OnOff traffic single port multiple client

[Abdul Sikandar]

I want to install OnOff Application on a node which can send CBR traffic over TCP to multiple sink. My scenario is:
Consider A,B,C nodes and two flows A -> B, A -> C. I want that traffic for both flow should be served by node 'A' on single port. Currrently node 'A' uses two different port for node 'B' and 'C'.
A:49153 -> B:8899
B:49154 -> B:8899
Here is part of Application code :

PacketSinkHelper sink ("ns3::TcpSocketFactory",InetSocketAddress (Ipv4Address::GetAny (), sinkPort));
  ApplicationContainer sinkApp = sink.Install (staNodes);
  sinkApp.Start (Seconds (1.0));
  sinkApp.Stop (Seconds (20.0));
 
  //Applications
  OnOffHelper sourceHelper ("ns3::TcpSocketFactory",Address());
  sourceHelper.SetConstantRate (ns3::DataRate("120kb/s"), uint32_t(1024));

 
  ApplicationContainer sourceApp;
  for(uint32_t i=0; i<staNodes.GetN (); ++i)
  {
        AddressValue remoteAddress (InetSocketAddress (staInterface.GetAddress (i), sinkPort));
        sourceHelper.SetAttribute ("Remote", remoteAddress);
        sourceApp.Add (sourceHelper.Install (serverNode));
        sourceApp.Start (Seconds (1.5+i));
  }
  sourceApp.Stop (Seconds (20.0));
plz reply is there anyway to do so in ns3.

[Tommaso Pecorella]

Hi,

if you don't change the "sinkPort" variable, then your code already does what you're saying.

T.

[Abdul Sikandar]

Thanx for your reply, sorry their is a typo. I want to send tcp traffic to multiple nodes from single OnOff Application. Code submitted above creates separate instances for evry client. I want node 'A' to act as server and send OnOff traffic to any connected client

[Konstantinos]

With the current implementation of the OnOffApplication you can not achieve this.

You need to modify it, or develop your own application, which will create multiple connections. 

K.

[Abdul Sikandar]

It would be really heelpful, if you could point me to some implementation of tcp server in ns3 to begin with.

[Tommaso Pecorella]

Hi,

please... the application that opens the connection is a CLIENT.

What do you use to browse the Internet (i.e., your Internet Browser), a server or a client ?

A client.

And who's starting the connection, the browser or the Web Server ?

The browser.

And why the Web Server is named a Server ?

Because it's a server, it's waiting there for a TCP connection.

The clients usually use random ports, and that's what OnOffApplication is doing.

About an example... you have OnOffApplication, what's wrong with it ? It's a perfect example (of a client).

About a server (a real one), PacketSink is a server. Again, it's a good example.

Have fun,

T.