ConnectivityService.java revision f21b4dc1d6e9cc3fc164828e9eba33445c0801d0
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 final int uid = Binder.getCallingUid(); 1010 final int user = UserHandle.getUserId(uid); 1011 int vpnNetId = NETID_UNSET; 1012 synchronized (mVpns) { 1013 final Vpn vpn = mVpns.get(user); 1014 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1015 } 1016 NetworkAgentInfo nai; 1017 if (vpnNetId != NETID_UNSET) { 1018 synchronized (mNetworkForNetId) { 1019 nai = mNetworkForNetId.get(vpnNetId); 1020 } 1021 if (nai != null) return nai.network; 1022 } 1023 nai = getDefaultNetwork(); 1024 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 1025 return nai != null ? nai.network : null; 1026 } 1027 1028 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1029 enforceAccessPermission(); 1030 final int uid = Binder.getCallingUid(); 1031 NetworkState state = getUnfilteredActiveNetworkState(uid); 1032 return state.networkInfo; 1033 } 1034 1035 @Override 1036 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 1037 enforceConnectivityInternalPermission(); 1038 NetworkState state = getUnfilteredActiveNetworkState(uid); 1039 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1040 } 1041 1042 @Override 1043 public NetworkInfo getNetworkInfo(int networkType) { 1044 enforceAccessPermission(); 1045 final int uid = Binder.getCallingUid(); 1046 if (getVpnUnderlyingNetworks(uid) != null) { 1047 // A VPN is active, so we may need to return one of its underlying networks. This 1048 // information is not available in LegacyTypeTracker, so we have to get it from 1049 // getUnfilteredActiveNetworkState. 1050 NetworkState state = getUnfilteredActiveNetworkState(uid); 1051 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1052 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1053 } 1054 } 1055 NetworkState state = getFilteredNetworkState(networkType, uid); 1056 return state.networkInfo; 1057 } 1058 1059 @Override 1060 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1061 enforceAccessPermission(); 1062 final int uid = Binder.getCallingUid(); 1063 NetworkInfo info = null; 1064 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1065 if (nai != null) { 1066 synchronized (nai) { 1067 info = new NetworkInfo(nai.networkInfo); 1068 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1069 } 1070 } 1071 return info; 1072 } 1073 1074 @Override 1075 public NetworkInfo[] getAllNetworkInfo() { 1076 enforceAccessPermission(); 1077 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1078 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1079 networkType++) { 1080 NetworkInfo info = getNetworkInfo(networkType); 1081 if (info != null) { 1082 result.add(info); 1083 } 1084 } 1085 return result.toArray(new NetworkInfo[result.size()]); 1086 } 1087 1088 @Override 1089 public Network getNetworkForType(int networkType) { 1090 enforceAccessPermission(); 1091 final int uid = Binder.getCallingUid(); 1092 NetworkState state = getFilteredNetworkState(networkType, uid); 1093 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1094 return state.network; 1095 } 1096 return null; 1097 } 1098 1099 @Override 1100 public Network[] getAllNetworks() { 1101 enforceAccessPermission(); 1102 synchronized (mNetworkForNetId) { 1103 final Network[] result = new Network[mNetworkForNetId.size()]; 1104 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1105 result[i] = mNetworkForNetId.valueAt(i).network; 1106 } 1107 return result; 1108 } 1109 } 1110 1111 @Override 1112 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1113 // The basic principle is: if an app's traffic could possibly go over a 1114 // network, without the app doing anything multinetwork-specific, 1115 // (hence, by "default"), then include that network's capabilities in 1116 // the array. 1117 // 1118 // In the normal case, app traffic only goes over the system's default 1119 // network connection, so that's the only network returned. 1120 // 1121 // With a VPN in force, some app traffic may go into the VPN, and thus 1122 // over whatever underlying networks the VPN specifies, while other app 1123 // traffic may go over the system default network (e.g.: a split-tunnel 1124 // VPN, or an app disallowed by the VPN), so the set of networks 1125 // returned includes the VPN's underlying networks and the system 1126 // default. 1127 enforceAccessPermission(); 1128 1129 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1130 1131 NetworkAgentInfo nai = getDefaultNetwork(); 1132 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1133 if (nc != null) { 1134 result.put(nai.network, nc); 1135 } 1136 1137 if (!mLockdownEnabled) { 1138 synchronized (mVpns) { 1139 Vpn vpn = mVpns.get(userId); 1140 if (vpn != null) { 1141 Network[] networks = vpn.getUnderlyingNetworks(); 1142 if (networks != null) { 1143 for (Network network : networks) { 1144 nai = getNetworkAgentInfoForNetwork(network); 1145 nc = getNetworkCapabilitiesInternal(nai); 1146 if (nc != null) { 1147 result.put(network, nc); 1148 } 1149 } 1150 } 1151 } 1152 } 1153 } 1154 1155 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1156 out = result.values().toArray(out); 1157 return out; 1158 } 1159 1160 @Override 1161 public boolean isNetworkSupported(int networkType) { 1162 enforceAccessPermission(); 1163 return mLegacyTypeTracker.isTypeSupported(networkType); 1164 } 1165 1166 /** 1167 * Return LinkProperties for the active (i.e., connected) default 1168 * network interface. It is assumed that at most one default network 1169 * is active at a time. If more than one is active, it is indeterminate 1170 * which will be returned. 1171 * @return the ip properties for the active network, or {@code null} if 1172 * none is active 1173 */ 1174 @Override 1175 public LinkProperties getActiveLinkProperties() { 1176 enforceAccessPermission(); 1177 final int uid = Binder.getCallingUid(); 1178 NetworkState state = getUnfilteredActiveNetworkState(uid); 1179 return state.linkProperties; 1180 } 1181 1182 @Override 1183 public LinkProperties getLinkPropertiesForType(int networkType) { 1184 enforceAccessPermission(); 1185 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1186 if (nai != null) { 1187 synchronized (nai) { 1188 return new LinkProperties(nai.linkProperties); 1189 } 1190 } 1191 return null; 1192 } 1193 1194 // TODO - this should be ALL networks 1195 @Override 1196 public LinkProperties getLinkProperties(Network network) { 1197 enforceAccessPermission(); 1198 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1199 if (nai != null) { 1200 synchronized (nai) { 1201 return new LinkProperties(nai.linkProperties); 1202 } 1203 } 1204 return null; 1205 } 1206 1207 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1208 if (nai != null) { 1209 synchronized (nai) { 1210 if (nai.networkCapabilities != null) { 1211 return new NetworkCapabilities(nai.networkCapabilities); 1212 } 1213 } 1214 } 1215 return null; 1216 } 1217 1218 @Override 1219 public NetworkCapabilities getNetworkCapabilities(Network network) { 1220 enforceAccessPermission(); 1221 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1222 } 1223 1224 @Override 1225 public NetworkState[] getAllNetworkState() { 1226 // Require internal since we're handing out IMSI details 1227 enforceConnectivityInternalPermission(); 1228 1229 final ArrayList<NetworkState> result = Lists.newArrayList(); 1230 for (Network network : getAllNetworks()) { 1231 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1232 if (nai != null) { 1233 synchronized (nai) { 1234 final String subscriberId = (nai.networkMisc != null) 1235 ? nai.networkMisc.subscriberId : null; 1236 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1237 nai.networkCapabilities, network, subscriberId, null)); 1238 } 1239 } 1240 } 1241 return result.toArray(new NetworkState[result.size()]); 1242 } 1243 1244 @Override 1245 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1246 enforceAccessPermission(); 1247 final int uid = Binder.getCallingUid(); 1248 final long token = Binder.clearCallingIdentity(); 1249 try { 1250 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1251 if (state.networkInfo != null) { 1252 try { 1253 return mPolicyManager.getNetworkQuotaInfo(state); 1254 } catch (RemoteException e) { 1255 } 1256 } 1257 return null; 1258 } finally { 1259 Binder.restoreCallingIdentity(token); 1260 } 1261 } 1262 1263 @Override 1264 public boolean isActiveNetworkMetered() { 1265 enforceAccessPermission(); 1266 final int uid = Binder.getCallingUid(); 1267 final long token = Binder.clearCallingIdentity(); 1268 try { 1269 return isActiveNetworkMeteredUnchecked(uid); 1270 } finally { 1271 Binder.restoreCallingIdentity(token); 1272 } 1273 } 1274 1275 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1276 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1277 if (state.networkInfo != null) { 1278 try { 1279 return mPolicyManager.isNetworkMetered(state); 1280 } catch (RemoteException e) { 1281 } 1282 } 1283 return false; 1284 } 1285 1286 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1287 @Override 1288 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1289 int deviceType = Integer.parseInt(label); 1290 sendDataActivityBroadcast(deviceType, active, tsNanos); 1291 } 1292 }; 1293 1294 /** 1295 * Ensure that a network route exists to deliver traffic to the specified 1296 * host via the specified network interface. 1297 * @param networkType the type of the network over which traffic to the 1298 * specified host is to be routed 1299 * @param hostAddress the IP address of the host to which the route is 1300 * desired 1301 * @return {@code true} on success, {@code false} on failure 1302 */ 1303 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1304 enforceChangePermission(); 1305 if (mProtectedNetworks.contains(networkType)) { 1306 enforceConnectivityInternalPermission(); 1307 } 1308 1309 InetAddress addr; 1310 try { 1311 addr = InetAddress.getByAddress(hostAddress); 1312 } catch (UnknownHostException e) { 1313 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1314 return false; 1315 } 1316 1317 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1318 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1319 return false; 1320 } 1321 1322 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1323 if (nai == null) { 1324 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1325 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1326 } else { 1327 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1328 } 1329 return false; 1330 } 1331 1332 DetailedState netState; 1333 synchronized (nai) { 1334 netState = nai.networkInfo.getDetailedState(); 1335 } 1336 1337 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1338 if (VDBG) { 1339 log("requestRouteToHostAddress on down network " 1340 + "(" + networkType + ") - dropped" 1341 + " netState=" + netState); 1342 } 1343 return false; 1344 } 1345 1346 final int uid = Binder.getCallingUid(); 1347 final long token = Binder.clearCallingIdentity(); 1348 try { 1349 LinkProperties lp; 1350 int netId; 1351 synchronized (nai) { 1352 lp = nai.linkProperties; 1353 netId = nai.network.netId; 1354 } 1355 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1356 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1357 return ok; 1358 } finally { 1359 Binder.restoreCallingIdentity(token); 1360 } 1361 } 1362 1363 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1364 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1365 if (bestRoute == null) { 1366 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1367 } else { 1368 String iface = bestRoute.getInterface(); 1369 if (bestRoute.getGateway().equals(addr)) { 1370 // if there is no better route, add the implied hostroute for our gateway 1371 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1372 } else { 1373 // if we will connect to this through another route, add a direct route 1374 // to it's gateway 1375 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1376 } 1377 } 1378 if (DBG) log("Adding legacy route " + bestRoute + 1379 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1380 try { 1381 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1382 } catch (Exception e) { 1383 // never crash - catch them all 1384 if (DBG) loge("Exception trying to add a route: " + e); 1385 return false; 1386 } 1387 return true; 1388 } 1389 1390 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1391 @Override 1392 public void onUidRulesChanged(int uid, int uidRules) { 1393 // caller is NPMS, since we only register with them 1394 if (LOGD_RULES) { 1395 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1396 } 1397 1398 synchronized (mRulesLock) { 1399 // skip update when we've already applied rules 1400 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1401 if (oldRules == uidRules) return; 1402 1403 mUidRules.put(uid, uidRules); 1404 } 1405 1406 // TODO: notify UID when it has requested targeted updates 1407 } 1408 1409 @Override 1410 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1411 // caller is NPMS, since we only register with them 1412 if (LOGD_RULES) { 1413 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1414 } 1415 1416 synchronized (mRulesLock) { 1417 mMeteredIfaces.clear(); 1418 for (String iface : meteredIfaces) { 1419 mMeteredIfaces.add(iface); 1420 } 1421 } 1422 } 1423 1424 @Override 1425 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1426 // caller is NPMS, since we only register with them 1427 if (LOGD_RULES) { 1428 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1429 } 1430 } 1431 }; 1432 1433 /** 1434 * Require that the caller is either in the same user or has appropriate permission to interact 1435 * across users. 1436 * 1437 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1438 */ 1439 private void enforceCrossUserPermission(int userId) { 1440 if (userId == UserHandle.getCallingUserId()) { 1441 // Not a cross-user call. 1442 return; 1443 } 1444 mContext.enforceCallingOrSelfPermission( 1445 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1446 "ConnectivityService"); 1447 } 1448 1449 private void enforceInternetPermission() { 1450 mContext.enforceCallingOrSelfPermission( 1451 android.Manifest.permission.INTERNET, 1452 "ConnectivityService"); 1453 } 1454 1455 private void enforceAccessPermission() { 1456 mContext.enforceCallingOrSelfPermission( 1457 android.Manifest.permission.ACCESS_NETWORK_STATE, 1458 "ConnectivityService"); 1459 } 1460 1461 private void enforceChangePermission() { 1462 ConnectivityManager.enforceChangePermission(mContext); 1463 } 1464 1465 private void enforceTetherAccessPermission() { 1466 mContext.enforceCallingOrSelfPermission( 1467 android.Manifest.permission.ACCESS_NETWORK_STATE, 1468 "ConnectivityService"); 1469 } 1470 1471 private void enforceConnectivityInternalPermission() { 1472 mContext.enforceCallingOrSelfPermission( 1473 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1474 "ConnectivityService"); 1475 } 1476 1477 private void enforceKeepalivePermission() { 1478 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1479 } 1480 1481 public void sendConnectedBroadcast(NetworkInfo info) { 1482 enforceConnectivityInternalPermission(); 1483 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1484 } 1485 1486 private void sendInetConditionBroadcast(NetworkInfo info) { 1487 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1488 } 1489 1490 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1491 if (mLockdownTracker != null) { 1492 info = mLockdownTracker.augmentNetworkInfo(info); 1493 } 1494 1495 Intent intent = new Intent(bcastType); 1496 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1497 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1498 if (info.isFailover()) { 1499 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1500 info.setFailover(false); 1501 } 1502 if (info.getReason() != null) { 1503 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1504 } 1505 if (info.getExtraInfo() != null) { 1506 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1507 info.getExtraInfo()); 1508 } 1509 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1510 return intent; 1511 } 1512 1513 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1514 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1515 } 1516 1517 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1518 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1519 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1520 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1521 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1522 final long ident = Binder.clearCallingIdentity(); 1523 try { 1524 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1525 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1526 } finally { 1527 Binder.restoreCallingIdentity(ident); 1528 } 1529 } 1530 1531 private void sendStickyBroadcast(Intent intent) { 1532 synchronized(this) { 1533 if (!mSystemReady) { 1534 mInitialBroadcast = new Intent(intent); 1535 } 1536 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1537 if (DBG) { 1538 log("sendStickyBroadcast: action=" + intent.getAction()); 1539 } 1540 1541 Bundle options = null; 1542 final long ident = Binder.clearCallingIdentity(); 1543 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1544 final NetworkInfo ni = intent.getParcelableExtra( 1545 ConnectivityManager.EXTRA_NETWORK_INFO); 1546 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1547 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1548 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1549 } else { 1550 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1551 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1552 options = opts.toBundle(); 1553 } 1554 final IBatteryStats bs = BatteryStatsService.getService(); 1555 try { 1556 bs.noteConnectivityChanged(intent.getIntExtra( 1557 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1558 ni != null ? ni.getState().toString() : "?"); 1559 } catch (RemoteException e) { 1560 } 1561 } 1562 try { 1563 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1564 } finally { 1565 Binder.restoreCallingIdentity(ident); 1566 } 1567 } 1568 } 1569 1570 void systemReady() { 1571 loadGlobalProxy(); 1572 1573 synchronized(this) { 1574 mSystemReady = true; 1575 if (mInitialBroadcast != null) { 1576 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1577 mInitialBroadcast = null; 1578 } 1579 } 1580 // load the global proxy at startup 1581 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1582 1583 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1584 // for user to unlock device too. 1585 updateLockdownVpn(); 1586 1587 // Configure whether mobile data is always on. 1588 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1589 1590 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1591 1592 mPermissionMonitor.startMonitoring(); 1593 } 1594 1595 /** 1596 * Setup data activity tracking for the given network. 