/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2001 Atsushi Onoe
 * Copyright (c) 2002-2008 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.
 *
 * $FreeBSD$
 */
#ifndef _NET80211__IEEE80211_H_
#define _NET80211__IEEE80211_H_

/*
 * 802.11 implementation definitions.
 *
 * NB: this file is used by applications.
 */

/*
 * PHY type; mostly used to identify FH phys.
 */
enum ieee80211_phytype {
        IEEE80211_T_DS,                 /* direct sequence spread spectrum */
        IEEE80211_T_FH,                 /* frequency hopping */
        IEEE80211_T_OFDM,               /* frequency division multiplexing */
        IEEE80211_T_TURBO,              /* high rate OFDM, aka turbo mode */
        IEEE80211_T_HT,                 /* high throughput */
        IEEE80211_T_OFDM_HALF,          /* 1/2 rate OFDM */
        IEEE80211_T_OFDM_QUARTER,       /* 1/4 rate OFDM */
        IEEE80211_T_VHT,                /* VHT PHY */
};
#define IEEE80211_T_CCK IEEE80211_T_DS  /* more common nomenclature */

/*
 * PHY mode; this is not really a mode as multi-mode devices
 * have multiple PHY's.  Mode is mostly used as a shorthand
 * for constraining which channels to consider in setting up
 * operation.  Modes used to be used more extensively when
 * channels were identified as IEEE channel numbers.
 */
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_FH       = 4,    /* 2GHz, GFSK */
        IEEE80211_MODE_TURBO_A  = 5,    /* 5GHz, OFDM, 2x clock */
        IEEE80211_MODE_TURBO_G  = 6,    /* 2GHz, OFDM, 2x clock */
        IEEE80211_MODE_STURBO_A = 7,    /* 5GHz, OFDM, 2x clock, static */
        IEEE80211_MODE_11NA     = 8,    /* 5GHz, w/ HT */
        IEEE80211_MODE_11NG     = 9,    /* 2GHz, w/ HT */
        IEEE80211_MODE_HALF     = 10,   /* OFDM, 1/2x clock */
        IEEE80211_MODE_QUARTER  = 11,   /* OFDM, 1/4x clock */
        IEEE80211_MODE_VHT_2GHZ = 12,   /* 2GHz, VHT */
        IEEE80211_MODE_VHT_5GHZ = 13,   /* 5GHz, VHT */
};
#define IEEE80211_MODE_MAX      (IEEE80211_MODE_VHT_5GHZ+1)
#define IEEE80211_MODE_BYTES    howmany(IEEE80211_MODE_MAX, NBBY)

/*
 * Operating mode.  Devices do not necessarily support
 * all modes; they indicate which are supported in their
 * capabilities.
 */
enum ieee80211_opmode {
        IEEE80211_M_IBSS        = 0,    /* IBSS (adhoc) station */
        IEEE80211_M_STA         = 1,    /* infrastructure station */
        IEEE80211_M_WDS         = 2,    /* WDS link */
        IEEE80211_M_AHDEMO      = 3,    /* Old lucent compatible adhoc demo */
        IEEE80211_M_HOSTAP      = 4,    /* Software Access Point */
        IEEE80211_M_MONITOR     = 5,    /* Monitor mode */
        IEEE80211_M_MBSS        = 6,    /* MBSS (Mesh Point) link */
};
#define IEEE80211_OPMODE_MAX    (IEEE80211_M_MBSS+1)

/*
 * 802.11g/802.11n protection mode.
 */
enum ieee80211_protmode {
        IEEE80211_PROT_NONE     = 0,    /* no protection */
        IEEE80211_PROT_CTSONLY  = 1,    /* CTS to self */
        IEEE80211_PROT_RTSCTS   = 2,    /* RTS-CTS */
};

/*
 * Authentication mode.  The open and shared key authentication
 * modes are implemented within the 802.11 layer.  802.1x and
 * WPA/802.11i are implemented in user mode by setting the
 * 802.11 layer into IEEE80211_AUTH_8021X and deferring
 * authentication to user space programs.
 */
enum ieee80211_authmode {
        IEEE80211_AUTH_NONE     = 0,
        IEEE80211_AUTH_OPEN     = 1,            /* open */
        IEEE80211_AUTH_SHARED   = 2,            /* shared-key */
        IEEE80211_AUTH_8021X    = 3,            /* 802.1x */
        IEEE80211_AUTH_AUTO     = 4,            /* auto-select/accept */
        /* NB: these are used only for ioctls */
        IEEE80211_AUTH_WPA      = 5,            /* WPA/RSN w/ 802.1x/PSK */
};

