ConnectivityService.java revision 578a76e7de77492ac33e407fff4fb9a2f5550d8a
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.ApfFilter; 129import com.android.server.connectivity.Tethering; 130import com.android.server.connectivity.Vpn; 131import com.android.server.net.BaseNetworkObserver; 132import com.android.server.net.LockdownVpnTracker; 133import com.google.android.collect.Lists; 134import com.google.android.collect.Sets; 135 136import org.xmlpull.v1.XmlPullParser; 137import org.xmlpull.v1.XmlPullParserException; 138 139import java.io.File; 140import java.io.FileDescriptor; 141import java.io.FileNotFoundException; 142import java.io.FileReader; 143import java.io.IOException; 144import java.io.PrintWriter; 145import java.net.Inet4Address; 146import java.net.InetAddress; 147import java.net.UnknownHostException; 148import java.util.ArrayDeque; 149import java.util.ArrayList; 150import java.util.Arrays; 151import java.util.Collection; 152import java.util.HashMap; 153import java.util.HashSet; 154import java.util.SortedSet; 155import java.util.TreeSet; 156import java.util.Iterator; 157import java.util.List; 158import java.util.Map; 159import java.util.Objects; 160import java.util.concurrent.atomic.AtomicInteger; 161 162/** 163 * @hide 164 */ 165public class ConnectivityService extends IConnectivityManager.Stub 166 implements PendingIntent.OnFinished { 167 private static final String TAG = "ConnectivityService"; 168 169 private static final boolean DBG = true; 170 private static final boolean VDBG = false; 171 172 private static final boolean LOGD_RULES = false; 173 174 // TODO: create better separation between radio types and network types 175 176 // how long to wait before switching back to a radio's default network 177 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 178 // system property that can override the above value 179 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 180 "android.telephony.apn-restore"; 181 182 // How long to wait before putting up a "This network doesn't have an Internet connection, 183 // connect anyway?" dialog after the user selects a network that doesn't validate. 184 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 185 186 // How long to delay to removal of a pending intent based request. 187 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 188 private final int mReleasePendingIntentDelayMs; 189 190 private Tethering mTethering; 191 192 private final PermissionMonitor mPermissionMonitor; 193 194 private KeyStore mKeyStore; 195 196 @GuardedBy("mVpns") 197 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 198 199 private boolean mLockdownEnabled; 200 private LockdownVpnTracker mLockdownTracker; 201 202 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 203 private Object mRulesLock = new Object(); 204 /** Currently active network rules by UID. */ 205 private SparseIntArray mUidRules = new SparseIntArray(); 206 /** Set of ifaces that are costly. */ 207 private HashSet<String> mMeteredIfaces = Sets.newHashSet(); 208 209 final private Context mContext; 210 private int mNetworkPreference; 211 // 0 is full bad, 100 is full good 212 private int mDefaultInetConditionPublished = 0; 213 214 private int mNumDnsEntries; 215 216 private boolean mTestMode; 217 private static ConnectivityService sServiceInstance; 218 219 private INetworkManagementService mNetd; 220 private INetworkStatsService mStatsService; 221 private INetworkPolicyManager mPolicyManager; 222 223 private String mCurrentTcpBufferSizes; 224 225 private static final int ENABLED = 1; 226 private static final int DISABLED = 0; 227 228 private enum ReapUnvalidatedNetworks { 229 // Tear down networks that have no chance (e.g. even if validated) of becoming 230 // the highest scoring network satisfying a NetworkRequest. This should be passed when 231 // all networks have been rematched against all NetworkRequests. 232 REAP, 233 // Don't reap networks. This should be passed when some networks have not yet been 234 // rematched against all NetworkRequests. 235 DONT_REAP 236 }; 237 238 /** 239 * used internally to change our mobile data enabled flag 240 */ 241 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 242 243 /** 244 * used internally to clear a wakelock when transitioning 245 * from one net to another. Clear happens when we get a new 246 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 247 * after a timeout if no network is found (typically 1 min). 248 */ 249 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 250 251 /** 252 * used internally to reload global proxy settings 253 */ 254 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 255 256 /** 257 * used internally to send a sticky broadcast delayed. 258 */ 259 private static final int EVENT_SEND_STICKY_BROADCAST_INTENT = 11; 260 261 /** 262 * PAC manager has received new port. 263 */ 264 private static final int EVENT_PROXY_HAS_CHANGED = 16; 265 266 /** 267 * used internally when registering NetworkFactories 268 * obj = NetworkFactoryInfo 269 */ 270 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 271 272 /** 273 * used internally when registering NetworkAgents 274 * obj = Messenger 275 */ 276 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 277 278 /** 279 * used to add a network request 280 * includes a NetworkRequestInfo 281 */ 282 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 283 284 /** 285 * indicates a timeout period is over - check if we had a network yet or not 286 * and if not, call the timeout calback (but leave the request live until they 287 * cancel it. 288 * includes a NetworkRequestInfo 289 */ 290 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 291 292 /** 293 * used to add a network listener - no request 294 * includes a NetworkRequestInfo 295 */ 296 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 297 298 /** 299 * used to remove a network request, either a listener or a real request 300 * arg1 = UID of caller 301 * obj = NetworkRequest 302 */ 303 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 304 305 /** 306 * used internally when registering NetworkFactories 307 * obj = Messenger 308 */ 309 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 310 311 /** 312 * used internally to expire a wakelock when transitioning 313 * from one net to another. Expire happens when we fail to find 314 * a new network (typically after 1 minute) - 315 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 316 * a replacement network. 317 */ 318 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 319 320 /** 321 * Used internally to indicate the system is ready. 322 */ 323 private static final int EVENT_SYSTEM_READY = 25; 324 325 /** 326 * used to add a network request with a pending intent 327 * obj = NetworkRequestInfo 328 */ 329 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 330 331 /** 332 * used to remove a pending intent and its associated network request. 333 * arg1 = UID of caller 334 * obj = PendingIntent 335 */ 336 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 337 338 /** 339 * used to specify whether a network should be used even if unvalidated. 340 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 341 * arg2 = whether to remember this choice in the future (1 or 0) 342 * obj = network 343 */ 344 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 345 346 /** 347 * used to ask the user to confirm a connection to an unvalidated network. 348 * obj = network 349 */ 350 private static final int EVENT_PROMPT_UNVALIDATED = 29; 351 352 /** 353 * used internally to (re)configure mobile data always-on settings. 354 */ 355 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 356 357 /** 358 * used to add a network listener with a pending intent 359 * obj = NetworkRequestInfo 360 */ 361 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 362 363 /** 364 * used to push APF program to NetworkAgent 365 * replyTo = NetworkAgent message handler 366 * obj = byte[] of APF program 367 */ 368 private static final int EVENT_PUSH_APF_PROGRAM_TO_NETWORK = 32; 369 370 /** Handler thread used for both of the handlers below. */ 371 @VisibleForTesting 372 protected final HandlerThread mHandlerThread; 373 /** Handler used for internal events. */ 374 final private InternalHandler mHandler; 375 /** Handler used for incoming {@link NetworkStateTracker} events. */ 376 final private NetworkStateTrackerHandler mTrackerHandler; 377 378 private boolean mSystemReady; 379 private Intent mInitialBroadcast; 380 381 private PowerManager.WakeLock mNetTransitionWakeLock; 382 private String mNetTransitionWakeLockCausedBy = ""; 383 private int mNetTransitionWakeLockSerialNumber; 384 private int mNetTransitionWakeLockTimeout; 385 private final PowerManager.WakeLock mPendingIntentWakeLock; 386 387 private InetAddress mDefaultDns; 388 389 // used in DBG mode to track inet condition reports 390 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 391 private ArrayList mInetLog; 392 393 // track the current default http proxy - tell the world if we get a new one (real change) 394 private volatile ProxyInfo mDefaultProxy = null; 395 private Object mProxyLock = new Object(); 396 private boolean mDefaultProxyDisabled = false; 397 398 // track the global proxy. 399 private ProxyInfo mGlobalProxy = null; 400 401 private PacManager mPacManager = null; 402 403 final private SettingsObserver mSettingsObserver; 404 405 private UserManager mUserManager; 406 407 NetworkConfig[] mNetConfigs; 408 int mNetworksDefined; 409 410 // the set of network types that can only be enabled by system/sig apps 411 List mProtectedNetworks; 412 413 private DataConnectionStats mDataConnectionStats; 414 415 TelephonyManager mTelephonyManager; 416 417 private KeepaliveTracker mKeepaliveTracker; 418 419 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 420 private final static int MIN_NET_ID = 100; // some reserved marks 421 private final static int MAX_NET_ID = 65535; 422 private int mNextNetId = MIN_NET_ID; 423 424 // sequence number of NetworkRequests 425 private int mNextNetworkRequestId = 1; 426 427 // NetworkRequest activity String log entries. 428 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 429 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 430 431 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 432 private static final int MAX_VALIDATION_LOGS = 10; 433 private final ArrayDeque<Pair<Network,ReadOnlyLocalLog>> mValidationLogs = 434 new ArrayDeque<Pair<Network,ReadOnlyLocalLog>>(MAX_VALIDATION_LOGS); 435 436 private void addValidationLogs(ReadOnlyLocalLog log, Network network) { 437 synchronized(mValidationLogs) { 438 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 439 mValidationLogs.removeLast(); 440 } 441 mValidationLogs.addFirst(new Pair(network, log)); 442 } 443 } 444 445 /** 446 * Implements support for the legacy "one network per network type" model. 447 * 448 * We used to have a static array of NetworkStateTrackers, one for each 449 * network type, but that doesn't work any more now that we can have, 450 * for example, more that one wifi network. This class stores all the 451 * NetworkAgentInfo objects that support a given type, but the legacy 452 * API will only see the first one. 453 * 454 * It serves two main purposes: 455 * 456 * 1. Provide information about "the network for a given type" (since this 457 * API only supports one). 458 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 459 * the first network for a given type changes, or if the default network 460 * changes. 461 */ 462 private class LegacyTypeTracker { 463 464 private static final boolean DBG = true; 465 private static final boolean VDBG = false; 466 private static final String TAG = "CSLegacyTypeTracker"; 467 468 /** 469 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 470 * Each list holds references to all NetworkAgentInfos that are used to 471 * satisfy requests for that network type. 472 * 473 * This array is built out at startup such that an unsupported network 474 * doesn't get an ArrayList instance, making this a tristate: 475 * unsupported, supported but not active and active. 476 * 477 * The actual lists are populated when we scan the network types that 478 * are supported on this device. 479 */ 480 private ArrayList<NetworkAgentInfo> mTypeLists[]; 481 482 public LegacyTypeTracker() { 483 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 484 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 485 } 486 487 public void addSupportedType(int type) { 488 if (mTypeLists[type] != null) { 489 throw new IllegalStateException( 490 "legacy list for type " + type + "already initialized"); 491 } 492 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 493 } 494 495 public boolean isTypeSupported(int type) { 496 return isNetworkTypeValid(type) && mTypeLists[type] != null; 497 } 498 499 public NetworkAgentInfo getNetworkForType(int type) { 500 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 501 return mTypeLists[type].get(0); 502 } else { 503 return null; 504 } 505 } 506 507 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 508 boolean isDefaultNetwork) { 509 if (DBG) { 510 log("Sending " + state + 511 " broadcast for type " + type + " " + nai.name() + 512 " isDefaultNetwork=" + isDefaultNetwork); 513 } 514 } 515 516 /** Adds the given network to the specified legacy type list. */ 517 public void add(int type, NetworkAgentInfo nai) { 518 if (!isTypeSupported(type)) { 519 return; // Invalid network type. 520 } 521 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 522 523 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 524 if (list.contains(nai)) { 525 return; 526 } 527 528 list.add(nai); 529 530 // Send a broadcast if this is the first network of its type or if it's the default. 531 final boolean isDefaultNetwork = isDefaultNetwork(nai); 532 if (list.size() == 1 || isDefaultNetwork) { 533 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 534 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 535 } 536 } 537 538 /** Removes the given network from the specified legacy type list. */ 539 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 540 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 541 if (list == null || list.isEmpty()) { 542 return; 543 } 544 545 final boolean wasFirstNetwork = list.get(0).equals(nai); 546 547 if (!list.remove(nai)) { 548 return; 549 } 550 551 final DetailedState state = DetailedState.DISCONNECTED; 552 553 if (wasFirstNetwork || wasDefault) { 554 maybeLogBroadcast(nai, state, type, wasDefault); 555 sendLegacyNetworkBroadcast(nai, state, type); 556 } 557 558 if (!list.isEmpty() && wasFirstNetwork) { 559 if (DBG) log("Other network available for type " + type + 560 ", sending connected broadcast"); 561 final NetworkAgentInfo replacement = list.get(0); 562 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 563 sendLegacyNetworkBroadcast(replacement, state, type); 564 } 565 } 566 567 /** Removes the given network from all legacy type lists. */ 568 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 569 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 570 for (int type = 0; type < mTypeLists.length; type++) { 571 remove(type, nai, wasDefault); 572 } 573 } 574 575 // send out another legacy broadcast - currently only used for suspend/unsuspend 576 // toggle 577 public void update(NetworkAgentInfo nai) { 578 final boolean isDefault = isDefaultNetwork(nai); 579 final DetailedState state = nai.networkInfo.getDetailedState(); 580 for (int type = 0; type < mTypeLists.length; type++) { 581 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 582 final boolean contains = (list != null && list.contains(nai)); 583 final boolean isFirst = (list != null && list.size() > 0 && nai == list.get(0)); 584 if (isFirst || (contains && isDefault)) { 585 maybeLogBroadcast(nai, state, type, isDefault); 586 sendLegacyNetworkBroadcast(nai, state, type); 587 } 588 } 589 } 590 591 private String naiToString(NetworkAgentInfo nai) { 592 String name = (nai != null) ? nai.name() : "null"; 593 String state = (nai.networkInfo != null) ? 594 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 595 "???/???"; 596 return name + " " + state; 597 } 598 599 public void dump(IndentingPrintWriter pw) { 600 pw.println("mLegacyTypeTracker:"); 601 pw.increaseIndent(); 602 pw.print("Supported types:"); 603 for (int type = 0; type < mTypeLists.length; type++) { 604 if (mTypeLists[type] != null) pw.print(" " + type); 605 } 606 pw.println(); 607 pw.println("Current state:"); 608 pw.increaseIndent(); 609 for (int type = 0; type < mTypeLists.length; type++) { 610 if (mTypeLists[type] == null|| mTypeLists[type].size() == 0) continue; 611 for (NetworkAgentInfo nai : mTypeLists[type]) { 612 pw.println(type + " " + naiToString(nai)); 613 } 614 } 615 pw.decreaseIndent(); 616 pw.decreaseIndent(); 617 pw.println(); 618 } 619 620 // This class needs its own log method because it has a different TAG. 621 private void log(String s) { 622 Slog.d(TAG, s); 623 } 624 625 } 626 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 627 628 @VisibleForTesting 629 protected HandlerThread createHandlerThread() { 630 return new HandlerThread("ConnectivityServiceThread"); 631 } 632 633 public ConnectivityService(Context context, INetworkManagementService netManager, 634 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 635 if (DBG) log("ConnectivityService starting up"); 636 637 mDefaultRequest = createInternetRequestForTransport(-1); 638 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, 639 new Binder(), NetworkRequestInfo.REQUEST); 640 mNetworkRequests.put(mDefaultRequest, defaultNRI); 641 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 642 643 mDefaultMobileDataRequest = createInternetRequestForTransport( 644 NetworkCapabilities.TRANSPORT_CELLULAR); 645 646 mHandlerThread = createHandlerThread(); 647 mHandlerThread.start(); 648 mHandler = new InternalHandler(mHandlerThread.getLooper()); 649 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 650 651 // setup our unique device name 652 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 653 String id = Settings.Secure.getString(context.getContentResolver(), 654 Settings.Secure.ANDROID_ID); 655 if (id != null && id.length() > 0) { 656 String name = new String("android-").concat(id); 657 SystemProperties.set("net.hostname", name); 658 } 659 } 660 661 // read our default dns server ip 662 String dns = Settings.Global.getString(context.getContentResolver(), 663 Settings.Global.DEFAULT_DNS_SERVER); 664 if (dns == null || dns.length() == 0) { 665 dns = context.getResources().getString( 666 com.android.internal.R.string.config_default_dns_server); 667 } 668 try { 669 mDefaultDns = NetworkUtils.numericToInetAddress(dns); 670 } catch (IllegalArgumentException e) { 671 loge("Error setting defaultDns using " + dns); 672 } 673 674 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 675 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 676 677 mContext = checkNotNull(context, "missing Context"); 678 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 679 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 680 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 681 mKeyStore = KeyStore.getInstance(); 682 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 683 684 try { 685 mPolicyManager.registerListener(mPolicyListener); 686 } catch (RemoteException e) { 687 // ouch, no rules updates means some processes may never get network 688 loge("unable to register INetworkPolicyListener" + e.toString()); 689 } 690 691 final PowerManager powerManager = (PowerManager) context.getSystemService( 692 Context.POWER_SERVICE); 693 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 694 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 695 com.android.internal.R.integer.config_networkTransitionTimeout); 696 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 697 698 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 699 700 // TODO: What is the "correct" way to do determine if this is a wifi only device? 701 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 702 log("wifiOnly=" + wifiOnly); 703 String[] naStrings = context.getResources().getStringArray( 704 com.android.internal.R.array.networkAttributes); 705 for (String naString : naStrings) { 706 try { 707 NetworkConfig n = new NetworkConfig(naString); 708 if (VDBG) log("naString=" + naString + " config=" + n); 709 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 710 loge("Error in networkAttributes - ignoring attempt to define type " + 711 n.type); 712 continue; 713 } 714 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 715 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 716 n.type); 717 continue; 718 } 719 if (mNetConfigs[n.type] != null) { 720 loge("Error in networkAttributes - ignoring attempt to redefine type " + 721 n.type); 722 continue; 723 } 724 mLegacyTypeTracker.addSupportedType(n.type); 725 726 mNetConfigs[n.type] = n; 727 mNetworksDefined++; 728 } catch(Exception e) { 729 // ignore it - leave the entry null 730 } 731 } 732 733 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 734 if (mNetConfigs[TYPE_VPN] == null) { 735 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 736 // don't need to add TYPE_VPN to mNetConfigs. 