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
|
/*
* Copyright (C) 2011 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.cellbroadcastreceiver;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.UserHandle;
import android.preference.PreferenceManager;
import android.provider.Telephony;
import android.telephony.CellBroadcastMessage;
import android.telephony.PhoneStateListener;
import android.telephony.ServiceState;
import android.telephony.TelephonyManager;
import android.telephony.cdma.CdmaSmsCbProgramData;
import android.util.Log;
import com.android.internal.telephony.ITelephony;
import com.android.internal.telephony.cdma.sms.SmsEnvelope;
public class CellBroadcastReceiver extends BroadcastReceiver {
private static final String TAG = "CellBroadcastReceiver";
static final boolean DBG = true; // STOPSHIP: change to false before ship
private static final String GET_LATEST_CB_AREA_INFO_ACTION =
"android.cellbroadcastreceiver.GET_LATEST_CB_AREA_INFO";
@Override
public void onReceive(Context context, Intent intent) {
onReceiveWithPrivilege(context, intent, false);
}
protected void onReceiveWithPrivilege(Context context, Intent intent, boolean privileged) {
if (DBG) log("onReceive " + intent);
String action = intent.getAction();
if (Intent.ACTION_BOOT_COMPLETED.equals(action)) {
if (DBG) log("Registering for ServiceState updates");
TelephonyManager tm = (TelephonyManager) context.getSystemService(
Context.TELEPHONY_SERVICE);
tm.listen(new ServiceStateListener(context.getApplicationContext()),
PhoneStateListener.LISTEN_SERVICE_STATE);
} else if (Intent.ACTION_AIRPLANE_MODE_CHANGED.equals(action)) {
boolean airplaneModeOn = intent.getBooleanExtra("state", false);
if (DBG) log("airplaneModeOn: " + airplaneModeOn);
if (!airplaneModeOn) {
startConfigService(context);
}
} else if (Telephony.Sms.Intents.SMS_EMERGENCY_CB_RECEIVED_ACTION.equals(action) ||
Telephony.Sms.Intents.SMS_CB_RECEIVED_ACTION.equals(action)) {
// If 'privileged' is false, it means that the intent was delivered to the base
// no-permissions receiver class. If we get an SMS_CB_RECEIVED message that way, it
// means someone has tried to spoof the message by delivering it outside the normal
// permission-checked route, so we just ignore it.
if (privileged) {
intent.setClass(context, CellBroadcastAlertService.class);
context.startService(intent);
} else {
loge("ignoring unprivileged action received " + action);
}
} else if (Telephony.Sms.Intents.SMS_SERVICE_CATEGORY_PROGRAM_DATA_RECEIVED_ACTION
.equals(action)) {
if (privileged) {
CdmaSmsCbProgramData[] programDataList = (CdmaSmsCbProgramData[])
intent.getParcelableArrayExtra("program_data_list");
if (programDataList != null) {
handleCdmaSmsCbProgramData(context, programDataList);
} else {
loge("SCPD intent received with no program_data_list");
}
} else {
loge("ignoring unprivileged action received " + action);
}
} else if (GET_LATEST_CB_AREA_INFO_ACTION.equals(action)) {
if (privileged) {
CellBroadcastMessage message = CellBroadcastReceiverApp.getLatestAreaInfo();
if (message != null) {
Intent areaInfoIntent = new Intent(
CellBroadcastAlertService.CB_AREA_INFO_RECEIVED_ACTION);
areaInfoIntent.putExtra("message", message);
context.sendBroadcastAsUser(areaInfoIntent, UserHandle.ALL,
android.Manifest.permission.READ_PHONE_STATE);
}
} else {
Log.e(TAG, "caller missing READ_PHONE_STATE permission, returning");
}
} else {
Log.w(TAG, "onReceive() unexpected action " + action);
}
}
/**
* Handle Service Category Program Data message.
