Example usage for io.netty.buffer ByteBuf readSlice

List of usage examples for io.netty.buffer ByteBuf readSlice

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Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf readSlice.

Prototype

public abstract ByteBuf readSlice(int length);

Source Link

Document

Returns a new slice of this buffer's sub-region starting at the current readerIndex and increases the readerIndex by the size of the new slice (= length ).

Usage

From source file:org.traccar.protocol.RecodaProtocolDecoder.java

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    int type = buf.readIntLE();
    buf.readUnsignedIntLE(); // length

    if (type != MSG_HEARTBEAT) {
        buf.readUnsignedShortLE(); // version
        buf.readUnsignedShortLE(); // index
    }//from w w  w  . java  2  s  . c o  m

    if (type == MSG_SIGNAL_LINK_REGISTRATION) {

        getDeviceSession(channel, remoteAddress, buf.readSlice(12).toString(StandardCharsets.US_ASCII));

    } else if (type == MSG_GPS_DATA) {

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

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

        position.setTime(new Date(buf.readLongLE()));

        int flags = buf.readUnsignedByte();

        if (BitUtil.check(flags, 0)) {

            buf.readUnsignedShortLE(); // declination

            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));

            position.setLongitude(buf.readUnsignedByte() + buf.readUnsignedByte() / 60.0);
            position.setLatitude(buf.readUnsignedByte() + buf.readUnsignedByte() / 60.0);

            position.setLongitude(position.getLongitude() + buf.readUnsignedIntLE() / 3600.0);
            position.setLatitude(position.getLatitude() + buf.readUnsignedIntLE() / 3600.0);

            int status = buf.readUnsignedByte();

            position.setValid(BitUtil.check(status, 0));
            if (BitUtil.check(status, 1)) {
                position.setLongitude(-position.getLongitude());
            }
            if (!BitUtil.check(status, 2)) {
                position.setLatitude(-position.getLatitude());
            }

        } else {

            getLastLocation(position, position.getDeviceTime());

        }

        return position;

    }

    return null;
}

From source file:org.traccar.protocol.RoboTrackProtocolDecoder.java

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    int type = buf.readUnsignedByte();

    if (type == MSG_ID) {

        buf.skipBytes(16); // name

        String imei = buf.readSlice(15).toString(StandardCharsets.US_ASCII);

        if (getDeviceSession(channel, remoteAddress, imei) != null && channel != null) {
            ByteBuf response = Unpooled.buffer();
            response.writeByte(MSG_ACK);
            response.writeByte(0x01); // success
            response.writeByte(0x66); // checksum
            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
        }/*from  ww  w .  j a v a 2s  .  co m*/

    } else if (type == MSG_GPS || type == MSG_GSM) {

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

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

        position.setDeviceTime(new Date(buf.readUnsignedIntLE() * 1000));

        if (type == MSG_GPS) {

            position.setValid(true);
            position.setFixTime(position.getDeviceTime());
            position.setLatitude(buf.readIntLE() * 0.000001);
            position.setLongitude(buf.readIntLE() * 0.000001);
            position.setSpeed(UnitsConverter.knotsFromKph(buf.readByte()));

        } else {

            getLastLocation(position, position.getDeviceTime());

            position.setNetwork(new Network(CellTower.from(buf.readUnsignedShortLE(), buf.readUnsignedShortLE(),
                    buf.readUnsignedShortLE(), buf.readUnsignedShortLE())));

            buf.readUnsignedByte(); // reserved

        }

        int value = buf.readUnsignedByte();

        position.set(Position.KEY_SATELLITES, BitUtil.to(value, 4));
        position.set(Position.KEY_RSSI, BitUtil.between(value, 4, 7));
        position.set(Position.KEY_MOTION, BitUtil.check(value, 7));

        value = buf.readUnsignedByte();

        position.set(Position.KEY_CHARGE, BitUtil.check(value, 0));

        for (int i = 1; i <= 4; i++) {
            position.set(Position.PREFIX_IN + i, BitUtil.check(value, i));
        }

        position.set(Position.KEY_BATTERY_LEVEL, BitUtil.from(value, 5) * 100 / 7);
        position.set(Position.KEY_DEVICE_TEMP, buf.readByte());

        for (int i = 1; i <= 3; i++) {
            position.set(Position.PREFIX_ADC + i, buf.readUnsignedShortLE());
        }

        return position;

