Test description

The entire GNRC TCP test consists of several test cases. Each test is ran via its own python script in the tests directory.

01-conn_lifecycle_as_client.py This test covers TCP connection establishment and teardown with GNRC_TCP acting as tcp client.
02-conn_lifecycle_as_server.py This test covers TCP connection establishment and teardown with GNRC_TCP acting as tcp server.
03-send_data.py This test covers sending of a byte stream from GNRC_TCP to the host system. The amount of data to send is large enough to force GNRC_TCP to split the given stream into multiple packets.
04-receive_data.py This test covers receiving of a byte stream from the host system. The received data is causing window opening and closing as well as data transmission over multiple packets.
05-garbage-pkts.py This test mostly is a regression test for issues that were found through fuzzing. It uses scapy to interact with the node.
06-receive_data_closed_conn.py This test covers accessing received data after receiving a FIN packet. If the connection was closed by the peer, a call to gnrc_tcp_recv must return directly with all currently received data or zero if there is no data. The function must return immediately despite any given timeout.
07-endpoint_construction.py This test ensures the correctness of the endpoint construction.

Setup

The test requires a tap-device setup. This can be achieved by running 'dist/tools/tapsetup/tapsetup' or by executing the following commands:

sudo ip tuntap add tap0 mode tap user ${USER}
sudo ip link set tap0 up

make BOARD=<BOARD_NAME> all flash
sudo make BOARD=<BOARD_NAME> test-as-root

'sudo' is required due to ethos and raw socket usage.