Add RARP opcodes to ARP.java.

src/main/java/net/floodlightcontroller/core/IOFMessageListener.java

@@ -30,7 +30,7 @@ public interface IOFMessageListener extends IListener<OFType> {
    * This is the method Floodlight uses to call listeners with OpenFlow messages
    * @param sw the OpenFlow switch that sent this message
    * @param msg the message
-   * @param cntx a floodlight message context object you can use to pass 
+   * @param cntx a Floodlight message context object you can use to pass 
    * information between listeners
    * @return the command to continue or stop the execution
    */

src/main/java/net/floodlightcontroller/packet/ARP.java

@@ -31,6 +31,8 @@ public class ARP extends BasePacket {
 
     public static short OP_REQUEST = 0x1;
     public static short OP_REPLY = 0x2;
+    public static short OP_RARP_REQUEST = 0x3;
+    public static short OP_RARP_REPLY = 0x4;
 
     protected short hardwareType;
     protected short protocolType;