162 lines
6.0 KiB
C++
162 lines
6.0 KiB
C++
/*
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* Copyright (c) 2008-2009 Strasbourg University
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* Copyright (c) 2013 Universita' di Firenze
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* Copyright (c) 2022 Jadavpur University
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: David Gross <gdavid.devel@gmail.com>
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* Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
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* Modified by Akash Mondal <a98mondal@gmail.com>
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*/
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// Network topology
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// //
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// // Src n0 r1 n1 r2 n2
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// // | _ | _ |
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// // =========|_|============|_|=========
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// // MTU 5000 2000 1500
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// //
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// // - Tracing of queues and packet receptions to file "fragmentation-ipv6-PMTU.tr"
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#include "ns3/applications-module.h"
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#include "ns3/core-module.h"
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#include "ns3/csma-module.h"
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#include "ns3/internet-module.h"
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#include "ns3/ipv6-routing-table-entry.h"
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#include "ns3/ipv6-static-routing-helper.h"
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#include "ns3/network-module.h"
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#include "ns3/point-to-point-module.h"
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#include <fstream>
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE("FragmentationIpv6PmtuExample");
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int
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main(int argc, char** argv)
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{
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bool verbose = false;
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CommandLine cmd(__FILE__);
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cmd.AddValue("verbose", "turn on log components", verbose);
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cmd.Parse(argc, argv);
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if (verbose)
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{
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LogComponentEnable("Ipv6L3Protocol", LOG_LEVEL_ALL);
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LogComponentEnable("Icmpv6L4Protocol", LOG_LEVEL_ALL);
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LogComponentEnable("Ipv6StaticRouting", LOG_LEVEL_ALL);
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LogComponentEnable("Ipv6Interface", LOG_LEVEL_ALL);
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LogComponentEnable("UdpEchoClientApplication", LOG_LEVEL_ALL);
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LogComponentEnable("UdpEchoServerApplication", LOG_LEVEL_ALL);
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}
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LogComponentEnable("UdpEchoClientApplication", LOG_LEVEL_INFO);
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NS_LOG_INFO("Create nodes.");
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Ptr<Node> n0 = CreateObject<Node>();
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Ptr<Node> r1 = CreateObject<Node>();
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Ptr<Node> n1 = CreateObject<Node>();
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Ptr<Node> r2 = CreateObject<Node>();
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Ptr<Node> n2 = CreateObject<Node>();
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NodeContainer net1(n0, r1);
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NodeContainer net2(r1, n1, r2);
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NodeContainer net3(r2, n2);
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NodeContainer all(n0, r1, n1, r2, n2);
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NS_LOG_INFO("Create IPv6 Internet Stack");
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InternetStackHelper internetv6;
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internetv6.Install(all);
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NS_LOG_INFO("Create channels.");
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CsmaHelper csma;
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csma.SetChannelAttribute("DataRate", DataRateValue(5000000));
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csma.SetChannelAttribute("Delay", TimeValue(MilliSeconds(2)));
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csma.SetDeviceAttribute("Mtu", UintegerValue(2000));
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NetDeviceContainer d2 = csma.Install(net2); // CSMA Network with MTU 2000
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csma.SetDeviceAttribute("Mtu", UintegerValue(5000));
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NetDeviceContainer d1 = csma.Install(net1); // CSMA Network with MTU 5000
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PointToPointHelper pointToPoint;
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pointToPoint.SetDeviceAttribute("DataRate", DataRateValue(5000000));
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pointToPoint.SetChannelAttribute("Delay", StringValue("2ms"));
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pointToPoint.SetDeviceAttribute("Mtu", UintegerValue(1500));
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NetDeviceContainer d3 = pointToPoint.Install(net3); // P2P Network with MTU 1500
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NS_LOG_INFO("Create networks and assign IPv6 Addresses.");
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Ipv6AddressHelper ipv6;
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ipv6.SetBase(Ipv6Address("2001:1::"), Ipv6Prefix(64));
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Ipv6InterfaceContainer i1 = ipv6.Assign(d1);
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i1.SetForwarding(1, true);
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i1.SetDefaultRouteInAllNodes(1);
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ipv6.SetBase(Ipv6Address("2001:2::"), Ipv6Prefix(64));
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Ipv6InterfaceContainer i2 = ipv6.Assign(d2);
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i2.SetForwarding(0, true);
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i2.SetDefaultRouteInAllNodes(0);
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i2.SetForwarding(1, true);
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i2.SetDefaultRouteInAllNodes(0);
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i2.SetForwarding(2, true);
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i2.SetDefaultRouteInAllNodes(2);
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ipv6.SetBase(Ipv6Address("2001:3::"), Ipv6Prefix(64));
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Ipv6InterfaceContainer i3 = ipv6.Assign(d3);
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i3.SetForwarding(0, true);
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i3.SetDefaultRouteInAllNodes(0);
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Ptr<OutputStreamWrapper> routingStream = Create<OutputStreamWrapper>(&std::cout);
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Ipv6RoutingHelper::PrintRoutingTableAt(Seconds(0), r1, routingStream);
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// Create an UDP Echo server on n2
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UdpEchoServerHelper echoServer(42);
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ApplicationContainer serverApps = echoServer.Install(n2);
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serverApps.Start(Seconds(0.0));
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serverApps.Stop(Seconds(30.0));
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uint32_t maxPacketCount = 5;
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// Create an UDP Echo client on n1 to send UDP packets to n2 via r1
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uint32_t packetSizeN1 = 1600; // Packet should fragment as intermediate link MTU is 1500
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UdpEchoClientHelper echoClient(i3.GetAddress(1, 1), 42);
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echoClient.SetAttribute("PacketSize", UintegerValue(packetSizeN1));
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echoClient.SetAttribute("MaxPackets", UintegerValue(maxPacketCount));
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ApplicationContainer clientAppsN1 = echoClient.Install(n1);
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clientAppsN1.Start(Seconds(2.0));
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clientAppsN1.Stop(Seconds(10.0));
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// Create an UDP Echo client on n0 to send UDP packets to n2 via r0 and r1
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uint32_t packetSizeN2 = 4000; // Packet should fragment as intermediate link MTU is 1500
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echoClient.SetAttribute("PacketSize", UintegerValue(packetSizeN2));
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echoClient.SetAttribute("MaxPackets", UintegerValue(maxPacketCount));
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ApplicationContainer clientAppsN2 = echoClient.Install(n1);
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clientAppsN2.Start(Seconds(11.0));
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clientAppsN2.Stop(Seconds(20.0));
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AsciiTraceHelper ascii;
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csma.EnableAsciiAll(ascii.CreateFileStream("fragmentation-ipv6-PMTU.tr"));
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csma.EnablePcapAll(std::string("fragmentation-ipv6-PMTU"), true);
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pointToPoint.EnablePcapAll(std::string("fragmentation-ipv6-PMTU"), true);
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NS_LOG_INFO("Run Simulation.");
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Simulator::Run();
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Simulator::Destroy();
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NS_LOG_INFO("Done.");
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return 0;
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}
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