| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.wifi; |
| |
| import android.app.ActivityManager; |
| import android.app.AlarmManager; |
| import android.app.AppOpsManager; |
| import android.app.PendingIntent; |
| import android.bluetooth.BluetoothAdapter; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.pm.PackageManager; |
| import android.net.wifi.IWifiManager; |
| import android.net.wifi.ScanResult; |
| import android.net.wifi.WifiInfo; |
| import android.net.wifi.WifiManager; |
| import android.net.wifi.WifiStateMachine; |
| import android.net.wifi.WifiConfiguration; |
| import android.net.wifi.WifiWatchdogStateMachine; |
| import android.net.ConnectivityManager; |
| import android.net.DhcpInfo; |
| import android.net.DhcpResults; |
| import android.net.LinkAddress; |
| import android.net.NetworkInfo; |
| import android.net.NetworkInfo.DetailedState; |
| import android.net.NetworkUtils; |
| import android.net.RouteInfo; |
| import android.os.Binder; |
| import android.os.Handler; |
| import android.os.Messenger; |
| import android.os.HandlerThread; |
| import android.os.IBinder; |
| import android.os.INetworkManagementService; |
| import android.os.Message; |
| import android.os.RemoteException; |
| import android.os.SystemProperties; |
| import android.os.UserHandle; |
| import android.os.WorkSource; |
| import android.provider.Settings; |
| import android.util.Log; |
| import android.util.Slog; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.net.InetAddress; |
| import java.net.Inet4Address; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import com.android.internal.app.IBatteryStats; |
| import com.android.internal.telephony.TelephonyIntents; |
| import com.android.internal.util.AsyncChannel; |
| import com.android.server.am.BatteryStatsService; |
| import com.android.internal.R; |
| |
| /** |
| * WifiService handles remote WiFi operation requests by implementing |
| * the IWifiManager interface. |
| * |
| * @hide |
| */ |
| //TODO: Clean up multiple locks and implement WifiService |
| // as a SM to track soft AP/client/adhoc bring up based |
| // on device idle state, airplane mode and boot. |
| |
| public final class WifiService extends IWifiManager.Stub { |
| private static final String TAG = "WifiService"; |
| private static final boolean DBG = false; |
| |
| private final WifiStateMachine mWifiStateMachine; |
| |
| private final Context mContext; |
| |
| private AlarmManager mAlarmManager; |
| private PendingIntent mIdleIntent; |
| private static final int IDLE_REQUEST = 0; |
| private boolean mScreenOff; |
| private boolean mDeviceIdle; |
| private boolean mEmergencyCallbackMode = false; |
| private int mPluggedType; |
| |
| private final LockList mLocks = new LockList(); |
| // some wifi lock statistics |
| private int mFullHighPerfLocksAcquired; |
| private int mFullHighPerfLocksReleased; |
| private int mFullLocksAcquired; |
| private int mFullLocksReleased; |
| private int mScanLocksAcquired; |
| private int mScanLocksReleased; |
| |
| private final List<Multicaster> mMulticasters = |
| new ArrayList<Multicaster>(); |
| private int mMulticastEnabled; |
| private int mMulticastDisabled; |
| |
| private final IBatteryStats mBatteryStats; |
| private final AppOpsManager mAppOps; |
| |
| private String mInterfaceName; |
| |
| /* Tracks the open wi-fi network notification */ |
| private WifiNotificationController mNotificationController; |
| /* Polls traffic stats and notifies clients */ |
| private WifiTrafficPoller mTrafficPoller; |
| /* Tracks the persisted states for wi-fi & airplane mode */ |
| private WifiSettingsStore mSettingsStore; |
| |
| /** |
| * See {@link Settings.Global#WIFI_IDLE_MS}. This is the default value if a |
| * Settings.Global value is not present. This timeout value is chosen as |
| * the approximate point at which the battery drain caused by Wi-Fi |
| * being enabled but not active exceeds the battery drain caused by |
| * re-establishing a connection to the mobile data network. |
| */ |
| private static final long DEFAULT_IDLE_MS = 15 * 60 * 1000; /* 15 minutes */ |
| |
| private static final String ACTION_DEVICE_IDLE = |
| "com.android.server.WifiManager.action.DEVICE_IDLE"; |
| |
| /* The work source (UID) that triggered the current WIFI scan, synchronized |
| * on this */ |
| private WorkSource mScanWorkSource; |
| |
| private boolean mIsReceiverRegistered = false; |
| |
| NetworkInfo mNetworkInfo = new NetworkInfo(ConnectivityManager.TYPE_WIFI, 0, "WIFI", ""); |
| |
| /** |
| * Asynchronous channel to WifiStateMachine |
| */ |
| private AsyncChannel mWifiStateMachineChannel; |
| |
| /** |
| * Clients receiving asynchronous messages |
| */ |
| private List<AsyncChannel> mClients = new ArrayList<AsyncChannel>(); |
| |
| /** |
| * Handles client connections |
| */ |
| private class ClientHandler extends Handler { |
| |
| ClientHandler(android.os.Looper looper) { |
| super(looper); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { |
| if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { |
| if (DBG) Slog.d(TAG, "New client listening to asynchronous messages"); |
| mClients.add((AsyncChannel) msg.obj); |
| } else { |
| Slog.e(TAG, "Client connection failure, error=" + msg.arg1); |
| } |
| break; |
| } |
| case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { |
| if (msg.arg1 == AsyncChannel.STATUS_SEND_UNSUCCESSFUL) { |
| if (DBG) Slog.d(TAG, "Send failed, client connection lost"); |
| } else { |
| if (DBG) Slog.d(TAG, "Client connection lost with reason: " + msg.arg1); |
| } |
| mClients.remove((AsyncChannel) msg.obj); |
| break; |
| } |
