A Discrete-Event Network Simulator
API
tcp-variants-comparison.cc
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2013 ResiliNets, ITTC, University of Kansas
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * Authors: Justin P. Rohrer, Truc Anh N. Nguyen <annguyen@ittc.ku.edu>, Siddharth Gangadhar <siddharth@ittc.ku.edu>
19  *
20  * James P.G. Sterbenz <jpgs@ittc.ku.edu>, director
21  * ResiliNets Research Group http://wiki.ittc.ku.edu/resilinets
22  * Information and Telecommunication Technology Center (ITTC)
23  * and Department of Electrical Engineering and Computer Science
24  * The University of Kansas Lawrence, KS USA.
25  *
26  * Work supported in part by NSF FIND (Future Internet Design) Program
27  * under grant CNS-0626918 (Postmodern Internet Architecture),
28  * NSF grant CNS-1050226 (Multilayer Network Resilience Analysis and Experimentation on GENI),
29  * US Department of Defense (DoD), and ITTC at The University of Kansas.
30  *
31  * “TCP Westwood(+) Protocol Implementation in ns-3”
32  * Siddharth Gangadhar, Trúc Anh Ngọc Nguyễn , Greeshma Umapathi, and James P.G. Sterbenz,
33  * ICST SIMUTools Workshop on ns-3 (WNS3), Cannes, France, March 2013
34  */
35 
36 #include <iostream>
37 #include <fstream>
38 #include <string>
39 
40 #include "ns3/core-module.h"
41 #include "ns3/network-module.h"
42 #include "ns3/internet-module.h"
43 #include "ns3/point-to-point-module.h"
44 #include "ns3/applications-module.h"
45 #include "ns3/error-model.h"
46 #include "ns3/tcp-header.h"
47 #include "ns3/udp-header.h"
48 #include "ns3/enum.h"
49 #include "ns3/event-id.h"
50 #include "ns3/flow-monitor-helper.h"
51 #include "ns3/ipv4-global-routing-helper.h"
52 #include "ns3/traffic-control-module.h"
53 
54 using namespace ns3;
55 
56 NS_LOG_COMPONENT_DEFINE ("TcpVariantsComparison");
57 
58 static bool firstCwnd = true;
59 static bool firstSshThr = true;
60 static bool firstRtt = true;
61 static bool firstRto = true;
69 static uint32_t cWndValue;
70 static uint32_t ssThreshValue;
71 
72 
73 static void
74 CwndTracer (uint32_t oldval, uint32_t newval)
75 {
76  if (firstCwnd)
77  {
78  *cWndStream->GetStream () << "0.0 " << oldval << std::endl;
79  firstCwnd = false;
80  }
81  *cWndStream->GetStream () << Simulator::Now ().GetSeconds () << " " << newval << std::endl;
82  cWndValue = newval;
83 
84  if (!firstSshThr)
85  {
86  *ssThreshStream->GetStream () << Simulator::Now ().GetSeconds () << " " << ssThreshValue << std::endl;
87  }
88 }
89 
90 static void
91 SsThreshTracer (uint32_t oldval, uint32_t newval)
92 {
93  if (firstSshThr)
94  {
95  *ssThreshStream->GetStream () << "0.0 " << oldval << std::endl;
96  firstSshThr = false;
97  }
98  *ssThreshStream->GetStream () << Simulator::Now ().GetSeconds () << " " << newval << std::endl;
99  ssThreshValue = newval;
100 
101  if (!firstCwnd)
102  {
103  *cWndStream->GetStream () << Simulator::Now ().GetSeconds () << " " << cWndValue << std::endl;
104  }
105 }
106 
107 static void
108 RttTracer (Time oldval, Time newval)
109 {
110  if (firstRtt)
111  {
112  *rttStream->GetStream () << "0.0 " << oldval.GetSeconds () << std::endl;
113  firstRtt = false;
114  }
115  *rttStream->GetStream () << Simulator::Now ().GetSeconds () << " " << newval.GetSeconds () << std::endl;
116 }
117 
118 static void
119 RtoTracer (Time oldval, Time newval)
120 {
121  if (firstRto)
122  {
123  *rtoStream->GetStream () << "0.0 " << oldval.GetSeconds () << std::endl;
