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|
/*
* 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;
import android.app.AlarmManager;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.bluetooth.BluetoothA2dp;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.ContentResolver;
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.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.DhcpInfo;
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.Message;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.provider.Settings;
import android.text.TextUtils;
import android.util.Slog;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import com.android.internal.app.IBatteryStats;
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 class WifiService extends IWifiManager.Stub {
private static final String TAG = "WifiService";
private static final boolean DBG = true;
private final WifiStateMachine mWifiStateMachine;
private Context mContext;
private AlarmManager mAlarmManager;
private PendingIntent mIdleIntent;
private static final int IDLE_REQUEST = 0;
private boolean mScreenOff;
private boolean mDeviceIdle;
private int mPluggedType;
// true if the user enabled Wifi while in airplane mode
private AtomicBoolean mAirplaneModeOverwridden = new AtomicBoolean(false);
private final LockList mLocks = new LockList();
// some wifi lock statistics
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;
ConnectivityManager mCm;
private String[] mWifiRegexs;
/**
* See {@link Settings.Secure#WIFI_IDLE_MS}. This is the default value if a
* Settings.Secure 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_MILLIS = 15 * 60 * 1000; /* 15 minutes */
/**
* Number of allowed radio frequency channels in various regulatory domains.
* This list is sufficient for 802.11b/g networks (2.4GHz range).
*/
private static int[] sValidRegulatoryChannelCounts = new int[] {11, 13, 14};
private static final String ACTION_DEVICE_IDLE =
"com.android.server.WifiManager.action.DEVICE_IDLE";
private boolean mIsReceiverRegistered = false;
NetworkInfo mNetworkInfo = new NetworkInfo(ConnectivityManager.TYPE_WIFI, 0, "WIFI", "");
// 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 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 final long NOTIFICATION_REPEAT_DELAY_MS;
/**
* Whether the user has set the setting to show the 'available networks' notification.
*/
private boolean mNotificationEnabled;
/**
* Observes the user setting to keep {@link #mNotificationEnabled} in sync.
*/
private NotificationEnabledSettingObserver mNotificationEnabledSettingObserver;
/**
* The {@link System#currentTimeMillis()} must be at least this value for us
* to show the notification again.
*/
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;
WifiService(Context context) {
mContext = context;
mWifiStateMachine = new WifiStateMachine(mContext);
mWifiStateMachine.enableRssiPolling(true);
mBatteryStats = BatteryStatsService.getService();
mAlarmManager = (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE);
Intent idleIntent = new Intent(ACTION_DEVICE_IDLE, null);
mIdleIntent = PendingIntent.getBroadcast(mContext, IDLE_REQUEST, idleIntent, 0);
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.set(false);
// on airplane disable, restore Wifi if the saved state indicates so
if (!isAirplaneModeOn() && testAndClearWifiSavedState()) {
persistWifiEnabled(true);
}
updateWifiState();
}
},
new IntentFilter(Intent.ACTION_AIRPLANE_MODE_CHANGED));
mContext.registerReceiver(
new BroadcastReceiver() {
@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);
}
},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();
}
/**
* Check if Wi-Fi needs to be enabled and start
* if needed
*
* This function is used only at boot time
*/
public void checkAndStartWifi() {
/* Start if Wi-Fi is enabled or the saved state indicates Wi-Fi was on */
boolean wifiEnabled = !isAirplaneModeOn()
&& (getPersistedWifiEnabled() || testAndClearWifiSavedState());
Slog.i(TAG, "WifiService starting up with Wi-Fi " +
(wifiEnabled ? "enabled" : "disabled"));
setWifiEnabled(wifiEnabled);
}
private void updateTetherState(ArrayList<String> available, ArrayList<String> tethered) {
boolean wifiTethered = false;
boolean wifiAvailable = false;
IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE);
INetworkManagementService service = INetworkManagementService.Stub.asInterface(b);
if (mCm == null) {
mCm = (ConnectivityManager)mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
}
mWifiRegexs = mCm.getTetherableWifiRegexs();
for (String intf : available) {
for (String regex : mWifiRegexs) {
