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

/*

 *  Copyright (c) 2007,2008, 2009 INRIA, UDcast

 *

 * 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: Mohamed Amine Ismail <amine.ismail@sophia.inria.fr>

 *                              <amine.ismail@udcast.com>

 */

//

// Default network topology includes a base station (BS) and some number of

// subscriber station (SS) specified by the variable nbSS (defaults to six).

// The SSs are grouped into two groups: senders and receivers. SSs from 0 to

// nbSS/2 are designed as senders and SSs from (nbSS/2 + 1) to nbSS-1 will

// designed as receivers.

// Each SS creates 3 transport connection with the BS. the fist one has as QoS

// scheduling type UGS, the second one rtPS and the third one BE.

// Senders SSs send some stamped IP packets with variable bitrate to receiver SSs

// through the BS station. receiver SSs receive the IP packets analyze them and

// based on a sequnece number decide if all the packets are coorectly received

//      +-----+    +-----+    +-----+

//      | SS0 |    | SS1 |    | SS2 |

//      +-----+    +-----+    +-----+

//     10.1.1.1   10.1.1.2   10.1.1.3

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

//        ((*))    ((*))       ((*))

//

//                  10.1.1.7

//               +------------+

//               |Base Station| ==((*))

//               +------------+

//

//        ((*))    ((*))       ((*))

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

//      10.1.1.4   10.1.1.5   10.1.1.6

//       +-----+    +-----+    +-----+

//       | SS3 |    | SS4 |    | SS5 |

//       +-----+    +-----+    +-----+

#include "ns3/core-module.h"

#include "ns3/network-module.h"

#include "ns3/applications-module.h"

#include "ns3/mobility-module.h"

#include "ns3/config-store-module.h"

#include "ns3/wimax-module.h"

#include "ns3/internet-module.h"

#include "ns3/global-route-manager.h"

#include <iostream>

int main (int argc, char *argv[])

{

  // default values

  int nbSS = 4, duration = 7, schedType = 0;

  bool verbose = false;

  WimaxHelper::SchedulerType scheduler = WimaxHelper::SCHED_TYPE_SIMPLE;

  LogComponentEnable ("UdpClient", LOG_LEVEL_INFO);

  LogComponentEnable ("UdpServer", LOG_LEVEL_INFO);

  CommandLine cmd;

  cmd.AddValue ("nbSS", "number of subscriber station to create", nbSS);

  cmd.AddValue ("scheduler", "type of scheduler to use with the network devices", schedType);

  cmd.AddValue ("duration", "duration of the simulation in seconds", duration);

  cmd.AddValue ("verbose", "turn on all WimaxNetDevice log components", verbose);

  cmd.Parse (argc, argv);

  switch (schedType)

    {

    case 0:

      scheduler = WimaxHelper::SCHED_TYPE_SIMPLE;

      break;

    case 1:

      scheduler = WimaxHelper::SCHED_TYPE_MBQOS;

      break;

    case 2:

      scheduler = WimaxHelper::SCHED_TYPE_RTPS;

      break;

    default:

      scheduler = WimaxHelper::SCHED_TYPE_SIMPLE;

    }

  NodeContainer ssNodes;

  NodeContainer bsNodes;

  ssNodes.Create (nbSS);

  bsNodes.Create (1);

  WimaxHelper wimax;

  NetDeviceContainer ssDevs, bsDevs;

  ssDevs = wimax.Install (ssNodes,

                          WimaxHelper::DEVICE_TYPE_SUBSCRIBER_STATION,

                          WimaxHelper::SIMPLE_PHY_TYPE_OFDM,

                          scheduler);

  bsDevs = wimax.Install (bsNodes, WimaxHelper::DEVICE_TYPE_BASE_STATION, WimaxHelper::SIMPLE_PHY_TYPE_OFDM, scheduler);

  Ptr<SubscriberStationNetDevice>* ss = new Ptr<SubscriberStationNetDevice>[nbSS];

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

    {

      ss[i] = ssDevs.Get (i)->GetObject<SubscriberStationNetDevice> ();

      ss[i]->SetModulationType (WimaxPhy::MODULATION_TYPE_QAM16_12);

