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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Validate
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @see Zend_Validate_Abstract
  */
 // require_once 'Zend/Validate/Abstract.php';
 
 /**
  * @category   Zend
  * @package    Zend_Validate
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Validate_Ip extends Zend_Validate_Abstract
 {
     const INVALID        = 'ipInvalid';
     const NOT_IP_ADDRESS = 'notIpAddress';
 
     /**
      * @var array
      */
     protected $_messageTemplates = array(
         self::INVALID        => "Invalid type given. String expected",
         self::NOT_IP_ADDRESS => "'%value%' does not appear to be a valid IP address",
     );
 
     /**
      * internal options
      *
      * @var array
      */
     protected $_options = array(
         'allowipv6' => true,
         'allowipv4' => true
     );
 
     /**
      * Sets validator options
      *
      * @param array $options OPTIONAL Options to set, see the manual for all available options
      */
     public function __construct($options = array())
     {
         if ($options instanceof Zend_Config) {
             $options = $options->toArray();
         } else if (!is_array($options)) {
             $options = func_get_args();
             $temp['allowipv6'] = array_shift($options);
             if (!empty($options)) {
                 $temp['allowipv4'] = array_shift($options);
             }
 
             $options = $temp;
         }
 
         $options += $this->_options;
         $this->setOptions($options);
     }
 
     /**
      * Returns all set options
      *
      * @return array
      */
     public function getOptions()
     {
         return $this->_options;
     }
 
     /**
      * Sets the options for this validator
      *
      * @param array $options
      * @throws Zend_Validate_Exception
      * @return Zend_Validate_Ip
      */
     public function setOptions($options)
     {
         if (array_key_exists('allowipv6', $options)) {
             $this->_options['allowipv6'] = (boolean) $options['allowipv6'];
         }
 
         if (array_key_exists('allowipv4', $options)) {
             $this->_options['allowipv4'] = (boolean) $options['allowipv4'];
         }
 
         if (!$this->_options['allowipv4'] && !$this->_options['allowipv6']) {
             // require_once 'Zend/Validate/Exception.php';
             throw new Zend_Validate_Exception('Nothing to validate. Check your options');
         }
 
         return $this;
     }
 
     /**
      * Defined by Zend_Validate_Interface
      *
      * Returns true if and only if $value is a valid IP address
      *
      * @param  mixed $value
      * @return boolean
      */
     public function isValid($value)
     {
         if (!is_string($value)) {
             $this->_error(self::INVALID);
             return false;
         }
 
         $this->_setValue($value);
         if (($this->_options['allowipv4'] && !$this->_options['allowipv6'] && !$this->_validateIPv4($value)) ||
             (!$this->_options['allowipv4'] && $this->_options['allowipv6'] && !$this->_validateIPv6($value)) ||
             ($this->_options['allowipv4'] && $this->_options['allowipv6'] && !$this->_validateIPv4($value) && !$this->_validateIPv6($value))) {
             $this->_error(self::NOT_IP_ADDRESS);
             return false;
         }
 
         return true;
     }
 
     /**
      * Validates an IPv4 address
      *
      * @param string $value
      * @return bool
      */
     protected function _validateIPv4($value) {
         $ip2long = ip2long($value);
         if($ip2long === false) {
             return false;
         }
 
         return $value == long2ip($ip2long);
     }
 
     /**
      * Validates an IPv6 address
      *
      * @param  string $value Value to check against
      * @return boolean True when $value is a valid ipv6 address
      *                 False otherwise
      */
     protected function _validateIPv6($value) {
         if (strlen($value) < 3) {
             return $value == '::';
         }
 
         if (strpos($value, '.')) {
             $lastcolon = strrpos($value, ':');
             if (!($lastcolon && $this->_validateIPv4(substr($value, $lastcolon + 1)))) {
                 return false;
             }
 
             $value = substr($value, 0, $lastcolon) . ':0:0';
         }
 
         if (strpos($value, '::') === false) {
             return preg_match('/\A(?:[a-f0-9]{1,4}:){7}[a-f0-9]{1,4}\z/i', $value);
         }
 
         $colonCount = substr_count($value, ':');
         if ($colonCount < 8) {
             return preg_match('/\A(?::|(?:[a-f0-9]{1,4}:)+):(?:(?:[a-f0-9]{1,4}:)*[a-f0-9]{1,4})?\z/i', $value);
         }
 
         // special case with ending or starting double colon
         if ($colonCount == 8) {
             return preg_match('/\A(?:::)?(?:[a-f0-9]{1,4}:){6}[a-f0-9]{1,4}(?:::)?\z/i', $value);
         }
 
         return false;
     }
 }