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

/*

 * Copyright (c) 2006 Georgia Tech Research Corporation, 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

 *

 * Authors: George F. Riley<riley@ece.gatech.edu>

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

 */

#include "node.h"

#include "node-list.h"

#include "net-device.h"

#include "application.h"

#include "packet-socket-factory.h"

#include "ns3/simulator.h"

#include "ns3/composite-trace-resolver.h"

namespace ns3{

const InterfaceId Node::iid = MakeInterfaceId ("Node", Object::iid);

Node::Node()

  : m_id(0), 

    m_sid(0)

{

  Construct ();

}

Node::Node(uint32_t sid)

  : m_id(0), 

    m_sid(sid)

{ 

  Construct ();

}

void

Node::Construct (void)

{

  SetInterfaceId (Node::iid);

  m_id = NodeList::Add (this);

  Ptr<PacketSocketFactory> socketFactory = Create<PacketSocketFactory> ();

  AddInterface (socketFactory);

}

Node::~Node ()

{}

TraceResolver *

Node::CreateTraceResolver (TraceContext const &context)

{

  CompositeTraceResolver *resolver = new CompositeTraceResolver (context);

  DoFillTraceResolver (*resolver);

  return resolver;

}

uint32_t 

Node::GetId (void) const

{

  return m_id;

}

uint32_t 

Node::GetSystemId (void) const

{

  return m_sid;

}

uint32_t 

Node::AddDevice (Ptr<NetDevice> device)

{

  uint32_t index = m_devices.size ();

  m_devices.push_back (device);

  device->SetIfIndex(index);

  device->SetReceiveCallback (MakeCallback (&Node::ReceiveFromDevice, this));

  NotifyDeviceAdded (device);

  return index;

}

Ptr<NetDevice>

Node::GetDevice (uint32_t index) const

{

  return m_devices[index];

}

uint32_t 

Node::GetNDevices (void) const

{

  return m_devices.size ();

}

uint32_t 

Node::AddApplication (Ptr<Application> application)

{

  uint32_t index = m_applications.size ();

  m_applications.push_back (application);

  return index;

}

Ptr<Application> 

Node::GetApplication (uint32_t index) const

{

  return m_applications[index];

}

uint32_t 

Node::GetNApplications (void) const

{

  return m_applications.size ();

}

TraceResolver *

Node::CreateDevicesTraceResolver (const TraceContext &context)

{

  ArrayTraceResolver<Ptr<NetDevice> > *resolver = 

    new ArrayTraceResolver<Ptr<NetDevice> > (context,

                                             MakeCallback (&Node::GetNDevices, this), 

                                             MakeCallback (&Node::GetDevice, this));

  return resolver;

}

void

Node::DoFillTraceResolver (CompositeTraceResolver &resolver)

{

  resolver.Add ("devices", 

                MakeCallback (&Node::CreateDevicesTraceResolver, this),

                Node::DEVICES);

}

void 

Node::DoDispose()

{

  for (std::vector<Ptr<NetDevice> >::iterator i = m_devices.begin ();

       i != m_devices.end (); i++)

    {

      Ptr<NetDevice> device = *i;

      device->Dispose ();

      *i = 0;

    }

  m_devices.clear ();

  for (std::vector<Ptr<Application> >::iterator i = m_applications.begin ();

       i != m_applications.end (); i++)

    {

      Ptr<Application> application = *i;

      application->Dispose ();

      *i = 0;

    }

  m_applications.clear ();

  Object::DoDispose ();

}

void 

Node::NotifyDeviceAdded (Ptr<NetDevice> device)

{}

void

Node::RegisterProtocolHandler (ProtocolHandler handler, 

                               uint16_t protocolType,

                               Ptr<NetDevice> device)

{

  struct Node::ProtocolHandlerEntry entry;

  entry.handler = handler;

  entry.protocol = protocolType;

  entry.device = device;

  m_handlers.push_back (entry);

}

void

Node::UnregisterProtocolHandler (ProtocolHandler handler)

{

  for (ProtocolHandlerList::iterator i = m_handlers.begin ();

       i != m_handlers.end (); i++)

    {

      if (i->handler.IsEqual (handler))

        {

          m_handlers.erase (i);

          break;

        }

    }

}

bool

Node::ReceiveFromDevice (Ptr<NetDevice> device, const Packet &packet, 

                         uint16_t protocol, const Address &from)

{

  bool found = false;

  for (ProtocolHandlerList::iterator i = m_handlers.begin ();

       i != m_handlers.end (); i++)

    {

      if (i->device == 0 ||

          (i->device != 0 && i->device == device))

        {

          if (i->protocol == 0 || 

              i->protocol == protocol)

            {

              i->handler (device, packet, protocol, from);

              found = true;

            }

        }

    }

  return found;

}

}//namespace ns3