Ethereal-dev: Re: [ethereal-dev] FCS showing up as data in packet decodes

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From: Gilbert Ramirez <gramirez@xxxxxxxxxx>
Date: Tue, 4 May 1999 16:23:39 -0500
On Tue, May 04, 1999 at 04:11:58PM -0500, Richard Sharpe wrote:
> 
> Hi,
> 
> I was chasing down some invalid packet lengths in dissect_tftp, and it
> seems to me that all ethernet packets have an FCS on the end, and in a lot
> of cases we are treating it as data, which screws things up.
> 
> Am I correct in this? If so, I suspect that we need to deal with it.
> 
> However, packets captured from the loopback interface do not seem to have
> an FCS.

Which operating system and ethernet NIC are you using? Also, is this
from a libpcap capture (that is, generated from ethereal or tcpdump)?

--gilbert