ConnectivityService.java revision 147cf4b8c4345f2d086251313583888356317d2d
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.MANAGE_NETWORK_POLICY; 20import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 21import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 22import static android.net.ConnectivityManager.CONNECTIVITY_ACTION_IMMEDIATE; 23import static android.net.ConnectivityManager.TYPE_NONE; 24import static android.net.ConnectivityManager.TYPE_VPN; 25import static android.net.ConnectivityManager.getNetworkTypeName; 26import static android.net.ConnectivityManager.isNetworkTypeValid; 27import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 28import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 29 30import android.app.AlarmManager; 31import android.app.Notification; 32import android.app.NotificationManager; 33import android.app.PendingIntent; 34import android.content.BroadcastReceiver; 35import android.content.ContentResolver; 36import android.content.Context; 37import android.content.Intent; 38import android.content.IntentFilter; 39import android.content.pm.PackageManager; 40import android.content.res.Configuration; 41import android.content.res.Resources; 42import android.database.ContentObserver; 43import android.net.ConnectivityManager; 44import android.net.IConnectivityManager; 45import android.net.INetworkManagementEventObserver; 46import android.net.INetworkPolicyListener; 47import android.net.INetworkPolicyManager; 48import android.net.INetworkStatsService; 49import android.net.LinkProperties; 50import android.net.LinkProperties.CompareResult; 51import android.net.MobileDataStateTracker; 52import android.net.Network; 53import android.net.NetworkAgent; 54import android.net.NetworkCapabilities; 55import android.net.NetworkConfig; 56import android.net.NetworkInfo; 57import android.net.NetworkInfo.DetailedState; 58import android.net.NetworkMisc; 59import android.net.NetworkQuotaInfo; 60import android.net.NetworkRequest; 61import android.net.NetworkState; 62import android.net.NetworkStateTracker; 63import android.net.NetworkUtils; 64import android.net.Proxy; 65import android.net.ProxyInfo; 66import android.net.RouteInfo; 67import android.net.SamplingDataTracker; 68import android.net.UidRange; 69import android.net.Uri; 70import android.os.Binder; 71import android.os.Bundle; 72import android.os.FileUtils; 73import android.os.Handler; 74import android.os.HandlerThread; 75import android.os.IBinder; 76import android.os.INetworkManagementService; 77import android.os.Looper; 78import android.os.Message; 79import android.os.Messenger; 80import android.os.ParcelFileDescriptor; 81import android.os.PowerManager; 82import android.os.Process; 83import android.os.RemoteException; 84import android.os.SystemClock; 85import android.os.SystemProperties; 86import android.os.UserHandle; 87import android.os.UserManager; 88import android.provider.Settings; 89import android.security.Credentials; 90import android.security.KeyStore; 91import android.telephony.TelephonyManager; 92import android.text.TextUtils; 93import android.util.Slog; 94import android.util.SparseArray; 95import android.util.SparseIntArray; 96import android.util.Xml; 97 98import com.android.internal.R; 99import com.android.internal.annotations.GuardedBy; 100import com.android.internal.app.IBatteryStats; 101import com.android.internal.net.LegacyVpnInfo; 102import com.android.internal.net.NetworkStatsFactory; 103import com.android.internal.net.VpnConfig; 104import com.android.internal.net.VpnProfile; 105import com.android.internal.telephony.DctConstants; 106import com.android.internal.util.AsyncChannel; 107import com.android.internal.util.IndentingPrintWriter; 108import com.android.internal.util.XmlUtils; 109import com.android.server.am.BatteryStatsService; 110import com.android.server.connectivity.DataConnectionStats; 111import com.android.server.connectivity.Nat464Xlat; 112import com.android.server.connectivity.NetworkAgentInfo; 113import com.android.server.connectivity.NetworkMonitor; 114import com.android.server.connectivity.PacManager; 115import com.android.server.connectivity.PermissionMonitor; 116import com.android.server.connectivity.Tethering; 117import com.android.server.connectivity.Vpn; 118import com.android.server.net.BaseNetworkObserver; 119import com.android.server.net.LockdownVpnTracker; 120import com.google.android.collect.Lists; 121import com.google.android.collect.Sets; 122 123import org.xmlpull.v1.XmlPullParser; 124import org.xmlpull.v1.XmlPullParserException; 125 126import java.io.File; 127import java.io.FileDescriptor; 128import java.io.FileNotFoundException; 129import java.io.FileReader; 130import java.io.IOException; 131import java.io.PrintWriter; 132import java.net.Inet4Address; 133import java.net.InetAddress; 134import java.net.UnknownHostException; 135import java.util.ArrayList; 136import java.util.Arrays; 137import java.util.Collection; 138import java.util.HashMap; 139import java.util.HashSet; 140import java.util.Iterator; 141import java.util.List; 142import java.util.Map; 143import java.util.Objects; 144import java.util.concurrent.atomic.AtomicInteger; 145 146/** 147 * @hide 148 */ 149public class ConnectivityService extends IConnectivityManager.Stub 150 implements PendingIntent.OnFinished { 151 private static final String TAG = "ConnectivityService"; 152 153 private static final boolean DBG = true; 154 private static final boolean VDBG = false; 155 156 // network sampling debugging 157 private static final boolean SAMPLE_DBG = false; 158 159 private static final boolean LOGD_RULES = false; 160 161 // TODO: create better separation between radio types and network types 162 163 // how long to wait before switching back to a radio's default network 164 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 165 // system property that can override the above value 166 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 167 "android.telephony.apn-restore"; 168 169 // Default value if FAIL_FAST_TIME_MS is not set 170 private static final int DEFAULT_FAIL_FAST_TIME_MS = 1 * 60 * 1000; 171 // system property that can override DEFAULT_FAIL_FAST_TIME_MS 172 private static final String FAIL_FAST_TIME_MS = 173 "persist.radio.fail_fast_time_ms"; 174 175 private static final String ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED = 176 "android.net.ConnectivityService.action.PKT_CNT_SAMPLE_INTERVAL_ELAPSED"; 177 178 private static final int SAMPLE_INTERVAL_ELAPSED_REQUEST_CODE = 0; 179 180 // How long to delay to removal of a pending intent based request. 181 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 182 private final int mReleasePendingIntentDelayMs; 183 184 private PendingIntent mSampleIntervalElapsedIntent; 185 186 // Set network sampling interval at 12 minutes, this way, even if the timers get 187 // aggregated, it will fire at around 15 minutes, which should allow us to 188 // aggregate this timer with other timers (specially the socket keep alive timers) 189 private static final int DEFAULT_SAMPLING_INTERVAL_IN_SECONDS = (SAMPLE_DBG ? 30 : 12 * 60); 190 191 // start network sampling a minute after booting ... 192 private static final int DEFAULT_START_SAMPLING_INTERVAL_IN_SECONDS = (SAMPLE_DBG ? 30 : 60); 193 194 AlarmManager mAlarmManager; 195 196 private Tethering mTethering; 197 198 private final PermissionMonitor mPermissionMonitor; 199 200 private KeyStore mKeyStore; 201 202 @GuardedBy("mVpns") 203 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 204 205 private boolean mLockdownEnabled; 206 private LockdownVpnTracker mLockdownTracker; 207 208 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 209 private Object mRulesLock = new Object(); 210 /** Currently active network rules by UID. */ 211 private SparseIntArray mUidRules = new SparseIntArray(); 212 /** Set of ifaces that are costly. */ 213 private HashSet<String> mMeteredIfaces = Sets.newHashSet(); 214 215 /** 216 * Sometimes we want to refer to the individual network state 217 * trackers separately, and sometimes we just want to treat them 218 * abstractly. 219 */ 220 private NetworkStateTracker mNetTrackers[]; 221 222 private Context mContext; 223 private int mNetworkPreference; 224 // 0 is full bad, 100 is full good 225 private int mDefaultInetConditionPublished = 0; 226 227 private Object mDnsLock = new Object(); 228 private int mNumDnsEntries; 229 230 private boolean mTestMode; 231 private static ConnectivityService sServiceInstance; 232 233 private INetworkManagementService mNetd; 234 private INetworkStatsService mStatsService; 235 private INetworkPolicyManager mPolicyManager; 236 237 private String mCurrentTcpBufferSizes; 238 239 private static final int ENABLED = 1; 240 private static final int DISABLED = 0; 241 242 // Arguments to rematchNetworkAndRequests() 243 private enum NascentState { 244 // Indicates a network was just validated for the first time. If the network is found to 245 // be unwanted (i.e. not satisfy any NetworkRequests) it is torn down. 246 JUST_VALIDATED, 247 // Indicates a network was not validated for the first time immediately prior to this call. 248 NOT_JUST_VALIDATED 249 }; 250 private enum ReapUnvalidatedNetworks { 251 // Tear down unvalidated networks that have no chance (i.e. even if validated) of becoming 252 // the highest scoring network satisfying a NetworkRequest. This should be passed when it's 253 // known that there may be unvalidated networks that could potentially be reaped, and when 254 // all networks have been rematched against all NetworkRequests. 255 REAP, 256 // Don't reap unvalidated networks. This should be passed when it's known that there are 257 // no unvalidated networks that could potentially be reaped, and when some networks have 258 // not yet been rematched against all NetworkRequests. 259 DONT_REAP 260 }; 261 262 /** 263 * used internally to change our mobile data enabled flag 264 */ 265 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 266 267 /** 268 * used internally to clear a wakelock when transitioning 269 * from one net to another. Clear happens when we get a new 270 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 271 * after a timeout if no network is found (typically 1 min). 272 */ 273 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 274 275 /** 276 * used internally to reload global proxy settings 277 */ 278 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 279 280 /** 281 * used internally to set external dependency met/unmet 282 * arg1 = ENABLED (met) or DISABLED (unmet) 283 * arg2 = NetworkType 284 */ 285 private static final int EVENT_SET_DEPENDENCY_MET = 10; 286 287 /** 288 * used internally to send a sticky broadcast delayed. 289 */ 290 private static final int EVENT_SEND_STICKY_BROADCAST_INTENT = 11; 291 292 /** 293 * Used internally to disable fail fast of mobile data 294 */ 295 private static final int EVENT_ENABLE_FAIL_FAST_MOBILE_DATA = 14; 296 297 /** 298 * used internally to indicate that data sampling interval is up 299 */ 300 private static final int EVENT_SAMPLE_INTERVAL_ELAPSED = 15; 301 302 /** 303 * PAC manager has received new port. 304 */ 305 private static final int EVENT_PROXY_HAS_CHANGED = 16; 306 307 /** 308 * used internally when registering NetworkFactories 309 * obj = NetworkFactoryInfo 310 */ 311 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 312 313 /** 314 * used internally when registering NetworkAgents 315 * obj = Messenger 316 */ 317 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 318 319 /** 320 * used to add a network request 321 * includes a NetworkRequestInfo 322 */ 323 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 324 325 /** 326 * indicates a timeout period is over - check if we had a network yet or not 327 * and if not, call the timeout calback (but leave the request live until they 328 * cancel it. 329 * includes a NetworkRequestInfo 330 */ 331 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 332 333 /** 334 * used to add a network listener - no request 335 * includes a NetworkRequestInfo 336 */ 337 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 338 339 /** 340 * used to remove a network request, either a listener or a real request 341 * arg1 = UID of caller 342 * obj = NetworkRequest 343 */ 344 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 345 346 /** 347 * used internally when registering NetworkFactories 348 * obj = Messenger 349 */ 350 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 351 352 /** 353 * used internally to expire a wakelock when transitioning 354 * from one net to another. Expire happens when we fail to find 355 * a new network (typically after 1 minute) - 356 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 357 * a replacement network. 358 */ 359 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 360 361 /** 362 * Used internally to indicate the system is ready. 363 */ 364 private static final int EVENT_SYSTEM_READY = 25; 365 366 /** 367 * used to add a network request with a pending intent 368 * includes a NetworkRequestInfo 369 */ 370 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 371 372 /** 373 * used to remove a pending intent and its associated network request. 374 * arg1 = UID of caller 375 * obj = PendingIntent 376 */ 377 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 378 379 380 /** Handler used for internal events. */ 381 final private InternalHandler mHandler; 382 /** Handler used for incoming {@link NetworkStateTracker} events. */ 383 final private NetworkStateTrackerHandler mTrackerHandler; 384 385 private boolean mSystemReady; 386 private Intent mInitialBroadcast; 387 388 private PowerManager.WakeLock mNetTransitionWakeLock; 389 private String mNetTransitionWakeLockCausedBy = ""; 390 private int mNetTransitionWakeLockSerialNumber; 391 private int mNetTransitionWakeLockTimeout; 392 private final PowerManager.WakeLock mPendingIntentWakeLock; 393 394 private InetAddress mDefaultDns; 395 396 // used in DBG mode to track inet condition reports 397 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 398 private ArrayList mInetLog; 399 400 // track the current default http proxy - tell the world if we get a new one (real change) 401 private volatile ProxyInfo mDefaultProxy = null; 402 private Object mProxyLock = new Object(); 403 private boolean mDefaultProxyDisabled = false; 404 405 // track the global proxy. 406 private ProxyInfo mGlobalProxy = null; 407 408 private PacManager mPacManager = null; 409 410 private SettingsObserver mSettingsObserver; 411 412 private UserManager mUserManager; 413 414 NetworkConfig[] mNetConfigs; 415 int mNetworksDefined; 416 417 // the set of network types that can only be enabled by system/sig apps 418 List mProtectedNetworks; 419 420 private DataConnectionStats mDataConnectionStats; 421 422 private AtomicInteger mEnableFailFastMobileDataTag = new AtomicInteger(0); 423 424 TelephonyManager mTelephonyManager; 425 426 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 427 private final static int MIN_NET_ID = 100; // some reserved marks 428 private final static int MAX_NET_ID = 65535; 429 private int mNextNetId = MIN_NET_ID; 430 431 // sequence number of NetworkRequests 432 private int mNextNetworkRequestId = 1; 433 434 /** 435 * Implements support for the legacy "one network per network type" model. 436 * 437 * We used to have a static array of NetworkStateTrackers, one for each 438 * network type, but that doesn't work any more now that we can have, 439 * for example, more that one wifi network. This class stores all the 440 * NetworkAgentInfo objects that support a given type, but the legacy 441 * API will only see the first one. 442 * 443 * It serves two main purposes: 444 * 445 * 1. Provide information about "the network for a given type" (since this 446 * API only supports one). 447 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 448 * the first network for a given type changes, or if the default network 449 * changes. 450 */ 451 private class LegacyTypeTracker { 452 453 private static final boolean DBG = true; 454 private static final boolean VDBG = false; 455 private static final String TAG = "CSLegacyTypeTracker"; 456 457 /** 458 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 459 * Each list holds references to all NetworkAgentInfos that are used to 460 * satisfy requests for that network type. 461 * 462 * This array is built out at startup such that an unsupported network 463 * doesn't get an ArrayList instance, making this a tristate: 464 * unsupported, supported but not active and active. 465 * 466 * The actual lists are populated when we scan the network types that 467 * are supported on this device. 468 */ 469 private ArrayList<NetworkAgentInfo> mTypeLists[]; 470 471 public LegacyTypeTracker() { 472 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 473 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 474 } 475 476 public void addSupportedType(int type) { 477 if (mTypeLists[type] != null) { 478 throw new IllegalStateException( 479 "legacy list for type " + type + "already initialized"); 480 } 481 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 482 } 483 484 public boolean isTypeSupported(int type) { 485 return isNetworkTypeValid(type) && mTypeLists[type] != null; 486 } 487 488 public NetworkAgentInfo getNetworkForType(int type) { 489 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 490 return mTypeLists[type].get(0); 491 } else { 492 return null; 493 } 494 } 495 496 private void maybeLogBroadcast(NetworkAgentInfo nai, boolean connected, int type) { 497 if (DBG) { 498 log("Sending " + (connected ? "connected" : "disconnected") + 499 " broadcast for type " + type + " " + nai.name() + 500 " isDefaultNetwork=" + isDefaultNetwork(nai)); 501 } 502 } 503 504 /** Adds the given network to the specified legacy type list. */ 505 public void add(int type, NetworkAgentInfo nai) { 506 if (!isTypeSupported(type)) { 507 return; // Invalid network type. 508 } 509 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 510 511 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 512 if (list.contains(nai)) { 513 loge("Attempting to register duplicate agent for type " + type + ": " + nai); 514 return; 515 } 516 517 list.add(nai); 518 519 // Send a broadcast if this is the first network of its type or if it's the default. 520 if (list.size() == 1 || isDefaultNetwork(nai)) { 521 maybeLogBroadcast(nai, true, type); 522 sendLegacyNetworkBroadcast(nai, true, type); 523 } 524 } 525 526 /** Removes the given network from the specified legacy type list. */ 527 public void remove(int type, NetworkAgentInfo nai) { 528 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 529 if (list == null || list.isEmpty()) { 530 return; 531 } 532 533 boolean wasFirstNetwork = list.get(0).equals(nai); 534 535 if (!list.remove(nai)) { 536 return; 537 } 538 539 if (wasFirstNetwork || isDefaultNetwork(nai)) { 540 maybeLogBroadcast(nai, false, type); 541 sendLegacyNetworkBroadcast(nai, false, type); 542 } 543 544 if (!list.isEmpty() && wasFirstNetwork) { 545 if (DBG) log("Other network available for type " + type + 546 ", sending connected broadcast"); 547 maybeLogBroadcast(list.get(0), false, type); 548 sendLegacyNetworkBroadcast(list.get(0), false, type); 549 } 550 } 551 552 /** Removes the given network from all legacy type lists. */ 553 public void remove(NetworkAgentInfo nai) { 554 if (VDBG) log("Removing agent " + nai); 555 for (int type = 0; type < mTypeLists.length; type++) { 556 remove(type, nai); 557 } 558 } 559 560 private String naiToString(NetworkAgentInfo nai) { 561 String name = (nai != null) ? nai.name() : "null"; 562 String state = (nai.networkInfo != null) ? 