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From: Robert Watson <rwatson@FreeBSD.org>
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To: Attila Nagy <bra@fsn.hu>
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Cc: svn-src-head@freebsd.org, Adrian Chadd <adrian@freebsd.org>,
	src-committers@freebsd.org, svn-src-all@freebsd.org,
	Julian Elischer <julian@elischer.org>
Subject: Re: svn commit: r186955 - in head/sys: conf netinet
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On Sat, 10 Jan 2009, Attila Nagy wrote:

>> Well, they can be used mostly interchangably - they socket option is just 
>> implemented at a different layer.
>> 
>> Porting should be a case of a simple #ifdef. :)
> 
> I wonder what pf changes are needed..

I think Julian's analysis, that this is more of an inet option than a 
socket-layer option, seems more appropriate to me, the benefits of portability 
in adopting the API used by OpenBSD/BSDI/etc seem more compelling.  We should 
make sure that, if we move to the socket option used on those systems, we 
block setting it on non-supporting protocols, or confusion will result.  In 
particular, Adrian's change only modified IPv4, not IPv6, so until it's 
implemented on IPv6 it shouldn't be possible to set the option.

Robert N M Watson
Computer Laboratory
University of Cambridge