212 lines
7.4 KiB
C++
212 lines
7.4 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2012 NICT
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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: Hajime Tazaki <tazaki@nict.go.jp>
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*
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* This code is a modified version of the code used for the the experiments in the paper
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* "DCE Cradle: Simulate Network Protocols with Real Stacks for Better Realism"
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* by Hajime Tazaki, Frederic Urbani and Thierry Turlett presented at WNS3 2013
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*
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* By default, TCP timestamps, window scale, and SACK are disabled because
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* they were not supported in ns-3 at the time of this paper. TCP timestamp
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* and window scale can be enabled by command line arguments.
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*
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*/
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#include "ns3/log.h"
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#include "ns3/core-module.h"
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#include "ns3/network-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/applications-module.h"
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#include "ns3/flow-monitor-module.h"
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE ("TcpNscComparison");
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std::string m_stack = "nsc-linux";
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std::string sock_factory;
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uint32_t m_seed = 1;
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double startTime = 4.0;
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double stopTime = 20.0;
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uint32_t m_nNodes = 2;
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bool enablePcap = false;
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bool enableTimestamps = false;
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bool enableWindowScale = false;
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int
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main (int argc, char *argv[])
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{
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//ensure the ns3 TCP default values match what nsc is using
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Config::SetDefault ("ns3::TcpSocket::SegmentSize", UintegerValue (1448));
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Config::SetDefault ("ns3::TcpSocket::DelAckCount", UintegerValue (1));
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CommandLine cmd;
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cmd.AddValue ("stack", "choose network stack", m_stack);
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cmd.AddValue ("seed", "randomize seed", m_seed);
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cmd.AddValue ("nNodes", "the number of source and sink nodes", m_nNodes);
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cmd.AddValue ("stopTime", "duration", stopTime);
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cmd.AddValue ("enablePcap", "pcap", enablePcap);
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cmd.AddValue ("enableTimestamps", "use TCP Timestamps option", enableTimestamps);
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cmd.AddValue ("enableWindowScale", "use TCP Window Scale option", enableWindowScale);
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cmd.Parse (argc, argv);
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SeedManager::SetSeed (m_seed);
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if (m_stack != "nsc-linux" && m_stack != "ns3")
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{
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NS_FATAL_ERROR ("Error, stack named " << m_stack << " is not supported");
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}
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NodeContainer lefts, routers, rights, nodes;
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lefts.Create (m_nNodes);
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routers.Create (2);
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rights.Create (m_nNodes);
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nodes = NodeContainer (lefts, routers, rights);
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InternetStackHelper internetStack;
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GlobalValue::Bind ("ChecksumEnabled", BooleanValue (true));
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if (m_stack == "ns3")
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{
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sock_factory = "ns3::TcpSocketFactory";
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if (enableTimestamps == false)
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{
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Config::SetDefault ("ns3::TcpSocketBase::WindowScaling", BooleanValue (false));
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}
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if (enableWindowScale == false)
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{
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Config::SetDefault ("ns3::TcpSocketBase::Timestamp", BooleanValue (false));
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}
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internetStack.Install (nodes);
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}
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else if (m_stack == "nsc-linux")
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{
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internetStack.Install (routers);
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sock_factory = "ns3::TcpSocketFactory";
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internetStack.SetTcp ("ns3::NscTcpL4Protocol",
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"Library", StringValue ("liblinux2.6.26.so"));
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internetStack.Install (lefts);
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internetStack.Install (rights);
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// at the time this program was written, these were not implemented
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// in ns3 tcp, so disable for comparison
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Config::Set ("/NodeList/*/$ns3::Ns3NscStack<linux2.6.26>/net.ipv4.tcp_sack", StringValue ("0"));
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if (enableTimestamps == false)
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{
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Config::Set ("/NodeList/*/$ns3::Ns3NscStack<linux2.6.26>/net.ipv4.tcp_timestamps", StringValue ("0"));
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}