124  firstRto = false;
125  }
126  *rtoStream->GetStream () << Simulator::Now ().GetSeconds () << " " << newval.GetSeconds () << std::endl;
127 }
128 
129 static void
131 {
132  NS_UNUSED (old);
133  *nextTxStream->GetStream () << Simulator::Now ().GetSeconds () << " " << nextTx << std::endl;
134 }
135 
136 static void
137 InFlightTracer (uint32_t old, uint32_t inFlight)
138 {
139  NS_UNUSED (old);
140  *inFlightStream->GetStream () << Simulator::Now ().GetSeconds () << " " << inFlight << std::endl;
141 }
142 
143 static void
145 {
146  NS_UNUSED (old);
147  *nextRxStream->GetStream () << Simulator::Now ().GetSeconds () << " " << nextRx << std::endl;
148 }
149 
150 static void
151 TraceCwnd (std::string cwnd_tr_file_name)
152 {
153  AsciiTraceHelper ascii;
154  cWndStream = ascii.CreateFileStream (cwnd_tr_file_name.c_str ());
155  Config::ConnectWithoutContext ("/NodeList/1/$ns3::TcpL4Protocol/SocketList/0/CongestionWindow", MakeCallback (&CwndTracer));
156 }
157 
158 static void
159 TraceSsThresh (std::string ssthresh_tr_file_name)
160 {
161  AsciiTraceHelper ascii;
162  ssThreshStream = ascii.CreateFileStream (ssthresh_tr_file_name.c_str ());
163  Config::ConnectWithoutContext ("/NodeList/1/$ns3::TcpL4Protocol/SocketList/0/SlowStartThreshold", MakeCallback (&SsThreshTracer));
164 }
165 
166 static void
167 TraceRtt (std::string rtt_tr_file_name)
168 {
169  AsciiTraceHelper ascii;
170  rttStream = ascii.CreateFileStream (rtt_tr_file_name.c_str ());
171  Config::ConnectWithoutContext ("/NodeList/1/$ns3::TcpL4Protocol/SocketList/0/RTT", MakeCallback (&RttTracer));
172 }
173 
174 static void
175 TraceRto (std::string rto_tr_file_name)
176 {
177  AsciiTraceHelper ascii;
178  rtoStream = ascii.CreateFileStream (rto_tr_file_name.c_str ());
179  Config::ConnectWithoutContext ("/NodeList/1/$ns3::TcpL4Protocol/SocketList/0/RTO", MakeCallback (&RtoTracer));
180 }
181 
182 static void
183 TraceNextTx (std::string &next_tx_seq_file_name)
184 {
185  AsciiTraceHelper ascii;
186  nextTxStream = ascii.CreateFileStream (next_tx_seq_file_name.c_str ());
187  Config::ConnectWithoutContext ("/NodeList/1/$ns3::TcpL4Protocol/SocketList/0/NextTxSequence", MakeCallback (&NextTxTracer));
188 }
189 
190 static void
191 TraceInFlight (std::string &in_flight_file_name)
192 {
193  AsciiTraceHelper ascii;
194  inFlightStream = ascii.CreateFileStream (in_flight_file_name.c_str ());
195  Config::ConnectWithoutContext ("/NodeList/1/$ns3::TcpL4Protocol/SocketList/0/BytesInFlight", MakeCallback (&InFlightTracer));
196 }
197 
198 
199 static void
200 TraceNextRx (std::string &next_rx_seq_file_name)
201 {
202  AsciiTraceHelper ascii;
203  nextRxStream = ascii.CreateFileStream (next_rx_seq_file_name.c_str ());
204  Config::ConnectWithoutContext ("/NodeList/2/$ns3::TcpL4Protocol/SocketList/1/RxBuffer/NextRxSequence", MakeCallback (&NextRxTracer));
205 }
206 
207 int main (int argc, char *argv[])
208 {
209  std::string transport_prot = "TcpWestwood";
210  double error_p = 0.0;
211  std::string bandwidth = "2Mbps";
212  std::string delay = "0.01ms";
213  std::string access_bandwidth = "10Mbps";
214  std::string access_delay = "45ms";
215  bool tracing = false;
216  std::string prefix_file_name = "TcpVariantsComparison";
217  uint64_t data_mbytes = 0;
218  uint32_t mtu_bytes = 400;
219  uint16_t num_flows = 1;
220  double duration = 100.0;
221  uint32_t run = 0;
