ConnectivityService.java revision d2baf792f8b7ae46aa6a35cff25eb7e3923f5125
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.BroadcastOptions; 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.net.metrics.ConnectivityServiceChangeEvent; 75import android.os.Binder; 76import android.os.Build; 77import android.os.Bundle; 78import android.os.FileUtils; 79import android.os.Handler; 80import android.os.HandlerThread; 81import android.os.IBinder; 82import android.os.INetworkManagementService; 83import android.os.Looper; 84import android.os.Message; 85import android.os.Messenger; 86import android.os.ParcelFileDescriptor; 87import android.os.PowerManager; 88import android.os.Process; 89import android.os.RemoteException; 90import android.os.ResultReceiver; 91import android.os.SystemProperties; 92import android.os.UserHandle; 93import android.os.UserManager; 94import android.provider.Settings; 95import android.security.Credentials; 96import android.security.KeyStore; 97import android.telephony.TelephonyManager; 98import android.text.TextUtils; 99import android.util.LocalLog; 100import android.util.LocalLog.ReadOnlyLocalLog; 101import android.util.Pair; 102import android.util.Slog; 103import android.util.SparseArray; 104import android.util.SparseBooleanArray; 105import android.util.SparseIntArray; 106import android.util.Xml; 107 108import com.android.internal.R; 109import com.android.internal.annotations.GuardedBy; 110import com.android.internal.annotations.VisibleForTesting; 111import com.android.internal.app.IBatteryStats; 112import com.android.internal.net.LegacyVpnInfo; 113import com.android.internal.net.NetworkStatsFactory; 114import com.android.internal.net.VpnConfig; 115import com.android.internal.net.VpnInfo; 116import com.android.internal.net.VpnProfile; 117import com.android.internal.util.AsyncChannel; 118import com.android.internal.util.IndentingPrintWriter; 119import com.android.internal.util.XmlUtils; 120import com.android.server.am.BatteryStatsService; 121import com.android.server.connectivity.DataConnectionStats; 122import com.android.server.connectivity.KeepaliveTracker; 123import com.android.server.connectivity.NetworkDiagnostics; 124import com.android.server.connectivity.Nat464Xlat; 125import com.android.server.connectivity.NetworkAgentInfo; 126import com.android.server.connectivity.NetworkMonitor; 127import com.android.server.connectivity.PacManager; 128import com.android.server.connectivity.PermissionMonitor; 129import com.android.server.connectivity.Tethering; 130import com.android.server.connectivity.Vpn; 131import com.android.server.net.BaseNetworkObserver; 132import com.android.server.net.LockdownVpnTracker; 133import com.google.android.collect.Lists; 134import com.google.android.collect.Sets; 135 136import org.xmlpull.v1.XmlPullParser; 137import org.xmlpull.v1.XmlPullParserException; 138 139import java.io.File; 140import java.io.FileDescriptor; 141import java.io.FileNotFoundException; 142import java.io.FileReader; 143import java.io.IOException; 144import java.io.PrintWriter; 145import java.net.Inet4Address; 146import java.net.InetAddress; 147import java.net.UnknownHostException; 148import java.util.ArrayDeque; 149import java.util.ArrayList; 150import java.util.Arrays; 151import java.util.Collection; 152import java.util.HashMap; 153import java.util.HashSet; 154import java.util.SortedSet; 155import java.util.TreeSet; 156import java.util.List; 157import java.util.Map; 158import java.util.Objects; 159 160/** 161 * @hide 162 */ 163public class ConnectivityService extends IConnectivityManager.Stub 164 implements PendingIntent.OnFinished { 165 private static final String TAG = "ConnectivityService"; 166 167 private static final boolean DBG = false; 168 private static final boolean VDBG = false; 169 170 private static final boolean LOGD_RULES = false; 171 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 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 * PAC manager has received new port. 257 */ 258 private static final int EVENT_PROXY_HAS_CHANGED = 16; 259 260 /** 261 * used internally when registering NetworkFactories 262 * obj = NetworkFactoryInfo 263 */ 264 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 265 266 /** 267 * used internally when registering NetworkAgents 268 * obj = Messenger 269 */ 270 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 271 272 /** 273 * used to add a network request 274 * includes a NetworkRequestInfo 275 */ 276 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 277 278 /** 279 * indicates a timeout period is over - check if we had a network yet or not 280 * and if not, call the timeout calback (but leave the request live until they 281 * cancel it. 282 * includes a NetworkRequestInfo 283 */ 284 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 285 286 /** 287 * used to add a network listener - no request 288 * includes a NetworkRequestInfo 289 */ 290 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 291 292 /** 293 * used to remove a network request, either a listener or a real request 294 * arg1 = UID of caller 295 * obj = NetworkRequest 296 */ 297 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 298 299 /** 300 * used internally when registering NetworkFactories 301 * obj = Messenger 302 */ 303 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 304 305 /** 306 * used internally to expire a wakelock when transitioning 307 * from one net to another. Expire happens when we fail to find 308 * a new network (typically after 1 minute) - 309 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 310 * a replacement network. 311 */ 312 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 313 314 /** 315 * Used internally to indicate the system is ready. 316 */ 317 private static final int EVENT_SYSTEM_READY = 25; 318 319 /** 320 * used to add a network request with a pending intent 321 * obj = NetworkRequestInfo 322 */ 323 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 324 325 /** 326 * used to remove a pending intent and its associated network request. 327 * arg1 = UID of caller 328 * obj = PendingIntent 329 */ 330 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 331 332 /** 333 * used to specify whether a network should be used even if unvalidated. 334 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 335 * arg2 = whether to remember this choice in the future (1 or 0) 336 * obj = network 337 */ 338 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 339 340 /** 341 * used to ask the user to confirm a connection to an unvalidated network. 342 * obj = network 343 */ 344 private static final int EVENT_PROMPT_UNVALIDATED = 29; 345 346 /** 347 * used internally to (re)configure mobile data always-on settings. 348 */ 349 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 350 351 /** 352 * used to add a network listener with a pending intent 353 * obj = NetworkRequestInfo 354 */ 355 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 356 357 /** Handler thread used for both of the handlers below. */ 358 @VisibleForTesting 359 protected final HandlerThread mHandlerThread; 360 /** Handler used for internal events. */ 361 final private InternalHandler mHandler; 362 /** Handler used for incoming {@link NetworkStateTracker} events. */ 363 final private NetworkStateTrackerHandler mTrackerHandler; 364 365 private boolean mSystemReady; 366 private Intent mInitialBroadcast; 367 368 private PowerManager.WakeLock mNetTransitionWakeLock; 369 private String mNetTransitionWakeLockCausedBy = ""; 370 private int mNetTransitionWakeLockSerialNumber; 371 private int mNetTransitionWakeLockTimeout; 372 private final PowerManager.WakeLock mPendingIntentWakeLock; 373 374 private InetAddress mDefaultDns; 375 376 // used in DBG mode to track inet condition reports 377 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 378 private ArrayList mInetLog; 379 380 // track the current default http proxy - tell the world if we get a new one (real change) 381 private volatile ProxyInfo mDefaultProxy = null; 382 private Object mProxyLock = new Object(); 383 private boolean mDefaultProxyDisabled = false; 384 385 // track the global proxy. 386 private ProxyInfo mGlobalProxy = null; 387 388 private PacManager mPacManager = null; 389 390 final private SettingsObserver mSettingsObserver; 391 392 private UserManager mUserManager; 393 394 NetworkConfig[] mNetConfigs; 395 int mNetworksDefined; 396 397 // the set of network types that can only be enabled by system/sig apps 398 List mProtectedNetworks; 399 400 private DataConnectionStats mDataConnectionStats; 401 402 TelephonyManager mTelephonyManager; 403 404 private KeepaliveTracker mKeepaliveTracker; 405 406 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 407 private final static int MIN_NET_ID = 100; // some reserved marks 408 private final static int MAX_NET_ID = 65535; 409 private int mNextNetId = MIN_NET_ID; 410 411 // sequence number of NetworkRequests 412 private int mNextNetworkRequestId = 1; 413 414 // NetworkRequest activity String log entries. 415 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 416 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 417 418 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 419 private static final int MAX_VALIDATION_LOGS = 10; 420 private final ArrayDeque<Pair<Network,ReadOnlyLocalLog>> mValidationLogs = 421 new ArrayDeque<Pair<Network,ReadOnlyLocalLog>>(MAX_VALIDATION_LOGS); 422 423 private void addValidationLogs(ReadOnlyLocalLog log, Network network) { 424 synchronized(mValidationLogs) { 425 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 426 mValidationLogs.removeLast(); 427 } 428 mValidationLogs.addFirst(new Pair(network, log)); 429 } 430 } 431 432 /** 433 * Implements support for the legacy "one network per network type" model. 434 * 435 * We used to have a static array of NetworkStateTrackers, one for each 436 * network type, but that doesn't work any more now that we can have, 437 * for example, more that one wifi network. This class stores all the 438 * NetworkAgentInfo objects that support a given type, but the legacy 439 * API will only see the first one. 440 * 441 * It serves two main purposes: 442 * 443 * 1. Provide information about "the network for a given type" (since this 444 * API only supports one). 445 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 446 * the first network for a given type changes, or if the default network 447 * changes. 448 */ 449 private class LegacyTypeTracker { 450 451 private static final boolean DBG = false; 452 private static final boolean VDBG = false; 453 private static final String TAG = "CSLegacyTypeTracker"; 454 455 /** 456 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 457 * Each list holds references to all NetworkAgentInfos that are used to 458 * satisfy requests for that network type. 459 * 460 * This array is built out at startup such that an unsupported network 461 * doesn't get an ArrayList instance, making this a tristate: 462 * unsupported, supported but not active and active. 463 * 464 * The actual lists are populated when we scan the network types that 465 * are supported on this device. 466 */ 467 private ArrayList<NetworkAgentInfo> mTypeLists[]; 468 469 public LegacyTypeTracker() { 470 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 471 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 472 } 473 474 public void addSupportedType(int type) { 475 if (mTypeLists[type] != null) { 476 throw new IllegalStateException( 477 "legacy list for type " + type + "already initialized"); 478 } 479 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 480 } 481 482 public boolean isTypeSupported(int type) { 483 return isNetworkTypeValid(type) && mTypeLists[type] != null; 484 } 485 486 public NetworkAgentInfo getNetworkForType(int type) { 487 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 488 return mTypeLists[type].get(0); 489 } else { 490 return null; 491 } 492 } 493 494 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 495 boolean isDefaultNetwork) { 496 if (DBG) { 497 log("Sending " + state + 498 " broadcast for type " + type + " " + nai.name() + 499 " isDefaultNetwork=" + isDefaultNetwork); 500 } 501 } 502 503 /** Adds the given network to the specified legacy type list. */ 504 public void add(int type, NetworkAgentInfo nai) { 505 if (!isTypeSupported(type)) { 506 return; // Invalid network type. 507 } 508 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 509 510 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 511 if (list.contains(nai)) { 512 return; 513 } 514 515 list.add(nai); 516 517 // Send a broadcast if this is the first network of its type or if it's the default. 518 final boolean isDefaultNetwork = isDefaultNetwork(nai); 519 if (list.size() == 1 || isDefaultNetwork) { 520 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 521 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 522 } 523 } 524 525 /** Removes the given network from the specified legacy type list. */ 526 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 527 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 528 if (list == null || list.isEmpty()) { 529 return; 530 } 531 532 final boolean wasFirstNetwork = list.get(0).equals(nai); 533 534 if (!list.remove(nai)) { 535 return; 536 } 537 538 final DetailedState state = DetailedState.DISCONNECTED; 539 540 if (wasFirstNetwork || wasDefault) { 541 maybeLogBroadcast(nai, state, type, wasDefault); 542 sendLegacyNetworkBroadcast(nai, state, type); 543 } 544 545 if (!list.isEmpty() && wasFirstNetwork) { 546 if (DBG) log("Other network available for type " + type + 547 ", sending connected broadcast"); 548 final NetworkAgentInfo replacement = list.get(0); 549 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 550 sendLegacyNetworkBroadcast(replacement, state, type); 551 } 552 } 553 554 /** Removes the given network from all legacy type lists. */ 555 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 556 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 557 for (int type = 0; type < mTypeLists.length; type++) { 558 remove(type, nai, wasDefault); 559 } 560 } 561 562 // send out another legacy broadcast - currently only used for suspend/unsuspend 563 // toggle 564 public void update(NetworkAgentInfo nai) { 565 final boolean isDefault = isDefaultNetwork(nai); 566 final DetailedState state = nai.networkInfo.getDetailedState(); 567 for (int type = 0; type < mTypeLists.length; type++) { 568 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 569 final boolean contains = (list != null && list.contains(nai)); 570 final boolean isFirst = (list != null && list.size() > 0 && nai == list.get(0)); 571 if (isFirst || (contains && isDefault)) { 572 maybeLogBroadcast(nai, state, type, isDefault); 573 sendLegacyNetworkBroadcast(nai, state, type); 574 } 575 } 576 } 577 578 private String naiToString(NetworkAgentInfo nai) { 579 String name = (nai != null) ? nai.name() : "null"; 580 String state = (nai.networkInfo != null) ? 581 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 582 "???/???"; 583 return name + " " + state; 584 } 585 586 public void dump(IndentingPrintWriter pw) { 587 pw.println("mLegacyTypeTracker:"); 588 pw.increaseIndent(); 589 pw.print("Supported types:"); 590 for (int type = 0; type < mTypeLists.length; type++) { 591 if (mTypeLists[type] != null) pw.print(" " + type); 592 } 593 pw.println(); 594 pw.println("Current state:"); 595 pw.increaseIndent(); 596 for (int type = 0; type < mTypeLists.length; type++) { 597 if (mTypeLists[type] == null|| mTypeLists[type].size() == 0) continue; 598 for (NetworkAgentInfo nai : mTypeLists[type]) { 599 pw.println(type + " " + naiToString(nai)); 600 } 601 } 602 pw.decreaseIndent(); 603 pw.decreaseIndent(); 604 pw.println(); 605 } 606 607 // This class needs its own log method because it has a different TAG. 608 private void log(String s) { 609 Slog.d(TAG, s); 610 } 611 612 } 613 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 614 615 @VisibleForTesting 616 protected HandlerThread createHandlerThread() { 617 return new HandlerThread("ConnectivityServiceThread"); 618 } 619 620 public ConnectivityService(Context context, INetworkManagementService netManager, 621 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 622 if (DBG) log("ConnectivityService starting up"); 623 624 mDefaultRequest = createInternetRequestForTransport(-1); 625 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, 626 new Binder(), NetworkRequestType.REQUEST); 627 mNetworkRequests.put(mDefaultRequest, defaultNRI); 628 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 629 630 mDefaultMobileDataRequest = createInternetRequestForTransport( 631 NetworkCapabilities.TRANSPORT_CELLULAR); 632 633 mHandlerThread = createHandlerThread(); 634 mHandlerThread.start(); 635 mHandler = new InternalHandler(mHandlerThread.getLooper()); 636 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 637 638 // setup our unique device name 639 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 640 String id = Settings.Secure.getString(context.getContentResolver(), 641 Settings.Secure.ANDROID_ID); 642 if (id != null && id.length() > 0) { 643 String name = new String("android-").concat(id); 644 SystemProperties.set("net.hostname", name); 645 } 646 } 647 648 // read our default dns server ip 649 String dns = Settings.Global.getString(context.getContentResolver(), 650 Settings.Global.DEFAULT_DNS_SERVER); 651 if (dns == null || dns.length() == 0) { 652 dns = context.getResources().getString( 653 com.android.internal.R.string.config_default_dns_server); 654 } 655 try { 656 mDefaultDns = NetworkUtils.numericToInetAddress(dns); 657 } catch (IllegalArgumentException e) { 658 loge("Error setting defaultDns using " + dns); 659 } 660 661 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 662 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 663 664 mContext = checkNotNull(context, "missing Context"); 665 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 666 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 667 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 668 mKeyStore = KeyStore.getInstance(); 669 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 670 671 try { 672 mPolicyManager.registerListener(mPolicyListener); 673 } catch (RemoteException e) { 674 // ouch, no rules updates means some processes may never get network 675 loge("unable to register INetworkPolicyListener" + e.toString()); 676 } 677 678 final PowerManager powerManager = (PowerManager) context.getSystemService( 679 Context.POWER_SERVICE); 680 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 681 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 682 com.android.internal.R.integer.config_networkTransitionTimeout); 683 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 684 685 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 686 687 // TODO: What is the "correct" way to do determine if this is a wifi only device? 688 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 689 log("wifiOnly=" + wifiOnly); 690 String[] naStrings = context.getResources().getStringArray( 691 com.android.internal.R.array.networkAttributes); 692 for (String naString : naStrings) { 693 try { 694 NetworkConfig n = new NetworkConfig(naString); 695 if (VDBG) log("naString=" + naString + " config=" + n); 696 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 697 loge("Error in networkAttributes - ignoring attempt to define type " + 698 n.type); 699 continue; 700 } 701 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 702 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 703 n.type); 704 continue; 705 } 706 if (mNetConfigs[n.type] != null) { 707 loge("Error in networkAttributes - ignoring attempt to redefine type " + 708 n.type); 709 continue; 710 } 711 mLegacyTypeTracker.addSupportedType(n.type); 712 713 mNetConfigs[n.type] = n; 714 mNetworksDefined++; 715 } catch(Exception e) { 716 // ignore it - leave the entry null 717 } 718 } 719 720 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 721 if (mNetConfigs[TYPE_VPN] == null) { 722 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 723 // don't need to add TYPE_VPN to mNetConfigs. 724 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 725 mNetworksDefined++; // used only in the log() statement below. 