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



NAME
           Net::DNS::Domain - Domain Name System domains

SYNOPSIS
           use Net::DNS::Domain

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 labels, and
       optional link to an ancestor domain object topologically closer to the root of the DNS namespace.

       The presentation form of the domain name is generated on demand and the result cached within the
       object.

METHODS
   new
           $domain = new Net::DNS::Domain('example.com');

       Creates a domain object which represents the DNS domain identified by the character string argument.
       The identifier consists of a sequence of labels delimited by dots.

       The argument string consists of printable characters from the 7-bit ASCII repertoire.

       A character preceded by \ represents itself, without any special interpretation.

       Any 8-bit code point can be represented by \ followed by exactly three decimal digits.  Character
       code points are ASCII, irrespective of the encoding employed by the underlying platform.  No
       characters are associated with code points beyond 127.

       Argument strings should be delimited by single quotes to avoid escape sequences being misinterpreted
       by the compiler.

       The character string presentation format follows the conventions for zone files described in RFC1035.

   decode
           $domain = decode Net::DNS::Domain( \$buffer, $offset, $hash );

           ( $domain, $next ) = decode Net::DNS::Domain( \$buffer, $offset, $hash );

       Creates a domain object which represents the DNS domain identified by the compressed name at the
       indicated offset within the data buffer.

       The argument list consists of a reference to a scalar containing the wire-format data, specified
       offset and reference to a hash used to represent compressed names.

       The returned offset value indicates the start of the next item in the data buffer.

   encode
           $data = $domain->encode( $offset, $hash );

       Returns the wire-format representation of the domain object suitable for inclusion in a DNS packet
       buffer.

       The optional arguments are the offset within the packet data where the domain name is to be stored
       and a reference to a hash table used to index compressed names within the packet.

   name
           $name = $domain->name;

       Returns a character string corresponding to the "typical" form of domain name to which section 11 of
       RFC2181 alludes.

       The string consists of printable characters from the 7-bit ASCII repertoire.  Code points outside
       this set are represented by the appropriate numerical escape sequence.

   mailbox
           $mail = $domain->mailbox;

       Returns a character string containing the mailbox interpretation of the domain name as described in
       RFC1035 section 8.

   string
           $fqdn = $domain->string;

       Returns a character string containing the absolute name of the domain as described in RFC1035 section
       5.1.

       The string consists of printable characters from the 7-bit ASCII repertoire.  Code points outside
       this set are represented by the appropriate numerical escape sequence.

       Characters which have special meaning in a zone file, dots which are part of a domain label, and the
       escape character itself are represented by escape sequences which remove any such meaning.

BUGS
       Platform-specific parts of the code are designed to be optimised away by the compiler for reasons of
       efficiency. This is achieved at considerable expense in terms of readability.

COPYRIGHT
       Copyright (c)2009 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(1), Net::DNS, RFC1035, RFC2181.



perl v5.12.5                                     2009-12-30                              Net::DNS::Domain(3)