ConnectivityService.java revision 7094d22022c8e0c6ad71920b101434dded8a276e
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 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 /** Handler used for internal events. */ 348 final private InternalHandler mHandler; 349 /** Handler used for incoming {@link NetworkStateTracker} events. */ 350 final private NetworkStateTrackerHandler mTrackerHandler; 351 352 private boolean mSystemReady; 353 private Intent mInitialBroadcast; 354 355 private PowerManager.WakeLock mNetTransitionWakeLock; 356 private String mNetTransitionWakeLockCausedBy = ""; 357 private int mNetTransitionWakeLockSerialNumber; 358 private int mNetTransitionWakeLockTimeout; 359 private final PowerManager.WakeLock mPendingIntentWakeLock; 360 361 private InetAddress mDefaultDns; 362 363 // used in DBG mode to track inet condition reports 364 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 365 private ArrayList mInetLog; 366 367 // track the current default http proxy - tell the world if we get a new one (real change) 368 private volatile ProxyInfo mDefaultProxy = null; 369 private Object mProxyLock = new Object(); 370 private boolean mDefaultProxyDisabled = false; 371 372 // track the global proxy. 373 private ProxyInfo mGlobalProxy = null; 374 375 private PacManager mPacManager = null; 376 377 private SettingsObserver mSettingsObserver; 378 379 private UserManager mUserManager; 380 381 NetworkConfig[] mNetConfigs; 382 int mNetworksDefined; 383 384 // the set of network types that can only be enabled by system/sig apps 385 List mProtectedNetworks; 386 387 private DataConnectionStats mDataConnectionStats; 388 389 TelephonyManager mTelephonyManager; 390 391 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 392 private final static int MIN_NET_ID = 100; // some reserved marks 393 private final static int MAX_NET_ID = 65535; 394 private int mNextNetId = MIN_NET_ID; 395 396 // sequence number of NetworkRequests 397 private int mNextNetworkRequestId = 1; 398 399 /** 400 * Implements support for the legacy "one network per network type" model. 401 * 402 * We used to have a static array of NetworkStateTrackers, one for each 403 * network type, but that doesn't work any more now that we can have, 404 * for example, more that one wifi network. This class stores all the 405 * NetworkAgentInfo objects that support a given type, but the legacy 406 * API will only see the first one. 407 * 408 * It serves two main purposes: 409 * 410 * 1. Provide information about "the network for a given type" (since this 411 * API only supports one). 412 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 413 * the first network for a given type changes, or if the default network 414 * changes. 415 */ 416 private class LegacyTypeTracker { 417 418 private static final boolean DBG = true; 419 private static final boolean VDBG = false; 420 private static final String TAG = "CSLegacyTypeTracker"; 421 422 /** 423 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 424 * Each list holds references to all NetworkAgentInfos that are used to 425 * satisfy requests for that network type. 426 * 427 * This array is built out at startup such that an unsupported network 428 * doesn't get an ArrayList instance, making this a tristate: 429 * unsupported, supported but not active and active. 430 * 431 * The actual lists are populated when we scan the network types that 432 * are supported on this device. 433 */ 434 private ArrayList<NetworkAgentInfo> mTypeLists[]; 435 436 public LegacyTypeTracker() { 437 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 438 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 439 } 440 441 public void addSupportedType(int type) { 442 if (mTypeLists[type] != null) { 443 throw new IllegalStateException( 444 "legacy list for type " + type + "already initialized"); 445 } 446 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 447 } 448 449 public boolean isTypeSupported(int type) { 450 return isNetworkTypeValid(type) && mTypeLists[type] != null; 451 } 452 453 public NetworkAgentInfo getNetworkForType(int type) { 454 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 455 return mTypeLists[type].get(0); 456 } else { 457 return null; 458 } 459 } 460 461 private void maybeLogBroadcast(NetworkAgentInfo nai, boolean connected, int type) { 462 if (DBG) { 463 log("Sending " + (connected ? "connected" : "disconnected") + 464 " broadcast for type " + type + " " + nai.name() + 465 " isDefaultNetwork=" + isDefaultNetwork(nai)); 466 } 467 } 468 469 /** Adds the given network to the specified legacy type list. */ 470 public void add(int type, NetworkAgentInfo nai) { 471 if (!isTypeSupported(type)) { 472 return; // Invalid network type. 473 } 474 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 475 476 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 477 if (list.contains(nai)) { 478 loge("Attempting to register duplicate agent for type " + type + ": " + nai); 479 return; 480 } 481 482 list.add(nai); 483 484 // Send a broadcast if this is the first network of its type or if it's the default. 485 if (list.size() == 1 || isDefaultNetwork(nai)) { 486 maybeLogBroadcast(nai, true, type); 487 sendLegacyNetworkBroadcast(nai, true, type); 488 } 489 } 490 491 /** Removes the given network from the specified legacy type list. */ 492 public void remove(int type, NetworkAgentInfo nai) { 493 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 494 if (list == null || list.isEmpty()) { 495 return; 496 } 497 498 boolean wasFirstNetwork = list.get(0).equals(nai); 499 500 if (!list.remove(nai)) { 501 return; 502 } 503 504 if (wasFirstNetwork || isDefaultNetwork(nai)) { 505 maybeLogBroadcast(nai, false, type); 506 sendLegacyNetworkBroadcast(nai, false, type); 507 } 508 509 if (!list.isEmpty() && wasFirstNetwork) { 510 if (DBG) log("Other network available for type " + type + 511 ", sending connected broadcast"); 512 maybeLogBroadcast(list.get(0), false, type); 513 sendLegacyNetworkBroadcast(list.get(0), false, type); 514 } 515 } 516 517 /** Removes the given network from all legacy type lists. */ 518 public void remove(NetworkAgentInfo nai) { 519 if (VDBG) log("Removing agent " + nai); 520 for (int type = 0; type < mTypeLists.length; type++) { 521 remove(type, nai); 522 } 523 } 524 525 private String naiToString(NetworkAgentInfo nai) { 526 String name = (nai != null) ? nai.name() : "null"; 527 String state = (nai.networkInfo != null) ? 528 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 529 "???/???"; 530 return name + " " + state; 531 } 532 533 public void dump(IndentingPrintWriter pw) { 534 for (int type = 0; type < mTypeLists.length; type++) { 535 if (mTypeLists[type] == null) continue; 536 pw.print(type + " "); 537 pw.increaseIndent(); 538 if (mTypeLists[type].size() == 0) pw.println("none"); 539 for (NetworkAgentInfo nai : mTypeLists[type]) { 540 pw.println(naiToString(nai)); 541 } 542 pw.decreaseIndent(); 543 } 544 } 545 546 // This class needs its own log method because it has a different TAG. 547 private void log(String s) { 548 Slog.d(TAG, s); 549 } 550 551 } 552 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 553 554 public ConnectivityService(Context context, INetworkManagementService netManager, 555 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 556 if (DBG) log("ConnectivityService starting up"); 557 558 NetworkCapabilities netCap = new NetworkCapabilities(); 559 netCap.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET); 560 netCap.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED); 561 mDefaultRequest = new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 562 NetworkRequestInfo nri = new NetworkRequestInfo(null, mDefaultRequest, new Binder(), 563 NetworkRequestInfo.REQUEST); 564 mNetworkRequests.put(mDefaultRequest, nri); 565 566 HandlerThread handlerThread = new HandlerThread("ConnectivityServiceThread"); 567 handlerThread.start(); 568 mHandler = new InternalHandler(handlerThread.getLooper()); 569 mTrackerHandler = new NetworkStateTrackerHandler(handlerThread.getLooper()); 570 571 // setup our unique device name 572 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 573 String id = Settings.Secure.getString(context.getContentResolver(), 574 Settings.Secure.ANDROID_ID); 575 if (id != null && id.length() > 0) { 576 String name = new String("android-").concat(id); 577 SystemProperties.set("net.hostname", name); 578 } 579 } 580 581 // read our default dns server ip 582 String dns = Settings.Global.getString(context.getContentResolver(), 583 Settings.Global.DEFAULT_DNS_SERVER); 584 if (dns == null || dns.length() == 0) { 585 dns = context.getResources().getString( 586 com.android.internal.R.string.config_default_dns_server); 587 } 588 try { 589 mDefaultDns = NetworkUtils.numericToInetAddress(dns); 590 } catch (IllegalArgumentException e) { 591 loge("Error setting defaultDns using " + dns); 592 } 593 594 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 595 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 596 597 mContext = checkNotNull(context, "missing Context"); 598 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 599 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 600 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 601 mKeyStore = KeyStore.getInstance(); 602 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 603 604 try { 605 mPolicyManager.registerListener(mPolicyListener); 606 } catch (RemoteException e) { 607 // ouch, no rules updates means some processes may never get network 608 loge("unable to register INetworkPolicyListener" + e.toString()); 609 } 610 611 final PowerManager powerManager = (PowerManager) context.getSystemService( 612 Context.POWER_SERVICE); 613 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 614 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 615 com.android.internal.R.integer.config_networkTransitionTimeout); 616 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 617 618 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 619 620 // TODO: What is the "correct" way to do determine if this is a wifi only device? 621 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 622 log("wifiOnly=" + wifiOnly); 623 String[] naStrings = context.getResources().getStringArray( 624 com.android.internal.R.array.networkAttributes); 625 for (String naString : naStrings) { 626 try { 627 NetworkConfig n = new NetworkConfig(naString); 628 if (VDBG) log("naString=" + naString + " config=" + n); 629 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 630 loge("Error in networkAttributes - ignoring attempt to define type " + 631 n.type); 632 continue; 633 } 634 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 635 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 636 n.type); 637 continue; 638 } 639 if (mNetConfigs[n.type] != null) { 640 loge("Error in networkAttributes - ignoring attempt to redefine type " + 641 n.type); 642 continue; 643 } 644 mLegacyTypeTracker.addSupportedType(n.type); 645 646 mNetConfigs[n.type] = n; 647 mNetworksDefined++; 648 } catch(Exception e) { 649 // ignore it - leave the entry null 650 } 651 } 652 653 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 654 if (mNetConfigs[TYPE_VPN] == null) { 655 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 656 // don't need to add TYPE_VPN to mNetConfigs. 657 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 658 mNetworksDefined++; // used only in the log() statement below. 659 } 660 661 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 662 663 mProtectedNetworks = new ArrayList<Integer>(); 664 int[] protectedNetworks = context.getResources().getIntArray( 665 com.android.internal.R.array.config_protectedNetworks); 666 for (int p : protectedNetworks) { 667 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 668 mProtectedNetworks.add(p); 669 } else { 670 if (DBG) loge("Ignoring protectedNetwork " + p); 671 } 672 } 673 674 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 675 && SystemProperties.get("ro.build.type").equals("eng"); 676 677 mTethering = new Tethering(mContext, mNetd, statsService, mHandler.getLooper()); 678 679 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 680 681 //set up the listener for user state for creating user VPNs 682 IntentFilter intentFilter = new IntentFilter(); 683 intentFilter.addAction(Intent.ACTION_USER_STARTING); 684 intentFilter.addAction(Intent.ACTION_USER_STOPPING); 685 mContext.registerReceiverAsUser( 686 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 687 688 try { 689 mNetd.registerObserver(mTethering); 690 mNetd.registerObserver(mDataActivityObserver); 691 } catch (RemoteException e) { 692 loge("Error registering observer :" + e); 693 } 694 695 if (DBG) { 696 mInetLog = new ArrayList(); 697 } 698 699 mSettingsObserver = new SettingsObserver(mHandler, EVENT_APPLY_GLOBAL_HTTP_PROXY); 700 mSettingsObserver.observe(mContext); 701 702 mDataConnectionStats = new DataConnectionStats(mContext); 703 mDataConnectionStats.startMonitoring(); 704 705 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 706 707 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 708 } 709 710 private synchronized int nextNetworkRequestId() { 711 return mNextNetworkRequestId++; 712 } 713 714 private int reserveNetId() { 715 synchronized (mNetworkForNetId) { 716 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 717 int netId = mNextNetId; 718 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 719 // Make sure NetID unused. http://b/16815182 720 if (!mNetIdInUse.get(netId)) { 721 mNetIdInUse.put(netId, true); 722 return netId; 723 } 724 } 725 } 726 throw new IllegalStateException("No free netIds"); 727 } 728 729 private NetworkState getFilteredNetworkState(int networkType, int uid) { 730 NetworkInfo info = null; 731 LinkProperties lp = null; 732 NetworkCapabilities nc = null; 733 Network network = null; 734 String subscriberId = null; 735 736 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 737 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 738 if (nai != null) { 739 synchronized (nai) { 740 info = new NetworkInfo(nai.networkInfo); 741 lp = new LinkProperties(nai.linkProperties); 742 nc = new NetworkCapabilities(nai.networkCapabilities); 743 // Network objects are outwardly immutable so there is no point to duplicating. 744 // Duplicating also precludes sharing socket factories and connection pools. 745 network = nai.network; 746 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 747 } 748 info.setType(networkType); 749 } else { 750 info = new NetworkInfo(networkType, 0, getNetworkTypeName(networkType), ""); 751 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 752 info.setIsAvailable(true); 753 lp = new LinkProperties(); 754 nc = new NetworkCapabilities(); 755 network = null; 756 } 757 info = getFilteredNetworkInfo(info, lp, uid); 758 } 759 760 return new NetworkState(info, lp, nc, network, subscriberId, null); 761 } 762 763 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 764 if (network == null) { 765 return null; 766 } 767 synchronized (mNetworkForNetId) { 768 return mNetworkForNetId.get(network.netId); 769 } 770 }; 771 772 private Network[] getVpnUnderlyingNetworks(int uid) { 773 if (!mLockdownEnabled) { 774 int user = UserHandle.getUserId(uid); 775 synchronized (mVpns) { 776 Vpn vpn = mVpns.get(user); 777 if (vpn != null && vpn.appliesToUid(uid)) { 778 return vpn.getUnderlyingNetworks(); 779 } 780 } 781 } 782 return null; 783 } 784 785 private NetworkState getUnfilteredActiveNetworkState(int uid) { 786 NetworkInfo info = null; 787 LinkProperties lp = null; 788 NetworkCapabilities nc = null; 789 Network network = null; 790 String subscriberId = null; 791 792 NetworkAgentInfo nai = mNetworkForRequestId.get(mDefaultRequest.requestId); 793 794 final Network[] networks = getVpnUnderlyingNetworks(uid); 795 if (networks != null) { 796 // getUnderlyingNetworks() returns: 797 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 798 // empty array => the VPN explicitly said "no default network". 799 // non-empty array => the VPN specified one or more default networks; we use the 800 // first one. 801 if (networks.length > 0) { 802 nai = getNetworkAgentInfoForNetwork(networks[0]); 803 } else { 804 nai = null; 805 } 806 } 807 808 if (nai != null) { 809 synchronized (nai) { 810 info = new NetworkInfo(nai.networkInfo); 811 lp = new LinkProperties(nai.linkProperties); 812 nc = new NetworkCapabilities(nai.networkCapabilities); 813 // Network objects are outwardly immutable so there is no point to duplicating. 814 // Duplicating also precludes sharing socket factories and connection pools. 815 network = nai.network; 816 subscriberId = (nai.networkMisc != null) ? nai.networkMisc.subscriberId : null; 817 } 818 } 819 820 return new NetworkState(info, lp, nc, network, subscriberId, null); 821 } 822 823 /** 824 * Check if UID should be blocked from using the network with the given LinkProperties. 825 */ 826 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) { 827 final boolean networkCostly; 828 final int uidRules; 829 830 final String iface = (lp == null ? "" : lp.getInterfaceName()); 831 synchronized (mRulesLock) { 832 networkCostly = mMeteredIfaces.contains(iface); 833 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 834 } 835 836 if ((uidRules & RULE_REJECT_ALL) != 0 837 || (networkCostly && (uidRules & RULE_REJECT_METERED) != 0)) { 838 return true; 839 } 840 841 // no restrictive rules; network is visible 842 return false; 843 } 844 845 /** 846 * Return a filtered {@link NetworkInfo}, potentially marked 847 * {@link DetailedState#BLOCKED} based on 848 * {@link #isNetworkWithLinkPropertiesBlocked}. 849 */ 850 private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, LinkProperties lp, int uid) { 851 if (info != null && isNetworkWithLinkPropertiesBlocked(lp, uid)) { 852 // network is blocked; clone and override state 853 info = new NetworkInfo(info); 854 info.setDetailedState(DetailedState.BLOCKED, null, null); 855 if (DBG) { 856 log("returning Blocked NetworkInfo for ifname=" + 857 lp.getInterfaceName() + ", uid=" + uid); 858 } 859 } 860 if (info != null && mLockdownTracker != null) { 861 info = mLockdownTracker.augmentNetworkInfo(info); 862 if (DBG) log("returning Locked NetworkInfo"); 863 } 864 return info; 865 } 866 867 /** 868 * Return NetworkInfo for the active (i.e., connected) network interface. 