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

/*

 * Copyright (c) 2008 INRIA

 *

 * 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#include "ns3/trace-helper.h"

#include "yans-wifi-helper.h"

#include "ns3/error-rate-model.h"

#include "ns3/propagation-loss-model.h"

#include "ns3/propagation-delay-model.h"

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

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

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

#include "ns3/radiotap-header.h"

#include "ns3/pcap-file-wrapper.h"

#include "ns3/simulator.h"

#include "ns3/config.h"

#include "ns3/names.h"

#include "ns3/abort.h"

#include "ns3/log.h"

NS_LOG_COMPONENT_DEFINE ("YansWifiHelper");

namespace ns3 {

static void

AsciiPhyTransmitSinkWithContext (

  Ptr<OutputStreamWrapper> stream,

  std::string context,

  Ptr<const Packet> p,

  WifiMode mode,

  WifiPreamble preamble,

  uint8_t txLevel)

{

  NS_LOG_FUNCTION (stream << context << p << mode << preamble << txLevel);

  *stream->GetStream () << "t " << Simulator::Now ().GetSeconds () << " " << context << " " << *p << std::endl;

}

static void

AsciiPhyTransmitSinkWithoutContext (

  Ptr<OutputStreamWrapper> stream,

  Ptr<const Packet> p,

  WifiMode mode,

  WifiPreamble preamble,

  uint8_t txLevel)

{

  NS_LOG_FUNCTION (stream << p << mode << preamble << txLevel);

  *stream->GetStream () << "t " << Simulator::Now ().GetSeconds () << " " << *p << std::endl;

}

static void

AsciiPhyReceiveSinkWithContext (

  Ptr<OutputStreamWrapper> stream,

  std::string context,

  Ptr<const Packet> p,

  double snr,

  WifiMode mode,

  enum WifiPreamble preamble)

{

  NS_LOG_FUNCTION (stream << context << p << snr << mode << preamble);

  *stream->GetStream () << "r " << Simulator::Now ().GetSeconds () << " " << context << " " << *p << std::endl;

}

static void

AsciiPhyReceiveSinkWithoutContext (

  Ptr<OutputStreamWrapper> stream,

  Ptr<const Packet> p,

  double snr,

  WifiMode mode,

  enum WifiPreamble preamble)

{

  NS_LOG_FUNCTION (stream << p << snr << mode << preamble);

  *stream->GetStream () << "r " << Simulator::Now ().GetSeconds () << " " << *p << std::endl;

}

YansWifiChannelHelper::YansWifiChannelHelper ()

{

}

YansWifiChannelHelper

YansWifiChannelHelper::Default (void)

{

  YansWifiChannelHelper helper;

  helper.SetPropagationDelay ("ns3::ConstantSpeedPropagationDelayModel");

  helper.AddPropagationLoss ("ns3::LogDistancePropagationLossModel");

  return helper;

}

void

YansWifiChannelHelper::AddPropagationLoss (std::string type,

                                           std::string n0, const AttributeValue &v0,

                                           std::string n1, const AttributeValue &v1,

                                           std::string n2, const AttributeValue &v2,

                                           std::string n3, const AttributeValue &v3,

                                           std::string n4, const AttributeValue &v4,

                                           std::string n5, const AttributeValue &v5,

                                           std::string n6, const AttributeValue &v6,

                                           std::string n7, const AttributeValue &v7)

{

  ObjectFactory factory;

  factory.SetTypeId (type);

  factory.Set (n0, v0);

  factory.Set (n1, v1);

  factory.Set (n2, v2);

  factory.Set (n3, v3);

  factory.Set (n4, v4);

  factory.Set (n5, v5);

  factory.Set (n6, v6);

  factory.Set (n7, v7);

  m_propagationLoss.push_back (factory);

}

void

YansWifiChannelHelper::SetPropagationDelay (std::string type,

                                            std::string n0, const AttributeValue &v0,

                                            std::string n1, const AttributeValue &v1,

                                            std::string n2, const AttributeValue &v2,

                                            std::string n3, const AttributeValue &v3,

                                            std::string n4, const AttributeValue &v4,

                                            std::string n5, const AttributeValue &v5,

                                            std::string n6, const AttributeValue &v6,

                                            std::string n7, const AttributeValue &v7)

