Homework 1: Pugh

assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting

-package MV3500Cohort2021JulySeptember.homework1.Pugh;
-
-import java.io.*;
-import java.net.*;
-
-/**
- * Very slightly more complex than example1. The only thing this does
- * differently is introduce a loop into the response, so you don't have to
- * restart the program after one response. Also, it prints out the socket pair
- * the server sees. Run the program via telnet several times and compare the
- * socket pairs.
- *
- * <code>telnet localhost 2317</code>
- *
- * If you're sophisticated you can contact the instructor's computer while
- * running this program.
- *
- * <code>telnet ipOfServersLaptop 2317</code>
- *
- * And have that machine display the socket pairs received.
- *
- * @author pugh
- * @author brutzman
- */
-public class PughTcp2ConnectionCounting {
-
-    /**
-     * Program invocation, execution starts here
-     *
-     * @param args command-line arguments
-     */
-    public static void main(String[] args) {
-        try {
-            System.out.println("TcpExample2ConnectionCounting has started and is waiting for a connection.");
-            System.out.println("Get Ready To Network!!!");
-            System.out.println("  help: https://savage.nps.edu/Savage/developers.html#telnet");
-            System.out.println("  enter (nc localhost 2317) or (telnet localhost 2317)...");
-
-            // ServerSocket waits for a connection from a client. 
-            // Notice that it is outside the loop; ServerSocket needs to be made only once.
-            int connectionCount = 0; // state variable
-
-            ServerSocket serverSocket = new ServerSocket(2317); // server decides here what port to listen on.
-            // of interest: often client doesn't care what port it uses locally when connecting to that server port.
-
-            // Loop, infinitely, waiting for client connections.
-            // Stop the program somewhere else.
-            while (true) {
-                // blocks! then proceeds once a connection is "accept"ed
-                try ( Socket clientConnection = serverSocket.accept()) {
-                    connectionCount++; // got another one!
-
-                    OutputStream os = clientConnection.getOutputStream();
-                    PrintStream ps = new PrintStream(os);
-
-                    ps.println("This client response was written by server " + PughTcp2ConnectionCounting.class.getName()); // to remote client
-                    System.out.println("This server response was written by server " + PughTcp2ConnectionCounting.class.getName() + "\n"); // to server console
-                    if (connectionCount % 2 == 1) {
-                        System.out.println("Go\n");
-                    }
-                    if (connectionCount % 2 == 0) {
-                        System.out.println("Gators!\n");
-                    }
-                    if (connectionCount % 3 == 1 && connectionCount != 0) {
-                        System.out.println("O'Doyle Rules!!! \n");
-                    }
-                    ps.println("You were connection #" + connectionCount + ", by my count");
-
-                    // Print some information locally about the Socket connection.
-                    // This includes the port and IP numbers on both sides (the socket pair.)
-                    InetAddress localAddress = clientConnection.getLocalAddress();
-                    InetAddress remoteAddress = clientConnection.getInetAddress();
-
-                    int localPort = clientConnection.getLocalPort();
-                    int remotePort = clientConnection.getPort();       // remember the prior question, why are 2 ports different?
-
-                    // My socket pair connection looks like this, to localhost:
-                    // Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54876 )) note IPv6
-                    // Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54881 ))
-                    //
-                    // Why is first IP/port the same, while the second set has different ports?
-                    System.out.println("Socket pair: (( " + localAddress.toString() + ", " + localPort + " ), ( "
-                            + remoteAddress.toString() + ", " + remotePort + " ))");
-
-                    System.out.println("got another connection, #" + connectionCount); // report progress
-
-                    // Notice the use of flush() and close(). Without
-                    // the close() to Socket object may stay open for
-                    // a while after the client has stopped needing this
-                    // connection. Close() explicitly ends the connection.
-                    ps.flush();
-                }
-            }
-        } catch (IOException e) {
-            System.err.println("Problem with  " + PughTcp2ConnectionCounting.class.getName() + " networking:"); // describe what is happening
-            System.err.println("Error: " + e);
-            // Provide more helpful information to user if exception occurs due to running twice at one time
-            if (e instanceof java.net.BindException) {
-                System.err.println("*** Be sure to stop any other running instances of programs using this port!");
-            }
-        }
-    }
-}

assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting.java

-package MV3500Cohort2021JulySeptember.homework1.Pugh;
+package MV3500Cohort2021JulySeptember.homework1;
 
 import java.io.*;
 import java.net.*;