improve the auto-generated doxygen output.

src/node/address.h

@@ -166,6 +166,11 @@ private:
   uint8_t m_data[MAX_SIZE];
 };
 
+/**
+ * \class ns3::AddressValue
+ * \brief hold objects of type ns3::Address
+ */
+
 ATTRIBUTE_HELPER_HEADER_2 (Address);
 
 bool operator == (const Address &a, const Address &b);

src/node/ipv4-address.h

@@ -185,6 +185,15 @@ private:
   uint32_t m_mask;
 };
 
+/**
+ * \class ns3::Ipv4AddressValue
+ * \brief hold objects of type ns3::Ipv4Address
+ */
+/**
+ * \class ns3::Ipv4MaskValue
+ * \brief hold objects of type ns3::Ipv4Mask
+ */
+
 ATTRIBUTE_HELPER_HEADER_2 (Ipv4Address);
 ATTRIBUTE_HELPER_HEADER_2 (Ipv4Mask);
 

src/node/mac48-address.h

@@ -112,6 +112,11 @@ private:
   uint8_t m_address[6];
 };
 
+/**
+ * \class ns3::Mac48AddressValue
+ * \brief hold objects of type ns3::Mac48Address
+ */
+
 ATTRIBUTE_HELPER_HEADER_2 (Mac48Address);
 
 bool operator == (const Mac48Address &a, const Mac48Address &b);