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Date:      Fri, 01 May 1998 16:30:17 -0700
From:      David Greenman <dg@root.com>
To:        Pierre Beyssac <pb@fasterix.freenix.org>
Cc:        freebsd-net@FreeBSD.ORG
Subject:   Re: Fwd: NetBSD network code improvements 
Message-ID:  <199805012330.QAA11741@implode.root.com>
In-Reply-To: Your message of "Fri, 01 May 1998 20:58:33 %2B0200." <19980501205833.A655@fasterix.frmug.fr.net> 

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>[ discussion copied to freebsd-net, please remove -current when replying ]
>
>On Fri, May 01, 1998 at 02:13:51PM -0400, Garrett Wollman wrote:
>> We should think carefully about what WE actually WANT to do (which is
>> not necessarily the same as what NASA is paying Jason to do).
>
>I think A lot of their stuff is generally useful, the MTU discovery
>stuff for example (although I don't exactly know what is in -current
>and maybe we don't need to integrate NetBSD stuff).

   We've had Path MTU Discovery in FreeBSD for a couple of years now. It
includes support for timing out clone routes.

>The fast forwarding stuff is useful for people using FreeBSD as a
>fast router. It is modular enough that I ported it in 2 hours, and
>I'm currently running it. Everything is in one file (ip_flow.c)
>and you just need to add hooks calling it when receiving packets
>from the interfaces. Works ok for me so far between PPP and my
>ethernet (which doesn't say much about the performance improvement
>:-)). I'll send the patches to the list soon. The only problem that
>I see is that it clutters up the kernel even if you don't use it
>(in NetBSD, it is compiled in only if you have the GATEWAY option,
>but you can't do that in FreeBSD since it's a kernel configuration
>variable). We should probably make it an explicit option but other
>than that I don't see any reason for not taking it.

   Yeah, that's pretty neat stuff and I'd like to see it as part of FreeBSD.
I'm a bit concerned about its interaction (or lack of) with ipfw, however.

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project

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