vRO_convertToCIDRNotation.js

vRO_convertToCIDRNotation.js

/**
 *
 * @module com.mayank.goyal
 * @version 4.0.0
 *
 * @param {string} gatewayIP 192.10.21.0
 * @param {string} subnetmaskIP 255.255.255.192
 *
 * @outputType string 192.10.21.0/26
 *
 */
function convertToCIDRNotation(gatewayIP,subnetMaskIP){
	    this.start = gatewayIP;
	    this.subnetMask = subnetMaskIP;
	    this.cidrMask = function(){
	        mask = this.subnetMask.split(".");
	        if(mask.length != 4){
	            throw("Precondition failed: subnet mask should only have four octets!");
	        }
	        
	        bits = 0;
	        for(var i = 0; i < mask.length; i += 1){
	            octet = parseInt(mask[i]);
	            if(octet > 255 || octet < 0){
	                throw("Precondition failed: octet out of range!");
	            }
	            while(octet > 0){
	                bits += octet % 2;
	                octet = octet >> 1;
	            }
	        }
	        
	        if(bits > 32){
	            throw("Postcondition failed: Too many bits!");
	        }
	        return bits;
	    }.bind(this);
	};
	
cidrIp = new convertToCIDRNotation("192.168.1.0","255.255.255.192");
return (cidrIp.start + "/" + cidrIp.cidrMask());