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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Britt/Diagram.pdf b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Britt/Diagram.pdf
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiServerThread.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiServerThread.java
index a8dfc011f097413cb779d4dd88927c7801f55da0..ad3238eaeb477600fca454267e2ebd9d28477179 100644
--- a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiServerThread.java
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Weissenberger/LokiServerThread.java
@@ -6,7 +6,7 @@ import java.net.*;
/**
* A program that handles all logic associated with one socket connection
* by running in a thread of its own. This is the server
- * portion
+ * portion (little changes)
*
* @author Bernd Weissenberger
*/
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Garibay/UDPReceiverGaribay.java b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Garibay/UDPReceiverGaribay.java
new file mode 100644
index 0000000000000000000000000000000000000000..2f1b250b8d9b45e30625ddfc4de3c28441861ba4
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Garibay/UDPReceiverGaribay.java
@@ -0,0 +1,88 @@
+
+package MV3500Cohort2020JulySeptember.homework3.Garibay;
+
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+
+/**
+ *
+ * @author chris
+ */
+public class UDPReceiverGaribay
+{
+// public static final int SENDING_PORT = 1414; // port used by UdpSender, unneeded here
+ public static final int RECEIVING_PORT = 1415;
+ public static final String DESINATION_HOST = "localhost";
+
+ /**
+ * @param args the command line arguments
+ * @throws java.io.IOException
+ */
+ public static void main(String[] args) throws IOException
+ {
+ DatagramSocket udpSocket = null;
+
+ try
+ {
+ System.out.println(UdpReceiver.class.getName() + " started...");
+
+ // Create a UDP socket
+ udpSocket = new DatagramSocket(RECEIVING_PORT);
+ udpSocket.setReceiveBufferSize(1500); // how many bytes are in buffer? MTU=1500 is good
+ udpSocket.setBroadcast(false); // we're just receiving here
+
+ byte[] byteArray = new byte[1500];
+ DatagramPacket receivePacket = new DatagramPacket(byteArray, byteArray.length);
+
+ ByteArrayInputStream bais = new ByteArrayInputStream(byteArray);
+ DataInputStream dis = new DataInputStream(bais);
+
+ boolean isEvenParity;
+ int packetCount = 0;
+ int firstInt;
+ float secondFloat;
+ String thirdString;
+ String padding;
+
+ // You need a new receiving packet to read from every packet received
+ while (true)
+ {
+ packetCount++; // good practice to increment counter at start of loop, when possible
+ udpSocket.receive(receivePacket); // blocks until packet is received
+
+ // values of interest follow. order and types of what was sent must match what you are reading!
+ firstInt = dis.readInt(); // packetID
+ secondFloat = dis.readFloat();
+ thirdString = dis.readUTF(); // string value with guaranteed encoding, matches UTF-8 is 8 bit
+ isEvenParity = dis.readBoolean(); // ok, we've gotten everything we're looking for.
+
+ dis.reset(); // now clear the input stream after reading, in preparation for next loop
+
+ if (isEvenParity)
+ padding = " ";
+ else padding = "";
+
+ System.out.println("[" + UdpReceiver.class.getName() + "]" +
+ " packetID=" + firstInt + // have output message use same name as sender
+ ", second float value=" + secondFloat +
+ ", third String value=\"" + thirdString + "\"" + // note that /" is literal quote character
+ " isPacketIdEvenParity=" + isEvenParity + "," + padding +
+ " packet counter=" + packetCount);
+ }
+ }
+ catch(IOException e)
+ {
+ System.err.println("Problem with UdpReceiver, see exception trace:");
+ System.err.println(e);
+ }
+ finally // clean up prior to exit, don't want to leave behind zombie socket
+ {
+ if (udpSocket != null)
+ udpSocket.close();
+ System.out.println(UdpReceiver.class.getName() + " complete."); // all done
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Garibay/UDPSenderGaribay.java b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Garibay/UDPSenderGaribay.java
new file mode 100644
index 0000000000000000000000000000000000000000..21c6de803955c64d7ea0a8d431185b524e839733
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Garibay/UDPSenderGaribay.java
@@ -0,0 +1,114 @@
+
+package MV3500Cohort2020JulySeptember.homework3.Garibay;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+
+/**
+ *
+ * @author chris
+ */
+public class UDPSenderGaribay
+{
+ // System properties: https://docs.oracle.com/javase/tutorial/essential/environment/sysprop.html
+ public static final String MY_NAME = System.getProperty("user.name"); // guru incantation 8)
+// public static final int SENDING_PORT = 1414; // not needed, can let system choose an open local port
+ public static final int RECEIVING_PORT = 1415;
+ public static final int TOTAL_PACKETS_TO_SEND = 100;
+
+ // here is what we need for lab comms
+ // Bill Mahan's host ip
+ public static final String DESTINATION_HOST = "10.1.105.13"; // localhost 127.0.0.1 or argon 10.1.105.1 or 10.1.105.1 or whatever
+
+ @SuppressWarnings("SleepWhileInLoop")
+ public static void main(String[] args) throws IOException
+ {
+ DatagramSocket udpSocket = null;
+ DataOutputStream dos = null;
+ int packetID = 0; // counter variable to send in packet
+ float value = -1.0f; // unreachable value is good sentinel to ensure expected changes occur
+ String message = MY_NAME + "It's not a trick question!"; // no really
+ String padding = new String();
+
+ try
+ {
+ System.out.println(UdpSender.class.getName() + " shows how to send simple-type values via DataOutputStream");
+ System.out.println(UdpSender.class.getName() + " started...");
+
+ // Create a UDP socket
+ udpSocket = new DatagramSocket(); // let system assign output port, then SENDING_PORT not needed
+
+ // Put together a message with binary content. "ByteArrayOutputStream"
+ // is a java.io utility that lets us put together an array of binary
+ // data, which we put into the UDP packet.
