ConnectivityService.java revision d49159f4e997faae6ef4141b667ad6fef74a6724
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.NetworkPolicyManager.RULE_ALLOW_ALL; 27import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 28import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 29 30import android.annotation.Nullable; 31import android.app.AlarmManager; 32import android.app.Notification; 33import android.app.NotificationManager; 34import android.app.PendingIntent; 35import android.content.BroadcastReceiver; 36import android.content.ContentResolver; 37import android.content.Context; 38import android.content.Intent; 39import android.content.IntentFilter; 40import android.content.pm.PackageManager; 41import android.content.res.Configuration; 42import android.content.res.Resources; 43import android.database.ContentObserver; 44import android.net.ConnectivityManager; 45import android.net.IConnectivityManager; 46import android.net.INetworkManagementEventObserver; 47import android.net.INetworkPolicyListener; 48import android.net.INetworkPolicyManager; 49import android.net.INetworkStatsService; 50import android.net.LinkProperties; 51import android.net.LinkProperties.CompareResult; 52import android.net.Network; 53import android.net.NetworkAgent; 54import android.net.NetworkCapabilities; 55import android.net.NetworkConfig; 56import android.net.NetworkInfo; 57import android.net.NetworkInfo.DetailedState; 58import android.net.NetworkMisc; 59import android.net.NetworkQuotaInfo; 60import android.net.NetworkRequest; 61import android.net.NetworkState; 62import android.net.NetworkUtils; 63import android.net.Proxy; 64import android.net.ProxyInfo; 65import android.net.RouteInfo; 66import android.net.UidRange; 67import android.net.Uri; 68import android.os.Binder; 69import android.os.Bundle; 70import android.os.FileUtils; 71import android.os.Handler; 72import android.os.HandlerThread; 73import android.os.IBinder; 74import android.os.INetworkManagementService; 75import android.os.Looper; 76import android.os.Message; 77import android.os.Messenger; 78import android.os.ParcelFileDescriptor; 79import android.os.PowerManager; 80import android.os.Process; 81import android.os.RemoteException; 82import android.os.SystemClock; 83import android.os.SystemProperties; 84import android.os.UserHandle; 85import android.os.UserManager; 86import android.provider.Settings; 87import android.security.Credentials; 88import android.security.KeyStore; 89import android.telephony.TelephonyManager; 90import android.text.TextUtils; 91import android.util.Slog; 92import android.util.SparseArray; 93import android.util.SparseBooleanArray; 94import android.util.SparseIntArray; 95import android.util.Xml; 96 97import com.android.internal.R; 98import com.android.internal.annotations.GuardedBy; 99import com.android.internal.app.IBatteryStats; 100import com.android.internal.net.LegacyVpnInfo; 101import com.android.internal.net.NetworkStatsFactory; 102import com.android.internal.net.VpnConfig; 103import com.android.internal.net.VpnInfo; 104import com.android.internal.net.VpnProfile; 105import com.android.internal.telephony.DctConstants; 106import com.android.internal.util.AsyncChannel; 107import com.android.internal.util.IndentingPrintWriter; 108import com.android.internal.util.XmlUtils; 109import com.android.server.am.BatteryStatsService; 110import com.android.server.connectivity.DataConnectionStats; 111import com.android.server.connectivity.Nat464Xlat; 112import com.android.server.connectivity.NetworkAgentInfo; 113import com.android.server.connectivity.NetworkMonitor; 114import com.android.server.connectivity.PacManager; 115import com.android.server.connectivity.PermissionMonitor; 116import com.android.server.connectivity.Tethering; 117import com.android.server.connectivity.Vpn; 118import com.android.server.net.BaseNetworkObserver; 119import com.android.server.net.LockdownVpnTracker; 120import com.google.android.collect.Lists; 121import com.google.android.collect.Sets; 122 123import org.xmlpull.v1.XmlPullParser; 124import org.xmlpull.v1.XmlPullParserException; 125 126import java.io.File; 127import java.io.FileDescriptor; 128import java.io.FileNotFoundException; 129import java.io.FileReader; 130import java.io.IOException; 131import java.io.PrintWriter; 132import java.net.Inet4Address; 133import java.net.InetAddress; 134import java.net.UnknownHostException; 135import java.util.ArrayList; 136import java.util.Arrays; 137import java.util.Collection; 138import java.util.HashMap; 139import java.util.HashSet; 140import java.util.Iterator; 141import java.util.List; 142import java.util.Map; 143import java.util.Objects; 144import java.util.concurrent.atomic.AtomicInteger; 145 146/** 147 * @hide 148 */ 149public class ConnectivityService extends IConnectivityManager.Stub 150 implements PendingIntent.OnFinished { 151 private static final String TAG = "ConnectivityService"; 152 153 private static final boolean DBG = true; 154 private static final boolean VDBG = false; 155 156 private static final boolean LOGD_RULES = false; 157 158 // TODO: create better separation between radio types and network types 159 160 // how long to wait before switching back to a radio's default network 161 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 162 // system property that can override the above value 163 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 164 "android.telephony.apn-restore"; 165 166 // How long to wait before putting up a "This network doesn't have an Internet connection, 167 // connect anyway?" dialog after the user selects a network that doesn't validate. 168 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 169 170 // How long to delay to removal of a pending intent based request. 171 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 172 private final int mReleasePendingIntentDelayMs; 173 174 private Tethering mTethering; 175 176 private final PermissionMonitor mPermissionMonitor; 177 178 private KeyStore mKeyStore; 179 180 @GuardedBy("mVpns") 181 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 182 183 private boolean mLockdownEnabled; 184 private LockdownVpnTracker mLockdownTracker; 185 186 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 187 private Object mRulesLock = new Object(); 188 /** Currently active network rules by UID. */ 189 private SparseIntArray mUidRules = new SparseIntArray(); 190 /** Set of ifaces that are costly. */ 191 private HashSet<String> mMeteredIfaces = Sets.newHashSet(); 192 193 final private Context mContext; 194 private int mNetworkPreference; 195 // 0 is full bad, 100 is full good 196 private int mDefaultInetConditionPublished = 0; 197 198 private Object mDnsLock = new Object(); 199 private int mNumDnsEntries; 200 201 private boolean mTestMode; 202 private static ConnectivityService sServiceInstance; 203 204 private INetworkManagementService mNetd; 205 private INetworkStatsService mStatsService; 206 private INetworkPolicyManager mPolicyManager; 207 208 private String mCurrentTcpBufferSizes; 209 210 private static final int ENABLED = 1; 211 private static final int DISABLED = 0; 212 213 // Arguments to rematchNetworkAndRequests() 214 private enum NascentState { 215 // Indicates a network was just validated for the first time. If the network is found to 216 // be unwanted (i.e. not satisfy any NetworkRequests) it is torn down. 217 JUST_VALIDATED, 218 // Indicates a network was not validated for the first time immediately prior to this call. 219 NOT_JUST_VALIDATED 220 }; 221 private enum ReapUnvalidatedNetworks { 222 // Tear down unvalidated networks that have no chance (i.e. even if validated) of becoming 223 // the highest scoring network satisfying a NetworkRequest. This should be passed when it's 224 // known that there may be unvalidated networks that could potentially be reaped, and when 225 // all networks have been rematched against all NetworkRequests. 226 REAP, 227 // Don't reap unvalidated networks. This should be passed when it's known that there are 228 // no unvalidated networks that could potentially be reaped, and when some networks have 229 // not yet been rematched against all NetworkRequests. 230 DONT_REAP 231 }; 232 233 /** 234 * used internally to change our mobile data enabled flag 235 */ 236 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 237 238 /** 239 * used internally to clear a wakelock when transitioning 240 * from one net to another. Clear happens when we get a new 241 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 242 * after a timeout if no network is found (typically 1 min). 243 */ 244 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 245 246 /** 247 * used internally to reload global proxy settings 248 */ 249 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 250 251 /** 252 * used internally to send a sticky broadcast delayed. 253 */ 254 private static final int EVENT_SEND_STICKY_BROADCAST_INTENT = 11; 255 256 /** 257 * PAC manager has received new port. 258 */ 259 private static final int EVENT_PROXY_HAS_CHANGED = 16; 260 261 /** 262 * used internally when registering NetworkFactories 263 * obj = NetworkFactoryInfo 264 */ 265 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 266 267 /** 268 * used internally when registering NetworkAgents 269 * obj = Messenger 270 */ 271 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 272 273 /** 274 * used to add a network request 275 * includes a NetworkRequestInfo 276 */ 277 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 278 279 /** 280 * indicates a timeout period is over - check if we had a network yet or not 281 * and if not, call the timeout calback (but leave the request live until they 282 * cancel it. 283 * includes a NetworkRequestInfo 284 */ 285 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 286 287 /** 288 * used to add a network listener - no request 289 * includes a NetworkRequestInfo 290 */ 291 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 292 293 /** 294 * used to remove a network request, either a listener or a real request 295 * arg1 = UID of caller 296 * obj = NetworkRequest 297 */ 298 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 299 300 /** 301 * used internally when registering NetworkFactories 302 * obj = Messenger 303 */ 304 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 305 306 /** 307 * used internally to expire a wakelock when transitioning 308 * from one net to another. Expire happens when we fail to find 309 * a new network (typically after 1 minute) - 310 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 311 * a replacement network. 312 */ 313 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 314 315 /** 316 * Used internally to indicate the system is ready. 317 */ 318 private static final int EVENT_SYSTEM_READY = 25; 319 320 /** 321 * used to add a network request with a pending intent 322 * includes a NetworkRequestInfo 323 */ 324 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 325 326 /** 327 * used to remove a pending intent and its associated network request. 328 * arg1 = UID of caller 329 * obj = PendingIntent 330 */ 331 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 332 333 /** 334 * used to specify whether a network should be used even if unvalidated. 335 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 336 * arg2 = whether to remember this choice in the future (1 or 0) 337 * obj = network 338 */ 339 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 340 341 /** 342 * used to ask the user to confirm a connection to an unvalidated network. 343 * obj = network 344 */ 345 private static final int EVENT_PROMPT_UNVALIDATED = 29; 346 347 /** 348 * used internally to (re)configure mobile data always-on settings. 349 */ 350 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 351 352 /** Handler used for internal events. */ 353 final private InternalHandler mHandler; 354 /** Handler used for incoming {@link NetworkStateTracker} events. */ 355 final private NetworkStateTrackerHandler mTrackerHandler; 356 357 private boolean mSystemReady; 358 private Intent mInitialBroadcast; 359 360 private PowerManager.WakeLock mNetTransitionWakeLock; 361 private String mNetTransitionWakeLockCausedBy = ""; 362 private int mNetTransitionWakeLockSerialNumber; 363 private int mNetTransitionWakeLockTimeout; 364 private final PowerManager.WakeLock mPendingIntentWakeLock; 365 366 private InetAddress mDefaultDns; 367 368 // used in DBG mode to track inet condition reports 369 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 370 private ArrayList mInetLog; 371 372 // track the current default http proxy - tell the world if we get a new one (real change) 373 private volatile ProxyInfo mDefaultProxy = null; 374 private Object mProxyLock = new Object(); 375 private boolean mDefaultProxyDisabled = false; 376 377 // track the global proxy. 378 private ProxyInfo mGlobalProxy = null; 379 380 private PacManager mPacManager = null; 381 382 final private SettingsObserver mSettingsObserver; 383 384 private UserManager mUserManager; 385 386 NetworkConfig[] mNetConfigs; 387 int mNetworksDefined; 388 389 // the set of network types that can only be enabled by system/sig apps 390 List mProtectedNetworks; 391 392 private DataConnectionStats mDataConnectionStats; 393 394 TelephonyManager mTelephonyManager; 395 396 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 397 private final static int MIN_NET_ID = 100; // some reserved marks 398 private final static int MAX_NET_ID = 65535; 399 private int mNextNetId = MIN_NET_ID; 400 401 // sequence number of NetworkRequests 402 private int mNextNetworkRequestId = 1; 403 404 /** 405 * Implements support for the legacy "one network per network type" model. 406 * 407 * We used to have a static array of NetworkStateTrackers, one for each 408 * network type, but that doesn't work any more now that we can have, 409 * for example, more that one wifi network. This class stores all the 410 * NetworkAgentInfo objects that support a given type, but the legacy 411 * API will only see the first one. 412 * 413 * It serves two main purposes: 414 * 415 * 1. Provide information about "the network for a given type" (since this 416 * API only supports one). 417 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 418 * the first network for a given type changes, or if the default network 419 * changes. 420 */ 421 private class LegacyTypeTracker { 422 423 private static final boolean DBG = true; 424 private static final boolean VDBG = false; 425 private static final String TAG = "CSLegacyTypeTracker"; 426 427 /** 428 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 429 * Each list holds references to all NetworkAgentInfos that are used to 430 * satisfy requests for that network type. 431 * 432 * This array is built out at startup such that an unsupported network 433 * doesn't get an ArrayList instance, making this a tristate: 434 * unsupported, supported but not active and active. 435 * 436 * The actual lists are populated when we scan the network types that 437 * are supported on this device. 438 */ 439 private ArrayList<NetworkAgentInfo> mTypeLists[]; 440 441 public LegacyTypeTracker() { 442 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 443 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 444 } 445 446 public void addSupportedType(int type) { 447 if (mTypeLists[type] != null) { 448 throw new IllegalStateException( 449 "legacy list for type " + type + "already initialized"); 450 } 451 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 452 } 453 454 public boolean isTypeSupported(int type) { 455 return isNetworkTypeValid(type) && mTypeLists[type] != null; 456 } 457 458 public NetworkAgentInfo getNetworkForType(int type) { 459 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 460 return mTypeLists[type].get(0); 461 } else { 462 return null; 463 } 464 } 465 466 private void maybeLogBroadcast(NetworkAgentInfo nai, boolean connected, int type, 467 boolean isDefaultNetwork) { 468 if (DBG) { 469 log("Sending " + (connected ? "connected" : "disconnected") + 470 " broadcast for type " + type + " " + nai.name() + 471 " isDefaultNetwork=" + isDefaultNetwork); 472 } 473 } 474 475 /** Adds the given network to the specified legacy type list. */ 476 public void add(int type, NetworkAgentInfo nai) { 477 if (!isTypeSupported(type)) { 478 return; // Invalid network type. 479 } 480 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 481 482 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 483 if (list.contains(nai)) { 484 loge("Attempting to register duplicate agent for type " + type + ": " + nai); 485 return; 486 } 487 488 list.add(nai); 489 490 // Send a broadcast if this is the first network of its type or if it's the default. 491 final boolean isDefaultNetwork = isDefaultNetwork(nai); 492 if (list.size() == 1 || isDefaultNetwork) { 493 maybeLogBroadcast(nai, true, type, isDefaultNetwork); 494 sendLegacyNetworkBroadcast(nai, true, type); 495 } 496 } 497 498 /** Removes the given network from the specified legacy type list. */ 499 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 500 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 501 if (list == null || list.isEmpty()) { 502 return; 503 } 504 505 final boolean wasFirstNetwork = list.get(0).equals(nai); 506 507 if (!list.remove(nai)) { 508 return; 509 } 510 511 if (wasFirstNetwork || wasDefault) { 512 maybeLogBroadcast(nai, false, type, wasDefault); 513 sendLegacyNetworkBroadcast(nai, false, type); 514 } 515 516 if (!list.isEmpty() && wasFirstNetwork) { 517 if (DBG) log("Other network available for type " + type + 518 ", sending connected broadcast"); 519 final NetworkAgentInfo replacement = list.get(0); 520 maybeLogBroadcast(replacement, false, type, isDefaultNetwork(replacement)); 521 sendLegacyNetworkBroadcast(replacement, false, type); 522 } 523 } 524 525 /** Removes the given network from all legacy type lists. */ 526 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 527 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 528 for (int type = 0; type < mTypeLists.length; type++) { 529 remove(type, nai, wasDefault); 530 } 531 } 532 533 private String naiToString(NetworkAgentInfo nai) { 534 String name = (nai != null) ? nai.name() : "null"; 535 String state = (nai.networkInfo != null) ? 536 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 537 "???