275 lines
9.6 KiB
C++
275 lines
9.6 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2014 Universita' di Firenze, Italy
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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: 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 <fstream>
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#include "ns3/core-module.h"
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#include "ns3/internet-module.h"
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#include "ns3/point-to-point-module.h"
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#include "ns3/internet-apps-module.h"
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#include "ns3/ipv6-static-routing-helper.h"
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#include "ns3/ipv6-routing-table-entry.h"
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#include "ns3/mtp-module.h"
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE ("RipNgSimpleRouting");
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void TearDownLink (Ptr<Node> nodeA, Ptr<Node> nodeB, uint32_t interfaceA, uint32_t interfaceB)
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{
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nodeA->GetObject<Ipv6> ()->SetDown (interfaceA);
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nodeB->GetObject<Ipv6> ()->SetDown (interfaceB);
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}
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int main (int argc, char **argv)
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{
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LogComponentEnable ("LogicalProcess", LOG_LEVEL_INFO);
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LogComponentEnable ("MultithreadedSimulatorImpl", LOG_LEVEL_INFO);
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MtpInterface::Enable ();
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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", "Print routing tables at 30, 60 and 90 seconds", printRoutingTables);
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cmd.AddValue ("showPings", "Show Ping6 reception", showPings);
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cmd.AddValue ("splitHorizonStrategy", "Split Horizon strategy to use (NoSplitHorizon, SplitHorizon, PoisonReverse)", SplitHorizon);
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cmd.Parse (argc, argv);
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if (verbose)
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{
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LogComponentEnable ("RipNgSimpleRouting", LOG_LEVEL_INFO);
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LogComponentEnable ("RipNg", LOG_LEVEL_ALL);
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LogComponentEnable ("Icmpv6L4Protocol", LOG_LEVEL_INFO);
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LogComponentEnable ("Ipv6Interface", LOG_LEVEL_ALL);
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LogComponentEnable ("Icmpv6L4Protocol", LOG_LEVEL_ALL);
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LogComponentEnable ("NdiscCache", LOG_LEVEL_ALL);
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LogComponentEnable ("Ping6Application", LOG_LEVEL_ALL);
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}
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if (showPings)
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{
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LogComponentEnable ("Ping6Application", LOG_LEVEL_INFO);
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}
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if (SplitHorizon == "NoSplitHorizon")
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{
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Config::SetDefault ("ns3::RipNg::SplitHorizon", EnumValue (RipNg::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::RipNg::SplitHorizon", EnumValue (RipNg::SPLIT_HORIZON));
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}
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else
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{
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Config::SetDefault ("ns3::RipNg::SplitHorizon", EnumValue (RipNg::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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PointToPointHelper p2p;
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p2p.SetDeviceAttribute ("DataRate", DataRateValue (5000000));
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p2p.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
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NetDeviceContainer ndc1 = p2p.Install (net1);
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NetDeviceContainer ndc2 = p2p.Install (net2);
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NetDeviceContainer ndc3 = p2p.Install (net3);
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NetDeviceContainer ndc4 = p2p.Install (net4);
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NetDeviceContainer ndc5 = p2p.Install (net5);
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NetDeviceContainer ndc6 = p2p.Install (net6);
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NetDeviceContainer ndc7 = p2p.Install (net7);
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NS_LOG_INFO ("Create IPv6 and routing");
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RipNgHelper ripNgRouting;
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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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ripNgRouting.ExcludeInterface (a, 1);
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ripNgRouting.ExcludeInterface (d, 3);
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ripNgRouting.SetInterfaceMetric (c, 3, 10);
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ripNgRouting.SetInterfaceMetric (d, 1, 10);
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Ipv6ListRoutingHelper listRH;
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listRH.Add (ripNgRouting, 0);
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Ipv6StaticRoutingHelper staticRh;
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listRH.Add (staticRh, 5);
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InternetStackHelper internetv6;
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internetv6.SetIpv4StackInstall (false);
