Port Scaner

/*
 * Semplice Port Scanner
 */
import java.io.*; 
import java.net.*; 
import java.util.*;

public class PortScan{
    private int portStart = 1;
    private int portStop = 1024;
    private String ipAddress = "127.0.0.1";

    public PortScan(){}

    public void setIpAddress(String ipAddress){
        this.ipAddress = ipAddress;
    }

    public void setPortStart(int portStart){
        this.portStart = portStart;
    }

    public void setPortStop(int portStop){
        this.portStop = portStop;
    }

    public void start(){
      int inc;
      int i;
      ScanRange sr;

      System.out.println(toString());
      System.out.println("\nPorte aperte....\n");
      inc = (int)((portStop - portStart) / 10.0 + .5);
      for(i=portStart; i < (portStop - inc); i+=inc){
        sr = new ScanRange(ipAddress, i, i+inc-1);
        //System.out.println(sr.toString());
        sr.start();
      }
      sr = new ScanRange(ipAddress, i, portStop);
      //System.out.println(sr.toString());
      sr.start();
    }


    public static void main (String[] args) {
      PortScan ps = new PortScan();
      // legge i parametri
      if(args.length == 0){
          System.out.println("Sintassi: PortScan <ipAddress> <portStart> <portStop>");
      }else{
          if(args.length > 0)
              ps.setIpAddress(args[0]);
              if(args.length > 1)
                  ps.setPortStart(Integer.parseInt(args[1]));
                      if(args.length > 2)
                          ps.setPortStop(Integer.parseInt(args[2]));
      }
      ps.start();
    }

   public String toString(){
       return "Port scan su " + ipAddress + " dalla porta " + portStart + " alla " + portStop;
   }
}

class ScanRange extends Thread{
    private int startPort;
    private int stopPort;
    private String ipAddress;
    private Socket s;

    public ScanRange(String ipAddress, int startPort, int stopPort){
        this.ipAddress = ipAddress;
        this.startPort = startPort;
        this.stopPort = stopPort;
    }

    public void run(){
      for(int i=startPort; i <= stopPort; i++){
          try {
             s = new Socket(ipAddress, i);
             System.out.print(" ( " + i + " ) ");
             s.close();
             s=null;
          }catch(Exception e) {}
          try {
              sleep(100);
              //yield();
          }catch(Exception e) {}
      }
    }

    public String toString(){
      return "Thread range: " + startPort + " - " + stopPort + " avviato";
    }

}

/*
 * Semplice Port Scanner
 */
import java.io.*; 
import java.net.*; 
import java.util.*;

public class PortScan2 {
    private int portStart = 1;
    private int portStop = 1024;
    private String ipAddress = "127.0.0.1";

    public PortScan2 () {}

    public void setIpAddress(String ipAddress){
        this.ipAddress = ipAddress;
    }

    public void setPortStart(int portStart){
        this.portStart = portStart;
    }

    public void setPortStop(int portStop){
        this.portStop = portStop;
    }

    public void start(){
      int inc;
      int i;
      ScanRange sr;

      System.out.println(toString());
      System.out.println("\nPorte aperte....\n");
      inc = (int)((portStop - portStart) / 10.0 + .5);
      for(i=portStart; i < (portStop - inc); i+=inc){
        sr = new ScanRange(ipAddress, i, i+inc-1);
        //System.out.println(sr.toString());
        sr.start();
      }
      sr = new ScanRange(ipAddress, i, portStop);
      //System.out.println(sr.toString());
      sr.start();
    }


    public static void main (String[] args) {
      PortScan ps = new PortScan();
      // legge i parametri
      if(args.length == 0){
          System.out.println("Sintassi: PortScan <ipAddress> <portStart> <portStop>");
      }else{
          if(args.length > 0)
              ps.setIpAddress(args[0]);
              if(args.length > 1)
                  ps.setPortStart(Integer.parseInt(args[1]));
                      if(args.length > 2)
                          ps.setPortStop(Integer.parseInt(args[2]));
      }
      ps.start();
    }

   public String toString(){
       return "Port scan su " + ipAddress + " dalla porta " + portStart + " alla " + portStop;
   }
}

class ScanRange extends Thread{
    private int startPort;
    private int stopPort;
    private String ipAddress;
    // private Socket s;
    private DatagramSocket s;

    public ScanRange(String ipAddress, int startPort, int stopPort){
        this.ipAddress = ipAddress;
        this.startPort = startPort;
        this.stopPort = stopPort;
    }

    public void run(){
      for(int i=startPort; i <= stopPort; i++){
          try {
             //s = new Socket(ipAddress, i);
             s = new DatagramSocket(i, InetAddress.getByName(ipAddress));
             System.out.print(" ( " + i + " ) ");
             s.close();
             s=null;
          }catch(Exception e) {}
          try {
              sleep(100);
              //yield();
          }catch(Exception e) {}
      }
    }

    public String toString(){
      return "Thread range: " + startPort + " - " + stopPort + " avviato";
    }
}