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
|
/*
* Copyright 2013 - 2016 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 org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.helper.BcdUtil;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
public class GatorProtocolDecoder extends BaseProtocolDecoder {
public GatorProtocolDecoder(GatorProtocol protocol) {
super(protocol);
}
public static final int MSG_HEARTBEAT = 0x21;
public static final int MSG_POSITION_DATA = 0x80;
public static final int MSG_ROLLCALL_RESPONSE = 0x81;
public static final int MSG_ALARM_DATA = 0x82;
public static final int MSG_TERMINAL_STATUS = 0x83;
public static final int MSG_MESSAGE = 0x84;
public static final int MSG_TERMINAL_ANSWER = 0x85;
public static final int MSG_BLIND_AREA = 0x8E;
public static final int MSG_PICTURE_FRAME = 0x54;
public static final int MSG_CAMERA_RESPONSE = 0x56;
public static final int MSG_PICTURE_DATA = 0x57;
public static String decodeId(int b1, int b2, int b3, int b4) {
int d1 = 30 + ((b1 >> 7) << 3) + ((b2 >> 7) << 2) + ((b3 >> 7) << 1) + (b4 >> 7);
int d2 = b1 & 0x7f;
int d3 = b2 & 0x7f;
int d4 = b3 & 0x7f;
int d5 = b4 & 0x7f;
return String.format("%02d%02d%02d%02d%02d", d1, d2, d3, d4, d5);
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.skipBytes(2); // header
int type = buf.readUnsignedByte();
buf.readUnsignedShort(); // length
String id = decodeId(
buf.readUnsignedByte(), buf.readUnsignedByte(),
buf.readUnsignedByte(), buf.readUnsignedByte());
if (type == MSG_HEARTBEAT) {
if (channel != null) {
ChannelBuffer response = ChannelBuffers.dynamicBuffer();
response.writeByte(0x24); response.writeByte(0x24); // header
response.writeByte(MSG_HEARTBEAT); // size
response.writeShort(5);
response.writeByte(buf.readUnsignedByte());
response.writeByte(0); // main order
response.writeByte(0); // slave order
response.writeByte(1); // calibration
response.writeByte(0x0D);
channel.write(response);
}
} else if (type == MSG_POSITION_DATA || type == MSG_ROLLCALL_RESPONSE
|| type == MSG_ALARM_DATA || type == MSG_BLIND_AREA) {
Position position = new Position();
position.setProtocol(getProtocolName());
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, "1" + id, id);
if (deviceSession == null) {
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
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));
position.setTime(dateBuilder.getDate());
position.setLatitude(BcdUtil.readCoordinate(buf));
position.setLongitude(BcdUtil.readCoordinate(buf));
position.setSpeed(UnitsConverter.knotsFromKph(BcdUtil.readInteger(buf, 4)));
position.setCourse(BcdUtil.readInteger(buf, 4));
int flags = buf.readUnsignedByte();
position.setValid((flags & 0x80) != 0);
position.set(Position.KEY_SATELLITES, flags & 0x0f);
position.set(Position.KEY_STATUS, buf.readUnsignedByte());
position.set("key", buf.readUnsignedByte());
position.set("oil", buf.readUnsignedShort() / 10.0);
position.set(Position.KEY_POWER, buf.readUnsignedByte() + buf.readUnsignedByte() / 100.0);
position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
return position;
}
return null;
}
}
|
