66 lines
2.9 KiB
C
66 lines
2.9 KiB
C
/*
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* Copyright (c) 2015, 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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*
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* Authors: Simon Duquennoy <simonduq@sics.se>
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*/
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#ifndef LINK_STATS_H_
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#define LINK_STATS_H_
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#include "core/net/linkaddr.h"
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/* ETX fixed point divisor. 128 is the value used by RPL (RFC 6551 and RFC 6719) */
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#ifdef LINK_STATS_CONF_ETX_DIVISOR
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#define LINK_STATS_ETX_DIVISOR LINK_STATS_CONF_ETX_DIVISOR
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#else /* LINK_STATS_CONF_ETX_DIVISOR */
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#define LINK_STATS_ETX_DIVISOR 128
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#endif /* LINK_STATS_CONF_ETX_DIVISOR */
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/* All statistics of a given link */
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struct link_stats {
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uint16_t etx; /* ETX using ETX_DIVISOR as fixed point divisor */
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int16_t rssi; /* RSSI (received signal strength) */
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uint8_t freshness; /* Freshness of the statistics */
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clock_time_t last_tx_time; /* Last Tx timestamp */
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};
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/* Returns the neighbor's link statistics */
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const struct link_stats *link_stats_from_lladdr(const linkaddr_t *lladdr);
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/* Are the statistics fresh? */
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int link_stats_is_fresh(const struct link_stats *stats);
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/* Initializes link-stats module */
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void link_stats_init(void);
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/* Packet sent callback. Updates statistics for transmissions on a given link */
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void link_stats_packet_sent(const linkaddr_t *lladdr, int status, int numtx);
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/* Packet input callback. Updates statistics for receptions on a given link */
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void link_stats_input_callback(const linkaddr_t *lladdr);
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#endif /* LINK_STATS_H_ */
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