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95 lines
3.4 KiB
C
95 lines
3.4 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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* 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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* Declarations for the neighbor information module.
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*
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* \author Nicolas Tsiftes <nvt@sics.se>
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*/
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#ifndef NEIGHBOR_INFO_H
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#define NEIGHBOR_INFO_H
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#include "net/neighbor-attr.h"
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#include "net/rime.h"
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/* ETX_DIVISOR is the value that a fix-point representation of the ETX
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should be divided by in order to obtain the integer representation. */
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#define NEIGHBOR_INFO_ETX_DIVISOR 16
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/* Macros for converting between a fix-point representation of the ETX
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and a integer representation. */
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#define NEIGHBOR_INFO_ETX2FIX(etx) ((etx) * NEIGHBOR_INFO_ETX_DIVISOR)
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#define NEIGHBOR_INFO_FIX2ETX(fix) ((fix) / NEIGHBOR_INFO_ETX_DIVISOR)
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typedef void (*neighbor_info_subscriber_t)(const rimeaddr_t *, int known, int etx);
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typedef uint8_t link_metric_t;
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NEIGHBOR_ATTRIBUTE_DECLARE(attr_etx);
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NEIGHBOR_ATTRIBUTE_DECLARE(attr_timestamp);
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/**
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* Notify the neighbor information module about the status of
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* a packet transmission.
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*
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* \param status The MAC status code for this packet.
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*
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* \param numtx The amount of transmissions made for this packet.
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*/
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void neighbor_info_packet_sent(int status, int numtx);
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/**
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* Notify the neighbor information module that a packet was received.
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*
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* \param status The MAC status code for this packet.
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*
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* \param numtx The amount of transmissions made for this packet.
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*/
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void neighbor_info_packet_received(void);
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/**
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* Subscribe to notifications of changed neighbor information.
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*
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* \return Returns 1 if the subscription was successful, and 0 if not.
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*/
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int neighbor_info_subscribe(neighbor_info_subscriber_t);
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/**
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* Get link metric value for a specific neighbor.
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*
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* \return Returns link metric if the neighbor exists, and 0 if not.
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*/
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link_metric_t neighbor_info_get_metric(const rimeaddr_t *addr);
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#endif /* NEIGHBOR_INFO_H */
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