ieee80211.h

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/*
 * IEEE 802.11 defines
 *
 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
 * <[email protected]>
 * Copyright (c) 2002-2003, Jouni Malinen <[email protected]>
 * Copyright (c) 2005, Devicescape Software, Inc.
 * Copyright (c) 2006, Michael Wu <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef LINUX_IEEE80211_H
#define LINUX_IEEE80211_H

#include <linux/types.h>
#include <asm/byteorder.h>

/*
 * DS bit usage
 *
 * TA = transmitter address
 * RA = receiver address
 * DA = destination address
 * SA = source address
 *
 * ToDS    FromDS  A1(RA)  A2(TA)  A3      A4      Use
 * -----------------------------------------------------------------
 *  0       0       DA      SA      BSSID   -       IBSS/DLS
 *  0       1       DA      BSSID   SA      -       AP -> STA
 *  1       0       BSSID   SA      DA      -       AP <- STA
 *  1       1       RA      TA      DA      SA      unspecified (WDS)
 */

#define FCS_LEN 4

#define IEEE80211_FCTL_VERS     0x0003
#define IEEE80211_FCTL_FTYPE        0x000c
#define IEEE80211_FCTL_STYPE        0x00f0
#define IEEE80211_FCTL_TODS     0x0100
#define IEEE80211_FCTL_FROMDS       0x0200
#define IEEE80211_FCTL_MOREFRAGS    0x0400
#define IEEE80211_FCTL_RETRY        0x0800
#define IEEE80211_FCTL_PM       0x1000
#define IEEE80211_FCTL_MOREDATA     0x2000
#define IEEE80211_FCTL_PROTECTED    0x4000
#define IEEE80211_FCTL_ORDER        0x8000
#define IEEE80211_FCTL_CTL_EXT      0x0f00

#define IEEE80211_SCTL_FRAG     0x000F
#define IEEE80211_SCTL_SEQ      0xFFF0

#define IEEE80211_FTYPE_MGMT        0x0000
#define IEEE80211_FTYPE_CTL     0x0004
#define IEEE80211_FTYPE_DATA        0x0008
#define IEEE80211_FTYPE_EXT     0x000c

/* management */
#define IEEE80211_STYPE_ASSOC_REQ   0x0000
#define IEEE80211_STYPE_ASSOC_RESP  0x0010
#define IEEE80211_STYPE_REASSOC_REQ 0x0020
#define IEEE80211_STYPE_REASSOC_RESP    0x0030
#define IEEE80211_STYPE_PROBE_REQ   0x0040
#define IEEE80211_STYPE_PROBE_RESP  0x0050
#define IEEE80211_STYPE_BEACON      0x0080
#define IEEE80211_STYPE_ATIM        0x0090
#define IEEE80211_STYPE_DISASSOC    0x00A0
#define IEEE80211_STYPE_AUTH        0x00B0
#define IEEE80211_STYPE_DEAUTH      0x00C0
#define IEEE80211_STYPE_ACTION      0x00D0

/* control */
#define IEEE80211_STYPE_CTL_EXT     0x0060
#define IEEE80211_STYPE_BACK_REQ    0x0080
#define IEEE80211_STYPE_BACK        0x0090
#define IEEE80211_STYPE_PSPOLL      0x00A0
#define IEEE80211_STYPE_RTS     0x00B0
#define IEEE80211_STYPE_CTS     0x00C0
#define IEEE80211_STYPE_ACK     0x00D0
#define IEEE80211_STYPE_CFEND       0x00E0
#define IEEE80211_STYPE_CFENDACK    0x00F0

/* data */
#define IEEE80211_STYPE_DATA            0x0000
#define IEEE80211_STYPE_DATA_CFACK      0x0010
#define IEEE80211_STYPE_DATA_CFPOLL     0x0020
#define IEEE80211_STYPE_DATA_CFACKPOLL      0x0030
#define IEEE80211_STYPE_NULLFUNC        0x0040
#define IEEE80211_STYPE_CFACK           0x0050
#define IEEE80211_STYPE_CFPOLL          0x0060
#define IEEE80211_STYPE_CFACKPOLL       0x0070
#define IEEE80211_STYPE_QOS_DATA        0x0080
#define IEEE80211_STYPE_QOS_DATA_CFACK      0x0090
#define IEEE80211_STYPE_QOS_DATA_CFPOLL     0x00A0
#define IEEE80211_STYPE_QOS_DATA_CFACKPOLL  0x00B0
#define IEEE80211_STYPE_QOS_NULLFUNC        0x00C0
#define IEEE80211_STYPE_QOS_CFACK       0x00D0
#define IEEE80211_STYPE_QOS_CFPOLL      0x00E0
#define IEEE80211_STYPE_QOS_CFACKPOLL       0x00F0

/* extension, added by 802.11ad */
#define IEEE80211_STYPE_DMG_BEACON      0x0000

/* control extension - for IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTL_EXT */
#define IEEE80211_CTL_EXT_POLL      0x2000
#define IEEE80211_CTL_EXT_SPR       0x3000
#define IEEE80211_CTL_EXT_GRANT 0x4000
#define IEEE80211_CTL_EXT_DMG_CTS   0x5000
#define IEEE80211_CTL_EXT_DMG_DTS   0x6000
#define IEEE80211_CTL_EXT_SSW       0x8000
#define IEEE80211_CTL_EXT_SSW_FBACK 0x9000
#define IEEE80211_CTL_EXT_SSW_ACK   0xa000

/* miscellaneous IEEE 802.11 constants */
#define IEEE80211_MAX_FRAG_THRESHOLD    2352
#define IEEE80211_MAX_RTS_THRESHOLD 2353
#define IEEE80211_MAX_AID       2007
#define IEEE80211_MAX_TIM_LEN       251
/* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
   6.2.1.1.2.

   802.11e clarifies the figure in section 7.1.2. The frame body is
   up to 2304 octets long (maximum MSDU size) plus any crypt overhead. */
#define IEEE80211_MAX_DATA_LEN      2304
/* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */
#define IEEE80211_MAX_FRAME_LEN     2352

#define IEEE80211_MAX_SSID_LEN      32

#define IEEE80211_MAX_MESH_ID_LEN   32

#define IEEE80211_QOS_CTL_LEN       2
/* 1d tag mask */
#define IEEE80211_QOS_CTL_TAG1D_MASK        0x0007
/* TID mask */
#define IEEE80211_QOS_CTL_TID_MASK      0x000f
/* EOSP */
#define IEEE80211_QOS_CTL_EOSP          0x0010
/* ACK policy */
#define IEEE80211_QOS_CTL_ACK_POLICY_NORMAL 0x0000
#define IEEE80211_QOS_CTL_ACK_POLICY_NOACK  0x0020
#define IEEE80211_QOS_CTL_ACK_POLICY_NO_EXPL    0x0040
#define IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK   0x0060
#define IEEE80211_QOS_CTL_ACK_POLICY_MASK   0x0060
/* A-MSDU 802.11n */
#define IEEE80211_QOS_CTL_A_MSDU_PRESENT    0x0080
/* Mesh Control 802.11s */
#define IEEE80211_QOS_CTL_MESH_CONTROL_PRESENT  0x0100

/* U-APSD queue for WMM IEs sent by AP */
#define IEEE80211_WMM_IE_AP_QOSINFO_UAPSD   (1<<7)
#define IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK  0x0f

/* U-APSD queues for WMM IEs sent by STA */
#define IEEE80211_WMM_IE_STA_QOSINFO_AC_VO  (1<<0)
#define IEEE80211_WMM_IE_STA_QOSINFO_AC_VI  (1<<1)
#define IEEE80211_WMM_IE_STA_QOSINFO_AC_BK  (1<<2)
#define IEEE80211_WMM_IE_STA_QOSINFO_AC_BE  (1<<3)
#define IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK    0x0f