563 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 564 "???/???"; 565 return name + " " + state; 566 } 567 568 public void dump(IndentingPrintWriter pw) { 569 for (int type = 0; type < mTypeLists.length; type++) { 570 if (mTypeLists[type] == null) continue; 571 pw.print(type + " "); 572 pw.increaseIndent(); 573 if (mTypeLists[type].size() == 0) pw.println("none"); 574 for (NetworkAgentInfo nai : mTypeLists[type]) { 575 pw.println(naiToString(nai)); 576 } 577 pw.decreaseIndent(); 578 } 579 } 580 581 // This class needs its own log method because it has a different TAG. 582 private void log(String s) { 583 Slog.d(TAG, s); 584 } 585 586 } 587 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 588 589 public ConnectivityService(Context context, INetworkManagementService netManager, 590 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 591 if (DBG) log("ConnectivityService starting up"); 592 593 NetworkCapabilities netCap = new NetworkCapabilities(); 594 netCap.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET); 595 netCap.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED); 596 mDefaultRequest = new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 597 NetworkRequestInfo nri = new NetworkRequestInfo(null, mDefaultRequest, new Binder(), 598 NetworkRequestInfo.REQUEST); 599 mNetworkRequests.put(mDefaultRequest, nri); 600 601 HandlerThread handlerThread = new HandlerThread("ConnectivityServiceThread"); 602 handlerThread.start(); 603 mHandler = new InternalHandler(handlerThread.getLooper()); 604 mTrackerHandler = new NetworkStateTrackerHandler(handlerThread.getLooper()); 605 606 // setup our unique device name 607 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 608 String id = Settings.Secure.getString(context.getContentResolver(), 609 Settings.Secure.ANDROID_ID); 610 if (id != null && id.length() > 0) { 611 String name = new String("android-").concat(id); 612 SystemProperties.set("net.hostname", name); 613 } 614 } 615 616 // read our default dns server ip 617 String dns = Settings.Global.getString(context.getContentResolver(), 618 Settings.Global.DEFAULT_DNS_SERVER); 619 if (dns == null || dns.length() == 0) { 620 dns = context.getResources().getString( 621 com.android.internal.R.string.config_default_dns_server); 622 } 623 try { 624 mDefaultDns = NetworkUtils.numericToInetAddress(dns); 625 } catch (IllegalArgumentException e) { 626 loge("Error setting defaultDns using " + dns); 627 } 628 629 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 630 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 631 632 mContext = checkNotNull(context, "missing Context"); 633 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 634 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 635 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 636 mKeyStore = KeyStore.getInstance(); 637 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 638 639 try { 640 mPolicyManager.registerListener(mPolicyListener); 641 } catch (RemoteException e) { 642 // ouch, no rules updates means some processes may never get network 643 loge("unable to register INetworkPolicyListener" + e.toString()); 644 } 645 646 final PowerManager powerManager = (PowerManager) context.getSystemService( 647 Context.POWER_SERVICE); 648 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 649 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 650 com.android.internal.R.integer.config_networkTransitionTimeout); 651 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 652 653 mNetTrackers = new NetworkStateTracker[ 654 ConnectivityManager.MAX_NETWORK_TYPE+1]; 655 656 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 657 658 // TODO: What is the "correct" way to do determine if this is a wifi only device? 659 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 660 log("wifiOnly=" + wifiOnly); 661 String[] naStrings = context.getResources().getStringArray( 662 com.android.internal.R.array.networkAttributes); 663 for (String naString : naStrings) { 664 try { 665 NetworkConfig n = new NetworkConfig(naString); 666 if (VDBG) log("naString=" + naString + " config=" + n); 667 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 668 loge("Error in networkAttributes - ignoring attempt to define type " + 669 n.type); 670 continue; 671 } 672 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 673 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 674 n.type); 675 continue; 676 } 677 if (mNetConfigs[n.type] != null) { 678 loge("Error in networkAttributes - ignoring attempt to redefine type " + 679 n.type); 680 continue; 681 } 682 mLegacyTypeTracker.addSupportedType(n.type); 683 684 mNetConfigs[n.type] = n; 685 mNetworksDefined++; 686 } catch(Exception e) { 687 // ignore it - leave the entry null 688 } 689 } 690 691 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 692 if (mNetConfigs[TYPE_VPN] == null) { 693 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 694 // don't need to add TYPE_VPN to mNetConfigs. 695 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 696 mNetworksDefined++; // used only in the log() statement below. 697 } 698 699 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 700 701 mProtectedNetworks = new ArrayList<Integer>(); 702 int[] protectedNetworks = context.getResources().getIntArray( 703 com.android.internal.R.array.config_protectedNetworks); 704 for (int p : protectedNetworks) { 705 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 706 mProtectedNetworks.add(p); 707 } else { 708 if (DBG) loge("Ignoring protectedNetwork " + p); 709 } 710 } 711 712 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 713 && SystemProperties.get("ro.build.type").equals("eng"); 714 715 mTethering = new Tethering(mContext, mNetd, statsService, mHandler.getLooper()); 716 717 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 718 719 //set up the listener for user state for creating user VPNs 720 IntentFilter intentFilter = new IntentFilter(); 721 intentFilter.addAction(Intent.ACTION_USER_STARTING); 722 intentFilter.addAction(Intent.ACTION_USER_STOPPING); 723 mContext.registerReceiverAsUser( 724 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 725 726 try { 727 mNetd.registerObserver(mTethering); 728 mNetd.registerObserver(mDataActivityObserver); 729 } catch (RemoteException e) { 730 loge("Error registering observer :" + e); 731 } 732 733 if (DBG) { 734 mInetLog = new ArrayList(); 735 } 736 737 mSettingsObserver = new SettingsObserver(mHandler, EVENT_APPLY_GLOBAL_HTTP_PROXY); 738 mSettingsObserver.observe(mContext); 739 740 mDataConnectionStats = new DataConnectionStats(mContext); 741 mDataConnectionStats.startMonitoring(); 742 743 mAlarmManager = (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE); 744 745 IntentFilter filter = new IntentFilter(); 746 filter.addAction(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED); 747 mContext.registerReceiver( 748 new BroadcastReceiver() { 749 @Override 750 public void onReceive(Context context, Intent intent) { 751 String action = intent.getAction(); 752 if (action.equals(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED)) { 753 mHandler.sendMessage(mHandler.obtainMessage 754 (EVENT_SAMPLE_INTERVAL_ELAPSED)); 755 } 756 } 757 }, 758 new IntentFilter(filter)); 759 760 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 761 762 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 763 } 764 765 private synchronized int nextNetworkRequestId() { 766 return mNextNetworkRequestId++; 767 } 768 769 private void assignNextNetId(NetworkAgentInfo nai) { 770 synchronized (mNetworkForNetId) { 771 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 772 int netId = mNextNetId; 773 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 774 // Make sure NetID unused. http://b/16815182 775 if (mNetworkForNetId.get(netId) == null) { 776 nai.network = new Network(netId); 777 mNetworkForNetId.put(netId, nai); 778 return; 779 } 780 } 781 } 782 throw new IllegalStateException("No free netIds"); 783 } 784 785 private boolean teardown(NetworkStateTracker netTracker) { 786 if (netTracker.teardown()) { 787 netTracker.setTeardownRequested(true); 788 return true; 789 } else { 790 return false; 791 } 792 } 793 794 private NetworkState getFilteredNetworkState(int networkType, int uid) { 795 NetworkInfo info = null; 796 LinkProperties lp = null; 797 NetworkCapabilities nc = null; 798 Network network = null; 799 String subscriberId = null; 800 801 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 802 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 803 if (nai != null) { 804 synchronized (nai) { 805 info = new NetworkInfo(nai.networkInfo); 806 lp = new LinkProperties(nai.linkProperties); 807 nc = new NetworkCapabilities(nai.networkCapabilities); 808 network = new Network(nai.network); 809 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 810 } 811 info.setType(networkType); 812 } else { 813 info = new NetworkInfo(networkType, 0, getNetworkTypeName(networkType), ""); 814 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 815 info.setIsAvailable(true); 816 lp = new LinkProperties(); 817 nc = new NetworkCapabilities(); 818 network = null; 819 } 820 info = getFilteredNetworkInfo(info, lp, uid); 821 } 822 823 return new NetworkState(info, lp, nc, network, subscriberId, null); 824 } 825 826 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 827 if (network == null) { 828 return null; 829 } 830 synchronized (mNetworkForNetId) { 831 return mNetworkForNetId.get(network.netId); 832 } 833 }; 834 835 private NetworkState getUnfilteredActiveNetworkState(int uid) { 836 NetworkInfo info = null; 837 LinkProperties lp = null; 838 NetworkCapabilities nc = null; 839 Network network = null; 840 String subscriberId = null; 841 842 NetworkAgentInfo nai = mNetworkForRequestId.get(mDefaultRequest.requestId); 843 844 if (!mLockdownEnabled) { 845 int user = UserHandle.getUserId(uid); 846 synchronized (mVpns) { 847 Vpn vpn = mVpns.get(user); 848 if (vpn != null && vpn.appliesToUid(uid)) { 849 // getUnderlyingNetworks() returns: 850 // null => the VPN didn't specify anything, so we use the default. 851 // empty array => the VPN explicitly said "no default network". 852 // non-empty array => the VPN specified one or more default networks; we use the 853 // first one. 854 Network[] networks = vpn.getUnderlyingNetworks(); 855 if (networks != null) { 856 if (networks.length > 0) { 857 nai = getNetworkAgentInfoForNetwork(networks[0]); 858 } else { 859 nai = null; 860 } 861 } 862 } 863 } 864 } 865 866 if (nai != null) { 867 synchronized (nai) { 868 info = new NetworkInfo(nai.networkInfo); 869 lp = new LinkProperties(nai.linkProperties); 870 nc = new NetworkCapabilities(nai.networkCapabilities); 871 network = new Network(nai.network); 872 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 873 } 874 } 875 876 return new NetworkState(info, lp, nc, network, subscriberId, null); 877 } 878 879 /** 880 * Check if UID should be blocked from using the network with the given LinkProperties. 881 */ 882 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 883 final boolean networkCostly; 884 final int uidRules; 885 886 final String iface = (lp == null ? "" : lp.getInterfaceName()); 887 synchronized (mRulesLock) { 888 networkCostly = mMeteredIfaces.contains(iface); 889 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 890 } 891 892 if (networkCostly && (uidRules & RULE_REJECT_METERED) != 0) { 893 return true; 894 } 895 896 // no restrictive rules; network is visible 897 return false; 898 } 899 900 /** 901 * Return a filtered {@link NetworkInfo}, potentially marked 902 * {@link DetailedState#BLOCKED} based on 903 * {@link #isNetworkWithLinkPropertiesBlocked}. 904 */ 905 private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, LinkProperties lp, int uid) { 906 if (info != null && isNetworkWithLinkPropertiesBlocked(lp, uid)) { 907 // network is blocked; clone and override state 908 info = new NetworkInfo(info); 909 info.setDetailedState(DetailedState.BLOCKED, null, null); 910 if (DBG) { 911 log("returning Blocked NetworkInfo for ifname=" + 912 lp.getInterfaceName() + ", uid=" + uid); 913 } 914 } 915 if (info != null && mLockdownTracker != null) { 916 info = mLockdownTracker.augmentNetworkInfo(info); 917 if (DBG) log("returning Locked NetworkInfo"); 918 } 919 return info; 920 } 921 922 /** 923 * Return NetworkInfo for the active (i.e., connected) network interface. 924 * It is assumed that at most one network is active at a time. If more 925 * than one is active, it is indeterminate which will be returned. 926 * @return the info for the active network, or {@code null} if none is 927 * active 928 */ 929 @Override 930 public NetworkInfo getActiveNetworkInfo() { 931 enforceAccessPermission(); 932 final int uid = Binder.getCallingUid(); 933 NetworkState state = getUnfilteredActiveNetworkState(uid); 934 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 935 } 936 937 /** 938 * Find the first Provisioning network. 939 * 940 * @return NetworkInfo or null if none. 941 */ 942 private NetworkInfo getProvisioningNetworkInfo() { 943 enforceAccessPermission(); 944 945 // Find the first Provisioning Network 946 NetworkInfo provNi = null; 947 for (NetworkInfo ni : getAllNetworkInfo()) { 948 if (ni.isConnectedToProvisioningNetwork()) { 949 provNi = ni; 950 break; 951 } 952 } 953 if (DBG) log("getProvisioningNetworkInfo: X provNi=" + provNi); 954 return provNi; 955 } 956 957 /** 958 * Find the first Provisioning network or the ActiveDefaultNetwork 959 * if there is no Provisioning network 960 * 961 * @return NetworkInfo or null if none. 962 */ 963 @Override 964 public NetworkInfo getProvisioningOrActiveNetworkInfo() { 965 enforceAccessPermission(); 966 967 NetworkInfo provNi = getProvisioningNetworkInfo(); 968 if (provNi == null) { 969 provNi = getActiveNetworkInfo(); 970 } 971 if (DBG) log("getProvisioningOrActiveNetworkInfo: X provNi=" + provNi); 972 return provNi; 973 } 974 975 public NetworkInfo getActiveNetworkInfoUnfiltered() { 976 enforceAccessPermission(); 977 final int uid = Binder.getCallingUid(); 978 NetworkState state = getUnfilteredActiveNetworkState(uid); 979 return state.networkInfo; 980 } 981 982 @Override 983 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 984 enforceConnectivityInternalPermission(); 985 NetworkState state = getUnfilteredActiveNetworkState(uid); 986 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 987 } 988 989 @Override 990 public NetworkInfo getNetworkInfo(int networkType) { 991 enforceAccessPermission(); 992 final int uid = Binder.getCallingUid(); 993 NetworkState state = getFilteredNetworkState(networkType, uid); 994 return state.networkInfo; 995 } 996 997 @Override 998 public NetworkInfo getNetworkInfoForNetwork(Network network) { 999 enforceAccessPermission(); 1000 final int uid = Binder.getCallingUid(); 1001 NetworkInfo info = null; 1002 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1003 if (nai != null) { 1004 synchronized (nai) { 1005 info = new NetworkInfo(nai.networkInfo); 1006 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1007 } 1008 } 1009 return info; 1010 } 1011 1012 @Override 1013 public NetworkInfo[] getAllNetworkInfo() { 1014 enforceAccessPermission(); 1015 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1016 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1017 networkType++) { 1018 NetworkInfo info = getNetworkInfo(networkType); 1019 if (info != null) { 1020 result.add(info); 1021 } 1022 } 1023 return result.toArray(new NetworkInfo[result.size()]); 1024 } 1025 1026 @Override 1027 public Network getNetworkForType(int networkType) { 1028 enforceAccessPermission(); 1029 final int uid = Binder.getCallingUid(); 1030 NetworkState state = getFilteredNetworkState(networkType, uid); 1031 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1032 return state.network; 1033 } 1034 return null; 1035 } 1036 1037 @Override 1038 public Network[] getAllNetworks() { 1039 enforceAccessPermission(); 1040 final ArrayList<Network> result = new ArrayList(); 1041 synchronized (mNetworkForNetId) { 1042 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1043 result.add(new Network(mNetworkForNetId.valueAt(i).network)); 1044 } 1045 } 1046 return result.toArray(new Network[result.size()]); 1047 } 1048 1049 private NetworkCapabilities getNetworkCapabilitiesAndValidation(NetworkAgentInfo nai) { 1050 if (nai != null) { 1051 synchronized (nai) { 1052 if (nai.created) { 1053 NetworkCapabilities nc = new NetworkCapabilities(nai.networkCapabilities); 1054 if (nai.lastValidated) { 1055 nc.addCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED); 1056 } else { 1057 nc.removeCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED); 1058 } 1059 return nc; 1060 } 1061 } 1062 } 1063 return null; 1064 } 1065 1066 @Override 1067 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1068 // The basic principle is: if an app's traffic could possibly go over a 1069 // network, without the app doing anything multinetwork-specific, 1070 // (hence, by "default"), then include that network's capabilities in 1071 // the array. 1072 // 1073 // In the normal case, app traffic only goes over the system's default 1074 // network connection, so that's the only network returned. 1075 // 1076 // With a VPN in force, some app traffic may go into the VPN, and thus 1077 // over whatever underlying networks the VPN specifies, while other app 1078 // traffic may go over the system default network (e.g.: a split-tunnel 1079 // VPN, or an app disallowed by the VPN), so the set of networks 1080 // returned includes the VPN's underlying networks and the system 1081 // default. 1082 enforceAccessPermission(); 1083 1084 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1085 1086 NetworkAgentInfo nai = getDefaultNetwork(); 1087 NetworkCapabilities nc = getNetworkCapabilitiesAndValidation(getDefaultNetwork()); 1088 if (nc != null) { 1089 result.put(nai.network, nc); 1090 } 1091 1092 if (!mLockdownEnabled) { 1093 synchronized (mVpns) { 1094 Vpn vpn = mVpns.get(userId); 1095 if (vpn != null) { 1096 Network[] networks = vpn.getUnderlyingNetworks(); 1097 if (networks != null) { 1098 for (Network network : networks) { 1099 nai = getNetworkAgentInfoForNetwork(network); 1100 nc = getNetworkCapabilitiesAndValidation(nai); 1101 if (nc != null) { 1102 result.put(nai.network, nc); 1103 } 1104 } 1105 } 1106 } 1107 } 1108 } 1109 1110 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1111 out = result.values().toArray(out); 1112 return out; 1113 } 1114 1115 @Override 1116 public boolean isNetworkSupported(int networkType) { 1117 enforceAccessPermission(); 1118 return mLegacyTypeTracker.isTypeSupported(networkType); 1119 } 1120 1121 /** 1122 * Return LinkProperties for the active (i.e., connected) default 1123 * network interface. It is assumed that at most one default network 1124 * is active at a time. If more than one is active, it is indeterminate 1125 * which will be returned. 