ipv4-queue-disc-item.h

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/*
 * 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 "ipv4-header.h"
 
#include "ns3/packet.h"
#include "ns3/queue-item.h"
 
namespace ns3
{
 
class Ipv4QueueDiscItem : public QueueDiscItem
{
  public:
    Ipv4QueueDiscItem(Ptr<Packet> p,
                      const Address& addr,
                      uint16_t protocol,
                      const Ipv4Header& header);
 
    ~Ipv4QueueDiscItem() override;
 
    // Delete default constructor, copy constructor and assignment operator to avoid misuse
    Ipv4QueueDiscItem() = delete;
    Ipv4QueueDiscItem(const Ipv4QueueDiscItem&) = delete;
    Ipv4QueueDiscItem& operator=(const Ipv4QueueDiscItem&) = delete;
 
    uint32_t GetSize() const override;
 
    const Ipv4Header& GetHeader() const;
 
    void AddHeader() override;
 
    void Print(std::ostream& os) const override;
 
    /*
     * 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)
     */
    bool GetUint8Value(Uint8Values field, uint8_t& value) const override;
 
    bool Mark() override;
 
    uint32_t Hash(uint32_t perturbation) const override;
 
  private:
    Ipv4Header m_header; 
    bool m_headerAdded;  
};
 
} // namespace ns3
 
#endif /* IPV4_QUEUE_DISC_ITEM_H */