ConnectivityService.java revision aa281e2bc054cfccaef80eb48342382e79dfeaba
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 31import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 32import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 33import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 34 35import android.annotation.Nullable; 36import android.app.AlarmManager; 37import android.app.Notification; 38import android.app.NotificationManager; 39import android.app.PendingIntent; 40import android.content.BroadcastReceiver; 41import android.content.ContentResolver; 42import android.content.Context; 43import android.content.Intent; 44import android.content.IntentFilter; 45import android.content.pm.PackageManager; 46import android.content.res.Configuration; 47import android.content.res.Resources; 48import android.database.ContentObserver; 49import android.net.ConnectivityManager; 50import android.net.ConnectivityManager.PacketKeepalive; 51import android.net.IConnectivityManager; 52import android.net.INetworkManagementEventObserver; 53import android.net.INetworkPolicyListener; 54import android.net.INetworkPolicyManager; 55import android.net.INetworkStatsService; 56import android.net.LinkProperties; 57import android.net.LinkProperties.CompareResult; 58import android.net.Network; 59import android.net.NetworkAgent; 60import android.net.NetworkCapabilities; 61import android.net.NetworkConfig; 62import android.net.NetworkInfo; 63import android.net.NetworkInfo.DetailedState; 64import android.net.NetworkMisc; 65import android.net.NetworkQuotaInfo; 66import android.net.NetworkRequest; 67import android.net.NetworkState; 68import android.net.NetworkUtils; 69import android.net.Proxy; 70import android.net.ProxyInfo; 71import android.net.RouteInfo; 72import android.net.UidRange; 73import android.net.Uri; 74import android.os.Binder; 75import android.os.Bundle; 76import android.os.FileUtils; 77import android.os.Handler; 78import android.os.HandlerThread; 79import android.os.IBinder; 80import android.os.INetworkManagementService; 81import android.os.Looper; 82import android.os.Message; 83import android.os.Messenger; 84import android.os.ParcelFileDescriptor; 85import android.os.PowerManager; 86import android.os.Process; 87import android.os.RemoteException; 88import android.os.SystemClock; 89import android.os.SystemProperties; 90import android.os.UserHandle; 91import android.os.UserManager; 92import android.provider.Settings; 93import android.security.Credentials; 94import android.security.KeyStore; 95import android.telephony.TelephonyManager; 96import android.text.TextUtils; 97import android.util.LocalLog; 98import android.util.LocalLog.ReadOnlyLocalLog; 99import android.util.Pair; 100import android.util.Slog; 101import android.util.SparseArray; 102import android.util.SparseBooleanArray; 103import android.util.SparseIntArray; 104import android.util.Xml; 105 106import com.android.internal.R; 107import com.android.internal.annotations.GuardedBy; 108import com.android.internal.annotations.VisibleForTesting; 109import com.android.internal.app.IBatteryStats; 110import com.android.internal.net.LegacyVpnInfo; 111import com.android.internal.net.NetworkStatsFactory; 112import com.android.internal.net.VpnConfig; 113import com.android.internal.net.VpnInfo; 114import com.android.internal.net.VpnProfile; 115import com.android.internal.telephony.DctConstants; 116import com.android.internal.util.AsyncChannel; 117import com.android.internal.util.IndentingPrintWriter; 118import com.android.internal.util.XmlUtils; 119import com.android.server.am.BatteryStatsService; 120import com.android.server.connectivity.DataConnectionStats; 121import com.android.server.connectivity.KeepaliveTracker; 122import com.android.server.connectivity.NetworkDiagnostics; 123import com.android.server.connectivity.Nat464Xlat; 124import com.android.server.connectivity.NetworkAgentInfo; 125import com.android.server.connectivity.NetworkMonitor; 126import com.android.server.connectivity.PacManager; 127import com.android.server.connectivity.PermissionMonitor; 128import com.android.server.connectivity.Tethering; 129import com.android.server.connectivity.Vpn; 130import com.android.server.net.BaseNetworkObserver; 131import com.android.server.net.LockdownVpnTracker; 132import com.google.android.collect.Lists; 133import com.google.android.collect.Sets; 134 135import org.xmlpull.v1.XmlPullParser; 136import org.xmlpull.v1.XmlPullParserException; 137 138import java.io.File; 139import java.io.FileDescriptor; 140import java.io.FileNotFoundException; 141import java.io.FileReader; 142import java.io.IOException; 143import java.io.PrintWriter; 144import java.net.Inet4Address; 145import java.net.InetAddress; 146import java.net.UnknownHostException; 147import java.util.ArrayDeque; 148import java.util.ArrayList; 149import java.util.Arrays; 150import java.util.Collection; 151import java.util.HashMap; 152import java.util.HashSet; 153import java.util.SortedSet; 154import java.util.TreeSet; 155import java.util.Iterator; 156import java.util.List; 157import java.util.Map; 158import java.util.Objects; 159import java.util.concurrent.atomic.AtomicInteger; 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; 172 173 // TODO: create better separation between radio types and network types 174 175 // how long to wait before switching back to a radio's default network 176 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 177 // system property that can override the above value 178 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 179 "android.telephony.apn-restore"; 180 181 // How long to wait before putting up a "This network doesn't have an Internet connection, 182 // connect anyway?" dialog after the user selects a network that doesn't validate. 183 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 184 185 // How long to delay to removal of a pending intent based request. 186 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 187 private final int mReleasePendingIntentDelayMs; 188 189 private Tethering mTethering; 190 191 private final PermissionMonitor mPermissionMonitor; 192 193 private KeyStore mKeyStore; 194 195 @GuardedBy("mVpns") 196 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 197 198 private boolean mLockdownEnabled; 199 private LockdownVpnTracker mLockdownTracker; 200 201 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 202 private Object mRulesLock = new Object(); 203 /** Currently active network rules by UID. */ 204 private SparseIntArray mUidRules = new SparseIntArray(); 205 /** Set of ifaces that are costly. */ 206 private HashSet<String> mMeteredIfaces = Sets.newHashSet(); 207 208 final private Context mContext; 209 private int mNetworkPreference; 210 // 0 is full bad, 100 is full good 211 private int mDefaultInetConditionPublished = 0; 212 213 private int mNumDnsEntries; 214 215 private boolean mTestMode; 216 private static ConnectivityService sServiceInstance; 217 218 private INetworkManagementService mNetd; 219 private INetworkStatsService mStatsService; 220 private INetworkPolicyManager mPolicyManager; 221 222 private String mCurrentTcpBufferSizes; 223 224 private static final int ENABLED = 1; 225 private static final int DISABLED = 0; 226 227 private enum ReapUnvalidatedNetworks { 228 // Tear down networks that have no chance (e.g. even if validated) of becoming 229 // the highest scoring network satisfying a NetworkRequest. This should be passed when 230 // all networks have been rematched against all NetworkRequests. 231 REAP, 232 // Don't reap networks. This should be passed when some networks have not yet been 233 // rematched against all NetworkRequests. 234 DONT_REAP 235 }; 236 237 /** 238 * used internally to change our mobile data enabled flag 239 */ 240 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 241 242 /** 243 * used internally to clear a wakelock when transitioning 244 * from one net to another. Clear happens when we get a new 245 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 246 * after a timeout if no network is found (typically 1 min). 247 */ 248 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 249 250 /** 251 * used internally to reload global proxy settings 252 */ 253 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 254 255 /** 256 * used internally to send a sticky broadcast delayed. 257 */ 258 private static final int EVENT_SEND_STICKY_BROADCAST_INTENT = 11; 259 260 /** 261 * PAC manager has received new port. 262 */ 263 private static final int EVENT_PROXY_HAS_CHANGED = 16; 264 265 /** 266 * used internally when registering NetworkFactories 267 * obj = NetworkFactoryInfo 268 */ 269 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 270 271 /** 272 * used internally when registering NetworkAgents 273 * obj = Messenger 274 */ 275 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 276 277 /** 278 * used to add a network request 279 * includes a NetworkRequestInfo 280 */ 281 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 282 283 /** 284 * indicates a timeout period is over - check if we had a network yet or not 285 * and if not, call the timeout calback (but leave the request live until they 286 * cancel it. 287 * includes a NetworkRequestInfo 288 */ 289 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 290 291 /** 292 * used to add a network listener - no request 293 * includes a NetworkRequestInfo 294 */ 295 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 296 297 /** 298 * used to remove a network request, either a listener or a real request 299 * arg1 = UID of caller 300 * obj = NetworkRequest 301 */ 302 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 303 304 /** 305 * used internally when registering NetworkFactories 306 * obj = Messenger 307 */ 308 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 309 310 /** 311 * used internally to expire a wakelock when transitioning 312 * from one net to another. Expire happens when we fail to find 313 * a new network (typically after 1 minute) - 314 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 315 * a replacement network. 316 */ 317 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 318 319 /** 320 * Used internally to indicate the system is ready. 321 */ 322 private static final int EVENT_SYSTEM_READY = 25; 323 324 /** 325 * used to add a network request with a pending intent 326 * obj = NetworkRequestInfo 327 */ 328 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 329 330 /** 331 * used to remove a pending intent and its associated network request. 332 * arg1 = UID of caller 333 * obj = PendingIntent 334 */ 335 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 336 337 /** 338 * used to specify whether a network should be used even if unvalidated. 339 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 340 * arg2 = whether to remember this choice in the future (1 or 0) 341 * obj = network 342 */ 343 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 344 345 /** 346 * used to ask the user to confirm a connection to an unvalidated network. 347 * obj = network 348 */ 349 private static final int EVENT_PROMPT_UNVALIDATED = 29; 350 351 /** 352 * used internally to (re)configure mobile data always-on settings. 353 */ 354 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 355 356 /** 357 * used to add a network listener with a pending intent 358 * obj = NetworkRequestInfo 359 */ 360 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 361 362 /** Handler thread used for both of the handlers below. */ 363 @VisibleForTesting 364 protected final HandlerThread mHandlerThread; 365 /** Handler used for internal events. */ 366 final private InternalHandler mHandler; 367 /** Handler used for incoming {@link NetworkStateTracker} events. */ 368 final private NetworkStateTrackerHandler mTrackerHandler; 369 370 private boolean mSystemReady; 371 private Intent mInitialBroadcast; 372 373 private PowerManager.WakeLock mNetTransitionWakeLock; 374 private String mNetTransitionWakeLockCausedBy = ""; 375 private int mNetTransitionWakeLockSerialNumber; 376 private int mNetTransitionWakeLockTimeout; 377 private final PowerManager.WakeLock mPendingIntentWakeLock; 378 379 private InetAddress mDefaultDns; 380 381 // used in DBG mode to track inet condition reports 382 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 383 private ArrayList mInetLog; 384 385 // track the current default http proxy - tell the world if we get a new one (real change) 386 private volatile ProxyInfo mDefaultProxy = null; 387 private Object mProxyLock = new Object(); 388 private boolean mDefaultProxyDisabled = false; 389 390 // track the global proxy. 391 private ProxyInfo mGlobalProxy = null; 392 393 private PacManager mPacManager = null; 394 395 final private SettingsObserver mSettingsObserver; 396 397 private UserManager mUserManager; 398 399 NetworkConfig[] mNetConfigs; 400 int mNetworksDefined; 401 402 // the set of network types that can only be enabled by system/sig apps 403 List mProtectedNetworks; 404 405 private DataConnectionStats mDataConnectionStats; 406 407 TelephonyManager mTelephonyManager; 408 409 private KeepaliveTracker mKeepaliveTracker; 410 411 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 412 private final static int MIN_NET_ID = 100; // some reserved marks 413 private final static int MAX_NET_ID = 65535; 414 private int mNextNetId = MIN_NET_ID; 415 416 // sequence number of NetworkRequests 417 private int mNextNetworkRequestId = 1; 418 419 // NetworkRequest activity String log entries. 420 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 421 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 422 423 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 424 private static final int MAX_VALIDATION_LOGS = 10; 425 private final ArrayDeque<Pair<Network,ReadOnlyLocalLog>> mValidationLogs = 426 new ArrayDeque<Pair<Network,ReadOnlyLocalLog>>(MAX_VALIDATION_LOGS); 427 428 private void addValidationLogs(ReadOnlyLocalLog log, Network network) { 429 synchronized(mValidationLogs) { 430 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 431 mValidationLogs.removeLast(); 432 } 433 mValidationLogs.addFirst(new Pair(network, log)); 434 } 435 } 436 437 /** 438 * Implements support for the legacy "one network per network type" model. 439 * 440 * We used to have a static array of NetworkStateTrackers, one for each 441 * network type, but that doesn't work any more now that we can have, 442 * for example, more that one wifi network. This class stores all the 443 * NetworkAgentInfo objects that support a given type, but the legacy 444 * API will only see the first one. 445 * 446 * It serves two main purposes: 447 * 448 * 1. Provide information about "the network for a given type" (since this 449 * API only supports one). 450 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 451 * the first network for a given type changes, or if the default network 452 * changes. 453 */ 454 private class LegacyTypeTracker { 455 456 private static final boolean DBG = true; 457 private static final boolean VDBG = false; 458 private static final String TAG = "CSLegacyTypeTracker"; 459 460 /** 461 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 462 * Each list holds references to all NetworkAgentInfos that are used to 463 * satisfy requests for that network type. 464 * 465 * This array is built out at startup such that an unsupported network 466 * doesn't get an ArrayList instance, making this a tristate: 467 * unsupported, supported but not active and active. 468 * 469 * The actual lists are populated when we scan the network types that 470 * are supported on this device. 471 */ 472 private ArrayList<NetworkAgentInfo> mTypeLists[]; 473 474 public LegacyTypeTracker() { 475 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 476 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 477 } 478 479 public void addSupportedType(int type) { 480 if (mTypeLists[type] != null) { 481 throw new IllegalStateException( 482 "legacy list for type " + type + "already initialized"); 483 } 484 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 485 } 486 487 public boolean isTypeSupported(int type) { 488 return isNetworkTypeValid(type) && mTypeLists[type] != null; 489 } 490 491 public NetworkAgentInfo getNetworkForType(int type) { 492 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 493 return mTypeLists[type].get(0); 494 } else { 495 return null; 496 } 497 } 498 499 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 500 boolean isDefaultNetwork) { 501 if (DBG) { 502 log("Sending " + state + 503 " broadcast for type " + type + " " + nai.name() + 504 " isDefaultNetwork=" + isDefaultNetwork); 505 } 506 } 507 508 /** Adds the given network to the specified legacy type list. */ 509 public void add(int type, NetworkAgentInfo nai) { 510 if (!isTypeSupported(type)) { 511 return; // Invalid network type. 512 } 513 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 514 515 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 516 if (list.contains(nai)) { 517 return; 518 } 519 520 list.add(nai); 521 522 // Send a broadcast if this is the first network of its type or if it's the default. 523 final boolean isDefaultNetwork = isDefaultNetwork(nai); 524 if (list.size() == 1 || isDefaultNetwork) { 525 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 526 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 527 } 528 } 529 530 /** Removes the given network from the specified legacy type list. */ 531 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 532 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 533 if (list == null || list.isEmpty()) { 534 return; 535 } 536 537 final boolean wasFirstNetwork = list.get(0).equals(nai); 538 539 if (!list.remove(nai)) { 540 return; 541 } 542 543 final DetailedState state = DetailedState.DISCONNECTED; 544 545 if (wasFirstNetwork || wasDefault) { 546 maybeLogBroadcast(nai, state, type, wasDefault); 547 sendLegacyNetworkBroadcast(nai, state, type); 548 } 549 550 if (!list.isEmpty() && wasFirstNetwork) { 551 if (DBG) log("Other network available for type " + type + 552 ", sending connected broadcast"); 553 final NetworkAgentInfo replacement = list.get(0); 554 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 555 sendLegacyNetworkBroadcast(replacement, state, type); 556 } 557 } 558 559 /** Removes the given network from all legacy type lists. */ 560 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 561 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 562 for (int type = 0; type < mTypeLists.length; type++) { 563 remove(type, nai, wasDefault); 564 } 565 } 566 567 // send out another legacy broadcast - currently only used for suspend/unsuspend 568 // toggle 569 public void update(NetworkAgentInfo nai) { 570 final boolean isDefault = isDefaultNetwork(nai); 571 final DetailedState state = nai.networkInfo.getDetailedState(); 572 for (int type = 0; type < mTypeLists.length; type++) { 573 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 574 final boolean contains = (list != null && list.contains(nai)); 575 final boolean isFirst = (list != null && list.size() > 0 && nai == list.get(0)); 576 if (isFirst || (contains && isDefault)) { 577 maybeLogBroadcast(nai, state, type, isDefault); 578 sendLegacyNetworkBroadcast(nai, state, type); 579 } 580 } 581 } 582 583 private String naiToString(NetworkAgentInfo nai) { 584 String name = (nai != null) ? nai.name() : "null"; 585 String state = (nai.networkInfo != null) ? 586 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 587 "???