int main (int argc, char *argv[])
{
#ifdef NS3_CLICK
NodeContainer csmaNodes;
csmaNodes.Create (2);
// Setup CSMA channel between the nodes
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate (5000000)));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
NetDeviceContainer csmaDevices = csma.Install (csmaNodes);
// Install normal internet stack on node B
InternetStackHelper internet;
internet.Install (csmaNodes.Get (1));
// Install Click on node A
ClickInternetStackHelper clickinternet;
clickinternet.SetClickFile (csmaNodes.Get (0), "src/click/examples/nsclick-lan-single-interface.click");
clickinternet.SetRoutingTableElement (csmaNodes.Get (0), "rt");
clickinternet.Install (csmaNodes.Get (0));
// Configure IP addresses for the nodes
Ipv4AddressHelper ipv4;
ipv4.SetBase ("172.16.1.0", "255.255.255.0");
ipv4.Assign (csmaDevices);
// Configure traffic application and sockets
Address LocalAddress (InetSocketAddress (Ipv4Address::GetAny (), 50000));
PacketSinkHelper packetSinkHelper ("ns3::TcpSocketFactory", LocalAddress);
ApplicationContainer recvapp = packetSinkHelper.Install (csmaNodes.Get (1));
recvapp.Start (Seconds (5.0));
recvapp.Stop (Seconds (10.0));
OnOffHelper onOffHelper ("ns3::TcpSocketFactory", Address ());
onOffHelper.SetAttribute ("OnTime", StringValue ("ns3::ConstantRandomVariable[Constant=1]"));
onOffHelper.SetAttribute ("OffTime", StringValue ("ns3::ConstantRandomVariable[Constant=0]"));
ApplicationContainer appcont;
AddressValue remoteAddress (InetSocketAddress (Ipv4Address ("172.16.1.2"), 50000));
onOffHelper.SetAttribute ("Remote", remoteAddress);
appcont.Add (onOffHelper.Install (csmaNodes.Get (0)));
appcont.Start (Seconds (5.0));
appcont.Stop (Seconds (10.0));
// For tracing
csma.EnablePcap ("nsclick-simple-lan", csmaDevices, false);
Simulator::Stop (Seconds (20.0));
Simulator::Run ();
Simulator::Destroy ();
return 0;
#else
NS_FATAL_ERROR ("Can't use ns-3-click without NSCLICK compiled in");
#endif
}
//
// Network topology
//
// n0 n1 n2 n3
// | | | |
// =====================
//
// - Packet socket flow from n0 to n1 and from node n3 to n0
// -- We will test reception at node n0
// - Default 512 byte packets generated by traffic generator
//
void
CsmaPacketSocketTestCase::DoRun (void)
{
// Here, we will explicitly create four nodes.
NodeContainer nodes;
nodes.Create (4);
PacketSocketHelper packetSocket;
packetSocket.Install (nodes);
// create the shared medium used by all csma devices.
Ptr<CsmaChannel> channel = CreateObjectWithAttributes<CsmaChannel> (
"DataRate", DataRateValue (DataRate (5000000)),
"Delay", TimeValue (MilliSeconds (2)));
// use a helper function to connect our nodes to the shared channel.
CsmaHelper csma;
csma.SetDeviceAttribute ("EncapsulationMode", StringValue ("Llc"));
NetDeviceContainer devs = csma.Install (nodes, channel);
// Create the OnOff application to send raw datagrams
//
// Make packets be sent about every DefaultPacketSize / DataRate =
// 4096 bits / (5000 bits/second) = 0.82 second.
PacketSocketAddress socket;
socket.SetSingleDevice (devs.Get (0)->GetIfIndex ());
socket.SetPhysicalAddress (devs.Get (1)->GetAddress ());
socket.SetProtocol (2);
OnOffHelper onoff ("ns3::PacketSocketFactory", Address (socket));
onoff.SetConstantRate (DataRate (5000));
ApplicationContainer apps = onoff.Install (nodes.Get (0));
apps.Start (Seconds (1.0));
apps.Stop (Seconds (10.0));
socket.SetSingleDevice (devs.Get (3)->GetIfIndex ());
socket.SetPhysicalAddress (devs.Get (0)->GetAddress ());
socket.SetProtocol (3);
onoff.SetAttribute ("Remote", AddressValue (socket));
apps = onoff.Install (nodes.Get (3));
apps.Start (Seconds (1.0));
apps.Stop (Seconds (10.0));
PacketSinkHelper sink = PacketSinkHelper ("ns3::PacketSocketFactory",
socket);
apps = sink.Install (nodes.Get (0));
apps.Start (Seconds (0.0));
apps.Stop (Seconds (20.0));
// Trace receptions
Config::Connect ("/NodeList/0/ApplicationList/*/$ns3::PacketSink/Rx",
MakeCallback (&CsmaPacketSocketTestCase::SinkRx, this));
Simulator::Run ();
Simulator::Destroy ();
// We should have received 10 packets on node 0
NS_TEST_ASSERT_MSG_EQ (m_count, 10, "Node 0 should have received 10 packets");
}
int
main (int argc, char *argv[])
{
CommandLine cmd;
cmd.Parse (argc, argv);
//
// We are interacting with the outside, real, world. This means we have to
// interact in real-time and therefore means we have to use the real-time
// simulator and take the time to calculate checksums.
//
GlobalValue::Bind ("SimulatorImplementationType", StringValue ("ns3::RealtimeSimulatorImpl"));
GlobalValue::Bind ("ChecksumEnabled", BooleanValue (true));
//
// Create two ghost nodes. The first will represent the virtual machine host
// on the left side of the network; and the second will represent the VM on
// the right side.
//
NodeContainer nodes;
nodes.Create (2);
//
// Use a CsmaHelper to get a CSMA channel created, and the needed net
// devices installed on both of the nodes. The data rate and delay for the
// channel can be set through the command-line parser. For example,
//
// ./waf --run "tap=csma-virtual-machine --ns3::CsmaChannel::DataRate=10000000"
//
CsmaHelper csma;
NetDeviceContainer devices = csma.Install (nodes);
//
// Use the TapBridgeHelper to connect to the pre-configured tap devices for
// the left side. We go with "UseBridge" mode since the CSMA devices support
// promiscuous mode and can therefore make it appear that the bridge is
// extended into ns-3. The install method essentially bridges the specified
// tap to the specified CSMA device.
//
TapBridgeHelper tapBridge;
tapBridge.SetAttribute ("Mode", StringValue ("UseBridge"));
tapBridge.SetAttribute ("DeviceName", StringValue ("tap-left"));
tapBridge.Install (nodes.Get (0), devices.Get (0));
//
// Connect the right side tap to the right side CSMA device on the right-side
// ghost node.
//
tapBridge.SetAttribute ("DeviceName", StringValue ("tap-right"));
tapBridge.Install (nodes.Get (1), devices.Get (1));
//
// Run the simulation for ten minutes to give the user time to play around
//
Simulator::Stop (Seconds (600.));
Simulator::Run ();
Simulator::Destroy ();
}
//
// Network topology
// (sender) (receiver)
// n0 n1 n2 n3
// | | | |
// =====================
//
// Node n0 sends data to node n3 over a raw IP socket. The protocol
// number used is 2.
//
void
CsmaRawIpSocketTestCase::DoRun (void)
{
// Here, we will explicitly create four nodes.
NodeContainer c;
c.Create (4);
// connect all our nodes to a shared channel.
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate (5000000)));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
csma.SetDeviceAttribute ("EncapsulationMode", StringValue ("Llc"));
NetDeviceContainer devs = csma.Install (c);
// add an ip stack to all nodes.
InternetStackHelper ipStack;
ipStack.Install (c);
// assign ip addresses
Ipv4AddressHelper ip;
ip.SetBase ("192.168.1.0", "255.255.255.0");
Ipv4InterfaceContainer addresses = ip.Assign (devs);
// IP protocol configuration
//
// Make packets be sent about every DefaultPacketSize / DataRate =
// 4096 bits / (5000 bits/second) = 0.82 second.
