text: /*-
   * Copyright (c) 2001 Atsushi Onoe
   * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
   * 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.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
   *
   * $FreeBSD: head/sys/net80211/ieee80211_node.h 206358 2010-04-07 15:29:13Z rpaulo $
   */
  #ifndef _NET80211_IEEE80211_NODE_H_
  #define _NET80211_IEEE80211_NODE_H_
  
  #include <netproto/802_11/ieee80211_ioctl.h>		/* for ieee80211_nodestats */
  #include <netproto/802_11/ieee80211_ht.h>		/* for aggregation state */
  
  /*
   * Each ieee80211com instance has a single timer that fires every
   * IEEE80211_INACT_WAIT seconds to handle "inactivity processing".
   * This is used to do node inactivity processing when operating
   * as an AP, adhoc or mesh mode.  For inactivity processing each node
   * has a timeout set in it's ni_inact field that is decremented
   * on each timeout and the node is reclaimed when the counter goes
   * to zero.  We use different inactivity timeout values depending
   * on whether the node is associated and authorized (either by
   * 802.1x or open/shared key authentication) or associated but yet
   * to be authorized.  The latter timeout is shorter to more aggressively
   * reclaim nodes that leave part way through the 802.1x exchange.
   */
  #define	IEEE80211_INACT_WAIT	15		/* inactivity interval (secs) */
  #define	IEEE80211_INACT_INIT	(30/IEEE80211_INACT_WAIT)	/* initial */
  #define	IEEE80211_INACT_AUTH	(180/IEEE80211_INACT_WAIT)	/* associated but not authorized */
  #define	IEEE80211_INACT_RUN	(300/IEEE80211_INACT_WAIT)	/* authorized */
  #define	IEEE80211_INACT_PROBE	(30/IEEE80211_INACT_WAIT)	/* probe */
  #define	IEEE80211_INACT_SCAN	(300/IEEE80211_INACT_WAIT)	/* scanned */
  
  #define	IEEE80211_TRANS_WAIT 	2		/* mgt frame tx timer (secs) */
  
  /* threshold for aging overlapping non-ERP bss */
  #define	IEEE80211_NONERP_PRESENT_AGE	msecs_to_ticks(60*1000)
  
  #define	IEEE80211_NODE_HASHSIZE	32		/* NB: hash size must be pow2 */
  /* simple hash is enough for variation of macaddr */
  #define	IEEE80211_NODE_HASH(ic, addr)	\
  	(((const uint8_t *)(addr))[IEEE80211_ADDR_LEN - 1] % \
  		IEEE80211_NODE_HASHSIZE)
  
  struct ieee80211_node_table;
  struct ieee80211com;
  struct ieee80211vap;
  
  /*
   * Information element ``blob''.  We use this structure
   * to capture management frame payloads that need to be
   * retained.  Information elements within the payload that
   * we need to consult have references recorded.
   */
  struct ieee80211_ies {
  	/* the following are either NULL or point within data */
  	uint8_t	*wpa_ie;	/* captured WPA ie */
  	uint8_t	*rsn_ie;	/* captured RSN ie */
  	uint8_t	*wme_ie;	/* captured WME ie */
  	uint8_t	*ath_ie;	/* captured Atheros ie */
  	uint8_t	*htcap_ie;	/* captured HTCAP ie */
  	uint8_t	*htinfo_ie;	/* captured HTINFO ie */
  	uint8_t	*tdma_ie;	/* captured TDMA ie */
  	uint8_t *meshid_ie;	/* captured MESH ID ie */
  	uint8_t	*spare[4];
  	/* NB: these must be the last members of this structure */
  	uint8_t	*data;		/* frame data > 802.11 header */
  	int	len;		/* data size in bytes */
  };
  
  /*
   * 802.11s (Mesh) Peer Link FSM state.
   */
  enum ieee80211_mesh_mlstate {
  	IEEE80211_NODE_MESH_IDLE	= 0,
  	IEEE80211_NODE_MESH_OPENSNT	= 1,	/* open frame sent */
  	IEEE80211_NODE_MESH_OPENRCV	= 2,	/* open frame received */
  	IEEE80211_NODE_MESH_CONFIRMRCV	= 3,	/* confirm frame received */
  	IEEE80211_NODE_MESH_ESTABLISHED	= 4,	/* link established */
  	IEEE80211_NODE_MESH_HOLDING	= 5,	/* link closing */
  };
  #define	IEEE80211_MESH_MLSTATE_BITS \
  	"\20\1IDLE\2OPENSNT\2OPENRCV\3CONFIRMRCV\4ESTABLISHED\5HOLDING"
  
