177 lines
4.3 KiB
Perl
177 lines
4.3 KiB
Perl
package Net::DNS::RR::URI;
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use strict;
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use warnings;
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our $VERSION = (qw$Id: URI.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::URI - DNS URI resource record
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=cut
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use integer;
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use Net::DNS::Text;
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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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my $limit = $offset + $self->{rdlength};
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@{$self}{qw(priority weight)} = unpack( "\@$offset n2", $$data );
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$offset += 4;
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$self->{target} = Net::DNS::Text->decode( $data, $offset, $limit - $offset );
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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 = $self->{target};
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return pack 'n2 a*', @{$self}{qw(priority weight)}, $target->raw;
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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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my @rdata = ( $self->priority, $self->weight, $target->string );
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return @rdata;
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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(priority weight target)) { $self->$_( shift @argument ) }
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return;
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}
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sub priority {
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my ( $self, @value ) = @_;
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for (@value) { $self->{priority} = 0 + $_ }
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return $self->{priority} || 0;
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}
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sub weight {
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my ( $self, @value ) = @_;
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for (@value) { $self->{weight} = 0 + $_ }
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return $self->{weight} || 0;
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}
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sub target {
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my ( $self, @value ) = @_;
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for (@value) { $self->{target} = Net::DNS::Text->new($_) }
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return $self->{target} ? $self->{target}->value : undef;
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}
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# order RRs by numerically increasing priority, decreasing weight
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my $function = sub {
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my ( $a, $b ) = ( $Net::DNS::a, $Net::DNS::b );
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return $a->{priority} <=> $b->{priority}
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|| $b->{weight} <=> $a->{weight};
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};
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__PACKAGE__->set_rrsort_func( 'priority', $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 URI priority weight target');
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=head1 DESCRIPTION
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Class for DNS Service (URI) resource 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 priority
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$priority = $rr->priority;
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$rr->priority( $priority );
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The priority of the target URI in this RR.
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The range of this number is 0-65535.
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A client MUST attempt to contact the URI with the lowest-numbered
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priority it can reach; weighted selection being used to distribute
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load across targets with equal priority.
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=head2 weight
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$weight = $rr->weight;
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$rr->weight( $weight );
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A server selection mechanism. The weight field specifies a relative
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weight for entries with the same priority. Larger weights SHOULD be
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given a proportionately higher probability of being selected. The
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range of this number is 0-65535.
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=head2 target
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$target = $rr->target;
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$rr->target( $target );
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The URI of the target. Resolution of the URI is according to the
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definitions for the Scheme of the URI.
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=head1 COPYRIGHT
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Copyright (c)2015 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<RFC7553|https://tools.ietf.org/html/rfc7553>
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=cut
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