ConnectivityService.java revision a9ebeeff038ae5064dd36418ebfc07796ef58769
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 31import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 32import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 33import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 34 35import android.annotation.Nullable; 36import android.app.AlarmManager; 37import android.app.Notification; 38import android.app.NotificationManager; 39import android.app.PendingIntent; 40import android.content.BroadcastReceiver; 41import android.content.ContentResolver; 42import android.content.Context; 43import android.content.Intent; 44import android.content.IntentFilter; 45import android.content.pm.PackageManager; 46import android.content.res.Configuration; 47import android.content.res.Resources; 48import android.database.ContentObserver; 49import android.net.ConnectivityManager; 50import android.net.ConnectivityManager.PacketKeepalive; 51import android.net.IConnectivityManager; 52import android.net.INetworkManagementEventObserver; 53import android.net.INetworkPolicyListener; 54import android.net.INetworkPolicyManager; 55import android.net.INetworkStatsService; 56import android.net.LinkProperties; 57import android.net.LinkProperties.CompareResult; 58import android.net.Network; 59import android.net.NetworkAgent; 60import android.net.NetworkCapabilities; 61import android.net.NetworkConfig; 62import android.net.NetworkInfo; 63import android.net.NetworkInfo.DetailedState; 64import android.net.NetworkMisc; 65import android.net.NetworkQuotaInfo; 66import android.net.NetworkRequest; 67import android.net.NetworkState; 68import android.net.NetworkUtils; 69import android.net.Proxy; 70import android.net.ProxyInfo; 71import android.net.RouteInfo; 72import android.net.UidRange; 73import android.net.Uri; 74import android.os.Binder; 75import android.os.Bundle; 76import android.os.FileUtils; 77import android.os.Handler; 78import android.os.HandlerThread; 79import android.os.IBinder; 80import android.os.INetworkManagementService; 81import android.os.Looper; 82import android.os.Message; 83import android.os.Messenger; 84import android.os.ParcelFileDescriptor; 85import android.os.PowerManager; 86import android.os.Process; 87import android.os.RemoteException; 88import android.os.SystemClock; 89import android.os.SystemProperties; 90import android.os.UserHandle; 91import android.os.UserManager; 92import android.provider.Settings; 93import android.security.Credentials; 94import android.security.KeyStore; 95import android.telephony.TelephonyManager; 96import android.text.TextUtils; 97import android.util.LocalLog; 98import android.util.LocalLog.ReadOnlyLocalLog; 99import android.util.Pair; 100import android.util.Slog; 101import android.util.SparseArray; 102import android.util.SparseBooleanArray; 103import android.util.SparseIntArray; 104import android.util.Xml; 105 106import com.android.internal.R; 107import com.android.internal.annotations.GuardedBy; 108import com.android.internal.annotations.VisibleForTesting; 109import com.android.internal.app.IBatteryStats; 110import com.android.internal.net.LegacyVpnInfo; 111import com.android.internal.net.NetworkStatsFactory; 112import com.android.internal.net.VpnConfig; 113import com.android.internal.net.VpnInfo; 114import com.android.internal.net.VpnProfile; 115import com.android.internal.telephony.DctConstants; 116import com.android.internal.util.AsyncChannel; 117import com.android.internal.util.IndentingPrintWriter; 118import com.android.internal.util.XmlUtils; 119import com.android.server.am.BatteryStatsService; 120import com.android.server.connectivity.DataConnectionStats; 121import com.android.server.connectivity.KeepaliveTracker; 122import com.android.server.connectivity.NetworkDiagnostics; 123import com.android.server.connectivity.Nat464Xlat; 124import com.android.server.connectivity.NetworkAgentInfo; 125import com.android.server.connectivity.NetworkMonitor; 126import com.android.server.connectivity.PacManager; 127import com.android.server.connectivity.PermissionMonitor; 128import com.android.server.connectivity.Tethering; 129import com.android.server.connectivity.Vpn; 130import com.android.server.net.BaseNetworkObserver; 131import com.android.server.net.LockdownVpnTracker; 132import com.google.android.collect.Lists; 133import com.google.android.collect.Sets; 134 135import org.xmlpull.v1.XmlPullParser; 136import org.xmlpull.v1.XmlPullParserException; 137 138import java.io.File; 139import java.io.FileDescriptor; 140import java.io.FileNotFoundException; 141import java.io.FileReader; 142import java.io.IOException; 143import java.io.PrintWriter; 144import java.net.Inet4Address; 145import java.net.InetAddress; 146import java.net.UnknownHostException; 147import java.util.ArrayDeque; 148import java.util.ArrayList; 149import java.util.Arrays; 150import java.util.Collection; 151import java.util.HashMap; 152import java.util.HashSet; 153import java.util.SortedSet; 154import java.util.TreeSet; 155import java.util.Iterator; 156import java.util.List; 157import java.util.Map; 158import java.util.Objects; 159import java.util.concurrent.atomic.AtomicInteger; 160 161/** 162 * @hide 163 */ 164public class ConnectivityService extends IConnectivityManager.Stub 165 implements PendingIntent.OnFinished { 166 private static final String TAG = "ConnectivityService"; 167 168 private static final boolean DBG = true; 169 private static final boolean VDBG = false; 170 171 private static final boolean LOGD_RULES = false; 172 173 // TODO: create better separation between radio types and network types 174 175 // how long to wait before switching back to a radio's default network 176 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 177 // system property that can override the above value 178 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 179 "android.telephony.apn-restore"; 180 181 // How long to wait before putting up a "This network doesn't have an Internet connection, 182 // connect anyway?" dialog after the user selects a network that doesn't validate. 183 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 184 185 // How long to delay to removal of a pending intent based request. 186 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 187 private final int mReleasePendingIntentDelayMs; 188 189 private Tethering mTethering; 190 191 private final PermissionMonitor mPermissionMonitor; 192 193 private KeyStore mKeyStore; 194 195 @GuardedBy("mVpns") 196 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 197 198 private boolean mLockdownEnabled; 199 private LockdownVpnTracker mLockdownTracker; 200 201 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 202 private Object mRulesLock = new Object(); 203 /** Currently active network rules by UID. */ 204 private SparseIntArray mUidRules = new SparseIntArray(); 205 /** Set of ifaces that are costly. */ 206 private HashSet<String> mMeteredIfaces = Sets.newHashSet(); 207 208 final private Context mContext; 209 private int mNetworkPreference; 210 // 0 is full bad, 100 is full good 211 private int mDefaultInetConditionPublished = 0; 212 213 private int mNumDnsEntries; 214 215 private boolean mTestMode; 216 private static ConnectivityService sServiceInstance; 217 218 private INetworkManagementService mNetd; 219 private INetworkStatsService mStatsService; 220 private INetworkPolicyManager mPolicyManager; 221 222 private String mCurrentTcpBufferSizes; 223 224 private static final int ENABLED = 1; 225 private static final int DISABLED = 0; 226 227 private enum ReapUnvalidatedNetworks { 228 // Tear down networks that have no chance (e.g. even if validated) of becoming 229 // the highest scoring network satisfying a NetworkRequest. This should be passed when 230 // all networks have been rematched against all NetworkRequests. 231 REAP, 232 // Don't reap networks. This should be passed when some networks have not yet been 233 // rematched against all NetworkRequests. 234 DONT_REAP 235 }; 236 237 /** 238 * used internally to change our mobile data enabled flag 239 */ 240 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 241 242 /** 243 * used internally to clear a wakelock when transitioning 244 * from one net to another. Clear happens when we get a new 245 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 246 * after a timeout if no network is found (typically 1 min). 247 */ 248 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 249 250 /** 251 * used internally to reload global proxy settings 252 */ 253 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 254 255 /** 256 * used internally to send a sticky broadcast delayed. 257 */ 258 private static final int EVENT_SEND_STICKY_BROADCAST_INTENT = 11; 259 260 /** 261 * PAC manager has received new port. 262 */ 263 private static final int EVENT_PROXY_HAS_CHANGED = 16; 264 265 /** 266 * used internally when registering NetworkFactories 267 * obj = NetworkFactoryInfo 268 */ 269 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 270 271 /** 272 * used internally when registering NetworkAgents 273 * obj = Messenger 274 */ 275 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 276 277 /** 278 * used to add a network request 279 * includes a NetworkRequestInfo 280 */ 281 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 282 283 /** 284 * indicates a timeout period is over - check if we had a network yet or not 285 * and if not, call the timeout calback (but leave the request live until they 286 * cancel it. 287 * includes a NetworkRequestInfo 288 */ 289 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 290 291 /** 292 * used to add a network listener - no request 293 * includes a NetworkRequestInfo 294 */ 295 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 296 297 /** 298 * used to remove a network request, either a listener or a real request 299 * arg1 = UID of caller 300 * obj = NetworkRequest 301 */ 302 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 303 304 /** 305 * used internally when registering NetworkFactories 306 * obj = Messenger 307 */ 308 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 309 310 /** 311 * used internally to expire a wakelock when transitioning 312 * from one net to another. Expire happens when we fail to find 313 * a new network (typically after 1 minute) - 314 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 315 * a replacement network. 316 */ 317 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 318 319 /** 320 * Used internally to indicate the system is ready. 321 */ 322 private static final int EVENT_SYSTEM_READY = 25; 323 324 /** 325 * used to add a network request with a pending intent 326 * obj = NetworkRequestInfo 327 */ 328 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 329 330 /** 331 * used to remove a pending intent and its associated network request. 332 * arg1 = UID of caller 333 * obj = PendingIntent 334 */ 335 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 336 337 /** 338 * used to specify whether a network should be used even if unvalidated. 339 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 340 * arg2 = whether to remember this choice in the future (1 or 0) 341 * obj = network 342 */ 343 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 344 345 /** 346 * used to ask the user to confirm a connection to an unvalidated network. 347 * obj = network 348 */ 349 private static final int EVENT_PROMPT_UNVALIDATED = 29; 350 351 /** 352 * used internally to (re)configure mobile data always-on settings. 353 */ 354 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 355 356 /** 357 * used to add a network listener with a pending intent 358 * obj = NetworkRequestInfo 359 */ 360 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 361 362 /** Handler used for internal events. */ 363 final private InternalHandler mHandler; 364 /** Handler used for incoming {@link NetworkStateTracker} events. */ 365 final private NetworkStateTrackerHandler mTrackerHandler; 366 367 private boolean mSystemReady; 368 private Intent mInitialBroadcast; 369 370 private PowerManager.WakeLock mNetTransitionWakeLock; 371 private String mNetTransitionWakeLockCausedBy = ""; 372 private int mNetTransitionWakeLockSerialNumber; 373 private int mNetTransitionWakeLockTimeout; 374 private final PowerManager.WakeLock mPendingIntentWakeLock; 375 376 private InetAddress mDefaultDns; 377 378 // used in DBG mode to track inet condition reports 379 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 380 private ArrayList mInetLog; 381 382 // track the current default http proxy - tell the world if we get a new one (real change) 383 private volatile ProxyInfo mDefaultProxy = null; 384 private Object mProxyLock = new Object(); 385 private boolean mDefaultProxyDisabled = false; 386 387 // track the global proxy. 388 private ProxyInfo mGlobalProxy = null; 389 390 private PacManager mPacManager = null; 391 392 final private SettingsObserver mSettingsObserver; 393 394 private UserManager mUserManager; 395 396 NetworkConfig[] mNetConfigs; 397 int mNetworksDefined; 398 399 // the set of network types that can only be enabled by system/sig apps 400 List mProtectedNetworks; 401 402 private DataConnectionStats mDataConnectionStats; 403 404 TelephonyManager mTelephonyManager; 405 406 private KeepaliveTracker mKeepaliveTracker; 407 408 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 409 private final static int MIN_NET_ID = 100; // some reserved marks 410 private final static int MAX_NET_ID = 65535; 411 private int mNextNetId = MIN_NET_ID; 412 413 // sequence number of NetworkRequests 414 private int mNextNetworkRequestId = 1; 415 416 // NetworkRequest activity String log entries. 417 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 418 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 419 420 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 421 private static final int MAX_VALIDATION_LOGS = 10; 422 private final ArrayDeque<Pair<Network,ReadOnlyLocalLog>> mValidationLogs = 423 new ArrayDeque<Pair<Network,ReadOnlyLocalLog>>(MAX_VALIDATION_LOGS); 424 425 private void addValidationLogs(ReadOnlyLocalLog log, Network network) { 426 synchronized(mValidationLogs) { 427 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 428 mValidationLogs.removeLast(); 429 } 430 mValidationLogs.addFirst(new Pair(network, log)); 431 } 432 } 433 434 /** 435 * Implements support for the legacy "one network per network type" model. 436 * 437 * We used to have a static array of NetworkStateTrackers, one for each 438 * network type, but that doesn't work any more now that we can have, 439 * for example, more that one wifi network. This class stores all the 440 * NetworkAgentInfo objects that support a given type, but the legacy 441 * API will only see the first one. 442 * 443 * It serves two main purposes: 444 * 445 * 1. Provide information about "the network for a given type" (since this 446 * API only supports one). 447 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 448 * the first network for a given type changes, or if the default network 449 * changes. 450 */ 451 private class LegacyTypeTracker { 452 453 private static final boolean DBG = true; 454 private static final boolean VDBG = false; 455 private static final String TAG = "CSLegacyTypeTracker"; 456 457 /** 458 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 459 * Each list holds references to all NetworkAgentInfos that are used to 460 * satisfy requests for that network type. 461 * 462 * This array is built out at startup such that an unsupported network 463 * doesn't get an ArrayList instance, making this a tristate: 464 * unsupported, supported but not active and active. 465 * 466 * The actual lists are populated when we scan the network types that 467 * are supported on this device. 468 */ 469 private ArrayList<NetworkAgentInfo> mTypeLists[]; 470 471 public LegacyTypeTracker() { 472 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 473 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 474 } 475 476 public void addSupportedType(int type) { 477 if (mTypeLists[type] != null) { 478 throw new IllegalStateException( 479 "legacy list for type " + type + "already initialized"); 480 } 481 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 482 } 483 484 public boolean isTypeSupported(int type) { 485 return isNetworkTypeValid(type) && mTypeLists[type] != null; 486 } 487 488 public NetworkAgentInfo getNetworkForType(int type) { 489 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 490 return mTypeLists[type].get(0); 491 } else { 492 return null; 493 } 494 } 495 496 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 497 boolean isDefaultNetwork) { 498 if (DBG) { 499 log("Sending " + state + 500 " broadcast for type " + type + " " + nai.name() + 501 " isDefaultNetwork=" + isDefaultNetwork); 502 } 503 } 504 505 /** Adds the given network to the specified legacy type list. */ 506 public void add(int type, NetworkAgentInfo nai) { 507 if (!isTypeSupported(type)) { 508 return; // Invalid network type. 509 } 510 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 511 512 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 513 if (list.contains(nai)) { 514 return; 515 } 516 517 list.add(nai); 518 519 // Send a broadcast if this is the first network of its type or if it's the default. 520 final boolean isDefaultNetwork = isDefaultNetwork(nai); 521 if (list.size() == 1 || isDefaultNetwork) { 522 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 523 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 524 } 525 } 526 527 /** Removes the given network from the specified legacy type list. */ 528 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 529 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 530 if (list == null || list.isEmpty()) { 531 return; 532 } 533 534 final boolean wasFirstNetwork = list.get(0).equals(nai); 535 536 if (!list.remove(nai)) { 537 return; 538 } 539 540 final DetailedState state = DetailedState.DISCONNECTED; 541 542 if (wasFirstNetwork || wasDefault) { 543 maybeLogBroadcast(nai, state, type, wasDefault); 544 sendLegacyNetworkBroadcast(nai, state, type); 545 } 546 547 if (!list.isEmpty() && wasFirstNetwork) { 548 if (DBG) log("Other network available for type " + type + 549 ", sending connected broadcast"); 550 final NetworkAgentInfo replacement = list.get(0); 551 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 552 sendLegacyNetworkBroadcast(replacement, state, type); 553 } 554 } 555 556 /** Removes the given network from all legacy type lists. */ 557 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 558 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 559 for (int type = 0; type < mTypeLists.length; type++) { 560 remove(type, nai, wasDefault); 561 } 562 } 563 564 // send out another legacy broadcast - currently only used for suspend/unsuspend 565 // toggle 566 public void update(NetworkAgentInfo nai) { 567 final boolean isDefault = isDefaultNetwork(nai); 568 final DetailedState state = nai.networkInfo.getDetailedState(); 569 for (int type = 0; type < mTypeLists.length; type++) { 570 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 571 final boolean contains = (list != null && list.contains(nai)); 572 final boolean isFirst = (list != null && list.size() > 0 && nai == list.get(0)); 573 if (isFirst || (contains && isDefault)) { 574 maybeLogBroadcast(nai, state, type, isDefault); 575 sendLegacyNetworkBroadcast(nai, state, type); 576 } 577 } 578 } 579 580 private String naiToString(NetworkAgentInfo nai) { 581 String name = (nai != null) ? nai.name() : "null"; 582 String state = (nai.networkInfo != null) ? 583 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 584 "???