Added comments

09/09/2020

assignments/src/MV3500Cohort2020JulySeptember/homework4/WeissenbergerGoericke/GermanyEspduReceiverEspduVPNSender.java

@@ -75,6 +75,7 @@ public class GermanyEspduReceiverEspduVPNSender {
                     pduCount++;
                     String receiptMessage = String.format("%3s", pduCount) // right justify, 3 characters
                             + ". received PDU type " + aPdu.getPduType().getValue() + "=" + aPdu.getPduType().name() + " " + aPdu.getClass().getName();
+                    // only handle ESPDU at this point (no fire PDU etc...)
                     if (aPdu instanceof EntityStatePdu) {
                         System.out.println(receiptMessage);
                         EntityID entityID = ((EntityStatePdu) aPdu).getEntityID();
@@ -96,6 +97,10 @@ public class GermanyEspduReceiverEspduVPNSender {
         System.out.println(TRACE_PREFIX + "complete.");
     } // end main
     
+    /**
+     * gets the espdu from main and send it to VPN_RECEIVER_ADDRESS
+     * @param espdu 
+     */
     public static void sendESPDU(EntityStatePdu espdu) {
         MulticastSocket socket = null; // must be initialized, even if null
         InetAddress destinationIp = null; // must be initialized, even if null
@@ -114,7 +119,7 @@ public class GermanyEspduReceiverEspduVPNSender {
         }
 
         Set<InetAddress> broadcastAddresses;
-        // Loop through sending N ESPDUs
+        // Loop through sending one ESPDUs
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         DataOutputStream dos = new DataOutputStream(baos);
         try {