    }

    return null;
}

From source file:org.traccar.protocol.RuptelaProtocolDecoder.java

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    buf.readUnsignedShort(); // data length

    String imei = String.format("%015d", buf.readLong());
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
    if (deviceSession == null) {
        return null;
    }//from  ww  w  .ja v  a2 s  . c  o m

    int type = buf.readUnsignedByte();

    if (type == MSG_RECORDS || type == MSG_EXTENDED_RECORDS) {

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

        buf.readUnsignedByte(); // records left
        int count = buf.readUnsignedByte();

        for (int i = 0; i < count; i++) {
            Position position = new Position(getProtocolName());
            position.setDeviceId(deviceSession.getDeviceId());

            position.setTime(new Date(buf.readUnsignedInt() * 1000));
            buf.readUnsignedByte(); // timestamp extension

            if (type == MSG_EXTENDED_RECORDS) {
                buf.readUnsignedByte(); // record extension
            }

            buf.readUnsignedByte(); // priority (reserved)

            position.setValid(true);
            position.setLongitude(buf.readInt() / 10000000.0);
            position.setLatitude(buf.readInt() / 10000000.0);
            position.setAltitude(buf.readUnsignedShort() / 10.0);
            position.setCourse(buf.readUnsignedShort() / 100.0);

            position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());

            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));

            position.set(Position.KEY_HDOP, buf.readUnsignedByte() / 10.0);

            if (type == MSG_EXTENDED_RECORDS) {
                position.set(Position.KEY_EVENT, buf.readUnsignedShort());
            } else {
                position.set(Position.KEY_EVENT, buf.readUnsignedByte());
            }

            // Read 1 byte data
            int cnt = buf.readUnsignedByte();
            for (int j = 0; j < cnt; j++) {
                int id = type == MSG_EXTENDED_RECORDS ? buf.readUnsignedShort() : buf.readUnsignedByte();
                decodeParameter(position, id, buf, 1);
            }

            // Read 2 byte data
            cnt = buf.readUnsignedByte();
            for (int j = 0; j < cnt; j++) {
                int id = type == MSG_EXTENDED_RECORDS ? buf.readUnsignedShort() : buf.readUnsignedByte();
                decodeParameter(position, id, buf, 2);
            }

            // Read 4 byte data
            cnt = buf.readUnsignedByte();
            for (int j = 0; j < cnt; j++) {
                int id = type == MSG_EXTENDED_RECORDS ? buf.readUnsignedShort() : buf.readUnsignedByte();
                decodeParameter(position, id, buf, 4);
            }

            // Read 8 byte data
            cnt = buf.readUnsignedByte();
            for (int j = 0; j < cnt; j++) {
                int id = type == MSG_EXTENDED_RECORDS ? buf.readUnsignedShort() : buf.readUnsignedByte();
                decodeParameter(position, id, buf, 8);
            }

            Long driverIdPart1 = (Long) position.getAttributes().remove(Position.PREFIX_IO + 126);
            Long driverIdPart2 = (Long) position.getAttributes().remove(Position.PREFIX_IO + 127);
            if (driverIdPart1 != null && driverIdPart2 != null) {
                ByteBuf driverId = Unpooled.copyLong(driverIdPart1, driverIdPart2);
                position.set(Position.KEY_DRIVER_UNIQUE_ID, driverId.toString(StandardCharsets.US_ASCII));
                driverId.release();
            }

            positions.add(position);
        }

        if (channel != null) {
            channel.writeAndFlush(new NetworkMessage(
                    Unpooled.wrappedBuffer(DataConverter.parseHex("0002640113bc")), remoteAddress));
        }

        return positions;

    } else if (type == MSG_DTCS) {

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

        int count = buf.readUnsignedByte();

        for (int i = 0; i < count; i++) {
            Position position = new Position(getProtocolName());
            position.setDeviceId(deviceSession.getDeviceId());

            buf.readUnsignedByte(); // reserved

            position.setTime(new Date(buf.readUnsignedInt() * 1000));

            position.setValid(true);
            position.setLongitude(buf.readInt() / 10000000.0);
            position.setLatitude(buf.readInt() / 10000000.0);

            if (buf.readUnsignedByte() == 2) {
                position.set(Position.KEY_ARCHIVE, true);
            }

            position.set(Position.KEY_DTCS, buf.readSlice(5).toString(StandardCharsets.US_ASCII));

            positions.add(position);
        }

        if (channel != null) {
            channel.writeAndFlush(new NetworkMessage(
                    Unpooled.wrappedBuffer(DataConverter.parseHex("00026d01c4a4")), remoteAddress));
        }

        return positions;