222  bool flow_monitor = false;
223  bool pcap = false;
224  bool sack = true;
225  std::string queue_disc_type = "ns3::PfifoFastQueueDisc";
226  std::string recovery = "ns3::TcpClassicRecovery";
227 
228 
230  cmd.AddValue ("transport_prot", "Transport protocol to use: TcpNewReno, "
231  "TcpHybla, TcpHighSpeed, TcpHtcp, TcpVegas, TcpScalable, TcpVeno, "
232  "TcpBic, TcpYeah, TcpIllinois, TcpWestwood, TcpWestwoodPlus, TcpLedbat, "
233  "TcpLp, TcpDctcp", transport_prot);
234  cmd.AddValue ("error_p", "Packet error rate", error_p);
235  cmd.AddValue ("bandwidth", "Bottleneck bandwidth", bandwidth);
236  cmd.AddValue ("delay", "Bottleneck delay", delay);
237  cmd.AddValue ("access_bandwidth", "Access link bandwidth", access_bandwidth);
238  cmd.AddValue ("access_delay", "Access link delay", access_delay);
239  cmd.AddValue ("tracing", "Flag to enable/disable tracing", tracing);
240  cmd.AddValue ("prefix_name", "Prefix of output trace file", prefix_file_name);
241  cmd.AddValue ("data", "Number of Megabytes of data to transmit", data_mbytes);
242  cmd.AddValue ("mtu", "Size of IP packets to send in bytes", mtu_bytes);
243  cmd.AddValue ("num_flows", "Number of flows", num_flows);
244  cmd.AddValue ("duration", "Time to allow flows to run in seconds", duration);
245  cmd.AddValue ("run", "Run index (for setting repeatable seeds)", run);
246  cmd.AddValue ("flow_monitor", "Enable flow monitor", flow_monitor);
247  cmd.AddValue ("pcap_tracing", "Enable or disable PCAP tracing", pcap);
248  cmd.AddValue ("queue_disc_type", "Queue disc type for gateway (e.g. ns3::CoDelQueueDisc)", queue_disc_type);
249  cmd.AddValue ("sack", "Enable or disable SACK option", sack);
250  cmd.AddValue ("recovery", "Recovery algorithm type to use (e.g., ns3::TcpPrrRecovery", recovery);
251  cmd.Parse (argc, argv);
252 
253  transport_prot = std::string ("ns3::") + transport_prot;
254 
256  SeedManager::SetRun (run);
257 
258  // User may find it convenient to enable logging
259  //LogComponentEnable("TcpVariantsComparison", LOG_LEVEL_ALL);
260  //LogComponentEnable("BulkSendApplication", LOG_LEVEL_INFO);
261  //LogComponentEnable("PfifoFastQueueDisc", LOG_LEVEL_ALL);
262 
263  // Calculate the ADU size
264  Header* temp_header = new Ipv4Header ();
265  uint32_t ip_header = temp_header->GetSerializedSize ();
266  NS_LOG_LOGIC ("IP Header size is: " << ip_header);
267  delete temp_header;
268  temp_header = new TcpHeader ();
269  uint32_t tcp_header = temp_header->GetSerializedSize ();
270  NS_LOG_LOGIC ("TCP Header size is: " << tcp_header);
271  delete temp_header;
272  uint32_t tcp_adu_size = mtu_bytes - 20 - (ip_header + tcp_header);
273  NS_LOG_LOGIC ("TCP ADU size is: " << tcp_adu_size);
274 
275  // Set the simulation start and stop time
276  double start_time = 0.1;
277  double stop_time = start_time + duration;
278 
279  // 2 MB of TCP buffer
280  Config::SetDefault ("ns3::TcpSocket::RcvBufSize", UintegerValue (1 << 21));
281  Config::SetDefault ("ns3::TcpSocket::SndBufSize", UintegerValue (1 << 21));
282  Config::SetDefault ("ns3::TcpSocketBase::Sack", BooleanValue (sack));
283 
284  Config::SetDefault ("ns3::TcpL4Protocol::RecoveryType",
285  TypeIdValue (TypeId::LookupByName (recovery)));
286  // Select TCP variant
287  if (transport_prot.compare ("ns3::TcpWestwoodPlus") == 0)
288  {
289  // TcpWestwoodPlus is not an actual TypeId name; we need TcpWestwood here