1126 * @return the ip properties for the active network, or {@code null} if 1127 * none is active 1128 */ 1129 @Override 1130 public LinkProperties getActiveLinkProperties() { 1131 enforceAccessPermission(); 1132 final int uid = Binder.getCallingUid(); 1133 NetworkState state = getUnfilteredActiveNetworkState(uid); 1134 return state.linkProperties; 1135 } 1136 1137 @Override 1138 public LinkProperties getLinkPropertiesForType(int networkType) { 1139 enforceAccessPermission(); 1140 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1141 if (nai != null) { 1142 synchronized (nai) { 1143 return new LinkProperties(nai.linkProperties); 1144 } 1145 } 1146 return null; 1147 } 1148 1149 // TODO - this should be ALL networks 1150 @Override 1151 public LinkProperties getLinkProperties(Network network) { 1152 enforceAccessPermission(); 1153 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1154 if (nai != null) { 1155 synchronized (nai) { 1156 return new LinkProperties(nai.linkProperties); 1157 } 1158 } 1159 return null; 1160 } 1161 1162 @Override 1163 public NetworkCapabilities getNetworkCapabilities(Network network) { 1164 enforceAccessPermission(); 1165 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1166 if (nai != null) { 1167 synchronized (nai) { 1168 return new NetworkCapabilities(nai.networkCapabilities); 1169 } 1170 } 1171 return null; 1172 } 1173 1174 @Override 1175 public NetworkState[] getAllNetworkState() { 1176 // Require internal since we're handing out IMSI details 1177 enforceConnectivityInternalPermission(); 1178 1179 final ArrayList<NetworkState> result = Lists.newArrayList(); 1180 for (Network network : getAllNetworks()) { 1181 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1182 if (nai != null) { 1183 synchronized (nai) { 1184 final String subscriberId = (nai.networkMisc != null) 1185 ? nai.networkMisc.subscriberId : null; 1186 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1187 nai.networkCapabilities, network, subscriberId, null)); 1188 } 1189 } 1190 } 1191 return result.toArray(new NetworkState[result.size()]); 1192 } 1193 1194 @Override 1195 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1196 enforceAccessPermission(); 1197 final int uid = Binder.getCallingUid(); 1198 final long token = Binder.clearCallingIdentity(); 1199 try { 1200 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1201 if (state.networkInfo != null) { 1202 try { 1203 return mPolicyManager.getNetworkQuotaInfo(state); 1204 } catch (RemoteException e) { 1205 } 1206 } 1207 return null; 1208 } finally { 1209 Binder.restoreCallingIdentity(token); 1210 } 1211 } 1212 1213 @Override 1214 public boolean isActiveNetworkMetered() { 1215 enforceAccessPermission(); 1216 final int uid = Binder.getCallingUid(); 1217 final long token = Binder.clearCallingIdentity(); 1218 try { 1219 return isActiveNetworkMeteredUnchecked(uid); 1220 } finally { 1221 Binder.restoreCallingIdentity(token); 1222 } 1223 } 1224 1225 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1226 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1227 if (state.networkInfo != null) { 1228 try { 1229 return mPolicyManager.isNetworkMetered(state); 1230 } catch (RemoteException e) { 1231 } 1232 } 1233 return false; 1234 } 1235 1236 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1237 @Override 1238 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1239 int deviceType = Integer.parseInt(label); 1240 sendDataActivityBroadcast(deviceType, active, tsNanos); 1241 } 1242 }; 1243 1244 /** 1245 * Ensure that a network route exists to deliver traffic to the specified 1246 * host via the specified network interface. 1247 * @param networkType the type of the network over which traffic to the 1248 * specified host is to be routed 1249 * @param hostAddress the IP address of the host to which the route is 1250 * desired 1251 * @return {@code true} on success, {@code false} on failure 1252 */ 1253 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1254 enforceChangePermission(); 1255 if (mProtectedNetworks.contains(networkType)) { 1256 enforceConnectivityInternalPermission(); 1257 } 1258 1259 InetAddress addr; 1260 try { 1261 addr = InetAddress.getByAddress(hostAddress); 1262 } catch (UnknownHostException e) { 1263 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1264 return false; 1265 } 1266 1267 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1268 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1269 return false; 1270 } 1271 1272 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1273 if (nai == null) { 1274 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1275 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1276 } else { 1277 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1278 } 1279 return false; 1280 } 1281 1282 DetailedState netState; 1283 synchronized (nai) { 1284 netState = nai.networkInfo.getDetailedState(); 1285 } 1286 1287 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1288 if (VDBG) { 1289 log("requestRouteToHostAddress on down network " 1290 + "(" + networkType + ") - dropped" 1291 + " netState=" + netState); 1292 } 1293 return false; 1294 } 1295 1296 final int uid = Binder.getCallingUid(); 1297 final long token = Binder.clearCallingIdentity(); 1298 try { 1299 LinkProperties lp; 1300 int netId; 1301 synchronized (nai) { 1302 lp = nai.linkProperties; 1303 netId = nai.network.netId; 1304 } 1305 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1306 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1307 return ok; 1308 } finally { 1309 Binder.restoreCallingIdentity(token); 1310 } 1311 } 1312 1313 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1314 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1315 if (bestRoute == null) { 1316 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1317 } else { 1318 String iface = bestRoute.getInterface(); 1319 if (bestRoute.getGateway().equals(addr)) { 1320 // if there is no better route, add the implied hostroute for our gateway 1321 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1322 } else { 1323 // if we will connect to this through another route, add a direct route 1324 // to it's gateway 1325 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1326 } 1327 } 1328 if (DBG) log("Adding " + bestRoute + " for interface " + bestRoute.getInterface()); 1329 try { 1330 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1331 } catch (Exception e) { 1332 // never crash - catch them all 1333 if (DBG) loge("Exception trying to add a route: " + e); 1334 return false; 1335 } 1336 return true; 1337 } 1338 1339 public void setDataDependency(int networkType, boolean met) { 1340 enforceConnectivityInternalPermission(); 1341 1342 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_DEPENDENCY_MET, 1343 (met ? ENABLED : DISABLED), networkType)); 1344 } 1345 1346 private void handleSetDependencyMet(int networkType, boolean met) { 1347 if (mNetTrackers[networkType] != null) { 1348 if (DBG) { 1349 log("handleSetDependencyMet(" + networkType + ", " + met + ")"); 1350 } 1351 mNetTrackers[networkType].setDependencyMet(met); 1352 } 1353 } 1354 1355 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1356 @Override 1357 public void onUidRulesChanged(int uid, int uidRules) { 1358 // caller is NPMS, since we only register with them 1359 if (LOGD_RULES) { 1360 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1361 } 1362 1363 synchronized (mRulesLock) { 1364 // skip update when we've already applied rules 1365 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1366 if (oldRules == uidRules) return; 1367 1368 mUidRules.put(uid, uidRules); 1369 } 1370 1371 // TODO: notify UID when it has requested targeted updates 1372 } 1373 1374 @Override 1375 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1376 // caller is NPMS, since we only register with them 1377 if (LOGD_RULES) { 1378 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1379 } 1380 1381 synchronized (mRulesLock) { 1382 mMeteredIfaces.clear(); 1383 for (String iface : meteredIfaces) { 1384 mMeteredIfaces.add(iface); 1385 } 1386 } 1387 } 1388 1389 @Override 1390 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1391 // caller is NPMS, since we only register with them 1392 if (LOGD_RULES) { 1393 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1394 } 1395 1396 // kick off connectivity change broadcast for active network, since 1397 // global background policy change is radical. 1398 // TODO: Dead code; remove. 1399 // 1400 // final int networkType = mActiveDefaultNetwork; 1401 // if (isNetworkTypeValid(networkType)) { 1402 // final NetworkStateTracker tracker = mNetTrackers[networkType]; 1403 // if (tracker != null) { 1404 // final NetworkInfo info = tracker.getNetworkInfo(); 1405 // if (info != null && info.isConnected()) { 1406 // sendConnectedBroadcast(info); 1407 // } 1408 // } 1409 // } 1410 } 1411 }; 1412 1413 private void enforceInternetPermission() { 1414 mContext.enforceCallingOrSelfPermission( 1415 android.Manifest.permission.INTERNET, 1416 "ConnectivityService"); 1417 } 1418 1419 private void enforceAccessPermission() { 1420 mContext.enforceCallingOrSelfPermission( 1421 android.Manifest.permission.ACCESS_NETWORK_STATE, 1422 "ConnectivityService"); 1423 } 1424 1425 private void enforceChangePermission() { 1426 mContext.enforceCallingOrSelfPermission( 1427 android.Manifest.permission.CHANGE_NETWORK_STATE, 1428 "ConnectivityService"); 1429 } 1430 1431 private void enforceTetherAccessPermission() { 1432 mContext.enforceCallingOrSelfPermission( 1433 android.Manifest.permission.ACCESS_NETWORK_STATE, 1434 "ConnectivityService"); 1435 } 1436 1437 private void enforceConnectivityInternalPermission() { 1438 mContext.enforceCallingOrSelfPermission( 1439 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1440 "ConnectivityService"); 1441 } 1442 1443 public void sendConnectedBroadcast(NetworkInfo info) { 1444 enforceConnectivityInternalPermission(); 1445 sendGeneralBroadcast(info, CONNECTIVITY_ACTION_IMMEDIATE); 1446 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1447 } 1448 1449 private void sendInetConditionBroadcast(NetworkInfo info) { 1450 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1451 } 1452 1453 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1454 if (mLockdownTracker != null) { 1455 info = mLockdownTracker.augmentNetworkInfo(info); 1456 } 1457 1458 Intent intent = new Intent(bcastType); 1459 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1460 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1461 if (info.isFailover()) { 1462 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1463 info.setFailover(false); 1464 } 1465 if (info.getReason() != null) { 1466 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1467 } 1468 if (info.getExtraInfo() != null) { 1469 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1470 info.getExtraInfo()); 1471 } 1472 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1473 return intent; 1474 } 1475 1476 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1477 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1478 } 1479 1480 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1481 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1482 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1483 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1484 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1485 final long ident = Binder.clearCallingIdentity(); 1486 try { 1487 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1488 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1489 } finally { 1490 Binder.restoreCallingIdentity(ident); 1491 } 1492 } 1493 1494 private void sendStickyBroadcast(Intent intent) { 1495 synchronized(this) { 1496 if (!mSystemReady) { 1497 mInitialBroadcast = new Intent(intent); 1498 } 1499 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1500 if (DBG) { 1501 log("sendStickyBroadcast: action=" + intent.getAction()); 1502 } 1503 1504 final long ident = Binder.clearCallingIdentity(); 1505 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1506 final IBatteryStats bs = BatteryStatsService.getService(); 1507 try { 1508 NetworkInfo ni = intent.getParcelableExtra( 1509 ConnectivityManager.EXTRA_NETWORK_INFO); 1510 bs.noteConnectivityChanged(intent.getIntExtra( 1511 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1512 ni != null ? ni.getState().toString() : "?"); 1513 } catch (RemoteException e) { 1514 } 1515 } 1516 try { 1517 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 1518 } finally { 1519 Binder.restoreCallingIdentity(ident); 1520 } 1521 } 1522 } 1523 1524 void systemReady() { 1525 // start network sampling .. 1526 Intent intent = new Intent(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED); 1527 intent.setPackage(mContext.getPackageName()); 1528 1529 mSampleIntervalElapsedIntent = PendingIntent.getBroadcast(mContext, 1530 SAMPLE_INTERVAL_ELAPSED_REQUEST_CODE, intent, 0); 1531 setAlarm(DEFAULT_START_SAMPLING_INTERVAL_IN_SECONDS * 1000, mSampleIntervalElapsedIntent); 1532 1533 loadGlobalProxy(); 1534 1535 synchronized(this) { 1536 mSystemReady = true; 1537 if (mInitialBroadcast != null) { 1538 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1539 mInitialBroadcast = null; 1540 } 1541 } 1542 // load the global proxy at startup 1543 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1544 1545 // Try bringing up tracker, but if KeyStore isn't ready yet, wait 1546 // for user to unlock device. 1547 if (!updateLockdownVpn()) { 1548 final IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT); 1549 mContext.registerReceiver(mUserPresentReceiver, filter); 1550 } 1551 1552 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1553 1554 mPermissionMonitor.startMonitoring(); 1555 } 1556 1557 private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() { 1558 @Override 1559 public void onReceive(Context context, Intent intent) { 1560 // Try creating lockdown tracker, since user present usually means 1561 // unlocked keystore. 1562 if (updateLockdownVpn()) { 1563 mContext.unregisterReceiver(this); 1564 } 1565 } 1566 }; 1567 1568 /** @hide */ 1569 @Override 1570 public void captivePortalCheckCompleted(NetworkInfo info, boolean isCaptivePortal) { 1571 enforceConnectivityInternalPermission(); 1572 if (DBG) log("captivePortalCheckCompleted: ni=" + info + " captive=" + isCaptivePortal); 1573// mNetTrackers[info.getType()].captivePortalCheckCompleted(isCaptivePortal); 1574 } 1575 1576 /** 1577 * Setup data activity tracking for the given network. 1578 * 1579 * Every {@code setupDataActivityTracking} should be paired with a 1580 * {@link #removeDataActivityTracking} for cleanup. 1581 */ 1582 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1583 final String iface = networkAgent.linkProperties.getInterfaceName(); 1584 1585 final int timeout; 1586 int type = ConnectivityManager.TYPE_NONE; 1587 1588 if (networkAgent.networkCapabilities.hasTransport( 1589 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1590 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1591 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1592 5); 1593 type = ConnectivityManager.TYPE_MOBILE; 1594 } else if (networkAgent.networkCapabilities.hasTransport( 1595 NetworkCapabilities.TRANSPORT_WIFI)) { 1596 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1597 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1598 0); 1599 type = ConnectivityManager.TYPE_WIFI; 1600 } else { 1601 // do not track any other networks 1602 timeout = 0; 1603 } 1604 1605 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1606 try { 1607 mNetd.addIdleTimer(iface, timeout, type); 1608 } catch (Exception e) { 1609 // You shall not crash! 1610 loge("Exception in setupDataActivityTracking " + e); 1611 } 1612 } 1613 } 1614 1615 /** 1616 * Remove data activity tracking when network disconnects. 1617 */ 1618 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1619 final String iface = networkAgent.linkProperties.getInterfaceName(); 1620 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1621 1622 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1623 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1624 try { 1625 // the call fails silently if no idletimer setup for this interface 1626 mNetd.removeIdleTimer(iface); 1627 } catch (Exception e) { 1628 loge("Exception in removeDataActivityTracking " + e); 1629 } 1630 } 1631 } 1632 1633 /** 1634 * Reads the network specific MTU size from reources. 1635 * and set it on it's iface. 1636 */ 1637 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1638 final String iface = newLp.getInterfaceName(); 1639 final int mtu = newLp.getMtu(); 1640 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1641 if (VDBG) log("identical MTU - not setting"); 1642 return; 1643 } 1644 1645 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1646 loge("Unexpected mtu value: " + mtu + ", " + iface); 1647 return; 1648 } 1649 1650 // Cannot set MTU without interface name 1651 if (TextUtils.isEmpty(iface)) { 1652 loge("Setting MTU size with null iface."); 1653 return; 1654 } 1655 1656 try { 1657 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1658 mNetd.setMtu(iface, mtu); 1659 } catch (Exception e) { 1660 Slog.e(TAG, "exception in setMtu()" + e); 1661 } 1662 } 1663 1664 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1665 1666 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1667 if (isDefaultNetwork(nai) == false) { 1668 return; 1669 } 1670 1671 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1672 String[] values = null; 1673 if (tcpBufferSizes != null) { 1674 values = tcpBufferSizes.split(","); 1675 } 1676 1677 if (values == null || values.length != 6) { 1678 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1679 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1680 values = tcpBufferSizes.split(","); 1681 } 1682 1683 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1684 1685 try { 1686 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1687 1688 final String prefix = "/sys/kernel/ipv4/tcp_"; 1689 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1690 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1691 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1692 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1693 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1694 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1695 mCurrentTcpBufferSizes = tcpBufferSizes; 1696 } catch (IOException e) { 1697 loge("Can't set TCP buffer sizes:" + e); 1698 } 1699 1700 final String defaultRwndKey = "net.tcp.default_init_rwnd"; 1701 int defaultRwndValue = SystemProperties.getInt(defaultRwndKey, 0); 1702 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1703 Settings.Global.TCP_DEFAULT_INIT_RWND, defaultRwndValue); 1704 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1705 if (rwndValue != 0) { 1706 SystemProperties.set(sysctlKey, rwndValue.toString()); 1707 } 1708 } 1709 1710 private void flushVmDnsCache() { 1711 /* 1712 * Tell the VMs to toss their DNS caches 1713 */ 1714 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1715 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1716 /* 1717 * Connectivity events can happen before boot has completed ... 