726 } 727 728 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 729 730 mProtectedNetworks = new ArrayList<Integer>(); 731 int[] protectedNetworks = context.getResources().getIntArray( 732 com.android.internal.R.array.config_protectedNetworks); 733 for (int p : protectedNetworks) { 734 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 735 mProtectedNetworks.add(p); 736 } else { 737 if (DBG) loge("Ignoring protectedNetwork " + p); 738 } 739 } 740 741 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 742 && SystemProperties.get("ro.build.type").equals("eng"); 743 744 mTethering = new Tethering(mContext, mNetd, statsService); 745 746 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 747 748 //set up the listener for user state for creating user VPNs 749 IntentFilter intentFilter = new IntentFilter(); 750 intentFilter.addAction(Intent.ACTION_USER_STARTING); 751 intentFilter.addAction(Intent.ACTION_USER_STOPPING); 752 intentFilter.addAction(Intent.ACTION_USER_ADDED); 753 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 754 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 755 mContext.registerReceiverAsUser( 756 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 757 758 try { 759 mNetd.registerObserver(mTethering); 760 mNetd.registerObserver(mDataActivityObserver); 761 } catch (RemoteException e) { 762 loge("Error registering observer :" + e); 763 } 764 765 if (DBG) { 766 mInetLog = new ArrayList(); 767 } 768 769 mSettingsObserver = new SettingsObserver(mContext, mHandler); 770 registerSettingsCallbacks(); 771 772 mDataConnectionStats = new DataConnectionStats(mContext); 773 mDataConnectionStats.startMonitoring(); 774 775 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 776 777 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 778 779 mKeepaliveTracker = new KeepaliveTracker(mHandler); 780 } 781 782 private NetworkRequest createInternetRequestForTransport(int transportType) { 783 NetworkCapabilities netCap = new NetworkCapabilities(); 784 netCap.addCapability(NET_CAPABILITY_INTERNET); 785 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 786 if (transportType > -1) { 787 netCap.addTransportType(transportType); 788 } 789 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 790 } 791 792 private void handleMobileDataAlwaysOn() { 793 final boolean enable = (Settings.Global.getInt( 794 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 795 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 796 if (enable == isEnabled) { 797 return; // Nothing to do. 798 } 799 800 if (enable) { 801 handleRegisterNetworkRequest(new NetworkRequestInfo( 802 null, mDefaultMobileDataRequest, new Binder(), NetworkRequestType.REQUEST)); 803 } else { 804 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 805 } 806 } 807 808 private void registerSettingsCallbacks() { 809 // Watch for global HTTP proxy changes. 810 mSettingsObserver.observe( 811 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 812 EVENT_APPLY_GLOBAL_HTTP_PROXY); 813 814 // Watch for whether or not to keep mobile data always on. 815 mSettingsObserver.observe( 816 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 817 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 818 } 819 820 private synchronized int nextNetworkRequestId() { 821 return mNextNetworkRequestId++; 822 } 823 824 @VisibleForTesting 825 protected int reserveNetId() { 826 synchronized (mNetworkForNetId) { 827 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 828 int netId = mNextNetId; 829 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 830 // Make sure NetID unused. http://b/16815182 831 if (!mNetIdInUse.get(netId)) { 832 mNetIdInUse.put(netId, true); 833 return netId; 834 } 835 } 836 } 837 throw new IllegalStateException("No free netIds"); 838 } 839 840 private NetworkState getFilteredNetworkState(int networkType, int uid) { 841 NetworkInfo info = null; 842 LinkProperties lp = null; 843 NetworkCapabilities nc = null; 844 Network network = null; 845 String subscriberId = null; 846 847 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 848 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 849 if (nai != null) { 850 synchronized (nai) { 851 info = new NetworkInfo(nai.networkInfo); 852 lp = new LinkProperties(nai.linkProperties); 853 nc = new NetworkCapabilities(nai.networkCapabilities); 854 // Network objects are outwardly immutable so there is no point to duplicating. 855 // Duplicating also precludes sharing socket factories and connection pools. 856 network = nai.network; 857 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 858 } 859 info.setType(networkType); 860 } else { 861 info = new NetworkInfo(networkType, 0, getNetworkTypeName(networkType), ""); 862 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 863 info.setIsAvailable(true); 864 lp = new LinkProperties(); 865 nc = new NetworkCapabilities(); 866 network = null; 867 } 868 info = getFilteredNetworkInfo(info, lp, uid); 869 } 870 871 return new NetworkState(info, lp, nc, network, subscriberId, null); 872 } 873 874 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 875 if (network == null) { 876 return null; 877 } 878 synchronized (mNetworkForNetId) { 879 return mNetworkForNetId.get(network.netId); 880 } 881 }; 882 883 private Network[] getVpnUnderlyingNetworks(int uid) { 884 if (!mLockdownEnabled) { 885 int user = UserHandle.getUserId(uid); 886 synchronized (mVpns) { 887 Vpn vpn = mVpns.get(user); 888 if (vpn != null && vpn.appliesToUid(uid)) { 889 return vpn.getUnderlyingNetworks(); 890 } 891 } 892 } 893 return null; 894 } 895 896 private NetworkState getUnfilteredActiveNetworkState(int uid) { 897 NetworkInfo info = null; 898 LinkProperties lp = null; 899 NetworkCapabilities nc = null; 900 Network network = null; 901 String subscriberId = null; 902 903 NetworkAgentInfo nai = getDefaultNetwork(); 904 905 final Network[] networks = getVpnUnderlyingNetworks(uid); 906 if (networks != null) { 907 // getUnderlyingNetworks() returns: 908 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 909 // empty array => the VPN explicitly said "no default network". 910 // non-empty array => the VPN specified one or more default networks; we use the 911 // first one. 912 if (networks.length > 0) { 913 nai = getNetworkAgentInfoForNetwork(networks[0]); 914 } else { 915 nai = null; 916 } 917 } 918 919 if (nai != null) { 920 synchronized (nai) { 921 info = new NetworkInfo(nai.networkInfo); 922 lp = new LinkProperties(nai.linkProperties); 923 nc = new NetworkCapabilities(nai.networkCapabilities); 924 // Network objects are outwardly immutable so there is no point to duplicating. 925 // Duplicating also precludes sharing socket factories and connection pools. 926 network = nai.network; 927 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 928 } 929 } 930 931 return new NetworkState(info, lp, nc, network, subscriberId, null); 932 } 933 934 /** 935 * Check if UID should be blocked from using the network with the given LinkProperties. 936 */ 937 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 938 final boolean networkCostly; 939 final int uidRules; 940 941 final String iface = (lp == null ? "" : lp.getInterfaceName()); 942 synchronized (mRulesLock) { 943 networkCostly = mMeteredIfaces.contains(iface); 944 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 945 } 946 947 if (uidRules == RULE_REJECT_ALL) { 948 return true; 949 } else if ((uidRules == RULE_REJECT_METERED) && networkCostly) { 950 return true; 951 } else { 952 return false; 953 } 954 } 955 956 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 957 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) return; 958 boolean removed = false; 959 boolean added = false; 960 synchronized (mBlockedAppUids) { 961 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 962 added = true; 963 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 964 removed = true; 965 } 966 } 967 if (added) log("Returning blocked NetworkInfo to uid=" + uid); 968 else if (removed) log("Returning unblocked NetworkInfo to uid=" + uid); 969 } 970 971 /** 972 * Return a filtered {@link NetworkInfo}, potentially marked 973 * {@link DetailedState#BLOCKED} based on 974 * {@link #isNetworkWithLinkPropertiesBlocked}. 975 */ 976 private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, LinkProperties lp, int uid) { 977 if (info != null && isNetworkWithLinkPropertiesBlocked(lp, uid)) { 978 // network is blocked; clone and override state 979 info = new NetworkInfo(info); 980 info.setDetailedState(DetailedState.BLOCKED, null, null); 981 } 982 if (info != null && mLockdownTracker != null) { 983 info = mLockdownTracker.augmentNetworkInfo(info); 984 if (VDBG) log("returning Locked NetworkInfo"); 985 } 986 return info; 987 } 988 989 /** 990 * Return NetworkInfo for the active (i.e., connected) network interface. 991 * It is assumed that at most one network is active at a time. If more 992 * than one is active, it is indeterminate which will be returned. 993 * @return the info for the active network, or {@code null} if none is 994 * active 995 */ 996 @Override 997 public NetworkInfo getActiveNetworkInfo() { 998 enforceAccessPermission(); 999 final int uid = Binder.getCallingUid(); 1000 NetworkState state = getUnfilteredActiveNetworkState(uid); 1001 NetworkInfo ni = getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1002 maybeLogBlockedNetworkInfo(ni, uid); 1003 return ni; 1004 } 1005 1006 @Override 1007 public Network getActiveNetwork() { 1008 enforceAccessPermission(); 1009 return getActiveNetworkForUidInternal(Binder.getCallingUid()); 1010 } 1011 1012 @Override 1013 public Network getActiveNetworkForUid(int uid) { 1014 enforceConnectivityInternalPermission(); 1015 return getActiveNetworkForUidInternal(uid); 1016 } 1017 1018 private Network getActiveNetworkForUidInternal(final int uid) { 1019 final int user = UserHandle.getUserId(uid); 1020 int vpnNetId = NETID_UNSET; 1021 synchronized (mVpns) { 1022 final Vpn vpn = mVpns.get(user); 1023 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1024 } 1025 NetworkAgentInfo nai; 1026 if (vpnNetId != NETID_UNSET) { 1027 synchronized (mNetworkForNetId) { 1028 nai = mNetworkForNetId.get(vpnNetId); 1029 } 1030 if (nai != null) return nai.network; 1031 } 1032 nai = getDefaultNetwork(); 1033 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 1034 return nai != null ? nai.network : null; 1035 } 1036 1037 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1038 enforceAccessPermission(); 1039 final int uid = Binder.getCallingUid(); 1040 NetworkState state = getUnfilteredActiveNetworkState(uid); 1041 return state.networkInfo; 1042 } 1043 1044 @Override 1045 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 1046 enforceConnectivityInternalPermission(); 1047 NetworkState state = getUnfilteredActiveNetworkState(uid); 1048 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1049 } 1050 1051 @Override 1052 public NetworkInfo getNetworkInfo(int networkType) { 1053 enforceAccessPermission(); 1054 final int uid = Binder.getCallingUid(); 1055 if (getVpnUnderlyingNetworks(uid) != null) { 1056 // A VPN is active, so we may need to return one of its underlying networks. This 1057 // information is not available in LegacyTypeTracker, so we have to get it from 1058 // getUnfilteredActiveNetworkState. 1059 NetworkState state = getUnfilteredActiveNetworkState(uid); 1060 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1061 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1062 } 1063 } 1064 NetworkState state = getFilteredNetworkState(networkType, uid); 1065 return state.networkInfo; 1066 } 1067 1068 @Override 1069 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1070 enforceAccessPermission(); 1071 final int uid = Binder.getCallingUid(); 1072 NetworkInfo info = null; 1073 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1074 if (nai != null) { 1075 synchronized (nai) { 1076 info = new NetworkInfo(nai.networkInfo); 1077 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1078 } 1079 } 1080 return info; 1081 } 1082 1083 @Override 1084 public NetworkInfo[] getAllNetworkInfo() { 1085 enforceAccessPermission(); 1086 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1087 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1088 networkType++) { 1089 NetworkInfo info = getNetworkInfo(networkType); 1090 if (info != null) { 1091 result.add(info); 1092 } 1093 } 1094 return result.toArray(new NetworkInfo[result.size()]); 1095 } 1096 1097 @Override 1098 public Network getNetworkForType(int networkType) { 1099 enforceAccessPermission(); 1100 final int uid = Binder.getCallingUid(); 1101 NetworkState state = getFilteredNetworkState(networkType, uid); 1102 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1103 return state.network; 1104 } 1105 return null; 1106 } 1107 1108 @Override 1109 public Network[] getAllNetworks() { 1110 enforceAccessPermission(); 1111 synchronized (mNetworkForNetId) { 1112 final Network[] result = new Network[mNetworkForNetId.size()]; 1113 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1114 result[i] = mNetworkForNetId.valueAt(i).network; 1115 } 1116 return result; 1117 } 1118 } 1119 1120 @Override 1121 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1122 // The basic principle is: if an app's traffic could possibly go over a 1123 // network, without the app doing anything multinetwork-specific, 1124 // (hence, by "default"), then include that network's capabilities in 1125 // the array. 1126 // 1127 // In the normal case, app traffic only goes over the system's default 1128 // network connection, so that's the only network returned. 1129 // 1130 // With a VPN in force, some app traffic may go into the VPN, and thus 1131 // over whatever underlying networks the VPN specifies, while other app 1132 // traffic may go over the system default network (e.g.: a split-tunnel 1133 // VPN, or an app disallowed by the VPN), so the set of networks 1134 // returned includes the VPN's underlying networks and the system 1135 // default. 1136 enforceAccessPermission(); 1137 1138 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1139 1140 NetworkAgentInfo nai = getDefaultNetwork(); 1141 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1142 if (nc != null) { 1143 result.put(nai.network, nc); 1144 } 1145 1146 if (!mLockdownEnabled) { 1147 synchronized (mVpns) { 1148 Vpn vpn = mVpns.get(userId); 1149 if (vpn != null) { 1150 Network[] networks = vpn.getUnderlyingNetworks(); 1151 if (networks != null) { 1152 for (Network network : networks) { 1153 nai = getNetworkAgentInfoForNetwork(network); 1154 nc = getNetworkCapabilitiesInternal(nai); 1155 if (nc != null) { 1156 result.put(network, nc); 1157 } 1158 } 1159 } 1160 } 1161 } 1162 } 1163 1164 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1165 out = result.values().toArray(out); 1166 return out; 1167 } 1168 1169 @Override 1170 public boolean isNetworkSupported(int networkType) { 1171 enforceAccessPermission(); 1172 return mLegacyTypeTracker.isTypeSupported(networkType); 1173 } 1174 1175 /** 1176 * Return LinkProperties for the active (i.e., connected) default 1177 * network interface. It is assumed that at most one default network 1178 * is active at a time. If more than one is active, it is indeterminate 1179 * which will be returned. 1180 * @return the ip properties for the active network, or {@code null} if 1181 * none is active 1182 */ 1183 @Override 1184 public LinkProperties getActiveLinkProperties() { 1185 enforceAccessPermission(); 1186 final int uid = Binder.getCallingUid(); 1187 NetworkState state = getUnfilteredActiveNetworkState(uid); 1188 return state.linkProperties; 1189 } 1190 1191 @Override 1192 public LinkProperties getLinkPropertiesForType(int networkType) { 1193 enforceAccessPermission(); 1194 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1195 if (nai != null) { 1196 synchronized (nai) { 1197 return new LinkProperties(nai.linkProperties); 1198 } 1199 } 1200 return null; 1201 } 1202 1203 // TODO - this should be ALL networks 1204 @Override 1205 public LinkProperties getLinkProperties(Network network) { 1206 enforceAccessPermission(); 1207 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1208 if (nai != null) { 1209 synchronized (nai) { 1210 return new LinkProperties(nai.linkProperties); 1211 } 1212 } 1213 return null; 1214 } 1215 1216 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1217 if (nai != null) { 1218 synchronized (nai) { 1219 if (nai.networkCapabilities != null) { 1220 return new NetworkCapabilities(nai.networkCapabilities); 1221 } 1222 } 1223 } 1224 return null; 1225 } 1226 1227 @Override 1228 public NetworkCapabilities getNetworkCapabilities(Network network) { 1229 enforceAccessPermission(); 1230 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1231 } 1232 1233 @Override 1234 public NetworkState[] getAllNetworkState() { 1235 // Require internal since we're handing out IMSI details 1236 enforceConnectivityInternalPermission(); 1237 1238 final ArrayList<NetworkState> result = Lists.newArrayList(); 1239 for (Network network : getAllNetworks()) { 1240 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1241 if (nai != null) { 1242 synchronized (nai) { 1243 final String subscriberId = (nai.networkMisc != null) 1244 ? nai.networkMisc.subscriberId : null; 1245 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1246 nai.networkCapabilities, network, subscriberId, null)); 1247 } 1248 } 1249 } 1250 return result.toArray(new NetworkState[result.size()]); 1251 } 1252 1253 @Override 1254 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1255 enforceAccessPermission(); 1256 final int uid = Binder.getCallingUid(); 1257 final long token = Binder.clearCallingIdentity(); 1258 try { 1259 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1260 if (state.networkInfo != null) { 1261 try { 1262 return mPolicyManager.getNetworkQuotaInfo(state); 1263 } catch (RemoteException e) { 1264 } 1265 } 1266 return null; 1267 } finally { 1268 Binder.restoreCallingIdentity(token); 1269 } 1270 } 1271 1272 @Override 1273 public boolean isActiveNetworkMetered() { 1274 enforceAccessPermission(); 1275 final int uid = Binder.getCallingUid(); 1276 final long token = Binder.clearCallingIdentity(); 1277 try { 1278 return isActiveNetworkMeteredUnchecked(uid); 1279 } finally { 1280 Binder.restoreCallingIdentity(token); 1281 } 1282 } 1283 1284 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1285 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1286 if (state.networkInfo != null) { 1287 try { 1288 return mPolicyManager.isNetworkMetered(state); 1289 } catch (RemoteException e) { 1290 } 1291 } 1292 return false; 1293 } 1294 1295 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1296 @Override 1297 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1298 int deviceType = Integer.parseInt(label); 1299 sendDataActivityBroadcast(deviceType, active, tsNanos); 1300 } 1301 }; 1302 1303 /** 1304 * Ensure that a network route exists to deliver traffic to the specified 1305 * host via the specified network interface. 1306 * @param networkType the type of the network over which traffic to the 1307 * specified host is to be routed 1308 * @param hostAddress the IP address of the host to which the route is 1309 * desired 1310 * @return {@code true} on success, {@code false} on failure 1311 */ 1312 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1313 enforceChangePermission(); 1314 if (mProtectedNetworks.contains(networkType)) { 1315 enforceConnectivityInternalPermission(); 1316 } 1317 1318 InetAddress addr; 1319 try { 1320 addr = InetAddress.getByAddress(hostAddress); 1321 } catch (UnknownHostException e) { 1322 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1323 return false; 1324 } 1325 1326 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1327 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1328 return false; 1329 } 1330 1331 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1332 if (nai == null) { 1333 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1334 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1335 } else { 1336 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1337 } 1338 return false; 1339 } 1340 1341 DetailedState netState; 1342 synchronized (nai) { 1343 netState = nai.networkInfo.getDetailedState(); 1344 } 1345 1346 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1347 if (VDBG) { 1348 log("requestRouteToHostAddress on down network " 1349 + "(" + networkType + ") - dropped" 1350 + " netState=" + netState); 1351 } 1352 return false; 1353 } 1354 1355 final int uid = Binder.getCallingUid(); 1356 final long token = Binder.clearCallingIdentity(); 1357 try { 1358 LinkProperties lp; 1359 int netId; 1360 synchronized (nai) { 1361 lp = nai.linkProperties; 1362 netId = nai.network.netId; 1363 } 1364 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1365 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1366 return ok; 1367 } finally { 1368 Binder.restoreCallingIdentity(token); 1369 } 1370 } 1371 1372 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1373 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1374 if (bestRoute == null) { 1375 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1376 } else { 1377 String iface = bestRoute.getInterface(); 1378 if (bestRoute.getGateway().equals(addr)) { 1379 // if there is no better route, add the implied hostroute for our gateway 1380 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1381 } else { 1382 // if we will connect to this through another route, add a direct route 1383 // to it's gateway 1384 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1385 } 1386 } 1387 if (DBG) log("Adding legacy route " + bestRoute + 1388 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1389 try { 1390 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1391 } catch (Exception e) { 1392 // never crash - catch them all 1393 if (DBG) loge("Exception trying to add a route: " + e); 1394 return false; 1395 } 1396 return true; 1397 } 1398 1399 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1400 @Override 1401 public void onUidRulesChanged(int uid, int uidRules) { 1402 // caller is NPMS, since we only register with them 1403 if (LOGD_RULES) { 1404 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1405 } 1406 1407 synchronized (mRulesLock) { 1408 // skip update when we've already applied rules 1409 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1410 if (oldRules == uidRules) return; 1411 1412 mUidRules.put(uid, uidRules); 1413 } 1414 1415 // TODO: notify UID when it has requested targeted updates 1416 } 1417 1418 @Override 1419 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1420 // caller is NPMS, since we only register with them 1421 if (LOGD_RULES) { 1422 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1423 } 1424 1425 synchronized (mRulesLock) { 1426 mMeteredIfaces.clear(); 1427 for (String iface : meteredIfaces) { 1428 mMeteredIfaces.add(iface); 1429 } 1430 } 1431 } 1432 1433 @Override 1434 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1435 // caller is NPMS, since we only register with them 1436 if (LOGD_RULES) { 1437 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1438 } 1439 } 1440 }; 1441 1442 /** 1443 * Require that the caller is either in the same user or has appropriate permission to interact 1444 * across users. 