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.Tk102ProtocolDecoder.java

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    buf.skipBytes(1); // header
    int type = buf.readUnsignedByte();
    ByteBuf dataSequence = buf.readSlice(10);
    int length = buf.readUnsignedByte();

    if (type == MSG_LOGIN_REQUEST || type == MSG_LOGIN_REQUEST_2) {

        ByteBuf data = buf.readSlice(length);

        String id;/* ww  w .ja  v a2  s.c  o m*/
        if (type == MSG_LOGIN_REQUEST) {
            id = data.toString(StandardCharsets.US_ASCII);
        } else {
            id = data.copy(1, 15).toString(StandardCharsets.US_ASCII);
        }

        if (getDeviceSession(channel, remoteAddress, id) != null) {
            ByteBuf response = Unpooled.buffer();
            response.writeByte(MODE_GPRS);
            response.writeBytes(data);
            sendResponse(channel, MSG_LOGIN_RESPONSE, dataSequence, response);
        }

    } else if (type == MSG_HEARTBEAT_REQUEST) {

        sendResponse(channel, MSG_HEARTBEAT_RESPONSE, dataSequence, buf.readRetainedSlice(length));

    } else {

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

        Parser parser = new Parser(PATTERN, buf.readSlice(length).toString(StandardCharsets.US_ASCII));
        if (!parser.matches()) {
            return null;
        }

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

        DateBuilder dateBuilder = new DateBuilder().setTime(parser.nextInt(0), parser.nextInt(0),
                parser.nextInt(0));

        position.setValid(parser.next().equals("A"));
        position.setLatitude(parser.nextCoordinate());
        position.setLongitude(parser.nextCoordinate());
        position.setSpeed(parser.nextDouble(0));

        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
        position.setTime(dateBuilder.getDate());

        return position;

    }

    return null;
}

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

License:Apache License

private String readArgument(ByteBuf buf) {
    return buf.readSlice(buf.readUnsignedByte()).toString(StandardCharsets.US_ASCII);
}

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

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    String type = buf.readSlice(2).toString(StandardCharsets.US_ASCII);

    if (channel != null) {
        switch (type) {
        case "0A":
        case "0C":
            sendResponse(channel, remoteAddress, type);
            break;
        case "0B":
            sendResponse(channel, remoteAddress, type, "1482202689", "10", "20", "15");
            break;
        case "0E":
        case "0F":
            sendResponse(channel, remoteAddress, type, "30", "Unknown");
            break;
        default:/*from  ww w  .ja v a2 s.c  om*/
            break;
        }
    }

    if (type.equals("0E")) {

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

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

        position.setValid(true);
        position.setTime(new Date(Long.parseLong(readArgument(buf)) * 1000));

        readArgument(buf); // location identifier

        position.setLongitude(Double.parseDouble(readArgument(buf)));
        position.setLatitude(Double.parseDouble(readArgument(buf)));
        position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(readArgument(buf))));
        position.setCourse(Double.parseDouble(readArgument(buf)));

        position.set(Position.KEY_SATELLITES, Integer.parseInt(readArgument(buf)));

        return position;

    }

    return null;
}

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

License:Apache License

private void decodeExtraData(Position position, ByteBuf buf, int end) {
    while (buf.readerIndex() < end) {

        int type = buf.readUnsignedByte();
        int length = buf.readUnsignedByte();
        if (length == 255) {
            length += buf.readUnsignedByte();
        }/*ww w.  ja  va  2 s .co  m*/

        int n;

