ieee80211.h

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/*-
 * 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.
 *
 * $FreeBSD$
 */
#ifndef _NET80211_IEEE80211_H_
#define _NET80211_IEEE80211_H_
 
/*
 * 802.11 protocol definitions.
 */
 
#define IEEE80211_ADDR_LEN      6               /* size of 802.11 address */
/* is 802.11 address multicast/broadcast? */
#define IEEE80211_IS_MULTICAST(_a)      (*(_a) & 0x01)
 
#ifdef _KERNEL
extern const uint8_t ieee80211broadcastaddr[];
#endif
 
typedef uint16_t ieee80211_seq;
 
/* IEEE 802.11 PLCP header */
struct ieee80211_plcp_hdr {
        uint16_t        i_sfd;
        uint8_t         i_signal;
        uint8_t         i_service;
        uint16_t        i_length;
        uint16_t        i_crc;
} __packed;
 
#define IEEE80211_PLCP_SFD      0xF3A0 
#define IEEE80211_PLCP_SERVICE  0x00
#define IEEE80211_PLCP_SERVICE_LOCKED   0x04
#define IEEE80211_PLCL_SERVICE_PBCC     0x08
#define IEEE80211_PLCP_SERVICE_LENEXT5  0x20
#define IEEE80211_PLCP_SERVICE_LENEXT6  0x40
#define IEEE80211_PLCP_SERVICE_LENEXT7  0x80
 
/*
 * generic definitions for IEEE 802.11 frames
 */
struct ieee80211_frame {
        uint8_t         i_fc[2];
        uint8_t         i_dur[2];
        uint8_t         i_addr1[IEEE80211_ADDR_LEN];
        uint8_t         i_addr2[IEEE80211_ADDR_LEN];
        uint8_t         i_addr3[IEEE80211_ADDR_LEN];
        uint8_t         i_seq[2];
        /* possibly followed by addr4[IEEE80211_ADDR_LEN]; */
        /* see below */
} __packed;
 
struct ieee80211_qosframe {
        uint8_t         i_fc[2];
        uint8_t         i_dur[2];
        uint8_t         i_addr1[IEEE80211_ADDR_LEN];
        uint8_t         i_addr2[IEEE80211_ADDR_LEN];
        uint8_t         i_addr3[IEEE80211_ADDR_LEN];
        uint8_t         i_seq[2];
        uint8_t         i_qos[2];
        /* possibly followed by addr4[IEEE80211_ADDR_LEN]; */
        /* see below */
} __packed;
 
struct ieee80211_qoscntl {
        uint8_t         i_qos[2];
};
 
struct ieee80211_frame_addr4 {
        uint8_t         i_fc[2];
        uint8_t         i_dur[2];
        uint8_t         i_addr1[IEEE80211_ADDR_LEN];
        uint8_t         i_addr2[IEEE80211_ADDR_LEN];
        uint8_t         i_addr3[IEEE80211_ADDR_LEN];
        uint8_t         i_seq[2];
        uint8_t         i_addr4[IEEE80211_ADDR_LEN];
} __packed;
 
struct ieee80211_qosframe_addr4 {
        uint8_t         i_fc[2];
        uint8_t         i_dur[2];
        uint8_t         i_addr1[IEEE80211_ADDR_LEN];
        uint8_t         i_addr2[IEEE80211_ADDR_LEN];
        uint8_t         i_addr3[IEEE80211_ADDR_LEN];
        uint8_t         i_seq[2];
        uint8_t         i_addr4[IEEE80211_ADDR_LEN];
        uint8_t         i_qos[2];
} __packed;
 
#define IEEE80211_FC0_VERSION_MASK              0x03
#define IEEE80211_FC0_VERSION_SHIFT             0
#define IEEE80211_FC0_VERSION_0                 0x00
#define IEEE80211_FC0_TYPE_MASK                 0x0c
#define IEEE80211_FC0_TYPE_SHIFT                2
#define IEEE80211_FC0_TYPE_MGT                  0x00
#define IEEE80211_FC0_TYPE_CTL                  0x04
#define IEEE80211_FC0_TYPE_DATA                 0x08
 
#define IEEE80211_FC0_SUBTYPE_MASK              0xf0
#define IEEE80211_FC0_SUBTYPE_SHIFT             4
/* for TYPE_MGT */
#define IEEE80211_FC0_SUBTYPE_ASSOC_REQ         0x00
#define IEEE80211_FC0_SUBTYPE_ASSOC_RESP        0x10
#define IEEE80211_FC0_SUBTYPE_REASSOC_REQ       0x20
#define IEEE80211_FC0_SUBTYPE_REASSOC_RESP      0x30
#define IEEE80211_FC0_SUBTYPE_PROBE_REQ         0x40
#define IEEE80211_FC0_SUBTYPE_PROBE_RESP        0x50
#define IEEE80211_FC0_SUBTYPE_TIMING_ADV        0x60
#define IEEE80211_FC0_SUBTYPE_BEACON            0x80
#define IEEE80211_FC0_SUBTYPE_ATIM              0x90
#define IEEE80211_FC0_SUBTYPE_DISASSOC          0xa0
#define IEEE80211_FC0_SUBTYPE_AUTH              0xb0
#define IEEE80211_FC0_SUBTYPE_DEAUTH            0xc0
#define IEEE80211_FC0_SUBTYPE_ACTION            0xd0
#define IEEE80211_FC0_SUBTYPE_ACTION_NOACK      0xe0
/* for TYPE_CTL */
#define IEEE80211_FC0_SUBTYPE_CONTROL_WRAP      0x70
#define IEEE80211_FC0_SUBTYPE_BAR               0x80
#define IEEE80211_FC0_SUBTYPE_BA                0x90
#define IEEE80211_FC0_SUBTYPE_PS_POLL           0xa0
#define IEEE80211_FC0_SUBTYPE_RTS               0xb0
#define IEEE80211_FC0_SUBTYPE_CTS               0xc0
#define IEEE80211_FC0_SUBTYPE_ACK               0xd0
#define IEEE80211_FC0_SUBTYPE_CF_END            0xe0
#define IEEE80211_FC0_SUBTYPE_CF_END_ACK        0xf0
/* for TYPE_DATA (bit combination) */
#define IEEE80211_FC0_SUBTYPE_DATA              0x00
#define IEEE80211_FC0_SUBTYPE_CF_ACK            0x10
#define IEEE80211_FC0_SUBTYPE_CF_POLL           0x20
#define IEEE80211_FC0_SUBTYPE_CF_ACPL           0x30
#define IEEE80211_FC0_SUBTYPE_NODATA            0x40
#define IEEE80211_FC0_SUBTYPE_CFACK             0x50
#define IEEE80211_FC0_SUBTYPE_CFPOLL            0x60
#define IEEE80211_FC0_SUBTYPE_CF_ACK_CF_ACK     0x70
#define IEEE80211_FC0_SUBTYPE_QOS               0x80
#define IEEE80211_FC0_SUBTYPE_QOS_CFACK         0x90
#define IEEE80211_FC0_SUBTYPE_QOS_CFPOLL        0xa0
#define IEEE80211_FC0_SUBTYPE_QOS_CFACKPOLL     0xb0
#define IEEE80211_FC0_SUBTYPE_QOS_NULL          0xc0
 
#define IEEE80211_IS_MGMT(wh)                                   \
        (!! (((wh)->i_fc[0] & IEEE80211_FC0_TYPE_MASK)          \
            == IEEE80211_FC0_TYPE_MGT))
#define IEEE80211_IS_CTL(wh)                                    \
        (!! (((wh)->i_fc[0] & IEEE80211_FC0_TYPE_MASK)          \
            == IEEE80211_FC0_TYPE_CTL))
#define IEEE80211_IS_DATA(wh)                                   \
        (!! (((wh)->i_fc[0] & IEEE80211_FC0_TYPE_MASK)          \
            == IEEE80211_FC0_TYPE_DATA))
 
#define IEEE80211_FC0_QOSDATA \
        (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0)
 
#define IEEE80211_IS_QOSDATA(wh) \
        ((wh)->i_fc[0] == IEEE80211_FC0_QOSDATA)
 
#define IEEE80211_FC1_DIR_MASK                  0x03
#define IEEE80211_FC1_DIR_NODS                  0x00    /* STA->STA */
#define IEEE80211_FC1_DIR_TODS                  0x01    /* STA->AP  */
#define IEEE80211_FC1_DIR_FROMDS                0x02    /* AP ->STA */
#define IEEE80211_FC1_DIR_DSTODS                0x03    /* AP ->AP  */
 
#define IEEE80211_IS_DSTODS(wh) \
        (((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS)
 
#define IEEE80211_FC1_MORE_FRAG                 0x04
#define IEEE80211_FC1_RETRY                     0x08
#define IEEE80211_FC1_PWR_MGT                   0x10
#define IEEE80211_FC1_MORE_DATA                 0x20
#define IEEE80211_FC1_PROTECTED                 0x40
#define IEEE80211_FC1_ORDER                     0x80
 
#define IEEE80211_HAS_SEQ(type, subtype) \
        ((type) != IEEE80211_FC0_TYPE_CTL && \
        !((type) == IEEE80211_FC0_TYPE_DATA && \
         ((subtype) & IEEE80211_FC0_SUBTYPE_QOS_NULL) == \
                      IEEE80211_FC0_SUBTYPE_QOS_NULL))
#define IEEE80211_SEQ_FRAG_MASK                 0x000f
#define IEEE80211_SEQ_FRAG_SHIFT                0
#define IEEE80211_SEQ_SEQ_MASK                  0xfff0
#define IEEE80211_SEQ_SEQ_SHIFT                 4
#define IEEE80211_SEQ_RANGE                     4096
 