* TODO: Send Service Category Program Results response message to sender
*
* @param context
* @param programDataList
*/
private void handleCdmaSmsCbProgramData(Context context,
CdmaSmsCbProgramData[] programDataList) {
for (CdmaSmsCbProgramData programData : programDataList) {
switch (programData.getOperation()) {
case CdmaSmsCbProgramData.OPERATION_ADD_CATEGORY:
tryCdmaSetCategory(context, programData.getCategory(), true);
break;
case CdmaSmsCbProgramData.OPERATION_DELETE_CATEGORY:
tryCdmaSetCategory(context, programData.getCategory(), false);
break;
case CdmaSmsCbProgramData.OPERATION_CLEAR_CATEGORIES:
tryCdmaSetCategory(context,
SmsEnvelope.SERVICE_CATEGORY_CMAS_EXTREME_THREAT, false);
tryCdmaSetCategory(context,
SmsEnvelope.SERVICE_CATEGORY_CMAS_SEVERE_THREAT, false);
tryCdmaSetCategory(context,
SmsEnvelope.SERVICE_CATEGORY_CMAS_CHILD_ABDUCTION_EMERGENCY, false);
tryCdmaSetCategory(context,
SmsEnvelope.SERVICE_CATEGORY_CMAS_TEST_MESSAGE, false);
break;
default:
loge("Ignoring unknown SCPD operation " + programData.getOperation());
}
}
}
private void tryCdmaSetCategory(Context context, int category, boolean enable) {
SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
switch (category) {
case SmsEnvelope.SERVICE_CATEGORY_CMAS_EXTREME_THREAT:
sharedPrefs.edit().putBoolean(
CellBroadcastSettings.KEY_ENABLE_CMAS_EXTREME_THREAT_ALERTS, enable)
.apply();
break;
case SmsEnvelope.SERVICE_CATEGORY_CMAS_SEVERE_THREAT:
sharedPrefs.edit().putBoolean(
CellBroadcastSettings.KEY_ENABLE_CMAS_SEVERE_THREAT_ALERTS, enable)
.apply();
break;
case SmsEnvelope.SERVICE_CATEGORY_CMAS_CHILD_ABDUCTION_EMERGENCY:
sharedPrefs.edit().putBoolean(
CellBroadcastSettings.KEY_ENABLE_CMAS_AMBER_ALERTS, enable).apply();
break;
case SmsEnvelope.SERVICE_CATEGORY_CMAS_TEST_MESSAGE:
sharedPrefs.edit().putBoolean(
CellBroadcastSettings.KEY_ENABLE_CMAS_TEST_ALERTS, enable).apply();
break;
default:
Log.w(TAG, "Ignoring SCPD command to " + (enable ? "enable" : "disable")
+ " alerts in category " + category);
}
}
/**
* Tell {@link CellBroadcastConfigService} to enable the CB channels.
* @param context the broadcast receiver context
*/
static void startConfigService(Context context) {
Intent serviceIntent = new Intent(CellBroadcastConfigService.ACTION_ENABLE_CHANNELS,
null, context, CellBroadcastConfigService.class);
context.startService(serviceIntent);
}
/**
* @return true if the phone is a CDMA phone type
*/
static boolean phoneIsCdma() {
boolean isCdma = false;
try {
ITelephony phone = ITelephony.Stub.asInterface(ServiceManager.checkService("phone"));
if (phone != null) {
isCdma = (phone.getActivePhoneType() == TelephonyManager.PHONE_TYPE_CDMA);
}
} catch (RemoteException e) {
Log.w(TAG, "phone.getActivePhoneType() failed", e);
}
return isCdma;
}
private static class ServiceStateListener extends PhoneStateListener {
private final Context mContext;
private int mServiceState = -1;
ServiceStateListener(Context context) {
mContext = context;
}
@Override
public void onServiceStateChanged(ServiceState ss) {
int newState = ss.getState();
if (newState != mServiceState) {
Log.d(TAG, "Service state changed! " + newState + " Full: " + ss);
mServiceState = newState;
if (newState == ServiceState.STATE_IN_SERVICE ||
newState == ServiceState.STATE_EMERGENCY_ONLY) {
startConfigService(mContext);
}
}
}
}
private static void log(String msg) {
Log.d(TAG, msg);
}
private static void loge(String msg) {
Log.e(TAG, msg);
}
}
|
