ConnectivityService.java revision d6a7980dd9a52f082091cf000095b77a9d44565d
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 Network[] getVpnUnderlyingNetworks(int uid) { 836 if (!mLockdownEnabled) { 837 int user = UserHandle.getUserId(uid); 838 synchronized (mVpns) { 839 Vpn vpn = mVpns.get(user); 840 if (vpn != null && vpn.appliesToUid(uid)) { 841 return vpn.getUnderlyingNetworks(); 842 } 843 } 844 } 845 return null; 846 } 847 848 private NetworkState getUnfilteredActiveNetworkState(int uid) { 849 NetworkInfo info = null; 850 LinkProperties lp = null; 851 NetworkCapabilities nc = null; 852 Network network = null; 853 String subscriberId = null; 854 855 NetworkAgentInfo nai = mNetworkForRequestId.get(mDefaultRequest.requestId); 856 857 final Network[] networks = getVpnUnderlyingNetworks(uid); 858 if (networks != null) { 859 // getUnderlyingNetworks() returns: 860 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 861 // empty array => the VPN explicitly said "no default network". 862 // non-empty array => the VPN specified one or more default networks; we use the 863 // first one. 864 if (networks.length > 0) { 865 nai = getNetworkAgentInfoForNetwork(networks[0]); 866 } else { 867 nai = null; 868 } 869 } 870 871 if (nai != null) { 872 synchronized (nai) { 873 info = new NetworkInfo(nai.networkInfo); 874 lp = new LinkProperties(nai.linkProperties); 875 nc = new NetworkCapabilities(nai.networkCapabilities); 876 network = new Network(nai.network); 877 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 878 } 879 } 880 881 return new NetworkState(info, lp, nc, network, subscriberId, null); 882 } 883 884 /** 885 * Check if UID should be blocked from using the network with the given LinkProperties. 886 */ 887 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 888 final boolean networkCostly; 889 final int uidRules; 890 891 final String iface = (lp == null ? "" : lp.getInterfaceName()); 892 synchronized (mRulesLock) { 893 networkCostly = mMeteredIfaces.contains(iface); 894 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 895 } 896 897 if (networkCostly && (uidRules & RULE_REJECT_METERED) != 0) { 898 return true; 899 } 900 901 // no restrictive rules; network is visible 902 return false; 903 } 904 905 /** 906 * Return a filtered {@link NetworkInfo}, potentially marked 907 * {@link DetailedState#BLOCKED} based on 908 * {@link #isNetworkWithLinkPropertiesBlocked}. 909 */ 910 private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, LinkProperties lp, int uid) { 911 if (info != null && isNetworkWithLinkPropertiesBlocked(lp, uid)) { 912 // network is blocked; clone and override state 913 info = new NetworkInfo(info); 914 info.setDetailedState(DetailedState.BLOCKED, null, null); 915 if (DBG) { 916 log("returning Blocked NetworkInfo for ifname=" + 917 lp.getInterfaceName() + ", uid=" + uid); 918 } 919 } 920 if (info != null && mLockdownTracker != null) { 921 info = mLockdownTracker.augmentNetworkInfo(info); 922 if (DBG) log("returning Locked NetworkInfo"); 923 } 924 return info; 925 } 926 927 /** 928 * Return NetworkInfo for the active (i.e., connected) network interface. 929 * It is assumed that at most one network is active at a time. If more 930 * than one is active, it is indeterminate which will be returned. 931 * @return the info for the active network, or {@code null} if none is 932 * active 933 */ 934 @Override 935 public NetworkInfo getActiveNetworkInfo() { 936 enforceAccessPermission(); 937 final int uid = Binder.getCallingUid(); 938 NetworkState state = getUnfilteredActiveNetworkState(uid); 939 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 940 } 941 942 /** 943 * Find the first Provisioning network. 944 * 945 * @return NetworkInfo or null if none. 946 */ 947 private NetworkInfo getProvisioningNetworkInfo() { 948 enforceAccessPermission(); 949 950 // Find the first Provisioning Network 951 NetworkInfo provNi = null; 952 for (NetworkInfo ni : getAllNetworkInfo()) { 953 if (ni.isConnectedToProvisioningNetwork()) { 954 provNi = ni; 955 break; 956 } 957 } 958 if (DBG) log("getProvisioningNetworkInfo: X provNi=" + provNi); 959 return provNi; 960 } 961 962 /** 963 * Find the first Provisioning network or the ActiveDefaultNetwork 964 * if there is no Provisioning network 965 * 966 * @return NetworkInfo or null if none. 967 */ 968 @Override 969 public NetworkInfo getProvisioningOrActiveNetworkInfo() { 970 enforceAccessPermission(); 971 972 NetworkInfo provNi = getProvisioningNetworkInfo(); 973 if (provNi == null) { 974 provNi = getActiveNetworkInfo(); 975 } 976 if (DBG) log("getProvisioningOrActiveNetworkInfo: X provNi=" + provNi); 977 return provNi; 978 } 979 980 public NetworkInfo getActiveNetworkInfoUnfiltered() { 981 enforceAccessPermission(); 982 final int uid = Binder.getCallingUid(); 983 NetworkState state = getUnfilteredActiveNetworkState(uid); 984 return state.networkInfo; 985 } 986 987 @Override 988 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 989 enforceConnectivityInternalPermission(); 990 NetworkState state = getUnfilteredActiveNetworkState(uid); 991 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 992 } 993 994 @Override 995 public NetworkInfo getNetworkInfo(int networkType) { 996 enforceAccessPermission(); 997 final int uid = Binder.getCallingUid(); 998 if (getVpnUnderlyingNetworks(uid) != null) { 999 // A VPN is active, so we may need to return one of its underlying networks. This 1000 // information is not available in LegacyTypeTracker, so we have to get it from 1001 // getUnfilteredActiveNetworkState. 1002 NetworkState state = getUnfilteredActiveNetworkState(uid); 1003 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1004 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1005 } 1006 } 1007 NetworkState state = getFilteredNetworkState(networkType, uid); 1008 return state.networkInfo; 1009 } 1010 1011 @Override 1012 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1013 enforceAccessPermission(); 1014 final int uid = Binder.getCallingUid(); 1015 NetworkInfo info = null; 1016 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1017 if (nai != null) { 1018 synchronized (nai) { 1019 info = new NetworkInfo(nai.networkInfo); 1020 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1021 } 1022 } 1023 return info; 1024 } 1025 1026 @Override 1027 public NetworkInfo[] getAllNetworkInfo() { 1028 enforceAccessPermission(); 1029 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1030 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1031 networkType++) { 1032 NetworkInfo info = getNetworkInfo(networkType); 1033 if (info != null) { 1034 result.add(info); 1035 } 1036 } 1037 return result.toArray(new NetworkInfo[result.size()]); 1038 } 1039 1040 @Override 1041 public Network getNetworkForType(int networkType) { 1042 enforceAccessPermission(); 1043 final int uid = Binder.getCallingUid(); 1044 NetworkState state = getFilteredNetworkState(networkType, uid); 1045 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1046 return state.network; 1047 } 1048 return null; 1049 } 1050 1051 @Override 1052 public Network[] getAllNetworks() { 1053 enforceAccessPermission(); 1054 final ArrayList<Network> result = new ArrayList(); 1055 synchronized (mNetworkForNetId) { 1056 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1057 result.add(new Network(mNetworkForNetId.valueAt(i).network)); 1058 } 1059 } 1060 return result.toArray(new Network[result.size()]); 1061 } 1062 1063 private NetworkCapabilities getNetworkCapabilitiesAndValidation(NetworkAgentInfo nai) { 1064 if (nai != null) { 1065 synchronized (nai) { 1066 if (nai.created) { 1067 NetworkCapabilities nc = new NetworkCapabilities(nai.networkCapabilities); 1068 if (nai.lastValidated) { 1069 nc.addCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED); 1070 } else { 1071 nc.removeCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED); 1072 } 1073 return nc; 1074 } 1075 } 1076 } 1077 return null; 1078 } 1079 1080 @Override 1081 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1082 // The basic principle is: if an app's traffic could possibly go over a 1083 // network, without the app doing anything multinetwork-specific, 1084 // (hence, by "default"), then include that network's capabilities in 1085 // the array. 1086 // 1087 // In the normal case, app traffic only goes over the system's default 1088 // network connection, so that's the only network returned. 1089 // 1090 // With a VPN in force, some app traffic may go into the VPN, and thus 1091 // over whatever underlying networks the VPN specifies, while other app 1092 // traffic may go over the system default network (e.g.: a split-tunnel 1093 // VPN, or an app disallowed by the VPN), so the set of networks 1094 // returned includes the VPN's underlying networks and the system 1095 // default. 1096 enforceAccessPermission(); 1097 1098 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1099 1100 NetworkAgentInfo nai = getDefaultNetwork(); 1101 NetworkCapabilities nc = getNetworkCapabilitiesAndValidation(getDefaultNetwork()); 1102 if (nc != null) { 1103 result.put(nai.network, nc); 1104 } 1105 1106 if (!mLockdownEnabled) { 1107 synchronized (mVpns) { 1108 Vpn vpn = mVpns.get(userId); 1109 if (vpn != null) { 1110 Network[] networks = vpn.getUnderlyingNetworks(); 1111 if (networks != null) { 1112 for (Network network : networks) { 1113 nai = getNetworkAgentInfoForNetwork(network); 1114 nc = getNetworkCapabilitiesAndValidation(nai); 1115 if (nc != null) { 1116 result.put(nai.network, nc); 1117 } 1118 } 1119 } 1120 } 1121 } 1122 } 1123 1124 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1125 out = result.values().toArray(out); 1126 return out; 1127 } 1128 1129 @Override 1130 public boolean isNetworkSupported(int networkType) { 1131 enforceAccessPermission(); 1132 return mLegacyTypeTracker.isTypeSupported(networkType); 1133 } 1134 1135 /** 1136 * Return LinkProperties for the active (i.e., connected) default 1137 * network interface. It is assumed that at most one default network 1138 * is active at a time. If more than one is active, it is indeterminate 1139 * which will be returned. 1140 * @return the ip properties for the active network, or {@code null} if 1141 * none is active 1142 */ 1143 @Override 1144 public LinkProperties getActiveLinkProperties() { 1145 enforceAccessPermission(); 1146 final int uid = Binder.getCallingUid(); 1147 NetworkState state = getUnfilteredActiveNetworkState(uid); 1148 return state.linkProperties; 1149 } 1150 1151 @Override 1152 public LinkProperties getLinkPropertiesForType(int networkType) { 1153 enforceAccessPermission(); 1154 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1155 if (nai != null) { 1156 synchronized (nai) { 1157 return new LinkProperties(nai.linkProperties); 1158 } 1159 } 1160 return null; 1161 } 1162 1163 // TODO - this should be ALL networks 1164 @Override 1165 public LinkProperties getLinkProperties(Network network) { 1166 enforceAccessPermission(); 1167 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1168 if (nai != null) { 1169 synchronized (nai) { 1170 return new LinkProperties(nai.linkProperties); 1171 } 1172 } 1173 return null; 1174 } 1175 1176 @Override 1177 public NetworkCapabilities getNetworkCapabilities(Network network) { 1178 enforceAccessPermission(); 1179 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1180 if (nai != null) { 1181 synchronized (nai) { 1182 return new NetworkCapabilities(nai.networkCapabilities); 1183 } 1184 } 1185 return null; 1186 } 1187 1188 @Override 1189 public NetworkState[] getAllNetworkState() { 1190 // Require internal since we're handing out IMSI details 1191 enforceConnectivityInternalPermission(); 1192 1193 final ArrayList<NetworkState> result = Lists.newArrayList(); 1194 for (Network network : getAllNetworks()) { 1195 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1196 if (nai != null) { 1197 synchronized (nai) { 1198 final String subscriberId = (nai.networkMisc != null) 1199 ? nai.networkMisc.subscriberId : null; 1200 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1201 nai.networkCapabilities, network, subscriberId, null)); 1202 } 1203 } 1204 } 1205 return result.toArray(new NetworkState[result.size()]); 1206 } 1207 1208 @Override 1209 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1210 enforceAccessPermission(); 1211 final int uid = Binder.getCallingUid(); 1212 final long token = Binder.clearCallingIdentity(); 1213 try { 1214 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1215 if (state.networkInfo != null) { 1216 try { 1217 return mPolicyManager.getNetworkQuotaInfo(state); 1218 } catch (RemoteException e) { 1219 } 1220 } 1221 return null; 1222 } finally { 1223 Binder.restoreCallingIdentity(token); 1224 } 1225 } 1226 1227 @Override 1228 public boolean isActiveNetworkMetered() { 1229 enforceAccessPermission(); 1230 final int uid = Binder.getCallingUid(); 1231 final long token = Binder.clearCallingIdentity(); 1232 try { 1233 return isActiveNetworkMeteredUnchecked(uid); 1234 } finally { 1235 Binder.restoreCallingIdentity(token); 1236 } 1237 } 1238 1239 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1240 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1241 if (state.networkInfo != null) { 1242 try { 1243 return mPolicyManager.isNetworkMetered(state); 1244 } catch (RemoteException e) { 1245 } 1246 } 1247 return false; 1248 } 1249 1250 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1251 @Override 1252 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1253 int deviceType = Integer.parseInt(label); 1254 sendDataActivityBroadcast(deviceType, active, tsNanos); 1255 } 1256 }; 1257 1258 /** 1259 * Ensure that a network route exists to deliver traffic to the specified 1260 * host via the specified network interface. 