aboutsummaryrefslogtreecommitdiff
path: root/src/main/java/org/traccar/protocol/PacificTrackProtocolDecoder.java
blob: ea0966a5dea8a62633e0e9c1d81410b5be0f2559 (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
/*
 * Copyright 2019 - 2020 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 io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;

import java.net.SocketAddress;

public class PacificTrackProtocolDecoder extends BaseProtocolDecoder {

    public PacificTrackProtocolDecoder(Protocol protocol) {
        super(protocol);
    }

    public static int readBitExt(ByteBuf buf) {
        int result = 0;
        while (buf.isReadable()) {
            int b = buf.readUnsignedByte();
            result <<= 7;
            result += BitUtil.to(b, 7);
            if (BitUtil.check(b, 7)) {
                break;
            }
        }
        return result;
    }

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

        ByteBuf buf = (ByteBuf) msg;

        buf.readByte(); // frame start
        readBitExt(buf); // frame control
        readBitExt(buf); // frame length

        DeviceSession deviceSession = null;
        Position position = new Position(getProtocolName());

        while (buf.isReadable()) {

            int segmentId = readBitExt(buf);
            int segmentEnd = readBitExt(buf) + buf.readerIndex();

            switch (segmentId) {
                case 0x01:
                    position.set(Position.KEY_EVENT, readBitExt(buf));
                    break;
                case 0x10:
                    position.setValid(BitUtil.check(buf.readUnsignedByte(), 4));
                    int date = buf.readUnsignedByte();
                    DateBuilder dateBuilder = new DateBuilder()
                            .setDate(2020 + BitUtil.from(date, 4), BitUtil.to(date, 4), buf.readUnsignedByte())
                            .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
                    position.setTime(dateBuilder.getDate());
                    position.setLatitude(buf.readUnsignedInt() / 1000000.0 - 90.0);
                    position.setLongitude(buf.readUnsignedInt() / 1000000.0 - 180.0);
                    int speedAndCourse = buf.readUnsignedMedium();
                    position.setCourse(BitUtil.from(speedAndCourse, 12));
                    position.setSpeed(UnitsConverter.knotsFromKph(BitUtil.to(speedAndCourse, 12) * 0.1));
                    position.set(Position.KEY_INDEX, buf.readUnsignedShort());
                    break;
                case 0x92:
                    while (buf.readerIndex() < segmentEnd) {
                        int field = buf.readUnsignedByte();
                        int fieldPrefix = BitUtil.from(field, 5);
                        if (fieldPrefix < 0b100) {
                            switch (BitUtil.between(field, 2, 5)) {
                                case 0b000:
                                    position.set("bus", BitUtil.to(field, 2));
                                    break;
                                case 0b001:
                                    position.set("currentGear", BitUtil.to(field, 2));
                                    break;
                                default:
                                    break;
                            }
                        } else if (fieldPrefix < 0b101) {
                            switch (BitUtil.to(field, 5)) {
                                case 0b00000:
                                    position.set(Position.KEY_OBD_SPEED, buf.readUnsignedByte());
                                    break;
                                case 0b00001:
                                    position.set(Position.KEY_RPM, buf.readUnsignedByte() * 32);
                                    break;
                                case 0b01001:
                                    position.set("defLevel", buf.readUnsignedByte() * 0.4);
                                    break;
                                case 0b01010:
                                    position.set(Position.KEY_ENGINE_LOAD, buf.readUnsignedByte());
                                    break;
                                case 0b01011:
                                    position.set("barometer", buf.readUnsignedByte() * 0.5);
                                    break;
                                default:
                                    buf.readUnsignedByte();
                                    break;
                            }
                        } else if (fieldPrefix < 0b110) {
                            switch (BitUtil.to(field, 5)) {
                                case 0b00010:
                                    position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedShort() / 512.0);
                                    break;
                                case 0b00011:
                                    position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedShort() * 0.03125 - 273);
                                    break;
                                default:
                                    buf.readUnsignedShort();
                                    break;
                            }
                        }  else if (fieldPrefix < 0b111) {
                            switch (BitUtil.to(field, 5)) {
                                case 0b00000:
                                    position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 100);
                                    break;
                                case 0b00001:
                                    position.set(Position.KEY_HOURS, buf.readUnsignedInt() * 180);
                                    break;
                                case 0b00010:
                                    position.set("idleHours", buf.readUnsignedInt() * 180);
                                    break;
                                case 0b00100:
                                    position.set(Position.KEY_FUEL_USED, buf.readUnsignedInt() * 0.5);
                                    break;
                                case 0b00101:
                                    position.set("fuelUsedIdle", buf.readUnsignedInt() * 0.5);
                                    break;
                                default:
                                    buf.readUnsignedInt();
                                    break;
                            }
                        } else {
                            buf.skipBytes(buf.readUnsignedByte());
                        }
                    }
                    break;
                case 0x100:
                    String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(0, 15);
                    deviceSession = getDeviceSession(channel, remoteAddress, imei);
                    break;
                default:
                    buf.readerIndex(segmentEnd);
                    break;
            }
        }

        if (deviceSession == null) {
            deviceSession = getDeviceSession(channel, remoteAddress);
        }

        if (deviceSession != null) {
            position.setDeviceId(deviceSession.getDeviceId());
            if (position.getFixTime() == null) {
                getLastLocation(position, null);
            }
            return position;
        } else {
            return null;
        }
    }

}