| /* |
| * 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.app.IntentService; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.SharedPreferences; |
| import android.content.res.Resources; |
| import android.os.SystemProperties; |
| import android.preference.PreferenceManager; |
| import android.telephony.CellBroadcastMessage; |
| import android.telephony.SmsManager; |
| import android.telephony.TelephonyManager; |
| import android.text.TextUtils; |
| import android.util.Log; |
| |
| import com.android.internal.telephony.cdma.sms.SmsEnvelope; |
| import com.android.internal.telephony.gsm.SmsCbConstants; |
| |
| import static com.android.cellbroadcastreceiver.CellBroadcastReceiver.DBG; |
| |
| /** |
| * This service manages enabling and disabling ranges of message identifiers |
| * that the radio should listen for. It operates independently of the other |
| * services and runs at boot time and after exiting airplane mode. |
| * |
| * Note that the entire range of emergency channels is enabled. Test messages |
| * and lower priority broadcasts are filtered out in CellBroadcastAlertService |
| * if the user has not enabled them in settings. |
| * |
| * TODO: add notification to re-enable channels after a radio reset. |
| */ |
| public class CellBroadcastConfigService extends IntentService { |
| private static final String TAG = "CellBroadcastConfigService"; |
| |
| static final String ACTION_ENABLE_CHANNELS = "ACTION_ENABLE_CHANNELS"; |
| |
| static final String EMERGENCY_BROADCAST_RANGE_GSM = |
| "ro.cb.gsm.emergencyids"; |
| |
| public CellBroadcastConfigService() { |
| super(TAG); // use class name for worker thread name |
| } |
| |
| private static void setChannelRange(SmsManager manager, String ranges, boolean enable) { |
| if (DBG)log("setChannelRange: " + ranges); |
| |
| try { |
| for (String channelRange : ranges.split(",")) { |
| int dashIndex = channelRange.indexOf('-'); |
| if (dashIndex != -1) { |
| int startId = Integer.decode(channelRange.substring(0, dashIndex).trim()); |
| int endId = Integer.decode(channelRange.substring(dashIndex + 1).trim()); |
| if (enable) { |
| if (DBG) log("enabling emergency IDs " + startId + '-' + endId); |
| manager.enableCellBroadcastRange(startId, endId); |
| } else { |
| if (DBG) log("disabling emergency IDs " + startId + '-' + endId); |
| manager.disableCellBroadcastRange(startId, endId); |
| } |
| } else { |
| int messageId = Integer.decode(channelRange.trim()); |
| if (enable) { |
| if (DBG) log("enabling emergency message ID " + messageId); |
| manager.enableCellBroadcast(messageId); |
| } else { |
| if (DBG) log("disabling emergency message ID " + messageId); |
| manager.disableCellBroadcast(messageId); |
| } |
| } |
| } |
| } catch (NumberFormatException e) { |
| Log.e(TAG, "Number Format Exception parsing emergency channel range", e); |
| } |
| |
| // Make sure CMAS Presidential is enabled (See 3GPP TS 22.268 Section 6.2). |
| if (DBG) log("setChannelRange: enabling CMAS Presidential"); |
| if (CellBroadcastReceiver.phoneIsCdma()) { |
