CFLib.org – Common Function Library Project

Description:
Checks to see if a specifid address (IP address or host name) is a multicast address (Class D). If the host name is invalid an exception will be throw, so <CFTRY>/<CFCATCH> should be used.

Return Values:
Returns a boolean.

Example:

<CFOUTPUT>
#IsMulticastAddress("#CGI.REMOTE_ADDR#")#
</CFOUTPUT>

Parameters:

Full UDF Source:

/**
 * Checks to see if a specifid address (IP address or host name) is a multicast address (Class D).
 * 
 * @param address      The address to check. 
 * @return Returns a boolean. 
 * @author Ben Forta (ben@forta.com) 
 * @version 1, December 19, 2001 
 */
function IsMulticastAddress(address) {
   // Variables
   var iaclass="";
   var addr="";
   
   // Init class
   iaclass=CreateObject("java", "java.net.InetAddress");

   // Get address
   addr=iaclass.getByName(address);

   // Is Multicast (Class D)?
   return addr.isMulticastAddress();
}