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

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;
       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.
       Portions Copyright (c)2012 Dick Franks.
       Package template (c)2009,2012 O.M.Kolkman and R.W.Franks.
       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.
SEE ALSO
       perl, Net::DNS, Net::DNS::RR, RFC2671 Section 4

perl v5.16.3                      2012-12-28              Net::DNS::RR::OPT(3)