Config::SetDefault ("ns3::Ipv4RawSocketImpl::Protocol", StringValue ("2"));
InetSocketAddress dst = InetSocketAddress (addresses.GetAddress (3));
OnOffHelper onoff = OnOffHelper ("ns3::Ipv4RawSocketFactory", dst);
onoff.SetConstantRate (DataRate (5000));
ApplicationContainer apps = onoff.Install (c.Get (0));
apps.Start (Seconds (1.0));
apps.Stop (Seconds (10.0));
PacketSinkHelper sink = PacketSinkHelper ("ns3::Ipv4RawSocketFactory", dst);
apps = sink.Install (c.Get (3));
apps.Start (Seconds (0.0));
apps.Stop (Seconds (12.0));
// Trace receptions
Config::ConnectWithoutContext ("/NodeList/3/ApplicationList/0/$ns3::PacketSink/Rx",
MakeCallback (&CsmaRawIpSocketTestCase::SinkRx, this));
Simulator::Run ();
Simulator::Destroy ();
// We should have sent and received 10 packets
NS_TEST_ASSERT_MSG_EQ (m_count, 10, "Node 3 should have received 10 packets");
}
int
main(int argc, char* argv[])
{
// setting default parameters for PointToPoint links and channels
Config::SetDefault("ns3::CsmaChannel::DataRate", StringValue("1Mbps"));
Config::SetDefault("ns3::CsmaChannel::Delay", StringValue("10ms"));
Config::SetDefault("ns3::QueueBase::MaxPackets", UintegerValue(20));
// Read optional command-line parameters (e.g., enable visualizer with ./waf --run=<> --visualize
CommandLine cmd;
cmd.Parse(argc, argv);
// Creating nodes
NodeContainer nodes;
nodes.Create(3);
// Connecting nodes using two links
CsmaHelper csma;
csma.Install(nodes);
// Install NDN stack on all nodes
ndn::StackHelper ndnHelper;
ndnHelper.SetDefaultRoutes(true);
ndnHelper.InstallAll();
// Installing applications
// Consumer
ndn::AppHelper consumerHelper("ns3::ndn::ConsumerCbr");
// Consumer will request /prefix/0, /prefix/1, ...
consumerHelper.SetPrefix("/prefix");
consumerHelper.SetAttribute("Frequency", StringValue("10")); // 10 interests a second
consumerHelper.Install(nodes.Get(0)); // first node
// Producer
ndn::AppHelper producerHelper("ns3::ndn::Producer");
// Producer will reply to all requests starting with /prefix
producerHelper.SetPrefix("/prefix");
producerHelper.SetAttribute("PayloadSize", StringValue("1024"));
producerHelper.Install(nodes.Get(2)); // last node
Simulator::Stop(Seconds(20.0));
Simulator::Run();
Simulator::Destroy();
return 0;
}
// Network topology (default)
//
// n2 + + n3 .
// | ... |\ /| ... | .
// ======= \ / ======= .
// CSMA \ / CSMA .
// \ / .
// n1 +--- n0 ---+ n4 .
// | ... | / \ | ... | .
// ======= / \ ======= .
// CSMA / \ CSMA .
// / \ .
// n6 + + n5 .
// | ... | | ... | .
// ======= ======= .
// CSMA CSMA .
//
void
CsmaStarTestCase::DoRun (void)
{
//
// Default number of nodes in the star.
//
uint32_t nSpokes = 7;
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", StringValue ("100Mbps"));
csma.SetChannelAttribute ("Delay", StringValue ("1ms"));
CsmaStarHelper star (nSpokes, csma);
NodeContainer fillNodes;
//
// Just to be nasy, hang some more nodes off of the CSMA channel for each
// spoke, so that there are a total of 16 nodes on each channel. Stash
// all of these new devices into a container.
//
NetDeviceContainer fillDevices;
uint32_t nFill = 14;
for (uint32_t i = 0; i < star.GetSpokeDevices ().GetN (); ++i)
{
Ptr<Channel> channel = star.GetSpokeDevices ().Get (i)->GetChannel ();
Ptr<CsmaChannel> csmaChannel = channel->GetObject<CsmaChannel> ();
NodeContainer newNodes;
newNodes.Create (nFill);
fillNodes.Add (newNodes);
fillDevices.Add (csma.Install (newNodes, csmaChannel));
}
InternetStackHelper internet;
star.InstallStack (internet);
internet.Install (fillNodes);
star.AssignIpv4Addresses (Ipv4AddressHelper ("10.1.0.0", "255.255.255.0"));
//
// We assigned addresses to the logical hub and the first "drop" of the
// CSMA network that acts as the spoke, but we also have a number of fill
// devices (nFill) also hanging off the CSMA network. We have got to
// assign addresses to them as well. We put all of the fill devices into
// a single device container, so the first nFill devices are associated
// with the channel connected to spokeDevices.Get (0), the second nFill
// devices afe associated with the channel connected to spokeDevices.Get (1)
// etc.
//
Ipv4AddressHelper address;
for(uint32_t i = 0; i < star.SpokeCount (); ++i)
{
std::ostringstream subnet;
subnet << "10.1." << i << ".0";
address.SetBase (subnet.str ().c_str (), "255.255.255.0", "0.0.0.3");
for (uint32_t j = 0; j < nFill; ++j)
{
address.Assign (fillDevices.Get (i * nFill + j));
}
}
//
// 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.
//
// Make packets be sent about every DefaultPacketSize / DataRate =
// 4096 bits / (5000 bits/second) = 0.82 second.
OnOffHelper onOffHelper ("ns3::TcpSocketFactory", Address ());
onOffHelper.SetConstantRate (DataRate (5000));
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));
//
// Because we are evil, we also add OnOff applications to send TCP to the hub
// from the fill devices on each CSMA link. The first nFill nodes in the
// fillNodes container are on the CSMA network talking to the zeroth device
// on the hub node. The next nFill nodes are on the CSMA network talking to
// the first device on the hub node, etc. So the ith fillNode is associated
// with the hub address found on the (i / nFill)th device on the hub node.
//
ApplicationContainer fillApps;
for (uint32_t i = 0; i < fillNodes.GetN (); ++i)
{
AddressValue remoteAddress (InetSocketAddress (star.GetHubIpv4Address (i / nFill), port));
onOffHelper.SetAttribute ("Remote", remoteAddress);
fillApps.Add (onOffHelper.Install (fillNodes.Get (i)));
}
fillApps.Start (Seconds (1.0));
fillApps.Stop (Seconds (10.0));
//
// Turn on global static routing so we can actually be routed across the star.
//
Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
// Trace receptions
Config::ConnectWithoutContext ("/NodeList/0/ApplicationList/*/$ns3::PacketSink/Rx",
MakeCallback (&CsmaStarTestCase::SinkRx, this));
Simulator::Run ();
Simulator::Destroy ();
// The hub node should have received 10 packets from the nFill + 1
// nodes on each spoke.
NS_TEST_ASSERT_MSG_EQ (m_count, 10 * ( nSpokes * (nFill + 1)), "Hub node did not receive the proper number of packets");
}
// Network topology
//
// n0 n1
// | |
// ----------
// | Switch |
// ----------
// | |
// n2 n3
//
// - CBR/UDP test flow from n0 to n1; test that packets received on n1
//
void
CsmaBridgeTestCase::DoRun (void)
{
NodeContainer terminals;
terminals.Create (4);
NodeContainer csmaSwitch;
csmaSwitch.Create (1);
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (5000000));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
NetDeviceContainer terminalDevices;
NetDeviceContainer switchDevices;
for (int i = 0; i < 4; i++)
{
NetDeviceContainer link = csma.Install (NodeContainer (terminals.Get (i), csmaSwitch));
terminalDevices.Add (link.Get (0));
switchDevices.Add (link.Get (1));
}
// Create the bridge netdevice, which will do the packet switching
Ptr<Node> switchNode = csmaSwitch.Get (0);
BridgeHelper bridge;
bridge.Install (switchNode, switchDevices);
InternetStackHelper internet;
internet.Install (terminals);
Ipv4AddressHelper ipv4;
ipv4.SetBase ("10.1.1.0", "255.255.255.0");
ipv4.Assign (terminalDevices);
uint16_t port = 9; // Discard port (RFC 863)
// Create the OnOff application to send UDP datagrams from n0 to n1.
//
// Make packets be sent about every DefaultPacketSize / DataRate =
// 4096 bits / (5000 bits/second) = 0.82 second.
OnOffHelper onoff ("ns3::UdpSocketFactory",
Address (InetSocketAddress (Ipv4Address ("10.1.1.2"), port)));
onoff.SetConstantRate (DataRate (5000));
ApplicationContainer app = onoff.Install (terminals.Get (0));
app.Start (Seconds (1.0));
app.Stop (Seconds (10.0));
PacketSinkHelper sink ("ns3::UdpSocketFactory",
Address (InetSocketAddress (Ipv4Address::GetAny (), port)));
app = sink.Install (terminals.Get (1));
app.Start (Seconds (0.0));
// Trace receptions
Config::ConnectWithoutContext ("/NodeList/1/ApplicationList/0/$ns3::PacketSink/Rx", MakeCallback (&CsmaBridgeTestCase::SinkRx, this));
Simulator::Run ();
Simulator::Destroy ();
// We should have sent and received 10 packets
NS_TEST_ASSERT_MSG_EQ (m_count, 10, "Bridge should have passed 10 packets");
}
// Network topology
//
// n0 n1 n2 n3
// | | | |
// =================
// LAN
//
// - CBR/UDP flows from n0 to n1 and from n3 to n0
// - DropTail queues
//
void
CsmaOneSubnetTestCase::DoRun (void)
{
NodeContainer nodes;
nodes.Create (4);
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (5000000));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
//
// Now fill out the topology by creating the net devices required to connect
// the nodes to the channels and hooking them up.