| case AsyncChannel.CMD_CHANNEL_FULL_CONNECTION: { |
| AsyncChannel ac = new AsyncChannel(); |
| ac.connect(mContext, this, msg.replyTo); |
| break; |
| } |
| /* Client commands are forwarded to state machine */ |
| case WifiManager.CONNECT_NETWORK: |
| case WifiManager.SAVE_NETWORK: |
| case WifiManager.FORGET_NETWORK: |
| case WifiManager.START_WPS: |
| case WifiManager.CANCEL_WPS: |
| case WifiManager.DISABLE_NETWORK: |
| case WifiManager.RSSI_PKTCNT_FETCH: { |
| mWifiStateMachine.sendMessage(Message.obtain(msg)); |
| break; |
| } |
| default: { |
| Slog.d(TAG, "WifiServicehandler.handleMessage ignoring msg=" + msg); |
| break; |
| } |
| } |
| } |
| } |
| private ClientHandler mClientHandler; |
| |
| /** |
| * Handles interaction with WifiStateMachine |
| */ |
| private class WifiStateMachineHandler extends Handler { |
| private AsyncChannel mWsmChannel; |
| |
| WifiStateMachineHandler(android.os.Looper looper) { |
| super(looper); |
| mWsmChannel = new AsyncChannel(); |
| mWsmChannel.connect(mContext, this, mWifiStateMachine.getHandler()); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { |
| if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { |
| mWifiStateMachineChannel = mWsmChannel; |
| } else { |
| Slog.e(TAG, "WifiStateMachine connection failure, error=" + msg.arg1); |
| mWifiStateMachineChannel = null; |
| } |
| break; |
| } |
| case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { |
| Slog.e(TAG, "WifiStateMachine channel lost, msg.arg1 =" + msg.arg1); |
| mWifiStateMachineChannel = null; |
| //Re-establish connection to state machine |
| mWsmChannel.connect(mContext, this, mWifiStateMachine.getHandler()); |
| break; |
| } |
| default: { |
| Slog.d(TAG, "WifiStateMachineHandler.handleMessage ignoring msg=" + msg); |
| break; |
| } |
| } |
| } |
| } |
| WifiStateMachineHandler mWifiStateMachineHandler; |
| |
| /** |
| * Temporary for computing UIDS that are responsible for starting WIFI. |
| * Protected by mWifiStateTracker lock. |
| */ |
| private final WorkSource mTmpWorkSource = new WorkSource(); |
| private WifiWatchdogStateMachine mWifiWatchdogStateMachine; |
| |
| public WifiService(Context context) { |
| mContext = context; |
| |
| mInterfaceName = SystemProperties.get("wifi.interface", "wlan0"); |
| |
| mWifiStateMachine = new WifiStateMachine(mContext, mInterfaceName); |
| mWifiStateMachine.enableRssiPolling(true); |
| mBatteryStats = BatteryStatsService.getService(); |
| mAppOps = (AppOpsManager)context.getSystemService(Context.APP_OPS_SERVICE); |
| |
| mAlarmManager = (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE); |
| Intent idleIntent = new Intent(ACTION_DEVICE_IDLE, null); |
| mIdleIntent = PendingIntent.getBroadcast(mContext, IDLE_REQUEST, idleIntent, 0); |
| |
| mNotificationController = new WifiNotificationController(mContext, mWifiStateMachine); |
| mTrafficPoller = new WifiTrafficPoller(mContext, mClients, mInterfaceName); |
| mSettingsStore = new WifiSettingsStore(mContext); |
| |
| mContext.registerReceiver( |
| new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| if (mSettingsStore.handleAirplaneModeToggled()) { |
| updateWifiState(); |
| } |
| } |
| }, |
| new IntentFilter(Intent.ACTION_AIRPLANE_MODE_CHANGED)); |
| |
| mContext.registerReceiver( |
| new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| if (intent.getAction().equals( |
| WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)) { |
| noteScanEnd(); |
| } |
| } |
| }, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)); |
| |
| HandlerThread wifiThread = new HandlerThread("WifiService"); |
| wifiThread.start(); |
| mClientHandler = new ClientHandler(wifiThread.getLooper()); |
| mWifiStateMachineHandler = new WifiStateMachineHandler(wifiThread.getLooper()); |
| } |
| |
| /** Tell battery stats about a new WIFI scan */ |
| private void noteScanStart() { |
| WorkSource scanWorkSource = null; |
| synchronized (WifiService.this) { |
| if (mScanWorkSource != null) { |
| // Scan already in progress, don't add this one to battery stats |
| return; |
| } |
| scanWorkSource = new WorkSource(Binder.getCallingUid()); |
| mScanWorkSource = scanWorkSource; |
| } |
| |
| long id = Binder.clearCallingIdentity(); |
| try { |
| mBatteryStats.noteWifiScanStartedFromSource(scanWorkSource); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } finally { |
| Binder.restoreCallingIdentity(id); |
| } |
| } |
| |
| /** Tell battery stats that the current WIFI scan has completed */ |
| private void noteScanEnd() { |
| WorkSource scanWorkSource = null; |
| synchronized (WifiService.this) { |
| scanWorkSource = mScanWorkSource; |
| mScanWorkSource = null; |
| } |
| if (scanWorkSource != null) { |
| try { |
| mBatteryStats.noteWifiScanStoppedFromSource(scanWorkSource); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } |
| } |
| } |
| |
| /** |
| * Check if Wi-Fi needs to be enabled and start |
| * if needed |
| * |
| * This function is used only at boot time |
| */ |
| public void checkAndStartWifi() { |
| /* Check if wi-fi needs to be enabled */ |
| boolean wifiEnabled = mSettingsStore.shouldWifiBeEnabled(); |
| Slog.i(TAG, "WifiService starting up with Wi-Fi " + |
| (wifiEnabled ? "enabled" : "disabled")); |
| |
| // If we are already disabled (could be due to airplane mode), avoid changing persist |
| // state here |
| if (wifiEnabled) setWifiEnabled(wifiEnabled); |
| |
| mWifiWatchdogStateMachine = WifiWatchdogStateMachine. |
| makeWifiWatchdogStateMachine(mContext); |
| |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#pingSupplicant()} |
| * @return {@code true} if the operation succeeds, {@code false} otherwise |
