160 lines
4.9 KiB
C++
160 lines
4.9 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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// BASED ON tcp-bulk-send.cc //
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// ============================================================ //
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// Network topology
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//
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// n0 ----------- n1
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// 500 Kbps
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// 5 ms
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//
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// - Flow from n0 to n1 using BulkSendApplication.
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// - Tracing of queues and packet receptions to file "tcp-pcap-nanosec-example.pcap"
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// when tracing is turned on.
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// - Trace file timestamps are recorded in nanoseconds, when requested
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//
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// ============================================================ //
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// NOTE: You can check the "magic" number of a pcap file with //
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// the following command: //
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// //
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// od -N4 -tx1 filename.pcap //
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// //
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// ============================================================ //
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#include <string>
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#include <fstream>
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#include "ns3/core-module.h"
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#include "ns3/point-to-point-module.h"
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#include "ns3/internet-module.h"
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#include "ns3/applications-module.h"
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#include "ns3/network-module.h"
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE ("TcpPcapNanosecExample");
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int
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main (int argc, char *argv[])
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{
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bool tracing = false;
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bool nanosec = false;
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uint32_t maxBytes = 0;
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//
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// Allow the user to override any of the defaults at
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// run-time, via command-line arguments
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//
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CommandLine cmd;
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cmd.AddValue ("tracing", "Flag to enable tracing", tracing);
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cmd.AddValue ("nanosec", "Flag to use nanosecond timestamps for pcap as default", nanosec);
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cmd.AddValue ("maxBytes",
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"Total number of bytes for application to send", maxBytes);
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cmd.Parse (argc, argv);
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//
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// If requested via the --nanosec cmdline flag, generate nanosecond timestamp for pcap traces
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//
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if (nanosec)
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{
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Config::SetDefault ("ns3::PcapFileWrapper::NanosecMode", BooleanValue (true));
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}
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//
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// Explicitly create the nodes required by the topology (shown above).
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//
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NS_LOG_INFO ("Create nodes.");
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NodeContainer nodes;
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nodes.Create (2);
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NS_LOG_INFO ("Create channels.");
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//
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// Explicitly create the point-to-point link required by the topology (shown above).
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//
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PointToPointHelper pointToPoint;
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pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("500Kbps"));
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pointToPoint.SetChannelAttribute ("Delay", StringValue ("5ms"));
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NetDeviceContainer devices;
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devices = pointToPoint.Install (nodes);
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//
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// Install the internet stack on the nodes
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//
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InternetStackHelper internet;
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internet.Install (nodes);
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//
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// We've got the "hardware" in place. Now we need to add IP addresses.
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//
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NS_LOG_INFO ("Assign IP Addresses.");
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Ipv4AddressHelper ipv4;
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ipv4.SetBase ("10.1.1.0", "255.255.255.0");
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Ipv4InterfaceContainer i = ipv4.Assign (devices);
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NS_LOG_INFO ("Create Applications.");
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//
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// Create a BulkSendApplication and install it on node 0
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//
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uint16_t port = 9; // well-known echo port number
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BulkSendHelper source ("ns3::TcpSocketFactory",
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InetSocketAddress (i.GetAddress (1), port));
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// Set the amount of data to send in bytes. Zero is unlimited.
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source.SetAttribute ("MaxBytes", UintegerValue (maxBytes));
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ApplicationContainer sourceApps = source.Install (nodes.Get (0));
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sourceApps.Start (Seconds (0.0));
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sourceApps.Stop (Seconds (10.0));
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//
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// Create a PacketSinkApplication and install it on node 1
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//
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PacketSinkHelper sink ("ns3::TcpSocketFactory",
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InetSocketAddress (Ipv4Address::GetAny (), port));
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ApplicationContainer sinkApps = sink.Install (nodes.Get (1));
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sinkApps.Start (Seconds (0.0));
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sinkApps.Stop (Seconds (10.0));
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//
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// Set up tracing if enabled
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//
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if (tracing)
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{
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AsciiTraceHelper ascii;
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pointToPoint.EnablePcapAll ("tcp-pcap-nanosec-example", false);
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}
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//
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// Now, do the actual simulation.
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//
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NS_LOG_INFO ("Run Simulation.");
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Simulator::Stop (Seconds (10.0));
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Simulator::Run ();
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Simulator::Destroy ();
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NS_LOG_INFO ("Done.");
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Ptr<PacketSink> sink1 = DynamicCast<PacketSink> (sinkApps.Get (0));
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std::cout << "Total Bytes Received: " << sink1->GetTotalRx () << std::endl;
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}
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