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