| */ |
| public boolean pingSupplicant() { |
| enforceAccessPermission(); |
| if (mWifiStateMachineChannel != null) { |
| return mWifiStateMachine.syncPingSupplicant(mWifiStateMachineChannel); |
| } else { |
| Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); |
| return false; |
| } |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#startScan()} |
| */ |
| public void startScan() { |
| enforceChangePermission(); |
| mWifiStateMachine.startScan(); |
| noteScanStart(); |
| } |
| |
| private void enforceAccessPermission() { |
| mContext.enforceCallingOrSelfPermission(android.Manifest.permission.ACCESS_WIFI_STATE, |
| "WifiService"); |
| } |
| |
| private void enforceChangePermission() { |
| mContext.enforceCallingOrSelfPermission(android.Manifest.permission.CHANGE_WIFI_STATE, |
| "WifiService"); |
| |
| } |
| |
| private void enforceMulticastChangePermission() { |
| mContext.enforceCallingOrSelfPermission( |
| android.Manifest.permission.CHANGE_WIFI_MULTICAST_STATE, |
| "WifiService"); |
| } |
| |
| private void enforceConnectivityInternalPermission() { |
| mContext.enforceCallingOrSelfPermission( |
| android.Manifest.permission.CONNECTIVITY_INTERNAL, |
| "ConnectivityService"); |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#setWifiEnabled(boolean)} |
| * @param enable {@code true} to enable, {@code false} to disable. |
| * @return {@code true} if the enable/disable operation was |
| * started or is already in the queue. |
| */ |
| public synchronized boolean setWifiEnabled(boolean enable) { |
| enforceChangePermission(); |
| Slog.d(TAG, "setWifiEnabled: " + enable + " pid=" + Binder.getCallingPid() |
| + ", uid=" + Binder.getCallingUid()); |
| if (DBG) { |
| Slog.e(TAG, "Invoking mWifiStateMachine.setWifiEnabled\n"); |
| } |
| |
| /* |
| * Caller might not have WRITE_SECURE_SETTINGS, |
| * only CHANGE_WIFI_STATE is enforced |
| */ |
| |
| long ident = Binder.clearCallingIdentity(); |
| try { |
| if (! mSettingsStore.handleWifiToggled(enable)) { |
| // Nothing to do if wifi cannot be toggled |
| return true; |
| } |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| |
| if (enable) { |
| reportStartWorkSource(); |
| } |
| |
| mWifiStateMachine.setWifiEnabled(enable); |
| |
| if (enable) { |
| if (!mIsReceiverRegistered) { |
| registerForBroadcasts(); |
| mIsReceiverRegistered = true; |
| } |
| } else if (mIsReceiverRegistered) { |
| mContext.unregisterReceiver(mReceiver); |
| mIsReceiverRegistered = false; |
| } |
| |
| return true; |
| } |
| |
| /** |
| * see {@link WifiManager#getWifiState()} |
| * @return One of {@link WifiManager#WIFI_STATE_DISABLED}, |
| * {@link WifiManager#WIFI_STATE_DISABLING}, |
| * {@link WifiManager#WIFI_STATE_ENABLED}, |
| * {@link WifiManager#WIFI_STATE_ENABLING}, |
| * {@link WifiManager#WIFI_STATE_UNKNOWN} |
| */ |
| public int getWifiEnabledState() { |
| enforceAccessPermission(); |
| return mWifiStateMachine.syncGetWifiState(); |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#setWifiApEnabled(WifiConfiguration, boolean)} |
| * @param wifiConfig SSID, security and channel details as |
| * part of WifiConfiguration |
| * @param enabled true to enable and false to disable |
| */ |
| public void setWifiApEnabled(WifiConfiguration wifiConfig, boolean enabled) { |
| enforceChangePermission(); |
| mWifiStateMachine.setWifiApEnabled(wifiConfig, enabled); |
| } |
| |
| /** |
| * see {@link WifiManager#getWifiApState()} |
| * @return One of {@link WifiManager#WIFI_AP_STATE_DISABLED}, |
| * {@link WifiManager#WIFI_AP_STATE_DISABLING}, |
| * {@link WifiManager#WIFI_AP_STATE_ENABLED}, |
| * {@link WifiManager#WIFI_AP_STATE_ENABLING}, |
| * {@link WifiManager#WIFI_AP_STATE_FAILED} |
| */ |
| public int getWifiApEnabledState() { |
| enforceAccessPermission(); |
| return mWifiStateMachine.syncGetWifiApState(); |
| } |
| |
| /** |
| * see {@link WifiManager#getWifiApConfiguration()} |
| * @return soft access point configuration |
| */ |
| public WifiConfiguration getWifiApConfiguration() { |
| enforceAccessPermission(); |
| return mWifiStateMachine.syncGetWifiApConfiguration(); |
| } |
| |
| /** |
| * see {@link WifiManager#setWifiApConfiguration(WifiConfiguration)} |
| * @param wifiConfig WifiConfiguration details for soft access point |
| */ |
| public void setWifiApConfiguration(WifiConfiguration wifiConfig) { |
| enforceChangePermission(); |
| if (wifiConfig == null) |
| return; |
| mWifiStateMachine.setWifiApConfiguration(wifiConfig); |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#disconnect()} |
| */ |
| public void disconnect() { |
| enforceChangePermission(); |
| mWifiStateMachine.disconnectCommand(); |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#reconnect()} |
| */ |
| public void reconnect() { |
| enforceChangePermission(); |
| mWifiStateMachine.reconnectCommand(); |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#reassociate()} |
| */ |
| public void reassociate() { |
| enforceChangePermission(); |
| mWifiStateMachine.reassociateCommand(); |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#getConfiguredNetworks()} |
| * @return the list of configured networks |
| */ |
| public List<WifiConfiguration> getConfiguredNetworks() { |
| enforceAccessPermission(); |
| if (mWifiStateMachineChannel != null) { |
| return mWifiStateMachine.syncGetConfiguredNetworks(mWifiStateMachineChannel); |
| } else { |
| Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); |
| return null; |
| } |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#addOrUpdateNetwork(WifiConfiguration)} |
| * @return the supplicant-assigned identifier for the new or updated |
