/*
 * Copyright (c) 2010, Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Copyright (c) 2013, ADVANSEE - http://www.advansee.com/
 * Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
 * 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
 *         Header file for MAC sequence numbers management
 * \author
 *         Adam Dunkels <adam@sics.se>
 *         Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
 */

#ifndef MAC_SEQUENCE_H
#define MAC_SEQUENCE_H

/**
 * \brief      Tell whether the packetbuf is a duplicate packet
 * \return     Non-zero if the packetbuf is a duplicate packet, zero otherwise
 *
 *             This function is used to check for duplicate packet by comparing
 *             the sequence number of the incoming packet with the last few ones
 *             we saw, filtering with the Rime address.
 */
int mac_sequence_is_duplicate(struct net_buf *buf);

/**
 * \brief      Register the sequence number of the packetbuf
 *
 *             This function is used to add the sequence number of the incoming
 *             packet to the history.
 */
void mac_sequence_register_seqno(struct net_buf *buf);

#endif /* MAC_SEQUENCE_H */