/???"; 538 return name + " " + state; 539 } 540 541 public void dump(IndentingPrintWriter pw) { 542 for (int type = 0; type < mTypeLists.length; type++) { 543 if (mTypeLists[type] == null) continue; 544 pw.print(type + " "); 545 pw.increaseIndent(); 546 if (mTypeLists[type].size() == 0) pw.println("none"); 547 for (NetworkAgentInfo nai : mTypeLists[type]) { 548 pw.println(naiToString(nai)); 549 } 550 pw.decreaseIndent(); 551 } 552 } 553 554 // This class needs its own log method because it has a different TAG. 555 private void log(String s) { 556 Slog.d(TAG, s); 557 } 558 559 } 560 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 561 562 public ConnectivityService(Context context, INetworkManagementService netManager, 563 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 564 if (DBG) log("ConnectivityService starting up"); 565 566 mDefaultRequest = createInternetRequestForTransport(-1); 567 mNetworkRequests.put(mDefaultRequest, new NetworkRequestInfo( 568 null, mDefaultRequest, new Binder(), NetworkRequestInfo.REQUEST)); 569 570 mDefaultMobileDataRequest = createInternetRequestForTransport( 571 NetworkCapabilities.TRANSPORT_CELLULAR); 572 573 HandlerThread handlerThread = new HandlerThread("ConnectivityServiceThread"); 574 handlerThread.start(); 575 mHandler = new InternalHandler(handlerThread.getLooper()); 576 mTrackerHandler = new NetworkStateTrackerHandler(handlerThread.getLooper()); 577 578 // setup our unique device name 579 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 580 String id = Settings.Secure.getString(context.getContentResolver(), 581 Settings.Secure.ANDROID_ID); 582 if (id != null && id.length() > 0) { 583 String name = new String("android-").concat(id); 584 SystemProperties.set("net.hostname", name); 585 } 586 } 587 588 // read our default dns server ip 589 String dns = Settings.Global.getString(context.getContentResolver(), 590 Settings.Global.DEFAULT_DNS_SERVER); 591 if (dns == null || dns.length() == 0) { 592 dns = context.getResources().getString( 593 com.android.internal.R.string.config_default_dns_server); 594 } 595 try { 596 mDefaultDns = NetworkUtils.numericToInetAddress(dns); 597 } catch (IllegalArgumentException e) { 598 loge("Error setting defaultDns using " + dns); 599 } 600 601 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 602 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 603 604 mContext = checkNotNull(context, "missing Context"); 605 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 606 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 607 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 608 mKeyStore = KeyStore.getInstance(); 609 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 610 611 try { 612 mPolicyManager.registerListener(mPolicyListener); 613 } catch (RemoteException e) { 614 // ouch, no rules updates means some processes may never get network 615 loge("unable to register INetworkPolicyListener" + e.toString()); 616 } 617 618 final PowerManager powerManager = (PowerManager) context.getSystemService( 619 Context.POWER_SERVICE); 620 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 621 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 622 com.android.internal.R.integer.config_networkTransitionTimeout); 623 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 624 625 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 626 627 // TODO: What is the "correct" way to do determine if this is a wifi only device? 628 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 629 log("wifiOnly=" + wifiOnly); 630 String[] naStrings = context.getResources().getStringArray( 631 com.android.internal.R.array.networkAttributes); 632 for (String naString : naStrings) { 633 try { 634 NetworkConfig n = new NetworkConfig(naString); 635 if (VDBG) log("naString=" + naString + " config=" + n); 636 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 637 loge("Error in networkAttributes - ignoring attempt to define type " + 638 n.type); 639 continue; 640 } 641 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 642 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 643 n.type); 644 continue; 645 } 646 if (mNetConfigs[n.type] != null) { 647 loge("Error in networkAttributes - ignoring attempt to redefine type " + 648 n.type); 649 continue; 650 } 651 mLegacyTypeTracker.addSupportedType(n.type); 652 653 mNetConfigs[n.type] = n; 654 mNetworksDefined++; 655 } catch(Exception e) { 656 // ignore it - leave the entry null 657 } 658 } 659 660 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 661 if (mNetConfigs[TYPE_VPN] == null) { 662 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 663 // don't need to add TYPE_VPN to mNetConfigs. 664 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 665 mNetworksDefined++; // used only in the log() statement below. 666 } 667 668 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 669 670 mProtectedNetworks = new ArrayList<Integer>(); 671 int[] protectedNetworks = context.getResources().getIntArray( 672 com.android.internal.R.array.config_protectedNetworks); 673 for (int p : protectedNetworks) { 674 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 675 mProtectedNetworks.add(p); 676 } else { 677 if (DBG) loge("Ignoring protectedNetwork " + p); 678 } 679 } 680 681 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 682 && SystemProperties.get("ro.build.type").equals("eng"); 683 684 mTethering = new Tethering(mContext, mNetd, statsService, mHandler.getLooper()); 685 686 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 687 688 //set up the listener for user state for creating user VPNs 689 IntentFilter intentFilter = new IntentFilter(); 690 intentFilter.addAction(Intent.ACTION_USER_STARTING); 691 intentFilter.addAction(Intent.ACTION_USER_STOPPING); 692 mContext.registerReceiverAsUser( 693 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 694 695 try { 696 mNetd.registerObserver(mTethering); 697 mNetd.registerObserver(mDataActivityObserver); 698 } catch (RemoteException e) { 699 loge("Error registering observer :" + e); 700 } 701 702 if (DBG) { 703 mInetLog = new ArrayList(); 704 } 705 706 mSettingsObserver = new SettingsObserver(mContext, mHandler); 707 registerSettingsCallbacks(); 708 709 mDataConnectionStats = new DataConnectionStats(mContext); 710 mDataConnectionStats.startMonitoring(); 711 712 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 713 714 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 715 } 716 717 private NetworkRequest createInternetRequestForTransport(int transportType) { 718 NetworkCapabilities netCap = new NetworkCapabilities(); 719 netCap.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET); 720 netCap.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED); 721 if (transportType > -1) { 722 netCap.addTransportType(transportType); 723 } 724 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 725 } 726 727 private void handleMobileDataAlwaysOn() { 728 final boolean enable = (Settings.Global.getInt( 729 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 730 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 731 if (enable == isEnabled) { 732 return; // Nothing to do. 733 } 734 735 if (enable) { 736 handleRegisterNetworkRequest(new NetworkRequestInfo( 737 null, mDefaultMobileDataRequest, new Binder(), NetworkRequestInfo.REQUEST)); 738 } else { 739 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 740 } 741 } 742 743 private void registerSettingsCallbacks() { 744 // Watch for global HTTP proxy changes. 745 mSettingsObserver.observe( 746 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 747 EVENT_APPLY_GLOBAL_HTTP_PROXY); 748 749 // Watch for whether or not to keep mobile data always on. 750 mSettingsObserver.observe( 751 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 752 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 753 } 754 755 private synchronized int nextNetworkRequestId() { 756 return mNextNetworkRequestId++; 757 } 758 759 private int reserveNetId() { 760 synchronized (mNetworkForNetId) { 761 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 762 int netId = mNextNetId; 763 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 764 // Make sure NetID unused. http://b/16815182 765 if (!mNetIdInUse.get(netId)) { 766 mNetIdInUse.put(netId, true); 767 return netId; 768 } 769 } 770 } 771 throw new IllegalStateException("No free netIds"); 772 } 773 774 private NetworkState getFilteredNetworkState(int networkType, int uid) { 775 NetworkInfo info = null; 776 LinkProperties lp = null; 777 NetworkCapabilities nc = null; 778 Network network = null; 779 String subscriberId = null; 780 781 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 782 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 783 if (nai != null) { 784 synchronized (nai) { 785 info = new NetworkInfo(nai.networkInfo); 786 lp = new LinkProperties(nai.linkProperties); 787 nc = new NetworkCapabilities(nai.networkCapabilities); 788 // Network objects are outwardly immutable so there is no point to duplicating. 789 // Duplicating also precludes sharing socket factories and connection pools. 790 network = nai.network; 791 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 792 } 793 info.setType(networkType); 794 } else { 795 info = new NetworkInfo(networkType, 0, getNetworkTypeName(networkType), ""); 796 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 797 info.setIsAvailable(true); 798 lp = new LinkProperties(); 799 nc = new NetworkCapabilities(); 800 network = null; 801 } 802 info = getFilteredNetworkInfo(info, lp, uid); 803 } 804 805 return new NetworkState(info, lp, nc, network, subscriberId, null); 806 } 807 808 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 809 if (network == null) { 810 return null; 811 } 812 synchronized (mNetworkForNetId) { 813 return mNetworkForNetId.get(network.netId); 814 } 815 }; 816 817 private Network[] getVpnUnderlyingNetworks(int uid) { 818 if (!mLockdownEnabled) { 819 int user = UserHandle.getUserId(uid); 820 synchronized (mVpns) { 821 Vpn vpn = mVpns.get(user); 822 if (vpn != null && vpn.appliesToUid(uid)) { 823 return vpn.getUnderlyingNetworks(); 824 } 825 } 826 } 827 return null; 828 } 829 830 private NetworkState getUnfilteredActiveNetworkState(int uid) { 831 NetworkInfo info = null; 832 LinkProperties lp = null; 833 NetworkCapabilities nc = null; 834 Network network = null; 835 String subscriberId = null; 836 837 NetworkAgentInfo nai = mNetworkForRequestId.get(mDefaultRequest.requestId); 838 839 final Network[] networks = getVpnUnderlyingNetworks(uid); 840 if (networks != null) { 841 // getUnderlyingNetworks() returns: 842 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 843 // empty array => the VPN explicitly said "no default network". 844 // non-empty array => the VPN specified one or more default networks; we use the 845 // first one. 846 if (networks.length > 0) { 847 nai = getNetworkAgentInfoForNetwork(networks[0]); 848 } else { 849 nai = null; 850 } 851 } 852 853 if (nai != null) { 854 synchronized (nai) { 855 info = new NetworkInfo(nai.networkInfo); 856 lp = new LinkProperties(nai.linkProperties); 857 nc = new NetworkCapabilities(nai.networkCapabilities); 858 // Network objects are outwardly immutable so there is no point to duplicating. 859 // Duplicating also precludes sharing socket factories and connection pools. 860 network = nai.network; 861 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 862 } 863 } 864 865 return new NetworkState(info, lp, nc, network, subscriberId, null); 866 } 867 868 /** 869 * Check if UID should be blocked from using the network with the given LinkProperties. 870 */ 871 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 872 final boolean networkCostly; 873 final int uidRules; 874 875 final String iface = (lp == null ? "" : lp.getInterfaceName()); 876 synchronized (mRulesLock) { 877 networkCostly = mMeteredIfaces.contains(iface); 878 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 879 } 880 881 if ((uidRules & RULE_REJECT_ALL) != 0 882 || (networkCostly && (uidRules & RULE_REJECT_METERED) != 0)) { 883 return true; 884 } 885 886 // no restrictive rules; network is visible 887 return false; 888 } 889 890 /** 891 * Return a filtered {@link NetworkInfo}, potentially marked 892 * {@link DetailedState#BLOCKED} based on 893 * {@link #isNetworkWithLinkPropertiesBlocked}. 894 */ 895 private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, LinkProperties lp, int uid) { 896 if (info != null && isNetworkWithLinkPropertiesBlocked(lp, uid)) { 897 // network is blocked; clone and override state 898 info = new NetworkInfo(info); 899 info.setDetailedState(DetailedState.BLOCKED, null, null); 900 if (DBG) { 901 log("returning Blocked NetworkInfo for ifname=" + 902 lp.getInterfaceName() + ", uid=" + uid); 903 } 904 } 905 if (info != null && mLockdownTracker != null) { 906 info = mLockdownTracker.augmentNetworkInfo(info); 907 if (DBG) log("returning Locked NetworkInfo"); 908 } 909 return info; 910 } 911 912 /** 913 * Return NetworkInfo for the active (i.e., connected) network interface. 914 * It is assumed that at most one network is active at a time. If more 915 * than one is active, it is indeterminate which will be returned. 916 * @return the info for the active network, or {@code null} if none is 917 * active 918 */ 919 @Override 920 public NetworkInfo getActiveNetworkInfo() { 921 enforceAccessPermission(); 922 final int uid = Binder.getCallingUid(); 923 NetworkState state = getUnfilteredActiveNetworkState(uid); 924 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 925 } 926 927 @Override 928 public Network getActiveNetwork() { 929 enforceAccessPermission(); 930 final int uid = Binder.getCallingUid(); 931 final int user = UserHandle.getUserId(uid); 932 int vpnNetId = NETID_UNSET; 933 synchronized (mVpns) { 934 final Vpn vpn = mVpns.get(user); 935 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 936 } 937 NetworkAgentInfo nai; 938 if (vpnNetId != NETID_UNSET) { 939 synchronized (mNetworkForNetId) { 940 nai = mNetworkForNetId.get(vpnNetId); 941 } 942 if (nai != null) return nai.network; 943 } 944 nai = getDefaultNetwork(); 945 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 946 return nai != null ? nai.network : null; 947 } 948 949 /** 950 * Find the first Provisioning network. 951 * 952 * @return NetworkInfo or null if none. 953 */ 954 private NetworkInfo getProvisioningNetworkInfo() { 955 enforceAccessPermission(); 956 957 // Find the first Provisioning Network 958 NetworkInfo provNi = null; 959 for (NetworkInfo ni : getAllNetworkInfo()) { 960 if (ni.isConnectedToProvisioningNetwork()) { 961 provNi = ni; 962 break; 963 } 964 } 965 if (DBG) log("getProvisioningNetworkInfo: X provNi=" + provNi); 966 return provNi; 967 } 968 969 /** 970 * Find the first Provisioning network or the ActiveDefaultNetwork 971 * if there is no Provisioning network 972 * 973 * @return NetworkInfo or null if none. 974 */ 975 @Override 976 public NetworkInfo getProvisioningOrActiveNetworkInfo() { 977 enforceAccessPermission(); 978 979 NetworkInfo provNi = getProvisioningNetworkInfo(); 980 if (provNi == null) { 981 provNi = getActiveNetworkInfo(); 982 } 983 if (DBG) log("getProvisioningOrActiveNetworkInfo: X provNi=" + provNi); 984 return provNi; 985 } 986 987 public NetworkInfo getActiveNetworkInfoUnfiltered() { 988 enforceAccessPermission(); 989 final int uid = Binder.getCallingUid(); 990 NetworkState state = getUnfilteredActiveNetworkState(uid); 991 return state.networkInfo; 992 } 993 994 @Override 995 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 996 enforceConnectivityInternalPermission(); 997 NetworkState state = getUnfilteredActiveNetworkState(uid); 998 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 999 } 1000 1001 @Override 1002 public NetworkInfo getNetworkInfo(int networkType) { 1003 enforceAccessPermission(); 1004 final int uid = Binder.getCallingUid(); 1005 if (getVpnUnderlyingNetworks(uid) != null) { 1006 // A VPN is active, so we may need to return one of its underlying networks. This 1007 // information is not available in LegacyTypeTracker, so we have to get it from 1008 // getUnfilteredActiveNetworkState. 1009 NetworkState state = getUnfilteredActiveNetworkState(uid); 1010 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1011 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 1012 } 1013 } 1014 NetworkState state = getFilteredNetworkState(networkType, uid); 1015 return state.networkInfo; 1016 } 1017 1018 @Override 1019 public NetworkInfo getNetworkInfoForNetwork(Network network) { 1020 enforceAccessPermission(); 1021 final int uid = Binder.getCallingUid(); 1022 NetworkInfo info = null; 1023 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1024 if (nai != null) { 1025 synchronized (nai) { 1026 info = new NetworkInfo(nai.networkInfo); 1027 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 1028 } 1029 } 1030 return info; 1031 } 1032 1033 @Override 1034 public NetworkInfo[] getAllNetworkInfo() { 1035 enforceAccessPermission(); 1036 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1037 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1038 networkType++) { 1039 NetworkInfo info = getNetworkInfo(networkType); 1040 if (info != null) { 1041 result.add(info); 1042 } 1043 } 1044 return result.toArray(new NetworkInfo[result.size()]); 1045 } 1046 1047 @Override 1048 public Network getNetworkForType(int networkType) { 1049 enforceAccessPermission(); 1050 final int uid = Binder.getCallingUid(); 1051 NetworkState state = getFilteredNetworkState(networkType, uid); 1052 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1053 return state.network; 1054 } 1055 return null; 1056 } 1057 1058 @Override 1059 public Network[] getAllNetworks() { 1060 enforceAccessPermission(); 1061 synchronized (mNetworkForNetId) { 1062 final Network[] result = new Network[mNetworkForNetId.size()]; 1063 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1064 result[i] = mNetworkForNetId.valueAt(i).network; 1065 } 1066 return result; 1067 } 1068 } 1069 1070 private NetworkCapabilities getNetworkCapabilitiesAndValidation(NetworkAgentInfo nai) { 1071 if (nai != null) { 1072 synchronized (nai) { 1073 if (nai.created) { 1074 NetworkCapabilities nc = new NetworkCapabilities(nai.networkCapabilities); 1075 if (nai.lastValidated) { 1076 nc.addCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED); 1077 } else { 1078 nc.removeCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED); 1079 } 1080 return nc; 1081 } 1082 } 1083 } 1084 return null; 1085 } 1086 1087 @Override 1088 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1089 // The basic principle is: if an app's traffic could possibly go over a 1090 // network, without the app doing anything multinetwork-specific, 1091 // (hence, by "default"), then include that network's capabilities in 1092 // the array. 1093 // 1094 // In the normal case, app traffic only goes over the system's default 1095 // network connection, so that's the only network returned. 1096 // 1097 // With a VPN in force, some app traffic may go into the VPN, and thus 1098 // over whatever underlying networks the VPN specifies, while other app 1099 // traffic may go over the system default network (e.g.: a split-tunnel 1100 // VPN, or an app disallowed by the VPN), so the set of networks 1101 // returned includes the VPN's underlying networks and the system 1102 // default. 1103 enforceAccessPermission(); 1104 1105 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1106 1107 NetworkAgentInfo nai = getDefaultNetwork(); 1108 NetworkCapabilities nc = getNetworkCapabilitiesAndValidation(getDefaultNetwork()); 1109 if (nc != null) { 1110 result.put(nai.network, nc); 1111 } 1112 1113 if (!mLockdownEnabled) { 1114 synchronized (mVpns) { 1115 Vpn vpn = mVpns.get(userId); 1116 if (vpn != null) { 1117 Network[] networks = vpn.getUnderlyingNetworks(); 1118 if (networks != null) { 1119 for (Network network : networks) { 1120 nai = getNetworkAgentInfoForNetwork(network); 1121 nc = getNetworkCapabilitiesAndValidation(nai); 1122 if (nc != null) { 1123 result.put(nai.network, nc); 1124 } 1125 } 1126 } 1127 } 1128 } 1129 } 1130 1131 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1132 out = result.values().toArray(out); 1133 return out; 1134 } 1135 1136 @Override 1137 public boolean isNetworkSupported(int networkType) { 1138 enforceAccessPermission(); 1139 return mLegacyTypeTracker.isTypeSupported(networkType); 1140 } 1141 1142 /** 1143 * Return LinkProperties for the active (i.e., connected) default 1144 * network interface. It is assumed that at most one default network 1145 * is active at a time. If more than one is active, it is indeterminate 1146 * which will be returned. 