174 lines
6.6 KiB
C
174 lines
6.6 KiB
C
/*
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* Copyright (c) 2014, SICS Swedish ICT.
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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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* \addtogroup tsch
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* @{
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*/
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#ifndef __TSCH_SCHEDULE_H__
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#define __TSCH_SCHEDULE_H__
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/********** Includes **********/
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#include "contiki.h"
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#include "lib/list.h"
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#include "net/mac/tsch/tsch-private.h"
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#include "net/mac/tsch/tsch-queue.h"
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#include "net/mac/tsch/tsch-slot-operation.h"
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#include "net/linkaddr.h"
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/******** Configuration *******/
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/* Initializes TSCH with a 6TiSCH minimal schedule */
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#ifdef TSCH_SCHEDULE_CONF_WITH_6TISCH_MINIMAL
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#define TSCH_SCHEDULE_WITH_6TISCH_MINIMAL TSCH_SCHEDULE_CONF_WITH_6TISCH_MINIMAL
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#else
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#define TSCH_SCHEDULE_WITH_6TISCH_MINIMAL 1
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#endif
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/* 6TiSCH Minimal schedule slotframe length */
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#ifdef TSCH_SCHEDULE_CONF_DEFAULT_LENGTH
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#define TSCH_SCHEDULE_DEFAULT_LENGTH TSCH_SCHEDULE_CONF_DEFAULT_LENGTH
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#else
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#define TSCH_SCHEDULE_DEFAULT_LENGTH 7
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#endif
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/* Max number of TSCH slotframes */
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#ifdef TSCH_SCHEDULE_CONF_MAX_SLOTFRAMES
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#define TSCH_SCHEDULE_MAX_SLOTFRAMES TSCH_SCHEDULE_CONF_MAX_SLOTFRAMES
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#else
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#define TSCH_SCHEDULE_MAX_SLOTFRAMES 4
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#endif
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/* Max number of links */
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#ifdef TSCH_SCHEDULE_CONF_MAX_LINKS
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#define TSCH_SCHEDULE_MAX_LINKS TSCH_SCHEDULE_CONF_MAX_LINKS
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#else
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#define TSCH_SCHEDULE_MAX_LINKS 32
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#endif
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/********** Constants *********/
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/* Link options */
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#define LINK_OPTION_TX 1
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#define LINK_OPTION_RX 2
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#define LINK_OPTION_SHARED 4
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#define LINK_OPTION_TIME_KEEPING 8
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/************ Types ***********/
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/* 802.15.4e link types.
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* LINK_TYPE_ADVERTISING_ONLY is an extra one: for EB-only links. */
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enum link_type { LINK_TYPE_NORMAL, LINK_TYPE_ADVERTISING, LINK_TYPE_ADVERTISING_ONLY };
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struct tsch_link {
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/* Links are stored as a list: "next" must be the first field */
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struct tsch_link *next;
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/* Unique identifier */
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uint16_t handle;
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/* MAC address of neighbor */
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linkaddr_t addr;
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/* Slotframe identifier */
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uint16_t slotframe_handle;
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/* Identifier of Slotframe to which this link belongs
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* Unused. */
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/* uint8_t handle; */
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/* Timeslot for this link */
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uint16_t timeslot;
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/* Channel offset for this link */
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uint16_t channel_offset;
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/* A bit string that defines
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* b0 = Transmit, b1 = Receive, b2 = Shared, b3 = Timekeeping, b4 = reserved */
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uint8_t link_options;
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/* Type of link. NORMAL = 0. ADVERTISING = 1, and indicates
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the link may be used to send an Enhanced beacon. */
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enum link_type link_type;
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/* Any other data for upper layers */
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void *data;
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};
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struct tsch_slotframe {
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/* Slotframes are stored as a list: "next" must be the first field */
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struct tsch_slotframe *next;
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/* Unique identifier */
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uint16_t handle;
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/* Number of timeslots in the slotframe.
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* Stored as struct asn_divisor_t because we often need ASN%size */
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struct tsch_asn_divisor_t size;
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/* List of links belonging to this slotframe */
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LIST_STRUCT(links_list);
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};
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/********** Functions *********/
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/* Module initialization, call only once at startup. Returns 1 is success, 0 if failure. */
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int tsch_schedule_init(void);
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/* Create a 6TiSCH minimal schedule */
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void tsch_schedule_create_minimal(void);
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/* Prints out the current schedule (all slotframes and links) */
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void tsch_schedule_print(void);
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/* Adds and returns a slotframe (NULL if failure) */
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struct tsch_slotframe *tsch_schedule_add_slotframe(uint16_t handle, uint16_t size);
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/* Looks for a slotframe from a handle */
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struct tsch_slotframe *tsch_schedule_get_slotframe_by_handle(uint16_t handle);
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/* Removes a slotframe Return 1 if success, 0 if failure */
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int tsch_schedule_remove_slotframe(struct tsch_slotframe *slotframe);
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/* Removes all slotframes, resulting in an empty schedule */
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int tsch_schedule_remove_all_slotframes(void);
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/* Returns next slotframe */
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struct tsch_slotframe *tsch_schedule_slotframes_next(struct tsch_slotframe *sf);
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/* Adds a link to a slotframe, return a pointer to it (NULL if failure) */
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struct tsch_link *tsch_schedule_add_link(struct tsch_slotframe *slotframe,
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uint8_t link_options, enum link_type link_type, const linkaddr_t *address,
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uint16_t timeslot, uint16_t channel_offset);
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/* Looks for a link from a handle */
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struct tsch_link *tsch_schedule_get_link_by_handle(uint16_t handle);
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/* Looks within a slotframe for a link with a given timeslot */
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struct tsch_link *tsch_schedule_get_link_by_timeslot(struct tsch_slotframe *slotframe, uint16_t timeslot);
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/* Removes a link. Return 1 if success, 0 if failure */
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int tsch_schedule_remove_link(struct tsch_slotframe *slotframe, struct tsch_link *l);
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/* Removes a link from slotframe and timeslot. Return a 1 if success, 0 if failure */
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int tsch_schedule_remove_link_by_timeslot(struct tsch_slotframe *slotframe, uint16_t timeslot);
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/* Returns the next active link after a given ASN, and a backup link (for the same ASN, with Rx flag) */
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struct tsch_link * tsch_schedule_get_next_active_link(struct tsch_asn_t *asn, uint16_t *time_offset,
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struct tsch_link **backup_link);
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/* Access to slotframe list */
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struct tsch_slotframe *tsch_schedule_slotframe_head(void);
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struct tsch_slotframe *tsch_schedule_slotframe_next(struct tsch_slotframe *sf);
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#endif /* __TSCH_SCHEDULE_H__ */
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/** @} */
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