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      1 /*
      2  * Copyright 2015, 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.server.telecom;
     18 
     19 import android.content.Context;
     20 import android.os.Handler;
     21 import android.os.Looper;
     22 import android.telecom.Log;
     23 import android.telecom.Logging.Runnable;
     24 import android.telecom.PhoneAccountHandle;
     25 import android.telephony.TelephonyManager;
     26 
     27 import java.util.Collection;
     28 import java.util.Objects;
     29 
     30 /**
     31  * Registers a timeout for a call and disconnects the call when the timeout expires.
     32  */
     33 final class CreateConnectionTimeout extends Runnable {
     34     private final Context mContext;
     35     private final PhoneAccountRegistrar mPhoneAccountRegistrar;
     36     private final ConnectionServiceWrapper mConnectionService;
     37     private final Call mCall;
     38     private final Handler mHandler = new Handler(Looper.getMainLooper());
     39     private boolean mIsRegistered;
     40     private boolean mIsCallTimedOut;
     41 
     42     CreateConnectionTimeout(Context context, PhoneAccountRegistrar phoneAccountRegistrar,
     43             ConnectionServiceWrapper service, Call call) {
     44         super("CCT", null /*lock*/);
     45         mContext = context;
     46         mPhoneAccountRegistrar = phoneAccountRegistrar;
     47         mConnectionService = service;
     48         mCall = call;
     49     }
     50 
     51     boolean isTimeoutNeededForCall(Collection<PhoneAccountHandle> accounts,
     52             PhoneAccountHandle currentAccount) {
     53         // Non-emergency calls timeout automatically at the radio layer. No need for a timeout here.
     54         if (!mCall.isEmergencyCall()) {
     55             return false;
     56         }
     57 
     58         // If there's no connection manager to fallback on then there's no point in having a
     59         // timeout.
     60         PhoneAccountHandle connectionManager =
     61                 mPhoneAccountRegistrar.getSimCallManagerFromCall(mCall);
     62         if (!accounts.contains(connectionManager)) {
     63             return false;
     64         }
     65 
     66         // No need to add a timeout if the current attempt is over the connection manager.
     67         if (Objects.equals(connectionManager, currentAccount)) {
     68             return false;
     69         }
     70 
     71         // Timeout is only supported for SIM call managers that are set by the carrier.
     72         if (!Objects.equals(connectionManager.getComponentName(),
     73                 mPhoneAccountRegistrar.getSystemSimCallManagerComponent())) {
     74             Log.d(this, "isTimeoutNeededForCall, not a system sim call manager");
     75             return false;
     76         }
     77 
     78         Log.i(this, "isTimeoutNeededForCall, returning true");
     79         return true;
     80     }
     81 
     82     void registerTimeout() {
     83         Log.d(this, "registerTimeout");
     84         mIsRegistered = true;
     85 
     86         long timeoutLengthMillis = getTimeoutLengthMillis();
     87         if (timeoutLengthMillis <= 0) {
     88             Log.d(this, "registerTimeout, timeout set to %d, skipping", timeoutLengthMillis);
     89         } else {
     90             mHandler.postDelayed(prepare(), timeoutLengthMillis);
     91         }
     92     }
     93 
     94     void unregisterTimeout() {
     95         Log.d(this, "unregisterTimeout");
     96         mIsRegistered = false;
     97         mHandler.removeCallbacksAndMessages(null);
     98         cancel();
     99     }
    100 
    101     boolean isCallTimedOut() {
    102         return mIsCallTimedOut;
    103     }
    104 
    105     @Override
    106     public void loggedRun() {
    107         if (mIsRegistered && isCallBeingPlaced(mCall)) {
    108             Log.i(this, "run, call timed out, calling disconnect");
    109             mIsCallTimedOut = true;
    110             mConnectionService.disconnect(mCall);
    111         }
    112     }
    113 
    114     static boolean isCallBeingPlaced(Call call) {
    115         int state = call.getState();
    116         return state == CallState.NEW
    117             || state == CallState.CONNECTING
    118             || state == CallState.DIALING
    119             || state == CallState.PULLING;
    120     }
    121 
    122     private long getTimeoutLengthMillis() {
    123         // If the radio is off then use a longer timeout. This gives us more time to power on the
    124         // radio.
    125         TelephonyManager telephonyManager =
    126             (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
    127         if (telephonyManager.isRadioOn()) {
    128             return Timeouts.getEmergencyCallTimeoutMillis(mContext.getContentResolver());
    129         } else {
    130             return Timeouts.getEmergencyCallTimeoutRadioOffMillis(
    131                     mContext.getContentResolver());
    132         }
    133     }
    134 }
    135