253 lines
8.9 KiB
C++
253 lines
8.9 KiB
C++
/*
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* Copyright (c) 2016 Universita' di Firenze, Italy
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*
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* SPDX-License-Identifier: GPL-2.0-only
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*
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* Author: Tommaso Pecorella <tommaso.pecorella@unifi.it>
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*/
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// Network topology
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//
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// SRC
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// |<=== source network
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// A-----B
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// \ / \ all networks have cost 1, except
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// \ / | for the direct link from C to D, which
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// C / has cost 10
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// | /
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// |/
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// D
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// |<=== target network
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// DST
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//
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//
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// A, B, C and D are RIPng routers.
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// A and D are configured with static addresses.
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// SRC and DST will exchange packets.
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//
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// After about 3 seconds, the topology is built, and Echo Reply will be received.
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// After 40 seconds, the link between B and D will break, causing a route failure.
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// After 44 seconds from the failure, the routers will recovery from the failure.
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// Split Horizoning should affect the recovery time, but it is not. See the manual
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// for an explanation of this effect.
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//
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// If "showPings" is enabled, the user will see:
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// 1) if the ping has been acknowledged
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// 2) if a Destination Unreachable has been received by the sender
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// 3) nothing, when the Echo Request has been received by the destination but
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// the Echo Reply is unable to reach the sender.
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// Examining the .pcap files with Wireshark can confirm this effect.
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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-apps-module.h"
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#include "ns3/internet-module.h"
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#include "ns3/ipv4-routing-table-entry.h"
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#include "ns3/ipv4-static-routing-helper.h"
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#include <fstream>
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE("RipSimpleRouting");
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void
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TearDownLink(Ptr<Node> nodeA, Ptr<Node> nodeB, uint32_t interfaceA, uint32_t interfaceB)
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{
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nodeA->GetObject<Ipv4>()->SetDown(interfaceA);
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nodeB->GetObject<Ipv4>()->SetDown(interfaceB);
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}
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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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bool printRoutingTables = false;
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bool showPings = false;
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std::string SplitHorizon("PoisonReverse");
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CommandLine cmd(__FILE__);
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cmd.AddValue("verbose", "turn on log components", verbose);
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cmd.AddValue("printRoutingTables",
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"Print routing tables at 30, 60 and 90 seconds",
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printRoutingTables);
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cmd.AddValue("showPings", "Show Ping reception", showPings);
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cmd.AddValue("splitHorizonStrategy",
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"Split Horizon strategy to use (NoSplitHorizon, SplitHorizon, PoisonReverse)",
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SplitHorizon);
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cmd.Parse(argc, argv);
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if (verbose)
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{
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LogComponentEnableAll(LogLevel(LOG_PREFIX_TIME | LOG_PREFIX_NODE));
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LogComponentEnable("RipSimpleRouting", LOG_LEVEL_INFO);
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LogComponentEnable("Rip", LOG_LEVEL_ALL);
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LogComponentEnable("Ipv4Interface", LOG_LEVEL_ALL);
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LogComponentEnable("Icmpv4L4Protocol", LOG_LEVEL_ALL);
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LogComponentEnable("Ipv4L3Protocol", LOG_LEVEL_ALL);
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LogComponentEnable("ArpCache", LOG_LEVEL_ALL);
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LogComponentEnable("Ping", LOG_LEVEL_ALL);
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}
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if (SplitHorizon == "NoSplitHorizon")
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{
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Config::SetDefault("ns3::Rip::SplitHorizon", EnumValue(Rip::NO_SPLIT_HORIZON));
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}
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else if (SplitHorizon == "SplitHorizon")
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{
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Config::SetDefault("ns3::Rip::SplitHorizon", EnumValue(Rip::SPLIT_HORIZON));
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}
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else
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{
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Config::SetDefault("ns3::Rip::SplitHorizon", EnumValue(Rip::POISON_REVERSE));
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}
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NS_LOG_INFO("Create nodes.");
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Ptr<Node> src = CreateObject<Node>();
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Names::Add("SrcNode", src);
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Ptr<Node> dst = CreateObject<Node>();
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Names::Add("DstNode", dst);
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Ptr<Node> a = CreateObject<Node>();
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Names::Add("RouterA", a);
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Ptr<Node> b = CreateObject<Node>();
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Names::Add("RouterB", b);
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Ptr<Node> c = CreateObject<Node>();
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Names::Add("RouterC", c);
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Ptr<Node> d = CreateObject<Node>();
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Names::Add("RouterD", d);
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NodeContainer net1(src, a);
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NodeContainer net2(a, b);
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NodeContainer net3(a, c);
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NodeContainer net4(b, c);
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NodeContainer net5(c, d);
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NodeContainer net6(b, d);
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NodeContainer net7(d, dst);
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NodeContainer routers(a, b, c, d);
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NodeContainer nodes(src, dst);
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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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NetDeviceContainer ndc1 = csma.Install(net1);
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NetDeviceContainer ndc2 = csma.Install(net2);
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NetDeviceContainer ndc3 = csma.Install(net3);
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NetDeviceContainer ndc4 = csma.Install(net4);
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NetDeviceContainer ndc5 = csma.Install(net5);
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NetDeviceContainer ndc6 = csma.Install(net6);
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NetDeviceContainer ndc7 = csma.Install(net7);
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NS_LOG_INFO("Create IPv4 and routing");
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RipHelper ripRouting;
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// Rule of thumb:
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// Interfaces are added sequentially, starting from 0
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// However, interface 0 is always the loopback...
