/*
 * IEEE 802.11 defines
 *
 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
 * <jkmaline@cc.hut.fi>
 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
 * Copyright (c) 2005, Devicescape Software, Inc.
 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
 *
 * 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_SCTL_FRAG             0x000F
#define IEEE80211_SCTL_SEQ              0xFFF0

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

/* 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_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


/* 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
/* 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));

/**
 * ieee80211_has_tods - check if IEEE80211_FCTL_TODS is set
 * @fc: frame control bytes in little-endian byteorder
 */
static inline int ieee80211_has_tods(__le16 fc)
{
        return (fc & cpu_to_le16(IEEE80211_FCTL_TODS)) != 0;
}

/**
 * ieee80211_has_fromds - check if IEEE80211_FCTL_FROMDS is set
 * @fc: frame control bytes in little-endian byteorder
 */
static inline int ieee80211_has_fromds(__le16 fc)
{
        return (fc & cpu_to_le16(IEEE80211_FCTL_FROMDS)) != 0;
}

/**
 * ieee80211_has_a4 - check if IEEE80211_FCTL_TODS and IEEE80211_FCTL_FROMDS are set
 * @fc: frame control bytes in little-endian byteorder
 */
static inline int ieee80211_has_a4(__le16 fc)
{
        __le16 tmp = cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
        return (fc & tmp) == tmp;
}

/**
 * ieee80211_has_morefrags - check if IEEE80211_FCTL_MOREFRAGS is set
 * @fc: frame control bytes in little-endian byteorder
 */
static inline int ieee80211_has_morefrags(__le16 fc)
{
        return (fc & cpu_to_le16(IEEE80211_FCTL_MOREFRAGS)) != 0;
}

/**
 * ieee80211_has_retry - check if IEEE80211_FCTL_RETRY is set
 * @fc: frame control bytes in little-endian byteorder
 */
static inline int ieee80211_has_retry(__le16 fc)
{
        return (fc & cpu_to_le16(IEEE80211_FCTL_RETRY)) != 0;
}

/**
 * ieee80211_has_pm - check if IEEE80211_FCTL_PM is set
 * @fc: frame control bytes in little-endian byteorder
 */
static inline int ieee80211_has_pm(__le16 fc)
{
        return (fc & cpu_to_le16(IEEE80211_FCTL_PM)) != 0;
}

/**
 * ieee80211_has_moredata - check if IEEE80211_FCTL_MOREDATA is set
 * @fc: frame control bytes in little-endian byteorder
 */
static inline int ieee80211_has_moredata(__le16 fc)
{
        return (fc & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) != 0;
}

/**
 * ieee80211_has_protected - check if IEEE80211_FCTL_PROTECTED is set
 * @fc: frame control bytes in little-endian byteorder
 */
static inline int ieee80211_has_protected(__le16 fc)
{
        return (fc & cpu_to_le16(IEEE80211_FCTL_PROTECTED)) != 0;
}

/**
 * ieee80211_has_order - check if IEEE80211_FCTL_ORDER is set
 * @fc: frame control bytes in little-endian byteorder
 */
static inline int ieee80211_has_order(__le16 fc)
{
        return (fc & cpu_to_le16(IEEE80211_FCTL_ORDER)) != 0;
}

/**
 * ieee80211_is_mgmt - check if type is IEEE80211_FTYPE_MGMT
 * @fc: frame control bytes in little-endian byteorder
 */
static inline int ieee80211_is_mgmt(__le16 fc)
{
        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
               cpu_to_le16(IEEE80211_FTYPE_MGMT);
}

/**
 * ieee80211_is_ctl - check if type is IEEE80211_FTYPE_CTL
 * @fc: frame control bytes in little-endian byteorder
 */
static inline int ieee80211_is_ctl(__le16 fc)
{
        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
               cpu_to_le16(IEEE80211_FTYPE_CTL);
}

/**
 * ieee80211_is_data - check if type is IEEE80211_FTYPE_DATA
 * @fc: frame control bytes in little-endian byteorder
 */
static inline int ieee80211_is_data(__le16 fc)
{
        return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE)) ==
               cpu_to_le16(IEEE80211_FTYPE_DATA);
}

/**
 * ieee80211_is_data_qos - check if type is IEEE80211_FTYPE_DATA and IEEE80211_STYPE_QOS_DATA is set
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_data_present - check if type is IEEE80211_FTYPE_DATA and has data
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_assoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_REQ
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_assoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ASSOC_RESP
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_reassoc_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_REQ
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_reassoc_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_REASSOC_RESP
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_probe_req - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_REQ
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_probe_resp - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_PROBE_RESP
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_beacon - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_BEACON
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_atim - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ATIM
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_disassoc - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DISASSOC
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_auth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_AUTH
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_deauth - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_DEAUTH
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_action - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ACTION
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_back_req - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK_REQ
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_back - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_BACK
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_pspoll - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_PSPOLL
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_rts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_RTS
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_cts - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CTS
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_ack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_ACK
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_cfend - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFEND
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_cfendack - check if IEEE80211_FTYPE_CTL && IEEE80211_STYPE_CFENDACK
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_nullfunc - check if frame is a regular (non-QoS) nullfunc frame
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

