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

[Adam Dunkels]

On Fri, 2002-08-16 at 23:04, Paul Sheer wrote:
> 
> >  
> > > 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.

That's when the polling functionality comes in handy - it calls the
application when the connection isn't receiving any packets.

/adam
-- 
Adam Dunkels <address@hidden>
http://www.dunkels.com/adam/

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