Are you just trying to get the host/domain name? Since you already have the IP address (from STDIN), this will print the host/domain name: 
#/usr/bin/perl
use warnings;
use strict;
use Socket;
print "Ip address ";

my $ipaddr    = <STDIN>;
my $peer_host = gethostbyaddr(inet_aton($ipaddr), AF_INET);

print $peer_host;

[download]
Obviously, you'll want to validate the IP address.

The errors were caused by inet_ntoa expecting a packed IP address for an argument.

Cheers,
Ovid

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In reply to (Ovid)Re: DNS resolver by Ovid
in thread DNS resolver by muaddib2

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