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
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
/*
* Copyright 2012 - 2014 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 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.BaseProtocolDecoder;
import org.traccar.database.DataManager;
import org.traccar.helper.Crc;
import org.traccar.helper.Log;
import org.traccar.model.ExtendedInfoFormatter;
import org.traccar.model.Position;
import java.util.Calendar;
import java.util.Properties;
import java.util.TimeZone;
public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
private Long deviceId;
private final TimeZone timeZone = TimeZone.getTimeZone("UTC");
public Gt06ProtocolDecoder(DataManager dataManager, String protocol, Properties properties) {
super(dataManager, protocol, properties);
if (properties != null) {
if (properties.containsKey(protocol + ".timezone")) {
timeZone.setRawOffset(
Integer.valueOf(properties.getProperty(protocol + ".timezone")) * 1000);
}
}
}
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();
}
private static final int MSG_LOGIN = 0x01;
private static final int MSG_GPS = 0x10;
private static final int MSG_LBS = 0x11;
private static final int MSG_GPS_LBS_1 = 0x12;
private static final int MSG_GPS_LBS_2 = 0x22;
private static final int MSG_STATUS = 0x13;
private static final int MSG_SATELLITE = 0x14;
private static final int MSG_STRING = 0x15;
private static final int MSG_GPS_LBS_STATUS_1 = 0x16;
private static final int MSG_GPS_LBS_STATUS_2 = 0x26;
private static final int MSG_GPS_LBS_STATUS_3 = 0x27;
private static final int MSG_LBS_PHONE = 0x17;
private static final int MSG_LBS_EXTEND = 0x18;
private static final int MSG_LBS_STATUS = 0x19;
private static final int MSG_GPS_PHONE = 0x1A;
private static final int MSG_GPS_LBS_EXTEND = 0x1E;
private static final int MSG_COMMAND_0 = 0x80;
private static final int MSG_COMMAND_1 = 0x81;
private static final int MSG_COMMAND_2 = 0x82;
private static void sendResponse(Channel channel, int type, int index) {
if (channel != null) {
ChannelBuffer response = ChannelBuffers.directBuffer(10);
response.writeByte(0x78); response.writeByte(0x78); // header
response.writeByte(0x05); // size
response.writeByte(type);
response.writeShort(index);
response.writeShort(Crc.crc16Ccitt(response.toByteBuffer(2, 4)));
response.writeByte(0x0D); response.writeByte(0x0A); // ending
channel.write(response);
}
}
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
// Check header
if (buf.readByte() != 0x78 || buf.readByte() != 0x78) {
return null;
}
int length = buf.readUnsignedByte(); // size
int dataLength = length - 5;
int type = buf.readUnsignedByte();
if (type == MSG_LOGIN) {
String imei = readImei(buf);
buf.readUnsignedShort(); // type
// Timezone offset
if (dataLength > 10) {
int extensionBits = buf.readUnsignedShort();
int offset = (extensionBits >> 4) * 36000;
if ((extensionBits & 0x8) != 0) {
offset = -offset;
}
timeZone.setRawOffset(offset);
}
try {
deviceId = getDataManager().getDeviceByImei(imei).getId();
buf.skipBytes(buf.readableBytes() - 6);
sendResponse(channel, type, buf.readUnsignedShort());
} catch(Exception error) {
Log.warning("Unknown device - " + imei);
}
} else if (deviceId != null && (
type == MSG_GPS ||
type == MSG_GPS_LBS_1 ||
type == MSG_GPS_LBS_2 ||