+
+ ByteArrayOutputStream baos = new ByteArrayOutputStream(1500); // how many bytes are in buffer? MTU=1500 is good
+ dos = new DataOutputStream(baos); // wrapper for writing values, connects both streams
+
+ // Put together a packet to send
+ // these types and order of variables must match on sender and receiver
+ byte[] byteArray = baos.toByteArray();
+
+ // ID of the host we are sending to
+ InetAddress destinationAddress = InetAddress.getByName(DESTINATION_HOST);
+ // ID of the host we are sending from
+ InetAddress sourceAddress = InetAddress.getByName("localhost"); // possibly identical if source not modified
+
+ DatagramPacket datagramPacket = new DatagramPacket(byteArray, byteArray.length, destinationAddress, RECEIVING_PORT);
+
+ // Hmmm, how fast does UDP stream go? Does UDP effectively slow packets down, or does
+ // this cause network problems? (hint: yes for an unlimited send rate, unlike TCP).
+ // How do you know on the receiving side that you haven't received a
+ // duplicate UDP packet, out-of-order packet, or dropped packet? your responsibility.
+
+ for (int index = 1; index <= TOTAL_PACKETS_TO_SEND; index++) // avoid infinite send loops in code, they can be hard to kill!
+ {
+ packetID++; // increment counter, prefer using explicit value to index
+ value = TOTAL_PACKETS_TO_SEND - packetID; // countdown
+ boolean isPacketIdEvenParity = ((packetID % 2) == 0); // % is modulo operator; result 0 is even parity, 1 is odd parity
+
+ // values of interest follow. order and types of what was sent must match what you are reading!
+ dos.writeInt (packetID);
+ dos.writeFloat (value);
+ dos.writeUTF (message); // string value with guaranteed encoding, matches UTF-8 is 8 bit
+ dos.writeBoolean(isPacketIdEvenParity);
+
+ dos.flush(); // sends DataOutputStream to ByteArrayOutputStream
+ byteArray = baos.toByteArray(); // OK so go get the flushed result...
+ datagramPacket.setData(byteArray); // and put it in the packet...
+ udpSocket.send(datagramPacket); // and send it away. boom gone, nonblocking.
+// System.out.println("udpSocket output port=" + udpSocket.getLocalPort()); // diagnostic tells what port was chosen by system
+
+ if (isPacketIdEvenParity)
+ padding = " ";
+ else padding = "";
+
+ Thread.sleep(1000); // Send packets at rate of one per second
+ System.out.println("[" + UdpSender.class.getName() + "] " + MY_NAME + " " + sourceAddress +
+ " sent values(" + packetID + "," + value + ",\"" + message + "\"," + isPacketIdEvenParity +
+ ")" + padding + " as packet #" + index + " of " + TOTAL_PACKETS_TO_SEND);
+ baos.reset(); // clear the output stream after sending
+ }
+ }
+ catch (IOException | InterruptedException e)
+ {
+ System.err.println("Problem with UdpSender, see exception trace:");
+ System.err.println(e);
+ }
+ finally // clean up prior to exit, don't want to leave behind zombies
+ {
+ if (udpSocket != null)
+ udpSocket.close();
+
+ if (dos != null)
+ dos.close();
+ System.out.println(UdpSender.class.getName() + " complete."); // all done
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Goericke/TCPNumberReceiverUDPResultSender.java b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Goericke/TCPNumberReceiverUDPResultSender.java
new file mode 100644
index 0000000000000000000000000000000000000000..f9a58490506bf9d40d70cc31b3ce1bc758f87e24
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Goericke/TCPNumberReceiverUDPResultSender.java
@@ -0,0 +1,176 @@
+package MV3500Cohort2020JulySeptember.homework3.Goericke;
+
+import java.io.BufferedReader;
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+/**
+ * This class will be connected by an TCP sender over VPN (argon), calculating
+ * a result of an equation and send the result back via UDP over VPN.
