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- /*-
- * Copyright (c) 2003, 2004 David Young. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of David Young may not be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID
- * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
- * OF SUCH DAMAGE.
- *
- * $Id: ieee80211_radiotap.h 1484 2006-03-23 23:02:54Z jbicket $
- */
- #ifndef _NET_IF_IEEE80211RADIOTAP_H_
- #define _NET_IF_IEEE80211RADIOTAP_H_
-
- /* A generic radio capture format is desirable. There is one for
- * Linux, but it is neither rigidly defined (there were not even
- * units given for some fields) nor easily extensible.
- *
- * I suggest the following extensible radio capture format. It is
- * based on a bitmap indicating which fields are present.
- *
- * I am trying to describe precisely what the application programmer
- * should expect in the following, and for that reason I tell the
- * units and origin of each measurement (where it applies), or else I
- * use sufficiently weaselly language ("is a monotonically nondecreasing
- * function of...") that I cannot set false expectations for lawyerly
- * readers.
- */
- #if defined(__KERNEL__) || defined(_KERNEL)
- #ifndef DLT_IEEE802_11_RADIO
- #define DLT_IEEE802_11_RADIO 127 /* 802.11 plus WLAN header */
- #endif
- #endif /* defined(__KERNEL__) || defined(_KERNEL) */
-
- /* The radio capture header precedes the 802.11 header. */
- struct ieee80211_radiotap_header {
- u_int8_t it_version; /* Version 0. Only increases
- * for drastic changes,
- * introduction of compatible
- * new fields does not count.
- */
- u_int8_t it_pad;
- u_int16_t it_len; /* length of the whole
- * header in bytes, including
- * it_version, it_pad,
- * it_len, and data fields.
- */
- u_int32_t it_present; /* A bitmap telling which
- * fields are present. Set bit 31
- * (0x80000000) to extend the
- * bitmap by another 32 bits.
- * Additional extensions are made
- * by setting bit 31.
- */
- } __attribute__((__packed__));
-
- /* Name Data type Units
- * ---- --------- -----
- *
- * IEEE80211_RADIOTAP_TSFT u_int64_t microseconds
- *
- * Value in microseconds of the MAC's 64-bit 802.11 Time
- * Synchronization Function timer when the first bit of the
- * MPDU arrived at the MAC. For received frames, only.
- *
- * IEEE80211_RADIOTAP_CHANNEL 2 x u_int16_t MHz, bitmap
- *
- * Tx/Rx frequency in MHz, followed by flags (see below).
- *
- * IEEE80211_RADIOTAP_FHSS u_int16_t see below
- *
- * For frequency-hopping radios, the hop set (first byte)
- * and pattern (second byte).
- *
- * IEEE80211_RADIOTAP_RATE u_int8_t 500kb/s
- *
- * Tx/Rx data rate
- *
- * IEEE80211_RADIOTAP_DBM_ANTSIGNAL int8_t decibels from
- * one milliwatt (dBm)
- *
- * RF signal power at the antenna, decibel difference from
- * one milliwatt.
- *
- * IEEE80211_RADIOTAP_DBM_ANTNOISE int8_t decibels from
- * one milliwatt (dBm)
- *
- * RF noise power at the antenna, decibel difference from one
- * milliwatt.
- *
- * IEEE80211_RADIOTAP_DB_ANTSIGNAL u_int8_t decibel (dB)
- *
- * RF signal power at the antenna, decibel difference from an
- * arbitrary, fixed reference.
- *
- * IEEE80211_RADIOTAP_DB_ANTNOISE u_int8_t decibel (dB)
- *
- * RF noise power at the antenna, decibel difference from an
- * arbitrary, fixed reference point.
- *
- * IEEE80211_RADIOTAP_BARKER_CODE_LOCK u_int16_t unitless
- *
- * Quality of Barker code lock. Unitless. Monotonically
- * nondecreasing with "better" lock strength. Called "Signal
- * Quality" in datasheets. (Is there a standard way to measure
- * this?)
- *
- * IEEE80211_RADIOTAP_TX_ATTENUATION u_int16_t unitless
- *
- * Transmit power expressed as unitless distance from max
- * power set at factory calibration. 0 is max power.
- * Monotonically nondecreasing with lower power levels.
- *
- * IEEE80211_RADIOTAP_DB_TX_ATTENUATION u_int16_t decibels (dB)
- *
- * Transmit power expressed as decibel distance from max power
- * set at factory calibration. 0 is max power. Monotonically
- * nondecreasing with lower power levels.
- *
- * IEEE80211_RADIOTAP_DBM_TX_POWER int8_t decibels from
- * one milliwatt (dBm)
- *
- * Transmit power expressed as dBm (decibels from a 1 milliwatt
- * reference). This is the absolute power level measured at
- * the antenna port.
- *
- * IEEE80211_RADIOTAP_FLAGS u_int8_t bitmap
- *
- * Properties of transmitted and received frames. See flags
- * defined below.
- *
- * IEEE80211_RADIOTAP_ANTENNA u_int8_t antenna index
- *
- * Unitless indication of the Rx/Tx antenna for this packet.
- * The first antenna is antenna 0.
- *
- * IEEE80211_RADIOTAP_FCS u_int32_t data
- *
- * FCS from frame in network byte order.
- */
- enum ieee80211_radiotap_type {
- 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_FCS = 14,
- IEEE80211_RADIOTAP_EXT = 31,
- };
-
- #ifndef _KERNEL
- /* Channel flags. */
- #define IEEE80211_CHAN_TURBO 0x0010 /* Turbo channel */
- #define IEEE80211_CHAN_CCK 0x0020 /* CCK channel */
- #define IEEE80211_CHAN_OFDM 0x0040 /* OFDM channel */
- #define IEEE80211_CHAN_2GHZ 0x0080 /* 2 GHz spectrum channel. */
- #define IEEE80211_CHAN_5GHZ 0x0100 /* 5 GHz spectrum channel */
- #define IEEE80211_CHAN_PASSIVE 0x0200 /* Only passive scan allowed */
- #define IEEE80211_CHAN_DYN 0x0400 /* Dynamic CCK-OFDM channel */
- #define IEEE80211_CHAN_GFSK 0x0800 /* GFSK channel (FHSS PHY) */
- #define IEEE80211_CHAN_STURBO 0x2000 /* 11a static turbo channel only */
-
- /* Useful combinations of channel characteristics, borrowed from Ethereal */
- #define IEEE80211_CHAN_A \
- (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM)
- #define IEEE80211_CHAN_B \
- (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_CCK)
- #define IEEE80211_CHAN_G \
- (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN)
- #define IEEE80211_CHAN_TA \
- (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM | IEEE80211_CHAN_TURBO)
- #define IEEE80211_CHAN_TG \
- (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN | IEEE80211_CHAN_TURBO)
-
- #endif /* !_KERNEL */
-
- /* For IEEE80211_RADIOTAP_FLAGS */
- #define IEEE80211_RADIOTAP_F_CFP 0x01 /* sent/received
- * during CFP
- */
- #define IEEE80211_RADIOTAP_F_SHORTPRE 0x02 /* sent/received
- * with short
- * preamble
- */
- #define IEEE80211_RADIOTAP_F_WEP 0x04 /* sent/received
- * with WEP encryption
- */
- #define IEEE80211_RADIOTAP_F_FRAG 0x08 /* sent/received
- * with fragmentation
- */
-
- #endif /* _NET_IF_IEEE80211RADIOTAP_H_ */
-