diff --git a/assignments/src/MV3500Cohort2022MayJune/homework1/AllenTcpExample1Telnet1.java b/assignments/src/MV3500Cohort2022MayJune/homework1/AllenTcpExample1Telnet1.java
deleted file mode 100644
index 2f3717e501458917d7676ac19ac8cbe4ae380e8a..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/AllenTcpExample1Telnet1.java
+++ /dev/null
@@ -1,92 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;;
-
-import java.io.*;
-import java.net.*;
-import java.io.*;
-import java.net.*;
-import java.io.*;
-import java.net.*;
-import java.io.*;
-import java.net.*;
-
-/**
- * The simplest possible TCP network program. It listens for
- * a connection, from telnet (telnet localhost 2317) or a program
- * you write, which we will do later. Right now the TcpExample simply
- * writes a string in response to a connection.
- *
- * Modifying his program is the basis for Assignment 1.
- *
- * Testing the running server program from telnet looks like this:
- *
- * it154916:projects mcgredo$ telnet localhost 2317
- * Trying ::1...
- * Connected to localhost.
- * Escape character is '^]'.
- * This was written by the server
- * Connection closed by foreign host.
- *
- * Notice that "This was written by the server" matches
- * what is written by the code below, over the output stream.
- *
- * After this first connection the program below drops out
- * the bottom of the program, and does not repeat itself.
- * The program exits.
- *
- * @author mcgredo
- * @author brutzman
- */
-public class AllenTcpExample1Telnet1
-{
- /**
- * Program invocation, execution starts here
- * @param args command-line arguments
- */
- public static void main(String[] args)
- {
- try
- {
- System.out.println("TcpExample1Telnet has started and is waiting for a connection.");
- System.out.println(" help: https://savage.nps.edu/Savage/developers.html#telnet");
- System.out.println(" enter (telnet localhost 2317) or (nc localhost 2317)..." );
-
- // The ServerSocket waits for a connection from a client.
- // It returns a Socket object when the connection occurs.
- ServerSocket serverSocket = new ServerSocket(2317);
-
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
-
- // The Socket object represents the connection between
- // the server and client, including a full duplex connection
- try (Socket clientConnection = serverSocket.accept()) // wait here for a client to connect
- {
- // OK we got something, time to respond!
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
- OutputStream os = clientConnection.getOutputStream();
- PrintStream ps = new PrintStream(os);
-
- ps.println("This client response was written by John Allen "); // to remote client
- ps.println("MOVES 2021 Cohort is well described by Johnny Smiles.");
- System.out.println("This server response was written by John Allen " ); // to server console
-
- // "flush()" in important in that it forces a write
- // across what is in fact a slow connection
- ps.flush();
- }
- System.out.println(" completed successfully.");
- }
- catch(IOException e)
- {
- System.err.println(" Pardon the interruption, networking issue"); // describe what is happening
- System.err.println(e);
- // Provide more helpful information to user if exception occurs due to running twice at one time
-
- // brute force exception checking, can be brittle if exception message changes
- // if (e.getMessage().equals("Address already in use: NET_Bind"))
- 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/MV3500Cohort2022MayJune/homework1/FisherTCPExample1Telnet.java b/assignments/src/MV3500Cohort2022MayJune/homework1/FisherTCPExample1Telnet.java
deleted file mode 100644
index 7655001e8d8590e042bd417cbc6cedcdac99d327..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/FisherTCPExample1Telnet.java
+++ /dev/null
@@ -1,67 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.PrintStream;
-import java.net.ServerSocket;
-import java.net.Socket;
-
-/**
- * homework assignment
- * @author adfis
- */
-
-
-public class FisherTCPExample1Telnet
-{
- /** run the program
- * @param args command-line arguments, string parameters (unused) */
- public static void main(String[] args)
- {
- try
- {
- System.out.println("TcpExample1Telnet has started and is waiting for a connection.");
- System.out.println(" help: https://savage.nps.edu/Savage/developers.html#telnet");
- System.out.println(" enter (telnet localhost 2317) or (nc localhost 2317)..." );
-
- // The ServerSocket waits for a connection from a client.
- // It returns a Socket object when the connection occurs.