+ * @date 08/17/2020
+ * @group Goericke/Weissenberger
+ */
+public class TCPNumberReceiverUDPResultSender {
+
+ // Change this to the port where the TCP server is listening
+ private static final int TCP_ARGON_SERVER_PORT = 2317;
+
+ /**
+ * @param args the command line arguments
+ */
+ public static void main(String[] args) {
+ try {
+
+ // ServerSocket waits for a connection from a client.
+ System.out.println("TCPNumberReceiver has started...");
+ ServerSocket serverSocket = new ServerSocket(TCP_ARGON_SERVER_PORT);
+ InetAddress remoteAddress;
+
+ // declare the stream and readers
+ InputStream inputStream;
+ InputStreamReader inputStreamReader;
+ BufferedReader bufferedReader;
+
+ // declare needed variables
+ String clientMessage;
+ int number1, number2;
+ String calculation_Method;
+ int iUDPResultReceivingPort;
+ // Server is up and waiting (i.e. "blocked" or paused)
+ // Loop, infinitely, waiting for client connections.
+ while (true) {
+
+ // block until connected to a client
+ try (Socket clientConnectionSocket = serverSocket.accept())
+ {
+ // Now hook everything up (i.e. set up the streams), Java style:
+ inputStream = clientConnectionSocket.getInputStream();
+ inputStreamReader = new InputStreamReader(inputStream);
+ bufferedReader = new BufferedReader(inputStreamReader);
+
+ // get the date from TCP packet
+ clientMessage = bufferedReader.readLine();
+ number1 = Integer.parseInt(bufferedReader.readLine());
+ number2 = Integer.parseInt(bufferedReader.readLine());
+ calculation_Method = bufferedReader.readLine();
+ iUDPResultReceivingPort = Integer.parseInt(bufferedReader.readLine());
+
+ // print them out (for debugging)
+ System.out.println("Message recived: "+clientMessage);
+ System.out.println("Number 1 recived: "+number1);
+ System.out.println("Number 2 recived: "+number2);
+ System.out.println("Calc Method recived: "+calculation_Method);
+ System.out.println("Send result to port: "+iUDPResultReceivingPort);
+ // get the sender IP (is used for sending UDP)
+ remoteAddress = clientConnectionSocket.getInetAddress();
+
+ System.out.println("Send result to IP: "+remoteAddress.getHostAddress());
+
+ // try to send the calculated result as a float via UDP...
+ sendResultViaUDP(calculateResult(number1, number2, calculation_Method), remoteAddress, iUDPResultReceivingPort);
+ }
+ }
+ } 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!");
+ }
+ }
+ }
+
+ /**
+ * send the result to Bernd 10x
+ * @param result
+ * @param inetAddress Bernd's IP
+ * @param port Bernd's UDP port number
+ * @throws IOException
+ */
+ private static void sendResultViaUDP(float result, InetAddress inetAddress, int port) throws IOException{
+ DatagramSocket udpSocket = null;
+ DataOutputStream dos = null;
+
+ try
+ {
+ // Create a UDP socket
+ udpSocket = new DatagramSocket(); // let system assign output port, then SENDING_PORT not needed
+
+ // Put together a message with binary content. "ByteArrayOutputStream"
+ // is a java.io utility that lets us put together an array of binary
+ // data, which we put into the UDP packet.
+
+ ByteArrayOutputStream baos = new ByteArrayOutputStream(1500); // how many bytes are in buffer? MTU=1500 is good
+ dos = new DataOutputStream(baos); // wrapper for writing values, connects both streams
+
+ // Put together a packet to send
+ // these types and order of variables must match on sender and receiver
+ byte[] byteArray = baos.toByteArray();
+
+ DatagramPacket datagramPacket = new DatagramPacket(byteArray, byteArray.length, inetAddress, port);
+
+ for (int index = 1; index <= 10; index++)
+ {
+ dos.writeFloat (result);
+ dos.flush(); // sends DataOutputStream to ByteArrayOutputStream
+ byteArray = baos.toByteArray(); // OK so go get the flushed result...
+ datagramPacket.setData(byteArray); // and put it in the packet...
+ udpSocket.send(datagramPacket); // and send it away. boom gone, nonblocking.