1261 * @param networkType the type of the network over which traffic to the 1262 * specified host is to be routed 1263 * @param hostAddress the IP address of the host to which the route is 1264 * desired 1265 * @return {@code true} on success, {@code false} on failure 1266 */ 1267 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1268 enforceChangePermission(); 1269 if (mProtectedNetworks.contains(networkType)) { 1270 enforceConnectivityInternalPermission(); 1271 } 1272 1273 InetAddress addr; 1274 try { 1275 addr = InetAddress.getByAddress(hostAddress); 1276 } catch (UnknownHostException e) { 1277 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1278 return false; 1279 } 1280 1281 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1282 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1283 return false; 1284 } 1285 1286 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1287 if (nai == null) { 1288 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1289 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1290 } else { 1291 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1292 } 1293 return false; 1294 } 1295 1296 DetailedState netState; 1297 synchronized (nai) { 1298 netState = nai.networkInfo.getDetailedState(); 1299 } 1300 1301 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1302 if (VDBG) { 1303 log("requestRouteToHostAddress on down network " 1304 + "(" + networkType + ") - dropped" 1305 + " netState=" + netState); 1306 } 1307 return false; 1308 } 1309 1310 final int uid = Binder.getCallingUid(); 1311 final long token = Binder.clearCallingIdentity(); 1312 try { 1313 LinkProperties lp; 1314 int netId; 1315 synchronized (nai) { 1316 lp = nai.linkProperties; 1317 netId = nai.network.netId; 1318 } 1319 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1320 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1321 return ok; 1322 } finally { 1323 Binder.restoreCallingIdentity(token); 1324 } 1325 } 1326 1327 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1328 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1329 if (bestRoute == null) { 1330 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1331 } else { 1332 String iface = bestRoute.getInterface(); 1333 if (bestRoute.getGateway().equals(addr)) { 1334 // if there is no better route, add the implied hostroute for our gateway 1335 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1336 } else { 1337 // if we will connect to this through another route, add a direct route 1338 // to it's gateway 1339 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1340 } 1341 } 1342 if (DBG) log("Adding " + bestRoute + " for interface " + bestRoute.getInterface()); 1343 try { 1344 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1345 } catch (Exception e) { 1346 // never crash - catch them all 1347 if (DBG) loge("Exception trying to add a route: " + e); 1348 return false; 1349 } 1350 return true; 1351 } 1352 1353 public void setDataDependency(int networkType, boolean met) { 1354 enforceConnectivityInternalPermission(); 1355 1356 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_DEPENDENCY_MET, 1357 (met ? ENABLED : DISABLED), networkType)); 1358 } 1359 1360 private void handleSetDependencyMet(int networkType, boolean met) { 1361 if (mNetTrackers[networkType] != null) { 1362 if (DBG) { 1363 log("handleSetDependencyMet(" + networkType + ", " + met + ")"); 1364 } 1365 mNetTrackers[networkType].setDependencyMet(met); 1366 } 1367 } 1368 1369 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1370 @Override 1371 public void onUidRulesChanged(int uid, int uidRules) { 1372 // caller is NPMS, since we only register with them 1373 if (LOGD_RULES) { 1374 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1375 } 1376 1377 synchronized (mRulesLock) { 1378 // skip update when we've already applied rules 1379 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1380 if (oldRules == uidRules) return; 1381 1382 mUidRules.put(uid, uidRules); 1383 } 1384 1385 // TODO: notify UID when it has requested targeted updates 1386 } 1387 1388 @Override 1389 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1390 // caller is NPMS, since we only register with them 1391 if (LOGD_RULES) { 1392 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1393 } 1394 1395 synchronized (mRulesLock) { 1396 mMeteredIfaces.clear(); 1397 for (String iface : meteredIfaces) { 1398 mMeteredIfaces.add(iface); 1399 } 1400 } 1401 } 1402 1403 @Override 1404 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1405 // caller is NPMS, since we only register with them 1406 if (LOGD_RULES) { 1407 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1408 } 1409 1410 // kick off connectivity change broadcast for active network, since 1411 // global background policy change is radical. 1412 // TODO: Dead code; remove. 1413 // 1414 // final int networkType = mActiveDefaultNetwork; 1415 // if (isNetworkTypeValid(networkType)) { 1416 // final NetworkStateTracker tracker = mNetTrackers[networkType]; 1417 // if (tracker != null) { 1418 // final NetworkInfo info = tracker.getNetworkInfo(); 1419 // if (info != null && info.isConnected()) { 1420 // sendConnectedBroadcast(info); 1421 // } 1422 // } 1423 // } 1424 } 1425 }; 1426 1427 private void enforceInternetPermission() { 1428 mContext.enforceCallingOrSelfPermission( 1429 android.Manifest.permission.INTERNET, 1430 "ConnectivityService"); 1431 } 1432 1433 private void enforceAccessPermission() { 1434 mContext.enforceCallingOrSelfPermission( 1435 android.Manifest.permission.ACCESS_NETWORK_STATE, 1436 "ConnectivityService"); 1437 } 1438 1439 private void enforceChangePermission() { 1440 mContext.enforceCallingOrSelfPermission( 1441 android.Manifest.permission.CHANGE_NETWORK_STATE, 1442 "ConnectivityService"); 1443 } 1444 1445 private void enforceTetherAccessPermission() { 1446 mContext.enforceCallingOrSelfPermission( 1447 android.Manifest.permission.ACCESS_NETWORK_STATE, 1448 "ConnectivityService"); 1449 } 1450 1451 private void enforceConnectivityInternalPermission() { 1452 mContext.enforceCallingOrSelfPermission( 1453 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1454 "ConnectivityService"); 1455 } 1456 1457 public void sendConnectedBroadcast(NetworkInfo info) { 1458 enforceConnectivityInternalPermission(); 1459 sendGeneralBroadcast(info, CONNECTIVITY_ACTION_IMMEDIATE); 1460 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1461 } 1462 1463 private void sendInetConditionBroadcast(NetworkInfo info) { 1464 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1465 } 1466 1467 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1468 if (mLockdownTracker != null) { 1469 info = mLockdownTracker.augmentNetworkInfo(info); 1470 } 1471 1472 Intent intent = new Intent(bcastType); 1473 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1474 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1475 if (info.isFailover()) { 1476 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1477 info.setFailover(false); 1478 } 1479 if (info.getReason() != null) { 1480 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1481 } 1482 if (info.getExtraInfo() != null) { 1483 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1484 info.getExtraInfo()); 1485 } 1486 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1487 return intent; 1488 } 1489 1490 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1491 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1492 } 1493 1494 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1495 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1496 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1497 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1498 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1499 final long ident = Binder.clearCallingIdentity(); 1500 try { 1501 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1502 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1503 } finally { 1504 Binder.restoreCallingIdentity(ident); 1505 } 1506 } 1507 1508 private void sendStickyBroadcast(Intent intent) { 1509 synchronized(this) { 1510 if (!mSystemReady) { 1511 mInitialBroadcast = new Intent(intent); 1512 } 1513 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1514 if (DBG) { 1515 log("sendStickyBroadcast: action=" + intent.getAction()); 1516 } 1517 1518 final long ident = Binder.clearCallingIdentity(); 1519 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1520 final IBatteryStats bs = BatteryStatsService.getService(); 1521 try { 1522 NetworkInfo ni = intent.getParcelableExtra( 1523 ConnectivityManager.EXTRA_NETWORK_INFO); 1524 bs.noteConnectivityChanged(intent.getIntExtra( 1525 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1526 ni != null ? ni.getState().toString() : "?"); 1527 } catch (RemoteException e) { 1528 } 1529 } 1530 try { 1531 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 1532 } finally { 1533 Binder.restoreCallingIdentity(ident); 1534 } 1535 } 1536 } 1537 1538 void systemReady() { 1539 // start network sampling .. 1540 Intent intent = new Intent(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED); 1541 intent.setPackage(mContext.getPackageName()); 1542 1543 mSampleIntervalElapsedIntent = PendingIntent.getBroadcast(mContext, 1544 SAMPLE_INTERVAL_ELAPSED_REQUEST_CODE, intent, 0); 1545 setAlarm(DEFAULT_START_SAMPLING_INTERVAL_IN_SECONDS * 1000, mSampleIntervalElapsedIntent); 1546 1547 loadGlobalProxy(); 1548 1549 synchronized(this) { 1550 mSystemReady = true; 1551 if (mInitialBroadcast != null) { 1552 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1553 mInitialBroadcast = null; 1554 } 1555 } 1556 // load the global proxy at startup 1557 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1558 1559 // Try bringing up tracker, but if KeyStore isn't ready yet, wait 1560 // for user to unlock device. 1561 if (!updateLockdownVpn()) { 1562 final IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT); 1563 mContext.registerReceiver(mUserPresentReceiver, filter); 1564 } 1565 1566 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1567 1568 mPermissionMonitor.startMonitoring(); 1569 } 1570 1571 private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() { 1572 @Override 1573 public void onReceive(Context context, Intent intent) { 1574 // Try creating lockdown tracker, since user present usually means 1575 // unlocked keystore. 1576 if (updateLockdownVpn()) { 1577 mContext.unregisterReceiver(this); 1578 } 1579 } 1580 }; 1581 1582 /** @hide */ 1583 @Override 1584 public void captivePortalCheckCompleted(NetworkInfo info, boolean isCaptivePortal) { 1585 enforceConnectivityInternalPermission(); 1586 if (DBG) log("captivePortalCheckCompleted: ni=" + info + " captive=" + isCaptivePortal); 1587// mNetTrackers[info.getType()].captivePortalCheckCompleted(isCaptivePortal); 1588 } 1589 1590 /** 1591 * Setup data activity tracking for the given network. 1592 * 1593 * Every {@code setupDataActivityTracking} should be paired with a 1594 * {@link #removeDataActivityTracking} for cleanup. 1595 */ 1596 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1597 final String iface = networkAgent.linkProperties.getInterfaceName(); 1598 1599 final int timeout; 1600 int type = ConnectivityManager.TYPE_NONE; 1601 1602 if (networkAgent.networkCapabilities.hasTransport( 1603 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1604 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1605 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1606 5); 1607 type = ConnectivityManager.TYPE_MOBILE; 1608 } else if (networkAgent.networkCapabilities.hasTransport( 1609 NetworkCapabilities.TRANSPORT_WIFI)) { 1610 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1611 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1612 0); 1613 type = ConnectivityManager.TYPE_WIFI; 1614 } else { 1615 // do not track any other networks 1616 timeout = 0; 1617 } 1618 1619 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1620 try { 1621 mNetd.addIdleTimer(iface, timeout, type); 1622 } catch (Exception e) { 1623 // You shall not crash! 1624 loge("Exception in setupDataActivityTracking " + e); 1625 } 1626 } 1627 } 1628 1629 /** 1630 * Remove data activity tracking when network disconnects. 1631 */ 1632 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1633 final String iface = networkAgent.linkProperties.getInterfaceName(); 1634 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1635 1636 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1637 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1638 try { 1639 // the call fails silently if no idletimer setup for this interface 1640 mNetd.removeIdleTimer(iface); 1641 } catch (Exception e) { 1642 loge("Exception in removeDataActivityTracking " + e); 1643 } 1644 } 1645 } 1646 1647 /** 1648 * Reads the network specific MTU size from reources. 1649 * and set it on it's iface. 1650 */ 1651 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1652 final String iface = newLp.getInterfaceName(); 1653 final int mtu = newLp.getMtu(); 1654 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1655 if (VDBG) log("identical MTU - not setting"); 1656 return; 1657 } 1658 1659 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1660 loge("Unexpected mtu value: " + mtu + ", " + iface); 1661 return; 1662 } 1663 1664 // Cannot set MTU without interface name 1665 if (TextUtils.isEmpty(iface)) { 1666 loge("Setting MTU size with null iface."); 1667 return; 1668 } 1669 1670 try { 1671 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1672 mNetd.setMtu(iface, mtu); 1673 } catch (Exception e) { 1674 Slog.e(TAG, "exception in setMtu()" + e); 1675 } 1676 } 1677 1678 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1679 1680 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1681 if (isDefaultNetwork(nai) == false) { 1682 return; 1683 } 1684 1685 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1686 String[] values = null; 1687 if (tcpBufferSizes != null) { 1688 values = tcpBufferSizes.split(","); 1689 } 1690 1691 if (values == null || values.length != 6) { 1692 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1693 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1694 values = tcpBufferSizes.split(","); 1695 } 1696 1697 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1698 1699 try { 1700 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1701 1702 final String prefix = "/sys/kernel/ipv4/tcp_"; 1703 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1704 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1705 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1706 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1707 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1708 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1709 mCurrentTcpBufferSizes = tcpBufferSizes; 1710 } catch (IOException e) { 1711 loge("Can't set TCP buffer sizes:" + e); 1712 } 1713 1714 final String defaultRwndKey = "net.tcp.default_init_rwnd"; 1715 int defaultRwndValue = SystemProperties.getInt(defaultRwndKey, 0); 1716 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1717 Settings.Global.TCP_DEFAULT_INIT_RWND, defaultRwndValue); 1718 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1719 if (rwndValue != 0) { 1720 SystemProperties.set(sysctlKey, rwndValue.toString()); 1721 } 1722 } 1723 1724 private void flushVmDnsCache() { 1725 /* 1726 * Tell the VMs to toss their DNS caches 1727 */ 1728 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1729 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1730 /* 1731 * Connectivity events can happen before boot has completed ... 1732 */ 1733 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1734 final long ident = Binder.clearCallingIdentity(); 1735 try { 1736 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1737 } finally { 1738 Binder.restoreCallingIdentity(ident); 1739 } 1740 } 1741 1742 @Override 1743 public int getRestoreDefaultNetworkDelay(int networkType) { 1744 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1745 NETWORK_RESTORE_DELAY_PROP_NAME); 1746 if(restoreDefaultNetworkDelayStr != null && 1747 restoreDefaultNetworkDelayStr.length() != 0) { 1748 try { 1749 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1750 } catch (NumberFormatException e) { 1751 } 1752 } 1753 // if the system property isn't set, use the value for the apn type 1754 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1755 1756 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1757 (mNetConfigs[networkType] != null)) { 1758 ret = mNetConfigs[networkType].restoreTime; 1759 } 1760 return ret; 1761 } 1762 1763 @Override 1764 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1765 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1766 if (mContext.checkCallingOrSelfPermission( 1767 android.Manifest.permission.DUMP) 1768 != PackageManager.PERMISSION_GRANTED) { 1769 pw.println("Permission Denial: can't dump ConnectivityService " + 1770 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1771 Binder.getCallingUid()); 1772 return; 1773 } 1774 1775 pw.println("NetworkFactories for:"); 1776 pw.increaseIndent(); 1777 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1778 pw.println(nfi.name); 1779 } 1780 pw.decreaseIndent(); 1781 pw.println(); 1782 1783 NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId); 1784 pw.print("Active default network: "); 1785 if (defaultNai == null) { 1786 pw.println("none"); 1787 } else { 1788 pw.println(defaultNai.network.netId); 1789 } 1790 pw.println(); 1791 1792 pw.println("Current Networks:"); 1793 pw.increaseIndent(); 1794 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1795 pw.println(nai.toString()); 1796 pw.increaseIndent(); 1797 pw.println("Requests:"); 1798 pw.increaseIndent(); 1799 for (int i = 0; i < nai.networkRequests.size(); i++) { 1800 pw.println(nai.networkRequests.valueAt(i).toString()); 1801 } 1802 pw.decreaseIndent(); 1803 pw.println("Lingered:"); 1804 pw.increaseIndent(); 1805 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1806 pw.decreaseIndent(); 1807 pw.decreaseIndent(); 1808 } 1809 pw.decreaseIndent(); 1810 pw.println(); 1811 1812 pw.println("Network Requests:"); 1813 pw.increaseIndent(); 1814 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1815 pw.println(nri.toString()); 1816 } 1817 pw.println(); 1818 pw.decreaseIndent(); 1819 1820 pw.println("mLegacyTypeTracker:"); 1821 pw.increaseIndent(); 1822 mLegacyTypeTracker.dump(pw); 1823 pw.decreaseIndent(); 1824 pw.println(); 