  /*
   * Node specific information.  Note that drivers are expected
   * to derive from this structure to add device-specific per-node
   * state.  This is done by overriding the ic_node_* methods in
   * the ieee80211com structure.
   */
  struct ieee80211_node {
  	struct ieee80211vap	*ni_vap;	/* associated vap */
  	struct ieee80211com	*ni_ic;		/* copy from vap to save deref*/
  	struct ieee80211_node_table *ni_table;	/* NB: may be NULL */
  	TAILQ_ENTRY(ieee80211_node) ni_list;	/* list of all nodes */
  	LIST_ENTRY(ieee80211_node) ni_hash;	/* hash collision list */
  	u_int			ni_refcnt;	/* count of held references */
  	u_int			ni_scangen;	/* gen# for timeout scan */
  	u_int			ni_flags;
  #define	IEEE80211_NODE_AUTH	0x000001	/* authorized for data */
  #define	IEEE80211_NODE_QOS	0x000002	/* QoS enabled */
  #define	IEEE80211_NODE_ERP	0x000004	/* ERP enabled */
  /* NB: this must have the same value as IEEE80211_FC1_PWR_MGT */
  #define	IEEE80211_NODE_PWR_MGT	0x000010	/* power save mode enabled */
  #define	IEEE80211_NODE_AREF	0x000020	/* authentication ref held */
  #define	IEEE80211_NODE_HT	0x000040	/* HT enabled */
  #define	IEEE80211_NODE_HTCOMPAT	0x000080	/* HT setup w/ vendor OUI's */
  #define	IEEE80211_NODE_WPS	0x000100	/* WPS association */
  #define	IEEE80211_NODE_TSN	0x000200	/* TSN association */
  #define	IEEE80211_NODE_AMPDU_RX	0x000400	/* AMPDU rx enabled */
  #define	IEEE80211_NODE_AMPDU_TX	0x000800	/* AMPDU tx enabled */
  #define	IEEE80211_NODE_MIMO_PS	0x001000	/* MIMO power save enabled */
  #define	IEEE80211_NODE_MIMO_RTS	0x002000	/* send RTS in MIMO PS */
  #define	IEEE80211_NODE_RIFS	0x004000	/* RIFS enabled */
  #define	IEEE80211_NODE_SGI20	0x008000	/* Short GI in HT20 enabled */
  #define	IEEE80211_NODE_SGI40	0x010000	/* Short GI in HT40 enabled */
  #define	IEEE80211_NODE_ASSOCID	0x020000	/* xmit requires associd */
  #define	IEEE80211_NODE_AMSDU_RX	0x040000	/* AMSDU rx enabled */
  #define	IEEE80211_NODE_AMSDU_TX	0x080000	/* AMSDU tx enabled */
  	uint16_t		ni_associd;	/* association ID */
  	uint16_t		ni_vlan;	/* vlan tag */
  	uint16_t		ni_txpower;	/* current transmit power */
  	uint8_t			ni_authmode;	/* authentication algorithm */
  	uint8_t			ni_ath_flags;	/* Atheros feature flags */
  	/* NB: These must have the same values as IEEE80211_ATHC_* */
  #define IEEE80211_NODE_TURBOP	0x0001		/* Turbo prime enable */
  #define IEEE80211_NODE_COMP	0x0002		/* Compresssion enable */
  #define IEEE80211_NODE_FF	0x0004          /* Fast Frame capable */
  #define IEEE80211_NODE_XR	0x0008		/* Atheros WME enable */
  #define IEEE80211_NODE_AR	0x0010		/* AR capable */
  #define IEEE80211_NODE_BOOST	0x0080		/* Dynamic Turbo boosted */
  	uint16_t		ni_ath_defkeyix;/* Atheros def key index */
  	const struct ieee80211_txparam *ni_txparms;
  	time_t			ni_jointime;	/* time of join (time_uptime) */
  	uint32_t		*ni_challenge;	/* shared-key challenge */
  	struct ieee80211_ies	ni_ies;		/* captured ie's */
  						/* tx seq per-tid */
  	ieee80211_seq		ni_txseqs[IEEE80211_TID_SIZE];
  						/* rx seq previous per-tid*/
  	ieee80211_seq		ni_rxseqs[IEEE80211_TID_SIZE];
  	uint32_t		ni_rxfragstamp;	/* time stamp of last rx frag */
  	struct mbuf		*ni_rxfrag[3];	/* rx frag reassembly */
  	struct ieee80211_key	ni_ucastkey;	/* unicast key */
  