/???"; 588 return name + " " + state; 589 } 590 591 public void dump(IndentingPrintWriter pw) { 592 pw.println("mLegacyTypeTracker:"); 593 pw.increaseIndent(); 594 pw.print("Supported types:"); 595 for (int type = 0; type < mTypeLists.length; type++) { 596 if (mTypeLists[type] != null) pw.print(" " + type); 597 } 598 pw.println(); 599 pw.println("Current state:"); 600 pw.increaseIndent(); 601 for (int type = 0; type < mTypeLists.length; type++) { 602 if (mTypeLists[type] == null|| mTypeLists[type].size() == 0) continue; 603 for (NetworkAgentInfo nai : mTypeLists[type]) { 604 pw.println(type + " " + naiToString(nai)); 605 } 606 } 607 pw.decreaseIndent(); 608 pw.decreaseIndent(); 609 pw.println(); 610 } 611 612 // This class needs its own log method because it has a different TAG. 613 private void log(String s) { 614 Slog.d(TAG, s); 615 } 616 617 } 618 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 619 620 @VisibleForTesting 621 protected HandlerThread createHandlerThread() { 622 return new HandlerThread("ConnectivityServiceThread"); 623 } 624 625 public ConnectivityService(Context context, INetworkManagementService netManager, 626 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 627 if (DBG) log("ConnectivityService starting up"); 628 629 mDefaultRequest = createInternetRequestForTransport(-1); 630 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, 631 new Binder(), NetworkRequestInfo.REQUEST); 632 mNetworkRequests.put(mDefaultRequest, defaultNRI); 633 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 634 635 mDefaultMobileDataRequest = createInternetRequestForTransport( 636 NetworkCapabilities.TRANSPORT_CELLULAR); 637 638 mHandlerThread = createHandlerThread(); 639 mHandlerThread.start(); 640 mHandler = new InternalHandler(mHandlerThread.getLooper()); 641 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 642 643 // setup our unique device name 644 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 645 String id = Settings.Secure.getString(context.getContentResolver(), 646 Settings.Secure.ANDROID_ID); 647 if (id != null && id.length() > 0) { 648 String name = new String("android-").concat(id); 649 SystemProperties.set("net.hostname", name); 650 } 651 } 652 653 // read our default dns server ip 654 String dns = Settings.Global.getString(context.getContentResolver(), 655 Settings.Global.DEFAULT_DNS_SERVER); 656 if (dns == null || dns.length() == 0) { 657 dns = context.getResources().getString( 658 com.android.internal.R.string.config_default_dns_server); 659 } 660 try { 661 mDefaultDns = NetworkUtils.numericToInetAddress(dns); 662 } catch (IllegalArgumentException e) { 663 loge("Error setting defaultDns using " + dns); 664 } 665 666 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 667 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 668 669 mContext = checkNotNull(context, "missing Context"); 670 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 671 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 672 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 673 mKeyStore = KeyStore.getInstance(); 674 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 675 676 try { 677 mPolicyManager.registerListener(mPolicyListener); 678 } catch (RemoteException e) { 679 // ouch, no rules updates means some processes may never get network 680 loge("unable to register INetworkPolicyListener" + e.toString()); 681 } 682 683 final PowerManager powerManager = (PowerManager) context.getSystemService( 684 Context.POWER_SERVICE); 685 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 686 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 687 com.android.internal.R.integer.config_networkTransitionTimeout); 688 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 689 690 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 691 692 // TODO: What is the "correct" way to do determine if this is a wifi only device? 693 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 694 log("wifiOnly=" + wifiOnly); 695 String[] naStrings = context.getResources().getStringArray( 696 com.android.internal.R.array.networkAttributes); 697 for (String naString : naStrings) { 698 try { 699 NetworkConfig n = new NetworkConfig(naString); 700 if (VDBG) log("naString=" + naString + " config=" + n); 701 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 702 loge("Error in networkAttributes - ignoring attempt to define type " + 703 n.type); 704 continue; 705 } 706 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 707 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 708 n.type); 709 continue; 710 } 711 if (mNetConfigs[n.type] != null) { 712 loge("Error in networkAttributes - ignoring attempt to redefine type " + 713 n.type); 714 continue; 715 } 716 mLegacyTypeTracker.addSupportedType(n.type); 717 718 mNetConfigs[n.type] = n; 719 mNetworksDefined++; 720 } catch(Exception e) { 721 // ignore it - leave the entry null 722 } 723 } 724 725 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 726 if (mNetConfigs[TYPE_VPN] == null) { 727 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 728 // don't need to add TYPE_VPN to mNetConfigs. 729 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 730 mNetworksDefined++; // used only in the log() statement below. 731 } 732 733 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 734 735 mProtectedNetworks = new ArrayList<Integer>(); 736 int[] protectedNetworks = context.getResources().getIntArray( 737 com.android.internal.R.array.config_protectedNetworks); 738 for (int p : protectedNetworks) { 739 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 740 mProtectedNetworks.add(p); 741 } else { 742 if (DBG) loge("Ignoring protectedNetwork " + p); 743 } 744 } 745 746 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 747 && SystemProperties.get("ro.build.type").equals("eng"); 748 749 mTethering = new Tethering(mContext, mNetd, statsService, mHandler.getLooper()); 750 751 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 752 753 //set up the listener for user state for creating user VPNs 754 IntentFilter intentFilter = new IntentFilter(); 755 intentFilter.addAction(Intent.ACTION_USER_STARTING); 756 intentFilter.addAction(Intent.ACTION_USER_STOPPING); 757 intentFilter.addAction(Intent.ACTION_USER_ADDED); 758 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 759 mContext.registerReceiverAsUser( 760 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 761 762 try { 763 mNetd.registerObserver(mTethering); 764 mNetd.registerObserver(mDataActivityObserver); 765 } catch (RemoteException e) { 766 loge("Error registering observer :" + e); 767 } 768 769 if (DBG) { 770 mInetLog = new ArrayList(); 771 } 772 773 mSettingsObserver = new SettingsObserver(mContext, mHandler); 774 registerSettingsCallbacks(); 775 776 mDataConnectionStats = new DataConnectionStats(mContext); 777 mDataConnectionStats.startMonitoring(); 778 779 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 780 781 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 782 783 mKeepaliveTracker = new KeepaliveTracker(mHandler); 784 } 785 786 private NetworkRequest createInternetRequestForTransport(int transportType) { 787 NetworkCapabilities netCap = new NetworkCapabilities(); 788 netCap.addCapability(NET_CAPABILITY_INTERNET); 789 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 790 if (transportType > -1) { 791 netCap.addTransportType(transportType); 792 } 793 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 794 } 795 796 private void handleMobileDataAlwaysOn() { 797 final boolean enable = (Settings.Global.getInt( 798 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 799 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 800 if (enable == isEnabled) { 801 return; // Nothing to do. 802 } 803 804 if (enable) { 805 handleRegisterNetworkRequest(new NetworkRequestInfo( 806 null, mDefaultMobileDataRequest, new Binder(), NetworkRequestInfo.REQUEST)); 807 } else { 808 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 809 } 810 } 811 812 private void registerSettingsCallbacks() { 813 // Watch for global HTTP proxy changes. 814 mSettingsObserver.observe( 815 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 816 EVENT_APPLY_GLOBAL_HTTP_PROXY); 817 818 // Watch for whether or not to keep mobile data always on. 819 mSettingsObserver.observe( 820 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 821 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 822 } 823 824 private synchronized int nextNetworkRequestId() { 825 return mNextNetworkRequestId++; 826 } 827 828 @VisibleForTesting 829 protected int reserveNetId() { 830 synchronized (mNetworkForNetId) { 831 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 832 int netId = mNextNetId; 833 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 834 // Make sure NetID unused. http://b/16815182 835 if (!mNetIdInUse.get(netId)) { 836 mNetIdInUse.put(netId, true); 837 return netId; 838 } 839 } 840 } 841 throw new IllegalStateException("No free netIds"); 842 } 843 844 private NetworkState getFilteredNetworkState(int networkType, int uid) { 845 NetworkInfo info = null; 846 LinkProperties lp = null; 847 NetworkCapabilities nc = null; 848 Network network = null; 849 String subscriberId = null; 850 851 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 852 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 853 if (nai != null) { 854 synchronized (nai) { 855 info = new NetworkInfo(nai.networkInfo); 856 lp = new LinkProperties(nai.linkProperties); 857 nc = new NetworkCapabilities(nai.networkCapabilities); 858 // Network objects are outwardly immutable so there is no point to duplicating. 859 // Duplicating also precludes sharing socket factories and connection pools. 860 network = nai.network; 861 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 862 } 863 info.setType(networkType); 864 } else { 865 info = new NetworkInfo(networkType, 0, getNetworkTypeName(networkType), ""); 866 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 867 info.setIsAvailable(true); 868 lp = new LinkProperties(); 869 nc = new NetworkCapabilities(); 870 network = null; 871 } 872 info = getFilteredNetworkInfo(info, lp, uid); 873 } 874 875 return new NetworkState(info, lp, nc, network, subscriberId, null); 876 } 877 878 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 879 if (network == null) { 880 return null; 881 } 882 synchronized (mNetworkForNetId) { 883 return mNetworkForNetId.get(network.netId); 884 } 885 }; 886 887 private Network[] getVpnUnderlyingNetworks(int uid) { 888 if (!mLockdownEnabled) { 889 int user = UserHandle.getUserId(uid); 890 synchronized (mVpns) { 891 Vpn vpn = mVpns.get(user); 892 if (vpn != null && vpn.appliesToUid(uid)) { 893 return vpn.getUnderlyingNetworks(); 894 } 895 } 896 } 897 return null; 898 } 899 900 private NetworkState getUnfilteredActiveNetworkState(int uid) { 901 NetworkInfo info = null; 902 LinkProperties lp = null; 903 NetworkCapabilities nc = null; 904 Network network = null; 905 String subscriberId = null; 906 907 NetworkAgentInfo nai = getDefaultNetwork(); 908 909 final Network[] networks = getVpnUnderlyingNetworks(uid); 910 if (networks != null) { 911 // getUnderlyingNetworks() returns: 912 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 913 // empty array => the VPN explicitly said "no default network". 914 // non-empty array => the VPN specified one or more default networks; we use the 915 // first one. 916 if (networks.length > 0) { 917 nai = getNetworkAgentInfoForNetwork(networks[0]); 918 } else { 919 nai = null; 920 } 921 } 922 923 if (nai != null) { 924 synchronized (nai) { 925 info = new NetworkInfo(nai.networkInfo); 926 lp = new LinkProperties(nai.linkProperties); 927 nc = new NetworkCapabilities(nai.networkCapabilities); 928 // Network objects are outwardly immutable so there is no point to duplicating. 929 // Duplicating also precludes sharing socket factories and connection pools. 930 network = nai.network; 931 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 932 } 933 } 934 935 return new NetworkState(info, lp, nc, network, subscriberId, null); 936 } 937 938 /** 939 * Check if UID should be blocked from using the network with the given LinkProperties. 940 */ 941 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 942 final boolean networkCostly; 943 final int uidRules; 944 945 final String iface = (lp == null ? "" : lp.getInterfaceName()); 946 synchronized (mRulesLock) { 947 networkCostly = mMeteredIfaces.contains(iface); 948 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 949 } 950 951 if ((uidRules & RULE_REJECT_ALL) != 0 952 || (networkCostly && (uidRules & RULE_REJECT_METERED) != 0)) { 953 return true; 954 } 955 956 // no restrictive rules; network is visible 957 return false; 958 } 959 960 /** 961 * Return a filtered {@link NetworkInfo}, potentially marked 962 * {@link DetailedState#BLOCKED} based on 963 * {@link #isNetworkWithLinkPropertiesBlocked}. 964 */ 965 private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, LinkProperties lp, int uid) { 966 if (info != null && isNetworkWithLinkPropertiesBlocked(lp, uid)) { 967 // network is blocked; clone and override state 968 info = new NetworkInfo(info); 969 info.setDetailedState(DetailedState.BLOCKED, null, null); 970 if (VDBG) { 971 log("returning Blocked NetworkInfo for ifname=" + 972 lp.getInterfaceName() + ", uid=" + uid); 973 } 974 } 975 if (info != null && mLockdownTracker != null) { 976 info = mLockdownTracker.augmentNetworkInfo(info); 977 if (VDBG) log("returning Locked NetworkInfo"); 978 } 979 return info; 980 } 981 982 /** 983 * Return NetworkInfo for the active (i.e., connected) network interface. 984 * It is assumed that at most one network is active at a time. If more 985 * than one is active, it is indeterminate which will be returned. 986 * @return the info for the active network, or {@code null} if none is 987 * active 988 */ 989 @Override 990 public NetworkInfo getActiveNetworkInfo() { 991 enforceAccessPermission(); 992 final int uid = Binder.getCallingUid(); 993 NetworkState state = getUnfilteredActiveNetworkState(uid); 994 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 995 } 996 997 @Override 998 public Network getActiveNetwork() { 999 enforceAccessPermission(); 1000 final int uid = Binder.getCallingUid(); 1001 final int user = UserHandle.getUserId(uid); 1002 int vpnNetId = NETID_UNSET; 1003 synchronized (mVpns) { 1004 final Vpn vpn = mVpns.get(user); 1005 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1006 } 1007 NetworkAgentInfo nai; 1008 if (vpnNetId != NETID_UNSET) { 1009 synchronized (mNetworkForNetId) { 1010 nai = mNetworkForNetId.get(vpnNetId); 1011 } 1012 if (nai != null) return nai.network; 1013 } 1014 nai = getDefaultNetwork(); 1015 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 1016 return nai != null ? nai.network : null; 1017 } 1018 1019 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1020 enforceAccessPermission(); 1021 final int uid = Binder.getCallingUid(); 1022 NetworkState state = getUnfilteredActiveNetworkState(uid); 1023 return state.networkInfo; 1024 } 1025 1026 @Override 1027 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 1028 enforceConnectivityInternalPermission(); 1029 NetworkState state = getUnfilteredActiveNetworkState(uid); 1030 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1031 } 1032 1033 @Override 1034 public NetworkInfo getNetworkInfo(int networkType) { 1035 enforceAccessPermission(); 1036 final int uid = Binder.getCallingUid(); 1037 if (getVpnUnderlyingNetworks(uid) != null) { 1038 // A VPN is active, so we may need to return one of its underlying networks. This 1039 // information is not available in LegacyTypeTracker, so we have to get it from 1040 // getUnfilteredActiveNetworkState. 1041 NetworkState state = getUnfilteredActiveNetworkState(uid); 1042 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1043 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1044 } 1045 } 1046 NetworkState state = getFilteredNetworkState(networkType, uid); 1047 return state.networkInfo; 1048 } 1049 1050 @Override 1051 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1052 enforceAccessPermission(); 1053 final int uid = Binder.getCallingUid(); 1054 NetworkInfo info = null; 1055 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1056 if (nai != null) { 1057 synchronized (nai) { 1058 info = new NetworkInfo(nai.networkInfo); 1059 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1060 } 1061 } 1062 return info; 1063 } 1064 1065 @Override 1066 public NetworkInfo[] getAllNetworkInfo() { 1067 enforceAccessPermission(); 1068 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1069 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1070 networkType++) { 1071 NetworkInfo info = getNetworkInfo(networkType); 1072 if (info != null) { 1073 result.add(info); 1074 } 1075 } 1076 return result.toArray(new NetworkInfo[result.size()]); 1077 } 1078 1079 @Override 1080 public Network getNetworkForType(int networkType) { 1081 enforceAccessPermission(); 1082 final int uid = Binder.getCallingUid(); 1083 NetworkState state = getFilteredNetworkState(networkType, uid); 1084 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1085 return state.network; 1086 } 1087 return null; 1088 } 1089 1090 @Override 1091 public Network[] getAllNetworks() { 1092 enforceAccessPermission(); 1093 synchronized (mNetworkForNetId) { 1094 final Network[] result = new Network[mNetworkForNetId.size()]; 1095 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1096 result[i] = mNetworkForNetId.valueAt(i).network; 1097 } 1098 return result; 1099 } 1100 } 1101 1102 @Override 1103 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1104 // The basic principle is: if an app's traffic could possibly go over a 1105 // network, without the app doing anything multinetwork-specific, 1106 // (hence, by "default"), then include that network's capabilities in 1107 // the array. 1108 // 1109 // In the normal case, app traffic only goes over the system's default 1110 // network connection, so that's the only network returned. 1111 // 1112 // With a VPN in force, some app traffic may go into the VPN, and thus 1113 // over whatever underlying networks the VPN specifies, while other app 1114 // traffic may go over the system default network (e.g.: a split-tunnel 1115 // VPN, or an app disallowed by the VPN), so the set of networks 1116 // returned includes the VPN's underlying networks and the system 1117 // default. 1118 enforceAccessPermission(); 1119 1120 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1121 1122 NetworkAgentInfo nai = getDefaultNetwork(); 1123 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1124 if (nc != null) { 1125 result.put(nai.network, nc); 1126 } 1127 1128 if (!mLockdownEnabled) { 1129 synchronized (mVpns) { 1130 Vpn vpn = mVpns.get(userId); 1131 if (vpn != null) { 1132 Network[] networks = vpn.getUnderlyingNetworks(); 1133 if (networks != null) { 1134 for (Network network : networks) { 1135 nai = getNetworkAgentInfoForNetwork(network); 1136 nc = getNetworkCapabilitiesInternal(nai); 1137 if (nc != null) { 1138 result.put(network, nc); 1139 } 1140 } 1141 } 1142 } 1143 } 1144 } 1145 1146 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1147 out = result.values().toArray(out); 1148 return out; 1149 } 1150 1151 @Override 1152 public boolean isNetworkSupported(int networkType) { 1153 enforceAccessPermission(); 1154 return mLegacyTypeTracker.isTypeSupported(networkType); 1155 } 1156 1157 /** 1158 * Return LinkProperties for the active (i.e., connected) default 1159 * network interface. It is assumed that at most one default network 1160 * is active at a time. If more than one is active, it is indeterminate 1161 * which will be returned. 1162 * @return the ip properties for the active network, or {@code null} if 1163 * none is active 1164 */ 1165 @Override 1166 public LinkProperties getActiveLinkProperties() { 1167 enforceAccessPermission(); 1168 final int uid = Binder.getCallingUid(); 1169 NetworkState state = getUnfilteredActiveNetworkState(uid); 1170 return state.linkProperties; 1171 } 1172 1173 @Override 1174 public LinkProperties getLinkPropertiesForType(int networkType) { 1175 enforceAccessPermission(); 1176 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1177 if (nai != null) { 1178 synchronized (nai) { 1179 return new LinkProperties(nai.linkProperties); 1180 } 1181 } 1182 return null; 1183 } 1184 1185 // TODO - this should be ALL networks 1186 @Override 1187 public LinkProperties getLinkProperties(Network network) { 1188 enforceAccessPermission(); 1189 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1190 if (nai != null) { 1191 synchronized (nai) { 1192 return new LinkProperties(nai.linkProperties); 1193 } 1194 } 1195 return null; 1196 } 1197 1198 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1199 if (nai != null) { 1200 synchronized (nai) { 1201 if (nai.networkCapabilities != null) { 1202 return new NetworkCapabilities(nai.networkCapabilities); 1203 } 1204 } 1205 } 1206 return null; 1207 } 1208 1209 @Override 1210 public NetworkCapabilities getNetworkCapabilities(Network network) { 1211 enforceAccessPermission(); 1212 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1213 } 1214 1215 @Override 1216 public NetworkState[] getAllNetworkState() { 1217 // Require internal since we're handing out IMSI details 1218 enforceConnectivityInternalPermission(); 1219 1220 final ArrayList<NetworkState> result = Lists.newArrayList(); 1221 for (Network network : getAllNetworks()) { 1222 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1223 if (nai != null) { 1224 synchronized (nai) { 1225 final String subscriberId = (nai.networkMisc != null) 1226 ? nai.networkMisc.subscriberId : null; 1227 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1228 nai.networkCapabilities, network, subscriberId, null)); 1229 } 1230 } 1231 } 1232 return result.toArray(new NetworkState[result.size()]); 1233 } 1234 1235 @Override 1236 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1237 enforceAccessPermission(); 1238 final int uid = Binder.getCallingUid(); 1239 final long token = Binder.clearCallingIdentity(); 1240 try { 1241 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1242 if (state.networkInfo != null) { 1243 try { 1244 return mPolicyManager.getNetworkQuotaInfo(state); 1245 } catch (RemoteException e) { 1246 } 1247 } 1248 return null; 1249 } finally { 1250 Binder.restoreCallingIdentity(token); 1251 } 1252 } 1253 1254 @Override 1255 public boolean isActiveNetworkMetered() { 1256 enforceAccessPermission(); 1257 final int uid = Binder.getCallingUid(); 1258 final long token = Binder.clearCallingIdentity(); 1259 try { 1260 return isActiveNetworkMeteredUnchecked(uid); 1261 } finally { 1262 Binder.restoreCallingIdentity(token); 1263 } 1264 } 1265 1266 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1267 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1268 if (state.networkInfo != null) { 1269 try { 1270 return mPolicyManager.isNetworkMetered(state); 1271 } catch (RemoteException e) { 1272 } 1273 } 1274 return false; 1275 } 1276 1277 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1278 @Override 1279 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1280 int deviceType = Integer.parseInt(label); 1281 sendDataActivityBroadcast(deviceType, active, tsNanos); 1282 } 1283 }; 1284 1285 /** 1286 * Ensure that a network route exists to deliver traffic to the specified 1287 * host via the specified network interface. 