Net::DNS::Update - DNS dynamic update packet
use Net::DNS; $update = new Net::DNS::Update( 'example.com', 'IN' ); $update->push( prereq => nxrrset('foo.example.com. A') ); $update->push( update => rr_add('foo.example.com. 86400 A 192.168.1.2') );
Net::DNS::Update is a subclass of Net::DNS::Packet, to be used for making DNS dynamic updates.
Programmers should refer to RFC2136 for dynamic update semantics.
$update = new Net::DNS::Update; $update = new Net::DNS::Update( 'example.com' ); $update = new Net::DNS::Update( 'example.com', 'HS' );
Returns a Net::DNS::Update object suitable for performing a DNS dynamic update. Specifically, it creates a packet with the header opcode set to UPDATE and the zone record type to SOA (per RFC 2136, Section 2.3).
Programs must use the push() method to add RRs to the prerequisite, update, and additional sections before performing the update.
Arguments are the zone name and the class. If the zone is omitted, the default domain will be taken from the resolver configuration. If the class is omitted, it defaults to IN.
The first example below shows a complete program; subsequent examples show only the creation of the update packet .
#!/usr/bin/perl use Net::DNS; # Create the update packet. my $update = new Net::DNS::Update('example.com'); # Prerequisite is that no A records exist for the name. $update->push( pre => nxrrset('foo.example.com. A') ); # Add two A records for the name. $update->push( update => rr_add('foo.example.com. 86400 A 192.168.1.2') ); $update->push( update => rr_add('foo.example.com. 86400 A 172.16.3.4') ); # Send the update to the zone's primary master. my $resolver = new Net::DNS::Resolver; $resolver->nameservers('primary-master.example.com'); my $reply = $resolver->send($update); # Did it work? if ($reply) { if ( $reply->header->rcode eq 'NOERROR' ) { print "Update succeeded\n"; } else { print 'Update failed: ', $reply->header->rcode, "\n"; } } else { print 'Update failed: ', $resolver->errorstring, "\n"; }
my $update = new Net::DNS::Update('example.com'); $update->push( prereq => yxdomain('example.com') ); $update->push( update => rr_add('example.com MX 10 mailhost.example.com') );
my $update = new Net::DNS::Update('example.com'); $update->push( prereq => nxdomain('info.example.com') ); $update->push( update => rr_add('info.example.com TXT "yabba dabba doo"') );
my $update = new Net::DNS::Update('example.com'); $update->push( prereq => yxrrset('foo.example.com A') ); $update->push( update => rr_del('foo.example.com A') );
my $update = new Net::DNS::Update('example.com'); $update->push( prereq => yxdomain('byebye.example.com') ); $update->push( update => rr_del('byebye.example.com') );
my $update = new Net::DNS::Update('example.com'); $update->push( update => rr_add('foo.example.com A 10.1.2.3') ); $update->sign_tsig( "$dir/Khmac-sha512.example.com.+165+01018.private" ); my $reply = $resolver->send( $update ); $reply->verify( $update ) || die $reply->verifyerr;
$update->sign_tsig( "$dir/Khmac-sha512.example.com.+165+01018.key" );
$update->sign_tsig( "$dir/Khmac-sha512.example.com.+165+01018.private", fudge => 60 );
my $key_name = 'tsig-key'; my $key = 'awwLOtRfpGE+rRKF2+DEiw=='; my $tsig = new Net::DNS::RR("$key_name TSIG $key"); $tsig->fudge(60); my $update = new Net::DNS::Update('example.com'); $update->push( update => rr_add('foo.example.com A 10.1.2.3') ); $update->push( additional => $tsig );
Copyright (c) 1997-2002 Michael Fuhr.
Portions Copyright (c) 2002-2004 Chris Reinhardt.
All rights reserved. This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself.
perl, Net::DNS, Net::DNS::Packet, Net::DNS::Header, Net::DNS::RR, Net::DNS::Resolver, RFC 2136, RFC 2845
To install Net::DNS, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Net::DNS
CPAN shell
perl -MCPAN -e shell install Net::DNS
For more information on module installation, please visit the detailed CPAN module installation guide.