425 lines
18 KiB
C
425 lines
18 KiB
C
/*-
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* Copyright (c) 2001 Atsushi Onoe
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* Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NET80211_IEEE80211_NODE_H_
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#define _NET80211_IEEE80211_NODE_H_
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#include <net80211/ieee80211_ioctl.h> /* for ieee80211_nodestats */
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#include <net80211/ieee80211_ht.h> /* for aggregation state */
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/*
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* Each ieee80211com instance has a single timer that fires every
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* IEEE80211_INACT_WAIT seconds to handle "inactivity processing".
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* This is used to do node inactivity processing when operating
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* as an AP or in adhoc mode. For inactivity processing each node
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* has a timeout set in it's ni_inact field that is decremented
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* on each timeout and the node is reclaimed when the counter goes
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* to zero. We use different inactivity timeout values depending
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* on whether the node is associated and authorized (either by
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* 802.1x or open/shared key authentication) or associated but yet
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* to be authorized. The latter timeout is shorter to more aggressively
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* reclaim nodes that leave part way through the 802.1x exchange.
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*/
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#define IEEE80211_INACT_WAIT 15 /* inactivity interval (secs) */
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#define IEEE80211_INACT_INIT (30/IEEE80211_INACT_WAIT) /* initial */
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#define IEEE80211_INACT_AUTH (180/IEEE80211_INACT_WAIT) /* associated but not authorized */
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#define IEEE80211_INACT_RUN (300/IEEE80211_INACT_WAIT) /* authorized */
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#define IEEE80211_INACT_PROBE (30/IEEE80211_INACT_WAIT) /* probe */
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#define IEEE80211_INACT_SCAN (300/IEEE80211_INACT_WAIT) /* scanned */
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#define IEEE80211_TRANS_WAIT 2 /* mgt frame tx timer (secs) */
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/* threshold for aging overlapping non-ERP bss */
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#define IEEE80211_NONERP_PRESENT_AGE msecs_to_ticks(60*1000)
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#define IEEE80211_NODE_HASHSIZE 32
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/* simple hash is enough for variation of macaddr */
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#define IEEE80211_NODE_HASH(addr) \
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(((const uint8_t *)(addr))[IEEE80211_ADDR_LEN - 1] % \
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IEEE80211_NODE_HASHSIZE)
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struct ieee80211_node_table;
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struct ieee80211com;
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struct ieee80211vap;
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/*
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* Information element ``blob''. We use this structure
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* to capture management frame payloads that need to be
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* retained. Information elemnts within the payload that
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* we need to consult have references recorded.
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*/
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struct ieee80211_ies {
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/* the following are either NULL or point within data */
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uint8_t *wpa_ie; /* captured WPA ie */
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uint8_t *rsn_ie; /* captured RSN ie */
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uint8_t *wme_ie; /* captured WME ie */
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uint8_t *ath_ie; /* captured Atheros ie */
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uint8_t *htcap_ie; /* captured HTCAP ie */
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uint8_t *htinfo_ie; /* captured HTINFO ie */
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uint8_t *tdma_ie; /* captured TDMA ie */
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/* NB: these must be the last members of this structure */
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uint8_t *data; /* frame data > 802.11 header */
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int len; /* data size in bytes */
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};
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/*
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* Node specific information. Note that drivers are expected
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* to derive from this structure to add device-specific per-node
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* state. This is done by overriding the ic_node_* methods in
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* the ieee80211com structure.
