CreateConnectionTimeout.java revision 1e37be5dd86a51b90e461f09dc8a89effe4aee21 
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
17package com.android.server.telecom;
18
19import android.content.Context;
20import android.os.Handler;
21import android.os.Looper;
22import android.os.UserHandle;
23import android.telecom.PhoneAccountHandle;
24import android.telephony.TelephonyManager;
25
26import java.util.Collection;
27import java.util.Objects;
28
29/**
30 * Registers a timeout for a call and disconnects the call when the timeout expires.
31 */
32final 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
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
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
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
93    void unregisterTimeout() {
94        Log.d(this, "unregisterTimeout");
95        mIsRegistered = false;
96        mHandler.removeCallbacksAndMessages(null);
97        cancel();
98    }
99
100    boolean isCallTimedOut() {
101        return mIsCallTimedOut;
102    }
103
104    @Override
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
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            || state == CallState.PULLING;
119    }
120
121    private long getTimeoutLengthMillis() {
122        // If the radio is off then use a longer timeout. This gives us more time to power on the
123        // radio.
124        TelephonyManager telephonyManager =
125            (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
126        if (telephonyManager.isRadioOn()) {
127            return Timeouts.getEmergencyCallTimeoutMillis(mContext.getContentResolver());
128        } else {
129            return Timeouts.getEmergencyCallTimeoutRadioOffMillis(
130                    mContext.getContentResolver());
131        }
132    }
133}
134