Example usage for io.netty.buffer ByteBuf writeShortLE

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

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Introduction

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

Prototype

public abstract ByteBuf writeShortLE(int value);

Source Link

Document

Sets the specified 16-bit short integer in the Little Endian Byte Order at the current writerIndex and increases the writerIndex by 2 in this buffer.

Usage

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

License:Apache License

private static void sendResponse(Channel channel, int device, long id, int crc) {
    if (channel != null) {
        ByteBuf response = Unpooled.buffer();
        response.writeByte(device);// www  .  j  a va 2  s .c  o m
        response.writeByte(MSG_ACK);
        response.writeIntLE((int) id);
        response.writeShortLE(crc);
        response.writeShortLE(Checksum.crc16(Checksum.CRC16_XMODEM, response.nioBuffer()));

        ByteBuf encoded = Unpooled.buffer();
        encoded.writeByte(0x01); // header
        while (response.isReadable()) {
            int b = response.readByte();
            if (b == 0x01 || b == 0x04 || b == 0x10 || b == 0x11 || b == 0x13) {
                encoded.writeByte(0x10);
                b += 0x20;
            }
            encoded.writeByte(b);
        }
        response.release();
        encoded.writeByte(0x04); // ending
        channel.writeAndFlush(new NetworkMessage(encoded, channel.remoteAddress()));
    }
}

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

License:Apache License

private void sendAcknowledgment(Channel channel, int sequenceNumber) {
    ByteBuf data = Unpooled.buffer(4);
    data.writeShortLE(sequenceNumber);
    data.writeShortLE(0); // OK

    ByteBuf header = Unpooled.buffer(20);
    header.writeByte(1);//from  ww  w.  ja  v a2 s . com
    header.writeByte(0);
    header.writeShortLE(senderSequenceNumber++);
    header.writeShortLE(MSG_ACKNOWLEDGEMENT);
    header.writeShortLE(header.capacity() + data.capacity());
    header.writeShortLE(0);
    header.writeShortLE(Checksum.crc16(Checksum.CRC16_CCITT_FALSE, data.nioBuffer()));
    header.writeIntLE(0);
    header.writeIntLE((int) (System.currentTimeMillis() / 1000) + LEAP_SECONDS_DELTA);

    if (channel != null) {
        channel.writeAndFlush(
                new NetworkMessage(Unpooled.wrappedBuffer(header, data), channel.remoteAddress()));
    }
}

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

License:Apache License

private void sendNtcbReply(Channel channel, ByteBuf data) {
    if (channel != null) {
        ByteBuf header = Unpooled.buffer(16);
        header.writeCharSequence(prefix, StandardCharsets.US_ASCII);
        header.writeIntLE((int) deviceUniqueId);
        header.writeIntLE((int) serverId);
        header.writeShortLE(data.readableBytes());
        header.writeByte(Checksum.xor(data.nioBuffer()));
        header.writeByte(Checksum.xor(header.nioBuffer()));

        channel.writeAndFlush(/*www .  j a va 2 s. c om*/
                new NetworkMessage(Unpooled.wrappedBuffer(header, data), channel.remoteAddress()));
    }
}

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

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;/*from  w  ww.ja  v a 2s.c o m*/

    buf.readUnsignedShortLE(); // length
    int type = buf.readUnsignedShortLE();

    if (type == MSG_SHAKE_HAND && channel != null) {

        ByteBuf response = Unpooled.buffer(13);
        response.writeCharSequence("\r\n*KW", StandardCharsets.US_ASCII);
        response.writeByte(0);
        response.writeShortLE(response.capacity());
        response.writeShortLE(MSG_SHAKE_HAND_RESPONSE);
        response.writeByte(1); // status
        response.writeCharSequence("\r\n", StandardCharsets.US_ASCII);

        channel.writeAndFlush(new NetworkMessage(response, remoteAddress));

    } else if (type == MSG_UPLOAD_POSITION || type == MSG_UPLOAD_POSITION_NEW || type == MSG_CONTROL_RESPONSE
            || type == MSG_ALARM) {

        boolean newFormat = false;
        if (type == MSG_UPLOAD_POSITION && buf.readableBytes() == 48
                || type == MSG_ALARM && buf.readableBytes() == 48
                || type == MSG_CONTROL_RESPONSE && buf.readableBytes() == 57) {
            newFormat = true;
        }

        Position position = new Position(getProtocolName());

        if (type == MSG_CONTROL_RESPONSE) {
            buf.readUnsignedIntLE(); // GIS ip
            buf.readUnsignedIntLE(); // GIS port
        }

        position.setValid(BitUtil.check(buf.readUnsignedByte(), 0));

        short alarm = buf.readUnsignedByte();
        switch (alarm) {
        case 1:
            position.set(Position.KEY_ALARM, Position.ALARM_SOS);
            break;
        case 2:
            position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
            break;
        case 3:
            position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_EXIT);
            break;
        case 9:
            position.set(Position.KEY_ALARM, Position.ALARM_POWER_OFF);
            break;
        default:
            break;
        }

        if (newFormat) {
            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedIntLE()));
            position.setCourse(buf.readFloatLE());
        } else {
            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
            position.setCourse(buf.readUnsignedShortLE());
        }
        position.setLongitude(buf.readFloatLE());
        position.setLatitude(buf.readFloatLE());

        if (!newFormat) {
            long timeValue = buf.readUnsignedIntLE();
            DateBuilder dateBuilder = new DateBuilder().setYear((int) BitUtil.from(timeValue, 26))
                    .setMonth((int) BitUtil.between(timeValue, 22, 26))
                    .setDay((int) BitUtil.between(timeValue, 17, 22))
                    .setHour((int) BitUtil.between(timeValue, 12, 17))
                    .setMinute((int) BitUtil.between(timeValue, 6, 12))
                    .setSecond((int) BitUtil.to(timeValue, 6));
            position.setTime(dateBuilder.getDate());
        }

