net::dns::question(3) [osx man page]

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

NAME

       Net::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.

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

       Returns the question name attribute.  In dynamic update packets, this attribute is known as zname() and refers to the zone name.

   qtype, ztype
	   $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
	   $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.

   print
	   $object->print;

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

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

       Returns a string representation of the question record.

COPYRIGHT

       Copyright (c)1997-2002 Michael Fuhr.

       Portions Copyright (c)2002-2004 Chris Reinhardt.

       Portions Copyright (c)2003,2006-2011 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, Net::DNS, Net::DNS::DomainName, Net::DNS::Packet, RFC 1035 Section 4.1.2

perl v5.16.2							    2012-01-27						     Net::DNS::Question(3)

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

NAME

       Net::DNS::Header - DNS packet header class

SYNOPSIS

       "use Net::DNS::Header;"

DESCRIPTION

       A "Net::DNS::Header" object represents the header portion of a DNS packet.

METHODS

       new

	   $header = Net::DNS::Header->new;
	   $header = Net::DNS::Header->new($data);

       Without an argument, "new" creates a header object appropriate for making a DNS query.

       If "new" is passed a reference to a scalar containing DNS packet data, it creates a header object from that data.

       Returns undef if unable to create a header object (e.g., if the data is incomplete).

       print

	   $header->print;

       Dumps the header data to the standard output.

       string

	   print $header->string;

       Returns a string representation of the header object.

       id

	   print "query id = ", $header->id, "
";
	   $header->id(1234);

       Gets or sets the query identification number.

       qr

	   print "query response flag = ", $header->qr, "
";
	   $header->qr(0);

       Gets or sets the query response flag.

       opcode

	   print "query opcode = ", $header->opcode, "
";
	   $header->opcode("UPDATE");

       Gets or sets the query opcode (the purpose of the query).

       aa

	   print "answer is ", $header->aa ? "" : "non-", "authoritative
";
	   $header->aa(0);

       Gets or sets the authoritative answer flag.

       tc

	   print "packet is ", $header->tc ? "" : "not ", "truncated
";
	   $header->tc(0);

       Gets or sets the truncated packet flag.

       rd

	   print "recursion was ", $header->rd ? "" : "not ", "desired
";
	   $header->rd(0);

       Gets or sets the recursion desired flag.

       cd

	   print "checking was ", $header->cd ? "not" : "", "desired
";
	   $header->cd(0);

       Gets or sets the checking disabled flag.

       ra

	   print "recursion is ", $header->ra ? "" : "not ", "available
";
	   $header->ra(0);

       Gets or sets the recursion available flag.

       rcode

	   print "query response code = ", $header->rcode, "
";
	   $header->rcode("SERVFAIL");

       Gets or sets the query response code (the status of the query).

       qdcount, zocount

	   print "# of question records: ", $header->qdcount, "
";
	   $header->qdcount(2);

       Gets or sets the number of records in the question section of the packet.  In dynamic update packets, this field is known as "zocount" and
       refers to the number of RRs in the zone section.

       ancount, prcount

	   print "# of answer records: ", $header->ancount, "
";
	   $header->ancount(5);

       Gets or sets the number of records in the answer section of the packet.	In dynamic update packets, this field is known as "prcount" and
       refers to the number of RRs in the prerequisite section.

       nscount, upcount

	   print "# of authority records: ", $header->nscount, "
";
	   $header->nscount(2);

       Gets or sets the number of records in the authority section of the packet.  In dynamic update packets, this field is known as "upcount" and
       refers to the number of RRs in the update section.

       arcount, adcount

	   print "# of additional records: ", $header->arcount, "
";
	   $header->arcount(3);

       Gets or sets the number of records in the additional section of the packet.  In dynamic update packets, this field is known as "adcount".

       data

	   $hdata = $header->data;

       Returns the header data in binary format, appropriate for use in a DNS query packet.

COPYRIGHT

       Copyright (c) 1997-2000 Michael Fuhr.  All rights reserved.  This program is free software; you can redistribute it and/or modify it under
       the same terms as Perl itself.

SEE ALSO

       perl(1), Net::DNS, Net::DNS::Resolver, Net::DNS::Packet, Net::DNS::Update, Net::DNS::Question, Net::DNS::RR, RFC 1035 Section 4.1.1

perl v5.8.0							    2002-10-12						       Net::DNS::Header(3)