+
+ Thread.sleep(1000); // Send packets at rate of one per second
+ baos.reset(); // clear the output stream after sending
+ }
+ dos.close();
+ }
+ catch (IOException | InterruptedException e)
+ {
+ System.err.println("Problem with UdpSender, see exception trace:");
+ System.err.println(e);
+ }
+ finally // clean up prior to exit, don't want to leave behind zombies
+ {
+ if (udpSocket != null)
+ udpSocket.close();
+
+ if (dos != null)
+ dos.close();
+ }
+ }
+
+ /**
+ * calculates the result based on given numbers and operator
+ * @param n1 first number
+ * @param n2 second number
+ * @param operator
+ * @return the result as a float
+ */
+ private static float calculateResult(int n1, int n2, String operator){
+ float result = -1;
+ switch (operator) {
+ case "+":
+ result = n1 + n2;
+ break;
+ case "-":
+ result = n1 - n2;
+ break;
+ case "*":
+ result = n1 * n2;
+ break;
+ case "/":
+ result = n1 / n2;
+ break;
+ default:
+ System.err.println(operator +" is not a valid operator!");
+ break;
+ }
+ return result;
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Mahan/MahanUdpReceiver.java b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Mahan/MahanUdpReceiver.java
new file mode 100644
index 0000000000000000000000000000000000000000..7d7ca1757bf7b15d90f93c3d16e2f1fd5570ae38
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Mahan/MahanUdpReceiver.java
@@ -0,0 +1,84 @@
+package MV3500Cohort2020JulySeptember.homework3.Mahan;
+
+import java.io.*;
+import java.net.*;
+
+/**
+ *
+ * @author Bill
+ */
+public class MahanUdpReceiver
+{
+// public static final int SENDING_PORT = 1414; // port used by UdpSender, unneeded here
+ public static final int RECEIVING_PORT = 1415;
+ public static final String DESINATION_HOST = "10.1.105.12";
+
+ /**
+ * @param args the command line arguments
+ * @throws java.io.IOException
+ */
+ public static void main(String[] args) throws IOException
+ {
+ DatagramSocket udpSocket = null;
+
+ try
+ {
+ System.out.println(MahanUdpReceiver.class.getName() + " started...");
+
+ // Create a UDP socket
+ udpSocket = new DatagramSocket(RECEIVING_PORT);
+ udpSocket.setReceiveBufferSize(1500); // how many bytes are in buffer? MTU=1500 is good
+ udpSocket.setBroadcast(false); // we're just receiving here
+
+ byte[] byteArray = new byte[1500];
+ DatagramPacket receivePacket = new DatagramPacket(byteArray, byteArray.length);
+
+ ByteArrayInputStream bais = new ByteArrayInputStream(byteArray);
+ DataInputStream dis = new DataInputStream(bais);
+
+ boolean isEvenParity;
+ int packetCount = 0;
+ int firstInt;
+ float secondFloat;
+ String thirdString;
+ String padding;
+
+ // You need a new receiving packet to read from every packet received
+ while (true)
+ {
+ packetCount++; // good practice to increment counter at start of loop, when possible
+ udpSocket.receive(receivePacket); // blocks until packet is received
+
+ // values of interest follow. order and types of what was sent must match what you are reading!
+ firstInt = dis.readInt(); // packetID
+ secondFloat = dis.readFloat();
+ thirdString = dis.readUTF(); // string value with guaranteed encoding, matches UTF-8 is 8 bit
+ isEvenParity = dis.readBoolean(); // ok, we've gotten everything we're looking for.
+
+ dis.reset(); // now clear the input stream after reading, in preparation for next loop
+
+ if (isEvenParity)
+ padding = " ";
+ else padding = "";
+
+ System.out.println("[" + MahanUdpReceiver.class.getName() + "]" +
+ " packetID=" + firstInt + // have output message use same name as sender
+ ", second float value=" + secondFloat +
+ ", third String value=\"" + thirdString + "\"" + // note that /" is literal quote character
+ " isPacketIdEvenParity=" + isEvenParity + "," + padding +
+ " packet counter=" + packetCount);
+ }
+ }
+ catch(IOException e)
+ {
+ System.err.println("Problem with UdpReceiver, see exception trace:");
+ System.err.println(e);
+ }
+ finally // clean up prior to exit, don't want to leave behind zombie socket
+ {
+ if (udpSocket != null)
+ udpSocket.close();
+ System.out.println(MahanUdpReceiver.class.getName() + " complete."); // all done
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Mahan/MahanUdpSender.java b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Mahan/MahanUdpSender.java
new file mode 100644
index 0000000000000000000000000000000000000000..199cbd5217bd2e9ce943a7df983686dc3ed3a474
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Mahan/MahanUdpSender.java
@@ -0,0 +1,106 @@
+package MV3500Cohort2020JulySeptember.homework3.Mahan;
+
+import java.io.*;
+import java.net.*;
+
+/**
+ *
+ * @author Bill
+ */
+public class MahanUdpSender
+{
+ // System properties: https://docs.oracle.com/javase/tutorial/essential/environment/sysprop.html
+ public static final String MY_NAME = System.getProperty("user.name"); // guru incantation 8)
+// public static final int SENDING_PORT = 1414; // not needed, can let system choose an open local port
+ public static final int RECEIVING_PORT = 1415;
+ public static final int TOTAL_PACKETS_TO_SEND = 100;
+
+ // here is what we need for lab comms
+ public static final String DESTINATION_HOST = "10.1.105.12"; // localhost 127.0.0.1 or argon 10.1.105.1 or 10.1.105.1 or whatever
+
+ @SuppressWarnings("SleepWhileInLoop")
+ public static void main(String[] args) throws IOException
+ {
+ DatagramSocket udpSocket = null;
+ DataOutputStream dos = null;
+ int packetID = 0; // counter variable to send in packet
+ float value = -1.0f; // unreachable value is good sentinel to ensure expected changes occur
+ String message = MY_NAME + " says I see you Chris"; // no really
+ String padding = new String();
+
+ try
+ {
+ System.out.println(MahanUdpSender.class.getName() + " shows how to send simple-type values via DataOutputStream");
+ System.out.println(MahanUdpSender.class.getName() + " started...");
+
+ // Create a UDP socket
+ udpSocket = new DatagramSocket(); // let system assign output port, then SENDING_PORT not needed
+
+ // Put together a message with binary content. "ByteArrayOutputStream"
+ // is a java.io utility that lets us put together an array of binary
+ // data, which we put into the UDP packet.
