diff options
Diffstat (limited to 'services/java/com/android/server/WifiService.java')
| -rw-r--r-- | services/java/com/android/server/WifiService.java | 1835 |
1 files changed, 478 insertions, 1357 deletions
diff --git a/services/java/com/android/server/WifiService.java b/services/java/com/android/server/WifiService.java index 0eca082..8b02355 100644 --- a/services/java/com/android/server/WifiService.java +++ b/services/java/com/android/server/WifiService.java @@ -1,5 +1,5 @@ /* - * Copyright (C) 2008 The Android Open Source Project + * 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. @@ -16,19 +16,9 @@ package com.android.server; -import static android.net.wifi.WifiManager.WIFI_STATE_DISABLED; -import static android.net.wifi.WifiManager.WIFI_STATE_DISABLING; -import static android.net.wifi.WifiManager.WIFI_STATE_ENABLED; -import static android.net.wifi.WifiManager.WIFI_STATE_ENABLING; -import static android.net.wifi.WifiManager.WIFI_STATE_UNKNOWN; - -import static android.net.wifi.WifiManager.WIFI_AP_STATE_DISABLED; -import static android.net.wifi.WifiManager.WIFI_AP_STATE_DISABLING; -import static android.net.wifi.WifiManager.WIFI_AP_STATE_ENABLED; -import static android.net.wifi.WifiManager.WIFI_AP_STATE_ENABLING; -import static android.net.wifi.WifiManager.WIFI_AP_STATE_FAILED; - import android.app.AlarmManager; +import android.app.Notification; +import android.app.NotificationManager; import android.app.PendingIntent; import android.bluetooth.BluetoothA2dp; import android.bluetooth.BluetoothDevice; @@ -38,69 +28,60 @@ import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.pm.PackageManager; +import android.database.ContentObserver; import android.net.wifi.IWifiManager; import android.net.wifi.WifiInfo; import android.net.wifi.WifiManager; -import android.net.wifi.WifiNative; -import android.net.wifi.WifiStateTracker; +import android.net.wifi.WifiStateMachine; import android.net.wifi.ScanResult; import android.net.wifi.WifiConfiguration; import android.net.wifi.SupplicantState; import android.net.wifi.WifiConfiguration.KeyMgmt; import android.net.ConnectivityManager; import android.net.InterfaceConfiguration; -import android.net.NetworkStateTracker; import android.net.DhcpInfo; -import android.net.NetworkUtils; +import android.net.NetworkInfo; +import android.net.NetworkInfo.State; import android.os.Binder; import android.os.Handler; import android.os.HandlerThread; import android.os.IBinder; import android.os.INetworkManagementService; -import android.os.Looper; import android.os.Message; -import android.os.PowerManager; -import android.os.Process; import android.os.RemoteException; import android.os.ServiceManager; import android.provider.Settings; -import android.util.Slog; import android.text.TextUtils; +import android.util.Slog; import java.util.ArrayList; -import java.util.BitSet; -import java.util.HashMap; -import java.util.LinkedHashMap; import java.util.List; -import java.util.Map; import java.util.Set; -import java.util.regex.Pattern; +import java.util.concurrent.atomic.AtomicBoolean; import java.io.FileDescriptor; import java.io.PrintWriter; -import java.net.UnknownHostException; import com.android.internal.app.IBatteryStats; -import android.app.backup.IBackupManager; import com.android.server.am.BatteryStatsService; import com.android.internal.R; /** * WifiService handles remote WiFi operation requests by implementing - * the IWifiManager interface. It also creates a WifiMonitor to listen - * for Wifi-related events. + * 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 class WifiService extends IWifiManager.Stub { private static final String TAG = "WifiService"; - private static final boolean DBG = false; - private static final Pattern scanResultPattern = Pattern.compile("\t+"); - private final WifiStateTracker mWifiStateTracker; - /* TODO: fetch a configurable interface */ - private static final String SOFTAP_IFACE = "wl0.1"; + private static final boolean DBG = true; + + private final WifiStateMachine mWifiStateMachine; private Context mContext; - private int mWifiApState; private AlarmManager mAlarmManager; private PendingIntent mIdleIntent; @@ -109,15 +90,11 @@ public class WifiService extends IWifiManager.Stub { private boolean mDeviceIdle; private int mPluggedType; - private enum DriverAction {DRIVER_UNLOAD, NO_DRIVER_UNLOAD}; - // true if the user enabled Wifi while in airplane mode - private boolean mAirplaneModeOverwridden; + private AtomicBoolean mAirplaneModeOverwridden = new AtomicBoolean(false); 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; @@ -130,9 +107,7 @@ public class WifiService extends IWifiManager.Stub { private final IBatteryStats mBatteryStats; - private INetworkManagementService nwService; ConnectivityManager mCm; - private WifiWatchdogService mWifiWatchdogService = null; private String[] mWifiRegexs; /** @@ -144,111 +119,89 @@ public class WifiService extends IWifiManager.Stub { */ private static final long DEFAULT_IDLE_MILLIS = 15 * 60 * 1000; /* 15 minutes */ - private static final String WAKELOCK_TAG = "WifiService"; - /** - * The maximum amount of time to hold the wake lock after a disconnect - * caused by stopping the driver. Establishing an EDGE connection has been - * observed to take about 5 seconds under normal circumstances. This - * provides a bit of extra margin. - * <p> - * See {@link android.provider.Settings.Secure#WIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS}. - * This is the default value if a Settings.Secure value is not present. + * Number of allowed radio frequency channels in various regulatory domains. + * This list is sufficient for 802.11b/g networks (2.4GHz range). */ - private static final int DEFAULT_WAKELOCK_TIMEOUT = 8000; + private static int[] sValidRegulatoryChannelCounts = new int[] {11, 13, 14}; - // Wake lock used by driver-stop operation - private static PowerManager.WakeLock sDriverStopWakeLock; - // Wake lock used by other operations - private static PowerManager.WakeLock sWakeLock; + private static final String ACTION_DEVICE_IDLE = + "com.android.server.WifiManager.action.DEVICE_IDLE"; - private static final int MESSAGE_ENABLE_WIFI = 0; - private static final int MESSAGE_DISABLE_WIFI = 1; - private static final int MESSAGE_STOP_WIFI = 2; - private static final int MESSAGE_START_WIFI = 3; - private static final int MESSAGE_RELEASE_WAKELOCK = 4; - private static final int MESSAGE_UPDATE_STATE = 5; - private static final int MESSAGE_START_ACCESS_POINT = 6; - private static final int MESSAGE_STOP_ACCESS_POINT = 7; - private static final int MESSAGE_SET_CHANNELS = 8; - private static final int MESSAGE_ENABLE_NETWORKS = 9; + private boolean mIsReceiverRegistered = false; - private final WifiHandler mWifiHandler; + NetworkInfo mNetworkInfo = new NetworkInfo(ConnectivityManager.TYPE_WIFI, 0, "WIFI", ""); - /* - * Cache of scan results objects (size is somewhat arbitrary) + // Variables relating to the 'available networks' notification + /** + * The icon to show in the 'available networks' notification. This will also + * be the ID of the Notification given to the NotificationManager. */ - private static final int SCAN_RESULT_CACHE_SIZE = 80; - private final LinkedHashMap<String, ScanResult> mScanResultCache; - - /* - * Character buffer used to parse scan results (optimization) + private static final int ICON_NETWORKS_AVAILABLE = + com.android.internal.R.drawable.stat_notify_wifi_in_range; + /** + * When a notification is shown, we wait this amount before possibly showing it again. */ - private static final int SCAN_RESULT_BUFFER_SIZE = 512; - private boolean mNeedReconfig; - - /* - * Last UID that asked to enable WIFI. + private final long NOTIFICATION_REPEAT_DELAY_MS; + /** + * Whether the user has set the setting to show the 'available networks' notification. */ - private int mLastEnableUid = Process.myUid(); - - /* - * Last UID that asked to enable WIFI AP. + private boolean mNotificationEnabled; + /** + * Observes the user setting to keep {@link #mNotificationEnabled} in sync. */ - private int mLastApEnableUid = Process.myUid(); - - + private NotificationEnabledSettingObserver mNotificationEnabledSettingObserver; /** - * Number of allowed radio frequency channels in various regulatory domains. - * This list is sufficient for 802.11b/g networks (2.4GHz range). + * The {@link System#currentTimeMillis()} must be at least this value for us + * to show the notification again. */ - private static int[] sValidRegulatoryChannelCounts = new int[] {11, 13, 14}; + private long mNotificationRepeatTime; + /** + * The Notification object given to the