        switch (type) {
        case 2:
            position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedMedium());
            break;
        case 5:
            position.set(Position.KEY_INPUT, buf.readUnsignedByte());
            break;
        case 6:
            n = buf.readUnsignedByte() >> 4;
            if (n < 2) {
                position.set(Position.PREFIX_ADC + n, buf.readFloat());
            } else {
                position.set("di" + (n - 2), buf.readFloat());
            }
            break;
        case 7:
            int alarm = buf.readUnsignedByte();
            buf.readUnsignedByte();
            if (BitUtil.check(alarm, 5)) {
                position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
            }
            break;
        case 8:
            position.set("antihijack", buf.readUnsignedByte());
            break;
        case 9:
            position.set("unauthorized", ByteBufUtil.hexDump(buf.readSlice(8)));
            break;
        case 10:
            position.set("authorized", ByteBufUtil.hexDump(buf.readSlice(8)));
            break;
        case 24:
            for (int i = 0; i < length / 2; i++) {
                position.set(Position.PREFIX_TEMP + buf.readUnsignedByte(), buf.readByte());
            }
            break;
        case 28:
            position.set(Position.KEY_AXLE_WEIGHT, buf.readUnsignedShort());
            buf.readUnsignedByte();
            break;
        case 90:
            position.set(Position.KEY_POWER, buf.readFloat());
            break;
        case 101:
            position.set(Position.KEY_OBD_SPEED, buf.readUnsignedByte());
            break;
        case 102:
            position.set(Position.KEY_RPM, buf.readUnsignedByte() * 50);
            break;
        case 107:
            int fuel = buf.readUnsignedShort();
            int fuelFormat = fuel >> 14;
            if (fuelFormat == 1) {
                position.set("fuelValue", (fuel & 0x3fff) * 0.4 + "%");
            } else if (fuelFormat == 2) {
                position.set("fuelValue", (fuel & 0x3fff) * 0.5 + " l");
            } else if (fuelFormat == 3) {
                position.set("fuelValue", (fuel & 0x3fff) * -0.5 + " l");
            }
            break;
        case 108:
            position.set(Position.KEY_OBD_ODOMETER, buf.readUnsignedInt() * 5);
            break;
        case 150:
            position.set(Position.KEY_DOOR, buf.readUnsignedByte());
            break;
        default:
            buf.skipBytes(length);
            break;
        }
    }
}

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

License:Apache License

private void decodeCards(Position position, ByteBuf buf) {

    int index = 1;
    for (int i = 0; i < 4; i++) {

        int blockLength = buf.readUnsignedShort();
        int blockEnd = buf.readerIndex() + blockLength;

        if (blockLength > 0) {

            int count = buf.readUnsignedByte();
            for (int j = 0; j < count; j++) {

                int length = buf.readUnsignedByte();

                boolean odd = length % 2 != 0;
                if (odd) {
                    length += 1;/*from w  w  w .j a  v a  2  s.  co  m*/
                }

                String num = ByteBufUtil.hexDump(buf.readSlice(length / 2));

                if (odd) {
                    num = num.substring(1);
                }

                position.set("card" + index, num);
            }
        }

        buf.readerIndex(blockEnd);
    }

}

From source file:org.traccar.protocol.TzoneProtocolDecoder.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.readUnsignedShort(); // length
    if (buf.readUnsignedShort() != 0x2424) {
        return null;
    }/*from ww  w  .  j  a v a 2 s. c o  m*/
    int hardware = buf.readUnsignedShort();
    long firmware = buf.readUnsignedInt();

    String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
    if (deviceSession == null) {
        return null;
    }

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

    position.set(Position.KEY_VERSION_HW, hardware);
    position.set(Position.KEY_VERSION_FW, firmware);

    position.setDeviceTime(
            new DateBuilder().setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
                    .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte()).getDate());

    // GPS info

    if (hardware == 0x406 || !decodeGps(position, buf, hardware)) {

        getLastLocation(position, position.getDeviceTime());

    }

    // LBS info

    int blockLength = buf.readUnsignedShort();
    int blockEnd = buf.readerIndex() + blockLength;

    if (blockLength > 0 && (hardware == 0x10A || hardware == 0x10B || hardware == 0x406)) {
        position.setNetwork(
                new Network(CellTower.fromLacCid(buf.readUnsignedShort(), buf.readUnsignedShort())));
    }

    buf.readerIndex(blockEnd);

    // Status info

    blockLength = buf.readUnsignedShort();
    blockEnd = buf.readerIndex() + blockLength;

    if (blockLength >= 13) {
        position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
        position.set("terminalInfo", buf.readUnsignedByte());

        int status = buf.readUnsignedByte();
        position.set(Position.PREFIX_OUT + 1, BitUtil.check(status, 0));
        position.set(Position.PREFIX_OUT + 2, BitUtil.check(status, 1));
        status = buf.readUnsignedByte();
        position.set(Position.PREFIX_IN + 1, BitUtil.check(status, 4));
        if (BitUtil.check(status, 0)) {
            position.set(Position.KEY_ALARM, Position.ALARM_SOS);
        }

        position.set(Position.KEY_RSSI, buf.readUnsignedByte());
        position.set("gsmStatus", buf.readUnsignedByte());
        position.set(Position.KEY_BATTERY, buf.readUnsignedShort());
        position.set(Position.KEY_POWER, buf.readUnsignedShort());
        position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
        position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
    }

    if (blockLength >= 15) {
        position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedShort());
    }

    buf.readerIndex(blockEnd);

    if (hardware == 0x10B) {

        decodeCards(position, buf);

        buf.skipBytes(buf.readUnsignedShort()); // temperature
        buf.skipBytes(buf.readUnsignedShort()); // lock

        decodePassengers(position, buf);

