } finally { 2996 Binder.restoreCallingIdentity(ident); 2997 } 2998 } 2999 3000 private static class SettingsObserver extends ContentObserver { 3001 final private HashMap<Uri, Integer> mUriEventMap; 3002 final private Context mContext; 3003 final private Handler mHandler; 3004 3005 SettingsObserver(Context context, Handler handler) { 3006 super(null); 3007 mUriEventMap = new HashMap<Uri, Integer>(); 3008 mContext = context; 3009 mHandler = handler; 3010 } 3011 3012 void observe(Uri uri, int what) { 3013 mUriEventMap.put(uri, what); 3014 final ContentResolver resolver = mContext.getContentResolver(); 3015 resolver.registerContentObserver(uri, false, this); 3016 } 3017 3018 @Override 3019 public void onChange(boolean selfChange) { 3020 Slog.wtf(TAG, "Should never be reached."); 3021 } 3022 3023 @Override 3024 public void onChange(boolean selfChange, Uri uri) { 3025 final Integer what = mUriEventMap.get(uri); 3026 if (what != null) { 3027 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3028 } else { 3029 loge("No matching event to send for URI=" + uri); 3030 } 3031 } 3032 } 3033 3034 private static void log(String s) { 3035 Slog.d(TAG, s); 3036 } 3037 3038 private static void loge(String s) { 3039 Slog.e(TAG, s); 3040 } 3041 3042 private static <T> T checkNotNull(T value, String message) { 3043 if (value == null) { 3044 throw new NullPointerException(message); 3045 } 3046 return value; 3047 } 3048 3049 /** 3050 * Prepare for a VPN application. 3051 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3052 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3053 * 3054 * @param oldPackage Package name of the application which currently controls VPN, which will 3055 * be replaced. If there is no such application, this should should either be 3056 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3057 * @param newPackage Package name of the application which should gain control of VPN, or 3058 * {@code null} to disable. 3059 * @param userId User for whom to prepare the new VPN. 3060 * 3061 * @hide 3062 */ 3063 @Override 3064 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3065 int userId) { 3066 enforceCrossUserPermission(userId); 3067 throwIfLockdownEnabled(); 3068 3069 synchronized(mVpns) { 3070 Vpn vpn = mVpns.get(userId); 3071 if (vpn != null) { 3072 return vpn.prepare(oldPackage, newPackage); 3073 } else { 3074 return false; 3075 } 3076 } 3077 } 3078 3079 /** 3080 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3081 * This method is used by system-privileged apps. 3082 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3083 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3084 * 3085 * @param packageName The package for which authorization state should change. 3086 * @param userId User for whom {@code packageName} is installed. 3087 * @param authorized {@code true} if this app should be able to start a VPN connection without 3088 * explicit user approval, {@code false} if not. 3089 * 3090 * @hide 3091 */ 3092 @Override 3093 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3094 enforceCrossUserPermission(userId); 3095 3096 synchronized(mVpns) { 3097 Vpn vpn = mVpns.get(userId); 3098 if (vpn != null) { 3099 vpn.setPackageAuthorization(packageName, authorized); 3100 } 3101 } 3102 } 3103 3104 /** 3105 * Configure a TUN interface and return its file descriptor. Parameters 3106 * are encoded and opaque to this class. This method is used by VpnBuilder 3107 * and not available in ConnectivityManager. Permissions are checked in 3108 * Vpn class. 3109 * @hide 3110 */ 3111 @Override 3112 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3113 throwIfLockdownEnabled(); 3114 int user = UserHandle.getUserId(Binder.getCallingUid()); 3115 synchronized(mVpns) { 3116 return mVpns.get(user).establish(config); 3117 } 3118 } 3119 3120 /** 3121 * Start legacy VPN, controlling native daemons as needed. Creates a 3122 * secondary thread to perform connection work, returning quickly. 3123 */ 3124 @Override 3125 public void startLegacyVpn(VpnProfile profile) { 3126 throwIfLockdownEnabled(); 3127 final LinkProperties egress = getActiveLinkProperties(); 3128 if (egress == null) { 3129 throw new IllegalStateException("Missing active network connection"); 3130 } 3131 int user = UserHandle.getUserId(Binder.getCallingUid()); 3132 synchronized(mVpns) { 3133 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3134 } 3135 } 3136 3137 /** 3138 * Return the information of the ongoing legacy VPN. This method is used 3139 * by VpnSettings and not available in ConnectivityManager. Permissions 3140 * are checked in Vpn class. 3141 */ 3142 @Override 3143 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3144 enforceCrossUserPermission(userId); 3145 if (mLockdownEnabled) { 3146 return null; 3147 } 3148 3149 synchronized(mVpns) { 3150 return mVpns.get(userId).getLegacyVpnInfo(); 3151 } 3152 } 3153 3154 /** 3155 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3156 * and not available in ConnectivityManager. 3157 */ 3158 @Override 3159 public VpnInfo[] getAllVpnInfo() { 3160 enforceConnectivityInternalPermission(); 3161 if (mLockdownEnabled) { 3162 return new VpnInfo[0]; 3163 } 3164 3165 synchronized(mVpns) { 3166 List<VpnInfo> infoList = new ArrayList<>(); 3167 for (int i = 0; i < mVpns.size(); i++) { 3168 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3169 if (info != null) { 3170 infoList.add(info); 3171 } 3172 } 3173 return infoList.toArray(new VpnInfo[infoList.size()]); 3174 } 3175 } 3176 3177 /** 3178 * @return VPN information for accounting, or null if we can't retrieve all required 3179 * information, e.g primary underlying iface. 3180 */ 3181 @Nullable 3182 private VpnInfo createVpnInfo(Vpn vpn) { 3183 VpnInfo info = vpn.getVpnInfo(); 3184 if (info == null) { 3185 return null; 3186 } 3187 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3188 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3189 // the underlyingNetworks list. 3190 if (underlyingNetworks == null) { 3191 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3192 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3193 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3194 } 3195 } else if (underlyingNetworks.length > 0) { 3196 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3197 if (linkProperties != null) { 3198 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3199 } 3200 } 3201 return info.primaryUnderlyingIface == null ? null : info; 3202 } 3203 3204 /** 3205 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3206 * VpnDialogs and not available in ConnectivityManager. 3207 * Permissions are checked in Vpn class. 3208 * @hide 3209 */ 3210 @Override 3211 public VpnConfig getVpnConfig(int userId) { 3212 enforceCrossUserPermission(userId); 3213 synchronized(mVpns) { 3214 Vpn vpn = mVpns.get(userId); 3215 if (vpn != null) { 3216 return vpn.getVpnConfig(); 3217 } else { 3218 return null; 3219 } 3220 } 3221 } 3222 3223 @Override 3224 public boolean updateLockdownVpn() { 3225 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3226 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3227 return false; 3228 } 3229 3230 // Tear down existing lockdown if profile was removed 3231 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3232 if (mLockdownEnabled) { 3233 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3234 final VpnProfile profile = VpnProfile.decode( 3235 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3236 if (profile == null) { 3237 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3238 setLockdownTracker(null); 3239 return true; 3240 } 3241 int user = UserHandle.getUserId(Binder.getCallingUid()); 3242 synchronized(mVpns) { 3243 Vpn vpn = mVpns.get(user); 3244 if (vpn == null) { 3245 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3246 return false; 3247 } 3248 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3249 } 3250 } else { 3251 setLockdownTracker(null); 3252 } 3253 3254 return true; 3255 } 3256 3257 /** 3258 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3259 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3260 */ 3261 private void setLockdownTracker(LockdownVpnTracker tracker) { 3262 // Shutdown any existing tracker 3263 final LockdownVpnTracker existing = mLockdownTracker; 3264 mLockdownTracker = null; 3265 if (existing != null) { 3266 existing.shutdown(); 3267 } 3268 3269 try { 3270 if (tracker != null) { 3271 mNetd.setFirewallEnabled(true); 3272 mNetd.setFirewallInterfaceRule("lo", true); 3273 mLockdownTracker = tracker; 3274 mLockdownTracker.init(); 3275 } else { 3276 mNetd.setFirewallEnabled(false); 3277 } 3278 } catch (RemoteException e) { 3279 // ignored; NMS lives inside system_server 3280 } 3281 } 3282 3283 private void throwIfLockdownEnabled() { 3284 if (mLockdownEnabled) { 3285 throw new IllegalStateException("Unavailable in lockdown mode"); 3286 } 3287 } 3288 3289 /** 3290 * Sets up or tears down the always-on VPN for user {@param user} as appropriate. 3291 * 3292 * @return {@code false} in case of errors; {@code true} otherwise. 3293 */ 3294 private boolean updateAlwaysOnVpn(int user) { 3295 final String lockdownPackage = getAlwaysOnVpnPackage(user); 3296 if (lockdownPackage == null) { 3297 return true; 3298 } 3299 3300 // Create an intent to start the VPN service declared in the app's manifest. 