/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2010 Hajime Tazaki

 * 

 * 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

 *

 * Author: John Abraham <john.abraham@gatech.edu>

 * Adapted from: ipv4-raw-test.cc

 */

#include "ns3/test.h"

#include "ns3/socket-factory.h"

#include "ns3/ipv4-raw-socket-factory.h"

#include "ns3/simulator.h"

#include "ns3/simple-channel.h"

#include "ns3/simple-net-device.h"

#include "ns3/drop-tail-queue.h"

#include "ns3/socket.h"

#include "ns3/log.h"

#include "ns3/node.h"

#include "ns3/inet-socket-address.h"

#include "ns3/boolean.h"

#include "ns3/arp-l3-protocol.h"

#include "ns3/ipv4-l3-protocol.h"

#include "ns3/icmpv4-l4-protocol.h"

#include "ns3/ipv4-list-routing.h"

#include "ns3/ipv4-static-routing.h"

#include <string>

#include <sstream>

#include <limits>

#include <netinet/in.h>

#include <sys/socket.h>

#include <sys/types.h>

using namespace ns3;

static void

AddInternetStack (Ptr<Node> node)

{

  //ARP

  Ptr<ArpL3Protocol> arp = CreateObject<ArpL3Protocol> ();

  node->AggregateObject (arp);

  //IPV4

  Ptr<Ipv4L3Protocol> ipv4 = CreateObject<Ipv4L3Protocol> ();

  //Routing for Ipv4

  Ptr<Ipv4ListRouting> ipv4Routing = CreateObject<Ipv4ListRouting> ();

  ipv4->SetRoutingProtocol (ipv4Routing);

  Ptr<Ipv4StaticRouting> ipv4staticRouting = CreateObject<Ipv4StaticRouting> ();

  ipv4Routing->AddRoutingProtocol (ipv4staticRouting, 0);

  node->AggregateObject (ipv4);

  //ICMP

  Ptr<Icmpv4L4Protocol> icmp = CreateObject<Icmpv4L4Protocol> ();

  node->AggregateObject (icmp);

  // //Ipv4Raw

  // Ptr<Ipv4UdpL4Protocol> udp = CreateObject<UdpL4Protocol> ();

  // node->AggregateObject(udp); 

}

class Ipv4HeaderTest : public TestCase

{

  Ptr<Packet> m_receivedPacket;

  Ipv4Header m_receivedHeader;

  void DoSendData_IpHdr_Dscp (Ptr<Socket> socket, std::string to, Ipv4Header::DscpType dscp,Ipv4Header::EcnType);

  void SendData_IpHdr_Dscp (Ptr<Socket> socket, std::string to, Ipv4Header::DscpType dscp, Ipv4Header::EcnType);

public:

  virtual void DoRun (void);

  Ipv4HeaderTest ();

  void ReceivePacket (Ptr<Socket> socket, Ptr<Packet> packet, const Address &from);

  void ReceivePkt (Ptr<Socket> socket);

};

Ipv4HeaderTest::Ipv4HeaderTest ()

  : TestCase ("IPv4 Header Test") 

{

}

void Ipv4HeaderTest::ReceivePacket (Ptr<Socket> socket, Ptr<Packet> packet, const Address &from)

{

  m_receivedPacket = packet;

}

void Ipv4HeaderTest::ReceivePkt (Ptr<Socket> socket)

{

  uint32_t availableData;

  availableData = socket->GetRxAvailable ();

  m_receivedPacket = socket->Recv (2, MSG_PEEK);

  NS_ASSERT (m_receivedPacket->GetSize () == 2);

  m_receivedPacket = socket->Recv (std::numeric_limits<uint32_t>::max (), 0);

  NS_ASSERT (availableData == m_receivedPacket->GetSize ());

  m_receivedPacket->PeekHeader (m_receivedHeader);

}

void

Ipv4HeaderTest::DoSendData_IpHdr_Dscp (Ptr<Socket> socket, std::string to, Ipv4Header::DscpType dscp, Ipv4Header::EcnType ecn)