/*
 * Roaming mode is effectively who controls the operation
 * of the 802.11 state machine when operating as a station.
 * State transitions are controlled either by the driver
 * (typically when management frames are processed by the
 * hardware/firmware), the host (auto/normal operation of
 * the 802.11 layer), or explicitly through ioctl requests
 * when applications like wpa_supplicant want control.
 */
enum ieee80211_roamingmode {
        IEEE80211_ROAMING_DEVICE= 0,    /* driver/hardware control */
        IEEE80211_ROAMING_AUTO  = 1,    /* 802.11 layer control */
        IEEE80211_ROAMING_MANUAL= 2,    /* application control */
};

/*
 * Channels are specified by frequency and attributes.
 */
struct ieee80211_channel {
        uint32_t        ic_flags;       /* see below */
        uint16_t        ic_freq;        /* primary centre frequency in MHz */
        uint8_t         ic_ieee;        /* IEEE channel number */
        int8_t          ic_maxregpower; /* maximum regulatory tx power in dBm */
        int8_t          ic_maxpower;    /* maximum tx power in .5 dBm */
        int8_t          ic_minpower;    /* minimum tx power in .5 dBm */
        uint8_t         ic_state;       /* dynamic state */
        uint8_t         ic_extieee;     /* HT40 extension channel number */
        int8_t          ic_maxantgain;  /* maximum antenna gain in .5 dBm */
        uint8_t         ic_pad;
        uint16_t        ic_devdata;     /* opaque device/driver data */
};

#define IEEE80211_CHAN_MAX      256
#define IEEE80211_CHAN_BYTES    howmany(IEEE80211_CHAN_MAX, NBBY)
#define IEEE80211_CHAN_ANY      0xffff  /* token for ``any channel'' */
#define IEEE80211_CHAN_ANYC \
        ((struct ieee80211_channel *) IEEE80211_CHAN_ANY)

/* channel attributes */
#define IEEE80211_CHAN_PRIV0    0x00000001 /* driver private bit 0 */
#define IEEE80211_CHAN_PRIV1    0x00000002 /* driver private bit 1 */
#define IEEE80211_CHAN_PRIV2    0x00000004 /* driver private bit 2 */
#define IEEE80211_CHAN_PRIV3    0x00000008 /* driver private bit 3 */
#define IEEE80211_CHAN_TURBO    0x00000010 /* Turbo channel */
#define IEEE80211_CHAN_CCK      0x00000020 /* CCK channel */
#define IEEE80211_CHAN_OFDM     0x00000040 /* OFDM channel */
#define IEEE80211_CHAN_2GHZ     0x00000080 /* 2 GHz spectrum channel. */
#define IEEE80211_CHAN_5GHZ     0x00000100 /* 5 GHz spectrum channel */
#define IEEE80211_CHAN_PASSIVE  0x00000200 /* Only passive scan allowed */
#define IEEE80211_CHAN_DYN      0x00000400 /* Dynamic CCK-OFDM channel */
#define IEEE80211_CHAN_GFSK     0x00000800 /* GFSK channel (FHSS PHY) */
#define IEEE80211_CHAN_GSM      0x00001000 /* 900 MHz spectrum channel */
#define IEEE80211_CHAN_STURBO   0x00002000 /* 11a static turbo channel only */
#define IEEE80211_CHAN_HALF     0x00004000 /* Half rate channel */
#define IEEE80211_CHAN_QUARTER  0x00008000 /* Quarter rate channel */
#define IEEE80211_CHAN_HT20     0x00010000 /* HT 20 channel */
#define IEEE80211_CHAN_HT40U    0x00020000 /* HT 40 channel w/ ext above */
#define IEEE80211_CHAN_HT40D    0x00040000 /* HT 40 channel w/ ext below */
#define IEEE80211_CHAN_DFS      0x00080000 /* DFS required */
#define IEEE80211_CHAN_4MSXMIT  0x00100000 /* 4ms limit on frame length */
#define IEEE80211_CHAN_NOADHOC  0x00200000 /* adhoc mode not allowed */
#define IEEE80211_CHAN_NOHOSTAP 0x00400000 /* hostap mode not allowed */
#define IEEE80211_CHAN_11D      0x00800000 /* 802.11d required */
#define IEEE80211_CHAN_VHT20    0x01000000 /* VHT20 channel */
#define IEEE80211_CHAN_VHT40U   0x02000000 /* VHT40 channel, ext above */
#define IEEE80211_CHAN_VHT40D   0x04000000 /* VHT40 channel, ext below */
#define IEEE80211_CHAN_VHT80    0x08000000 /* VHT80 channel */
#define IEEE80211_CHAN_VHT160   0x10000000 /* VHT160 channel */
#define IEEE80211_CHAN_VHT80P80 0x20000000 /* VHT80+80 channel */
/* XXX note: 0x80000000 is used in src/sbin/ifconfig/ifieee80211.c :( */