  	/* hardware */
  	uint32_t		ni_avgrssi;	/* recv ssi state */
  	int8_t			ni_noise;	/* noise floor */
  
  	/* header */
  	uint8_t			ni_macaddr[IEEE80211_ADDR_LEN];
  	uint8_t			ni_bssid[IEEE80211_ADDR_LEN];
  
  	/* beacon, probe response */
  	union {
  		uint8_t		data[8];
  		u_int64_t	tsf;
  	} ni_tstamp;				/* from last rcv'd beacon */
  	uint16_t		ni_intval;	/* beacon interval */
  	uint16_t		ni_capinfo;	/* capabilities */
  	uint8_t			ni_esslen;
  	uint8_t			ni_essid[IEEE80211_NWID_LEN];
  	struct ieee80211_rateset ni_rates;	/* negotiated rate set */
  	struct ieee80211_channel *ni_chan;
  	uint16_t		ni_fhdwell;	/* FH only */
  	uint8_t			ni_fhindex;	/* FH only */
  	uint16_t		ni_erp;		/* ERP from beacon/probe resp */
  	uint16_t		ni_timoff;	/* byte offset to TIM ie */
  	uint8_t			ni_dtim_period;	/* DTIM period */
  	uint8_t			ni_dtim_count;	/* DTIM count for last bcn */
  
  	/* 11s state */
  	uint8_t			ni_meshidlen;
  	uint8_t			ni_meshid[IEEE80211_MESHID_LEN];
  	enum ieee80211_mesh_mlstate ni_mlstate;	/* peering management state */
  	uint16_t		ni_mllid;	/* link local ID */
  	uint16_t		ni_mlpid;	/* link peer ID */
  	struct callout		ni_mltimer;	/* link mesh timer */
  	uint8_t			ni_mlrcnt;	/* link mesh retry counter */
  	uint8_t			ni_mltval;	/* link mesh timer value */
  
  	/* 11n state */
  	uint16_t		ni_htcap;	/* HT capabilities */
  	uint8_t			ni_htparam;	/* HT params */
  	uint8_t			ni_htctlchan;	/* HT control channel */
  	uint8_t			ni_ht2ndchan;	/* HT 2nd channel */
  	uint8_t			ni_htopmode;	/* HT operating mode */
  	uint8_t			ni_htstbc;	/* HT */
  	uint8_t			ni_chw;		/* negotiated channel width */
  	struct ieee80211_htrateset ni_htrates;	/* negotiated ht rate set */
  	struct ieee80211_tx_ampdu ni_tx_ampdu[WME_NUM_AC];
  	struct ieee80211_rx_ampdu ni_rx_ampdu[WME_NUM_TID];
  
  	/* others */
  	short			ni_inact;	/* inactivity mark count */
  	short			ni_inact_reload;/* inactivity reload value */
  	int			ni_txrate;	/* legacy rate/MCS */
  	struct ieee80211_psq	ni_psq;		/* power save queue */
  	struct ieee80211_nodestats ni_stats;	/* per-node statistics */
  
  	struct ieee80211vap	*ni_wdsvap;	/* associated WDS vap */
  	void			*ni_rctls;	/* private ratectl state */
  	uint64_t		ni_spare[3];
  };
  MALLOC_DECLARE(M_80211_NODE);
  MALLOC_DECLARE(M_80211_NODE_IE);
  