290  Config::SetDefault ("ns3::TcpL4Protocol::SocketType", TypeIdValue (TcpWestwood::GetTypeId ()));
291  // the default protocol type in ns3::TcpWestwood is WESTWOOD
292  Config::SetDefault ("ns3::TcpWestwood::ProtocolType", EnumValue (TcpWestwood::WESTWOODPLUS));
293  }
294  else
295  {
296  TypeId tcpTid;
297  NS_ABORT_MSG_UNLESS (TypeId::LookupByNameFailSafe (transport_prot, &tcpTid), "TypeId " << transport_prot << " not found");
298  Config::SetDefault ("ns3::TcpL4Protocol::SocketType", TypeIdValue (TypeId::LookupByName (transport_prot)));
299  }
300 
301  // Create gateways, sources, and sinks
302  NodeContainer gateways;
303  gateways.Create (1);
304  NodeContainer sources;
305  sources.Create (num_flows);
306  NodeContainer sinks;
307  sinks.Create (num_flows);
308 
309  // Configure the error model
310  // Here we use RateErrorModel with packet error rate
311  Ptr<UniformRandomVariable> uv = CreateObject<UniformRandomVariable> ();
312  uv->SetStream (50);
313  RateErrorModel error_model;
314  error_model.SetRandomVariable (uv);
316  error_model.SetRate (error_p);
317 
318  PointToPointHelper UnReLink;
319  UnReLink.SetDeviceAttribute ("DataRate", StringValue (bandwidth));
320  UnReLink.SetChannelAttribute ("Delay", StringValue (delay));
321  UnReLink.SetDeviceAttribute ("ReceiveErrorModel", PointerValue (&error_model));
322 
323 
325  stack.InstallAll ();
326 
327  TrafficControlHelper tchPfifo;
328  tchPfifo.SetRootQueueDisc ("ns3::PfifoFastQueueDisc");
329 
330  TrafficControlHelper tchCoDel;
331  tchCoDel.SetRootQueueDisc ("ns3::CoDelQueueDisc");
332 
334  address.SetBase ("10.0.0.0", "255.255.255.0");
335 
336  // Configure the sources and sinks net devices
337  // and the channels between the sources/sinks and the gateways
338  PointToPointHelper LocalLink;
339  LocalLink.SetDeviceAttribute ("DataRate", StringValue (access_bandwidth));
340  LocalLink.SetChannelAttribute ("Delay", StringValue (access_delay));
341 
342  Ipv4InterfaceContainer sink_interfaces;
343 
344  DataRate access_b (access_bandwidth);
345  DataRate bottle_b (bandwidth);
346  Time access_d (access_delay);
347  Time bottle_d (delay);
348 
349  uint32_t size = static_cast<uint32_t>((std::min (access_b, bottle_b).GetBitRate () / 8) *
350  ((access_d + bottle_d) * 2).GetSeconds ());
351 
352  Config::SetDefault ("ns3::PfifoFastQueueDisc::MaxSize",
353  QueueSizeValue (QueueSize (QueueSizeUnit::PACKETS, size / mtu_bytes)));
354  Config::SetDefault ("ns3::CoDelQueueDisc::MaxSize",
356 
357  for (uint32_t i = 0; i < num_flows; i++)
358  {
360  devices = LocalLink.Install (sources.Get (i), gateways.Get (0));
361  tchPfifo.Install (devices);
362  address.NewNetwork ();
364 
365  devices = UnReLink.Install (gateways.Get (0), sinks.Get (i));
366  if (queue_disc_type.compare ("ns3::PfifoFastQueueDisc") == 0)
367  {
368  tchPfifo.Install (devices);
369  }
370  else if (queue_disc_type.compare ("ns3::CoDelQueueDisc") == 0)
371  {
372  tchCoDel.Install (devices);
373  }
374  else
375  {
376  NS_FATAL_ERROR ("Queue not recognized. Allowed values are ns3::CoDelQueueDisc or ns3::PfifoFastQueueDisc");
377  }
378  address.NewNetwork ();
379  interfaces = address.Assign (devices);
380  sink_interfaces.Add (interfaces.Get (1));
381  }
382 
383  NS_LOG_INFO ("Initialize Global Routing.");
385 
386  uint16_t port = 50000;
387  Address sinkLocalAddress (InetSocketAddress (Ipv4Address::GetAny (), port));
