import java.io.*;
import java.net.*;
import java.util.*;
public class SocketPort {
public static void main(String[] args) {
String ip = "192.168.0.1";
String hostname = new String();
try{ //get the target ip address and hostname
InetAddress address = InetAddress.getByName(ip);
System.out.println(address);
hostname = address.getHostName();
System.out.println(hostname);
}
catch(UnknownHostException e){
System.out.println("Could not find "+ ip);
}
try{ // creat the output file
PrintWriter fout = new PrintWriter( new FileWriter("PortInf.txt"));
fout.println("Information Of The Port On the " + hostname +"computer ");
System.out.println("Information Of The Port On the " + hostname +"computer ");
fout.println();
// do ports scan
for(int nport = 24;nport <= 60;++nport){
try{
Socket s = new Socket(hostname,nport);
fout.println("The port " + nport + " is open!");
System.out.println("The port " + nport + " is open!");
fout.println("Connected to "+ s.getInetAddress() + " on port " + s.getPort() + " from port "+ s.getLocalPort() + " of " + s.getLocalAddress());
System.out.println("Connected to "+ s.getInetAddress() + " on port " + s.getPort() + " from port "+ s.getLocalPort() + " of " + s.getLocalAddress());
//print the connected socket information
}
catch(IOException e){
fout.println("The port " + nport + " is closed!");
System.out.println("The port " + nport + " is closed!");
}
}
fout.close();
}
catch(IOException e){}
}
}