/* U-APSD max SP length for WMM IEs sent by STA */
#define IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL 0x00
#define IEEE80211_WMM_IE_STA_QOSINFO_SP_2   0x01
#define IEEE80211_WMM_IE_STA_QOSINFO_SP_4   0x02
#define IEEE80211_WMM_IE_STA_QOSINFO_SP_6   0x03
#define IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK    0x03
#define IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT   5

#define IEEE80211_HT_CTL_LEN        4

struct ieee80211_hdr {
    __le16 frame_control;
    __le16 duration_id;
    u8 addr1[6];
    u8 addr2[6];
    u8 addr3[6];
    __le16 seq_ctrl;
    u8 addr4[6];
} __attribute__ ((packed));

struct ieee80211_hdr_3addr {
    __le16 frame_control;
    __le16 duration_id;
    u8 addr1[6];
    u8 addr2[6];
    u8 addr3[6];
    __le16 seq_ctrl;
} __attribute__ ((packed));

struct ieee80211_qos_hdr {
    __le16 frame_control;
    __le16 duration_id;
    u8 addr1[6];
    u8 addr2[6];
    u8 addr3[6];
    __le16 seq_ctrl;
    __le16 qos_ctrl;
} __attribute__ ((packed));

static inline int ieee80211_has_tods(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_TODS)) != 0;
}

static inline int ieee80211_has_fromds(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FROMDS)) != 0;
}

static inline int ieee80211_has_a4(__le16 fc)
{
    __le16 tmp = cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
    return (fc & tmp) == tmp;
}

static inline int ieee80211_has_morefrags(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)) != 0;
}

static inline int ieee80211_has_retry(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_RETRY)) != 0;
}

static inline int ieee80211_has_pm(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_PM)) != 0;
}

static inline int ieee80211_has_moredata(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) != 0;
}

static inline int ieee80211_has_protected(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_PROTECTED)) != 0;
}

static inline int ieee80211_has_order(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_ORDER)) != 0;
}

static inline int ieee80211_is_mgmt(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT);
}

static inline int ieee80211_is_ctl(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_CTL);
}

static inline int ieee80211_is_data(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_DATA);
}

static inline int ieee80211_is_data_qos(__le16 fc)
{
    /*
     * mask with QOS_DATA rather than IEEE80211_FCTL_STYPE as we just need
     * to check the one bit
     */
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_STYPE_QOS_DATA)) ==
           cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA);
}

static inline int ieee80211_is_data_present(__le16 fc)
{
    /*
     * mask with 0x40 and test that that bit is clear to only return true
     * for the data-containing substypes.
     */
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | 0x40)) ==
           cpu_to_le16(IEEE80211_FTYPE_DATA);
}

static inline int ieee80211_is_assoc_req(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ);
}

static inline int ieee80211_is_assoc_resp(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_RESP);
}

static inline int ieee80211_is_reassoc_req(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ);
}

static inline int ieee80211_is_reassoc_resp(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_RESP);
}

static inline int ieee80211_is_probe_req(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ);
}

static inline int ieee80211_is_probe_resp(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP);
}

static inline int ieee80211_is_beacon(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON);
}

static inline int ieee80211_is_atim(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ATIM);
}

static inline int ieee80211_is_disassoc(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DISASSOC);
}

static inline int ieee80211_is_auth(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
}

static inline int ieee80211_is_deauth(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH);
}

static inline int ieee80211_is_action(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION);
}

static inline int ieee80211_is_back_req(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ);
}

static inline int ieee80211_is_back(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK);
}

static inline int ieee80211_is_pspoll(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
}

static inline int ieee80211_is_rts(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
}

static inline int ieee80211_is_cts(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
}

static inline int ieee80211_is_ack(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK);
}

static inline int ieee80211_is_cfend(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFEND);
}

static inline int ieee80211_is_cfendack(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CFENDACK);
}

static inline int ieee80211_is_nullfunc(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC);
}

static inline int ieee80211_is_qos_nullfunc(__le16 fc)
{
    return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
           cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC);
}

static inline int ieee80211_is_first_frag(__le16 seq_ctrl)
{
    return (seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG)) == 0;
}

struct ieee80211s_hdr {
    u8 flags;
    u8 ttl;
    __le32 seqnum;
    u8 eaddr1[6];
    u8 eaddr2[6];
} __attribute__ ((packed));

/* Mesh flags */
#define MESH_FLAGS_AE_A4    0x1
#define MESH_FLAGS_AE_A5_A6 0x2
#define MESH_FLAGS_AE       0x3
#define MESH_FLAGS_PS_DEEP  0x4

enum ieee80211_preq_flags {
    IEEE80211_PREQ_PROACTIVE_PREP_FLAG  = 1<<2,
};

enum ieee80211_preq_target_flags {
    IEEE80211_PREQ_TO_FLAG  = 1<<0,
    IEEE80211_PREQ_USN_FLAG = 1<<2,
};

struct ieee80211_quiet_ie {
    u8 count;
    u8 period;
    __le16 duration;
    __le16 offset;
} __attribute__ ((packed));

struct ieee80211_msrment_ie {
    u8 token;
    u8 mode;
    u8 type;
    u8 request[0];
} __attribute__ ((packed));

struct ieee80211_channel_sw_ie {
    u8 mode;
    u8 new_ch_num;
    u8 count;
} __attribute__ ((packed));

struct ieee80211_tim_ie {
    u8 dtim_count;
    u8 dtim_period;
    u8 bitmap_ctrl;
    /* variable size: 1 - 251 bytes */
    u8 virtual_map[1];
} __attribute__ ((packed));

struct ieee80211_meshconf_ie {
    u8 meshconf_psel;
    u8 meshconf_pmetric;
    u8 meshconf_congest;
    u8 meshconf_synch;
    u8 meshconf_auth;
    u8 meshconf_form;
    u8 meshconf_cap;
} __attribute__ ((packed));

struct ieee80211_rann_ie {
    u8 rann_flags;
    u8 rann_hopcount;
    u8 rann_ttl;
    u8 rann_addr[6];
    __le32 rann_seq;
    __le32 rann_interval;
    __le32 rann_metric;
} __attribute__ ((packed));

enum ieee80211_rann_flags {
    RANN_FLAG_IS_GATE = 1 << 0,
};

