NAME

       Net::DNS::RR::NSEC - DNS NSEC resource record

SYNOPSIS

           use Net::DNS;
           $rr = Net::DNS::RR->new( 'name NSEC nxtdname typelist' );

DESCRIPTION

       Class for DNSSEC NSEC resource records.

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.

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

       The Next Domain field contains the next owner name (in the canonical ordering of the zone)
       that has authoritative data or contains a delegation point NS RRset.

   typelist
           @typelist = $rr->typelist;
           $typelist = $rr->typelist;

       typelist() identifies the RRset types that exist at the NSEC RR owner name.  When called
       in scalar context, the list is interpolated into a string.

   typemap
           $exists = $rr->typemap($rrtype);

       typemap() returns a Boolean true value if the specified RRtype occurs in the type bitmap
       of the NSEC record.

   match
           $matched = $rr->match( 'example.foo' );

       match() returns a Boolean true value if the canonical form of the name argument matches
       the canonical owner name of the NSEC RR.

   covers
           $covered = $rr->covers( 'example.foo' );

       covers() returns a Boolean true value if the canonical form of the name, or one of its
       ancestors, falls between the owner name and the nxtdname field of the NSEC record.

   encloser, nextcloser, wildcard
           $encloser = $rr->encloser( 'example.foo' );
           print "encloser: $encloser\n" if $encloser;

       encloser() returns the name of a provable encloser of the query name argument obtained
       from the NSEC RR.

       nextcloser() returns the next closer name, which is one label longer than the closest
       encloser.  This is only valid after encloser() has returned a valid domain name.

       wildcard() returns the unexpanded wildcard name from which the next closer name was
       possibly synthesised.  This is only valid after encloser() has returned a valid domain
       name.

COPYRIGHT

       Copyright (c)2001-2005 RIPE NCC.  Author Olaf M. Kolkman

       Portions Copyright (c)2018-2019 Dick Franks

       All rights reserved.

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

LICENSE

       Permission to use, copy, modify, and distribute this software and its documentation for
       any purpose and without fee is hereby granted, provided that the original copyright
       notices appear in all copies and that both 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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
       INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
       PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
       FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
       OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
       DEALINGS IN THE SOFTWARE.

SEE ALSO

       perl, Net::DNS, Net::DNS::RR, RFC4034, RFC9077