byte opcode[] = { datagram[header_size-2], datagram[header_size-1] }; ByteBuffer bb = ByteBuffer.wrap(opcode).order(ByteOrder.LITTLE_ENDIAN); return Opcode.isNego(bb.getShort());
return Opcode.isNego(getOpcode(datagram));
    public static boolean isNegoDatagram(byte [] datagram)    {	byte opcode[] = { datagram[header_size-2], datagram[header_size-1] };	ByteBuffer bb = ByteBuffer.wrap(opcode).order(ByteOrder.LITTLE_ENDIAN);	return Opcode.isNego(bb.getShort());    }