DNSChanger Detector Applet

import java.applet.Applet;
import java.awt.*;
import sun.net.dns.* ;
import java.util.* ;
import java.lang.* ;
import java.net.InetAddress ;
import java.security.* ;

public class DNSChangerDetector extends Applet {

    public java.util.List nsList ;
    public String infected = "FALSE" ;

    boolean ready = false ;

    String[] fromIP = { "85.255.112.0", "67.210.0.0", "93.188.60.0", "77.67.83.0", "213.109.64.0", "64.28.176.0" } ;
    String[] toIP = { "85.255.127.255", "67.210.15.255", "93.188.167.255", "77.67.83.255", "213.109.79.255", "64.28.191.255" } ;

    public static long ipToLong(InetAddress ip) {

        byte[] octets = ip.getAddress();

        long result = 0;

        for (int i = 0; i < octets.length; i++) {

            result |= octets[i] & 0xff;

            if (i < octets.length - 1) {
                result <<= 8;
            }

        }

        return result;

    }

    public String isReady() {
       if (ready) { return("TRUE"); } else { return("FALSE"); }
    }

    public String getEntries() {
        return(nsList.toString()) ;
    }

    public String isInfected() {
        return(infected) ;
    }


    public void init() {

        nsList = AccessController.doPrivileged(new PrivilegedAction<java.util.List>() {

            boolean found = false ;

            public java.util.List run() {

                try {

                    ResolverConfiguration rc = sun.net.dns.ResolverConfiguration.open() ;

                    java.util.List ns = rc.nameservers() ;

                    System.err.println("DNS Servers") ;
                    System.err.println(ns) ;

                    for (Object dns : ns) {

                        for (int i=0; i<6; i++) {

                            System.err.println("Checking if " + dns + " is in [" + fromIP[i] + "-" + toIP[i] + "]" );

                            long ipLo = ipToLong(InetAddress.getByName(fromIP[i]));
                            long ipHi = ipToLong(InetAddress.getByName(toIP[i]));
                            long ipToTest = ipToLong(InetAddress.getByName(dns.toString()));

                            if (ipToTest >= ipLo && ipToTest <= ipHi) {
                               found = true ;
                            }

                        }

                    }

                    if (!found) {
                        System.err.println("\nYou do not appear to be infected") ;
                        infected = "FALSE" ;
                    } else {
                        System.err.println("\nYou appear to be infected, please visit https://forms.fbi.gov/check-to-see-if-your-computer-is-using-rogue-DNS for more information") ;
                        infected = "TRUE" ;
                    };

                    return (ns) ;

                } catch (Exception e) {
                }

                return null;

            }

        });

        ready = true ;

    };

}