{

  ObjectFactory factory;

  factory.SetTypeId (type);

  factory.Set (n0, v0);

  factory.Set (n1, v1);

  factory.Set (n2, v2);

  factory.Set (n3, v3);

  factory.Set (n4, v4);

  factory.Set (n5, v5);

  factory.Set (n6, v6);

  factory.Set (n7, v7);

  m_propagationDelay = factory;

}

Ptr<YansWifiChannel>

YansWifiChannelHelper::Create (void) const

{

  Ptr<YansWifiChannel> channel = CreateObject<YansWifiChannel> ();

  Ptr<PropagationLossModel> prev = 0;

  for (std::vector<ObjectFactory>::const_iterator i = m_propagationLoss.begin (); i != m_propagationLoss.end (); ++i)

    {

      Ptr<PropagationLossModel> cur = (*i).Create<PropagationLossModel> ();

      if (prev != 0)

        {

          prev->SetNext (cur);

        }

      if (m_propagationLoss.begin () == i)

        {

          channel->SetPropagationLossModel (cur);

        }

      prev = cur;

    }

  Ptr<PropagationDelayModel> delay = m_propagationDelay.Create<PropagationDelayModel> ();

  channel->SetPropagationDelayModel (delay);

  return channel;

}

int64_t 

YansWifiChannelHelper::AssignStreams (Ptr<YansWifiChannel> c, int64_t stream)

{

  return c->AssignStreams (stream);

}

YansWifiPhyHelper::YansWifiPhyHelper ()

  : m_channel (0),

    m_pcapDlt (PcapHelper::DLT_IEEE802_11)

{

  m_phy.SetTypeId ("ns3::YansWifiPhy");

}

YansWifiPhyHelper

YansWifiPhyHelper::Default (void)

{

  YansWifiPhyHelper helper;

  helper.SetErrorRateModel ("ns3::NistErrorRateModel");

  return helper;

}

void

YansWifiPhyHelper::SetChannel (Ptr<YansWifiChannel> channel)

{

  m_channel = channel;

}

void

YansWifiPhyHelper::SetChannel (std::string channelName)

{

  Ptr<YansWifiChannel> channel = Names::Find<YansWifiChannel> (channelName);

  m_channel = channel;

}

void

YansWifiPhyHelper::Set (std::string name, const AttributeValue &v)

{

  m_phy.Set (name, v);

}

void

YansWifiPhyHelper::SetErrorRateModel (std::string name,

                                      std::string n0, const AttributeValue &v0,

                                      std::string n1, const AttributeValue &v1,

                                      std::string n2, const AttributeValue &v2,

                                      std::string n3, const AttributeValue &v3,

                                      std::string n4, const AttributeValue &v4,

                                      std::string n5, const AttributeValue &v5,

                                      std::string n6, const AttributeValue &v6,

                                      std::string n7, const AttributeValue &v7)

{

  m_errorRateModel = ObjectFactory ();

  m_errorRateModel.SetTypeId (name);

  m_errorRateModel.Set (n0, v0);

  m_errorRateModel.Set (n1, v1);

  m_errorRateModel.Set (n2, v2);

  m_errorRateModel.Set (n3, v3);

  m_errorRateModel.Set (n4, v4);

  m_errorRateModel.Set (n5, v5);

  m_errorRateModel.Set (n6, v6);

  m_errorRateModel.Set (n7, v7);

}

Ptr<WifiPhy>

YansWifiPhyHelper::Create (Ptr<Node> node, Ptr<WifiNetDevice> device) const

{

  Ptr<YansWifiPhy> phy = m_phy.Create<YansWifiPhy> ();

  Ptr<ErrorRateModel> error = m_errorRateModel.Create<ErrorRateModel> ();

  phy->SetErrorRateModel (error);

  phy->SetChannel (m_channel);

  phy->SetMobility (node);

  phy->SetDevice (device);

  return phy;