1597 * 1598 * Every {@code setupDataActivityTracking} should be paired with a 1599 * {@link #removeDataActivityTracking} for cleanup. 1600 */ 1601 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1602 final String iface = networkAgent.linkProperties.getInterfaceName(); 1603 1604 final int timeout; 1605 int type = ConnectivityManager.TYPE_NONE; 1606 1607 if (networkAgent.networkCapabilities.hasTransport( 1608 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1609 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1610 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1611 10); 1612 type = ConnectivityManager.TYPE_MOBILE; 1613 } else if (networkAgent.networkCapabilities.hasTransport( 1614 NetworkCapabilities.TRANSPORT_WIFI)) { 1615 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1616 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1617 15); 1618 type = ConnectivityManager.TYPE_WIFI; 1619 } else { 1620 // do not track any other networks 1621 timeout = 0; 1622 } 1623 1624 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1625 try { 1626 mNetd.addIdleTimer(iface, timeout, type); 1627 } catch (Exception e) { 1628 // You shall not crash! 1629 loge("Exception in setupDataActivityTracking " + e); 1630 } 1631 } 1632 } 1633 1634 /** 1635 * Remove data activity tracking when network disconnects. 1636 */ 1637 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1638 final String iface = networkAgent.linkProperties.getInterfaceName(); 1639 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1640 1641 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1642 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1643 try { 1644 // the call fails silently if no idletimer setup for this interface 1645 mNetd.removeIdleTimer(iface); 1646 } catch (Exception e) { 1647 loge("Exception in removeDataActivityTracking " + e); 1648 } 1649 } 1650 } 1651 1652 /** 1653 * Reads the network specific MTU size from reources. 1654 * and set it on it's iface. 1655 */ 1656 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1657 final String iface = newLp.getInterfaceName(); 1658 final int mtu = newLp.getMtu(); 1659 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1660 if (VDBG) log("identical MTU - not setting"); 1661 return; 1662 } 1663 1664 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1665 loge("Unexpected mtu value: " + mtu + ", " + iface); 1666 return; 1667 } 1668 1669 // Cannot set MTU without interface name 1670 if (TextUtils.isEmpty(iface)) { 1671 loge("Setting MTU size with null iface."); 1672 return; 1673 } 1674 1675 try { 1676 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1677 mNetd.setMtu(iface, mtu); 1678 } catch (Exception e) { 1679 Slog.e(TAG, "exception in setMtu()" + e); 1680 } 1681 } 1682 1683 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1684 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1685 1686 // Overridden for testing purposes to avoid writing to SystemProperties. 1687 @VisibleForTesting 1688 protected int getDefaultTcpRwnd() { 1689 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1690 } 1691 1692 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1693 if (isDefaultNetwork(nai) == false) { 1694 return; 1695 } 1696 1697 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1698 String[] values = null; 1699 if (tcpBufferSizes != null) { 1700 values = tcpBufferSizes.split(","); 1701 } 1702 1703 if (values == null || values.length != 6) { 1704 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1705 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1706 values = tcpBufferSizes.split(","); 1707 } 1708 1709 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1710 1711 try { 1712 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1713 1714 final String prefix = "/sys/kernel/ipv4/tcp_"; 1715 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1716 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1717 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1718 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1719 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1720 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1721 mCurrentTcpBufferSizes = tcpBufferSizes; 1722 } catch (IOException e) { 1723 loge("Can't set TCP buffer sizes:" + e); 1724 } 1725 1726 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1727 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1728 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1729 if (rwndValue != 0) { 1730 SystemProperties.set(sysctlKey, rwndValue.toString()); 1731 } 1732 } 1733 1734 private void flushVmDnsCache() { 1735 /* 1736 * Tell the VMs to toss their DNS caches 1737 */ 1738 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1739 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1740 /* 1741 * Connectivity events can happen before boot has completed ... 1742 */ 1743 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1744 final long ident = Binder.clearCallingIdentity(); 1745 try { 1746 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1747 } finally { 1748 Binder.restoreCallingIdentity(ident); 1749 } 1750 } 1751 1752 @Override 1753 public int getRestoreDefaultNetworkDelay(int networkType) { 1754 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1755 NETWORK_RESTORE_DELAY_PROP_NAME); 1756 if(restoreDefaultNetworkDelayStr != null && 1757 restoreDefaultNetworkDelayStr.length() != 0) { 1758 try { 1759 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1760 } catch (NumberFormatException e) { 1761 } 1762 } 1763 // if the system property isn't set, use the value for the apn type 1764 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1765 1766 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1767 (mNetConfigs[networkType] != null)) { 1768 ret = mNetConfigs[networkType].restoreTime; 1769 } 1770 return ret; 1771 } 1772 1773 private boolean argsContain(String[] args, String target) { 1774 for (String arg : args) { 1775 if (arg.equals(target)) return true; 1776 } 1777 return false; 1778 } 1779 1780 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1781 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1782 final long DIAG_TIME_MS = 5000; 1783 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1784 // Start gathering diagnostic information. 1785 netDiags.add(new NetworkDiagnostics( 1786 nai.network, 1787 new LinkProperties(nai.linkProperties), // Must be a copy. 1788 DIAG_TIME_MS)); 1789 } 1790 1791 for (NetworkDiagnostics netDiag : netDiags) { 1792 pw.println(); 1793 netDiag.waitForMeasurements(); 1794 netDiag.dump(pw); 1795 } 1796 } 1797 1798 @Override 1799 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1800 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1801 if (mContext.checkCallingOrSelfPermission( 1802 android.Manifest.permission.DUMP) 1803 != PackageManager.PERMISSION_GRANTED) { 1804 pw.println("Permission Denial: can't dump ConnectivityService " + 1805 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1806 Binder.getCallingUid()); 1807 return; 1808 } 1809 1810 if (argsContain(args, "--diag")) { 1811 dumpNetworkDiagnostics(pw); 1812 return; 1813 } 1814 1815 pw.print("NetworkFactories for:"); 1816 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1817 pw.print(" " + nfi.name); 1818 } 1819 pw.println(); 1820 pw.println(); 1821 1822 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1823 pw.print("Active default network: "); 1824 if (defaultNai == null) { 1825 pw.println("none"); 1826 } else { 1827 pw.println(defaultNai.network.netId); 1828 } 1829 pw.println(); 1830 1831 pw.println("Current Networks:"); 1832 pw.increaseIndent(); 1833 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1834 pw.println(nai.toString()); 1835 pw.increaseIndent(); 1836 pw.println("Requests:"); 1837 pw.increaseIndent(); 1838 for (int i = 0; i < nai.networkRequests.size(); i++) { 1839 pw.println(nai.networkRequests.valueAt(i).toString()); 1840 } 1841 pw.decreaseIndent(); 1842 pw.println("Lingered:"); 1843 pw.increaseIndent(); 1844 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1845 pw.decreaseIndent(); 1846 pw.decreaseIndent(); 1847 } 1848 pw.decreaseIndent(); 1849 pw.println(); 1850 1851 pw.println("Network Requests:"); 1852 pw.increaseIndent(); 1853 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1854 pw.println(nri.toString()); 1855 } 1856 pw.println(); 1857 pw.decreaseIndent(); 1858 1859 mLegacyTypeTracker.dump(pw); 1860 1861 synchronized (this) { 1862 pw.print("mNetTransitionWakeLock: currently " + 1863 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1864 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1865 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1866 } else { 1867 pw.println(", last requested never"); 1868 } 1869 } 1870 1871 pw.println(); 1872 mTethering.dump(fd, pw, args); 1873 1874 pw.println(); 1875 mKeepaliveTracker.dump(pw); 1876 1877 pw.println(); 1878 1879 if (mInetLog != null && mInetLog.size() > 0) { 1880 pw.println(); 1881 pw.println("Inet condition reports:"); 1882 pw.increaseIndent(); 1883 for(int i = 0; i < mInetLog.size(); i++) { 1884 pw.println(mInetLog.get(i)); 1885 } 1886 pw.decreaseIndent(); 1887 } 1888 1889 if (argsContain(args, "--short") == false) { 1890 pw.println(); 1891 synchronized (mValidationLogs) { 1892 pw.println("mValidationLogs (most recent first):"); 1893 for (Pair<Network,ReadOnlyLocalLog> p : mValidationLogs) { 1894 pw.println(p.first); 1895 pw.increaseIndent(); 1896 p.second.dump(fd, pw, args); 1897 pw.decreaseIndent(); 1898 } 1899 } 1900 1901 pw.println(); 1902 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1903 pw.increaseIndent(); 1904 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1905 pw.decreaseIndent(); 1906 } 1907 } 1908 1909 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, String msg) { 1910 if (nai.network == null) return false; 1911 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1912 if (officialNai != null && officialNai.equals(nai)) return true; 1913 if (officialNai != null || VDBG) { 1914 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1915 " - " + nai); 1916 } 1917 return false; 1918 } 1919 1920 private boolean isRequest(NetworkRequest request) { 1921 return mNetworkRequests.get(request).isRequest(); 1922 } 1923 1924 // must be stateless - things change under us. 1925 private class NetworkStateTrackerHandler extends Handler { 1926 public NetworkStateTrackerHandler(Looper looper) { 1927 super(looper); 1928 } 1929 1930 @Override 1931 public void handleMessage(Message msg) { 1932 NetworkInfo info; 1933 switch (msg.what) { 1934 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1935 handleAsyncChannelHalfConnect(msg); 1936 break; 1937 } 1938 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1939 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1940 if (nai != null) nai.asyncChannel.disconnect(); 1941 break; 1942 } 1943 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1944 handleAsyncChannelDisconnected(msg); 1945 break; 1946 } 1947 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1948 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1949 if (nai == null) { 1950 loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent"); 1951 } else { 1952 final NetworkCapabilities networkCapabilities = 1953 (NetworkCapabilities)msg.obj; 1954 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 1955 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 1956 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 1957 } 1958 if (nai.created && !nai.networkCapabilities.equalImmutableCapabilities( 1959 networkCapabilities)) { 1960 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 1961 + nai.networkCapabilities + " -> " + networkCapabilities); 1962 } 1963 updateCapabilities(nai, networkCapabilities); 1964 } 1965 break; 1966 } 1967 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1968 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1969 if (nai == null) { 1970 loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED"); 1971 } else { 1972 if (VDBG) { 1973 log("Update of LinkProperties for " + nai.name() + 1974 "; created=" + nai.created); 1975 } 1976 LinkProperties oldLp = nai.linkProperties; 1977 synchronized (nai) { 1978 nai.linkProperties = (LinkProperties)msg.obj; 1979 } 1980 if (nai.created) updateLinkProperties(nai, oldLp); 1981 } 1982 break; 1983 } 1984 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1985 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1986 if (nai == null) { 1987 loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent"); 1988 break; 1989 } 1990 info = (NetworkInfo) msg.obj; 1991 updateNetworkInfo(nai, info); 1992 break; 1993 } 1994 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1995 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1996 if (nai == null) { 1997 loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent"); 1998 break; 1999 } 2000 Integer score = (Integer) msg.obj; 2001 if (score != null) updateNetworkScore(nai, score.intValue()); 2002 break; 2003 } 2004 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2005 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2006 if (nai == null) { 2007 loge("EVENT_UID_RANGES_ADDED from unknown NetworkAgent"); 2008 break; 2009 } 2010 try { 2011 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2012 } catch (Exception e) { 2013 // Never crash! 2014 loge("Exception in addVpnUidRanges: " + e); 2015 } 2016 break; 2017 } 2018 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2019 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2020 if (nai == null) { 2021 loge("EVENT_UID_RANGES_REMOVED from unknown NetworkAgent"); 2022 break; 2023 } 2024 try { 2025 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2026 } catch (Exception e) { 2027 // Never crash! 2028 loge("Exception in removeVpnUidRanges: " + e); 2029 } 2030 break; 2031 } 2032 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2033 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2034 if (nai == null) { 2035 loge("EVENT_SET_EXPLICITLY_SELECTED from unknown NetworkAgent"); 2036 break; 2037 } 2038 if (nai.created && !nai.networkMisc.explicitlySelected) { 2039 loge("ERROR: created network explicitly selected."); 2040 } 2041 nai.networkMisc.explicitlySelected = true; 2042 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2043 break; 2044 } 2045 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2046 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2047 if (nai == null) { 2048 loge("EVENT_PACKET_KEEPALIVE from unknown NetworkAgent"); 2049 break; 2050 } 2051 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2052 break; 2053 } 2054 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2055 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2056 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_TESTED")) { 2057 final boolean valid = 2058 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2059 if (DBG) log(nai.name() + " validation " + (valid ? " passed" : "failed")); 2060 if (valid != nai.lastValidated) { 2061 final int oldScore = nai.getCurrentScore(); 2062 nai.lastValidated = valid; 2063 nai.everValidated |= valid; 2064 updateCapabilities(nai, nai.networkCapabilities); 2065 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2066 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2067 } 2068 updateInetCondition(nai); 2069 // Let the NetworkAgent know the state of its network 2070 nai.asyncChannel.sendMessage( 2071 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2072 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2073 0, null); 2074 } 2075 break; 2076 } 2077 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 2078 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2079 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_LINGER_COMPLETE")) { 2080 handleLingerComplete(nai); 2081 } 2082 break; 2083 } 2084 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2085 final int netId = msg.arg2; 2086 final boolean visible = (msg.arg1 != 0); 2087 final NetworkAgentInfo nai; 2088 synchronized (mNetworkForNetId) { 2089 nai = mNetworkForNetId.get(netId); 2090 } 2091 // If captive portal status has changed, update capabilities. 2092 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2093 nai.lastCaptivePortalDetected = visible; 2094 nai.everCaptivePortalDetected |= visible; 2095 updateCapabilities(nai, nai.networkCapabilities); 2096 } 2097 if (!visible) { 2098 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2099 } else { 2100 if (nai == null) { 2101 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2102 break; 2103 } 2104 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2105 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2106 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2107 } 2108 break; 2109 } 2110 } 2111 } 2112 } 2113 2114 private void linger(NetworkAgentInfo nai) { 2115 nai.lingering = true; 2116 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 2117 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 2118 } 2119 2120 // Cancel any lingering so the linger timeout doesn't teardown a network. 