1288 * @param networkType the type of the network over which traffic to the 1289 * specified host is to be routed 1290 * @param hostAddress the IP address of the host to which the route is 1291 * desired 1292 * @return {@code true} on success, {@code false} on failure 1293 */ 1294 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1295 enforceChangePermission(); 1296 if (mProtectedNetworks.contains(networkType)) { 1297 enforceConnectivityInternalPermission(); 1298 } 1299 1300 InetAddress addr; 1301 try { 1302 addr = InetAddress.getByAddress(hostAddress); 1303 } catch (UnknownHostException e) { 1304 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1305 return false; 1306 } 1307 1308 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1309 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1310 return false; 1311 } 1312 1313 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1314 if (nai == null) { 1315 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1316 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1317 } else { 1318 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1319 } 1320 return false; 1321 } 1322 1323 DetailedState netState; 1324 synchronized (nai) { 1325 netState = nai.networkInfo.getDetailedState(); 1326 } 1327 1328 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1329 if (VDBG) { 1330 log("requestRouteToHostAddress on down network " 1331 + "(" + networkType + ") - dropped" 1332 + " netState=" + netState); 1333 } 1334 return false; 1335 } 1336 1337 final int uid = Binder.getCallingUid(); 1338 final long token = Binder.clearCallingIdentity(); 1339 try { 1340 LinkProperties lp; 1341 int netId; 1342 synchronized (nai) { 1343 lp = nai.linkProperties; 1344 netId = nai.network.netId; 1345 } 1346 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1347 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1348 return ok; 1349 } finally { 1350 Binder.restoreCallingIdentity(token); 1351 } 1352 } 1353 1354 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1355 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1356 if (bestRoute == null) { 1357 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1358 } else { 1359 String iface = bestRoute.getInterface(); 1360 if (bestRoute.getGateway().equals(addr)) { 1361 // if there is no better route, add the implied hostroute for our gateway 1362 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1363 } else { 1364 // if we will connect to this through another route, add a direct route 1365 // to it's gateway 1366 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1367 } 1368 } 1369 if (DBG) log("Adding legacy route " + bestRoute + 1370 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1371 try { 1372 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1373 } catch (Exception e) { 1374 // never crash - catch them all 1375 if (DBG) loge("Exception trying to add a route: " + e); 1376 return false; 1377 } 1378 return true; 1379 } 1380 1381 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1382 @Override 1383 public void onUidRulesChanged(int uid, int uidRules) { 1384 // caller is NPMS, since we only register with them 1385 if (LOGD_RULES) { 1386 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1387 } 1388 1389 synchronized (mRulesLock) { 1390 // skip update when we've already applied rules 1391 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1392 if (oldRules == uidRules) return; 1393 1394 mUidRules.put(uid, uidRules); 1395 } 1396 1397 // TODO: notify UID when it has requested targeted updates 1398 } 1399 1400 @Override 1401 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1402 // caller is NPMS, since we only register with them 1403 if (LOGD_RULES) { 1404 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1405 } 1406 1407 synchronized (mRulesLock) { 1408 mMeteredIfaces.clear(); 1409 for (String iface : meteredIfaces) { 1410 mMeteredIfaces.add(iface); 1411 } 1412 } 1413 } 1414 1415 @Override 1416 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1417 // caller is NPMS, since we only register with them 1418 if (LOGD_RULES) { 1419 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1420 } 1421 } 1422 }; 1423 1424 /** 1425 * Require that the caller is either in the same user or has appropriate permission to interact 1426 * across users. 1427 * 1428 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1429 */ 1430 private void enforceCrossUserPermission(int userId) { 1431 if (userId == UserHandle.getCallingUserId()) { 1432 // Not a cross-user call. 1433 return; 1434 } 1435 mContext.enforceCallingOrSelfPermission( 1436 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1437 "ConnectivityService"); 1438 } 1439 1440 private void enforceInternetPermission() { 1441 mContext.enforceCallingOrSelfPermission( 1442 android.Manifest.permission.INTERNET, 1443 "ConnectivityService"); 1444 } 1445 1446 private void enforceAccessPermission() { 1447 mContext.enforceCallingOrSelfPermission( 1448 android.Manifest.permission.ACCESS_NETWORK_STATE, 1449 "ConnectivityService"); 1450 } 1451 1452 private void enforceChangePermission() { 1453 int uid = Binder.getCallingUid(); 1454 Settings.checkAndNoteChangeNetworkStateOperation(mContext, uid, Settings 1455 .getPackageNameForUid(mContext, uid), true); 1456 1457 } 1458 1459 private void enforceTetherAccessPermission() { 1460 mContext.enforceCallingOrSelfPermission( 1461 android.Manifest.permission.ACCESS_NETWORK_STATE, 1462 "ConnectivityService"); 1463 } 1464 1465 private void enforceConnectivityInternalPermission() { 1466 mContext.enforceCallingOrSelfPermission( 1467 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1468 "ConnectivityService"); 1469 } 1470 1471 private void enforceKeepalivePermission() { 1472 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1473 } 1474 1475 public void sendConnectedBroadcast(NetworkInfo info) { 1476 enforceConnectivityInternalPermission(); 1477 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1478 } 1479 1480 private void sendInetConditionBroadcast(NetworkInfo info) { 1481 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1482 } 1483 1484 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1485 if (mLockdownTracker != null) { 1486 info = mLockdownTracker.augmentNetworkInfo(info); 1487 } 1488 1489 Intent intent = new Intent(bcastType); 1490 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1491 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1492 if (info.isFailover()) { 1493 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1494 info.setFailover(false); 1495 } 1496 if (info.getReason() != null) { 1497 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1498 } 1499 if (info.getExtraInfo() != null) { 1500 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1501 info.getExtraInfo()); 1502 } 1503 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1504 return intent; 1505 } 1506 1507 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1508 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1509 } 1510 1511 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1512 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1513 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1514 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1515 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1516 final long ident = Binder.clearCallingIdentity(); 1517 try { 1518 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1519 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1520 } finally { 1521 Binder.restoreCallingIdentity(ident); 1522 } 1523 } 1524 1525 private void sendStickyBroadcast(Intent intent) { 1526 synchronized(this) { 1527 if (!mSystemReady) { 1528 mInitialBroadcast = new Intent(intent); 1529 } 1530 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1531 if (DBG) { 1532 log("sendStickyBroadcast: action=" + intent.getAction()); 1533 } 1534 1535 final long ident = Binder.clearCallingIdentity(); 1536 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1537 final NetworkInfo ni = intent.getParcelableExtra( 1538 ConnectivityManager.EXTRA_NETWORK_INFO); 1539 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1540 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1541 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1542 } 1543 final IBatteryStats bs = BatteryStatsService.getService(); 1544 try { 1545 bs.noteConnectivityChanged(intent.getIntExtra( 1546 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1547 ni != null ? ni.getState().toString() : "?"); 1548 } catch (RemoteException e) { 1549 } 1550 } 1551 try { 1552 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 1553 } finally { 1554 Binder.restoreCallingIdentity(ident); 1555 } 1556 } 1557 } 1558 1559 void systemReady() { 1560 loadGlobalProxy(); 1561 1562 synchronized(this) { 1563 mSystemReady = true; 1564 if (mInitialBroadcast != null) { 1565 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1566 mInitialBroadcast = null; 1567 } 1568 } 1569 // load the global proxy at startup 1570 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1571 1572 // Try bringing up tracker, but if KeyStore isn't ready yet, wait 1573 // for user to unlock device. 1574 if (!updateLockdownVpn()) { 1575 final IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT); 1576 mContext.registerReceiver(mUserPresentReceiver, filter); 1577 } 1578 1579 // Configure whether mobile data is always on. 1580 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1581 1582 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1583 1584 mPermissionMonitor.startMonitoring(); 1585 } 1586 1587 private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() { 1588 @Override 1589 public void onReceive(Context context, Intent intent) { 1590 // Try creating lockdown tracker, since user present usually means 1591 // unlocked keystore. 1592 if (updateLockdownVpn()) { 1593 mContext.unregisterReceiver(this); 1594 } 1595 } 1596 }; 1597 1598 /** 1599 * Setup data activity tracking for the given network. 1600 * 1601 * Every {@code setupDataActivityTracking} should be paired with a 1602 * {@link #removeDataActivityTracking} for cleanup. 1603 */ 1604 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1605 final String iface = networkAgent.linkProperties.getInterfaceName(); 1606 1607 final int timeout; 1608 int type = ConnectivityManager.TYPE_NONE; 1609 1610 if (networkAgent.networkCapabilities.hasTransport( 1611 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1612 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1613 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1614 10); 1615 type = ConnectivityManager.TYPE_MOBILE; 1616 } else if (networkAgent.networkCapabilities.hasTransport( 1617 NetworkCapabilities.TRANSPORT_WIFI)) { 1618 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1619 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1620 15); 1621 type = ConnectivityManager.TYPE_WIFI; 1622 } else { 1623 // do not track any other networks 1624 timeout = 0; 1625 } 1626 1627 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1628 try { 1629 mNetd.addIdleTimer(iface, timeout, type); 1630 } catch (Exception e) { 1631 // You shall not crash! 1632 loge("Exception in setupDataActivityTracking " + e); 1633 } 1634 } 1635 } 1636 1637 /** 1638 * Remove data activity tracking when network disconnects. 1639 */ 1640 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1641 final String iface = networkAgent.linkProperties.getInterfaceName(); 1642 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1643 1644 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1645 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1646 try { 1647 // the call fails silently if no idletimer setup for this interface 1648 mNetd.removeIdleTimer(iface); 1649 } catch (Exception e) { 1650 loge("Exception in removeDataActivityTracking " + e); 1651 } 1652 } 1653 } 1654 1655 /** 1656 * Reads the network specific MTU size from reources. 1657 * and set it on it's iface. 1658 */ 1659 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1660 final String iface = newLp.getInterfaceName(); 1661 final int mtu = newLp.getMtu(); 1662 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1663 if (VDBG) log("identical MTU - not setting"); 1664 return; 1665 } 1666 1667 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1668 loge("Unexpected mtu value: " + mtu + ", " + iface); 1669 return; 1670 } 1671 1672 // Cannot set MTU without interface name 1673 if (TextUtils.isEmpty(iface)) { 1674 loge("Setting MTU size with null iface."); 1675 return; 1676 } 1677 1678 try { 1679 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1680 mNetd.setMtu(iface, mtu); 1681 } catch (Exception e) { 1682 Slog.e(TAG, "exception in setMtu()" + e); 1683 } 1684 } 1685 1686 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1687 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1688 1689 // Overridden for testing purposes to avoid writing to SystemProperties. 1690 @VisibleForTesting 1691 protected int getDefaultTcpRwnd() { 1692 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1693 } 1694 1695 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1696 if (isDefaultNetwork(nai) == false) { 1697 return; 1698 } 1699 1700 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1701 String[] values = null; 1702 if (tcpBufferSizes != null) { 1703 values = tcpBufferSizes.split(","); 1704 } 1705 1706 if (values == null || values.length != 6) { 1707 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1708 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1709 values = tcpBufferSizes.split(","); 1710 } 1711 1712 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1713 1714 try { 1715 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1716 1717 final String prefix = "/sys/kernel/ipv4/tcp_"; 1718 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1719 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1720 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1721 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1722 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1723 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1724 mCurrentTcpBufferSizes = tcpBufferSizes; 1725 } catch (IOException e) { 1726 loge("Can't set TCP buffer sizes:" + e); 1727 } 1728 1729 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1730 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1731 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1732 if (rwndValue != 0) { 1733 SystemProperties.set(sysctlKey, rwndValue.toString()); 1734 } 1735 } 1736 1737 private void flushVmDnsCache() { 1738 /* 1739 * Tell the VMs to toss their DNS caches 1740 */ 1741 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1742 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1743 /* 1744 * Connectivity events can happen before boot has completed ... 1745 */ 1746 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1747 final long ident = Binder.clearCallingIdentity(); 1748 try { 1749 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1750 } finally { 1751 Binder.restoreCallingIdentity(ident); 1752 } 1753 } 1754 1755 @Override 1756 public int getRestoreDefaultNetworkDelay(int networkType) { 1757 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1758 NETWORK_RESTORE_DELAY_PROP_NAME); 1759 if(restoreDefaultNetworkDelayStr != null && 1760 restoreDefaultNetworkDelayStr.length() != 0) { 1761 try { 1762 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1763 } catch (NumberFormatException e) { 1764 } 1765 } 1766 // if the system property isn't set, use the value for the apn type 1767 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1768 1769 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1770 (mNetConfigs[networkType] != null)) { 1771 ret = mNetConfigs[networkType].restoreTime; 1772 } 1773 return ret; 1774 } 1775 1776 private boolean argsContain(String[] args, String target) { 1777 for (String arg : args) { 1778 if (arg.equals(target)) return true; 1779 } 1780 return false; 1781 } 1782 1783 @Override 1784 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1785 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1786 if (mContext.checkCallingOrSelfPermission( 1787 android.Manifest.permission.DUMP) 1788 != PackageManager.PERMISSION_GRANTED) { 1789 pw.println("Permission Denial: can't dump ConnectivityService " + 1790 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1791 Binder.getCallingUid()); 1792 return; 1793 } 1794 1795 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1796 if (argsContain(args, "--diag")) { 1797 final long DIAG_TIME_MS = 5000; 1798 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1799 // Start gathering diagnostic information. 1800 netDiags.add(new NetworkDiagnostics( 1801 nai.network, 1802 new LinkProperties(nai.linkProperties), // Must be a copy. 1803 DIAG_TIME_MS)); 1804 } 1805 1806 for (NetworkDiagnostics netDiag : netDiags) { 1807 pw.println(); 1808 netDiag.waitForMeasurements(); 1809 netDiag.dump(pw); 1810 } 1811 1812 return; 1813 } 1814 1815 pw.print("NetworkFactories for:"); 1816 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1817 pw.print(" " + nfi.name); 1818 } 1819 pw.println(); 1820 pw.println(); 1821 1822 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1823 pw.print("Active default network: "); 1824 if (defaultNai == null) { 1825 pw.println("none"); 1826 } else { 1827 pw.println(defaultNai.network.netId); 1828 } 1829 pw.println(); 1830 1831 pw.println("Current Networks:"); 1832 pw.increaseIndent(); 1833 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1834 pw.println(nai.toString()); 1835 pw.increaseIndent(); 1836 pw.println("Requests:"); 1837 pw.increaseIndent(); 1838 for (int i = 0; i < nai.networkRequests.size(); i++) { 1839 pw.println(nai.networkRequests.valueAt(i).toString()); 1840 } 1841 pw.decreaseIndent(); 1842 pw.println("Lingered:"); 1843 pw.increaseIndent(); 1844 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1845 pw.decreaseIndent(); 1846 pw.decreaseIndent(); 1847 } 1848 pw.decreaseIndent(); 1849 pw.println(); 1850 1851 pw.println("Network Requests:"); 1852 pw.increaseIndent(); 1853 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1854 pw.println(nri.toString()); 1855 } 1856 pw.println(); 1857 pw.decreaseIndent(); 1858 1859 mLegacyTypeTracker.dump(pw); 1860 1861 synchronized (this) { 1862 pw.print("mNetTransitionWakeLock: currently " + 1863 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1864 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1865 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1866 } else { 1867 pw.println(", last requested never"); 1868 } 1869 } 1870 1871 pw.println(); 1872 mTethering.dump(fd, pw, args); 1873 1874 pw.println(); 1875 mKeepaliveTracker.dump(pw); 1876 1877 if (mInetLog != null && mInetLog.size() > 0) { 1878 pw.println(); 1879 pw.println("Inet condition reports:"); 1880 pw.increaseIndent(); 1881 for(int i = 0; i < mInetLog.size(); i++) { 1882 pw.println(mInetLog.get(i)); 1883 } 1884 pw.decreaseIndent(); 1885 } 1886 1887 if (argsContain(args, "--short") == false) { 1888 pw.println(); 1889 synchronized (mValidationLogs) { 1890 pw.println("mValidationLogs (most recent first):"); 1891 for (Pair<Network,ReadOnlyLocalLog> p : mValidationLogs) { 1892 pw.println(p.first); 1893 pw.increaseIndent(); 1894 p.second.dump(fd, pw, args); 1895 pw.decreaseIndent(); 1896 } 1897 } 1898 1899 pw.println(); 1900 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1901 pw.increaseIndent(); 1902 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1903 pw.decreaseIndent(); 1904 } 1905 } 1906 1907 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, String msg) { 1908 if (nai.network == null) return false; 1909 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1910 if (officialNai != null && officialNai.equals(nai)) return true; 1911 if (officialNai != null || VDBG) { 1912 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1913 " - " + nai); 1914 } 1915 return false; 1916 } 1917 1918 private boolean isRequest(NetworkRequest request) { 1919 return mNetworkRequests.get(request).isRequest; 1920 } 1921 1922 // must be stateless - things change under us. 1923 private class NetworkStateTrackerHandler extends Handler { 1924 public NetworkStateTrackerHandler(Looper looper) { 1925 super(looper); 1926 } 1927 1928 @Override 1929 public void handleMessage(Message msg) { 1930 NetworkInfo info; 1931 switch (msg.what) { 1932 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1933 handleAsyncChannelHalfConnect(msg); 1934 break; 1935 } 1936 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1937 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1938 if (nai != null) nai.asyncChannel.disconnect(); 1939 break; 1940 } 1941 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1942 handleAsyncChannelDisconnected(msg); 1943 break; 1944 } 1945 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1946 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1947 if (nai == null) { 1948 loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent"); 1949 } else { 1950 final NetworkCapabilities networkCapabilities = 1951 (NetworkCapabilities)msg.obj; 1952 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 1953 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 1954 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 1955 } 1956 if (nai.created && !nai.networkCapabilities.equalImmutableCapabilities( 1957 networkCapabilities)) { 1958 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 1959 + nai.networkCapabilities + " -> " + networkCapabilities); 1960 } 1961 updateCapabilities(nai, networkCapabilities); 1962 } 1963 break; 1964 } 1965 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1966 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1967 if (nai == null) { 1968 loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED"); 1969 } else { 1970 if (VDBG) { 1971 log("Update of LinkProperties for " + nai.name() + 1972 "; created=" + nai.created); 1973 } 1974 LinkProperties oldLp = nai.linkProperties; 1975 synchronized (nai) { 1976 nai.linkProperties = (LinkProperties)msg.obj; 1977 } 1978 if (nai.created) updateLinkProperties(nai, oldLp); 1979 } 1980 break; 1981 } 1982 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1983 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1984 if (nai == null) { 1985 loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent"); 1986 break; 1987 } 1988 info = (NetworkInfo) msg.obj; 1989 updateNetworkInfo(nai, info); 1990 break; 1991 } 1992 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1993 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1994 if (nai == null) { 1995 loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent"); 1996 break; 1997 } 1998 Integer score = (Integer) msg.obj; 1999 if (score != null) updateNetworkScore(nai, score.intValue()); 2000 break; 2001 } 2002 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2003 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2004 if (nai == null) { 2005 loge("EVENT_UID_RANGES_ADDED from unknown NetworkAgent"); 2006 break; 2007 } 2008 try { 2009 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2010 } catch (Exception e) { 2011 // Never crash! 