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unison/examples/routing/rip-simple-network.cc
Eduardo Almeida 5b9bb7ad26 example: Add missing return 0 in multiple examples
2022-09-26 10:16:54 +00:00

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2016 Universita' di Firenze, Italy
*
* 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
*
* Author: Tommaso Pecorella <tommaso.pecorella@unifi.it>
*/
// Network topology
//
// SRC
// |<=== source network
// A-----B
// \ / \ all networks have cost 1, except
// \ / | for the direct link from C to D, which
// C / has cost 10
// | /
// |/
// D
// |<=== target network
// DST
//
//
// A, B, C and D are RIPng routers.
// A and D are configured with static addresses.
// SRC and DST will exchange packets.
//
// After about 3 seconds, the topology is built, and Echo Reply will be received.
// After 40 seconds, the link between B and D will break, causing a route failure.
// After 44 seconds from the failure, the routers will recovery from the failure.
// Split Horizoning should affect the recovery time, but it is not. See the manual
// for an explanation of this effect.
//
// If "showPings" is enabled, the user will see:
// 1) if the ping has been acknowledged
// 2) if a Destination Unreachable has been received by the sender
// 3) nothing, when the Echo Request has been received by the destination but
// the Echo Reply is unable to reach the sender.
// Examining the .pcap files with Wireshark can confirm this effect.
#include <fstream>
#include "ns3/core-module.h"
#include "ns3/internet-module.h"
#include "ns3/csma-module.h"
#include "ns3/internet-apps-module.h"
#include "ns3/ipv4-static-routing-helper.h"
#include "ns3/ipv4-routing-table-entry.h"
using namespace ns3;
NS_LOG_COMPONENT_DEFINE ("RipSimpleRouting");
void TearDownLink (Ptr<Node> nodeA, Ptr<Node> nodeB, uint32_t interfaceA, uint32_t interfaceB)
{
nodeA->GetObject<Ipv4> ()->SetDown (interfaceA);
nodeB->GetObject<Ipv4> ()->SetDown (interfaceB);
}
int main (int argc, char **argv)
{
bool verbose = false;
bool printRoutingTables = false;
bool showPings = false;
std::string SplitHorizon ("PoisonReverse");
CommandLine cmd (__FILE__);
cmd.AddValue ("verbose", "turn on log components", verbose);
cmd.AddValue ("printRoutingTables", "Print routing tables at 30, 60 and 90 seconds", printRoutingTables);
cmd.AddValue ("showPings", "Show Ping6 reception", showPings);
cmd.AddValue ("splitHorizonStrategy", "Split Horizon strategy to use (NoSplitHorizon, SplitHorizon, PoisonReverse)", SplitHorizon);
cmd.Parse (argc, argv);
if (verbose)
{
LogComponentEnableAll (LogLevel (LOG_PREFIX_TIME | LOG_PREFIX_NODE));
LogComponentEnable ("RipSimpleRouting", LOG_LEVEL_INFO);
LogComponentEnable ("Rip", LOG_LEVEL_ALL);
LogComponentEnable ("Ipv4Interface", LOG_LEVEL_ALL);
LogComponentEnable ("Icmpv4L4Protocol", LOG_LEVEL_ALL);
LogComponentEnable ("Ipv4L3Protocol", LOG_LEVEL_ALL);
LogComponentEnable ("ArpCache", LOG_LEVEL_ALL);
LogComponentEnable ("V4Ping", LOG_LEVEL_ALL);
}
if (SplitHorizon == "NoSplitHorizon")
{
Config::SetDefault ("ns3::Rip::SplitHorizon", EnumValue (RipNg::NO_SPLIT_HORIZON));
}
else if (SplitHorizon == "SplitHorizon")
{
Config::SetDefault ("ns3::Rip::SplitHorizon", EnumValue (RipNg::SPLIT_HORIZON));
}
else
{
Config::SetDefault ("ns3::Rip::SplitHorizon", EnumValue (RipNg::POISON_REVERSE));
}
NS_LOG_INFO ("Create nodes.");
Ptr<Node> src = CreateObject<Node> ();
Names::Add ("SrcNode", src);
Ptr<Node> dst = CreateObject<Node> ();
Names::Add ("DstNode", dst);
Ptr<Node> a = CreateObject<Node> ();
Names::Add ("RouterA", a);
Ptr<Node> b = CreateObject<Node> ();
Names::Add ("RouterB", b);
Ptr<Node> c = CreateObject<Node> ();
Names::Add ("RouterC", c);
Ptr<Node> d = CreateObject<Node> ();
Names::Add ("RouterD", d);
NodeContainer net1 (src, a);
NodeContainer net2 (a, b);
NodeContainer net3 (a, c);
NodeContainer net4 (b, c);
NodeContainer net5 (c, d);
NodeContainer net6 (b, d);
NodeContainer net7 (d, dst);
NodeContainer routers (a, b, c, d);
NodeContainer nodes (src, dst);
NS_LOG_INFO ("Create channels.");
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (5000000));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
NetDeviceContainer ndc1 = csma.Install (net1);
NetDeviceContainer ndc2 = csma.Install (net2);
NetDeviceContainer ndc3 = csma.Install (net3);
NetDeviceContainer ndc4 = csma.Install (net4);
NetDeviceContainer ndc5 = csma.Install (net5);
NetDeviceContainer ndc6 = csma.Install (net6);
NetDeviceContainer ndc7 = csma.Install (net7);
NS_LOG_INFO ("Create IPv4 and routing");
RipHelper ripRouting;
// Rule of thumb:
// Interfaces are added sequentially, starting from 0
// However, interface 0 is always the loopback...