    } else {

        return decodeCommandResponse(deviceSession, type, buf);

    }
}

From source file:org.traccar.protocol.SmokeyProtocolDecoder.java

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    buf.skipBytes(2); // header
    buf.readUnsignedByte(); // protocol version

    int type = buf.readUnsignedByte();

    ByteBuf id = buf.readSlice(8);
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, ByteBufUtil.hexDump(id));
    if (deviceSession == null) {
        return null;
    }/*ww  w.  jav  a 2s  .c  o  m*/

    if (type == MSG_DATE_RECORD) {

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

        position.set(Position.KEY_VERSION_FW, buf.readUnsignedShort());

        int status = buf.readUnsignedShort();
        position.set(Position.KEY_STATUS, status);

        DateBuilder dateBuilder = new DateBuilder().setDate(2000, 1, 1).addSeconds(buf.readUnsignedInt());

        getLastLocation(position, dateBuilder.getDate());

        int index = buf.readUnsignedByte();
        position.set(Position.KEY_INDEX, index);

        int report = buf.readUnsignedShort();

        buf.readUnsignedShort(); // length

        position.set(Position.KEY_BATTERY, buf.readUnsignedShort());

        Network network = new Network();

        if (report != 0x0203) {

            int count = 1;
            if (report != 0x0200) {
                count = buf.readUnsignedByte();
            }

            for (int i = 0; i < count; i++) {
                int mcc = buf.readUnsignedShort();
                int mnc = buf.readUnsignedShort();
                int lac = buf.readUnsignedShort();
                int cid = buf.readUnsignedShort();
                if (i == 0) {
                    buf.readByte(); // timing advance
                }
                int rssi = buf.readByte();
                network.addCellTower(CellTower.from(mcc, mnc, lac, cid, rssi));
            }

        }

        if (report == 0x0202 || report == 0x0203) {

            int count = buf.readUnsignedByte();

            for (int i = 0; i < count; i++) {
                buf.readerIndex(buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0) + 1); // ssid

                String mac = String.format("%02x:%02x:%02x:%02x:%02x:%02x", buf.readUnsignedByte(),
                        buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte(),
                        buf.readUnsignedByte(), buf.readUnsignedByte());

                network.addWifiAccessPoint(WifiAccessPoint.from(mac, buf.readByte()));
            }

        }

        position.setNetwork(network);

        sendResponse(channel, remoteAddress, id, index, report);

        return position;

    }

    return null;
}

From source file:org.traccar.protocol.T800xProtocolDecoder.java

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    short header = buf.readShort();
    int type = buf.readUnsignedByte();
    buf.readUnsignedShort(); // length
    int index = buf.readUnsignedShort();
    ByteBuf imei = buf.readSlice(8);

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress,
            ByteBufUtil.hexDump(imei).substring(1));
    if (deviceSession == null) {
        return null;
    }//  w  ww.  j  a v a 2s.co m

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

        return decodePosition(channel, deviceSession, buf, header, type, index, imei);

    } else if (type == MSG_COMMAND) {

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

        getLastLocation(position, null);

        buf.readUnsignedByte(); // protocol number

        position.set(Position.KEY_RESULT, buf.toString(StandardCharsets.UTF_16LE));

        sendResponse(channel, header, type, index, imei, 0);

        return position;

    }

    sendResponse(channel, header, type, index, imei, 0);

    return null;
}

From source file:org.traccar.protocol.TeltonikaProtocolDecoder.java

License:Apache License

private void decodeSerial(Channel channel, SocketAddress remoteAddress, Position position, ByteBuf buf) {

    getLastLocation(position, null);//from   w  w  w.  j  a  v  a2s. c om

    int type = buf.readUnsignedByte();
    if (type == 0x0D) {

        buf.readInt(); // length
        int subtype = buf.readUnsignedByte();
        if (subtype == 0x01) {

            long photoId = buf.readUnsignedInt();
            ByteBuf photo = Unpooled.buffer(buf.readInt());
            photos.put(photoId, photo);
            sendImageRequest(channel, remoteAddress, photoId, 0, Math.min(IMAGE_PACKET_MAX, photo.capacity()));

