ieee80211.h

/*
 * 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 <linux/if_ether.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


#define IEEE80211_SN_MASK		((IEEE80211_SCTL_SEQ) >> 4)
#define IEEE80211_MAX_SN		IEEE80211_SN_MASK
#define IEEE80211_SN_MODULO		(IEEE80211_MAX_SN + 1)

static inline int ieee80211_sn_less(u16 sn1, u16 sn2)
{
	return ((sn1 - sn2) & IEEE80211_SN_MASK) > (IEEE80211_SN_MODULO >> 1);
}

static inline u16 ieee80211_sn_add(u16 sn1, u16 sn2)
{
	return (sn1 + sn2) & IEEE80211_SN_MASK;
}

static inline u16 ieee80211_sn_inc(u16 sn)
{
	return ieee80211_sn_add(sn, 1);
}

static inline u16 ieee80211_sn_sub(u16 sn1, u16 sn2)
{
	return (sn1 - sn2) & IEEE80211_SN_MASK;
}

#define IEEE80211_SEQ_TO_SN(seq)	(((seq) & IEEE80211_SCTL_SEQ) >> 4)
#define IEEE80211_SN_TO_SEQ(ssn)	(((ssn) << 4) & IEEE80211_SCTL_SEQ)

/* 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
#define IEEE80211_MAX_MESH_PEERINGS	63
/* 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_NUM_TIDS		16

#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

/* Mesh Power Save Level */
#define IEEE80211_QOS_CTL_MESH_PS_LEVEL		0x0200
/* Mesh Receiver Service Period Initiated */
#define IEEE80211_QOS_CTL_RSPI			0x0400

/* 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[ETH_ALEN];
	u8 addr2[ETH_ALEN];
	u8 addr3[ETH_ALEN];
	__le16 seq_ctrl;
	u8 addr4[ETH_ALEN];
} __packed __aligned(2);

struct ieee80211_hdr_3addr {
	__le16 frame_control;
	__le16 duration_id;
	u8 addr1[ETH_ALEN];
	u8 addr2[ETH_ALEN];
	u8 addr3[ETH_ALEN];
	__le16 seq_ctrl;
} __packed __aligned(2);

struct ieee80211_qos_hdr {
	__le16 frame_control;
	__le16 duration_id;
	u8 addr1[ETH_ALEN];
	u8 addr2[ETH_ALEN];
	u8 addr3[ETH_ALEN];
	__le16 seq_ctrl;
	__le16 qos_ctrl;
} __packed __aligned(2);

/**
 * 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);
}

/**
 * ieee80211_is_first_frag - check if IEEE80211_SCTL_FRAG is not set
 * @seq_ctrl: frame sequence control bytes in little-endian byteorder
 */
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[ETH_ALEN];
	u8 eaddr2[ETH_ALEN];
} __packed __aligned(2);

/* 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 - mesh PREQ element flags
 *
 * @IEEE80211_PREQ_PROACTIVE_PREP_FLAG: proactive PREP subfield
 */
enum ieee80211_preq_flags {
	IEEE80211_PREQ_PROACTIVE_PREP_FLAG	= 1<<2,
};

/**
 * enum ieee80211_preq_target_flags - mesh PREQ element per target flags
 *
 * @IEEE80211_PREQ_TO_FLAG: target only subfield
 * @IEEE80211_PREQ_USN_FLAG: unknown target HWMP sequence number subfield
 */
enum ieee80211_preq_target_flags {
	IEEE80211_PREQ_TO_FLAG	= 1<<0,
	IEEE80211_PREQ_USN_FLAG	= 1<<2,
};

/**
 * struct ieee80211_quiet_ie
 *
 * This structure refers to "Quiet information element"
 */
struct ieee80211_quiet_ie {
	u8 count;
	u8 period;
	__le16 duration;
	__le16 offset;
} __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];
} __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;
} __packed;

