tcp-option-test.cc

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/*
 * Copyright (c) 2014 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 "ns3/core-module.h"
#include "ns3/tcp-option-ts.h"
#include "ns3/tcp-option-winscale.h"
#include "ns3/tcp-option.h"
#include "ns3/test.h"
 
#include <string.h>
 
using namespace ns3;
 
class TcpOptionWSTestCase : public TestCase
{
  public:
    TcpOptionWSTestCase(std::string name, uint8_t scale);
 
    void TestSerialize();
    void TestDeserialize();
 
  private:
    void DoRun() override;
    void DoTeardown() override;
 
    uint8_t m_scale; 
    Buffer m_buffer; 
};
 
TcpOptionWSTestCase::TcpOptionWSTestCase(std::string name, uint8_t scale)
    : TestCase(name)
{
    m_scale = scale;
}
 
void
TcpOptionWSTestCase::DoRun()
{
    TestSerialize();
    TestDeserialize();
}
 
void
TcpOptionWSTestCase::TestSerialize()
{
    TcpOptionWinScale opt;
 
    opt.SetScale(m_scale);
    NS_TEST_EXPECT_MSG_EQ(m_scale, opt.GetScale(), "Scale isn't saved correctly");
 
    m_buffer.AddAtStart(opt.GetSerializedSize());
 
    opt.Serialize(m_buffer.Begin());
}
 
void
TcpOptionWSTestCase::TestDeserialize()
{
    TcpOptionWinScale opt;
 
    Buffer::Iterator start = m_buffer.Begin();
    uint8_t kind = start.PeekU8();
 
    NS_TEST_EXPECT_MSG_EQ(kind, TcpOption::WINSCALE, "Different kind found");
 
    opt.Deserialize(start);
 
    NS_TEST_EXPECT_MSG_EQ(m_scale, opt.GetScale(), "Different scale found");
}
 
void
TcpOptionWSTestCase::DoTeardown()
{
}
 
class TcpOptionTSTestCase : public TestCase
{
  public:
    TcpOptionTSTestCase(std::string name);
 
    void TestSerialize();
    void TestDeserialize();
 
  private:
    void DoRun() override;
    void DoTeardown() override;
 
    uint32_t m_timestamp; 
    uint32_t m_echo;      
    Buffer m_buffer;      
};
 
TcpOptionTSTestCase::TcpOptionTSTestCase(std::string name)
    : TestCase(name)
{
    m_timestamp = 0;
    m_echo = 0;
}
 
void
TcpOptionTSTestCase::DoRun()
{
    Ptr<UniformRandomVariable> x = CreateObject<UniformRandomVariable>();
 
    for (uint32_t i = 0; i < 1000; ++i)
    {
        m_timestamp = x->GetInteger();
        m_echo = x->GetInteger();
        TestSerialize();
        TestDeserialize();
    }
}
 
void
TcpOptionTSTestCase::TestSerialize()
{
    TcpOptionTS opt;
 
    opt.SetTimestamp(m_timestamp);
    opt.SetEcho(m_echo);
 
    NS_TEST_EXPECT_MSG_EQ(m_timestamp, opt.GetTimestamp(), "TS isn't saved correctly");
    NS_TEST_EXPECT_MSG_EQ(m_echo, opt.GetEcho(), "echo isn't saved correctly");
 
    m_buffer.AddAtStart(opt.GetSerializedSize());
 
    opt.Serialize(m_buffer.Begin());
}
 
void
TcpOptionTSTestCase::TestDeserialize()
{
    TcpOptionTS opt;
 
    Buffer::Iterator start = m_buffer.Begin();
    uint8_t kind = start.PeekU8();
 
    NS_TEST_EXPECT_MSG_EQ(kind, TcpOption::TS, "Different kind found");
 
    opt.Deserialize(start);
 
    NS_TEST_EXPECT_MSG_EQ(m_timestamp, opt.GetTimestamp(), "Different TS found");
    NS_TEST_EXPECT_MSG_EQ(m_echo, opt.GetEcho(), "Different echo found");
}
 
void
TcpOptionTSTestCase::DoTeardown()
{
}
 
class TcpOptionTestSuite : public TestSuite
{
  public:
    TcpOptionTestSuite()
        : TestSuite("tcp-option", UNIT)
    {
        for (uint8_t i = 0; i < 15; ++i)
        {
            AddTestCase(new TcpOptionWSTestCase("Testing window scale value", i), TestCase::QUICK);
        }
        AddTestCase(new TcpOptionTSTestCase("Testing serialization of random values for timestamp"),
                    TestCase::QUICK);
    }
};
 
static TcpOptionTestSuite g_TcpOptionTestSuite;