869 * It is assumed that at most one network is active at a time. If more 870 * than one is active, it is indeterminate which will be returned. 871 * @return the info for the active network, or {@code null} if none is 872 * active 873 */ 874 @Override 875 public NetworkInfo getActiveNetworkInfo() { 876 enforceAccessPermission(); 877 final int uid = Binder.getCallingUid(); 878 NetworkState state = getUnfilteredActiveNetworkState(uid); 879 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 880 } 881 882 @Override 883 public Network getActiveNetwork() { 884 enforceAccessPermission(); 885 final int uid = Binder.getCallingUid(); 886 final int user = UserHandle.getUserId(uid); 887 int vpnNetId = NETID_UNSET; 888 synchronized (mVpns) { 889 final Vpn vpn = mVpns.get(user); 890 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 891 } 892 NetworkAgentInfo nai; 893 if (vpnNetId != NETID_UNSET) { 894 synchronized (mNetworkForNetId) { 895 nai = mNetworkForNetId.get(vpnNetId); 896 } 897 if (nai != null) return nai.network; 898 } 899 nai = getDefaultNetwork(); 900 if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) nai = null; 901 return nai != null ? nai.network : null; 902 } 903 904 /** 905 * Find the first Provisioning network. 906 * 907 * @return NetworkInfo or null if none. 908 */ 909 private NetworkInfo getProvisioningNetworkInfo() { 910 enforceAccessPermission(); 911 912 // Find the first Provisioning Network 913 NetworkInfo provNi = null; 914 for (NetworkInfo ni : getAllNetworkInfo()) { 915 if (ni.isConnectedToProvisioningNetwork()) { 916 provNi = ni; 917 break; 918 } 919 } 920 if (DBG) log("getProvisioningNetworkInfo: X provNi=" + provNi); 921 return provNi; 922 } 923 924 /** 925 * Find the first Provisioning network or the ActiveDefaultNetwork 926 * if there is no Provisioning network 927 * 928 * @return NetworkInfo or null if none. 929 */ 930 @Override 931 public NetworkInfo getProvisioningOrActiveNetworkInfo() { 932 enforceAccessPermission(); 933 934 NetworkInfo provNi = getProvisioningNetworkInfo(); 935 if (provNi == null) { 936 provNi = getActiveNetworkInfo(); 937 } 938 if (DBG) log("getProvisioningOrActiveNetworkInfo: X provNi=" + provNi); 939 return provNi; 940 } 941 942 public NetworkInfo getActiveNetworkInfoUnfiltered() { 943 enforceAccessPermission(); 944 final int uid = Binder.getCallingUid(); 945 NetworkState state = getUnfilteredActiveNetworkState(uid); 946 return state.networkInfo; 947 } 948 949 @Override 950 public NetworkInfo getActiveNetworkInfoForUid(int uid) { 951 enforceConnectivityInternalPermission(); 952 NetworkState state = getUnfilteredActiveNetworkState(uid); 953 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 954 } 955 956 @Override 957 public NetworkInfo getNetworkInfo(int networkType) { 958 enforceAccessPermission(); 959 final int uid = Binder.getCallingUid(); 960 if (getVpnUnderlyingNetworks(uid) != null) { 961 // A VPN is active, so we may need to return one of its underlying networks. This 962 // information is not available in LegacyTypeTracker, so we have to get it from 963 // getUnfilteredActiveNetworkState. 964 NetworkState state = getUnfilteredActiveNetworkState(uid); 965 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 966 return getFilteredNetworkInfo(state.networkInfo, state.linkProperties, uid); 967 } 968 } 969 NetworkState state = getFilteredNetworkState(networkType, uid); 970 return state.networkInfo; 971 } 972 973 @Override 974 public NetworkInfo getNetworkInfoForNetwork(Network network) { 975 enforceAccessPermission(); 976 final int uid = Binder.getCallingUid(); 977 NetworkInfo info = null; 978 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 979 if (nai != null) { 980 synchronized (nai) { 981 info = new NetworkInfo(nai.networkInfo); 982 info = getFilteredNetworkInfo(info, nai.linkProperties, uid); 983 } 984 } 985 return info; 986 } 987 988 @Override 989 public NetworkInfo[] getAllNetworkInfo() { 990 enforceAccessPermission(); 991 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 992 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 993 networkType++) { 994 NetworkInfo info = getNetworkInfo(networkType); 995 if (info != null) { 996 result.add(info); 997 } 998 } 999 return result.toArray(new NetworkInfo[result.size()]); 1000 } 1001 1002 @Override 1003 public Network getNetworkForType(int networkType) { 1004 enforceAccessPermission(); 1005 final int uid = Binder.getCallingUid(); 1006 NetworkState state = getFilteredNetworkState(networkType, uid); 1007 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid)) { 1008 return state.network; 1009 } 1010 return null; 1011 } 1012 1013 @Override 1014 public Network[] getAllNetworks() { 1015 enforceAccessPermission(); 1016 synchronized (mNetworkForNetId) { 1017 final Network[] result = new Network[mNetworkForNetId.size()]; 1018 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1019 result[i] = mNetworkForNetId.valueAt(i).network; 1020 } 1021 return result; 1022 } 1023 } 1024 1025 private NetworkCapabilities getNetworkCapabilitiesAndValidation(NetworkAgentInfo nai) { 1026 if (nai != null) { 1027 synchronized (nai) { 1028 if (nai.created) { 1029 NetworkCapabilities nc = new NetworkCapabilities(nai.networkCapabilities); 1030 if (nai.lastValidated) { 1031 nc.addCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED); 1032 } else { 1033 nc.removeCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED); 1034 } 1035 return nc; 1036 } 1037 } 1038 } 1039 return null; 1040 } 1041 1042 @Override 1043 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1044 // The basic principle is: if an app's traffic could possibly go over a 1045 // network, without the app doing anything multinetwork-specific, 1046 // (hence, by "default"), then include that network's capabilities in 1047 // the array. 1048 // 1049 // In the normal case, app traffic only goes over the system's default 1050 // network connection, so that's the only network returned. 1051 // 1052 // With a VPN in force, some app traffic may go into the VPN, and thus 1053 // over whatever underlying networks the VPN specifies, while other app 1054 // traffic may go over the system default network (e.g.: a split-tunnel 1055 // VPN, or an app disallowed by the VPN), so the set of networks 1056 // returned includes the VPN's underlying networks and the system 1057 // default. 1058 enforceAccessPermission(); 1059 1060 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1061 1062 NetworkAgentInfo nai = getDefaultNetwork(); 1063 NetworkCapabilities nc = getNetworkCapabilitiesAndValidation(getDefaultNetwork()); 1064 if (nc != null) { 1065 result.put(nai.network, nc); 1066 } 1067 1068 if (!mLockdownEnabled) { 1069 synchronized (mVpns) { 1070 Vpn vpn = mVpns.get(userId); 1071 if (vpn != null) { 1072 Network[] networks = vpn.getUnderlyingNetworks(); 1073 if (networks != null) { 1074 for (Network network : networks) { 1075 nai = getNetworkAgentInfoForNetwork(network); 1076 nc = getNetworkCapabilitiesAndValidation(nai); 1077 if (nc != null) { 1078 result.put(nai.network, nc); 1079 } 1080 } 1081 } 1082 } 1083 } 1084 } 1085 1086 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1087 out = result.values().toArray(out); 1088 return out; 1089 } 1090 1091 @Override 1092 public boolean isNetworkSupported(int networkType) { 1093 enforceAccessPermission(); 1094 return mLegacyTypeTracker.isTypeSupported(networkType); 1095 } 1096 1097 /** 1098 * Return LinkProperties for the active (i.e., connected) default 1099 * network interface. It is assumed that at most one default network 1100 * is active at a time. If more than one is active, it is indeterminate 1101 * which will be returned. 1102 * @return the ip properties for the active network, or {@code null} if 1103 * none is active 1104 */ 1105 @Override 1106 public LinkProperties getActiveLinkProperties() { 1107 enforceAccessPermission(); 1108 final int uid = Binder.getCallingUid(); 1109 NetworkState state = getUnfilteredActiveNetworkState(uid); 1110 return state.linkProperties; 1111 } 1112 1113 @Override 1114 public LinkProperties getLinkPropertiesForType(int networkType) { 1115 enforceAccessPermission(); 1116 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1117 if (nai != null) { 1118 synchronized (nai) { 1119 return new LinkProperties(nai.linkProperties); 1120 } 1121 } 1122 return null; 1123 } 1124 1125 // TODO - this should be ALL networks 1126 @Override 1127 public LinkProperties getLinkProperties(Network network) { 1128 enforceAccessPermission(); 1129 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1130 if (nai != null) { 1131 synchronized (nai) { 1132 return new LinkProperties(nai.linkProperties); 1133 } 1134 } 1135 return null; 1136 } 1137 1138 @Override 1139 public NetworkCapabilities getNetworkCapabilities(Network network) { 1140 enforceAccessPermission(); 1141 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1142 if (nai != null) { 1143 synchronized (nai) { 1144 NetworkCapabilities nc = new NetworkCapabilities(nai.networkCapabilities); 1145 if (nai.lastValidated) { 1146 nc.addCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED); 1147 } else { 1148 nc.removeCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED); 1149 } 1150 return nc; 1151 } 1152 } 1153 return null; 1154 } 1155 1156 @Override 1157 public NetworkState[] getAllNetworkState() { 1158 // Require internal since we're handing out IMSI details 1159 enforceConnectivityInternalPermission(); 1160 1161 final ArrayList<NetworkState> result = Lists.newArrayList(); 1162 for (Network network : getAllNetworks()) { 1163 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1164 if (nai != null) { 1165 synchronized (nai) { 1166 final String subscriberId = (nai.networkMisc != null) 1167 ? nai.networkMisc.subscriberId : null; 1168 result.add(new NetworkState(nai.networkInfo, nai.linkProperties, 1169 nai.networkCapabilities, network, subscriberId, null)); 1170 } 1171 } 1172 } 1173 return result.toArray(new NetworkState[result.size()]); 1174 } 1175 1176 @Override 1177 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1178 enforceAccessPermission(); 1179 final int uid = Binder.getCallingUid(); 1180 final long token = Binder.clearCallingIdentity(); 1181 try { 1182 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1183 if (state.networkInfo != null) { 1184 try { 1185 return mPolicyManager.getNetworkQuotaInfo(state); 1186 } catch (RemoteException e) { 1187 } 1188 } 1189 return null; 1190 } finally { 1191 Binder.restoreCallingIdentity(token); 1192 } 1193 } 1194 1195 @Override 1196 public boolean isActiveNetworkMetered() { 1197 enforceAccessPermission(); 1198 final int uid = Binder.getCallingUid(); 1199 final long token = Binder.clearCallingIdentity(); 1200 try { 1201 return isActiveNetworkMeteredUnchecked(uid); 1202 } finally { 1203 Binder.restoreCallingIdentity(token); 1204 } 1205 } 1206 1207 private boolean isActiveNetworkMeteredUnchecked(int uid) { 1208 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1209 if (state.networkInfo != null) { 1210 try { 1211 return mPolicyManager.isNetworkMetered(state); 1212 } catch (RemoteException e) { 1213 } 1214 } 1215 return false; 1216 } 1217 1218 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1219 @Override 1220 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1221 int deviceType = Integer.parseInt(label); 1222 sendDataActivityBroadcast(deviceType, active, tsNanos); 1223 } 1224 }; 1225 1226 /** 1227 * Ensure that a network route exists to deliver traffic to the specified 1228 * host via the specified network interface. 1229 * @param networkType the type of the network over which traffic to the 1230 * specified host is to be routed 1231 * @param hostAddress the IP address of the host to which the route is 1232 * desired 1233 * @return {@code true} on success, {@code false} on failure 1234 */ 1235 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1236 enforceChangePermission(); 1237 if (mProtectedNetworks.contains(networkType)) { 1238 enforceConnectivityInternalPermission(); 1239 } 1240 1241 InetAddress addr; 1242 try { 1243 addr = InetAddress.getByAddress(hostAddress); 1244 } catch (UnknownHostException e) { 1245 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1246 return false; 1247 } 1248 1249 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1250 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1251 return false; 1252 } 1253 1254 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1255 if (nai == null) { 1256 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1257 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1258 } else { 1259 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1260 } 1261 return false; 1262 } 1263 1264 DetailedState netState; 1265 synchronized (nai) { 1266 netState = nai.networkInfo.getDetailedState(); 1267 } 1268 1269 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1270 if (VDBG) { 1271 log("requestRouteToHostAddress on down network " 1272 + "(" + networkType + ") - dropped" 1273 + " netState=" + netState); 1274 } 1275 return false; 1276 } 1277 1278 final int uid = Binder.getCallingUid(); 1279 final long token = Binder.clearCallingIdentity(); 1280 try { 1281 LinkProperties lp; 1282 int netId; 1283 synchronized (nai) { 1284 lp = nai.linkProperties; 1285 netId = nai.network.netId; 1286 } 1287 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1288 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1289 return ok; 1290 } finally { 1291 Binder.restoreCallingIdentity(token); 1292 } 1293 } 1294 1295 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1296 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1297 if (bestRoute == null) { 1298 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1299 } else { 1300 String iface = bestRoute.getInterface(); 1301 if (bestRoute.getGateway().equals(addr)) { 1302 // if there is no better route, add the implied hostroute for our gateway 1303 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1304 } else { 1305 // if we will connect to this through another route, add a direct route 1306 // to it's gateway 1307 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1308 } 1309 } 1310 if (DBG) log("Adding " + bestRoute + " for interface " + bestRoute.getInterface()); 1311 try { 1312 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1313 } catch (Exception e) { 1314 // never crash - catch them all 1315 if (DBG) loge("Exception trying to add a route: " + e); 1316 return false; 1317 } 1318 return true; 1319 } 1320 1321 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1322 @Override 1323 public void onUidRulesChanged(int uid, int uidRules) { 1324 // caller is NPMS, since we only register with them 1325 if (LOGD_RULES) { 1326 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1327 } 1328 1329 synchronized (mRulesLock) { 1330 // skip update when we've already applied rules 1331 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1332 if (oldRules == uidRules) return; 1333 1334 mUidRules.put(uid, uidRules); 1335 } 1336 1337 // TODO: notify UID when it has requested targeted updates 1338 } 1339 1340 @Override 1341 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1342 // caller is NPMS, since we only register with them 1343 if (LOGD_RULES) { 1344 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1345 } 1346 1347 synchronized (mRulesLock) { 1348 mMeteredIfaces.clear(); 1349 for (String iface : meteredIfaces) { 1350 mMeteredIfaces.add(iface); 1351 } 1352 } 1353 } 1354 1355 @Override 1356 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1357 // caller is NPMS, since we only register with them 1358 if (LOGD_RULES) { 1359 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1360 } 1361 } 1362 }; 1363 1364 private void enforceInternetPermission() { 1365 mContext.enforceCallingOrSelfPermission( 1366 android.Manifest.permission.INTERNET, 1367 "ConnectivityService"); 1368 } 1369 1370 private void enforceAccessPermission() { 1371 mContext.enforceCallingOrSelfPermission( 1372 android.Manifest.permission.ACCESS_NETWORK_STATE, 1373 "ConnectivityService"); 1374 } 1375 1376 private void enforceChangePermission() { 1377 mContext.enforceCallingOrSelfPermission( 1378 android.Manifest.permission.CHANGE_NETWORK_STATE, 1379 "ConnectivityService"); 1380 } 1381 1382 private void enforceTetherAccessPermission() { 1383 mContext.enforceCallingOrSelfPermission( 1384 android.Manifest.permission.ACCESS_NETWORK_STATE, 1385 "ConnectivityService"); 1386 } 1387 1388 private void enforceConnectivityInternalPermission() { 1389 mContext.enforceCallingOrSelfPermission( 1390 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1391 "ConnectivityService"); 1392 } 1393 1394 public void sendConnectedBroadcast(NetworkInfo info) { 1395 enforceConnectivityInternalPermission(); 1396 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1397 } 1398 1399 private void sendInetConditionBroadcast(NetworkInfo info) { 1400 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1401 } 1402 1403 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1404 if (mLockdownTracker != null) { 1405 info = mLockdownTracker.augmentNetworkInfo(info); 1406 } 1407 1408 Intent intent = new Intent(bcastType); 1409 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1410 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1411 if (info.isFailover()) { 1412 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1413 info.setFailover(false); 1414 } 1415 if (info.getReason() != null) { 1416 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1417 } 1418 if (info.getExtraInfo() != null) { 1419 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1420 info.getExtraInfo()); 1421 } 1422 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1423 return intent; 1424 } 1425 1426 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1427 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1428 } 1429 1430 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1431 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1432 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1433 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1434 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1435 final long ident = Binder.clearCallingIdentity(); 1436 try { 1437 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1438 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1439 } finally { 1440 Binder.restoreCallingIdentity(ident); 1441 } 1442 } 1443 1444 private void sendStickyBroadcast(Intent intent) { 1445 synchronized(this) { 1446 if (!mSystemReady) { 1447 mInitialBroadcast = new Intent(intent); 1448 } 1449 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1450 if (DBG) { 1451 log("sendStickyBroadcast: action=" + intent.getAction()); 1452 } 1453 1454 final long ident = Binder.clearCallingIdentity(); 1455 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1456 final IBatteryStats bs = BatteryStatsService.getService(); 1457 try { 1458 NetworkInfo ni = intent.getParcelableExtra( 1459 ConnectivityManager.EXTRA_NETWORK_INFO); 1460 bs.noteConnectivityChanged(intent.getIntExtra( 1461 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1462 ni != null ? ni.getState().toString() : "?"); 1463 } catch (RemoteException e) { 1464 } 1465 } 1466 try { 1467 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 1468 } finally { 1469 Binder.restoreCallingIdentity(ident); 1470 } 1471 } 1472 } 1473 1474 void systemReady() { 1475 loadGlobalProxy(); 1476 1477 synchronized(this) { 1478 mSystemReady = true; 1479 if (mInitialBroadcast != null) { 1480 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1481 mInitialBroadcast = null; 1482 } 1483 } 1484 // load the global proxy at startup 1485 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1486 1487 // Try bringing up tracker, but if KeyStore isn't ready yet, wait 1488 // for user to unlock device. 