/???"; 585 return name + " " + state; 586 } 587 588 public void dump(IndentingPrintWriter pw) { 589 pw.println("mLegacyTypeTracker:"); 590 pw.increaseIndent(); 591 pw.print("Supported types:"); 592 for (int type = 0; type < mTypeLists.length; type++) { 593 if (mTypeLists[type] != null) pw.print(" " + type); 594 } 595 pw.println(); 596 pw.println("Current state:"); 597 pw.increaseIndent(); 598 for (int type = 0; type < mTypeLists.length; type++) { 599 if (mTypeLists[type] == null|| mTypeLists[type].size() == 0) continue; 600 for (NetworkAgentInfo nai : mTypeLists[type]) { 601 pw.println(type + " " + naiToString(nai)); 602 } 603 } 604 pw.decreaseIndent(); 605 pw.decreaseIndent(); 606 pw.println(); 607 } 608 609 // This class needs its own log method because it has a different TAG. 610 private void log(String s) { 611 Slog.d(TAG, s); 612 } 613 614 } 615 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 616 617 public ConnectivityService(Context context, INetworkManagementService netManager, 618 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 619 if (DBG) log("ConnectivityService starting up"); 620 621 mDefaultRequest = createInternetRequestForTransport(-1); 622 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, 623 new Binder(), NetworkRequestInfo.REQUEST); 624 mNetworkRequests.put(mDefaultRequest, defaultNRI); 625 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 626 627 mDefaultMobileDataRequest = createInternetRequestForTransport( 628 NetworkCapabilities.TRANSPORT_CELLULAR); 629 630 HandlerThread handlerThread = new HandlerThread("ConnectivityServiceThread"); 631 handlerThread.start(); 632 mHandler = new InternalHandler(handlerThread.getLooper()); 633 mTrackerHandler = new NetworkStateTrackerHandler(handlerThread.getLooper()); 634 635 // setup our unique device name 636 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 637 String id = Settings.Secure.getString(context.getContentResolver(), 638 Settings.Secure.ANDROID_ID); 639 if (id != null && id.length() > 0) { 640 String name = new String("android-").concat(id); 641 SystemProperties.set("net.hostname", name); 642 } 643 } 644 645 // read our default dns server ip 646 String dns = Settings.Global.getString(context.getContentResolver(), 647 Settings.Global.DEFAULT_DNS_SERVER); 648 if (dns == null || dns.length() == 0) { 649 dns = context.getResources().getString( 650 com.android.internal.R.string.config_default_dns_server); 651 } 652 try { 653 mDefaultDns = NetworkUtils.numericToInetAddress(dns); 654 } catch (IllegalArgumentException e) { 655 loge("Error setting defaultDns using " + dns); 656 } 657 658 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 659 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 660 661 mContext = checkNotNull(context, "missing Context"); 662 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 663 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 664 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 665 mKeyStore = KeyStore.getInstance(); 666 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 667 668 try { 669 mPolicyManager.registerListener(mPolicyListener); 670 } catch (RemoteException e) { 671 // ouch, no rules updates means some processes may never get network 672 loge("unable to register INetworkPolicyListener" + e.toString()); 673 } 674 675 final PowerManager powerManager = (PowerManager) context.getSystemService( 676 Context.POWER_SERVICE); 677 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 678 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 679 com.android.internal.R.integer.config_networkTransitionTimeout); 680 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 681 682 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 683 684 // TODO: What is the "correct" way to do determine if this is a wifi only device? 685 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 686 log("wifiOnly=" + wifiOnly); 687 String[] naStrings = context.getResources().getStringArray( 688 com.android.internal.R.array.networkAttributes); 689 for (String naString : naStrings) { 690 try { 691 NetworkConfig n = new NetworkConfig(naString); 692 if (VDBG) log("naString=" + naString + " config=" + n); 693 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 694 loge("Error in networkAttributes - ignoring attempt to define type " + 695 n.type); 696 continue; 697 } 698 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 699 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 700 n.type); 701 continue; 702 } 703 if (mNetConfigs[n.type] != null) { 704 loge("Error in networkAttributes - ignoring attempt to redefine type " + 705 n.type); 706 continue; 707 } 708 mLegacyTypeTracker.addSupportedType(n.type); 709 710 mNetConfigs[n.type] = n; 711 mNetworksDefined++; 712 } catch(Exception e) { 713 // ignore it - leave the entry null 714 } 715 } 716 717 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 718 if (mNetConfigs[TYPE_VPN] == null) { 719 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 720 // don't need to add TYPE_VPN to mNetConfigs. 721 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 722 mNetworksDefined++; // used only in the log() statement below. 723 } 724 725 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 726 727 mProtectedNetworks = new ArrayList<Integer>(); 728 int[] protectedNetworks = context.getResources().getIntArray( 729 com.android.internal.R.array.config_protectedNetworks); 730 for (int p : protectedNetworks) { 731 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 732 mProtectedNetworks.add(p); 733 } else { 734 if (DBG) loge("Ignoring protectedNetwork " + p); 735 } 736 } 737 738 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 739 && SystemProperties.get("ro.build.type").equals("eng"); 740 741 mTethering = new Tethering(mContext, mNetd, statsService, mHandler.getLooper()); 742 743 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 744 745 //set up the listener for user state for creating user VPNs 746 IntentFilter intentFilter = new IntentFilter(); 747 intentFilter.addAction(Intent.ACTION_USER_STARTING); 748 intentFilter.addAction(Intent.ACTION_USER_STOPPING); 749 mContext.registerReceiverAsUser( 750 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 751 752 try { 753 mNetd.registerObserver(mTethering); 754 mNetd.registerObserver(mDataActivityObserver); 755 } catch (RemoteException e) { 756 loge("Error registering observer :" + e); 757 } 758 759 if (DBG) { 760 mInetLog = new ArrayList(); 761 } 762 763 mSettingsObserver = new SettingsObserver(mContext, mHandler); 764 registerSettingsCallbacks(); 765 766 mDataConnectionStats = new DataConnectionStats(mContext); 767 mDataConnectionStats.startMonitoring(); 768 769 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 770 771 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 772 773 mKeepaliveTracker = new KeepaliveTracker(mHandler); 774 } 775 776 private NetworkRequest createInternetRequestForTransport(int transportType) { 777 NetworkCapabilities netCap = new NetworkCapabilities(); 778 netCap.addCapability(NET_CAPABILITY_INTERNET); 779 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 780 if (transportType > -1) { 781 netCap.addTransportType(transportType); 782 } 783 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 784 } 785 786 private void handleMobileDataAlwaysOn() { 787 final boolean enable = (Settings.Global.getInt( 788 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 789 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 790 if (enable == isEnabled) { 791 return; // Nothing to do. 792 } 793 794 if (enable) { 795 handleRegisterNetworkRequest(new NetworkRequestInfo( 796 null, mDefaultMobileDataRequest, new Binder(), NetworkRequestInfo.REQUEST)); 797 } else { 798 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 799 } 800 } 801 802 private void registerSettingsCallbacks() { 803 // Watch for global HTTP proxy changes. 804 mSettingsObserver.observe( 805 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 806 EVENT_APPLY_GLOBAL_HTTP_PROXY); 807 808 // Watch for whether or not to keep mobile data always on. 809 mSettingsObserver.observe( 810 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 811 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 812 } 813 814 private synchronized int nextNetworkRequestId() { 815 return mNextNetworkRequestId++; 816 } 817 818 @VisibleForTesting 819 protected int reserveNetId() { 820 synchronized (mNetworkForNetId) { 821 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 822 int netId = mNextNetId; 823 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 824 // Make sure NetID unused. http://b/16815182 825 if (!mNetIdInUse.get(netId)) { 826 mNetIdInUse.put(netId, true); 827 return netId; 828 } 829 } 830 } 831 throw new IllegalStateException("No free netIds"); 832 } 833 834 private NetworkState getFilteredNetworkState(int networkType, int uid) { 835 NetworkInfo info = null; 836 LinkProperties lp = null; 837 NetworkCapabilities nc = null; 838 Network network = null; 839 String subscriberId = null; 840 841 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 842 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 843 if (nai != null) { 844 synchronized (nai) { 845 info = new NetworkInfo(nai.networkInfo); 846 lp = new LinkProperties(nai.linkProperties); 847 nc = new NetworkCapabilities(nai.networkCapabilities); 848 // Network objects are outwardly immutable so there is no point to duplicating. 849 // Duplicating also precludes sharing socket factories and connection pools. 850 network = nai.network; 851 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 852 } 853 info.setType(networkType); 854 } else { 855 info = new NetworkInfo(networkType, 0, getNetworkTypeName(networkType), ""); 856 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 857 info.setIsAvailable(true); 858 lp = new LinkProperties(); 859 nc = new NetworkCapabilities(); 860 network = null; 861 } 862 info = getFilteredNetworkInfo(info, lp, uid); 863 } 864 865 return new NetworkState(info, lp, nc, network, subscriberId, null); 866 } 867 868 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 869 if (network == null) { 870 return null; 871 } 872 synchronized (mNetworkForNetId) { 873 return mNetworkForNetId.get(network.netId); 874 } 875 }; 876 877 private Network[] getVpnUnderlyingNetworks(int uid) { 878 if (!mLockdownEnabled) { 879 int user = UserHandle.getUserId(uid); 880 synchronized (mVpns) { 881 Vpn vpn = mVpns.get(user); 882 if (vpn != null && vpn.appliesToUid(uid)) { 883 return vpn.getUnderlyingNetworks(); 884 } 885 } 886 } 887 return null; 888 } 889 890 private NetworkState getUnfilteredActiveNetworkState(int uid) { 891 NetworkInfo info = null; 892 LinkProperties lp = null; 893 NetworkCapabilities nc = null; 894 Network network = null; 895 String subscriberId = null; 896 897 NetworkAgentInfo nai = getDefaultNetwork(); 898 899 final Network[] networks = getVpnUnderlyingNetworks(uid); 900 if (networks != null) { 901 // getUnderlyingNetworks() returns: 902 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 903 // empty array => the VPN explicitly said "no default network". 904 // non-empty array => the VPN specified one or more default networks; we use the 905 // first one. 906 if (networks.length > 0) { 907 nai = getNetworkAgentInfoForNetwork(networks[0]); 908 } else { 909 nai = null; 910 } 911 } 912 913 if (nai != null) { 914 synchronized (nai) { 915 info = new NetworkInfo(nai.networkInfo); 916 lp = new LinkProperties(nai.linkProperties); 917 nc = new NetworkCapabilities(nai.networkCapabilities); 918 // Network objects are outwardly immutable so there is no point to duplicating. 919 // Duplicating also precludes sharing socket factories and connection pools. 920 network = nai.network; 921 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 922 } 923 } 924 925 return new NetworkState(info, lp, nc, network, subscriberId, null); 926 } 927 928 /** 929 * Check if UID should be blocked from using the network with the given LinkProperties. 930 */ 931 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 932 final boolean networkCostly; 933 final int uidRules; 934 935 final String iface = (lp == null ? "" : lp.getInterfaceName()); 936 synchronized (mRulesLock) { 937 networkCostly = mMeteredIfaces.contains(iface); 938 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 939 } 940 941 if ((uidRules & RULE_REJECT_ALL) != 0 942 || (networkCostly && (uidRules & RULE_REJECT_METERED) != 0)) { 943 return true; 944 } 945 946 // no restrictive rules; network is visible 947 return false; 948 } 949 950 /** 951 * Return a filtered {@link NetworkInfo}, potentially marked 952 * {@link DetailedState#BLOCKED} based on 953 * {@link #isNetworkWithLinkPropertiesBlocked}. 954 */ 955 private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, LinkProperties lp, int uid) { 956 if (info != null && isNetworkWithLinkPropertiesBlocked(lp, uid)) { 957 // network is blocked; clone and override state 958 info = new NetworkInfo(info); 959 info.setDetailedState(DetailedState.BLOCKED, null, null); 960 if (VDBG) { 961 log("returning Blocked NetworkInfo for ifname=" + 962 lp.getInterfaceName() + ", uid=" + uid); 963 } 964 } 965 if (info != null && mLockdownTracker != null) { 966 info = mLockdownTracker.augmentNetworkInfo(info); 967 if (VDBG) log("returning Locked NetworkInfo"); 968 } 969 return info; 970 } 971 972 /** 973 * Return NetworkInfo for the active (i.e., connected) network interface. 974 * It is assumed that at most one network is active at a time. If more 975 * than one is active, it is indeterminate which will be returned. 976 * @return the info for the active network, or {@code null} if none is 977 * active 978 */ 979 @Override 980 public NetworkInfo getActiveNetworkInfo() { 981 enforceAccessPermission(); 982 final int uid = Binder.getCallingUid(); 983 NetworkState state = getUnfilteredActiveNetworkState(uid); 984 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 985 } 986 987 @Override 988 public Network getActiveNetwork() { 989 enforceAccessPermission(); 990 final int uid = Binder.getCallingUid(); 991 final int user = UserHandle.getUserId(uid); 992 int vpnNetId = NETID_UNSET; 993 synchronized (mVpns) { 994 final Vpn vpn = mVpns.get(user); 995 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 996 } 997 NetworkAgentInfo nai; 998 if (vpnNetId != NETID_UNSET) { 999 synchronized (mNetworkForNetId) { 1000 nai = mNetworkForNetId.get(vpnNetId); 1001 } 1002 if (nai != null) return nai.network; 1003 } 1004 nai = getDefaultNetwork(); 1005 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 1006 return nai != null ? nai.network : null; 1007 } 1008 1009 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1010 enforceAccessPermission(); 1011 final int uid = Binder.getCallingUid(); 1012 NetworkState state = getUnfilteredActiveNetworkState(uid); 1013 return state.networkInfo; 1014 } 1015 1016 @Override 1017 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 1018 enforceConnectivityInternalPermission(); 1019 NetworkState state = getUnfilteredActiveNetworkState(uid); 1020 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1021 } 1022 1023 @Override 1024 public NetworkInfo getNetworkInfo(int networkType) { 1025 enforceAccessPermission(); 1026 final int uid = Binder.getCallingUid(); 1027 if (getVpnUnderlyingNetworks(uid) != null) { 1028 // A VPN is active, so we may need to return one of its underlying networks. This 1029 // information is not available in LegacyTypeTracker, so we have to get it from 1030 // getUnfilteredActiveNetworkState. 1031 NetworkState state = getUnfilteredActiveNetworkState(uid); 1032 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1033 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1034 } 1035 } 1036 NetworkState state = getFilteredNetworkState(networkType, uid); 1037 return state.networkInfo; 1038 } 1039 1040 @Override 1041 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1042 enforceAccessPermission(); 1043 final int uid = Binder.getCallingUid(); 1044 NetworkInfo info = null; 1045 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1046 if (nai != null) { 1047 synchronized (nai) { 1048 info = new NetworkInfo(nai.networkInfo); 1049 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1050 } 1051 } 1052 return info; 1053 } 1054 1055 @Override 1056 public NetworkInfo[] getAllNetworkInfo() { 1057 enforceAccessPermission(); 1058 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1059 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1060 networkType++) { 1061 NetworkInfo info = getNetworkInfo(networkType); 1062 if (info != null) { 1063 result.add(info); 1064 } 1065 } 1066 return result.toArray(new NetworkInfo[result.size()]); 1067 } 1068 1069 @Override 1070 public Network getNetworkForType(int networkType) { 1071 enforceAccessPermission(); 1072 final int uid = Binder.getCallingUid(); 1073 NetworkState state = getFilteredNetworkState(networkType, uid); 1074 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1075 return state.network; 1076 } 1077 return null; 1078 } 1079 1080 @Override 1081 public Network[] getAllNetworks() { 1082 enforceAccessPermission(); 1083 synchronized (mNetworkForNetId) { 1084 final Network[] result = new Network[mNetworkForNetId.size()]; 1085 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1086 result[i] = mNetworkForNetId.valueAt(i).network; 1087 } 1088 return result; 1089 } 1090 } 1091 1092 @Override 1093 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1094 // The basic principle is: if an app's traffic could possibly go over a 1095 // network, without the app doing anything multinetwork-specific, 1096 // (hence, by "default"), then include that network's capabilities in 1097 // the array. 1098 // 1099 // In the normal case, app traffic only goes over the system's default 1100 // network connection, so that's the only network returned. 1101 // 1102 // With a VPN in force, some app traffic may go into the VPN, and thus 1103 // over whatever underlying networks the VPN specifies, while other app 1104 // traffic may go over the system default network (e.g.: a split-tunnel 1105 // VPN, or an app disallowed by the VPN), so the set of networks 1106 // returned includes the VPN's underlying networks and the system 1107 // default. 1108 enforceAccessPermission(); 1109 1110 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1111 1112 NetworkAgentInfo nai = getDefaultNetwork(); 1113 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1114 if (nc != null) { 1115 result.put(nai.network, nc); 1116 } 1117 1118 if (!mLockdownEnabled) { 1119 synchronized (mVpns) { 1120 Vpn vpn = mVpns.get(userId); 1121 if (vpn != null) { 1122 Network[] networks = vpn.getUnderlyingNetworks(); 1123 if (networks != null) { 1124 for (Network network : networks) { 1125 nai = getNetworkAgentInfoForNetwork(network); 1126 nc = getNetworkCapabilitiesInternal(nai); 1127 if (nc != null) { 1128 result.put(network, nc); 1129 } 1130 } 1131 } 1132 } 1133 } 1134 } 1135 1136 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1137 out = result.values().toArray(out); 1138 return out; 1139 } 1140 1141 @Override 1142 public boolean isNetworkSupported(int networkType) { 1143 enforceAccessPermission(); 1144 return mLegacyTypeTracker.isTypeSupported(networkType); 1145 } 1146 1147 /** 1148 * Return LinkProperties for the active (i.e., connected) default 1149 * network interface. It is assumed that at most one default network 1150 * is active at a time. If more than one is active, it is indeterminate 1151 * which will be returned. 1152 * @return the ip properties for the active network, or {@code null} if 1153 * none is active 1154 */ 1155 @Override 1156 public LinkProperties getActiveLinkProperties() { 1157 enforceAccessPermission(); 1158 final int uid = Binder.getCallingUid(); 1159 NetworkState state = getUnfilteredActiveNetworkState(uid); 1160 return state.linkProperties; 1161 } 1162 1163 @Override 1164 public LinkProperties getLinkPropertiesForType(int networkType) { 1165 enforceAccessPermission(); 1166 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1167 if (nai != null) { 1168 synchronized (nai) { 1169 return new LinkProperties(nai.linkProperties); 1170 } 1171 } 1172 return null; 1173 } 1174 1175 // TODO - this should be ALL networks 1176 @Override 1177 public LinkProperties getLinkProperties(Network network) { 1178 enforceAccessPermission(); 1179 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1180 if (nai != null) { 1181 synchronized (nai) { 1182 return new LinkProperties(nai.linkProperties); 1183 } 1184 } 1185 return null; 1186 } 1187 1188 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1189 if (nai != null) { 1190 synchronized (nai) { 1191 if (nai.networkCapabilities != null) { 1192 return new NetworkCapabilities(nai.networkCapabilities); 1193 } 1194 } 1195 } 1196 return null; 1197 } 1198 1199 @Override 1200 public NetworkCapabilities getNetworkCapabilities(Network network) { 1201 enforceAccessPermission(); 1202 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1203 } 1204 1205 @Override 1206 public NetworkState[] getAllNetworkState() { 1207 // Require internal since we're handing out IMSI details 1208 enforceConnectivityInternalPermission(); 1209 1210 final ArrayList<NetworkState> result = Lists.newArrayList(); 1211 for (Network network : getAllNetworks()) { 1212 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1213 if (nai != null) { 1214 synchronized (nai) { 1215 final String subscriberId = (nai.networkMisc != null) 1216 ? nai.networkMisc.subscriberId : null; 1217 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1218 nai.networkCapabilities, network, subscriberId, null)); 1219 } 1220 } 1221 } 1222 return result.toArray(new NetworkState[result.size()]); 1223 } 1224 1225 @Override 1226 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1227 enforceAccessPermission(); 1228 final int uid = Binder.getCallingUid(); 1229 final long token = Binder.clearCallingIdentity(); 1230 try { 1231 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1232 if (state.networkInfo != null) { 1233 try { 1234 return mPolicyManager.getNetworkQuotaInfo(state); 1235 } catch (RemoteException e) { 1236 } 1237 } 1238 return null; 1239 } finally { 1240 Binder.restoreCallingIdentity(token); 1241 } 1242 } 1243 1244 @Override 1245 public boolean isActiveNetworkMetered() { 1246 enforceAccessPermission(); 1247 final int uid = Binder.getCallingUid(); 1248 final long token = Binder.clearCallingIdentity(); 1249 try { 1250 return isActiveNetworkMeteredUnchecked(uid); 1251 } finally { 1252 Binder.restoreCallingIdentity(token); 1253 } 1254 } 1255 1256 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1257 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1258 if (state.networkInfo != null) { 1259 try { 1260 return mPolicyManager.isNetworkMetered(state); 1261 } catch (RemoteException e) { 1262 } 1263 } 1264 return false; 1265 } 1266 1267 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1268 @Override 1269 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1270 int deviceType = Integer.parseInt(label); 1271 sendDataActivityBroadcast(deviceType, active, tsNanos); 1272 } 1273 }; 1274 1275 /** 1276 * Ensure that a network route exists to deliver traffic to the specified 1277 * host via the specified network interface. 