1 /* 2 * Copyright (C) 2022 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.internal.telephony.emergency; 18 19 import android.content.Context; 20 import android.content.Intent; 21 import android.os.UserHandle; 22 import android.provider.Settings; 23 import android.telephony.TelephonyManager; 24 25 import com.android.internal.telephony.IIntegerConsumer; 26 import com.android.internal.telephony.Phone; 27 import com.android.internal.telephony.PhoneFactory; 28 import com.android.internal.telephony.satellite.SatelliteController; 29 import com.android.telephony.Rlog; 30 31 import java.util.ArrayList; 32 import java.util.List; 33 34 /** 35 * Helper class that implements special behavior related to emergency calls or making phone calls 36 * when the radio is in the POWER_OFF STATE. Specifically, this class handles the case of the user 37 * trying to dial an emergency number while the radio is off (i.e. the device is in airplane mode) 38 * or a normal number while the radio is off (because of the device is on Bluetooth), by turning the 39 * radio back on, waiting for it to come up, and then retrying the call. 40 */ 41 public class RadioOnHelper implements RadioOnStateListener.Callback { 42 43 private static final String TAG = "RadioOnStateListener"; 44 45 private final Context mContext; 46 private RadioOnStateListener.Callback mCallback; 47 private List<RadioOnStateListener> mListeners; 48 private List<RadioOnStateListener> mInProgressListeners; 49 private boolean mIsRadioReady; 50 RadioOnHelper(Context context)51 public RadioOnHelper(Context context) { 52 mContext = context; 53 mInProgressListeners = new ArrayList<>(2); 54 } 55 setupListeners()56 private void setupListeners() { 57 if (mListeners == null) { 58 mListeners = new ArrayList<>(2); 59 } 60 int activeModems = TelephonyManager.from(mContext).getActiveModemCount(); 61 // Add new listeners if active modem count increased. 62 while (mListeners.size() < activeModems) { 63 mListeners.add(new RadioOnStateListener()); 64 } 65 // Clean up listeners if active modem count decreased. 66 while (mListeners.size() > activeModems) { 67 mListeners.get(mListeners.size() - 1).cleanup(); 68 mListeners.remove(mListeners.size() - 1); 69 } 70 } 71 72 /** 73 * Starts the "turn on radio" sequence. This is the (single) external API of the RadioOnHelper 74 * class. 75 * 76 * This method kicks off the following sequence: 77 * - Power on the radio for each Phone and disable the satellite modem 78 * - Listen for events telling us the radio has come up or the satellite modem is disabled. 79 * - Retry if we've gone a significant amount of time without any response. 80 * - Finally, clean up any leftover state. 81 * 82 * This method is safe to call from any thread, since it simply posts a message to the 83 * RadioOnHelper's handler (thus ensuring that the rest of the sequence is entirely serialized, 84 * and runs on the main looper.) 85 */ triggerRadioOnAndListen(RadioOnStateListener.Callback callback, boolean forEmergencyCall, Phone phoneForEmergencyCall, boolean isTestEmergencyNumber, int emergencyTimeoutIntervalMillis)86 public void triggerRadioOnAndListen(RadioOnStateListener.Callback callback, 87 boolean forEmergencyCall, Phone phoneForEmergencyCall, boolean isTestEmergencyNumber, 88 int emergencyTimeoutIntervalMillis) { 89 setupListeners(); 90 mCallback = callback; 91 mInProgressListeners.clear(); 92 mIsRadioReady = false; 93 for (int i = 0; i < TelephonyManager.from(mContext).getActiveModemCount(); i++) { 94 Phone phone = PhoneFactory.getPhone(i); 95 if (phone == null) { 96 continue; 97 } 98 99 int timeoutCallbackInterval = (phone == phoneForEmergencyCall) 100 ? emergencyTimeoutIntervalMillis : 0; 101 mInProgressListeners.add(mListeners.get(i)); 102 