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Date: Wed, 07 May 2008 11:08:01 -0700
From: Julian Elischer <julian@elischer.org>
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To: "Bruce M. Simpson" <bms@incunabulum.net>
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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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Bruce M. Simpson wrote:
> 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. 



"they" == "me"  :-)

if we made it its own protocol family we could define our own sockaddr 
types too and have actual fields for that stuff...


> 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