1278 * @param networkType the type of the network over which traffic to the 1279 * specified host is to be routed 1280 * @param hostAddress the IP address of the host to which the route is 1281 * desired 1282 * @return {@code true} on success, {@code false} on failure 1283 */ 1284 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1285 enforceChangePermission(); 1286 if (mProtectedNetworks.contains(networkType)) { 1287 enforceConnectivityInternalPermission(); 1288 } 1289 1290 InetAddress addr; 1291 try { 1292 addr = InetAddress.getByAddress(hostAddress); 1293 } catch (UnknownHostException e) { 1294 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1295 return false; 1296 } 1297 1298 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1299 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1300 return false; 1301 } 1302 1303 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1304 if (nai == null) { 1305 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1306 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1307 } else { 1308 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1309 } 1310 return false; 1311 } 1312 1313 DetailedState netState; 1314 synchronized (nai) { 1315 netState = nai.networkInfo.getDetailedState(); 1316 } 1317 1318 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1319 if (VDBG) { 1320 log("requestRouteToHostAddress on down network " 1321 + "(" + networkType + ") - dropped" 1322 + " netState=" + netState); 1323 } 1324 return false; 1325 } 1326 1327 final int uid = Binder.getCallingUid(); 1328 final long token = Binder.clearCallingIdentity(); 1329 try { 1330 LinkProperties lp; 1331 int netId; 1332 synchronized (nai) { 1333 lp = nai.linkProperties; 1334 netId = nai.network.netId; 1335 } 1336 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1337 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1338 return ok; 1339 } finally { 1340 Binder.restoreCallingIdentity(token); 1341 } 1342 } 1343 1344 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1345 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1346 if (bestRoute == null) { 1347 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1348 } else { 1349 String iface = bestRoute.getInterface(); 1350 if (bestRoute.getGateway().equals(addr)) { 1351 // if there is no better route, add the implied hostroute for our gateway 1352 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1353 } else { 1354 // if we will connect to this through another route, add a direct route 1355 // to it's gateway 1356 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1357 } 1358 } 1359 if (DBG) log("Adding " + bestRoute + " for interface " + bestRoute.getInterface()); 1360 try { 1361 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1362 } catch (Exception e) { 1363 // never crash - catch them all 1364 if (DBG) loge("Exception trying to add a route: " + e); 1365 return false; 1366 } 1367 return true; 1368 } 1369 1370 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1371 @Override 1372 public void onUidRulesChanged(int uid, int uidRules) { 1373 // caller is NPMS, since we only register with them 1374 if (LOGD_RULES) { 1375 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1376 } 1377 1378 synchronized (mRulesLock) { 1379 // skip update when we've already applied rules 1380 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1381 if (oldRules == uidRules) return; 1382 1383 mUidRules.put(uid, uidRules); 1384 } 1385 1386 // TODO: notify UID when it has requested targeted updates 1387 } 1388 1389 @Override 1390 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1391 // caller is NPMS, since we only register with them 1392 if (LOGD_RULES) { 1393 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1394 } 1395 1396 synchronized (mRulesLock) { 1397 mMeteredIfaces.clear(); 1398 for (String iface : meteredIfaces) { 1399 mMeteredIfaces.add(iface); 1400 } 1401 } 1402 } 1403 1404 @Override 1405 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1406 // caller is NPMS, since we only register with them 1407 if (LOGD_RULES) { 1408 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1409 } 1410 } 1411 }; 1412 1413 /** 1414 * Require that the caller is either in the same user or has appropriate permission to interact 1415 * across users. 1416 * 1417 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1418 */ 1419 private void enforceCrossUserPermission(int userId) { 1420 if (userId == UserHandle.getCallingUserId()) { 1421 // Not a cross-user call. 1422 return; 1423 } 1424 mContext.enforceCallingOrSelfPermission( 1425 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1426 "ConnectivityService"); 1427 } 1428 1429 private void enforceInternetPermission() { 1430 mContext.enforceCallingOrSelfPermission( 1431 android.Manifest.permission.INTERNET, 1432 "ConnectivityService"); 1433 } 1434 1435 private void enforceAccessPermission() { 1436 mContext.enforceCallingOrSelfPermission( 1437 android.Manifest.permission.ACCESS_NETWORK_STATE, 1438 "ConnectivityService"); 1439 } 1440 1441 private void enforceChangePermission() { 1442 int uid = Binder.getCallingUid(); 1443 Settings.checkAndNoteChangeNetworkStateOperation(mContext, uid, Settings 1444 .getPackageNameForUid(mContext, uid), true); 1445 1446 } 1447 1448 private void enforceTetherAccessPermission() { 1449 mContext.enforceCallingOrSelfPermission( 1450 android.Manifest.permission.ACCESS_NETWORK_STATE, 1451 "ConnectivityService"); 1452 } 1453 1454 private void enforceConnectivityInternalPermission() { 1455 mContext.enforceCallingOrSelfPermission( 1456 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1457 "ConnectivityService"); 1458 } 1459 1460 private void enforceKeepalivePermission() { 1461 mContext.enforceCallingPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1462 } 1463 1464 public void sendConnectedBroadcast(NetworkInfo info) { 1465 enforceConnectivityInternalPermission(); 1466 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1467 } 1468 1469 private void sendInetConditionBroadcast(NetworkInfo info) { 1470 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1471 } 1472 1473 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1474 if (mLockdownTracker != null) { 1475 info = mLockdownTracker.augmentNetworkInfo(info); 1476 } 1477 1478 Intent intent = new Intent(bcastType); 1479 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1480 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1481 if (info.isFailover()) { 1482 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1483 info.setFailover(false); 1484 } 1485 if (info.getReason() != null) { 1486 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1487 } 1488 if (info.getExtraInfo() != null) { 1489 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1490 info.getExtraInfo()); 1491 } 1492 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1493 return intent; 1494 } 1495 1496 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1497 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1498 } 1499 1500 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1501 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1502 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1503 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1504 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1505 final long ident = Binder.clearCallingIdentity(); 1506 try { 1507 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1508 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1509 } finally { 1510 Binder.restoreCallingIdentity(ident); 1511 } 1512 } 1513 1514 private void sendStickyBroadcast(Intent intent) { 1515 synchronized(this) { 1516 if (!mSystemReady) { 1517 mInitialBroadcast = new Intent(intent); 1518 } 1519 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1520 if (DBG) { 1521 log("sendStickyBroadcast: action=" + intent.getAction()); 1522 } 1523 1524 final long ident = Binder.clearCallingIdentity(); 1525 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1526 final NetworkInfo ni = intent.getParcelableExtra( 1527 ConnectivityManager.EXTRA_NETWORK_INFO); 1528 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1529 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1530 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1531 } 1532 final IBatteryStats bs = BatteryStatsService.getService(); 1533 try { 1534 bs.noteConnectivityChanged(intent.getIntExtra( 1535 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1536 ni != null ? ni.getState().toString() : "?"); 1537 } catch (RemoteException e) { 1538 } 1539 } 1540 try { 1541 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 1542 } finally { 1543 Binder.restoreCallingIdentity(ident); 1544 } 1545 } 1546 } 1547 1548 void systemReady() { 1549 loadGlobalProxy(); 1550 1551 synchronized(this) { 1552 mSystemReady = true; 1553 if (mInitialBroadcast != null) { 1554 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1555 mInitialBroadcast = null; 1556 } 1557 } 1558 // load the global proxy at startup 1559 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1560 1561 // Try bringing up tracker, but if KeyStore isn't ready yet, wait 1562 // for user to unlock device. 1563 if (!updateLockdownVpn()) { 1564 final IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT); 1565 mContext.registerReceiver(mUserPresentReceiver, filter); 1566 } 1567 1568 // Configure whether mobile data is always on. 1569 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1570 1571 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1572 1573 mPermissionMonitor.startMonitoring(); 1574 } 1575 1576 private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() { 1577 @Override 1578 public void onReceive(Context context, Intent intent) { 1579 // Try creating lockdown tracker, since user present usually means 1580 // unlocked keystore. 1581 if (updateLockdownVpn()) { 1582 mContext.unregisterReceiver(this); 1583 } 1584 } 1585 }; 1586 1587 /** 1588 * Setup data activity tracking for the given network. 1589 * 1590 * Every {@code setupDataActivityTracking} should be paired with a 1591 * {@link #removeDataActivityTracking} for cleanup. 1592 */ 1593 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1594 final String iface = networkAgent.linkProperties.getInterfaceName(); 1595 1596 final int timeout; 1597 int type = ConnectivityManager.TYPE_NONE; 1598 1599 if (networkAgent.networkCapabilities.hasTransport( 1600 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1601 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1602 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1603 10); 1604 type = ConnectivityManager.TYPE_MOBILE; 1605 } else if (networkAgent.networkCapabilities.hasTransport( 1606 NetworkCapabilities.TRANSPORT_WIFI)) { 1607 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1608 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1609 15); 1610 type = ConnectivityManager.TYPE_WIFI; 1611 } else { 1612 // do not track any other networks 1613 timeout = 0; 1614 } 1615 1616 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1617 try { 1618 mNetd.addIdleTimer(iface, timeout, type); 1619 } catch (Exception e) { 1620 // You shall not crash! 1621 loge("Exception in setupDataActivityTracking " + e); 1622 } 1623 } 1624 } 1625 1626 /** 1627 * Remove data activity tracking when network disconnects. 1628 */ 1629 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1630 final String iface = networkAgent.linkProperties.getInterfaceName(); 1631 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1632 1633 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1634 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1635 try { 1636 // the call fails silently if no idletimer setup for this interface 1637 mNetd.removeIdleTimer(iface); 1638 } catch (Exception e) { 1639 loge("Exception in removeDataActivityTracking " + e); 1640 } 1641 } 1642 } 1643 1644 /** 1645 * Reads the network specific MTU size from reources. 1646 * and set it on it's iface. 1647 */ 1648 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1649 final String iface = newLp.getInterfaceName(); 1650 final int mtu = newLp.getMtu(); 1651 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1652 if (VDBG) log("identical MTU - not setting"); 1653 return; 1654 } 1655 1656 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1657 loge("Unexpected mtu value: " + mtu + ", " + iface); 1658 return; 1659 } 1660 1661 // Cannot set MTU without interface name 1662 if (TextUtils.isEmpty(iface)) { 1663 loge("Setting MTU size with null iface."); 1664 return; 1665 } 1666 1667 try { 1668 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1669 mNetd.setMtu(iface, mtu); 1670 } catch (Exception e) { 1671 Slog.e(TAG, "exception in setMtu()" + e); 1672 } 1673 } 1674 1675 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1676 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1677 1678 // Overridden for testing purposes to avoid writing to SystemProperties. 1679 @VisibleForTesting 1680 protected int getDefaultTcpRwnd() { 1681 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1682 } 1683 1684 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1685 if (isDefaultNetwork(nai) == false) { 1686 return; 1687 } 1688 1689 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1690 String[] values = null; 1691 if (tcpBufferSizes != null) { 1692 values = tcpBufferSizes.split(","); 1693 } 1694 1695 if (values == null || values.length != 6) { 1696 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1697 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1698 values = tcpBufferSizes.split(","); 1699 } 1700 1701 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1702 1703 try { 1704 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1705 1706 final String prefix = "/sys/kernel/ipv4/tcp_"; 1707 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1708 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1709 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1710 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1711 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1712 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1713 mCurrentTcpBufferSizes = tcpBufferSizes; 1714 } catch (IOException e) { 1715 loge("Can't set TCP buffer sizes:" + e); 1716 } 1717 1718 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1719 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1720 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1721 if (rwndValue != 0) { 1722 SystemProperties.set(sysctlKey, rwndValue.toString()); 1723 } 1724 } 1725 1726 private void flushVmDnsCache() { 1727 /* 1728 * Tell the VMs to toss their DNS caches 1729 */ 1730 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1731 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1732 /* 1733 * Connectivity events can happen before boot has completed ... 1734 */ 1735 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1736 final long ident = Binder.clearCallingIdentity(); 1737 try { 1738 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1739 } finally { 1740 Binder.restoreCallingIdentity(ident); 1741 } 1742 } 1743 1744 @Override 1745 public int getRestoreDefaultNetworkDelay(int networkType) { 1746 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1747 NETWORK_RESTORE_DELAY_PROP_NAME); 1748 if(restoreDefaultNetworkDelayStr != null && 1749 restoreDefaultNetworkDelayStr.length() != 0) { 1750 try { 1751 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1752 } catch (NumberFormatException e) { 1753 } 1754 } 1755 // if the system property isn't set, use the value for the apn type 1756 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1757 1758 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1759 (mNetConfigs[networkType] != null)) { 1760 ret = mNetConfigs[networkType].restoreTime; 1761 } 1762 return ret; 1763 } 1764 1765 private boolean argsContain(String[] args, String target) { 1766 for (String arg : args) { 1767 if (arg.equals(target)) return true; 1768 } 1769 return false; 1770 } 1771 1772 @Override 1773 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1774 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1775 if (mContext.checkCallingOrSelfPermission( 1776 android.Manifest.permission.DUMP) 1777 != PackageManager.PERMISSION_GRANTED) { 1778 pw.println("Permission Denial: can't dump ConnectivityService " + 1779 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1780 Binder.getCallingUid()); 1781 return; 1782 } 1783 1784 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1785 if (argsContain(args, "--diag")) { 1786 final long DIAG_TIME_MS = 5000; 1787 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1788 // Start gathering diagnostic information. 1789 netDiags.add(new NetworkDiagnostics( 1790 nai.network, 1791 new LinkProperties(nai.linkProperties), // Must be a copy. 1792 DIAG_TIME_MS)); 1793 } 1794 1795 for (NetworkDiagnostics netDiag : netDiags) { 1796 pw.println(); 1797 netDiag.waitForMeasurements(); 1798 netDiag.dump(pw); 1799 } 1800 1801 return; 1802 } 1803 1804 pw.print("NetworkFactories for:"); 1805 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1806 pw.print(" " + nfi.name); 1807 } 1808 pw.println(); 1809 pw.println(); 1810 1811 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1812 pw.print("Active default network: "); 1813 if (defaultNai == null) { 1814 pw.println("none"); 1815 } else { 1816 pw.println(defaultNai.network.netId); 1817 } 1818 pw.println(); 1819 1820 pw.println("Current Networks:"); 1821 pw.increaseIndent(); 1822 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1823 pw.println(nai.toString()); 1824 pw.increaseIndent(); 1825 pw.println("Requests:"); 1826 pw.increaseIndent(); 1827 for (int i = 0; i < nai.networkRequests.size(); i++) { 1828 pw.println(nai.networkRequests.valueAt(i).toString()); 1829 } 1830 pw.decreaseIndent(); 1831 pw.println("Lingered:"); 1832 pw.increaseIndent(); 1833 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1834 pw.decreaseIndent(); 1835 pw.decreaseIndent(); 1836 } 1837 pw.decreaseIndent(); 1838 pw.println(); 1839 1840 pw.println("Network Requests:"); 1841 pw.increaseIndent(); 1842 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1843 pw.println(nri.toString()); 1844 } 1845 pw.println(); 1846 pw.decreaseIndent(); 1847 1848 mLegacyTypeTracker.dump(pw); 1849 1850 synchronized (this) { 1851 pw.print("mNetTransitionWakeLock: currently " + 1852 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1853 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1854 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1855 } else { 1856 pw.println(", last requested never"); 1857 } 1858 } 1859 1860 pw.println(); 1861 mTethering.dump(fd, pw, args); 1862 1863 pw.println(); 1864 mKeepaliveTracker.dump(pw); 1865 1866 if (mInetLog != null && mInetLog.size() > 0) { 1867 pw.println(); 1868 pw.println("Inet condition reports:"); 1869 pw.increaseIndent(); 1870 for(int i = 0; i < mInetLog.size(); i++) { 1871 pw.println(mInetLog.get(i)); 1872 } 1873 pw.decreaseIndent(); 1874 } 1875 1876 if (argsContain(args, "--short") == false) { 1877 pw.println(); 1878 synchronized (mValidationLogs) { 1879 pw.println("mValidationLogs (most recent first):"); 1880 for (Pair<Network,ReadOnlyLocalLog> p : mValidationLogs) { 1881 pw.println(p.first); 1882 pw.increaseIndent(); 1883 p.second.dump(fd, pw, args); 1884 pw.decreaseIndent(); 1885 } 1886 } 1887 1888 pw.println(); 1889 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1890 pw.increaseIndent(); 1891 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1892 pw.decreaseIndent(); 1893 } 1894 } 1895 1896 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, String msg) { 1897 if (nai.network == null) return false; 1898 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1899 if (officialNai != null && officialNai.equals(nai)) return true; 1900 if (officialNai != null || VDBG) { 1901 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1902 " - " + nai); 1903 } 1904 return false; 1905 } 1906 1907 private boolean isRequest(NetworkRequest request) { 1908 return mNetworkRequests.get(request).isRequest; 1909 } 1910 1911 // must be stateless - things change under us. 1912 private class NetworkStateTrackerHandler extends Handler { 1913 public NetworkStateTrackerHandler(Looper looper) { 1914 super(looper); 1915 } 1916 1917 @Override 1918 public void handleMessage(Message msg) { 1919 NetworkInfo info; 1920 switch (msg.what) { 1921 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1922 handleAsyncChannelHalfConnect(msg); 1923 break; 1924 } 1925 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1926 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1927 if (nai != null) nai.asyncChannel.disconnect(); 1928 break; 1929 } 1930 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1931 handleAsyncChannelDisconnected(msg); 1932 break; 1933 } 1934 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1935 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1936 if (nai == null) { 1937 loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent"); 1938 } else { 1939 final NetworkCapabilities networkCapabilities = 1940 (NetworkCapabilities)msg.obj; 1941 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 1942 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 1943 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 1944 } 1945 if (nai.created && !nai.networkCapabilities.equalImmutableCapabilities( 1946 networkCapabilities)) { 1947 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 1948 + nai.networkCapabilities + " -> " + networkCapabilities); 1949 } 1950 updateCapabilities(nai, networkCapabilities); 1951 } 1952 break; 1953 } 1954 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1955 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1956 if (nai == null) { 1957 loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED"); 1958 } else { 1959 if (VDBG) { 1960 log("Update of LinkProperties for " + nai.name() + 1961 "; created=" + nai.created); 1962 } 1963 LinkProperties oldLp = nai.linkProperties; 1964 synchronized (nai) { 1965 nai.linkProperties = (LinkProperties)msg.obj; 1966 } 1967 if (nai.created) updateLinkProperties(nai, oldLp); 1968 } 1969 break; 1970 } 1971 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1972 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1973 if (nai == null) { 1974 loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent"); 1975 break; 1976 } 1977 info = (NetworkInfo) msg.obj; 1978 updateNetworkInfo(nai, info); 1979 break; 1980 } 1981 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1982 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1983 if (nai == null) { 1984 loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent"); 1985 break; 1986 } 1987 Integer score = (Integer) msg.obj; 1988 if (score != null) updateNetworkScore(nai, score.intValue()); 1989 break; 1990 } 1991 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 1992 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1993 if (nai == null) { 1994 loge("EVENT_UID_RANGES_ADDED from unknown NetworkAgent"); 1995 break; 1996 } 1997 try { 1998 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1999 } catch (Exception e) { 2000 // Never crash! 