/* $OpenBSD: ieee80211_var.h,v 1.102 2020/07/15 22:49:08 cheloha Exp $ */ /* $NetBSD: ieee80211_var.h,v 1.7 2004/05/06 03:07:10 dyoung Exp $ */ /*- * Copyright (c) 2001 Atsushi Onoe * Copyright (c) 2002, 2003 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. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * 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: src/sys/net80211/ieee80211_var.h,v 1.15 2004/04/05 22:10:26 sam Exp $ */ #ifndef _NET80211_IEEE80211_VAR_H_ #define _NET80211_IEEE80211_VAR_H_ /* * Definitions for IEEE 802.11 drivers. */ #ifdef SMALL_KERNEL #define IEEE80211_STA_ONLY 1 #endif #include #include #include #include /* for ieee80211_stats */ #include #include #define IEEE80211_CHAN_MAX 255 #define IEEE80211_CHAN_ANY 0xffff /* token for ``any channel'' */ #define IEEE80211_CHAN_ANYC \ ((struct ieee80211_channel *) NULL) #define IEEE80211_TXPOWER_MAX 100 /* max power */ #define IEEE80211_TXPOWER_MIN -50 /* kill radio (if possible) */ #define IEEE80211_RSSI_THRES_2GHZ (-60) /* in dBm */ #define IEEE80211_RSSI_THRES_5GHZ (-70) /* in dBm */ #define IEEE80211_RSSI_THRES_RATIO_2GHZ 60 /* in percent */ #define IEEE80211_RSSI_THRES_RATIO_5GHZ 50 /* in percent */ #define IEEE80211_BGSCAN_FAIL_MAX 512 /* units of 500 msec */ /* * Missed beacon threshold: An access point has disappeared if this amount * of consecutive beacons have been missed. * This value needs to be high enough to avoid frequent re-connects to APs * which suffer from occasional packet loss, and low enough to avoid a long * delay before we start scanning when an AP has actually disappeared. * * The beacon interval is variable, but generally in the order of 100ms. * So 30 beacons implies a grace period of about 3 seconds before we start * searching for a new AP. */ #define IEEE80211_BEACON_MISS_THRES 30 /* units of beacons */ enum ieee80211_phytype { IEEE80211_T_DS, /* direct sequence spread spectrum */ IEEE80211_T_OFDM, /* frequency division multiplexing */ IEEE80211_T_XR /* extended range mode */ }; #define IEEE80211_T_CCK IEEE80211_T_DS /* more common nomenclature */ /* XXX not really a mode; there are really multiple PHY's */ enum ieee80211_phymode { IEEE80211_MODE_AUTO = 0, /* autoselect */ IEEE80211_MODE_11A = 1, /* 5GHz, OFDM */ IEEE80211_MODE_11B = 2, /* 2GHz, CCK */ IEEE80211_MODE_11G = 3, /* 2GHz, OFDM */ IEEE80211_MODE_11N = 4, /* 2GHz/5GHz, OFDM/HT */ IEEE80211_MODE_11AC = 5, /* 5GHz, OFDM/VHT */ }; #define IEEE80211_MODE_MAX (IEEE80211_MODE_11AC+1) enum ieee80211_opmode { IEEE80211_M_STA = 1, /* infrastructure station */ #ifndef IEEE80211_STA_ONLY IEEE80211_M_IBSS = 0, /* IBSS (adhoc) station */ IEEE80211_M_AHDEMO = 3, /* Old lucent compatible adhoc demo */ IEEE80211_M_HOSTAP = 6, /* Software Access Point */ #endif IEEE80211_M_MONITOR = 8 /* Monitor mode */ }; /* * 802.11g protection mode. */ enum ieee80211_protmode { IEEE80211_PROT_NONE = 0, /* no protection */ IEEE80211_PROT_CTSONLY = 1, /* CTS to self */ IEEE80211_PROT_RTSCTS = 2 /* RTS-CTS */ }; /* * Channels are specified by frequency and attributes. */ struct ieee80211_channel { u_int16_t ic_freq; /* setting in MHz */ u_int16_t ic_flags; /* see below */ }; /* * Channel attributes (XXX must keep in sync with radiotap flags). */ #define IEEE80211_CHAN_CCK 0x0020 /* CCK channel */ #define IEEE80211_CHAN_OFDM 0x0040 /* OFDM channel */ #define IEEE80211_CHAN_2GHZ 0x0080 /* 2 GHz spectrum channel */ #define IEEE80211_CHAN_5GHZ 0x0100 /* 5 GHz spectrum channel */ #define IEEE80211_CHAN_PASSIVE 0x0200 /* Only passive scan allowed */ #define IEEE80211_CHAN_DYN 0x0400 /* Dynamic CCK-OFDM channel */ #define IEEE80211_CHAN_XR 0x1000 /* Extended range OFDM channel */ #define IEEE80211_CHAN_HT 0x2000 /* 11n/HT channel */ #define IEEE80211_CHAN_VHT 0x4000 /* 11ac/VHT channel */ /* * Useful combinations of channel characteristics. */ #define IEEE80211_CHAN_A \ (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM) #define IEEE80211_CHAN_B \ (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_CCK) #define IEEE80211_CHAN_PUREG \ (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_OFDM) #define IEEE80211_CHAN_G \ (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN) #define IEEE80211_IS_CHAN_A(_c) \ (((_c)->ic_flags & IEEE80211_CHAN_A) == IEEE80211_CHAN_A) #define IEEE80211_IS_CHAN_B(_c) \ (((_c)->ic_flags & IEEE80211_CHAN_B) == IEEE80211_CHAN_B) #define IEEE80211_IS_CHAN_PUREG(_c) \ (((_c)->ic_flags & IEEE80211_CHAN_PUREG) == IEEE80211_CHAN_PUREG) #define IEEE80211_IS_CHAN_G(_c) \ (((_c)->ic_flags & IEEE80211_CHAN_G) == IEEE80211_CHAN_G) #define IEEE80211_IS_CHAN_N(_c) \ (((_c)->ic_flags & IEEE80211_CHAN_HT) == IEEE80211_CHAN_HT) #define IEEE80211_IS_CHAN_AC(_c) \ (((_c)->ic_flags & IEEE80211_CHAN_VHT) == IEEE80211_CHAN_VHT) #define IEEE80211_IS_CHAN_2GHZ(_c) \ (((_c)->ic_flags & IEEE80211_CHAN_2GHZ) != 0) #define IEEE80211_IS_CHAN_5GHZ(_c) \ (((_c)->ic_flags & IEEE80211_CHAN_5GHZ) != 0) #define IEEE80211_IS_CHAN_OFDM(_c) \ (((_c)->ic_flags & IEEE80211_CHAN_OFDM) != 0) #define IEEE80211_IS_CHAN_CCK(_c) \ (((_c)->ic_flags & IEEE80211_CHAN_CCK) != 0) #define IEEE80211_IS_CHAN_XR(_c) \ (((_c)->ic_flags & IEEE80211_CHAN_XR) != 0) /* * EDCA AC parameters. */ struct ieee80211_edca_ac_params { u_int8_t ac_ecwmin; /* CWmin = 2^ECWmin - 1 */ u_int8_t ac_ecwmax; /* CWmax = 2^ECWmax - 1 */ u_int8_t ac_aifsn; u_int16_t ac_txoplimit; /* 32TU */ #define IEEE80211_TXOP_TO_US(txop) ((txop) * 32) u_int8_t ac_acm; }; extern const struct ieee80211_edca_ac_params ieee80211_edca_table[IEEE80211_MODE_MAX][EDCA_NUM_AC]; extern const struct ieee80211_edca_ac_params ieee80211_qap_edca_table[IEEE80211_MODE_MAX][EDCA_NUM_AC]; #define IEEE80211_DEFRAG_SIZE 3 /* must be >= 3 according to spec */ /* * Entry