//
NetDeviceContainer devices = csma.Install (nodes);
InternetStackHelper internet;
internet.Install (nodes);
// We've got the "hardware" in place. Now we need to add IP addresses.
//
Ipv4AddressHelper ipv4;
ipv4.SetBase ("10.1.1.0", "255.255.255.0");
Ipv4InterfaceContainer interfaces = ipv4.Assign (devices);
uint16_t port = 9; // Discard port (RFC 863)
//
// Create an OnOff application to send UDP datagrams from node zero
// to node 1.
//
// Make packets be sent about every defaultPacketSize / dataRate =
// 4096 bits / (5000 bits/second) = 0.82 second.
OnOffHelper onoff ("ns3::UdpSocketFactory",
Address (InetSocketAddress (interfaces.GetAddress (1), port)));
onoff.SetConstantRate (DataRate (5000));
ApplicationContainer app = onoff.Install (nodes.Get (0));
// Start the application
app.Start (Seconds (1.0));
app.Stop (Seconds (10.0));
// Create an optional packet sink to receive these packets
PacketSinkHelper sink ("ns3::UdpSocketFactory",
Address (InetSocketAddress (Ipv4Address::GetAny (), port)));
app = sink.Install (nodes.Get (1));
app.Start (Seconds (0.0));
//
// Create a similar flow from n3 to n0, starting at time 1.1 seconds
//
onoff.SetAttribute ("Remote",
AddressValue (InetSocketAddress (interfaces.GetAddress (0), port)));
app = onoff.Install (nodes.Get (3));
app.Start (Seconds (1.1));
app.Stop (Seconds (10.0));
app = sink.Install (nodes.Get (0));
app.Start (Seconds (0.0));
// Trace receptions
Config::ConnectWithoutContext ("/NodeList/0/ApplicationList/1/$ns3::PacketSink/Rx", MakeCallback (&CsmaOneSubnetTestCase::SinkRxNode0, this));
Config::ConnectWithoutContext ("/NodeList/1/ApplicationList/0/$ns3::PacketSink/Rx", MakeCallback (&CsmaOneSubnetTestCase::SinkRxNode1, this));
//
// Now, do the actual simulation.
//
Simulator::Run ();
Simulator::Destroy ();
// We should have sent and received 10 packets
NS_TEST_ASSERT_MSG_EQ (m_countNode0, 10, "Node 0 should have received 10 packets");
NS_TEST_ASSERT_MSG_EQ (m_countNode1, 10, "Node 1 should have received 10 packets");
}
int
main (int argc, char *argv[])
{
//
// Users may find it convenient to turn on explicit debugging
// for selected modules; the below lines suggest how to do this
//
#if 0
LogComponentEnable ("CsmaBridgeOneHopExample", LOG_LEVEL_INFO);
#endif
//
// Allow the user to override any of the defaults and the above Bind() at
// run-time, via command-line arguments
//
CommandLine cmd;
cmd.Parse (argc, argv);
//
// Explicitly create the nodes required by the topology (shown above).
//
NS_LOG_INFO ("Create nodes.");
Ptr<Node> n0 = CreateObject<Node> ();
Ptr<Node> n1 = CreateObject<Node> ();
Ptr<Node> n2 = CreateObject<Node> ();
Ptr<Node> n3 = CreateObject<Node> ();
Ptr<Node> n4 = CreateObject<Node> ();
Ptr<Node> bridge1 = CreateObject<Node> ();
Ptr<Node> bridge2 = CreateObject<Node> ();
NS_LOG_INFO ("Build Topology");
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (5000000));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
// Create the csma links, from each terminal to the bridge
// This will create six network devices; we'll keep track separately
// of the devices on and off the bridge respectively, for later configuration
NetDeviceContainer topLanDevices;
NetDeviceContainer topBridgeDevices;
// It is easier to iterate the nodes in C++ if we put them into a container
NodeContainer topLan (n2, n0, n1);
for (int i = 0; i < 3; i++)
{
// install a csma channel between the ith toplan node and the bridge node
NetDeviceContainer link = csma.Install (NodeContainer (topLan.Get (i), bridge1));
topLanDevices.Add (link.Get (0));
topBridgeDevices.Add (link.Get (1));
}
//
// Now, Create the bridge netdevice, which will do the packet switching. The
// bridge lives on the node bridge1 and bridges together the topBridgeDevices
// which are the three CSMA net devices on the node in the diagram above.
//
BridgeHelper bridge;
bridge.Install (bridge1, topBridgeDevices);
// Add internet stack to the router nodes
NodeContainer routerNodes (n0, n1, n2, n3, n4);
InternetStackHelper internet;
internet.Install (routerNodes);
// Repeat for bottom bridged LAN
NetDeviceContainer bottomLanDevices;
NetDeviceContainer bottomBridgeDevices;
NodeContainer bottomLan (n2, n3, n4);
for (int i = 0; i < 3; i++)
{
NetDeviceContainer link = csma.Install (NodeContainer (bottomLan.Get (i), bridge2));
bottomLanDevices.Add (link.Get (0));
bottomBridgeDevices.Add (link.Get (1));
}
bridge.Install (bridge2, bottomBridgeDevices);
// We've got the "hardware" in place. Now we need to add IP addresses.
NS_LOG_INFO ("Assign IP Addresses.");
Ipv4AddressHelper ipv4;
ipv4.SetBase ("10.1.1.0", "255.255.255.0");
ipv4.Assign (topLanDevices);
ipv4.SetBase ("10.1.2.0", "255.255.255.0");
ipv4.Assign (bottomLanDevices);
//
// Create router nodes, initialize routing database and set up the routing
// tables in the nodes. We excuse the bridge nodes from having to serve as
// routers, since they don't even have internet stacks on them.
//
Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
//
// Create an OnOff application to send UDP datagrams from node zero to node 1.
//
NS_LOG_INFO ("Create Applications.");
uint16_t port = 9; // Discard port (RFC 863)
OnOffHelper onoff ("ns3::UdpSocketFactory",
Address (InetSocketAddress (Ipv4Address ("10.1.1.3"), port)));
onoff.SetConstantRate (DataRate ("500kb/s"));
ApplicationContainer app = onoff.Install (n0);
// Start the application
app.Start (Seconds (1.0));
app.Stop (Seconds (10.0));
// Create an optional packet sink to receive these packets
PacketSinkHelper sink ("ns3::UdpSocketFactory",
Address (InetSocketAddress (Ipv4Address::GetAny (), port)));
ApplicationContainer sink1 = sink.Install (n1);
sink1.Start (Seconds (1.0));
sink1.Stop (Seconds (10.0));
//
// Create a similar flow from n3 to n0, starting at time 1.1 seconds
//
onoff.SetAttribute ("Remote",
AddressValue (InetSocketAddress (Ipv4Address ("10.1.1.2"), port)));
ApplicationContainer app2 = onoff.Install (n3);
app2.Start (Seconds (1.1));
app2.Stop (Seconds (10.0));
ApplicationContainer sink2 = sink.Install (n0);
sink2.Start (Seconds (1.1));
sink2.Stop (Seconds (10.0));
NS_LOG_INFO ("Configure Tracing.");
//
// Configure tracing of all enqueue, dequeue, and NetDevice receive events.
// Trace output will be sent to the file "csma-bridge-one-hop.tr"
//
AsciiTraceHelper ascii;
csma.EnableAsciiAll (ascii.CreateFileStream ("csma-bridge-one-hop.tr"));
//
// Also configure some tcpdump traces; each interface will be traced.
// The output files will be named:
// csma-bridge-one-hop-<nodeId>-<interfaceId>.pcap
// and can be read by the "tcpdump -r" command (use "-tt" option to
// display timestamps correctly)
//
csma.EnablePcapAll ("csma-bridge-one-hop", false);
//
// Now, do the actual simulation.
//
NS_LOG_INFO ("Run Simulation.");
Simulator::Run ();
Simulator::Destroy ();
NS_LOG_INFO ("Done.");
}
int
main (int argc, char *argv[])
{
CommandLine cmd;
cmd.Parse (argc, argv);
// Here, we will explicitly create four nodes.
NS_LOG_INFO ("Create nodes.");
NodeContainer c;
c.Create (4);
// connect all our nodes to a shared channel.
NS_LOG_INFO ("Build Topology.");
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate (5000000)));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
csma.SetDeviceAttribute ("EncapsulationMode", StringValue ("Llc"));
NetDeviceContainer devs = csma.Install (c);
// add an ip stack to all nodes.
