.. index:: pair: group; Sending and receiving data
.. _doxid-group__basic-send__receive:

Sending and receiving data
==========================

.. toctree::
	:hidden:

Check that packets can be sent and received over the tested interface.

Scenarios: X3-SYS01, X3-SYS02.



#. Establish connection between a pair of sockets of type **sock_type** on IUT and Tester.

#. If **tx** is ``TRUE``, sender is IUT and receiver is Tester, otherwise - the other way around.

#. If ``TCP`` is checked, enable ``TCP_NODELAY`` on sender socket to ensure that a packet is sent as soon as possible, even when it is small.

#. In a loop, send **pkts_num** packets with sizes chosen according to **pkt_size**. Receive and check them on peer.

#. Check that interface statistics were updated expectedly, there were no errors or discarded packets.

Dmitry Izbitsky `Dmitry.Izbitsky@oktetlabs.ru <mailto:Dmitry.Izbitsky@oktetlabs.ru>`__



.. rubric:: Parameters:

.. list-table::
	:widths: 20 80

	*
		- env

		- 
		  Testing environment:
		  
		  * :ref:`env.peer2peer <doxid-group__env-peer2peer>`
		  
		  * :ref:`env.peer2peer_ipv6 <doxid-group__env-peer2peer__ipv6>`

	*
		- sock_type

		- 
		  Socket type:
		  
		  * ``SOCK_STREAM``
		  
		  * ``SOCK_DGRAM``

	*
		- tx

		- If ``TRUE``, check sending from IUT, otherwise check receiving on IUT.

	*
		- pkt_size

		- 
		  Packet size:
		  
		  * ``1000``
		  
		  * ``-1`` (random)

	*
		- pkts_num

		- 
		  Number of packets to send or receive:
		  
		  * ``100``