3301 Intent serviceIntent = new Intent(VpnConfig.SERVICE_INTERFACE); 3302 serviceIntent.setPackage(lockdownPackage); 3303 3304 try { 3305 return mContext.startServiceAsUser(serviceIntent, UserHandle.of(user)) != null; 3306 } catch (RuntimeException e) { 3307 return false; 3308 } 3309 } 3310 3311 @Override 3312 public boolean setAlwaysOnVpnPackage(int userId, String packageName) { 3313 enforceConnectivityInternalPermission(); 3314 enforceCrossUserPermission(userId); 3315 3316 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3317 if (LockdownVpnTracker.isEnabled()) { 3318 return false; 3319 } 3320 3321 // If the current VPN package is the same as the new one, this is a no-op 3322 final String oldPackage = getAlwaysOnVpnPackage(userId); 3323 if (TextUtils.equals(oldPackage, packageName)) { 3324 return true; 3325 } 3326 3327 synchronized (mVpns) { 3328 Vpn vpn = mVpns.get(userId); 3329 if (vpn == null) { 3330 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3331 return false; 3332 } 3333 if (!vpn.setAlwaysOnPackage(packageName)) { 3334 return false; 3335 } 3336 if (!updateAlwaysOnVpn(userId)) { 3337 vpn.setAlwaysOnPackage(null); 3338 return false; 3339 } 3340 } 3341 return true; 3342 } 3343 3344 @Override 3345 public String getAlwaysOnVpnPackage(int userId) { 3346 enforceConnectivityInternalPermission(); 3347 enforceCrossUserPermission(userId); 3348 3349 synchronized (mVpns) { 3350 Vpn vpn = mVpns.get(userId); 3351 if (vpn == null) { 3352 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3353 return null; 3354 } 3355 return vpn.getAlwaysOnPackage(); 3356 } 3357 } 3358 3359 @Override 3360 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3361 // TODO: Remove? Any reason to trigger a provisioning check? 3362 return -1; 3363 } 3364 3365 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3366 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3367 3368 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3369 Intent intent = new Intent(action); 3370 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3371 // Concatenate the range of types onto the range of NetIDs. 3372 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3373 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3374 networkType, null, pendingIntent, false); 3375 } 3376 3377 /** 3378 * Show or hide network provisioning notifications. 3379 * 3380 * We use notifications for two purposes: to notify that a network requires sign in 3381 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3382 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3383 * particular network we can display the notification type that was most recently requested. 3384 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3385 * might first display NO_INTERNET, and then when the captive portal check completes, display 3386 * SIGN_IN. 3387 * 3388 * @param id an identifier that uniquely identifies this notification. This must match 3389 * between show and hide calls. We use the NetID value but for legacy callers 3390 * we concatenate the range of types with the range of NetIDs. 3391 */ 3392 private void setProvNotificationVisibleIntent(boolean visible, int id, 3393 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3394 boolean highPriority) { 3395 if (VDBG || (DBG && visible)) { 3396 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3397 + " networkType=" + getNetworkTypeName(networkType) 3398 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3399 } 3400 3401 Resources r = Resources.getSystem(); 3402 NotificationManager notificationManager = (NotificationManager) mContext 3403 .getSystemService(Context.NOTIFICATION_SERVICE); 3404 3405 if (visible) { 3406 CharSequence title; 3407 CharSequence details; 3408 int icon; 3409 if (notifyType == NotificationType.NO_INTERNET && 3410 networkType == ConnectivityManager.TYPE_WIFI) { 3411 title = r.getString(R.string.wifi_no_internet, 0); 3412 details = r.getString(R.string.wifi_no_internet_detailed); 3413 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3414 } else if (notifyType == NotificationType.SIGN_IN) { 3415 switch (networkType) { 3416 case ConnectivityManager.TYPE_WIFI: 3417 title = r.getString(R.string.wifi_available_sign_in, 0); 3418 details = r.getString(R.string.network_available_sign_in_detailed, 3419 extraInfo); 3420 icon = R.drawable.stat_notify_wifi_in_range; 3421 break; 3422 case ConnectivityManager.TYPE_MOBILE: 3423 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3424 title = r.getString(R.string.network_available_sign_in, 0); 3425 // TODO: Change this to pull from NetworkInfo once a printable 3426 // name has been added to it 3427 details = mTelephonyManager.getNetworkOperatorName(); 3428 icon = R.drawable.stat_notify_rssi_in_range; 3429 break; 3430 default: 3431 title = r.getString(R.string.network_available_sign_in, 0); 3432 details = r.getString(R.string.network_available_sign_in_detailed, 3433 extraInfo); 3434 icon = R.drawable.stat_notify_rssi_in_range; 3435 break; 3436 } 3437 } else { 3438 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3439 + getNetworkTypeName(networkType)); 3440 return; 3441 } 3442 3443 Notification notification = new Notification.Builder(mContext) 3444 .setWhen(0) 3445 .setSmallIcon(icon) 3446 .setAutoCancel(true) 3447 .setTicker(title) 3448 .setColor(mContext.getColor( 3449 com.android.internal.R.color.system_notification_accent_color)) 3450 .setContentTitle(title) 3451 .setContentText(details) 3452 .setContentIntent(intent) 3453 .setLocalOnly(true) 3454 .setPriority(highPriority ? 3455 Notification.PRIORITY_HIGH : 3456 Notification.PRIORITY_DEFAULT) 3457 .setDefaults(highPriority ? Notification.DEFAULT_ALL : 0) 3458 .setOnlyAlertOnce(true) 3459 .build(); 3460 3461 try { 3462 notificationManager.notify(NOTIFICATION_ID, id, notification); 3463 } catch (NullPointerException npe) { 3464 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3465 npe.printStackTrace(); 3466 } 3467 } else { 3468 try { 3469 notificationManager.cancel(NOTIFICATION_ID, id); 3470 } catch (NullPointerException npe) { 3471 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3472 npe.printStackTrace(); 3473 } 3474 } 3475 } 3476 3477 /** Location to an updatable file listing carrier provisioning urls. 3478 * An example: 3479 * 3480 * <?xml version="1.0" encoding="utf-8"?> 3481 * <provisioningUrls> 3482 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3483 * </provisioningUrls> 3484 */ 3485 private static final String PROVISIONING_URL_PATH = 3486 "/data/misc/radio/provisioning_urls.xml"; 3487 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3488 3489 /** XML tag for root element. */ 3490 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3491 /** XML tag for individual url */ 3492 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3493 /** XML attribute for mcc */ 3494 private static final String ATTR_MCC = "mcc"; 3495 /** XML attribute for mnc */ 3496 private static final String ATTR_MNC = "mnc"; 3497 3498 private String getProvisioningUrlBaseFromFile() { 3499 FileReader fileReader = null; 3500 XmlPullParser parser = null; 3501 Configuration config = mContext.getResources().getConfiguration(); 3502 3503 try { 3504 fileReader = new FileReader(mProvisioningUrlFile); 3505 parser = Xml.newPullParser(); 3506 parser.setInput(fileReader); 3507 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3508 3509 while (true) { 3510 XmlUtils.nextElement(parser); 3511 3512 String element = parser.getName(); 3513 if (element == null) break; 3514 3515 if (element.equals(TAG_PROVISIONING_URL)) { 3516 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3517 try { 3518 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3519 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3520 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3521 parser.next(); 3522 if (parser.getEventType() == XmlPullParser.TEXT) { 3523 return parser.getText(); 3524 } 3525 } 3526 } 3527 } catch (NumberFormatException e) { 3528 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3529 } 3530 } 3531 } 3532 return null; 3533 } catch (FileNotFoundException e) { 3534 loge("Carrier Provisioning Urls file not found"); 3535 } catch (XmlPullParserException e) { 3536 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3537 } catch (IOException e) { 3538 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3539 } finally { 3540 if (fileReader != null) { 3541 try { 3542 fileReader.close(); 3543 } catch (IOException e) {} 3544 } 3545 } 3546 return null; 3547 } 3548 3549 @Override 3550 public String getMobileProvisioningUrl() { 3551 enforceConnectivityInternalPermission(); 3552 String url = getProvisioningUrlBaseFromFile(); 3553 if (TextUtils.isEmpty(url)) { 3554 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3555 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3556 } else { 3557 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3558 } 3559 // populate the iccid, imei and phone number in the provisioning url. 3560 if (!TextUtils.isEmpty(url)) { 3561 String phoneNumber = mTelephonyManager.getLine1Number(); 3562 if (TextUtils.isEmpty(phoneNumber)) { 3563 phoneNumber = "0000000000"; 3564 } 3565 url = String.format(url, 3566 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3567 mTelephonyManager.getDeviceId() /* IMEI */, 3568 phoneNumber /* Phone numer */); 3569 } 3570 3571 return url; 3572 } 3573 3574 @Override 3575 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3576 String action) { 3577 