ConnectivityService.java revision 8deb34106760abfea6f5cc65e727b9a54f480d16
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 30import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 31import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 32import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 33 34import android.annotation.Nullable; 35import android.app.AlarmManager; 36import android.app.Notification; 37import android.app.NotificationManager; 38import android.app.PendingIntent; 39import android.content.BroadcastReceiver; 40import android.content.ContentResolver; 41import android.content.Context; 42import android.content.Intent; 43import android.content.IntentFilter; 44import android.content.pm.PackageManager; 45import android.content.res.Configuration; 46import android.content.res.Resources; 47import android.database.ContentObserver; 48import android.net.ConnectivityManager; 49import android.net.IConnectivityManager; 50import android.net.INetworkManagementEventObserver; 51import android.net.INetworkPolicyListener; 52import android.net.INetworkPolicyManager; 53import android.net.INetworkStatsService; 54import android.net.LinkProperties; 55import android.net.LinkProperties.CompareResult; 56import android.net.Network; 57import android.net.NetworkAgent; 58import android.net.NetworkCapabilities; 59import android.net.NetworkConfig; 60import android.net.NetworkInfo; 61import android.net.NetworkInfo.DetailedState; 62import android.net.NetworkMisc; 63import android.net.NetworkQuotaInfo; 64import android.net.NetworkRequest; 65import android.net.NetworkState; 66import android.net.NetworkUtils; 67import android.net.Proxy; 68import android.net.ProxyInfo; 69import android.net.RouteInfo; 70import android.net.UidRange; 71import android.net.Uri; 72import android.os.Binder; 73import android.os.Bundle; 74import android.os.FileUtils; 75import android.os.Handler; 76import android.os.HandlerThread; 77import android.os.IBinder; 78import android.os.INetworkManagementService; 79import android.os.Looper; 80import android.os.Message; 81import android.os.Messenger; 82import android.os.ParcelFileDescriptor; 83import android.os.PowerManager; 84import android.os.Process; 85import android.os.RemoteException; 86import android.os.SystemClock; 87import android.os.SystemProperties; 88import android.os.UserHandle; 89import android.os.UserManager; 90import android.provider.Settings; 91import android.security.Credentials; 92import android.security.KeyStore; 93import android.telephony.TelephonyManager; 94import android.text.TextUtils; 95import android.util.Slog; 96import android.util.SparseArray; 97import android.util.SparseBooleanArray; 98import android.util.SparseIntArray; 99import android.util.Xml; 100 101import com.android.internal.R; 102import com.android.internal.annotations.GuardedBy; 103import com.android.internal.app.IBatteryStats; 104import com.android.internal.net.LegacyVpnInfo; 105import com.android.internal.net.NetworkStatsFactory; 106import com.android.internal.net.VpnConfig; 107import com.android.internal.net.VpnInfo; 108import com.android.internal.net.VpnProfile; 109import com.android.internal.telephony.DctConstants; 110import com.android.internal.util.AsyncChannel; 111import com.android.internal.util.IndentingPrintWriter; 112import com.android.internal.util.XmlUtils; 113import com.android.server.am.BatteryStatsService; 114import com.android.server.connectivity.DataConnectionStats; 115import com.android.server.connectivity.Nat464Xlat; 116import com.android.server.connectivity.NetworkAgentInfo; 117import com.android.server.connectivity.NetworkMonitor; 118import com.android.server.connectivity.PacManager; 119import com.android.server.connectivity.PermissionMonitor; 120import com.android.server.connectivity.Tethering; 121import com.android.server.connectivity.Vpn; 122import com.android.server.net.BaseNetworkObserver; 123import com.android.server.net.LockdownVpnTracker; 124import com.google.android.collect.Lists; 125import com.google.android.collect.Sets; 126 127import org.xmlpull.v1.XmlPullParser; 128import org.xmlpull.v1.XmlPullParserException; 129 130import java.io.File; 131import java.io.FileDescriptor; 132import java.io.FileNotFoundException; 133import java.io.FileReader; 134import java.io.IOException; 135import java.io.PrintWriter; 136import java.net.Inet4Address; 137import java.net.InetAddress; 138import java.net.UnknownHostException; 139import java.util.ArrayList; 140import java.util.Arrays; 141import java.util.Collection; 142import java.util.HashMap; 143import java.util.HashSet; 144import java.util.Iterator; 145import java.util.List; 146import java.util.Map; 147import java.util.Objects; 148import java.util.concurrent.atomic.AtomicInteger; 149 150/** 151 * @hide 152 */ 153public class ConnectivityService extends IConnectivityManager.Stub 154 implements PendingIntent.OnFinished { 155 private static final String TAG = "ConnectivityService"; 156 157 private static final boolean DBG = true; 158 private static final boolean VDBG = false; 159 160 private static final boolean LOGD_RULES = false; 161 162 // TODO: create better separation between radio types and network types 163 164 // how long to wait before switching back to a radio's default network 165 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 166 // system property that can override the above value 167 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 168 "android.telephony.apn-restore"; 169 170 // How long to wait before putting up a "This network doesn't have an Internet connection, 171 // connect anyway?" dialog after the user selects a network that doesn't validate. 172 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 173 174 // How long to delay to removal of a pending intent based request. 175 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 176 private final int mReleasePendingIntentDelayMs; 177 178 private Tethering mTethering; 179 180 private final PermissionMonitor mPermissionMonitor; 181 182 private KeyStore mKeyStore; 183 184 @GuardedBy("mVpns") 185 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 186 187 private boolean mLockdownEnabled; 188 private LockdownVpnTracker mLockdownTracker; 189 190 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 191 private Object mRulesLock = new Object(); 192 /** Currently active network rules by UID. */ 193 private SparseIntArray mUidRules = new SparseIntArray(); 194 /** Set of ifaces that are costly. */ 195 private HashSet<String> mMeteredIfaces = Sets.newHashSet(); 196 197 final private Context mContext; 198 private int mNetworkPreference; 199 // 0 is full bad, 100 is full good 200 private int mDefaultInetConditionPublished = 0; 201 202 private Object mDnsLock = new Object(); 203 private int mNumDnsEntries; 204 205 private boolean mTestMode; 206 private static ConnectivityService sServiceInstance; 207 208 private INetworkManagementService mNetd; 209 private INetworkStatsService mStatsService; 210 private INetworkPolicyManager mPolicyManager; 211 212 private String mCurrentTcpBufferSizes; 213 214 private static final int ENABLED = 1; 215 private static final int DISABLED = 0; 216 217 // Arguments to rematchNetworkAndRequests() 218 private enum NascentState { 219 // Indicates a network was just validated for the first time. If the network is found to 220 // be unwanted (i.e. not satisfy any NetworkRequests) it is torn down. 221 JUST_VALIDATED, 222 // Indicates a network was not validated for the first time immediately prior to this call. 223 NOT_JUST_VALIDATED 224 }; 225 private enum ReapUnvalidatedNetworks { 226 // Tear down unvalidated networks that have no chance (i.e. even if validated) of becoming 227 // the highest scoring network satisfying a NetworkRequest. This should be passed when it's 228 // known that there may be unvalidated networks that could potentially be reaped, and when 229 // all networks have been rematched against all NetworkRequests. 230 REAP, 231 // Don't reap unvalidated networks. This should be passed when it's known that there are 232 // no unvalidated networks that could potentially be reaped, and when some networks have 233 // not yet been rematched against all NetworkRequests. 234 DONT_REAP 235 }; 236 237 /** 238 * used internally to change our mobile data enabled flag 239 */ 240 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 241 242 /** 243 * used internally to clear a wakelock when transitioning 244 * from one net to another. Clear happens when we get a new 245 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 246 * after a timeout if no network is found (typically 1 min). 247 */ 248 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 249 250 /** 251 * used internally to reload global proxy settings 252 */ 253 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 254 255 /** 256 * used internally to send a sticky broadcast delayed. 257 */ 258 private static final int EVENT_SEND_STICKY_BROADCAST_INTENT = 11; 259 260 /** 261 * PAC manager has received new port. 262 */ 263 private static final int EVENT_PROXY_HAS_CHANGED = 16; 264 265 /** 266 * used internally when registering NetworkFactories 267 * obj = NetworkFactoryInfo 268 */ 269 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 270 271 /** 272 * used internally when registering NetworkAgents 273 * obj = Messenger 274 */ 275 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 276 277 /** 278 * used to add a network request 279 * includes a NetworkRequestInfo 280 */ 281 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 282 283 /** 284 * indicates a timeout period is over - check if we had a network yet or not 285 * and if not, call the timeout calback (but leave the request live until they 286 * cancel it. 287 * includes a NetworkRequestInfo 288 */ 289 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 290 291 /** 292 * used to add a network listener - no request 293 * includes a NetworkRequestInfo 294 */ 295 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 296 297 /** 298 * used to remove a network request, either a listener or a real request 299 * arg1 = UID of caller 300 * obj = NetworkRequest 301 */ 302 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 303 304 /** 305 * used internally when registering NetworkFactories 306 * obj = Messenger 307 */ 308 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 309 310 /** 311 * used internally to expire a wakelock when transitioning 312 * from one net to another. Expire happens when we fail to find 313 * a new network (typically after 1 minute) - 314 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 315 * a replacement network. 316 */ 317 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 318 319 /** 320 * Used internally to indicate the system is ready. 321 */ 322 private static final int EVENT_SYSTEM_READY = 25; 323 324 /** 325 * used to add a network request with a pending intent 326 * includes a NetworkRequestInfo 327 */ 328 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 329 330 /** 331 * used to remove a pending intent and its associated network request. 332 * arg1 = UID of caller 333 * obj = PendingIntent 334 */ 335 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 336 337 /** 338 * used to specify whether a network should be used even if unvalidated. 339 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 340 * arg2 = whether to remember this choice in the future (1 or 0) 341 * obj = network 342 */ 343 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 344 345 /** 346 * used to ask the user to confirm a connection to an unvalidated network. 347 * obj = network 348 */ 349 private static final int EVENT_PROMPT_UNVALIDATED = 29; 350 351 /** 352 * used internally to (re)configure mobile data always-on settings. 353 */ 354 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 355 356 /** Handler used for internal events. */ 357 final private InternalHandler mHandler; 358 /** Handler used for incoming {@link NetworkStateTracker} events. */ 359 final private NetworkStateTrackerHandler mTrackerHandler; 360 361 private boolean mSystemReady; 362 private Intent mInitialBroadcast; 363 364 private PowerManager.WakeLock mNetTransitionWakeLock; 365 private String mNetTransitionWakeLockCausedBy = ""; 366 private int mNetTransitionWakeLockSerialNumber; 367 private int mNetTransitionWakeLockTimeout; 368 private final PowerManager.WakeLock mPendingIntentWakeLock; 369 370 private InetAddress mDefaultDns; 371 372 // used in DBG mode to track inet condition reports 373 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 374 private ArrayList mInetLog; 375 376 // track the current default http proxy - tell the world if we get a new one (real change) 377 private volatile ProxyInfo mDefaultProxy = null; 378 private Object mProxyLock = new Object(); 379 private boolean mDefaultProxyDisabled = false; 380 381 // track the global proxy. 382 private ProxyInfo mGlobalProxy = null; 383 384 private PacManager mPacManager = null; 385 386 final private SettingsObserver mSettingsObserver; 387 388 private UserManager mUserManager; 389 390 NetworkConfig[] mNetConfigs; 391 int mNetworksDefined; 392 393 // the set of network types that can only be enabled by system/sig apps 394 List mProtectedNetworks; 395 396 private DataConnectionStats mDataConnectionStats; 397 398 TelephonyManager mTelephonyManager; 399 400 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 401 private final static int MIN_NET_ID = 100; // some reserved marks 402 private final static int MAX_NET_ID = 65535; 403 private int mNextNetId = MIN_NET_ID; 404 405 // sequence number of NetworkRequests 406 private int mNextNetworkRequestId = 1; 407 408 /** 409 * Implements support for the legacy "one network per network type" model. 410 * 411 * We used to have a static array of NetworkStateTrackers, one for each 412 * network type, but that doesn't work any more now that we can have, 413 * for example, more that one wifi network. This class stores all the 414 * NetworkAgentInfo objects that support a given type, but the legacy 415 * API will only see the first one. 416 * 417 * It serves two main purposes: 418 * 419 * 1. Provide information about "the network for a given type" (since this 420 * API only supports one). 421 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 422 * the first network for a given type changes, or if the default network 423 * changes. 424 */ 425 private class LegacyTypeTracker { 426 427 private static final boolean DBG = true; 428 private static final boolean VDBG = false; 429 private static final String TAG = "CSLegacyTypeTracker"; 430 431 /** 432 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 433 * Each list holds references to all NetworkAgentInfos that are used to 434 * satisfy requests for that network type. 435 * 436 * This array is built out at startup such that an unsupported network 437 * doesn't get an ArrayList instance, making this a tristate: 438 * unsupported, supported but not active and active. 439 * 440 * The actual lists are populated when we scan the network types that 441 * are supported on this device. 442 */ 443 private ArrayList<NetworkAgentInfo> mTypeLists[]; 444 445 public LegacyTypeTracker() { 446 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 447 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 448 } 449 450 public void addSupportedType(int type) { 451 if (mTypeLists[type] != null) { 452 throw new IllegalStateException( 453 "legacy list for type " + type + "already initialized"); 454 } 455 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 456 } 457 458 public boolean isTypeSupported(int type) { 459 return isNetworkTypeValid(type) && mTypeLists[type] != null; 460 } 461 462 public NetworkAgentInfo getNetworkForType(int type) { 463 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 464 return mTypeLists[type].get(0); 465 } else { 466 return null; 467 } 468 } 469 470 private void maybeLogBroadcast(NetworkAgentInfo nai, boolean connected, int type, 471 boolean isDefaultNetwork) { 472 if (DBG) { 473 log("Sending " + (connected ? "connected" : "disconnected") + 474 " broadcast for type " + type + " " + nai.name() + 475 " isDefaultNetwork=" + isDefaultNetwork); 476 } 477 } 478 479 /** Adds the given network to the specified legacy type list. */ 480 public void add(int type, NetworkAgentInfo nai) { 481 if (!isTypeSupported(type)) { 482 return; // Invalid network type. 483 } 484 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 485 486 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 487 if (list.contains(nai)) { 488 loge("Attempting to register duplicate agent for type " + type + ": " + nai); 489 return; 490 } 491 492 list.add(nai); 493 494 // Send a broadcast if this is the first network of its type or if it's the default. 495 final boolean isDefaultNetwork = isDefaultNetwork(nai); 496 if (list.size() == 1 || isDefaultNetwork) { 497 maybeLogBroadcast(nai, true, type, isDefaultNetwork); 498 sendLegacyNetworkBroadcast(nai, true, type); 499 } 500 } 501 502 /** Removes the given network from the specified legacy type list. */ 503 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 504 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 505 if (list == null || list.isEmpty()) { 506 return; 507 } 508 509 final boolean wasFirstNetwork = list.get(0).equals(nai); 510 511 if (!list.remove(nai)) { 512 return; 513 } 514 515 if (wasFirstNetwork || wasDefault) { 516 maybeLogBroadcast(nai, false, type, wasDefault); 517 sendLegacyNetworkBroadcast(nai, false, type); 518 } 519 520 if (!list.isEmpty() && wasFirstNetwork) { 521 if (DBG) log("Other network available for type " + type + 522 ", sending connected broadcast"); 523 final NetworkAgentInfo replacement = list.get(0); 524 maybeLogBroadcast(replacement, false, type, isDefaultNetwork(replacement)); 525 sendLegacyNetworkBroadcast(replacement, false, type); 526 } 527 } 528 529 /** Removes the given network from all legacy type lists. */ 530 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 531 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 532 for (int type = 0; type < mTypeLists.length; type++) { 533 remove(type, nai, wasDefault); 534 } 535 } 536 537 private String naiToString(NetworkAgentInfo nai) { 538 String name = (nai != null) ? nai.name() : "null"; 539 String state = (nai.networkInfo != null) ? 540 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 541 "???