2012 loge("Exception in addVpnUidRanges: " + e); 2013 } 2014 break; 2015 } 2016 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2017 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2018 if (nai == null) { 2019 loge("EVENT_UID_RANGES_REMOVED from unknown NetworkAgent"); 2020 break; 2021 } 2022 try { 2023 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2024 } catch (Exception e) { 2025 // Never crash! 2026 loge("Exception in removeVpnUidRanges: " + e); 2027 } 2028 break; 2029 } 2030 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2031 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2032 if (nai == null) { 2033 loge("EVENT_SET_EXPLICITLY_SELECTED from unknown NetworkAgent"); 2034 break; 2035 } 2036 if (nai.created && !nai.networkMisc.explicitlySelected) { 2037 loge("ERROR: created network explicitly selected."); 2038 } 2039 nai.networkMisc.explicitlySelected = true; 2040 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2041 break; 2042 } 2043 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2044 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2045 if (nai == null) { 2046 loge("EVENT_PACKET_KEEPALIVE from unknown NetworkAgent"); 2047 break; 2048 } 2049 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2050 break; 2051 } 2052 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2053 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2054 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_TESTED")) { 2055 final boolean valid = 2056 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2057 if (DBG) log(nai.name() + " validation " + (valid ? " passed" : "failed")); 2058 if (valid != nai.lastValidated) { 2059 final int oldScore = nai.getCurrentScore(); 2060 nai.lastValidated = valid; 2061 nai.everValidated |= valid; 2062 updateCapabilities(nai, nai.networkCapabilities); 2063 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2064 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2065 } 2066 updateInetCondition(nai); 2067 // Let the NetworkAgent know the state of its network 2068 nai.asyncChannel.sendMessage( 2069 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2070 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2071 0, null); 2072 } 2073 break; 2074 } 2075 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 2076 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2077 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_LINGER_COMPLETE")) { 2078 handleLingerComplete(nai); 2079 } 2080 break; 2081 } 2082 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2083 final int netId = msg.arg2; 2084 final boolean visible = (msg.arg1 != 0); 2085 final NetworkAgentInfo nai; 2086 synchronized (mNetworkForNetId) { 2087 nai = mNetworkForNetId.get(netId); 2088 } 2089 // If captive portal status has changed, update capabilities. 2090 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2091 nai.lastCaptivePortalDetected = visible; 2092 nai.everCaptivePortalDetected |= visible; 2093 updateCapabilities(nai, nai.networkCapabilities); 2094 } 2095 if (!visible) { 2096 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2097 } else { 2098 if (nai == null) { 2099 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2100 break; 2101 } 2102 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2103 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2104 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2105 } 2106 break; 2107 } 2108 } 2109 } 2110 } 2111 2112 private void linger(NetworkAgentInfo nai) { 2113 nai.lingering = true; 2114 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 2115 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 2116 } 2117 2118 // Cancel any lingering so the linger timeout doesn't teardown a network. 2119 // This should be called when a network begins satisfying a NetworkRequest. 2120 // Note: depending on what state the NetworkMonitor is in (e.g., 2121 // if it's awaiting captive portal login, or if validation failed), this 2122 // may trigger a re-evaluation of the network. 2123 private void unlinger(NetworkAgentInfo nai) { 2124 nai.networkLingered.clear(); 2125 if (!nai.lingering) return; 2126 nai.lingering = false; 2127 if (VDBG) log("Canceling linger of " + nai.name()); 2128 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2129 } 2130 2131 private void handleAsyncChannelHalfConnect(Message msg) { 2132 AsyncChannel ac = (AsyncChannel) msg.obj; 2133 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2134 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2135 if (VDBG) log("NetworkFactory connected"); 2136 // A network factory has connected. Send it all current NetworkRequests. 2137 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2138 if (nri.isRequest == false) continue; 2139 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2140 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2141 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2142 } 2143 } else { 2144 loge("Error connecting NetworkFactory"); 2145 mNetworkFactoryInfos.remove(msg.obj); 2146 } 2147 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2148 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2149 if (VDBG) log("NetworkAgent connected"); 2150 // A network agent has requested a connection. Establish the connection. 2151 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2152 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2153 } else { 2154 loge("Error connecting NetworkAgent"); 2155 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2156 if (nai != null) { 2157 final boolean wasDefault = isDefaultNetwork(nai); 2158 synchronized (mNetworkForNetId) { 2159 mNetworkForNetId.remove(nai.network.netId); 2160 mNetIdInUse.delete(nai.network.netId); 2161 } 2162 // Just in case. 2163 mLegacyTypeTracker.remove(nai, wasDefault); 2164 } 2165 } 2166 } 2167 } 2168 2169 private void handleAsyncChannelDisconnected(Message msg) { 2170 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2171 if (nai != null) { 2172 if (DBG) { 2173 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2174 } 2175 // A network agent has disconnected. 2176 // TODO - if we move the logic to the network agent (have them disconnect 2177 // because they lost all their requests or because their score isn't good) 2178 // then they would disconnect organically, report their new state and then 2179 // disconnect the channel. 2180 if (nai.networkInfo.isConnected()) { 2181 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2182 null, null); 2183 } 2184 final boolean wasDefault = isDefaultNetwork(nai); 2185 if (wasDefault) { 2186 mDefaultInetConditionPublished = 0; 2187 } 2188 notifyIfacesChanged(); 2189 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2190 // by other networks that are already connected. Perhaps that can be done by 2191 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2192 // of rematchAllNetworksAndRequests 2193 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2194 mKeepaliveTracker.handleStopAllKeepalives(nai, 2195 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2196 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2197 mNetworkAgentInfos.remove(msg.replyTo); 2198 updateClat(null, nai.linkProperties, nai); 2199 synchronized (mNetworkForNetId) { 2200 // Remove the NetworkAgent, but don't mark the netId as 2201 // available until we've told netd to delete it below. 2202 mNetworkForNetId.remove(nai.network.netId); 2203 } 2204 // Remove all previously satisfied requests. 2205 for (int i = 0; i < nai.networkRequests.size(); i++) { 2206 NetworkRequest request = nai.networkRequests.valueAt(i); 2207 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2208 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2209 mNetworkForRequestId.remove(request.requestId); 2210 sendUpdatedScoreToFactories(request, 0); 2211 } 2212 } 2213 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2214 removeDataActivityTracking(nai); 2215 notifyLockdownVpn(nai); 2216 requestNetworkTransitionWakelock(nai.name()); 2217 } 2218 mLegacyTypeTracker.remove(nai, wasDefault); 2219 rematchAllNetworksAndRequests(null, 0); 2220 if (nai.created) { 2221 // Tell netd to clean up the configuration for this network 2222 // (routing rules, DNS, etc). 2223 // This may be slow as it requires a lot of netd shelling out to ip and 2224 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2225 // after we've rematched networks with requests which should make a potential 2226 // fallback network the default or requested a new network from the 2227 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2228 // long time. 2229 try { 2230 mNetd.removeNetwork(nai.network.netId); 2231 } catch (Exception e) { 2232 loge("Exception removing network: " + e); 2233 } 2234 } 2235 synchronized (mNetworkForNetId) { 2236 mNetIdInUse.delete(nai.network.netId); 2237 } 2238 } else { 2239 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2240 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2241 } 2242 } 2243 2244 // If this method proves to be too slow then we can maintain a separate 2245 // pendingIntent => NetworkRequestInfo map. 2246 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2247 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2248 Intent intent = pendingIntent.getIntent(); 2249 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2250 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2251 if (existingPendingIntent != null && 2252 existingPendingIntent.getIntent().filterEquals(intent)) { 2253 return entry.getValue(); 2254 } 2255 } 2256 return null; 2257 } 2258 2259 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2260 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2261 2262 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2263 if (existingRequest != null) { // remove the existing request. 2264 if (DBG) log("Replacing " + existingRequest.request + " with " 2265 + nri.request + " because their intents matched."); 2266 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2267 } 2268 handleRegisterNetworkRequest(nri); 2269 } 2270 2271 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2272 mNetworkRequests.put(nri.request, nri); 2273 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2274 if (!nri.isRequest) { 2275 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2276 if (nri.request.networkCapabilities.hasSignalStrength() && 2277 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2278 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2279 } 2280 } 2281 } 2282 rematchAllNetworksAndRequests(null, 0); 2283 if (nri.isRequest && mNetworkForRequestId.get(nri.request.requestId) == null) { 2284 sendUpdatedScoreToFactories(nri.request, 0); 2285 } 2286 } 2287 2288 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2289 int callingUid) { 2290 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2291 if (nri != null) { 2292 handleReleaseNetworkRequest(nri.request, callingUid); 2293 } 2294 } 2295 2296 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2297 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2298 // would it have a chance of satisfying any NetworkRequests. 2299 private boolean unneeded(NetworkAgentInfo nai) { 2300 if (!nai.created || nai.isVPN() || nai.lingering) return false; 2301 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2302 // If this Network is already the highest scoring Network for a request, or if 2303 // there is hope for it to become one if it validated, then it is needed. 2304 if (nri.isRequest && nai.satisfies(nri.request) && 2305 (nai.networkRequests.get(nri.request.requestId) != null || 2306 // Note that this catches two important cases: 2307 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2308 // is currently satisfying the request. This is desirable when 2309 // cellular ends up validating but WiFi does not. 2310 // 2. Unvalidated WiFi will not be reaped when validated cellular 2311 // is currently satisfying the request. This is desirable when 2312 // WiFi ends up validating and out scoring cellular. 2313 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2314 nai.getCurrentScoreAsValidated())) { 2315 return false; 2316 } 2317 } 2318 return true; 2319 } 2320 2321 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2322 NetworkRequestInfo nri = mNetworkRequests.get(request); 2323 if (nri != null) { 2324 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2325 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2326 return; 2327 } 2328 if (DBG) log("releasing NetworkRequest " + request); 2329 nri.unlinkDeathRecipient(); 2330 mNetworkRequests.remove(request); 2331 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2332 if (nri.isRequest) { 2333 // Find all networks that are satisfying this request and remove the request 2334 // from their request lists. 2335 // TODO - it's my understanding that for a request there is only a single 2336 // network satisfying it, so this loop is wasteful 2337 boolean wasKept = false; 2338 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2339 if (nai.networkRequests.get(nri.request.requestId) != null) { 2340 nai.networkRequests.remove(nri.request.requestId); 2341 if (DBG) { 2342 log(" Removing from current network " + nai.name() + 2343 ", leaving " + nai.networkRequests.size() + 2344 " requests."); 2345 } 2346 if (unneeded(nai)) { 2347 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2348 teardownUnneededNetwork(nai); 2349 } else { 2350 // suspect there should only be one pass through here 2351 // but if any were kept do the check below 2352 wasKept |= true; 2353 } 2354 } 2355 } 2356 2357 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2358 if (nai != null) { 2359 mNetworkForRequestId.remove(nri.request.requestId); 2360 } 2361 // Maintain the illusion. When this request arrived, we might have pretended 2362 // that a network connected to serve it, even though the network was already 2363 // connected. Now that this request has gone away, we might have to pretend 2364 // that the network disconnected. LegacyTypeTracker will generate that 2365 // phantom disconnect for this type. 2366 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2367 boolean doRemove = true; 2368 if (wasKept) { 2369 // check if any of the remaining requests for this network are for the 2370 // same legacy type - if so, don't remove the nai 2371 for (int i = 0; i < nai.networkRequests.size(); i++) { 2372 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2373 if (otherRequest.legacyType == nri.request.legacyType && 2374 isRequest(otherRequest)) { 2375 if (DBG) log(" still have other legacy request - leaving"); 2376 doRemove = false; 2377 } 2378 } 2379 } 2380 2381 if (doRemove) { 2382 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2383 } 2384 } 2385 2386 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2387 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2388 nri.request); 2389 } 2390 } else { 2391 // listens don't have a singular affectedNetwork. Check all networks to see 2392 // if this listen request applies and remove it. 2393 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2394 nai.networkRequests.remove(nri.request.requestId); 2395 if (nri.request.networkCapabilities.hasSignalStrength() && 2396 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2397 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2398 } 2399 } 2400 } 2401 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2402 } 2403 } 2404 2405 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2406 enforceConnectivityInternalPermission(); 2407 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2408 accept ? 1 : 0, always ? 1: 0, network)); 2409 } 2410 2411 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2412 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2413 " accept=" + accept + " always=" + always); 2414 2415 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2416 if (nai == null) { 2417 // Nothing to do. 2418 return; 2419 } 2420 2421 if (nai.everValidated) { 2422 // The network validated while the dialog box was up. Take no action. 2423 return; 2424 } 2425 2426 if (!nai.networkMisc.explicitlySelected) { 2427 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2428 } 2429 2430 if (accept != nai.networkMisc.acceptUnvalidated) { 2431 int oldScore = nai.getCurrentScore(); 2432 nai.networkMisc.acceptUnvalidated = accept; 2433 rematchAllNetworksAndRequests(nai, oldScore); 2434 sendUpdatedScoreToFactories(nai); 2435 } 2436 2437 if (always) { 2438 nai.asyncChannel.sendMessage( 2439 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2440 } 2441 2442 if (!accept) { 2443 // Tell the NetworkAgent to not automatically reconnect to the network. 2444 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2445 // Teardown the nework. 