| * network if the operation succeeds, or {@code -1} if it fails |
| */ |
| public int addOrUpdateNetwork(WifiConfiguration config) { |
| enforceChangePermission(); |
| if (mWifiStateMachineChannel != null) { |
| return mWifiStateMachine.syncAddOrUpdateNetwork(mWifiStateMachineChannel, config); |
| } else { |
| Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); |
| return -1; |
| } |
| } |
| |
| /** |
| * See {@link android.net.wifi.WifiManager#removeNetwork(int)} |
| * @param netId the integer that identifies the network configuration |
| * to the supplicant |
| * @return {@code true} if the operation succeeded |
| */ |
| public boolean removeNetwork(int netId) { |
| enforceChangePermission(); |
| if (mWifiStateMachineChannel != null) { |
| return mWifiStateMachine.syncRemoveNetwork(mWifiStateMachineChannel, netId); |
| } else { |
| Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); |
| return false; |
| } |
| } |
| |
| /** |
| * See {@link android.net.wifi.WifiManager#enableNetwork(int, boolean)} |
| * @param netId the integer that identifies the network configuration |
| * to the supplicant |
| * @param disableOthers if true, disable all other networks. |
| * @return {@code true} if the operation succeeded |
| */ |
| public boolean enableNetwork(int netId, boolean disableOthers) { |
| enforceChangePermission(); |
| if (mWifiStateMachineChannel != null) { |
| return mWifiStateMachine.syncEnableNetwork(mWifiStateMachineChannel, netId, |
| disableOthers); |
| } else { |
| Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); |
| return false; |
| } |
| } |
| |
| /** |
| * See {@link android.net.wifi.WifiManager#disableNetwork(int)} |
| * @param netId the integer that identifies the network configuration |
| * to the supplicant |
| * @return {@code true} if the operation succeeded |
| */ |
| public boolean disableNetwork(int netId) { |
| enforceChangePermission(); |
| if (mWifiStateMachineChannel != null) { |
| return mWifiStateMachine.syncDisableNetwork(mWifiStateMachineChannel, netId); |
| } else { |
| Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); |
| return false; |
| } |
| } |
| |
| /** |
| * See {@link android.net.wifi.WifiManager#getConnectionInfo()} |
| * @return the Wi-Fi information, contained in {@link WifiInfo}. |
| */ |
| public WifiInfo getConnectionInfo() { |
| enforceAccessPermission(); |
| /* |
| * Make sure we have the latest information, by sending |
| * a status request to the supplicant. |
| */ |
| return mWifiStateMachine.syncRequestConnectionInfo(); |
| } |
| |
| /** |
| * Return the results of the most recent access point scan, in the form of |
| * a list of {@link ScanResult} objects. |
| * @return the list of results |
| */ |
| public List<ScanResult> getScanResults(String callingPackage) { |
| enforceAccessPermission(); |
| int userId = UserHandle.getCallingUserId(); |
| int uid = Binder.getCallingUid(); |
| long ident = Binder.clearCallingIdentity(); |
| if (mAppOps.noteOp(AppOpsManager.OP_WIFI_SCAN, uid, callingPackage) |
| != AppOpsManager.MODE_ALLOWED) { |
| return new ArrayList<ScanResult>(); |
| } |
| try { |
| int currentUser = ActivityManager.getCurrentUser(); |
| if (userId != currentUser) { |
| return new ArrayList<ScanResult>(); |
| } else { |
| return mWifiStateMachine.syncGetScanResultsList(); |
| } |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| /** |
| * Tell the supplicant to persist the current list of configured networks. |
| * @return {@code true} if the operation succeeded |
| * |
| * TODO: deprecate this |
| */ |
| public boolean saveConfiguration() { |
| boolean result = true; |
| enforceChangePermission(); |
| if (mWifiStateMachineChannel != null) { |
| return mWifiStateMachine.syncSaveConfig(mWifiStateMachineChannel); |
| } else { |
| Slog.e(TAG, "mWifiStateMachineChannel is not initialized"); |
| return false; |
| } |
| } |
| |
| /** |
| * Set the country code |
| * @param countryCode ISO 3166 country code. |
| * @param persist {@code true} if the setting should be remembered. |
| * |
| * The persist behavior exists so that wifi can fall back to the last |
| * persisted country code on a restart, when the locale information is |
| * not available from telephony. |
| */ |
| public void setCountryCode(String countryCode, boolean persist) { |
| Slog.i(TAG, "WifiService trying to set country code to " + countryCode + |
| " with persist set to " + persist); |
| enforceChangePermission(); |
| mWifiStateMachine.setCountryCode(countryCode, persist); |
| } |
| |
| /** |
| * Set the operational frequency band |
| * @param band One of |
| * {@link WifiManager#WIFI_FREQUENCY_BAND_AUTO}, |
| * {@link WifiManager#WIFI_FREQUENCY_BAND_5GHZ}, |
| * {@link WifiManager#WIFI_FREQUENCY_BAND_2GHZ}, |
| * @param persist {@code true} if the setting should be remembered. |
| * |
| */ |
| public void setFrequencyBand(int band, boolean persist) { |
| enforceChangePermission(); |
| if (!isDualBandSupported()) return; |
| Slog.i(TAG, "WifiService trying to set frequency band to " + band + |
| " with persist set to " + persist); |
| mWifiStateMachine.setFrequencyBand(band, persist); |
| } |
| |
| |
| /** |
| * Get the operational frequency band |
| */ |
| public int getFrequencyBand() { |
| enforceAccessPermission(); |
| return mWifiStateMachine.getFrequencyBand(); |
| } |
| |
| public boolean isDualBandSupported() { |
| //TODO: Should move towards adding a driver API that checks at runtime |
| return mContext.getResources().getBoolean( |
| com.android.internal.R.bool.config_wifi_dual_band_support); |
| } |
| |
| /** |
| * Return the DHCP-assigned addresses from the last successful DHCP request, |
