ipv4-queue-disc-item.h

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2016 Universita' degli Studi di Napoli Federico II
 *
 * 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
 */

#ifndef IPV4_QUEUE_DISC_ITEM_H
#define IPV4_QUEUE_DISC_ITEM_H

#include "ns3/packet.h"
#include "ns3/queue-item.h"
#include "ipv4-header.h"

namespace ns3 {

class Ipv4QueueDiscItem : public QueueDiscItem {
public:
  Ipv4QueueDiscItem (Ptr<Packet> p, const Address & addr, uint16_t protocol, const Ipv4Header & header);

  virtual ~Ipv4QueueDiscItem ();

  virtual uint32_t GetSize (void) const;

  const Ipv4Header & GetHeader (void) const;

  virtual void AddHeader (void);

  virtual void Print (std::ostream &os) const;

  /*
   * The values for the fields of the Ipv4 header are taken from m_header and
   * thus might differ from those present in the packet in case the header is
   * modified after being added to the packet. However, this function is likely
   * to be called before the header is added to the packet (i.e., before the
   * packet is dequeued from the queue disc)
   */
  virtual bool GetUint8Value (Uint8Values field, uint8_t &value) const;

  virtual bool Mark (void);

  virtual uint32_t Hash (uint32_t perturbation) const;

private:
  Ipv4QueueDiscItem ();
  Ipv4QueueDiscItem (const Ipv4QueueDiscItem &);
  Ipv4QueueDiscItem &operator = (const Ipv4QueueDiscItem &);

  Ipv4Header m_header;  
  bool m_headerAdded;   
};

} // namespace ns3

#endif /* IPV4_QUEUE_DISC_ITEM_H */