WifiServiceImpl.java revision e5bf4b884cbbb435dc9268dff61955bcc2b81471
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 public void startLocationRestrictedScan(WorkSource workSource) { 393 enforceChangePermission(); 394 enforceLocationHardwarePermission(); 395 synchronized (mBatchedScanners) { 396 if (mInIdleMode) { 397 mScanPending = true; 398 return; 399 } 400 } 401 List<WifiChannel> channels = getChannelList(); 402 if (channels == null) { 403 Slog.e(TAG, "startLocationRestrictedScan cant get channels"); 404 return; 405 } 406 ScanSettings settings = new ScanSettings(); 407 for (WifiChannel channel : channels) { 408 if (!channel.isDFS) { 409 settings.channelSet.add(channel); 410 } 411 } 412 if (workSource == null) { 413 // Make sure we always have a workSource indicating the origin of the scan 414 // hence if there is none, pick an internal WifiStateMachine one 415 workSource = new WorkSource(WifiStateMachine.DFS_RESTRICTED_SCAN_REQUEST); 416 } 417 startScan(settings, workSource); 418 } 419 420 /** 421 * see {@link android.net.wifi.WifiManager#startScan} 422 * and {@link android.net.wifi.WifiManager#startCustomizedScan} 423 * 424 * @param settings If null, use default parameter, i.e. full scan. 425 * @param workSource If null, all blame is given to the calling uid. 426 */ 427 public void startScan(ScanSettings settings, WorkSource workSource) { 428 enforceChangePermission(); 429 synchronized (mBatchedScanners) { 430 if (mInIdleMode) { 431 mScanPending = true; 432 return; 433 } 434 } 435 if (settings != null) { 436 settings = new ScanSettings(settings); 437 if (!settings.isValid()) { 438 Slog.e(TAG, "invalid scan setting"); 439 return; 440 } 441 } 442 if (workSource != null) { 443 enforceWorkSourcePermission(); 444 // WifiManager currently doesn't use names, so need to clear names out of the 445 // supplied WorkSource to allow future WorkSource combining. 446 workSource.clearNames(); 447 } 448 mWifiStateMachine.startScan(Binder.getCallingUid(), scanRequestCounter++, 449 settings, workSource); 450 } 451 452 public boolean isBatchedScanSupported() { 453 return false; 454 } 455 456 public void pollBatchedScan() { } 457 458 public String getWpsNfcConfigurationToken(int netId) { 459 enforceConnectivityInternalPermission(); 460 return mWifiStateMachine.syncGetWpsNfcConfigurationToken(netId); 461 } 462 463 /** 464 * see {@link android.net.wifi.WifiManager#requestBatchedScan()} 465 */ 466 public boolean requestBatchedScan(BatchedScanSettings requested, IBinder binder, 467 WorkSource workSource) { 468 return false; 469 } 470 471 public List<BatchedScanResult> getBatchedScanResults(String callingPackage) { 472 return null; 473 } 474 475 public void stopBatchedScan(BatchedScanSettings settings) { } 476 477 void handleIdleModeChanged() { 478 boolean doScan = false; 479 synchronized (mBatchedScanners) { 480 boolean idle = mPowerManager.isDeviceIdleMode(); 481 if (mInIdleMode != idle) { 482 mInIdleMode = idle; 483 if (!idle) { 484 if (mScanPending) { 485 mScanPending = false; 486 doScan = true; 487 } 488 } 489 resolveBatchedScannersLocked(); 490 } 491 } 492 if (doScan) { 493 // Someone requested a scan while we were idle; do a full scan now. 494 startScan(null, null); 495 } 496 } 497 498 private void enforceAccessPermission() { 499 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.ACCESS_WIFI_STATE, 500 "WifiService"); 501 } 502 503 private void enforceChangePermission() { 504 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.CHANGE_WIFI_STATE, 505 "WifiService"); 506 } 507 508 private void enforceLocationHardwarePermission() { 509 mContext.enforceCallingOrSelfPermission(Manifest.permission.LOCATION_HARDWARE, 510 "LocationHardware"); 511 } 512 513 private void enforceReadCredentialPermission() { 514 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.READ_WIFI_CREDENTIAL, 515 "WifiService"); 516 } 517 518 private void enforceWorkSourcePermission() { 519 mContext.enforceCallingPermission(android.Manifest.permission.UPDATE_DEVICE_STATS, 520 "WifiService"); 521 522 } 523 524 private void enforceMulticastChangePermission() { 525 mContext.enforceCallingOrSelfPermission( 526 android.Manifest.permission.CHANGE_WIFI_MULTICAST_STATE, 527 "WifiService"); 528 } 529 530 private void enforceConnectivityInternalPermission() { 531 mContext.enforceCallingOrSelfPermission( 532 android.Manifest.permission.CONNECTIVITY_INTERNAL, 533 "ConnectivityService"); 534 } 535 536 /** 537 * see {@link android.net.wifi.WifiManager#setWifiEnabled(boolean)} 538 * @param enable {@code true} to enable, {@code false} to disable. 539 * @return {@code true} if the enable/disable operation was 540 * started or is already in the queue. 541 */ 542 public synchronized boolean setWifiEnabled(boolean enable) { 543 enforceChangePermission(); 544 Slog.d(TAG, "setWifiEnabled: " + enable + " pid=" + Binder.getCallingPid() 545 + ", uid=" + Binder.getCallingUid()); 546 if (DBG) { 547 Slog.e(TAG, "Invoking mWifiStateMachine.setWifiEnabled\n"); 548 } 549 550 /* 551 * Caller might not have WRITE_SECURE_SETTINGS, 552 * only CHANGE_WIFI_STATE is enforced 553 */ 554 555 long ident = Binder.clearCallingIdentity(); 556 try { 557 if (! mSettingsStore.handleWifiToggled(enable)) { 558 // Nothing to do if wifi cannot be toggled 559 return true; 560 } 561 } finally { 562 Binder.restoreCallingIdentity(ident); 563 } 564 565 mWifiController.sendMessage(CMD_WIFI_TOGGLED); 566 return true; 567 } 568 569 /** 570 * see {@link WifiManager#getWifiState()} 571 * @return One of {@link WifiManager#WIFI_STATE_DISABLED}, 572 * {@link WifiManager#WIFI_STATE_DISABLING}, 573 * {@link WifiManager#WIFI_STATE_ENABLED}, 574 * {@link WifiManager#WIFI_STATE_ENABLING}, 575 * {@link WifiManager#WIFI_STATE_UNKNOWN} 576 */ 577 public int getWifiEnabledState() { 578 enforceAccessPermission(); 579 return mWifiStateMachine.syncGetWifiState(); 580 } 581 582 /** 583 * see {@link android.net.wifi.WifiManager#setWifiApEnabled(WifiConfiguration, boolean)} 584 * @param wifiConfig SSID, security and channel details as 585 * part of WifiConfiguration 586 * @param enabled true to enable and false to disable 587 */ 588 public void setWifiApEnabled(WifiConfiguration wifiConfig, boolean enabled) { 589 enforceChangePermission(); 590 ConnectivityManager.enforceTetherChangePermission(mContext); 591 UserManager um = UserManager.get(mContext); 592 if (um.