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

/*

 * Copyright (c) 2009 IITP RAS

 *

 * 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

 *

 * Authors: Kirill Andreev  <andreev@iitp.ru>

 */

#include "ns3/mesh-helper.h"

#include "ns3/simulator.h"

#include "ns3/random-variable.h"

#include "ns3/mobility-helper.h"

#include "ns3/double.h"

#include "ns3/uinteger.h"

#include "ns3/string.h"

#include "ns3/yans-wifi-helper.h"

#include "ns3/internet-stack-helper.h"

#include "ns3/ipv4-address-helper.h"

#include "ns3/abort.h"

#include "ns3/udp-echo-helper.h"

#include "ns3/mobility-model.h"

#include <sstream>

#include "hwmp-target-flags-regression.h"

using namespace ns3;

/// Set to true to rewrite reference traces, leave false to run regression test

const bool WRITE_VECTORS = false;

/// Unique PCAP file name prefix

const char * const PREFIX = "hwmp-target-flags-regression-test";

  m_nodes (0),

  m_time (Seconds (5))

{

}

HwmpDoRfRegressionTest::~HwmpDoRfRegressionTest ()

{

  delete m_nodes;

}

bool

HwmpDoRfRegressionTest::DoRun ()

{

  SeedManager::SetSeed(12345);

  CreateNodes ();

  CreateDevices ();

  InstallApplications ();

  Simulator::Stop (m_time);

  Simulator::Run ();

  Simulator::Destroy ();

  if (!WRITE_VECTORS) CheckResults ();

  delete m_nodes, m_nodes = 0;

  return false;

}

void

HwmpDoRfRegressionTest::CreateNodes ()

{

  m_nodes = new NodeContainer;

  m_nodes->Create (4);

  MobilityHelper mobility;

  mobility.SetPositionAllocator ("ns3::GridPositionAllocator",

                                "MinX", DoubleValue (0.0),

                                "MinY", DoubleValue (0.0),

                                "DeltaX", DoubleValue (100),

                                "DeltaY", DoubleValue (0),

                                "GridWidth", UintegerValue (4),

                                "LayoutType", StringValue ("RowFirst"));

  mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");

  mobility.Install (*m_nodes);

}

void

HwmpDoRfRegressionTest::InstallApplications ()

{

  UdpEchoServerHelper echoServer (9);

  ApplicationContainer serverApps = echoServer.Install (m_nodes->Get (0));

  serverApps.Start (Seconds (0.0));

  serverApps.Stop (m_time);

  UdpEchoClientHelper echoClient (m_interfaces.GetAddress (0), 9);

  echoClient.SetAttribute ("MaxPackets", UintegerValue (300));

  echoClient.SetAttribute ("Interval", TimeValue (Seconds(1.0)));

  echoClient.SetAttribute ("PacketSize", UintegerValue (100));

  //Install first client

  ApplicationContainer clientApps = echoClient.Install (m_nodes->Get (1));

  clientApps.Start (Seconds (2.2));

  clientApps.Stop (m_time);

  //Install second client

  clientApps = echoClient.Install (m_nodes->Get (2));

  clientApps.Start (Seconds (2.0));

  clientApps.Stop (m_time);

  //Install second server and attach client to it:

  UdpEchoServerHelper echoServer1 (10);

  serverApps = echoServer1.Install (m_nodes->Get (3));

  serverApps.Start (Seconds (0.0));

  serverApps.Stop (m_time);

  UdpEchoClientHelper echoClient1 (m_interfaces.GetAddress (3), 10);

  echoClient1.SetAttribute ("MaxPackets", UintegerValue (300));

  echoClient1.SetAttribute ("Interval", TimeValue (Seconds(1.0)));

  echoClient1.SetAttribute ("PacketSize", UintegerValue (100));

  clientApps = echoClient1.Install (m_nodes->Get (0));

  clientApps.Start (Seconds (2.4));

  clientApps.Stop (m_time);

}

void

HwmpDoRfRegressionTest::CreateDevices ()

{

  // 1. setup WiFi

  YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();

  YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default ();

  wifiPhy.SetChannel (wifiChannel.Create ());

  // 2. setup mesh

  MeshHelper mesh = MeshHelper::Default ();

  mesh.SetStackInstaller ("ns3::Dot11sStack");

  mesh.SetMacType ("RandomStart", TimeValue (Seconds(0.1)));

  mesh.SetNumberOfInterfaces (1);

  NetDeviceContainer meshDevices = mesh.Install (wifiPhy, *m_nodes);  

  // 3. setup TCP/IP

  InternetStackHelper internetStack;

  internetStack.Install (*m_nodes);

  Ipv4AddressHelper address;

  address.SetBase ("10.1.1.0", "255.255.255.0");

  m_interfaces = address.Assign (meshDevices);

  // 4. write PCAP if needed

  std::string prefix = (WRITE_VECTORS ? NS_TEST_SOURCEDIR : std::string(GetTempDir ())) + PREFIX;

  wifiPhy.EnablePcapAll (prefix);

}

void

HwmpDoRfRegressionTest::CheckResults ()

{

  for (int i = 0; i < 4; ++i)

    {

      std::ostringstream os1, os2;

      // File naming conventions are hard-coded here.

      os1 << NS_TEST_SOURCEDIR << PREFIX << "-" << i << "-1.pcap";

      os2 << GetTempDir () << PREFIX << "-" << i << "-1.pcap";

      uint32_t sec(0), usec(0);

      bool diff = PcapFile::Diff (os1.str(), os2.str(), sec, usec); // TODO support default PcapWriter snap length here

      NS_TEST_EXPECT_MSG_EQ (diff, false, "PCAP traces " << os1.str() << " and " << os2.str() 

                                       << " differ starting from " << sec << " s " << usec << " us");

    }

}