{

  Address realTo = InetSocketAddress (Ipv4Address (to.c_str ()), 0);

  socket->SetAttribute ("IpHeaderInclude", BooleanValue (true));

  Ptr<Packet> p = Create<Packet> (123);

  Ipv4Header ipHeader;

  ipHeader.SetSource (Ipv4Address ("10.0.0.2"));

  ipHeader.SetDestination (Ipv4Address (to.c_str ()));

  ipHeader.SetProtocol (0);

  ipHeader.SetPayloadSize (p->GetSize ());

  ipHeader.SetTtl (255);

  ipHeader.SetDscp (dscp);

  ipHeader.SetEcn (ecn);

  p->AddHeader (ipHeader);

  NS_TEST_EXPECT_MSG_EQ (socket->SendTo (p, 0, realTo),

                         143, to);

  socket->SetAttribute ("IpHeaderInclude", BooleanValue (false));

}

void

Ipv4HeaderTest::SendData_IpHdr_Dscp (Ptr<Socket> socket, std::string to, Ipv4Header::DscpType dscp, Ipv4Header::EcnType ecn)

{

  m_receivedPacket = Create<Packet> ();

  Simulator::ScheduleWithContext (socket->GetNode ()->GetId (), Seconds (0),

                                  &Ipv4HeaderTest::DoSendData_IpHdr_Dscp, this, socket, to, dscp, ecn);

  Simulator::Run ();

}

void

Ipv4HeaderTest::DoRun (void)

{

  // Create topology

  // Receiver Node

  Ptr<Node> rxNode = CreateObject<Node> ();

  AddInternetStack (rxNode);

  Ptr<SimpleNetDevice> rxDev1, rxDev2;

  { // first interface

    rxDev1 = CreateObject<SimpleNetDevice> ();

    rxDev1->SetAddress (Mac48Address::ConvertFrom (Mac48Address::Allocate ()));

    rxNode->AddDevice (rxDev1);

    Ptr<Ipv4> ipv4 = rxNode->GetObject<Ipv4> ();

    uint32_t netdev_idx = ipv4->AddInterface (rxDev1);

    Ipv4InterfaceAddress ipv4Addr = Ipv4InterfaceAddress (Ipv4Address ("10.0.0.1"), Ipv4Mask (0xffff0000U));

    ipv4->AddAddress (netdev_idx, ipv4Addr);

    ipv4->SetUp (netdev_idx);

  }

  // Sender Node

  Ptr<Node> txNode = CreateObject<Node> ();

  AddInternetStack (txNode);

  Ptr<SimpleNetDevice> txDev1;

  {

    txDev1 = CreateObject<SimpleNetDevice> ();

    txDev1->SetAddress (Mac48Address::ConvertFrom (Mac48Address::Allocate ()));

    txNode->AddDevice (txDev1);

    Ptr<Ipv4> ipv4 = txNode->GetObject<Ipv4> ();

    uint32_t netdev_idx = ipv4->AddInterface (txDev1);

    Ipv4InterfaceAddress ipv4Addr = Ipv4InterfaceAddress (Ipv4Address ("10.0.0.2"), Ipv4Mask (0xffff0000U));

    ipv4->AddAddress (netdev_idx, ipv4Addr);

    ipv4->SetUp (netdev_idx);

  }

  // link the two nodes

  Ptr<SimpleChannel> channel1 = CreateObject<SimpleChannel> ();

  rxDev1->SetChannel (channel1);

  txDev1->SetChannel (channel1);

  // Create the IPv4 Raw sockets

  Ptr<SocketFactory> rxSocketFactory = rxNode->GetObject<Ipv4RawSocketFactory> ();

  Ptr<Socket> rxSocket = rxSocketFactory->CreateSocket ();

  NS_TEST_EXPECT_MSG_EQ (rxSocket->Bind (InetSocketAddress (Ipv4Address ("0.0.0.0"), 0)), 0, "trivial");

  rxSocket->SetRecvCallback (MakeCallback (&Ipv4HeaderTest::ReceivePkt, this));

  Ptr<SocketFactory> txSocketFactory = txNode->GetObject<Ipv4RawSocketFactory> ();

  Ptr<Socket> txSocket = txSocketFactory->CreateSocket ();

