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Re: [lwip-users] Assert "tcp_slowtmr" in tcp.c reached


From: Simon Goldschmidt
Subject: Re: [lwip-users] Assert "tcp_slowtmr" in tcp.c reached
Date: Tue, 02 Feb 2010 14:07:21 +0100

Marco Jakobs wrote:
> So this means that there *was* a change according the PPP in 1.3.2?

Only some minor ones, but there have been big changes to PPP after 1.3.2 (only 
availabl in current CVS HEAD).

> > You *might* want to try PPP from lates CVS HEAD, but that also involves
> some changes to your system setup and how PPP is integrated. After all,
> until recently, the PPP code has been very much unmaintained for some years. I
> just started to work on it after 1.3.2 was released, but it should be more
> stable already.
> >   
> Hmmm ... this depends on your recommendation, Simon. We're using this in 
> a production environment (which is not really working according to the 
> issue above) ... if there are definitely some fixes which also covers 
> this problem, i may give it a try. In that case, what files do i have to 
> replace? ppp.c and ppp.h? I don't want to change the rest of the stack 
> to a non-stable version ...

That would be the files, yes, but ppp.c/.h from CVS HEAD won't fit cleanly with 
1.3.2 of the rest of the stack. There might be some manual work and testing 
necessary... :-(

Anyway, the bug could still be in other parts of the stack. Can you tell us 
about the rest of your setup (i.e. how many threads, how is it initialized, how 
is the ethernet/netif driver initialized, how does it pass its packets into the 
stack, is there any special code regarding timers, etc.). This might help to 
ensure your problem really lies within the PPP code.

Simon
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