Initial redesign of internal data structures
diff --git a/model/ccnx.h b/model/ccnx.h
index 41e950a..573a567 100644
--- a/model/ccnx.h
+++ b/model/ccnx.h
@@ -142,7 +142,8 @@
       NO_FACES,    // Interests
       NON_DUPLICATED, // Nacks
       AFTER_SATISFIED, // Nacks
-      UNSOLICITED      // data
+      UNSOLICITED,      // data
+      PIT_LIMIT         // PIT limit reached
     };
   
 protected: