1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
|
/*
* 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.os.IBinder;
import android.os.SystemClock;
import android.text.TextUtils;
import android.util.Log;
import com.android.settingslib.TetherUtil;
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);
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(TetherUtil.EXTRA_ADD_TETHER_TYPE)) {
int type = intent.getIntExtra(TetherUtil.EXTRA_ADD_TETHER_TYPE,
TetherUtil.TETHERING_INVALID);
if (!mCurrentTethers.contains(type)) {
if (DEBUG) Log.d(TAG, "Adding tether " + type);
mCurrentTethers.add(type);
}
}
if (intent.hasExtra(TetherUtil.EXTRA_REM_TETHER_TYPE)) {
int type = intent.getIntExtra(TetherUtil.EXTRA_REM_TETHER_TYPE,
TetherUtil.TETHERING_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(TetherUtil.EXTRA_SET_ALARM, false)
&& mCurrentTethers.size() == 1) {
scheduleAlarm();
}
if (intent.getBooleanExtra(TetherUtil.EXTRA_ENABLE_WIFI_TETHER, false)) {
mEnableWifiAfterCheck = true;
}
if (intent.getBooleanExtra(TetherUtil.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 (!TetherUtil.isWifiTetherEnabled(this)) {
TetherUtil.setWifiTethering(true, this);
}
}
private void disableWifiTethering() {
TetherUtil.setWifiTethering(false, this);
}
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;
}
public static void scheduleRecheckAlarm(Context context, int type) {
Intent intent = new Intent(context, TetherService.class);
intent.putExtra(TetherUtil.EXTRA_ADD_TETHER_TYPE, type);
intent.putExtra(TetherUtil.EXTRA_SET_ALARM, true);
context.startService(intent);
}
private void scheduleAlarm() {
Intent intent = new Intent(this, TetherService.class);
intent.putExtra(TetherUtil.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(TetherUtil.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 == TetherUtil.TETHERING_WIFI && mEnableWifiAfterCheck) {
enableWifiTetheringIfNeeded();
mEnableWifiAfterCheck = false;
}
} else {
switch (checkType) {
case TetherUtil.TETHERING_WIFI:
disableWifiTethering();
break;
case TetherUtil.TETHERING_BLUETOOTH:
disableBtTethering();
break;
case TetherUtil.TETHERING_USB:
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);
}
}
}
};
}
|