WifiServiceImpl.java revision 1227b49a94f33844ad0606b48b591bea4d27b08e
1/* 2 * Copyright (C) 2010 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.wifi; 18 19import android.Manifest; 20import android.app.ActivityManager; 21import android.app.AppOpsManager; 22import android.bluetooth.BluetoothAdapter; 23import android.content.BroadcastReceiver; 24import android.content.Context; 25import android.content.Intent; 26import android.content.IntentFilter; 27import android.content.pm.PackageManager; 28import android.content.pm.UserInfo; 29import android.database.ContentObserver; 30import android.net.ConnectivityManager; 31import android.net.DhcpInfo; 32import android.net.DhcpResults; 33import android.net.IpConfiguration.ProxySettings; 34import android.net.LinkAddress; 35import android.net.Network; 36import android.net.NetworkUtils; 37import android.net.RouteInfo; 38import android.net.Uri; 39import android.net.wifi.*; 40import android.net.wifi.IWifiManager; 41import android.os.AsyncTask; 42import android.os.Binder; 43import android.os.Handler; 44import android.os.HandlerThread; 45import android.os.IBinder; 46import android.os.Message; 47import android.os.Messenger; 48import android.os.PowerManager; 49import android.os.RemoteException; 50import android.os.SystemClock; 51import android.os.SystemProperties; 52import android.os.UserHandle; 53import android.os.UserManager; 54import android.os.WorkSource; 55import android.provider.Settings; 56import android.text.TextUtils; 57import android.util.Log; 58import android.util.Slog; 59 60import java.io.FileNotFoundException; 61import java.io.BufferedReader; 62import java.io.FileDescriptor; 63import java.io.FileReader; 64import java.io.IOException; 65import java.io.PrintWriter; 66import java.lang.Override; 67import java.net.InetAddress; 68import java.net.Inet4Address; 69import java.net.URISyntaxException; 70import java.security.GeneralSecurityException; 71import java.util.ArrayList; 72import java.util.List; 73 74import com.android.internal.R; 75import com.android.internal.app.IBatteryStats; 76import com.android.internal.telephony.TelephonyIntents; 77import com.android.internal.util.AsyncChannel; 78import com.android.server.am.BatteryStatsService; 79import com.android.server.wifi.configparse.ConfigBuilder; 80 81import org.xml.sax.SAXException; 82 83import static com.android.server.wifi.WifiController.CMD_AIRPLANE_TOGGLED; 84import static com.android.server.wifi.WifiController.CMD_BATTERY_CHANGED; 85import static com.android.server.wifi.WifiController.CMD_EMERGENCY_MODE_CHANGED; 86import static com.android.server.wifi.WifiController.CMD_LOCKS_CHANGED; 87import static com.android.server.wifi.WifiController.CMD_SCAN_ALWAYS_MODE_CHANGED; 88import static com.android.server.wifi.WifiController.CMD_SCREEN_OFF; 89import static com.android.server.wifi.WifiController.CMD_SCREEN_ON; 90import static com.android.server.wifi.WifiController.CMD_SET_AP; 91import static com.android.server.wifi.WifiController.CMD_USER_PRESENT; 92import static com.android.server.wifi.WifiController.CMD_WIFI_TOGGLED; 93/** 94 * WifiService handles remote WiFi operation requests by implementing 95 * the IWifiManager interface. 96 * 97 * @hide 98 */ 99public final class WifiServiceImpl extends IWifiManager.Stub { 100 private static final String TAG = "WifiService"; 101 private static final boolean DBG = true; 102 103 final WifiStateMachine mWifiStateMachine; 104 105 private final Context mContext; 106 107 final LockList mLocks = new LockList(); 108 // some wifi lock statistics 109 private int mFullHighPerfLocksAcquired; 110 private int mFullHighPerfLocksReleased; 111 private int mFullLocksAcquired; 112 private int mFullLocksReleased; 113 private int mScanLocksAcquired; 114 private int mScanLocksReleased; 115 116 private final List<Multicaster> mMulticasters = 117 new ArrayList<Multicaster>(); 118 private int mMulticastEnabled; 119 private int mMulticastDisabled; 120 121 private final IBatteryStats mBatteryStats; 122 private final PowerManager mPowerManager; 123 private final AppOpsManager mAppOps; 124 125 private String mInterfaceName; 126 127 // Debug counter tracking scan requests sent by WifiManager 128 private int scanRequestCounter = 0; 129 130 /* Tracks the open wi-fi network notification */ 131 private WifiNotificationController mNotificationController; 132 /* Polls traffic stats and notifies clients */ 133 private WifiTrafficPoller mTrafficPoller; 134 /* Tracks the persisted states for wi-fi & airplane mode */ 135 final WifiSettingsStore mSettingsStore; 136 137 /** 138 * Asynchronous channel to WifiStateMachine 139 */ 140 private AsyncChannel mWifiStateMachineChannel; 141 142 /** 143 * Handles client connections 144 */ 145 private class ClientHandler extends Handler { 146 147 ClientHandler(android.os.Looper looper) { 148 super(looper); 149 } 150 151 @Override 152 public void handleMessage(Message msg) { 153 switch (msg.what) { 154 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 155 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 156 if (DBG) Slog.d(TAG, "New client listening to asynchronous messages"); 157 // We track the clients by the Messenger 158 // since it is expected to be always available 159 mTrafficPoller.addClient(msg.replyTo); 160 } else { 161 Slog.e(TAG, "Client connection failure, error=" + msg.arg1); 162 } 163 break; 164 } 165 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 166 if (msg.arg1 == AsyncChannel.STATUS_SEND_UNSUCCESSFUL) { 167 if (DBG) Slog.d(TAG, "Send failed, client connection lost"); 168 } else { 169 if (DBG) Slog.d(TAG, "Client connection lost with reason: " + msg.arg1); 170 } 171 mTrafficPoller.removeClient(msg.replyTo); 172 break; 173 } 174 case AsyncChannel.CMD_CHANNEL_FULL_CONNECTION: { 175 AsyncChannel ac = new AsyncChannel(); 176 ac.connect(mContext, this, msg.replyTo); 177 break; 178 } 179 /* Client commands are forwarded to state machine */ 180 case WifiManager.CONNECT_NETWORK: 181 case WifiManager.SAVE_NETWORK: { 182 WifiConfiguration config = (WifiConfiguration) msg.obj; 183 int networkId = msg.arg1; 184 if (msg.what == WifiManager.SAVE_NETWORK) { 185 Slog.e("WiFiServiceImpl ", "SAVE" 186 + " nid=" + Integer.toString(networkId) 187 + " uid=" + msg.sendingUid 188 + " name=" 189 + mContext.getPackageManager().getNameForUid(msg.sendingUid)); 190 } 191 if (msg.what == WifiManager.CONNECT_NETWORK) { 192 Slog.e("WiFiServiceImpl ", "CONNECT " 193 + " nid=" + Integer.toString(networkId) 194 + " uid=" + msg.sendingUid 195 + " name=" 196 + mContext.getPackageManager().getNameForUid(msg.sendingUid)); 197 } 198 199 if (config != null && config.isValid()) { 200 if (DBG) Slog.d(TAG, "Connect with config" + config); 201 mWifiStateMachine.sendMessage(Message.obtain(msg)); 202 } else if (config == null 203 && networkId != WifiConfiguration.INVALID_NETWORK_ID) { 204 if (DBG) Slog.d(TAG, "Connect with networkId" + networkId); 205 mWifiStateMachine.sendMessage(Message.obtain(msg)); 206 } else { 207 Slog.e(TAG, "ClientHandler.handleMessage ignoring invalid msg=" + msg); 208 if (msg.what == WifiManager.CONNECT_NETWORK) { 209 replyFailed(msg, WifiManager.CONNECT_NETWORK_FAILED, 210 WifiManager.INVALID_ARGS); 211 } else { 212 replyFailed(msg, WifiManager.SAVE_NETWORK_FAILED, 213 WifiManager.INVALID_ARGS); 214 } 215 } 216 break; 217 } 218 case WifiManager.FORGET_NETWORK: 219 if (isOwner(msg.sendingUid)) { 220 mWifiStateMachine.sendMessage(Message.obtain(msg)); 221 } else { 222 Slog.e(TAG, "Forget is not authorized for user"); 223 replyFailed(msg, WifiManager.FORGET_NETWORK_FAILED, 224 WifiManager.NOT_AUTHORIZED); 225 } 226 break; 227 case WifiManager.START_WPS: 228 case WifiManager.CANCEL_WPS: 229 case WifiManager.DISABLE_NETWORK: 230 case WifiManager.RSSI_PKTCNT_FETCH: { 231 mWifiStateMachine.sendMessage(Message.obtain(msg)); 232 break; 233 } 234 default: { 235 Slog.d(TAG, "ClientHandler.handleMessage ignoring msg=" + msg); 236 break; 237 } 238 } 239 } 240 241 private void replyFailed(Message msg, int what, int why) { 242 Message reply = msg.obtain(); 243 reply.what = what; 244 reply.arg1 = why; 245 try { 246 msg.replyTo.send(reply); 247 } catch (RemoteException e) { 248 // There's not much we can do if reply can't be sent! 249 } 250 } 251 } 252 private ClientHandler mClientHandler; 253 254 /** 255 * Handles interaction with WifiStateMachine 256 */ 257 private class WifiStateMachineHandler extends Handler { 258 private AsyncChannel mWsmChannel; 259 260 WifiStateMachineHandler(android.os.Looper looper) { 261 super(looper); 262 mWsmChannel = new AsyncChannel(); 263 mWsmChannel.connect(mContext, this, mWifiStateMachine.getHandler()); 264 } 265 266 @Override 267 public void handleMessage(Message msg) { 268 switch (msg.what) { 269 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 270 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 271 mWifiStateMachineChannel = mWsmChannel; 272 } else { 273 Slog.e(TAG, "WifiStateMachine connection failure, error=" + msg.arg1); 274 mWifiStateMachineChannel = null; 275 } 276 break; 277 } 278 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 279 Slog.e(TAG, "WifiStateMachine channel lost, msg.arg1 =" + msg.arg1); 280 mWifiStateMachineChannel = null; 281 //Re-establish connection to state machine 282 mWsmChannel.connect(mContext, this, mWifiStateMachine.getHandler()); 283 break; 284 } 285 default: { 286 Slog.d(TAG, "WifiStateMachineHandler.handleMessage ignoring msg=" + msg); 287 break; 288 } 289 } 290 } 291 } 292 293 WifiStateMachineHandler mWifiStateMachineHandler; 294 295 private WifiWatchdogStateMachine mWifiWatchdogStateMachine; 296 297 private WifiController mWifiController; 298 299 public WifiServiceImpl(Context context) { 300 mContext = context; 301 302 mInterfaceName = SystemProperties.get("wifi.interface", "wlan0"); 303 304 mTrafficPoller = new WifiTrafficPoller(mContext, mInterfaceName); 305 mWifiStateMachine = new WifiStateMachine(mContext, mInterfaceName, mTrafficPoller); 306 mWifiStateMachine.enableRssiPolling(true); 307 mBatteryStats = BatteryStatsService.getService(); 308 mPowerManager = context.getSystemService(PowerManager.class); 309 mAppOps = (AppOpsManager)context.getSystemService(Context.APP_OPS_SERVICE); 310 311 mNotificationController = new WifiNotificationController(mContext, mWifiStateMachine); 312 mSettingsStore = new WifiSettingsStore(mContext); 313 314 HandlerThread wifiThread = new HandlerThread("WifiService"); 315 wifiThread.start(); 316 mClientHandler = new ClientHandler(wifiThread.getLooper()); 317 mWifiStateMachineHandler = new WifiStateMachineHandler(wifiThread.getLooper()); 318 mWifiController = new WifiController(mContext, this, wifiThread.getLooper()); 319 } 320 321 322 /** 323 * Check if Wi-Fi needs to be enabled and start 324 * if needed 325 * 326 * This function is used only at boot time 327 */ 328 public void checkAndStartWifi() { 329 /* Check if wi-fi needs to be enabled */ 330 boolean wifiEnabled = mSettingsStore.isWifiToggleEnabled(); 331 Slog.i(TAG, "WifiService starting up with Wi-Fi " + 332 (wifiEnabled ? "enabled" : "disabled")); 333 334 registerForScanModeChange(); 335 mContext.registerReceiver( 336 new BroadcastReceiver() { 337 @Override 338 public void onReceive(Context context, Intent intent) { 339 if (mSettingsStore.handleAirplaneModeToggled()) { 340 mWifiController.sendMessage(CMD_AIRPLANE_TOGGLED); 341 } 342 } 343 }, 344 new IntentFilter(Intent.ACTION_AIRPLANE_MODE_CHANGED)); 345 346 // Adding optimizations of only receiving broadcasts when wifi is enabled 347 // can result in race conditions when apps toggle wifi in the background 348 // without active user involvement. Always receive broadcasts. 349 registerForBroadcasts(); 350 registerForPackageOrUserRemoval(); 351 mInIdleMode = mPowerManager.isDeviceIdleMode(); 352 353 mWifiController.start(); 354 355 // If we are already disabled (could be due to airplane mode), avoid changing persist 356 // state here 357 if (wifiEnabled) setWifiEnabled(wifiEnabled); 358 359 mWifiWatchdogStateMachine = WifiWatchdogStateMachine. 360 makeWifiWatchdogStateMachine(mContext, mWifiStateMachine.getMessenger()); 361 } 362 363 /** 364 * see {@link android.net.wifi.WifiManager#pingSupplicant()} 365 * @return {@code true} if the operation succeeds, {@code false} otherwise 366 */ 367 public boolean pingSupplicant() { 368 enforceAccessPermission(); 369 if (mWifiStateMachineChannel != null) { 370 return mWifiStateMachine.syncPingSupplicant(mWifiStateMachineChannel); 371 } else { 372 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 373 return false; 374 } 375 } 376 377 /** 378 * see {@link android.net.wifi.WifiManager#getChannelList} 379 */ 380 public List<WifiChannel> getChannelList() { 381 enforceAccessPermission(); 382 if (mWifiStateMachineChannel != null) { 383 return mWifiStateMachine.syncGetChannelList(mWifiStateMachineChannel); 384 } else { 385 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 386 return null; 387 } 388 } 389 390 // Start a location scan. 391 // L release: A location scan is implemented as a normal scan and avoids scanning DFS channels 392 // Deprecated: Will soon remove implementation 393 public void startLocationRestrictedScan(WorkSource workSource) { 394 enforceChangePermission(); 395 enforceLocationHardwarePermission(); 396 List<WifiChannel> channels = getChannelList(); 397 if (channels == null) { 398 Slog.e(TAG, "startLocationRestrictedScan cant get channels"); 399 return; 400 } 401 ScanSettings settings = new ScanSettings(); 402 for (WifiChannel channel : channels) { 403 if (!channel.isDFS) { 404 settings.channelSet.add(channel); 405 } 406 } 407 if (workSource == null) { 408 // Make sure we always have a workSource indicating the origin of the scan 409 // hence if there is none, pick an internal WifiStateMachine one 410 workSource = new WorkSource(WifiStateMachine.DFS_RESTRICTED_SCAN_REQUEST); 411 } 412 startScan(settings, workSource); 413 } 414 415 /** 416 * see {@link android.net.wifi.WifiManager#startScan} 417 * and {@link android.net.wifi.WifiManager#startCustomizedScan} 418 * 419 * @param settings If null, use default parameter, i.e. full scan. 420 * @param workSource If null, all blame is given to the calling uid. 421 */ 422 public void startScan(ScanSettings settings, WorkSource workSource) { 423 enforceChangePermission(); 424 synchronized (this) { 425 if (mInIdleMode) { 426 mScanPending = true; 427 return; 428 } 429 } 430 if (settings != null) { 431 settings = new ScanSettings(settings); 432 if (!settings.isValid()) { 433 Slog.e(TAG, "invalid scan setting"); 434 return; 435 } 436 } 437 if (workSource != null) { 438 enforceWorkSourcePermission(); 439 // WifiManager currently doesn't use names, so need to clear names out of the 440 // supplied WorkSource to allow future WorkSource combining. 