/**
 * struct ieee80211_ext_chansw_ie
 *
 * This structure represents the "Extended Channel Switch Announcement element"
 */
struct ieee80211_ext_chansw_ie {
	u8 mode;
	u8 new_operating_class;
	u8 new_ch_num;
	u8 count;
} __packed;

/**
 * struct ieee80211_sec_chan_offs_ie - secondary channel offset IE
 * @sec_chan_offs: secondary channel offset, uses IEEE80211_HT_PARAM_CHA_SEC_*
 *	values here
 * This structure represents the "Secondary Channel Offset element"
 */
struct ieee80211_sec_chan_offs_ie {
	u8 sec_chan_offs;
} __packed;

/**
 * struct ieee80211_mesh_chansw_params_ie - mesh channel switch parameters IE
 *
 * This structure represents the "Mesh Channel Switch Paramters element"
 */
struct ieee80211_mesh_chansw_params_ie {
	u8 mesh_ttl;
	u8 mesh_flags;
	__le16 mesh_reason;
	__le16 mesh_pre_value;
} __packed;

/**
 * struct ieee80211_wide_bw_chansw_ie - wide bandwidth channel switch IE
 */
struct ieee80211_wide_bw_chansw_ie {
	u8 new_channel_width;
	u8 new_center_freq_seg0, new_center_freq_seg1;
} __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];
} __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;
} __packed;

/**
 * enum mesh_config_capab_flags - Mesh Configuration IE capability field flags
 *
 * @IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS: STA is willing to establish
 *	additional mesh peerings with other mesh STAs
 * @IEEE80211_MESHCONF_CAPAB_FORWARDING: the STA forwards MSDUs
 * @IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING: TBTT adjustment procedure
 *	is ongoing
 * @IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL: STA is in deep sleep mode or has
 *	neighbors in deep sleep mode
 */
enum mesh_config_capab_flags {
	IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS		= 0x01,
	IEEE80211_MESHCONF_CAPAB_FORWARDING		= 0x08,
	IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING		= 0x20,
	IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL	= 0x40,
};

/**
 * mesh channel switch parameters element's flag indicator
 *
 */
#define WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT BIT(0)
#define WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR BIT(1)
#define WLAN_EID_CHAN_SWITCH_PARAM_REASON BIT(2)

/**
 * 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[ETH_ALEN];
	__le32 rann_seq;
	__le32 rann_interval;
	__le32 rann_metric;
} __packed;

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

enum ieee80211_ht_chanwidth_values {
	IEEE80211_HT_CHANWIDTH_20MHZ = 0,
	IEEE80211_HT_CHANWIDTH_ANY = 1,
};

/**
 * enum ieee80211_opmode_bits - VHT operating mode field bits
 * @IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK: channel width mask
 * @IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ: 20 MHz channel width
 * @IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ: 40 MHz channel width
 * @IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ: 80 MHz channel width
 * @IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ: 160 MHz or 80+80 MHz channel width
 * @IEEE80211_OPMODE_NOTIF_RX_NSS_MASK: number of spatial streams mask
 *	(the NSS value is the value of this field + 1)
 * @IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT: number of spatial streams shift
 * @IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF: indicates streams in SU-MIMO PPDU
 *	using a beamforming steering matrix
 */
enum ieee80211_vht_opmode_bits {
	IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK	= 3,
	IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ	= 0,
	IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ	= 1,
	IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ	= 2,
	IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ	= 3,
	IEEE80211_OPMODE_NOTIF_RX_NSS_MASK	= 0x70,
	IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT	= 4,
	IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF	= 0x80,
};