737 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 738 mNetworksDefined++; // used only in the log() statement below. 739 } 740 741 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 742 743 mProtectedNetworks = new ArrayList<Integer>(); 744 int[] protectedNetworks = context.getResources().getIntArray( 745 com.android.internal.R.array.config_protectedNetworks); 746 for (int p : protectedNetworks) { 747 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 748 mProtectedNetworks.add(p); 749 } else { 750 if (DBG) loge("Ignoring protectedNetwork " + p); 751 } 752 } 753 754 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 755 && SystemProperties.get("ro.build.type").equals("eng"); 756 757 mTethering = new Tethering(mContext, mNetd, statsService, mHandler.getLooper()); 758 759 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 760 761 //set up the listener for user state for creating user VPNs 762 IntentFilter intentFilter = new IntentFilter(); 763 intentFilter.addAction(Intent.ACTION_USER_STARTING); 764 intentFilter.addAction(Intent.ACTION_USER_STOPPING); 765 mContext.registerReceiverAsUser( 766 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 767 768 try { 769 mNetd.registerObserver(mTethering); 770 mNetd.registerObserver(mDataActivityObserver); 771 } catch (RemoteException e) { 772 loge("Error registering observer :" + e); 773 } 774 775 if (DBG) { 776 mInetLog = new ArrayList(); 777 } 778 779 mSettingsObserver = new SettingsObserver(mContext, mHandler); 780 registerSettingsCallbacks(); 781 782 mDataConnectionStats = new DataConnectionStats(mContext); 783 mDataConnectionStats.startMonitoring(); 784 785 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 786 787 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 788 789 mKeepaliveTracker = new KeepaliveTracker(mHandler); 790 } 791 792 private NetworkRequest createInternetRequestForTransport(int transportType) { 793 NetworkCapabilities netCap = new NetworkCapabilities(); 794 netCap.addCapability(NET_CAPABILITY_INTERNET); 795 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 796 if (transportType > -1) { 797 netCap.addTransportType(transportType); 798 } 799 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 800 } 801 802 private void handleMobileDataAlwaysOn() { 803 final boolean enable = (Settings.Global.getInt( 804 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 805 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 806 if (enable == isEnabled) { 807 return; // Nothing to do. 808 } 809 810 if (enable) { 811 handleRegisterNetworkRequest(new NetworkRequestInfo( 812 null, mDefaultMobileDataRequest, new Binder(), NetworkRequestInfo.REQUEST)); 813 } else { 814 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 815 } 816 } 817 818 private void registerSettingsCallbacks() { 819 // Watch for global HTTP proxy changes. 820 mSettingsObserver.observe( 821 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 822 EVENT_APPLY_GLOBAL_HTTP_PROXY); 823 824 // Watch for whether or not to keep mobile data always on. 825 mSettingsObserver.observe( 826 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 827 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 828 } 829 830 private synchronized int nextNetworkRequestId() { 831 return mNextNetworkRequestId++; 832 } 833 834 @VisibleForTesting 835 protected int reserveNetId() { 836 synchronized (mNetworkForNetId) { 837 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 838 int netId = mNextNetId; 839 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 840 // Make sure NetID unused. http://b/16815182 841 if (!mNetIdInUse.get(netId)) { 842 mNetIdInUse.put(netId, true); 843 return netId; 844 } 845 } 846 } 847 throw new IllegalStateException("No free netIds"); 848 } 849 850 private NetworkState getFilteredNetworkState(int networkType, int uid) { 851 NetworkInfo info = null; 852 LinkProperties lp = null; 853 NetworkCapabilities nc = null; 854 Network network = null; 855 String subscriberId = null; 856 857 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 858 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 859 if (nai != null) { 860 synchronized (nai) { 861 info = new NetworkInfo(nai.networkInfo); 862 lp = new LinkProperties(nai.linkProperties); 863 nc = new NetworkCapabilities(nai.networkCapabilities); 864 // Network objects are outwardly immutable so there is no point to duplicating. 865 // Duplicating also precludes sharing socket factories and connection pools. 866 network = nai.network; 867 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 868 } 869 info.setType(networkType); 870 } else { 871 info = new NetworkInfo(networkType, 0, getNetworkTypeName(networkType), ""); 872 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 873 info.setIsAvailable(true); 874 lp = new LinkProperties(); 875 nc = new NetworkCapabilities(); 876 network = null; 877 } 878 info = getFilteredNetworkInfo(info, lp, uid); 879 } 880 881 return new NetworkState(info, lp, nc, network, subscriberId, null); 882 } 883 884 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 885 if (network == null) { 886 return null; 887 } 888 synchronized (mNetworkForNetId) { 889 return mNetworkForNetId.get(network.netId); 890 } 891 }; 892 893 private Network[] getVpnUnderlyingNetworks(int uid) { 894 if (!mLockdownEnabled) { 895 int user = UserHandle.getUserId(uid); 896 synchronized (mVpns) { 897 Vpn vpn = mVpns.get(user); 898 if (vpn != null && vpn.appliesToUid(uid)) { 899 return vpn.getUnderlyingNetworks(); 900 } 901 } 902 } 903 return null; 904 } 905 906 private NetworkState getUnfilteredActiveNetworkState(int uid) { 907 NetworkInfo info = null; 908 LinkProperties lp = null; 909 NetworkCapabilities nc = null; 910 Network network = null; 911 String subscriberId = null; 912 913 NetworkAgentInfo nai = getDefaultNetwork(); 914 915 final Network[] networks = getVpnUnderlyingNetworks(uid); 916 if (networks != null) { 917 // getUnderlyingNetworks() returns: 918 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 919 // empty array => the VPN explicitly said "no default network". 920 // non-empty array => the VPN specified one or more default networks; we use the 921 // first one. 922 if (networks.length > 0) { 923 nai = getNetworkAgentInfoForNetwork(networks[0]); 924 } else { 925 nai = null; 926 } 927 } 928 929 if (nai != null) { 930 synchronized (nai) { 931 info = new NetworkInfo(nai.networkInfo); 932 lp = new LinkProperties(nai.linkProperties); 933 nc = new NetworkCapabilities(nai.networkCapabilities); 934 // Network objects are outwardly immutable so there is no point to duplicating. 935 // Duplicating also precludes sharing socket factories and connection pools. 936 network = nai.network; 937 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 938 } 939 } 940 941 return new NetworkState(info, lp, nc, network, subscriberId, null); 942 } 943 944 /** 945 * Check if UID should be blocked from using the network with the given LinkProperties. 946 */ 947 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 948 final boolean networkCostly; 949 final int uidRules; 950 951 final String iface = (lp == null ? "" : lp.getInterfaceName()); 952 synchronized (mRulesLock) { 953 networkCostly = mMeteredIfaces.contains(iface); 954 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 955 } 956 957 if (uidRules == RULE_REJECT_ALL) { 958 return true; 959 } else if ((uidRules == RULE_REJECT_METERED) && networkCostly) { 960 return true; 961 } else { 962 return false; 963 } 964 } 965 966 /** 967 * Return a filtered {@link NetworkInfo}, potentially marked 968 * {@link DetailedState#BLOCKED} based on 969 * {@link #isNetworkWithLinkPropertiesBlocked}. 970 */ 971 private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, LinkProperties lp, int uid) { 972 if (info != null && isNetworkWithLinkPropertiesBlocked(lp, uid)) { 973 // network is blocked; clone and override state 974 info = new NetworkInfo(info); 975 info.setDetailedState(DetailedState.BLOCKED, null, null); 976 if (VDBG) { 977 log("returning Blocked NetworkInfo for ifname=" + 978 lp.getInterfaceName() + ", uid=" + uid); 979 } 980 } 981 if (info != null && mLockdownTracker != null) { 982 info = mLockdownTracker.augmentNetworkInfo(info); 983 if (VDBG) log("returning Locked NetworkInfo"); 984 } 985 return info; 986 } 987 988 /** 989 * Return NetworkInfo for the active (i.e., connected) network interface. 990 * It is assumed that at most one network is active at a time. If more 991 * than one is active, it is indeterminate which will be returned. 992 * @return the info for the active network, or {@code null} if none is 993 * active 994 */ 995 @Override 996 public NetworkInfo getActiveNetworkInfo() { 997 enforceAccessPermission(); 998 final int uid = Binder.getCallingUid(); 999 NetworkState state = getUnfilteredActiveNetworkState(uid); 1000 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1001 } 1002 1003 @Override 1004 public Network getActiveNetwork() { 1005 enforceAccessPermission(); 1006 final int uid = Binder.getCallingUid(); 1007 final int user = UserHandle.getUserId(uid); 1008 int vpnNetId = NETID_UNSET; 1009 synchronized (mVpns) { 1010 final Vpn vpn = mVpns.get(user); 1011 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1012 } 1013 NetworkAgentInfo nai; 1014 if (vpnNetId != NETID_UNSET) { 1015 synchronized (mNetworkForNetId) { 1016 nai = mNetworkForNetId.get(vpnNetId); 1017 } 1018 if (nai != null) return nai.network; 1019 } 1020 nai = getDefaultNetwork(); 1021 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 1022 return nai != null ? nai.network : null; 1023 } 1024 1025 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1026 enforceAccessPermission(); 1027 final int uid = Binder.getCallingUid(); 1028 NetworkState state = getUnfilteredActiveNetworkState(uid); 1029 return state.networkInfo; 1030 } 1031 1032 @Override 1033 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 1034 enforceConnectivityInternalPermission(); 1035 NetworkState state = getUnfilteredActiveNetworkState(uid); 1036 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1037 } 1038 1039 @Override 1040 public NetworkInfo getNetworkInfo(int networkType) { 1041 enforceAccessPermission(); 1042 final int uid = Binder.getCallingUid(); 1043 if (getVpnUnderlyingNetworks(uid) != null) { 1044 // A VPN is active, so we may need to return one of its underlying networks. This 1045 // information is not available in LegacyTypeTracker, so we have to get it from 1046 // getUnfilteredActiveNetworkState. 1047 NetworkState state = getUnfilteredActiveNetworkState(uid); 1048 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1049 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1050 } 1051 } 1052 NetworkState state = getFilteredNetworkState(networkType, uid); 1053 return state.networkInfo; 1054 } 1055 1056 @Override 1057 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1058 enforceAccessPermission(); 1059 final int uid = Binder.getCallingUid(); 1060 NetworkInfo info = null; 1061 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1062 if (nai != null) { 1063 synchronized (nai) { 1064 info = new NetworkInfo(nai.networkInfo); 1065 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1066 } 1067 } 1068 return info; 1069 } 1070 1071 @Override 1072 public NetworkInfo[] getAllNetworkInfo() { 1073 enforceAccessPermission(); 1074 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1075 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1076 networkType++) { 1077 NetworkInfo info = getNetworkInfo(networkType); 1078 if (info != null) { 1079 result.add(info); 1080 } 1081 } 1082 return result.toArray(new NetworkInfo[result.size()]); 1083 } 1084 1085 @Override 1086 public Network getNetworkForType(int networkType) { 1087 enforceAccessPermission(); 1088 final int uid = Binder.getCallingUid(); 1089 NetworkState state = getFilteredNetworkState(networkType, uid); 1090 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1091 return state.network; 1092 } 1093 return null; 1094 } 1095 1096 @Override 1097 public Network[] getAllNetworks() { 1098 enforceAccessPermission(); 1099 synchronized (mNetworkForNetId) { 1100 final Network[] result = new Network[mNetworkForNetId.size()]; 1101 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1102 result[i] = mNetworkForNetId.valueAt(i).network; 1103 } 1104 return result; 1105 } 1106 } 1107 1108 @Override 1109 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1110 // The basic principle is: if an app's traffic could possibly go over a 1111 // network, without the app doing anything multinetwork-specific, 1112 // (hence, by "default"), then include that network's capabilities in 1113 // the array. 1114 // 1115 // In the normal case, app traffic only goes over the system's default 1116 // network connection, so that's the only network returned. 1117 // 1118 // With a VPN in force, some app traffic may go into the VPN, and thus 1119 // over whatever underlying networks the VPN specifies, while other app 1120 // traffic may go over the system default network (e.g.: a split-tunnel 1121 // VPN, or an app disallowed by the VPN), so the set of networks 1122 // returned includes the VPN's underlying networks and the system 1123 // default. 1124 enforceAccessPermission(); 1125 1126 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1127 1128 NetworkAgentInfo nai = getDefaultNetwork(); 1129 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1130 if (nc != null) { 1131 result.put(nai.network, nc); 1132 } 1133 1134 if (!mLockdownEnabled) { 1135 synchronized (mVpns) { 1136 Vpn vpn = mVpns.get(userId); 1137 if (vpn != null) { 1138 Network[] networks = vpn.getUnderlyingNetworks(); 1139 if (networks != null) { 1140 for (Network network : networks) { 1141 nai = getNetworkAgentInfoForNetwork(network); 1142 nc = getNetworkCapabilitiesInternal(nai); 1143 if (nc != null) { 1144 result.put(network, nc); 1145 } 1146 } 1147 } 1148 } 1149 } 1150 } 1151 1152 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1153 out = result.values().toArray(out); 1154 return out; 1155 } 1156 1157 @Override 1158 public boolean isNetworkSupported(int networkType) { 1159 enforceAccessPermission(); 1160 return mLegacyTypeTracker.isTypeSupported(networkType); 1161 } 1162 1163 /** 1164 * Return LinkProperties for the active (i.e., connected) default 1165 * network interface. It is assumed that at most one default network 1166 * is active at a time. If more than one is active, it is indeterminate 1167 * which will be returned. 1168 * @return the ip properties for the active network, or {@code null} if 1169 * none is active 1170 */ 1171 @Override 1172 public LinkProperties getActiveLinkProperties() { 1173 enforceAccessPermission(); 1174 final int uid = Binder.getCallingUid(); 1175 NetworkState state = getUnfilteredActiveNetworkState(uid); 1176 return state.linkProperties; 1177 } 1178 1179 @Override 1180 public LinkProperties getLinkPropertiesForType(int networkType) { 1181 enforceAccessPermission(); 1182 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1183 if (nai != null) { 1184 synchronized (nai) { 1185 return new LinkProperties(nai.linkProperties); 1186 } 1187 } 1188 return null; 1189 } 1190 1191 // TODO - this should be ALL networks 1192 @Override 1193 public LinkProperties getLinkProperties(Network network) { 1194 enforceAccessPermission(); 1195 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1196 if (nai != null) { 1197 synchronized (nai) { 1198 return new LinkProperties(nai.linkProperties); 1199 } 1200 } 1201 return null; 1202 } 1203 1204 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1205 if (nai != null) { 1206 synchronized (nai) { 1207 if (nai.networkCapabilities != null) { 1208 return new NetworkCapabilities(nai.networkCapabilities); 1209 } 1210 } 1211 } 1212 return null; 1213 } 1214 1215 @Override 1216 public NetworkCapabilities getNetworkCapabilities(Network network) { 1217 enforceAccessPermission(); 1218 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1219 } 1220 1221 @Override 1222 public NetworkState[] getAllNetworkState() { 1223 // Require internal since we're handing out IMSI details 1224 enforceConnectivityInternalPermission(); 1225 1226 final ArrayList<NetworkState> result = Lists.newArrayList(); 1227 for (Network network : getAllNetworks()) { 1228 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1229 if (nai != null) { 1230 synchronized (nai) { 1231 final String subscriberId = (nai.networkMisc != null) 1232 ? nai.networkMisc.subscriberId : null; 1233 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1234 nai.networkCapabilities, network, subscriberId, null)); 1235 } 1236 } 1237 } 1238 return result.toArray(new NetworkState[result.size()]); 1239 } 1240 1241 @Override 1242 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1243 enforceAccessPermission(); 1244 final int uid = Binder.getCallingUid(); 1245 final long token = Binder.clearCallingIdentity(); 1246 try { 1247 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1248 if (state.networkInfo != null) { 1249 try { 1250 return mPolicyManager.getNetworkQuotaInfo(state); 1251 } catch (RemoteException e) { 1252 } 1253 } 1254 return null; 1255 } finally { 1256 Binder.restoreCallingIdentity(token); 1257 } 1258 } 1259 1260 @Override 1261 public boolean isActiveNetworkMetered() { 1262 enforceAccessPermission(); 1263 final int uid = Binder.getCallingUid(); 1264 final long token = Binder.clearCallingIdentity(); 1265 try { 1266 return isActiveNetworkMeteredUnchecked(uid); 1267 } finally { 1268 Binder.restoreCallingIdentity(token); 1269 } 1270 } 1271 1272 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1273 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1274 if (state.networkInfo != null) { 1275 try { 1276 return mPolicyManager.isNetworkMetered(state); 1277 } catch (RemoteException e) { 1278 } 1279 } 1280 return false; 1281 } 1282 1283 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1284 @Override 1285 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1286 int deviceType = Integer.parseInt(label); 1287 sendDataActivityBroadcast(deviceType, active, tsNanos); 1288 } 1289 }; 1290 1291 /** 1292 * Ensure that a network route exists to deliver traffic to the specified 1293 * host via the specified network interface. 1294 * @param networkType the type of the network over which traffic to the 1295 * specified host is to be routed 1296 * @param hostAddress the IP address of the host to which the route is 1297 * desired 1298 * @return {@code true} on success, {@code false} on failure 1299 */ 1300 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1301 enforceChangePermission(); 1302 if (mProtectedNetworks.contains(networkType)) { 1303 enforceConnectivityInternalPermission(); 1304 } 1305 1306 InetAddress addr; 1307 try { 1308 addr = InetAddress.getByAddress(hostAddress); 1309 } catch (UnknownHostException e) { 1310 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1311 return false; 1312 } 1313 1314 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1315 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1316 return false; 1317 } 1318 1319 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1320 if (nai == null) { 1321 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1322 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1323 } else { 1324 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1325 } 1326 return false; 1327 } 1328 1329 DetailedState netState; 1330 synchronized (nai) { 1331 netState = nai.networkInfo.getDetailedState(); 1332 } 1333 1334 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1335 if (VDBG) { 1336 log("requestRouteToHostAddress on down network " 1337 + "(" + networkType + ") - dropped" 1338 + " netState=" + netState); 1339 } 1340 return false; 1341 } 1342 1343 final int uid = Binder.getCallingUid(); 1344 final long token = Binder.clearCallingIdentity(); 1345 try { 1346 LinkProperties lp; 1347 int netId; 1348 synchronized (nai) { 1349 lp = nai.linkProperties; 1350 netId = nai.network.netId; 1351 } 1352 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1353 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1354 return ok; 1355 } finally { 1356 Binder.restoreCallingIdentity(token); 1357 } 1358 } 1359 1360 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1361 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1362 if (bestRoute == null) { 1363 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1364 } else { 1365 String iface = bestRoute.getInterface(); 1366 if (bestRoute.getGateway().equals(addr)) { 1367 // if there is no better route, add the implied hostroute for our gateway 1368 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1369 } else { 1370 // if we will connect to this through another route, add a direct route 1371 // to it's gateway 1372 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1373 } 1374 } 1375 if (DBG) log("Adding " + bestRoute + " for interface " + bestRoute.getInterface()); 1376 try { 1377 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1378 } catch (Exception e) { 1379 // never crash - catch them all 1380 if (DBG) loge("Exception trying to add a route: " + e); 1381 return false; 1382 } 1383 return true; 1384 } 1385 1386 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1387 @Override 1388 public void onUidRulesChanged(int uid, int uidRules) { 1389 // caller is NPMS, since we only register with them 1390 if (LOGD_RULES) { 1391 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1392 } 1393 1394 synchronized (mRulesLock) { 1395 // skip update when we've already applied rules 1396 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1397 if (oldRules == uidRules) return; 1398 1399 mUidRules.put(uid, uidRules); 1400 } 1401 1402 // TODO: notify UID when it has requested targeted updates 1403 } 1404 1405 @Override 1406 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1407 // caller is NPMS, since we only register with them 1408 if (LOGD_RULES) { 1409 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1410 } 1411 1412 synchronized (mRulesLock) { 1413 mMeteredIfaces.clear(); 1414 for (String iface : meteredIfaces) { 1415 mMeteredIfaces.add(iface); 1416 } 1417 } 1418 } 1419 1420 @Override 1421 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1422 // caller is NPMS, since we only register with them 1423 if (LOGD_RULES) { 1424 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1425 } 1426 } 1427 }; 1428 1429 /** 1430 * Require that the caller is either in the same user or has appropriate permission to interact 1431 * across users. 