The advanced API does not address this yet....is there any way at all to
currently join an IPv4 multicast group on an AF_INET6 socket?
Or do applications need to open a separate AF_INET socket to join v4
groups?

Thanks,
Lilian

On Mon, 11 Mar 2002, Antonio Querubin wrote:

> On Mon, 11 Mar 2002, Lilian Fernandes wrote:
>
> > I have a question about the IPV6_JOIN_GROUP socket option from
> > rfc2553bis-05. Is it intended that the user be able to use this socket
> > option to join IPv4 multicast groups as well? The user could do this by
> > specifying an IPv4-mapped IPv6 address for the IPv4 multicast address.
>
> Unfortunately the RFCs don't specifically define an IPv4-mapped IPv6
> equivalent for IPv4 multicast addresses.  That section of the IPv6 address
> architecture RFC only pertains to mapping IPv4 unicast addresses.
>
> A suggestion was made last year to address this difference in behaviour at
> the basic sockets API level since the address architecture was pretty much
> fixed already.  But that suggestion came a little too late and now it's
> been suggested that it be addressed instead in the advanced sockets API.
>
>

_____________________________________________________________________

Lilian Fernandes
AIX TCP/IP Development - IBM Austin
Tel: 512-838-7966       Fax: 512-838-3509

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