2001 loge("Exception in addVpnUidRanges: " + e); 2002 } 2003 break; 2004 } 2005 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2006 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2007 if (nai == null) { 2008 loge("EVENT_UID_RANGES_REMOVED from unknown NetworkAgent"); 2009 break; 2010 } 2011 try { 2012 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2013 } catch (Exception e) { 2014 // Never crash! 2015 loge("Exception in removeVpnUidRanges: " + e); 2016 } 2017 break; 2018 } 2019 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2020 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2021 if (nai == null) { 2022 loge("EVENT_SET_EXPLICITLY_SELECTED from unknown NetworkAgent"); 2023 break; 2024 } 2025 if (nai.created && !nai.networkMisc.explicitlySelected) { 2026 loge("ERROR: created network explicitly selected."); 2027 } 2028 nai.networkMisc.explicitlySelected = true; 2029 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2030 break; 2031 } 2032 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2033 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2034 if (nai == null) { 2035 loge("EVENT_PACKET_KEEPALIVE from unknown NetworkAgent"); 2036 break; 2037 } 2038 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2039 break; 2040 } 2041 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2042 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2043 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_TESTED")) { 2044 final boolean valid = 2045 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2046 if (DBG) log(nai.name() + " validation " + (valid ? " passed" : "failed")); 2047 if (valid != nai.lastValidated) { 2048 final int oldScore = nai.getCurrentScore(); 2049 nai.lastValidated = valid; 2050 nai.everValidated |= valid; 2051 updateCapabilities(nai, nai.networkCapabilities); 2052 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2053 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2054 } 2055 updateInetCondition(nai); 2056 // Let the NetworkAgent know the state of its network 2057 nai.asyncChannel.sendMessage( 2058 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2059 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2060 0, null); 2061 } 2062 break; 2063 } 2064 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 2065 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2066 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_LINGER_COMPLETE")) { 2067 handleLingerComplete(nai); 2068 } 2069 break; 2070 } 2071 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2072 final int netId = msg.arg2; 2073 final boolean visible = (msg.arg1 != 0); 2074 final NetworkAgentInfo nai; 2075 synchronized (mNetworkForNetId) { 2076 nai = mNetworkForNetId.get(netId); 2077 } 2078 // If captive portal status has changed, update capabilities. 2079 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2080 nai.lastCaptivePortalDetected = visible; 2081 nai.everCaptivePortalDetected |= visible; 2082 updateCapabilities(nai, nai.networkCapabilities); 2083 } 2084 if (!visible) { 2085 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2086 } else { 2087 if (nai == null) { 2088 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2089 break; 2090 } 2091 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2092 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2093 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2094 } 2095 break; 2096 } 2097 } 2098 } 2099 } 2100 2101 private void linger(NetworkAgentInfo nai) { 2102 nai.lingering = true; 2103 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 2104 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 2105 } 2106 2107 // Cancel any lingering so the linger timeout doesn't teardown a network. 2108 // This should be called when a network begins satisfying a NetworkRequest. 2109 // Note: depending on what state the NetworkMonitor is in (e.g., 2110 // if it's awaiting captive portal login, or if validation failed), this 2111 // may trigger a re-evaluation of the network. 2112 private void unlinger(NetworkAgentInfo nai) { 2113 nai.networkLingered.clear(); 2114 if (!nai.lingering) return; 2115 nai.lingering = false; 2116 if (VDBG) log("Canceling linger of " + nai.name()); 2117 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2118 } 2119 2120 private void handleAsyncChannelHalfConnect(Message msg) { 2121 AsyncChannel ac = (AsyncChannel) msg.obj; 2122 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2123 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2124 if (VDBG) log("NetworkFactory connected"); 2125 // A network factory has connected. Send it all current NetworkRequests. 2126 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2127 if (nri.isRequest == false) continue; 2128 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2129 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2130 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2131 } 2132 } else { 2133 loge("Error connecting NetworkFactory"); 2134 mNetworkFactoryInfos.remove(msg.obj); 2135 } 2136 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2137 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2138 if (VDBG) log("NetworkAgent connected"); 2139 // A network agent has requested a connection. Establish the connection. 2140 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2141 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2142 } else { 2143 loge("Error connecting NetworkAgent"); 2144 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2145 if (nai != null) { 2146 final boolean wasDefault = isDefaultNetwork(nai); 2147 synchronized (mNetworkForNetId) { 2148 mNetworkForNetId.remove(nai.network.netId); 2149 mNetIdInUse.delete(nai.network.netId); 2150 } 2151 // Just in case. 2152 mLegacyTypeTracker.remove(nai, wasDefault); 2153 } 2154 } 2155 } 2156 } 2157 2158 private void handleAsyncChannelDisconnected(Message msg) { 2159 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2160 if (nai != null) { 2161 if (DBG) { 2162 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2163 } 2164 // A network agent has disconnected. 2165 // TODO - if we move the logic to the network agent (have them disconnect 2166 // because they lost all their requests or because their score isn't good) 2167 // then they would disconnect organically, report their new state and then 2168 // disconnect the channel. 2169 if (nai.networkInfo.isConnected()) { 2170 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2171 null, null); 2172 } 2173 final boolean wasDefault = isDefaultNetwork(nai); 2174 if (wasDefault) { 2175 mDefaultInetConditionPublished = 0; 2176 } 2177 notifyIfacesChanged(); 2178 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2179 // by other networks that are already connected. Perhaps that can be done by 2180 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2181 // of rematchAllNetworksAndRequests 2182 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2183 mKeepaliveTracker.handleStopAllKeepalives(nai, 2184 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2185 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2186 mNetworkAgentInfos.remove(msg.replyTo); 2187 updateClat(null, nai.linkProperties, nai); 2188 synchronized (mNetworkForNetId) { 2189 // Remove the NetworkAgent, but don't mark the netId as 2190 // available until we've told netd to delete it below. 2191 mNetworkForNetId.remove(nai.network.netId); 2192 } 2193 // Remove all previously satisfied requests. 2194 for (int i = 0; i < nai.networkRequests.size(); i++) { 2195 NetworkRequest request = nai.networkRequests.valueAt(i); 2196 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2197 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2198 mNetworkForRequestId.remove(request.requestId); 2199 sendUpdatedScoreToFactories(request, 0); 2200 } 2201 } 2202 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2203 removeDataActivityTracking(nai); 2204 notifyLockdownVpn(nai); 2205 requestNetworkTransitionWakelock(nai.name()); 2206 } 2207 mLegacyTypeTracker.remove(nai, wasDefault); 2208 rematchAllNetworksAndRequests(null, 0); 2209 if (nai.created) { 2210 // Tell netd to clean up the configuration for this network 2211 // (routing rules, DNS, etc). 2212 // This may be slow as it requires a lot of netd shelling out to ip and 2213 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2214 // after we've rematched networks with requests which should make a potential 2215 // fallback network the default or requested a new network from the 2216 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2217 // long time. 2218 try { 2219 mNetd.removeNetwork(nai.network.netId); 2220 } catch (Exception e) { 2221 loge("Exception removing network: " + e); 2222 } 2223 } 2224 synchronized (mNetworkForNetId) { 2225 mNetIdInUse.delete(nai.network.netId); 2226 } 2227 } else { 2228 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2229 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2230 } 2231 } 2232 2233 // If this method proves to be too slow then we can maintain a separate 2234 // pendingIntent => NetworkRequestInfo map. 2235 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2236 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2237 Intent intent = pendingIntent.getIntent(); 2238 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2239 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2240 if (existingPendingIntent != null && 2241 existingPendingIntent.getIntent().filterEquals(intent)) { 2242 return entry.getValue(); 2243 } 2244 } 2245 return null; 2246 } 2247 2248 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2249 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2250 2251 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2252 if (existingRequest != null) { // remove the existing request. 2253 if (DBG) log("Replacing " + existingRequest.request + " with " 2254 + nri.request + " because their intents matched."); 2255 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2256 } 2257 handleRegisterNetworkRequest(nri); 2258 } 2259 2260 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2261 mNetworkRequests.put(nri.request, nri); 2262 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2263 if (!nri.isRequest) { 2264 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2265 if (network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2266 updateSignalStrengthThresholds(network); 2267 } 2268 } 2269 } 2270 rematchAllNetworksAndRequests(null, 0); 2271 if (nri.isRequest && mNetworkForRequestId.get(nri.request.requestId) == null) { 2272 sendUpdatedScoreToFactories(nri.request, 0); 2273 } 2274 } 2275 2276 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2277 int callingUid) { 2278 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2279 if (nri != null) { 2280 handleReleaseNetworkRequest(nri.request, callingUid); 2281 } 2282 } 2283 2284 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2285 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2286 // would it have a chance of satisfying any NetworkRequests. 2287 private boolean unneeded(NetworkAgentInfo nai) { 2288 if (!nai.created || nai.isVPN() || nai.lingering) return false; 2289 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2290 // If this Network is already the highest scoring Network for a request, or if 2291 // there is hope for it to become one if it validated, then it is needed. 2292 if (nri.isRequest && nai.satisfies(nri.request) && 2293 (nai.networkRequests.get(nri.request.requestId) != null || 2294 // Note that this catches two important cases: 2295 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2296 // is currently satisfying the request. This is desirable when 2297 // cellular ends up validating but WiFi does not. 2298 // 2. Unvalidated WiFi will not be reaped when validated cellular 2299 // is currently satisfying the request. This is desirable when 2300 // WiFi ends up validating and out scoring cellular. 2301 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2302 nai.getCurrentScoreAsValidated())) { 2303 return false; 2304 } 2305 } 2306 return true; 2307 } 2308 2309 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2310 NetworkRequestInfo nri = mNetworkRequests.get(request); 2311 if (nri != null) { 2312 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2313 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2314 return; 2315 } 2316 if (DBG) log("releasing NetworkRequest " + request); 2317 nri.unlinkDeathRecipient(); 2318 mNetworkRequests.remove(request); 2319 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2320 if (nri.isRequest) { 2321 // Find all networks that are satisfying this request and remove the request 2322 // from their request lists. 2323 // TODO - it's my understanding that for a request there is only a single 2324 // network satisfying it, so this loop is wasteful 2325 boolean wasKept = false; 2326 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2327 if (nai.networkRequests.get(nri.request.requestId) != null) { 2328 nai.networkRequests.remove(nri.request.requestId); 2329 if (DBG) { 2330 log(" Removing from current network " + nai.name() + 2331 ", leaving " + nai.networkRequests.size() + 2332 " requests."); 2333 } 2334 if (unneeded(nai)) { 2335 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2336 teardownUnneededNetwork(nai); 2337 } else { 2338 // suspect there should only be one pass through here 2339 // but if any were kept do the check below 2340 wasKept |= true; 2341 } 2342 } 2343 } 2344 2345 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2346 if (nai != null) { 2347 mNetworkForRequestId.remove(nri.request.requestId); 2348 } 2349 // Maintain the illusion. When this request arrived, we might have pretended 2350 // that a network connected to serve it, even though the network was already 2351 // connected. Now that this request has gone away, we might have to pretend 2352 // that the network disconnected. LegacyTypeTracker will generate that 2353 // phantom disconnect for this type. 2354 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2355 boolean doRemove = true; 2356 if (wasKept) { 2357 // check if any of the remaining requests for this network are for the 2358 // same legacy type - if so, don't remove the nai 2359 for (int i = 0; i < nai.networkRequests.size(); i++) { 2360 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2361 if (otherRequest.legacyType == nri.request.legacyType && 2362 isRequest(otherRequest)) { 2363 if (DBG) log(" still have other legacy request - leaving"); 2364 doRemove = false; 2365 } 2366 } 2367 } 2368 2369 if (doRemove) { 2370 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2371 } 2372 } 2373 2374 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2375 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2376 nri.request); 2377 } 2378 } else { 2379 // listens don't have a singular affectedNetwork. Check all networks to see 2380 // if this listen request applies and remove it. 2381 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2382 nai.networkRequests.remove(nri.request.requestId); 2383 if (nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2384 updateSignalStrengthThresholds(nai); 2385 } 2386 } 2387 } 2388 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2389 } 2390 } 2391 2392 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2393 enforceConnectivityInternalPermission(); 2394 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2395 accept ? 1 : 0, always ? 1: 0, network)); 2396 } 2397 2398 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2399 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2400 " accept=" + accept + " always=" + always); 2401 2402 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2403 if (nai == null) { 2404 // Nothing to do. 2405 return; 2406 } 2407 2408 if (nai.everValidated) { 2409 // The network validated while the dialog box was up. Take no action. 2410 return; 2411 } 2412 2413 if (!nai.networkMisc.explicitlySelected) { 2414 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2415 } 2416 2417 if (accept != nai.networkMisc.acceptUnvalidated) { 2418 int oldScore = nai.getCurrentScore(); 2419 nai.networkMisc.acceptUnvalidated = accept; 2420 rematchAllNetworksAndRequests(nai, oldScore); 2421 sendUpdatedScoreToFactories(nai); 2422 } 2423 2424 if (always) { 2425 nai.asyncChannel.sendMessage( 2426 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2427 } 2428 2429 if (!accept) { 2430 // Tell the NetworkAgent to not automatically reconnect to the network. 2431 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2432 // Teardown the nework. 