aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/protocol/MeiligaoProtocolDecoder.java
blob: cb2139a00eb2bf6433e904f08cf36a9184d8424e (plain)
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
307
/*
 * Copyright 2012 - 2015 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.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.charset.Charset;
import java.util.regex.Pattern;
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.Context;
import org.traccar.helper.Checksum;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.model.Event;
import org.traccar.model.Position;

public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {

    public MeiligaoProtocolDecoder(MeiligaoProtocol protocol) {
        super(protocol);
    }

    private static final Pattern PATTERN = new PatternBuilder()
            .number("(dd)(dd)(dd).?(d+)?,")      // time
            .expression("([AV]),")               // validity
            .number("(d+)(dd.d+),")              // latitude
            .expression("([NS]),")
            .number("(d+)(dd.d+),")              // longitude
            .expression("([EW]),")
            .number("(d+.?d*)?,")                // speed
            .number("(d+.?d*)?,")                // course
            .number("(dd)(dd)(dd)")              // date (ddmmyy)
            .expression("[^\\|]*")
            .groupBegin()
            .number("|(d+.d+)?")                 // hdop
            .number("|(-?d+.?d*)?")              // altitude
            .number("|(xxxx)?")                  // state
            .groupBegin()
            .number("|(xxxx),(xxxx)")            // adc
            .groupBegin()
            .number(",(xxxx),(xxxx),(xxxx),(xxxx),(xxxx),(xxxx)")
            .groupEnd("?")
            .groupBegin()
            .text("|")
            .groupBegin()
            .number("(x{16})")                   // cell
            .number("|(xx)")                     // gsm
            .number("|(x{8})|")                  // odometer
            .number("(x{9})")                    // odometer
            .groupBegin()
            .number("|(x{5,})")                  // rfid
            .groupEnd("?")
            .groupEnd("?")
            .groupEnd("?")
            .groupEnd("?")
            .groupEnd("?")
            .any()
            .compile();

    private static final Pattern PATTERN_RFID = new PatternBuilder()
            .number("|(dd)(dd)(dd),")            // time
            .number("(dd)(dd)(dd),")             // Date (ddmmyy)
            .number("(d+)(dd.d+),")              // latitude
            .expression("([NS]),")
            .number("(d+)(dd.d+),")              // longitude
            .expression("([EW])")
            .compile();

    public static final int MSG_HEARTBEAT = 0x0001;
    public static final int MSG_SERVER = 0x0002;
    public static final int MSG_LOGIN = 0x5000;
    public static final int MSG_LOGIN_RESPONSE = 0x4000;

    public static final int MSG_POSITION = 0x9955;
    public static final int MSG_POSITION_LOGGED = 0x9016;
    public static final int MSG_ALARM = 0x9999;

    public static final int MSG_RFID = 0x9966;

    private boolean identify(ChannelBuffer buf, Channel channel, SocketAddress remoteAddress) {
        StringBuilder builder = new StringBuilder();

        for (int i = 0; i < 7; i++) {
            int b = buf.readUnsignedByte();

            // First digit
            int d1 = (b & 0xf0) >> 4;
            if (d1 == 0xf) {
                break;
            }
            builder.append(d1);

            // Second digit
            int d2 = b & 0x0f;
            if (d2 == 0xf) {
                break;
            }
            builder.append(d2);
        }

        String id = builder.toString();

        // Try to recreate full IMEI number
        // Sometimes first digit is cut, so this won't work
        if (id.length() == 14 && identify(id + Checksum.luhn(Long.parseLong(id)), channel, remoteAddress, false)) {
            return true;
        }

        return identify(id, channel, remoteAddress);
    }

    private static void sendResponse(
            Channel channel, SocketAddress remoteAddress, ChannelBuffer id, int type, ChannelBuffer msg) {

        if (channel != null) {
            ChannelBuffer buf = ChannelBuffers.buffer(
                    2 + 2 + id.readableBytes() + 2 + msg.readableBytes() + 2 + 2);

            buf.writeByte('@');
            buf.writeByte('@');
            buf.writeShort(buf.capacity());
            buf.writeBytes(id);
            buf.writeShort(type);
            buf.writeBytes(msg);
            buf.writeShort(Checksum.crc16(Checksum.CRC16_CCITT_FALSE, buf.toByteBuffer()));
            buf.writeByte('\r');
            buf.writeByte('\n');

            channel.write(buf, remoteAddress);
        }
    }

    private String getMeiligaoServer(Channel channel) {
        String server = Context.getConfig().getString(getProtocolName() + ".server");
        if (server == null) {
            InetSocketAddress address = (InetSocketAddress) channel.getLocalAddress();
            server = address.getAddress().getHostAddress() + ":" + address.getPort();
        }
        return server;
    }