#define IEEE80211_SEQ_ADD(seq, incr) \
        (((seq) + (incr)) & (IEEE80211_SEQ_RANGE-1))
#define IEEE80211_SEQ_INC(seq)  IEEE80211_SEQ_ADD(seq,1)
#define IEEE80211_SEQ_SUB(a, b) \
        (((a) + IEEE80211_SEQ_RANGE - (b)) & (IEEE80211_SEQ_RANGE-1))
 
#define IEEE80211_SEQ_BA_RANGE                  2048    /* 2^11 */
#define IEEE80211_SEQ_BA_BEFORE(a, b) \
        (IEEE80211_SEQ_SUB(b, a+1) < IEEE80211_SEQ_BA_RANGE-1)
 
#define IEEE80211_NWID_LEN                      32
#define IEEE80211_MESHID_LEN                    32
 
#define IEEE80211_QOS_CTL_LEN                   2
 
#define IEEE80211_QOS_TXOP                      0x00ff
/* bit 8 is reserved */
#define IEEE80211_QOS_AMSDU                     0x80
#define IEEE80211_QOS_AMSDU_S                   7
#define IEEE80211_QOS_ACKPOLICY                 0x60
#define IEEE80211_QOS_ACKPOLICY_S               5
#define IEEE80211_QOS_ACKPOLICY_NOACK           0x20    /* No ACK required */
#define IEEE80211_QOS_ACKPOLICY_BA              0x60    /* Block ACK */
#define IEEE80211_QOS_EOSP                      0x10    /* EndOfService Period*/
#define IEEE80211_QOS_EOSP_S                    4
#define IEEE80211_QOS_TID                       0x0f
/* qos[1] byte used for all frames sent by mesh STAs in a mesh BSS */
#define IEEE80211_QOS_MC                        0x01    /* Mesh control */
/* Mesh power save level*/
#define IEEE80211_QOS_MESH_PSL                  0x02
/* Mesh Receiver Service Period Initiated */
#define IEEE80211_QOS_RSPI                      0x04
/* bits 11 to 15 reserved */
 
/* does frame have QoS sequence control data */
#define IEEE80211_QOS_HAS_SEQ(wh) \
        (((wh)->i_fc[0] & \
          (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_QOS)) == \
          (IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS))
 
/*
 * WME/802.11e information element.
 */
struct ieee80211_wme_info {
        uint8_t         wme_id;         /* IEEE80211_ELEMID_VENDOR */
        uint8_t         wme_len;        /* length in bytes */
        uint8_t         wme_oui[3];     /* 0x00, 0x50, 0xf2 */
        uint8_t         wme_type;       /* OUI type */
        uint8_t         wme_subtype;    /* OUI subtype */
        uint8_t         wme_version;    /* spec revision */
        uint8_t         wme_info;       /* QoS info */
} __packed;
 
/*
 * WME/802.11e Tspec Element
 */
struct ieee80211_wme_tspec {
        uint8_t         ts_id;
        uint8_t         ts_len;
        uint8_t         ts_oui[3];
        uint8_t         ts_oui_type;
        uint8_t         ts_oui_subtype;
        uint8_t         ts_version;
        uint8_t         ts_tsinfo[3];
        uint8_t         ts_nom_msdu[2];
        uint8_t         ts_max_msdu[2];
        uint8_t         ts_min_svc[4];
        uint8_t         ts_max_svc[4];
        uint8_t         ts_inactv_intv[4];
        uint8_t         ts_susp_intv[4];
        uint8_t         ts_start_svc[4];
        uint8_t         ts_min_rate[4];
        uint8_t         ts_mean_rate[4];
        uint8_t         ts_max_burst[4];
        uint8_t         ts_min_phy[4];
        uint8_t         ts_peak_rate[4];
        uint8_t         ts_delay[4];
        uint8_t         ts_surplus[2];
        uint8_t         ts_medium_time[2];
} __packed;
 
/*
 * WME AC parameter field
 */
struct ieee80211_wme_acparams {
        uint8_t         acp_aci_aifsn;
        uint8_t         acp_logcwminmax;
        uint16_t        acp_txop;
} __packed;
 
#define WME_NUM_AC              4       /* 4 AC categories */
#define WME_NUM_TID             16      /* 16 tids */
 
#define WME_PARAM_ACI           0x60    /* Mask for ACI field */
#define WME_PARAM_ACI_S         5       /* Shift for ACI field */
#define WME_PARAM_ACM           0x10    /* Mask for ACM bit */
#define WME_PARAM_ACM_S         4       /* Shift for ACM bit */
#define WME_PARAM_AIFSN         0x0f    /* Mask for aifsn field */
#define WME_PARAM_AIFSN_S       0       /* Shift for aifsn field */
#define WME_PARAM_LOGCWMIN      0x0f    /* Mask for CwMin field (in log) */
#define WME_PARAM_LOGCWMIN_S    0       /* Shift for CwMin field */
#define WME_PARAM_LOGCWMAX      0xf0    /* Mask for CwMax field (in log) */
#define WME_PARAM_LOGCWMAX_S    4       /* Shift for CwMax field */
 
#define WME_AC_TO_TID(_ac) (       \
        ((_ac) == WME_AC_VO) ? 6 : \
        ((_ac) == WME_AC_VI) ? 5 : \
        ((_ac) == WME_AC_BK) ? 1 : \
        0)
 
#define TID_TO_WME_AC(_tid) (      \
        ((_tid) == 0 || (_tid) == 3) ? WME_AC_BE : \
        ((_tid) < 3) ? WME_AC_BK : \
        ((_tid) < 6) ? WME_AC_VI : \
        WME_AC_VO)
 
/*
 * WME Parameter Element
 */
struct ieee80211_wme_param {
        uint8_t         param_id;
        uint8_t         param_len;
        uint8_t         param_oui[3];
        uint8_t         param_oui_type;
        uint8_t         param_oui_subtype;
        uint8_t         param_version;
        uint8_t         param_qosInfo;
#define WME_QOSINFO_COUNT       0x0f    /* Mask for param count field */
        uint8_t         param_reserved;
        struct ieee80211_wme_acparams   params_acParams[WME_NUM_AC];
} __packed;
 
/*
 * WME U-APSD qos info field defines
 */
#define WME_CAPINFO_UAPSD_EN                    0x00000080
#define WME_CAPINFO_UAPSD_VO                    0x00000001
#define WME_CAPINFO_UAPSD_VI                    0x00000002
#define WME_CAPINFO_UAPSD_BK                    0x00000004
#define WME_CAPINFO_UAPSD_BE                    0x00000008
#define WME_CAPINFO_UAPSD_ACFLAGS_SHIFT         0
#define WME_CAPINFO_UAPSD_ACFLAGS_MASK          0xF
#define WME_CAPINFO_UAPSD_MAXSP_SHIFT           5
#define WME_CAPINFO_UAPSD_MAXSP_MASK            0x3
#define WME_CAPINFO_IE_OFFSET                   8
#define WME_UAPSD_MAXSP(_qosinfo)                               \
            (((_qosinfo) >> WME_CAPINFO_UAPSD_MAXSP_SHIFT) &    \
            WME_CAPINFO_UAPSD_MAXSP_MASK)
#define WME_UAPSD_AC_ENABLED(_ac, _qosinfo)                     \
            ((1 << (3 - (_ac))) & (                             \
            ((_qosinfo) >> WME_CAPINFO_UAPSD_ACFLAGS_SHIFT) &   \
            WME_CAPINFO_UAPSD_ACFLAGS_MASK))
 
/*
 * Management Notification Frame
 */
struct ieee80211_mnf {
        uint8_t         mnf_category;
        uint8_t         mnf_action;
        uint8_t         mnf_dialog;
        uint8_t         mnf_status;
} __packed;
#define MNF_SETUP_REQ   0
#define MNF_SETUP_RESP  1
#define MNF_TEARDOWN    2
 
/* 
 * 802.11n Management Action Frames 
 */
/* generic frame format */
struct ieee80211_action {
        uint8_t         ia_category;
        uint8_t         ia_action;
} __packed;
 
#define IEEE80211_ACTION_CAT_SM         0       /* Spectrum Management */
#define IEEE80211_ACTION_CAT_QOS        1       /* QoS */
#define IEEE80211_ACTION_CAT_DLS        2       /* DLS */
#define IEEE80211_ACTION_CAT_BA         3       /* BA */
#define IEEE80211_ACTION_CAT_HT         7       /* HT */
#define IEEE80211_ACTION_CAT_MESH       13      /* Mesh */
#define IEEE80211_ACTION_CAT_SELF_PROT  15      /* Self-protected */
/* 16 - 125 reserved */
#define IEEE80211_ACTION_CAT_VHT        21
#define IEEE80211_ACTION_CAT_VENDOR     127     /* Vendor Specific */
 
#define IEEE80211_ACTION_HT_TXCHWIDTH   0       /* recommended xmit chan width*/
#define IEEE80211_ACTION_HT_MIMOPWRSAVE 1       /* MIMO power save */
 
/* HT - recommended transmission channel width */
struct ieee80211_action_ht_txchwidth {
        struct ieee80211_action at_header;
        uint8_t         at_chwidth;     
} __packed;
 
#define IEEE80211_A_HT_TXCHWIDTH_20     0
#define IEEE80211_A_HT_TXCHWIDTH_2040   1
 
/* HT - MIMO Power Save (NB: D2.04) */
struct ieee80211_action_ht_mimopowersave {
        struct ieee80211_action am_header;
        uint8_t         am_control;
} __packed;
 
