1 /*
2  * Copyright (C) 2019 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.net.ipsec.ike;
18 
19 import android.app.AlarmManager;
20 import android.content.Context;
21 import android.net.IpSecManager;
22 import android.net.ipsec.ike.ChildSessionCallback;
23 import android.net.ipsec.ike.ChildSessionParams;
24 import android.os.Looper;
25 
26 import com.android.internal.annotations.VisibleForTesting;
27 import com.android.internal.net.ipsec.ike.ChildSessionStateMachine.IChildSessionSmCallback;
28 import com.android.internal.net.ipsec.ike.utils.IpSecSpiGenerator;
29 import com.android.internal.net.ipsec.ike.utils.RandomnessFactory;
30 
31 import java.util.concurrent.Executor;
32 
33 /** Package private factory for making ChildSessionStateMachine. */
34 // TODO: Make it a inner Creator class of ChildSessionStateMachine
35 final class ChildSessionStateMachineFactory {
36 
37     private static IChildSessionFactoryHelper sChildSessionHelper = new ChildSessionFactoryHelper();
38 
39     /** Package private. */
makeChildSessionStateMachine( Looper looper, Context context, int ikeSessionUniqueId, AlarmManager alarmManager, RandomnessFactory randomFactory, IpSecSpiGenerator ipSecSpiGenerator, ChildSessionParams sessionParams, Executor userCbExecutor, ChildSessionCallback userCallbacks, IChildSessionSmCallback childSmCallback)40     static ChildSessionStateMachine makeChildSessionStateMachine(
41             Looper looper,
42             Context context,
43             int ikeSessionUniqueId,
44             AlarmManager alarmManager,
45             RandomnessFactory randomFactory,
46             IpSecSpiGenerator ipSecSpiGenerator,
47             ChildSessionParams sessionParams,
48             Executor userCbExecutor,
49             ChildSessionCallback userCallbacks,
50             IChildSessionSmCallback childSmCallback) {
51         return sChildSessionHelper.makeChildSessionStateMachine(
52                 looper,
53                 context,
54                 ikeSessionUniqueId,
55                 alarmManager,
56                 randomFactory,
57                 ipSecSpiGenerator,
58                 sessionParams,
59                 userCbExecutor,
60                 userCallbacks,
61                 childSmCallback);
62     }
63 
64     @VisibleForTesting
setChildSessionFactoryHelper(IChildSessionFactoryHelper helper)65     static void setChildSessionFactoryHelper(IChildSessionFactoryHelper helper) {
66         sChildSessionHelper = helper;
67     }
68 
69     /**
70      * IChildSessionFactoryHelper provides a package private interface for constructing
71      * ChildSessionStateMachine.
72      *
73      * <p>IChildSessionFactoryHelper exists so that the interface is injectable for testing.
74      */
75     interface IChildSessionFactoryHelper {
makeChildSessionStateMachine( Looper looper, Context context, int ikeSessionUniqueId, AlarmManager alarmManager, RandomnessFactory randomFactory, IpSecSpiGenerator ipSecSpiGenerator, ChildSessionParams sessionParams, Executor userCbExecutor, ChildSessionCallback userCallbacks, IChildSessionSmCallback childSmCallback)76         ChildSessionStateMachine makeChildSessionStateMachine(
77                 Looper looper,
78                 Context context,
79                 int ikeSessionUniqueId,
80                 AlarmManager alarmManager,
81                 RandomnessFactory randomFactory,
82                 IpSecSpiGenerator ipSecSpiGenerator,
83                 ChildSessionParams sessionParams,
84                 Executor userCbExecutor,
85                 ChildSessionCallback userCallbacks,
86                 IChildSessionSmCallback childSmCallback);
87     }
88 
89     /**
90      * ChildSessionFactoryHelper implements a method for constructing ChildSessionStateMachine.
91      *
92      * <p>Package private.
93      */
94     static class ChildSessionFactoryHelper implements IChildSessionFactoryHelper {
makeChildSessionStateMachine( Looper looper, Context context, int ikeSessionUniqueId, AlarmManager alarmManager, RandomnessFactory randomFactory, IpSecSpiGenerator ipSecSpiGenerator, ChildSessionParams sessionParams, Executor userCbExecutor, ChildSessionCallback userCallbacks, IChildSessionSmCallback childSmCallback)95         public ChildSessionStateMachine makeChildSessionStateMachine(
96                 Looper looper,
97                 Context context,
98                 int ikeSessionUniqueId,
99                 AlarmManager alarmManager,
100                 RandomnessFactory randomFactory,
101                 IpSecSpiGenerator ipSecSpiGenerator,
102                 ChildSessionParams sessionParams,
103                 Executor userCbExecutor,
104                 ChildSessionCallback userCallbacks,
105                 IChildSessionSmCallback childSmCallback) {
106             ChildSessionStateMachine childSession =
107                     new ChildSessionStateMachine(
108                             looper,
109                             context,
110                             ikeSessionUniqueId,
111                             alarmManager,
112                             randomFactory,
113                             (IpSecManager) context.getSystemService(Context.IPSEC_SERVICE),
114                             ipSecSpiGenerator,
115                             sessionParams,
116                             userCbExecutor,
117                             userCallbacks,
118                             childSmCallback);
119             childSession.start();
120             return childSession;
121         }
122     }
123 }
124