Prototype for network address verification. This function should work with existing verification code using regular expression. For example, this function will try to calculate numbers even if an octet is bigger than 255.

verify_net_addr.js

function verify_address(cidr_addr) {
        var parts = cidr_addr.split("/");
        var ip = parts[0];
        var prefix = parts[1];

        var mask = 0xffffffff;
        var ip_parts = ip.split('.');
        var ip_hex = (((((((+ip_parts[0])*256)+(+ip_parts[1]))*256)+(+ip_parts[2]))*256)+(+ip_parts[3])) >>> 0;
        var prefix_hex = (~(mask >>> prefix)) >>> 0;
        var net_addr = (ip_hex & prefix_hex) >>> 0;

        print("[debug] ip:" + ip + "\n")
        print("[debug] ip_binary:" + ip_hex.toString(2) + "\n")
        print("[debug] prefix:" + prefix + "\n")
        print("[debug] prefix_binary:" + prefix_hex.toString(2) + "\n")
        print("[debug] net_addr_binary:" + net_addr.toString(2) + "\n")

        if (ip_hex == net_addr) {
                return true
        }
        else {
                return false
        }
}

function main() {
        test_addr = "192.168.3.128/25";
        print(verify_address(test_addr));
}