NAME

       Net::DNS::RR::OPT - DNS OPT

SYNOPSIS

       "use Net::DNS::RR";

DESCRIPTION

       Class for EDNS pseudo resource record OPT.

METHODS

       This object should only be used inside the Net::DNS classes itself.

   new
       Since "OPT" is a pseudo record and should not be stored in masterfiles; Therefore we have
       not implemented a method to create this RR from string.

       One may create the object from a hash. See RFC 2671 for details for the meaning of the
       hash keys.

        $rr= Net::DNS::RR->new (
           name => "",                # Ignored and set to ""
           type => "OPT",
           class => 1024,             # sets UDP payload size
           extendedrcode =>  0x00,    # sets the extended RCODE 1 octets
           ednsflags     =>  0x0000,  # sets the ednsflags (2octets)
           optioncode   =>   0x0,     # 2 octets
           optiondata   =>   0x0      # optionlength octets
        );

       The ednsversion is set to 0 for now. The ttl value is determined from the extendedrcode,
       the ednsversion and the ednsflag.  The rdata is constructed from the optioncode and
       optiondata see section 4.4 of RFC 2671

       If optioncode is left undefined then we do not expect any RDATA.

       The defaults are no rdata.

   do, set_do, clear_do
           $opt->set_do;

       Reads, sets and clears the do flag. (first bit in the ednssflags);

   size
           $opt->size(1498);
           print "Packet size:". $opt->size() ;

       Sets or gets the packet size.

TODO

       - This class is tailored to use with dnssec.

       - Do some range checking on the input.

       - This class probably needs subclasses once OPTION codes start to be defined.

       - look at use of extended labels

COPYRIGHT

       Copyright (c) 2001, 2002  RIPE NCC.  Author Olaf M. Kolkman

       All Rights Reserved

       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, written prior
       permission.

       THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED
       WARRANTIES OF MERCHANTABILITY AND FITNESS; IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY
       SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
       OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
       ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

       Based on, and contains, code by Copyright (c) 1997-2002 Michael Fuhr.

SEE ALSO

       perl(1), Net::DNS, Net::DNS::Resolver, Net::DNS::Packet, Net::DNS::Header,
       Net::DNS::Question, Net::DNS::RR, RFC 2435 Section 3