Re: [lwip-users] ip_reass stop

[Valdemar]

Thanks Simon for the addr2line tip.

When I ran it I got line 572 in function ip_reass in module ip_frag.c.

/* chain together the pbufs contained within the reass_data list. */
while(r != NULL) {
  iprh = (struct ip_reass_helper*)r->payload;  //Line 572 = 0x0103 1098
  /* hide the ip header for every succeding fragment */
  pbuf_header(r, -IP_HLEN);
  pbuf_cat(p, r);
  r = iprh->next_pbuf;
}

ip_frag was downloaded 2007-12-01.
My latest CVS download was at 2008-01-18.

Germund Asp

address@hidden skrev:
> Germund wrote:
> > Hi
> > When trying to find out why my lwip-application suddenly stops
> > receiving I found that sending an UDP block of more than 1476 bytes
> > to my application caused a memory error. I got an abort in the function
> > ip_reass at offset 0x308.
> >   
> Unfortunately, this offset is not very useful as it is probably the 
> binary offset in the program, which means it differs from platform to 
> platform and even different compiler settings produce different 
> 'offsets'. How are you compiling your program? Maybe there is a way to 
> translate the offset into a line in ip_frag.c? (If you used gcc, you can 
> get the line using the 'addr2line' program, if you used the msvc port, 
> you can turn on generating a map file when compiling and look into that 
> map file).
>
> Also: which version of lwIP are you using?
>
> Simon
>
>
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