1147 * @return the ip properties for the active network, or {@code null} if 1148 * none is active 1149 */ 1150 @Override 1151 public LinkProperties getActiveLinkProperties() { 1152 enforceAccessPermission(); 1153 final int uid = Binder.getCallingUid(); 1154 NetworkState state = getUnfilteredActiveNetworkState(uid); 1155 return state.linkProperties; 1156 } 1157 1158 @Override 1159 public LinkProperties getLinkPropertiesForType(int networkType) { 1160 enforceAccessPermission(); 1161 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1162 if (nai != null) { 1163 synchronized (nai) { 1164 return new LinkProperties(nai.linkProperties); 1165 } 1166 } 1167 return null; 1168 } 1169 1170 // TODO - this should be ALL networks 1171 @Override 1172 public LinkProperties getLinkProperties(Network network) { 1173 enforceAccessPermission(); 1174 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1175 if (nai != null) { 1176 synchronized (nai) { 1177 return new LinkProperties(nai.linkProperties); 1178 } 1179 } 1180 return null; 1181 } 1182 1183 @Override 1184 public NetworkCapabilities getNetworkCapabilities(Network network) { 1185 enforceAccessPermission(); 1186 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1187 if (nai != null) { 1188 synchronized (nai) { 1189 NetworkCapabilities nc = new NetworkCapabilities(nai.networkCapabilities); 1190 if (nai.lastValidated) { 1191 nc.addCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED); 1192 } else { 1193 nc.removeCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED); 1194 } 1195 return nc; 1196 } 1197 } 1198 return null; 1199 } 1200 1201 @Override 1202 public NetworkState[] getAllNetworkState() { 1203 // Require internal since we're handing out IMSI details 1204 enforceConnectivityInternalPermission(); 1205 1206 final ArrayList<NetworkState> result = Lists.newArrayList(); 1207 for (Network network : getAllNetworks()) { 1208 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1209 if (nai != null) { 1210 synchronized (nai) { 1211 final String subscriberId = (nai.networkMisc != null) 1212 ? nai.networkMisc.subscriberId : null; 1213 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1214 nai.networkCapabilities, network, subscriberId, null)); 1215 } 1216 } 1217 } 1218 return result.toArray(new NetworkState[result.size()]); 1219 } 1220 1221 @Override 1222 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1223 enforceAccessPermission(); 1224 final int uid = Binder.getCallingUid(); 1225 final long token = Binder.clearCallingIdentity(); 1226 try { 1227 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1228 if (state.networkInfo != null) { 1229 try { 1230 return mPolicyManager.getNetworkQuotaInfo(state); 1231 } catch (RemoteException e) { 1232 } 1233 } 1234 return null; 1235 } finally { 1236 Binder.restoreCallingIdentity(token); 1237 } 1238 } 1239 1240 @Override 1241 public boolean isActiveNetworkMetered() { 1242 enforceAccessPermission(); 1243 final int uid = Binder.getCallingUid(); 1244 final long token = Binder.clearCallingIdentity(); 1245 try { 1246 return isActiveNetworkMeteredUnchecked(uid); 1247 } finally { 1248 Binder.restoreCallingIdentity(token); 1249 } 1250 } 1251 1252 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1253 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1254 if (state.networkInfo != null) { 1255 try { 1256 return mPolicyManager.isNetworkMetered(state); 1257 } catch (RemoteException e) { 1258 } 1259 } 1260 return false; 1261 } 1262 1263 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1264 @Override 1265 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1266 int deviceType = Integer.parseInt(label); 1267 sendDataActivityBroadcast(deviceType, active, tsNanos); 1268 } 1269 }; 1270 1271 /** 1272 * Ensure that a network route exists to deliver traffic to the specified 1273 * host via the specified network interface. 1274 * @param networkType the type of the network over which traffic to the 1275 * specified host is to be routed 1276 * @param hostAddress the IP address of the host to which the route is 1277 * desired 1278 * @return {@code true} on success, {@code false} on failure 1279 */ 1280 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1281 enforceChangePermission(); 1282 if (mProtectedNetworks.contains(networkType)) { 1283 enforceConnectivityInternalPermission(); 1284 } 1285 1286 InetAddress addr; 1287 try { 1288 addr = InetAddress.getByAddress(hostAddress); 1289 } catch (UnknownHostException e) { 1290 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1291 return false; 1292 } 1293 1294 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1295 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1296 return false; 1297 } 1298 1299 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1300 if (nai == null) { 1301 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1302 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1303 } else { 1304 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1305 } 1306 return false; 1307 } 1308 1309 DetailedState netState; 1310 synchronized (nai) { 1311 netState = nai.networkInfo.getDetailedState(); 1312 } 1313 1314 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1315 if (VDBG) { 1316 log("requestRouteToHostAddress on down network " 1317 + "(" + networkType + ") - dropped" 1318 + " netState=" + netState); 1319 } 1320 return false; 1321 } 1322 1323 final int uid = Binder.getCallingUid(); 1324 final long token = Binder.clearCallingIdentity(); 1325 try { 1326 LinkProperties lp; 1327 int netId; 1328 synchronized (nai) { 1329 lp = nai.linkProperties; 1330 netId = nai.network.netId; 1331 } 1332 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1333 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1334 return ok; 1335 } finally { 1336 Binder.restoreCallingIdentity(token); 1337 } 1338 } 1339 1340 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1341 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1342 if (bestRoute == null) { 1343 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1344 } else { 1345 String iface = bestRoute.getInterface(); 1346 if (bestRoute.getGateway().equals(addr)) { 1347 // if there is no better route, add the implied hostroute for our gateway 1348 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1349 } else { 1350 // if we will connect to this through another route, add a direct route 1351 // to it's gateway 1352 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1353 } 1354 } 1355 if (DBG) log("Adding " + bestRoute + " for interface " + bestRoute.getInterface()); 1356 try { 1357 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1358 } catch (Exception e) { 1359 // never crash - catch them all 1360 if (DBG) loge("Exception trying to add a route: " + e); 1361 return false; 1362 } 1363 return true; 1364 } 1365 1366 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1367 @Override 1368 public void onUidRulesChanged(int uid, int uidRules) { 1369 // caller is NPMS, since we only register with them 1370 if (LOGD_RULES) { 1371 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1372 } 1373 1374 synchronized (mRulesLock) { 1375 // skip update when we've already applied rules 1376 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1377 if (oldRules == uidRules) return; 1378 1379 mUidRules.put(uid, uidRules); 1380 } 1381 1382 // TODO: notify UID when it has requested targeted updates 1383 } 1384 1385 @Override 1386 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1387 // caller is NPMS, since we only register with them 1388 if (LOGD_RULES) { 1389 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1390 } 1391 1392 synchronized (mRulesLock) { 1393 mMeteredIfaces.clear(); 1394 for (String iface : meteredIfaces) { 1395 mMeteredIfaces.add(iface); 1396 } 1397 } 1398 } 1399 1400 @Override 1401 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1402 // caller is NPMS, since we only register with them 1403 if (LOGD_RULES) { 1404 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1405 } 1406 } 1407 }; 1408 1409 private void enforceInternetPermission() { 1410 mContext.enforceCallingOrSelfPermission( 1411 android.Manifest.permission.INTERNET, 1412 "ConnectivityService"); 1413 } 1414 1415 private void enforceAccessPermission() { 1416 mContext.enforceCallingOrSelfPermission( 1417 android.Manifest.permission.ACCESS_NETWORK_STATE, 1418 "ConnectivityService"); 1419 } 1420 1421 private void enforceChangePermission() { 1422 mContext.enforceCallingOrSelfPermission( 1423 android.Manifest.permission.CHANGE_NETWORK_STATE, 1424 "ConnectivityService"); 1425 } 1426 1427 private void enforceTetherAccessPermission() { 1428 mContext.enforceCallingOrSelfPermission( 1429 android.Manifest.permission.ACCESS_NETWORK_STATE, 1430 "ConnectivityService"); 1431 } 1432 1433 private void enforceConnectivityInternalPermission() { 1434 mContext.enforceCallingOrSelfPermission( 1435 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1436 "ConnectivityService"); 1437 } 1438 1439 public void sendConnectedBroadcast(NetworkInfo info) { 1440 enforceConnectivityInternalPermission(); 1441 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1442 } 1443 1444 private void sendInetConditionBroadcast(NetworkInfo info) { 1445 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1446 } 1447 1448 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1449 if (mLockdownTracker != null) { 1450 info = mLockdownTracker.augmentNetworkInfo(info); 1451 } 1452 1453 Intent intent = new Intent(bcastType); 1454 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1455 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1456 if (info.isFailover()) { 1457 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1458 info.setFailover(false); 1459 } 1460 if (info.getReason() != null) { 1461 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1462 } 1463 if (info.getExtraInfo() != null) { 1464 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1465 info.getExtraInfo()); 1466 } 1467 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1468 return intent; 1469 } 1470 1471 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1472 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1473 } 1474 1475 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1476 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1477 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1478 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1479 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1480 final long ident = Binder.clearCallingIdentity(); 1481 try { 1482 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1483 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1484 } finally { 1485 Binder.restoreCallingIdentity(ident); 1486 } 1487 } 1488 1489 private void sendStickyBroadcast(Intent intent) { 1490 synchronized(this) { 1491 if (!mSystemReady) { 1492 mInitialBroadcast = new Intent(intent); 1493 } 1494 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1495 if (DBG) { 1496 log("sendStickyBroadcast: action=" + intent.getAction()); 1497 } 1498 1499 final long ident = Binder.clearCallingIdentity(); 1500 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1501 final IBatteryStats bs = BatteryStatsService.getService(); 1502 try { 1503 NetworkInfo ni = intent.getParcelableExtra( 1504 ConnectivityManager.EXTRA_NETWORK_INFO); 1505 bs.noteConnectivityChanged(intent.getIntExtra( 1506 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1507 ni != null ? ni.getState().toString() : "?"); 1508 } catch (RemoteException e) { 1509 } 1510 } 1511 try { 1512 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 1513 } finally { 1514 Binder.restoreCallingIdentity(ident); 1515 } 1516 } 1517 } 1518 1519 void systemReady() { 1520 loadGlobalProxy(); 1521 1522 synchronized(this) { 1523 mSystemReady = true; 1524 if (mInitialBroadcast != null) { 1525 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1526 mInitialBroadcast = null; 1527 } 1528 } 1529 // load the global proxy at startup 1530 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1531 1532 // Try bringing up tracker, but if KeyStore isn't ready yet, wait 1533 // for user to unlock device. 1534 if (!updateLockdownVpn()) { 1535 final IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT); 1536 mContext.registerReceiver(mUserPresentReceiver, filter); 1537 } 1538 1539 // Configure whether mobile data is always on. 1540 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1541 1542 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1543 1544 mPermissionMonitor.startMonitoring(); 1545 } 1546 1547 private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() { 1548 @Override 1549 public void onReceive(Context context, Intent intent) { 1550 // Try creating lockdown tracker, since user present usually means 1551 // unlocked keystore. 1552 if (updateLockdownVpn()) { 1553 mContext.unregisterReceiver(this); 1554 } 1555 } 1556 }; 1557 1558 /** @hide */ 1559 @Override 1560 public void captivePortalCheckCompleted(NetworkInfo info, boolean isCaptivePortal) { 1561 enforceConnectivityInternalPermission(); 1562 if (DBG) log("captivePortalCheckCompleted: ni=" + info + " captive=" + isCaptivePortal); 1563// mNetTrackers[info.getType()].captivePortalCheckCompleted(isCaptivePortal); 1564 } 1565 1566 /** 1567 * Setup data activity tracking for the given network. 1568 * 1569 * Every {@code setupDataActivityTracking} should be paired with a 1570 * {@link #removeDataActivityTracking} for cleanup. 1571 */ 1572 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1573 final String iface = networkAgent.linkProperties.getInterfaceName(); 1574 1575 final int timeout; 1576 int type = ConnectivityManager.TYPE_NONE; 1577 1578 if (networkAgent.networkCapabilities.hasTransport( 1579 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1580 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1581 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1582 5); 1583 type = ConnectivityManager.TYPE_MOBILE; 1584 } else if (networkAgent.networkCapabilities.hasTransport( 1585 NetworkCapabilities.TRANSPORT_WIFI)) { 1586 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1587 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1588 5); 1589 type = ConnectivityManager.TYPE_WIFI; 1590 } else { 1591 // do not track any other networks 1592 timeout = 0; 1593 } 1594 1595 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1596 try { 1597 mNetd.addIdleTimer(iface, timeout, type); 1598 } catch (Exception e) { 1599 // You shall not crash! 1600 loge("Exception in setupDataActivityTracking " + e); 1601 } 1602 } 1603 } 1604 1605 /** 1606 * Remove data activity tracking when network disconnects. 1607 */ 1608 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1609 final String iface = networkAgent.linkProperties.getInterfaceName(); 1610 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1611 1612 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1613 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1614 try { 1615 // the call fails silently if no idletimer setup for this interface 1616 mNetd.removeIdleTimer(iface); 1617 } catch (Exception e) { 1618 loge("Exception in removeDataActivityTracking " + e); 1619 } 1620 } 1621 } 1622 1623 /** 1624 * Reads the network specific MTU size from reources. 1625 * and set it on it's iface. 1626 */ 1627 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1628 final String iface = newLp.getInterfaceName(); 1629 final int mtu = newLp.getMtu(); 1630 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1631 if (VDBG) log("identical MTU - not setting"); 1632 return; 1633 } 1634 1635 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1636 loge("Unexpected mtu value: " + mtu + ", " + iface); 1637 return; 1638 } 1639 1640 // Cannot set MTU without interface name 1641 if (TextUtils.isEmpty(iface)) { 1642 loge("Setting MTU size with null iface."); 1643 return; 1644 } 1645 1646 try { 1647 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1648 mNetd.setMtu(iface, mtu); 1649 } catch (Exception e) { 1650 Slog.e(TAG, "exception in setMtu()" + e); 1651 } 1652 } 1653 1654 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1655 1656 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1657 if (isDefaultNetwork(nai) == false) { 1658 return; 1659 } 1660 1661 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1662 String[] values = null; 1663 if (tcpBufferSizes != null) { 1664 values = tcpBufferSizes.split(","); 1665 } 1666 1667 if (values == null || values.length != 6) { 1668 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1669 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1670 values = tcpBufferSizes.split(","); 1671 } 1672 1673 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1674 1675 try { 1676 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1677 1678 final String prefix = "/sys/kernel/ipv4/tcp_"; 1679 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1680 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1681 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1682 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1683 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1684 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1685 mCurrentTcpBufferSizes = tcpBufferSizes; 1686 } catch (IOException e) { 1687 loge("Can't set TCP buffer sizes:" + e); 1688 } 1689 1690 final String defaultRwndKey = "net.tcp.default_init_rwnd"; 1691 int defaultRwndValue = SystemProperties.getInt(defaultRwndKey, 0); 1692 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1693 Settings.Global.TCP_DEFAULT_INIT_RWND, defaultRwndValue); 1694 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1695 if (rwndValue != 0) { 1696 SystemProperties.set(sysctlKey, rwndValue.toString()); 1697 } 1698 } 1699 1700 private void flushVmDnsCache() { 1701 /* 1702 * Tell the VMs to toss their DNS caches 1703 */ 1704 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1705 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1706 /* 1707 * Connectivity events can happen before boot has completed ... 