Date: Fri, 21 Jan 2000 00:36:58 +0000 From: Brian Somers <brian@Awfulhak.org> To: Alfred Perlstein <bright@cygnus.rush.net> Cc: Brian Somers <brian@Awfulhak.org>, des@FreeBSD.ORG, hackers@FreeBSD.ORG, brian@hak.lan.Awfulhak.org Subject: Re: ioctl(... TUNSLMODE ...) Message-ID: <200001210036.AAA00691@hak.lan.Awfulhak.org> In-Reply-To: Message from Alfred Perlstein <bright@cygnus.rush.net> of "Thu, 20 Jan 2000 15:35:02 PST." <20000120153502.A14030@fw.wintelcom.net>
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> * Brian Somers <brian@Awfulhak.org> [000120 15:30] wrote:
> > Hi,
> >
> > I know this is a while in coming, but now that I'm looking at getting
> > ppp(8) to talk IPv6 (with the help of some KAME patches), I've looked
> > at how TUNSLMODE is implemented... it doesn't look good to me.
> >
> > What's the rationale behind stuffing the entire sockaddr in front of
> > the packet ? AFAIK the only information of any use is the address
> > family.
> >
> > By default, OpenBSD has a u_int32_t in front of every packet (I
> > believe this is unconfigurable), and I think this is about the most
> > sensible thing to do - I don't see that alignment issues will cause
> > problems.
> >
> > Alfred, this was originally submitted by you. Do you have any
> > argument against me changing it to just stuff the address family
> > as a 4-byte network-byte-order quantity there ?
> >
> > Any other opinions/arguments ?
>
> No objections, I just did it as an excercise to implement something
> in the manpages.
I think the best plan is if I remove TUNSLMODE and introduce (say)
TUNSIFHEAD. If I reuse TUNSLMODE, I'll bump into all sorts of
problems.
Now if someone was to say ``NetBSD does it this way'' I'd be
interested in copying that :*]
> --
> -Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org]
>
--
Brian <brian@Awfulhak.org> <brian@FreeBSD.org>
<http://www.Awfulhak.org>; <brian@OpenBSD.org>
Don't _EVER_ lose your sense of humour ! <brian@FreeBSD.org.uk>
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