The Lounge What is on Your Mind? Reference Site Update: Enabled Dates and Times in Posts for Guests Post 303046375 by Neo on Monday 24th of August 2020 05:26:42 AM
Old 08-24-2020
Reference Site Update: Enabled Dates and Times in Posts for Guests

Dear All,

Since this site is now primarily a reference site, I have enabled (re-enabled) dates and times in all posts for guest users.
 

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Net::DNS::Update(3)					User Contributed Perl Documentation				       Net::DNS::Update(3)

NAME
Net::DNS::Update - Create a DNS update packet SYNOPSIS
use Net::DNS::Update; $update = Net::DNS::Update->new; $update = Net::DNS::Update->new('example.com', 'IN'); $update->push(prerequisite => nxrrset('foo.example.com. A')); $update->push(update => rr_add('foo.example.com. 86400 A 192.168.1.2')); DESCRIPTION
"Net::DNS::Update" is a subclass of "Net::DNS::Packet", to be used for making DNS dynamic updates. Programmers should refer to RFC 2136 for the semantics of dynamic updates. METHODS
new $update = Net::DNS::Update->new; $update = Net::DNS::Update->new('example.com'); $update = Net::DNS::Update->new('example.com', 'HS'); Returns a "Net::DNS::Update" object used to perform a DNS dynamic update operation. Specifically, it creates a packet with the header opcode set to UPDATE and zone qtype to SOA (per RFC 2136, 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. Future versions of "Net::DNS" may provide a simpler interface for making dynamic updates. EXAMPLES
The first example below shows a complete program; subsequent examples show only the creation of the update packet. Add a new host #!/usr/bin/perl -w use strict; use Net::DNS; # Create the update packet. my $update = Net::DNS::Update->new('example.com'); # Prerequisite is that no A records exist for the name. $update->push(prerequisite => 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 $res = Net::DNS::Resolver->new; $res->nameservers('primary-master.example.com'); my $reply = $res->send($update); # Did it work? if ($reply) { my $rcode = $reply->header->rcode; print 'Update ', $rcode eq 'NOERROR' ? "succeeded " : "failed: $rcode "; } else { print 'Update failed: ', $res->errorstring, " "; } Add an MX record for a name that already exists my $update = Net::DNS::Update->new('example.com'); $update->push(prerequisite => yxdomain('example.com')); $update->push(update => rr_add('example.com MX 10 mailhost.example.com')); Add a TXT record for a name that doesn't exist my $update = Net::DNS::Update->new('example.com'); $update->push(prerequisite => nxdomain('info.example.com')); $update->push(update => rr_add('info.example.com TXT "yabba dabba doo"')); Delete all A records for a name my $update = Net::DNS::Update->new('example.com'); $update->push(prerequisite => yxrrset('foo.example.com A')); $update->push(update => rr_del('foo.example.com A')); Delete all RRs for a name my $update = Net::DNS::Update->new('example.com'); $update->push(prerequisite => yxdomain('byebye.example.com')); $update->push(update => rr_del('byebye.example.com')); Perform a signed update my $key_name = 'tsig-key'; my $key_data = 'awwLOtRfpGE+rRKF2+DEiw=='; my $update = Net::DNS::Update->new('example.com'); $update->push(update => rr_add('foo.example.com A 10.1.2.3')); $update->push(update => rr_add('bar.example.com A 10.4.5.6')); $update->sign_tsig($key_name, $key_data); Another way to perform a signed update my $key_name = 'tsig-key'; my $key_data = 'awwLOtRfpGE+rRKF2+DEiw=='; my $update = Net::DNS::Update->new('example.com'); $update->push(update => rr_add('foo.example.com A 10.1.2.3')); $update->push(update => rr_add('bar.example.com A 10.4.5.6')); $update->push(additional => Net::DNS::RR->new("$key_name TSIG $key_data")); Perform a signed update with a customized TSIG record my $key_name = 'tsig-key'; my $key_data = 'awwLOtRfpGE+rRKF2+DEiw=='; my $tsig = Net::DNS::RR->new("$key_name TSIG $key_data"); $tsig->fudge(60); my $update = Net::DNS::Update->new('example.com'); $update->push(update => rr_add('foo.example.com A 10.1.2.3')); $update->push(update => rr_add('bar.example.com A 10.4.5.6')); $update->push(additional => $tsig); BUGS
WARNING: This code is still under development. Please use with caution on production nameservers. COPYRIGHT
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. SEE ALSO
perl, Net::DNS, Net::DNS::Resolver, Net::DNS::Header, Net::DNS::Packet, Net::DNS::Question, Net::DNS::RR, RFC 2136, RFC 2845 perl v5.16.3 2012-12-28 Net::DNS::Update(3)

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