1445 * 1446 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1447 */ 1448 private void enforceCrossUserPermission(int userId) { 1449 if (userId == UserHandle.getCallingUserId()) { 1450 // Not a cross-user call. 1451 return; 1452 } 1453 mContext.enforceCallingOrSelfPermission( 1454 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1455 "ConnectivityService"); 1456 } 1457 1458 private void enforceInternetPermission() { 1459 mContext.enforceCallingOrSelfPermission( 1460 android.Manifest.permission.INTERNET, 1461 "ConnectivityService"); 1462 } 1463 1464 private void enforceAccessPermission() { 1465 mContext.enforceCallingOrSelfPermission( 1466 android.Manifest.permission.ACCESS_NETWORK_STATE, 1467 "ConnectivityService"); 1468 } 1469 1470 private void enforceChangePermission() { 1471 ConnectivityManager.enforceChangePermission(mContext); 1472 } 1473 1474 private void enforceTetherAccessPermission() { 1475 mContext.enforceCallingOrSelfPermission( 1476 android.Manifest.permission.ACCESS_NETWORK_STATE, 1477 "ConnectivityService"); 1478 } 1479 1480 private void enforceConnectivityInternalPermission() { 1481 mContext.enforceCallingOrSelfPermission( 1482 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1483 "ConnectivityService"); 1484 } 1485 1486 private void enforceKeepalivePermission() { 1487 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1488 } 1489 1490 public void sendConnectedBroadcast(NetworkInfo info) { 1491 enforceConnectivityInternalPermission(); 1492 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1493 } 1494 1495 private void sendInetConditionBroadcast(NetworkInfo info) { 1496 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1497 } 1498 1499 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1500 if (mLockdownTracker != null) { 1501 info = mLockdownTracker.augmentNetworkInfo(info); 1502 } 1503 1504 Intent intent = new Intent(bcastType); 1505 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1506 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1507 if (info.isFailover()) { 1508 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1509 info.setFailover(false); 1510 } 1511 if (info.getReason() != null) { 1512 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1513 } 1514 if (info.getExtraInfo() != null) { 1515 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1516 info.getExtraInfo()); 1517 } 1518 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1519 return intent; 1520 } 1521 1522 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1523 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1524 } 1525 1526 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1527 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1528 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1529 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1530 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1531 final long ident = Binder.clearCallingIdentity(); 1532 try { 1533 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1534 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1535 } finally { 1536 Binder.restoreCallingIdentity(ident); 1537 } 1538 } 1539 1540 private void sendStickyBroadcast(Intent intent) { 1541 synchronized(this) { 1542 if (!mSystemReady) { 1543 mInitialBroadcast = new Intent(intent); 1544 } 1545 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1546 if (DBG) { 1547 log("sendStickyBroadcast: action=" + intent.getAction()); 1548 } 1549 1550 Bundle options = null; 1551 final long ident = Binder.clearCallingIdentity(); 1552 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1553 final NetworkInfo ni = intent.getParcelableExtra( 1554 ConnectivityManager.EXTRA_NETWORK_INFO); 1555 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1556 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1557 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1558 } else { 1559 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1560 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1561 options = opts.toBundle(); 1562 } 1563 final IBatteryStats bs = BatteryStatsService.getService(); 1564 try { 1565 bs.noteConnectivityChanged(intent.getIntExtra( 1566 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1567 ni != null ? ni.getState().toString() : "?"); 1568 } catch (RemoteException e) { 1569 } 1570 } 1571 try { 1572 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1573 } finally { 1574 Binder.restoreCallingIdentity(ident); 1575 } 1576 } 1577 } 1578 1579 void systemReady() { 1580 loadGlobalProxy(); 1581 1582 synchronized(this) { 1583 mSystemReady = true; 1584 if (mInitialBroadcast != null) { 1585 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1586 mInitialBroadcast = null; 1587 } 1588 } 1589 // load the global proxy at startup 1590 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1591 1592 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1593 // for user to unlock device too. 1594 updateLockdownVpn(); 1595 1596 // Configure whether mobile data is always on. 1597 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1598 1599 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1600 1601 mPermissionMonitor.startMonitoring(); 1602 } 1603 1604 /** 1605 * Setup data activity tracking for the given network. 1606 * 1607 * Every {@code setupDataActivityTracking} should be paired with a 1608 * {@link #removeDataActivityTracking} for cleanup. 1609 */ 1610 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1611 final String iface = networkAgent.linkProperties.getInterfaceName(); 1612 1613 final int timeout; 1614 int type = ConnectivityManager.TYPE_NONE; 1615 1616 if (networkAgent.networkCapabilities.hasTransport( 1617 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1618 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1619 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1620 10); 1621 type = ConnectivityManager.TYPE_MOBILE; 1622 } else if (networkAgent.networkCapabilities.hasTransport( 1623 NetworkCapabilities.TRANSPORT_WIFI)) { 1624 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1625 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1626 15); 1627 type = ConnectivityManager.TYPE_WIFI; 1628 } else { 1629 // do not track any other networks 1630 timeout = 0; 1631 } 1632 1633 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1634 try { 1635 mNetd.addIdleTimer(iface, timeout, type); 1636 } catch (Exception e) { 1637 // You shall not crash! 1638 loge("Exception in setupDataActivityTracking " + e); 1639 } 1640 } 1641 } 1642 1643 /** 1644 * Remove data activity tracking when network disconnects. 1645 */ 1646 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1647 final String iface = networkAgent.linkProperties.getInterfaceName(); 1648 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1649 1650 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1651 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1652 try { 1653 // the call fails silently if no idletimer setup for this interface 1654 mNetd.removeIdleTimer(iface); 1655 } catch (Exception e) { 1656 loge("Exception in removeDataActivityTracking " + e); 1657 } 1658 } 1659 } 1660 1661 /** 1662 * Reads the network specific MTU size from reources. 1663 * and set it on it's iface. 1664 */ 1665 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1666 final String iface = newLp.getInterfaceName(); 1667 final int mtu = newLp.getMtu(); 1668 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1669 if (VDBG) log("identical MTU - not setting"); 1670 return; 1671 } 1672 1673 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1674 loge("Unexpected mtu value: " + mtu + ", " + iface); 1675 return; 1676 } 1677 1678 // Cannot set MTU without interface name 1679 if (TextUtils.isEmpty(iface)) { 1680 loge("Setting MTU size with null iface."); 1681 return; 1682 } 1683 1684 try { 1685 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1686 mNetd.setMtu(iface, mtu); 1687 } catch (Exception e) { 1688 Slog.e(TAG, "exception in setMtu()" + e); 1689 } 1690 } 1691 1692 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1693 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1694 1695 // Overridden for testing purposes to avoid writing to SystemProperties. 1696 @VisibleForTesting 1697 protected int getDefaultTcpRwnd() { 1698 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1699 } 1700 1701 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1702 if (isDefaultNetwork(nai) == false) { 1703 return; 1704 } 1705 1706 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1707 String[] values = null; 1708 if (tcpBufferSizes != null) { 1709 values = tcpBufferSizes.split(","); 1710 } 1711 1712 if (values == null || values.length != 6) { 1713 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1714 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1715 values = tcpBufferSizes.split(","); 1716 } 1717 1718 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1719 1720 try { 1721 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1722 1723 final String prefix = "/sys/kernel/ipv4/tcp_"; 1724 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1725 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1726 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1727 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1728 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1729 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1730 mCurrentTcpBufferSizes = tcpBufferSizes; 1731 } catch (IOException e) { 1732 loge("Can't set TCP buffer sizes:" + e); 1733 } 1734 1735 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1736 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1737 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1738 if (rwndValue != 0) { 1739 SystemProperties.set(sysctlKey, rwndValue.toString()); 1740 } 1741 } 1742 1743 private void flushVmDnsCache() { 1744 /* 1745 * Tell the VMs to toss their DNS caches 1746 */ 1747 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1748 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1749 /* 1750 * Connectivity events can happen before boot has completed ... 1751 */ 1752 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1753 final long ident = Binder.clearCallingIdentity(); 1754 try { 1755 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1756 } finally { 1757 Binder.restoreCallingIdentity(ident); 1758 } 1759 } 1760 1761 @Override 1762 public int getRestoreDefaultNetworkDelay(int networkType) { 1763 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1764 NETWORK_RESTORE_DELAY_PROP_NAME); 1765 if(restoreDefaultNetworkDelayStr != null && 1766 restoreDefaultNetworkDelayStr.length() != 0) { 1767 try { 1768 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1769 } catch (NumberFormatException e) { 1770 } 1771 } 1772 // if the system property isn't set, use the value for the apn type 1773 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1774 1775 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1776 (mNetConfigs[networkType] != null)) { 1777 ret = mNetConfigs[networkType].restoreTime; 1778 } 1779 return ret; 1780 } 1781 1782 private boolean argsContain(String[] args, String target) { 1783 for (String arg : args) { 1784 if (arg.equals(target)) return true; 1785 } 1786 return false; 1787 } 1788 1789 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1790 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1791 final long DIAG_TIME_MS = 5000; 1792 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1793 // Start gathering diagnostic information. 1794 netDiags.add(new NetworkDiagnostics( 1795 nai.network, 1796 new LinkProperties(nai.linkProperties), // Must be a copy. 1797 DIAG_TIME_MS)); 1798 } 1799 1800 for (NetworkDiagnostics netDiag : netDiags) { 1801 pw.println(); 1802 netDiag.waitForMeasurements(); 1803 netDiag.dump(pw); 1804 } 1805 } 1806 1807 @Override 1808 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1809 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1810 if (mContext.checkCallingOrSelfPermission( 1811 android.Manifest.permission.DUMP) 1812 != PackageManager.PERMISSION_GRANTED) { 1813 pw.println("Permission Denial: can't dump ConnectivityService " + 1814 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1815 Binder.getCallingUid()); 1816 return; 1817 } 1818 1819 if (argsContain(args, "--diag")) { 1820 dumpNetworkDiagnostics(pw); 1821 return; 1822 } 1823 1824 pw.print("NetworkFactories for:"); 1825 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1826 pw.print(" " + nfi.name); 1827 } 1828 pw.println(); 1829 pw.println(); 1830 1831 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1832 pw.print("Active default network: "); 1833 if (defaultNai == null) { 1834 pw.println("none"); 1835 } else { 1836 pw.println(defaultNai.network.netId); 1837 } 1838 pw.println(); 1839 1840 pw.println("Current Networks:"); 1841 pw.increaseIndent(); 1842 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1843 pw.println(nai.toString()); 1844 pw.increaseIndent(); 1845 pw.println("Requests:"); 1846 pw.increaseIndent(); 1847 for (int i = 0; i < nai.networkRequests.size(); i++) { 1848 pw.println(nai.networkRequests.valueAt(i).toString()); 1849 } 1850 pw.decreaseIndent(); 1851 pw.println("Lingered:"); 1852 pw.increaseIndent(); 1853 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1854 pw.decreaseIndent(); 1855 pw.decreaseIndent(); 1856 } 1857 pw.decreaseIndent(); 1858 pw.println(); 1859 1860 pw.println("Network Requests:"); 1861 pw.increaseIndent(); 1862 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1863 pw.println(nri.toString()); 1864 } 1865 pw.println(); 1866 pw.decreaseIndent(); 1867 1868 mLegacyTypeTracker.dump(pw); 1869 1870 synchronized (this) { 1871 pw.print("mNetTransitionWakeLock: currently " + 1872 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1873 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1874 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1875 } else { 1876 pw.println(", last requested never"); 1877 } 1878 } 1879 1880 pw.println(); 1881 mTethering.dump(fd, pw, args); 1882 1883 pw.println(); 1884 mKeepaliveTracker.dump(pw); 1885 1886 pw.println(); 1887 1888 if (mInetLog != null && mInetLog.size() > 0) { 1889 pw.println(); 1890 pw.println("Inet condition reports:"); 1891 pw.increaseIndent(); 1892 for(int i = 0; i < mInetLog.size(); i++) { 1893 pw.println(mInetLog.get(i)); 1894 } 1895 pw.decreaseIndent(); 1896 } 1897 1898 if (argsContain(args, "--short") == false) { 1899 pw.println(); 1900 synchronized (mValidationLogs) { 1901 pw.println("mValidationLogs (most recent first):"); 1902 for (Pair<Network,ReadOnlyLocalLog> p : mValidationLogs) { 1903 pw.println(p.first); 1904 pw.increaseIndent(); 1905 p.second.dump(fd, pw, args); 1906 pw.decreaseIndent(); 1907 } 1908 } 1909 1910 pw.println(); 1911 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1912 pw.increaseIndent(); 1913 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1914 pw.decreaseIndent(); 1915 } 1916 } 1917 1918 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, String msg) { 1919 if (nai.network == null) return false; 1920 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1921 if (officialNai != null && officialNai.equals(nai)) return true; 1922 if (officialNai != null || VDBG) { 1923 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1924 " - " + nai); 1925 } 1926 return false; 1927 } 1928 1929 private boolean isRequest(NetworkRequest request) { 1930 return mNetworkRequests.get(request).isRequest(); 1931 } 1932 1933 // must be stateless - things change under us. 1934 private class NetworkStateTrackerHandler extends Handler { 1935 public NetworkStateTrackerHandler(Looper looper) { 1936 super(looper); 1937 } 1938 1939 @Override 1940 public void handleMessage(Message msg) { 1941 NetworkInfo info; 1942 switch (msg.what) { 1943 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1944 handleAsyncChannelHalfConnect(msg); 1945 break; 1946 } 1947 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1948 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1949 if (nai != null) nai.asyncChannel.disconnect(); 1950 break; 1951 } 1952 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1953 handleAsyncChannelDisconnected(msg); 1954 break; 1955 } 1956 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1957 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1958 if (nai == null) { 1959 loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent"); 1960 } else { 1961 final NetworkCapabilities networkCapabilities = 1962 (NetworkCapabilities)msg.obj; 1963 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 1964 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 1965 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 1966 } 1967 if (nai.created && !nai.networkCapabilities.equalImmutableCapabilities( 1968 networkCapabilities)) { 1969 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 1970 + nai.networkCapabilities + " -> " + networkCapabilities); 1971 } 1972 updateCapabilities(nai, networkCapabilities); 1973 } 1974 break; 1975 } 1976 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1977 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1978 if (nai == null) { 1979 loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED"); 1980 } else { 1981 if (VDBG) { 1982 log("Update of LinkProperties for " + nai.name() + 1983 "; created=" + nai.created); 1984 } 1985 LinkProperties oldLp = nai.linkProperties; 1986 synchronized (nai) { 1987 nai.linkProperties = (LinkProperties)msg.obj; 1988 } 1989 if (nai.created) updateLinkProperties(nai, oldLp); 1990 } 1991 break; 1992 } 1993 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1994 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1995 if (nai == null) { 1996 loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent"); 1997 break; 1998 } 1999 info = (NetworkInfo) msg.obj; 2000 updateNetworkInfo(nai, info); 2001 break; 2002 } 2003 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2004 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2005 if (nai == null) { 2006 loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent"); 2007 break; 2008 } 2009 Integer score = (Integer) msg.obj; 2010 if (score != null) updateNetworkScore(nai, score.intValue()); 2011 break; 2012 } 2013 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2014 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2015 if (nai == null) { 2016 loge("EVENT_UID_RANGES_ADDED from unknown NetworkAgent"); 2017 break; 2018 } 2019 try { 2020 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2021 } catch (Exception e) { 2022 // Never crash! 2023 loge("Exception in addVpnUidRanges: " + e); 2024 } 2025 break; 2026 } 2027 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2028 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2029 if (nai == null) { 2030 loge("EVENT_UID_RANGES_REMOVED from unknown NetworkAgent"); 2031 break; 2032 } 2033 try { 2034 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2035 } catch (Exception e) { 2036 // Never crash! 2037 loge("Exception in removeVpnUidRanges: " + e); 2038 } 2039 break; 2040 } 2041 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2042 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2043 if (nai == null) { 2044 loge("EVENT_SET_EXPLICITLY_SELECTED from unknown NetworkAgent"); 2045 break; 2046 } 2047 if (nai.created && !nai.networkMisc.explicitlySelected) { 2048 loge("ERROR: created network explicitly selected."); 2049 } 2050 nai.networkMisc.explicitlySelected = true; 2051 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2052 break; 2053 } 2054 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2055 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2056 if (nai == null) { 2057 loge("EVENT_PACKET_KEEPALIVE from unknown NetworkAgent"); 2058 break; 2059 } 2060 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2061 break; 2062 } 2063 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2064 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2065 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_TESTED")) { 2066 final boolean valid = 2067 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2068 if (DBG) log(nai.name() + " validation " + (valid ? " passed" : "failed")); 2069 if (valid != nai.lastValidated) { 2070 final int oldScore = nai.getCurrentScore(); 2071 nai.lastValidated = valid; 2072 nai.everValidated |= valid; 2073 updateCapabilities(nai, nai.networkCapabilities); 2074 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2075 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2076 } 2077 updateInetCondition(nai); 2078 // Let the NetworkAgent know the state of its network 2079 nai.asyncChannel.sendMessage( 2080 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2081 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2082 0, null); 2083 } 2084 break; 2085 } 2086 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 2087 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2088 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_LINGER_COMPLETE")) { 2089 handleLingerComplete(nai); 2090 } 2091 break; 2092 } 2093 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2094 final int netId = msg.arg2; 2095 final boolean visible = (msg.arg1 != 0); 2096 final NetworkAgentInfo nai; 2097 synchronized (mNetworkForNetId) { 2098 nai = mNetworkForNetId.get(netId); 2099 } 2100 // If captive portal status has changed, update capabilities. 