ripRouting.ExcludeInterface (a, 1);
ripRouting.ExcludeInterface (d, 3);
ripRouting.SetInterfaceMetric (c, 3, 10);
ripRouting.SetInterfaceMetric (d, 1, 10);
Ipv4ListRoutingHelper listRH;
listRH.Add (ripRouting, 0);
// Ipv4StaticRoutingHelper staticRh;
// listRH.Add (staticRh, 5);
InternetStackHelper internet;
internet.SetIpv6StackInstall (false);
internet.SetRoutingHelper (listRH);
internet.Install (routers);
InternetStackHelper internetNodes;
internetNodes.SetIpv6StackInstall (false);
internetNodes.Install (nodes);
// Assign addresses.
// The source and destination networks have global addresses
// The "core" network just needs link-local addresses for routing.
// We assign global addresses to the routers as well to receive
// ICMPv6 errors.
NS_LOG_INFO ("Assign IPv4 Addresses.");
Ipv4AddressHelper ipv4;
ipv4.SetBase (Ipv4Address ("10.0.0.0"), Ipv4Mask ("255.255.255.0"));
Ipv4InterfaceContainer iic1 = ipv4.Assign (ndc1);
ipv4.SetBase (Ipv4Address ("10.0.1.0"), Ipv4Mask ("255.255.255.0"));
Ipv4InterfaceContainer iic2 = ipv4.Assign (ndc2);
ipv4.SetBase (Ipv4Address ("10.0.2.0"), Ipv4Mask ("255.255.255.0"));
Ipv4InterfaceContainer iic3 = ipv4.Assign (ndc3);
ipv4.SetBase (Ipv4Address ("10.0.3.0"), Ipv4Mask ("255.255.255.0"));
Ipv4InterfaceContainer iic4 = ipv4.Assign (ndc4);
ipv4.SetBase (Ipv4Address ("10.0.4.0"), Ipv4Mask ("255.255.255.0"));
Ipv4InterfaceContainer iic5 = ipv4.Assign (ndc5);
ipv4.SetBase (Ipv4Address ("10.0.5.0"), Ipv4Mask ("255.255.255.0"));
Ipv4InterfaceContainer iic6 = ipv4.Assign (ndc6);
ipv4.SetBase (Ipv4Address ("10.0.6.0"), Ipv4Mask ("255.255.255.0"));
Ipv4InterfaceContainer iic7 = ipv4.Assign (ndc7);
Ptr<Ipv4StaticRouting> staticRouting;
staticRouting = Ipv4RoutingHelper::GetRouting <Ipv4StaticRouting> (src->GetObject<Ipv4> ()->GetRoutingProtocol ());
staticRouting->SetDefaultRoute ("10.0.0.2", 1 );
staticRouting = Ipv4RoutingHelper::GetRouting <Ipv4StaticRouting> (dst->GetObject<Ipv4> ()->GetRoutingProtocol ());
staticRouting->SetDefaultRoute ("10.0.6.1", 1 );
if (printRoutingTables)
{
RipHelper routingHelper;
Ptr<OutputStreamWrapper> routingStream = Create<OutputStreamWrapper> (&std::cout);
routingHelper.PrintRoutingTableAt (Seconds (30.0), a, routingStream);
routingHelper.PrintRoutingTableAt (Seconds (30.0), b, routingStream);
routingHelper.PrintRoutingTableAt (Seconds (30.0), c, routingStream);
routingHelper.PrintRoutingTableAt (Seconds (30.0), d, routingStream);
routingHelper.PrintRoutingTableAt (Seconds (60.0), a, routingStream);
routingHelper.PrintRoutingTableAt (Seconds (60.0), b, routingStream);
routingHelper.PrintRoutingTableAt (Seconds (60.0), c, routingStream);
routingHelper.PrintRoutingTableAt (Seconds (60.0), d, routingStream);
routingHelper.PrintRoutingTableAt (Seconds (90.0), a, routingStream);
routingHelper.PrintRoutingTableAt (Seconds (90.0), b, routingStream);
routingHelper.PrintRoutingTableAt (Seconds (90.0), c, routingStream);
routingHelper.PrintRoutingTableAt (Seconds (90.0), d, routingStream);
}
NS_LOG_INFO ("Create Applications.");
uint32_t packetSize = 1024;
Time interPacketInterval = Seconds (1.0);
V4PingHelper ping ("10.0.6.2");
ping.SetAttribute ("Interval", TimeValue (interPacketInterval));
ping.SetAttribute ("Size", UintegerValue (packetSize));
if (showPings)
{
ping.SetAttribute ("Verbose", BooleanValue (true));
}
ApplicationContainer apps = ping.Install (src);
apps.Start (Seconds (1.0));
apps.Stop (Seconds (110.0));
AsciiTraceHelper ascii;
csma.EnableAsciiAll (ascii.CreateFileStream ("rip-simple-routing.tr"));
csma.EnablePcapAll ("rip-simple-routing", true);
Simulator::Schedule (Seconds (40), &TearDownLink, b, d, 3, 2);
/* Now, do the actual simulation. */
NS_LOG_INFO ("Run Simulation.");
Simulator::Stop (Seconds (131.0));
Simulator::Run ();
Simulator::Destroy ();
NS_LOG_INFO ("Done.");
return 0;
}
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