- ServerSocket serverSocket = new ServerSocket(2317);
-
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
-
- // The Socket object represents the connection between
- // the server and client, including a full duplex connection
- try (Socket clientConnection = serverSocket.accept()) {
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
- OutputStream os = clientConnection.getOutputStream();
- PrintStream ps = new PrintStream(os);
-
- ps.println("Client response was written by Alex' server TcpExample1."); // to remote clientnc
- ps.println("We are crushing this assignment, good work.");
- System.out.println("Server response was written by Alex' server TcpExample1."); // to server console
- System.out.println("SUCCESS!");
-
- // "flush()" in important in that it forces a write
- // across what is in fact a slow connection
- ps.flush();
- }
- System.out.println("FisherTCPExample1 completed successfully.");
- }
- catch(IOException e)
- {
- System.err.println("Problem with FisherTCPExample1Telnet 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
-
- // brute force exception checking, can be brittle if exception message changes
- // if (e.getMessage().equals("Address already in use: NET_Bind"))
- 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/MV3500Cohort2022MayJune/homework1/FrankTCPExample3Client.java b/assignments/src/MV3500Cohort2022MayJune/homework1/FrankTCPExample3Client.java
deleted file mode 100644
index 5088e75c61f912125aa12dc551e210cce13cf562..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/FrankTCPExample3Client.java
+++ /dev/null
@@ -1,90 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.Reader;
-import java.net.Socket;
-
-/**
- * homework assignment
- * @author justi
- */
-public class FrankTCPExample3Client {
-
- /** IPv6 default */
- public final static String LOCALHOST = "0:0:0:0:0:0:0:1";
-
- /**
- * Program invocation, execution starts here
- * @param args command-line arguments
- */
- public static void main(String[] args)
- {
- // Local variables/fields
- Socket socket = null;
- InputStream is;
- Reader isr;
- BufferedReader br;
- String serverMessage;
- int clientLoopCount = 0;
-
- try {
- while (true) {
- clientLoopCount++; // increment at beginning of loop for reliability
- System.out.println(FrankTCPExample3Client.class.getName() + " creating socket...");
-
- // We request an IP to connect to ("localhost") and
- // port number at that IP (2317). This establishes
- // a connection to that IP in the form of a Socket
- // object; the server uses a ServerSocket to wait for
- // connections.
- socket = new Socket(LOCALHOST, 2318); // locohost?
-
- // Now hook everything up (i.e. set up the streams), Java style:
- is = socket.getInputStream();
- isr = new InputStreamReader(is);
- br = new BufferedReader(isr);
-
- // Read a single line written by the server. We'd
- // do things a bit differently if there were many lines to be read
- // from the server instead of one only.
- serverMessage = br.readLine();
- System.out.println("==================================================");
-
- System.out.print("Client loop " + clientLoopCount + ": ");
- System.out.println("now we're talking!");
- System.out.println("The message the server sent was: '" + serverMessage + "'");
- // socket gets closed, either automatically/silently by this code (or possibly by the server)
- if (serverMessage.equals("this is good bye message from the server")) { //if client recieved termanation message stop client
- break;
- }
- Thread.sleep(1000); // turned it down to 1 second
-
- } // end while(true) // infinite loops are dangerous, be sure to kill this process!
- }
- catch (IOException | InterruptedException e)
- {
- System.err.println("Problem with " + FrankTCPExample3Client.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!");
- }
- } finally // occurs after any other activity when shutting down
- {
- try {
- if (socket != null) {
- socket.close();
- }
- } catch (IOException e) {
- }
-
- // program exit: tell somebody about that happening. Likely cause: server drops connection.
- System.out.println();
- System.out.println("FrankTCPExample3Client.class.getName() + exit");
- }
- }
-}
diff --git a/assignments/src/MV3500Cohort2022MayJune/homework1/FrankTCPExample3Server.JPG b/assignments/src/MV3500Cohort2022MayJune/homework1/FrankTCPExample3Server.JPG
deleted file mode 100644
index a2652f97a08b14422f64213a8f3d0050257e8563..0000000000000000000000000000000000000000
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diff --git a/assignments/src/MV3500Cohort2022MayJune/homework1/FrankTCPExample3Server.java b/assignments/src/MV3500Cohort2022MayJune/homework1/FrankTCPExample3Server.java
deleted file mode 100644
index 4f2f56382d86421fa3a0dca356e9996ed4f8ba23..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/FrankTCPExample3Server.java
+++ /dev/null
@@ -1,108 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-import java.io.*;
-import java.net.*;
-
-/**
- * Very slightly more complex than example1, further modifying example2. 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.
- *
- * telnet (nc) localhost 2318
- *
- * If you're sophisticated you can contact the instructor's computer while
- * running this program.
- *
- * telnet (nc) [ipNumberOfServerLaptop] 2317
- *
- * and have the instructor display the socket pairs received.
- *
- * @author mcgredo
- * @author brutzman
- */
-public class FrankTCPExample3Server {
-
- /**
- * Program invocation, execution starts here If already compiled, can run
- * using console in directory ../../build/classes/ by invoking \ java
- * -classpath . TcpExamples.TcpExample3Server
- *
- * @param args command-line arguments
- */
- public static void main(String[] args)
- {
- try {
-
- // ServerSocket waits for a connection from a client.
- // Notice that it is outside the loop; ServerSocket
- // needs to be made only once.
