PHP/IPAddr.class.php

   1 <?php
   2 /* IPAddr.class.php - IPv4/IPv6 Address Class
   3  * Copyright (C) 2011-2013  Philipp Kreil (pk910)
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 class IPAddr {
  20         private static $pattern_IPv6 = '/^((([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}:[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){5}:([0-9A-Fa-f]{1,4}:)?[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){4}:([0-9A-Fa-f]{1,4}:){0,2}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){3}:([0-9A-Fa-f]{1,4}:){0,3}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){2}:([0-9A-Fa-f]{1,4}:){0,4}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(([0-9A-Fa-f]{1,4}:){0,5}:((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(::([0-9A-Fa-f]{1,4}:){0,5}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|([0-9A-Fa-f]{1,4}::([0-9A-Fa-f]{1,4}:){0,5}[0-9A-Fa-f]{1,4})|(::([0-9A-Fa-f]{1,4}:){0,6}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){1,7}:))(|\/[0-9]{1,3})$/';
  21         private static $pattern_IPv4 = '/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}(|\/[0-9]{1,2})$/';
  22         private $ip6 = array();
  23         private $addr_is_ipv6 = false;
  24
  25         public function __construct($parse_ip) {
  26                 for($i = 0; $i < 8; $i++)
  27                         $this->ip6[$i] = 0;
  28
  29                 if($parse_ip == null) {
  30                         //nothing
  31                 } elseif(preg_match(self::$pattern_IPv6, $parse_ip)) {
  32                         $this->parseIPv6($parse_ip);
  33                 } elseif(preg_match(self::$pattern_IPv4, $parse_ip)) {
  34                         $this->parseIPv4($parse_ip);
  35                 }
  36         }
  37
  38         public function parseIPv6($ipv6) {
  39                 if(substr($ipv6,0,2) == "::") $ipv6 = substr($ipv6, 1);
  40                 if(substr($ipv6,-2) == "::") $ipv6 = substr($ipv6, 0, -1);
  41                 $ipv6blocks = explode(":", $ipv6);
  42                 $j = 0;
  43                 foreach($ipv6blocks as $i => $block) {
  44                         if($block == "") {
  45                                 $skipBlocks = 8 - count($ipv6blocks);
  46                                 $j += $skipBlocks + 1;
  47                         } else if(strpos($block, '.')) { //ipv4 mapped
  48                                 $this->parseIPv4($block);
  49                                 return;
  50                         } else {
  51                                 $this->ip6[$j++] = hexdec($block);
  52                         }
  53                 }
  54                 $this->addr_is_ipv6 = true;
  55         }
  56
  57         public function parseIPv4($ipv4) {
  58                 $ipv4blocks = explode(".",$ipv4);
  59                 $this->ip6[6] = intval($ipv4blocks[0]) << 8;
  60                 $this->ip6[6] |= intval($ipv4blocks[1]);
  61                 $this->ip6[7] = intval($ipv4blocks[2]) << 8;
  62                 $this->ip6[7] |= intval($ipv4blocks[3]);
  63                 $this->addr_is_ipv6 = false;
  64         }
  65
  66         public function isIPv6() {
  67                 return $this->addr_is_ipv6;
  68         }
  69
  70         public function isLocalAddress() {
  71                 /* checks if address is out of:
  72                 * 127.0.0.1/32
  73                 * 10.0.0.0/8
  74                 * 192.168.0.0/16
  75                 * 172.16.0.0/12
  76                 * ::1/128
  77                 * fc00::/7
  78                 */
  79                 if($this->addr_is_ipv6) {
  80                         if(
  81                                 (($this->ip6[0] & 0xFE00) == 0xFC00) || /* fc00::/7 */
  82                                 ($this->ip6[0] == 0 && $this->ip6[1] == 0 && $this->ip6[2] == 0 && $this->ip6[3] == 0 &&
  83                                  $this->ip6[4] == 0 && $this->ip6[5] == 0 && $this->ip6[6] == 0 && $this->ip6[7] == 1)
  84                           )
  85                                 return true;
  86                 } else {
  87                         if(
