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
|
/*
* 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.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.Checksum;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.Date;
public class ThinkPowerProtocolDecoder extends BaseProtocolDecoder {
public ThinkPowerProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final int MSG_LOGIN_REQUEST = 0x01;
public static final int MSG_LOGIN_RESPONSE = 0x02;
public static final int MSG_HEARTBEAT_REQUEST = 0x03;
public static final int MSG_HEARTBEAT_RESPONSE = 0x04;
public static final int MSG_RECORD_REPORT = 0x05;
public static final int MSG_RECORD_RESPONSE = 0x06;
private void sendResponse(Channel channel, int type, int index, ByteBuf content) {
if (channel != null) {
ByteBuf response = Unpooled.buffer();
response.writeByte(type);
response.writeByte(index);
if (content != null) {
response.writeShort(content.readableBytes());
response.writeBytes(content);
content.release();
} else {
response.writeShort(0);
}
response.writeShort(Checksum.crc16(Checksum.CRC16_CCITT_FALSE, response.nioBuffer()));
channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
}
}
private void decodeValue(Position position, int type, ByteBuf buf) {
switch (type) {
case 0x01:
position.setValid(true);
position.setLatitude(buf.readInt() * 0.0000001);
position.setLongitude(buf.readInt() * 0.0000001);
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort() * 0.1));
position.setCourse(buf.readUnsignedShort() * 0.01);
break;
case 0x02:
position.setValid(buf.readUnsignedByte() > 0);
break;
case 0x03:
buf.skipBytes(3); // geofence
break;
case 0x06:
case 0x07:
case 0x08:
buf.skipBytes(2); // g-sensor x/y/z
break;
case 0x09:
buf.readUnsignedByte(); // collision alarm
break;
case 0x0A:
buf.readUnsignedByte(); // drop alarm
break;
case 0x10:
if (buf.readUnsignedByte() > 0) {
position.set(Position.KEY_ALARM, Position.ALARM_SOS);
}
break;
case 0x12:
position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.1);
break;
case 0x13:
if (buf.readUnsignedByte() > 0) {
position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
}
break;
case 0x16:
buf.readUnsignedShort(); // temperature
break;
case 0x17:
buf.readUnsignedByte(); // humidity
break;
case 0x18:
buf.readUnsignedShort(); // high temperature
break;
case 0x19:
buf.readUnsignedByte(); // high humidity
break;
case 0x50:
if (buf.readUnsignedByte() > 0) {
position.set(Position.KEY_ALARM, Position.ALARM_REMOVING);
}
break;
case 0x51:
if (buf.readUnsignedByte() > 0) {
position.set(Position.KEY_ALARM, Position.ALARM_TAMPERING);
}
break;
default:
break;
}
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
int type = buf.readUnsignedByte();
int index = buf.readUnsignedByte();
buf.readUnsignedShort(); // length
if (type == MSG_LOGIN_REQUEST) {
buf.readUnsignedByte(); // protocol major version
buf.readUnsignedByte(); // protocol minor version
String id = buf.readCharSequence(buf.readUnsignedByte(), StandardCharsets.US_ASCII).toString();
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
ByteBuf content = Unpooled.buffer();
content.writeByte(deviceSession != null ? 0 : 4);
sendResponse(channel, MSG_LOGIN_RESPONSE, index, content);
} else if (type == MSG_HEARTBEAT_REQUEST) {
sendResponse(channel, MSG_HEARTBEAT_RESPONSE, index, null);
} else if (type == MSG_RECORD_REPORT) {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession == null) {
return null;
}
buf.readUnsignedByte(); // count
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setTime(new Date(buf.readUnsignedInt() * 1000));
while (buf.readableBytes() > 2) {
decodeValue(position, buf.readUnsignedByte(), buf);
}
sendResponse(channel, MSG_RECORD_RESPONSE, index, null);
return position;
}
return null;
}
}
|
