void
LinkControlHelper::setErrorRate(Ptr<Node> node1, Ptr<Node> node2, double errorRate)
{
NS_LOG_FUNCTION(node1 << node2 << errorRate);
NS_ASSERT(node1 != nullptr && node2 != nullptr);
NS_ASSERT(errorRate <= 1.0);
Ptr<ndn::L3Protocol> ndn1 = node1->GetObject<ndn::L3Protocol>();
Ptr<ndn::L3Protocol> ndn2 = node2->GetObject<ndn::L3Protocol>();
NS_ASSERT(ndn1 != nullptr && ndn2 != nullptr);
// iterate over all faces to find the right one
for (const auto& face : ndn1->getForwarder()->getFaceTable()) {
auto transport = dynamic_cast<NetDeviceTransport*>(face.getTransport());
if (transport == nullptr)
continue;
Ptr<PointToPointNetDevice> nd1 = transport->GetNetDevice()->GetObject<PointToPointNetDevice>();
if (nd1 == nullptr)
continue;
Ptr<Channel> channel = nd1->GetChannel();
if (channel == nullptr)
continue;
Ptr<PointToPointChannel> ppChannel = DynamicCast<PointToPointChannel>(channel);
Ptr<NetDevice> nd2 = ppChannel->GetDevice(0);
if (nd2->GetNode() == node1)
nd2 = ppChannel->GetDevice(1);
if (nd2->GetNode() == node2) {
ObjectFactory errorFactory("ns3::RateErrorModel");
errorFactory.Set("ErrorUnit", StringValue("ERROR_UNIT_PACKET"));
errorFactory.Set("ErrorRate", DoubleValue(errorRate));
if (errorRate <= 0) {
errorFactory.Set("IsEnabled", BooleanValue(false));
}
nd1->SetAttribute("ReceiveErrorModel", PointerValue(errorFactory.Create<ErrorModel>()));
nd2->SetAttribute("ReceiveErrorModel", PointerValue(errorFactory.Create<ErrorModel>()));
return;
}
}
NS_FATAL_ERROR("There is no link to fail between the requested nodes");
}
int
main(int argc, char* argv[])
{
// setting default parameters for PointToPoint links and channels
Config::SetDefault("ns3::PointToPointNetDevice::DataRate", StringValue("1Mbps"));
Config::SetDefault("ns3::PointToPointChannel::Delay", StringValue("10ms"));
Config::SetDefault("ns3::DropTailQueue::MaxPackets", StringValue("20"));
// Read optional command-line parameters (e.g., enable visualizer with ./waf --run=<> --visualize
CommandLine cmd;
cmd.Parse(argc, argv);
ofstream file1("/tmp/topo1.txt");
file1 << "router\n\n"
<< "#node city y x mpi-partition\n"
<< "A1 NA 1 1 1\n"
<< "B1 NA 80 -40 1\n"
<< "C1 NA 80 40 1\n"
<< "A2 NA 1 1 1\n"
<< "B2 NA 80 -40 1\n"
<< "C2 NA 80 40 1\n\n"
<< "link\n\n"
<< "# from to capacity metric delay queue\n"
<< "A1 B1 10Mbps 100 1ms 100\n"
<< "A1 C1 10Mbps 50 1ms 100\n"
<< "B1 C1 10Mbps 1 1ms 100\n"
<< "A2 B2 10Mbps 50 1ms 100\n"
<< "A2 C2 10Mbps 100 1ms 100\n"
<< "B2 C2 10Mbps 1 1ms 100\n";
file1.close();
AnnotatedTopologyReader topologyReader("");
topologyReader.SetFileName("/tmp/topo1.txt");
topologyReader.Read();
// Install NDN stack on all nodes
ndn::StackHelper ndnHelper;
ndnHelper.InstallAll();
topologyReader.ApplyOspfMetric();
ndn::GlobalRoutingHelper ndnGlobalRoutingHelper;
ndnGlobalRoutingHelper.InstallAll();
ndnGlobalRoutingHelper.AddOrigins("/test/prefix", Names::Find<Node>("C1"));
ndnGlobalRoutingHelper.AddOrigins("/test/prefix", Names::Find<Node>("C2"));
ndn::GlobalRoutingHelper::CalculateRoutes();
auto printFib = [](Ptr<Node> node) {
auto ndn = node->GetObject<ndn::L3Protocol>();
for (const auto& entry : ndn->getForwarder()->getFib()) {
cout << entry.getPrefix() << " (";
bool isFirst = true;
for (auto& nextHop : entry.getNextHops()) {
cout << *nextHop.getFace();
auto face = dynamic_pointer_cast<ndn::NetDeviceFace>(nextHop.getFace());
if (face == nullptr)
continue;
cout << " towards ";
if (!isFirst)
cout << ", ";
cout << Names::FindName(face->GetNetDevice()->GetChannel()->GetDevice(1)->GetNode());
isFirst = false;
}
cout << ")" << endl;
}
};
cout << "FIB content on node A1" << endl;
printFib(Names::Find<Node>("A1"));
cout << "FIB content on node A2" << endl;
printFib(Names::Find<Node>("A2"));
Simulator::Stop(Seconds(20.0));
Simulator::Run();
Simulator::Destroy();
return 0;
}