1432 * 1433 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1434 */ 1435 private void enforceCrossUserPermission(int userId) { 1436 if (userId == UserHandle.getCallingUserId()) { 1437 // Not a cross-user call. 1438 return; 1439 } 1440 mContext.enforceCallingOrSelfPermission( 1441 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1442 "ConnectivityService"); 1443 } 1444 1445 private void enforceInternetPermission() { 1446 mContext.enforceCallingOrSelfPermission( 1447 android.Manifest.permission.INTERNET, 1448 "ConnectivityService"); 1449 } 1450 1451 private void enforceAccessPermission() { 1452 mContext.enforceCallingOrSelfPermission( 1453 android.Manifest.permission.ACCESS_NETWORK_STATE, 1454 "ConnectivityService"); 1455 } 1456 1457 private void enforceChangePermission() { 1458 ConnectivityManager.enforceChangePermission(mContext); 1459 } 1460 1461 private void enforceTetherAccessPermission() { 1462 mContext.enforceCallingOrSelfPermission( 1463 android.Manifest.permission.ACCESS_NETWORK_STATE, 1464 "ConnectivityService"); 1465 } 1466 1467 private void enforceConnectivityInternalPermission() { 1468 mContext.enforceCallingOrSelfPermission( 1469 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1470 "ConnectivityService"); 1471 } 1472 1473 private void enforceKeepalivePermission() { 1474 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1475 } 1476 1477 public void sendConnectedBroadcast(NetworkInfo info) { 1478 enforceConnectivityInternalPermission(); 1479 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1480 } 1481 1482 private void sendInetConditionBroadcast(NetworkInfo info) { 1483 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1484 } 1485 1486 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1487 if (mLockdownTracker != null) { 1488 info = mLockdownTracker.augmentNetworkInfo(info); 1489 } 1490 1491 Intent intent = new Intent(bcastType); 1492 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1493 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1494 if (info.isFailover()) { 1495 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1496 info.setFailover(false); 1497 } 1498 if (info.getReason() != null) { 1499 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1500 } 1501 if (info.getExtraInfo() != null) { 1502 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1503 info.getExtraInfo()); 1504 } 1505 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1506 return intent; 1507 } 1508 1509 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1510 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1511 } 1512 1513 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1514 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1515 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1516 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1517 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1518 final long ident = Binder.clearCallingIdentity(); 1519 try { 1520 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1521 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1522 } finally { 1523 Binder.restoreCallingIdentity(ident); 1524 } 1525 } 1526 1527 private void sendStickyBroadcast(Intent intent) { 1528 synchronized(this) { 1529 if (!mSystemReady) { 1530 mInitialBroadcast = new Intent(intent); 1531 } 1532 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1533 if (DBG) { 1534 log("sendStickyBroadcast: action=" + intent.getAction()); 1535 } 1536 1537 final long ident = Binder.clearCallingIdentity(); 1538 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1539 final NetworkInfo ni = intent.getParcelableExtra( 1540 ConnectivityManager.EXTRA_NETWORK_INFO); 1541 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1542 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1543 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1544 } 1545 final IBatteryStats bs = BatteryStatsService.getService(); 1546 try { 1547 bs.noteConnectivityChanged(intent.getIntExtra( 1548 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1549 ni != null ? ni.getState().toString() : "?"); 1550 } catch (RemoteException e) { 1551 } 1552 } 1553 try { 1554 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 1555 } finally { 1556 Binder.restoreCallingIdentity(ident); 1557 } 1558 } 1559 } 1560 1561 void systemReady() { 1562 loadGlobalProxy(); 1563 1564 synchronized(this) { 1565 mSystemReady = true; 1566 if (mInitialBroadcast != null) { 1567 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1568 mInitialBroadcast = null; 1569 } 1570 } 1571 // load the global proxy at startup 1572 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1573 1574 // Try bringing up tracker, but if KeyStore isn't ready yet, wait 1575 // for user to unlock device. 1576 if (!updateLockdownVpn()) { 1577 final IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT); 1578 mContext.registerReceiver(mUserPresentReceiver, filter); 1579 } 1580 1581 // Configure whether mobile data is always on. 1582 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1583 1584 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1585 1586 mPermissionMonitor.startMonitoring(); 1587 } 1588 1589 private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() { 1590 @Override 1591 public void onReceive(Context context, Intent intent) { 1592 // Try creating lockdown tracker, since user present usually means 1593 // unlocked keystore. 1594 if (updateLockdownVpn()) { 1595 mContext.unregisterReceiver(this); 1596 } 1597 } 1598 }; 1599 1600 /** 1601 * Setup data activity tracking for the given network. 1602 * 1603 * Every {@code setupDataActivityTracking} should be paired with a 1604 * {@link #removeDataActivityTracking} for cleanup. 1605 */ 1606 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1607 final String iface = networkAgent.linkProperties.getInterfaceName(); 1608 1609 final int timeout; 1610 int type = ConnectivityManager.TYPE_NONE; 1611 1612 if (networkAgent.networkCapabilities.hasTransport( 1613 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1614 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1615 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1616 10); 1617 type = ConnectivityManager.TYPE_MOBILE; 1618 } else if (networkAgent.networkCapabilities.hasTransport( 1619 NetworkCapabilities.TRANSPORT_WIFI)) { 1620 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1621 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1622 15); 1623 type = ConnectivityManager.TYPE_WIFI; 1624 } else { 1625 // do not track any other networks 1626 timeout = 0; 1627 } 1628 1629 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1630 try { 1631 mNetd.addIdleTimer(iface, timeout, type); 1632 } catch (Exception e) { 1633 // You shall not crash! 1634 loge("Exception in setupDataActivityTracking " + e); 1635 } 1636 } 1637 } 1638 1639 /** 1640 * Remove data activity tracking when network disconnects. 1641 */ 1642 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1643 final String iface = networkAgent.linkProperties.getInterfaceName(); 1644 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1645 1646 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1647 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1648 try { 1649 // the call fails silently if no idletimer setup for this interface 1650 mNetd.removeIdleTimer(iface); 1651 } catch (Exception e) { 1652 loge("Exception in removeDataActivityTracking " + e); 1653 } 1654 } 1655 } 1656 1657 /** 1658 * Reads the network specific MTU size from reources. 1659 * and set it on it's iface. 1660 */ 1661 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1662 final String iface = newLp.getInterfaceName(); 1663 final int mtu = newLp.getMtu(); 1664 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1665 if (VDBG) log("identical MTU - not setting"); 1666 return; 1667 } 1668 1669 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1670 loge("Unexpected mtu value: " + mtu + ", " + iface); 1671 return; 1672 } 1673 1674 // Cannot set MTU without interface name 1675 if (TextUtils.isEmpty(iface)) { 1676 loge("Setting MTU size with null iface."); 1677 return; 1678 } 1679 1680 try { 1681 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1682 mNetd.setMtu(iface, mtu); 1683 } catch (Exception e) { 1684 Slog.e(TAG, "exception in setMtu()" + e); 1685 } 1686 } 1687 1688 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1689 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1690 1691 // Overridden for testing purposes to avoid writing to SystemProperties. 1692 @VisibleForTesting 1693 protected int getDefaultTcpRwnd() { 1694 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1695 } 1696 1697 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1698 if (isDefaultNetwork(nai) == false) { 1699 return; 1700 } 1701 1702 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1703 String[] values = null; 1704 if (tcpBufferSizes != null) { 1705 values = tcpBufferSizes.split(","); 1706 } 1707 1708 if (values == null || values.length != 6) { 1709 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1710 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1711 values = tcpBufferSizes.split(","); 1712 } 1713 1714 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1715 1716 try { 1717 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1718 1719 final String prefix = "/sys/kernel/ipv4/tcp_"; 1720 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1721 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1722 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1723 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1724 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1725 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1726 mCurrentTcpBufferSizes = tcpBufferSizes; 1727 } catch (IOException e) { 1728 loge("Can't set TCP buffer sizes:" + e); 1729 } 1730 1731 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1732 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1733 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1734 if (rwndValue != 0) { 1735 SystemProperties.set(sysctlKey, rwndValue.toString()); 1736 } 1737 } 1738 1739 private void flushVmDnsCache() { 1740 /* 1741 * Tell the VMs to toss their DNS caches 1742 */ 1743 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1744 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1745 /* 1746 * Connectivity events can happen before boot has completed ... 1747 */ 1748 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1749 final long ident = Binder.clearCallingIdentity(); 1750 try { 1751 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1752 } finally { 1753 Binder.restoreCallingIdentity(ident); 1754 } 1755 } 1756 1757 @Override 1758 public int getRestoreDefaultNetworkDelay(int networkType) { 1759 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1760 NETWORK_RESTORE_DELAY_PROP_NAME); 1761 if(restoreDefaultNetworkDelayStr != null && 1762 restoreDefaultNetworkDelayStr.length() != 0) { 1763 try { 1764 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1765 } catch (NumberFormatException e) { 1766 } 1767 } 1768 // if the system property isn't set, use the value for the apn type 1769 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1770 1771 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1772 (mNetConfigs[networkType] != null)) { 1773 ret = mNetConfigs[networkType].restoreTime; 1774 } 1775 return ret; 1776 } 1777 1778 private boolean argsContain(String[] args, String target) { 1779 for (String arg : args) { 1780 if (arg.equals(target)) return true; 1781 } 1782 return false; 1783 } 1784 1785 @Override 1786 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1787 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1788 if (mContext.checkCallingOrSelfPermission( 1789 android.Manifest.permission.DUMP) 1790 != PackageManager.PERMISSION_GRANTED) { 1791 pw.println("Permission Denial: can't dump ConnectivityService " + 1792 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1793 Binder.getCallingUid()); 1794 return; 1795 } 1796 1797 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1798 if (argsContain(args, "--diag")) { 1799 final long DIAG_TIME_MS = 5000; 1800 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1801 // Start gathering diagnostic information. 1802 netDiags.add(new NetworkDiagnostics( 1803 nai.network, 1804 new LinkProperties(nai.linkProperties), // Must be a copy. 1805 DIAG_TIME_MS)); 1806 } 1807 1808 for (NetworkDiagnostics netDiag : netDiags) { 1809 pw.println(); 1810 netDiag.waitForMeasurements(); 1811 netDiag.dump(pw); 1812 } 1813 1814 return; 1815 } 1816 1817 pw.print("NetworkFactories for:"); 1818 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1819 pw.print(" " + nfi.name); 1820 } 1821 pw.println(); 1822 pw.println(); 1823 1824 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1825 pw.print("Active default network: "); 1826 if (defaultNai == null) { 1827 pw.println("none"); 1828 } else { 1829 pw.println(defaultNai.network.netId); 1830 } 1831 pw.println(); 1832 1833 pw.println("Current Networks:"); 1834 pw.increaseIndent(); 1835 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1836 pw.println(nai.toString()); 1837 pw.increaseIndent(); 1838 pw.println("Requests:"); 1839 pw.increaseIndent(); 1840 for (int i = 0; i < nai.networkRequests.size(); i++) { 1841 pw.println(nai.networkRequests.valueAt(i).toString()); 1842 } 1843 pw.decreaseIndent(); 1844 pw.println("Lingered:"); 1845 pw.increaseIndent(); 1846 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1847 pw.decreaseIndent(); 1848 pw.decreaseIndent(); 1849 } 1850 pw.decreaseIndent(); 1851 pw.println(); 1852 1853 pw.println("Network Requests:"); 1854 pw.increaseIndent(); 1855 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1856 pw.println(nri.toString()); 1857 } 1858 pw.println(); 1859 pw.decreaseIndent(); 1860 1861 mLegacyTypeTracker.dump(pw); 1862 1863 synchronized (this) { 1864 pw.print("mNetTransitionWakeLock: currently " + 1865 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1866 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1867 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1868 } else { 1869 pw.println(", last requested never"); 1870 } 1871 } 1872 1873 pw.println(); 1874 mTethering.dump(fd, pw, args); 1875 1876 pw.println(); 1877 mKeepaliveTracker.dump(pw); 1878 1879 if (mInetLog != null && mInetLog.size() > 0) { 1880 pw.println(); 1881 pw.println("Inet condition reports:"); 1882 pw.increaseIndent(); 1883 for(int i = 0; i < mInetLog.size(); i++) { 1884 pw.println(mInetLog.get(i)); 1885 } 1886 pw.decreaseIndent(); 1887 } 1888 1889 if (argsContain(args, "--short") == false) { 1890 pw.println(); 1891 synchronized (mValidationLogs) { 1892 pw.println("mValidationLogs (most recent first):"); 1893 for (Pair<Network,ReadOnlyLocalLog> p : mValidationLogs) { 1894 pw.println(p.first); 1895 pw.increaseIndent(); 1896 p.second.dump(fd, pw, args); 1897 pw.decreaseIndent(); 1898 } 1899 } 1900 1901 pw.println(); 1902 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1903 pw.increaseIndent(); 1904 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1905 pw.decreaseIndent(); 1906 } 1907 } 1908 1909 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, String msg) { 1910 if (nai.network == null) return false; 1911 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1912 if (officialNai != null && officialNai.equals(nai)) return true; 1913 if (officialNai != null || VDBG) { 1914 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1915 " - " + nai); 1916 } 1917 return false; 1918 } 1919 1920 private boolean isRequest(NetworkRequest request) { 1921 return mNetworkRequests.get(request).isRequest; 1922 } 1923 1924 // must be stateless - things change under us. 1925 private class NetworkStateTrackerHandler extends Handler { 1926 public NetworkStateTrackerHandler(Looper looper) { 1927 super(looper); 1928 } 1929 1930 @Override 1931 public void handleMessage(Message msg) { 1932 NetworkInfo info; 1933 switch (msg.what) { 1934 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1935 handleAsyncChannelHalfConnect(msg); 1936 break; 1937 } 1938 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1939 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1940 if (nai != null) nai.asyncChannel.disconnect(); 1941 break; 1942 } 1943 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1944 handleAsyncChannelDisconnected(msg); 1945 break; 1946 } 1947 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1948 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1949 if (nai == null) { 1950 loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent"); 1951 } else { 1952 final NetworkCapabilities networkCapabilities = 1953 (NetworkCapabilities)msg.obj; 1954 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 1955 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 1956 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 1957 } 1958 if (nai.created && !nai.networkCapabilities.equalImmutableCapabilities( 1959 networkCapabilities)) { 1960 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 1961 + nai.networkCapabilities + " -> " + networkCapabilities); 1962 } 1963 updateCapabilities(nai, networkCapabilities); 1964 } 1965 break; 1966 } 1967 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1968 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1969 if (nai == null) { 1970 loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED"); 1971 } else { 1972 if (VDBG) { 1973 log("Update of LinkProperties for " + nai.name() + 1974 "; created=" + nai.created); 1975 } 1976 LinkProperties oldLp = nai.linkProperties; 1977 synchronized (nai) { 1978 nai.linkProperties = (LinkProperties)msg.obj; 1979 } 1980 if (nai.created) updateLinkProperties(nai, oldLp); 1981 } 1982 break; 1983 } 1984 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1985 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1986 if (nai == null) { 1987 loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent"); 1988 break; 1989 } 1990 info = (NetworkInfo) msg.obj; 1991 updateNetworkInfo(nai, info); 1992 break; 1993 } 1994 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1995 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1996 if (nai == null) { 1997 loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent"); 1998 break; 1999 } 2000 Integer score = (Integer) msg.obj; 2001 if (score != null) updateNetworkScore(nai, score.intValue()); 2002 break; 2003 } 2004 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2005 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2006 if (nai == null) { 2007 loge("EVENT_UID_RANGES_ADDED from unknown NetworkAgent"); 2008 break; 2009 } 2010 try { 2011 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2012 } catch (Exception e) { 2013 // Never crash! 