NS_LOG_INFO ("Add ip stack.");
InternetStackHelper ipStack;
ipStack.Install (c);
// assign ip addresses
NS_LOG_INFO ("Assign ip addresses.");
Ipv4AddressHelper ip;
ip.SetBase ("192.168.1.0", "255.255.255.0");
Ipv4InterfaceContainer addresses = ip.Assign (devs);
NS_LOG_INFO ("Create Source");
Config::SetDefault ("ns3::Ipv4RawSocketImpl::Protocol", StringValue ("2"));
InetSocketAddress dst = InetSocketAddress (addresses.GetAddress (3));
OnOffHelper onoff = OnOffHelper ("ns3::Ipv4RawSocketFactory", dst);
onoff.SetConstantRate (DataRate (15000));
onoff.SetAttribute ("PacketSize", UintegerValue (1200));
ApplicationContainer apps = onoff.Install (c.Get (0));
apps.Start (Seconds (1.0));
apps.Stop (Seconds (10.0));
NS_LOG_INFO ("Create Sink.");
PacketSinkHelper sink = PacketSinkHelper ("ns3::Ipv4RawSocketFactory", dst);
apps = sink.Install (c.Get (3));
apps.Start (Seconds (0.0));
apps.Stop (Seconds (11.0));
NS_LOG_INFO ("Create pinger");
V4PingHelper ping = V4PingHelper (addresses.GetAddress (2));
NodeContainer pingers;
pingers.Add (c.Get (0));
pingers.Add (c.Get (1));
pingers.Add (c.Get (3));
apps = ping.Install (pingers);
apps.Start (Seconds (2.0));
apps.Stop (Seconds (5.0));
NS_LOG_INFO ("Configure Tracing.");
// first, pcap tracing in non-promiscuous mode
csma.EnablePcapAll ("csma-ping", false);
// then, print what the packet sink receives.
Config::ConnectWithoutContext ("/NodeList/3/ApplicationList/0/$ns3::PacketSink/Rx",
MakeCallback (&SinkRx));
// finally, print the ping rtts.
Config::Connect ("/NodeList/*/ApplicationList/*/$ns3::V4Ping/Rtt",
MakeCallback (&PingRtt));
Packet::EnablePrinting ();
NS_LOG_INFO ("Run Simulation.");
Simulator::Run ();
Simulator::Destroy ();
NS_LOG_INFO ("Done.");
}
int main (int argc, char *argv[])
{
uint32_t nWifis = 2;
uint32_t nStas = 2;
bool sendIp = true;
bool writeMobility = false;
CommandLine cmd;
cmd.AddValue ("nWifis", "Number of wifi networks", nWifis);
cmd.AddValue ("nStas", "Number of stations per wifi network", nStas);
cmd.AddValue ("SendIp", "Send Ipv4 or raw packets", sendIp);
cmd.AddValue ("writeMobility", "Write mobility trace", writeMobility);
cmd.Parse (argc, argv);
NodeContainer backboneNodes;
NetDeviceContainer backboneDevices;
Ipv4InterfaceContainer backboneInterfaces;
std::vector<NodeContainer> staNodes;
std::vector<NetDeviceContainer> staDevices;
std::vector<NetDeviceContainer> apDevices;
std::vector<Ipv4InterfaceContainer> staInterfaces;
std::vector<Ipv4InterfaceContainer> apInterfaces;
InternetStackHelper stack;
CsmaHelper csma;
Ipv4AddressHelper ip;
ip.SetBase ("192.168.0.0", "255.255.255.0");
backboneNodes.Create (nWifis);
stack.Install (backboneNodes);
backboneDevices = csma.Install (backboneNodes);
double wifiX = 0.0;
YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();
wifiPhy.SetPcapDataLinkType (YansWifiPhyHelper::DLT_IEEE802_11_RADIO);
for (uint32_t i = 0; i < nWifis; ++i)
{
// calculate ssid for wifi subnetwork
std::ostringstream oss;
oss << "wifi-default-" << i;
Ssid ssid = Ssid (oss.str ());
NodeContainer sta;
NetDeviceContainer staDev;
NetDeviceContainer apDev;
Ipv4InterfaceContainer staInterface;
Ipv4InterfaceContainer apInterface;
MobilityHelper mobility;
BridgeHelper bridge;
WifiHelper wifi = WifiHelper::Default ();
NqosWifiMacHelper wifiMac = NqosWifiMacHelper::Default ();
YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default ();
wifiPhy.SetChannel (wifiChannel.Create ());
sta.Create (nStas);
mobility.SetPositionAllocator ("ns3::GridPositionAllocator",
"MinX", DoubleValue (wifiX),
"MinY", DoubleValue (0.0),
"DeltaX", DoubleValue (5.0),
"DeltaY", DoubleValue (5.0),
"GridWidth", UintegerValue (1),
"LayoutType", StringValue ("RowFirst"));
// setup the AP.
mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
mobility.Install (backboneNodes.Get (i));
wifiMac.SetType ("ns3::ApWifiMac",
"Ssid", SsidValue (ssid));
apDev = wifi.Install (wifiPhy, wifiMac, backboneNodes.Get (i));
NetDeviceContainer bridgeDev;
bridgeDev = bridge.Install (backboneNodes.Get (i), NetDeviceContainer (apDev, backboneDevices.Get (i)));
// assign AP IP address to bridge, not wifi
apInterface = ip.Assign (bridgeDev);
// setup the STAs
stack.Install (sta);
mobility.SetMobilityModel ("ns3::RandomWalk2dMobilityModel",
"Mode", StringValue ("Time"),
"Time", StringValue ("2s"),
"Speed", StringValue ("ns3::ConstantRandomVariable[Constant=1.0]"),
"Bounds", RectangleValue (Rectangle (wifiX, wifiX+5.0,0.0, (nStas+1)*5.0)));
mobility.Install (sta);
wifiMac.SetType ("ns3::StaWifiMac",
"Ssid", SsidValue (ssid),
"ActiveProbing", BooleanValue (false));
staDev = wifi.Install (wifiPhy, wifiMac, sta);
staInterface = ip.Assign (staDev);
// save everything in containers.
staNodes.push_back (sta);
apDevices.push_back (apDev);
apInterfaces.push_back (apInterface);
staDevices.push_back (staDev);
staInterfaces.push_back (staInterface);
wifiX += 20.0;
}
Address dest;
std::string protocol;
if (sendIp)
{
dest = InetSocketAddress (staInterfaces[1].GetAddress (1), 1025);
protocol = "ns3::UdpSocketFactory";
}
else
{
PacketSocketAddress tmp;
tmp.SetSingleDevice (staDevices[0].Get (0)->GetIfIndex ());
tmp.SetPhysicalAddress (staDevices[1].Get (0)->GetAddress ());
tmp.SetProtocol (0x807);
dest = tmp;
protocol = "ns3::PacketSocketFactory";
}
OnOffHelper onoff = OnOffHelper (protocol, dest);
onoff.SetConstantRate (DataRate ("500kb/s"));
ApplicationContainer apps = onoff.Install (staNodes[0].Get (0));
apps.Start (Seconds (0.5));
apps.Stop (Seconds (3.0));
wifiPhy.EnablePcap ("wifi-wired-bridging", apDevices[0]);
wifiPhy.EnablePcap ("wifi-wired-bridging", apDevices[1]);
if (writeMobility)
{
AsciiTraceHelper ascii;
MobilityHelper::EnableAsciiAll (ascii.CreateFileStream ("wifi-wired-bridging.mob"));
}
Simulator::Stop (Seconds (5.0));
Simulator::Run ();
Simulator::Destroy ();
}
int
main (int argc, char *argv[])
{
std::string mode = "ConfigureLocal";
std::string tapName = "thetap";
CommandLine cmd;
cmd.AddValue ("mode", "Mode setting of TapBridge", mode);
cmd.AddValue ("tapName", "Name of the OS tap device", tapName);
cmd.Parse (argc, argv);
GlobalValue::Bind ("SimulatorImplementationType", StringValue ("ns3::RealtimeSimulatorImpl"));
GlobalValue::Bind ("ChecksumEnabled", BooleanValue (true));
//
// The topology has a Wifi network of four nodes on the left side. We'll make
// node zero the AP and have the other three will be the STAs.
//
NodeContainer nodesLeft;
nodesLeft.Create (4);
YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();
YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default ();
wifiPhy.SetChannel (wifiChannel.Create ());
Ssid ssid = Ssid ("left");
WifiHelper wifi = WifiHelper::Default ();
NqosWifiMacHelper wifiMac = NqosWifiMacHelper::Default ();
wifi.SetRemoteStationManager ("ns3::ArfWifiManager");
wifiMac.SetType ("ns3::ApWifiMac",
"Ssid", SsidValue (ssid));
NetDeviceContainer devicesLeft = wifi.Install (wifiPhy, wifiMac, nodesLeft.Get (0));
wifiMac.SetType ("ns3::StaWifiMac",
"Ssid", SsidValue (ssid),
"ActiveProbing", BooleanValue (false));
devicesLeft.Add (wifi.Install (wifiPhy, wifiMac, NodeContainer (nodesLeft.Get (1), nodesLeft.Get (2), nodesLeft.Get (3))));
MobilityHelper mobility;
mobility.Install (nodesLeft);
InternetStackHelper internetLeft;
internetLeft.Install (nodesLeft);
Ipv4AddressHelper ipv4Left;
ipv4Left.SetBase ("10.1.1.0", "255.255.255.0");
Ipv4InterfaceContainer interfacesLeft = ipv4Left.Assign (devicesLeft);
TapBridgeHelper tapBridge (interfacesLeft.GetAddress (1));
tapBridge.SetAttribute ("Mode", StringValue (mode));
tapBridge.SetAttribute ("DeviceName", StringValue (tapName));
tapBridge.Install (nodesLeft.Get (0), devicesLeft.Get (0));
//
// Now, create the right side.
