[lwip-devel] [bug #33962] TF_FIN not always set after FIN is sent

[Stephane Lesage]

Follow-up Comment #3, bug #33962 (project lwip):

>In tcp_send_fin(),
>pcb->unsent is checked and the last segment in this queue gets the FIN flag
>so this should work

Hi Simon,
the TCP_FIN flag is indeed set in the *SEGMENT* and will be set in the last
output packet. The problem is not here.
The issue is that the TF_FIN flag is not set in the *PCB*,
so that Nagle algorithm is not disabled and tcp_output cannot send the
remaining data immediately.

The solution is to add: pcb->flags |= TF_FIN
Maybe it's too trivial, but it works for Cameron and me.




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