#define WLAN_SA_QUERY_TR_ID_LEN 2

struct ieee80211_mgmt {
    __le16 frame_control;
    __le16 duration;
    u8 da[6];
    u8 sa[6];
    u8 bssid[6];
    __le16 seq_ctrl;
    union {
        struct {
            __le16 auth_alg;
            __le16 auth_transaction;
            __le16 status_code;
            /* possibly followed by Challenge text */
            u8 variable[0];
        } __attribute__ ((packed)) auth;
        struct {
            __le16 reason_code;
        } __attribute__ ((packed)) deauth;
        struct {
            __le16 capab_info;
            __le16 listen_interval;
            /* followed by SSID and Supported rates */
            u8 variable[0];
        } __attribute__ ((packed)) assoc_req;
        struct {
            __le16 capab_info;
            __le16 status_code;
            __le16 aid;
            /* followed by Supported rates */
            u8 variable[0];
        } __attribute__ ((packed)) assoc_resp, reassoc_resp;
        struct {
            __le16 capab_info;
            __le16 listen_interval;
            u8 current_ap[6];
            /* followed by SSID and Supported rates */
            u8 variable[0];
        } __attribute__ ((packed)) reassoc_req;
        struct {
            __le16 reason_code;
        } __attribute__ ((packed)) disassoc;
        struct {
            __le64 timestamp;
            __le16 beacon_int;
            __le16 capab_info;
            /* followed by some of SSID, Supported rates,
             * FH Params, DS Params, CF Params, IBSS Params, TIM */
            u8 variable[0];
        } __attribute__ ((packed)) beacon;
        struct {
            /* only variable items: SSID, Supported rates */
            u8 variable[0];
        } __attribute__ ((packed)) probe_req;
        struct {
            __le64 timestamp;
            __le16 beacon_int;
            __le16 capab_info;
            /* followed by some of SSID, Supported rates,
             * FH Params, DS Params, CF Params, IBSS Params */
            u8 variable[0];
        } __attribute__ ((packed)) probe_resp;
        struct {
            u8 category;
            union {
                struct {
                    u8 action_code;
                    u8 dialog_token;
                    u8 status_code;
                    u8 variable[0];
                } __attribute__ ((packed)) wme_action;
                struct{
                    u8 action_code;
                    u8 element_id;
                    u8 length;
                    struct ieee80211_channel_sw_ie sw_elem;
                } __attribute__((packed)) chan_switch;
                struct{
                    u8 action_code;
                    u8 dialog_token;
                    u8 element_id;
                    u8 length;
                    struct ieee80211_msrment_ie msr_elem;
                } __attribute__((packed)) measurement;
                struct{
                    u8 action_code;
                    u8 dialog_token;
                    __le16 capab;
                    __le16 timeout;
                    __le16 start_seq_num;
                } __attribute__((packed)) addba_req;
                struct{
                    u8 action_code;
                    u8 dialog_token;
                    __le16 status;
                    __le16 capab;
                    __le16 timeout;
                } __attribute__((packed)) addba_resp;
                struct{
                    u8 action_code;
                    __le16 params;
                    __le16 reason_code;
                } __attribute__((packed)) delba;
                struct {
                    u8 action_code;
                    u8 variable[0];
                } __attribute__((packed)) self_prot;
                struct{
                    u8 action_code;
                    u8 variable[0];
                } __attribute__((packed)) mesh_action;
                struct {
                    u8 action;
                    u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
                } __attribute__ ((packed)) sa_query;
                struct {
                    u8 action;
                    u8 smps_control;
                } __attribute__ ((packed)) ht_smps;
                struct {
                    u8 action_code;
                    u8 dialog_token;
                    __le16 capability;
                    u8 variable[0];
                } __packed tdls_discover_resp;
            } u;
        } __attribute__ ((packed)) action;
    } u;
} __attribute__ ((packed));

/* Supported Rates value encodings in 802.11n-2009 7.3.2.2 */
#define BSS_MEMBERSHIP_SELECTOR_HT_PHY  127

/* mgmt header + 1 byte category code */
#define IEEE80211_MIN_ACTION_SIZE offsetof(struct ieee80211_mgmt, u.action.u)


/* Management MIC information element (IEEE 802.11w) */
struct ieee80211_mmie {
    u8 element_id;
    u8 length;
    __le16 key_id;
    u8 sequence_number[6];
    u8 mic[8];
} __attribute__ ((packed));

struct ieee80211_vendor_ie {
    u8 element_id;
    u8 len;
    u8 oui[3];
    u8 oui_type;
} __packed;

/* Control frames */
struct ieee80211_rts {
    __le16 frame_control;
    __le16 duration;
    u8 ra[6];
    u8 ta[6];
} __attribute__ ((packed));

struct ieee80211_cts {
    __le16 frame_control;
    __le16 duration;
    u8 ra[6];
} __attribute__ ((packed));

struct ieee80211_pspoll {
    __le16 frame_control;
    __le16 aid;
    u8 bssid[6];
    u8 ta[6];
} __attribute__ ((packed));

/* TDLS */

/* Link-id information element */
struct ieee80211_tdls_lnkie {
    u8 ie_type; /* Link Identifier IE */
    u8 ie_len;
    u8 bssid[6];
    u8 init_sta[6];
    u8 resp_sta[6];
} __packed;

struct ieee80211_tdls_data {
    u8 da[6];
    u8 sa[6];
    __be16 ether_type;
    u8 payload_type;
    u8 category;
    u8 action_code;
    union {
        struct {
            u8 dialog_token;
            __le16 capability;
            u8 variable[0];
        } __packed setup_req;
        struct {
            __le16 status_code;
            u8 dialog_token;
            __le16 capability;
            u8 variable[0];
        } __packed setup_resp;
        struct {
            __le16 status_code;
            u8 dialog_token;
            u8 variable[0];
        } __packed setup_cfm;
        struct {
            __le16 reason_code;
            u8 variable[0];
        } __packed teardown;
        struct {
            u8 dialog_token;
            u8 variable[0];
        } __packed discover_req;
    } u;
} __packed;

struct ieee80211_bar {
    __le16 frame_control;
    __le16 duration;
    __u8 ra[6];
    __u8 ta[6];
    __le16 control;
    __le16 start_seq_num;
} __attribute__((packed));

/* 802.11 BAR control masks */
#define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL    0x0000
#define IEEE80211_BAR_CTRL_MULTI_TID        0x0002
#define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA 0x0004
#define IEEE80211_BAR_CTRL_TID_INFO_MASK    0xf000
#define IEEE80211_BAR_CTRL_TID_INFO_SHIFT   12

#define IEEE80211_HT_MCS_MASK_LEN       10

struct ieee80211_mcs_info {
    u8 rx_mask[IEEE80211_HT_MCS_MASK_LEN];
    __le16 rx_highest;
    u8 tx_params;
    u8 reserved[3];
} __attribute__((packed));

/* 802.11n HT capability MSC set */
#define IEEE80211_HT_MCS_RX_HIGHEST_MASK    0x3ff
#define IEEE80211_HT_MCS_TX_DEFINED     0x01
#define IEEE80211_HT_MCS_TX_RX_DIFF     0x02
/* value 0 == 1 stream etc */
#define IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK    0x0C
#define IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT   2
#define     IEEE80211_HT_MCS_TX_MAX_STREAMS 4
#define IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION  0x10

/*
 * 802.11n D5.0 20.3.5 / 20.6 says:
 * - indices 0 to 7 and 32 are single spatial stream
 * - 8 to 31 are multiple spatial streams using equal modulation
 *   [8..15 for two streams, 16..23 for three and 24..31 for four]
 * - remainder are multiple spatial streams using unequal modulation
 */
#define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START 33
#define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE \
    (IEEE80211_HT_MCS_UNEQUAL_MODULATION_START / 8)

struct ieee80211_ht_cap {
    __le16 cap_info;
    u8 ampdu_params_info;

    /* 16 bytes MCS information */
    struct ieee80211_mcs_info mcs;

    __le16 extended_ht_cap_info;
    __le32 tx_BF_cap_info;
    u8 antenna_selection_info;
} __attribute__ ((packed));

/* 802.11n HT capabilities masks (for cap_info) */
#define IEEE80211_HT_CAP_LDPC_CODING        0x0001
#define IEEE80211_HT_CAP_SUP_WIDTH_20_40    0x0002
#define IEEE80211_HT_CAP_SM_PS          0x000C
#define     IEEE80211_HT_CAP_SM_PS_SHIFT    2
#define IEEE80211_HT_CAP_GRN_FLD        0x0010
#define IEEE80211_HT_CAP_SGI_20         0x0020
#define IEEE80211_HT_CAP_SGI_40         0x0040
#define IEEE80211_HT_CAP_TX_STBC        0x0080
#define IEEE80211_HT_CAP_RX_STBC        0x0300
#define     IEEE80211_HT_CAP_RX_STBC_SHIFT  8
#define IEEE80211_HT_CAP_DELAY_BA       0x0400
#define IEEE80211_HT_CAP_MAX_AMSDU      0x0800
#define IEEE80211_HT_CAP_DSSSCCK40      0x1000
#define IEEE80211_HT_CAP_RESERVED       0x2000
#define IEEE80211_HT_CAP_40MHZ_INTOLERANT   0x4000
#define IEEE80211_HT_CAP_LSIG_TXOP_PROT     0x8000

/* 802.11n HT extended capabilities masks (for extended_ht_cap_info) */
#define IEEE80211_HT_EXT_CAP_PCO        0x0001
#define IEEE80211_HT_EXT_CAP_PCO_TIME       0x0006
#define     IEEE80211_HT_EXT_CAP_PCO_TIME_SHIFT 1
#define IEEE80211_HT_EXT_CAP_MCS_FB     0x0300
#define     IEEE80211_HT_EXT_CAP_MCS_FB_SHIFT   8
#define IEEE80211_HT_EXT_CAP_HTC_SUP        0x0400
#define IEEE80211_HT_EXT_CAP_RD_RESPONDER   0x0800

