226 lines
8.7 KiB
C++
226 lines
8.7 KiB
C++
/*
|
|
* 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
|
|
*
|
|
* Contributed by: Luis Cortes (cortes@gatech.edu)
|
|
*/
|
|
|
|
// This script exercises global routing code in a mixed point-to-point
|
|
// and csma/cd environment. We bring up and down interfaces and observe
|
|
// the effect on global routing. We explicitly enable the attribute
|
|
// to respond to interface events, so that routes are recomputed
|
|
// automatically.
|
|
//
|
|
// Network topology
|
|
//
|
|
// n0
|
|
// \ p-p
|
|
// \ (shared csma/cd)
|
|
// n2 -------------------------n3
|
|
// / | |
|
|
// / p-p n4 n5 ---------- n6
|
|
// n1 p-p
|
|
// | |
|
|
// ----------------------------------------
|
|
// p-p
|
|
//
|
|
// - at time 1 CBR/UDP flow from n1 to n6's IP address on the n5/n6 link
|
|
// - at time 10, start similar flow from n1 to n6's address on the n1/n6 link
|
|
//
|
|
// Order of events
|
|
// At pre-simulation time, configure global routes. Shortest path from
|
|
// n1 to n6 is via the direct point-to-point link
|
|
// At time 1s, start CBR traffic flow from n1 to n6
|
|
// At time 2s, set the n1 point-to-point interface to down. Packets
|
|
// will be diverted to the n1-n2-n5-n6 path
|
|
// At time 4s, re-enable the n1/n6 interface to up. n1-n6 route restored.
|
|
// At time 6s, set the n6-n1 point-to-point Ipv4 interface to down (note, this
|
|
// keeps the point-to-point link "up" from n1's perspective). Traffic will
|
|
// flow through the path n1-n2-n5-n6
|
|
// At time 8s, bring the interface back up. Path n1-n6 is restored
|
|
// At time 10s, stop the first flow.
|
|
// At time 11s, start a new flow, but to n6's other IP address (the one
|
|
// on the n1/n6 p2p link)
|
|
// At time 12s, bring the n1 interface down between n1 and n6. Packets
|
|
// will be diverted to the alternate path
|
|
// At time 14s, re-enable the n1/n6 interface to up. This will change
|
|
// routing back to n1-n6 since the interface up notification will cause
|
|
// a new local interface route, at higher priority than global routing
|
|
// At time 16s, stop the second flow.
|
|
|
|
// - Tracing of queues and packet receptions to file "dynamic-global-routing.tr"
|
|
|
|
#include "ns3/applications-module.h"
|
|
#include "ns3/core-module.h"
|
|
#include "ns3/csma-module.h"
|
|
#include "ns3/internet-module.h"
|
|
#include "ns3/ipv4-global-routing-helper.h"
|
|
#include "ns3/mtp-module.h"
|
|
#include "ns3/network-module.h"
|
|
#include "ns3/point-to-point-module.h"
|
|
|
|
#include <cassert>
|
|
#include <fstream>
|
|
#include <iostream>
|
|
#include <string>
|
|
|
|
using namespace ns3;
|
|
|
|
NS_LOG_COMPONENT_DEFINE("DynamicGlobalRoutingExample");
|
|
|
|
int
|
|
main(int argc, char* argv[])
|
|
{
|
|
MtpInterface::Enable();
|
|
// The below value configures the default behavior of global routing.
|
|
// By default, it is disabled. To respond to interface events, set to true
|
|
Config::SetDefault("ns3::Ipv4GlobalRouting::RespondToInterfaceEvents", BooleanValue(true));
|
|
|
|
// Allow the user to override any of the defaults and the above
|
|
// Bind ()s at run-time, via command-line arguments
|
|
CommandLine cmd(__FILE__);
|
|
cmd.Parse(argc, argv);
|
|
|
|
NS_LOG_INFO("Create nodes.");
|
|
NodeContainer c;
|
|
c.Create(7);
|
|
NodeContainer n0n2 = NodeContainer(c.Get(0), c.Get(2));
|
|
NodeContainer n1n2 = NodeContainer(c.Get(1), c.Get(2));
|
|
NodeContainer n5n6 = NodeContainer(c.Get(5), c.Get(6));
|
|
NodeContainer n1n6 = NodeContainer(c.Get(1), c.Get(6));
|
|
NodeContainer n2345 = NodeContainer(c.Get(2), c.Get(3), c.Get(4), c.Get(5));
|
|
|
|
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 d1d6 = p2p.Install(n1n6);
|
|
|
|
NetDeviceContainer d1d2 = p2p.Install(n1n2);
|
|
|
|
p2p.SetDeviceAttribute("DataRate", StringValue("1500kbps"));
|
|
p2p.SetChannelAttribute("Delay", StringValue("10ms"));
|
|
NetDeviceContainer d5d6 = p2p.Install(n5n6);
|
|
|
|
// We create the channels first without any IP addressing information
|
|
CsmaHelper csma;
|
|
csma.SetChannelAttribute("DataRate", StringValue("5Mbps"));
|
|
csma.SetChannelAttribute("Delay", StringValue("2ms"));
|
|
NetDeviceContainer d2345 = csma.Install(n2345);
|
|
|
|
// Later, we add IP addresses.