2446 teardownUnneededNetwork(nai); 2447 } 2448 2449 } 2450 2451 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2452 if (DBG) log("scheduleUnvalidatedPrompt " + nai.network); 2453 mHandler.sendMessageDelayed( 2454 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2455 PROMPT_UNVALIDATED_DELAY_MS); 2456 } 2457 2458 private void handlePromptUnvalidated(Network network) { 2459 if (DBG) log("handlePromptUnvalidated " + network); 2460 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2461 2462 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2463 // we haven't already been told to switch to it regardless of whether it validated or not. 2464 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2465 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2466 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2467 return; 2468 } 2469 2470 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2471 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2472 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2473 intent.setClassName("com.android.settings", 2474 "com.android.settings.wifi.WifiNoInternetDialog"); 2475 2476 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2477 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2478 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2479 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2480 } 2481 2482 private class InternalHandler extends Handler { 2483 public InternalHandler(Looper looper) { 2484 super(looper); 2485 } 2486 2487 @Override 2488 public void handleMessage(Message msg) { 2489 switch (msg.what) { 2490 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2491 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2492 String causedBy = null; 2493 synchronized (ConnectivityService.this) { 2494 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2495 mNetTransitionWakeLock.isHeld()) { 2496 mNetTransitionWakeLock.release(); 2497 causedBy = mNetTransitionWakeLockCausedBy; 2498 } else { 2499 break; 2500 } 2501 } 2502 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2503 log("Failed to find a new network - expiring NetTransition Wakelock"); 2504 } else { 2505 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2506 " cleared because we found a replacement network"); 2507 } 2508 break; 2509 } 2510 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2511 handleDeprecatedGlobalHttpProxy(); 2512 break; 2513 } 2514 case EVENT_SEND_STICKY_BROADCAST_INTENT: { 2515 Intent intent = (Intent)msg.obj; 2516 sendStickyBroadcast(intent); 2517 break; 2518 } 2519 case EVENT_PROXY_HAS_CHANGED: { 2520 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2521 break; 2522 } 2523 case EVENT_REGISTER_NETWORK_FACTORY: { 2524 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2525 break; 2526 } 2527 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2528 handleUnregisterNetworkFactory((Messenger)msg.obj); 2529 break; 2530 } 2531 case EVENT_REGISTER_NETWORK_AGENT: { 2532 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2533 break; 2534 } 2535 case EVENT_REGISTER_NETWORK_REQUEST: 2536 case EVENT_REGISTER_NETWORK_LISTENER: { 2537 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2538 break; 2539 } 2540 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2541 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2542 handleRegisterNetworkRequestWithIntent(msg); 2543 break; 2544 } 2545 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2546 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2547 break; 2548 } 2549 case EVENT_RELEASE_NETWORK_REQUEST: { 2550 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2551 break; 2552 } 2553 case EVENT_SET_ACCEPT_UNVALIDATED: { 2554 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2555 break; 2556 } 2557 case EVENT_PROMPT_UNVALIDATED: { 2558 handlePromptUnvalidated((Network) msg.obj); 2559 break; 2560 } 2561 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2562 handleMobileDataAlwaysOn(); 2563 break; 2564 } 2565 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2566 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2567 mKeepaliveTracker.handleStartKeepalive(msg); 2568 break; 2569 } 2570 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2571 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2572 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2573 int slot = msg.arg1; 2574 int reason = msg.arg2; 2575 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2576 break; 2577 } 2578 case EVENT_SYSTEM_READY: { 2579 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2580 nai.networkMonitor.systemReady = true; 2581 } 2582 break; 2583 } 2584 } 2585 } 2586 } 2587 2588 // javadoc from interface 2589 public int tether(String iface) { 2590 ConnectivityManager.enforceTetherChangePermission(mContext); 2591 if (isTetheringSupported()) { 2592 return mTethering.tether(iface); 2593 } else { 2594 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2595 } 2596 } 2597 2598 // javadoc from interface 2599 public int untether(String iface) { 2600 ConnectivityManager.enforceTetherChangePermission(mContext); 2601 2602 if (isTetheringSupported()) { 2603 return mTethering.untether(iface); 2604 } else { 2605 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2606 } 2607 } 2608 2609 // javadoc from interface 2610 public int getLastTetherError(String iface) { 2611 enforceTetherAccessPermission(); 2612 2613 if (isTetheringSupported()) { 2614 return mTethering.getLastTetherError(iface); 2615 } else { 2616 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2617 } 2618 } 2619 2620 // TODO - proper iface API for selection by property, inspection, etc 2621 public String[] getTetherableUsbRegexs() { 2622 enforceTetherAccessPermission(); 2623 if (isTetheringSupported()) { 2624 return mTethering.getTetherableUsbRegexs(); 2625 } else { 2626 return new String[0]; 2627 } 2628 } 2629 2630 public String[] getTetherableWifiRegexs() { 2631 enforceTetherAccessPermission(); 2632 if (isTetheringSupported()) { 2633 return mTethering.getTetherableWifiRegexs(); 2634 } else { 2635 return new String[0]; 2636 } 2637 } 2638 2639 public String[] getTetherableBluetoothRegexs() { 2640 enforceTetherAccessPermission(); 2641 if (isTetheringSupported()) { 2642 return mTethering.getTetherableBluetoothRegexs(); 2643 } else { 2644 return new String[0]; 2645 } 2646 } 2647 2648 public int setUsbTethering(boolean enable) { 2649 ConnectivityManager.enforceTetherChangePermission(mContext); 2650 if (isTetheringSupported()) { 2651 return mTethering.setUsbTethering(enable); 2652 } else { 2653 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2654 } 2655 } 2656 2657 // TODO - move iface listing, queries, etc to new module 2658 // javadoc from interface 2659 public String[] getTetherableIfaces() { 2660 enforceTetherAccessPermission(); 2661 return mTethering.getTetherableIfaces(); 2662 } 2663 2664 public String[] getTetheredIfaces() { 2665 enforceTetherAccessPermission(); 2666 return mTethering.getTetheredIfaces(); 2667 } 2668 2669 public String[] getTetheringErroredIfaces() { 2670 enforceTetherAccessPermission(); 2671 return mTethering.getErroredIfaces(); 2672 } 2673 2674 public String[] getTetheredDhcpRanges() { 2675 enforceConnectivityInternalPermission(); 2676 return mTethering.getTetheredDhcpRanges(); 2677 } 2678 2679 // if ro.tether.denied = true we default to no tethering 2680 // gservices could set the secure setting to 1 though to enable it on a build where it 2681 // had previously been turned off. 2682 public boolean isTetheringSupported() { 2683 enforceTetherAccessPermission(); 2684 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2685 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2686 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2687 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2688 return tetherEnabledInSettings && ((mTethering.getTetherableUsbRegexs().length != 0 || 2689 mTethering.getTetherableWifiRegexs().length != 0 || 2690 mTethering.getTetherableBluetoothRegexs().length != 0) && 2691 mTethering.getUpstreamIfaceTypes().length != 0); 2692 } 2693 2694 // Called when we lose the default network and have no replacement yet. 2695 // This will automatically be cleared after X seconds or a new default network 2696 // becomes CONNECTED, whichever happens first. The timer is started by the 2697 // first caller and not restarted by subsequent callers. 2698 private void requestNetworkTransitionWakelock(String forWhom) { 2699 int serialNum = 0; 2700 synchronized (this) { 2701 if (mNetTransitionWakeLock.isHeld()) return; 2702 serialNum = ++mNetTransitionWakeLockSerialNumber; 2703 mNetTransitionWakeLock.acquire(); 2704 mNetTransitionWakeLockCausedBy = forWhom; 2705 } 2706 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2707 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2708 mNetTransitionWakeLockTimeout); 2709 return; 2710 } 2711 2712 // 100 percent is full good, 0 is full bad. 2713 public void reportInetCondition(int networkType, int percentage) { 2714 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2715 if (nai == null) return; 2716 reportNetworkConnectivity(nai.network, percentage > 50); 2717 } 2718 2719 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2720 enforceAccessPermission(); 2721 enforceInternetPermission(); 2722 2723 NetworkAgentInfo nai; 2724 if (network == null) { 2725 nai = getDefaultNetwork(); 2726 } else { 2727 nai = getNetworkAgentInfoForNetwork(network); 2728 } 2729 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2730 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2731 return; 2732 } 2733 // Revalidate if the app report does not match our current validated state. 2734 if (hasConnectivity == nai.lastValidated) return; 2735 final int uid = Binder.getCallingUid(); 2736 if (DBG) { 2737 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2738 ") by " + uid); 2739 } 2740 synchronized (nai) { 2741 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2742 // which isn't meant to work on uncreated networks. 2743 if (!nai.created) return; 2744 2745 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2746 2747 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2748 } 2749 } 2750 2751 private ProxyInfo getDefaultProxy() { 2752 // this information is already available as a world read/writable jvm property 2753 // so this API change wouldn't have a benifit. It also breaks the passing 2754 // of proxy info to all the JVMs. 2755 // enforceAccessPermission(); 2756 synchronized (mProxyLock) { 2757 ProxyInfo ret = mGlobalProxy; 2758 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2759 return ret; 2760 } 2761 } 2762 2763 public ProxyInfo getProxyForNetwork(Network network) { 2764 if (network == null) return getDefaultProxy(); 2765 final ProxyInfo globalProxy = getGlobalProxy(); 2766 if (globalProxy != null) return globalProxy; 2767 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 2768 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 2769 // caller may not have. 2770 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2771 if (nai == null) return null; 2772 synchronized (nai) { 2773 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 2774 if (proxyInfo == null) return null; 2775 return new ProxyInfo(proxyInfo); 2776 } 2777 } 2778 2779 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2780 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2781 // proxy is null then there is no proxy in place). 2782 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2783 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2784 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2785 proxy = null; 2786 } 2787 return proxy; 2788 } 2789 2790 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2791 // better for determining if a new proxy broadcast is necessary: 2792 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2793 // avoid unnecessary broadcasts. 2794 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2795 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2796 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2797 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2798 // all set. 2799 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2800 a = canonicalizeProxyInfo(a); 2801 b = canonicalizeProxyInfo(b); 2802 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2803 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2804 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2805 } 2806 2807 public void setGlobalProxy(ProxyInfo proxyProperties) { 2808 enforceConnectivityInternalPermission(); 2809 2810 synchronized (mProxyLock) { 2811 if (proxyProperties == mGlobalProxy) return; 2812 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2813 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2814 2815 String host = ""; 2816 int port = 0; 2817 String exclList = ""; 2818 String pacFileUrl = ""; 2819 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2820 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2821 if (!proxyProperties.isValid()) { 2822 if (DBG) 2823 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2824 return; 2825 } 2826 mGlobalProxy = new ProxyInfo(proxyProperties); 2827 host = mGlobalProxy.getHost(); 2828 port = mGlobalProxy.getPort(); 2829 exclList = mGlobalProxy.getExclusionListAsString(); 2830 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2831 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2832 } 2833 } else { 2834 mGlobalProxy = null; 2835 } 2836 ContentResolver res = mContext.getContentResolver(); 2837 final long token = Binder.clearCallingIdentity(); 2838 try { 2839 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2840 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2841 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2842 exclList); 2843 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2844 } finally { 2845 Binder.restoreCallingIdentity(token); 2846 } 2847 2848 if (mGlobalProxy == null) { 2849 proxyProperties = mDefaultProxy; 2850 } 2851 sendProxyBroadcast(proxyProperties); 2852 } 2853 } 2854 2855 private void loadGlobalProxy() { 2856 ContentResolver res = mContext.getContentResolver(); 2857 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2858 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2859 String exclList = Settings.Global.getString(res, 2860 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2861 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2862 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2863 ProxyInfo proxyProperties; 2864 if (!TextUtils.isEmpty(pacFileUrl)) { 2865 proxyProperties = new ProxyInfo(pacFileUrl); 2866 } else { 2867 proxyProperties = new ProxyInfo(host, port, exclList); 2868 } 2869 if (!proxyProperties.isValid()) { 2870 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2871 return; 2872 } 2873 2874 synchronized (mProxyLock) { 2875 mGlobalProxy = proxyProperties; 2876 } 2877 } 2878 } 2879 2880 public ProxyInfo getGlobalProxy() { 2881 // this information is already available as a world read/writable jvm property 2882 // so this API change wouldn't have a benifit. It also breaks the passing 2883 // of proxy info to all the JVMs. 2884 // enforceAccessPermission(); 2885 synchronized (mProxyLock) { 2886 return mGlobalProxy; 2887 } 2888 } 2889 2890 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2891 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2892 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2893 proxy = null; 2894 } 2895 synchronized (mProxyLock) { 2896 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2897 if (mDefaultProxy == proxy) return; // catches repeated nulls 2898 if (proxy != null && !proxy.isValid()) { 2899 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2900 return; 2901 } 2902 2903 // This call could be coming from the PacManager, containing the port of the local 2904 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2905 // global (to get the correct local port), and send a broadcast. 2906 // TODO: Switch PacManager to have its own message to send back rather than 2907 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2908 if ((mGlobalProxy != null) && (proxy != null) 2909 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2910 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2911 mGlobalProxy = proxy; 2912 sendProxyBroadcast(mGlobalProxy); 2913 return; 2914 } 2915 mDefaultProxy = proxy; 2916 2917 if (mGlobalProxy != null) return; 2918 if (!mDefaultProxyDisabled) { 2919 sendProxyBroadcast(proxy); 2920 } 2921 } 2922 } 2923 2924 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2925 // This method gets called when any network changes proxy, but the broadcast only ever contains 2926 // the default proxy (even if it hasn't changed). 2927 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2928 // world where an app might be bound to a non-default network. 2929 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2930 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2931 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2932 2933 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2934 sendProxyBroadcast(getDefaultProxy()); 2935 } 2936 } 2937 2938 private void handleDeprecatedGlobalHttpProxy() { 2939 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2940 Settings.Global.HTTP_PROXY); 2941 if (!TextUtils.isEmpty(proxy)) { 2942 String data[] = proxy.split(":"); 2943 if (data.length == 0) { 2944 return; 2945 } 2946 2947 String proxyHost = data[0]; 2948 int proxyPort = 8080; 2949 if (data.length > 1) { 2950 try { 2951 proxyPort = Integer.parseInt(data[1]); 2952 } catch (NumberFormatException e) { 2953 return; 2954 } 2955 } 2956 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2957 setGlobalProxy(p); 2958 } 2959 } 2960 2961 private void sendProxyBroadcast(ProxyInfo proxy) { 2962 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2963 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2964 if (DBG) log("sending Proxy Broadcast for " + proxy); 2965 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2966 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2967 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2968 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2969 final long ident = Binder.clearCallingIdentity(); 2970 try { 2971 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2972 } finally { 2973 Binder.restoreCallingIdentity(ident); 2974 } 2975 } 2976 2977 private static class SettingsObserver extends ContentObserver { 2978 final private HashMap<Uri, Integer> mUriEventMap; 2979 final private Context mContext; 2980 final private Handler mHandler; 2981 2982 SettingsObserver(Context context, Handler handler) { 2983 super(null); 2984 mUriEventMap = new HashMap<Uri, Integer>(); 2985 mContext = context; 2986 mHandler = handler; 2987 } 2988 2989 void observe(Uri uri, int what) { 2990 mUriEventMap.put(uri, what); 2991 final ContentResolver resolver = mContext.getContentResolver(); 2992 resolver.registerContentObserver(uri, false, this); 2993 } 2994 2995 @Override 2996 public void onChange(boolean selfChange) { 2997 Slog.wtf(TAG, "Should never be reached."); 2998 } 2999 3000 @Override 3001 public void onChange(boolean selfChange, Uri uri) { 3002 final Integer what = mUriEventMap.get(uri); 3003 if (what != null) { 3004 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3005 } else { 3006 loge("No matching event to send for URI=" + uri); 3007 } 3008 } 3009 } 3010 3011 private static void log(String s) { 3012 Slog.d(TAG, s); 3013 } 3014 3015 private static void loge(String s) { 3016 Slog.e(TAG, s); 3017 } 3018 3019 private static <T> T checkNotNull(T value, String message) { 3020 if (value == null) { 3021 throw new NullPointerException(message); 3022 } 3023 return value; 3024 } 3025 3026 /** 3027 * Prepare for a VPN application. 3028 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3029 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3030 * 3031 * @param oldPackage Package name of the application which currently controls VPN, which will 3032 * be replaced. If there is no such application, this should should either be 3033 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3034 * @param newPackage Package name of the application which should gain control of VPN, or 3035 * {@code null} to disable. 3036 * @param userId User for whom to prepare the new VPN. 3037 * 3038 * @hide 3039 */ 3040 @Override 3041 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3042 int userId) { 3043 enforceCrossUserPermission(userId); 3044 throwIfLockdownEnabled(); 3045 3046 synchronized(mVpns) { 3047 Vpn vpn = mVpns.get(userId); 3048 if (vpn != null) { 3049 return vpn.prepare(oldPackage, newPackage); 3050 } else { 3051 return false; 3052 } 3053 } 3054 } 3055 3056 /** 3057 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3058 * This method is used by system-privileged apps. 3059 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3060 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3061 * 3062 * @param packageName The package for which authorization state should change. 3063 * @param userId User for whom {@code packageName} is installed. 3064 * @param authorized {@code true} if this app should be able to start a VPN connection without 3065 * explicit user approval, {@code false} if not. 3066 * 3067 * @hide 3068 */ 3069 @Override 3070 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3071 enforceCrossUserPermission(userId); 3072 3073 synchronized(mVpns) { 3074 Vpn vpn = mVpns.get(userId); 3075 if (vpn != null) { 3076 vpn.setPackageAuthorization(packageName, authorized); 3077 } 3078 } 3079 } 3080 3081 /** 3082 * Configure a TUN interface and return its file descriptor. Parameters 3083 * are encoded and opaque to this class. This method is used by VpnBuilder 3084 * and not available in ConnectivityManager. Permissions are checked in 3085 * Vpn class. 3086 * @hide 3087 */ 3088 @Override 3089 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3090 throwIfLockdownEnabled(); 3091 int user = UserHandle.getUserId(Binder.getCallingUid()); 3092 synchronized(mVpns) { 3093 return mVpns.get(user).establish(config); 3094 } 3095 } 3096 3097 /** 3098 * Start legacy VPN, controlling native daemons as needed. Creates a 3099 * secondary thread to perform connection work, returning quickly. 3100 */ 3101 @Override 3102 public void startLegacyVpn(VpnProfile profile) { 3103 throwIfLockdownEnabled(); 3104 final LinkProperties egress = getActiveLinkProperties(); 3105 if (egress == null) { 3106 throw new IllegalStateException("Missing active network connection"); 3107 } 3108 int user = UserHandle.getUserId(Binder.getCallingUid()); 3109 synchronized(mVpns) { 3110 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3111 } 3112 } 3113 3114 /** 3115 * Return the information of the ongoing legacy VPN. This method is used 3116 * by VpnSettings and not available in ConnectivityManager. Permissions 3117 * are checked in Vpn class. 3118 */ 3119 @Override 3120 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3121 enforceCrossUserPermission(userId); 3122 if (mLockdownEnabled) { 3123 return null; 3124 } 3125 3126 synchronized(mVpns) { 3127 return mVpns.get(userId).getLegacyVpnInfo(); 3128 } 3129 } 3130 3131 /** 3132 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3133 * and not available in ConnectivityManager. 