2014 loge("Exception in addVpnUidRanges: " + e); 2015 } 2016 break; 2017 } 2018 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2019 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2020 if (nai == null) { 2021 loge("EVENT_UID_RANGES_REMOVED from unknown NetworkAgent"); 2022 break; 2023 } 2024 try { 2025 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2026 } catch (Exception e) { 2027 // Never crash! 2028 loge("Exception in removeVpnUidRanges: " + e); 2029 } 2030 break; 2031 } 2032 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2033 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2034 if (nai == null) { 2035 loge("EVENT_SET_EXPLICITLY_SELECTED from unknown NetworkAgent"); 2036 break; 2037 } 2038 if (nai.created && !nai.networkMisc.explicitlySelected) { 2039 loge("ERROR: created network explicitly selected."); 2040 } 2041 nai.networkMisc.explicitlySelected = true; 2042 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2043 break; 2044 } 2045 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2046 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2047 if (nai == null) { 2048 loge("EVENT_PACKET_KEEPALIVE from unknown NetworkAgent"); 2049 break; 2050 } 2051 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2052 break; 2053 } 2054 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2055 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2056 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_TESTED")) { 2057 final boolean valid = 2058 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2059 if (DBG) log(nai.name() + " validation " + (valid ? " passed" : "failed")); 2060 if (valid != nai.lastValidated) { 2061 final int oldScore = nai.getCurrentScore(); 2062 nai.lastValidated = valid; 2063 nai.everValidated |= valid; 2064 updateCapabilities(nai, nai.networkCapabilities); 2065 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2066 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2067 } 2068 updateInetCondition(nai); 2069 // Let the NetworkAgent know the state of its network 2070 nai.asyncChannel.sendMessage( 2071 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2072 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2073 0, null); 2074 } 2075 break; 2076 } 2077 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 2078 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2079 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_LINGER_COMPLETE")) { 2080 handleLingerComplete(nai); 2081 } 2082 break; 2083 } 2084 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2085 final int netId = msg.arg2; 2086 final boolean visible = (msg.arg1 != 0); 2087 final NetworkAgentInfo nai; 2088 synchronized (mNetworkForNetId) { 2089 nai = mNetworkForNetId.get(netId); 2090 } 2091 // If captive portal status has changed, update capabilities. 2092 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2093 nai.lastCaptivePortalDetected = visible; 2094 nai.everCaptivePortalDetected |= visible; 2095 updateCapabilities(nai, nai.networkCapabilities); 2096 } 2097 if (!visible) { 2098 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2099 } else { 2100 if (nai == null) { 2101 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2102 break; 2103 } 2104 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2105 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2106 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2107 } 2108 break; 2109 } 2110 } 2111 } 2112 } 2113 2114 private void linger(NetworkAgentInfo nai) { 2115 nai.lingering = true; 2116 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 2117 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 2118 } 2119 2120 // Cancel any lingering so the linger timeout doesn't teardown a network. 2121 // This should be called when a network begins satisfying a NetworkRequest. 2122 // Note: depending on what state the NetworkMonitor is in (e.g., 2123 // if it's awaiting captive portal login, or if validation failed), this 2124 // may trigger a re-evaluation of the network. 2125 private void unlinger(NetworkAgentInfo nai) { 2126 nai.networkLingered.clear(); 2127 if (!nai.lingering) return; 2128 nai.lingering = false; 2129 if (VDBG) log("Canceling linger of " + nai.name()); 2130 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2131 } 2132 2133 private void handleAsyncChannelHalfConnect(Message msg) { 2134 AsyncChannel ac = (AsyncChannel) msg.obj; 2135 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2136 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2137 if (VDBG) log("NetworkFactory connected"); 2138 // A network factory has connected. Send it all current NetworkRequests. 2139 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2140 if (nri.isRequest == false) continue; 2141 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2142 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2143 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2144 } 2145 } else { 2146 loge("Error connecting NetworkFactory"); 2147 mNetworkFactoryInfos.remove(msg.obj); 2148 } 2149 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2150 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2151 if (VDBG) log("NetworkAgent connected"); 2152 // A network agent has requested a connection. Establish the connection. 2153 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2154 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2155 } else { 2156 loge("Error connecting NetworkAgent"); 2157 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2158 if (nai != null) { 2159 final boolean wasDefault = isDefaultNetwork(nai); 2160 synchronized (mNetworkForNetId) { 2161 mNetworkForNetId.remove(nai.network.netId); 2162 mNetIdInUse.delete(nai.network.netId); 2163 } 2164 // Just in case. 2165 mLegacyTypeTracker.remove(nai, wasDefault); 2166 } 2167 } 2168 } 2169 } 2170 2171 private void handleAsyncChannelDisconnected(Message msg) { 2172 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2173 if (nai != null) { 2174 if (DBG) { 2175 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2176 } 2177 // A network agent has disconnected. 2178 // TODO - if we move the logic to the network agent (have them disconnect 2179 // because they lost all their requests or because their score isn't good) 2180 // then they would disconnect organically, report their new state and then 2181 // disconnect the channel. 2182 if (nai.networkInfo.isConnected()) { 2183 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2184 null, null); 2185 } 2186 final boolean wasDefault = isDefaultNetwork(nai); 2187 if (wasDefault) { 2188 mDefaultInetConditionPublished = 0; 2189 } 2190 notifyIfacesChanged(); 2191 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2192 // by other networks that are already connected. Perhaps that can be done by 2193 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2194 // of rematchAllNetworksAndRequests 2195 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2196 mKeepaliveTracker.handleStopAllKeepalives(nai, 2197 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2198 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2199 if (nai.apfFilter != null) nai.apfFilter.shutdown(); 2200 mNetworkAgentInfos.remove(msg.replyTo); 2201 updateClat(null, nai.linkProperties, nai); 2202 synchronized (mNetworkForNetId) { 2203 // Remove the NetworkAgent, but don't mark the netId as 2204 // available until we've told netd to delete it below. 2205 mNetworkForNetId.remove(nai.network.netId); 2206 } 2207 // Remove all previously satisfied requests. 2208 for (int i = 0; i < nai.networkRequests.size(); i++) { 2209 NetworkRequest request = nai.networkRequests.valueAt(i); 2210 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2211 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2212 mNetworkForRequestId.remove(request.requestId); 2213 sendUpdatedScoreToFactories(request, 0); 2214 } 2215 } 2216 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2217 removeDataActivityTracking(nai); 2218 notifyLockdownVpn(nai); 2219 requestNetworkTransitionWakelock(nai.name()); 2220 } 2221 mLegacyTypeTracker.remove(nai, wasDefault); 2222 rematchAllNetworksAndRequests(null, 0); 2223 if (nai.created) { 2224 // Tell netd to clean up the configuration for this network 2225 // (routing rules, DNS, etc). 2226 // This may be slow as it requires a lot of netd shelling out to ip and 2227 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2228 // after we've rematched networks with requests which should make a potential 2229 // fallback network the default or requested a new network from the 2230 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2231 // long time. 2232 try { 2233 mNetd.removeNetwork(nai.network.netId); 2234 } catch (Exception e) { 2235 loge("Exception removing network: " + e); 2236 } 2237 } 2238 synchronized (mNetworkForNetId) { 2239 mNetIdInUse.delete(nai.network.netId); 2240 } 2241 } else { 2242 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2243 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2244 } 2245 } 2246 2247 // If this method proves to be too slow then we can maintain a separate 2248 // pendingIntent => NetworkRequestInfo map. 2249 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2250 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2251 Intent intent = pendingIntent.getIntent(); 2252 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2253 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2254 if (existingPendingIntent != null && 2255 existingPendingIntent.getIntent().filterEquals(intent)) { 2256 return entry.getValue(); 2257 } 2258 } 2259 return null; 2260 } 2261 2262 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2263 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2264 2265 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2266 if (existingRequest != null) { // remove the existing request. 2267 if (DBG) log("Replacing " + existingRequest.request + " with " 2268 + nri.request + " because their intents matched."); 2269 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2270 } 2271 handleRegisterNetworkRequest(nri); 2272 } 2273 2274 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2275 mNetworkRequests.put(nri.request, nri); 2276 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2277 if (!nri.isRequest) { 2278 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2279 if (nri.request.networkCapabilities.hasSignalStrength() && 2280 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2281 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2282 } 2283 } 2284 } 2285 rematchAllNetworksAndRequests(null, 0); 2286 if (nri.isRequest && mNetworkForRequestId.get(nri.request.requestId) == null) { 2287 sendUpdatedScoreToFactories(nri.request, 0); 2288 } 2289 } 2290 2291 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2292 int callingUid) { 2293 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2294 if (nri != null) { 2295 handleReleaseNetworkRequest(nri.request, callingUid); 2296 } 2297 } 2298 2299 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2300 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2301 // would it have a chance of satisfying any NetworkRequests. 2302 private boolean unneeded(NetworkAgentInfo nai) { 2303 if (!nai.created || nai.isVPN() || nai.lingering) return false; 2304 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2305 // If this Network is already the highest scoring Network for a request, or if 2306 // there is hope for it to become one if it validated, then it is needed. 2307 if (nri.isRequest && nai.satisfies(nri.request) && 2308 (nai.networkRequests.get(nri.request.requestId) != null || 2309 // Note that this catches two important cases: 2310 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2311 // is currently satisfying the request. This is desirable when 2312 // cellular ends up validating but WiFi does not. 2313 // 2. Unvalidated WiFi will not be reaped when validated cellular 2314 // is currently satisfying the request. This is desirable when 2315 // WiFi ends up validating and out scoring cellular. 2316 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2317 nai.getCurrentScoreAsValidated())) { 2318 return false; 2319 } 2320 } 2321 return true; 2322 } 2323 2324 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2325 NetworkRequestInfo nri = mNetworkRequests.get(request); 2326 if (nri != null) { 2327 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2328 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2329 return; 2330 } 2331 if (DBG) log("releasing NetworkRequest " + request); 2332 nri.unlinkDeathRecipient(); 2333 mNetworkRequests.remove(request); 2334 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2335 if (nri.isRequest) { 2336 // Find all networks that are satisfying this request and remove the request 2337 // from their request lists. 2338 // TODO - it's my understanding that for a request there is only a single 2339 // network satisfying it, so this loop is wasteful 2340 boolean wasKept = false; 2341 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2342 if (nai.networkRequests.get(nri.request.requestId) != null) { 2343 nai.networkRequests.remove(nri.request.requestId); 2344 if (DBG) { 2345 log(" Removing from current network " + nai.name() + 2346 ", leaving " + nai.networkRequests.size() + 2347 " requests."); 2348 } 2349 if (unneeded(nai)) { 2350 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2351 teardownUnneededNetwork(nai); 2352 } else { 2353 // suspect there should only be one pass through here 2354 // but if any were kept do the check below 2355 wasKept |= true; 2356 } 2357 } 2358 } 2359 2360 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2361 if (nai != null) { 2362 mNetworkForRequestId.remove(nri.request.requestId); 2363 } 2364 // Maintain the illusion. When this request arrived, we might have pretended 2365 // that a network connected to serve it, even though the network was already 2366 // connected. Now that this request has gone away, we might have to pretend 2367 // that the network disconnected. LegacyTypeTracker will generate that 2368 // phantom disconnect for this type. 2369 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2370 boolean doRemove = true; 2371 if (wasKept) { 2372 // check if any of the remaining requests for this network are for the 2373 // same legacy type - if so, don't remove the nai 2374 for (int i = 0; i < nai.networkRequests.size(); i++) { 2375 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2376 if (otherRequest.legacyType == nri.request.legacyType && 2377 isRequest(otherRequest)) { 2378 if (DBG) log(" still have other legacy request - leaving"); 2379 doRemove = false; 2380 } 2381 } 2382 } 2383 2384 if (doRemove) { 2385 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2386 } 2387 } 2388 2389 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2390 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2391 nri.request); 2392 } 2393 } else { 2394 // listens don't have a singular affectedNetwork. Check all networks to see 2395 // if this listen request applies and remove it. 2396 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2397 nai.networkRequests.remove(nri.request.requestId); 2398 if (nri.request.networkCapabilities.hasSignalStrength() && 2399 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2400 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2401 } 2402 } 2403 } 2404 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2405 } 2406 } 2407 2408 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2409 enforceConnectivityInternalPermission(); 2410 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2411 accept ? 1 : 0, always ? 1: 0, network)); 2412 } 2413 2414 public void pushApfProgramToNetwork(NetworkAgentInfo nai, byte[] program) { 2415 enforceConnectivityInternalPermission(); 2416 Message msg = mHandler.obtainMessage(EVENT_PUSH_APF_PROGRAM_TO_NETWORK, program); 2417 msg.replyTo = nai.messenger; 2418 mHandler.sendMessage(msg); 2419 } 2420 2421 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2422 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2423 " accept=" + accept + " always=" + always); 2424 2425 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2426 if (nai == null) { 2427 // Nothing to do. 2428 return; 2429 } 2430 2431 if (nai.everValidated) { 2432 // The network validated while the dialog box was up. Take no action. 2433 return; 2434 } 2435 2436 if (!nai.networkMisc.explicitlySelected) { 2437 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2438 } 2439 2440 if (accept != nai.networkMisc.acceptUnvalidated) { 2441 int oldScore = nai.getCurrentScore(); 2442 nai.networkMisc.acceptUnvalidated = accept; 2443 rematchAllNetworksAndRequests(nai, oldScore); 2444 sendUpdatedScoreToFactories(nai); 2445 } 2446 2447 if (always) { 2448 nai.asyncChannel.sendMessage( 2449 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2450 } 2451 2452 if (!accept) { 2453 // Tell the NetworkAgent to not automatically reconnect to the network. 2454 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2455 // Teardown the nework. 2456 teardownUnneededNetwork(nai); 2457 } 2458 2459 } 2460 2461 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2462 if (DBG) log("scheduleUnvalidatedPrompt " + nai.network); 2463 mHandler.sendMessageDelayed( 2464 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2465 PROMPT_UNVALIDATED_DELAY_MS); 2466 } 2467 2468 private void handlePromptUnvalidated(Network network) { 2469 if (DBG) log("handlePromptUnvalidated " + network); 2470 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2471 2472 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2473 // we haven't already been told to switch to it regardless of whether it validated or not. 2474 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2475 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2476 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2477 return; 2478 } 2479 2480 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2481 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2482 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2483 intent.setClassName("com.android.settings", 2484 "com.android.settings.wifi.WifiNoInternetDialog"); 2485 2486 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2487 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2488 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2489 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2490 } 2491 2492 private class InternalHandler extends Handler { 2493 public InternalHandler(Looper looper) { 2494 super(looper); 2495 } 2496 2497 @Override 2498 public void handleMessage(Message msg) { 2499 switch (msg.what) { 2500 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2501 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2502 String causedBy = null; 2503 synchronized (ConnectivityService.this) { 2504 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2505 mNetTransitionWakeLock.isHeld()) { 2506 mNetTransitionWakeLock.release(); 2507 causedBy = mNetTransitionWakeLockCausedBy; 2508 } else { 2509 break; 2510 } 2511 } 2512 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2513 log("Failed to find a new network - expiring NetTransition Wakelock"); 2514 } else { 2515 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2516 " cleared because we found a replacement network"); 2517 } 2518 break; 2519 } 2520 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2521 handleDeprecatedGlobalHttpProxy(); 2522 break; 2523 } 2524 case EVENT_SEND_STICKY_BROADCAST_INTENT: { 2525 Intent intent = (Intent)msg.obj; 2526 sendStickyBroadcast(intent); 2527 break; 2528 } 2529 case EVENT_PROXY_HAS_CHANGED: { 2530 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2531 break; 2532 } 2533 case EVENT_REGISTER_NETWORK_FACTORY: { 2534 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2535 break; 2536 } 2537 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2538 handleUnregisterNetworkFactory((Messenger)msg.obj); 2539 break; 2540 } 2541 case EVENT_REGISTER_NETWORK_AGENT: { 2542 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2543 break; 2544 } 2545 case EVENT_REGISTER_NETWORK_REQUEST: 2546 case EVENT_REGISTER_NETWORK_LISTENER: { 2547 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2548 break; 2549 } 2550 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2551 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2552 handleRegisterNetworkRequestWithIntent(msg); 2553 break; 2554 } 2555 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2556 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2557 break; 2558 } 2559 case EVENT_RELEASE_NETWORK_REQUEST: { 2560 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2561 break; 2562 } 2563 case EVENT_SET_ACCEPT_UNVALIDATED: { 2564 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2565 break; 2566 } 2567 case EVENT_PROMPT_UNVALIDATED: { 2568 handlePromptUnvalidated((Network) msg.obj); 2569 break; 2570 } 2571 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2572 