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Net::DNS::DomainName(3User Contributed Perl DocumentaNet::DNS::DomainName(3pm)

NAME
       Net::DNS::DomainName - DNS name representation

SYNOPSIS
	   use Net::DNS::DomainName;

	   $object = new Net::DNS::DomainName('example.com');
	   $name = $object->name;
	   $data = $object->encode;

	   ( $object, $next ) = decode Net::DNS::DomainName( \$data, $offset );

DESCRIPTION
       The Net::DNS::DomainName module implements the concrete representation
       of DNS domain names used within DNS packets.

       Net::DNS::DomainName defines methods for encoding and decoding wire
       format octet strings as defined in RFC1035. All other behaviour,
       including the new() constructor, is inherited from Net::DNS::Domain.

       The Net::DNS::DomainName1035 and Net::DNS::DomainName2535 packages
       implement disjoint domain name subtypes which provide the name
       compression and canonicalisation specified by RFC1035 and RFC2535.
       These are necessary to meet the backward compatibility requirements
       introduced by RFC3597.

METHODS
   new
	   $object = new Net::DNS::DomainName('example.com');

       Creates a domain name object which identifies the domain specified by
       the character string argument.

   canonical
	   $data = $object->canonical;

       Returns the canonical wire-format representation of the domain name as
       defined in RFC2535(8.1).

   decode
	   $object = decode Net::DNS::DomainName( \$buffer, $offset, $hash );

	   ( $object, $next ) = decode Net::DNS::DomainName( \$buffer, $offset, $hash );

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

       The argument list consists of a reference to a scalar containing the
       wire-format data and specified offset. The optional reference to a hash
       table provides improved efficiency of decoding compressed names by
       exploiting already cached compression pointers.

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

   encode
	   $data = $object->encode;

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

Net::DNS::DomainName1035
       Net::DNS::DomainName1035 implements a subclass of domain name objects
       which are to be encoded using the compressed wire format defined in
       RFC1035.

	   use Net::DNS::DomainName;

	   $object = new Net::DNS::DomainName1035('compressible.example.com');
	   $data   = $object->encode( $offset, $hash );

	   ( $object, $next ) = decode Net::DNS::DomainName1035( \$data, $offset );

       Note that RFC3597 implies that the RR types defined in RFC1035 section
       3.3 are the only types eligible for compression.

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

       Returns the wire-format representation of the domain name 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.

       If the hash reference is undefined, encode() returns the lowercase
       uncompressed canonical representation defined in RFC2535(8.1).

Net::DNS::DomainName2535
       Net::DNS::DomainName2535 implements a subclass of domain name objects
       which are to be encoded using uncompressed wire format.

       Note that RFC3597, and latterly RFC4034, specifies that the lower case
       canonical encoding defined in RFC2535 is to be used for RR types
       defined prior to RFC3597.

	   use Net::DNS::DomainName;

	   $object = new Net::DNS::DomainName2535('incompressible.example.com');
	   $data   = $object->encode( $offset, $hash );

	   ( $object, $next ) = decode Net::DNS::DomainName2535( \$data, $offset );

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

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

       If the hash reference is undefined, encode() returns the lowercase
       canonical form defined in RFC2535(8.1).

COPYRIGHT
       Copyright (c)2009-2011 Dick Franks.

       All rights reserved.

LICENSE
       Permission to use, copy, modify, and distribute this software and its
       documentation for any purpose and without fee is hereby granted,
       provided that the above copyright notice appear in all copies and that
       both that copyright notice and this permission notice appear in
       supporting documentation, and that the name of the author not be used
       in advertising or publicity pertaining to distribution of the software
       without specific prior written permission.

       THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
       OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
       MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
       IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
       CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
       TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
       SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

SEE ALSO
       perl, Net::DNS, Net::DNS::Domain, RFC1035, RFC2535, RFC3597, RFC4034

perl v5.26.0			  2017-07-31	     Net::DNS::DomainName(3pm)
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