| manager.enableCellBroadcast(SmsEnvelope.SERVICE_CATEGORY_CMAS_PRESIDENTIAL_LEVEL_ALERT); |
| } else { |
| manager.enableCellBroadcast(SmsCbConstants.MESSAGE_ID_CMAS_ALERT_PRESIDENTIAL_LEVEL); |
| } |
| } |
| |
| /** |
| * Returns true if this is a standard or operator-defined emergency alert message. |
| * This includes all ETWS and CMAS alerts, except for AMBER alerts. |
| * @param message the message to test |
| * @return true if the message is an emergency alert; false otherwise |
| */ |
| static boolean isEmergencyAlertMessage(CellBroadcastMessage message) { |
| if (message.isEmergencyAlertMessage()) { |
| return true; |
| } |
| |
| // Check for system property defining the emergency channel ranges to enable |
| String emergencyIdRange = (CellBroadcastReceiver.phoneIsCdma()) ? |
| "" : SystemProperties.get(EMERGENCY_BROADCAST_RANGE_GSM); |
| |
| if (TextUtils.isEmpty(emergencyIdRange)) { |
| return false; |
| } |
| try { |
| int messageId = message.getServiceCategory(); |
| for (String channelRange : emergencyIdRange.split(",")) { |
| int dashIndex = channelRange.indexOf('-'); |
| if (dashIndex != -1) { |
| int startId = Integer.decode(channelRange.substring(0, dashIndex).trim()); |
| int endId = Integer.decode(channelRange.substring(dashIndex + 1).trim()); |
| if (messageId >= startId && messageId <= endId) { |
| return true; |
| } |
| } else { |
| int emergencyMessageId = Integer.decode(channelRange.trim()); |
| if (emergencyMessageId == messageId) { |
| return true; |
| } |
| } |
| } |
| } catch (NumberFormatException e) { |
| Log.e(TAG, "Number Format Exception parsing emergency channel range", e); |
| } |
| return false; |
| } |
| |
| @Override |
| protected void onHandleIntent(Intent intent) { |
| if (ACTION_ENABLE_CHANNELS.equals(intent.getAction())) { |
| try { |
| SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); |
| Resources res = getResources(); |
| |
| // boolean for each user preference checkbox, true for checked, false for unchecked |
| // Note: If enableEmergencyAlerts is false, it disables ALL emergency broadcasts |
| // except for cmas presidential. i.e. to receive cmas severe alerts, both |
| // enableEmergencyAlerts AND enableCmasSevereAlerts must be true. |
| boolean enableEmergencyAlerts = prefs.getBoolean( |
| CellBroadcastSettings.KEY_ENABLE_EMERGENCY_ALERTS, true); |
| |
| TelephonyManager tm = (TelephonyManager) getSystemService( |
| Context.TELEPHONY_SERVICE); |
| |
| boolean enableChannel50Support = res.getBoolean(R.bool.show_brazil_settings) || |
| "br".equals(tm.getSimCountryIso()); |
| |
| boolean enableChannel50Alerts = enableChannel50Support && |
| prefs.getBoolean(CellBroadcastSettings.KEY_ENABLE_CHANNEL_50_ALERTS, true); |
| |
| // Note: ETWS is for 3GPP only |
| boolean enableEtwsTestAlerts = prefs.getBoolean( |
| CellBroadcastSettings.KEY_ENABLE_ETWS_TEST_ALERTS, false); |
| |
| boolean enableCmasExtremeAlerts = prefs.getBoolean( |
| CellBroadcastSettings.KEY_ENABLE_CMAS_EXTREME_THREAT_ALERTS, true); |
| |
| boolean enableCmasSevereAlerts = prefs.getBoolean( |
| CellBroadcastSettings.KEY_ENABLE_CMAS_SEVERE_THREAT_ALERTS, true); |
