Merge origin/master

deliverables/src/MV3500Cohort2018JulySeptember/homework3/Loeffelman_Severson_Homework3/LoeffelmanSeversonMulticastImageHw3Receiver.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package MV3500Cohort2018JulySeptember.homework3.Loeffelman_Severson_Homework3;
+
+import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import static java.lang.System.in;
+import java.net.DatagramPacket;
+import java.net.InetAddress;
+import java.net.MulticastSocket;
+import javax.imageio.ImageIO;
+import javax.swing.ImageIcon;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+
+/**
+ *
+ * @author garrettloeffelman
+ */
+public class LoeffelmanSeversonMulticastImageHw3Receiver {
+
+    
+    public static final String MULTICAST_ADDRESS = "239.1.2.15";
+    public static final int DESTINATION_PORT = 1717;
+    /** How many routers can be crossed */
+    public static final int TTL = 10; 
+    
+    public static void main(String[] args) 
+    {
+        try
+        {
+        
+            // This is a java/IPv6 problem. You should also add it to the
+            // arguments used to start the app, eg -Djava.net.preferIPv4Stack=true
+            // set in the "run" section of preferences. Also, typically
+            // netbeans must be restarted after these settings.
+            // https://stackoverflow.com/questions/18747134/getting-cant-assign-requested-address-java-net-socketexception-using-ehcache
+            System.setProperty("java.net.preferIPv4Stack", "true");
+            
+            
+            MulticastSocket multicastSocket = new MulticastSocket(DESTINATION_PORT);
+            multicastSocket.setTimeToLive(TTL);
+            InetAddress multicastAddress = InetAddress.getByName(MULTICAST_ADDRESS);
+            System.out.println(multicastAddress);            
+            // Join group useful on receiving side
+            multicastSocket.joinGroup(multicastAddress);
+            // You can join multiple groups here
+            
+            int count = 0;
+            Image image = null;
+            
+            while(true)
+            {
+                byte[] packetArray = new byte[100000];
+                DatagramPacket packet = new DatagramPacket(packetArray, packetArray.length);
+                
+                multicastSocket.receive(packet);
+                count++;
+                
+                ByteArrayInputStream bais = new ByteArrayInputStream(packet.getData());
+                BufferedImage bimage = ImageIO.read(bais);
+                
+                if(!multicastSocket.isConnected()){
+                    image = bimage;
+                    break;
+                }
+            }
+                    JFrame frame = new JFrame();
+                    frame.setSize(300, 300);
+                    JLabel label = new JLabel(new ImageIcon(image));
+                    frame.add(label);
+                    frame.setVisible(true);
+
+        }
+        catch(Exception e)
+        {
+            System.out.println(e);
+        }
+    }
+    
+}

deliverables/src/MV3500Cohort2018JulySeptember/homework3/Loeffelman_Severson_Homework3/LoeffelmanSeversonMulticastImageHw3Sender.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package MV3500Cohort2018JulySeptember.homework3.Loeffelman_Severson_Homework3;
+
+import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.net.DatagramPacket;
+import java.net.InetAddress;
+import java.net.MulticastSocket;
+import java.net.URL;
+import javax.imageio.ImageIO;
+
+/**
+ *
+ * @author garrettloeffelman
+ */
+public class LoeffelmanSeversonMulticastImageHw3Sender {
+
+    public static final String MULTICAST_ADDRESS = "239.1.2.15";
+    public static final int DESTINATION_PORT = 1717;
+    /** How many routers can be crossed */
+    public static final int TTL = 10; 
+    
+    public static void main(String[] args) 
+    {
+        try
+        {
+            // This is a java/IPv6 problem. You should also add it to the
+            // arguments used to start the app, eg -Djava.net.preferIPv4Stack=true
+            // set in the "run" section of preferences. Also, typically
+            // netbeans must be restarted after these settings.
+            // https://stackoverflow.com/questions/18747134/getting-cant-assign-requested-address-java-net-socketexception-using-ehcache
+            System.setProperty("java.net.preferIPv4Stack", "true");
+            
+            
+            MulticastSocket multicastSocket = new MulticastSocket(1718);
+            multicastSocket.setTimeToLive(TTL);
+            InetAddress multicastAddress = InetAddress.getByName(MULTICAST_ADDRESS);
+            System.out.println(multicastAddress);            
+            // Join group useful on receiving side
+            multicastSocket.joinGroup(multicastAddress);
+            // You can join multiple groups here
+            URL url = new URL("https://cdn1.iconfinder.com/data/icons/cute-monkey-emoticon/595/MONKEY_EMOTICON-05-512.png");
+            // 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.
+            BufferedImage image = ImageIO.read(url);
+            ByteArrayOutputStream baos = new ByteArrayOutputStream();
+            ImageIO.write(image, "png", baos);
+            byte[] buffer = baos.toByteArray();
+            //String encodedImage = Base64.encode(baos.toByteArray());
+            // Put together a packet to send
+            
+            // muticast group we are sending to--not a single host
+            
+            DatagramPacket packet = new DatagramPacket(buffer, buffer.length, multicastAddress, DESTINATION_PORT);
+       
+            // How fast does this go? Does UDP try to slow it 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?
+            
+            for(int idx = 0; idx < buffer.length; idx++)
+            {
+               multicastSocket.send(packet);
+               System.out.println("Sent multicast packet " + idx);
+            }
+        }
+        catch(Exception e)
+        {
+            System.out.println(e);
+        }
+    }
+    
+}