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
|
/*
* Copyright 2015 - 2019 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.BcdUtil;
import org.traccar.helper.BitUtil;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
public class T800xProtocolDecoder extends BaseProtocolDecoder {
public T800xProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final int MSG_LOGIN = 0x01;
public static final int MSG_GPS = 0x02;
public static final int MSG_HEARTBEAT = 0x03;
public static final int MSG_ALARM = 0x04;
public static final int MSG_COMMAND = 0x81;
private void sendResponse(Channel channel, short header, int type, int index, ByteBuf imei, int alarm) {
if (channel != null) {
ByteBuf response = Unpooled.buffer(alarm > 0 ? 16 : 15);
response.writeShort(header);
response.writeByte(type);
response.writeShort(response.capacity()); // length
response.writeShort(index);
response.writeBytes(imei);
if (alarm > 0) {
response.writeByte(alarm);
}
channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
}
}
private String decodeAlarm(int value) {
switch (value) {
case 1:
return Position.ALARM_POWER_CUT;
case 2:
return Position.ALARM_LOW_BATTERY;
case 3:
return Position.ALARM_SOS;
case 4:
return Position.ALARM_OVERSPEED;
case 5:
return Position.ALARM_GEOFENCE_ENTER;
case 6:
return Position.ALARM_GEOFENCE_EXIT;
case 7:
return Position.ALARM_TOW;
case 8:
case 10:
return Position.ALARM_VIBRATION;
case 21:
return Position.ALARM_JAMMING;
case 23:
return Position.ALARM_POWER_RESTORED;
case 24:
return Position.ALARM_LOW_POWER;
default:
return null;
}
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
short header = buf.readShort();
int type = buf.readUnsignedByte();
buf.readUnsignedShort(); // length
int index = buf.readUnsignedShort();
ByteBuf imei = buf.readSlice(8);
DeviceSession deviceSession = getDeviceSession(
channel, remoteAddress, ByteBufUtil.hexDump(imei).substring(1));
if (deviceSession == null) {
return null;
}
if (type == MSG_GPS || type == MSG_ALARM) {
return decodePosition(channel, deviceSession, buf, header, type, index, imei);
} else if (type == MSG_COMMAND) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, null);
buf.readUnsignedByte(); // protocol number
position.set(Position.KEY_RESULT, buf.toString(StandardCharsets.UTF_16LE));
sendResponse(channel, header, type, index, imei, 0);
return position;
}
sendResponse(channel, header, type, index, imei, 0);
return null;
}
private Position decodePosition(
Channel channel, DeviceSession deviceSession,
ByteBuf buf, short header, int type, int index, ByteBuf imei) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_INDEX, index);
buf.readUnsignedShort(); // acc on interval
buf.readUnsignedShort(); // acc off interval
buf.readUnsignedByte(); // angle compensation
buf.readUnsignedShort(); // distance compensation
position.set(Position.KEY_RSSI, BitUtil.to(buf.readUnsignedShort(), 7));
int status = buf.readUnsignedByte();
position.set(Position.KEY_SATELLITES, BitUtil.to(status, 5));
buf.readUnsignedByte(); // gsensor manager status
buf.readUnsignedByte(); // other flags
buf.readUnsignedByte(); // heartbeat
buf.readUnsignedByte(); // relay status
buf.readUnsignedShort(); // drag alarm setting
int io = buf.readUnsignedShort();
position.set(Position.KEY_IGNITION, BitUtil.check(io, 14));
position.set("ac", BitUtil.check(io, 13));
position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
int alarm = buf.readUnsignedByte();
position.set(Position.KEY_ALARM, decodeAlarm(alarm));
buf.readUnsignedByte(); // reserved
position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
int battery = BcdUtil.readInteger(buf, 2);
if (battery == 0) {
battery = 100;
}
position.set(Position.KEY_BATTERY, battery);
DateBuilder dateBuilder = new DateBuilder()
.setYear(BcdUtil.readInteger(buf, 2))
.setMonth(BcdUtil.readInteger(buf, 2))
.setDay(BcdUtil.readInteger(buf, 2))
.setHour(BcdUtil.readInteger(buf, 2))
.setMinute(BcdUtil.readInteger(buf, 2))
.setSecond(BcdUtil.readInteger(buf, 2));
if (BitUtil.check(status, 6)) {
position.setValid(!BitUtil.check(status, 7));
position.setTime(dateBuilder.getDate());
position.setAltitude(buf.readFloatLE());
position.setLongitude(buf.readFloatLE());
position.setLatitude(buf.readFloatLE());
position.setSpeed(UnitsConverter.knotsFromKph(BcdUtil.readInteger(buf, 4) * 0.1));
position.setCourse(buf.readUnsignedShort());
} else {
getLastLocation(position, dateBuilder.getDate());
int mcc = buf.readUnsignedShortLE();
int mnc = buf.readUnsignedShortLE();
if (mcc != 0xffff && mnc != 0xffff) {
Network network = new Network();
for (int i = 0; i < 3; i++) {
network.addCellTower(CellTower.from(
mcc, mnc, buf.readUnsignedShortLE(), buf.readUnsignedShortLE()));
}
position.setNetwork(network);
}
}
if (buf.readableBytes() >= 2) {
position.set(Position.KEY_POWER, BcdUtil.readInteger(buf, 4) * 0.01);
}
sendResponse(channel, header, type, index, imei, alarm);
return position;
}
}
|