1708 */ 1709 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1710 final long ident = Binder.clearCallingIdentity(); 1711 try { 1712 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1713 } finally { 1714 Binder.restoreCallingIdentity(ident); 1715 } 1716 } 1717 1718 @Override 1719 public int getRestoreDefaultNetworkDelay(int networkType) { 1720 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1721 NETWORK_RESTORE_DELAY_PROP_NAME); 1722 if(restoreDefaultNetworkDelayStr != null && 1723 restoreDefaultNetworkDelayStr.length() != 0) { 1724 try { 1725 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1726 } catch (NumberFormatException e) { 1727 } 1728 } 1729 // if the system property isn't set, use the value for the apn type 1730 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1731 1732 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1733 (mNetConfigs[networkType] != null)) { 1734 ret = mNetConfigs[networkType].restoreTime; 1735 } 1736 return ret; 1737 } 1738 1739 @Override 1740 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1741 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1742 if (mContext.checkCallingOrSelfPermission( 1743 android.Manifest.permission.DUMP) 1744 != PackageManager.PERMISSION_GRANTED) { 1745 pw.println("Permission Denial: can't dump ConnectivityService " + 1746 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1747 Binder.getCallingUid()); 1748 return; 1749 } 1750 1751 pw.println("NetworkFactories for:"); 1752 pw.increaseIndent(); 1753 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1754 pw.println(nfi.name); 1755 } 1756 pw.decreaseIndent(); 1757 pw.println(); 1758 1759 NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId); 1760 pw.print("Active default network: "); 1761 if (defaultNai == null) { 1762 pw.println("none"); 1763 } else { 1764 pw.println(defaultNai.network.netId); 1765 } 1766 pw.println(); 1767 1768 pw.println("Current Networks:"); 1769 pw.increaseIndent(); 1770 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1771 pw.println(nai.toString()); 1772 pw.increaseIndent(); 1773 pw.println("Requests:"); 1774 pw.increaseIndent(); 1775 for (int i = 0; i < nai.networkRequests.size(); i++) { 1776 pw.println(nai.networkRequests.valueAt(i).toString()); 1777 } 1778 pw.decreaseIndent(); 1779 pw.println("Lingered:"); 1780 pw.increaseIndent(); 1781 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1782 pw.decreaseIndent(); 1783 pw.decreaseIndent(); 1784 } 1785 pw.decreaseIndent(); 1786 pw.println(); 1787 1788 pw.println("Network Requests:"); 1789 pw.increaseIndent(); 1790 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1791 pw.println(nri.toString()); 1792 } 1793 pw.println(); 1794 pw.decreaseIndent(); 1795 1796 pw.println("mLegacyTypeTracker:"); 1797 pw.increaseIndent(); 1798 mLegacyTypeTracker.dump(pw); 1799 pw.decreaseIndent(); 1800 pw.println(); 1801 1802 synchronized (this) { 1803 pw.println("NetworkTransitionWakeLock is currently " + 1804 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held."); 1805 pw.println("It was last requested for "+mNetTransitionWakeLockCausedBy); 1806 } 1807 pw.println(); 1808 1809 mTethering.dump(fd, pw, args); 1810 1811 if (mInetLog != null) { 1812 pw.println(); 1813 pw.println("Inet condition reports:"); 1814 pw.increaseIndent(); 1815 for(int i = 0; i < mInetLog.size(); i++) { 1816 pw.println(mInetLog.get(i)); 1817 } 1818 pw.decreaseIndent(); 1819 } 1820 } 1821 1822 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, String msg) { 1823 if (nai.network == null) return false; 1824 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1825 if (officialNai != null && officialNai.equals(nai)) return true; 1826 if (officialNai != null || VDBG) { 1827 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1828 " - " + nai); 1829 } 1830 return false; 1831 } 1832 1833 private boolean isRequest(NetworkRequest request) { 1834 return mNetworkRequests.get(request).isRequest; 1835 } 1836 1837 // must be stateless - things change under us. 1838 private class NetworkStateTrackerHandler extends Handler { 1839 public NetworkStateTrackerHandler(Looper looper) { 1840 super(looper); 1841 } 1842 1843 @Override 1844 public void handleMessage(Message msg) { 1845 NetworkInfo info; 1846 switch (msg.what) { 1847 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1848 handleAsyncChannelHalfConnect(msg); 1849 break; 1850 } 1851 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1852 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1853 if (nai != null) nai.asyncChannel.disconnect(); 1854 break; 1855 } 1856 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1857 handleAsyncChannelDisconnected(msg); 1858 break; 1859 } 1860 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1861 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1862 if (nai == null) { 1863 loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent"); 1864 } else { 1865 updateCapabilities(nai, (NetworkCapabilities)msg.obj); 1866 } 1867 break; 1868 } 1869 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1870 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1871 if (nai == null) { 1872 loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED"); 1873 } else { 1874 if (VDBG) { 1875 log("Update of LinkProperties for " + nai.name() + 1876 "; created=" + nai.created); 1877 } 1878 LinkProperties oldLp = nai.linkProperties; 1879 synchronized (nai) { 1880 nai.linkProperties = (LinkProperties)msg.obj; 1881 } 1882 if (nai.created) updateLinkProperties(nai, oldLp); 1883 } 1884 break; 1885 } 1886 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1887 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1888 if (nai == null) { 1889 loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent"); 1890 break; 1891 } 1892 info = (NetworkInfo) msg.obj; 1893 updateNetworkInfo(nai, info); 1894 break; 1895 } 1896 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1897 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1898 if (nai == null) { 1899 loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent"); 1900 break; 1901 } 1902 Integer score = (Integer) msg.obj; 1903 if (score != null) updateNetworkScore(nai, score.intValue()); 1904 break; 1905 } 1906 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 1907 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1908 if (nai == null) { 1909 loge("EVENT_UID_RANGES_ADDED from unknown NetworkAgent"); 1910 break; 1911 } 1912 try { 1913 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1914 } catch (Exception e) { 1915 // Never crash! 1916 loge("Exception in addVpnUidRanges: " + e); 1917 } 1918 break; 1919 } 1920 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 1921 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1922 if (nai == null) { 1923 loge("EVENT_UID_RANGES_REMOVED from unknown NetworkAgent"); 1924 break; 1925 } 1926 try { 1927 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1928 } catch (Exception e) { 1929 // Never crash! 1930 loge("Exception in removeVpnUidRanges: " + e); 1931 } 1932 break; 1933 } 1934 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 1935 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1936 if (nai == null) { 1937 loge("EVENT_SET_EXPLICITLY_SELECTED from unknown NetworkAgent"); 1938 break; 1939 } 1940 if (nai.created && !nai.networkMisc.explicitlySelected) { 1941 loge("ERROR: created network explicitly selected."); 1942 } 1943 nai.networkMisc.explicitlySelected = true; 1944 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 1945 break; 1946 } 1947 case NetworkMonitor.EVENT_NETWORK_TESTED: { 1948 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 1949 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_VALIDATED")) { 1950 boolean valid = (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 1951 nai.lastValidated = valid; 1952 if (valid) { 1953 if (DBG) log("Validated " + nai.name()); 1954 if (!nai.everValidated) { 1955 nai.everValidated = true; 1956 rematchNetworkAndRequests(nai, NascentState.JUST_VALIDATED, 1957 ReapUnvalidatedNetworks.REAP); 1958 // If score has changed, rebroadcast to NetworkFactories. b/17726566 1959 sendUpdatedScoreToFactories(nai); 1960 } 1961 } 1962 updateInetCondition(nai); 1963 // Let the NetworkAgent know the state of its network 1964 nai.asyncChannel.sendMessage( 1965 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 1966 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 1967 0, null); 1968 1969 // TODO: trigger a NetworkCapabilities update so that the dialog can know 1970 // that the network is now validated and close itself. 1971 } 1972 break; 1973 } 1974 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 1975 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 1976 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_LINGER_COMPLETE")) { 1977 handleLingerComplete(nai); 1978 } 1979 break; 1980 } 1981 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 1982 if (msg.arg1 == 0) { 1983 setProvNotificationVisibleIntent(false, msg.arg2, 0, null, null); 1984 } else { 1985 final NetworkAgentInfo nai; 1986 synchronized (mNetworkForNetId) { 1987 nai = mNetworkForNetId.get(msg.arg2); 1988 } 1989 if (nai == null) { 1990 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 1991 break; 1992 } 1993 nai.captivePortalDetected = true; 1994 setProvNotificationVisibleIntent(true, msg.arg2, nai.networkInfo.getType(), 1995 nai.networkInfo.getExtraInfo(), (PendingIntent)msg.obj); 1996 } 1997 break; 1998 } 1999 } 2000 } 2001 } 2002 2003 // Cancel any lingering so the linger timeout doesn't teardown a network. 2004 // This should be called when a network begins satisfying a NetworkRequest. 2005 // Note: depending on what state the NetworkMonitor is in (e.g., 2006 // if it's awaiting captive portal login, or if validation failed), this 2007 // may trigger a re-evaluation of the network. 2008 private void unlinger(NetworkAgentInfo nai) { 2009 if (VDBG) log("Canceling linger of " + nai.name()); 2010 // If network has never been validated, it cannot have been lingered, so don't bother 2011 // needlessly triggering a re-evaluation. 2012 if (!nai.everValidated) return; 2013 nai.networkLingered.clear(); 2014 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2015 } 2016 2017 private void handleAsyncChannelHalfConnect(Message msg) { 2018 AsyncChannel ac = (AsyncChannel) msg.obj; 2019 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2020 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2021 if (VDBG) log("NetworkFactory connected"); 2022 // A network factory has connected. Send it all current NetworkRequests. 2023 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2024 if (nri.isRequest == false) continue; 2025 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2026 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2027 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2028 } 2029 } else { 2030 loge("Error connecting NetworkFactory"); 2031 mNetworkFactoryInfos.remove(msg.obj); 2032 } 2033 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2034 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2035 if (VDBG) log("NetworkAgent connected"); 2036 // A network agent has requested a connection. Establish the connection. 2037 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2038 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2039 } else { 2040 loge("Error connecting NetworkAgent"); 2041 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2042 if (nai != null) { 2043 final boolean wasDefault = isDefaultNetwork(nai); 2044 synchronized (mNetworkForNetId) { 2045 mNetworkForNetId.remove(nai.network.netId); 2046 mNetIdInUse.delete(nai.network.netId); 2047 } 2048 // Just in case. 2049 mLegacyTypeTracker.remove(nai, wasDefault); 2050 } 2051 } 2052 } 2053 } 2054 2055 private void handleAsyncChannelDisconnected(Message msg) { 2056 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2057 if (nai != null) { 2058 if (DBG) { 2059 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2060 } 2061 // A network agent has disconnected. 2062 if (nai.created) { 2063 // Tell netd to clean up the configuration for this network 2064 // (routing rules, DNS, etc). 2065 try { 2066 mNetd.removeNetwork(nai.network.netId); 2067 } catch (Exception e) { 2068 loge("Exception removing network: " + e); 2069 } 2070 } 2071 // TODO - if we move the logic to the network agent (have them disconnect 2072 // because they lost all their requests or because their score isn't good) 2073 // then they would disconnect organically, report their new state and then 2074 // disconnect the channel. 2075 if (nai.networkInfo.isConnected()) { 2076 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2077 null, null); 2078 } 2079 final boolean wasDefault = isDefaultNetwork(nai); 2080 if (wasDefault) { 2081 mDefaultInetConditionPublished = 0; 2082 } 2083 notifyIfacesChanged(); 2084 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2085 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2086 mNetworkAgentInfos.remove(msg.replyTo); 2087 updateClat(null, nai.linkProperties, nai); 2088 synchronized (mNetworkForNetId) { 2089 mNetworkForNetId.remove(nai.network.netId); 2090 mNetIdInUse.delete(nai.network.netId); 2091 } 2092 // Since we've lost the network, go through all the requests that 2093 // it was satisfying and see if any other factory can satisfy them. 2094 // TODO: This logic may be better replaced with a call to rematchAllNetworksAndRequests 2095 final ArrayList<NetworkAgentInfo> toActivate = new ArrayList<NetworkAgentInfo>(); 2096 for (int i = 0; i < nai.networkRequests.size(); i++) { 2097 NetworkRequest request = nai.networkRequests.valueAt(i); 2098 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2099 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2100 if (DBG) { 2101 log("Checking for replacement network to handle request " + request ); 2102 } 2103 mNetworkForRequestId.remove(request.requestId); 2104 sendUpdatedScoreToFactories(request, 0); 2105 NetworkAgentInfo alternative = null; 2106 for (NetworkAgentInfo existing : mNetworkAgentInfos.values()) { 2107 if (existing.satisfies(request) && 2108 (alternative == null || 2109 alternative.getCurrentScore() < existing.getCurrentScore())) { 2110 alternative = existing; 2111 } 2112 } 2113 if (alternative != null) { 2114 if (DBG) log(" found replacement in " + alternative.name()); 2115 if (!toActivate.contains(alternative)) { 2116 toActivate.add(alternative); 2117 } 2118 } 2119 } 2120 } 2121 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2122 removeDataActivityTracking(nai); 2123 notifyLockdownVpn(nai); 2124 requestNetworkTransitionWakelock(nai.name()); 2125 } 2126 mLegacyTypeTracker.remove(nai, wasDefault); 2127 for (NetworkAgentInfo networkToActivate : toActivate) { 2128 unlinger(networkToActivate); 2129 rematchNetworkAndRequests(networkToActivate, NascentState.NOT_JUST_VALIDATED, 2130 ReapUnvalidatedNetworks.DONT_REAP); 2131 } 2132 } 2133 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2134 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2135 } 2136 2137 // If this method proves to be too slow then we can maintain a separate 2138 // pendingIntent => NetworkRequestInfo map. 2139 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2140 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2141 Intent intent = pendingIntent.getIntent(); 2142 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2143 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2144 if (existingPendingIntent != null && 2145 existingPendingIntent.getIntent().filterEquals(intent)) { 2146 return entry.getValue(); 2147 } 2148 } 2149 return null; 2150 } 2151 2152 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2153 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2154 2155 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2156 if (existingRequest != null) { // remove the existing request. 2157 if (DBG) log("Replacing " + existingRequest.request + " with " 2158 + nri.request + " because their intents matched."); 2159 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2160 } 2161 handleRegisterNetworkRequest(nri); 2162 } 2163 2164 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2165 mNetworkRequests.put(nri.request, nri); 2166 2167 // TODO: This logic may be better replaced with a call to rematchNetworkAndRequests 2168 2169 // Check for the best currently alive network that satisfies this request 2170 NetworkAgentInfo bestNetwork = null; 2171 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2172 if (DBG) log("handleRegisterNetworkRequest checking " + network.name()); 2173 if (network.satisfies(nri.request)) { 2174 if (DBG) log("apparently satisfied. currentScore=" + network.getCurrentScore()); 2175 if (!nri.isRequest) { 2176 // Not setting bestNetwork here as a listening NetworkRequest may be 2177 // satisfied by multiple Networks. Instead the request is added to 2178 // each satisfying Network and notified about each. 2179 network.addRequest(nri.request); 2180 notifyNetworkCallback(network, nri); 2181 } else if (bestNetwork == null || 2182 bestNetwork.getCurrentScore() < network.getCurrentScore()) { 2183 bestNetwork = network; 2184 } 2185 } 2186 } 2187 if (bestNetwork != null) { 2188 if (DBG) log("using " + bestNetwork.name()); 2189 unlinger(bestNetwork); 2190 bestNetwork.addRequest(nri.request); 2191 mNetworkForRequestId.put(nri.request.requestId, bestNetwork); 2192 notifyNetworkCallback(bestNetwork, nri); 2193 if (nri.request.legacyType != TYPE_NONE) { 2194 mLegacyTypeTracker.add(nri.request.legacyType, bestNetwork); 2195 } 2196 } 2197 2198 if (nri.isRequest) { 2199 if (DBG) log("sending new NetworkRequest to factories"); 2200 final int score = bestNetwork == null ? 0 : bestNetwork.getCurrentScore(); 2201 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2202 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 2203 0, nri.request); 2204 } 2205 } 2206 } 2207 2208 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2209 int callingUid) { 2210 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2211 if (nri != null) { 2212 handleReleaseNetworkRequest(nri.request, callingUid); 2213 } 2214 } 2215 2216 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2217 // For validated Networks this is simply whether it is satsifying any NetworkRequests. 2218 // For unvalidated Networks this is whether it is satsifying any NetworkRequests or 2219 // were it to become validated, would it have a chance of satisfying any NetworkRequests. 2220 private boolean unneeded(NetworkAgentInfo nai) { 2221 if (!nai.created || nai.isVPN()) return false; 2222 boolean unneeded = true; 2223 if (nai.everValidated) { 2224 for (int i = 0; i < nai.networkRequests.size() && unneeded; i++) { 2225 final NetworkRequest nr = nai.networkRequests.valueAt(i); 2226 try { 2227 if (isRequest(nr)) unneeded = false; 2228 } catch (Exception e) { 2229 loge("Request " + nr + " not found in mNetworkRequests."); 2230 loge(" it came from request list of " + nai.name()); 2231 } 2232 } 2233 } else { 2234 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2235 // If this Network is already the highest scoring Network for a request, or if 2236 // there is hope for it to become one if it validated, then it is needed. 2237 if (nri.isRequest && nai.satisfies(nri.request) && 2238 (nai.networkRequests.get(nri.request.requestId) != null || 2239 // Note that this catches two important cases: 2240 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2241 // is currently satisfying the request. This is desirable when 2242 // cellular ends up validating but WiFi does not. 2243 // 2. Unvalidated WiFi will not be reaped when validated cellular 2244 // is currently satsifying the request. This is desirable when 2245 // WiFi ends up validating and out scoring cellular. 2246 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2247 nai.getCurrentScoreAsValidated())) { 2248 unneeded = false; 2249 break; 2250 } 2251 } 2252 } 2253 return unneeded; 2254 } 2255 2256 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2257 NetworkRequestInfo nri = mNetworkRequests.get(request); 2258 if (nri != null) { 2259 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2260 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2261 return; 2262 } 2263 if (DBG) log("releasing NetworkRequest " + request); 2264 nri.unlinkDeathRecipient(); 2265 mNetworkRequests.remove(request); 2266 if (nri.isRequest) { 2267 // Find all networks that are satisfying this request and remove the request 2268 // from their request lists. 2269 // TODO - it's my understanding that for a request there is only a single 2270 // network satisfying it, so this loop is wasteful 2271 boolean wasKept = false; 2272 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2273 if (nai.networkRequests.get(nri.request.requestId) != null) { 2274 nai.networkRequests.remove(nri.request.requestId); 2275 if (DBG) { 2276 log(" Removing from current network " + nai.name() + 2277 ", leaving " + nai.networkRequests.size() + 2278 " requests."); 2279 } 2280 if (unneeded(nai)) { 2281 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2282 teardownUnneededNetwork(nai); 2283 } else { 2284 // suspect there should only be one pass through here 2285 // but if any were kept do the check below 2286 wasKept |= true; 2287 } 2288 } 2289 } 2290 2291 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2292 if (nai != null) { 2293 mNetworkForRequestId.remove(nri.request.requestId); 2294 } 2295 // Maintain the illusion. When this request arrived, we might have pretended 2296 // that a network connected to serve it, even though the network was already 2297 // connected. Now that this request has gone away, we might have to pretend 2298 // that the network disconnected. LegacyTypeTracker will generate that 2299 // phantom disconnect for this type. 2300 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2301 boolean doRemove = true; 2302 if (wasKept) { 2303 // check if any of the remaining requests for this network are for the 2304 // same legacy type - if so, don't remove the nai 2305 for (int i = 0; i < nai.networkRequests.size(); i++) { 2306 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2307 if (otherRequest.legacyType == nri.request.legacyType && 2308 isRequest(otherRequest)) { 2309 if (DBG) log(" still have other legacy request - leaving"); 2310 doRemove = false; 2311 } 2312 } 2313 } 2314 2315 if (doRemove) { 2316 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2317 } 2318 } 2319 2320 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2321 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2322 nri.request); 2323 } 2324 } else { 2325 // listens don't have a singular affectedNetwork. Check all networks to see 2326 // if this listen request applies and remove it. 2327 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2328 nai.networkRequests.remove(nri.request.requestId); 2329 } 2330 } 2331 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2332 } 2333 } 2334 2335 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2336 enforceConnectivityInternalPermission(); 2337 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2338 accept ? 