use Net::DNS; $opt = new Net::DNS::RR( type => "OPT", flags => 0x8000, # extended flags rcode => 0, # extended RCODE size => 1280, # UDP payload size );
The OPT record supports EDNS protocol extensions and is not intended to be created, accessed or modified directly by user applications.
$version = $rr->version; $rr->version( $version );
$size = $packet->edns->size; $more = $packet->edns->size(1280);
$extended_rcode = $packet->header->rcode; $incomplete_rcode = $packet->edns->rcode;
$edns_flags = $packet->edns->flags; $do = $packet->header->do; $packet->header->do(1);
@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.
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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.