Initial commit

Solved echo praktikum

.gitignore

@@ -0,0 +1,3 @@
+/VAR-UDP/.idea
+/VAR-UDP/bin
+/VAR-UDP/.settings

VAR-UDP/.checkstyle

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<fileset-config file-format-version="1.2.0" simple-config="true" sync-formatter="false">
+  <fileset name="all" enabled="true" check-config-name="Google Checks" local="false">
+    <file-match-pattern match-pattern="." include-pattern="true"/>
+  </fileset>
+</fileset-config>

VAR-UDP/.classpath

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

VAR-UDP/.project

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>VAR-UDP</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

VAR-UDP/src/var/sockets/udp/echo/EchoClient.java

@@ -0,0 +1,35 @@
+package var.sockets.udp.echo;
+
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.SocketTimeoutException;
+
+class EchoClient {
+  private static final String HOST = "localhost";
+  private static final int PORT = 4711;
+  private static final int BUFSIZE = 512;
+  private static final int TIMEOUT = 2000;
+
+  public static void main(String[] args) {
+      System.out.printf("Sending: %s - len: %d\n", args[0], args[0].length());
+    byte[] data = args[0].getBytes();
+    try (DatagramSocket socket = new DatagramSocket()) {
+      socket.setSoTimeout(TIMEOUT); // Zeit in ms, für wie lange ein read() auf socket blockiert.
+                                    // Bei timeout is java.net.SocketTimeoutException (TIMEOUT == 0
+                                    // => blockiert für immer)
+      InetAddress iaddr = InetAddress.getByName(HOST);
+      DatagramPacket packetOut = new DatagramPacket(data, data.length, iaddr, PORT);
+      socket.send(packetOut);
+      DatagramPacket packetIn = new DatagramPacket(new byte[BUFSIZE], BUFSIZE);
+
+      socket.receive(packetIn);
+      String received = new String(packetIn.getData(), 0, packetIn.getLength());
+      System.out.println("Received: " + received);
+    } catch (SocketTimeoutException e) {
+      System.err.println("Timeout: " + e.getMessage());
+    } catch (Exception e) {
+      System.err.println(e);
+    }
+  }
+}

VAR-UDP/src/var/sockets/udp/echo/EchoServer.java

@@ -0,0 +1,36 @@
+package var.sockets.udp.echo;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.util.Arrays;
+
+class EchoServer {
+  private static final int PORT = 4711;
+  private static final int BUFSIZE = 512;
+
+  public static void main(final String[] args) {
+    try (DatagramSocket socket = new DatagramSocket(PORT)) {
+      DatagramPacket packetIn = new DatagramPacket(new byte[BUFSIZE], BUFSIZE);
+      DatagramPacket packetOut = new DatagramPacket(new byte[BUFSIZE], BUFSIZE);
+
+      System.out.println("Server gestartet ...");
+
+      while (true) {
+        System.out.println("\nListening: ");
+        socket.receive(packetIn);
+        System.out.println(
+            "Received: " + packetIn.getLength() + " bytes: " + new String(packetIn.getData()));
+
+        packetOut.setSocketAddress(packetIn.getSocketAddress());
+          System.out.printf("About to send: %d bytes: %s\n", packetIn.getData().length, new String(packetIn.getData()));
+        packetOut.setData(packetIn.getData());
+        packetOut.setLength(packetIn.getLength());
+        // mehr Eigenschaften von packetOut setzen...
+        socket.send(packetOut);
+      }
+    } catch (IOException e) {
+      System.err.println(e);
+    }
+  }
+}

VAR-UDP/src/var/sockets/udp/messwerte/MesswertClient.java

@@ -0,0 +1,22 @@
+package var.sockets.udp.messwerte;
+
+import java.util.Date;
+import java.util.Random;
+
+public class MesswertClient {
+
+  public static void main(String[] args) {
+    Random rg = new Random();
+    try {
+      // ...
+      while (true) {
+        String jetzt = (new Date()).toString();
+        String messung = Double.toString(rg.nextDouble() * 100.0);
+        // ...
+        Thread.sleep(5000);
+      }
+    } catch (Exception e) {
+      System.err.println(e);
+    }
+  }
+}

VAR-UDP/src/var/sockets/udp/messwerte/MesswertServer.java

@@ -0,0 +1,8 @@
+package var.sockets.udp.messwerte;
+
+public class MesswertServer {
+
+  public static void main(String[] args) {
+    // TODO Auto-generated method stub
+  }
+}

VAR-UDP/src/var/sockets/udp/time/TimeClient.java

@@ -0,0 +1,8 @@
+package var.sockets.udp.time;
+
+public class TimeClient {
+
+  public static void main(String[] args) {
+    // TODO Auto-generated method stub
+  }
+}

VAR-UDP/src/var/sockets/udp/time/TimeServer.java

@@ -0,0 +1,8 @@
+package var.sockets.udp.time;
+
+public class TimeServer {
+
+  public static void main(String[] args) {
+    // TODO Auto-generated method stub
+  }
+}