1718 */ 1719 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1720 final long ident = Binder.clearCallingIdentity(); 1721 try { 1722 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1723 } finally { 1724 Binder.restoreCallingIdentity(ident); 1725 } 1726 } 1727 1728 @Override 1729 public int getRestoreDefaultNetworkDelay(int networkType) { 1730 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1731 NETWORK_RESTORE_DELAY_PROP_NAME); 1732 if(restoreDefaultNetworkDelayStr != null && 1733 restoreDefaultNetworkDelayStr.length() != 0) { 1734 try { 1735 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1736 } catch (NumberFormatException e) { 1737 } 1738 } 1739 // if the system property isn't set, use the value for the apn type 1740 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1741 1742 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1743 (mNetConfigs[networkType] != null)) { 1744 ret = mNetConfigs[networkType].restoreTime; 1745 } 1746 return ret; 1747 } 1748 1749 @Override 1750 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1751 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1752 if (mContext.checkCallingOrSelfPermission( 1753 android.Manifest.permission.DUMP) 1754 != PackageManager.PERMISSION_GRANTED) { 1755 pw.println("Permission Denial: can't dump ConnectivityService " + 1756 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1757 Binder.getCallingUid()); 1758 return; 1759 } 1760 1761 pw.println("NetworkFactories for:"); 1762 pw.increaseIndent(); 1763 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1764 pw.println(nfi.name); 1765 } 1766 pw.decreaseIndent(); 1767 pw.println(); 1768 1769 NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId); 1770 pw.print("Active default network: "); 1771 if (defaultNai == null) { 1772 pw.println("none"); 1773 } else { 1774 pw.println(defaultNai.network.netId); 1775 } 1776 pw.println(); 1777 1778 pw.println("Current Networks:"); 1779 pw.increaseIndent(); 1780 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1781 pw.println(nai.toString()); 1782 pw.increaseIndent(); 1783 pw.println("Requests:"); 1784 pw.increaseIndent(); 1785 for (int i = 0; i < nai.networkRequests.size(); i++) { 1786 pw.println(nai.networkRequests.valueAt(i).toString()); 1787 } 1788 pw.decreaseIndent(); 1789 pw.println("Lingered:"); 1790 pw.increaseIndent(); 1791 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1792 pw.decreaseIndent(); 1793 pw.decreaseIndent(); 1794 } 1795 pw.decreaseIndent(); 1796 pw.println(); 1797 1798 pw.println("Network Requests:"); 1799 pw.increaseIndent(); 1800 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1801 pw.println(nri.toString()); 1802 } 1803 pw.println(); 1804 pw.decreaseIndent(); 1805 1806 pw.println("mLegacyTypeTracker:"); 1807 pw.increaseIndent(); 1808 mLegacyTypeTracker.dump(pw); 1809 pw.decreaseIndent(); 1810 pw.println(); 1811 1812 synchronized (this) { 1813 pw.println("NetworkTransitionWakeLock is currently " + 1814 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held."); 1815 pw.println("It was last requested for "+mNetTransitionWakeLockCausedBy); 1816 } 1817 pw.println(); 1818 1819 mTethering.dump(fd, pw, args); 1820 1821 if (mInetLog != null) { 1822 pw.println(); 1823 pw.println("Inet condition reports:"); 1824 pw.increaseIndent(); 1825 for(int i = 0; i < mInetLog.size(); i++) { 1826 pw.println(mInetLog.get(i)); 1827 } 1828 pw.decreaseIndent(); 1829 } 1830 } 1831 1832 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, String msg) { 1833 if (nai.network == null) return false; 1834 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1835 if (officialNai != null && officialNai.equals(nai)) return true; 1836 if (officialNai != null || VDBG) { 1837 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1838 " - " + nai); 1839 } 1840 return false; 1841 } 1842 1843 private boolean isRequest(NetworkRequest request) { 1844 return mNetworkRequests.get(request).isRequest; 1845 } 1846 1847 // must be stateless - things change under us. 1848 private class NetworkStateTrackerHandler extends Handler { 1849 public NetworkStateTrackerHandler(Looper looper) { 1850 super(looper); 1851 } 1852 1853 @Override 1854 public void handleMessage(Message msg) { 1855 NetworkInfo info; 1856 switch (msg.what) { 1857 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1858 handleAsyncChannelHalfConnect(msg); 1859 break; 1860 } 1861 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1862 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1863 if (nai != null) nai.asyncChannel.disconnect(); 1864 break; 1865 } 1866 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1867 handleAsyncChannelDisconnected(msg); 1868 break; 1869 } 1870 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1871 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1872 if (nai == null) { 1873 loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent"); 1874 } else { 1875 updateCapabilities(nai, (NetworkCapabilities)msg.obj); 1876 } 1877 break; 1878 } 1879 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1880 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1881 if (nai == null) { 1882 loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED"); 1883 } else { 1884 if (VDBG) { 1885 log("Update of LinkProperties for " + nai.name() + 1886 "; created=" + nai.created); 1887 } 1888 LinkProperties oldLp = nai.linkProperties; 1889 synchronized (nai) { 1890 nai.linkProperties = (LinkProperties)msg.obj; 1891 } 1892 if (nai.created) updateLinkProperties(nai, oldLp); 1893 } 1894 break; 1895 } 1896 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1897 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1898 if (nai == null) { 1899 loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent"); 1900 break; 1901 } 1902 info = (NetworkInfo) msg.obj; 1903 updateNetworkInfo(nai, info); 1904 break; 1905 } 1906 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1907 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1908 if (nai == null) { 1909 loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent"); 1910 break; 1911 } 1912 Integer score = (Integer) msg.obj; 1913 if (score != null) updateNetworkScore(nai, score.intValue()); 1914 break; 1915 } 1916 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 1917 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1918 if (nai == null) { 1919 loge("EVENT_UID_RANGES_ADDED from unknown NetworkAgent"); 1920 break; 1921 } 1922 try { 1923 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1924 } catch (Exception e) { 1925 // Never crash! 1926 loge("Exception in addVpnUidRanges: " + e); 1927 } 1928 break; 1929 } 1930 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 1931 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1932 if (nai == null) { 1933 loge("EVENT_UID_RANGES_REMOVED from unknown NetworkAgent"); 1934 break; 1935 } 1936 try { 1937 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1938 } catch (Exception e) { 1939 // Never crash! 1940 loge("Exception in removeVpnUidRanges: " + e); 1941 } 1942 break; 1943 } 1944 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 1945 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1946 if (nai == null) { 1947 loge("EVENT_SET_EXPLICITLY_SELECTED from unknown NetworkAgent"); 1948 break; 1949 } 1950 if (nai.created && !nai.networkMisc.explicitlySelected) { 1951 loge("ERROR: created network explicitly selected."); 1952 } 1953 nai.networkMisc.explicitlySelected = true; 1954 break; 1955 } 1956 case NetworkMonitor.EVENT_NETWORK_TESTED: { 1957 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 1958 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_VALIDATED")) { 1959 boolean valid = (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 1960 nai.lastValidated = valid; 1961 if (valid) { 1962 if (DBG) log("Validated " + nai.name()); 1963 if (!nai.everValidated) { 1964 nai.everValidated = true; 1965 rematchNetworkAndRequests(nai, NascentState.JUST_VALIDATED, 1966 ReapUnvalidatedNetworks.REAP); 1967 // If score has changed, rebroadcast to NetworkFactories. b/17726566 1968 sendUpdatedScoreToFactories(nai); 1969 } 1970 } 1971 updateInetCondition(nai); 1972 // Let the NetworkAgent know the state of its network 1973 nai.asyncChannel.sendMessage( 1974 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 1975 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 1976 0, null); 1977 } 1978 break; 1979 } 1980 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 1981 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 1982 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_LINGER_COMPLETE")) { 1983 handleLingerComplete(nai); 1984 } 1985 break; 1986 } 1987 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 1988 if (msg.arg1 == 0) { 1989 setProvNotificationVisibleIntent(false, msg.arg2, 0, null, null); 1990 } else { 1991 NetworkAgentInfo nai = null; 1992 synchronized (mNetworkForNetId) { 1993 nai = mNetworkForNetId.get(msg.arg2); 1994 } 1995 if (nai == null) { 1996 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 1997 break; 1998 } 1999 setProvNotificationVisibleIntent(true, msg.arg2, nai.networkInfo.getType(), 2000 nai.networkInfo.getExtraInfo(), (PendingIntent)msg.obj); 2001 } 2002 break; 2003 } 2004 case NetworkStateTracker.EVENT_STATE_CHANGED: { 2005 info = (NetworkInfo) msg.obj; 2006 NetworkInfo.State state = info.getState(); 2007 2008 if (VDBG || (state == NetworkInfo.State.CONNECTED) || 2009 (state == NetworkInfo.State.DISCONNECTED) || 2010 (state == NetworkInfo.State.SUSPENDED)) { 2011 log("ConnectivityChange for " + 2012 info.getTypeName() + ": " + 2013 state + "/" + info.getDetailedState()); 2014 } 2015 2016 EventLogTags.writeConnectivityStateChanged( 2017 info.getType(), info.getSubtype(), info.getDetailedState().ordinal()); 2018 2019 if (info.isConnectedToProvisioningNetwork()) { 2020 /** 2021 * TODO: Create ConnectivityManager.TYPE_MOBILE_PROVISIONING 2022 * for now its an in between network, its a network that 2023 * is actually a default network but we don't want it to be 2024 * announced as such to keep background applications from 2025 * trying to use it. It turns out that some still try so we 2026 * take the additional step of clearing any default routes 2027 * to the link that may have incorrectly setup by the lower 2028 * levels. 2029 */ 2030 LinkProperties lp = getLinkPropertiesForType(info.getType()); 2031 if (DBG) { 2032 log("EVENT_STATE_CHANGED: connected to provisioning network, lp=" + lp); 2033 } 2034 2035 // Clear any default routes setup by the radio so 2036 // any activity by applications trying to use this 2037 // connection will fail until the provisioning network 2038 // is enabled. 2039 /* 2040 for (RouteInfo r : lp.getRoutes()) { 2041 removeRoute(lp, r, TO_DEFAULT_TABLE, 2042 mNetTrackers[info.getType()].getNetwork().netId); 2043 } 2044 */ 2045 } else if (state == NetworkInfo.State.DISCONNECTED) { 2046 } else if (state == NetworkInfo.State.SUSPENDED) { 2047 } else if (state == NetworkInfo.State.CONNECTED) { 2048 // handleConnect(info); 2049 } 2050 notifyLockdownVpn(null); 2051 break; 2052 } 2053 case NetworkStateTracker.EVENT_CONFIGURATION_CHANGED: { 2054 info = (NetworkInfo) msg.obj; 2055 // TODO: Temporary allowing network configuration 2056 // change not resetting sockets. 2057 // @see bug/4455071 2058 /* 2059 handleConnectivityChange(info.getType(), mCurrentLinkProperties[info.getType()], 2060 false); 2061 */ 2062 break; 2063 } 2064 } 2065 } 2066 } 2067 2068 // Cancel any lingering so the linger timeout doesn't teardown a network. 2069 // This should be called when a network begins satisfying a NetworkRequest. 2070 // Note: depending on what state the NetworkMonitor is in (e.g., 2071 // if it's awaiting captive portal login, or if validation failed), this 2072 // may trigger a re-evaluation of the network. 2073 private void unlinger(NetworkAgentInfo nai) { 2074 if (VDBG) log("Canceling linger of " + nai.name()); 2075 // If network has never been validated, it cannot have been lingered, so don't bother 2076 // needlessly triggering a re-evaluation. 2077 if (!nai.everValidated) return; 2078 nai.networkLingered.clear(); 2079 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2080 } 2081 2082 private void handleAsyncChannelHalfConnect(Message msg) { 2083 AsyncChannel ac = (AsyncChannel) msg.obj; 2084 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2085 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2086 if (VDBG) log("NetworkFactory connected"); 2087 // A network factory has connected. Send it all current NetworkRequests. 2088 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2089 if (nri.isRequest == false) continue; 2090 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2091 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2092 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2093 } 2094 } else { 2095 loge("Error connecting NetworkFactory"); 2096 mNetworkFactoryInfos.remove(msg.obj); 2097 } 2098 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2099 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2100 if (VDBG) log("NetworkAgent connected"); 2101 // A network agent has requested a connection. Establish the connection. 2102 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2103 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2104 } else { 2105 loge("Error connecting NetworkAgent"); 2106 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2107 if (nai != null) { 2108 synchronized (mNetworkForNetId) { 2109 mNetworkForNetId.remove(nai.network.netId); 2110 } 2111 // Just in case. 2112 mLegacyTypeTracker.remove(nai); 2113 } 2114 } 2115 } 2116 } 2117 2118 private void handleAsyncChannelDisconnected(Message msg) { 2119 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2120 if (nai != null) { 2121 if (DBG) { 2122 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2123 } 2124 // A network agent has disconnected. 2125 if (nai.created) { 2126 // Tell netd to clean up the configuration for this network 2127 // (routing rules, DNS, etc). 2128 try { 2129 mNetd.removeNetwork(nai.network.netId); 2130 } catch (Exception e) { 2131 loge("Exception removing network: " + e); 2132 } 2133 } 2134 // TODO - if we move the logic to the network agent (have them disconnect 2135 // because they lost all their requests or because their score isn't good) 2136 // then they would disconnect organically, report their new state and then 2137 // disconnect the channel. 2138 if (nai.networkInfo.isConnected()) { 2139 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2140 null, null); 2141 } 2142 if (isDefaultNetwork(nai)) { 2143 mDefaultInetConditionPublished = 0; 2144 } 2145 notifyIfacesChanged(); 2146 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2147 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2148 mNetworkAgentInfos.remove(msg.replyTo); 2149 updateClat(null, nai.linkProperties, nai); 2150 mLegacyTypeTracker.remove(nai); 2151 synchronized (mNetworkForNetId) { 2152 mNetworkForNetId.remove(nai.network.netId); 2153 } 2154 // Since we've lost the network, go through all the requests that 2155 // it was satisfying and see if any other factory can satisfy them. 2156 // TODO: This logic may be better replaced with a call to rematchAllNetworksAndRequests 2157 final ArrayList<NetworkAgentInfo> toActivate = new ArrayList<NetworkAgentInfo>(); 2158 for (int i = 0; i < nai.networkRequests.size(); i++) { 2159 NetworkRequest request = nai.networkRequests.valueAt(i); 2160 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2161 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2162 if (DBG) { 2163 log("Checking for replacement network to handle request " + request ); 2164 } 2165 mNetworkForRequestId.remove(request.requestId); 2166 sendUpdatedScoreToFactories(request, 0); 2167 NetworkAgentInfo alternative = null; 2168 for (NetworkAgentInfo existing : mNetworkAgentInfos.values()) { 2169 if (existing.satisfies(request) && 2170 (alternative == null || 2171 alternative.getCurrentScore() < existing.getCurrentScore())) { 2172 alternative = existing; 2173 } 2174 } 2175 if (alternative != null) { 2176 if (DBG) log(" found replacement in " + alternative.name()); 2177 if (!toActivate.contains(alternative)) { 2178 toActivate.add(alternative); 2179 } 2180 } 2181 } 2182 } 2183 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2184 removeDataActivityTracking(nai); 2185 notifyLockdownVpn(nai); 2186 requestNetworkTransitionWakelock(nai.name()); 2187 } 2188 for (NetworkAgentInfo networkToActivate : toActivate) { 2189 unlinger(networkToActivate); 2190 rematchNetworkAndRequests(networkToActivate, NascentState.NOT_JUST_VALIDATED, 2191 ReapUnvalidatedNetworks.DONT_REAP); 2192 } 2193 } 2194 } 2195 2196 // If this method proves to be too slow then we can maintain a separate 2197 // pendingIntent => NetworkRequestInfo map. 2198 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2199 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2200 Intent intent = pendingIntent.getIntent(); 2201 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2202 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2203 if (existingPendingIntent != null && 2204 existingPendingIntent.getIntent().filterEquals(intent)) { 2205 return entry.getValue(); 2206 } 2207 } 2208 return null; 2209 } 2210 2211 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2212 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2213 2214 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2215 if (existingRequest != null) { // remove the existing request. 2216 if (DBG) log("Replacing " + existingRequest.request + " with " 2217 + nri.request + " because their intents matched."); 2218 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2219 } 2220 handleRegisterNetworkRequest(msg); 2221 } 2222 2223 private void handleRegisterNetworkRequest(Message msg) { 2224 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2225 2226 mNetworkRequests.put(nri.request, nri); 2227 2228 // TODO: This logic may be better replaced with a call to rematchNetworkAndRequests 2229 2230 // Check for the best currently alive network that satisfies this request 2231 NetworkAgentInfo bestNetwork = null; 2232 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2233 if (DBG) log("handleRegisterNetworkRequest checking " + network.name()); 2234 if (network.satisfies(nri.request)) { 2235 if (DBG) log("apparently satisfied. currentScore=" + network.getCurrentScore()); 2236 if (!nri.isRequest) { 2237 // Not setting bestNetwork here as a listening NetworkRequest may be 2238 // satisfied by multiple Networks. Instead the request is added to 2239 // each satisfying Network and notified about each. 2240 network.addRequest(nri.request); 2241 notifyNetworkCallback(network, nri); 2242 } else if (bestNetwork == null || 2243 bestNetwork.getCurrentScore() < network.getCurrentScore()) { 2244 bestNetwork = network; 2245 } 2246 } 2247 } 2248 if (bestNetwork != null) { 2249 if (DBG) log("using " + bestNetwork.name()); 2250 unlinger(bestNetwork); 2251 bestNetwork.addRequest(nri.request); 2252 mNetworkForRequestId.put(nri.request.requestId, bestNetwork); 2253 notifyNetworkCallback(bestNetwork, nri); 2254 if (nri.request.legacyType != TYPE_NONE) { 2255 mLegacyTypeTracker.add(nri.request.legacyType, bestNetwork); 2256 } 2257 } 2258 2259 if (nri.isRequest) { 2260 if (DBG) log("sending new NetworkRequest to factories"); 2261 final int score = bestNetwork == null ? 0 : bestNetwork.getCurrentScore(); 2262 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2263 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 2264 0, nri.request); 2265 } 2266 } 2267 } 2268 2269 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2270 int callingUid) { 2271 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2272 if (nri != null) { 2273 handleReleaseNetworkRequest(nri.request, callingUid); 2274 } 2275 } 2276 2277 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2278 // For validated Networks this is simply whether it is satsifying any NetworkRequests. 2279 // For unvalidated Networks this is whether it is satsifying any NetworkRequests or 2280 // were it to become validated, would it have a chance of satisfying any NetworkRequests. 2281 private boolean unneeded(NetworkAgentInfo nai) { 2282 if (!nai.created || nai.isVPN()) return false; 2283 boolean unneeded = true; 2284 if (nai.everValidated) { 2285 for (int i = 0; i < nai.networkRequests.size() && unneeded; i++) { 2286 final NetworkRequest nr = nai.networkRequests.valueAt(i); 2287 try { 2288 if (isRequest(nr)) unneeded = false; 2289 } catch (Exception e) { 2290 loge("Request " + nr + " not found in mNetworkRequests."); 2291 loge(" it came from request list of " + nai.name()); 2292 } 2293 } 2294 } else { 2295 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2296 // If this Network is already the highest scoring Network for a request, or if 2297 // there is hope for it to become one if it validated, then it is needed. 