add HexToOct()

diff --git a/includes/IP.php b/includes/IP.php
index 82445a4..9599cbd 100644 (file)
--- a/includes/IP.php
+++ b/includes/IP.php
@@ -150,6 +150,24 @@ class IP {
                $ip_oct = preg_replace( '/(^|:)0+' . RE_IPV6_WORD . '/', '$1$2', $ip_oct );
                return $ip_oct;
        }
+       
+       /**
+        * Given an unsigned integer, returns an IPv6 address in octet notation
+        * @param $ip integer IP address.
+        * @return string
+        */
+       public static function HextoOctet( $ip_hex ) {
+               // Convert to padded uppercase hex
+               $ip_hex = str_pad( strtoupper($ip_hex), 32, '0');
+               // Seperate into 8 octets
+               $ip_oct = substr( $ip_hex, 0, 4 );
+               for ($n=1; $n < 8; $n++) {
+                       $ip_oct .= ':' . substr($ip_hex, 4*$n, 4);
+               }
+               // NO leading zeroes
+               $ip_oct = preg_replace( '/(^|:)0+' . RE_IPV6_WORD . '/', '$1$2', $ip_oct );
+               return $ip_oct;
+       }
 
        /**
         * Convert a network specification in IPv6 CIDR notation to an integer network and a number of bits