NotificationManager. + */ + private Notification mNotification; + /** + * Whether the notification is being shown, as set by us. That is, if the + * user cancels the notification, we will not receive the callback so this + * will still be true. We only guarantee if this is false, then the + * notification is not showing. + */ + private boolean mNotificationShown; + /** + * The number of continuous scans that must occur before consider the + * supplicant in a scanning state. This allows supplicant to associate with + * remembered networks that are in the scan results. + */ + private static final int NUM_SCANS_BEFORE_ACTUALLY_SCANNING = 3; + /** + * The number of scans since the last network state change. When this + * exceeds {@link #NUM_SCANS_BEFORE_ACTUALLY_SCANNING}, we consider the + * supplicant to actually be scanning. When the network state changes to + * something other than scanning, we reset this to 0. + */ + private int mNumScansSinceNetworkStateChange; - private static final String ACTION_DEVICE_IDLE = - "com.android.server.WifiManager.action.DEVICE_IDLE"; - WifiService(Context context, WifiStateTracker tracker) { + WifiService(Context context) { mContext = context; - mWifiStateTracker = tracker; - mWifiStateTracker.enableRssiPolling(true); + mWifiStateMachine = new WifiStateMachine(mContext); + mWifiStateMachine.enableRssiPolling(true); mBatteryStats = BatteryStatsService.getService(); - IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE); - nwService = INetworkManagementService.Stub.asInterface(b); - - mScanResultCache = new LinkedHashMap<String, ScanResult>( - SCAN_RESULT_CACHE_SIZE, 0.75f, true) { - /* - * Limit the cache size by SCAN_RESULT_CACHE_SIZE - * elements - */ - public boolean removeEldestEntry(Map.Entry eldest) { - return SCAN_RESULT_CACHE_SIZE < this.size(); - } - }; - - HandlerThread wifiThread = new HandlerThread("WifiService"); - wifiThread.start(); - mWifiHandler = new WifiHandler(wifiThread.getLooper()); - - mWifiStateTracker.setWifiState(WIFI_STATE_DISABLED); - mWifiApState = WIFI_AP_STATE_DISABLED; - mAlarmManager = (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE); Intent idleIntent = new Intent(ACTION_DEVICE_IDLE, null); mIdleIntent = PendingIntent.getBroadcast(mContext, IDLE_REQUEST, idleIntent, 0); - PowerManager powerManager = (PowerManager)mContext.getSystemService(Context.POWER_SERVICE); - sWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, WAKELOCK_TAG); - sDriverStopWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, WAKELOCK_TAG); + HandlerThread wifiThread = new HandlerThread("WifiService"); + wifiThread.start(); mContext.registerReceiver( new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { // clear our flag indicating the user has overwridden airplane mode - mAirplaneModeOverwridden = false; + mAirplaneModeOverwridden.set(false); // on airplane disable, restore Wifi if the saved state indicates so if (!isAirplaneModeOn() && testAndClearWifiSavedState()) { persistWifiEnabled(true); @@ -263,14 +216,50 @@ public class WifiService extends IWifiManager.Stub { @Override public void onReceive(Context context, Intent intent) { - ArrayList<String> available = intent.getStringArrayListExtra( - ConnectivityManager.EXTRA_AVAILABLE_TETHER); - ArrayList<String> active = intent.getStringArrayListExtra( - ConnectivityManager.EXTRA_ACTIVE_TETHER); - updateTetherState(available, active); + ArrayList<String> available = intent.getStringArrayListExtra( + ConnectivityManager.EXTRA_AVAILABLE_TETHER); + ArrayList<String> active = intent.getStringArrayListExtra( + ConnectivityManager.EXTRA_ACTIVE_TETHER); + updateTetherState(available, active); } },new IntentFilter(ConnectivityManager.ACTION_TETHER_STATE_CHANGED)); + + IntentFilter filter = new IntentFilter(); + filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION); + filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION); + filter.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION); + + mContext.registerReceiver( + new BroadcastReceiver() { + @Override + public void onReceive(Context context, Intent intent) { + if (intent.getAction().equals(WifiManager.WIFI_STATE_CHANGED_ACTION)) { + // reset & clear notification on any wifi state change + resetNotification(); + } else if (intent.getAction().equals( + WifiManager.NETWORK_STATE_CHANGED_ACTION)) { + mNetworkInfo = (NetworkInfo) intent.getParcelableExtra( + WifiManager.EXTRA_NETWORK_INFO); + // reset & clear notification on a network connect & disconnect + switch(mNetworkInfo.getDetailedState()) { + case CONNECTED: + case DISCONNECTED: + resetNotification(); + break; + } + } else if (intent.getAction().equals( + WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)) { + checkAndSetNotification(); + } + } + }, filter); + + // Setting is in seconds + NOTIFICATION_REPEAT_DELAY_MS = Settings.Secure.getInt(context.getContentResolver(), + Settings.Secure.WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY, 900) * 1000l; + mNotificationEnabledSettingObserver = new NotificationEnabledSettingObserver(new Handler()); + mNotificationEnabledSettingObserver.register(); } /** @@ -279,7 +268,7 @@ public class WifiService extends IWifiManager.Stub { * * This function is used only at boot time */ - public void startWifi() { + public void checkAndStartWifi() { /* Start if Wi-Fi is enabled or the saved state indicates Wi-Fi was on */ boolean wifiEnabled = !isAirplaneModeOn() && (getPersistedWifiEnabled() || testAndClearWifiSavedState()); @@ -296,7 +285,10 @@ public class WifiService extends IWifiManager.Stub { IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE); INetworkManagementService service = INetworkManagementService.Stub.asInterface(b); - mCm = (ConnectivityManager)mContext.getSystemService(Context.CONNECTIVITY_SERVICE); + if (mCm == null) { + mCm = (ConnectivityManager)mContext.getSystemService(Context.CONNECTIVITY_SERVICE); + } + mWifiRegexs = mCm.getTetherableWifiRegexs(); for (String intf : available) { @@ -316,17 +308,14 @@ public class WifiService extends IWifiManager.Stub { } } catch (Exception e) { Slog.e(TAG, "Error configuring interface " + intf + ", :" + e); - try { - nwService.stopAccessPoint(); - } catch (Exception ee) { - Slog.e(TAG, "Could not stop AP, :" + ee); - } - setWifiApEnabledState(WIFI_AP_STATE_FAILED, 0, DriverAction.DRIVER_UNLOAD); + setWifiApEnabled(null, false); return; } if(mCm.tether(intf) != ConnectivityManager.TETHER_ERROR_NO_ERROR) { - Slog.e(TAG, "Error tethering "+intf); + Slog.e(TAG, "Error tethering on " + intf); + setWifiApEnabled(null, false); + return; } break; } @@ -362,39 +351,38 @@ public class WifiService extends IWifiManager.Stub { Settings.Secure.putInt(cr, Settings.Secure.WIFI_ON, enabled ? 1 : 0); } - NetworkStateTracker getNetworkStateTracker() { - return mWifiStateTracker; - } - /** * see {@link android.net.wifi.WifiManager#pingSupplicant()} - * @return {@code true} if the operation succeeds + * @return {@code true} if the operation succeeds, {@code false} otherwise */ public boolean pingSupplicant() { - enforceChangePermission(); - - return mWifiStateTracker.ping(); + enforceAccessPermission(); + return mWifiStateMachine.syncPingSupplicant(); } /** * see {@link android.net.wifi.WifiManager#startScan()} - * @return {@code true} if the operation succeeds */ - public boolean startScan(boolean forceActive) { + public void startScan(boolean forceActive) { enforceChangePermission(); + mWifiStateMachine.startScan(forceActive); + } + + private void enforceAccessPermission() { + mContext.enforceCallingOrSelfPermission(android.Manifest.permission.ACCESS_WIFI_STATE, + "WifiService"); + } + + private void enforceChangePermission() { + mContext.enforceCallingOrSelfPermission(android.Manifest.permission.CHANGE_WIFI_STATE, + "WifiService"); - switch (mWifiStateTracker.getSupplicantState()) { - case DISCONNECTED: - case INACTIVE: - case SCANNING: - case DORMANT: - break; - default: - mWifiStateTracker.setScanResultHandling( - WifiStateTracker.SUPPL_SCAN_HANDLING_LIST_ONLY); - break; - } - return mWifiStateTracker.scan(forceActive); + } + + private void enforceMulticastChangePermission() { + mContext.enforceCallingOrSelfPermission( + android.Manifest.permission.CHANGE_WIFI_MULTICAST_STATE, + "WifiService"); } /** @@ -403,168 +391,41 @@ public class WifiService extends IWifiManager.Stub { * @return {@code true} if the enable/disable operation was * started or is already in the queue. */ - public boolean setWifiEnabled(boolean enable) { + public synchronized boolean setWifiEnabled(boolean enable) { enforceChangePermission(); - if (mWifiHandler == null) return false; - synchronized (mWifiHandler) { - // caller may not have WAKE_LOCK permission - it's not required here - long ident = Binder.clearCallingIdentity(); - sWakeLock.acquire(); - Binder.restoreCallingIdentity(ident); - - mLastEnableUid = Binder.getCallingUid(); - // set a flag if the user is enabling Wifi while in airplane mode - mAirplaneModeOverwridden = (enable && isAirplaneModeOn() && isAirplaneToggleable()); - sendEnableMessage(enable, true, Binder.getCallingUid()); + if (DBG) { + Slog.e(TAG, "Invoking mWifiStateMachine.setWifiEnabled\n"); } - return true; - } - - /** - * Enables/disables Wi-Fi synchronously. - * @param enable {@code true} to turn Wi-Fi on, {@code false} to turn it off. - * @param persist {@code true} if the setting should be persisted. - * @param uid The UID of the process making the request. - * @return {@code true} if the operation succeeds (or if the existing state - * is the same as the requested state) - */ - private boolean setWifiEnabledBlocking(boolean enable, boolean persist, int uid) { - final int eventualWifiState = enable ? WIFI_STATE_ENABLED : WIFI_STATE_DISABLED; - final int wifiState = mWifiStateTracker.getWifiState(); - - if (wifiState == eventualWifiState) { - return true; - } - if (enable && isAirplaneModeOn() && !mAirplaneModeOverwridden) { - return false; + // set a flag if the user is enabling Wifi while in airplane mode + if (enable && isAirplaneModeOn() && isAirplaneToggleable()) { + mAirplaneModeOverwridden.set(true); } - /** - * Multiple calls to unregisterReceiver() cause exception and a system crash. - * This can happen if a supplicant is lost (or firmware crash occurs) and user indicates - * disable wifi at the same time. - * Avoid doing a disable when the current Wifi state is UNKNOWN - * TODO: Handle driver load fail and supplicant lost as seperate states - */ - if ((wifiState == WIFI_STATE_UNKNOWN) && !enable) { - return false; - } + mWifiStateMachine.setWifiEnabled(enable); - /** - * Fail Wifi if AP is enabled - * TODO: Deprecate WIFI_STATE_UNKNOWN and rename it - * WIFI_STATE_FAILED + /* + * Caller might not have WRITE_SECURE_SETTINGS, + * only CHANGE_WIFI_STATE is enforced */ - if ((mWifiApState == WIFI_AP_STATE_ENABLED) && enable) { - setWifiEnabledState(WIFI_STATE_UNKNOWN, uid); - return false; - } - - setWifiEnabledState(enable ? WIFI_STATE_ENABLING : WIFI_STATE_DISABLING, uid); + long ident = Binder.clearCallingIdentity(); + persistWifiEnabled(enable); + Binder.restoreCallingIdentity(ident); if (enable) { - if (!mWifiStateTracker.loadDriver()) { - Slog.e(TAG, "Failed to load Wi-Fi driver."); - setWifiEnabledState(WIFI_STATE_UNKNOWN, uid); - return false; - } - if (!mWifiStateTracker.startSupplicant()) { - mWifiStateTracker.unloadDriver(); - Slog.e(TAG, "Failed to start supplicant daemon."); - setWifiEnabledState(WIFI_STATE_UNKNOWN, uid); - return false; + if (!mIsReceiverRegistered) { + registerForBroadcasts(); + mIsReceiverRegistered = true; } - - registerForBroadcasts(); - mWifiStateTracker.startEventLoop(); - - } else { - + } else if (mIsReceiverRegistered){ mContext.unregisterReceiver(mReceiver); - // Remove notification (it will no-op if it isn't visible) - mWifiStateTracker.setNotificationVisible(false, 0, false, 0); - - boolean failedToStopSupplicantOrUnloadDriver = false; - - if (!mWifiStateTracker.stopSupplicant()) { - Slog.e(TAG, "Failed to stop supplicant daemon."); - setWifiEnabledState(WIFI_STATE_UNKNOWN, uid); - failedToStopSupplicantOrUnloadDriver = true; - } - - /** - * Reset connections and disable interface - * before we unload the driver - */ - mWifiStateTracker.resetConnections(true); - - if (!mWifiStateTracker.unloadDriver()) { - Slog.e(TAG, "Failed to unload Wi-Fi driver."); - if (!failedToStopSupplicantOrUnloadDriver) { - setWifiEnabledState(WIFI_STATE_UNKNOWN, uid); - failedToStopSupplicantOrUnloadDriver = true; - } - } - - if (failedToStopSupplicantOrUnloadDriver) { - return false; - } + mIsReceiverRegistered = false; } - // Success! - - if (persist) { - persistWifiEnabled(enable); - } - setWifiEnabledState(eventualWifiState, uid); return true; } - private void setWifiEnabledState(int wifiState, int uid) { - final int previousWifiState = mWifiStateTracker.getWifiState(); - - long ident = Binder.clearCallingIdentity(); - try { - if (wifiState == WIFI_STATE_ENABLED) { - mBatteryStats.noteWifiOn(uid); - } else if (wifiState == WIFI_STATE_DISABLED) { - mBatteryStats.noteWifiOff(uid); - } - } catch (RemoteException e) { - } finally { - Binder.restoreCallingIdentity(ident); - } - - // Update state - mWifiStateTracker.setWifiState(wifiState); - - // Broadcast - final Intent intent = new Intent(WifiManager.WIFI_STATE_CHANGED_ACTION); - intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); - intent.putExtra(WifiManager.EXTRA_WIFI_STATE, wifiState); - intent.putExtra(WifiManager.EXTRA_PREVIOUS_WIFI_STATE, previousWifiState); - mContext.sendStickyBroadcast(intent); - } - - 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"); - } - /** * see {@link WifiManager#getWifiState()} * @return One of {@link WifiManager#WIFI_STATE_DISABLED}, @@ -575,66 +436,59 @@ public class WifiService extends IWifiManager.Stub { */ public int getWifiEnabledState() { enforceAccessPermission(); - return mWifiStateTracker.getWifiState(); - } - - /** - * see {@link android.net.wifi.WifiManager#disconnect()} - * @return {@code true} if the operation succeeds - */ - public boolean disconnect() { - enforceChangePermission(); - - return mWifiStateTracker.disconnect(); - } - - /** - * see {@link android.net.wifi.WifiManager#reconnect()} - * @return {@code true} if the operation succeeds - */ - public boolean reconnect() { - enforceChangePermission(); - - return mWifiStateTracker.reconnectCommand(); - } - - /** - * see {@link android.net.wifi.WifiManager#reassociate()} - * @return {@code true} if the operation succeeds - */ - public boolean reassociate() { - enforceChangePermission(); - - return mWifiStateTracker.reassociate(); + 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 + * @param enabled true to enable and false to disable * @return {@code true} if the start operation was * started or is already in the queue. */ - public boolean setWifiApEnabled(WifiConfiguration wifiConfig, boolean enabled) { + public synchronized boolean setWifiApEnabled(WifiConfiguration wifiConfig, boolean enabled) { enforceChangePermission(); - if (mWifiHandler == null) return false; - - synchronized (mWifiHandler) { + if (enabled) { + /* Use default config if there is no existing config */ + if (wifiConfig == null && ((wifiConfig = getWifiApConfiguration()) == null)) { + wifiConfig = new WifiConfiguration(); + wifiConfig.SSID = mContext.getString(R.string.wifi_tether_configure_ssid_default); + wifiConfig.allowedKeyManagement.set(KeyMgmt.NONE); + } + /* + * Caller might not have WRITE_SECURE_SETTINGS, + * only CHANGE_WIFI_STATE is enforced + */ long ident = Binder.clearCallingIdentity(); - sWakeLock.acquire(); + setWifiApConfiguration(wifiConfig); Binder.restoreCallingIdentity(ident); - - mLastApEnableUid = Binder.getCallingUid(); - sendAccessPointMessage(enabled, wifiConfig, Binder.getCallingUid()); } + mWifiStateMachine.setWifiApEnabled(wifiConfig, enabled); + return true; } - public WifiConfiguration getWifiApConfiguration() { + /** + * 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 synchronized WifiConfiguration getWifiApConfiguration() { final ContentResolver cr = mContext.getContentResolver(); WifiConfiguration wifiConfig = new WifiConfiguration(); int authType; @@ -652,7 +506,11 @@ public class WifiService extends IWifiManager.Stub { } } - public void setWifiApConfiguration(WifiConfiguration wifiConfig) { + /** + * see {@link WifiManager#setWifiApConfiguration(WifiConfiguration)} + * @param wifiConfig WifiConfiguration details for soft access point + */ + public synchronized void setWifiApConfiguration(WifiConfiguration wifiConfig) { enforceChangePermission(); final ContentResolver cr = mContext.getContentResolver(); boolean isWpa; @@ -668,143 +526,27 @@ public class WifiService extends IWifiManager.Stub { } /** - * Enables/disables Wi-Fi AP synchronously. The driver is loaded - * and soft access point configured as a single operation. - * @param enable {@code true} to turn Wi-Fi on, {@code false} to turn it off. - * @param uid The UID of the process making the request. - * @param wifiConfig The WifiConfiguration for AP - * @return {@code true} if the operation succeeds (or if the existing state - * is the same as the requested state) + * see {@link android.net.wifi.WifiManager#disconnect()} */ - private boolean