2298 if (nri.isRequest && nai.satisfies(nri.request) && 2299 (nai.networkRequests.get(nri.request.requestId) != null || 2300 // Note that this catches two important cases: 2301 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2302 // is currently satisfying the request. This is desirable when 2303 // cellular ends up validating but WiFi does not. 2304 // 2. Unvalidated WiFi will not be reaped when validated cellular 2305 // is currently satsifying the request. This is desirable when 2306 // WiFi ends up validating and out scoring cellular. 2307 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2308 nai.getCurrentScoreAsValidated())) { 2309 unneeded = false; 2310 break; 2311 } 2312 } 2313 } 2314 return unneeded; 2315 } 2316 2317 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2318 NetworkRequestInfo nri = mNetworkRequests.get(request); 2319 if (nri != null) { 2320 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2321 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2322 return; 2323 } 2324 if (DBG) log("releasing NetworkRequest " + request); 2325 nri.unlinkDeathRecipient(); 2326 mNetworkRequests.remove(request); 2327 if (nri.isRequest) { 2328 // Find all networks that are satisfying this request and remove the request 2329 // from their request lists. 2330 // TODO - it's my understanding that for a request there is only a single 2331 // network satisfying it, so this loop is wasteful 2332 boolean wasKept = false; 2333 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2334 if (nai.networkRequests.get(nri.request.requestId) != null) { 2335 nai.networkRequests.remove(nri.request.requestId); 2336 if (DBG) { 2337 log(" Removing from current network " + nai.name() + 2338 ", leaving " + nai.networkRequests.size() + 2339 " requests."); 2340 } 2341 if (unneeded(nai)) { 2342 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2343 teardownUnneededNetwork(nai); 2344 } else { 2345 // suspect there should only be one pass through here 2346 // but if any were kept do the check below 2347 wasKept |= true; 2348 } 2349 } 2350 } 2351 2352 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2353 if (nai != null) { 2354 mNetworkForRequestId.remove(nri.request.requestId); 2355 } 2356 // Maintain the illusion. When this request arrived, we might have pretended 2357 // that a network connected to serve it, even though the network was already 2358 // connected. Now that this request has gone away, we might have to pretend 2359 // that the network disconnected. LegacyTypeTracker will generate that 2360 // phantom disconnect for this type. 2361 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2362 boolean doRemove = true; 2363 if (wasKept) { 2364 // check if any of the remaining requests for this network are for the 2365 // same legacy type - if so, don't remove the nai 2366 for (int i = 0; i < nai.networkRequests.size(); i++) { 2367 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2368 if (otherRequest.legacyType == nri.request.legacyType && 2369 isRequest(otherRequest)) { 2370 if (DBG) log(" still have other legacy request - leaving"); 2371 doRemove = false; 2372 } 2373 } 2374 } 2375 2376 if (doRemove) { 2377 mLegacyTypeTracker.remove(nri.request.legacyType, nai); 2378 } 2379 } 2380 2381 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2382 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2383 nri.request); 2384 } 2385 } else { 2386 // listens don't have a singular affectedNetwork. Check all networks to see 2387 // if this listen request applies and remove it. 2388 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2389 nai.networkRequests.remove(nri.request.requestId); 2390 } 2391 } 2392 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2393 } 2394 } 2395 2396 private class InternalHandler extends Handler { 2397 public InternalHandler(Looper looper) { 2398 super(looper); 2399 } 2400 2401 @Override 2402 public void handleMessage(Message msg) { 2403 switch (msg.what) { 2404 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2405 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2406 String causedBy = null; 2407 synchronized (ConnectivityService.this) { 2408 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2409 mNetTransitionWakeLock.isHeld()) { 2410 mNetTransitionWakeLock.release(); 2411 causedBy = mNetTransitionWakeLockCausedBy; 2412 } else { 2413 break; 2414 } 2415 } 2416 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2417 log("Failed to find a new network - expiring NetTransition Wakelock"); 2418 } else { 2419 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2420 " cleared because we found a replacement network"); 2421 } 2422 break; 2423 } 2424 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2425 handleDeprecatedGlobalHttpProxy(); 2426 break; 2427 } 2428 case EVENT_SET_DEPENDENCY_MET: { 2429 boolean met = (msg.arg1 == ENABLED); 2430 handleSetDependencyMet(msg.arg2, met); 2431 break; 2432 } 2433 case EVENT_SEND_STICKY_BROADCAST_INTENT: { 2434 Intent intent = (Intent)msg.obj; 2435 sendStickyBroadcast(intent); 2436 break; 2437 } 2438 case EVENT_ENABLE_FAIL_FAST_MOBILE_DATA: { 2439 int tag = mEnableFailFastMobileDataTag.get(); 2440 if (msg.arg1 == tag) { 2441 MobileDataStateTracker mobileDst = 2442 (MobileDataStateTracker) mNetTrackers[ConnectivityManager.TYPE_MOBILE]; 2443 if (mobileDst != null) { 2444 mobileDst.setEnableFailFastMobileData(msg.arg2); 2445 } 2446 } else { 2447 log("EVENT_ENABLE_FAIL_FAST_MOBILE_DATA: stale arg1:" + msg.arg1 2448 + " != tag:" + tag); 2449 } 2450 break; 2451 } 2452 case EVENT_SAMPLE_INTERVAL_ELAPSED: { 2453 handleNetworkSamplingTimeout(); 2454 break; 2455 } 2456 case EVENT_PROXY_HAS_CHANGED: { 2457 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2458 break; 2459 } 2460 case EVENT_REGISTER_NETWORK_FACTORY: { 2461 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2462 break; 2463 } 2464 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2465 handleUnregisterNetworkFactory((Messenger)msg.obj); 2466 break; 2467 } 2468 case EVENT_REGISTER_NETWORK_AGENT: { 2469 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2470 break; 2471 } 2472 case EVENT_REGISTER_NETWORK_REQUEST: 2473 case EVENT_REGISTER_NETWORK_LISTENER: { 2474 handleRegisterNetworkRequest(msg); 2475 break; 2476 } 2477 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: { 2478 handleRegisterNetworkRequestWithIntent(msg); 2479 break; 2480 } 2481 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2482 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2483 break; 2484 } 2485 case EVENT_RELEASE_NETWORK_REQUEST: { 2486 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2487 break; 2488 } 2489 case EVENT_SYSTEM_READY: { 2490 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2491 nai.networkMonitor.systemReady = true; 2492 } 2493 break; 2494 } 2495 } 2496 } 2497 } 2498 2499 // javadoc from interface 2500 public int tether(String iface) { 2501 ConnectivityManager.enforceTetherChangePermission(mContext); 2502 if (isTetheringSupported()) { 2503 return mTethering.tether(iface); 2504 } else { 2505 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2506 } 2507 } 2508 2509 // javadoc from interface 2510 public int untether(String iface) { 2511 ConnectivityManager.enforceTetherChangePermission(mContext); 2512 2513 if (isTetheringSupported()) { 2514 return mTethering.untether(iface); 2515 } else { 2516 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2517 } 2518 } 2519 2520 // javadoc from interface 2521 public int getLastTetherError(String iface) { 2522 enforceTetherAccessPermission(); 2523 2524 if (isTetheringSupported()) { 2525 return mTethering.getLastTetherError(iface); 2526 } else { 2527 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2528 } 2529 } 2530 2531 // TODO - proper iface API for selection by property, inspection, etc 2532 public String[] getTetherableUsbRegexs() { 2533 enforceTetherAccessPermission(); 2534 if (isTetheringSupported()) { 2535 return mTethering.getTetherableUsbRegexs(); 2536 } else { 2537 return new String[0]; 2538 } 2539 } 2540 2541 public String[] getTetherableWifiRegexs() { 2542 enforceTetherAccessPermission(); 2543 if (isTetheringSupported()) { 2544 return mTethering.getTetherableWifiRegexs(); 2545 } else { 2546 return new String[0]; 2547 } 2548 } 2549 2550 public String[] getTetherableBluetoothRegexs() { 2551 enforceTetherAccessPermission(); 2552 if (isTetheringSupported()) { 2553 return mTethering.getTetherableBluetoothRegexs(); 2554 } else { 2555 return new String[0]; 2556 } 2557 } 2558 2559 public int setUsbTethering(boolean enable) { 2560 ConnectivityManager.enforceTetherChangePermission(mContext); 2561 if (isTetheringSupported()) { 2562 return mTethering.setUsbTethering(enable); 2563 } else { 2564 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2565 } 2566 } 2567 2568 // TODO - move iface listing, queries, etc to new module 2569 // javadoc from interface 2570 public String[] getTetherableIfaces() { 2571 enforceTetherAccessPermission(); 2572 return mTethering.getTetherableIfaces(); 2573 } 2574 2575 public String[] getTetheredIfaces() { 2576 enforceTetherAccessPermission(); 2577 return mTethering.getTetheredIfaces(); 2578 } 2579 2580 public String[] getTetheringErroredIfaces() { 2581 enforceTetherAccessPermission(); 2582 return mTethering.getErroredIfaces(); 2583 } 2584 2585 public String[] getTetheredDhcpRanges() { 2586 enforceConnectivityInternalPermission(); 2587 return mTethering.getTetheredDhcpRanges(); 2588 } 2589 2590 // if ro.tether.denied = true we default to no tethering 2591 // gservices could set the secure setting to 1 though to enable it on a build where it 2592 // had previously been turned off. 2593 public boolean isTetheringSupported() { 2594 enforceTetherAccessPermission(); 2595 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2596 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2597 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2598 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2599 return tetherEnabledInSettings && ((mTethering.getTetherableUsbRegexs().length != 0 || 2600 mTethering.getTetherableWifiRegexs().length != 0 || 2601 mTethering.getTetherableBluetoothRegexs().length != 0) && 2602 mTethering.getUpstreamIfaceTypes().length != 0); 2603 } 2604 2605 // Called when we lose the default network and have no replacement yet. 2606 // This will automatically be cleared after X seconds or a new default network 2607 // becomes CONNECTED, whichever happens first. The timer is started by the 2608 // first caller and not restarted by subsequent callers. 2609 private void requestNetworkTransitionWakelock(String forWhom) { 2610 int serialNum = 0; 2611 synchronized (this) { 2612 if (mNetTransitionWakeLock.isHeld()) return; 2613 serialNum = ++mNetTransitionWakeLockSerialNumber; 2614 mNetTransitionWakeLock.acquire(); 2615 mNetTransitionWakeLockCausedBy = forWhom; 2616 } 2617 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2618 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2619 mNetTransitionWakeLockTimeout); 2620 return; 2621 } 2622 2623 // 100 percent is full good, 0 is full bad. 2624 public void reportInetCondition(int networkType, int percentage) { 2625 if (percentage > 50) return; // don't handle good network reports 2626 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2627 if (nai != null) reportBadNetwork(nai.network); 2628 } 2629 2630 public void reportBadNetwork(Network network) { 2631 enforceAccessPermission(); 2632 enforceInternetPermission(); 2633 2634 if (network == null) return; 2635 2636 final int uid = Binder.getCallingUid(); 2637 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2638 if (nai == null) return; 2639 if (DBG) log("reportBadNetwork(" + nai.name() + ") by " + uid); 2640 synchronized (nai) { 2641 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2642 // which isn't meant to work on uncreated networks. 2643 if (!nai.created) return; 2644 2645 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2646 2647 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2648 } 2649 } 2650 2651 public ProxyInfo getDefaultProxy() { 2652 // this information is already available as a world read/writable jvm property 2653 // so this API change wouldn't have a benifit. It also breaks the passing 2654 // of proxy info to all the JVMs. 2655 // enforceAccessPermission(); 2656 synchronized (mProxyLock) { 2657 ProxyInfo ret = mGlobalProxy; 2658 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2659 return ret; 2660 } 2661 } 2662 2663 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2664 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2665 // proxy is null then there is no proxy in place). 2666 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2667 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2668 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2669 proxy = null; 2670 } 2671 return proxy; 2672 } 2673 2674 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2675 // better for determining if a new proxy broadcast is necessary: 2676 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2677 // avoid unnecessary broadcasts. 2678 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2679 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2680 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2681 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2682 // all set. 2683 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2684 a = canonicalizeProxyInfo(a); 2685 b = canonicalizeProxyInfo(b); 2686 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2687 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2688 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2689 } 2690 2691 public void setGlobalProxy(ProxyInfo proxyProperties) { 2692 enforceConnectivityInternalPermission(); 2693 2694 synchronized (mProxyLock) { 2695 if (proxyProperties == mGlobalProxy) return; 2696 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2697 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2698 2699 String host = ""; 2700 int port = 0; 2701 String exclList = ""; 2702 String pacFileUrl = ""; 2703 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2704 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2705 if (!proxyProperties.isValid()) { 2706 if (DBG) 2707 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2708 return; 2709 } 2710 mGlobalProxy = new ProxyInfo(proxyProperties); 2711 host = mGlobalProxy.getHost(); 2712 port = mGlobalProxy.getPort(); 2713 exclList = mGlobalProxy.getExclusionListAsString(); 2714 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2715 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2716 } 2717 } else { 2718 mGlobalProxy = null; 2719 } 2720 ContentResolver res = mContext.getContentResolver(); 2721 final long token = Binder.clearCallingIdentity(); 2722 try { 2723 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2724 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2725 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2726 exclList); 2727 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2728 } finally { 2729 Binder.restoreCallingIdentity(token); 2730 } 2731 2732 if (mGlobalProxy == null) { 2733 proxyProperties = mDefaultProxy; 2734 } 2735 sendProxyBroadcast(proxyProperties); 2736 } 2737 } 2738 2739 private void loadGlobalProxy() { 2740 ContentResolver res = mContext.getContentResolver(); 2741 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2742 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2743 String exclList = Settings.Global.getString(res, 2744 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2745 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2746 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2747 ProxyInfo proxyProperties; 2748 if (!TextUtils.isEmpty(pacFileUrl)) { 2749 proxyProperties = new ProxyInfo(pacFileUrl); 2750 } else { 2751 proxyProperties = new ProxyInfo(host, port, exclList); 2752 } 2753 if (!proxyProperties.isValid()) { 2754 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2755 return; 2756 } 2757 2758 synchronized (mProxyLock) { 2759 mGlobalProxy = proxyProperties; 2760 } 2761 } 2762 } 2763 2764 public ProxyInfo getGlobalProxy() { 2765 // this information is already available as a world read/writable jvm property 2766 // so this API change wouldn't have a benifit. It also breaks the passing 2767 // of proxy info to all the JVMs. 2768 // enforceAccessPermission(); 2769 synchronized (mProxyLock) { 2770 return mGlobalProxy; 2771 } 2772 } 2773 2774 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2775 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2776 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2777 proxy = null; 2778 } 2779 synchronized (mProxyLock) { 2780 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2781 if (mDefaultProxy == proxy) return; // catches repeated nulls 2782 if (proxy != null && !proxy.isValid()) { 2783 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2784 return; 2785 } 2786 2787 // This call could be coming from the PacManager, containing the port of the local 2788 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2789 // global (to get the correct local port), and send a broadcast. 2790 // TODO: Switch PacManager to have its own message to send back rather than 2791 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2792 if ((mGlobalProxy != null) && (proxy != null) 2793 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2794 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2795 mGlobalProxy = proxy; 2796 sendProxyBroadcast(mGlobalProxy); 2797 return; 2798 } 2799 mDefaultProxy = proxy; 2800 2801 if (mGlobalProxy != null) return; 2802 if (!mDefaultProxyDisabled) { 2803 sendProxyBroadcast(proxy); 2804 } 2805 } 2806 } 2807 2808 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2809 // This method gets called when any network changes proxy, but the broadcast only ever contains 2810 // the default proxy (even if it hasn't changed). 2811 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2812 // world where an app might be bound to a non-default network. 2813 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2814 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2815 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2816 2817 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2818 sendProxyBroadcast(getDefaultProxy()); 2819 } 2820 } 2821 2822 private void handleDeprecatedGlobalHttpProxy() { 2823 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2824 Settings.Global.HTTP_PROXY); 2825 if (!TextUtils.isEmpty(proxy)) { 2826 String data[] = proxy.split(":"); 2827 if (data.length == 0) { 2828 return; 2829 } 2830 2831 String proxyHost = data[0]; 2832 int proxyPort = 8080; 2833 if (data.length > 1) { 2834 try { 2835 proxyPort = Integer.parseInt(data[1]); 2836 } catch (NumberFormatException e) { 2837 return; 2838 } 2839 } 2840 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2841 setGlobalProxy(p); 2842 } 2843 } 2844 2845 private void sendProxyBroadcast(ProxyInfo proxy) { 2846 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2847 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2848 if (DBG) log("sending Proxy Broadcast for " + proxy); 2849 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2850 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2851 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2852 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2853 final long ident = Binder.clearCallingIdentity(); 2854 try { 2855 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2856 } finally { 2857 Binder.restoreCallingIdentity(ident); 2858 } 2859 } 2860 2861 private static class SettingsObserver extends ContentObserver { 2862 private int mWhat; 2863 private Handler mHandler; 2864 SettingsObserver(Handler handler, int what) { 2865 super(handler); 2866 mHandler = handler; 2867 mWhat = what; 2868 } 2869 2870 void observe(Context context) { 2871 ContentResolver resolver = context.getContentResolver(); 2872 resolver.registerContentObserver(Settings.Global.getUriFor( 2873 Settings.Global.HTTP_PROXY), false, this); 2874 } 2875 2876 @Override 2877 public void onChange(boolean selfChange) { 2878 mHandler.obtainMessage(mWhat).sendToTarget(); 2879 } 2880 } 2881 2882 private static void log(String s) { 2883 Slog.d(TAG, s); 2884 } 2885 2886 private static void loge(String s) { 2887 Slog.e(TAG, s); 2888 } 2889 2890 private static <T> T checkNotNull(T value, String message) { 2891 if (value == null) { 2892 throw new NullPointerException(message); 2893 } 2894 return value; 2895 } 2896 2897 /** 2898 * Prepare for a VPN application. 