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ripRouting.ExcludeInterface(a, 1);
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ripRouting.ExcludeInterface(d, 3);
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ripRouting.SetInterfaceMetric(c, 3, 10);
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ripRouting.SetInterfaceMetric(d, 1, 10);
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Ipv4ListRoutingHelper listRH;
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listRH.Add(ripRouting, 0);
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// Ipv4StaticRoutingHelper staticRh;
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// listRH.Add (staticRh, 5);
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InternetStackHelper internet;
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internet.SetIpv6StackInstall(false);
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internet.SetRoutingHelper(listRH);
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internet.Install(routers);
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InternetStackHelper internetNodes;
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internetNodes.SetIpv6StackInstall(false);
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internetNodes.Install(nodes);
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// Assign addresses.
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// The source and destination networks have global addresses
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// The "core" network just needs link-local addresses for routing.
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// We assign global addresses to the routers as well to receive
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// ICMPv6 errors.
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NS_LOG_INFO("Assign IPv4 Addresses.");
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Ipv4AddressHelper ipv4;
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ipv4.SetBase(Ipv4Address("10.0.0.0"), Ipv4Mask("255.255.255.0"));
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Ipv4InterfaceContainer iic1 = ipv4.Assign(ndc1);
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ipv4.SetBase(Ipv4Address("10.0.1.0"), Ipv4Mask("255.255.255.0"));
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Ipv4InterfaceContainer iic2 = ipv4.Assign(ndc2);
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ipv4.SetBase(Ipv4Address("10.0.2.0"), Ipv4Mask("255.255.255.0"));
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Ipv4InterfaceContainer iic3 = ipv4.Assign(ndc3);
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ipv4.SetBase(Ipv4Address("10.0.3.0"), Ipv4Mask("255.255.255.0"));
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Ipv4InterfaceContainer iic4 = ipv4.Assign(ndc4);
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ipv4.SetBase(Ipv4Address("10.0.4.0"), Ipv4Mask("255.255.255.0"));
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Ipv4InterfaceContainer iic5 = ipv4.Assign(ndc5);
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ipv4.SetBase(Ipv4Address("10.0.5.0"), Ipv4Mask("255.255.255.0"));
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Ipv4InterfaceContainer iic6 = ipv4.Assign(ndc6);
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ipv4.SetBase(Ipv4Address("10.0.6.0"), Ipv4Mask("255.255.255.0"));
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Ipv4InterfaceContainer iic7 = ipv4.Assign(ndc7);
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Ptr<Ipv4StaticRouting> staticRouting;
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staticRouting = Ipv4RoutingHelper::GetRouting<Ipv4StaticRouting>(
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src->GetObject<Ipv4>()->GetRoutingProtocol());
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staticRouting->SetDefaultRoute("10.0.0.2", 1);
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staticRouting = Ipv4RoutingHelper::GetRouting<Ipv4StaticRouting>(
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dst->GetObject<Ipv4>()->GetRoutingProtocol());
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staticRouting->SetDefaultRoute("10.0.6.1", 1);
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if (printRoutingTables)
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{
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Ptr<OutputStreamWrapper> routingStream = Create<OutputStreamWrapper>(&std::cout);
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Ipv4RoutingHelper::PrintRoutingTableAt(Seconds(30.0), a, routingStream);
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Ipv4RoutingHelper::PrintRoutingTableAt(Seconds(30.0), b, routingStream);
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Ipv4RoutingHelper::PrintRoutingTableAt(Seconds(30.0), c, routingStream);
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Ipv4RoutingHelper::PrintRoutingTableAt(Seconds(30.0), d, routingStream);
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Ipv4RoutingHelper::PrintRoutingTableAt(Seconds(60.0), a, routingStream);
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Ipv4RoutingHelper::PrintRoutingTableAt(Seconds(60.0), b, routingStream);
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Ipv4RoutingHelper::PrintRoutingTableAt(Seconds(60.0), c, routingStream);
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Ipv4RoutingHelper::PrintRoutingTableAt(Seconds(60.0), d, routingStream);
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Ipv4RoutingHelper::PrintRoutingTableAt(Seconds(90.0), a, routingStream);
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Ipv4RoutingHelper::PrintRoutingTableAt(Seconds(90.0), b, routingStream);
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Ipv4RoutingHelper::PrintRoutingTableAt(Seconds(90.0), c, routingStream);
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Ipv4RoutingHelper::PrintRoutingTableAt(Seconds(90.0), d, routingStream);
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}
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NS_LOG_INFO("Create Applications.");
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uint32_t packetSize = 1024;
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Time interPacketInterval = Seconds(1.0);
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PingHelper ping(Ipv4Address("10.0.6.2"));
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ping.SetAttribute("Interval", TimeValue(interPacketInterval));
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ping.SetAttribute("Size", UintegerValue(packetSize));
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if (showPings)
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{
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ping.SetAttribute("VerboseMode", EnumValue(Ping::VerboseMode::VERBOSE));
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}
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ApplicationContainer apps = ping.Install(src);
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apps.Start(Seconds(1.0));
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apps.Stop(Seconds(110.0));
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AsciiTraceHelper ascii;
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csma.EnableAsciiAll(ascii.CreateFileStream("rip-simple-routing.tr"));
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csma.EnablePcapAll("rip-simple-routing", true);
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Simulator::Schedule(Seconds(40), &TearDownLink, b, d, 3, 2);
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/* Now, do the actual simulation. */
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NS_LOG_INFO("Run Simulation.");
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Simulator::Stop(Seconds(131.0));
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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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