/* 802.11n HT capability AMPDU settings (for ampdu_params_info) */
#define IEEE80211_HT_AMPDU_PARM_FACTOR      0x03
#define IEEE80211_HT_AMPDU_PARM_DENSITY     0x1C
#define     IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT   2

/*
 * Maximum length of AMPDU that the STA can receive.
 * Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
 */
enum ieee80211_max_ampdu_length_exp {
    IEEE80211_HT_MAX_AMPDU_8K = 0,
    IEEE80211_HT_MAX_AMPDU_16K = 1,
    IEEE80211_HT_MAX_AMPDU_32K = 2,
    IEEE80211_HT_MAX_AMPDU_64K = 3
};

#define IEEE80211_HT_MAX_AMPDU_FACTOR 13

/* Minimum MPDU start spacing */
enum ieee80211_min_mpdu_spacing {
    IEEE80211_HT_MPDU_DENSITY_NONE = 0, /* No restriction */
    IEEE80211_HT_MPDU_DENSITY_0_25 = 1, /* 1/4 usec */
    IEEE80211_HT_MPDU_DENSITY_0_5 = 2,  /* 1/2 usec */
    IEEE80211_HT_MPDU_DENSITY_1 = 3,    /* 1 usec */
    IEEE80211_HT_MPDU_DENSITY_2 = 4,    /* 2 usec */
    IEEE80211_HT_MPDU_DENSITY_4 = 5,    /* 4 usec */
    IEEE80211_HT_MPDU_DENSITY_8 = 6,    /* 8 usec */
    IEEE80211_HT_MPDU_DENSITY_16 = 7    /* 16 usec */
};

struct ieee80211_ht_operation {
    u8 primary_chan;
    u8 ht_param;
    __le16 operation_mode;
    __le16 stbc_param;
    u8 basic_set[16];
} __attribute__ ((packed));

/* for ht_param */
#define IEEE80211_HT_PARAM_CHA_SEC_OFFSET       0x03
#define     IEEE80211_HT_PARAM_CHA_SEC_NONE     0x00
#define     IEEE80211_HT_PARAM_CHA_SEC_ABOVE    0x01
#define     IEEE80211_HT_PARAM_CHA_SEC_BELOW    0x03
#define IEEE80211_HT_PARAM_CHAN_WIDTH_ANY       0x04
#define IEEE80211_HT_PARAM_RIFS_MODE            0x08

/* for operation_mode */
#define IEEE80211_HT_OP_MODE_PROTECTION         0x0003
#define     IEEE80211_HT_OP_MODE_PROTECTION_NONE        0
#define     IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER   1
#define     IEEE80211_HT_OP_MODE_PROTECTION_20MHZ       2
#define     IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED 3
#define IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT       0x0004
#define IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT       0x0010

/* for stbc_param */
#define IEEE80211_HT_STBC_PARAM_DUAL_BEACON     0x0040
#define IEEE80211_HT_STBC_PARAM_DUAL_CTS_PROT       0x0080
#define IEEE80211_HT_STBC_PARAM_STBC_BEACON     0x0100
#define IEEE80211_HT_STBC_PARAM_LSIG_TXOP_FULLPROT  0x0200
#define IEEE80211_HT_STBC_PARAM_PCO_ACTIVE      0x0400
#define IEEE80211_HT_STBC_PARAM_PCO_PHASE       0x0800


/* block-ack parameters */
#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFC0
#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800

/*
 * A-PMDU buffer sizes
 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2)
 */
#define IEEE80211_MIN_AMPDU_BUF 0x8
#define IEEE80211_MAX_AMPDU_BUF 0x40


/* Spatial Multiplexing Power Save Modes (for capability) */
#define WLAN_HT_CAP_SM_PS_STATIC    0
#define WLAN_HT_CAP_SM_PS_DYNAMIC   1
#define WLAN_HT_CAP_SM_PS_INVALID   2
#define WLAN_HT_CAP_SM_PS_DISABLED  3

/* for SM power control field lower two bits */
#define WLAN_HT_SMPS_CONTROL_DISABLED   0
#define WLAN_HT_SMPS_CONTROL_STATIC 1
#define WLAN_HT_SMPS_CONTROL_DYNAMIC    3

#define VHT_MCS_SUPPORTED_SET_SIZE      8

struct ieee80211_vht_capabilities {
    __le32 vht_capabilities_info;
    u8 vht_supported_mcs_set[VHT_MCS_SUPPORTED_SET_SIZE];
} __packed;

struct ieee80211_vht_operation {
    u8 vht_op_info_chwidth;
    u8 vht_op_info_chan_center_freq_seg1_idx;
    u8 vht_op_info_chan_center_freq_seg2_idx;
    __le16 vht_basic_mcs_set;
} __packed;

struct ieee80211_vht_mcs_info {
    __le16 rx_mcs_map;
    __le16 rx_highest;
    __le16 tx_mcs_map;
    __le16 tx_highest;
} __packed;

#define IEEE80211_VHT_MCS_ZERO_TO_SEVEN_SUPPORT 0
#define IEEE80211_VHT_MCS_ZERO_TO_EIGHT_SUPPORT 1
#define IEEE80211_VHT_MCS_ZERO_TO_NINE_SUPPORT  2
#define IEEE80211_VHT_MCS_NOT_SUPPORTED 3

/* 802.11ac VHT Capabilities */
#define IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895                0x00000000
#define IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991                0x00000001
#define IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454               0x00000002
#define IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ              0x00000004
#define IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ     0x00000008
#define IEEE80211_VHT_CAP_RXLDPC                              0x00000010
#define IEEE80211_VHT_CAP_SHORT_GI_80                         0x00000020
#define IEEE80211_VHT_CAP_SHORT_GI_160                        0x00000040
#define IEEE80211_VHT_CAP_TXSTBC                              0x00000080
#define IEEE80211_VHT_CAP_RXSTBC_1                            0x00000100
#define IEEE80211_VHT_CAP_RXSTBC_2                            0x00000200
#define IEEE80211_VHT_CAP_RXSTBC_3                            0x00000300
#define IEEE80211_VHT_CAP_RXSTBC_4                            0x00000400
#define IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE               0x00000800
#define IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE               0x00001000
#define IEEE80211_VHT_CAP_BEAMFORMER_ANTENNAS_MAX             0x00006000
#define IEEE80211_VHT_CAP_SOUNDING_DIMENTION_MAX              0x00030000
#define IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE               0x00080000
#define IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE               0x00100000
#define IEEE80211_VHT_CAP_VHT_TXOP_PS                         0x00200000
#define IEEE80211_VHT_CAP_HTC_VHT                             0x00400000
#define IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT          0x00800000
#define IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB   0x08000000
#define IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB     0x0c000000
#define IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN                  0x10000000
#define IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN                  0x20000000

/* Authentication algorithms */
#define WLAN_AUTH_OPEN 0
#define WLAN_AUTH_SHARED_KEY 1
#define WLAN_AUTH_FT 2
#define WLAN_AUTH_SAE 3
#define WLAN_AUTH_LEAP 128

#define WLAN_AUTH_CHALLENGE_LEN 128

#define WLAN_CAPABILITY_ESS     (1<<0)
#define WLAN_CAPABILITY_IBSS        (1<<1)

/*
 * A mesh STA sets the ESS and IBSS capability bits to zero.
 * however, this holds true for p2p probe responses (in the p2p_find
 * phase) as well.
 */
#define WLAN_CAPABILITY_IS_STA_BSS(cap) \
    (!((cap) & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)))

