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Date: Sat, 4 Mar 2006 13:00:15 -0500
From: Adam McDougall <mcdouga9@egr.msu.edu>
To: Max Laier <max@love2party.net>
Message-ID: <20060304180014.GB63144@egr.msu.edu>
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Cc: freebsd-net@freebsd.org, Pieter de Boer <pieter@thedarkside.nl>
Subject: Re: PR kern/93849 IP checksum broken by pf no-df over bridge
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On Sat, Mar 04, 2006 at 04:02:26PM +0100, Max Laier wrote:

  On Saturday 04 March 2006 15:51, Pieter de Boer wrote:
  > Adam McDougall wrote:
  > > Could someone possibly take a look at this and let me know if it
  > > looks 'broken' or if I might be doing something wrong?  I am in
  > > a crunch to choose a firewall solution within a few weeks and it
  > > would help me to know if this issue can be solved.  FreeBSD/pf
  > > seemed an appropriate solution so far, especially since it has
  > > CARP, pfsync, (and altq which im not using (yet?)).
  >
  > You could try compiling pf using CFLAGS=-O instead of -O2. This fixed a
  > checksum problem I had. That probably was an entirely different issue,
  > but perhaps it does help..
  
  Can you try this patch and report back instead.  Thanks and sorry for the 
  delay.
  
Other than the double (( causing a compile error, it works! Thanks.
I verified that the DF bit is clear on the other side and that the 
checksum changed, and is correct.