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 593 throw new SecurityException("DISALLOW_CONFIG_TETHERING is enabled for this user."); 594 } 595 // null wifiConfig is a meaningful input for CMD_SET_AP 596 if (wifiConfig == null || wifiConfig.isValid()) { 597 mWifiController.obtainMessage(CMD_SET_AP, enabled ? 1 : 0, 0, wifiConfig).sendToTarget(); 598 } else { 599 Slog.e(TAG, "Invalid WifiConfiguration"); 600 } 601 } 602 603 /** 604 * see {@link WifiManager#getWifiApState()} 605 * @return One of {@link WifiManager#WIFI_AP_STATE_DISABLED}, 606 * {@link WifiManager#WIFI_AP_STATE_DISABLING}, 607 * {@link WifiManager#WIFI_AP_STATE_ENABLED}, 608 * {@link WifiManager#WIFI_AP_STATE_ENABLING}, 609 * {@link WifiManager#WIFI_AP_STATE_FAILED} 610 */ 611 public int getWifiApEnabledState() { 612 enforceAccessPermission(); 613 return mWifiStateMachine.syncGetWifiApState(); 614 } 615 616 /** 617 * see {@link WifiManager#getWifiApConfiguration()} 618 * @return soft access point configuration 619 */ 620 public WifiConfiguration getWifiApConfiguration() { 621 enforceAccessPermission(); 622 return mWifiStateMachine.syncGetWifiApConfiguration(); 623 } 624 625 /** 626 * see {@link WifiManager#buildWifiConfig()} 627 * @return a WifiConfiguration. 628 */ 629 public WifiConfiguration buildWifiConfig(String uriString, String mimeType, byte[] data) { 630 if (mimeType.equals(ConfigBuilder.WifiConfigType)) { 631 try { 632 return ConfigBuilder.buildConfig(uriString, data, mContext); 633 } 634 catch (IOException | GeneralSecurityException | SAXException e) { 635 Log.e(TAG, "Failed to parse wi-fi configuration: " + e); 636 } 637 } 638 else { 639 Log.i(TAG, "Unknown wi-fi config type: " + mimeType); 640 } 641 return null; 642 } 643 644 /** 645 * see {@link WifiManager#setWifiApConfiguration(WifiConfiguration)} 646 * @param wifiConfig WifiConfiguration details for soft access point 647 */ 648 public void setWifiApConfiguration(WifiConfiguration wifiConfig) { 649 enforceChangePermission(); 650 if (wifiConfig == null) 651 return; 652 if (wifiConfig.isValid()) { 653 mWifiStateMachine.setWifiApConfiguration(wifiConfig); 654 } else { 655 Slog.e(TAG, "Invalid WifiConfiguration"); 656 } 657 } 658 659 /** 660 * @param enable {@code true} to enable, {@code false} to disable. 661 * @return {@code true} if the enable/disable operation was 662 * started or is already in the queue. 663 */ 664 public boolean isScanAlwaysAvailable() { 665 enforceAccessPermission(); 666 return mSettingsStore.isScanAlwaysAvailable(); 667 } 668 669 /** 670 * see {@link android.net.wifi.WifiManager#disconnect()} 671 */ 672 public void disconnect() { 673 enforceChangePermission(); 674 mWifiStateMachine.disconnectCommand(); 675 } 676 677 /** 678 * see {@link android.net.wifi.WifiManager#reconnect()} 679 */ 680 public void reconnect() { 681 enforceChangePermission(); 682 mWifiStateMachine.reconnectCommand(); 683 } 684 685 /** 686 * see {@link android.net.wifi.WifiManager#reassociate()} 687 */ 688 public void reassociate() { 689 enforceChangePermission(); 690 mWifiStateMachine.reassociateCommand(); 691 } 692 693 /** 694 * see {@link android.net.wifi.WifiManager#getSupportedFeatures} 695 */ 696 public int getSupportedFeatures() { 697 enforceAccessPermission(); 698 if (mWifiStateMachineChannel != null) { 699 return mWifiStateMachine.syncGetSupportedFeatures(mWifiStateMachineChannel); 700 } else { 701 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 702 return 0; 703 } 704 } 705 706 /** 707 * see {@link android.net.wifi.WifiAdapter#reportActivityInfo} 708 */ 709 public WifiActivityEnergyInfo reportActivityInfo() { 710 enforceAccessPermission(); 711 WifiLinkLayerStats stats; 712 WifiActivityEnergyInfo energyInfo = null; 713 if (mWifiStateMachineChannel != null) { 714 stats = mWifiStateMachine.syncGetLinkLayerStats(mWifiStateMachineChannel); 715 if (stats != null) { 716 717 int rxIdleCurrent = 718 mContext.getResources().getInteger( 719 com.android.internal.R.integer.config_wifi_idle_receive_cur_ma); 720 int rxCurrent = 721 mContext.getResources().getInteger( 722 com.android.internal.R.integer.config_wifi_active_rx_cur_ma); 723 int txCurrent = 724 mContext.getResources().getInteger( 725 com.android.internal.R.integer.config_wifi_tx_cur_ma); 726 int voltage = 727 mContext.getResources().getInteger( 728 com.android.internal.R.integer.config_wifi_operating_voltage_mv); 729 int rxIdleTime = stats.on_time - stats.tx_time - stats.rx_time; 730 731 int energyUsed = (stats.tx_time * txCurrent + stats.rx_time * rxCurrent 732 + rxIdleTime * rxIdleCurrent ) * voltage / 1000; 733 734 // Convert the LinkLayerStats into EnergyActivity 735 energyInfo = new WifiActivityEnergyInfo(SystemClock.elapsedRealtime(), 736 WifiActivityEnergyInfo.STACK_STATE_STATE_IDLE, stats.tx_time, 737 stats.rx_time, rxIdleTime, energyUsed); 738 } 739 return energyInfo; 740 } else { 741 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 742 return null; 743 } 744 } 745 746 /** 747 * see {@link android.net.wifi.WifiManager#getConfiguredNetworks()} 