[riot-notifications] [RIOT-OS/RIOT] gnrc_sock_tcp: add gnrc sock tcp (#16494)

Simon Brummer notifications at github.com
Sun Aug 15 13:27:43 CEST 2021

Retransmissions of FIN Packets in cases where the ACK sent in response was lost on the way. A TCP connection is practically dead if after two times the maximum segment lifetime no packet was transmitted. Linux handles this this internally and return fast after close and allocates a new TCB for the next connection. RIOT can't do this since everything is statically allocated. Thats why close/disconnect has to wait until the used TCB is reusable again. If you want more details look for TIME-WAIT in the TCP RFC.

TCP connection teardown is pretty complicated

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