src/com/android/settings/TetherService.java - platform/packages/apps/Settings - Git at Google

 /*
  * Copyright (C) 2008 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.settings;

 import android.app.Activity;
 import android.app.AlarmManager;
 import android.app.PendingIntent;
 import android.app.Service;
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothPan;
 import android.bluetooth.BluetoothProfile;
 import android.bluetooth.BluetoothProfile.ServiceListener;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.SharedPreferences;
 import android.net.ConnectivityManager;
 import android.net.wifi.WifiManager;
 import android.os.IBinder;
 import android.os.SystemClock;
 import android.text.TextUtils;
 import android.util.Log;

 import com.android.settings.wifi.WifiApEnabler;

 import java.util.ArrayList;

 public class TetherService extends Service {
     private static final String TAG = "TetherService";
     private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);

     public static final String EXTRA_ADD_TETHER_TYPE = "extraAddTetherType";
     public static final String EXTRA_REM_TETHER_TYPE = "extraRemTetherType";
     public static final String EXTRA_SET_ALARM = "extraSetAlarm";
     public static final String EXTRA_RUN_PROVISION = "extraRunProvision";
     public static final String EXTRA_ENABLE_WIFI_TETHER = "extraEnableWifiTether";

     private static final String EXTRA_RESULT = "EntitlementResult";

     // Activity results to match the activity provision protocol.
     // Default to something not ok.
     private static final int RESULT_DEFAULT = Activity.RESULT_CANCELED;
     private static final int RESULT_OK = Activity.RESULT_OK;

     private static final String TETHER_CHOICE = "TETHER_TYPE";
     private static final int MS_PER_HOUR = 60 * 60 * 1000;

     private static final String PREFS = "tetherPrefs";
     private static final String KEY_TETHERS = "currentTethers";

     private int mCurrentTypeIndex;
     private boolean mEnableWifiAfterCheck;
     private boolean mInProvisionCheck;
     private ArrayList<Integer> mCurrentTethers;

     @Override
     public IBinder onBind(Intent intent) {
         return null;
     }

     @Override
     public void onCreate() {
         super.onCreate();
         if (DEBUG) Log.d(TAG, "Creating WifiProvisionService");
         String provisionResponse = getResources().getString(
                 com.android.internal.R.string.config_mobile_hotspot_provision_response);
         registerReceiver(mReceiver, new IntentFilter(provisionResponse),
                 android.Manifest.permission.CONNECTIVITY_INTERNAL, null);
         SharedPreferences prefs = getSharedPreferences(PREFS, MODE_PRIVATE);
         mCurrentTethers = stringToTethers(prefs.getString(KEY_TETHERS, ""));
         mCurrentTypeIndex = 0;
     }

     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
         if (intent.hasExtra(EXTRA_ADD_TETHER_TYPE)) {
             int type = intent.getIntExtra(EXTRA_ADD_TETHER_TYPE, TetherSettings.INVALID);
             if (!mCurrentTethers.contains(type)) {
                 if (DEBUG) Log.d(TAG, "Adding tether " + type);
                 mCurrentTethers.add(type);
             }
         }
         if (intent.hasExtra(EXTRA_REM_TETHER_TYPE)) {
             int type = intent.getIntExtra(EXTRA_REM_TETHER_TYPE, TetherSettings.INVALID);
             if (DEBUG) Log.d(TAG, "Removing tether " + type);
             int index = mCurrentTethers.indexOf(type);
             if (index >= 0) {
                 mCurrentTethers.remove(index);
                 // If we are currently in the middle of a check, we may need to adjust the
                 // index accordingly.
                 if (index <= mCurrentTypeIndex && mCurrentTypeIndex > 0) {
                     mCurrentTypeIndex--;
                 }
             }
             cancelAlarmIfNecessary();
         }
         // Only set the alarm if we have one tether, meaning the one just added,
         // to avoid setting it when it was already set previously for another
         // type.
         if (intent.getBooleanExtra(EXTRA_SET_ALARM, false)
                 && mCurrentTethers.size() == 1) {
             scheduleAlarm();
         }

         if (intent.getBooleanExtra(EXTRA_ENABLE_WIFI_TETHER, false)) {
             mEnableWifiAfterCheck = true;
         }

         if (intent.getBooleanExtra(EXTRA_RUN_PROVISION, false)) {
             startProvisioning(mCurrentTypeIndex);
         } else if (!mInProvisionCheck) {
             // If we aren't running any provisioning, no reason to stay alive.
             stopSelf();
             return START_NOT_STICKY;
         }
         // We want to be started if we are killed accidently, so that we can be sure we finish
         // the check.
         return START_STICKY;
     }

