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
|
/*
* Copyright 2016 - 2024 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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.traccar.BaseProtocolDecoder;
import org.traccar.session.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.LinkedList;
import java.util.List;
public class AstraProtocolDecoder extends BaseProtocolDecoder {
private static final Logger LOGGER = LoggerFactory.getLogger(AstraProtocolDecoder.class);
public AstraProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final int MSG_HEARTBEAT = 0x1A;
public static final int MSG_DATA = 0x10;
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
byte protocol = buf.readByte();
buf.readUnsignedShort(); // length
return switch (protocol) {
case 'K' -> decodeK(channel, remoteAddress, buf);
default -> null;
};
}
private Object decodeK(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
if (channel != null) {
channel.writeAndFlush(new NetworkMessage(Unpooled.wrappedBuffer(new byte[] {0x06}), remoteAddress));
}
String imei = String.format("%08d", buf.readUnsignedInt()) + String.format("%07d", buf.readUnsignedMedium());
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
if (deviceSession == null) {
return null;
}
List<Position> positions = new LinkedList<>();
while (buf.readableBytes() > 2) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
buf.readUnsignedByte(); // index
position.setValid(true);
position.setLatitude(buf.readInt() * 0.000001);
position.setLongitude(buf.readInt() * 0.000001);
DateBuilder dateBuilder = new DateBuilder()
.setDate(1980, 1, 6).addMillis(buf.readUnsignedInt() * 1000L);
position.setTime(dateBuilder.getDate());
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte() * 2));
position.setCourse(buf.readUnsignedByte() * 2);
int reason = buf.readUnsignedMedium();
position.set(Position.KEY_EVENT, reason);
int status = buf.readUnsignedShort();
position.set(Position.KEY_STATUS, status);
position.set(Position.PREFIX_IO + 1, buf.readUnsignedByte());
position.set(Position.PREFIX_ADC + 1, buf.readUnsignedByte());
position.set(Position.KEY_BATTERY, buf.readUnsignedByte());
position.set(Position.KEY_POWER, buf.readUnsignedByte());
buf.readUnsignedByte(); // max journey speed
buf.skipBytes(6); // accelerometer
position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedShort());
buf.readUnsignedShort(); // journey idle time
position.setAltitude(buf.readUnsignedByte() * 20);
int quality = buf.readUnsignedByte();
position.set(Position.KEY_SATELLITES, quality & 0xf);
position.set(Position.KEY_RSSI, quality >> 4);
buf.readUnsignedByte(); // geofence events
if (BitUtil.check(status, 8)) {
position.set(Position.KEY_DRIVER_UNIQUE_ID, buf.readSlice(7).toString(StandardCharsets.US_ASCII));
position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium() * 1000);
position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(buf.readUnsignedShort()));
}
if (BitUtil.check(status, 6)) {
LOGGER.warn("Extension data is not supported");
return position;
}
positions.add(position);
}
return positions;
}
}
|
