[lwip-devel] [bug #45433] Endless loop in tcp_slowtmr

[Michael Tempest]

Follow-up Comment #4, bug #45433 (project lwip):

I have encountered the same problem. I traced it to calling tcp_close whilst
the pcb is in the TIME_WAIT state. tcp_close_shutdown then moves the pcb to
the tcp_tw_pcbs list. Since it is already there, this creates a loop in the
tcp_tw_pcbs list. 

We can argue whether it is legal for the application should be calling
tcp_close when in this state, but i believe that tcp_close should protect
itself against this - it is easy to catch with a check and hard to debug...

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