Uplink/IPAddr.class.php

   1 <?php
   2 /******************************* PHP-P10 v2 *****************************
   3  * Copyright (C) 2011-2012  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  *
  20  *  Uplink/IpAddr.class.php
  21  *
  22  * This class represents an IPv4 or IPv6 address.
  23  *
  24  */
  25
  26 class IPAddr {
  27         private static $pattern_IPv6 = '/^((([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}:[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){5}:([0-9A-Fa-f]{1,4}:)?[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){4}:([0-9A-Fa-f]{1,4}:){0,2}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){3}:([0-9A-Fa-f]{1,4}:){0,3}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){2}:([0-9A-Fa-f]{1,4}:){0,4}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(([0-9A-Fa-f]{1,4}:){0,5}:((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(::([0-9A-Fa-f]{1,4}:){0,5}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|([0-9A-Fa-f]{1,4}::([0-9A-Fa-f]{1,4}:){0,5}[0-9A-Fa-f]{1,4})|(::([0-9A-Fa-f]{1,4}:){0,6}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){1,7}:))(|\/[0-9]{1,3})$/';
  28         private static $pattern_IPv4 = '/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}(|\/[0-9]{1,2})$/';
  29         private $ip6 = array();
  30         private $addr_is_ipv6 = false;
  31         private $is_server_addr = false;
  32
  33         public function __construct($initial_value) {
  34                 for($i = 0; $i < 8; $i++) {
  35                         $this->ip6[$i] = 0;
  36                 }
  37                 if($initial_value == null) {
  38                         //nothing
  39                 } elseif(preg_match(self::$pattern_IPv6, $initial_value)) {
  40                         $this->parseIPv6($initial_value);
  41                 } elseif(preg_match(self::$pattern_IPv4, $initial_value)) {
  42                         $this->parseIPv4($initial_value);
  43                 } else {
  44                         $this->parseNumeric($initial_value);
  45                 }
  46         }
  47
  48         public function parseNumeric($numeric) {
  49                 if(strlen($numeric) == 6) { //IPv4
  50                         $value = Numerics::numToInt($numeric);
  51                         $this->ip6[6] = ($value & 0xffff0000) >> 16;
  52                         $this->ip6[7] = ($value & 0x0000ffff);
  53                         $this->addr_is_ipv6 = false;
  54                 } else { //IPv6
  55                         $j = 0;
  56                         for($i = 0; $i < strlen($numeric);) {
  57                                 if($numeric[$i] == "_") {
  58                                         $rightBlocks = (strlen($numeric) - $i - 1) / 3;
  59                                         $skipBlocks = 8 - $j - $rightBlocks;
  60                                         $j += $skipBlocks;
  61                                         $i++;
  62                                 } else {
  63                                         $value = Numerics::numToInt($numeric[$i].$numeric[$i+1].$numeric[$i+2]);
  64                                         $this->ip6[$j++] = dechex($value);
  65                                         $i += 3;
  66                                 }
  67                         }
  68                         $this->addr_is_ipv6 = true;
  69                 }
  70         }
  71
  72         public function parseIPv6($ipv6) {
  73                 if(substr($ipv6,0,2) == "::") $ipv6 = substr($ipv6, 1);
  74                 if(substr($ipv6,-2) == "::") $ipv6 = substr($ipv6, 0, -1);
  75                 $ipv6blocks = explode(":", $ipv6);
  76                 $j = 0;
  77                 foreach($ipv6blocks as $i => $block) {
  78                         if($block == "") {
  79                                 $skipBlocks = 8 - count($ipv6blocks);
  80                                 $j += $skipBlocks + 1;
  81                         } else {
  82                                 $this->ip6[$j++] = hexdec($block);
  83                         }
  84                 }
  85                 $this->addr_is_ipv6 = true;
  86         }
  87
  88         public function parseIPv4($ipv4) {
  89                 $ipv4blocks = explode(".",$ipv4);
  90                 $this->ip6[6] = intval($ipv4blocks[0]) << 8;
  91                 $this->ip6[6] |= intval($ipv4blocks[1]);
  92                 $this->ip6[7] = intval($ipv4blocks[2]) << 8;
  93                 $this->ip6[7] |= intval($ipv4blocks[3]);
  94                 $this->addr_is_ipv6 = false;
  95         }
  96
  97         public function isIPv6() {
  98                 return $this->addr_is_ipv6;
  99         }
 100
 101         public function setServerAddr($serverAddr) {
 102                 $this->is_server_addr = $serverAddr;
 103         }
 104
 105         public function isServerAddr() {
 106                 return $this->is_server_addr;
 107         }
 108
 109         public function isLocalAddress($serverAddr = false) {
 110                 /* checks if address is out of:
 111                 * 127.0.0.1/32
 112                 * 10.0.0.0/8
 113                 * 192.168.0.0/16
 114                 * 172.16.0.0/12
 115                 * ::1/128