2433 teardownUnneededNetwork(nai); 2434 } 2435 2436 } 2437 2438 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2439 if (DBG) log("scheduleUnvalidatedPrompt " + nai.network); 2440 mHandler.sendMessageDelayed( 2441 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2442 PROMPT_UNVALIDATED_DELAY_MS); 2443 } 2444 2445 private void handlePromptUnvalidated(Network network) { 2446 if (DBG) log("handlePromptUnvalidated " + network); 2447 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2448 2449 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2450 // we haven't already been told to switch to it regardless of whether it validated or not. 2451 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2452 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2453 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2454 return; 2455 } 2456 2457 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2458 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2459 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2460 intent.setClassName("com.android.settings", 2461 "com.android.settings.wifi.WifiNoInternetDialog"); 2462 2463 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2464 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2465 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2466 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2467 } 2468 2469 private class InternalHandler extends Handler { 2470 public InternalHandler(Looper looper) { 2471 super(looper); 2472 } 2473 2474 @Override 2475 public void handleMessage(Message msg) { 2476 switch (msg.what) { 2477 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2478 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2479 String causedBy = null; 2480 synchronized (ConnectivityService.this) { 2481 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2482 mNetTransitionWakeLock.isHeld()) { 2483 mNetTransitionWakeLock.release(); 2484 causedBy = mNetTransitionWakeLockCausedBy; 2485 } else { 2486 break; 2487 } 2488 } 2489 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2490 log("Failed to find a new network - expiring NetTransition Wakelock"); 2491 } else { 2492 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2493 " cleared because we found a replacement network"); 2494 } 2495 break; 2496 } 2497 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2498 handleDeprecatedGlobalHttpProxy(); 2499 break; 2500 } 2501 case EVENT_SEND_STICKY_BROADCAST_INTENT: { 2502 Intent intent = (Intent)msg.obj; 2503 sendStickyBroadcast(intent); 2504 break; 2505 } 2506 case EVENT_PROXY_HAS_CHANGED: { 2507 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2508 break; 2509 } 2510 case EVENT_REGISTER_NETWORK_FACTORY: { 2511 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2512 break; 2513 } 2514 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2515 handleUnregisterNetworkFactory((Messenger)msg.obj); 2516 break; 2517 } 2518 case EVENT_REGISTER_NETWORK_AGENT: { 2519 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2520 break; 2521 } 2522 case EVENT_REGISTER_NETWORK_REQUEST: 2523 case EVENT_REGISTER_NETWORK_LISTENER: { 2524 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2525 break; 2526 } 2527 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2528 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2529 handleRegisterNetworkRequestWithIntent(msg); 2530 break; 2531 } 2532 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2533 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2534 break; 2535 } 2536 case EVENT_RELEASE_NETWORK_REQUEST: { 2537 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2538 break; 2539 } 2540 case EVENT_SET_ACCEPT_UNVALIDATED: { 2541 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2542 break; 2543 } 2544 case EVENT_PROMPT_UNVALIDATED: { 2545 handlePromptUnvalidated((Network) msg.obj); 2546 break; 2547 } 2548 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2549 handleMobileDataAlwaysOn(); 2550 break; 2551 } 2552 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2553 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2554 mKeepaliveTracker.handleStartKeepalive(msg); 2555 break; 2556 } 2557 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2558 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2559 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2560 int slot = msg.arg1; 2561 int reason = msg.arg2; 2562 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2563 break; 2564 } 2565 case EVENT_SYSTEM_READY: { 2566 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2567 nai.networkMonitor.systemReady = true; 2568 } 2569 break; 2570 } 2571 } 2572 } 2573 } 2574 2575 // javadoc from interface 2576 public int tether(String iface) { 2577 ConnectivityManager.enforceTetherChangePermission(mContext); 2578 if (isTetheringSupported()) { 2579 return mTethering.tether(iface); 2580 } else { 2581 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2582 } 2583 } 2584 2585 // javadoc from interface 2586 public int untether(String iface) { 2587 ConnectivityManager.enforceTetherChangePermission(mContext); 2588 2589 if (isTetheringSupported()) { 2590 return mTethering.untether(iface); 2591 } else { 2592 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2593 } 2594 } 2595 2596 // javadoc from interface 2597 public int getLastTetherError(String iface) { 2598 enforceTetherAccessPermission(); 2599 2600 if (isTetheringSupported()) { 2601 return mTethering.getLastTetherError(iface); 2602 } else { 2603 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2604 } 2605 } 2606 2607 // TODO - proper iface API for selection by property, inspection, etc 2608 public String[] getTetherableUsbRegexs() { 2609 enforceTetherAccessPermission(); 2610 if (isTetheringSupported()) { 2611 return mTethering.getTetherableUsbRegexs(); 2612 } else { 2613 return new String[0]; 2614 } 2615 } 2616 2617 public String[] getTetherableWifiRegexs() { 2618 enforceTetherAccessPermission(); 2619 if (isTetheringSupported()) { 2620 return mTethering.getTetherableWifiRegexs(); 2621 } else { 2622 return new String[0]; 2623 } 2624 } 2625 2626 public String[] getTetherableBluetoothRegexs() { 2627 enforceTetherAccessPermission(); 2628 if (isTetheringSupported()) { 2629 return mTethering.getTetherableBluetoothRegexs(); 2630 } else { 2631 return new String[0]; 2632 } 2633 } 2634 2635 public int setUsbTethering(boolean enable) { 2636 ConnectivityManager.enforceTetherChangePermission(mContext); 2637 if (isTetheringSupported()) { 2638 return mTethering.setUsbTethering(enable); 2639 } else { 2640 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2641 } 2642 } 2643 2644 // TODO - move iface listing, queries, etc to new module 2645 // javadoc from interface 2646 public String[] getTetherableIfaces() { 2647 enforceTetherAccessPermission(); 2648 return mTethering.getTetherableIfaces(); 2649 } 2650 2651 public String[] getTetheredIfaces() { 2652 enforceTetherAccessPermission(); 2653 return mTethering.getTetheredIfaces(); 2654 } 2655 2656 public String[] getTetheringErroredIfaces() { 2657 enforceTetherAccessPermission(); 2658 return mTethering.getErroredIfaces(); 2659 } 2660 2661 public String[] getTetheredDhcpRanges() { 2662 enforceConnectivityInternalPermission(); 2663 return mTethering.getTetheredDhcpRanges(); 2664 } 2665 2666 // if ro.tether.denied = true we default to no tethering 2667 // gservices could set the secure setting to 1 though to enable it on a build where it 2668 // had previously been turned off. 2669 public boolean isTetheringSupported() { 2670 enforceTetherAccessPermission(); 2671 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2672 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2673 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2674 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2675 return tetherEnabledInSettings && ((mTethering.getTetherableUsbRegexs().length != 0 || 2676 mTethering.getTetherableWifiRegexs().length != 0 || 2677 mTethering.getTetherableBluetoothRegexs().length != 0) && 2678 mTethering.getUpstreamIfaceTypes().length != 0); 2679 } 2680 2681 // Called when we lose the default network and have no replacement yet. 2682 // This will automatically be cleared after X seconds or a new default network 2683 // becomes CONNECTED, whichever happens first. The timer is started by the 2684 // first caller and not restarted by subsequent callers. 2685 private void requestNetworkTransitionWakelock(String forWhom) { 2686 int serialNum = 0; 2687 synchronized (this) { 2688 if (mNetTransitionWakeLock.isHeld()) return; 2689 serialNum = ++mNetTransitionWakeLockSerialNumber; 2690 mNetTransitionWakeLock.acquire(); 2691 mNetTransitionWakeLockCausedBy = forWhom; 2692 } 2693 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2694 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2695 mNetTransitionWakeLockTimeout); 2696 return; 2697 } 2698 2699 // 100 percent is full good, 0 is full bad. 2700 public void reportInetCondition(int networkType, int percentage) { 2701 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2702 if (nai == null) return; 2703 reportNetworkConnectivity(nai.network, percentage > 50); 2704 } 2705 2706 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2707 enforceAccessPermission(); 2708 enforceInternetPermission(); 2709 2710 NetworkAgentInfo nai; 2711 if (network == null) { 2712 nai = getDefaultNetwork(); 2713 } else { 2714 nai = getNetworkAgentInfoForNetwork(network); 2715 } 2716 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2717 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2718 return; 2719 } 2720 // Revalidate if the app report does not match our current validated state. 2721 if (hasConnectivity == nai.lastValidated) return; 2722 final int uid = Binder.getCallingUid(); 2723 if (DBG) { 2724 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2725 ") by " + uid); 2726 } 2727 synchronized (nai) { 2728 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2729 // which isn't meant to work on uncreated networks. 2730 if (!nai.created) return; 2731 2732 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2733 2734 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2735 } 2736 } 2737 2738 private ProxyInfo getDefaultProxy() { 2739 // this information is already available as a world read/writable jvm property 2740 // so this API change wouldn't have a benifit. It also breaks the passing 2741 // of proxy info to all the JVMs. 2742 // enforceAccessPermission(); 2743 synchronized (mProxyLock) { 2744 ProxyInfo ret = mGlobalProxy; 2745 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2746 return ret; 2747 } 2748 } 2749 2750 public ProxyInfo getProxyForNetwork(Network network) { 2751 if (network == null) return getDefaultProxy(); 2752 final ProxyInfo globalProxy = getGlobalProxy(); 2753 if (globalProxy != null) return globalProxy; 2754 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 2755 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 2756 // caller may not have. 2757 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2758 if (nai == null) return null; 2759 synchronized (nai) { 2760 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 2761 if (proxyInfo == null) return null; 2762 return new ProxyInfo(proxyInfo); 2763 } 2764 } 2765 2766 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2767 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2768 // proxy is null then there is no proxy in place). 2769 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2770 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2771 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2772 proxy = null; 2773 } 2774 return proxy; 2775 } 2776 2777 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2778 // better for determining if a new proxy broadcast is necessary: 2779 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2780 // avoid unnecessary broadcasts. 2781 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2782 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2783 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2784 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2785 // all set. 2786 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2787 a = canonicalizeProxyInfo(a); 2788 b = canonicalizeProxyInfo(b); 2789 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2790 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2791 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2792 } 2793 2794 public void setGlobalProxy(ProxyInfo proxyProperties) { 2795 enforceConnectivityInternalPermission(); 2796 2797 synchronized (mProxyLock) { 2798 if (proxyProperties == mGlobalProxy) return; 2799 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2800 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2801 2802 String host = ""; 2803 int port = 0; 2804 String exclList = ""; 2805 String pacFileUrl = ""; 2806 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2807 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2808 if (!proxyProperties.isValid()) { 2809 if (DBG) 2810 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2811 return; 2812 } 2813 mGlobalProxy = new ProxyInfo(proxyProperties); 2814 host = mGlobalProxy.getHost(); 2815 port = mGlobalProxy.getPort(); 2816 exclList = mGlobalProxy.getExclusionListAsString(); 2817 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2818 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2819 } 2820 } else { 2821 mGlobalProxy = null; 2822 } 2823 ContentResolver res = mContext.getContentResolver(); 2824 final long token = Binder.clearCallingIdentity(); 2825 try { 2826 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2827 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2828 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2829 exclList); 2830 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2831 } finally { 2832 Binder.restoreCallingIdentity(token); 2833 } 2834 2835 if (mGlobalProxy == null) { 2836 proxyProperties = mDefaultProxy; 2837 } 2838 sendProxyBroadcast(proxyProperties); 2839 } 2840 } 2841 2842 private void loadGlobalProxy() { 2843 ContentResolver res = mContext.getContentResolver(); 2844 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2845 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2846 String exclList = Settings.Global.getString(res, 2847 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2848 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2849 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2850 ProxyInfo proxyProperties; 2851 if (!TextUtils.isEmpty(pacFileUrl)) { 2852 proxyProperties = new ProxyInfo(pacFileUrl); 2853 } else { 2854 proxyProperties = new ProxyInfo(host, port, exclList); 2855 } 2856 if (!proxyProperties.isValid()) { 2857 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2858 return; 2859 } 2860 2861 synchronized (mProxyLock) { 2862 mGlobalProxy = proxyProperties; 2863 } 2864 } 2865 } 2866 2867 public ProxyInfo getGlobalProxy() { 2868 // this information is already available as a world read/writable jvm property 2869 // so this API change wouldn't have a benifit. It also breaks the passing 2870 // of proxy info to all the JVMs. 2871 // enforceAccessPermission(); 2872 synchronized (mProxyLock) { 2873 return mGlobalProxy; 2874 } 2875 } 2876 2877 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2878 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2879 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2880 proxy = null; 2881 } 2882 synchronized (mProxyLock) { 2883 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2884 if (mDefaultProxy == proxy) return; // catches repeated nulls 2885 if (proxy != null && !proxy.isValid()) { 2886 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2887 return; 2888 } 2889 2890 // This call could be coming from the PacManager, containing the port of the local 2891 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2892 // global (to get the correct local port), and send a broadcast. 2893 // TODO: Switch PacManager to have its own message to send back rather than 2894 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2895 if ((mGlobalProxy != null) && (proxy != null) 2896 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2897 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2898 mGlobalProxy = proxy; 2899 sendProxyBroadcast(mGlobalProxy); 2900 return; 2901 } 2902 mDefaultProxy = proxy; 2903 2904 if (mGlobalProxy != null) return; 2905 if (!mDefaultProxyDisabled) { 2906 sendProxyBroadcast(proxy); 2907 } 2908 } 2909 } 2910 2911 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2912 // This method gets called when any network changes proxy, but the broadcast only ever contains 2913 // the default proxy (even if it hasn't changed). 2914 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2915 // world where an app might be bound to a non-default network. 2916 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2917 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2918 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2919 2920 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2921 sendProxyBroadcast(getDefaultProxy()); 2922 } 2923 } 2924 2925 private void handleDeprecatedGlobalHttpProxy() { 2926 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2927 Settings.Global.HTTP_PROXY); 2928 if (!TextUtils.isEmpty(proxy)) { 2929 String data[] = proxy.split(":"); 2930 if (data.length == 0) { 2931 return; 2932 } 2933 2934 String proxyHost = data[0]; 2935 int proxyPort = 8080; 2936 if (data.length > 1) { 2937 try { 2938 proxyPort = Integer.parseInt(data[1]); 2939 } catch (NumberFormatException e) { 2940 return; 2941 } 2942 } 2943 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2944 setGlobalProxy(p); 2945 } 2946 } 2947 2948 private void sendProxyBroadcast(ProxyInfo proxy) { 2949 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2950 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2951 if (DBG) log("sending Proxy Broadcast for " + proxy); 2952 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2953 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2954 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2955 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2956 final long ident = Binder.clearCallingIdentity(); 2957 try { 2958 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2959 } finally { 2960 Binder.restoreCallingIdentity(ident); 2961 } 2962 } 2963 2964 private static class SettingsObserver extends ContentObserver { 2965 final private HashMap<Uri, Integer> mUriEventMap; 2966 final private Context mContext; 2967 final private Handler mHandler; 2968 2969 SettingsObserver(Context context, Handler handler) { 2970 super(null); 2971 mUriEventMap = new HashMap<Uri, Integer>(); 2972 mContext = context; 2973 mHandler = handler; 2974 } 2975 2976 void observe(Uri uri, int what) { 2977 mUriEventMap.put(uri, what); 2978 final ContentResolver resolver = mContext.getContentResolver(); 2979 resolver.registerContentObserver(uri, false, this); 2980 } 2981 2982 @Override 2983 public void onChange(boolean selfChange) { 2984 Slog.wtf(TAG, "Should never be reached."); 2985 } 2986 2987 @Override 2988 public void onChange(boolean selfChange, Uri uri) { 2989 final Integer what = mUriEventMap.get(uri); 2990 if (what != null) { 2991 mHandler.obtainMessage(what.intValue()).sendToTarget(); 2992 } else { 2993 loge("No matching event to send for URI=" + uri); 2994 } 2995 } 2996 } 2997 2998 private static void log(String s) { 2999 Slog.d(TAG, s); 3000 } 3001 3002 private static void loge(String s) { 3003 Slog.e(TAG, s); 3004 } 3005 3006 private static <T> T checkNotNull(T value, String message) { 3007 if (value == null) { 3008 throw new NullPointerException(message); 3009 } 3010 return value; 3011 } 3012 3013 /** 3014 * Prepare for a VPN application. 3015 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3016 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3017 * 3018 * @param oldPackage Package name of the application which currently controls VPN, which will 3019 * be replaced. If there is no such application, this should should either be 3020 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3021 * @param newPackage Package name of the application which should gain control of VPN, or 3022 * {@code null} to disable. 3023 * @param userId User for whom to prepare the new VPN. 3024 * 3025 * @hide 3026 */ 3027 @Override 3028 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3029 int userId) { 3030 enforceCrossUserPermission(userId); 3031 throwIfLockdownEnabled(); 3032 3033 synchronized(mVpns) { 3034 Vpn vpn = mVpns.get(userId); 3035 if (vpn != null) { 3036 return vpn.prepare(oldPackage, newPackage); 3037 } else { 3038 return false; 3039 } 3040 } 3041 } 3042 3043 /** 3044 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3045 * This method is used by system-privileged apps. 3046 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3047 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3048 * 3049 * @param packageName The package for which authorization state should change. 3050 * @param userId User for whom {@code packageName} is installed. 3051 * @param authorized {@code true} if this app should be able to start a VPN connection without 3052 * explicit user approval, {@code false} if not. 3053 * 3054 * @hide 3055 */ 3056 @Override 3057 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3058 enforceCrossUserPermission(userId); 3059 3060 synchronized(mVpns) { 3061 Vpn vpn = mVpns.get(userId); 3062 if (vpn != null) { 3063 vpn.setPackageAuthorization(packageName, authorized); 3064 } 3065 } 3066 } 3067 3068 /** 3069 * Configure a TUN interface and return its file descriptor. Parameters 3070 * are encoded and opaque to this class. This method is used by VpnBuilder 3071 * and not available in ConnectivityManager. Permissions are checked in 3072 * Vpn class. 3073 * @hide 3074 */ 3075 @Override 3076 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3077 throwIfLockdownEnabled(); 3078 int user = UserHandle.getUserId(Binder.getCallingUid()); 3079 synchronized(mVpns) { 3080 return mVpns.get(user).establish(config); 3081 } 3082 } 3083 3084 /** 3085 * Start legacy VPN, controlling native daemons as needed. Creates a 3086 * secondary thread to perform connection work, returning quickly. 3087 */ 3088 @Override 3089 public void startLegacyVpn(VpnProfile profile) { 3090 throwIfLockdownEnabled(); 3091 final LinkProperties egress = getActiveLinkProperties(); 3092 if (egress == null) { 3093 throw new IllegalStateException("Missing active network connection"); 3094 } 3095 int user = UserHandle.getUserId(Binder.getCallingUid()); 3096 synchronized(mVpns) { 3097 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3098 } 3099 } 3100 3101 /** 3102 * Return the information of the ongoing legacy VPN. This method is used 3103 * by VpnSettings and not available in ConnectivityManager. Permissions 3104 * are checked in Vpn class. 