/???"; 542 return name + " " + state; 543 } 544 545 public void dump(IndentingPrintWriter pw) { 546 for (int type = 0; type < mTypeLists.length; type++) { 547 if (mTypeLists[type] == null) continue; 548 pw.print(type + " "); 549 pw.increaseIndent(); 550 if (mTypeLists[type].size() == 0) pw.println("none"); 551 for (NetworkAgentInfo nai : mTypeLists[type]) { 552 pw.println(naiToString(nai)); 553 } 554 pw.decreaseIndent(); 555 } 556 } 557 558 // This class needs its own log method because it has a different TAG. 559 private void log(String s) { 560 Slog.d(TAG, s); 561 } 562 563 } 564 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 565 566 public ConnectivityService(Context context, INetworkManagementService netManager, 567 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 568 if (DBG) log("ConnectivityService starting up"); 569 570 mDefaultRequest = createInternetRequestForTransport(-1); 571 mNetworkRequests.put(mDefaultRequest, new NetworkRequestInfo( 572 null, mDefaultRequest, new Binder(), NetworkRequestInfo.REQUEST)); 573 574 mDefaultMobileDataRequest = createInternetRequestForTransport( 575 NetworkCapabilities.TRANSPORT_CELLULAR); 576 577 HandlerThread handlerThread = new HandlerThread("ConnectivityServiceThread"); 578 handlerThread.start(); 579 mHandler = new InternalHandler(handlerThread.getLooper()); 580 mTrackerHandler = new NetworkStateTrackerHandler(handlerThread.getLooper()); 581 582 // setup our unique device name 583 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 584 String id = Settings.Secure.getString(context.getContentResolver(), 585 Settings.Secure.ANDROID_ID); 586 if (id != null && id.length() > 0) { 587 String name = new String("android-").concat(id); 588 SystemProperties.set("net.hostname", name); 589 } 590 } 591 592 // read our default dns server ip 593 String dns = Settings.Global.getString(context.getContentResolver(), 594 Settings.Global.DEFAULT_DNS_SERVER); 595 if (dns == null || dns.length() == 0) { 596 dns = context.getResources().getString( 597 com.android.internal.R.string.config_default_dns_server); 598 } 599 try { 600 mDefaultDns = NetworkUtils.numericToInetAddress(dns); 601 } catch (IllegalArgumentException e) { 602 loge("Error setting defaultDns using " + dns); 603 } 604 605 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 606 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 607 608 mContext = checkNotNull(context, "missing Context"); 609 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 610 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 611 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 612 mKeyStore = KeyStore.getInstance(); 613 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 614 615 try { 616 mPolicyManager.registerListener(mPolicyListener); 617 } catch (RemoteException e) { 618 // ouch, no rules updates means some processes may never get network 619 loge("unable to register INetworkPolicyListener" + e.toString()); 620 } 621 622 final PowerManager powerManager = (PowerManager) context.getSystemService( 623 Context.POWER_SERVICE); 624 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 625 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 626 com.android.internal.R.integer.config_networkTransitionTimeout); 627 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 628 629 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 630 631 // TODO: What is the "correct" way to do determine if this is a wifi only device? 632 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 633 log("wifiOnly=" + wifiOnly); 634 String[] naStrings = context.getResources().getStringArray( 635 com.android.internal.R.array.networkAttributes); 636 for (String naString : naStrings) { 637 try { 638 NetworkConfig n = new NetworkConfig(naString); 639 if (VDBG) log("naString=" + naString + " config=" + n); 640 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 641 loge("Error in networkAttributes - ignoring attempt to define type " + 642 n.type); 643 continue; 644 } 645 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 646 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 647 n.type); 648 continue; 649 } 650 if (mNetConfigs[n.type] != null) { 651 loge("Error in networkAttributes - ignoring attempt to redefine type " + 652 n.type); 653 continue; 654 } 655 mLegacyTypeTracker.addSupportedType(n.type); 656 657 mNetConfigs[n.type] = n; 658 mNetworksDefined++; 659 } catch(Exception e) { 660 // ignore it - leave the entry null 661 } 662 } 663 664 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 665 if (mNetConfigs[TYPE_VPN] == null) { 666 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 667 // don't need to add TYPE_VPN to mNetConfigs. 668 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 669 mNetworksDefined++; // used only in the log() statement below. 670 } 671 672 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 673 674 mProtectedNetworks = new ArrayList<Integer>(); 675 int[] protectedNetworks = context.getResources().getIntArray( 676 com.android.internal.R.array.config_protectedNetworks); 677 for (int p : protectedNetworks) { 678 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 679 mProtectedNetworks.add(p); 680 } else { 681 if (DBG) loge("Ignoring protectedNetwork " + p); 682 } 683 } 684 685 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 686 && SystemProperties.get("ro.build.type").equals("eng"); 687 688 mTethering = new Tethering(mContext, mNetd, statsService, mHandler.getLooper()); 689 690 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 691 692 //set up the listener for user state for creating user VPNs 693 IntentFilter intentFilter = new IntentFilter(); 694 intentFilter.addAction(Intent.ACTION_USER_STARTING); 695 intentFilter.addAction(Intent.ACTION_USER_STOPPING); 696 mContext.registerReceiverAsUser( 697 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 698 699 try { 700 mNetd.registerObserver(mTethering); 701 mNetd.registerObserver(mDataActivityObserver); 702 } catch (RemoteException e) { 703 loge("Error registering observer :" + e); 704 } 705 706 if (DBG) { 707 mInetLog = new ArrayList(); 708 } 709 710 mSettingsObserver = new SettingsObserver(mContext, mHandler); 711 registerSettingsCallbacks(); 712 713 mDataConnectionStats = new DataConnectionStats(mContext); 714 mDataConnectionStats.startMonitoring(); 715 716 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 717 718 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 719 } 720 721 private NetworkRequest createInternetRequestForTransport(int transportType) { 722 NetworkCapabilities netCap = new NetworkCapabilities(); 723 netCap.addCapability(NET_CAPABILITY_INTERNET); 724 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 725 if (transportType > -1) { 726 netCap.addTransportType(transportType); 727 } 728 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 729 } 730 731 private void handleMobileDataAlwaysOn() { 732 final boolean enable = (Settings.Global.getInt( 733 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 734 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 735 if (enable == isEnabled) { 736 return; // Nothing to do. 737 } 738 739 if (enable) { 740 handleRegisterNetworkRequest(new NetworkRequestInfo( 741 null, mDefaultMobileDataRequest, new Binder(), NetworkRequestInfo.REQUEST)); 742 } else { 743 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 744 } 745 } 746 747 private void registerSettingsCallbacks() { 748 // Watch for global HTTP proxy changes. 749 mSettingsObserver.observe( 750 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 751 EVENT_APPLY_GLOBAL_HTTP_PROXY); 752 753 // Watch for whether or not to keep mobile data always on. 754 mSettingsObserver.observe( 755 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 756 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 757 } 758 759 private synchronized int nextNetworkRequestId() { 760 return mNextNetworkRequestId++; 761 } 762 763 private int reserveNetId() { 764 synchronized (mNetworkForNetId) { 765 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 766 int netId = mNextNetId; 767 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 768 // Make sure NetID unused. http://b/16815182 769 if (!mNetIdInUse.get(netId)) { 770 mNetIdInUse.put(netId, true); 771 return netId; 772 } 773 } 774 } 775 throw new IllegalStateException("No free netIds"); 776 } 777 778 private NetworkState getFilteredNetworkState(int networkType, int uid) { 779 NetworkInfo info = null; 780 LinkProperties lp = null; 781 NetworkCapabilities nc = null; 782 Network network = null; 783 String subscriberId = null; 784 785 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 786 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 787 if (nai != null) { 788 synchronized (nai) { 789 info = new NetworkInfo(nai.networkInfo); 790 lp = new LinkProperties(nai.linkProperties); 791 nc = new NetworkCapabilities(nai.networkCapabilities); 792 // Network objects are outwardly immutable so there is no point to duplicating. 793 // Duplicating also precludes sharing socket factories and connection pools. 794 network = nai.network; 795 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 796 } 797 info.setType(networkType); 798 } else { 799 info = new NetworkInfo(networkType, 0, getNetworkTypeName(networkType), ""); 800 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 801 info.setIsAvailable(true); 802 lp = new LinkProperties(); 803 nc = new NetworkCapabilities(); 804 network = null; 805 } 806 info = getFilteredNetworkInfo(info, lp, uid); 807 } 808 809 return new NetworkState(info, lp, nc, network, subscriberId, null); 810 } 811 812 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 813 if (network == null) { 814 return null; 815 } 816 synchronized (mNetworkForNetId) { 817 return mNetworkForNetId.get(network.netId); 818 } 819 }; 820 821 private Network[] getVpnUnderlyingNetworks(int uid) { 822 if (!mLockdownEnabled) { 823 int user = UserHandle.getUserId(uid); 824 synchronized (mVpns) { 825 Vpn vpn = mVpns.get(user); 826 if (vpn != null && vpn.appliesToUid(uid)) { 827 return vpn.getUnderlyingNetworks(); 828 } 829 } 830 } 831 return null; 832 } 833 834 private NetworkState getUnfilteredActiveNetworkState(int uid) { 835 NetworkInfo info = null; 836 LinkProperties lp = null; 837 NetworkCapabilities nc = null; 838 Network network = null; 839 String subscriberId = null; 840 841 NetworkAgentInfo nai = mNetworkForRequestId.get(mDefaultRequest.requestId); 842 843 final Network[] networks = getVpnUnderlyingNetworks(uid); 844 if (networks != null) { 845 // getUnderlyingNetworks() returns: 846 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 847 // empty array => the VPN explicitly said "no default network". 848 // non-empty array => the VPN specified one or more default networks; we use the 849 // first one. 850 if (networks.length > 0) { 851 nai = getNetworkAgentInfoForNetwork(networks[0]); 852 } else { 853 nai = null; 854 } 855 } 856 857 if (nai != null) { 858 synchronized (nai) { 859 info = new NetworkInfo(nai.networkInfo); 860 lp = new LinkProperties(nai.linkProperties); 861 nc = new NetworkCapabilities(nai.networkCapabilities); 862 // Network objects are outwardly immutable so there is no point to duplicating. 863 // Duplicating also precludes sharing socket factories and connection pools. 864 network = nai.network; 865 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 866 } 867 } 868 869 return new NetworkState(info, lp, nc, network, subscriberId, null); 870 } 871 872 /** 873 * Check if UID should be blocked from using the network with the given LinkProperties. 874 */ 875 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 876 final boolean networkCostly; 877 final int uidRules; 878 879 final String iface = (lp == null ? "" : lp.getInterfaceName()); 880 synchronized (mRulesLock) { 881 networkCostly = mMeteredIfaces.contains(iface); 882 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 883 } 884 885 if ((uidRules & RULE_REJECT_ALL) != 0 886 || (networkCostly && (uidRules & RULE_REJECT_METERED) != 0)) { 887 return true; 888 } 889 890 // no restrictive rules; network is visible 891 return false; 892 } 893 894 /** 895 * Return a filtered {@link NetworkInfo}, potentially marked 896 * {@link DetailedState#BLOCKED} based on 897 * {@link #isNetworkWithLinkPropertiesBlocked}. 898 */ 899 private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, LinkProperties lp, int uid) { 900 if (info != null && isNetworkWithLinkPropertiesBlocked(lp, uid)) { 901 // network is blocked; clone and override state 902 info = new NetworkInfo(info); 903 info.setDetailedState(DetailedState.BLOCKED, null, null); 904 if (DBG) { 905 log("returning Blocked NetworkInfo for ifname=" + 906 lp.getInterfaceName() + ", uid=" + uid); 907 } 908 } 909 if (info != null && mLockdownTracker != null) { 910 info = mLockdownTracker.augmentNetworkInfo(info); 911 if (DBG) log("returning Locked NetworkInfo"); 912 } 913 return info; 914 } 915 916 /** 917 * Return NetworkInfo for the active (i.e., connected) network interface. 918 * It is assumed that at most one network is active at a time. If more 919 * than one is active, it is indeterminate which will be returned. 920 * @return the info for the active network, or {@code null} if none is 921 * active 922 */ 923 @Override 924 public NetworkInfo getActiveNetworkInfo() { 925 enforceAccessPermission(); 926 final int uid = Binder.getCallingUid(); 927 NetworkState state = getUnfilteredActiveNetworkState(uid); 928 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 929 } 930 931 @Override 932 public Network getActiveNetwork() { 933 enforceAccessPermission(); 934 final int uid = Binder.getCallingUid(); 935 final int user = UserHandle.getUserId(uid); 936 int vpnNetId = NETID_UNSET; 937 synchronized (mVpns) { 938 final Vpn vpn = mVpns.get(user); 939 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 940 } 941 NetworkAgentInfo nai; 942 if (vpnNetId != NETID_UNSET) { 943 synchronized (mNetworkForNetId) { 944 nai = mNetworkForNetId.get(vpnNetId); 945 } 946 if (nai != null) return nai.network; 947 } 948 nai = getDefaultNetwork(); 949 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 950 return nai != null ? nai.network : null; 951 } 952 953 /** 954 * Find the first Provisioning network. 955 * 956 * @return NetworkInfo or null if none. 957 */ 958 private NetworkInfo getProvisioningNetworkInfo() { 959 enforceAccessPermission(); 960 961 // Find the first Provisioning Network 962 NetworkInfo provNi = null; 963 for (NetworkInfo ni : getAllNetworkInfo()) { 964 if (ni.isConnectedToProvisioningNetwork()) { 965 provNi = ni; 966 break; 967 } 968 } 969 if (DBG) log("getProvisioningNetworkInfo: X provNi=" + provNi); 970 return provNi; 971 } 972 973 /** 974 * Find the first Provisioning network or the ActiveDefaultNetwork 975 * if there is no Provisioning network 976 * 977 * @return NetworkInfo or null if none. 978 */ 979 @Override 980 public NetworkInfo getProvisioningOrActiveNetworkInfo() { 981 enforceAccessPermission(); 982 983 NetworkInfo provNi = getProvisioningNetworkInfo(); 984 if (provNi == null) { 985 provNi = getActiveNetworkInfo(); 986 } 987 if (DBG) log("getProvisioningOrActiveNetworkInfo: X provNi=" + provNi); 988 return provNi; 989 } 990 991 public NetworkInfo getActiveNetworkInfoUnfiltered() { 992 enforceAccessPermission(); 993 final int uid = Binder.getCallingUid(); 994 NetworkState state = getUnfilteredActiveNetworkState(uid); 995 return state.networkInfo; 996 } 997 998 @Override 999 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 1000 enforceConnectivityInternalPermission(); 1001 NetworkState state = getUnfilteredActiveNetworkState(uid); 1002 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1003 } 1004 1005 @Override 1006 public NetworkInfo getNetworkInfo(int networkType) { 1007 enforceAccessPermission(); 1008 final int uid = Binder.getCallingUid(); 1009 if (getVpnUnderlyingNetworks(uid) != null) { 1010 // A VPN is active, so we may need to return one of its underlying networks. This 1011 // information is not available in LegacyTypeTracker, so we have to get it from 1012 // getUnfilteredActiveNetworkState. 1013 NetworkState state = getUnfilteredActiveNetworkState(uid); 1014 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1015 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1016 } 1017 } 1018 NetworkState state = getFilteredNetworkState(networkType, uid); 1019 return state.networkInfo; 1020 } 1021 1022 @Override 1023 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1024 enforceAccessPermission(); 1025 final int uid = Binder.getCallingUid(); 1026 NetworkInfo info = null; 1027 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1028 if (nai != null) { 1029 synchronized (nai) { 1030 info = new NetworkInfo(nai.networkInfo); 1031 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1032 } 1033 } 1034 return info; 1035 } 1036 1037 @Override 1038 public NetworkInfo[] getAllNetworkInfo() { 1039 enforceAccessPermission(); 1040 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1041 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1042 networkType++) { 1043 NetworkInfo info = getNetworkInfo(networkType); 1044 if (info != null) { 1045 result.add(info); 1046 } 1047 } 1048 return result.toArray(new NetworkInfo[result.size()]); 1049 } 1050 1051 @Override 1052 public Network getNetworkForType(int networkType) { 1053 enforceAccessPermission(); 1054 final int uid = Binder.getCallingUid(); 1055 NetworkState state = getFilteredNetworkState(networkType, uid); 1056 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1057 return state.network; 1058 } 1059 return null; 1060 } 1061 1062 @Override 1063 public Network[] getAllNetworks() { 1064 enforceAccessPermission(); 1065 synchronized (mNetworkForNetId) { 1066 final Network[] result = new Network[mNetworkForNetId.size()]; 1067 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1068 result[i] = mNetworkForNetId.valueAt(i).network; 1069 } 1070 return result; 1071 } 1072 } 1073 1074 private NetworkCapabilities getNetworkCapabilitiesAndValidation(NetworkAgentInfo nai) { 1075 if (nai != null) { 1076 synchronized (nai) { 1077 if (nai.created) { 1078 NetworkCapabilities nc = new NetworkCapabilities(nai.networkCapabilities); 1079 if (nai.lastValidated) { 1080 nc.addCapability(NET_CAPABILITY_VALIDATED); 1081 } else { 1082 nc.removeCapability(NET_CAPABILITY_VALIDATED); 1083 } 1084 return nc; 1085 } 1086 } 1087 } 1088 return null; 1089 } 1090 1091 @Override 1092 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1093 // The basic principle is: if an app's traffic could possibly go over a 1094 // network, without the app doing anything multinetwork-specific, 1095 // (hence, by "default"), then include that network's capabilities in 1096 // the array. 1097 // 1098 // In the normal case, app traffic only goes over the system's default 1099 // network connection, so that's the only network returned. 1100 // 1101 // With a VPN in force, some app traffic may go into the VPN, and thus 1102 // over whatever underlying networks the VPN specifies, while other app 1103 // traffic may go over the system default network (e.g.: a split-tunnel 1104 // VPN, or an app disallowed by the VPN), so the set of networks 1105 // returned includes the VPN's underlying networks and the system 1106 // default. 1107 enforceAccessPermission(); 1108 1109 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1110 1111 NetworkAgentInfo nai = getDefaultNetwork(); 1112 NetworkCapabilities nc = getNetworkCapabilitiesAndValidation(getDefaultNetwork()); 1113 if (nc != null) { 1114 result.put(nai.network, nc); 1115 } 1116 1117 if (!mLockdownEnabled) { 1118 synchronized (mVpns) { 1119 Vpn vpn = mVpns.get(userId); 1120 if (vpn != null) { 1121 Network[] networks = vpn.getUnderlyingNetworks(); 1122 if (networks != null) { 1123 for (Network network : networks) { 1124 nai = getNetworkAgentInfoForNetwork(network); 1125 nc = getNetworkCapabilitiesAndValidation(nai); 1126 if (nc != null) { 1127 result.put(nai.network, nc); 1128 } 1129 } 1130 } 1131 } 1132 } 1133 } 1134 1135 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1136 out = result.values().toArray(out); 1137 return out; 1138 } 1139 1140 @Override 1141 public boolean isNetworkSupported(int networkType) { 1142 enforceAccessPermission(); 1143 return mLegacyTypeTracker.isTypeSupported(networkType); 1144 } 1145 1146 /** 1147 * Return LinkProperties for the active (i.e., connected) default 1148 * network interface. It is assumed that at most one default network 1149 * is active at a time. If more than one is active, it is indeterminate 1150 * which will be returned. 