Re: [lwip-users] [lwip]Stack crashing with huge ICMP packets

[Dennis Borgmann]

Hi Kieran,
hi Simon,

thank you for your thoughts on my problem. So far I have solved the 
problem by simply setting IP_REASSEMBLY and IP_FRAG both to "0". That 
way no fragmented packes are processed at all and since I am only using 
a tftp, this shouldn't happen anyway and it works for me.

Thanks anyway. Maybe one day, if I get the time to do so, I might try 
lwIP 1.4.

Best regards,
Dennis


Am 27.01.2012 21:52, schrieb Simon Goldschmidt:
> Kieran Mansley<address@hidden>  wrote:
>
> > > As long as I stay below 1536, everything just runs fine.
> > I think it could just be that the ping code in that release assumes that the 
> > whole datagram will fit in a single packet.  When you exceed the MTU the 
> > datagram will be fragmented and I doubt the code has been written to cope with 
> > that.
> Hmm, I also thought about that, but 1536 is already bigger than the MTU, isn't 
> it?
>
> > I would try and see if (i) the more recent versions of lwIP do what you want
> Definitively. And if not, it will be much easier to try and reproduce the 
> problems you are seeing.
>
> Simon
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