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
|
/*
* Copyright 2013 Anton Tananaev (anton.tananaev@gmail.com)
*
* 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 java.nio.ByteOrder;
import java.net.SocketAddress;
import java.util.Calendar;
import java.util.TimeZone;
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.helper.UnitsConverter;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class CellocatorProtocolDecoder extends BaseProtocolDecoder {
public CellocatorProtocolDecoder(CellocatorProtocol protocol) {
super(protocol);
}
private String readImei(ChannelBuffer buf) {
int b = buf.readUnsignedByte();
StringBuilder imei = new StringBuilder();
imei.append(b & 0x0F);
for (int i = 0; i < 7; i++) {
b = buf.readUnsignedByte();
imei.append((b & 0xF0) >> 4);
imei.append(b & 0x0F);
}
return imei.toString();
}
static final int MSG_CLIENT_STATUS = 0;
static final int MSG_CLIENT_PROGRAMMING = 3;
static final int MSG_CLIENT_SERIAL_LOG = 7;
static final int MSG_CLIENT_SERIAL = 8;
static final int MSG_CLIENT_MODULAR = 9;
private static final int MSG_SERVER_ACKNOWLEDGE = 4;
private byte commandCount;
private void sendReply(Channel channel, long deviceId, byte packetNumber) {
ChannelBuffer reply = ChannelBuffers.directBuffer(ByteOrder.LITTLE_ENDIAN, 28);
reply.writeByte('M');
reply.writeByte('C');
reply.writeByte('G');
reply.writeByte('P');
reply.writeByte(MSG_SERVER_ACKNOWLEDGE);
reply.writeInt((int) deviceId);
reply.writeByte(commandCount++);
reply.writeInt(0); // authentication code
reply.writeByte(0);
reply.writeByte(packetNumber);
reply.writeZero(11);
byte checksum = 0;
for (int i = 4; i < 27; i++) {
checksum += reply.getByte(i);
}
reply.writeByte(checksum);
if (channel != null) {
channel.write(reply);
}
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg)
throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.skipBytes(4); // system code
int type = buf.readUnsignedByte();
long deviceUniqueId = buf.readUnsignedInt();
if (type != MSG_CLIENT_SERIAL) {
buf.readUnsignedShort(); // communication control
}
byte packetNumber = buf.readByte();
// Send reply
sendReply(channel, deviceUniqueId, packetNumber);
// Parse location
if (type == MSG_CLIENT_STATUS) {
Position position = new Position();
position.setProtocol(getProtocolName());
// Device identifier
if (!identify(String.valueOf(deviceUniqueId), channel)) {
return null;
}
position.setDeviceId(getDeviceId());
buf.readUnsignedByte(); // hardware version
buf.readUnsignedByte(); // software version
buf.readUnsignedByte(); // protocol version
// Status
position.set(Event.KEY_STATUS, buf.getUnsignedByte(buf.readerIndex()) & 0x0f);
int operator = (buf.readUnsignedByte() & 0xf0) << 4;
operator += buf.readUnsignedByte();
buf.readUnsignedByte(); // reason data
buf.readUnsignedByte(); // reason
buf.readUnsignedByte(); // mode
buf.readUnsignedInt(); // IO
operator <<= 8;
operator += buf.readUnsignedByte();
position.set("operator", operator);
buf.readUnsignedInt(); // ADC
buf.readUnsignedMedium(); // Odometer
buf.skipBytes(6); // multi-purpose data
buf.readUnsignedShort(); // gps fix
buf.readUnsignedByte(); // location status
buf.readUnsignedByte(); // mode 1
buf.readUnsignedByte(); // mode 2
position.setValid(buf.readUnsignedByte() >= 3); // satellites
// Location data
position.setLongitude(buf.readInt() / Math.PI * 180 / 100000000);
position.setLatitude(buf.readInt() / Math.PI * 180 / 100000000.0);
position.setAltitude(buf.readInt() * 0.01);
position.setSpeed(UnitsConverter.knotsFromMps(buf.readInt() * 0.01));
position.setCourse(buf.readUnsignedShort() / Math.PI * 180.0 / 1000.0);
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.SECOND, buf.readUnsignedByte());
time.set(Calendar.MINUTE, buf.readUnsignedByte());
time.set(Calendar.HOUR_OF_DAY, buf.readUnsignedByte());
time.set(Calendar.DAY_OF_MONTH, buf.readUnsignedByte());
time.set(Calendar.MONTH, buf.readUnsignedByte() - 1);
time.set(Calendar.YEAR, buf.readUnsignedShort());
position.setTime(time.getTime());
return position;
}
return null;
}
}
|
