>> >if you're doing a bind to an INET6 socket and using an appropriately
>> >sized sockaddr in the accept call, can't you just check the ipv6
>> >address in the resulting sockaddr via the IN6_IS_ADDR_V4MAPPED() macro
>> >(from rfc2133, and superceded by rfc2553)?
>
>But you don't want the connections to match the listening socket at all
>so the connecting system gets ECONNREFUSED and not an arbitrarily closed
>socket.

ah...well, yes.  in that case, you would want a sysctl and/or a
setsockopt to affect this.  i was misled when someone said the
application didn't know what was connecting...since you can obviously
tell.

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