contiki/core/net/neighbor-info.h

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/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* 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.
*
* $Id: neighbor-info.h,v 1.4 2010/10/22 13:50:13 nvt-se Exp $
*/
/**
* \file
* Declarations for the neighbor information module.
*
* \author Nicolas Tsiftes <nvt@sics.se>
*/
#ifndef NEIGHBOR_INFO_H
#define NEIGHBOR_INFO_H
#include "net/rime.h"
/* ETX_DIVISOR is the value that a fix-point representation of the ETX
should be divided by in order to obtain the integer representation. */
#define NEIGHBOR_INFO_ETX_DIVISOR 16
/* Macros for converting between a fix-point representation of the ETX
and a integer representation. */
#define NEIGHBOR_INFO_ETX2FIX(etx) ((etx) * NEIGHBOR_INFO_ETX_DIVISOR)
#define NEIGHBOR_INFO_FIX2ETX(fix) ((fix) / NEIGHBOR_INFO_ETX_DIVISOR)
typedef void (*neighbor_info_subscriber_t)(const rimeaddr_t *, int known, int etx);
typedef uint8_t link_metric_t;
/**
* Notify the neighbor information module about the status of
* a packet transmission.
*
* \param status The MAC status code for this packet.
*
* \param numtx The amount of transmissions made for this packet.
*/
void neighbor_info_packet_sent(int status, int numtx);
/**
* Notify the neighbor information module that a packet was received.
*
* \param status The MAC status code for this packet.
*
* \param numtx The amount of transmissions made for this packet.
*/
void neighbor_info_packet_received(void);
/**
* Subscribe to notifications of changed neighbor information.
*
* \return Returns 1 if the subscription was successful, and 0 if not.
*/
int neighbor_info_subscribe(neighbor_info_subscriber_t);
/**
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* Get link metric value for a specific neighbor.
*
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* \return Returns link metric if the neighbor exists, and 0 if not.
*/
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link_metric_t neighbor_info_get_metric(const rimeaddr_t *addr);
#endif /* NEIGHBOR_INFO_H */