From owner-freebsd-net  Fri Mar 19 17:41: 7 1999
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Date: Fri, 19 Mar 1999 17:36:29 -0800
From: Julian Elischer <julian@whistle.com>
Organization: Whistle Communications
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To: Chris Csanady <cc@137.org>
Cc: freebsd-net@FreeBSD.ORG
Subject: Re: Integrating the NetBSD PFIL hooks..
References: <19990320012046.01210B9@friley-185-205.res.iastate.edu>
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Chris Csanady wrote:
> 
> What would it take for us to intergrate NetBSD's PFIL hooks?  It is
> hard to do much work in the current network stack with so much of
> the mess that currently exists.  At the very least, ip_input.c and
> ip_output.c would be much cleaner with this mechanism.
> 
> I'm just wondering what needs to be done, and if it is possible.
> Ipfilter would already support this, but how about ipfw, dummynet,
> divert and such?  Would the authors of the respective code be
> willing to help out with the necessary changes?
> 
> Chris Csanady
> 
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Certainly 
though I haven't looked..
It certainly looks like it could use some cleaning.. It's suffering
from 'evolutionary changes'.

We at whistle have to take a lot of the blame.
We implemented 'divert' sockets after a suggestion from
one of the CSRG guys. (forget his name.. the Kieth that was 
not a Bostic)

The divert functionality adds a lot of possibilities but it has its
tentacles all over the place.  The 'fwd' option of ipfw has a few
tentacles reaching as far as tcp_input.

The dummynet stuff I can't comment on so much..

julian


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