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*/
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struct ieee80211_node {
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struct ieee80211vap *ni_vap; /* associated vap */
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struct ieee80211com *ni_ic; /* copy from vap to save deref*/
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struct ieee80211_node_table *ni_table; /* NB: may be NULL */
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TAILQ_ENTRY(ieee80211_node) ni_list; /* list of all nodes */
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LIST_ENTRY(ieee80211_node) ni_hash; /* hash collision list */
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u_int ni_refcnt; /* count of held references */
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u_int ni_scangen; /* gen# for timeout scan */
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u_int ni_flags;
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#define IEEE80211_NODE_AUTH 0x000001 /* authorized for data */
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#define IEEE80211_NODE_QOS 0x000002 /* QoS enabled */
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#define IEEE80211_NODE_ERP 0x000004 /* ERP enabled */
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/* NB: this must have the same value as IEEE80211_FC1_PWR_MGT */
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#define IEEE80211_NODE_PWR_MGT 0x000010 /* power save mode enabled */
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#define IEEE80211_NODE_AREF 0x000020 /* authentication ref held */
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#define IEEE80211_NODE_HT 0x000040 /* HT enabled */
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#define IEEE80211_NODE_HTCOMPAT 0x000080 /* HT setup w/ vendor OUI's */
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#define IEEE80211_NODE_WPS 0x000100 /* WPS association */
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#define IEEE80211_NODE_TSN 0x000200 /* TSN association */
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#define IEEE80211_NODE_AMPDU_RX 0x000400 /* AMPDU rx enabled */
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#define IEEE80211_NODE_AMPDU_TX 0x000800 /* AMPDU tx enabled */
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#define IEEE80211_NODE_MIMO_PS 0x001000 /* MIMO power save enabled */
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#define IEEE80211_NODE_MIMO_RTS 0x002000 /* send RTS in MIMO PS */
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#define IEEE80211_NODE_RIFS 0x004000 /* RIFS enabled */
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#define IEEE80211_NODE_SGI20 0x008000 /* Short GI in HT20 enabled */
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#define IEEE80211_NODE_SGI40 0x010000 /* Short GI in HT40 enabled */
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#define IEEE80211_NODE_ASSOCID 0x020000 /* xmit requires associd */
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uint16_t ni_associd; /* association ID */
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uint16_t ni_vlan; /* vlan tag */
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uint16_t ni_txpower; /* current transmit power */
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uint8_t ni_authmode; /* authentication algorithm */
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uint8_t ni_ath_flags; /* Atheros feature flags */
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/* NB: These must have the same values as IEEE80211_ATHC_* */
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#define IEEE80211_NODE_TURBOP 0x0001 /* Turbo prime enable */
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#define IEEE80211_NODE_COMP 0x0002 /* Compresssion enable */
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#define IEEE80211_NODE_FF 0x0004 /* Fast Frame capable */
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#define IEEE80211_NODE_XR 0x0008 /* Atheros WME enable */
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#define IEEE80211_NODE_AR 0x0010 /* AR capable */
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#define IEEE80211_NODE_BOOST 0x0080 /* Dynamic Turbo boosted */
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uint16_t ni_ath_defkeyix;/* Atheros def key index */
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const struct ieee80211_txparam *ni_txparms;
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uint32_t ni_jointime; /* time of join (secs) */
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uint32_t *ni_challenge; /* shared-key challenge */
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struct ieee80211_ies ni_ies; /* captured ie's */
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/* tx seq per-tid */
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uint16_t ni_txseqs[IEEE80211_TID_SIZE];
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/* rx seq previous per-tid*/
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uint16_t ni_rxseqs[IEEE80211_TID_SIZE];
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uint32_t ni_rxfragstamp; /* time stamp of last rx frag */
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struct mbuf *ni_rxfrag[3]; /* rx frag reassembly */
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struct ieee80211_key ni_ucastkey; /* unicast key */
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/* hardware */
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uint32_t ni_rstamp; /* recv timestamp */
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uint32_t ni_avgrssi; /* recv ssi state */
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int8_t ni_noise; /* noise floor */
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/* header */
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uint8_t ni_macaddr[IEEE80211_ADDR_LEN];
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uint8_t ni_bssid[IEEE80211_ADDR_LEN];
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/* beacon, probe response */
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union {
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uint8_t data[8];
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u_int64_t tsf;
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} ni_tstamp; /* from last rcv'd beacon */
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uint16_t ni_intval; /* beacon interval */
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uint16_t ni_capinfo; /* capabilities */
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uint8_t ni_esslen;
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uint8_t ni_essid[IEEE80211_NWID_LEN];
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struct ieee80211_rateset ni_rates; /* negotiated rate set */
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struct ieee80211_channel *ni_chan;
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uint16_t ni_fhdwell; /* FH only */
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uint8_t ni_fhindex; /* FH only */
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uint16_t ni_erp; /* ERP from beacon/probe resp */
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uint16_t ni_timoff; /* byte offset to TIM ie */
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uint8_t ni_dtim_period; /* DTIM period */
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uint8_t ni_dtim_count; /* DTIM count for last bcn */