in the fragment cache. */ struct ieee80211_defrag { struct timeout df_to; struct mbuf *df_m; u_int16_t df_seq; u_int8_t df_frag; }; #define IEEE80211_PROTO_NONE 0 #define IEEE80211_PROTO_RSN (1 << 0) #define IEEE80211_PROTO_WPA (1 << 1) #define IEEE80211_SCAN_UNLOCKED 0x0 #define IEEE80211_SCAN_LOCKED 0x1 #define IEEE80211_SCAN_REQUEST 0x2 #define IEEE80211_SCAN_RESUME 0x4 #define IEEE80211_GROUP_NKID 6 struct ieee80211com { struct arpcom ic_ac; LIST_ENTRY(ieee80211com) ic_list; /* chain of all ieee80211com */ void (*ic_recv_mgmt)(struct ieee80211com *, struct mbuf *, struct ieee80211_node *, struct ieee80211_rxinfo *, int); int (*ic_send_mgmt)(struct ieee80211com *, struct ieee80211_node *, int, int, int); int (*ic_newstate)(struct ieee80211com *, enum ieee80211_state, int); int (*ic_newauth)(struct ieee80211com *, struct ieee80211_node *, int, uint16_t); void (*ic_newassoc)(struct ieee80211com *, struct ieee80211_node *, int); void (*ic_node_leave)(struct ieee80211com *, struct ieee80211_node *); void (*ic_updateslot)(struct ieee80211com *); void (*ic_updateedca)(struct ieee80211com *); void (*ic_set_tim)(struct ieee80211com *, int, int); int (*ic_set_key)(struct ieee80211com *, struct ieee80211_node *, struct ieee80211_key *); void (*ic_delete_key)(struct ieee80211com *, struct ieee80211_node *, struct ieee80211_key *); int (*ic_ampdu_tx_start)(struct ieee80211com *, struct ieee80211_node *, u_int8_t); void (*ic_ampdu_tx_stop)(struct ieee80211com *, struct ieee80211_node *, u_int8_t); int (*ic_ampdu_rx_start)(struct ieee80211com *, struct ieee80211_node *, u_int8_t); void (*ic_ampdu_rx_stop)(struct ieee80211com *, struct ieee80211_node *, u_int8_t); void (*ic_update_htprot)(struct ieee80211com *, struct ieee80211_node *); int (*ic_bgscan_start)(struct ieee80211com *); struct timeout ic_bgscan_timeout; uint32_t ic_bgscan_fail; u_int8_t ic_myaddr[IEEE80211_ADDR_LEN]; struct ieee80211_rateset ic_sup_rates[IEEE80211_MODE_MAX]; struct ieee80211_channel ic_channels[IEEE80211_CHAN_MAX+1]; u_char ic_chan_avail[howmany(IEEE80211_CHAN_MAX,NBBY)]; u_char ic_chan_active[howmany(IEEE80211_CHAN_MAX, NBBY)]; u_char ic_chan_scan[howmany(IEEE80211_CHAN_MAX,NBBY)]; struct mbuf_queue ic_mgtq; struct mbuf_queue ic_pwrsaveq; u_int8_t ic_scan_count; /* count scans */ u_int32_t ic_flags; /* state flags */ u_int32_t ic_xflags; /* more flags */ u_int32_t ic_userflags; /* yet more flags */ u_int32_t ic_caps; /* capabilities */ u_int16_t ic_modecaps; /* set of mode capabilities */ u_int16_t ic_curmode; /* current mode */ enum ieee80211_phytype ic_phytype; /* XXX wrong for multi-mode */ enum ieee80211_opmode ic_opmode; /* operation mode */ enum ieee80211_state ic_state; /* 802.11 state */ u_int32_t *ic_aid_bitmap; u_int16_t ic_max_aid; enum ieee80211_protmode ic_protmode; /* 802.11g/n protection mode */ struct ifmedia ic_media; /* interface