Three way handshake implemented client and server side and functioning

Server generates a new Id for connections (Size of connections + 1)
Client now stores an id allocated to it by the server
The id is currently being saved in the clientToServer thread client side

tags: #story[987] #implement

src/main/java/seng302/client/ClientToServerThread.java

@@ -17,12 +17,15 @@ import seng302.server.messages.Message;
  */
 public class ClientToServerThread implements Runnable {
 
+    private static final int LOG_LEVEL = 1;
+
     private Thread thread;
 
+    private Integer ourID;
+
     private Socket socket;
     private InputStream is;
     private OutputStream os;
-    private static final int LOG_LEVEL = 1;
 
     private Boolean updateClient = true;
     private  ByteArrayOutputStream crcBuffer;
@@ -36,6 +39,16 @@ public class ClientToServerThread implements Runnable {
             e.printStackTrace();
         }
 
+        Integer allocatedID = threeWayHandshake();
+        if (allocatedID != null) {
+            ourID = allocatedID;
+            clientLog("Successful handshake. Allocated ID: " + ourID, 1);
+        } else {
+            clientLog("Unsuccessful handhsake", 1);
+            closeSocket();
+            return;
+        }
+
         thread = new Thread(this);
         thread.start();
 
@@ -96,6 +109,33 @@ public class ClientToServerThread implements Runnable {
 
     }
 
+
+    /**
+     * Listens for an allocated sourceID and returns it to the server if recieved
+     * @return the sourceID allocated to us by the server
+     */
+    private Integer threeWayHandshake() {
+        Integer ourSourceID = null;
+        while (true) {
+            try {
+                ourSourceID = is.read();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+            if (ourSourceID != null) {
+                try {
+                    os.write(ourSourceID);
+                    return ourSourceID;
+                } catch (IOException e) {
+                    e.printStackTrace();
+                    return null;
+                }
+            }
+        }
+    }
+
+
+
     /**
      * Send the post-start race course information
      */