}

static void

PcapSniffTxEvent (

  Ptr<PcapFileWrapper> file,

  Ptr<const Packet>   packet,

  uint16_t            channelFreqMhz,

  uint16_t            channelNumber,

  uint32_t            rate,

{

  uint32_t dlt = file->GetDataLinkType ();

  switch (dlt)

    {

    case PcapHelper::DLT_IEEE802_11:

      file->Write (Simulator::Now (), packet);

      return;

    case PcapHelper::DLT_PRISM_HEADER:

      {

        NS_FATAL_ERROR ("PcapSniffTxEvent(): DLT_PRISM_HEADER not implemented");

        return;

      }

    case PcapHelper::DLT_IEEE802_11_RADIO:

      {

        Ptr<Packet> p = packet->Copy ();

        RadiotapHeader header;

        uint8_t frameFlags = RadiotapHeader::FRAME_FLAG_NONE;

        header.SetTsft (Simulator::Now ().GetMicroSeconds ());

        // Our capture includes the FCS, so we set the flag to say so.

        frameFlags |= RadiotapHeader::FRAME_FLAG_FCS_INCLUDED;

        if (isShortPreamble)

          {

            frameFlags |= RadiotapHeader::FRAME_FLAG_SHORT_PREAMBLE;

          }

        header.SetFrameFlags (frameFlags);

        header.SetRate (rate);

        uint16_t channelFlags = 0;

        switch (rate)

          {

          case 2:  // 1Mbps

          case 4:  // 2Mbps

          case 10: // 5Mbps

          case 22: // 11Mbps

            channelFlags |= RadiotapHeader::CHANNEL_FLAG_CCK;

            break;

          default:

            channelFlags |= RadiotapHeader::CHANNEL_FLAG_OFDM;

            break;

          }

        if (channelFreqMhz < 2500)

          {

            channelFlags |= RadiotapHeader::CHANNEL_FLAG_SPECTRUM_2GHZ;

          }

        else

          {

            channelFlags |= RadiotapHeader::CHANNEL_FLAG_SPECTRUM_5GHZ;

          }

        header.SetChannelFrequencyAndFlags (channelFreqMhz, channelFlags);

        p->AddHeader (header);

        file->Write (Simulator::Now (), p);

        return;

      }

    default:

      NS_ABORT_MSG ("PcapSniffTxEvent(): Unexpected data link type " << dlt);

    }

}

static void

PcapSniffRxEvent (

  Ptr<PcapFileWrapper> file,

  Ptr<const Packet> packet,

  uint16_t channelFreqMhz,

  uint16_t channelNumber,

  uint32_t rate,

  bool isShortPreamble,

  double signalDbm,

  double noiseDbm)

{

  uint32_t dlt = file->GetDataLinkType ();

  switch (dlt)

    {

    case PcapHelper::DLT_IEEE802_11:

      file->Write (Simulator::Now (), packet);

      return;

    case PcapHelper::DLT_PRISM_HEADER:

      {

        NS_FATAL_ERROR ("PcapSniffRxEvent(): DLT_PRISM_HEADER not implemented");

        return;

      }

    case PcapHelper::DLT_IEEE802_11_RADIO:

      {

        Ptr<Packet> p = packet->Copy ();

        RadiotapHeader header;

        uint8_t frameFlags = RadiotapHeader::FRAME_FLAG_NONE;

        header.SetTsft (Simulator::Now ().GetMicroSeconds ());

        // Our capture includes the FCS, so we set the flag to say so.

        frameFlags |= RadiotapHeader::FRAME_FLAG_FCS_INCLUDED;

        if (isShortPreamble)

          {

            frameFlags |= RadiotapHeader::FRAME_FLAG_SHORT_PREAMBLE;

          }

        header.SetFrameFlags (frameFlags);

        header.SetRate (rate);

        uint16_t channelFlags = 0;

        switch (rate)

          {

          case 2:  // 1Mbps

          case 4:  // 2Mbps

          case 10: // 5Mbps

          case 22: // 11Mbps

            channelFlags |= RadiotapHeader::CHANNEL_FLAG_CCK;

            break;

          default:

            channelFlags |= RadiotapHeader::CHANNEL_FLAG_OFDM;

            break;

          }

        if (channelFreqMhz < 2500)