setWifiApEnabledBlocking(boolean enable, - int uid, WifiConfiguration wifiConfig) { - final int eventualWifiApState = enable ? WIFI_AP_STATE_ENABLED : WIFI_AP_STATE_DISABLED; - - if (mWifiApState == eventualWifiApState) { - /* Configuration changed on a running access point */ - if(enable && (wifiConfig != null)) { - try { - nwService.setAccessPoint(wifiConfig, mWifiStateTracker.getInterfaceName(), - SOFTAP_IFACE); - setWifiApConfiguration(wifiConfig); - return true; - } catch(Exception e) { - Slog.e(TAG, "Exception in nwService during AP restart"); - try { - nwService.stopAccessPoint(); - } catch (Exception ee) { - Slog.e(TAG, "Could not stop AP, :" + ee); - } - setWifiApEnabledState(WIFI_AP_STATE_FAILED, uid, DriverAction.DRIVER_UNLOAD); - return false; - } - } else { - return true; - } - } - - /** - * Fail AP if Wifi is enabled - */ - if ((mWifiStateTracker.getWifiState() == WIFI_STATE_ENABLED) && enable) { - setWifiApEnabledState(WIFI_AP_STATE_FAILED, uid, DriverAction.NO_DRIVER_UNLOAD); - return false; - } - - setWifiApEnabledState(enable ? WIFI_AP_STATE_ENABLING : - WIFI_AP_STATE_DISABLING, uid, DriverAction.NO_DRIVER_UNLOAD); - - if (enable) { - - /* Use default config if there is no existing config */ - if (wifiConfig == null && ((wifiConfig = getWifiApConfiguration()) == null)) { - wifiConfig = new WifiConfiguration(); - wifiConfig.SSID = mContext.getString(R.string.wifi_tether_configure_ssid_default); - wifiConfig.allowedKeyManagement.set(KeyMgmt.NONE); - } - - if (!mWifiStateTracker.loadDriver()) { - Slog.e(TAG, "Failed to load Wi-Fi driver for AP mode"); - setWifiApEnabledState(WIFI_AP_STATE_FAILED, uid, DriverAction.NO_DRIVER_UNLOAD); - return false; - } - - try { - nwService.startAccessPoint(wifiConfig, mWifiStateTracker.getInterfaceName(), - SOFTAP_IFACE); - } catch(Exception e) { - Slog.e(TAG, "Exception in startAccessPoint()"); - setWifiApEnabledState(WIFI_AP_STATE_FAILED, uid, DriverAction.DRIVER_UNLOAD); - return false; - } - - setWifiApConfiguration(wifiConfig); - - } else { - - try { - nwService.stopAccessPoint(); - } catch(Exception e) { - Slog.e(TAG, "Exception in stopAccessPoint()"); - setWifiApEnabledState(WIFI_AP_STATE_FAILED, uid, DriverAction.DRIVER_UNLOAD); - return false; - } - - if (!mWifiStateTracker.unloadDriver()) { - Slog.e(TAG, "Failed to unload Wi-Fi driver for AP mode"); - setWifiApEnabledState(WIFI_AP_STATE_FAILED, uid, DriverAction.NO_DRIVER_UNLOAD); - return false; - } - } - - setWifiApEnabledState(eventualWifiApState, uid, DriverAction.NO_DRIVER_UNLOAD); - return true; + public void disconnect() { + enforceChangePermission(); + mWifiStateMachine.disconnectCommand(); } /** - * 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} + * see {@link android.net.wifi.WifiManager#reconnect()} */ - public int getWifiApEnabledState() { - enforceAccessPermission(); - return mWifiApState; + public void reconnect() { + enforceChangePermission(); + mWifiStateMachine.reconnectCommand(); } - private void setWifiApEnabledState(int wifiAPState, int uid, DriverAction flag) { - final int previousWifiApState = mWifiApState; - - /** - * Unload the driver if going to a failed state - */ - if ((mWifiApState == WIFI_AP_STATE_FAILED) && (flag == DriverAction.DRIVER_UNLOAD)) { - mWifiStateTracker.unloadDriver(); - } - - long ident = Binder.clearCallingIdentity(); - try { - if (wifiAPState == WIFI_AP_STATE_ENABLED) { - mBatteryStats.noteWifiOn(uid); - } else if (wifiAPState == WIFI_AP_STATE_DISABLED) { - mBatteryStats.noteWifiOff(uid); - } - } catch (RemoteException e) { - } finally { - Binder.restoreCallingIdentity(ident); - } - - // Update state - mWifiApState = wifiAPState; - - // Broadcast - final Intent intent = new Intent(WifiManager.WIFI_AP_STATE_CHANGED_ACTION); - intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); - intent.putExtra(WifiManager.EXTRA_WIFI_AP_STATE, wifiAPState); - intent.putExtra(WifiManager.EXTRA_PREVIOUS_WIFI_AP_STATE, previousWifiApState); - mContext.sendStickyBroadcast(intent); + /** + * see {@link android.net.wifi.WifiManager#reassociate()} + */ + public void reassociate() { + enforceChangePermission(); + mWifiStateMachine.reassociateCommand(); } /** @@ -813,217 +555,7 @@ public class WifiService extends IWifiManager.Stub { */ public List<WifiConfiguration> getConfiguredNetworks() { enforceAccessPermission(); - String listStr; - - /* - * We don't cache the list, because we want to allow - * for the possibility that the configuration file - * has been modified through some external means, - * such as the wpa_cli command line program. - */ - listStr = mWifiStateTracker.listNetworks(); - - List<WifiConfiguration> networks = - new ArrayList<WifiConfiguration>(); - if (listStr == null) - return networks; - - String[] lines = listStr.split("\n"); - // Skip the first line, which is a header - for (int i = 1; i < lines.length; i++) { - String[] result = lines[i].split("\t"); - // network-id | ssid | bssid | flags - WifiConfiguration config = new WifiConfiguration(); - try { - config.networkId = Integer.parseInt(result[0]); - } catch(NumberFormatException e) { - continue; - } - if (result.length > 3) { - if (result[3].indexOf("[CURRENT]") != -1) - config.status = WifiConfiguration.Status.CURRENT; - else if (result[3].indexOf("[DISABLED]") != -1) - config.status = WifiConfiguration.Status.DISABLED; - else - config.status = WifiConfiguration.Status.ENABLED; - } else { - config.status = WifiConfiguration.Status.ENABLED; - } - readNetworkVariables(config); - networks.add(config); - } - - return networks; - } - - /** - * Read the variables from the supplicant daemon that are needed to - * fill in the WifiConfiguration object. - * <p/> - * The caller must hold the synchronization monitor. - * @param config the {@link WifiConfiguration} object to be filled in. - */ - private void readNetworkVariables(WifiConfiguration config) { - - int netId = config.networkId; - if (netId < 0) - return; - - /* - * TODO: maybe should have a native method that takes an array of - * variable names and returns an array of values. But we'd still - * be doing a round trip to the supplicant daemon for each variable. - */ - String value; - - value = mWifiStateTracker.getNetworkVariable(netId, WifiConfiguration.ssidVarName); - if (!TextUtils.isEmpty(value)) { - config.SSID = value; - } else { - config.SSID = null; - } - - value = mWifiStateTracker.getNetworkVariable(netId, WifiConfiguration.bssidVarName); - if (!TextUtils.isEmpty(value)) { - config.BSSID = value; - } else { - config.BSSID = null; - } - - value = mWifiStateTracker.getNetworkVariable(netId, WifiConfiguration.priorityVarName); - config.priority = -1; - if (!TextUtils.isEmpty(value)) { - try { - config.priority = Integer.parseInt(value); - } catch (NumberFormatException ignore) { - } - } - - value = mWifiStateTracker.getNetworkVariable(netId, WifiConfiguration.hiddenSSIDVarName); - config.hiddenSSID = false; - if (!TextUtils.isEmpty(value)) { - try { - config.hiddenSSID = Integer.parseInt(value) != 0; - } catch (NumberFormatException ignore) { - } - } - - value = mWifiStateTracker.getNetworkVariable(netId, WifiConfiguration.wepTxKeyIdxVarName); - config.wepTxKeyIndex = -1; - if (!TextUtils.isEmpty(value)) { - try { - config.wepTxKeyIndex = Integer.parseInt(value); - } catch (NumberFormatException ignore) { - } - } - - /* - * Get up to 4 WEP keys. Note that the actual keys are not passed back, - * just a "*" if the key is set, or the null string otherwise. - */ - for (int i = 0; i < 4; i++) { - value = mWifiStateTracker.getNetworkVariable(netId, WifiConfiguration.wepKeyVarNames[i]); - if (!TextUtils.isEmpty(value)) { - config.wepKeys[i] = value; - } else { - config.wepKeys[i] = null; - } - } - - /* - * Get the private shared key. Note that the actual keys are not passed back, - * just a "*" if the key is set, or the null string otherwise. - */ - value = mWifiStateTracker.getNetworkVariable(netId, WifiConfiguration.pskVarName); - if (!TextUtils.isEmpty(value)) { - config.preSharedKey = value; - } else { - config.preSharedKey = null; - } - - value = mWifiStateTracker.getNetworkVariable(config.networkId, - WifiConfiguration.Protocol.varName); - if (!TextUtils.isEmpty(value)) { - String vals[] = value.split(" "); - for (String val : vals) { - int index = - lookupString(val, WifiConfiguration.Protocol.strings); - if (0 <= index) { - config.allowedProtocols.set(index); - } - } - } - - value = mWifiStateTracker.getNetworkVariable(config.networkId, - WifiConfiguration.KeyMgmt.varName); - if (!TextUtils.isEmpty(value)) { - String vals[] = value.split(" "); - for (String val : vals) { - int index = - lookupString(val, WifiConfiguration.KeyMgmt.strings); - if (0 <= index) { - config.allowedKeyManagement.set(index); - } - } - } - - value = mWifiStateTracker.getNetworkVariable(config.networkId, - WifiConfiguration.AuthAlgorithm.varName); - if (!TextUtils.isEmpty(value)) { - String vals[] = value.split(" "); - for (String val : vals) { - int index = - lookupString(val, WifiConfiguration.AuthAlgorithm.strings); - if (0 <= index) { - config.allowedAuthAlgorithms.set(index); - } - } - } - - value = mWifiStateTracker.getNetworkVariable(config.networkId, - WifiConfiguration.PairwiseCipher.varName); - if (!TextUtils.isEmpty(value)) { - String vals[] = value.split(" "); - for (String val : vals) { - int index = - lookupString(val, WifiConfiguration.PairwiseCipher.strings); - if (0 <= index) { - config.allowedPairwiseCiphers.set(index); - } - } - } - - value = mWifiStateTracker.getNetworkVariable(config.networkId, - WifiConfiguration.GroupCipher.varName); - if (!TextUtils.isEmpty(value)) { - String vals[] = value.split(" "); - for (String val : vals) { - int index = - lookupString(val, WifiConfiguration.GroupCipher.strings); - if (0 <= index) { - config.allowedGroupCiphers.set(index); - } - } - } - - for (WifiConfiguration.EnterpriseField field : - config.enterpriseFields) { - value = mWifiStateTracker.getNetworkVariable(netId, - field.varName()); - if (!TextUtils.isEmpty(value)) { - if (field != config.eap) value = removeDoubleQuotes(value); - field.setValue(value); - } - } - } - - private static String removeDoubleQuotes(String string) { - if (string.length() <= 2) return ""; - return string.substring(1, string.length() - 1); - } - - private static String convertToQuotedString(String string) { - return "\"" + string + "\""; + return mWifiStateMachine.syncGetConfiguredNetworks(); } /** @@ -1033,280 +565,10 @@ public class WifiService extends IWifiManager.Stub { */ public int addOrUpdateNetwork(WifiConfiguration config) { enforceChangePermission(); - - /* - * If the supplied networkId is -1, we create a new empty - * network configuration. Otherwise, the networkId should - * refer to an existing configuration. - */ - int netId = config.networkId; - boolean newNetwork = netId == -1; - boolean doReconfig = false; - // networkId of -1 means we want to create a new network - synchronized (mWifiStateTracker) { - if (newNetwork) { - netId = mWifiStateTracker.addNetwork(); - if (netId < 0) { - if (DBG) { - Slog.d(TAG, "Failed to add a network!"); - } - return -1; - } - doReconfig = true; - } - mNeedReconfig = mNeedReconfig || doReconfig; - } - - setVariables: { - /* - * Note that if a networkId for a non-existent network - * was supplied, then the first setNetworkVariable() - * will fail, so we don't bother to make a separate check - * for the validity of the ID up front. - */ - if (config.SSID != null && - !mWifiStateTracker.setNetworkVariable( - netId, - WifiConfiguration.ssidVarName, - config.SSID)) { - if (DBG) { - Slog.d(TAG, "failed to set SSID: "+config.SSID); - } - break setVariables; - } - - if (config.BSSID != null && - !mWifiStateTracker.setNetworkVariable( - netId, - WifiConfiguration.bssidVarName, - config.BSSID)) { - if (DBG) { - Slog.d(TAG, "failed to set BSSID: "+config.BSSID); - } - break setVariables; - } - - String allowedKeyManagementString = - makeString(config.allowedKeyManagement, WifiConfiguration.KeyMgmt.strings); - if (config.allowedKeyManagement.cardinality() != 0 && - !mWifiStateTracker.setNetworkVariable( - netId, - WifiConfiguration.KeyMgmt.varName, - allowedKeyManagementString)) { - if (DBG) { - Slog.d(TAG, "failed to set key_mgmt: "+ - allowedKeyManagementString); - } - break setVariables; - } - - String allowedProtocolsString = - makeString(config.allowedProtocols, WifiConfiguration.Protocol.strings); - if (config.allowedProtocols.cardinality() != 0 && - !mWifiStateTracker.setNetworkVariable( - netId, - WifiConfiguration.Protocol.varName, - allowedProtocolsString)) { - if (DBG) { - Slog.d(TAG, "failed to set proto: "+ - allowedProtocolsString); - } - break setVariables; - } - - String allowedAuthAlgorithmsString = - makeString(config.allowedAuthAlgorithms, WifiConfiguration.AuthAlgorithm.strings); - if (config.allowedAuthAlgorithms.cardinality() != 0 && - !mWifiStateTracker.setNetworkVariable( - netId, - WifiConfiguration.AuthAlgorithm.varName, - allowedAuthAlgorithmsString)) { - if (DBG) { - Slog.d(TAG, "failed to set auth_alg: "+ - allowedAuthAlgorithmsString); - } - break setVariables; - } - - String allowedPairwiseCiphersString = - makeString(config.allowedPairwiseCiphers, WifiConfiguration.PairwiseCipher.strings); - if (config.allowedPairwiseCiphers.cardinality() != 0 && - !mWifiStateTracker.setNetworkVariable( - netId, - WifiConfiguration.PairwiseCipher.varName, - allowedPairwiseCiphersString)) { - if (DBG) { - Slog.d(TAG, "failed to set pairwise: "+ - allowedPairwiseCiphersString); - } - break setVariables; - } - - String allowedGroupCiphersString = - makeString(config.allowedGroupCiphers, WifiConfiguration.GroupCipher.strings); - if (config.allowedGroupCiphers.cardinality() != 0 && - !mWifiStateTracker.setNetworkVariable( - netId, - WifiConfiguration.GroupCipher.varName, - allowedGroupCiphersString)) { - if (DBG) { - Slog.d(TAG, "failed to set group: "+ - allowedGroupCiphersString); - } - break setVariables; - } - - // Prevent client screw-up by passing in a WifiConfiguration we gave it - // by preventing "*" as a key. - if (config.preSharedKey != null && !config.preSharedKey.equals("*") && - !mWifiStateTracker.setNetworkVariable( - netId, - WifiConfiguration.pskVarName, - config.preSharedKey)) { - if (DBG) { - Slog.d(TAG, "failed to set psk: "+config.preSharedKey); - } - break setVariables; - } - - boolean hasSetKey = false; - if (config.wepKeys != null) { - for (int i = 0; i < config.wepKeys.length; i++) { - // Prevent client screw-up by passing in a WifiConfiguration we gave it - // by preventing "*" as a key. - if (config.wepKeys[i] != null && !config.wepKeys[i].equals("*")) { - if (!mWifiStateTracker.setNetworkVariable( - netId, - WifiConfiguration.wepKeyVarNames[i], - config.wepKeys[i])) { - if (DBG) { - Slog.d(TAG, - "failed to set wep_key"+i+": " + - config.wepKeys[i]); - } - break setVariables; - } - hasSetKey = true; - } - } - } - - if (hasSetKey) { - if (!mWifiStateTracker.setNetworkVariable( - netId, - WifiConfiguration.wepTxKeyIdxVarName, - Integer.toString(config.wepTxKeyIndex))) { - if (DBG) { - Slog.d(TAG, - "failed to set wep_tx_keyidx: "+ - config.wepTxKeyIndex); - } - break setVariables; - } - } - - if (!mWifiStateTracker.setNetworkVariable( - netId, - WifiConfiguration.priorityVarName, - Integer.toString(config.priority))) { - if (DBG) { - Slog.d(TAG, config.SSID + ": failed to set priority: " - +config.priority); - } - break setVariables; - } - - if (config.hiddenSSID && !mWifiStateTracker.setNetworkVariable( - netId, - WifiConfiguration.hiddenSSIDVarName, - Integer.toString(config.hiddenSSID ? 1 : 0))) { - if (DBG) { - Slog.d(TAG, config.SSID + ": failed to set hiddenSSID: "+ - config.hiddenSSID); - } - break setVariables; - } - - for (WifiConfiguration.EnterpriseField field - : config.enterpriseFields) { - String varName = field.varName(); - String value = field.value(); - if (value != null) { - if (field != config.eap) { - value = (value.length() == 0) ? "NULL" : convertToQuotedString(value); - } - if (!mWifiStateTracker.setNetworkVariable( - netId, - varName, - value)) { - if (DBG) { - Slog.d(TAG, config.SSID + ": failed to set " + varName + - ": " + value); - } - break setVariables; - } - } - } - return netId; - } - - /* - * For an update, if one of the setNetworkVariable operations fails, - * we might want to roll back all the changes already made. But the - * chances are that if anything is going to go wrong, it'll happen - * the first time we try to set one of the variables. - */ - if (newNetwork) { - removeNetwork(netId); - if (DBG) { - Slog.d(TAG, - "Failed to set a network variable, removed network: " - + netId); - } - } - return -1; + return mWifiStateMachine.syncAddOrUpdateNetwork(config); } - private static String makeString(BitSet set, String[] strings) { - StringBuffer buf = new StringBuffer(); - int nextSetBit = -1; - - /* Make sure all set bits are in [0, strings.length) to avoid - * going out of bounds on strings. (Shouldn't happen, but...) */ - set = set.get(0, strings.length); - - while ((nextSetBit = set.nextSetBit(nextSetBit + 1)) != -1) { - buf.append(strings[nextSetBit].replace('_', '-')).append(' '); - } - - // remove trailing space - if (set.cardinality() > 0) { - buf.setLength(buf.length() - 