1489 if (!updateLockdownVpn()) { 1490 final IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT); 1491 mContext.registerReceiver(mUserPresentReceiver, filter); 1492 } 1493 1494 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1495 1496 mPermissionMonitor.startMonitoring(); 1497 } 1498 1499 private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() { 1500 @Override 1501 public void onReceive(Context context, Intent intent) { 1502 // Try creating lockdown tracker, since user present usually means 1503 // unlocked keystore. 1504 if (updateLockdownVpn()) { 1505 mContext.unregisterReceiver(this); 1506 } 1507 } 1508 }; 1509 1510 /** @hide */ 1511 @Override 1512 public void captivePortalCheckCompleted(NetworkInfo info, boolean isCaptivePortal) { 1513 enforceConnectivityInternalPermission(); 1514 if (DBG) log("captivePortalCheckCompleted: ni=" + info + " captive=" + isCaptivePortal); 1515// mNetTrackers[info.getType()].captivePortalCheckCompleted(isCaptivePortal); 1516 } 1517 1518 /** 1519 * Setup data activity tracking for the given network. 1520 * 1521 * Every {@code setupDataActivityTracking} should be paired with a 1522 * {@link #removeDataActivityTracking} for cleanup. 1523 */ 1524 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1525 final String iface = networkAgent.linkProperties.getInterfaceName(); 1526 1527 final int timeout; 1528 int type = ConnectivityManager.TYPE_NONE; 1529 1530 if (networkAgent.networkCapabilities.hasTransport( 1531 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1532 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1533 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1534 5); 1535 type = ConnectivityManager.TYPE_MOBILE; 1536 } else if (networkAgent.networkCapabilities.hasTransport( 1537 NetworkCapabilities.TRANSPORT_WIFI)) { 1538 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1539 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1540 5); 1541 type = ConnectivityManager.TYPE_WIFI; 1542 } else { 1543 // do not track any other networks 1544 timeout = 0; 1545 } 1546 1547 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1548 try { 1549 mNetd.addIdleTimer(iface, timeout, type); 1550 } catch (Exception e) { 1551 // You shall not crash! 1552 loge("Exception in setupDataActivityTracking " + e); 1553 } 1554 } 1555 } 1556 1557 /** 1558 * Remove data activity tracking when network disconnects. 1559 */ 1560 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1561 final String iface = networkAgent.linkProperties.getInterfaceName(); 1562 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1563 1564 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1565 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1566 try { 1567 // the call fails silently if no idletimer setup for this interface 1568 mNetd.removeIdleTimer(iface); 1569 } catch (Exception e) { 1570 loge("Exception in removeDataActivityTracking " + e); 1571 } 1572 } 1573 } 1574 1575 /** 1576 * Reads the network specific MTU size from reources. 1577 * and set it on it's iface. 1578 */ 1579 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1580 final String iface = newLp.getInterfaceName(); 1581 final int mtu = newLp.getMtu(); 1582 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1583 if (VDBG) log("identical MTU - not setting"); 1584 return; 1585 } 1586 1587 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1588 loge("Unexpected mtu value: " + mtu + ", " + iface); 1589 return; 1590 } 1591 1592 // Cannot set MTU without interface name 1593 if (TextUtils.isEmpty(iface)) { 1594 loge("Setting MTU size with null iface."); 1595 return; 1596 } 1597 1598 try { 1599 if (DBG) log("Setting MTU size: " + iface + ", " + mtu); 1600 mNetd.setMtu(iface, mtu); 1601 } catch (Exception e) { 1602 Slog.e(TAG, "exception in setMtu()" + e); 1603 } 1604 } 1605 1606 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1607 1608 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1609 if (isDefaultNetwork(nai) == false) { 1610 return; 1611 } 1612 1613 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1614 String[] values = null; 1615 if (tcpBufferSizes != null) { 1616 values = tcpBufferSizes.split(","); 1617 } 1618 1619 if (values == null || values.length != 6) { 1620 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1621 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1622 values = tcpBufferSizes.split(","); 1623 } 1624 1625 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1626 1627 try { 1628 if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1629 1630 final String prefix = "/sys/kernel/ipv4/tcp_"; 1631 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1632 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1633 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1634 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1635 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1636 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1637 mCurrentTcpBufferSizes = tcpBufferSizes; 1638 } catch (IOException e) { 1639 loge("Can't set TCP buffer sizes:" + e); 1640 } 1641 1642 final String defaultRwndKey = "net.tcp.default_init_rwnd"; 1643 int defaultRwndValue = SystemProperties.getInt(defaultRwndKey, 0); 1644 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1645 Settings.Global.TCP_DEFAULT_INIT_RWND, defaultRwndValue); 1646 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1647 if (rwndValue != 0) { 1648 SystemProperties.set(sysctlKey, rwndValue.toString()); 1649 } 1650 } 1651 1652 private void flushVmDnsCache() { 1653 /* 1654 * Tell the VMs to toss their DNS caches 1655 */ 1656 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1657 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1658 /* 1659 * Connectivity events can happen before boot has completed ... 1660 */ 1661 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1662 final long ident = Binder.clearCallingIdentity(); 1663 try { 1664 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1665 } finally { 1666 Binder.restoreCallingIdentity(ident); 1667 } 1668 } 1669 1670 @Override 1671 public int getRestoreDefaultNetworkDelay(int networkType) { 1672 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1673 NETWORK_RESTORE_DELAY_PROP_NAME); 1674 if(restoreDefaultNetworkDelayStr != null && 1675 restoreDefaultNetworkDelayStr.length() != 0) { 1676 try { 1677 return Integer.valueOf(restoreDefaultNetworkDelayStr); 1678 } catch (NumberFormatException e) { 1679 } 1680 } 1681 // if the system property isn't set, use the value for the apn type 1682 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1683 1684 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1685 (mNetConfigs[networkType] != null)) { 1686 ret = mNetConfigs[networkType].restoreTime; 1687 } 1688 return ret; 1689 } 1690 1691 @Override 1692 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1693 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1694 if (mContext.checkCallingOrSelfPermission( 1695 android.Manifest.permission.DUMP) 1696 != PackageManager.PERMISSION_GRANTED) { 1697 pw.println("Permission Denial: can't dump ConnectivityService " + 1698 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1699 Binder.getCallingUid()); 1700 return; 1701 } 1702 1703 pw.println("NetworkFactories for:"); 1704 pw.increaseIndent(); 1705 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1706 pw.println(nfi.name); 1707 } 1708 pw.decreaseIndent(); 1709 pw.println(); 1710 1711 NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId); 1712 pw.print("Active default network: "); 1713 if (defaultNai == null) { 1714 pw.println("none"); 1715 } else { 1716 pw.println(defaultNai.network.netId); 1717 } 1718 pw.println(); 1719 1720 pw.println("Current Networks:"); 1721 pw.increaseIndent(); 1722 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1723 pw.println(nai.toString()); 1724 pw.increaseIndent(); 1725 pw.println("Requests:"); 1726 pw.increaseIndent(); 1727 for (int i = 0; i < nai.networkRequests.size(); i++) { 1728 pw.println(nai.networkRequests.valueAt(i).toString()); 1729 } 1730 pw.decreaseIndent(); 1731 pw.println("Lingered:"); 1732 pw.increaseIndent(); 1733 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1734 pw.decreaseIndent(); 1735 pw.decreaseIndent(); 1736 } 1737 pw.decreaseIndent(); 1738 pw.println(); 1739 1740 pw.println("Network Requests:"); 1741 pw.increaseIndent(); 1742 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1743 pw.println(nri.toString()); 1744 } 1745 pw.println(); 1746 pw.decreaseIndent(); 1747 1748 pw.println("mLegacyTypeTracker:"); 1749 pw.increaseIndent(); 1750 mLegacyTypeTracker.dump(pw); 1751 pw.decreaseIndent(); 1752 pw.println(); 1753 1754 synchronized (this) { 1755 pw.println("NetworkTransitionWakeLock is currently " + 1756 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held."); 1757 pw.println("It was last requested for "+mNetTransitionWakeLockCausedBy); 1758 } 1759 pw.println(); 1760 1761 mTethering.dump(fd, pw, args); 1762 1763 if (mInetLog != null) { 1764 pw.println(); 1765 pw.println("Inet condition reports:"); 1766 pw.increaseIndent(); 1767 for(int i = 0; i < mInetLog.size(); i++) { 1768 pw.println(mInetLog.get(i)); 1769 } 1770 pw.decreaseIndent(); 1771 } 1772 } 1773 1774 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, String msg) { 1775 if (nai.network == null) return false; 1776 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1777 if (officialNai != null && officialNai.equals(nai)) return true; 1778 if (officialNai != null || VDBG) { 1779 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1780 " - " + nai); 1781 } 1782 return false; 1783 } 1784 1785 private boolean isRequest(NetworkRequest request) { 1786 return mNetworkRequests.get(request).isRequest; 1787 } 1788 1789 // must be stateless - things change under us. 1790 private class NetworkStateTrackerHandler extends Handler { 1791 public NetworkStateTrackerHandler(Looper looper) { 1792 super(looper); 1793 } 1794 1795 @Override 1796 public void handleMessage(Message msg) { 1797 NetworkInfo info; 1798 switch (msg.what) { 1799 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1800 handleAsyncChannelHalfConnect(msg); 1801 break; 1802 } 1803 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1804 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1805 if (nai != null) nai.asyncChannel.disconnect(); 1806 break; 1807 } 1808 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1809 handleAsyncChannelDisconnected(msg); 1810 break; 1811 } 1812 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1813 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1814 if (nai == null) { 1815 loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent"); 1816 } else { 1817 updateCapabilities(nai, (NetworkCapabilities)msg.obj); 1818 } 1819 break; 1820 } 1821 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1822 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1823 if (nai == null) { 1824 loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED"); 1825 } else { 1826 if (VDBG) { 1827 log("Update of LinkProperties for " + nai.name() + 1828 "; created=" + nai.created); 1829 } 1830 LinkProperties oldLp = nai.linkProperties; 1831 synchronized (nai) { 1832 nai.linkProperties = (LinkProperties)msg.obj; 1833 } 1834 if (nai.created) updateLinkProperties(nai, oldLp); 1835 } 1836 break; 1837 } 1838 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 1839 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1840 if (nai == null) { 1841 loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent"); 1842 break; 1843 } 1844 info = (NetworkInfo) msg.obj; 1845 updateNetworkInfo(nai, info); 1846 break; 1847 } 1848 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 1849 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1850 if (nai == null) { 1851 loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent"); 1852 break; 1853 } 1854 Integer score = (Integer) msg.obj; 1855 if (score != null) updateNetworkScore(nai, score.intValue()); 1856 break; 1857 } 1858 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 1859 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1860 if (nai == null) { 1861 loge("EVENT_UID_RANGES_ADDED from unknown NetworkAgent"); 1862 break; 1863 } 1864 try { 1865 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1866 } catch (Exception e) { 1867 // Never crash! 1868 loge("Exception in addVpnUidRanges: " + e); 1869 } 1870 break; 1871 } 1872 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 1873 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1874 if (nai == null) { 1875 loge("EVENT_UID_RANGES_REMOVED from unknown NetworkAgent"); 1876 break; 1877 } 1878 try { 1879 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 1880 } catch (Exception e) { 1881 // Never crash! 1882 loge("Exception in removeVpnUidRanges: " + e); 1883 } 1884 break; 1885 } 1886 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 1887 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1888 if (nai == null) { 1889 loge("EVENT_SET_EXPLICITLY_SELECTED from unknown NetworkAgent"); 1890 break; 1891 } 1892 if (nai.created && !nai.networkMisc.explicitlySelected) { 1893 loge("ERROR: created network explicitly selected."); 1894 } 1895 nai.networkMisc.explicitlySelected = true; 1896 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 1897 break; 1898 } 1899 case NetworkMonitor.EVENT_NETWORK_TESTED: { 1900 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 1901 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_VALIDATED")) { 1902 boolean valid = (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 1903 nai.lastValidated = valid; 1904 if (valid) { 1905 if (DBG) log("Validated " + nai.name()); 1906 if (!nai.everValidated) { 1907 nai.everValidated = true; 1908 rematchNetworkAndRequests(nai, NascentState.JUST_VALIDATED, 1909 ReapUnvalidatedNetworks.REAP); 1910 // If score has changed, rebroadcast to NetworkFactories. b/17726566 1911 sendUpdatedScoreToFactories(nai); 1912 } 1913 } 1914 updateInetCondition(nai); 1915 // Let the NetworkAgent know the state of its network 1916 nai.asyncChannel.sendMessage( 1917 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS, 1918 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 1919 0, null); 1920 1921 // TODO: trigger a NetworkCapabilities update so that the dialog can know 1922 // that the network is now validated and close itself. 1923 } 1924 break; 1925 } 1926 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 1927 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 1928 if (isLiveNetworkAgent(nai, "EVENT_NETWORK_LINGER_COMPLETE")) { 1929 handleLingerComplete(nai); 1930 } 1931 break; 1932 } 1933 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 1934 if (msg.arg1 == 0) { 1935 setProvNotificationVisibleIntent(false, msg.arg2, 0, null, null); 1936 } else { 1937 NetworkAgentInfo nai = null; 1938 synchronized (mNetworkForNetId) { 1939 nai = mNetworkForNetId.get(msg.arg2); 1940 } 1941 if (nai == null) { 1942 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 1943 break; 1944 } 1945 setProvNotificationVisibleIntent(true, msg.arg2, nai.networkInfo.getType(), 1946 nai.networkInfo.getExtraInfo(), (PendingIntent)msg.obj); 1947 } 1948 break; 1949 } 1950 } 1951 } 1952 } 1953 1954 // Cancel any lingering so the linger timeout doesn't teardown a network. 1955 // This should be called when a network begins satisfying a NetworkRequest. 1956 // Note: depending on what state the NetworkMonitor is in (e.g., 1957 // if it's awaiting captive portal login, or if validation failed), this 1958 // may trigger a re-evaluation of the network. 1959 private void unlinger(NetworkAgentInfo nai) { 1960 if (VDBG) log("Canceling linger of " + nai.name()); 1961 // If network has never been validated, it cannot have been lingered, so don't bother 1962 // needlessly triggering a re-evaluation. 1963 if (!nai.everValidated) return; 1964 nai.networkLingered.clear(); 1965 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 1966 } 1967 1968 private void handleAsyncChannelHalfConnect(Message msg) { 1969 AsyncChannel ac = (AsyncChannel) msg.obj; 1970 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 1971 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 1972 if (VDBG) log("NetworkFactory connected"); 1973 // A network factory has connected. Send it all current NetworkRequests. 