aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/protocol/T800xProtocolDecoder.java
blob: 83d815e0f0626624a3ab1ffa3f31c140d54afbaf (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
/*
 * 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 org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.helper.BitUtil;
import org.traccar.helper.ChannelBufferTools;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Event;
import org.traccar.model.Position;

import java.net.SocketAddress;
import java.nio.ByteOrder;

public class T800xProtocolDecoder extends BaseProtocolDecoder {

    public T800xProtocolDecoder(T800xProtocol protocol) {
        super(protocol);
    }

    private static final int MSG_LOGIN = 0x01;
    private static final int MSG_GPS = 0x02;
    private static final int MSG_HEARTBEAT = 0x03;
    private static final int MSG_ALARM = 0x04;

    private static float readSwappedFloat(ChannelBuffer buf) {
        byte[] bytes = new byte[4];
        buf.readBytes(bytes);
        return ChannelBuffers.wrappedBuffer(ByteOrder.LITTLE_ENDIAN, bytes).readFloat();
    }

    private void sendResponse(Channel channel, int type, ChannelBuffer imei) {
        if (channel != null) {
            ChannelBuffer response = ChannelBuffers.directBuffer(15);
            response.writeByte(0x23);
            response.writeByte(0x23); // header
            response.writeByte(type);
            response.writeShort(response.capacity()); // length
            response.writeShort(0x0001); // index
            response.writeBytes(imei);
            channel.write(response);
        }
    }

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

        ChannelBuffer buf = (ChannelBuffer) msg;

        buf.skipBytes(2);
        int type = buf.readUnsignedByte();
        buf.readUnsignedShort(); // length
        int index = buf.readUnsignedShort();
        ChannelBuffer imei = buf.readBytes(8);

        if (!identify(ChannelBuffers.hexDump(imei).substring(1), channel, remoteAddress)) {
            return null;
        }

        if (type == MSG_LOGIN || type == MSG_ALARM || type == MSG_HEARTBEAT) {
            sendResponse(channel, type, imei);
        }

        if (type == MSG_GPS || type == MSG_ALARM) {

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

            position.set(Event.KEY_INDEX, index);

            buf.readUnsignedShort(); // acc on interval
            buf.readUnsignedShort(); // acc off interval
            buf.readUnsignedByte(); // angle compensation
            buf.readUnsignedShort(); // distance compensation
            buf.readUnsignedShort(); // speed alarm

            int locationStatus = buf.readUnsignedByte();

            buf.readUnsignedByte(); // gsensor manager status
            buf.readUnsignedByte(); // other flags
            buf.readUnsignedByte(); // heartbeat
            buf.readUnsignedByte(); // relay status
            buf.readUnsignedShort(); // drag alarm setting

            int io = buf.readUnsignedShort();
            position.set(Event.KEY_IGNITION, BitUtil.check(io, 14));
            position.set("ac", BitUtil.check(io, 13));

            position.set(Event.PREFIX_ADC + 1, buf.readUnsignedShort());
            position.set(Event.PREFIX_ADC + 2, buf.readUnsignedShort());

            position.set(Event.KEY_ALARM, buf.readUnsignedByte());

            buf.readUnsignedByte(); // reserved

            position.set(Event.KEY_ODOMETER, buf.readUnsignedInt());

            int battery = ChannelBufferTools.readHexInteger(buf, 2);
            if (battery == 0) {
                battery = 100;
            }
            position.set(Event.KEY_BATTERY, battery);

            DateBuilder dateBuilder = new DateBuilder()
                    .setYear(ChannelBufferTools.readHexInteger(buf, 2))
                    .setMonth(ChannelBufferTools.readHexInteger(buf, 2))
                    .setDay(ChannelBufferTools.readHexInteger(buf, 2))
                    .setHour(ChannelBufferTools.readHexInteger(buf, 2))
                    .setMinute(ChannelBufferTools.readHexInteger(buf, 2))
                    .setSecond(ChannelBufferTools.readHexInteger(buf, 2));

            if (BitUtil.check(locationStatus, 6)) {

                position.setValid(!BitUtil.check(locationStatus, 7));
                position.setTime(dateBuilder.getDate());
                position.setAltitude(readSwappedFloat(buf));
                position.setLongitude(readSwappedFloat(buf));
                position.setLatitude(readSwappedFloat(buf));
                position.setSpeed(UnitsConverter.knotsFromKph(
                        ChannelBufferTools.readHexInteger(buf, 4) * 0.1));
                position.setCourse(buf.readUnsignedShort());

            } else {

                getLastLocation(position, dateBuilder.getDate());

                byte[] array = new byte[16];
                buf.readBytes(array);
                ChannelBuffer swapped = ChannelBuffers.wrappedBuffer(ByteOrder.LITTLE_ENDIAN, array);

                position.set(Event.KEY_MCC, swapped.readUnsignedShort());
                position.set(Event.KEY_MNC, swapped.readUnsignedShort());
                position.set(Event.KEY_LAC, swapped.readUnsignedShort());
                position.set(Event.KEY_CID, swapped.readUnsignedShort());

                // two more cell towers

            }

            return position;

        }

        return null;
    }

}