1 : 0, always ? 1: 0, network)); 2339 } 2340 2341 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2342 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2343 " accept=" + accept + " always=" + always); 2344 2345 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2346 if (nai == null) { 2347 // Nothing to do. 2348 return; 2349 } 2350 2351 if (nai.everValidated) { 2352 // The network validated while the dialog box was up. Don't make any changes. There's a 2353 // TODO in the dialog code to make it go away if the network validates; once that's 2354 // implemented, taking action here will be confusing. 2355 return; 2356 } 2357 2358 if (!nai.networkMisc.explicitlySelected) { 2359 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2360 } 2361 2362 if (accept != nai.networkMisc.acceptUnvalidated) { 2363 int oldScore = nai.getCurrentScore(); 2364 nai.networkMisc.acceptUnvalidated = accept; 2365 rematchAllNetworksAndRequests(nai, oldScore); 2366 sendUpdatedScoreToFactories(nai); 2367 } 2368 2369 if (always) { 2370 nai.asyncChannel.sendMessage( 2371 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2372 } 2373 2374 // TODO: should we also disconnect from the network if accept is false? 2375 } 2376 2377 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2378 mHandler.sendMessageDelayed( 2379 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2380 PROMPT_UNVALIDATED_DELAY_MS); 2381 } 2382 2383 private void handlePromptUnvalidated(Network network) { 2384 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2385 2386 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2387 // we haven't already been told to switch to it regardless of whether it validated or not. 2388 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2389 if (nai == null || nai.everValidated || nai.captivePortalDetected || 2390 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2391 return; 2392 } 2393 2394 // TODO: What should we do if we've already switched to this network because we had no 2395 // better option? There are two obvious alternatives. 2396 // 2397 // 1. Decide that there's no point prompting because this is our only usable network. 2398 // However, because we didn't prompt, if later on a validated network comes along, we'll 2399 // either a) silently switch to it - bad if the user wanted to connect to stay on this 2400 // unvalidated network - or b) prompt the user at that later time - bad because the user 2401 // might not understand why they are now being prompted. 2402 // 2403 // 2. Always prompt the user, even if we have no other network to use. The user could then 2404 // try to find an alternative network to join (remember, if we got here, then the user 2405 // selected this network manually). This is bad because the prompt isn't really very 2406 // useful. 2407 // 2408 // For now we do #1, but we can revisit that later. 2409 if (isDefaultNetwork(nai)) { 2410 return; 2411 } 2412 2413 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2414 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, network); 2415 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2416 intent.setClassName("com.android.settings", 2417 "com.android.settings.wifi.WifiNoInternetDialog"); 2418 mContext.startActivityAsUser(intent, UserHandle.CURRENT); 2419 } 2420 2421 private class InternalHandler extends Handler { 2422 public InternalHandler(Looper looper) { 2423 super(looper); 2424 } 2425 2426 @Override 2427 public void handleMessage(Message msg) { 2428 switch (msg.what) { 2429 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2430 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2431 String causedBy = null; 2432 synchronized (ConnectivityService.this) { 2433 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2434 mNetTransitionWakeLock.isHeld()) { 2435 mNetTransitionWakeLock.release(); 2436 causedBy = mNetTransitionWakeLockCausedBy; 2437 } else { 2438 break; 2439 } 2440 } 2441 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2442 log("Failed to find a new network - expiring NetTransition Wakelock"); 2443 } else { 2444 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2445 " cleared because we found a replacement network"); 2446 } 2447 break; 2448 } 2449 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2450 handleDeprecatedGlobalHttpProxy(); 2451 break; 2452 } 2453 case EVENT_SEND_STICKY_BROADCAST_INTENT: { 2454 Intent intent = (Intent)msg.obj; 2455 sendStickyBroadcast(intent); 2456 break; 2457 } 2458 case EVENT_PROXY_HAS_CHANGED: { 2459 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2460 break; 2461 } 2462 case EVENT_REGISTER_NETWORK_FACTORY: { 2463 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2464 break; 2465 } 2466 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2467 handleUnregisterNetworkFactory((Messenger)msg.obj); 2468 break; 2469 } 2470 case EVENT_REGISTER_NETWORK_AGENT: { 2471 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2472 break; 2473 } 2474 case EVENT_REGISTER_NETWORK_REQUEST: 2475 case EVENT_REGISTER_NETWORK_LISTENER: { 2476 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2477 break; 2478 } 2479 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: { 2480 handleRegisterNetworkRequestWithIntent(msg); 2481 break; 2482 } 2483 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2484 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2485 break; 2486 } 2487 case EVENT_RELEASE_NETWORK_REQUEST: { 2488 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2489 break; 2490 } 2491 case EVENT_SET_ACCEPT_UNVALIDATED: { 2492 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2493 break; 2494 } 2495 case EVENT_PROMPT_UNVALIDATED: { 2496 handlePromptUnvalidated((Network) msg.obj); 2497 break; 2498 } 2499 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2500 handleMobileDataAlwaysOn(); 2501 break; 2502 } 2503 case EVENT_SYSTEM_READY: { 2504 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2505 nai.networkMonitor.systemReady = true; 2506 } 2507 break; 2508 } 2509 } 2510 } 2511 } 2512 2513 // javadoc from interface 2514 public int tether(String iface) { 2515 ConnectivityManager.enforceTetherChangePermission(mContext); 2516 if (isTetheringSupported()) { 2517 return mTethering.tether(iface); 2518 } else { 2519 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2520 } 2521 } 2522 2523 // javadoc from interface 2524 public int untether(String iface) { 2525 ConnectivityManager.enforceTetherChangePermission(mContext); 2526 2527 if (isTetheringSupported()) { 2528 return mTethering.untether(iface); 2529 } else { 2530 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2531 } 2532 } 2533 2534 // javadoc from interface 2535 public int getLastTetherError(String iface) { 2536 enforceTetherAccessPermission(); 2537 2538 if (isTetheringSupported()) { 2539 return mTethering.getLastTetherError(iface); 2540 } else { 2541 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2542 } 2543 } 2544 2545 // TODO - proper iface API for selection by property, inspection, etc 2546 public String[] getTetherableUsbRegexs() { 2547 enforceTetherAccessPermission(); 2548 if (isTetheringSupported()) { 2549 return mTethering.getTetherableUsbRegexs(); 2550 } else { 2551 return new String[0]; 2552 } 2553 } 2554 2555 public String[] getTetherableWifiRegexs() { 2556 enforceTetherAccessPermission(); 2557 if (isTetheringSupported()) { 2558 return mTethering.getTetherableWifiRegexs(); 2559 } else { 2560 return new String[0]; 2561 } 2562 } 2563 2564 public String[] getTetherableBluetoothRegexs() { 2565 enforceTetherAccessPermission(); 2566 if (isTetheringSupported()) { 2567 return mTethering.getTetherableBluetoothRegexs(); 2568 } else { 2569 return new String[0]; 2570 } 2571 } 2572 2573 public int setUsbTethering(boolean enable) { 2574 ConnectivityManager.enforceTetherChangePermission(mContext); 2575 if (isTetheringSupported()) { 2576 return mTethering.setUsbTethering(enable); 2577 } else { 2578 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2579 } 2580 } 2581 2582 // TODO - move iface listing, queries, etc to new module 2583 // javadoc from interface 2584 public String[] getTetherableIfaces() { 2585 enforceTetherAccessPermission(); 2586 return mTethering.getTetherableIfaces(); 2587 } 2588 2589 public String[] getTetheredIfaces() { 2590 enforceTetherAccessPermission(); 2591 return mTethering.getTetheredIfaces(); 2592 } 2593 2594 public String[] getTetheringErroredIfaces() { 2595 enforceTetherAccessPermission(); 2596 return mTethering.getErroredIfaces(); 2597 } 2598 2599 public String[] getTetheredDhcpRanges() { 2600 enforceConnectivityInternalPermission(); 2601 return mTethering.getTetheredDhcpRanges(); 2602 } 2603 2604 // if ro.tether.denied = true we default to no tethering 2605 // gservices could set the secure setting to 1 though to enable it on a build where it 2606 // had previously been turned off. 2607 public boolean isTetheringSupported() { 2608 enforceTetherAccessPermission(); 2609 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2610 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2611 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2612 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2613 return tetherEnabledInSettings && ((mTethering.getTetherableUsbRegexs().length != 0 || 2614 mTethering.getTetherableWifiRegexs().length != 0 || 2615 mTethering.getTetherableBluetoothRegexs().length != 0) && 2616 mTethering.getUpstreamIfaceTypes().length != 0); 2617 } 2618 2619 // Called when we lose the default network and have no replacement yet. 2620 // This will automatically be cleared after X seconds or a new default network 2621 // becomes CONNECTED, whichever happens first. The timer is started by the 2622 // first caller and not restarted by subsequent callers. 2623 private void requestNetworkTransitionWakelock(String forWhom) { 2624 int serialNum = 0; 2625 synchronized (this) { 2626 if (mNetTransitionWakeLock.isHeld()) return; 2627 serialNum = ++mNetTransitionWakeLockSerialNumber; 2628 mNetTransitionWakeLock.acquire(); 2629 mNetTransitionWakeLockCausedBy = forWhom; 2630 } 2631 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2632 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2633 mNetTransitionWakeLockTimeout); 2634 return; 2635 } 2636 2637 // 100 percent is full good, 0 is full bad. 2638 public void reportInetCondition(int networkType, int percentage) { 2639 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2640 if (nai == null) return; 2641 reportNetworkConnectivity(nai.network, percentage > 50); 2642 } 2643 2644 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2645 enforceAccessPermission(); 2646 enforceInternetPermission(); 2647 2648 NetworkAgentInfo nai; 2649 if (network == null) { 2650 nai = getDefaultNetwork(); 2651 } else { 2652 nai = getNetworkAgentInfoForNetwork(network); 2653 } 2654 if (nai == null) return; 2655 // Revalidate if the app report does not match our current validated state. 2656 if (hasConnectivity == nai.lastValidated) return; 2657 final int uid = Binder.getCallingUid(); 2658 if (DBG) { 2659 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2660 ") by " + uid); 2661 } 2662 synchronized (nai) { 2663 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2664 // which isn't meant to work on uncreated networks. 2665 if (!nai.created) return; 2666 2667 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2668 2669 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2670 } 2671 } 2672 2673 public void captivePortalAppResponse(Network network, int response, String actionToken) { 2674 if (response == ConnectivityManager.CAPTIVE_PORTAL_APP_RETURN_WANTED_AS_IS) { 2675 enforceConnectivityInternalPermission(); 2676 } 2677 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2678 if (nai == null) return; 2679 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_CAPTIVE_PORTAL_APP_FINISHED, response, 0, 2680 actionToken); 2681 } 2682 2683 public ProxyInfo getDefaultProxy() { 2684 // this information is already available as a world read/writable jvm property 2685 // so this API change wouldn't have a benifit. It also breaks the passing 2686 // of proxy info to all the JVMs. 2687 // enforceAccessPermission(); 2688 synchronized (mProxyLock) { 2689 ProxyInfo ret = mGlobalProxy; 2690 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2691 return ret; 2692 } 2693 } 2694 2695 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2696 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2697 // proxy is null then there is no proxy in place). 2698 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2699 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2700 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2701 proxy = null; 2702 } 2703 return proxy; 2704 } 2705 2706 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2707 // better for determining if a new proxy broadcast is necessary: 2708 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2709 // avoid unnecessary broadcasts. 2710 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2711 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2712 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2713 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2714 // all set. 2715 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2716 a = canonicalizeProxyInfo(a); 2717 b = canonicalizeProxyInfo(b); 2718 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2719 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2720 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2721 } 2722 2723 public void setGlobalProxy(ProxyInfo proxyProperties) { 2724 enforceConnectivityInternalPermission(); 2725 2726 synchronized (mProxyLock) { 2727 if (proxyProperties == mGlobalProxy) return; 2728 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2729 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2730 2731 String host = ""; 2732 int port = 0; 2733 String exclList = ""; 2734 String pacFileUrl = ""; 2735 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2736 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2737 if (!proxyProperties.isValid()) { 2738 if (DBG) 2739 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2740 return; 2741 } 2742 mGlobalProxy = new ProxyInfo(proxyProperties); 2743 host = mGlobalProxy.getHost(); 2744 port = mGlobalProxy.getPort(); 2745 exclList = mGlobalProxy.getExclusionListAsString(); 2746 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2747 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2748 } 2749 } else { 2750 mGlobalProxy = null; 2751 } 2752 ContentResolver res = mContext.getContentResolver(); 2753 final long token = Binder.clearCallingIdentity(); 2754 try { 2755 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2756 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2757 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2758 exclList); 2759 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2760 } finally { 2761 Binder.restoreCallingIdentity(token); 2762 } 2763 2764 if (mGlobalProxy == null) { 2765 proxyProperties = mDefaultProxy; 2766 } 2767 sendProxyBroadcast(proxyProperties); 2768 } 2769 } 2770 2771 private void loadGlobalProxy() { 2772 ContentResolver res = mContext.getContentResolver(); 2773 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2774 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2775 String exclList = Settings.Global.getString(res, 2776 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2777 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2778 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2779 ProxyInfo proxyProperties; 2780 if (!TextUtils.isEmpty(pacFileUrl)) { 2781 proxyProperties = new ProxyInfo(pacFileUrl); 2782 } else { 2783 proxyProperties = new ProxyInfo(host, port, exclList); 2784 } 2785 if (!proxyProperties.isValid()) { 2786 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2787 return; 2788 } 2789 2790 synchronized (mProxyLock) { 2791 mGlobalProxy = proxyProperties; 2792 } 2793 } 2794 } 2795 2796 public ProxyInfo getGlobalProxy() { 2797 // this information is already available as a world read/writable jvm property 2798 // so this API change wouldn't have a benifit. It also breaks the passing 2799 // of proxy info to all the JVMs. 2800 // enforceAccessPermission(); 2801 synchronized (mProxyLock) { 2802 return mGlobalProxy; 2803 } 2804 } 2805 2806 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2807 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2808 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2809 proxy = null; 2810 } 2811 synchronized (mProxyLock) { 2812 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2813 if (mDefaultProxy == proxy) return; // catches repeated nulls 2814 if (proxy != null && !proxy.isValid()) { 2815 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2816 return; 2817 } 2818 2819 // This call could be coming from the PacManager, containing the port of the local 2820 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2821 // global (to get the correct local port), and send a broadcast. 2822 // TODO: Switch PacManager to have its own message to send back rather than 2823 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2824 if ((mGlobalProxy != null) && (proxy != null) 2825 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2826 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2827 mGlobalProxy = proxy; 2828 sendProxyBroadcast(mGlobalProxy); 2829 return; 2830 } 2831 mDefaultProxy = proxy; 2832 2833 if (mGlobalProxy != null) return; 2834 if (!mDefaultProxyDisabled) { 2835 sendProxyBroadcast(proxy); 2836 } 2837 } 2838 } 2839 2840 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2841 // This method gets called when any network changes proxy, but the broadcast only ever contains 2842 // the default proxy (even if it hasn't changed). 2843 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2844 // world where an app might be bound to a non-default network. 2845 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2846 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2847 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2848 2849 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2850 sendProxyBroadcast(getDefaultProxy()); 2851 } 2852 } 2853 2854 private void handleDeprecatedGlobalHttpProxy() { 2855 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2856 Settings.Global.HTTP_PROXY); 2857 if (!TextUtils.isEmpty(proxy)) { 2858 String data[] = proxy.split(":"); 2859 if (data.length == 0) { 2860 return; 2861 } 2862 2863 String proxyHost = data[0]; 2864 int proxyPort = 8080; 2865 if (data.length > 1) { 2866 try { 2867 proxyPort = Integer.parseInt(data[1]); 2868 } catch (NumberFormatException e) { 2869 return; 2870 } 2871 } 2872 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2873 setGlobalProxy(p); 2874 } 2875 } 2876 2877 private void sendProxyBroadcast(ProxyInfo proxy) { 2878 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2879 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2880 if (DBG) log("sending Proxy Broadcast for " + proxy); 2881 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2882 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2883 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2884 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2885 final long ident = Binder.clearCallingIdentity(); 2886 try { 2887 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2888 } finally { 2889 Binder.restoreCallingIdentity(ident); 2890 } 2891 } 2892 2893 private static class SettingsObserver extends ContentObserver { 2894 final private HashMap<Uri, Integer> mUriEventMap; 2895 final private Context mContext; 2896 final private Handler mHandler; 2897 2898 SettingsObserver(Context context, Handler handler) { 2899 super(null); 2900 mUriEventMap = new HashMap<Uri, Integer>(); 2901 mContext = context; 2902 mHandler = handler; 2903 } 2904 2905 void observe(Uri uri, int what) { 2906 mUriEventMap.put(uri, what); 2907 final ContentResolver resolver = mContext.getContentResolver(); 2908 resolver.registerContentObserver(uri, false, this); 2909 } 2910 2911 @Override 2912 public void onChange(boolean selfChange) { 2913 Slog.wtf(TAG, "Should never be reached."); 2914 } 2915 2916 @Override 2917 public void onChange(boolean selfChange, Uri uri) { 2918 final Integer what = mUriEventMap.get(uri); 2919 if (what != null) { 2920 mHandler.obtainMessage(what.intValue()).sendToTarget(); 2921 } else { 2922 loge("No matching event to send for URI=" + uri); 2923 } 2924 } 2925 } 2926 2927 private static void log(String s) { 2928 Slog.d(TAG, s); 2929 } 2930 2931 private static void loge(String s) { 2932 Slog.e(TAG, s); 2933 } 2934 2935 private static <T> T checkNotNull(T value, String message) { 2936 if (value == null) { 2937 throw new NullPointerException(message); 2938 } 2939 return value; 2940 } 2941 2942 /** 2943 * Prepare for a VPN application. 