3134 */ 3135 @Override 3136 public VpnInfo[] getAllVpnInfo() { 3137 enforceConnectivityInternalPermission(); 3138 if (mLockdownEnabled) { 3139 return new VpnInfo[0]; 3140 } 3141 3142 synchronized(mVpns) { 3143 List<VpnInfo> infoList = new ArrayList<>(); 3144 for (int i = 0; i < mVpns.size(); i++) { 3145 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3146 if (info != null) { 3147 infoList.add(info); 3148 } 3149 } 3150 return infoList.toArray(new VpnInfo[infoList.size()]); 3151 } 3152 } 3153 3154 /** 3155 * @return VPN information for accounting, or null if we can't retrieve all required 3156 * information, e.g primary underlying iface. 3157 */ 3158 @Nullable 3159 private VpnInfo createVpnInfo(Vpn vpn) { 3160 VpnInfo info = vpn.getVpnInfo(); 3161 if (info == null) { 3162 return null; 3163 } 3164 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3165 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3166 // the underlyingNetworks list. 3167 if (underlyingNetworks == null) { 3168 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3169 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3170 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3171 } 3172 } else if (underlyingNetworks.length > 0) { 3173 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3174 if (linkProperties != null) { 3175 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3176 } 3177 } 3178 return info.primaryUnderlyingIface == null ? null : info; 3179 } 3180 3181 /** 3182 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3183 * VpnDialogs and not available in ConnectivityManager. 3184 * Permissions are checked in Vpn class. 3185 * @hide 3186 */ 3187 @Override 3188 public VpnConfig getVpnConfig(int userId) { 3189 enforceCrossUserPermission(userId); 3190 synchronized(mVpns) { 3191 Vpn vpn = mVpns.get(userId); 3192 if (vpn != null) { 3193 return vpn.getVpnConfig(); 3194 } else { 3195 return null; 3196 } 3197 } 3198 } 3199 3200 @Override 3201 public boolean updateLockdownVpn() { 3202 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3203 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3204 return false; 3205 } 3206 3207 // Tear down existing lockdown if profile was removed 3208 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3209 if (mLockdownEnabled) { 3210 if (!mKeyStore.isUnlocked()) { 3211 Slog.w(TAG, "KeyStore locked; unable to create LockdownTracker"); 3212 return false; 3213 } 3214 3215 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3216 final VpnProfile profile = VpnProfile.decode( 3217 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3218 int user = UserHandle.getUserId(Binder.getCallingUid()); 3219 synchronized(mVpns) { 3220 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, mVpns.get(user), 3221 profile)); 3222 } 3223 } else { 3224 setLockdownTracker(null); 3225 } 3226 3227 return true; 3228 } 3229 3230 /** 3231 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3232 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3233 */ 3234 private void setLockdownTracker(LockdownVpnTracker tracker) { 3235 // Shutdown any existing tracker 3236 final LockdownVpnTracker existing = mLockdownTracker; 3237 mLockdownTracker = null; 3238 if (existing != null) { 3239 existing.shutdown(); 3240 } 3241 3242 try { 3243 if (tracker != null) { 3244 mNetd.setFirewallEnabled(true); 3245 mNetd.setFirewallInterfaceRule("lo", true); 3246 mLockdownTracker = tracker; 3247 mLockdownTracker.init(); 3248 } else { 3249 mNetd.setFirewallEnabled(false); 3250 } 3251 } catch (RemoteException e) { 3252 // ignored; NMS lives inside system_server 3253 } 3254 } 3255 3256 private void throwIfLockdownEnabled() { 3257 if (mLockdownEnabled) { 3258 throw new IllegalStateException("Unavailable in lockdown mode"); 3259 } 3260 } 3261 3262 @Override 3263 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3264 // TODO: Remove? Any reason to trigger a provisioning check? 3265 return -1; 3266 } 3267 3268 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3269 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3270 3271 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3272 if (DBG) { 3273 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3274 + " action=" + action); 3275 } 3276 Intent intent = new Intent(action); 3277 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3278 // Concatenate the range of types onto the range of NetIDs. 3279 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3280 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3281 networkType, null, pendingIntent, false); 3282 } 3283 3284 /** 3285 * Show or hide network provisioning notifications. 3286 * 3287 * We use notifications for two purposes: to notify that a network requires sign in 3288 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3289 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3290 * particular network we can display the notification type that was most recently requested. 3291 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3292 * might first display NO_INTERNET, and then when the captive portal check completes, display 3293 * SIGN_IN. 3294 * 3295 * @param id an identifier that uniquely identifies this notification. This must match 3296 * between show and hide calls. We use the NetID value but for legacy callers 3297 * we concatenate the range of types with the range of NetIDs. 3298 */ 3299 private void setProvNotificationVisibleIntent(boolean visible, int id, 3300 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3301 boolean highPriority) { 3302 if (DBG) { 3303 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3304 + " networkType=" + getNetworkTypeName(networkType) 3305 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3306 } 3307 3308 Resources r = Resources.getSystem(); 3309 NotificationManager notificationManager = (NotificationManager) mContext 3310 .getSystemService(Context.NOTIFICATION_SERVICE); 3311 3312 if (visible) { 3313 CharSequence title; 3314 CharSequence details; 3315 int icon; 3316 if (notifyType == NotificationType.NO_INTERNET && 3317 networkType == ConnectivityManager.TYPE_WIFI) { 3318 title = r.getString(R.string.wifi_no_internet, 0); 3319 details = r.getString(R.string.wifi_no_internet_detailed); 3320 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3321 } else if (notifyType == NotificationType.SIGN_IN) { 3322 switch (networkType) { 3323 case ConnectivityManager.TYPE_WIFI: 3324 title = r.getString(R.string.wifi_available_sign_in, 0); 3325 details = r.getString(R.string.network_available_sign_in_detailed, 3326 extraInfo); 3327 icon = R.drawable.stat_notify_wifi_in_range; 3328 break; 3329 case ConnectivityManager.TYPE_MOBILE: 3330 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3331 title = r.getString(R.string.network_available_sign_in, 0); 3332 // TODO: Change this to pull from NetworkInfo once a printable 3333 // name has been added to it 3334 details = mTelephonyManager.getNetworkOperatorName(); 3335 icon = R.drawable.stat_notify_rssi_in_range; 3336 break; 3337 default: 3338 title = r.getString(R.string.network_available_sign_in, 0); 3339 details = r.getString(R.string.network_available_sign_in_detailed, 3340 extraInfo); 3341 icon = R.drawable.stat_notify_rssi_in_range; 3342 break; 3343 } 3344 } else { 3345 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3346 + getNetworkTypeName(networkType)); 3347 return; 3348 } 3349 3350 Notification notification = new Notification.Builder(mContext) 3351 .setWhen(0) 3352 .setSmallIcon(icon) 3353 .setAutoCancel(true) 3354 .setTicker(title) 3355 .setColor(mContext.getColor( 3356 com.android.internal.R.color.system_notification_accent_color)) 3357 .setContentTitle(title) 3358 .setContentText(details) 3359 .setContentIntent(intent) 3360 .setLocalOnly(true) 3361 .setPriority(highPriority ? 3362 Notification.PRIORITY_HIGH : 3363 Notification.PRIORITY_DEFAULT) 3364 .setDefaults(Notification.DEFAULT_ALL) 3365 .setOnlyAlertOnce(true) 3366 .build(); 3367 3368 try { 3369 notificationManager.notify(NOTIFICATION_ID, id, notification); 3370 } catch (NullPointerException npe) { 3371 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3372 npe.printStackTrace(); 3373 } 3374 } else { 3375 try { 3376 notificationManager.cancel(NOTIFICATION_ID, id); 3377 } catch (NullPointerException npe) { 3378 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3379 npe.printStackTrace(); 3380 } 3381 } 3382 } 3383 3384 /** Location to an updatable file listing carrier provisioning urls. 3385 * An example: 3386 * 3387 * <?xml version="1.0" encoding="utf-8"?> 3388 * <provisioningUrls> 3389 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3390 * </provisioningUrls> 3391 */ 3392 private static final String PROVISIONING_URL_PATH = 3393 "/data/misc/radio/provisioning_urls.xml"; 3394 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3395 3396 /** XML tag for root element. */ 3397 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3398 /** XML tag for individual url */ 3399 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3400 /** XML attribute for mcc */ 3401 private static final String ATTR_MCC = "mcc"; 3402 /** XML attribute for mnc */ 3403 private static final String ATTR_MNC = "mnc"; 3404 3405 private String getProvisioningUrlBaseFromFile() { 3406 FileReader fileReader = null; 3407 XmlPullParser parser = null; 3408 Configuration config = mContext.getResources().getConfiguration(); 3409 3410 try { 3411 fileReader = new FileReader(mProvisioningUrlFile); 3412 parser = Xml.newPullParser(); 3413 parser.setInput(fileReader); 3414 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3415 3416 while (true) { 3417 XmlUtils.nextElement(parser); 3418 3419 String element = parser.getName(); 3420 if (element == null) break; 3421 3422 if (element.equals(TAG_PROVISIONING_URL)) { 3423 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3424 try { 3425 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3426 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3427 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3428 parser.next(); 3429 if (parser.getEventType() == XmlPullParser.TEXT) { 3430 return parser.getText(); 3431 } 3432 } 3433 } 3434 } catch (NumberFormatException e) { 3435 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3436 } 3437 } 3438 } 3439 return null; 3440 } catch (FileNotFoundException e) { 3441 loge("Carrier Provisioning Urls file not found"); 3442 } catch (XmlPullParserException e) { 3443 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3444 } catch (IOException e) { 3445 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3446 } finally { 3447 if (fileReader != null) { 3448 try { 3449 fileReader.close(); 3450 } catch (IOException e) {} 3451 } 3452 } 3453 return null; 3454 } 3455 3456 @Override 3457 public String getMobileProvisioningUrl() { 3458 enforceConnectivityInternalPermission(); 3459 String url = getProvisioningUrlBaseFromFile(); 3460 if (TextUtils.isEmpty(url)) { 3461 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3462 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3463 } else { 3464 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3465 } 3466 // populate the iccid, imei and phone number in the provisioning url. 3467 if (!TextUtils.isEmpty(url)) { 3468 String phoneNumber = mTelephonyManager.getLine1Number(); 3469 if (TextUtils.isEmpty(phoneNumber)) { 3470 phoneNumber = "0000000000"; 3471 } 3472 url = String.format(url, 3473 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3474 mTelephonyManager.getDeviceId() /* IMEI */, 3475 phoneNumber /* Phone numer */); 3476 } 3477 3478 return url; 3479 } 3480 3481 @Override 3482 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3483 String action) { 3484 enforceConnectivityInternalPermission(); 3485 final long ident = Binder.clearCallingIdentity(); 3486 try { 3487 setProvNotificationVisible(visible, networkType, action); 3488 } finally { 3489 Binder.restoreCallingIdentity(ident); 3490 } 3491 } 3492 3493 @Override 3494 public void setAirplaneMode(boolean enable) { 3495 enforceConnectivityInternalPermission(); 3496 final long ident = Binder.clearCallingIdentity(); 3497 try { 3498 final ContentResolver cr = mContext.getContentResolver(); 3499 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3500 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3501 intent.putExtra("state", enable); 3502 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3503 } finally { 3504 Binder.restoreCallingIdentity(ident); 3505 } 3506 } 3507 3508 private void onUserStart(int userId) { 3509 synchronized(mVpns) { 3510 Vpn userVpn = mVpns.get(userId); 3511 if (userVpn != null) { 3512 loge("Starting user already has a VPN"); 3513 return; 3514 } 3515 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3516 mVpns.put(userId, userVpn); 3517 } 3518 } 3519 3520 private void onUserStop(int userId) { 3521 synchronized(mVpns) { 3522 Vpn userVpn = mVpns.get(userId); 3523 if (userVpn == null) { 3524 loge("Stopping user has no VPN"); 3525 return; 3526 } 3527 mVpns.delete(userId); 3528 } 3529 } 3530 3531 private void onUserAdded(int userId) { 3532 synchronized(mVpns) { 3533 final int vpnsSize = mVpns.size(); 3534 for (int i = 0; i < vpnsSize; i++) { 3535 Vpn vpn = mVpns.valueAt(i); 3536 vpn.onUserAdded(userId); 3537 } 3538 } 3539 } 3540 3541 private void onUserRemoved(int userId) { 3542 synchronized(mVpns) { 3543 final int vpnsSize = mVpns.size(); 3544 for (int i = 0; i < vpnsSize; i++) { 3545 Vpn vpn = mVpns.valueAt(i); 3546 vpn.onUserRemoved(userId); 3547 } 3548 } 3549 } 3550 3551 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3552 @Override 3553 public void onReceive(Context context, Intent intent) { 3554 final String action = intent.getAction(); 3555 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3556 if (userId == UserHandle.USER_NULL) return; 3557 3558 if (Intent.ACTION_USER_STARTING.equals(action)) { 3559 onUserStart(userId); 3560 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3561 onUserStop(userId); 3562 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3563 onUserAdded(userId); 3564 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3565 onUserRemoved(userId); 3566 } 3567 } 3568 }; 3569 3570 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3571 new HashMap<Messenger, NetworkFactoryInfo>(); 3572 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3573 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3574 3575 private static class NetworkFactoryInfo { 3576 public final String name; 3577 public final Messenger messenger; 3578 public final AsyncChannel asyncChannel; 3579 3580 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3581 this.name = name; 3582 this.messenger = messenger; 3583 this.asyncChannel = asyncChannel; 3584 } 3585 } 3586 3587 /** 3588 * Tracks info about the requester. 3589 * Also used to notice when the calling process dies so we can self-expire 3590 */ 3591 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3592 static final boolean REQUEST = true; 3593 static final boolean LISTEN = false; 3594 3595 final NetworkRequest request; 3596 final PendingIntent mPendingIntent; 3597 boolean mPendingIntentSent; 3598 private final IBinder mBinder; 3599 final int mPid; 3600 final int mUid; 3601 final Messenger messenger; 3602 final boolean isRequest; 3603 3604 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, boolean isRequest) { 3605 request = r; 3606 mPendingIntent = pi; 3607 messenger = null; 3608 mBinder = null; 3609 mPid = getCallingPid(); 3610 mUid = getCallingUid(); 3611 this.isRequest = isRequest; 3612 } 3613 3614 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, boolean isRequest) { 3615 super(); 3616 messenger = m; 3617 request = r; 3618 mBinder = binder; 3619 mPid = getCallingPid(); 3620 mUid = getCallingUid(); 3621 this.isRequest = isRequest; 3622 mPendingIntent = null; 3623 3624 try { 3625 mBinder.linkToDeath(this, 0); 3626 } catch (RemoteException e) { 3627 binderDied(); 3628 } 3629 } 3630 3631 void unlinkDeathRecipient() { 3632 if (mBinder != null) { 3633 mBinder.unlinkToDeath(this, 0); 3634 } 3635 } 3636 3637 public void binderDied() { 3638 log("ConnectivityService NetworkRequestInfo binderDied(" + 3639 request + ", " + mBinder + ")"); 3640 releaseNetworkRequest(request); 3641 } 3642 3643 public String toString() { 3644 return (isRequest ? "Request" : "Listen") + 3645 " from uid/pid:" + mUid + "/" + mPid + 3646 " for " + request + 3647 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3648 } 3649 } 3650 3651 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3652 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3653 if (badCapability != null) { 3654 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3655 } 3656 } 3657 3658 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3659 final SortedSet<Integer> thresholds = new TreeSet(); 3660 synchronized (nai) { 3661 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3662 if (nri.request.networkCapabilities.hasSignalStrength() && 3663 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3664 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3665 } 3666 } 3667 } 3668 return new ArrayList<Integer>(thresholds); 3669 } 3670 3671 private void updateSignalStrengthThresholds( 3672 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3673 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3674 Bundle thresholds = new Bundle(); 3675 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3676 3677 // TODO: Switch to VDBG. 3678 if (DBG) { 3679 String detail; 3680 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3681 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3682 } else { 3683 detail = reason; 3684 } 3685 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3686 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3687 } 3688 3689 nai.asyncChannel.sendMessage( 3690 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3691 0, 0, thresholds); 3692 } 3693 3694 @Override 3695 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3696 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3697 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3698 enforceNetworkRequestPermissions(networkCapabilities); 3699 enforceMeteredApnPolicy(networkCapabilities); 3700 ensureRequestableCapabilities(networkCapabilities); 3701 3702 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3703 throw new IllegalArgumentException("Bad timeout specified"); 3704 } 3705 3706 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3707 nextNetworkRequestId()); 3708 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3709 NetworkRequestInfo.REQUEST); 3710 if (DBG) log("requestNetwork for " + nri); 3711 3712 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3713 if (timeoutMs > 0) { 3714 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3715 nri), timeoutMs); 3716 } 3717 return networkRequest; 3718 } 3719 3720 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3721 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 3722 enforceConnectivityInternalPermission(); 3723 } else { 3724 enforceChangePermission(); 3725 } 3726 } 3727 3728 @Override 3729 public boolean requestBandwidthUpdate(Network network) { 3730 enforceAccessPermission(); 3731 NetworkAgentInfo nai = null; 3732 if (network == null) { 3733 return false; 3734 } 3735 synchronized (mNetworkForNetId) { 3736 nai = mNetworkForNetId.get(network.netId); 3737 } 3738 if (nai != null) { 3739 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3740 return true; 3741 } 3742 return false; 3743 } 3744 3745 3746 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3747 // if UID is restricted, don't allow them to bring up metered APNs 3748 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 3749 final int uidRules; 3750 final int uid = Binder.getCallingUid(); 3751 synchronized(mRulesLock) { 3752 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3753 } 3754 if ((uidRules & (RULE_REJECT_METERED | RULE_REJECT_ALL)) != 0) { 3755 // we could silently fail or we can filter the available nets to only give 3756 // them those they have access to. Chose the more useful 3757 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 3758 } 3759 } 3760 } 3761 3762 @Override 3763 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3764 PendingIntent operation) { 3765 checkNotNull(operation, "PendingIntent cannot be null."); 3766 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3767 enforceNetworkRequestPermissions(networkCapabilities); 3768 enforceMeteredApnPolicy(networkCapabilities); 3769 ensureRequestableCapabilities(networkCapabilities); 3770 3771 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3772 nextNetworkRequestId()); 3773 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3774 NetworkRequestInfo.REQUEST); 3775 if (DBG) log("pendingRequest for " + nri); 3776 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3777 nri)); 3778 return networkRequest; 3779 } 3780 3781 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3782 mHandler.sendMessageDelayed( 3783 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3784 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3785 } 3786 3787 @Override 3788 public void releasePendingNetworkRequest(PendingIntent operation) { 3789 checkNotNull(operation, "PendingIntent cannot be null."); 3790 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3791 getCallingUid(), 0, operation)); 3792 } 3793 3794 // In order to implement the compatibility measure for pre-M apps that call 3795 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 3796 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 3797 // This ensures it has permission to do so. 3798 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 3799 if (nc == null) { 3800 return false; 3801 } 3802 int[] transportTypes = nc.getTransportTypes(); 3803 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 3804 return false; 3805 } 3806 try { 3807 mContext.enforceCallingOrSelfPermission( 3808 android.Manifest.permission.ACCESS_WIFI_STATE, 3809 "ConnectivityService"); 3810 } catch (SecurityException e) { 3811 return false; 3812 } 3813 return true; 3814 } 3815 3816 @Override 3817 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 3818 Messenger messenger, IBinder binder) { 3819 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3820 enforceAccessPermission(); 3821 } 3822 3823 NetworkRequest networkRequest = new NetworkRequest( 3824 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3825 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3826 NetworkRequestInfo.LISTEN); 3827 if (DBG) log("listenForNetwork for " + nri); 3828 3829 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3830 return networkRequest; 3831 } 3832 3833 @Override 3834 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 3835 PendingIntent operation) { 3836 checkNotNull(operation, "PendingIntent cannot be null."); 3837 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3838 enforceAccessPermission(); 3839 } 3840 3841 NetworkRequest networkRequest = new NetworkRequest( 3842 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3843 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3844 NetworkRequestInfo.LISTEN); 3845 if (DBG) log("pendingListenForNetwork for " + nri); 3846 3847 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3848 } 3849 3850 @Override 3851 public void releaseNetworkRequest(NetworkRequest networkRequest) { 3852 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 3853 0, networkRequest)); 3854 } 3855 3856 @Override 3857 public void registerNetworkFactory(Messenger messenger, String name) { 3858 enforceConnectivityInternalPermission(); 3859 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 3860 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 3861 } 3862 3863 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 3864 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 3865 mNetworkFactoryInfos.put(nfi.messenger, nfi); 3866 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 3867 } 3868 3869 @Override 3870 public void unregisterNetworkFactory(Messenger messenger) { 3871 enforceConnectivityInternalPermission(); 3872 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 3873 } 3874 3875 private void handleUnregisterNetworkFactory(Messenger messenger) { 3876 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 3877 if (nfi == null) { 3878 loge("Failed to find Messenger in unregisterNetworkFactory"); 3879 return; 3880 } 3881 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 3882 } 3883 3884 /** 3885 * NetworkAgentInfo supporting a request by requestId. 