1974 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1975 if (nri.isRequest == false) continue; 1976 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 1977 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 1978 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 1979 } 1980 } else { 1981 loge("Error connecting NetworkFactory"); 1982 mNetworkFactoryInfos.remove(msg.obj); 1983 } 1984 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 1985 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 1986 if (VDBG) log("NetworkAgent connected"); 1987 // A network agent has requested a connection. Establish the connection. 1988 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 1989 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 1990 } else { 1991 loge("Error connecting NetworkAgent"); 1992 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 1993 if (nai != null) { 1994 synchronized (mNetworkForNetId) { 1995 mNetworkForNetId.remove(nai.network.netId); 1996 mNetIdInUse.delete(nai.network.netId); 1997 } 1998 // Just in case. 1999 mLegacyTypeTracker.remove(nai); 2000 } 2001 } 2002 } 2003 } 2004 2005 private void handleAsyncChannelDisconnected(Message msg) { 2006 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2007 if (nai != null) { 2008 if (DBG) { 2009 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2010 } 2011 // A network agent has disconnected. 2012 if (nai.created) { 2013 // Tell netd to clean up the configuration for this network 2014 // (routing rules, DNS, etc). 2015 try { 2016 mNetd.removeNetwork(nai.network.netId); 2017 } catch (Exception e) { 2018 loge("Exception removing network: " + e); 2019 } 2020 } 2021 // TODO - if we move the logic to the network agent (have them disconnect 2022 // because they lost all their requests or because their score isn't good) 2023 // then they would disconnect organically, report their new state and then 2024 // disconnect the channel. 2025 if (nai.networkInfo.isConnected()) { 2026 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2027 null, null); 2028 } 2029 if (isDefaultNetwork(nai)) { 2030 mDefaultInetConditionPublished = 0; 2031 } 2032 notifyIfacesChanged(); 2033 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2034 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2035 mNetworkAgentInfos.remove(msg.replyTo); 2036 updateClat(null, nai.linkProperties, nai); 2037 mLegacyTypeTracker.remove(nai); 2038 synchronized (mNetworkForNetId) { 2039 mNetworkForNetId.remove(nai.network.netId); 2040 mNetIdInUse.delete(nai.network.netId); 2041 } 2042 // Since we've lost the network, go through all the requests that 2043 // it was satisfying and see if any other factory can satisfy them. 2044 // TODO: This logic may be better replaced with a call to rematchAllNetworksAndRequests 2045 final ArrayList<NetworkAgentInfo> toActivate = new ArrayList<NetworkAgentInfo>(); 2046 for (int i = 0; i < nai.networkRequests.size(); i++) { 2047 NetworkRequest request = nai.networkRequests.valueAt(i); 2048 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2049 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2050 if (DBG) { 2051 log("Checking for replacement network to handle request " + request ); 2052 } 2053 mNetworkForRequestId.remove(request.requestId); 2054 sendUpdatedScoreToFactories(request, 0); 2055 NetworkAgentInfo alternative = null; 2056 for (NetworkAgentInfo existing : mNetworkAgentInfos.values()) { 2057 if (existing.satisfies(request) && 2058 (alternative == null || 2059 alternative.getCurrentScore() < existing.getCurrentScore())) { 2060 alternative = existing; 2061 } 2062 } 2063 if (alternative != null) { 2064 if (DBG) log(" found replacement in " + alternative.name()); 2065 if (!toActivate.contains(alternative)) { 2066 toActivate.add(alternative); 2067 } 2068 } 2069 } 2070 } 2071 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2072 removeDataActivityTracking(nai); 2073 notifyLockdownVpn(nai); 2074 requestNetworkTransitionWakelock(nai.name()); 2075 } 2076 for (NetworkAgentInfo networkToActivate : toActivate) { 2077 unlinger(networkToActivate); 2078 rematchNetworkAndRequests(networkToActivate, NascentState.NOT_JUST_VALIDATED, 2079 ReapUnvalidatedNetworks.DONT_REAP); 2080 } 2081 } 2082 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2083 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2084 } 2085 2086 // If this method proves to be too slow then we can maintain a separate 2087 // pendingIntent => NetworkRequestInfo map. 2088 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2089 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2090 Intent intent = pendingIntent.getIntent(); 2091 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2092 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2093 if (existingPendingIntent != null && 2094 existingPendingIntent.getIntent().filterEquals(intent)) { 2095 return entry.getValue(); 2096 } 2097 } 2098 return null; 2099 } 2100 2101 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2102 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2103 2104 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2105 if (existingRequest != null) { // remove the existing request. 2106 if (DBG) log("Replacing " + existingRequest.request + " with " 2107 + nri.request + " because their intents matched."); 2108 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2109 } 2110 handleRegisterNetworkRequest(msg); 2111 } 2112 2113 private void handleRegisterNetworkRequest(Message msg) { 2114 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2115 2116 mNetworkRequests.put(nri.request, nri); 2117 2118 // TODO: This logic may be better replaced with a call to rematchNetworkAndRequests 2119 2120 // Check for the best currently alive network that satisfies this request 2121 NetworkAgentInfo bestNetwork = null; 2122 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2123 if (DBG) log("handleRegisterNetworkRequest checking " + network.name()); 2124 if (network.satisfies(nri.request)) { 2125 if (DBG) log("apparently satisfied. currentScore=" + network.getCurrentScore()); 2126 if (!nri.isRequest) { 2127 // Not setting bestNetwork here as a listening NetworkRequest may be 2128 // satisfied by multiple Networks. Instead the request is added to 2129 // each satisfying Network and notified about each. 2130 network.addRequest(nri.request); 2131 notifyNetworkCallback(network, nri); 2132 } else if (bestNetwork == null || 2133 bestNetwork.getCurrentScore() < network.getCurrentScore()) { 2134 bestNetwork = network; 2135 } 2136 } 2137 } 2138 if (bestNetwork != null) { 2139 if (DBG) log("using " + bestNetwork.name()); 2140 unlinger(bestNetwork); 2141 bestNetwork.addRequest(nri.request); 2142 mNetworkForRequestId.put(nri.request.requestId, bestNetwork); 2143 notifyNetworkCallback(bestNetwork, nri); 2144 if (nri.request.legacyType != TYPE_NONE) { 2145 mLegacyTypeTracker.add(nri.request.legacyType, bestNetwork); 2146 } 2147 } 2148 2149 if (nri.isRequest) { 2150 if (DBG) log("sending new NetworkRequest to factories"); 2151 final int score = bestNetwork == null ? 0 : bestNetwork.getCurrentScore(); 2152 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2153 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 2154 0, nri.request); 2155 } 2156 } 2157 } 2158 2159 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2160 int callingUid) { 2161 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2162 if (nri != null) { 2163 handleReleaseNetworkRequest(nri.request, callingUid); 2164 } 2165 } 2166 2167 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2168 // For validated Networks this is simply whether it is satsifying any NetworkRequests. 2169 // For unvalidated Networks this is whether it is satsifying any NetworkRequests or 2170 // were it to become validated, would it have a chance of satisfying any NetworkRequests. 2171 private boolean unneeded(NetworkAgentInfo nai) { 2172 if (!nai.created || nai.isVPN()) return false; 2173 boolean unneeded = true; 2174 if (nai.everValidated) { 2175 for (int i = 0; i < nai.networkRequests.size() && unneeded; i++) { 2176 final NetworkRequest nr = nai.networkRequests.valueAt(i); 2177 try { 2178 if (isRequest(nr)) unneeded = false; 2179 } catch (Exception e) { 2180 loge("Request " + nr + " not found in mNetworkRequests."); 2181 loge(" it came from request list of " + nai.name()); 2182 } 2183 } 2184 } else { 2185 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2186 // If this Network is already the highest scoring Network for a request, or if 2187 // there is hope for it to become one if it validated, then it is needed. 2188 if (nri.isRequest && nai.satisfies(nri.request) && 2189 (nai.networkRequests.get(nri.request.requestId) != null || 2190 // Note that this catches two important cases: 2191 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2192 // is currently satisfying the request. This is desirable when 2193 // cellular ends up validating but WiFi does not. 2194 // 2. Unvalidated WiFi will not be reaped when validated cellular 2195 // is currently satsifying the request. This is desirable when 2196 // WiFi ends up validating and out scoring cellular. 2197 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2198 nai.getCurrentScoreAsValidated())) { 2199 unneeded = false; 2200 break; 2201 } 2202 } 2203 } 2204 return unneeded; 2205 } 2206 2207 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2208 NetworkRequestInfo nri = mNetworkRequests.get(request); 2209 if (nri != null) { 2210 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2211 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2212 return; 2213 } 2214 if (DBG) log("releasing NetworkRequest " + request); 2215 nri.unlinkDeathRecipient(); 2216 mNetworkRequests.remove(request); 2217 if (nri.isRequest) { 2218 // Find all networks that are satisfying this request and remove the request 2219 // from their request lists. 2220 // TODO - it's my understanding that for a request there is only a single 2221 // network satisfying it, so this loop is wasteful 2222 boolean wasKept = false; 2223 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2224 if (nai.networkRequests.get(nri.request.requestId) != null) { 2225 nai.networkRequests.remove(nri.request.requestId); 2226 if (DBG) { 2227 log(" Removing from current network " + nai.name() + 2228 ", leaving " + nai.networkRequests.size() + 2229 " requests."); 2230 } 2231 if (unneeded(nai)) { 2232 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2233 teardownUnneededNetwork(nai); 2234 } else { 2235 // suspect there should only be one pass through here 2236 // but if any were kept do the check below 2237 wasKept |= true; 2238 } 2239 } 2240 } 2241 2242 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2243 if (nai != null) { 2244 mNetworkForRequestId.remove(nri.request.requestId); 2245 } 2246 // Maintain the illusion. When this request arrived, we might have pretended 2247 // that a network connected to serve it, even though the network was already 2248 // connected. Now that this request has gone away, we might have to pretend 2249 // that the network disconnected. LegacyTypeTracker will generate that 2250 // phantom disconnect for this type. 2251 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2252 boolean doRemove = true; 2253 if (wasKept) { 2254 // check if any of the remaining requests for this network are for the 2255 // same legacy type - if so, don't remove the nai 2256 for (int i = 0; i < nai.networkRequests.size(); i++) { 2257 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2258 if (otherRequest.legacyType == nri.request.legacyType && 2259 isRequest(otherRequest)) { 2260 if (DBG) log(" still have other legacy request - leaving"); 2261 doRemove = false; 2262 } 2263 } 2264 } 2265 2266 if (doRemove) { 2267 mLegacyTypeTracker.remove(nri.request.legacyType, nai); 2268 } 2269 } 2270 2271 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2272 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2273 nri.request); 2274 } 2275 } else { 2276 // listens don't have a singular affectedNetwork. Check all networks to see 2277 // if this listen request applies and remove it. 2278 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2279 nai.networkRequests.remove(nri.request.requestId); 2280 } 2281 } 2282 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2283 } 2284 } 2285 2286 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2287 enforceConnectivityInternalPermission(); 2288 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2289 accept ? 1 : 0, always ? 1: 0, network)); 2290 } 2291 2292 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2293 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2294 " accept=" + accept + " always=" + always); 2295 2296 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2297 if (nai == null) { 2298 // Nothing to do. 2299 return; 2300 } 2301 2302 if (nai.everValidated) { 2303 // The network validated while the dialog box was up. Don't make any changes. There's a 2304 // TODO in the dialog code to make it go away if the network validates; once that's 2305 // implemented, taking action here will be confusing. 2306 return; 2307 } 2308 2309 if (!nai.networkMisc.explicitlySelected) { 2310 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2311 } 2312 2313 if (accept != nai.networkMisc.acceptUnvalidated) { 2314 int oldScore = nai.getCurrentScore(); 2315 nai.networkMisc.acceptUnvalidated = accept; 2316 rematchAllNetworksAndRequests(nai, oldScore); 2317 sendUpdatedScoreToFactories(nai); 2318 } 2319 2320 if (always) { 2321 nai.asyncChannel.sendMessage( 2322 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2323 } 2324 2325 // TODO: should we also disconnect from the network if accept is false? 2326 } 2327 2328 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2329 mHandler.sendMessageDelayed( 2330 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2331 PROMPT_UNVALIDATED_DELAY_MS); 2332 } 2333 2334 private void handlePromptUnvalidated(Network network) { 2335 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2336 2337 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2338 // we haven't already been told to switch to it regardless of whether it validated or not. 2339 if (nai == null || nai.everValidated || 2340 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2341 return; 2342 } 2343 2344 // TODO: What should we do if we've already switched to this network because we had no 2345 // better option? There are two obvious alternatives. 2346 // 2347 // 1. Decide that there's no point prompting because this is our only usable network. 2348 // However, because we didn't prompt, if later on a validated network comes along, we'll 2349 // either a) silently switch to it - bad if the user wanted to connect to stay on this 2350 // unvalidated network - or b) prompt the user at that later time - bad because the user 2351 // might not understand why they are now being prompted. 2352 // 2353 // 2. Always prompt the user, even if we have no other network to use. The user could then 2354 // try to find an alternative network to join (remember, if we got here, then the user 2355 // selected this network manually). This is bad because the prompt isn't really very 2356 // useful. 2357 // 2358 // For now we do #1, but we can revisit that later. 2359 if (isDefaultNetwork(nai)) { 2360 return; 2361 } 2362 2363 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2364 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, network); 2365 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2366 intent.setClassName("com.android.settings", 2367 "com.android.settings.wifi.WifiNoInternetDialog"); 2368 mContext.startActivityAsUser(intent, UserHandle.CURRENT); 2369 } 2370 2371 private class InternalHandler extends Handler { 2372 public InternalHandler(Looper looper) { 2373 super(looper); 2374 } 2375 2376 @Override 2377 public void handleMessage(Message msg) { 2378 switch (msg.what) { 2379 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2380 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2381 String causedBy = null; 2382 synchronized (ConnectivityService.this) { 2383 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2384 mNetTransitionWakeLock.isHeld()) { 2385 mNetTransitionWakeLock.release(); 2386 causedBy = mNetTransitionWakeLockCausedBy; 2387 } else { 2388 break; 2389 } 2390 } 2391 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2392 log("Failed to find a new network - expiring NetTransition Wakelock"); 2393 } else { 2394 log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + 2395 " cleared because we found a replacement network"); 2396 } 2397 break; 2398 } 2399 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2400 handleDeprecatedGlobalHttpProxy(); 2401 break; 2402 } 2403 case EVENT_SEND_STICKY_BROADCAST_INTENT: { 2404 Intent intent = (Intent)msg.obj; 2405 sendStickyBroadcast(intent); 2406 break; 2407 } 2408 case EVENT_PROXY_HAS_CHANGED: { 2409 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2410 break; 2411 } 2412 case EVENT_REGISTER_NETWORK_FACTORY: { 2413 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2414 break; 2415 } 2416 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2417 handleUnregisterNetworkFactory((Messenger)msg.obj); 2418 break; 2419 } 2420 case EVENT_REGISTER_NETWORK_AGENT: { 2421 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2422 break; 2423 } 2424 case EVENT_REGISTER_NETWORK_REQUEST: 2425 case EVENT_REGISTER_NETWORK_LISTENER: { 2426 handleRegisterNetworkRequest(msg); 2427 break; 2428 } 2429 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: { 2430 handleRegisterNetworkRequestWithIntent(msg); 2431 break; 2432 } 2433 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2434 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2435 break; 2436 } 2437 case EVENT_RELEASE_NETWORK_REQUEST: { 2438 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2439 break; 2440 } 2441 case EVENT_SET_ACCEPT_UNVALIDATED: { 2442 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2443 break; 2444 } 2445 case EVENT_PROMPT_UNVALIDATED: { 2446 handlePromptUnvalidated((Network) msg.obj); 2447 break; 2448 } 2449 case EVENT_SYSTEM_READY: { 2450 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2451 nai.networkMonitor.systemReady = true; 2452 } 2453 break; 2454 } 2455 } 2456 } 2457 } 2458 2459 // javadoc from interface 2460 public int tether(String iface) { 2461 ConnectivityManager.enforceTetherChangePermission(mContext); 2462 if (isTetheringSupported()) { 2463 return