Adrian Figueroa wrote:
I have implemented a simple TCP server on lwIP 1.4.1 running on
chibiOS (a realtime OS) with the netconn api on an STM32F746.
It goes like this:
[..]
My TCP client (it is a Matlab PC) connects, sends some data, and
disconnects. The TCP server also closes the connection on its side and
then deletes the netconn structure.
The problem is that I get spurious ACK and FIN, ACK in Wireshark.
From lwIP's point of view, there's nothing spurious: the FIN sent by
lwIP is not ACKed by the remote host until after the retransmission. I
can't tell you why, but it seems like a remote side issue.
[..]Find a capture attached.
When sending a pcap, the minimum you could do is make reading the
capture easier for anyone wanting to help: From your capture I can only
guess which side is lwIP.
Simon
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