1825 1826 synchronized (this) { 1827 pw.println("NetworkTransitionWakeLock is currently " + 1828 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held."); 1829 pw.println("It was last requested for "+mNetTransitionWakeLockCausedBy); 1830 } 1831 pw.println(); 1832 1833 mTethering.dump(fd, pw, args); 1834 1835 if (mInetLog != null) { 1836 pw.println(); 1837 pw.println("Inet condition reports:"); 1838 pw.increaseIndent(); 1839 for(int i = 0; i < mInetLog.size(); i++) { 1840 pw.println(mInetLog.get(i)); 1841 } 1842 pw.decreaseIndent(); 1843 } 1844 } 1845 1846 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, String msg) { 1847 if (nai.network == null) return false; 1848 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1849 if (officialNai != null && officialNai.equals(nai)) return true; 1850 if (officialNai != null || VDBG) { 1851 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1852 " - " + nai); 1853 } 1854 return false; 1855 } 1856 1857 private boolean isRequest(NetworkRequest request) { 1858 return mNetworkRequests.get(request).isRequest; 1859 } 1860 1861 // must be stateless - things change under us. 1862 private class NetworkStateTrackerHandler extends Handler { 1863 public NetworkStateTrackerHandler(Looper looper) { 1864 super(looper); 1865 } 1866 1867 @Override 1868 public void handleMessage(Message msg) { 1869 NetworkInfo info; 1870 switch (msg.what) { 1871 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1872 handleAsyncChannelHalfConnect(msg); 1873 break; 1874 } 1875 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1876 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1877 if (nai != null) nai.asyncChannel.disconnect(); 1878 break; 1879 } 1880 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1881 handleAsyncChannelDisconnected(msg); 1882 break; 1883 } 1884 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1885 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1886 if (nai == null) { 1887 loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent"); 1888 } else { 1889 updateCapabilities(nai, (NetworkCapabilities)msg.obj); 1890 } 1891 break; 1892 } 1893 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1894 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1895 if (nai == null) { 1896 loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED"); 1897 } else { 1898 if (VDBG) { 1899 log("Update of LinkProperties for " + nai.name() + 1900 "; created=" + nai.created); 1901 } 1902 LinkProperties oldLp = nai.linkProperties; 1903 synchronized (nai) { 1904 nai.linkProperties = (LinkProperties)msg.obj; 1905 } 1906 if (nai.created) updateLinkProperties(nai, oldLp); 1907 } 1908 break; 1909 } 1910 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1911 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1912 if (nai == null) { 1913 loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent"); 1914 break; 1915 } 1916 info = (NetworkInfo) msg.obj; 1917 updateNetworkInfo(nai, info); 1918 break; 1919 } 1920 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1921 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1922 if (nai == null) { 1923 loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent"); 1924 break; 1925 } 1926 Integer score = (Integer) msg.obj; 1927 if (score != null) updateNetworkScore(nai, score.intValue()); 1928 break; 1929 } 1930 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 1931 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1932 if (nai == null) { 1933 loge("EVENT_UID_RANGES_ADDED from unknown NetworkAgent"); 1934 break; 1935 } 1936 try { 1937 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1938 } catch (Exception e) { 1939 // Never crash! 1940 loge("Exception in addVpnUidRanges: " + e); 1941 } 1942 break; 1943 } 1944 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 1945 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1946 if (nai == null) { 1947 loge("EVENT_UID_RANGES_REMOVED from unknown NetworkAgent"); 1948 break; 1949 } 1950 try { 1951 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1952 } catch (Exception e) { 1953 // Never crash! 1954 loge("Exception in removeVpnUidRanges: " + e); 1955 } 1956 break; 1957 } 1958 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 1959 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1960 if (nai == null) { 1961 loge("EVENT_SET_EXPLICITLY_SELECTED from unknown NetworkAgent"); 1962 break; 1963 } 1964 if (nai.created && !nai.networkMisc.explicitlySelected) { 1965 loge("ERROR: created network explicitly selected."); 1966 } 1967 nai.networkMisc.explicitlySelected = true; 1968 break; 1969 } 1970 case NetworkMonitor.EVENT_NETWORK_TESTED: { 1971 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 1972 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_VALIDATED")) { 1973 boolean valid = (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 1974 nai.lastValidated = valid; 1975 if (valid) { 1976 if (DBG) log("Validated " + nai.name()); 1977 if (!nai.everValidated) { 1978 nai.everValidated = true; 1979 rematchNetworkAndRequests(nai, NascentState.JUST_VALIDATED, 1980 ReapUnvalidatedNetworks.REAP); 1981 // If score has changed, rebroadcast to NetworkFactories. b/17726566 1982 sendUpdatedScoreToFactories(nai); 1983 } 1984 } 1985 updateInetCondition(nai); 1986 // Let the NetworkAgent know the state of its network 1987 nai.asyncChannel.sendMessage( 1988 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 1989 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 1990 0, null); 1991 } 1992 break; 1993 } 1994 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 1995 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 1996 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_LINGER_COMPLETE")) { 1997 handleLingerComplete(nai); 1998 } 1999 break; 2000 } 2001 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2002 if (msg.arg1 == 0) { 2003 setProvNotificationVisibleIntent(false, msg.arg2, 0, null, null); 2004 } else { 2005 NetworkAgentInfo nai = null; 2006 synchronized (mNetworkForNetId) { 2007 nai = mNetworkForNetId.get(msg.arg2); 2008 } 2009 if (nai == null) { 2010 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2011 break; 2012 } 2013 setProvNotificationVisibleIntent(true, msg.arg2, nai.networkInfo.getType(), 2014 nai.networkInfo.getExtraInfo(), (PendingIntent)msg.obj); 2015 } 2016 break; 2017 } 2018 case NetworkStateTracker.EVENT_STATE_CHANGED: { 2019 info = (NetworkInfo) msg.obj; 2020 NetworkInfo.State state = info.getState(); 2021 2022 if (VDBG || (state == NetworkInfo.State.CONNECTED) || 2023 (state == NetworkInfo.State.DISCONNECTED) || 2024 (state == NetworkInfo.State.SUSPENDED)) { 2025 log("ConnectivityChange for " + 2026 info.getTypeName() + ": " + 2027 state + "/" + info.getDetailedState()); 2028 } 2029 2030 EventLogTags.writeConnectivityStateChanged( 2031 info.getType(), info.getSubtype(), info.getDetailedState().ordinal()); 2032 2033 if (info.isConnectedToProvisioningNetwork()) { 2034 /** 2035 * TODO: Create ConnectivityManager.TYPE_MOBILE_PROVISIONING 2036 * for now its an in between network, its a network that 2037 * is actually a default network but we don't want it to be 2038 * announced as such to keep background applications from 2039 * trying to use it. It turns out that some still try so we 2040 * take the additional step of clearing any default routes 2041 * to the link that may have incorrectly setup by the lower 2042 * levels. 2043 */ 2044 LinkProperties lp = getLinkPropertiesForType(info.getType()); 2045 if (DBG) { 2046 log("EVENT_STATE_CHANGED: connected to provisioning network, lp=" + lp); 2047 } 2048 2049 // Clear any default routes setup by the radio so 2050 // any activity by applications trying to use this 2051 // connection will fail until the provisioning network 2052 // is enabled. 2053 /* 2054 for (RouteInfo r : lp.getRoutes()) { 2055 removeRoute(lp, r, TO_DEFAULT_TABLE, 2056 mNetTrackers[info.getType()].getNetwork().netId); 2057 } 2058 */ 2059 } else if (state == NetworkInfo.State.DISCONNECTED) { 2060 } else if (state == NetworkInfo.State.SUSPENDED) { 2061 } else if (state == NetworkInfo.State.CONNECTED) { 2062 // handleConnect(info); 2063 } 2064 notifyLockdownVpn(null); 2065 break; 2066 } 2067 case NetworkStateTracker.EVENT_CONFIGURATION_CHANGED: { 2068 info = (NetworkInfo) msg.obj; 2069 // TODO: Temporary allowing network configuration 2070 // change not resetting sockets. 2071 // @see bug/4455071 2072 /* 2073 handleConnectivityChange(info.getType(), mCurrentLinkProperties[info.getType()], 2074 false); 2075 */ 2076 break; 2077 } 2078 } 2079 } 2080 } 2081 2082 // Cancel any lingering so the linger timeout doesn't teardown a network. 2083 // This should be called when a network begins satisfying a NetworkRequest. 2084 // Note: depending on what state the NetworkMonitor is in (e.g., 2085 // if it's awaiting captive portal login, or if validation failed), this 2086 // may trigger a re-evaluation of the network. 2087 private void unlinger(NetworkAgentInfo nai) { 2088 if (VDBG) log("Canceling linger of " + nai.name()); 2089 // If network has never been validated, it cannot have been lingered, so don't bother 2090 // needlessly triggering a re-evaluation. 2091 if (!nai.everValidated) return; 2092 nai.networkLingered.clear(); 2093 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2094 } 2095 2096 private void handleAsyncChannelHalfConnect(Message msg) { 2097 AsyncChannel ac = (AsyncChannel) msg.obj; 2098 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2099 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2100 if (VDBG) log("NetworkFactory connected"); 2101 // A network factory has connected. Send it all current NetworkRequests. 2102 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2103 if (nri.isRequest == false) continue; 2104 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2105 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2106 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2107 } 2108 } else { 2109 loge("Error connecting NetworkFactory"); 2110 mNetworkFactoryInfos.remove(msg.obj); 2111 } 2112 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2113 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2114 if (VDBG) log("NetworkAgent connected"); 2115 // A network agent has requested a connection. Establish the connection. 2116 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2117 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2118 } else { 2119 loge("Error connecting NetworkAgent"); 2120 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2121 if (nai != null) { 2122 synchronized (mNetworkForNetId) { 2123 mNetworkForNetId.remove(nai.network.netId); 2124 } 2125 // Just in case. 2126 mLegacyTypeTracker.remove(nai); 2127 } 2128 } 2129 } 2130 } 2131 2132 private void handleAsyncChannelDisconnected(Message msg) { 2133 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2134 if (nai != null) { 2135 if (DBG) { 2136 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2137 } 2138 // A network agent has disconnected. 2139 if (nai.created) { 2140 // Tell netd to clean up the configuration for this network 2141 // (routing rules, DNS, etc). 2142 try { 2143 mNetd.removeNetwork(nai.network.netId); 2144 } catch (Exception e) { 2145 loge("Exception removing network: " + e); 2146 } 2147 } 2148 // TODO - if we move the logic to the network agent (have them disconnect 2149 // because they lost all their requests or because their score isn't good) 2150 // then they would disconnect organically, report their new state and then 2151 // disconnect the channel. 2152 if (nai.networkInfo.isConnected()) { 2153 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2154 null, null); 2155 } 2156 if (isDefaultNetwork(nai)) { 2157 mDefaultInetConditionPublished = 0; 2158 } 2159 notifyIfacesChanged(); 2160 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2161 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2162 mNetworkAgentInfos.remove(msg.replyTo); 2163 updateClat(null, nai.linkProperties, nai); 2164 mLegacyTypeTracker.remove(nai); 2165 synchronized (mNetworkForNetId) { 2166 mNetworkForNetId.remove(nai.network.netId); 2167 } 2168 // Since we've lost the network, go through all the requests that 2169 // it was satisfying and see if any other factory can satisfy them. 2170 // TODO: This logic may be better replaced with a call to rematchAllNetworksAndRequests 2171 final ArrayList<NetworkAgentInfo> toActivate = new ArrayList<NetworkAgentInfo>(); 2172 for (int i = 0; i < nai.networkRequests.size(); i++) { 2173 NetworkRequest request = nai.networkRequests.valueAt(i); 2174 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2175 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2176 if (DBG) { 2177 log("Checking for replacement network to handle request " + request ); 2178 } 2179 mNetworkForRequestId.remove(request.requestId); 2180 sendUpdatedScoreToFactories(request, 0); 2181 NetworkAgentInfo alternative = null; 2182 for (NetworkAgentInfo existing : mNetworkAgentInfos.values()) { 2183 if (existing.satisfies(request) && 2184 (alternative == null || 2185 alternative.getCurrentScore() < existing.getCurrentScore())) { 2186 alternative = existing; 2187 } 2188 } 2189 if (alternative != null) { 2190 if (DBG) log(" found replacement in " + alternative.name()); 2191 if (!toActivate.contains(alternative)) { 2192 toActivate.add(alternative); 2193 } 2194 } 2195 } 2196 } 2197 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2198 removeDataActivityTracking(nai); 2199 notifyLockdownVpn(nai); 2200 requestNetworkTransitionWakelock(nai.name()); 2201 } 2202 for (NetworkAgentInfo networkToActivate : toActivate) { 2203 unlinger(networkToActivate); 2204 rematchNetworkAndRequests(networkToActivate, NascentState.NOT_JUST_VALIDATED, 2205 ReapUnvalidatedNetworks.DONT_REAP); 2206 } 2207 } 2208 } 2209 2210 // If this method proves to be too slow then we can maintain a separate 2211 // pendingIntent => NetworkRequestInfo map. 2212 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2213 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2214 Intent intent = pendingIntent.getIntent(); 2215 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2216 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2217 if (existingPendingIntent != null && 2218 existingPendingIntent.getIntent().filterEquals(intent)) { 2219 return entry.getValue(); 2220 } 2221 } 2222 return null; 2223 } 2224 2225 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2226 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2227 2228 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2229 if (existingRequest != null) { // remove the existing request. 2230 if (DBG) log("Replacing " + existingRequest.request + " with " 2231 + nri.request + " because their intents matched."); 2232 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2233 } 2234 handleRegisterNetworkRequest(msg); 2235 } 2236 2237 private void handleRegisterNetworkRequest(Message msg) { 2238 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2239 2240 mNetworkRequests.put(nri.request, nri); 2241 2242 // TODO: This logic may be better replaced with a call to rematchNetworkAndRequests 2243 2244 // Check for the best currently alive network that satisfies this request 2245 NetworkAgentInfo bestNetwork = null; 2246 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2247 if (DBG) log("handleRegisterNetworkRequest checking " + network.name()); 2248 if (network.satisfies(nri.request)) { 2249 if (DBG) log("apparently satisfied. currentScore=" + network.getCurrentScore()); 2250 if (!nri.isRequest) { 2251 // Not setting bestNetwork here as a listening NetworkRequest may be 2252 // satisfied by multiple Networks. Instead the request is added to 2253 // each satisfying Network and notified about each. 2254 network.addRequest(nri.request); 2255 notifyNetworkCallback(network, nri); 2256 } else if (bestNetwork == null || 2257 bestNetwork.getCurrentScore() < network.getCurrentScore()) { 2258 bestNetwork = network; 2259 } 2260 } 2261 } 2262 if (bestNetwork != null) { 2263 if (DBG) log("using " + bestNetwork.name()); 2264 unlinger(bestNetwork); 2265 bestNetwork.addRequest(nri.request); 2266 mNetworkForRequestId.put(nri.request.requestId, bestNetwork); 2267 notifyNetworkCallback(bestNetwork, nri); 2268 if (nri.request.legacyType != TYPE_NONE) { 2269 mLegacyTypeTracker.add(nri.request.legacyType, bestNetwork); 2270 } 2271 } 2272 2273 if (nri.isRequest) { 2274 if (DBG) log("sending new NetworkRequest to factories"); 2275 final int score = bestNetwork == null ? 