| * if any. |
| * @return the DHCP information |
| * @deprecated |
| */ |
| public DhcpInfo getDhcpInfo() { |
| enforceAccessPermission(); |
| DhcpResults dhcpResults = mWifiStateMachine.syncGetDhcpResults(); |
| if (dhcpResults.linkProperties == null) return null; |
| |
| DhcpInfo info = new DhcpInfo(); |
| for (LinkAddress la : dhcpResults.linkProperties.getLinkAddresses()) { |
| InetAddress addr = la.getAddress(); |
| if (addr instanceof Inet4Address) { |
| info.ipAddress = NetworkUtils.inetAddressToInt((Inet4Address)addr); |
| break; |
| } |
| } |
| for (RouteInfo r : dhcpResults.linkProperties.getRoutes()) { |
| if (r.isDefaultRoute()) { |
| InetAddress gateway = r.getGateway(); |
| if (gateway instanceof Inet4Address) { |
| info.gateway = NetworkUtils.inetAddressToInt((Inet4Address)gateway); |
| } |
| } else if (r.isHostRoute()) { |
| LinkAddress dest = r.getDestination(); |
| if (dest.getAddress() instanceof Inet4Address) { |
| info.netmask = NetworkUtils.prefixLengthToNetmaskInt( |
| dest.getNetworkPrefixLength()); |
| } |
| } |
| } |
| int dnsFound = 0; |
| for (InetAddress dns : dhcpResults.linkProperties.getDnses()) { |
| if (dns instanceof Inet4Address) { |
| if (dnsFound == 0) { |
| info.dns1 = NetworkUtils.inetAddressToInt((Inet4Address)dns); |
| } else { |
| info.dns2 = NetworkUtils.inetAddressToInt((Inet4Address)dns); |
| } |
| if (++dnsFound > 1) break; |
| } |
| } |
| InetAddress serverAddress = dhcpResults.serverAddress; |
| if (serverAddress instanceof Inet4Address) { |
| info.serverAddress = NetworkUtils.inetAddressToInt((Inet4Address)serverAddress); |
| } |
| info.leaseDuration = dhcpResults.leaseDuration; |
| |
| return info; |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#startWifi} |
| * |
| */ |
| public void startWifi() { |
| enforceConnectivityInternalPermission(); |
| /* TODO: may be add permissions for access only to connectivity service |
| * TODO: if a start issued, keep wifi alive until a stop issued irrespective |
| * of WifiLock & device idle status unless wifi enabled status is toggled |
| */ |
| |
| mWifiStateMachine.setDriverStart(true, mEmergencyCallbackMode); |
| mWifiStateMachine.reconnectCommand(); |
| } |
| |
| public void captivePortalCheckComplete() { |
| enforceConnectivityInternalPermission(); |
| mWifiStateMachine.captivePortalCheckComplete(); |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#stopWifi} |
| * |
| */ |
| public void stopWifi() { |
| enforceConnectivityInternalPermission(); |
| /* |
| * TODO: if a stop is issued, wifi is brought up only by startWifi |
| * unless wifi enabled status is toggled |
| */ |
| mWifiStateMachine.setDriverStart(false, mEmergencyCallbackMode); |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#addToBlacklist} |
| * |
| */ |
| public void addToBlacklist(String bssid) { |
| enforceChangePermission(); |
| |
| mWifiStateMachine.addToBlacklist(bssid); |
| } |
| |
| /** |
| * see {@link android.net.wifi.WifiManager#clearBlacklist} |
| * |
| */ |
| public void clearBlacklist() { |
| enforceChangePermission(); |
| |
| mWifiStateMachine.clearBlacklist(); |
| } |
| |
| /** |
| * Get a reference to handler. This is used by a client to establish |
| * an AsyncChannel communication with WifiService |
| */ |
| public Messenger getWifiServiceMessenger() { |
| enforceAccessPermission(); |
| enforceChangePermission(); |
| return new Messenger(mClientHandler); |
| } |
| |
| /** Get a reference to WifiStateMachine handler for AsyncChannel communication */ |
| public Messenger getWifiStateMachineMessenger() { |
| enforceAccessPermission(); |
| enforceChangePermission(); |
| return mWifiStateMachine.getMessenger(); |
| } |
| |
| /** |
| * Get the IP and proxy configuration file |
| */ |
| public String getConfigFile() { |
| enforceAccessPermission(); |
| return mWifiStateMachine.getConfigFile(); |
| } |
| |
| private final BroadcastReceiver mReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| String action = intent.getAction(); |
| |
| long idleMillis = |
| Settings.Global.getLong(mContext.getContentResolver(), |
| Settings.Global.WIFI_IDLE_MS, DEFAULT_IDLE_MS); |
| int stayAwakeConditions = |
| Settings.Global.getInt(mContext.getContentResolver(), |
| Settings.Global.STAY_ON_WHILE_PLUGGED_IN, 0); |
| if (action.equals(Intent.ACTION_SCREEN_ON)) { |
| if (DBG) { |
| Slog.d(TAG, "ACTION_SCREEN_ON"); |
| } |
| mAlarmManager.cancel(mIdleIntent); |
| mScreenOff = false; |
| setDeviceIdleAndUpdateWifi(false); |
| } else if (action.equals(Intent.ACTION_SCREEN_OFF)) { |
| if (DBG) { |
| Slog.d(TAG, "ACTION_SCREEN_OFF"); |
| } |
| mScreenOff = true; |
| /* |
| * Set a timer to put Wi-Fi to sleep, but only if the screen is off |
| * AND the "stay on while plugged in" setting doesn't match the |
| * current power conditions (i.e, not plugged in, plugged in to USB, |
| * or plugged in to AC). |
| */ |
| if (!shouldWifiStayAwake(stayAwakeConditions, mPluggedType)) { |
| //Delayed shutdown if wifi is connected |
| if (mNetworkInfo.getDetailedState() == DetailedState.CONNECTED) { |
| if (DBG) Slog.d(TAG, "setting ACTION_DEVICE_IDLE: " + idleMillis + " ms"); |
| mAlarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() |
| + idleMillis, mIdleIntent); |
| } else { |
| setDeviceIdleAndUpdateWifi(true); |
| } |
| } |
| } else if (action.equals(ACTION_DEVICE_IDLE)) { |
| setDeviceIdleAndUpdateWifi(true); |
| } else if (action.equals(Intent.ACTION_BATTERY_CHANGED)) { |
| /* |
| * Set a timer to put Wi-Fi to sleep, but only if the screen is off |
| * AND we are transitioning from a state in which the device was supposed |