#define WLAN_SA_QUERY_TR_ID_LEN 2

struct ieee80211_mgmt {
	__le16 frame_control;
	__le16 duration;
	u8 da[ETH_ALEN];
	u8 sa[ETH_ALEN];
	u8 bssid[ETH_ALEN];
	__le16 seq_ctrl;
	union {
		struct {
			__le16 auth_alg;
			__le16 auth_transaction;
			__le16 status_code;
			/* possibly followed by Challenge text */
			u8 variable[0];
		} __packed auth;
		struct {
			__le16 reason_code;
		} __packed deauth;
		struct {
			__le16 capab_info;
			__le16 listen_interval;
			/* followed by SSID and Supported rates */
			u8 variable[0];
		} __packed assoc_req;
		struct {
			__le16 capab_info;
			__le16 status_code;
			__le16 aid;
			/* followed by Supported rates */
			u8 variable[0];
		} __packed assoc_resp, reassoc_resp;
		struct {
			__le16 capab_info;
			__le16 listen_interval;
			u8 current_ap[ETH_ALEN];
			/* followed by SSID and Supported rates */
			u8 variable[0];
		} __packed reassoc_req;
		struct {
			__le16 reason_code;
		} __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];
		} __packed beacon;
		struct {
			/* only variable items: SSID, Supported rates */
			u8 variable[0];
		} __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];
		} __packed probe_resp;
		struct {
			u8 category;
			union {
				struct {
					u8 action_code;
					u8 dialog_token;
					u8 status_code;
					u8 variable[0];
				} __packed wme_action;
				struct{
					u8 action_code;
					u8 variable[0];
				} __packed chan_switch;
				struct{
					u8 action_code;
					struct ieee80211_ext_chansw_ie data;
					u8 variable[0];
				} __packed ext_chan_switch;
				struct{
					u8 action_code;
					u8 dialog_token;
					u8 element_id;
					u8 length;
					struct ieee80211_msrment_ie msr_elem;
				} __packed measurement;
				struct{
					u8 action_code;
					u8 dialog_token;
					__le16 capab;
					__le16 timeout;
					__le16 start_seq_num;
				} __packed addba_req;
				struct{
					u8 action_code;
					u8 dialog_token;
					__le16 status;
					__le16 capab;
					__le16 timeout;
				} __packed addba_resp;
				struct{
					u8 action_code;
					__le16 params;
					__le16 reason_code;
				} __packed delba;
				struct {
					u8 action_code;
					u8 variable[0];
				} __packed self_prot;
				struct{
					u8 action_code;
					u8 variable[0];
				} __packed mesh_action;
				struct {
					u8 action;
					u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
				} __packed sa_query;
				struct {
					u8 action;
					u8 smps_control;
				} __packed ht_smps;
				struct {
					u8 action_code;
					u8 chanwidth;
				} __packed ht_notify_cw;
				struct {
					u8 action_code;
					u8 dialog_token;
					__le16 capability;
					u8 variable[0];
				} __packed tdls_discover_resp;
				struct {
					u8 action_code;
					u8 operating_mode;
				} __packed vht_opmode_notif;
			} u;
		} __packed action;
	} u;
} __packed __aligned(2);

/* 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];
} __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[ETH_ALEN];
	u8 ta[ETH_ALEN];
} __packed __aligned(2);

struct ieee80211_cts {
	__le16 frame_control;
	__le16 duration;
	u8 ra[ETH_ALEN];
} __packed __aligned(2);

struct ieee80211_pspoll {
	__le16 frame_control;
	__le16 aid;
	u8 bssid[ETH_ALEN];
	u8 ta[ETH_ALEN];
} __packed __aligned(2);

/* TDLS */

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

struct ieee80211_tdls_data {
	u8 da[ETH_ALEN];
	u8 sa[ETH_ALEN];
	__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;