0 : bestNetwork.getCurrentScore(); 2276 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2277 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 2278 0, nri.request); 2279 } 2280 } 2281 } 2282 2283 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2284 int callingUid) { 2285 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2286 if (nri != null) { 2287 handleReleaseNetworkRequest(nri.request, callingUid); 2288 } 2289 } 2290 2291 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2292 // For validated Networks this is simply whether it is satsifying any NetworkRequests. 2293 // For unvalidated Networks this is whether it is satsifying any NetworkRequests or 2294 // were it to become validated, would it have a chance of satisfying any NetworkRequests. 2295 private boolean unneeded(NetworkAgentInfo nai) { 2296 if (!nai.created || nai.isVPN()) return false; 2297 boolean unneeded = true; 2298 if (nai.everValidated) { 2299 for (int i = 0; i < nai.networkRequests.size() && unneeded; i++) { 2300 final NetworkRequest nr = nai.networkRequests.valueAt(i); 2301 try { 2302 if (isRequest(nr)) unneeded = false; 2303 } catch (Exception e) { 2304 loge("Request " + nr + " not found in mNetworkRequests."); 2305 loge(" it came from request list of " + nai.name()); 2306 } 2307 } 2308 } else { 2309 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2310 // If this Network is already the highest scoring Network for a request, or if 2311 // there is hope for it to become one if it validated, then it is needed. 2312 if (nri.isRequest && nai.satisfies(nri.request) && 2313 (nai.networkRequests.get(nri.request.requestId) != null || 2314 // Note that this catches two important cases: 2315 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2316 // is currently satisfying the request. This is desirable when 2317 // cellular ends up validating but WiFi does not. 2318 // 2. Unvalidated WiFi will not be reaped when validated cellular 2319 // is currently satsifying the request. This is desirable when 2320 // WiFi ends up validating and out scoring cellular. 2321 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2322 nai.getCurrentScoreAsValidated())) { 2323 unneeded = false; 2324 break; 2325 } 2326 } 2327 } 2328 return unneeded; 2329 } 2330 2331 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2332 NetworkRequestInfo nri = mNetworkRequests.get(request); 2333 if (nri != null) { 2334 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2335 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2336 return; 2337 } 2338 if (DBG) log("releasing NetworkRequest " + request); 2339 nri.unlinkDeathRecipient(); 2340 mNetworkRequests.remove(request); 2341 if (nri.isRequest) { 2342 // Find all networks that are satisfying this request and remove the request 2343 // from their request lists. 2344 // TODO - it's my understanding that for a request there is only a single 2345 // network satisfying it, so this loop is wasteful 2346 boolean wasKept = false; 2347 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2348 if (nai.networkRequests.get(nri.request.requestId) != null) { 2349 nai.networkRequests.remove(nri.request.requestId); 2350 if (DBG) { 2351 log(" Removing from current network " + nai.name() + 2352 ", leaving " + nai.networkRequests.size() + 2353 " requests."); 2354 } 2355 if (unneeded(nai)) { 2356 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2357 teardownUnneededNetwork(nai); 2358 } else { 2359 // suspect there should only be one pass through here 2360 // but if any were kept do the check below 2361 wasKept |= true; 2362 } 2363 } 2364 } 2365 2366 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2367 if (nai != null) { 2368 mNetworkForRequestId.remove(nri.request.requestId); 2369 } 2370 // Maintain the illusion. When this request arrived, we might have pretended 2371 // that a network connected to serve it, even though the network was already 2372 // connected. Now that this request has gone away, we might have to pretend 2373 // that the network disconnected. LegacyTypeTracker will generate that 2374 // phantom disconnect for this type. 2375 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2376 boolean doRemove = true; 2377 if (wasKept) { 2378 // check if any of the remaining requests for this network are for the 2379 // same legacy type - if so, don't remove the nai 2380 for (int i = 0; i < nai.networkRequests.size(); i++) { 2381 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2382 if (otherRequest.legacyType == nri.request.legacyType && 2383 isRequest(otherRequest)) { 2384 if (DBG) log(" still have other legacy request - leaving"); 2385 doRemove = false; 2386 } 2387 } 2388 } 2389 2390 if (doRemove) { 2391 mLegacyTypeTracker.remove(nri.request.legacyType, nai); 2392 } 2393 } 2394 2395 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2396 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2397 nri.request); 2398 } 2399 } else { 2400 // listens don't have a singular affectedNetwork. Check all networks to see 2401 // if this listen request applies and remove it. 2402 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2403 nai.networkRequests.remove(nri.request.requestId); 2404 } 2405 } 2406 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2407 } 2408 } 2409 2410 private class InternalHandler extends Handler { 2411 public InternalHandler(Looper looper) { 2412 super(looper); 2413 } 2414 2415 @Override 2416 public void handleMessage(Message msg) { 2417 switch (msg.what) { 2418 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2419 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2420 String causedBy = null; 2421 synchronized (ConnectivityService.this) { 2422 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2423 mNetTransitionWakeLock.isHeld()) { 2424 mNetTransitionWakeLock.release(); 2425 causedBy = mNetTransitionWakeLockCausedBy; 2426 } else { 2427 break; 2428 } 2429 } 2430 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2431 log("Failed to find a new network - expiring NetTransition Wakelock"); 2432 } else { 2433 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2434 " cleared because we found a replacement network"); 2435 } 2436 break; 2437 } 2438 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2439 handleDeprecatedGlobalHttpProxy(); 2440 break; 2441 } 2442 case EVENT_SET_DEPENDENCY_MET: { 2443 boolean met = (msg.arg1 == ENABLED); 2444 handleSetDependencyMet(msg.arg2, met); 2445 break; 2446 } 2447 case EVENT_SEND_STICKY_BROADCAST_INTENT: { 2448 Intent intent = (Intent)msg.obj; 2449 sendStickyBroadcast(intent); 2450 break; 2451 } 2452 case EVENT_ENABLE_FAIL_FAST_MOBILE_DATA: { 2453 int tag = mEnableFailFastMobileDataTag.get(); 2454 if (msg.arg1 == tag) { 2455 MobileDataStateTracker mobileDst = 2456 (MobileDataStateTracker) mNetTrackers[ConnectivityManager.TYPE_MOBILE]; 2457 if (mobileDst != null) { 2458 mobileDst.setEnableFailFastMobileData(msg.arg2); 2459 } 2460 } else { 2461 log("EVENT_ENABLE_FAIL_FAST_MOBILE_DATA: stale arg1:" + msg.arg1 2462 + " != tag:" + tag); 2463 } 2464 break; 2465 } 2466 case EVENT_SAMPLE_INTERVAL_ELAPSED: { 2467 handleNetworkSamplingTimeout(); 2468 break; 2469 } 2470 case EVENT_PROXY_HAS_CHANGED: { 2471 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2472 break; 2473 } 2474 case EVENT_REGISTER_NETWORK_FACTORY: { 2475 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2476 break; 2477 } 2478 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2479 handleUnregisterNetworkFactory((Messenger)msg.obj); 2480 break; 2481 } 2482 case EVENT_REGISTER_NETWORK_AGENT: { 2483 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2484 break; 2485 } 2486 case EVENT_REGISTER_NETWORK_REQUEST: 2487 case EVENT_REGISTER_NETWORK_LISTENER: { 2488 handleRegisterNetworkRequest(msg); 2489 break; 2490 } 2491 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: { 2492 handleRegisterNetworkRequestWithIntent(msg); 2493 break; 2494 } 2495 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2496 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2497 break; 2498 } 2499 case EVENT_RELEASE_NETWORK_REQUEST: { 2500 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2501 break; 2502 } 2503 case EVENT_SYSTEM_READY: { 2504 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2505 nai.networkMonitor.systemReady = true; 2506 } 2507 break; 2508 } 2509 } 2510 } 2511 } 2512 2513 // javadoc from interface 2514 public int tether(String iface) { 2515 ConnectivityManager.enforceTetherChangePermission(mContext); 2516 if (isTetheringSupported()) { 2517 return mTethering.tether(iface); 2518 } else { 2519 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2520 } 2521 } 2522 2523 // javadoc from interface 2524 public int untether(String iface) { 2525 ConnectivityManager.enforceTetherChangePermission(mContext); 2526 2527 if (isTetheringSupported()) { 2528 return mTethering.untether(iface); 2529 } else { 2530 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2531 } 2532 } 2533 2534 // javadoc from interface 2535 public int getLastTetherError(String iface) { 2536 enforceTetherAccessPermission(); 2537 2538 if (isTetheringSupported()) { 2539 return mTethering.getLastTetherError(iface); 2540 } else { 2541 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2542 } 2543 } 2544 2545 // TODO - proper iface API for selection by property, inspection, etc 2546 public String[] getTetherableUsbRegexs() { 2547 enforceTetherAccessPermission(); 2548 if (isTetheringSupported()) { 2549 return mTethering.getTetherableUsbRegexs(); 2550 } else { 2551 return new String[0]; 2552 } 2553 } 2554 2555 public String[] getTetherableWifiRegexs() { 2556 enforceTetherAccessPermission(); 2557 if (isTetheringSupported()) { 2558 return mTethering.getTetherableWifiRegexs(); 2559 } else { 2560 return new String[0]; 2561 } 2562 } 2563 2564 public String[] getTetherableBluetoothRegexs() { 2565 enforceTetherAccessPermission(); 2566 if (isTetheringSupported()) { 2567 return mTethering.getTetherableBluetoothRegexs(); 2568 } else { 2569 return new String[0]; 2570 } 2571 } 2572 2573 public int setUsbTethering(boolean enable) { 2574 ConnectivityManager.enforceTetherChangePermission(mContext); 2575 if (isTetheringSupported()) { 2576 return mTethering.setUsbTethering(enable); 2577 } else { 2578 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2579 } 2580 } 2581 2582 // TODO - move iface listing, queries, etc to new module 2583 // javadoc from interface 2584 public String[] getTetherableIfaces() { 2585 enforceTetherAccessPermission(); 2586 return mTethering.getTetherableIfaces(); 2587 } 2588 2589 public String[] getTetheredIfaces() { 2590 enforceTetherAccessPermission(); 2591 return mTethering.getTetheredIfaces(); 2592 } 2593 2594 public String[] getTetheringErroredIfaces() { 2595 enforceTetherAccessPermission(); 2596 return mTethering.getErroredIfaces(); 2597 } 2598 2599 public String[] getTetheredDhcpRanges() { 2600 enforceConnectivityInternalPermission(); 2601 return mTethering.getTetheredDhcpRanges(); 2602 } 2603 2604 // if ro.tether.denied = true we default to no tethering 2605 // gservices could set the secure setting to 1 though to enable it on a build where it 2606 // had previously been turned off. 2607 public boolean isTetheringSupported() { 2608 enforceTetherAccessPermission(); 2609 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2610 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2611 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2612 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2613 return tetherEnabledInSettings && ((mTethering.getTetherableUsbRegexs().length != 0 || 2614 mTethering.getTetherableWifiRegexs().length != 0 || 2615 mTethering.getTetherableBluetoothRegexs().length != 0) && 2616 mTethering.getUpstreamIfaceTypes().length != 0); 2617 } 2618 2619 // Called when we lose the default network and have no replacement yet. 2620 // This will automatically be cleared after X seconds or a new default network 2621 // becomes CONNECTED, whichever happens first. The timer is started by the 2622 // first caller and not restarted by subsequent callers. 2623 private void requestNetworkTransitionWakelock(String forWhom) { 2624 int serialNum = 0; 2625 synchronized (this) { 2626 if (mNetTransitionWakeLock.isHeld()) return; 2627 serialNum = ++mNetTransitionWakeLockSerialNumber; 2628 mNetTransitionWakeLock.acquire(); 2629 mNetTransitionWakeLockCausedBy = forWhom; 2630 } 2631 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2632 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2633 mNetTransitionWakeLockTimeout); 2634 return; 2635 } 2636 2637 // 100 percent is full good, 0 is full bad. 2638 public void reportInetCondition(int networkType, int percentage) { 2639 if (percentage > 50) return; // don't handle good network reports 2640 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2641 if (nai != null) reportBadNetwork(nai.network); 2642 } 2643 2644 public void reportBadNetwork(Network network) { 2645 enforceAccessPermission(); 2646 enforceInternetPermission(); 2647 2648 if (network == null) return; 2649 2650 final int uid = Binder.getCallingUid(); 2651 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2652 if (nai == null) return; 2653 if (DBG) log("reportBadNetwork(" + nai.name() + ") by " + uid); 2654 synchronized (nai) { 2655 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2656 // which isn't meant to work on uncreated networks. 2657 if (!nai.created) return; 2658 2659 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2660 2661 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2662 } 2663 } 2664 2665 public ProxyInfo getDefaultProxy() { 2666 // this information is already available as a world read/writable jvm property 2667 // so this API change wouldn't have a benifit. It also breaks the passing 2668 // of proxy info to all the JVMs. 2669 // enforceAccessPermission(); 2670 synchronized (mProxyLock) { 2671 ProxyInfo ret = mGlobalProxy; 2672 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2673 return ret; 2674 } 2675 } 2676 2677 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2678 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2679 // proxy is null then there is no proxy in place). 2680 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2681 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2682 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2683 proxy = null; 2684 } 2685 return proxy; 2686 } 2687 2688 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2689 // better for determining if a new proxy broadcast is necessary: 2690 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2691 // avoid unnecessary broadcasts. 