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<?php |
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/** |
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* Phossa Project |
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* |
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* PHP version 5.4 |
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* |
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* @category Library |
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* @package Phossa2\Session |
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* @copyright Copyright (c) 2016 phossa.com |
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* @license http://mit-license.org/ MIT License |
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* @link http://www.phossa.com/ |
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*/ |
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/*# declare(strict_types=1); */ |
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namespace Phossa2\Session\Validator; |
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use Phossa2\Shared\Base\ObjectAbstract; |
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use Phossa2\Session\Interfaces\ValidatorInterface; |
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/** |
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* RemoteIp |
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* |
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* Check remote ip is allowed or not |
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* |
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* @package Phossa2\package |
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* @author Hong Zhang <[email protected]> |
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* @see ObjectAbstract |
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* @see ValidatorInterface |
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* @version 2.1.0 |
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* @since 2.1.0 added |
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*/ |
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class RemoteIp extends ObjectAbstract implements ValidatorInterface |
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{ |
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/** |
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* Allowed ip patterns |
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* |
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* @var array |
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* @access protected |
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*/ |
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protected $allowed; |
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/** |
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* Denied ip patterns |
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* |
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* @var array |
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* @access protected |
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*/ |
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protected $denied; |
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/** |
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* Inject allowed or denied ip patterns like '216.110.124.0/24' etc. |
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* |
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* @param array $denied |
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* @param array $allowed |
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* @access protected |
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*/ |
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public function __construct(array $denied = [], array $allowed = []) |
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{ |
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$this->setAllowed($allowed)->setDenied($denied); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function validate()/*# : bool */ |
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{ |
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$ip = $_SERVER['REMOTE_ADDR']; |
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// allowed ? |
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if ($this->matchIp($ip, $this->allowed)) { |
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return true; |
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} |
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// blocked ? |
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if ($this->matchIp($ip, $this->denied)) { |
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return false; |
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} |
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return empty($this->allowed) ? true : false; |
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} |
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/** |
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* Set allowed patterns |
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* |
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* @param array $patterns |
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* @return $this |
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* @access public |
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*/ |
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public function setAllowed(array $patterns) |
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{ |
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$this->allowed = $this->processPattern($patterns); |
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return $this; |
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} |
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/** |
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* Set denied patterns |
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* |
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* @param array $patterns |
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* @return $this |
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* @access public |
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*/ |
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public function setDenied(array $patterns) |
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{ |
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$this->denied = $this->processPattern($patterns); |
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return $this; |
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} |
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/** |
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* Match ip with patterns |
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* |
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* @param string $ip |
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* @param array $patterns |
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* @return boolean |
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* @access protected |
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*/ |
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protected function matchIp(/*# string */ $ip, array $patterns)/*# : bool */ |
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{ |
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$num = ip2long($ip); |
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foreach ($patterns as $pat) { |
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if (($num & $pat[1]) == $pat[0]) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Pre-process ip matching pattern |
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* |
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* @param array $patterns |
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* @return array |
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* @access protected |
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*/ |
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protected function processPattern(array $patterns)/*# : array */ |
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{ |
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$result = []; |
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foreach ($patterns as $pat) { |
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$part = explode('/', $pat); |
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$addr = ip2long($part[0]); |
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$mask = isset($part[1]) ? ((int) $part[1]) : 32; |
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// fix |
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$mask = $this->getMask($mask); |
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$addr = $addr & $mask; |
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$result[] = [$addr, $mask]; |
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} |
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return $result; |
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} |
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/** |
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* Convert mask length to mask in decimal |
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* |
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* @param int $length |
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* @return int |
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* @access protected |
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*/ |
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protected function getMask(/*# int */ $length = 32)/*# : int */ |
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{ |
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$bin = substr(str_repeat('1', $length) . str_repeat('0', 32), 0, 32); |
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return ip2long(long2ip(bindec($bin))); |
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} |
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} |
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phossa2 /
session