  88                                 (($this->ip6[6] & 0xFFFF) == 0x7F00 && ($this->ip6[7] & 0xFFFF) == 0x0001) || /* 127.0.0.1/32 */
  89                                 (($this->ip6[6] & 0xFF00) == 0x0A00) || /* 10.0.0.0/8 */
  90                                 (($this->ip6[6] & 0xFFF0) == 0xAC10) || /* 172.16.0.0/12 */
  91                                 (($this->ip6[6] & 0xFFFF) == 0xC0A8) /* 192.168.0.0/16 */
  92                           )
  93                                 return true;
  94                 }
  95                 return false;
  96         }
  97
  98         public function getAddress($options = array()) {
  99                 $shorten_ipv6 = (isset($options['shorten_ipv6']) ? $options['shorten_ipv6'] : true);
 100                 $ipv4_mapped = (isset($options['ipv4_mapped']) ? $options['ipv4_mapped'] : true);
 101                 if($this->isIPv6()) {
 102                         $max_start = 0;
 103                         $max_zeros = 0;
 104                         $curr_zeros = 0;
 105                         if($shorten_ipv6) {
 106                                 for ($i = 0; $i < 8; $i++) {
 107                                         if ($this->ip6[$i] == 0)
 108                                         $curr_zeros++;
 109                                         else if ($curr_zeros > $max_zeros) {
 110                                                 $max_start = $i - $curr_zeros;
 111                                                 $max_zeros = $curr_zeros;
 112                                                 $curr_zeros = 0;
 113                                         }
 114                                 }
 115                                 if ($curr_zeros > $max_zeros) {
 116                                         $max_start = $i - $curr_zeros;
 117                                         $max_zeros = $curr_zeros;
 118                                 }
 119                         }
 120                         $ipv6 = "";
 121                         for($i = 0; $i < 8; $i++) {
 122                                 if($max_zeros > 1 && $i == $max_start) {
 123                                         $ipv6 .= "::";
 124                                         $i += $max_zeros - 1;
 125                                 } else {
 126                                         if($ipv6 != "") $ipv6 .= ":";
 127                                         $hex = dechex($this->ip6[$i]);
 128                                         if(!$shorten_ipv6) {
 129                                                 while(strlen($hex) < 4)
 130                                                         $hex = '0'.$hex;
 131                                         }
 132                                         $ipv6 .= $hex;
 133                                 }
 134                         }
 135                         return $ipv6;
 136                 } else {
 137                         $ipv4 = array();
 138                         $ipv4[0] = ($this->ip6[6] >> 8) & 0xff;
 139                         $ipv4[1] = ($this->ip6[6]) & 0xff;
 140                         $ipv4[2] = ($this->ip6[7] >> 8) & 0xff;
 141                         $ipv4[3] = ($this->ip6[7]) & 0xff;
 142                         $ipv4 = implode(".", $ipv4);
 143                         if($ipv4_mapped)
 144                                 $ipv4 = '::ffff:'.$ipv4;
 145                         return $ipv4;
 146                 }
 147         }
 148
 149         public function ipMatches($ip) {
 150                 if(!is_a($ip, __CLASS__)) {
 151                         $class = __CLASS__;
 152                         $ip = new $class($ip);
 153                 }
 154                 if(!$ip)
 155                         return false;
 156                 if($this->addr_is_ipv6 xor $ip->addr_is_ipv6)
 157                         return false;
 158                 $i = ($this->addr_is_ipv6 ? 0 : 6);
 159                 for(;$i < 8; $i++) {
 160                         if($this->ip6[$i] != $ip->ip6[$i])
 161                                 return false;
 162                 }
 163                 return true;
 164         }
 165
 166 }
 167
 168 ?>