+
+ ByteArrayOutputStream baos = new ByteArrayOutputStream(1500); // how many bytes are in buffer? MTU=1500 is good
+ dos = new DataOutputStream(baos); // wrapper for writing values, connects both streams
+
+ // Put together a packet to send
+ // these types and order of variables must match on sender and receiver
+ byte[] byteArray = baos.toByteArray();
+
+ // ID of the host we are sending to
+ InetAddress destinationAddress = InetAddress.getByName(DESTINATION_HOST);
+ // ID of the host we are sending from
+ InetAddress sourceAddress = InetAddress.getByName("localhost"); // possibly identical if source not modified
+
+ DatagramPacket datagramPacket = new DatagramPacket(byteArray, byteArray.length, destinationAddress, RECEIVING_PORT);
+
+ // Hmmm, how fast does UDP stream go? Does UDP effectively slow packets down, or does
+ // this cause network problems? (hint: yes for an unlimited send rate, unlike TCP).
+ // How do you know on the receiving side that you haven't received a
+ // duplicate UDP packet, out-of-order packet, or dropped packet? your responsibility.
+
+ for (int index = 1; index <= TOTAL_PACKETS_TO_SEND; index++) // avoid infinite send loops in code, they can be hard to kill!
+ {
+ packetID++; // increment counter, prefer using explicit value to index
+ value = TOTAL_PACKETS_TO_SEND - packetID; // countdown
+ boolean isPacketIdEvenParity = ((packetID % 2) == 0); // % is modulo operator; result 0 is even parity, 1 is odd parity
+
+ // values of interest follow. order and types of what was sent must match what you are reading!
+ dos.writeInt (packetID);
+ dos.writeFloat (value);
+ dos.writeUTF (message); // string value with guaranteed encoding, matches UTF-8 is 8 bit
+ dos.writeBoolean(isPacketIdEvenParity);
+
+ dos.flush(); // sends DataOutputStream to ByteArrayOutputStream
+ byteArray = baos.toByteArray(); // OK so go get the flushed result...
+ datagramPacket.setData(byteArray); // and put it in the packet...
+ udpSocket.send(datagramPacket); // and send it away. boom gone, nonblocking.
+// System.out.println("udpSocket output port=" + udpSocket.getLocalPort()); // diagnostic tells what port was chosen by system
+
+ if (isPacketIdEvenParity)
+ padding = " ";
+ else padding = "";
+
+ Thread.sleep(1000); // Send packets at rate of one per second
+ System.out.println("[" + MahanUdpSender.class.getName() + "] " + MY_NAME + " " + sourceAddress +
+ " sent values(" + packetID + "," + value + ",\"" + message + "\"," + isPacketIdEvenParity +
+ ")" + padding + " as packet #" + index + " of " + TOTAL_PACKETS_TO_SEND);
+ baos.reset(); // clear the output stream after sending
+ }
+ }
+ catch (IOException | InterruptedException e)
+ {
+ System.err.println("Problem with UdpSender, see exception trace:");
+ System.err.println(e);
+ }
+ finally // clean up prior to exit, don't want to leave behind zombies
+ {
+ if (udpSocket != null)
+ udpSocket.close();
+
+ if (dos != null)
+ dos.close();
+ System.out.println(MahanUdpSender.class.getName() + " complete."); // all done
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Mahan/receiving screenshot.png b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Mahan/receiving screenshot.png
new file mode 100644
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Mahan/sendingscreenshot.png b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Mahan/sendingscreenshot.png
new file mode 100644
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/README.md b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/README.md
index 0144d62d033fbe094ceac7a6d1bedc12d3c158b0..3ec21e2b976a5937ab94a80cb4028ccb79441eae 100644
--- a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/README.md
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/README.md
@@ -10,3 +10,30 @@ References include
* [assignments source subdirectories](../../../../../assignments/src) show examples from previous cohorts.