  #define	IEEE80211_NODE_ATH	(IEEE80211_NODE_FF | IEEE80211_NODE_TURBOP)
  #define	IEEE80211_NODE_AMPDU \
  	(IEEE80211_NODE_AMPDU_RX | IEEE80211_NODE_AMPDU_TX)
  #define	IEEE80211_NODE_AMSDU \
  	(IEEE80211_NODE_AMSDU_RX | IEEE80211_NODE_AMSDU_TX)
  #define	IEEE80211_NODE_HT_ALL \
  	(IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT | \
  	 IEEE80211_NODE_AMPDU | IEEE80211_NODE_AMSDU | \
  	 IEEE80211_NODE_MIMO_PS | IEEE80211_NODE_MIMO_RTS | \
  	 IEEE80211_NODE_RIFS | IEEE80211_NODE_SGI20 | IEEE80211_NODE_SGI40)
  
  #define	IEEE80211_NODE_BITS \
  	"\20\1AUTH\2QOS\3ERP\5PWR_MGT\6AREF\7HT\10HTCOMPAT\11WPS\12TSN" \
  	"\13AMPDU_RX\14AMPDU_TX\15MIMO_PS\16MIMO_RTS\17RIFS\20SGI20\21SGI40" \
  	"\22ASSOCID"
  
  #define	IEEE80211_NODE_AID(ni)	IEEE80211_AID(ni->ni_associd)
  
  #define	IEEE80211_NODE_STAT(ni,stat)	(ni->ni_stats.ns_##stat++)
  #define	IEEE80211_NODE_STAT_ADD(ni,stat,v)	(ni->ni_stats.ns_##stat += v)
  #define	IEEE80211_NODE_STAT_SET(ni,stat,v)	(ni->ni_stats.ns_##stat = v)
  
  /*
   * Filtered rssi calculation support.  The receive rssi is maintained
   * as an average over the last 10 frames received using a low pass filter
   * (all frames for now, possibly need to be more selective).  Calculations
   * are designed such that a good compiler can optimize them.  The avg
   * rssi state should be initialized to IEEE80211_RSSI_DUMMY_MARKER and
   * each sample incorporated with IEEE80211_RSSI_LPF.  Use IEEE80211_RSSI_GET
   * to extract the current value.
   *
   * Note that we assume rssi data are in the range [-127..127] and we
   * discard values <-20.  This is consistent with assumptions throughout
   * net80211 that signal strength data are in .5 dBm units relative to
   * the current noise floor (linear, not log).
   */
  #define IEEE80211_RSSI_LPF_LEN		10
  #define	IEEE80211_RSSI_DUMMY_MARKER	127
  /* NB: pow2 to optimize out * and / */
  #define	IEEE80211_RSSI_EP_MULTIPLIER	(1<<7)
  #define IEEE80211_RSSI_IN(x)		((x) * IEEE80211_RSSI_EP_MULTIPLIER)
  #define _IEEE80211_RSSI_LPF(x, y, len) \
      (((x) != IEEE80211_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y))
  #define IEEE80211_RSSI_LPF(x, y) do {					\
      if ((y) >= -20) {							\
      	x = _IEEE80211_RSSI_LPF((x), IEEE80211_RSSI_IN((y)), 		\
  		IEEE80211_RSSI_LPF_LEN);				\
      }									\
  } while (0)
  #define	IEEE80211_RSSI_EP_RND(x, mul) \
  	((((x) % (mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
  #define	IEEE80211_RSSI_GET(x) \
  	IEEE80211_RSSI_EP_RND(x, IEEE80211_RSSI_EP_MULTIPLIER)
  
  static __inline struct ieee80211_node *
  ieee80211_ref_node(struct ieee80211_node *ni)
  {
  	ieee80211_node_incref(ni);
  	return ni;
  }
  
  static __inline void
  ieee80211_unref_node(struct ieee80211_node **ni)
  {
  	ieee80211_node_decref(*ni);
  	*ni = NULL;			/* guard against use */
  }
  
  struct ieee80211com;
  
  void	ieee80211_node_attach(struct ieee80211com *);
  void	ieee80211_node_lateattach(struct ieee80211com *);
  void	ieee80211_node_detach(struct ieee80211com *);
  void	ieee80211_node_vattach(struct ieee80211vap *);
  void	ieee80211_node_latevattach(struct ieee80211vap *);
  void	ieee80211_node_vdetach(struct ieee80211vap *);
  