enforceConnectivityInternalPermission(); 3578 final long ident = Binder.clearCallingIdentity(); 3579 try { 3580 setProvNotificationVisible(visible, networkType, action); 3581 } finally { 3582 Binder.restoreCallingIdentity(ident); 3583 } 3584 } 3585 3586 @Override 3587 public void setAirplaneMode(boolean enable) { 3588 enforceConnectivityInternalPermission(); 3589 final long ident = Binder.clearCallingIdentity(); 3590 try { 3591 final ContentResolver cr = mContext.getContentResolver(); 3592 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3593 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3594 intent.putExtra("state", enable); 3595 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3596 } finally { 3597 Binder.restoreCallingIdentity(ident); 3598 } 3599 } 3600 3601 private void onUserStart(int userId) { 3602 synchronized(mVpns) { 3603 Vpn userVpn = mVpns.get(userId); 3604 if (userVpn != null) { 3605 loge("Starting user already has a VPN"); 3606 return; 3607 } 3608 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3609 mVpns.put(userId, userVpn); 3610 } 3611 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3612 updateLockdownVpn(); 3613 } else { 3614 updateAlwaysOnVpn(userId); 3615 } 3616 } 3617 3618 private void onUserStop(int userId) { 3619 synchronized(mVpns) { 3620 Vpn userVpn = mVpns.get(userId); 3621 if (userVpn == null) { 3622 loge("Stopped user has no VPN"); 3623 return; 3624 } 3625 mVpns.delete(userId); 3626 } 3627 } 3628 3629 private void onUserAdded(int userId) { 3630 synchronized(mVpns) { 3631 final int vpnsSize = mVpns.size(); 3632 for (int i = 0; i < vpnsSize; i++) { 3633 Vpn vpn = mVpns.valueAt(i); 3634 vpn.onUserAdded(userId); 3635 } 3636 } 3637 } 3638 3639 private void onUserRemoved(int userId) { 3640 synchronized(mVpns) { 3641 final int vpnsSize = mVpns.size(); 3642 for (int i = 0; i < vpnsSize; i++) { 3643 Vpn vpn = mVpns.valueAt(i); 3644 vpn.onUserRemoved(userId); 3645 } 3646 } 3647 } 3648 3649 private void onUserUnlocked(int userId) { 3650 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3651 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3652 updateLockdownVpn(); 3653 } else { 3654 updateAlwaysOnVpn(userId); 3655 } 3656 } 3657 3658 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3659 @Override 3660 public void onReceive(Context context, Intent intent) { 3661 final String action = intent.getAction(); 3662 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3663 if (userId == UserHandle.USER_NULL) return; 3664 3665 if (Intent.ACTION_USER_STARTING.equals(action)) { 3666 onUserStart(userId); 3667 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3668 onUserStop(userId); 3669 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3670 onUserAdded(userId); 3671 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3672 onUserRemoved(userId); 3673 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3674 onUserUnlocked(userId); 3675 } 3676 } 3677 }; 3678 3679 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3680 new HashMap<Messenger, NetworkFactoryInfo>(); 3681 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3682 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3683 3684 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3685 // Map from UID to number of NetworkRequests that UID has filed. 3686 @GuardedBy("mUidToNetworkRequestCount") 3687 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3688 3689 private static class NetworkFactoryInfo { 3690 public final String name; 3691 public final Messenger messenger; 3692 public final AsyncChannel asyncChannel; 3693 3694 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3695 this.name = name; 3696 this.messenger = messenger; 3697 this.asyncChannel = asyncChannel; 3698 } 3699 } 3700 3701 /** 3702 * A NetworkRequest as registered by an application can be one of three 3703 * types: 3704 * 3705 * - "listen", for which the framework will issue callbacks about any 3706 * and all networks that match the specified NetworkCapabilities, 3707 * 3708 * - "request", capable of causing a specific network to be created 3709 * first (e.g. a telephony DUN request), the framework will issue 3710 * callbacks about the single, highest scoring current network 3711 * (if any) that matches the specified NetworkCapabilities, or 3712 * 3713 * - "track the default network", a hybrid of the two designed such 3714 * that the framework will issue callbacks for the single, highest 3715 * scoring current network (if any) that matches the capabilities of 3716 * the default Internet request (mDefaultRequest), but which cannot 3717 * cause the framework to either create or retain the existence of 3718 * any specific network. 3719 * 3720 */ 3721 private static enum NetworkRequestType { 3722 LISTEN, 3723 TRACK_DEFAULT, 3724 REQUEST 3725 }; 3726 3727 /** 3728 * Tracks info about the requester. 3729 * Also used to notice when the calling process dies so we can self-expire 3730 */ 3731 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3732 final NetworkRequest request; 3733 final PendingIntent mPendingIntent; 3734 boolean mPendingIntentSent; 3735 private final IBinder mBinder; 3736 final int mPid; 3737 final int mUid; 3738 final Messenger messenger; 3739 private final NetworkRequestType mType; 3740 3741 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, NetworkRequestType type) { 3742 request = r; 3743 mPendingIntent = pi; 3744 messenger = null; 3745 mBinder = null; 3746 mPid = getCallingPid(); 3747 mUid = getCallingUid(); 3748 mType = type; 3749 enforceRequestCountLimit(); 3750 } 3751 3752 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, NetworkRequestType type) { 3753 super(); 3754 messenger = m; 3755 request = r; 3756 mBinder = binder; 3757 mPid = getCallingPid(); 3758 mUid = getCallingUid(); 3759 mType = type; 3760 mPendingIntent = null; 3761 enforceRequestCountLimit(); 3762 3763 try { 3764 mBinder.linkToDeath(this, 0); 3765 } catch (RemoteException e) { 3766 binderDied(); 3767 } 3768 } 3769 3770 private void enforceRequestCountLimit() { 3771 synchronized (mUidToNetworkRequestCount) { 3772 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 3773 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 3774 throw new IllegalArgumentException("Too many NetworkRequests filed"); 3775 } 3776 mUidToNetworkRequestCount.put(mUid, networkRequests); 3777 } 3778 } 3779 3780 private String typeString() { 3781 switch (mType) { 3782 case LISTEN: return "Listen"; 3783 case REQUEST: return "Request"; 3784 case TRACK_DEFAULT: return "Track default"; 3785 default: 3786 return "unknown type"; 3787 } 3788 } 3789 3790 void unlinkDeathRecipient() { 3791 if (mBinder != null) { 3792 mBinder.unlinkToDeath(this, 0); 3793 } 3794 } 3795 3796 public void binderDied() { 3797 log("ConnectivityService NetworkRequestInfo binderDied(" + 3798 request + ", " + mBinder + ")"); 3799 releaseNetworkRequest(request); 3800 } 3801 3802 /** 3803 * Returns true iff. the contained NetworkRequest is one that: 3804 * 3805 * - should be associated with at most one satisfying network 3806 * at a time; 3807 * 3808 * - should cause a network to be kept up if it is the only network 3809 * which can satisfy the NetworkReqeust. 3810 * 3811 * For full detail of how isRequest() is used for pairing Networks with 3812 * NetworkRequests read rematchNetworkAndRequests(). 3813 * 3814 * TODO: Rename to something more properly descriptive. 3815 */ 3816 public boolean isRequest() { 3817 return (mType == NetworkRequestType.TRACK_DEFAULT) || 3818 (mType == NetworkRequestType.REQUEST); 3819 } 3820 3821 public String toString() { 3822 return typeString() + 3823 " from uid/pid:" + mUid + "/" + mPid + 3824 " for " + request + 3825 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3826 } 3827 } 3828 3829 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3830 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3831 if (badCapability != null) { 3832 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3833 } 3834 } 3835 3836 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3837 final SortedSet<Integer> thresholds = new TreeSet(); 3838 synchronized (nai) { 3839 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3840 if (nri.request.networkCapabilities.hasSignalStrength() && 3841 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3842 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3843 } 3844 } 3845 } 3846 return new ArrayList<Integer>(thresholds); 3847 } 3848 3849 private void updateSignalStrengthThresholds( 3850 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3851 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3852 Bundle thresholds = new Bundle(); 3853 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3854 3855 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 3856 String detail; 3857 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3858 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3859 } else { 3860 detail = reason; 3861 } 3862 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3863 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3864 } 3865 3866 nai.asyncChannel.sendMessage( 3867 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3868 0, 0, thresholds); 3869 } 3870 3871 @Override 3872 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3873 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3874 final NetworkRequestType type = (networkCapabilities == null) 3875 ? NetworkRequestType.TRACK_DEFAULT 3876 : NetworkRequestType.REQUEST; 3877 // If the requested networkCapabilities is null, take them instead from 3878 // the default network request. This allows callers to keep track of 3879 // the system default network. 