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Date:      Sun, 18 Aug 1996 19:28:56 -0700 (PDT)
From:      Archie Cobbs <archie@whistle.com>
To:        phk@critter.tfs.com (Poul-Henning Kamp)
Cc:        imp@village.org, jkh@time.cdrom.com, ugen@latte.worldbank.org, hackers@freebsd.org
Subject:   Re: ipfw vs ipfilter
Message-ID:  <199608190228.TAA26457@bubba.whistle.com>
In-Reply-To: <6538.840379353@critter.tfs.com> from "Poul-Henning Kamp" at Aug 18, 96 04:42:33 pm

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> >One of our paranoid villagers recently did a code review on ipfw.  He
> >said it was OK, but found a couple of problems.  Specifically, the
> >code lacked comments, there was a bug in the IP header fragment
> >discarding code (if the offset was one, it would discard the fragment,
> >but not when it was 2, it should properly discard the fragment for all
> >offsets > 0 < the size of the headers), it assumed that the user
>
> This is a common mistake, only offset==1 needs to be discarded.

Uh huh, and see RFC 1858 for a "proof."

-Archie

___________________________________________________________________________
Archie L. Cobbs, archie@whistle.com  *  Whistle Communications Corporation



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