/**
 * ieee80211_is_qos_nullfunc - check if frame is a QoS nullfunc frame
 * @fc: frame control bytes in little-endian byteorder
 */
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);
}

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

/**
 * struct ieee80211_quiet_ie
 *
 * This structure refers to "Quiet information element"
 */
struct ieee80211_quiet_ie {
        u8 count;
        u8 period;
        __le16 duration;
        __le16 offset;
} __attribute__ ((packed));

/**
 * struct ieee80211_msrment_ie
 *
 * This structure refers to "Measurement Request/Report information element"
 */
struct ieee80211_msrment_ie {
        u8 token;
        u8 mode;
        u8 type;
        u8 request[0];
} __attribute__ ((packed));

/**
 * struct ieee80211_channel_sw_ie
 *
 * This structure refers to "Channel Switch Announcement information element"
 */
struct ieee80211_channel_sw_ie {
        u8 mode;
        u8 new_ch_num;
        u8 count;
} __attribute__ ((packed));

/**
 * struct ieee80211_tim
 *
 * This structure refers to "Traffic Indication Map information element"
 */
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
 *
 * This structure refers to "Mesh Configuration information element"
 */
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
 *
 * This structure refers to "Root Announcement information element"
 */
struct ieee80211_rann_ie {
        u8 rann_flags;
        u8 rann_hopcount;
        u8 rann_ttl;
        u8 rann_addr[6];
        u32 rann_seq;
        u32 rann_interval;
        u32 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));

/* 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 - HT Block Ack Request
 *
 * This structure refers to "HT BlockAckReq" as
 * described in 802.11n draft section 7.2.1.7.1
 */
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 - MCS information
 * @rx_mask: RX mask
 * @rx_highest: highest supported RX rate. If set represents
 *      the highest supported RX data rate in units of 1 Mbps.
 *      If this field is 0 this value should not be used to
 *      consider the highest RX data rate supported.
 * @tx_params: TX parameters
 */
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 - HT capabilities
 *
 * This structure is the "HT capabilities element" as
 * described in 802.11n D5.0 7.3.2.57
 */
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_info - HT information
 *
 * This structure is the "HT information element" as
 * described in 802.11n D5.0 7.3.2.58

 */
struct ieee80211_ht_info {
        u8 control_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
#define IEEE80211_HT_PARAM_SPSMP_SUPPORT                0x10
#define IEEE80211_HT_PARAM_SERV_INTERVAL_GRAN           0xE0

/* 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

/* 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)
/* 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,
};

/* 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,
};


/* 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_INFORMATION = 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,
};

/* 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_WMM = 17,
        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 - mesh path selection protocol identifier
 *
 * @IEEE80211_PATH_PROTOCOL_HWMP: the default path selection protocol
 * @IEEE80211_PATH_PROTOCOL_VENDOR: a vendor specific protocol that will
 * be specified in a vendor specific information element
 */
enum {
        IEEE80211_PATH_PROTOCOL_HWMP = 0,
        IEEE80211_PATH_PROTOCOL_VENDOR = 255,
};

/**
 * enum - mesh path selection metric identifier
 *
 * @IEEE80211_PATH_METRIC_AIRTIME: the default path selection metric
 * @IEEE80211_PATH_METRIC_VENDOR: a vendor specific metric that will be
 * specified in a vendor specific information element
 */
enum {
        IEEE80211_PATH_METRIC_AIRTIME = 0,
        IEEE80211_PATH_METRIC_VENDOR = 255,
};


/*
 * 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

/* 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

/*
 * 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;

/**
 * ieee80211_get_qos_ctl - get pointer to qos control bytes
 * @hdr: the frame
 *
 * The qos ctrl bytes come after the frame_control, duration, seq_num
 * and 3 or 4 addresses of length ETH_ALEN.
 * 3 addr: 2 + 2 + 2 + 3*6 = 24
 * 4 addr: 2 + 2 + 2 + 4*6 = 30
 */
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;
}

/**
 * ieee80211_get_SA - get pointer to SA
 * @hdr: the frame
 *
 * Given an 802.11 frame, this function returns the offset
 * to the source address (SA). It does not verify that the
 * header is long enough to contain the address, and the
 * header must be long enough to contain the frame control
 * field.
 */
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;
}

