/*-
 * 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_

#ifdef _MSC_VER
#define __PACKED__
#else
#define __PACKED__  __attribute__((packed))
#endif

/*
 * 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)

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];
    uint16_t     i_dur;
    uint8_t     i_addr1[IEEE80211_ADDR_LEN];
    uint8_t     i_addr2[IEEE80211_ADDR_LEN];
    uint8_t     i_addr3[IEEE80211_ADDR_LEN];
    uint16_t     i_seq;
    /* possibly followed by addr4[IEEE80211_ADDR_LEN]; */
    /* see below */
} __PACKED__;
enum {
    ieee80211_frame_i_fc_0 = 0,
    ieee80211_frame_i_fc_1 = 1,
    ieee80211_frame_i_dur = 2,
    ieee80211_frame_i_addr1 = 4,
    ieee80211_frame_i_addr2 = ieee80211_frame_i_addr1 + IEEE80211_ADDR_LEN,
    ieee80211_frame_i_addr3 = ieee80211_frame_i_addr2 + IEEE80211_ADDR_LEN,
    ieee80211_frame_i_seq = ieee80211_frame_i_addr3 + IEEE80211_ADDR_LEN,
    ieee80211_frame_i_END = ieee80211_frame_i_seq + 2
};


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];
    uint16_t     i_dur;
    uint8_t     i_addr1[IEEE80211_ADDR_LEN];
    uint8_t     i_addr2[IEEE80211_ADDR_LEN];
    uint8_t     i_addr3[IEEE80211_ADDR_LEN];
    uint16_t     i_seq;
    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_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_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_NULL      0xc0

#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_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_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__;

/*
 * 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_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_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];
    uint16_t    i_dur;
    uint8_t     i_ra[IEEE80211_ADDR_LEN];
    uint8_t     i_ta[IEEE80211_ADDR_LEN];
    /* FCS */
} __PACKED__;
enum {
    ieee80211_frame_rts_i_fc_0 = 0,
    ieee80211_frame_rts_i_fc_1 = 1,
    ieee80211_frame_rts_i_dur = 2,
    ieee80211_frame_rts_i_ra = 4,
    ieee80211_frame_rts_i_ta = ieee80211_frame_rts_i_ra + IEEE80211_ADDR_LEN,
    ieee80211_frame_rts_i_END = ieee80211_frame_rts_i_ta + IEEE80211_ADDR_LEN
};

struct ieee80211_frame_cts {
    uint8_t     i_fc[2];
    uint16_t    i_dur;
    uint8_t     i_ra[IEEE80211_ADDR_LEN];
    /* FCS */
} __PACKED__;
enum {
    ieee80211_frame_cts_i_fc_0 = 0,
    ieee80211_frame_cts_i_fc_1 = 1,
    ieee80211_frame_cts_i_dur = 2,
    ieee80211_frame_cts_i_ra = 4,
    ieee80211_frame_cts_i_END = 4 + IEEE80211_ADDR_LEN
};

struct ieee80211_frame_ack {
    uint8_t     i_fc[2];
    uint16_t    i_dur;
    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 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

/*
 * 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_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_RSN        = 48,
    IEEE80211_ELEMID_XRATES     = 50,
    IEEE80211_ELEMID_HTINFO     = 61,
    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 */
    /* 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 */
};

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))

/*
 * 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

/* EPR 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_ */