handleMobileDataAlwaysOn(); 2573 break; 2574 } 2575 case EVENT_PUSH_APF_PROGRAM_TO_NETWORK: { 2576 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2577 if (nai == null) { 2578 loge("EVENT_PUSH_APF_PROGRAM_TO_NETWORK from unknown NetworkAgent"); 2579 } else { 2580 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PUSH_APF_PROGRAM, 2581 (byte[]) msg.obj); 2582 } 2583 break; 2584 } 2585 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2586 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2587 mKeepaliveTracker.handleStartKeepalive(msg); 2588 break; 2589 } 2590 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2591 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2592 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2593 int slot = msg.arg1; 2594 int reason = msg.arg2; 2595 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2596 break; 2597 } 2598 case EVENT_SYSTEM_READY: { 2599 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2600 nai.networkMonitor.systemReady = true; 2601 } 2602 break; 2603 } 2604 } 2605 } 2606 } 2607 2608 // javadoc from interface 2609 public int tether(String iface) { 2610 ConnectivityManager.enforceTetherChangePermission(mContext); 2611 if (isTetheringSupported()) { 2612 return mTethering.tether(iface); 2613 } else { 2614 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2615 } 2616 } 2617 2618 // javadoc from interface 2619 public int untether(String iface) { 2620 ConnectivityManager.enforceTetherChangePermission(mContext); 2621 2622 if (isTetheringSupported()) { 2623 return mTethering.untether(iface); 2624 } else { 2625 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2626 } 2627 } 2628 2629 // javadoc from interface 2630 public int getLastTetherError(String iface) { 2631 enforceTetherAccessPermission(); 2632 2633 if (isTetheringSupported()) { 2634 return mTethering.getLastTetherError(iface); 2635 } else { 2636 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2637 } 2638 } 2639 2640 // TODO - proper iface API for selection by property, inspection, etc 2641 public String[] getTetherableUsbRegexs() { 2642 enforceTetherAccessPermission(); 2643 if (isTetheringSupported()) { 2644 return mTethering.getTetherableUsbRegexs(); 2645 } else { 2646 return new String[0]; 2647 } 2648 } 2649 2650 public String[] getTetherableWifiRegexs() { 2651 enforceTetherAccessPermission(); 2652 if (isTetheringSupported()) { 2653 return mTethering.getTetherableWifiRegexs(); 2654 } else { 2655 return new String[0]; 2656 } 2657 } 2658 2659 public String[] getTetherableBluetoothRegexs() { 2660 enforceTetherAccessPermission(); 2661 if (isTetheringSupported()) { 2662 return mTethering.getTetherableBluetoothRegexs(); 2663 } else { 2664 return new String[0]; 2665 } 2666 } 2667 2668 public int setUsbTethering(boolean enable) { 2669 ConnectivityManager.enforceTetherChangePermission(mContext); 2670 if (isTetheringSupported()) { 2671 return mTethering.setUsbTethering(enable); 2672 } else { 2673 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2674 } 2675 } 2676 2677 // TODO - move iface listing, queries, etc to new module 2678 // javadoc from interface 2679 public String[] getTetherableIfaces() { 2680 enforceTetherAccessPermission(); 2681 return mTethering.getTetherableIfaces(); 2682 } 2683 2684 public String[] getTetheredIfaces() { 2685 enforceTetherAccessPermission(); 2686 return mTethering.getTetheredIfaces(); 2687 } 2688 2689 public String[] getTetheringErroredIfaces() { 2690 enforceTetherAccessPermission(); 2691 return mTethering.getErroredIfaces(); 2692 } 2693 2694 public String[] getTetheredDhcpRanges() { 2695 enforceConnectivityInternalPermission(); 2696 return mTethering.getTetheredDhcpRanges(); 2697 } 2698 2699 // if ro.tether.denied = true we default to no tethering 2700 // gservices could set the secure setting to 1 though to enable it on a build where it 2701 // had previously been turned off. 2702 public boolean isTetheringSupported() { 2703 enforceTetherAccessPermission(); 2704 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2705 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2706 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2707 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2708 return tetherEnabledInSettings && ((mTethering.getTetherableUsbRegexs().length != 0 || 2709 mTethering.getTetherableWifiRegexs().length != 0 || 2710 mTethering.getTetherableBluetoothRegexs().length != 0) && 2711 mTethering.getUpstreamIfaceTypes().length != 0); 2712 } 2713 2714 // Called when we lose the default network and have no replacement yet. 2715 // This will automatically be cleared after X seconds or a new default network 2716 // becomes CONNECTED, whichever happens first. The timer is started by the 2717 // first caller and not restarted by subsequent callers. 2718 private void requestNetworkTransitionWakelock(String forWhom) { 2719 int serialNum = 0; 2720 synchronized (this) { 2721 if (mNetTransitionWakeLock.isHeld()) return; 2722 serialNum = ++mNetTransitionWakeLockSerialNumber; 2723 mNetTransitionWakeLock.acquire(); 2724 mNetTransitionWakeLockCausedBy = forWhom; 2725 } 2726 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2727 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2728 mNetTransitionWakeLockTimeout); 2729 return; 2730 } 2731 2732 // 100 percent is full good, 0 is full bad. 2733 public void reportInetCondition(int networkType, int percentage) { 2734 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2735 if (nai == null) return; 2736 reportNetworkConnectivity(nai.network, percentage > 50); 2737 } 2738 2739 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2740 enforceAccessPermission(); 2741 enforceInternetPermission(); 2742 2743 NetworkAgentInfo nai; 2744 if (network == null) { 2745 nai = getDefaultNetwork(); 2746 } else { 2747 nai = getNetworkAgentInfoForNetwork(network); 2748 } 2749 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2750 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2751 return; 2752 } 2753 // Revalidate if the app report does not match our current validated state. 2754 if (hasConnectivity == nai.lastValidated) return; 2755 final int uid = Binder.getCallingUid(); 2756 if (DBG) { 2757 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2758 ") by " + uid); 2759 } 2760 synchronized (nai) { 2761 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2762 // which isn't meant to work on uncreated networks. 2763 if (!nai.created) return; 2764 2765 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2766 2767 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2768 } 2769 } 2770 2771 private ProxyInfo getDefaultProxy() { 2772 // this information is already available as a world read/writable jvm property 2773 // so this API change wouldn't have a benifit. It also breaks the passing 2774 // of proxy info to all the JVMs. 2775 // enforceAccessPermission(); 2776 synchronized (mProxyLock) { 2777 ProxyInfo ret = mGlobalProxy; 2778 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2779 return ret; 2780 } 2781 } 2782 2783 public ProxyInfo getProxyForNetwork(Network network) { 2784 if (network == null) return getDefaultProxy(); 2785 final ProxyInfo globalProxy = getGlobalProxy(); 2786 if (globalProxy != null) return globalProxy; 2787 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 2788 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 2789 // caller may not have. 2790 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2791 if (nai == null) return null; 2792 synchronized (nai) { 2793 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 2794 if (proxyInfo == null) return null; 2795 return new ProxyInfo(proxyInfo); 2796 } 2797 } 2798 2799 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2800 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2801 // proxy is null then there is no proxy in place). 2802 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2803 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2804 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2805 proxy = null; 2806 } 2807 return proxy; 2808 } 2809 2810 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2811 // better for determining if a new proxy broadcast is necessary: 2812 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2813 // avoid unnecessary broadcasts. 2814 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2815 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2816 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2817 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2818 // all set. 2819 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2820 a = canonicalizeProxyInfo(a); 2821 b = canonicalizeProxyInfo(b); 2822 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2823 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2824 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2825 } 2826 2827 public void setGlobalProxy(ProxyInfo proxyProperties) { 2828 enforceConnectivityInternalPermission(); 2829 2830 synchronized (mProxyLock) { 2831 if (proxyProperties == mGlobalProxy) return; 2832 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2833 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2834 2835 String host = ""; 2836 int port = 0; 2837 String exclList = ""; 2838 String pacFileUrl = ""; 2839 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2840 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2841 if (!proxyProperties.isValid()) { 2842 if (DBG) 2843 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2844 return; 2845 } 2846 mGlobalProxy = new ProxyInfo(proxyProperties); 2847 host = mGlobalProxy.getHost(); 2848 port = mGlobalProxy.getPort(); 2849 exclList = mGlobalProxy.getExclusionListAsString(); 2850 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2851 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2852 } 2853 } else { 2854 mGlobalProxy = null; 2855 } 2856 ContentResolver res = mContext.getContentResolver(); 2857 final long token = Binder.clearCallingIdentity(); 2858 try { 2859 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2860 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2861 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2862 exclList); 2863 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2864 } finally { 2865 Binder.restoreCallingIdentity(token); 2866 } 2867 2868 if (mGlobalProxy == null) { 2869 proxyProperties = mDefaultProxy; 2870 } 2871 sendProxyBroadcast(proxyProperties); 2872 } 2873 } 2874 2875 private void loadGlobalProxy() { 2876 ContentResolver res = mContext.getContentResolver(); 2877 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2878 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2879 String exclList = Settings.Global.getString(res, 2880 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2881 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2882 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2883 ProxyInfo proxyProperties; 2884 if (!TextUtils.isEmpty(pacFileUrl)) { 2885 proxyProperties = new ProxyInfo(pacFileUrl); 2886 } else { 2887 proxyProperties = new ProxyInfo(host, port, exclList); 2888 } 2889 if (!proxyProperties.isValid()) { 2890 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2891 return; 2892 } 2893 2894 synchronized (mProxyLock) { 2895 mGlobalProxy = proxyProperties; 2896 } 2897 } 2898 } 2899 2900 public ProxyInfo getGlobalProxy() { 2901 // this information is already available as a world read/writable jvm property 2902 // so this API change wouldn't have a benifit. It also breaks the passing 2903 // of proxy info to all the JVMs. 2904 // enforceAccessPermission(); 2905 synchronized (mProxyLock) { 2906 return mGlobalProxy; 2907 } 2908 } 2909 2910 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2911 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2912 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2913 proxy = null; 2914 } 2915 synchronized (mProxyLock) { 2916 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2917 if (mDefaultProxy == proxy) return; // catches repeated nulls 2918 if (proxy != null && !proxy.isValid()) { 2919 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2920 return; 2921 } 2922 2923 // This call could be coming from the PacManager, containing the port of the local 2924 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2925 // global (to get the correct local port), and send a broadcast. 2926 // TODO: Switch PacManager to have its own message to send back rather than 2927 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2928 if ((mGlobalProxy != null) && (proxy != null) 2929 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2930 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2931 mGlobalProxy = proxy; 2932 sendProxyBroadcast(mGlobalProxy); 2933 return; 2934 } 2935 mDefaultProxy = proxy; 2936 2937 if (mGlobalProxy != null) return; 2938 if (!mDefaultProxyDisabled) { 2939 sendProxyBroadcast(proxy); 2940 } 2941 } 2942 } 2943 2944 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2945 // This method gets called when any network changes proxy, but the broadcast only ever contains 2946 // the default proxy (even if it hasn't changed). 2947 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2948 // world where an app might be bound to a non-default network. 2949 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2950 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2951 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2952 2953 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2954 sendProxyBroadcast(getDefaultProxy()); 2955 } 2956 } 2957 2958 private void handleDeprecatedGlobalHttpProxy() { 2959 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2960 Settings.Global.HTTP_PROXY); 2961 if (!TextUtils.isEmpty(proxy)) { 2962 String data[] = proxy.split(":"); 2963 if (data.length == 0) { 2964 return; 2965 } 2966 2967 String proxyHost = data[0]; 2968 int proxyPort = 8080; 2969 if (data.length > 1) { 2970 try { 2971 proxyPort = Integer.parseInt(data[1]); 2972 } catch (NumberFormatException e) { 2973 return; 2974 } 2975 } 2976 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2977 setGlobalProxy(p); 2978 } 2979 } 2980 2981 private void sendProxyBroadcast(ProxyInfo proxy) { 2982 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2983 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2984 if (DBG) log("sending Proxy Broadcast for " + proxy); 2985 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2986 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2987 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2988 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2989 final long ident = Binder.clearCallingIdentity(); 2990 try { 2991 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2992 } finally { 2993 Binder.restoreCallingIdentity(ident); 2994 } 2995 } 2996 2997 private static class SettingsObserver extends ContentObserver { 2998 final private HashMap<Uri, Integer> mUriEventMap; 2999 final private Context mContext; 3000 final private Handler mHandler; 3001 3002 SettingsObserver(Context context, Handler handler) { 3003 super(null); 3004 mUriEventMap = new HashMap<Uri, Integer>(); 3005 mContext = context; 3006 mHandler = handler; 3007 } 3008 3009 void observe(Uri uri, int what) { 3010 mUriEventMap.put(uri, what); 3011 final ContentResolver resolver = mContext.getContentResolver(); 3012 resolver.registerContentObserver(uri, false, this); 3013 } 3014 3015 @Override 3016 public void onChange(boolean selfChange) { 3017 Slog.wtf(TAG, "Should never be reached."); 3018 } 3019 3020 @Override 3021 public void onChange(boolean selfChange, Uri uri) { 3022 final Integer what = mUriEventMap.get(uri); 3023 if (what != null) { 3024 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3025 } else { 3026 loge("No matching event to send for URI=" + uri); 3027 } 3028 } 3029 } 3030 3031 private static void log(String s) { 3032 Slog.d(TAG, s); 3033 } 3034 3035 private static void loge(String s) { 3036 Slog.e(TAG, s); 3037 } 3038 3039 private static <T> T checkNotNull(T value, String message) { 3040 if (value == null) { 3041 throw new NullPointerException(message); 3042 } 3043 return value; 3044 } 3045 3046 /** 3047 * Prepare for a VPN application. 3048 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3049 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3050 * 3051 * @param oldPackage Package name of the application which currently controls VPN, which will 3052 * be replaced. If there is no such application, this should should either be 3053 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3054 * @param newPackage Package name of the application which should gain control of VPN, or 3055 * {@code null} to disable. 3056 * @param userId User for whom to prepare the new VPN. 3057 * 3058 * @hide 3059 */ 3060 @Override 3061 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3062 int userId) { 3063 enforceCrossUserPermission(userId); 3064 throwIfLockdownEnabled(); 3065 3066 synchronized(mVpns) { 3067 Vpn vpn = mVpns.get(userId); 3068 if (vpn != null) { 3069 return vpn.prepare(oldPackage, newPackage); 3070 } else { 3071 return false; 3072 } 3073 } 3074 } 3075 3076 /** 3077 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3078 * This method is used by system-privileged apps. 3079 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3080 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3081 * 3082 * @param packageName The package for which authorization state should change. 3083 * @param userId User for whom {@code packageName} is installed. 3084 * @param authorized {@code true} if this app should be able to start a VPN connection without 3085 * explicit user approval, {@code false} if not. 3086 * 3087 * @hide 3088 */ 3089 @Override 3090 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3091 enforceCrossUserPermission(userId); 3092 3093 synchronized(mVpns) { 3094 Vpn vpn = mVpns.get(userId); 3095 if (vpn != null) { 3096 vpn.setPackageAuthorization(packageName, authorized); 3097 } 3098 } 3099 } 3100 3101 /** 3102 * Configure a TUN interface and return its file descriptor. Parameters 3103 * are encoded and opaque to this class. This method is used by VpnBuilder 3104 * and not available in ConnectivityManager. Permissions are checked in 3105 * Vpn class. 3106 * @hide 3107 */ 3108 @Override 3109 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3110 throwIfLockdownEnabled(); 3111 int user = UserHandle.getUserId(Binder.getCallingUid()); 3112 synchronized(mVpns) { 3113 return mVpns.get(user).establish(config); 3114 } 3115 } 3116 3117 /** 3118 * Start legacy VPN, controlling native daemons as needed. Creates a 3119 * secondary thread to perform connection work, returning quickly. 3120 */ 3121 @Override 3122 public void startLegacyVpn(VpnProfile profile) { 3123 throwIfLockdownEnabled(); 3124 final LinkProperties egress = getActiveLinkProperties(); 3125 if (egress == null) { 3126 throw new IllegalStateException("Missing active network connection"); 3127 } 3128 int user = UserHandle.getUserId(Binder.getCallingUid()); 3129 synchronized(mVpns) { 3130 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3131 } 3132 } 3133 3134 /** 3135 * Return the information of the ongoing legacy VPN. This method is used 3136 * by VpnSettings and not available in ConnectivityManager. Permissions 3137 * are checked in Vpn class. 3138 */ 3139 @Override 3140 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3141 enforceCrossUserPermission(userId); 3142 if (mLockdownEnabled) { 3143 return null; 3144 } 3145 3146 synchronized(mVpns) { 3147 return mVpns.get(userId).getLegacyVpnInfo(); 3148 } 3149 } 3150 3151 /** 3152 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3153 * and not available in ConnectivityManager. 3154 */ 3155 @Override 3156 public VpnInfo[] getAllVpnInfo() { 3157 enforceConnectivityInternalPermission(); 3158 if (mLockdownEnabled) { 3159 return new VpnInfo[0]; 3160 } 3161 3162 synchronized(mVpns) { 3163 List<VpnInfo> infoList = new ArrayList<>(); 3164 for (int i = 0; i < mVpns.size(); i++) { 3165 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3166 if (info != null) { 3167 infoList.add(info); 3168 } 3169 } 3170 return infoList.toArray(new VpnInfo[infoList.size()]); 3171 } 3172 } 3173 3174 /** 3175 * @return VPN information for accounting, or null if we can't retrieve all required 3176 * information, e.g primary underlying iface. 3177 */ 3178 @Nullable 3179 private VpnInfo createVpnInfo(Vpn vpn) { 3180 VpnInfo info = vpn.getVpnInfo(); 3181 if (info == null) { 3182 return null; 3183 } 3184 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3185 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3186 // the underlyingNetworks list. 3187 if (underlyingNetworks == null) { 3188 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3189 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3190 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3191 } 3192 } else if (underlyingNetworks.length > 0) { 3193 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3194 if (linkProperties != null) { 3195 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3196 } 3197 } 3198 return info.primaryUnderlyingIface == null ? null : info; 3199 } 3200 3201 /** 3202 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3203 * VpnDialogs and not available in ConnectivityManager. 