1151 * @return the ip properties for the active network, or {@code null} if 1152 * none is active 1153 */ 1154 @Override 1155 public LinkProperties getActiveLinkProperties() { 1156 enforceAccessPermission(); 1157 final int uid = Binder.getCallingUid(); 1158 NetworkState state = getUnfilteredActiveNetworkState(uid); 1159 return state.linkProperties; 1160 } 1161 1162 @Override 1163 public LinkProperties getLinkPropertiesForType(int networkType) { 1164 enforceAccessPermission(); 1165 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1166 if (nai != null) { 1167 synchronized (nai) { 1168 return new LinkProperties(nai.linkProperties); 1169 } 1170 } 1171 return null; 1172 } 1173 1174 // TODO - this should be ALL networks 1175 @Override 1176 public LinkProperties getLinkProperties(Network network) { 1177 enforceAccessPermission(); 1178 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1179 if (nai != null) { 1180 synchronized (nai) { 1181 return new LinkProperties(nai.linkProperties); 1182 } 1183 } 1184 return null; 1185 } 1186 1187 @Override 1188 public NetworkCapabilities getNetworkCapabilities(Network network) { 1189 enforceAccessPermission(); 1190 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1191 if (nai != null) { 1192 synchronized (nai) { 1193 NetworkCapabilities nc = new NetworkCapabilities(nai.networkCapabilities); 1194 if (nai.lastValidated) { 1195 nc.addCapability(NET_CAPABILITY_VALIDATED); 1196 } else { 1197 nc.removeCapability(NET_CAPABILITY_VALIDATED); 1198 } 1199 return nc; 1200 } 1201 } 1202 return null; 1203 } 1204 1205 @Override 1206 public NetworkState[] getAllNetworkState() { 1207 // Require internal since we're handing out IMSI details 1208 enforceConnectivityInternalPermission(); 1209 1210 final ArrayList<NetworkState> result = Lists.newArrayList(); 1211 for (Network network : getAllNetworks()) { 1212 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1213 if (nai != null) { 1214 synchronized (nai) { 1215 final String subscriberId = (nai.networkMisc != null) 1216 ? nai.networkMisc.subscriberId : null; 1217 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1218 nai.networkCapabilities, network, subscriberId, null)); 1219 } 1220 } 1221 } 1222 return result.toArray(new NetworkState[result.size()]); 1223 } 1224 1225 @Override 1226 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1227 enforceAccessPermission(); 1228 final int uid = Binder.getCallingUid(); 1229 final long token = Binder.clearCallingIdentity(); 1230 try { 1231 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1232 if (state.networkInfo != null) { 1233 try { 1234 return mPolicyManager.getNetworkQuotaInfo(state); 1235 } catch (RemoteException e) { 1236 } 1237 } 1238 return null; 1239 } finally { 1240 Binder.restoreCallingIdentity(token); 1241 } 1242 } 1243 1244 @Override 1245 public boolean isActiveNetworkMetered() { 1246 enforceAccessPermission(); 1247 final int uid = Binder.getCallingUid(); 1248 final long token = Binder.clearCallingIdentity(); 1249 try { 1250 return isActiveNetworkMeteredUnchecked(uid); 1251 } finally { 1252 Binder.restoreCallingIdentity(token); 1253 } 1254 } 1255 1256 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1257 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1258 if (state.networkInfo != null) { 1259 try { 1260 return mPolicyManager.isNetworkMetered(state); 1261 } catch (RemoteException e) { 1262 } 1263 } 1264 return false; 1265 } 1266 1267 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1268 @Override 1269 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1270 int deviceType = Integer.parseInt(label); 1271 sendDataActivityBroadcast(deviceType, active, tsNanos); 1272 } 1273 }; 1274 1275 /** 1276 * Ensure that a network route exists to deliver traffic to the specified 1277 * host via the specified network interface. 1278 * @param networkType the type of the network over which traffic to the 1279 * specified host is to be routed 1280 * @param hostAddress the IP address of the host to which the route is 1281 * desired 1282 * @return {@code true} on success, {@code false} on failure 1283 */ 1284 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1285 enforceChangePermission(); 1286 if (mProtectedNetworks.contains(networkType)) { 1287 enforceConnectivityInternalPermission(); 1288 } 1289 1290 InetAddress addr; 1291 try { 1292 addr = InetAddress.getByAddress(hostAddress); 1293 } catch (UnknownHostException e) { 1294 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1295 return false; 1296 } 1297 1298 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1299 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1300 return false; 1301 } 1302 1303 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1304 if (nai == null) { 1305 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1306 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1307 } else { 1308 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1309 } 1310 return false; 1311 } 1312 1313 DetailedState netState; 1314 synchronized (nai) { 1315 netState = nai.networkInfo.getDetailedState(); 1316 } 1317 1318 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1319 if (VDBG) { 1320 log("requestRouteToHostAddress on down network " 1321 + "(" + networkType + ") - dropped" 1322 + " netState=" + netState); 1323 } 1324 return false; 1325 } 1326 1327 final int uid = Binder.getCallingUid(); 1328 final long token = Binder.clearCallingIdentity(); 1329 try { 1330 LinkProperties lp; 1331 int netId; 1332 synchronized (nai) { 1333 lp = nai.linkProperties; 1334 netId = nai.network.netId; 1335 } 1336 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1337 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1338 return ok; 1339 } finally { 1340 Binder.restoreCallingIdentity(token); 1341 } 1342 } 1343 1344 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1345 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1346 if (bestRoute == null) { 1347 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1348 } else { 1349 String iface = bestRoute.getInterface(); 1350 if (bestRoute.getGateway().equals(addr)) { 1351 // if there is no better route, add the implied hostroute for our gateway 1352 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1353 } else { 1354 // if we will connect to this through another route, add a direct route 1355 // to it's gateway 1356 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1357 } 1358 } 1359 if (DBG) log("Adding " + bestRoute + " for interface " + bestRoute.getInterface()); 1360 try { 1361 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1362 } catch (Exception e) { 1363 // never crash - catch them all 1364 if (DBG) loge("Exception trying to add a route: " + e); 1365 return false; 1366 } 1367 return true; 1368 } 1369 1370 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1371 @Override 1372 public void onUidRulesChanged(int uid, int uidRules) { 1373 // caller is NPMS, since we only register with them 1374 if (LOGD_RULES) { 1375 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1376 } 1377 1378 synchronized (mRulesLock) { 1379 // skip update when we've already applied rules 1380 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1381 if (oldRules == uidRules) return; 1382 1383 mUidRules.put(uid, uidRules); 1384 } 1385 1386 // TODO: notify UID when it has requested targeted updates 1387 } 1388 1389 @Override 1390 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1391 // caller is NPMS, since we only register with them 1392 if (LOGD_RULES) { 1393 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1394 } 1395 1396 synchronized (mRulesLock) { 1397 mMeteredIfaces.clear(); 1398 for (String iface : meteredIfaces) { 1399 mMeteredIfaces.add(iface); 1400 } 1401 } 1402 } 1403 1404 @Override 1405 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1406 // caller is NPMS, since we only register with them 1407 if (LOGD_RULES) { 1408 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1409 } 1410 } 1411 }; 1412 1413 private void enforceInternetPermission() { 1414 mContext.enforceCallingOrSelfPermission( 1415 android.Manifest.permission.INTERNET, 1416 "ConnectivityService"); 1417 } 1418 1419 private void enforceAccessPermission() { 1420 mContext.enforceCallingOrSelfPermission( 1421 android.Manifest.permission.ACCESS_NETWORK_STATE, 1422 "ConnectivityService"); 1423 } 1424 1425 private void enforceChangePermission() { 1426 mContext.enforceCallingOrSelfPermission( 1427 android.Manifest.permission.CHANGE_NETWORK_STATE, 1428 "ConnectivityService"); 1429 } 1430 1431 private void enforceTetherAccessPermission() { 1432 mContext.enforceCallingOrSelfPermission( 1433 android.Manifest.permission.ACCESS_NETWORK_STATE, 1434 "ConnectivityService"); 1435 } 1436 1437 private void enforceConnectivityInternalPermission() { 1438 mContext.enforceCallingOrSelfPermission( 1439 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1440 "ConnectivityService"); 1441 } 1442 1443 public void sendConnectedBroadcast(NetworkInfo info) { 1444 enforceConnectivityInternalPermission(); 1445 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1446 } 1447 1448 private void sendInetConditionBroadcast(NetworkInfo info) { 1449 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1450 } 1451 1452 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1453 if (mLockdownTracker != null) { 1454 info = mLockdownTracker.augmentNetworkInfo(info); 1455 } 1456 1457 Intent intent = new Intent(bcastType); 1458 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1459 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1460 if (info.isFailover()) { 1461 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1462 info.setFailover(false); 1463 } 1464 if (info.getReason() != null) { 1465 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1466 } 1467 if (info.getExtraInfo() != null) { 1468 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1469 info.getExtraInfo()); 1470 } 1471 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1472 return intent; 1473 } 1474 1475 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1476 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1477 } 1478 1479 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1480 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1481 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1482 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1483 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1484 final long ident = Binder.clearCallingIdentity(); 1485 try { 1486 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1487 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1488 } finally { 1489 Binder.restoreCallingIdentity(ident); 1490 } 1491 } 1492 1493 private void sendStickyBroadcast(Intent intent) { 1494 synchronized(this) { 1495 if (!mSystemReady) { 1496 mInitialBroadcast = new Intent(intent); 1497 } 1498 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1499 if (DBG) { 1500 log("sendStickyBroadcast: action=" + intent.getAction()); 1501 } 1502 1503 final long ident = Binder.clearCallingIdentity(); 1504 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1505 final IBatteryStats bs = BatteryStatsService.getService(); 1506 try { 1507 NetworkInfo ni = intent.getParcelableExtra( 1508 ConnectivityManager.EXTRA_NETWORK_INFO); 1509 bs.noteConnectivityChanged(intent.getIntExtra( 1510 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1511 ni != null ? ni.getState().toString() : "?"); 1512 } catch (RemoteException e) { 1513 } 1514 } 1515 try { 1516 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 1517 } finally { 1518 Binder.restoreCallingIdentity(ident); 1519 } 1520 } 1521 } 1522 1523 void systemReady() { 1524 loadGlobalProxy(); 1525 1526 synchronized(this) { 1527 mSystemReady = true; 1528 if (mInitialBroadcast != null) { 1529 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1530 mInitialBroadcast = null; 1531 } 1532 } 1533 // load the global proxy at startup 1534 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1535 1536 // Try bringing up tracker, but if KeyStore isn't ready yet, wait 1537 // for user to unlock device. 1538 if (!updateLockdownVpn()) { 1539 final IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT); 1540 mContext.registerReceiver(mUserPresentReceiver, filter); 1541 } 1542 1543 // Configure whether mobile data is always on. 1544 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1545 1546 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1547 1548 mPermissionMonitor.startMonitoring(); 1549 } 1550 1551 private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() { 1552 @Override 1553 public void onReceive(Context context, Intent intent) { 1554 // Try creating lockdown tracker, since user present usually means 1555 // unlocked keystore. 1556 if (updateLockdownVpn()) { 1557 mContext.unregisterReceiver(this); 1558 } 1559 } 1560 }; 1561 1562 /** @hide */ 1563 @Override 1564 public void captivePortalCheckCompleted(NetworkInfo info, boolean isCaptivePortal) { 1565 enforceConnectivityInternalPermission(); 1566 if (DBG) log("captivePortalCheckCompleted: ni=" + info + " captive=" + isCaptivePortal); 1567// mNetTrackers[info.getType()].captivePortalCheckCompleted(isCaptivePortal); 1568 } 1569 1570 /** 1571 * Setup data activity tracking for the given network. 1572 * 1573 * Every {@code setupDataActivityTracking} should be paired with a 1574 * {@link #removeDataActivityTracking} for cleanup. 1575 */ 1576 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1577 final String iface = networkAgent.linkProperties.getInterfaceName(); 1578 1579 final int timeout; 1580 int type = ConnectivityManager.TYPE_NONE; 1581 1582 if (networkAgent.networkCapabilities.hasTransport( 1583 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1584 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1585 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1586 5); 1587 type = ConnectivityManager.TYPE_MOBILE; 1588 } else if (networkAgent.networkCapabilities.hasTransport( 1589 NetworkCapabilities.TRANSPORT_WIFI)) { 1590 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1591 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1592 5); 1593 type = ConnectivityManager.TYPE_WIFI; 1594 } else { 1595 // do not track any other networks 1596 timeout = 0; 1597 } 1598 1599 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1600 try { 1601 mNetd.addIdleTimer(iface, timeout, type); 1602 } catch (Exception e) { 1603 // You shall not crash! 1604 loge("Exception in setupDataActivityTracking " + e); 1605 } 1606 } 1607 } 1608 1609 /** 1610 * Remove data activity tracking when network disconnects. 1611 */ 1612 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1613 final String iface = networkAgent.linkProperties.getInterfaceName(); 1614 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1615 1616 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1617 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1618 try { 1619 // the call fails silently if no idletimer setup for this interface 1620 mNetd.removeIdleTimer(iface); 1621 } catch (Exception e) { 1622 loge("Exception in removeDataActivityTracking " + e); 1623 } 1624 } 1625 } 1626 1627 /** 1628 * Reads the network specific MTU size from reources. 1629 * and set it on it's iface. 1630 */ 1631 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1632 final String iface = newLp.getInterfaceName(); 1633 final int mtu = newLp.getMtu(); 1634 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1635 if (VDBG) log("identical MTU - not setting"); 1636 return; 1637 } 1638 1639 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1640 loge("Unexpected mtu value: " + mtu + ", " + iface); 1641 return; 1642 } 1643 1644 // Cannot set MTU without interface name 1645 if (TextUtils.isEmpty(iface)) { 1646 loge("Setting MTU size with null iface."); 1647 return; 1648 } 1649 1650 try { 1651 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1652 mNetd.setMtu(iface, mtu); 1653 } catch (Exception e) { 1654 Slog.e(TAG, "exception in setMtu()" + e); 1655 } 1656 } 1657 1658 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1659 1660 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1661 if (isDefaultNetwork(nai) == false) { 1662 return; 1663 } 1664 1665 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1666 String[] values = null; 1667 if (tcpBufferSizes != null) { 1668 values = tcpBufferSizes.split(","); 1669 } 1670 1671 if (values == null || values.length != 6) { 1672 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1673 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1674 values = tcpBufferSizes.split(","); 1675 } 1676 1677 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1678 1679 try { 1680 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1681 1682 final String prefix = "/sys/kernel/ipv4/tcp_"; 1683 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1684 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1685 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1686 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1687 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1688 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1689 mCurrentTcpBufferSizes = tcpBufferSizes; 1690 } catch (IOException e) { 1691 loge("Can't set TCP buffer sizes:" + e); 1692 } 1693 1694 final String defaultRwndKey = "net.tcp.default_init_rwnd"; 1695 int defaultRwndValue = SystemProperties.getInt(defaultRwndKey, 0); 1696 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1697 Settings.Global.TCP_DEFAULT_INIT_RWND, defaultRwndValue); 1698 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1699 if (rwndValue != 0) { 1700 SystemProperties.set(sysctlKey, rwndValue.toString()); 1701 } 1702 } 1703 1704 private void flushVmDnsCache() { 1705 /* 1706 * Tell the VMs to toss their DNS caches 1707 */ 1708 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1709 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1710 /* 1711 * Connectivity events can happen before boot has completed ... 