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Date: Fri, 15 May 1998 11:38:59 +0200
From: Pierre.Beyssac@hsc.fr (Pierre Beyssac)
To: itojun@itojun.org (Jun-ichiro itojun Itoh)
Cc: net@FreeBSD.ORG
Subject: Re: INRIA IPv6 on FreeBSD
References: <19980515005841.C18577@fasterix.frmug.fr.net> <1089.895201195@coconut.itojun.org>
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In-Reply-To: <1089.895201195@coconut.itojun.org>; from Jun-ichiro itojun Itoh on May 15, 1998 11:59:55 +0900
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According to Jun-ichiro itojun Itoh:
> I'm now looking into INRIA for FreeBSD 2.2.5-RELEASE (4/29/98 I think)
> but I see both sys/netinet/tcp_input.c and sys/netinet/tcp6_input.c,
> which are almost identical.
> Am I mistaking something, or obsoleted source is left in the tree?
What you're seeing is the "older" implementation. They only did the
sharing for NetBSD yet. I have no idea how much work it would be port
this to FreeBSD-current (or even 2.2.x), but that would certainly
be interesting.
> WIDE stack is also thinking about tcp4/6 and udp4/6 merge too and
> about good/bad points of merged one and separate one. Problem for
> us is that we have to do the merge for FreeBSD, NetBSD and BSDI
> separately (since they modified tcp/udp code separately...)
Yes, I experienced that too: even between FreeBSD 2.2.5 and -current,
you have substantial differences, especially in the TCP code organization.
The ones I remember are:
- PCB hash table
- tcp_rspsomething vs tcp_respond
- usrreq handling (switch vs function table)
- multicast addresses recognition
- little details such as time_second/getmicrotime stuff
and there are certainly a couple of others I forget about.
Adapting all this is not very difficult but it takes some work and
checking. I haven't finished checking yet there are no places I left
some older code.
--
Pierre.Beyssac@hsc.fr
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