text: /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
  /*
   * Copyright (c) 2005,2006 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
   *          Sébastien Deronne <sebastien.deronne@gmail.com>
   */
  
  #ifndef WIFI_PHY_STATE_H
  #define WIFI_PHY_STATE_H
  
  #include "ns3/fatal-error.h"
  
  /**
    * The state of the PHY layer.
    */
  /// State enumeration
  enum WifiPhyState
  {
    /**
     * The PHY layer is IDLE.
      */
    IDLE,
    /**
      * The PHY layer has sense the medium busy through the CCA mechanism
      */
    CCA_BUSY,
    /**
      * The PHY layer is sending a packet.
      */
    TX,
    /**
      * The PHY layer is receiving a packet.
      */
    RX,
    /**
      * The PHY layer is switching to other channel.
      */
    SWITCHING,
    /**
      * The PHY layer is sleeping.
      */
    SLEEP,
    /**
      * The PHY layer is switched off.
      */
    OFF
  };
  
  /**
  * \brief Stream insertion operator.
  *
  * \param os the stream
  * \param state the state
  * \returns a reference to the stream
  */
  inline std::ostream& operator<< (std::ostream& os, WifiPhyState state)
  {
    switch (state)
      {
      case IDLE:
        return (os << "IDLE");
      case CCA_BUSY:
        return (os << "CCA_BUSY");
      case TX:
        return (os << "TX");
      case RX:
        return (os << "RX");
      case SWITCHING:
        return (os << "SWITCHING");
      case SLEEP:
        return (os << "SLEEP");
      case OFF:
        return (os << "OFF");
      default:
        NS_FATAL_ERROR ("Invalid state");
        return (os << "INVALID");
      }
  }
  
  #endif /* WIFI_PHY_STATE_H */
  