*
* static int numToInt(String $numeric)
* returns the integer value, the numeric represents
+ *
+ * static String parseIP(String $numeric)
+ * parses an IP Address in numeric format
+ *
+ * static String numericFromIP(String $ip)
+ * builds a numeric representing the IP
*/
class Numerics {
return $int;
}
+ public static function parseIP($numeric, $shortForm = true) {
+ if(strlen($numeric) == 6) { //IPv4
+ $value = self::numToInt($numeric);
+ $ip = array();
+ $ip[0] = ($value & 0xff000000) >> 24;
+ $ip[1] = ($value & 0x00ff0000) >> 16;
+ $ip[2] = ($value & 0x0000ff00) >> 8;
+ $ip[3] = ($value & 0x000000ff);
+ return implode(".", $ip);
+ } else { //IPv6
+ $ip = array();
+ for($i = 0; $i < strlen($numeric);) {
+ if($numeric[$i] == "_") {
+ if($shortForm) {
+ $ip[] = ""; //::
+ } else {
+ $rightBlocks = (strlen($numeric) - ($i + 1)) / 3;
+ $skipCount = 8 - count($ip) - $rightBlocks;
+ for($j = 0; $j < $skipBlocks; $j++) {
+ $ip[] = "0";
+ }
+ }
+ $i++;
+ } else {
+ $value = self::numToInt($numeric[$i].$numeric[$i+1].$numeric[$i+2]);
+ $ip[] = dechex($value);
+ $i += 3;
+ }
+ }
+ return implode(":", $ip);
+ }
+ }
+
+ public static function numericFromIP($ip) {
+ $pattern = array();
+ $pattern['ipv6'] = '/^((([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}:[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){5}:([0-9A-Fa-f]{1,4}:)?[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){4}:([0-9A-Fa-f]{1,4}:){0,2}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){3}:([0-9A-Fa-f]{1,4}:){0,3}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){2}:([0-9A-Fa-f]{1,4}:){0,4}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(([0-9A-Fa-f]{1,4}:){0,5}:((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(::([0-9A-Fa-f]{1,4}:){0,5}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|([0-9A-Fa-f]{1,4}::([0-9A-Fa-f]{1,4}:){0,5}[0-9A-Fa-f]{1,4})|(::([0-9A-Fa-f]{1,4}:){0,6}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){1,7}:))(|\/[0-9]{1,3})$/';
+ $pattern['ipv4'] = '/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}(|\/[0-9]{1,2})$/';
+ if(preg_match($pattern['ipv4'], $ip)) {
+ //thats quite simple here
+ $ip = explode(".", $ip);
+ $ipValue = intval($ip[3]);
+ $ipValue <<= 8;
+ $ipValue |= intval($ip[2]);
+ $ipValue <<= 8;
+ $ipValue |= intval($ip[1]);
+ $ipValue <<= 8;
+ $ipValue |= intval($ip[0]);
+ $ip = self::intToNum($ipValue,6);
+ } else if(preg_match($pattern['ipv6'], $ip)) {
+ //thats a little bit complicated :D (we may only have one _)
+ $ipv6 = array();
+ $ip = explode(":",$ip);
+ $last_zero = false; $zero_sequence = 0; $biggest_zero_sequence = 0; $max_start = -1;
+ foreach($ip as $i => $v) {
+ if($v == "") {
+ $skipBlocks = (8 - count($ip));
+ for($j = 0; $j < $skipBlocks; $j++) {
+ $ipv6[$i+$j] = "_";
+ }
+ $max_start = $i;
+ $biggest_zero_sequence = $skipBlocks;
+ } else {
+ $value = hexdec($v);
+ if($value == 0) {
+ $ipv6[$i] = "_";
+ if($last_zero) {
+ $zero_sequence++;
+ } else {
+ $last_zero = true;
+ $zero_sequence = 1;
+ }
+ if($zero_sequence > $biggest_zero_sequence) {
+ $biggest_zero_sequence = $zero_sequence;
+ $max_start = $i-($zero_sequence-1);
+ }
+ } else {
+ $ipv6[$i] = self::intToNum($value,3);
+ $last_zero = false;
+ }
+ }
+ }
+ $ip = "";
+ for($i = 0; $i < 8; $i++) {
+ if($i == $max_start) { //merge the biggest sequence of _'s
+ $ip .= "_";
+ $i += ($biggest_zero_sequence-1);
+ } elseif($ipv6[$i] == "_") {
+ $ip .= "AAA";
+ } else {
+ $ip .= $ipv6[$i];
+ }
+ }
+ return $ip;
+ } else {
+ $ip = "AAAAAA";
+ }
+ return $ip;
+ }
+
}
?>
\ No newline at end of file