3886 * These have already been vetted (their Capabilities satisfy the request) 3887 * and the are the highest scored network available. 3888 * the are keyed off the Requests requestId. 3889 */ 3890 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 3891 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 3892 new SparseArray<NetworkAgentInfo>(); 3893 3894 // NOTE: Accessed on multiple threads, must be synchronized on itself. 3895 @GuardedBy("mNetworkForNetId") 3896 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 3897 new SparseArray<NetworkAgentInfo>(); 3898 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 3899 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 3900 // there may not be a strict 1:1 correlation between the two. 3901 @GuardedBy("mNetworkForNetId") 3902 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 3903 3904 // NetworkAgentInfo keyed off its connecting messenger 3905 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 3906 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 3907 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 3908 new HashMap<Messenger, NetworkAgentInfo>(); 3909 3910 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 3911 private final NetworkRequest mDefaultRequest; 3912 3913 // Request used to optionally keep mobile data active even when higher 3914 // priority networks like Wi-Fi are active. 3915 private final NetworkRequest mDefaultMobileDataRequest; 3916 3917 private NetworkAgentInfo getDefaultNetwork() { 3918 return mNetworkForRequestId.get(mDefaultRequest.requestId); 3919 } 3920 3921 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 3922 return nai == getDefaultNetwork(); 3923 } 3924 3925 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 3926 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 3927 int currentScore, NetworkMisc networkMisc) { 3928 enforceConnectivityInternalPermission(); 3929 3930 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 3931 // satisfies mDefaultRequest. 3932 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 3933 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 3934 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 3935 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 3936 synchronized (this) { 3937 nai.networkMonitor.systemReady = mSystemReady; 3938 } 3939 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network); 3940 if (DBG) log("registerNetworkAgent " + nai); 3941 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 3942 return nai.network.netId; 3943 } 3944 3945 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 3946 if (VDBG) log("Got NetworkAgent Messenger"); 3947 mNetworkAgentInfos.put(na.messenger, na); 3948 synchronized (mNetworkForNetId) { 3949 mNetworkForNetId.put(na.network.netId, na); 3950 } 3951 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 3952 NetworkInfo networkInfo = na.networkInfo; 3953 na.networkInfo = null; 3954 updateNetworkInfo(na, networkInfo); 3955 } 3956 3957 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 3958 LinkProperties newLp = networkAgent.linkProperties; 3959 int netId = networkAgent.network.netId; 3960 3961 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 3962 // we do anything else, make sure its LinkProperties are accurate. 3963 if (networkAgent.clatd != null) { 3964 networkAgent.clatd.fixupLinkProperties(oldLp); 3965 } 3966 3967 updateInterfaces(newLp, oldLp, netId); 3968 updateMtu(newLp, oldLp); 3969 // TODO - figure out what to do for clat 3970// for (LinkProperties lp : newLp.getStackedLinks()) { 3971// updateMtu(lp, null); 3972// } 3973 updateTcpBufferSizes(networkAgent); 3974 3975 // TODO: deprecate and remove mDefaultDns when we can do so safely. See http://b/18327075 3976 // In L, we used it only when the network had Internet access but provided no DNS servers. 3977 // For now, just disable it, and if disabling it doesn't break things, remove it. 3978 // final boolean useDefaultDns = networkAgent.networkCapabilities.hasCapability( 3979 // NET_CAPABILITY_INTERNET); 3980 final boolean useDefaultDns = false; 3981 final boolean flushDns = updateRoutes(newLp, oldLp, netId); 3982 updateDnses(newLp, oldLp, netId, flushDns, useDefaultDns); 3983 3984 updateClat(newLp, oldLp, networkAgent); 3985 if (isDefaultNetwork(networkAgent)) { 3986 handleApplyDefaultProxy(newLp.getHttpProxy()); 3987 } else { 3988 updateProxy(newLp, oldLp, networkAgent); 3989 } 3990 // TODO - move this check to cover the whole function 3991 if (!Objects.equals(newLp, oldLp)) { 3992 notifyIfacesChanged(); 3993 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 3994 } 3995 3996 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 3997 } 3998 3999 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4000 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4001 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4002 4003 if (!wasRunningClat && shouldRunClat) { 4004 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4005 nai.clatd.start(); 4006 } else if (wasRunningClat && !shouldRunClat) { 4007 nai.clatd.stop(); 4008 } 4009 } 4010 4011 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4012 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4013 if (oldLp != null) { 4014 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4015 } else if (newLp != null) { 4016 interfaceDiff.added = newLp.getAllInterfaceNames(); 4017 } 4018 for (String iface : interfaceDiff.added) { 4019 try { 4020 if (DBG) log("Adding iface " + iface + " to network " + netId); 4021 mNetd.addInterfaceToNetwork(iface, netId); 4022 } catch (Exception e) { 4023 loge("Exception adding interface: " + e); 4024 } 4025 } 4026 for (String iface : interfaceDiff.removed) { 4027 try { 4028 if (DBG) log("Removing iface " + iface + " from network " + netId); 4029 mNetd.removeInterfaceFromNetwork(iface, netId); 4030 } catch (Exception e) { 4031 loge("Exception removing interface: " + e); 4032 } 4033 } 4034 } 4035 4036 /** 4037 * Have netd update routes from oldLp to newLp. 4038 * @return true if routes changed between oldLp and newLp 4039 */ 4040 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4041 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4042 if (oldLp != null) { 4043 routeDiff = oldLp.compareAllRoutes(newLp); 4044 } else if (newLp != null) { 4045 routeDiff.added = newLp.getAllRoutes(); 4046 } 4047 4048 // add routes before removing old in case it helps with continuous connectivity 4049 4050 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4051 for (RouteInfo route : routeDiff.added) { 4052 if (route.hasGateway()) continue; 4053 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4054 try { 4055 mNetd.addRoute(netId, route); 4056 } catch (Exception e) { 4057 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4058 loge("Exception in addRoute for non-gateway: " + e); 4059 } 4060 } 4061 } 4062 for (RouteInfo route : routeDiff.added) { 4063 if (route.hasGateway() == false) continue; 4064 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4065 try { 4066 mNetd.addRoute(netId, route); 4067 } catch (Exception e) { 4068 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4069 loge("Exception in addRoute for gateway: " + e); 4070 } 4071 } 4072 } 4073 4074 for (RouteInfo route : routeDiff.removed) { 4075 if (DBG) log("Removing Route [" + route + "] from network " + netId); 4076 try { 4077 mNetd.removeRoute(netId, route); 4078 } catch (Exception e) { 4079 loge("Exception in removeRoute: " + e); 4080 } 4081 } 4082 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4083 } 4084 4085 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId, 4086 boolean flush, boolean useDefaultDns) { 4087 if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) { 4088 Collection<InetAddress> dnses = newLp.getDnsServers(); 4089 if (dnses.size() == 0 && mDefaultDns != null && useDefaultDns) { 4090 dnses = new ArrayList(); 4091 dnses.add(mDefaultDns); 4092 if (DBG) { 4093 loge("no dns provided for netId " + netId + ", so using defaults"); 4094 } 4095 } 4096 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 4097 try { 4098 mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses), 4099 newLp.getDomains()); 4100 } catch (Exception e) { 4101 loge("Exception in setDnsServersForNetwork: " + e); 4102 } 4103 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4104 if (defaultNai != null && defaultNai.network.netId == netId) { 4105 setDefaultDnsSystemProperties(dnses); 4106 } 4107 flushVmDnsCache(); 4108 } else if (flush) { 4109 try { 4110 mNetd.flushNetworkDnsCache(netId); 4111 } catch (Exception e) { 4112 loge("Exception in flushNetworkDnsCache: " + e); 4113 } 4114 flushVmDnsCache(); 4115 } 4116 } 4117 4118 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4119 int last = 0; 4120 for (InetAddress dns : dnses) { 4121 ++last; 4122 String key = "net.dns" + last; 4123 String value = dns.getHostAddress(); 4124 SystemProperties.set(key, value); 4125 } 4126 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4127 String key = "net.dns" + i; 4128 SystemProperties.set(key, ""); 4129 } 4130 mNumDnsEntries = last; 4131 } 4132 4133 /** 4134 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4135 * augmented with any stateful capabilities implied from {@code networkAgent} 4136 * (e.g., validated status and captive portal status). 4137 * 4138 * @param nai the network having its capabilities updated. 4139 * @param networkCapabilities the new network capabilities. 4140 */ 4141 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4142 // Don't modify caller's NetworkCapabilities. 4143 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4144 if (nai.lastValidated) { 4145 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4146 } else { 4147 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4148 } 4149 if (nai.lastCaptivePortalDetected) { 4150 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4151 } else { 4152 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4153 } 4154 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4155 final int oldScore = nai.getCurrentScore(); 4156 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4157 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4158 try { 4159 mNetd.setNetworkPermission(nai.network.netId, 4160 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4161 null : NetworkManagementService.PERMISSION_SYSTEM); 4162 } catch (RemoteException e) { 4163 loge("Exception in setNetworkPermission: " + e); 4164 } 4165 } 4166 synchronized (nai) { 4167 nai.networkCapabilities = networkCapabilities; 4168 } 4169 rematchAllNetworksAndRequests(nai, oldScore); 4170 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4171 } 4172 } 4173 4174 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4175 for (int i = 0; i < nai.networkRequests.size(); i++) { 4176 NetworkRequest nr = nai.networkRequests.valueAt(i); 4177 // Don't send listening requests to factories. b/17393458 4178 if (!isRequest(nr)) continue; 4179 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4180 } 4181 } 4182 4183 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4184 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4185 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4186 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4187 networkRequest); 4188 } 4189 } 4190 4191 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4192 int notificationType) { 4193 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4194 Intent intent = new Intent(); 4195 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4196 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4197 nri.mPendingIntentSent = true; 4198 sendIntent(nri.mPendingIntent, intent); 4199 } 4200 // else not handled 4201 } 4202 4203 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4204 mPendingIntentWakeLock.acquire(); 4205 try { 4206 if (DBG) log("Sending " + pendingIntent); 4207 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4208 } catch (PendingIntent.CanceledException e) { 4209 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4210 mPendingIntentWakeLock.release(); 4211 releasePendingNetworkRequest(pendingIntent); 4212 } 4213 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4214 } 4215 4216 @Override 4217 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4218 String resultData, Bundle resultExtras) { 4219 if (DBG) log("Finished sending " + pendingIntent); 4220 mPendingIntentWakeLock.release(); 4221 // Release with a delay so the receiving client has an opportunity to put in its 4222 // own request. 4223 releasePendingNetworkRequestWithDelay(pendingIntent); 4224 } 4225 4226 private void callCallbackForRequest(NetworkRequestInfo nri, 4227 NetworkAgentInfo networkAgent, int notificationType) { 4228 if (nri.messenger == null) return; // Default request has no msgr 4229 Bundle bundle = new Bundle(); 4230 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4231 new NetworkRequest(nri.request)); 4232 Message msg = Message.obtain(); 4233 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4234 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4235 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4236 } 4237 switch (notificationType) { 4238 case ConnectivityManager.CALLBACK_LOSING: { 4239 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4240 break; 4241 } 4242 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4243 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4244 new NetworkCapabilities(networkAgent.networkCapabilities)); 4245 break; 4246 } 4247 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4248 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4249 new LinkProperties(networkAgent.linkProperties)); 4250 break; 4251 } 4252 } 4253 msg.what = notificationType; 4254 msg.setData(bundle); 4255 try { 4256 if (VDBG) { 4257 log("sending notification " + notifyTypeToName(notificationType) + 4258 " for " + nri.request); 4259 } 4260 nri.messenger.send(msg); 4261 } catch (RemoteException e) { 4262 // may occur naturally in the race of binder death. 4263 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4264 } 4265 } 4266 4267 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4268 for (int i = 0; i < nai.networkRequests.size(); i++) { 4269 NetworkRequest nr = nai.networkRequests.valueAt(i); 4270 // Ignore listening requests. 4271 if (!isRequest(nr)) continue; 4272 loge("Dead network still had at least " + nr); 4273 break; 4274 } 4275 nai.asyncChannel.disconnect(); 4276 } 4277 4278 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4279 if (oldNetwork == null) { 4280 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4281 return; 4282 } 4283 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4284 teardownUnneededNetwork(oldNetwork); 4285 } 4286 4287 private void makeDefault(NetworkAgentInfo newNetwork) { 4288 if (DBG) log("Switching to new default network: " + newNetwork); 4289 setupDataActivityTracking(newNetwork); 4290 try { 4291 mNetd.setDefaultNetId(newNetwork.network.netId); 4292 } catch (Exception e) { 4293 loge("Exception setting default network :" + e); 4294 } 4295 notifyLockdownVpn(newNetwork); 4296 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4297 updateTcpBufferSizes(newNetwork); 4298 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4299 } 4300 4301 // Handles a network appearing or improving its score. 4302 // 4303 // - Evaluates all current NetworkRequests that can be 4304 // satisfied by newNetwork, and reassigns to newNetwork 4305 // any such requests for which newNetwork is the best. 4306 // 4307 // - Lingers any validated Networks that as a result are no longer 4308 // needed. A network is needed if it is the best network for 4309 // one or more NetworkRequests, or if it is a VPN. 4310 // 4311 // - Tears down newNetwork if it just became validated 4312 // but turns out to be unneeded. 4313 // 4314 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4315 // networks that have no chance (i.e. even if validated) 4316 // of becoming the highest scoring network. 4317 // 4318 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4319 // it does not remove NetworkRequests that other Networks could better satisfy. 4320 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4321 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4322 // as it performs better by a factor of the number of Networks. 4323 // 4324 // @param newNetwork is the network to be matched against NetworkRequests. 4325 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4326 // performed to tear down unvalidated networks that have no chance (i.e. even if 4327 // validated) of becoming the highest scoring network. 4328 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4329 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4330 if (!newNetwork.created) return; 4331 boolean keep = newNetwork.isVPN(); 4332 boolean isNewDefault = false; 4333 NetworkAgentInfo oldDefaultNetwork = null; 4334 if (VDBG) log("rematching " + newNetwork.name()); 4335 // Find and migrate to this Network any NetworkRequests for 4336 // which this network is now the best. 4337 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4338 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4339 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4340 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4341 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4342 final boolean satisfies = newNetwork.satisfies(nri.request); 4343 if (newNetwork == currentNetwork && satisfies) { 4344 if (VDBG) { 4345 log("Network " + newNetwork.name() + " was already satisfying" + 4346 " request " + nri.request.requestId + ". No change."); 4347 } 4348 keep = true; 4349 continue; 4350 } 4351 4352 // check if it satisfies the NetworkCapabilities 4353 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4354 if (satisfies) { 4355 if (!nri.isRequest) { 4356 // This is not a request, it's a callback listener. 4357 // Add it to newNetwork regardless of score. 