1); - } - - return buf.toString(); - } - - private static int lookupString(String string, String[] strings) { - int size = strings.length; - - string = string.replace('-', '_'); - - for (int i = 0; i < size; i++) - if (string.equals(strings[i])) - return i; - - if (DBG) { - // if we ever get here, we should probably add the - // value to WifiConfiguration to reflect that it's - // supported by the WPA supplicant - Slog.w(TAG, "Failed to look-up a string: " + string); - } - - return -1; - } - - /** + /** * See {@link android.net.wifi.WifiManager#removeNetwork(int)} * @param netId the integer that identifies the network configuration * to the supplicant @@ -1314,8 +576,7 @@ public class WifiService extends IWifiManager.Stub { */ public boolean removeNetwork(int netId) { enforceChangePermission(); - - return mWifiStateTracker.removeNetwork(netId); + return mWifiStateMachine.syncRemoveNetwork(netId); } /** @@ -1327,14 +588,7 @@ public class WifiService extends IWifiManager.Stub { */ public boolean enableNetwork(int netId, boolean disableOthers) { enforceChangePermission(); - - String ifname = mWifiStateTracker.getInterfaceName(); - NetworkUtils.enableInterface(ifname); - boolean result = mWifiStateTracker.enableNetwork(netId, disableOthers); - if (!result) { - NetworkUtils.disableInterface(ifname); - } - return result; + return mWifiStateMachine.syncEnableNetwork(netId, disableOthers); } /** @@ -1345,8 +599,7 @@ public class WifiService extends IWifiManager.Stub { */ public boolean disableNetwork(int netId) { enforceChangePermission(); - - return mWifiStateTracker.disableNetwork(netId); + return mWifiStateMachine.syncDisableNetwork(netId); } /** @@ -1359,7 +612,7 @@ public class WifiService extends IWifiManager.Stub { * Make sure we have the latest information, by sending * a status request to the supplicant. */ - return mWifiStateTracker.requestConnectionInfo(); + return mWifiStateMachine.syncRequestConnectionInfo(); } /** @@ -1369,180 +622,19 @@ public class WifiService extends IWifiManager.Stub { */ public List<ScanResult> getScanResults() { enforceAccessPermission(); - String reply; - - reply = mWifiStateTracker.scanResults(); - if (reply == null) { - return null; - } - - List<ScanResult> scanList = new ArrayList<ScanResult>(); - - int lineCount = 0; - - int replyLen = reply.length(); - // Parse the result string, keeping in mind that the last line does - // not end with a newline. - for (int lineBeg = 0, lineEnd = 0; lineEnd <= replyLen; ++lineEnd) { - if (lineEnd == replyLen || reply.charAt(lineEnd) == '\n') { - ++lineCount; - /* - * Skip the first line, which is a header - */ - if (lineCount == 1) { - lineBeg = lineEnd + 1; - continue; - } - if (lineEnd > lineBeg) { - String line = reply.substring(lineBeg, lineEnd); - ScanResult scanResult = parseScanResult(line); - if (scanResult != null) { - scanList.add(scanResult); - } else if (DBG) { - Slog.w(TAG, "misformatted scan result for: " + line); - } - } - lineBeg = lineEnd + 1; - } - } - mWifiStateTracker.setScanResultsList(scanList); - return scanList; - } - - /** - * Parse the scan result line passed to us by wpa_supplicant (helper). - * @param line the line to parse - * @return the {@link ScanResult} object - */ - private ScanResult parseScanResult(String line) { - ScanResult scanResult = null; - if (line != null) { - /* - * Cache implementation (LinkedHashMap) is not synchronized, thus, - * must synchronized here! - */ - synchronized (mScanResultCache) { - String[] result = scanResultPattern.split(line); - if (3 <= result.length && result.length <= 5) { - String bssid = result[0]; - // bssid | frequency | level | flags | ssid - int frequency; - int level; - try { - frequency = Integer.parseInt(result[1]); - level = Integer.parseInt(result[2]); - /* some implementations avoid negative values by adding 256 - * so we need to adjust for that here. - */ - if (level > 0) level -= 256; - } catch (NumberFormatException e) { - frequency = 0; - level = 0; - } - - /* - * The formatting of the results returned by - * wpa_supplicant is intended to make the fields - * line up nicely when printed, - * not to make them easy to parse. So we have to - * apply some heuristics to figure out which field - * is the SSID and which field is the flags. - */ - String ssid; - String flags; - if (result.length == 4) { - if (result[3].charAt(0) == '[') { - flags = result[3]; - ssid = ""; - } else { - flags = ""; - ssid = result[3]; - } - } else if (result.length == 5) { - flags = result[3]; - ssid = result[4]; - } else { - // Here, we must have 3 fields: no flags and ssid - // set - flags = ""; - ssid = ""; - } - - // bssid + ssid is the hash key - String key = bssid + ssid; - scanResult = mScanResultCache.get(key); - if (scanResult != null) { - scanResult.level = level; - scanResult.SSID = ssid; - scanResult.capabilities = flags; - scanResult.frequency = frequency; - } else { - // Do not add scan results that have no SSID set - if (0 < ssid.trim().length()) { - scanResult = - new ScanResult( - ssid, bssid, flags, level, frequency); - mScanResultCache.put(key, scanResult); - } - } - } else { - Slog.w(TAG, "Misformatted scan result text with " + - result.length + " fields: " + line); - } - } - } - - return scanResult; - } - - /** - * Parse the "flags" field passed back in a scan result by wpa_supplicant, - * and construct a {@code WifiConfiguration} that describes the encryption, - * key management, and authenticaion capabilities of the access point. - * @param flags the string returned by wpa_supplicant - * @return the {@link WifiConfiguration} object, filled in - */ - WifiConfiguration parseScanFlags(String flags) { - WifiConfiguration config = new WifiConfiguration(); - - if (flags.length() == 0) { - config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE); - } - // ... to be implemented - return config; + return mWifiStateMachine.syncGetScanResultsList(); } /** * 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; + boolean result = true; enforceChangePermission(); - - synchronized (mWifiStateTracker) { - result = mWifiStateTracker.saveConfig(); - if (result && mNeedReconfig) { - mNeedReconfig = false; - result = mWifiStateTracker.reloadConfig(); - - if (result) { - Intent intent = new Intent(WifiManager.NETWORK_IDS_CHANGED_ACTION); - mContext.sendBroadcast(intent); - } - } - } - // Inform the backup manager about a data change - IBackupManager ibm = IBackupManager.Stub.asInterface( - ServiceManager.getService(Context.BACKUP_SERVICE)); - if (ibm != null) { - try { - ibm.dataChanged("com.android.providers.settings"); - } catch (Exception e) { - // Try again later - } - } - return result; + return mWifiStateMachine.syncSaveConfig(); } /** @@ -1557,7 +649,7 @@ public class WifiService extends IWifiManager.Stub { * @return {@code true} if the operation succeeds, {@code false} otherwise, e.g., * {@code numChannels} is outside the valid range. */ - public boolean setNumAllowedChannels(int numChannels, boolean persist) { + public synchronized boolean setNumAllowedChannels(int numChannels, boolean persist) { Slog.i(TAG, "WifiService trying to setNumAllowed to "+numChannels+ " with persist set to "+persist); enforceChangePermission(); @@ -1579,28 +671,15 @@ public class WifiService extends IWifiManager.Stub { return false; } - if (mWifiHandler == null) return false; - - Message.obtain(mWifiHandler, - MESSAGE_SET_CHANNELS, numChannels, (persist ? 