200 lines
4.1 KiB
Perl
200 lines
4.1 KiB
Perl
package Net::DNS::RR::CAA;
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use strict;
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use warnings;
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our $VERSION = (qw$Id: CAA.pm 1814 2020-10-14 21:49:16Z 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::CAA - DNS CAA 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 = shift;
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my ( $data, $offset ) = @_;
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my $limit = $offset + $self->{rdlength};
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$self->{flags} = unpack "\@$offset C", $$data;
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( $self->{tag}, $offset ) = Net::DNS::Text->decode( $data, $offset + 1 );
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$self->{value} = 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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return pack 'C a* a*', $self->flags, $self->{tag}->encode, $self->{value}->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 @rdata = ( $self->flags, $self->{tag}->string, $self->{value}->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 $self = shift;
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$self->flags(shift);
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$self->tag( lc shift );
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$self->value(shift);
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return;
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}
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sub _defaults { ## specify RR attribute default values
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my $self = shift;
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$self->flags(0);
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return;
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}
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sub flags {
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my $self = shift;
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$self->{flags} = 0 + shift if scalar @_;
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return $self->{flags} || 0;
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}
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sub critical {
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my $self = shift;
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if ( scalar @_ ) {
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for ( $self->{flags} ) {
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$_ = 0x0080 | ( $_ || 0 );
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$_ ^= 0x0080 unless shift;
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}
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}
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return 0x0080 & ( $self->{flags} || 0 );
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}
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sub tag {
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my $self = shift;
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$self->{tag} = Net::DNS::Text->new(shift) if scalar @_;
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return $self->{tag} ? $self->{tag}->value : undef;
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}
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sub value {
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my $self = shift;
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$self->{value} = Net::DNS::Text->new(shift) if scalar @_;
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return $self->{value} ? $self->{value}->value : undef;
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}
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1;
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__END__
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=head1 SYNOPSIS
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use Net::DNS;
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$rr = Net::DNS::RR->new('name IN CAA flags tag value');
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=head1 DESCRIPTION
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Class for Certification Authority Authorization (CAA) DNS 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 flags
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$flags = $rr->flags;
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$rr->flags( $flags );
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Unsigned 8-bit number representing Boolean flags.
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=over 4
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=item critical
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$rr->critical(1);
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if ( $rr->critical ) {
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...
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}
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Issuer critical flag.
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=back
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=head2 tag
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$tag = $rr->tag;
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$rr->tag( $tag );
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The property identifier, a sequence of ASCII characters.
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Tag values may contain ASCII characters a-z, hyphen and 0-9.
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Tag values should not contain any other characters.
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Matching of tag values is not case sensitive.
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=head2 value
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$value = $rr->value;
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$rr->value( $value );
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A sequence of octets representing the property value.
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Property values are encoded as binary values and may employ
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sub-formats.
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=head1 COPYRIGHT
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Copyright (c)2013,2015 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 above copyright notice appear in all copies and that both that
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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>, RFC8659
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=cut
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