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
|
/*
* Copyright 2012 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.util.Calendar;
import java.util.TimeZone;
import java.nio.charset.Charset;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.GenericProtocolDecoder;
import org.traccar.helper.Log;
import org.traccar.model.DataManager;
import org.traccar.model.Position;
/**
* Progress tracker protocol decoder
*/
public class ProgressProtocolDecoder extends GenericProtocolDecoder {
/**
* Device ID
*/
private long deviceId;
/**
* Initialize
*/
public ProgressProtocolDecoder(DataManager dataManager) {
super(dataManager);
}
/*
* Message types
*/
static final int MSG_NULL = 0;
static final int MSG_IDENT = 1;
static final int MSG_IDENT_FULL = 2;
static final int MSG_POINT = 10;
static final int MSG_LOG_SYNC = 100;
static final int MSG_LOGMSG = 101;
static final int MSG_TEXT = 102;
static final int MSG_ALARM = 200;
static final int MSG_ALARM_RECIEVED = 201;
/**
* Decode message
*/
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
int type = buf.readUnsignedShort();
int length = buf.readUnsignedShort();
// Authentication
if (type == MSG_IDENT || type == MSG_IDENT_FULL) {
long id = buf.readUnsignedInt();
length = buf.readUnsignedShort();
buf.skipBytes(length);
length = buf.readUnsignedShort();
String imei = buf.readBytes(length).toString(Charset.defaultCharset());
try {
deviceId = getDataManager().getDeviceByImei(imei).getId();
} catch(Exception error) {
Log.warning("Unknown device - " + imei);
}
}
// Position
else if (type == MSG_POINT || type == MSG_ALARM) {
Position position = new Position();
StringBuilder extendedInfo = new StringBuilder("<protocol>progress</protocol>");
position.setDeviceId(deviceId);
// Message index
buf.readUnsignedInt();
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.setTimeInMillis(buf.readUnsignedInt() * 1000);
position.setTime(time.getTime());
// Latitude
position.setLatitude(((double) buf.readInt()) / 0x7FFFFFFF * 180.0);
// Longitude
position.setLongitude(((double) buf.readInt()) / 0x7FFFFFFF * 180.0);
// Speed
position.setSpeed(((double) buf.readUnsignedInt()) / 100);
// Course
position.setCourse(((double) buf.readUnsignedShort()) / 100);
// Altitude
position.setAltitude(((double) buf.readUnsignedShort()) / 100);
// Satellites
int satellitesNumber = buf.readUnsignedByte();
extendedInfo.append("<sat>");
extendedInfo.append(satellitesNumber);
extendedInfo.append("</sat>");
position.setValid(satellitesNumber >= 3); // TODO: probably wrong
// Cell signal
extendedInfo.append("<gsm>");
extendedInfo.append(buf.readUnsignedByte());
extendedInfo.append("</gsm>");
// TODO: process other data
// Extended info
position.setExtendedInfo(extendedInfo.toString());
// Send response for alarm message
if (type == MSG_ALARM) {
byte[] response = {(byte)0xC9,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
channel.write(ChannelBuffers.wrappedBuffer(response));
extendedInfo.append("<alarm>true</alarm>");
}
return position;
}
return null;
}
}
|