748 * @return the list of configured networks 749 */ 750 public List<WifiConfiguration> getConfiguredNetworks() { 751 enforceAccessPermission(); 752 if (mWifiStateMachineChannel != null) { 753 return mWifiStateMachine.syncGetConfiguredNetworks(Binder.getCallingUid(), 754 mWifiStateMachineChannel); 755 } else { 756 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 757 return null; 758 } 759 } 760 761 /** 762 * see {@link android.net.wifi.WifiManager#getPrivilegedConfiguredNetworks()} 763 * @return the list of configured networks with real preSharedKey 764 */ 765 public List<WifiConfiguration> getPrivilegedConfiguredNetworks() { 766 enforceReadCredentialPermission(); 767 enforceAccessPermission(); 768 if (mWifiStateMachineChannel != null) { 769 return mWifiStateMachine.syncGetPrivilegedConfiguredNetwork(mWifiStateMachineChannel); 770 } else { 771 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 772 return null; 773 } 774 } 775 776 /** 777 * Returns a WifiConfiguration matching this ScanResult 778 * @param scanResult scanResult that represents the BSSID 779 * @return {@link WifiConfiguration} that matches this BSSID or null 780 */ 781 public WifiConfiguration getMatchingWifiConfig(ScanResult scanResult) { 782 enforceAccessPermission(); 783 return mWifiStateMachine.syncGetMatchingWifiConfig(scanResult, mWifiStateMachineChannel); 784 } 785 786 787 /** 788 * see {@link android.net.wifi.WifiManager#addOrUpdateNetwork(WifiConfiguration)} 789 * @return the supplicant-assigned identifier for the new or updated 790 * network if the operation succeeds, or {@code -1} if it fails 791 */ 792 public int addOrUpdateNetwork(WifiConfiguration config) { 793 enforceChangePermission(); 794 if (config.isValid()) { 795 Slog.e("addOrUpdateNetwork", " uid = " + Integer.toString(Binder.getCallingUid()) 796 + " SSID " + config.SSID 797 + " nid=" + Integer.toString(config.networkId)); 798 if (config.networkId == WifiConfiguration.INVALID_NETWORK_ID) { 799 config.creatorUid = Binder.getCallingUid(); 800 } else { 801 config.lastUpdateUid = Binder.getCallingUid(); 802 } 803 if (mWifiStateMachineChannel != null) { 804 return mWifiStateMachine.syncAddOrUpdateNetwork(mWifiStateMachineChannel, config); 805 } else { 806 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 807 return -1; 808 } 809 } else { 810 Slog.e(TAG, "bad network configuration"); 811 return -1; 812 } 813 } 814 815 /** 816 * See {@link android.net.wifi.WifiManager#removeNetwork(int)} 817 * @param netId the integer that identifies the network configuration 818 * to the supplicant 819 * @return {@code true} if the operation succeeded 820 */ 821 public boolean removeNetwork(int netId) { 822 enforceChangePermission(); 823 824 if (!isOwner(Binder.getCallingUid())) { 825 Slog.e(TAG, "Remove is not authorized for user"); 826 return false; 827 } 828 829 if (mWifiStateMachineChannel != null) { 830 return mWifiStateMachine.syncRemoveNetwork(mWifiStateMachineChannel, netId); 831 } else { 832 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 833 return false; 834 } 835 } 836 837 /** 838 * See {@link android.net.wifi.WifiManager#enableNetwork(int, boolean)} 839 * @param netId the integer that identifies the network configuration 840 * to the supplicant 841 * @param disableOthers if true, disable all other networks. 842 * @return {@code true} if the operation succeeded 843 */ 844 public boolean enableNetwork(int netId, boolean disableOthers) { 845 enforceChangePermission(); 846 if (mWifiStateMachineChannel != null) { 847 return mWifiStateMachine.syncEnableNetwork(mWifiStateMachineChannel, netId, 848 disableOthers); 849 } else { 850 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 851 return false; 852 } 853 } 854 855 /** 856 * See {@link android.net.wifi.WifiManager#disableNetwork(int)} 857 * @param netId the integer that identifies the network configuration 858 * to the supplicant 859 * @return {@code true} if the operation succeeded 860 */ 861 public boolean disableNetwork(int netId) { 862 enforceChangePermission(); 863 if (mWifiStateMachineChannel != null) { 864 return mWifiStateMachine.syncDisableNetwork(mWifiStateMachineChannel, netId); 865 } else { 866 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 867 return false; 868 } 869 } 870 871 /** 872 * See {@link android.net.wifi.WifiManager#getConnectionInfo()} 873 * @return the Wi-Fi information, contained in {@link WifiInfo}. 874 */ 875 public WifiInfo getConnectionInfo() { 876 enforceAccessPermission(); 877 /* 878 * Make sure we have the latest information, by sending 879 * a status request to the supplicant. 880 */ 881 return mWifiStateMachine.syncRequestConnectionInfo(); 882 } 883 884 /** 885 * Return the results of the most recent access point scan, in the form of 886 * a list of {@link ScanResult} objects. 887 * @return the list of results 888 */ 889 public List<ScanResult> getScanResults(String callingPackage) { 890 enforceAccessPermission(); 891 int userId = UserHandle.getCallingUserId(); 892 int uid = Binder.getCallingUid(); 893 boolean hasInteractUsersFull = checkInteractAcrossUsersFull(); 894 long ident = Binder.clearCallingIdentity(); 895 try { 896 if (mAppOps.noteOp(AppOpsManager.OP_WIFI_SCAN, uid, callingPackage) 897 != AppOpsManager.MODE_ALLOWED) { 898 return new ArrayList<ScanResult>(); 899 } 900 if (!isCurrentProfile(userId) && !hasInteractUsersFull) { 901 return new ArrayList<ScanResult>(); 902 } 903 return mWifiStateMachine.syncGetScanResultsList(); 904 } finally { 905 Binder.restoreCallingIdentity(ident); 906 } 907 } 908 909 /** 910 * Returns true if the caller holds INTERACT_ACROSS_USERS_FULL. 911 */ 912 private boolean checkInteractAcrossUsersFull() { 913 return mContext.checkCallingOrSelfPermission( 914 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL) 915 == PackageManager.PERMISSION_GRANTED; 916 } 917 918 /** 919 * Returns true if the calling user is the current one or a profile of the 920 * current user.. 921 */ 922 private boolean isCurrentProfile(int userId) { 923 int currentUser = ActivityManager.getCurrentUser(); 924 if (userId == currentUser) { 925 return true; 926 } 927 List<UserInfo> profiles = UserManager.get(mContext).getProfiles(currentUser); 928 for (UserInfo user : profiles) { 929 if (userId == user.id) { 930 return true; 931 } 932 } 933 return false; 934 } 935 936 /** 937 * Returns true if uid is an application running under the owner or a profile of the owner. 