Net::DNS::Question(3pmUser Contributed Perl DocumentatiNet::DNS::Question(3pm)NAMENet::DNS::Question - DNS question record
SYNOPSIS
use Net::DNS::Question;
$question = new Net::DNS::Question('example.com', 'A', 'IN');
DESCRIPTION
A Net::DNS::Question object represents a record in the question section
of a DNS packet.
METHODS
new
$question = new Net::DNS::Question('example.com', 'A', 'IN');
$question = new Net::DNS::Question('example.com');
$question = new Net::DNS::Question('192.0.32.10', 'PTR', 'IN');
$question = new Net::DNS::Question('192.0.32.10');
Creates a question object from the domain, type, and class passed as
arguments. One or both type and class arguments may be omitted and will
assume the default values shown above.
RFC4291 and RFC4632 IP address/prefix notation is supported for queries
in both in-addr.arpa and ip6.arpa namespaces.
decode
$question = decode Net::DNS::Question(\$data, $offset);
($question, $offset) = decode Net::DNS::Question(\$data, $offset);
Decodes the question record at the specified location within a DNS
wire-format packet. The first argument is a reference to the buffer
containing the packet data. The second argument is the offset of the
start of the question record.
Returns a Net::DNS::Question object and the offset of the next location
in the packet.
An exception is raised if the object cannot be created (e.g., corrupt
or insufficient data).
encode
$data = $question->encode( $offset, $hash );
Returns the Net::DNS::Question in binary format suitable for inclusion
in a DNS packet buffer.
The optional arguments are the offset within the packet data where the
Net::DNS::Question is to be stored and a reference to a hash table used
to index compressed names within the packet.
print
$object->print;
Prints the record to the standard output. Calls the string() method to
get the string representation.
string
print "string = ", $question->string, "\n";
Returns a string representation of the question record.
name
$name = $question->name;
Internationalised domain name corresponding to the qname attribute.
Decoding non-ASCII domain names is computationally expensive and
undesirable for names which are likely to be used to construct further
queries.
When required to communicate with humans, the 'proper' domain name
should be extracted from a query or reply packet.
$query = new Net::DNS::Packet( $example, 'ANY' );
$reply = $resolver->send($query) or die;
($question) = $reply->question;
$name = $question->name;
qname, zname
$qname = $question->qname;
$zname = $question->zname;
Canonical ASCII domain name as required for the query subject
transmitted to a nameserver. In dynamic update packets, this attribute
is known as zname() and refers to the zone name.
qtype, ztype, type
$qtype = $question->type;
$qtype = $question->qtype;
$ztype = $question->ztype;
Returns the question type attribute. In dynamic update packets, this
attribute is known as ztype() and refers to the zone type.
qclass, zclass, class
$qclass = $question->class;
$qclass = $question->qclass;
$zclass = $question->zclass;
Returns the question class attribute. In dynamic update packets, this
attribute is known as zclass() and refers to the zone class.
COPYRIGHT
Copyright (c)1997-2000 Michael Fuhr.
Portions Copyright (c)2002,2003 Chris Reinhardt.
Portions Copyright (c)2003,2006-2011 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::DomainName, Net::DNS::Packet, RFC 1035
Section 4.1.2
perl v5.26.0 2017-07-31 Net::DNS::Question(3pm)
