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.\" ========================================================================
.\"
.IX Title "Net::DNS::Question 3pm"
.TH Net::DNS::Question 3pm "2009-12-30" "perl v5.14.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Net::DNS::Question \- DNS question class
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\f(CW\*(C`use Net::DNS::Question\*(C'\fR
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
A \f(CW\*(C`Net::DNS::Question\*(C'\fR object represents a record in the
question section of a \s-1DNS\s0 packet.
.SH "METHODS"
.IX Header "METHODS"
.SS "new"
.IX Subsection "new"
.Vb 1
\&    $question = Net::DNS::Question\->new("example.com", "MX", "IN");
.Ve
.PP
Creates a question object from the domain, type, and class passed
as arguments.
.PP
\&\s-1RFC4291\s0 and \s-1RFC4632\s0 \s-1IP\s0 address/prefix notation is supported for
queries in in\-addr.arpa and ip6.arpa subdomains.
.SS "parse"
.IX Subsection "parse"
.Vb 1
\&    ($question, $offset) = Net::DNS::Question\->parse(\e$data, $offset);
.Ve
.PP
Parses a question section record at the specified location within a \s-1DNS\s0 packet.
The first argument is a reference to the packet data.
The second argument is the offset within the packet where the question record begins.
.PP
Returns a Net::DNS::Question object and the offset of the next location in the packet.
.PP
Parsing is aborted if the question object cannot be created (e.g., corrupt or insufficient data).
.SS "qname, zname"
.IX Subsection "qname, zname"
.Vb 2
\&    print "qname = ", $question\->qname, "\en";
\&    print "zname = ", $question\->zname, "\en";
.Ve
.PP
Returns the domain name.  In dynamic update packets, this field is
known as \f(CW\*(C`zname\*(C'\fR and refers to the zone name.
.SS "qtype, ztype"
.IX Subsection "qtype, ztype"
.Vb 2
\&    print "qtype = ", $question\->qtype, "\en";
\&    print "ztype = ", $question\->ztype, "\en";
.Ve
.PP
Returns the record type.  In dymamic update packets, this field is
known as \f(CW\*(C`ztype\*(C'\fR and refers to the zone type (must be \s-1SOA\s0).
.SS "qclass, zclass"
.IX Subsection "qclass, zclass"
.Vb 2
\&    print "qclass = ", $question\->qclass, "\en";
\&    print "zclass = ", $question\->zclass, "\en";
.Ve
.PP
Returns the record class.  In dynamic update packets, this field is
known as \f(CW\*(C`zclass\*(C'\fR and refers to the zone's class.
.SS "print"
.IX Subsection "print"
.Vb 1
\&    $question\->print;
.Ve
.PP
Prints the question record on the standard output.
.SS "string"
.IX Subsection "string"
.Vb 1
\&    print $qr\->string, "\en";
.Ve
.PP
Returns a string representation of the question record.
.SS "data"
.IX Subsection "data"
.Vb 1
\&    $qdata = $question\->data($packet, $offset);
.Ve
.PP
Returns the question record in binary format suitable for inclusion
in a \s-1DNS\s0 packet.
.PP
Arguments are a \f(CW\*(C`Net::DNS::Packet\*(C'\fR object and the offset within
that packet's data where the \f(CW\*(C`Net::DNS::Question\*(C'\fR record is to
be stored.  This information is necessary for using compressed
domain names.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (c) 1997\-2002 Michael Fuhr.
.PP
Portions Copyright (c) 2002\-2004 Chris Reinhardt.
.PP
Portions Copyright (c) 2003,2006\-2009 Dick Franks.
.PP
All rights reserved.
.PP
This program is free software; you may redistribute it and/or
modify it under the same terms as Perl itself.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIperl\fR\|(1), Net::DNS, Net::DNS::Resolver, Net::DNS::Packet,
Net::DNS::Update, Net::DNS::Header, Net::DNS::RR,
\&\s-1RFC\s0 1035 Section 4.1.2