388  PacketSinkHelper sinkHelper ("ns3::TcpSocketFactory", sinkLocalAddress);
389 
390  for (uint16_t i = 0; i < sources.GetN (); i++)
391  {
392  AddressValue remoteAddress (InetSocketAddress (sink_interfaces.GetAddress (i, 0), port));
393  Config::SetDefault ("ns3::TcpSocket::SegmentSize", UintegerValue (tcp_adu_size));
394  BulkSendHelper ftp ("ns3::TcpSocketFactory", Address ());
395  ftp.SetAttribute ("Remote", remoteAddress);
396  ftp.SetAttribute ("SendSize", UintegerValue (tcp_adu_size));
397  ftp.SetAttribute ("MaxBytes", UintegerValue (data_mbytes * 1000000));
398 
399  ApplicationContainer sourceApp = ftp.Install (sources.Get (i));
400  sourceApp.Start (Seconds (start_time * i));
401  sourceApp.Stop (Seconds (stop_time - 3));
402 
403  sinkHelper.SetAttribute ("Protocol", TypeIdValue (TcpSocketFactory::GetTypeId ()));
404  ApplicationContainer sinkApp = sinkHelper.Install (sinks.Get (i));
405  sinkApp.Start (Seconds (start_time * i));
406  sinkApp.Stop (Seconds (stop_time));
407  }
408 
409  // Set up tracing if enabled
410  if (tracing)
411  {
412  std::ofstream ascii;
413  Ptr<OutputStreamWrapper> ascii_wrap;
414  ascii.open ((prefix_file_name + "-ascii").c_str ());
415  ascii_wrap = new OutputStreamWrapper ((prefix_file_name + "-ascii").c_str (),
416  std::ios::out);
417  stack.EnableAsciiIpv4All (ascii_wrap);
418 
419  Simulator::Schedule (Seconds (0.00001), &TraceCwnd, prefix_file_name + "-cwnd.data");
420  Simulator::Schedule (Seconds (0.00001), &TraceSsThresh, prefix_file_name + "-ssth.data");
421  Simulator::Schedule (Seconds (0.00001), &TraceRtt, prefix_file_name + "-rtt.data");
422  Simulator::Schedule (Seconds (0.00001), &TraceRto, prefix_file_name + "-rto.data");
423  Simulator::Schedule (Seconds (0.00001), &TraceNextTx, prefix_file_name + "-next-tx.data");
424  Simulator::Schedule (Seconds (0.00001), &TraceInFlight, prefix_file_name + "-inflight.data");
425  Simulator::Schedule (Seconds (0.1), &TraceNextRx, prefix_file_name + "-next-rx.data");
426  }
427 
428  if (pcap)
429  {
430  UnReLink.EnablePcapAll (prefix_file_name, true);
431  LocalLink.EnablePcapAll (prefix_file_name, true);
432  }
433 
434  // Flow monitor
435  FlowMonitorHelper flowHelper;
436  if (flow_monitor)
437  {
438  flowHelper.InstallAll ();
439  }
440 
441  Simulator::Stop (Seconds (stop_time));
442  Simulator::Run ();
443 
444  if (flow_monitor)
445  {
446  flowHelper.SerializeToXmlFile (prefix_file_name + ".flowmonitor", true, true);
447  }
448 
450  return 0;
451 }
Protocol header serialization and deserialization.
Definition: header.h:42
holds a vector of ns3::Application pointers.
static Ptr< OutputStreamWrapper > nextTxStream
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:102
Manage ASCII trace files for device models.
Definition: trace-helper.h:161
an Inet address class
static Ipv4Address GetAny(void)
void SetStream(int64_t stream)
Specifies the stream number for the RngStream.
AttributeValue implementation for Boolean.
Definition: boolean.h:36
QueueDiscContainer Install(NetDeviceContainer c)
Class for representing queue sizes.
Definition: queue-size.h:94
A helper to make it easier to instantiate an ns3::BulkSendApplication on a set of nodes...
holds a vector of std::pair of Ptr<Ipv4> and interface index.
static void PopulateRoutingTables(void)
Build a routing database and initialize the routing tables of the nodes in the simulation.
Hold variables of type string.