//
NodeContainer nodesRight;
nodesRight.Create (4);
CsmaHelper csmaRight;
csmaRight.SetChannelAttribute ("DataRate", DataRateValue (5000000));
csmaRight.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
NetDeviceContainer devicesRight = csmaRight.Install (nodesRight);
InternetStackHelper internetRight;
internetRight.Install (nodesRight);
Ipv4AddressHelper ipv4Right;
ipv4Right.SetBase ("10.1.3.0", "255.255.255.0");
Ipv4InterfaceContainer interfacesRight = ipv4Right.Assign (devicesRight);
//
// Stick in the point-to-point line between the sides.
//
PointToPointHelper p2p;
p2p.SetDeviceAttribute ("DataRate", StringValue ("512kbps"));
p2p.SetChannelAttribute ("Delay", StringValue ("10ms"));
NodeContainer nodes = NodeContainer (nodesLeft.Get (3), nodesRight.Get (0));
NetDeviceContainer devices = p2p.Install (nodes);
Ipv4AddressHelper ipv4;
ipv4.SetBase ("10.1.2.0", "255.255.255.192");
Ipv4InterfaceContainer interfaces = ipv4.Assign (devices);
//
// Simulate some CBR traffic over the point-to-point link
//
uint16_t port = 9; // Discard port (RFC 863)
OnOffHelper onoff ("ns3::UdpSocketFactory", InetSocketAddress (interfaces.GetAddress (1), port));
onoff.SetConstantRate (DataRate ("500kb/s"));
ApplicationContainer apps = onoff.Install (nodesLeft.Get (3));
apps.Start (Seconds (1.0));
// Create a packet sink to receive these packets
PacketSinkHelper sink ("ns3::UdpSocketFactory", InetSocketAddress (Ipv4Address::GetAny (), port));
apps = sink.Install (nodesRight.Get (0));
apps.Start (Seconds (1.0));
wifiPhy.EnablePcapAll ("tap-wifi-dumbbell");
csmaRight.EnablePcapAll ("tap-wifi-dumbbell", false);
Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
Simulator::Stop (Seconds (60.));
Simulator::Run ();
Simulator::Destroy ();
}
void
EpcS1uDlTestCase::DoRun ()
{
Ptr<PointToPointEpcHelper> epcHelper = CreateObject<PointToPointEpcHelper> ();
Ptr<Node> pgw = epcHelper->GetPgwNode ();
// allow jumbo packets
Config::SetDefault ("ns3::CsmaNetDevice::Mtu", UintegerValue (30000));
Config::SetDefault ("ns3::PointToPointNetDevice::Mtu", UintegerValue (30000));
epcHelper->SetAttribute ("S1uLinkMtu", UintegerValue (30000));
// Create a single RemoteHost
NodeContainer remoteHostContainer;
remoteHostContainer.Create (1);
Ptr<Node> remoteHost = remoteHostContainer.Get (0);
InternetStackHelper internet;
internet.Install (remoteHostContainer);
// Create the internet
PointToPointHelper p2ph;
p2ph.SetDeviceAttribute ("DataRate", DataRateValue (DataRate ("100Gb/s")));
NetDeviceContainer internetDevices = p2ph.Install (pgw, remoteHost);
Ipv4AddressHelper ipv4h;
ipv4h.SetBase ("1.0.0.0", "255.0.0.0");
ipv4h.Assign (internetDevices);
// setup default gateway for the remote hosts
Ipv4StaticRoutingHelper ipv4RoutingHelper;
Ptr<Ipv4StaticRouting> remoteHostStaticRouting = ipv4RoutingHelper.GetStaticRouting (remoteHost->GetObject<Ipv4> ());
// hardcoded UE addresses for now
remoteHostStaticRouting->AddNetworkRouteTo (Ipv4Address ("7.0.0.0"), Ipv4Mask ("255.255.255.0"), 1);
NodeContainer enbs;
uint16_t cellIdCounter = 0;
for (std::vector<EnbDlTestData>::iterator enbit = m_enbDlTestData.begin ();
enbit < m_enbDlTestData.end ();
++enbit)
{
Ptr<Node> enb = CreateObject<Node> ();
enbs.Add (enb);
// we test EPC without LTE, hence we use:
// 1) a CSMA network to simulate the cell
// 2) a raw socket opened on the CSMA device to simulate the LTE socket
uint16_t cellId = ++cellIdCounter;
NodeContainer ues;
ues.Create (enbit->ues.size ());
NodeContainer cell;
cell.Add (ues);
cell.Add (enb);
CsmaHelper csmaCell;
NetDeviceContainer cellDevices = csmaCell.Install (cell);
// the eNB's CSMA NetDevice acting as an LTE NetDevice.
Ptr<NetDevice> enbDevice = cellDevices.Get (cellDevices.GetN () - 1);
// Note that the EpcEnbApplication won't care of the actual NetDevice type
epcHelper->AddEnb (enb, enbDevice, cellId);
// Plug test RRC entity
Ptr<EpcEnbApplication> enbApp = enb->GetApplication (0)->GetObject<EpcEnbApplication> ();
NS_ASSERT_MSG (enbApp != 0, "cannot retrieve EpcEnbApplication");
Ptr<EpcTestRrc> rrc = CreateObject<EpcTestRrc> ();
rrc->SetS1SapProvider (enbApp->GetS1SapProvider ());
enbApp->SetS1SapUser (rrc->GetS1SapUser ());
// we install the IP stack on UEs only
InternetStackHelper internet;
internet.Install (ues);
// assign IP address to UEs, and install applications
for (uint32_t u = 0; u < ues.GetN (); ++u)
{
Ptr<NetDevice> ueLteDevice = cellDevices.Get (u);
Ipv4InterfaceContainer ueIpIface = epcHelper->AssignUeIpv4Address (NetDeviceContainer (ueLteDevice));
Ptr<Node> ue = ues.Get (u);
// disable IP Forwarding on the UE. This is because we use
// CSMA broadcast MAC addresses for this test. The problem
// won't happen with a LteUeNetDevice.
ue->GetObject<Ipv4> ()->SetAttribute ("IpForward", BooleanValue (false));
uint16_t port = 1234;
PacketSinkHelper packetSinkHelper ("ns3::UdpSocketFactory", InetSocketAddress (Ipv4Address::GetAny (), port));
ApplicationContainer apps = packetSinkHelper.Install (ue);
apps.Start (Seconds (1.0));
apps.Stop (Seconds (10.0));
enbit->ues[u].serverApp = apps.Get (0)->GetObject<PacketSink> ();
Time interPacketInterval = Seconds (0.01);
UdpEchoClientHelper client (ueIpIface.GetAddress (0), port);
client.SetAttribute ("MaxPackets", UintegerValue (enbit->ues[u].numPkts));
client.SetAttribute ("Interval", TimeValue (interPacketInterval));
client.SetAttribute ("PacketSize", UintegerValue (enbit->ues[u].pktSize));
apps = client.Install (remoteHost);
apps.Start (Seconds (2.0));
apps.Stop (Seconds (10.0));
enbit->ues[u].clientApp = apps.Get (0);
uint64_t imsi = u+1;
epcHelper->AddUe (ueLteDevice, imsi);
epcHelper->ActivateEpsBearer (ueLteDevice, imsi, EpcTft::Default (), EpsBearer (EpsBearer::NGBR_VIDEO_TCP_DEFAULT));
enbApp->GetS1SapProvider ()->InitialUeMessage (imsi, (uint16_t) imsi);
}
}
Simulator::Run ();
for (std::vector<EnbDlTestData>::iterator enbit = m_enbDlTestData.begin ();
enbit < m_enbDlTestData.end ();
++enbit)
{
for (std::vector<UeDlTestData>::iterator ueit = enbit->ues.begin ();
ueit < enbit->ues.end ();
++ueit)
{
NS_TEST_ASSERT_MSG_EQ (ueit->serverApp->GetTotalRx (), (ueit->numPkts) * (ueit->pktSize), "wrong total received bytes");
}
}
Simulator::Destroy ();
}
int
main (int argc, char *argv[])
{
//
// Users may find it convenient to turn on explicit debugging
// for selected modules; the below lines suggest how to do this
//
// LogComponentEnable ("CsmaMulticastExample", LOG_LEVEL_INFO);
//
// Set up default values for the simulation.