1712 */ 1713 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1714 final long ident = Binder.clearCallingIdentity(); 1715 try { 1716 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1717 } finally { 1718 Binder.restoreCallingIdentity(ident); 1719 } 1720 } 1721 1722 @Override 1723 public int getRestoreDefaultNetworkDelay(int networkType) { 1724 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1725 NETWORK_RESTORE_DELAY_PROP_NAME); 1726 if(restoreDefaultNetworkDelayStr != null && 1727 restoreDefaultNetworkDelayStr.length() != 0) { 1728 try { 1729 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1730 } catch (NumberFormatException e) { 1731 } 1732 } 1733 // if the system property isn't set, use the value for the apn type 1734 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1735 1736 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1737 (mNetConfigs[networkType] != null)) { 1738 ret = mNetConfigs[networkType].restoreTime; 1739 } 1740 return ret; 1741 } 1742 1743 @Override 1744 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1745 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1746 if (mContext.checkCallingOrSelfPermission( 1747 android.Manifest.permission.DUMP) 1748 != PackageManager.PERMISSION_GRANTED) { 1749 pw.println("Permission Denial: can't dump ConnectivityService " + 1750 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1751 Binder.getCallingUid()); 1752 return; 1753 } 1754 1755 pw.println("NetworkFactories for:"); 1756 pw.increaseIndent(); 1757 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1758 pw.println(nfi.name); 1759 } 1760 pw.decreaseIndent(); 1761 pw.println(); 1762 1763 NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId); 1764 pw.print("Active default network: "); 1765 if (defaultNai == null) { 1766 pw.println("none"); 1767 } else { 1768 pw.println(defaultNai.network.netId); 1769 } 1770 pw.println(); 1771 1772 pw.println("Current Networks:"); 1773 pw.increaseIndent(); 1774 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1775 pw.println(nai.toString()); 1776 pw.increaseIndent(); 1777 pw.println("Requests:"); 1778 pw.increaseIndent(); 1779 for (int i = 0; i < nai.networkRequests.size(); i++) { 1780 pw.println(nai.networkRequests.valueAt(i).toString()); 1781 } 1782 pw.decreaseIndent(); 1783 pw.println("Lingered:"); 1784 pw.increaseIndent(); 1785 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1786 pw.decreaseIndent(); 1787 pw.decreaseIndent(); 1788 } 1789 pw.decreaseIndent(); 1790 pw.println(); 1791 1792 pw.println("Network Requests:"); 1793 pw.increaseIndent(); 1794 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1795 pw.println(nri.toString()); 1796 } 1797 pw.println(); 1798 pw.decreaseIndent(); 1799 1800 pw.println("mLegacyTypeTracker:"); 1801 pw.increaseIndent(); 1802 mLegacyTypeTracker.dump(pw); 1803 pw.decreaseIndent(); 1804 pw.println(); 1805 1806 synchronized (this) { 1807 pw.println("NetworkTransitionWakeLock is currently " + 1808 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held."); 1809 pw.println("It was last requested for "+mNetTransitionWakeLockCausedBy); 1810 } 1811 pw.println(); 1812 1813 mTethering.dump(fd, pw, args); 1814 1815 if (mInetLog != null) { 1816 pw.println(); 1817 pw.println("Inet condition reports:"); 1818 pw.increaseIndent(); 1819 for(int i = 0; i < mInetLog.size(); i++) { 1820 pw.println(mInetLog.get(i)); 1821 } 1822 pw.decreaseIndent(); 1823 } 1824 } 1825 1826 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, String msg) { 1827 if (nai.network == null) return false; 1828 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1829 if (officialNai != null && officialNai.equals(nai)) return true; 1830 if (officialNai != null || VDBG) { 1831 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1832 " - " + nai); 1833 } 1834 return false; 1835 } 1836 1837 private boolean isRequest(NetworkRequest request) { 1838 return mNetworkRequests.get(request).isRequest; 1839 } 1840 1841 // must be stateless - things change under us. 1842 private class NetworkStateTrackerHandler extends Handler { 1843 public NetworkStateTrackerHandler(Looper looper) { 1844 super(looper); 1845 } 1846 1847 @Override 1848 public void handleMessage(Message msg) { 1849 NetworkInfo info; 1850 switch (msg.what) { 1851 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1852 handleAsyncChannelHalfConnect(msg); 1853 break; 1854 } 1855 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1856 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1857 if (nai != null) nai.asyncChannel.disconnect(); 1858 break; 1859 } 1860 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1861 handleAsyncChannelDisconnected(msg); 1862 break; 1863 } 1864 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1865 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1866 if (nai == null) { 1867 loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent"); 1868 } else { 1869 updateCapabilities(nai, (NetworkCapabilities)msg.obj); 1870 } 1871 break; 1872 } 1873 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1874 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1875 if (nai == null) { 1876 loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED"); 1877 } else { 1878 if (VDBG) { 1879 log("Update of LinkProperties for " + nai.name() + 1880 "; created=" + nai.created); 1881 } 1882 LinkProperties oldLp = nai.linkProperties; 1883 synchronized (nai) { 1884 nai.linkProperties = (LinkProperties)msg.obj; 1885 } 1886 if (nai.created) updateLinkProperties(nai, oldLp); 1887 } 1888 break; 1889 } 1890 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1891 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1892 if (nai == null) { 1893 loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent"); 1894 break; 1895 } 1896 info = (NetworkInfo) msg.obj; 1897 updateNetworkInfo(nai, info); 1898 break; 1899 } 1900 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1901 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1902 if (nai == null) { 1903 loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent"); 1904 break; 1905 } 1906 Integer score = (Integer) msg.obj; 1907 if (score != null) updateNetworkScore(nai, score.intValue()); 1908 break; 1909 } 1910 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 1911 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1912 if (nai == null) { 1913 loge("EVENT_UID_RANGES_ADDED from unknown NetworkAgent"); 1914 break; 1915 } 1916 try { 1917 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1918 } catch (Exception e) { 1919 // Never crash! 1920 loge("Exception in addVpnUidRanges: " + e); 1921 } 1922 break; 1923 } 1924 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 1925 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1926 if (nai == null) { 1927 loge("EVENT_UID_RANGES_REMOVED from unknown NetworkAgent"); 1928 break; 1929 } 1930 try { 1931 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1932 } catch (Exception e) { 1933 // Never crash! 1934 loge("Exception in removeVpnUidRanges: " + e); 1935 } 1936 break; 1937 } 1938 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 1939 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1940 if (nai == null) { 1941 loge("EVENT_SET_EXPLICITLY_SELECTED from unknown NetworkAgent"); 1942 break; 1943 } 1944 if (nai.created && !nai.networkMisc.explicitlySelected) { 1945 loge("ERROR: created network explicitly selected."); 1946 } 1947 nai.networkMisc.explicitlySelected = true; 1948 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 1949 break; 1950 } 1951 case NetworkMonitor.EVENT_NETWORK_TESTED: { 1952 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 1953 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_VALIDATED")) { 1954 boolean valid = (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 1955 nai.lastValidated = valid; 1956 if (valid) { 1957 if (DBG) log("Validated " + nai.name()); 1958 if (!nai.everValidated) { 1959 nai.everValidated = true; 1960 rematchNetworkAndRequests(nai, NascentState.JUST_VALIDATED, 1961 ReapUnvalidatedNetworks.REAP); 1962 // If score has changed, rebroadcast to NetworkFactories. b/17726566 1963 sendUpdatedScoreToFactories(nai); 1964 } 1965 } 1966 updateInetCondition(nai); 1967 // Let the NetworkAgent know the state of its network 1968 nai.asyncChannel.sendMessage( 1969 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 1970 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 1971 0, null); 1972 1973 // TODO: trigger a NetworkCapabilities update so that the dialog can know 1974 // that the network is now validated and close itself. 1975 } 1976 break; 1977 } 1978 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 1979 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 1980 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_LINGER_COMPLETE")) { 1981 handleLingerComplete(nai); 1982 } 1983 break; 1984 } 1985 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 1986 if (msg.arg1 == 0) { 1987 setProvNotificationVisibleIntent(false, msg.arg2, 0, null, null); 1988 } else { 1989 final NetworkAgentInfo nai; 1990 synchronized (mNetworkForNetId) { 1991 nai = mNetworkForNetId.get(msg.arg2); 1992 } 1993 if (nai == null) { 1994 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 1995 break; 1996 } 1997 nai.captivePortalDetected = true; 1998 setProvNotificationVisibleIntent(true, msg.arg2, nai.networkInfo.getType(), 1999 nai.networkInfo.getExtraInfo(), (PendingIntent)msg.obj); 2000 } 2001 break; 2002 } 2003 } 2004 } 2005 } 2006 2007 // Cancel any lingering so the linger timeout doesn't teardown a network. 2008 // This should be called when a network begins satisfying a NetworkRequest. 2009 // Note: depending on what state the NetworkMonitor is in (e.g., 2010 // if it's awaiting captive portal login, or if validation failed), this 2011 // may trigger a re-evaluation of the network. 2012 private void unlinger(NetworkAgentInfo nai) { 2013 if (VDBG) log("Canceling linger of " + nai.name()); 2014 // If network has never been validated, it cannot have been lingered, so don't bother 2015 // needlessly triggering a re-evaluation. 2016 if (!nai.everValidated) return; 2017 nai.networkLingered.clear(); 2018 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2019 } 2020 2021 private void handleAsyncChannelHalfConnect(Message msg) { 2022 AsyncChannel ac = (AsyncChannel) msg.obj; 2023 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2024 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2025 if (VDBG) log("NetworkFactory connected"); 2026 // A network factory has connected. Send it all current NetworkRequests. 2027 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2028 if (nri.isRequest == false) continue; 2029 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2030 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2031 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2032 } 2033 } else { 2034 loge("Error connecting NetworkFactory"); 2035 mNetworkFactoryInfos.remove(msg.obj); 2036 } 2037 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2038 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2039 if (VDBG) log("NetworkAgent connected"); 2040 // A network agent has requested a connection. Establish the connection. 2041 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2042 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2043 } else { 2044 loge("Error connecting NetworkAgent"); 2045 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2046 if (nai != null) { 2047 final boolean wasDefault = isDefaultNetwork(nai); 2048 synchronized (mNetworkForNetId) { 2049 mNetworkForNetId.remove(nai.network.netId); 2050 mNetIdInUse.delete(nai.network.netId); 2051 } 2052 // Just in case. 2053 mLegacyTypeTracker.remove(nai, wasDefault); 2054 } 2055 } 2056 } 2057 } 2058 2059 private void handleAsyncChannelDisconnected(Message msg) { 2060 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2061 if (nai != null) { 2062 if (DBG) { 2063 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2064 } 2065 // A network agent has disconnected. 2066 if (nai.created) { 2067 // Tell netd to clean up the configuration for this network 2068 // (routing rules, DNS, etc). 2069 try { 2070 mNetd.removeNetwork(nai.network.netId); 2071 } catch (Exception e) { 2072 loge("Exception removing network: " + e); 2073 } 2074 } 2075 // TODO - if we move the logic to the network agent (have them disconnect 2076 // because they lost all their requests or because their score isn't good) 2077 // then they would disconnect organically, report their new state and then 2078 // disconnect the channel. 2079 if (nai.networkInfo.isConnected()) { 2080 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2081 null, null); 2082 } 2083 final boolean wasDefault = isDefaultNetwork(nai); 2084 if (wasDefault) { 2085 mDefaultInetConditionPublished = 0; 2086 } 2087 notifyIfacesChanged(); 2088 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2089 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2090 mNetworkAgentInfos.remove(msg.replyTo); 2091 updateClat(null, nai.linkProperties, nai); 2092 synchronized (mNetworkForNetId) { 2093 mNetworkForNetId.remove(nai.network.netId); 2094 mNetIdInUse.delete(nai.network.netId); 2095 } 2096 // Since we've lost the network, go through all the requests that 2097 // it was satisfying and see if any other factory can satisfy them. 2098 // TODO: This logic may be better replaced with a call to rematchAllNetworksAndRequests 2099 final ArrayList<NetworkAgentInfo> toActivate = new ArrayList<NetworkAgentInfo>(); 2100 for (int i = 0; i < nai.networkRequests.size(); i++) { 2101 NetworkRequest request = nai.networkRequests.valueAt(i); 2102 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2103 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2104 if (DBG) { 2105 log("Checking for replacement network to handle request " + request ); 2106 } 2107 mNetworkForRequestId.remove(request.requestId); 2108 sendUpdatedScoreToFactories(request, 0); 2109 NetworkAgentInfo alternative = null; 2110 for (NetworkAgentInfo existing : mNetworkAgentInfos.values()) { 2111 if (existing.satisfies(request) && 2112 (alternative == null || 2113 alternative.getCurrentScore() < existing.getCurrentScore())) { 2114 alternative = existing; 2115 } 2116 } 2117 if (alternative != null) { 2118 if (DBG) log(" found replacement in " + alternative.name()); 2119 if (!toActivate.contains(alternative)) { 2120 toActivate.add(alternative); 2121 } 2122 } 2123 } 2124 } 2125 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2126 removeDataActivityTracking(nai); 2127 notifyLockdownVpn(nai); 2128 requestNetworkTransitionWakelock(nai.name()); 2129 } 2130 mLegacyTypeTracker.remove(nai, wasDefault); 2131 for (NetworkAgentInfo networkToActivate : toActivate) { 2132 unlinger(networkToActivate); 2133 rematchNetworkAndRequests(networkToActivate, NascentState.NOT_JUST_VALIDATED, 2134 ReapUnvalidatedNetworks.DONT_REAP); 2135 } 2136 } 2137 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2138 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2139 } 2140 2141 // If this method proves to be too slow then we can maintain a separate 2142 // pendingIntent => NetworkRequestInfo map. 2143 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2144 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2145 Intent intent = pendingIntent.getIntent(); 2146 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2147 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2148 if (existingPendingIntent != null && 2149 existingPendingIntent.getIntent().filterEquals(intent)) { 2150 return entry.getValue(); 2151 } 2152 } 2153 return null; 2154 } 2155 2156 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2157 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2158 2159 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2160 if (existingRequest != null) { // remove the existing request. 2161 if (DBG) log("Replacing " + existingRequest.request + " with " 2162 + nri.request + " because their intents matched."); 2163 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2164 } 2165 handleRegisterNetworkRequest(nri); 2166 } 2167 2168 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2169 mNetworkRequests.put(nri.request, nri); 2170 2171 // TODO: This logic may be better replaced with a call to rematchNetworkAndRequests 2172 2173 // Check for the best currently alive network that satisfies this request 2174 NetworkAgentInfo bestNetwork = null; 2175 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2176 if (DBG) log("handleRegisterNetworkRequest checking " + network.name()); 2177 if (network.satisfies(nri.request)) { 2178 if (DBG) log("apparently satisfied. currentScore=" + network.getCurrentScore()); 2179 if (!nri.isRequest) { 2180 // Not setting bestNetwork here as a listening NetworkRequest may be 2181 // satisfied by multiple Networks. Instead the request is added to 2182 // each satisfying Network and notified about each. 2183 network.addRequest(nri.request); 2184 notifyNetworkCallback(network, nri); 2185 } else if (bestNetwork == null || 2186 bestNetwork.getCurrentScore() < network.getCurrentScore()) { 2187 bestNetwork = network; 2188 } 2189 } 2190 } 2191 if (bestNetwork != null) { 2192 if (DBG) log("using " + bestNetwork.name()); 2193 unlinger(bestNetwork); 2194 bestNetwork.addRequest(nri.request); 2195 mNetworkForRequestId.put(nri.request.requestId, bestNetwork); 2196 notifyNetworkCallback(bestNetwork, nri); 2197 if (nri.request.legacyType != TYPE_NONE) { 2198 mLegacyTypeTracker.add(nri.request.legacyType, bestNetwork); 2199 } 2200 } 2201 2202 if (nri.isRequest) { 2203 if (DBG) log("sending new NetworkRequest to factories"); 2204 final int score = bestNetwork == null ? 0 : bestNetwork.getCurrentScore(); 2205 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2206 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 2207 0, nri.request); 2208 } 2209 } 2210 } 2211 2212 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2213 int callingUid) { 2214 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2215 if (nri != null) { 2216 handleReleaseNetworkRequest(nri.request, callingUid); 2217 } 2218 } 2219 2220 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2221 // For validated Networks this is simply whether it is satsifying any NetworkRequests. 2222 // For unvalidated Networks this is whether it is satsifying any NetworkRequests or 2223 // were it to become validated, would it have a chance of satisfying any NetworkRequests. 2224 private boolean unneeded(NetworkAgentInfo nai) { 2225 if (!nai.created || nai.isVPN()) return false; 2226 boolean unneeded = true; 2227 if (nai.everValidated) { 2228 for (int i = 0; i < nai.networkRequests.size() && unneeded; i++) { 2229 final NetworkRequest nr = nai.networkRequests.valueAt(i); 2230 try { 2231 if (isRequest(nr)) unneeded = false; 2232 } catch (Exception e) { 2233 loge("Request " + nr + " not found in mNetworkRequests."); 2234 loge(" it came from request list of " + nai.name()); 2235 } 2236 } 2237 } else { 2238 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2239 // If this Network is already the highest scoring Network for a request, or if 2240 // there is hope for it to become one if it validated, then it is needed. 2241 if (nri.isRequest && nai.satisfies(nri.request) && 2242 (nai.networkRequests.get(nri.request.requestId) != null || 2243 // Note that this catches two important cases: 2244 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2245 // is currently satisfying the request. This is desirable when 2246 // cellular ends up validating but WiFi does not. 2247 // 2. Unvalidated WiFi will not be reaped when validated cellular 2248 // is currently satsifying the request. This is desirable when 2249 // WiFi ends up validating and out scoring cellular. 2250 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2251 nai.getCurrentScoreAsValidated())) { 2252 unneeded = false; 2253 break; 2254 } 2255 } 2256 } 2257 return unneeded; 2258 } 2259 2260 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2261 NetworkRequestInfo nri = mNetworkRequests.get(request); 2262 if (nri != null) { 2263 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2264 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2265 return; 2266 } 2267 if (DBG) log("releasing NetworkRequest " + request); 2268 nri.unlinkDeathRecipient(); 2269 mNetworkRequests.remove(request); 2270 if (nri.isRequest) { 2271 // Find all networks that are satisfying this request and remove the request 2272 // from their request lists. 2273 // TODO - it's my understanding that for a request there is only a single 2274 // network satisfying it, so this loop is wasteful 2275 boolean wasKept = false; 2276 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2277 if (nai.networkRequests.get(nri.request.requestId) != null) { 2278 nai.networkRequests.remove(nri.request.requestId); 2279 if (DBG) { 2280 log(" Removing from current network " + nai.name() + 2281 ", leaving " + nai.networkRequests.size() + 2282 " requests."); 2283 } 2284 if (unneeded(nai)) { 2285 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2286 teardownUnneededNetwork(nai); 2287 } else { 2288 // suspect there should only be one pass through here 2289 // but if any were kept do the check below 2290 wasKept |= true; 2291 } 2292 } 2293 } 2294 2295 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2296 if (nai != null) { 2297 mNetworkForRequestId.remove(nri.request.requestId); 2298 } 2299 // Maintain the illusion. When this request arrived, we might have pretended 2300 // that a network connected to serve it, even though the network was already 2301 // connected. Now that this request has gone away, we might have to pretend 2302 // that the network disconnected. LegacyTypeTracker will generate that 2303 // phantom disconnect for this type. 2304 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2305 boolean doRemove = true; 2306 if (wasKept) { 2307 // check if any of the remaining requests for this network are for the 2308 // same legacy type - if so, don't remove the nai 2309 for (int i = 0; i < nai.networkRequests.size(); i++) { 2310 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2311 if (otherRequest.legacyType == nri.request.legacyType && 2312 isRequest(otherRequest)) { 2313 if (DBG) log(" still have other legacy request - leaving"); 2314 doRemove = false; 2315 } 2316 } 2317 } 2318 2319 if (doRemove) { 2320 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2321 } 2322 } 2323 2324 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2325 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2326 nri.request); 2327 } 2328 } else { 2329 // listens don't have a singular affectedNetwork. Check all networks to see 2330 // if this listen request applies and remove it. 2331 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2332 nai.networkRequests.remove(nri.request.requestId); 2333 } 2334 } 2335 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2336 } 2337 } 2338 2339 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2340 enforceConnectivityInternalPermission(); 2341 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2342 accept ? 