  static __inline int
  ieee80211_node_is_authorized(const struct ieee80211_node *ni)
  {
  	return (ni->ni_flags & IEEE80211_NODE_AUTH);
  }
  
  void	ieee80211_node_authorize(struct ieee80211_node *);
  void	ieee80211_node_unauthorize(struct ieee80211_node *);
  
  void	ieee80211_node_setuptxparms(struct ieee80211_node *);
  void	ieee80211_node_set_chan(struct ieee80211_node *,
  		struct ieee80211_channel *);
  void	ieee80211_create_ibss(struct ieee80211vap*, struct ieee80211_channel *);
  void	ieee80211_reset_bss(struct ieee80211vap *);
  void	ieee80211_sync_curchan(struct ieee80211com *);
  void	ieee80211_setupcurchan(struct ieee80211com *,
  	    struct ieee80211_channel *);
  void	ieee80211_setcurchan(struct ieee80211com *, struct ieee80211_channel *);
  int	ieee80211_ibss_merge(struct ieee80211_node *);
  struct ieee80211_scan_entry;
  int	ieee80211_sta_join(struct ieee80211vap *, struct ieee80211_channel *,
  		const struct ieee80211_scan_entry *);
  void	ieee80211_sta_leave(struct ieee80211_node *);
  void	ieee80211_node_deauth(struct ieee80211_node *, int);
  
  int	ieee80211_ies_init(struct ieee80211_ies *, const uint8_t *, int);
  void	ieee80211_ies_cleanup(struct ieee80211_ies *);
  void	ieee80211_ies_expand(struct ieee80211_ies *);
  #define	ieee80211_ies_setie(_ies, _ie, _off) do {		\
  	(_ies)._ie = (_ies).data + (_off);			\
  } while (0)
  
  /*
   * Table of ieee80211_node instances.  Each ieee80211com
   * has one that holds association stations (when operating
   * as an ap) or neighbors (in ibss mode).
   *
   * XXX embed this in ieee80211com instead of indirect?
   */
  struct ieee80211_node_table {
  	struct ieee80211com	*nt_ic;		/* back reference */
  	TAILQ_HEAD(, ieee80211_node) nt_node;	/* information of all nodes */
  	LIST_HEAD(, ieee80211_node) nt_hash[IEEE80211_NODE_HASHSIZE];
  	struct ieee80211_node	**nt_keyixmap;	/* key ix -> node map */
  	int			nt_keyixmax;	/* keyixmap size */
  	const char		*nt_name;	/* table name for debug msgs */
  	u_int			nt_scangen;	/* gen# for iterators */
  	int			nt_inact_init;	/* initial node inact setting */
  };
  
