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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/*
* Copyright 2012 - 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.charset.Charset;
import java.util.Calendar;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.BaseProtocolDecoder;
import org.traccar.ServerManager;
import org.traccar.helper.ChannelBufferTools;
import org.traccar.helper.Log;
import org.traccar.model.ExtendedInfoFormatter;
import org.traccar.model.Position;
public class Jt600ProtocolDecoder extends BaseProtocolDecoder {
public Jt600ProtocolDecoder(ServerManager serverManager) {
super(serverManager);
}
public Jt600ProtocolDecoder(ServerManager serverManager, String protocol) {
super(serverManager, protocol);
}
private Position decodeNormalMessage(ChannelBuffer buf) throws Exception {
Position position = new Position();
ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter(getProtocol());
buf.readByte(); // header
// Get device by identifier
String id = Long.valueOf(ChannelBufferTools.readHexString(buf, 10)).toString();
try {
position.setDeviceId(getDataManager().getDeviceByImei(id).getId());
} catch(Exception error) {
Log.warning("Unknown device - " + id);
//return null;
}
// Protocol and type
int version = ChannelBufferTools.readHexInteger(buf, 1);
int type = buf.readUnsignedByte() & 0xf;
buf.readBytes(2); // length
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.DAY_OF_MONTH, ChannelBufferTools.readHexInteger(buf, 2));
time.set(Calendar.MONTH, ChannelBufferTools.readHexInteger(buf, 2) - 1);
time.set(Calendar.YEAR, 2000 + ChannelBufferTools.readHexInteger(buf, 2));
time.set(Calendar.HOUR_OF_DAY, ChannelBufferTools.readHexInteger(buf, 2));
time.set(Calendar.MINUTE, ChannelBufferTools.readHexInteger(buf, 2));
time.set(Calendar.SECOND, ChannelBufferTools.readHexInteger(buf, 2));
position.setTime(time.getTime());
// Coordinates
int temp = ChannelBufferTools.readHexInteger(buf, 8);
double latitude = temp % 1000000;
latitude /= 60 * 10000;
latitude += temp / 1000000;
temp = ChannelBufferTools.readHexInteger(buf, 9);
double longitude = temp % 1000000;
longitude /= 60 * 10000;
longitude += temp / 1000000;
// Flags
byte flags = buf.readByte();
position.setValid((flags & 0x1) == 0x1);
if ((flags & 0x2) == 0) latitude = -latitude;
position.setLatitude(latitude);
if ((flags & 0x4) == 0) longitude = -longitude;
position.setLongitude(longitude);
// Speed
position.setSpeed((double) ChannelBufferTools.readHexInteger(buf, 2));
// Course
position.setCourse(buf.readUnsignedByte() * 2.0);
if (version == 1) {
extendedInfo.set("satellites", buf.readUnsignedByte());
// Power
extendedInfo.set("power", buf.readUnsignedByte());
buf.readByte(); // other flags and sensors
// Altitude
position.setAltitude((double) buf.readUnsignedShort());
extendedInfo.set("cell", buf.readUnsignedShort());
extendedInfo.set("lac", buf.readUnsignedShort());
extendedInfo.set("gsm", buf.readUnsignedByte());
} else if (version == 2) {
position.setAltitude(0.0);
int fuel = buf.readUnsignedByte() << 8;
extendedInfo.set("status", buf.readUnsignedInt());
extendedInfo.set("milage", buf.readUnsignedInt());
fuel += buf.readUnsignedByte();
extendedInfo.set("fuel", fuel);
}
position.setExtendedInfo(extendedInfo.toString());
return position;
}
private static final Pattern pattern = Pattern.compile(
"\\(" +
"([\\d]+)," + // Id
"W01," + // Type
"(\\d{3})(\\d{2}.\\d{4})," + // Longitude (DDDMM.MMMM)
"([EW])," +
"(\\d{2})(\\d{2}.\\d{4})," + // Latitude (DDMM.MMMM)
"([NS])," +
"([AV])," + // Validity
"(\\d{2})(\\d{2})(\\d{2})," + // Date (DDMMYY)
"(\\d{2})(\\d{2})(\\d{2})," + // Time (HHMMSS)
"(\\d+)," + // Speed (km/h)
"(\\d+)," + // Course
"(\\d+)," + // Power
"(\\d+)," + // GPS signal
"(\\d+)," + // GSM signal
"(\\d+)," + // Alert Type
".*\\)");
private Position decodeAlertMessage(ChannelBuffer buf) throws Exception {
String message = buf.toString(Charset.defaultCharset());
// Parse message
Matcher parser = pattern.matcher(message);
if (!parser.matches()) {
return null;
}
// Create new position
Position position = new Position();
ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter(getProtocol());
extendedInfo.set("alert", "true");
Integer index = 1;
// Get device by identifier
String id = parser.group(index++);
try {
position.setDeviceId(getDataManager().getDeviceByImei(id).getId());
} catch(Exception error) {
Log.warning("Unknown device - " + id);
return null;
}
// Longitude
Double longitude = Double.valueOf(parser.group(index++));
longitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
position.setLongitude(longitude);
// Latitude
Double latitude = Double.valueOf(parser.group(index++));
latitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
position.setLatitude(latitude);
// Validity
position.setValid(parser.group(index++).compareTo("A") == 0);
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
time.set(Calendar.HOUR_OF_DAY, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++)));
time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++)));
position.setTime(time.getTime());
// Speed
position.setSpeed(Double.valueOf(parser.group(index++)));
// Course
position.setCourse(Double.valueOf(parser.group(index++)));
// Altitude
position.setAltitude(0.0);
// Power
extendedInfo.set("power", Double.valueOf(parser.group(index++)));
position.setExtendedInfo(extendedInfo.toString());
return position;
}
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
char first = (char) buf.getByte(0);
// Check message type
if (first == '$') {
return decodeNormalMessage(buf);
} else if (first == '(') {
return decodeAlertMessage(buf);
}
return null;
}
}
|