| * to stay awake to a state in which it is not supposed to stay awake. |
| * If "stay awake" state is not changing, we do nothing, to avoid resetting |
| * the already-set timer. |
| */ |
| int pluggedType = intent.getIntExtra("plugged", 0); |
| if (DBG) { |
| Slog.d(TAG, "ACTION_BATTERY_CHANGED pluggedType: " + pluggedType); |
| } |
| if (mScreenOff && shouldWifiStayAwake(stayAwakeConditions, mPluggedType) && |
| !shouldWifiStayAwake(stayAwakeConditions, pluggedType)) { |
| long triggerTime = System.currentTimeMillis() + idleMillis; |
| if (DBG) { |
| Slog.d(TAG, "setting ACTION_DEVICE_IDLE timer for " + idleMillis + "ms"); |
| } |
| mAlarmManager.set(AlarmManager.RTC_WAKEUP, triggerTime, mIdleIntent); |
| } |
| |
| mPluggedType = pluggedType; |
| } else if (action.equals(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED)) { |
| int state = intent.getIntExtra(BluetoothAdapter.EXTRA_CONNECTION_STATE, |
| BluetoothAdapter.STATE_DISCONNECTED); |
| mWifiStateMachine.sendBluetoothAdapterStateChange(state); |
| } else if (action.equals(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED)) { |
| mEmergencyCallbackMode = intent.getBooleanExtra("phoneinECMState", false); |
| updateWifiState(); |
| } |
| } |
| |
| /** |
| * Determines whether the Wi-Fi chipset should stay awake or be put to |
| * sleep. Looks at the setting for the sleep policy and the current |
| * conditions. |
| * |
| * @see #shouldDeviceStayAwake(int, int) |
| */ |
| private boolean shouldWifiStayAwake(int stayAwakeConditions, int pluggedType) { |
| //Never sleep as long as the user has not changed the settings |
| int wifiSleepPolicy = Settings.Global.getInt(mContext.getContentResolver(), |
| Settings.Global.WIFI_SLEEP_POLICY, |
| Settings.Global.WIFI_SLEEP_POLICY_NEVER); |
| |
| if (wifiSleepPolicy == Settings.Global.WIFI_SLEEP_POLICY_NEVER) { |
| // Never sleep |
| return true; |
| } else if ((wifiSleepPolicy == Settings.Global.WIFI_SLEEP_POLICY_NEVER_WHILE_PLUGGED) && |
| (pluggedType != 0)) { |
| // Never sleep while plugged, and we're plugged |
| return true; |
| } else { |
| // Default |
| return shouldDeviceStayAwake(stayAwakeConditions, pluggedType); |
| } |
| } |
| |
| /** |
| * Determine whether the bit value corresponding to {@code pluggedType} is set in |
| * the bit string {@code stayAwakeConditions}. Because a {@code pluggedType} value |
| * of {@code 0} isn't really a plugged type, but rather an indication that the |
| * device isn't plugged in at all, there is no bit value corresponding to a |
| * {@code pluggedType} value of {@code 0}. That is why we shift by |
| * {@code pluggedType - 1} instead of by {@code pluggedType}. |
| * @param stayAwakeConditions a bit string specifying which "plugged types" should |
| * keep the device (and hence Wi-Fi) awake. |
| * @param pluggedType the type of plug (USB, AC, or none) for which the check is |
| * being made |
| * @return {@code true} if {@code pluggedType} indicates that the device is |
| * supposed to stay awake, {@code false} otherwise. |
| */ |
| private boolean shouldDeviceStayAwake(int stayAwakeConditions, int pluggedType) { |
| return (stayAwakeConditions & pluggedType) != 0; |
| } |
| }; |
| |
| private void setDeviceIdleAndUpdateWifi(boolean deviceIdle) { |
| mDeviceIdle = deviceIdle; |
| reportStartWorkSource(); |
| updateWifiState(); |
| } |
| |
| private synchronized void reportStartWorkSource() { |
| mTmpWorkSource.clear(); |
| if (mDeviceIdle) { |
| for (int i=0; i<mLocks.mList.size(); i++) { |
| mTmpWorkSource.add(mLocks.mList.get(i).mWorkSource); |
| } |
| } |
| mWifiStateMachine.updateBatteryWorkSource(mTmpWorkSource); |
| } |
| |
| private void updateWifiState() { |
| boolean lockHeld = mLocks.hasLocks(); |
| int strongestLockMode = WifiManager.WIFI_MODE_FULL; |
| boolean wifiShouldBeStarted; |
| |
| if (mEmergencyCallbackMode) { |
| wifiShouldBeStarted = false; |
| } else { |
| wifiShouldBeStarted = !mDeviceIdle || lockHeld; |
| } |
| |
| if (lockHeld) { |
| strongestLockMode = mLocks.getStrongestLockMode(); |
| } |
| /* If device is not idle, lockmode cannot be scan only */ |
| if (!mDeviceIdle && strongestLockMode == WifiManager.WIFI_MODE_SCAN_ONLY) { |
| strongestLockMode = WifiManager.WIFI_MODE_FULL; |
| } |
| |
| /* Disable tethering when airplane mode is enabled */ |
| if (mSettingsStore.isAirplaneModeOn()) { |
| mWifiStateMachine.setWifiApEnabled(null, false); |
| } |
| |
| if (mSettingsStore.shouldWifiBeEnabled()) { |
| if (wifiShouldBeStarted) { |
| reportStartWorkSource(); |
| mWifiStateMachine.setWifiEnabled(true); |
| mWifiStateMachine.setScanOnlyMode( |
| strongestLockMode == WifiManager.WIFI_MODE_SCAN_ONLY); |
| mWifiStateMachine.setDriverStart(true, mEmergencyCallbackMode); |
| mWifiStateMachine.setHighPerfModeEnabled(strongestLockMode |
| == WifiManager.WIFI_MODE_FULL_HIGH_PERF); |
| } else { |
| mWifiStateMachine.setDriverStart(false, mEmergencyCallbackMode); |
| } |
| } else { |
| mWifiStateMachine.setWifiEnabled(false); |
| } |
| } |
| |
| private void registerForBroadcasts() { |
| IntentFilter intentFilter = new IntentFilter(); |
| intentFilter.addAction(Intent.ACTION_SCREEN_ON); |
| intentFilter.addAction(Intent.ACTION_SCREEN_OFF); |
| intentFilter.addAction(Intent.ACTION_BATTERY_CHANGED); |
| intentFilter.addAction(ACTION_DEVICE_IDLE); |
| intentFilter.addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED); |
| intentFilter.addAction(TelephonyIntents.ACTION_EMERGENCY_CALLBACK_MODE_CHANGED); |
| mContext.registerReceiver(mReceiver, intentFilter); |
| } |
| |
| @Override |
| protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) |
| != PackageManager.PERMISSION_GRANTED) { |