    }

    if (hardware == 0x406) {

        decodeTags(position, buf);

    }

    return position;
}

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

License:Apache License

private void decodeObd(Position position, ByteBuf buf, int length) {

    int end = buf.readerIndex() + length;

    while (buf.readerIndex() < end) {
        int parameterLength = buf.getUnsignedByte(buf.readerIndex()) >> 4;
        int mode = buf.readUnsignedByte() & 0x0F;
        position.add(ObdDecoder.decode(mode, ByteBufUtil.hexDump(buf.readSlice(parameterLength - 1))));
    }//from  ww w .  ja  v a 2 s.  co m
}

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

License:Apache License

private void decodeJ1708(Position position, ByteBuf buf, int length) {

    int end = buf.readerIndex() + length;

    while (buf.readerIndex() < end) {
        int mark = buf.readUnsignedByte();
        int len = BitUtil.between(mark, 0, 6);
        int type = BitUtil.between(mark, 6, 8);
        int id = buf.readUnsignedByte();
        if (type == 3) {
            id += 256;//from  w  w  w  . j  a v  a  2  s.  c o  m
        }
        String value = ByteBufUtil.hexDump(buf.readSlice(len - 1));
        if (type == 2 || type == 3) {
            position.set("pid" + id, value);
        }
    }
}

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

License:Apache License

private Object decodeBinary(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {

    buf.readUnsignedByte(); // header
    buf.readUnsignedByte(); // version
    buf.readUnsignedByte(); // type

    String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
    if (deviceSession == null) {
        return null;
    }/*ww w .ja  v  a  2 s.co  m*/

    if (deviceSession.getTimeZone() == null) {
        deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
    }

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

    long seconds = buf.readUnsignedInt() & 0x7fffffffL;
    seconds += 946684800L; // 2000-01-01 00:00
    seconds -= deviceSession.getTimeZone().getRawOffset() / 1000;
    Date time = new Date(seconds * 1000);

    boolean hasLocation = false;

    while (buf.readableBytes() > 3) {

        int type = buf.readUnsignedByte();
        int length = type == DATA_CANBUS ? buf.readUnsignedShort() : buf.readUnsignedByte();

        switch (type) {

        case DATA_GPS:
            hasLocation = true;
            position.setValid(true);
            position.setLatitude(buf.readInt() / 1000000.0);
            position.setLongitude(buf.readInt() / 1000000.0);
            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
            position.setCourse(buf.readUnsignedShort());
            position.set(Position.KEY_HDOP, buf.readUnsignedShort());
            break;

        case DATA_LBS:
            if (length == 11) {
                position.setNetwork(new Network(CellTower.from(buf.readUnsignedShort(), buf.readUnsignedShort(),
                        buf.readUnsignedShort(), buf.readUnsignedInt(), -buf.readUnsignedByte())));
            } else {
                position.setNetwork(new Network(CellTower.from(buf.readUnsignedShort(), buf.readUnsignedShort(),
                        buf.readUnsignedShort(), buf.readUnsignedShort(), -buf.readUnsignedByte())));
            }
            if (length > 9 && length != 11) {
                buf.skipBytes(length - 9);
            }
            break;

        case DATA_STATUS:
            int status = buf.readUnsignedShort();
            position.set(Position.KEY_IGNITION, BitUtil.check(status, 9));
            position.set(Position.KEY_STATUS, status);
            position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedShort()));
            break;

        case DATA_ODOMETER:
            position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
            break;

        case DATA_ADC:
            decodeAdc(position, buf, length);
            break;

        case DATA_GEOFENCE:
            position.set("geofenceIn", buf.readUnsignedInt());
            position.set("geofenceAlarm", buf.readUnsignedInt());
            break;

        case DATA_OBD2:
            decodeObd(position, buf, length);
            break;

        case DATA_FUEL:
            position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedInt() / 10000.0);
            break;

