PAL.C.T MINI SHELL
package Net::DNS::RR::AAAA;
#
# $Id: AAAA.pm 795 2009-01-26 17:28:44Z olaf $
#
use strict;
BEGIN {
eval { require bytes; }
}
use vars qw(@ISA $VERSION);
@ISA = qw(Net::DNS::RR);
$VERSION = (qw$LastChangedRevision: 795 $)[1];
sub new {
my ($class, $self, $data, $offset) = @_;
if ($self->{"rdlength"} > 0) {
my @addr = unpack("\@$offset n8", $$data);
$self->{"address"} = sprintf("%x:%x:%x:%x:%x:%x:%x:%x", @addr);
}
return bless $self, $class;
}
sub new_from_string {
my ($class, $self, $string) = @_;
$self->{"address"}=$string if $string;
bless $self, $class;
return $self->_normalize_AAAA();
}
sub rdatastr {
my $self = shift;
return $self->{"address"} || '';
}
sub rr_rdata {
my $self = shift;
my $rdata = "";
if (exists $self->{"address"}) {
$self->_normalize_AAAA();
my @addr = split(/:/, $self->{"address"});
$rdata .= pack("n8", map { hex $_ } @addr);
}
return $rdata;
}
sub _normalize_AAAA {
my $self=shift();
return $self unless exists $self->{"address"};
return $self->{"address"} if $self->{normalized};
my $string=$self->{"address"};
if ($string) {
my @addr;
# IPv4 mapped
# I think this is correct, per RFC 1884 Sections 2.2 & 2.4.4.
if ($string =~ /^(.*):(\d+)\.(\d+)\.(\d+)\.(\d+)$/) {
my ($front, $a, $b, $c, $d) = ($1, $2, $3, $4, $5);
$string = $front . sprintf(":%x:%x",
($a << 8 | $b),
($c << 8 | $d));
}elsif($string =~ /^(.*)::(.*)$/) {
my ($front, $back) = ($1, $2);
my @front = split(/:/, $front);
my @back = split(/:/, $back);
my $fill = 8 - (@front ? $#front + 1 : 0)
- (@back ? $#back + 1 : 0);
my @middle = (0) x $fill;
@addr = (@front, @middle, @back);
}
else {
@addr = split(/:/, $string);
if (@addr < 8) {
@addr = ((0) x (8 - @addr), @addr);
}
}
$self->{"address"} = sprintf("%x:%x:%x:%x:%x:%x:%x:%x",
map { hex $_ } @addr);
}
$self->{"normalized"}=1;
return $self;
}
1;
__END__
=head1 NAME
Net::DNS::RR::AAAA - DNS AAAA resource record
=head1 SYNOPSIS
C<use Net::DNS::RR>;
=head1 DESCRIPTION
Class for DNS IPv6 Address (AAAA) resource records.
=head1 METHODS
=head2 address
print "address = ", $rr->address, "\n";
Returns the RR's address field.
=head1 BUGS
The C<string> method returns only the preferred method of address
representation ("x:x:x:x:x:x:x:x", as documented in RFC 1884,
Section 2.2, Para 1).
=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 1886 Section 2, RFC 1884 Sections 2.2 & 2.4.4
=cut
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