229 lines
9.0 KiB
C
229 lines
9.0 KiB
C
/* $FreeBSD: src/sys/net80211/ieee80211_radiotap.h,v 1.5 2005/01/22 20:12:05 sam Exp $ */
|
|
/* NetBSD: ieee802_11_radio.h,v 1.2 2006/02/26 03:04:03 dyoung Exp */
|
|
/* Header: /tcpdump/master/tcpdump/ieee802_11_radio.h,v 1.3 2007-08-29 02:31:44 mcr Exp */
|
|
|
|
/*-
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
#ifndef _NET_IF_IEEE80211RADIOTAP_H_
|
|
#define _NET_IF_IEEE80211RADIOTAP_H_
|
|
|
|
/* A generic radio capture format is desirable. It must be
|
|
* rigidly defined (e.g., units for fields should be given),
|
|
* and easily extensible.
|
|
*
|
|
* The following is an 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.
|
|
*/
|
|
|
|
/*
|
|
* The radio capture header precedes the 802.11 header.
|
|
*
|
|
* Note well: all radiotap fields are little-endian.
|
|
*/
|
|
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.
|
|
*/
|
|
};
|
|
|
|
/* 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).
|
|
* Note that IEEE80211_RADIOTAP_XCHANNEL must be used to
|
|
* represent an HT channel as there is not enough room in
|
|
* the flags word.
|
|
*
|
|
* 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 or index
|
|
*
|
|
* Tx/Rx data rate. If bit 0x80 is set then it represents an
|
|
* an MCS index and not an IEEE 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_LOCK_QUALITY 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_XCHANNEL u_int32_t bitmap
|
|
* u_int16_t MHz
|
|
* u_int8_t channel number
|
|
* u_int8_t .5 dBm
|
|
*
|
|
* Extended channel specification: flags (see below) followed by
|
|
* frequency in MHz, the corresponding IEEE channel number, and
|
|
* finally the maximum regulatory transmit power cap in .5 dBm
|
|
* units. This property supersedes IEEE80211_RADIOTAP_CHANNEL
|
|
* and only one of the two should be present.
|
|
*/
|
|
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,
|
|
/* NB: gap for netbsd definitions */
|
|
IEEE80211_RADIOTAP_XCHANNEL = 18,
|
|
IEEE80211_RADIOTAP_EXT = 31
|
|
};
|
|
|
|
/* channel attributes */
|
|
#define IEEE80211_CHAN_TURBO 0x00010 /* Turbo channel */
|
|
#define IEEE80211_CHAN_CCK 0x00020 /* CCK channel */
|
|
#define IEEE80211_CHAN_OFDM 0x00040 /* OFDM channel */
|
|
#define IEEE80211_CHAN_2GHZ 0x00080 /* 2 GHz spectrum channel. */
|
|
#define IEEE80211_CHAN_5GHZ 0x00100 /* 5 GHz spectrum channel */
|
|
#define IEEE80211_CHAN_PASSIVE 0x00200 /* Only passive scan allowed */
|
|
#define IEEE80211_CHAN_DYN 0x00400 /* Dynamic CCK-OFDM channel */
|
|
#define IEEE80211_CHAN_GFSK 0x00800 /* GFSK channel (FHSS PHY) */
|
|
#define IEEE80211_CHAN_GSM 0x01000 /* 900 MHz spectrum channel */
|
|
#define IEEE80211_CHAN_STURBO 0x02000 /* 11a static turbo channel only */
|
|
#define IEEE80211_CHAN_HALF 0x04000 /* Half rate channel */
|
|
#define IEEE80211_CHAN_QUARTER 0x08000 /* Quarter rate channel */
|
|
#define IEEE80211_CHAN_HT20 0x10000 /* HT 20 channel */
|
|
#define IEEE80211_CHAN_HT40U 0x20000 /* HT 40 channel w/ ext above */
|
|
#define IEEE80211_CHAN_HT40D 0x40000 /* HT 40 channel w/ ext below */
|
|
|
|
/* 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
|
|
*/
|
|
#define IEEE80211_RADIOTAP_F_FCS 0x10 /* frame includes FCS */
|
|
#define IEEE80211_RADIOTAP_F_DATAPAD 0x20 /* frame has padding between
|
|
* 802.11 header and payload
|
|
* (to 32-bit boundary)
|
|
*/
|
|
#define IEEE80211_RADIOTAP_F_BADFCS 0x40 /* does not pass FCS check */
|
|
#define IEEE80211_RADIOTAP_F_SHORTGI 0x80 /* HT short GI */
|
|
|
|
#endif /* _NET_IF_IEEE80211RADIOTAP_H_ */
|