/*
 * Peer-to-Peer IE attribute related definitions.
 */
/**
 * enum ieee80211_p2p_attr_id - identifies type of peer-to-peer attribute.
 */
enum ieee80211_p2p_attr_id {
	IEEE80211_P2P_ATTR_STATUS = 0,
	IEEE80211_P2P_ATTR_MINOR_REASON,
	IEEE80211_P2P_ATTR_CAPABILITY,
	IEEE80211_P2P_ATTR_DEVICE_ID,
	IEEE80211_P2P_ATTR_GO_INTENT,
	IEEE80211_P2P_ATTR_GO_CONFIG_TIMEOUT,
	IEEE80211_P2P_ATTR_LISTEN_CHANNEL,
	IEEE80211_P2P_ATTR_GROUP_BSSID,
	IEEE80211_P2P_ATTR_EXT_LISTEN_TIMING,
	IEEE80211_P2P_ATTR_INTENDED_IFACE_ADDR,
	IEEE80211_P2P_ATTR_MANAGABILITY,
	IEEE80211_P2P_ATTR_CHANNEL_LIST,
	IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
	IEEE80211_P2P_ATTR_DEVICE_INFO,
	IEEE80211_P2P_ATTR_GROUP_INFO,
	IEEE80211_P2P_ATTR_GROUP_ID,
	IEEE80211_P2P_ATTR_INTERFACE,
	IEEE80211_P2P_ATTR_OPER_CHANNEL,
	IEEE80211_P2P_ATTR_INVITE_FLAGS,
	/* 19 - 220: Reserved */
	IEEE80211_P2P_ATTR_VENDOR_SPECIFIC = 221,

	IEEE80211_P2P_ATTR_MAX
};

/* Notice of Absence attribute - described in P2P spec 4.1.14 */
/* Typical max value used here */
#define IEEE80211_P2P_NOA_DESC_MAX	4

struct ieee80211_p2p_noa_desc {
	u8 count;
	__le32 duration;
	__le32 interval;
	__le32 start_time;
} __packed;

struct ieee80211_p2p_noa_attr {
	u8 index;
	u8 oppps_ctwindow;
	struct ieee80211_p2p_noa_desc desc[IEEE80211_P2P_NOA_DESC_MAX];
} __packed;

#define IEEE80211_P2P_OPPPS_ENABLE_BIT		BIT(7)
#define IEEE80211_P2P_OPPPS_CTWINDOW_MASK	0x7F

/**
 * 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[ETH_ALEN];
	__u8 ta[ETH_ALEN];
	__le16 control;
	__le16 start_seq_num;
} __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];
} __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;
} __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 - HT operation IE
 *
 * This structure is the "HT operation element" as
 * described in 802.11n-2009 7.3.2.57
 */
struct ieee80211_ht_operation {
	u8 primary_chan;
	u8 ht_param;
	__le16 operation_mode;
	__le16 stbc_param;
	u8 basic_set[16];
} __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

/**
 * struct ieee80211_vht_mcs_info - VHT MCS information
 * @rx_mcs_map: RX MCS map 2 bits for each stream, total 8 streams
 * @rx_highest: Indicates highest long GI VHT PPDU data rate
 *	STA can receive. Rate expressed in units of 1 Mbps.
 *	If this field is 0 this value should not be used to
 *	consider the highest RX data rate supported.
 *	The top 3 bits of this field are reserved.
 * @tx_mcs_map: TX MCS map 2 bits for each stream, total 8 streams
 * @tx_highest: Indicates highest long GI VHT PPDU data rate
 *	STA can transmit. Rate expressed in units of 1 Mbps.
 *	If this field is 0 this value should not be used to
 *	consider the highest TX data rate supported.
 *	The top 3 bits of this field are reserved.
 */
struct ieee80211_vht_mcs_info {
	__le16 rx_mcs_map;
	__le16 rx_highest;
	__le16 tx_mcs_map;
	__le16 tx_highest;
} __packed;

/**
 * enum ieee80211_vht_mcs_support - VHT MCS support definitions
 * @IEEE80211_VHT_MCS_SUPPORT_0_7: MCSes 0-7 are supported for the
 *	number of streams
 * @IEEE80211_VHT_MCS_SUPPORT_0_8: MCSes 0-8 are supported
 * @IEEE80211_VHT_MCS_SUPPORT_0_9: MCSes 0-9 are supported
 * @IEEE80211_VHT_MCS_NOT_SUPPORTED: This number of streams isn't supported
 *
 * These definitions are used in each 2-bit subfield of the @rx_mcs_map
 * and @tx_mcs_map fields of &struct ieee80211_vht_mcs_info, which are
 * both split into 8 subfields by number of streams. These values indicate
 * which MCSes are supported for the number of streams the value appears
 * for.
 */
enum ieee80211_vht_mcs_support {
	IEEE80211_VHT_MCS_SUPPORT_0_7	= 0,
	IEEE80211_VHT_MCS_SUPPORT_0_8	= 1,
	IEEE80211_VHT_MCS_SUPPORT_0_9	= 2,
	IEEE80211_VHT_MCS_NOT_SUPPORTED	= 3,
};

