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Date: Wed, 07 May 2008 08:40:56 +0100
From: "Bruce M. Simpson" <bms@incunabulum.net>
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To: Julian Elischer <julian@elischer.org>
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Cc: freebsd-net@freebsd.org, Edwin Groothuis <edwin@mavetju.org>
Subject: Re: IPPROTO_DIVERT and PF_INET6
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Julian Elischer wrote:
> actually the divert sockets should really not be in PF_INET
> they could deliver both inet and inet6 packets.
> the sockaddr that they return (and which needs to be read for divert
> to make sense) could be used to distinguish between them.

Good point. I'd forgotten that they were abusing the fields in sin_zero. 
This is not OK for IPv6, although the kludge can still be perpetuated by 
looking at sa_len and stashing what divert wants at the end of sockaddr_in6.

So there IS a case for making them a separate protocol family if 
someone's going to do a clean implementation of divert sockets for IPv6.

cheers
BMS