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/* 11n state */
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uint16_t ni_htcap; /* HT capabilities */
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uint8_t ni_htparam; /* HT params */
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uint8_t ni_htctlchan; /* HT control channel */
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uint8_t ni_ht2ndchan; /* HT 2nd channel */
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uint8_t ni_htopmode; /* HT operating mode */
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uint8_t ni_htstbc; /* HT */
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uint8_t ni_chw; /* negotiated channel width */
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struct ieee80211_htrateset ni_htrates; /* negotiated ht rate set */
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struct ieee80211_tx_ampdu ni_tx_ampdu[WME_NUM_AC];
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struct ieee80211_rx_ampdu ni_rx_ampdu[WME_NUM_TID];
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/* others */
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short ni_inact; /* inactivity mark count */
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short ni_inact_reload;/* inactivity reload value */
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int ni_txrate; /* legacy rate/MCS */
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struct ieee80211_psq ni_psq; /* power save queue */
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struct ieee80211_nodestats ni_stats; /* per-node statistics */
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struct ieee80211vap *ni_wdsvap; /* associated WDS vap */
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/* XXX move to vap? */
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struct ifqueue ni_wdsq; /* wds pending queue */
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};
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MALLOC_DECLARE(M_80211_NODE);
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MALLOC_DECLARE(M_80211_NODE_IE);
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#define IEEE80211_NODE_ATH (IEEE80211_NODE_FF | IEEE80211_NODE_TURBOP)
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#define IEEE80211_NODE_AMPDU \
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(IEEE80211_NODE_AMPDU_RX | IEEE80211_NODE_AMPDU_TX)
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#define IEEE80211_NODE_HT_ALL \
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(IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT | \
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IEEE80211_NODE_AMPDU | IEEE80211_NODE_MIMO_PS | \
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IEEE80211_NODE_MIMO_RTS | IEEE80211_NODE_RIFS | \
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IEEE80211_NODE_SGI20 | IEEE80211_NODE_SGI40)
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#define IEEE80211_NODE_BITS \
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"\20\1AUTH\2QOS\3ERP\5PWR_MGT\6AREF\7HT\10HTCOMPAT\11WPS\12TSN" \
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"\13AMPDU_RX\14AMPDU_TX\15MIMO_PS\16MIMO_RTS\17RIFS\20SGI20\21SGI40" \
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"\22ASSOCID"
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#define IEEE80211_NODE_AID(ni) IEEE80211_AID(ni->ni_associd)
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#define IEEE80211_NODE_STAT(ni,stat) (ni->ni_stats.ns_##stat++)
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#define IEEE80211_NODE_STAT_ADD(ni,stat,v) (ni->ni_stats.ns_##stat += v)
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#define IEEE80211_NODE_STAT_SET(ni,stat,v) (ni->ni_stats.ns_##stat = v)
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/*
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* Filtered rssi calculation support. The receive rssi is maintained
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* as an average over the last 10 frames received using a low pass filter
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* (all frames for now, possibly need to be more selective). Calculations
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* are designed such that a good compiler can optimize them. The avg
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* rssi state should be initialized to IEEE80211_RSSI_DUMMY_MARKER and
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* each sample incorporated with IEEE80211_RSSI_LPF. Use IEEE80211_RSSI_GET
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* to extract the current value.
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*
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* Note that we assume rssi data are in the range [-127..127] and we
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* discard values <-20. This is consistent with assumptions throughout
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* net80211 that signal strength data are in .5 dBm units relative to
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* the current noise floor (linear, not log).
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*/
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#define IEEE80211_RSSI_LPF_LEN 10
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#define IEEE80211_RSSI_DUMMY_MARKER 127
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/* NB: pow2 to optimize out * and / */
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#define IEEE80211_RSSI_EP_MULTIPLIER (1<<7)
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#define IEEE80211_RSSI_IN(x) ((x) * IEEE80211_RSSI_EP_MULTIPLIER)
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#define _IEEE80211_RSSI_LPF(x, y, len) \
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(((x) != IEEE80211_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y))
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#define IEEE80211_RSSI_LPF(x, y) do { \
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if ((y) >= -20) { \
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x = _IEEE80211_RSSI_LPF((x), IEEE80211_RSSI_IN((y)), \
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IEEE80211_RSSI_LPF_LEN); \
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} \
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} while (0)
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#define IEEE80211_RSSI_EP_RND(x, mul) \
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((((x) % (mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
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#define IEEE80211_RSSI_GET(x) \
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IEEE80211_RSSI_EP_RND(x, IEEE80211_RSSI_EP_MULTIPLIER)
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static __inline struct ieee80211_node *
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ieee80211_ref_node(struct ieee80211_node *ni)
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{
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ieee80211_node_incref(ni);
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return ni;
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}
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static __inline void
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ieee80211_unref_node(struct ieee80211_node **ni)
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{