/**
 * struct ieee80211_vht_cap - VHT capabilities
 *
 * This structure is the "VHT capabilities element" as
 * described in 802.11ac D3.0 8.4.2.160
 * @vht_cap_info: VHT capability info
 * @supp_mcs: VHT MCS supported rates
 */
struct ieee80211_vht_cap {
	__le32 vht_cap_info;
	struct ieee80211_vht_mcs_info supp_mcs;
} __packed;

/**
 * enum ieee80211_vht_chanwidth - VHT channel width
 * @IEEE80211_VHT_CHANWIDTH_USE_HT: use the HT operation IE to
 *	determine the channel width (20 or 40 MHz)
 * @IEEE80211_VHT_CHANWIDTH_80MHZ: 80 MHz bandwidth
 * @IEEE80211_VHT_CHANWIDTH_160MHZ: 160 MHz bandwidth
 * @IEEE80211_VHT_CHANWIDTH_80P80MHZ: 80+80 MHz bandwidth
 */
enum ieee80211_vht_chanwidth {
	IEEE80211_VHT_CHANWIDTH_USE_HT		= 0,
	IEEE80211_VHT_CHANWIDTH_80MHZ		= 1,
	IEEE80211_VHT_CHANWIDTH_160MHZ		= 2,
	IEEE80211_VHT_CHANWIDTH_80P80MHZ	= 3,
};

/**
 * struct ieee80211_vht_operation - VHT operation IE
 *
 * This structure is the "VHT operation element" as
 * described in 802.11ac D3.0 8.4.2.161
 * @chan_width: Operating channel width
 * @center_freq_seg1_idx: center freq segment 1 index
 * @center_freq_seg2_idx: center freq segment 2 index
 * @basic_mcs_set: VHT Basic MCS rate set
 */
struct ieee80211_vht_operation {
	u8 chan_width;
	u8 center_freq_seg1_idx;
	u8 center_freq_seg2_idx;
	__le16 basic_mcs_set;
} __packed;


/* 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_SUPP_CHAN_WIDTH_MASK			0x0000000C
#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_RXSTBC_MASK				0x00000700
#define IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE			0x00000800
#define IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE			0x00001000
#define IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT                  13
#define IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK			\
		(7 << IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT)
#define IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT		16
#define IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK		\
		(7 << IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT)
#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_SHIFT	23
#define IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK	\
		(7 << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT)
#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_APSD		(1<<11)
#define WLAN_CAPABILITY_RADIO_MEASURE	(1<<12)
#define WLAN_CAPABILITY_DSSS_OFDM	(1<<13)
#define WLAN_CAPABILITY_DEL_BACK	(1<<14)
#define WLAN_CAPABILITY_IMM_BACK	(1<<15)

/* DMG (60gHz) 802.11ad */
/* type - bits 0..1 */
#define WLAN_CAPABILITY_DMG_TYPE_MASK		(3<<0)
#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_SECONDARY_CHANNEL_OFFSET = 62,

	WLAN_EID_RSN = 48,
	WLAN_EID_MMIE = 76,
	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,
	WLAN_EID_OPMODE_NOTIF = 199,
	WLAN_EID_WIDE_BW_CHANNEL_SWITCH = 194,
	WLAN_EID_CHANNEL_SWITCH_WRAPPER = 196,
	WLAN_EID_EXTENDED_BSS_LOAD = 193,
	WLAN_EID_VHT_TX_POWER_ENVELOPE = 195,
	WLAN_EID_AID = 197,
	WLAN_EID_QUIET_CHANNEL = 198,