#define IEEE80211_A_HT_MIMOPWRSAVE_ENA          0x01    /* PS enabled */
#define IEEE80211_A_HT_MIMOPWRSAVE_MODE         0x02
#define IEEE80211_A_HT_MIMOPWRSAVE_MODE_S       1
#define IEEE80211_A_HT_MIMOPWRSAVE_DYNAMIC      0x02    /* Dynamic Mode */
#define IEEE80211_A_HT_MIMOPWRSAVE_STATIC       0x00    /* no SM packets */
/* bits 2-7 reserved */
 
/* Block Ack actions */
#define IEEE80211_ACTION_BA_ADDBA_REQUEST       0   /* ADDBA request */
#define IEEE80211_ACTION_BA_ADDBA_RESPONSE      1   /* ADDBA response */
#define IEEE80211_ACTION_BA_DELBA               2   /* DELBA */
 
/* Block Ack Parameter Set */
#define IEEE80211_BAPS_BUFSIZ   0xffc0          /* buffer size */
#define IEEE80211_BAPS_BUFSIZ_S 6
#define IEEE80211_BAPS_TID      0x003c          /* TID */
#define IEEE80211_BAPS_TID_S    2
#define IEEE80211_BAPS_POLICY   0x0002          /* block ack policy */
#define IEEE80211_BAPS_POLICY_S 1
#define IEEE80211_BAPS_AMSDU    0x0001          /* A-MSDU permitted */
#define IEEE80211_BAPS_AMSDU_S  0
 
#define IEEE80211_BAPS_POLICY_DELAYED   (0<<IEEE80211_BAPS_POLICY_S)
#define IEEE80211_BAPS_POLICY_IMMEDIATE (1<<IEEE80211_BAPS_POLICY_S)
 
/* Block Ack Sequence Control */
#define IEEE80211_BASEQ_START   0xfff0          /* starting seqnum */
#define IEEE80211_BASEQ_START_S 4
#define IEEE80211_BASEQ_FRAG    0x000f          /* fragment number */
#define IEEE80211_BASEQ_FRAG_S  0
 
/* Delayed Block Ack Parameter Set */
#define IEEE80211_DELBAPS_TID   0xf000          /* TID */
#define IEEE80211_DELBAPS_TID_S 12
#define IEEE80211_DELBAPS_INIT  0x0800          /* initiator */
#define IEEE80211_DELBAPS_INIT_S 11
 
/* BA - ADDBA request */
struct ieee80211_action_ba_addbarequest {
        struct ieee80211_action rq_header;
        uint8_t         rq_dialogtoken;
        uint16_t        rq_baparamset;
        uint16_t        rq_batimeout;           /* in TUs */
        uint16_t        rq_baseqctl;
} __packed;
 
/* BA - ADDBA response */
struct ieee80211_action_ba_addbaresponse {
        struct ieee80211_action rs_header;
        uint8_t         rs_dialogtoken;
        uint16_t        rs_statuscode;
        uint16_t        rs_baparamset; 
        uint16_t        rs_batimeout;           /* in TUs */
} __packed;
 
/* BA - DELBA */
struct ieee80211_action_ba_delba {
        struct ieee80211_action dl_header;
        uint16_t        dl_baparamset;
        uint16_t        dl_reasoncode;
} __packed;
 
/* BAR Control */
#define IEEE80211_BAR_TID       0xf000          /* TID */
#define IEEE80211_BAR_TID_S     12
#define IEEE80211_BAR_COMP      0x0004          /* Compressed Bitmap */
#define IEEE80211_BAR_MTID      0x0002          /* Multi-TID */
#define IEEE80211_BAR_NOACK     0x0001          /* No-Ack policy */
 
/* BAR Starting Sequence Control */
#define IEEE80211_BAR_SEQ_START 0xfff0          /* starting seqnum */
#define IEEE80211_BAR_SEQ_START_S       4
 
struct ieee80211_ba_request {
        uint16_t        rq_barctl;
        uint16_t        rq_barseqctl;
} __packed;
 
/*
 * Control frames.
 */
struct ieee80211_frame_min {
        uint8_t         i_fc[2];
        uint8_t         i_dur[2];
        uint8_t         i_addr1[IEEE80211_ADDR_LEN];
        uint8_t         i_addr2[IEEE80211_ADDR_LEN];
        /* FCS */
} __packed;
 
struct ieee80211_frame_rts {
        uint8_t         i_fc[2];
        uint8_t         i_dur[2];
        uint8_t         i_ra[IEEE80211_ADDR_LEN];
        uint8_t         i_ta[IEEE80211_ADDR_LEN];
        /* FCS */
} __packed;
 
struct ieee80211_frame_cts {
        uint8_t         i_fc[2];
        uint8_t         i_dur[2];
        uint8_t         i_ra[IEEE80211_ADDR_LEN];
        /* FCS */
} __packed;
 
struct ieee80211_frame_ack {
        uint8_t         i_fc[2];
        uint8_t         i_dur[2];
        uint8_t         i_ra[IEEE80211_ADDR_LEN];
        /* FCS */
} __packed;
 
struct ieee80211_frame_pspoll {
        uint8_t         i_fc[2];
        uint8_t         i_aid[2];
        uint8_t         i_bssid[IEEE80211_ADDR_LEN];
        uint8_t         i_ta[IEEE80211_ADDR_LEN];
        /* FCS */
} __packed;
 
struct ieee80211_frame_cfend {          /* NB: also CF-End+CF-Ack */
        uint8_t         i_fc[2];
        uint8_t         i_dur[2];       /* should be zero */
        uint8_t         i_ra[IEEE80211_ADDR_LEN];
        uint8_t         i_bssid[IEEE80211_ADDR_LEN];
        /* FCS */
} __packed;
 
struct ieee80211_frame_bar {
        uint8_t         i_fc[2];
        uint8_t         i_dur[2];
        uint8_t         i_ra[IEEE80211_ADDR_LEN];
        uint8_t         i_ta[IEEE80211_ADDR_LEN];
        uint16_t        i_ctl;
        uint16_t        i_seq;
        /* FCS */
} __packed;
 
/*
 * BEACON management packets
 *
 *      octet timestamp[8]
 *      octet beacon interval[2]
 *      octet capability information[2]
 *      information element
 *              octet elemid
 *              octet length
 *              octet information[length]
 */
 
#define IEEE80211_BEACON_INTERVAL(beacon) \
        ((beacon)[8] | ((beacon)[9] << 8))
#define IEEE80211_BEACON_CAPABILITY(beacon) \
        ((beacon)[10] | ((beacon)[11] << 8))
 
#define IEEE80211_CAPINFO_ESS                   0x0001
#define IEEE80211_CAPINFO_IBSS                  0x0002
#define IEEE80211_CAPINFO_CF_POLLABLE           0x0004
#define IEEE80211_CAPINFO_CF_POLLREQ            0x0008
#define IEEE80211_CAPINFO_PRIVACY               0x0010
#define IEEE80211_CAPINFO_SHORT_PREAMBLE        0x0020
#define IEEE80211_CAPINFO_PBCC                  0x0040
#define IEEE80211_CAPINFO_CHNL_AGILITY          0x0080
#define IEEE80211_CAPINFO_SPECTRUM_MGMT         0x0100
/* bit 9 is reserved */
#define IEEE80211_CAPINFO_SHORT_SLOTTIME        0x0400
#define IEEE80211_CAPINFO_RSN                   0x0800
/* bit 12 is reserved */
#define IEEE80211_CAPINFO_DSSSOFDM              0x2000
/* bits 14-15 are reserved */
 
#define IEEE80211_CAPINFO_BITS \
        "\20\1ESS\2IBSS\3CF_POLLABLE\4CF_POLLREQ\5PRIVACY\6SHORT_PREAMBLE" \
        "\7PBCC\10CHNL_AGILITY\11SPECTRUM_MGMT\13SHORT_SLOTTIME\14RSN" \
        "\16DSSOFDM"
 
/*
 * 802.11i/WPA information element (maximally sized).
 */
struct ieee80211_ie_wpa {
        uint8_t         wpa_id;         /* IEEE80211_ELEMID_VENDOR */
        uint8_t         wpa_len;        /* length in bytes */
        uint8_t         wpa_oui[3];     /* 0x00, 0x50, 0xf2 */
        uint8_t         wpa_type;       /* OUI type */
        uint16_t        wpa_version;    /* spec revision */
        uint32_t        wpa_mcipher[1]; /* multicast/group key cipher */
        uint16_t        wpa_uciphercnt; /* # pairwise key ciphers */
        uint32_t        wpa_uciphers[8];/* ciphers */
        uint16_t        wpa_authselcnt; /* authentication selector cnt*/
        uint32_t        wpa_authsels[8];/* selectors */
        uint16_t        wpa_caps;       /* 802.11i capabilities */
        uint16_t        wpa_pmkidcnt;   /* 802.11i pmkid count */
        uint16_t        wpa_pmkids[8];  /* 802.11i pmkids */
} __packed;
 
/*
 * 802.11n HT Capability IE
 * NB: these reflect D1.10 
 */
struct ieee80211_ie_htcap {
        uint8_t         hc_id;                  /* element ID */
        uint8_t         hc_len;                 /* length in bytes */
        uint16_t        hc_cap;                 /* HT caps (see below) */
        uint8_t         hc_param;               /* HT params (see below) */
        uint8_t         hc_mcsset[16];          /* supported MCS set */
        uint16_t        hc_extcap;              /* extended HT capabilities */
        uint32_t        hc_txbf;                /* txbf capabilities */
        uint8_t         hc_antenna;             /* antenna capabilities */
} __packed;
 
