72     "Delay", TimeValue (MilliSeconds(2)));

    72     "Delay", TimeValue (MilliSeconds(2)));

    73 

    73 

    74   // use a helper function to connect our nodes to the shared channel.

    74   // use a helper function to connect our nodes to the shared channel.

    75   NS_LOG_INFO ("Build Topology.");

    75   NS_LOG_INFO ("Build Topology.");

    76   CsmaHelper csma;

    76   CsmaHelper csma;

    78   NetDeviceContainer devs = csma.Install (c, channel);

    78   NetDeviceContainer devs = csma.Install (c, channel);

    79 

    79 

    80   NS_LOG_INFO ("Create Applications.");

    80   NS_LOG_INFO ("Create Applications.");

    81   // Create the OnOff application to send raw datagrams

    81   // Create the OnOff application to send raw datagrams

    82   PacketSocketAddress socket;

    82   PacketSocketAddress socket;