938 * 939 * Note: Should not be called if identity is cleared. 940 */ 941 private boolean isOwner(int uid) { 942 long ident = Binder.clearCallingIdentity(); 943 int userId = UserHandle.getUserId(uid); 944 try { 945 int ownerUser = UserHandle.USER_OWNER; 946 if (userId == ownerUser) { 947 return true; 948 } 949 List<UserInfo> profiles = UserManager.get(mContext).getProfiles(ownerUser); 950 for (UserInfo profile : profiles) { 951 if (userId == profile.id) { 952 return true; 953 } 954 } 955 return false; 956 } 957 finally { 958 Binder.restoreCallingIdentity(ident); 959 } 960 } 961 962 963 /** 964 * Tell the supplicant to persist the current list of configured networks. 965 * @return {@code true} if the operation succeeded 966 * 967 * TODO: deprecate this 968 */ 969 public boolean saveConfiguration() { 970 boolean result = true; 971 enforceChangePermission(); 972 if (mWifiStateMachineChannel != null) { 973 return mWifiStateMachine.syncSaveConfig(mWifiStateMachineChannel); 974 } else { 975 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 976 return false; 977 } 978 } 979 980 /** 981 * Set the country code 982 * @param countryCode ISO 3166 country code. 983 * @param persist {@code true} if the setting should be remembered. 984 * 985 * The persist behavior exists so that wifi can fall back to the last 986 * persisted country code on a restart, when the locale information is 987 * not available from telephony. 988 */ 989 public void setCountryCode(String countryCode, boolean persist) { 990 Slog.i(TAG, "WifiService trying to set country code to " + countryCode + 991 " with persist set to " + persist); 992 enforceConnectivityInternalPermission(); 993 final long token = Binder.clearCallingIdentity(); 994 try { 995 mWifiStateMachine.setCountryCode(countryCode, persist); 996 } finally { 997 Binder.restoreCallingIdentity(token); 998 } 999 } 1000 1001 /** 1002 * Get the country code 1003 * @return ISO 3166 country code. 1004 */ 1005 public String getCountryCode() { 1006 enforceConnectivityInternalPermission(); 1007 String country = mWifiStateMachine.getCountryCode(); 1008 return country; 1009 } 1010 /** 1011 * Set the operational frequency band 1012 * @param band One of 1013 * {@link WifiManager#WIFI_FREQUENCY_BAND_AUTO}, 1014 * {@link WifiManager#WIFI_FREQUENCY_BAND_5GHZ}, 1015 * {@link WifiManager#WIFI_FREQUENCY_BAND_2GHZ}, 1016 * @param persist {@code true} if the setting should be remembered. 1017 * 1018 */ 1019 public void setFrequencyBand(int band, boolean persist) { 1020 enforceChangePermission(); 1021 if (!isDualBandSupported()) return; 1022 Slog.i(TAG, "WifiService trying to set frequency band to " + band + 1023 " with persist set to " + persist); 1024 final long token = Binder.clearCallingIdentity(); 1025 try { 1026 mWifiStateMachine.setFrequencyBand(band, persist); 1027 } finally { 1028 Binder.restoreCallingIdentity(token); 1029 } 1030 } 1031 1032 1033 /** 1034 * Get the operational frequency band 1035 */ 1036 public int getFrequencyBand() { 1037 enforceAccessPermission(); 1038 return mWifiStateMachine.getFrequencyBand(); 1039 } 1040 1041 public boolean isDualBandSupported() { 1042 //TODO: Should move towards adding a driver API that checks at runtime 1043 return mContext.getResources().getBoolean( 1044 com.android.internal.R.bool.config_wifi_dual_band_support); 1045 } 1046 1047 /** 1048 * Return the DHCP-assigned addresses from the last successful DHCP request, 1049 * if any. 1050 * @return the DHCP information 1051 * @deprecated 1052 */ 1053 public DhcpInfo getDhcpInfo() { 1054 enforceAccessPermission(); 1055 DhcpResults dhcpResults = mWifiStateMachine.syncGetDhcpResults(); 1056 1057 DhcpInfo info = new DhcpInfo(); 1058 1059 if (dhcpResults.ipAddress != null && 1060 dhcpResults.ipAddress.getAddress() instanceof Inet4Address) { 1061 info.ipAddress = NetworkUtils.inetAddressToInt((Inet4Address) dhcpResults.ipAddress.getAddress()); 1062 } 1063 1064 if (dhcpResults.gateway != null) { 1065 info.gateway = NetworkUtils.inetAddressToInt((Inet4Address) dhcpResults.gateway); 1066 } 1067 1068 int dnsFound = 0; 1069 for (InetAddress dns : dhcpResults.dnsServers) { 1070 if (dns instanceof Inet4Address) { 1071 if (dnsFound == 0) { 1072 info.dns1 = NetworkUtils.inetAddressToInt((Inet4Address)dns); 1073 } else { 1074 info.dns2 = NetworkUtils.inetAddressToInt((Inet4Address)dns); 1075 } 1076 if (++dnsFound > 1) break; 1077 } 1078 } 1079 InetAddress serverAddress = dhcpResults.serverAddress; 1080 if (serverAddress instanceof Inet4Address) { 1081 info.serverAddress = NetworkUtils.inetAddressToInt((Inet4Address)serverAddress); 1082 } 1083 info.leaseDuration = dhcpResults.leaseDuration; 1084 1085 return info; 1086 } 1087 1088 /** 1089 * see {@link android.net.wifi.WifiManager#startWifi} 1090 * 1091 */ 1092 public void startWifi() { 1093 enforceConnectivityInternalPermission(); 1094 /* TODO: may be add permissions for access only to connectivity service 1095 * TODO: if a start