| |
| boolean enableCmasAmberAlerts = prefs.getBoolean( |
| CellBroadcastSettings.KEY_ENABLE_CMAS_AMBER_ALERTS, true); |
| |
| boolean enableCmasTestAlerts = prefs.getBoolean( |
| CellBroadcastSettings.KEY_ENABLE_CMAS_TEST_ALERTS, false); |
| |
| // set up broadcast ID ranges to be used for each category |
| int cmasExtremeStart = |
| SmsCbConstants.MESSAGE_ID_CMAS_ALERT_EXTREME_IMMEDIATE_OBSERVED; |
| int cmasExtremeEnd = SmsCbConstants.MESSAGE_ID_CMAS_ALERT_EXTREME_IMMEDIATE_LIKELY; |
| int cmasSevereStart = |
| SmsCbConstants.MESSAGE_ID_CMAS_ALERT_EXTREME_EXPECTED_OBSERVED; |
| int cmasSevereEnd = SmsCbConstants.MESSAGE_ID_CMAS_ALERT_SEVERE_EXPECTED_LIKELY; |
| int cmasAmber = SmsCbConstants.MESSAGE_ID_CMAS_ALERT_CHILD_ABDUCTION_EMERGENCY; |
| int cmasTestStart = SmsCbConstants.MESSAGE_ID_CMAS_ALERT_REQUIRED_MONTHLY_TEST; |
| int cmasTestEnd = SmsCbConstants.MESSAGE_ID_CMAS_ALERT_OPERATOR_DEFINED_USE; |
| int cmasPresident = SmsCbConstants.MESSAGE_ID_CMAS_ALERT_PRESIDENTIAL_LEVEL; |
| |
| // set to CDMA broadcast ID rage if phone is in CDMA mode. |
| boolean isCdma = CellBroadcastReceiver.phoneIsCdma(); |
| if (isCdma) { |
| cmasExtremeStart = SmsEnvelope.SERVICE_CATEGORY_CMAS_EXTREME_THREAT; |
| cmasExtremeEnd = cmasExtremeStart; |
| cmasSevereStart = SmsEnvelope.SERVICE_CATEGORY_CMAS_SEVERE_THREAT; |
| cmasSevereEnd = cmasSevereStart; |
| cmasAmber = SmsEnvelope.SERVICE_CATEGORY_CMAS_CHILD_ABDUCTION_EMERGENCY; |
| cmasTestStart = SmsEnvelope.SERVICE_CATEGORY_CMAS_TEST_MESSAGE; |
| cmasTestEnd = cmasTestStart; |
| cmasPresident = SmsEnvelope.SERVICE_CATEGORY_CMAS_PRESIDENTIAL_LEVEL_ALERT; |
| } |
| |
| SmsManager manager = SmsManager.getDefault(); |
| // Check for system property defining the emergency channel ranges to enable |
| String emergencyIdRange = isCdma ? |
| "" : SystemProperties.get(EMERGENCY_BROADCAST_RANGE_GSM); |
| if (enableEmergencyAlerts) { |
| if (DBG) log("enabling emergency cell broadcast channels"); |
| if (!TextUtils.isEmpty(emergencyIdRange)) { |
| setChannelRange(manager, emergencyIdRange, true); |
| } else { |
| // No emergency channel system property, enable all emergency channels |
| // that have checkbox checked |
| if (!isCdma) { |
| manager.enableCellBroadcastRange( |
| SmsCbConstants.MESSAGE_ID_ETWS_EARTHQUAKE_WARNING, |
| SmsCbConstants.MESSAGE_ID_ETWS_EARTHQUAKE_AND_TSUNAMI_WARNING); |
| if (enableEtwsTestAlerts) { |
| manager.enableCellBroadcast( |
| SmsCbConstants.MESSAGE_ID_ETWS_TEST_MESSAGE); |
| } |
| manager.enableCellBroadcast( |
| SmsCbConstants.MESSAGE_ID_ETWS_OTHER_EMERGENCY_TYPE); |
| } |
| if (enableCmasExtremeAlerts) { |
| manager.enableCellBroadcastRange(cmasExtremeStart, cmasExtremeEnd); |
| } |
| if (enableCmasSevereAlerts) { |
| manager.enableCellBroadcastRange(cmasSevereStart, cmasSevereEnd); |
| } |
| if (enableCmasAmberAlerts) { |
| manager.enableCellBroadcast(cmasAmber); |
| } |
| if (enableCmasTestAlerts) { |
| manager.enableCellBroadcastRange(cmasTestStart, cmasTestEnd); |
| } |
| // CMAS Presidential must be on (See 3GPP TS 22.268 Section 6.2). |