        } else if (subtype == 0x02) {

            long photoId = buf.readUnsignedInt();
            buf.readInt(); // offset
            ByteBuf photo = photos.get(photoId);
            photo.writeBytes(buf, buf.readUnsignedShort());
            if (photo.writableBytes() > 0) {
                sendImageRequest(channel, remoteAddress, photoId, photo.writerIndex(),
                        Math.min(IMAGE_PACKET_MAX, photo.writableBytes()));
            } else {
                String uniqueId = Context.getIdentityManager().getById(position.getDeviceId()).getUniqueId();
                photos.remove(photoId);
                try {
                    position.set(Position.KEY_IMAGE,
                            Context.getMediaManager().writeFile(uniqueId, photo, "jpg"));
                } finally {
                    photo.release();
                }
            }

        }

    } else {

        position.set(Position.KEY_TYPE, type);

        int length = buf.readInt();
        boolean readable = true;
        for (int i = 0; i < length; i++) {
            byte b = buf.getByte(buf.readerIndex() + i);
            if (b < 32 && b != '\r' && b != '\n') {
                readable = false;
                break;
            }
        }

        if (readable) {
            position.set(Position.KEY_RESULT, buf.readSlice(length).toString(StandardCharsets.US_ASCII));
        } else {
            position.set(Position.KEY_RESULT, ByteBufUtil.hexDump(buf.readSlice(length)));
        }
    }
}

From source file:org.traccar.protocol.TeltonikaProtocolDecoder.java

License:Apache License

private void decodeOtherParameter(Position position, int id, ByteBuf buf, int length) {
    switch (id) {
    case 1:/* ww  w  . j  av a 2 s. com*/
    case 2:
    case 3:
    case 4:
        position.set("di" + id, readValue(buf, length, false));
        break;
    case 9:
        position.set(Position.PREFIX_ADC + 1, readValue(buf, length, false));
        break;
    case 17:
        position.set("axisX", readValue(buf, length, true));
        break;
    case 18:
        position.set("axisY", readValue(buf, length, true));
        break;
    case 19:
        position.set("axisZ", readValue(buf, length, true));
        break;
    case 21:
        position.set(Position.KEY_RSSI, readValue(buf, length, false));
        break;
    case 25:
    case 26:
    case 27:
    case 28:
        position.set(Position.PREFIX_TEMP + (id - 24), readValue(buf, length, true) * 0.1);
        break;
    case 66:
        position.set(Position.KEY_POWER, readValue(buf, length, false) * 0.001);
        break;
    case 67:
        position.set(Position.KEY_BATTERY, readValue(buf, length, false) * 0.001);
        break;
    case 69:
        position.set("gpsStatus", readValue(buf, length, false));
        break;
    case 72:
    case 73:
    case 74:
        position.set(Position.PREFIX_TEMP + (id - 71), readValue(buf, length, true) * 0.1);
        break;
    case 78:
        long driverUniqueId = readValue(buf, length, false);
        if (driverUniqueId != 0) {
            position.set(Position.KEY_DRIVER_UNIQUE_ID, String.format("%016X", driverUniqueId));
        }
        break;
    case 80:
        position.set("workMode", readValue(buf, length, false));
        break;
    case 129:
    case 130:
    case 131:
    case 132:
    case 133:
    case 134:
        String driver = id == 129 || id == 132 ? "" : position.getString("driver1");
        position.set("driver" + (id >= 132 ? 2 : 1),
                driver + buf.readSlice(length).toString(StandardCharsets.US_ASCII).trim());
        break;
    case 179:
        position.set(Position.PREFIX_OUT + 1, readValue(buf, length, false) == 1);
        break;
    case 180:
        position.set(Position.PREFIX_OUT + 2, readValue(buf, length, false) == 1);
        break;
    case 181:
        position.set(Position.KEY_PDOP, readValue(buf, length, false) * 0.1);
        break;
    case 182:
        position.set(Position.KEY_HDOP, readValue(buf, length, false) * 0.1);
        break;
    case 236:
        if (readValue(buf, length, false) == 1) {
            position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
        }
        break;
    case 237:
        position.set(Position.KEY_MOTION, readValue(buf, length, false) == 0);
        break;
    case 238:
        switch ((int) readValue(buf, length, false)) {
        case 1:
            position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
            break;
        case 2:
            position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
            break;
        case 3:
            position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
            break;
        default:
            break;
        }
        break;
    case 239:
        position.set(Position.KEY_IGNITION, readValue(buf, length, false) == 1);
        break;
    case 240:
        position.set(Position.KEY_MOTION, readValue(buf, length, false) == 1);
        break;
    case 241:
        position.set(Position.KEY_OPERATOR, readValue(buf, length, false));
        break;
    default:
        position.set(Position.PREFIX_IO + id, readValue(buf, length, false));
        break;
    }
}