issued, keep wifi alive until a stop issued irrespective 1096 * of WifiLock & device idle status unless wifi enabled status is toggled 1097 */ 1098 1099 mWifiStateMachine.setDriverStart(true); 1100 mWifiStateMachine.reconnectCommand(); 1101 } 1102 1103 /** 1104 * see {@link android.net.wifi.WifiManager#stopWifi} 1105 * 1106 */ 1107 public void stopWifi() { 1108 enforceConnectivityInternalPermission(); 1109 /* 1110 * TODO: if a stop is issued, wifi is brought up only by startWifi 1111 * unless wifi enabled status is toggled 1112 */ 1113 mWifiStateMachine.setDriverStart(false); 1114 } 1115 1116 /** 1117 * see {@link android.net.wifi.WifiManager#addToBlacklist} 1118 * 1119 */ 1120 public void addToBlacklist(String bssid) { 1121 enforceChangePermission(); 1122 1123 mWifiStateMachine.addToBlacklist(bssid); 1124 } 1125 1126 /** 1127 * see {@link android.net.wifi.WifiManager#clearBlacklist} 1128 * 1129 */ 1130 public void clearBlacklist() { 1131 enforceChangePermission(); 1132 1133 mWifiStateMachine.clearBlacklist(); 1134 } 1135 1136 /** 1137 * enable TDLS for the local NIC to remote NIC 1138 * The APPs don't know the remote MAC address to identify NIC though, 1139 * so we need to do additional work to find it from remote IP address 1140 */ 1141 1142 class TdlsTaskParams { 1143 public String remoteIpAddress; 1144 public boolean enable; 1145 } 1146 1147 class TdlsTask extends AsyncTask<TdlsTaskParams, Integer, Integer> { 1148 @Override 1149 protected Integer doInBackground(TdlsTaskParams... params) { 1150 1151 // Retrieve parameters for the call 1152 TdlsTaskParams param = params[0]; 1153 String remoteIpAddress = param.remoteIpAddress.trim(); 1154 boolean enable = param.enable; 1155 1156 // Get MAC address of Remote IP 1157 String macAddress = null; 1158 1159 BufferedReader reader = null; 1160 1161 try { 1162 reader = new BufferedReader(new FileReader("/proc/net/arp")); 1163 1164 // Skip over the line bearing colum titles 1165 String line = reader.readLine(); 1166 1167 while ((line = reader.readLine()) != null) { 1168 String[] tokens = line.split("[ ]+"); 1169 if (tokens.length < 6) { 1170 continue; 1171 } 1172 1173 // ARP column format is 1174 // Address HWType HWAddress Flags Mask IFace 1175 String ip = tokens[0]; 1176 String mac = tokens[3]; 1177 1178 if (remoteIpAddress.equals(ip)) { 1179 macAddress = mac; 1180 break; 1181 } 1182 } 1183 1184 if (macAddress == null) { 1185 Slog.w(TAG, "Did not find remoteAddress {" + remoteIpAddress + "} in " + 1186 "/proc/net/arp"); 1187 } else { 1188 enableTdlsWithMacAddress(macAddress, enable); 1189 } 1190 1191 } catch (FileNotFoundException e) { 1192 Slog.e(TAG, "Could not open /proc/net/arp to lookup mac address"); 1193 } catch (IOException e) { 1194 Slog.e(TAG, "Could not read /proc/net/arp to lookup mac address"); 1195 } finally { 1196 try { 1197 if (reader != null) { 1198 reader.close(); 1199 } 1200 } 1201 catch (IOException e) { 1202 // Do nothing 1203 } 1204 } 1205 1206 return 0; 1207 } 1208 } 1209 1210 public void enableTdls(String remoteAddress, boolean enable) { 1211 if (remoteAddress == null) { 1212 throw new IllegalArgumentException("remoteAddress cannot be null"); 1213 } 1214 1215 TdlsTaskParams params = new TdlsTaskParams(); 1216 params.remoteIpAddress = remoteAddress; 1217 params.enable = enable; 1218 new TdlsTask().execute(params); 1219 } 1220 1221 1222 public void enableTdlsWithMacAddress(String remoteMacAddress, boolean enable) { 1223 if (remoteMacAddress == null) { 1224 throw new IllegalArgumentException("remoteMacAddress cannot be null"); 1225 } 1226 1227 mWifiStateMachine.enableTdls(remoteMacAddress, enable); 1228 } 1229 1230 /** 1231 * Get a reference to handler. This is used by a client to establish 1232 * an AsyncChannel communication with WifiService 1233 */ 1234 public Messenger getWifiServiceMessenger() { 1235 enforceAccessPermission(); 1236 enforceChangePermission(); 1237 return new Messenger(mClientHandler); 1238 } 1239 1240 /** 1241 * Disable an ephemeral network, i.e. network that is created thru a WiFi Scorer 1242 */ 1243 public void disableEphemeralNetwork(String SSID) { 1244 enforceAccessPermission(); 1245 enforceChangePermission(); 1246 mWifiStateMachine.disableEphemeralNetwork(SSID); 1247 } 1248 1249 /** 1250 * Get the IP and proxy configuration file 1251 */ 1252 public String getConfigFile() { 1253 enforceAccessPermission(); 1254 return mWifiStateMachine.getConfigFile(); 1255 } 1256 1257 private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 1258 @Override 1259 public void onReceive(Context context, Intent intent) { 1260 String action = intent.getAction(); 1261 if (action.equals(Intent.ACTION_SCREEN_ON)) { 1262 mWifiController.sendMessage(CMD_SCREEN_ON); 1263 } else if (action.equals(Intent.ACTION_USER_PRESENT)) { 1264 mWifiController.sendMessage(CMD_USER_PRESENT); 1265 } else if (action.equals(Intent.ACTION_SCREEN_OFF)) { 1266 mWifiController.sendMessage(CMD_SCREEN_OFF); 1267 } else if (action.equals(Intent.ACTION_BATTERY_CHANGED)) { 1268 int pluggedType = intent.getIntExtra("plugged", 0); 1269 mWifiController.sendMessage(CMD_BATTERY_CHANGED, pluggedType, 0, null); 1270 } else if (action.equals(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED)) { 1271 int state = intent.getIntExtra(BluetoothAdapter.EXTRA_CONNECTION_STATE, 1272 BluetoothAdapter.STATE_DISCONNECTED); 1273 mWifiStateMachine.sendBluetoothAdapterStateChange(state); 1274 } else if (action.equals(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED)) { 1275 boolean emergencyMode = intent.getBooleanExtra("phoneinECMState", false); 1276 mWifiController.sendMessage(CMD_EMERGENCY_MODE_CHANGED, emergencyMode ? 