Net::DNS::Domain(3) User Contributed Perl Documentation Net::DNS::Domain(3)NAMENet::DNS::Domain - Domain Name System domains
SYNOPSIS
use Net::DNS::Domain;
$domain = new Net::DNS::Domain('example.com');
$name = $domain->name;
DESCRIPTION
The Net::DNS::Domain module implements a class of abstract DNS domain
objects with associated class and instance methods.
Each domain object instance represents a single DNS domain which has a
fixed identity throughout its lifetime.
Internally, the primary representation is a (possibly empty) list of
ASCII domain name labels, and optional link to an arbitrary origin
domain object topologically closer to the DNS root.
The presentation form of the domain name is generated on demand and the
result cached within the object.
METHODS
new
$object = new Net::DNS::Domain('example.com');
Creates a domain object which represents the DNS domain specified by
the character string argument. The argument consists of a sequence of
labels delimited by dots.
A character preceded by \ represents itself, without any special
interpretation.
Arbitrary 8-bit codes can be represented by \ followed by exactly three
decimal digits. Character code points are ASCII, irrespective of the
character coding scheme employed by the underlying platform.
Argument string literals should be delimited by single quotes to avoid
escape sequences being interpreted as octal character codes by the Perl
compiler.
The character string presentation format follows the conventions for
zone files described in RFC1035.
name
$name = $domain->name;
Returns the domain name as a character string corresponding to the
"common interpretation" to which RFC1034, 3.1, paragraph 9 alludes.
Character escape sequences are used to represent a dot inside a domain
name label and the escape character itself.
Any non-printable code point is represented using the appropriate
numerical escape sequence.
fqdn
@fqdn = $domain->fqdn;
Returns a character string containing the fully qualified domain name,
including the trailing dot.
xname
$xname = $domain->xname;
Interprets an extended name containing Unicode domain name labels
encoded as Punycode A-labels.
Domain names containing Unicode characters are supported if the
Net::LibIDN module is installed.
label
@label = $domain->label;
Identifies the domain by means of a list of domain labels.
string
$string = $object->string;
Returns a character string containing the fully qualified domain name
as it appears in a zone file.
Characters which are recognised by RFC1035 zone file syntax are
represented by the appropriate escape sequence.
origin
$create = origin Net::DNS::Domain( $ORIGIN );
$result = &$create( sub{ new Net::DNS::RR( 'mx MX 10 a' ); } );
$expect = new Net::DNS::RR( "mx.$ORIGIN. MX 10 a.$ORIGIN." );
Class method which returns a reference to a subroutine wrapper which
executes a given constructor in a dynamically scoped context where
relative names are rooted at the specified $ORIGIN.
BUGS
Coding strategy is intended to avoid creating unnecessary argument
lists and stack frames. This improves efficiency at the expense of code
readability.
Platform specific character coding features are conditionally compiled
into the code.
COPYRIGHT
Copyright (c)2009-2011 Dick Franks.
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::LibIDN, Net::DNS, RFC1034, RFC1035, RFC5891, Unicode
Technical Report #16
perl v5.18.1 2012-12-28 Net::DNS::Domain(3)
