[lwip-users] Dropping existing TCP connections to service new ones

[Art R.]

The tcp.c module has function tcp_kill_prio which is used to kill existing
TCP connections when a new connection is being attempted and there is an
'out of PCBs' situation. The comment in that function says "kill the oldest
active connection that has lower priority than prio", but the test it
performs is "...pcb->prio <= prio". This appears to allow a new connection
to kill an existing one of the same priority.

The default case is that all pcbs will have the same priority ("normal"), so
the oldest is killed. 

Is this a bug? Should the code read "if (pcb->prio < prio && ..."  (less
than instead of less or equal)?
Or is it intentional? 

What would be the best way to disable the killing of active connections?
(Preferably without modifying the lwIP source code.)

Thanks,
Art R.



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