- System.out.println(FrankTCPExample3Server.class.getName() + " has started..."); // it helps debugging to put this on console first
-
- ServerSocket serverSocket = new ServerSocket(2318); // changed from 2317 to 2318
- OutputStream os;
- PrintStream ps;
- InetAddress localAddress, remoteAddress;
- int localPort, remotePort;
- int serverLoopCount = 0;
-
- // Server is up and waiting (i.e. "blocked" or paused)
- // Loop, infinitely, waiting for client connections.
- // Stop the program somewhere else.
- while (true) {
-
- // block until connected to a client
- try ( Socket clientConnectionSocket = serverSocket.accept()) {
- serverLoopCount++; // increment at beginning of loop for reliability
-
- // Now hook everything up (i.e. set up the streams), Java style:
- os = clientConnectionSocket.getOutputStream();
- ps = new PrintStream(os);
- if (serverLoopCount <= 20) { // checking if the loop count <= 20
- ps.println("This is response " + serverLoopCount + " produced by the server."); // this gets sent back to client!
- } else {
- ps.println("this is good bye message from the server"); // termination after 20 messages
- break; // Stop server
- }
- // Print some information locally about the Socket connection.
- // This includes the port and IP numbers on both sides (the socket pair).
- localAddress = clientConnectionSocket.getLocalAddress();
- remoteAddress = clientConnectionSocket.getInetAddress();
- localPort = clientConnectionSocket.getLocalPort();
- remotePort = clientConnectionSocket.getPort();
-
- System.out.print("Server loop " + serverLoopCount + ": ");
-
- // 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 ))
- // Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54881 ))
- // Why is the first IP/port the same, while the second set has different ports?
- System.out.println(FrankTCPExample3Server.class.getName() + " socket pair showing host name, address, port:");
- System.out.println(" (( "
- + localAddress.getHostName() + "=" + localAddress.getHostAddress() + ", " + localPort + " ), ( "
- + remoteAddress.getHostName() + "=" + remoteAddress.getHostAddress() + ", " + remotePort + " ))");
-
- if (localAddress.getHostName().equals(localAddress.getHostAddress())
- || remoteAddress.getHostName().equals(remoteAddress.getHostAddress())) {
- System.out.println(" note HostName matches address if host has no DNS name");
- }
-
- // Not/*i*/ce the use of flush() and try w/ resources. Without
- // the try w/ resources the Socket object may stay open for
- // a while after the client has stopped needing this
- // connection. try w/ resources explicitly ends the connection.
- ps.flush();
- // like it or not, you're outta here!
- }
- }
- } catch (IOException e) {
- System.err.println("Problem with " + FrankTCPExample3Server.class.getName() + " networking: " + 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/MV3500Cohort2022MayJune/homework1/FrankTCPExample3ServerClient.JPG b/assignments/src/MV3500Cohort2022MayJune/homework1/FrankTCPExample3ServerClient.JPG
deleted file mode 100644
index 3a5853becfde3cdc97b73849da1f168963efe360..0000000000000000000000000000000000000000
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diff --git a/assignments/src/MV3500Cohort2022MayJune/homework1/HittnerDomTcpExample1Telnet.java b/assignments/src/MV3500Cohort2022MayJune/homework1/HittnerDomTcpExample1Telnet.java
deleted file mode 100644
index ec37e50b5ff59b0b998dd12abc7a884512a2c62d..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/HittnerDomTcpExample1Telnet.java
+++ /dev/null
@@ -1,66 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.PrintStream;
-import java.net.ServerSocket;
-import java.net.Socket;
-
-/**
- * homework assignment
- * @author adfis
- */
-
-
-public class HittnerDomTcpExample1Telnet
-{
- /** run the program
- * @param args command-line arguments, string parameters (unused) */
- public static void main(String[] args)
- {
- try
- {
- System.out.println("TcpExample1Telnet has started and is waiting for a connection.");
- System.out.println(" help: https://savage.nps.edu/Savage/developers.html#telnet");
- System.out.println(" enter (telnet localhost 2317) or (nc localhost 2317)..." );
-
- // The ServerSocket waits for a connection from a client.
- // It returns a Socket object when the connection occurs.