1 : 0, always ? 1: 0, network)); 2343 } 2344 2345 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2346 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2347 " accept=" + accept + " always=" + always); 2348 2349 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2350 if (nai == null) { 2351 // Nothing to do. 2352 return; 2353 } 2354 2355 if (nai.everValidated) { 2356 // The network validated while the dialog box was up. Don't make any changes. There's a 2357 // TODO in the dialog code to make it go away if the network validates; once that's 2358 // implemented, taking action here will be confusing. 2359 return; 2360 } 2361 2362 if (!nai.networkMisc.explicitlySelected) { 2363 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2364 } 2365 2366 if (accept != nai.networkMisc.acceptUnvalidated) { 2367 int oldScore = nai.getCurrentScore(); 2368 nai.networkMisc.acceptUnvalidated = accept; 2369 rematchAllNetworksAndRequests(nai, oldScore); 2370 sendUpdatedScoreToFactories(nai); 2371 } 2372 2373 if (always) { 2374 nai.asyncChannel.sendMessage( 2375 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2376 } 2377 2378 // TODO: should we also disconnect from the network if accept is false? 2379 } 2380 2381 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2382 mHandler.sendMessageDelayed( 2383 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2384 PROMPT_UNVALIDATED_DELAY_MS); 2385 } 2386 2387 private void handlePromptUnvalidated(Network network) { 2388 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2389 2390 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2391 // we haven't already been told to switch to it regardless of whether it validated or not. 2392 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2393 if (nai == null || nai.everValidated || nai.captivePortalDetected || 2394 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2395 return; 2396 } 2397 2398 // TODO: What should we do if we've already switched to this network because we had no 2399 // better option? There are two obvious alternatives. 2400 // 2401 // 1. Decide that there's no point prompting because this is our only usable network. 2402 // However, because we didn't prompt, if later on a validated network comes along, we'll 2403 // either a) silently switch to it - bad if the user wanted to connect to stay on this 2404 // unvalidated network - or b) prompt the user at that later time - bad because the user 2405 // might not understand why they are now being prompted. 2406 // 2407 // 2. Always prompt the user, even if we have no other network to use. The user could then 2408 // try to find an alternative network to join (remember, if we got here, then the user 2409 // selected this network manually). This is bad because the prompt isn't really very 2410 // useful. 2411 // 2412 // For now we do #1, but we can revisit that later. 2413 if (isDefaultNetwork(nai)) { 2414 return; 2415 } 2416 2417 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2418 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, network); 2419 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2420 intent.setClassName("com.android.settings", 2421 "com.android.settings.wifi.WifiNoInternetDialog"); 2422 mContext.startActivityAsUser(intent, UserHandle.CURRENT); 2423 } 2424 2425 private class InternalHandler extends Handler { 2426 public InternalHandler(Looper looper) { 2427 super(looper); 2428 } 2429 2430 @Override 2431 public void handleMessage(Message msg) { 2432 switch (msg.what) { 2433 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2434 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2435 String causedBy = null; 2436 synchronized (ConnectivityService.this) { 2437 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2438 mNetTransitionWakeLock.isHeld()) { 2439 mNetTransitionWakeLock.release(); 2440 causedBy = mNetTransitionWakeLockCausedBy; 2441 } else { 2442 break; 2443 } 2444 } 2445 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2446 log("Failed to find a new network - expiring NetTransition Wakelock"); 2447 } else { 2448 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2449 " cleared because we found a replacement network"); 2450 } 2451 break; 2452 } 2453 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2454 handleDeprecatedGlobalHttpProxy(); 2455 break; 2456 } 2457 case EVENT_SEND_STICKY_BROADCAST_INTENT: { 2458 Intent intent = (Intent)msg.obj; 2459 sendStickyBroadcast(intent); 2460 break; 2461 } 2462 case EVENT_PROXY_HAS_CHANGED: { 2463 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2464 break; 2465 } 2466 case EVENT_REGISTER_NETWORK_FACTORY: { 2467 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2468 break; 2469 } 2470 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2471 handleUnregisterNetworkFactory((Messenger)msg.obj); 2472 break; 2473 } 2474 case EVENT_REGISTER_NETWORK_AGENT: { 2475 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2476 break; 2477 } 2478 case EVENT_REGISTER_NETWORK_REQUEST: 2479 case EVENT_REGISTER_NETWORK_LISTENER: { 2480 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2481 break; 2482 } 2483 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: { 2484 handleRegisterNetworkRequestWithIntent(msg); 2485 break; 2486 } 2487 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2488 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2489 break; 2490 } 2491 case EVENT_RELEASE_NETWORK_REQUEST: { 2492 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2493 break; 2494 } 2495 case EVENT_SET_ACCEPT_UNVALIDATED: { 2496 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2497 break; 2498 } 2499 case EVENT_PROMPT_UNVALIDATED: { 2500 handlePromptUnvalidated((Network) msg.obj); 2501 break; 2502 } 2503 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2504 handleMobileDataAlwaysOn(); 2505 break; 2506 } 2507 case EVENT_SYSTEM_READY: { 2508 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2509 nai.networkMonitor.systemReady = true; 2510 } 2511 break; 2512 } 2513 } 2514 } 2515 } 2516 2517 // javadoc from interface 2518 public int tether(String iface) { 2519 ConnectivityManager.enforceTetherChangePermission(mContext); 2520 if (isTetheringSupported()) { 2521 return mTethering.tether(iface); 2522 } else { 2523 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2524 } 2525 } 2526 2527 // javadoc from interface 2528 public int untether(String iface) { 2529 ConnectivityManager.enforceTetherChangePermission(mContext); 2530 2531 if (isTetheringSupported()) { 2532 return mTethering.untether(iface); 2533 } else { 2534 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2535 } 2536 } 2537 2538 // javadoc from interface 2539 public int getLastTetherError(String iface) { 2540 enforceTetherAccessPermission(); 2541 2542 if (isTetheringSupported()) { 2543 return mTethering.getLastTetherError(iface); 2544 } else { 2545 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2546 } 2547 } 2548 2549 // TODO - proper iface API for selection by property, inspection, etc 2550 public String[] getTetherableUsbRegexs() { 2551 enforceTetherAccessPermission(); 2552 if (isTetheringSupported()) { 2553 return mTethering.getTetherableUsbRegexs(); 2554 } else { 2555 return new String[0]; 2556 } 2557 } 2558 2559 public String[] getTetherableWifiRegexs() { 2560 enforceTetherAccessPermission(); 2561 if (isTetheringSupported()) { 2562 return mTethering.getTetherableWifiRegexs(); 2563 } else { 2564 return new String[0]; 2565 } 2566 } 2567 2568 public String[] getTetherableBluetoothRegexs() { 2569 enforceTetherAccessPermission(); 2570 if (isTetheringSupported()) { 2571 return mTethering.getTetherableBluetoothRegexs(); 2572 } else { 2573 return new String[0]; 2574 } 2575 } 2576 2577 public int setUsbTethering(boolean enable) { 2578 ConnectivityManager.enforceTetherChangePermission(mContext); 2579 if (isTetheringSupported()) { 2580 return mTethering.setUsbTethering(enable); 2581 } else { 2582 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2583 } 2584 } 2585 2586 // TODO - move iface listing, queries, etc to new module 2587 // javadoc from interface 2588 public String[] getTetherableIfaces() { 2589 enforceTetherAccessPermission(); 2590 return mTethering.getTetherableIfaces(); 2591 } 2592 2593 public String[] getTetheredIfaces() { 2594 enforceTetherAccessPermission(); 2595 return mTethering.getTetheredIfaces(); 2596 } 2597 2598 public String[] getTetheringErroredIfaces() { 2599 enforceTetherAccessPermission(); 2600 return mTethering.getErroredIfaces(); 2601 } 2602 2603 public String[] getTetheredDhcpRanges() { 2604 enforceConnectivityInternalPermission(); 2605 return mTethering.getTetheredDhcpRanges(); 2606 } 2607 2608 // if ro.tether.denied = true we default to no tethering 2609 // gservices could set the secure setting to 1 though to enable it on a build where it 2610 // had previously been turned off. 2611 public boolean isTetheringSupported() { 2612 enforceTetherAccessPermission(); 2613 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2614 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2615 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2616 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2617 return tetherEnabledInSettings && ((mTethering.getTetherableUsbRegexs().length != 0 || 2618 mTethering.getTetherableWifiRegexs().length != 0 || 2619 mTethering.getTetherableBluetoothRegexs().length != 0) && 2620 mTethering.getUpstreamIfaceTypes().length != 0); 2621 } 2622 2623 // Called when we lose the default network and have no replacement yet. 2624 // This will automatically be cleared after X seconds or a new default network 2625 // becomes CONNECTED, whichever happens first. The timer is started by the 2626 // first caller and not restarted by subsequent callers. 2627 private void requestNetworkTransitionWakelock(String forWhom) { 2628 int serialNum = 0; 2629 synchronized (this) { 2630 if (mNetTransitionWakeLock.isHeld()) return; 2631 serialNum = ++mNetTransitionWakeLockSerialNumber; 2632 mNetTransitionWakeLock.acquire(); 2633 mNetTransitionWakeLockCausedBy = forWhom; 2634 } 2635 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2636 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2637 mNetTransitionWakeLockTimeout); 2638 return; 2639 } 2640 2641 // 100 percent is full good, 0 is full bad. 2642 public void reportInetCondition(int networkType, int percentage) { 2643 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2644 if (nai == null) return; 2645 reportNetworkConnectivity(nai.network, percentage > 50); 2646 } 2647 2648 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2649 enforceAccessPermission(); 2650 enforceInternetPermission(); 2651 2652 NetworkAgentInfo nai; 2653 if (network == null) { 2654 nai = getDefaultNetwork(); 2655 } else { 2656 nai = getNetworkAgentInfoForNetwork(network); 2657 } 2658 if (nai == null) return; 2659 // Revalidate if the app report does not match our current validated state. 2660 if (hasConnectivity == nai.lastValidated) return; 2661 final int uid = Binder.getCallingUid(); 2662 if (DBG) { 2663 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2664 ") by " + uid); 2665 } 2666 synchronized (nai) { 2667 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2668 // which isn't meant to work on uncreated networks. 2669 if (!nai.created) return; 2670 2671 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2672 2673 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2674 } 2675 } 2676 2677 public void captivePortalAppResponse(Network network, int response, String actionToken) { 2678 if (response == ConnectivityManager.CAPTIVE_PORTAL_APP_RETURN_WANTED_AS_IS) { 2679 enforceConnectivityInternalPermission(); 2680 } 2681 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2682 if (nai == null) return; 2683 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_CAPTIVE_PORTAL_APP_FINISHED, response, 0, 2684 actionToken); 2685 } 2686 2687 public ProxyInfo getDefaultProxy() { 2688 // this information is already available as a world read/writable jvm property 2689 // so this API change wouldn't have a benifit. It also breaks the passing 2690 // of proxy info to all the JVMs. 2691 // enforceAccessPermission(); 2692 synchronized (mProxyLock) { 2693 ProxyInfo ret = mGlobalProxy; 2694 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2695 return ret; 2696 } 2697 } 2698 2699 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2700 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2701 // proxy is null then there is no proxy in place). 2702 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2703 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2704 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2705 proxy = null; 2706 } 2707 return proxy; 2708 } 2709 2710 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2711 // better for determining if a new proxy broadcast is necessary: 2712 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2713 // avoid unnecessary broadcasts. 2714 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2715 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2716 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2717 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2718 // all set. 2719 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2720 a = canonicalizeProxyInfo(a); 2721 b = canonicalizeProxyInfo(b); 2722 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2723 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2724 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2725 } 2726 2727 public void setGlobalProxy(ProxyInfo proxyProperties) { 2728 enforceConnectivityInternalPermission(); 2729 2730 synchronized (mProxyLock) { 2731 if (proxyProperties == mGlobalProxy) return; 2732 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2733 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2734 2735 String host = ""; 2736 int port = 0; 2737 String exclList = ""; 2738 String pacFileUrl = ""; 2739 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2740 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2741 if (!proxyProperties.isValid()) { 2742 if (DBG) 2743 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2744 return; 2745 } 2746 mGlobalProxy = new ProxyInfo(proxyProperties); 2747 host = mGlobalProxy.getHost(); 2748 port = mGlobalProxy.getPort(); 2749 exclList = mGlobalProxy.getExclusionListAsString(); 2750 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2751 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2752 } 2753 } else { 2754 mGlobalProxy = null; 2755 } 2756 ContentResolver res = mContext.getContentResolver(); 2757 final long token = Binder.clearCallingIdentity(); 2758 try { 2759 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2760 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2761 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2762 exclList); 2763 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2764 } finally { 2765 Binder.restoreCallingIdentity(token); 2766 } 2767 2768 if (mGlobalProxy == null) { 2769 proxyProperties = mDefaultProxy; 2770 } 2771 sendProxyBroadcast(proxyProperties); 2772 } 2773 } 2774 2775 private void loadGlobalProxy() { 2776 ContentResolver res = mContext.getContentResolver(); 2777 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2778 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2779 String exclList = Settings.Global.getString(res, 2780 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2781 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2782 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2783 ProxyInfo proxyProperties; 2784 if (!TextUtils.isEmpty(pacFileUrl)) { 2785 proxyProperties = new ProxyInfo(pacFileUrl); 2786 } else { 2787 proxyProperties = new ProxyInfo(host, port, exclList); 2788 } 2789 if (!proxyProperties.isValid()) { 2790 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2791 return; 2792 } 2793 2794 synchronized (mProxyLock) { 2795 mGlobalProxy = proxyProperties; 2796 } 2797 } 2798 } 2799 2800 public ProxyInfo getGlobalProxy() { 2801 // this information is already available as a world read/writable jvm property 2802 // so this API change wouldn't have a benifit. It also breaks the passing 2803 // of proxy info to all the JVMs. 2804 // enforceAccessPermission(); 2805 synchronized (mProxyLock) { 2806 return mGlobalProxy; 2807 } 2808 } 2809 2810 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2811 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2812 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2813 proxy = null; 2814 } 2815 synchronized (mProxyLock) { 2816 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2817 if (mDefaultProxy == proxy) return; // catches repeated nulls 2818 if (proxy != null && !proxy.isValid()) { 2819 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2820 return; 2821 } 2822 2823 // This call could be coming from the PacManager, containing the port of the local 2824 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2825 // global (to get the correct local port), and send a broadcast. 2826 // TODO: Switch PacManager to have its own message to send back rather than 2827 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2828 if ((mGlobalProxy != null) && (proxy != null) 2829 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2830 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2831 mGlobalProxy = proxy; 2832 sendProxyBroadcast(mGlobalProxy); 2833 return; 2834 } 2835 mDefaultProxy = proxy; 2836 2837 if (mGlobalProxy != null) return; 2838 if (!mDefaultProxyDisabled) { 2839 sendProxyBroadcast(proxy); 2840 } 2841 } 2842 } 2843 2844 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2845 // This method gets called when any network changes proxy, but the broadcast only ever contains 2846 // the default proxy (even if it hasn't changed). 2847 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2848 // world where an app might be bound to a non-default network. 2849 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2850 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2851 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2852 2853 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2854 sendProxyBroadcast(getDefaultProxy()); 2855 } 2856 } 2857 2858 private void handleDeprecatedGlobalHttpProxy() { 2859 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2860 Settings.Global.HTTP_PROXY); 2861 if (!TextUtils.isEmpty(proxy)) { 2862 String data[] = proxy.split(":"); 2863 if (data.length == 0) { 2864 return; 2865 } 2866 2867 String proxyHost = data[0]; 2868 int proxyPort = 8080; 2869 if (data.length > 1) { 2870 try { 2871 proxyPort = Integer.parseInt(data[1]); 2872 } catch (NumberFormatException e) { 2873 return; 2874 } 2875 } 2876 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2877 setGlobalProxy(p); 2878 } 2879 } 2880 2881 private void sendProxyBroadcast(ProxyInfo proxy) { 2882 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2883 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2884 if (DBG) log("sending Proxy Broadcast for " + proxy); 2885 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2886 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2887 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2888 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2889 final long ident = Binder.clearCallingIdentity(); 2890 try { 2891 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2892 } finally { 2893 Binder.restoreCallingIdentity(ident); 2894 } 2895 } 2896 2897 private static class SettingsObserver extends ContentObserver { 2898 final private HashMap<Uri, Integer> mUriEventMap; 2899 final private Context mContext; 2900 final private Handler mHandler; 2901 2902 SettingsObserver(Context context, Handler handler) { 2903 super(null); 2904 mUriEventMap = new HashMap<Uri, Integer>(); 2905 mContext = context; 2906 mHandler = handler; 2907 } 2908 2909 void observe(Uri uri, int what) { 2910 mUriEventMap.put(uri, what); 2911 final ContentResolver resolver = mContext.getContentResolver(); 2912 resolver.registerContentObserver(uri, false, this); 2913 } 2914 2915 @Override 2916 public void onChange(boolean selfChange) { 2917 Slog.wtf(TAG, "Should never be reached."); 2918 } 2919 2920 @Override 2921 public void onChange(boolean selfChange, Uri uri) { 2922 final Integer what = mUriEventMap.get(uri); 2923 if (what != null) { 2924 mHandler.obtainMessage(what.intValue()).sendToTarget(); 2925 } else { 2926 loge("No matching event to send for URI=" + uri); 2927 } 2928 } 2929 } 2930 2931 private static void log(String s) { 2932 Slog.d(TAG, s); 2933 } 2934 2935 private static void loge(String s) { 2936 Slog.e(TAG, s); 2937 } 2938 2939 private static <T> T checkNotNull(T value, String message) { 2940 if (value == null) { 2941 throw new NullPointerException(message); 2942 } 2943 return value; 2944 } 2945 2946 /** 2947 * Prepare for a VPN application. 