media config */ caddr_t ic_rawbpf; /* packet filter structure */ struct ieee80211_node *ic_bss; /* information for this node */ struct ieee80211_channel *ic_ibss_chan; int ic_fixed_rate; /* index to ic_sup_rates[] */ u_int16_t ic_rtsthreshold; u_int16_t ic_fragthreshold; u_int ic_scangen; /* gen# for timeout scan */ struct ieee80211_node *(*ic_node_alloc)(struct ieee80211com *); void (*ic_node_free)(struct ieee80211com *, struct ieee80211_node *); void (*ic_node_copy)(struct ieee80211com *, struct ieee80211_node *, const struct ieee80211_node *); u_int8_t (*ic_node_getrssi)(struct ieee80211com *, const struct ieee80211_node *); int (*ic_node_checkrssi)(struct ieee80211com *, const struct ieee80211_node *); u_int8_t ic_max_rssi; struct ieee80211_tree ic_tree; int ic_nnodes; /* length of ic_nnodes */ int ic_max_nnodes; /* max length of ic_nnodes */ u_int16_t ic_lintval; /* listen interval */ int16_t ic_txpower; /* tx power setting (dBm) */ int ic_bmissthres; /* beacon miss threshold */ int ic_mgt_timer; /* mgmt timeout */ #ifndef IEEE80211_STA_ONLY struct timeout ic_inact_timeout; /* node inactivity timeout */ struct timeout ic_node_cache_timeout; #endif int ic_des_esslen; u_int8_t ic_des_essid[IEEE80211_NWID_LEN]; struct ieee80211_channel *ic_des_chan; /* desired channel */ u_int8_t ic_des_bssid[IEEE80211_ADDR_LEN]; struct ieee80211_key ic_nw_keys[IEEE80211_GROUP_NKID]; int ic_def_txkey; /* group data key index */ #define ic_wep_txkey ic_def_txkey int ic_igtk_kid; /* IGTK key index */ u_int32_t ic_iv; /* initial vector for wep */ struct ieee80211_stats ic_stats; /* statistics */ struct timeval ic_last_merge_print; /* for rate-limiting * IBSS merge print-outs */ struct ieee80211_edca_ac_params ic_edca_ac[EDCA_NUM_AC]; u_int ic_edca_updtcount; u_int16_t ic_tid_noack; u_int8_t ic_globalcnt[EAPOL_KEY_NONCE_LEN]; u_int8_t ic_nonce[EAPOL_KEY_NONCE_LEN]; u_int8_t ic_psk[IEEE80211_PMK_LEN]; struct timeout ic_rsn_timeout; time_t ic_tkip_micfail; u_int64_t ic_tkip_micfail_last_tsc; #ifndef IEEE80211_STA_ONLY struct timeout ic_tkip_micfail_timeout; #endif TAILQ_HEAD(, ieee80211_pmk) ic_pmksa; /* PMKSA cache */ u_int ic_rsnprotos; u_int ic_rsnakms; u_int ic_rsnciphers; enum ieee80211_cipher ic_rsngroupcipher; enum ieee80211_cipher ic_rsngroupmgmtcipher; struct ieee80211_defrag ic_defrag[IEEE80211_DEFRAG_SIZE]; int ic_defrag_cur; u_int8_t *ic_tim_bitmap; u_int ic_tim_len; u_int ic_tim_mcast_pending; u_int ic_dtim_period; u_int ic_dtim_count; u_int32_t ic_txbfcaps; u_int16_t ic_htcaps; u_int8_t ic_ampdu_params; u_int8_t ic_sup_mcs[howmany(80, NBBY)]; u_int16_t ic_max_rxrate; /* in Mb/s, 0 <= rate <= 1023 */ u_int8_t ic_tx_mcs_set; u_int16_t ic_htxcaps; u_int8_t ic_aselcaps; u_int8_t ic_dialog_token; int ic_fixed_mcs; TAILQ_HEAD(, ieee80211_ess) ic_ess; }; #define ic_if ic_ac.ac_if #define ic_softc ic_if.if_softc /* list of APs