     @Override
     public void onDestroy() {
         if (mInProvisionCheck) {
             Log.e(TAG, "TetherService getting destroyed while mid-provisioning"
                     + mCurrentTethers.get(mCurrentTypeIndex));
         }
         SharedPreferences prefs = getSharedPreferences(PREFS, MODE_PRIVATE);
         prefs.edit().putString(KEY_TETHERS, tethersToString(mCurrentTethers)).commit();

         if (DEBUG) Log.d(TAG, "Destroying WifiProvisionService");
         unregisterReceiver(mReceiver);
         super.onDestroy();
     }

     private ArrayList<Integer> stringToTethers(String tethersStr) {
         ArrayList<Integer> ret = new ArrayList<Integer>();
         if (TextUtils.isEmpty(tethersStr)) return ret;

         String[] tethersSplit = tethersStr.split(",");
         for (int i = 0; i < tethersSplit.length; i++) {
             ret.add(Integer.parseInt(tethersSplit[i]));
         }
         return ret;
     }

     private String tethersToString(ArrayList<Integer> tethers) {
         final StringBuffer buffer = new StringBuffer();
         final int N = tethers.size();
         for (int i = 0; i < N; i++) {
             if (i != 0) {
                 buffer.append(',');
             }
             buffer.append(tethers.get(i));
         }

         return buffer.toString();
     }

     private void enableWifiTetheringIfNeeded() {
         if (!isHotspotEnabled(this)) {
             new WifiApEnabler(this, null).setSoftapEnabled(true);
         }
     }

     private void disableWifiTethering() {
         WifiApEnabler enabler = new WifiApEnabler(this, null);
         enabler.setSoftapEnabled(false);
     }

     private void disableUsbTethering() {
         ConnectivityManager cm =
                 (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
         cm.setUsbTethering(false);
     }

     private void disableBtTethering() {
         final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
         if (adapter != null) {
             adapter.getProfileProxy(this, new ServiceListener() {
                 @Override
                 public void onServiceDisconnected(int profile) { }

                 @Override
                 public void onServiceConnected(int profile, BluetoothProfile proxy) {
                     ((BluetoothPan) proxy).setBluetoothTethering(false);
                     adapter.closeProfileProxy(BluetoothProfile.PAN, proxy);
                 }
             }, BluetoothProfile.PAN);
         }
     }

     private void startProvisioning(int index) {
         String provisionAction = getResources().getString(
                 com.android.internal.R.string.config_mobile_hotspot_provision_app_no_ui);
         if (DEBUG) Log.d(TAG, "Sending provisioning broadcast: " + provisionAction + " type: "
                 + mCurrentTethers.get(index));
         Intent intent = new Intent(provisionAction);
         intent.putExtra(TETHER_CHOICE, mCurrentTethers.get(index));
         intent.setFlags(Intent.FLAG_RECEIVER_FOREGROUND);
         sendBroadcast(intent);
         mInProvisionCheck = true;
     }

     private static boolean isHotspotEnabled(Context context) {
         WifiManager wifiManager = (WifiManager) context.getSystemService(WIFI_SERVICE);
         return wifiManager.getWifiApState() == WifiManager.WIFI_AP_STATE_ENABLED;
     }

     public static void scheduleRecheckAlarm(Context context, int type) {
         Intent intent = new Intent(context, TetherService.class);
         intent.putExtra(EXTRA_ADD_TETHER_TYPE, type);
         intent.putExtra(EXTRA_SET_ALARM, true);
         context.startService(intent);
     }

     private void scheduleAlarm() {
         Intent intent = new Intent(this, TetherService.class);
         intent.putExtra(EXTRA_RUN_PROVISION, true);

         PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent, 0);
         AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
         int period = getResources().getInteger(
                 com.android.internal.R.integer.config_mobile_hotspot_provision_check_period);
         long periodMs = period * MS_PER_HOUR;
         long firstTime = SystemClock.elapsedRealtime() + periodMs;
         if (DEBUG) Log.d(TAG, "Scheduling alarm at interval " + periodMs);
         alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME, firstTime, periodMs,
                 pendingIntent);
     }