3204 * Permissions are checked in Vpn class. 3205 * @hide 3206 */ 3207 @Override 3208 public VpnConfig getVpnConfig(int userId) { 3209 enforceCrossUserPermission(userId); 3210 synchronized(mVpns) { 3211 Vpn vpn = mVpns.get(userId); 3212 if (vpn != null) { 3213 return vpn.getVpnConfig(); 3214 } else { 3215 return null; 3216 } 3217 } 3218 } 3219 3220 @Override 3221 public boolean updateLockdownVpn() { 3222 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3223 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3224 return false; 3225 } 3226 3227 // Tear down existing lockdown if profile was removed 3228 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3229 if (mLockdownEnabled) { 3230 if (!mKeyStore.isUnlocked()) { 3231 Slog.w(TAG, "KeyStore locked; unable to create LockdownTracker"); 3232 return false; 3233 } 3234 3235 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3236 final VpnProfile profile = VpnProfile.decode( 3237 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3238 if (profile == null) { 3239 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3240 setLockdownTracker(null); 3241 return true; 3242 } 3243 int user = UserHandle.getUserId(Binder.getCallingUid()); 3244 synchronized(mVpns) { 3245 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, mVpns.get(user), 3246 profile)); 3247 } 3248 } else { 3249 setLockdownTracker(null); 3250 } 3251 3252 return true; 3253 } 3254 3255 /** 3256 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3257 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3258 */ 3259 private void setLockdownTracker(LockdownVpnTracker tracker) { 3260 // Shutdown any existing tracker 3261 final LockdownVpnTracker existing = mLockdownTracker; 3262 mLockdownTracker = null; 3263 if (existing != null) { 3264 existing.shutdown(); 3265 } 3266 3267 try { 3268 if (tracker != null) { 3269 mNetd.setFirewallEnabled(true); 3270 mNetd.setFirewallInterfaceRule("lo", true); 3271 mLockdownTracker = tracker; 3272 mLockdownTracker.init(); 3273 } else { 3274 mNetd.setFirewallEnabled(false); 3275 } 3276 } catch (RemoteException e) { 3277 // ignored; NMS lives inside system_server 3278 } 3279 } 3280 3281 private void throwIfLockdownEnabled() { 3282 if (mLockdownEnabled) { 3283 throw new IllegalStateException("Unavailable in lockdown mode"); 3284 } 3285 } 3286 3287 @Override 3288 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3289 // TODO: Remove? Any reason to trigger a provisioning check? 3290 return -1; 3291 } 3292 3293 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3294 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3295 3296 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3297 if (DBG) { 3298 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3299 + " action=" + action); 3300 } 3301 Intent intent = new Intent(action); 3302 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3303 // Concatenate the range of types onto the range of NetIDs. 3304 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3305 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3306 networkType, null, pendingIntent, false); 3307 } 3308 3309 /** 3310 * Show or hide network provisioning notifications. 3311 * 3312 * We use notifications for two purposes: to notify that a network requires sign in 3313 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3314 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3315 * particular network we can display the notification type that was most recently requested. 3316 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3317 * might first display NO_INTERNET, and then when the captive portal check completes, display 3318 * SIGN_IN. 3319 * 3320 * @param id an identifier that uniquely identifies this notification. This must match 3321 * between show and hide calls. We use the NetID value but for legacy callers 3322 * we concatenate the range of types with the range of NetIDs. 3323 */ 3324 private void setProvNotificationVisibleIntent(boolean visible, int id, 3325 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3326 boolean highPriority) { 3327 if (DBG) { 3328 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3329 + " networkType=" + getNetworkTypeName(networkType) 3330 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3331 } 3332 3333 Resources r = Resources.getSystem(); 3334 NotificationManager notificationManager = (NotificationManager) mContext 3335 .getSystemService(Context.NOTIFICATION_SERVICE); 3336 3337 if (visible) { 3338 CharSequence title; 3339 CharSequence details; 3340 int icon; 3341 if (notifyType == NotificationType.NO_INTERNET && 3342 networkType == ConnectivityManager.TYPE_WIFI) { 3343 title = r.getString(R.string.wifi_no_internet, 0); 3344 details = r.getString(R.string.wifi_no_internet_detailed); 3345 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3346 } else if (notifyType == NotificationType.SIGN_IN) { 3347 switch (networkType) { 3348 case ConnectivityManager.TYPE_WIFI: 3349 title = r.getString(R.string.wifi_available_sign_in, 0); 3350 details = r.getString(R.string.network_available_sign_in_detailed, 3351 extraInfo); 3352 icon = R.drawable.stat_notify_wifi_in_range; 3353 break; 3354 case ConnectivityManager.TYPE_MOBILE: 3355 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3356 title = r.getString(R.string.network_available_sign_in, 0); 3357 // TODO: Change this to pull from NetworkInfo once a printable 3358 // name has been added to it 3359 details = mTelephonyManager.getNetworkOperatorName(); 3360 icon = R.drawable.stat_notify_rssi_in_range; 3361 break; 3362 default: 3363 title = r.getString(R.string.network_available_sign_in, 0); 3364 details = r.getString(R.string.network_available_sign_in_detailed, 3365 extraInfo); 3366 icon = R.drawable.stat_notify_rssi_in_range; 3367 break; 3368 } 3369 } else { 3370 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3371 + getNetworkTypeName(networkType)); 3372 return; 3373 } 3374 3375 Notification notification = new Notification.Builder(mContext) 3376 .setWhen(0) 3377 .setSmallIcon(icon) 3378 .setAutoCancel(true) 3379 .setTicker(title) 3380 .setColor(mContext.getColor( 3381 com.android.internal.R.color.system_notification_accent_color)) 3382 .setContentTitle(title) 3383 .setContentText(details) 3384 .setContentIntent(intent) 3385 .setLocalOnly(true) 3386 .setPriority(highPriority ? 3387 Notification.PRIORITY_HIGH : 3388 Notification.PRIORITY_DEFAULT) 3389 .setDefaults(highPriority ? Notification.DEFAULT_ALL : 0) 3390 .setOnlyAlertOnce(true) 3391 .build(); 3392 3393 try { 3394 notificationManager.notify(NOTIFICATION_ID, id, notification); 3395 } catch (NullPointerException npe) { 3396 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3397 npe.printStackTrace(); 3398 } 3399 } else { 3400 try { 3401 notificationManager.cancel(NOTIFICATION_ID, id); 3402 } catch (NullPointerException npe) { 3403 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3404 npe.printStackTrace(); 3405 } 3406 } 3407 } 3408 3409 /** Location to an updatable file listing carrier provisioning urls. 3410 * An example: 3411 * 3412 * <?xml version="1.0" encoding="utf-8"?> 3413 * <provisioningUrls> 3414 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3415 * </provisioningUrls> 3416 */ 3417 private static final String PROVISIONING_URL_PATH = 3418 "/data/misc/radio/provisioning_urls.xml"; 3419 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3420 3421 /** XML tag for root element. */ 3422 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3423 /** XML tag for individual url */ 3424 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3425 /** XML attribute for mcc */ 3426 private static final String ATTR_MCC = "mcc"; 3427 /** XML attribute for mnc */ 3428 private static final String ATTR_MNC = "mnc"; 3429 3430 private String getProvisioningUrlBaseFromFile() { 3431 FileReader fileReader = null; 3432 XmlPullParser parser = null; 3433 Configuration config = mContext.getResources().getConfiguration(); 3434 3435 try { 3436 fileReader = new FileReader(mProvisioningUrlFile); 3437 parser = Xml.newPullParser(); 3438 parser.setInput(fileReader); 3439 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3440 3441 while (true) { 3442 XmlUtils.nextElement(parser); 3443 3444 String element = parser.getName(); 3445 if (element == null) break; 3446 3447 if (element.equals(TAG_PROVISIONING_URL)) { 3448 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3449 try { 3450 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3451 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3452 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3453 parser.next(); 3454 if (parser.getEventType() == XmlPullParser.TEXT) { 3455 return parser.getText(); 3456 } 3457 } 3458 } 3459 } catch (NumberFormatException e) { 3460 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3461 } 3462 } 3463 } 3464 return null; 3465 } catch (FileNotFoundException e) { 3466 loge("Carrier Provisioning Urls file not found"); 3467 } catch (XmlPullParserException e) { 3468 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3469 } catch (IOException e) { 3470 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3471 } finally { 3472 if (fileReader != null) { 3473 try { 3474 fileReader.close(); 3475 } catch (IOException e) {} 3476 } 3477 } 3478 return null; 3479 } 3480 3481 @Override 3482 public String getMobileProvisioningUrl() { 3483 enforceConnectivityInternalPermission(); 3484 String url = getProvisioningUrlBaseFromFile(); 3485 if (TextUtils.isEmpty(url)) { 3486 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3487 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3488 } else { 3489 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3490 } 3491 // populate the iccid, imei and phone number in the provisioning url. 3492 if (!TextUtils.isEmpty(url)) { 3493 String phoneNumber = mTelephonyManager.getLine1Number(); 3494 if (TextUtils.isEmpty(phoneNumber)) { 3495 phoneNumber = "0000000000"; 3496 } 3497 url = String.format(url, 3498 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3499 mTelephonyManager.getDeviceId() /* IMEI */, 3500 phoneNumber /* Phone numer */); 3501 } 3502 3503 return url; 3504 } 3505 3506 @Override 3507 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3508 String action) { 3509 enforceConnectivityInternalPermission(); 3510 final long ident = Binder.clearCallingIdentity(); 3511 try { 3512 setProvNotificationVisible(visible, networkType, action); 3513 } finally { 3514 Binder.restoreCallingIdentity(ident); 3515 } 3516 } 3517 3518 @Override 3519 public void setAirplaneMode(boolean enable) { 3520 enforceConnectivityInternalPermission(); 3521 final long ident = Binder.clearCallingIdentity(); 3522 try { 3523 final ContentResolver cr = mContext.getContentResolver(); 3524 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3525 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3526 intent.putExtra("state", enable); 3527 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3528 } finally { 3529 Binder.restoreCallingIdentity(ident); 3530 } 3531 } 3532 3533 private void onUserStart(int userId) { 3534 synchronized(mVpns) { 3535 Vpn userVpn = mVpns.get(userId); 3536 if (userVpn != null) { 3537 loge("Starting user already has a VPN"); 3538 return; 3539 } 3540 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3541 mVpns.put(userId, userVpn); 3542 } 3543 } 3544 3545 private void onUserStop(int userId) { 3546 synchronized(mVpns) { 3547 Vpn userVpn = mVpns.get(userId); 3548 if (userVpn == null) { 3549 loge("Stopping user has no VPN"); 3550 return; 3551 } 3552 mVpns.delete(userId); 3553 } 3554 } 3555 3556 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3557 @Override 3558 public void onReceive(Context context, Intent intent) { 3559 final String action = intent.getAction(); 3560 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3561 if (userId == UserHandle.USER_NULL) return; 3562 3563 if (Intent.ACTION_USER_STARTING.equals(action)) { 3564 onUserStart(userId); 3565 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3566 onUserStop(userId); 3567 } 3568 } 3569 }; 3570 3571 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3572 new HashMap<Messenger, NetworkFactoryInfo>(); 3573 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3574 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3575 3576 private static class NetworkFactoryInfo { 3577 public final String name; 3578 public final Messenger messenger; 3579 public final AsyncChannel asyncChannel; 3580 3581 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3582 this.name = name; 3583 this.messenger = messenger; 3584 this.asyncChannel = asyncChannel; 3585 } 3586 } 3587 3588 /** 3589 * Tracks info about the requester. 3590 * Also used to notice when the calling process dies so we can self-expire 3591 */ 3592 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3593 static final boolean REQUEST = true; 3594 static final boolean LISTEN = false; 3595 3596 final NetworkRequest request; 3597 final PendingIntent mPendingIntent; 3598 boolean mPendingIntentSent; 3599 private final IBinder mBinder; 3600 final int mPid; 3601 final int mUid; 3602 final Messenger messenger; 3603 final boolean isRequest; 3604 3605 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, boolean isRequest) { 3606 request = r; 3607 mPendingIntent = pi; 3608 messenger = null; 3609 mBinder = null; 3610 mPid = getCallingPid(); 3611 mUid = getCallingUid(); 3612 this.isRequest = isRequest; 3613 } 3614 3615 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, boolean isRequest) { 3616 super(); 3617 messenger = m; 3618 request = r; 3619 mBinder = binder; 3620 mPid = getCallingPid(); 3621 mUid = getCallingUid(); 3622 this.isRequest = isRequest; 3623 mPendingIntent = null; 3624 3625 try { 3626 mBinder.linkToDeath(this, 0); 3627 } catch (RemoteException e) { 3628 binderDied(); 3629 } 3630 } 3631 3632 void unlinkDeathRecipient() { 3633 if (mBinder != null) { 3634 mBinder.unlinkToDeath(this, 0); 3635 } 3636 } 3637 3638 public void binderDied() { 3639 log("ConnectivityService NetworkRequestInfo binderDied(" + 3640 request + ", " + mBinder + ")"); 3641 releaseNetworkRequest(request); 3642 } 3643 3644 public String toString() { 3645 return (isRequest ? "Request" : "Listen") + 3646 " from uid/pid:" + mUid + "/" + mPid + 3647 " for " + request + 3648 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3649 } 3650 } 3651 3652 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3653 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3654 if (badCapability != null) { 3655 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3656 } 3657 } 3658 3659 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3660 final SortedSet<Integer> thresholds = new TreeSet(); 3661 synchronized (nai) { 3662 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3663 if (nri.request.networkCapabilities.hasSignalStrength() && 3664 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3665 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3666 } 3667 } 3668 } 3669 return new ArrayList<Integer>(thresholds); 3670 } 3671 3672 private void updateSignalStrengthThresholds( 3673 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3674 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3675 Bundle thresholds = new Bundle(); 3676 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3677 3678 // TODO: Switch to VDBG. 3679 if (DBG) { 3680 String detail; 3681 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3682 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3683 } else { 3684 detail = reason; 3685 } 3686 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3687 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3688 } 3689 3690 nai.asyncChannel.sendMessage( 3691 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3692 0, 0, thresholds); 3693 } 3694 3695 @Override 3696 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3697 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3698 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3699 enforceNetworkRequestPermissions(networkCapabilities); 3700 enforceMeteredApnPolicy(networkCapabilities); 3701 ensureRequestableCapabilities(networkCapabilities); 3702 3703 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3704 throw new IllegalArgumentException("Bad timeout specified"); 3705 } 3706 3707 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 3708 .equals(networkCapabilities.getNetworkSpecifier())) { 3709 throw new IllegalArgumentException("Invalid network specifier - must not be '" 3710 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 3711 } 3712 3713 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3714 nextNetworkRequestId()); 3715 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3716 NetworkRequestInfo.REQUEST); 3717 if (DBG) log("requestNetwork for " + nri); 3718 3719 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3720 if (timeoutMs > 0) { 3721 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3722 nri), timeoutMs); 3723 } 3724 return networkRequest; 3725 } 3726 3727 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3728 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 3729 enforceConnectivityInternalPermission(); 3730 } else { 3731 enforceChangePermission(); 3732 } 3733 } 3734 3735 @Override 3736 public boolean requestBandwidthUpdate(Network network) { 3737 enforceAccessPermission(); 3738 NetworkAgentInfo nai = null; 3739 if (network == null) { 3740 return false; 3741 } 3742 synchronized (mNetworkForNetId) { 3743 nai = mNetworkForNetId.get(network.netId); 3744 } 3745 if (nai != null) { 3746 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3747 return true; 3748 } 3749 return false; 3750 } 3751 3752 3753 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3754 // if UID is restricted, don't allow them to bring up metered APNs 3755 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 3756 final int uidRules; 3757 final int uid = Binder.getCallingUid(); 3758 synchronized(mRulesLock) { 3759 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3760 } 3761 if (uidRules != RULE_ALLOW_ALL) { 3762 // we could silently fail or we can filter the available nets to only give 3763 // them those they have access to. Chose the more useful 3764 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 3765 } 3766 } 3767 } 3768 3769 @Override 3770 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3771 PendingIntent operation) { 3772 checkNotNull(operation, "PendingIntent cannot be null."); 3773 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3774 enforceNetworkRequestPermissions(networkCapabilities); 3775 enforceMeteredApnPolicy(networkCapabilities); 3776 ensureRequestableCapabilities(networkCapabilities); 3777 3778 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3779 nextNetworkRequestId()); 3780 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3781 NetworkRequestInfo.REQUEST); 3782 if (DBG) log("pendingRequest for " + nri); 3783 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3784 nri)); 3785 return networkRequest; 3786 } 3787 3788 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3789 mHandler.sendMessageDelayed( 3790 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3791 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3792 } 3793 3794 @Override 3795 public void releasePendingNetworkRequest(PendingIntent operation) { 3796 checkNotNull(operation, "PendingIntent cannot be null."); 3797 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3798 getCallingUid(), 0, operation)); 3799 } 3800 3801 // In order to implement the compatibility measure for pre-M apps that call 3802 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 3803 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 3804 // This ensures it has permission to do so. 3805 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 3806 if (nc == null) { 3807 return false; 3808 } 3809 int[] transportTypes = nc.getTransportTypes(); 3810 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 3811 return false; 3812 } 3813 try { 3814 mContext.enforceCallingOrSelfPermission( 3815 android.Manifest.permission.ACCESS_WIFI_STATE, 3816 "ConnectivityService"); 3817 } catch (SecurityException e) { 3818 return false; 3819 } 3820 return true; 3821 } 3822 3823 @Override 3824 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 3825 Messenger messenger, IBinder binder) { 3826 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3827 enforceAccessPermission(); 3828 } 3829 3830 NetworkRequest networkRequest = new NetworkRequest( 3831 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3832 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3833 NetworkRequestInfo.LISTEN); 3834 if (DBG) log("listenForNetwork for " + nri); 3835 3836 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3837 return networkRequest; 3838 } 3839 3840 @Override 3841 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 3842 PendingIntent operation) { 3843 checkNotNull(operation, "PendingIntent cannot be null."); 3844 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3845 enforceAccessPermission(); 3846 } 3847 3848 NetworkRequest networkRequest = new NetworkRequest( 3849 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3850 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3851 NetworkRequestInfo.LISTEN); 3852 if (DBG) log("pendingListenForNetwork for " + nri); 3853 3854 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3855 } 3856 3857 @Override 3858 public void releaseNetworkRequest(NetworkRequest networkRequest) { 3859 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 3860 0, networkRequest)); 3861 } 3862 3863 @Override 3864 public void registerNetworkFactory(Messenger messenger, String name) { 3865 enforceConnectivityInternalPermission(); 3866 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 3867 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 3868 } 3869 3870 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 3871 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 3872 mNetworkFactoryInfos.put(nfi.messenger, nfi); 3873 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 3874 } 3875 3876 @Override 3877 public void unregisterNetworkFactory(Messenger messenger) { 3878 enforceConnectivityInternalPermission(); 3879 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 3880 } 3881 3882 private void handleUnregisterNetworkFactory(Messenger messenger) { 3883 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 3884 if (nfi == null) { 3885 loge("Failed to find Messenger in unregisterNetworkFactory"); 3886 return; 3887 } 3888 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 3889 } 3890 3891 /** 3892 * NetworkAgentInfo supporting a request by requestId. 