2899 * Permissions are checked in Vpn class. 2900 * @hide 2901 */ 2902 @Override 2903 public boolean prepareVpn(String oldPackage, String newPackage) { 2904 throwIfLockdownEnabled(); 2905 int user = UserHandle.getUserId(Binder.getCallingUid()); 2906 synchronized(mVpns) { 2907 return mVpns.get(user).prepare(oldPackage, newPackage); 2908 } 2909 } 2910 2911 /** 2912 * Set whether the current VPN package has the ability to launch VPNs without 2913 * user intervention. This method is used by system-privileged apps. 2914 * Permissions are checked in Vpn class. 2915 * @hide 2916 */ 2917 @Override 2918 public void setVpnPackageAuthorization(boolean authorized) { 2919 int user = UserHandle.getUserId(Binder.getCallingUid()); 2920 synchronized(mVpns) { 2921 mVpns.get(user).setPackageAuthorization(authorized); 2922 } 2923 } 2924 2925 /** 2926 * Configure a TUN interface and return its file descriptor. Parameters 2927 * are encoded and opaque to this class. This method is used by VpnBuilder 2928 * and not available in ConnectivityManager. Permissions are checked in 2929 * Vpn class. 2930 * @hide 2931 */ 2932 @Override 2933 public ParcelFileDescriptor establishVpn(VpnConfig config) { 2934 throwIfLockdownEnabled(); 2935 int user = UserHandle.getUserId(Binder.getCallingUid()); 2936 synchronized(mVpns) { 2937 return mVpns.get(user).establish(config); 2938 } 2939 } 2940 2941 /** 2942 * Start legacy VPN, controlling native daemons as needed. Creates a 2943 * secondary thread to perform connection work, returning quickly. 2944 */ 2945 @Override 2946 public void startLegacyVpn(VpnProfile profile) { 2947 throwIfLockdownEnabled(); 2948 final LinkProperties egress = getActiveLinkProperties(); 2949 if (egress == null) { 2950 throw new IllegalStateException("Missing active network connection"); 2951 } 2952 int user = UserHandle.getUserId(Binder.getCallingUid()); 2953 synchronized(mVpns) { 2954 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 2955 } 2956 } 2957 2958 /** 2959 * Return the information of the ongoing legacy VPN. This method is used 2960 * by VpnSettings and not available in ConnectivityManager. Permissions 2961 * are checked in Vpn class. 2962 * @hide 2963 */ 2964 @Override 2965 public LegacyVpnInfo getLegacyVpnInfo() { 2966 throwIfLockdownEnabled(); 2967 int user = UserHandle.getUserId(Binder.getCallingUid()); 2968 synchronized(mVpns) { 2969 return mVpns.get(user).getLegacyVpnInfo(); 2970 } 2971 } 2972 2973 /** 2974 * Returns the information of the ongoing VPN. This method is used by VpnDialogs and 2975 * not available in ConnectivityManager. 2976 * Permissions are checked in Vpn class. 2977 * @hide 2978 */ 2979 @Override 2980 public VpnConfig getVpnConfig() { 2981 int user = UserHandle.getUserId(Binder.getCallingUid()); 2982 synchronized(mVpns) { 2983 return mVpns.get(user).getVpnConfig(); 2984 } 2985 } 2986 2987 @Override 2988 public boolean updateLockdownVpn() { 2989 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 2990 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 2991 return false; 2992 } 2993 2994 // Tear down existing lockdown if profile was removed 2995 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 2996 if (mLockdownEnabled) { 2997 if (!mKeyStore.isUnlocked()) { 2998 Slog.w(TAG, "KeyStore locked; unable to create LockdownTracker"); 2999 return false; 3000 } 3001 3002 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3003 final VpnProfile profile = VpnProfile.decode( 3004 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3005 int user = UserHandle.getUserId(Binder.getCallingUid()); 3006 synchronized(mVpns) { 3007 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, mVpns.get(user), 3008 profile)); 3009 } 3010 } else { 3011 setLockdownTracker(null); 3012 } 3013 3014 return true; 3015 } 3016 3017 /** 3018 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3019 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3020 */ 3021 private void setLockdownTracker(LockdownVpnTracker tracker) { 3022 // Shutdown any existing tracker 3023 final LockdownVpnTracker existing = mLockdownTracker; 3024 mLockdownTracker = null; 3025 if (existing != null) { 3026 existing.shutdown(); 3027 } 3028 3029 try { 3030 if (tracker != null) { 3031 mNetd.setFirewallEnabled(true); 3032 mNetd.setFirewallInterfaceRule("lo", true); 3033 mLockdownTracker = tracker; 3034 mLockdownTracker.init(); 3035 } else { 3036 mNetd.setFirewallEnabled(false); 3037 } 3038 } catch (RemoteException e) { 3039 // ignored; NMS lives inside system_server 3040 } 3041 } 3042 3043 private void throwIfLockdownEnabled() { 3044 if (mLockdownEnabled) { 3045 throw new IllegalStateException("Unavailable in lockdown mode"); 3046 } 3047 } 3048 3049 public void supplyMessenger(int networkType, Messenger messenger) { 3050 enforceConnectivityInternalPermission(); 3051 3052 if (isNetworkTypeValid(networkType) && mNetTrackers[networkType] != null) { 3053 mNetTrackers[networkType].supplyMessenger(messenger); 3054 } 3055 } 3056 3057 public int findConnectionTypeForIface(String iface) { 3058 enforceConnectivityInternalPermission(); 3059 3060 if (TextUtils.isEmpty(iface)) return ConnectivityManager.TYPE_NONE; 3061 3062 synchronized(mNetworkForNetId) { 3063 for (int i = 0; i < mNetworkForNetId.size(); i++) { 3064 NetworkAgentInfo nai = mNetworkForNetId.valueAt(i); 3065 LinkProperties lp = nai.linkProperties; 3066 if (lp != null && iface.equals(lp.getInterfaceName()) && nai.networkInfo != null) { 3067 return nai.networkInfo.getType(); 3068 } 3069 } 3070 } 3071 return ConnectivityManager.TYPE_NONE; 3072 } 3073 3074 /** 3075 * Have mobile data fail fast if enabled. 3076 * 3077 * @param enabled DctConstants.ENABLED/DISABLED 3078 */ 3079 private void setEnableFailFastMobileData(int enabled) { 3080 int tag; 3081 3082 if (enabled == DctConstants.ENABLED) { 3083 tag = mEnableFailFastMobileDataTag.incrementAndGet(); 3084 } else { 3085 tag = mEnableFailFastMobileDataTag.get(); 3086 } 3087 mHandler.sendMessage(mHandler.obtainMessage(EVENT_ENABLE_FAIL_FAST_MOBILE_DATA, tag, 3088 enabled)); 3089 } 3090 3091 @Override 3092 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3093 // TODO: Remove? Any reason to trigger a provisioning check? 3094 return -1; 3095 } 3096 3097 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3098 private volatile boolean mIsNotificationVisible = false; 3099 3100 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3101 if (DBG) { 3102 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3103 + " action=" + action); 3104 } 3105 Intent intent = new Intent(action); 3106 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3107 // Concatenate the range of types onto the range of NetIDs. 3108 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3109 setProvNotificationVisibleIntent(visible, id, networkType, null, pendingIntent); 3110 } 3111 3112 /** 3113 * Show or hide network provisioning notificaitons. 3114 * 3115 * @param id an identifier that uniquely identifies this notification. This must match 3116 * between show and hide calls. We use the NetID value but for legacy callers 3117 * we concatenate the range of types with the range of NetIDs. 3118 */ 3119 private void setProvNotificationVisibleIntent(boolean visible, int id, int networkType, 3120 String extraInfo, PendingIntent intent) { 3121 if (DBG) { 3122 log("setProvNotificationVisibleIntent: E visible=" + visible + " networkType=" + 3123 networkType + " extraInfo=" + extraInfo); 3124 } 3125 3126 Resources r = Resources.getSystem(); 3127 NotificationManager notificationManager = (NotificationManager) mContext 3128 .getSystemService(Context.NOTIFICATION_SERVICE); 3129 3130 if (visible) { 3131 CharSequence title; 3132 CharSequence details; 3133 int icon; 3134 Notification notification = new Notification(); 3135 switch (networkType) { 3136 case ConnectivityManager.TYPE_WIFI: 3137 title = r.getString(R.string.wifi_available_sign_in, 0); 3138 details = r.getString(R.string.network_available_sign_in_detailed, 3139 extraInfo); 3140 icon = R.drawable.stat_notify_wifi_in_range; 3141 break; 3142 case ConnectivityManager.TYPE_MOBILE: 3143 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3144 title = r.getString(R.string.network_available_sign_in, 0); 3145 // TODO: Change this to pull from NetworkInfo once a printable 3146 // name has been added to it 3147 details = mTelephonyManager.getNetworkOperatorName(); 3148 icon = R.drawable.stat_notify_rssi_in_range; 3149 break; 3150 default: 3151 title = r.getString(R.string.network_available_sign_in, 0); 3152 details = r.getString(R.string.network_available_sign_in_detailed, 3153 extraInfo); 3154 icon = R.drawable.stat_notify_rssi_in_range; 3155 break; 3156 } 3157 3158 notification.when = 0; 3159 notification.icon = icon; 3160 notification.flags = Notification.FLAG_AUTO_CANCEL; 3161 notification.tickerText = title; 3162 notification.color = mContext.getResources().getColor( 3163 com.android.internal.R.color.system_notification_accent_color); 3164 notification.setLatestEventInfo(mContext, title, details, notification.contentIntent); 3165 notification.contentIntent = intent; 3166 3167 try { 3168 notificationManager.notify(NOTIFICATION_ID, id, notification); 3169 } catch (NullPointerException npe) { 3170 loge("setNotificaitionVisible: visible notificationManager npe=" + npe); 3171 npe.printStackTrace(); 3172 } 3173 } else { 3174 try { 3175 notificationManager.cancel(NOTIFICATION_ID, id); 3176 } catch (NullPointerException npe) { 3177 loge("setNotificaitionVisible: cancel notificationManager npe=" + npe); 3178 npe.printStackTrace(); 3179 } 3180 } 3181 mIsNotificationVisible = visible; 3182 } 3183 3184 /** Location to an updatable file listing carrier provisioning urls. 3185 * An example: 3186 * 3187 * <?xml version="1.0" encoding="utf-8"?> 3188 * <provisioningUrls> 3189 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3190 * <redirectedUrl mcc="310" mnc="4">http://www.google.com</redirectedUrl> 3191 * </provisioningUrls> 3192 */ 3193 private static final String PROVISIONING_URL_PATH = 3194 "/data/misc/radio/provisioning_urls.xml"; 3195 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3196 3197 /** XML tag for root element. */ 3198 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3199 /** XML tag for individual url */ 3200 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3201 /** XML tag for redirected url */ 3202 private static final String TAG_REDIRECTED_URL = "redirectedUrl"; 3203 /** XML attribute for mcc */ 3204 private static final String ATTR_MCC = "mcc"; 3205 /** XML attribute for mnc */ 3206 private static final String ATTR_MNC = "mnc"; 3207 3208 private static final int REDIRECTED_PROVISIONING = 1; 3209 private static final int PROVISIONING = 2; 3210 3211 private String getProvisioningUrlBaseFromFile(int type) { 3212 FileReader fileReader = null; 3213 XmlPullParser parser = null; 3214 Configuration config = mContext.getResources().getConfiguration(); 3215 String tagType; 3216 3217 switch (type) { 3218 case PROVISIONING: 3219 tagType = TAG_PROVISIONING_URL; 3220 break; 3221 case REDIRECTED_PROVISIONING: 3222 tagType = TAG_REDIRECTED_URL; 3223 break; 3224 default: 3225 throw new RuntimeException("getProvisioningUrlBaseFromFile: Unexpected parameter " + 3226 type); 3227 } 3228 3229 try { 3230 fileReader = new FileReader(mProvisioningUrlFile); 3231 parser = Xml.newPullParser(); 3232 parser.setInput(fileReader); 3233 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3234 3235 while (true) { 3236 XmlUtils.nextElement(parser); 3237 3238 String element = parser.getName(); 3239 if (element == null) break; 3240 3241 if (element.equals(tagType)) { 3242 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3243 try { 3244 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3245 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3246 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3247 parser.next(); 3248 if (parser.getEventType() == XmlPullParser.TEXT) { 3249 return parser.getText(); 3250 } 3251 } 3252 } 3253 } catch (NumberFormatException e) { 3254 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3255 } 3256 } 3257 } 3258 return null; 3259 } catch (FileNotFoundException e) { 3260 loge("Carrier Provisioning Urls file not found"); 3261 } catch (XmlPullParserException e) { 3262 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3263 } catch (IOException e) { 3264 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3265 } finally { 3266 if (fileReader != null) { 3267 try { 3268 fileReader.close(); 3269 } catch (IOException e) {} 3270 } 3271 } 3272 return null; 3273 } 3274 3275 @Override 3276 public String getMobileRedirectedProvisioningUrl() { 3277 enforceConnectivityInternalPermission(); 3278 String url = getProvisioningUrlBaseFromFile(REDIRECTED_PROVISIONING); 3279 if (TextUtils.isEmpty(url)) { 3280 url = mContext.getResources().getString(R.string.mobile_redirected_provisioning_url); 3281 } 3282 return url; 3283 } 3284 3285 @Override 3286 public String getMobileProvisioningUrl() { 3287 enforceConnectivityInternalPermission(); 3288 String url = getProvisioningUrlBaseFromFile(PROVISIONING); 3289 if (TextUtils.isEmpty(url)) { 3290 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3291 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3292 } else { 3293 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3294 } 3295 // populate the iccid, imei and phone number in the provisioning url. 3296 if (!TextUtils.isEmpty(url)) { 3297 String phoneNumber = mTelephonyManager.getLine1Number(); 3298 if (TextUtils.isEmpty(phoneNumber)) { 3299 phoneNumber = "0000000000"; 3300 } 3301 url = String.format(url, 3302 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3303 mTelephonyManager.getDeviceId() /* IMEI */, 3304 phoneNumber /* Phone numer */); 3305 } 3306 3307 return url; 3308 } 3309 3310 @Override 3311 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3312 String action) { 3313 enforceConnectivityInternalPermission(); 3314 final long ident = Binder.clearCallingIdentity(); 3315 try { 3316 setProvNotificationVisible(visible, networkType, action); 3317 } finally { 3318 Binder.restoreCallingIdentity(ident); 3319 } 3320 } 3321 3322 @Override 3323 public void setAirplaneMode(boolean enable) { 3324 enforceConnectivityInternalPermission(); 3325 final long ident = Binder.clearCallingIdentity(); 3326 try { 3327 final ContentResolver cr = mContext.getContentResolver(); 3328 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3329 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3330 intent.putExtra("state", enable); 3331 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3332 } finally { 3333 Binder.restoreCallingIdentity(ident); 3334 } 3335 } 3336 3337 private void onUserStart(int userId) { 3338 synchronized(mVpns) { 3339 Vpn userVpn = mVpns.get(userId); 3340 if (userVpn != null) { 3341 loge("Starting user already has a VPN"); 3342 return; 3343 } 3344 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, this, userId); 3345 mVpns.put(userId, userVpn); 3346 } 3347 } 3348 3349 private void onUserStop(int userId) { 3350 synchronized(mVpns) { 3351 Vpn userVpn = mVpns.get(userId); 3352 if (userVpn == null) { 3353 loge("Stopping user has no VPN"); 3354 return; 3355 } 3356 mVpns.delete(userId); 3357 } 3358 } 3359 3360 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3361 @Override 3362 public void onReceive(Context context, Intent intent) { 3363 final String action = intent.getAction(); 3364 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3365 if (userId == UserHandle.USER_NULL) return; 3366 3367 if (Intent.ACTION_USER_STARTING.equals(action)) { 3368 onUserStart(userId); 3369 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3370 onUserStop(userId); 3371 } 3372 } 3373 }; 3374 3375 /* Infrastructure for network sampling */ 3376 3377 private void handleNetworkSamplingTimeout() { 3378 3379 if (SAMPLE_DBG) log("Sampling interval elapsed, updating statistics .."); 3380 3381 // initialize list of interfaces .. 3382 Map<String, SamplingDataTracker.SamplingSnapshot> mapIfaceToSample = 3383 new HashMap<String, SamplingDataTracker.SamplingSnapshot>(); 3384 for (NetworkStateTracker tracker : mNetTrackers) { 3385 if (tracker != null) { 3386 String ifaceName = tracker.getNetworkInterfaceName(); 3387 if (ifaceName != null) { 3388 mapIfaceToSample.put(ifaceName, null); 3389 } 3390 } 3391 } 3392 3393 // Read samples for all interfaces 3394 SamplingDataTracker.getSamplingSnapshots(mapIfaceToSample); 3395 3396 // process samples for all networks 3397 for (NetworkStateTracker tracker : mNetTrackers) { 3398 if (tracker != null) { 3399 String ifaceName = tracker.getNetworkInterfaceName(); 3400 SamplingDataTracker.SamplingSnapshot ss = mapIfaceToSample.get(ifaceName); 3401 if (ss != null) { 3402 // end the previous sampling cycle 3403 tracker.stopSampling(ss); 3404 // start a new sampling cycle .. 3405 tracker.startSampling(ss); 3406 } 3407 } 3408 } 3409 3410 if (SAMPLE_DBG) log("Done."); 3411 3412 int samplingIntervalInSeconds = Settings.Global.getInt(mContext.getContentResolver(), 3413 Settings.Global.CONNECTIVITY_SAMPLING_INTERVAL_IN_SECONDS, 3414 DEFAULT_SAMPLING_INTERVAL_IN_SECONDS); 3415 3416 if (SAMPLE_DBG) { 3417 log("Setting timer for " + String.valueOf(samplingIntervalInSeconds) + "seconds"); 3418 } 3419 3420 setAlarm(samplingIntervalInSeconds * 1000, mSampleIntervalElapsedIntent); 3421 } 3422 3423 /** 3424 * Sets a network sampling alarm. 3425 */ 3426 void setAlarm(int timeoutInMilliseconds, PendingIntent intent) { 3427 long wakeupTime = SystemClock.elapsedRealtime() + timeoutInMilliseconds; 3428 int alarmType; 3429 if (Resources.getSystem().getBoolean( 3430 R.bool.config_networkSamplingWakesDevice)) { 3431 alarmType = AlarmManager.ELAPSED_REALTIME_WAKEUP; 3432 } else { 3433 alarmType = AlarmManager.ELAPSED_REALTIME; 3434 } 3435 mAlarmManager.set(alarmType, wakeupTime, intent); 3436 } 3437 3438 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3439 new HashMap<Messenger, NetworkFactoryInfo>(); 3440 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3441 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3442 3443 private static class NetworkFactoryInfo { 3444 public final String name; 3445 public final Messenger messenger; 3446 public final AsyncChannel asyncChannel; 3447 3448 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3449 this.name = name; 3450 this.messenger = messenger; 3451 this.asyncChannel = asyncChannel; 3452 } 3453 } 3454 3455 /** 3456 * Tracks info about the requester. 