- ServerSocket serverSocket = new ServerSocket(2317);
-
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
-
- // The Socket object represents the connection between
- // the server and client, including a full duplex connection
- try (Socket clientConnection = serverSocket.accept()) {
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
- OutputStream os = clientConnection.getOutputStream();
- PrintStream ps = new PrintStream(os);
-
- ps.println("Client response was brought to you by the Domo"); // to remote clientnc
- ps.println("DomsaMom");
- System.out.println("Client response was brought to you by the Domo"); // to server console
- System.out.println("DomsaMom");
-
- // "flush()" in important in that it forces a write
- // across what is in fact a slow connection
- ps.flush();
- }
- System.out.println("TcpExample1 completed successfully.");
- }
- catch(IOException e)
- {
- System.err.println("Problem with TcpExample1Telnet 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
-
- // brute force exception checking, can be brittle if exception message changes
- // if (e.getMessage().equals("Address already in use: NET_Bind"))
- 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/MV3500Cohort2022MayJune/homework1/HittnerNickTcpExample1Telnet.java b/assignments/src/MV3500Cohort2022MayJune/homework1/HittnerNickTcpExample1Telnet.java
deleted file mode 100644
index 2dc1686f7791881759c7971f5bfdf360b2b19d76..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/HittnerNickTcpExample1Telnet.java
+++ /dev/null
@@ -1,66 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.PrintStream;
-import java.net.ServerSocket;
-import java.net.Socket;
-
-/**
- * homework assignment
- * @author adfis
- */
-
-
-public class HittnerNickTcpExample1Telnet
-{
- /** run the program
- * @param args command-line arguments, string parameters (unused) */
- public static void main(String[] args)
- {
- try
- {
- System.out.println("TcpExample1Telnet has started and is waiting for a connection.");
- System.out.println(" help: https://savage.nps.edu/Savage/developers.html#telnet");
- System.out.println(" enter (telnet localhost 2317) or (nc localhost 2317)..." );
-
- // The ServerSocket waits for a connection from a client.
- // It returns a Socket object when the connection occurs.
- ServerSocket serverSocket = new ServerSocket(2317);
-
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
-
- // The Socket object represents the connection between
- // the server and client, including a full duplex connection
- try (Socket clientConnection = serverSocket.accept()) {
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
- OutputStream os = clientConnection.getOutputStream();
- PrintStream ps = new PrintStream(os);
-
- ps.println("Client response was brought to you by the Highlander"); // to remote clientnc
- ps.println("There Can Be Only One");
- System.out.println("Client response was brought to you by the Highlander"); // to server console
- System.out.println("There Can be Only One");
-
- // "flush()" in important in that it forces a write
- // across what is in fact a slow connection
- ps.flush();
- }
- System.out.println("TcpExample1 completed successfully.");
- }
- catch(IOException e)
- {
- System.err.println("Problem with TcpExample1Telnet 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
-
- // brute force exception checking, can be brittle if exception message changes
- // if (e.getMessage().equals("Address already in use: NET_Bind"))
- 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/MV3500Cohort2022MayJune/homework1/KeevenTCPExample3Client.java b/assignments/src/MV3500Cohort2022MayJune/homework1/KeevenTCPExample3Client.java
deleted file mode 100644
index f318ba5ab1d4d68c6bbbd7f2a889a891ada842b1..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/KeevenTCPExample3Client.java
+++ /dev/null
@@ -1,100 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-import java.io.*;
-import java.net.*;
-
-/**
- * This is Assignment 1 where I have modified the given code from TCPExample3Client
- * -sleep time has been extended to give more time in between loops
- * -Initial print line has been altered to reflect assingnment 1
- * -Loop only runs a finite number of times ,10.
- * Before, we always used telnet (netcat) to connect to the server. Here we are
- * now writing our own program to do the connection.
- *
- * As you will see, when we run this after we start the server we will see the
- * same string telnet printed, sent by the server. The output at the server will
- * show different socket pairs for each time the loop iterates.
- *
- * @author mcgredo
- * @author brutzman
- */
-public class KeevenTCPExample3Client {
-
- /** IPv6 String constant for localhost address, similarly IPv4 127.0.0.1
- * @see <a href="https://en.wikipedia.org/wiki/localhost">https://en.wikipedia.org/wiki/localhost</a>
- * @see <a href="https://en.wikipedia.org/wiki/IPv6_address">https://en.wikipedia.org/wiki/IPv6_address</a>
- */
- public final static String LOCALHOST = "0:0:0:0:0:0:0:1";
-
- /**
- * Program invocation, execution starts here
- * @param args command-line arguments
- */
- public static void main(String[] args)
- {
-
- // Local variables/fields
- Socket socket = null;
- InputStream is;
- Reader isr;
- BufferedReader br;
- String serverMessage;
- int clientLoopCount = 0;
- int numbLoops = 10;
-
- try {
- while (clientLoopCount < numbLoops)
- {
- clientLoopCount++; // increment at beginning of loop for reliability
- System.out.println(KeevenTCPExample3Client.class.getName() + " creating socket...");
-
- // We request an IP to connect to ("localhost") and
- // port number at that IP (2317). This establishes
- // a connection to that IP in the form of a Socket
- // object; the server uses a ServerSocket to wait for
- // connections.
- socket = new Socket(LOCALHOST, 2317); // locohost?
-
- // Now hook everything up (i.e. set up the streams), Java style:
- is = socket.getInputStream();
- isr = new InputStreamReader(is);
- br = new BufferedReader(isr);
-
- // Read a single line written by the server. We'd
- // do things a bit differently if there were many lines to be read
- // from the server instead of one only.
