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assignments/src/MV3500Cohort2020JulySeptember/homework4/Goericke/README.md deleted 100644 → 0
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## 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!
assignments/src/MV3500Cohort2020JulySeptember/homework4/Weissenberger/README.md deleted 100644 → 0
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## 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!
assignments/src/MV3500Cohort2020JulySeptember/homework4/Weissenberger/TCPReceiverVPNBridge.java deleted 100644 → 0
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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!");
}
}
}
}
assignments/src/MV3500Cohort2020JulySeptember/homework4/Weissenberger/TcpServerForFinal.java deleted 100644 → 0
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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!");
}
}
}
}
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