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/*
* 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.os.RemoteException;
import android.os.ServiceManager;
import android.preference.PreferenceManager;
import android.provider.Telephony;
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
@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)) {
startConfigService(context);
} else if (Intent.ACTION_AIRPLANE_MODE_CHANGED.equals(action)) {
boolean airplaneModeOn = intent.getBooleanExtra("state", false);
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 {
Log.e(TAG, "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 {
Log.e(TAG, "SCPD intent received with no program_data_list");
}
} else {
Log.e(TAG, "ignoring unprivileged action received " + action);
}
} 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:
Log.e(TAG, "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) {
if (phoneIsCdma()) {
if (DBG) log("CDMA phone detected; doing nothing");
} else {
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
*/
private 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 void log(String msg) {
Log.d(TAG, msg);
}
}
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