2101 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2102 nai.lastCaptivePortalDetected = visible; 2103 nai.everCaptivePortalDetected |= visible; 2104 updateCapabilities(nai, nai.networkCapabilities); 2105 } 2106 if (!visible) { 2107 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2108 } else { 2109 if (nai == null) { 2110 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2111 break; 2112 } 2113 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2114 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2115 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2116 } 2117 break; 2118 } 2119 } 2120 } 2121 } 2122 2123 private void linger(NetworkAgentInfo nai) { 2124 nai.lingering = true; 2125 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 2126 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 2127 } 2128 2129 // Cancel any lingering so the linger timeout doesn't teardown a network. 2130 // This should be called when a network begins satisfying a NetworkRequest. 2131 // Note: depending on what state the NetworkMonitor is in (e.g., 2132 // if it's awaiting captive portal login, or if validation failed), this 2133 // may trigger a re-evaluation of the network. 2134 private void unlinger(NetworkAgentInfo nai) { 2135 nai.networkLingered.clear(); 2136 if (!nai.lingering) return; 2137 nai.lingering = false; 2138 if (VDBG) log("Canceling linger of " + nai.name()); 2139 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2140 } 2141 2142 private void handleAsyncChannelHalfConnect(Message msg) { 2143 AsyncChannel ac = (AsyncChannel) msg.obj; 2144 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2145 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2146 if (VDBG) log("NetworkFactory connected"); 2147 // A network factory has connected. Send it all current NetworkRequests. 2148 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2149 if (!nri.isRequest()) continue; 2150 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2151 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2152 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2153 } 2154 } else { 2155 loge("Error connecting NetworkFactory"); 2156 mNetworkFactoryInfos.remove(msg.obj); 2157 } 2158 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2159 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2160 if (VDBG) log("NetworkAgent connected"); 2161 // A network agent has requested a connection. Establish the connection. 2162 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2163 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2164 } else { 2165 loge("Error connecting NetworkAgent"); 2166 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2167 if (nai != null) { 2168 final boolean wasDefault = isDefaultNetwork(nai); 2169 synchronized (mNetworkForNetId) { 2170 mNetworkForNetId.remove(nai.network.netId); 2171 mNetIdInUse.delete(nai.network.netId); 2172 } 2173 // Just in case. 2174 mLegacyTypeTracker.remove(nai, wasDefault); 2175 } 2176 } 2177 } 2178 } 2179 2180 private void handleAsyncChannelDisconnected(Message msg) { 2181 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2182 if (nai != null) { 2183 if (DBG) { 2184 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2185 } 2186 // A network agent has disconnected. 2187 // TODO - if we move the logic to the network agent (have them disconnect 2188 // because they lost all their requests or because their score isn't good) 2189 // then they would disconnect organically, report their new state and then 2190 // disconnect the channel. 2191 if (nai.networkInfo.isConnected()) { 2192 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2193 null, null); 2194 } 2195 final boolean wasDefault = isDefaultNetwork(nai); 2196 if (wasDefault) { 2197 mDefaultInetConditionPublished = 0; 2198 } 2199 notifyIfacesChangedForNetworkStats(); 2200 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2201 // by other networks that are already connected. Perhaps that can be done by 2202 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2203 // of rematchAllNetworksAndRequests 2204 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2205 mKeepaliveTracker.handleStopAllKeepalives(nai, 2206 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2207 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2208 mNetworkAgentInfos.remove(msg.replyTo); 2209 updateClat(null, nai.linkProperties, nai); 2210 synchronized (mNetworkForNetId) { 2211 // Remove the NetworkAgent, but don't mark the netId as 2212 // available until we've told netd to delete it below. 2213 mNetworkForNetId.remove(nai.network.netId); 2214 } 2215 // Remove all previously satisfied requests. 2216 for (int i = 0; i < nai.networkRequests.size(); i++) { 2217 NetworkRequest request = nai.networkRequests.valueAt(i); 2218 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2219 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2220 mNetworkForRequestId.remove(request.requestId); 2221 sendUpdatedScoreToFactories(request, 0); 2222 } 2223 } 2224 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2225 removeDataActivityTracking(nai); 2226 notifyLockdownVpn(nai); 2227 requestNetworkTransitionWakelock(nai.name()); 2228 } 2229 mLegacyTypeTracker.remove(nai, wasDefault); 2230 rematchAllNetworksAndRequests(null, 0); 2231 if (nai.created) { 2232 // Tell netd to clean up the configuration for this network 2233 // (routing rules, DNS, etc). 2234 // This may be slow as it requires a lot of netd shelling out to ip and 2235 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2236 // after we've rematched networks with requests which should make a potential 2237 // fallback network the default or requested a new network from the 2238 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2239 // long time. 2240 try { 2241 mNetd.removeNetwork(nai.network.netId); 2242 } catch (Exception e) { 2243 loge("Exception removing network: " + e); 2244 } 2245 } 2246 synchronized (mNetworkForNetId) { 2247 mNetIdInUse.delete(nai.network.netId); 2248 } 2249 } else { 2250 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2251 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2252 } 2253 } 2254 2255 // If this method proves to be too slow then we can maintain a separate 2256 // pendingIntent => NetworkRequestInfo map. 2257 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2258 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2259 Intent intent = pendingIntent.getIntent(); 2260 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2261 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2262 if (existingPendingIntent != null && 2263 existingPendingIntent.getIntent().filterEquals(intent)) { 2264 return entry.getValue(); 2265 } 2266 } 2267 return null; 2268 } 2269 2270 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2271 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2272 2273 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2274 if (existingRequest != null) { // remove the existing request. 2275 if (DBG) log("Replacing " + existingRequest.request + " with " 2276 + nri.request + " because their intents matched."); 2277 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2278 } 2279 handleRegisterNetworkRequest(nri); 2280 } 2281 2282 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2283 mNetworkRequests.put(nri.request, nri); 2284 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2285 if (!nri.isRequest()) { 2286 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2287 if (nri.request.networkCapabilities.hasSignalStrength() && 2288 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2289 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2290 } 2291 } 2292 } 2293 rematchAllNetworksAndRequests(null, 0); 2294 if (nri.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2295 sendUpdatedScoreToFactories(nri.request, 0); 2296 } 2297 } 2298 2299 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2300 int callingUid) { 2301 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2302 if (nri != null) { 2303 handleReleaseNetworkRequest(nri.request, callingUid); 2304 } 2305 } 2306 2307 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2308 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2309 // would it have a chance of satisfying any NetworkRequests. 2310 private boolean unneeded(NetworkAgentInfo nai) { 2311 if (!nai.created || nai.isVPN() || nai.lingering) return false; 2312 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2313 // If this Network is already the highest scoring Network for a request, or if 2314 // there is hope for it to become one if it validated, then it is needed. 2315 if (nri.isRequest() && nai.satisfies(nri.request) && 2316 (nai.networkRequests.get(nri.request.requestId) != null || 2317 // Note that this catches two important cases: 2318 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2319 // is currently satisfying the request. This is desirable when 2320 // cellular ends up validating but WiFi does not. 2321 // 2. Unvalidated WiFi will not be reaped when validated cellular 2322 // is currently satisfying the request. This is desirable when 2323 // WiFi ends up validating and out scoring cellular. 2324 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2325 nai.getCurrentScoreAsValidated())) { 2326 return false; 2327 } 2328 } 2329 return true; 2330 } 2331 2332 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2333 NetworkRequestInfo nri = mNetworkRequests.get(request); 2334 if (nri != null) { 2335 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2336 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2337 return; 2338 } 2339 if (DBG) log("releasing NetworkRequest " + request); 2340 nri.unlinkDeathRecipient(); 2341 mNetworkRequests.remove(request); 2342 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2343 if (nri.isRequest()) { 2344 // Find all networks that are satisfying this request and remove the request 2345 // from their request lists. 2346 // TODO - it's my understanding that for a request there is only a single 2347 // network satisfying it, so this loop is wasteful 2348 boolean wasKept = false; 2349 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2350 if (nai.networkRequests.get(nri.request.requestId) != null) { 2351 nai.networkRequests.remove(nri.request.requestId); 2352 if (DBG) { 2353 log(" Removing from current network " + nai.name() + 2354 ", leaving " + nai.networkRequests.size() + 2355 " requests."); 2356 } 2357 if (unneeded(nai)) { 2358 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2359 teardownUnneededNetwork(nai); 2360 } else { 2361 // suspect there should only be one pass through here 2362 // but if any were kept do the check below 2363 wasKept |= true; 2364 } 2365 } 2366 } 2367 2368 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2369 if (nai != null) { 2370 mNetworkForRequestId.remove(nri.request.requestId); 2371 } 2372 // Maintain the illusion. When this request arrived, we might have pretended 2373 // that a network connected to serve it, even though the network was already 2374 // connected. Now that this request has gone away, we might have to pretend 2375 // that the network disconnected. LegacyTypeTracker will generate that 2376 // phantom disconnect for this type. 2377 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2378 boolean doRemove = true; 2379 if (wasKept) { 2380 // check if any of the remaining requests for this network are for the 2381 // same legacy type - if so, don't remove the nai 2382 for (int i = 0; i < nai.networkRequests.size(); i++) { 2383 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2384 if (otherRequest.legacyType == nri.request.legacyType && 2385 isRequest(otherRequest)) { 2386 if (DBG) log(" still have other legacy request - leaving"); 2387 doRemove = false; 2388 } 2389 } 2390 } 2391 2392 if (doRemove) { 2393 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2394 } 2395 } 2396 2397 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2398 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2399 nri.request); 2400 } 2401 } else { 2402 // listens don't have a singular affectedNetwork. Check all networks to see 2403 // if this listen request applies and remove it. 2404 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2405 nai.networkRequests.remove(nri.request.requestId); 2406 if (nri.request.networkCapabilities.hasSignalStrength() && 2407 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2408 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2409 } 2410 } 2411 } 2412 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2413 } 2414 } 2415 2416 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2417 enforceConnectivityInternalPermission(); 2418 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2419 accept ? 1 : 0, always ? 1: 0, network)); 2420 } 2421 2422 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2423 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2424 " accept=" + accept + " always=" + always); 2425 2426 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2427 if (nai == null) { 2428 // Nothing to do. 2429 return; 2430 } 2431 2432 if (nai.everValidated) { 2433 // The network validated while the dialog box was up. Take no action. 2434 return; 2435 } 2436 2437 if (!nai.networkMisc.explicitlySelected) { 2438 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2439 } 2440 2441 if (accept != nai.networkMisc.acceptUnvalidated) { 2442 int oldScore = nai.getCurrentScore(); 2443 nai.networkMisc.acceptUnvalidated = accept; 2444 rematchAllNetworksAndRequests(nai, oldScore); 2445 sendUpdatedScoreToFactories(nai); 2446 } 2447 2448 if (always) { 2449 nai.asyncChannel.sendMessage( 2450 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2451 } 2452 2453 if (!accept) { 2454 // Tell the NetworkAgent to not automatically reconnect to the network. 2455 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2456 // Teardown the nework. 2457 teardownUnneededNetwork(nai); 2458 } 2459 2460 } 2461 2462 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2463 if (DBG) log("scheduleUnvalidatedPrompt " + nai.network); 2464 mHandler.sendMessageDelayed( 2465 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2466 PROMPT_UNVALIDATED_DELAY_MS); 2467 } 2468 2469 private void handlePromptUnvalidated(Network network) { 2470 if (DBG) log("handlePromptUnvalidated " + network); 2471 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2472 2473 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2474 // we haven't already been told to switch to it regardless of whether it validated or not. 2475 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2476 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2477 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2478 return; 2479 } 2480 2481 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2482 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2483 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2484 intent.setClassName("com.android.settings", 2485 "com.android.settings.wifi.WifiNoInternetDialog"); 2486 2487 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2488 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2489 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2490 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2491 } 2492 2493 private class InternalHandler extends Handler { 2494 public InternalHandler(Looper looper) { 2495 super(looper); 2496 } 2497 2498 @Override 2499 public void handleMessage(Message msg) { 2500 switch (msg.what) { 2501 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2502 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2503 String causedBy = null; 2504 synchronized (ConnectivityService.this) { 2505 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2506 mNetTransitionWakeLock.isHeld()) { 2507 mNetTransitionWakeLock.release(); 2508 causedBy = mNetTransitionWakeLockCausedBy; 2509 } else { 2510 break; 2511 } 2512 } 2513 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2514 log("Failed to find a new network - expiring NetTransition Wakelock"); 2515 } else { 2516 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2517 " cleared because we found a replacement network"); 2518 } 2519 break; 2520 } 2521 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2522 handleDeprecatedGlobalHttpProxy(); 2523 break; 2524 } 2525 case EVENT_PROXY_HAS_CHANGED: { 2526 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2527 break; 2528 } 2529 case EVENT_REGISTER_NETWORK_FACTORY: { 2530 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2531 break; 2532 } 2533 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2534 handleUnregisterNetworkFactory((Messenger)msg.obj); 2535 break; 2536 } 2537 case EVENT_REGISTER_NETWORK_AGENT: { 2538 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2539 break; 2540 } 2541 case EVENT_REGISTER_NETWORK_REQUEST: 2542 case EVENT_REGISTER_NETWORK_LISTENER: { 2543 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2544 break; 2545 } 2546 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2547 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2548 handleRegisterNetworkRequestWithIntent(msg); 2549 break; 2550 } 2551 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2552 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2553 break; 2554 } 2555 case EVENT_RELEASE_NETWORK_REQUEST: { 2556 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2557 break; 2558 } 2559 case EVENT_SET_ACCEPT_UNVALIDATED: { 2560 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2561 break; 2562 } 2563 case EVENT_PROMPT_UNVALIDATED: { 2564 handlePromptUnvalidated((Network) msg.obj); 2565 break; 2566 } 2567 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2568 handleMobileDataAlwaysOn(); 2569 break; 2570 } 2571 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2572 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2573 mKeepaliveTracker.handleStartKeepalive(msg); 2574 break; 2575 } 2576 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2577 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2578 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2579 int slot = msg.arg1; 2580 int reason = msg.arg2; 2581 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2582 break; 2583 } 2584 case EVENT_SYSTEM_READY: { 2585 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2586 nai.networkMonitor.systemReady = true; 2587 } 2588 break; 2589 } 2590 } 2591 } 2592 } 2593 2594 // javadoc from interface 2595 public int tether(String iface) { 2596 ConnectivityManager.enforceTetherChangePermission(mContext); 2597 if (isTetheringSupported()) { 2598 return mTethering.tether(iface); 2599 } else { 2600 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2601 } 2602 } 2603 2604 // javadoc from interface 2605 public int untether(String iface) { 2606 ConnectivityManager.enforceTetherChangePermission(mContext); 2607 2608 if (isTetheringSupported()) { 2609 return mTethering.untether(iface); 2610 } else { 2611 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2612 } 2613 } 2614 2615 // javadoc from interface 2616 public int getLastTetherError(String iface) { 2617 enforceTetherAccessPermission(); 2618 2619 if (isTetheringSupported()) { 2620 return mTethering.getLastTetherError(iface); 2621 } else { 2622 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2623 } 2624 } 2625 2626 // TODO - proper iface API for selection by property, inspection, etc 2627 public String[] getTetherableUsbRegexs() { 2628 enforceTetherAccessPermission(); 2629 if (isTetheringSupported()) { 2630 return mTethering.getTetherableUsbRegexs(); 2631 } else { 2632 return new String[0]; 2633 } 2634 } 2635 2636 public String[] getTetherableWifiRegexs() { 2637 enforceTetherAccessPermission(); 2638 if (isTetheringSupported()) { 2639 return mTethering.getTetherableWifiRegexs(); 2640 } else { 2641 return new String[0]; 2642 } 2643 } 2644 2645 public String[] getTetherableBluetoothRegexs() { 2646 enforceTetherAccessPermission(); 2647 if (isTetheringSupported()) { 2648 return mTethering.getTetherableBluetoothRegexs(); 2649 } else { 2650 return new String[0]; 2651 } 2652 } 2653 2654 public int setUsbTethering(boolean enable) { 2655 ConnectivityManager.enforceTetherChangePermission(mContext); 2656 if (isTetheringSupported()) { 2657 return mTethering.setUsbTethering(enable); 2658 } else { 2659 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2660 } 2661 } 2662 2663 // TODO - move iface listing, queries, etc to new module 2664 // javadoc from interface 2665 public String[] getTetherableIfaces() { 2666 enforceTetherAccessPermission(); 2667 return mTethering.getTetherableIfaces(); 2668 } 2669 2670 public String[] getTetheredIfaces() { 2671 enforceTetherAccessPermission(); 2672 return mTethering.getTetheredIfaces(); 2673 } 2674 2675 public String[] getTetheringErroredIfaces() { 2676 enforceTetherAccessPermission(); 2677 return mTethering.getErroredIfaces(); 2678 } 2679 2680 public String[] getTetheredDhcpRanges() { 2681 enforceConnectivityInternalPermission(); 2682 return mTethering.getTetheredDhcpRanges(); 2683 } 2684 2685 // if ro.tether.denied = true we default to no tethering 2686 // gservices could set the secure setting to 1 though to enable it on a build where it 2687 // had previously been turned off. 2688 @Override 2689 public boolean isTetheringSupported() { 2690 enforceTetherAccessPermission(); 2691 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2692 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2693 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2694 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2695 return tetherEnabledInSettings && mUserManager.isAdminUser() && 2696 ((mTethering.getTetherableUsbRegexs().length != 0 || 2697 mTethering.getTetherableWifiRegexs().length != 0 || 2698 mTethering.getTetherableBluetoothRegexs().length != 0) && 2699 mTethering.getUpstreamIfaceTypes().length != 0); 2700 } 2701 2702 @Override 2703 public void startTethering(int type, ResultReceiver receiver, 2704 boolean showProvisioningUi) { 2705 ConnectivityManager.enforceTetherChangePermission(mContext); 2706 if (!isTetheringSupported()) { 2707 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 2708 return; 2709 } 2710 mTethering.startTethering(type, receiver, showProvisioningUi); 2711 } 2712 2713 @Override 2714 public void stopTethering(int type) { 2715 ConnectivityManager.enforceTetherChangePermission(mContext); 2716 mTethering.stopTethering(type); 2717 } 2718 2719 // Called when we lose the default network and have no replacement yet. 2720 // This will automatically be cleared after X seconds or a new default network 2721 // becomes CONNECTED, whichever happens first. The timer is started by the 2722 // first caller and not restarted by subsequent callers. 