| pw.println("Permission Denial: can't dump WifiService from from pid=" |
| + Binder.getCallingPid() |
| + ", uid=" + Binder.getCallingUid()); |
| return; |
| } |
| pw.println("Wi-Fi is " + mWifiStateMachine.syncGetWifiStateByName()); |
| pw.println("Stay-awake conditions: " + |
| Settings.Global.getInt(mContext.getContentResolver(), |
| Settings.Global.STAY_ON_WHILE_PLUGGED_IN, 0)); |
| pw.println("mScreenOff " + mScreenOff); |
| pw.println("mDeviceIdle " + mDeviceIdle); |
| pw.println("mPluggedType " + mPluggedType); |
| pw.println("mEmergencyCallbackMode " + mEmergencyCallbackMode); |
| pw.println("mMulticastEnabled " + mMulticastEnabled); |
| pw.println("mMulticastDisabled " + mMulticastDisabled); |
| mSettingsStore.dump(fd, pw, args); |
| mNotificationController.dump(fd, pw, args); |
| mTrafficPoller.dump(fd, pw, args); |
| |
| pw.println("Latest scan results:"); |
| List<ScanResult> scanResults = mWifiStateMachine.syncGetScanResultsList(); |
| if (scanResults != null && scanResults.size() != 0) { |
| pw.println(" BSSID Frequency RSSI Flags SSID"); |
| for (ScanResult r : scanResults) { |
| pw.printf(" %17s %9d %5d %-16s %s%n", |
| r.BSSID, |
| r.frequency, |
| r.level, |
| r.capabilities, |
| r.SSID == null ? "" : r.SSID); |
| } |
| } |
| pw.println(); |
| pw.println("Locks acquired: " + mFullLocksAcquired + " full, " + |
| mFullHighPerfLocksAcquired + " full high perf, " + |
| mScanLocksAcquired + " scan"); |
| pw.println("Locks released: " + mFullLocksReleased + " full, " + |
| mFullHighPerfLocksReleased + " full high perf, " + |
| mScanLocksReleased + " scan"); |
| pw.println(); |
| pw.println("Locks held:"); |
| mLocks.dump(pw); |
| |
| mWifiWatchdogStateMachine.dump(fd, pw, args); |
| pw.println(); |
| mWifiStateMachine.dump(fd, pw, args); |
| pw.println(); |
| } |
| |
| private class WifiLock extends DeathRecipient { |
| WifiLock(int lockMode, String tag, IBinder binder, WorkSource ws) { |
| super(lockMode, tag, binder, ws); |
| } |
| |
| public void binderDied() { |
| synchronized (mLocks) { |
| releaseWifiLockLocked(mBinder); |
| } |
| } |
| |
| public String toString() { |
| return "WifiLock{" + mTag + " type=" + mMode + " binder=" + mBinder + "}"; |
| } |
| } |
| |
| private class LockList { |
| private List<WifiLock> mList; |
| |
| private LockList() { |
| mList = new ArrayList<WifiLock>(); |
| } |
| |
| private synchronized boolean hasLocks() { |
| return !mList.isEmpty(); |
| } |
| |
| private synchronized int getStrongestLockMode() { |
| if (mList.isEmpty()) { |
| return WifiManager.WIFI_MODE_FULL; |
| } |
| |
| if (mFullHighPerfLocksAcquired > mFullHighPerfLocksReleased) { |
| return WifiManager.WIFI_MODE_FULL_HIGH_PERF; |
| } |
| |
| if (mFullLocksAcquired > mFullLocksReleased) { |
| return WifiManager.WIFI_MODE_FULL; |
| } |
| |
| return WifiManager.WIFI_MODE_SCAN_ONLY; |
| } |
| |
| private void addLock(WifiLock lock) { |
| if (findLockByBinder(lock.mBinder) < 0) { |
| mList.add(lock); |
| } |
| } |
| |
| private WifiLock removeLock(IBinder binder) { |
| int index = findLockByBinder(binder); |
| if (index >= 0) { |
| WifiLock ret = mList.remove(index); |
| ret.unlinkDeathRecipient(); |
| return ret; |
| } else { |
| return null; |
| } |
| } |
| |
| private int findLockByBinder(IBinder binder) { |
| int size = mList.size(); |
| for (int i = size - 1; i >= 0; i--) |
| if (mList.get(i).mBinder == binder) |
| return i; |
| return -1; |
| } |
| |
| private void dump(PrintWriter pw) { |
| for (WifiLock l : mList) { |
| pw.print(" "); |
| pw.println(l); |
| } |
| } |
| } |
| |
| void enforceWakeSourcePermission(int uid, int pid) { |
| if (uid == android.os.Process.myUid()) { |
| return; |
| } |
| mContext.enforcePermission(android.Manifest.permission.UPDATE_DEVICE_STATS, |
| pid, uid, null); |
| } |
| |
| public boolean acquireWifiLock(IBinder binder, int lockMode, String tag, WorkSource ws) { |
| mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null); |
| if (lockMode != WifiManager.WIFI_MODE_FULL && |
| lockMode != WifiManager.WIFI_MODE_SCAN_ONLY && |
| lockMode != WifiManager.WIFI_MODE_FULL_HIGH_PERF) { |
| Slog.e(TAG, "Illegal argument, lockMode= " + lockMode); |
| if (DBG) throw new IllegalArgumentException("lockMode=" + lockMode); |
| return false; |
| } |
| if (ws != null && ws.size() == 0) { |
| ws = null; |
| } |
| if (ws != null) { |
| enforceWakeSourcePermission(Binder.getCallingUid(), Binder.getCallingPid()); |
| } |
| if (ws == null) { |
| ws = new WorkSource(Binder.getCallingUid()); |
| } |
| WifiLock wifiLock = new WifiLock(lockMode, tag, binder, ws); |
| synchronized (mLocks) { |
| return acquireWifiLockLocked(wifiLock); |
| } |
| } |
| |
| private void noteAcquireWifiLock(WifiLock wifiLock) throws RemoteException { |
| switch(wifiLock.mMode) { |
| case WifiManager.WIFI_MODE_FULL: |
| case WifiManager.WIFI_MODE_FULL_HIGH_PERF: |
| case WifiManager.WIFI_MODE_SCAN_ONLY: |
| mBatteryStats.noteFullWifiLockAcquiredFromSource(wifiLock.mWorkSource); |
| break; |
| } |
| } |
| |
| private void noteReleaseWifiLock(WifiLock wifiLock) throws RemoteException { |
| switch(wifiLock.mMode) { |
| case WifiManager.WIFI_MODE_FULL: |
| case WifiManager.WIFI_MODE_FULL_HIGH_PERF: |
| case WifiManager.WIFI_MODE_SCAN_ONLY: |
| mBatteryStats.noteFullWifiLockReleasedFromSource(wifiLock.mWorkSource); |
| break; |
| } |
| } |
| |
| private boolean acquireWifiLockLocked(WifiLock wifiLock) { |
| if (DBG) Slog.d(TAG, "acquireWifiLockLocked: " + wifiLock); |
| |
| mLocks.addLock(wifiLock); |
| |
| long ident = Binder.clearCallingIdentity(); |
| try { |
| noteAcquireWifiLock(wifiLock); |
| switch(wifiLock.mMode) { |
