Example usage for io.netty.buffer ByteBuf writeLongLE

Introduction

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

Prototype

public abstract ByteBuf writeLongLE(long value);

Source Link

Document

Sets the specified 64-bit long integer at the current writerIndex in the Little Endian Byte Order and increases the writerIndex by 8 in this buffer.

Usage

From source file:io.gomint.proxprox.network.EncryptionHandler.java

License:BSD License

private byte[] calcHash(byte[] input, byte[] key, AtomicLong counter) {
    Hash digest = getSHA256();/*from  w  ww  . ja  v a2  s .c om*/
    if (digest == null) {
        return new byte[8];
    }

    ByteBuf buf = PooledByteBufAllocator.DEFAULT.directBuffer(8 + input.length + key.length);
    buf.writeLongLE(counter.getAndIncrement());
    buf.writeBytes(input);
    buf.writeBytes(key);
    digest.update(buf);
    buf.release();
    return digest.digest();
}

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

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;/*w  w w  .j a  va  2  s  .  c  o  m*/

    String imei = String.format("%015d", buf.readLongLE());
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
    if (deviceSession == null) {
        return null;
    }

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

    while (buf.readableBytes() > 1) {

        int dataEnd = buf.readUnsignedShortLE() + buf.readerIndex();
        int type = buf.readUnsignedByte();

        if (type != MSG_ASYNC_STACK && type != MSG_TIME_TRIGGERED) {
            return null;
        }

        int confirmKey = buf.readUnsignedByte() & 0x7F;

        while (buf.readerIndex() < dataEnd) {

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

            int structEnd = buf.readUnsignedByte() + buf.readerIndex();

            long time = buf.readUnsignedIntLE();
            if ((time & 0x0f) == DATA_TYPE) {

                time = time >> 4 << 1;
                time += 0x47798280; // 01/01/2008
                position.setTime(new Date(time * 1000));

                // Read masks
                int mask;
                List<Integer> masks = new LinkedList<>();
                do {
                    mask = buf.readUnsignedShortLE();
                    masks.add(mask);
                } while (BitUtil.check(mask, 15));

                mask = masks.get(0);

                if (BitUtil.check(mask, 0)) {
                    position.setValid(true);
                    position.setLongitude(buf.readFloatLE());
                    position.setLatitude(buf.readFloatLE());
                    position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));

                    int status = buf.readUnsignedByte();
                    position.set(Position.KEY_SATELLITES, BitUtil.to(status, 4));
                    position.set(Position.KEY_HDOP, BitUtil.from(status, 4));

                    position.setCourse(buf.readUnsignedByte() * 2);
                    position.setAltitude(buf.readUnsignedShortLE());

                    position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
                }

                if (BitUtil.check(mask, 1)) {
                    position.set(Position.KEY_INPUT, buf.readUnsignedShortLE());
                }

                for (int i = 1; i <= 8; i++) {
                    if (BitUtil.check(mask, i + 1)) {
                        position.set(Position.PREFIX_ADC + i, buf.readUnsignedShortLE());
                    }
                }

                if (BitUtil.check(mask, 10)) {
                    buf.skipBytes(4);
                }
                if (BitUtil.check(mask, 11)) {
                    buf.skipBytes(4);
                }
                if (BitUtil.check(mask, 12)) {
                    buf.skipBytes(2);
                }
                if (BitUtil.check(mask, 13)) {
                    buf.skipBytes(2);
                }

                if (BitUtil.check(mask, 14)) {
                    position.setNetwork(new Network(CellTower.from(buf.readUnsignedShortLE(),
                            buf.readUnsignedByte(), buf.readUnsignedShortLE(), buf.readUnsignedShortLE(),
                            buf.readUnsignedByte())));
                    buf.readUnsignedByte();
                }

                if (BitUtil.check(mask, 0)) {
                    positions.add(position);
                }
            }

            buf.readerIndex(structEnd);
        }

        // Send response
        if (type == MSG_ASYNC_STACK && channel != null) {
            ByteBuf response = Unpooled.buffer(8 + 2 + 2 + 1);
            response.writeLongLE(Long.parseLong(imei));
            response.writeShortLE(2);
            response.writeByte(MSG_STACK_COFIRM);
            response.writeByte(confirmKey);

            int checksum = 0;
            for (int i = 0; i < response.writerIndex(); i++) {
                checksum += response.getUnsignedByte(i);
            }
            response.writeByte(checksum);

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

    return positions;
}

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

License:Apache License

@Override
protected Object encodeCommand(Command command) {

    if (command.getType().equals(Command.TYPE_OUTPUT_CONTROL)) {
        ByteBuf buf = Unpooled.buffer();

        buf.writeLongLE(Long.parseLong(getUniqueId(command.getDeviceId())));
        buf.writeShortLE(1 + 1 + 3 + 1); // length
        buf.writeByte(BceProtocolDecoder.MSG_OUTPUT_CONTROL);
        buf.writeByte(command.getInteger(Command.KEY_INDEX) == 1 ? 0x0A : 0x0B);
        buf.writeByte(0xFF); // index
        buf.writeByte(0x00); // form id
        buf.writeShortLE(Integer.parseInt(command.getString(Command.KEY_DATA)) > 0 ? 0x0055 : 0x0000);
        buf.writeByte(Checksum.sum(buf.nioBuffer()));

        return buf;
    } else {//from  ww  w .j a v  a2s .com
        return null;
    }
}

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