3105 */ 3106 @Override 3107 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3108 enforceCrossUserPermission(userId); 3109 if (mLockdownEnabled) { 3110 return null; 3111 } 3112 3113 synchronized(mVpns) { 3114 return mVpns.get(userId).getLegacyVpnInfo(); 3115 } 3116 } 3117 3118 /** 3119 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3120 * and not available in ConnectivityManager. 3121 */ 3122 @Override 3123 public VpnInfo[] getAllVpnInfo() { 3124 enforceConnectivityInternalPermission(); 3125 if (mLockdownEnabled) { 3126 return new VpnInfo[0]; 3127 } 3128 3129 synchronized(mVpns) { 3130 List<VpnInfo> infoList = new ArrayList<>(); 3131 for (int i = 0; i < mVpns.size(); i++) { 3132 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3133 if (info != null) { 3134 infoList.add(info); 3135 } 3136 } 3137 return infoList.toArray(new VpnInfo[infoList.size()]); 3138 } 3139 } 3140 3141 /** 3142 * @return VPN information for accounting, or null if we can't retrieve all required 3143 * information, e.g primary underlying iface. 3144 */ 3145 @Nullable 3146 private VpnInfo createVpnInfo(Vpn vpn) { 3147 VpnInfo info = vpn.getVpnInfo(); 3148 if (info == null) { 3149 return null; 3150 } 3151 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3152 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3153 // the underlyingNetworks list. 3154 if (underlyingNetworks == null) { 3155 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3156 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3157 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3158 } 3159 } else if (underlyingNetworks.length > 0) { 3160 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3161 if (linkProperties != null) { 3162 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3163 } 3164 } 3165 return info.primaryUnderlyingIface == null ? null : info; 3166 } 3167 3168 /** 3169 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3170 * VpnDialogs and not available in ConnectivityManager. 3171 * Permissions are checked in Vpn class. 3172 * @hide 3173 */ 3174 @Override 3175 public VpnConfig getVpnConfig(int userId) { 3176 enforceCrossUserPermission(userId); 3177 synchronized(mVpns) { 3178 Vpn vpn = mVpns.get(userId); 3179 if (vpn != null) { 3180 return vpn.getVpnConfig(); 3181 } else { 3182 return null; 3183 } 3184 } 3185 } 3186 3187 @Override 3188 public boolean updateLockdownVpn() { 3189 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3190 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3191 return false; 3192 } 3193 3194 // Tear down existing lockdown if profile was removed 3195 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3196 if (mLockdownEnabled) { 3197 if (!mKeyStore.isUnlocked()) { 3198 Slog.w(TAG, "KeyStore locked; unable to create LockdownTracker"); 3199 return false; 3200 } 3201 3202 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3203 final VpnProfile profile = VpnProfile.decode( 3204 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3205 int user = UserHandle.getUserId(Binder.getCallingUid()); 3206 synchronized(mVpns) { 3207 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, mVpns.get(user), 3208 profile)); 3209 } 3210 } else { 3211 setLockdownTracker(null); 3212 } 3213 3214 return true; 3215 } 3216 3217 /** 3218 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3219 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3220 */ 3221 private void setLockdownTracker(LockdownVpnTracker tracker) { 3222 // Shutdown any existing tracker 3223 final LockdownVpnTracker existing = mLockdownTracker; 3224 mLockdownTracker = null; 3225 if (existing != null) { 3226 existing.shutdown(); 3227 } 3228 3229 try { 3230 if (tracker != null) { 3231 mNetd.setFirewallEnabled(true); 3232 mNetd.setFirewallInterfaceRule("lo", true); 3233 mLockdownTracker = tracker; 3234 mLockdownTracker.init(); 3235 } else { 3236 mNetd.setFirewallEnabled(false); 3237 } 3238 } catch (RemoteException e) { 3239 // ignored; NMS lives inside system_server 3240 } 3241 } 3242 3243 private void throwIfLockdownEnabled() { 3244 if (mLockdownEnabled) { 3245 throw new IllegalStateException("Unavailable in lockdown mode"); 3246 } 3247 } 3248 3249 @Override 3250 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3251 // TODO: Remove? Any reason to trigger a provisioning check? 3252 return -1; 3253 } 3254 3255 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3256 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3257 3258 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3259 if (DBG) { 3260 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3261 + " action=" + action); 3262 } 3263 Intent intent = new Intent(action); 3264 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3265 // Concatenate the range of types onto the range of NetIDs. 3266 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3267 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3268 networkType, null, pendingIntent, false); 3269 } 3270 3271 /** 3272 * Show or hide network provisioning notifications. 3273 * 3274 * We use notifications for two purposes: to notify that a network requires sign in 3275 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3276 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3277 * particular network we can display the notification type that was most recently requested. 3278 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3279 * might first display NO_INTERNET, and then when the captive portal check completes, display 3280 * SIGN_IN. 3281 * 3282 * @param id an identifier that uniquely identifies this notification. This must match 3283 * between show and hide calls. We use the NetID value but for legacy callers 3284 * we concatenate the range of types with the range of NetIDs. 3285 */ 3286 private void setProvNotificationVisibleIntent(boolean visible, int id, 3287 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3288 boolean highPriority) { 3289 if (DBG) { 3290 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3291 + " networkType=" + getNetworkTypeName(networkType) 3292 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3293 } 3294 3295 Resources r = Resources.getSystem(); 3296 NotificationManager notificationManager = (NotificationManager) mContext 3297 .getSystemService(Context.NOTIFICATION_SERVICE); 3298 3299 if (visible) { 3300 CharSequence title; 3301 CharSequence details; 3302 int icon; 3303 if (notifyType == NotificationType.NO_INTERNET && 3304 networkType == ConnectivityManager.TYPE_WIFI) { 3305 title = r.getString(R.string.wifi_no_internet, 0); 3306 details = r.getString(R.string.wifi_no_internet_detailed); 3307 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3308 } else if (notifyType == NotificationType.SIGN_IN) { 3309 switch (networkType) { 3310 case ConnectivityManager.TYPE_WIFI: 3311 title = r.getString(R.string.wifi_available_sign_in, 0); 3312 details = r.getString(R.string.network_available_sign_in_detailed, 3313 extraInfo); 3314 icon = R.drawable.stat_notify_wifi_in_range; 3315 break; 3316 case ConnectivityManager.TYPE_MOBILE: 3317 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3318 title = r.getString(R.string.network_available_sign_in, 0); 3319 // TODO: Change this to pull from NetworkInfo once a printable 3320 // name has been added to it 3321 details = mTelephonyManager.getNetworkOperatorName(); 3322 icon = R.drawable.stat_notify_rssi_in_range; 3323 break; 3324 default: 3325 title = r.getString(R.string.network_available_sign_in, 0); 3326 details = r.getString(R.string.network_available_sign_in_detailed, 3327 extraInfo); 3328 icon = R.drawable.stat_notify_rssi_in_range; 3329 break; 3330 } 3331 } else { 3332 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3333 + getNetworkTypeName(networkType)); 3334 return; 3335 } 3336 3337 Notification notification = new Notification.Builder(mContext) 3338 .setWhen(0) 3339 .setSmallIcon(icon) 3340 .setAutoCancel(true) 3341 .setTicker(title) 3342 .setColor(mContext.getColor( 3343 com.android.internal.R.color.system_notification_accent_color)) 3344 .setContentTitle(title) 3345 .setContentText(details) 3346 .setContentIntent(intent) 3347 .setLocalOnly(true) 3348 .setPriority(highPriority ? 3349 Notification.PRIORITY_HIGH : 3350 Notification.PRIORITY_DEFAULT) 3351 .setDefaults(Notification.DEFAULT_ALL) 3352 .setOnlyAlertOnce(true) 3353 .build(); 3354 3355 try { 3356 notificationManager.notify(NOTIFICATION_ID, id, notification); 3357 } catch (NullPointerException npe) { 3358 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3359 npe.printStackTrace(); 3360 } 3361 } else { 3362 try { 3363 notificationManager.cancel(NOTIFICATION_ID, id); 3364 } catch (NullPointerException npe) { 3365 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3366 npe.printStackTrace(); 3367 } 3368 } 3369 } 3370 3371 /** Location to an updatable file listing carrier provisioning urls. 3372 * An example: 3373 * 3374 * <?xml version="1.0" encoding="utf-8"?> 3375 * <provisioningUrls> 3376 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3377 * </provisioningUrls> 3378 */ 3379 private static final String PROVISIONING_URL_PATH = 3380 "/data/misc/radio/provisioning_urls.xml"; 3381 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3382 3383 /** XML tag for root element. */ 3384 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3385 /** XML tag for individual url */ 3386 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3387 /** XML attribute for mcc */ 3388 private static final String ATTR_MCC = "mcc"; 3389 /** XML attribute for mnc */ 3390 private static final String ATTR_MNC = "mnc"; 3391 3392 private String getProvisioningUrlBaseFromFile() { 3393 FileReader fileReader = null; 3394 XmlPullParser parser = null; 3395 Configuration config = mContext.getResources().getConfiguration(); 3396 3397 try { 3398 fileReader = new FileReader(mProvisioningUrlFile); 3399 parser = Xml.newPullParser(); 3400 parser.setInput(fileReader); 3401 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3402 3403 while (true) { 3404 XmlUtils.nextElement(parser); 3405 3406 String element = parser.getName(); 3407 if (element == null) break; 3408 3409 if (element.equals(TAG_PROVISIONING_URL)) { 3410 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3411 try { 3412 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3413 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3414 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3415 parser.next(); 3416 if (parser.getEventType() == XmlPullParser.TEXT) { 3417 return parser.getText(); 3418 } 3419 } 3420 } 3421 } catch (NumberFormatException e) { 3422 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3423 } 3424 } 3425 } 3426 return null; 3427 } catch (FileNotFoundException e) { 3428 loge("Carrier Provisioning Urls file not found"); 3429 } catch (XmlPullParserException e) { 3430 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3431 } catch (IOException e) { 3432 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3433 } finally { 3434 if (fileReader != null) { 3435 try { 3436 fileReader.close(); 3437 } catch (IOException e) {} 3438 } 3439 } 3440 return null; 3441 } 3442 3443 @Override 3444 public String getMobileProvisioningUrl() { 3445 enforceConnectivityInternalPermission(); 3446 String url = getProvisioningUrlBaseFromFile(); 3447 if (TextUtils.isEmpty(url)) { 3448 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3449 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3450 } else { 3451 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3452 } 3453 // populate the iccid, imei and phone number in the provisioning url. 3454 if (!TextUtils.isEmpty(url)) { 3455 String phoneNumber = mTelephonyManager.getLine1Number(); 3456 if (TextUtils.isEmpty(phoneNumber)) { 3457 phoneNumber = "0000000000"; 3458 } 3459 url = String.format(url, 3460 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3461 mTelephonyManager.getDeviceId() /* IMEI */, 3462 phoneNumber /* Phone numer */); 3463 } 3464 3465 return url; 3466 } 3467 3468 @Override 3469 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3470 String action) { 3471 enforceConnectivityInternalPermission(); 3472 final long ident = Binder.clearCallingIdentity(); 3473 try { 3474 setProvNotificationVisible(visible, networkType, action); 3475 } finally { 3476 Binder.restoreCallingIdentity(ident); 3477 } 3478 } 3479 3480 @Override 3481 public void setAirplaneMode(boolean enable) { 3482 enforceConnectivityInternalPermission(); 3483 final long ident = Binder.clearCallingIdentity(); 3484 try { 3485 final ContentResolver cr = mContext.getContentResolver(); 3486 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3487 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3488 intent.putExtra("state", enable); 3489 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3490 } finally { 3491 Binder.restoreCallingIdentity(ident); 3492 } 3493 } 3494 3495 private void onUserStart(int userId) { 3496 synchronized(mVpns) { 3497 Vpn userVpn = mVpns.get(userId); 3498 if (userVpn != null) { 3499 loge("Starting user already has a VPN"); 3500 return; 3501 } 3502 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3503 mVpns.put(userId, userVpn); 3504 } 3505 } 3506 3507 private void onUserStop(int userId) { 3508 synchronized(mVpns) { 3509 Vpn userVpn = mVpns.get(userId); 3510 if (userVpn == null) { 3511 loge("Stopping user has no VPN"); 3512 return; 3513 } 3514 mVpns.delete(userId); 3515 } 3516 } 3517 3518 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3519 @Override 3520 public void onReceive(Context context, Intent intent) { 3521 final String action = intent.getAction(); 3522 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3523 if (userId == UserHandle.USER_NULL) return; 3524 3525 if (Intent.ACTION_USER_STARTING.equals(action)) { 3526 onUserStart(userId); 3527 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3528 onUserStop(userId); 3529 } 3530 } 3531 }; 3532 3533 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3534 new HashMap<Messenger, NetworkFactoryInfo>(); 3535 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3536 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3537 3538 private static class NetworkFactoryInfo { 3539 public final String name; 3540 public final Messenger messenger; 3541 public final AsyncChannel asyncChannel; 3542 3543 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3544 this.name = name; 3545 this.messenger = messenger; 3546 this.asyncChannel = asyncChannel; 3547 } 3548 } 3549 3550 /** 3551 * Tracks info about the requester. 3552 * Also used to notice when the calling process dies so we can self-expire 3553 */ 3554 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3555 static final boolean REQUEST = true; 3556 static final boolean LISTEN = false; 3557 3558 final NetworkRequest request; 3559 final PendingIntent mPendingIntent; 3560 boolean mPendingIntentSent; 3561 private final IBinder mBinder; 3562 final int mPid; 3563 final int mUid; 3564 final Messenger messenger; 3565 final boolean isRequest; 3566 3567 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, boolean isRequest) { 3568 request = r; 3569 mPendingIntent = pi; 3570 messenger = null; 3571 mBinder = null; 3572 mPid = getCallingPid(); 3573 mUid = getCallingUid(); 3574 this.isRequest = isRequest; 3575 } 3576 3577 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, boolean isRequest) { 3578 super(); 3579 messenger = m; 3580 request = r; 3581 mBinder = binder; 3582 mPid = getCallingPid(); 3583 mUid = getCallingUid(); 3584 this.isRequest = isRequest; 3585 mPendingIntent = null; 3586 3587 try { 3588 mBinder.linkToDeath(this, 0); 3589 } catch (RemoteException e) { 3590 binderDied(); 3591 } 3592 } 3593 3594 void unlinkDeathRecipient() { 3595 if (mBinder != null) { 3596 mBinder.unlinkToDeath(this, 0); 3597 } 3598 } 3599 3600 public void binderDied() { 3601 log("ConnectivityService NetworkRequestInfo binderDied(" + 3602 request + ", " + mBinder + ")"); 3603 releaseNetworkRequest(request); 3604 } 3605 3606 public String toString() { 3607 return (isRequest ? "Request" : "Listen") + 3608 " from uid/pid:" + mUid + "/" + mPid + 3609 " for " + request + 3610 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3611 } 3612 } 3613 3614 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3615 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3616 if (badCapability != null) { 3617 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3618 } 3619 } 3620 3621 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3622 final SortedSet<Integer> thresholds = new TreeSet(); 3623 synchronized (nai) { 3624 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3625 if (nri.request.networkCapabilities.hasSignalStrength() && 3626 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3627 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3628 } 3629 } 3630 } 3631 return new ArrayList<Integer>(thresholds); 3632 } 3633 3634 private void updateSignalStrengthThresholds(NetworkAgentInfo nai) { 3635 Bundle thresholds = new Bundle(); 3636 thresholds.putIntegerArrayList("thresholds", getSignalStrengthThresholds(nai)); 3637 nai.asyncChannel.sendMessage( 3638 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3639 0, 0, thresholds); 3640 } 3641 3642 @Override 3643 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3644 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3645 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3646 enforceNetworkRequestPermissions(networkCapabilities); 3647 enforceMeteredApnPolicy(networkCapabilities); 3648 ensureRequestableCapabilities(networkCapabilities); 3649 3650 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3651 throw new IllegalArgumentException("Bad timeout specified"); 3652 } 3653 3654 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3655 nextNetworkRequestId()); 3656 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3657 NetworkRequestInfo.REQUEST); 3658 if (DBG) log("requestNetwork for " + nri); 3659 3660 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3661 if (timeoutMs > 0) { 3662 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3663 nri), timeoutMs); 3664 } 3665 return networkRequest; 3666 } 3667 3668 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3669 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 3670 enforceConnectivityInternalPermission(); 3671 } else { 3672 enforceChangePermission(); 3673 } 3674 } 3675 3676 @Override 3677 public boolean requestBandwidthUpdate(Network network) { 3678 enforceAccessPermission(); 3679 NetworkAgentInfo nai = null; 3680 if (network == null) { 3681 return false; 3682 } 3683 synchronized (mNetworkForNetId) { 3684 nai = mNetworkForNetId.get(network.netId); 3685 } 3686 if (nai != null) { 3687 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3688 return true; 3689 } 3690 return false; 3691 } 3692 3693 3694 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3695 // if UID is restricted, don't allow them to bring up metered APNs 3696 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 3697 final int uidRules; 3698 final int uid = Binder.getCallingUid(); 3699 synchronized(mRulesLock) { 3700 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3701 } 3702 if ((uidRules & (RULE_REJECT_METERED | RULE_REJECT_ALL)) != 0) { 3703 // we could silently fail or we can filter the available nets to only give 3704 // them those they have access to. Chose the more useful 3705 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 3706 } 3707 } 3708 } 3709 3710 @Override 3711 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3712 PendingIntent operation) { 3713 checkNotNull(operation, "PendingIntent cannot be null."); 3714 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3715 enforceNetworkRequestPermissions(networkCapabilities); 3716 enforceMeteredApnPolicy(networkCapabilities); 3717 ensureRequestableCapabilities(networkCapabilities); 3718 3719 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3720 nextNetworkRequestId()); 3721 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3722 NetworkRequestInfo.REQUEST); 3723 if (DBG) log("pendingRequest for " + nri); 3724 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3725 nri)); 3726 return networkRequest; 3727 } 3728 3729 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3730 mHandler.sendMessageDelayed( 3731 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3732 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3733 } 3734 3735 @Override 3736 public void releasePendingNetworkRequest(PendingIntent operation) { 3737 checkNotNull(operation, "PendingIntent cannot be null."); 3738 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3739 getCallingUid(), 0, operation)); 3740 } 3741 3742 // In order to implement the compatibility measure for pre-M apps that call 3743 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 3744 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 3745 // This ensures it has permission to do so. 3746 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 3747 if (nc == null) { 3748 return false; 3749 } 3750 int[] transportTypes = nc.getTransportTypes(); 3751 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 3752 return false; 3753 } 3754 try { 3755 mContext.enforceCallingOrSelfPermission( 3756 android.Manifest.permission.ACCESS_WIFI_STATE, 3757 "ConnectivityService"); 3758 } catch (SecurityException e) { 3759 return false; 3760 } 3761 return true; 3762 } 3763 3764 @Override 3765 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 3766 Messenger messenger, IBinder binder) { 3767 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3768 enforceAccessPermission(); 3769 } 3770 3771 NetworkRequest networkRequest = new NetworkRequest( 3772 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3773 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3774 NetworkRequestInfo.LISTEN); 3775 if (DBG) log("listenForNetwork for " + nri); 3776 3777 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3778 return networkRequest; 3779 } 3780 3781 @Override 3782 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 3783 PendingIntent operation) { 3784 checkNotNull(operation, "PendingIntent cannot be null."); 3785 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3786 enforceAccessPermission(); 3787 } 3788 3789 NetworkRequest networkRequest = new NetworkRequest( 3790 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3791 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3792 NetworkRequestInfo.LISTEN); 3793 if (DBG) log("pendingListenForNetwork for " + nri); 3794 3795 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3796 } 3797 3798 @Override 3799 public void releaseNetworkRequest(NetworkRequest networkRequest) { 3800 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 3801 0, networkRequest)); 3802 } 3803 3804 @Override 3805 public void registerNetworkFactory(Messenger messenger, String name) { 3806 enforceConnectivityInternalPermission(); 3807 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 3808 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 3809 } 3810 3811 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 3812 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 3813 mNetworkFactoryInfos.put(nfi.messenger, nfi); 3814 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 3815 } 3816 3817 @Override 3818 public void unregisterNetworkFactory(Messenger messenger) { 3819 enforceConnectivityInternalPermission(); 3820 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 3821 } 3822 3823 private void handleUnregisterNetworkFactory(Messenger messenger) { 3824 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 3825 if (nfi == null) { 3826 loge("Failed to find Messenger in unregisterNetworkFactory"); 3827 return; 3828 } 3829 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 3830 } 3831 3832 /** 3833 * NetworkAgentInfo supporting a request by requestId. 