1 : 0)).sendToTarget(); - - return true; - } - - /** - * sets the number of allowed radio frequency channels synchronously - * @param numChannels the number of allowed channels. Must be greater than 0 - * and less than or equal to 16. - * @param persist {@code true} if the setting should be remembered. - * @return {@code true} if the operation succeeds, {@code false} otherwise - */ - private boolean setNumAllowedChannelsBlocking(int numChannels, boolean persist) { if (persist) { Settings.Secure.putInt(mContext.getContentResolver(), Settings.Secure.WIFI_NUM_ALLOWED_CHANNELS, numChannels); } - return mWifiStateTracker.setNumAllowedChannels(numChannels); + + mWifiStateMachine.setNumAllowedChannels(numChannels); + + return true; } /** @@ -1618,7 +697,7 @@ public class WifiService extends IWifiManager.Stub { * Wi-Fi is not currently enabled), get the value from * Settings. */ - numChannels = mWifiStateTracker.getNumAllowedChannels(); + numChannels = mWifiStateMachine.getNumAllowedChannels(); if (numChannels < 0) { numChannels = Settings.Secure.getInt(mContext.getContentResolver(), Settings.Secure.WIFI_NUM_ALLOWED_CHANNELS, @@ -1644,7 +723,76 @@ public class WifiService extends IWifiManager.Stub { */ public DhcpInfo getDhcpInfo() { enforceAccessPermission(); - return mWifiStateTracker.getDhcpInfo(); + return mWifiStateMachine.syncGetDhcpInfo(); + } + + /** + * see {@link android.net.wifi.WifiManager#startWifi} + * + */ + public void startWifi() { + enforceChangePermission(); + /* 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); + mWifiStateMachine.reconnectCommand(); + } + + /** + * see {@link android.net.wifi.WifiManager#stopWifi} + * + */ + public void stopWifi() { + enforceChangePermission(); + /* TODO: may be add permissions for access only to connectivity service + * TODO: if a stop is issued, wifi is brought up only by startWifi + * unless wifi enabled status is toggled + */ + mWifiStateMachine.setDriverStart(false); + } + + + /** + * 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(); + } + + public void connectNetworkWithId(int networkId) { + enforceChangePermission(); + mWifiStateMachine.connectNetwork(networkId); + } + + public void connectNetworkWithConfig(WifiConfiguration config) { + enforceChangePermission(); + mWifiStateMachine.connectNetwork(config); + } + + public void saveNetwork(WifiConfiguration config) { + enforceChangePermission(); + mWifiStateMachine.saveNetwork(config); + } + + public void forgetNetwork(int netId) { + enforceChangePermission(); + mWifiStateMachine.forgetNetwork(netId); } private final BroadcastReceiver mReceiver = new BroadcastReceiver() { @@ -1663,17 +811,11 @@ public class WifiService extends IWifiManager.Stub { mAlarmManager.cancel(mIdleIntent); mDeviceIdle = false; mScreenOff = false; - mWifiStateTracker.enableRssiPolling(true); - /* DHCP or other temporary failures in the past can prevent - * a disabled network from being connected to, enable on screen on - */ - if (mWifiStateTracker.isAnyNetworkDisabled()) { - sendEnableNetworksMessage(); - } + mWifiStateMachine.enableRssiPolling(true); } else if (action.equals(Intent.ACTION_SCREEN_OFF)) { Slog.d(TAG, "ACTION_SCREEN_OFF"); mScreenOff = true; - mWifiStateTracker.enableRssiPolling(false); + mWifiStateMachine.enableRssiPolling(false); /* * 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 @@ -1681,11 +823,11 @@ public class WifiService extends IWifiManager.Stub { * or plugged in to AC). */ if (!shouldWifiStayAwake(stayAwakeConditions, mPluggedType)) { - WifiInfo info = mWifiStateTracker.requestConnectionInfo(); + WifiInfo info = mWifiStateMachine.syncRequestConnectionInfo(); if (info.getSupplicantState() != SupplicantState.COMPLETED) { // we used to go to sleep immediately, but this caused some race conditions - // we don't have time to track down for this release. Delay instead, but not - // as long as we would if connected (below) + // we don't have time to track down for this release. Delay instead, + // but not as long as we would if connected (below) // TODO - fix the race conditions and switch back to the immediate turn-off long triggerTime = System.currentTimeMillis() + (2*60*1000); // 2 min Slog.d(TAG, "setting ACTION_DEVICE_IDLE timer for 120,000 ms"); @@ -1732,7 +874,7 @@ public class WifiService extends IWifiManager.Stub { isBluetoothPlaying = true; } } - mWifiStateTracker.setBluetoothScanMode(isBluetoothPlaying); + mWifiStateMachine.setBluetoothScanMode(isBluetoothPlaying); } else { return; @@ -1784,85 +926,36 @@ public class WifiService extends IWifiManager.Stub { } }; - private void sendEnableMessage(boolean enable, boolean persist, int uid) { - Message msg = Message.obtain(mWifiHandler, - (enable ? MESSAGE_ENABLE_WIFI : MESSAGE_DISABLE_WIFI), - (persist ? 1 : 0), uid); - msg.sendToTarget(); - } - - private void sendStartMessage(int lockMode) { - Message.obtain(mWifiHandler, MESSAGE_START_WIFI, lockMode, 0).sendToTarget(); - } - - private void sendAccessPointMessage(boolean enable, WifiConfiguration wifiConfig, int uid) { - Message.obtain(mWifiHandler, - (enable ? MESSAGE_START_ACCESS_POINT : MESSAGE_STOP_ACCESS_POINT), - uid, 0, wifiConfig).sendToTarget(); - } - - private void sendEnableNetworksMessage() { - Message.obtain(mWifiHandler, MESSAGE_ENABLE_NETWORKS).sendToTarget(); - } - private void updateWifiState() { - // send a message so it's all serialized - Message.obtain(mWifiHandler, MESSAGE_UPDATE_STATE, 0, 0).sendToTarget(); - } - - private void doUpdateWifiState() { boolean wifiEnabled = getPersistedWifiEnabled(); - boolean airplaneMode = isAirplaneModeOn() && !mAirplaneModeOverwridden; + boolean airplaneMode = isAirplaneModeOn() && !mAirplaneModeOverwridden.get(); boolean lockHeld = mLocks.hasLocks(); - int strongestLockMode = WifiManager.WIFI_MODE_FULL; + int strongestLockMode; boolean wifiShouldBeEnabled = wifiEnabled && !airplaneMode; boolean wifiShouldBeStarted = !mDeviceIdle || lockHeld; - - if (lockHeld) { + if (mDeviceIdle && lockHeld) { strongestLockMode = mLocks.getStrongestLockMode(); - } - /* If device is not idle, lockmode cannot be scan only */ - if (!mDeviceIdle && strongestLockMode == WifiManager.WIFI_MODE_SCAN_ONLY) { + } else { strongestLockMode = WifiManager.WIFI_MODE_FULL; } - synchronized (mWifiHandler) { - if ((mWifiStateTracker.getWifiState() == WIFI_STATE_ENABLING) && !airplaneMode) { - return; - } - - /* Disable tethering when airplane mode is enabled */ - if (airplaneMode && - (mWifiApState == WIFI_AP_STATE_ENABLING || mWifiApState == WIFI_AP_STATE_ENABLED)) { - sWakeLock.acquire(); - sendAccessPointMessage(false, null, mLastApEnableUid); - } + /* Disable tethering when airplane mode is enabled */ + if (airplaneMode) { + mWifiStateMachine.setWifiApEnabled(null, false); + } - if (wifiShouldBeEnabled) { - if (wifiShouldBeStarted) { - sWakeLock.acquire(); - sendEnableMessage(true, false, mLastEnableUid); - sWakeLock.acquire(); - sendStartMessage(strongestLockMode); - } else if (!mWifiStateTracker.isDriverStopped()) { - int wakeLockTimeout = - Settings.Secure.getInt( - mContext.getContentResolver(), - Settings.Secure.WIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS, - DEFAULT_WAKELOCK_TIMEOUT); - /* - * We are assuming that ConnectivityService can make - * a transition to cellular data within wakeLockTimeout time. - * The wakelock is released by the delayed message. - */ - sDriverStopWakeLock.acquire(); - mWifiHandler.sendEmptyMessage(MESSAGE_STOP_WIFI); - mWifiHandler.sendEmptyMessageDelayed(MESSAGE_RELEASE_WAKELOCK, wakeLockTimeout); - } + if (wifiShouldBeEnabled) { + if (wifiShouldBeStarted) { + mWifiStateMachine.setWifiEnabled(true); + mWifiStateMachine.setScanOnlyMode( + strongestLockMode == WifiManager.WIFI_MODE_SCAN_ONLY); + mWifiStateMachine.setDriverStart(true); } else { - sWakeLock.acquire(); - sendEnableMessage(false, false, mLastEnableUid); + mWifiStateMachine.requestCmWakeLock(); + mWifiStateMachine.setDriverStart(false); } + } else { + mWifiStateMachine.setWifiEnabled(false); } } @@ -1900,81 +993,6 @@ public class WifiService extends IWifiManager.Stub { Settings.System.AIRPLANE_MODE_ON, 0) == 1; } - /** - * Handler that allows posting to the WifiThread. - */ - private class WifiHandler extends Handler { - public WifiHandler(Looper looper) { - super(looper); - } - - @Override - public void handleMessage(Message msg) { - switch (msg.what) { - - case MESSAGE_ENABLE_WIFI: - setWifiEnabledBlocking(true, msg.arg1 == 1, msg.arg2); - if (mWifiWatchdogService == null) { - mWifiWatchdogService = new WifiWatchdogService(mContext, mWifiStateTracker); - } - sWakeLock.release(); - break; - - case MESSAGE_START_WIFI: - mWifiStateTracker.setScanOnlyMode(msg.arg1 == WifiManager.WIFI_MODE_SCAN_ONLY); - mWifiStateTracker.restart(); - mWifiStateTracker.setHighPerfMode(msg.arg1 == - WifiManager.WIFI_MODE_FULL_HIGH_PERF); - sWakeLock.release(); - break; - - case MESSAGE_UPDATE_STATE: - doUpdateWifiState(); - break; - - case MESSAGE_DISABLE_WIFI: - // a non-zero msg.arg1 value means the "enabled" setting - // should be persisted - setWifiEnabledBlocking(false, msg.arg1 == 1, msg.arg2); - mWifiWatchdogService = null; - sWakeLock.release(); - break; - - case MESSAGE_STOP_WIFI: - mWifiStateTracker.disconnectAndStop(); - // don't release wakelock - break; - - case MESSAGE_RELEASE_WAKELOCK: - sDriverStopWakeLock.release(); - break; - - case MESSAGE_START_ACCESS_POINT: - setWifiApEnabledBlocking(true, - msg.arg1, - (WifiConfiguration) msg.obj); - sWakeLock.release(); - break; - - case MESSAGE_STOP_ACCESS_POINT: - setWifiApEnabledBlocking(false, - msg.arg1, - (WifiConfiguration) msg.obj); - sWakeLock.release(); - break; - - case MESSAGE_SET_CHANNELS: - setNumAllowedChannelsBlocking(msg.arg1, msg.arg2 == 1); - break; - - case MESSAGE_ENABLE_NETWORKS: - mWifiStateTracker.enableAllNetworks(getConfiguredNetworks()); - break; - - } - } - } - @Override protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) @@ -1984,17 +1002,17 @@ public class WifiService extends IWifiManager.Stub { + ", uid=" + Binder.getCallingUid()); return; } - pw.println("Wi-Fi is " + stateName(mWifiStateTracker.getWifiState())); + pw.println("Wi-Fi is " + mWifiStateMachine.syncGetWifiStateByName()); pw.println("Stay-awake conditions: " + Settings.System.getInt(mContext.getContentResolver(), Settings.System.STAY_ON_WHILE_PLUGGED_IN, 0)); pw.println(); pw.println("Internal state:"); - pw.println(mWifiStateTracker); + pw.println(mWifiStateMachine); pw.println(); pw.println("Latest scan results:"); - List<ScanResult> scanResults = mWifiStateTracker.getScanResultsList(); + List<ScanResult> scanResults = mWifiStateMachine.syncGetScanResultsList(); if (scanResults != null && scanResults.size() != 0) { pw.println(" BSSID Frequency RSSI Flags SSID"); for (ScanResult r : scanResults) { @@ -2008,33 +1026,14 @@ public class WifiService extends IWifiManager.Stub { } 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); } - private static String stateName(int wifiState) { - switch (wifiState) { - case WIFI_STATE_DISABLING: - return "disabling"; - case WIFI_STATE_DISABLED: - return "disabled"; - case WIFI_STATE_ENABLING: - return "enabling"; - case WIFI_STATE_ENABLED: - return "enabled"; - case WIFI_STATE_UNKNOWN: - return "unknown state"; - default: - return "[invalid state]"; - } - } - private class WifiLock extends DeathRecipient { WifiLock(int lockMode, String tag, IBinder binder) { super(lockMode, tag, binder); @@ -2066,15 +1065,11 @@ public class WifiService extends IWifiManager.Stub { 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; + for (WifiLock l : mList) { + if (l.mMode == WifiManager.WIFI_MODE_FULL) { + return WifiManager.WIFI_MODE_FULL; + } } - return WifiManager.WIFI_MODE_SCAN_ONLY; } @@ -2113,11 +1108,7 @@ public class WifiService extends IWifiManager.Stub { public boolean acquireWifiLock(IBinder binder, int lockMode, String tag) { 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); + if (lockMode != WifiManager.WIFI_MODE_FULL && lockMode != WifiManager.WIFI_MODE_SCAN_ONLY) { return false; } WifiLock wifiLock = new WifiLock(lockMode, tag, binder); @@ -2139,12 +1130,6 @@ public class WifiService extends IWifiManager.Stub { ++mFullLocksAcquired; mBatteryStats.noteFullWifiLockAcquired(uid); break; - case WifiManager.WIFI_MODE_FULL_HIGH_PERF: - ++mFullHighPerfLocksAcquired; - /* Treat high power as a full lock for battery stats */ - mBatteryStats.noteFullWifiLockAcquired(uid); - break; - case WifiManager.WIFI_MODE_SCAN_ONLY: ++mScanLocksAcquired; mBatteryStats.noteScanWifiLockAcquired(uid); @@ -2184,10 +1169,6 @@ public class WifiService extends IWifiManager.Stub { ++mFullLocksReleased; mBatteryStats.noteFullWifiLockReleased(uid); break; - case WifiManager.WIFI_MODE_FULL_HIGH_PERF: - ++mFullHighPerfLocksReleased; - mBatteryStats.noteFullWifiLockReleased(uid); - break; case WifiManager.WIFI_MODE_SCAN_ONLY: ++mScanLocksReleased; mBatteryStats.noteScanWifiLockReleased(uid); @@ -2258,7 +1239,7 @@ public class WifiService extends IWifiManager.Stub { if (mMulticasters.size() != 0) { return; } else { - mWifiStateTracker.startPacketFiltering(); + mWifiStateMachine.startPacketFiltering(); } } } @@ -2273,7 +1254,7 @@ public class WifiService extends IWifiManager.Stub { // 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. - mWifiStateTracker.stopPacketFiltering(); + mWifiStateMachine.stopPacketFiltering(); } int uid = Binder.getCallingUid(); @@ -2310,7 +1291,7 @@ public class WifiService extends IWifiManager.Stub { removed.unlinkDeathRecipient(); } if (mMulticasters.size() == 0) { - mWifiStateTracker.startPacketFiltering(); + mWifiStateMachine.startPacketFiltering(); } Long ident = Binder.clearCallingIdentity(); @@ -2329,4 +1310,144 @@ public class WifiService extends IWifiManager.Stub { return (mMulticasters.size() > 0); } } + + private void checkAndSetNotification() { + // If we shouldn't place a notification on available networks, then + // don't bother doing any of the following + if (!mNotificationEnabled) return; + + State state = mNetworkInfo.getState(); + if ((state == NetworkInfo.State.DISCONNECTED) + || (state == NetworkInfo.State.UNKNOWN)) { + // Look for an open network + List<ScanResult> scanResults = mWifiStateMachine.syncGetScanResultsList(); + if (scanResults != null) { + int numOpenNetworks = 0; + for (int i = scanResults.size() - 1; i >= 0; i--) { + ScanResult scanResult = scanResults.get(i); + + if (TextUtils.isEmpty(scanResult.capabilities)) { + numOpenNetworks++; + } + } + + if (numOpenNetworks > 0) { + if (++mNumScansSinceNetworkStateChange >= NUM_SCANS_BEFORE_ACTUALLY_SCANNING) { + /* + * We've scanned continuously at least + * NUM_SCANS_BEFORE_NOTIFICATION times. The user + * probably does not have a remembered network in range, + * since otherwise supplicant would have tried to + * associate and thus resetting this counter. + */ + setNotificationVisible(true, numOpenNetworks, false, 0); + } + return; + } + } + } + + // No open networks in range, remove the notification + setNotificationVisible(false, 0, false, 0); + } + + /** + * Clears variables related to tracking whether a notification has been + * shown recently and clears the current notification. + */ + private void resetNotification() { + mNotificationRepeatTime = 0; + mNumScansSinceNetworkStateChange = 0; + setNotificationVisible(false, 0, false, 0); + } + + /** + * Display or don't display a notification that there are open Wi-Fi networks. + * @param visible {@code true} if notification should be visible, {@code false} otherwise + * @param numNetworks the number networks seen + * @param force {@code true} to force notification to be shown/not-shown, + * even if it is already shown/not-shown. + * @param delay time in milliseconds after which the notification should be made + * visible or invisible. + */ + private void setNotificationVisible(boolean visible, int numNetworks, boolean force, + int delay) { + + // Since we use auto cancel on the notification, when the + // mNetworksAvailableNotificationShown is true, the notification may + // have actually been canceled. However, when it is false we know + // for sure that it is not being shown (it will not be shown any other + // place than here) + + // If it should be hidden and it is already hidden, then noop + if (!visible && !mNotificationShown && !force) { + return; + } + + NotificationManager notificationManager = (NotificationManager) mContext + .getSystemService(Context.NOTIFICATION_SERVICE); + + Message message; + if (visible) { + + // Not enough time has passed to show the notification again + if (System.currentTimeMillis() < mNotificationRepeatTime) { + return; + } + + if (mNotification == null) { + // Cache the Notification object. + mNotification = new Notification(); + mNotification.when = 0; + mNotification.icon = ICON_NETWORKS_AVAILABLE; + mNotification.flags = Notification.FLAG_AUTO_CANCEL; + mNotification.contentIntent = PendingIntent.getActivity(mContext, 0, + new Intent(WifiManager.ACTION_PICK_WIFI_NETWORK), 0); + } + + CharSequence title = mContext.getResources().getQuantityText( + com.android.internal.R.plurals.wifi_available, numNetworks); + CharSequence details = mContext.getResources().getQuantityText( + com.android.internal.R.plurals.wifi_available_detailed, numNetworks); + mNotification.tickerText = title; + mNotification.setLatestEventInfo(mContext, title, details, mNotification.contentIntent); + + mNotificationRepeatTime = System.currentTimeMillis() + NOTIFICATION_REPEAT_DELAY_MS; + + notificationManager.notify(ICON_NETWORKS_AVAILABLE, mNotification); + } else { + notificationManager.cancel(ICON_NETWORKS_AVAILABLE); + } + + mNotificationShown = visible; + } + + private class NotificationEnabledSettingObserver extends ContentObserver { + + public NotificationEnabledSettingObserver(Handler handler) { + super(handler); + } + + public void register() { + ContentResolver cr = mContext.getContentResolver(); + cr.registerContentObserver(Settings.Secure.getUriFor( + Settings.Secure.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON), true, this); + mNotificationEnabled = getValue(); + } + + @Override + public void onChange(boolean selfChange) { + super.onChange(selfChange); + + mNotificationEnabled = getValue(); + resetNotification(); + } + + private boolean getValue() { + return Settings.Secure.getInt(mContext.getContentResolver(), + Settings.Secure.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON, 1) == 1; + } + } + + } |