3457 * Also used to notice when the calling process dies so we can self-expire 3458 */ 3459 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3460 static final boolean REQUEST = true; 3461 static final boolean LISTEN = false; 3462 3463 final NetworkRequest request; 3464 final PendingIntent mPendingIntent; 3465 boolean mPendingIntentSent; 3466 private final IBinder mBinder; 3467 final int mPid; 3468 final int mUid; 3469 final Messenger messenger; 3470 final boolean isRequest; 3471 3472 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, boolean isRequest) { 3473 request = r; 3474 mPendingIntent = pi; 3475 messenger = null; 3476 mBinder = null; 3477 mPid = getCallingPid(); 3478 mUid = getCallingUid(); 3479 this.isRequest = isRequest; 3480 } 3481 3482 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, boolean isRequest) { 3483 super(); 3484 messenger = m; 3485 request = r; 3486 mBinder = binder; 3487 mPid = getCallingPid(); 3488 mUid = getCallingUid(); 3489 this.isRequest = isRequest; 3490 mPendingIntent = null; 3491 3492 try { 3493 mBinder.linkToDeath(this, 0); 3494 } catch (RemoteException e) { 3495 binderDied(); 3496 } 3497 } 3498 3499 void unlinkDeathRecipient() { 3500 if (mBinder != null) { 3501 mBinder.unlinkToDeath(this, 0); 3502 } 3503 } 3504 3505 public void binderDied() { 3506 log("ConnectivityService NetworkRequestInfo binderDied(" + 3507 request + ", " + mBinder + ")"); 3508 releaseNetworkRequest(request); 3509 } 3510 3511 public String toString() { 3512 return (isRequest ? "Request" : "Listen") + " from uid/pid:" + mUid + "/" + 3513 mPid + " for " + request + 3514 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3515 } 3516 } 3517 3518 @Override 3519 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3520 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3521 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3522 enforceNetworkRequestPermissions(networkCapabilities); 3523 enforceMeteredApnPolicy(networkCapabilities); 3524 3525 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3526 throw new IllegalArgumentException("Bad timeout specified"); 3527 } 3528 3529 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3530 nextNetworkRequestId()); 3531 if (DBG) log("requestNetwork for " + networkRequest); 3532 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3533 NetworkRequestInfo.REQUEST); 3534 3535 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3536 if (timeoutMs > 0) { 3537 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3538 nri), timeoutMs); 3539 } 3540 return networkRequest; 3541 } 3542 3543 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3544 if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED) 3545 == false) { 3546 enforceConnectivityInternalPermission(); 3547 } else { 3548 enforceChangePermission(); 3549 } 3550 } 3551 3552 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3553 // if UID is restricted, don't allow them to bring up metered APNs 3554 if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED) 3555 == false) { 3556 final int uidRules; 3557 final int uid = Binder.getCallingUid(); 3558 synchronized(mRulesLock) { 3559 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3560 } 3561 if ((uidRules & RULE_REJECT_METERED) != 0) { 3562 // we could silently fail or we can filter the available nets to only give 3563 // them those they have access to. Chose the more useful 3564 networkCapabilities.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED); 3565 } 3566 } 3567 } 3568 3569 @Override 3570 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3571 PendingIntent operation) { 3572 checkNotNull(operation, "PendingIntent cannot be null."); 3573 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3574 enforceNetworkRequestPermissions(networkCapabilities); 3575 enforceMeteredApnPolicy(networkCapabilities); 3576 3577 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3578 nextNetworkRequestId()); 3579 if (DBG) log("pendingRequest for " + networkRequest + " to trigger " + operation); 3580 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3581 NetworkRequestInfo.REQUEST); 3582 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3583 nri)); 3584 return networkRequest; 3585 } 3586 3587 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3588 mHandler.sendMessageDelayed( 3589 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3590 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3591 } 3592 3593 @Override 3594 public void releasePendingNetworkRequest(PendingIntent operation) { 3595 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3596 getCallingUid(), 0, operation)); 3597 } 3598 3599 @Override 3600 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 3601 Messenger messenger, IBinder binder) { 3602 enforceAccessPermission(); 3603 3604 NetworkRequest networkRequest = new NetworkRequest(new NetworkCapabilities( 3605 networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3606 if (DBG) log("listenForNetwork for " + networkRequest); 3607 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3608 NetworkRequestInfo.LISTEN); 3609 3610 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3611 return networkRequest; 3612 } 3613 3614 @Override 3615 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 3616 PendingIntent operation) { 3617 } 3618 3619 @Override 3620 public void releaseNetworkRequest(NetworkRequest networkRequest) { 3621 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 3622 0, networkRequest)); 3623 } 3624 3625 @Override 3626 public void registerNetworkFactory(Messenger messenger, String name) { 3627 enforceConnectivityInternalPermission(); 3628 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 3629 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 3630 } 3631 3632 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 3633 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 3634 mNetworkFactoryInfos.put(nfi.messenger, nfi); 3635 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 3636 } 3637 3638 @Override 3639 public void unregisterNetworkFactory(Messenger messenger) { 3640 enforceConnectivityInternalPermission(); 3641 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 3642 } 3643 3644 private void handleUnregisterNetworkFactory(Messenger messenger) { 3645 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 3646 if (nfi == null) { 3647 loge("Failed to find Messenger in unregisterNetworkFactory"); 3648 return; 3649 } 3650 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 3651 } 3652 3653 /** 3654 * NetworkAgentInfo supporting a request by requestId. 3655 * These have already been vetted (their Capabilities satisfy the request) 3656 * and the are the highest scored network available. 3657 * the are keyed off the Requests requestId. 3658 */ 3659 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 3660 new SparseArray<NetworkAgentInfo>(); 3661 3662 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 3663 new SparseArray<NetworkAgentInfo>(); 3664 3665 // NetworkAgentInfo keyed off its connecting messenger 3666 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 3667 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 3668 new HashMap<Messenger, NetworkAgentInfo>(); 3669 3670 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 3671 private final NetworkRequest mDefaultRequest; 3672 3673 private NetworkAgentInfo getDefaultNetwork() { 3674 return mNetworkForRequestId.get(mDefaultRequest.requestId); 3675 } 3676 3677 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 3678 return nai == getDefaultNetwork(); 3679 } 3680 3681 public void registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 3682 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 3683 int currentScore, NetworkMisc networkMisc) { 3684 enforceConnectivityInternalPermission(); 3685 3686 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 3687 // satisfies mDefaultRequest. 3688 NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 3689 new NetworkInfo(networkInfo), new LinkProperties(linkProperties), 3690 new NetworkCapabilities(networkCapabilities), currentScore, mContext, mTrackerHandler, 3691 new NetworkMisc(networkMisc), mDefaultRequest); 3692 synchronized (this) { 3693 nai.networkMonitor.systemReady = mSystemReady; 3694 } 3695 if (DBG) log("registerNetworkAgent " + nai); 3696 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 3697 } 3698 3699 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 3700 if (VDBG) log("Got NetworkAgent Messenger"); 3701 mNetworkAgentInfos.put(na.messenger, na); 3702 assignNextNetId(na); 3703 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 3704 NetworkInfo networkInfo = na.networkInfo; 3705 na.networkInfo = null; 3706 updateNetworkInfo(na, networkInfo); 3707 } 3708 3709 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 3710 LinkProperties newLp = networkAgent.linkProperties; 3711 int netId = networkAgent.network.netId; 3712 3713 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 3714 // we do anything else, make sure its LinkProperties are accurate. 3715 if (networkAgent.clatd != null) { 3716 networkAgent.clatd.fixupLinkProperties(oldLp); 3717 } 3718 3719 updateInterfaces(newLp, oldLp, netId); 3720 updateMtu(newLp, oldLp); 3721 // TODO - figure out what to do for clat 3722// for (LinkProperties lp : newLp.getStackedLinks()) { 3723// updateMtu(lp, null); 3724// } 3725 updateTcpBufferSizes(networkAgent); 3726 3727 // TODO: deprecate and remove mDefaultDns when we can do so safely. 3728 // For now, use it only when the network has Internet access. http://b/18327075 3729 final boolean useDefaultDns = networkAgent.networkCapabilities.hasCapability( 3730 NetworkCapabilities.NET_CAPABILITY_INTERNET); 3731 final boolean flushDns = updateRoutes(newLp, oldLp, netId); 3732 updateDnses(newLp, oldLp, netId, flushDns, useDefaultDns); 3733 3734 updateClat(newLp, oldLp, networkAgent); 3735 if (isDefaultNetwork(networkAgent)) { 3736 handleApplyDefaultProxy(newLp.getHttpProxy()); 3737 } else { 3738 updateProxy(newLp, oldLp, networkAgent); 3739 } 3740 // TODO - move this check to cover the whole function 3741 if (!Objects.equals(newLp, oldLp)) { 3742 notifyIfacesChanged(); 3743 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 3744 } 3745 } 3746 3747 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3748 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 3749 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 3750 3751 if (!wasRunningClat && shouldRunClat) { 3752 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 3753 nai.clatd.start(); 3754 } else if (wasRunningClat && !shouldRunClat) { 3755 nai.clatd.stop(); 3756 } 3757 } 3758 3759 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 3760 CompareResult<String> interfaceDiff = new CompareResult<String>(); 3761 if (oldLp != null) { 3762 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 3763 } else if (newLp != null) { 3764 interfaceDiff.added = newLp.getAllInterfaceNames(); 3765 } 3766 for (String iface : interfaceDiff.added) { 3767 try { 3768 if (DBG) log("Adding iface " + iface + " to network " + netId); 3769 mNetd.addInterfaceToNetwork(iface, netId); 3770 } catch (Exception e) { 3771 loge("Exception adding interface: " + e); 3772 } 3773 } 3774 for (String iface : interfaceDiff.removed) { 3775 try { 3776 if (DBG) log("Removing iface " + iface + " from network " + netId); 3777 mNetd.removeInterfaceFromNetwork(iface, netId); 3778 } catch (Exception e) { 3779 loge("Exception removing interface: " + e); 3780 } 3781 } 3782 } 3783 3784 /** 3785 * Have netd update routes from oldLp to newLp. 3786 * @return true if routes changed between oldLp and newLp 3787 */ 3788 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 3789 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 3790 if (oldLp != null) { 3791 routeDiff = oldLp.compareAllRoutes(newLp); 3792 } else if (newLp != null) { 3793 routeDiff.added = newLp.getAllRoutes(); 3794 } 3795 3796 // add routes before removing old in case it helps with continuous connectivity 3797 3798 // do this twice, adding non-nexthop routes first, then routes they are dependent on 3799 for (RouteInfo route : routeDiff.added) { 3800 if (route.hasGateway()) continue; 3801 if (DBG) log("Adding Route [" + route + "] to network " + netId); 3802 try { 3803 mNetd.addRoute(netId, route); 3804 } catch (Exception e) { 3805 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 3806 loge("Exception in addRoute for non-gateway: " + e); 3807 } 3808 } 3809 } 3810 for (RouteInfo route : routeDiff.added) { 3811 if (route.hasGateway() == false) continue; 3812 if (DBG) log("Adding Route [" + route + "] to network " + netId); 3813 try { 3814 mNetd.addRoute(netId, route); 3815 } catch (Exception e) { 3816 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 3817 loge("Exception in addRoute for gateway: " + e); 3818 } 3819 } 3820 } 3821 3822 for (RouteInfo route : routeDiff.removed) { 3823 if (DBG) log("Removing Route [" + route + "] from network " + netId); 3824 try { 3825 mNetd.removeRoute(netId, route); 3826 } catch (Exception e) { 3827 loge("Exception in removeRoute: " + e); 3828 } 3829 } 3830 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 3831 } 3832 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId, 3833 boolean flush, boolean useDefaultDns) { 3834 if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) { 3835 Collection<InetAddress> dnses = newLp.getDnsServers(); 3836 if (dnses.size() == 0 && mDefaultDns != null && useDefaultDns) { 3837 dnses = new ArrayList(); 3838 dnses.add(mDefaultDns); 3839 if (DBG) { 3840 loge("no dns provided for netId " + netId + ", so using defaults"); 3841 } 3842 } 3843 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 3844 try { 3845 mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses), 3846 newLp.getDomains()); 3847 } catch (Exception e) { 3848 loge("Exception in setDnsServersForNetwork: " + e); 3849 } 3850 NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId); 3851 if (defaultNai != null && defaultNai.network.netId == netId) { 3852 setDefaultDnsSystemProperties(dnses); 3853 } 3854 flushVmDnsCache(); 3855 } else if (flush) { 3856 try { 3857 mNetd.flushNetworkDnsCache(netId); 3858 } catch (Exception e) { 3859 loge("Exception in flushNetworkDnsCache: " + e); 3860 } 3861 flushVmDnsCache(); 3862 } 3863 } 3864 3865 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 3866 int last = 0; 3867 for (InetAddress dns : dnses) { 3868 ++last; 3869 String key = "net.dns" + last; 3870 String value = dns.getHostAddress(); 3871 SystemProperties.set(key, value); 3872 } 3873 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 3874 String key = "net.dns" + i; 3875 SystemProperties.set(key, ""); 3876 } 3877 mNumDnsEntries = last; 3878 } 3879 3880 private void updateCapabilities(NetworkAgentInfo networkAgent, 3881 NetworkCapabilities networkCapabilities) { 3882 if (!Objects.equals(networkAgent.networkCapabilities, networkCapabilities)) { 3883 synchronized (networkAgent) { 3884 networkAgent.networkCapabilities = networkCapabilities; 3885 } 3886 rematchAllNetworksAndRequests(networkAgent, networkAgent.getCurrentScore()); 3887 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_CAP_CHANGED); 3888 } 3889 } 3890 3891 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 3892 for (int i = 0; i < nai.networkRequests.size(); i++) { 3893 NetworkRequest nr = nai.networkRequests.valueAt(i); 3894 // Don't send listening requests to factories. b/17393458 3895 if (!isRequest(nr)) continue; 3896 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 3897 } 3898 } 3899 3900 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 3901 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 3902 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 3903 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 3904 networkRequest); 3905 } 3906 } 3907 3908 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 3909 int notificationType) { 3910 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 3911 Intent intent = new Intent(); 3912 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 3913 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 3914 nri.mPendingIntentSent = true; 3915 sendIntent(nri.mPendingIntent, intent); 3916 } 3917 // else not handled 3918 } 3919 3920 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 3921 mPendingIntentWakeLock.acquire(); 3922 try { 3923 if (DBG) log("Sending " + pendingIntent); 3924 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 3925 } catch (PendingIntent.CanceledException e) { 3926 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 3927 mPendingIntentWakeLock.release(); 3928 releasePendingNetworkRequest(pendingIntent); 3929 } 3930 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 3931 } 3932 3933 @Override 3934 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 3935 String resultData, Bundle resultExtras) { 3936 if (DBG) log("Finished sending " + pendingIntent); 3937 mPendingIntentWakeLock.release(); 3938 // Release with a delay so the receiving client has an opportunity to put in its 3939 // own request. 3940 releasePendingNetworkRequestWithDelay(pendingIntent); 3941 } 3942 3943 private void callCallbackForRequest(NetworkRequestInfo nri, 3944 NetworkAgentInfo networkAgent, int notificationType) { 3945 if (nri.messenger == null) return; // Default request has no msgr 3946 Bundle bundle = new Bundle(); 3947 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 3948 new NetworkRequest(nri.request)); 3949 Message msg = Message.obtain(); 3950 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 3951 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 3952 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 3953 } 3954 switch (notificationType) { 3955 case ConnectivityManager.CALLBACK_LOSING: { 3956 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 3957 break; 3958 } 3959 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 3960 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 3961 new NetworkCapabilities(networkAgent.networkCapabilities)); 3962 break; 3963 } 3964 case ConnectivityManager.CALLBACK_IP_CHANGED: { 3965 bundle.putParcelable(LinkProperties.class.getSimpleName(), 3966 new LinkProperties(networkAgent.linkProperties)); 3967 break; 3968 } 3969 } 3970 msg.what = notificationType; 3971 msg.setData(bundle); 3972 try { 3973 if (VDBG) { 3974 log("sending notification " + notifyTypeToName(notificationType) + 3975 " for " + nri.request); 3976 } 3977 nri.messenger.send(msg); 3978 } catch (RemoteException e) { 3979 // may occur naturally in the race of binder death. 3980 loge("RemoteException caught trying to send a callback msg for " + nri.request); 3981 } 3982 } 3983 3984 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 3985 for (int i = 0; i < nai.networkRequests.size(); i++) { 3986 NetworkRequest nr = nai.networkRequests.valueAt(i); 3987 // Ignore listening requests. 3988 if (!isRequest(nr)) continue; 3989 loge("Dead network still had at least " + nr); 3990 break; 3991 } 3992 nai.asyncChannel.disconnect(); 3993 } 3994 3995 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 3996 if (oldNetwork == null) { 3997 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 3998 return; 3999 } 4000 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4001 teardownUnneededNetwork(oldNetwork); 4002 } 4003 4004 private void makeDefault(NetworkAgentInfo newNetwork) { 4005 if (DBG) log("Switching to new default network: " + newNetwork); 4006 setupDataActivityTracking(newNetwork); 4007 try { 4008 mNetd.setDefaultNetId(newNetwork.network.netId); 4009 } catch (Exception e) { 4010 loge("Exception setting default network :" + e); 4011 } 4012 notifyLockdownVpn(newNetwork); 4013 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4014 updateTcpBufferSizes(newNetwork); 4015 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4016 } 4017 4018 // Handles a network appearing or improving its score. 