]>
Commit | Line | Data |
---|---|---|
d1220566 TB |
1 | /* |
2 | * Copyright (C) 2012 Tobias Brunner | |
3 | * Hochschule fuer Technik Rapperswil | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation; either version 2 of the License, or (at your | |
8 | * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
12 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 | * for more details. | |
14 | */ | |
15 | ||
16 | package org.strongswan.android.logic; | |
17 | ||
18 | import java.util.ArrayList; | |
19 | import java.util.List; | |
20 | import java.util.concurrent.Callable; | |
21 | ||
22 | import org.strongswan.android.data.VpnProfile; | |
23 | ||
24 | import android.app.Service; | |
25 | import android.content.Intent; | |
26 | import android.os.Binder; | |
27 | import android.os.Handler; | |
28 | import android.os.IBinder; | |
29 | ||
30 | public class VpnStateService extends Service | |
31 | { | |
32 | private final List<VpnStateListener> mListeners = new ArrayList<VpnStateListener>(); | |
33 | private final IBinder mBinder = new LocalBinder(); | |
34 | private Handler mHandler; | |
35 | private VpnProfile mProfile; | |
36 | private State mState = State.DISABLED; | |
37 | private ErrorState mError = ErrorState.NO_ERROR; | |
38 | ||
39 | public enum State | |
40 | { | |
41 | DISABLED, | |
42 | CONNECTING, | |
43 | CONNECTED, | |
44 | DISCONNECTING, | |
45 | } | |
46 | ||
47 | public enum ErrorState | |
48 | { | |
49 | NO_ERROR, | |
50 | AUTH_FAILED, | |
51 | PEER_AUTH_FAILED, | |
52 | LOOKUP_FAILED, | |
53 | UNREACHABLE, | |
54 | GENERIC_ERROR, | |
55 | } | |
56 | ||
57 | /** | |
58 | * Listener interface for bound clients that are interested in changes to | |
59 | * this Service. | |
60 | */ | |
61 | public interface VpnStateListener | |
62 | { | |
63 | public void stateChanged(); | |
64 | } | |
65 | ||
66 | /** | |
67 | * Simple Binder that allows to directly access this Service class itself | |
68 | * after binding to it. | |
69 | */ | |
70 | public class LocalBinder extends Binder | |
71 | { | |
72 | public VpnStateService getService() | |
73 | { | |
74 | return VpnStateService.this; | |
75 | } | |
76 | } | |
77 | ||
78 | @Override | |
79 | public void onCreate() | |
80 | { | |
81 | /* this handler allows us to notify listeners from the UI thread and | |
82 | * not from the threads that actually report any state changes */ | |
83 | mHandler = new Handler(); | |
84 | } | |
85 | ||
86 | @Override | |
87 | public IBinder onBind(Intent intent) | |
88 | { | |
89 | return mBinder; | |
90 | } | |
91 | ||
92 | @Override | |
93 | public void onDestroy() | |
94 | { | |
95 | } | |
96 | ||
97 | /** | |
98 | * Register a listener with this Service. We assume this is called from | |
99 | * the main thread so no synchronization is happening. | |
100 | * | |
101 | * @param listener listener to register | |
102 | */ | |
103 | public void registerListener(VpnStateListener listener) | |
104 | { | |
105 | mListeners.add(listener); | |
106 | } | |
107 | ||
108 | /** | |
109 | * Unregister a listener from this Service. | |
110 | * | |
111 | * @param listener listener to unregister | |
112 | */ | |
113 | public void unregisterListener(VpnStateListener listener) | |
114 | { | |
115 | mListeners.remove(listener); | |
116 | } | |
117 | ||
118 | /** | |
119 | * Get the current VPN profile. | |
120 | * | |
121 | * @return profile | |
122 | */ | |
123 | public VpnProfile getProfile() | |
124 | { /* only updated from the main thread so no synchronization needed */ | |
125 | return mProfile; | |
126 | } | |
127 | ||
128 | /** | |
129 | * Get the current state. | |
130 | * | |
131 | * @return state | |
132 | */ | |
133 | public State getState() | |
134 | { /* only updated from the main thread so no synchronization needed */ | |
135 | return mState; | |
136 | } | |
137 | ||
138 | /** | |
139 | * Get the current error, if any. | |
140 | * | |
141 | * @return error | |
142 | */ | |
143 | public ErrorState getErrorState() | |
144 | { /* only updated from the main thread so no synchronization needed */ | |
145 | return mError; | |
146 | } | |
147 | ||
148 | /** | |
149 | * Update state and notify all listeners about the change. By using a Handler | |
150 | * this is done from the main UI thread and not the initial reporter thread. | |
151 | * Also, in doing the actual state change from the main thread, listeners | |
152 | * see all changes and none are skipped. | |
153 | * | |
154 | * @param change the state update to perform before notifying listeners, returns true if state changed | |
155 | */ | |
156 | private void notifyListeners(final Callable<Boolean> change) | |
157 | { | |
158 | mHandler.post(new Runnable() { | |
159 | @Override | |
160 | public void run() | |
161 | { | |
162 | try | |
163 | { | |
164 | if (change.call()) | |
165 | { /* otherwise there is no need to notify the listeners */ | |
166 | for (VpnStateListener listener : mListeners) | |
167 | { | |
168 | listener.stateChanged(); | |
169 | } | |
170 | } | |
171 | } | |
172 | catch (Exception e) | |
173 | { | |
174 | e.printStackTrace(); | |
175 | } | |
176 | } | |
177 | }); | |
178 | } | |
179 | ||
180 | /** | |
181 | * Set the VPN profile currently active. Listeners are not notified. | |
182 | * | |
183 | * May be called from threads other than the main thread. | |
184 | * | |
185 | * @param profile current profile | |
186 | */ | |
187 | public void setProfile(final VpnProfile profile) | |
188 | { | |
189 | /* even though we don't notify the listeners the update is done from the | |
190 | * same handler so updates are predictable for listeners */ | |
191 | mHandler.post(new Runnable() { | |
192 | @Override | |
193 | public void run() | |
194 | { | |
195 | VpnStateService.this.mProfile = profile; | |
196 | } | |
197 | }); | |
198 | } | |
199 | ||
200 | /** | |
201 | * Update the state and notify all listeners, if changed. | |
202 | * | |
203 | * May be called from threads other than the main thread. | |
204 | * | |
205 | * @param state new state | |
206 | */ | |
207 | public void setState(final State state) | |
208 | { | |
209 | notifyListeners(new Callable<Boolean>() { | |
210 | @Override | |
211 | public Boolean call() throws Exception | |
212 | { | |
213 | if (VpnStateService.this.mState != state) | |
214 | { | |
215 | VpnStateService.this.mState = state; | |
216 | return true; | |
217 | } | |
218 | return false; | |
219 | } | |
220 | }); | |
221 | } | |
222 | ||
223 | /** | |
224 | * Set the current error state and notify all listeners, if changed. | |
225 | * | |
226 | * May be called from threads other than the main thread. | |
227 | * | |
228 | * @param error error state | |
229 | */ | |
230 | public void setError(final ErrorState error) | |
231 | { | |
232 | notifyListeners(new Callable<Boolean>() { | |
233 | @Override | |
234 | public Boolean call() throws Exception | |
235 | { | |
236 | if (VpnStateService.this.mError != error) | |
237 | { | |
238 | VpnStateService.this.mError = error; | |
239 | return true; | |
240 | } | |
241 | return false; | |
242 | } | |
243 | }); | |
244 | } | |
245 | } |