- serverMessage = br.readLine();
- System.out.println("======================Assignment1===========================");
-
- System.out.print ("Client loop " + clientLoopCount + ": ");
- System.out.println("now we're talking!");
- System.out.println("The message the server sent was: '" + serverMessage + "'");
- // socket gets closed, either automatically/silently by this code (or possibly by the server)
-
- Thread.sleep(800l); // slow things down, for example 500l (long) = 500 msec
-
- } // end while(true) // infinite loops are dangerous, be sure to kill this process!
- }
- catch (IOException | InterruptedException e)
- {
- System.err.println("Problem with " + KeevenTCPExample3Client.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!");
- }
- }
- finally // occurs after any other activity when shutting down
- {
- try {
- if (socket != null)
- socket.close();
- } catch (IOException e) {}
-
- // program exit: tell somebody about that happening. Likely cause: server drops connection.
- System.out.println();
- System.out.println(KeevenTCPExample3Client.class.getName() + " exit");
- }
- }
-}
diff --git a/assignments/src/MV3500Cohort2022MayJune/homework1/KeevenTCPExample3Server.java b/assignments/src/MV3500Cohort2022MayJune/homework1/KeevenTCPExample3Server.java
deleted file mode 100644
index a3423cf6b5fdd89f12ea4e8019ea9c5f61c697b5..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/KeevenTCPExample3Server.java
+++ /dev/null
@@ -1,107 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-import java.io.*;
-import java.net.*;
-
-/**
- * This is Assignment 1 where I have modified the given code from TCPExample3Server
- *-server response message changed
- *
- * Very slightly more complex than example1, further modifying example2. 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.
- *
- * telnet (nc) localhost 2317
- *
- * If you're sophisticated you can contact the instructor's computer while
- * running this program.
- *
- * telnet (nc) [ipNumberOfServerLaptop] 2317
- *
- * and have the instructor display the socket pairs received.
- *
- * @author mcgredo
- * @author brutzman
- */
-public class KeevenTCPExample3Server {
-
- /**
- * Program invocation, execution starts here
- * If already compiled, can run using console in directory ../../build/classes/ by invoking \
- * java -classpath . TcpExamples.TcpExample3Server
- * @param args command-line arguments
- */
- public static void main(String[] args) {
- try {
-
- // ServerSocket waits for a connection from a client.
- // Notice that it is outside the loop; ServerSocket
- // needs to be made only once.
- System.out.println(KeevenTCPExample3Server.class.getName() + " has started..."); // it helps debugging to put this on console first
-
- ServerSocket serverSocket = new ServerSocket(2317);
- OutputStream os;
- PrintStream ps;
- InetAddress localAddress, remoteAddress;
- int localPort, remotePort;
- int serverLoopCount = 0;
-
- // Server is up and waiting (i.e. "blocked" or paused)
- // Loop, infinitely, waiting for client connections.
- // Stop the program somewhere else.
- while (true) {
-
- // block until connected to a client
- try (Socket clientConnectionSocket = serverSocket.accept())
- {
- serverLoopCount++; // increment at beginning of loop for reliability
-
- // Now hook everything up (i.e. set up the streams), Java style:
- os = clientConnectionSocket.getOutputStream();
- ps = new PrintStream(os);
- ps.println("This is response " + serverLoopCount + " produced by the server, "
- + KeevenTCPExample3Server.class.getName()); // this gets sent back to client!
-
- // Print some information locally about the Socket connection.
- // This includes the port and IP numbers on both sides (the socket pair).
- localAddress = clientConnectionSocket.getLocalAddress();
- remoteAddress = clientConnectionSocket.getInetAddress();
- localPort = clientConnectionSocket.getLocalPort();
- remotePort = clientConnectionSocket.getPort();
-
- System.out.print ("Server loop " + serverLoopCount + ": ");
-
- // 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 ))
- // Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54881 ))
-
- // Why is the first IP/port the same, while the second set has different ports?
- System.out.println(KeevenTCPExample3Server.class.getName() + " socket pair showing host name, address, port:");
- System.out.println(" (( " +
- localAddress.getHostName() + "=" + localAddress.getHostAddress() + ", " + localPort + " ), ( " +
- remoteAddress.getHostName() + "=" + remoteAddress.getHostAddress() + ", " + remotePort + " ))");
-
- if ( localAddress.getHostName().equals( localAddress.getHostAddress()) ||
- remoteAddress.getHostName().equals(remoteAddress.getHostAddress()))
- System.out.println(" note HostName matches address if host has no DNS name");
-
- // Notice the use of flush() and try w/ resources. Without
- // the try w/ resources the Socket object may stay open for
- // a while after the client has stopped needing this
- // connection. try w/ resources explicitly ends the connection.
- ps.flush();
- // like it or not, you're outta here!
