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: ?>