A Discrete-Event Network Simulator
API
tcp-cong-avoid-test.cc
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1 /* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2015 Natale Patriciello <natale.patriciello@gmail.com>
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  */
19 #include "ns3/log.h"
20 #include "ns3/simple-channel.h"
21 #include "ns3/tcp-westwood.h"
22 #include "ns3/config.h"
23 #include "ns3/test.h"
24 #include "tcp-general-test.h"
25 
26 using namespace ns3;
27 
28 NS_LOG_COMPONENT_DEFINE ("TcpNewRenoCongAvoidTest");
29 
56 class
58 {
59 public:
69  uint32_t packets, TypeId& congControl,
70  const std::string &desc);
71 protected:
72  virtual void CWndTrace (uint32_t oldValue, uint32_t newValue);
73  virtual void QueueDrop (SocketWho who);
74  virtual void PhyDrop (SocketWho who);
75  virtual void NormalClose (SocketWho who);
80  void Check ();
81 
82  virtual void ConfigureEnvironment ();
83  virtual void ConfigureProperties ();
84 
85 private:
86  uint32_t m_segmentSize;
87  uint32_t m_packetSize;
88  uint32_t m_packets;
89  uint32_t m_increment;
91  bool m_initial;
92 };
93 
94 
96  uint32_t packetSize,
97  uint32_t packets,
98  TypeId &typeId,
99  const std::string &desc)
100  : TcpGeneralTest (desc),
101  m_segmentSize (segmentSize),
102  m_packetSize (packetSize),
103  m_packets (packets),
104  m_increment (0),
105  m_initial (true)
106 {
107  m_congControlTypeId = typeId;
108 }
109 
110 void
112 {
113  TcpGeneralTest::ConfigureEnvironment ();
116  SetMTU (1500);
117 }
118 
120 {
121  TcpGeneralTest::ConfigureProperties ();
124 }
125 
126 void
127 TcpNewRenoCongAvoidNormalTest::CWndTrace (uint32_t oldValue, uint32_t newValue)
128 {
129  if (m_initial)
130  {
131  m_initial = false;
132  return;
133  }
134 
135  if (!m_event.IsRunning ())
136  {
137  m_event = Simulator::Schedule (Seconds (1.0),
139  }
140 
141  m_increment += newValue - oldValue;
142 }
143 
144 void
146 {
147  NS_FATAL_ERROR ("Drop on the queue; cannot validate congestion avoidance");
148 }
149 
150 void
152 {
153  NS_FATAL_ERROR ("Drop on the phy: cannot validate congestion avoidance");
154 }
155 
156 void
158 {
159  uint32_t segSize = GetSegSize (TcpGeneralTest::SENDER);
160 
161  if (m_increment != 0)
162  {
164  "Increment exceeded segment size in one RTT");
165  }
166 
167  m_increment = 0;
168 
169  m_event = Simulator::Schedule (Seconds (1.0),
171 
172 }
173 
174 void
176 {
177  if (who == SENDER)
178  {
179  m_event.Cancel ();
180  }
181 }
182 
183 
184 
192 {
193 public:
194  TcpRenoCongAvoidTestSuite () : TestSuite ("tcp-cong-avoid-test", UNIT)
195  {
196  std::list<TypeId> types;
197  types.insert (types.begin (), TcpWestwood::GetTypeId ());
198  types.insert (types.begin (), TcpNewReno::GetTypeId ());
199 
200  for (std::list<TypeId>::iterator it = types.begin (); it != types.end (); ++it)
201  {
202  for (uint32_t i = 10; i <= 50; i += 10)
203  {
204  AddTestCase (new TcpNewRenoCongAvoidNormalTest (500, 500, i, (*it),
205  "cong avoid MSS=500, pkt_size=500," + (*it).GetName ()),
206  TestCase::QUICK);
207  AddTestCase (new TcpNewRenoCongAvoidNormalTest (500, 1000, i, (*it),
208  "cong avoid MSS=500, pkt_size=1000," + (*it).GetName ()),
209  TestCase::QUICK);
210  }
211  }
212  }
213 };
214 
void SetSegmentSize(SocketWho who, uint32_t segmentSize)
Forcefully set the segment size.
static const uint32_t packetSize
A suite of tests to run.
Definition: test.h:1343
uint32_t segmentSize
virtual void QueueDrop(SocketWho who)
Drop on the queue.
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:205
void SetAppPktSize(uint32_t pktSize)
Set app packet size.
#define NS_FATAL_ERROR(msg)
Report a fatal error with a message and terminate.
Definition: fatal-error.h:165
TestSuite for the behavior of RFC congestion avoidance.
void AddTestCase(TestCase *testCase, TestDuration duration=QUICK)
Add an individual child TestCase to this test suite.
Definition: test.cc:299
void SetMTU(uint32_t mtu)
MTU of the bottleneck link.
Test the behavior of RFC congestion avoidance.
virtual void NormalClose(SocketWho who)
Socket closed normally.
void SetInitialSsThresh(SocketWho who, uint32_t initialSsThresh)
Forcefully set the initial ssthresh.
virtual void ConfigureEnvironment()
Change the configuration of the environment.
uint32_t m_segmentSize
Segment size.
Every class exported by the ns3 library is enclosed in the ns3 namespace.
uint32_t m_packetSize
Size of the packets.
void Check()
Called each RTT (1.0 sec in the testing environment) and check that the overall increment in this RTT...
uint32_t GetSegSize(SocketWho who)
Get the segment size of the node specified.
TcpNewRenoCongAvoidNormalTest(uint32_t segmentSize, uint32_t packetSize, uint32_t packets, TypeId &congControl, const std::string &desc)
Constructor.
void SetAppPktCount(uint32_t pktCount)
Set app packet count.
virtual void CWndTrace(uint32_t oldValue, uint32_t newValue)
Tracks the congestion window changes.
bool m_initial
True on first run.
SocketWho
Used as parameter of methods, specifies on what node the caller is interested (e.g.
General infrastructure for TCP testing.
An identifier for simulation events.
Definition: event-id.h:53
virtual void ConfigureProperties()
Change the configuration of the socket properties.
static TcpRenoCongAvoidTestSuite g_tcpCongAvoidNormalTest
Static variable for test initialization.
Time Seconds(double value)
Construct a Time in the indicated unit.
Definition: nstime.h:1288
bool IsRunning(void) const
This method is syntactic sugar for !IsExpired().
Definition: event-id.cc:71
void Cancel(void)
This method is syntactic sugar for the ns3::Simulator::Cancel method.
Definition: event-id.cc:53
virtual void PhyDrop(SocketWho who)
Link drop.
#define NS_TEST_ASSERT_MSG_LT_OR_EQ(actual, limit, msg)
Test that an actual value is less than or equal to a limit and report and abort if not...
Definition: test.h:830
This test suite implements a Unit Test.
Definition: test.h:1353
a unique identifier for an interface.
Definition: type-id.h:58
uint32_t m_increment
Congestion window increment.
uint32_t m_packets
Number of packets.
TypeId m_congControlTypeId
Congestion control.