/* HT capability flags (ht_cap) */
#define IEEE80211_HTCAP_LDPC            0x0001  /* LDPC rx supported */
#define IEEE80211_HTCAP_CHWIDTH40       0x0002  /* 20/40 supported */
#define IEEE80211_HTCAP_SMPS            0x000c  /* SM Power Save mode */
#define IEEE80211_HTCAP_SMPS_OFF        0x000c  /* disabled */
#define IEEE80211_HTCAP_SMPS_DYNAMIC    0x0004  /* send RTS first */
/* NB: SMPS value 2 is reserved */
#define IEEE80211_HTCAP_SMPS_ENA        0x0000  /* enabled (static mode) */
#define IEEE80211_HTCAP_GREENFIELD      0x0010  /* Greenfield supported */
#define IEEE80211_HTCAP_SHORTGI20       0x0020  /* Short GI in 20MHz */
#define IEEE80211_HTCAP_SHORTGI40       0x0040  /* Short GI in 40MHz */
#define IEEE80211_HTCAP_TXSTBC          0x0080  /* STBC tx ok */
#define IEEE80211_HTCAP_RXSTBC          0x0300  /* STBC rx support */
#define IEEE80211_HTCAP_RXSTBC_S        8
#define IEEE80211_HTCAP_RXSTBC_1STREAM  0x0100  /* 1 spatial stream */
#define IEEE80211_HTCAP_RXSTBC_2STREAM  0x0200  /* 1-2 spatial streams*/
#define IEEE80211_HTCAP_RXSTBC_3STREAM  0x0300  /* 1-3 spatial streams*/
#define IEEE80211_HTCAP_DELBA           0x0400  /* HT DELBA supported */
#define IEEE80211_HTCAP_MAXAMSDU        0x0800  /* max A-MSDU length */
#define IEEE80211_HTCAP_MAXAMSDU_7935   0x0800  /* 7935 octets */
#define IEEE80211_HTCAP_MAXAMSDU_3839   0x0000  /* 3839 octets */
#define IEEE80211_HTCAP_DSSSCCK40       0x1000  /* DSSS/CCK in 40MHz */
#define IEEE80211_HTCAP_PSMP            0x2000  /* PSMP supported */
#define IEEE80211_HTCAP_40INTOLERANT    0x4000  /* 40MHz intolerant */
#define IEEE80211_HTCAP_LSIGTXOPPROT    0x8000  /* L-SIG TXOP prot */
 
#define IEEE80211_HTCAP_BITS \
        "\20\1LDPC\2CHWIDTH40\5GREENFIELD\6SHORTGI20\7SHORTGI40\10TXSTBC" \
        "\13DELBA\14AMSDU(7935)\15DSSSCCK40\16PSMP\1740INTOLERANT" \
        "\20LSIGTXOPPROT"
 
/* HT parameters (hc_param) */
#define IEEE80211_HTCAP_MAXRXAMPDU      0x03    /* max rx A-MPDU factor */
#define IEEE80211_HTCAP_MAXRXAMPDU_S    0
#define IEEE80211_HTCAP_MAXRXAMPDU_8K   0
#define IEEE80211_HTCAP_MAXRXAMPDU_16K  1
#define IEEE80211_HTCAP_MAXRXAMPDU_32K  2
#define IEEE80211_HTCAP_MAXRXAMPDU_64K  3
#define IEEE80211_HTCAP_MPDUDENSITY     0x1c    /* min MPDU start spacing */
#define IEEE80211_HTCAP_MPDUDENSITY_S   2
#define IEEE80211_HTCAP_MPDUDENSITY_NA  0       /* no time restriction */
#define IEEE80211_HTCAP_MPDUDENSITY_025 1       /* 1/4 us */
#define IEEE80211_HTCAP_MPDUDENSITY_05  2       /* 1/2 us */
#define IEEE80211_HTCAP_MPDUDENSITY_1   3       /* 1 us */
#define IEEE80211_HTCAP_MPDUDENSITY_2   4       /* 2 us */
#define IEEE80211_HTCAP_MPDUDENSITY_4   5       /* 4 us */
#define IEEE80211_HTCAP_MPDUDENSITY_8   6       /* 8 us */
#define IEEE80211_HTCAP_MPDUDENSITY_16  7       /* 16 us */
 
/* HT extended capabilities (hc_extcap) */
#define IEEE80211_HTCAP_PCO             0x0001  /* PCO capable */
#define IEEE80211_HTCAP_PCOTRANS        0x0006  /* PCO transition time */
#define IEEE80211_HTCAP_PCOTRANS_S      1
#define IEEE80211_HTCAP_PCOTRANS_04     0x0002  /* 400 us */
#define IEEE80211_HTCAP_PCOTRANS_15     0x0004  /* 1.5 ms */
#define IEEE80211_HTCAP_PCOTRANS_5      0x0006  /* 5 ms */
/* bits 3-7 reserved */
#define IEEE80211_HTCAP_MCSFBACK        0x0300  /* MCS feedback */
#define IEEE80211_HTCAP_MCSFBACK_S      8
#define IEEE80211_HTCAP_MCSFBACK_NONE   0x0000  /* nothing provided */
#define IEEE80211_HTCAP_MCSFBACK_UNSOL  0x0200  /* unsolicited feedback */
#define IEEE80211_HTCAP_MCSFBACK_MRQ    0x0300  /* " "+respond to MRQ */
#define IEEE80211_HTCAP_HTC             0x0400  /* +HTC support */
#define IEEE80211_HTCAP_RDR             0x0800  /* reverse direction responder*/
/* bits 12-15 reserved */
 
/*
 * 802.11n HT Information IE
 */
struct ieee80211_ie_htinfo {
        uint8_t         hi_id;                  /* element ID */
        uint8_t         hi_len;                 /* length in bytes */
        uint8_t         hi_ctrlchannel;         /* primary channel */
        uint8_t         hi_byte1;               /* ht ie byte 1 */
        uint8_t         hi_byte2;               /* ht ie byte 2 */
        uint8_t         hi_byte3;               /* ht ie byte 3 */
        uint16_t        hi_byte45;              /* ht ie bytes 4+5 */
        uint8_t         hi_basicmcsset[16];     /* basic MCS set */
} __packed;
 
/* byte1 */
#define IEEE80211_HTINFO_2NDCHAN        0x03    /* secondary/ext chan offset */
#define IEEE80211_HTINFO_2NDCHAN_S      0
#define IEEE80211_HTINFO_2NDCHAN_NONE   0x00    /* no secondary/ext channel */
#define IEEE80211_HTINFO_2NDCHAN_ABOVE  0x01    /* above private channel */
/* NB: 2 is reserved */
#define IEEE80211_HTINFO_2NDCHAN_BELOW  0x03    /* below primary channel */ 
#define IEEE80211_HTINFO_TXWIDTH        0x04    /* tx channel width */
#define IEEE80211_HTINFO_TXWIDTH_20     0x00    /* 20MHz width */
#define IEEE80211_HTINFO_TXWIDTH_2040   0x04    /* any supported width */
#define IEEE80211_HTINFO_RIFSMODE       0x08    /* Reduced IFS (RIFS) use */
#define IEEE80211_HTINFO_RIFSMODE_PROH  0x00    /* RIFS use prohibited */
#define IEEE80211_HTINFO_RIFSMODE_PERM  0x08    /* RIFS use permitted */
#define IEEE80211_HTINFO_PMSPONLY       0x10    /* PSMP required to associate */
#define IEEE80211_HTINFO_SIGRAN         0xe0    /* shortest Service Interval */
#define IEEE80211_HTINFO_SIGRAN_S       5
#define IEEE80211_HTINFO_SIGRAN_5       0x00    /* 5 ms */
/* XXX add rest */
 
/* bytes 2+3 */
#define IEEE80211_HTINFO_OPMODE         0x03    /* operating mode */
#define IEEE80211_HTINFO_OPMODE_S       0
#define IEEE80211_HTINFO_OPMODE_PURE    0x00    /* no protection */
#define IEEE80211_HTINFO_OPMODE_PROTOPT 0x01    /* protection optional */
#define IEEE80211_HTINFO_OPMODE_HT20PR  0x02    /* protection for HT20 sta's */
#define IEEE80211_HTINFO_OPMODE_MIXED   0x03    /* protection for legacy sta's*/
#define IEEE80211_HTINFO_NONGF_PRESENT  0x04    /* non-GF sta's present */
#define IEEE80211_HTINFO_TXBL           0x08    /* transmit burst limit */
#define IEEE80211_HTINFO_NONHT_PRESENT  0x10    /* non-HT sta's present */
/* bits 5-15 reserved */
 
/* bytes 4+5 */
#define IEEE80211_HTINFO_2NDARYBEACON   0x01
#define IEEE80211_HTINFO_LSIGTXOPPROT   0x02
#define IEEE80211_HTINFO_PCO_ACTIVE     0x04
#define IEEE80211_HTINFO_40MHZPHASE     0x08
 
/* byte5 */
#define IEEE80211_HTINFO_BASIC_STBCMCS  0x7f
#define IEEE80211_HTINFO_BASIC_STBCMCS_S 0
#define IEEE80211_HTINFO_DUALPROTECTED  0x80
 
