1: <?php
 2: /*****************************************************************************************
 3:  * X2Engine Open Source Edition is a customer relationship management program developed by
 4:  * X2Engine, Inc. Copyright (C) 2011-2016 X2Engine Inc.
 5:  * 
 6:  * This program is free software; you can redistribute it and/or modify it under
 7:  * the terms of the GNU Affero General Public License version 3 as published by the
 8:  * Free Software Foundation with the addition of the following permission added
 9:  * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
10:  * IN WHICH THE COPYRIGHT IS OWNED BY X2ENGINE, X2ENGINE DISCLAIMS THE WARRANTY
11:  * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
12:  * 
13:  * This program is distributed in the hope that it will be useful, but WITHOUT
14:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15:  * FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
16:  * details.
17:  * 
18:  * You should have received a copy of the GNU Affero General Public License along with
19:  * this program; if not, see http://www.gnu.org/licenses or write to the Free
20:  * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21:  * 02110-1301 USA.
22:  * 
23:  * You can contact X2Engine, Inc. P.O. Box 66752, Scotts Valley,
24:  * California 95067, USA. or at email address contact@x2engine.com.
25:  * 
26:  * The interactive user interfaces in modified source and object code versions
27:  * of this program must display Appropriate Legal Notices, as required under
28:  * Section 5 of the GNU Affero General Public License version 3.
29:  * 
30:  * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
31:  * these Appropriate Legal Notices must retain the display of the "Powered by
32:  * X2Engine" logo. If the display of the logo is not reasonably feasible for
33:  * technical reasons, the Appropriate Legal Notices must display the words
34:  * "Powered by X2Engine".
35:  *****************************************************************************************/
36: 
37: /**
38:  * X2IPAddress helper component for useful IP address methods
39:  */
40: 
41: class X2IPAddress {
42:     /**
43:      * Convert a network using wildcard notation (192.168.1.*) to CIDR
44:      * @param string $network The network IP address
45:      * @return string The network address in CIDR notation, or NULL if it cannot be converted
46:      */
47:     public static function wildcardToCidr($network) {
48:         $cidrNetwork = array();
49:         $octets = explode('.', $network);
50:         $prefix = 0;
51:         foreach ($octets as $octet) {
52:             if ($octet === '*') {
53:                 $cidrNetwork = array_pad ($cidrNetwork, 4, '0');
54:                 $cidrNetwork = implode('.', $cidrNetwork);
55:                 $cidrNetwork .= "/${prefix}";
56:                 return $cidrNetwork;
57:             } else {
58:                 $cidrNetwork[] = $octet;
59:             }
60:             $prefix += 8;
61:             if ($prefix > 32)
62:                 break;
63:         }
64:     }
65: 
66:     /**
67:      * @param string $network The network IP address, in CIDR notation
68:      * @param string $host The host IP address
69:      */
70:     public static function subnetContainsIp($network, $host) {
71:         list($subnet, $prefix) = explode('/', $network);
72: 
73:         // Convert addresses to decimal
74:         $subnetLong = ip2long($subnet);
75:         $hostLong = ip2long($host);
76: 
77:         // Now calculate the subnet the host belongs to, given the prefix that we know
78:         $hostsSubnet = $hostLong & ~((1 << (32 - $prefix)) - 1);
79: 
80:         // Return whether the subnets match
81:         return $hostsSubnet === $subnetLong;
82:     }
83: }
84: ?>
85: