diff --git a/assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting b/assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting deleted file mode 100644 index 492e78f857cc84ca5d90e986e9ba2cb65c5b6538..0000000000000000000000000000000000000000 --- a/assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting +++ /dev/null @@ -1,103 +0,0 @@ -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!"); - } - } - } -} diff --git a/assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting.java b/assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting.java index 492e78f857cc84ca5d90e986e9ba2cb65c5b6538..47ccc375d2671a5cf86c545b8c2b77ff1c053698 100644 --- a/assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting.java +++ b/assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting.java @@ -1,4 +1,4 @@ -package MV3500Cohort2021JulySeptember.homework1.Pugh; +package MV3500Cohort2021JulySeptember.homework1; import java.io.*; import java.net.*;