/*
 * 802.11ac definitions - 802.11ac-2013 .
 */
 
/*
 * Maximum length of A-MPDU that the STA can RX in VHT.
 * Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
 */
#define IEEE80211_VHTCAP_MAX_AMPDU_8K           0
#define IEEE80211_VHTCAP_MAX_AMPDU_16K          1
#define IEEE80211_VHTCAP_MAX_AMPDU_32K          2
#define IEEE80211_VHTCAP_MAX_AMPDU_64K          3
#define IEEE80211_VHTCAP_MAX_AMPDU_128K         4
#define IEEE80211_VHTCAP_MAX_AMPDU_256K         5
#define IEEE80211_VHTCAP_MAX_AMPDU_512K         6
#define IEEE80211_VHTCAP_MAX_AMPDU_1024K        7
 
/*
 * VHT MCS information.
 * + rx_highest/tx_highest: optional; maximum long GI VHT PPDU
 *    data rate.  1Mbit/sec units.
 * + rx_mcs_map/tx_mcs_map: bitmap of per-stream supported MCS;
 *    2 bits each.
 */
#define IEEE80211_VHT_MCS_SUPPORT_0_7           0       /* MCS0-7 */
#define IEEE80211_VHT_MCS_SUPPORT_0_8           1       /* MCS0-8 */
#define IEEE80211_VHT_MCS_SUPPORT_0_9           2       /* MCS0-9 */
#define IEEE80211_VHT_MCS_NOT_SUPPORTED         3       /* not supported */
 
struct ieee80211_vht_mcs_info {
        uint16_t rx_mcs_map;
        uint16_t rx_highest;
        uint16_t tx_mcs_map;
        uint16_t tx_highest;
} __packed;
 
/* VHT capabilities element: 802.11ac-2013 8.4.2.160 */
struct ieee80211_ie_vhtcap {
        uint8_t ie;
        uint8_t len;
        uint32_t vht_cap_info;
        struct ieee80211_vht_mcs_info supp_mcs;
} __packed;
 
/* VHT operation mode subfields - 802.11ac-2013 Table 8.183x */
#define IEEE80211_VHT_CHANWIDTH_USE_HT          0       /* Use HT IE for chw */
#define IEEE80211_VHT_CHANWIDTH_80MHZ           1       /* 80MHz */
#define IEEE80211_VHT_CHANWIDTH_160MHZ          2       /* 160MHz */
#define IEEE80211_VHT_CHANWIDTH_80P80MHZ        3       /* 80+80MHz */
 
/* VHT operation IE - 802.11ac-2013 8.4.2.161 */
struct ieee80211_ie_vht_operation {
        uint8_t ie;
        uint8_t len;
        uint8_t chan_width;
        uint8_t center_freq_seg1_idx;
        uint8_t center_freq_seg2_idx;
        uint16_t basic_mcs_set;
} __packed;
 
/* 802.11ac VHT Capabilities */
#define IEEE80211_VHTCAP_MAX_MPDU_LENGTH_3895   0x00000000
#define IEEE80211_VHTCAP_MAX_MPDU_LENGTH_7991   0x00000001
#define IEEE80211_VHTCAP_MAX_MPDU_LENGTH_11454  0x00000002
#define IEEE80211_VHTCAP_MAX_MPDU_MASK          0x00000003
#define IEEE80211_VHTCAP_MAX_MPDU_MASK_S        0
 
#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK   0x0000000C
#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK_S 2
#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_NONE           0
#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_160MHZ         1
#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_160_80P80MHZ   2
#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_RESERVED       3
 
#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160MHZ(_vhtcaps)            \
    (_IEEE80211_MASKSHIFT(_vhtcaps, IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) >= \
            IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_160MHZ)
#define IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160_80P80MHZ(_vhtcaps)      \
    (_IEEE80211_MASKSHIFT(_vhtcaps, IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) == \
            IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_160_80P80MHZ)
 
#define IEEE80211_VHTCAP_RXLDPC         0x00000010
#define IEEE80211_VHTCAP_RXLDPC_S       4
 
#define IEEE80211_VHTCAP_SHORT_GI_80            0x00000020
#define IEEE80211_VHTCAP_SHORT_GI_80_S          5
 
#define IEEE80211_VHTCAP_SHORT_GI_160           0x00000040
#define IEEE80211_VHTCAP_SHORT_GI_160_S         6
 
#define IEEE80211_VHTCAP_TXSTBC         0x00000080
#define IEEE80211_VHTCAP_TXSTBC_S       7
 
#define IEEE80211_VHTCAP_RXSTBC_1               0x00000100
#define IEEE80211_VHTCAP_RXSTBC_2               0x00000200
#define IEEE80211_VHTCAP_RXSTBC_3               0x00000300
#define IEEE80211_VHTCAP_RXSTBC_4               0x00000400
#define IEEE80211_VHTCAP_RXSTBC_MASK            0x00000700
#define IEEE80211_VHTCAP_RXSTBC_MASK_S          8
 
#define IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE  0x00000800
#define IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE_S        11
 
#define IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE  0x00001000
#define IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE_S        12
 
#define IEEE80211_VHTCAP_BEAMFORMEE_STS_SHIFT   13
#define IEEE80211_VHTCAP_BEAMFORMEE_STS_MASK \
            (7 << IEEE80211_VHTCAP_BEAMFORMEE_STS_SHIFT)
#define IEEE80211_VHTCAP_BEAMFORMEE_STS_MASK_S  13
 
#define IEEE80211_VHTCAP_SOUNDING_DIMENSIONS_SHIFT      16
#define IEEE80211_VHTCAP_SOUNDING_DIMENSIONS_MASK \
            (7 << IEEE80211_VHTCAP_SOUNDING_DIMENSIONS_SHIFT)
#define IEEE80211_VHTCAP_SOUNDING_DIMENSIONS_MASK_S     16
 
#define IEEE80211_VHTCAP_MU_BEAMFORMER_CAPABLE  0x00080000
#define IEEE80211_VHTCAP_MU_BEAMFORMER_CAPABLE_S        19
#define IEEE80211_VHTCAP_MU_BEAMFORMEE_CAPABLE  0x00100000
#define IEEE80211_VHTCAP_MU_BEAMFORMEE_CAPABLE_S        20
#define IEEE80211_VHTCAP_VHT_TXOP_PS            0x00200000
#define IEEE80211_VHTCAP_VHT_TXOP_PS_S          21
#define IEEE80211_VHTCAP_HTC_VHT                0x00400000
#define IEEE80211_VHTCAP_HTC_VHT_S              22
 
#define IEEE80211_VHTCAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT       23
#define IEEE80211_VHTCAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK \
            (7 << IEEE80211_VHTCAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT)
#define IEEE80211_VHTCAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK_S      23
 
#define IEEE80211_VHTCAP_VHT_LINK_ADAPTATION_VHT_MASK   0x0c000000
#define IEEE80211_VHTCAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB      0x08000000
#define IEEE80211_VHTCAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB        0x0c000000
#define IEEE80211_VHTCAP_VHT_LINK_ADAPTATION_VHT_MASK_S 26
 
#define IEEE80211_VHTCAP_RX_ANTENNA_PATTERN     0x10000000
#define IEEE80211_VHTCAP_RX_ANTENNA_PATTERN_S   28
#define IEEE80211_VHTCAP_TX_ANTENNA_PATTERN     0x20000000
#define IEEE80211_VHTCAP_TX_ANTENNA_PATTERN_S   29
 
/*
 * XXX TODO: add the rest of the bits
 */
#define IEEE80211_VHTCAP_BITS \
        "\20\1MPDU7991\2MPDU11454\3CHAN160\4CHAN8080\5RXLDPC\6SHORTGI80" \
        "\7SHORTGI160\10RXSTBC1\11RXSTBC2\12RXSTBC3\13RXSTBC4\14BFERCAP" \
        "\15BFEECAP\27VHT\37RXANTPTN\40TXANTPTN"
 
/*
 * VHT Transmit Power Envelope element - 802.11ac-2013 8.4.2.164
 *
 * This defines the maximum transmit power for various bandwidths.
 */
/*
 * Count is how many elements follow and what they're for:
 *
 * 0 - 20 MHz
 * 1 - 20+40 MHz
 * 2 - 20+40+80 MHz
 * 3 - 20+40+80+(160, 80+80) MHz
 */
#define IEEE80211_VHT_TXPWRENV_INFO_COUNT_SHIFT 0
#define IEEE80211_VHT_TXPWRENV_INFO_COUNT_MASK  0x07
 
/*
 * Unit is the tx power representation.  It should be EIRP for now;
 * other values are reserved.
 */
#define IEEE80211_VHT_TXPWRENV_UNIT_MASK        0x38
#define IEEE80211_VHT_TXPWRENV_UNIT_SHIFT       3
 
/* This value is within the unit mask/shift above */
#define IEEE80211_VHT_TXPWRENV_UNIT_EIRP        0
 
struct ieee80211_ie_vht_txpwrenv {
        uint8_t ie;
        uint8_t len;
        uint8_t tx_info;
        int8_t tx_elem[0];      /* TX power elements, 1/2 dB, signed */
};
 
/* VHT action codes */
#define WLAN_ACTION_VHT_COMPRESSED_BF           0
#define WLAN_ACTION_VHT_GROUPID_MGMT            1
#define WLAN_ACTION_VHT_OPMODE_NOTIF            2
 