mListeners.get(i).waitForRadioOn(phone, this, forEmergencyCall, forEmergencyCall 103 && phone == phoneForEmergencyCall, timeoutCallbackInterval); 104 } 105 powerOnRadio(forEmergencyCall, phoneForEmergencyCall, isTestEmergencyNumber); 106 if (SatelliteController.getInstance().isSatelliteEnabledOrBeingEnabled()) { 107 powerOffSatellite(); 108 } 109 } 110 111 /** 112 * Attempt to power on the radio (i.e. take the device out of airplane mode). We'll eventually 113 * get an onServiceStateChanged() callback when the radio successfully comes up. 114 */ powerOnRadio(boolean forEmergencyCall, Phone phoneForEmergencyCall, boolean isTestEmergencyNumber)115 private void powerOnRadio(boolean forEmergencyCall, Phone phoneForEmergencyCall, 116 boolean isTestEmergencyNumber) { 117 118 // Always try to turn on the radio here independent of APM setting - if we got here in the 119 // first place, the radio is off independent of APM setting. 120 for (Phone phone : PhoneFactory.getPhones()) { 121 Rlog.d(TAG, "powerOnRadio, enabling Radio"); 122 if (isTestEmergencyNumber) { 123 phone.setRadioPowerOnForTestEmergencyCall(phone == phoneForEmergencyCall); 124 } else { 125 phone.setRadioPower(true, forEmergencyCall, phone == phoneForEmergencyCall, 126 false); 127 } 128 } 129 130 // If airplane mode is on, we turn it off the same way that the Settings activity turns it 131 // off to keep the setting in sync. 132 if (Settings.Global.getInt(mContext.getContentResolver(), 133 Settings.Global.AIRPLANE_MODE_ON, 0) > 0) { 134 Rlog.d(TAG, "==> Turning off airplane mode for emergency call."); 135 136 // Change the system setting 137 Settings.Global.putInt(mContext.getContentResolver(), 138 Settings.Global.AIRPLANE_MODE_ON, 0); 139 140 // Post the broadcast intend for change in airplane mode TODO: We really should not be 141 // in charge of sending this broadcast. If changing the setting is sufficient to trigger 142 // all of the rest of the logic, then that should also trigger the broadcast intent. 143 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 144 intent.putExtra("state", false); 145 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 146 } 147 } 148 149 /** 150 * Attempt to power off the satellite modem. We'll eventually get an 151 * onSatelliteModemStateChanged() callback when the satellite modem is successfully disabled. 152 */ powerOffSatellite()153 private void powerOffSatellite() { 154 SatelliteController satelliteController = SatelliteController.getInstance(); 155 satelliteController.requestSatelliteEnabled( 156 false /* enableSatellite */, false /* enableDemoMode */, false /* isEmergency */, 157 new IIntegerConsumer.Stub() { 158 @Override 159 public void accept(int result) { 160 161 } 162 }); 163 } 164 165 /** 166 * This method is called from multiple Listeners on the Main Looper. Synchronization is not 167 * necessary. 168 */ 169 @Override onComplete(RadioOnStateListener listener, boolean isRadioReady)170 public void onComplete(RadioOnStateListener listener, boolean isRadioReady) { 171 mIsRadioReady |= isRadioReady; 172 mInProgressListeners.remove(listener); 173 if (mCallback != null && mInProgressListeners.isEmpty()) { 174 mCallback.onComplete(null, mIsRadioReady); 175 } 176 } 177 178 @Override isOkToCall(Phone phone, int serviceState, boolean imsVoiceCapable)179 public boolean isOkToCall(Phone phone, int serviceState, boolean imsVoiceCapable) { 180 return (mCallback == null) 181 ? false : mCallback.isOkToCall(phone, serviceState, imsVoiceCapable); 182 } 183 184 @Override onTimeout(Phone phone, int serviceState, boolean imsVoiceCapable)185 public boolean onTimeout(Phone phone, int serviceState, boolean imsVoiceCapable) { 186 return (mCallback == null) 187 ? false : mCallback.onTimeout(phone, serviceState, imsVoiceCapable); 188 } 189 } 190