Don't flood multicasts if no route found

src/node/ipv4-route.cc

@@ -30,6 +30,7 @@ namespace ns3 {
 
 Ipv4Route::Ipv4Route ()
 {}
+
 Ipv4Route::Ipv4Route (Ipv4Route const &route)
   : m_dest (route.m_dest),
     m_destNetworkMask (route.m_destNetworkMask),
@@ -37,6 +38,13 @@ Ipv4Route::Ipv4Route (Ipv4Route const &route)
     m_interface (route.m_interface)
 {}
 
+Ipv4Route::Ipv4Route (Ipv4Route const *route)
+  : m_dest (route->m_dest),
+    m_destNetworkMask (route->m_destNetworkMask),
+    m_gateway (route->m_gateway),
+    m_interface (route->m_interface)
+{}
+
 Ipv4Route::Ipv4Route (Ipv4Address dest,
                       Ipv4Address gateway,
                       uint32_t interface)
@@ -236,6 +244,15 @@ Ipv4MulticastRoute::Ipv4MulticastRoute (Ipv4MulticastRoute const &route)
 {
 }
 
+Ipv4MulticastRoute::Ipv4MulticastRoute (Ipv4MulticastRoute const *route)
+: 
+  m_origin (route->m_origin),
+  m_group (route->m_group),
+  m_inputInterface (route->m_inputInterface),
+  m_outputInterfaces (route->m_outputInterfaces)
+{
+}
+
 Ipv4MulticastRoute::Ipv4MulticastRoute (
   Ipv4Address origin, 
   Ipv4Address group, 

src/node/ipv4-route.h

@@ -37,12 +37,19 @@ public:
    * \brief This constructor does nothing
    */
   Ipv4Route ();
+
   /**
    * \brief Copy Constructor
    * \param route The route to copy
    */
   Ipv4Route (Ipv4Route const &route);
 
+  /**
+   * \brief Copy Constructor
+   * \param route The route to copy
+   */
+  Ipv4Route (Ipv4Route const *route);
+
   bool IsHost (void) const;
   /**
    * \return The IPv4 address of the destination of this route
@@ -108,12 +115,19 @@ public:
    * \brief This constructor does nothing
    */
   Ipv4MulticastRoute ();
+
   /**
    * \brief Copy Constructor
    * \param route The route to copy
    */
   Ipv4MulticastRoute (Ipv4MulticastRoute const &route);
 
+  /**
+   * \brief Copy Constructor
+   * \param route The route to copy
+   */
+  Ipv4MulticastRoute (Ipv4MulticastRoute const *route);
+
   /**
    * \return The IPv4 address of the source of this route
    */