2723 private void requestNetworkTransitionWakelock(String forWhom) { 2724 int serialNum = 0; 2725 synchronized (this) { 2726 if (mNetTransitionWakeLock.isHeld()) return; 2727 serialNum = ++mNetTransitionWakeLockSerialNumber; 2728 mNetTransitionWakeLock.acquire(); 2729 mNetTransitionWakeLockCausedBy = forWhom; 2730 } 2731 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2732 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2733 mNetTransitionWakeLockTimeout); 2734 return; 2735 } 2736 2737 // 100 percent is full good, 0 is full bad. 2738 public void reportInetCondition(int networkType, int percentage) { 2739 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2740 if (nai == null) return; 2741 reportNetworkConnectivity(nai.network, percentage > 50); 2742 } 2743 2744 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2745 enforceAccessPermission(); 2746 enforceInternetPermission(); 2747 2748 NetworkAgentInfo nai; 2749 if (network == null) { 2750 nai = getDefaultNetwork(); 2751 } else { 2752 nai = getNetworkAgentInfoForNetwork(network); 2753 } 2754 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2755 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2756 return; 2757 } 2758 // Revalidate if the app report does not match our current validated state. 2759 if (hasConnectivity == nai.lastValidated) return; 2760 final int uid = Binder.getCallingUid(); 2761 if (DBG) { 2762 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2763 ") by " + uid); 2764 } 2765 synchronized (nai) { 2766 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2767 // which isn't meant to work on uncreated networks. 2768 if (!nai.created) return; 2769 2770 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2771 2772 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2773 } 2774 } 2775 2776 private ProxyInfo getDefaultProxy() { 2777 // this information is already available as a world read/writable jvm property 2778 // so this API change wouldn't have a benifit. It also breaks the passing 2779 // of proxy info to all the JVMs. 2780 // enforceAccessPermission(); 2781 synchronized (mProxyLock) { 2782 ProxyInfo ret = mGlobalProxy; 2783 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2784 return ret; 2785 } 2786 } 2787 2788 public ProxyInfo getProxyForNetwork(Network network) { 2789 if (network == null) return getDefaultProxy(); 2790 final ProxyInfo globalProxy = getGlobalProxy(); 2791 if (globalProxy != null) return globalProxy; 2792 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 2793 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 2794 // caller may not have. 2795 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2796 if (nai == null) return null; 2797 synchronized (nai) { 2798 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 2799 if (proxyInfo == null) return null; 2800 return new ProxyInfo(proxyInfo); 2801 } 2802 } 2803 2804 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2805 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2806 // proxy is null then there is no proxy in place). 2807 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2808 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2809 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2810 proxy = null; 2811 } 2812 return proxy; 2813 } 2814 2815 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2816 // better for determining if a new proxy broadcast is necessary: 2817 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2818 // avoid unnecessary broadcasts. 2819 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2820 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2821 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2822 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2823 // all set. 2824 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2825 a = canonicalizeProxyInfo(a); 2826 b = canonicalizeProxyInfo(b); 2827 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2828 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2829 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2830 } 2831 2832 public void setGlobalProxy(ProxyInfo proxyProperties) { 2833 enforceConnectivityInternalPermission(); 2834 2835 synchronized (mProxyLock) { 2836 if (proxyProperties == mGlobalProxy) return; 2837 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2838 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2839 2840 String host = ""; 2841 int port = 0; 2842 String exclList = ""; 2843 String pacFileUrl = ""; 2844 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2845 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2846 if (!proxyProperties.isValid()) { 2847 if (DBG) 2848 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2849 return; 2850 } 2851 mGlobalProxy = new ProxyInfo(proxyProperties); 2852 host = mGlobalProxy.getHost(); 2853 port = mGlobalProxy.getPort(); 2854 exclList = mGlobalProxy.getExclusionListAsString(); 2855 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2856 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2857 } 2858 } else { 2859 mGlobalProxy = null; 2860 } 2861 ContentResolver res = mContext.getContentResolver(); 2862 final long token = Binder.clearCallingIdentity(); 2863 try { 2864 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2865 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2866 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2867 exclList); 2868 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2869 } finally { 2870 Binder.restoreCallingIdentity(token); 2871 } 2872 2873 if (mGlobalProxy == null) { 2874 proxyProperties = mDefaultProxy; 2875 } 2876 sendProxyBroadcast(proxyProperties); 2877 } 2878 } 2879 2880 private void loadGlobalProxy() { 2881 ContentResolver res = mContext.getContentResolver(); 2882 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2883 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2884 String exclList = Settings.Global.getString(res, 2885 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2886 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2887 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2888 ProxyInfo proxyProperties; 2889 if (!TextUtils.isEmpty(pacFileUrl)) { 2890 proxyProperties = new ProxyInfo(pacFileUrl); 2891 } else { 2892 proxyProperties = new ProxyInfo(host, port, exclList); 2893 } 2894 if (!proxyProperties.isValid()) { 2895 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2896 return; 2897 } 2898 2899 synchronized (mProxyLock) { 2900 mGlobalProxy = proxyProperties; 2901 } 2902 } 2903 } 2904 2905 public ProxyInfo getGlobalProxy() { 2906 // this information is already available as a world read/writable jvm property 2907 // so this API change wouldn't have a benifit. It also breaks the passing 2908 // of proxy info to all the JVMs. 2909 // enforceAccessPermission(); 2910 synchronized (mProxyLock) { 2911 return mGlobalProxy; 2912 } 2913 } 2914 2915 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2916 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2917 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2918 proxy = null; 2919 } 2920 synchronized (mProxyLock) { 2921 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2922 if (mDefaultProxy == proxy) return; // catches repeated nulls 2923 if (proxy != null && !proxy.isValid()) { 2924 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2925 return; 2926 } 2927 2928 // This call could be coming from the PacManager, containing the port of the local 2929 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2930 // global (to get the correct local port), and send a broadcast. 2931 // TODO: Switch PacManager to have its own message to send back rather than 2932 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2933 if ((mGlobalProxy != null) && (proxy != null) 2934 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2935 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2936 mGlobalProxy = proxy; 2937 sendProxyBroadcast(mGlobalProxy); 2938 return; 2939 } 2940 mDefaultProxy = proxy; 2941 2942 if (mGlobalProxy != null) return; 2943 if (!mDefaultProxyDisabled) { 2944 sendProxyBroadcast(proxy); 2945 } 2946 } 2947 } 2948 2949 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2950 // This method gets called when any network changes proxy, but the broadcast only ever contains 2951 // the default proxy (even if it hasn't changed). 2952 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2953 // world where an app might be bound to a non-default network. 2954 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2955 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2956 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2957 2958 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2959 sendProxyBroadcast(getDefaultProxy()); 2960 } 2961 } 2962 2963 private void handleDeprecatedGlobalHttpProxy() { 2964 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2965 Settings.Global.HTTP_PROXY); 2966 if (!TextUtils.isEmpty(proxy)) { 2967 String data[] = proxy.split(":"); 2968 if (data.length == 0) { 2969 return; 2970 } 2971 2972 String proxyHost = data[0]; 2973 int proxyPort = 8080; 2974 if (data.length > 1) { 2975 try { 2976 proxyPort = Integer.parseInt(data[1]); 2977 } catch (NumberFormatException e) { 2978 return; 2979 } 2980 } 2981 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2982 setGlobalProxy(p); 2983 } 2984 } 2985 2986 private void sendProxyBroadcast(ProxyInfo proxy) { 2987 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2988 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2989 if (DBG) log("sending Proxy Broadcast for " + proxy); 2990 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2991 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2992 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2993 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2994 final long ident = Binder.clearCallingIdentity(); 2995 try { 2996 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2997 } finally { 2998 Binder.restoreCallingIdentity(ident); 2999 } 3000 } 3001 3002 private static class SettingsObserver extends ContentObserver { 3003 final private HashMap<Uri, Integer> mUriEventMap; 3004 final private Context mContext; 3005 final private Handler mHandler; 3006 3007 SettingsObserver(Context context, Handler handler) { 3008 super(null); 3009 mUriEventMap = new HashMap<Uri, Integer>(); 3010 mContext = context; 3011 mHandler = handler; 3012 } 3013 3014 void observe(Uri uri, int what) { 3015 mUriEventMap.put(uri, what); 3016 final ContentResolver resolver = mContext.getContentResolver(); 3017 resolver.registerContentObserver(uri, false, this); 3018 } 3019 3020 @Override 3021 public void onChange(boolean selfChange) { 3022 Slog.wtf(TAG, "Should never be reached."); 3023 } 3024 3025 @Override 3026 public void onChange(boolean selfChange, Uri uri) { 3027 final Integer what = mUriEventMap.get(uri); 3028 if (what != null) { 3029 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3030 } else { 3031 loge("No matching event to send for URI=" + uri); 3032 } 3033 } 3034 } 3035 3036 private static void log(String s) { 3037 Slog.d(TAG, s); 3038 } 3039 3040 private static void loge(String s) { 3041 Slog.e(TAG, s); 3042 } 3043 3044 private static <T> T checkNotNull(T value, String message) { 3045 if (value == null) { 3046 throw new NullPointerException(message); 3047 } 3048 return value; 3049 } 3050 3051 /** 3052 * Prepare for a VPN application. 3053 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3054 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3055 * 3056 * @param oldPackage Package name of the application which currently controls VPN, which will 3057 * be replaced. If there is no such application, this should should either be 3058 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3059 * @param newPackage Package name of the application which should gain control of VPN, or 3060 * {@code null} to disable. 3061 * @param userId User for whom to prepare the new VPN. 3062 * 3063 * @hide 3064 */ 3065 @Override 3066 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3067 int userId) { 3068 enforceCrossUserPermission(userId); 3069 throwIfLockdownEnabled(); 3070 3071 synchronized(mVpns) { 3072 Vpn vpn = mVpns.get(userId); 3073 if (vpn != null) { 3074 return vpn.prepare(oldPackage, newPackage); 3075 } else { 3076 return false; 3077 } 3078 } 3079 } 3080 3081 /** 3082 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3083 * This method is used by system-privileged apps. 3084 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3085 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3086 * 3087 * @param packageName The package for which authorization state should change. 3088 * @param userId User for whom {@code packageName} is installed. 3089 * @param authorized {@code true} if this app should be able to start a VPN connection without 3090 * explicit user approval, {@code false} if not. 3091 * 3092 * @hide 3093 */ 3094 @Override 3095 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3096 enforceCrossUserPermission(userId); 3097 3098 synchronized(mVpns) { 3099 Vpn vpn = mVpns.get(userId); 3100 if (vpn != null) { 3101 vpn.setPackageAuthorization(packageName, authorized); 3102 } 3103 } 3104 } 3105 3106 /** 3107 * Configure a TUN interface and return its file descriptor. Parameters 3108 * are encoded and opaque to this class. This method is used by VpnBuilder 3109 * and not available in ConnectivityManager. Permissions are checked in 3110 * Vpn class. 3111 * @hide 3112 */ 3113 @Override 3114 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3115 throwIfLockdownEnabled(); 3116 int user = UserHandle.getUserId(Binder.getCallingUid()); 3117 synchronized(mVpns) { 3118 return mVpns.get(user).establish(config); 3119 } 3120 } 3121 3122 /** 3123 * Start legacy VPN, controlling native daemons as needed. Creates a 3124 * secondary thread to perform connection work, returning quickly. 3125 */ 3126 @Override 3127 public void startLegacyVpn(VpnProfile profile) { 3128 throwIfLockdownEnabled(); 3129 final LinkProperties egress = getActiveLinkProperties(); 3130 if (egress == null) { 3131 throw new IllegalStateException("Missing active network connection"); 3132 } 3133 int user = UserHandle.getUserId(Binder.getCallingUid()); 3134 synchronized(mVpns) { 3135 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3136 } 3137 } 3138 3139 /** 3140 * Return the information of the ongoing legacy VPN. This method is used 3141 * by VpnSettings and not available in ConnectivityManager. Permissions 3142 * are checked in Vpn class. 3143 */ 3144 @Override 3145 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3146 enforceCrossUserPermission(userId); 3147 if (mLockdownEnabled) { 3148 return null; 3149 } 3150 3151 synchronized(mVpns) { 3152 return mVpns.get(userId).getLegacyVpnInfo(); 3153 } 3154 } 3155 3156 /** 3157 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3158 * and not available in ConnectivityManager. 3159 */ 3160 @Override 3161 public VpnInfo[] getAllVpnInfo() { 3162 enforceConnectivityInternalPermission(); 3163 if (mLockdownEnabled) { 3164 return new VpnInfo[0]; 3165 } 3166 3167 synchronized(mVpns) { 3168 List<VpnInfo> infoList = new ArrayList<>(); 3169 for (int i = 0; i < mVpns.size(); i++) { 3170 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3171 if (info != null) { 3172 infoList.add(info); 3173 } 3174 } 3175 return infoList.toArray(new VpnInfo[infoList.size()]); 3176 } 3177 } 3178 3179 /** 3180 * @return VPN information for accounting, or null if we can't retrieve all required 3181 * information, e.g primary underlying iface. 3182 */ 3183 @Nullable 3184 private VpnInfo createVpnInfo(Vpn vpn) { 3185 VpnInfo info = vpn.getVpnInfo(); 3186 if (info == null) { 3187 return null; 3188 } 3189 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3190 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3191 // the underlyingNetworks list. 3192 if (underlyingNetworks == null) { 3193 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3194 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3195 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3196 } 3197 } else if (underlyingNetworks.length > 0) { 3198 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3199 if (linkProperties != null) { 3200 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3201 } 3202 } 3203 return info.primaryUnderlyingIface == null ? null : info; 3204 } 3205 3206 /** 3207 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3208 * VpnDialogs and not available in ConnectivityManager. 3209 * Permissions are checked in Vpn class. 3210 * @hide 3211 */ 3212 @Override 3213 public VpnConfig getVpnConfig(int userId) { 3214 enforceCrossUserPermission(userId); 3215 synchronized(mVpns) { 3216 Vpn vpn = mVpns.get(userId); 3217 if (vpn != null) { 3218 return vpn.getVpnConfig(); 3219 } else { 3220 return null; 3221 } 3222 } 3223 } 3224 3225 @Override 3226 public boolean updateLockdownVpn() { 3227 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3228 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3229 return false; 3230 } 3231 3232 // Tear down existing lockdown if profile was removed 3233 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3234 if (mLockdownEnabled) { 3235 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3236 final VpnProfile profile = VpnProfile.decode( 3237 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3238 if (profile == null) { 3239 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3240 setLockdownTracker(null); 3241 return true; 3242 } 3243 int user = UserHandle.getUserId(Binder.getCallingUid()); 3244 synchronized(mVpns) { 3245 Vpn vpn = mVpns.get(user); 3246 if (vpn == null) { 3247 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3248 return false; 3249 } 3250 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3251 } 3252 } else { 3253 setLockdownTracker(null); 3254 } 3255 3256 return true; 3257 } 3258 3259 /** 3260 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3261 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3262 */ 3263 private void setLockdownTracker(LockdownVpnTracker tracker) { 3264 // Shutdown any existing tracker 3265 final LockdownVpnTracker existing = mLockdownTracker; 3266 mLockdownTracker = null; 3267 if (existing != null) { 3268 existing.shutdown(); 3269 } 3270 3271 try { 3272 if (tracker != null) { 3273 mNetd.setFirewallEnabled(true); 3274 mNetd.setFirewallInterfaceRule("lo", true); 3275 mLockdownTracker = tracker; 3276 mLockdownTracker.init(); 3277 } else { 3278 mNetd.setFirewallEnabled(false); 3279 } 3280 } catch (RemoteException e) { 3281 // ignored; NMS lives inside system_server 3282 } 3283 } 3284 3285 private void throwIfLockdownEnabled() { 3286 if (mLockdownEnabled) { 3287 throw new IllegalStateException("Unavailable in lockdown mode"); 3288 } 3289 } 3290 3291 /** 3292 * Sets up or tears down the always-on VPN for user {@param user} as appropriate. 3293 * 3294 * @return {@code false} in case of errors; {@code true} otherwise. 3295 */ 3296 private boolean updateAlwaysOnVpn(int user) { 3297 final String lockdownPackage = getAlwaysOnVpnPackage(user); 3298 if (lockdownPackage == null) { 3299 return true; 3300 } 3301 3302 // Create an intent to start the VPN service declared in the app's manifest. 