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Date:      Fri, 27 Feb 2004 14:36:30 +0600
From:      Alexey Dokuchaev <danfe@nsu.ru>
To:        Dag-Erling Sm?rgrav <des@des.no>
Cc:        Sam Leffler <sam@errno.com>
Subject:   Re: cvs commit: src/sys/contrib/pf/net if_pflog.c if_pflog.h if_pfsync.c if_pfsync.h pf.c pf_ioctl.c pf_norm.c pf_osfp.c pf_table.c pfvar.h src/sys/contrib/pf/netinet in4_cksum.c
Message-ID:  <20040227083630.GC54056@regency.nsu.ru>
In-Reply-To: <xzpptc10vvv.fsf@dwp.des.no>
References:  <200402260234.i1Q2YDx1014240@repoman.freebsd.org> <20040226060126.GA70201@troutmask.apl.washington.edu> <20040226080517.GA29763@cat.robbins.dropbear.id.au> <20040226015016.B23674@xorpc.icir.org> <403DC956.8EA364B2@freebsd.org> <20040226071123.A31631@xorpc.icir.org> <565913D0-68E2-11D8-AE91-000A95AD0668@errno.com> <xzpptc10vvv.fsf@dwp.des.no>

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On Fri, Feb 27, 2004 at 09:28:04AM +0100, Dag-Erling Sm?rgrav wrote:
> Sam Leffler <sam@errno.com> writes:
> > I made two attempts to eliminate all the ipfw-, dummmynet-, and
> > bridge-specific code in the ip protocols but never got stuff to the
> > point where I was willing to commit it.  My main motivation for doing
> > this was to eliminate much of the incestuous behaviour so that you
> > could reason about locking requirements but there were other benefits
> > (e.g. I was also trying to make the ip code more "firewall agnostic").
> 
> The ideal solution would be to convert the entire networking stack to
> netgraph nodes; we could then insert filter nodes at any point in the
> graph.

That idea was attracting my attention for quite some time, probably
since when emax' bluetooth stuff hit the tree.  It seems the most
generic and coherent approach; especially provided that all core
functionality is already implemented and well-tested, and there are lots
of real-life NG-based solutions already available that come with both
stock FreeBSD and from third parties.  I'm also wondering how far is it
possible to push NG usage into the kernel; e.g. can USB stack be
converted to it (seeing analogy with bluetooth here)?

./danfe



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