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Date:      Thu, 6 Dec 2001 21:23:32 +0100 (MET)
From:      j@uriah.heep.sax.de (Joerg Wunsch)
To:        freebsd-current@freebsd.org
Subject:   Re: rev 1.61 of /sys/netinet/in.c breaks ISDN
Message-ID:  <200112062023.fB6KNWd65603@uriah.heep.sax.de>
References:  <Alexander@leidinger.net> <200112061126.fB6BQ5v00774@Magelan.Leidinger.net> <200112061352.fB6DqnE47522@hak.lan.Awfulhak.org> <20011206162840.C82299@sunbay.com>

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Ruslan Ermilov <ru@FreeBSD.ORG> wrote:

> ISTR that I4B uses some special magical destination address for some
> purpose (0.0.0.0 or something).

The magical destination address is 0.0.0.1.  It is used as a
`placeholder' address for the remote side, so you can add a route to
it.

Should probably be extended to 0.0.0.*, so you can add more than one
interface that way.  (The actual PPP negotiation for the remote side
is simply told to acceppt any suggested address, but this address is
then ignored, and the local end still uses 0.0.0.1 for routing
purposes.  This is a big hack, but the only feature you lose is to
directly access your remote router.  Any other packets have a
destination address different from the remote router anyway.)

phk has chosen 0.0.0.1 since it obviously cannot be a meaningful
statically configured address.

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)

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