3303 Intent serviceIntent = new Intent(VpnConfig.SERVICE_INTERFACE); 3304 serviceIntent.setPackage(lockdownPackage); 3305 3306 try { 3307 return mContext.startServiceAsUser(serviceIntent, UserHandle.of(user)) != null; 3308 } catch (RuntimeException e) { 3309 return false; 3310 } 3311 } 3312 3313 @Override 3314 public boolean setAlwaysOnVpnPackage(int userId, String packageName) { 3315 enforceConnectivityInternalPermission(); 3316 enforceCrossUserPermission(userId); 3317 3318 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3319 if (LockdownVpnTracker.isEnabled()) { 3320 return false; 3321 } 3322 3323 // If the current VPN package is the same as the new one, this is a no-op 3324 final String oldPackage = getAlwaysOnVpnPackage(userId); 3325 if (TextUtils.equals(oldPackage, packageName)) { 3326 return true; 3327 } 3328 3329 synchronized (mVpns) { 3330 Vpn vpn = mVpns.get(userId); 3331 if (vpn == null) { 3332 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3333 return false; 3334 } 3335 if (!vpn.setAlwaysOnPackage(packageName)) { 3336 return false; 3337 } 3338 if (!updateAlwaysOnVpn(userId)) { 3339 vpn.setAlwaysOnPackage(null); 3340 return false; 3341 } 3342 } 3343 return true; 3344 } 3345 3346 @Override 3347 public String getAlwaysOnVpnPackage(int userId) { 3348 enforceConnectivityInternalPermission(); 3349 enforceCrossUserPermission(userId); 3350 3351 synchronized (mVpns) { 3352 Vpn vpn = mVpns.get(userId); 3353 if (vpn == null) { 3354 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3355 return null; 3356 } 3357 return vpn.getAlwaysOnPackage(); 3358 } 3359 } 3360 3361 @Override 3362 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3363 // TODO: Remove? Any reason to trigger a provisioning check? 3364 return -1; 3365 } 3366 3367 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3368 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3369 3370 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3371 if (DBG) { 3372 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3373 + " action=" + action); 3374 } 3375 Intent intent = new Intent(action); 3376 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3377 // Concatenate the range of types onto the range of NetIDs. 3378 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3379 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3380 networkType, null, pendingIntent, false); 3381 } 3382 3383 /** 3384 * Show or hide network provisioning notifications. 3385 * 3386 * We use notifications for two purposes: to notify that a network requires sign in 3387 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3388 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3389 * particular network we can display the notification type that was most recently requested. 3390 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3391 * might first display NO_INTERNET, and then when the captive portal check completes, display 3392 * SIGN_IN. 3393 * 3394 * @param id an identifier that uniquely identifies this notification. This must match 3395 * between show and hide calls. We use the NetID value but for legacy callers 3396 * we concatenate the range of types with the range of NetIDs. 3397 */ 3398 private void setProvNotificationVisibleIntent(boolean visible, int id, 3399 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3400 boolean highPriority) { 3401 if (DBG) { 3402 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3403 + " networkType=" + getNetworkTypeName(networkType) 3404 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3405 } 3406 3407 Resources r = Resources.getSystem(); 3408 NotificationManager notificationManager = (NotificationManager) mContext 3409 .getSystemService(Context.NOTIFICATION_SERVICE); 3410 3411 if (visible) { 3412 CharSequence title; 3413 CharSequence details; 3414 int icon; 3415 if (notifyType == NotificationType.NO_INTERNET && 3416 networkType == ConnectivityManager.TYPE_WIFI) { 3417 title = r.getString(R.string.wifi_no_internet, 0); 3418 details = r.getString(R.string.wifi_no_internet_detailed); 3419 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3420 } else if (notifyType == NotificationType.SIGN_IN) { 3421 switch (networkType) { 3422 case ConnectivityManager.TYPE_WIFI: 3423 title = r.getString(R.string.wifi_available_sign_in, 0); 3424 details = r.getString(R.string.network_available_sign_in_detailed, 3425 extraInfo); 3426 icon = R.drawable.stat_notify_wifi_in_range; 3427 break; 3428 case ConnectivityManager.TYPE_MOBILE: 3429 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3430 title = r.getString(R.string.network_available_sign_in, 0); 3431 // TODO: Change this to pull from NetworkInfo once a printable 3432 // name has been added to it 3433 details = mTelephonyManager.getNetworkOperatorName(); 3434 icon = R.drawable.stat_notify_rssi_in_range; 3435 break; 3436 default: 3437 title = r.getString(R.string.network_available_sign_in, 0); 3438 details = r.getString(R.string.network_available_sign_in_detailed, 3439 extraInfo); 3440 icon = R.drawable.stat_notify_rssi_in_range; 3441 break; 3442 } 3443 } else { 3444 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3445 + getNetworkTypeName(networkType)); 3446 return; 3447 } 3448 3449 Notification notification = new Notification.Builder(mContext) 3450 .setWhen(0) 3451 .setSmallIcon(icon) 3452 .setAutoCancel(true) 3453 .setTicker(title) 3454 .setColor(mContext.getColor( 3455 com.android.internal.R.color.system_notification_accent_color)) 3456 .setContentTitle(title) 3457 .setContentText(details) 3458 .setContentIntent(intent) 3459 .setLocalOnly(true) 3460 .setPriority(highPriority ? 3461 Notification.PRIORITY_HIGH : 3462 Notification.PRIORITY_DEFAULT) 3463 .setDefaults(highPriority ? Notification.DEFAULT_ALL : 0) 3464 .setOnlyAlertOnce(true) 3465 .build(); 3466 3467 try { 3468 notificationManager.notify(NOTIFICATION_ID, id, notification); 3469 } catch (NullPointerException npe) { 3470 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3471 npe.printStackTrace(); 3472 } 3473 } else { 3474 try { 3475 notificationManager.cancel(NOTIFICATION_ID, id); 3476 } catch (NullPointerException npe) { 3477 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3478 npe.printStackTrace(); 3479 } 3480 } 3481 } 3482 3483 /** Location to an updatable file listing carrier provisioning urls. 3484 * An example: 3485 * 3486 * <?xml version="1.0" encoding="utf-8"?> 3487 * <provisioningUrls> 3488 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3489 * </provisioningUrls> 3490 */ 3491 private static final String PROVISIONING_URL_PATH = 3492 "/data/misc/radio/provisioning_urls.xml"; 3493 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3494 3495 /** XML tag for root element. */ 3496 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3497 /** XML tag for individual url */ 3498 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3499 /** XML attribute for mcc */ 3500 private static final String ATTR_MCC = "mcc"; 3501 /** XML attribute for mnc */ 3502 private static final String ATTR_MNC = "mnc"; 3503 3504 private String getProvisioningUrlBaseFromFile() { 3505 FileReader fileReader = null; 3506 XmlPullParser parser = null; 3507 Configuration config = mContext.getResources().getConfiguration(); 3508 3509 try { 3510 fileReader = new FileReader(mProvisioningUrlFile); 3511 parser = Xml.newPullParser(); 3512 parser.setInput(fileReader); 3513 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3514 3515 while (true) { 3516 XmlUtils.nextElement(parser); 3517 3518 String element = parser.getName(); 3519 if (element == null) break; 3520 3521 if (element.equals(TAG_PROVISIONING_URL)) { 3522 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3523 try { 3524 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3525 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3526 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3527 parser.next(); 3528 if (parser.getEventType() == XmlPullParser.TEXT) { 3529 return parser.getText(); 3530 } 3531 } 3532 } 3533 } catch (NumberFormatException e) { 3534 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3535 } 3536 } 3537 } 3538 return null; 3539 } catch (FileNotFoundException e) { 3540 loge("Carrier Provisioning Urls file not found"); 3541 } catch (XmlPullParserException e) { 3542 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3543 } catch (IOException e) { 3544 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3545 } finally { 3546 if (fileReader != null) { 3547 try { 3548 fileReader.close(); 3549 } catch (IOException e) {} 3550 } 3551 } 3552 return null; 3553 } 3554 3555 @Override 3556 public String getMobileProvisioningUrl() { 3557 enforceConnectivityInternalPermission(); 3558 String url = getProvisioningUrlBaseFromFile(); 3559 if (TextUtils.isEmpty(url)) { 3560 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3561 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3562 } else { 3563 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3564 } 3565 // populate the iccid, imei and phone number in the provisioning url. 3566 if (!TextUtils.isEmpty(url)) { 3567 String phoneNumber = mTelephonyManager.getLine1Number(); 3568 if (TextUtils.isEmpty(phoneNumber)) { 3569 phoneNumber = "0000000000"; 3570 } 3571 url = String.format(url, 3572 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3573 mTelephonyManager.getDeviceId() /* IMEI */, 3574 phoneNumber /* Phone numer */); 3575 } 3576 3577 return url; 3578 } 3579 3580 @Override 3581 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3582 String action) { 3583 enforceConnectivityInternalPermission(); 3584 final long ident = Binder.clearCallingIdentity(); 3585 try { 3586 setProvNotificationVisible(visible, networkType, action); 3587 } finally { 3588 Binder.restoreCallingIdentity(ident); 3589 } 3590 } 3591 3592 @Override 3593 public void setAirplaneMode(boolean enable) { 3594 enforceConnectivityInternalPermission(); 3595 final long ident = Binder.clearCallingIdentity(); 3596 try { 3597 final ContentResolver cr = mContext.getContentResolver(); 3598 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3599 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3600 intent.putExtra("state", enable); 3601 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3602 } finally { 3603 Binder.restoreCallingIdentity(ident); 3604 } 3605 } 3606 3607 private void onUserStart(int userId) { 3608 synchronized(mVpns) { 3609 Vpn userVpn = mVpns.get(userId); 3610 if (userVpn != null) { 3611 loge("Starting user already has a VPN"); 3612 return; 3613 } 3614 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3615 mVpns.put(userId, userVpn); 3616 } 3617 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3618 updateLockdownVpn(); 3619 } else { 3620 updateAlwaysOnVpn(userId); 3621 } 3622 } 3623 3624 private void onUserStop(int userId) { 3625 synchronized(mVpns) { 3626 Vpn userVpn = mVpns.get(userId); 3627 if (userVpn == null) { 3628 loge("Stopping user has no VPN"); 3629 return; 3630 } 3631 mVpns.delete(userId); 3632 } 3633 } 3634 3635 private void onUserAdded(int userId) { 3636 synchronized(mVpns) { 3637 final int vpnsSize = mVpns.size(); 3638 for (int i = 0; i < vpnsSize; i++) { 3639 Vpn vpn = mVpns.valueAt(i); 3640 vpn.onUserAdded(userId); 3641 } 3642 } 3643 } 3644 3645 private void onUserRemoved(int userId) { 3646 synchronized(mVpns) { 3647 final int vpnsSize = mVpns.size(); 3648 for (int i = 0; i < vpnsSize; i++) { 3649 Vpn vpn = mVpns.valueAt(i); 3650 vpn.onUserRemoved(userId); 3651 } 3652 } 3653 } 3654 3655 private void onUserUnlocked(int userId) { 3656 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3657 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3658 updateLockdownVpn(); 3659 } else { 3660 updateAlwaysOnVpn(userId); 3661 } 3662 } 3663 3664 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3665 @Override 3666 public void onReceive(Context context, Intent intent) { 3667 final String action = intent.getAction(); 3668 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3669 if (userId == UserHandle.USER_NULL) return; 3670 3671 if (Intent.ACTION_USER_STARTING.equals(action)) { 3672 onUserStart(userId); 3673 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3674 onUserStop(userId); 3675 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3676 onUserAdded(userId); 3677 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3678 onUserRemoved(userId); 3679 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3680 onUserUnlocked(userId); 3681 } 3682 } 3683 }; 3684 3685 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3686 new HashMap<Messenger, NetworkFactoryInfo>(); 3687 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3688 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3689 3690 private static class NetworkFactoryInfo { 3691 public final String name; 3692 public final Messenger messenger; 3693 public final AsyncChannel asyncChannel; 3694 3695 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3696 this.name = name; 3697 this.messenger = messenger; 3698 this.asyncChannel = asyncChannel; 3699 } 3700 } 3701 3702 /** 3703 * A NetworkRequest as registered by an application can be one of three 3704 * types: 3705 * 3706 * - "listen", for which the framework will issue callbacks about any 3707 * and all networks that match the specified NetworkCapabilities, 3708 * 3709 * - "request", capable of causing a specific network to be created 3710 * first (e.g. a telephony DUN request), the framework will issue 3711 * callbacks about the single, highest scoring current network 3712 * (if any) that matches the specified NetworkCapabilities, or 3713 * 3714 * - "track the default network", a hybrid of the two designed such 3715 * that the framework will issue callbacks for the single, highest 3716 * scoring current network (if any) that matches the capabilities of 3717 * the default Internet request (mDefaultRequest), but which cannot 3718 * cause the framework to either create or retain the existence of 3719 * any specific network. 3720 * 3721 */ 3722 private static enum NetworkRequestType { 3723 LISTEN, 3724 TRACK_DEFAULT, 3725 REQUEST 3726 }; 3727 3728 /** 3729 * Tracks info about the requester. 3730 * Also used to notice when the calling process dies so we can self-expire 3731 */ 3732 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3733 final NetworkRequest request; 3734 final PendingIntent mPendingIntent; 3735 boolean mPendingIntentSent; 3736 private final IBinder mBinder; 3737 final int mPid; 3738 final int mUid; 3739 final Messenger messenger; 3740 private final NetworkRequestType mType; 3741 3742 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, NetworkRequestType type) { 3743 request = r; 3744 mPendingIntent = pi; 3745 messenger = null; 3746 mBinder = null; 3747 mPid = getCallingPid(); 3748 mUid = getCallingUid(); 3749 mType = type; 3750 } 3751 3752 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, NetworkRequestType type) { 3753 super(); 3754 messenger = m; 3755 request = r; 3756 mBinder = binder; 3757 mPid = getCallingPid(); 3758 mUid = getCallingUid(); 3759 mType = type; 3760 mPendingIntent = null; 3761 3762 try { 3763 mBinder.linkToDeath(this, 0); 3764 } catch (RemoteException e) { 3765 binderDied(); 3766 } 3767 } 3768 3769 private String typeString() { 3770 switch (mType) { 3771 case LISTEN: return "Listen"; 3772 case REQUEST: return "Request"; 3773 case TRACK_DEFAULT: return "Track default"; 3774 default: 3775 return "unknown type"; 3776 } 3777 } 3778 3779 void unlinkDeathRecipient() { 3780 if (mBinder != null) { 3781 mBinder.unlinkToDeath(this, 0); 3782 } 3783 } 3784 3785 public void binderDied() { 3786 log("ConnectivityService NetworkRequestInfo binderDied(" + 3787 request + ", " + mBinder + ")"); 3788 releaseNetworkRequest(request); 3789 } 3790 3791 /** 3792 * Returns true iff. the contained NetworkRequest is one that: 3793 * 3794 * - should be associated with at most one satisfying network 3795 * at a time; 3796 * 3797 * - should cause a network to be kept up if it is the only network 3798 * which can satisfy the NetworkReqeust. 3799 * 3800 * For full detail of how isRequest() is used for pairing Networks with 3801 * NetworkRequests read rematchNetworkAndRequests(). 3802 * 3803 * TODO: Rename to something more properly descriptive. 3804 */ 3805 public boolean isRequest() { 3806 return (mType == NetworkRequestType.TRACK_DEFAULT) || 3807 (mType == NetworkRequestType.REQUEST); 3808 } 3809 3810 public String toString() { 3811 return typeString() + 3812 " from uid/pid:" + mUid + "/" + mPid + 3813 " for " + request + 3814 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3815 } 3816 } 3817 3818 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3819 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3820 if (badCapability != null) { 3821 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3822 } 3823 } 3824 3825 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3826 final SortedSet<Integer> thresholds = new TreeSet(); 3827 synchronized (nai) { 3828 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3829 if (nri.request.networkCapabilities.hasSignalStrength() && 3830 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3831 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3832 } 3833 } 3834 } 3835 return new ArrayList<Integer>(thresholds); 3836 } 3837 3838 private void updateSignalStrengthThresholds( 3839 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3840 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3841 Bundle thresholds = new Bundle(); 3842 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3843 3844 // TODO: Switch to VDBG. 3845 if (DBG) { 3846 String detail; 3847 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3848 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3849 } else { 3850 detail = reason; 3851 } 3852 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3853 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3854 } 3855 3856 nai.asyncChannel.sendMessage( 3857 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3858 0, 0, thresholds); 3859 } 3860 3861 @Override 3862 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3863 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3864 final NetworkRequestType type = (networkCapabilities == null) 3865 ? NetworkRequestType.TRACK_DEFAULT 3866 : NetworkRequestType.REQUEST; 3867 // If the requested networkCapabilities is null, take them instead from 3868 // the default network request. This allows callers to keep track of 3869 // the system default network. 3870 if (type == NetworkRequestType.TRACK_DEFAULT) { 3871 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 3872 enforceAccessPermission(); 3873 } else { 3874 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3875 enforceNetworkRequestPermissions(networkCapabilities); 3876 } 3877 enforceMeteredApnPolicy(networkCapabilities); 3878 ensureRequestableCapabilities(networkCapabilities); 3879 3880 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3881 throw new IllegalArgumentException("Bad timeout specified"); 3882 } 3883 3884 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 3885 .equals(networkCapabilities.getNetworkSpecifier())) { 3886 throw new IllegalArgumentException("Invalid network specifier - must not be '" 3887 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 3888 } 3889 3890 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3891 nextNetworkRequestId()); 3892 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, type); 3893 if (DBG) log("requestNetwork for " + nri); 3894 3895 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3896 if (timeoutMs > 0) { 3897 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3898 nri), timeoutMs); 3899 } 3900 return networkRequest; 3901 } 3902 3903 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3904 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 3905 enforceConnectivityInternalPermission(); 3906 } else { 3907 enforceChangePermission(); 3908 } 3909 } 3910 3911 @Override 3912 public boolean requestBandwidthUpdate(Network network) { 3913 enforceAccessPermission(); 3914 NetworkAgentInfo nai = null; 3915 if (network == null) { 3916 return false; 3917 } 3918 synchronized (mNetworkForNetId) { 3919 nai = mNetworkForNetId.get(network.netId); 3920 } 3921 if (nai != null) { 3922 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3923 return true; 3924 } 3925 return false; 3926 } 3927 3928 3929 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3930 // if UID is restricted, don't allow them to bring up metered APNs 3931 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 3932 final int uidRules; 3933 final int uid = Binder.getCallingUid(); 3934 synchronized(mRulesLock) { 3935 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3936 } 3937 if (uidRules != RULE_ALLOW_ALL) { 3938 // we could silently fail or we can filter the available nets to only give 3939 // them those they have access to. Chose the more useful 3940 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 3941 } 3942 } 3943 } 3944 3945 @Override 3946 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3947 PendingIntent operation) { 3948 checkNotNull(operation, "PendingIntent cannot be null."); 3949 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3950 enforceNetworkRequestPermissions(networkCapabilities); 3951 enforceMeteredApnPolicy(networkCapabilities); 3952 ensureRequestableCapabilities(networkCapabilities); 3953 3954 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3955 nextNetworkRequestId()); 3956 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3957 NetworkRequestType.REQUEST); 3958 if (DBG) log("pendingRequest for " + nri); 3959 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3960 nri)); 3961 return networkRequest; 3962 } 3963 3964 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3965 mHandler.sendMessageDelayed( 3966 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3967 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3968 } 3969 3970 @Override 3971 public void releasePendingNetworkRequest(PendingIntent operation) { 3972 checkNotNull(operation, "PendingIntent cannot be null."); 3973 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3974 getCallingUid(), 0, operation)); 3975 } 3976 3977 // In order to implement the compatibility measure for pre-M apps that call 3978 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 3979 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 3980 // This ensures it has permission to do so. 3981 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 3982 if (nc == null) { 3983 return false; 3984 } 3985 int[] transportTypes = nc.getTransportTypes(); 3986 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 3987 return false; 3988 } 3989 try { 3990 mContext.enforceCallingOrSelfPermission( 3991 android.Manifest.permission.ACCESS_WIFI_STATE, 3992 "ConnectivityService"); 3993 } catch (SecurityException e) { 3994 return false; 3995 } 3996 return true; 3997 } 3998 3999 @Override 4000 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4001 Messenger messenger, IBinder binder) { 4002 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4003 enforceAccessPermission(); 4004 } 4005 4006 NetworkRequest networkRequest = new NetworkRequest( 4007 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 4008 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 4009 NetworkRequestType.LISTEN); 4010 if (DBG) log("listenForNetwork for " + nri); 4011 4012 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4013 return networkRequest; 4014 } 4015 4016 @Override 4017 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4018 PendingIntent operation) { 4019 checkNotNull(operation, "PendingIntent cannot be null."); 4020 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4021 enforceAccessPermission(); 4022 } 4023 4024 NetworkRequest networkRequest = new NetworkRequest( 4025 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 4026 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 4027 NetworkRequestType.LISTEN); 4028 if (DBG) log("pendingListenForNetwork for " + nri); 4029 4030 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4031 } 4032 4033 @Override 4034 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4035 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 4036 0, networkRequest)); 4037 } 4038 4039 @Override 4040 public void registerNetworkFactory(Messenger messenger, String name) { 4041 enforceConnectivityInternalPermission(); 4042 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4043 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4044 } 4045 4046 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4047 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4048 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4049 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4050 } 4051 4052 @Override 4053 public void unregisterNetworkFactory(Messenger messenger) { 4054 enforceConnectivityInternalPermission(); 4055 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4056 } 4057 4058 private void handleUnregisterNetworkFactory(Messenger messenger) { 4059 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4060 if (nfi == null) { 4061 loge("Failed to find Messenger in unregisterNetworkFactory"); 4062 return; 4063 } 4064 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4065 } 4066 4067 /** 4068 * NetworkAgentInfo supporting a request by requestId. 