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[Bug network/9981] getaddrinfo(NULL) with AI_PASSIVE returns 0.0.0.0 (IPv4-only) and :: (IPv6+IPv4) in this order


https://sourceware.org/bugzilla/show_bug.cgi?id=9981

--- Comment #8 from Ondrej Bilka <neleai at seznam dot cz> ---
On Sat, May 31, 2014 at 12:52:45AM +0000, aoliva at sourceware dot org wrote:
> https://sourceware.org/bugzilla/show_bug.cgi?id=9981
> 
> Alexandre Oliva <aoliva at sourceware dot org> changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                  CC|                            |aoliva at sourceware dot org
> 
> --- Comment #7 from Alexandre Oliva <aoliva at sourceware dot org> ---
> Created attachment 7624
>   --> https://sourceware.org/bugzilla/attachment.cgi?id=7624&action=edit
> Don't sort passive localhost addresses, so that IPv6+IPvv4 remains first and
> IPv4-only, last
> 
> I don't think it ever makes any sense for us to ever try to sort passive
> addresses: we always generate them IPv6+IPv4 first and IPv4-only last, with at
> most two adresses and possibly only one if we asked for a specific family. 
> Since the former is always preferred, it doesn't make sense to try to sort
> them.
> 
> The only doubt is whether to generate both when the first covers both; I'm not
> when dropping the latter is safe, so I'm leaving that unrelated decision out
> for now.
> 
> Any reason to not go with this patch?
> 
Possible, you should send this to libc-alpha to get comments.

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