Date: Wed, 21 Jun 2000 17:57:08 +0100 From: Brian Somers <brian@Awfulhak.org> To: Nik Clayton <nik@FreeBSD.ORG> Cc: net@FreeBSD.ORG, brian@hak.lan.Awfulhak.org Subject: Re: No route for 127/8 to lo0 Message-ID: <200006211657.RAA45382@hak.lan.Awfulhak.org> In-Reply-To: Message from Nik Clayton <nik@FreeBSD.ORG> of "Tue, 20 Jun 2000 20:17:34 -0000." <20000620201733.A665@kilt.nothing-going-on.org>
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[.....]
> Is there some special-case for 127/8 that's covered by the "For most
> purposes" line?
>
> If you look in src/sys/netinet/in.c:in_ifinit() (around line 700) you'll
> see that IFF_LOOPBACK is special cased in the code to only add a host
> route, rather than a network route, and it's been like that for about 15
> years or so.
>
> At the moment I just have a /usr/local/etc/rc.d/local-route.sh script
> which runs
>
> route add -net 127 -interface lo0
>
> at startup. But it's a bit of a kludge. . .
I think the real problem here is that the networking code in general
treats IFF_LOOPBACK as a non-IFF_BROADCAST interface. I don't think
anything would break if this was changed, but I'd definitely think
that a ``remove the broadcast bit'' ioctl would be in order - so that
the old behaviour could be achieved.
> N
> --
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--
Brian <brian@Awfulhak.org> <brian@[uk.]FreeBSD.org>
<http://www.Awfulhak.org>; <brian@[uk.]OpenBSD.org>
Don't _EVER_ lose your sense of humour !
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