tcp-cong-avoid-test.cc

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/*
 * Copyright (c) 2015 Natale Patriciello <natale.patriciello@gmail.com>
 *
 * 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
 *
 */
#include "tcp-general-test.h"
 
#include "ns3/config.h"
#include "ns3/log.h"
#include "ns3/simple-channel.h"
#include "ns3/test.h"
 
using namespace ns3;
 
NS_LOG_COMPONENT_DEFINE("TcpNewRenoCongAvoidTest");
 
class TcpNewRenoCongAvoidNormalTest : public TcpGeneralTest
{
  public:
    TcpNewRenoCongAvoidNormalTest(uint32_t segmentSize,
                                  uint32_t packetSize,
                                  uint32_t packets,
                                  const TypeId& congControl,
                                  const std::string& desc);
 
  protected:
    void CWndTrace(uint32_t oldValue, uint32_t newValue) override;
    void QueueDrop(SocketWho who) override;
    void PhyDrop(SocketWho who) override;
    void NormalClose(SocketWho who) override;
    void Check();
 
    void ConfigureEnvironment() override;
    void ConfigureProperties() override;
 
  private:
    uint32_t m_segmentSize; 
    uint32_t m_packetSize;  
    uint32_t m_packets;     
    uint32_t m_increment;   
    EventId m_event;        
    bool m_initial;         
};
 
TcpNewRenoCongAvoidNormalTest::TcpNewRenoCongAvoidNormalTest(uint32_t segmentSize,
                                                             uint32_t packetSize,
                                                             uint32_t packets,
                                                             const TypeId& typeId,
                                                             const std::string& desc)
    : TcpGeneralTest(desc),
      m_segmentSize(segmentSize),
      m_packetSize(packetSize),
      m_packets(packets),
      m_increment(0),
      m_initial(true)
{
    m_congControlTypeId = typeId;
}
 
void
TcpNewRenoCongAvoidNormalTest::ConfigureEnvironment()
{
    TcpGeneralTest::ConfigureEnvironment();
    SetAppPktSize(m_packetSize);
    SetAppPktCount(m_packets);
    SetMTU(1500);
}
 
void
TcpNewRenoCongAvoidNormalTest::ConfigureProperties()
{
    TcpGeneralTest::ConfigureProperties();
    SetSegmentSize(SENDER, m_segmentSize);
    SetInitialSsThresh(SENDER, 0);
}
 
void
TcpNewRenoCongAvoidNormalTest::CWndTrace(uint32_t oldValue, uint32_t newValue)
{
    if (m_initial)
    {
        m_initial = false;
        return;
    }
 
    if (!m_event.IsRunning())
    {
        m_event = Simulator::Schedule(Seconds(1.0), &TcpNewRenoCongAvoidNormalTest::Check, this);
    }
 
    m_increment += newValue - oldValue;
}
 
void
TcpNewRenoCongAvoidNormalTest::QueueDrop(SocketWho who)
{
    NS_FATAL_ERROR("Drop on the queue; cannot validate congestion avoidance");
}
 
void
TcpNewRenoCongAvoidNormalTest::PhyDrop(SocketWho who)
{
    NS_FATAL_ERROR("Drop on the phy: cannot validate congestion avoidance");
}
 
void
TcpNewRenoCongAvoidNormalTest::Check()
{
    uint32_t segSize = GetSegSize(TcpGeneralTest::SENDER);
 
    if (m_increment != 0)
    {
        NS_TEST_ASSERT_MSG_LT_OR_EQ(m_increment,
                                    segSize,
                                    "Increment exceeded segment size in one RTT");
    }
 
    m_increment = 0;
 
    m_event = Simulator::Schedule(Seconds(1.0), &TcpNewRenoCongAvoidNormalTest::Check, this);
}
 
void
TcpNewRenoCongAvoidNormalTest::NormalClose(SocketWho who)
{
    if (who == SENDER)
    {
        m_event.Cancel();
    }
}
 
class TcpRenoCongAvoidTestSuite : public TestSuite
{
  public:
    TcpRenoCongAvoidTestSuite()
        : TestSuite("tcp-cong-avoid-test", UNIT)
    {
        std::list<TypeId> types = {
            TcpNewReno::GetTypeId(),
        };
 
        for (const auto& t : types)
        {
            std::string typeName = t.GetName();
 
            for (uint32_t i = 10; i <= 50; i += 10)
            {
                AddTestCase(new TcpNewRenoCongAvoidNormalTest(500,
                                                              500,
                                                              i,
                                                              t,
                                                              "cong avoid MSS=500, pkt_size=500," +
                                                                  typeName),
                            TestCase::QUICK);
                AddTestCase(new TcpNewRenoCongAvoidNormalTest(500,
                                                              1000,
                                                              i,
                                                              t,
                                                              "cong avoid MSS=500, pkt_size=1000," +
                                                                  typeName),
                            TestCase::QUICK);
            }
        }
    }
};
 
static TcpRenoCongAvoidTestSuite
    g_tcpCongAvoidNormalTest;