From owner-freebsd-hackers  Mon Jun 15 12:28:49 1998
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To: hans@brandinnovators.com (Hans Zuidam)
cc: jdp@polstra.com (John Polstra), hackers@FreeBSD.ORG
Subject: Re: TCP sequence numbers 
In-reply-to: Message from hans@brandinnovators.com (Hans Zuidam) 
	<199806150637.IAA11326@truk.brandinnovators.com> .
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Date: Mon, 15 Jun 1998 15:28:02 -0400
From: Dennis Rockwell <dennis@bbn.com>
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On 15 Jun, Hans Zuidam wrote:

> > John Polstra wrote:
> > [ ... ] Tcpdump prints TCP sequence numbers in relative form,
> > relative to the initial one, unless you give it the "-S" option.  Your
> > traces should match already, except for the initial packet from each
> > side.
> But the other side cannot "tcpdump", it's an embedded system from
> which I can only get absolute sequence numbers ;-(  Also, trpt(8)
> dumps it's sequence numbers in abosolute (hex) numbers, that's easy
> to change.

If you're doing the comparisons under FreeBSD, it's a
dead-trivial AWK or perl script to normalize the sequence
numbers.

Or are you comparing printouts from two different systems,
rather than files online?

Dennis Rockwell                 dennis@bbn.com
GTE Internetworking
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