Questions and innovation are always welcome, good luck!
+
+
+
+**************************************************
+Project for HW #3
+Team: "Germany" (Stefan and Bernd)
+**************************************************
+
+
+
+This program(s) do(es) the following:
+- send two numbers, a mathematical operator and a port number over VPN to a TCP receiver
+- the TCP receiver calculates the result and send it back to the sender over VPN using UDP!
+- the UDP receiver shows the result
+
+The main focus was to send via TCP over a VPN, do something and send the result back via UDP.
+
+How to run the project:
+0. connect both computer with the argon net
+1. run UDPResultReceiver on Bernd's computer
+2. run TCPNumberReceiverUDPResultSender on Stefan's computer
+3. find Stefan's IP within the argon net
+4. change the TCP_ARGON_SERVER_IP in class TCPNumberSender to Stefan's IP.
+5. run TCPNumberSender
+
+(you can edit the numbers and run TCPNumberSender multiple times...)
+
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/Screenshots.docx b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/Screenshots.docx
new file mode 100644
index 0000000000000000000000000000000000000000..ccb72d8a6b6bf96522119ec8837209f50fba9496
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/TCPNumberSender.java b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/TCPNumberSender.java
new file mode 100644
index 0000000000000000000000000000000000000000..8985ce40b6af5f0cbf8a5a2f3a183fa3edd20bef
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/TCPNumberSender.java
@@ -0,0 +1,97 @@
+
+package MV3500Cohort2020JulySeptember.homework3.Weissenberger;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.net.Socket;
+
+/**
+ * This class will connect to an TCP receiver over VPN (argon) and send
+ * two numbers
+ * @date 08/17/2020
+ * @author Loki
+ * @group Weissenberger/Goericke
+ */
+public class TCPNumberSender {
+
+ // Change this to the IP address of the TCP server 10.1.105.9 (127.0.0.1 just for testing)
+ private static final String TCP_ARGON_SERVER_IP = "127.0.0.1";
+ // Change this to the port where the TCP server is listening
+ private static final int TCP_ARGON_SERVER_PORT = 2317;
+ // Where the result should be posted (port)
+ private static final int UDP_ARGON_RECEIVING_PORT = 1415;
+
+ private static final int NUMBER1 = 16;
+ private static final int NUMBER2 = 2;
+ private static final String CALCULATION_METHOD = "-";
+
+ // how many times should the number being sent
+ private static final int REPETITION = 1;
+ private static int counter = 0;
+
+ public static void main(String[] args) throws InterruptedException {
+
+ // Local variables
+ Socket socket;
+ OutputStream outputStream;
+ PrintStream printStream;
+
+ try {
+ while (counter < REPETITION){
+ // increment the counter
+ counter++;
+ System.out.println("Homwork 3: TcpNumberSender creating socket over VPN...");
+
+ // We request an IP to connect to "TCP_ARGON_SERVER_IP" over
+ // the argon VPN and port number at that IP "TCP_ARGON_SERVER_PORT".
+ // This establishes a connection to that IP in the form of a Socket
+ // object.
+ socket = new Socket(TCP_ARGON_SERVER_IP, TCP_ARGON_SERVER_PORT); // locohost?