3880 if (type == NetworkRequestType.TRACK_DEFAULT) { 3881 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 3882 enforceAccessPermission(); 3883 } else { 3884 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3885 enforceNetworkRequestPermissions(networkCapabilities); 3886 } 3887 enforceMeteredApnPolicy(networkCapabilities); 3888 ensureRequestableCapabilities(networkCapabilities); 3889 3890 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3891 throw new IllegalArgumentException("Bad timeout specified"); 3892 } 3893 3894 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 3895 .equals(networkCapabilities.getNetworkSpecifier())) { 3896 throw new IllegalArgumentException("Invalid network specifier - must not be '" 3897 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 3898 } 3899 3900 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3901 nextNetworkRequestId()); 3902 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, type); 3903 if (DBG) log("requestNetwork for " + nri); 3904 3905 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3906 if (timeoutMs > 0) { 3907 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3908 nri), timeoutMs); 3909 } 3910 return networkRequest; 3911 } 3912 3913 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3914 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 3915 enforceConnectivityInternalPermission(); 3916 } else { 3917 enforceChangePermission(); 3918 } 3919 } 3920 3921 @Override 3922 public boolean requestBandwidthUpdate(Network network) { 3923 enforceAccessPermission(); 3924 NetworkAgentInfo nai = null; 3925 if (network == null) { 3926 return false; 3927 } 3928 synchronized (mNetworkForNetId) { 3929 nai = mNetworkForNetId.get(network.netId); 3930 } 3931 if (nai != null) { 3932 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3933 return true; 3934 } 3935 return false; 3936 } 3937 3938 3939 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3940 // if UID is restricted, don't allow them to bring up metered APNs 3941 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 3942 final int uidRules; 3943 final int uid = Binder.getCallingUid(); 3944 synchronized(mRulesLock) { 3945 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3946 } 3947 if (uidRules != RULE_ALLOW_ALL) { 3948 // we could silently fail or we can filter the available nets to only give 3949 // them those they have access to. Chose the more useful 3950 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 3951 } 3952 } 3953 } 3954 3955 @Override 3956 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3957 PendingIntent operation) { 3958 checkNotNull(operation, "PendingIntent cannot be null."); 3959 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3960 enforceNetworkRequestPermissions(networkCapabilities); 3961 enforceMeteredApnPolicy(networkCapabilities); 3962 ensureRequestableCapabilities(networkCapabilities); 3963 3964 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3965 nextNetworkRequestId()); 3966 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3967 NetworkRequestType.REQUEST); 3968 if (DBG) log("pendingRequest for " + nri); 3969 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3970 nri)); 3971 return networkRequest; 3972 } 3973 3974 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3975 mHandler.sendMessageDelayed( 3976 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3977 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3978 } 3979 3980 @Override 3981 public void releasePendingNetworkRequest(PendingIntent operation) { 3982 checkNotNull(operation, "PendingIntent cannot be null."); 3983 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3984 getCallingUid(), 0, operation)); 3985 } 3986 3987 // In order to implement the compatibility measure for pre-M apps that call 3988 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 3989 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 3990 // This ensures it has permission to do so. 3991 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 3992 if (nc == null) { 3993 return false; 3994 } 3995 int[] transportTypes = nc.getTransportTypes(); 3996 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 3997 return false; 3998 } 3999 try { 4000 mContext.enforceCallingOrSelfPermission( 4001 android.Manifest.permission.ACCESS_WIFI_STATE, 4002 "ConnectivityService"); 4003 } catch (SecurityException e) { 4004 return false; 4005 } 4006 return true; 4007 } 4008 4009 @Override 4010 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4011 Messenger messenger, IBinder binder) { 4012 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4013 enforceAccessPermission(); 4014 } 4015 4016 NetworkRequest networkRequest = new NetworkRequest( 4017 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 4018 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 4019 NetworkRequestType.LISTEN); 4020 if (VDBG) log("listenForNetwork for " + nri); 4021 4022 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4023 return networkRequest; 4024 } 4025 4026 @Override 4027 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4028 PendingIntent operation) { 4029 checkNotNull(operation, "PendingIntent cannot be null."); 4030 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4031 enforceAccessPermission(); 4032 } 4033 4034 NetworkRequest networkRequest = new NetworkRequest( 4035 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 4036 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 4037 NetworkRequestType.LISTEN); 4038 if (VDBG) log("pendingListenForNetwork for " + nri); 4039 4040 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4041 } 4042 4043 @Override 4044 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4045 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 4046 0, networkRequest)); 4047 } 4048 4049 @Override 4050 public void registerNetworkFactory(Messenger messenger, String name) { 4051 enforceConnectivityInternalPermission(); 4052 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4053 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4054 } 4055 4056 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4057 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4058 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4059 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4060 } 4061 4062 @Override 4063 public void unregisterNetworkFactory(Messenger messenger) { 4064 enforceConnectivityInternalPermission(); 4065 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4066 } 4067 4068 private void handleUnregisterNetworkFactory(Messenger messenger) { 4069 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4070 if (nfi == null) { 4071 loge("Failed to find Messenger in unregisterNetworkFactory"); 4072 return; 4073 } 4074 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4075 } 4076 4077 /** 4078 * NetworkAgentInfo supporting a request by requestId. 4079 * These have already been vetted (their Capabilities satisfy the request) 4080 * and the are the highest scored network available. 4081 * the are keyed off the Requests requestId. 4082 */ 4083 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4084 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4085 new SparseArray<NetworkAgentInfo>(); 4086 4087 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4088 @GuardedBy("mNetworkForNetId") 4089 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4090 new SparseArray<NetworkAgentInfo>(); 4091 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4092 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4093 // there may not be a strict 1:1 correlation between the two. 4094 @GuardedBy("mNetworkForNetId") 4095 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4096 4097 // NetworkAgentInfo keyed off its connecting messenger 4098 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4099 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4100 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4101 new HashMap<Messenger, NetworkAgentInfo>(); 4102 4103 @GuardedBy("mBlockedAppUids") 4104 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4105 4106 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4107 private final NetworkRequest mDefaultRequest; 4108 4109 // Request used to optionally keep mobile data active even when higher 4110 // priority networks like Wi-Fi are active. 4111 private final NetworkRequest mDefaultMobileDataRequest; 4112 4113 private NetworkAgentInfo getDefaultNetwork() { 4114 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4115 } 4116 4117 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4118 return nai == getDefaultNetwork(); 4119 } 4120 4121 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4122 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4123 int currentScore, NetworkMisc networkMisc) { 4124 enforceConnectivityInternalPermission(); 4125 4126 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4127 // satisfies mDefaultRequest. 