2121 // This should be called when a network begins satisfying a NetworkRequest. 2122 // Note: depending on what state the NetworkMonitor is in (e.g., 2123 // if it's awaiting captive portal login, or if validation failed), this 2124 // may trigger a re-evaluation of the network. 2125 private void unlinger(NetworkAgentInfo nai) { 2126 nai.networkLingered.clear(); 2127 if (!nai.lingering) return; 2128 nai.lingering = false; 2129 if (VDBG) log("Canceling linger of " + nai.name()); 2130 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2131 } 2132 2133 private void handleAsyncChannelHalfConnect(Message msg) { 2134 AsyncChannel ac = (AsyncChannel) msg.obj; 2135 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2136 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2137 if (VDBG) log("NetworkFactory connected"); 2138 // A network factory has connected. Send it all current NetworkRequests. 2139 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2140 if (!nri.isRequest()) continue; 2141 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2142 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2143 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2144 } 2145 } else { 2146 loge("Error connecting NetworkFactory"); 2147 mNetworkFactoryInfos.remove(msg.obj); 2148 } 2149 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2150 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2151 if (VDBG) log("NetworkAgent connected"); 2152 // A network agent has requested a connection. Establish the connection. 2153 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2154 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2155 } else { 2156 loge("Error connecting NetworkAgent"); 2157 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2158 if (nai != null) { 2159 final boolean wasDefault = isDefaultNetwork(nai); 2160 synchronized (mNetworkForNetId) { 2161 mNetworkForNetId.remove(nai.network.netId); 2162 mNetIdInUse.delete(nai.network.netId); 2163 } 2164 // Just in case. 2165 mLegacyTypeTracker.remove(nai, wasDefault); 2166 } 2167 } 2168 } 2169 } 2170 2171 private void handleAsyncChannelDisconnected(Message msg) { 2172 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2173 if (nai != null) { 2174 if (DBG) { 2175 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2176 } 2177 // A network agent has disconnected. 2178 // TODO - if we move the logic to the network agent (have them disconnect 2179 // because they lost all their requests or because their score isn't good) 2180 // then they would disconnect organically, report their new state and then 2181 // disconnect the channel. 2182 if (nai.networkInfo.isConnected()) { 2183 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2184 null, null); 2185 } 2186 final boolean wasDefault = isDefaultNetwork(nai); 2187 if (wasDefault) { 2188 mDefaultInetConditionPublished = 0; 2189 } 2190 notifyIfacesChangedForNetworkStats(); 2191 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2192 // by other networks that are already connected. Perhaps that can be done by 2193 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2194 // of rematchAllNetworksAndRequests 2195 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2196 mKeepaliveTracker.handleStopAllKeepalives(nai, 2197 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2198 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2199 mNetworkAgentInfos.remove(msg.replyTo); 2200 updateClat(null, nai.linkProperties, nai); 2201 synchronized (mNetworkForNetId) { 2202 // Remove the NetworkAgent, but don't mark the netId as 2203 // available until we've told netd to delete it below. 2204 mNetworkForNetId.remove(nai.network.netId); 2205 } 2206 // Remove all previously satisfied requests. 2207 for (int i = 0; i < nai.networkRequests.size(); i++) { 2208 NetworkRequest request = nai.networkRequests.valueAt(i); 2209 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2210 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2211 mNetworkForRequestId.remove(request.requestId); 2212 sendUpdatedScoreToFactories(request, 0); 2213 } 2214 } 2215 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2216 removeDataActivityTracking(nai); 2217 notifyLockdownVpn(nai); 2218 requestNetworkTransitionWakelock(nai.name()); 2219 } 2220 mLegacyTypeTracker.remove(nai, wasDefault); 2221 rematchAllNetworksAndRequests(null, 0); 2222 if (nai.created) { 2223 // Tell netd to clean up the configuration for this network 2224 // (routing rules, DNS, etc). 2225 // This may be slow as it requires a lot of netd shelling out to ip and 2226 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2227 // after we've rematched networks with requests which should make a potential 2228 // fallback network the default or requested a new network from the 2229 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2230 // long time. 2231 try { 2232 mNetd.removeNetwork(nai.network.netId); 2233 } catch (Exception e) { 2234 loge("Exception removing network: " + e); 2235 } 2236 } 2237 synchronized (mNetworkForNetId) { 2238 mNetIdInUse.delete(nai.network.netId); 2239 } 2240 } else { 2241 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2242 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2243 } 2244 } 2245 2246 // If this method proves to be too slow then we can maintain a separate 2247 // pendingIntent => NetworkRequestInfo map. 2248 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2249 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2250 Intent intent = pendingIntent.getIntent(); 2251 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2252 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2253 if (existingPendingIntent != null && 2254 existingPendingIntent.getIntent().filterEquals(intent)) { 2255 return entry.getValue(); 2256 } 2257 } 2258 return null; 2259 } 2260 2261 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2262 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2263 2264 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2265 if (existingRequest != null) { // remove the existing request. 2266 if (DBG) log("Replacing " + existingRequest.request + " with " 2267 + nri.request + " because their intents matched."); 2268 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2269 } 2270 handleRegisterNetworkRequest(nri); 2271 } 2272 2273 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2274 mNetworkRequests.put(nri.request, nri); 2275 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2276 if (!nri.isRequest()) { 2277 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2278 if (nri.request.networkCapabilities.hasSignalStrength() && 2279 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2280 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2281 } 2282 } 2283 } 2284 rematchAllNetworksAndRequests(null, 0); 2285 if (nri.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2286 sendUpdatedScoreToFactories(nri.request, 0); 2287 } 2288 } 2289 2290 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2291 int callingUid) { 2292 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2293 if (nri != null) { 2294 handleReleaseNetworkRequest(nri.request, callingUid); 2295 } 2296 } 2297 2298 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2299 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2300 // would it have a chance of satisfying any NetworkRequests. 2301 private boolean unneeded(NetworkAgentInfo nai) { 2302 if (!nai.created || nai.isVPN() || nai.lingering) return false; 2303 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2304 // If this Network is already the highest scoring Network for a request, or if 2305 // there is hope for it to become one if it validated, then it is needed. 2306 if (nri.isRequest() && nai.satisfies(nri.request) && 2307 (nai.networkRequests.get(nri.request.requestId) != null || 2308 // Note that this catches two important cases: 2309 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2310 // is currently satisfying the request. This is desirable when 2311 // cellular ends up validating but WiFi does not. 2312 // 2. Unvalidated WiFi will not be reaped when validated cellular 2313 // is currently satisfying the request. This is desirable when 2314 // WiFi ends up validating and out scoring cellular. 2315 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2316 nai.getCurrentScoreAsValidated())) { 2317 return false; 2318 } 2319 } 2320 return true; 2321 } 2322 2323 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2324 NetworkRequestInfo nri = mNetworkRequests.get(request); 2325 if (nri != null) { 2326 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2327 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2328 return; 2329 } 2330 if (DBG) log("releasing NetworkRequest " + request); 2331 nri.unlinkDeathRecipient(); 2332 mNetworkRequests.remove(request); 2333 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2334 if (nri.isRequest()) { 2335 // Find all networks that are satisfying this request and remove the request 2336 // from their request lists. 2337 // TODO - it's my understanding that for a request there is only a single 2338 // network satisfying it, so this loop is wasteful 2339 boolean wasKept = false; 2340 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2341 if (nai.networkRequests.get(nri.request.requestId) != null) { 2342 nai.networkRequests.remove(nri.request.requestId); 2343 if (DBG) { 2344 log(" Removing from current network " + nai.name() + 2345 ", leaving " + nai.networkRequests.size() + 2346 " requests."); 2347 } 2348 if (unneeded(nai)) { 2349 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2350 teardownUnneededNetwork(nai); 2351 } else { 2352 // suspect there should only be one pass through here 2353 // but if any were kept do the check below 2354 wasKept |= true; 2355 } 2356 } 2357 } 2358 2359 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2360 if (nai != null) { 2361 mNetworkForRequestId.remove(nri.request.requestId); 2362 } 2363 // Maintain the illusion. When this request arrived, we might have pretended 2364 // that a network connected to serve it, even though the network was already 2365 // connected. Now that this request has gone away, we might have to pretend 2366 // that the network disconnected. LegacyTypeTracker will generate that 2367 // phantom disconnect for this type. 2368 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2369 boolean doRemove = true; 2370 if (wasKept) { 2371 // check if any of the remaining requests for this network are for the 2372 // same legacy type - if so, don't remove the nai 2373 for (int i = 0; i < nai.networkRequests.size(); i++) { 2374 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2375 if (otherRequest.legacyType == nri.request.legacyType && 2376 isRequest(otherRequest)) { 2377 if (DBG) log(" still have other legacy request - leaving"); 2378 doRemove = false; 2379 } 2380 } 2381 } 2382 2383 if (doRemove) { 2384 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2385 } 2386 } 2387 2388 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2389 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2390 nri.request); 2391 } 2392 } else { 2393 // listens don't have a singular affectedNetwork. Check all networks to see 2394 // if this listen request applies and remove it. 2395 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2396 nai.networkRequests.remove(nri.request.requestId); 2397 if (nri.request.networkCapabilities.hasSignalStrength() && 2398 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2399 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2400 } 2401 } 2402 } 2403 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2404 } 2405 } 2406 2407 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2408 enforceConnectivityInternalPermission(); 2409 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2410 accept ? 1 : 0, always ? 1: 0, network)); 2411 } 2412 2413 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2414 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2415 " accept=" + accept + " always=" + always); 2416 2417 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2418 if (nai == null) { 2419 // Nothing to do. 2420 return; 2421 } 2422 2423 if (nai.everValidated) { 2424 // The network validated while the dialog box was up. Take no action. 2425 return; 2426 } 2427 2428 if (!nai.networkMisc.explicitlySelected) { 2429 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2430 } 2431 2432 if (accept != nai.networkMisc.acceptUnvalidated) { 2433 int oldScore = nai.getCurrentScore(); 2434 nai.networkMisc.acceptUnvalidated = accept; 2435 rematchAllNetworksAndRequests(nai, oldScore); 2436 sendUpdatedScoreToFactories(nai); 2437 } 2438 2439 if (always) { 2440 nai.asyncChannel.sendMessage( 2441 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2442 } 2443 2444 if (!accept) { 2445 // Tell the NetworkAgent to not automatically reconnect to the network. 2446 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2447 // Teardown the nework. 2448 teardownUnneededNetwork(nai); 2449 } 2450 2451 } 2452 2453 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2454 if (DBG) log("scheduleUnvalidatedPrompt " + nai.network); 2455 mHandler.sendMessageDelayed( 2456 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2457 PROMPT_UNVALIDATED_DELAY_MS); 2458 } 2459 2460 private void handlePromptUnvalidated(Network network) { 2461 if (DBG) log("handlePromptUnvalidated " + network); 2462 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2463 2464 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2465 // we haven't already been told to switch to it regardless of whether it validated or not. 2466 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2467 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2468 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2469 return; 2470 } 2471 2472 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2473 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2474 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2475 intent.setClassName("com.android.settings", 2476 "com.android.settings.wifi.WifiNoInternetDialog"); 2477 2478 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2479 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2480 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2481 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2482 } 2483 2484 private class InternalHandler extends Handler { 2485 public InternalHandler(Looper looper) { 2486 super(looper); 2487 } 2488 2489 @Override 2490 public void handleMessage(Message msg) { 2491 switch (msg.what) { 2492 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2493 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2494 String causedBy = null; 2495 synchronized (ConnectivityService.this) { 2496 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2497 mNetTransitionWakeLock.isHeld()) { 2498 mNetTransitionWakeLock.release(); 2499 causedBy = mNetTransitionWakeLockCausedBy; 2500 } else { 2501 break; 2502 } 2503 } 2504 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2505 log("Failed to find a new network - expiring NetTransition Wakelock"); 2506 } else { 2507 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2508 " cleared because we found a replacement network"); 2509 } 2510 break; 2511 } 2512 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2513 handleDeprecatedGlobalHttpProxy(); 2514 break; 2515 } 2516 case EVENT_PROXY_HAS_CHANGED: { 2517 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2518 break; 2519 } 2520 case EVENT_REGISTER_NETWORK_FACTORY: { 2521 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2522 break; 2523 } 2524 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2525 handleUnregisterNetworkFactory((Messenger)msg.obj); 2526 break; 2527 } 2528 case EVENT_REGISTER_NETWORK_AGENT: { 2529 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2530 break; 2531 } 2532 case EVENT_REGISTER_NETWORK_REQUEST: 2533 case EVENT_REGISTER_NETWORK_LISTENER: { 2534 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2535 break; 2536 } 2537 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2538 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2539 handleRegisterNetworkRequestWithIntent(msg); 2540 break; 2541 } 2542 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2543 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2544 break; 2545 } 2546 case EVENT_RELEASE_NETWORK_REQUEST: { 2547 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2548 break; 2549 } 2550 case EVENT_SET_ACCEPT_UNVALIDATED: { 2551 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2552 break; 2553 } 2554 case EVENT_PROMPT_UNVALIDATED: { 2555 handlePromptUnvalidated((Network) msg.obj); 2556 break; 2557 } 2558 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2559 handleMobileDataAlwaysOn(); 2560 break; 2561 } 2562 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2563 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2564 mKeepaliveTracker.handleStartKeepalive(msg); 2565 break; 2566 } 2567 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2568 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2569 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2570 int slot = msg.arg1; 2571 int reason = msg.arg2; 2572 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2573 break; 2574 } 2575 case EVENT_SYSTEM_READY: { 2576 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2577 nai.networkMonitor.systemReady = true; 2578 } 2579 break; 2580 } 2581 } 2582 } 2583 } 2584 2585 // javadoc from interface 2586 public int tether(String iface) { 2587 ConnectivityManager.enforceTetherChangePermission(mContext); 2588 if (isTetheringSupported()) { 2589 return mTethering.tether(iface); 2590 } else { 2591 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2592 } 2593 } 2594 2595 // javadoc from interface 2596 public int untether(String iface) { 2597 ConnectivityManager.enforceTetherChangePermission(mContext); 2598 2599 if (isTetheringSupported()) { 2600 return mTethering.untether(iface); 2601 } else { 2602 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2603 } 2604 } 2605 2606 // javadoc from interface 2607 public int getLastTetherError(String iface) { 2608 enforceTetherAccessPermission(); 2609 2610 if (isTetheringSupported()) { 2611 return mTethering.getLastTetherError(iface); 2612 } else { 2613 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2614 } 2615 } 2616 2617 // TODO - proper iface API for selection by property, inspection, etc 2618 public String[] getTetherableUsbRegexs() { 2619 enforceTetherAccessPermission(); 2620 if (isTetheringSupported()) { 2621 return mTethering.getTetherableUsbRegexs(); 2622 } else { 2623 return new String[0]; 2624 } 2625 } 2626 2627 public String[] getTetherableWifiRegexs() { 2628 enforceTetherAccessPermission(); 2629 if (isTetheringSupported()) { 2630 return mTethering.getTetherableWifiRegexs(); 2631 } else { 2632 return new String[0]; 2633 } 2634 } 2635 2636 public String[] getTetherableBluetoothRegexs() { 2637 enforceTetherAccessPermission(); 2638 if (isTetheringSupported()) { 2639 return mTethering.getTetherableBluetoothRegexs(); 2640 } else { 2641 return new String[0]; 2642 } 2643 } 2644 2645 public int setUsbTethering(boolean enable) { 2646 ConnectivityManager.enforceTetherChangePermission(mContext); 2647 if (isTetheringSupported()) { 2648 return mTethering.setUsbTethering(enable); 2649 } else { 2650 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2651 } 2652 } 2653 2654 // TODO - move iface listing, queries, etc to new module 2655 // javadoc from interface 2656 public String[] getTetherableIfaces() { 2657 enforceTetherAccessPermission(); 2658 return mTethering.getTetherableIfaces(); 2659 } 2660 2661 public String[] getTetheredIfaces() { 2662 enforceTetherAccessPermission(); 2663 return mTethering.getTetheredIfaces(); 2664 } 2665 2666 public String[] getTetheringErroredIfaces() { 2667 enforceTetherAccessPermission(); 2668 return mTethering.getErroredIfaces(); 2669 } 2670 2671 public String[] getTetheredDhcpRanges() { 2672 enforceConnectivityInternalPermission(); 2673 return mTethering.getTetheredDhcpRanges(); 2674 } 2675 2676 // if ro.tether.denied = true we default to no tethering 2677 // gservices could set the secure setting to 1 though to enable it on a build where it 2678 // had previously been turned off. 2679 @Override 2680 public boolean isTetheringSupported() { 2681 enforceTetherAccessPermission(); 2682 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2683 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2684 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2685 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2686 return tetherEnabledInSettings && mUserManager.isAdminUser() && 2687 ((mTethering.getTetherableUsbRegexs().length != 0 || 2688 mTethering.getTetherableWifiRegexs().length != 0 || 2689 mTethering.getTetherableBluetoothRegexs().length != 0) && 2690 mTethering.getUpstreamIfaceTypes().length != 0); 2691 } 2692 2693 @Override 2694 public void startTethering(int type, ResultReceiver receiver, 2695 boolean showProvisioningUi) { 2696 ConnectivityManager.enforceTetherChangePermission(mContext); 2697 if (!isTetheringSupported()) { 2698 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 2699 return; 2700 } 2701 mTethering.startTethering(type, receiver, showProvisioningUi); 2702 } 2703 2704 @Override 2705 public void stopTethering(int type) { 2706 ConnectivityManager.enforceTetherChangePermission(mContext); 2707 mTethering.stopTethering(type); 2708 } 2709 2710 // Called when we lose the default network and have no replacement yet. 2711 // This will automatically be cleared after X seconds or a new default network 2712 // becomes CONNECTED, whichever happens first. The timer is started by the 2713 // first caller and not restarted by subsequent callers. 2714 private void requestNetworkTransitionWakelock(String forWhom) { 2715 int serialNum = 0; 2716 synchronized (this) { 2717 if (mNetTransitionWakeLock.isHeld()) return; 2718 serialNum = ++mNetTransitionWakeLockSerialNumber; 2719 mNetTransitionWakeLock.acquire(); 2720 mNetTransitionWakeLockCausedBy = forWhom; 2721 } 2722 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2723 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2724 mNetTransitionWakeLockTimeout); 2725 return; 2726 } 2727 2728 // 100 percent is full good, 0 is full bad. 2729 public void reportInetCondition(int networkType, int percentage) { 2730 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2731 if (nai == null) return; 2732 reportNetworkConnectivity(nai.network, percentage > 50); 2733 } 2734 2735 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2736 enforceAccessPermission(); 2737 enforceInternetPermission(); 2738 2739 NetworkAgentInfo nai; 2740 if (network == null) { 2741 nai = getDefaultNetwork(); 2742 } else { 2743 nai = getNetworkAgentInfoForNetwork(network); 2744 } 2745 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2746 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2747 return; 2748 } 2749 // Revalidate if the app report does not match our current validated state. 2750 if (hasConnectivity == nai.lastValidated) return; 2751 final int uid = Binder.getCallingUid(); 2752 if (DBG) { 2753 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2754 ") by " + uid); 2755 } 2756 synchronized (nai) { 2757 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2758 // which isn't meant to work on uncreated networks. 2759 if (!nai.created) return; 2760 2761 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2762 2763 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2764 } 2765 } 2766 2767 private ProxyInfo getDefaultProxy() { 2768 // this information is already available as a world read/writable jvm property 2769 // so this API change wouldn't have a benifit. It also breaks the passing 2770 // of proxy info to all the JVMs. 2771 // enforceAccessPermission(); 2772 synchronized (mProxyLock) { 2773 ProxyInfo ret = mGlobalProxy; 2774 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2775 return ret; 2776 } 2777 } 2778 2779 public ProxyInfo getProxyForNetwork(Network network) { 2780 if (network == null) return getDefaultProxy(); 2781 final ProxyInfo globalProxy = getGlobalProxy(); 2782 if (globalProxy != null) return globalProxy; 2783 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 2784 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 2785 // caller may not have. 2786 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2787 if (nai == null) return null; 2788 synchronized (nai) { 2789 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 2790 if (proxyInfo == null) return null; 2791 return new ProxyInfo(proxyInfo); 2792 } 2793 } 2794 2795 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2796 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2797 // proxy is null then there is no proxy in place). 2798 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2799 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2800 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2801 proxy = null; 2802 } 2803 return proxy; 2804 } 2805 2806 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2807 // better for determining if a new proxy broadcast is necessary: 2808 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2809 // avoid unnecessary broadcasts. 2810 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2811 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2812 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2813 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2814 // all set. 2815 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2816 a = canonicalizeProxyInfo(a); 2817 b = canonicalizeProxyInfo(b); 2818 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2819 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2820 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2821 } 2822 2823 public void setGlobalProxy(ProxyInfo proxyProperties) { 2824 enforceConnectivityInternalPermission(); 2825 2826 synchronized (mProxyLock) { 2827 if (proxyProperties == mGlobalProxy) return; 2828 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2829 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2830 2831 String host = ""; 2832 int port = 0; 2833 String exclList = ""; 2834 String pacFileUrl = ""; 2835 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2836 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2837 if (!proxyProperties.isValid()) { 2838 if (DBG) 2839 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2840 return; 2841 } 2842 mGlobalProxy = new ProxyInfo(proxyProperties); 2843 host = mGlobalProxy.getHost(); 2844 port = mGlobalProxy.getPort(); 2845 exclList = mGlobalProxy.getExclusionListAsString(); 2846 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2847 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2848 } 2849 } else { 2850 mGlobalProxy = null; 2851 } 2852 ContentResolver res = mContext.getContentResolver(); 2853 final long token = Binder.clearCallingIdentity(); 2854 try { 2855 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2856 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2857 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2858 exclList); 2859 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2860 } finally { 2861 Binder.restoreCallingIdentity(token); 2862 } 2863 2864 if (mGlobalProxy == null) { 2865 proxyProperties = mDefaultProxy; 2866 } 2867 sendProxyBroadcast(proxyProperties); 2868 } 2869 } 2870 2871 private void loadGlobalProxy() { 2872 ContentResolver res = mContext.getContentResolver(); 2873 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2874 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2875 String exclList = Settings.Global.getString(res, 2876 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2877 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2878 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2879 ProxyInfo proxyProperties; 2880 if (!TextUtils.isEmpty(pacFileUrl)) { 2881 proxyProperties = new ProxyInfo(pacFileUrl); 2882 } else { 2883 proxyProperties = new ProxyInfo(host, port, exclList); 2884 } 2885 if (!proxyProperties.isValid()) { 2886 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2887 return; 2888 } 2889 2890 synchronized (mProxyLock) { 2891 mGlobalProxy = proxyProperties; 2892 } 2893 } 2894 } 2895 2896 public ProxyInfo getGlobalProxy() { 2897 // this information is already available as a world read/writable jvm property 2898 // so this API change wouldn't have a benifit. It also breaks the passing 2899 // of proxy info to all the JVMs. 2900 // enforceAccessPermission(); 2901 synchronized (mProxyLock) { 2902 return mGlobalProxy; 2903 } 2904 } 2905 2906 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2907 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2908 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2909 proxy = null; 2910 } 2911 synchronized (mProxyLock) { 2912 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2913 if (mDefaultProxy == proxy) return; // catches repeated nulls 2914 if (proxy != null && !proxy.isValid()) { 2915 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2916 return; 2917 } 2918 2919 // This call could be coming from the PacManager, containing the port of the local 2920 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2921 // global (to get the correct local port), and send a broadcast. 2922 // TODO: Switch PacManager to have its own message to send back rather than 2923 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2924 if ((mGlobalProxy != null) && (proxy != null) 2925 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2926 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2927 mGlobalProxy = proxy; 2928 sendProxyBroadcast(mGlobalProxy); 2929 return; 2930 } 2931 mDefaultProxy = proxy; 2932 2933 if (mGlobalProxy != null) return; 2934 if (!mDefaultProxyDisabled) { 2935 sendProxyBroadcast(proxy); 2936 } 2937 } 2938 } 2939 2940 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2941 // This method gets called when any network changes proxy, but the broadcast only ever contains 2942 // the default proxy (even if it hasn't changed). 2943 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2944 // world where an app might be bound to a non-default network. 2945 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2946 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2947 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2948 2949 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2950 sendProxyBroadcast(getDefaultProxy()); 2951 } 2952 } 2953 2954 private void handleDeprecatedGlobalHttpProxy() { 2955 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2956 Settings.Global.HTTP_PROXY); 2957 if (!TextUtils.isEmpty(proxy)) { 2958 String data[] = proxy.split(":"); 2959 if (data.length == 0) { 2960 return; 2961 } 2962 2963 String proxyHost = data[0]; 2964 int proxyPort = 8080; 2965 if (data.length > 1) { 2966 try { 2967 proxyPort = Integer.parseInt(data[1]); 2968 } catch (NumberFormatException e) { 2969 return; 2970 } 2971 } 2972 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2973 setGlobalProxy(p); 2974 } 2975 } 2976 2977 private void sendProxyBroadcast(ProxyInfo proxy) { 2978 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2979 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2980 if (DBG) log("sending Proxy Broadcast for " + proxy); 2981 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2982 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2983 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2984 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2985 final long ident = Binder.clearCallingIdentity(); 2986 try { 2987 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2988 } finally { 2989 Binder.restoreCallingIdentity(ident); 2990 } 2991 } 2992 2993 private static class SettingsObserver extends ContentObserver { 2994 final private HashMap<Uri, Integer> mUriEventMap; 2995 final private Context mContext; 2996 final private Handler mHandler; 2997 2998 SettingsObserver(Context context, Handler handler) { 2999 super(null); 3000 mUriEventMap = new HashMap<Uri, Integer>(); 3001 mContext = context; 3002 mHandler = handler; 3003 } 3004 3005 void observe(Uri uri, int what) { 3006 mUriEventMap.put(uri, what); 3007 final ContentResolver resolver = mContext.getContentResolver(); 3008 resolver.registerContentObserver(uri, false, this); 3009 } 3010 3011 @Override 3012 public void onChange(boolean selfChange) { 3013 Slog.wtf(TAG, "Should never be reached."); 3014 } 3015 3016 @Override 3017 public void onChange(boolean selfChange, Uri uri) { 3018 final Integer what = mUriEventMap.get(uri); 3019 if (what != null) { 3020 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3021 } else { 3022 loge("No matching event to send for URI=" + uri); 3023 } 3024 } 3025 } 3026 3027 private static void log(String s) { 3028 Slog.d(TAG, s); 3029 } 3030 3031 private static void loge(String s) { 3032 Slog.e(TAG, s); 3033 } 3034 3035 private static <T> T checkNotNull(T value, String message) { 3036 if (value == null) { 3037 throw new NullPointerException(message); 3038 } 3039 return value; 3040 } 3041 3042 /** 3043 * Prepare for a VPN application. 3044 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3045 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3046 * 3047 * @param oldPackage Package name of the application which currently controls VPN, which will 3048 * be replaced. If there is no such application, this should should either be 3049 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3050 * @param newPackage Package name of the application which should gain control of VPN, or 3051 * {@code null} to disable. 3052 * @param userId User for whom to prepare the new VPN. 3053 * 3054 * @hide 3055 */ 3056 @Override 3057 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3058 int userId) { 3059 enforceCrossUserPermission(userId); 3060 throwIfLockdownEnabled(); 3061 3062 synchronized(mVpns) { 3063 Vpn vpn = mVpns.get(userId); 3064 if (vpn != null) { 3065 return vpn.prepare(oldPackage, newPackage); 3066 } else { 3067 return false; 3068 } 3069 } 3070 } 3071 3072 /** 3073 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3074 * This method is used by system-privileged apps. 3075 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3076 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3077 * 3078 * @param packageName The package for which authorization state should change. 3079 * @param userId User for whom {@code packageName} is installed. 3080 * @param authorized {@code true} if this app should be able to start a VPN connection without 3081 * explicit user approval, {@code false} if not. 3082 * 3083 * @hide 3084 */ 3085 @Override 3086 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3087 enforceCrossUserPermission(userId); 3088 3089 synchronized(mVpns) { 3090 Vpn vpn = mVpns.get(userId); 3091 if (vpn != null) { 3092 vpn.setPackageAuthorization(packageName, authorized); 3093 } 3094 } 3095 } 3096 3097 /** 3098 * Configure a TUN interface and return its file descriptor. Parameters 3099 * are encoded and opaque to this class. This method is used by VpnBuilder 3100 * and not available in ConnectivityManager. Permissions are checked in 3101 * Vpn class. 