diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework4/Weissenberger/ProjectIdeaTeamGermany.jpg b/assignments/src/MV3500Cohort2020JulySeptember/homework4/Weissenberger/ProjectIdeaTeamGermany.jpg
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework4/Weissenberger/TCPReceiverVPNBridge.java b/assignments/src/MV3500Cohort2020JulySeptember/homework4/Weissenberger/TCPReceiverVPNBridge.java
new file mode 100644
index 0000000000000000000000000000000000000000..43a014be20109e9c245bb84136253d0995e10c67
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework4/Weissenberger/TCPReceiverVPNBridge.java
@@ -0,0 +1,99 @@
+
+package MV3500Cohort2020JulySeptember.homework4.Weissenberger;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.net.InetAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+/**
+ * Just for me for testing - not part of Homework #3!
+ * @author Loki
+ */
+public class TCPReceiverVPNBridge {
+
+ protected static String server_IP_VPN = "10.1.105.9"; // argon IP
+ protected static String server_IP_Local = "192.168.188.103"; // Local IP
+
+ private static final int server_Port = 2317 ;
+ protected static String client_IP ;
+
+ /**
+ * @param args the 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("TcpExample3Server has started..."); // it helps debugging to put this on console first
+
+ ServerSocket serverSocket = new ServerSocket(server_Port);
+ 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."); // 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("TcpExample3Server 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 TcpExample3Server 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/MV3500Cohort2020JulySeptember/homework4/Weissenberger/TcpServerForFinal.java b/assignments/src/MV3500Cohort2020JulySeptember/homework4/Weissenberger/TcpServerForFinal.java
new file mode 100644
index 0000000000000000000000000000000000000000..5e7066c139149084e89bd0cae45237e550476ddf
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework4/Weissenberger/TcpServerForFinal.java
@@ -0,0 +1,91 @@
+package MV3500Cohort2020JulySeptember.homework4.Weissenberger;
+
+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 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 TcpServerForFinal {
+
+ 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("TcpExample3Server has started..."); // it helps debugging to put this on console first
+
+ //ServerSocket serverSocket = new ServerSocket(2317);
+ InetAddress[] ia = InetAddress.getAllByName("192.168.188.106");
+ for (int i = 0;i < ia.length; i++){
+ System.out.println("---: "+ia[i]);
+ }
+ ServerSocket serverSocket = new ServerSocket(2317, 100, ia[0]);
+
+ InputStream is;
+ InputStreamReader isr;
+ BufferedReader br;
+ String serverMessage;
+
+
+ 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) {
+ System.out.println("Look for connection....");
+ // 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:
+ is = clientConnectionSocket.getInputStream();
+ isr = new InputStreamReader(is);
+ br = new BufferedReader(isr);
+
+ serverMessage = br.readLine();
+ System.out.println("The message the mobile sent was: '" + serverMessage + "'");
+ // 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.println ("Server loop " + serverLoopCount + ": ");
+
+ System.out.println("TcpExample3Server socket pair showing host name, address, port:");
+
+ }
+ }
+ } catch (IOException e) {
+ System.err.println("Problem with TcpExample3Server 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/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/.gitkeep b/assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/.gitkeep
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/ProjectIdeaTeamGermany.jpg b/assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/ProjectIdeaTeamGermany.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..b929a2853eca66fb3adc4f09d28f97cc8816adee
Binary files /dev/null and b/assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/ProjectIdeaTeamGermany.jpg differ
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/README.md b/assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..0144d62d033fbe094ceac7a6d1bedc12d3c158b0
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/README.md
@@ -0,0 +1,12 @@
+## Homework 2: Multicast Networking
+
+Modify this file to describe your project work.
+
+Typical deliverables include properly packages source, execution log, and screen shots as appropriate.
+
+References include
+* [README.md](../README.md) for this homework project.
+* [README.md](../../../../README.md) for course assignments execution instructions.
+* [assignments source subdirectories](../../../../../assignments/src) show examples from previous cohorts.
+
+Questions and innovation are always welcome, good luck!
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/TCPReceiverVPNBridge.java b/assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/TCPReceiverVPNBridge.java
new file mode 100644
index 0000000000000000000000000000000000000000..43a014be20109e9c245bb84136253d0995e10c67
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/TCPReceiverVPNBridge.java
@@ -0,0 +1,99 @@
+
+package MV3500Cohort2020JulySeptember.homework4.Weissenberger;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.net.InetAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+/**
+ * Just for me for testing - not part of Homework #3!
+ * @author Loki
+ */
+public class TCPReceiverVPNBridge {
+
+ protected static String server_IP_VPN = "10.1.105.9"; // argon IP
+ protected static String server_IP_Local = "192.168.188.103"; // Local IP
+
+ private static final int server_Port = 2317 ;
+ protected static String client_IP ;
+
+ /**
+ * @param args the 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("TcpExample3Server has started..."); // it helps debugging to put this on console first
+
+ ServerSocket serverSocket = new ServerSocket(server_Port);
+ 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."); // 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("TcpExample3Server 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 TcpExample3Server 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/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/TcpServerForFinal.java b/assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/TcpServerForFinal.java
new file mode 100644
index 0000000000000000000000000000000000000000..5e7066c139149084e89bd0cae45237e550476ddf
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/TcpServerForFinal.java
@@ -0,0 +1,91 @@
+package MV3500Cohort2020JulySeptember.homework4.Weissenberger;
+
+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 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 TcpServerForFinal {
+
+ 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("TcpExample3Server has started..."); // it helps debugging to put this on console first
+
+ //ServerSocket serverSocket = new ServerSocket(2317);
+ InetAddress[] ia = InetAddress.getAllByName("192.168.188.106");
+ for (int i = 0;i < ia.length; i++){
+ System.out.println("---: "+ia[i]);
+ }
+ ServerSocket serverSocket = new ServerSocket(2317, 100, ia[0]);
+
+ InputStream is;
+ InputStreamReader isr;
+ BufferedReader br;
+ String serverMessage;
+
+
+ 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) {
+ System.out.println("Look for connection....");
+ // 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:
+ is = clientConnectionSocket.getInputStream();
+ isr = new InputStreamReader(is);
+ br = new BufferedReader(isr);
+
+ serverMessage = br.readLine();
+ System.out.println("The message the mobile sent was: '" + serverMessage + "'");
+ // 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.println ("Server loop " + serverLoopCount + ": ");
+
+ System.out.println("TcpExample3Server socket pair showing host name, address, port:");
+
+ }
+ }
+ } catch (IOException e) {
+ System.err.println("Problem with TcpExample3Server 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!");
+ }
+ }
+ }
+}