#define WLAN_CAPABILITY_CF_POLLABLE (1<<2)
#define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
#define WLAN_CAPABILITY_PRIVACY     (1<<4)
#define WLAN_CAPABILITY_SHORT_PREAMBLE  (1<<5)
#define WLAN_CAPABILITY_PBCC        (1<<6)
#define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)

/* 802.11h */
#define WLAN_CAPABILITY_SPECTRUM_MGMT   (1<<8)
#define WLAN_CAPABILITY_QOS     (1<<9)
#define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
#define WLAN_CAPABILITY_DSSS_OFDM   (1<<13)

/* DMG (60gHz) 802.11ad */
/* type - bits 0..1 */
#define WLAN_CAPABILITY_DMG_TYPE_IBSS       (1<<0) /* Tx by: STA */
#define WLAN_CAPABILITY_DMG_TYPE_PBSS       (2<<0) /* Tx by: PCP */
#define WLAN_CAPABILITY_DMG_TYPE_AP     (3<<0) /* Tx by: AP */

#define WLAN_CAPABILITY_DMG_CBAP_ONLY       (1<<2)
#define WLAN_CAPABILITY_DMG_CBAP_SOURCE (1<<3)
#define WLAN_CAPABILITY_DMG_PRIVACY     (1<<4)
#define WLAN_CAPABILITY_DMG_ECPAC       (1<<5)

#define WLAN_CAPABILITY_DMG_SPECTRUM_MGMT   (1<<8)
#define WLAN_CAPABILITY_DMG_RADIO_MEASURE   (1<<12)

/* measurement */
#define IEEE80211_SPCT_MSR_RPRT_MODE_LATE   (1<<0)
#define IEEE80211_SPCT_MSR_RPRT_MODE_INCAPABLE  (1<<1)
#define IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED    (1<<2)

#define IEEE80211_SPCT_MSR_RPRT_TYPE_BASIC  0
#define IEEE80211_SPCT_MSR_RPRT_TYPE_CCA    1
#define IEEE80211_SPCT_MSR_RPRT_TYPE_RPI    2

/* 802.11g ERP information element */
#define WLAN_ERP_NON_ERP_PRESENT (1<<0)
#define WLAN_ERP_USE_PROTECTION (1<<1)
#define WLAN_ERP_BARKER_PREAMBLE (1<<2)

/* WLAN_ERP_BARKER_PREAMBLE values */
enum {
    WLAN_ERP_PREAMBLE_SHORT = 0,
    WLAN_ERP_PREAMBLE_LONG = 1,
};

/* Band ID, 802.11ad #8.4.1.45 */
enum {
    IEEE80211_BANDID_TV_WS = 0, /* TV white spaces */
    IEEE80211_BANDID_SUB1  = 1, /* Sub-1 GHz (excluding TV white spaces) */
    IEEE80211_BANDID_2G    = 2, /* 2.4 GHz */
    IEEE80211_BANDID_3G    = 3, /* 3.6 GHz */
    IEEE80211_BANDID_5G    = 4, /* 4.9 and 5 GHz */
    IEEE80211_BANDID_60G   = 5, /* 60 GHz */
};

/* Status codes */
enum ieee80211_statuscode {
    WLAN_STATUS_SUCCESS = 0,
    WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
    WLAN_STATUS_CAPS_UNSUPPORTED = 10,
    WLAN_STATUS_REASSOC_NO_ASSOC = 11,
    WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
    WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
    WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
    WLAN_STATUS_CHALLENGE_FAIL = 15,
    WLAN_STATUS_AUTH_TIMEOUT = 16,
    WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
    WLAN_STATUS_ASSOC_DENIED_RATES = 18,
    /* 802.11b */
    WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
    WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
    WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
    /* 802.11h */
    WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
    WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
    WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
    /* 802.11g */
    WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
    WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
    /* 802.11w */
    WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY = 30,
    WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION = 31,
    /* 802.11i */
    WLAN_STATUS_INVALID_IE = 40,
    WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
    WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
    WLAN_STATUS_INVALID_AKMP = 43,
    WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
    WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
    WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
    /* 802.11e */
    WLAN_STATUS_UNSPECIFIED_QOS = 32,
    WLAN_STATUS_ASSOC_DENIED_NOBANDWIDTH = 33,
    WLAN_STATUS_ASSOC_DENIED_LOWACK = 34,
    WLAN_STATUS_ASSOC_DENIED_UNSUPP_QOS = 35,
    WLAN_STATUS_REQUEST_DECLINED = 37,
    WLAN_STATUS_INVALID_QOS_PARAM = 38,
    WLAN_STATUS_CHANGE_TSPEC = 39,
    WLAN_STATUS_WAIT_TS_DELAY = 47,
    WLAN_STATUS_NO_DIRECT_LINK = 48,
    WLAN_STATUS_STA_NOT_PRESENT = 49,
    WLAN_STATUS_STA_NOT_QSTA = 50,
    /* 802.11s */
    WLAN_STATUS_ANTI_CLOG_REQUIRED = 76,
    WLAN_STATUS_FCG_NOT_SUPP = 78,
    WLAN_STATUS_STA_NO_TBTT = 78,
    /* 802.11ad */
    WLAN_STATUS_REJECTED_WITH_SUGGESTED_CHANGES = 39,
    WLAN_STATUS_REJECTED_FOR_DELAY_PERIOD = 47,
    WLAN_STATUS_REJECT_WITH_SCHEDULE = 83,
    WLAN_STATUS_PENDING_ADMITTING_FST_SESSION = 86,
    WLAN_STATUS_PERFORMING_FST_NOW = 87,
    WLAN_STATUS_PENDING_GAP_IN_BA_WINDOW = 88,
    WLAN_STATUS_REJECT_U_PID_SETTING = 89,
    WLAN_STATUS_REJECT_DSE_BAND = 96,
    WLAN_STATUS_DENIED_WITH_SUGGESTED_BAND_AND_CHANNEL = 99,
    WLAN_STATUS_DENIED_DUE_TO_SPECTRUM_MANAGEMENT = 103,
};


/* Reason codes */
enum ieee80211_reasoncode {
    WLAN_REASON_UNSPECIFIED = 1,
    WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
    WLAN_REASON_DEAUTH_LEAVING = 3,
    WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
    WLAN_REASON_DISASSOC_AP_BUSY = 5,
    WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
    WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
    WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
    WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
    /* 802.11h */
    WLAN_REASON_DISASSOC_BAD_POWER = 10,
    WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
    /* 802.11i */
    WLAN_REASON_INVALID_IE = 13,
    WLAN_REASON_MIC_FAILURE = 14,
    WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
    WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
    WLAN_REASON_IE_DIFFERENT = 17,
    WLAN_REASON_INVALID_GROUP_CIPHER = 18,
    WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
    WLAN_REASON_INVALID_AKMP = 20,
    WLAN_REASON_UNSUPP_RSN_VERSION = 21,
    WLAN_REASON_INVALID_RSN_IE_CAP = 22,
    WLAN_REASON_IEEE8021X_FAILED = 23,
    WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
    /* 802.11e */
    WLAN_REASON_DISASSOC_UNSPECIFIED_QOS = 32,
    WLAN_REASON_DISASSOC_QAP_NO_BANDWIDTH = 33,
    WLAN_REASON_DISASSOC_LOW_ACK = 34,
    WLAN_REASON_DISASSOC_QAP_EXCEED_TXOP = 35,
    WLAN_REASON_QSTA_LEAVE_QBSS = 36,
    WLAN_REASON_QSTA_NOT_USE = 37,
    WLAN_REASON_QSTA_REQUIRE_SETUP = 38,
    WLAN_REASON_QSTA_TIMEOUT = 39,
    WLAN_REASON_QSTA_CIPHER_NOT_SUPP = 45,
    /* 802.11s */
    WLAN_REASON_MESH_PEER_CANCELED = 52,
    WLAN_REASON_MESH_MAX_PEERS = 53,
    WLAN_REASON_MESH_CONFIG = 54,
    WLAN_REASON_MESH_CLOSE = 55,
    WLAN_REASON_MESH_MAX_RETRIES = 56,
    WLAN_REASON_MESH_CONFIRM_TIMEOUT = 57,
    WLAN_REASON_MESH_INVALID_GTK = 58,
    WLAN_REASON_MESH_INCONSISTENT_PARAM = 59,
    WLAN_REASON_MESH_INVALID_SECURITY = 60,
    WLAN_REASON_MESH_PATH_ERROR = 61,
    WLAN_REASON_MESH_PATH_NOFORWARD = 62,
    WLAN_REASON_MESH_PATH_DEST_UNREACHABLE = 63,
    WLAN_REASON_MAC_EXISTS_IN_MBSS = 64,
    WLAN_REASON_MESH_CHAN_REGULATORY = 65,
    WLAN_REASON_MESH_CHAN = 66,
};


