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package Net::DNS::RR::ISDN;
#
# $Id: ISDN.pm 388 2005-06-22 10:06:05Z olaf $
#
use strict;
BEGIN { 
    eval { require bytes; }
} 
use vars qw(@ISA $VERSION);

@ISA     = qw(Net::DNS::RR);
$VERSION = (qw$LastChangedRevision: 388 $)[1];

sub new {
	my ($class, $self, $data, $offset) = @_;

	if ($self->{"rdlength"} > 0) {
		my ($address, $sa, $len);

		($len) = unpack("\@$offset C", $$data);
		++$offset;
		$address = substr($$data, $offset, $len);
		$offset += $len;

		if ($len + 1 < $self->{"rdlength"}) {
			($len) = unpack("\@$offset C", $$data);
			++$offset;
			$sa = substr($$data, $offset, $len);
			$offset += $len;
		}
		else {
			$sa = "";
		}

		$self->{"address"} = $address;
		$self->{"sa"}  = $sa;
	}

	return bless $self, $class;
}

sub new_from_string {
	my ($class, $self, $string) = @_;

	if ($string && $string =~ /^['"](.*?)['"](.*)/s) {
		$self->{"address"} = $1;
		my $rest = $2;

		if ($rest =~ /^\s+['"](.*?)['"]$/) {
			$self->{"sa"} = $1;
		}
		else {
			$self->{"sa"} = "";
		}
	}

	return bless $self, $class;
}

sub rdatastr {
	my $self = shift;

	return $self->{"address"}
	       ? qq("$self->{address}" "$self->{sa}")
	       : '';
}

sub rr_rdata {
	my $self = shift;
	my $rdata = "";

	if (exists $self->{"address"}) {
		$rdata .= pack("C", length $self->{"address"});
		$rdata .= $self->{"address"};

		if ($self->{"sa"}) {
			$rdata .= pack("C", length $self->{"sa"});
			$rdata .= $self->{"sa"};
		}
	}

	return $rdata;
}

1;
__END__

=head1 NAME

Net::DNS::RR::ISDN - DNS ISDN resource record

=head1 SYNOPSIS

C<use Net::DNS::RR>;

=head1 DESCRIPTION

Class for DNS ISDN resource records.

=head1 METHODS

=head2 address

    print "address = ", $rr->address, "\n";

Returns the RR's address field.

=head2 sa

    print "subaddress = ", $rr->sa, "\n";

Returns the RR's subaddress field.

=head1 COPYRIGHT

Copyright (c) 1997-2002 Michael Fuhr. 

Portions Copyright (c) 2002-2004 Chris Reinhardt.

All rights reserved.  This program is free software; you may redistribute
it and/or modify it under the same terms as Perl itself.

=head1 SEE ALSO

L<perl(1)>, L<Net::DNS>, L<Net::DNS::Resolver>, L<Net::DNS::Packet>,
L<Net::DNS::Header>, L<Net::DNS::Question>, L<Net::DNS::RR>,
RFC 1183 Section 3.2

=cut