4128 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4129 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4130 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4131 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4132 synchronized (this) { 4133 nai.networkMonitor.systemReady = mSystemReady; 4134 } 4135 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network); 4136 if (DBG) log("registerNetworkAgent " + nai); 4137 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4138 return nai.network.netId; 4139 } 4140 4141 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4142 if (VDBG) log("Got NetworkAgent Messenger"); 4143 mNetworkAgentInfos.put(na.messenger, na); 4144 synchronized (mNetworkForNetId) { 4145 mNetworkForNetId.put(na.network.netId, na); 4146 } 4147 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4148 NetworkInfo networkInfo = na.networkInfo; 4149 na.networkInfo = null; 4150 updateNetworkInfo(na, networkInfo); 4151 } 4152 4153 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4154 LinkProperties newLp = networkAgent.linkProperties; 4155 int netId = networkAgent.network.netId; 4156 4157 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4158 // we do anything else, make sure its LinkProperties are accurate. 4159 if (networkAgent.clatd != null) { 4160 networkAgent.clatd.fixupLinkProperties(oldLp); 4161 } 4162 4163 updateInterfaces(newLp, oldLp, netId); 4164 updateMtu(newLp, oldLp); 4165 // TODO - figure out what to do for clat 4166// for (LinkProperties lp : newLp.getStackedLinks()) { 4167// updateMtu(lp, null); 4168// } 4169 updateTcpBufferSizes(networkAgent); 4170 4171 updateRoutes(newLp, oldLp, netId); 4172 updateDnses(newLp, oldLp, netId); 4173 4174 updateClat(newLp, oldLp, networkAgent); 4175 if (isDefaultNetwork(networkAgent)) { 4176 handleApplyDefaultProxy(newLp.getHttpProxy()); 4177 } else { 4178 updateProxy(newLp, oldLp, networkAgent); 4179 } 4180 // TODO - move this check to cover the whole function 4181 if (!Objects.equals(newLp, oldLp)) { 4182 notifyIfacesChangedForNetworkStats(); 4183 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4184 } 4185 4186 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4187 } 4188 4189 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4190 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4191 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4192 4193 if (!wasRunningClat && shouldRunClat) { 4194 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4195 nai.clatd.start(); 4196 } else if (wasRunningClat && !shouldRunClat) { 4197 nai.clatd.stop(); 4198 } 4199 } 4200 4201 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4202 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4203 if (oldLp != null) { 4204 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4205 } else if (newLp != null) { 4206 interfaceDiff.added = newLp.getAllInterfaceNames(); 4207 } 4208 for (String iface : interfaceDiff.added) { 4209 try { 4210 if (DBG) log("Adding iface " + iface + " to network " + netId); 4211 mNetd.addInterfaceToNetwork(iface, netId); 4212 } catch (Exception e) { 4213 loge("Exception adding interface: " + e); 4214 } 4215 } 4216 for (String iface : interfaceDiff.removed) { 4217 try { 4218 if (DBG) log("Removing iface " + iface + " from network " + netId); 4219 mNetd.removeInterfaceFromNetwork(iface, netId); 4220 } catch (Exception e) { 4221 loge("Exception removing interface: " + e); 4222 } 4223 } 4224 } 4225 4226 /** 4227 * Have netd update routes from oldLp to newLp. 4228 * @return true if routes changed between oldLp and newLp 4229 */ 4230 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4231 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4232 if (oldLp != null) { 4233 routeDiff = oldLp.compareAllRoutes(newLp); 4234 } else if (newLp != null) { 4235 routeDiff.added = newLp.getAllRoutes(); 4236 } 4237 4238 // add routes before removing old in case it helps with continuous connectivity 4239 4240 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4241 for (RouteInfo route : routeDiff.added) { 4242 if (route.hasGateway()) continue; 4243 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4244 try { 4245 mNetd.addRoute(netId, route); 4246 } catch (Exception e) { 4247 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4248 loge("Exception in addRoute for non-gateway: " + e); 4249 } 4250 } 4251 } 4252 for (RouteInfo route : routeDiff.added) { 4253 if (route.hasGateway() == false) continue; 4254 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4255 try { 4256 mNetd.addRoute(netId, route); 4257 } catch (Exception e) { 4258 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4259 loge("Exception in addRoute for gateway: " + e); 4260 } 4261 } 4262 } 4263 4264 for (RouteInfo route : routeDiff.removed) { 4265 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4266 try { 4267 mNetd.removeRoute(netId, route); 4268 } catch (Exception e) { 4269 loge("Exception in removeRoute: " + e); 4270 } 4271 } 4272 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4273 } 4274 4275 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4276 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4277 return; // no updating necessary 4278 } 4279 4280 Collection<InetAddress> dnses = newLp.getDnsServers(); 4281 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4282 try { 4283 mNetd.setDnsServersForNetwork( 4284 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4285 } catch (Exception e) { 4286 loge("Exception in setDnsServersForNetwork: " + e); 4287 } 4288 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4289 if (defaultNai != null && defaultNai.network.netId == netId) { 4290 setDefaultDnsSystemProperties(dnses); 4291 } 4292 flushVmDnsCache(); 4293 } 4294 4295 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4296 int last = 0; 4297 for (InetAddress dns : dnses) { 4298 ++last; 4299 String key = "net.dns" + last; 4300 String value = dns.getHostAddress(); 4301 SystemProperties.set(key, value); 4302 } 4303 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4304 String key = "net.dns" + i; 4305 SystemProperties.set(key, ""); 4306 } 4307 mNumDnsEntries = last; 4308 } 4309 4310 /** 4311 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4312 * augmented with any stateful capabilities implied from {@code networkAgent} 4313 * (e.g., validated status and captive portal status). 4314 * 4315 * @param nai the network having its capabilities updated. 4316 * @param networkCapabilities the new network capabilities. 4317 */ 4318 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4319 // Don't modify caller's NetworkCapabilities. 4320 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4321 if (nai.lastValidated) { 4322 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4323 } else { 4324 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4325 } 4326 if (nai.lastCaptivePortalDetected) { 4327 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4328 } else { 4329 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4330 } 4331 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4332 final int oldScore = nai.getCurrentScore(); 4333 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4334 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4335 try { 4336 mNetd.setNetworkPermission(nai.network.netId, 4337 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4338 null : NetworkManagementService.PERMISSION_SYSTEM); 4339 } catch (RemoteException e) { 4340 loge("Exception in setNetworkPermission: " + e); 4341 } 4342 } 4343 synchronized (nai) { 4344 nai.networkCapabilities = networkCapabilities; 4345 } 4346 rematchAllNetworksAndRequests(nai, oldScore); 4347 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4348 } 4349 } 4350 4351 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4352 for (int i = 0; i < nai.networkRequests.size(); i++) { 4353 NetworkRequest nr = nai.networkRequests.valueAt(i); 4354 // Don't send listening requests to factories. b/17393458 4355 if (!isRequest(nr)) continue; 4356 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4357 } 4358 } 4359 4360 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4361 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4362 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4363 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4364 networkRequest); 4365 } 4366 } 4367 4368 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4369 int notificationType) { 4370 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4371 Intent intent = new Intent(); 4372 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4373 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4374 nri.mPendingIntentSent = true; 4375 sendIntent(nri.mPendingIntent, intent); 4376 } 4377 // else not handled 4378 } 4379 4380 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4381 mPendingIntentWakeLock.acquire(); 4382 try { 4383 if (DBG) log("Sending " + pendingIntent); 4384 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4385 } catch (PendingIntent.CanceledException e) { 4386 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4387 mPendingIntentWakeLock.release(); 4388 releasePendingNetworkRequest(pendingIntent); 4389 } 4390 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4391 } 4392 4393 @Override 4394 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4395 String resultData, Bundle resultExtras) { 4396 if (DBG) log("Finished sending " + pendingIntent); 4397 mPendingIntentWakeLock.release(); 4398 // Release with a delay so the receiving client has an opportunity to put in its 4399 // own request. 