/*
 * Management information element payloads.
 */
 
enum {
        IEEE80211_ELEMID_SSID           = 0,
        IEEE80211_ELEMID_RATES          = 1,
        IEEE80211_ELEMID_FHPARMS        = 2,
        IEEE80211_ELEMID_DSPARMS        = 3,
        IEEE80211_ELEMID_CFPARMS        = 4,
        IEEE80211_ELEMID_TIM            = 5,
        IEEE80211_ELEMID_IBSSPARMS      = 6,
        IEEE80211_ELEMID_COUNTRY        = 7,
        IEEE80211_ELEMID_BSSLOAD        = 11,
        IEEE80211_ELEMID_TSPEC          = 13,
        IEEE80211_ELEMID_TCLAS          = 14,
        IEEE80211_ELEMID_CHALLENGE      = 16,
        /* 17-31 reserved for challenge text extension */
        IEEE80211_ELEMID_PWRCNSTR       = 32,
        IEEE80211_ELEMID_PWRCAP         = 33,
        IEEE80211_ELEMID_TPCREQ         = 34,
        IEEE80211_ELEMID_TPCREP         = 35,
        IEEE80211_ELEMID_SUPPCHAN       = 36,
        IEEE80211_ELEMID_CSA            = 37,
        IEEE80211_ELEMID_MEASREQ        = 38,
        IEEE80211_ELEMID_MEASREP        = 39,
        IEEE80211_ELEMID_QUIET          = 40,
        IEEE80211_ELEMID_IBSSDFS        = 41,
        IEEE80211_ELEMID_ERP            = 42,
        IEEE80211_ELEMID_HTCAP          = 45,
        IEEE80211_ELEMID_QOS            = 46,
        IEEE80211_ELEMID_RESERVED_47    = 47,
        IEEE80211_ELEMID_RSN            = 48,
        IEEE80211_ELEMID_XRATES         = 50,
        IEEE80211_ELEMID_APCHANREP      = 51,
        IEEE80211_ELEMID_MOBILITY_DOMAIN        = 54,
        IEEE80211_ELEMID_HTINFO         = 61,
        IEEE80211_ELEMID_SECCHAN_OFFSET = 62,
        IEEE80211_ELEMID_RRM_ENACAPS    = 70,
        IEEE80211_ELEMID_MULTIBSSID     = 71,
        IEEE80211_ELEMID_COEX_2040      = 72,
        IEEE80211_ELEMID_INTOL_CHN_REPORT       = 73,
        IEEE80211_ELEMID_OVERLAP_BSS_SCAN_PARAM = 74,
        IEEE80211_ELEMID_TSF_REQ        = 91,
        IEEE80211_ELEMID_TSF_RESP       = 92,
        IEEE80211_ELEMID_WNM_SLEEP_MODE = 93,
        IEEE80211_ELEMID_TIM_BCAST_REQ  = 94,
        IEEE80211_ELEMID_TIM_BCAST_RESP = 95,
        IEEE80211_ELEMID_TPC            = 150,
        IEEE80211_ELEMID_CCKM           = 156,
        IEEE80211_ELEMID_VENDOR         = 221,  /* vendor private */
 
        /*
         * 802.11s IEs
         * NB: On vanilla Linux still IEEE80211_ELEMID_MESHPEER = 55,
         * but they defined a new with id 117 called PEER_MGMT.
         * NB: complies with open80211
         */
        IEEE80211_ELEMID_MESHCONF       = 113,
        IEEE80211_ELEMID_MESHID         = 114,
        IEEE80211_ELEMID_MESHLINK       = 115,
        IEEE80211_ELEMID_MESHCNGST      = 116,
        IEEE80211_ELEMID_MESHPEER       = 117,
        IEEE80211_ELEMID_MESHCSA        = 118,
        IEEE80211_ELEMID_MESHTIM        = 39, /* XXX: remove */
        IEEE80211_ELEMID_MESHAWAKEW     = 119,
        IEEE80211_ELEMID_MESHBEACONT    = 120,
        /* 121-124 MMCAOP not implemented yet */
        IEEE80211_ELEMID_MESHGANN       = 125,
        IEEE80211_ELEMID_MESHRANN       = 126,
        /* 127 Extended Capabilities */
        IEEE80211_ELEMID_EXTCAP         = 127,
        /* 128-129 reserved */
        IEEE80211_ELEMID_MESHPREQ       = 130,
        IEEE80211_ELEMID_MESHPREP       = 131,
        IEEE80211_ELEMID_MESHPERR       = 132,
        /* 133-136 reserved */
        IEEE80211_ELEMID_MESHPXU        = 137,
        IEEE80211_ELEMID_MESHPXUC       = 138,
        IEEE80211_ELEMID_MESHAH         = 60, /* XXX: remove */
 
        /* 802.11ac */
        IEEE80211_ELEMID_VHT_CAP        = 191,
        IEEE80211_ELEMID_VHT_OPMODE     = 192,
        IEEE80211_ELEMID_VHT_PWR_ENV    = 195,
};
 
struct ieee80211_tim_ie {
        uint8_t         tim_ie;                 /* IEEE80211_ELEMID_TIM */
        uint8_t         tim_len;
        uint8_t         tim_count;              /* DTIM count */
        uint8_t         tim_period;             /* DTIM period */
        uint8_t         tim_bitctl;             /* bitmap control */
        uint8_t         tim_bitmap[1];          /* variable-length bitmap */
} __packed;
 
struct ieee80211_country_ie {
        uint8_t         ie;                     /* IEEE80211_ELEMID_COUNTRY */
        uint8_t         len;
        uint8_t         cc[3];                  /* ISO CC+(I)ndoor/(O)utdoor */
        struct {
                uint8_t schan;                  /* starting channel */
                uint8_t nchan;                  /* number channels */
                uint8_t maxtxpwr;               /* tx power cap */
        } __packed band[1];                     /* sub bands (NB: var size) */
} __packed;
 
#define IEEE80211_COUNTRY_MAX_BANDS     84      /* max possible bands */
#define IEEE80211_COUNTRY_MAX_SIZE \
        (sizeof(struct ieee80211_country_ie) + 3*(IEEE80211_COUNTRY_MAX_BANDS-1))
 
struct ieee80211_bss_load_ie {
        uint8_t         ie;
        uint8_t         len;
        uint16_t        sta_count;      /* station count */
        uint8_t         chan_load;      /* channel utilization */
        uint8_t         aac;            /* available admission capacity */
} __packed;
 
struct ieee80211_ap_chan_report_ie {
        uint8_t         ie;
        uint8_t         len;
        uint8_t         i_class; /* operating class */
        /* Annex E, E.1 Country information and operating classes */
        uint8_t         chan_list[0];
} __packed;
 
#define IEEE80211_EXTCAP_CMS                    (1ULL <<  0) /* 20/40 BSS coexistence management support */
#define IEEE80211_EXTCAP_RSVD_1                 (1ULL <<  1)
#define IEEE80211_EXTCAP_ECS                    (1ULL <<  2) /* extended channel switching */
#define IEEE80211_EXTCAP_RSVD_3                 (1ULL <<  3)
#define IEEE80211_EXTCAP_PSMP_CAP               (1ULL <<  4) /* PSMP capability */
#define IEEE80211_EXTCAP_RSVD_5                 (1ULL <<  5)
#define IEEE80211_EXTCAP_S_PSMP_SUPP            (1ULL <<  6)
#define IEEE80211_EXTCAP_EVENT                  (1ULL <<  7)
#define IEEE80211_EXTCAP_DIAGNOSTICS            (1ULL <<  8)
#define IEEE80211_EXTCAP_MCAST_DIAG             (1ULL <<  9)
#define IEEE80211_EXTCAP_LOC_TRACKING           (1ULL << 10)
#define IEEE80211_EXTCAP_FMS                    (1ULL << 11)
#define IEEE80211_EXTCAP_PROXY_ARP              (1ULL << 12)
#define IEEE80211_EXTCAP_CIR                    (1ULL << 13) /* collocated interference reporting */
#define IEEE80211_EXTCAP_CIVIC_LOC              (1ULL << 14)
#define IEEE80211_EXTCAP_GEOSPATIAL_LOC         (1ULL << 15)
#define IEEE80211_EXTCAP_TFS                    (1ULL << 16)
#define IEEE80211_EXTCAP_WNM_SLEEPMODE          (1ULL << 17)
#define IEEE80211_EXTCAP_TIM_BROADCAST          (1ULL << 18)
#define IEEE80211_EXTCAP_BSS_TRANSITION         (1ULL << 19)
#define IEEE80211_EXTCAP_QOS_TRAF_CAP           (1ULL << 20)
#define IEEE80211_EXTCAP_AC_STA_COUNT           (1ULL << 21)
#define IEEE80211_EXTCAP_M_BSSID                (1ULL << 22) /* multiple BSSID field */
#define IEEE80211_EXTCAP_TIMING_MEAS            (1ULL << 23)
#define IEEE80211_EXTCAP_CHAN_USAGE             (1ULL << 24)
#define IEEE80211_EXTCAP_SSID_LIST              (1ULL << 25)
#define IEEE80211_EXTCAP_DMS                    (1ULL << 26)
#define IEEE80211_EXTCAP_UTC_TSF_OFFSET         (1ULL << 27)
#define IEEE80211_EXTCAP_TLDS_BUF_STA_SUPP      (1ULL << 28) /* TDLS peer U-APSP buffer STA support */
#define IEEE80211_EXTCAP_TLDS_PPSM_SUPP         (1ULL << 29) /* TDLS peer PSM support */
#define IEEE80211_EXTCAP_TLDS_CH_SW             (1ULL << 30) /* TDLS channel switching */
#define IEEE80211_EXTCAP_INTERWORKING           (1ULL << 31)
#define IEEE80211_EXTCAP_QOSMAP                 (1ULL << 32)
#define IEEE80211_EXTCAP_EBR                    (1ULL << 33)
#define IEEE80211_EXTCAP_SSPN_IF                (1ULL << 34)
#define IEEE80211_EXTCAP_RSVD_35                (1ULL << 35)
#define IEEE80211_EXTCAP_MSGCF_CAP              (1ULL << 36)
#define IEEE80211_EXTCAP_TLDS_SUPP              (1ULL << 37)
#define IEEE80211_EXTCAP_TLDS_PROHIB            (1ULL << 38)
#define IEEE80211_EXTCAP_TLDS_CH_SW_PROHIB      (1ULL << 39) /* TDLS channel switching prohibited */
#define IEEE80211_EXTCAP_RUF                    (1ULL << 40) /* reject unadmitted frame */
/* service interval granularity */
#define IEEE80211_EXTCAP_SIG \
                                ((1ULL << 41) | (1ULL << 42) | (1ULL << 43))
#define IEEE80211_EXTCAP_ID_LOC                 (1ULL << 44)
#define IEEE80211_EXTCAP_U_APSD_COEX            (1ULL << 45)
#define IEEE80211_EXTCAP_WNM_NOTIFICATION       (1ULL << 46)
#define IEEE80211_EXTCAP_RSVD_47                (1ULL << 47)
#define IEEE80211_EXTCAP_SSID                   (1ULL << 48) /* UTF-8 SSID */
/* bits 49-n are reserved */
 
struct ieee80211_extcap_ie {
        uint8_t         ie;
        uint8_t         len;
} __packed;
 
