Ubuntu Manpage: Net::DNS::Domain - Domain Name System domains

Provided by: libnet-dns-perl_0.68-1.2build1_amd64

NAME

       Net::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.

Domain names containing Unicode characters are supported if the Net::LibIDN module is
installed.

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.

identifier
$identifier = $domain->identifier;

Identifies the domain by means of its uninterpreted A-label form of domain name.

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 will execute a given
constructor in a context within which $ORIGIN is defined.

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.

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