3834 * These have already been vetted (their Capabilities satisfy the request) 3835 * and the are the highest scored network available. 3836 * the are keyed off the Requests requestId. 3837 */ 3838 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 3839 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 3840 new SparseArray<NetworkAgentInfo>(); 3841 3842 // NOTE: Accessed on multiple threads, must be synchronized on itself. 3843 @GuardedBy("mNetworkForNetId") 3844 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 3845 new SparseArray<NetworkAgentInfo>(); 3846 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 3847 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 3848 // there may not be a strict 1:1 correlation between the two. 3849 @GuardedBy("mNetworkForNetId") 3850 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 3851 3852 // NetworkAgentInfo keyed off its connecting messenger 3853 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 3854 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 3855 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 3856 new HashMap<Messenger, NetworkAgentInfo>(); 3857 3858 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 3859 private final NetworkRequest mDefaultRequest; 3860 3861 // Request used to optionally keep mobile data active even when higher 3862 // priority networks like Wi-Fi are active. 3863 private final NetworkRequest mDefaultMobileDataRequest; 3864 3865 private NetworkAgentInfo getDefaultNetwork() { 3866 return mNetworkForRequestId.get(mDefaultRequest.requestId); 3867 } 3868 3869 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 3870 return nai == getDefaultNetwork(); 3871 } 3872 3873 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 3874 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 3875 int currentScore, NetworkMisc networkMisc) { 3876 enforceConnectivityInternalPermission(); 3877 3878 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 3879 // satisfies mDefaultRequest. 3880 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 3881 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 3882 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 3883 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 3884 synchronized (this) { 3885 nai.networkMonitor.systemReady = mSystemReady; 3886 } 3887 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network); 3888 if (DBG) log("registerNetworkAgent " + nai); 3889 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 3890 return nai.network.netId; 3891 } 3892 3893 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 3894 if (VDBG) log("Got NetworkAgent Messenger"); 3895 mNetworkAgentInfos.put(na.messenger, na); 3896 synchronized (mNetworkForNetId) { 3897 mNetworkForNetId.put(na.network.netId, na); 3898 } 3899 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 3900 NetworkInfo networkInfo = na.networkInfo; 3901 na.networkInfo = null; 3902 updateNetworkInfo(na, networkInfo); 3903 } 3904 3905 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 3906 LinkProperties newLp = networkAgent.linkProperties; 3907 int netId = networkAgent.network.netId; 3908 3909 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 3910 // we do anything else, make sure its LinkProperties are accurate. 3911 if (networkAgent.clatd != null) { 3912 networkAgent.clatd.fixupLinkProperties(oldLp); 3913 } 3914 3915 updateInterfaces(newLp, oldLp, netId); 3916 updateMtu(newLp, oldLp); 3917 // TODO - figure out what to do for clat 3918// for (LinkProperties lp : newLp.getStackedLinks()) { 3919// updateMtu(lp, null); 3920// } 3921 updateTcpBufferSizes(networkAgent); 3922 3923 // TODO: deprecate and remove mDefaultDns when we can do so safely. See http://b/18327075 3924 // In L, we used it only when the network had Internet access but provided no DNS servers. 3925 // For now, just disable it, and if disabling it doesn't break things, remove it. 3926 // final boolean useDefaultDns = networkAgent.networkCapabilities.hasCapability( 3927 // NET_CAPABILITY_INTERNET); 3928 final boolean useDefaultDns = false; 3929 final boolean flushDns = updateRoutes(newLp, oldLp, netId); 3930 updateDnses(newLp, oldLp, netId, flushDns, useDefaultDns); 3931 3932 updateClat(newLp, oldLp, networkAgent); 3933 if (isDefaultNetwork(networkAgent)) { 3934 handleApplyDefaultProxy(newLp.getHttpProxy()); 3935 } else { 3936 updateProxy(newLp, oldLp, networkAgent); 3937 } 3938 // TODO - move this check to cover the whole function 3939 if (!Objects.equals(newLp, oldLp)) { 3940 notifyIfacesChanged(); 3941 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 3942 } 3943 3944 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 3945 } 3946 3947 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3948 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 3949 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 3950 3951 if (!wasRunningClat && shouldRunClat) { 3952 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 3953 nai.clatd.start(); 3954 } else if (wasRunningClat && !shouldRunClat) { 3955 nai.clatd.stop(); 3956 } 3957 } 3958 3959 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 3960 CompareResult<String> interfaceDiff = new CompareResult<String>(); 3961 if (oldLp != null) { 3962 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 3963 } else if (newLp != null) { 3964 interfaceDiff.added = newLp.getAllInterfaceNames(); 3965 } 3966 for (String iface : interfaceDiff.added) { 3967 try { 3968 if (DBG) log("Adding iface " + iface + " to network " + netId); 3969 mNetd.addInterfaceToNetwork(iface, netId); 3970 } catch (Exception e) { 3971 loge("Exception adding interface: " + e); 3972 } 3973 } 3974 for (String iface : interfaceDiff.removed) { 3975 try { 3976 if (DBG) log("Removing iface " + iface + " from network " + netId); 3977 mNetd.removeInterfaceFromNetwork(iface, netId); 3978 } catch (Exception e) { 3979 loge("Exception removing interface: " + e); 3980 } 3981 } 3982 } 3983 3984 /** 3985 * Have netd update routes from oldLp to newLp. 3986 * @return true if routes changed between oldLp and newLp 3987 */ 3988 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 3989 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 3990 if (oldLp != null) { 3991 routeDiff = oldLp.compareAllRoutes(newLp); 3992 } else if (newLp != null) { 3993 routeDiff.added = newLp.getAllRoutes(); 3994 } 3995 3996 // add routes before removing old in case it helps with continuous connectivity 3997 3998 // do this twice, adding non-nexthop routes first, then routes they are dependent on 3999 for (RouteInfo route : routeDiff.added) { 4000 if (route.hasGateway()) continue; 4001 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4002 try { 4003 mNetd.addRoute(netId, route); 4004 } catch (Exception e) { 4005 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4006 loge("Exception in addRoute for non-gateway: " + e); 4007 } 4008 } 4009 } 4010 for (RouteInfo route : routeDiff.added) { 4011 if (route.hasGateway() == false) continue; 4012 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4013 try { 4014 mNetd.addRoute(netId, route); 4015 } catch (Exception e) { 4016 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4017 loge("Exception in addRoute for gateway: " + e); 4018 } 4019 } 4020 } 4021 4022 for (RouteInfo route : routeDiff.removed) { 4023 if (DBG) log("Removing Route [" + route + "] from network " + netId); 4024 try { 4025 mNetd.removeRoute(netId, route); 4026 } catch (Exception e) { 4027 loge("Exception in removeRoute: " + e); 4028 } 4029 } 4030 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4031 } 4032 4033 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId, 4034 boolean flush, boolean useDefaultDns) { 4035 if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) { 4036 Collection<InetAddress> dnses = newLp.getDnsServers(); 4037 if (dnses.size() == 0 && mDefaultDns != null && useDefaultDns) { 4038 dnses = new ArrayList(); 4039 dnses.add(mDefaultDns); 4040 if (DBG) { 4041 loge("no dns provided for netId " + netId + ", so using defaults"); 4042 } 4043 } 4044 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 4045 try { 4046 mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses), 4047 newLp.getDomains()); 4048 } catch (Exception e) { 4049 loge("Exception in setDnsServersForNetwork: " + e); 4050 } 4051 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4052 if (defaultNai != null && defaultNai.network.netId == netId) { 4053 setDefaultDnsSystemProperties(dnses); 4054 } 4055 flushVmDnsCache(); 4056 } else if (flush) { 4057 try { 4058 mNetd.flushNetworkDnsCache(netId); 4059 } catch (Exception e) { 4060 loge("Exception in flushNetworkDnsCache: " + e); 4061 } 4062 flushVmDnsCache(); 4063 } 4064 } 4065 4066 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4067 int last = 0; 4068 for (InetAddress dns : dnses) { 4069 ++last; 4070 String key = "net.dns" + last; 4071 String value = dns.getHostAddress(); 4072 SystemProperties.set(key, value); 4073 } 4074 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4075 String key = "net.dns" + i; 4076 SystemProperties.set(key, ""); 4077 } 4078 mNumDnsEntries = last; 4079 } 4080 4081 /** 4082 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4083 * augmented with any stateful capabilities implied from {@code networkAgent} 4084 * (e.g., validated status and captive portal status). 4085 * 4086 * @param nai the network having its capabilities updated. 4087 * @param networkCapabilities the new network capabilities. 4088 */ 4089 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4090 // Don't modify caller's NetworkCapabilities. 4091 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4092 if (nai.lastValidated) { 4093 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4094 } else { 4095 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4096 } 4097 if (nai.lastCaptivePortalDetected) { 4098 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4099 } else { 4100 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4101 } 4102 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4103 final int oldScore = nai.getCurrentScore(); 4104 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4105 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4106 try { 4107 mNetd.setNetworkPermission(nai.network.netId, 4108 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4109 null : NetworkManagementService.PERMISSION_SYSTEM); 4110 } catch (RemoteException e) { 4111 loge("Exception in setNetworkPermission: " + e); 4112 } 4113 } 4114 synchronized (nai) { 4115 nai.networkCapabilities = networkCapabilities; 4116 } 4117 rematchAllNetworksAndRequests(nai, oldScore); 4118 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4119 } 4120 } 4121 4122 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4123 for (int i = 0; i < nai.networkRequests.size(); i++) { 4124 NetworkRequest nr = nai.networkRequests.valueAt(i); 4125 // Don't send listening requests to factories. b/17393458 4126 if (!isRequest(nr)) continue; 4127 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4128 } 4129 } 4130 4131 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4132 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4133 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4134 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4135 networkRequest); 4136 } 4137 } 4138 4139 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4140 int notificationType) { 4141 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4142 Intent intent = new Intent(); 4143 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4144 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4145 nri.mPendingIntentSent = true; 4146 sendIntent(nri.mPendingIntent, intent); 4147 } 4148 // else not handled 4149 } 4150 4151 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4152 mPendingIntentWakeLock.acquire(); 4153 try { 4154 if (DBG) log("Sending " + pendingIntent); 4155 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4156 } catch (PendingIntent.CanceledException e) { 4157 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4158 mPendingIntentWakeLock.release(); 4159 releasePendingNetworkRequest(pendingIntent); 4160 } 4161 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4162 } 4163 4164 @Override 4165 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4166 String resultData, Bundle resultExtras) { 4167 if (DBG) log("Finished sending " + pendingIntent); 4168 mPendingIntentWakeLock.release(); 4169 // Release with a delay so the receiving client has an opportunity to put in its 4170 // own request. 4171 releasePendingNetworkRequestWithDelay(pendingIntent); 4172 } 4173 4174 private void callCallbackForRequest(NetworkRequestInfo nri, 4175 NetworkAgentInfo networkAgent, int notificationType) { 4176 if (nri.messenger == null) return; // Default request has no msgr 4177 Bundle bundle = new Bundle(); 4178 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4179 new NetworkRequest(nri.request)); 4180 Message msg = Message.obtain(); 4181 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4182 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4183 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4184 } 4185 switch (notificationType) { 4186 case ConnectivityManager.CALLBACK_LOSING: { 4187 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4188 break; 4189 } 4190 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4191 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4192 new NetworkCapabilities(networkAgent.networkCapabilities)); 4193 break; 4194 } 4195 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4196 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4197 new LinkProperties(networkAgent.linkProperties)); 4198 break; 4199 } 4200 } 4201 msg.what = notificationType; 4202 msg.setData(bundle); 4203 try { 4204 if (VDBG) { 4205 log("sending notification " + notifyTypeToName(notificationType) + 4206 " for " + nri.request); 4207 } 4208 nri.messenger.send(msg); 4209 } catch (RemoteException e) { 4210 // may occur naturally in the race of binder death. 4211 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4212 } 4213 } 4214 4215 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4216 for (int i = 0; i < nai.networkRequests.size(); i++) { 4217 NetworkRequest nr = nai.networkRequests.valueAt(i); 4218 // Ignore listening requests. 4219 if (!isRequest(nr)) continue; 4220 loge("Dead network still had at least " + nr); 4221 break; 4222 } 4223 nai.asyncChannel.disconnect(); 4224 } 4225 4226 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4227 if (oldNetwork == null) { 4228 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4229 return; 4230 } 4231 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4232 teardownUnneededNetwork(oldNetwork); 4233 } 4234 4235 private void makeDefault(NetworkAgentInfo newNetwork) { 4236 if (DBG) log("Switching to new default network: " + newNetwork); 4237 setupDataActivityTracking(newNetwork); 4238 try { 4239 mNetd.setDefaultNetId(newNetwork.network.netId); 4240 } catch (Exception e) { 4241 loge("Exception setting default network :" + e); 4242 } 4243 notifyLockdownVpn(newNetwork); 4244 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4245 updateTcpBufferSizes(newNetwork); 4246 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4247 } 4248 4249 // Handles a network appearing or improving its score. 4250 // 4251 // - Evaluates all current NetworkRequests that can be 4252 // satisfied by newNetwork, and reassigns to newNetwork 4253 // any such requests for which newNetwork is the best. 4254 // 4255 // - Lingers any validated Networks that as a result are no longer 4256 // needed. A network is needed if it is the best network for 4257 // one or more NetworkRequests, or if it is a VPN. 4258 // 4259 // - Tears down newNetwork if it just became validated 4260 // but turns out to be unneeded. 4261 // 4262 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4263 // networks that have no chance (i.e. even if validated) 4264 // of becoming the highest scoring network. 4265 // 4266 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4267 // it does not remove NetworkRequests that other Networks could better satisfy. 4268 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4269 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4270 // as it performs better by a factor of the number of Networks. 4271 // 4272 // @param newNetwork is the network to be matched against NetworkRequests. 4273 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4274 // performed to tear down unvalidated networks that have no chance (i.e. even if 4275 // validated) of becoming the highest scoring network. 4276 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4277 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4278 if (!newNetwork.created) return; 4279 boolean keep = newNetwork.isVPN(); 4280 boolean isNewDefault = false; 4281 NetworkAgentInfo oldDefaultNetwork = null; 4282 if (VDBG) log("rematching " + newNetwork.name()); 4283 // Find and migrate to this Network any NetworkRequests for 4284 // which this network is now the best. 4285 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4286 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4287 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4288 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4289 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4290 final boolean satisfies = newNetwork.satisfies(nri.request); 4291 if (newNetwork == currentNetwork && satisfies) { 4292 if (VDBG) { 4293 log("Network " + newNetwork.name() + " was already satisfying" + 4294 " request " + nri.request.requestId + ". No change."); 4295 } 4296 keep = true; 4297 continue; 4298 } 4299 4300 // check if it satisfies the NetworkCapabilities 4301 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4302 if (satisfies) { 4303 if (!nri.isRequest) { 4304 // This is not a request, it's a callback listener. 4305 // Add it to newNetwork regardless of score. 