[Summary view] [Print] [Text view]

   1  <?php
   2  /*
   3   * Limb PHP Framework
   4   *
   5   * @link http://limb-project.com 
   6   * @copyright  Copyright &copy; 2004-2007 BIT(http://bit-creative.com)
   7   * @license    LGPL http://www.gnu.org/copyleft/lesser.html 
   8   */
   9  
  10  /**

  11   * class lmbIp.

  12   *

  13   * @package net

  14   * @version $Id: lmbIp.class.php 5945 2007-06-06 08:31:43Z pachanga $

  15   */
  16  class lmbIp
  17  {
  18    function encodeIpRange($ip_begin, $ip_end)
  19    {
  20      // Returns ip adressess array with in range $ip_begin - $ip_end

  21      if ( !self::isValid($ip_begin) || !self::isValid($ip_end) )
  22      {
  23        throw new lmbException("Invalid IP range", array('start' => $ip_begin,
  24                                                          'end' => $ip_end));
  25      }
  26      $data = array
  27      (
  28        lmbIp :: encode($ip_begin),
  29        lmbIp :: encode($ip_end)
  30      );
  31      $start = hexdec(dechex($data[0]));
  32      $end = hexdec(dechex($data[1]));
  33      $ip_list = array();
  34      for ( $i=$start; $i<=$end; $i++ )
  35      {
  36        if ( ($i & 0x000000FF) == 0x000000FF )
  37        {
  38          // Checking for 0.0.0.255

  39          continue;
  40        }elseif ( ($i & 0x0000FF00) == 0x0000FF00 )
  41        {
  42          // Checking for 0.0.255.0

  43          $i += 0xFF;
  44          continue;
  45        }elseif ( ($i & 0x00FF0000) == 0x00FF0000 )
  46        {
  47          // Checking for 0.255.0.0

  48          $i += 0xFFFF;
  49          continue;
  50        }elseif ( ($i & 0xFFFFFF) == 0 && $end - $i >= 0xFFFFFF )
  51        {
  52          $ip_list[] = $i|0xFFFFFF;
  53          $i = hexdec(dechex($i|0xFFFFFF));
  54        }elseif ( ($i & 0xFFFF) == 0 && $end - $i >= 0xFFFF )
  55        {
  56          $ip_list[] = $i|0xFFFF;
  57          $i = hexdec(dechex($i|0xFFFF));
  58        }elseif ( ($i & 0xFF) == 0 && $end - $i >= 0xFF )
  59        {
  60          $ip_list[] = $i|0xFF;
  61          $i = hexdec(dechex($i|0xFF));
  62        }else{
  63          $ip_list[] = $i|0;
  64        }
  65      }
  66      return $ip_list;
  67    }
  68  
  69    function encode($ip)
  70    {
  71      // 1.2.3.4 -> 0x01020304 as int

  72      return ip2long($ip);
  73    }
  74  
  75    function decode($numeric_ip)
  76    {
  77      // 0x01020304 as int -> 1.2.3.4

  78      return long2ip($numeric_ip);
  79    }
  80  
  81    function isValid($ip)
  82    {
  83      return ip2long($ip) !== false;
  84    }
  85  }
  86  
  87  ?>