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--- a/src/DIF/RIB/RIBdBase.h
+++ b/src/DIF/RIB/RIBdBase.h
@@ -23,6 +23,8 @@
 #include "Flow.h"
 #include "CDAPMessage_m.h"
 #include "PDUFTGUpdate.h"
+#include "CongestionDescriptor.h"
+
 
 class RIBdBase : public cSimpleModule {
   public:
@@ -41,6 +43,8 @@
     /* Handles information coming from PDUFTG module. */
     virtual void receiveForwardingInfoUpdateFromPDUFTG(PDUFTGUpdate * flow) = 0;
 
+    virtual void sendCongestionNotification(PDU* pdu) = 0;
+
     const Address& getMyAddress() const;
 
   protected:
@@ -51,6 +55,7 @@
     virtual void handleMessage(cMessage *msg) = 0;
 
     void initMyAddress();
+    long getNewInvokeId();
 
 };