CFLib.org – Common Function Library Project

IPConvert(ip or numeric version)

Last updated August 28, 2003

author

Aaron Eisenberger

Version: 1 | Requires: CF5 | Library: NetLib

Description:
IPConvert converts valid IP addresses into integers and back again. This is useful for storing IP information in a database using the int datatype rather than char.

Return Values:
Returns either a number of an IP.

Example:

<cfset int=IPConvert(CGI.REMOTE_ADDR)>
<cfset ip=IPConvert(int)>
<cfoutput>
Converted to: #int#<br>
Converted back to: #ip#
</cfoutput>

Parameters:

Name Description Required
ip or numeric version IP or numeric version of IP. Yes

Full UDF Source:

/**
 * Converts IPs to integers and back for efficient database storage.
 * 
 * @param ip or numeric version 	 IP or numeric version of IP. (Required)
 * @return Returns either a number of an IP. 
 * @author Aaron Eisenberger (aaron@x-clothing.com) 
 * @version 1, August 28, 2003 
 */
function IPConvert(val) {
	var int = '';
	var ip = arraynew(1);
	if (find('.',val))
		{
		int = 0;
		int = ListGetAt(val, 1, ".") * 256^3;
		int = int + ListGetAt(val, 2, ".") * 256^2;
		int = int + ListGetAt(val, 3, ".") * 256;
		int = int + ListGetAt(val, 4, ".");
		return int;
		}
	else
		{
		int = val;
		ip[1] = Int(int / 256^3);
		int = int - (ip[1] * 256^3);
		ip[2] = int(int / 256^2);
		int = int - (ip[2] * 256^2);
		ip[3] = int(int / 256);
		ip[4] = int - (ip[3] * 256);
		ip = ip[1] & "." & ip[2] & "." & ip[3] & "." & ip[4];
		return ip;
		}
}
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