| manager.enableCellBroadcast(cmasPresident); |
| } |
| if (DBG) log("enabled emergency cell broadcast channels"); |
| } else { |
| // we may have enabled these channels previously, so try to disable them |
| if (DBG) log("disabling emergency cell broadcast channels"); |
| if (!TextUtils.isEmpty(emergencyIdRange)) { |
| setChannelRange(manager, emergencyIdRange, false); |
| } else { |
| // No emergency channel system property, disable all emergency channels |
| // except for CMAS Presidential (See 3GPP TS 22.268 Section 6.2) |
| if (!isCdma) { |
| manager.disableCellBroadcastRange( |
| SmsCbConstants.MESSAGE_ID_ETWS_EARTHQUAKE_WARNING, |
| SmsCbConstants.MESSAGE_ID_ETWS_EARTHQUAKE_AND_TSUNAMI_WARNING); |
| manager.disableCellBroadcast( |
| SmsCbConstants.MESSAGE_ID_ETWS_TEST_MESSAGE); |
| manager.disableCellBroadcast( |
| SmsCbConstants.MESSAGE_ID_ETWS_OTHER_EMERGENCY_TYPE); |
| } |
| manager.disableCellBroadcastRange(cmasExtremeStart, cmasExtremeEnd); |
| manager.disableCellBroadcastRange(cmasSevereStart, cmasSevereEnd); |
| manager.disableCellBroadcast(cmasAmber); |
| manager.disableCellBroadcastRange(cmasTestStart, cmasTestEnd); |
| |
| // CMAS Presidential must be on (See 3GPP TS 22.268 Section 6.2). |
| manager.enableCellBroadcast(cmasPresident); |
| } |
| if (DBG) log("disabled emergency cell broadcast channels"); |
| } |
| |
| if (isCdma) { |
| if (DBG) log("channel 50 is not aplicable for cdma"); |
| } else if (enableChannel50Alerts) { |
| if (DBG) log("enabling cell broadcast channel 50"); |
| manager.enableCellBroadcast(50); |
| if (DBG) log("enabled cell broadcast channel 50"); |
| } else { |
| if (DBG) log("disabling cell broadcast channel 50"); |
| manager.disableCellBroadcast(50); |
| if (DBG) log("disabled cell broadcast channel 50"); |
| } |
| |
| // Disable per user preference/checkbox. |
| // This takes care of the case where enableEmergencyAlerts is true, |
| // but check box is unchecked to receive such as cmas severe alerts. |
| if (!enableEtwsTestAlerts && !isCdma) { |
| if (DBG) Log.d(TAG, "disabling cell broadcast ETWS test messages"); |
| manager.disableCellBroadcast( |
| SmsCbConstants.MESSAGE_ID_ETWS_TEST_MESSAGE); |
| } |
| if (!enableCmasExtremeAlerts) { |
| if (DBG) Log.d(TAG, "disabling cell broadcast CMAS extreme"); |
| manager.disableCellBroadcastRange(cmasExtremeStart, cmasExtremeEnd); |
| } |
| if (!enableCmasSevereAlerts) { |
| if (DBG) Log.d(TAG, "disabling cell broadcast CMAS severe"); |
| manager.disableCellBroadcastRange(cmasSevereStart, cmasSevereEnd); |
| } |
| if (!enableCmasAmberAlerts) { |
| if (DBG) Log.d(TAG, "disabling cell broadcast CMAS amber"); |
| manager.disableCellBroadcast(cmasAmber); |
| } |
| if (!enableCmasTestAlerts) { |
| if (DBG) Log.d(TAG, "disabling cell broadcast CMAS test messages"); |
| manager.disableCellBroadcastRange(cmasTestStart, cmasTestEnd); |
| } |
| } catch (Exception ex) { |
| Log.e(TAG, "exception enabling cell broadcast channels", ex); |
| } |
| } |
| } |
| |
| private static void log(String msg) { |
| Log.d(TAG, msg); |
| } |
| } |
