     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: ?>