2944 * Permissions are checked in Vpn class. 2945 * @hide 2946 */ 2947 @Override 2948 public boolean prepareVpn(String oldPackage, String newPackage) { 2949 throwIfLockdownEnabled(); 2950 int user = UserHandle.getUserId(Binder.getCallingUid()); 2951 synchronized(mVpns) { 2952 return mVpns.get(user).prepare(oldPackage, newPackage); 2953 } 2954 } 2955 2956 /** 2957 * Set whether the current VPN package has the ability to launch VPNs without 2958 * user intervention. This method is used by system-privileged apps. 2959 * Permissions are checked in Vpn class. 2960 * @hide 2961 */ 2962 @Override 2963 public void setVpnPackageAuthorization(boolean authorized) { 2964 int user = UserHandle.getUserId(Binder.getCallingUid()); 2965 synchronized(mVpns) { 2966 mVpns.get(user).setPackageAuthorization(authorized); 2967 } 2968 } 2969 2970 /** 2971 * Configure a TUN interface and return its file descriptor. Parameters 2972 * are encoded and opaque to this class. This method is used by VpnBuilder 2973 * and not available in ConnectivityManager. Permissions are checked in 2974 * Vpn class. 2975 * @hide 2976 */ 2977 @Override 2978 public ParcelFileDescriptor establishVpn(VpnConfig config) { 2979 throwIfLockdownEnabled(); 2980 int user = UserHandle.getUserId(Binder.getCallingUid()); 2981 synchronized(mVpns) { 2982 return mVpns.get(user).establish(config); 2983 } 2984 } 2985 2986 /** 2987 * Start legacy VPN, controlling native daemons as needed. Creates a 2988 * secondary thread to perform connection work, returning quickly. 2989 */ 2990 @Override 2991 public void startLegacyVpn(VpnProfile profile) { 2992 throwIfLockdownEnabled(); 2993 final LinkProperties egress = getActiveLinkProperties(); 2994 if (egress == null) { 2995 throw new IllegalStateException("Missing active network connection"); 2996 } 2997 int user = UserHandle.getUserId(Binder.getCallingUid()); 2998 synchronized(mVpns) { 2999 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3000 } 3001 } 3002 3003 /** 3004 * Return the information of the ongoing legacy VPN. This method is used 3005 * by VpnSettings and not available in ConnectivityManager. Permissions 3006 * are checked in Vpn class. 3007 */ 3008 @Override 3009 public LegacyVpnInfo getLegacyVpnInfo() { 3010 throwIfLockdownEnabled(); 3011 int user = UserHandle.getUserId(Binder.getCallingUid()); 3012 synchronized(mVpns) { 3013 return mVpns.get(user).getLegacyVpnInfo(); 3014 } 3015 } 3016 3017 /** 3018 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3019 * and not available in ConnectivityManager. 3020 */ 3021 @Override 3022 public VpnInfo[] getAllVpnInfo() { 3023 enforceConnectivityInternalPermission(); 3024 if (mLockdownEnabled) { 3025 return new VpnInfo[0]; 3026 } 3027 3028 synchronized(mVpns) { 3029 List<VpnInfo> infoList = new ArrayList<>(); 3030 for (int i = 0; i < mVpns.size(); i++) { 3031 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3032 if (info != null) { 3033 infoList.add(info); 3034 } 3035 } 3036 return infoList.toArray(new VpnInfo[infoList.size()]); 3037 } 3038 } 3039 3040 /** 3041 * @return VPN information for accounting, or null if we can't retrieve all required 3042 * information, e.g primary underlying iface. 3043 */ 3044 @Nullable 3045 private VpnInfo createVpnInfo(Vpn vpn) { 3046 VpnInfo info = vpn.getVpnInfo(); 3047 if (info == null) { 3048 return null; 3049 } 3050 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3051 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3052 // the underlyingNetworks list. 3053 if (underlyingNetworks == null) { 3054 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3055 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3056 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3057 } 3058 } else if (underlyingNetworks.length > 0) { 3059 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3060 if (linkProperties != null) { 3061 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3062 } 3063 } 3064 return info.primaryUnderlyingIface == null ? null : info; 3065 } 3066 3067 /** 3068 * Returns the information of the ongoing VPN. This method is used by VpnDialogs and 3069 * not available in ConnectivityManager. 3070 * Permissions are checked in Vpn class. 3071 * @hide 3072 */ 3073 @Override 3074 public VpnConfig getVpnConfig() { 3075 int user = UserHandle.getUserId(Binder.getCallingUid()); 3076 synchronized(mVpns) { 3077 return mVpns.get(user).getVpnConfig(); 3078 } 3079 } 3080 3081 @Override 3082 public boolean updateLockdownVpn() { 3083 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3084 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3085 return false; 3086 } 3087 3088 // Tear down existing lockdown if profile was removed 3089 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3090 if (mLockdownEnabled) { 3091 if (!mKeyStore.isUnlocked()) { 3092 Slog.w(TAG, "KeyStore locked; unable to create LockdownTracker"); 3093 return false; 3094 } 3095 3096 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3097 final VpnProfile profile = VpnProfile.decode( 3098 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3099 int user = UserHandle.getUserId(Binder.getCallingUid()); 3100 synchronized(mVpns) { 3101 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, mVpns.get(user), 3102 profile)); 3103 } 3104 } else { 3105 setLockdownTracker(null); 3106 } 3107 3108 return true; 3109 } 3110 3111 /** 3112 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3113 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3114 */ 3115 private void setLockdownTracker(LockdownVpnTracker tracker) { 3116 // Shutdown any existing tracker 3117 final LockdownVpnTracker existing = mLockdownTracker; 3118 mLockdownTracker = null; 3119 if (existing != null) { 3120 existing.shutdown(); 3121 } 3122 3123 try { 3124 if (tracker != null) { 3125 mNetd.setFirewallEnabled(true); 3126 mNetd.setFirewallInterfaceRule("lo", true); 3127 mLockdownTracker = tracker; 3128 mLockdownTracker.init(); 3129 } else { 3130 mNetd.setFirewallEnabled(false); 3131 } 3132 } catch (RemoteException e) { 3133 // ignored; NMS lives inside system_server 3134 } 3135 } 3136 3137 private void throwIfLockdownEnabled() { 3138 if (mLockdownEnabled) { 3139 throw new IllegalStateException("Unavailable in lockdown mode"); 3140 } 3141 } 3142 3143 @Override 3144 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3145 // TODO: Remove? Any reason to trigger a provisioning check? 3146 return -1; 3147 } 3148 3149 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3150 private volatile boolean mIsNotificationVisible = false; 3151 3152 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3153 if (DBG) { 3154 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3155 + " action=" + action); 3156 } 3157 Intent intent = new Intent(action); 3158 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3159 // Concatenate the range of types onto the range of NetIDs. 3160 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3161 setProvNotificationVisibleIntent(visible, id, networkType, null, pendingIntent); 3162 } 3163 3164 /** 3165 * Show or hide network provisioning notificaitons. 3166 * 3167 * @param id an identifier that uniquely identifies this notification. This must match 3168 * between show and hide calls. We use the NetID value but for legacy callers 3169 * we concatenate the range of types with the range of NetIDs. 3170 */ 3171 private void setProvNotificationVisibleIntent(boolean visible, int id, int networkType, 3172 String extraInfo, PendingIntent intent) { 3173 if (DBG) { 3174 log("setProvNotificationVisibleIntent: E visible=" + visible + " networkType=" + 3175 networkType + " extraInfo=" + extraInfo); 3176 } 3177 3178 Resources r = Resources.getSystem(); 3179 NotificationManager notificationManager = (NotificationManager) mContext 3180 .getSystemService(Context.NOTIFICATION_SERVICE); 3181 3182 if (visible) { 3183 CharSequence title; 3184 CharSequence details; 3185 int icon; 3186 Notification notification = new Notification(); 3187 switch (networkType) { 3188 case ConnectivityManager.TYPE_WIFI: 3189 title = r.getString(R.string.wifi_available_sign_in, 0); 3190 details = r.getString(R.string.network_available_sign_in_detailed, 3191 extraInfo); 3192 icon = R.drawable.stat_notify_wifi_in_range; 3193 break; 3194 case ConnectivityManager.TYPE_MOBILE: 3195 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3196 title = r.getString(R.string.network_available_sign_in, 0); 3197 // TODO: Change this to pull from NetworkInfo once a printable 3198 // name has been added to it 3199 details = mTelephonyManager.getNetworkOperatorName(); 3200 icon = R.drawable.stat_notify_rssi_in_range; 3201 break; 3202 default: 3203 title = r.getString(R.string.network_available_sign_in, 0); 3204 details = r.getString(R.string.network_available_sign_in_detailed, 3205 extraInfo); 3206 icon = R.drawable.stat_notify_rssi_in_range; 3207 break; 3208 } 3209 3210 notification.when = 0; 3211 notification.icon = icon; 3212 notification.flags = Notification.FLAG_AUTO_CANCEL; 3213 notification.tickerText = title; 3214 notification.color = mContext.getColor( 3215 com.android.internal.R.color.system_notification_accent_color); 3216 notification.setLatestEventInfo(mContext, title, details, notification.contentIntent); 3217 notification.contentIntent = intent; 3218 3219 try { 3220 notificationManager.notify(NOTIFICATION_ID, id, notification); 3221 } catch (NullPointerException npe) { 3222 loge("setNotificaitionVisible: visible notificationManager npe=" + npe); 3223 npe.printStackTrace(); 3224 } 3225 } else { 3226 try { 3227 notificationManager.cancel(NOTIFICATION_ID, id); 3228 } catch (NullPointerException npe) { 3229 loge("setNotificaitionVisible: cancel notificationManager npe=" + npe); 3230 npe.printStackTrace(); 3231 } 3232 } 3233 mIsNotificationVisible = visible; 3234 } 3235 3236 /** Location to an updatable file listing carrier provisioning urls. 3237 * An example: 3238 * 3239 * <?xml version="1.0" encoding="utf-8"?> 3240 * <provisioningUrls> 3241 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3242 * <redirectedUrl mcc="310" mnc="4">http://www.google.com</redirectedUrl> 3243 * </provisioningUrls> 3244 */ 3245 private static final String PROVISIONING_URL_PATH = 3246 "/data/misc/radio/provisioning_urls.xml"; 3247 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3248 3249 /** XML tag for root element. */ 3250 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3251 /** XML tag for individual url */ 3252 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3253 /** XML tag for redirected url */ 3254 private static final String TAG_REDIRECTED_URL = "redirectedUrl"; 3255 /** XML attribute for mcc */ 3256 private static final String ATTR_MCC = "mcc"; 3257 /** XML attribute for mnc */ 3258 private static final String ATTR_MNC = "mnc"; 3259 3260 private static final int REDIRECTED_PROVISIONING = 1; 3261 private static final int PROVISIONING = 2; 3262 3263 private String getProvisioningUrlBaseFromFile(int type) { 3264 FileReader fileReader = null; 3265 XmlPullParser parser = null; 3266 Configuration config = mContext.getResources().getConfiguration(); 3267 String tagType; 3268 3269 switch (type) { 3270 case PROVISIONING: 3271 tagType = TAG_PROVISIONING_URL; 3272 break; 3273 case REDIRECTED_PROVISIONING: 3274 tagType = TAG_REDIRECTED_URL; 3275 break; 3276 default: 3277 throw new RuntimeException("getProvisioningUrlBaseFromFile: Unexpected parameter " + 3278 type); 3279 } 3280 3281 try { 3282 fileReader = new FileReader(mProvisioningUrlFile); 3283 parser = Xml.newPullParser(); 3284 parser.setInput(fileReader); 3285 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3286 3287 while (true) { 3288 XmlUtils.nextElement(parser); 3289 3290 String element = parser.getName(); 3291 if (element == null) break; 3292 3293 if (element.equals(tagType)) { 3294 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3295 try { 3296 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3297 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3298 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3299 parser.next(); 3300 if (parser.getEventType() == XmlPullParser.TEXT) { 3301 return parser.getText(); 3302 } 3303 } 3304 } 3305 } catch (NumberFormatException e) { 3306 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3307 } 3308 } 3309 } 3310 return null; 3311 } catch (FileNotFoundException e) { 3312 loge("Carrier Provisioning Urls file not found"); 3313 } catch (XmlPullParserException e) { 3314 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3315 } catch (IOException e) { 3316 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3317 } finally { 3318 if (fileReader != null) { 3319 try { 3320 fileReader.close(); 3321 } catch (IOException e) {} 3322 } 3323 } 3324 return null; 3325 } 3326 3327 @Override 3328 public String getMobileRedirectedProvisioningUrl() { 3329 enforceConnectivityInternalPermission(); 3330 String url = getProvisioningUrlBaseFromFile(REDIRECTED_PROVISIONING); 3331 if (TextUtils.isEmpty(url)) { 3332 url = mContext.getResources().getString(R.string.mobile_redirected_provisioning_url); 3333 } 3334 return url; 3335 } 3336 3337 @Override 3338 public String getMobileProvisioningUrl() { 3339 enforceConnectivityInternalPermission(); 3340 String url = getProvisioningUrlBaseFromFile(PROVISIONING); 3341 if (TextUtils.isEmpty(url)) { 3342 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3343 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3344 } else { 3345 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3346 } 3347 // populate the iccid, imei and phone number in the provisioning url. 3348 if (!TextUtils.isEmpty(url)) { 3349 String phoneNumber = mTelephonyManager.getLine1Number(); 3350 if (TextUtils.isEmpty(phoneNumber)) { 3351 phoneNumber = "0000000000"; 3352 } 3353 url = String.format(url, 3354 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3355 mTelephonyManager.getDeviceId() /* IMEI */, 3356 phoneNumber /* Phone numer */); 3357 } 3358 3359 return url; 3360 } 3361 3362 @Override 3363 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3364 String action) { 3365 enforceConnectivityInternalPermission(); 3366 final long ident = Binder.clearCallingIdentity(); 3367 try { 3368 setProvNotificationVisible(visible, networkType, action); 3369 } finally { 3370 Binder.restoreCallingIdentity(ident); 3371 } 3372 } 3373 3374 @Override 3375 public void setAirplaneMode(boolean enable) { 3376 enforceConnectivityInternalPermission(); 3377 final long ident = Binder.clearCallingIdentity(); 3378 try { 3379 final ContentResolver cr = mContext.getContentResolver(); 3380 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3381 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3382 intent.putExtra("state", enable); 3383 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3384 } finally { 3385 Binder.restoreCallingIdentity(ident); 3386 } 3387 } 3388 3389 private void onUserStart(int userId) { 3390 synchronized(mVpns) { 3391 Vpn userVpn = mVpns.get(userId); 3392 if (userVpn != null) { 3393 loge("Starting user already has a VPN"); 3394 return; 3395 } 3396 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3397 mVpns.put(userId, userVpn); 3398 } 3399 } 3400 3401 private void onUserStop(int userId) { 3402 synchronized(mVpns) { 3403 Vpn userVpn = mVpns.get(userId); 3404 if (userVpn == null) { 3405 loge("Stopping user has no VPN"); 3406 return; 3407 } 3408 mVpns.delete(userId); 3409 } 3410 } 3411 3412 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3413 @Override 3414 public void onReceive(Context context, Intent intent) { 3415 final String action = intent.getAction(); 3416 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3417 if (userId == UserHandle.USER_NULL) return; 3418 3419 if (Intent.ACTION_USER_STARTING.equals(action)) { 3420 onUserStart(userId); 3421 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3422 onUserStop(userId); 3423 } 3424 } 3425 }; 3426 3427 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3428 new HashMap<Messenger, NetworkFactoryInfo>(); 3429 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3430 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3431 3432 private static class NetworkFactoryInfo { 3433 public final String name; 3434 public final Messenger messenger; 3435 public final AsyncChannel asyncChannel; 3436 3437 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3438 this.name = name; 3439 this.messenger = messenger; 3440 this.asyncChannel = asyncChannel; 3441 } 3442 } 3443 3444 /** 3445 * Tracks info about the requester. 3446 * Also used to notice when the calling process dies so we can self-expire 3447 */ 3448 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3449 static final boolean REQUEST = true; 3450 static final boolean LISTEN = false; 3451 3452 final NetworkRequest request; 3453 final PendingIntent mPendingIntent; 3454 boolean mPendingIntentSent; 3455 private final IBinder mBinder; 3456 final int mPid; 3457 final int mUid; 3458 final Messenger messenger; 3459 final boolean isRequest; 3460 3461 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, boolean isRequest) { 3462 request = r; 3463 mPendingIntent = pi; 3464 messenger = null; 3465 mBinder = null; 3466 mPid = getCallingPid(); 3467 mUid = getCallingUid(); 3468 this.isRequest = isRequest; 3469 } 3470 3471 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, boolean isRequest) { 3472 super(); 3473 messenger = m; 3474 request = r; 3475 mBinder = binder; 3476 mPid = getCallingPid(); 3477 mUid = getCallingUid(); 3478 this.isRequest = isRequest; 3479 mPendingIntent = null; 3480 3481 try { 3482 mBinder.linkToDeath(this, 0); 3483 } catch (RemoteException e) { 3484 binderDied(); 3485 } 3486 } 3487 3488 void unlinkDeathRecipient() { 3489 if (mBinder != null) { 3490 mBinder.unlinkToDeath(this, 0); 3491 } 3492 } 3493 3494 public void binderDied() { 3495 log("ConnectivityService NetworkRequestInfo binderDied(" + 3496 request + ", " + mBinder + ")"); 3497 releaseNetworkRequest(request); 3498 } 3499 3500 public String toString() { 3501 return (isRequest ? "Request" : "Listen") + " from uid/pid:" + mUid + "/" + 3502 mPid + " for " + request + 3503 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3504 } 3505 } 3506 3507 @Override 3508 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3509 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3510 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3511 enforceNetworkRequestPermissions(networkCapabilities); 3512 enforceMeteredApnPolicy(networkCapabilities); 3513 3514 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3515 throw new IllegalArgumentException("Bad timeout specified"); 3516 } 3517 3518 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3519 nextNetworkRequestId()); 3520 if (DBG) log("requestNetwork for " + networkRequest); 3521 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3522 NetworkRequestInfo.REQUEST); 3523 3524 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3525 if (timeoutMs > 0) { 3526 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3527 nri), timeoutMs); 3528 } 3529 return networkRequest; 3530 } 3531 3532 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3533 if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED) 3534 == false) { 3535 enforceConnectivityInternalPermission(); 3536 } else { 3537 enforceChangePermission(); 3538 } 3539 } 3540 3541 @Override 3542 public boolean requestBandwidthUpdate(Network network) { 3543 enforceAccessPermission(); 3544 NetworkAgentInfo nai = null; 3545 if (network == null) { 3546 return false; 3547 } 3548 synchronized (mNetworkForNetId) { 3549 nai = mNetworkForNetId.get(network.netId); 3550 } 3551 if (nai != null) { 3552 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3553 return true; 3554 } 3555 return false; 3556 } 3557 3558 3559 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3560 // if UID is restricted, don't allow them to bring up metered APNs 3561 if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED) 3562 == false) { 3563 final int uidRules; 3564 final int uid = Binder.getCallingUid(); 3565 synchronized(mRulesLock) { 3566 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3567 } 3568 if ((uidRules & (RULE_REJECT_METERED | RULE_REJECT_ALL)) != 0) { 3569 // we could silently fail or we can filter the available nets to only give 3570 // them those they have access to. Chose the more useful 3571 networkCapabilities.