#define IEEE80211_CHAN_HT40     (IEEE80211_CHAN_HT40U | IEEE80211_CHAN_HT40D)
#define IEEE80211_CHAN_HT       (IEEE80211_CHAN_HT20 | IEEE80211_CHAN_HT40)

#define IEEE80211_CHAN_VHT40    (IEEE80211_CHAN_VHT40U | IEEE80211_CHAN_VHT40D)
#define IEEE80211_CHAN_VHT      (IEEE80211_CHAN_VHT20 | IEEE80211_CHAN_VHT40 \
                                | IEEE80211_CHAN_VHT80 | IEEE80211_CHAN_VHT160 \
                                | IEEE80211_CHAN_VHT80P80)

#define IEEE80211_CHAN_BITS \
        "\20\1PRIV0\2PRIV2\3PRIV3\4PRIV4\5TURBO\6CCK\7OFDM\0102GHZ\0115GHZ" \
        "\12PASSIVE\13DYN\14GFSK\15GSM\16STURBO\17HALF\20QUARTER\21HT20" \
        "\22HT40U\23HT40D\24DFS\0254MSXMIT\26NOADHOC\27NOHOSTAP\03011D" \
        "\031VHT20\032VHT40U\033VHT40D\034VHT80\035VHT160\036VHT80P80"

/*
 * Useful combinations of channel characteristics.
 */
#define IEEE80211_CHAN_FHSS \
        (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_GFSK)
#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_CHAN_108A \
        (IEEE80211_CHAN_A | IEEE80211_CHAN_TURBO)
#define IEEE80211_CHAN_108G \
        (IEEE80211_CHAN_PUREG | IEEE80211_CHAN_TURBO)
#define IEEE80211_CHAN_ST \
        (IEEE80211_CHAN_108A | IEEE80211_CHAN_STURBO)

#define IEEE80211_CHAN_ALL \
        (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_GFSK | \
         IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | IEEE80211_CHAN_DYN | \
         IEEE80211_CHAN_HALF | IEEE80211_CHAN_QUARTER | \
         IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)
#define IEEE80211_CHAN_ALLTURBO \
        (IEEE80211_CHAN_ALL | IEEE80211_CHAN_TURBO | IEEE80211_CHAN_STURBO)

#define IEEE80211_IS_CHAN_FHSS(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_FHSS) == IEEE80211_CHAN_FHSS)
#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_ANYG(_c) \
        (IEEE80211_IS_CHAN_PUREG(_c) || IEEE80211_IS_CHAN_G(_c))
#define IEEE80211_IS_CHAN_ST(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_ST) == IEEE80211_CHAN_ST)
#define IEEE80211_IS_CHAN_108A(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_108A) == IEEE80211_CHAN_108A)
#define IEEE80211_IS_CHAN_108G(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_108G) == IEEE80211_CHAN_108G)