From source file:org.traccar.protocol.TeltonikaProtocolDecoder.java

License:Apache License

private void decodeLocation(Position position, ByteBuf buf, int codec) {

    int globalMask = 0x0f;

    if (codec == CODEC_GH3000) {

        long time = buf.readUnsignedInt() & 0x3fffffff;
        time += 1167609600; // 2007-01-01 00:00:00

        globalMask = buf.readUnsignedByte();
        if (BitUtil.check(globalMask, 0)) {

            position.setTime(new Date(time * 1000));

            int locationMask = buf.readUnsignedByte();

            if (BitUtil.check(locationMask, 0)) {
                position.setLatitude(buf.readFloat());
                position.setLongitude(buf.readFloat());
            }//from  w ww .j  a va2 s .  c o  m

            if (BitUtil.check(locationMask, 1)) {
                position.setAltitude(buf.readUnsignedShort());
            }

            if (BitUtil.check(locationMask, 2)) {
                position.setCourse(buf.readUnsignedByte() * 360.0 / 256);
            }

            if (BitUtil.check(locationMask, 3)) {
                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
            }

            if (BitUtil.check(locationMask, 4)) {
                position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
            }

            if (BitUtil.check(locationMask, 5)) {
                CellTower cellTower = CellTower.fromLacCid(buf.readUnsignedShort(), buf.readUnsignedShort());

                if (BitUtil.check(locationMask, 6)) {
                    cellTower.setSignalStrength((int) buf.readUnsignedByte());
                }

                if (BitUtil.check(locationMask, 7)) {
                    cellTower.setOperator(buf.readUnsignedInt());
                }

                position.setNetwork(new Network(cellTower));

            } else {
                if (BitUtil.check(locationMask, 6)) {
                    position.set(Position.KEY_RSSI, buf.readUnsignedByte());
                }
                if (BitUtil.check(locationMask, 7)) {
                    position.set(Position.KEY_OPERATOR, buf.readUnsignedInt());
                }
            }

        } else {

            getLastLocation(position, new Date(time * 1000));

        }

    } else {

        position.setTime(new Date(buf.readLong()));

        position.set("priority", buf.readUnsignedByte());

        position.setLongitude(buf.readInt() / 10000000.0);
        position.setLatitude(buf.readInt() / 10000000.0);
        position.setAltitude(buf.readShort());
        position.setCourse(buf.readUnsignedShort());

        int satellites = buf.readUnsignedByte();
        position.set(Position.KEY_SATELLITES, satellites);

        position.setValid(satellites != 0);

        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));

        position.set(Position.KEY_EVENT, readExtByte(buf, codec, CODEC_8_EXT, CODEC_16));
        if (codec == CODEC_16) {
            buf.readUnsignedByte(); // generation type
        }

        readExtByte(buf, codec, CODEC_8_EXT); // total IO data records

    }

    // Read 1 byte data
    if (BitUtil.check(globalMask, 1)) {
        int cnt = readExtByte(buf, codec, CODEC_8_EXT);
        for (int j = 0; j < cnt; j++) {
            decodeParameter(position, readExtByte(buf, codec, CODEC_8_EXT, CODEC_16), buf, 1, codec);
        }
    }

