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162 lines
5.7 KiB
C
162 lines
5.7 KiB
C
/*
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* Copyright (c) 2010, Vrije Universiteit Brussel
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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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*
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* Author: Joris Borms <joris.borms@vub.ac.be>
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*
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*/
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#ifndef NEIGHBORATTR_H_
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#define NEIGHBORATTR_H_
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#include "net/rime.h"
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/**
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* define how many neighbors you can store
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*/
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#ifdef NEIGHBOR_CONF_MAX_NEIGHBORS
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#define MAX_NEIGHBORS NEIGHBOR_CONF_MAX_NEIGHBORS
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#else /* NEIGHBOR_CONF_MAX_NEIGHBORS */
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#define MAX_NEIGHBORS 12
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#endif /* NEIGHBOR_CONF_MAX_NEIGHBORS */
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/**
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* \brief properties of a single neighbor
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*/
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struct neighbor_addr {
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struct neighbor_addr *next;
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rimeaddr_t addr;
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uint16_t time;
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uint16_t index;
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};
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/**
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* \brief properties that define a neighbor attribute
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*/
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struct neighbor_attr {
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struct neighbor_attr *next;
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uint16_t size;
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void *default_value;
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void *data;
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};
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/**
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* \brief Define space for additional parameters in neighbor table entries.
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* \param type The type of the attribute.
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* \param name The name of the attribute.
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* \param def A ptr to the default value for this attribute. If NULL, attribute will
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* be filled with zeroes by default.
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*
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* The attribute 'name' should be registered with 'neighbor_attr_register'
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* during initialization.
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*/
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#define NEIGHBOR_ATTRIBUTE(type, name, default_value_ptr) \
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static type _##name##_mem[MAX_NEIGHBORS]; \
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static struct neighbor_attr name = \
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{NULL, sizeof(type), default_value_ptr, (void*)_##name##_mem} ; \
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/** Same as NEIGHBOR_ATTRIBUTE, only the attr is not declared static
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* this way you can say <tt>extern struct neighbor_attr name</tt> in header to declare
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* a global neighbor attribute
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*/
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#define NEIGHBOR_ATTRIBUTE_NONSTATIC(type, name, default_value_ptr) \
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static type _##name##_mem[MAX_NEIGHBORS]; \
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struct neighbor_attr name = \
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{NULL, sizeof(type), default_value_ptr, (void*)_##name##_mem} ; \
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/**
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* \brief register a neighbor attribute
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* \retval non-zero if successful, zero if not
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*/
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int neighbor_attr_register(struct neighbor_attr *);
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/**
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* \retval head of neighbor list, useful for iterating over all neighbors
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*/
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struct neighbor_addr *neighbor_attr_list_neighbors(void);
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/**
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* \brief Check if a neighbor is already added to the neighbor table
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* \retval non-zero if present, zero if not
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*/
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int neighbor_attr_has_neighbor(const rimeaddr_t * addr);
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/**
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* \brief Add a neighbor entry to neighbor table
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* \retval -1 if unsuccessful, 0 if the neighbor was already
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* in the table, and 1 if successful
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*/
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int neighbor_attr_add_neighbor(const rimeaddr_t * addr);
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/**
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* \brief Remove a neighbor entry to neighbor table
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* \retval -1 if unsuccessful, 0 if the neighbor was removed
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*/
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int neighbor_attr_remove_neighbor(const rimeaddr_t * addr);
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/**
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* \brief Get pointer to neighbor table data specified by id
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* \param requested attribute
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* \param addr requested neighbor
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* \retval pointer to data, NULL if neighbor was not found
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*
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* Searches neighbor table for addr and returns pointer to data section
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* specified by attribute type and addr.
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* This pointer should not be saved, as it may point to data from another
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* neighbor in the future if neighbors get removed/added over time.
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*/
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void *neighbor_attr_get_data(struct neighbor_attr *, const rimeaddr_t * addr);
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/**
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* \brief Copy data to neighbor table
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* \retval non-zero if successful, zero if not
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*
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* Copies data to specific part of the neighbor table, specified by
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* neighbor and attribute type, and resets timeout for that neighbor.
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* If neighbor was not found, this will add a new neighbor to the table.
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*/
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int neighbor_attr_set_data(struct neighbor_attr *, const rimeaddr_t * addr,
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void *data);
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/**
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* \brief Set global lifetime of neighbor entries.
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* \param Lifetime in seconds. If 0, entries will not time out
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*/
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void neighbor_attr_set_timeout(uint16_t);
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/**
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* \brief get global lifetime of neighbor entries. If 0, entries will not time out
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*/
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uint16_t neighbor_attr_get_timeout(void);
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/**
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* \brief reset timeout of a neighbor to prevent it from being removed
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*/
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void neighbor_attr_tick(const rimeaddr_t *);
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#endif /* NEIGHBORATTR_H_ */
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