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ieee80211_node_decref(*ni);
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*ni = NULL; /* guard against use */
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}
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struct ieee80211com;
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void ieee80211_node_attach(struct ieee80211com *);
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void ieee80211_node_lateattach(struct ieee80211com *);
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void ieee80211_node_detach(struct ieee80211com *);
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void ieee80211_node_vattach(struct ieee80211vap *);
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void ieee80211_node_latevattach(struct ieee80211vap *);
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void ieee80211_node_vdetach(struct ieee80211vap *);
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static __inline int
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ieee80211_node_is_authorized(const struct ieee80211_node *ni)
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{
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return (ni->ni_flags & IEEE80211_NODE_AUTH);
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}
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void ieee80211_node_authorize(struct ieee80211_node *);
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void ieee80211_node_unauthorize(struct ieee80211_node *);
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void ieee80211_node_set_chan(struct ieee80211_node *,
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struct ieee80211_channel *);
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void ieee80211_create_ibss(struct ieee80211vap*, struct ieee80211_channel *);
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void ieee80211_reset_bss(struct ieee80211vap *);
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void ieee80211_sync_curchan(struct ieee80211com *);
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void ieee80211_setcurchan(struct ieee80211com *, struct ieee80211_channel *);
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int ieee80211_ibss_merge(struct ieee80211_node *);
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struct ieee80211_scan_entry;
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int ieee80211_sta_join(struct ieee80211vap *, struct ieee80211_channel *,
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const struct ieee80211_scan_entry *);
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void ieee80211_sta_leave(struct ieee80211_node *);
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void ieee80211_node_deauth(struct ieee80211_node *, int);
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int ieee80211_ies_init(struct ieee80211_ies *, const uint8_t *, int);
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void ieee80211_ies_cleanup(struct ieee80211_ies *);
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void ieee80211_ies_expand(struct ieee80211_ies *);
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#define ieee80211_ies_setie(_ies, _ie, _off) do { \
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(_ies)._ie = (_ies).data + (_off); \
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} while (0)
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/*
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* Table of ieee80211_node instances. Each ieee80211com
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* has one that holds association stations (when operating
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* as an ap) or neighbors (in ibss mode).
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*
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* XXX embed this in ieee80211com instead of indirect?
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*/
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struct ieee80211_node_table {
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struct ieee80211com *nt_ic; /* back reference */
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ieee80211_node_lock_t nt_nodelock; /* on node table */
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TAILQ_HEAD(, ieee80211_node) nt_node; /* information of all nodes */
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LIST_HEAD(, ieee80211_node) nt_hash[IEEE80211_NODE_HASHSIZE];
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struct ieee80211_node **nt_keyixmap; /* key ix -> node map */
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int nt_keyixmax; /* keyixmap size */
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const char *nt_name; /* table name for debug msgs */
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ieee80211_scan_lock_t nt_scanlock; /* on nt_scangen */
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u_int nt_scangen; /* gen# for iterators */
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int nt_inact_init; /* initial node inact setting */
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};
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struct ieee80211_node *ieee80211_alloc_node(struct ieee80211_node_table *,
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struct ieee80211vap *,
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const uint8_t macaddr[IEEE80211_ADDR_LEN]);
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struct ieee80211_node *ieee80211_tmp_node(struct ieee80211vap *,
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const uint8_t macaddr[IEEE80211_ADDR_LEN]);
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struct ieee80211_node *ieee80211_dup_bss(struct ieee80211vap *,
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const uint8_t macaddr[IEEE80211_ADDR_LEN]);
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struct ieee80211_node *ieee80211_node_create_wds(struct ieee80211vap *,
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const uint8_t bssid[IEEE80211_ADDR_LEN],
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struct ieee80211_channel *);
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#ifdef IEEE80211_DEBUG_REFCNT
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void ieee80211_free_node_debug(struct ieee80211_node *,
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const char *func, int line);
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struct ieee80211_node *ieee80211_find_node_locked_debug(
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struct ieee80211_node_table *,
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const uint8_t macaddr[IEEE80211_ADDR_LEN],
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const char *func, int line);
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struct ieee80211_node *ieee80211_find_node_debug(struct ieee80211_node_table *,
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const uint8_t macaddr[IEEE80211_ADDR_LEN],
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const char *func, int line);
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struct ieee80211_node *ieee80211_find_vap_node_locked_debug(
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struct ieee80211_node_table *,
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const struct ieee80211vap *vap,
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const uint8_t macaddr[IEEE80211_ADDR_LEN],
