aboutsummaryrefslogtreecommitdiff
path: root/src/main/java/org/traccar/protocol/PebbellProtocolDecoder.java
blob: 7271c60d84b3227d960184186c783a842c00b6e7 (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
/*
 * Copyright 2019 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.UnitsConverter;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;
import org.traccar.model.WifiAccessPoint;

import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;

public class PebbellProtocolDecoder extends BaseProtocolDecoder {

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

    public static final int MSG_DATA = 0x01;

    private String decodeAlarm(int code) {
        if (BitUtil.check(code, 0)) {
            return Position.ALARM_LOW_BATTERY;
        }
        if (BitUtil.check(code, 1)) {
            return Position.ALARM_OVERSPEED;
        }
        if (BitUtil.check(code, 2)) {
            return Position.ALARM_FALL_DOWN;
        }
        if (BitUtil.check(code, 8)) {
            return Position.ALARM_POWER_OFF;
        }
        if (BitUtil.check(code, 9)) {
            return Position.ALARM_POWER_ON;
        }
        if (BitUtil.check(code, 12)) {
            return Position.ALARM_SOS;
        }
        return null;
    }

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

        ByteBuf buf = (ByteBuf) msg;

        buf.readUnsignedByte(); // header
        buf.readUnsignedByte(); // properties
        buf.readUnsignedShortLE(); // length
        buf.readUnsignedShortLE(); // checksum
        buf.readUnsignedShortLE(); // index
        int type = buf.readUnsignedByte();

        if (type == MSG_DATA) {

            Position position = new Position(getProtocolName());

            while (buf.isReadable()) {
                int endIndex = buf.readUnsignedByte() + buf.readerIndex();
                int key = buf.readUnsignedByte();
                switch (key) {
                    case 0x01:
                        DeviceSession deviceSession = getDeviceSession(
                                channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII));
                        if (deviceSession == null) {
                            return null;
                        }
                        position.setDeviceId(deviceSession.getDeviceId());
                        break;
                    case 0x02:
                        position.set(Position.KEY_ALARM, decodeAlarm(buf.readIntLE()));
                        break;
                    case 0x20:
                        position.setLatitude(buf.readIntLE() * 0.0000001);
                        position.setLongitude(buf.readIntLE() * 0.0000001);
                        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));
                        position.setCourse(buf.readUnsignedShortLE());
                        position.setAltitude(buf.readShortLE());
                        position.setValid(buf.readUnsignedShortLE() > 0);
                        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
                        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
                        break;
                    case 0x21:
                        int mcc = buf.readUnsignedShortLE();
                        int mnc = buf.readUnsignedByte();
                        if (position.getNetwork() == null) {
                            position.setNetwork(new Network());
                        }
                        while (buf.readerIndex() < endIndex) {
                            int rssi = buf.readByte();
                            position.getNetwork().addCellTower(CellTower.from(
                                    mcc, mnc, buf.readUnsignedShortLE(), buf.readUnsignedShortLE(), rssi));
                        }
                        break;
                    case 0x22:
                        if (position.getNetwork() == null) {
                            position.setNetwork(new Network());
                        }
                        while (buf.readerIndex() < endIndex) {
                            int rssi = buf.readByte();
                            String mac = ByteBufUtil.hexDump(buf.readSlice(6)).replaceAll("(..)", "$1:");
                            position.getNetwork().addWifiAccessPoint(WifiAccessPoint.from(
                                    mac.substring(0, mac.length() - 1), rssi));
                        }
                        break;
                    case 0x40:
                        buf.readUnsignedIntLE(); // timestamp
                        int heartRate = buf.readUnsignedByte();
                        if (heartRate > 1) {
                            position.set(Position.KEY_HEART_RATE, heartRate);
                        }
                        break;
                    default:
                        break;
                }
                buf.readerIndex(endIndex);
            }

            if (!position.getAttributes().containsKey(Position.KEY_SATELLITES)) {
                getLastLocation(position, null);
            }

            return position.getDeviceId() > 0 ? position : null;

        }

        return null;
    }

}