/* Information Element IDs */
enum ieee80211_eid {
    WLAN_EID_SSID = 0,
    WLAN_EID_SUPP_RATES = 1,
    WLAN_EID_FH_PARAMS = 2,
    WLAN_EID_DS_PARAMS = 3,
    WLAN_EID_CF_PARAMS = 4,
    WLAN_EID_TIM = 5,
    WLAN_EID_IBSS_PARAMS = 6,
    WLAN_EID_CHALLENGE = 16,

    WLAN_EID_COUNTRY = 7,
    WLAN_EID_HP_PARAMS = 8,
    WLAN_EID_HP_TABLE = 9,
    WLAN_EID_REQUEST = 10,

    WLAN_EID_QBSS_LOAD = 11,
    WLAN_EID_EDCA_PARAM_SET = 12,
    WLAN_EID_TSPEC = 13,
    WLAN_EID_TCLAS = 14,
    WLAN_EID_SCHEDULE = 15,
    WLAN_EID_TS_DELAY = 43,
    WLAN_EID_TCLAS_PROCESSING = 44,
    WLAN_EID_QOS_CAPA = 46,
    /* 802.11z */
    WLAN_EID_LINK_ID = 101,
    /* 802.11s */
    WLAN_EID_MESH_CONFIG = 113,
    WLAN_EID_MESH_ID = 114,
    WLAN_EID_LINK_METRIC_REPORT = 115,
    WLAN_EID_CONGESTION_NOTIFICATION = 116,
    WLAN_EID_PEER_MGMT = 117,
    WLAN_EID_CHAN_SWITCH_PARAM = 118,
    WLAN_EID_MESH_AWAKE_WINDOW = 119,
    WLAN_EID_BEACON_TIMING = 120,
    WLAN_EID_MCCAOP_SETUP_REQ = 121,
    WLAN_EID_MCCAOP_SETUP_RESP = 122,
    WLAN_EID_MCCAOP_ADVERT = 123,
    WLAN_EID_MCCAOP_TEARDOWN = 124,
    WLAN_EID_GANN = 125,
    WLAN_EID_RANN = 126,
    WLAN_EID_PREQ = 130,
    WLAN_EID_PREP = 131,
    WLAN_EID_PERR = 132,
    WLAN_EID_PXU = 137,
    WLAN_EID_PXUC = 138,
    WLAN_EID_AUTH_MESH_PEER_EXCH = 139,
    WLAN_EID_MIC = 140,

    WLAN_EID_PWR_CONSTRAINT = 32,
    WLAN_EID_PWR_CAPABILITY = 33,
    WLAN_EID_TPC_REQUEST = 34,
    WLAN_EID_TPC_REPORT = 35,
    WLAN_EID_SUPPORTED_CHANNELS = 36,
    WLAN_EID_CHANNEL_SWITCH = 37,
    WLAN_EID_MEASURE_REQUEST = 38,
    WLAN_EID_MEASURE_REPORT = 39,
    WLAN_EID_QUIET = 40,
    WLAN_EID_IBSS_DFS = 41,

    WLAN_EID_ERP_INFO = 42,
    WLAN_EID_EXT_SUPP_RATES = 50,

    WLAN_EID_HT_CAPABILITY = 45,
    WLAN_EID_HT_OPERATION = 61,

    WLAN_EID_RSN = 48,
    WLAN_EID_MMIE = 76,
    WLAN_EID_WPA = 221,
    WLAN_EID_GENERIC = 221,
    WLAN_EID_VENDOR_SPECIFIC = 221,
    WLAN_EID_QOS_PARAMETER = 222,

    WLAN_EID_AP_CHAN_REPORT = 51,
    WLAN_EID_NEIGHBOR_REPORT = 52,
    WLAN_EID_RCPI = 53,
    WLAN_EID_BSS_AVG_ACCESS_DELAY = 63,
    WLAN_EID_ANTENNA_INFO = 64,
    WLAN_EID_RSNI = 65,
    WLAN_EID_MEASUREMENT_PILOT_TX_INFO = 66,
    WLAN_EID_BSS_AVAILABLE_CAPACITY = 67,
    WLAN_EID_BSS_AC_ACCESS_DELAY = 68,
    WLAN_EID_RRM_ENABLED_CAPABILITIES = 70,
    WLAN_EID_MULTIPLE_BSSID = 71,
    WLAN_EID_BSS_COEX_2040 = 72,
    WLAN_EID_OVERLAP_BSS_SCAN_PARAM = 74,
    WLAN_EID_EXT_CAPABILITY = 127,

    WLAN_EID_MOBILITY_DOMAIN = 54,
    WLAN_EID_FAST_BSS_TRANSITION = 55,
    WLAN_EID_TIMEOUT_INTERVAL = 56,
    WLAN_EID_RIC_DATA = 57,
    WLAN_EID_RIC_DESCRIPTOR = 75,

    WLAN_EID_DSE_REGISTERED_LOCATION = 58,
    WLAN_EID_SUPPORTED_REGULATORY_CLASSES = 59,
    WLAN_EID_EXT_CHANSWITCH_ANN = 60,

    WLAN_EID_VHT_CAPABILITY = 191,
    WLAN_EID_VHT_OPERATION = 192,

    /* 802.11ad */
    WLAN_EID_NON_TX_BSSID_CAP =  83,
    WLAN_EID_WAKEUP_SCHEDULE = 143,
    WLAN_EID_EXT_SCHEDULE = 144,
    WLAN_EID_STA_AVAILABILITY = 145,
    WLAN_EID_DMG_TSPEC = 146,
    WLAN_EID_DMG_AT = 147,
    WLAN_EID_DMG_CAP = 148,
    WLAN_EID_DMG_OPERATION = 151,
    WLAN_EID_DMG_BSS_PARAM_CHANGE = 152,
    WLAN_EID_DMG_BEAM_REFINEMENT = 153,
    WLAN_EID_CHANNEL_MEASURE_FEEDBACK = 154,
    WLAN_EID_AWAKE_WINDOW = 157,
    WLAN_EID_MULTI_BAND = 158,
    WLAN_EID_ADDBA_EXT = 159,
    WLAN_EID_NEXT_PCP_LIST = 160,
    WLAN_EID_PCP_HANDOVER = 161,
    WLAN_EID_DMG_LINK_MARGIN = 162,
    WLAN_EID_SWITCHING_STREAM = 163,
    WLAN_EID_SESSION_TRANSITION = 164,
    WLAN_EID_DYN_TONE_PAIRING_REPORT = 165,
    WLAN_EID_CLUSTER_REPORT = 166,
    WLAN_EID_RELAY_CAP = 167,
    WLAN_EID_RELAY_XFER_PARAM_SET = 168,
    WLAN_EID_BEAM_LINK_MAINT = 169,
    WLAN_EID_MULTIPLE_MAC_ADDR = 170,
    WLAN_EID_U_PID = 171,
    WLAN_EID_DMG_LINK_ADAPT_ACK = 172,
    WLAN_EID_QUIET_PERIOD_REQ = 175,
    WLAN_EID_QUIET_PERIOD_RESP = 177,
    WLAN_EID_EPAC_POLICY = 182,
    WLAN_EID_CLISTER_TIME_OFF = 183,
    WLAN_EID_ANTENNA_SECTOR_ID_PATTERN = 190,
};

