Date: Wed, 19 Nov 2008 16:45:26 +0100 From: Max Laier <max@love2party.net> To: freebsd-net@freebsd.org Cc: Randall Stewart <rrs@lakerest.net> Subject: Re: Thinking about UDP and tunneling Message-ID: <200811191645.26701.max@love2party.net> In-Reply-To: <D72E9703-C8E7-4A21-A71E-A4B4C2D7E8F4@lakerest.net> References: <D72E9703-C8E7-4A21-A71E-A4B4C2D7E8F4@lakerest.net>
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On Wednesday 19 November 2008 16:00:27 Randall Stewart wrote:
> Dear All:
>
> I have been contemplating UDP and tunneling. One of the
> things that is a nice feature in MacOS is the ability of
> a kernel module/extension to open a kernel level socket
> and have the mbuf chain that arrives for that port be passed
> in via a function.
>
> We use this in our MacOS version of the SCTP stack to do the
> UDP de-tunneling of SCTP packets. This is becoming a more and
> more common thing i.e. having transport protocols like SCTP and DCCP
> be tunneled over UDP to get by NAT's.... this actually sucks that
> this is necessary .. but it is what it is....
>
> So, I am contemplating adding a similar sort of feature... basically
> provide an interface in UDP that a consumer (such as SCTP or DCCP) could
> use to "bind" a port and get UDP packets directly.
>
> What do you all think of the idea?
What is wrong with the existing socket(9) API?
> That also reminds me.. who owns the ipfw code.. we actually
> have SCTP nat support that Jason But has done that we need to
> get in...
>
> I would be more than glad to shepherd this in if the owner
> of the code does not have the time...
"Depends ..." ... for ipfw2 core you might be looking for luigi@, for the
libalias stuff: piso@ did the kernel inclusion more or less recently ... other
than that:
svn log -qr HEAD:\{2006-01-01\} | grep ^r | cut -d"|" -f2 | sort | \
uniq -c | sort
in sys/netinet/libalias gives a list of people who touched that code recently
(for some definition of recently).
I'd be happy to take a look, too ... though I might need some time for a
proper review.
In general, you touch it you bought it!
--
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