3102 * @hide 3103 */ 3104 @Override 3105 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3106 throwIfLockdownEnabled(); 3107 int user = UserHandle.getUserId(Binder.getCallingUid()); 3108 synchronized(mVpns) { 3109 return mVpns.get(user).establish(config); 3110 } 3111 } 3112 3113 /** 3114 * Start legacy VPN, controlling native daemons as needed. Creates a 3115 * secondary thread to perform connection work, returning quickly. 3116 */ 3117 @Override 3118 public void startLegacyVpn(VpnProfile profile) { 3119 throwIfLockdownEnabled(); 3120 final LinkProperties egress = getActiveLinkProperties(); 3121 if (egress == null) { 3122 throw new IllegalStateException("Missing active network connection"); 3123 } 3124 int user = UserHandle.getUserId(Binder.getCallingUid()); 3125 synchronized(mVpns) { 3126 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3127 } 3128 } 3129 3130 /** 3131 * Return the information of the ongoing legacy VPN. This method is used 3132 * by VpnSettings and not available in ConnectivityManager. Permissions 3133 * are checked in Vpn class. 3134 */ 3135 @Override 3136 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3137 enforceCrossUserPermission(userId); 3138 if (mLockdownEnabled) { 3139 return null; 3140 } 3141 3142 synchronized(mVpns) { 3143 return mVpns.get(userId).getLegacyVpnInfo(); 3144 } 3145 } 3146 3147 /** 3148 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3149 * and not available in ConnectivityManager. 3150 */ 3151 @Override 3152 public VpnInfo[] getAllVpnInfo() { 3153 enforceConnectivityInternalPermission(); 3154 if (mLockdownEnabled) { 3155 return new VpnInfo[0]; 3156 } 3157 3158 synchronized(mVpns) { 3159 List<VpnInfo> infoList = new ArrayList<>(); 3160 for (int i = 0; i < mVpns.size(); i++) { 3161 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3162 if (info != null) { 3163 infoList.add(info); 3164 } 3165 } 3166 return infoList.toArray(new VpnInfo[infoList.size()]); 3167 } 3168 } 3169 3170 /** 3171 * @return VPN information for accounting, or null if we can't retrieve all required 3172 * information, e.g primary underlying iface. 3173 */ 3174 @Nullable 3175 private VpnInfo createVpnInfo(Vpn vpn) { 3176 VpnInfo info = vpn.getVpnInfo(); 3177 if (info == null) { 3178 return null; 3179 } 3180 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3181 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3182 // the underlyingNetworks list. 3183 if (underlyingNetworks == null) { 3184 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3185 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3186 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3187 } 3188 } else if (underlyingNetworks.length > 0) { 3189 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3190 if (linkProperties != null) { 3191 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3192 } 3193 } 3194 return info.primaryUnderlyingIface == null ? null : info; 3195 } 3196 3197 /** 3198 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3199 * VpnDialogs and not available in ConnectivityManager. 3200 * Permissions are checked in Vpn class. 3201 * @hide 3202 */ 3203 @Override 3204 public VpnConfig getVpnConfig(int userId) { 3205 enforceCrossUserPermission(userId); 3206 synchronized(mVpns) { 3207 Vpn vpn = mVpns.get(userId); 3208 if (vpn != null) { 3209 return vpn.getVpnConfig(); 3210 } else { 3211 return null; 3212 } 3213 } 3214 } 3215 3216 @Override 3217 public boolean updateLockdownVpn() { 3218 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3219 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3220 return false; 3221 } 3222 3223 // Tear down existing lockdown if profile was removed 3224 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3225 if (mLockdownEnabled) { 3226 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3227 final VpnProfile profile = VpnProfile.decode( 3228 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3229 if (profile == null) { 3230 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3231 setLockdownTracker(null); 3232 return true; 3233 } 3234 int user = UserHandle.getUserId(Binder.getCallingUid()); 3235 synchronized(mVpns) { 3236 Vpn vpn = mVpns.get(user); 3237 if (vpn == null) { 3238 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3239 return false; 3240 } 3241 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3242 } 3243 } else { 3244 setLockdownTracker(null); 3245 } 3246 3247 return true; 3248 } 3249 3250 /** 3251 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3252 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3253 */ 3254 private void setLockdownTracker(LockdownVpnTracker tracker) { 3255 // Shutdown any existing tracker 3256 final LockdownVpnTracker existing = mLockdownTracker; 3257 mLockdownTracker = null; 3258 if (existing != null) { 3259 existing.shutdown(); 3260 } 3261 3262 try { 3263 if (tracker != null) { 3264 mNetd.setFirewallEnabled(true); 3265 mNetd.setFirewallInterfaceRule("lo", true); 3266 mLockdownTracker = tracker; 3267 mLockdownTracker.init(); 3268 } else { 3269 mNetd.setFirewallEnabled(false); 3270 } 3271 } catch (RemoteException e) { 3272 // ignored; NMS lives inside system_server 3273 } 3274 } 3275 3276 private void throwIfLockdownEnabled() { 3277 if (mLockdownEnabled) { 3278 throw new IllegalStateException("Unavailable in lockdown mode"); 3279 } 3280 } 3281 3282 /** 3283 * Sets up or tears down the always-on VPN for user {@param user} as appropriate. 3284 * 3285 * @return {@code false} in case of errors; {@code true} otherwise. 3286 */ 3287 private boolean updateAlwaysOnVpn(int user) { 3288 final String lockdownPackage = getAlwaysOnVpnPackage(user); 3289 if (lockdownPackage == null) { 3290 return true; 3291 } 3292 3293 // Create an intent to start the VPN service declared in the app's manifest. 3294 Intent serviceIntent = new Intent(VpnConfig.SERVICE_INTERFACE); 3295 serviceIntent.setPackage(lockdownPackage); 3296 3297 try { 3298 return mContext.startServiceAsUser(serviceIntent, UserHandle.of(user)) != null; 3299 } catch (RuntimeException e) { 3300 return false; 3301 } 3302 } 3303 3304 @Override 3305 public boolean setAlwaysOnVpnPackage(int userId, String packageName) { 3306 enforceConnectivityInternalPermission(); 3307 enforceCrossUserPermission(userId); 3308 3309 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3310 if (LockdownVpnTracker.isEnabled()) { 3311 return false; 3312 } 3313 3314 // If the current VPN package is the same as the new one, this is a no-op 3315 final String oldPackage = getAlwaysOnVpnPackage(userId); 3316 if (TextUtils.equals(oldPackage, packageName)) { 3317 return true; 3318 } 3319 3320 synchronized (mVpns) { 3321 Vpn vpn = mVpns.get(userId); 3322 if (vpn == null) { 3323 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3324 return false; 3325 } 3326 if (!vpn.setAlwaysOnPackage(packageName)) { 3327 return false; 3328 } 3329 if (!updateAlwaysOnVpn(userId)) { 3330 vpn.setAlwaysOnPackage(null); 3331 return false; 3332 } 3333 } 3334 return true; 3335 } 3336 3337 @Override 3338 public String getAlwaysOnVpnPackage(int userId) { 3339 enforceConnectivityInternalPermission(); 3340 enforceCrossUserPermission(userId); 3341 3342 synchronized (mVpns) { 3343 Vpn vpn = mVpns.get(userId); 3344 if (vpn == null) { 3345 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3346 return null; 3347 } 3348 return vpn.getAlwaysOnPackage(); 3349 } 3350 } 3351 3352 @Override 3353 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3354 // TODO: Remove? Any reason to trigger a provisioning check? 3355 return -1; 3356 } 3357 3358 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3359 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3360 3361 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3362 if (DBG) { 3363 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3364 + " action=" + action); 3365 } 3366 Intent intent = new Intent(action); 3367 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3368 // Concatenate the range of types onto the range of NetIDs. 3369 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3370 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3371 networkType, null, pendingIntent, false); 3372 } 3373 3374 /** 3375 * Show or hide network provisioning notifications. 3376 * 3377 * We use notifications for two purposes: to notify that a network requires sign in 3378 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3379 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3380 * particular network we can display the notification type that was most recently requested. 3381 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3382 * might first display NO_INTERNET, and then when the captive portal check completes, display 3383 * SIGN_IN. 3384 * 3385 * @param id an identifier that uniquely identifies this notification. This must match 3386 * between show and hide calls. We use the NetID value but for legacy callers 3387 * we concatenate the range of types with the range of NetIDs. 3388 */ 3389 private void setProvNotificationVisibleIntent(boolean visible, int id, 3390 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3391 boolean highPriority) { 3392 if (DBG) { 3393 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3394 + " networkType=" + getNetworkTypeName(networkType) 3395 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3396 } 3397 3398 Resources r = Resources.getSystem(); 3399 NotificationManager notificationManager = (NotificationManager) mContext 3400 .getSystemService(Context.NOTIFICATION_SERVICE); 3401 3402 if (visible) { 3403 CharSequence title; 3404 CharSequence details; 3405 int icon; 3406 if (notifyType == NotificationType.NO_INTERNET && 3407 networkType == ConnectivityManager.TYPE_WIFI) { 3408 title = r.getString(R.string.wifi_no_internet, 0); 3409 details = r.getString(R.string.wifi_no_internet_detailed); 3410 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3411 } else if (notifyType == NotificationType.SIGN_IN) { 3412 switch (networkType) { 3413 case ConnectivityManager.TYPE_WIFI: 3414 title = r.getString(R.string.wifi_available_sign_in, 0); 3415 details = r.getString(R.string.network_available_sign_in_detailed, 3416 extraInfo); 3417 icon = R.drawable.stat_notify_wifi_in_range; 3418 break; 3419 case ConnectivityManager.TYPE_MOBILE: 3420 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3421 title = r.getString(R.string.network_available_sign_in, 0); 3422 // TODO: Change this to pull from NetworkInfo once a printable 3423 // name has been added to it 3424 details = mTelephonyManager.getNetworkOperatorName(); 3425 icon = R.drawable.stat_notify_rssi_in_range; 3426 break; 3427 default: 3428 title = r.getString(R.string.network_available_sign_in, 0); 3429 details = r.getString(R.string.network_available_sign_in_detailed, 3430 extraInfo); 3431 icon = R.drawable.stat_notify_rssi_in_range; 3432 break; 3433 } 3434 } else { 3435 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3436 + getNetworkTypeName(networkType)); 3437 return; 3438 } 3439 3440 Notification notification = new Notification.Builder(mContext) 3441 .setWhen(0) 3442 .setSmallIcon(icon) 3443 .setAutoCancel(true) 3444 .setTicker(title) 3445 .setColor(mContext.getColor( 3446 com.android.internal.R.color.system_notification_accent_color)) 3447 .setContentTitle(title) 3448 .setContentText(details) 3449 .setContentIntent(intent) 3450 .setLocalOnly(true) 3451 .setPriority(highPriority ? 3452 Notification.PRIORITY_HIGH : 3453 Notification.PRIORITY_DEFAULT) 3454 .setDefaults(highPriority ? Notification.DEFAULT_ALL : 0) 3455 .setOnlyAlertOnce(true) 3456 .build(); 3457 3458 try { 3459 notificationManager.notify(NOTIFICATION_ID, id, notification); 3460 } catch (NullPointerException npe) { 3461 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3462 npe.printStackTrace(); 3463 } 3464 } else { 3465 try { 3466 notificationManager.cancel(NOTIFICATION_ID, id); 3467 } catch (NullPointerException npe) { 3468 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3469 npe.printStackTrace(); 3470 } 3471 } 3472 } 3473 3474 /** Location to an updatable file listing carrier provisioning urls. 3475 * An example: 3476 * 3477 * <?xml version="1.0" encoding="utf-8"?> 3478 * <provisioningUrls> 3479 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3480 * </provisioningUrls> 3481 */ 3482 private static final String PROVISIONING_URL_PATH = 3483 "/data/misc/radio/provisioning_urls.xml"; 3484 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3485 3486 /** XML tag for root element. */ 3487 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3488 /** XML tag for individual url */ 3489 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3490 /** XML attribute for mcc */ 3491 private static final String ATTR_MCC = "mcc"; 3492 /** XML attribute for mnc */ 3493 private static final String ATTR_MNC = "mnc"; 3494 3495 private String getProvisioningUrlBaseFromFile() { 3496 FileReader fileReader = null; 3497 XmlPullParser parser = null; 3498 Configuration config = mContext.getResources().getConfiguration(); 3499 3500 try { 3501 fileReader = new FileReader(mProvisioningUrlFile); 3502 parser = Xml.newPullParser(); 3503 parser.setInput(fileReader); 3504 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3505 3506 while (true) { 3507 XmlUtils.nextElement(parser); 3508 3509 String element = parser.getName(); 3510 if (element == null) break; 3511 3512 if (element.equals(TAG_PROVISIONING_URL)) { 3513 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3514 try { 3515 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3516 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3517 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3518 parser.next(); 3519 if (parser.getEventType() == XmlPullParser.TEXT) { 3520 return parser.getText(); 3521 } 3522 } 3523 } 3524 } catch (NumberFormatException e) { 3525 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3526 } 3527 } 3528 } 3529 return null; 3530 } catch (FileNotFoundException e) { 3531 loge("Carrier Provisioning Urls file not found"); 3532 } catch (XmlPullParserException e) { 3533 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3534 } catch (IOException e) { 3535 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3536 } finally { 3537 if (fileReader != null) { 3538 try { 3539 fileReader.close(); 3540 } catch (IOException e) {} 3541 } 3542 } 3543 return null; 3544 } 3545 3546 @Override 3547 public String getMobileProvisioningUrl() { 3548 enforceConnectivityInternalPermission(); 3549 String url = getProvisioningUrlBaseFromFile(); 3550 if (TextUtils.isEmpty(url)) { 3551 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3552 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3553 } else { 3554 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3555 } 3556 // populate the iccid, imei and phone number in the provisioning url. 3557 if (!TextUtils.isEmpty(url)) { 3558 String phoneNumber = mTelephonyManager.getLine1Number(); 3559 if (TextUtils.isEmpty(phoneNumber)) { 3560 phoneNumber = "0000000000"; 3561 } 3562 url = String.format(url, 3563 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3564 mTelephonyManager.getDeviceId() /* IMEI */, 3565 phoneNumber /* Phone numer */); 3566 } 3567 3568 return url; 3569 } 3570 3571 @Override 3572 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3573 String action) { 3574 enforceConnectivityInternalPermission(); 3575 final long ident = Binder.clearCallingIdentity(); 3576 try { 3577 setProvNotificationVisible(visible, networkType, action); 3578 } finally { 3579 Binder.restoreCallingIdentity(ident); 3580 } 3581 } 3582 3583 @Override 3584 public void setAirplaneMode(boolean enable) { 3585 enforceConnectivityInternalPermission(); 3586 final long ident = Binder.clearCallingIdentity(); 3587 try { 3588 final ContentResolver cr = mContext.getContentResolver(); 3589 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3590 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3591 intent.putExtra("state", enable); 3592 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3593 } finally { 3594 Binder.restoreCallingIdentity(ident); 3595 } 3596 } 3597 3598 private void onUserStart(int userId) { 3599 synchronized(mVpns) { 3600 Vpn userVpn = mVpns.get(userId); 3601 if (userVpn != null) { 3602 loge("Starting user already has a VPN"); 3603 return; 3604 } 3605 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3606 mVpns.put(userId, userVpn); 3607 } 3608 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3609 updateLockdownVpn(); 3610 } else { 3611 updateAlwaysOnVpn(userId); 3612 } 3613 } 3614 3615 private void onUserStop(int userId) { 3616 synchronized(mVpns) { 3617 Vpn userVpn = mVpns.get(userId); 3618 if (userVpn == null) { 3619 loge("Stopping user has no VPN"); 3620 return; 3621 } 3622 mVpns.delete(userId); 3623 } 3624 } 3625 3626 private void onUserAdded(int userId) { 3627 synchronized(mVpns) { 3628 final int vpnsSize = mVpns.size(); 3629 for (int i = 0; i < vpnsSize; i++) { 3630 Vpn vpn = mVpns.valueAt(i); 3631 vpn.onUserAdded(userId); 3632 } 3633 } 3634 } 3635 3636 private void onUserRemoved(int userId) { 3637 synchronized(mVpns) { 3638 final int vpnsSize = mVpns.size(); 3639 for (int i = 0; i < vpnsSize; i++) { 3640 Vpn vpn = mVpns.valueAt(i); 3641 vpn.onUserRemoved(userId); 3642 } 3643 } 3644 } 3645 3646 private void onUserUnlocked(int userId) { 3647 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3648 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3649 updateLockdownVpn(); 3650 } else { 3651 updateAlwaysOnVpn(userId); 3652 } 3653 } 3654 3655 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3656 @Override 3657 public void onReceive(Context context, Intent intent) { 3658 final String action = intent.getAction(); 3659 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3660 if (userId == UserHandle.USER_NULL) return; 3661 3662 if (Intent.ACTION_USER_STARTING.equals(action)) { 3663 onUserStart(userId); 3664 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3665 onUserStop(userId); 3666 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3667 onUserAdded(userId); 3668 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3669 onUserRemoved(userId); 3670 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3671 onUserUnlocked(userId); 3672 } 3673 } 3674 }; 3675 3676 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3677 new HashMap<Messenger, NetworkFactoryInfo>(); 3678 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3679 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3680 3681 private static class NetworkFactoryInfo { 3682 public final String name; 3683 public final Messenger messenger; 3684 public final AsyncChannel asyncChannel; 3685 3686 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3687 this.name = name; 3688 this.messenger = messenger; 3689 this.asyncChannel = asyncChannel; 3690 } 3691 } 3692 3693 /** 3694 * A NetworkRequest as registered by an application can be one of three 3695 * types: 3696 * 3697 * - "listen", for which the framework will issue callbacks about any 3698 * and all networks that match the specified NetworkCapabilities, 3699 * 3700 * - "request", capable of causing a specific network to be created 3701 * first (e.g. a telephony DUN request), the framework will issue 3702 * callbacks about the single, highest scoring current network 3703 * (if any) that matches the specified NetworkCapabilities, or 3704 * 3705 * - "track the default network", a hybrid of the two designed such 3706 * that the framework will issue callbacks for the single, highest 3707 * scoring current network (if any) that matches the capabilities of 3708 * the default Internet request (mDefaultRequest), but which cannot 3709 * cause the framework to either create or retain the existence of 3710 * any specific network. 