4069 * These have already been vetted (their Capabilities satisfy the request) 4070 * and the are the highest scored network available. 4071 * the are keyed off the Requests requestId. 4072 */ 4073 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4074 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4075 new SparseArray<NetworkAgentInfo>(); 4076 4077 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4078 @GuardedBy("mNetworkForNetId") 4079 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4080 new SparseArray<NetworkAgentInfo>(); 4081 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4082 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4083 // there may not be a strict 1:1 correlation between the two. 4084 @GuardedBy("mNetworkForNetId") 4085 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4086 4087 // NetworkAgentInfo keyed off its connecting messenger 4088 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4089 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4090 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4091 new HashMap<Messenger, NetworkAgentInfo>(); 4092 4093 @GuardedBy("mBlockedAppUids") 4094 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4095 4096 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4097 private final NetworkRequest mDefaultRequest; 4098 4099 // Request used to optionally keep mobile data active even when higher 4100 // priority networks like Wi-Fi are active. 4101 private final NetworkRequest mDefaultMobileDataRequest; 4102 4103 private NetworkAgentInfo getDefaultNetwork() { 4104 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4105 } 4106 4107 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4108 return nai == getDefaultNetwork(); 4109 } 4110 4111 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4112 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4113 int currentScore, NetworkMisc networkMisc) { 4114 enforceConnectivityInternalPermission(); 4115 4116 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4117 // satisfies mDefaultRequest. 4118 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4119 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4120 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4121 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4122 synchronized (this) { 4123 nai.networkMonitor.systemReady = mSystemReady; 4124 } 4125 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network); 4126 if (DBG) log("registerNetworkAgent " + nai); 4127 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4128 return nai.network.netId; 4129 } 4130 4131 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4132 if (VDBG) log("Got NetworkAgent Messenger"); 4133 mNetworkAgentInfos.put(na.messenger, na); 4134 synchronized (mNetworkForNetId) { 4135 mNetworkForNetId.put(na.network.netId, na); 4136 } 4137 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4138 NetworkInfo networkInfo = na.networkInfo; 4139 na.networkInfo = null; 4140 updateNetworkInfo(na, networkInfo); 4141 } 4142 4143 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4144 LinkProperties newLp = networkAgent.linkProperties; 4145 int netId = networkAgent.network.netId; 4146 4147 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4148 // we do anything else, make sure its LinkProperties are accurate. 4149 if (networkAgent.clatd != null) { 4150 networkAgent.clatd.fixupLinkProperties(oldLp); 4151 } 4152 4153 updateInterfaces(newLp, oldLp, netId); 4154 updateMtu(newLp, oldLp); 4155 // TODO - figure out what to do for clat 4156// for (LinkProperties lp : newLp.getStackedLinks()) { 4157// updateMtu(lp, null); 4158// } 4159 updateTcpBufferSizes(networkAgent); 4160 4161 // TODO: deprecate and remove mDefaultDns when we can do so safely. See http://b/18327075 4162 // In L, we used it only when the network had Internet access but provided no DNS servers. 4163 // For now, just disable it, and if disabling it doesn't break things, remove it. 4164 // final boolean useDefaultDns = networkAgent.networkCapabilities.hasCapability( 4165 // NET_CAPABILITY_INTERNET); 4166 final boolean useDefaultDns = false; 4167 final boolean flushDns = updateRoutes(newLp, oldLp, netId); 4168 updateDnses(newLp, oldLp, netId, flushDns, useDefaultDns); 4169 4170 updateClat(newLp, oldLp, networkAgent); 4171 if (isDefaultNetwork(networkAgent)) { 4172 handleApplyDefaultProxy(newLp.getHttpProxy()); 4173 } else { 4174 updateProxy(newLp, oldLp, networkAgent); 4175 } 4176 // TODO - move this check to cover the whole function 4177 if (!Objects.equals(newLp, oldLp)) { 4178 notifyIfacesChangedForNetworkStats(); 4179 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4180 } 4181 4182 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4183 } 4184 4185 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4186 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4187 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4188 4189 if (!wasRunningClat && shouldRunClat) { 4190 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4191 nai.clatd.start(); 4192 } else if (wasRunningClat && !shouldRunClat) { 4193 nai.clatd.stop(); 4194 } 4195 } 4196 4197 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4198 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4199 if (oldLp != null) { 4200 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4201 } else if (newLp != null) { 4202 interfaceDiff.added = newLp.getAllInterfaceNames(); 4203 } 4204 for (String iface : interfaceDiff.added) { 4205 try { 4206 if (DBG) log("Adding iface " + iface + " to network " + netId); 4207 mNetd.addInterfaceToNetwork(iface, netId); 4208 } catch (Exception e) { 4209 loge("Exception adding interface: " + e); 4210 } 4211 } 4212 for (String iface : interfaceDiff.removed) { 4213 try { 4214 if (DBG) log("Removing iface " + iface + " from network " + netId); 4215 mNetd.removeInterfaceFromNetwork(iface, netId); 4216 } catch (Exception e) { 4217 loge("Exception removing interface: " + e); 4218 } 4219 } 4220 } 4221 4222 /** 4223 * Have netd update routes from oldLp to newLp. 4224 * @return true if routes changed between oldLp and newLp 4225 */ 4226 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4227 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4228 if (oldLp != null) { 4229 routeDiff = oldLp.compareAllRoutes(newLp); 4230 } else if (newLp != null) { 4231 routeDiff.added = newLp.getAllRoutes(); 4232 } 4233 4234 // add routes before removing old in case it helps with continuous connectivity 4235 4236 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4237 for (RouteInfo route : routeDiff.added) { 4238 if (route.hasGateway()) continue; 4239 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4240 try { 4241 mNetd.addRoute(netId, route); 4242 } catch (Exception e) { 4243 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4244 loge("Exception in addRoute for non-gateway: " + e); 4245 } 4246 } 4247 } 4248 for (RouteInfo route : routeDiff.added) { 4249 if (route.hasGateway() == false) continue; 4250 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4251 try { 4252 mNetd.addRoute(netId, route); 4253 } catch (Exception e) { 4254 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4255 loge("Exception in addRoute for gateway: " + e); 4256 } 4257 } 4258 } 4259 4260 for (RouteInfo route : routeDiff.removed) { 4261 if (DBG) log("Removing Route [" + route + "] from network " + netId); 4262 try { 4263 mNetd.removeRoute(netId, route); 4264 } catch (Exception e) { 4265 loge("Exception in removeRoute: " + e); 4266 } 4267 } 4268 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4269 } 4270 4271 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId, 4272 boolean flush, boolean useDefaultDns) { 4273 if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) { 4274 Collection<InetAddress> dnses = newLp.getDnsServers(); 4275 if (dnses.size() == 0 && mDefaultDns != null && useDefaultDns) { 4276 dnses = new ArrayList(); 4277 dnses.add(mDefaultDns); 4278 if (DBG) { 4279 loge("no dns provided for netId " + netId + ", so using defaults"); 4280 } 4281 } 4282 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 4283 try { 4284 mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses), 4285 newLp.getDomains()); 4286 } catch (Exception e) { 4287 loge("Exception in setDnsServersForNetwork: " + e); 4288 } 4289 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4290 if (defaultNai != null && defaultNai.network.netId == netId) { 4291 setDefaultDnsSystemProperties(dnses); 4292 } 4293 flushVmDnsCache(); 4294 } else if (flush) { 4295 try { 4296 mNetd.flushNetworkDnsCache(netId); 4297 } catch (Exception e) { 4298 loge("Exception in flushNetworkDnsCache: " + e); 4299 } 4300 flushVmDnsCache(); 4301 } 4302 } 4303 4304 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4305 int last = 0; 4306 for (InetAddress dns : dnses) { 4307 ++last; 4308 String key = "net.dns" + last; 4309 String value = dns.getHostAddress(); 4310 SystemProperties.set(key, value); 4311 } 4312 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4313 String key = "net.dns" + i; 4314 SystemProperties.set(key, ""); 4315 } 4316 mNumDnsEntries = last; 4317 } 4318 4319 /** 4320 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4321 * augmented with any stateful capabilities implied from {@code networkAgent} 4322 * (e.g., validated status and captive portal status). 4323 * 4324 * @param nai the network having its capabilities updated. 4325 * @param networkCapabilities the new network capabilities. 4326 */ 4327 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4328 // Don't modify caller's NetworkCapabilities. 4329 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4330 if (nai.lastValidated) { 4331 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4332 } else { 4333 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4334 } 4335 if (nai.lastCaptivePortalDetected) { 4336 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4337 } else { 4338 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4339 } 4340 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4341 final int oldScore = nai.getCurrentScore(); 4342 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4343 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4344 try { 4345 mNetd.setNetworkPermission(nai.network.netId, 4346 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4347 null : NetworkManagementService.PERMISSION_SYSTEM); 4348 } catch (RemoteException e) { 4349 loge("Exception in setNetworkPermission: " + e); 4350 } 4351 } 4352 synchronized (nai) { 4353 nai.networkCapabilities = networkCapabilities; 4354 } 4355 rematchAllNetworksAndRequests(nai, oldScore); 4356 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4357 } 4358 } 4359 4360 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4361 for (int i = 0; i < nai.networkRequests.size(); i++) { 4362 NetworkRequest nr = nai.networkRequests.valueAt(i); 4363 // Don't send listening requests to factories. b/17393458 4364 if (!isRequest(nr)) continue; 4365 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4366 } 4367 } 4368 4369 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4370 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4371 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4372 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4373 networkRequest); 4374 } 4375 } 4376 4377 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4378 int notificationType) { 4379 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4380 Intent intent = new Intent(); 4381 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4382 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4383 nri.mPendingIntentSent = true; 4384 sendIntent(nri.mPendingIntent, intent); 4385 } 4386 // else not handled 4387 } 4388 4389 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4390 mPendingIntentWakeLock.acquire(); 4391 try { 4392 if (DBG) log("Sending " + pendingIntent); 4393 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4394 } catch (PendingIntent.CanceledException e) { 4395 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4396 mPendingIntentWakeLock.release(); 4397 releasePendingNetworkRequest(pendingIntent); 4398 } 4399 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4400 } 4401 4402 @Override 4403 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4404 String resultData, Bundle resultExtras) { 4405 if (DBG) log("Finished sending " + pendingIntent); 4406 mPendingIntentWakeLock.release(); 4407 // Release with a delay so the receiving client has an opportunity to put in its 4408 // own request. 4409 releasePendingNetworkRequestWithDelay(pendingIntent); 4410 } 4411 4412 private void callCallbackForRequest(NetworkRequestInfo nri, 4413 NetworkAgentInfo networkAgent, int notificationType) { 4414 if (nri.messenger == null) return; // Default request has no msgr 4415 Bundle bundle = new Bundle(); 4416 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4417 new NetworkRequest(nri.request)); 4418 Message msg = Message.obtain(); 4419 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4420 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4421 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4422 } 4423 switch (notificationType) { 4424 case ConnectivityManager.CALLBACK_LOSING: { 4425 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4426 break; 4427 } 4428 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4429 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4430 new NetworkCapabilities(networkAgent.networkCapabilities)); 4431 break; 4432 } 4433 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4434 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4435 new LinkProperties(networkAgent.linkProperties)); 4436 break; 4437 } 4438 } 4439 msg.what = notificationType; 4440 msg.setData(bundle); 4441 try { 4442 if (VDBG) { 4443 log("sending notification " + notifyTypeToName(notificationType) + 4444 " for " + nri.request); 4445 } 4446 nri.messenger.send(msg); 4447 } catch (RemoteException e) { 4448 // may occur naturally in the race of binder death. 4449 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4450 } 4451 } 4452 4453 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4454 for (int i = 0; i < nai.networkRequests.size(); i++) { 4455 NetworkRequest nr = nai.networkRequests.valueAt(i); 4456 // Ignore listening requests. 4457 if (!isRequest(nr)) continue; 4458 loge("Dead network still had at least " + nr); 4459 break; 4460 } 4461 nai.asyncChannel.disconnect(); 4462 } 4463 4464 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4465 if (oldNetwork == null) { 4466 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4467 return; 4468 } 4469 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4470 teardownUnneededNetwork(oldNetwork); 4471 } 4472 4473 private void makeDefault(NetworkAgentInfo newNetwork) { 4474 if (DBG) log("Switching to new default network: " + newNetwork); 4475 ConnectivityServiceChangeEvent.logEvent(newNetwork.network.netId); 4476 setupDataActivityTracking(newNetwork); 4477 try { 4478 mNetd.setDefaultNetId(newNetwork.network.netId); 4479 } catch (Exception e) { 4480 loge("Exception setting default network :" + e); 4481 } 4482 notifyLockdownVpn(newNetwork); 4483 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4484 updateTcpBufferSizes(newNetwork); 4485 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4486 } 4487 4488 // Handles a network appearing or improving its score. 4489 // 4490 // - Evaluates all current NetworkRequests that can be 4491 // satisfied by newNetwork, and reassigns to newNetwork 4492 // any such requests for which newNetwork is the best. 4493 // 4494 // - Lingers any validated Networks that as a result are no longer 4495 // needed. A network is needed if it is the best network for 4496 // one or more NetworkRequests, or if it is a VPN. 4497 // 4498 // - Tears down newNetwork if it just became validated 4499 // but turns out to be unneeded. 4500 // 4501 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4502 // networks that have no chance (i.e. even if validated) 4503 // of becoming the highest scoring network. 4504 // 4505 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4506 // it does not remove NetworkRequests that other Networks could better satisfy. 4507 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4508 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4509 // as it performs better by a factor of the number of Networks. 4510 // 4511 // @param newNetwork is the network to be matched against NetworkRequests. 4512 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4513 // performed to tear down unvalidated networks that have no chance (i.e. even if 4514 // validated) of becoming the highest scoring network. 4515 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4516 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4517 if (!newNetwork.created) return; 4518 boolean keep = newNetwork.isVPN(); 4519 boolean isNewDefault = false; 4520 NetworkAgentInfo oldDefaultNetwork = null; 4521 if (VDBG) log("rematching " + newNetwork.name()); 4522 // Find and migrate to this Network any NetworkRequests for 4523 // which this network is now the best. 4524 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4525 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4526 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4527 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4528 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4529 final boolean satisfies = newNetwork.satisfies(nri.request); 4530 if (newNetwork == currentNetwork && satisfies) { 4531 if (VDBG) { 4532 log("Network " + newNetwork.name() + " was already satisfying" + 4533 " request " + nri.request.requestId + ". No change."); 4534 } 4535 keep = true; 4536 continue; 4537 } 4538 4539 // check if it satisfies the NetworkCapabilities 4540 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4541 if (satisfies) { 4542 if (!nri.isRequest()) { 4543 // This is not a request, it's a callback listener. 4544 // Add it to newNetwork regardless of score. 