phpman > perldoc > Net::DNS::Question

NAME
    Net::DNS::Question - DNS question record

SYNOPSIS
        use Net::DNS::Question;

        $question = Net::DNS::Question->new('example.com', 'AAAA', 'IN');

DESCRIPTION
    A Net::DNS::Question object represents a record in the question section of a DNS packet.

METHODS
  new
        $question = Net::DNS::Question->new('example.com', 'AAAA', 'IN');
        $question = Net::DNS::Question->new('example.com', 'A', 'IN');
        $question = Net::DNS::Question->new('example.com');

        $question = Net::DNS::Question->new('2001::DB8::dead:beef', 'PTR', 'IN');
        $question = Net::DNS::Question->new('2001::DB8::dead:beef');

    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 = Net::DNS::Question->decode(\$data, $offset);

        ($question, $offset) = Net::DNS::Question->decode(\$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.

  string
        print "string = ", $question->string, "\n";

    Returns a string representation of the question record.

  print
        $object->print;

    Prints the record to the standard output. Calls the string() method to get the string
    representation.

  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 = Net::DNS::Packet->new( $example, 'SOA' );
        $reply = $resolver->send($query) or die;
        ($question) = $reply->question;
        $name = $question->name;

  qname, zname
        $qname = $question->qname;
        $zname = $question->zname;

    Fully qualified domain name in the form required for a query 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 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::DomainName, Net::DNS::Packet, RFC 1035 Section 4.1.2