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if (enableWindowScale == false)
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{
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Config::Set ("/NodeList/*/$ns3::Ns3NscStack<linux2.6.26>/net.ipv4.tcp_window_scaling", StringValue ("0"));
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}
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}
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PointToPointHelper pointToPoint;
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pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
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pointToPoint.SetChannelAttribute ("Delay", StringValue ("1ns"));
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Ipv4AddressHelper address;
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Ipv4InterfaceContainer interfaces;
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NetDeviceContainer dev0, dev1, dev2;
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for (uint32_t i = 0; i < m_nNodes; i++)
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{
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std::ostringstream oss;
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oss << "10.0." << i << ".0";
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address.SetBase (oss.str ().c_str (), "255.255.255.0");
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dev0 = pointToPoint.Install (NodeContainer (lefts.Get (i), routers.Get (0)));
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address.Assign (dev0);
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}
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// bottle neck link
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pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("2Mbps"));
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pointToPoint.SetChannelAttribute ("Delay", StringValue ("100ms"));
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dev1 = pointToPoint.Install (NodeContainer (routers.Get (0), routers.Get (1)));
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pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
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pointToPoint.SetChannelAttribute ("Delay", StringValue ("1ns"));
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// for right links
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for (uint32_t i = 0; i < m_nNodes; i++)
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{
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std::ostringstream oss;
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oss << "10.2." << i << ".0";
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address.SetBase (oss.str ().c_str (), "255.255.255.0");
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dev2 = pointToPoint.Install (NodeContainer (routers.Get (1), rights.Get (i)));
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address.Assign (dev2);
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}
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// bottle neck link
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Ptr<RateErrorModel> em1 =
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CreateObjectWithAttributes<RateErrorModel> (
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"ErrorRate", DoubleValue (0.05),
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"ErrorUnit", EnumValue (RateErrorModel::ERROR_UNIT_PACKET)
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);
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dev1.Get (1)->SetAttribute ("ReceiveErrorModel", PointerValue (em1));
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address.SetBase ("10.1.0.0", "255.255.255.0");
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address.Assign (dev1);
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Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
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ApplicationContainer apps;
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OnOffHelper onoff = OnOffHelper (sock_factory,
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InetSocketAddress (Ipv4Address ("10.2.0.2"), 2000));
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onoff.SetAttribute ("OnTime", StringValue ("ns3::ConstantRandomVariable[Constant=1]"));
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onoff.SetAttribute ("OffTime", StringValue ("ns3::ConstantRandomVariable[Constant=0]"));
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// Flow 1 - n
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for (uint32_t i = 0; i < m_nNodes; i++)
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{
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std::ostringstream oss;
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oss << "10.2." << i << ".2";
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onoff.SetAttribute ("Remote", AddressValue (InetSocketAddress (Ipv4Address (oss.str ().c_str ()), 2000)));
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onoff.SetAttribute ("PacketSize", StringValue ("1024"));
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onoff.SetAttribute ("DataRate", StringValue ("1Mbps"));
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onoff.SetAttribute ("StartTime", TimeValue (Seconds (startTime)));
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apps = onoff.Install (lefts.Get (i));
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}
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PacketSinkHelper sink = PacketSinkHelper (sock_factory,
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InetSocketAddress (Ipv4Address::GetAny (), 2000));
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apps = sink.Install (rights);
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apps.Start (Seconds (3.9999));
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if (enablePcap)
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{
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pointToPoint.EnablePcapAll ("nsc.pcap");
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}
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Simulator::Stop (Seconds (stopTime));
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Simulator::Run ();
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Ptr<PacketSink> pktsink;
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std::cout << "Total ";
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for (uint32_t i = 0; i < m_nNodes; i++)
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{
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pktsink = apps.Get (i)->GetObject<PacketSink> ();
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std::cout << "Rx(" << i << ") = " << pktsink->GetTotalRx () <<
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" bytes (" << pktsink->GetTotalRx () * 8 / (stopTime - startTime) << " bps), ";
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}
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std::cout << std::endl;
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Simulator::Destroy ();
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return 0;
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}
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