we want to automatically use */ /* all data is copied from struct ieee80211com */ struct ieee80211_ess { /* nwid */ int esslen; u_int8_t essid[IEEE80211_NWID_LEN]; /* clear/wep/wpa */ u_int32_t flags; /* nwkey */ struct ieee80211_key nw_keys[IEEE80211_GROUP_NKID]; int def_txkey; /* wpakey */ u_int8_t psk[IEEE80211_PMK_LEN]; u_int rsnprotos; u_int rsnakms; u_int rsnciphers; enum ieee80211_cipher rsngroupcipher; TAILQ_ENTRY(ieee80211_ess) ess_next; }; #define IEEE80211_ADDR_EQ(a1,a2) (memcmp(a1,a2,IEEE80211_ADDR_LEN) == 0) #define IEEE80211_ADDR_COPY(dst,src) memcpy(dst,src,IEEE80211_ADDR_LEN) /* ic_flags */ #define IEEE80211_F_ASCAN 0x00000001 /* STATUS: active scan */ #define IEEE80211_F_SIBSS 0x00000002 /* STATUS: start IBSS */ #define IEEE80211_F_WEPON 0x00000100 /* CONF: WEP enabled */ #define IEEE80211_F_IBSSON 0x00000200 /* CONF: IBSS creation enable */ #define IEEE80211_F_PMGTON 0x00000400 /* CONF: Power mgmt enable */ #define IEEE80211_F_DESBSSID 0x00000800 /* CONF: des_bssid is set */ #define IEEE80211_F_ROAMING 0x00002000 /* CONF: roaming enabled */ #define IEEE80211_F_TXPMGT 0x00018000 /* STATUS: tx power */ #define IEEE80211_F_TXPOW_OFF 0x00000000 /* TX Power: radio disabled */ #define IEEE80211_F_TXPOW_FIXED 0x00008000 /* TX Power: fixed rate */ #define IEEE80211_F_TXPOW_AUTO 0x00010000 /* TX Power: undefined */ #define IEEE80211_F_SHSLOT 0x00020000 /* STATUS: short slot time */ #define IEEE80211_F_SHPREAMBLE 0x00040000 /* STATUS: short preamble */ #define IEEE80211_F_QOS 0x00080000 /* CONF: QoS enabled */ #define IEEE80211_F_USEPROT 0x00100000 /* STATUS: protection enabled */ #define IEEE80211_F_RSNON 0x00200000 /* CONF: RSN enabled */ #define IEEE80211_F_PSK 0x00400000 /* CONF: pre-shared key set */ #define IEEE80211_F_COUNTERM 0x00800000 /* STATUS: countermeasures */ #define IEEE80211_F_MFPR 0x01000000 /* CONF: MFP required */ #define IEEE80211_F_HTON 0x02000000 /* CONF: HT enabled */ #define IEEE80211_F_PBAR 0x04000000 /* CONF: PBAC required */ #define IEEE80211_F_BGSCAN 0x08000000 /* STATUS: background scan */ #define IEEE80211_F_AUTO_JOIN 0x10000000 /* CONF: auto-join active */ #define IEEE80211_F_VHTON 0x20000000 /* CONF: VHT enabled */ /* ic_xflags */ #define IEEE80211_F_TX_MGMT_ONLY 0x00000001 /* leave data frames on ifq */ /* ic_caps */ #define IEEE80211_C_WEP 0x00000001 /* CAPABILITY: WEP available */ #define IEEE80211_C_IBSS 0x00000002 /* CAPABILITY: IBSS available */ #define IEEE80211_C_PMGT 0x00000004 /* CAPABILITY: Power mgmt */ #define IEEE80211_C_HOSTAP 0x00000008 /* CAPABILITY: HOSTAP avail */ #define IEEE80211_C_AHDEMO 0x00000010 /* CAPABILITY: Old Adhoc Demo */ #define IEEE80211_C_APPMGT 0x00000020 /* CAPABILITY: AP power mgmt */ #define IEEE80211_C_TXPMGT 0x00000040 /* CAPABILITY: tx power mgmt */ #define IEEE80211_C_SHSLOT 0x00000080 /* CAPABILITY: short slottime */ #define