     /**
      * Cancels the recheck alarm only if no tethering is currently active.
      *
      * Runs in the background, to get access to bluetooth service that takes time to bind.
      */
     public static void cancelRecheckAlarmIfNecessary(final Context context, int type) {
         Intent intent = new Intent(context, TetherService.class);
         intent.putExtra(EXTRA_REM_TETHER_TYPE, type);
         context.startService(intent);
     }

     private void cancelAlarmIfNecessary() {
         if (mCurrentTethers.size() != 0) {
             if (DEBUG) Log.d(TAG, "Tethering still active, not cancelling alarm");
             return;
         }
         Intent intent = new Intent(this, TetherService.class);
         PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent, 0);
         AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
         alarmManager.cancel(pendingIntent);
         if (DEBUG) Log.d(TAG, "Tethering no longer active, canceling recheck");
     }

     private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
             if (DEBUG) Log.d(TAG, "Got provision result " + intent);
             String provisionResponse = context.getResources().getString(
                     com.android.internal.R.string.config_mobile_hotspot_provision_response);
             if (provisionResponse.equals(intent.getAction())) {
                 mInProvisionCheck = false;
                 int checkType = mCurrentTethers.get(mCurrentTypeIndex);
                 if (intent.getIntExtra(EXTRA_RESULT, RESULT_DEFAULT) == RESULT_OK) {
                     if (checkType == TetherSettings.WIFI_TETHERING && mEnableWifiAfterCheck) {
                         enableWifiTetheringIfNeeded();
                         mEnableWifiAfterCheck = false;
                     }
                 } else {
                     switch (checkType) {
                         case TetherSettings.WIFI_TETHERING:
                             disableWifiTethering();
                             break;
                         case TetherSettings.BLUETOOTH_TETHERING:
                             disableBtTethering();
                             break;
                         case TetherSettings.USB_TETHERING:
                             disableUsbTethering();
                             break;
                     }
                 }
                 if (++mCurrentTypeIndex == mCurrentTethers.size()) {
                     // We are done with all checks, time to die.
                     stopSelf();
                 } else {
                     // Start the next check in our list.
                     startProvisioning(mCurrentTypeIndex);
                 }
             }
         }
     };

 }
	/*
	* Copyright (C) 2008 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.settings;

	import android.app.Activity;
	import android.app.AlarmManager;
	import android.app.PendingIntent;
	import android.app.Service;
	import android.bluetooth.BluetoothAdapter;
	import android.bluetooth.BluetoothPan;
	import android.bluetooth.BluetoothProfile;
	import android.bluetooth.BluetoothProfile.ServiceListener;
	import android.content.BroadcastReceiver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.content.SharedPreferences;
	import android.net.ConnectivityManager;
	import android.net.wifi.WifiManager;
	import android.os.IBinder;
	import android.os.SystemClock;
	import android.text.TextUtils;
	import android.util.Log;

	import com.android.settings.wifi.WifiApEnabler;

	import java.util.ArrayList;

	public class TetherService extends Service {
	private static final String TAG = "TetherService";
	private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);

	public static final String EXTRA_ADD_TETHER_TYPE = "extraAddTetherType";
	public static final String EXTRA_REM_TETHER_TYPE = "extraRemTetherType";
	public static final String EXTRA_SET_ALARM = "extraSetAlarm";
	public static final String EXTRA_RUN_PROVISION = "extraRunProvision";
	public static final String EXTRA_ENABLE_WIFI_TETHER = "extraEnableWifiTether";

	private static final String EXTRA_RESULT = "EntitlementResult";

	// Activity results to match the activity provision protocol.
	// Default to something not ok.
	private static final int RESULT_DEFAULT = Activity.RESULT_CANCELED;
	private static final int RESULT_OK = Activity.RESULT_OK;

	private static final String TETHER_CHOICE = "TETHER_TYPE";
	private static final int MS_PER_HOUR = 60 * 60 * 1000;

	private static final String PREFS = "tetherPrefs";
	private static final String KEY_TETHERS = "currentTethers";

	private int mCurrentTypeIndex;
	private boolean mEnableWifiAfterCheck;
	private boolean mInProvisionCheck;
	private ArrayList<Integer> mCurrentTethers;

