all: Adding typedefs near forward declarations of Interest/ContentObject/Name
refs #29
diff --git a/utils/tracers/ndn-l3-tracer.h b/utils/tracers/ndn-l3-tracer.h
index 13c2630..45eec7d 100644
--- a/utils/tracers/ndn-l3-tracer.h
+++ b/utils/tracers/ndn-l3-tracer.h
@@ -31,10 +31,14 @@
namespace ndn {
-class Interest;
class Face;
+
+class Interest;
class ContentObject;
+typedef Interest InterestHeader;
+typedef ContentObject ContentObjectHeader;
+
/**
* @brief Base class for network-layer (incoming/outgoing Interests and Data) tracing of NDN stack
*/