    @Override
    protected Object decode(
            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

        ChannelBuffer buf = (ChannelBuffer) msg;
        buf.skipBytes(2); // header
        buf.readShort(); // length
        ChannelBuffer id = buf.readBytes(7);
        int command = buf.readUnsignedShort();
        ChannelBuffer response;

        switch (command) {
            case MSG_LOGIN:
                if (channel != null) {
                    response = ChannelBuffers.wrappedBuffer(new byte[] {0x01});
                    sendResponse(channel, remoteAddress, id, MSG_LOGIN_RESPONSE, response);
                }
                return null;
            case MSG_HEARTBEAT:
                if (channel != null) {
                    response = ChannelBuffers.wrappedBuffer(new byte[] {0x01});
                    sendResponse(channel, remoteAddress, id, MSG_HEARTBEAT, response);
                }
                return null;
            case MSG_SERVER:
                if (channel != null) {
                    response = ChannelBuffers.copiedBuffer(
                            getMeiligaoServer(channel), Charset.defaultCharset());
                    sendResponse(channel, remoteAddress, id, MSG_SERVER, response);
                }
                return null;
            case MSG_POSITION:
            case MSG_POSITION_LOGGED:
            case MSG_ALARM:
            case MSG_RFID:
                break;
            default:
                return null;
        }

        Position position = new Position();
        position.setProtocol(getProtocolName());

        // Custom data
        if (command == MSG_ALARM) {
            position.set(Event.KEY_ALARM, buf.readUnsignedByte());
        } else if (command == MSG_POSITION_LOGGED) {
            buf.skipBytes(6);
        }

        if (!identify(id, channel, remoteAddress)) {
            return null;
        }
        position.setDeviceId(getDeviceId());

        if (command == MSG_RFID) {
            for (int i = 0; i < 15; i++) {
                long rfid = buf.readUnsignedInt();
                if (rfid != 0) {
                    String card = String.format("%010d", rfid);
                    position.set("card" + (i + 1), card);
                    position.set(Event.KEY_RFID, card);
                }
            }
        }

        Pattern pattern;
        if (command == MSG_RFID) {
            pattern = PATTERN_RFID;
        } else {
            pattern = PATTERN;
        }

        Parser parser = new Parser(
                pattern, buf.toString(buf.readerIndex(), buf.readableBytes() - 4, Charset.defaultCharset()));
        if (!parser.matches()) {
            return null;
        }

        if (command == MSG_RFID) {

            DateBuilder dateBuilder = new DateBuilder()
                    .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt())
                    .setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
            position.setTime(dateBuilder.getDate());

            position.setValid(true);
            position.setLatitude(parser.nextCoordinate());
            position.setLongitude(parser.nextCoordinate());

        } else {

            DateBuilder dateBuilder = new DateBuilder()
                    .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
            if (parser.hasNext()) {
                dateBuilder.setMillis(parser.nextInt());
            }

            position.setValid(parser.next().equals("A"));
            position.setLatitude(parser.nextCoordinate());
            position.setLongitude(parser.nextCoordinate());

            if (parser.hasNext()) {
                position.setSpeed(parser.nextDouble());
            }

            if (parser.hasNext()) {
                position.setCourse(parser.nextDouble());
            }

            dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
            position.setTime(dateBuilder.getDate());

            position.set(Event.KEY_HDOP, parser.next());

            if (parser.hasNext()) {
                position.setAltitude(parser.nextDouble());
            }

            position.set(Event.KEY_STATUS, parser.next());

            for (int i = 1; i <= 8; i++) {
                if (parser.hasNext()) {
                    position.set(Event.PREFIX_ADC + i, parser.nextInt(16));
                }
            }

            position.set(Event.KEY_CID, parser.next());

            if (parser.hasNext()) {
                position.set(Event.KEY_GSM, parser.nextInt(16));
            }

            if (parser.hasNext()) {
                position.set(Event.KEY_ODOMETER, parser.nextInt(16));
            } else if (parser.hasNext()) {
                position.set(Event.KEY_ODOMETER, parser.nextInt(16));
            }

            if (parser.hasNext()) {
                position.set(Event.KEY_RFID, parser.nextInt(16));
            }

        }

        return position;
    }

}