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const char *func, int line);
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struct ieee80211_node *ieee80211_find_vap_node_debug(
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struct ieee80211_node_table *,
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const struct ieee80211vap *vap,
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const uint8_t macaddr[IEEE80211_ADDR_LEN],
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const char *func, int line);
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struct ieee80211_node * ieee80211_find_rxnode_debug(struct ieee80211com *,
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const struct ieee80211_frame_min *,
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const char *func, int line);
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struct ieee80211_node * ieee80211_find_rxnode_withkey_debug(
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struct ieee80211com *,
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const struct ieee80211_frame_min *, uint16_t keyix,
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const char *func, int line);
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struct ieee80211_node *ieee80211_find_txnode_debug(struct ieee80211vap *,
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const uint8_t *,
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const char *func, int line);
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#define ieee80211_free_node(ni) \
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ieee80211_free_node_debug(ni, __func__, __LINE__)
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#define ieee80211_find_node_locked(nt, mac) \
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ieee80211_find_node_locked_debug(nt, mac, __func__, __LINE__)
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#define ieee80211_find_node(nt, mac) \
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ieee80211_find_node_debug(nt, mac, __func__, __LINE__)
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#define ieee80211_find_vap_node_locked(nt, vap, mac) \
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ieee80211_find_vap_node_locked_debug(nt, vap, mac, __func__, __LINE__)
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#define ieee80211_find_vap_node(nt, vap, mac) \
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ieee80211_find_vap_node_debug(nt, vap, mac, __func__, __LINE__)
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#define ieee80211_find_rxnode(ic, wh) \
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ieee80211_find_rxnode_debug(ic, wh, __func__, __LINE__)
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#define ieee80211_find_rxnode_withkey(ic, wh, keyix) \
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ieee80211_find_rxnode_withkey_debug(ic, wh, keyix, __func__, __LINE__)
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#define ieee80211_find_txnode(vap, mac) \
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ieee80211_find_txnode_debug(vap, mac, __func__, __LINE__)
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#else
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void ieee80211_free_node(struct ieee80211_node *);
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struct ieee80211_node *ieee80211_find_node_locked(struct ieee80211_node_table *,
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const uint8_t macaddr[IEEE80211_ADDR_LEN]);
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struct ieee80211_node *ieee80211_find_node(struct ieee80211_node_table *,
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const uint8_t macaddr[IEEE80211_ADDR_LEN]);
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struct ieee80211_node *ieee80211_find_vap_node_locked(
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struct ieee80211_node_table *, const struct ieee80211vap *,
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const uint8_t macaddr[IEEE80211_ADDR_LEN]);
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struct ieee80211_node *ieee80211_find_vap_node(
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struct ieee80211_node_table *, const struct ieee80211vap *,
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const uint8_t macaddr[IEEE80211_ADDR_LEN]);
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struct ieee80211_node * ieee80211_find_rxnode(struct ieee80211com *,
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const struct ieee80211_frame_min *);
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struct ieee80211_node * ieee80211_find_rxnode_withkey(struct ieee80211com *,
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const struct ieee80211_frame_min *, uint16_t keyix);
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struct ieee80211_node *ieee80211_find_txnode(struct ieee80211vap *,
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const uint8_t macaddr[IEEE80211_ADDR_LEN]);
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#endif
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int ieee80211_node_delucastkey(struct ieee80211_node *);
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void ieee80211_node_timeout(void *arg);
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typedef void ieee80211_iter_func(void *, struct ieee80211_node *);
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void ieee80211_iterate_nodes(struct ieee80211_node_table *,
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ieee80211_iter_func *, void *);
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void ieee80211_notify_erp(struct ieee80211com *);
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void ieee80211_dump_node(struct ieee80211_node_table *,
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struct ieee80211_node *);
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void ieee80211_dump_nodes(struct ieee80211_node_table *);
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struct ieee80211_node *ieee80211_fakeup_adhoc_node(struct ieee80211vap *,
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const uint8_t macaddr[IEEE80211_ADDR_LEN]);
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struct ieee80211_scanparams;
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void ieee80211_init_neighbor(struct ieee80211_node *,
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const struct ieee80211_frame *,
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const struct ieee80211_scanparams *);
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struct ieee80211_node *ieee80211_add_neighbor(struct ieee80211vap *,
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const struct ieee80211_frame *,
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const struct ieee80211_scanparams *);
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void ieee80211_node_join(struct ieee80211_node *,int);
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void ieee80211_node_leave(struct ieee80211_node *);
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int8_t ieee80211_getrssi(struct ieee80211vap *);
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void ieee80211_getsignal(struct ieee80211vap *, int8_t *, int8_t *);
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#endif /* _NET80211_IEEE80211_NODE_H_ */
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