From owner-freebsd-hackers  Sun Jul  6 19:02:42 1997
Return-Path: <owner-hackers>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id TAA17584
          for hackers-outgoing; Sun, 6 Jul 1997 19:02:42 -0700 (PDT)
Received: from implode.root.com (implode.root.com [198.145.90.17])
          by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id TAA17574
          for <freebsd-hackers@FreeBSD.ORG>; Sun, 6 Jul 1997 19:02:39 -0700 (PDT)
Received: from implode.root.com (localhost [127.0.0.1])
	by implode.root.com (8.8.5/8.8.5) with ESMTP id TAA19627;
	Sun, 6 Jul 1997 19:04:18 -0700 (PDT)
Message-Id: <199707070204.TAA19627@implode.root.com>
To: Archie Cobbs <archie@whistle.com>
cc: freebsd-hackers@FreeBSD.ORG
Subject: Re: VJ compression and MAX_HDR 
In-reply-to: Your message of "Sun, 06 Jul 1997 18:36:30 PDT."
             <199707070136.SAA08578@bubba.whistle.com> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Sun, 06 Jul 1997 19:04:18 -0700
Sender: owner-hackers@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

>
>>    I think the case of IP+TCP header > MLEN is more than rare...I think it 
>> never happens. Even with all options, the IP header doesn't exceed 64 bytes.
>
>(Max IP header = 64 bytes) + (max TCP header = 64 bytes) = 128 bytes > MLEN,
>no?

   Perhaps, but I don't think any of the current TCP options are large enough
for this to be a problem (I think the largest is still under 40 bytes).

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project