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;
	   $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, RFC2671 Section 4

perl v5.18.2							    2014-01-16						      Net::DNS::RR::OPT(3)