nes-proj/os/net/mac/tsch/tsch-packet.h
2017-09-29 22:18:48 +02:00

112 lines
4.2 KiB
C

/*
* Copyright (c) 2014, SICS Swedish ICT.
* 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.
*
*/
/**
* \addtogroup tsch
* @{
*/
#ifndef __TSCH_PACKET_H__
#define __TSCH_PACKET_H__
/********** Includes **********/
#include "contiki.h"
#include "net/packetbuf.h"
#include "net/mac/tsch/tsch-private.h"
#include "net/mac/framer/frame802154.h"
#include "net/mac/framer/frame802154e-ie.h"
/******** Configuration *******/
/* TSCH EB: include timeslot timing Information Element? */
#ifdef TSCH_PACKET_CONF_EB_WITH_TIMESLOT_TIMING
#define TSCH_PACKET_EB_WITH_TIMESLOT_TIMING TSCH_PACKET_CONF_EB_WITH_TIMESLOT_TIMING
#else
#define TSCH_PACKET_EB_WITH_TIMESLOT_TIMING 0
#endif
/* TSCH EB: include hopping sequence Information Element? */
#ifdef TSCH_PACKET_CONF_EB_WITH_HOPPING_SEQUENCE
#define TSCH_PACKET_EB_WITH_HOPPING_SEQUENCE TSCH_PACKET_CONF_EB_WITH_HOPPING_SEQUENCE
#else
#define TSCH_PACKET_EB_WITH_HOPPING_SEQUENCE 0
#endif
/* TSCH EB: include slotframe and link Information Element? */
#ifdef TSCH_PACKET_CONF_EB_WITH_SLOTFRAME_AND_LINK
#define TSCH_PACKET_EB_WITH_SLOTFRAME_AND_LINK TSCH_PACKET_CONF_EB_WITH_SLOTFRAME_AND_LINK
#else
#define TSCH_PACKET_EB_WITH_SLOTFRAME_AND_LINK 0
#endif
/* Include source address in ACK? */
#ifdef TSCH_PACKET_CONF_EACK_WITH_SRC_ADDR
#define TSCH_PACKET_EACK_WITH_SRC_ADDR TSCH_PACKET_CONF_EACK_WITH_SRC_ADDR
#else
#define TSCH_PACKET_EACK_WITH_SRC_ADDR 0
#endif
/* Include destination address in ACK? */
#ifdef TSCH_PACKET_CONF_EACK_WITH_DEST_ADDR
#define TSCH_PACKET_EACK_WITH_DEST_ADDR TSCH_PACKET_CONF_EACK_WITH_DEST_ADDR
#else
#define TSCH_PACKET_EACK_WITH_DEST_ADDR 1 /* Include destination address
by default, useful in case of duplicate seqno */
#endif
/********** Constants *********/
/* Max TSCH packet lenght */
#define TSCH_PACKET_MAX_LEN MIN(127,PACKETBUF_SIZE)
/********** Functions *********/
/* Construct enhanced ACK packet and return ACK length */
int tsch_packet_create_eack(uint8_t *buf, uint16_t buf_size,
const linkaddr_t *dest_addr, uint8_t seqno,
int16_t drift, int nack);
/* Parse enhanced ACK packet, extract drift and nack */
int tsch_packet_parse_eack(const uint8_t *buf, int buf_size,
uint8_t seqno, frame802154_t *frame, struct ieee802154_ies *ies, uint8_t *hdr_len);
/* Create an EB packet */
int tsch_packet_create_eb(uint8_t *hdr_len, uint8_t *tsch_sync_ie_ptr);
/* Update ASN in EB packet */
int tsch_packet_update_eb(uint8_t *buf, int buf_size, uint8_t tsch_sync_ie_offset);
/* Parse EB and extract ASN and join priority */
int tsch_packet_parse_eb(const uint8_t *buf, int buf_size,
frame802154_t *frame, struct ieee802154_ies *ies,
uint8_t *hdrlen, int frame_without_mic);
#endif /* __TSCH_PACKET_H__ */
/** @} */