/*

   * Copyright (c) 2017		Intel Deutschland GmbH
   *
   * Permission to use, copy, modify, and/or distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

   */

  #ifndef __RADIOTAP_H
  #define __RADIOTAP_H

  #include <linux/kernel.h>

  #include <asm/unaligned.h>

  /**
   * struct ieee82011_radiotap_header - base radiotap header

   */

  struct ieee80211_radiotap_header {

  	/**
  	 * @it_version: radiotap version, always 0
  	 */
  	uint8_t it_version;
  
  	/**
  	 * @it_pad: padding (or alignment)
  	 */
  	uint8_t it_pad;
  
  	/**
  	 * @it_len: overall radiotap header length
  	 */
  	__le16 it_len;
  
  	/**
  	 * @it_present: (first) present word
  	 */
  	__le32 it_present;

  } __packed;

  /* version is always 0 */
  #define PKTHDR_RADIOTAP_VERSION	0
  
  /* see the radiotap website for the descriptions */
  enum ieee80211_radiotap_presence {

  	IEEE80211_RADIOTAP_TSFT = 0,
  	IEEE80211_RADIOTAP_FLAGS = 1,
  	IEEE80211_RADIOTAP_RATE = 2,
  	IEEE80211_RADIOTAP_CHANNEL = 3,
  	IEEE80211_RADIOTAP_FHSS = 4,
  	IEEE80211_RADIOTAP_DBM_ANTSIGNAL = 5,
  	IEEE80211_RADIOTAP_DBM_ANTNOISE = 6,
  	IEEE80211_RADIOTAP_LOCK_QUALITY = 7,
  	IEEE80211_RADIOTAP_TX_ATTENUATION = 8,
  	IEEE80211_RADIOTAP_DB_TX_ATTENUATION = 9,
  	IEEE80211_RADIOTAP_DBM_TX_POWER = 10,
  	IEEE80211_RADIOTAP_ANTENNA = 11,
  	IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12,
  	IEEE80211_RADIOTAP_DB_ANTNOISE = 13,

  	IEEE80211_RADIOTAP_RX_FLAGS = 14,
  	IEEE80211_RADIOTAP_TX_FLAGS = 15,
  	IEEE80211_RADIOTAP_RTS_RETRIES = 16,
  	IEEE80211_RADIOTAP_DATA_RETRIES = 17,

  	/* 18 is XChannel, but it's not defined yet */

  	IEEE80211_RADIOTAP_MCS = 19,

  	IEEE80211_RADIOTAP_AMPDU_STATUS = 20,

  	IEEE80211_RADIOTAP_VHT = 21,

  	IEEE80211_RADIOTAP_TIMESTAMP = 22,

  	/* valid in every it_present bitmap, even vendor namespaces */
  	IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE = 29,
  	IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30,

  	IEEE80211_RADIOTAP_EXT = 31

  };

  /* for IEEE80211_RADIOTAP_FLAGS */
  enum ieee80211_radiotap_flags {
  	IEEE80211_RADIOTAP_F_CFP = 0x01,
  	IEEE80211_RADIOTAP_F_SHORTPRE = 0x02,
  	IEEE80211_RADIOTAP_F_WEP = 0x04,
  	IEEE80211_RADIOTAP_F_FRAG = 0x08,
  	IEEE80211_RADIOTAP_F_FCS = 0x10,
  	IEEE80211_RADIOTAP_F_DATAPAD = 0x20,
  	IEEE80211_RADIOTAP_F_BADFCS = 0x40,
  };

  /* for IEEE80211_RADIOTAP_CHANNEL */
  enum ieee80211_radiotap_channel_flags {
  	IEEE80211_CHAN_CCK = 0x0020,
  	IEEE80211_CHAN_OFDM = 0x0040,
  	IEEE80211_CHAN_2GHZ = 0x0080,
  	IEEE80211_CHAN_5GHZ = 0x0100,
  	IEEE80211_CHAN_DYN = 0x0400,
  	IEEE80211_CHAN_HALF = 0x4000,
  	IEEE80211_CHAN_QUARTER = 0x8000,
  };

  /* for IEEE80211_RADIOTAP_RX_FLAGS */
  enum ieee80211_radiotap_rx_flags {
  	IEEE80211_RADIOTAP_F_RX_BADPLCP = 0x0002,
  };

  /* for IEEE80211_RADIOTAP_TX_FLAGS */
  enum ieee80211_radiotap_tx_flags {
  	IEEE80211_RADIOTAP_F_TX_FAIL = 0x0001,
  	IEEE80211_RADIOTAP_F_TX_CTS = 0x0002,
  	IEEE80211_RADIOTAP_F_TX_RTS = 0x0004,
  	IEEE80211_RADIOTAP_F_TX_NOACK = 0x0008,
  };

  /* for IEEE80211_RADIOTAP_MCS "have" flags */
  enum ieee80211_radiotap_mcs_have {
  	IEEE80211_RADIOTAP_MCS_HAVE_BW = 0x01,
  	IEEE80211_RADIOTAP_MCS_HAVE_MCS = 0x02,
  	IEEE80211_RADIOTAP_MCS_HAVE_GI = 0x04,
  	IEEE80211_RADIOTAP_MCS_HAVE_FMT = 0x08,
  	IEEE80211_RADIOTAP_MCS_HAVE_FEC = 0x10,
  	IEEE80211_RADIOTAP_MCS_HAVE_STBC = 0x20,
  };

  enum ieee80211_radiotap_mcs_flags {
  	IEEE80211_RADIOTAP_MCS_BW_MASK = 0x03,
  	IEEE80211_RADIOTAP_MCS_BW_20 = 0,
  	IEEE80211_RADIOTAP_MCS_BW_40 = 1,
  	IEEE80211_RADIOTAP_MCS_BW_20L = 2,
  	IEEE80211_RADIOTAP_MCS_BW_20U = 3,
  