mTethering.tether(iface); 2464 } else { 2465 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2466 } 2467 } 2468 2469 // javadoc from interface 2470 public int untether(String iface) { 2471 ConnectivityManager.enforceTetherChangePermission(mContext); 2472 2473 if (isTetheringSupported()) { 2474 return mTethering.untether(iface); 2475 } else { 2476 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2477 } 2478 } 2479 2480 // javadoc from interface 2481 public int getLastTetherError(String iface) { 2482 enforceTetherAccessPermission(); 2483 2484 if (isTetheringSupported()) { 2485 return mTethering.getLastTetherError(iface); 2486 } else { 2487 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2488 } 2489 } 2490 2491 // TODO - proper iface API for selection by property, inspection, etc 2492 public String[] getTetherableUsbRegexs() { 2493 enforceTetherAccessPermission(); 2494 if (isTetheringSupported()) { 2495 return mTethering.getTetherableUsbRegexs(); 2496 } else { 2497 return new String[0]; 2498 } 2499 } 2500 2501 public String[] getTetherableWifiRegexs() { 2502 enforceTetherAccessPermission(); 2503 if (isTetheringSupported()) { 2504 return mTethering.getTetherableWifiRegexs(); 2505 } else { 2506 return new String[0]; 2507 } 2508 } 2509 2510 public String[] getTetherableBluetoothRegexs() { 2511 enforceTetherAccessPermission(); 2512 if (isTetheringSupported()) { 2513 return mTethering.getTetherableBluetoothRegexs(); 2514 } else { 2515 return new String[0]; 2516 } 2517 } 2518 2519 public int setUsbTethering(boolean enable) { 2520 ConnectivityManager.enforceTetherChangePermission(mContext); 2521 if (isTetheringSupported()) { 2522 return mTethering.setUsbTethering(enable); 2523 } else { 2524 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2525 } 2526 } 2527 2528 // TODO - move iface listing, queries, etc to new module 2529 // javadoc from interface 2530 public String[] getTetherableIfaces() { 2531 enforceTetherAccessPermission(); 2532 return mTethering.getTetherableIfaces(); 2533 } 2534 2535 public String[] getTetheredIfaces() { 2536 enforceTetherAccessPermission(); 2537 return mTethering.getTetheredIfaces(); 2538 } 2539 2540 public String[] getTetheringErroredIfaces() { 2541 enforceTetherAccessPermission(); 2542 return mTethering.getErroredIfaces(); 2543 } 2544 2545 public String[] getTetheredDhcpRanges() { 2546 enforceConnectivityInternalPermission(); 2547 return mTethering.getTetheredDhcpRanges(); 2548 } 2549 2550 // if ro.tether.denied = true we default to no tethering 2551 // gservices could set the secure setting to 1 though to enable it on a build where it 2552 // had previously been turned off. 2553 public boolean isTetheringSupported() { 2554 enforceTetherAccessPermission(); 2555 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2556 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2557 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2558 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2559 return tetherEnabledInSettings && ((mTethering.getTetherableUsbRegexs().length != 0 || 2560 mTethering.getTetherableWifiRegexs().length != 0 || 2561 mTethering.getTetherableBluetoothRegexs().length != 0) && 2562 mTethering.getUpstreamIfaceTypes().length != 0); 2563 } 2564 2565 // Called when we lose the default network and have no replacement yet. 2566 // This will automatically be cleared after X seconds or a new default network 2567 // becomes CONNECTED, whichever happens first. The timer is started by the 2568 // first caller and not restarted by subsequent callers. 2569 private void requestNetworkTransitionWakelock(String forWhom) { 2570 int serialNum = 0; 2571 synchronized (this) { 2572 if (mNetTransitionWakeLock.isHeld()) return; 2573 serialNum = ++mNetTransitionWakeLockSerialNumber; 2574 mNetTransitionWakeLock.acquire(); 2575 mNetTransitionWakeLockCausedBy = forWhom; 2576 } 2577 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2578 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2579 mNetTransitionWakeLockTimeout); 2580 return; 2581 } 2582 2583 // 100 percent is full good, 0 is full bad. 2584 public void reportInetCondition(int networkType, int percentage) { 2585 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2586 if (nai == null) return; 2587 reportNetworkConnectivity(nai.network, percentage > 50); 2588 } 2589 2590 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2591 enforceAccessPermission(); 2592 enforceInternetPermission(); 2593 2594 NetworkAgentInfo nai; 2595 if (network == null) { 2596 nai = getDefaultNetwork(); 2597 } else { 2598 nai = getNetworkAgentInfoForNetwork(network); 2599 } 2600 if (nai == null) return; 2601 // Revalidate if the app report does not match our current validated state. 2602 if (hasConnectivity == nai.lastValidated) return; 2603 final int uid = Binder.getCallingUid(); 2604 if (DBG) { 2605 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2606 ") by " + uid); 2607 } 2608 synchronized (nai) { 2609 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2610 // which isn't meant to work on uncreated networks. 2611 if (!nai.created) return; 2612 2613 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid)) return; 2614 2615 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2616 } 2617 } 2618 2619 public void captivePortalAppResponse(Network network, int response, String actionToken) { 2620 if (response == ConnectivityManager.CAPTIVE_PORTAL_APP_RETURN_WANTED_AS_IS) { 2621 enforceConnectivityInternalPermission(); 2622 } 2623 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2624 if (nai == null) return; 2625 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_CAPTIVE_PORTAL_APP_FINISHED, response, 0, 2626 actionToken); 2627 } 2628 2629 public ProxyInfo getDefaultProxy() { 2630 // this information is already available as a world read/writable jvm property 2631 // so this API change wouldn't have a benifit. It also breaks the passing 2632 // of proxy info to all the JVMs. 2633 // enforceAccessPermission(); 2634 synchronized (mProxyLock) { 2635 ProxyInfo ret = mGlobalProxy; 2636 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2637 return ret; 2638 } 2639 } 2640 2641 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2642 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2643 // proxy is null then there is no proxy in place). 2644 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2645 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2646 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2647 proxy = null; 2648 } 2649 return proxy; 2650 } 2651 2652 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2653 // better for determining if a new proxy broadcast is necessary: 2654 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2655 // avoid unnecessary broadcasts. 2656 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2657 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2658 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2659 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2660 // all set. 2661 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2662 a = canonicalizeProxyInfo(a); 2663 b = canonicalizeProxyInfo(b); 2664 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2665 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2666 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2667 } 2668 2669 public void setGlobalProxy(ProxyInfo proxyProperties) { 2670 enforceConnectivityInternalPermission(); 2671 2672 synchronized (mProxyLock) { 2673 if (proxyProperties == mGlobalProxy) return; 2674 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2675 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2676 2677 String host = ""; 2678 int port = 0; 2679 String exclList = ""; 2680 String pacFileUrl = ""; 2681 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2682 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2683 if (!proxyProperties.isValid()) { 2684 if (DBG) 2685 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2686 return; 2687 } 2688 mGlobalProxy = new ProxyInfo(proxyProperties); 2689 host = mGlobalProxy.getHost(); 2690 port = mGlobalProxy.getPort(); 2691 exclList = mGlobalProxy.getExclusionListAsString(); 2692 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2693 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2694 } 2695 } else { 2696 mGlobalProxy = null; 2697 } 2698 ContentResolver res = mContext.getContentResolver(); 2699 final long token = Binder.clearCallingIdentity(); 2700 try { 2701 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2702 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2703 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2704 exclList); 2705 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2706 } finally { 2707 Binder.restoreCallingIdentity(token); 2708 } 2709 2710 if (mGlobalProxy == null) { 2711 proxyProperties = mDefaultProxy; 2712 } 2713 sendProxyBroadcast(proxyProperties); 2714 } 2715 } 2716 2717 private void loadGlobalProxy() { 2718 ContentResolver res = mContext.getContentResolver(); 2719 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2720 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2721 String exclList = Settings.Global.getString(res, 2722 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2723 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2724 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2725 ProxyInfo proxyProperties; 2726 if (!TextUtils.isEmpty(pacFileUrl)) { 2727 proxyProperties = new ProxyInfo(pacFileUrl); 2728 } else { 2729 proxyProperties = new ProxyInfo(host, port, exclList); 2730 } 2731 if (!proxyProperties.isValid()) { 2732 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2733 return; 2734 } 2735 2736 synchronized (mProxyLock) { 2737 mGlobalProxy = proxyProperties; 2738 } 2739 } 2740 } 2741 2742 public ProxyInfo getGlobalProxy() { 2743 // this information is already available as a world read/writable jvm property 2744 // so this API change wouldn't have a benifit. It also breaks the passing 2745 // of proxy info to all the JVMs. 2746 // enforceAccessPermission(); 2747 synchronized (mProxyLock) { 2748 return mGlobalProxy; 2749 } 2750 } 2751 2752 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2753 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2754 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2755 proxy = null; 2756 } 2757 synchronized (mProxyLock) { 2758 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2759 if (mDefaultProxy == proxy) return; // catches repeated nulls 2760 if (proxy != null && !proxy.isValid()) { 2761 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2762 return; 2763 } 2764 2765 // This call could be coming from the PacManager, containing the port of the local 2766 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2767 // global (to get the correct local port), and send a broadcast. 2768 // TODO: Switch PacManager to have its own message to send back rather than 2769 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2770 if ((mGlobalProxy != null) && (proxy != null) 2771 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2772 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2773 mGlobalProxy = proxy; 2774 sendProxyBroadcast(mGlobalProxy); 2775 return; 2776 } 2777 mDefaultProxy = proxy; 2778 2779 if (mGlobalProxy != null) return; 2780 if (!mDefaultProxyDisabled) { 2781 sendProxyBroadcast(proxy); 2782 } 2783 } 2784 } 2785 2786 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2787 // This method gets called when any network changes proxy, but the broadcast only ever contains 2788 // the default proxy (even if it hasn't changed). 2789 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2790 // world where an app might be bound to a non-default network. 2791 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2792 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2793 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2794 2795 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2796 sendProxyBroadcast(getDefaultProxy()); 2797 } 2798 } 2799 2800 private void handleDeprecatedGlobalHttpProxy() { 2801 String proxy = Settings.Global.getString(mContext.getContentResolver(), 2802 Settings.Global.HTTP_PROXY); 2803 if (!TextUtils.isEmpty(proxy)) { 2804 String data[] = proxy.split(":"); 2805 if (data.length == 0) { 2806 return; 2807 } 2808 2809 String proxyHost = data[0]; 2810 int proxyPort = 8080; 2811 if (data.length > 1) { 2812 try { 2813 proxyPort = Integer.parseInt(data[1]); 2814 } catch (NumberFormatException e) { 2815 return; 2816 } 2817 } 2818 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 2819 setGlobalProxy(p); 2820 } 2821 } 2822 2823 private void sendProxyBroadcast(ProxyInfo proxy) { 2824 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 2825 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 2826 if (DBG) log("sending Proxy Broadcast for " + proxy); 2827 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 2828 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 2829 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 2830 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 2831 final long ident = Binder.clearCallingIdentity(); 2832 try { 2833 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 2834 } finally { 2835 Binder.restoreCallingIdentity(ident); 2836 } 2837 } 2838 2839 private static class SettingsObserver extends ContentObserver { 2840 private int mWhat; 2841 private Handler mHandler; 2842 SettingsObserver(Handler handler, int what) { 2843 super(handler); 2844 mHandler = handler; 2845 mWhat = what; 2846 } 2847 2848 void observe(Context context) { 2849 ContentResolver resolver = context.getContentResolver(); 2850 resolver.registerContentObserver(Settings.Global.getUriFor( 2851 Settings.Global.HTTP_PROXY), false, this); 2852 } 2853 2854 @Override 2855 public void onChange(boolean selfChange) { 2856 mHandler.obtainMessage(mWhat).sendToTarget(); 2857 } 2858 } 2859 2860 private static void log(String s) { 2861 Slog.d(TAG, s); 2862 } 2863 2864 private static void loge(String s) { 2865 Slog.e(TAG, s); 2866 } 2867 2868 private static <T> T checkNotNull(T value, String message) { 2869 if (value == null) { 2870 throw new NullPointerException(message); 2871 } 2872 return value; 2873 } 2874 2875 /** 2876 * Prepare for a VPN application. 2877 * Permissions are checked in Vpn class. 2878 * @hide 2879 */ 2880 @Override 2881 public boolean prepareVpn(String oldPackage, String newPackage) { 2882 throwIfLockdownEnabled(); 2883 int user = UserHandle.getUserId(Binder.getCallingUid()); 2884 synchronized(mVpns) { 2885 return mVpns.get(user).prepare(oldPackage, newPackage); 2886 } 2887 } 2888 2889 /** 2890 * Set whether the current VPN package has the ability to launch VPNs without 2891 * user intervention. This method is used by system-privileged apps. 2892 * Permissions are checked in Vpn class. 2893 * @hide 2894 */ 2895 @Override 2896 public void setVpnPackageAuthorization(boolean authorized) { 2897 int user = UserHandle.getUserId(Binder.getCallingUid()); 2898 synchronized(mVpns) { 2899 mVpns.get(user).setPackageAuthorization(authorized); 2900 } 2901 } 2902 2903 /** 2904 * Configure a TUN interface and return its file descriptor. Parameters 2905 * are encoded and opaque to this class. This method is used by VpnBuilder 2906 * and not available in ConnectivityManager. Permissions are checked in 2907 * Vpn class. 2908 * @hide 2909 */ 2910 @Override 2911 public ParcelFileDescriptor establishVpn(VpnConfig config) { 2912 throwIfLockdownEnabled(); 2913 int user = UserHandle.getUserId(Binder.getCallingUid()); 2914 synchronized(mVpns) { 2915 return mVpns.get(user).establish(config); 2916 } 2917 } 2918 2919 /** 2920 * Start legacy VPN, controlling native daemons as needed. Creates a 2921 * secondary thread to perform connection work, returning quickly. 2922 */ 2923 @Override 2924 public void startLegacyVpn(VpnProfile profile) { 2925 throwIfLockdownEnabled(); 2926 final LinkProperties egress = getActiveLinkProperties(); 2927 if (egress == null) { 2928 throw new IllegalStateException("Missing active network connection"); 2929 } 2930 int user = UserHandle.getUserId(Binder.getCallingUid()); 2931 synchronized(mVpns) { 2932 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 2933 } 2934 } 2935 2936 /** 2937 * Return the information of the ongoing legacy VPN. This method is used 2938 * by VpnSettings and not available in ConnectivityManager. Permissions 2939 * are checked in Vpn class. 2940 */ 2941 @Override 2942 public LegacyVpnInfo getLegacyVpnInfo() { 2943 throwIfLockdownEnabled(); 2944 int user = UserHandle.getUserId(Binder.getCallingUid()); 2945 synchronized(mVpns) { 2946 return mVpns.get(user).getLegacyVpnInfo(); 2947 } 2948 } 2949 2950 /** 2951 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 2952 * and not available in ConnectivityManager. 2953 */ 2954 @Override 2955 public VpnInfo[] getAllVpnInfo() { 2956 enforceConnectivityInternalPermission(); 2957 if (mLockdownEnabled) { 2958 return new VpnInfo[0]; 2959 } 2960 2961 synchronized(mVpns) { 2962 List<VpnInfo> infoList = new ArrayList<>(); 2963 for (int i = 0; i < mVpns.size(); i++) { 2964 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 2965 if (info != null) { 2966 infoList.add(info); 2967 } 2968 } 2969 return infoList.toArray(new VpnInfo[infoList.size()]); 2970 } 2971 } 2972 2973 /** 2974 * @return VPN information for accounting, or null if we can't retrieve all required 2975 * information, e.g primary underlying iface. 2976 */ 2977 @Nullable 2978 private VpnInfo createVpnInfo(Vpn vpn) { 2979 VpnInfo info = vpn.getVpnInfo(); 2980 if (info == null) { 2981 return null; 2982 } 2983 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 2984 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 2985 // the underlyingNetworks list. 2986 if (underlyingNetworks == null) { 2987 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 2988 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 2989 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 2990 } 2991 } else if (underlyingNetworks.length > 0) { 2992 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 2993 if (linkProperties != null) { 2994 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 2995 } 2996 } 2997 return info.primaryUnderlyingIface == null ? null : info; 2998 } 2999 3000 /** 3001 * Returns the information of the ongoing VPN. This method is used by VpnDialogs and 3002 * not available in ConnectivityManager. 