477a4a7178
The code detecting duplicate packets in the RDC layer had been copied into most RDC implementations. Factor it out into a new mac-sequence module in order to have a single instance of this code. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
66 lines
2.6 KiB
C
66 lines
2.6 KiB
C
/*
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* Copyright (c) 2010, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Copyright (c) 2013, ADVANSEE - http://www.advansee.com/
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* Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/**
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* \file
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* Header file for MAC sequence numbers management
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* \author
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* Adam Dunkels <adam@sics.se>
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* Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
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*/
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#ifndef MAC_SEQUENCE_H
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#define MAC_SEQUENCE_H
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/**
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* \brief Tell whether the packetbuf is a duplicate packet
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* \return Non-zero if the packetbuf is a duplicate packet, zero otherwise
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*
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* This function is used to check for duplicate packet by comparing
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* the sequence number of the incoming packet with the last few ones
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* we saw, filtering with the Rime address.
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*/
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int mac_sequence_is_duplicate(void);
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/**
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* \brief Register the sequence number of the packetbuf
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*
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* This function is used to add the sequence number of the incoming
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* packet to the history.
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*/
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void mac_sequence_register_seqno(void);
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#endif /* MAC_SEQUENCE_H */
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