//
// Select DIX/Ethernet II-style encapsulation (no LLC/Snap header)
Config::SetDefault ("ns3::CsmaNetDevice::EncapsulationMode", StringValue ("Dix"));
// Allow the user to override any of the defaults at
// run-time, via command-line arguments
CommandLine cmd;
cmd.Parse (argc, argv);
NS_LOG_INFO ("Create nodes.");
NodeContainer c;
c.Create (5);
// We will later want two subcontainers of these nodes, for the two LANs
NodeContainer c0 = NodeContainer (c.Get (0), c.Get (1), c.Get (2));
NodeContainer c1 = NodeContainer (c.Get (2), c.Get (3), c.Get (4));
NS_LOG_INFO ("Build Topology.");
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate (5000000)));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
// We will use these NetDevice containers later, for IP addressing
NetDeviceContainer nd0 = csma.Install (c0); // First LAN
NetDeviceContainer nd1 = csma.Install (c1); // Second LAN
NS_LOG_INFO ("Add IP Stack.");
InternetStackHelper internet;
internet.Install (c);
NS_LOG_INFO ("Assign IP Addresses.");
Ipv4AddressHelper ipv4Addr;
ipv4Addr.SetBase ("10.1.1.0", "255.255.255.0");
ipv4Addr.Assign (nd0);
ipv4Addr.SetBase ("10.1.2.0", "255.255.255.0");
ipv4Addr.Assign (nd1);
NS_LOG_INFO ("Configure multicasting.");
//
// Now we can configure multicasting. As described above, the multicast
// source is at node zero, which we assigned the IP address of 10.1.1.1
// earlier. We need to define a multicast group to send packets to. This
// can be any multicast address from 224.0.0.0 through 239.255.255.255
// (avoiding the reserved routing protocol addresses).
//
Ipv4Address multicastSource ("10.1.1.1");
Ipv4Address multicastGroup ("225.1.2.4");
// Now, we will set up multicast routing. We need to do three things:
// 1) Configure a (static) multicast route on node n2
// 2) Set up a default multicast route on the sender n0
// 3) Have node n4 join the multicast group
// We have a helper that can help us with static multicast
Ipv4StaticRoutingHelper multicast;
// 1) Configure a (static) multicast route on node n2 (multicastRouter)
Ptr<Node> multicastRouter = c.Get (2); // The node in question
Ptr<NetDevice> inputIf = nd0.Get (2); // The input NetDevice
NetDeviceContainer outputDevices; // A container of output NetDevices
outputDevices.Add (nd1.Get (0)); // (we only need one NetDevice here)
multicast.AddMulticastRoute (multicastRouter, multicastSource,
multicastGroup, inputIf, outputDevices);
// 2) Set up a default multicast route on the sender n0
Ptr<Node> sender = c.Get (0);
Ptr<NetDevice> senderIf = nd0.Get (0);
multicast.SetDefaultMulticastRoute (sender, senderIf);
//
// Create an OnOff application to send UDP datagrams from node zero to the
// multicast group (node four will be listening).
//
NS_LOG_INFO ("Create Applications.");
uint16_t multicastPort = 9; // Discard port (RFC 863)
// Configure a multicast packet generator that generates a packet
// every few seconds
OnOffHelper onoff ("ns3::UdpSocketFactory",
Address (InetSocketAddress (multicastGroup, multicastPort)));
onoff.SetConstantRate (DataRate ("255b/s"));
onoff.SetAttribute ("PacketSize", UintegerValue (128));
ApplicationContainer srcC = onoff.Install (c0.Get (0));
//
// Tell the application when to start and stop.
//
srcC.Start (Seconds (1.));
srcC.Stop (Seconds (10.));
// Create an optional packet sink to receive these packets
PacketSinkHelper sink ("ns3::UdpSocketFactory",
InetSocketAddress (Ipv4Address::GetAny (), multicastPort));
ApplicationContainer sinkC = sink.Install (c1.Get (2)); // Node n4
// Start the sink
sinkC.Start (Seconds (1.0));
sinkC.Stop (Seconds (10.0));
NS_LOG_INFO ("Configure Tracing.");
//
// Configure tracing of all enqueue, dequeue, and NetDevice receive events.
// Ascii trace output will be sent to the file "csma-multicast.tr"
//
AsciiTraceHelper ascii;
csma.EnableAsciiAll (ascii.CreateFileStream ("csma-multicast.tr"));
// Also configure some tcpdump traces; each interface will be traced.
// The output files will be named:
// csma-multicast-<nodeId>-<interfaceId>.pcap
// and can be read by the "tcpdump -r" command (use "-tt" option to
// display timestamps correctly)
csma.EnablePcapAll ("csma-multicast", false);
//
// Now, do the actual simulation.
//
NS_LOG_INFO ("Run Simulation.");
Simulator::Run ();
Simulator::Destroy ();
NS_LOG_INFO ("Done.");
}
int
main (int argc, char *argv[])
{
//
// Users may find it convenient to turn on explicit debugging
// for selected modules; the below lines suggest how to do this
//
#if 0
LogComponentEnable ("UdpEchoExample", LOG_LEVEL_INFO);
LogComponentEnable ("UdpEchoClientApplication", LOG_LEVEL_ALL);
LogComponentEnable ("UdpEchoServerApplication", LOG_LEVEL_ALL);
#endif
//
// Allow the user to override any of the defaults and the above Bind() at
// run-time, via command-line arguments
//
bool useV6 = false;
Address serverAddress;
CommandLine cmd;
cmd.AddValue ("useIpv6", "Use Ipv6", useV6);
cmd.Parse (argc, argv);
//
// Explicitly create the nodes required by the topology (shown above).
//
NS_LOG_INFO ("Create nodes.");
NodeContainer n;
n.Create (4);
InternetStackHelper internet;
internet.Install (n);
NS_LOG_INFO ("Create channels.");
//
// Explicitly create the channels required by the topology (shown above).
//
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate (5000000)));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
csma.SetDeviceAttribute ("Mtu", UintegerValue (1400));
NetDeviceContainer d = csma.Install (n);
//
// We've got the "hardware" in place. Now we need to add IP addresses.
//
NS_LOG_INFO ("Assign IP Addresses.");
if (useV6 == false)
{
Ipv4AddressHelper ipv4;
ipv4.SetBase ("10.1.1.0", "255.255.255.0");
Ipv4InterfaceContainer i = ipv4.Assign (d);
serverAddress = Address(i.GetAddress (1));
}
else
{
Ipv6AddressHelper ipv6;
ipv6.SetBase ("2001:0000:f00d:cafe::", Ipv6Prefix (64));
Ipv6InterfaceContainer i6 = ipv6.Assign (d);
serverAddress = Address(i6.GetAddress (1,1));
}
NS_LOG_INFO ("Create Applications.");
//
// Create a UdpEchoServer application on node one.
//
uint16_t port = 9; // well-known echo port number
UdpEchoServerHelper server (port);
ApplicationContainer apps = server.Install (n.Get (1));
apps.Start (Seconds (1.0));
apps.Stop (Seconds (10.0));
//
// Create a UdpEchoClient application to send UDP datagrams from node zero to
// node one.
//
uint32_t packetSize = 1024;
uint32_t maxPacketCount = 1;
Time interPacketInterval = Seconds (1.);
UdpEchoClientHelper client (serverAddress, port);
client.SetAttribute ("MaxPackets", UintegerValue (maxPacketCount));
client.SetAttribute ("Interval", TimeValue (interPacketInterval));
client.SetAttribute ("PacketSize", UintegerValue (packetSize));
apps = client.Install (n.Get (0));
apps.Start (Seconds (2.0));
apps.Stop (Seconds (10.0));
#if 0
//
// Users may find it convenient to initialize echo packets with actual data;
// the below lines suggest how to do this
//
client.SetFill (apps.Get (0), "Hello World");
client.SetFill (apps.Get (0), 0xa5, 1024);
uint8_t fill[] = { 0, 1, 2, 3, 4, 5, 6};
client.SetFill (apps.Get (0), fill, sizeof(fill), 1024);
#endif
AsciiTraceHelper ascii;
csma.EnableAsciiAll (ascii.CreateFileStream ("udp-echo.tr"));
csma.EnablePcapAll ("udp-echo", false);
//
// Now, do the actual simulation.
//
NS_LOG_INFO ("Run Simulation.");
Simulator::Run ();
Simulator::Destroy ();
NS_LOG_INFO ("Done.");
}
// Test derived from examples/routing/dynamic-global-routing.cc
//
// Network topology
//
// n0
// \ p-p
// \ (shared csma/cd)
// n2 -------------------------n3
// / | |
// / p-p n4 n5 ---------- n6
// n1 p-p
// | |
// ----------------------------------------
// p-p
//
// Test that for node n6, the interface facing n5 receives packets at
// times (1-2), (4-6), (8-10), (11-12), (14-16) and the interface
// facing n1 receives packets at times (2-4), (6-8), (12-13)
//
void
DynamicGlobalRoutingTestCase::DoRun (void)
{
// The below value configures the default behavior of global routing.