4400 releasePendingNetworkRequestWithDelay(pendingIntent); 4401 } 4402 4403 private void callCallbackForRequest(NetworkRequestInfo nri, 4404 NetworkAgentInfo networkAgent, int notificationType) { 4405 if (nri.messenger == null) return; // Default request has no msgr 4406 Bundle bundle = new Bundle(); 4407 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4408 new NetworkRequest(nri.request)); 4409 Message msg = Message.obtain(); 4410 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4411 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4412 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4413 } 4414 switch (notificationType) { 4415 case ConnectivityManager.CALLBACK_LOSING: { 4416 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4417 break; 4418 } 4419 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4420 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4421 new NetworkCapabilities(networkAgent.networkCapabilities)); 4422 break; 4423 } 4424 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4425 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4426 new LinkProperties(networkAgent.linkProperties)); 4427 break; 4428 } 4429 } 4430 msg.what = notificationType; 4431 msg.setData(bundle); 4432 try { 4433 if (VDBG) { 4434 log("sending notification " + notifyTypeToName(notificationType) + 4435 " for " + nri.request); 4436 } 4437 nri.messenger.send(msg); 4438 } catch (RemoteException e) { 4439 // may occur naturally in the race of binder death. 4440 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4441 } 4442 } 4443 4444 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4445 for (int i = 0; i < nai.networkRequests.size(); i++) { 4446 NetworkRequest nr = nai.networkRequests.valueAt(i); 4447 // Ignore listening requests. 4448 if (!isRequest(nr)) continue; 4449 loge("Dead network still had at least " + nr); 4450 break; 4451 } 4452 nai.asyncChannel.disconnect(); 4453 } 4454 4455 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4456 if (oldNetwork == null) { 4457 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4458 return; 4459 } 4460 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4461 teardownUnneededNetwork(oldNetwork); 4462 } 4463 4464 private void makeDefault(NetworkAgentInfo newNetwork, NetworkAgentInfo prevNetwork) { 4465 if (DBG) log("Switching to new default network: " + newNetwork); 4466 setupDataActivityTracking(newNetwork); 4467 try { 4468 mNetd.setDefaultNetId(newNetwork.network.netId); 4469 } catch (Exception e) { 4470 loge("Exception setting default network :" + e); 4471 } 4472 notifyLockdownVpn(newNetwork); 4473 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4474 updateTcpBufferSizes(newNetwork); 4475 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4476 logDefaultNetworkEvent(newNetwork, prevNetwork); 4477 } 4478 4479 // Handles a network appearing or improving its score. 4480 // 4481 // - Evaluates all current NetworkRequests that can be 4482 // satisfied by newNetwork, and reassigns to newNetwork 4483 // any such requests for which newNetwork is the best. 4484 // 4485 // - Lingers any validated Networks that as a result are no longer 4486 // needed. A network is needed if it is the best network for 4487 // one or more NetworkRequests, or if it is a VPN. 4488 // 4489 // - Tears down newNetwork if it just became validated 4490 // but turns out to be unneeded. 4491 // 4492 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4493 // networks that have no chance (i.e. even if validated) 4494 // of becoming the highest scoring network. 4495 // 4496 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4497 // it does not remove NetworkRequests that other Networks could better satisfy. 4498 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4499 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4500 // as it performs better by a factor of the number of Networks. 4501 // 4502 // @param newNetwork is the network to be matched against NetworkRequests. 4503 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4504 // performed to tear down unvalidated networks that have no chance (i.e. even if 4505 // validated) of becoming the highest scoring network. 4506 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4507 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4508 if (!newNetwork.created) return; 4509 boolean keep = newNetwork.isVPN(); 4510 boolean isNewDefault = false; 4511 NetworkAgentInfo oldDefaultNetwork = null; 4512 if (VDBG) log("rematching " + newNetwork.name()); 4513 // Find and migrate to this Network any NetworkRequests for 4514 // which this network is now the best. 4515 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4516 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4517 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4518 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4519 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4520 final boolean satisfies = newNetwork.satisfies(nri.request); 4521 if (newNetwork == currentNetwork && satisfies) { 4522 if (VDBG) { 4523 log("Network " + newNetwork.name() + " was already satisfying" + 4524 " request " + nri.request.requestId + ". No change."); 4525 } 4526 keep = true; 4527 continue; 4528 } 4529 4530 // check if it satisfies the NetworkCapabilities 4531 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4532 if (satisfies) { 4533 if (!nri.isRequest()) { 4534 // This is not a request, it's a callback listener. 4535 // Add it to newNetwork regardless of score. 4536 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4537 continue; 4538 } 4539 4540 // next check if it's better than any current network we're using for 4541 // this request 4542 if (VDBG) { 4543 log("currentScore = " + 4544 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4545 ", newScore = " + newNetwork.getCurrentScore()); 4546 } 4547 if (currentNetwork == null || 4548 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4549 if (VDBG) log("rematch for " + newNetwork.name()); 4550 if (currentNetwork != null) { 4551 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4552 currentNetwork.networkRequests.remove(nri.request.requestId); 4553 currentNetwork.networkLingered.add(nri.request); 4554 affectedNetworks.add(currentNetwork); 4555 } else { 4556 if (VDBG) log(" accepting network in place of null"); 4557 } 4558 unlinger(newNetwork); 4559 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4560 if (!newNetwork.addRequest(nri.request)) { 4561 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4562 } 4563 addedRequests.add(nri); 4564 keep = true; 4565 // Tell NetworkFactories about the new score, so they can stop 4566 // trying to connect if they know they cannot match it. 4567 // TODO - this could get expensive if we have alot of requests for this 4568 // network. Think about if there is a way to reduce this. Push 4569 // netid->request mapping to each factory? 4570 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4571 if (mDefaultRequest.requestId == nri.request.requestId) { 4572 isNewDefault = true; 4573 oldDefaultNetwork = currentNetwork; 4574 } 4575 } 4576 } else if (newNetwork.networkRequests.get(nri.request.requestId) != null) { 4577 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4578 // mark it as no longer satisfying "nri". Because networks are processed by 4579 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4580 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4581 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4582 // This means this code doesn't have to handle the case where "currentNetwork" no 4583 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4584 if (DBG) { 4585 log("Network " + newNetwork.name() + " stopped satisfying" + 4586 " request " + nri.request.requestId); 4587 } 4588 newNetwork.networkRequests.remove(nri.request.requestId); 4589 if (currentNetwork == newNetwork) { 4590 mNetworkForRequestId.remove(nri.request.requestId); 4591 sendUpdatedScoreToFactories(nri.request, 0); 4592 } else { 4593 if (nri.isRequest()) { 4594 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4595 newNetwork.name() + 4596 " without updating mNetworkForRequestId or factories!"); 4597 } 4598 } 4599 // TODO: technically, sending CALLBACK_LOST here is 4600 // incorrect if nri is a request (not a listen) and there 4601 // is a replacement network currently connected that can 4602 // satisfy it. However, the only capability that can both 4603 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4604 // so this code is only incorrect for a network that loses 4605 // the TRUSTED capability, which is a rare case. 4606 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST); 4607 } 4608 } 4609 // Linger any networks that are no longer needed. 4610 for (NetworkAgentInfo nai : affectedNetworks) { 4611 if (nai.lingering) { 4612 // Already lingered. Nothing to do. This can only happen if "nai" is in 4613 // "affectedNetworks" twice. The reasoning being that to get added to 4614 // "affectedNetworks", "nai" must have been satisfying a NetworkRequest 4615 // (i.e. not lingered) so it could have only been lingered by this loop. 4616 // unneeded(nai) will be false and we'll call unlinger() below which would 4617 // be bad, so handle it here. 4618 } else if (unneeded(nai)) { 4619 linger(nai); 4620 } else { 4621 // Clear nai.networkLingered we might have added above. 