netdev - Re: Add PGM protocol support to the IP stack

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Message-ID: <alpine.DEB.2.00.1003290952410.14606@router.home>
Date:	Mon, 29 Mar 2010 10:00:57 -0500 (CDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Andi Kleen <andi@...stfloor.org>
cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Add PGM protocol support to the IP stack

On Sat, 27 Mar 2010, Andi Kleen wrote:

> On Fri, Mar 26, 2010 at 12:33:07PM -0500, Christoph Lameter wrote:
> > Here is a pgm.7 manpage describing how the socket API could look like for
> > a PGM implementation.
> >
> > I dumped the RM_* based socket options from the other OS since most of the
> > options were unusable.
>
> I did a quick read and the manpage/interface seem reasonable to me.

Thanks. I will then proceed to get a patch out that implements the
network environment. Then we can plug the openpgm logic in there.

> You changed the parameter struct fields to lower case. While
> that looks definitely more Linuxy than before does it mean programs
> have to #ifdef this? It might be good idea to have at least some
> optional compat header that #defines.

The socket API will be completely different. The basic handling of the
sockets is the same (binding, listening, connecting). There is no way of
mapping M$ socket options to Linux socket options with the approach that
I proposed in the manpage. The stats structure is different too since some
key elements were missing.

What users are there of the M$ api? I have seen vendors supplying their
own pgm implementation (guess due to bit rot in the old M$
implementation).

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