if (intf.matches(regex)) {
InterfaceConfiguration ifcg = null;
try {
ifcg = service.getInterfaceConfig(intf);
if (ifcg != null) {
/* IP/netmask: 192.168.43.1/255.255.255.0 */
ifcg.ipAddr = (192 << 24) + (168 << 16) + (43 << 8) + 1;
ifcg.netmask = (255 << 24) + (255 << 16) + (255 << 8) + 0;
ifcg.interfaceFlags = "up";
service.setInterfaceConfig(intf, ifcg);
}
} catch (Exception e) {
Slog.e(TAG, "Error configuring interface " + intf + ", :" + e);
setWifiApEnabled(null, false);
return;
}
if(mCm.tether(intf) != ConnectivityManager.TETHER_ERROR_NO_ERROR) {
Slog.e(TAG, "Error tethering on " + intf);
setWifiApEnabled(null, false);
return;
}
break;
}
}
}
}
private boolean testAndClearWifiSavedState() {
final ContentResolver cr = mContext.getContentResolver();
int wifiSavedState = 0;
try {
wifiSavedState = Settings.Secure.getInt(cr, Settings.Secure.WIFI_SAVED_STATE);
if(wifiSavedState == 1)
Settings.Secure.putInt(cr, Settings.Secure.WIFI_SAVED_STATE, 0);
} catch (Settings.SettingNotFoundException e) {
;
}
return (wifiSavedState == 1);
}
private boolean getPersistedWifiEnabled() {
final ContentResolver cr = mContext.getContentResolver();
try {
return Settings.Secure.getInt(cr, Settings.Secure.WIFI_ON) == 1;
} catch (Settings.SettingNotFoundException e) {
Settings.Secure.putInt(cr, Settings.Secure.WIFI_ON, 0);
return false;
}
}
private void persistWifiEnabled(boolean enabled) {
final ContentResolver cr = mContext.getContentResolver();
Settings.Secure.putInt(cr, Settings.Secure.WIFI_ON, enabled ? 1 : 0);
}
/**
* see {@link android.net.wifi.WifiManager#pingSupplicant()}
* @return {@code true} if the operation succeeds, {@code false} otherwise
*/
public boolean pingSupplicant() {
enforceAccessPermission();
return mWifiStateMachine.pingSupplicant();
}
/**
* see {@link android.net.wifi.WifiManager#startScan()}
* @return {@code true} if the operation succeeds
*/
public boolean startScan(boolean forceActive) {
enforceChangePermission();
return 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");
}
private void enforceMulticastChangePermission() {
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.CHANGE_WIFI_MULTICAST_STATE,
"WifiService");
}
/**
* 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();
if (DBG) {
Slog.e(TAG, "Invoking mWifiStateMachine.setWifiEnabled\n");
}
// set a flag if the user is enabling Wifi while in airplane mode
if (enable && isAirplaneModeOn() && isAirplaneToggleable()) {
mAirplaneModeOverwridden.set(true);
}
mWifiStateMachine.setWifiEnabled(enable);
persistWifiEnabled(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.getWifiState();
}
/**
* 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
* @return {@code true} if the start operation was
* started or is already in the queue.
*/
public synchronized boolean setWifiApEnabled(WifiConfiguration wifiConfig, boolean enabled) {
enforceChangePermission();
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);
}
setWifiApConfiguration(wifiConfig);
}
mWifiStateMachine.setWifiApEnabled(wifiConfig, enabled);
return true;
}
/**
* 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.getWifiApState();
}
/**
* see {@link WifiManager#getWifiApConfiguration()}
* @return soft access point configuration
*/
public synchronized WifiConfiguration getWifiApConfiguration() {
final ContentResolver cr = mContext.getContentResolver();
WifiConfiguration wifiConfig = new WifiConfiguration();
int authType;
try {
wifiConfig.SSID = Settings.Secure.getString(cr, Settings.Secure.WIFI_AP_SSID);
if (wifiConfig.SSID == null)
return null;
authType = Settings.Secure.getInt(cr, Settings.Secure.WIFI_AP_SECURITY);
wifiConfig.allowedKeyManagement.set(authType);
wifiConfig.preSharedKey = Settings.Secure.getString(cr, Settings.Secure.WIFI_AP_PASSWD);
return wifiConfig;
} catch (Settings.SettingNotFoundException e) {
Slog.e(TAG,"AP settings not found, returning");
return null;
}
}
/**
* 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;
if (wifiConfig == null)
return;
Settings.Secure.putString(cr, Settings.Secure.WIFI_AP_SSID, wifiConfig.SSID);
isWpa = wifiConfig.allowedKeyManagement.get(KeyMgmt.WPA_PSK);
Settings.Secure.putInt(cr,
Settings.Secure.WIFI_AP_SECURITY,
isWpa ? KeyMgmt.WPA_PSK : KeyMgmt.NONE);
if (isWpa)
Settings.Secure.putString(cr, Settings.Secure.WIFI_AP_PASSWD, wifiConfig.preSharedKey);
}
/**
* see {@link android.net.wifi.WifiManager#disconnect()}
* @return {@code true} if the operation succeeds
*/
public boolean disconnect() {
enforceChangePermission();
return mWifiStateMachine.disconnectCommand();
}
/**
* see {@link android.net.wifi.WifiManager#reconnect()}
