Net::DNS::RR::OPT(3) User Contributed Perl Documentation Net::DNS::RR::OPT(3)NAMENet::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 v5.18.1 2012-12-28 Net::DNS::RR::OPT(3)
