table: FIB enumeration

refs #1315

Change-Id: I535d519836720c40f72904e5520d11026ea30a33
diff --git a/daemon/table/fib.cpp b/daemon/table/fib.cpp
index 940f604..30d20e6 100644
--- a/daemon/table/fib.cpp
+++ b/daemon/table/fib.cpp
@@ -130,4 +130,10 @@
   }
 }
 
+Fib::const_iterator
+Fib::begin() const
+{
+  return const_iterator(m_nameTree.fullEnumerate(&predicate_NameTreeEntry_hasFibEntry));
+}
+
 } // namespace nfd