2948 * Permissions are checked in Vpn class. 2949 * @hide 2950 */ 2951 @Override 2952 public boolean prepareVpn(String oldPackage, String newPackage) { 2953 throwIfLockdownEnabled(); 2954 int user = UserHandle.getUserId(Binder.getCallingUid()); 2955 synchronized(mVpns) { 2956 return mVpns.get(user).prepare(oldPackage, newPackage); 2957 } 2958 } 2959 2960 /** 2961 * Set whether the current VPN package has the ability to launch VPNs without 2962 * user intervention. This method is used by system-privileged apps. 2963 * Permissions are checked in Vpn class. 2964 * @hide 2965 */ 2966 @Override 2967 public void setVpnPackageAuthorization(boolean authorized) { 2968 int user = UserHandle.getUserId(Binder.getCallingUid()); 2969 synchronized(mVpns) { 2970 mVpns.get(user).setPackageAuthorization(authorized); 2971 } 2972 } 2973 2974 /** 2975 * Configure a TUN interface and return its file descriptor. Parameters 2976 * are encoded and opaque to this class. This method is used by VpnBuilder 2977 * and not available in ConnectivityManager. Permissions are checked in 2978 * Vpn class. 2979 * @hide 2980 */ 2981 @Override 2982 public ParcelFileDescriptor establishVpn(VpnConfig config) { 2983 throwIfLockdownEnabled(); 2984 int user = UserHandle.getUserId(Binder.getCallingUid()); 2985 synchronized(mVpns) { 2986 return mVpns.get(user).establish(config); 2987 } 2988 } 2989 2990 /** 2991 * Start legacy VPN, controlling native daemons as needed. Creates a 2992 * secondary thread to perform connection work, returning quickly. 2993 */ 2994 @Override 2995 public void startLegacyVpn(VpnProfile profile) { 2996 throwIfLockdownEnabled(); 2997 final LinkProperties egress = getActiveLinkProperties(); 2998 if (egress == null) { 2999 throw new IllegalStateException("Missing active network connection"); 3000 } 3001 int user = UserHandle.getUserId(Binder.getCallingUid()); 3002 synchronized(mVpns) { 3003 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3004 } 3005 } 3006 3007 /** 3008 * Return the information of the ongoing legacy VPN. This method is used 3009 * by VpnSettings and not available in ConnectivityManager. Permissions 3010 * are checked in Vpn class. 3011 */ 3012 @Override 3013 public LegacyVpnInfo getLegacyVpnInfo() { 3014 throwIfLockdownEnabled(); 3015 int user = UserHandle.getUserId(Binder.getCallingUid()); 3016 synchronized(mVpns) { 3017 return mVpns.get(user).getLegacyVpnInfo(); 3018 } 3019 } 3020 3021 /** 3022 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3023 * and not available in ConnectivityManager. 3024 */ 3025 @Override 3026 public VpnInfo[] getAllVpnInfo() { 3027 enforceConnectivityInternalPermission(); 3028 if (mLockdownEnabled) { 3029 return new VpnInfo[0]; 3030 } 3031 3032 synchronized(mVpns) { 3033 List<VpnInfo> infoList = new ArrayList<>(); 3034 for (int i = 0; i < mVpns.size(); i++) { 3035 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3036 if (info != null) { 3037 infoList.add(info); 3038 } 3039 } 3040 return infoList.toArray(new VpnInfo[infoList.size()]); 3041 } 3042 } 3043 3044 /** 3045 * @return VPN information for accounting, or null if we can't retrieve all required 3046 * information, e.g primary underlying iface. 3047 */ 3048 @Nullable 3049 private VpnInfo createVpnInfo(Vpn vpn) { 3050 VpnInfo info = vpn.getVpnInfo(); 3051 if (info == null) { 3052 return null; 3053 } 3054 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3055 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3056 // the underlyingNetworks list. 3057 if (underlyingNetworks == null) { 3058 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3059 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3060 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3061 } 3062 } else if (underlyingNetworks.length > 0) { 3063 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3064 if (linkProperties != null) { 3065 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3066 } 3067 } 3068 return info.primaryUnderlyingIface == null ? null : info; 3069 } 3070 3071 /** 3072 * Returns the information of the ongoing VPN. This method is used by VpnDialogs and 3073 * not available in ConnectivityManager. 3074 * Permissions are checked in Vpn class. 3075 * @hide 3076 */ 3077 @Override 3078 public VpnConfig getVpnConfig() { 3079 int user = UserHandle.getUserId(Binder.getCallingUid()); 3080 synchronized(mVpns) { 3081 return mVpns.get(user).getVpnConfig(); 3082 } 3083 } 3084 3085 @Override 3086 public boolean updateLockdownVpn() { 3087 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3088 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3089 return false; 3090 } 3091 3092 // Tear down existing lockdown if profile was removed 3093 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3094 if (mLockdownEnabled) { 3095 if (!mKeyStore.isUnlocked()) { 3096 Slog.w(TAG, "KeyStore locked; unable to create LockdownTracker"); 3097 return false; 3098 } 3099 3100 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3101 final VpnProfile profile = VpnProfile.decode( 3102 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3103 int user = UserHandle.getUserId(Binder.getCallingUid()); 3104 synchronized(mVpns) { 3105 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, mVpns.get(user), 3106 profile)); 3107 } 3108 } else { 3109 setLockdownTracker(null); 3110 } 3111 3112 return true; 3113 } 3114 3115 /** 3116 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3117 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3118 */ 3119 private void setLockdownTracker(LockdownVpnTracker tracker) { 3120 // Shutdown any existing tracker 3121 final LockdownVpnTracker existing = mLockdownTracker; 3122 mLockdownTracker = null; 3123 if (existing != null) { 3124 existing.shutdown(); 3125 } 3126 3127 try { 3128 if (tracker != null) { 3129 mNetd.setFirewallEnabled(true); 3130 mNetd.setFirewallInterfaceRule("lo", true); 3131 mLockdownTracker = tracker; 3132 mLockdownTracker.init(); 3133 } else { 3134 mNetd.setFirewallEnabled(false); 3135 } 3136 } catch (RemoteException e) { 3137 // ignored; NMS lives inside system_server 3138 } 3139 } 3140 3141 private void throwIfLockdownEnabled() { 3142 if (mLockdownEnabled) { 3143 throw new IllegalStateException("Unavailable in lockdown mode"); 3144 } 3145 } 3146 3147 @Override 3148 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3149 // TODO: Remove? Any reason to trigger a provisioning check? 3150 return -1; 3151 } 3152 3153 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3154 private volatile boolean mIsNotificationVisible = false; 3155 3156 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3157 if (DBG) { 3158 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3159 + " action=" + action); 3160 } 3161 Intent intent = new Intent(action); 3162 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3163 // Concatenate the range of types onto the range of NetIDs. 3164 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3165 setProvNotificationVisibleIntent(visible, id, networkType, null, pendingIntent); 3166 } 3167 3168 /** 3169 * Show or hide network provisioning notificaitons. 3170 * 3171 * @param id an identifier that uniquely identifies this notification. This must match 3172 * between show and hide calls. We use the NetID value but for legacy callers 3173 * we concatenate the range of types with the range of NetIDs. 3174 */ 3175 private void setProvNotificationVisibleIntent(boolean visible, int id, int networkType, 3176 String extraInfo, PendingIntent intent) { 3177 if (DBG) { 3178 log("setProvNotificationVisibleIntent: E visible=" + visible + " networkType=" + 3179 networkType + " extraInfo=" + extraInfo); 3180 } 3181 3182 Resources r = Resources.getSystem(); 3183 NotificationManager notificationManager = (NotificationManager) mContext 3184 .getSystemService(Context.NOTIFICATION_SERVICE); 3185 3186 if (visible) { 3187 CharSequence title; 3188 CharSequence details; 3189 int icon; 3190 Notification notification = new Notification(); 3191 switch (networkType) { 3192 case ConnectivityManager.TYPE_WIFI: 3193 title = r.getString(R.string.wifi_available_sign_in, 0); 3194 details = r.getString(R.string.network_available_sign_in_detailed, 3195 extraInfo); 3196 icon = R.drawable.stat_notify_wifi_in_range; 3197 break; 3198 case ConnectivityManager.TYPE_MOBILE: 3199 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3200 title = r.getString(R.string.network_available_sign_in, 0); 3201 // TODO: Change this to pull from NetworkInfo once a printable 3202 // name has been added to it 3203 details = mTelephonyManager.getNetworkOperatorName(); 3204 icon = R.drawable.stat_notify_rssi_in_range; 3205 break; 3206 default: 3207 title = r.getString(R.string.network_available_sign_in, 0); 3208 details = r.getString(R.string.network_available_sign_in_detailed, 3209 extraInfo); 3210 icon = R.drawable.stat_notify_rssi_in_range; 3211 break; 3212 } 3213 3214 notification.when = 0; 3215 notification.icon = icon; 3216 notification.flags = Notification.FLAG_AUTO_CANCEL; 3217 notification.tickerText = title; 3218 notification.color = mContext.getColor( 3219 com.android.internal.R.color.system_notification_accent_color); 3220 notification.setLatestEventInfo(mContext, title, details, notification.contentIntent); 3221 notification.contentIntent = intent; 3222 3223 try { 3224 notificationManager.notify(NOTIFICATION_ID, id, notification); 3225 } catch (NullPointerException npe) { 3226 loge("setNotificaitionVisible: visible notificationManager npe=" + npe); 3227 npe.printStackTrace(); 3228 } 3229 } else { 3230 try { 3231 notificationManager.cancel(NOTIFICATION_ID, id); 3232 } catch (NullPointerException npe) { 3233 loge("setNotificaitionVisible: cancel notificationManager npe=" + npe); 3234 npe.printStackTrace(); 3235 } 3236 } 3237 mIsNotificationVisible = visible; 3238 } 3239 3240 /** Location to an updatable file listing carrier provisioning urls. 3241 * An example: 3242 * 3243 * <?xml version="1.0" encoding="utf-8"?> 3244 * <provisioningUrls> 3245 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3246 * <redirectedUrl mcc="310" mnc="4">http://www.google.com</redirectedUrl> 3247 * </provisioningUrls> 3248 */ 3249 private static final String PROVISIONING_URL_PATH = 3250 "/data/misc/radio/provisioning_urls.xml"; 3251 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3252 3253 /** XML tag for root element. */ 3254 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3255 /** XML tag for individual url */ 3256 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3257 /** XML tag for redirected url */ 3258 private static final String TAG_REDIRECTED_URL = "redirectedUrl"; 3259 /** XML attribute for mcc */ 3260 private static final String ATTR_MCC = "mcc"; 3261 /** XML attribute for mnc */ 3262 private static final String ATTR_MNC = "mnc"; 3263 3264 private static final int REDIRECTED_PROVISIONING = 1; 3265 private static final int PROVISIONING = 2; 3266 3267 private String getProvisioningUrlBaseFromFile(int type) { 3268 FileReader fileReader = null; 3269 XmlPullParser parser = null; 3270 Configuration config = mContext.getResources().getConfiguration(); 3271 String tagType; 3272 3273 switch (type) { 3274 case PROVISIONING: 3275 tagType = TAG_PROVISIONING_URL; 3276 break; 3277 case REDIRECTED_PROVISIONING: 3278 tagType = TAG_REDIRECTED_URL; 3279 break; 3280 default: 3281 throw new RuntimeException("getProvisioningUrlBaseFromFile: Unexpected parameter " + 3282 type); 3283 } 3284 3285 try { 3286 fileReader = new FileReader(mProvisioningUrlFile); 3287 parser = Xml.newPullParser(); 3288 parser.setInput(fileReader); 3289 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3290 3291 while (true) { 3292 XmlUtils.nextElement(parser); 3293 3294 String element = parser.getName(); 3295 if (element == null) break; 3296 3297 if (element.equals(tagType)) { 3298 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3299 try { 3300 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3301 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3302 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3303 parser.next(); 3304 if (parser.getEventType() == XmlPullParser.TEXT) { 3305 return parser.getText(); 3306 } 3307 } 3308 } 3309 } catch (NumberFormatException e) { 3310 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3311 } 3312 } 3313 } 3314 return null; 3315 } catch (FileNotFoundException e) { 3316 loge("Carrier Provisioning Urls file not found"); 3317 } catch (XmlPullParserException e) { 3318 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3319 } catch (IOException e) { 3320 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3321 } finally { 3322 if (fileReader != null) { 3323 try { 3324 fileReader.close(); 3325 } catch (IOException e) {} 3326 } 3327 } 3328 return null; 3329 } 3330 3331 @Override 3332 public String getMobileRedirectedProvisioningUrl() { 3333 enforceConnectivityInternalPermission(); 3334 String url = getProvisioningUrlBaseFromFile(REDIRECTED_PROVISIONING); 3335 if (TextUtils.isEmpty(url)) { 3336 url = mContext.getResources().getString(R.string.mobile_redirected_provisioning_url); 3337 } 3338 return url; 3339 } 3340 3341 @Override 3342 public String getMobileProvisioningUrl() { 3343 enforceConnectivityInternalPermission(); 3344 String url = getProvisioningUrlBaseFromFile(PROVISIONING); 3345 if (TextUtils.isEmpty(url)) { 3346 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3347 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3348 } else { 3349 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3350 } 3351 // populate the iccid, imei and phone number in the provisioning url. 3352 if (!TextUtils.isEmpty(url)) { 3353 String phoneNumber = mTelephonyManager.getLine1Number(); 3354 if (TextUtils.isEmpty(phoneNumber)) { 3355 phoneNumber = "0000000000"; 3356 } 3357 url = String.format(url, 3358 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3359 mTelephonyManager.getDeviceId() /* IMEI */, 3360 phoneNumber /* Phone numer */); 3361 } 3362 3363 return url; 3364 } 3365 3366 @Override 3367 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3368 String action) { 3369 enforceConnectivityInternalPermission(); 3370 final long ident = Binder.clearCallingIdentity(); 3371 try { 3372 setProvNotificationVisible(visible, networkType, action); 3373 } finally { 3374 Binder.restoreCallingIdentity(ident); 3375 } 3376 } 3377 3378 @Override 3379 public void setAirplaneMode(boolean enable) { 3380 enforceConnectivityInternalPermission(); 3381 final long ident = Binder.clearCallingIdentity(); 3382 try { 3383 final ContentResolver cr = mContext.getContentResolver(); 3384 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3385 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3386 intent.putExtra("state", enable); 3387 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3388 } finally { 3389 Binder.restoreCallingIdentity(ident); 3390 } 3391 } 3392 3393 private void onUserStart(int userId) { 3394 synchronized(mVpns) { 3395 Vpn userVpn = mVpns.get(userId); 3396 if (userVpn != null) { 3397 loge("Starting user already has a VPN"); 3398 return; 3399 } 3400 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3401 mVpns.put(userId, userVpn); 3402 } 3403 } 3404 3405 private void onUserStop(int userId) { 3406 synchronized(mVpns) { 3407 Vpn userVpn = mVpns.get(userId); 3408 if (userVpn == null) { 3409 loge("Stopping user has no VPN"); 3410 return; 3411 } 3412 mVpns.delete(userId); 3413 } 3414 } 3415 3416 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3417 @Override 3418 public void onReceive(Context context, Intent intent) { 3419 final String action = intent.getAction(); 3420 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3421 if (userId == UserHandle.USER_NULL) return; 3422 3423 if (Intent.ACTION_USER_STARTING.equals(action)) { 3424 onUserStart(userId); 3425 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3426 onUserStop(userId); 3427 } 3428 } 3429 }; 3430 3431 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3432 new HashMap<Messenger, NetworkFactoryInfo>(); 3433 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3434 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3435 3436 private static class NetworkFactoryInfo { 3437 public final String name; 3438 public final Messenger messenger; 3439 public final AsyncChannel asyncChannel; 3440 3441 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3442 this.name = name; 3443 this.messenger = messenger; 3444 this.asyncChannel = asyncChannel; 3445 } 3446 } 3447 3448 /** 3449 * Tracks info about the requester. 