- }
- }
- } catch (IOException e) {
- System.err.println("Problem with " + KeevenTCPExample3Server.class.getName() + " networking: " + 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/MV3500Cohort2022MayJune/homework1/LeckieTcpExample2.java b/assignments/src/MV3500Cohort2022MayJune/homework1/LeckieTcpExample2.java
deleted file mode 100644
index 9840d568accba730c1ede1060045d3d80ecf09fe..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/LeckieTcpExample2.java
+++ /dev/null
@@ -1,107 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.PrintStream;
-import java.net.InetAddress;
-import java.net.ServerSocket;
-import java.net.Socket;
-
-/**
- * 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 mcgredo
- * @author brutzman
- * @author leckie
- */
-public class LeckieTcpExample2
-{
- /**
- * 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(" 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
- int totalEntrantCount = 31; // spoofed entrants
-
- 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 " + LeckieTcpExample2.class.getName()); // to remote client
- System.out.println("This server response was written by server " + LeckieTcpExample2.class.getName()); // to server console
-
- ps.println("This is your lottery attempt number #" + connectionCount + ", you are aplicant number " + totalEntrantCount + " to try and win. Keep trying!");
-
- totalEntrantCount = (totalEntrantCount + 79);
- // 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 " + LeckieTcpExample2.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/MV3500Cohort2022MayJune/homework1/McNeelyTCPExample2.java b/assignments/src/MV3500Cohort2022MayJune/homework1/McNeelyTCPExample2.java
deleted file mode 100644
index 3f56434d00c2c1fd5b344f3d5878e0b82ea4f6e8..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/McNeelyTCPExample2.java
+++ /dev/null
@@ -1,105 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.PrintStream;
-import java.net.InetAddress;
-import java.net.ServerSocket;
-import java.net.Socket;
-
-/**
- * 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 mcgredo
- * @author brutzman
- * @author McNeely
- */
-public class McNeelyTCPExample2
-{
- /** run the program
- * @param args command-line arguments, string parameters (unused) */
- public static void main(String[] args)
- {
- try
- {
- System.out.println("Justin McNeely's TcpExample2 has started and is waiting for a connection...");
- System.out.println(" help: https://savage.nps.edu/Savage/developers.html#telnet");
- System.out.println(" enter (nc localhost 2317) or (telnet localhost 2317) to win..." );
-
- // 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
- int totalEntrantCount = 31; // spoofed entrants
-
- 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 " + McNeelyTCPExample2.class.getName()); // to remote client
- System.out.println("This server response was written by server " + McNeelyTCPExample2.class.getName()); // to server console
-
- ps.println("You have attempted " + connectionCount + " times, you are now aplicant number " + totalEntrantCount + " to win. Keep trying!");
-
- totalEntrantCount = (totalEntrantCount + 24);
- // 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! WINNING!, #" + 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 " + McNeelyTCPExample2.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/MV3500Cohort2022MayJune/homework1/MorrisTcpExample1Telnet.java b/assignments/src/MV3500Cohort2022MayJune/homework1/MorrisTcpExample1Telnet.java
deleted file mode 100644
index 38bbcc2768c17a68917f54b005e31564dbfa7a3d..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/MorrisTcpExample1Telnet.java
+++ /dev/null
@@ -1,86 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;;
-
-import java.io.*;
-import java.net.*;
-
-/**
- * The simplest possible TCP network program. It listens for
- * a connection, from telnet (telnet localhost 2317) or a program
- * you write, which we will do later. Right now the TcpExample simply
- * writes a string in response to a connection.
- *
- * Modifying his program is the basis for Assignment 1.
- *
- * Testing the running server program from telnet looks like this:
- *
- * it154916:projects mcgredo$ telnet localhost 2317
- * Trying ::1...
- * Connected to localhost.
- * Escape character is '^]'.
- * This was written by the server
- * Connection closed by foreign host.
- *
- * Notice that "This was written by the server" matches
- * what is written by the code below, over the output stream.
- *
- * After this first connection the program below drops out
- * the bottom of the program, and does not repeat itself.
- * The program exits.
- *
- * @author mcgredo
- * @author brutzman
- */
-public class MorrisTcpExample1Telnet
-{
- /**
- * Program invocation, execution starts here
- * @param args command-line arguments
- */
- public static void main(String[] args)
- {
- try
- {
- System.out.println("TcpExample1Telnet has started and is waiting for a connection.");
- System.out.println(" help: https://savage.nps.edu/Savage/developers.html#telnet");
- System.out.println(" enter (telnet localhost 2317) or (nc localhost 2317)..." );
-
- // The ServerSocket waits for a connection from a client.
- // It returns a Socket object when the connection occurs.
- ServerSocket serverSocket = new ServerSocket(2317);
-
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
-
- // The Socket object represents the connection between
- // the server and client, including a full duplex connection
- try (Socket clientConnection = serverSocket.accept()) // wait here for a client to connect
- {
- // OK we got something, time to respond!
