Ethereal-users: [Ethereal-users] Re: pcap: network type 15 unknown or unsupported

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From: ronnie sahlberg <ronniesahlberg@xxxxxxxxx>
Date: Tue, 26 Jul 2005 05:33:52 -0400
woohoo

even TCP sequence graphs works on that capture,



now if i only can get a capture with tcp over something over tcp
everything would be even better.



On 7/5/05, Guy Harris <gharris@xxxxxxxxx> wrote:
> diaz_d1@xxxxxx wrote:
> > Can yop open this file?
> 
> I can extract the capture file from the ZIP file.
> 
> Unfortunately, the capture file is probably in Nokia's stupid format, in 
> which they modified the per-packet header to add an extra 4-byte field 
> but DIDN'T CHANGE THE MAGIC NUMBER, so an application such as Ethereal 
> can tell the difference between normal libpcap files and Nokia libpcap 
> files by trying to see whether it can successfully read part or all of 
> the file assuming it's a regular file and, if not, trying to see whether 
> it can do so assuming it's a Nokia file.  (Unfortunately, some other 
> capture file formats *also* use the standard magic number, so the 
> heuristics are a bit more complicated than that.)
> 
> The current heuristics for detecting Nokia files in Ethereal only check 
> if the link-layer type value is 13, which they use for ATM; I tried 
> adding a check for 15, but apparently the heuristics succeed for the 
> first two packets, which is all Ethereal currently tries - perhaps it 
> should try 3 packets, which it appears should be enough to tell the 
> difference between the two file types.
> 
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