Ordering of nameserver addresses in resolver state struct

[Ondřej Bílka]

On Thu, Sep 19, 2013 at 11:13:39PM +0200, Michal Sekletár wrote:
> Hi glibc hackers,
> 
> I came across following fact which to me seems like an inconsistency, maybe
> worth to fix.
>
Could you file a bug for this one?
 
> Consider system which has dns resolver configured with 3 dns server
> addresses. Second address is IPv6 other two are IPv4 addresses, please keep the
> ordering in mind.
> 
> State of dns resolver is such that arrays of nameserver addresses nsaddr_list
> contains two entries and the third one contains all zeroes. This doesn't
> correspond to the order of nameservers in /etc/resolv.conf since IPv4
> nameservers are first and third in the file. However array _u._ext.nsaddrs
> containing pointers to sockaddr_in6 structures has following content : [nil, ptr
> , nil]. It reflects ordering in resolv.conf.
> 
> Is this intentional? I think that order in later case should be [ptr, nil, nil].
> 
> Cheers,
> 
> Michal