/* -*- 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
*
*/
//
// Network topology
//
// 100Kb/s, 10ms 1Mb/s, 10ms
// n0-----------------n1-----------------n2
//
//
// - Tracing of queues and packet receptions to file
// "tcp-small-transfer.tr"
// - pcap traces also generated in the following files
// "tcp-small-transfer.pcap-$n-$i" where n and i represent node and interface numbers respectively
// Usage (e.g.): ./waf --run tcp-small-transfer
#include <ctype.h>
#include <iostream>
#include <fstream>
#include <string>
#include <cassert>
#include "ns3/command-line.h"
#include "ns3/default-value.h"
#include "ns3/ptr.h"
#include "ns3/random-variable.h"
#include "ns3/log.h"
#include "ns3/simulator.h"
#include "ns3/nstime.h"
#include "ns3/data-rate.h"
#include "ns3/ascii-trace.h"
#include "ns3/pcap-trace.h"
#include "ns3/internet-node.h"
#include "ns3/point-to-point-channel.h"
#include "ns3/point-to-point-net-device.h"
#include "ns3/ipv4-address.h"
#include "ns3/inet-socket-address.h"
#include "ns3/ipv4.h"
#include "ns3/socket.h"
#include "ns3/ipv4-route.h"
#include "ns3/point-to-point-topology.h"
#include "ns3/onoff-application.h"
#include "ns3/packet-sink.h"
#include "ns3/error-model.h"
#include "ns3/node-list.h"
#include "ns3/config.h"
#include "ns3/tcp.h"
using namespace ns3;
NS_LOG_COMPONENT_DEFINE ("TcpSmallTransfer");
void
ApplicationTraceSink (Ptr<const Packet> packet,
const Address &addr)
{
// g_log is not declared in optimized builds
// should convert this to use of some other flag than the logging system
#ifdef NS3_LOG_ENABLE
if (!g_log.IsNoneEnabled ()) {
if (InetSocketAddress::IsMatchingType (addr) )
{
InetSocketAddress address = InetSocketAddress::ConvertFrom (addr);
std::cout << "PacketSink received size " <<
packet->GetSize () << " at time " <<
Simulator::Now ().GetSeconds () << " from address: " <<
address.GetIpv4 () << std::endl;
char buf[2000];
memcpy(buf, packet->PeekData (), packet->GetSize ());
for (uint32_t i=0; i < packet->GetSize (); i++)
{
std::cout << buf[i];
if (i && i % 60 == 0)
std::cout << std::endl;
}
std::cout << std::endl << std::endl;
}
}
#endif
}
void CloseConnection (Ptr<Socket> localSocket)
{
localSocket->Close ();
}
void StartFlow(Ptr<Socket> localSocket, uint32_t nBytes,
uint16_t servPort)
{
// NS_LOG_LOGIC("Starting flow at time " << Simulator::Now ().GetSeconds ());
localSocket->Connect (InetSocketAddress ("10.1.2.2", servPort));//connect
localSocket->SetConnectCallback (MakeCallback (&CloseConnection),
MakeNullCallback<void, Ptr<Socket> > (),
MakeNullCallback<void, Ptr<Socket> > ());
//we want to close as soon as the connection is established
//the tcp state machine and outgoing buffer will assure that
//all of the data is delivered
uint8_t data[nBytes];
for(uint32_t i = 0; i < nBytes; ++i)
{
char m = toascii (97 + i % 26);
data[i] = m;
}
localSocket->Send (data, nBytes);
}
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("TcpL4Protocol", LOG_LEVEL_ALL);
// LogComponentEnable("TcpSocket", LOG_LEVEL_ALL);
// LogComponentEnable("PacketSink", LOG_LEVEL_ALL);
LogComponentEnable("TcpSmallTransfer", LOG_LEVEL_ALL);
// Allow the user to override any of the defaults and the above
// Bind()s at run-time, via command-line arguments
CommandLine::Parse (argc, argv);
// Here, we will explicitly create three nodes. In more sophisticated
// topologies, we could configure a node factory.
Ptr<Node> n0 = Create<InternetNode> ();
Ptr<Node> n1 = Create<InternetNode> ();
Ptr<Node> n2 = Create<InternetNode> ();
// We create the channels first without any IP addressing information
Ptr<PointToPointChannel> channel0 =
PointToPointTopology::AddPointToPointLink (
n0, n1, DataRate(1000000), MilliSeconds(10));
// Later, we add IP addresses.
PointToPointTopology::AddIpv4Addresses (
channel0, n0, Ipv4Address("10.1.3.1"),
n1, Ipv4Address("10.1.3.2"));
Ptr<PointToPointChannel> channel1 =
PointToPointTopology::AddPointToPointLink (
n1, n2, DataRate(100000), MilliSeconds(10));
PointToPointTopology::AddIpv4Addresses (
channel1, n1, Ipv4Address("10.1.2.1"),
n2, Ipv4Address("10.1.2.2"));
// Finally, we add static routes. These three steps (Channel and
// NetDevice creation, IP Address assignment, and routing) are
// separated because there may be a need to postpone IP Address
// assignment (emulation) or modify to use dynamic routing
PointToPointTopology::AddIpv4Routes(n0, n1, channel0);
PointToPointTopology::AddIpv4Routes(n1, n2, channel1);
Ptr<Ipv4> ipv4;
ipv4 = n0->GetObject<Ipv4> ();
ipv4->SetDefaultRoute (Ipv4Address ("10.1.3.2"), 1);
ipv4 = n2->GetObject<Ipv4> ();
ipv4->SetDefaultRoute (Ipv4Address ("10.1.2.1"), 1);
///////////////////////////////////////////////////////////////////////////
// Simulation 1
//
// Send 2000 bytes over a connection to server port 500 at time 0
// Should observe SYN exchange, two data segments, and FIN exchange
//
///////////////////////////////////////////////////////////////////////////
int nBytes = 2000;
uint16_t servPort = 500;
Ptr<SocketFactory> socketFactory =
n0->GetObject<SocketFactory> ();
Ptr<Socket> localSocket = socketFactory->CreateSocket ();
localSocket->Bind ();
// Create a packet sink to receive these packets
Ptr<PacketSink> sink =
CreateObjectWith<PacketSink> (
"Node", n2,
"Local", Address (InetSocketAddress (Ipv4Address::GetAny (), servPort)),
"Protocol", TypeId::LookupByName ("Tcp"));
n2->AddApplication (sink);
sink->Start (Seconds (0.0));
sink->Stop (Seconds (100.0));
Simulator::Schedule(Seconds(0), &StartFlow, localSocket, nBytes,
servPort);
// Configure tracing of all enqueue, dequeue, and NetDevice receive events
// Trace output will be sent to the simple-examples.tr file
AsciiTrace asciitrace ("tcp-small-transfer.tr");
asciitrace.TraceAllQueues ();
asciitrace.TraceAllNetDeviceRx ();
// Also configure some tcpdump traces; each interface will be traced
// The output files will be named
// simple-examples.pcap-<nodeId>-<interfaceId>
// and can be read by the "tcpdump -r" command (use "-tt" option to
// display timestamps correctly)
PcapTrace pcaptrace ("tcp-small-transfer.pcap");
pcaptrace.TraceAllIp ();
Config::Connect ("/NodeList/*/ApplicationList/*/Rx", MakeCallback (&ApplicationTraceSink));
Simulator::StopAt (Seconds(1000));
Simulator::Run ();
Simulator::Destroy ();
}