        case DATA_OBD2_ALARM:
            decodeObd(position, buf, length);
            break;

        case DATA_HARSH_DRIVER:
            decodeDriverBehavior(position, buf);
            break;

        case DATA_CANBUS:
            position.set("can", ByteBufUtil.hexDump(buf.readSlice(length)));
            break;

        case DATA_J1708:
            decodeJ1708(position, buf, length);
            break;

        case DATA_VIN:
            position.set(Position.KEY_VIN, buf.readSlice(length).toString(StandardCharsets.US_ASCII));
            break;

        case DATA_RFID:
            position.set(Position.KEY_DRIVER_UNIQUE_ID,
                    buf.readSlice(length - 1).toString(StandardCharsets.US_ASCII));
            position.set("authorized", buf.readUnsignedByte() != 0);
            break;

        case DATA_EVENT:
            position.set(Position.KEY_EVENT, buf.readUnsignedByte());
            if (length > 1) {
                position.set("eventMask", buf.readUnsignedInt());
            }
            break;

        default:
            buf.skipBytes(length);
            break;
        }
    }

    if (!hasLocation) {
        getLastLocation(position, time);
    } else {
        position.setTime(time);
    }

    return position;
}

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

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    if (buf.getByte(buf.readerIndex()) != '*') {
        return null;
    }/*from   w  w  w .  j av a2s .c om*/

    int headerIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '&');
    if (headerIndex < 0) {
        headerIndex = buf.writerIndex();
    }
    String header = buf.readSlice(headerIndex - buf.readerIndex()).toString(StandardCharsets.US_ASCII);

    Parser parser = new Parser(PATTERN_HEADER, header);
    if (!parser.matches()) {
        return null;
    }

    String head = parser.next();
    boolean reply = parser.next().equals("1");

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

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

    String type = parser.next();
    String subtype = parser.next();

    if (reply && channel != null) {
        channel.writeAndFlush(new NetworkMessage("*" + head + "Y" + type + subtype + "#", remoteAddress));
    }

    while (buf.isReadable()) {

        buf.readByte(); // skip delimiter

        byte dataType = buf.readByte();

        int delimiterIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '&');
        if (delimiterIndex < 0) {
            delimiterIndex = buf.writerIndex();
        }

        ByteBuf data = buf.readSlice(delimiterIndex - buf.readerIndex());

        switch (dataType) {
        case 'A':
            decodeLocation(position, data.toString(StandardCharsets.US_ASCII));
            break;
        case 'B':
            position.set(Position.KEY_STATUS, data.toString(StandardCharsets.US_ASCII));
            break;
        case 'C':
            long odometer = 0;
            while (data.isReadable()) {
                odometer <<= 4;
                odometer += data.readByte() - (byte) '0';
            }
            position.set(Position.KEY_ODOMETER, odometer * 2 * 1852 / 3600);
            break;
        case 'F':
            position.setSpeed(Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII)) * 0.1);
            break;
        case 'K':
            position.set("statusExtended", data.toString(StandardCharsets.US_ASCII));
            break;
        case 'P':
            if (data.readableBytes() >= 16) {
                position.setNetwork(new Network(
                        CellTower.from(Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII)),
                                Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII)),
                                Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII), 16),
                                Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII), 16))));
            }
            break;
        case 'Q':
            position.set("obdPid", ByteBufUtil.hexDump(data));
            break;
        case 'R':
            if (head.startsWith("HQ")) {
                position.set(Position.KEY_RSSI,
                        Integer.parseInt(data.readSlice(2).toString(StandardCharsets.US_ASCII)));
                position.set(Position.KEY_SATELLITES,
                        Integer.parseInt(data.readSlice(2).toString(StandardCharsets.US_ASCII)));
            } else {
                position.set("odbTravel", ByteBufUtil.hexDump(data));
            }
            break;
        case 'S':
            position.set("obdTraffic", ByteBufUtil.hexDump(data));
            break;
        case 'T':
            position.set(Position.KEY_BATTERY_LEVEL,
                    Integer.parseInt(data.readSlice(2).toString(StandardCharsets.US_ASCII)));
            break;
        case 'V':
            position.set(Position.KEY_POWER,
                    Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII)) * 0.1);
            break;
        default:
            break;
        }

    }

    if (position.getLatitude() != 0 && position.getLongitude() != 0) {
        return position;
    }

    return null;
}