441 workSource.clearNames(); 442 } 443 mWifiStateMachine.startScan(Binder.getCallingUid(), scanRequestCounter++, 444 settings, workSource); 445 } 446 447 public boolean isBatchedScanSupported() { 448 return false; 449 } 450 451 public void pollBatchedScan() { } 452 453 public String getWpsNfcConfigurationToken(int netId) { 454 enforceConnectivityInternalPermission(); 455 return mWifiStateMachine.syncGetWpsNfcConfigurationToken(netId); 456 } 457 458 /** 459 * see {@link android.net.wifi.WifiManager#requestBatchedScan()} 460 */ 461 public boolean requestBatchedScan(BatchedScanSettings requested, IBinder binder, 462 WorkSource workSource) { 463 return false; 464 } 465 466 public List<BatchedScanResult> getBatchedScanResults(String callingPackage) { 467 return null; 468 } 469 470 public void stopBatchedScan(BatchedScanSettings settings) { } 471 472 boolean mInIdleMode; 473 boolean mScanPending; 474 475 void handleIdleModeChanged() { 476 boolean doScan = false; 477 synchronized (this) { 478 boolean idle = mPowerManager.isDeviceIdleMode(); 479 if (mInIdleMode != idle) { 480 mInIdleMode = idle; 481 if (!idle) { 482 if (mScanPending) { 483 mScanPending = false; 484 doScan = true; 485 } 486 } 487 } 488 } 489 if (doScan) { 490 // Someone requested a scan while we were idle; do a full scan now. 491 startScan(null, null); 492 } 493 } 494 495 private void enforceAccessPermission() { 496 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.ACCESS_WIFI_STATE, 497 "WifiService"); 498 } 499 500 private void enforceChangePermission() { 501 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.CHANGE_WIFI_STATE, 502 "WifiService"); 503 } 504 505 private void enforceLocationHardwarePermission() { 506 mContext.enforceCallingOrSelfPermission(Manifest.permission.LOCATION_HARDWARE, 507 "LocationHardware"); 508 } 509 510 private void enforceReadCredentialPermission() { 511 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.READ_WIFI_CREDENTIAL, 512 "WifiService"); 513 } 514 515 private void enforceWorkSourcePermission() { 516 mContext.enforceCallingPermission(android.Manifest.permission.UPDATE_DEVICE_STATS, 517 "WifiService"); 518 519 } 520 521 private void enforceMulticastChangePermission() { 522 mContext.enforceCallingOrSelfPermission( 523 android.Manifest.permission.CHANGE_WIFI_MULTICAST_STATE, 524 "WifiService"); 525 } 526 527 private void enforceConnectivityInternalPermission() { 528 mContext.enforceCallingOrSelfPermission( 529 android.Manifest.permission.CONNECTIVITY_INTERNAL, 530 "ConnectivityService"); 531 } 532 533 /** 534 * see {@link android.net.wifi.WifiManager#setWifiEnabled(boolean)} 535 * @param enable {@code true} to enable, {@code false} to disable. 536 * @return {@code true} if the enable/disable operation was 537 * started or is already in the queue. 538 */ 539 public synchronized boolean setWifiEnabled(boolean enable) { 540 enforceChangePermission(); 541 Slog.d(TAG, "setWifiEnabled: " + enable + " pid=" + Binder.getCallingPid() 542 + ", uid=" + Binder.getCallingUid()); 543 if (DBG) { 544 Slog.e(TAG, "Invoking mWifiStateMachine.setWifiEnabled\n"); 545 } 546 547 /* 548 * Caller might not have WRITE_SECURE_SETTINGS, 549 * only CHANGE_WIFI_STATE is enforced 550 */ 551 552 long ident = Binder.clearCallingIdentity(); 553 try { 554 if (! mSettingsStore.handleWifiToggled(enable)) { 555 // Nothing to do if wifi cannot be toggled 556 return true; 557 } 558 } finally { 559 Binder.restoreCallingIdentity(ident); 560 } 561 562 mWifiController.sendMessage(CMD_WIFI_TOGGLED); 563 return true; 564 } 565 566 /** 567 * see {@link WifiManager#getWifiState()} 568 * @return One of {@link WifiManager#WIFI_STATE_DISABLED}, 569 * {@link WifiManager#WIFI_STATE_DISABLING}, 570 * {@link WifiManager#WIFI_STATE_ENABLED}, 571 * {@link WifiManager#WIFI_STATE_ENABLING}, 572 * {@link WifiManager#WIFI_STATE_UNKNOWN} 573 */ 574 public int getWifiEnabledState() { 575 enforceAccessPermission(); 576 return mWifiStateMachine.syncGetWifiState(); 577 } 578 579 /** 580 * see {@link android.net.wifi.WifiManager#setWifiApEnabled(WifiConfiguration, boolean)} 581 * @param wifiConfig SSID, security and channel details as 582 * part of WifiConfiguration 583 * @param enabled true to enable and false to disable 584 */ 585 public void setWifiApEnabled(WifiConfiguration wifiConfig, boolean enabled) { 586 enforceChangePermission(); 587 ConnectivityManager.enforceTetherChangePermission(mContext); 588 UserManager um = UserManager.get(mContext); 589 if (um.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 590 throw new SecurityException("DISALLOW_CONFIG_TETHERING is enabled for this user."); 591 } 592 // null wifiConfig is a meaningful input for CMD_SET_AP 593 if (wifiConfig == null || wifiConfig.isValid()) { 594 mWifiController.obtainMessage(CMD_SET_AP, enabled ? 1 : 0, 0, wifiConfig).sendToTarget(); 595 } else { 596 Slog.e(TAG, "Invalid WifiConfiguration"); 597 } 598 } 599 600 /** 601 * see {@link WifiManager#getWifiApState()} 602 * @return One of {@link WifiManager#WIFI_AP_STATE_DISABLED}, 603 * {@link WifiManager#WIFI_AP_STATE_DISABLING}, 604 * {@link WifiManager#WIFI_AP_STATE_ENABLED}, 605 * {@link WifiManager#WIFI_AP_STATE_ENABLING}, 606 * {@link WifiManager#WIFI_AP_STATE_FAILED} 607 */ 608 public int getWifiApEnabledState() { 609 enforceAccessPermission(); 610 return mWifiStateMachine.syncGetWifiApState(); 611 } 612 613 /** 614 * see {@link WifiManager#getWifiApConfiguration()} 615 * @return soft access point configuration 616 */ 617 public WifiConfiguration getWifiApConfiguration() { 618 enforceAccessPermission(); 619 return mWifiStateMachine.syncGetWifiApConfiguration(); 620 } 621 622 /** 623 * see {@link WifiManager#buildWifiConfig()} 624 * @return a WifiConfiguration. 625 */ 626 public WifiConfiguration buildWifiConfig(String uriString, String mimeType, byte[] data) { 627 if (mimeType.equals(ConfigBuilder.WifiConfigType)) { 628 try { 629 return ConfigBuilder.buildConfig(uriString, data, mContext); 630 } 631 catch (IOException | GeneralSecurityException | SAXException e) { 632 Log.e(TAG, "Failed to parse wi-fi configuration: " + e); 633 } 634 } 635 else { 636 Log.i(TAG, "Unknown wi-fi config type: " + mimeType); 637 } 638 return null; 639 } 640 641 /** 642 * see {@link WifiManager#setWifiApConfiguration(WifiConfiguration)} 643 * @param wifiConfig WifiConfiguration details for soft access point 644 */ 645 public void setWifiApConfiguration(WifiConfiguration wifiConfig) { 646 enforceChangePermission(); 647 if (wifiConfig == null) 648 return; 649 if (wifiConfig.isValid()) { 650 mWifiStateMachine.setWifiApConfiguration(wifiConfig); 651 } else { 652 Slog.e(TAG, "Invalid WifiConfiguration"); 653 } 654 } 655 656 /** 657 * @param enable {@code true} to enable, {@code false} to disable. 658 * @return {@code true} if the enable/disable operation was 659 * started or is already in the queue. 