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Net::DNS::DomainName(3pm) User Contributed Perl Documentation Net::DNS::DomainName(3pm)
NAME
Net::DNS::DomainName - DNS name representation
SYNOPSIS
use Net::DNS::DomainName;
$object = Net::DNS::DomainName->new('example.com');
$name = $object->name;
$data = $object->encode;
( $object, $next ) = Net::DNS::DomainName->decode( \$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.
All other behaviour 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 = Net::DNS::DomainName->new('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 = Net::DNS::DomainName->decode( \$buffer, $offset, $hash );
( $object, $next ) = Net::DNS::DomainName->decode( \$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 = Net::DNS::DomainName1035->new('compressible.example.com');
$data = $object->encode( $offset, $hash );
( $object, $next ) = Net::DNS::DomainName1035->decode( \$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 = Net::DNS::DomainName2535->new('incompressible.example.com');
$data = $object->encode( $offset, $hash );
( $object, $next ) = Net::DNS::DomainName2535->decode( \$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 original copyright
notices appear in all copies and that both 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 v5.32.1 2021-12-18 Net::DNS::DomainName(3pm)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
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