        ByteBuf rawId;
        if (newFormat) {
            rawId = buf.readSlice(12);
        } else {
            rawId = buf.readSlice(11);
        }
        String id = rawId.toString(StandardCharsets.US_ASCII).replaceAll("[^\\p{Print}]", "");
        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
        if (deviceSession == null) {
            return null;
        }
        position.setDeviceId(deviceSession.getDeviceId());

        if (newFormat) {
            DateFormat dateFormat = new SimpleDateFormat("yy-MM-dd HH:mm:ss");
            position.setTime(dateFormat.parse(buf.readSlice(17).toString(StandardCharsets.US_ASCII)));
            buf.readByte();
        }

        if (!newFormat) {
            position.set(Position.PREFIX_IO + 1, buf.readUnsignedByte());
            position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte());
        } else if (type == MSG_UPLOAD_POSITION_NEW) {
            position.set(Position.PREFIX_TEMP + 1, buf.readShortLE());
            position.set(Position.KEY_ODOMETER, buf.readFloatLE());
        }

        return position;
    }

    return null;
}

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

License:Apache License

private ByteBuf encodeContent(String content) {

    ByteBuf buf = Unpooled.buffer(12 + 56);

    buf.writeCharSequence("\r\n*KW", StandardCharsets.US_ASCII);
    buf.writeByte(0);/*from  w  w  w  .j  av a 2 s.c  o m*/
    buf.writeShortLE(buf.capacity());
    buf.writeShortLE(NoranProtocolDecoder.MSG_CONTROL);
    buf.writeInt(0); // gis ip
    buf.writeShortLE(0); // gis port
    buf.writeBytes(content.getBytes(StandardCharsets.US_ASCII));
    buf.writerIndex(buf.writerIndex() + 50 - content.length());
    buf.writeCharSequence("\r\n", StandardCharsets.US_ASCII);

    return buf;
}

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

License:Apache License

private void requestArchive(Channel channel) {
    if (lastIndex == 0) {
        lastIndex = newIndex;/*from   ww  w  .j  av a2 s.co  m*/
    } else if (newIndex > lastIndex) {
        ByteBuf request = Unpooled.buffer(12);
        request.writeShortLE(MSG_LOG_SYNC);
        request.writeShortLE(4);
        request.writeIntLE((int) lastIndex);
        request.writeIntLE(0);
        channel.writeAndFlush(new NetworkMessage(request, channel.remoteAddress()));
    }
}

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

License:Apache License

private void sendResponse(Channel channel, int type) {
    if (channel != null) {
        ByteBuf response = Unpooled.buffer();
        response.writeByte(0xaa); // header
        response.writeShortLE(0x85da); // reserved
        response.writeShortLE(15); // length
        response.writeByte(1); // edition
        response.writeShortLE(MSG_RESPONSE);
        response.writeShortLE(type);/*  w w w  .  ja v  a2  s. co  m*/
        response.writeIntLE(0); // command id
        response.writeByte(0); // status
        response.writeByte(0); // result length
        response.writeIntLE(0x20000); // result data ?
        channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
    }
}

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

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;//from  www.j av a  2 s  .  c o m

    buf.readUnsignedShortLE(); // checksum
    buf.readUnsignedShortLE(); // preamble
    long id = buf.readUnsignedIntLE();
    buf.readUnsignedShortLE(); // length

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(id));
    if (deviceSession == null) {
        return null;
    }

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

    while (buf.isReadable()) {

        buf.readUnsignedShortLE(); // checksum
        buf.readUnsignedShortLE(); // checksum
        buf.readUnsignedShortLE(); // type
        int length = buf.readUnsignedShortLE();

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

        position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
        position.setLatitude(buf.readUnsignedIntLE() * 0.000001);
        position.setLongitude(buf.readUnsignedIntLE() * 0.000001);
        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE() * 0.01));
        position.setAltitude(buf.readShortLE());
        position.setCourse(buf.readUnsignedShortLE());
        position.setValid(buf.readUnsignedByte() > 0);

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

        if (BitUtil.check(buf.readUnsignedByte(), 0)) {
            position.set(Position.KEY_ARCHIVE, true);
        }

        positions.add(position);

        buf.skipBytes(length);

    }

    if (channel != null) {
        ByteBuf response = Unpooled.buffer();
        response.writeShortLE(0);
        response.writeShortLE(0x4CBF); // preamble
        response.writeIntLE((int) id);
        response.writeShortLE(0);
        response.setShortLE(0, Checksum.crc16(Checksum.CRC16_CCITT_FALSE,
                response.nioBuffer(2, response.readableBytes() - 2)));
        channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
    }

    return positions;
}