3893 * These have already been vetted (their Capabilities satisfy the request) 3894 * and the are the highest scored network available. 3895 * the are keyed off the Requests requestId. 3896 */ 3897 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 3898 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 3899 new SparseArray<NetworkAgentInfo>(); 3900 3901 // NOTE: Accessed on multiple threads, must be synchronized on itself. 3902 @GuardedBy("mNetworkForNetId") 3903 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 3904 new SparseArray<NetworkAgentInfo>(); 3905 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 3906 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 3907 // there may not be a strict 1:1 correlation between the two. 3908 @GuardedBy("mNetworkForNetId") 3909 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 3910 3911 // NetworkAgentInfo keyed off its connecting messenger 3912 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 3913 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 3914 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 3915 new HashMap<Messenger, NetworkAgentInfo>(); 3916 3917 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 3918 private final NetworkRequest mDefaultRequest; 3919 3920 // Request used to optionally keep mobile data active even when higher 3921 // priority networks like Wi-Fi are active. 3922 private final NetworkRequest mDefaultMobileDataRequest; 3923 3924 private NetworkAgentInfo getDefaultNetwork() { 3925 return mNetworkForRequestId.get(mDefaultRequest.requestId); 3926 } 3927 3928 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 3929 return nai == getDefaultNetwork(); 3930 } 3931 3932 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 3933 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 3934 int currentScore, NetworkMisc networkMisc) { 3935 enforceConnectivityInternalPermission(); 3936 3937 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 3938 // satisfies mDefaultRequest. 3939 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 3940 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 3941 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 3942 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 3943 synchronized (this) { 3944 nai.networkMonitor.systemReady = mSystemReady; 3945 } 3946 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network); 3947 if (DBG) log("registerNetworkAgent " + nai); 3948 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 3949 return nai.network.netId; 3950 } 3951 3952 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 3953 if (VDBG) log("Got NetworkAgent Messenger"); 3954 mNetworkAgentInfos.put(na.messenger, na); 3955 synchronized (mNetworkForNetId) { 3956 mNetworkForNetId.put(na.network.netId, na); 3957 } 3958 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 3959 NetworkInfo networkInfo = na.networkInfo; 3960 na.networkInfo = null; 3961 updateNetworkInfo(na, networkInfo); 3962 } 3963 3964 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 3965 LinkProperties newLp = networkAgent.linkProperties; 3966 int netId = networkAgent.network.netId; 3967 3968 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 3969 // we do anything else, make sure its LinkProperties are accurate. 3970 if (networkAgent.clatd != null) { 3971 networkAgent.clatd.fixupLinkProperties(oldLp); 3972 } 3973 if (networkAgent.apfFilter != null) { 3974 networkAgent.apfFilter.updateFilter(); 3975 } 3976 3977 updateInterfaces(newLp, oldLp, netId); 3978 updateMtu(newLp, oldLp); 3979 // TODO - figure out what to do for clat 3980// for (LinkProperties lp : newLp.getStackedLinks()) { 3981// updateMtu(lp, null); 3982// } 3983 updateTcpBufferSizes(networkAgent); 3984 3985 // TODO: deprecate and remove mDefaultDns when we can do so safely. See http://b/18327075 3986 // In L, we used it only when the network had Internet access but provided no DNS servers. 3987 // For now, just disable it, and if disabling it doesn't break things, remove it. 3988 // final boolean useDefaultDns = networkAgent.networkCapabilities.hasCapability( 3989 // NET_CAPABILITY_INTERNET); 3990 final boolean useDefaultDns = false; 3991 final boolean flushDns = updateRoutes(newLp, oldLp, netId); 3992 updateDnses(newLp, oldLp, netId, flushDns, useDefaultDns); 3993 3994 updateClat(newLp, oldLp, networkAgent); 3995 if (isDefaultNetwork(networkAgent)) { 3996 handleApplyDefaultProxy(newLp.getHttpProxy()); 3997 } else { 3998 updateProxy(newLp, oldLp, networkAgent); 3999 } 4000 // TODO - move this check to cover the whole function 4001 if (!Objects.equals(newLp, oldLp)) { 4002 notifyIfacesChanged(); 4003 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4004 } 4005 4006 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4007 } 4008 4009 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4010 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4011 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4012 4013 if (!wasRunningClat && shouldRunClat) { 4014 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4015 nai.clatd.start(); 4016 } else if (wasRunningClat && !shouldRunClat) { 4017 nai.clatd.stop(); 4018 } 4019 } 4020 4021 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4022 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4023 if (oldLp != null) { 4024 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4025 } else if (newLp != null) { 4026 interfaceDiff.added = newLp.getAllInterfaceNames(); 4027 } 4028 for (String iface : interfaceDiff.added) { 4029 try { 4030 if (DBG) log("Adding iface " + iface + " to network " + netId); 4031 mNetd.addInterfaceToNetwork(iface, netId); 4032 } catch (Exception e) { 4033 loge("Exception adding interface: " + e); 4034 } 4035 } 4036 for (String iface : interfaceDiff.removed) { 4037 try { 4038 if (DBG) log("Removing iface " + iface + " from network " + netId); 4039 mNetd.removeInterfaceFromNetwork(iface, netId); 4040 } catch (Exception e) { 4041 loge("Exception removing interface: " + e); 4042 } 4043 } 4044 } 4045 4046 /** 4047 * Have netd update routes from oldLp to newLp. 4048 * @return true if routes changed between oldLp and newLp 4049 */ 4050 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4051 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4052 if (oldLp != null) { 4053 routeDiff = oldLp.compareAllRoutes(newLp); 4054 } else if (newLp != null) { 4055 routeDiff.added = newLp.getAllRoutes(); 4056 } 4057 4058 // add routes before removing old in case it helps with continuous connectivity 4059 4060 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4061 for (RouteInfo route : routeDiff.added) { 4062 if (route.hasGateway()) continue; 4063 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4064 try { 4065 mNetd.addRoute(netId, route); 4066 } catch (Exception e) { 4067 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4068 loge("Exception in addRoute for non-gateway: " + e); 4069 } 4070 } 4071 } 4072 for (RouteInfo route : routeDiff.added) { 4073 if (route.hasGateway() == false) continue; 4074 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4075 try { 4076 mNetd.addRoute(netId, route); 4077 } catch (Exception e) { 4078 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4079 loge("Exception in addRoute for gateway: " + e); 4080 } 4081 } 4082 } 4083 4084 for (RouteInfo route : routeDiff.removed) { 4085 if (DBG) log("Removing Route [" + route + "] from network " + netId); 4086 try { 4087 mNetd.removeRoute(netId, route); 4088 } catch (Exception e) { 4089 loge("Exception in removeRoute: " + e); 4090 } 4091 } 4092 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4093 } 4094 4095 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId, 4096 boolean flush, boolean useDefaultDns) { 4097 if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) { 4098 Collection<InetAddress> dnses = newLp.getDnsServers(); 4099 if (dnses.size() == 0 && mDefaultDns != null && useDefaultDns) { 4100 dnses = new ArrayList(); 4101 dnses.add(mDefaultDns); 4102 if (DBG) { 4103 loge("no dns provided for netId " + netId + ", so using defaults"); 4104 } 4105 } 4106 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 4107 try { 4108 mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses), 4109 newLp.getDomains()); 4110 } catch (Exception e) { 4111 loge("Exception in setDnsServersForNetwork: " + e); 4112 } 4113 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4114 if (defaultNai != null && defaultNai.network.netId == netId) { 4115 setDefaultDnsSystemProperties(dnses); 4116 } 4117 flushVmDnsCache(); 4118 } else if (flush) { 4119 try { 4120 mNetd.flushNetworkDnsCache(netId); 4121 } catch (Exception e) { 4122 loge("Exception in flushNetworkDnsCache: " + e); 4123 } 4124 flushVmDnsCache(); 4125 } 4126 } 4127 4128 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4129 int last = 0; 4130 for (InetAddress dns : dnses) { 4131 ++last; 4132 String key = "net.dns" + last; 4133 String value = dns.getHostAddress(); 4134 SystemProperties.set(key, value); 4135 } 4136 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4137 String key = "net.dns" + i; 4138 SystemProperties.set(key, ""); 4139 } 4140 mNumDnsEntries = last; 4141 } 4142 4143 /** 4144 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4145 * augmented with any stateful capabilities implied from {@code networkAgent} 4146 * (e.g., validated status and captive portal status). 4147 * 4148 * @param nai the network having its capabilities updated. 4149 * @param networkCapabilities the new network capabilities. 4150 */ 4151 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4152 // Don't modify caller's NetworkCapabilities. 4153 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4154 if (nai.lastValidated) { 4155 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4156 } else { 4157 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4158 } 4159 if (nai.lastCaptivePortalDetected) { 4160 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4161 } else { 4162 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4163 } 4164 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4165 final int oldScore = nai.getCurrentScore(); 4166 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4167 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4168 try { 4169 mNetd.setNetworkPermission(nai.network.netId, 4170 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4171 null : NetworkManagementService.PERMISSION_SYSTEM); 4172 } catch (RemoteException e) { 4173 loge("Exception in setNetworkPermission: " + e); 4174 } 4175 } 4176 synchronized (nai) { 4177 nai.networkCapabilities = networkCapabilities; 4178 } 4179 rematchAllNetworksAndRequests(nai, oldScore); 4180 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4181 } 4182 } 4183 4184 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4185 for (int i = 0; i < nai.networkRequests.size(); i++) { 4186 NetworkRequest nr = nai.networkRequests.valueAt(i); 4187 // Don't send listening requests to factories. b/17393458 4188 if (!isRequest(nr)) continue; 4189 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4190 } 4191 } 4192 4193 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4194 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4195 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4196 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4197 networkRequest); 4198 } 4199 } 4200 4201 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4202 int notificationType) { 4203 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4204 Intent intent = new Intent(); 4205 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4206 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4207 nri.mPendingIntentSent = true; 4208 sendIntent(nri.mPendingIntent, intent); 4209 } 4210 // else not handled 4211 } 4212 4213 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4214 mPendingIntentWakeLock.acquire(); 4215 try { 4216 if (DBG) log("Sending " + pendingIntent); 4217 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4218 } catch (PendingIntent.CanceledException e) { 4219 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4220 mPendingIntentWakeLock.release(); 4221 releasePendingNetworkRequest(pendingIntent); 4222 } 4223 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4224 } 4225 4226 @Override 4227 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4228 String resultData, Bundle resultExtras) { 4229 if (DBG) log("Finished sending " + pendingIntent); 4230 mPendingIntentWakeLock.release(); 4231 // Release with a delay so the receiving client has an opportunity to put in its 4232 // own request. 4233 releasePendingNetworkRequestWithDelay(pendingIntent); 4234 } 4235 4236 private void callCallbackForRequest(NetworkRequestInfo nri, 4237 NetworkAgentInfo networkAgent, int notificationType) { 4238 if (nri.messenger == null) return; // Default request has no msgr 4239 Bundle bundle = new Bundle(); 4240 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4241 new NetworkRequest(nri.request)); 4242 Message msg = Message.obtain(); 4243 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4244 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4245 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4246 } 4247 switch (notificationType) { 4248 case ConnectivityManager.CALLBACK_LOSING: { 4249 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4250 break; 4251 } 4252 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4253 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4254 new NetworkCapabilities(networkAgent.networkCapabilities)); 4255 break; 4256 } 4257 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4258 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4259 new LinkProperties(networkAgent.linkProperties)); 4260 break; 4261 } 4262 } 4263 msg.what = notificationType; 4264 msg.setData(bundle); 4265 try { 4266 if (VDBG) { 4267 log("sending notification " + notifyTypeToName(notificationType) + 4268 " for " + nri.request); 4269 } 4270 nri.messenger.send(msg); 4271 } catch (RemoteException e) { 4272 // may occur naturally in the race of binder death. 4273 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4274 } 4275 } 4276 4277 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4278 for (int i = 0; i < nai.networkRequests.size(); i++) { 4279 NetworkRequest nr = nai.networkRequests.valueAt(i); 4280 // Ignore listening requests. 4281 if (!isRequest(nr)) continue; 4282 loge("Dead network still had at least " + nr); 4283 break; 4284 } 4285 nai.asyncChannel.disconnect(); 4286 } 4287 4288 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4289 if (oldNetwork == null) { 4290 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4291 return; 4292 } 4293 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4294 teardownUnneededNetwork(oldNetwork); 4295 } 4296 4297 private void makeDefault(NetworkAgentInfo newNetwork) { 4298 if (DBG) log("Switching to new default network: " + newNetwork); 4299 setupDataActivityTracking(newNetwork); 4300 try { 4301 mNetd.setDefaultNetId(newNetwork.network.netId); 4302 } catch (Exception e) { 4303 loge("Exception setting default network :" + e); 4304 } 4305 notifyLockdownVpn(newNetwork); 4306 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4307 updateTcpBufferSizes(newNetwork); 4308 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4309 } 4310 4311 // Handles a network appearing or improving its score. 4312 // 4313 // - Evaluates all current NetworkRequests that can be 4314 // satisfied by newNetwork, and reassigns to newNetwork 4315 // any such requests for which newNetwork is the best. 4316 // 4317 // - Lingers any validated Networks that as a result are no longer 4318 // needed. A network is needed if it is the best network for 4319 // one or more NetworkRequests, or if it is a VPN. 4320 // 4321 // - Tears down newNetwork if it just became validated 4322 // but turns out to be unneeded. 4323 // 4324 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4325 // networks that have no chance (i.e. even if validated) 4326 // of becoming the highest scoring network. 4327 // 4328 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4329 // it does not remove NetworkRequests that other Networks could better satisfy. 4330 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4331 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4332 // as it performs better by a factor of the number of Networks. 4333 // 4334 // @param newNetwork is the network to be matched against NetworkRequests. 4335 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4336 // performed to tear down unvalidated networks that have no chance (i.e. even if 4337 // validated) of becoming the highest scoring network. 4338 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4339 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4340 if (!newNetwork.created) return; 4341 boolean keep = newNetwork.isVPN(); 4342 boolean isNewDefault = false; 4343 NetworkAgentInfo oldDefaultNetwork = null; 4344 if (VDBG) log("rematching " + newNetwork.name()); 4345 // Find and migrate to this Network any NetworkRequests for 4346 // which this network is now the best. 4347 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4348 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4349 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4350 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4351 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4352 final boolean satisfies = newNetwork.satisfies(nri.request); 4353 if (newNetwork == currentNetwork && satisfies) { 4354 if (VDBG) { 4355 log("Network " + newNetwork.name() + " was already satisfying" + 4356 " request " + nri.request.requestId + ". No change."); 4357 } 4358 keep = true; 4359 continue; 4360 } 4361 4362 // check if it satisfies the NetworkCapabilities 4363 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4364 if (satisfies) { 4365 if (!nri.isRequest) { 4366 // This is not a request, it's a callback listener. 4367 // Add it to newNetwork regardless of score. 