1 : 0, 0); 1277 } else if (action.equals(PowerManager.ACTION_DEVICE_IDLE_MODE_CHANGED)) { 1278 handleIdleModeChanged(); 1279 } 1280 } 1281 }; 1282 1283 /** 1284 * Observes settings changes to scan always mode. 1285 */ 1286 private void registerForScanModeChange() { 1287 ContentObserver contentObserver = new ContentObserver(null) { 1288 @Override 1289 public void onChange(boolean selfChange) { 1290 mSettingsStore.handleWifiScanAlwaysAvailableToggled(); 1291 mWifiController.sendMessage(CMD_SCAN_ALWAYS_MODE_CHANGED); 1292 } 1293 }; 1294 1295 mContext.getContentResolver().registerContentObserver( 1296 Settings.Global.getUriFor(Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE), 1297 false, contentObserver); 1298 } 1299 1300 private void registerForBroadcasts() { 1301 IntentFilter intentFilter = new IntentFilter(); 1302 intentFilter.addAction(Intent.ACTION_SCREEN_ON); 1303 intentFilter.addAction(Intent.ACTION_USER_PRESENT); 1304 intentFilter.addAction(Intent.ACTION_SCREEN_OFF); 1305 intentFilter.addAction(Intent.ACTION_BATTERY_CHANGED); 1306 intentFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION); 1307 intentFilter.addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED); 1308 intentFilter.addAction(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED); 1309 intentFilter.addAction(PowerManager.ACTION_DEVICE_IDLE_MODE_CHANGED); 1310 mContext.registerReceiver(mReceiver, intentFilter); 1311 } 1312 1313 private void registerForPackageOrUserRemoval() { 1314 IntentFilter intentFilter = new IntentFilter(); 1315 intentFilter.addAction(Intent.ACTION_PACKAGE_REMOVED); 1316 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 1317 mContext.registerReceiverAsUser(new BroadcastReceiver() { 1318 @Override 1319 public void onReceive(Context context, Intent intent) { 1320 switch (intent.getAction()) { 1321 case Intent.ACTION_PACKAGE_REMOVED: { 1322 if (intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) { 1323 return; 1324 } 1325 int uid = intent.getIntExtra(Intent.EXTRA_UID, -1); 1326 Uri uri = intent.getData(); 1327 if (uid == -1 || uri == null) { 1328 return; 1329 } 1330 String pkgName = uri.getSchemeSpecificPart(); 1331 mWifiStateMachine.removeAppConfigs(pkgName, uid); 1332 break; 1333 } 1334 case Intent.ACTION_USER_REMOVED: { 1335 int userHandle = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); 1336 mWifiStateMachine.removeUserConfigs(userHandle); 1337 break; 1338 } 1339 } 1340 } 1341 }, UserHandle.ALL, intentFilter, null, null); 1342 } 1343 1344 @Override 1345 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1346 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1347 != PackageManager.PERMISSION_GRANTED) { 1348 pw.println("Permission Denial: can't dump WifiService from from pid=" 1349 + Binder.getCallingPid() 1350 + ", uid=" + Binder.getCallingUid()); 1351 return; 1352 } 1353 pw.println("Wi-Fi is " + mWifiStateMachine.syncGetWifiStateByName()); 1354 pw.println("Stay-awake conditions: " + 1355 Settings.Global.getInt(mContext.getContentResolver(), 1356 Settings.Global.STAY_ON_WHILE_PLUGGED_IN, 0)); 1357 pw.println("mMulticastEnabled " + mMulticastEnabled); 1358 pw.println("mMulticastDisabled " + mMulticastDisabled); 1359 pw.println("mInIdleMode " + mInIdleMode); 1360 pw.println("mScanPending " + mScanPending); 1361 mWifiController.dump(fd, pw, args); 1362 mSettingsStore.dump(fd, pw, args); 1363 mNotificationController.dump(fd, pw, args); 1364 mTrafficPoller.dump(fd, pw, args); 1365 1366 pw.println("Latest scan results:"); 1367 List<ScanResult> scanResults = mWifiStateMachine.syncGetScanResultsList(); 1368 long nowMs = System.currentTimeMillis(); 1369 if (scanResults != null && scanResults.size() != 0) { 1370 pw.println(" BSSID Frequency RSSI Age SSID " + 1371 " Flags"); 1372 for (ScanResult r : scanResults) { 1373 long ageSec = 0; 1374 long ageMilli = 0; 1375 if (nowMs > r.seen && r.seen > 0) { 1376 ageSec = (nowMs - r.seen) / 1000; 1377 ageMilli = (nowMs - r.seen) % 1000; 1378 } 1379 String candidate = " "; 1380 if (r.isAutoJoinCandidate > 0) candidate = "+"; 1381 pw.printf(" %17s %9d %5d %3d.%03d%s %-32s %s\n", 1382 r.BSSID, 1383 r.frequency, 1384 r.level, 1385 ageSec, ageMilli, 1386 candidate, 1387 r.SSID == null ? "" : r.SSID, 1388 r.capabilities); 1389 } 1390 } 1391 pw.println(); 1392 pw.println("Locks acquired: " + mFullLocksAcquired + " full, " + 1393 mFullHighPerfLocksAcquired + " full high perf, " + 1394 mScanLocksAcquired + " scan"); 1395 pw.println("Locks released: " + mFullLocksReleased + " full, " + 1396 mFullHighPerfLocksReleased + " full high perf, " + 1397 mScanLocksReleased + " scan"); 1398 pw.println(); 1399 pw.println("Locks held:"); 1400 mLocks.dump(pw); 1401 1402 mWifiWatchdogStateMachine.dump(fd, pw, args); 1403 pw.println(); 1404 mWifiStateMachine.dump(fd, pw, args); 1405 pw.println(); 1406 } 1407 1408 private class WifiLock extends DeathRecipient { 1409 WifiLock(int lockMode, String tag, IBinder binder, WorkSource ws) { 1410 super(lockMode, tag, binder, ws); 1411 } 1412 1413 public void binderDied() { 1414 synchronized (mLocks) { 1415 releaseWifiLockLocked(mBinder); 1416 } 1417 } 1418 1419 public String toString() { 1420 return "WifiLock{" + mTag + " type=" + mMode + " binder=" + mBinder + "}"; 1421 } 1422 } 1423 1424 class LockList { 1425 private List<WifiLock> mList; 1426 1427 private LockList() { 1428 mList = new ArrayList<WifiLock>(); 1429 } 1430 1431 synchronized boolean hasLocks() { 1432 return !mList.isEmpty(); 1433 } 1434 1435 synchronized int getStrongestLockMode() { 1436 if (mList.isEmpty()) { 1437 return WifiManager.WIFI_MODE_FULL; 1438 } 1439 1440 if (mFullHighPerfLocksAcquired > mFullHighPerfLocksReleased) { 1441 return WifiManager.WIFI_MODE_FULL_HIGH_PERF; 1442 } 1443 