Created
February 23, 2012 19:02
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#!/usr/bin/perl -w | |
# Copyright (C) 2005, 2006 Arne Jørgensen | |
# Author: Arne Jørgensen <arne@arnested.dk> | |
# This program is free software; you can redistribute it and/or modify | |
# it under the terms of the GNU General Public License as published by | |
# the Free Software Foundation; either version 2 of the License, or (at | |
# your option) any later version. | |
# This program is distributed in the hope that it will be useful, but | |
# WITHOUT ANY WARRANTY; without even the implied warranty of | |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
# General Public License for more details. | |
# You should have received a copy of the GNU General Public License | |
# along with this program; if not, write to the Free Software | |
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
# USA. | |
### Commentary: | |
# I use this script to update my dynamic ip address at GratisDNS. | |
### Code: | |
use strict; | |
use Net::DNS; | |
use Net::HTTPS; | |
use Net::Netrc; | |
# domanins at GratisDNS to update | |
my @domains = ('arnested.dk', | |
'rrc-wurfel.dk', | |
'xn--rrc-wrfel-u9a.dk', # rrc-würfel.dk | |
'xn--jssen-vua.dk', # jøssen.dk | |
'joessen.dk', | |
'ctan.dk'); | |
my $resolver = Net::DNS::Resolver->new; | |
my $ip = get_ip('arnested.dyndns.org'); | |
if ( not defined $ip ) { | |
die "Could not resolve my own IP number.\n"; | |
} | |
my $server = Net::HTTPS->new(Host => "ssl.gratisdns.dk") || die $@; | |
my $mach = Net::Netrc->lookup('ssl.gratisdns.dk'); # read ~/.netrc | |
my $username = $mach->login; # username at gratisdns.dk | |
my $password = $mach->password; # ddns password at gratisdns.dk | |
$resolver->nameservers("ns1.gratisdns.dk", "ns2.gratisdns.dk"); | |
foreach my $domain (@domains) { | |
update_ip($domain); | |
} | |
sub get_ip { | |
my $answer = $resolver->query($_[0], 'A'); | |
if ($answer) { | |
foreach my $rr (grep {$_->{'type'} eq "A"} $answer->answer) { | |
return $rr->{'address'}; | |
} | |
} | |
} | |
sub update_ip { | |
my $host = $_[0]; | |
my @domain = split /\./, $host; | |
my $domain = $domain[$#domain-1] . "." . $domain[$#domain]; | |
my $hip = get_ip($host); | |
if ( defined $hip) { | |
if ( $ip ne $hip ) { | |
$server->write_request(GET => "/ddns.phtml?u=$username&p=$password&d=$host&h=$domain"); | |
} | |
} else { | |
warn "Could not resolve IP number for $domain.\n"; | |
} | |
} | |
# update-dns ends here |
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