1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
package de.blinkt.openvpn.core;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.NetworkInfo.State;
import android.preference.PreferenceManager;
import se.leap.bitmaskclient.R;
import de.blinkt.openvpn.core.VpnStatus.ByteCountListener;
import java.util.LinkedList;
import static de.blinkt.openvpn.core.OpenVPNManagement.pauseReason;
public class DeviceStateReceiver extends BroadcastReceiver implements ByteCountListener {
private int lastNetwork = -1;
private OpenVPNManagement mManagement;
// Window time in s
private final int TRAFFIC_WINDOW = 60;
// Data traffic limit in bytes
private final long TRAFFIC_LIMIT = 64 * 1024;
connectState network = connectState.DISCONNECTED;
connectState screen = connectState.SHOULDBECONNECTED;
connectState userpause = connectState.SHOULDBECONNECTED;
private String lastStateMsg = null;
enum connectState {
SHOULDBECONNECTED,
PENDINGDISCONNECT,
DISCONNECTED
}
static class Datapoint {
private Datapoint(long t, long d) {
timestamp = t;
data = d;
}
long timestamp;
long data;
}
LinkedList<Datapoint> trafficdata = new LinkedList<DeviceStateReceiver.Datapoint>();
@Override
public void updateByteCount(long in, long out, long diffIn, long diffOut) {
if (screen != connectState.PENDINGDISCONNECT)
return;
long total = diffIn + diffOut;
trafficdata.add(new Datapoint(System.currentTimeMillis(), total));
while (trafficdata.getFirst().timestamp <= (System.currentTimeMillis() - TRAFFIC_WINDOW * 1000)) {
trafficdata.removeFirst();
}
long windowtraffic = 0;
for (Datapoint dp : trafficdata)
windowtraffic += dp.data;
if (windowtraffic < TRAFFIC_LIMIT) {
screen = connectState.DISCONNECTED;
VpnStatus.logInfo(R.string.screenoff_pause,
OpenVPNService.humanReadableByteCount(TRAFFIC_LIMIT, false), TRAFFIC_WINDOW);
mManagement.pause(getPauseReason());
}
}
public void userPause(boolean pause) {
if (pause) {
userpause = connectState.DISCONNECTED;
// Check if we should disconnect
mManagement.pause(getPauseReason());
} else {
boolean wereConnected = shouldBeConnected();
userpause = connectState.SHOULDBECONNECTED;
if (shouldBeConnected() && !wereConnected)
mManagement.resume();
else
// Update the reason why we currently paused
mManagement.pause(getPauseReason());
}
}
public DeviceStateReceiver(OpenVPNManagement magnagement) {
super();
mManagement = magnagement;
}
@Override
public void onReceive(Context context, Intent intent) {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {
networkStateChange(context);
} else if (Intent.ACTION_SCREEN_OFF.equals(intent.getAction())) {
boolean screenOffPause = prefs.getBoolean("screenoff", false);
if (screenOffPause) {
if (ProfileManager.getLastConnectedVpn()!=null && !ProfileManager.getLastConnectedVpn().mPersistTun)
VpnStatus.logError(R.string.screen_nopersistenttun);
screen = connectState.PENDINGDISCONNECT;
fillTrafficData();
if (network == connectState.DISCONNECTED || userpause == connectState.DISCONNECTED)
screen = connectState.DISCONNECTED;
}
} else if (Intent.ACTION_SCREEN_ON.equals(intent.getAction())) {
// Network was disabled because screen off
boolean connected = shouldBeConnected();
screen = connectState.SHOULDBECONNECTED;
/* should be connected has changed because the screen is on now, connect the VPN */
if (shouldBeConnected() != connected)
mManagement.resume();
else if (!shouldBeConnected())
/*Update the reason why we are still paused */
mManagement.pause(getPauseReason());
}
}
private void fillTrafficData() {
trafficdata.add(new Datapoint(System.currentTimeMillis(), TRAFFIC_LIMIT));
}
public void networkStateChange(Context context) {
NetworkInfo networkInfo = getCurrentNetworkInfo(context);
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
boolean sendusr1 = prefs.getBoolean("netchangereconnect", true);
String netstatestring;
if (networkInfo == null) {
netstatestring = "not connected";
} else {
String subtype = networkInfo.getSubtypeName();
if (subtype == null)
subtype = "";
String extrainfo = networkInfo.getExtraInfo();
if (extrainfo == null)
extrainfo = "";
/*
if(networkInfo.getType()==android.net.ConnectivityManager.TYPE_WIFI) {
WifiManager wifiMgr = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiinfo = wifiMgr.getConnectionInfo();
extrainfo+=wifiinfo.getBSSID();
subtype += wifiinfo.getNetworkId();
}*/
netstatestring = String.format("%2$s %4$s to %1$s %3$s", networkInfo.getTypeName(),
networkInfo.getDetailedState(), extrainfo, subtype);
}
if (networkInfo != null && networkInfo.getState() == State.CONNECTED) {
int newnet = networkInfo.getType();
network = connectState.SHOULDBECONNECTED;
if (lastNetwork != newnet) {
if (screen == connectState.PENDINGDISCONNECT)
screen = connectState.DISCONNECTED;
if (shouldBeConnected()) {
if (sendusr1) {
if (lastNetwork == -1) {
mManagement.resume();
} else {
mManagement.reconnect();
}
} else {
mManagement.networkChange();
}
}
lastNetwork = newnet;
}
} else if (networkInfo == null) {
// Not connected, stop openvpn, set last connected network to no network
lastNetwork = -1;
if (sendusr1) {
network = connectState.DISCONNECTED;
// Set screen state to be disconnected if disconnect pending
if (screen == connectState.PENDINGDISCONNECT)
screen = connectState.DISCONNECTED;
mManagement.pause(getPauseReason());
}
}
if (!netstatestring.equals(lastStateMsg))
VpnStatus.logInfo(R.string.netstatus, netstatestring);
lastStateMsg = netstatestring;
}
public boolean isUserPaused() {
return userpause == connectState.DISCONNECTED;
}
private boolean shouldBeConnected() {
return (screen == connectState.SHOULDBECONNECTED && userpause == connectState.SHOULDBECONNECTED &&
network == connectState.SHOULDBECONNECTED);
}
private pauseReason getPauseReason() {
if (userpause == connectState.DISCONNECTED)
return pauseReason.userPause;
if (screen == connectState.DISCONNECTED)
return pauseReason.screenOff;
if (network == connectState.DISCONNECTED)
return pauseReason.noNetwork;
return pauseReason.userPause;
}
private NetworkInfo getCurrentNetworkInfo(Context context) {
ConnectivityManager conn = (ConnectivityManager)
context.getSystemService(Context.CONNECTIVITY_SERVICE);
return conn.getActiveNetworkInfo();
}
}
|
