/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ /* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation; * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Based on simple-global-routing.cc * ns-2 simple.tcl script (ported from ns-2) * Originally authored by Steve McCanne, 12/19/1996 */ // Network topology // // n0 // \ 5 Mb/s, 2ms // \ 1.5Mb/s, 10ms // n2 -------------------------n3 // / // / 5 Mb/s, 2ms // n1 // // - all links are point-to-point links with indicated one-way BW/delay // - CBR/UDP flows from n0 to n3, and from n3 to n1 // - FTP/TCP flow from n0 to n3, starting at time 1.2 to time 1.35 sec. // - UDP packet size of 210 bytes, with per-packet interval 0.00375 sec. // (i.e., DataRate of 448,000 bps) // - DropTail queues // - Tracing of queues and packet receptions to file "virtual-net-device.tr" // Tunneling changes (relative to the simple-global-routing example): // n0 will receive an extra virtual interface with address 11.0.0.1 // n1 will also receive an extra virtual interface with the same address 11.0.0.1 // n3 will receive an extra virtual interface with address 11.0.0.254 // The flows will be between 11.0.0.x (tunnel) addresses instead of 10.1.x.y ones // n3 will decide, on a per-packet basis, via random number, whether to // send the packet to n0 or to n1. // // Note: here we create a tunnel where IP packets are tunneled over // UDP/IP, but tunneling directly IP-over-IP would also be possible; // see src/node/ipv4-raw-socket-factory.h. #include #include #include #include #include "ns3/core-module.h" #include "ns3/simulator-module.h" #include "ns3/node-module.h" #include "ns3/helper-module.h" #include "ns3/virtual-net-device.h" using namespace ns3; NS_LOG_COMPONENT_DEFINE ("VirtualNetDeviceExample"); class Tunnel { Ptr m_n3Socket; Ptr m_n0Socket; Ptr m_n1Socket; Ipv4Address m_n3Address; Ipv4Address m_n0Address; Ipv4Address m_n1Address; UniformVariable m_rng; Ptr m_n0Tap; Ptr m_n1Tap; Ptr m_n3Tap; bool N0VirtualSend (Ptr packet, const Address& source, const Address& dest, uint16_t protocolNumber) { NS_LOG_DEBUG ("Send to " << m_n3Address << ": " << *packet); m_n0Socket->SendTo (packet, 0, InetSocketAddress (m_n3Address, 667)); return true; } bool N1VirtualSend (Ptr packet, const Address& source, const Address& dest, uint16_t protocolNumber) { NS_LOG_DEBUG ("Send to " << m_n3Address << ": " << *packet); m_n1Socket->SendTo (packet, 0, InetSocketAddress (m_n3Address, 667)); return true; } bool N3VirtualSend (Ptr packet, const Address& source, const Address& dest, uint16_t protocolNumber) { if (m_rng.GetValue () < 0.25) { NS_LOG_DEBUG ("Send to " << m_n0Address << ": " << *packet); m_n3Socket->SendTo (packet, 0, InetSocketAddress (m_n0Address, 667)); } else { NS_LOG_DEBUG ("Send to " << m_n1Address << ": " << *packet); m_n3Socket->SendTo (packet, 0, InetSocketAddress (m_n1Address, 667)); } return true; } void N3SocketRecv (Ptr socket) { Ptr packet = socket->Recv (65535, 0); NS_LOG_DEBUG ("N3SocketRecv: " << *packet); SocketAddressTag socketAddressTag; packet->RemovePacketTag (socketAddressTag); m_n3Tap->Receive (packet, 0x0800, m_n3Tap->GetAddress (), m_n3Tap->GetAddress (), NetDevice::PACKET_HOST); } void N0SocketRecv (Ptr socket) { Ptr packet = socket->Recv (65535, 0); NS_LOG_DEBUG ("N0SocketRecv: " << *packet); SocketAddressTag socketAddressTag; packet->RemovePacketTag (socketAddressTag); m_n0Tap->Receive (packet, 0x0800, m_n0Tap->GetAddress (), m_n0Tap->GetAddress (), NetDevice::PACKET_HOST); } void N1SocketRecv (Ptr socket) { Ptr packet = socket->Recv (65535, 0); NS_LOG_DEBUG ("N1SocketRecv: " << *packet); SocketAddressTag socketAddressTag; packet->RemovePacketTag (socketAddressTag); m_n1Tap->Receive (packet, 0x0800, m_n1Tap->GetAddress (), m_n1Tap->GetAddress (), NetDevice::PACKET_HOST); } public: Tunnel (Ptr n3, Ptr n0, Ptr n1, Ipv4Address n3Addr, Ipv4Address n0Addr, Ipv4Address n1Addr) : m_n3Address (n3Addr), m_n0Address (n0Addr), m_n1Address (n1Addr) { m_n3Socket = Socket::CreateSocket (n3, TypeId::LookupByName ("ns3::UdpSocketFactory")); m_n3Socket->Bind (InetSocketAddress (Ipv4Address::GetAny (), 667)); m_n3Socket->SetRecvCallback (MakeCallback (&Tunnel::N3SocketRecv, this)); m_n0Socket = Socket::CreateSocket (n0, TypeId::LookupByName ("ns3::UdpSocketFactory")); m_n0Socket->Bind (InetSocketAddress (Ipv4Address::GetAny (), 667)); m_n0Socket->SetRecvCallback (MakeCallback (&Tunnel::N0SocketRecv, this)); m_n1Socket = Socket::CreateSocket (n1, TypeId::LookupByName ("ns3::UdpSocketFactory")); m_n1Socket->Bind (InetSocketAddress (Ipv4Address::GetAny (), 667)); m_n1Socket->SetRecvCallback (MakeCallback (&Tunnel::N1SocketRecv, this)); // n0 tap device m_n0Tap = CreateObject (); m_n0Tap->SetAddress (Mac48Address ("11:00:01:02:03:01")); m_n0Tap->SetSendCallback (MakeCallback (&Tunnel::N0VirtualSend, this)); n0->AddDevice (m_n0Tap); Ptr ipv4 = n0->GetObject (); uint32_t i = ipv4->AddInterface (m_n0Tap); ipv4->AddAddress (i, Ipv4InterfaceAddress (Ipv4Address ("11.0.0.1"), Ipv4Mask ("255.255.255.0"))); ipv4->SetUp (i); // n1 tap device m_n1Tap = CreateObject (); m_n1Tap->SetAddress (Mac48Address ("11:00:01:02:03:02")); m_n1Tap->SetSendCallback (MakeCallback (&Tunnel::N1VirtualSend, this)); n1->AddDevice (m_n1Tap); ipv4 = n1->GetObject (); i = ipv4->AddInterface (m_n1Tap); ipv4->AddAddress (i, Ipv4InterfaceAddress (Ipv4Address ("11.0.0.1"), Ipv4Mask ("255.255.255.0"))); ipv4->SetUp (i); // n3 tap device m_n3Tap = CreateObject (); m_n3Tap->SetAddress (Mac48Address ("11:00:01:02:03:04")); m_n3Tap->SetSendCallback (MakeCallback (&Tunnel::N3VirtualSend, this)); n3->AddDevice (m_n3Tap); ipv4 = n3->GetObject (); i = ipv4->AddInterface (m_n3Tap); ipv4->AddAddress (i, Ipv4InterfaceAddress (Ipv4Address ("11.0.0.254"), Ipv4Mask ("255.255.255.0"))); ipv4->SetUp (i); } }; 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 ("VirtualNetDeviceExample", LOG_LEVEL_INFO); #endif Packet::EnablePrinting (); // Set up some default values for the simulation. Use the Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (210)); Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("448kb/s")); //DefaultValue::Bind ("DropTailQueue::m_maxPackets", 30); // Allow the user to override any of the defaults and the above // DefaultValue::Bind ()s at run-time, via command-line arguments CommandLine cmd; cmd.Parse (argc, argv); // Here, we will explicitly create four nodes. In more sophisticated // topologies, we could configure a node factory. NS_LOG_INFO ("Create nodes."); NodeContainer c; c.Create (4); NodeContainer n0n2 = NodeContainer (c.Get(0), c.Get (2)); NodeContainer n1n2 = NodeContainer (c.Get(1), c.Get (2)); NodeContainer n3n2 = NodeContainer (c.Get(3), c.Get (2)); InternetStackHelper internet; internet.Install (c); // We create the channels first without any IP addressing information NS_LOG_INFO ("Create channels."); PointToPointHelper p2p; p2p.SetDeviceAttribute ("DataRate", StringValue ("5Mbps")); p2p.SetChannelAttribute ("Delay", StringValue ("2ms")); NetDeviceContainer d0d2 = p2p.Install (n0n2); NetDeviceContainer d1d2 = p2p.Install (n1n2); p2p.SetDeviceAttribute ("DataRate", StringValue ("1500kbps")); p2p.SetChannelAttribute ("Delay", StringValue ("10ms")); NetDeviceContainer d3d2 = p2p.Install (n3n2); // Later, we add IP addresses. NS_LOG_INFO ("Assign IP Addresses."); Ipv4AddressHelper ipv4; ipv4.SetBase ("10.1.1.0", "255.255.255.0"); Ipv4InterfaceContainer i0i2 = ipv4.Assign (d0d2); ipv4.SetBase ("10.1.2.0", "255.255.255.0"); Ipv4InterfaceContainer i1i2 = ipv4.Assign (d1d2); ipv4.SetBase ("10.1.3.0", "255.255.255.0"); Ipv4InterfaceContainer i3i2 = ipv4.Assign (d3d2); // Create router nodes, initialize routing database and set up the routing // tables in the nodes. Ipv4GlobalRoutingHelper::PopulateRoutingTables (); // Add the tunnels Tunnel tunnel (c.Get (3), c.Get (0), c.Get (1), i3i2.GetAddress (0), i0i2.GetAddress (0), i1i2.GetAddress (0)); // Create the OnOff application to send UDP datagrams of size // 210 bytes at a rate of 448 Kb/s NS_LOG_INFO ("Create Applications."); uint16_t port = 9; // Discard port (RFC 863) OnOffHelper onoff ("ns3::UdpSocketFactory", Address (InetSocketAddress (Ipv4Address ("11.0.0.254"), port))); onoff.SetAttribute ("OnTime", RandomVariableValue (ConstantVariable (1))); onoff.SetAttribute ("OffTime", RandomVariableValue (ConstantVariable (0))); ApplicationContainer apps = onoff.Install (c.Get (0)); apps.Start (Seconds (1.0)); apps.Stop (Seconds (10.0)); // Create a packet sink to receive these packets PacketSinkHelper sink ("ns3::UdpSocketFactory", Address (InetSocketAddress (Ipv4Address::GetAny (), port))); apps = sink.Install (c.Get (3)); apps.Start (Seconds (1.0)); //apps.Stop (Seconds (10.0)); // Create a similar flow from n3 to n1, starting at time 1.1 seconds onoff.SetAttribute ("Remote", AddressValue (InetSocketAddress (Ipv4Address ("11.0.0.1"), port))); apps = onoff.Install (c.Get (3)); apps.Start (Seconds (1.1)); apps.Stop (Seconds (10.0)); // Create a packet sink to receive these packets apps = sink.Install (c.Get (1)); apps.Start (Seconds (1.1)); //apps.Stop (Seconds (10.0)); std::ofstream ascii; ascii.open ("virtual-net-device.tr"); PointToPointHelper::EnablePcapAll ("virtual-net-device"); PointToPointHelper::EnableAsciiAll (ascii); NS_LOG_INFO ("Run Simulation."); Simulator::Run (); Simulator::Destroy (); NS_LOG_INFO ("Done."); return 0; }