type == MSG_GPS_LBS_STATUS_1 ||
type == MSG_GPS_LBS_STATUS_2 ||
type == MSG_GPS_LBS_STATUS_3 ||
type == MSG_GPS_PHONE ||
type == MSG_GPS_LBS_EXTEND)) {
// Create new position
Position position = new Position();
position.setDeviceId(deviceId);
ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter(getProtocol());
// Date and time
Calendar time = Calendar.getInstance(timeZone);
time.clear();
time.set(Calendar.YEAR, 2000 + buf.readUnsignedByte());
time.set(Calendar.MONTH, buf.readUnsignedByte() - 1);
time.set(Calendar.DAY_OF_MONTH, buf.readUnsignedByte());
time.set(Calendar.HOUR_OF_DAY, buf.readUnsignedByte());
time.set(Calendar.MINUTE, buf.readUnsignedByte());
time.set(Calendar.SECOND, buf.readUnsignedByte());
position.setTime(time.getTime());
// GPS length and Satellites count
int gpsLength = buf.readUnsignedByte();
extendedInfo.set("satellites", gpsLength & 0xf);
gpsLength >>= 4;
// Latitude
double latitude = buf.readUnsignedInt() / (60.0 * 30000.0);
// Longitude
double longitude = buf.readUnsignedInt() / (60.0 * 30000.0);
// Speed
position.setSpeed(buf.readUnsignedByte() * 0.539957);
// Course and flags
int union = buf.readUnsignedShort();
position.setCourse((double) (union & 0x03FF));
position.setValid((union & 0x1000) != 0);
if ((union & 0x0400) == 0) latitude = -latitude;
if ((union & 0x0800) != 0) longitude = -longitude;
position.setLatitude(latitude);
position.setLongitude(longitude);
position.setAltitude(0.0);
if ((union & 0x4000) != 0) {
extendedInfo.set("acc", (union & 0x8000) != 0);
}
buf.skipBytes(gpsLength - 12); // skip reserved
if (type == MSG_GPS_LBS_1 || type == MSG_GPS_LBS_2 ||
type == MSG_GPS_LBS_STATUS_1 || type == MSG_GPS_LBS_STATUS_2 || type == MSG_GPS_LBS_STATUS_3) {
int lbsLength = 0;
if (type == MSG_GPS_LBS_STATUS_1 || type == MSG_GPS_LBS_STATUS_2 || type == MSG_GPS_LBS_STATUS_3) {
lbsLength = buf.readUnsignedByte();
}
// Cell information
extendedInfo.set("mcc", buf.readUnsignedShort());
extendedInfo.set("mnc", buf.readUnsignedByte());
extendedInfo.set("lac", buf.readUnsignedShort());
extendedInfo.set("cell", buf.readUnsignedShort() << 8 + buf.readUnsignedByte());
buf.skipBytes(lbsLength - 9);
// Status
if (type == MSG_GPS_LBS_STATUS_1 || type == MSG_GPS_LBS_STATUS_2 || type == MSG_GPS_LBS_STATUS_3) {
int flags = buf.readUnsignedByte();
String binaryAlarm = Integer.toBinaryString(flags);
Log.debug("Binary of Flags" + binaryAlarm);
String alarm = binaryAlarm.substring(1, 4);
if(alarm.equals("100")) {
Log.debug("SOS ALARM");
extendedInfo.set("sos", true);
} else if(alarm.equals("011")){
Log.debug("LOW BATTERY ALARM");
extendedInfo.set("sos", true);
}
extendedInfo.set("alarm", true);
extendedInfo.set("acc", (flags & 0x2) != 0);
// TODO parse other flags
// Voltage
extendedInfo.set("power", buf.readUnsignedByte());
// GSM signal
extendedInfo.set("gsm", buf.readUnsignedByte());
}
}
// Index
if (buf.readableBytes() > 6) {
buf.skipBytes(buf.readableBytes() - 6);
}
int index = buf.readUnsignedShort();
extendedInfo.set("index", index);
sendResponse(channel, type, index);
position.setExtendedInfo(extendedInfo.toString());
return position;
}
else {
buf.skipBytes(dataLength);
if (type != MSG_COMMAND_0 && type != MSG_COMMAND_1 && type != MSG_COMMAND_2) {
sendResponse(channel, type, buf.readUnsignedShort());
}
}
return null;
}
}
|
