aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/protocol/BceProtocolDecoder.java
blob: ac8e257e30bbd1632c1c955cfa6b1d594fc7debf (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
/*
 * Copyright 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.nio.ByteOrder;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;

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.Log;
import org.traccar.model.ExtendedInfoFormatter;
import org.traccar.model.Position;

public class BceProtocolDecoder extends BaseProtocolDecoder {

    public BceProtocolDecoder(String protocol) {
        super(protocol);
    }

    private static final int DATA_TYPE = 7;

    private static final int MSG_ASYNC_STACK = 0xA5;
    private static final int MSG_STACK_COFIRM = 0x19;
    private static final int MSG_TIME_TRIGGERED = 0xA0;
    private static final int MSG_OUTPUT_CONTROL = 0x41;
    private static final int MSG_OUTPUT_CONTROL_ACK = 0xC1;

    private static boolean checkBit(int mask, int bit) {
        return (mask & (1 << bit)) != 0;
    }

    @Override
    protected Object decode(
            ChannelHandlerContext ctx, Channel channel, Object msg)
            throws Exception {

        ChannelBuffer buf = (ChannelBuffer) msg;
        
        String imei = String.format("%015d", buf.readLong());
        if (!identify(imei)) {
            return null;
        }

        List<Position> positions = new LinkedList<Position>();

        while (buf.readableBytes() > 1) {

            int dataEnd = buf.readUnsignedShort() + buf.readerIndex();
            int type = buf.readUnsignedByte();
            int confirmKey = buf.readUnsignedByte();

            while (buf.readerIndex() < dataEnd) {

                Position position = new Position();
                ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter(getProtocol());
                position.setDeviceId(getDeviceId());

                int structEnd = buf.readUnsignedByte() + buf.readerIndex();

                long time = buf.readUnsignedInt();
                if ((time & 0x0f) == DATA_TYPE) {

                    time = time >> 4 << 1;
                    time += 0x47798280; // 01/01/2008
                    position.setTime(new Date(time * 1000));

                    // Read masks
                    int mask;
                    List<Integer> masks = new LinkedList<Integer>();
                    do {
                        mask = buf.readUnsignedShort();
                        masks.add(mask);
                    } while (checkBit(mask, 15));

                    mask = masks.get(0);

                    if (checkBit(mask, 0)) {
                        position.setValid(true);
                        position.setLongitude((double) buf.readFloat());
                        position.setLatitude((double) buf.readFloat());
                        position.setSpeed((double) buf.readUnsignedByte());

                        int gps = buf.readUnsignedByte();
                        extendedInfo.set("satellites", gps & 0xf);
                        extendedInfo.set("hdop", gps >> 4);

                        position.setCourse((double) buf.readUnsignedByte());
                        position.setAltitude((double) buf.readUnsignedShort());

                        extendedInfo.set("milage", buf.readUnsignedInt());

                        position.setExtendedInfo(extendedInfo.toString());
                    }

                    if (checkBit(mask, 1)) {
                        extendedInfo.set("input", buf.readUnsignedShort());
                    }

                    for (int i = 1; i <= 8; i++) {
                        if (checkBit(mask, i + 1)) {
                            extendedInfo.set("adc" + i, buf.readUnsignedShort());
                        }
                    }

                    if (checkBit(mask, 10)) buf.skipBytes(4);
                    if (checkBit(mask, 11)) buf.skipBytes(4);
                    if (checkBit(mask, 12)) buf.skipBytes(2);
                    if (checkBit(mask, 13)) buf.skipBytes(2);

                    if (checkBit(mask, 14)) {
                        extendedInfo.set("mcc", buf.readUnsignedShort());
                        extendedInfo.set("mnc", buf.readUnsignedByte());
                        extendedInfo.set("lac", buf.readUnsignedShort());
                        extendedInfo.set("cell", buf.readUnsignedShort());
                        extendedInfo.set("gsm", buf.readUnsignedByte());
                        buf.readUnsignedByte();
                    }

                    if (checkBit(mask, 0)) {
                        positions.add(position);
                    }
                }

                buf.readerIndex(structEnd);
            }

            // Send response
            if (type == MSG_ASYNC_STACK && channel != null) {
                ChannelBuffer response = ChannelBuffers.buffer(ByteOrder.LITTLE_ENDIAN, 8 + 2 + 2 + 1);
                response.writeLong(Long.valueOf(imei));
                response.writeShort(2);
                response.writeByte(MSG_STACK_COFIRM);
                response.writeByte(confirmKey);

                int checksum = 0;
                for (int i = 0; i < response.writerIndex(); i++) {
                    checksum += response.getUnsignedByte(i);
                }
                response.writeByte(checksum);

                channel.write(response);
            }
        }

        return positions;
    }

}