660 */ 661 public boolean isScanAlwaysAvailable() { 662 enforceAccessPermission(); 663 return mSettingsStore.isScanAlwaysAvailable(); 664 } 665 666 /** 667 * see {@link android.net.wifi.WifiManager#disconnect()} 668 */ 669 public void disconnect() { 670 enforceChangePermission(); 671 mWifiStateMachine.disconnectCommand(); 672 } 673 674 /** 675 * see {@link android.net.wifi.WifiManager#reconnect()} 676 */ 677 public void reconnect() { 678 enforceChangePermission(); 679 mWifiStateMachine.reconnectCommand(); 680 } 681 682 /** 683 * see {@link android.net.wifi.WifiManager#reassociate()} 684 */ 685 public void reassociate() { 686 enforceChangePermission(); 687 mWifiStateMachine.reassociateCommand(); 688 } 689 690 /** 691 * see {@link android.net.wifi.WifiManager#getSupportedFeatures} 692 */ 693 public int getSupportedFeatures() { 694 enforceAccessPermission(); 695 if (mWifiStateMachineChannel != null) { 696 return mWifiStateMachine.syncGetSupportedFeatures(mWifiStateMachineChannel); 697 } else { 698 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 699 return 0; 700 } 701 } 702 703 /** 704 * see {@link android.net.wifi.WifiAdapter#reportActivityInfo} 705 */ 706 public WifiActivityEnergyInfo reportActivityInfo() { 707 enforceAccessPermission(); 708 WifiLinkLayerStats stats; 709 WifiActivityEnergyInfo energyInfo = null; 710 if (mWifiStateMachineChannel != null) { 711 stats = mWifiStateMachine.syncGetLinkLayerStats(mWifiStateMachineChannel); 712 if (stats != null) { 713 714 int rxIdleCurrent = 715 mContext.getResources().getInteger( 716 com.android.internal.R.integer.config_wifi_idle_receive_cur_ma); 717 int rxCurrent = 718 mContext.getResources().getInteger( 719 com.android.internal.R.integer.config_wifi_active_rx_cur_ma); 720 int txCurrent = 721 mContext.getResources().getInteger( 722 com.android.internal.R.integer.config_wifi_tx_cur_ma); 723 int voltage = 724 mContext.getResources().getInteger( 725 com.android.internal.R.integer.config_wifi_operating_voltage_mv); 726 int rxIdleTime = stats.on_time - stats.tx_time - stats.rx_time; 727 728 int energyUsed = (stats.tx_time * txCurrent + stats.rx_time * rxCurrent 729 + rxIdleTime * rxIdleCurrent ) * voltage / 1000; 730 731 // Convert the LinkLayerStats into EnergyActivity 732 energyInfo = new WifiActivityEnergyInfo(SystemClock.elapsedRealtime(), 733 WifiActivityEnergyInfo.STACK_STATE_STATE_IDLE, stats.tx_time, 734 stats.rx_time, rxIdleTime, energyUsed); 735 } 736 return energyInfo; 737 } else { 738 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 739 return null; 740 } 741 } 742 743 /** 744 * see {@link android.net.wifi.WifiManager#getConfiguredNetworks()} 745 * @return the list of configured networks 746 */ 747 public List<WifiConfiguration> getConfiguredNetworks() { 748 enforceAccessPermission(); 749 if (mWifiStateMachineChannel != null) { 750 return mWifiStateMachine.syncGetConfiguredNetworks(Binder.getCallingUid(), 751 mWifiStateMachineChannel); 752 } else { 753 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 754 return null; 755 } 756 } 757 758 /** 759 * see {@link android.net.wifi.WifiManager#getPrivilegedConfiguredNetworks()} 760 * @return the list of configured networks with real preSharedKey 761 */ 762 public List<WifiConfiguration> getPrivilegedConfiguredNetworks() { 763 enforceReadCredentialPermission(); 764 enforceAccessPermission(); 765 if (mWifiStateMachineChannel != null) { 766 return mWifiStateMachine.syncGetPrivilegedConfiguredNetwork(mWifiStateMachineChannel); 767 } else { 768 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 769 return null; 770 } 771 } 772 773 /** 774 * Returns a WifiConfiguration matching this ScanResult 775 * @param scanResult scanResult that represents the BSSID 776 * @return {@link WifiConfiguration} that matches this BSSID or null 777 */ 778 public WifiConfiguration getMatchingWifiConfig(ScanResult scanResult) { 779 enforceAccessPermission(); 780 return mWifiStateMachine.syncGetMatchingWifiConfig(scanResult, mWifiStateMachineChannel); 781 } 782 783 784 /** 785 * see {@link android.net.wifi.WifiManager#addOrUpdateNetwork(WifiConfiguration)} 786 * @return the supplicant-assigned identifier for the new or updated 787 * network if the operation succeeds, or {@code -1} if it fails 788 */ 789 public int addOrUpdateNetwork(WifiConfiguration config) { 790 enforceChangePermission(); 791 if (config.isValid()) { 792 Slog.e("addOrUpdateNetwork", " uid = " + Integer.toString(Binder.getCallingUid()) 793 + " SSID " + config.SSID 794 + " nid=" + Integer.toString(config.networkId)); 795 if (config.networkId == WifiConfiguration.INVALID_NETWORK_ID) { 796 config.creatorUid = Binder.getCallingUid(); 797 } else { 798 config.lastUpdateUid = Binder.getCallingUid(); 799 } 800 if (mWifiStateMachineChannel != null) { 801 return mWifiStateMachine.syncAddOrUpdateNetwork(mWifiStateMachineChannel, config); 802 } else { 803 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 804 return -1; 805 } 806 } else { 807 Slog.e(TAG, "bad network configuration"); 808 return -1; 809 } 810 } 811 812 /** 813 * See {@link android.net.wifi.WifiManager#removeNetwork(int)} 814 * @param netId the integer that identifies the network configuration 815 * to the supplicant 816 * @return {@code true} if the operation succeeded 817 */ 818 public boolean removeNetwork(int netId) { 819 enforceChangePermission(); 820 821 if (!isOwner(Binder.getCallingUid())) { 822 Slog.e(TAG, "Remove is not authorized for user"); 823 return false; 824 } 825 826 if (mWifiStateMachineChannel != null) { 827 return mWifiStateMachine.syncRemoveNetwork(mWifiStateMachineChannel, netId); 828 } else { 829 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 830 return false; 831 } 832 } 833 834 /** 835 * See {@link android.net.wifi.WifiManager#enableNetwork(int, boolean)} 836 * @param netId the integer that identifies the network configuration 837 * to the supplicant 838 * @param disableOthers if true, disable all other networks. 839 * @return {@code true} if the operation succeeded 840 */ 841 public boolean enableNetwork(int netId, boolean disableOthers) { 842 enforceChangePermission(); 843 if (mWifiStateMachineChannel != null) { 844 return mWifiStateMachine.syncEnableNetwork(mWifiStateMachineChannel, netId, 845 disableOthers); 846 } else { 847 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 848 return false; 849 } 850 } 851 852 /** 853 * See {@link android.net.wifi.WifiManager#disableNetwork(int)} 854 * @param netId the integer that identifies the network configuration 855 * to the supplicant 856 * @return {@code true} if the operation succeeded 857 */ 858 public boolean disableNetwork(int netId) { 859 enforceChangePermission(); 860 if (mWifiStateMachineChannel != null) { 861 return mWifiStateMachine.syncDisableNetwork(mWifiStateMachineChannel, netId); 862 } else { 863 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 864 return false; 865 } 866 } 867 868 /** 869 * See {@link android.net.wifi.WifiManager#getConnectionInfo()} 870 * @return the Wi-Fi information, contained in {@link WifiInfo}. 871 */ 872 public WifiInfo getConnectionInfo() { 873 enforceAccessPermission(); 874 /* 875 * Make sure we have the latest information, by sending 876 * a status request to the supplicant. 877 */ 878 return mWifiStateMachine.syncRequestConnectionInfo(); 879 } 880 881 /** 882 * Return the results of the most recent access point scan, in the form of 883 * a list of {@link ScanResult} objects. 