int main (int argc, char *argv[])
{
uint32_t packetSize = 1000; // Application bytes per packet
double interval = 1.0; // Time between events
uint32_t generationSize = 3; // RLNC generation size
double errorRateEncoderRecoder = 0.4; // Error rate for encoder-recoder link
double errorRateRecoderDecoder = 0.2; // Error rate for recoder-decoder link
bool recodingFlag = true; // Flag to control recoding
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 ("errorRateEncoderRecoder",
"Packet erasure rate for the encoder-recoder link",
errorRateEncoderRecoder);
cmd.AddValue ("errorRateRecoderDecoder",
"Packet erasure rate for the recoder-decoder link",
errorRateRecoderDecoder);
cmd.AddValue ("recodingFlag", "Enable packet recoding", recodingFlag);
cmd.Parse (argc, argv);
Time::SetResolution (Time::NS);
// Set the basic helper for a single link
PointToPointHelper pointToPoint;
// Create node containers
NodeContainer nodes;
nodes.Create (3);
NodeContainer encoderRecoder = NodeContainer (nodes.Get (0), nodes.Get (1));
NodeContainer recoderDecoder = NodeContainer (nodes.Get (1), nodes.Get (2));
// Internet stack for the nodes
InternetStackHelper internet;
internet.Install (nodes);
// Create net device containers
NetDeviceContainer encoderRecoderDevs = pointToPoint.Install (encoderRecoder);
NetDeviceContainer recoderDecoderDevs = pointToPoint.Install (recoderDecoder);
NetDeviceContainer devices = NetDeviceContainer (encoderRecoderDevs,
recoderDecoderDevs);
// Set IP addresses
Ipv4AddressHelper ipv4("10.1.1.0", "255.255.255.0");
ipv4.Assign (devices);
// Turn on global static routing so we can actually be routed across the hops
Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
// Do pcap tracing on all point-to-point devices on all nodes. File naming
// convention is: multihop-[NODE_NUMBER]-[DEVICE_NUMBER].pcap
pointToPoint.EnablePcapAll ("multihop");
// Set error model for the net devices
Config::SetDefault ("ns3::RateErrorModel::ErrorUnit",
StringValue ("ERROR_UNIT_PACKET"));
Ptr<RateErrorModel> errorEncoderRecoder = CreateObject<RateErrorModel> ();
errorEncoderRecoder->SetAttribute ("ErrorRate",
DoubleValue (errorRateEncoderRecoder));
devices.Get (1)->SetAttribute ("ReceiveErrorModel",
PointerValue (errorEncoderRecoder));
Ptr<RateErrorModel> errorRecoderDecoder = CreateObject<RateErrorModel> ();
errorRecoderDecoder->SetAttribute ("ErrorRate",
DoubleValue (errorRateRecoderDecoder));
devices.Get (3)->SetAttribute ("ReceiveErrorModel",
PointerValue (errorRecoderDecoder));
errorEncoderRecoder->Enable ();
errorRecoderDecoder->Enable ();
// 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(),
recodingFlag);
// Setting up application sockets for recoder and decoder
uint16_t port = 80;
TypeId tid = TypeId::LookupByName ("ns3::UdpSocketFactory");
// Get node Ipv4 addresses
Ipv4Address recoderAddress = nodes.Get (1)->GetObject<Ipv4>()->
GetAddress(1,0).GetLocal();
Ipv4Address decoderAddress = nodes.Get (2)->GetObject<Ipv4>()->
GetAddress(1,0).GetLocal();
// Socket connection addresses
InetSocketAddress recoderSocketAddress = InetSocketAddress (recoderAddress,
port);
InetSocketAddress decoderSocketAddress = InetSocketAddress (decoderAddress,
port);
// Socket bind address
InetSocketAddress local = InetSocketAddress (Ipv4Address::GetAny(), port);
// Encoder
Ptr<Socket> encoderSocket = Socket::CreateSocket (nodes.Get (0), tid);
encoderSocket->Connect (recoderSocketAddress);
// Recoder
Ptr<Socket> recoderSocket = Socket::CreateSocket (nodes.Get (1), tid);
recoderSocket->Bind(local);
recoderSocket->Connect (decoderSocketAddress);
recoderSocket->
SetRecvCallback (MakeCallback (&KodoSimulation::ReceivePacketRecoder,
&kodoSimulator));
// Decoder
Ptr<Socket> decoderSocket = Socket::CreateSocket (nodes.Get (2), tid);
decoderSocket->Bind(local);
decoderSocket->
SetRecvCallback (MakeCallback (&KodoSimulation::ReceivePacketDecoder,
&kodoSimulator));
// Simulation setup
// Schedule encoding process
Simulator::ScheduleWithContext (encoderSocket->GetNode ()->GetId (),
Seconds (1.0),
&KodoSimulation::SendPacketEncoder,
&kodoSimulator, encoderSocket,
interPacketInterval);
Simulator::ScheduleWithContext (recoderSocket->GetNode ()->GetId (),
Seconds (1.5),
&KodoSimulation::SendPacketRecoder,
&kodoSimulator, recoderSocket,
interPacketInterval);
Simulator::Run ();
Simulator::Destroy ();
return 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;
}