3003 * Permissions are checked in Vpn class. 3004 * @hide 3005 */ 3006 @Override 3007 public VpnConfig getVpnConfig() { 3008 int user = UserHandle.getUserId(Binder.getCallingUid()); 3009 synchronized(mVpns) { 3010 return mVpns.get(user).getVpnConfig(); 3011 } 3012 } 3013 3014 @Override 3015 public boolean updateLockdownVpn() { 3016 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3017 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3018 return false; 3019 } 3020 3021 // Tear down existing lockdown if profile was removed 3022 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3023 if (mLockdownEnabled) { 3024 if (!mKeyStore.isUnlocked()) { 3025 Slog.w(TAG, "KeyStore locked; unable to create LockdownTracker"); 3026 return false; 3027 } 3028 3029 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3030 final VpnProfile profile = VpnProfile.decode( 3031 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3032 int user = UserHandle.getUserId(Binder.getCallingUid()); 3033 synchronized(mVpns) { 3034 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, mVpns.get(user), 3035 profile)); 3036 } 3037 } else { 3038 setLockdownTracker(null); 3039 } 3040 3041 return true; 3042 } 3043 3044 /** 3045 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3046 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3047 */ 3048 private void setLockdownTracker(LockdownVpnTracker tracker) { 3049 // Shutdown any existing tracker 3050 final LockdownVpnTracker existing = mLockdownTracker; 3051 mLockdownTracker = null; 3052 if (existing != null) { 3053 existing.shutdown(); 3054 } 3055 3056 try { 3057 if (tracker != null) { 3058 mNetd.setFirewallEnabled(true); 3059 mNetd.setFirewallInterfaceRule("lo", true); 3060 mLockdownTracker = tracker; 3061 mLockdownTracker.init(); 3062 } else { 3063 mNetd.setFirewallEnabled(false); 3064 } 3065 } catch (RemoteException e) { 3066 // ignored; NMS lives inside system_server 3067 } 3068 } 3069 3070 private void throwIfLockdownEnabled() { 3071 if (mLockdownEnabled) { 3072 throw new IllegalStateException("Unavailable in lockdown mode"); 3073 } 3074 } 3075 3076 @Override 3077 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3078 // TODO: Remove? Any reason to trigger a provisioning check? 3079 return -1; 3080 } 3081 3082 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3083 private volatile boolean mIsNotificationVisible = false; 3084 3085 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3086 if (DBG) { 3087 log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType 3088 + " action=" + action); 3089 } 3090 Intent intent = new Intent(action); 3091 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3092 // Concatenate the range of types onto the range of NetIDs. 3093 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3094 setProvNotificationVisibleIntent(visible, id, networkType, null, pendingIntent); 3095 } 3096 3097 /** 3098 * Show or hide network provisioning notificaitons. 3099 * 3100 * @param id an identifier that uniquely identifies this notification. This must match 3101 * between show and hide calls. We use the NetID value but for legacy callers 3102 * we concatenate the range of types with the range of NetIDs. 3103 */ 3104 private void setProvNotificationVisibleIntent(boolean visible, int id, int networkType, 3105 String extraInfo, PendingIntent intent) { 3106 if (DBG) { 3107 log("setProvNotificationVisibleIntent: E visible=" + visible + " networkType=" + 3108 networkType + " extraInfo=" + extraInfo); 3109 } 3110 3111 Resources r = Resources.getSystem(); 3112 NotificationManager notificationManager = (NotificationManager) mContext 3113 .getSystemService(Context.NOTIFICATION_SERVICE); 3114 3115 if (visible) { 3116 CharSequence title; 3117 CharSequence details; 3118 int icon; 3119 Notification notification = new Notification(); 3120 switch (networkType) { 3121 case ConnectivityManager.TYPE_WIFI: 3122 title = r.getString(R.string.wifi_available_sign_in, 0); 3123 details = r.getString(R.string.network_available_sign_in_detailed, 3124 extraInfo); 3125 icon = R.drawable.stat_notify_wifi_in_range; 3126 break; 3127 case ConnectivityManager.TYPE_MOBILE: 3128 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3129 title = r.getString(R.string.network_available_sign_in, 0); 3130 // TODO: Change this to pull from NetworkInfo once a printable 3131 // name has been added to it 3132 details = mTelephonyManager.getNetworkOperatorName(); 3133 icon = R.drawable.stat_notify_rssi_in_range; 3134 break; 3135 default: 3136 title = r.getString(R.string.network_available_sign_in, 0); 3137 details = r.getString(R.string.network_available_sign_in_detailed, 3138 extraInfo); 3139 icon = R.drawable.stat_notify_rssi_in_range; 3140 break; 3141 } 3142 3143 notification.when = 0; 3144 notification.icon = icon; 3145 notification.flags = Notification.FLAG_AUTO_CANCEL; 3146 notification.tickerText = title; 3147 notification.color = mContext.getColor( 3148 com.android.internal.R.color.system_notification_accent_color); 3149 notification.setLatestEventInfo(mContext, title, details, notification.contentIntent); 3150 notification.contentIntent = intent; 3151 3152 try { 3153 notificationManager.notify(NOTIFICATION_ID, id, notification); 3154 } catch (NullPointerException npe) { 3155 loge("setNotificaitionVisible: visible notificationManager npe=" + npe); 3156 npe.printStackTrace(); 3157 } 3158 } else { 3159 try { 3160 notificationManager.cancel(NOTIFICATION_ID, id); 3161 } catch (NullPointerException npe) { 3162 loge("setNotificaitionVisible: cancel notificationManager npe=" + npe); 3163 npe.printStackTrace(); 3164 } 3165 } 3166 mIsNotificationVisible = visible; 3167 } 3168 3169 /** Location to an updatable file listing carrier provisioning urls. 3170 * An example: 3171 * 3172 * <?xml version="1.0" encoding="utf-8"?> 3173 * <provisioningUrls> 3174 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3175 * <redirectedUrl mcc="310" mnc="4">http://www.google.com</redirectedUrl> 3176 * </provisioningUrls> 3177 */ 3178 private static final String PROVISIONING_URL_PATH = 3179 "/data/misc/radio/provisioning_urls.xml"; 3180 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3181 3182 /** XML tag for root element. */ 3183 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3184 /** XML tag for individual url */ 3185 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3186 /** XML tag for redirected url */ 3187 private static final String TAG_REDIRECTED_URL = "redirectedUrl"; 3188 /** XML attribute for mcc */ 3189 private static final String ATTR_MCC = "mcc"; 3190 /** XML attribute for mnc */ 3191 private static final String ATTR_MNC = "mnc"; 3192 3193 private static final int REDIRECTED_PROVISIONING = 1; 3194 private static final int PROVISIONING = 2; 3195 3196 private String getProvisioningUrlBaseFromFile(int type) { 3197 FileReader fileReader = null; 3198 XmlPullParser parser = null; 3199 Configuration config = mContext.getResources().getConfiguration(); 3200 String tagType; 3201 3202 switch (type) { 3203 case PROVISIONING: 3204 tagType = TAG_PROVISIONING_URL; 3205 break; 3206 case REDIRECTED_PROVISIONING: 3207 tagType = TAG_REDIRECTED_URL; 3208 break; 3209 default: 3210 throw new RuntimeException("getProvisioningUrlBaseFromFile: Unexpected parameter " + 3211 type); 3212 } 3213 3214 try { 3215 fileReader = new FileReader(mProvisioningUrlFile); 3216 parser = Xml.newPullParser(); 3217 parser.setInput(fileReader); 3218 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3219 3220 while (true) { 3221 XmlUtils.nextElement(parser); 3222 3223 String element = parser.getName(); 3224 if (element == null) break; 3225 3226 if (element.equals(tagType)) { 3227 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3228 try { 3229 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3230 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3231 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3232 parser.next(); 3233 if (parser.getEventType() == XmlPullParser.TEXT) { 3234 return parser.getText(); 3235 } 3236 } 3237 } 3238 } catch (NumberFormatException e) { 3239 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3240 } 3241 } 3242 } 3243 return null; 3244 } catch (FileNotFoundException e) { 3245 loge("Carrier Provisioning Urls file not found"); 3246 } catch (XmlPullParserException e) { 3247 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3248 } catch (IOException e) { 3249 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3250 } finally { 3251 if (fileReader != null) { 3252 try { 3253 fileReader.close(); 3254 } catch (IOException e) {} 3255 } 3256 } 3257 return null; 3258 } 3259 3260 @Override 3261 public String getMobileRedirectedProvisioningUrl() { 3262 enforceConnectivityInternalPermission(); 3263 String url = getProvisioningUrlBaseFromFile(REDIRECTED_PROVISIONING); 3264 if (TextUtils.isEmpty(url)) { 3265 url = mContext.getResources().getString(R.string.mobile_redirected_provisioning_url); 3266 } 3267 return url; 3268 } 3269 3270 @Override 3271 public String getMobileProvisioningUrl() { 3272 enforceConnectivityInternalPermission(); 3273 String url = getProvisioningUrlBaseFromFile(PROVISIONING); 3274 if (TextUtils.isEmpty(url)) { 3275 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3276 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3277 } else { 3278 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3279 } 3280 // populate the iccid, imei and phone number in the provisioning url. 3281 if (!TextUtils.isEmpty(url)) { 3282 String phoneNumber = mTelephonyManager.getLine1Number(); 3283 if (TextUtils.isEmpty(phoneNumber)) { 3284 phoneNumber = "0000000000"; 3285 } 3286 url = String.format(url, 3287 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3288 mTelephonyManager.getDeviceId() /* IMEI */, 3289 phoneNumber /* Phone numer */); 3290 } 3291 3292 return url; 3293 } 3294 3295 @Override 3296 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3297 String action) { 3298 enforceConnectivityInternalPermission(); 3299 final long ident = Binder.clearCallingIdentity(); 3300 try { 3301 setProvNotificationVisible(visible, networkType, action); 3302 } finally { 3303 Binder.restoreCallingIdentity(ident); 3304 } 3305 } 3306 3307 @Override 3308 public void setAirplaneMode(boolean enable) { 3309 enforceConnectivityInternalPermission(); 3310 final long ident = Binder.clearCallingIdentity(); 3311 try { 3312 final ContentResolver cr = mContext.getContentResolver(); 3313 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3314 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3315 intent.putExtra("state", enable); 3316 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3317 } finally { 3318 Binder.restoreCallingIdentity(ident); 3319 } 3320 } 3321 3322 private void onUserStart(int userId) { 3323 synchronized(mVpns) { 3324 Vpn userVpn = mVpns.get(userId); 3325 if (userVpn != null) { 3326 loge("Starting user already has a VPN"); 3327 return; 3328 } 3329 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3330 mVpns.put(userId, userVpn); 3331 } 3332 } 3333 3334 private void onUserStop(int userId) { 3335 synchronized(mVpns) { 3336 Vpn userVpn = mVpns.get(userId); 3337 if (userVpn == null) { 3338 loge("Stopping user has no VPN"); 3339 return; 3340 } 3341 mVpns.delete(userId); 3342 } 3343 } 3344 3345 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3346 @Override 3347 public void onReceive(Context context, Intent intent) { 3348 final String action = intent.getAction(); 3349 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3350 if (userId == UserHandle.USER_NULL) return; 3351 3352 if (Intent.ACTION_USER_STARTING.equals(action)) { 3353 onUserStart(userId); 3354 } else if (Intent.ACTION_USER_STOPPING.equals(action)) { 3355 onUserStop(userId); 3356 } 3357 } 3358 }; 3359 3360 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3361 new HashMap<Messenger, NetworkFactoryInfo>(); 3362 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3363 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3364 3365 private static class NetworkFactoryInfo { 3366 public final String name; 3367 public final Messenger messenger; 3368 public final AsyncChannel asyncChannel; 3369 3370 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3371 this.name = name; 3372 this.messenger = messenger; 3373 this.asyncChannel = asyncChannel; 3374 } 3375 } 3376 3377 /** 3378 * Tracks info about the requester. 3379 * Also used to notice when the calling process dies so we can self-expire 3380 */ 3381 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3382 static final boolean REQUEST = true; 3383 static final boolean LISTEN = false; 3384 3385 final NetworkRequest request; 3386 final PendingIntent mPendingIntent; 3387 boolean mPendingIntentSent; 3388 private final IBinder mBinder; 3389 final int mPid; 3390 final int mUid; 3391 final Messenger messenger; 3392 final boolean isRequest; 3393 3394 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, boolean isRequest) { 3395 request = r; 3396 mPendingIntent = pi; 3397 messenger = null; 3398 mBinder = null; 3399 mPid = getCallingPid(); 3400 mUid = getCallingUid(); 3401 this.isRequest = isRequest; 3402 } 3403 3404 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, boolean isRequest) { 3405 super(); 3406 messenger = m; 3407 request = r; 3408 mBinder = binder; 3409 mPid = getCallingPid(); 3410 mUid = getCallingUid(); 3411 this.isRequest = isRequest; 3412 mPendingIntent = null; 3413 3414 try { 3415 mBinder.linkToDeath(this, 0); 3416 } catch (RemoteException e) { 3417 binderDied(); 3418 } 3419 } 3420 3421 void unlinkDeathRecipient() { 3422 if (mBinder != null) { 3423 mBinder.unlinkToDeath(this, 0); 3424 } 3425 } 3426 3427 public void binderDied() { 3428 log("ConnectivityService NetworkRequestInfo binderDied(" + 3429 request + ", " + mBinder + ")"); 3430 releaseNetworkRequest(request); 3431 } 3432 3433 public String toString() { 3434 return (isRequest ? "Request" : "Listen") + " from uid/pid:" + mUid + "/" + 3435 mPid + " for " + request + 3436 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3437 } 3438 } 3439 3440 @Override 3441 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3442 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3443 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3444 enforceNetworkRequestPermissions(networkCapabilities); 3445 enforceMeteredApnPolicy(networkCapabilities); 3446 3447 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3448 throw new IllegalArgumentException("Bad timeout specified"); 3449 } 3450 3451 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3452 nextNetworkRequestId()); 3453 if (DBG) log("requestNetwork for " + networkRequest); 3454 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3455 NetworkRequestInfo.REQUEST); 3456 3457 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3458 if (timeoutMs > 0) { 3459 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3460 nri), timeoutMs); 3461 } 3462 return networkRequest; 3463 } 3464 3465 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3466 if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED) 3467 == false) { 3468 enforceConnectivityInternalPermission(); 3469 } else { 3470 enforceChangePermission(); 3471 } 3472 } 3473 3474 @Override 3475 public boolean requestBandwidthUpdate(Network network) { 3476 enforceAccessPermission(); 3477 NetworkAgentInfo nai = null; 3478 if (network == null) { 3479 return false; 3480 } 3481 synchronized (mNetworkForNetId) { 3482 nai = mNetworkForNetId.get(network.netId); 3483 } 3484 if (nai != null) { 3485 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3486 return true; 3487 } 3488 return false; 3489 } 3490 3491 3492 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3493 // if UID is restricted, don't allow them to bring up metered APNs 3494 if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED) 3495 == false) { 3496 final int uidRules; 3497 final int uid = Binder.getCallingUid(); 3498 synchronized(mRulesLock) { 3499 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3500 } 3501 if ((uidRules & (RULE_REJECT_METERED | RULE_REJECT_ALL)) != 0) { 3502 // we could silently fail or we can filter the available nets to only give 3503 // them those they have access to. Chose the more useful 3504 networkCapabilities.