[lwip-users] Re: [lwip] TCP pcb's in ESTABLISHED hang around forever after close

[Paul Sheer]

>  
> > currently I am thinking of adding a new structure
> > member pcb->die_timeout. This gives the calling app
> > tighter control. You can set die_timeout at any time
> > you think the tcp connection should *really* not hang
> > around for longer than a given number of seconds.
> 
> It is also possible to use the polling functionality. TCP will poll the
> application with a specific interval when the connection is idle.
> 

in any event I have added this new member, and i'm happy with
the behavior. I think its the clean way to do things.

generally, if you're are paranoid about hanging pcbs (and I am),
then you want to drop any pcb that sits around for too long
without receiving *any* packets.

-paul

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