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/* -*- 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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// Default Network topology, 9 nodes in a star
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/*
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n2 n3 n4
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\ | /
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\|/
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n1---n0---n5
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/|\
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/ | \
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n8 n7 n6
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*/
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// - CBR Traffic goes from the star "arms" to the "hub"
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// - Tracing of queues and packet receptions to file
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// "tcp-star-server.tr"
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// - pcap traces also generated in the following files
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// "tcp-star-server-$n-$i.pcap" where n and i represent node and interface
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// numbers respectively
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// Usage examples for things you might want to tweak:
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// ./waf --run="tcp-star-server"
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// ./waf --run="tcp-star-server --nNodes=25"
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// ./waf --run="tcp-star-server --ns3::OnOffApplication::DataRate=10000"
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// ./waf --run="tcp-star-server --ns3::OnOffApplication::PacketSize=500"
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// See the ns-3 tutorial for more info on the command line:
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// http://www.nsnam.org/tutorials.html
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#include <iostream>
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#include <fstream>
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#include <string>
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#include <cassert>
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#include "ns3/core-module.h"
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#include "ns3/simulator-module.h"
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#include "ns3/node-module.h"
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#include "ns3/helper-module.h"
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#include "ns3/global-route-manager.h"
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE ("TcpServer");
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int
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main (int argc, char *argv[])
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{
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// Users may find it convenient to turn on explicit debugging
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// for selected modules; the below lines suggest how to do this
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//LogComponentEnable ("TcpServer", LOG_LEVEL_INFO);
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//LogComponentEnable ("TcpL4Protocol", LOG_LEVEL_ALL);
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//LogComponentEnable ("TcpSocketImpl", LOG_LEVEL_ALL);
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//LogComponentEnable ("PacketSink", LOG_LEVEL_ALL);
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//
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// Make the random number generators generate reproducible results.
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//
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RandomVariable::UseGlobalSeed (1, 1, 2, 3, 5, 8);
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// Set up some default values for the simulation.
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Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (250));
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Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("5kb/s"));
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uint32_t N = 9; //number of nodes in the star
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// Allow the user to override any of the defaults and the above
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// Config::SetDefault()s at run-time, via command-line arguments
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CommandLine cmd;
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cmd.AddValue("nNodes", "Number of nodes to place in the star", N);
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cmd.Parse (argc, argv);
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// Here, we will create N nodes in a star.
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NS_LOG_INFO ("Create nodes.");
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NodeContainer serverNode;
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NodeContainer clientNodes;
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serverNode.Create(1);
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clientNodes.Create(N-1);
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NodeContainer allNodes = NodeContainer(serverNode, clientNodes);
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// Install network stacks on the nodes
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InternetStackHelper internet;
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internet.Install (allNodes);
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//Collect an adjacency list of nodes for the p2p topology
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std::vector<NodeContainer> nodeAdjacencyList(N-1);
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for(uint32_t i=0; i<nodeAdjacencyList.size(); ++i)
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{
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nodeAdjacencyList[i] = NodeContainer (serverNode, clientNodes.Get (i));
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}
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// We create the channels first without any IP addressing information
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NS_LOG_INFO ("Create channels.");
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PointToPointHelper p2p;
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p2p.SetDeviceParameter ("DataRate", StringValue ("5Mbps"));
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p2p.SetChannelParameter ("Delay", StringValue ("2ms"));
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std::vector<NetDeviceContainer> deviceAdjacencyList(N-1);
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for(uint32_t i=0; i<deviceAdjacencyList.size(); ++i)
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{
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deviceAdjacencyList[i] = p2p.Install (nodeAdjacencyList[i]);
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}
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// Later, we add IP addresses.
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NS_LOG_INFO ("Assign IP Addresses.");
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Ipv4AddressHelper ipv4;
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std::vector<Ipv4InterfaceContainer> interfaceAdjacencyList(N-1);
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for(uint32_t i=0; i<interfaceAdjacencyList.size(); ++i)
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{
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std::ostringstream subnet;
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subnet<<"10.1."<<i+1<<".0";
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ipv4.SetBase (subnet.str().c_str(), "255.255.255.0");
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interfaceAdjacencyList[i] = ipv4.Assign (deviceAdjacencyList[i]);
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}
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//Turn on global static routing
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GlobalRouteManager::PopulateRoutingTables ();
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// Create a packet sink on the star "hub" to receive these packets
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uint16_t port = 50000;
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Address sinkLocalAddress(InetSocketAddress (Ipv4Address::GetAny (), port));
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PacketSinkHelper sinkHelper ("ns3::TcpSocketFactory", sinkLocalAddress);
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ApplicationContainer sinkApp = sinkHelper.Install (serverNode);
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sinkApp.Start (Seconds (1.0));
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sinkApp.Stop (Seconds (10.0));
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// Create the OnOff applications to send TCP to the server
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OnOffHelper clientHelper ("ns3::TcpSocketFactory", Address ());
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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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//normally wouldn't need a loop here but the server IP address is different
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//on each p2p subnet
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ApplicationContainer clientApps;
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for(uint32_t i=0; i<clientNodes.GetN(); ++i)
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{
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AddressValue remoteAddress
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(InetSocketAddress (interfaceAdjacencyList[i].GetAddress (0), port));
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clientHelper.SetAttribute ("Remote", remoteAddress);
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clientApps.Add(clientHelper.Install (clientNodes.Get(i)));
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}
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clientApps.Start (Seconds (1.0));
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clientApps.Stop (Seconds (10.0));
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//configure tracing
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std::ofstream ascii;
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ascii.open ("tcp-server.tr");
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PointToPointHelper::EnablePcapAll ("tcp-server");
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PointToPointHelper::EnableAsciiAll (ascii);
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NS_LOG_INFO ("Run Simulation.");
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Simulator::Run ();
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Simulator::Destroy ();
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NS_LOG_INFO ("Done.");
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return 0;
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}
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