FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_node.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * 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: releng/12.0/sys/net80211/ieee80211_node.h 326272 2017-11-27 15:23:17Z pfg $
     */
    #ifndef _NET80211_IEEE80211_NODE_H_
    #define _NET80211_IEEE80211_NODE_H_
    
    #include <net80211/ieee80211_ioctl.h>           /* for ieee80211_nodestats */
    #include <net80211/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 its 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;
    struct ieee80211_scanparams;
    
    /*
     * 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 *vhtcap_ie;     /* captured VHTCAP ie */
            uint8_t *vhtopmode_ie;  /* captured VHTOPMODE ie */
            uint8_t *vhtpwrenv_ie;  /* captured VHTPWRENV ie */
            uint8_t *apchanrep_ie;  /* captured APCHANREP ie */
            uint8_t *bssload_ie;    /* captured BSSLOAD 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 \
           "\2\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_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 */
   #define IEEE80211_NODE_VHT      0x100000        /* VHT enabled */
   #define IEEE80211_NODE_LDPC     0x200000        /* LDPC 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;
           uint32_t                ni_jointime;    /* time of join (secs) */
           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 */
   
           /* mimo statistics */
           uint32_t                ni_mimo_rssi_ctl[IEEE80211_MAX_CHAINS];
           uint32_t                ni_mimo_rssi_ext[IEEE80211_MAX_CHAINS];
           uint8_t                 ni_mimo_noise_ctl[IEEE80211_MAX_CHAINS];
           uint8_t                 ni_mimo_noise_ext[IEEE80211_MAX_CHAINS];
           uint8_t                 ni_mimo_chains;
   
           /* 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 */
           struct callout          ni_mlhtimer;    /* link mesh backoff timer */
           uint8_t                 ni_mlhcnt;      /* link mesh holding counter */
   
           /* 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_TID];
           struct ieee80211_rx_ampdu ni_rx_ampdu[WME_NUM_TID];
   
           /* VHT state */
           uint32_t                ni_vhtcap;
           uint16_t                ni_vht_basicmcs;
           uint16_t                ni_vht_pad2;
           struct ieee80211_vht_mcs_info   ni_vht_mcsinfo;
           uint8_t                 ni_vht_chan1;   /* 20/40/80/160 - VHT chan1 */
           uint8_t                 ni_vht_chan2;   /* 80+80 - VHT chan2 */
           uint8_t                 ni_vht_chanwidth;       /* IEEE80211_VHT_CHANWIDTH_ */
           uint8_t                 ni_vht_pad1;
           uint32_t                ni_vht_spare[8];
   
           /* fast-frames state */
           struct mbuf *           ni_tx_superg[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 */
   
           /* quiet time IE state for the given node */
           uint32_t                ni_quiet_ie_set;        /* Quiet time IE was seen */
           struct                  ieee80211_quiet_ie ni_quiet_ie; /* last seen quiet IE */
   
           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 \
           "\2\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 */
   }
   
   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 *);
   void    ieee80211_update_chw(struct ieee80211com *);
   int     ieee80211_ibss_merge_check(struct ieee80211_node *);
   int     ieee80211_ibss_node_check_new(struct ieee80211_node *ni,
               const struct ieee80211_scanparams *);
   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 */
           ieee80211_node_lock_t   nt_nodelock;    /* on node table */
           TAILQ_HEAD(, ieee80211_node) nt_node;   /* information of all nodes */
           LIST_HEAD(, ieee80211_node) nt_hash[IEEE80211_NODE_HASHSIZE];
           int                     nt_count;       /* number of nodes */
           struct ieee80211_node   **nt_keyixmap;  /* key ix -> node map */
           int                     nt_keyixmax;    /* keyixmap size */
           const char              *nt_name;       /* table name for debug msgs */
           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 *);
   void    ieee80211_node_timeout(void *arg);
   
   typedef void ieee80211_iter_func(void *, struct ieee80211_node *);
   int     ieee80211_iterate_nodes_vap(struct ieee80211_node_table *,
                   struct ieee80211vap *, ieee80211_iter_func *, void *);
   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_ */

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