diff -r 0b22ae082153 src/applications/onoff/onoff-application.cc
--- a/src/applications/onoff/onoff-application.cc	Sun Mar 07 20:49:47 2010 +0100
+++ b/src/applications/onoff/onoff-application.cc	Mon Mar 08 16:58:34 2010 +0000
@@ -133,6 +133,7 @@
       m_socket = Socket::CreateSocket (GetNode(), m_tid);
       m_socket->Bind ();
       m_socket->Connect (m_peer);
+      m_socket->ShutdownRecv ();
     }
   // Insure no pending event
   CancelEvents ();
diff -r 0b22ae082153 src/applications/packet-sink/packet-sink.cc
--- a/src/applications/packet-sink/packet-sink.cc	Sun Mar 07 20:49:47 2010 +0100
+++ b/src/applications/packet-sink/packet-sink.cc	Mon Mar 08 16:58:34 2010 +0000
@@ -96,6 +96,7 @@
       m_socket = Socket::CreateSocket (GetNode(), m_tid);
       m_socket->Bind (m_local);
       m_socket->Listen ();
+      m_socket->ShutdownSend ();
       if (addressUtils::IsMulticast (m_local))
         {
           Ptr<UdpSocket> udpSocket = DynamicCast<UdpSocket> (m_socket);