4622 unlinger(nai); 4623 } 4624 } 4625 if (isNewDefault) { 4626 // Notify system services that this network is up. 4627 makeDefault(newNetwork, oldDefaultNetwork); 4628 synchronized (ConnectivityService.this) { 4629 // have a new default network, release the transition wakelock in 4630 // a second if it's held. The second pause is to allow apps 4631 // to reconnect over the new network 4632 if (mNetTransitionWakeLock.isHeld()) { 4633 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4634 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4635 mNetTransitionWakeLockSerialNumber, 0), 4636 1000); 4637 } 4638 } 4639 } 4640 4641 // do this after the default net is switched, but 4642 // before LegacyTypeTracker sends legacy broadcasts 4643 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4644 4645 if (isNewDefault) { 4646 // Maintain the illusion: since the legacy API only 4647 // understands one network at a time, we must pretend 4648 // that the current default network disconnected before 4649 // the new one connected. 4650 if (oldDefaultNetwork != null) { 4651 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4652 oldDefaultNetwork, true); 4653 } 4654 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4655 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4656 notifyLockdownVpn(newNetwork); 4657 } 4658 4659 if (keep) { 4660 // Notify battery stats service about this network, both the normal 4661 // interface and any stacked links. 4662 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4663 try { 4664 final IBatteryStats bs = BatteryStatsService.getService(); 4665 final int type = newNetwork.networkInfo.getType(); 4666 4667 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4668 bs.noteNetworkInterfaceType(baseIface, type); 4669 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4670 final String stackedIface = stacked.getInterfaceName(); 4671 bs.noteNetworkInterfaceType(stackedIface, type); 4672 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4673 } 4674 } catch (RemoteException ignored) { 4675 } 4676 4677 // This has to happen after the notifyNetworkCallbacks as that tickles each 4678 // ConnectivityManager instance so that legacy requests correctly bind dns 4679 // requests to this network. The legacy users are listening for this bcast 4680 // and will generally do a dns request so they can ensureRouteToHost and if 4681 // they do that before the callbacks happen they'll use the default network. 4682 // 4683 // TODO: Is there still a race here? We send the broadcast 4684 // after sending the callback, but if the app can receive the 4685 // broadcast before the callback, it might still break. 4686 // 4687 // This *does* introduce a race where if the user uses the new api 4688 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4689 // they may get old info. Reverse this after the old startUsing api is removed. 4690 // This is on top of the multiple intent sequencing referenced in the todo above. 4691 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4692 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4693 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4694 // legacy type tracker filters out repeat adds 4695 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4696 } 4697 } 4698 4699 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4700 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4701 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4702 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4703 if (newNetwork.isVPN()) { 4704 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4705 } 4706 } 4707 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4708 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4709 if (unneeded(nai)) { 4710 if (DBG) log("Reaping " + nai.name()); 4711 teardownUnneededNetwork(nai); 4712 } 4713 } 4714 } 4715 } 4716 4717 /** 4718 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4719 * being disconnected. 4720 * @param changed If only one Network's score or capabilities have been modified since the last 4721 * time this function was called, pass this Network in this argument, otherwise pass 4722 * null. 4723 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4724 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4725 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4726 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4727 * network's score. 4728 */ 4729 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4730 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4731 // to avoid the slowness. It is not simply enough to process just "changed", for 4732 // example in the case where "changed"'s score decreases and another network should begin 4733 // satifying a NetworkRequest that "changed" currently satisfies. 4734 4735 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4736 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4737 // rematchNetworkAndRequests() handles. 4738 if (changed != null && oldScore < changed.getCurrentScore()) { 4739 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP); 4740 } else { 4741 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4742 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4743 // Rematch higher scoring networks first to prevent requests first matching a lower 4744 // scoring network and then a higher scoring network, which could produce multiple 4745 // callbacks and inadvertently unlinger networks. 4746 Arrays.sort(nais); 4747 for (NetworkAgentInfo nai : nais) { 4748 rematchNetworkAndRequests(nai, 4749 // Only reap the last time through the loop. Reaping before all rematching 4750 // is complete could incorrectly teardown a network that hasn't yet been 4751 // rematched. 4752 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4753 : ReapUnvalidatedNetworks.REAP); 4754 } 4755 } 4756 } 4757 4758 private void updateInetCondition(NetworkAgentInfo nai) { 4759 // Don't bother updating until we've graduated to validated at least once. 4760 if (!nai.everValidated) return; 4761 // For now only update icons for default connection. 4762 // TODO: Update WiFi and cellular icons separately. b/17237507 4763 if (!isDefaultNetwork(nai)) return; 4764 4765 int newInetCondition = nai.lastValidated ? 100 : 0; 4766 // Don't repeat publish. 4767 if (newInetCondition == mDefaultInetConditionPublished) return; 4768 4769 mDefaultInetConditionPublished = newInetCondition; 4770 sendInetConditionBroadcast(nai.networkInfo); 4771 } 4772 4773 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4774 if (mLockdownTracker != null) { 4775 if (nai != null && nai.isVPN()) { 4776 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4777 } else { 4778 mLockdownTracker.onNetworkInfoChanged(); 4779 } 4780 } 4781 } 4782 4783 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4784 NetworkInfo.State state = newInfo.getState(); 4785 NetworkInfo oldInfo = null; 4786 final int oldScore = networkAgent.getCurrentScore(); 4787 synchronized (networkAgent) { 4788 oldInfo = networkAgent.networkInfo; 4789 networkAgent.networkInfo = newInfo; 4790 } 4791 notifyLockdownVpn(networkAgent); 4792 4793 if (oldInfo != null && oldInfo.getState() == state) { 4794 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 4795 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 4796 notifyIfacesChangedForNetworkStats(); 4797 } else if (VDBG) log("ignoring duplicate network state non-change"); 4798 // In either case, no further work should be needed. 4799 return; 4800 } 4801 if (DBG) { 4802 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4803 (oldInfo == null ? "null" : oldInfo.getState()) + 4804 " to " + state); 4805 } 4806 4807 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4808 try { 4809 // This should never fail. Specifying an already in use NetID will cause failure. 4810 if (networkAgent.isVPN()) { 4811 mNetd.createVirtualNetwork(networkAgent.network.netId, 4812 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4813 (networkAgent.networkMisc == null || 4814 !networkAgent.networkMisc.allowBypass)); 4815 } else { 4816 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4817 networkAgent.networkCapabilities.hasCapability( 4818 NET_CAPABILITY_NOT_RESTRICTED) ? 4819 null : NetworkManagementService.PERMISSION_SYSTEM); 4820 } 4821 } catch (Exception e) { 4822 loge("Error creating network " + networkAgent.network.netId + ": " 4823 + e.getMessage()); 4824 return; 4825 } 4826 networkAgent.created = true; 4827 updateLinkProperties(networkAgent, null); 4828 notifyIfacesChangedForNetworkStats(); 4829 4830 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4831 scheduleUnvalidatedPrompt(networkAgent); 4832 4833 if (networkAgent.isVPN()) { 4834 // Temporarily disable the default proxy (not global). 4835 synchronized (mProxyLock) { 4836 if (!mDefaultProxyDisabled) { 4837 mDefaultProxyDisabled = true; 4838 if (mGlobalProxy == null && mDefaultProxy != null) { 4839 sendProxyBroadcast(null); 4840 } 4841 } 4842 } 4843 // TODO: support proxy per network. 4844 } 4845 4846 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 4847 // be communicated to a particular NetworkAgent depends only on the network's immutable, 4848 // capabilities, so it only needs to be done once on initial connect, not every time the 4849 // network's capabilities change. Note that we do this before rematching the network, 4850 // so we could decide to tear it down immediately afterwards. That's fine though - on 4851 // disconnection NetworkAgents should stop any signal strength monitoring they have been 4852 // doing. 4853 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 4854 4855 // Consider network even though it is not yet validated. 4856 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP); 4857 4858 // This has to happen after matching the requests, because callbacks are just requests. 4859 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4860 } else if (state == NetworkInfo.State.DISCONNECTED) { 4861 networkAgent.asyncChannel.disconnect(); 4862 if (networkAgent.isVPN()) { 4863 synchronized (mProxyLock) { 4864 if (mDefaultProxyDisabled) { 4865 mDefaultProxyDisabled = false; 4866 if (mGlobalProxy == null && mDefaultProxy != null) { 4867 sendProxyBroadcast(mDefaultProxy); 4868 } 4869 } 4870 } 4871 } 4872 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 4873 state == NetworkInfo.State.SUSPENDED) { 4874 // going into or coming out of SUSPEND: rescore and notify 4875 if (networkAgent.getCurrentScore() != oldScore) { 4876 rematchAllNetworksAndRequests(networkAgent, oldScore); 4877 } 4878 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 4879 ConnectivityManager.CALLBACK_SUSPENDED : 4880 ConnectivityManager.CALLBACK_RESUMED)); 4881 mLegacyTypeTracker.update(networkAgent); 4882 } 4883 } 4884 4885 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4886 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4887 if (score < 0) { 4888 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4889 "). Bumping score to min of 0"); 4890 score = 0; 4891 } 4892 4893 final int oldScore = nai.getCurrentScore(); 4894 nai.setCurrentScore(score); 4895 4896 rematchAllNetworksAndRequests(nai, oldScore); 4897 4898 sendUpdatedScoreToFactories(nai); 4899 } 4900 4901 // notify only this one new request of the current state 4902 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4903 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4904 // TODO - read state from monitor to decide what to send. 4905// if (nai.networkMonitor.isLingering()) { 4906// notifyType = NetworkCallbacks.LOSING; 4907// } else if (nai.networkMonitor.isEvaluating()) { 4908// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4909// } 4910 if (nri.mPendingIntent == null) { 4911 callCallbackForRequest(nri, nai, notifyType); 4912 } else { 4913 sendPendingIntentForRequest(nri, nai, notifyType); 4914 } 4915 } 4916 4917 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 4918 // The NetworkInfo we actually send out has no bearing on the real 4919 // state of affairs. For example, if the default connection is mobile, 4920 // and a request for HIPRI has just gone away, we need to pretend that 4921 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4922 // the state to DISCONNECTED, even though the network is of type MOBILE 4923 // and is still connected. 4924 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4925 info.setType(type); 4926 if (state != DetailedState.DISCONNECTED) { 4927 info.setDetailedState(state, null, info.getExtraInfo()); 4928 sendConnectedBroadcast(info); 4929 } else { 4930 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 4931 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4932 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4933 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4934 if (info.isFailover()) { 4935 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4936 nai.networkInfo.setFailover(false); 4937 } 4938 if (info.getReason() != null) { 4939 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4940 } 4941 if (info.getExtraInfo() != null) { 4942 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4943 } 4944 NetworkAgentInfo newDefaultAgent = null; 4945 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4946 newDefaultAgent = getDefaultNetwork(); 4947 if (newDefaultAgent != null) { 4948 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4949 newDefaultAgent.networkInfo); 4950 } else { 4951 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4952 } 4953 } 4954 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4955 mDefaultInetConditionPublished); 4956 sendStickyBroadcast(intent); 4957 if (newDefaultAgent != null) { 4958 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4959 } 4960 } 4961 } 4962 4963 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4964 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4965 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4966 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4967 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4968 if (VDBG) log(" sending notification for " + nr); 4969 if (nri.mPendingIntent == null) { 4970 callCallbackForRequest(nri, networkAgent, notifyType); 4971 } else { 4972 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4973 } 4974 } 4975 } 4976 4977 private String notifyTypeToName(int notifyType) { 4978 switch (notifyType) { 4979 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4980 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4981 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4982 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4983 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4984 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4985 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4986 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4987 } 4988 return "UNKNOWN"; 4989 } 4990 4991 /** 4992 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 4993 * properties tracked by NetworkStatsService on an active iface has changed. 4994 */ 4995 private void notifyIfacesChangedForNetworkStats() { 4996 try { 4997 mStatsService.forceUpdateIfaces(); 4998 } catch (Exception ignored) { 4999 } 5000 } 5001 5002 @Override 5003 public boolean addVpnAddress(String address, int prefixLength) { 5004 throwIfLockdownEnabled(); 5005 int user = UserHandle.getUserId(Binder.getCallingUid()); 5006 synchronized (mVpns) { 5007 return mVpns.get(user).addAddress(address, prefixLength); 5008 } 5009 } 5010 5011 @Override 5012 public boolean removeVpnAddress(String address, int prefixLength) { 5013 throwIfLockdownEnabled(); 5014 int user = UserHandle.getUserId(Binder.getCallingUid()); 5015 synchronized (mVpns) { 5016 return mVpns.get(user).removeAddress(address, prefixLength); 5017 } 5018 } 5019 5020 @Override 5021 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5022 throwIfLockdownEnabled(); 5023 int user = UserHandle.getUserId(Binder.getCallingUid()); 5024 boolean success; 5025 synchronized (mVpns) { 5026 success = mVpns.get(user).setUnderlyingNetworks(networks); 5027 } 5028 if (success) { 5029 notifyIfacesChangedForNetworkStats(); 5030 } 5031 return success; 5032 } 5033 5034 @Override 5035 public String getCaptivePortalServerUrl() { 5036 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5037 } 5038 5039 @Override 5040 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5041 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5042 enforceKeepalivePermission(); 5043 mKeepaliveTracker.startNattKeepalive( 5044 getNetworkAgentInfoForNetwork(network), 5045 intervalSeconds, messenger, binder, 5046 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5047 } 5048 5049 @Override 5050 public void stopKeepalive(Network network, int slot) { 5051 mHandler.sendMessage(mHandler.obtainMessage( 5052 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5053 } 5054 5055 @Override 5056 public void factoryReset() { 5057 enforceConnectivityInternalPermission(); 5058 5059 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5060 return; 5061 } 5062 5063 final int userId = UserHandle.getCallingUserId(); 5064 5065 // Turn airplane mode off 5066 setAirplaneMode(false); 5067 5068 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5069 // Untether 5070 for (String tether : getTetheredIfaces()) { 5071 untether(tether); 5072 } 5073 } 5074 5075 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5076 // Turn VPN off 5077 VpnConfig vpnConfig = getVpnConfig(userId); 5078 if (vpnConfig != null) { 5079 if (vpnConfig.legacy) { 5080 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5081 } else { 5082 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5083 // in the future without user intervention. 5084 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5085 5086 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN, userId); 5087 } 5088 } 5089 } 5090 } 5091 5092 @VisibleForTesting 5093 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5094 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5095 return new NetworkMonitor(context, handler, nai, defaultRequest); 5096 } 5097 5098 private static void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5099 int newNetid = NETID_UNSET; 5100 int prevNetid = NETID_UNSET; 5101 int[] transports = new int[0]; 5102 boolean hadIPv4 = false; 5103 boolean hadIPv6 = false; 5104 5105 if (newNai != null) { 5106 newNetid = newNai.network.netId; 5107 transports = newNai.networkCapabilities.getTransportTypes(); 5108 } 5109 if (prevNai != null) { 5110 prevNetid = prevNai.network.netId; 5111 final LinkProperties lp = prevNai.linkProperties; 5112 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5113 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5114 } 5115 5116 DefaultNetworkEvent.logEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6); 5117 } 5118} 5119