| case WifiManager.WIFI_MODE_FULL: |
| ++mFullLocksAcquired; |
| break; |
| case WifiManager.WIFI_MODE_FULL_HIGH_PERF: |
| ++mFullHighPerfLocksAcquired; |
| break; |
| |
| case WifiManager.WIFI_MODE_SCAN_ONLY: |
| ++mScanLocksAcquired; |
| break; |
| } |
| |
| // Be aggressive about adding new locks into the accounted state... |
| // we want to over-report rather than under-report. |
| reportStartWorkSource(); |
| |
| updateWifiState(); |
| return true; |
| } catch (RemoteException e) { |
| return false; |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| public void updateWifiLockWorkSource(IBinder lock, WorkSource ws) { |
| int uid = Binder.getCallingUid(); |
| int pid = Binder.getCallingPid(); |
| if (ws != null && ws.size() == 0) { |
| ws = null; |
| } |
| if (ws != null) { |
| enforceWakeSourcePermission(uid, pid); |
| } |
| long ident = Binder.clearCallingIdentity(); |
| try { |
| synchronized (mLocks) { |
| int index = mLocks.findLockByBinder(lock); |
| if (index < 0) { |
| throw new IllegalArgumentException("Wifi lock not active"); |
| } |
| WifiLock wl = mLocks.mList.get(index); |
| noteReleaseWifiLock(wl); |
| wl.mWorkSource = ws != null ? new WorkSource(ws) : new WorkSource(uid); |
| noteAcquireWifiLock(wl); |
| } |
| } catch (RemoteException e) { |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| public boolean releaseWifiLock(IBinder lock) { |
| mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null); |
| synchronized (mLocks) { |
| return releaseWifiLockLocked(lock); |
| } |
| } |
| |
| private boolean releaseWifiLockLocked(IBinder lock) { |
| boolean hadLock; |
| |
| WifiLock wifiLock = mLocks.removeLock(lock); |
| |
| if (DBG) Slog.d(TAG, "releaseWifiLockLocked: " + wifiLock); |
| |
| hadLock = (wifiLock != null); |
| |
| long ident = Binder.clearCallingIdentity(); |
| try { |
| if (hadLock) { |
| noteReleaseWifiLock(wifiLock); |
| switch(wifiLock.mMode) { |
| case WifiManager.WIFI_MODE_FULL: |
| ++mFullLocksReleased; |
| break; |
| case WifiManager.WIFI_MODE_FULL_HIGH_PERF: |
| ++mFullHighPerfLocksReleased; |
| break; |
| case WifiManager.WIFI_MODE_SCAN_ONLY: |
| ++mScanLocksReleased; |
| break; |
| } |
| } |
| |
| // TODO - should this only happen if you hadLock? |
| updateWifiState(); |
| |
| } catch (RemoteException e) { |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| |
| return hadLock; |
| } |
| |
| private abstract class DeathRecipient |
| implements IBinder.DeathRecipient { |
| String mTag; |
| int mMode; |
| IBinder mBinder; |
| WorkSource mWorkSource; |
| |
| DeathRecipient(int mode, String tag, IBinder binder, WorkSource ws) { |
| super(); |
| mTag = tag; |
| mMode = mode; |
| mBinder = binder; |
| mWorkSource = ws; |
| try { |
| mBinder.linkToDeath(this, 0); |
| } catch (RemoteException e) { |
| binderDied(); |
| } |
| } |
| |
| void unlinkDeathRecipient() { |
| mBinder.unlinkToDeath(this, 0); |
| } |
| } |
| |
| private class Multicaster extends DeathRecipient { |
| Multicaster(String tag, IBinder binder) { |
| super(Binder.getCallingUid(), tag, binder, null); |
| } |
| |
| public void binderDied() { |
| Slog.e(TAG, "Multicaster binderDied"); |
| synchronized (mMulticasters) { |
| int i = mMulticasters.indexOf(this); |
| if (i != -1) { |
| removeMulticasterLocked(i, mMode); |
| } |
| } |
| } |
| |
| public String toString() { |
| return "Multicaster{" + mTag + " binder=" + mBinder + "}"; |
| } |
| |
| public int getUid() { |
| return mMode; |
| } |
| } |
| |
| public void initializeMulticastFiltering() { |
| enforceMulticastChangePermission(); |
| |
| synchronized (mMulticasters) { |
| // if anybody had requested filters be off, leave off |
| if (mMulticasters.size() != 0) { |
| return; |
| } else { |
| mWifiStateMachine.startFilteringMulticastV4Packets(); |
| } |
| } |
| } |
| |
| public void acquireMulticastLock(IBinder binder, String tag) { |
| enforceMulticastChangePermission(); |
| |
| synchronized (mMulticasters) { |
| mMulticastEnabled++; |
| mMulticasters.add(new Multicaster(tag, binder)); |
| // Note that we could call stopFilteringMulticastV4Packets only when |
| // our new size == 1 (first call), but this function won't |
| // be called often and by making the stopPacket call each |
| // time we're less fragile and self-healing. |
| mWifiStateMachine.stopFilteringMulticastV4Packets(); |
| } |
| |
| int uid = Binder.getCallingUid(); |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| mBatteryStats.noteWifiMulticastEnabled(uid); |
| } catch (RemoteException e) { |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| public void releaseMulticastLock() { |
| enforceMulticastChangePermission(); |
| |
| int uid = Binder.getCallingUid(); |
| synchronized (mMulticasters) { |
| mMulticastDisabled++; |
| int size = mMulticasters.size(); |
| for (int i = size - 1; i >= 0; i--) { |
| Multicaster m = mMulticasters.get(i); |
| if ((m != null) && (m.getUid() == uid)) { |
| removeMulticasterLocked(i, uid); |
| } |
| } |
| } |
| } |
| |
| private void removeMulticasterLocked(int i, int uid) |
| { |
| Multicaster removed = mMulticasters.remove(i); |
| |
| if (removed != null) { |
| removed.unlinkDeathRecipient(); |
| } |
| if (mMulticasters.size() == 0) { |
| mWifiStateMachine.startFilteringMulticastV4Packets(); |
| } |
| |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| mBatteryStats.noteWifiMulticastDisabled(uid); |
| } catch (RemoteException e) { |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| public boolean isMulticastEnabled() { |
| enforceAccessPermission(); |
| |
| synchronized (mMulticasters) { |
| return (mMulticasters.size() > 0); |
| } |
| } |
| } |