--- a/src/node/ipv4-address.cc	Mon Jun 18 15:55:47 2007 +0100
+++ b/src/node/ipv4-address.cc	Mon Jun 18 18:01:28 2007 +0100
@@ -230,6 +230,14 @@
   mask.Print (os);
   return os;
 }
+bool operator == (Ipv4Mask const &a, Ipv4Mask const &b)
+{
+  return a.IsEqual (b);
+}
+bool operator != (Ipv4Mask const &a, Ipv4Mask const &b)
+{
+  return !a.IsEqual (b);
+}
 
 
 }; // namespace ns3

--- a/src/node/ipv4-address.h	Mon Jun 18 15:55:47 2007 +0100
+++ b/src/node/ipv4-address.h	Mon Jun 18 18:01:28 2007 +0100
@@ -126,7 +126,9 @@
 public:
   size_t operator()(Ipv4Address const &x) const;
 };
-bool operator != (Ipv4Address const &a, Ipv4Address const &b);
+
+bool operator == (Ipv4Mask const &a, Ipv4Mask const &b);
+bool operator != (Ipv4Mask const &a, Ipv4Mask const &b);
 
 }; // namespace ns3