#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_PASSIVE(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_PASSIVE) != 0)
#define IEEE80211_IS_CHAN_OFDM(_c) \
        (((_c)->ic_flags & (IEEE80211_CHAN_OFDM | IEEE80211_CHAN_DYN)) != 0)
#define IEEE80211_IS_CHAN_CCK(_c) \
        (((_c)->ic_flags & (IEEE80211_CHAN_CCK | IEEE80211_CHAN_DYN)) != 0)
#define IEEE80211_IS_CHAN_DYN(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_DYN) == IEEE80211_CHAN_DYN)
#define IEEE80211_IS_CHAN_GFSK(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_GFSK) != 0)
#define IEEE80211_IS_CHAN_TURBO(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_TURBO) != 0)
#define IEEE80211_IS_CHAN_STURBO(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_STURBO) != 0)
#define IEEE80211_IS_CHAN_DTURBO(_c) \
        (((_c)->ic_flags & \
        (IEEE80211_CHAN_TURBO | IEEE80211_CHAN_STURBO)) == IEEE80211_CHAN_TURBO)
#define IEEE80211_IS_CHAN_HALF(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_HALF) != 0)
#define IEEE80211_IS_CHAN_QUARTER(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_QUARTER) != 0)
#define IEEE80211_IS_CHAN_FULL(_c) \
        (((_c)->ic_flags & (IEEE80211_CHAN_QUARTER | IEEE80211_CHAN_HALF)) == 0)
#define IEEE80211_IS_CHAN_GSM(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_GSM) != 0)
#define IEEE80211_IS_CHAN_HT(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_HT) != 0)
#define IEEE80211_IS_CHAN_HT20(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_HT20) != 0)
#define IEEE80211_IS_CHAN_HT40(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_HT40) != 0)
#define IEEE80211_IS_CHAN_HT40U(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_HT40U) != 0)
#define IEEE80211_IS_CHAN_HT40D(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_HT40D) != 0)
#define IEEE80211_IS_CHAN_HTA(_c) \
        (IEEE80211_IS_CHAN_5GHZ(_c) && \
         ((_c)->ic_flags & IEEE80211_CHAN_HT) != 0)
#define IEEE80211_IS_CHAN_HTG(_c) \
        (IEEE80211_IS_CHAN_2GHZ(_c) && \
         ((_c)->ic_flags & IEEE80211_CHAN_HT) != 0)
#define IEEE80211_IS_CHAN_DFS(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_DFS) != 0)
#define IEEE80211_IS_CHAN_NOADHOC(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_NOADHOC) != 0)
#define IEEE80211_IS_CHAN_NOHOSTAP(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_NOHOSTAP) != 0)
#define IEEE80211_IS_CHAN_11D(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_11D) != 0)

#define IEEE80211_IS_CHAN_VHT(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_VHT) != 0)
#define IEEE80211_IS_CHAN_VHT_2GHZ(_c) \
        (IEEE80211_IS_CHAN_2GHZ(_c) && \
         ((_c)->ic_flags & IEEE80211_CHAN_VHT) != 0)
#define IEEE80211_IS_CHAN_VHT_5GHZ(_c) \
        (IEEE80211_IS_CHAN_5GHZ(_c) && \
         ((_c)->ic_flags & IEEE80211_CHAN_VHT) != 0)
#define IEEE80211_IS_CHAN_VHT20(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_VHT20) != 0)
#define IEEE80211_IS_CHAN_VHT40(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_VHT40) != 0)
#define IEEE80211_IS_CHAN_VHT40U(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_VHT40U) != 0)
#define IEEE80211_IS_CHAN_VHT40D(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_VHT40D) != 0)
#define IEEE80211_IS_CHAN_VHTA(_c) \
        (IEEE80211_IS_CHAN_5GHZ(_c) && \
         ((_c)->ic_flags & IEEE80211_CHAN_VHT) != 0)
#define IEEE80211_IS_CHAN_VHTG(_c) \
        (IEEE80211_IS_CHAN_2GHZ(_c) && \
         ((_c)->ic_flags & IEEE80211_CHAN_VHT) != 0)
#define IEEE80211_IS_CHAN_VHT80(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_VHT80) != 0)
#define IEEE80211_IS_CHAN_VHT160(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_VHT160) != 0)
#define IEEE80211_IS_CHAN_VHT80P80(_c) \
        (((_c)->ic_flags & IEEE80211_CHAN_VHT80P80) != 0)

#define IEEE80211_CHAN2IEEE(_c)         (_c)->ic_ieee

/* dynamic state */
#define IEEE80211_CHANSTATE_RADAR       0x01    /* radar detected */
#define IEEE80211_CHANSTATE_CACDONE     0x02    /* CAC completed */
#define IEEE80211_CHANSTATE_CWINT       0x04    /* interference detected */
#define IEEE80211_CHANSTATE_NORADAR     0x10    /* post notify on radar clear */

