private void rx(DatagramSocket socket, byte[] data) throws Exception 
	{
		try
		{
			DatagramPacket packet=new DatagramPacket(data, data.length);
			//System.out.println("Attente du paquet");
			socket.receive(packet);
			//System.out.println("Parsage du paquet");
			dataPacket = Packet.parseUDPdata(data);
			//System.out.println("Sequence du paquet : " + dataPacket.getSequence());
		}
		catch (SocketTimeoutException e)
		{
			System.out.println("Timeout !!!!");
			NACK();
		}
		catch (Exception e)
		{
			System.err.println("Erreur : " + e);
		}
	}