1: <?php
 2: 
 3: /**
 4:  * Class for blocking requests from blacklisted IP addresses
 5:  *
 6:  * @package alpha::util::filters
 7:  * @since 1.2
 8:  * @author John Collins <dev@alphaframework.org>
 9:  * @version $Id: IPBlacklistFilter.inc 1574 2012-10-23 14:06:12Z alphadevx $
10:  * @license http://www.opensource.org/licenses/bsd-license.php The BSD License
11:  * @copyright Copyright (c) 2012, John Collins (founder of Alpha Framework).
12:  * All rights reserved.
13:  *
14:  * <pre>
15:  * Redistribution and use in source and binary forms, with or
16:  * without modification, are permitted provided that the
17:  * following conditions are met:
18:  *
19:  * * Redistributions of source code must retain the above
20:  *   copyright notice, this list of conditions and the
21:  *   following disclaimer.
22:  * * Redistributions in binary form must reproduce the above
23:  *   copyright notice, this list of conditions and the
24:  *   following disclaimer in the documentation and/or other
25:  *   materials provided with the distribution.
26:  * * Neither the name of the Alpha Framework nor the names
27:  *   of its contributors may be used to endorse or promote
28:  *   products derived from this software without specific
29:  *   prior written permission.
30:  *
31:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
32:  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
33:  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
34:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
35:  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
36:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
37:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
38:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
39:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
41:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
42:  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
43:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44:  * </pre>
45:  *
46:  */
47: class IPBlacklistFilter implements AlphaFilterInterface {
48: 
49:     /**
50:      * Trace logger
51:      *
52:      * @var Logger
53:      * @since 1.2
54:      */
55:     private static $logger = null;
56: 
57:     /**
58:      * Constructor
59:      *
60:      * @since 1.2
61:      */
62:     public function __construct() {
63:         self::$logger = new Logger('IPBlacklistFilter');
64:     }
65: 
66:     /**
67:      * (non-PHPdoc)
68:      * @see alpha/util/filters/AlphaFilterInterface#process()
69:      *
70:      * @throws ResourceNotAllowedException
71:      */
72:     public function process() {
73: 
74:         $ip = $_SERVER['REMOTE_ADDR'];
75: 
76:         if(!empty($ip)) {
77:             $badIP = new BlacklistedIPObject();
78: 
79:             try {
80:                 $badIP->loadByAttribute('IP', $ip);
81:             }catch (BONotFoundException $bonf) {
82:                 // ip is not on the list!
83:                 return;
84:             }
85: 
86:             // if we got this far then the IP is bad
87:             self::$logger->warn('The IP ['.$ip.'] was blocked from accessing the resource ['.$_SERVER['REQUEST_URI'].']');
88:             throw new ResourceNotAllowedException('Not allowed!');
89:         }
90:     }
91: }
92: 
93: ?>