/*
 * Copyright (c) 2010, Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * This file is part of the Contiki operating system.
 *
 */

/**
 * \file
 *         RDC driver header file
 * \author
 *         Adam Dunkels <adam@sics.se>
 *         Niclas Finne <nfi@sics.se>
 */

#ifndef RDC_H_
#define RDC_H_

#include "contiki-conf.h"
#include "net/mac/mac.h"
#include "net/llsec/llsec802154.h"

#ifdef RDC_CONF_WITH_DUPLICATE_DETECTION
#define RDC_WITH_DUPLICATE_DETECTION RDC_CONF_WITH_DUPLICATE_DETECTION
#else /* RDC_CONF_WITH_DUPLICATE_DETECTION */
/* As frames can be spoofed, the RDC layer should not discard a
   frame because it has seen its sequence number already. Replay
   protection should be implemented at the LLSEC layer where the
   authenticity of frames is verified. */
#define RDC_WITH_DUPLICATE_DETECTION !LLSEC802154_ENABLED
#endif /* RDC_CONF_WITH_DUPLICATE_DETECTION */

/* List of packets to be sent by RDC layer */
struct rdc_buf_list {
  struct rdc_buf_list *next;
  struct queuebuf *buf;
  void *ptr;
};

/**
 * The structure of a RDC (radio duty cycling) driver in Contiki.
 */
struct rdc_driver {
  char *name;

  /** Initialize the RDC driver */
  void (* init)(void);

  /** Send a packet from the Rime buffer  */
  void (* send)(mac_callback_t sent_callback, void *ptr);

  /** Send a packet list */
  void (* send_list)(mac_callback_t sent_callback, void *ptr, struct rdc_buf_list *list);

  /** Callback for getting notified of incoming packet. */
  void (* input)(void);

  /** Turn the MAC layer on. */
  int (* on)(void);

  /** Turn the MAC layer off. */
  int (* off)(int keep_radio_on);

  /** Returns the channel check interval, expressed in clock_time_t ticks. */
  clock_time_t (* channel_check_interval)(void);
};

#endif /* RDC_H_ */