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED); 3572 } 3573 } 3574 } 3575 3576 @Override 3577 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3578 PendingIntent operation) { 3579 checkNotNull(operation, "PendingIntent cannot be null."); 3580 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3581 enforceNetworkRequestPermissions(networkCapabilities); 3582 enforceMeteredApnPolicy(networkCapabilities); 3583 3584 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3585 nextNetworkRequestId()); 3586 if (DBG) log("pendingRequest for " + networkRequest + " to trigger " + operation); 3587 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3588 NetworkRequestInfo.REQUEST); 3589 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3590 nri)); 3591 return networkRequest; 3592 } 3593 3594 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3595 mHandler.sendMessageDelayed( 3596 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3597 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3598 } 3599 3600 @Override 3601 public void releasePendingNetworkRequest(PendingIntent operation) { 3602 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3603 getCallingUid(), 0, operation)); 3604 } 3605 3606 // In order to implement the compatibility measure for pre-M apps that call 3607 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 3608 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 3609 // This ensures it has permission to do so. 3610 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 3611 if (nc == null) { 3612 return false; 3613 } 3614 int[] transportTypes = nc.getTransportTypes(); 3615 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 3616 return false; 3617 } 3618 try { 3619 mContext.enforceCallingOrSelfPermission( 3620 android.Manifest.permission.ACCESS_WIFI_STATE, 3621 "ConnectivityService"); 3622 } catch (SecurityException e) { 3623 return false; 3624 } 3625 return true; 3626 } 3627 3628 @Override 3629 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 3630 Messenger messenger, IBinder binder) { 3631 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3632 enforceAccessPermission(); 3633 } 3634 3635 NetworkRequest networkRequest = new NetworkRequest(new NetworkCapabilities( 3636 networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3637 if (DBG) log("listenForNetwork for " + networkRequest); 3638 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3639 NetworkRequestInfo.LISTEN); 3640 3641 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3642 return networkRequest; 3643 } 3644 3645 @Override 3646 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 3647 PendingIntent operation) { 3648 } 3649 3650 @Override 3651 public void releaseNetworkRequest(NetworkRequest networkRequest) { 3652 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 3653 0, networkRequest)); 3654 } 3655 3656 @Override 3657 public void registerNetworkFactory(Messenger messenger, String name) { 3658 enforceConnectivityInternalPermission(); 3659 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 3660 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 3661 } 3662 3663 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 3664 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 3665 mNetworkFactoryInfos.put(nfi.messenger, nfi); 3666 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 3667 } 3668 3669 @Override 3670 public void unregisterNetworkFactory(Messenger messenger) { 3671 enforceConnectivityInternalPermission(); 3672 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 3673 } 3674 3675 private void handleUnregisterNetworkFactory(Messenger messenger) { 3676 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 3677 if (nfi == null) { 3678 loge("Failed to find Messenger in unregisterNetworkFactory"); 3679 return; 3680 } 3681 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 3682 } 3683 3684 /** 3685 * NetworkAgentInfo supporting a request by requestId. 3686 * These have already been vetted (their Capabilities satisfy the request) 3687 * and the are the highest scored network available. 3688 * the are keyed off the Requests requestId. 3689 */ 3690 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 3691 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 3692 new SparseArray<NetworkAgentInfo>(); 3693 3694 // NOTE: Accessed on multiple threads, must be synchronized on itself. 3695 @GuardedBy("mNetworkForNetId") 3696 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 3697 new SparseArray<NetworkAgentInfo>(); 3698 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 3699 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 3700 // there may not be a strict 1:1 correlation between the two. 3701 @GuardedBy("mNetworkForNetId") 3702 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 3703 3704 // NetworkAgentInfo keyed off its connecting messenger 3705 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 3706 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 3707 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 3708 new HashMap<Messenger, NetworkAgentInfo>(); 3709 3710 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 3711 private final NetworkRequest mDefaultRequest; 3712 3713 // Request used to optionally keep mobile data active even when higher 3714 // priority networks like Wi-Fi are active. 3715 private final NetworkRequest mDefaultMobileDataRequest; 3716 3717 private NetworkAgentInfo getDefaultNetwork() { 3718 return mNetworkForRequestId.get(mDefaultRequest.requestId); 3719 } 3720 3721 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 3722 return nai == getDefaultNetwork(); 3723 } 3724 3725 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 3726 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 3727 int currentScore, NetworkMisc networkMisc) { 3728 enforceConnectivityInternalPermission(); 3729 3730 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 3731 // satisfies mDefaultRequest. 3732 NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 3733 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 3734 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 3735 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest); 3736 synchronized (this) { 3737 nai.networkMonitor.systemReady = mSystemReady; 3738 } 3739 if (DBG) log("registerNetworkAgent " + nai); 3740 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 3741 return nai.network.netId; 3742 } 3743 3744 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 3745 if (VDBG) log("Got NetworkAgent Messenger"); 3746 mNetworkAgentInfos.put(na.messenger, na); 3747 synchronized (mNetworkForNetId) { 3748 mNetworkForNetId.put(na.network.netId, na); 3749 } 3750 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 3751 NetworkInfo networkInfo = na.networkInfo; 3752 na.networkInfo = null; 3753 updateNetworkInfo(na, networkInfo); 3754 } 3755 3756 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 3757 LinkProperties newLp = networkAgent.linkProperties; 3758 int netId = networkAgent.network.netId; 3759 3760 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 3761 // we do anything else, make sure its LinkProperties are accurate. 3762 if (networkAgent.clatd != null) { 3763 networkAgent.clatd.fixupLinkProperties(oldLp); 3764 } 3765 3766 updateInterfaces(newLp, oldLp, netId); 3767 updateMtu(newLp, oldLp); 3768 // TODO - figure out what to do for clat 3769// for (LinkProperties lp : newLp.getStackedLinks()) { 3770// updateMtu(lp, null); 3771// } 3772 updateTcpBufferSizes(networkAgent); 3773 3774 // TODO: deprecate and remove mDefaultDns when we can do so safely. 3775 // For now, use it only when the network has Internet access. http://b/18327075 3776 final boolean useDefaultDns = networkAgent.networkCapabilities.hasCapability( 3777 NetworkCapabilities.NET_CAPABILITY_INTERNET); 3778 final boolean flushDns = updateRoutes(newLp, oldLp, netId); 3779 updateDnses(newLp, oldLp, netId, flushDns, useDefaultDns); 3780 3781 updateClat(newLp, oldLp, networkAgent); 3782 if (isDefaultNetwork(networkAgent)) { 3783 handleApplyDefaultProxy(newLp.getHttpProxy()); 3784 } else { 3785 updateProxy(newLp, oldLp, networkAgent); 3786 } 3787 // TODO - move this check to cover the whole function 3788 if (!Objects.equals(newLp, oldLp)) { 3789 notifyIfacesChanged(); 3790 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 3791 } 3792 } 3793 3794 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3795 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 3796 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 3797 3798 if (!wasRunningClat && shouldRunClat) { 3799 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 3800 nai.clatd.start(); 3801 } else if (wasRunningClat && !shouldRunClat) { 3802 nai.clatd.stop(); 3803 } 3804 } 3805 3806 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 3807 CompareResult<String> interfaceDiff = new CompareResult<String>(); 3808 if (oldLp != null) { 3809 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 3810 } else if (newLp != null) { 3811 interfaceDiff.added = newLp.getAllInterfaceNames(); 3812 } 3813 for (String iface : interfaceDiff.added) { 3814 try { 3815 if (DBG) log("Adding iface " + iface + " to network " + netId); 3816 mNetd.addInterfaceToNetwork(iface, netId); 3817 } catch (Exception e) { 3818 loge("Exception adding interface: " + e); 3819 } 3820 } 3821 for (String iface : interfaceDiff.removed) { 3822 try { 3823 if (DBG) log("Removing iface " + iface + " from network " + netId); 3824 mNetd.removeInterfaceFromNetwork(iface, netId); 3825 } catch (Exception e) { 3826 loge("Exception removing interface: " + e); 3827 } 3828 } 3829 } 3830 3831 /** 3832 * Have netd update routes from oldLp to newLp. 3833 * @return true if routes changed between oldLp and newLp 3834 */ 3835 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 3836 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 3837 if (oldLp != null) { 3838 routeDiff = oldLp.compareAllRoutes(newLp); 3839 } else if (newLp != null) { 3840 routeDiff.added = newLp.getAllRoutes(); 3841 } 3842 3843 // add routes before removing old in case it helps with continuous connectivity 3844 3845 // do this twice, adding non-nexthop routes first, then routes they are dependent on 3846 for (RouteInfo route : routeDiff.added) { 3847 if (route.hasGateway()) continue; 3848 if (DBG) log("Adding Route [" + route + "] to network " + netId); 3849 try { 3850 mNetd.addRoute(netId, route); 3851 } catch (Exception e) { 3852 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 3853 loge("Exception in addRoute for non-gateway: " + e); 3854 } 3855 } 3856 } 3857 for (RouteInfo route : routeDiff.added) { 3858 if (route.hasGateway() == false) continue; 3859 if (DBG) log("Adding Route [" + route + "] to network " + netId); 3860 try { 3861 mNetd.addRoute(netId, route); 3862 } catch (Exception e) { 3863 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 3864 loge("Exception in addRoute for gateway: " + e); 3865 } 3866 } 3867 } 3868 3869 for (RouteInfo route : routeDiff.removed) { 3870 if (DBG) log("Removing Route [" + route + "] from network " + netId); 3871 try { 3872 mNetd.removeRoute(netId, route); 3873 } catch (Exception e) { 3874 loge("Exception in removeRoute: " + e); 3875 } 3876 } 3877 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 3878 } 3879 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId, 3880 boolean flush, boolean useDefaultDns) { 3881 if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) { 3882 Collection<InetAddress> dnses = newLp.getDnsServers(); 3883 if (dnses.size() == 0 && mDefaultDns != null && useDefaultDns) { 3884 dnses = new ArrayList(); 3885 dnses.add(mDefaultDns); 3886 if (DBG) { 3887 loge("no dns provided for netId " + netId + ", so using defaults"); 3888 } 3889 } 3890 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 3891 try { 3892 mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses), 3893 newLp.getDomains()); 3894 } catch (Exception e) { 3895 loge("Exception in setDnsServersForNetwork: " + e); 3896 } 3897 NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId); 3898 if (defaultNai != null && defaultNai.network.netId == netId) { 3899 setDefaultDnsSystemProperties(dnses); 3900 } 3901 flushVmDnsCache(); 3902 } else if (flush) { 3903 try { 3904 mNetd.flushNetworkDnsCache(netId); 3905 } catch (Exception e) { 3906 loge("Exception in flushNetworkDnsCache: " + e); 3907 } 3908 flushVmDnsCache(); 3909 } 3910 } 3911 3912 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 3913 int last = 0; 3914 for (InetAddress dns : dnses) { 3915 ++last; 3916 String key = "net.dns" + last; 3917 String value = dns.getHostAddress(); 3918 SystemProperties.set(key, value); 3919 } 3920 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 3921 String key = "net.dns" + i; 3922 SystemProperties.set(key, ""); 3923 } 3924 mNumDnsEntries = last; 3925 } 3926 3927 private void updateCapabilities(NetworkAgentInfo networkAgent, 3928 NetworkCapabilities networkCapabilities) { 3929 if (!Objects.equals(networkAgent.networkCapabilities, networkCapabilities)) { 3930 synchronized (networkAgent) { 3931 networkAgent.networkCapabilities = networkCapabilities; 3932 } 3933 rematchAllNetworksAndRequests(networkAgent, networkAgent.getCurrentScore()); 3934 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_CAP_CHANGED); 3935 } 3936 } 3937 3938 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 3939 for (int i = 0; i < nai.networkRequests.size(); i++) { 3940 NetworkRequest nr = nai.networkRequests.valueAt(i); 3941 // Don't send listening requests to factories. b/17393458 3942 if (!isRequest(nr)) continue; 3943 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 3944 } 3945 } 3946 3947 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 3948 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 3949 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 3950 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 3951 networkRequest); 3952 } 3953 } 3954 3955 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 3956 int notificationType) { 3957 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 3958 Intent intent = new Intent(); 3959 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 3960 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 3961 nri.mPendingIntentSent = true; 3962 sendIntent(nri.mPendingIntent, intent); 3963 } 3964 // else not handled 3965 } 3966 3967 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 3968 mPendingIntentWakeLock.acquire(); 3969 try { 3970 if (DBG) log("Sending " + pendingIntent); 3971 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 3972 } catch (PendingIntent.CanceledException e) { 3973 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 3974 mPendingIntentWakeLock.release(); 3975 releasePendingNetworkRequest(pendingIntent); 3976 } 3977 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 3978 } 3979 3980 @Override 3981 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 3982 String resultData, Bundle resultExtras) { 3983 if (DBG) log("Finished sending " + pendingIntent); 3984 mPendingIntentWakeLock.release(); 3985 // Release with a delay so the receiving client has an opportunity to put in its 3986 // own request. 3987 releasePendingNetworkRequestWithDelay(pendingIntent); 3988 } 3989 3990 private void callCallbackForRequest(NetworkRequestInfo nri, 3991 NetworkAgentInfo networkAgent, int notificationType) { 3992 if (nri.messenger == null) return; // Default request has no msgr 3993 Bundle bundle = new Bundle(); 3994 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 3995 new NetworkRequest(nri.request)); 3996 Message msg = Message.obtain(); 3997 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 3998 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 3999 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4000 } 4001 switch (notificationType) { 4002 case ConnectivityManager.CALLBACK_LOSING: { 4003 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4004 break; 4005 } 4006 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4007 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4008 new NetworkCapabilities(networkAgent.networkCapabilities)); 4009 break; 4010 } 4011 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4012 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4013 new LinkProperties(networkAgent.linkProperties)); 4014 break; 4015 } 4016 } 4017 msg.what = notificationType; 4018 msg.setData(bundle); 4019 try { 4020 if (VDBG) { 4021 log("sending notification " + notifyTypeToName(notificationType) + 4022 " for " + nri.request); 4023 } 4024 nri.messenger.send(msg); 4025 } catch (RemoteException e) { 4026 // may occur naturally in the race of binder death. 4027 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4028 } 4029 } 4030 4031 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4032 for (int i = 0; i < nai.networkRequests.size(); i++) { 4033 NetworkRequest nr = nai.networkRequests.valueAt(i); 4034 // Ignore listening requests. 4035 if (!isRequest(nr)) continue; 4036 loge("Dead network still had at least " + nr); 4037 break; 4038 } 4039 nai.asyncChannel.disconnect(); 4040 } 4041 4042 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4043 if (oldNetwork == null) { 4044 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4045 return; 4046 } 4047 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4048 teardownUnneededNetwork(oldNetwork); 4049 } 4050 4051 private void makeDefault(NetworkAgentInfo newNetwork) { 4052 if (DBG) log("Switching to new default network: " + newNetwork); 4053 setupDataActivityTracking(newNetwork); 4054 try { 4055 mNetd.setDefaultNetId(newNetwork.network.netId); 4056 } catch (Exception e) { 4057 loge("Exception setting default network :" + e); 4058 } 4059 notifyLockdownVpn(newNetwork); 4060 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4061 updateTcpBufferSizes(newNetwork); 4062 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4063 } 4064 4065 // Handles a network appearing or improving its score. 4066 // 4067 // - Evaluates all current NetworkRequests that can be 4068 // satisfied by newNetwork, and reassigns to newNetwork 4069 // any such requests for which newNetwork is the best. 4070 // 4071 // - Lingers any validated Networks that as a result are no longer 4072 // needed. A network is needed if it is the best network for 4073 // one or more NetworkRequests, or if it is a VPN. 4074 // 4075 // - Tears down newNetwork if it just became validated 4076 // (i.e. nascent==JUST_VALIDATED) but turns out to be unneeded. 