4368 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4369 continue; 4370 } 4371 4372 // next check if it's better than any current network we're using for 4373 // this request 4374 if (VDBG) { 4375 log("currentScore = " + 4376 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4377 ", newScore = " + newNetwork.getCurrentScore()); 4378 } 4379 if (currentNetwork == null || 4380 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4381 if (DBG) log("rematch for " + newNetwork.name()); 4382 if (currentNetwork != null) { 4383 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4384 currentNetwork.networkRequests.remove(nri.request.requestId); 4385 currentNetwork.networkLingered.add(nri.request); 4386 affectedNetworks.add(currentNetwork); 4387 } else { 4388 if (DBG) log(" accepting network in place of null"); 4389 } 4390 unlinger(newNetwork); 4391 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4392 if (!newNetwork.addRequest(nri.request)) { 4393 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4394 } 4395 addedRequests.add(nri); 4396 keep = true; 4397 // Tell NetworkFactories about the new score, so they can stop 4398 // trying to connect if they know they cannot match it. 4399 // TODO - this could get expensive if we have alot of requests for this 4400 // network. Think about if there is a way to reduce this. Push 4401 // netid->request mapping to each factory? 4402 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4403 if (mDefaultRequest.requestId == nri.request.requestId) { 4404 isNewDefault = true; 4405 oldDefaultNetwork = currentNetwork; 4406 } 4407 } 4408 } else if (newNetwork.networkRequests.get(nri.request.requestId) != null) { 4409 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4410 // mark it as no longer satisfying "nri". Because networks are processed by 4411 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4412 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4413 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4414 // This means this code doesn't have to handle the case where "currentNetwork" no 4415 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4416 if (DBG) { 4417 log("Network " + newNetwork.name() + " stopped satisfying" + 4418 " request " + nri.request.requestId); 4419 } 4420 newNetwork.networkRequests.remove(nri.request.requestId); 4421 if (currentNetwork == newNetwork) { 4422 mNetworkForRequestId.remove(nri.request.requestId); 4423 sendUpdatedScoreToFactories(nri.request, 0); 4424 } else { 4425 if (nri.isRequest == true) { 4426 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4427 newNetwork.name() + 4428 " without updating mNetworkForRequestId or factories!"); 4429 } 4430 } 4431 // TODO: technically, sending CALLBACK_LOST here is 4432 // incorrect if nri is a request (not a listen) and there 4433 // is a replacement network currently connected that can 4434 // satisfy it. However, the only capability that can both 4435 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4436 // so this code is only incorrect for a network that loses 4437 // the TRUSTED capability, which is a rare case. 4438 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST); 4439 } 4440 } 4441 // Linger any networks that are no longer needed. 4442 for (NetworkAgentInfo nai : affectedNetworks) { 4443 if (nai.lingering) { 4444 // Already lingered. Nothing to do. This can only happen if "nai" is in 4445 // "affectedNetworks" twice. The reasoning being that to get added to 4446 // "affectedNetworks", "nai" must have been satisfying a NetworkRequest 4447 // (i.e. not lingered) so it could have only been lingered by this loop. 4448 // unneeded(nai) will be false and we'll call unlinger() below which would 4449 // be bad, so handle it here. 4450 } else if (unneeded(nai)) { 4451 linger(nai); 4452 } else { 4453 // Clear nai.networkLingered we might have added above. 4454 unlinger(nai); 4455 } 4456 } 4457 if (isNewDefault) { 4458 // Notify system services that this network is up. 4459 makeDefault(newNetwork); 4460 synchronized (ConnectivityService.this) { 4461 // have a new default network, release the transition wakelock in 4462 // a second if it's held. The second pause is to allow apps 4463 // to reconnect over the new network 4464 if (mNetTransitionWakeLock.isHeld()) { 4465 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4466 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4467 mNetTransitionWakeLockSerialNumber, 0), 4468 1000); 4469 } 4470 } 4471 } 4472 4473 // do this after the default net is switched, but 4474 // before LegacyTypeTracker sends legacy broadcasts 4475 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4476 4477 if (isNewDefault) { 4478 // Maintain the illusion: since the legacy API only 4479 // understands one network at a time, we must pretend 4480 // that the current default network disconnected before 4481 // the new one connected. 4482 if (oldDefaultNetwork != null) { 4483 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4484 oldDefaultNetwork, true); 4485 } 4486 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4487 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4488 notifyLockdownVpn(newNetwork); 4489 } 4490 4491 if (keep) { 4492 // Notify battery stats service about this network, both the normal 4493 // interface and any stacked links. 4494 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4495 try { 4496 final IBatteryStats bs = BatteryStatsService.getService(); 4497 final int type = newNetwork.networkInfo.getType(); 4498 4499 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4500 bs.noteNetworkInterfaceType(baseIface, type); 4501 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4502 final String stackedIface = stacked.getInterfaceName(); 4503 bs.noteNetworkInterfaceType(stackedIface, type); 4504 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4505 } 4506 } catch (RemoteException ignored) { 4507 } 4508 4509 // This has to happen after the notifyNetworkCallbacks as that tickles each 4510 // ConnectivityManager instance so that legacy requests correctly bind dns 4511 // requests to this network. The legacy users are listening for this bcast 4512 // and will generally do a dns request so they can ensureRouteToHost and if 4513 // they do that before the callbacks happen they'll use the default network. 4514 // 4515 // TODO: Is there still a race here? We send the broadcast 4516 // after sending the callback, but if the app can receive the 4517 // broadcast before the callback, it might still break. 4518 // 4519 // This *does* introduce a race where if the user uses the new api 4520 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4521 // they may get old info. Reverse this after the old startUsing api is removed. 4522 // This is on top of the multiple intent sequencing referenced in the todo above. 4523 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4524 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4525 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4526 // legacy type tracker filters out repeat adds 4527 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4528 } 4529 } 4530 4531 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4532 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4533 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4534 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4535 if (newNetwork.isVPN()) { 4536 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4537 } 4538 } 4539 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4540 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4541 if (unneeded(nai)) { 4542 if (DBG) log("Reaping " + nai.name()); 4543 teardownUnneededNetwork(nai); 4544 } 4545 } 4546 } 4547 } 4548 4549 /** 4550 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4551 * being disconnected. 4552 * @param changed If only one Network's score or capabilities have been modified since the last 4553 * time this function was called, pass this Network in this argument, otherwise pass 4554 * null. 4555 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4556 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4557 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4558 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4559 * network's score. 4560 */ 4561 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4562 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4563 // to avoid the slowness. It is not simply enough to process just "changed", for 4564 // example in the case where "changed"'s score decreases and another network should begin 4565 // satifying a NetworkRequest that "changed" currently satisfies. 4566 4567 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4568 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4569 // rematchNetworkAndRequests() handles. 4570 if (changed != null && oldScore < changed.getCurrentScore()) { 4571 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP); 4572 } else { 4573 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4574 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4575 // Rematch higher scoring networks first to prevent requests first matching a lower 4576 // scoring network and then a higher scoring network, which could produce multiple 4577 // callbacks and inadvertently unlinger networks. 4578 Arrays.sort(nais); 4579 for (NetworkAgentInfo nai : nais) { 4580 rematchNetworkAndRequests(nai, 4581 // Only reap the last time through the loop. Reaping before all rematching 4582 // is complete could incorrectly teardown a network that hasn't yet been 4583 // rematched. 4584 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4585 : ReapUnvalidatedNetworks.REAP); 4586 } 4587 } 4588 } 4589 4590 private void updateInetCondition(NetworkAgentInfo nai) { 4591 // Don't bother updating until we've graduated to validated at least once. 4592 if (!nai.everValidated) return; 4593 // For now only update icons for default connection. 4594 // TODO: Update WiFi and cellular icons separately. b/17237507 4595 if (!isDefaultNetwork(nai)) return; 4596 4597 int newInetCondition = nai.lastValidated ? 100 : 0; 4598 // Don't repeat publish. 4599 if (newInetCondition == mDefaultInetConditionPublished) return; 4600 4601 mDefaultInetConditionPublished = newInetCondition; 4602 sendInetConditionBroadcast(nai.networkInfo); 4603 } 4604 4605 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4606 if (mLockdownTracker != null) { 4607 if (nai != null && nai.isVPN()) { 4608 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4609 } else { 4610 mLockdownTracker.onNetworkInfoChanged(); 4611 } 4612 } 4613 } 4614 4615 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4616 NetworkInfo.State state = newInfo.getState(); 4617 NetworkInfo oldInfo = null; 4618 final int oldScore = networkAgent.getCurrentScore(); 4619 synchronized (networkAgent) { 4620 oldInfo = networkAgent.networkInfo; 4621 networkAgent.networkInfo = newInfo; 4622 } 4623 notifyLockdownVpn(networkAgent); 4624 4625 if (oldInfo != null && oldInfo.getState() == state) { 4626 if (VDBG) log("ignoring duplicate network state non-change"); 4627 return; 4628 } 4629 if (DBG) { 4630 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4631 (oldInfo == null ? "null" : oldInfo.getState()) + 4632 " to " + state); 4633 } 4634 4635 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4636 try { 4637 // This should never fail. Specifying an already in use NetID will cause failure. 4638 if (networkAgent.isVPN()) { 4639 mNetd.createVirtualNetwork(networkAgent.network.netId, 4640 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4641 (networkAgent.networkMisc == null || 4642 !networkAgent.networkMisc.allowBypass)); 4643 } else { 4644 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4645 networkAgent.networkCapabilities.hasCapability( 4646 NET_CAPABILITY_NOT_RESTRICTED) ? 4647 null : NetworkManagementService.PERMISSION_SYSTEM); 4648 } 4649 } catch (Exception e) { 4650 loge("Error creating network " + networkAgent.network.netId + ": " 4651 + e.getMessage()); 4652 return; 4653 } 4654 networkAgent.created = true; 4655 updateLinkProperties(networkAgent, null); 4656 notifyIfacesChanged(); 4657 4658 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4659 scheduleUnvalidatedPrompt(networkAgent); 4660 4661 if (networkAgent.isVPN()) { 4662 // Temporarily disable the default proxy (not global). 4663 synchronized (mProxyLock) { 4664 if (!mDefaultProxyDisabled) { 4665 mDefaultProxyDisabled = true; 4666 if (mGlobalProxy == null && mDefaultProxy != null) { 4667 sendProxyBroadcast(null); 4668 } 4669 } 4670 } 4671 // TODO: support proxy per network. 4672 } 4673 4674 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 4675 // be communicated to a particular NetworkAgent depends only on the network's immutable, 4676 // capabilities, so it only needs to be done once on initial connect, not every time the 4677 // network's capabilities change. Note that we do this before rematching the network, 4678 // so we could decide to tear it down immediately afterwards. That's fine though - on 4679 // disconnection NetworkAgents should stop any signal strength monitoring they have been 4680 // doing. 4681 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 4682 4683 // Consider network even though it is not yet validated. 4684 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP); 4685 4686 // This has to happen after matching the requests, because callbacks are just requests. 4687 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4688 } else if (state == NetworkInfo.State.DISCONNECTED) { 4689 networkAgent.asyncChannel.disconnect(); 4690 if (networkAgent.isVPN()) { 4691 synchronized (mProxyLock) { 4692 if (mDefaultProxyDisabled) { 4693 mDefaultProxyDisabled = false; 4694 if (mGlobalProxy == null && mDefaultProxy != null) { 4695 sendProxyBroadcast(mDefaultProxy); 4696 } 4697 } 4698 } 4699 } 4700 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 4701 state == NetworkInfo.State.SUSPENDED) { 4702 // going into or coming out of SUSPEND: rescore and notify 4703 if (networkAgent.getCurrentScore() != oldScore) { 4704 rematchAllNetworksAndRequests(networkAgent, oldScore); 4705 } 4706 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 4707 ConnectivityManager.CALLBACK_SUSPENDED : 4708 ConnectivityManager.CALLBACK_RESUMED)); 4709 mLegacyTypeTracker.update(networkAgent); 4710 } 4711 } 4712 4713 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4714 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4715 if (score < 0) { 4716 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4717 "). Bumping score to min of 0"); 4718 score = 0; 4719 } 4720 4721 final int oldScore = nai.getCurrentScore(); 4722 nai.setCurrentScore(score); 4723 4724 rematchAllNetworksAndRequests(nai, oldScore); 4725 4726 sendUpdatedScoreToFactories(nai); 4727 } 4728 4729 // notify only this one new request of the current state 4730 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4731 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4732 // TODO - read state from monitor to decide what to send. 4733// if (nai.networkMonitor.isLingering()) { 4734// notifyType = NetworkCallbacks.LOSING; 4735// } else if (nai.networkMonitor.isEvaluating()) { 4736// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4737// } 4738 if (nri.mPendingIntent == null) { 4739 callCallbackForRequest(nri, nai, notifyType); 4740 } else { 4741 sendPendingIntentForRequest(nri, nai, notifyType); 4742 } 4743 } 4744 4745 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 4746 // The NetworkInfo we actually send out has no bearing on the real 4747 // state of affairs. For example, if the default connection is mobile, 4748 // and a request for HIPRI has just gone away, we need to pretend that 4749 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4750 // the state to DISCONNECTED, even though the network is of type MOBILE 4751 // and is still connected. 4752 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4753 info.setType(type); 4754 if (state != DetailedState.DISCONNECTED) { 4755 info.setDetailedState(state, null, info.getExtraInfo()); 4756 sendConnectedBroadcast(info); 4757 } else { 4758 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 4759 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4760 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4761 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4762 if (info.isFailover()) { 4763 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4764 nai.networkInfo.setFailover(false); 4765 } 4766 if (info.getReason() != null) { 4767 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4768 } 4769 if (info.getExtraInfo() != null) { 4770 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4771 } 4772 NetworkAgentInfo newDefaultAgent = null; 4773 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4774 newDefaultAgent = getDefaultNetwork(); 4775 if (newDefaultAgent != null) { 4776 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4777 newDefaultAgent.networkInfo); 4778 } else { 4779 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4780 } 4781 } 4782 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4783 mDefaultInetConditionPublished); 4784 sendStickyBroadcast(intent); 4785 if (newDefaultAgent != null) { 4786 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4787 } 4788 } 4789 } 4790 4791 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4792 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4793 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4794 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4795 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4796 if (VDBG) log(" sending notification for " + nr); 4797 if (nri.mPendingIntent == null) { 4798 callCallbackForRequest(nri, networkAgent, notifyType); 4799 } else { 4800 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4801 } 4802 } 4803 } 4804 4805 private String notifyTypeToName(int notifyType) { 4806 switch (notifyType) { 4807 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4808 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4809 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4810 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4811 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4812 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4813 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4814 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4815 } 4816 return "UNKNOWN"; 4817 } 4818 4819 /** 4820 * Notify other system services that set of active ifaces has changed. 4821 */ 4822 private void notifyIfacesChanged() { 4823 try { 4824 mStatsService.forceUpdateIfaces(); 4825 } catch (Exception ignored) { 4826 } 4827 } 4828 4829 @Override 4830 public boolean addVpnAddress(String address, int prefixLength) { 4831 throwIfLockdownEnabled(); 4832 int user = UserHandle.getUserId(Binder.getCallingUid()); 4833 synchronized (mVpns) { 4834 return mVpns.get(user).addAddress(address, prefixLength); 4835 } 4836 } 4837 4838 @Override 4839 public boolean removeVpnAddress(String address, int prefixLength) { 4840 throwIfLockdownEnabled(); 4841 int user = UserHandle.getUserId(Binder.getCallingUid()); 4842 synchronized (mVpns) { 4843 return mVpns.get(user).removeAddress(address, prefixLength); 4844 } 4845 } 4846 4847 @Override 4848 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 4849 throwIfLockdownEnabled(); 4850 int user = UserHandle.getUserId(Binder.getCallingUid()); 4851 boolean success; 4852 synchronized (mVpns) { 4853 success = mVpns.get(user).setUnderlyingNetworks(networks); 4854 } 4855 if (success) { 4856 notifyIfacesChanged(); 4857 } 4858 return success; 4859 } 4860 4861 @Override 4862 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 4863 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 4864 enforceKeepalivePermission(); 4865 mKeepaliveTracker.startNattKeepalive( 4866 getNetworkAgentInfoForNetwork(network), 4867 intervalSeconds, messenger, binder, 4868 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 4869 } 4870 4871 @Override 4872 public void stopKeepalive(Network network, int slot) { 4873 mHandler.sendMessage(mHandler.obtainMessage( 4874 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 4875 } 4876 4877 @Override 4878 public void factoryReset() { 4879 enforceConnectivityInternalPermission(); 4880 4881 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 4882 return; 4883 } 4884 4885 final int userId = UserHandle.getCallingUserId(); 4886 4887 // Turn airplane mode off 4888 setAirplaneMode(false); 4889 4890 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 4891 // Untether 4892 for (String tether : getTetheredIfaces()) { 4893 untether(tether); 4894 } 4895 } 4896 4897 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 4898 // Turn VPN off 4899 VpnConfig vpnConfig = getVpnConfig(userId); 4900 if (vpnConfig != null) { 4901 if (vpnConfig.legacy) { 4902 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 4903 } else { 4904 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 4905 // in the future without user intervention. 4906 setVpnPackageAuthorization(vpnConfig.user, userId, false); 4907 4908 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN, userId); 4909 } 4910 } 4911 } 4912 } 4913 4914 @VisibleForTesting 4915 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 4916 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 4917 return new NetworkMonitor(context, handler, nai, defaultRequest); 4918 } 4919 4920} 4921