>>From sys/socket.h:
>etc. and from
>ftp://ftp.isi.edu/in-notes/iana/assignments/address-family-numbers/
>Now presumably, these are two different things both called "address families".
>Can someone enlighten me?

	afaik they are different things.  AF_INET{,6} and friends are local to
	nodes.  iana numbers are in use on some of protocol headers, like
	dhcp.

itojun