1444 if (mFullLocksAcquired > mFullLocksReleased) { 1445 return WifiManager.WIFI_MODE_FULL; 1446 } 1447 1448 return WifiManager.WIFI_MODE_SCAN_ONLY; 1449 } 1450 1451 synchronized void updateWorkSource(WorkSource ws) { 1452 for (int i = 0; i < mLocks.mList.size(); i++) { 1453 ws.add(mLocks.mList.get(i).mWorkSource); 1454 } 1455 } 1456 1457 private void addLock(WifiLock lock) { 1458 if (findLockByBinder(lock.mBinder) < 0) { 1459 mList.add(lock); 1460 } 1461 } 1462 1463 private WifiLock removeLock(IBinder binder) { 1464 int index = findLockByBinder(binder); 1465 if (index >= 0) { 1466 WifiLock ret = mList.remove(index); 1467 ret.unlinkDeathRecipient(); 1468 return ret; 1469 } else { 1470 return null; 1471 } 1472 } 1473 1474 private int findLockByBinder(IBinder binder) { 1475 int size = mList.size(); 1476 for (int i = size - 1; i >= 0; i--) { 1477 if (mList.get(i).mBinder == binder) 1478 return i; 1479 } 1480 return -1; 1481 } 1482 1483 private void dump(PrintWriter pw) { 1484 for (WifiLock l : mList) { 1485 pw.print(" "); 1486 pw.println(l); 1487 } 1488 } 1489 } 1490 1491 void enforceWakeSourcePermission(int uid, int pid) { 1492 if (uid == android.os.Process.myUid()) { 1493 return; 1494 } 1495 mContext.enforcePermission(android.Manifest.permission.UPDATE_DEVICE_STATS, 1496 pid, uid, null); 1497 } 1498 1499 public boolean acquireWifiLock(IBinder binder, int lockMode, String tag, WorkSource ws) { 1500 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null); 1501 if (lockMode != WifiManager.WIFI_MODE_FULL && 1502 lockMode != WifiManager.WIFI_MODE_SCAN_ONLY && 1503 lockMode != WifiManager.WIFI_MODE_FULL_HIGH_PERF) { 1504 Slog.e(TAG, "Illegal argument, lockMode= " + lockMode); 1505 if (DBG) throw new IllegalArgumentException("lockMode=" + lockMode); 1506 return false; 1507 } 1508 if (ws != null && ws.size() == 0) { 1509 ws = null; 1510 } 1511 if (ws != null) { 1512 enforceWakeSourcePermission(Binder.getCallingUid(), Binder.getCallingPid()); 1513 } 1514 if (ws == null) { 1515 ws = new WorkSource(Binder.getCallingUid()); 1516 } 1517 WifiLock wifiLock = new WifiLock(lockMode, tag, binder, ws); 1518 synchronized (mLocks) { 1519 return acquireWifiLockLocked(wifiLock); 1520 } 1521 } 1522 1523 private void noteAcquireWifiLock(WifiLock wifiLock) throws RemoteException { 1524 switch(wifiLock.mMode) { 1525 case WifiManager.WIFI_MODE_FULL: 1526 case WifiManager.WIFI_MODE_FULL_HIGH_PERF: 1527 case WifiManager.WIFI_MODE_SCAN_ONLY: 1528 mBatteryStats.noteFullWifiLockAcquiredFromSource(wifiLock.mWorkSource); 1529 break; 1530 } 1531 } 1532 1533 private void noteReleaseWifiLock(WifiLock wifiLock) throws RemoteException { 1534 switch(wifiLock.mMode) { 1535 case WifiManager.WIFI_MODE_FULL: 1536 case WifiManager.WIFI_MODE_FULL_HIGH_PERF: 1537 case WifiManager.WIFI_MODE_SCAN_ONLY: 1538 mBatteryStats.noteFullWifiLockReleasedFromSource(wifiLock.mWorkSource); 1539 break; 1540 } 1541 } 1542 1543 private boolean acquireWifiLockLocked(WifiLock wifiLock) { 1544 if (DBG) Slog.d(TAG, "acquireWifiLockLocked: " + wifiLock); 1545 1546 mLocks.addLock(wifiLock); 1547 1548 long ident = Binder.clearCallingIdentity(); 1549 try { 1550 noteAcquireWifiLock(wifiLock); 1551 switch(wifiLock.mMode) { 1552 case WifiManager.WIFI_MODE_FULL: 1553 ++mFullLocksAcquired; 1554 break; 1555 case WifiManager.WIFI_MODE_FULL_HIGH_PERF: 1556 ++mFullHighPerfLocksAcquired; 1557 break; 1558 1559 case WifiManager.WIFI_MODE_SCAN_ONLY: 1560 ++mScanLocksAcquired; 1561 break; 1562 } 1563 mWifiController.sendMessage(CMD_LOCKS_CHANGED); 1564 return true; 1565 } catch (RemoteException e) { 1566 return false; 1567 } finally { 1568 Binder.restoreCallingIdentity(ident); 1569 } 1570 } 1571 1572 public void updateWifiLockWorkSource(IBinder lock, WorkSource ws) { 1573 int uid = Binder.getCallingUid(); 1574 int pid = Binder.getCallingPid(); 1575 if (ws != null && ws.size() == 0) { 1576 ws = null; 1577 } 1578 if (ws != null) { 1579 enforceWakeSourcePermission(uid, pid); 1580 } 1581 long ident = Binder.clearCallingIdentity(); 1582 try { 1583 synchronized (mLocks) { 1584 int index = mLocks.findLockByBinder(lock); 1585 if (index < 0) { 1586 throw new IllegalArgumentException("Wifi lock not active"); 1587 } 1588 WifiLock wl = mLocks.mList.get(index); 1589 noteReleaseWifiLock(wl); 1590 wl.mWorkSource = ws != null ? new WorkSource(ws) : new WorkSource(uid); 1591 noteAcquireWifiLock(wl); 1592 } 1593 } catch (RemoteException e) { 1594 } finally { 1595 Binder.restoreCallingIdentity(ident); 1596 } 1597 } 1598 1599 public boolean releaseWifiLock(IBinder lock) { 1600 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null); 1601 synchronized (mLocks) { 1602 return releaseWifiLockLocked(lock); 1603 } 1604 } 1605 1606 private boolean releaseWifiLockLocked(IBinder lock) { 1607 boolean hadLock; 1608 1609 WifiLock wifiLock = mLocks.removeLock(lock); 1610 1611 if (DBG) Slog.d(TAG, "releaseWifiLockLocked: " + wifiLock); 1612 1613 hadLock = (wifiLock != null); 1614 1615 long ident = Binder.clearCallingIdentity(); 1616 try { 1617 if (hadLock) { 1618 noteReleaseWifiLock(wifiLock); 1619 switch(wifiLock.mMode) { 1620 case WifiManager.WIFI_MODE_FULL: 1621 ++mFullLocksReleased; 1622 break; 1623 case WifiManager.WIFI_MODE_FULL_HIGH_PERF: 1624 ++mFullHighPerfLocksReleased; 1625 break; 1626 case WifiManager.WIFI_MODE_SCAN_ONLY: 1627 ++mScanLocksReleased; 1628 break; 1629 } 1630 mWifiController.sendMessage(CMD_LOCKS_CHANGED); 1631 } 1632 } catch (RemoteException e) { 1633 } finally { 1634 Binder.restoreCallingIdentity(ident); 1635 } 1636 1637 return hadLock; 1638 } 1639 1640 private abstract class DeathRecipient 1641 implements IBinder.DeathRecipient { 1642 String mTag; 1643 int mMode; 1644 IBinder