scanscript.java

有关JAVA的程序,研究P2P的chord协议,相信大家会喜欢的!

package javanet;
import java.util.*;
import java.net.*;
public class scanScript {
  Vector v=new Vector();
  Socket sockett;
  DatagramSocket socketu;
  DatagramPacket packet;
  int addr;
  String start;
  String head;
  String buf="0";
  int pos;
  public scanScript(String start) {
    this.start=start;
    String parts[]=start.split(",");
    this.pos=Integer.parseInt(parts[3]);
    this.head=parts[0]+"."+parts[1]+"."+parts[2]+".";
    try{socketu=new DatagramSocket();}catch(Exception er){er.printStackTrace();}
  }

  public Vector scanTCP()
  {
    try
    {
      String ip;
      if(pos<256)
      {
        sockett = new Socket(ip = head + pos, 8000);
        sockett.close();
        v.add(ip);
        throw new Exception();
      }
    }catch(Exception er){pos++;scanTCP();}
    return v;
  }
  public Vector scanUDP()
  {
    try
    {
      String ip;
      if (pos < 256) {
        ip=head+pos;
        socketu.connect(InetAddress.getByName(ip),8181);
        socketu.close();
        v.add(ip);
        throw new Exception();
      }
    }catch(Exception er){pos++;scanUDP();er.printStackTrace();}
    return v;
  }
/*  public static void main(String args[])
  {
    scanScript obj=new scanScript("127,0,0,0");
    Vector vc=obj.scanUDP();
    System.out.println(vc);
  }*/
}