CFLib.org – Common Function Library Project

IPAddress2IPDottedDecimal([ipAddress])

Last updated September 27, 2002

author

Jonathan Pickard

Version: 1 | Requires: CF5 | Library: NetLib

Description:
Use IPAddress2IPDottedDecimal to convert an IP address string to a decimal value. Storing decimal values in a database and making comparisons with them is more efficient than using IP address strings.

Return Values:
Returns a number.

Example:

<cfoutput>
#IPAddress2IPDottedDecimal( "192.168.0.7" )#
</cfoutput>

Parameters:

Name Description Required
ipAddress IP Address to convert. No

Full UDF Source:

/**
 * Converts an IP address to a 32-bit dotted decimal IP number.
 * 
 * @param ipAddress 	 IP Address to convert. (Optional)
 * @return Returns a number. 
 * @author Jonathan Pickard (j_pickard@hotmail.com) 
 * @version 1, September 27, 2002 
 */
function IPAddress2IPDottedDecimal( ipAddress ) {
	var	ipValue = 0;
	var lBitShifts = "24,16,8,0";
	var i = 1;

	if ( ListLen( ipAddress, "." ) EQ 4 )
	{
		for ( ; i LTE 4; i = i + 1 )
		{
			ipValue = ipValue + BitSHLN( ListGetAt( ipAddress, i, "." ), ListGetAt( lBitShifts, i ) );
		}
	}

	return ipValue;
}
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