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/* -*- 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
*
*/
// Default Network topology, 9 nodes in a star
/*
n2 n3 n4
\ | /
\|/
n1---n0---n5
/| \
/ | \
n8 n7 n6
*/
// - CBR Traffic goes from the star "arms" to the "hub"
// - Tracing of queues and packet receptions to file
// "tcp-star-server.tr"
// - pcap traces also generated in the following files
// "tcp-star-server-$n-$i.pcap" where n and i represent node and interface
// numbers respectively
// Usage examples for things you might want to tweak:
// ./waf --run="tcp-star-server"
// ./waf --run="tcp-star-server --nNodes=25"
// ./waf --run="tcp-star-server --ns3::OnOffApplication::DataRate=10000"
// ./waf --run="tcp-star-server --ns3::OnOffApplication::PacketSize=500"
// See the ns-3 tutorial for more info on the command line:
// http://www.nsnam.org/tutorials.html
#include <iostream>
#include <fstream>
#include <string>
#include <cassert>
#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/ipv4-global-routing-helper.h"
using namespace ns3;
NS_LOG_COMPONENT_DEFINE ("TcpServer");
int
main (int argc, char *argv[])
{
// Users may find it convenient to turn on explicit debugging
// for selected modules; the below lines suggest how to do this
//LogComponentEnable ("TcpServer", LOG_LEVEL_INFO);
//LogComponentEnable ("TcpL4Protocol", LOG_LEVEL_ALL);
//LogComponentEnable ("TcpSocketImpl", LOG_LEVEL_ALL);
//LogComponentEnable ("PacketSink", LOG_LEVEL_ALL);
// Set up some default values for the simulation.
Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (250));
Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("5kb/s"));
uint32_t N = 9; //number of nodes in the star
// Allow the user to override any of the defaults and the above
// Config::SetDefault()s at run-time, via command-line arguments
CommandLine cmd;
cmd.AddValue ("nNodes", "Number of nodes to place in the star", N);
cmd.Parse (argc, argv);
// Here, we will create N nodes in a star.
NS_LOG_INFO ("Create nodes.");
NodeContainer serverNode;
NodeContainer clientNodes;
serverNode.Create (1);
clientNodes.Create (N-1);
NodeContainer allNodes = NodeContainer (serverNode, clientNodes);
// Install network stacks on the nodes
InternetStackHelper internet;
internet.Install (allNodes);
//Collect an adjacency list of nodes for the p2p topology
std::vector<NodeContainer> nodeAdjacencyList (N-1);
for(uint32_t i=0; i<nodeAdjacencyList.size (); ++i)
{
nodeAdjacencyList[i] = NodeContainer (serverNode, clientNodes.Get (i));
}
// 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"));
std::vector<NetDeviceContainer> deviceAdjacencyList (N-1);
for(uint32_t i=0; i<deviceAdjacencyList.size (); ++i)
{
deviceAdjacencyList[i] = p2p.Install (nodeAdjacencyList[i]);
}
// Later, we add IP addresses.
NS_LOG_INFO ("Assign IP Addresses.");
Ipv4AddressHelper ipv4;
std::vector<Ipv4InterfaceContainer> interfaceAdjacencyList (N-1);
for(uint32_t i=0; i<interfaceAdjacencyList.size (); ++i)
{
std::ostringstream subnet;
subnet<<"10.1."<<i+1<<".0";
ipv4.SetBase (subnet.str ().c_str (), "255.255.255.0");
interfaceAdjacencyList[i] = ipv4.Assign (deviceAdjacencyList[i]);
}
//Turn on global static routing
Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
// Create a packet sink on the star "hub" to receive these packets
uint16_t port = 50000;
Address sinkLocalAddress (InetSocketAddress (Ipv4Address::GetAny (), port));
PacketSinkHelper sinkHelper ("ns3::TcpSocketFactory", sinkLocalAddress);
ApplicationContainer sinkApp = sinkHelper.Install (serverNode);
sinkApp.Start (Seconds (1.0));
sinkApp.Stop (Seconds (10.0));
// Create the OnOff applications to send TCP to the server
OnOffHelper clientHelper ("ns3::TcpSocketFactory", Address ());
clientHelper.SetAttribute ("OnTime", StringValue ("ns3::ConstantRandomVariable[Constant=1]"));
clientHelper.SetAttribute ("OffTime", StringValue ("ns3::ConstantRandomVariable[Constant=0]"));
//normally wouldn't need a loop here but the server IP address is different
//on each p2p subnet
ApplicationContainer clientApps;
for(uint32_t i=0; i<clientNodes.GetN (); ++i)
{
AddressValue remoteAddress
(InetSocketAddress (interfaceAdjacencyList[i].GetAddress (0), port));
clientHelper.SetAttribute ("Remote", remoteAddress);
clientApps.Add (clientHelper.Install (clientNodes.Get (i)));
}
clientApps.Start (Seconds (1.0));
clientApps.Stop (Seconds (10.0));
//configure tracing
AsciiTraceHelper ascii;
p2p.EnableAsciiAll (ascii.CreateFileStream ("tcp-star-server.tr"));
p2p.EnablePcapAll ("tcp-star-server");
NS_LOG_INFO ("Run Simulation.");
Simulator::Run ();
Simulator::Destroy ();
NS_LOG_INFO ("Done.");
return 0;
}
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