[Python-Dev] IPv6 bug in 2.3.4??

"Martin v. Löwis" martin at v.loewis.de
Thu Oct 28 20:10:42 CEST 2004

David G Mills wrote:
> First off I'd like to point out that when host is set to a fully 
> qualified domain name, comp.foo.org for example, the correct behaviour is 
> seen, getaddrinfo returns an IPv4 and IPv6 address, and when the socket is 
> created, it binds to the IPv6 address. Only when localhost is used does it 
> fail to find an IPv6 address. Now there's nothing wrong with the 
> /etc/hosts file, as I tested with the one from the working machine. Also 
> when using AF_INET6 and host=localhost it works fine, which is why I am 
> puzzled.

Ah, ok. It wasn't quite clear to me what specifically you consider an

As Evan Jones says, Python returns the data in the very same way in
which the C library returns them

> Thanks for the glibc information, I shall investigate down that path 
> and see what I can discover, but if you can think of anything else that 
> might be causing this I'd like to hear it. =)

On my system, it would be /etc/hosts, which reads localhost mira
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

So I find it perfectly ok that "localhost" only resolves to IPv4.


More information about the Python-Dev mailing list