* @return {@code true} if the operation succeeds
*/
public boolean reconnect() {
enforceChangePermission();
return mWifiStateMachine.reconnectCommand();
}
/**
* see {@link android.net.wifi.WifiManager#reassociate()}
* @return {@code true} if the operation succeeds
*/
public boolean reassociate() {
enforceChangePermission();
return mWifiStateMachine.reassociateCommand();
}
/**
* see {@link android.net.wifi.WifiManager#getConfiguredNetworks()}
* @return the list of configured networks
*/
public List<WifiConfiguration> getConfiguredNetworks() {
enforceAccessPermission();
return mWifiStateMachine.getConfiguredNetworks();
}
/**
* 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();
return mWifiStateMachine.addOrUpdateNetwork(config);
}
/**
* 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();
return mWifiStateMachine.removeNetwork(netId);
}
/**
* 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();
return mWifiStateMachine.enableNetwork(netId, disableOthers);
}
/**
* 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();
return mWifiStateMachine.disableNetwork(netId);
}
/**
* 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.requestConnectionInfo();
}
/**
* 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() {
enforceAccessPermission();
return mWifiStateMachine.getScanResultsList();
}
/**
* 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();
return mWifiStateMachine.saveConfig();
}
/**
* Set the number of radio frequency channels that are allowed to be used
* in the current regulatory domain. This method should be used only
* if the correct number of channels cannot be determined automatically
* for some reason. If the operation is successful, the new value may be
* persisted as a Secure setting.
* @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, e.g.,
* {@code numChannels} is outside the valid range.
*/
public synchronized boolean setNumAllowedChannels(int numChannels, boolean persist) {
Slog.i(TAG, "WifiService trying to setNumAllowed to "+numChannels+
" with persist set to "+persist);
enforceChangePermission();
/*
* Validate the argument. We'd like to let the Wi-Fi driver do this,
* but if Wi-Fi isn't currently enabled, that's not possible, and
* we want to persist the setting anyway,so that it will take
* effect when Wi-Fi does become enabled.
*/
boolean found = false;
for (int validChan : sValidRegulatoryChannelCounts) {
if (validChan == numChannels) {
found = true;
break;
}
}
if (!found) {
return false;
}
if (persist) {
Settings.Secure.putInt(mContext.getContentResolver(),
Settings.Secure.WIFI_NUM_ALLOWED_CHANNELS,
numChannels);
}
mWifiStateMachine.setNumAllowedChannels(numChannels);
return true;
}
/**
* Return the number of frequency channels that are allowed
* to be used in the current regulatory domain.
* @return the number of allowed channels, or {@code -1} if an error occurs
*/
public int getNumAllowedChannels() {
int numChannels;
enforceAccessPermission();
/*
* If we can't get the value from the driver (e.g., because
* Wi-Fi is not currently enabled), get the value from
* Settings.
*/
numChannels = mWifiStateMachine.getNumAllowedChannels();
if (numChannels < 0) {
numChannels = Settings.Secure.getInt(mContext.getContentResolver(),
Settings.Secure.WIFI_NUM_ALLOWED_CHANNELS,
-1);
}
return numChannels;
}
/**
* Return the list of valid values for the number of allowed radio channels
* for various regulatory domains.
* @return the list of channel counts
*/
public int[] getValidChannelCounts() {
enforceAccessPermission();
return sValidRegulatoryChannelCounts;
}
/**
* Return the DHCP-assigned addresses from the last successful DHCP request,
* if any.
* @return the DHCP information
*/
public DhcpInfo getDhcpInfo() {
enforceAccessPermission();
return mWifiStateMachine.getDhcpInfo();
}
/**
* 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();
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
long idleMillis =
Settings.Secure.getLong(mContext.getContentResolver(),
Settings.Secure.WIFI_IDLE_MS, DEFAULT_IDLE_MILLIS);
int stayAwakeConditions =
Settings.System.getInt(mContext.getContentResolver(),
Settings.System.STAY_ON_WHILE_PLUGGED_IN, 0);
if (action.equals(Intent.ACTION_SCREEN_ON)) {
Slog.d(TAG, "ACTION_SCREEN_ON");
mAlarmManager.cancel(mIdleIntent);
mDeviceIdle = false;
mScreenOff = false;
mWifiStateMachine.enableRssiPolling(true);
} else if (action.equals(Intent.ACTION_SCREEN_OFF)) {
Slog.d(TAG, "ACTION_SCREEN_OFF");
mScreenOff = true;
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
* current power conditions (i.e, not plugged in, plugged in to USB,
* or plugged in to AC).