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED); 3505 } 3506 } 3507 } 3508 3509 @Override 3510 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3511 PendingIntent operation) { 3512 checkNotNull(operation, "PendingIntent cannot be null."); 3513 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3514 enforceNetworkRequestPermissions(networkCapabilities); 3515 enforceMeteredApnPolicy(networkCapabilities); 3516 3517 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 3518 nextNetworkRequestId()); 3519 if (DBG) log("pendingRequest for " + networkRequest + " to trigger " + operation); 3520 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 3521 NetworkRequestInfo.REQUEST); 3522 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 3523 nri)); 3524 return networkRequest; 3525 } 3526 3527 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 3528 mHandler.sendMessageDelayed( 3529 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3530 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 3531 } 3532 3533 @Override 3534 public void releasePendingNetworkRequest(PendingIntent operation) { 3535 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 3536 getCallingUid(), 0, operation)); 3537 } 3538 3539 // In order to implement the compatibility measure for pre-M apps that call 3540 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 3541 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 3542 // This ensures it has permission to do so. 3543 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 3544 if (nc == null) { 3545 return false; 3546 } 3547 int[] transportTypes = nc.getTransportTypes(); 3548 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 3549 return false; 3550 } 3551 try { 3552 mContext.enforceCallingOrSelfPermission( 3553 android.Manifest.permission.ACCESS_WIFI_STATE, 3554 "ConnectivityService"); 3555 } catch (SecurityException e) { 3556 return false; 3557 } 3558 return true; 3559 } 3560 3561 @Override 3562 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 3563 Messenger messenger, IBinder binder) { 3564 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 3565 enforceAccessPermission(); 3566 } 3567 3568 NetworkRequest networkRequest = new NetworkRequest(new NetworkCapabilities( 3569 networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 3570 if (DBG) log("listenForNetwork for " + networkRequest); 3571 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 3572 NetworkRequestInfo.LISTEN); 3573 3574 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 3575 return networkRequest; 3576 } 3577 3578 @Override 3579 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 3580 PendingIntent operation) { 3581 } 3582 3583 @Override 3584 public void releaseNetworkRequest(NetworkRequest networkRequest) { 3585 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 3586 0, networkRequest)); 3587 } 3588 3589 @Override 3590 public void registerNetworkFactory(Messenger messenger, String name) { 3591 enforceConnectivityInternalPermission(); 3592 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 3593 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 3594 } 3595 3596 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 3597 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 3598 mNetworkFactoryInfos.put(nfi.messenger, nfi); 3599 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 3600 } 3601 3602 @Override 3603 public void unregisterNetworkFactory(Messenger messenger) { 3604 enforceConnectivityInternalPermission(); 3605 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 3606 } 3607 3608 private void handleUnregisterNetworkFactory(Messenger messenger) { 3609 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 3610 if (nfi == null) { 3611 loge("Failed to find Messenger in unregisterNetworkFactory"); 3612 return; 3613 } 3614 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 3615 } 3616 3617 /** 3618 * NetworkAgentInfo supporting a request by requestId. 3619 * These have already been vetted (their Capabilities satisfy the request) 3620 * and the are the highest scored network available. 3621 * the are keyed off the Requests requestId. 3622 */ 3623 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 3624 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 3625 new SparseArray<NetworkAgentInfo>(); 3626 3627 // NOTE: Accessed on multiple threads, must be synchronized on itself. 3628 @GuardedBy("mNetworkForNetId") 3629 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 3630 new SparseArray<NetworkAgentInfo>(); 3631 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 3632 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 3633 // there may not be a strict 1:1 correlation between the two. 3634 @GuardedBy("mNetworkForNetId") 3635 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 3636 3637 // NetworkAgentInfo keyed off its connecting messenger 3638 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 3639 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 3640 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 3641 new HashMap<Messenger, NetworkAgentInfo>(); 3642 3643 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 3644 private final NetworkRequest mDefaultRequest; 3645 3646 private NetworkAgentInfo getDefaultNetwork() { 3647 return mNetworkForRequestId.get(mDefaultRequest.requestId); 3648 } 3649 3650 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 3651 return nai == getDefaultNetwork(); 3652 } 3653 3654 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 3655 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 3656 int currentScore, NetworkMisc networkMisc) { 3657 enforceConnectivityInternalPermission(); 3658 3659 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 3660 // satisfies mDefaultRequest. 3661 NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 3662 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 3663 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 3664 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest); 3665 synchronized (this) { 3666 nai.networkMonitor.systemReady = mSystemReady; 3667 } 3668 if (DBG) log("registerNetworkAgent " + nai); 3669 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 3670 return nai.network.netId; 3671 } 3672 3673 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 3674 if (VDBG) log("Got NetworkAgent Messenger"); 3675 mNetworkAgentInfos.put(na.messenger, na); 3676 synchronized (mNetworkForNetId) { 3677 mNetworkForNetId.put(na.network.netId, na); 3678 } 3679 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 3680 NetworkInfo networkInfo = na.networkInfo; 3681 na.networkInfo = null; 3682 updateNetworkInfo(na, networkInfo); 3683 } 3684 3685 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 3686 LinkProperties newLp = networkAgent.linkProperties; 3687 int netId = networkAgent.network.netId; 3688 3689 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 3690 // we do anything else, make sure its LinkProperties are accurate. 3691 if (networkAgent.clatd != null) { 3692 networkAgent.clatd.fixupLinkProperties(oldLp); 3693 } 3694 3695 updateInterfaces(newLp, oldLp, netId); 3696 updateMtu(newLp, oldLp); 3697 // TODO - figure out what to do for clat 3698// for (LinkProperties lp : newLp.getStackedLinks()) { 3699// updateMtu(lp, null); 3700// } 3701 updateTcpBufferSizes(networkAgent); 3702 3703 // TODO: deprecate and remove mDefaultDns when we can do so safely. 3704 // For now, use it only when the network has Internet access. http://b/18327075 3705 final boolean useDefaultDns = networkAgent.networkCapabilities.hasCapability( 3706 NetworkCapabilities.NET_CAPABILITY_INTERNET); 3707 final boolean flushDns = updateRoutes(newLp, oldLp, netId); 3708 updateDnses(newLp, oldLp, netId, flushDns, useDefaultDns); 3709 3710 updateClat(newLp, oldLp, networkAgent); 3711 if (isDefaultNetwork(networkAgent)) { 3712 handleApplyDefaultProxy(newLp.getHttpProxy()); 3713 } else { 3714 updateProxy(newLp, oldLp, networkAgent); 3715 } 3716 // TODO - move this check to cover the whole function 3717 if (!Objects.equals(newLp, oldLp)) { 3718 notifyIfacesChanged(); 3719 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 3720 } 3721 } 3722 3723 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 3724 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 3725 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 3726 3727 if (!wasRunningClat && shouldRunClat) { 3728 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 3729 nai.clatd.start(); 3730 } else if (wasRunningClat && !shouldRunClat) { 3731 nai.clatd.stop(); 3732 } 3733 } 3734 3735 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 3736 CompareResult<String> interfaceDiff = new CompareResult<String>(); 3737 if (oldLp != null) { 3738 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 3739 } else if (newLp != null) { 3740 interfaceDiff.added = newLp.getAllInterfaceNames(); 3741 } 3742 for (String iface : interfaceDiff.added) { 3743 try { 3744 if (DBG) log("Adding iface " + iface + " to network " + netId); 3745 mNetd.addInterfaceToNetwork(iface, netId); 3746 } catch (Exception e) { 3747 loge("Exception adding interface: " + e); 3748 } 3749 } 3750 for (String iface : interfaceDiff.removed) { 3751 try { 3752 if (DBG) log("Removing iface " + iface + " from network " + netId); 3753 mNetd.removeInterfaceFromNetwork(iface, netId); 3754 } catch (Exception e) { 3755 loge("Exception removing interface: " + e); 3756 } 3757 } 3758 } 3759 3760 /** 3761 * Have netd update routes from oldLp to newLp. 3762 * @return true if routes changed between oldLp and newLp 3763 */ 3764 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 3765 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 3766 if (oldLp != null) { 3767 routeDiff = oldLp.compareAllRoutes(newLp); 3768 } else if (newLp != null) { 3769 routeDiff.added = newLp.getAllRoutes(); 3770 } 3771 3772 // add routes before removing old in case it helps with continuous connectivity 3773 3774 // do this twice, adding non-nexthop routes first, then routes they are dependent on 3775 for (RouteInfo route : routeDiff.added) { 3776 if (route.hasGateway()) continue; 3777 if (DBG) log("Adding Route [" + route + "] to network " + netId); 3778 try { 3779 mNetd.addRoute(netId, route); 3780 } catch (Exception e) { 3781 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 3782 loge("Exception in addRoute for non-gateway: " + e); 3783 } 3784 } 3785 } 3786 for (RouteInfo route : routeDiff.added) { 3787 if (route.hasGateway() == false) continue; 3788 if (DBG) log("Adding Route [" + route + "] to network " + netId); 3789 try { 3790 mNetd.addRoute(netId, route); 3791 } catch (Exception e) { 3792 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 3793 loge("Exception in addRoute for gateway: " + e); 3794 } 3795 } 3796 } 3797 3798 for (RouteInfo route : routeDiff.removed) { 3799 if (DBG) log("Removing Route [" + route + "] from network " + netId); 3800 try { 3801 mNetd.removeRoute(netId, route); 3802 } catch (Exception e) { 3803 loge("Exception in removeRoute: " + e); 3804 } 3805 } 3806 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 3807 } 3808 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId, 3809 boolean flush, boolean useDefaultDns) { 3810 if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) { 3811 Collection<InetAddress> dnses = newLp.getDnsServers(); 3812 if (dnses.size() == 0 && mDefaultDns != null && useDefaultDns) { 3813 dnses = new ArrayList(); 3814 dnses.add(mDefaultDns); 3815 if (DBG) { 3816 loge("no dns provided for netId " + netId + ", so using defaults"); 3817 } 3818 } 3819 if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses); 3820 try { 3821 mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses), 3822 newLp.getDomains()); 3823 } catch (Exception e) { 3824 loge("Exception in setDnsServersForNetwork: " + e); 3825 } 3826 NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId); 3827 if (defaultNai != null && defaultNai.network.netId == netId) { 3828 setDefaultDnsSystemProperties(dnses); 3829 } 3830 flushVmDnsCache(); 3831 } else if (flush) { 3832 try { 3833 mNetd.flushNetworkDnsCache(netId); 3834 } catch (Exception e) { 3835 loge("Exception in flushNetworkDnsCache: " + e); 3836 } 3837 flushVmDnsCache(); 3838 } 3839 } 3840 3841 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 3842 int last = 0; 3843 for (InetAddress dns : dnses) { 3844 ++last; 3845 String key = "net.dns" + last; 3846 String value = dns.getHostAddress(); 3847 SystemProperties.set(key, value); 3848 } 3849 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 3850 String key = "net.dns" + i; 3851 SystemProperties.set(key, ""); 3852 } 3853 mNumDnsEntries = last; 3854 } 3855 3856 private void updateCapabilities(NetworkAgentInfo networkAgent, 3857 NetworkCapabilities networkCapabilities) { 3858 if (!Objects.equals(networkAgent.networkCapabilities, networkCapabilities)) { 3859 synchronized (networkAgent) { 3860 networkAgent.networkCapabilities = networkCapabilities; 3861 } 3862 rematchAllNetworksAndRequests(networkAgent, networkAgent.getCurrentScore()); 3863 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_CAP_CHANGED); 3864 } 3865 } 3866 3867 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 3868 for (int i = 0; i < nai.networkRequests.size(); i++) { 3869 NetworkRequest nr = nai.networkRequests.valueAt(i); 3870 // Don't send listening requests to factories. b/17393458 3871 if (!isRequest(nr)) continue; 3872 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 3873 } 3874 } 3875 3876 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 3877 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 3878 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 3879 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 3880 networkRequest); 3881 } 3882 } 3883 3884 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 3885 int notificationType) { 3886 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 3887 Intent intent = new Intent(); 3888 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 3889 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 3890 nri.mPendingIntentSent = true; 3891 sendIntent(nri.mPendingIntent, intent); 3892 } 3893 // else not handled 3894 } 3895 3896 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 3897 mPendingIntentWakeLock.acquire(); 3898 try { 3899 if (DBG) log("Sending " + pendingIntent); 3900 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 3901 } catch (PendingIntent.CanceledException e) { 3902 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 3903 mPendingIntentWakeLock.release(); 3904 releasePendingNetworkRequest(pendingIntent); 3905 } 3906 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 3907 } 3908 3909 @Override 3910 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 3911 String resultData, Bundle resultExtras) { 3912 if (DBG) log("Finished sending " + pendingIntent); 3913 mPendingIntentWakeLock.release(); 3914 // Release with a delay so the receiving client has an opportunity to put in its 3915 // own request. 3916 releasePendingNetworkRequestWithDelay(pendingIntent); 3917 } 3918 3919 private void callCallbackForRequest(NetworkRequestInfo nri, 3920 NetworkAgentInfo networkAgent, int notificationType) { 3921 if (nri.messenger == null) return; // Default request has no msgr 3922 Bundle bundle = new Bundle(); 3923 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 3924 new NetworkRequest(nri.request)); 3925 Message msg = Message.obtain(); 3926 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 3927 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 3928 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 3929 } 3930 switch (notificationType) { 3931 case ConnectivityManager.CALLBACK_LOSING: { 3932 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 3933 break; 3934 } 3935 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 3936 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 3937 new NetworkCapabilities(networkAgent.networkCapabilities)); 3938 break; 3939 } 3940 case ConnectivityManager.CALLBACK_IP_CHANGED: { 3941 bundle.putParcelable(LinkProperties.class.getSimpleName(), 3942 new LinkProperties(networkAgent.linkProperties)); 3943 break; 3944 } 3945 } 3946 msg.what = notificationType; 3947 msg.setData(bundle); 3948 try { 3949 if (VDBG) { 3950 log("sending notification " + notifyTypeToName(notificationType) + 3951 " for " + nri.request); 3952 } 3953 nri.messenger.send(msg); 3954 } catch (RemoteException e) { 3955 // may occur naturally in the race of binder death. 3956 loge("RemoteException caught trying to send a callback msg for " + nri.request); 3957 } 3958 } 3959 3960 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 3961 for (int i = 0; i < nai.networkRequests.size(); i++) { 3962 NetworkRequest nr = nai.networkRequests.valueAt(i); 3963 // Ignore listening requests. 3964 if (!isRequest(nr)) continue; 3965 loge("Dead network still had at least " + nr); 3966 break; 3967 } 3968 nai.asyncChannel.disconnect(); 3969 } 3970 3971 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 3972 if (oldNetwork == null) { 3973 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 3974 return; 3975 } 3976 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 3977 teardownUnneededNetwork(oldNetwork); 3978 } 3979 3980 private void makeDefault(NetworkAgentInfo newNetwork) { 3981 if (DBG) log("Switching to new default network: " + newNetwork); 3982 setupDataActivityTracking(newNetwork); 3983 try { 3984 mNetd.setDefaultNetId(newNetwork.network.netId); 3985 } catch (Exception e) { 3986 loge("Exception setting default network :" + e); 3987 } 3988 notifyLockdownVpn(newNetwork); 3989 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 3990 updateTcpBufferSizes(newNetwork); 3991 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 3992 } 3993 3994 // Handles a network appearing or improving its score. 3995 // 3996 // - Evaluates all current NetworkRequests that can be 3997 // satisfied by newNetwork, and reassigns to newNetwork 3998 // any such requests for which newNetwork is the best. 3999 // 4000 // - Lingers any validated Networks that as a result are no longer 4001 // needed. A network is needed if it is the best network for 4002 // one or more NetworkRequests, or if it is a VPN. 4003 // 4004 // - Tears down newNetwork if it just became validated 4005 // (i.e. nascent==JUST_VALIDATED) but turns out to be unneeded. 4006 // 4007 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4008 // networks that have no chance (i.e. even if validated) 4009 // of becoming the highest scoring network. 4010 // 4011 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4012 // it does not remove NetworkRequests that other Networks could better satisfy. 4013 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4014 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4015 // as it performs better by a factor of the number of Networks. 4016 // 4017 // @param newNetwork is the network to be matched against NetworkRequests. 4018 // @param nascent indicates if newNetwork just became validated, in which case it should be 4019 // torn down if unneeded. 4020 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4021 // performed to tear down unvalidated networks that have no chance (i.e. even if 4022 // validated) of becoming the highest scoring network. 4023 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, NascentState nascent, 4024 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4025 if (!newNetwork.created) return; 4026 if (nascent == NascentState.JUST_VALIDATED && !newNetwork.everValidated) { 4027 loge("ERROR: nascent network not validated."); 4028 } 4029 boolean keep = newNetwork.isVPN(); 4030 boolean isNewDefault = false; 4031 NetworkAgentInfo oldDefaultNetwork = null; 4032 if (DBG) log("rematching " + newNetwork.name()); 4033 // Find and migrate to this Network any NetworkRequests for 4034 // which this network is now the best. 4035 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4036 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4037 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4038 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4039 if (newNetwork == currentNetwork) { 4040 if (DBG) { 4041 log("Network " + newNetwork.name() + " was already satisfying" + 4042 " request " + nri.request.requestId + ". No change."); 4043 } 4044 keep = true; 4045 continue; 4046 } 4047 4048 // check if it satisfies the NetworkCapabilities 4049 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4050 if (newNetwork.satisfies(nri.request)) { 4051 if (!nri.isRequest) { 4052 // This is not a request, it's a callback listener. 