osd-contiki/core/net/nbr-table.h

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/*
* Copyright (c) 2013, Swedish Institute of Computer Science
* Copyright (c) 2010, Vrije Universiteit Brussel
* 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.
*
*
* Authors: Simon Duquennoy <simonduq@sics.se>
* Joris Borms <joris.borms@vub.ac.be>
*/
#ifndef NBR_TABLE_H_
#define NBR_TABLE_H_
#include "contiki.h"
#include "net/linkaddr.h"
#include "net/netstack.h"
/* Neighbor table size */
#ifdef NBR_TABLE_CONF_MAX_NEIGHBORS
#define NBR_TABLE_MAX_NEIGHBORS NBR_TABLE_CONF_MAX_NEIGHBORS
#else /* NBR_TABLE_CONF_MAX_NEIGHBORS */
#define NBR_TABLE_MAX_NEIGHBORS 8
#endif /* NBR_TABLE_CONF_MAX_NEIGHBORS */
/* An item in a neighbor table */
typedef void nbr_table_item_t;
/* Callback function, called when removing an item from a table */
typedef void(nbr_table_callback)(nbr_table_item_t *item);
/* A neighbor table */
typedef struct nbr_table {
int index;
int item_size;
nbr_table_callback *callback;
nbr_table_item_t *data;
} nbr_table_t;
/** \brief A static neighbor table. To be initialized through nbr_table_register(name) */
#define NBR_TABLE(type, name) \
static type _##name##_mem[NBR_TABLE_MAX_NEIGHBORS]; \
static nbr_table_t name##_struct = { 0, sizeof(type), NULL, (nbr_table_item_t *)_##name##_mem }; \
static nbr_table_t *name = &name##_struct \
/** \brief A non-static neighbor table. To be initialized through nbr_table_register(name) */
#define NBR_TABLE_GLOBAL(type, name) \
static type _##name##_mem[NBR_TABLE_MAX_NEIGHBORS]; \
static nbr_table_t name##_struct = { 0, sizeof(type), NULL, (nbr_table_item_t *)_##name##_mem }; \
nbr_table_t *name = &name##_struct \
/** \brief Declaration of non-static neighbor tables */
#define NBR_TABLE_DECLARE(name) extern nbr_table_t *name
typedef enum {
NBR_TABLE_REASON_UNDEFINED,
NBR_TABLE_REASON_RPL_DIO,
NBR_TABLE_REASON_RPL_DAO,
NBR_TABLE_REASON_RPL_DIS,
NBR_TABLE_REASON_ROUTE,
NBR_TABLE_REASON_IPV6_ND,
NBR_TABLE_REASON_MAC,
NBR_TABLE_REASON_LLSEC
} nbr_table_reason_t;
/** \name Neighbor tables: register and loop through table elements */
/** @{ */
int nbr_table_register(nbr_table_t *table, nbr_table_callback *callback);
nbr_table_item_t *nbr_table_head(nbr_table_t *table);
nbr_table_item_t *nbr_table_next(nbr_table_t *table, nbr_table_item_t *item);
/** @} */
/** \name Neighbor tables: add and get data */
/** @{ */
nbr_table_item_t *nbr_table_add_lladdr(nbr_table_t *table, const linkaddr_t *lladdr, nbr_table_reason_t reason, void *data);
nbr_table_item_t *nbr_table_get_from_lladdr(nbr_table_t *table, const linkaddr_t *lladdr);
/** @} */
/** \name Neighbor tables: set flags (unused, locked, unlocked) */
/** @{ */
int nbr_table_remove(nbr_table_t *table, nbr_table_item_t *item);
int nbr_table_lock(nbr_table_t *table, nbr_table_item_t *item);
int nbr_table_unlock(nbr_table_t *table, nbr_table_item_t *item);
/** @} */
/** \name Neighbor tables: address manipulation */
/** @{ */
linkaddr_t *nbr_table_get_lladdr(nbr_table_t *table, const nbr_table_item_t *item);
int nbr_table_update_lladdr(const linkaddr_t *old_addr, const linkaddr_t *new_addr, int remove_if_duplicate);
/** @} */
#endif /* NBR_TABLE_H_ */