[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: getaddrinfo() and AI_CANONNAME
On Wed, Oct 18, 2000 at 03:09:59AM +0900, Jun-ichiro itojun Hagino wrote:
> your patch calls getnameinfo from inside getaddrinfo, and you are
> making reverse lookup from getnameinfo.
My patch calls getnameinfo from krb5_expand_hostname() and
krb5_expand_hostname_realms(), but NOT from getaddrinfo(). I could not do
it anyways, because I use the OS-supplied getaddrinfo().
> if AIX getaddrinfo does not return something different from
> h->h_name into ai_canonname, that is broken.
gethostbyname() returns h_name == FQDN, h_aliases == (unqualified host name).
> if you are using DNS, DNS resolver knows where it got the mapping.
I think it wouldn't be a very good idea to depend on external services like
DNS to resolve the local hostname...
> if you are using /etc/hosts, the first hostname on the list is
> considered as the canonical name.
The first hostname is a FQDN. Still, getaddrinfo() returns the unqualified
host name only. And it does so for every host defined in /etc/hosts.
Gabor Gombas Eotvos Lorand University
E-mail: firstname.lastname@example.org Hungary