3711 * 3712 */ 3713 private static enum NetworkRequestType { 3714 LISTEN, 3715 TRACK_DEFAULT, 3716 REQUEST 3717 }; 3718 3719 /** 3720 * Tracks info about the requester. 3721 * Also used to notice when the calling process dies so we can self-expire 3722 */ 3723 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3724 final NetworkRequest request; 3725 final PendingIntent mPendingIntent; 3726 boolean mPendingIntentSent; 3727 private final IBinder mBinder; 3728 final int mPid; 3729 final int mUid; 3730 final Messenger messenger; 3731 private final NetworkRequestType mType; 3732 3733 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, NetworkRequestType type) { 3734 request = r; 3735 mPendingIntent = pi; 3736 messenger = null; 3737 mBinder = null; 3738 mPid = getCallingPid(); 3739 mUid = getCallingUid(); 3740 mType = type; 3741 } 3742 3743 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, NetworkRequestType type) { 3744 super(); 3745 messenger = m; 3746 request = r; 3747 mBinder = binder; 3748 mPid = getCallingPid(); 3749 mUid = getCallingUid(); 3750 mType = type; 3751 mPendingIntent = null; 3752 3753 try { 3754 mBinder.linkToDeath(this, 0); 3755 } catch (RemoteException e) { 3756 binderDied(); 3757 } 3758 } 3759 3760 private String typeString() { 3761 switch (mType) { 3762 case LISTEN: return "Listen"; 3763 case REQUEST: return "Request"; 3764 case TRACK_DEFAULT: return "Track default"; 3765 default: 3766 return "unknown type"; 3767 } 3768 } 3769 3770 void unlinkDeathRecipient() { 3771 if (mBinder != null) { 3772 mBinder.unlinkToDeath(this, 0); 3773 } 3774 } 3775 3776 public void binderDied() { 3777 log("ConnectivityService NetworkRequestInfo binderDied(" + 3778 request + ", " + mBinder + ")"); 3779 releaseNetworkRequest(request); 3780 } 3781 3782 /** 3783 * Returns true iff. the contained NetworkRequest is one that: 3784 * 3785 * - should be associated with at most one satisfying network 3786 * at a time; 3787 * 3788 * - should cause a network to be kept up if it is the only network 3789 * which can satisfy the NetworkReqeust. 3790 * 3791 * For full detail of how isRequest() is used for pairing Networks with 3792 * NetworkRequests read rematchNetworkAndRequests(). 3793 * 3794 * TODO: Rename to something more properly descriptive. 3795 */ 3796 public boolean isRequest() { 3797 return (mType == NetworkRequestType.TRACK_DEFAULT) || 3798 (mType == NetworkRequestType.REQUEST); 3799 } 3800 3801 public String toString() { 3802 return typeString() + 3803 " from uid/pid:" + mUid + "/" + mPid + 3804 " for " + request + 3805 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3806 } 3807 } 3808 3809 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3810 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3811 if (badCapability != null) { 3812 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3813 } 3814 } 3815 3816 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3817 final SortedSet<Integer> thresholds = new TreeSet(); 3818 synchronized (nai) { 3819 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3820 if (nri.request.networkCapabilities.hasSignalStrength() && 3821 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3822 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3823 } 3824 } 3825 } 3826 return new ArrayList<Integer>(thresholds); 3827 } 3828 3829 private void updateSignalStrengthThresholds( 3830 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3831 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3832 Bundle thresholds = new Bundle(); 3833 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3834 3835 // TODO: Switch to VDBG. 3836 if (DBG) { 3837 String detail; 3838 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3839 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3840 } else { 3841 detail = reason; 3842 } 3843 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3844 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3845 } 3846 3847 nai.asyncChannel.sendMessage( 3848 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3849 0, 0, thresholds); 3850 } 3851 3852 @Override 3853 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3854 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3855 final NetworkRequestType type = (networkCapabilities == null) 3856 ? NetworkRequestType.TRACK_DEFAULT 3857 : NetworkRequestType.REQUEST; 3858 // If the requested networkCapabilities is null, take them instead from 3859 // the default network request. This allows callers to keep track of 3860 // the system default network. 3861 if (type == NetworkRequestType.TRACK_DEFAULT) { 3862 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 3863 enforceAccessPermission(); 3864 } else { 3865 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3866 enforceNetworkRequestPermissions(networkCapabilities); 3867 } 3868 enforceMeteredApnPolicy(networkCapabilities); 3869 ensureRequestableCapabilities(networkCapabilities); 3870 3871 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3872 throw new IllegalArgumentException("Bad timeout specified"); 3873 } 3874 3875 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 3876 .equals(networkCapabilities.getNetworkSpecifier())) { 3877 throw new IllegalArgumentException("Invalid network specifier - must not be '" 3878 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 3879 } 3880 3881 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3882 nextNetworkRequestId()); 3883 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, type); 3884 if (DBG) log("requestNetwork for " + nri); 3885 3886 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3887 if (timeoutMs > 0) { 3888 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3889 nri), timeoutMs); 3890 } 3891 return networkRequest; 3892 } 3893 3894 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3895 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 3896 enforceConnectivityInternalPermission(); 3897 } else { 3898 enforceChangePermission(); 3899 } 3900 } 3901 3902 @Override 3903 public boolean requestBandwidthUpdate(Network network) { 3904 enforceAccessPermission(); 3905 NetworkAgentInfo nai = null; 3906 if (network == null) { 3907 return false; 3908 } 3909 synchronized (mNetworkForNetId) { 3910 nai = mNetworkForNetId.get(network.netId); 3911 } 3912 if (nai != null) { 3913 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3914 return true; 3915 } 3916 return false; 3917 } 3918 3919 3920 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3921 // if UID is restricted, don't allow them to bring up metered APNs 3922 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 3923 final int uidRules; 3924 final int uid = Binder.getCallingUid(); 3925 synchronized(mRulesLock) { 3926 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3927 } 3928 if (uidRules != RULE_ALLOW_ALL) { 3929 // we could silently fail or we can filter the available nets to only give 3930 // them those they have access to. Chose the more useful 3931 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 3932 } 3933 } 3934 } 3935 3936 @Override 3937 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3938 PendingIntent operation) { 3939 checkNotNull(operation, "PendingIntent cannot be null."); 3940 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3941 enforceNetworkRequestPermissions(networkCapabilities); 3942 enforceMeteredApnPolicy(networkCapabilities); 3943 ensureRequestableCapabilities(networkCapabilities); 3944 3945 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3946 nextNetworkRequestId()); 3947 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3948 NetworkRequestType.REQUEST); 3949 if (DBG) log("pendingRequest for " + nri); 3950 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3951 nri)); 3952 return networkRequest; 3953 } 3954 3955 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3956 mHandler.sendMessageDelayed( 3957 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3958 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3959 } 3960 3961 @Override 3962 public void releasePendingNetworkRequest(PendingIntent operation) { 3963 checkNotNull(operation, "PendingIntent cannot be null."); 3964 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3965 getCallingUid(), 0, operation)); 3966 } 3967 3968 // In order to implement the compatibility measure for pre-M apps that call 3969 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 3970 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 3971 // This ensures it has permission to do so. 3972 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 3973 if (nc == null) { 3974 return false; 3975 } 3976 int[] transportTypes = nc.getTransportTypes(); 3977 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 3978 return false; 3979 } 3980 try { 3981 mContext.enforceCallingOrSelfPermission( 3982 android.Manifest.permission.ACCESS_WIFI_STATE, 3983 "ConnectivityService"); 3984 } catch (SecurityException e) { 3985 return false; 3986 } 3987 return true; 3988 } 3989 3990 @Override 3991 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 3992 Messenger messenger, IBinder binder) { 3993 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3994 enforceAccessPermission(); 3995 } 3996 3997 NetworkRequest networkRequest = new NetworkRequest( 3998 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3999 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 4000 NetworkRequestType.LISTEN); 4001 if (DBG) log("listenForNetwork for " + nri); 4002 4003 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4004 return networkRequest; 4005 } 4006 4007 @Override 4008 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4009 PendingIntent operation) { 4010 checkNotNull(operation, "PendingIntent cannot be null."); 4011 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4012 enforceAccessPermission(); 4013 } 4014 4015 NetworkRequest networkRequest = new NetworkRequest( 4016 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 4017 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 4018 NetworkRequestType.LISTEN); 4019 if (DBG) log("pendingListenForNetwork for " + nri); 4020 4021 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4022 } 4023 4024 @Override 4025 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4026 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 4027 0, networkRequest)); 4028 } 4029 4030 @Override 4031 public void registerNetworkFactory(Messenger messenger, String name) { 4032 enforceConnectivityInternalPermission(); 4033 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4034 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4035 } 4036 4037 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4038 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4039 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4040 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4041 } 4042 4043 @Override 4044 public void unregisterNetworkFactory(Messenger messenger) { 4045 enforceConnectivityInternalPermission(); 4046 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4047 } 4048 4049 private void handleUnregisterNetworkFactory(Messenger messenger) { 4050 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4051 if (nfi == null) { 4052 loge("Failed to find Messenger in unregisterNetworkFactory"); 4053 return; 4054 } 4055 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4056 } 4057 4058 /** 4059 * NetworkAgentInfo supporting a request by requestId. 4060 * These have already been vetted (their Capabilities satisfy the request) 4061 * and the are the highest scored network available. 4062 * the are keyed off the Requests requestId. 4063 */ 4064 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4065 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4066 new SparseArray<NetworkAgentInfo>(); 4067 4068 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4069 @GuardedBy("mNetworkForNetId") 4070 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4071 new SparseArray<NetworkAgentInfo>(); 4072 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4073 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4074 // there may not be a strict 1:1 correlation between the two. 4075 @GuardedBy("mNetworkForNetId") 4076 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4077 4078 // NetworkAgentInfo keyed off its connecting messenger 4079 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4080 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4081 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4082 new HashMap<Messenger, NetworkAgentInfo>(); 4083 4084 @GuardedBy("mBlockedAppUids") 4085 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4086 4087 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4088 private final NetworkRequest mDefaultRequest; 4089 4090 // Request used to optionally keep mobile data active even when higher 4091 // priority networks like Wi-Fi are active. 4092 private final NetworkRequest mDefaultMobileDataRequest; 4093 4094 private NetworkAgentInfo getDefaultNetwork() { 4095 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4096 } 4097 4098 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4099 return nai == getDefaultNetwork(); 4100 } 4101 4102 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4103 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4104 int currentScore, NetworkMisc networkMisc) { 4105 enforceConnectivityInternalPermission(); 4106 4107 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4108 // satisfies mDefaultRequest. 4109 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4110 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4111 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4112 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4113 synchronized (this) { 4114 nai.networkMonitor.systemReady = mSystemReady; 4115 } 4116 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network); 4117 if (DBG) log("registerNetworkAgent " + nai); 4118 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4119 return nai.network.netId; 4120 } 4121 4122 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4123 if (VDBG) log("Got NetworkAgent Messenger"); 4124 mNetworkAgentInfos.put(na.messenger, na); 4125 synchronized (mNetworkForNetId) { 4126 mNetworkForNetId.put(na.network.netId, na); 4127 } 4128 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4129 NetworkInfo networkInfo = na.networkInfo; 4130 na.networkInfo = null; 4131 updateNetworkInfo(na, networkInfo); 4132 } 4133 4134 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4135 LinkProperties newLp = networkAgent.linkProperties; 4136 int netId = networkAgent.network.netId; 4137 4138 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4139 // we do anything else, make sure its LinkProperties are accurate. 4140 if (networkAgent.clatd != null) { 4141 networkAgent.clatd.fixupLinkProperties(oldLp); 4142 } 4143 4144 updateInterfaces(newLp, oldLp, netId); 4145 updateMtu(newLp, oldLp); 4146 // TODO - figure out what to do for clat 4147// for (LinkProperties lp : newLp.getStackedLinks()) { 4148// updateMtu(lp, null); 4149// } 4150 updateTcpBufferSizes(networkAgent); 4151 4152 // TODO: deprecate and remove mDefaultDns when we can do so safely. See http://b/18327075 4153 // In L, we used it only when the network had Internet access but provided no DNS servers. 