give this a try if you don't mind using plperlu. This was tested with Postgresql 8.0.3
create or replace function gethostbyaddr(inet) returns text
as
$$
use strict;
use Socket;
my $inet = $_[0];
my $iaddr=inet_aton($inet);
my $name = gethostbyaddr($iaddr,AF_INET);
return $name;
$$
language plperlu;
select gethostbyaddr('199.181.132.250'::inet);
---------- Original Message -----------
From: "Marcel Gsteiger" <Marcel.Gsteiger@xxxxxxxxxx>
To: <pgsql-general@xxxxxxxxxxxxxx>
Sent: Wed, 19 Oct 2005 14:36:46 +0200
Subject: function that resolves IP addresses
> Hi all
>
> Does anybody know how I could create a database function that accepts
> an INET parameter and reverse-lookups the hostname via DNS PTR lookup?
> Something like the dnsname command line utility in the djbdns package. I
> need this function for analyzing firewall logs stored in the database
> with ulogd.
>
> Any idea would much be appreciated.
>
> Regards
> --Marcel
>
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