2692 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2693 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2694 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2695 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2696 // all set. 2697 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2698 a = canonicalizeProxyInfo(a); 2699 b = canonicalizeProxyInfo(b); 2700 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2701 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2702 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2703 } 2704 2705 public void setGlobalProxy(ProxyInfo proxyProperties) { 2706 enforceConnectivityInternalPermission(); 2707 2708 synchronized (mProxyLock) { 2709 if (proxyProperties == mGlobalProxy) return; 2710 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2711 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2712 2713 String host = ""; 2714 int port = 0; 2715 String exclList = ""; 2716 String pacFileUrl = ""; 2717 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2718 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2719 if (!proxyProperties.isValid()) { 2720 if (DBG) 2721 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2722 return; 2723 } 2724 mGlobalProxy = new ProxyInfo(proxyProperties); 2725 host = mGlobalProxy.getHost(); 2726 port = mGlobalProxy.getPort(); 2727 exclList = mGlobalProxy.getExclusionListAsString(); 2728 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2729 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2730 } 2731 } else { 2732 mGlobalProxy = null; 2733 } 2734 ContentResolver res = mContext.getContentResolver(); 2735 final long token = Binder.clearCallingIdentity(); 2736 try { 2737 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2738 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2739 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2740 exclList); 2741 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2742 } finally { 2743 Binder.restoreCallingIdentity(token); 2744 } 2745 2746 if (mGlobalProxy == null) { 2747 proxyProperties = mDefaultProxy; 2748 } 2749 sendProxyBroadcast(proxyProperties); 2750 } 2751 } 2752 2753 private void loadGlobalProxy() { 2754 ContentResolver res = mContext.getContentResolver(); 2755 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2756 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2757 String exclList = Settings.Global.getString(res, 2758 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2759 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2760 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2761 ProxyInfo proxyProperties; 2762 if (!TextUtils.isEmpty(pacFileUrl)) { 2763 proxyProperties = new ProxyInfo(pacFileUrl); 2764 } else { 2765 proxyProperties = new ProxyInfo(host, port, exclList); 2766 } 2767 if (!proxyProperties.isValid()) { 2768 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2769 return; 2770 } 2771 2772 synchronized (mProxyLock) { 2773 mGlobalProxy = proxyProperties; 2774 } 2775 } 2776 } 2777 2778 public ProxyInfo getGlobalProxy() { 2779 // this information is already available as a world read/writable jvm property 2780 // so this API change wouldn't have a benifit. It also breaks the passing 2781 // of proxy info to all the JVMs. 2782 // enforceAccessPermission(); 2783 synchronized (mProxyLock) { 2784 return mGlobalProxy; 2785 } 2786 } 2787 2788 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2789 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2790 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2791 proxy = null; 2792 } 2793 synchronized (mProxyLock) { 2794 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2795 if (mDefaultProxy == proxy) return; // catches repeated nulls 2796 if (proxy != null && !proxy.isValid()) { 2797 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2798 return; 2799 } 2800 2801 // This call could be coming from the PacManager, containing the port of the local 2802 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2803 // global (to get the correct local port), and send a broadcast. 2804 // TODO: Switch PacManager to have its own message to send back rather than 2805 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2806 if ((mGlobalProxy != null) && (proxy != null) 2807 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2808 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2809 mGlobalProxy = proxy; 2810 sendProxyBroadcast(mGlobalProxy); 2811 return; 2812 } 2813 mDefaultProxy = proxy; 2814 2815 if (mGlobalProxy != null) return; 2816 if (!mDefaultProxyDisabled) { 2817 sendProxyBroadcast(proxy); 2818 } 2819 } 2820 } 2821 2822 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2823 // This method gets called when any network changes proxy, but the broadcast only ever contains 2824 // the default proxy (even if it hasn't changed). 2825 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2826 // world where an app might be bound to a non-default network. 2827 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2828 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2829 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2830 2831 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2832 sendProxyBroadcast(getDefaultProxy()); 2833 } 2834 } 2835 2836 private void handleDeprecatedGlobalHttpProxy() { 2837 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2838 Settings.Global.HTTP_PROXY); 2839 if (!TextUtils.isEmpty(proxy)) { 2840 String data[] = proxy.split(":"); 2841 if (data.length == 0) { 2842 return; 2843 } 2844 2845 String proxyHost = data[0]; 2846 int proxyPort = 8080; 2847 if (data.length > 1) { 2848 try { 2849 proxyPort = Integer.parseInt(data[1]); 2850 } catch (NumberFormatException e) { 2851 return; 2852 } 2853 } 2854 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2855 setGlobalProxy(p); 2856 } 2857 } 2858 2859 private void sendProxyBroadcast(ProxyInfo proxy) { 2860 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2861 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2862 if (DBG) log("sending Proxy Broadcast for " + proxy); 2863 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2864 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2865 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2866 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2867 final long ident = Binder.clearCallingIdentity(); 2868 try { 2869 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2870 } finally { 2871 Binder.restoreCallingIdentity(ident); 2872 } 2873 } 2874 2875 private static class SettingsObserver extends ContentObserver { 2876 private int mWhat; 2877 private Handler mHandler; 2878 SettingsObserver(Handler handler, int what) { 2879 super(handler); 2880 mHandler = handler; 2881 mWhat = what; 2882 } 2883 2884 void observe(Context context) { 2885 ContentResolver resolver = context.getContentResolver(); 2886 resolver.registerContentObserver(Settings.Global.getUriFor( 2887 Settings.Global.HTTP_PROXY), false, this); 2888 } 2889 2890 @Override 2891 public void onChange(boolean selfChange) { 2892 mHandler.obtainMessage(mWhat).sendToTarget(); 2893 } 2894 } 2895 2896 private static void log(String s) { 2897 Slog.d(TAG, s); 2898 } 2899 2900 private static void loge(String s) { 2901 Slog.e(TAG, s); 2902 } 2903 2904 private static <T> T checkNotNull(T value, String message) { 2905 if (value == null) { 2906 throw new NullPointerException(message); 2907 } 2908 return value; 2909 } 2910 2911 /** 2912 * Prepare for a VPN application. 2913 * Permissions are checked in Vpn class. 2914 * @hide 2915 */ 2916 @Override 2917 public boolean prepareVpn(String oldPackage, String newPackage) { 2918 throwIfLockdownEnabled(); 2919 int user = UserHandle.getUserId(Binder.getCallingUid()); 2920 synchronized(mVpns) { 2921 return mVpns.get(user).prepare(oldPackage, newPackage); 2922 } 2923 } 2924 2925 /** 2926 * Set whether the current VPN package has the ability to launch VPNs without 2927 * user intervention. This method is used by system-privileged apps. 2928 * Permissions are checked in Vpn class. 2929 * @hide 2930 */ 2931 @Override 2932 public void setVpnPackageAuthorization(boolean authorized) { 2933 int user = UserHandle.getUserId(Binder.getCallingUid()); 2934 synchronized(mVpns) { 2935 mVpns.get(user).setPackageAuthorization(authorized); 2936 } 2937 } 2938 2939 /** 2940 * Configure a TUN interface and return its file descriptor. Parameters 2941 * are encoded and opaque to this class. This method is used by VpnBuilder 2942 * and not available in ConnectivityManager. Permissions are checked in 2943 * Vpn class. 2944 * @hide 2945 */ 2946 @Override 2947 public ParcelFileDescriptor establishVpn(VpnConfig config) { 2948 throwIfLockdownEnabled(); 2949 int user = UserHandle.getUserId(Binder.getCallingUid()); 2950 synchronized(mVpns) { 2951 return mVpns.get(user).establish(config); 2952 } 2953 } 2954 2955 /** 2956 * Start legacy VPN, controlling native daemons as needed. Creates a 2957 * secondary thread to perform connection work, returning quickly. 2958 */ 2959 @Override 2960 public void startLegacyVpn(VpnProfile profile) { 2961 throwIfLockdownEnabled(); 2962 final LinkProperties egress = getActiveLinkProperties(); 2963 if (egress == null) { 2964 throw new IllegalStateException("Missing active network connection"); 2965 } 2966 int user = UserHandle.getUserId(Binder.getCallingUid()); 2967 synchronized(mVpns) { 2968 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 2969 } 2970 } 2971 2972 /** 2973 * Return the information of the ongoing legacy VPN. This method is used 2974 * by VpnSettings and not available in ConnectivityManager. Permissions 2975 * are checked in Vpn class. 2976 * @hide 2977 */ 2978 @Override 2979 public LegacyVpnInfo getLegacyVpnInfo() { 2980 throwIfLockdownEnabled(); 2981 int user = UserHandle.getUserId(Binder.getCallingUid()); 2982 synchronized(mVpns) { 2983 return mVpns.get(user).getLegacyVpnInfo(); 2984 } 2985 } 2986 2987 /** 2988 * Returns the information of the ongoing VPN. This method is used by VpnDialogs and 2989 * not available in ConnectivityManager. 2990 * Permissions are checked in Vpn class. 2991 * @hide 2992 */ 2993 @Override 2994 public VpnConfig getVpnConfig() { 2995 int user = UserHandle.getUserId(Binder.getCallingUid()); 2996 synchronized(mVpns) { 2997 return mVpns.get(user).getVpnConfig(); 2998 } 2999 } 3000 3001 @Override 3002 public boolean updateLockdownVpn() { 3003 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3004 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3005 return false; 3006 } 3007 3008 // Tear down existing lockdown if profile was removed 3009 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3010 if (mLockdownEnabled) { 3011 if (!mKeyStore.isUnlocked()) { 3012 Slog.w(TAG, "KeyStore locked; unable to create LockdownTracker"); 3013 return false; 3014 } 3015 3016 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3017 final VpnProfile profile = VpnProfile.decode( 3018 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3019 int user = UserHandle.getUserId(Binder.getCallingUid()); 3020 synchronized(mVpns) { 3021 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, mVpns.get(user), 3022 profile)); 3023 } 3024 } else { 3025 setLockdownTracker(null); 3026 } 3027 3028 return true; 3029 } 3030 3031 /** 3032 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3033 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3034 */ 3035 private void setLockdownTracker(LockdownVpnTracker tracker) { 3036 // Shutdown any existing tracker 3037 final LockdownVpnTracker existing = mLockdownTracker; 3038 mLockdownTracker = null; 3039 if (existing != null) { 3040 existing.shutdown(); 3041 } 3042 3043 try { 3044 if (tracker != null) { 3045 mNetd.setFirewallEnabled(true); 3046 mNetd.setFirewallInterfaceRule("lo", true); 3047 mLockdownTracker = tracker; 3048 mLockdownTracker.init(); 3049 } else { 3050 mNetd.setFirewallEnabled(false); 3051 } 3052 } catch (RemoteException e) { 3053 // ignored; NMS lives inside system_server 3054 } 3055 } 3056 3057 private void throwIfLockdownEnabled() { 3058 if (mLockdownEnabled) { 3059 throw new IllegalStateException("Unavailable in lockdown mode"); 3060 } 3061 } 3062 3063 public void supplyMessenger(int networkType, Messenger messenger) { 3064 enforceConnectivityInternalPermission(); 3065 3066 if (isNetworkTypeValid(networkType) && mNetTrackers[networkType] != null) { 3067 mNetTrackers[networkType].supplyMessenger(messenger); 3068 } 3069 } 3070 3071 public int findConnectionTypeForIface(String iface) { 3072 enforceConnectivityInternalPermission(); 3073 3074 if (TextUtils.isEmpty(iface)) return ConnectivityManager.TYPE_NONE; 3075 3076 synchronized(mNetworkForNetId) { 3077 for (int i = 0; i < mNetworkForNetId.size(); i++) { 3078 NetworkAgentInfo nai = mNetworkForNetId.valueAt(i); 3079 LinkProperties lp = nai.linkProperties; 3080 if (lp != null && iface.equals(lp.getInterfaceName()) && nai.networkInfo != null) { 3081 return nai.networkInfo.getType(); 3082 } 3083 } 3084 } 3085 return ConnectivityManager.TYPE_NONE; 3086 } 3087 3088 /** 3089 * Have mobile data fail fast if enabled. 3090 * 3091 * @param enabled DctConstants.ENABLED/DISABLED 3092 */ 3093 private void setEnableFailFastMobileData(int enabled) { 3094 int tag; 3095 3096 if (enabled == DctConstants.ENABLED) { 3097 tag = mEnableFailFastMobileDataTag.incrementAndGet(); 3098 } else { 3099 tag = mEnableFailFastMobileDataTag.get(); 3100 } 3101 mHandler.sendMessage(mHandler.obtainMessage(EVENT_ENABLE_FAIL_FAST_MOBILE_DATA, tag, 3102 enabled)); 3103 } 3104 3105 @Override 3106 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3107 // TODO: Remove? Any reason to trigger a provisioning check? 3108 return -1; 3109 } 3110 3111 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3112 private volatile boolean mIsNotificationVisible = false; 3113 3114 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3115 if (DBG) { 3116 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3117 + " action=" + action); 3118 } 3119 Intent intent = new Intent(action); 3120 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3121 // Concatenate the range of types onto the range of NetIDs. 3122 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3123 setProvNotificationVisibleIntent(visible, id, networkType, null, pendingIntent); 3124 } 3125 3126 /** 3127 * Show or hide network provisioning notificaitons. 3128 * 3129 * @param id an identifier that uniquely identifies this notification. This must match 3130 * between show and hide calls. We use the NetID value but for legacy callers 3131 * we concatenate the range of types with the range of NetIDs. 3132 */ 3133 private void setProvNotificationVisibleIntent(boolean visible, int id, int networkType, 3134 String extraInfo, PendingIntent intent) { 3135 if (DBG) { 3136 log("setProvNotificationVisibleIntent: E visible=" + visible + " networkType=" + 3137 networkType + " extraInfo=" + extraInfo); 3138 } 3139 3140 Resources r = Resources.getSystem(); 3141 NotificationManager notificationManager = (NotificationManager) mContext 3142 .getSystemService(Context.NOTIFICATION_SERVICE); 3143 3144 if (visible) { 3145 CharSequence title; 3146 CharSequence details; 3147 int icon; 3148 Notification notification = new Notification(); 3149 switch (networkType) { 3150 case ConnectivityManager.TYPE_WIFI: 3151 title = r.getString(R.string.wifi_available_sign_in, 0); 3152 details = r.getString(R.string.network_available_sign_in_detailed, 3153 extraInfo); 3154 icon = R.drawable.stat_notify_wifi_in_range; 3155 break; 3156 case ConnectivityManager.TYPE_MOBILE: 3157 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3158 title = r.getString(R.string.network_available_sign_in, 0); 3159 // TODO: Change this to pull from NetworkInfo once a printable 3160 // name has been added to it 3161 details = mTelephonyManager.getNetworkOperatorName(); 3162 icon = R.drawable.stat_notify_rssi_in_range; 3163 break; 3164 default: 3165 title = r.getString(R.string.network_available_sign_in, 0); 3166 details = r.getString(R.string.network_available_sign_in_detailed, 3167 extraInfo); 3168 icon = R.drawable.stat_notify_rssi_in_range; 3169 break; 3170 } 3171 3172 notification.when = 0; 3173 notification.icon = icon; 3174 notification.flags = Notification.FLAG_AUTO_CANCEL; 3175 notification.tickerText = title; 3176 notification.color = mContext.getResources().getColor( 3177 com.android.internal.R.color.system_notification_accent_color); 3178 notification.setLatestEventInfo(mContext, title, details, notification.contentIntent); 3179 notification.contentIntent = intent; 3180 3181 try { 3182 notificationManager.notify(NOTIFICATION_ID, id, notification); 3183 } catch (NullPointerException npe) { 3184 loge("setNotificaitionVisible: visible notificationManager npe=" + npe); 3185 npe.printStackTrace(); 3186 } 3187 } else { 3188 try { 3189 notificationManager.cancel(NOTIFICATION_ID, id); 3190 } catch (NullPointerException npe) { 3191 loge("setNotificaitionVisible: cancel notificationManager npe=" + npe); 3192 npe.printStackTrace(); 3193 } 3194 } 3195 mIsNotificationVisible = visible; 3196 } 3197 3198 /** Location to an updatable file listing carrier provisioning urls. 3199 * An example: 3200 * 3201 * <?xml version="1.0" encoding="utf-8"?