169 lines
4.1 KiB
Perl
169 lines
4.1 KiB
Perl
package Net::DNS::RR::LP;
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use strict;
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use warnings;
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our $VERSION = (qw$Id: LP.pm 1896 2023-01-30 12:59:25Z willem $)[2];
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use base qw(Net::DNS::RR);
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=head1 NAME
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Net::DNS::RR::LP - DNS LP resource record
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=cut
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use integer;
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sub _decode_rdata { ## decode rdata from wire-format octet string
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my ( $self, $data, $offset ) = @_;
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$self->{preference} = unpack( "\@$offset n", $$data );
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$self->{target} = Net::DNS::DomainName->decode( $data, $offset + 2 );
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return;
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}
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sub _encode_rdata { ## encode rdata as wire-format octet string
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my $self = shift;
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my $target = $self->{target};
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return pack 'n a*', $self->preference, $target->encode();
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}
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sub _format_rdata { ## format rdata portion of RR string.
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my $self = shift;
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my $target = $self->{target};
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return join ' ', $self->preference, $target->string;
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}
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sub _parse_rdata { ## populate RR from rdata in argument list
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my ( $self, @argument ) = @_;
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for (qw(preference target)) { $self->$_( shift @argument ) }
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return;
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}
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sub preference {
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my ( $self, @value ) = @_;
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for (@value) { $self->{preference} = 0 + $_ }
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return $self->{preference} || 0;
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}
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sub target {
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my ( $self, @value ) = @_;
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for (@value) { $self->{target} = Net::DNS::DomainName->new($_) }
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return $self->{target} ? $self->{target}->name : undef;
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}
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sub FQDN { return shift->{target}->fqdn; }
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sub fqdn { return shift->{target}->fqdn; }
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my $function = sub { ## sort RRs in numerically ascending order.
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return $Net::DNS::a->{'preference'} <=> $Net::DNS::b->{'preference'};
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};
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__PACKAGE__->set_rrsort_func( 'preference', $function );
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__PACKAGE__->set_rrsort_func( 'default_sort', $function );
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1;
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__END__
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=head1 SYNOPSIS
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use Net::DNS;
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$rr = Net::DNS::RR->new('name IN LP preference FQDN');
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$rr = Net::DNS::RR->new(
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name => 'example.com',
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type => 'LP',
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preference => 10,
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target => 'target.example.com.'
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);
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=head1 DESCRIPTION
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Class for DNS Locator Pointer (LP) resource records.
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The LP DNS resource record (RR) is used to hold the name of a
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subnetwork for ILNP. The name is an FQDN which can then be used to
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look up L32 or L64 records. LP is, effectively, a Locator Pointer to
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L32 and/or L64 records.
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=head1 METHODS
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The available methods are those inherited from the base class augmented
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by the type-specific methods defined in this package.
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Use of undocumented package features or direct access to internal data
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structures is discouraged and could result in program termination or
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other unpredictable behaviour.
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=head2 preference
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$preference = $rr->preference;
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$rr->preference( $preference );
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A 16 bit unsigned integer in network byte order that indicates the
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relative preference for this LP record among other LP records
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associated with this owner name. Lower values are preferred over
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higher values.
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=head2 FQDN, fqdn
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=head2 target
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$target = $rr->target;
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$rr->target( $target );
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The FQDN field contains the DNS target name that is used to
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reference L32 and/or L64 records.
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=head1 COPYRIGHT
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Copyright (c)2012 Dick Franks.
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All rights reserved.
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Package template (c)2009,2012 O.M.Kolkman and R.W.Franks.
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=head1 LICENSE
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted, provided
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that the original copyright notices appear in all copies and that both
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copyright notice and this permission notice appear in supporting
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documentation, and that the name of the author not be used in advertising
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or publicity pertaining to distribution of the software without specific
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prior written permission.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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=head1 SEE ALSO
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L<perl> L<Net::DNS> L<Net::DNS::RR>
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L<RFC6742|https://tools.ietf.org/html/rfc6742>
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=cut
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