4077 // 4078 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4079 // networks that have no chance (i.e. even if validated) 4080 // of becoming the highest scoring network. 4081 // 4082 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4083 // it does not remove NetworkRequests that other Networks could better satisfy. 4084 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4085 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4086 // as it performs better by a factor of the number of Networks. 4087 // 4088 // @param newNetwork is the network to be matched against NetworkRequests. 4089 // @param nascent indicates if newNetwork just became validated, in which case it should be 4090 // torn down if unneeded. 4091 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4092 // performed to tear down unvalidated networks that have no chance (i.e. even if 4093 // validated) of becoming the highest scoring network. 4094 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, NascentState nascent, 4095 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4096 if (!newNetwork.created) return; 4097 if (nascent == NascentState.JUST_VALIDATED && !newNetwork.everValidated) { 4098 loge("ERROR: nascent network not validated."); 4099 } 4100 boolean keep = newNetwork.isVPN(); 4101 boolean isNewDefault = false; 4102 NetworkAgentInfo oldDefaultNetwork = null; 4103 if (DBG) log("rematching " + newNetwork.name()); 4104 // Find and migrate to this Network any NetworkRequests for 4105 // which this network is now the best. 4106 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4107 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4108 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4109 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4110 if (newNetwork == currentNetwork) { 4111 if (DBG) { 4112 log("Network " + newNetwork.name() + " was already satisfying" + 4113 " request " + nri.request.requestId + ". No change."); 4114 } 4115 keep = true; 4116 continue; 4117 } 4118 4119 // check if it satisfies the NetworkCapabilities 4120 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4121 if (newNetwork.satisfies(nri.request)) { 4122 if (!nri.isRequest) { 4123 // This is not a request, it's a callback listener. 4124 // Add it to newNetwork regardless of score. 4125 newNetwork.addRequest(nri.request); 4126 continue; 4127 } 4128 4129 // next check if it's better than any current network we're using for 4130 // this request 4131 if (VDBG) { 4132 log("currentScore = " + 4133 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4134 ", newScore = " + newNetwork.getCurrentScore()); 4135 } 4136 if (currentNetwork == null || 4137 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4138 if (currentNetwork != null) { 4139 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4140 currentNetwork.networkRequests.remove(nri.request.requestId); 4141 currentNetwork.networkLingered.add(nri.request); 4142 affectedNetworks.add(currentNetwork); 4143 } else { 4144 if (DBG) log(" accepting network in place of null"); 4145 } 4146 unlinger(newNetwork); 4147 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4148 newNetwork.addRequest(nri.request); 4149 keep = true; 4150 // Tell NetworkFactories about the new score, so they can stop 4151 // trying to connect if they know they cannot match it. 4152 // TODO - this could get expensive if we have alot of requests for this 4153 // network. Think about if there is a way to reduce this. Push 4154 // netid->request mapping to each factory? 4155 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4156 if (mDefaultRequest.requestId == nri.request.requestId) { 4157 isNewDefault = true; 4158 oldDefaultNetwork = currentNetwork; 4159 } 4160 } 4161 } 4162 } 4163 // Linger any networks that are no longer needed. 4164 for (NetworkAgentInfo nai : affectedNetworks) { 4165 if (nai.everValidated && unneeded(nai)) { 4166 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 4167 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 4168 } else { 4169 unlinger(nai); 4170 } 4171 } 4172 if (keep) { 4173 if (isNewDefault) { 4174 // Notify system services that this network is up. 4175 makeDefault(newNetwork); 4176 synchronized (ConnectivityService.this) { 4177 // have a new default network, release the transition wakelock in 4178 // a second if it's held. The second pause is to allow apps 4179 // to reconnect over the new network 4180 if (mNetTransitionWakeLock.isHeld()) { 4181 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4182 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4183 mNetTransitionWakeLockSerialNumber, 0), 4184 1000); 4185 } 4186 } 4187 } 4188 4189 // do this after the default net is switched, but 4190 // before LegacyTypeTracker sends legacy broadcasts 4191 notifyNetworkCallbacks(newNetwork, ConnectivityManager.CALLBACK_AVAILABLE); 4192 4193 if (isNewDefault) { 4194 // Maintain the illusion: since the legacy API only 4195 // understands one network at a time, we must pretend 4196 // that the current default network disconnected before 4197 // the new one connected. 4198 if (oldDefaultNetwork != null) { 4199 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4200 oldDefaultNetwork, true); 4201 } 4202 mDefaultInetConditionPublished = newNetwork.everValidated ? 100 : 0; 4203 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4204 notifyLockdownVpn(newNetwork); 4205 } 4206 4207 // Notify battery stats service about this network, both the normal 4208 // interface and any stacked links. 4209 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4210 try { 4211 final IBatteryStats bs = BatteryStatsService.getService(); 4212 final int type = newNetwork.networkInfo.getType(); 4213 4214 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4215 bs.noteNetworkInterfaceType(baseIface, type); 4216 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4217 final String stackedIface = stacked.getInterfaceName(); 4218 bs.noteNetworkInterfaceType(stackedIface, type); 4219 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4220 } 4221 } catch (RemoteException ignored) { 4222 } 4223 4224 // This has to happen after the notifyNetworkCallbacks as that tickles each 4225 // ConnectivityManager instance so that legacy requests correctly bind dns 4226 // requests to this network. The legacy users are listening for this bcast 4227 // and will generally do a dns request so they can ensureRouteToHost and if 4228 // they do that before the callbacks happen they'll use the default network. 4229 // 4230 // TODO: Is there still a race here? We send the broadcast 4231 // after sending the callback, but if the app can receive the 4232 // broadcast before the callback, it might still break. 4233 // 4234 // This *does* introduce a race where if the user uses the new api 4235 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4236 // they may get old info. Reverse this after the old startUsing api is removed. 4237 // This is on top of the multiple intent sequencing referenced in the todo above. 4238 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4239 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4240 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4241 // legacy type tracker filters out repeat adds 4242 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4243 } 4244 } 4245 4246 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4247 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4248 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4249 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4250 if (newNetwork.isVPN()) { 4251 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4252 } 4253 } else if (nascent == NascentState.JUST_VALIDATED) { 4254 // Only tear down newly validated networks here. Leave unvalidated to either become 4255 // validated (and get evaluated against peers, one losing here), or get reaped (see 4256 // reapUnvalidatedNetworks) if they have no chance of becoming the highest scoring 4257 // network. Networks that have been up for a while and are validated should be torn 4258 // down via the lingering process so communication on that network is given time to 4259 // wrap up. 4260 if (DBG) log("Validated network turns out to be unwanted. Tear it down."); 4261 teardownUnneededNetwork(newNetwork); 4262 } 4263 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4264 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4265 if (!nai.everValidated && unneeded(nai)) { 4266 if (DBG) log("Reaping " + nai.name()); 4267 teardownUnneededNetwork(nai); 4268 } 4269 } 4270 } 4271 } 4272 4273 // Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4274 // being disconnected. 4275 // If only one Network's score or capabilities have been modified since the last time 4276 // this function was called, pass this Network in via the "changed" arugment, otherwise 4277 // pass null. 4278 // If only one Network has been changed but its NetworkCapabilities have not changed, 4279 // pass in the Network's score (from getCurrentScore()) prior to the change via 4280 // "oldScore", otherwise pass changed.getCurrentScore() or 0 if "changed" is null. 4281 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4282 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4283 // to avoid the slowness. It is not simply enough to process just "changed", for 4284 // example in the case where "changed"'s score decreases and another network should begin 4285 // satifying a NetworkRequest that "changed" currently satisfies. 4286 4287 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4288 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4289 // rematchNetworkAndRequests() handles. 4290 if (changed != null && oldScore < changed.getCurrentScore()) { 4291 rematchNetworkAndRequests(changed, NascentState.NOT_JUST_VALIDATED, 4292 ReapUnvalidatedNetworks.REAP); 4293 } else { 4294 for (Iterator i = mNetworkAgentInfos.values().iterator(); i.hasNext(); ) { 4295 rematchNetworkAndRequests((NetworkAgentInfo)i.next(), 4296 NascentState.NOT_JUST_VALIDATED, 4297 // Only reap the last time through the loop. Reaping before all rematching 4298 // is complete could incorrectly teardown a network that hasn't yet been 4299 // rematched. 4300 i.hasNext() ? ReapUnvalidatedNetworks.DONT_REAP 4301 : ReapUnvalidatedNetworks.REAP); 4302 } 4303 } 4304 } 4305 4306 private void updateInetCondition(NetworkAgentInfo nai) { 4307 // Don't bother updating until we've graduated to validated at least once. 4308 if (!nai.everValidated) return; 4309 // For now only update icons for default connection. 4310 // TODO: Update WiFi and cellular icons separately. b/17237507 4311 if (!isDefaultNetwork(nai)) return; 4312 4313 int newInetCondition = nai.lastValidated ? 100 : 0; 4314 // Don't repeat publish. 4315 if (newInetCondition == mDefaultInetConditionPublished) return; 4316 4317 mDefaultInetConditionPublished = newInetCondition; 4318 sendInetConditionBroadcast(nai.networkInfo); 4319 } 4320 4321 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4322 if (mLockdownTracker != null) { 4323 if (nai != null && nai.isVPN()) { 4324 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4325 } else { 4326 mLockdownTracker.onNetworkInfoChanged(); 4327 } 4328 } 4329 } 4330 4331 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4332 NetworkInfo.State state = newInfo.getState(); 4333 NetworkInfo oldInfo = null; 4334 synchronized (networkAgent) { 4335 oldInfo = networkAgent.networkInfo; 4336 networkAgent.networkInfo = newInfo; 4337 } 4338 notifyLockdownVpn(networkAgent); 4339 4340 if (oldInfo != null && oldInfo.getState() == state) { 4341 if (VDBG) log("ignoring duplicate network state non-change"); 4342 return; 4343 } 4344 if (DBG) { 4345 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4346 (oldInfo == null ? "null" : oldInfo.getState()) + 4347 " to " + state); 4348 } 4349 4350 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4351 try { 4352 // This should never fail. Specifying an already in use NetID will cause failure. 4353 if (networkAgent.isVPN()) { 4354 mNetd.createVirtualNetwork(networkAgent.network.netId, 4355 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4356 (networkAgent.networkMisc == null || 4357 !networkAgent.networkMisc.allowBypass)); 4358 } else { 4359 mNetd.createPhysicalNetwork(networkAgent.network.netId); 4360 } 4361 } catch (Exception e) { 4362 loge("Error creating network " + networkAgent.network.netId + ": " 4363 + e.getMessage()); 4364 return; 4365 } 4366 networkAgent.created = true; 4367 updateLinkProperties(networkAgent, null); 4368 notifyIfacesChanged(); 4369 4370 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4371 scheduleUnvalidatedPrompt(networkAgent); 4372 4373 if (networkAgent.isVPN()) { 4374 // Temporarily disable the default proxy (not global). 4375 synchronized (mProxyLock) { 4376 if (!mDefaultProxyDisabled) { 4377 mDefaultProxyDisabled = true; 4378 if (mGlobalProxy == null && mDefaultProxy != null) { 4379 sendProxyBroadcast(null); 4380 } 4381 } 4382 } 4383 // TODO: support proxy per network. 4384 } 4385 4386 // Consider network even though it is not yet validated. 4387 rematchNetworkAndRequests(networkAgent, NascentState.NOT_JUST_VALIDATED, 4388 ReapUnvalidatedNetworks.REAP); 4389 4390 // This has to happen after matching the requests, because callbacks are just requests. 4391 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4392 } else if (state == NetworkInfo.State.DISCONNECTED || 4393 state == NetworkInfo.State.SUSPENDED) { 4394 networkAgent.asyncChannel.disconnect(); 4395 if (networkAgent.isVPN()) { 4396 synchronized (mProxyLock) { 4397 if (mDefaultProxyDisabled) { 4398 mDefaultProxyDisabled = false; 4399 if (mGlobalProxy == null && mDefaultProxy != null) { 4400 sendProxyBroadcast(mDefaultProxy); 4401 } 4402 } 4403 } 4404 } 4405 } 4406 } 4407 4408 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4409 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4410 if (score < 0) { 4411 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4412 "). Bumping score to min of 0"); 4413 score = 0; 4414 } 4415 4416 final int oldScore = nai.getCurrentScore(); 4417 nai.setCurrentScore(score); 4418 4419 rematchAllNetworksAndRequests(nai, oldScore); 4420 4421 sendUpdatedScoreToFactories(nai); 4422 } 4423 4424 // notify only this one new request of the current state 4425 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4426 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4427 // TODO - read state from monitor to decide what to send. 4428// if (nai.networkMonitor.isLingering()) { 4429// notifyType = NetworkCallbacks.LOSING; 4430// } else if (nai.networkMonitor.isEvaluating()) { 4431// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4432// } 4433 if (nri.mPendingIntent == null) { 4434 callCallbackForRequest(nri, nai, notifyType); 4435 } else { 4436 sendPendingIntentForRequest(nri, nai, notifyType); 4437 } 4438 } 4439 4440 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, boolean connected, int type) { 4441 // The NetworkInfo we actually send out has no bearing on the real 4442 // state of affairs. For example, if the default connection is mobile, 4443 // and a request for HIPRI has just gone away, we need to pretend that 4444 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4445 // the state to DISCONNECTED, even though the network is of type MOBILE 4446 // and is still connected. 4447 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4448 info.setType(type); 4449 if (connected) { 4450 info.setDetailedState(DetailedState.CONNECTED, null, info.getExtraInfo()); 4451 sendConnectedBroadcast(info); 4452 } else { 4453 info.setDetailedState(DetailedState.DISCONNECTED, null, info.getExtraInfo()); 4454 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4455 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4456 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4457 if (info.isFailover()) { 4458 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4459 nai.networkInfo.setFailover(false); 4460 } 4461 if (info.getReason() != null) { 4462 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4463 } 4464 if (info.getExtraInfo() != null) { 4465 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4466 } 4467 NetworkAgentInfo newDefaultAgent = null; 4468 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4469 newDefaultAgent = mNetworkForRequestId.get(mDefaultRequest.requestId); 4470 if (newDefaultAgent != null) { 4471 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4472 newDefaultAgent.networkInfo); 4473 } else { 4474 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4475 } 4476 } 4477 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4478 mDefaultInetConditionPublished); 4479 sendStickyBroadcast(intent); 4480 if (newDefaultAgent != null) { 4481 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4482 } 4483 } 4484 } 4485 4486 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4487 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4488 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4489 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4490 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4491 if (VDBG) log(" sending notification for " + nr); 4492 if (nri.mPendingIntent == null) { 4493 callCallbackForRequest(nri, networkAgent, notifyType); 4494 } else { 4495 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4496 } 4497 } 4498 } 4499 4500 private String notifyTypeToName(int notifyType) { 4501 switch (notifyType) { 4502 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4503 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4504 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4505 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4506 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4507 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4508 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4509 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4510 } 4511 return "UNKNOWN"; 4512 } 4513 4514 /** 4515 * Notify other system services that set of active ifaces has changed. 4516 */ 4517 private void notifyIfacesChanged() { 4518 try { 4519 mStatsService.forceUpdateIfaces(); 4520 } catch (Exception ignored) { 4521 } 4522 } 4523 4524 @Override 4525 public boolean addVpnAddress(String address, int prefixLength) { 4526 throwIfLockdownEnabled(); 4527 int user = UserHandle.getUserId(Binder.getCallingUid()); 4528 synchronized (mVpns) { 4529 return mVpns.get(user).addAddress(address, prefixLength); 4530 } 4531 } 4532 4533 @Override 4534 public boolean removeVpnAddress(String address, int prefixLength) { 4535 throwIfLockdownEnabled(); 4536 int user = UserHandle.getUserId(Binder.getCallingUid()); 4537 synchronized (mVpns) { 4538 return mVpns.get(user).removeAddress(address, prefixLength); 4539 } 4540 } 4541 4542 @Override 4543 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 4544 throwIfLockdownEnabled(); 4545 int user = UserHandle.getUserId(Binder.getCallingUid()); 4546 boolean success; 4547 synchronized (mVpns) { 4548 success = mVpns.get(user).setUnderlyingNetworks(networks); 4549 } 4550 if (success) { 4551 notifyIfacesChanged(); 4552 } 4553 return success; 4554 } 4555 4556 @Override 4557 public void factoryReset() { 4558 enforceConnectivityInternalPermission(); 4559 // Turn airplane mode off 4560 setAirplaneMode(false); 4561 4562 // Untether 4563 for (String tether : getTetheredIfaces()) { 4564 untether(tether); 4565 } 4566 4567 // Turn VPN off 4568 VpnConfig vpnConfig = getVpnConfig(); 4569 if (vpnConfig != null) { 4570 if (vpnConfig.legacy) { 4571 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN); 4572 } else { 4573 // Prevent this app from initiating VPN connections in the future without 4574 // user intervention. 4575 setVpnPackageAuthorization(false); 4576 4577 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN); 4578 } 4579 } 4580 } 4581} 4582