> 3202 * <provisioningUrls> 3203 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3204 * <redirectedUrl mcc="310" mnc="4">http://www.google.com</redirectedUrl> 3205 * </provisioningUrls> 3206 */ 3207 private static final String PROVISIONING_URL_PATH = 3208 "/data/misc/radio/provisioning_urls.xml"; 3209 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3210 3211 /** XML tag for root element. */ 3212 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3213 /** XML tag for individual url */ 3214 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3215 /** XML tag for redirected url */ 3216 private static final String TAG_REDIRECTED_URL = "redirectedUrl"; 3217 /** XML attribute for mcc */ 3218 private static final String ATTR_MCC = "mcc"; 3219 /** XML attribute for mnc */ 3220 private static final String ATTR_MNC = "mnc"; 3221 3222 private static final int REDIRECTED_PROVISIONING = 1; 3223 private static final int PROVISIONING = 2; 3224 3225 private String getProvisioningUrlBaseFromFile(int type) { 3226 FileReader fileReader = null; 3227 XmlPullParser parser = null; 3228 Configuration config = mContext.getResources().getConfiguration(); 3229 String tagType; 3230 3231 switch (type) { 3232 case PROVISIONING: 3233 tagType = TAG_PROVISIONING_URL; 3234 break; 3235 case REDIRECTED_PROVISIONING: 3236 tagType = TAG_REDIRECTED_URL; 3237 break; 3238 default: 3239 throw new RuntimeException("getProvisioningUrlBaseFromFile: Unexpected parameter " + 3240 type); 3241 } 3242 3243 try { 3244 fileReader = new FileReader(mProvisioningUrlFile); 3245 parser = Xml.newPullParser(); 3246 parser.setInput(fileReader); 3247 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3248 3249 while (true) { 3250 XmlUtils.nextElement(parser); 3251 3252 String element = parser.getName(); 3253 if (element == null) break; 3254 3255 if (element.equals(tagType)) { 3256 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3257 try { 3258 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3259 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3260 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3261 parser.next(); 3262 if (parser.getEventType() == XmlPullParser.TEXT) { 3263 return parser.getText(); 3264 } 3265 } 3266 } 3267 } catch (NumberFormatException e) { 3268 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3269 } 3270 } 3271 } 3272 return null; 3273 } catch (FileNotFoundException e) { 3274 loge("Carrier Provisioning Urls file not found"); 3275 } catch (XmlPullParserException e) { 3276 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3277 } catch (IOException e) { 3278 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3279 } finally { 3280 if (fileReader != null) { 3281 try { 3282 fileReader.close(); 3283 } catch (IOException e) {} 3284 } 3285 } 3286 return null; 3287 } 3288 3289 @Override 3290 public String getMobileRedirectedProvisioningUrl() { 3291 enforceConnectivityInternalPermission(); 3292 String url = getProvisioningUrlBaseFromFile(REDIRECTED_PROVISIONING); 3293 if (TextUtils.isEmpty(url)) { 3294 url = mContext.getResources().getString(R.string.mobile_redirected_provisioning_url); 3295 } 3296 return url; 3297 } 3298 3299 @Override 3300 public String getMobileProvisioningUrl() { 3301 enforceConnectivityInternalPermission(); 3302 String url = getProvisioningUrlBaseFromFile(PROVISIONING); 3303 if (TextUtils.isEmpty(url)) { 3304 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3305 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3306 } else { 3307 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3308 } 3309 // populate the iccid, imei and phone number in the provisioning url. 3310 if (!TextUtils.isEmpty(url)) { 3311 String phoneNumber = mTelephonyManager.getLine1Number(); 3312 if (TextUtils.isEmpty(phoneNumber)) { 3313 phoneNumber = "0000000000"; 3314 } 3315 url = String.format(url, 3316 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3317 mTelephonyManager.getDeviceId() /* IMEI */, 3318 phoneNumber /* Phone numer */); 3319 } 3320 3321 return url; 3322 } 3323 3324 @Override 3325 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3326 String action) { 3327 enforceConnectivityInternalPermission(); 3328 final long ident = Binder.clearCallingIdentity(); 3329 try { 3330 setProvNotificationVisible(visible, networkType, action); 3331 } finally { 3332 Binder.restoreCallingIdentity(ident); 3333 } 3334 } 3335 3336 @Override 3337 public void setAirplaneMode(boolean enable) { 3338 enforceConnectivityInternalPermission(); 3339 final long ident = Binder.clearCallingIdentity(); 3340 try { 3341 final ContentResolver cr = mContext.getContentResolver(); 3342 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3343 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3344 intent.putExtra("state", enable); 3345 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3346 } finally { 3347 Binder.restoreCallingIdentity(ident); 3348 } 3349 } 3350 3351 private void onUserStart(int userId) { 3352 synchronized(mVpns) { 3353 Vpn userVpn = mVpns.get(userId); 3354 if (userVpn != null) { 3355 loge("Starting user already has a VPN"); 3356 return; 3357 } 3358 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, this, userId); 3359 mVpns.put(userId, userVpn); 3360 } 3361 } 3362 3363 private void onUserStop(int userId) { 3364 synchronized(mVpns) { 3365 Vpn userVpn = mVpns.get(userId); 3366 if (userVpn == null) { 3367 loge("Stopping user has no VPN"); 3368 return; 3369 } 3370 mVpns.delete(userId); 3371 } 3372 } 3373 3374 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3375 @Override 3376 public void onReceive(Context context, Intent intent) { 3377 final String action = intent.getAction(); 3378 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3379 if (userId == UserHandle.USER_NULL) return; 3380 3381 if (Intent.ACTION_USER_STARTING.equals(action)) { 3382 onUserStart(userId); 3383 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3384 onUserStop(userId); 3385 } 3386 } 3387 }; 3388 3389 /* Infrastructure for network sampling */ 3390 3391 private void handleNetworkSamplingTimeout() { 3392 3393 if (SAMPLE_DBG) log("Sampling interval elapsed, updating statistics .."); 3394 3395 // initialize list of interfaces .. 3396 Map<String, SamplingDataTracker.SamplingSnapshot> mapIfaceToSample = 3397 new HashMap<String, SamplingDataTracker.SamplingSnapshot>(); 3398 for (NetworkStateTracker tracker : mNetTrackers) { 3399 if (tracker != null) { 3400 String ifaceName = tracker.getNetworkInterfaceName(); 3401 if (ifaceName != null) { 3402 mapIfaceToSample.put(ifaceName, null); 3403 } 3404 } 3405 } 3406 3407 // Read samples for all interfaces 3408 SamplingDataTracker.getSamplingSnapshots(mapIfaceToSample); 3409 3410 // process samples for all networks 3411 for (NetworkStateTracker tracker : mNetTrackers) { 3412 if (tracker != null) { 3413 String ifaceName = tracker.getNetworkInterfaceName(); 3414 SamplingDataTracker.SamplingSnapshot ss = mapIfaceToSample.get(ifaceName); 3415 if (ss != null) { 3416 // end the previous sampling cycle 3417 tracker.stopSampling(ss); 3418 // start a new sampling cycle .. 3419 tracker.startSampling(ss); 3420 } 3421 } 3422 } 3423 3424 if (SAMPLE_DBG) log("Done."); 3425 3426 int samplingIntervalInSeconds = Settings.Global.getInt(mContext.getContentResolver(), 3427 Settings.Global.CONNECTIVITY_SAMPLING_INTERVAL_IN_SECONDS, 3428 DEFAULT_SAMPLING_INTERVAL_IN_SECONDS); 3429 3430 if (SAMPLE_DBG) { 3431 log("Setting timer for " + String.valueOf(samplingIntervalInSeconds) + "seconds"); 3432 } 3433 3434 setAlarm(samplingIntervalInSeconds * 1000, mSampleIntervalElapsedIntent); 3435 } 3436 3437 /** 3438 * Sets a network sampling alarm. 3439 */ 3440 void setAlarm(int timeoutInMilliseconds, PendingIntent intent) { 3441 long wakeupTime = SystemClock.elapsedRealtime() + timeoutInMilliseconds; 3442 int alarmType; 3443 if (Resources.getSystem().getBoolean( 3444 R.bool.config_networkSamplingWakesDevice)) { 3445 alarmType = AlarmManager.ELAPSED_REALTIME_WAKEUP; 3446 } else { 3447 alarmType = AlarmManager.ELAPSED_REALTIME; 3448 } 3449 mAlarmManager.set(alarmType, wakeupTime, intent); 3450 } 3451 3452 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3453 new HashMap<Messenger, NetworkFactoryInfo>(); 3454 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3455 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3456 3457 private static class NetworkFactoryInfo { 3458 public final String name; 3459 public final Messenger messenger; 3460 public final AsyncChannel asyncChannel; 3461 3462 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3463 this.name = name; 3464 this.messenger = messenger; 3465 this.asyncChannel = asyncChannel; 3466 } 3467 } 3468 3469 /** 3470 * Tracks info about the requester. 3471 * Also used to notice when the calling process dies so we can self-expire 3472 */ 3473 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3474 static final boolean REQUEST = true; 3475 static final boolean LISTEN = false; 3476 3477 final NetworkRequest request; 3478 final PendingIntent mPendingIntent; 3479 boolean mPendingIntentSent; 3480 private final IBinder mBinder; 3481 final int mPid; 3482 final int mUid; 3483 final Messenger messenger; 3484 final boolean isRequest; 3485 3486 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, boolean isRequest) { 3487 request = r; 3488 mPendingIntent = pi; 3489 messenger = null; 3490 mBinder = null; 3491 mPid = getCallingPid(); 3492 mUid = getCallingUid(); 3493 this.isRequest = isRequest; 3494 } 3495 3496 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, boolean isRequest) { 3497 super(); 3498 messenger = m; 3499 request = r; 3500 mBinder = binder; 3501 mPid = getCallingPid(); 3502 mUid = getCallingUid(); 3503 this.isRequest = isRequest; 3504 mPendingIntent = null; 3505 3506 try { 3507 mBinder.linkToDeath(this, 0); 3508 } catch (RemoteException e) { 3509 binderDied(); 3510 } 3511 } 3512 3513 void unlinkDeathRecipient() { 3514 if (mBinder != null) { 3515 mBinder.unlinkToDeath(this, 0); 3516 } 3517 } 3518 3519 public void binderDied() { 3520 log("ConnectivityService NetworkRequestInfo binderDied(" + 3521 request + ", " + mBinder + ")"); 3522 releaseNetworkRequest(request); 3523 } 3524 3525 public String toString() { 3526 return (isRequest ? "Request" : "Listen") + " from uid/pid:" + mUid + "/" + 3527 mPid + " for " + request + 3528 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3529 } 3530 } 3531 3532 @Override 3533 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3534 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3535 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3536 enforceNetworkRequestPermissions(networkCapabilities); 3537 enforceMeteredApnPolicy(networkCapabilities); 3538 3539 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3540 throw new IllegalArgumentException("Bad timeout specified"); 3541 } 3542 3543 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3544 nextNetworkRequestId()); 3545 if (DBG) log("requestNetwork for " + networkRequest); 3546 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3547 NetworkRequestInfo.REQUEST); 3548 3549 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3550 if (timeoutMs > 0) { 3551 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3552 nri), timeoutMs); 3553 } 3554 return networkRequest; 3555 } 3556 3557 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3558 if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED) 3559 == false) { 3560 enforceConnectivityInternalPermission(); 3561 } else { 3562 enforceChangePermission(); 3563 } 3564 } 3565 3566 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3567 // if UID is restricted, don't allow them to bring up metered APNs 3568 if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED) 3569 == false) { 3570 final int uidRules; 3571 final int uid = Binder.getCallingUid(); 3572 synchronized(mRulesLock) { 3573 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3574 } 3575 if ((uidRules & RULE_REJECT_METERED) != 0) { 3576 // we could silently fail or we can filter the available nets to only give 3577 // them those they have access to. Chose the more useful 3578 networkCapabilities.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED); 3579 } 3580 } 3581 } 3582 3583 @Override 3584 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3585 PendingIntent operation) { 3586 checkNotNull(operation, "PendingIntent cannot be null."); 3587 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3588 enforceNetworkRequestPermissions(networkCapabilities); 3589 enforceMeteredApnPolicy(networkCapabilities); 3590 3591 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3592 nextNetworkRequestId()); 3593 if (DBG) log("pendingRequest for " + networkRequest + " to trigger " + operation); 3594 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3595 NetworkRequestInfo.REQUEST); 3596 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3597 nri)); 3598 return networkRequest; 3599 } 3600 3601 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3602 mHandler.sendMessageDelayed( 3603 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3604 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3605 } 3606 3607 @Override 3608 public void releasePendingNetworkRequest(PendingIntent operation) { 3609 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3610 getCallingUid(), 0, operation)); 3611 } 3612 3613 @Override 3614 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 3615 Messenger messenger, IBinder binder) { 3616 enforceAccessPermission(); 3617 3618 NetworkRequest networkRequest = new NetworkRequest(new NetworkCapabilities( 3619 networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3620 if (DBG) log("listenForNetwork for " + networkRequest); 3621 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3622 NetworkRequestInfo.LISTEN); 3623 3624 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3625 return networkRequest; 3626 } 3627 3628 @Override 3629 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 3630 PendingIntent operation) { 3631 } 3632 3633 @Override 3634 public void releaseNetworkRequest(NetworkRequest networkRequest) { 3635 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 3636 0, networkRequest)); 3637 } 3638 3639 @Override 3640 public void registerNetworkFactory(Messenger messenger, String name) { 3641 enforceConnectivityInternalPermission(); 3642 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 3643 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 3644 } 3645 3646 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 3647 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 3648 mNetworkFactoryInfos.put(nfi.messenger, nfi); 3649 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 3650 } 3651 3652 @Override 3653 public void unregisterNetworkFactory(Messenger messenger) { 3654 enforceConnectivityInternalPermission(); 3655 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 3656 } 3657 3658 private void handleUnregisterNetworkFactory(Messenger messenger) { 3659 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 3660 if (nfi == null) { 3661 loge("Failed to find Messenger in unregisterNetworkFactory"); 3662 return; 3663 } 3664 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 3665 } 3666 3667 /** 3668 * NetworkAgentInfo supporting a request by requestId. 3669 * These have already been vetted (their Capabilities satisfy the request) 3670 * and the are the highest scored network available. 3671 * the are keyed off the Requests requestId. 