4154 // For now, just disable it, and if disabling it doesn't break things, remove it. 4155 // final boolean useDefaultDns = networkAgent.networkCapabilities.hasCapability( 4156 // NET_CAPABILITY_INTERNET); 4157 final boolean useDefaultDns = false; 4158 final boolean flushDns = updateRoutes(newLp, oldLp, netId); 4159 updateDnses(newLp, oldLp, netId, flushDns, useDefaultDns); 4160 4161 updateClat(newLp, oldLp, networkAgent); 4162 if (isDefaultNetwork(networkAgent)) { 4163 handleApplyDefaultProxy(newLp.getHttpProxy()); 4164 } else { 4165 updateProxy(newLp, oldLp, networkAgent); 4166 } 4167 // TODO - move this check to cover the whole function 4168 if (!Objects.equals(newLp, oldLp)) { 4169 notifyIfacesChangedForNetworkStats(); 4170 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4171 } 4172 4173 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4174 } 4175 4176 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4177 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4178 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4179 4180 if (!wasRunningClat && shouldRunClat) { 4181 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4182 nai.clatd.start(); 4183 } else if (wasRunningClat && !shouldRunClat) { 4184 nai.clatd.stop(); 4185 } 4186 } 4187 4188 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4189 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4190 if (oldLp != null) { 4191 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4192 } else if (newLp != null) { 4193 interfaceDiff.added = newLp.getAllInterfaceNames(); 4194 } 4195 for (String iface : interfaceDiff.added) { 4196 try { 4197 if (DBG) log("Adding iface " + iface + " to network " + netId); 4198 mNetd.addInterfaceToNetwork(iface, netId); 4199 } catch (Exception e) { 4200 loge("Exception adding interface: " + e); 4201 } 4202 } 4203 for (String iface : interfaceDiff.removed) { 4204 try { 4205 if (DBG) log("Removing iface " + iface + " from network " + netId); 4206 mNetd.removeInterfaceFromNetwork(iface, netId); 4207 } catch (Exception e) { 4208 loge("Exception removing interface: " + e); 4209 } 4210 } 4211 } 4212 4213 /** 4214 * Have netd update routes from oldLp to newLp. 4215 * @return true if routes changed between oldLp and newLp 4216 */ 4217 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4218 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4219 if (oldLp != null) { 4220 routeDiff = oldLp.compareAllRoutes(newLp); 4221 } else if (newLp != null) { 4222 routeDiff.added = newLp.getAllRoutes(); 4223 } 4224 4225 // add routes before removing old in case it helps with continuous connectivity 4226 4227 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4228 for (RouteInfo route : routeDiff.added) { 4229 if (route.hasGateway()) continue; 4230 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4231 try { 4232 mNetd.addRoute(netId, route); 4233 } catch (Exception e) { 4234 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4235 loge("Exception in addRoute for non-gateway: " + e); 4236 } 4237 } 4238 } 4239 for (RouteInfo route : routeDiff.added) { 4240 if (route.hasGateway() == false) continue; 4241 if (DBG) log("Adding Route [" + route + "] to network " + netId); 4242 try { 4243 mNetd.addRoute(netId, route); 4244 } catch (Exception e) { 4245 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4246 loge("Exception in addRoute for gateway: " + e); 4247 } 4248 } 4249 } 4250 4251 for (RouteInfo route : routeDiff.removed) { 4252 if (DBG) log("Removing Route [" + route + "] from network " + netId); 4253 try { 4254 mNetd.removeRoute(netId, route); 4255 } catch (Exception e) { 4256 loge("Exception in removeRoute: " + e); 4257 } 4258 } 4259 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4260 } 4261 4262 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId, 4263 boolean flush, boolean useDefaultDns) { 4264 if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) { 4265 Collection<InetAddress> dnses = newLp.getDnsServers(); 4266 if (dnses.size() == 0 && mDefaultDns != null && useDefaultDns) { 4267 dnses = new ArrayList(); 4268 dnses.add(mDefaultDns); 4269 if (DBG) { 4270 loge("no dns provided for netId " + netId + ", so using defaults"); 4271 } 4272 } 4273 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 4274 try { 4275 mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses), 4276 newLp.getDomains()); 4277 } catch (Exception e) { 4278 loge("Exception in setDnsServersForNetwork: " + e); 4279 } 4280 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4281 if (defaultNai != null && defaultNai.network.netId == netId) { 4282 setDefaultDnsSystemProperties(dnses); 4283 } 4284 flushVmDnsCache(); 4285 } else if (flush) { 4286 try { 4287 mNetd.flushNetworkDnsCache(netId); 4288 } catch (Exception e) { 4289 loge("Exception in flushNetworkDnsCache: " + e); 4290 } 4291 flushVmDnsCache(); 4292 } 4293 } 4294 4295 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4296 int last = 0; 4297 for (InetAddress dns : dnses) { 4298 ++last; 4299 String key = "net.dns" + last; 4300 String value = dns.getHostAddress(); 4301 SystemProperties.set(key, value); 4302 } 4303 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4304 String key = "net.dns" + i; 4305 SystemProperties.set(key, ""); 4306 } 4307 mNumDnsEntries = last; 4308 } 4309 4310 /** 4311 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4312 * augmented with any stateful capabilities implied from {@code networkAgent} 4313 * (e.g., validated status and captive portal status). 4314 * 4315 * @param nai the network having its capabilities updated. 4316 * @param networkCapabilities the new network capabilities. 4317 */ 4318 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4319 // Don't modify caller's NetworkCapabilities. 4320 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4321 if (nai.lastValidated) { 4322 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4323 } else { 4324 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4325 } 4326 if (nai.lastCaptivePortalDetected) { 4327 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4328 } else { 4329 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4330 } 4331 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4332 final int oldScore = nai.getCurrentScore(); 4333 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4334 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4335 try { 4336 mNetd.setNetworkPermission(nai.network.netId, 4337 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4338 null : NetworkManagementService.PERMISSION_SYSTEM); 4339 } catch (RemoteException e) { 4340 loge("Exception in setNetworkPermission: " + e); 4341 } 4342 } 4343 synchronized (nai) { 4344 nai.networkCapabilities = networkCapabilities; 4345 } 4346 rematchAllNetworksAndRequests(nai, oldScore); 4347 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4348 } 4349 } 4350 4351 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4352 for (int i = 0; i < nai.networkRequests.size(); i++) { 4353 NetworkRequest nr = nai.networkRequests.valueAt(i); 4354 // Don't send listening requests to factories. b/17393458 4355 if (!isRequest(nr)) continue; 4356 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4357 } 4358 } 4359 4360 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4361 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4362 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4363 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4364 networkRequest); 4365 } 4366 } 4367 4368 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4369 int notificationType) { 4370 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4371 Intent intent = new Intent(); 4372 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4373 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4374 nri.mPendingIntentSent = true; 4375 sendIntent(nri.mPendingIntent, intent); 4376 } 4377 // else not handled 4378 } 4379 4380 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4381 mPendingIntentWakeLock.acquire(); 4382 try { 4383 if (DBG) log("Sending " + pendingIntent); 4384 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4385 } catch (PendingIntent.CanceledException e) { 4386 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4387 mPendingIntentWakeLock.release(); 4388 releasePendingNetworkRequest(pendingIntent); 4389 } 4390 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4391 } 4392 4393 @Override 4394 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4395 String resultData, Bundle resultExtras) { 4396 if (DBG) log("Finished sending " + pendingIntent); 4397 mPendingIntentWakeLock.release(); 4398 // Release with a delay so the receiving client has an opportunity to put in its 4399 // own request. 4400 releasePendingNetworkRequestWithDelay(pendingIntent); 4401 } 4402 4403 private void callCallbackForRequest(NetworkRequestInfo nri, 4404 NetworkAgentInfo networkAgent, int notificationType) { 4405 if (nri.messenger == null) return; // Default request has no msgr 4406 Bundle bundle = new Bundle(); 4407 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4408 new NetworkRequest(nri.request)); 4409 Message msg = Message.obtain(); 4410 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4411 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4412 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4413 } 4414 switch (notificationType) { 4415 case ConnectivityManager.CALLBACK_LOSING: { 4416 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4417 break; 4418 } 4419 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4420 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4421 new NetworkCapabilities(networkAgent.networkCapabilities)); 4422 break; 4423 } 4424 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4425 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4426 new LinkProperties(networkAgent.linkProperties)); 4427 break; 4428 } 4429 } 4430 msg.what = notificationType; 4431 msg.setData(bundle); 4432 try { 4433 if (VDBG) { 4434 log("sending notification " + notifyTypeToName(notificationType) + 4435 " for " + nri.request); 4436 } 4437 nri.messenger.send(msg); 4438 } catch (RemoteException e) { 4439 // may occur naturally in the race of binder death. 4440 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4441 } 4442 } 4443 4444 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4445 for (int i = 0; i < nai.networkRequests.size(); i++) { 4446 NetworkRequest nr = nai.networkRequests.valueAt(i); 4447 // Ignore listening requests. 4448 if (!isRequest(nr)) continue; 4449 loge("Dead network still had at least " + nr); 4450 break; 4451 } 4452 nai.asyncChannel.disconnect(); 4453 } 4454 4455 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4456 if (oldNetwork == null) { 4457 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4458 return; 4459 } 4460 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4461 teardownUnneededNetwork(oldNetwork); 4462 } 4463 4464 private void makeDefault(NetworkAgentInfo newNetwork) { 4465 if (DBG) log("Switching to new default network: " + newNetwork); 4466 ConnectivityServiceChangeEvent.logEvent(newNetwork.network.netId); 4467 setupDataActivityTracking(newNetwork); 4468 try { 4469 mNetd.setDefaultNetId(newNetwork.network.netId); 4470 } catch (Exception e) { 4471 loge("Exception setting default network :" + e); 4472 } 4473 notifyLockdownVpn(newNetwork); 4474 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4475 updateTcpBufferSizes(newNetwork); 4476 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4477 } 4478 4479 // Handles a network appearing or improving its score. 4480 // 4481 // - Evaluates all current NetworkRequests that can be 4482 // satisfied by newNetwork, and reassigns to newNetwork 4483 // any such requests for which newNetwork is the best. 4484 // 4485 // - Lingers any validated Networks that as a result are no longer 4486 // needed. A network is needed if it is the best network for 4487 // one or more NetworkRequests, or if it is a VPN. 4488 // 4489 // - Tears down newNetwork if it just became validated 4490 // but turns out to be unneeded. 4491 // 4492 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4493 // networks that have no chance (i.e. even if validated) 4494 // of becoming the highest scoring network. 4495 // 4496 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4497 // it does not remove NetworkRequests that other Networks could better satisfy. 4498 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4499 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4500 // as it performs better by a factor of the number of Networks. 4501 // 4502 // @param newNetwork is the network to be matched against NetworkRequests. 4503 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4504 // performed to tear down unvalidated networks that have no chance (i.e. even if 4505 // validated) of becoming the highest scoring network. 4506 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4507 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4508 if (!newNetwork.created) return; 4509 boolean keep = newNetwork.isVPN(); 4510 boolean isNewDefault = false; 4511 NetworkAgentInfo oldDefaultNetwork = null; 4512 if (VDBG) log("rematching " + newNetwork.name()); 4513 // Find and migrate to this Network any NetworkRequests for 4514 // which this network is now the best. 4515 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4516 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4517 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4518 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4519 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4520 final boolean satisfies = newNetwork.satisfies(nri.request); 4521 if (newNetwork == currentNetwork && satisfies) { 4522 if (VDBG) { 4523 log("Network " + newNetwork.name() + " was already satisfying" + 4524 " request " + nri.request.requestId + ". No change."); 4525 } 4526 keep = true; 4527 continue; 4528 } 4529 4530 // check if it satisfies the NetworkCapabilities 4531 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4532 if (satisfies) { 4533 if (!nri.isRequest()) { 4534 // This is not a request, it's a callback listener. 4535 // Add it to newNetwork regardless of score. 4536 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4537 continue; 4538 } 4539 4540 // next check if it's better than any current network we're using for 4541 // this request 4542 if (VDBG) { 4543 log("currentScore = " + 4544 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4545 ", newScore = " + newNetwork.getCurrentScore()); 4546 } 4547 if (currentNetwork == null || 4548 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4549 if (DBG) log("rematch for " + newNetwork.name()); 4550 if (currentNetwork != null) { 4551 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4552 currentNetwork.networkRequests.remove(nri.request.requestId); 4553 currentNetwork.networkLingered.add(nri.request); 4554 affectedNetworks.add(currentNetwork); 4555 } else { 4556 if (DBG) log(" accepting network in place of null"); 4557 } 4558 unlinger(newNetwork); 4559 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4560 if (!newNetwork.addRequest(nri.request)) { 4561 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4562 } 4563 addedRequests.add(nri); 4564 keep = true; 4565 // Tell NetworkFactories about the new score, so they can stop 4566 // trying to connect if they know they cannot match it. 4567 // TODO - this could get expensive if we have alot of requests for this 4568 // network. Think about if there is a way to reduce this. Push 4569 // netid->request mapping to each factory? 4570 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4571 if (mDefaultRequest.requestId == nri.request.requestId) { 4572 isNewDefault = true; 4573 oldDefaultNetwork = currentNetwork; 4574 } 4575 } 4576 } else if (newNetwork.networkRequests.get(nri.request.requestId) != null) { 4577 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4578 // mark it as no longer satisfying "nri". Because networks are processed by 4579 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4580 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4581 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4582 // This means this code doesn't have to handle the case where "currentNetwork" no 4583 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4584 if (DBG) { 4585 log("Network " + newNetwork.name() + " stopped satisfying" + 4586 " request " + nri.request.requestId); 4587 } 4588 newNetwork.networkRequests.remove(nri.request.requestId); 4589 if (currentNetwork == newNetwork) { 4590 mNetworkForRequestId.remove(nri.request.requestId); 4591 sendUpdatedScoreToFactories(nri.request, 0); 4592 } else { 4593 if (nri.isRequest()) { 4594 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4595 newNetwork.name() + 4596 " without updating mNetworkForRequestId or factories!"); 4597 } 4598 } 4599 // TODO: technically, sending CALLBACK_LOST here is 4600 // incorrect if nri is a request (not a listen) and there 4601 // is a replacement network currently connected that can 4602 // satisfy it. However, the only capability that can both 4603 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4604 // so this code is only incorrect for a network that loses 4605 // the TRUSTED capability, which is a rare case. 4606 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST); 4607 } 4608 } 4609 // Linger any networks that are no longer needed. 4610 for (NetworkAgentInfo nai : affectedNetworks) { 4611 if (nai.lingering) { 4612 // Already lingered. Nothing to do. This can only happen if "nai" is in 4613 // "affectedNetworks" twice. The reasoning being that to get added to 4614 // "affectedNetworks", "nai" must have been satisfying a NetworkRequest 4615 // (i.e. not lingered) so it could have only been lingered by this loop. 4616 // unneeded(nai) will be false and we'll call unlinger() below which would 4617 // be bad, so handle it here. 4618 } else if (unneeded(nai)) { 4619 linger(nai); 4620 } else { 4621 // Clear nai.networkLingered we might have added above. 