On Tue, 25 Sep 2012, Marcin Cieslak wrote:
> On Mon, 24 Sep 2012, Jon Trulson wrote:
>
>> If I read this right, the connection will only be rejected if a
>> request come in over IP6 - which should not be able to happen with
>> current CDE, right?
>
> Depending on your operating system + libc combination you may
> send an IPv4 connection to (x)inetd from the ToolTalk client
> and yet the daemon will receive a dualstack socket, because
> (x)inetd supports both. In FreeBSD's /etc/inetd.conf you can
> say "rpc/udp4" or something like that:
>
> The protocol must be a valid protocol or ``unix''. Examples are ``tcp''
> or ``udp'', both of which imply IPv4 for backward compatibility. The
> names ``tcp4'' and ``udp4'' specify IPv4 only. The names ``tcp6'' and
> ``udp6'' specify IPv6 only. The names ``tcp46'' and ``udp46'' specify
> that the entry accepts both IPv4 and IPv6 connections via a wildcard
> AF_INET6 socket. Rpc based services are specified with the ``rpc/tcp''
> or ``rpc/udp'' service type. One can use specify IPv4 and/or IPv6 with
> the 4, 6 or 46 suffix, for example ``rpc/tcp6'' or ``rpc/udp46''. TCPMUX
> services must use ``tcp'', ``tcp4'', ``tcp6'' or ``tcp46''.
>
> I guess that xinetd can do exactly the same. There is some
> heavy discussion about dual stack socket in the community,
> OpenBSD doesn't have them enabled (at least be default),
> FreeBSD can have them switched off using kernel tuning parameter (they
> are on by default).
>
According to what you posted above:
"Examples are ``tcp'' or ``udp'', both of which imply IPv4 for
backward compatibility."
Since that is what is already there (udp and tcp), I think it is
fine the way it is.
--
Jon Trulson
The Higgs Field is what make atoms matter.
-- Tom L.
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