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
- OutputStream os = clientConnection.getOutputStream();
- PrintStream ps = new PrintStream(os);
-
- ps.println("This client response was written by Johnny Smiles "); // to remote client
- ps.println("MOVES 2021 Cohort is full of badassery.");
- System.out.println("This server response was written by Johnny Smiles " ); // to server console
-
- // "flush()" in important in that it forces a write
- // across what is in fact a slow connection
- ps.flush();
- }
- System.out.println(" completed successfully.");
- }
- catch(IOException e)
- {
- System.err.println(" Pardon the interruption, networking issue"); // describe what is happening
- System.err.println(e);
- // Provide more helpful information to user if exception occurs due to running twice at one time
-
- // brute force exception checking, can be brittle if exception message changes
- // if (e.getMessage().equals("Address already in use: NET_Bind"))
- 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/MV3500Cohort2022MayJune/homework1/PughTcp2ConnectionCounting.java b/assignments/src/MV3500Cohort2022MayJune/homework1/PughTcp2ConnectionCounting.java
deleted file mode 100644
index a95d95748eb8d8774fd482b10b535cf1a5d1c718..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/PughTcp2ConnectionCounting.java
+++ /dev/null
@@ -1,104 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-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()) {
-
-
- 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 && connectionCount % 3 == 1) {
- System.out.println("Gators!");
- }
- if (connectionCount % 3 == 1 && connectionCount != 0) {
- System.out.println("O'Doyle Rules!!!");
- }
- 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();
- connectionCount++; // got another one!
- }
- }
- } 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/MV3500Cohort2022MayJune/homework1/ReynoldsTcpExample1Telnet1.java b/assignments/src/MV3500Cohort2022MayJune/homework1/ReynoldsTcpExample1Telnet1.java
deleted file mode 100644
index 8541e83a90462a21210422e5e616818bdbecaec9..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/ReynoldsTcpExample1Telnet1.java
+++ /dev/null
@@ -1,75 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.PrintStream;
-import java.net.ServerSocket;
-import java.net.Socket;
-
-/**
- * homework assignment
- * @author kReynolds
- */
-
-
-public class ReynoldsTcpExample1Telnet1
-{
- /** run the program
- * @param args command-line arguments, string parameters (unused) */
- public static void main(String[] args)
- {
- try
- {
- System.out.println("TcpExample1Telnet has started and is waiting for a connection.");
- System.out.println(" help: https://savage.nps.edu/Savage/developers.html#telnet");
- System.out.println(" enter (telnet localhost 2317) or (nc localhost 2317)... \n" );
-
- // The ServerSocket waits for a connection from a client.
- // It returns a Socket object when the connection occurs.
- ServerSocket serverSocket = new ServerSocket(2317);
-
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
-
- // The Socket object represents the connection between
- // the server and client, including a full duplex connection
- try (Socket clientConnection = serverSocket.accept()) {
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
- OutputStream os = clientConnection.getOutputStream();
- PrintStream ps = new PrintStream(os);
-
- ps.println("Initiating Client-side handshake... \n"); // to remote clientnc
- ps.println("Requesting authentication...");
- ps.println("Authentication granted \n");
-
- ps.println("Secret message sent to host \n");
- ps.println("Disconnecting from host...");
-
- System.out.println("Conducting server-side handshake..."); // to server console
- System.out.println("Granting authentication \n");
-
- System.out.println("Secret message recieved from client...");
- System.out.println("Client sent 'hello' message \n");
- System.out.println("Disconnecting connection to client... \n");
-
- // "flush()" in important in that it forces a write
- // across what is in fact a slow connection
- ps.flush();
- }
- System.out.println("TcpExample1 completed successfully.");
- }
- catch(IOException e)
- {
- System.err.println("Problem with TcpExample1Telnet 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
-
- // brute force exception checking, can be brittle if exception message changes
- // if (e.getMessage().equals("Address already in use: NET_Bind"))
- 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/MV3500Cohort2022MayJune/homework1/RobinsonTcpExample1Telnet.java b/assignments/src/MV3500Cohort2022MayJune/homework1/RobinsonTcpExample1Telnet.java
deleted file mode 100644
index 5ac1aa1797862c494d16b5c458904e0304b11cc3..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/RobinsonTcpExample1Telnet.java
+++ /dev/null
@@ -1,63 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.PrintStream;
-import java.net.ServerSocket;
-import java.net.Socket;
-
-/**
- * homework assignment
- * @author mrobi
- */
-public class RobinsonTcpExample1Telnet
-{
- /** run the program
- * @param args command-line arguments, string parameters (unused) */
- public static void main(String[] args)
- {
- try
- {
- System.out.println("TcpExample1Telnet has started and is waiting for a connection.");
- System.out.println(" help: https://savage.nps.edu/Savage/developers.html#telnet");
- System.out.println(" enter (telnet localhost 2317) or (nc localhost 2317)..." );
-
- // The ServerSocket waits for a connection from a client.
- // It returns a Socket object when the connection occurs.
