diff --git a/daemon/face/face.hpp b/daemon/face/face.hpp
index 8022e3d..f014545 100644
--- a/daemon/face/face.hpp
+++ b/daemon/face/face.hpp
@@ -17,10 +17,12 @@
  */
 typedef int FaceId;
 
+const std::size_t MAX_NDN_PACKET_SIZE = 8800;
+
 /** \class Face
  *  \brief represents a face
  */
-class Face : noncopyable
+class Face : noncopyable, public enable_shared_from_this<Face>
 {
 public:
   Face(FaceId id);
@@ -33,6 +35,9 @@
   
   /// fires when a Data is received
   EventEmitter<const Data&> onReceiveData;
+
+  /// fires when face disconnects or fails to perform properly
+  EventEmitter<const std::string& /*reason*/> onFail;
   
   /// send an Interest
   virtual void