#define IEEE80211_IS_CHAN_RADAR(_c) \
        (((_c)->ic_state & IEEE80211_CHANSTATE_RADAR) != 0)
#define IEEE80211_IS_CHAN_CACDONE(_c) \
        (((_c)->ic_state & IEEE80211_CHANSTATE_CACDONE) != 0)
#define IEEE80211_IS_CHAN_CWINT(_c) \
        (((_c)->ic_state & IEEE80211_CHANSTATE_CWINT) != 0)

/* ni_chan encoding for FH phy */
#define IEEE80211_FH_CHANMOD    80
#define IEEE80211_FH_CHAN(set,pat)      (((set)-1)*IEEE80211_FH_CHANMOD+(pat))
#define IEEE80211_FH_CHANSET(chan)      ((chan)/IEEE80211_FH_CHANMOD+1)
#define IEEE80211_FH_CHANPAT(chan)      ((chan)%IEEE80211_FH_CHANMOD)

#define IEEE80211_TID_SIZE      (WME_NUM_TID+1) /* WME TID's +1 for non-QoS */
#define IEEE80211_NONQOS_TID    WME_NUM_TID     /* index for non-QoS sta */

/*
 * The 802.11 spec says at most 2007 stations may be
 * associated at once.  For most AP's this is way more
 * than is feasible so we use a default of 128.  This
 * number may be overridden by the driver and/or by
 * user configuration but may not be less than IEEE80211_AID_MIN.
 */
#define IEEE80211_AID_DEF               128
#define IEEE80211_AID_MIN               16

/*
 * 802.11 rate set.
 */
#define IEEE80211_RATE_SIZE     8               /* 802.11 standard */
#define IEEE80211_RATE_MAXSIZE  15              /* max rates we'll handle */

struct ieee80211_rateset {
        uint8_t         rs_nrates;
        uint8_t         rs_rates[IEEE80211_RATE_MAXSIZE];
};

/*
 * 802.11n variant of ieee80211_rateset.  Instead of
 * legacy rates the entries are MCS rates.  We define
 * the structure such that it can be used interchangeably
 * with an ieee80211_rateset (modulo structure size).
 */
#define IEEE80211_HTRATE_MAXSIZE        77

struct ieee80211_htrateset {
        uint8_t         rs_nrates;
        uint8_t         rs_rates[IEEE80211_HTRATE_MAXSIZE];
};

#define IEEE80211_RATE_MCS      0x80

/*
 * Per-mode transmit parameters/controls visible to user space.
 * These can be used to set fixed transmit rate for all operating
 * modes or on a per-client basis according to the capabilities
 * of the client (e.g. an 11b client associated to an 11g ap).
 *
 * MCS are distinguished from legacy rates by or'ing in 0x80.
 */
struct ieee80211_txparam {
        uint8_t         ucastrate;      /* ucast data rate (legacy/MCS|0x80) */
        uint8_t         mgmtrate;       /* mgmt frame rate (legacy/MCS|0x80) */
        uint8_t         mcastrate;      /* multicast rate (legacy/MCS|0x80) */
        uint8_t         maxretry;       /* max unicast data retry count */
};

/*
 * Per-mode roaming state visible to user space.  There are two
 * thresholds that control whether roaming is considered; when
 * either is exceeded the 802.11 layer will check the scan cache
 * for another AP.  If the cache is stale then a scan may be
 * triggered.
 */
struct ieee80211_roamparam {
        int8_t          rssi;           /* rssi thresh (.5 dBm) */
        uint8_t         rate;           /* tx rate thresh (.5 Mb/s or MCS) */
        uint16_t        pad;            /* reserve */
};

/*
 * Regulatory Information.
 */
struct ieee80211_regdomain {
        uint16_t        regdomain;      /* SKU */
        uint16_t        country;        /* ISO country code */
        uint8_t         location;       /* I (indoor), O (outdoor), other */
        uint8_t         ecm;            /* Extended Channel Mode */
        char            isocc[2];       /* country code string */
        short           pad[2];
};

/*
 * MIMO antenna/radio state.
 */

/*
 * XXX This doesn't yet export both ctl/ext chain details
 * XXX TODO: IEEE80211_MAX_CHAINS is defined in _freebsd.h, not here;
 * figure out how to pull it in!
 */
struct ieee80211_mimo_info {
        int8_t          rssi[3];        /* per-antenna rssi */
        int8_t          noise[3];       /* per-antenna noise floor */
        uint8_t         pad[2];
        uint32_t        evm[3];         /* EVM data */
};
#endif /* _NET80211__IEEE80211_H_ */