- ServerSocket serverSocket = new ServerSocket(2317);
-
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
-
- // The Socket object represents the connection between
- // the server and client, including a full duplex connection
- try (Socket clientConnection = serverSocket.accept()) {
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
- OutputStream os = clientConnection.getOutputStream();
- PrintStream ps = new PrintStream(os);
-
- ps.println("Client response was written by Matt's server TcpExample1."); // to remote clientnc
- ps.println("Can you hear me?");
- System.out.println("Client response was written by Matt's server TcpExample1."); // to server console
- System.out.println("Yes");
-
- // "flush()" in important in that it forces a write
- // across what is in fact a slow connection
- ps.flush();
- }
- System.out.println("TcpExample1 completed successfully.");
- }
- catch(IOException e)
- {
- System.err.println("Problem with FisherTCPExample1Telnet 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
-
- // brute force exception checking, can be brittle if exception message changes
- // if (e.getMessage().equals("Address already in use: NET_Bind"))
- 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/MV3500Cohort2022MayJune/homework1/SchlesselTcpExample1Telnet.java b/assignments/src/MV3500Cohort2022MayJune/homework1/SchlesselTcpExample1Telnet.java
deleted file mode 100644
index 7a7dad3f4a2a09b89dc29e4bff9069faada30cc7..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/SchlesselTcpExample1Telnet.java
+++ /dev/null
@@ -1,65 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-import java.io.*;
-import java.net.*;
-
-/**
- * Homework 1
- *
- * @author max schlessel
- */
-public class SchlesselTcpExample1Telnet
-{
- /**
- * Program invocation, execution starts here
- * @param args command-line arguments
- */
- public static void main(String[] args)
- {
- try
- {
- System.out.println(SchlesselTcpExample1Telnet.class.getName() + " has started and is waiting for a connection.");
- System.out.println(" help: https://savage.nps.edu/Savage/developers.html#telnet");
- System.out.println(" enter (telnet localhost 2317) or (nc localhost 2317)..." );
-
- // The ServerSocket waits for a connection from a client.
- // It returns a Socket object when the connection occurs.
- ServerSocket serverSocket = new ServerSocket(2317);
-
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
-
- // The Socket object represents the connection between
- // the server and client, including a full duplex connection
- try (Socket clientConnection = serverSocket.accept()) // wait here for a client to connect
- {
- // OK we got something, time to respond!
- // Use Java io classes to write text (as opposed to
- // unknown bytes of some sort) to the client
- OutputStream os = clientConnection.getOutputStream();
- PrintStream ps = new PrintStream(os);
-
- ps.println("This client response was written by Max's client " + SchlesselTcpExample1Telnet.class.getName()); // to remote client
- ps.println("aka the shot heard round the world");
- System.out.println("This server response was written by Max's server " + SchlesselTcpExample1Telnet.class.getName()); // to server console
- System.out.println("boom");
-
- // "flush()" in important in that it forces a write
- // across what is in fact a slow connection
- ps.flush();
- }
- System.out.println(SchlesselTcpExample1Telnet.class.getName() + " completed successfully.");
- }
- catch(IOException e)
- {
- System.err.println("Exception with " + SchlesselTcpExample1Telnet.class.getName() + " networking:"); // describe what is happening
- System.err.println(e);
- // Provide more helpful information to user if exception occurs due to running twice at one time
-
- // brute force exception checking, can be brittle if exception message changes
- // if (e.getMessage().equals("Address already in use: NET_Bind"))
- 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/MV3500Cohort2022MayJune/homework1/TcpExample2_Leckie_Mod_Hw1.java b/assignments/src/MV3500Cohort2022MayJune/homework1/TcpExample2_Leckie_Mod_Hw1.java
deleted file mode 100644
index e48eff8bbdf1745948c63ae3db12cc4cd97a036f..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2022MayJune/homework1/TcpExample2_Leckie_Mod_Hw1.java
+++ /dev/null
@@ -1,107 +0,0 @@
-package MV3500Cohort2021JulySeptember.homework1;
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.PrintStream;
-import java.net.InetAddress;
-import java.net.ServerSocket;
-import java.net.Socket;
-
-/**
- * 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 mcgredo
- * @author brutzman
- * @author leckie
- */
-public class TcpExample2_Leckie_Mod_Hw1
-{
- /**
- * 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(" 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
- int totalEntrantCount = 31; // spoofed entrants
-
- 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 " + TcpExample2_Leckie_Mod_Hw1.class.getName()); // to remote client
- System.out.println("This server response was written by server " + TcpExample2_Leckie_Mod_Hw1.class.getName()); // to server console
-
- ps.println("This is your lottery attempt number #" + connectionCount + ", you are applicant number " + totalEntrantCount + " to try and win. Keep trying!");
-
- totalEntrantCount = (totalEntrantCount + 79);
- // 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 " + TcpExample2_Leckie_Mod_Hw1.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!");
- }
- }
-
-}