dns.rar_java dns

/* * To change this template, choose Tools | Templates * and open the template in the editor. */ /** * * @author Marjorie */ import java.net.*; import java.io.*; import java.util.*; public class eserver implements Runnable { Socket socket; int id; int count; public static void main(String args[]) { int count=0; try { ServerSocket s= new ServerSocket(13); while(true) { Socket socket=s.accept(); eserver server=new eserver(socket,count); Thread t=new Thread(server); t.start(); } } catch(Exception e) { System.out.println("Exception caught is::"+e); } } eserver(Socket sa,int i) { socket=sa; id=i; } public void run() { int flag=0;StringTokenizer t; String id,ipAddress,str; int i; try{ InputStream is=socket.getInputStream(); InputStreamReader isr=new InputStreamReader(is); BufferedReader br=new BufferedReader(isr); String cls=br.readLine(); System.out.println("Client Requested : "+cls); if(cls.trim().equals("quit")) { System.out.println("Client has Disconnected....."); br.close(); } try{ OutputStream op=socket.getOutputStream(); PrintWriter pw=new PrintWriter(op); String clientid=cls; String val=""; String msg=""; FileReader fr=new FileReader("iptable.txt"); BufferedReader bf=new BufferedReader(fr); while(flag==0) { String b=bf.readLine(); if(b==null) break; t=new StringTokenizer(b); id=t.nextToken(); ipAddress=t.nextToken(); if(id.equals(clientid)) { System.out.println("URL :: "+id); System.out.println("IP Address :: "+ipAddress); val="*";flag=1;msg="URL="+id+" IP Address= "+ipAddress; } else { flag=0;msg="Sorry, Given URL is not Found....."; } } bf.close(); fr.close(); if(flag==1) pw.println(msg); else pw.println(msg); pw.flush(); pw.close(); } //endtry2 catch(Exception e) { System.out.println("Exception caught is::"+e); } }//endtry1 catch(IOException e){} //end while }//end run }