	@Override
	public IBinder onBind(Intent intent) {
	return null;
	}

	@Override
	public void onCreate() {
	super.onCreate();
	if (DEBUG) Log.d(TAG, "Creating WifiProvisionService");
	String provisionResponse = getResources().getString(
	com.android.internal.R.string.config_mobile_hotspot_provision_response);
	registerReceiver(mReceiver, new IntentFilter(provisionResponse),
	android.Manifest.permission.CONNECTIVITY_INTERNAL, null);
	SharedPreferences prefs = getSharedPreferences(PREFS, MODE_PRIVATE);
	mCurrentTethers = stringToTethers(prefs.getString(KEY_TETHERS, ""));
	mCurrentTypeIndex = 0;
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
	if (intent.hasExtra(EXTRA_ADD_TETHER_TYPE)) {
	int type = intent.getIntExtra(EXTRA_ADD_TETHER_TYPE, TetherSettings.INVALID);
	if (!mCurrentTethers.contains(type)) {
	if (DEBUG) Log.d(TAG, "Adding tether " + type);
	mCurrentTethers.add(type);
	}
	}
	if (intent.hasExtra(EXTRA_REM_TETHER_TYPE)) {
	int type = intent.getIntExtra(EXTRA_REM_TETHER_TYPE, TetherSettings.INVALID);
	if (DEBUG) Log.d(TAG, "Removing tether " + type);
	int index = mCurrentTethers.indexOf(type);
	if (index >= 0) {
	mCurrentTethers.remove(index);
	// If we are currently in the middle of a check, we may need to adjust the
	// index accordingly.
	if (index <= mCurrentTypeIndex && mCurrentTypeIndex > 0) {
	mCurrentTypeIndex--;
	}
	}
	cancelAlarmIfNecessary();
	}
	// Only set the alarm if we have one tether, meaning the one just added,
	// to avoid setting it when it was already set previously for another
	// type.
	if (intent.getBooleanExtra(EXTRA_SET_ALARM, false)
	&& mCurrentTethers.size() == 1) {
	scheduleAlarm();
	}

	if (intent.getBooleanExtra(EXTRA_ENABLE_WIFI_TETHER, false)) {
	mEnableWifiAfterCheck = true;
	}

	if (intent.getBooleanExtra(EXTRA_RUN_PROVISION, false)) {
	startProvisioning(mCurrentTypeIndex);
	} else if (!mInProvisionCheck) {
	// If we aren't running any provisioning, no reason to stay alive.
	stopSelf();
	return START_NOT_STICKY;
	}
	// We want to be started if we are killed accidently, so that we can be sure we finish
	// the check.
	return START_STICKY;
	}

	@Override
	public void onDestroy() {
	if (mInProvisionCheck) {
	Log.e(TAG, "TetherService getting destroyed while mid-provisioning"
	+ mCurrentTethers.get(mCurrentTypeIndex));
	}
	SharedPreferences prefs = getSharedPreferences(PREFS, MODE_PRIVATE);
	prefs.edit().putString(KEY_TETHERS, tethersToString(mCurrentTethers)).commit();

	if (DEBUG) Log.d(TAG, "Destroying WifiProvisionService");
	unregisterReceiver(mReceiver);
	super.onDestroy();
	}

	private ArrayList<Integer> stringToTethers(String tethersStr) {
	ArrayList<Integer> ret = new ArrayList<Integer>();
	if (TextUtils.isEmpty(tethersStr)) return ret;

	String[] tethersSplit = tethersStr.split(",");
	for (int i = 0; i < tethersSplit.length; i++) {
	ret.add(Integer.parseInt(tethersSplit[i]));
	}
	return ret;
	}

	private String tethersToString(ArrayList<Integer> tethers) {
	final StringBuffer buffer = new StringBuffer();
	final int N = tethers.size();
	for (int i = 0; i < N; i++) {
	if (i != 0) {
	buffer.append(',');
	}
	buffer.append(tethers.get(i));
	}

	return buffer.toString();
	}

	private void enableWifiTetheringIfNeeded() {
	if (!isHotspotEnabled(this)) {
	new WifiApEnabler(this, null).setSoftapEnabled(true);
	}
	}

	private void disableWifiTethering() {
	WifiApEnabler enabler = new WifiApEnabler(this, null);
	enabler.setSoftapEnabled(false);
	}

	private void disableUsbTethering() {
	ConnectivityManager cm =
	(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
	cm.setUsbTethering(false);
	}

	private void disableBtTethering() {
	final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
	if (adapter != null) {
	adapter.getProfileProxy(this, new ServiceListener() {
	@Override
	public void onServiceDisconnected(int profile) { }

