Ethereal-dev: Re: [ethereal-dev] Decoding a PPTP/MPPE stream?

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From: Greg Kilfoyle <gregk@xxxxxxxxxxx>
Date: Tue, 04 Apr 2000 21:11:22 -0700
Gilbert Ramirez wrote:
> 
> On Tue, Apr 04, 2000 at 11:07:27AM -0500, Greg Kilfoyle wrote:
> >
> >
> > Hi,
> >
> > I'm attempting to debug a Linux PPTP (MPPE) session and it won't decode
> > the packets that follow the LCP negotiation.
> >
> > The first packet after LCP is an authentication packet (CHAP). The PPP
> > portion of the packet (after GRE) starts with the PPP protocol (0xc223)
> > but ethereal is expecting an address and control field.
> >
> > LCP negotiation included the 2-bytes address/control field and negotiated
> > address/control field compression.
> >
> > Any ideas?
> 
> A fix for PPP over GRE was checked into CVS a few days ago. Can you get
> the current source from CVS and try it? If you can't, I'll make a tar image
> of the source available.

I updated my CVS tree, and ran ethereal against my capture file. It
gives the same error for all packets after LCP negotiation. I guess I'm
going to have to provide some output...I'll use tethereal, and change
the addresses before submitting.

> 
> --gilbert

--
Greg Kilfoyle (gregk@xxxxxxxxxxx)