|
|
NS_LOG_INFO("Assign IP Addresses.");
|
|
Ipv4AddressHelper ipv4;
|
|
ipv4.SetBase("10.1.1.0", "255.255.255.0");
|
|
ipv4.Assign(d0d2);
|
|
|
|
ipv4.SetBase("10.1.2.0", "255.255.255.0");
|
|
ipv4.Assign(d1d2);
|
|
|
|
ipv4.SetBase("10.1.3.0", "255.255.255.0");
|
|
Ipv4InterfaceContainer i5i6 = ipv4.Assign(d5d6);
|
|
|
|
ipv4.SetBase("10.250.1.0", "255.255.255.0");
|
|
ipv4.Assign(d2345);
|
|
|
|
ipv4.SetBase("172.16.1.0", "255.255.255.0");
|
|
Ipv4InterfaceContainer i1i6 = ipv4.Assign(d1d6);
|
|
|
|
// Create router nodes, initialize routing database and set up the routing
|
|
// tables in the nodes.
|
|
Ipv4GlobalRoutingHelper::PopulateRoutingTables();
|
|
|
|
// 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", InetSocketAddress(i5i6.GetAddress(1), port));
|
|
onoff.SetConstantRate(DataRate("2kbps"));
|
|
onoff.SetAttribute("PacketSize", UintegerValue(50));
|
|
|
|
ApplicationContainer apps = onoff.Install(c.Get(1));
|
|
apps.Start(Seconds(1.0));
|
|
apps.Stop(Seconds(10.0));
|
|
|
|
// Create a second OnOff application to send UDP datagrams of size
|
|
// 210 bytes at a rate of 448 Kb/s
|
|
OnOffHelper onoff2("ns3::UdpSocketFactory", InetSocketAddress(i1i6.GetAddress(1), port));
|
|
onoff2.SetAttribute("OnTime", StringValue("ns3::ConstantRandomVariable[Constant=1]"));
|
|
onoff2.SetAttribute("OffTime", StringValue("ns3::ConstantRandomVariable[Constant=0]"));
|
|
onoff2.SetAttribute("DataRate", StringValue("2kbps"));
|
|
onoff2.SetAttribute("PacketSize", UintegerValue(50));
|
|
|
|
ApplicationContainer apps2 = onoff2.Install(c.Get(1));
|
|
apps2.Start(Seconds(11.0));
|
|
apps2.Stop(Seconds(16.0));
|
|
|
|
// Create an optional packet sink to receive these packets
|
|
PacketSinkHelper sink("ns3::UdpSocketFactory",
|
|
Address(InetSocketAddress(Ipv4Address::GetAny(), port)));
|
|
apps = sink.Install(c.Get(6));
|
|
apps.Start(Seconds(1.0));
|
|
apps.Stop(Seconds(10.0));
|
|
|
|
PacketSinkHelper sink2("ns3::UdpSocketFactory",
|
|
Address(InetSocketAddress(Ipv4Address::GetAny(), port)));
|
|
apps2 = sink2.Install(c.Get(6));
|
|
apps2.Start(Seconds(11.0));
|
|
apps2.Stop(Seconds(16.0));
|
|
|
|
AsciiTraceHelper ascii;
|
|
Ptr<OutputStreamWrapper> stream = ascii.CreateFileStream("dynamic-global-routing.tr");
|
|
p2p.EnableAsciiAll(stream);
|
|
csma.EnableAsciiAll(stream);
|
|
internet.EnableAsciiIpv4All(stream);
|
|
|
|
p2p.EnablePcapAll("dynamic-global-routing");
|
|
csma.EnablePcapAll("dynamic-global-routing", false);
|
|
|
|
Ptr<Node> n1 = c.Get(1);
|
|
Ptr<Ipv4> ipv41 = n1->GetObject<Ipv4>();
|
|
// The first ifIndex is 0 for loopback, then the first p2p is numbered 1,
|
|
// then the next p2p is numbered 2
|
|
uint32_t ipv4ifIndex1 = 2;
|
|
|
|
Simulator::Schedule(Seconds(2), &Ipv4::SetDown, ipv41, ipv4ifIndex1);
|
|
Simulator::Schedule(Seconds(4), &Ipv4::SetUp, ipv41, ipv4ifIndex1);
|
|
|
|
Ptr<Node> n6 = c.Get(6);
|
|
Ptr<Ipv4> ipv46 = n6->GetObject<Ipv4>();
|
|
// The first ifIndex is 0 for loopback, then the first p2p is numbered 1,
|
|
// then the next p2p is numbered 2
|
|
uint32_t ipv4ifIndex6 = 2;
|
|
Simulator::Schedule(Seconds(6), &Ipv4::SetDown, ipv46, ipv4ifIndex6);
|
|
Simulator::Schedule(Seconds(8), &Ipv4::SetUp, ipv46, ipv4ifIndex6);
|
|
|
|
Simulator::Schedule(Seconds(12), &Ipv4::SetDown, ipv41, ipv4ifIndex1);
|
|
Simulator::Schedule(Seconds(14), &Ipv4::SetUp, ipv41, ipv4ifIndex1);
|
|
|
|
// Trace routing tables
|
|
Ptr<OutputStreamWrapper> routingStream =
|
|
Create<OutputStreamWrapper>("dynamic-global-routing.routes", std::ios::out);
|
|
Ipv4RoutingHelper::PrintRoutingTableAllAt(Seconds(12), routingStream);
|
|
|
|
NS_LOG_INFO("Run Simulation.");
|
|
Simulator::Run();
|
|
Simulator::Destroy();
|
|
NS_LOG_INFO("Done.");
|
|
|
|
return 0;
|
|
}
|