# Copyright (c) 2011 bivio Software, Inc.  All Rights Reserved.
#
# Visit http://www.bivio.biz for more info.
# 
# This library is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of the
# License, or (at your option) any later version.
# 
# This library is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
# 
# You should have received a copy of the GNU Lesser General Public
# License along with this library;  If not, you may get a copy from:
# http://www.opensource.org/licenses/lgpl-license.html
# 
# $Id: IPAddress.pm,v 1.2 2011/11/05 23:50:31 nagler Exp $
package Bivio::Type::IPAddress;
use strict;
use Bivio::Base 'Type.SyntacticString';

our($VERSION) = sprintf('%d.%02d', q$Revision: 1.2 $ =~ /\d+/g);

sub REGEX {
    return qr{(?:\d{1,3}\.){3}\d{1,3}}i;
}

sub from_domain {
    my($proto, $host) = @_;
    return $proto->from_inet(
	(gethostbyname($host))[4] || b_die($host, ': gethostbyname: ', "$!"));
}

sub from_inet {
    my(undef, $inet_addr) = @_;
    return join('.', unpack('C4', $inet_addr));
}

sub get_min_width {
    return 7;
}

sub get_width {
    return 15;
}

sub to_inet {
    my(undef, $value) = @_;
    return pack('C4', split(/\./, $value));
}

sub unsafe_to_domain {
    my($proto, $value) = @_;
    return (gethostbyaddr($proto->to_inet($value), Socket::AF_INET()))[0] || undef;
}

1;