+
+
+ // instanciate the streams:
+ outputStream = socket.getOutputStream();
+ printStream = new PrintStream(outputStream);
+ // send a first text to server
+ printStream.println("This is message from client.");
+ printStream.flush();
+ // wait 1 second
+ Thread.sleep(1000);
+
+ // sending number 1
+ printStream.println(NUMBER1);
+ // sending number 2
+ printStream.println(NUMBER2);
+ // sending calc method
+ printStream.println(CALCULATION_METHOD);
+ // sending the port where the result should be send to
+ printStream.println(UDP_ARGON_RECEIVING_PORT);
+ printStream.flush();
+ // wait 1 second
+ Thread.sleep(1000);
+
+ System.out.println("==================================================");
+ System.out.println(NUMBER1+" and "+NUMBER2+" were sent to server. Calculating method was: "+CALCULATION_METHOD);
+
+ // close TCP socket to server
+ socket.close();
+ } // end while(true)
+ }
+ catch (IOException e)
+ {
+ System.err.println("Problem with TCPNumberSender networking:");
+ System.err.println("Error: " + e);
+
+ if (e instanceof java.net.BindException) {
+ System.err.println("*** Be sure to stop any other running instances of programs using this port: "+TCP_ARGON_SERVER_PORT);
+ }
+ }
+ finally // occurs after any other activity when shutting down
+ {
+ System.out.println();
+ System.out.println("TCPNumberSender exit");
+ }
+ }
+
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/UDPResultReceiver.java b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/UDPResultReceiver.java
new file mode 100644
index 0000000000000000000000000000000000000000..8a348e72d82e6c0861d02896e489f24faa9239e1
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/UDPResultReceiver.java
@@ -0,0 +1,71 @@
+
+package MV3500Cohort2020JulySeptember.homework3.Weissenberger;
+
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+
+/**
+ * This class will be connected by an UDP sender over VPN (argon)
+ * @date 08/17/2020
+ * @author Loki
+ * @group Weissenberger/Goericke
+ */
+public class UDPResultReceiver {
+
+ public static final int RECEIVING_PORT = 1415;
+
+ /**
+ * @param args the command line arguments
+ * @throws java.io.IOException
+ */
+ public static void main(String[] args) throws IOException
+ {
+ DatagramSocket udpSocket = null;
+
+ try
+ {
+ System.out.println(UDPResultReceiver.class.getName() + " started...");
+
+ // Create a UDP socket
+ udpSocket = new DatagramSocket(RECEIVING_PORT);
+ udpSocket.setReceiveBufferSize(1500); // how many bytes are in buffer? MTU=1500 is good
+ udpSocket.setBroadcast(false); // we're just receiving here
+
+ byte[] byteArray = new byte[1500];
+ DatagramPacket receivePacket = new DatagramPacket(byteArray, byteArray.length);
+
+ ByteArrayInputStream bais = new ByteArrayInputStream(byteArray);
+ DataInputStream dis = new DataInputStream(bais);
+
+ float result;
+
+ // You need a new receiving packet to read from every packet received
+ while (true)
+ {
+ udpSocket.receive(receivePacket); // blocks until packet is received
+
+ result = dis.readFloat();
+
+ dis.reset(); // now clear the input stream after reading, in preparation for next loop
+
+ System.out.println("Calculated result: "+result);
+
+ }
+ }
+ catch(IOException e)
+ {
+ System.err.println("Problem with UdpReceiver, see exception trace:");
+ System.err.println(e);
+ }
+ finally // clean up prior to exit, don't want to leave behind zombie socket
+ {
+ if (udpSocket != null)
+ udpSocket.close();
+ System.out.println(UDPResultReceiver.class.getName() + " complete."); // all done
+ }
+ }
+
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/logic.jpg b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/logic.jpg
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/logic.vsdx b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/logic.vsdx
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/sequence.jpg b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/sequence.jpg
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diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/sequence.vsdx b/assignments/src/MV3500Cohort2020JulySeptember/homework3/Weissenberger/sequence.vsdx
new file mode 100644
index 0000000000000000000000000000000000000000..c43b2fe02d509af09eead57cd0180a2e5d5f1567
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diff --git a/examples/src/HttpServletExamples/HttpWebPageSource.java b/examples/src/HttpServletExamples/HttpWebPageSource.java
index 34f51cfb7397db064e1676071d1910f516f75ce9..97166ba5a0593ae53b1276d4e4377f454281d2cc 100644
--- a/examples/src/HttpServletExamples/HttpWebPageSource.java
+++ b/examples/src/HttpServletExamples/HttpWebPageSource.java
@@ -27,9 +27,13 @@ public class HttpWebPageSource {
// We request an IP to connect to a web server running on default http port 80.
- String WEB_ADDRESS = "www.nps.edu";
- System.out.println("New socket WEB_ADDRESS=" + WEB_ADDRESS);
- Socket socket = new Socket(WEB_ADDRESS, 80); // compare alternative: https on port 443
+ String WEB_SERVER_ADDRESS = "www.nps.edu";
+ int WEB_SERVER_PORT_HTTP = 80;
+ int WEB_SERVER_PORT_HTTPS = 443; // does this work too?