/* Action category code */
enum ieee80211_category {
    WLAN_CATEGORY_SPECTRUM_MGMT = 0,
    WLAN_CATEGORY_QOS = 1,
    WLAN_CATEGORY_DLS = 2,
    WLAN_CATEGORY_BACK = 3,
    WLAN_CATEGORY_PUBLIC = 4,
    WLAN_CATEGORY_HT = 7,
    WLAN_CATEGORY_SA_QUERY = 8,
    WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION = 9,
    WLAN_CATEGORY_TDLS = 12,
    WLAN_CATEGORY_MESH_ACTION = 13,
    WLAN_CATEGORY_MULTIHOP_ACTION = 14,
    WLAN_CATEGORY_SELF_PROTECTED = 15,
    WLAN_CATEGORY_DMG = 16,
    WLAN_CATEGORY_WMM = 17,
    WLAN_CATEGORY_FST = 18,
    WLAN_CATEGORY_UNPROT_DMG = 20,
    WLAN_CATEGORY_VENDOR_SPECIFIC_PROTECTED = 126,
    WLAN_CATEGORY_VENDOR_SPECIFIC = 127,
};

/* SPECTRUM_MGMT action code */
enum ieee80211_spectrum_mgmt_actioncode {
    WLAN_ACTION_SPCT_MSR_REQ = 0,
    WLAN_ACTION_SPCT_MSR_RPRT = 1,
    WLAN_ACTION_SPCT_TPC_REQ = 2,
    WLAN_ACTION_SPCT_TPC_RPRT = 3,
    WLAN_ACTION_SPCT_CHL_SWITCH = 4,
};

/* HT action codes */
enum ieee80211_ht_actioncode {
    WLAN_HT_ACTION_NOTIFY_CHANWIDTH = 0,
    WLAN_HT_ACTION_SMPS = 1,
    WLAN_HT_ACTION_PSMP = 2,
    WLAN_HT_ACTION_PCO_PHASE = 3,
    WLAN_HT_ACTION_CSI = 4,
    WLAN_HT_ACTION_NONCOMPRESSED_BF = 5,
    WLAN_HT_ACTION_COMPRESSED_BF = 6,
    WLAN_HT_ACTION_ASEL_IDX_FEEDBACK = 7,
};

/* Self Protected Action codes */
enum ieee80211_self_protected_actioncode {
    WLAN_SP_RESERVED = 0,
    WLAN_SP_MESH_PEERING_OPEN = 1,
    WLAN_SP_MESH_PEERING_CONFIRM = 2,
    WLAN_SP_MESH_PEERING_CLOSE = 3,
    WLAN_SP_MGK_INFORM = 4,
    WLAN_SP_MGK_ACK = 5,
};

/* Mesh action codes */
enum ieee80211_mesh_actioncode {
    WLAN_MESH_ACTION_LINK_METRIC_REPORT,
    WLAN_MESH_ACTION_HWMP_PATH_SELECTION,
    WLAN_MESH_ACTION_GATE_ANNOUNCEMENT,
    WLAN_MESH_ACTION_CONGESTION_CONTROL_NOTIFICATION,
    WLAN_MESH_ACTION_MCCA_SETUP_REQUEST,
    WLAN_MESH_ACTION_MCCA_SETUP_REPLY,
    WLAN_MESH_ACTION_MCCA_ADVERTISEMENT_REQUEST,
    WLAN_MESH_ACTION_MCCA_ADVERTISEMENT,
    WLAN_MESH_ACTION_MCCA_TEARDOWN,
    WLAN_MESH_ACTION_TBTT_ADJUSTMENT_REQUEST,
    WLAN_MESH_ACTION_TBTT_ADJUSTMENT_RESPONSE,
};

/* Security key length */
enum ieee80211_key_len {
    WLAN_KEY_LEN_WEP40 = 5,
    WLAN_KEY_LEN_WEP104 = 13,
    WLAN_KEY_LEN_CCMP = 16,
    WLAN_KEY_LEN_TKIP = 32,
    WLAN_KEY_LEN_AES_CMAC = 16,
};

/* Public action codes */
enum ieee80211_pub_actioncode {
    WLAN_PUB_ACTION_TDLS_DISCOVER_RES = 14,
};

/* TDLS action codes */
enum ieee80211_tdls_actioncode {
    WLAN_TDLS_SETUP_REQUEST = 0,
    WLAN_TDLS_SETUP_RESPONSE = 1,
    WLAN_TDLS_SETUP_CONFIRM = 2,
    WLAN_TDLS_TEARDOWN = 3,
    WLAN_TDLS_PEER_TRAFFIC_INDICATION = 4,
    WLAN_TDLS_CHANNEL_SWITCH_REQUEST = 5,
    WLAN_TDLS_CHANNEL_SWITCH_RESPONSE = 6,
    WLAN_TDLS_PEER_PSM_REQUEST = 7,
    WLAN_TDLS_PEER_PSM_RESPONSE = 8,
    WLAN_TDLS_PEER_TRAFFIC_RESPONSE = 9,
    WLAN_TDLS_DISCOVERY_REQUEST = 10,
};

/*
 * TDLS capabililites to be enabled in the 5th byte of the
 * @WLAN_EID_EXT_CAPABILITY information element
 */
#define WLAN_EXT_CAPA5_TDLS_ENABLED BIT(5)
#define WLAN_EXT_CAPA5_TDLS_PROHIBITED  BIT(6)

/* TDLS specific payload type in the LLC/SNAP header */
#define WLAN_TDLS_SNAP_RFTYPE   0x2

enum {
    IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET = 1,
    IEEE80211_SYNC_METHOD_VENDOR = 255,
};

enum {
    IEEE80211_PATH_PROTOCOL_HWMP = 1,
    IEEE80211_PATH_PROTOCOL_VENDOR = 255,
};

enum {
    IEEE80211_PATH_METRIC_AIRTIME = 1,
    IEEE80211_PATH_METRIC_VENDOR = 255,
};

enum ieee80211_root_mode_identifier {
    IEEE80211_ROOTMODE_NO_ROOT = 0,
    IEEE80211_ROOTMODE_ROOT = 1,
    IEEE80211_PROACTIVE_PREQ_NO_PREP = 2,
    IEEE80211_PROACTIVE_PREQ_WITH_PREP = 3,
    IEEE80211_PROACTIVE_RANN = 4,
};

/*
 * IEEE 802.11-2007 7.3.2.9 Country information element
 *
 * Minimum length is 8 octets, ie len must be evenly
 * divisible by 2
 */

/* Although the spec says 8 I'm seeing 6 in practice */
#define IEEE80211_COUNTRY_IE_MIN_LEN    6

/* The Country String field of the element shall be 3 octets in length */
#define IEEE80211_COUNTRY_STRING_LEN    3

/*
 * For regulatory extension stuff see IEEE 802.11-2007
 * Annex I (page 1141) and Annex J (page 1147). Also
 * review 7.3.2.9.
 *
 * When dot11RegulatoryClassesRequired is true and the
 * first_channel/reg_extension_id is >= 201 then the IE
 * compromises of the 'ext' struct represented below:
 *
 *  - Regulatory extension ID - when generating IE this just needs
 *    to be monotonically increasing for each triplet passed in
 *    the IE
 *  - Regulatory class - index into set of rules
 *  - Coverage class - index into air propagation time (Table 7-27),
 *    in microseconds, you can compute the air propagation time from
 *    the index by multiplying by 3, so index 10 yields a propagation
 *    of 10 us. Valid values are 0-31, values 32-255 are not defined
 *    yet. A value of 0 inicates air propagation of <= 1 us.
 *
 *  See also Table I.2 for Emission limit sets and table
 *  I.3 for Behavior limit sets. Table J.1 indicates how to map
 *  a reg_class to an emission limit set and behavior limit set.
 */
#define IEEE80211_COUNTRY_EXTENSION_ID 201

