// Programmer: COSC 439/522, F '21 // Server program // File name: "TCPServer.java" // When you run this program, you must give the service port // number as a command line argument. For example, //...

do the 4 tasks which given in the assignment in client and server. coding have to done source code is provided


// Programmer: COSC 439/522, F '21 // Server program // File name: "TCPServer.java" // When you run this program, you must give the service port // number as a command line argument. For example, // java TCPServer 22222 import java.io.*; import java.net.*; public class ntaTCPServer { private static ServerSocket servSock; public static void main(String[] args) { System.out.println("Opening port...\n"); try{ // Create a server object servSock = new ServerSocket(Integer.parseInt(args[0])); } catch(IOException e){ System.out.println("Unable to attach to port!"); System.exit(1); } do { run(); }while (true); } private static void run() { Socket link = null; try{ // Put the server into a waiting state link = servSock.accept(); // Set up input and output streams for socket BufferedReader in = new BufferedReader(new InputStreamReader(link.getInputStream())); PrintWriter out = new PrintWriter(link.getOutputStream(),true); // print local host name String host = InetAddress.getLocalHost().getHostName(); System.out.println("Client has estabished a connection to " + host); // Receive and process the incoming data int numMessages = 0; String message = in.readLine(); while (!message.equals("DONE")) { System.out.println(message); numMessages ++; message = in.readLine(); } // Send a report back and close the connection out.println("Server received " + numMessages + " messages"); } catch(IOException e){ e.printStackTrace(); } finally{ try{ System.out.println("!!!!! Closing connection... !!!!!\n" + "!!! Waiting for the next connection... !!!"); link.close(); } catch(IOException e){ System.out.println("Unable to disconnect!"); System.exit(1); } } } } // Programmer: COSC 439/522, F '21 // Client program // File name: TCPClient.java // When you run this program, you must give both the host name and // the service port number as command line arguments. For example, // java TCPClient localhost 22222 import java.io.*; import java.net.*; public class ntaTCPClient { private static InetAddress host; public static void main(String[] args) { try { // Get server IP-address host = InetAddress.getByName(args[0]); } catch(UnknownHostException e){ System.out.println("Host ID not found!"); System.exit(1); } run(Integer.parseInt(args[1])); } private static void run(int port) { Socket link = null; try{ // Establish a connection to the server link = new Socket(host,port); // Set up input and output streams for the connection BufferedReader in = new BufferedReader( new InputStreamReader(link.getInputStream())); PrintWriter out = new PrintWriter( link.getOutputStream(),true); //Set up stream for keyboard entry BufferedReader userEntry = new BufferedReader(new InputStreamReader(System.in)); String message, response; // Get data from the user and send it to the server do{ System.out.print("Enter message: "); message = userEntry.readLine(); out.println(message); }while (!message.equals("DONE")); // Receive the final report and close the connection response = in.readLine(); System.out.println(response); } catch(IOException e){ e.printStackTrace(); } finally{ try{ System.out.println("\n!!!!! Closing connection... !!!!!"); link.close(); } catch(IOException e){ System.out.println("Unable to disconnect!"); System.exit(1); } } } }