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Date: Fri, 27 Feb 2004 10:43:39 -0800 (PST)
From: Nate Lawson <nate@root.org>
To: Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?= <des@des.no>
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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
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On Fri, 27 Feb 2004, Dag-Erling [iso-8859-1] Sm=F8rgrav wrote:
> Luigi Rizzo <rizzo@icir.org> writes:
> > I believe this (convert the entire networking stack to netgraph
> > nodes) is completely unfeasible.
>
> It shouldn't be.  Open any textbook on computer networking and you'll
> find that netgraph is the canonical way to organize a protocol stack.
>
> > There are interactions among subsystems all over the place.
>
> Otherwise known as "layering violations" and "bugs".

Not necessarily.  I like Dave Clark's point that layers are a good way to
specify networking standards but a poor way to implement them.  This talk
is old but gives good info on one way of doing it:

http://www.root.org/ip-development/talks/vj-nkarch.ps.gz

-Nate