4545 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4546 continue; 4547 } 4548 4549 // next check if it's better than any current network we're using for 4550 // this request 4551 if (VDBG) { 4552 log("currentScore = " + 4553 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4554 ", newScore = " + newNetwork.getCurrentScore()); 4555 } 4556 if (currentNetwork == null || 4557 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4558 if (DBG) log("rematch for " + newNetwork.name()); 4559 if (currentNetwork != null) { 4560 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4561 currentNetwork.networkRequests.remove(nri.request.requestId); 4562 currentNetwork.networkLingered.add(nri.request); 4563 affectedNetworks.add(currentNetwork); 4564 } else { 4565 if (DBG) log(" accepting network in place of null"); 4566 } 4567 unlinger(newNetwork); 4568 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4569 if (!newNetwork.addRequest(nri.request)) { 4570 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4571 } 4572 addedRequests.add(nri); 4573 keep = true; 4574 // Tell NetworkFactories about the new score, so they can stop 4575 // trying to connect if they know they cannot match it. 4576 // TODO - this could get expensive if we have alot of requests for this 4577 // network. Think about if there is a way to reduce this. Push 4578 // netid->request mapping to each factory? 4579 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4580 if (mDefaultRequest.requestId == nri.request.requestId) { 4581 isNewDefault = true; 4582 oldDefaultNetwork = currentNetwork; 4583 } 4584 } 4585 } else if (newNetwork.networkRequests.get(nri.request.requestId) != null) { 4586 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4587 // mark it as no longer satisfying "nri". Because networks are processed by 4588 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4589 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4590 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4591 // This means this code doesn't have to handle the case where "currentNetwork" no 4592 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4593 if (DBG) { 4594 log("Network " + newNetwork.name() + " stopped satisfying" + 4595 " request " + nri.request.requestId); 4596 } 4597 newNetwork.networkRequests.remove(nri.request.requestId); 4598 if (currentNetwork == newNetwork) { 4599 mNetworkForRequestId.remove(nri.request.requestId); 4600 sendUpdatedScoreToFactories(nri.request, 0); 4601 } else { 4602 if (nri.isRequest()) { 4603 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4604 newNetwork.name() + 4605 " without updating mNetworkForRequestId or factories!"); 4606 } 4607 } 4608 // TODO: technically, sending CALLBACK_LOST here is 4609 // incorrect if nri is a request (not a listen) and there 4610 // is a replacement network currently connected that can 4611 // satisfy it. However, the only capability that can both 4612 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4613 // so this code is only incorrect for a network that loses 4614 // the TRUSTED capability, which is a rare case. 4615 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST); 4616 } 4617 } 4618 // Linger any networks that are no longer needed. 4619 for (NetworkAgentInfo nai : affectedNetworks) { 4620 if (nai.lingering) { 4621 // Already lingered. Nothing to do. This can only happen if "nai" is in 4622 // "affectedNetworks" twice. The reasoning being that to get added to 4623 // "affectedNetworks", "nai" must have been satisfying a NetworkRequest 4624 // (i.e. not lingered) so it could have only been lingered by this loop. 4625 // unneeded(nai) will be false and we'll call unlinger() below which would 4626 // be bad, so handle it here. 4627 } else if (unneeded(nai)) { 4628 linger(nai); 4629 } else { 4630 // Clear nai.networkLingered we might have added above. 4631 unlinger(nai); 4632 } 4633 } 4634 if (isNewDefault) { 4635 // Notify system services that this network is up. 4636 makeDefault(newNetwork); 4637 synchronized (ConnectivityService.this) { 4638 // have a new default network, release the transition wakelock in 4639 // a second if it's held. The second pause is to allow apps 4640 // to reconnect over the new network 4641 if (mNetTransitionWakeLock.isHeld()) { 4642 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4643 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4644 mNetTransitionWakeLockSerialNumber, 0), 4645 1000); 4646 } 4647 } 4648 } 4649 4650 // do this after the default net is switched, but 4651 // before LegacyTypeTracker sends legacy broadcasts 4652 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4653 4654 if (isNewDefault) { 4655 // Maintain the illusion: since the legacy API only 4656 // understands one network at a time, we must pretend 4657 // that the current default network disconnected before 4658 // the new one connected. 4659 if (oldDefaultNetwork != null) { 4660 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4661 oldDefaultNetwork, true); 4662 } 4663 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4664 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4665 notifyLockdownVpn(newNetwork); 4666 } 4667 4668 if (keep) { 4669 // Notify battery stats service about this network, both the normal 4670 // interface and any stacked links. 4671 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4672 try { 4673 final IBatteryStats bs = BatteryStatsService.getService(); 4674 final int type = newNetwork.networkInfo.getType(); 4675 4676 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4677 bs.noteNetworkInterfaceType(baseIface, type); 4678 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4679 final String stackedIface = stacked.getInterfaceName(); 4680 bs.noteNetworkInterfaceType(stackedIface, type); 4681 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4682 } 4683 } catch (RemoteException ignored) { 4684 } 4685 4686 // This has to happen after the notifyNetworkCallbacks as that tickles each 4687 // ConnectivityManager instance so that legacy requests correctly bind dns 4688 // requests to this network. The legacy users are listening for this bcast 4689 // and will generally do a dns request so they can ensureRouteToHost and if 4690 // they do that before the callbacks happen they'll use the default network. 4691 // 4692 // TODO: Is there still a race here? We send the broadcast 4693 // after sending the callback, but if the app can receive the 4694 // broadcast before the callback, it might still break. 4695 // 4696 // This *does* introduce a race where if the user uses the new api 4697 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4698 // they may get old info. Reverse this after the old startUsing api is removed. 4699 // This is on top of the multiple intent sequencing referenced in the todo above. 4700 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4701 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4702 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4703 // legacy type tracker filters out repeat adds 4704 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4705 } 4706 } 4707 4708 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4709 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4710 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4711 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4712 if (newNetwork.isVPN()) { 4713 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4714 } 4715 } 4716 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4717 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4718 if (unneeded(nai)) { 4719 if (DBG) log("Reaping " + nai.name()); 4720 teardownUnneededNetwork(nai); 4721 } 4722 } 4723 } 4724 } 4725 4726 /** 4727 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4728 * being disconnected. 4729 * @param changed If only one Network's score or capabilities have been modified since the last 4730 * time this function was called, pass this Network in this argument, otherwise pass 4731 * null. 4732 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4733 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4734 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4735 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4736 * network's score. 4737 */ 4738 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4739 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4740 // to avoid the slowness. It is not simply enough to process just "changed", for 4741 // example in the case where "changed"'s score decreases and another network should begin 4742 // satifying a NetworkRequest that "changed" currently satisfies. 4743 4744 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4745 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4746 // rematchNetworkAndRequests() handles. 4747 if (changed != null && oldScore < changed.getCurrentScore()) { 4748 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP); 4749 } else { 4750 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4751 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4752 // Rematch higher scoring networks first to prevent requests first matching a lower 4753 // scoring network and then a higher scoring network, which could produce multiple 4754 // callbacks and inadvertently unlinger networks. 4755 Arrays.sort(nais); 4756 for (NetworkAgentInfo nai : nais) { 4757 rematchNetworkAndRequests(nai, 4758 // Only reap the last time through the loop. Reaping before all rematching 4759 // is complete could incorrectly teardown a network that hasn't yet been 4760 // rematched. 4761 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4762 : ReapUnvalidatedNetworks.REAP); 4763 } 4764 } 4765 } 4766 4767 private void updateInetCondition(NetworkAgentInfo nai) { 4768 // Don't bother updating until we've graduated to validated at least once. 4769 if (!nai.everValidated) return; 4770 // For now only update icons for default connection. 4771 // TODO: Update WiFi and cellular icons separately. b/17237507 4772 if (!isDefaultNetwork(nai)) return; 4773 4774 int newInetCondition = nai.lastValidated ? 100 : 0; 4775 // Don't repeat publish. 4776 if (newInetCondition == mDefaultInetConditionPublished) return; 4777 4778 mDefaultInetConditionPublished = newInetCondition; 4779 sendInetConditionBroadcast(nai.networkInfo); 4780 } 4781 4782 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4783 if (mLockdownTracker != null) { 4784 if (nai != null && nai.isVPN()) { 4785 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4786 } else { 4787 mLockdownTracker.onNetworkInfoChanged(); 4788 } 4789 } 4790 } 4791 4792 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4793 NetworkInfo.State state = newInfo.getState(); 4794 NetworkInfo oldInfo = null; 4795 final int oldScore = networkAgent.getCurrentScore(); 4796 synchronized (networkAgent) { 4797 oldInfo = networkAgent.networkInfo; 4798 networkAgent.networkInfo = newInfo; 4799 } 4800 notifyLockdownVpn(networkAgent); 4801 4802 if (oldInfo != null && oldInfo.getState() == state) { 4803 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 4804 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 4805 notifyIfacesChangedForNetworkStats(); 4806 } else if (VDBG) log("ignoring duplicate network state non-change"); 4807 // In either case, no further work should be needed. 4808 return; 4809 } 4810 if (DBG) { 4811 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4812 (oldInfo == null ? "null" : oldInfo.getState()) + 4813 " to " + state); 4814 } 4815 4816 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4817 try { 4818 // This should never fail. Specifying an already in use NetID will cause failure. 4819 if (networkAgent.isVPN()) { 4820 mNetd.createVirtualNetwork(networkAgent.network.netId, 4821 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4822 (networkAgent.networkMisc == null || 4823 !networkAgent.networkMisc.allowBypass)); 4824 } else { 4825 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4826 networkAgent.networkCapabilities.hasCapability( 4827 NET_CAPABILITY_NOT_RESTRICTED) ? 4828 null : NetworkManagementService.PERMISSION_SYSTEM); 4829 } 4830 } catch (Exception e) { 4831 loge("Error creating network " + networkAgent.network.netId + ": " 4832 + e.getMessage()); 4833 return; 4834 } 4835 networkAgent.created = true; 4836 updateLinkProperties(networkAgent, null); 4837 notifyIfacesChangedForNetworkStats(); 4838 4839 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4840 scheduleUnvalidatedPrompt(networkAgent); 4841 4842 if (networkAgent.isVPN()) { 4843 // Temporarily disable the default proxy (not global). 4844 synchronized (mProxyLock) { 4845 if (!mDefaultProxyDisabled) { 4846 mDefaultProxyDisabled = true; 4847 if (mGlobalProxy == null && mDefaultProxy != null) { 4848 sendProxyBroadcast(null); 4849 } 4850 } 4851 } 4852 // TODO: support proxy per network. 4853 } 4854 4855 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 4856 // be communicated to a particular NetworkAgent depends only on the network's immutable, 4857 // capabilities, so it only needs to be done once on initial connect, not every time the 4858 // network's capabilities change. Note that we do this before rematching the network, 4859 // so we could decide to tear it down immediately afterwards. That's fine though - on 4860 // disconnection NetworkAgents should stop any signal strength monitoring they have been 4861 // doing. 4862 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 4863 4864 // Consider network even though it is not yet validated. 4865 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP); 4866 4867 // This has to happen after matching the requests, because callbacks are just requests. 4868 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4869 } else if (state == NetworkInfo.State.DISCONNECTED) { 4870 networkAgent.asyncChannel.disconnect(); 4871 if (networkAgent.isVPN()) { 4872 synchronized (mProxyLock) { 4873 if (mDefaultProxyDisabled) { 4874 mDefaultProxyDisabled = false; 4875 if (mGlobalProxy == null && mDefaultProxy != null) { 4876 sendProxyBroadcast(mDefaultProxy); 4877 } 4878 } 4879 } 4880 } 4881 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 4882 state == NetworkInfo.State.SUSPENDED) { 4883 // going into or coming out of SUSPEND: rescore and notify 4884 if (networkAgent.getCurrentScore() != oldScore) { 4885 rematchAllNetworksAndRequests(networkAgent, oldScore); 4886 } 4887 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 4888 ConnectivityManager.CALLBACK_SUSPENDED : 4889 ConnectivityManager.CALLBACK_RESUMED)); 4890 mLegacyTypeTracker.update(networkAgent); 4891 } 4892 } 4893 4894 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4895 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4896 if (score < 0) { 4897 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4898 "). Bumping score to min of 0"); 4899 score = 0; 4900 } 4901 4902 final int oldScore = nai.getCurrentScore(); 4903 nai.setCurrentScore(score); 4904 4905 rematchAllNetworksAndRequests(nai, oldScore); 4906 4907 sendUpdatedScoreToFactories(nai); 4908 } 4909 4910 // notify only this one new request of the current state 4911 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4912 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4913 // TODO - read state from monitor to decide what to send. 4914// if (nai.networkMonitor.isLingering()) { 4915// notifyType = NetworkCallbacks.LOSING; 4916// } else if (nai.networkMonitor.isEvaluating()) { 4917// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4918// } 4919 if (nri.mPendingIntent == null) { 4920 callCallbackForRequest(nri, nai, notifyType); 4921 } else { 4922 sendPendingIntentForRequest(nri, nai, notifyType); 4923 } 4924 } 4925 4926 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 4927 // The NetworkInfo we actually send out has no bearing on the real 4928 // state of affairs. For example, if the default connection is mobile, 4929 // and a request for HIPRI has just gone away, we need to pretend that 4930 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4931 // the state to DISCONNECTED, even though the network is of type MOBILE 4932 // and is still connected. 4933 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4934 info.setType(type); 4935 if (state != DetailedState.DISCONNECTED) { 4936 info.setDetailedState(state, null, info.getExtraInfo()); 4937 sendConnectedBroadcast(info); 4938 } else { 4939 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 4940 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4941 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4942 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4943 if (info.isFailover()) { 4944 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4945 nai.networkInfo.setFailover(false); 4946 } 4947 if (info.getReason() != null) { 4948 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4949 } 4950 if (info.getExtraInfo() != null) { 4951 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4952 } 4953 NetworkAgentInfo newDefaultAgent = null; 4954 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4955 newDefaultAgent = getDefaultNetwork(); 4956 if (newDefaultAgent != null) { 4957 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4958 newDefaultAgent.networkInfo); 4959 } else { 4960 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4961 } 4962 } 4963 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4964 mDefaultInetConditionPublished); 4965 sendStickyBroadcast(intent); 4966 if (newDefaultAgent != null) { 4967 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4968 } 4969 } 4970 } 4971 4972 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4973 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4974 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4975 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4976 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4977 if (VDBG) log(" sending notification for " + nr); 4978 if (nri.mPendingIntent == null) { 4979 callCallbackForRequest(nri, networkAgent, notifyType); 4980 } else { 4981 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4982 } 4983 } 4984 } 4985 4986 private String notifyTypeToName(int notifyType) { 4987 switch (notifyType) { 4988 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4989 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4990 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4991 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4992 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4993 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4994 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4995 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4996 } 4997 return "UNKNOWN"; 4998 } 4999 5000 /** 5001 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5002 * properties tracked by NetworkStatsService on an active iface has changed. 5003 */ 5004 private void notifyIfacesChangedForNetworkStats() { 5005 try { 5006 mStatsService.forceUpdateIfaces(); 5007 } catch (Exception ignored) { 5008 } 5009 } 5010 5011 @Override 5012 public boolean addVpnAddress(String address, int prefixLength) { 5013 throwIfLockdownEnabled(); 5014 int user = UserHandle.getUserId(Binder.getCallingUid()); 5015 synchronized (mVpns) { 5016 return mVpns.get(user).addAddress(address, prefixLength); 5017 } 5018 } 5019 5020 @Override 5021 public boolean removeVpnAddress(String address, int prefixLength) { 5022 throwIfLockdownEnabled(); 5023 int user = UserHandle.getUserId(Binder.getCallingUid()); 5024 synchronized (mVpns) { 5025 return mVpns.get(user).removeAddress(address, prefixLength); 5026 } 5027 } 5028 5029 @Override 5030 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5031 throwIfLockdownEnabled(); 5032 int user = UserHandle.getUserId(Binder.getCallingUid()); 5033 boolean success; 5034 synchronized (mVpns) { 5035 success = mVpns.get(user).setUnderlyingNetworks(networks); 5036 } 5037 if (success) { 5038 notifyIfacesChangedForNetworkStats(); 5039 } 5040 return success; 5041 } 5042 5043 @Override 5044 public String getCaptivePortalServerUrl() { 5045 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5046 } 5047 5048 @Override 5049 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5050 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5051 enforceKeepalivePermission(); 5052 mKeepaliveTracker.startNattKeepalive( 5053 getNetworkAgentInfoForNetwork(network), 5054 intervalSeconds, messenger, binder, 5055 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5056 } 5057 5058 @Override 5059 public void stopKeepalive(Network network, int slot) { 5060 mHandler.sendMessage(mHandler.obtainMessage( 5061 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5062 } 5063 5064 @Override 5065 public void factoryReset() { 5066 enforceConnectivityInternalPermission(); 5067 5068 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5069 return; 5070 } 5071 5072 final int userId = UserHandle.getCallingUserId(); 5073 5074 // Turn airplane mode off 5075 setAirplaneMode(false); 5076 5077 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5078 // Untether 5079 for (String tether : getTetheredIfaces()) { 5080 untether(tether); 5081 } 5082 } 5083 5084 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5085 // Turn VPN off 5086 VpnConfig vpnConfig = getVpnConfig(userId); 5087 if (vpnConfig != null) { 5088 if (vpnConfig.legacy) { 5089 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5090 } else { 5091 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5092 // in the future without user intervention. 5093 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5094 5095 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN, userId); 5096 } 5097 } 5098 } 5099 } 5100 5101 @VisibleForTesting 5102 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5103 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5104 return new NetworkMonitor(context, handler, nai, defaultRequest); 5105 } 5106} 5107