// By default, it is disabled. To respond to interface events, set to true
Config::SetDefault ("ns3::Ipv4GlobalRouting::RespondToInterfaceEvents", BooleanValue (true));
NodeContainer c;
c.Create (7);
NodeContainer n0n2 = NodeContainer (c.Get (0), c.Get (2));
NodeContainer n1n2 = NodeContainer (c.Get (1), c.Get (2));
NodeContainer n5n6 = NodeContainer (c.Get (5), c.Get (6));
NodeContainer n1n6 = NodeContainer (c.Get (1), c.Get (6));
NodeContainer n2345 = NodeContainer (c.Get (2), c.Get (3), c.Get (4), c.Get (5));
InternetStackHelper internet;
internet.Install (c);
// We create the channels first without any IP addressing information
PointToPointHelper p2p;
p2p.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
p2p.SetChannelAttribute ("Delay", StringValue ("2ms"));
NetDeviceContainer d0d2 = p2p.Install (n0n2);
NetDeviceContainer d1d6 = p2p.Install (n1n6);
NetDeviceContainer d1d2 = p2p.Install (n1n2);
p2p.SetDeviceAttribute ("DataRate", StringValue ("1500kbps"));
p2p.SetChannelAttribute ("Delay", StringValue ("10ms"));
NetDeviceContainer d5d6 = p2p.Install (n5n6);
// We create the channels first without any IP addressing information
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", StringValue ("5Mbps"));
csma.SetChannelAttribute ("Delay", StringValue ("2ms"));
NetDeviceContainer d2345 = csma.Install (n2345);
// Later, we add IP addresses.
Ipv4AddressHelper ipv4;
ipv4.SetBase ("10.1.1.0", "255.255.255.0");
ipv4.Assign (d0d2);
ipv4.SetBase ("10.1.2.0", "255.255.255.0");
ipv4.Assign (d1d2);
ipv4.SetBase ("10.1.3.0", "255.255.255.0");
Ipv4InterfaceContainer i5i6 = ipv4.Assign (d5d6);
ipv4.SetBase ("10.250.1.0", "255.255.255.0");
ipv4.Assign (d2345);
ipv4.SetBase ("172.16.1.0", "255.255.255.0");
Ipv4InterfaceContainer i1i6 = ipv4.Assign (d1d6);
// Create router nodes, initialize routing database and set up the routing
// tables in the nodes.
Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
// Create the OnOff application to send UDP datagrams of size
// 210 bytes at a rate of 448 Kb/s
uint16_t port = 9; // Discard port (RFC 863)
OnOffHelper onoff ("ns3::UdpSocketFactory",
InetSocketAddress (i5i6.GetAddress (1), port));
onoff.SetConstantRate (DataRate ("2kbps"));
onoff.SetAttribute ("PacketSize", UintegerValue (50));
ApplicationContainer apps = onoff.Install (c.Get (1));
apps.Start (Seconds (1.0));
apps.Stop (Seconds (10.0));
// Create a second OnOff application to send UDP datagrams of size
// 210 bytes at a rate of 448 Kb/s
OnOffHelper onoff2 ("ns3::UdpSocketFactory",
InetSocketAddress (i1i6.GetAddress (1), port));
onoff2.SetAttribute ("OnTime", StringValue ("ns3::ConstantRandomVariable[Constant=1]"));
onoff2.SetAttribute ("OffTime", StringValue ("ns3::ConstantRandomVariable[Constant=0]"));
onoff2.SetAttribute ("DataRate", StringValue ("2kbps"));
onoff2.SetAttribute ("PacketSize", UintegerValue (50));
ApplicationContainer apps2 = onoff2.Install (c.Get (1));
apps2.Start (Seconds (11.0));
apps2.Stop (Seconds (16.0));
// Create an optional packet sink to receive these packets
TypeId tid = TypeId::LookupByName ("ns3::UdpSocketFactory");
Ptr<Socket> sink2 = Socket::CreateSocket (c.Get (6), tid);
sink2->Bind (Address (InetSocketAddress (Ipv4Address::GetAny (), port)));
sink2->Listen ();
sink2->ShutdownSend ();
sink2->SetRecvPktInfo (true);
sink2->SetRecvCallback (MakeCallback (&DynamicGlobalRoutingTestCase::HandleRead, this));
Ptr<Node> n1 = c.Get (1);
Ptr<Ipv4> ipv41 = n1->GetObject<Ipv4> ();
// The first ifIndex is 0 for loopback, then the first p2p is numbered 1,
// then the next p2p is numbered 2
uint32_t ipv4ifIndex1 = 2;
// Trace receptions
Config::Connect ("/NodeList/6/ApplicationList/*/$ns3::PacketSink/Rx",
MakeCallback (&DynamicGlobalRoutingTestCase::SinkRx, this));
Simulator::Schedule (Seconds (2),&Ipv4::SetDown,ipv41, ipv4ifIndex1);
Simulator::Schedule (Seconds (4),&Ipv4::SetUp,ipv41, ipv4ifIndex1);
Ptr<Node> n6 = c.Get (6);
Ptr<Ipv4> ipv46 = n6->GetObject<Ipv4> ();
// The first ifIndex is 0 for loopback, then the first p2p is numbered 1,
// then the next p2p is numbered 2
uint32_t ipv4ifIndex6 = 2;
Simulator::Schedule (Seconds (6),&Ipv4::SetDown,ipv46, ipv4ifIndex6);
Simulator::Schedule (Seconds (8),&Ipv4::SetUp,ipv46, ipv4ifIndex6);
Simulator::Schedule (Seconds (12),&Ipv4::SetDown,ipv41, ipv4ifIndex1);
Simulator::Schedule (Seconds (14),&Ipv4::SetUp,ipv41, ipv4ifIndex1);
Simulator::Run ();
NS_TEST_ASSERT_MSG_EQ (m_count, 68, "Dynamic global routing did not deliver all packets");
// Test that for node n6, the interface facing n5 receives packets at
// times (1-2), (4-6), (8-10), (11-12), (14-16) and the interface
// facing n1 receives packets at times (2-4), (6-8), (12-13)
NS_TEST_ASSERT_MSG_EQ (m_firstInterface[1], 4, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_secondInterface[2], 5, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_secondInterface[3], 5, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_firstInterface[4], 5, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_firstInterface[5], 5, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_secondInterface[6], 5, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_secondInterface[7], 5, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_firstInterface[8], 5, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_firstInterface[9], 5, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_firstInterface[10], 0, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_firstInterface[11], 4, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_secondInterface[12], 5, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_secondInterface[13], 5, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_firstInterface[14], 5, "Dynamic global routing did not deliver all packets");
NS_TEST_ASSERT_MSG_EQ (m_firstInterface[15], 5, "Dynamic global routing did not deliver all packets");
Simulator::Destroy ();
}
//
// Example of the sending of a datagram to a broadcast address
//
// Network topology
// ==============
// | |
// n0 n1 n2
// | |
// ==========
//
// n0 originates UDP broadcast to 255.255.255.255/discard port, which
// is replicated and received on both n1 and n2
//
void
CsmaBroadcastTestCase::DoRun (void)
{
NodeContainer c;
c.Create (3);
NodeContainer c0 = NodeContainer (c.Get (0), c.Get (1));
NodeContainer c1 = NodeContainer (c.Get (0), c.Get (2));
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate (5000000)));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
NetDeviceContainer n0 = csma.Install (c0);
NetDeviceContainer n1 = csma.Install (c1);
InternetStackHelper internet;
internet.Install (c);
Ipv4AddressHelper ipv4;
ipv4.SetBase ("10.1.0.0", "255.255.255.0");
ipv4.Assign (n0);
ipv4.SetBase ("192.168.1.0", "255.255.255.0");
ipv4.Assign (n1);
// RFC 863 discard port ("9") indicates packet should be thrown away
// by the system. We allow this silent discard to be overridden
// by the PacketSink application.
uint16_t port = 9;
// Create the OnOff application to send UDP datagrams from n0.
//
// Make packets be sent about every DefaultPacketSize / DataRate =
// 4096 bits / (5000 bits/second) = 0.82 second.