	@Override
	public void onServiceConnected(int profile, BluetoothProfile proxy) {
	((BluetoothPan) proxy).setBluetoothTethering(false);
	adapter.closeProfileProxy(BluetoothProfile.PAN, proxy);
	}
	}, BluetoothProfile.PAN);
	}
	}

	private void startProvisioning(int index) {
	String provisionAction = getResources().getString(
	com.android.internal.R.string.config_mobile_hotspot_provision_app_no_ui);
	if (DEBUG) Log.d(TAG, "Sending provisioning broadcast: " + provisionAction + " type: "
	+ mCurrentTethers.get(index));
	Intent intent = new Intent(provisionAction);
	intent.putExtra(TETHER_CHOICE, mCurrentTethers.get(index));
	intent.setFlags(Intent.FLAG_RECEIVER_FOREGROUND);
	sendBroadcast(intent);
	mInProvisionCheck = true;
	}

	private static boolean isHotspotEnabled(Context context) {
	WifiManager wifiManager = (WifiManager) context.getSystemService(WIFI_SERVICE);
	return wifiManager.getWifiApState() == WifiManager.WIFI_AP_STATE_ENABLED;
	}

	public static void scheduleRecheckAlarm(Context context, int type) {
	Intent intent = new Intent(context, TetherService.class);
	intent.putExtra(EXTRA_ADD_TETHER_TYPE, type);
	intent.putExtra(EXTRA_SET_ALARM, true);
	context.startService(intent);
	}

	private void scheduleAlarm() {
	Intent intent = new Intent(this, TetherService.class);
	intent.putExtra(EXTRA_RUN_PROVISION, true);

	PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent, 0);
	AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
	int period = getResources().getInteger(
	com.android.internal.R.integer.config_mobile_hotspot_provision_check_period);
	long periodMs = period * MS_PER_HOUR;
	long firstTime = SystemClock.elapsedRealtime() + periodMs;
	if (DEBUG) Log.d(TAG, "Scheduling alarm at interval " + periodMs);
	alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME, firstTime, periodMs,
	pendingIntent);
	}

	/**
	* Cancels the recheck alarm only if no tethering is currently active.
	*
	* Runs in the background, to get access to bluetooth service that takes time to bind.
	*/
	public static void cancelRecheckAlarmIfNecessary(final Context context, int type) {
	Intent intent = new Intent(context, TetherService.class);
	intent.putExtra(EXTRA_REM_TETHER_TYPE, type);
	context.startService(intent);
	}

	private void cancelAlarmIfNecessary() {
	if (mCurrentTethers.size() != 0) {
	if (DEBUG) Log.d(TAG, "Tethering still active, not cancelling alarm");
	return;
	}
	Intent intent = new Intent(this, TetherService.class);
	PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent, 0);
	AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
	alarmManager.cancel(pendingIntent);
	if (DEBUG) Log.d(TAG, "Tethering no longer active, canceling recheck");
	}

	private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
	@Override
	public void onReceive(Context context, Intent intent) {
	if (DEBUG) Log.d(TAG, "Got provision result " + intent);
	String provisionResponse = context.getResources().getString(
	com.android.internal.R.string.config_mobile_hotspot_provision_response);
	if (provisionResponse.equals(intent.getAction())) {
	mInProvisionCheck = false;
	int checkType = mCurrentTethers.get(mCurrentTypeIndex);
	if (intent.getIntExtra(EXTRA_RESULT, RESULT_DEFAULT) == RESULT_OK) {
	if (checkType == TetherSettings.WIFI_TETHERING && mEnableWifiAfterCheck) {
	enableWifiTetheringIfNeeded();
	mEnableWifiAfterCheck = false;
	}
	} else {
	switch (checkType) {
	case TetherSettings.WIFI_TETHERING:
	disableWifiTethering();
	break;
	case TetherSettings.BLUETOOTH_TETHERING:
	disableBtTethering();
	break;
	case TetherSettings.USB_TETHERING:
	disableUsbTethering();
	break;
	}
	}
	if (++mCurrentTypeIndex == mCurrentTethers.size()) {
	// We are done with all checks, time to die.
	stopSelf();
	} else {
	// Start the next check in our list.
	startProvisioning(mCurrentTypeIndex);
	}
	}
	}
	};

	}