[ndnSIM] fw: Add signals to monitor Hits/Misses of the CS

Change-Id: Ifde5ce3311716ffa1aecc7312704328ac0447ae7
diff --git a/daemon/fw/forwarder.hpp b/daemon/fw/forwarder.hpp
index a96448b..826c79a 100644
--- a/daemon/fw/forwarder.hpp
+++ b/daemon/fw/forwarder.hpp
@@ -142,6 +142,14 @@
    */
   signal::Signal<Forwarder, pit::Entry> beforeExpirePendingInterest;
 
+  /** \brief Signals when the incoming interest pipeline gets a hit from the content store
+   */
+  signal::Signal<Forwarder, Interest, Data> afterCsHit;
+
+  /** \brief Signals when the incoming interest pipeline gets a miss from the content store
+   */
+  signal::Signal<Forwarder, Interest> afterCsMiss;
+
 PUBLIC_WITH_TESTS_ELSE_PRIVATE: // pipelines
   /** \brief incoming Interest pipeline
    *  \param interest the incoming Interest, must be well-formed and created with make_shared