          {

            channelFlags |= RadiotapHeader::CHANNEL_FLAG_SPECTRUM_2GHZ;

          }

        else

          {

            channelFlags |= RadiotapHeader::CHANNEL_FLAG_SPECTRUM_5GHZ;

          }

        header.SetChannelFrequencyAndFlags (channelFreqMhz, channelFlags);

        header.SetAntennaSignalPower (signalDbm);

        header.SetAntennaNoisePower (noiseDbm);

        p->AddHeader (header);

        file->Write (Simulator::Now (), p);

        return;

      }

    default:

      NS_ABORT_MSG ("PcapSniffRxEvent(): Unexpected data link type " << dlt);

    }

}

void

YansWifiPhyHelper::SetPcapDataLinkType (enum SupportedPcapDataLinkTypes dlt)

{

  switch (dlt)

    {

    case DLT_IEEE802_11:

      m_pcapDlt = PcapHelper::DLT_IEEE802_11;

      return;

    case DLT_PRISM_HEADER:

      m_pcapDlt = PcapHelper::DLT_PRISM_HEADER;

      return;

    case DLT_IEEE802_11_RADIO:

      m_pcapDlt = PcapHelper::DLT_IEEE802_11_RADIO;

      return;

    default:

      NS_ABORT_MSG ("YansWifiPhyHelper::SetPcapFormat(): Unexpected format");

    }

}

void

YansWifiPhyHelper::EnablePcapInternal (std::string prefix, Ptr<NetDevice> nd, bool promiscuous, bool explicitFilename)

{

  //

  // All of the Pcap enable functions vector through here including the ones

  // that are wandering through all of devices on perhaps all of the nodes in

  // the system.  We can only deal with devices of type WifiNetDevice.

  //

  Ptr<WifiNetDevice> device = nd->GetObject<WifiNetDevice> ();

  if (device == 0)

    {

      NS_LOG_INFO ("YansWifiHelper::EnablePcapInternal(): Device " << &device << " not of type ns3::WifiNetDevice");

      return;

    }

  Ptr<WifiPhy> phy = device->GetPhy ();

  NS_ABORT_MSG_IF (phy == 0, "YansWifiPhyHelper::EnablePcapInternal(): Phy layer in WifiNetDevice must be set");

  PcapHelper pcapHelper;

  std::string filename;

  if (explicitFilename)

    {

      filename = prefix;

    }

  else

    {

      filename = pcapHelper.GetFilenameFromDevice (prefix, device);

    }

  Ptr<PcapFileWrapper> file = pcapHelper.CreateFile (filename, std::ios::out, m_pcapDlt);

  phy->TraceConnectWithoutContext ("MonitorSnifferTx", MakeBoundCallback (&PcapSniffTxEvent, file));

  phy->TraceConnectWithoutContext ("MonitorSnifferRx", MakeBoundCallback (&PcapSniffRxEvent, file));

}

void

YansWifiPhyHelper::EnableAsciiInternal (

  Ptr<OutputStreamWrapper> stream,

  std::string prefix,

  Ptr<NetDevice> nd,

  bool explicitFilename)

{

  //

  // All of the ascii enable functions vector through here including the ones

  // that are wandering through all of devices on perhaps all of the nodes in

  // the system.  We can only deal with devices of type WifiNetDevice.

  //

  Ptr<WifiNetDevice> device = nd->GetObject<WifiNetDevice> ();

  if (device == 0)

    {

      NS_LOG_INFO ("YansWifiHelper::EnableAsciiInternal(): Device " << device << " not of type ns3::WifiNetDevice");

      return;

    }

  //

  // Our trace sinks are going to use packet printing, so we have to make sure

  // that is turned on.

  //

  Packet::EnablePrinting ();

  uint32_t nodeid = nd->GetNode ()->GetId ();

  uint32_t deviceid = nd->GetIfIndex ();

  std::ostringstream oss;

  //

  // If we are not provided an OutputStreamWrapper, we are expected to create

  // one using the usual trace filename conventions and write our traces

  // without a context since there will be one file per context and therefore

  // the context would be redundant.

  //

  if (stream == 0)