4358 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4359 continue; 4360 } 4361 4362 // next check if it's better than any current network we're using for 4363 // this request 4364 if (VDBG) { 4365 log("currentScore = " + 4366 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4367 ", newScore = " + newNetwork.getCurrentScore()); 4368 } 4369 if (currentNetwork == null || 4370 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4371 if (DBG) log("rematch for " + newNetwork.name()); 4372 if (currentNetwork != null) { 4373 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4374 currentNetwork.networkRequests.remove(nri.request.requestId); 4375 currentNetwork.networkLingered.add(nri.request); 4376 affectedNetworks.add(currentNetwork); 4377 } else { 4378 if (DBG) log(" accepting network in place of null"); 4379 } 4380 unlinger(newNetwork); 4381 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4382 if (!newNetwork.addRequest(nri.request)) { 4383 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4384 } 4385 addedRequests.add(nri); 4386 keep = true; 4387 // Tell NetworkFactories about the new score, so they can stop 4388 // trying to connect if they know they cannot match it. 4389 // TODO - this could get expensive if we have alot of requests for this 4390 // network. Think about if there is a way to reduce this. Push 4391 // netid->request mapping to each factory? 4392 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4393 if (mDefaultRequest.requestId == nri.request.requestId) { 4394 isNewDefault = true; 4395 oldDefaultNetwork = currentNetwork; 4396 } 4397 } 4398 } else if (newNetwork.networkRequests.get(nri.request.requestId) != null) { 4399 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4400 // mark it as no longer satisfying "nri". Because networks are processed by 4401 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4402 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4403 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4404 // This means this code doesn't have to handle the case where "currentNetwork" no 4405 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4406 if (DBG) { 4407 log("Network " + newNetwork.name() + " stopped satisfying" + 4408 " request " + nri.request.requestId); 4409 } 4410 newNetwork.networkRequests.remove(nri.request.requestId); 4411 if (currentNetwork == newNetwork) { 4412 mNetworkForRequestId.remove(nri.request.requestId); 4413 sendUpdatedScoreToFactories(nri.request, 0); 4414 } else { 4415 if (nri.isRequest == true) { 4416 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4417 newNetwork.name() + 4418 " without updating mNetworkForRequestId or factories!"); 4419 } 4420 } 4421 // TODO: technically, sending CALLBACK_LOST here is 4422 // incorrect if nri is a request (not a listen) and there 4423 // is a replacement network currently connected that can 4424 // satisfy it. However, the only capability that can both 4425 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4426 // so this code is only incorrect for a network that loses 4427 // the TRUSTED capability, which is a rare case. 4428 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST); 4429 } 4430 } 4431 // Linger any networks that are no longer needed. 4432 for (NetworkAgentInfo nai : affectedNetworks) { 4433 if (nai.lingering) { 4434 // Already lingered. Nothing to do. This can only happen if "nai" is in 4435 // "affectedNetworks" twice. The reasoning being that to get added to 4436 // "affectedNetworks", "nai" must have been satisfying a NetworkRequest 4437 // (i.e. not lingered) so it could have only been lingered by this loop. 4438 // unneeded(nai) will be false and we'll call unlinger() below which would 4439 // be bad, so handle it here. 4440 } else if (unneeded(nai)) { 4441 linger(nai); 4442 } else { 4443 // Clear nai.networkLingered we might have added above. 4444 unlinger(nai); 4445 } 4446 } 4447 if (isNewDefault) { 4448 // Notify system services that this network is up. 4449 makeDefault(newNetwork); 4450 synchronized (ConnectivityService.this) { 4451 // have a new default network, release the transition wakelock in 4452 // a second if it's held. The second pause is to allow apps 4453 // to reconnect over the new network 4454 if (mNetTransitionWakeLock.isHeld()) { 4455 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4456 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4457 mNetTransitionWakeLockSerialNumber, 0), 4458 1000); 4459 } 4460 } 4461 } 4462 4463 // do this after the default net is switched, but 4464 // before LegacyTypeTracker sends legacy broadcasts 4465 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4466 4467 if (isNewDefault) { 4468 // Maintain the illusion: since the legacy API only 4469 // understands one network at a time, we must pretend 4470 // that the current default network disconnected before 4471 // the new one connected. 4472 if (oldDefaultNetwork != null) { 4473 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4474 oldDefaultNetwork, true); 4475 } 4476 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4477 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4478 notifyLockdownVpn(newNetwork); 4479 } 4480 4481 if (keep) { 4482 // Notify battery stats service about this network, both the normal 4483 // interface and any stacked links. 4484 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4485 try { 4486 final IBatteryStats bs = BatteryStatsService.getService(); 4487 final int type = newNetwork.networkInfo.getType(); 4488 4489 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4490 bs.noteNetworkInterfaceType(baseIface, type); 4491 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4492 final String stackedIface = stacked.getInterfaceName(); 4493 bs.noteNetworkInterfaceType(stackedIface, type); 4494 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4495 } 4496 } catch (RemoteException ignored) { 4497 } 4498 4499 // This has to happen after the notifyNetworkCallbacks as that tickles each 4500 // ConnectivityManager instance so that legacy requests correctly bind dns 4501 // requests to this network. The legacy users are listening for this bcast 4502 // and will generally do a dns request so they can ensureRouteToHost and if 4503 // they do that before the callbacks happen they'll use the default network. 4504 // 4505 // TODO: Is there still a race here? We send the broadcast 4506 // after sending the callback, but if the app can receive the 4507 // broadcast before the callback, it might still break. 4508 // 4509 // This *does* introduce a race where if the user uses the new api 4510 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4511 // they may get old info. Reverse this after the old startUsing api is removed. 4512 // This is on top of the multiple intent sequencing referenced in the todo above. 4513 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4514 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4515 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4516 // legacy type tracker filters out repeat adds 4517 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4518 } 4519 } 4520 4521 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4522 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4523 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4524 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4525 if (newNetwork.isVPN()) { 4526 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4527 } 4528 } 4529 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4530 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4531 if (unneeded(nai)) { 4532 if (DBG) log("Reaping " + nai.name()); 4533 teardownUnneededNetwork(nai); 4534 } 4535 } 4536 } 4537 } 4538 4539 /** 4540 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4541 * being disconnected. 4542 * @param changed If only one Network's score or capabilities have been modified since the last 4543 * time this function was called, pass this Network in this argument, otherwise pass 4544 * null. 4545 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4546 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4547 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4548 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4549 * network's score. 4550 */ 4551 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4552 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4553 // to avoid the slowness. It is not simply enough to process just "changed", for 4554 // example in the case where "changed"'s score decreases and another network should begin 4555 // satifying a NetworkRequest that "changed" currently satisfies. 4556 4557 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4558 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4559 // rematchNetworkAndRequests() handles. 4560 if (changed != null && oldScore < changed.getCurrentScore()) { 4561 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP); 4562 } else { 4563 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4564 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4565 // Rematch higher scoring networks first to prevent requests first matching a lower 4566 // scoring network and then a higher scoring network, which could produce multiple 4567 // callbacks and inadvertently unlinger networks. 4568 Arrays.sort(nais); 4569 for (NetworkAgentInfo nai : nais) { 4570 rematchNetworkAndRequests(nai, 4571 // Only reap the last time through the loop. Reaping before all rematching 4572 // is complete could incorrectly teardown a network that hasn't yet been 4573 // rematched. 4574 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4575 : ReapUnvalidatedNetworks.REAP); 4576 } 4577 } 4578 } 4579 4580 private void updateInetCondition(NetworkAgentInfo nai) { 4581 // Don't bother updating until we've graduated to validated at least once. 4582 if (!nai.everValidated) return; 4583 // For now only update icons for default connection. 4584 // TODO: Update WiFi and cellular icons separately. b/17237507 4585 if (!isDefaultNetwork(nai)) return; 4586 4587 int newInetCondition = nai.lastValidated ? 100 : 0; 4588 // Don't repeat publish. 4589 if (newInetCondition == mDefaultInetConditionPublished) return; 4590 4591 mDefaultInetConditionPublished = newInetCondition; 4592 sendInetConditionBroadcast(nai.networkInfo); 4593 } 4594 4595 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4596 if (mLockdownTracker != null) { 4597 if (nai != null && nai.isVPN()) { 4598 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4599 } else { 4600 mLockdownTracker.onNetworkInfoChanged(); 4601 } 4602 } 4603 } 4604 4605 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4606 NetworkInfo.State state = newInfo.getState(); 4607 NetworkInfo oldInfo = null; 4608 final int oldScore = networkAgent.getCurrentScore(); 4609 synchronized (networkAgent) { 4610 oldInfo = networkAgent.networkInfo; 4611 networkAgent.networkInfo = newInfo; 4612 } 4613 notifyLockdownVpn(networkAgent); 4614 4615 if (oldInfo != null && oldInfo.getState() == state) { 4616 if (VDBG) log("ignoring duplicate network state non-change"); 4617 return; 4618 } 4619 if (DBG) { 4620 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4621 (oldInfo == null ? "null" : oldInfo.getState()) + 4622 " to " + state); 4623 } 4624 4625 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4626 try { 4627 // This should never fail. Specifying an already in use NetID will cause failure. 4628 if (networkAgent.isVPN()) { 4629 mNetd.createVirtualNetwork(networkAgent.network.netId, 4630 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4631 (networkAgent.networkMisc == null || 4632 !networkAgent.networkMisc.allowBypass)); 4633 } else { 4634 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4635 networkAgent.networkCapabilities.hasCapability( 4636 NET_CAPABILITY_NOT_RESTRICTED) ? 4637 null : NetworkManagementService.PERMISSION_SYSTEM); 4638 } 4639 } catch (Exception e) { 4640 loge("Error creating network " + networkAgent.network.netId + ": " 4641 + e.getMessage()); 4642 return; 4643 } 4644 networkAgent.created = true; 4645 updateLinkProperties(networkAgent, null); 4646 notifyIfacesChanged(); 4647 4648 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4649 scheduleUnvalidatedPrompt(networkAgent); 4650 4651 if (networkAgent.isVPN()) { 4652 // Temporarily disable the default proxy (not global). 4653 synchronized (mProxyLock) { 4654 if (!mDefaultProxyDisabled) { 4655 mDefaultProxyDisabled = true; 4656 if (mGlobalProxy == null && mDefaultProxy != null) { 4657 sendProxyBroadcast(null); 4658 } 4659 } 4660 } 4661 // TODO: support proxy per network. 4662 } 4663 4664 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 4665 // be communicated to a particular NetworkAgent depends only on the network's immutable, 4666 // capabilities, so it only needs to be done once on initial connect, not every time the 4667 // network's capabilities change. Note that we do this before rematching the network, 4668 // so we could decide to tear it down immediately afterwards. That's fine though - on 4669 // disconnection NetworkAgents should stop any signal strength monitoring they have been 4670 // doing. 4671 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 4672 4673 // Consider network even though it is not yet validated. 4674 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP); 4675 4676 // This has to happen after matching the requests, because callbacks are just requests. 4677 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4678 } else if (state == NetworkInfo.State.DISCONNECTED) { 4679 networkAgent.asyncChannel.disconnect(); 4680 if (networkAgent.isVPN()) { 4681 synchronized (mProxyLock) { 4682 if (mDefaultProxyDisabled) { 4683 mDefaultProxyDisabled = false; 4684 if (mGlobalProxy == null && mDefaultProxy != null) { 4685 sendProxyBroadcast(mDefaultProxy); 4686 } 4687 } 4688 } 4689 } 4690 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 4691 state == NetworkInfo.State.SUSPENDED) { 4692 // going into or coming out of SUSPEND: rescore and notify 4693 if (networkAgent.getCurrentScore() != oldScore) { 4694 rematchAllNetworksAndRequests(networkAgent, oldScore); 4695 } 4696 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 4697 ConnectivityManager.CALLBACK_SUSPENDED : 4698 ConnectivityManager.CALLBACK_RESUMED)); 4699 mLegacyTypeTracker.update(networkAgent); 4700 } 4701 } 4702 4703 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4704 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4705 if (score < 0) { 4706 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4707 "). Bumping score to min of 0"); 4708 score = 0; 4709 } 4710 4711 final int oldScore = nai.getCurrentScore(); 4712 nai.setCurrentScore(score); 4713 4714 rematchAllNetworksAndRequests(nai, oldScore); 4715 4716 sendUpdatedScoreToFactories(nai); 4717 } 4718 4719 // notify only this one new request of the current state 4720 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4721 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4722 // TODO - read state from monitor to decide what to send. 4723// if (nai.networkMonitor.isLingering()) { 4724// notifyType = NetworkCallbacks.LOSING; 4725// } else if (nai.networkMonitor.isEvaluating()) { 4726// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4727// } 4728 if (nri.mPendingIntent == null) { 4729 callCallbackForRequest(nri, nai, notifyType); 4730 } else { 4731 sendPendingIntentForRequest(nri, nai, notifyType); 4732 } 4733 } 4734 4735 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 4736 // The NetworkInfo we actually send out has no bearing on the real 4737 // state of affairs. For example, if the default connection is mobile, 4738 // and a request for HIPRI has just gone away, we need to pretend that 4739 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4740 // the state to DISCONNECTED, even though the network is of type MOBILE 4741 // and is still connected. 4742 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4743 info.setType(type); 4744 if (state != DetailedState.DISCONNECTED) { 4745 info.setDetailedState(state, null, info.getExtraInfo()); 4746 sendConnectedBroadcast(info); 4747 } else { 4748 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 4749 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4750 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4751 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4752 if (info.isFailover()) { 4753 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4754 nai.networkInfo.setFailover(false); 4755 } 4756 if (info.getReason() != null) { 4757 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4758 } 4759 if (info.getExtraInfo() != null) { 4760 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4761 } 4762 NetworkAgentInfo newDefaultAgent = null; 4763 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4764 newDefaultAgent = getDefaultNetwork(); 4765 if (newDefaultAgent != null) { 4766 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4767 newDefaultAgent.networkInfo); 4768 } else { 4769 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4770 } 4771 } 4772 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4773 mDefaultInetConditionPublished); 4774 sendStickyBroadcast(intent); 4775 if (newDefaultAgent != null) { 4776 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4777 } 4778 } 4779 } 4780 4781 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4782 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4783 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4784 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4785 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4786 if (VDBG) log(" sending notification for " + nr); 4787 if (nri.mPendingIntent == null) { 4788 callCallbackForRequest(nri, networkAgent, notifyType); 4789 } else { 4790 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4791 } 4792 } 4793 } 4794 4795 private String notifyTypeToName(int notifyType) { 4796 switch (notifyType) { 4797 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4798 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4799 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4800 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4801 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4802 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4803 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4804 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4805 } 4806 return "UNKNOWN"; 4807 } 4808 4809 /** 4810 * Notify other system services that set of active ifaces has changed. 4811 */ 4812 private void notifyIfacesChanged() { 4813 try { 4814 mStatsService.forceUpdateIfaces(); 4815 } catch (Exception ignored) { 4816 } 4817 } 4818 4819 @Override 4820 public boolean addVpnAddress(String address, int prefixLength) { 4821 throwIfLockdownEnabled(); 4822 int user = UserHandle.getUserId(Binder.getCallingUid()); 4823 synchronized (mVpns) { 4824 return mVpns.get(user).addAddress(address, prefixLength); 4825 } 4826 } 4827 4828 @Override 4829 public boolean removeVpnAddress(String address, int prefixLength) { 4830 throwIfLockdownEnabled(); 4831 int user = UserHandle.getUserId(Binder.getCallingUid()); 4832 synchronized (mVpns) { 4833 return mVpns.get(user).removeAddress(address, prefixLength); 4834 } 4835 } 4836 4837 @Override 4838 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 4839 throwIfLockdownEnabled(); 4840 int user = UserHandle.getUserId(Binder.getCallingUid()); 4841 boolean success; 4842 synchronized (mVpns) { 4843 success = mVpns.get(user).setUnderlyingNetworks(networks); 4844 } 4845 if (success) { 4846 notifyIfacesChanged(); 4847 } 4848 return success; 4849 } 4850 4851 @Override 4852 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 4853 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 4854 enforceKeepalivePermission(); 4855 mKeepaliveTracker.startNattKeepalive( 4856 getNetworkAgentInfoForNetwork(network), 4857 intervalSeconds, messenger, binder, 4858 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 4859 } 4860 4861 @Override 4862 public void stopKeepalive(Network network, int slot) { 4863 mHandler.sendMessage(mHandler.obtainMessage( 4864 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 4865 } 4866 4867 @Override 4868 public void factoryReset() { 4869 enforceConnectivityInternalPermission(); 4870 4871 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 4872 return; 4873 } 4874 4875 final int userId = UserHandle.getCallingUserId(); 4876 4877 // Turn airplane mode off 4878 setAirplaneMode(false); 4879 4880 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 4881 // Untether 4882 for (String tether : getTetheredIfaces()) { 4883 untether(tether); 4884 } 4885 } 4886 4887 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 4888 // Turn VPN off 4889 VpnConfig vpnConfig = getVpnConfig(userId); 4890 if (vpnConfig != null) { 4891 if (vpnConfig.legacy) { 4892 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 4893 } else { 4894 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 4895 // in the future without user intervention. 4896 setVpnPackageAuthorization(vpnConfig.user, userId, false); 4897 4898 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN, userId); 4899 } 4900 } 4901 } 4902 } 4903 4904 @VisibleForTesting 4905 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 4906 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 4907 return new NetworkMonitor(context, handler, nai, defaultRequest); 4908 } 4909 4910} 4911