3672 */ 3673 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 3674 new SparseArray<NetworkAgentInfo>(); 3675 3676 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 3677 new SparseArray<NetworkAgentInfo>(); 3678 3679 // NetworkAgentInfo keyed off its connecting messenger 3680 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 3681 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 3682 new HashMap<Messenger, NetworkAgentInfo>(); 3683 3684 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 3685 private final NetworkRequest mDefaultRequest; 3686 3687 private NetworkAgentInfo getDefaultNetwork() { 3688 return mNetworkForRequestId.get(mDefaultRequest.requestId); 3689 } 3690 3691 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 3692 return nai == getDefaultNetwork(); 3693 } 3694 3695 public void registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 3696 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 3697 int currentScore, NetworkMisc networkMisc) { 3698 enforceConnectivityInternalPermission(); 3699 3700 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 3701 // satisfies mDefaultRequest. 3702 NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 3703 new NetworkInfo(networkInfo), new LinkProperties(linkProperties), 3704 new NetworkCapabilities(networkCapabilities), currentScore, mContext, mTrackerHandler, 3705 new NetworkMisc(networkMisc), mDefaultRequest); 3706 synchronized (this) { 3707 nai.networkMonitor.systemReady = mSystemReady; 3708 } 3709 if (DBG) log("registerNetworkAgent " + nai); 3710 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 3711 } 3712 3713 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 3714 if (VDBG) log("Got NetworkAgent Messenger"); 3715 mNetworkAgentInfos.put(na.messenger, na); 3716 assignNextNetId(na); 3717 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 3718 NetworkInfo networkInfo = na.networkInfo; 3719 na.networkInfo = null; 3720 updateNetworkInfo(na, networkInfo); 3721 } 3722 3723 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 3724 LinkProperties newLp = networkAgent.linkProperties; 3725 int netId = networkAgent.network.netId; 3726 3727 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 3728 // we do anything else, make sure its LinkProperties are accurate. 3729 if (networkAgent.clatd != null) { 3730 networkAgent.clatd.fixupLinkProperties(oldLp); 3731 } 3732 3733 updateInterfaces(newLp, oldLp, netId); 3734 updateMtu(newLp, oldLp); 3735 // TODO - figure out what to do for clat 3736// for (LinkProperties lp : newLp.getStackedLinks()) { 3737// updateMtu(lp, null); 3738// } 3739 updateTcpBufferSizes(networkAgent); 3740 3741 // TODO: deprecate and remove mDefaultDns when we can do so safely. 3742 // For now, use it only when the network has Internet access. http://b/18327075 3743 final boolean useDefaultDns = networkAgent.networkCapabilities.hasCapability( 3744 NetworkCapabilities.NET_CAPABILITY_INTERNET); 3745 final boolean flushDns = updateRoutes(newLp, oldLp, netId); 3746 updateDnses(newLp, oldLp, netId, flushDns, useDefaultDns); 3747 3748 updateClat(newLp, oldLp, networkAgent); 3749 if (isDefaultNetwork(networkAgent)) { 3750 handleApplyDefaultProxy(newLp.getHttpProxy()); 3751 } else { 3752 updateProxy(newLp, oldLp, networkAgent); 3753 } 3754 // TODO - move this check to cover the whole function 3755 if (!Objects.equals(newLp, oldLp)) { 3756 notifyIfacesChanged(); 3757 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 3758 } 3759 } 3760 3761 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3762 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 3763 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 3764 3765 if (!wasRunningClat && shouldRunClat) { 3766 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 3767 nai.clatd.start(); 3768 } else if (wasRunningClat && !shouldRunClat) { 3769 nai.clatd.stop(); 3770 } 3771 } 3772 3773 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 3774 CompareResult<String> interfaceDiff = new CompareResult<String>(); 3775 if (oldLp != null) { 3776 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 3777 } else if (newLp != null) { 3778 interfaceDiff.added = newLp.getAllInterfaceNames(); 3779 } 3780 for (String iface : interfaceDiff.added) { 3781 try { 3782 if (DBG) log("Adding iface " + iface + " to network " + netId); 3783 mNetd.addInterfaceToNetwork(iface, netId); 3784 } catch (Exception e) { 3785 loge("Exception adding interface: " + e); 3786 } 3787 } 3788 for (String iface : interfaceDiff.removed) { 3789 try { 3790 if (DBG) log("Removing iface " + iface + " from network " + netId); 3791 mNetd.removeInterfaceFromNetwork(iface, netId); 3792 } catch (Exception e) { 3793 loge("Exception removing interface: " + e); 3794 } 3795 } 3796 } 3797 3798 /** 3799 * Have netd update routes from oldLp to newLp. 3800 * @return true if routes changed between oldLp and newLp 3801 */ 3802 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 3803 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 3804 if (oldLp != null) { 3805 routeDiff = oldLp.compareAllRoutes(newLp); 3806 } else if (newLp != null) { 3807 routeDiff.added = newLp.getAllRoutes(); 3808 } 3809 3810 // add routes before removing old in case it helps with continuous connectivity 3811 3812 // do this twice, adding non-nexthop routes first, then routes they are dependent on 3813 for (RouteInfo route : routeDiff.added) { 3814 if (route.hasGateway()) continue; 3815 if (DBG) log("Adding Route [" + route + "] to network " + netId); 3816 try { 3817 mNetd.addRoute(netId, route); 3818 } catch (Exception e) { 3819 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 3820 loge("Exception in addRoute for non-gateway: " + e); 3821 } 3822 } 3823 } 3824 for (RouteInfo route : routeDiff.added) { 3825 if (route.hasGateway() == false) continue; 3826 if (DBG) log("Adding Route [" + route + "] to network " + netId); 3827 try { 3828 mNetd.addRoute(netId, route); 3829 } catch (Exception e) { 3830 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 3831 loge("Exception in addRoute for gateway: " + e); 3832 } 3833 } 3834 } 3835 3836 for (RouteInfo route : routeDiff.removed) { 3837 if (DBG) log("Removing Route [" + route + "] from network " + netId); 3838 try { 3839 mNetd.removeRoute(netId, route); 3840 } catch (Exception e) { 3841 loge("Exception in removeRoute: " + e); 3842 } 3843 } 3844 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 3845 } 3846 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId, 3847 boolean flush, boolean useDefaultDns) { 3848 if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) { 3849 Collection<InetAddress> dnses = newLp.getDnsServers(); 3850 if (dnses.size() == 0 && mDefaultDns != null && useDefaultDns) { 3851 dnses = new ArrayList(); 3852 dnses.add(mDefaultDns); 3853 if (DBG) { 3854 loge("no dns provided for netId " + netId + ", so using defaults"); 3855 } 3856 } 3857 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 3858 try { 3859 mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses), 3860 newLp.getDomains()); 3861 } catch (Exception e) { 3862 loge("Exception in setDnsServersForNetwork: " + e); 3863 } 3864 NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId); 3865 if (defaultNai != null && defaultNai.network.netId == netId) { 3866 setDefaultDnsSystemProperties(dnses); 3867 } 3868 flushVmDnsCache(); 3869 } else if (flush) { 3870 try { 3871 mNetd.flushNetworkDnsCache(netId); 3872 } catch (Exception e) { 3873 loge("Exception in flushNetworkDnsCache: " + e); 3874 } 3875 flushVmDnsCache(); 3876 } 3877 } 3878 3879 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 3880 int last = 0; 3881 for (InetAddress dns : dnses) { 3882 ++last; 3883 String key = "net.dns" + last; 3884 String value = dns.getHostAddress(); 3885 SystemProperties.set(key, value); 3886 } 3887 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 3888 String key = "net.dns" + i; 3889 SystemProperties.set(key, ""); 3890 } 3891 mNumDnsEntries = last; 3892 } 3893 3894 private void updateCapabilities(NetworkAgentInfo networkAgent, 3895 NetworkCapabilities networkCapabilities) { 3896 if (!Objects.equals(networkAgent.networkCapabilities, networkCapabilities)) { 3897 synchronized (networkAgent) { 3898 networkAgent.networkCapabilities = networkCapabilities; 3899 } 3900 rematchAllNetworksAndRequests(networkAgent, networkAgent.getCurrentScore()); 3901 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_CAP_CHANGED); 3902 } 3903 } 3904 3905 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 3906 for (int i = 0; i < nai.networkRequests.size(); i++) { 3907 NetworkRequest nr = nai.networkRequests.valueAt(i); 3908 // Don't send listening requests to factories. b/17393458 3909 if (!isRequest(nr)) continue; 3910 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 3911 } 3912 } 3913 3914 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 3915 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 3916 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 3917 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 3918 networkRequest); 3919 } 3920 } 3921 3922 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 3923 int notificationType) { 3924 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 3925 Intent intent = new Intent(); 3926 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 3927 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 3928 nri.mPendingIntentSent = true; 3929 sendIntent(nri.mPendingIntent, intent); 3930 } 3931 // else not handled 3932 } 3933 3934 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 3935 mPendingIntentWakeLock.acquire(); 3936 try { 3937 if (DBG) log("Sending " + pendingIntent); 3938 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 3939 } catch (PendingIntent.CanceledException e) { 3940 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 3941 mPendingIntentWakeLock.release(); 3942 releasePendingNetworkRequest(pendingIntent); 3943 } 3944 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 3945 } 3946 3947 @Override 3948 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 3949 String resultData, Bundle resultExtras) { 3950 if (DBG) log("Finished sending " + pendingIntent); 3951 mPendingIntentWakeLock.release(); 3952 // Release with a delay so the receiving client has an opportunity to put in its 3953 // own request. 3954 releasePendingNetworkRequestWithDelay(pendingIntent); 3955 } 3956 3957 private void callCallbackForRequest(NetworkRequestInfo nri, 3958 NetworkAgentInfo networkAgent, int notificationType) { 3959 if (nri.messenger == null) return; // Default request has no msgr 3960 Bundle bundle = new Bundle(); 3961 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 3962 new NetworkRequest(nri.request)); 3963 Message msg = Message.obtain(); 3964 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 3965 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 3966 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 3967 } 3968 switch (notificationType) { 3969 case ConnectivityManager.CALLBACK_LOSING: { 3970 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 3971 break; 3972 } 3973 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 3974 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 3975 new NetworkCapabilities(networkAgent.networkCapabilities)); 3976 break; 3977 } 3978 case ConnectivityManager.CALLBACK_IP_CHANGED: { 3979 bundle.putParcelable(LinkProperties.class.getSimpleName(), 3980 new LinkProperties(networkAgent.linkProperties)); 3981 break; 3982 } 3983 } 3984 msg.what = notificationType; 3985 msg.setData(bundle); 3986 try { 3987 if (VDBG) { 3988 log("sending notification " + notifyTypeToName(notificationType) + 3989 " for " + nri.request); 3990 } 3991 nri.messenger.send(msg); 3992 } catch (RemoteException e) { 3993 // may occur naturally in the race of binder death. 3994 loge("RemoteException caught trying to send a callback msg for " + nri.request); 3995 } 3996 } 3997 3998 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 3999 for (int i = 0; i < nai.networkRequests.size(); i++) { 4000 NetworkRequest nr = nai.networkRequests.valueAt(i); 4001 // Ignore listening requests. 4002 if (!isRequest(nr)) continue; 4003 loge("Dead network still had at least " + nr); 4004 break; 4005 } 4006 nai.asyncChannel.disconnect(); 4007 } 4008 4009 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4010 if (oldNetwork == null) { 4011 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4012 return; 4013 } 4014 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4015 teardownUnneededNetwork(oldNetwork); 4016 } 4017 4018 private void makeDefault(NetworkAgentInfo newNetwork) { 4019 if (DBG) log("Switching to new default network: " + newNetwork); 4020 setupDataActivityTracking(newNetwork); 4021 try { 4022 mNetd.setDefaultNetId(newNetwork.network.netId); 4023 } catch (Exception e) { 4024 loge("Exception setting default network :" + e); 4025 } 4026 notifyLockdownVpn(newNetwork); 4027 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4028 updateTcpBufferSizes(newNetwork); 4029 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4030 } 4031 4032 // Handles a network appearing or improving its score. 4033 // 4034 // - Evaluates all current NetworkRequests that can be 4035 // satisfied by newNetwork, and reassigns to newNetwork 4036 // any such requests for which newNetwork is the best. 4037 // 4038 // - Lingers any validated Networks that as a result are no longer 4039 // needed. A network is needed if it is the best network for 4040 // one or more NetworkRequests, or if it is a VPN. 4041 // 4042 // - Tears down newNetwork if it just became validated 4043 // (i.e. nascent==JUST_VALIDATED) but turns out to be unneeded. 4044 // 4045 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4046 // networks that have no chance (i.e. even if validated) 4047 // of becoming the highest scoring network. 4048 // 4049 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4050 // it does not remove NetworkRequests that other Networks could better satisfy. 4051 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4052 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4053 // as it performs better by a factor of the number of Networks. 4054 // 4055 // @param newNetwork is the network to be matched against NetworkRequests. 4056 // @param nascent indicates if newNetwork just became validated, in which case it should be 4057 // torn down if unneeded. 4058 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4059 // performed to tear down unvalidated networks that have no chance (i.e. even if 4060 // validated) of becoming the highest scoring network. 4061 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, NascentState nascent, 4062 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4063 if (!newNetwork.created) return; 4064 if (nascent == NascentState.JUST_VALIDATED && !newNetwork.everValidated) { 4065 loge("ERROR: nascent network not validated."); 4066 } 4067 boolean keep = newNetwork.isVPN(); 4068 boolean isNewDefault = false; 4069 NetworkAgentInfo oldDefaultNetwork = null; 4070 if (DBG) log("rematching " + newNetwork.name()); 4071 // Find and migrate to this Network any NetworkRequests for 4072 // which this network is now the best. 4073 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4074 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4075 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4076 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4077 if (newNetwork == currentNetwork) { 4078 if (DBG) { 4079 log("Network " + newNetwork.name() + " was already satisfying" + 4080 " request " + nri.request.requestId + ". No change."); 4081 } 4082 keep = true; 4083 continue; 4084 } 4085 4086 // check if it satisfies the NetworkCapabilities 4087 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4088 if (newNetwork.satisfies(nri.request)) { 4089 if (!nri.isRequest) { 4090 // This is not a request, it's a callback listener. 4091 // Add it to newNetwork regardless of score. 4092 newNetwork.addRequest(nri.request); 4093 continue; 4094 } 4095 4096 // next check if it's better than any current network we're using for 4097 // this request 4098 if (VDBG) { 4099 log("currentScore = " + 4100 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4101 ", newScore = " + newNetwork.getCurrentScore()); 4102 } 4103 if (currentNetwork == null || 4104 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4105 if (currentNetwork != null) { 4106 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4107 currentNetwork.networkRequests.remove(nri.request.requestId); 4108 currentNetwork.networkLingered.add(nri.request); 4109 affectedNetworks.add(currentNetwork); 4110 } else { 4111 if (DBG) log(" accepting network in place of null"); 4112 } 4113 unlinger(newNetwork); 4114 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4115 newNetwork.addRequest(nri.request); 4116 keep = true; 4117 // Tell NetworkFactories about the new score, so they can stop 4118 // trying to connect if they know they cannot match it. 4119 // TODO - this could get expensive if we have alot of requests for this 4120 // network. Think about if there is a way to reduce this. Push 4121 // netid->request mapping to each factory? 