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
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
|
/*
* Copyright 2013 - 2017 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.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.ByteOrder;
import java.nio.charset.StandardCharsets;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class GalileoProtocolDecoder extends BaseProtocolDecoder {
public GalileoProtocolDecoder(GalileoProtocol protocol) {
super(protocol);
}
private static final Map<Integer, Integer> TAG_LENGTH_MAP = new HashMap<>();
static {
int[] l1 = {
0x01, 0x02, 0x35, 0x43, 0xc4, 0xc5, 0xc6, 0xc7,
0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0xd0, 0xd1, 0xd2, 0xd5, 0x88, 0x8a, 0x8b, 0x8c,
0xa0, 0xaf, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6,
0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae
};
int[] l2 = {
0x04, 0x10, 0x34, 0x40, 0x41, 0x42, 0x45, 0x46,
0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x60, 0x61,
0x62, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76,
0x77, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
0xb7, 0xb8, 0xb9, 0xd6, 0xd7, 0xd8, 0xd9, 0xda
};
int[] l3 = {
0x63, 0x64, 0x6f, 0x5d, 0x65, 0x66, 0x67, 0x68,
0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e
};
int[] l4 = {
0x20, 0x33, 0x44, 0x90, 0xc0, 0xc2, 0xc3, 0xd3,
0xd4, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xf0, 0xf9,
0x5a, 0x47, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6,
0xf7, 0xf8, 0xe2, 0xe9
};
for (int i : l1) {
TAG_LENGTH_MAP.put(i, 1);
}
for (int i : l2) {
TAG_LENGTH_MAP.put(i, 2);
}
for (int i : l3) {
TAG_LENGTH_MAP.put(i, 3);
}
for (int i : l4) {
TAG_LENGTH_MAP.put(i, 4);
}
TAG_LENGTH_MAP.put(0x5b, 7); // variable length
TAG_LENGTH_MAP.put(0x5c, 68);
}
private static int getTagLength(int tag) {
Integer length = TAG_LENGTH_MAP.get(tag);
if (length == null) {
throw new IllegalArgumentException("Unknown tag: " + tag);
}
return length;
}
private void sendReply(Channel channel, int checksum) {
ChannelBuffer reply = ChannelBuffers.directBuffer(ByteOrder.LITTLE_ENDIAN, 3);
reply.writeByte(0x02);
reply.writeShort((short) checksum);
if (channel != null) {
channel.write(reply);
}
}
private void decodeTag(Position position, ChannelBuffer buf, int tag) {
switch (tag) {
case 0x01:
position.set(Position.KEY_VERSION_HW, buf.readUnsignedByte());
break;
case 0x02:
position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
break;
case 0x04:
position.set("deviceId", buf.readUnsignedShort());
break;
case 0x10:
position.set(Position.KEY_INDEX, buf.readUnsignedShort());
break;
case 0x20:
position.setTime(new Date(buf.readUnsignedInt() * 1000));
break;
case 0x33:
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort() * 0.1));
position.setCourse(buf.readUnsignedShort() * 0.1);
break;
case 0x34:
position.setAltitude(buf.readShort());
break;
case 0x40:
position.set(Position.KEY_STATUS, buf.readUnsignedShort());
break;
case 0x41:
position.set(Position.KEY_POWER, buf.readUnsignedShort());
break;
case 0x42:
position.set(Position.KEY_BATTERY, buf.readUnsignedShort());
break;
case 0x43:
position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
break;
case 0x44:
position.set(Position.KEY_ACCELERATION, buf.readUnsignedInt());
break;
case 0x45:
position.set(Position.KEY_OUTPUT, buf.readUnsignedShort());
break;
case 0x46:
position.set(Position.KEY_INPUT, buf.readUnsignedShort());
break;
case 0x50:
case 0x51:
case 0x52:
case 0x53:
case 0x54:
case 0x55:
case 0x56:
case 0x57:
position.set(Position.PREFIX_ADC + (tag - 0x50), buf.readUnsignedShort());
break;
case 0x58:
position.set("rs2320", buf.readUnsignedShort());
break;
case 0x59:
position.set("rs2321", buf.readUnsignedShort());
break;
case 0xc0:
position.set("fuelTotal", buf.readUnsignedInt() * 0.5);
break;
case 0xc1:
position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte() * 0.4);
position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedByte() - 40);
position.set(Position.KEY_RPM, buf.readUnsignedShort() * 0.125);
break;
case 0xc2:
position.set("canB0", buf.readUnsignedInt());
break;
case 0xc3:
position.set("canB1", buf.readUnsignedInt());
break;
case 0xc4:
case 0xc5:
case 0xc6:
case 0xc7:
case 0xc8:
case 0xc9:
case 0xca:
case 0xcb:
case 0xcc:
case 0xcd:
case 0xce:
case 0xcf:
case 0xd0:
case 0xd1:
case 0xd2:
position.set("can8Bit" + (tag - 0xc4), buf.readUnsignedByte());
break;
case 0xd6:
case 0xd7:
case 0xd8:
case 0xd9:
case 0xda:
position.set("can16Bit" + (tag - 0xd6), buf.readUnsignedShort());
break;
case 0xdb:
case 0xdc:
case 0xdd:
case 0xde:
case 0xdf:
position.set("can32Bit" + (tag - 0xdb), buf.readUnsignedInt());
break;
case 0xd4:
position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
break;
case 0xe0:
position.set(Position.KEY_INDEX, buf.readUnsignedInt());
break;
case 0xe1:
position.set(Position.KEY_RESULT,
buf.readBytes(buf.readUnsignedByte()).toString(StandardCharsets.US_ASCII));
break;
case 0xe2:
case 0xe3:
case 0xe4:
case 0xe5:
case 0xe6:
case 0xe7:
case 0xe8:
case 0xe9:
position.set("userData" + (tag - 0xe2), buf.readUnsignedInt());
break;
case 0xea:
position.set("userDataArray", ChannelBuffers.hexDump(buf.readBytes(buf.readUnsignedByte())));
break;
default:
buf.skipBytes(getTagLength(tag));
break;
}
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.readUnsignedByte(); // header
int length = (buf.readUnsignedShort() & 0x7fff) + 3;
List<Position> positions = new LinkedList<>();
Set<Integer> tags = new HashSet<>();
boolean hasLocation = false;
DeviceSession deviceSession = null;
Position position = new Position();
while (buf.readerIndex() < length) {
// Check if new message started
int tag = buf.readUnsignedByte();
if (tags.contains(tag)) {
if (hasLocation && position.getFixTime() != null) {
positions.add(position);
}
tags.clear();
hasLocation = false;
position = new Position();
}
tags.add(tag);
if (tag == 0x03) {
deviceSession = getDeviceSession(
channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII));
} else if (tag == 0x30) {
hasLocation = true;
position.setValid((buf.readUnsignedByte() & 0xf0) == 0x00);
position.setLatitude(buf.readInt() / 1000000.0);
position.setLongitude(buf.readInt() / 1000000.0);
} else {
decodeTag(position, buf, tag);
}
}
if (hasLocation && position.getFixTime() != null) {
positions.add(position);
} else if (position.getAttributes().containsKey(Position.KEY_RESULT)) {
getLastLocation(position, null);
positions.add(position);
}
if (deviceSession == null) {
deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession == null) {
return null;
}
}
sendReply(channel, buf.readUnsignedShort());
for (Position p : positions) {
p.setProtocol(getProtocolName());
p.setDeviceId(deviceSession.getDeviceId());
}
return positions.isEmpty() ? null : positions;
}
}
|