4306 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4307 continue; 4308 } 4309 4310 // next check if it's better than any current network we're using for 4311 // this request 4312 if (VDBG) { 4313 log("currentScore = " + 4314 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4315 ", newScore = " + newNetwork.getCurrentScore()); 4316 } 4317 if (currentNetwork == null || 4318 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4319 if (DBG) log("rematch for " + newNetwork.name()); 4320 if (currentNetwork != null) { 4321 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4322 currentNetwork.networkRequests.remove(nri.request.requestId); 4323 currentNetwork.networkLingered.add(nri.request); 4324 affectedNetworks.add(currentNetwork); 4325 } else { 4326 if (DBG) log(" accepting network in place of null"); 4327 } 4328 unlinger(newNetwork); 4329 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4330 if (!newNetwork.addRequest(nri.request)) { 4331 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4332 } 4333 addedRequests.add(nri); 4334 keep = true; 4335 // Tell NetworkFactories about the new score, so they can stop 4336 // trying to connect if they know they cannot match it. 4337 // TODO - this could get expensive if we have alot of requests for this 4338 // network. Think about if there is a way to reduce this. Push 4339 // netid->request mapping to each factory? 4340 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4341 if (mDefaultRequest.requestId == nri.request.requestId) { 4342 isNewDefault = true; 4343 oldDefaultNetwork = currentNetwork; 4344 } 4345 } 4346 } else if (newNetwork.networkRequests.get(nri.request.requestId) != null) { 4347 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4348 // mark it as no longer satisfying "nri". Because networks are processed by 4349 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4350 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4351 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4352 // This means this code doesn't have to handle the case where "currentNetwork" no 4353 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4354 if (DBG) { 4355 log("Network " + newNetwork.name() + " stopped satisfying" + 4356 " request " + nri.request.requestId); 4357 } 4358 newNetwork.networkRequests.remove(nri.request.requestId); 4359 if (currentNetwork == newNetwork) { 4360 mNetworkForRequestId.remove(nri.request.requestId); 4361 sendUpdatedScoreToFactories(nri.request, 0); 4362 } else { 4363 if (nri.isRequest == true) { 4364 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4365 newNetwork.name() + 4366 " without updating mNetworkForRequestId or factories!"); 4367 } 4368 } 4369 // TODO: technically, sending CALLBACK_LOST here is 4370 // incorrect if nri is a request (not a listen) and there 4371 // is a replacement network currently connected that can 4372 // satisfy it. However, the only capability that can both 4373 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4374 // so this code is only incorrect for a network that loses 4375 // the TRUSTED capability, which is a rare case. 4376 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST); 4377 } 4378 } 4379 // Linger any networks that are no longer needed. 4380 for (NetworkAgentInfo nai : affectedNetworks) { 4381 if (nai.lingering) { 4382 // Already lingered. Nothing to do. This can only happen if "nai" is in 4383 // "affectedNetworks" twice. The reasoning being that to get added to 4384 // "affectedNetworks", "nai" must have been satisfying a NetworkRequest 4385 // (i.e. not lingered) so it could have only been lingered by this loop. 4386 // unneeded(nai) will be false and we'll call unlinger() below which would 4387 // be bad, so handle it here. 4388 } else if (unneeded(nai)) { 4389 linger(nai); 4390 } else { 4391 // Clear nai.networkLingered we might have added above. 4392 unlinger(nai); 4393 } 4394 } 4395 if (isNewDefault) { 4396 // Notify system services that this network is up. 4397 makeDefault(newNetwork); 4398 synchronized (ConnectivityService.this) { 4399 // have a new default network, release the transition wakelock in 4400 // a second if it's held. The second pause is to allow apps 4401 // to reconnect over the new network 4402 if (mNetTransitionWakeLock.isHeld()) { 4403 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4404 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4405 mNetTransitionWakeLockSerialNumber, 0), 4406 1000); 4407 } 4408 } 4409 } 4410 4411 // do this after the default net is switched, but 4412 // before LegacyTypeTracker sends legacy broadcasts 4413 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4414 4415 if (isNewDefault) { 4416 // Maintain the illusion: since the legacy API only 4417 // understands one network at a time, we must pretend 4418 // that the current default network disconnected before 4419 // the new one connected. 4420 if (oldDefaultNetwork != null) { 4421 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4422 oldDefaultNetwork, true); 4423 } 4424 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4425 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4426 notifyLockdownVpn(newNetwork); 4427 } 4428 4429 if (keep) { 4430 // Notify battery stats service about this network, both the normal 4431 // interface and any stacked links. 4432 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4433 try { 4434 final IBatteryStats bs = BatteryStatsService.getService(); 4435 final int type = newNetwork.networkInfo.getType(); 4436 4437 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4438 bs.noteNetworkInterfaceType(baseIface, type); 4439 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4440 final String stackedIface = stacked.getInterfaceName(); 4441 bs.noteNetworkInterfaceType(stackedIface, type); 4442 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4443 } 4444 } catch (RemoteException ignored) { 4445 } 4446 4447 // This has to happen after the notifyNetworkCallbacks as that tickles each 4448 // ConnectivityManager instance so that legacy requests correctly bind dns 4449 // requests to this network. The legacy users are listening for this bcast 4450 // and will generally do a dns request so they can ensureRouteToHost and if 4451 // they do that before the callbacks happen they'll use the default network. 4452 // 4453 // TODO: Is there still a race here? We send the broadcast 4454 // after sending the callback, but if the app can receive the 4455 // broadcast before the callback, it might still break. 4456 // 4457 // This *does* introduce a race where if the user uses the new api 4458 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4459 // they may get old info. Reverse this after the old startUsing api is removed. 4460 // This is on top of the multiple intent sequencing referenced in the todo above. 4461 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4462 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4463 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4464 // legacy type tracker filters out repeat adds 4465 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4466 } 4467 } 4468 4469 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4470 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4471 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4472 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4473 if (newNetwork.isVPN()) { 4474 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4475 } 4476 } 4477 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4478 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4479 if (unneeded(nai)) { 4480 if (DBG) log("Reaping " + nai.name()); 4481 teardownUnneededNetwork(nai); 4482 } 4483 } 4484 } 4485 } 4486 4487 /** 4488 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4489 * being disconnected. 4490 * @param changed If only one Network's score or capabilities have been modified since the last 4491 * time this function was called, pass this Network in this argument, otherwise pass 4492 * null. 4493 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4494 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4495 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4496 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4497 * network's score. 4498 */ 4499 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4500 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4501 // to avoid the slowness. It is not simply enough to process just "changed", for 4502 // example in the case where "changed"'s score decreases and another network should begin 4503 // satifying a NetworkRequest that "changed" currently satisfies. 4504 4505 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4506 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4507 // rematchNetworkAndRequests() handles. 4508 if (changed != null && oldScore < changed.getCurrentScore()) { 4509 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP); 4510 } else { 4511 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4512 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4513 // Rematch higher scoring networks first to prevent requests first matching a lower 4514 // scoring network and then a higher scoring network, which could produce multiple 4515 // callbacks and inadvertently unlinger networks. 4516 Arrays.sort(nais); 4517 for (NetworkAgentInfo nai : nais) { 4518 rematchNetworkAndRequests(nai, 4519 // Only reap the last time through the loop. Reaping before all rematching 4520 // is complete could incorrectly teardown a network that hasn't yet been 4521 // rematched. 4522 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4523 : ReapUnvalidatedNetworks.REAP); 4524 } 4525 } 4526 } 4527 4528 private void updateInetCondition(NetworkAgentInfo nai) { 4529 // Don't bother updating until we've graduated to validated at least once. 4530 if (!nai.everValidated) return; 4531 // For now only update icons for default connection. 4532 // TODO: Update WiFi and cellular icons separately. b/17237507 4533 if (!isDefaultNetwork(nai)) return; 4534 4535 int newInetCondition = nai.lastValidated ? 100 : 0; 4536 // Don't repeat publish. 4537 if (newInetCondition == mDefaultInetConditionPublished) return; 4538 4539 mDefaultInetConditionPublished = newInetCondition; 4540 sendInetConditionBroadcast(nai.networkInfo); 4541 } 4542 4543 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4544 if (mLockdownTracker != null) { 4545 if (nai != null && nai.isVPN()) { 4546 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4547 } else { 4548 mLockdownTracker.onNetworkInfoChanged(); 4549 } 4550 } 4551 } 4552 4553 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4554 NetworkInfo.State state = newInfo.getState(); 4555 NetworkInfo oldInfo = null; 4556 final int oldScore = networkAgent.getCurrentScore(); 4557 synchronized (networkAgent) { 4558 oldInfo = networkAgent.networkInfo; 4559 networkAgent.networkInfo = newInfo; 4560 } 4561 notifyLockdownVpn(networkAgent); 4562 4563 if (oldInfo != null && oldInfo.getState() == state) { 4564 if (VDBG) log("ignoring duplicate network state non-change"); 4565 return; 4566 } 4567 if (DBG) { 4568 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4569 (oldInfo == null ? "null" : oldInfo.getState()) + 4570 " to " + state); 4571 } 4572 4573 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4574 try { 4575 // This should never fail. Specifying an already in use NetID will cause failure. 4576 if (networkAgent.isVPN()) { 4577 mNetd.createVirtualNetwork(networkAgent.network.netId, 4578 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4579 (networkAgent.networkMisc == null || 4580 !networkAgent.networkMisc.allowBypass)); 4581 } else { 4582 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4583 networkAgent.networkCapabilities.hasCapability( 4584 NET_CAPABILITY_NOT_RESTRICTED) ? 4585 null : NetworkManagementService.PERMISSION_SYSTEM); 4586 } 4587 } catch (Exception e) { 4588 loge("Error creating network " + networkAgent.network.netId + ": " 4589 + e.getMessage()); 4590 return; 4591 } 4592 networkAgent.created = true; 4593 updateLinkProperties(networkAgent, null); 4594 notifyIfacesChanged(); 4595 4596 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4597 scheduleUnvalidatedPrompt(networkAgent); 4598 4599 if (networkAgent.isVPN()) { 4600 // Temporarily disable the default proxy (not global). 4601 synchronized (mProxyLock) { 4602 if (!mDefaultProxyDisabled) { 4603 mDefaultProxyDisabled = true; 4604 if (mGlobalProxy == null && mDefaultProxy != null) { 4605 sendProxyBroadcast(null); 4606 } 4607 } 4608 } 4609 // TODO: support proxy per network. 4610 } 4611 4612 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 4613 // be communicated to a particular NetworkAgent depends only on the network's immutable, 4614 // capabilities, so it only needs to be done once on initial connect, not every time the 4615 // network's capabilities change. Note that we do this before rematching the network, 4616 // so we could decide to tear it down immediately afterwards. That's fine though - on 4617 // disconnection NetworkAgents should stop any signal strength monitoring they have been 4618 // doing. 4619 updateSignalStrengthThresholds(networkAgent); 4620 4621 // Consider network even though it is not yet validated. 4622 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP); 4623 4624 // This has to happen after matching the requests, because callbacks are just requests. 4625 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4626 } else if (state == NetworkInfo.State.DISCONNECTED) { 4627 networkAgent.asyncChannel.disconnect(); 4628 if (networkAgent.isVPN()) { 4629 synchronized (mProxyLock) { 4630 if (mDefaultProxyDisabled) { 4631 mDefaultProxyDisabled = false; 4632 if (mGlobalProxy == null && mDefaultProxy != null) { 4633 sendProxyBroadcast(mDefaultProxy); 4634 } 4635 } 4636 } 4637 } 4638 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 4639 state == NetworkInfo.State.SUSPENDED) { 4640 // going into or coming out of SUSPEND: rescore and notify 4641 if (networkAgent.getCurrentScore() != oldScore) { 4642 rematchAllNetworksAndRequests(networkAgent, oldScore); 4643 } 4644 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 4645 ConnectivityManager.CALLBACK_SUSPENDED : 4646 ConnectivityManager.CALLBACK_RESUMED)); 4647 mLegacyTypeTracker.update(networkAgent); 4648 } 4649 } 4650 4651 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4652 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4653 if (score < 0) { 4654 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4655 "). Bumping score to min of 0"); 4656 score = 0; 4657 } 4658 4659 final int oldScore = nai.getCurrentScore(); 4660 nai.setCurrentScore(score); 4661 4662 rematchAllNetworksAndRequests(nai, oldScore); 4663 4664 sendUpdatedScoreToFactories(nai); 4665 } 4666 4667 // notify only this one new request of the current state 4668 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4669 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4670 // TODO - read state from monitor to decide what to send. 4671// if (nai.networkMonitor.isLingering()) { 4672// notifyType = NetworkCallbacks.LOSING; 4673// } else if (nai.networkMonitor.isEvaluating()) { 4674// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4675// } 4676 if (nri.mPendingIntent == null) { 4677 callCallbackForRequest(nri, nai, notifyType); 4678 } else { 4679 sendPendingIntentForRequest(nri, nai, notifyType); 4680 } 4681 } 4682 4683 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 4684 // The NetworkInfo we actually send out has no bearing on the real 4685 // state of affairs. For example, if the default connection is mobile, 4686 // and a request for HIPRI has just gone away, we need to pretend that 4687 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4688 // the state to DISCONNECTED, even though the network is of type MOBILE 4689 // and is still connected. 4690 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4691 info.setType(type); 4692 if (state != DetailedState.DISCONNECTED) { 4693 info.setDetailedState(state, null, info.getExtraInfo()); 4694 sendConnectedBroadcast(info); 4695 } else { 4696 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 4697 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4698 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4699 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4700 if (info.isFailover()) { 4701 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4702 nai.networkInfo.setFailover(false); 4703 } 4704 if (info.getReason() != null) { 4705 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4706 } 4707 if (info.getExtraInfo() != null) { 4708 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4709 } 4710 NetworkAgentInfo newDefaultAgent = null; 4711 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4712 newDefaultAgent = getDefaultNetwork(); 4713 if (newDefaultAgent != null) { 4714 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4715 newDefaultAgent.networkInfo); 4716 } else { 4717 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4718 } 4719 } 4720 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4721 mDefaultInetConditionPublished); 4722 sendStickyBroadcast(intent); 4723 if (newDefaultAgent != null) { 4724 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4725 } 4726 } 4727 } 4728 4729 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4730 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4731 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4732 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4733 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4734 if (VDBG) log(" sending notification for " + nr); 4735 if (nri.mPendingIntent == null) { 4736 callCallbackForRequest(nri, networkAgent, notifyType); 4737 } else { 4738 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4739 } 4740 } 4741 } 4742 4743 private String notifyTypeToName(int notifyType) { 4744 switch (notifyType) { 4745 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4746 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4747 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4748 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4749 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4750 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4751 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4752 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4753 } 4754 return "UNKNOWN"; 4755 } 4756 4757 /** 4758 * Notify other system services that set of active ifaces has changed. 4759 */ 4760 private void notifyIfacesChanged() { 4761 try { 4762 mStatsService.forceUpdateIfaces(); 4763 } catch (Exception ignored) { 4764 } 4765 } 4766 4767 @Override 4768 public boolean addVpnAddress(String address, int prefixLength) { 4769 throwIfLockdownEnabled(); 4770 int user = UserHandle.getUserId(Binder.getCallingUid()); 4771 synchronized (mVpns) { 4772 return mVpns.get(user).addAddress(address, prefixLength); 4773 } 4774 } 4775 4776 @Override 4777 public boolean removeVpnAddress(String address, int prefixLength) { 4778 throwIfLockdownEnabled(); 4779 int user = UserHandle.getUserId(Binder.getCallingUid()); 4780 synchronized (mVpns) { 4781 return mVpns.get(user).removeAddress(address, prefixLength); 4782 } 4783 } 4784 4785 @Override 4786 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 4787 throwIfLockdownEnabled(); 4788 int user = UserHandle.getUserId(Binder.getCallingUid()); 4789 boolean success; 4790 synchronized (mVpns) { 4791 success = mVpns.get(user).setUnderlyingNetworks(networks); 4792 } 4793 if (success) { 4794 notifyIfacesChanged(); 4795 } 4796 return success; 4797 } 4798 4799 @Override 4800 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 4801 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 4802 enforceKeepalivePermission(); 4803 mKeepaliveTracker.startNattKeepalive( 4804 getNetworkAgentInfoForNetwork(network), 4805 intervalSeconds, messenger, binder, 4806 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 4807 } 4808 4809 @Override 4810 public void stopKeepalive(Network network, int slot) { 4811 mHandler.sendMessage(mHandler.obtainMessage( 4812 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 4813 } 4814 4815 @Override 4816 public void factoryReset() { 4817 enforceConnectivityInternalPermission(); 4818 4819 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 4820 return; 4821 } 4822 4823 final int userId = UserHandle.getCallingUserId(); 4824 4825 // Turn airplane mode off 4826 setAirplaneMode(false); 4827 4828 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 4829 // Untether 4830 for (String tether : getTetheredIfaces()) { 4831 untether(tether); 4832 } 4833 } 4834 4835 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 4836 // Turn VPN off 4837 VpnConfig vpnConfig = getVpnConfig(userId); 4838 if (vpnConfig != null) { 4839 if (vpnConfig.legacy) { 4840 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 4841 } else { 4842 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 4843 // in the future without user intervention. 4844 setVpnPackageAuthorization(vpnConfig.user, userId, false); 4845 4846 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN, userId); 4847 } 4848 } 4849 } 4850 } 4851 4852 @VisibleForTesting 4853 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 4854 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 4855 return new NetworkMonitor(context, handler, nai, defaultRequest); 4856 } 4857 4858} 4859