/*
 *  Channels numbers in the IE must be monotonically increasing
 *  if dot11RegulatoryClassesRequired is not true.
 *
 *  If dot11RegulatoryClassesRequired is true consecutive
 *  subband triplets following a regulatory triplet shall
 *  have monotonically increasing first_channel number fields.
 *
 *  Channel numbers shall not overlap.
 *
 *  Note that max_power is signed.
 */
struct ieee80211_country_ie_triplet {
    union {
        struct {
            u8 first_channel;
            u8 num_channels;
            s8 max_power;
        } __attribute__ ((packed)) chans;
        struct {
            u8 reg_extension_id;
            u8 reg_class;
            u8 coverage_class;
        } __attribute__ ((packed)) ext;
    };
} __attribute__ ((packed));

enum ieee80211_timeout_interval_type {
    WLAN_TIMEOUT_REASSOC_DEADLINE = 1 /* 802.11r */,
    WLAN_TIMEOUT_KEY_LIFETIME = 2 /* 802.11r */,
    WLAN_TIMEOUT_ASSOC_COMEBACK = 3 /* 802.11w */,
};

/* BACK action code */
enum ieee80211_back_actioncode {
    WLAN_ACTION_ADDBA_REQ = 0,
    WLAN_ACTION_ADDBA_RESP = 1,
    WLAN_ACTION_DELBA = 2,
};

/* BACK (block-ack) parties */
enum ieee80211_back_parties {
    WLAN_BACK_RECIPIENT = 0,
    WLAN_BACK_INITIATOR = 1,
};

/* SA Query action */
enum ieee80211_sa_query_action {
    WLAN_ACTION_SA_QUERY_REQUEST = 0,
    WLAN_ACTION_SA_QUERY_RESPONSE = 1,
};


/* cipher suite selectors */
#define WLAN_CIPHER_SUITE_USE_GROUP 0x000FAC00
#define WLAN_CIPHER_SUITE_WEP40     0x000FAC01
#define WLAN_CIPHER_SUITE_TKIP      0x000FAC02
/* reserved:                0x000FAC03 */
#define WLAN_CIPHER_SUITE_CCMP      0x000FAC04
#define WLAN_CIPHER_SUITE_WEP104    0x000FAC05
#define WLAN_CIPHER_SUITE_AES_CMAC  0x000FAC06
#define WLAN_CIPHER_SUITE_GCMP      0x000FAC08

#define WLAN_CIPHER_SUITE_SMS4      0x00147201

/* AKM suite selectors */
#define WLAN_AKM_SUITE_8021X        0x000FAC01
#define WLAN_AKM_SUITE_PSK      0x000FAC02
#define WLAN_AKM_SUITE_SAE          0x000FAC08
#define WLAN_AKM_SUITE_FT_OVER_SAE  0x000FAC09

#define WLAN_MAX_KEY_LEN        32

#define WLAN_PMKID_LEN          16

#define WLAN_OUI_WFA            0x506f9a
#define WLAN_OUI_TYPE_WFA_P2P       9
#define WLAN_OUI_MICROSOFT      0x0050f2
#define WLAN_OUI_TYPE_MICROSOFT_WPA 1
#define WLAN_OUI_TYPE_MICROSOFT_WMM 2
#define WLAN_OUI_TYPE_MICROSOFT_WPS 4

/*
 * WMM/802.11e Tspec Element
 */
#define IEEE80211_WMM_IE_TSPEC_TID_MASK     0x0F
#define IEEE80211_WMM_IE_TSPEC_TID_SHIFT    1

enum ieee80211_tspec_status_code {
    IEEE80211_TSPEC_STATUS_ADMISS_ACCEPTED = 0,
    IEEE80211_TSPEC_STATUS_ADDTS_INVAL_PARAMS = 0x1,
};

struct ieee80211_tspec_ie {
    u8 element_id;
    u8 len;
    u8 oui[3];
    u8 oui_type;
    u8 oui_subtype;
    u8 version;
    __le16 tsinfo;
    u8 tsinfo_resvd;
    __le16 nominal_msdu;
    __le16 max_msdu;
    __le32 min_service_int;
    __le32 max_service_int;
    __le32 inactivity_int;
    __le32 suspension_int;
    __le32 service_start_time;
    __le32 min_data_rate;
    __le32 mean_data_rate;
    __le32 peak_data_rate;
    __le32 max_burst_size;
    __le32 delay_bound;
    __le32 min_phy_rate;
    __le16 sba;
    __le16 medium_time;
} __packed;

static inline u8 *ieee80211_get_qos_ctl(struct ieee80211_hdr *hdr)
{
    if (ieee80211_has_a4(hdr->frame_control))
        return (u8 *)hdr + 30;
    else
        return (u8 *)hdr + 24;
}

static inline u8 *ieee80211_get_SA(struct ieee80211_hdr *hdr)
{
    if (ieee80211_has_a4(hdr->frame_control))
        return hdr->addr4;
    if (ieee80211_has_fromds(hdr->frame_control))
        return hdr->addr3;
    return hdr->addr2;
}

static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
{
    if (ieee80211_has_tods(hdr->frame_control))
        return hdr->addr3;
    else
        return hdr->addr1;
}

static inline bool ieee80211_is_robust_mgmt_frame(struct ieee80211_hdr *hdr)
{
    if (ieee80211_is_disassoc(hdr->frame_control) ||
        ieee80211_is_deauth(hdr->frame_control))
        return true;

    if (ieee80211_is_action(hdr->frame_control)) {
        u8 *category;

        /*
         * Action frames, excluding Public Action frames, are Robust
         * Management Frames. However, if we are looking at a Protected
         * frame, skip the check since the data may be encrypted and
         * the frame has already been found to be a Robust Management
         * Frame (by the other end).
         */
        if (ieee80211_has_protected(hdr->frame_control))
            return true;
        category = ((u8 *) hdr) + 24;
        return *category != WLAN_CATEGORY_PUBLIC &&
            *category != WLAN_CATEGORY_HT &&
            *category != WLAN_CATEGORY_SELF_PROTECTED &&
            *category != WLAN_CATEGORY_VENDOR_SPECIFIC;
    }

    return false;
}

static inline bool ieee80211_is_public_action(struct ieee80211_hdr *hdr,
                          size_t len)
{
    struct ieee80211_mgmt *mgmt = (void *)hdr;

    if (len < IEEE80211_MIN_ACTION_SIZE)
        return false;
    if (!ieee80211_is_action(hdr->frame_control))
        return false;
    return mgmt->u.action.category == WLAN_CATEGORY_PUBLIC;
}

static inline int ieee80211_dsss_chan_to_freq(int channel)
{
    if ((channel > 0) && (channel < 14))
        return 2407 + (channel * 5);
    else if (channel == 14)
        return 2484;
    else
        return -1;
}

static inline int ieee80211_freq_to_dsss_chan(int freq)
{
    if ((freq >= 2410) && (freq < 2475))
        return (freq - 2405) / 5;
    else if ((freq >= 2482) && (freq < 2487))
        return 14;
    else
        return -1;
}

static inline unsigned long ieee80211_tu_to_usec(unsigned long tu)
{
    return 1024 * tu;
}

static inline bool ieee80211_check_tim(struct ieee80211_tim_ie *tim,
                       u8 tim_len, u16 aid)
{
    u8 mask;
    u8 index, indexn1, indexn2;

    if (unlikely(!tim || tim_len < sizeof(*tim)))
        return false;

    aid &= 0x3fff;
    index = aid / 8;
    mask  = 1 << (aid & 7);

    indexn1 = tim->bitmap_ctrl & 0xfe;
    indexn2 = tim_len + indexn1 - 4;

    if (index < indexn1 || index > indexn2)
        return false;

    index -= indexn1;

    return !!(tim->virtual_map[index] & mask);
}

#endif /* LINUX_IEEE80211_H */