    }

  Ptr<BaseStationNetDevice> bs;

  bs = bsDevs.Get (0)->GetObject<BaseStationNetDevice> ();

  MobilityHelper mobility;

  mobility.Install (bsNodes);

  mobility.Install (ssNodes);

  InternetStackHelper stack;

  stack.Install (bsNodes);

  stack.Install (ssNodes);

  Ipv4AddressHelper address;

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

  Ipv4InterfaceContainer SSinterfaces = address.Assign (ssDevs);

  Ipv4InterfaceContainer BSinterface = address.Assign (bsDevs);

  if (verbose)

    {

      wimax.EnableLogComponents ();  // Turn on all wimax logging

    }

  /*------------------------------*/

  UdpServerHelper* udpServer = new UdpServerHelper[nbSS / 2];

  ApplicationContainer* serverApps = new ApplicationContainer[nbSS / 2];

  UdpClientHelper* udpClient = new UdpClientHelper[nbSS / 2];

  ApplicationContainer* clientApps = new ApplicationContainer[nbSS / 2];

  for (int i = 0; i < nbSS / 2; i++)

    {

      // set server port to 100+(i*10)

      udpServer[i] = UdpServerHelper (100 + (i * 10));

      serverApps[i] = udpServer[i].Install (ssNodes.Get (i));

      serverApps[i].Start (Seconds (6));

      serverApps[i].Stop (Seconds (duration));

      udpClient[i] = UdpClientHelper (SSinterfaces.GetAddress (i), 100 + (i * 10));

      udpClient[i].SetAttribute ("MaxPackets", UintegerValue (1200));

      udpClient[i].SetAttribute ("Interval", TimeValue (Seconds (0.12)));

      udpClient[i].SetAttribute ("PacketSize", UintegerValue (800));

      clientApps[i] = udpClient[i].Install (ssNodes.Get (i + (nbSS / 2)));

      clientApps[i].Start (Seconds (6));

      clientApps[i].Stop (Seconds (duration));

    }

  Simulator::Stop (Seconds (duration + 0.1));

  /*

   * Setup 1 transport connections between each SS and the BS

   */

  for (int i = 0; i < nbSS / 2; i++)

    {

      IpcsClassifierRecord DlClassifierBe (Ipv4Address ("0.0.0.0"),

                                           Ipv4Mask ("0.0.0.0"),

                                           SSinterfaces.GetAddress (i),

                                           Ipv4Mask ("255.255.255.255"),

                                           0,

                                           65000,

                                           100 + (i * 10),

                                           100 + (i * 10),

                                           17,

                                           1);

      ServiceFlow DlServiceFlowBe = wimax.CreateServiceFlow (ServiceFlow::SF_DIRECTION_DOWN,

                                                             ServiceFlow::SF_TYPE_BE,

                                                             DlClassifierBe);

      ss[i]->AddServiceFlow (DlServiceFlowBe);

      IpcsClassifierRecord ulClassifierBe (SSinterfaces.GetAddress (i + (nbSS / 2)),

                                           Ipv4Mask ("255.255.255.255"),

                                           Ipv4Address ("0.0.0.0"),

                                           Ipv4Mask ("0.0.0.0"),

                                           0,

                                           65000,

                                           100 + (i * 10),

                                           100 + (i * 10),

                                           17,

                                           1);

      ServiceFlow ulServiceFlowBe = wimax.CreateServiceFlow (ServiceFlow::SF_DIRECTION_UP,

                                                             ServiceFlow::SF_TYPE_BE,

                                                             ulClassifierBe);

      ss[i + (nbSS / 2)]->AddServiceFlow (ulServiceFlowBe);

    }

  NS_LOG_INFO ("Starting simulation.....");

  Simulator::Run ();

  delete[] clientApps;

  delete[] udpClient;

  delete[] serverApps;

  delete[] udpServer;

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

    {

      ss[i] = 0;

    }

  delete[] ss;

  bs = 0;

  Simulator::Destroy ();

  NS_LOG_INFO ("Done.");

  return 0;

}