/*
 * 802.11h Quiet Time Element.
 */
struct ieee80211_quiet_ie {
        uint8_t         quiet_ie;               /* IEEE80211_ELEMID_QUIET */
        uint8_t         len;
        uint8_t         tbttcount;              /* quiet start */
        uint8_t         period;                 /* beacon intervals between quiets */
        uint16_t        duration;               /* TUs of each quiet*/
        uint16_t        offset;                 /* TUs of from TBTT of quiet start */
} __packed;
 
/*
 * 802.11h Channel Switch Announcement (CSA).
 */
struct ieee80211_csa_ie {
        uint8_t         csa_ie;         /* IEEE80211_ELEMID_CHANSWITCHANN */
        uint8_t         csa_len;
        uint8_t         csa_mode;               /* Channel Switch Mode */
        uint8_t         csa_newchan;            /* New Channel Number */
        uint8_t         csa_count;              /* Channel Switch Count */
} __packed;
 
/*
 * Note the min acceptable CSA count is used to guard against
 * malicious CSA injection in station mode.  Defining this value
 * as other than 0 violates the 11h spec.
 */
#define IEEE80211_CSA_COUNT_MIN 2
#define IEEE80211_CSA_COUNT_MAX 255
 
/* rate set entries are in .5 Mb/s units, and potentially marked as basic */
#define IEEE80211_RATE_BASIC            0x80
#define IEEE80211_RATE_VAL              0x7f
#define IEEE80211_RV(v)                 ((v) & IEEE80211_RATE_VAL)
 
/* ERP information element flags */
#define IEEE80211_ERP_NON_ERP_PRESENT   0x01
#define IEEE80211_ERP_USE_PROTECTION    0x02
#define IEEE80211_ERP_LONG_PREAMBLE     0x04
 
#define IEEE80211_ERP_BITS \
        "\20\1NON_ERP_PRESENT\2USE_PROTECTION\3LONG_PREAMBLE"
 
#define ATH_OUI                 0x7f0300        /* Atheros OUI */
#define ATH_OUI_TYPE            0x01            /* Atheros protocol ie */
 
/* NB: Atheros allocated the OUI for this purpose ~2005 but beware ... */
#define TDMA_OUI                ATH_OUI
#define TDMA_OUI_TYPE           0x02            /* TDMA protocol ie */
 
#define BCM_OUI                 0x4c9000        /* Broadcom OUI */
#define BCM_OUI_HTCAP           51              /* pre-draft HTCAP ie */
#define BCM_OUI_HTINFO          52              /* pre-draft HTINFO ie */
 
#define WPA_OUI                 0xf25000
#define WPA_OUI_TYPE            0x01
#define WPA_VERSION             1               /* current supported version */
 
#define WPA_CSE_NULL            0x00
#define WPA_CSE_WEP40           0x01
#define WPA_CSE_TKIP            0x02
#define WPA_CSE_CCMP            0x04
#define WPA_CSE_WEP104          0x05
 
#define WPA_ASE_NONE            0x00
#define WPA_ASE_8021X_UNSPEC    0x01
#define WPA_ASE_8021X_PSK       0x02
 
#define WPS_OUI_TYPE            0x04
 
#define RSN_OUI                 0xac0f00
#define RSN_VERSION             1               /* current supported version */
 
#define RSN_CSE_NULL            0x00
#define RSN_CSE_WEP40           0x01
#define RSN_CSE_TKIP            0x02
#define RSN_CSE_WRAP            0x03
#define RSN_CSE_CCMP            0x04
#define RSN_CSE_WEP104          0x05
 
#define RSN_ASE_NONE            0x00
#define RSN_ASE_8021X_UNSPEC    0x01
#define RSN_ASE_8021X_PSK       0x02
 
#define RSN_CAP_PREAUTH         0x01
 
#define WME_OUI                 0xf25000
#define WME_OUI_TYPE            0x02
#define WME_INFO_OUI_SUBTYPE    0x00
#define WME_PARAM_OUI_SUBTYPE   0x01
#define WME_VERSION             1
 
/* WME stream classes */
#define WME_AC_BE       0               /* best effort */
#define WME_AC_BK       1               /* background */
#define WME_AC_VI       2               /* video */
#define WME_AC_VO       3               /* voice */
 
/*
 * AUTH management packets
 *
 *      octet algo[2]
 *      octet seq[2]
 *      octet status[2]
 *      octet chal.id
 *      octet chal.length
 *      octet chal.text[253]            NB: 1-253 bytes
 */
 
/* challenge length for shared key auth */
#define IEEE80211_CHALLENGE_LEN         128
 
#define IEEE80211_AUTH_ALG_OPEN         0x0000
#define IEEE80211_AUTH_ALG_SHARED       0x0001
#define IEEE80211_AUTH_ALG_LEAP         0x0080
 
enum {
        IEEE80211_AUTH_OPEN_REQUEST             = 1,
        IEEE80211_AUTH_OPEN_RESPONSE            = 2,
};
 
enum {
        IEEE80211_AUTH_SHARED_REQUEST           = 1,
        IEEE80211_AUTH_SHARED_CHALLENGE         = 2,
        IEEE80211_AUTH_SHARED_RESPONSE          = 3,
        IEEE80211_AUTH_SHARED_PASS              = 4,
};
 
/*
 * Reason and status codes.
 *
 * Reason codes are used in management frames to indicate why an
 * action took place (e.g. on disassociation).  Status codes are
 * used in management frames to indicate the result of an operation.
 *
 * Unlisted codes are reserved
 */
 
enum {
        IEEE80211_REASON_UNSPECIFIED            = 1,
        IEEE80211_REASON_AUTH_EXPIRE            = 2,
        IEEE80211_REASON_AUTH_LEAVE             = 3,
        IEEE80211_REASON_ASSOC_EXPIRE           = 4,
        IEEE80211_REASON_ASSOC_TOOMANY          = 5,
        IEEE80211_REASON_NOT_AUTHED             = 6,
        IEEE80211_REASON_NOT_ASSOCED            = 7,
        IEEE80211_REASON_ASSOC_LEAVE            = 8,
        IEEE80211_REASON_ASSOC_NOT_AUTHED       = 9,
        IEEE80211_REASON_DISASSOC_PWRCAP_BAD    = 10,   /* 11h */
        IEEE80211_REASON_DISASSOC_SUPCHAN_BAD   = 11,   /* 11h */
        IEEE80211_REASON_IE_INVALID             = 13,   /* 11i */
        IEEE80211_REASON_MIC_FAILURE            = 14,   /* 11i */
        IEEE80211_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,   /* 11i */
        IEEE80211_REASON_GROUP_KEY_UPDATE_TIMEOUT = 16, /* 11i */
        IEEE80211_REASON_IE_IN_4WAY_DIFFERS     = 17,   /* 11i */
        IEEE80211_REASON_GROUP_CIPHER_INVALID   = 18,   /* 11i */
        IEEE80211_REASON_PAIRWISE_CIPHER_INVALID= 19,   /* 11i */
        IEEE80211_REASON_AKMP_INVALID           = 20,   /* 11i */
        IEEE80211_REASON_UNSUPP_RSN_IE_VERSION  = 21,   /* 11i */
        IEEE80211_REASON_INVALID_RSN_IE_CAP     = 22,   /* 11i */
        IEEE80211_REASON_802_1X_AUTH_FAILED     = 23,   /* 11i */
        IEEE80211_REASON_CIPHER_SUITE_REJECTED  = 24,   /* 11i */
        IEEE80211_REASON_UNSPECIFIED_QOS        = 32,   /* 11e */
        IEEE80211_REASON_INSUFFICIENT_BW        = 33,   /* 11e */
        IEEE80211_REASON_TOOMANY_FRAMES         = 34,   /* 11e */
        IEEE80211_REASON_OUTSIDE_TXOP           = 35,   /* 11e */
        IEEE80211_REASON_LEAVING_QBSS           = 36,   /* 11e */
        IEEE80211_REASON_BAD_MECHANISM          = 37,   /* 11e */
        IEEE80211_REASON_SETUP_NEEDED           = 38,   /* 11e */
        IEEE80211_REASON_TIMEOUT                = 39,   /* 11e */
 
