added isLocalAddress method to IPAddr.class.php to check for local addresses (RFC1918...

[PHP-P10.git] / Uplink / IPAddr.class.php

diff --git a/Uplink/IPAddr.class.php b/Uplink/IPAddr.class.php
index 737cb9a7cf6cf42968215f1b639838f8d66e6389..2370cf66e48fab506177595eec9a74ad9edd3611 100644 (file)
--- a/Uplink/IPAddr.class.php
+++ b/Uplink/IPAddr.class.php
@@ -1,12 +1,12 @@
 <?php
 /******************************* PHP-P10 v2 *****************************
- * Copyright (C) 2011  Philipp Kreil (pk910)                            *
+ * Copyright (C) 2011-2012  Philipp Kreil (pk910)                       *
  *                                                                      *
  * This program is free software: you can redistribute it and/or modify *
  * it under the terms of the GNU General Public License as published by *
  * the Free Software Foundation, either version 3 of the License, or    *
  * (at your option) any later version.                                  *
- *                                                                      * 
+ *                                                                      *
  * This program is distributed in the hope that it will be useful,      *
  * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
@@ -16,7 +16,7 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>. *
  *                                                                      *
  ************************************************************************
- * 
+ *
  *  Uplink/IpAddr.class.php
  *
  * This class represents an IPv4 or IPv6 address.
@@ -28,7 +28,7 @@ class IPAddr {
        private static $pattern_IPv4 = '/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}(|\/[0-9]{1,2})$/';
        private $ip6 = array();
        private $addr_is_ipv6 = false;
-       
+
        public function __construct($initial_value) {
                for($i = 0; $i < 8; $i++) {
                        $this->ip6[$i] = 0;
@@ -43,7 +43,7 @@ class IPAddr {
                        $this->parseNumeric($initial_value);
                }
        }
-       
+
        public function parseNumeric($numeric) {
                if(strlen($numeric) == 6) { //IPv4
                        $value = Numerics::numToInt($numeric);
@@ -67,7 +67,7 @@ class IPAddr {
                        $this->addr_is_ipv6 = true;
                }
        }
-       
+
        public function parseIPv6($ipv6) {
                if(substr($ipv6,0,2) == "::") $ipv6 = substr($ipv6, 1);
                if(substr($ipv6,-2) == "::") $ipv6 = substr($ipv6, 0, -1);
@@ -83,7 +83,7 @@ class IPAddr {
                }
                $this->addr_is_ipv6 = true;
        }
-       
+
        public function parseIPv4($ipv4) {
                $ipv4blocks = explode(".",$ipv4);
                $this->ip6[6] = intval($ipv4blocks[0]) << 8;
@@ -92,19 +92,47 @@ class IPAddr {
                $this->ip6[7] |= intval($ipv4blocks[3]);
                $this->addr_is_ipv6 = false;
        }
-       
+
        public function isIPv6() {
                return $this->addr_is_ipv6;
        }
        
+       public function isLocalAddress() {
+               /* checks if address is out of:
+               * 127.0.0.1/32
+               * 10.0.0.0/8
+               * 192.168.0.0/16
+               * 172.16.0.0/12
+               * ::1/128
+               * fc00::/7
+               */
+               if($this->addr_is_ipv6) {
+                       if(
+                               (($this->ip6[0] & 0xFE00) == 0xFC00) || /* fc00::/7 */
+                               ($this->ip6[0] == 0 && $this->ip6[1] == 0 && $this->ip6[2] == 0 && $this->ip6[3] == 0 && 
+                                $this->ip6[4] == 0 && $this->ip6[5] == 0 && $this->ip6[6] == 0 && $this->ip6[7] == 1)
+                         )
+                               return true;
+               } else {
+                       if(
+                               (($this->ip6[6] & 0xFFFF) == 0x7F00 && ($this->ip6[7] & 0xFFFF) == 0x0001) || /* 127.0.0.1/32 */
+                               (($this->ip6[6] & 0xFF00) == 0x0A00) || /* 10.0.0.0/8 */
+                               (($this->ip6[6] & 0xFFF0) == 0xAC10) || /* 172.16.0.0/12 */
+                               (($this->ip6[6] & 0xFFFF) == 0xC0A8) /* 192.168.0.0/16 */
+                         )
+                               return true;
+               }
+               return false;
+       }
+
        public function getAddress() {
-               if($this->isIPv6()) {   
+               if($this->isIPv6()) {
                        $max_start = 0;
                        $max_zeros = 0;
                        $curr_zeros = 0;
                        for ($i = 0; $i < 8; $i++) {
                                if ($this->ip6[$i] == 0)
-                                       $curr_zeros++;
+                               $curr_zeros++;
                                else if ($curr_zeros > $max_zeros) {
                                        $max_start = $i - $curr_zeros;
                                        $max_zeros = $curr_zeros;
@@ -135,15 +163,15 @@ class IPAddr {
                        return implode(".", $ipv4);
                }
        }
-       
+
        public function getNumeric() {
-               if($this->isIPv6()) {   
+               if($this->isIPv6()) {
                        $max_start = 0;
                        $max_zeros = 0;
                        $curr_zeros = 0;
                        for ($i = 0; $i < 8; $i++) {
                                if ($this->ip6[$i] == 0)
-                                       $curr_zeros++;
+                               $curr_zeros++;
                                else if ($curr_zeros > $max_zeros) {
                                        $max_start = $i - $curr_zeros;
                                        $max_zeros = $curr_zeros;
@@ -171,7 +199,7 @@ class IPAddr {
                        return $ipv4[0].$ipv4[1];
                }
        }
-       
+
 }
 
 ?>
\ No newline at end of file