Definition: string.h:41
#define min(a, b)
Definition: 80211b.c:42
static Ptr< OutputStreamWrapper > nextRxStream
NetDeviceContainer Install(NodeContainer c)
static void TraceNextRx(std::string &next_rx_seq_file_name)
void Add(const Ipv4InterfaceContainer &other)
Concatenate the entries in the other container with ours.
static uint32_t ssThreshValue
static uint32_t cWndValue
double GetSeconds(void) const
Get an approximation of the time stored in this instance in the indicated unit.
Definition: nstime.h:355
static void Run(void)
Run the simulation.
Definition: simulator.cc:170
static Ptr< OutputStreamWrapper > cWndStream
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:205
aggregate IP/TCP/UDP functionality to existing Nodes.
#define NS_UNUSED(x)
Mark a local variable as unused.
Definition: unused.h:36
#define NS_LOG_INFO(msg)
Use NS_LOG to output a message of level LOG_INFO.
Definition: log.h:281
#define NS_FATAL_ERROR(msg)
Report a fatal error with a message and terminate.
Definition: fatal-error.h:162
A helper to make it easier to instantiate an ns3::PacketSinkApplication on a set of nodes...
cmd
Definition: second.py:35
static bool LookupByNameFailSafe(std::string name, TypeId *tid)
Get a TypeId by name.
Definition: type-id.cc:837
Ptr< OutputStreamWrapper > CreateFileStream(std::string filename, std::ios::openmode filemode=std::ios::out)
Create and initialize an output stream object we&#39;ll use to write the traced bits. ...
Build a set of PointToPointNetDevice objects.
void SetDeviceAttribute(std::string name, const AttributeValue &value)
Set an attribute value to be propagated to each NetDevice created by the helper.
stack
Definition: first.py:41
void SerializeToXmlFile(std::string fileName, bool enableHistograms, bool enableProbes)
Same as SerializeToXmlStream, but writes to a file instead.
static void SetRun(uint64_t run)
Set the run number of simulation.
uint16_t port
Definition: dsdv-manet.cc:45
a polymophic address class
Definition: address.h:90
Class for representing data rates.
Definition: data-rate.h:88
Packet header for IPv4.
Definition: ipv4-header.h:33
static Ptr< OutputStreamWrapper > rttStream
static void RttTracer(Time oldval, Time newval)
void EnablePcapAll(std::string prefix, bool promiscuous=false)
Enable pcap output on each device (which is of the appropriate type) in the set of all nodes created ...
Hold variables of type enum.
Definition: enum.h:54
static EventId Schedule(Time const &delay, MEM mem_ptr, OBJ obj)
Schedule an event to expire after delay.
Definition: simulator.h:1390
Ipv4Address GetAddress(uint32_t i, uint32_t j=0) const
Hold an unsigned integer type.
Definition: uinteger.h:44
Use number of packets for queue size.
Definition: queue-size.h:44
void SetRate(double rate)
Definition: error-model.cc:208
holds a vector of ns3::NetDevice pointers
A class encapsulating an output stream.
static void InFlightTracer(uint32_t old, uint32_t inFlight)
AttributeValue implementation for TypeId.
Definition: type-id.h:611
Callback< R > MakeCallback(R(T::*memPtr)(void), OBJ objPtr)
Definition: callback.h:1610
void ConnectWithoutContext(std::string path, const CallbackBase &cb)
Definition: config.cc:862
Build a set of QueueDisc objects.
Ptr< FlowMonitor > InstallAll()
Enable flow monitoring on all nodes.
void Start(Time start)
Arrange for all of the Applications in this container to Start() at the Time given as a parameter...
Parse command-line arguments.
Definition: command-line.h:212
static void Destroy(void)
Execute the events scheduled with ScheduleDestroy().
Definition: simulator.cc:134
static void CwndTracer(uint32_t oldval, uint32_t newval)
static TypeId GetTypeId(void)
Get the type ID.
uint32_t GetN(void) const
Get the number of Ptr<Node> stored in this container.
Every class exported by the ns3 library is enclosed in the ns3 namespace.
keep track of a set of node pointers.
Hold objects of type Ptr<T>.