mBinder; 1645 WorkSource mWorkSource; 1646 1647 DeathRecipient(int mode, String tag, IBinder binder, WorkSource ws) { 1648 super(); 1649 mTag = tag; 1650 mMode = mode; 1651 mBinder = binder; 1652 mWorkSource = ws; 1653 try { 1654 mBinder.linkToDeath(this, 0); 1655 } catch (RemoteException e) { 1656 binderDied(); 1657 } 1658 } 1659 1660 void unlinkDeathRecipient() { 1661 mBinder.unlinkToDeath(this, 0); 1662 } 1663 } 1664 1665 private class Multicaster extends DeathRecipient { 1666 Multicaster(String tag, IBinder binder) { 1667 super(Binder.getCallingUid(), tag, binder, null); 1668 } 1669 1670 public void binderDied() { 1671 Slog.e(TAG, "Multicaster binderDied"); 1672 synchronized (mMulticasters) { 1673 int i = mMulticasters.indexOf(this); 1674 if (i != -1) { 1675 removeMulticasterLocked(i, mMode); 1676 } 1677 } 1678 } 1679 1680 public String toString() { 1681 return "Multicaster{" + mTag + " binder=" + mBinder + "}"; 1682 } 1683 1684 public int getUid() { 1685 return mMode; 1686 } 1687 } 1688 1689 public void initializeMulticastFiltering() { 1690 enforceMulticastChangePermission(); 1691 1692 synchronized (mMulticasters) { 1693 // if anybody had requested filters be off, leave off 1694 if (mMulticasters.size() != 0) { 1695 return; 1696 } else { 1697 mWifiStateMachine.startFilteringMulticastV4Packets(); 1698 } 1699 } 1700 } 1701 1702 public void acquireMulticastLock(IBinder binder, String tag) { 1703 enforceMulticastChangePermission(); 1704 1705 synchronized (mMulticasters) { 1706 mMulticastEnabled++; 1707 mMulticasters.add(new Multicaster(tag, binder)); 1708 // Note that we could call stopFilteringMulticastV4Packets only when 1709 // our new size == 1 (first call), but this function won't 1710 // be called often and by making the stopPacket call each 1711 // time we're less fragile and self-healing. 1712 mWifiStateMachine.stopFilteringMulticastV4Packets(); 1713 } 1714 1715 int uid = Binder.getCallingUid(); 1716 final long ident = Binder.clearCallingIdentity(); 1717 try { 1718 mBatteryStats.noteWifiMulticastEnabled(uid); 1719 } catch (RemoteException e) { 1720 } finally { 1721 Binder.restoreCallingIdentity(ident); 1722 } 1723 } 1724 1725 public void releaseMulticastLock() { 1726 enforceMulticastChangePermission(); 1727 1728 int uid = Binder.getCallingUid(); 1729 synchronized (mMulticasters) { 1730 mMulticastDisabled++; 1731 int size = mMulticasters.size(); 1732 for (int i = size - 1; i >= 0; i--) { 1733 Multicaster m = mMulticasters.get(i); 1734 if ((m != null) && (m.getUid() == uid)) { 1735 removeMulticasterLocked(i, uid); 1736 } 1737 } 1738 } 1739 } 1740 1741 private void removeMulticasterLocked(int i, int uid) 1742 { 1743 Multicaster removed = mMulticasters.remove(i); 1744 1745 if (removed != null) { 1746 removed.unlinkDeathRecipient(); 1747 } 1748 if (mMulticasters.size() == 0) { 1749 mWifiStateMachine.startFilteringMulticastV4Packets(); 1750 } 1751 1752 final long ident = Binder.clearCallingIdentity(); 1753 try { 1754 mBatteryStats.noteWifiMulticastDisabled(uid); 1755 } catch (RemoteException e) { 1756 } finally { 1757 Binder.restoreCallingIdentity(ident); 1758 } 1759 } 1760 1761 public boolean isMulticastEnabled() { 1762 enforceAccessPermission(); 1763 1764 synchronized (mMulticasters) { 1765 return (mMulticasters.size() > 0); 1766 } 1767 } 1768 1769 public WifiMonitor getWifiMonitor() { 1770 return mWifiStateMachine.getWifiMonitor(); 1771 } 1772 1773 public void enableVerboseLogging(int verbose) { 1774 enforceAccessPermission(); 1775 mWifiStateMachine.enableVerboseLogging(verbose); 1776 } 1777 1778 public int getVerboseLoggingLevel() { 1779 enforceAccessPermission(); 1780 return mWifiStateMachine.getVerboseLoggingLevel(); 1781 } 1782 1783 public void enableAggressiveHandover(int enabled) { 1784 enforceAccessPermission(); 1785 mWifiStateMachine.enableAggressiveHandover(enabled); 1786 } 1787 1788 public int getAggressiveHandover() { 1789 enforceAccessPermission(); 1790 return mWifiStateMachine.getAggressiveHandover(); 1791 } 1792 1793 public void setAllowScansWithTraffic(int enabled) { 1794 enforceAccessPermission(); 1795 mWifiStateMachine.setAllowScansWithTraffic(enabled); 1796 } 1797 1798 public int getAllowScansWithTraffic() { 1799 enforceAccessPermission(); 1800 return mWifiStateMachine.getAllowScansWithTraffic(); 1801 } 1802 1803 public void setAllowScansWhileAssociated(boolean enabled) { 1804 enforceAccessPermission(); 1805 mWifiStateMachine.setAllowScansWhileAssociated(enabled); 1806 } 1807 1808 public boolean getAllowScansWhileAssociated() { 1809 enforceAccessPermission(); 1810 return mWifiStateMachine.getAllowScansWhileAssociated(); 1811 } 1812 1813 /* Return the Wifi Connection statistics object */ 1814 public WifiConnectionStatistics getConnectionStatistics() { 1815 enforceAccessPermission(); 1816 enforceReadCredentialPermission(); 1817 if (mWifiStateMachineChannel != null) { 1818 return mWifiStateMachine.syncGetConnectionStatistics(mWifiStateMachineChannel); 1819 } else { 1820 Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); 1821 return null; 1822 } 1823 } 1824 1825 public void factoryReset() { 1826 enforceConnectivityInternalPermission(); 1827 1828 // Turn mobile hotspot off 1829 setWifiApEnabled(null, false); 1830 1831 // Enable wifi 1832 setWifiEnabled(true); 1833 // Delete all Wifi SSIDs 1834 List<WifiConfiguration> networks = getConfiguredNetworks(); 1835 if (networks != null) { 1836 for (WifiConfiguration config : networks) { 1837 removeNetwork(config.networkId); 1838 } 1839 saveConfiguration(); 1840 } 1841 } 1842 1843 public Network getCurrentNetwork() { 1844 enforceAccessPermission(); 1845 return mWifiStateMachine.getCurrentNetwork(); 1846 } 1847 1848} 1849