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
|
/*
* Copyright 2021 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.traccar.protocol;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;
import org.traccar.model.WifiAccessPoint;
import java.net.SocketAddress;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
public class Xexun2ProtocolDecoder extends BaseProtocolDecoder {
public Xexun2ProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final int MSG_POSITION = 0x14;
private void sendResponse(Channel channel, int type, int index, ByteBuf imei) {
if (channel != null) {
ByteBuf response = Unpooled.buffer();
response.writeByte(0xfa);
response.writeByte(0xaf);
response.writeShort(type);
response.writeShort(index);
response.writeBytes(imei);
response.writeShort(1); // attributes / length
response.writeShort(0xfffe); // checksum
response.writeByte(1); // response
response.writeByte(0xfa);
response.writeByte(0xaf);
channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
}
}
private String decodeAlarm(long value) {
if (BitUtil.check(value, 0)) {
return Position.ALARM_SOS;
}
if (BitUtil.check(value, 15)) {
return Position.ALARM_FALL_DOWN;
}
return null;
}
private double convertCoordinate(double value) {
double degrees = Math.floor(value / 100);
double minutes = value - degrees * 100;
return degrees + minutes / 60;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
buf.skipBytes(2); // flag
int type = buf.readUnsignedShort();
int index = buf.readUnsignedShort();
ByteBuf imei = buf.readSlice(8);
DeviceSession deviceSession = getDeviceSession(
channel, remoteAddress, ByteBufUtil.hexDump(imei).substring(0, 15));
if (deviceSession == null) {
return null;
}
sendResponse(channel, type, index, imei);
buf.readUnsignedShort(); // attributes
buf.readUnsignedShort(); // checksum
if (type == MSG_POSITION) {
List<Integer> lengths = new ArrayList<>();
List<Position> positions = new ArrayList<>();
int count = buf.readUnsignedByte();
for (int i = 0; i < count; i++) {
lengths.add(buf.readUnsignedShort());
}
for (int i = 0; i < count; i++) {
int endIndex = buf.readerIndex() + lengths.get(i);
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_INDEX, buf.readUnsignedByte());
position.setDeviceTime(new Date(buf.readUnsignedInt() * 1000));
position.set(Position.KEY_RSSI, buf.readUnsignedByte());
int battery = buf.readUnsignedShort();
position.set(Position.KEY_CHARGE, BitUtil.check(battery, 15));
position.set(Position.KEY_BATTERY_LEVEL, BitUtil.to(battery, 15));
int mask = buf.readUnsignedByte();
if (BitUtil.check(mask, 0)) {
position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedInt()));
}
if (BitUtil.check(mask, 1)) {
int positionMask = buf.readUnsignedByte();
if (BitUtil.check(positionMask, 0)) {
position.setValid(true);
position.setFixTime(position.getDeviceTime());
position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
position.setLongitude(convertCoordinate(buf.readFloat()));
position.setLatitude(convertCoordinate(buf.readFloat()));
}
Network network = new Network();
if (BitUtil.check(positionMask, 1)) {
int wifiCount = buf.readUnsignedByte();
for (int j = 0; j < wifiCount; j++) {
String mac = ByteBufUtil.hexDump(buf.readSlice(6)).replaceAll("(..)", "$1:");
network.addWifiAccessPoint(WifiAccessPoint.from(
mac.substring(0, mac.length() - 1), buf.readUnsignedByte()));
}
}
if (BitUtil.check(positionMask, 2)) {
int cellCount = buf.readUnsignedByte();
for (int j = 0; j < cellCount; j++) {
network.addCellTower(CellTower.from(
buf.readUnsignedShort(), buf.readUnsignedShort(),
buf.readInt(), buf.readUnsignedInt(), buf.readUnsignedByte()));
}
}
if (network.getWifiAccessPoints() != null || network.getCellTowers() != null) {
position.setNetwork(network);
}
if (BitUtil.check(positionMask, 3)) {
buf.skipBytes(12 * buf.readUnsignedByte()); // tof
}
if (BitUtil.check(positionMask, 5)) {
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort() * 0.1));
position.setCourse(buf.readUnsignedShort() * 0.1);
}
if (BitUtil.check(positionMask, 6)) {
position.setValid(true);
position.setFixTime(position.getDeviceTime());
position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
position.setLongitude(convertCoordinate(buf.readDouble()));
position.setLatitude(convertCoordinate(buf.readDouble()));
}
}
if (BitUtil.check(mask, 3)) {
buf.readUnsignedInt(); // fingerprint
}
if (BitUtil.check(mask, 4)) {
buf.skipBytes(20); // version
buf.skipBytes(8); // imsi
buf.skipBytes(10); // iccid
}
if (BitUtil.check(mask, 5)) {
buf.skipBytes(12); // device parameters
}
if (!position.getValid()) {
getLastLocation(position, position.getDeviceTime());
}
positions.add(position);
buf.readerIndex(endIndex);
}
return positions;
}
return null;
}
}
|