	/* 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_VHT = 21,
	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,
};

/* VHT action codes */
enum ieee80211_vht_actioncode {
	WLAN_VHT_ACTION_COMPRESSED_BF = 0,
	WLAN_VHT_ACTION_GROUPID_MGMT = 1,
	WLAN_VHT_ACTION_OPMODE_NOTIF = 2,
};

/* 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,
};

#define IEEE80211_WEP_IV_LEN		4
#define IEEE80211_WEP_ICV_LEN		4
#define IEEE80211_CCMP_HDR_LEN		8
#define IEEE80211_CCMP_MIC_LEN		8
#define IEEE80211_CCMP_PN_LEN		6
#define IEEE80211_TKIP_IV_LEN		8
#define IEEE80211_TKIP_ICV_LEN		4
#define IEEE80211_CMAC_PN_LEN		6

/* Public action codes */
enum ieee80211_pub_actioncode {
	WLAN_PUB_ACTION_EXT_CHANSW_ANN = 4,
	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,
};

/* Interworking capabilities are set in 7th bit of 4th byte of the
 * @WLAN_EID_EXT_CAPABILITY information element
 */
#define WLAN_EXT_CAPA4_INTERWORKING_ENABLED	BIT(7)

/*
 * 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)

#define WLAN_EXT_CAPA8_OPMODE_NOTIF	BIT(6)

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

/**
 * enum - mesh synchronization method identifier
 *
 * @IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET: the default synchronization method
 * @IEEE80211_SYNC_METHOD_VENDOR: a vendor specific synchronization method
 *	that will be specified in a vendor specific information element
 */
enum {
	IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET = 1,
	IEEE80211_SYNC_METHOD_VENDOR = 255,
};

/**
 * 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 = 1,
	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 = 1,
	IEEE80211_PATH_METRIC_VENDOR = 255,
};

/**
 * enum ieee80211_root_mode_identifier - root mesh STA mode identifier
 *
 * These attribute are used by dot11MeshHWMPRootMode to set root mesh STA mode
 *
 * @IEEE80211_ROOTMODE_NO_ROOT: the mesh STA is not a root mesh STA (default)
 * @IEEE80211_ROOTMODE_ROOT: the mesh STA is a root mesh STA if greater than
 *	this value
 * @IEEE80211_PROACTIVE_PREQ_NO_PREP: the mesh STA is a root mesh STA supports
 *	the proactive PREQ with proactive PREP subfield set to 0
 * @IEEE80211_PROACTIVE_PREQ_WITH_PREP: the mesh STA is a root mesh STA
 *	supports the proactive PREQ with proactive PREP subfield set to 1
 * @IEEE80211_PROACTIVE_RANN: the mesh STA is a root mesh STA supports
 *	the proactive RANN
 */
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;
		} __packed chans;
		struct {
			u8 reg_extension_id;
			u8 reg_class;
			u8 coverage_class;
		} __packed ext;
	};
} __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 */,
};

/**
 * struct ieee80211_timeout_interval_ie - Timeout Interval element
 * @type: type, see &enum ieee80211_timeout_interval_type
 * @value: timeout interval value
 */
struct ieee80211_timeout_interval_ie {
	u8 type;
	__le32 value;
} __packed;

/* 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_8021X_SHA256	0x000FAC05
#define WLAN_AKM_SUITE_PSK_SHA256	0x000FAC06
#define WLAN_AKM_SUITE_TDLS		0x000FAC07
#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;

/**
 * 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_is_public_action - check if frame is a public action frame
 * @hdr: the frame
 * @len: length of the frame
 */
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;
}

/**
 * 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;
}

/**
 * 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(const 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);
}

/* convert time units */
#define TU_TO_JIFFIES(x)	(usecs_to_jiffies((x) * 1024))
#define TU_TO_EXP_TIME(x)	(jiffies + TU_TO_JIFFIES(x))

#endif /* LINUX_IEEE80211_H */