tcp congestion control variants comparison

[Kushal Srivastava]

I am trying to compare the various tcp congestion control variants successively by attaching a socket binded to three different
host each connected to a distict sink via two routers. However the application is not passing packets through the topology as is depicted in the generated traces.I am using the following code for creating and binding the socket to the host.Address sinkAddress2 (InetSocketAddress (i4i7.GetAddress (0), sinkPort)); // interface of n4
// Create and bind the socket...

TypeId tid2 = TypeId::LookupByName ("ns3::TcpNewReno");
nodeId << c.Get (1)->GetId ();
std::string specificNode2 = "/NodeList/" + nodeId.str () + "/$ns3::TcpL4Protocol/SocketType";
Config::Set (specificNode2, TypeIdValue (tid2));
Ptr<Socket> ns3TcpSocket2 =
  Socket::CreateSocket (c.Get (1), TcpSocketFactory::GetTypeId ());
ns3TcpSocket2->BindToNetDevice(d1d6.Get(0));
 ns3TcpSocket2->TraceConnectWithoutContext ("CongestionWindow", MakeCallback (&CwndChange2));
  Ptr<MyApp> app2 = CreateObject<MyApp> ();
  app2->Setup (ns3TcpSocket2, sinkAddress2, 1536, 1000, DataRate ("250Kbps"));
  c.Get (1)->AddApplication (app2);
  app2->SetStartTime (Seconds (10.));
  app2->SetStopTime (Seconds (100.));

Here app is an instance of custom app as a normal on off application would not be useful since we need to attach them to sources before packets are sent out.
I have attached a copy of the code.