vRealize Orchestrator Workflow Script to Evaluate if IP Address is in CIDR

I was doing some validation of input in a vRealize Automation Service Broker Catalog item form, One of the validation is to check if a IP address is inside a specific CIDR.

The inputs are:

• cidr : string
• ipAddress: string

The Output is:

• validIp : boolean

the script looks like this:

function u(n) { return n >>> 0; } 

var m = cidr.match(/\d+/g);
var addr32 = m.slice(0, 4).reduce(function (a, o) {return u(+a << 8) + +o;});
var mask = u(~0 << (32 - +m[4]));
var start = u(addr32 & mask); // 198.162.1.0
var end = u(addr32 | ~mask);  // 198.162.1.255

var m2 = ipAddress.match(/\d+/g);
var ipAddr32 = m2.slice(0, 4).reduce(function (a, o) {return u(+a << 8) + +o;});

if (ipAddr32 > start && ipAddr32 < end) {
    validIp = true;
} else {
    validIp = false;
}