3450 * Also used to notice when the calling process dies so we can self-expire 3451 */ 3452 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3453 static final boolean REQUEST = true; 3454 static final boolean LISTEN = false; 3455 3456 final NetworkRequest request; 3457 final PendingIntent mPendingIntent; 3458 boolean mPendingIntentSent; 3459 private final IBinder mBinder; 3460 final int mPid; 3461 final int mUid; 3462 final Messenger messenger; 3463 final boolean isRequest; 3464 3465 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, boolean isRequest) { 3466 request = r; 3467 mPendingIntent = pi; 3468 messenger = null; 3469 mBinder = null; 3470 mPid = getCallingPid(); 3471 mUid = getCallingUid(); 3472 this.isRequest = isRequest; 3473 } 3474 3475 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, boolean isRequest) { 3476 super(); 3477 messenger = m; 3478 request = r; 3479 mBinder = binder; 3480 mPid = getCallingPid(); 3481 mUid = getCallingUid(); 3482 this.isRequest = isRequest; 3483 mPendingIntent = null; 3484 3485 try { 3486 mBinder.linkToDeath(this, 0); 3487 } catch (RemoteException e) { 3488 binderDied(); 3489 } 3490 } 3491 3492 void unlinkDeathRecipient() { 3493 if (mBinder != null) { 3494 mBinder.unlinkToDeath(this, 0); 3495 } 3496 } 3497 3498 public void binderDied() { 3499 log("ConnectivityService NetworkRequestInfo binderDied(" + 3500 request + ", " + mBinder + ")"); 3501 releaseNetworkRequest(request); 3502 } 3503 3504 public String toString() { 3505 return (isRequest ? "Request" : "Listen") + " from uid/pid:" + mUid + "/" + 3506 mPid + " for " + request + 3507 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3508 } 3509 } 3510 3511 @Override 3512 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3513 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3514 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3515 enforceNetworkRequestPermissions(networkCapabilities); 3516 enforceMeteredApnPolicy(networkCapabilities); 3517 3518 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3519 throw new IllegalArgumentException("Bad timeout specified"); 3520 } 3521 3522 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3523 nextNetworkRequestId()); 3524 if (DBG) log("requestNetwork for " + networkRequest); 3525 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3526 NetworkRequestInfo.REQUEST); 3527 3528 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3529 if (timeoutMs > 0) { 3530 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3531 nri), timeoutMs); 3532 } 3533 return networkRequest; 3534 } 3535 3536 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3537 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) 3538 == false) { 3539 enforceConnectivityInternalPermission(); 3540 } else { 3541 enforceChangePermission(); 3542 } 3543 } 3544 3545 @Override 3546 public boolean requestBandwidthUpdate(Network network) { 3547 enforceAccessPermission(); 3548 NetworkAgentInfo nai = null; 3549 if (network == null) { 3550 return false; 3551 } 3552 synchronized (mNetworkForNetId) { 3553 nai = mNetworkForNetId.get(network.netId); 3554 } 3555 if (nai != null) { 3556 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3557 return true; 3558 } 3559 return false; 3560 } 3561 3562 3563 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3564 // if UID is restricted, don't allow them to bring up metered APNs 3565 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) 3566 == false) { 3567 final int uidRules; 3568 final int uid = Binder.getCallingUid(); 3569 synchronized(mRulesLock) { 3570 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3571 } 3572 if ((uidRules & (RULE_REJECT_METERED | RULE_REJECT_ALL)) != 0) { 3573 // we could silently fail or we can filter the available nets to only give 3574 // them those they have access to. Chose the more useful 3575 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 3576 } 3577 } 3578 } 3579 3580 @Override 3581 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3582 PendingIntent operation) { 3583 checkNotNull(operation, "PendingIntent cannot be null."); 3584 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3585 enforceNetworkRequestPermissions(networkCapabilities); 3586 enforceMeteredApnPolicy(networkCapabilities); 3587 3588 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3589 nextNetworkRequestId()); 3590 if (DBG) log("pendingRequest for " + networkRequest + " to trigger " + operation); 3591 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3592 NetworkRequestInfo.REQUEST); 3593 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3594 nri)); 3595 return networkRequest; 3596 } 3597 3598 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3599 mHandler.sendMessageDelayed( 3600 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3601 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3602 } 3603 3604 @Override 3605 public void releasePendingNetworkRequest(PendingIntent operation) { 3606 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3607 getCallingUid(), 0, operation)); 3608 } 3609 3610 // In order to implement the compatibility measure for pre-M apps that call 3611 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 3612 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 3613 // This ensures it has permission to do so. 3614 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 3615 if (nc == null) { 3616 return false; 3617 } 3618 int[] transportTypes = nc.getTransportTypes(); 3619 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 3620 return false; 3621 } 3622 try { 3623 mContext.enforceCallingOrSelfPermission( 3624 android.Manifest.permission.ACCESS_WIFI_STATE, 3625 "ConnectivityService"); 3626 } catch (SecurityException e) { 3627 return false; 3628 } 3629 return true; 3630 } 3631 3632 @Override 3633 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 3634 Messenger messenger, IBinder binder) { 3635 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3636 enforceAccessPermission(); 3637 } 3638 3639 NetworkRequest networkRequest = new NetworkRequest(new NetworkCapabilities( 3640 networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3641 if (DBG) log("listenForNetwork for " + networkRequest); 3642 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3643 NetworkRequestInfo.LISTEN); 3644 3645 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3646 return networkRequest; 3647 } 3648 3649 @Override 3650 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 3651 PendingIntent operation) { 3652 } 3653 3654 @Override 3655 public void releaseNetworkRequest(NetworkRequest networkRequest) { 3656 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 3657 0, networkRequest)); 3658 } 3659 3660 @Override 3661 public void registerNetworkFactory(Messenger messenger, String name) { 3662 enforceConnectivityInternalPermission(); 3663 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 3664 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 3665 } 3666 3667 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 3668 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 3669 mNetworkFactoryInfos.put(nfi.messenger, nfi); 3670 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 3671 } 3672 3673 @Override 3674 public void unregisterNetworkFactory(Messenger messenger) { 3675 enforceConnectivityInternalPermission(); 3676 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 3677 } 3678 3679 private void handleUnregisterNetworkFactory(Messenger messenger) { 3680 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 3681 if (nfi == null) { 3682 loge("Failed to find Messenger in unregisterNetworkFactory"); 3683 return; 3684 } 3685 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 3686 } 3687 3688 /** 3689 * NetworkAgentInfo supporting a request by requestId. 3690 * These have already been vetted (their Capabilities satisfy the request) 3691 * and the are the highest scored network available. 3692 * the are keyed off the Requests requestId. 3693 */ 3694 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 3695 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 3696 new SparseArray<NetworkAgentInfo>(); 3697 3698 // NOTE: Accessed on multiple threads, must be synchronized on itself. 3699 @GuardedBy("mNetworkForNetId") 3700 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 3701 new SparseArray<NetworkAgentInfo>(); 3702 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 3703 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 3704 // there may not be a strict 1:1 correlation between the two. 3705 @GuardedBy("mNetworkForNetId") 3706 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 3707 3708 // NetworkAgentInfo keyed off its connecting messenger 3709 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 3710 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 3711 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 3712 new HashMap<Messenger, NetworkAgentInfo>(); 3713 3714 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 3715 private final NetworkRequest mDefaultRequest; 3716 3717 // Request used to optionally keep mobile data active even when higher 3718 // priority networks like Wi-Fi are active. 3719 private final NetworkRequest mDefaultMobileDataRequest; 3720 3721 private NetworkAgentInfo getDefaultNetwork() { 3722 return mNetworkForRequestId.get(mDefaultRequest.requestId); 3723 } 3724 3725 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 3726 return nai == getDefaultNetwork(); 3727 } 3728 3729 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 3730 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 3731 int currentScore, NetworkMisc networkMisc) { 3732 enforceConnectivityInternalPermission(); 3733 3734 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 3735 // satisfies mDefaultRequest. 3736 NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 3737 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 3738 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 3739 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest); 3740 synchronized (this) { 3741 nai.networkMonitor.systemReady = mSystemReady; 3742 } 3743 if (DBG) log("registerNetworkAgent " + nai); 3744 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 3745 return nai.network.netId; 3746 } 3747 3748 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 3749 if (VDBG) log("Got NetworkAgent Messenger"); 3750 mNetworkAgentInfos.put(na.messenger, na); 3751 synchronized (mNetworkForNetId) { 3752 mNetworkForNetId.put(na.network.netId, na); 3753 } 3754 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 3755 NetworkInfo networkInfo = na.networkInfo; 3756 na.networkInfo = null; 3757 updateNetworkInfo(na, networkInfo); 3758 } 3759 3760 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 3761 LinkProperties newLp = networkAgent.linkProperties; 3762 int netId = networkAgent.network.netId; 3763 3764 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 3765 // we do anything else, make sure its LinkProperties are accurate. 3766 if (networkAgent.clatd != null) { 3767 networkAgent.clatd.fixupLinkProperties(oldLp); 3768 } 3769 3770 updateInterfaces(newLp, oldLp, netId); 3771 updateMtu(newLp, oldLp); 3772 // TODO - figure out what to do for clat 3773// for (LinkProperties lp : newLp.getStackedLinks()) { 3774// updateMtu(lp, null); 3775// } 3776 updateTcpBufferSizes(networkAgent); 3777 3778 // TODO: deprecate and remove mDefaultDns when we can do so safely. 3779 // For now, use it only when the network has Internet access. http://b/18327075 3780 final boolean useDefaultDns = networkAgent.networkCapabilities.hasCapability( 3781 NET_CAPABILITY_INTERNET); 3782 final boolean flushDns = updateRoutes(newLp, oldLp, netId); 3783 updateDnses(newLp, oldLp, netId, flushDns, useDefaultDns); 3784 3785 updateClat(newLp, oldLp, networkAgent); 3786 if (isDefaultNetwork(networkAgent)) { 3787 handleApplyDefaultProxy(newLp.getHttpProxy()); 3788 } else { 3789 updateProxy(newLp, oldLp, networkAgent); 3790 } 3791 // TODO - move this check to cover the whole function 3792 if (!Objects.equals(newLp, oldLp)) { 3793 notifyIfacesChanged(); 3794 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 3795 } 3796 } 3797 3798 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3799 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 3800 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 3801 3802 if (!wasRunningClat && shouldRunClat) { 3803 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 3804 nai.clatd.start(); 3805 } else if (wasRunningClat && !shouldRunClat) { 3806 nai.clatd.stop(); 3807 } 3808 } 3809 3810 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 3811 CompareResult<String> interfaceDiff = new CompareResult<String>(); 3812 if (oldLp != null) { 3813 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 3814 } else if (newLp != null) { 3815 interfaceDiff.added = newLp.getAllInterfaceNames(); 3816 } 3817 for (String iface : interfaceDiff.added) { 3818 try { 3819 if (DBG) log("Adding iface " + iface + " to network " + netId); 3820 mNetd.addInterfaceToNetwork(iface, netId); 3821 } catch (Exception e) { 3822 loge("Exception adding interface: " + e); 3823 } 3824 } 3825 for (String iface : interfaceDiff.removed) { 3826 try { 3827 if (DBG) log("Removing iface " + iface + " from network " + netId); 3828 mNetd.removeInterfaceFromNetwork(iface, netId); 3829 } catch (Exception e) { 3830 loge("Exception removing interface: " + e); 3831 } 3832 } 3833 } 3834 3835 /** 3836 * Have netd update routes from oldLp to newLp. 3837 * @return true if routes changed between oldLp and newLp 3838 */ 3839 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 3840 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 3841 if (oldLp != null) { 3842 routeDiff = oldLp.compareAllRoutes(newLp); 3843 } else if (newLp != null) { 3844 routeDiff.added = newLp.getAllRoutes(); 3845 } 3846 3847 // add routes before removing old in case it helps with continuous connectivity 3848 3849 // do this twice, adding non-nexthop routes first, then routes they are dependent on 3850 for (RouteInfo route : routeDiff.added) { 3851 if (route.hasGateway()) continue; 3852 if (DBG) log("Adding Route [" + route + "] to network " + netId); 3853 try { 3854 mNetd.addRoute(netId, route); 3855 } catch (Exception e) { 3856 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 3857 loge("Exception in addRoute for non-gateway: " + e); 3858 } 3859 } 3860 } 3861 for (RouteInfo route : routeDiff.added) { 3862 if (route.hasGateway() == false) continue; 3863 if (DBG) log("Adding Route [" + route + "] to network " + netId); 3864 try { 3865 mNetd.addRoute(netId, route); 3866 } catch (Exception e) { 3867 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 3868 loge("Exception in addRoute for gateway: " + e); 3869 } 3870 } 3871 } 3872 3873 for (RouteInfo route : routeDiff.removed) { 3874 if (DBG) log("Removing Route [" + route + "] from network " + netId); 3875 try { 3876 mNetd.removeRoute(netId, route); 3877 } catch (Exception e) { 3878 loge("Exception in removeRoute: " + e); 3879 } 3880 } 3881 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 3882 } 3883 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId, 3884 boolean flush, boolean useDefaultDns) { 3885 if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) { 3886 Collection<InetAddress> dnses = newLp.getDnsServers(); 3887 if (dnses.size() == 0 && mDefaultDns != null && useDefaultDns) { 3888 dnses = new ArrayList(); 3889 dnses.add(mDefaultDns); 3890 if (DBG) { 3891 loge("no dns provided for netId " + netId + ", so using defaults"); 3892 } 3893 } 3894 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 3895 try { 3896 mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses), 3897 newLp.getDomains()); 3898 } catch (Exception e) { 3899 loge("Exception in setDnsServersForNetwork: " + e); 3900 } 3901 NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId); 3902 if (defaultNai != null && defaultNai.network.netId == netId) { 3903 setDefaultDnsSystemProperties(dnses); 3904 } 3905 flushVmDnsCache(); 3906 } else if (flush) { 3907 try { 3908 mNetd.flushNetworkDnsCache(netId); 3909 } catch (Exception e) { 3910 loge("Exception in flushNetworkDnsCache: " + e); 3911 } 3912 flushVmDnsCache(); 3913 } 3914 } 3915 3916 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 3917 int last = 0; 3918 for (InetAddress dns : dnses) { 3919 ++last; 3920 String key = "net.dns" + last; 3921 String value = dns.getHostAddress(); 3922 SystemProperties.set(key, value); 3923 } 3924 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 3925 String key = "net.dns" + i; 3926 SystemProperties.set(key, ""); 3927 } 3928 mNumDnsEntries = last; 3929 } 3930 3931 private void updateCapabilities(NetworkAgentInfo networkAgent, 3932 NetworkCapabilities networkCapabilities) { 3933 if (!Objects.equals(networkAgent.networkCapabilities, networkCapabilities)) { 3934 synchronized (networkAgent) { 3935 networkAgent.networkCapabilities = networkCapabilities; 3936 } 3937 rematchAllNetworksAndRequests(networkAgent, networkAgent.getCurrentScore()); 3938 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_CAP_CHANGED); 3939 } 3940 } 3941 3942 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 3943 for (int i = 0; i < nai.networkRequests.size(); i++) { 3944 NetworkRequest nr = nai.networkRequests.valueAt(i); 3945 // Don't send listening requests to factories. b/17393458 3946 if (!isRequest(nr)) continue; 3947 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 3948 } 3949 } 3950 3951 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 3952 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 3953 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 3954 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 3955 networkRequest); 3956 } 3957 } 3958 3959 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 3960 int notificationType) { 3961 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 3962 Intent intent = new Intent(); 3963 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 3964 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 3965 nri.mPendingIntentSent = true; 3966 sendIntent(nri.mPendingIntent, intent); 3967 } 3968 // else not handled 3969 } 3970 3971 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 3972 mPendingIntentWakeLock.acquire(); 3973 try { 3974 if (DBG) log("Sending " + pendingIntent); 3975 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 3976 } catch (PendingIntent.CanceledException e) { 3977 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 3978 mPendingIntentWakeLock.release(); 3979 releasePendingNetworkRequest(pendingIntent); 3980 } 3981 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 3982 } 3983 3984 @Override 3985 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 3986 String resultData, Bundle resultExtras) { 3987 if (DBG) log("Finished sending " + pendingIntent); 3988 mPendingIntentWakeLock.release(); 3989 // Release with a delay so the receiving client has an opportunity to put in its 3990 // own request. 3991 releasePendingNetworkRequestWithDelay(pendingIntent); 3992 } 3993 3994 private void callCallbackForRequest(NetworkRequestInfo nri, 3995 NetworkAgentInfo networkAgent, int notificationType) { 3996 if (nri.messenger == null) return; // Default request has no msgr 3997 Bundle bundle = new Bundle(); 3998 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 3999 new NetworkRequest(nri.request)); 4000 Message msg = Message.obtain(); 4001 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4002 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4003 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4004 } 4005 switch (notificationType) { 4006 case ConnectivityManager.CALLBACK_LOSING: { 4007 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4008 break; 4009 } 4010 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4011 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4012 new NetworkCapabilities(networkAgent.networkCapabilities)); 4013 break; 4014 } 4015 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4016 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4017 new LinkProperties(networkAgent.linkProperties)); 4018 break; 4019 } 4020 } 4021 msg.what = notificationType; 4022 msg.setData(bundle); 4023 try { 4024 if (VDBG) { 4025 log("sending notification " + notifyTypeToName(notificationType) + 4026 " for " + nri.request); 4027 } 4028 nri.messenger.send(msg); 4029 } catch (RemoteException e) { 4030 // may occur naturally in the race of binder death. 4031 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4032 } 4033 } 4034 4035 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4036 for (int i = 0; i < nai.networkRequests.size(); i++) { 4037 NetworkRequest nr = nai.networkRequests.valueAt(i); 4038 // Ignore listening requests. 4039 if (!isRequest(nr)) continue; 4040 loge("Dead network still had at least " + nr); 4041 break; 4042 } 4043 nai.asyncChannel.disconnect(); 4044 } 4045 4046 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4047 if (oldNetwork == null) { 4048 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4049 return; 4050 } 4051 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4052 teardownUnneededNetwork(oldNetwork); 4053 } 4054 4055 private void makeDefault(NetworkAgentInfo newNetwork) { 4056 if (DBG) log("Switching to new default network: " + newNetwork); 4057 setupDataActivityTracking(newNetwork); 4058 try { 4059 mNetd.setDefaultNetId(newNetwork.network.netId); 4060 } catch (Exception e) { 4061 loge("Exception setting default network :" + e); 4062 } 4063 notifyLockdownVpn(newNetwork); 4064 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4065 updateTcpBufferSizes(newNetwork); 4066 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4067 } 4068 4069 // Handles a network appearing or improving its score. 4070 // 4071 // - Evaluates all current NetworkRequests that can be 4072 // satisfied by newNetwork, and reassigns to newNetwork 4073 // any such requests for which newNetwork is the best. 4074 // 4075 // - Lingers any validated Networks that as a result are no longer 4076 // needed. A network is needed if it is the best network for 4077 // one or more NetworkRequests, or if it is a VPN. 4078 // 4079 // - Tears down newNetwork if it just became validated 4080 // (i.e. nascent==JUST_VALIDATED) but turns out to be unneeded. 