From owner-freebsd-hackers@FreeBSD.ORG  Sat Mar  8 10:32:05 2008
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From: Hans Petter Selasky <hselasky@c2i.net>
To: freebsd-hackers@freebsd.org
Date: Sat, 8 Mar 2008 11:33:02 +0100
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Subject: Documentation on writing a custom socket
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Hi,

I'm planning to create a new socket type in FreeBSD called AF_Q921, which is 
to be used for ISDN telephony. Where do I find documentation on how to 
implement a new socket in the kernel ?

--HPS