  // ------ Now the tests ------------

  // Dscp Tests

  std::cout << "Dscp Test\n";

  std::vector <Ipv4Header::DscpType> vDscpTypes;

  vDscpTypes.push_back (Ipv4Header::DscpDefault);

  vDscpTypes.push_back (Ipv4Header::DSCP_CS1);

  vDscpTypes.push_back (Ipv4Header::DSCP_AF11);

  vDscpTypes.push_back (Ipv4Header::DSCP_AF12);

  vDscpTypes.push_back (Ipv4Header::DSCP_AF13);

  vDscpTypes.push_back (Ipv4Header::DSCP_CS2);

  vDscpTypes.push_back (Ipv4Header::DSCP_AF21);

  vDscpTypes.push_back (Ipv4Header::DSCP_AF22);

  vDscpTypes.push_back (Ipv4Header::DSCP_AF23);

  vDscpTypes.push_back (Ipv4Header::DSCP_CS3);

  vDscpTypes.push_back (Ipv4Header::DSCP_AF31);

  vDscpTypes.push_back (Ipv4Header::DSCP_AF32);

  vDscpTypes.push_back (Ipv4Header::DSCP_AF33);

  vDscpTypes.push_back (Ipv4Header::DSCP_CS4);

  vDscpTypes.push_back (Ipv4Header::DSCP_AF41);

  vDscpTypes.push_back (Ipv4Header::DSCP_AF42);

  vDscpTypes.push_back (Ipv4Header::DSCP_AF43);

  vDscpTypes.push_back (Ipv4Header::DSCP_CS5);

  vDscpTypes.push_back (Ipv4Header::DSCP_EF);

  vDscpTypes.push_back (Ipv4Header::DSCP_CS6);

  vDscpTypes.push_back (Ipv4Header::DSCP_CS7);

  for (uint32_t i = 0; i < vDscpTypes.size (); i++)

    {

      SendData_IpHdr_Dscp (txSocket, "10.0.0.1", vDscpTypes [i], Ipv4Header::ECN_ECT1);

      NS_TEST_EXPECT_MSG_EQ (m_receivedPacket->GetSize (), 143, "recv(hdrincl): 10.0.0.1");

      NS_TEST_EXPECT_MSG_EQ (m_receivedHeader.GetDscp (), vDscpTypes [i], "recv(hdrincl): 10.0.0.1");

      m_receivedHeader.Print (std::cout);

      std::cout << std::endl;

      m_receivedPacket->RemoveAllByteTags ();

      m_receivedPacket = 0;

    }

  // Ecn tests

  std::cout << "Ecn Test\n";

  std::vector <Ipv4Header::EcnType> vEcnTypes;

  vEcnTypes.push_back (Ipv4Header::ECN_NotECT);

  vEcnTypes.push_back (Ipv4Header::ECN_ECT1);

  vEcnTypes.push_back (Ipv4Header::ECN_ECT0);

  vEcnTypes.push_back (Ipv4Header::ECN_CE);

  for (uint32_t i = 0; i < vEcnTypes.size (); i++)

    {

      SendData_IpHdr_Dscp (txSocket, "10.0.0.1", Ipv4Header::DscpDefault, vEcnTypes [i]);

      NS_TEST_EXPECT_MSG_EQ (m_receivedPacket->GetSize (), 143, "recv(hdrincl): 10.0.0.1");

      NS_TEST_EXPECT_MSG_EQ (m_receivedHeader.GetEcn (), vEcnTypes [i], "recv(hdrincl): 10.0.0.1");

      m_receivedHeader.Print (std::cout);

      std::cout << std::endl;

      m_receivedPacket->RemoveAllByteTags ();

      m_receivedPacket = 0;

    }

  Simulator::Destroy ();

}

//-----------------------------------------------------------------------------

class Ipv4HeaderTestSuite : public TestSuite

{

public:

  Ipv4HeaderTestSuite () : TestSuite ("ipv4-header", UNIT)

  {

    AddTestCase (new Ipv4HeaderTest, TestCase::QUICK);

  }

} g_ipv4HeaderTestSuite;