4081 // 4082 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4083 // networks that have no chance (i.e. even if validated) 4084 // of becoming the highest scoring network. 4085 // 4086 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4087 // it does not remove NetworkRequests that other Networks could better satisfy. 4088 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4089 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4090 // as it performs better by a factor of the number of Networks. 4091 // 4092 // @param newNetwork is the network to be matched against NetworkRequests. 4093 // @param nascent indicates if newNetwork just became validated, in which case it should be 4094 // torn down if unneeded. 4095 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4096 // performed to tear down unvalidated networks that have no chance (i.e. even if 4097 // validated) of becoming the highest scoring network. 4098 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, NascentState nascent, 4099 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4100 if (!newNetwork.created) return; 4101 if (nascent == NascentState.JUST_VALIDATED && !newNetwork.everValidated) { 4102 loge("ERROR: nascent network not validated."); 4103 } 4104 boolean keep = newNetwork.isVPN(); 4105 boolean isNewDefault = false; 4106 NetworkAgentInfo oldDefaultNetwork = null; 4107 if (DBG) log("rematching " + newNetwork.name()); 4108 // Find and migrate to this Network any NetworkRequests for 4109 // which this network is now the best. 4110 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4111 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4112 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4113 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4114 if (newNetwork == currentNetwork) { 4115 if (DBG) { 4116 log("Network " + newNetwork.name() + " was already satisfying" + 4117 " request " + nri.request.requestId + ". No change."); 4118 } 4119 keep = true; 4120 continue; 4121 } 4122 4123 // check if it satisfies the NetworkCapabilities 4124 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4125 if (newNetwork.satisfies(nri.request)) { 4126 if (!nri.isRequest) { 4127 // This is not a request, it's a callback listener. 4128 // Add it to newNetwork regardless of score. 4129 newNetwork.addRequest(nri.request); 4130 continue; 4131 } 4132 4133 // next check if it's better than any current network we're using for 4134 // this request 4135 if (VDBG) { 4136 log("currentScore = " + 4137 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4138 ", newScore = " + newNetwork.getCurrentScore()); 4139 } 4140 if (currentNetwork == null || 4141 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4142 if (currentNetwork != null) { 4143 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4144 currentNetwork.networkRequests.remove(nri.request.requestId); 4145 currentNetwork.networkLingered.add(nri.request); 4146 affectedNetworks.add(currentNetwork); 4147 } else { 4148 if (DBG) log(" accepting network in place of null"); 4149 } 4150 unlinger(newNetwork); 4151 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4152 newNetwork.addRequest(nri.request); 4153 keep = true; 4154 // Tell NetworkFactories about the new score, so they can stop 4155 // trying to connect if they know they cannot match it. 4156 // TODO - this could get expensive if we have alot of requests for this 4157 // network. Think about if there is a way to reduce this. Push 4158 // netid->request mapping to each factory? 4159 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4160 if (mDefaultRequest.requestId == nri.request.requestId) { 4161 isNewDefault = true; 4162 oldDefaultNetwork = currentNetwork; 4163 } 4164 } 4165 } 4166 } 4167 // Linger any networks that are no longer needed. 4168 for (NetworkAgentInfo nai : affectedNetworks) { 4169 if (nai.everValidated && unneeded(nai)) { 4170 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 4171 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 4172 } else { 4173 unlinger(nai); 4174 } 4175 } 4176 if (keep) { 4177 if (isNewDefault) { 4178 // Notify system services that this network is up. 4179 makeDefault(newNetwork); 4180 synchronized (ConnectivityService.this) { 4181 // have a new default network, release the transition wakelock in 4182 // a second if it's held. The second pause is to allow apps 4183 // to reconnect over the new network 4184 if (mNetTransitionWakeLock.isHeld()) { 4185 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4186 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4187 mNetTransitionWakeLockSerialNumber, 0), 4188 1000); 4189 } 4190 } 4191 } 4192 4193 // do this after the default net is switched, but 4194 // before LegacyTypeTracker sends legacy broadcasts 4195 notifyNetworkCallbacks(newNetwork, ConnectivityManager.CALLBACK_AVAILABLE); 4196 4197 if (isNewDefault) { 4198 // Maintain the illusion: since the legacy API only 4199 // understands one network at a time, we must pretend 4200 // that the current default network disconnected before 4201 // the new one connected. 4202 if (oldDefaultNetwork != null) { 4203 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4204 oldDefaultNetwork, true); 4205 } 4206 mDefaultInetConditionPublished = newNetwork.everValidated ? 100 : 0; 4207 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4208 notifyLockdownVpn(newNetwork); 4209 } 4210 4211 // Notify battery stats service about this network, both the normal 4212 // interface and any stacked links. 4213 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4214 try { 4215 final IBatteryStats bs = BatteryStatsService.getService(); 4216 final int type = newNetwork.networkInfo.getType(); 4217 4218 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4219 bs.noteNetworkInterfaceType(baseIface, type); 4220 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4221 final String stackedIface = stacked.getInterfaceName(); 4222 bs.noteNetworkInterfaceType(stackedIface, type); 4223 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4224 } 4225 } catch (RemoteException ignored) { 4226 } 4227 4228 // This has to happen after the notifyNetworkCallbacks as that tickles each 4229 // ConnectivityManager instance so that legacy requests correctly bind dns 4230 // requests to this network. The legacy users are listening for this bcast 4231 // and will generally do a dns request so they can ensureRouteToHost and if 4232 // they do that before the callbacks happen they'll use the default network. 4233 // 4234 // TODO: Is there still a race here? We send the broadcast 4235 // after sending the callback, but if the app can receive the 4236 // broadcast before the callback, it might still break. 4237 // 4238 // This *does* introduce a race where if the user uses the new api 4239 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4240 // they may get old info. Reverse this after the old startUsing api is removed. 4241 // This is on top of the multiple intent sequencing referenced in the todo above. 4242 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4243 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4244 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4245 // legacy type tracker filters out repeat adds 4246 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4247 } 4248 } 4249 4250 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4251 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4252 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4253 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4254 if (newNetwork.isVPN()) { 4255 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4256 } 4257 } else if (nascent == NascentState.JUST_VALIDATED) { 4258 // Only tear down newly validated networks here. Leave unvalidated to either become 4259 // validated (and get evaluated against peers, one losing here), or get reaped (see 4260 // reapUnvalidatedNetworks) if they have no chance of becoming the highest scoring 4261 // network. Networks that have been up for a while and are validated should be torn 4262 // down via the lingering process so communication on that network is given time to 4263 // wrap up. 4264 if (DBG) log("Validated network turns out to be unwanted. Tear it down."); 4265 teardownUnneededNetwork(newNetwork); 4266 } 4267 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4268 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4269 if (!nai.everValidated && unneeded(nai)) { 4270 if (DBG) log("Reaping " + nai.name()); 4271 teardownUnneededNetwork(nai); 4272 } 4273 } 4274 } 4275 } 4276 4277 // Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4278 // being disconnected. 4279 // If only one Network's score or capabilities have been modified since the last time 4280 // this function was called, pass this Network in via the "changed" arugment, otherwise 4281 // pass null. 4282 // If only one Network has been changed but its NetworkCapabilities have not changed, 4283 // pass in the Network's score (from getCurrentScore()) prior to the change via 4284 // "oldScore", otherwise pass changed.getCurrentScore() or 0 if "changed" is null. 4285 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4286 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4287 // to avoid the slowness. It is not simply enough to process just "changed", for 4288 // example in the case where "changed"'s score decreases and another network should begin 4289 // satifying a NetworkRequest that "changed" currently satisfies. 4290 4291 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4292 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4293 // rematchNetworkAndRequests() handles. 4294 if (changed != null && oldScore < changed.getCurrentScore()) { 4295 rematchNetworkAndRequests(changed, NascentState.NOT_JUST_VALIDATED, 4296 ReapUnvalidatedNetworks.REAP); 4297 } else { 4298 for (Iterator i = mNetworkAgentInfos.values().iterator(); i.hasNext(); ) { 4299 rematchNetworkAndRequests((NetworkAgentInfo)i.next(), 4300 NascentState.NOT_JUST_VALIDATED, 4301 // Only reap the last time through the loop. Reaping before all rematching 4302 // is complete could incorrectly teardown a network that hasn't yet been 4303 // rematched. 4304 i.hasNext() ? ReapUnvalidatedNetworks.DONT_REAP 4305 : ReapUnvalidatedNetworks.REAP); 4306 } 4307 } 4308 } 4309 4310 private void updateInetCondition(NetworkAgentInfo nai) { 4311 // Don't bother updating until we've graduated to validated at least once. 4312 if (!nai.everValidated) return; 4313 // For now only update icons for default connection. 4314 // TODO: Update WiFi and cellular icons separately. b/17237507 4315 if (!isDefaultNetwork(nai)) return; 4316 4317 int newInetCondition = nai.lastValidated ? 100 : 0; 4318 // Don't repeat publish. 4319 if (newInetCondition == mDefaultInetConditionPublished) return; 4320 4321 mDefaultInetConditionPublished = newInetCondition; 4322 sendInetConditionBroadcast(nai.networkInfo); 4323 } 4324 4325 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4326 if (mLockdownTracker != null) { 4327 if (nai != null && nai.isVPN()) { 4328 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4329 } else { 4330 mLockdownTracker.onNetworkInfoChanged(); 4331 } 4332 } 4333 } 4334 4335 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4336 NetworkInfo.State state = newInfo.getState(); 4337 NetworkInfo oldInfo = null; 4338 synchronized (networkAgent) { 4339 oldInfo = networkAgent.networkInfo; 4340 networkAgent.networkInfo = newInfo; 4341 } 4342 notifyLockdownVpn(networkAgent); 4343 4344 if (oldInfo != null && oldInfo.getState() == state) { 4345 if (VDBG) log("ignoring duplicate network state non-change"); 4346 return; 4347 } 4348 if (DBG) { 4349 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4350 (oldInfo == null ? "null" : oldInfo.getState()) + 4351 " to " + state); 4352 } 4353 4354 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4355 try { 4356 // This should never fail. Specifying an already in use NetID will cause failure. 4357 if (networkAgent.isVPN()) { 4358 mNetd.createVirtualNetwork(networkAgent.network.netId, 4359 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4360 (networkAgent.networkMisc == null || 4361 !networkAgent.networkMisc.allowBypass)); 4362 } else { 4363 mNetd.createPhysicalNetwork(networkAgent.network.netId); 4364 } 4365 } catch (Exception e) { 4366 loge("Error creating network " + networkAgent.network.netId + ": " 4367 + e.getMessage()); 4368 return; 4369 } 4370 networkAgent.created = true; 4371 updateLinkProperties(networkAgent, null); 4372 notifyIfacesChanged(); 4373 4374 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4375 scheduleUnvalidatedPrompt(networkAgent); 4376 4377 if (networkAgent.isVPN()) { 4378 // Temporarily disable the default proxy (not global). 4379 synchronized (mProxyLock) { 4380 if (!mDefaultProxyDisabled) { 4381 mDefaultProxyDisabled = true; 4382 if (mGlobalProxy == null && mDefaultProxy != null) { 4383 sendProxyBroadcast(null); 4384 } 4385 } 4386 } 4387 // TODO: support proxy per network. 4388 } 4389 4390 // Consider network even though it is not yet validated. 4391 rematchNetworkAndRequests(networkAgent, NascentState.NOT_JUST_VALIDATED, 4392 ReapUnvalidatedNetworks.REAP); 4393 4394 // This has to happen after matching the requests, because callbacks are just requests. 4395 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4396 } else if (state == NetworkInfo.State.DISCONNECTED || 4397 state == NetworkInfo.State.SUSPENDED) { 4398 networkAgent.asyncChannel.disconnect(); 4399 if (networkAgent.isVPN()) { 4400 synchronized (mProxyLock) { 4401 if (mDefaultProxyDisabled) { 4402 mDefaultProxyDisabled = false; 4403 if (mGlobalProxy == null && mDefaultProxy != null) { 4404 sendProxyBroadcast(mDefaultProxy); 4405 } 4406 } 4407 } 4408 } 4409 } 4410 } 4411 4412 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4413 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4414 if (score < 0) { 4415 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4416 "). Bumping score to min of 0"); 4417 score = 0; 4418 } 4419 4420 final int oldScore = nai.getCurrentScore(); 4421 nai.setCurrentScore(score); 4422 4423 rematchAllNetworksAndRequests(nai, oldScore); 4424 4425 sendUpdatedScoreToFactories(nai); 4426 } 4427 4428 // notify only this one new request of the current state 4429 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4430 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4431 // TODO - read state from monitor to decide what to send. 4432// if (nai.networkMonitor.isLingering()) { 4433// notifyType = NetworkCallbacks.LOSING; 4434// } else if (nai.networkMonitor.isEvaluating()) { 4435// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4436// } 4437 if (nri.mPendingIntent == null) { 4438 callCallbackForRequest(nri, nai, notifyType); 4439 } else { 4440 sendPendingIntentForRequest(nri, nai, notifyType); 4441 } 4442 } 4443 4444 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, boolean connected, int type) { 4445 // The NetworkInfo we actually send out has no bearing on the real 4446 // state of affairs. For example, if the default connection is mobile, 4447 // and a request for HIPRI has just gone away, we need to pretend that 4448 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4449 // the state to DISCONNECTED, even though the network is of type MOBILE 4450 // and is still connected. 4451 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4452 info.setType(type); 4453 if (connected) { 4454 info.setDetailedState(DetailedState.CONNECTED, null, info.getExtraInfo()); 4455 sendConnectedBroadcast(info); 4456 } else { 4457 info.setDetailedState(DetailedState.DISCONNECTED, null, info.getExtraInfo()); 4458 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4459 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4460 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4461 if (info.isFailover()) { 4462 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4463 nai.networkInfo.setFailover(false); 4464 } 4465 if (info.getReason() != null) { 4466 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4467 } 4468 if (info.getExtraInfo() != null) { 4469 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4470 } 4471 NetworkAgentInfo newDefaultAgent = null; 4472 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4473 newDefaultAgent = mNetworkForRequestId.get(mDefaultRequest.requestId); 4474 if (newDefaultAgent != null) { 4475 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4476 newDefaultAgent.networkInfo); 4477 } else { 4478 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4479 } 4480 } 4481 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4482 mDefaultInetConditionPublished); 4483 sendStickyBroadcast(intent); 4484 if (newDefaultAgent != null) { 4485 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4486 } 4487 } 4488 } 4489 4490 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4491 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4492 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4493 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4494 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4495 if (VDBG) log(" sending notification for " + nr); 4496 if (nri.mPendingIntent == null) { 4497 callCallbackForRequest(nri, networkAgent, notifyType); 4498 } else { 4499 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4500 } 4501 } 4502 } 4503 4504 private String notifyTypeToName(int notifyType) { 4505 switch (notifyType) { 4506 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4507 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4508 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4509 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4510 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4511 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4512 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4513 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4514 } 4515 return "UNKNOWN"; 4516 } 4517 4518 /** 4519 * Notify other system services that set of active ifaces has changed. 4520 */ 4521 private void notifyIfacesChanged() { 4522 try { 4523 mStatsService.forceUpdateIfaces(); 4524 } catch (Exception ignored) { 4525 } 4526 } 4527 4528 @Override 4529 public boolean addVpnAddress(String address, int prefixLength) { 4530 throwIfLockdownEnabled(); 4531 int user = UserHandle.getUserId(Binder.getCallingUid()); 4532 synchronized (mVpns) { 4533 return mVpns.get(user).addAddress(address, prefixLength); 4534 } 4535 } 4536 4537 @Override 4538 public boolean removeVpnAddress(String address, int prefixLength) { 4539 throwIfLockdownEnabled(); 4540 int user = UserHandle.getUserId(Binder.getCallingUid()); 4541 synchronized (mVpns) { 4542 return mVpns.get(user).removeAddress(address, prefixLength); 4543 } 4544 } 4545 4546 @Override 4547 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 4548 throwIfLockdownEnabled(); 4549 int user = UserHandle.getUserId(Binder.getCallingUid()); 4550 boolean success; 4551 synchronized (mVpns) { 4552 success = mVpns.get(user).setUnderlyingNetworks(networks); 4553 } 4554 if (success) { 4555 notifyIfacesChanged(); 4556 } 4557 return success; 4558 } 4559 4560 @Override 4561 public void factoryReset() { 4562 enforceConnectivityInternalPermission(); 4563 // Turn airplane mode off 4564 setAirplaneMode(false); 4565 4566 // Untether 4567 for (String tether : getTetheredIfaces()) { 4568 untether(tether); 4569 } 4570 4571 // Turn VPN off 4572 VpnConfig vpnConfig = getVpnConfig(); 4573 if (vpnConfig != null) { 4574 if (vpnConfig.legacy) { 4575 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN); 4576 } else { 4577 // Prevent this app from initiating VPN connections in the future without 4578 // user intervention. 4579 setVpnPackageAuthorization(false); 4580 4581 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN); 4582 } 4583 } 4584 } 4585} 4586