4122 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4123 if (mDefaultRequest.requestId == nri.request.requestId) { 4124 isNewDefault = true; 4125 oldDefaultNetwork = currentNetwork; 4126 } 4127 } 4128 } 4129 } 4130 // Linger any networks that are no longer needed. 4131 for (NetworkAgentInfo nai : affectedNetworks) { 4132 if (nai.everValidated && unneeded(nai)) { 4133 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 4134 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 4135 } else { 4136 unlinger(nai); 4137 } 4138 } 4139 if (keep) { 4140 if (isNewDefault) { 4141 // Notify system services that this network is up. 4142 makeDefault(newNetwork); 4143 synchronized (ConnectivityService.this) { 4144 // have a new default network, release the transition wakelock in 4145 // a second if it's held. The second pause is to allow apps 4146 // to reconnect over the new network 4147 if (mNetTransitionWakeLock.isHeld()) { 4148 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4149 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4150 mNetTransitionWakeLockSerialNumber, 0), 4151 1000); 4152 } 4153 } 4154 } 4155 4156 // do this after the default net is switched, but 4157 // before LegacyTypeTracker sends legacy broadcasts 4158 notifyNetworkCallbacks(newNetwork, ConnectivityManager.CALLBACK_AVAILABLE); 4159 4160 if (isNewDefault) { 4161 // Maintain the illusion: since the legacy API only 4162 // understands one network at a time, we must pretend 4163 // that the current default network disconnected before 4164 // the new one connected. 4165 if (oldDefaultNetwork != null) { 4166 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4167 oldDefaultNetwork); 4168 } 4169 mDefaultInetConditionPublished = newNetwork.everValidated ? 100 : 0; 4170 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4171 notifyLockdownVpn(newNetwork); 4172 } 4173 4174 // Notify battery stats service about this network, both the normal 4175 // interface and any stacked links. 4176 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4177 try { 4178 final IBatteryStats bs = BatteryStatsService.getService(); 4179 final int type = newNetwork.networkInfo.getType(); 4180 4181 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4182 bs.noteNetworkInterfaceType(baseIface, type); 4183 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4184 final String stackedIface = stacked.getInterfaceName(); 4185 bs.noteNetworkInterfaceType(stackedIface, type); 4186 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4187 } 4188 } catch (RemoteException ignored) { 4189 } 4190 4191 // This has to happen after the notifyNetworkCallbacks as that tickles each 4192 // ConnectivityManager instance so that legacy requests correctly bind dns 4193 // requests to this network. The legacy users are listening for this bcast 4194 // and will generally do a dns request so they can ensureRouteToHost and if 4195 // they do that before the callbacks happen they'll use the default network. 4196 // 4197 // TODO: Is there still a race here? We send the broadcast 4198 // after sending the callback, but if the app can receive the 4199 // broadcast before the callback, it might still break. 4200 // 4201 // This *does* introduce a race where if the user uses the new api 4202 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4203 // they may get old info. Reverse this after the old startUsing api is removed. 4204 // This is on top of the multiple intent sequencing referenced in the todo above. 4205 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4206 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4207 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4208 // legacy type tracker filters out repeat adds 4209 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4210 } 4211 } 4212 4213 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4214 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4215 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4216 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4217 if (newNetwork.isVPN()) { 4218 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4219 } 4220 } else if (nascent == NascentState.JUST_VALIDATED) { 4221 // Only tear down newly validated networks here. Leave unvalidated to either become 4222 // validated (and get evaluated against peers, one losing here), or get reaped (see 4223 // reapUnvalidatedNetworks) if they have no chance of becoming the highest scoring 4224 // network. Networks that have been up for a while and are validated should be torn 4225 // down via the lingering process so communication on that network is given time to 4226 // wrap up. 4227 if (DBG) log("Validated network turns out to be unwanted. Tear it down."); 4228 teardownUnneededNetwork(newNetwork); 4229 } 4230 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4231 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4232 if (!nai.everValidated && unneeded(nai)) { 4233 if (DBG) log("Reaping " + nai.name()); 4234 teardownUnneededNetwork(nai); 4235 } 4236 } 4237 } 4238 } 4239 4240 // Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4241 // being disconnected. 4242 // If only one Network's score or capabilities have been modified since the last time 4243 // this function was called, pass this Network in via the "changed" arugment, otherwise 4244 // pass null. 4245 // If only one Network has been changed but its NetworkCapabilities have not changed, 4246 // pass in the Network's score (from getCurrentScore()) prior to the change via 4247 // "oldScore", otherwise pass changed.getCurrentScore() or 0 if "changed" is null. 4248 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4249 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4250 // to avoid the slowness. It is not simply enough to process just "changed", for 4251 // example in the case where "changed"'s score decreases and another network should begin 4252 // satifying a NetworkRequest that "changed" currently satisfies. 4253 4254 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4255 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4256 // rematchNetworkAndRequests() handles. 4257 if (changed != null && oldScore < changed.getCurrentScore()) { 4258 rematchNetworkAndRequests(changed, NascentState.NOT_JUST_VALIDATED, 4259 ReapUnvalidatedNetworks.REAP); 4260 } else { 4261 for (Iterator i = mNetworkAgentInfos.values().iterator(); i.hasNext(); ) { 4262 rematchNetworkAndRequests((NetworkAgentInfo)i.next(), 4263 NascentState.NOT_JUST_VALIDATED, 4264 // Only reap the last time through the loop. Reaping before all rematching 4265 // is complete could incorrectly teardown a network that hasn't yet been 4266 // rematched. 4267 i.hasNext() ? ReapUnvalidatedNetworks.DONT_REAP 4268 : ReapUnvalidatedNetworks.REAP); 4269 } 4270 } 4271 } 4272 4273 private void updateInetCondition(NetworkAgentInfo nai) { 4274 // Don't bother updating until we've graduated to validated at least once. 4275 if (!nai.everValidated) return; 4276 // For now only update icons for default connection. 4277 // TODO: Update WiFi and cellular icons separately. b/17237507 4278 if (!isDefaultNetwork(nai)) return; 4279 4280 int newInetCondition = nai.lastValidated ? 100 : 0; 4281 // Don't repeat publish. 4282 if (newInetCondition == mDefaultInetConditionPublished) return; 4283 4284 mDefaultInetConditionPublished = newInetCondition; 4285 sendInetConditionBroadcast(nai.networkInfo); 4286 } 4287 4288 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4289 if (mLockdownTracker != null) { 4290 if (nai != null && nai.isVPN()) { 4291 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4292 } else { 4293 mLockdownTracker.onNetworkInfoChanged(); 4294 } 4295 } 4296 } 4297 4298 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4299 NetworkInfo.State state = newInfo.getState(); 4300 NetworkInfo oldInfo = null; 4301 synchronized (networkAgent) { 4302 oldInfo = networkAgent.networkInfo; 4303 networkAgent.networkInfo = newInfo; 4304 } 4305 notifyLockdownVpn(networkAgent); 4306 4307 if (oldInfo != null && oldInfo.getState() == state) { 4308 if (VDBG) log("ignoring duplicate network state non-change"); 4309 return; 4310 } 4311 if (DBG) { 4312 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4313 (oldInfo == null ? "null" : oldInfo.getState()) + 4314 " to " + state); 4315 } 4316 4317 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4318 try { 4319 // This should never fail. Specifying an already in use NetID will cause failure. 4320 if (networkAgent.isVPN()) { 4321 mNetd.createVirtualNetwork(networkAgent.network.netId, 4322 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4323 (networkAgent.networkMisc == null || 4324 !networkAgent.networkMisc.allowBypass)); 4325 } else { 4326 mNetd.createPhysicalNetwork(networkAgent.network.netId); 4327 } 4328 } catch (Exception e) { 4329 loge("Error creating network " + networkAgent.network.netId + ": " 4330 + e.getMessage()); 4331 return; 4332 } 4333 networkAgent.created = true; 4334 updateLinkProperties(networkAgent, null); 4335 notifyIfacesChanged(); 4336 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4337 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4338 if (networkAgent.isVPN()) { 4339 // Temporarily disable the default proxy (not global). 4340 synchronized (mProxyLock) { 4341 if (!mDefaultProxyDisabled) { 4342 mDefaultProxyDisabled = true; 4343 if (mGlobalProxy == null && mDefaultProxy != null) { 4344 sendProxyBroadcast(null); 4345 } 4346 } 4347 } 4348 // TODO: support proxy per network. 4349 } 4350 // Consider network even though it is not yet validated. 4351 rematchNetworkAndRequests(networkAgent, NascentState.NOT_JUST_VALIDATED, 4352 ReapUnvalidatedNetworks.REAP); 4353 } else if (state == NetworkInfo.State.DISCONNECTED || 4354 state == NetworkInfo.State.SUSPENDED) { 4355 networkAgent.asyncChannel.disconnect(); 4356 if (networkAgent.isVPN()) { 4357 synchronized (mProxyLock) { 4358 if (mDefaultProxyDisabled) { 4359 mDefaultProxyDisabled = false; 4360 if (mGlobalProxy == null && mDefaultProxy != null) { 4361 sendProxyBroadcast(mDefaultProxy); 4362 } 4363 } 4364 } 4365 } 4366 } 4367 } 4368 4369 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4370 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4371 if (score < 0) { 4372 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4373 "). Bumping score to min of 0"); 4374 score = 0; 4375 } 4376 4377 final int oldScore = nai.getCurrentScore(); 4378 nai.setCurrentScore(score); 4379 4380 rematchAllNetworksAndRequests(nai, oldScore); 4381 4382 sendUpdatedScoreToFactories(nai); 4383 } 4384 4385 // notify only this one new request of the current state 4386 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4387 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4388 // TODO - read state from monitor to decide what to send. 4389// if (nai.networkMonitor.isLingering()) { 4390// notifyType = NetworkCallbacks.LOSING; 4391// } else if (nai.networkMonitor.isEvaluating()) { 4392// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4393// } 4394 if (nri.mPendingIntent == null) { 4395 callCallbackForRequest(nri, nai, notifyType); 4396 } else { 4397 sendPendingIntentForRequest(nri, nai, notifyType); 4398 } 4399 } 4400 4401 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, boolean connected, int type) { 4402 // The NetworkInfo we actually send out has no bearing on the real 4403 // state of affairs. For example, if the default connection is mobile, 4404 // and a request for HIPRI has just gone away, we need to pretend that 4405 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4406 // the state to DISCONNECTED, even though the network is of type MOBILE 4407 // and is still connected. 4408 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4409 info.setType(type); 4410 if (connected) { 4411 info.setDetailedState(DetailedState.CONNECTED, null, info.getExtraInfo()); 4412 sendConnectedBroadcast(info); 4413 } else { 4414 info.setDetailedState(DetailedState.DISCONNECTED, null, info.getExtraInfo()); 4415 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4416 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4417 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4418 if (info.isFailover()) { 4419 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4420 nai.networkInfo.setFailover(false); 4421 } 4422 if (info.getReason() != null) { 4423 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4424 } 4425 if (info.getExtraInfo() != null) { 4426 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4427 } 4428 NetworkAgentInfo newDefaultAgent = null; 4429 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4430 newDefaultAgent = mNetworkForRequestId.get(mDefaultRequest.requestId); 4431 if (newDefaultAgent != null) { 4432 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4433 newDefaultAgent.networkInfo); 4434 } else { 4435 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4436 } 4437 } 4438 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4439 mDefaultInetConditionPublished); 4440 final Intent immediateIntent = new Intent(intent); 4441 immediateIntent.setAction(CONNECTIVITY_ACTION_IMMEDIATE); 4442 sendStickyBroadcast(immediateIntent); 4443 sendStickyBroadcast(intent); 4444 if (newDefaultAgent != null) { 4445 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4446 } 4447 } 4448 } 4449 4450 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4451 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4452 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4453 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4454 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4455 if (VDBG) log(" sending notification for " + nr); 4456 if (nri.mPendingIntent == null) { 4457 callCallbackForRequest(nri, networkAgent, notifyType); 4458 } else { 4459 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4460 } 4461 } 4462 } 4463 4464 private String notifyTypeToName(int notifyType) { 4465 switch (notifyType) { 4466 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4467 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4468 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4469 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4470 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4471 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4472 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4473 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4474 } 4475 return "UNKNOWN"; 4476 } 4477 4478 /** 4479 * Notify other system services that set of active ifaces has changed. 4480 */ 4481 private void notifyIfacesChanged() { 4482 try { 4483 mStatsService.forceUpdateIfaces(); 4484 } catch (Exception ignored) { 4485 } 4486 } 4487 4488 @Override 4489 public boolean addVpnAddress(String address, int prefixLength) { 4490 throwIfLockdownEnabled(); 4491 int user = UserHandle.getUserId(Binder.getCallingUid()); 4492 synchronized (mVpns) { 4493 return mVpns.get(user).addAddress(address, prefixLength); 4494 } 4495 } 4496 4497 @Override 4498 public boolean removeVpnAddress(String address, int prefixLength) { 4499 throwIfLockdownEnabled(); 4500 int user = UserHandle.getUserId(Binder.getCallingUid()); 4501 synchronized (mVpns) { 4502 return mVpns.get(user).removeAddress(address, prefixLength); 4503 } 4504 } 4505 4506 @Override 4507 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 4508 throwIfLockdownEnabled(); 4509 int user = UserHandle.getUserId(Binder.getCallingUid()); 4510 synchronized (mVpns) { 4511 return mVpns.get(user).setUnderlyingNetworks(networks); 4512 } 4513 } 4514} 4515