--- a/src/internet-stack/ipv4-raw-socket-impl.cc	Wed Apr 07 16:42:47 2010 +0200
+++ a/src/internet-stack/ipv4-raw-socket-impl.cc	Wed Apr 07 16:45:22 2010 +0200
@@ -184,10 +184,14 @@ 
         {
           NS_LOG_LOGIC ("Route exists");
           ipv4->Send (p, route->GetSource (), dst, m_protocol, route);
+          NotifyDataSent (p->GetSize ());
+          NotifySend (GetTxAvailable ());
+          return p->GetSize();
         }
       else
         {
           NS_LOG_DEBUG ("dropped because no outgoing route.");
+          return -1;
         }
     }
   return 0;
--- a/src/internet-stack/udp-socket-impl.cc	Wed Apr 07 16:42:47 2010 +0200
+++ a/src/internet-stack/udp-socket-impl.cc	Wed Apr 07 16:45:22 2010 +0200
@@ -414,6 +414,9 @@ 
     {
       m_udp->Send(p->Copy (), m_endPoint->GetLocalAddress(), dest,
                   m_endPoint->GetLocalPort(), port, 0);
+      NotifyDataSent (p->GetSize ());
+      NotifySend (GetTxAvailable ());
+      return p->GetSize();
     }
   else if (ipv4->GetRoutingProtocol () != 0)
     {