884 * @return the list of results 885 */ 886 public List<ScanResult> getScanResults(String callingPackage) { 887 enforceAccessPermission(); 888 int userId = UserHandle.getCallingUserId(); 889 int uid = Binder.getCallingUid(); 890 boolean hasInteractUsersFull = checkInteractAcrossUsersFull(); 891 long ident = Binder.clearCallingIdentity(); 892 try { 893 if (mAppOps.noteOp(AppOpsManager.OP_WIFI_SCAN, uid, callingPackage) 894 != AppOpsManager.MODE_ALLOWED) { 895 return new ArrayList<ScanResult>(); 896 } 897 if (!isCurrentProfile(userId) && !hasInteractUsersFull) { 898 return new ArrayList<ScanResult>(); 899 } 900 return mWifiStateMachine.syncGetScanResultsList(); 901 } finally { 902 Binder.restoreCallingIdentity(ident); 903 } 904 } 905 906 /** 907 * Returns true if the caller holds INTERACT_ACROSS_USERS_FULL. 908 */ 909 private boolean checkInteractAcrossUsersFull() { 910 return mContext.checkCallingOrSelfPermission( 911 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL) 912 == PackageManager.PERMISSION_GRANTED; 913 } 914 915 /** 916 * Returns true if the calling user is the current one or a profile of the 917 * current user.. 918 */ 919 private boolean isCurrentProfile(int userId) { 920 int currentUser = ActivityManager.getCurrentUser(); 921 if (userId == currentUser) { 922 return true; 923 } 924 List<UserInfo> profiles = UserManager.get(mContext).getProfiles(currentUser); 925 for (UserInfo user : profiles) { 926 if (userId == user.id) { 927 return true; 928 } 929 } 930 return false; 931 } 932 933 /** 934 * Returns true if uid is an application running under the owner or a profile of the owner. 935 * 936 * Note: Should not be called if identity is cleared. 937 */ 938 private boolean isOwner(int uid) { 939 long ident = Binder.clearCallingIdentity(); 940 int userId = UserHandle.getUserId(uid); 941 try { 942 int ownerUser = UserHandle.USER_OWNER; 943 if (userId == ownerUser) { 944 return true; 945 } 946 List<UserInfo> profiles = UserManager.get(mContext).getProfiles(ownerUser); 947 for (UserInfo profile : profiles) { 948 if (userId == profile.id) { 949 return true; 950 } 951 } 952 return false; 953 } 954 finally { 955 Binder.restoreCallingIdentity(ident); 956 } 957 } 958 959 960 /** 961 * Tell the supplicant to persist the current list of configured networks. 962 * @return {@code true} if the operation succeeded 963 * 964 * TODO: deprecate this 965 */ 966 public boolean saveConfiguration() { 967 boolean result = true; 968 enforceChangePermission(); 969 if (mWifiStateMachineChannel != null) { 970 return mWifiStateMachine.syncSaveConfig(mWifiStateMachineChannel); 971 } else { 972 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 973 return false; 974 } 975 } 976 977 /** 978 * Set the country code 979 * @param countryCode ISO 3166 country code. 980 * @param persist {@code true} if the setting should be remembered. 981 * 982 * The persist behavior exists so that wifi can fall back to the last 983 * persisted country code on a restart, when the locale information is 984 * not available from telephony. 985 */ 986 public void setCountryCode(String countryCode, boolean persist) { 987 Slog.i(TAG, "WifiService trying to set country code to " + countryCode + 988 " with persist set to " + persist); 989 enforceConnectivityInternalPermission(); 990 final long token = Binder.clearCallingIdentity(); 991 try { 992 mWifiStateMachine.setCountryCode(countryCode, persist); 993 } finally { 994 Binder.restoreCallingIdentity(token); 995 } 996 } 997 998 /** 999 * Get the country code 1000 * @return ISO 3166 country code. 1001 */ 1002 public String getCountryCode() { 1003 enforceConnectivityInternalPermission(); 1004 String country = mWifiStateMachine.getCountryCode(); 1005 return country; 1006 } 1007 /** 1008 * Set the operational frequency band 1009 * @param band One of 1010 * {@link WifiManager#WIFI_FREQUENCY_BAND_AUTO}, 1011 * {@link WifiManager#WIFI_FREQUENCY_BAND_5GHZ}, 1012 * {@link WifiManager#WIFI_FREQUENCY_BAND_2GHZ}, 1013 * @param persist {@code true} if the setting should be remembered. 1014 * 1015 */ 1016 public void setFrequencyBand(int band, boolean persist) { 1017 enforceChangePermission(); 1018 if (!isDualBandSupported()) return; 1019 Slog.i(TAG, "WifiService trying to set frequency band to " + band + 1020 " with persist set to " + persist); 1021 final long token = Binder.clearCallingIdentity(); 1022 try { 1023 mWifiStateMachine.setFrequencyBand(band, persist); 1024 } finally { 1025 Binder.restoreCallingIdentity(token); 1026 } 1027 } 1028 1029 1030 /** 1031 * Get the operational frequency band 1032 */ 1033 public int getFrequencyBand() { 1034 enforceAccessPermission(); 1035 return mWifiStateMachine.getFrequencyBand(); 1036 } 1037 1038 public boolean isDualBandSupported() { 1039 //TODO: Should move towards adding a driver API that checks at runtime 1040 return mContext.getResources().getBoolean( 1041 com.android.internal.R.bool.config_wifi_dual_band_support); 1042 } 1043 1044 /** 1045 * Return the DHCP-assigned addresses from the last successful DHCP request, 1046 * if any. 1047 * @return the DHCP information 1048 * @deprecated 1049 */ 1050 public DhcpInfo getDhcpInfo() { 1051 enforceAccessPermission(); 1052 DhcpResults dhcpResults = mWifiStateMachine.syncGetDhcpResults(); 1053 1054 DhcpInfo info = new DhcpInfo(); 1055 1056 if (dhcpResults.ipAddress != null && 1057 dhcpResults.ipAddress.getAddress() instanceof Inet4Address) { 1058 info.ipAddress = NetworkUtils.inetAddressToInt((Inet4Address) dhcpResults.ipAddress.getAddress()); 1059 } 1060 1061 if (dhcpResults.gateway != null) { 1062 info.gateway = NetworkUtils.inetAddressToInt((Inet4Address) dhcpResults.gateway); 1063 } 1064 1065 int dnsFound = 0; 1066 for (InetAddress dns : dhcpResults.dnsServers) { 1067 if (dns instanceof Inet4Address) { 1068 if (dnsFound == 0) { 1069 info.dns1 = NetworkUtils.inetAddressToInt((Inet4Address)dns); 1070 } else { 1071 info.dns2 = NetworkUtils.inetAddressToInt((Inet4Address)dns); 1072 } 1073 if (++dnsFound > 1) break; 1074 } 1075 } 1076 InetAddress serverAddress = dhcpResults.serverAddress; 1077 if (serverAddress instanceof Inet4Address) { 1078 info.serverAddress = NetworkUtils.inetAddressToInt((Inet4Address)serverAddress); 1079 } 1080 info.leaseDuration = dhcpResults.leaseDuration; 1081 1082 return info; 1083 } 1084 1085 /** 1086 * see {@link android.net.wifi.WifiManager#startWifi} 1087 * 1088 */ 1089 public void startWifi() { 1090 enforceConnectivityInternalPermission(); 1091 /* TODO: may be add permissions for access only to connectivity service 1092 * TODO: if a start issued, keep wifi alive until a stop issued irrespective 1093 * of WifiLock & device idle status unless wifi enabled status is toggled 1094 */ 1095 1096 mWifiStateMachine.setDriverStart(true); 1097 mWifiStateMachine.reconnectCommand(); 1098 } 1099 1100 /** 1101 * see {@link android.net.wifi.WifiManager#stopWifi} 1102 * 1103 */ 1104 public void stopWifi() { 1105 enforceConnectivityInternalPermission(); 1106 /* 1107 * TODO: if a stop is issued, wifi is brought up only by startWifi 1108 * unless wifi enabled status is toggled 1109 */ 1110 mWifiStateMachine.setDriverStart(false); 1111 } 1112 1113 /** 1114 * see {@link android.net.wifi.WifiManager#addToBlacklist} 1115 * 1116 */ 1117 public void addToBlacklist(String bssid) { 1118 enforceChangePermission(); 1119 1120 mWifiStateMachine.addToBlacklist(bssid); 1121 } 1122 1123 /** 1124 * see {@link