コード例 #1
0
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 ();
}
コード例 #2
0
//
// 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");
}
コード例 #3
0
//
// 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");
}
コード例 #4
0
ファイル: ndn-csma.cpp プロジェクト: bit-oh-my-god/ndnSIM
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;
}
コード例 #5
0
// 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 ();
}
コード例 #6
0
ファイル: udp-echo.cpp プロジェクト: shuiziliuBUPT/HelloWorld
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.");
}
コード例 #7
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");
}
コード例 #8
0
// 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");
}
コード例 #9
0
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.");
}
コード例 #10
0
// 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");
}
コード例 #11
0
//
// 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");
}
コード例 #12
0
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.");
}
コード例 #13
0
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 ();
}
コード例 #14
0
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 ();
}
コード例 #15
0
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 ();
}
コード例 #16
0
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.");
}
コード例 #17
0
// 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");
}
コード例 #18
0
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.");
}