    // Read 2 byte data
    if (BitUtil.check(globalMask, 2)) {
        int cnt = readExtByte(buf, codec, CODEC_8_EXT);
        for (int j = 0; j < cnt; j++) {
            decodeParameter(position, readExtByte(buf, codec, CODEC_8_EXT, CODEC_16), buf, 2, codec);
        }
    }

    // Read 4 byte data
    if (BitUtil.check(globalMask, 3)) {
        int cnt = readExtByte(buf, codec, CODEC_8_EXT);
        for (int j = 0; j < cnt; j++) {
            decodeParameter(position, readExtByte(buf, codec, CODEC_8_EXT, CODEC_16), buf, 4, codec);
        }
    }

    // Read 8 byte data
    if (codec == CODEC_8 || codec == CODEC_8_EXT || codec == CODEC_16) {
        int cnt = readExtByte(buf, codec, CODEC_8_EXT);
        for (int j = 0; j < cnt; j++) {
            decodeOtherParameter(position, readExtByte(buf, codec, CODEC_8_EXT, CODEC_16), buf, 8);
        }
    }

    // Read 16 byte data
    if (extended) {
        int cnt = readExtByte(buf, codec, CODEC_8_EXT);
        for (int j = 0; j < cnt; j++) {
            int id = readExtByte(buf, codec, CODEC_8_EXT, CODEC_16);
            position.set(Position.PREFIX_IO + id, ByteBufUtil.hexDump(buf.readSlice(16)));
        }
    }

    // Read X byte data
    if (codec == CODEC_8_EXT) {
        int cnt = buf.readUnsignedShort();
        for (int j = 0; j < cnt; j++) {
            int id = buf.readUnsignedShort();
            int length = buf.readUnsignedShort();
            if (id == 256) {
                position.set(Position.KEY_VIN, buf.readSlice(length).toString(StandardCharsets.US_ASCII));
            } else {
                position.set(Position.PREFIX_IO + id, ByteBufUtil.hexDump(buf.readSlice(length)));
            }
        }
    }

    decodeNetwork(position);

}

From source file:org.traccar.protocol.TeltonikaProtocolDecoder.java

License:Apache License

private Object decodeUdp(Channel channel, SocketAddress remoteAddress, ByteBuf buf) throws Exception {

    buf.readUnsignedShort(); // length
    buf.readUnsignedShort(); // packet id
    buf.readUnsignedByte(); // packet type
    int locationPacketId = buf.readUnsignedByte();
    String imei = buf.readSlice(buf.readUnsignedShort()).toString(StandardCharsets.US_ASCII);

    return parseData(channel, remoteAddress, buf, locationPacketId, imei);

}

From source file:org.traccar.protocol.ThinkRaceProtocolDecoder.java

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    buf.skipBytes(2); // header
    ByteBuf id = buf.readSlice(12);
    buf.readUnsignedByte(); // separator
    int type = buf.readUnsignedByte();
    buf.readUnsignedShort(); // length

    if (type == MSG_LOGIN) {

        int command = buf.readUnsignedByte(); // 0x00 - heartbeat

        if (command == 0x01) {
            String imei = buf.toString(buf.readerIndex(), 15, StandardCharsets.US_ASCII);
            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
            if (deviceSession != null && channel != null) {
                ByteBuf response = Unpooled.buffer();
                response.writeByte(0x48);
                response.writeByte(0x52); // header
                response.writeBytes(id);
                response.writeByte(0x2c); // separator
                response.writeByte(type);
                response.writeShort(0x0002); // length
                response.writeShort(0x8000);
                response.writeShort(0x0000); // checksum
                channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
            }/*w w  w .j  ava 2s . com*/
        }

    } else if (type == MSG_GPS) {

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

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

        position.setTime(new Date(buf.readUnsignedInt() * 1000));

        int flags = buf.readUnsignedByte();

        position.setValid(true);
        position.setLatitude(convertCoordinate(buf.readUnsignedInt(), !BitUtil.check(flags, 0)));
        position.setLongitude(convertCoordinate(buf.readUnsignedInt(), !BitUtil.check(flags, 1)));

        position.setSpeed(buf.readUnsignedByte());
        position.setCourse(buf.readUnsignedByte());

        position.setNetwork(
                new Network(CellTower.fromLacCid(buf.readUnsignedShort(), buf.readUnsignedShort())));

        return position;

    }

    return null;
}