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internetv6.SetRoutingHelper (listRH);
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internetv6.Install (routers);
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InternetStackHelper internetv6Nodes;
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internetv6Nodes.SetIpv4StackInstall (false);
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internetv6Nodes.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 IPv6 Addresses.");
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Ipv6AddressHelper ipv6;
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ipv6.SetBase (Ipv6Address ("2001:1::"), Ipv6Prefix (64));
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Ipv6InterfaceContainer iic1 = ipv6.Assign (ndc1);
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iic1.SetForwarding (1, true);
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iic1.SetDefaultRouteInAllNodes (1);
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ipv6.SetBase (Ipv6Address ("2001:0:1::"), Ipv6Prefix (64));
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Ipv6InterfaceContainer iic2 = ipv6.Assign (ndc2);
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iic2.SetForwarding (0, true);
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iic2.SetForwarding (1, true);
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ipv6.SetBase (Ipv6Address ("2001:0:2::"), Ipv6Prefix (64));
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Ipv6InterfaceContainer iic3 = ipv6.Assign (ndc3);
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iic3.SetForwarding (0, true);
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iic3.SetForwarding (1, true);
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ipv6.SetBase (Ipv6Address ("2001:0:3::"), Ipv6Prefix (64));
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Ipv6InterfaceContainer iic4 = ipv6.Assign (ndc4);
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iic4.SetForwarding (0, true);
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iic4.SetForwarding (1, true);
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ipv6.SetBase (Ipv6Address ("2001:0:4::"), Ipv6Prefix (64));
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Ipv6InterfaceContainer iic5 = ipv6.Assign (ndc5);
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iic5.SetForwarding (0, true);
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iic5.SetForwarding (1, true);
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ipv6.SetBase (Ipv6Address ("2001:0:5::"), Ipv6Prefix (64));
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Ipv6InterfaceContainer iic6 = ipv6.Assign (ndc6);
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iic6.SetForwarding (0, true);
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iic6.SetForwarding (1, true);
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ipv6.SetBase (Ipv6Address ("2001:2::"), Ipv6Prefix (64));
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Ipv6InterfaceContainer iic7 = ipv6.Assign (ndc7);
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iic7.SetForwarding (0, true);
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iic7.SetDefaultRouteInAllNodes (0);
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if (printRoutingTables)
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{
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RipNgHelper routingHelper;
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Ptr<OutputStreamWrapper> routingStream = Create<OutputStreamWrapper> (&std::cout);
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routingHelper.PrintRoutingTableAt (Seconds (30.0), a, routingStream);
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routingHelper.PrintRoutingTableAt (Seconds (30.0), b, routingStream);
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routingHelper.PrintRoutingTableAt (Seconds (30.0), c, routingStream);
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routingHelper.PrintRoutingTableAt (Seconds (30.0), d, routingStream);
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routingHelper.PrintRoutingTableAt (Seconds (60.0), a, routingStream);
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routingHelper.PrintRoutingTableAt (Seconds (60.0), b, routingStream);
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routingHelper.PrintRoutingTableAt (Seconds (60.0), c, routingStream);
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routingHelper.PrintRoutingTableAt (Seconds (60.0), d, routingStream);
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routingHelper.PrintRoutingTableAt (Seconds (90.0), a, routingStream);
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routingHelper.PrintRoutingTableAt (Seconds (90.0), b, routingStream);
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routingHelper.PrintRoutingTableAt (Seconds (90.0), c, routingStream);
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routingHelper.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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uint32_t maxPacketCount = 100;
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Time interPacketInterval = Seconds (1.0);
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Ping6Helper ping6;
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ping6.SetLocal (iic1.GetAddress (0, 1));
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ping6.SetRemote (iic7.GetAddress (1, 1));
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ping6.SetAttribute ("MaxPackets", UintegerValue (maxPacketCount));
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ping6.SetAttribute ("Interval", TimeValue (interPacketInterval));
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ping6.SetAttribute ("PacketSize", UintegerValue (packetSize));
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ApplicationContainer apps = ping6.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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p2p.EnableAsciiAll (ascii.CreateFileStream ("ripng-simple-routing.tr"));
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p2p.EnablePcapAll ("ripng-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 (120));
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Simulator::Run ();
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Simulator::Destroy ();
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NS_LOG_INFO ("Done.");
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}
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