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