        IEEE80211_REASON_PEER_LINK_CANCELED     = 52,   /* 11s */
        IEEE80211_REASON_MESH_MAX_PEERS         = 53,   /* 11s */
        IEEE80211_REASON_MESH_CPVIOLATION       = 54,   /* 11s */
        IEEE80211_REASON_MESH_CLOSE_RCVD        = 55,   /* 11s */
        IEEE80211_REASON_MESH_MAX_RETRIES       = 56,   /* 11s */
        IEEE80211_REASON_MESH_CONFIRM_TIMEOUT   = 57,   /* 11s */
        IEEE80211_REASON_MESH_INVALID_GTK       = 58,   /* 11s */
        IEEE80211_REASON_MESH_INCONS_PARAMS     = 59,   /* 11s */
        IEEE80211_REASON_MESH_INVALID_SECURITY  = 60,   /* 11s */
        IEEE80211_REASON_MESH_PERR_NO_PROXY     = 61,   /* 11s */
        IEEE80211_REASON_MESH_PERR_NO_FI        = 62,   /* 11s */
        IEEE80211_REASON_MESH_PERR_DEST_UNREACH = 63,   /* 11s */
        IEEE80211_REASON_MESH_MAC_ALRDY_EXISTS_MBSS = 64, /* 11s */
        IEEE80211_REASON_MESH_CHAN_SWITCH_REG   = 65,   /* 11s */
        IEEE80211_REASON_MESH_CHAN_SWITCH_UNSPEC = 66,  /* 11s */
 
        IEEE80211_STATUS_SUCCESS                = 0,
        IEEE80211_STATUS_UNSPECIFIED            = 1,
        IEEE80211_STATUS_CAPINFO                = 10,
        IEEE80211_STATUS_NOT_ASSOCED            = 11,
        IEEE80211_STATUS_OTHER                  = 12,
        IEEE80211_STATUS_ALG                    = 13,
        IEEE80211_STATUS_SEQUENCE               = 14,
        IEEE80211_STATUS_CHALLENGE              = 15,
        IEEE80211_STATUS_TIMEOUT                = 16,
        IEEE80211_STATUS_TOOMANY                = 17,
        IEEE80211_STATUS_BASIC_RATE             = 18,
        IEEE80211_STATUS_SP_REQUIRED            = 19,   /* 11b */
        IEEE80211_STATUS_PBCC_REQUIRED          = 20,   /* 11b */
        IEEE80211_STATUS_CA_REQUIRED            = 21,   /* 11b */
        IEEE80211_STATUS_SPECMGMT_REQUIRED      = 22,   /* 11h */
        IEEE80211_STATUS_PWRCAP_REQUIRED        = 23,   /* 11h */
        IEEE80211_STATUS_SUPCHAN_REQUIRED       = 24,   /* 11h */
        IEEE80211_STATUS_SHORTSLOT_REQUIRED     = 25,   /* 11g */
        IEEE80211_STATUS_DSSSOFDM_REQUIRED      = 26,   /* 11g */
        IEEE80211_STATUS_MISSING_HT_CAPS        = 27,   /* 11n D3.0 */
        IEEE80211_STATUS_INVALID_IE             = 40,   /* 11i */
        IEEE80211_STATUS_GROUP_CIPHER_INVALID   = 41,   /* 11i */
        IEEE80211_STATUS_PAIRWISE_CIPHER_INVALID = 42,  /* 11i */
        IEEE80211_STATUS_AKMP_INVALID           = 43,   /* 11i */
        IEEE80211_STATUS_UNSUPP_RSN_IE_VERSION  = 44,   /* 11i */
        IEEE80211_STATUS_INVALID_RSN_IE_CAP     = 45,   /* 11i */
        IEEE80211_STATUS_CIPHER_SUITE_REJECTED  = 46,   /* 11i */
};
 
#define IEEE80211_WEP_KEYLEN            5       /* 40bit */
#define IEEE80211_WEP_IVLEN             3       /* 24bit */
#define IEEE80211_WEP_KIDLEN            1       /* 1 octet */
#define IEEE80211_WEP_CRCLEN            4       /* CRC-32 */
#define IEEE80211_WEP_TOTLEN            (IEEE80211_WEP_IVLEN + \
                                         IEEE80211_WEP_KIDLEN + \
                                         IEEE80211_WEP_CRCLEN)
#define IEEE80211_WEP_NKID              4       /* number of key ids */
 
/*
 * 802.11i defines an extended IV for use with non-WEP ciphers.
 * When the EXTIV bit is set in the key id byte an additional
 * 4 bytes immediately follow the IV for TKIP.  For CCMP the
 * EXTIV bit is likewise set but the 8 bytes represent the
 * CCMP header rather than IV+extended-IV.
 */
#define IEEE80211_WEP_EXTIV             0x20
#define IEEE80211_WEP_EXTIVLEN          4       /* extended IV length */
#define IEEE80211_WEP_MICLEN            8       /* trailing MIC */
 
#define IEEE80211_CRC_LEN               4
 
/*
 * Maximum acceptable MTU is:
 *      IEEE80211_MAX_LEN - WEP overhead - CRC -
 *              QoS overhead - RSN/WPA overhead
 * Min is arbitrarily chosen > IEEE80211_MIN_LEN.  The default
 * mtu is Ethernet-compatible; it's set by ether_ifattach.
 */
#define IEEE80211_MTU_MAX               2290
#define IEEE80211_MTU_MIN               32
 
#define IEEE80211_MAX_LEN               (2300 + IEEE80211_CRC_LEN + \
    (IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + IEEE80211_WEP_CRCLEN))
#define IEEE80211_ACK_LEN \
        (sizeof(struct ieee80211_frame_ack) + IEEE80211_CRC_LEN)
#define IEEE80211_MIN_LEN \
        (sizeof(struct ieee80211_frame_min) + IEEE80211_CRC_LEN)
 
/*
 * 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 IEEE80211_AID_DEF.
 * This number may be overridden by the driver and/or by
 * user configuration but may not be less than IEEE80211_AID_MIN
 * (see _ieee80211.h for implementation-specific settings).
 */
#define IEEE80211_AID_MAX               2007
 
#define IEEE80211_AID(b)        ((b) &~ 0xc000)
 
/* 
 * RTS frame length parameters.  The default is specified in
 * the 802.11 spec as 512; we treat it as implementation-dependent
 * so it's defined in ieee80211_var.h.  The max may be wrong
 * for jumbo frames.
 */
#define IEEE80211_RTS_MIN               1
#define IEEE80211_RTS_MAX               2346
 
/* 
 * TX fragmentation parameters.  As above for RTS, we treat
 * default as implementation-dependent so define it elsewhere.
 */
#define IEEE80211_FRAG_MIN              256
#define IEEE80211_FRAG_MAX              2346
 
/*
 * Beacon interval (TU's).  Min+max come from WiFi requirements.
 * As above, we treat default as implementation-dependent so
 * define it elsewhere.
 */
#define IEEE80211_BINTVAL_MAX   1000    /* max beacon interval (TU's) */
#define IEEE80211_BINTVAL_MIN   25      /* min beacon interval (TU's) */
 
/*
 * DTIM period (beacons).  Min+max are not really defined
 * by the protocol but we want them publicly visible so
 * define them here.
 */
#define IEEE80211_DTIM_MAX      15      /* max DTIM period */
#define IEEE80211_DTIM_MIN      1       /* min DTIM period */
 
/*
 * Beacon miss threshold (beacons).  As for DTIM, we define
 * them here to be publicly visible.  Note the max may be
 * clamped depending on device capabilities.
 */
#define IEEE80211_HWBMISS_MIN   1
#define IEEE80211_HWBMISS_MAX   255
 
/*
 * 802.11 frame duration definitions.
 */
 
struct ieee80211_duration {
        uint16_t        d_rts_dur;
        uint16_t        d_data_dur;
        uint16_t        d_plcp_len;
        uint8_t         d_residue;      /* unused octets in time slot */
};
 
/* One Time Unit (TU) is 1Kus = 1024 microseconds. */
#define IEEE80211_DUR_TU                1024
 
/* IEEE 802.11b durations for DSSS PHY in microseconds */
#define IEEE80211_DUR_DS_LONG_PREAMBLE  144
#define IEEE80211_DUR_DS_SHORT_PREAMBLE 72
 
#define IEEE80211_DUR_DS_SLOW_PLCPHDR   48
#define IEEE80211_DUR_DS_FAST_PLCPHDR   24
#define IEEE80211_DUR_DS_SLOW_ACK       112
#define IEEE80211_DUR_DS_FAST_ACK       56
#define IEEE80211_DUR_DS_SLOW_CTS       112
#define IEEE80211_DUR_DS_FAST_CTS       56
 
#define IEEE80211_DUR_DS_SLOT           20
#define IEEE80211_DUR_DS_SIFS           10
#define IEEE80211_DUR_DS_PIFS   (IEEE80211_DUR_DS_SIFS + IEEE80211_DUR_DS_SLOT)
#define IEEE80211_DUR_DS_DIFS   (IEEE80211_DUR_DS_SIFS + \
                                 2 * IEEE80211_DUR_DS_SLOT)
#define IEEE80211_DUR_DS_EIFS   (IEEE80211_DUR_DS_SIFS + \
                                 IEEE80211_DUR_DS_SLOW_ACK + \
                                 IEEE80211_DUR_DS_LONG_PREAMBLE + \
                                 IEEE80211_DUR_DS_SLOW_PLCPHDR + \
                                 IEEE80211_DUR_DIFS)
 
#endif /* _NET80211_IEEE80211_H_ */