Example #1
0
int main (int argc, char *argv[])
{
  uint32_t packetSize = 1000; // Application bytes per packet
  double interval = 1.0; // Time between events
  uint32_t generationSize = 5; // RLNC generation size
  double errorRate = 0.3; // Error rate for all the links

  Time interPacketInterval = Seconds (interval);

  CommandLine cmd;

  cmd.AddValue ("packetSize", "Size of application packet sent", packetSize);
  cmd.AddValue ("interval", "Interval (seconds) between packets", interval);
  cmd.AddValue ("generationSize", "Set the generation size to use",
                generationSize);
  cmd.AddValue ("errorRate", "Packet erasure rate for the links", errorRate);

  cmd.Parse (argc, argv);

  Time::SetResolution (Time::NS);

  // Set the basic helper for a single link
  PointToPointHelper pointToPoint;

  // Two receivers against a centralized hub. Note: DO NOT CHANGE THIS LINE
  PointToPointStarHelper star (2, pointToPoint);

  // Set error model for the net devices
  Config::SetDefault ("ns3::RateErrorModel::ErrorUnit",
                      StringValue ("ERROR_UNIT_PACKET"));

  Ptr<RateErrorModel> error_model = CreateObject<RateErrorModel> ();
  error_model->SetAttribute ("ErrorRate", DoubleValue (errorRate));

  star.GetSpokeNode (0)->GetDevice (0)->
    SetAttribute ("ReceiveErrorModel", PointerValue (error_model));
  star.GetSpokeNode (1)->GetDevice (0)->
    SetAttribute ("ReceiveErrorModel", PointerValue (error_model));
  error_model->Enable ();

  // Setting IP protocol stack
  InternetStackHelper internet;
  star.InstallStack(internet);

  // Set IP addresses
  star.AssignIpv4Addresses (Ipv4AddressHelper ("10.1.1.0", "255.255.255.0"));

  // Creation of RLNC encoder and decoder objects
  rlnc_encoder::factory encoder_factory(generationSize, packetSize);
  rlnc_decoder::factory decoder_factory(generationSize, packetSize);

  // The member build function creates differents instances of each object
  KodoSimulation kodoSimulator(encoder_factory.build(),
                               decoder_factory.build(),
                               decoder_factory.build());

  // Setting up application sockets for receivers and senders
  uint16_t port = 80;
  TypeId tid = TypeId::LookupByName ("ns3::UdpSocketFactory");
  InetSocketAddress local = InetSocketAddress (Ipv4Address::GetAny (), port);

  // Receivers
  Ptr<Socket> recvSink1 = Socket::CreateSocket (star.GetSpokeNode (0), tid);
  recvSink1->Bind (local);
  recvSink1->SetRecvCallback (MakeCallback (&KodoSimulation::ReceivePacket1,
                                            &kodoSimulator));

  Ptr<Socket> recvSink2 = Socket::CreateSocket (star.GetSpokeNode (1), tid);
  recvSink2->Bind (local);
  recvSink2->SetRecvCallback (MakeCallback (&KodoSimulation::ReceivePacket2,
                                            &kodoSimulator));

  // Sender
  Ptr<Socket> source = Socket::CreateSocket (star.GetHub (), tid);
  InetSocketAddress remote = InetSocketAddress (Ipv4Address ("255.255.255.255"),
                                                port);
  source->SetAllowBroadcast (true);
  source->Connect (remote);

  // Turn on global static routing so we can actually be routed across the star
  Ipv4GlobalRoutingHelper::PopulateRoutingTables ();

  // Do pcap tracing on all point-to-point devices on all nodes
  pointToPoint.EnablePcapAll ("star");

  Simulator::ScheduleWithContext (source->GetNode ()->GetId (), Seconds (1.0),
                                  &KodoSimulation::GenerateTraffic,
                                  &kodoSimulator, source, interPacketInterval);
  Simulator::Run ();
  Simulator::Destroy ();

  return 0;
}
Example #2
0
int 
main (int argc, char *argv[])
{

  //
  // Set up some default values for the simulation.
  //
  Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (137));

  // ??? try and stick 15kb/s into the data rate
  Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("14kb/s"));

  //
  // Default number of nodes in the star.  Overridable by command line argument.
  //
  uint32_t nSpokes = 8;

  CommandLine cmd;
  cmd.AddValue ("nSpokes", "Number of nodes to place in the star", nSpokes);
  cmd.Parse (argc, argv);

  NS_LOG_INFO ("Build star topology.");
  PointToPointHelper pointToPoint;
  pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
  pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));
  PointToPointStarHelper star (nSpokes, pointToPoint);

  NS_LOG_INFO ("Install internet stack on all nodes.");
  InternetStackHelper internet;
  star.InstallStack (internet);

  NS_LOG_INFO ("Assign IP Addresses.");
  star.AssignIpv4Addresses (Ipv4AddressHelper ("10.1.1.0", "255.255.255.0"));

  NS_LOG_INFO ("Create applications.");
  //
  // Create a packet sink on the star "hub" to receive packets.
  // 
  uint16_t port = 50000;
  Address hubLocalAddress (InetSocketAddress (Ipv4Address::GetAny (), port));
  PacketSinkHelper packetSinkHelper ("ns3::TcpSocketFactory", hubLocalAddress);
  ApplicationContainer hubApp = packetSinkHelper.Install (star.GetHub ());
  hubApp.Start (Seconds (1.0));
  hubApp.Stop (Seconds (10.0));

  //
  // Create OnOff applications to send TCP to the hub, one on each spoke node.
  //
  OnOffHelper onOffHelper ("ns3::TcpSocketFactory", Address ());
  onOffHelper.SetAttribute ("OnTime", StringValue ("ns3::ConstantRandomVariable[Constant=1]"));
  onOffHelper.SetAttribute ("OffTime", StringValue ("ns3::ConstantRandomVariable[Constant=0]"));

  ApplicationContainer spokeApps;

  for (uint32_t i = 0; i < star.SpokeCount (); ++i)
    {
      AddressValue remoteAddress (InetSocketAddress (star.GetHubIpv4Address (i), port));
      onOffHelper.SetAttribute ("Remote", remoteAddress);
      spokeApps.Add (onOffHelper.Install (star.GetSpokeNode (i)));
    }
  spokeApps.Start (Seconds (1.0));
  spokeApps.Stop (Seconds (10.0));

  NS_LOG_INFO ("Enable static global routing.");
  //
  // Turn on global static routing so we can actually be routed across the star.
  //
  Ipv4GlobalRoutingHelper::PopulateRoutingTables ();

  NS_LOG_INFO ("Enable pcap tracing.");
  //
  // Do pcap tracing on all point-to-point devices on all nodes.
  //
  pointToPoint.EnablePcapAll ("star");

  NS_LOG_INFO ("Run Simulation.");
  Simulator::Run ();
  Simulator::Destroy ();
  NS_LOG_INFO ("Done.");

  return 0;
}