+ System.out.println("New socket WEB_ADDRESS=" + WEB_SERVER_ADDRESS);
+
+ // this Java construct will work for HTTP but not HTTPS
+ Socket socket = new Socket(WEB_SERVER_ADDRESS, WEB_SERVER_PORT_HTTPS); // compare alternative: https on port 443
// we send a command to the web server, asking for what
// we want. Note that the format for the command is very
diff --git a/examples/src/HttpServletExamples/HttpWebPageSourceTerminalLog.txt b/examples/src/HttpServletExamples/HttpWebPageSourceTerminalLog.txt
index 896fb30c8a6329cb407929eec9a835ac16839a6d..9deeef11d9aede321dc7ed17c0795449fbb134d7 100644
--- a/examples/src/HttpServletExamples/HttpWebPageSourceTerminalLog.txt
+++ b/examples/src/HttpServletExamples/HttpWebPageSourceTerminalLog.txt
@@ -31,3 +31,34 @@ GET /index.html HTTP/1.0
15: </body></html>
HttpWebPageSource: response finished
BUILD SUCCESSFUL (total time: 2 seconds)
+
+now using https to port 443:
+
+run-single:
+HttpWebPageSource: create http connection and retrieve default page
+Reference: https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol
+Reference: https://tools.ietf.org/html/rfc7230
+Reference: https://en.wikipedia.org/wiki/CURL
+
+New socket WEB_ADDRESS=www.nps.edu
+GET /index.html HTTP/1.0
+
+1: HTTP/1.1 400 Bad Request
+2: Date: Mon, 17 Aug 2020 18:25:20 GMT
+3: Server: Apache
+4: Content-Length: 362
+5: Connection: close
+6: Content-Type: text/html; charset=iso-8859-1
+7:
+8: <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
+9: <html><head>
+10: <title>400 Bad Request</title>
+11: </head><body>
+12: <h1>Bad Request</h1>
+13: <p>Your browser sent a request that this server could not understand.<br />
+14: Reason: You're speaking plain HTTP to an SSL-enabled server port.<br />
+15: Instead use the HTTPS scheme to access this URL, please.<br />
+16: </p>
+17: </body></html>
+HttpWebPageSource: response finished
+BUILD SUCCESSFUL (total time: 2 seconds)
diff --git a/examples/src/HttpServletExamples/JavaServletArchitecture.pdf b/examples/src/HttpServletExamples/JavaServletArchitecture.pdf
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diff --git a/examples/src/UdpMulticastExamples/UdpSender.java b/examples/src/UdpMulticastExamples/UdpSender.java
index 7005073ec0105f06141f35a5d4c4787bdc19dc96..8a658e878bb7ec212e666fc5ebeeea6b51617312 100644
--- a/examples/src/UdpMulticastExamples/UdpSender.java
+++ b/examples/src/UdpMulticastExamples/UdpSender.java
@@ -20,10 +20,12 @@ public class UdpSender
{
// System properties: https://docs.oracle.com/javase/tutorial/essential/environment/sysprop.html
public static final String MY_NAME = System.getProperty("user.name"); // guru incantation 8)
- public static final int SENDING_PORT = 1414;
+// public static final int SENDING_PORT = 1414; // not needed, can let system choose an open local port
public static final int RECEIVING_PORT = 1415;
public static final int TOTAL_PACKETS_TO_SEND = 100;
- public static final String DESTINATION_HOST = "localhost"; // localhost 127.0.0.1 or argon 10.1.105.1
+
+ // here is what we need for lab comms
+ public static final String DESTINATION_HOST = "10.1.105.16"; // localhost 127.0.0.1 or argon 10.1.105.1 or 10.1.105.1 or whatever
@SuppressWarnings("SleepWhileInLoop")
public static void main(String[] args) throws IOException
@@ -32,8 +34,8 @@ public class UdpSender
DataOutputStream dos = null;
int packetID = 0; // counter variable to send in packet
float value = -1.0f; // unreachable value is good sentinel to ensure expected changes occur
- String message = "Hello from " + MY_NAME; // no really
- String padding;
+ String message = MY_NAME + " says Hello MV3500"; // no really
+ String padding = new String();
try
{
@@ -41,7 +43,7 @@ public class UdpSender
System.out.println(UdpSender.class.getName() + " started...");
// Create a UDP socket
- udpSocket = new DatagramSocket();
+ udpSocket = new DatagramSocket(); // let system assign output port, then SENDING_PORT not needed
// Put together a message with binary content. "ByteArrayOutputStream"
// is a java.io utility that lets us put together an array of binary
@@ -68,8 +70,8 @@ public class UdpSender
for (int index = 1; index <= TOTAL_PACKETS_TO_SEND; index++) // avoid infinite send loops in code, they can be hard to kill!
{
- packetID++; // increment counter, prefer using explicit value to index
- value = 100 - packetID; // countdown
+ packetID++; // increment counter, prefer using explicit value to index
+ value = TOTAL_PACKETS_TO_SEND - packetID; // countdown
boolean isPacketIdEvenParity = ((packetID % 2) == 0); // % is modulo operator; result 0 is even parity, 1 is odd parity
// values of interest follow. order and types of what was sent must match what you are reading!
@@ -82,6 +84,7 @@ public class UdpSender
byteArray = baos.toByteArray(); // OK so go get the flushed result...
datagramPacket.setData(byteArray); // and put it in the packet...
udpSocket.send(datagramPacket); // and send it away. boom gone, nonblocking.
+// System.out.println("udpSocket output port=" + udpSocket.getLocalPort()); // diagnostic tells what port was chosen by system
if (isPacketIdEvenParity)
padding = " ";