145 lines
5.5 KiB
C++
145 lines
5.5 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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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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*/
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// Network topology
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//
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// n0 n1 n2 n3
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// | | | |
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// =================
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// LAN
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//
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// - Pcap traces are saved as tcp-nsc-zoo-$n-0.pcap, where $n represents the node number
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// - TCP flows from n0 to n1, n2, n3, from n1 to n0, n2, n3, etc.
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// Usage (e.g.): ./waf --run 'tcp-nsc-zoo --nodes=5'
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#include <iostream>
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#include <string>
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#include "ns3/core-module.h"
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#include "ns3/helper-module.h"
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#include "ns3/node-module.h"
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#include "ns3/simulator-module.h"
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE ("TcpNscZoo");
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// Simulates a diverse network with various stacks supported by NSC.
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int main(int argc, char *argv[])
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{
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CsmaHelper csma;
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unsigned int MaxNodes = 4;
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unsigned int runtime = 3;
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Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (2048));
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Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("8kbps"));
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CommandLine cmd;
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// this allows the user to raise the number of nodes using --nodes=X command-line argument.
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cmd.AddValue("nodes", "Number of nodes in the network (must be > 1)", MaxNodes);
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cmd.AddValue("runtime", "How long the applications should send data (default 3 seconds)", runtime);
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cmd.Parse (argc, argv);
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if (MaxNodes < 2)
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{
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std::cerr << "--nodes: must be >= 2" << std::endl;
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return 1;
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}
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csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate(100 * 1000 * 1000)));
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csma.SetChannelAttribute ("Delay", TimeValue (MicroSeconds (200)));
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NodeContainer n;
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n.Create(MaxNodes);
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NetDeviceContainer ethInterfaces = csma.Install (n);
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InternetStackHelper internetStack;
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internetStack.SetTcp ("ns3::NscTcpL4Protocol","Library",StringValue("liblinux2.6.26.so"));
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// this switches nodes 0 and 1 to NSCs Linux 2.6.26 stack.
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internetStack.Install (n.Get(0));
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internetStack.Install (n.Get(1));
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// this disables TCP SACK, wscale and timestamps on node 1 (the attributes represent sysctl-values).
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Config::Set ("/NodeList/1/$ns3::Ns3NscStack<linux2.6.26>/net.ipv4.tcp_sack", StringValue ("0"));
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Config::Set ("/NodeList/1/$ns3::Ns3NscStack<linux2.6.26>/net.ipv4.tcp_timestamps", StringValue ("0"));
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Config::Set ("/NodeList/1/$ns3::Ns3NscStack<linux2.6.26>/net.ipv4.tcp_window_scaling", StringValue ("0"));
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if (MaxNodes > 2)
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{
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internetStack.Install (n.Get(2));
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}
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if (MaxNodes > 3)
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{
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// the next statement doesn't change anything for the nodes 0, 1, and 2; since they
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// already have a stack assigned.
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internetStack.SetTcp ("ns3::NscTcpL4Protocol","Library",StringValue("liblinux2.6.18.so"));
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// this switches node 3 to NSCs Linux 2.6.18 stack.
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internetStack.Install (n.Get(3));
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// and then agains disables sack/timestamps/wscale on node 3.
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Config::Set ("/NodeList/3/$ns3::Ns3NscStack<linux2.6.18>/net.ipv4.tcp_sack", StringValue ("0"));
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Config::Set ("/NodeList/3/$ns3::Ns3NscStack<linux2.6.18>/net.ipv4.tcp_timestamps", StringValue ("0"));
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Config::Set ("/NodeList/3/$ns3::Ns3NscStack<linux2.6.18>/net.ipv4.tcp_window_scaling", StringValue ("0"));
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}
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// the freebsd stack is not yet built by default, so its commented out for now.
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// internetStack.SetNscStack ("libfreebsd5.so");
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for (unsigned int i =4; i < MaxNodes; i++)
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{
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internetStack.Install (n.Get(i));
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}
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Ipv4AddressHelper ipv4;
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ipv4.SetBase ("10.0.0.0", "255.255.255.0");
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Ipv4InterfaceContainer ipv4Interfaces = ipv4.Assign (ethInterfaces);
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Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
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uint16_t servPort = 8080;
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PacketSinkHelper sinkHelper ("ns3::TcpSocketFactory", InetSocketAddress (Ipv4Address::GetAny (), servPort));
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// start a sink client on all nodes
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ApplicationContainer sinkApp = sinkHelper.Install (n);
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sinkApp.Start (Seconds (0));
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sinkApp.Stop (Seconds (30.0));
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// This tells every node on the network to start a flow to all other nodes on the network ...
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for (unsigned int i = 0 ; i < MaxNodes;i++)
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{
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for (unsigned int j = 0 ; j < MaxNodes;j++)
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{
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if (i == j)
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{ // ...but we don't want a node to talk to itself.
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continue;
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}
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Address remoteAddress(InetSocketAddress(ipv4Interfaces.GetAddress (j), servPort));
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OnOffHelper clientHelper ("ns3::TcpSocketFactory", remoteAddress);
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clientHelper.SetAttribute
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("OnTime", RandomVariableValue (ConstantVariable (1)));
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clientHelper.SetAttribute
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("OffTime", RandomVariableValue (ConstantVariable (0)));
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ApplicationContainer clientApp = clientHelper.Install(n.Get(i));
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clientApp.Start (Seconds (j)); /* delay startup depending on node number */
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clientApp.Stop (Seconds (j + runtime));
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}
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}
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CsmaHelper::EnablePcapAll ("tcp-nsc-zoo", false);
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Simulator::Stop (Seconds(100));
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Simulator::Run ();
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Simulator::Destroy ();
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return 0;
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}
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