[Bug 251540] [tcp] regression: no FIN on TCP connections when shutting down

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251540

--- Comment #1 from Michael Tuexen <tuexen at freebsd.org> ---
I just tested running a server

nc -l 8080

on FreeBSD head (r367530) against a client running nc 192.168.1.60 8080 and
then shutting down the host on which the server is running.

I'm also running tcpdump on the machine one which the client runs. I do see a
FIN segment sent by the server stack. When running the client using truss nc
192.168.1.60 8080 I can also see that the incoming FIN is processed, because
the reading end on the socket is shutdown.

Can you provide a reproducible setup where no FIN is sent?

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