4622 unlinger(nai); 4623 } 4624 } 4625 if (isNewDefault) { 4626 // Notify system services that this network is up. 4627 makeDefault(newNetwork); 4628 synchronized (ConnectivityService.this) { 4629 // have a new default network, release the transition wakelock in 4630 // a second if it's held. The second pause is to allow apps 4631 // to reconnect over the new network 4632 if (mNetTransitionWakeLock.isHeld()) { 4633 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4634 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4635 mNetTransitionWakeLockSerialNumber, 0), 4636 1000); 4637 } 4638 } 4639 } 4640 4641 // do this after the default net is switched, but 4642 // before LegacyTypeTracker sends legacy broadcasts 4643 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4644 4645 if (isNewDefault) { 4646 // Maintain the illusion: since the legacy API only 4647 // understands one network at a time, we must pretend 4648 // that the current default network disconnected before 4649 // the new one connected. 4650 if (oldDefaultNetwork != null) { 4651 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4652 oldDefaultNetwork, true); 4653 } 4654 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4655 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4656 notifyLockdownVpn(newNetwork); 4657 } 4658 4659 if (keep) { 4660 // Notify battery stats service about this network, both the normal 4661 // interface and any stacked links. 4662 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4663 try { 4664 final IBatteryStats bs = BatteryStatsService.getService(); 4665 final int type = newNetwork.networkInfo.getType(); 4666 4667 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4668 bs.noteNetworkInterfaceType(baseIface, type); 4669 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4670 final String stackedIface = stacked.getInterfaceName(); 4671 bs.noteNetworkInterfaceType(stackedIface, type); 4672 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4673 } 4674 } catch (RemoteException ignored) { 4675 } 4676 4677 // This has to happen after the notifyNetworkCallbacks as that tickles each 4678 // ConnectivityManager instance so that legacy requests correctly bind dns 4679 // requests to this network. The legacy users are listening for this bcast 4680 // and will generally do a dns request so they can ensureRouteToHost and if 4681 // they do that before the callbacks happen they'll use the default network. 4682 // 4683 // TODO: Is there still a race here? We send the broadcast 4684 // after sending the callback, but if the app can receive the 4685 // broadcast before the callback, it might still break. 4686 // 4687 // This *does* introduce a race where if the user uses the new api 4688 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4689 // they may get old info. Reverse this after the old startUsing api is removed. 4690 // This is on top of the multiple intent sequencing referenced in the todo above. 4691 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4692 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4693 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4694 // legacy type tracker filters out repeat adds 4695 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4696 } 4697 } 4698 4699 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4700 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4701 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4702 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4703 if (newNetwork.isVPN()) { 4704 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4705 } 4706 } 4707 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4708 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4709 if (unneeded(nai)) { 4710 if (DBG) log("Reaping " + nai.name()); 4711 teardownUnneededNetwork(nai); 4712 } 4713 } 4714 } 4715 } 4716 4717 /** 4718 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4719 * being disconnected. 4720 * @param changed If only one Network's score or capabilities have been modified since the last 4721 * time this function was called, pass this Network in this argument, otherwise pass 4722 * null. 4723 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4724 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4725 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4726 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4727 * network's score. 4728 */ 4729 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4730 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4731 // to avoid the slowness. It is not simply enough to process just "changed", for 4732 // example in the case where "changed"'s score decreases and another network should begin 4733 // satifying a NetworkRequest that "changed" currently satisfies. 4734 4735 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4736 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4737 // rematchNetworkAndRequests() handles. 4738 if (changed != null && oldScore < changed.getCurrentScore()) { 4739 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP); 4740 } else { 4741 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4742 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4743 // Rematch higher scoring networks first to prevent requests first matching a lower 4744 // scoring network and then a higher scoring network, which could produce multiple 4745 // callbacks and inadvertently unlinger networks. 4746 Arrays.sort(nais); 4747 for (NetworkAgentInfo nai : nais) { 4748 rematchNetworkAndRequests(nai, 4749 // Only reap the last time through the loop. Reaping before all rematching 4750 // is complete could incorrectly teardown a network that hasn't yet been 4751 // rematched. 4752 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4753 : ReapUnvalidatedNetworks.REAP); 4754 } 4755 } 4756 } 4757 4758 private void updateInetCondition(NetworkAgentInfo nai) { 4759 // Don't bother updating until we've graduated to validated at least once. 4760 if (!nai.everValidated) return; 4761 // For now only update icons for default connection. 4762 // TODO: Update WiFi and cellular icons separately. b/17237507 4763 if (!isDefaultNetwork(nai)) return; 4764 4765 int newInetCondition = nai.lastValidated ? 100 : 0; 4766 // Don't repeat publish. 4767 if (newInetCondition == mDefaultInetConditionPublished) return; 4768 4769 mDefaultInetConditionPublished = newInetCondition; 4770 sendInetConditionBroadcast(nai.networkInfo); 4771 } 4772 4773 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4774 if (mLockdownTracker != null) { 4775 if (nai != null && nai.isVPN()) { 4776 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4777 } else { 4778 mLockdownTracker.onNetworkInfoChanged(); 4779 } 4780 } 4781 } 4782 4783 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4784 NetworkInfo.State state = newInfo.getState(); 4785 NetworkInfo oldInfo = null; 4786 final int oldScore = networkAgent.getCurrentScore(); 4787 synchronized (networkAgent) { 4788 oldInfo = networkAgent.networkInfo; 4789 networkAgent.networkInfo = newInfo; 4790 } 4791 notifyLockdownVpn(networkAgent); 4792 4793 if (oldInfo != null && oldInfo.getState() == state) { 4794 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 4795 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 4796 notifyIfacesChangedForNetworkStats(); 4797 } else if (VDBG) log("ignoring duplicate network state non-change"); 4798 // In either case, no further work should be needed. 4799 return; 4800 } 4801 if (DBG) { 4802 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4803 (oldInfo == null ? "null" : oldInfo.getState()) + 4804 " to " + state); 4805 } 4806 4807 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4808 try { 4809 // This should never fail. Specifying an already in use NetID will cause failure. 4810 if (networkAgent.isVPN()) { 4811 mNetd.createVirtualNetwork(networkAgent.network.netId, 4812 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4813 (networkAgent.networkMisc == null || 4814 !networkAgent.networkMisc.allowBypass)); 4815 } else { 4816 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4817 networkAgent.networkCapabilities.hasCapability( 4818 NET_CAPABILITY_NOT_RESTRICTED) ? 4819 null : NetworkManagementService.PERMISSION_SYSTEM); 4820 } 4821 } catch (Exception e) { 4822 loge("Error creating network " + networkAgent.network.netId + ": " 4823 + e.getMessage()); 4824 return; 4825 } 4826 networkAgent.created = true; 4827 updateLinkProperties(networkAgent, null); 4828 notifyIfacesChangedForNetworkStats(); 4829 4830 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4831 scheduleUnvalidatedPrompt(networkAgent); 4832 4833 if (networkAgent.isVPN()) { 4834 // Temporarily disable the default proxy (not global). 4835 synchronized (mProxyLock) { 4836 if (!mDefaultProxyDisabled) { 4837 mDefaultProxyDisabled = true; 4838 if (mGlobalProxy == null && mDefaultProxy != null) { 4839 sendProxyBroadcast(null); 4840 } 4841 } 4842 } 4843 // TODO: support proxy per network. 4844 } 4845 4846 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 4847 // be communicated to a particular NetworkAgent depends only on the network's immutable, 4848 // capabilities, so it only needs to be done once on initial connect, not every time the 4849 // network's capabilities change. Note that we do this before rematching the network, 4850 // so we could decide to tear it down immediately afterwards. That's fine though - on 4851 // disconnection NetworkAgents should stop any signal strength monitoring they have been 4852 // doing. 4853 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 4854 4855 // Consider network even though it is not yet validated. 4856 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP); 4857 4858 // This has to happen after matching the requests, because callbacks are just requests. 4859 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4860 } else if (state == NetworkInfo.State.DISCONNECTED) { 4861 networkAgent.asyncChannel.disconnect(); 4862 if (networkAgent.isVPN()) { 4863 synchronized (mProxyLock) { 4864 if (mDefaultProxyDisabled) { 4865 mDefaultProxyDisabled = false; 4866 if (mGlobalProxy == null && mDefaultProxy != null) { 4867 sendProxyBroadcast(mDefaultProxy); 4868 } 4869 } 4870 } 4871 } 4872 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 4873 state == NetworkInfo.State.SUSPENDED) { 4874 // going into or coming out of SUSPEND: rescore and notify 4875 if (networkAgent.getCurrentScore() != oldScore) { 4876 rematchAllNetworksAndRequests(networkAgent, oldScore); 4877 } 4878 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 4879 ConnectivityManager.CALLBACK_SUSPENDED : 4880 ConnectivityManager.CALLBACK_RESUMED)); 4881 mLegacyTypeTracker.update(networkAgent); 4882 } 4883 } 4884 4885 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4886 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4887 if (score < 0) { 4888 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4889 "). Bumping score to min of 0"); 4890 score = 0; 4891 } 4892 4893 final int oldScore = nai.getCurrentScore(); 4894 nai.setCurrentScore(score); 4895 4896 rematchAllNetworksAndRequests(nai, oldScore); 4897 4898 sendUpdatedScoreToFactories(nai); 4899 } 4900 4901 // notify only this one new request of the current state 4902 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4903 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4904 // TODO - read state from monitor to decide what to send. 4905// if (nai.networkMonitor.isLingering()) { 4906// notifyType = NetworkCallbacks.LOSING; 4907// } else if (nai.networkMonitor.isEvaluating()) { 4908// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4909// } 4910 if (nri.mPendingIntent == null) { 4911 callCallbackForRequest(nri, nai, notifyType); 4912 } else { 4913 sendPendingIntentForRequest(nri, nai, notifyType); 4914 } 4915 } 4916 4917 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 4918 // The NetworkInfo we actually send out has no bearing on the real 4919 // state of affairs. For example, if the default connection is mobile, 4920 // and a request for HIPRI has just gone away, we need to pretend that 4921 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4922 // the state to DISCONNECTED, even though the network is of type MOBILE 4923 // and is still connected. 4924 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4925 info.setType(type); 4926 if (state != DetailedState.DISCONNECTED) { 4927 info.setDetailedState(state, null, info.getExtraInfo()); 4928 sendConnectedBroadcast(info); 4929 } else { 4930 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 4931 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4932 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4933 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4934 if (info.isFailover()) { 4935 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4936 nai.networkInfo.setFailover(false); 4937 } 4938 if (info.getReason() != null) { 4939 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4940 } 4941 if (info.getExtraInfo() != null) { 4942 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4943 } 4944 NetworkAgentInfo newDefaultAgent = null; 4945 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4946 newDefaultAgent = getDefaultNetwork(); 4947 if (newDefaultAgent != null) { 4948 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4949 newDefaultAgent.networkInfo); 4950 } else { 4951 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4952 } 4953 } 4954 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4955 mDefaultInetConditionPublished); 4956 sendStickyBroadcast(intent); 4957 if (newDefaultAgent != null) { 4958 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4959 } 4960 } 4961 } 4962 4963 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4964 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4965 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4966 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4967 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4968 if (VDBG) log(" sending notification for " + nr); 4969 if (nri.mPendingIntent == null) { 4970 callCallbackForRequest(nri, networkAgent, notifyType); 4971 } else { 4972 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4973 } 4974 } 4975 } 4976 4977 private String notifyTypeToName(int notifyType) { 4978 switch (notifyType) { 4979 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4980 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4981 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4982 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4983 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4984 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4985 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4986 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4987 } 4988 return "UNKNOWN"; 4989 } 4990 4991 /** 4992 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 4993 * properties tracked by NetworkStatsService on an active iface has changed. 4994 */ 4995 private void notifyIfacesChangedForNetworkStats() { 4996 try { 4997 mStatsService.forceUpdateIfaces(); 4998 } catch (Exception ignored) { 4999 } 5000 } 5001 5002 @Override 5003 public boolean addVpnAddress(String address, int prefixLength) { 5004 throwIfLockdownEnabled(); 5005 int user = UserHandle.getUserId(Binder.getCallingUid()); 5006 synchronized (mVpns) { 5007 return mVpns.get(user).addAddress(address, prefixLength); 5008 } 5009 } 5010 5011 @Override 5012 public boolean removeVpnAddress(String address, int prefixLength) { 5013 throwIfLockdownEnabled(); 5014 int user = UserHandle.getUserId(Binder.getCallingUid()); 5015 synchronized (mVpns) { 5016 return mVpns.get(user).removeAddress(address, prefixLength); 5017 } 5018 } 5019 5020 @Override 5021 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5022 throwIfLockdownEnabled(); 5023 int user = UserHandle.getUserId(Binder.getCallingUid()); 5024 boolean success; 5025 synchronized (mVpns) { 5026 success = mVpns.get(user).setUnderlyingNetworks(networks); 5027 } 5028 if (success) { 5029 notifyIfacesChangedForNetworkStats(); 5030 } 5031 return success; 5032 } 5033 5034 @Override 5035 public String getCaptivePortalServerUrl() { 5036 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5037 } 5038 5039 @Override 5040 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5041 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5042 enforceKeepalivePermission(); 5043 mKeepaliveTracker.startNattKeepalive( 5044 getNetworkAgentInfoForNetwork(network), 5045 intervalSeconds, messenger, binder, 5046 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5047 } 5048 5049 @Override 5050 public void stopKeepalive(Network network, int slot) { 5051 mHandler.sendMessage(mHandler.obtainMessage( 5052 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5053 } 5054 5055 @Override 5056 public void factoryReset() { 5057 enforceConnectivityInternalPermission(); 5058 5059 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5060 return; 5061 } 5062 5063 final int userId = UserHandle.getCallingUserId(); 5064 5065 // Turn airplane mode off 5066 setAirplaneMode(false); 5067 5068 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5069 // Untether 5070 for (String tether : getTetheredIfaces()) { 5071 untether(tether); 5072 } 5073 } 5074 5075 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5076 // Turn VPN off 5077 VpnConfig vpnConfig = getVpnConfig(userId); 5078 if (vpnConfig != null) { 5079 if (vpnConfig.legacy) { 5080 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5081 } else { 5082 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5083 // in the future without user intervention. 5084 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5085 5086 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN, userId); 5087 } 5088 } 5089 } 5090 } 5091 5092 @VisibleForTesting 5093 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5094 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5095 return new NetworkMonitor(context, handler, nai, defaultRequest); 5096 } 5097} 5098