4053 // Add it to newNetwork regardless of score. 4054 newNetwork.addRequest(nri.request); 4055 continue; 4056 } 4057 4058 // next check if it's better than any current network we're using for 4059 // this request 4060 if (VDBG) { 4061 log("currentScore = " + 4062 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4063 ", newScore = " + newNetwork.getCurrentScore()); 4064 } 4065 if (currentNetwork == null || 4066 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4067 if (currentNetwork != null) { 4068 if (DBG) log(" accepting network in place of " + currentNetwork.name()); 4069 currentNetwork.networkRequests.remove(nri.request.requestId); 4070 currentNetwork.networkLingered.add(nri.request); 4071 affectedNetworks.add(currentNetwork); 4072 } else { 4073 if (DBG) log(" accepting network in place of null"); 4074 } 4075 unlinger(newNetwork); 4076 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4077 newNetwork.addRequest(nri.request); 4078 keep = true; 4079 // Tell NetworkFactories about the new score, so they can stop 4080 // trying to connect if they know they cannot match it. 4081 // TODO - this could get expensive if we have alot of requests for this 4082 // network. Think about if there is a way to reduce this. Push 4083 // netid->request mapping to each factory? 4084 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4085 if (mDefaultRequest.requestId == nri.request.requestId) { 4086 isNewDefault = true; 4087 oldDefaultNetwork = currentNetwork; 4088 } 4089 } 4090 } 4091 } 4092 // Linger any networks that are no longer needed. 4093 for (NetworkAgentInfo nai : affectedNetworks) { 4094 if (nai.everValidated && unneeded(nai)) { 4095 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 4096 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 4097 } else { 4098 unlinger(nai); 4099 } 4100 } 4101 if (keep) { 4102 if (isNewDefault) { 4103 // Notify system services that this network is up. 4104 makeDefault(newNetwork); 4105 synchronized (ConnectivityService.this) { 4106 // have a new default network, release the transition wakelock in 4107 // a second if it's held. The second pause is to allow apps 4108 // to reconnect over the new network 4109 if (mNetTransitionWakeLock.isHeld()) { 4110 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4111 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4112 mNetTransitionWakeLockSerialNumber, 0), 4113 1000); 4114 } 4115 } 4116 } 4117 4118 // do this after the default net is switched, but 4119 // before LegacyTypeTracker sends legacy broadcasts 4120 notifyNetworkCallbacks(newNetwork, ConnectivityManager.CALLBACK_AVAILABLE); 4121 4122 if (isNewDefault) { 4123 // Maintain the illusion: since the legacy API only 4124 // understands one network at a time, we must pretend 4125 // that the current default network disconnected before 4126 // the new one connected. 4127 if (oldDefaultNetwork != null) { 4128 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4129 oldDefaultNetwork); 4130 } 4131 mDefaultInetConditionPublished = newNetwork.everValidated ? 100 : 0; 4132 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4133 notifyLockdownVpn(newNetwork); 4134 } 4135 4136 // Notify battery stats service about this network, both the normal 4137 // interface and any stacked links. 4138 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4139 try { 4140 final IBatteryStats bs = BatteryStatsService.getService(); 4141 final int type = newNetwork.networkInfo.getType(); 4142 4143 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4144 bs.noteNetworkInterfaceType(baseIface, type); 4145 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4146 final String stackedIface = stacked.getInterfaceName(); 4147 bs.noteNetworkInterfaceType(stackedIface, type); 4148 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4149 } 4150 } catch (RemoteException ignored) { 4151 } 4152 4153 // This has to happen after the notifyNetworkCallbacks as that tickles each 4154 // ConnectivityManager instance so that legacy requests correctly bind dns 4155 // requests to this network. The legacy users are listening for this bcast 4156 // and will generally do a dns request so they can ensureRouteToHost and if 4157 // they do that before the callbacks happen they'll use the default network. 4158 // 4159 // TODO: Is there still a race here? We send the broadcast 4160 // after sending the callback, but if the app can receive the 4161 // broadcast before the callback, it might still break. 4162 // 4163 // This *does* introduce a race where if the user uses the new api 4164 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4165 // they may get old info. Reverse this after the old startUsing api is removed. 4166 // This is on top of the multiple intent sequencing referenced in the todo above. 4167 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4168 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4169 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4170 // legacy type tracker filters out repeat adds 4171 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4172 } 4173 } 4174 4175 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4176 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4177 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4178 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4179 if (newNetwork.isVPN()) { 4180 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4181 } 4182 } else if (nascent == NascentState.JUST_VALIDATED) { 4183 // Only tear down newly validated networks here. Leave unvalidated to either become 4184 // validated (and get evaluated against peers, one losing here), or get reaped (see 4185 // reapUnvalidatedNetworks) if they have no chance of becoming the highest scoring 4186 // network. Networks that have been up for a while and are validated should be torn 4187 // down via the lingering process so communication on that network is given time to 4188 // wrap up. 4189 if (DBG) log("Validated network turns out to be unwanted. Tear it down."); 4190 teardownUnneededNetwork(newNetwork); 4191 } 4192 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4193 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4194 if (!nai.everValidated && unneeded(nai)) { 4195 if (DBG) log("Reaping " + nai.name()); 4196 teardownUnneededNetwork(nai); 4197 } 4198 } 4199 } 4200 } 4201 4202 // Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4203 // being disconnected. 4204 // If only one Network's score or capabilities have been modified since the last time 4205 // this function was called, pass this Network in via the "changed" arugment, otherwise 4206 // pass null. 4207 // If only one Network has been changed but its NetworkCapabilities have not changed, 4208 // pass in the Network's score (from getCurrentScore()) prior to the change via 4209 // "oldScore", otherwise pass changed.getCurrentScore() or 0 if "changed" is null. 4210 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4211 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4212 // to avoid the slowness. It is not simply enough to process just "changed", for 4213 // example in the case where "changed"'s score decreases and another network should begin 4214 // satifying a NetworkRequest that "changed" currently satisfies. 4215 4216 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4217 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4218 // rematchNetworkAndRequests() handles. 4219 if (changed != null && oldScore < changed.getCurrentScore()) { 4220 rematchNetworkAndRequests(changed, NascentState.NOT_JUST_VALIDATED, 4221 ReapUnvalidatedNetworks.REAP); 4222 } else { 4223 for (Iterator i = mNetworkAgentInfos.values().iterator(); i.hasNext(); ) { 4224 rematchNetworkAndRequests((NetworkAgentInfo)i.next(), 4225 NascentState.NOT_JUST_VALIDATED, 4226 // Only reap the last time through the loop. Reaping before all rematching 4227 // is complete could incorrectly teardown a network that hasn't yet been 4228 // rematched. 4229 i.hasNext() ? ReapUnvalidatedNetworks.DONT_REAP 4230 : ReapUnvalidatedNetworks.REAP); 4231 } 4232 } 4233 } 4234 4235 private void updateInetCondition(NetworkAgentInfo nai) { 4236 // Don't bother updating until we've graduated to validated at least once. 4237 if (!nai.everValidated) return; 4238 // For now only update icons for default connection. 4239 // TODO: Update WiFi and cellular icons separately. b/17237507 4240 if (!isDefaultNetwork(nai)) return; 4241 4242 int newInetCondition = nai.lastValidated ? 100 : 0; 4243 // Don't repeat publish. 4244 if (newInetCondition == mDefaultInetConditionPublished) return; 4245 4246 mDefaultInetConditionPublished = newInetCondition; 4247 sendInetConditionBroadcast(nai.networkInfo); 4248 } 4249 4250 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4251 if (mLockdownTracker != null) { 4252 if (nai != null && nai.isVPN()) { 4253 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4254 } else { 4255 mLockdownTracker.onNetworkInfoChanged(); 4256 } 4257 } 4258 } 4259 4260 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4261 NetworkInfo.State state = newInfo.getState(); 4262 NetworkInfo oldInfo = null; 4263 synchronized (networkAgent) { 4264 oldInfo = networkAgent.networkInfo; 4265 networkAgent.networkInfo = newInfo; 4266 } 4267 notifyLockdownVpn(networkAgent); 4268 4269 if (oldInfo != null && oldInfo.getState() == state) { 4270 if (VDBG) log("ignoring duplicate network state non-change"); 4271 return; 4272 } 4273 if (DBG) { 4274 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4275 (oldInfo == null ? "null" : oldInfo.getState()) + 4276 " to " + state); 4277 } 4278 4279 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4280 try { 4281 // This should never fail. Specifying an already in use NetID will cause failure. 4282 if (networkAgent.isVPN()) { 4283 mNetd.createVirtualNetwork(networkAgent.network.netId, 4284 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4285 (networkAgent.networkMisc == null || 4286 !networkAgent.networkMisc.allowBypass)); 4287 } else { 4288 mNetd.createPhysicalNetwork(networkAgent.network.netId); 4289 } 4290 } catch (Exception e) { 4291 loge("Error creating network " + networkAgent.network.netId + ": " 4292 + e.getMessage()); 4293 return; 4294 } 4295 networkAgent.created = true; 4296 updateLinkProperties(networkAgent, null); 4297 notifyIfacesChanged(); 4298 4299 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4300 scheduleUnvalidatedPrompt(networkAgent); 4301 4302 if (networkAgent.isVPN()) { 4303 // Temporarily disable the default proxy (not global). 4304 synchronized (mProxyLock) { 4305 if (!mDefaultProxyDisabled) { 4306 mDefaultProxyDisabled = true; 4307 if (mGlobalProxy == null && mDefaultProxy != null) { 4308 sendProxyBroadcast(null); 4309 } 4310 } 4311 } 4312 // TODO: support proxy per network. 4313 } 4314 4315 // Consider network even though it is not yet validated. 4316 rematchNetworkAndRequests(networkAgent, NascentState.NOT_JUST_VALIDATED, 4317 ReapUnvalidatedNetworks.REAP); 4318 4319 // This has to happen after matching the requests, because callbacks are just requests. 4320 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4321 } else if (state == NetworkInfo.State.DISCONNECTED || 4322 state == NetworkInfo.State.SUSPENDED) { 4323 networkAgent.asyncChannel.disconnect(); 4324 if (networkAgent.isVPN()) { 4325 synchronized (mProxyLock) { 4326 if (mDefaultProxyDisabled) { 4327 mDefaultProxyDisabled = false; 4328 if (mGlobalProxy == null && mDefaultProxy != null) { 4329 sendProxyBroadcast(mDefaultProxy); 4330 } 4331 } 4332 } 4333 } 4334 } 4335 } 4336 4337 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4338 if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4339 if (score < 0) { 4340 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4341 "). Bumping score to min of 0"); 4342 score = 0; 4343 } 4344 4345 final int oldScore = nai.getCurrentScore(); 4346 nai.setCurrentScore(score); 4347 4348 rematchAllNetworksAndRequests(nai, oldScore); 4349 4350 sendUpdatedScoreToFactories(nai); 4351 } 4352 4353 // notify only this one new request of the current state 4354 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4355 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4356 // TODO - read state from monitor to decide what to send. 4357// if (nai.networkMonitor.isLingering()) { 4358// notifyType = NetworkCallbacks.LOSING; 4359// } else if (nai.networkMonitor.isEvaluating()) { 4360// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4361// } 4362 if (nri.mPendingIntent == null) { 4363 callCallbackForRequest(nri, nai, notifyType); 4364 } else { 4365 sendPendingIntentForRequest(nri, nai, notifyType); 4366 } 4367 } 4368 4369 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, boolean connected, int type) { 4370 // The NetworkInfo we actually send out has no bearing on the real 4371 // state of affairs. For example, if the default connection is mobile, 4372 // and a request for HIPRI has just gone away, we need to pretend that 4373 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4374 // the state to DISCONNECTED, even though the network is of type MOBILE 4375 // and is still connected. 4376 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4377 info.setType(type); 4378 if (connected) { 4379 info.setDetailedState(DetailedState.CONNECTED, null, info.getExtraInfo()); 4380 sendConnectedBroadcast(info); 4381 } else { 4382 info.setDetailedState(DetailedState.DISCONNECTED, null, info.getExtraInfo()); 4383 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4384 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4385 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4386 if (info.isFailover()) { 4387 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4388 nai.networkInfo.setFailover(false); 4389 } 4390 if (info.getReason() != null) { 4391 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4392 } 4393 if (info.getExtraInfo() != null) { 4394 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4395 } 4396 NetworkAgentInfo newDefaultAgent = null; 4397 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4398 newDefaultAgent = mNetworkForRequestId.get(mDefaultRequest.requestId); 4399 if (newDefaultAgent != null) { 4400 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4401 newDefaultAgent.networkInfo); 4402 } else { 4403 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4404 } 4405 } 4406 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4407 mDefaultInetConditionPublished); 4408 sendStickyBroadcast(intent); 4409 if (newDefaultAgent != null) { 4410 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4411 } 4412 } 4413 } 4414 4415 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 4416 if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 4417 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 4418 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 4419 NetworkRequestInfo nri = mNetworkRequests.get(nr); 4420 if (VDBG) log(" sending notification for " + nr); 4421 if (nri.mPendingIntent == null) { 4422 callCallbackForRequest(nri, networkAgent, notifyType); 4423 } else { 4424 sendPendingIntentForRequest(nri, networkAgent, notifyType); 4425 } 4426 } 4427 } 4428 4429 private String notifyTypeToName(int notifyType) { 4430 switch (notifyType) { 4431 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 4432 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 4433 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 4434 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 4435 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 4436 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 4437 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 4438 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 4439 } 4440 return "UNKNOWN"; 4441 } 4442 4443 /** 4444 * Notify other system services that set of active ifaces has changed. 4445 */ 4446 private void notifyIfacesChanged() { 4447 try { 4448 mStatsService.forceUpdateIfaces(); 4449 } catch (Exception ignored) { 4450 } 4451 } 4452 4453 @Override 4454 public boolean addVpnAddress(String address, int prefixLength) { 4455 throwIfLockdownEnabled(); 4456 int user = UserHandle.getUserId(Binder.getCallingUid()); 4457 synchronized (mVpns) { 4458 return mVpns.get(user).addAddress(address, prefixLength); 4459 } 4460 } 4461 4462 @Override 4463 public boolean removeVpnAddress(String address, int prefixLength) { 4464 throwIfLockdownEnabled(); 4465 int user = UserHandle.getUserId(Binder.getCallingUid()); 4466 synchronized (mVpns) { 4467 return mVpns.get(user).removeAddress(address, prefixLength); 4468 } 4469 } 4470 4471 @Override 4472 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 4473 throwIfLockdownEnabled(); 4474 int user = UserHandle.getUserId(Binder.getCallingUid()); 4475 boolean success; 4476 synchronized (mVpns) { 4477 success = mVpns.get(user).setUnderlyingNetworks(networks); 4478 } 4479 if (success) { 4480 notifyIfacesChanged(); 4481 } 4482 return success; 4483 } 4484 4485 @Override 4486 public void factoryReset() { 4487 enforceConnectivityInternalPermission(); 4488 // Turn airplane mode off 4489 setAirplaneMode(false); 4490 4491 // Untether 4492 for (String tether : getTetheredIfaces()) { 4493 untether(tether); 4494 } 4495 4496 // Turn VPN off 4497 VpnConfig vpnConfig = getVpnConfig(); 4498 if (vpnConfig != null) { 4499 if (vpnConfig.legacy) { 4500 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN); 4501 } else { 4502 // Prevent this app from initiating VPN connections in the future without 4503 // user intervention. 4504 setVpnPackageAuthorization(false); 4505 4506 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN); 4507 } 4508 } 4509 } 4510} 4511