[lwip-devel] [bug #51789] TCP_EVENT_CLOSE, tcp_close() and possible use of pcb with tcp_output()

[Art Heers]

Follow-up Comment #6, bug #51789 (project lwip):

>  TF_GOT_FIN is set in tcp_receive(), which is not called from tcp_process()
if the pcb is in SYN_SENT state. 

OK, I see, thank you.

Yes, I did catch this with my emulator when my call back code called
tcp_close() when the pbuf parameter was NULL.  But admittedly this was a few
months ago and further it was with LwIP version 1.4.  And since I changed my
call back code to not call tcp_close() I have not seen it since.

Maybe I can change the discussion here by asking why call tcp_close() inside
the call back function?  It looks like the LwIP stack takes care of the
closing process without the call back function calling tcp_close().     

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