IEEE80211_C_SHPREAMBLE 0x00000100 /* CAPABILITY: short preamble */ #define IEEE80211_C_MONITOR 0x00000200 /* CAPABILITY: monitor mode */ #define IEEE80211_C_SCANALL 0x00000400 /* CAPABILITY: scan all chan */ #define IEEE80211_C_QOS 0x00000800 /* CAPABILITY: QoS avail */ #define IEEE80211_C_RSN 0x00001000 /* CAPABILITY: RSN avail */ #define IEEE80211_C_MFP 0x00002000 /* CAPABILITY: MFP avail */ #define IEEE80211_C_RAWCTL 0x00004000 /* CAPABILITY: raw ctl */ #define IEEE80211_C_SCANALLBAND 0x00008000 /* CAPABILITY: scan all bands */ #define IEEE80211_C_TX_AMPDU 0x00010000 /* CAPABILITY: send A-MPDU */ /* flags for ieee80211_fix_rate() */ #define IEEE80211_F_DOSORT 0x00000001 /* sort rate list */ #define IEEE80211_F_DOFRATE 0x00000002 /* use fixed rate */ #define IEEE80211_F_DONEGO 0x00000004 /* calc negotiated rate */ #define IEEE80211_F_DODEL 0x00000008 /* delete ignore rate */ void ieee80211_ifattach(struct ifnet *); void ieee80211_ifdetach(struct ifnet *); void ieee80211_channel_init(struct ifnet *); void ieee80211_media_init(struct ifnet *, ifm_change_cb_t, ifm_stat_cb_t); int ieee80211_media_change(struct ifnet *); void ieee80211_media_status(struct ifnet *, struct ifmediareq *); int ieee80211_ioctl(struct ifnet *, u_long, caddr_t); int ieee80211_get_rate(struct ieee80211com *); void ieee80211_watchdog(struct ifnet *); int ieee80211_fix_rate(struct ieee80211com *, struct ieee80211_node *, int); uint64_t ieee80211_rate2media(struct ieee80211com *, int, enum ieee80211_phymode); int ieee80211_media2rate(uint64_t); uint64_t ieee80211_mcs2media(struct ieee80211com *, int, enum ieee80211_phymode); int ieee80211_media2mcs(uint64_t); u_int8_t ieee80211_rate2plcp(u_int8_t, enum ieee80211_phymode); u_int8_t ieee80211_plcp2rate(u_int8_t, enum ieee80211_phymode); u_int ieee80211_mhz2ieee(u_int, u_int); u_int ieee80211_chan2ieee(struct ieee80211com *, const struct ieee80211_channel *); u_int ieee80211_ieee2mhz(u_int, u_int); int ieee80211_min_basic_rate(struct ieee80211com *); int ieee80211_max_basic_rate(struct ieee80211com *); int ieee80211_setmode(struct ieee80211com *, enum ieee80211_phymode); enum ieee80211_phymode ieee80211_next_mode(struct ifnet *); enum ieee80211_phymode ieee80211_chan2mode(struct ieee80211com *, const struct ieee80211_channel *); void ieee80211_disable_wep(struct ieee80211com *); void ieee80211_disable_rsn(struct ieee80211com *); int ieee80211_add_ess(struct ieee80211com *, struct ieee80211_join *); void ieee80211_del_ess(struct ieee80211com *, char *, int, int); void ieee80211_set_ess(struct ieee80211com *, struct ieee80211_ess *, struct ieee80211_node *); void ieee80211_deselect_ess(struct ieee80211com *); struct ieee80211_ess *ieee80211_get_ess(struct ieee80211com *, const char *, int); void ieee80211_begin_bgscan(struct ifnet *); extern int ieee80211_cache_size; #endif /* _NET80211_IEEE80211_VAR_H_ */