fe267a5590
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
74 lines
2.9 KiB
C
74 lines
2.9 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: ieee80211_rssadapt.h,v 1.4 2005/02/26 22:45:09 perry Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2003, 2004 David Young. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions 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
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of David Young may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY David Young ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL David
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* Young BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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
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* OF SUCH DAMAGE.
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*/
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#ifndef _NET80211_IEEE80211_RSSADAPT_H_
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#define _NET80211_IEEE80211_RSSADAPT_H_
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/* Data-rate adaptation loosely based on "Link Adaptation Strategy
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* for IEEE 802.11 WLAN via Received Signal Strength Measurement"
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* by Javier del Prado Pavon and Sunghyun Choi.
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*/
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/* Buckets for frames 0-128 bytes long, 129-1024, 1025-maximum. */
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#define IEEE80211_RSSADAPT_BKTS 3
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#define IEEE80211_RSSADAPT_BKT0 128
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#define IEEE80211_RSSADAPT_BKTPOWER 3 /* 2**_BKTPOWER */
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struct ieee80211_rssadapt {
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const struct ieee80211vap *vap;
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int interval; /* update interval (ticks) */
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};
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struct ieee80211_rssadapt_node {
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struct ieee80211_rssadapt *ra_rs; /* backpointer */
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struct ieee80211_rateset ra_rates; /* negotiated rates */
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int ra_rix; /* current rate index */
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int ra_ticks; /* time of last update */
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int ra_last_raise; /* time of last rate raise */
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int ra_raise_interval; /* rate raise time threshold */
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/* Tx failures in this update interval */
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uint32_t ra_nfail;
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/* Tx successes in this update interval */
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uint32_t ra_nok;
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/* exponential average packets/second */
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uint32_t ra_pktrate;
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/* RSSI threshold for each Tx rate */
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uint16_t ra_rate_thresh[IEEE80211_RSSADAPT_BKTS]
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[IEEE80211_RATE_SIZE];
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};
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#define IEEE80211_RSSADAPT_SUCCESS 1
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#define IEEE80211_RSSADAPT_FAILURE 0
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#endif /* _NET80211_IEEE80211_RSSADAPT_H_ */
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