Net::DNS::RR::OPT(3pm)         User Contributed Perl Documentation         Net::DNS::RR::OPT(3pm)



NAME
       Net::DNS::RR::OPT - DNS OPT resource record

SYNOPSIS
           use Net::DNS;
           $opt = new Net::DNS::RR(
               type    => "OPT",
               flags   => 0x8000,      # extended flags
               rcode   => 0,           # extended RCODE
               size    => 1280,        # UDP payload size
               );

DESCRIPTION
       EDNS OPT pseudo resource record.

       The OPT record supports EDNS protocol extensions and is not intended to be created,
       accessed or modified directly by user applications.

       All access to EDNS features is performed indirectly by operations on the packet header.
       The underlying mechanism is entirely hidden from the user.

METHODS
       The available methods are those inherited from the base class augmented by the type-
       specific methods defined in this package.

       Use of undocumented package features or direct access to internal data structures is
       discouraged and could result in program termination or other unpredictable behaviour.

   version
           $version = $rr->version;
           $rr->version( $version );

       The version of EDNS used by this OPT record.

   size
               $size = $packet->edns->size;
               $more = $packet->edns->size(1280);

       size() advertises the maximum size (octets) of UDP packet that can be reassembled in the
       network stack of the originating host.

   rcode
               $extended_rcode   = $packet->header->rcode;
               $incomplete_rcode = $packet->edns->rcode;

       The 12 bit extended RCODE. The most significant 8 bits reside in the OPT record. The least
       significant 4 bits can only be obtained from the packet header.

   flags
               $edns_flags = $packet->edns->flags;

               $do = $packet->header->do;
               $packet->header->do(1);

       16 bit field containing EDNS extended header flags.

   Options
               @option = $packet->edns->options;

               $octets = $packet->edns->option($option_code);

               $packet->edns->option( NSID => 'value' );
               $packet->edns->option( 3    => 'value' );

       When called in a list context, options() returns a list of option codes found in the OPT
       record.

       When called with a single argument, option() returns the octet string corresponding to the
       specified option. The function value is undefined if the specified option is absent.

       Options can be changed by providing an argument list containing one or more (name =>
       value) pairs to be added or modified. The effect of such changes is cumulative. An option
       is deleted if the value is undefined.

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 prior written
       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.

       Portions Copyright (c)2012 Dick Franks.

       Package template (c)2009,2012 O.M.Kolkman and R.W.Franks.

SEE ALSO
       perl, Net::DNS, Net::DNS::RR, RFC6891, RFC3225



perl v5.20.2                                2014-10-29                     Net::DNS::RR::OPT(3pm)