/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* 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
*
*/
// Network topology
//
// n0 n1 n2 n3
// | | | |
// =================
// LAN
//
// - Pcap traces are saved as tcp-nsc-zoo-$n-0.pcap, where $n represents the node number
// - TCP flows from n0 to n1, n2, n3, from n1 to n0, n2, n3, etc.
// Usage (e.g.): ./waf --run 'tcp-nsc-zoo --nodes=5'
#include <iostream>
#include <string>
#include "ns3/core-module.h"
#include "ns3/helper-module.h"
#include "ns3/node-module.h"
#include "ns3/global-route-manager.h"
#include "ns3/simulator-module.h"
using namespace ns3;
NS_LOG_COMPONENT_DEFINE ("TcpNscZoo");
// Simulates a diverse network with various stacks supported by NSC.
int main(int argc, char *argv[])
{
CsmaHelper csma;
unsigned int MaxNodes = 4;
unsigned int runtime = 3;
uint32_t seed[6] = {1, 1, 2, 3, 5, 8};
SeedManager::SetSeed(seed);
Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (2048));
Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("8kbps"));
CommandLine cmd;
// this allows the user to raise the number of nodes using --nodes=X command-line argument.
cmd.AddValue("nodes", "Number of nodes in the network (must be > 1)", MaxNodes);
cmd.AddValue("runtime", "How long the applications should send data (default 3 seconds)", runtime);
cmd.Parse (argc, argv);
if (MaxNodes < 2)
{
std::cerr << "--nodes: must be >= 2" << std::endl;
return 1;
}
csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate(100 * 1000 * 1000)));
csma.SetChannelAttribute ("Delay", TimeValue (MicroSeconds (200)));
NodeContainer n;
n.Create(MaxNodes);
NetDeviceContainer ethInterfaces = csma.Install (n);
InternetStackHelper internetStack;
internetStack.SetNscStack ("liblinux2.6.26.so");
// this switches nodes 0 and 1 to NSCs Linux 2.6.26 stack.
internetStack.Install (n.Get(0));
internetStack.Install (n.Get(1));
// this disables TCP SACK, wscale and timestamps on node 1 (the attributes represent sysctl-values).
Config::Set ("/NodeList/1/$ns3::Ns3NscStack<linux2.6.26>/net.ipv4.tcp_sack", StringValue ("0"));
Config::Set ("/NodeList/1/$ns3::Ns3NscStack<linux2.6.26>/net.ipv4.tcp_timestamps", StringValue ("0"));
Config::Set ("/NodeList/1/$ns3::Ns3NscStack<linux2.6.26>/net.ipv4.tcp_window_scaling", StringValue ("0"));
if (MaxNodes > 2)
{
internetStack.Install (n.Get(2));
}
if (MaxNodes > 3)
{
// the next statement doesn't change anything for the nodes 0, 1, and 2; since they
// already have a stack assigned.
internetStack.SetNscStack ("liblinux2.6.18.so");
// this switches node 3 to NSCs Linux 2.6.18 stack.
internetStack.Install (n.Get(3));
// and then agains disables sack/timestamps/wscale on node 3.
Config::Set ("/NodeList/3/$ns3::Ns3NscStack<linux2.6.18>/net.ipv4.tcp_sack", StringValue ("0"));
Config::Set ("/NodeList/3/$ns3::Ns3NscStack<linux2.6.18>/net.ipv4.tcp_timestamps", StringValue ("0"));
Config::Set ("/NodeList/3/$ns3::Ns3NscStack<linux2.6.18>/net.ipv4.tcp_window_scaling", StringValue ("0"));
}
// the freebsd stack is not yet built by default, so its commented out for now.
// internetStack.SetNscStack ("libfreebsd5.so");
for (unsigned int i =4; i < MaxNodes; i++)
{
internetStack.Install (n.Get(i));
}
Ipv4AddressHelper ipv4;
ipv4.SetBase ("10.0.0.0", "255.255.255.0");
Ipv4InterfaceContainer ipv4Interfaces = ipv4.Assign (ethInterfaces);
GlobalRouteManager::PopulateRoutingTables ();
uint16_t servPort = 8080;
PacketSinkHelper sinkHelper ("ns3::TcpSocketFactory", InetSocketAddress (Ipv4Address::GetAny (), servPort));
// start a sink client on all nodes
ApplicationContainer sinkApp = sinkHelper.Install (n);
sinkApp.Start (Seconds (0));
sinkApp.Stop (Seconds (30.0));
// This tells every node on the network to start a flow to all other nodes on the network ...
for (unsigned int i = 0 ; i < MaxNodes;i++)
{
for (unsigned int j = 0 ; j < MaxNodes;j++)
{
if (i == j)
{ // ...but we don't want a node to talk to itself.
continue;
}
Address remoteAddress(InetSocketAddress(ipv4Interfaces.GetAddress (j), servPort));
OnOffHelper clientHelper ("ns3::TcpSocketFactory", remoteAddress);
clientHelper.SetAttribute
("OnTime", RandomVariableValue (ConstantVariable (1)));
clientHelper.SetAttribute
("OffTime", RandomVariableValue (ConstantVariable (0)));
ApplicationContainer clientApp = clientHelper.Install(n.Get(i));
clientApp.Start (Seconds (j)); /* delay startup depending on node number */
clientApp.Stop (Seconds (j + runtime));
}
}
CsmaHelper::EnablePcapAll ("tcp-nsc-zoo");
Simulator::Stop (Seconds(100));
Simulator::Run ();
Simulator::Destroy ();
return 0;
}