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

/*

 * Copyright (c) 2005 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>

 */

#ifndef DCF_H

#define DCF_H

#include "ns3/object.h"

namespace ns3 {

/**

 * \ingroup wifi

 *

 */

class Dcf : public Object

{

public:

  static TypeId GetTypeId (void);

  /**

   * Set the minimum congestion window size.

   *

   * \param minCw the minimum congestion window size

   */

  virtual void SetMinCw (uint32_t minCw) = 0;

  /**

   * Set the maximum congestion window size.

   *

   * \param maxCw the maximum congestion window size

   */

  virtual void SetMaxCw (uint32_t maxCw) = 0;

  /**

   * \param aifsn the number of slots which make up an AIFS for a specific DCF.

   *        a DIFS corresponds to an AIFSN = 2.

   *

   * Calling this method after DcfManager::Add has been called is not recommended.

   */

  virtual void SetAifsn (uint32_t aifsn) = 0;

  /**

   * Return the minimum congestion window size.

   *

   * \return the minimum congestion window size

   */

  virtual uint32_t GetMinCw (void) const = 0;

  /**

   * Return the maximum congestion window size.

   *

   * \return the maximum congestion window size

   */

  virtual uint32_t GetMaxCw (void) const = 0;

  /**

   * Return the number of slots that make up an AIFS.

   *

   * \return the number of slots that make up an AIFS

   */

  virtual uint32_t GetAifsn (void) const = 0;

};

} // namespace ns3

#endif /* DCF_H */