*/
if (!shouldWifiStayAwake(stayAwakeConditions, mPluggedType)) {
WifiInfo info = mWifiStateMachine.requestConnectionInfo();
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)
// 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");
mAlarmManager.set(AlarmManager.RTC_WAKEUP, triggerTime, mIdleIntent);
// // do not keep Wifi awake when screen is off if Wifi is not associated
// mDeviceIdle = true;
// updateWifiState();
} else {
long triggerTime = System.currentTimeMillis() + idleMillis;
Slog.d(TAG, "setting ACTION_DEVICE_IDLE timer for " + idleMillis + "ms");
mAlarmManager.set(AlarmManager.RTC_WAKEUP, triggerTime, mIdleIntent);
}
}
/* we can return now -- there's nothing to do until we get the idle intent back */
return;
} else if (action.equals(ACTION_DEVICE_IDLE)) {
Slog.d(TAG, "got ACTION_DEVICE_IDLE");
mDeviceIdle = 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);
Slog.d(TAG, "ACTION_BATTERY_CHANGED pluggedType: " + pluggedType);
if (mScreenOff && shouldWifiStayAwake(stayAwakeConditions, mPluggedType) &&
!shouldWifiStayAwake(stayAwakeConditions, pluggedType)) {
long triggerTime = System.currentTimeMillis() + idleMillis;
Slog.d(TAG, "setting ACTION_DEVICE_IDLE timer for " + idleMillis + "ms");
mAlarmManager.set(AlarmManager.RTC_WAKEUP, triggerTime, mIdleIntent);
mPluggedType = pluggedType;
return;
}
mPluggedType = pluggedType;
} else if (action.equals(BluetoothA2dp.ACTION_SINK_STATE_CHANGED)) {
BluetoothA2dp a2dp = new BluetoothA2dp(mContext);
Set<BluetoothDevice> sinks = a2dp.getConnectedSinks();
boolean isBluetoothPlaying = false;
for (BluetoothDevice sink : sinks) {
if (a2dp.getSinkState(sink) == BluetoothA2dp.STATE_PLAYING) {
isBluetoothPlaying = true;
}
}
mWifiStateMachine.setBluetoothScanMode(isBluetoothPlaying);
} else {
return;
}
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) {
int wifiSleepPolicy = Settings.System.getInt(mContext.getContentResolver(),
Settings.System.WIFI_SLEEP_POLICY, Settings.System.WIFI_SLEEP_POLICY_DEFAULT);
if (wifiSleepPolicy == Settings.System.WIFI_SLEEP_POLICY_NEVER) {
// Never sleep
return true;
} else if ((wifiSleepPolicy == Settings.System.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 updateWifiState() {
boolean wifiEnabled = getPersistedWifiEnabled();
boolean airplaneMode = isAirplaneModeOn() && !mAirplaneModeOverwridden.get();
boolean lockHeld = mLocks.hasLocks();
int strongestLockMode;
boolean wifiShouldBeEnabled = wifiEnabled && !airplaneMode;
boolean wifiShouldBeStarted = !mDeviceIdle || lockHeld;
if (mDeviceIdle && lockHeld) {
strongestLockMode = mLocks.getStrongestLockMode();
} else {
strongestLockMode = WifiManager.WIFI_MODE_FULL;
}
/* Disable tethering when airplane mode is enabled */
if (airplaneMode) {
mWifiStateMachine.setWifiApEnabled(null, false);
}
if (wifiShouldBeEnabled) {
if (wifiShouldBeStarted) {
mWifiStateMachine.setWifiEnabled(true);
mWifiStateMachine.setScanOnlyMode(
strongestLockMode == WifiManager.WIFI_MODE_SCAN_ONLY);
mWifiStateMachine.setDriverStart(true);
} else {
mWifiStateMachine.requestCmWakeLock();
mWifiStateMachine.setDriverStart(false);
}
} 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(BluetoothA2dp.ACTION_SINK_STATE_CHANGED);
mContext.registerReceiver(mReceiver, intentFilter);
}
private boolean isAirplaneSensitive() {
String airplaneModeRadios = Settings.System.getString(mContext.getContentResolver(),
Settings.System.AIRPLANE_MODE_RADIOS);
return airplaneModeRadios == null
|| airplaneModeRadios.contains(Settings.System.RADIO_WIFI);
}
private boolean isAirplaneToggleable() {
String toggleableRadios = Settings.System.getString(mContext.getContentResolver(),
Settings.System.AIRPLANE_MODE_TOGGLEABLE_RADIOS);
return toggleableRadios != null
&& toggleableRadios.contains(Settings.System.RADIO_WIFI);
}
/**
* Returns true if Wi-Fi is sensitive to airplane mode, and airplane mode is
* currently on.