android.net.wifi.WifiManager#clearBlacklist} 1125 * 1126 */ 1127 public void clearBlacklist() { 1128 enforceChangePermission(); 1129 1130 mWifiStateMachine.clearBlacklist(); 1131 } 1132 1133 /** 1134 * enable TDLS for the local NIC to remote NIC 1135 * The APPs don't know the remote MAC address to identify NIC though, 1136 * so we need to do additional work to find it from remote IP address 1137 */ 1138 1139 class TdlsTaskParams { 1140 public String remoteIpAddress; 1141 public boolean enable; 1142 } 1143 1144 class TdlsTask extends AsyncTask<TdlsTaskParams, Integer, Integer> { 1145 @Override 1146 protected Integer doInBackground(TdlsTaskParams... params) { 1147 1148 // Retrieve parameters for the call 1149 TdlsTaskParams param = params[0]; 1150 String remoteIpAddress = param.remoteIpAddress.trim(); 1151 boolean enable = param.enable; 1152 1153 // Get MAC address of Remote IP 1154 String macAddress = null; 1155 1156 BufferedReader reader = null; 1157 1158 try { 1159 reader = new BufferedReader(new FileReader("/proc/net/arp")); 1160 1161 // Skip over the line bearing colum titles 1162 String line = reader.readLine(); 1163 1164 while ((line = reader.readLine()) != null) { 1165 String[] tokens = line.split("[ ]+"); 1166 if (tokens.length < 6) { 1167 continue; 1168 } 1169 1170 // ARP column format is 1171 // Address HWType HWAddress Flags Mask IFace 1172 String ip = tokens[0]; 1173 String mac = tokens[3]; 1174 1175 if (remoteIpAddress.equals(ip)) { 1176 macAddress = mac; 1177 break; 1178 } 1179 } 1180 1181 if (macAddress == null) { 1182 Slog.w(TAG, "Did not find remoteAddress {" + remoteIpAddress + "} in " + 1183 "/proc/net/arp"); 1184 } else { 1185 enableTdlsWithMacAddress(macAddress, enable); 1186 } 1187 1188 } catch (FileNotFoundException e) { 1189 Slog.e(TAG, "Could not open /proc/net/arp to lookup mac address"); 1190 } catch (IOException e) { 1191 Slog.e(TAG, "Could not read /proc/net/arp to lookup mac address"); 1192 } finally { 1193 try { 1194 if (reader != null) { 1195 reader.close(); 1196 } 1197 } 1198 catch (IOException e) { 1199 // Do nothing 1200 } 1201 } 1202 1203 return 0; 1204 } 1205 } 1206 1207 public void enableTdls(String remoteAddress, boolean enable) { 1208 if (remoteAddress == null) { 1209 throw new IllegalArgumentException("remoteAddress cannot be null"); 1210 } 1211 1212 TdlsTaskParams params = new TdlsTaskParams(); 1213 params.remoteIpAddress = remoteAddress; 1214 params.enable = enable; 1215 new TdlsTask().execute(params); 1216 } 1217 1218 1219 public void enableTdlsWithMacAddress(String remoteMacAddress, boolean enable) { 1220 if (remoteMacAddress == null) { 1221 throw new IllegalArgumentException("remoteMacAddress cannot be null"); 1222 } 1223 1224 mWifiStateMachine.enableTdls(remoteMacAddress, enable); 1225 } 1226 1227 /** 1228 * Get a reference to handler. This is used by a client to establish 1229 * an AsyncChannel communication with WifiService 1230 */ 1231 public Messenger getWifiServiceMessenger() { 1232 enforceAccessPermission(); 1233 enforceChangePermission(); 1234 return new Messenger(mClientHandler); 1235 } 1236 1237 /** 1238 * Disable an ephemeral network, i.e. network that is created thru a WiFi Scorer 1239 */ 1240 public void disableEphemeralNetwork(String SSID) { 1241 enforceAccessPermission(); 1242 enforceChangePermission(); 1243 mWifiStateMachine.disableEphemeralNetwork(SSID); 1244 } 1245 1246 /** 1247 * Get the IP and proxy configuration file 1248 */ 1249 public String getConfigFile() { 1250 enforceAccessPermission(); 1251 return mWifiStateMachine.getConfigFile(); 1252 } 1253 1254 private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 1255 @Override 1256 public void onReceive(Context context, Intent intent) { 1257 String action = intent.getAction(); 1258 if (action.equals(Intent.ACTION_SCREEN_ON)) { 1259 mWifiController.sendMessage(CMD_SCREEN_ON); 1260 } else if (action.equals(Intent.ACTION_USER_PRESENT)) { 1261 mWifiController.sendMessage(CMD_USER_PRESENT); 1262 } else if (action.equals(Intent.ACTION_SCREEN_OFF)) { 1263 mWifiController.sendMessage(CMD_SCREEN_OFF); 1264 } else if (action.equals(Intent.ACTION_BATTERY_CHANGED)) { 1265 int pluggedType = intent.getIntExtra("plugged", 0); 1266 mWifiController.sendMessage(CMD_BATTERY_CHANGED, pluggedType, 0, null); 1267 } else if (action.equals(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED)) { 1268 int state = intent.getIntExtra(BluetoothAdapter.EXTRA_CONNECTION_STATE, 1269 BluetoothAdapter.STATE_DISCONNECTED); 1270 mWifiStateMachine.sendBluetoothAdapterStateChange(state); 1271 } else if (action.equals(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED)) { 1272 boolean emergencyMode = intent.getBooleanExtra("phoneinECMState", false); 1273 mWifiController.sendMessage(CMD_EMERGENCY_MODE_CHANGED, emergencyMode ? 1 : 0, 0); 1274 } else if (action.equals(PowerManager.ACTION_DEVICE_IDLE_MODE_CHANGED)) { 1275 handleIdleModeChanged(); 1276 } 1277 } 1278 }; 1279 1280 /** 1281 * Observes settings changes to scan always mode. 1282 */ 1283 private void registerForScanModeChange() { 1284 ContentObserver contentObserver = new ContentObserver(null) { 1285 @Override 1286 public void onChange(boolean selfChange) { 1287 mSettingsStore.handleWifiScanAlwaysAvailableToggled(); 1288 mWifiController.sendMessage(CMD_SCAN_ALWAYS_MODE_CHANGED); 1289 } 1290 }; 1291 1292 mContext.getContentResolver().registerContentObserver( 1293 Settings.Global.getUriFor(Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE), 1294 false, contentObserver); 1295 } 1296 1297 private void registerForBroadcasts() { 1298 IntentFilter intentFilter = new IntentFilter(); 1299 intentFilter.addAction(Intent.ACTION_SCREEN_ON); 1300 intentFilter.addAction(Intent.ACTION_USER_PRESENT); 1301 intentFilter.addAction(Intent.ACTION_SCREEN_OFF); 1302 intentFilter.addAction(Intent.ACTION_BATTERY_CHANGED); 1303 intentFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION); 1304 intentFilter.addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED); 1305 intentFilter.addAction(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED); 1306 intentFilter.addAction(PowerManager.ACTION_DEVICE_IDLE_MODE_CHANGED); 1307 mContext.registerReceiver(mReceiver, intentFilter); 1308 } 1309 1310 private void registerForPackageOrUserRemoval() { 1311 IntentFilter intentFilter = new IntentFilter(); 1312 intentFilter.addAction(Intent.ACTION_PACKAGE_REMOVED); 1313 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 1314 mContext.registerReceiverAsUser(new BroadcastReceiver() { 1315 @Override 1316 public void onReceive(Context context, Intent intent) { 1317 switch (intent.getAction()) { 1318 case Intent.ACTION_PACKAGE_REMOVED: { 1319 if (intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) { 1320 return; 1321 } 1322 int uid = intent.getIntExtra(Intent.EXTRA_UID, -1); 1323 Uri uri = intent.getData(); 1324 if (uid == -1 || uri == null) { 1325 return; 1326 } 1327 String pkgName = uri.getSchemeSpecificPart(); 1328 mWifiStateMachine.removeAppConfigs(pkgName, uid); 1329 break; 1330 } 1331 case Intent.ACTION_USER_REMOVED: { 1332 int userHandle = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); 1333 mWifiStateMachine.removeUserConfigs(userHandle); 1334 break; 1335 } 1336 } 1337 } 1338 }, UserHandle.ALL, intentFilter, null, null); 1339 } 1340 1341 @Override 1342 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1343 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1344 != PackageManager.PERMISSION_GRANTED) { 1345 pw.println("Permission Denial: can't dump WifiService from from pid=" 1346 + Binder.getCallingPid() 1347 + ", uid=" + Binder.getCallingUid()); 1348 return; 1349 } 1350 pw.println("Wi-Fi is " + mWifiStateMachine.syncGetWifiStateByName()); 1351 pw.println("Stay-awake conditions: " + 1352 Settings.Global.getInt(mContext.getContentResolver(), 1353 Settings.Global.STAY_ON_WHILE_PLUGGED_IN, 0)); 1354 pw.println("mMulticastEnabled " + mMulticastEnabled); 1355 pw.println("mMulticastDisabled " + mMulticastDisabled); 1356 pw.println("mInIdleMode " + mInIdleMode); 1357 pw.println("mScanPending " + mScanPending); 1358 mWifiController.dump(fd, pw, args); 1359 mSettingsStore.dump(fd, pw, args); 1360 mNotificationController.dump(fd, pw, args); 1361 mTrafficPoller.dump(fd, pw, args); 1362 1363 pw.println("Latest scan results:"); 1364 List<ScanResult> scanResults = mWifiStateMachine.syncGetScanResultsList(); 1365 long nowMs = System.currentTimeMillis(); 1366 if (scanResults != null && scanResults.size() != 0) { 1367 pw.println(" BSSID Frequency RSSI Age SSID " + 1368 " Flags"); 1369 for (ScanResult r : scanResults) { 1370 long ageSec = 0; 1371 long ageMilli = 0; 1372 if (nowMs > r.seen && r.seen > 0) { 1373 ageSec = (nowMs - r.seen) / 1000; 1374 ageMilli = (nowMs - r.seen) % 1000; 1375 } 1376 String candidate = " "; 1377 if (r.isAutoJoinCandidate > 0) candidate = "+"; 1378 pw.printf(" %17s %9d %5d %3d.%03d%s %-32s %s\n", 1379 r.BSSID, 1380 r.frequency, 1381 r.level, 1382 ageSec, ageMilli, 1383 candidate, 1384 r.SSID == null ? "" : r.SSID, 1385 r.capabilities); 1386 } 1387 } 1388 pw.println(); 1389 pw.println("Locks acquired: " + mFullLocksAcquired + " full, " + 1390 mFullHighPerfLocksAcquired + " full high perf, " + 1391 mScanLocksAcquired + " scan"); 1392 pw.println("Locks released: " + mFullLocksReleased + " full, " + 1393 mFullHighPerfLocksReleased + " full high perf, " + 1394 mScanLocksReleased + " scan"); 1395 pw.println(); 1396 pw.println("Locks held:"); 1397 mLocks.dump(pw); 1398 1399 mWifiWatchdogStateMachine.dump(fd, pw, args); 1400 pw.println(); 1401 mWifiStateMachine.dump(fd, pw, args); 1402 pw.println(); 1403 } 1404 1405 private class WifiLock extends DeathRecipient { 1406 WifiLock(int lockMode, String tag, IBinder binder, WorkSource ws) { 1407 super(lockMode, tag, binder, ws); 1408 } 1409 1410 public void binderDied() { 1411 synchronized (mLocks) { 1412 releaseWifiLockLocked(mBinder); 1413 } 1414 } 1415 1416 public String toString() { 1417 return "WifiLock{" + mTag + " type=" + mMode + " binder=" + mBinder + "}"; 1418 } 1419 } 1420 1421 class LockList { 1422 private List<WifiLock> mList; 1423 1424 private LockList() { 1425 mList = new ArrayList<WifiLock>(); 1426 } 1427 1428 synchronized boolean hasLocks() { 1429 return !mList.isEmpty(); 1430 } 1431 1432 synchronized int getStrongestLockMode() { 1433 if (mList.isEmpty()) { 1434 return WifiManager.WIFI_MODE_FULL; 1435 } 1436 1437 if (mFullHighPerfLocksAcquired > mFullHighPerfLocksReleased) { 1438 return WifiManager.WIFI_MODE_FULL_HIGH_PERF; 1439 } 1440 1441 if (mFullLocksAcquired > mFullLocksReleased) { 1442 return WifiManager.WIFI_MODE_FULL; 1443 } 1444 1445 return WifiManager.WIFI_MODE_SCAN_ONLY; 1446 } 1447 1448 synchronized void updateWorkSource(WorkSource ws) { 1449 for (int i = 0; i < mLocks.mList.size(); i++) { 1450 ws.add(mLocks.mList.get(i).mWorkSource); 1451 } 1452 } 1453 1454 private void addLock(WifiLock lock) { 1455 if (findLockByBinder(lock.mBinder) < 0) { 1456 mList.add(lock); 1457 } 1458 } 1459 1460 private WifiLock removeLock(IBinder binder) { 1461 int index = findLockByBinder(binder); 1462 if (index >= 0) { 1463 WifiLock ret = mList.remove(index); 1464 ret.unlinkDeathRecipient(); 1465 return ret; 1466 } else { 1467 return null; 1468 } 1469 } 1470 1471 private int findLockByBinder(IBinder binder) { 1472 int size = mList.size(); 1473 for (int i = size - 1; i >= 0; i--) { 1474 if (mList.get(i).mBinder == binder) 1475 return i; 1476 } 1477 return -1; 1478 } 1479 1480 private void dump(PrintWriter pw) { 1481 for (WifiLock l : mList) { 1482 pw.print(" "); 1483 pw.println(l); 1484 } 1485 } 1486 } 1487 1488 void enforceWakeSourcePermission(int uid, int pid) { 1489 if (uid == android.os.Process.myUid()) { 1490 return; 1491 } 1492 mContext.enforcePermission(android.Manifest.permission.UPDATE_DEVICE_STATS, 1493 pid, uid, null); 1494 } 1495 1496 public boolean acquireWifiLock(IBinder binder, int lockMode, String tag, WorkSource ws) { 1497 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null); 1498 if (lockMode != WifiManager.WIFI_MODE_FULL && 1499 lockMode != WifiManager.WIFI_MODE_SCAN_ONLY && 1500 lockMode != WifiManager.WIFI_MODE_FULL_HIGH_PERF) { 1501 Slog.e(TAG, "Illegal argument, lockMode= " + lockMode); 1502 if (DBG) throw new IllegalArgumentException("lockMode=" + lockMode); 1503 return false; 1504 } 1505 if (ws != null && ws.size() == 0) { 1506 ws = null; 1507 } 1508 if (ws != null) { 1509 enforceWakeSourcePermission(Binder.getCallingUid(), Binder.getCallingPid()); 1510 } 1511 if (ws == null) { 1512 ws = new WorkSource(Binder.getCallingUid()); 1513 } 1514 WifiLock wifiLock = new WifiLock(lockMode, tag, binder, ws); 1515 synchronized (mLocks) { 1516 return acquireWifiLockLocked(wifiLock); 1517 } 1518 } 1519 1520 private void noteAcquireWifiLock(WifiLock wifiLock) throws RemoteException { 1521 switch(wifiLock.mMode) { 1522 case WifiManager.WIFI_MODE_FULL: 1523 case WifiManager.WIFI_MODE_FULL_HIGH_PERF: 1524 case WifiManager.WIFI_MODE_SCAN_ONLY: 1525 mBatteryStats.noteFullWifiLockAcquiredFromSource(wifiLock.mWorkSource); 1526 break; 1527 } 1528 } 1529 1530 private void noteReleaseWifiLock(WifiLock wifiLock) throws RemoteException { 1531 switch(wifiLock.mMode) { 1532 case WifiManager.WIFI_MODE_FULL: 1533 case WifiManager.WIFI_MODE_FULL_HIGH_PERF: 1534 case WifiManager.WIFI_MODE_SCAN_ONLY: 1535 mBatteryStats.noteFullWifiLockReleasedFromSource(wifiLock.mWorkSource); 1536 break; 1537 } 1538 } 1539 1540 private boolean acquireWifiLockLocked(WifiLock wifiLock) { 1541 if (DBG) Slog.d(TAG, "acquireWifiLockLocked: " + wifiLock); 1542 1543 mLocks.addLock(wifiLock); 1544 1545 long ident = Binder.clearCallingIdentity(); 1546 try { 1547 noteAcquireWifiLock(wifiLock); 1548 switch(wifiLock.mMode) { 1549 case WifiManager.WIFI_MODE_FULL: 1550 ++mFullLocksAcquired; 1551 break; 1552 case WifiManager.WIFI_MODE_FULL_HIGH_PERF: 1553 ++mFullHighPerfLocksAcquired; 1554 break; 1555 1556 case WifiManager.WIFI_MODE_SCAN_ONLY: 1557 ++mScanLocksAcquired; 1558 break; 1559 } 1560 mWifiController.sendMessage(CMD_LOCKS_CHANGED); 1561 return true; 1562 } catch (RemoteException e) { 1563 return false; 1564 } finally { 1565 Binder.restoreCallingIdentity(ident); 1566 } 1567 } 1568 1569 public void updateWifiLockWorkSource(IBinder lock, WorkSource ws) { 1570 int uid = Binder.getCallingUid(); 1571 int pid = Binder.getCallingPid(); 1572 if (ws != null && ws.size() == 0) { 1573 ws = null; 1574 } 1575 if (ws != null) { 1576 enforceWakeSourcePermission(uid, pid); 1577 } 1578 long ident = Binder.clearCallingIdentity(); 1579 try { 1580 synchronized (mLocks) { 1581 int index = mLocks.findLockByBinder(lock); 1582 if (index < 0) { 1583 throw new IllegalArgumentException("Wifi lock not active"); 1584 } 1585 WifiLock wl = mLocks.mList.get(index); 1586 noteReleaseWifiLock(wl); 1587 wl.mWorkSource = ws != null ? new WorkSource(ws) : new WorkSource(uid); 1588 noteAcquireWifiLock(wl); 1589 } 1590 } catch (RemoteException e) { 1591 } finally { 1592 Binder.restoreCallingIdentity(ident); 1593 } 1594 } 1595 1596 public boolean releaseWifiLock(IBinder lock) { 1597 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null); 1598 synchronized (mLocks) { 1599 return releaseWifiLockLocked(lock); 1600 } 1601 } 1602 1603 private boolean releaseWifiLockLocked(IBinder lock) { 1604 boolean hadLock; 1605 1606 WifiLock wifiLock = mLocks.removeLock(lock); 1607 1608 if (DBG) Slog.d(TAG, "releaseWifiLockLocked: " + wifiLock); 1609 1610 hadLock = (wifiLock != null); 1611 1612 long ident = Binder.clearCallingIdentity(); 1613 try { 1614 if (hadLock) { 1615 noteReleaseWifiLock(wifiLock); 1616 switch(wifiLock.mMode) { 1617 case WifiManager.WIFI_MODE_FULL: 1618 ++mFullLocksReleased; 1619 break; 1620 case WifiManager.WIFI_MODE_FULL_HIGH_PERF: 1621 ++mFullHighPerfLocksReleased; 1622 break; 1623 case WifiManager.WIFI_MODE_SCAN_ONLY: 1624 ++mScanLocksReleased; 1625 break; 1626 } 1627 mWifiController.sendMessage(CMD_LOCKS_CHANGED); 1628 } 1629 } catch (RemoteException e) { 1630 } finally { 1631 Binder.restoreCallingIdentity(ident); 1632 } 1633 1634 return hadLock; 1635 } 1636 1637 private abstract class DeathRecipient 1638 implements IBinder.DeathRecipient { 1639 String mTag; 1640 int mMode; 1641 IBinder mBinder; 1642 WorkSource mWorkSource; 1643 1644 DeathRecipient(int mode, String tag, IBinder binder, WorkSource ws) { 1645 super(); 1646 mTag = tag; 1647 mMode = mode; 1648 mBinder = binder; 1649 mWorkSource = ws; 1650 try { 1651 mBinder.linkToDeath(this, 0); 1652 } catch (RemoteException e) { 1653 binderDied(); 1654 } 1655 } 1656 1657 void unlinkDeathRecipient() { 1658 mBinder.unlinkToDeath(this, 0); 1659 } 1660 } 1661 1662 private class Multicaster extends DeathRecipient { 1663 Multicaster(String tag, IBinder binder) { 1664 super(Binder.getCallingUid(), tag, binder, null); 1665 } 1666 1667 public void binderDied() { 1668 Slog.e(TAG, "Multicaster binderDied"); 1669 synchronized (mMulticasters) { 1670 int i = mMulticasters.indexOf(this); 1671 if (i != -1) { 1672 removeMulticasterLocked(i, mMode); 1673 } 1674 } 1675 } 1676 1677 public String toString() { 1678 return "Multicaster{" + mTag + " binder=" + mBinder + "}"; 1679 } 1680 1681 public int getUid() { 1682 return mMode; 1683 } 1684 } 1685 1686 public void initializeMulticastFiltering() { 1687 enforceMulticastChangePermission(); 1688 1689 synchronized (mMulticasters) { 1690 // if anybody had requested filters be off, leave off 1691 if (mMulticasters.size() != 0) { 1692 return; 1693 } else { 1694 mWifiStateMachine.startFilteringMulticastV4Packets(); 1695 } 1696 } 1697 } 1698 1699 public void acquireMulticastLock(IBinder binder, String tag) { 1700 enforceMulticastChangePermission(); 1701 1702 synchronized (mMulticasters) { 1703 mMulticastEnabled++; 1704 mMulticasters.add(new Multicaster(tag, binder)); 1705 // Note that we could call stopFilteringMulticastV4Packets only when 1706 // our new size == 1 (first call), but this function won't 1707 // be called often and by making the stopPacket call each 1708 // time we're less fragile and self-healing. 1709 mWifiStateMachine.stopFilteringMulticastV4Packets(); 1710 } 1711 1712 int uid = Binder.getCallingUid(); 1713 final long ident = Binder.clearCallingIdentity(); 1714 try { 1715 mBatteryStats.noteWifiMulticastEnabled(uid); 1716 } catch (RemoteException e) { 1717 } finally { 1718 Binder.restoreCallingIdentity(ident); 1719 } 1720 } 1721 1722 public void releaseMulticastLock() { 1723 enforceMulticastChangePermission(); 1724 1725 int uid = Binder.getCallingUid(); 1726 synchronized (mMulticasters) { 1727 mMulticastDisabled++; 1728 int size = mMulticasters.size(); 1729 for (int i = size - 1; i >= 0; i--) { 1730 Multicaster m = mMulticasters.get(i); 1731 if ((m != null) && (m.getUid() == uid)) { 1732 removeMulticasterLocked(i, uid); 1733 } 1734 } 1735 } 1736 } 1737 1738 private void removeMulticasterLocked(int i, int uid) 1739 { 1740 Multicaster removed = mMulticasters.remove(i); 1741 1742 if (removed != null) { 1743 removed.unlinkDeathRecipient(); 1744 } 1745 if (mMulticasters.size() == 0) { 1746 mWifiStateMachine.startFilteringMulticastV4Packets(); 1747 } 1748 1749 final long ident = Binder.clearCallingIdentity(); 1750 try { 1751 mBatteryStats.noteWifiMulticastDisabled(uid); 1752 } catch (RemoteException e) { 1753 } finally { 1754 Binder.restoreCallingIdentity(ident); 1755 } 1756 } 1757 1758 public boolean isMulticastEnabled() { 1759 enforceAccessPermission(); 1760 1761 synchronized (mMulticasters) { 1762 return (mMulticasters.size() > 0); 1763 } 1764 } 1765 1766 public WifiMonitor getWifiMonitor() { 1767 return mWifiStateMachine.getWifiMonitor(); 1768 } 1769 1770 public void enableVerboseLogging(int verbose) { 1771 enforceAccessPermission(); 1772 mWifiStateMachine.enableVerboseLogging(verbose); 1773 } 1774 1775 public int getVerboseLoggingLevel() { 1776 enforceAccessPermission(); 1777 return mWifiStateMachine.getVerboseLoggingLevel(); 1778 } 1779 1780 public void enableAggressiveHandover(int enabled) { 1781 enforceAccessPermission(); 1782 mWifiStateMachine.enableAggressiveHandover(enabled); 1783 } 1784 1785 public int getAggressiveHandover() { 1786 enforceAccessPermission(); 1787 return mWifiStateMachine.getAggressiveHandover(); 1788 } 1789 1790 public void setAllowScansWithTraffic(int enabled) { 1791 enforceAccessPermission(); 1792 mWifiStateMachine.setAllowScansWithTraffic(enabled); 1793 } 1794 1795 public int getAllowScansWithTraffic() { 1796 enforceAccessPermission(); 1797 return mWifiStateMachine.getAllowScansWithTraffic(); 1798 } 1799 1800 public void setAllowScansWhileAssociated(boolean enabled) { 1801 enforceAccessPermission(); 1802 mWifiStateMachine.setAllowScansWhileAssociated(enabled); 1803 } 1804 1805 public boolean getAllowScansWhileAssociated() { 1806 enforceAccessPermission(); 1807 return mWifiStateMachine.getAllowScansWhileAssociated(); 1808 } 1809 1810 /* Return the Wifi Connection statistics object */ 1811 public WifiConnectionStatistics getConnectionStatistics() { 1812 enforceAccessPermission(); 1813 enforceReadCredentialPermission(); 1814 if (mWifiStateMachineChannel != null) { 1815 return mWifiStateMachine.syncGetConnectionStatistics(mWifiStateMachineChannel); 1816 } else { 1817 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 1818 return null; 1819 } 1820 } 1821 1822 public void factoryReset() { 1823 enforceConnectivityInternalPermission(); 1824 1825 // Turn mobile hotspot off 1826 setWifiApEnabled(null, false); 1827 1828 // Enable wifi 1829 setWifiEnabled(true); 1830 // Delete all Wifi SSIDs 1831 List<WifiConfiguration> networks = getConfiguredNetworks(); 1832 if (networks != null) { 1833 for (WifiConfiguration config : networks) { 1834 removeNetwork(config.networkId); 1835 } 1836 saveConfiguration(); 1837 } 1838 } 1839 1840 public Network getCurrentNetwork() { 1841 enforceAccessPermission(); 1842 return mWifiStateMachine.getCurrentNetwork(); 1843 } 1844 1845} 1846