  struct ieee80211_node *ieee80211_alloc_node(struct ieee80211_node_table *,
  		struct ieee80211vap *,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN]);
  struct ieee80211_node *ieee80211_tmp_node(struct ieee80211vap *,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN]);
  struct ieee80211_node *ieee80211_dup_bss(struct ieee80211vap *,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN]);
  struct ieee80211_node *ieee80211_node_create_wds(struct ieee80211vap *,
  		const uint8_t bssid[IEEE80211_ADDR_LEN],
  		struct ieee80211_channel *);
  #ifdef IEEE80211_DEBUG_REFCNT
  void	ieee80211_free_node_debug(struct ieee80211_node *,
  		const char *func, int line);
  struct ieee80211_node *ieee80211_find_node_locked_debug(
  		struct ieee80211_node_table *,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN],
  		const char *func, int line);
  struct ieee80211_node *ieee80211_find_node_debug(struct ieee80211_node_table *,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN],
  		const char *func, int line);
  struct ieee80211_node *ieee80211_find_vap_node_locked_debug(
  		struct ieee80211_node_table *,
  		const struct ieee80211vap *vap,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN],
  		const char *func, int line);
  struct ieee80211_node *ieee80211_find_vap_node_debug(
  		struct ieee80211_node_table *,
  		const struct ieee80211vap *vap,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN],
  		const char *func, int line);
  struct ieee80211_node * ieee80211_find_rxnode_debug(struct ieee80211com *,
  		const struct ieee80211_frame_min *,
  		const char *func, int line);
  struct ieee80211_node * ieee80211_find_rxnode_withkey_debug(
  		struct ieee80211com *,
  		const struct ieee80211_frame_min *, uint16_t keyix,
  		const char *func, int line);
  struct ieee80211_node *ieee80211_find_txnode_debug(struct ieee80211vap *,
  		const uint8_t *,
  		const char *func, int line);
  #define	ieee80211_free_node(ni) \
  	ieee80211_free_node_debug(ni, __func__, __LINE__)
  #define	ieee80211_find_node_locked(nt, mac) \
  	ieee80211_find_node_locked_debug(nt, mac, __func__, __LINE__)
  #define	ieee80211_find_node(nt, mac) \
  	ieee80211_find_node_debug(nt, mac, __func__, __LINE__)
  #define	ieee80211_find_vap_node_locked(nt, vap, mac) \
  	ieee80211_find_vap_node_locked_debug(nt, vap, mac, __func__, __LINE__)
  #define	ieee80211_find_vap_node(nt, vap, mac) \
  	ieee80211_find_vap_node_debug(nt, vap, mac, __func__, __LINE__)
  #define	ieee80211_find_rxnode(ic, wh) \
  	ieee80211_find_rxnode_debug(ic, wh, __func__, __LINE__)
  #define	ieee80211_find_rxnode_withkey(ic, wh, keyix) \
  	ieee80211_find_rxnode_withkey_debug(ic, wh, keyix, __func__, __LINE__)
  #define	ieee80211_find_txnode(vap, mac) \
  	ieee80211_find_txnode_debug(vap, mac, __func__, __LINE__)
  #else
  void	ieee80211_free_node(struct ieee80211_node *);
  struct ieee80211_node *ieee80211_find_node_locked(struct ieee80211_node_table *,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN]);
  struct ieee80211_node *ieee80211_find_node(struct ieee80211_node_table *,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN]);
  struct ieee80211_node *ieee80211_find_vap_node_locked(
  		struct ieee80211_node_table *, const struct ieee80211vap *,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN]);
  struct ieee80211_node *ieee80211_find_vap_node(
  		struct ieee80211_node_table *, const struct ieee80211vap *,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN]);
  struct ieee80211_node * ieee80211_find_rxnode(struct ieee80211com *,
  		const struct ieee80211_frame_min *);
  struct ieee80211_node * ieee80211_find_rxnode_withkey(struct ieee80211com *,
  		const struct ieee80211_frame_min *, uint16_t keyix);
  struct ieee80211_node *ieee80211_find_txnode(struct ieee80211vap *,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN]);
  #endif
  int	ieee80211_node_delucastkey(struct ieee80211_node *);
  
  typedef void ieee80211_iter_func(void *, struct ieee80211_node *);
  void	ieee80211_iterate_nodes(struct ieee80211_node_table *,
  		ieee80211_iter_func *, void *);
  
  void	ieee80211_notify_erp(struct ieee80211com *);
  void	ieee80211_dump_node(struct ieee80211_node_table *,
  		struct ieee80211_node *);
  void	ieee80211_dump_nodes(struct ieee80211_node_table *);
  
  struct ieee80211_node *ieee80211_fakeup_adhoc_node(struct ieee80211vap *,
  		const uint8_t macaddr[IEEE80211_ADDR_LEN]);
  struct ieee80211_scanparams;
  void	ieee80211_init_neighbor(struct ieee80211_node *,
  		const struct ieee80211_frame *,
  		const struct ieee80211_scanparams *);
  struct ieee80211_node *ieee80211_add_neighbor(struct ieee80211vap *,
  		const struct ieee80211_frame *,
  		const struct ieee80211_scanparams *);
  void	ieee80211_node_join(struct ieee80211_node *,int);
  void	ieee80211_node_leave(struct ieee80211_node *);
  int8_t	ieee80211_getrssi(struct ieee80211vap *);
  void	ieee80211_getsignal(struct ieee80211vap *, int8_t *, int8_t *);
  #endif /* _NET80211_IEEE80211_NODE_H_ */
  