fd-net-device.h

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2012 INRIA, 2012 University of Washington
 *
 * 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: Alina Quereilhac <alina.quereilhac@inria.fr>
 *         Claudio Freire <klaussfreire@sourceforge.net>
 */

#ifndef FD_NET_DEVICE_H
#define FD_NET_DEVICE_H

#include "ns3/address.h"
#include "ns3/callback.h"
#include "ns3/data-rate.h"
#include "ns3/event-id.h"
#include "ns3/mac48-address.h"
#include "ns3/net-device.h"
#include "ns3/node.h"
#include "ns3/packet.h"
#include "ns3/ptr.h"
#include "ns3/system-condition.h"
#include "ns3/traced-callback.h"
#include "ns3/unix-fd-reader.h"
#include "ns3/system-mutex.h"

#include <string.h>

namespace ns3 {

class FdNetDeviceFdReader : public FdReader
{
public:
  FdNetDeviceFdReader ();

  void SetBufferSize (uint32_t bufferSize);

private:
  FdReader::Data DoRead (void);
  
  uint32_t m_bufferSize;
};

class Node;

class FdNetDevice : public NetDevice
{
public:
  static TypeId GetTypeId (void);

  enum EncapsulationMode
  {
    DIX,         
    LLC,         
    DIXPI,       
  };

  FdNetDevice ();

  virtual ~FdNetDevice ();

  void SetEncapsulationMode (FdNetDevice::EncapsulationMode mode);

  FdNetDevice::EncapsulationMode GetEncapsulationMode (void) const;

  void SetFileDescriptor (int fd);

  void Start (Time tStart);

  void Stop (Time tStop);

  // inherited from NetDevice base class.
  virtual void SetIfIndex (const uint32_t index);
  virtual uint32_t GetIfIndex (void) const;
  virtual Ptr<Channel> GetChannel (void) const;
  virtual void SetAddress (Address address);
  virtual Address GetAddress (void) const;
  virtual bool SetMtu (const uint16_t mtu);
  virtual uint16_t GetMtu (void) const;
  virtual bool IsLinkUp (void) const;
  virtual void AddLinkChangeCallback (Callback<void> callback);
  virtual bool IsBroadcast (void) const;
  virtual Address GetBroadcast (void) const;
  virtual bool IsMulticast (void) const;
  virtual Address GetMulticast (Ipv4Address multicastGroup) const;
  virtual bool IsPointToPoint (void) const;
  virtual bool IsBridge (void) const;
  virtual bool Send (Ptr<Packet> packet, const Address& dest, uint16_t protocolNumber);
  virtual bool SendFrom (Ptr<Packet> packet, const Address& source, const Address& dest, uint16_t protocolNumber);
  virtual Ptr<Node> GetNode (void) const;
  virtual void SetNode (Ptr<Node> node);
  virtual bool NeedsArp (void) const;
  virtual void SetReceiveCallback (NetDevice::ReceiveCallback cb);
  virtual void SetPromiscReceiveCallback (NetDevice::PromiscReceiveCallback cb);
  virtual bool SupportsSendFrom () const;
  virtual Address GetMulticast (Ipv6Address addr) const;

  virtual void SetIsBroadcast (bool broadcast);
  virtual void SetIsMulticast (bool multicast);

protected:
  virtual void DoDispose (void);

private:
  // private copy constructor as sugested in:
  // http://www.nsnam.org/wiki/NS-3_Python_Bindings#.22invalid_use_of_incomplete_type.22
  FdNetDevice (FdNetDevice const &);

  void StartDevice (void);

  void StopDevice (void);

  void ReceiveCallback (uint8_t *buf, ssize_t len);

  void ForwardUp (uint8_t *buf, ssize_t len);

  bool TransmitStart (Ptr<Packet> p);

  void NotifyLinkUp (void);

  Ptr<Node> m_node;

  /*
   * a copy of the node id so the read thread doesn't have to GetNode() in
   * in order to find the node ID.  Thread unsafe reference counting in
   * multithreaded apps is not a good thing.
   */
  uint32_t m_nodeId;

  uint32_t m_ifIndex;

  uint16_t m_mtu;

  int m_fd;

  Ptr<FdNetDeviceFdReader> m_fdReader;

  Mac48Address m_address;

  EncapsulationMode m_encapMode;

  bool m_linkUp;

  TracedCallback<> m_linkChangeCallbacks;

  bool m_isBroadcast;

  bool m_isMulticast;

  uint32_t m_pendingReadCount;
  
  uint32_t m_maxPendingReads;
  
   
  SystemMutex m_pendingReadMutex;

  Time m_tStart;

  Time m_tStop;

  EventId m_startEvent;
  EventId m_stopEvent;

  NetDevice::ReceiveCallback m_rxCallback;

  NetDevice::PromiscReceiveCallback m_promiscRxCallback;

  TracedCallback<Ptr<const Packet> > m_macTxTrace;

  TracedCallback<Ptr<const Packet> > m_macTxDropTrace;

  TracedCallback<Ptr<const Packet> > m_macPromiscRxTrace;

  TracedCallback<Ptr<const Packet> > m_macRxTrace;

  TracedCallback<Ptr<const Packet> > m_macRxDropTrace;

  TracedCallback<Ptr<const Packet> > m_phyTxDropTrace;

  TracedCallback<Ptr<const Packet> > m_phyRxDropTrace;

  TracedCallback<Ptr<const Packet> > m_snifferTrace;

  TracedCallback<Ptr<const Packet> > m_promiscSnifferTrace;

};

} // namespace ns3

#endif /* FD_NET_DEVICE_H */