* @return {@code true} if airplane mode is on.
*/
private boolean isAirplaneModeOn() {
return isAirplaneSensitive() && Settings.System.getInt(mContext.getContentResolver(),
Settings.System.AIRPLANE_MODE_ON, 0) == 1;
}
@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.getWifiStateByName());
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(mWifiStateMachine);
pw.println();
pw.println("Latest scan results:");
List<ScanResult> scanResults = mWifiStateMachine.getScanResultsList();
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, " +
mScanLocksAcquired + " scan");
pw.println("Locks released: " + mFullLocksReleased + " full, " +
mScanLocksReleased + " scan");
pw.println();
pw.println("Locks held:");
mLocks.dump(pw);
}
private class WifiLock extends DeathRecipient {
WifiLock(int lockMode, String tag, IBinder binder) {
super(lockMode, tag, binder);
}
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;
}
for (WifiLock l : mList) {
if (l.mMode == WifiManager.WIFI_MODE_FULL) {
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);
}
}
}
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) {
return false;
}
WifiLock wifiLock = new WifiLock(lockMode, tag, binder);
synchronized (mLocks) {
return acquireWifiLockLocked(wifiLock);
}
}
private boolean acquireWifiLockLocked(WifiLock wifiLock) {
Slog.d(TAG, "acquireWifiLockLocked: " + wifiLock);
mLocks.addLock(wifiLock);
int uid = Binder.getCallingUid();
long ident = Binder.clearCallingIdentity();
try {
switch(wifiLock.mMode) {
case WifiManager.WIFI_MODE_FULL:
++mFullLocksAcquired;
mBatteryStats.noteFullWifiLockAcquired(uid);
break;
case WifiManager.WIFI_MODE_SCAN_ONLY:
++mScanLocksAcquired;
mBatteryStats.noteScanWifiLockAcquired(uid);
break;
}
} catch (RemoteException e) {
} finally {
Binder.restoreCallingIdentity(ident);
}
updateWifiState();
return true;
}
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);
Slog.d(TAG, "releaseWifiLockLocked: " + wifiLock);
hadLock = (wifiLock != null);
if (hadLock) {
int uid = Binder.getCallingUid();
long ident = Binder.clearCallingIdentity();
try {
switch(wifiLock.mMode) {
case WifiManager.WIFI_MODE_FULL:
++mFullLocksReleased;
mBatteryStats.noteFullWifiLockReleased(uid);
break;
case WifiManager.WIFI_MODE_SCAN_ONLY:
++mScanLocksReleased;
mBatteryStats.noteScanWifiLockReleased(uid);
break;
}
} catch (RemoteException e) {
} finally {
Binder.restoreCallingIdentity(ident);
}
}
// TODO - should this only happen if you hadLock?
updateWifiState();
return hadLock;
}
private abstract class DeathRecipient
implements IBinder.DeathRecipient {
String mTag;
int mMode;
IBinder mBinder;
DeathRecipient(int mode, String tag, IBinder binder) {
super();
mTag = tag;
mMode = mode;
mBinder = binder;
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);
}
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.startPacketFiltering();
}
}
}
public void acquireMulticastLock(IBinder binder, String tag) {
enforceMulticastChangePermission();
synchronized (mMulticasters) {
mMulticastEnabled++;
mMulticasters.add(new Multicaster(tag, binder));
// Note that we could call stopPacketFiltering 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.stopPacketFiltering();
}
int uid = Binder.getCallingUid();
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.startPacketFiltering();
}
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);
}
}
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.getScanResultsList();
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 mainly so we can remove the
// EVENT_NOTIFICATION_CHANGED message with this Notification from
// the queue later
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);
/*
* TODO: Clean up connectivity service & remove this
*/
/* message = mCsHandler.obtainMessage(EVENT_NOTIFICATION_CHANGED, 1,
ICON_NETWORKS_AVAILABLE, mNotification); */
} else {
notificationManager.cancel(ICON_NETWORKS_AVAILABLE);
/*
* TODO: Clean up connectivity service & remove this
*/
/*
// Remove any pending messages to show the notification
mCsHandler.removeMessages(EVENT_NOTIFICATION_CHANGED, mNotification);
message = mCsHandler.obtainMessage(EVENT_NOTIFICATION_CHANGED, 0,
ICON_NETWORKS_AVAILABLE);
*/
}
//mCsHandler.sendMessageDelayed(message, delay);
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;
}
}
}
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