 116                 * fc00::/7
 117                 *
 118                 * if $serverAddr is true also return true for server IP's
 119                 */
 120                 if($this->addr_is_ipv6) {
 121                         if(
 122                                 (($this->ip6[0] & 0xFE00) == 0xFC00) || /* fc00::/7 */
 123                                 ($this->ip6[0] == 0 && $this->ip6[1] == 0 && $this->ip6[2] == 0 && $this->ip6[3] == 0 &&
 124                                  $this->ip6[4] == 0 && $this->ip6[5] == 0 && $this->ip6[6] == 0 && $this->ip6[7] == 1)
 125                           )
 126                                 return true;
 127                 } else {
 128                         if(
 129                                 (($this->ip6[6] & 0xFFFF) == 0x7F00 && ($this->ip6[7] & 0xFFFF) == 0x0001) || /* 127.0.0.1/32 */
 130                                 (($this->ip6[6] & 0xFF00) == 0x0A00) || /* 10.0.0.0/8 */
 131                                 (($this->ip6[6] & 0xFFF0) == 0xAC10) || /* 172.16.0.0/12 */
 132                                 (($this->ip6[6] & 0xFFFF) == 0xC0A8) /* 192.168.0.0/16 */
 133                           )
 134                                 return true;
 135                 }
 136                 if($serverAddr && $this->is_server_addr)
 137                         return true;
 138                 return false;
 139         }
 140
 141         public function getAddress() {
 142                 if($this->isIPv6()) {
 143                         $max_start = 0;
 144                         $max_zeros = 0;
 145                         $curr_zeros = 0;
 146                         for ($i = 0; $i < 8; $i++) {
 147                                 if ($this->ip6[$i] == 0)
 148                                 $curr_zeros++;
 149                                 else if ($curr_zeros > $max_zeros) {
 150                                         $max_start = $i - $curr_zeros;
 151                                         $max_zeros = $curr_zeros;
 152                                         $curr_zeros = 0;
 153                                 }
 154                         }
 155                         if ($curr_zeros > $max_zeros) {
 156                                 $max_start = $i - $curr_zeros;
 157                                 $max_zeros = $curr_zeros;
 158                         }
 159                         $ipv6 = "";
 160                         for($i = 0; $i < 8; $i++) {
 161                                 if($max_zeros > 1 && $i == $max_start) {
 162                                         $ipv6 .= "::";
 163                                         $i += $max_zeros - 1;
 164                                 } else {
 165                                         if($ipv6 != "") $ipv6 .= ":";
 166                                         $ipv6 .= dechex($this->ip6[$i]);
 167                                 }
 168                         }
 169                         return $ipv6;
 170                 } else {
 171                         $ipv4 = array();
 172                         $ipv4[0] = ($this->ip6[6] >> 8) & 0xff;
 173                         $ipv4[1] = ($this->ip6[6]) & 0xff;
 174                         $ipv4[2] = ($this->ip6[7] >> 8) & 0xff;
 175                         $ipv4[3] = ($this->ip6[7]) & 0xff;
 176                         return implode(".", $ipv4);
 177                 }
 178         }
 179
 180         public function getNumeric() {
 181                 if($this->isIPv6()) {
 182                         $max_start = 0;
 183                         $max_zeros = 0;
 184                         $curr_zeros = 0;
 185                         for ($i = 0; $i < 8; $i++) {
 186                                 if ($this->ip6[$i] == 0)
 187                                 $curr_zeros++;
 188                                 else if ($curr_zeros > $max_zeros) {
 189                                         $max_start = $i - $curr_zeros;
 190                                         $max_zeros = $curr_zeros;
 191                                         $curr_zeros = 0;
 192                                 }
 193                         }
 194                         if ($curr_zeros > $max_zeros) {
 195                                 $max_start = $i - $curr_zeros;
 196                                 $max_zeros = $curr_zeros;
 197                         }
 198                         $ipv6 = "";
 199                         for($i = 0; $i < 8; $i++) {
 200                                 if($max_zeros > 0 && $i == $max_start) {
 201                                         $ipv6 .= "_";
 202                                         $i += $max_zeros - 1;
 203                                 } else {
 204                                         $ipv6 .= Numerics::intToNum($this->ip6[$i],3);
 205                                 }
 206                         }
 207                         return $ipv6;
 208                 } else {
 209                         $ipv4 = array();
 210                         $ipv4[0] = Numerics::intToNum($this->ip6[6], 3);
 211                         $ipv4[1] = Numerics::intToNum($this->ip6[7], 3);
 212                         return $ipv4[0].$ipv4[1];
 213                 }
 214         }
 215
 216 }
 217
 218 ?>