/**
 * ieee80211_get_DA - get pointer to DA
 * @hdr: the frame
 *
 * Given an 802.11 frame, this function returns the offset
 * to the destination address (DA). It does not verify that
 * the header is long enough to contain the address, and the
 * header must be long enough to contain the frame control
 * field.
 */
static inline u8 *ieee80211_get_DA(struct ieee80211_hdr *hdr)
{
        if (ieee80211_has_tods(hdr->frame_control))
                return hdr->addr3;
        else
                return hdr->addr1;
}

/**
 * ieee80211_is_robust_mgmt_frame - check if frame is a robust management frame
 * @hdr: the frame (buffer must include at least the first octet of payload)
 */
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;
}

/**
 * ieee80211_fhss_chan_to_freq - get channel frequency
 * @channel: the FHSS channel
 *
 * Convert IEEE802.11 FHSS channel to frequency (MHz)
 * Ref IEEE 802.11-2007 section 14.6
 */
static inline int ieee80211_fhss_chan_to_freq(int channel)
{
        if ((channel > 1) && (channel < 96))
                return channel + 2400;
        else
                return -1;
}

/**
 * ieee80211_freq_to_fhss_chan - get channel
 * @freq: the channels frequency
 *
 * Convert frequency (MHz) to IEEE802.11 FHSS channel
 * Ref IEEE 802.11-2007 section 14.6
 */
static inline int ieee80211_freq_to_fhss_chan(int freq)
{
        if ((freq > 2401) && (freq < 2496))
                return freq - 2400;
        else
                return -1;
}

/**
 * ieee80211_dsss_chan_to_freq - get channel center frequency
 * @channel: the DSSS channel
 *
 * Convert IEEE802.11 DSSS channel to the center frequency (MHz).
 * Ref IEEE 802.11-2007 section 15.6
 */
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;
}

/**
 * ieee80211_freq_to_dsss_chan - get channel
 * @freq: the frequency
 *
 * Convert frequency (MHz) to IEEE802.11 DSSS channel
 * Ref IEEE 802.11-2007 section 15.6
 *
 * This routine selects the channel with the closest center frequency.
 */
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;
}

/* Convert IEEE802.11 HR DSSS channel to frequency (MHz) and back
 * Ref IEEE 802.11-2007 section 18.4.6.2
 *
 * The channels and frequencies are the same as those defined for DSSS
 */
#define ieee80211_hr_chan_to_freq(chan) ieee80211_dsss_chan_to_freq(chan)
#define ieee80211_freq_to_hr_chan(freq) ieee80211_freq_to_dsss_chan(freq)

/* Convert IEEE802.11 ERP channel to frequency (MHz) and back
 * Ref IEEE 802.11-2007 section 19.4.2
 */
#define ieee80211_erp_chan_to_freq(chan) ieee80211_hr_chan_to_freq(chan)
#define ieee80211_freq_to_erp_chan(freq) ieee80211_freq_to_hr_chan(freq)

/**
 * ieee80211_ofdm_chan_to_freq - get channel center frequency
 * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
 * @channel: the OFDM channel
 *
 * Convert IEEE802.11 OFDM channel to center frequency (MHz)
 * Ref IEEE 802.11-2007 section 17.3.8.3.2
 */
static inline int ieee80211_ofdm_chan_to_freq(int s_freq, int channel)
{
        if ((channel > 0) && (channel <= 200) &&
            (s_freq >= 4000))
                return s_freq + (channel * 5);
        else
                return -1;
}

/**
 * ieee80211_freq_to_ofdm_channel - get channel
 * @s_freq: starting frequency == (dotChannelStartingFactor/2) MHz
 * @freq: the frequency
 *
 * Convert frequency (MHz) to IEEE802.11 OFDM channel
 * Ref IEEE 802.11-2007 section 17.3.8.3.2
 *
 * This routine selects the channel with the closest center frequency.
 */
static inline int ieee80211_freq_to_ofdm_chan(int s_freq, int freq)
{
        if ((freq > (s_freq + 2)) && (freq <= (s_freq + 1202)) &&
            (s_freq >= 4000))
                return (freq + 2 - s_freq) / 5;
        else
                return -1;
}

/**
 * ieee80211_tu_to_usec - convert time units (TU) to microseconds
 * @tu: the TUs
 */
static inline unsigned long ieee80211_tu_to_usec(unsigned long tu)
{
        return 1024 * tu;
}

/**
 * ieee80211_check_tim - check if AID bit is set in TIM
 * @tim: the TIM IE
 * @tim_len: length of the TIM IE
 * @aid: the AID to look for
 */
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 */