OnOffHelper onoff ("ns3::UdpSocketFactory",
Address (InetSocketAddress (Ipv4Address ("255.255.255.255"), port)));
onoff.SetConstantRate (DataRate (5000));
ApplicationContainer app = onoff.Install (c0.Get (0));
// Start the application
app.Start (Seconds (1.0));
app.Stop (Seconds (10.0));
// Create an optional packet sink to receive these packets
PacketSinkHelper sink ("ns3::UdpSocketFactory",
Address (InetSocketAddress (Ipv4Address::GetAny (), port)));
app = sink.Install (c0.Get (1));
app.Add (sink.Install (c1.Get (1)));
app.Start (Seconds (1.0));
app.Stop (Seconds (10.0));
// Trace receptions
Config::ConnectWithoutContext ("/NodeList/1/ApplicationList/0/$ns3::PacketSink/Rx", MakeCallback (&CsmaBroadcastTestCase::SinkRxNode1, this));
Config::ConnectWithoutContext ("/NodeList/2/ApplicationList/0/$ns3::PacketSink/Rx", MakeCallback (&CsmaBroadcastTestCase::SinkRxNode2, this));
Simulator::Run ();
Simulator::Destroy ();
// We should have sent and received 10 packets
NS_TEST_ASSERT_MSG_EQ (m_countNode1, 10, "Node 1 should have received 10 packets");
NS_TEST_ASSERT_MSG_EQ (m_countNode2, 10, "Node 2 should have received 10 packets");
}
// Network topology
//
// Lan1
// ===========
// | | |
// n0 n1 n2 n3 n4
// | | |
// ===========
// Lan0
//
// - Multicast source is at node n0;
// - Multicast forwarded by node n2 onto LAN1;
// - Nodes n0, n1, n2, n3, and n4 receive the multicast frame.
// - Node n4 listens for the data
//
void
CsmaMulticastTestCase::DoRun (void)
{
//
// Set up default values for the simulation.
//
// Select DIX/Ethernet II-style encapsulation (no LLC/Snap header)
Config::SetDefault ("ns3::CsmaNetDevice::EncapsulationMode", StringValue ("Dix"));
NodeContainer c;
c.Create (5);
// We will later want two subcontainers of these nodes, for the two LANs
NodeContainer c0 = NodeContainer (c.Get (0), c.Get (1), c.Get (2));
NodeContainer c1 = NodeContainer (c.Get (2), c.Get (3), c.Get (4));
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate (5000000)));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
// We will use these NetDevice containers later, for IP addressing
NetDeviceContainer nd0 = csma.Install (c0); // First LAN
NetDeviceContainer nd1 = csma.Install (c1); // Second LAN
InternetStackHelper internet;
internet.Install (c);
Ipv4AddressHelper ipv4Addr;
ipv4Addr.SetBase ("10.1.1.0", "255.255.255.0");
ipv4Addr.Assign (nd0);
ipv4Addr.SetBase ("10.1.2.0", "255.255.255.0");
ipv4Addr.Assign (nd1);
//
// Now we can configure multicasting. As described above, the multicast
// source is at node zero, which we assigned the IP address of 10.1.1.1
// earlier. We need to define a multicast group to send packets to. This
// can be any multicast address from 224.0.0.0 through 239.255.255.255
// (avoiding the reserved routing protocol addresses).
//
Ipv4Address multicastSource ("10.1.1.1");
Ipv4Address multicastGroup ("225.1.2.4");
// Now, we will set up multicast routing. We need to do three things:
// 1) Configure a (static) multicast route on node n2
// 2) Set up a default multicast route on the sender n0
// 3) Have node n4 join the multicast group
// We have a helper that can help us with static multicast
Ipv4StaticRoutingHelper multicast;
// 1) Configure a (static) multicast route on node n2 (multicastRouter)
Ptr<Node> multicastRouter = c.Get (2); // The node in question
Ptr<NetDevice> inputIf = nd0.Get (2); // The input NetDevice
NetDeviceContainer outputDevices; // A container of output NetDevices
outputDevices.Add (nd1.Get (0)); // (we only need one NetDevice here)
multicast.AddMulticastRoute (multicastRouter, multicastSource,
multicastGroup, inputIf, outputDevices);
// 2) Set up a default multicast route on the sender n0
Ptr<Node> sender = c.Get (0);
Ptr<NetDevice> senderIf = nd0.Get (0);
multicast.SetDefaultMulticastRoute (sender, senderIf);
//
// Create an OnOff application to send UDP datagrams from node zero to the
// multicast group (node four will be listening).
//
uint16_t multicastPort = 9; // Discard port (RFC 863)
// Configure a multicast packet generator.
//
// Make packets be sent about every defaultPacketSize / dataRate =
// 4096 bits / (5000 bits/second) = 0.82 second.
OnOffHelper onoff ("ns3::UdpSocketFactory",
Address (InetSocketAddress (multicastGroup, multicastPort)));
onoff.SetConstantRate (DataRate (5000));
ApplicationContainer srcC = onoff.Install (c0.Get (0));
//
// Tell the application when to start and stop.
//
srcC.Start (Seconds (1.));
srcC.Stop (Seconds (10.));
// Create an optional packet sink to receive these packets
PacketSinkHelper sink ("ns3::UdpSocketFactory",
InetSocketAddress (Ipv4Address::GetAny (), multicastPort));
ApplicationContainer sinkC = sink.Install (c1.Get (2)); // Node n4
// Start the sink
sinkC.Start (Seconds (1.0));
sinkC.Stop (Seconds (10.0));
// Trace receptions
Config::ConnectWithoutContext ("/NodeList/4/ApplicationList/0/$ns3::PacketSink/Rx", MakeCallback (&CsmaMulticastTestCase::SinkRx, this));
//
// Now, do the actual simulation.
//
Simulator::Run ();
Simulator::Destroy ();
// We should have sent and received 10 packets
NS_TEST_ASSERT_MSG_EQ (m_count, 10, "Node 4 should have received 10 packets");
}
int main (int argc, char** argv)
{
bool verbose = false;
CommandLine cmd;
cmd.AddValue ("verbose", "turn on log components", verbose);
cmd.Parse (argc, argv);
if (verbose)
{
LogComponentEnable ("Ipv6L3Protocol", LOG_LEVEL_ALL);
LogComponentEnable ("Icmpv6L4Protocol", LOG_LEVEL_ALL);
LogComponentEnable ("Ipv6StaticRouting", LOG_LEVEL_ALL);
LogComponentEnable ("Ipv6Interface", LOG_LEVEL_ALL);
LogComponentEnable ("Ping6Application", LOG_LEVEL_ALL);
}
NS_LOG_INFO ("Create nodes.");
Ptr<Node> n0 = CreateObject<Node> ();
Ptr<Node> r = CreateObject<Node> ();
Ptr<Node> n1 = CreateObject<Node> ();
NodeContainer net1 (n0, r);
NodeContainer net2 (r, n1);
NodeContainer all (n0, r, n1);
NS_LOG_INFO ("Create IPv6 Internet Stack");
InternetStackHelper internetv6;
internetv6.Install (all);
NS_LOG_INFO ("Create channels.");
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (5000000));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
NetDeviceContainer d1 = csma.Install (net1);
NetDeviceContainer d2 = csma.Install (net2);
NS_LOG_INFO ("Create networks and assign IPv6 Addresses.");
Ipv6AddressHelper ipv6;
ipv6.SetBase (Ipv6Address ("2001:1::"), Ipv6Prefix (64));
Ipv6InterfaceContainer i1 = ipv6.Assign (d1);
i1.SetForwarding (1, true);
i1.SetDefaultRouteInAllNodes (1);
ipv6.SetBase (Ipv6Address ("2001:2::"), Ipv6Prefix (64));
Ipv6InterfaceContainer i2 = ipv6.Assign (d2);
i2.SetForwarding (0, true);
i2.SetDefaultRouteInAllNodes (0);
Ipv6StaticRoutingHelper routingHelper;
Ptr<OutputStreamWrapper> routingStream = Create<OutputStreamWrapper> (&std::cout);
routingHelper.PrintRoutingTableAt (Seconds (0), n0, routingStream);
/* Create a Ping6 application to send ICMPv6 echo request from n0 to n1 via r */
uint32_t packetSize = 4096;
uint32_t maxPacketCount = 5;
Time interPacketInterval = Seconds (1.0);
Ping6Helper ping6;
ping6.SetLocal (i1.GetAddress (0, 1));
ping6.SetRemote (i2.GetAddress (1, 1));
ping6.SetAttribute ("MaxPackets", UintegerValue (maxPacketCount));
ping6.SetAttribute ("Interval", TimeValue (interPacketInterval));
ping6.SetAttribute ("PacketSize", UintegerValue (packetSize));
ApplicationContainer apps = ping6.Install (net1.Get (0));
apps.Start (Seconds (2.0));
apps.Stop (Seconds (20.0));
AsciiTraceHelper ascii;
csma.EnableAsciiAll (ascii.CreateFileStream ("fragmentation-ipv6.tr"));
csma.EnablePcapAll (std::string ("fragmentation-ipv6"), true);
NS_LOG_INFO ("Run Simulation.");
Simulator::Run ();
Simulator::Destroy ();
NS_LOG_INFO ("Done.");
}