4019 // 4020 // - Evaluates all current NetworkRequests that can be 4021 // satisfied by newNetwork, and reassigns to newNetwork 4022 // any such requests for which newNetwork is the best. 4023 // 4024 // - Lingers any validated Networks that as a result are no longer 4025 // needed. A network is needed if it is the best network for 4026 // one or more NetworkRequests, or if it is a VPN. 4027 // 4028 // - Tears down newNetwork if it just became validated 4029 // (i.e. nascent==JUST_VALIDATED) but turns out to be unneeded. 4030 // 4031 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4032 // networks that have no chance (i.e. even if validated) 4033 // of becoming the highest scoring network. 4034 // 4035 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4036 // it does not remove NetworkRequests that other Networks could better satisfy. 4037 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4038 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4039 // as it performs better by a factor of the number of Networks. 4040 // 4041 // @param newNetwork is the network to be matched against NetworkRequests. 4042 // @param nascent indicates if newNetwork just became validated, in which case it should be 4043 // torn down if unneeded. 4044 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4045 // performed to tear down unvalidated networks that have no chance (i.e. even if 4046 // validated) of becoming the highest scoring network. 4047 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, NascentState nascent, 4048 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4049 if (!newNetwork.created) return; 4050 if (nascent == NascentState.JUST_VALIDATED && !newNetwork.everValidated) { 4051 loge("ERROR: nascent network not validated."); 4052 } 4053 boolean keep = newNetwork.isVPN(); 4054 boolean isNewDefault = false; 4055 NetworkAgentInfo oldDefaultNetwork = null; 4056 if (DBG) log("rematching " + newNetwork.name()); 4057 // Find and migrate to this Network any NetworkRequests for 4058 // which this network is now the best. 4059 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4060 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4061 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4062 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4063 if (newNetwork == currentNetwork) { 4064 if (DBG) { 4065 log("Network " + newNetwork.name() + " was already satisfying" + 4066 " request " + nri.request.requestId + ". No change."); 4067 } 4068 keep = true; 4069 continue; 4070 } 4071 4072 // check if it satisfies the NetworkCapabilities 4073 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4074 if (newNetwork.satisfies(nri.request)) { 4075 if (!nri.isRequest) { 4076 // This is not a request, it's a callback listener. 4077 // Add it to newNetwork regardless of score. 4078 newNetwork.addRequest(nri.request); 4079 continue; 4080 } 4081 4082 // next check if it's better than any current network we're using for 4083 // this request 4084 if (VDBG) { 4085 log("currentScore = " + 4086 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4087 ", newScore = " + newNetwork.getCurrentScore()); 4088 } 4089 if (currentNetwork == null || 4090 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4091 if (currentNetwork != null) { 4092 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4093 currentNetwork.networkRequests.remove(nri.request.requestId); 4094 currentNetwork.networkLingered.add(nri.request); 4095 affectedNetworks.add(currentNetwork); 4096 } else { 4097 if (DBG) log(" accepting network in place of null"); 4098 } 4099 unlinger(newNetwork); 4100 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4101 newNetwork.addRequest(nri.request); 4102 keep = true; 4103 // Tell NetworkFactories about the new score, so they can stop 4104 // trying to connect if they know they cannot match it. 4105 // TODO - this could get expensive if we have alot of requests for this 4106 // network. Think about if there is a way to reduce this. Push 4107 // netid->request mapping to each factory? 4108 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4109 if (mDefaultRequest.requestId == nri.request.requestId) { 4110 isNewDefault = true; 4111 oldDefaultNetwork = currentNetwork; 4112 } 4113 } 4114 } 4115 } 4116 // Linger any networks that are no longer needed. 4117 for (NetworkAgentInfo nai : affectedNetworks) { 4118 if (nai.everValidated && unneeded(nai)) { 4119 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 4120 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 4121 } else { 4122 unlinger(nai); 4123 } 4124 } 4125 if (keep) { 4126 if (isNewDefault) { 4127 // Notify system services that this network is up. 4128 makeDefault(newNetwork); 4129 synchronized (ConnectivityService.this) { 4130 // have a new default network, release the transition wakelock in 4131 // a second if it's held. The second pause is to allow apps 4132 // to reconnect over the new network 4133 if (mNetTransitionWakeLock.isHeld()) { 4134 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4135 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4136 mNetTransitionWakeLockSerialNumber, 0), 4137 1000); 4138 } 4139 } 4140 } 4141 4142 // do this after the default net is switched, but 4143 // before LegacyTypeTracker sends legacy broadcasts 4144 notifyNetworkCallbacks(newNetwork, ConnectivityManager.CALLBACK_AVAILABLE); 4145 4146 if (isNewDefault) { 4147 // Maintain the illusion: since the legacy API only 4148 // understands one network at a time, we must pretend 4149 // that the current default network disconnected before 4150 // the new one connected. 4151 if (oldDefaultNetwork != null) { 4152 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4153 oldDefaultNetwork); 4154 } 4155 mDefaultInetConditionPublished = newNetwork.everValidated ? 100 : 0; 4156 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4157 notifyLockdownVpn(newNetwork); 4158 } 4159 4160 // Notify battery stats service about this network, both the normal 4161 // interface and any stacked links. 4162 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4163 try { 4164 final IBatteryStats bs = BatteryStatsService.getService(); 4165 final int type = newNetwork.networkInfo.getType(); 4166 4167 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4168 bs.noteNetworkInterfaceType(baseIface, type); 4169 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4170 final String stackedIface = stacked.getInterfaceName(); 4171 bs.noteNetworkInterfaceType(stackedIface, type); 4172 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4173 } 4174 } catch (RemoteException ignored) { 4175 } 4176 4177 // This has to happen after the notifyNetworkCallbacks as that tickles each 4178 // ConnectivityManager instance so that legacy requests correctly bind dns 4179 // requests to this network. The legacy users are listening for this bcast 4180 // and will generally do a dns request so they can ensureRouteToHost and if 4181 // they do that before the callbacks happen they'll use the default network. 4182 // 4183 // TODO: Is there still a race here? We send the broadcast 4184 // after sending the callback, but if the app can receive the 4185 // broadcast before the callback, it might still break. 4186 // 4187 // This *does* introduce a race where if the user uses the new api 4188 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4189 // they may get old info. Reverse this after the old startUsing api is removed. 4190 // This is on top of the multiple intent sequencing referenced in the todo above. 4191 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4192 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4193 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4194 // legacy type tracker filters out repeat adds 4195 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4196 } 4197 } 4198 4199 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4200 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4201 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4202 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4203 if (newNetwork.isVPN()) { 4204 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4205 } 4206 } else if (nascent == NascentState.JUST_VALIDATED) { 4207 // Only tear down newly validated networks here. Leave unvalidated to either become 4208 // validated (and get evaluated against peers, one losing here), or get reaped (see 4209 // reapUnvalidatedNetworks) if they have no chance of becoming the highest scoring 4210 // network. Networks that have been up for a while and are validated should be torn 4211 // down via the lingering process so communication on that network is given time to 4212 // wrap up. 4213 if (DBG) log("Validated network turns out to be unwanted. Tear it down."); 4214 teardownUnneededNetwork(newNetwork); 4215 } 4216 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4217 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4218 if (!nai.everValidated && unneeded(nai)) { 4219 if (DBG) log("Reaping " + nai.name()); 4220 teardownUnneededNetwork(nai); 4221 } 4222 } 4223 } 4224 } 4225 4226 // Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4227 // being disconnected. 4228 // If only one Network's score or capabilities have been modified since the last time 4229 // this function was called, pass this Network in via the "changed" arugment, otherwise 4230 // pass null. 4231 // If only one Network has been changed but its NetworkCapabilities have not changed, 4232 // pass in the Network's score (from getCurrentScore()) prior to the change via 4233 // "oldScore", otherwise pass changed.getCurrentScore() or 0 if "changed" is null. 4234 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4235 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4236 // to avoid the slowness. It is not simply enough to process just "changed", for 4237 // example in the case where "changed"'s score decreases and another network should begin 4238 // satifying a NetworkRequest that "changed" currently satisfies. 4239 4240 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4241 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4242 // rematchNetworkAndRequests() handles. 4243 if (changed != null && oldScore < changed.getCurrentScore()) { 4244 rematchNetworkAndRequests(changed, NascentState.NOT_JUST_VALIDATED, 4245 ReapUnvalidatedNetworks.REAP); 4246 } else { 4247 for (Iterator i = mNetworkAgentInfos.values().iterator(); i.hasNext(); ) { 4248 rematchNetworkAndRequests((NetworkAgentInfo)i.next(), 4249 NascentState.NOT_JUST_VALIDATED, 4250 // Only reap the last time through the loop. Reaping before all rematching 4251 // is complete could incorrectly teardown a network that hasn't yet been 4252 // rematched. 4253 i.hasNext() ? ReapUnvalidatedNetworks.DONT_REAP 4254 : ReapUnvalidatedNetworks.REAP); 4255 } 4256 } 4257 } 4258 4259 private void updateInetCondition(NetworkAgentInfo nai) { 4260 // Don't bother updating until we've graduated to validated at least once. 4261 if (!nai.everValidated) return; 4262 // For now only update icons for default connection. 4263 // TODO: Update WiFi and cellular icons separately. b/17237507 4264 if (!isDefaultNetwork(nai)) return; 4265 4266 int newInetCondition = nai.lastValidated ? 100 : 0; 4267 // Don't repeat publish. 4268 if (newInetCondition == mDefaultInetConditionPublished) return; 4269 4270 mDefaultInetConditionPublished = newInetCondition; 4271 sendInetConditionBroadcast(nai.networkInfo); 4272 } 4273 4274 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4275 if (mLockdownTracker != null) { 4276 if (nai != null && nai.isVPN()) { 4277 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4278 } else { 4279 mLockdownTracker.onNetworkInfoChanged(); 4280 } 4281 } 4282 } 4283 4284 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4285 NetworkInfo.State state = newInfo.getState(); 4286 NetworkInfo oldInfo = null; 4287 synchronized (networkAgent) { 4288 oldInfo = networkAgent.networkInfo; 4289 networkAgent.networkInfo = newInfo; 4290 } 4291 notifyLockdownVpn(networkAgent); 4292 4293 if (oldInfo != null && oldInfo.getState() == state) { 4294 if (VDBG) log("ignoring duplicate network state non-change"); 4295 return; 4296 } 4297 if (DBG) { 4298 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4299 (oldInfo == null ? "null" : oldInfo.getState()) + 4300 " to " + state); 4301 } 4302 4303 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4304 try { 4305 // This should never fail. Specifying an already in use NetID will cause failure. 4306 if (networkAgent.isVPN()) { 4307 mNetd.createVirtualNetwork(networkAgent.network.netId, 4308 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4309 (networkAgent.networkMisc == null || 4310 !networkAgent.networkMisc.allowBypass)); 4311 } else { 4312 mNetd.createPhysicalNetwork(networkAgent.network.netId); 4313 } 4314 } catch (Exception e) { 4315 loge("Error creating network " + networkAgent.network.netId + ": " 4316 + e.getMessage()); 4317 return; 4318 } 4319 networkAgent.created = true; 4320 updateLinkProperties(networkAgent, null); 4321 notifyIfacesChanged(); 4322 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4323 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4324 if (networkAgent.isVPN()) { 4325 // Temporarily disable the default proxy (not global). 4326 synchronized (mProxyLock) { 4327 if (!mDefaultProxyDisabled) { 4328 mDefaultProxyDisabled = true; 4329 if (mGlobalProxy == null && mDefaultProxy != null) { 4330 sendProxyBroadcast(null); 4331 } 4332 } 4333 } 4334 // TODO: support proxy per network. 4335 } 4336 // Consider network even though it is not yet validated. 4337 rematchNetworkAndRequests(networkAgent, NascentState.NOT_JUST_VALIDATED, 4338 ReapUnvalidatedNetworks.REAP); 4339 } else if (state == NetworkInfo.State.DISCONNECTED || 4340 state == NetworkInfo.State.SUSPENDED) { 4341 networkAgent.asyncChannel.disconnect(); 4342 if (networkAgent.isVPN()) { 4343 synchronized (mProxyLock) { 4344 if (mDefaultProxyDisabled) { 4345 mDefaultProxyDisabled = false; 4346 if (mGlobalProxy == null && mDefaultProxy != null) { 4347 sendProxyBroadcast(mDefaultProxy); 4348 } 4349 } 4350 } 4351 } 4352 } 4353 } 4354 4355 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4356 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4357 if (score < 0) { 4358 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4359 "). Bumping score to min of 0"); 4360 score = 0; 4361 } 4362 4363 final int oldScore = nai.getCurrentScore(); 4364 nai.setCurrentScore(score); 4365 4366 rematchAllNetworksAndRequests(nai, oldScore); 4367 4368 sendUpdatedScoreToFactories(nai); 4369 } 4370 4371 // notify only this one new request of the current state 4372 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4373 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4374 // TODO - read state from monitor to decide what to send. 4375// if (nai.networkMonitor.isLingering()) { 4376// notifyType = NetworkCallbacks.LOSING; 4377// } else if (nai.networkMonitor.isEvaluating()) { 4378// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4379// } 4380 if (nri.mPendingIntent == null) { 4381 callCallbackForRequest(nri, nai, notifyType); 4382 } else { 4383 sendPendingIntentForRequest(nri, nai, notifyType); 4384 } 4385 } 4386 4387 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, boolean connected, int type) { 4388 // The NetworkInfo we actually send out has no bearing on the real 4389 // state of affairs. For example, if the default connection is mobile, 4390 // and a request for HIPRI has just gone away, we need to pretend that 4391 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4392 // the state to DISCONNECTED, even though the network is of type MOBILE 4393 // and is still connected. 4394 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4395 info.setType(type); 4396 if (connected) { 4397 info.setDetailedState(DetailedState.CONNECTED, null, info.getExtraInfo()); 4398 sendConnectedBroadcast(info); 4399 } else { 4400 info.setDetailedState(DetailedState.DISCONNECTED, null, info.getExtraInfo()); 4401 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4402 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4403 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4404 if (info.isFailover()) { 4405 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4406 nai.networkInfo.setFailover(false); 4407 } 4408 if (info.getReason() != null) { 4409 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4410 } 4411 if (info.getExtraInfo() != null) { 4412 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4413 } 4414 NetworkAgentInfo newDefaultAgent = null; 4415 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4416 newDefaultAgent = mNetworkForRequestId.get(mDefaultRequest.requestId); 4417 if (newDefaultAgent != null) { 4418 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4419 newDefaultAgent.networkInfo); 4420 } else { 4421 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4422 } 4423 } 4424 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4425 mDefaultInetConditionPublished); 4426 final Intent immediateIntent = new Intent(intent); 4427 immediateIntent.setAction(CONNECTIVITY_ACTION_IMMEDIATE); 4428 sendStickyBroadcast(immediateIntent); 4429 sendStickyBroadcast(intent); 4430 if (newDefaultAgent != null) { 4431 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4432 } 4433 } 4434 } 4435 4436 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4437 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4438 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4439 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4440 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4441 if (VDBG) log(" sending notification for " + nr); 4442 if (nri.mPendingIntent == null) { 4443 callCallbackForRequest(nri, networkAgent, notifyType); 4444 } else { 4445 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4446 } 4447 } 4448 } 4449 4450 private String notifyTypeToName(int notifyType) { 4451 switch (notifyType) { 4452 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4453 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4454 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4455 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4456 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4457 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4458 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4459 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4460 } 4461 return "UNKNOWN"; 4462 } 4463 4464 /** 4465 * Notify other system services that set of active ifaces has changed. 4466 */ 4467 private void notifyIfacesChanged() { 4468 try { 4469 mStatsService.forceUpdateIfaces(); 4470 } catch (Exception ignored) { 4471 } 4472 } 4473 4474 @Override 4475 public boolean addVpnAddress(String address, int prefixLength) { 4476 throwIfLockdownEnabled(); 4477 int user = UserHandle.getUserId(Binder.getCallingUid()); 4478 synchronized (mVpns) { 4479 return mVpns.get(user).addAddress(address, prefixLength); 4480 } 4481 } 4482 4483 @Override 4484 public boolean removeVpnAddress(String address, int prefixLength) { 4485 throwIfLockdownEnabled(); 4486 int user = UserHandle.getUserId(Binder.getCallingUid()); 4487 synchronized (mVpns) { 4488 return mVpns.get(user).removeAddress(address, prefixLength); 4489 } 4490 } 4491 4492 @Override 4493 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 4494 throwIfLockdownEnabled(); 4495 int user = UserHandle.getUserId(Binder.getCallingUid()); 4496 synchronized (mVpns) { 4497 return mVpns.get(user).setUnderlyingNetworks(networks); 4498 } 4499 } 4500} 4501