  	IEEE80211_RADIOTAP_MCS_SGI = 0x04,
  	IEEE80211_RADIOTAP_MCS_FMT_GF = 0x08,
  	IEEE80211_RADIOTAP_MCS_FEC_LDPC = 0x10,
  	IEEE80211_RADIOTAP_MCS_STBC_MASK = 0x60,
  	IEEE80211_RADIOTAP_MCS_STBC_1 = 1,
  	IEEE80211_RADIOTAP_MCS_STBC_2 = 2,
  	IEEE80211_RADIOTAP_MCS_STBC_3 = 3,
  	IEEE80211_RADIOTAP_MCS_STBC_SHIFT = 5,
  };

  /* for IEEE80211_RADIOTAP_AMPDU_STATUS */
  enum ieee80211_radiotap_ampdu_flags {
  	IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN = 0x0001,
  	IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN = 0x0002,
  	IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN = 0x0004,
  	IEEE80211_RADIOTAP_AMPDU_IS_LAST = 0x0008,
  	IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR = 0x0010,
  	IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN = 0x0020,
  };

  /* for IEEE80211_RADIOTAP_VHT */
  enum ieee80211_radiotap_vht_known {
  	IEEE80211_RADIOTAP_VHT_KNOWN_STBC = 0x0001,
  	IEEE80211_RADIOTAP_VHT_KNOWN_TXOP_PS_NA = 0x0002,
  	IEEE80211_RADIOTAP_VHT_KNOWN_GI = 0x0004,
  	IEEE80211_RADIOTAP_VHT_KNOWN_SGI_NSYM_DIS = 0x0008,
  	IEEE80211_RADIOTAP_VHT_KNOWN_LDPC_EXTRA_OFDM_SYM = 0x0010,
  	IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED = 0x0020,
  	IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH = 0x0040,
  	IEEE80211_RADIOTAP_VHT_KNOWN_GROUP_ID = 0x0080,
  	IEEE80211_RADIOTAP_VHT_KNOWN_PARTIAL_AID = 0x0100,
  };

  enum ieee80211_radiotap_vht_flags {
  	IEEE80211_RADIOTAP_VHT_FLAG_STBC = 0x01,
  	IEEE80211_RADIOTAP_VHT_FLAG_TXOP_PS_NA = 0x02,
  	IEEE80211_RADIOTAP_VHT_FLAG_SGI = 0x04,
  	IEEE80211_RADIOTAP_VHT_FLAG_SGI_NSYM_M10_9 = 0x08,
  	IEEE80211_RADIOTAP_VHT_FLAG_LDPC_EXTRA_OFDM_SYM = 0x10,
  	IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED = 0x20,
  };

  enum ieee80211_radiotap_vht_coding {
  	IEEE80211_RADIOTAP_CODING_LDPC_USER0 = 0x01,
  	IEEE80211_RADIOTAP_CODING_LDPC_USER1 = 0x02,
  	IEEE80211_RADIOTAP_CODING_LDPC_USER2 = 0x04,
  	IEEE80211_RADIOTAP_CODING_LDPC_USER3 = 0x08,
  };

  /* for IEEE80211_RADIOTAP_TIMESTAMP */
  enum ieee80211_radiotap_timestamp_unit_spos {
  	IEEE80211_RADIOTAP_TIMESTAMP_UNIT_MASK = 0x000F,
  	IEEE80211_RADIOTAP_TIMESTAMP_UNIT_MS = 0x0000,
  	IEEE80211_RADIOTAP_TIMESTAMP_UNIT_US = 0x0001,
  	IEEE80211_RADIOTAP_TIMESTAMP_UNIT_NS = 0x0003,
  	IEEE80211_RADIOTAP_TIMESTAMP_SPOS_MASK = 0x00F0,
  	IEEE80211_RADIOTAP_TIMESTAMP_SPOS_BEGIN_MDPU = 0x0000,
  	IEEE80211_RADIOTAP_TIMESTAMP_SPOS_PLCP_SIG_ACQ = 0x0010,
  	IEEE80211_RADIOTAP_TIMESTAMP_SPOS_EO_PPDU = 0x0020,
  	IEEE80211_RADIOTAP_TIMESTAMP_SPOS_EO_MPDU = 0x0030,
  	IEEE80211_RADIOTAP_TIMESTAMP_SPOS_UNKNOWN = 0x00F0,
  };

  enum ieee80211_radiotap_timestamp_flags {
  	IEEE80211_RADIOTAP_TIMESTAMP_FLAG_64BIT = 0x00,
  	IEEE80211_RADIOTAP_TIMESTAMP_FLAG_32BIT = 0x01,
  	IEEE80211_RADIOTAP_TIMESTAMP_FLAG_ACCURACY = 0x02,
  };

  /**
   * ieee80211_get_radiotap_len - get radiotap header length
   */
  static inline u16 ieee80211_get_radiotap_len(const char *data)

  {

  	struct ieee80211_radiotap_header *hdr = (void *)data;

  	return get_unaligned_le16(&hdr->it_len);

  }

  #endif /* __RADIOTAP_H */