Definition: pointer.h:36
address
Definition: first.py:44
static void TraceSsThresh(std::string ssthresh_tr_file_name)
uint16_t SetRootQueueDisc(std::string type, std::string n01="", const AttributeValue &v01=EmptyAttributeValue(), std::string n02="", const AttributeValue &v02=EmptyAttributeValue(), std::string n03="", const AttributeValue &v03=EmptyAttributeValue(), std::string n04="", const AttributeValue &v04=EmptyAttributeValue(), std::string n05="", const AttributeValue &v05=EmptyAttributeValue(), std::string n06="", const AttributeValue &v06=EmptyAttributeValue(), std::string n07="", const AttributeValue &v07=EmptyAttributeValue(), std::string n08="", const AttributeValue &v08=EmptyAttributeValue(), std::string n09="", const AttributeValue &v09=EmptyAttributeValue(), std::string n10="", const AttributeValue &v10=EmptyAttributeValue(), std::string n11="", const AttributeValue &v11=EmptyAttributeValue(), std::string n12="", const AttributeValue &v12=EmptyAttributeValue(), std::string n13="", const AttributeValue &v13=EmptyAttributeValue(), std::string n14="", const AttributeValue &v14=EmptyAttributeValue(), std::string n15="", const AttributeValue &v15=EmptyAttributeValue())
Helper function used to set a root queue disc of the given type and with the given attributes...
virtual uint32_t GetSerializedSize(void) const =0
Header for the Transmission Control Protocol.
Definition: tcp-header.h:44
static Ptr< OutputStreamWrapper > inFlightStream
static TypeId GetTypeId(void)
Get the type ID.
Definition: tcp-westwood.cc:47
static Ptr< OutputStreamWrapper > rtoStream
Helper to enable IP flow monitoring on a set of Nodes.
static bool firstSshThr
static Time Now(void)
Return the current simulation virtual time.
Definition: simulator.cc:193
static void NextRxTracer(SequenceNumber32 old, SequenceNumber32 nextRx)
NS_LOG_LOGIC("Net device "<< nd<< " is not bridged")
void SetChannelAttribute(std::string name, const AttributeValue &value)
Set an attribute value to be propagated to each Channel created by the helper.
static void SetSeed(uint32_t seed)
Set the seed.
static void TraceNextTx(std::string &next_tx_seq_file_name)
void SetUnit(enum ErrorUnit error_unit)
Definition: error-model.cc:194
AttributeValue implementation for Address.
Definition: address.h:278
void Stop(Time stop)
Arrange for all of the Applications in this container to Stop() at the Time given as a parameter...
#define NS_ABORT_MSG_UNLESS(cond, msg)
Abnormal program termination if a condition is false, with a message.
Definition: abort.h:144
static void Stop(void)
Tell the Simulator the calling event should be the last one executed.
Definition: simulator.cc:178
tracing
Definition: third.py:44
Time Seconds(double value)
Construct a Time in the indicated unit.
Definition: nstime.h:1064
void SetDefault(std::string name, const AttributeValue &value)
Definition: config.cc:812
interfaces
Definition: first.py:48
static bool firstCwnd
void SetRandomVariable(Ptr< RandomVariableStream >)
Definition: error-model.cc:215
static void NextTxTracer(SequenceNumber32 old, SequenceNumber32 nextTx)
static bool firstRtt
static bool firstRto
Ptr< Node > Get(uint32_t i) const
Get the Ptr<Node> stored in this container at a given index.
A helper class to make life easier while doing simple IPv4 address assignment in scripts.
static void TraceRtt(std::string rtt_tr_file_name)
void Create(uint32_t n)
Create n nodes and append pointers to them to the end of this NodeContainer.
devices
Definition: first.py:39
Determine which packets are errored corresponding to an underlying distribution, rate, and unit.
Definition: error-model.h:182
static void TraceInFlight(std::string &in_flight_file_name)
Use number of bytes for queue size.
Definition: queue-size.h:45
a unique identifier for an interface.
Definition: type-id.h:58
static void RtoTracer(Time oldval, Time newval)
static void TraceCwnd(std::string cwnd_tr_file_name)
static void SsThreshTracer(uint32_t oldval, uint32_t newval)
std::ostream * GetStream(void)
Return a pointer to an ostream previously set in the wrapper.
static Ptr< OutputStreamWrapper > ssThreshStream
static TypeId LookupByName(std::string name)
Get a TypeId by name.
Definition: type-id.cc:829
static void TraceRto(std::string rto_tr_file_name)