private void rx(DatagramSocket socket, byte[] data) throws Exception 
	{
		try
		{
			DatagramPacket packet=new DatagramPacket(data, data.length);
			socket.receive(packet);
			messagePacket = Packet.parseUDPdata(data);
			if (clientAddress == null)
			{
				clientAddress = packet.getAddress();
				clientPort = packet.getPort();
			}
		}
		catch (IOException e)
		{
			System.err.println("Erreur : " + e);
		}
	}