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Date: Wed, 6 Oct 2004 12:44:20 -0400
From: Barney Wolff <barney@databus.com>
To: Petri Helenius <pete@he.iki.fi>
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cc: FreeBSD-net <freebsd-net@freebsd.org>
cc: Waldemar Kornewald <Waldemar.Kornewald@web.de>
cc: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
Subject: Re: modularization
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On Wed, Oct 06, 2004 at 07:30:43PM +0300, Petri Helenius wrote:
> Garrett Wollman wrote:
> 
> ><<On Wed, 06 Oct 2004 17:57:14 +0200, Waldemar Kornewald 
> ><Waldemar.Kornewald@web.de> said:
> >
> >>Yes, something in that direction, plus: protocols:
> >>IPv4, IPv6, TCP, UDP, ICMP, IPX, etc.
> >>Just about everything as modules.
> >
> >It is not generally regarded as a good idea to make artificial
> >boundaries between (e.g.) IP and TCP.
> >
> However from the success of the OSI/IP and related (CLNS, TP4, etc) 
> protocols it can said that it's a good way to fail.

It's important to make a distinction between specification and
implementation.  Protocols should be designed and defined with clear
boundaries between layers, but protocol handlers need not, and
often should not, be implemented that way.

-- 
Barney Wolff         http://www.databus.com/bwresume.pdf
I'm available by contract or FT, in the NYC metro area or via the 'Net.