radiotap.h
Go to the documentation of this file.
00001 /* $FreeBSD: src/sys/net80211/ieee80211_radiotap.h,v 1.5 2005/01/22 20:12:05 sam Exp $ */
00002 /* $NetBSD: ieee80211_radiotap.h,v 1.11 2005/06/22 06:16:02 dyoung Exp $ */
00003 
00004 /*-
00005  * Copyright (c) 2003, 2004 David Young.  All rights reserved.
00006  *
00007  * Redistribution and use in source and binary forms, with or without
00008  * modification, are permitted provided that the following conditions
00009  * are met:
00010  * 1. Redistributions of source code must retain the above copyright
00011  *    notice, this list of conditions and the following disclaimer.
00012  * 2. Redistributions in binary form must reproduce the above copyright
00013  *    notice, this list of conditions and the following disclaimer in the
00014  *    documentation and/or other materials provided with the distribution.
00015  * 3. The name of David Young may not be used to endorse or promote
00016  *    products derived from this software without specific prior
00017  *    written permission.
00018  *
00019  * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY
00020  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
00021  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00022  * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL DAVID
00023  * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00024  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00025  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00026  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
00027  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00028  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00029  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
00030  * OF SUCH DAMAGE.
00031  */
00032 
00033 /*
00034  * Modifications to fit into the linux IEEE 802.11 stack,
00035  * Mike Kershaw (dragorn@kismetwireless.net)
00036  */
00037 
00038 #ifndef IEEE80211RADIOTAP_H
00039 #define IEEE80211RADIOTAP_H
00040 
00041 #include <stdint.h>
00042 
00043 /* Base version of the radiotap packet header data */
00044 #define PKTHDR_RADIOTAP_VERSION         0
00045 
00046 /* A generic radio capture format is desirable. There is one for
00047  * Linux, but it is neither rigidly defined (there were not even
00048  * units given for some fields) nor easily extensible.
00049  *
00050  * I suggest the following extensible radio capture format. It is
00051  * based on a bitmap indicating which fields are present.
00052  *
00053  * I am trying to describe precisely what the application programmer
00054  * should expect in the following, and for that reason I tell the
00055  * units and origin of each measurement (where it applies), or else I
00056  * use sufficiently weaselly language ("is a monotonically nondecreasing
00057  * function of...") that I cannot set false expectations for lawyerly
00058  * readers.
00059  */
00060 
00061 /* The radio capture header precedes the 802.11 header.
00062  * All data in the header is little endian on all platforms.
00063  */
00064 struct ieee80211_radiotap_header {
00065         uint8_t it_version;     /* Version 0. Only increases
00066                                  * for drastic changes,
00067                                  * introduction of compatible
00068                                  * new fields does not count.
00069                                  */
00070         uint8_t it_pad;
00071         uint16_t it_len;        /* length of the whole
00072                                  * header in bytes, including
00073                                  * it_version, it_pad,
00074                                  * it_len, and data fields.
00075                                  */
00076         uint32_t it_present;    /* A bitmap telling which
00077                                  * fields are present. Set bit 31
00078                                  * (0x80000000) to extend the
00079                                  * bitmap by another 32 bits.
00080                                  * Additional extensions are made
00081                                  * by setting bit 31.
00082                                  */
00083 };
00084 
00085 /* Name                                 Data type    Units
00086  * ----                                 ---------    -----
00087  *
00088  * IEEE80211_RADIOTAP_TSFT              __le64       microseconds
00089  *
00090  *      Value in microseconds of the MAC's 64-bit 802.11 Time
00091  *      Synchronization Function timer when the first bit of the
00092  *      MPDU arrived at the MAC. For received frames, only.
00093  *
00094  * IEEE80211_RADIOTAP_CHANNEL           2 x uint16_t   MHz, bitmap
00095  *
00096  *      Tx/Rx frequency in MHz, followed by flags (see below).
00097  *
00098  * IEEE80211_RADIOTAP_FHSS              uint16_t       see below
00099  *
00100  *      For frequency-hopping radios, the hop set (first byte)
00101  *      and pattern (second byte).
00102  *
00103  * IEEE80211_RADIOTAP_RATE              u8           500kb/s
00104  *
00105  *      Tx/Rx data rate
00106  *
00107  * IEEE80211_RADIOTAP_DBM_ANTSIGNAL     s8           decibels from
00108  *                                                   one milliwatt (dBm)
00109  *
00110  *      RF signal power at the antenna, decibel difference from
00111  *      one milliwatt.
00112  *
00113  * IEEE80211_RADIOTAP_DBM_ANTNOISE      s8           decibels from
00114  *                                                   one milliwatt (dBm)
00115  *
00116  *      RF noise power at the antenna, decibel difference from one
00117  *      milliwatt.
00118  *
00119  * IEEE80211_RADIOTAP_DB_ANTSIGNAL      u8           decibel (dB)
00120  *
00121  *      RF signal power at the antenna, decibel difference from an
00122  *      arbitrary, fixed reference.
00123  *
00124  * IEEE80211_RADIOTAP_DB_ANTNOISE       u8           decibel (dB)
00125  *
00126  *      RF noise power at the antenna, decibel difference from an
00127  *      arbitrary, fixed reference point.
00128  *
00129  * IEEE80211_RADIOTAP_LOCK_QUALITY      uint16_t       unitless
00130  *
00131  *      Quality of Barker code lock. Unitless. Monotonically
00132  *      nondecreasing with "better" lock strength. Called "Signal
00133  *      Quality" in datasheets.  (Is there a standard way to measure
00134  *      this?)
00135  *
00136  * IEEE80211_RADIOTAP_TX_ATTENUATION    uint16_t       unitless
00137  *
00138  *      Transmit power expressed as unitless distance from max
00139  *      power set at factory calibration.  0 is max power.
00140  *      Monotonically nondecreasing with lower power levels.
00141  *
00142  * IEEE80211_RADIOTAP_DB_TX_ATTENUATION uint16_t       decibels (dB)
00143  *
00144  *      Transmit power expressed as decibel distance from max power
00145  *      set at factory calibration.  0 is max power.  Monotonically
00146  *      nondecreasing with lower power levels.
00147  *
00148  * IEEE80211_RADIOTAP_DBM_TX_POWER      s8           decibels from
00149  *                                                   one milliwatt (dBm)
00150  *
00151  *      Transmit power expressed as dBm (decibels from a 1 milliwatt
00152  *      reference). This is the absolute power level measured at
00153  *      the antenna port.
00154  *
00155  * IEEE80211_RADIOTAP_FLAGS             u8           bitmap
00156  *
00157  *      Properties of transmitted and received frames. See flags
00158  *      defined below.
00159  *
00160  * IEEE80211_RADIOTAP_ANTENNA           u8           antenna index
00161  *
00162  *      Unitless indication of the Rx/Tx antenna for this packet.
00163  *      The first antenna is antenna 0.
00164  *
00165  * IEEE80211_RADIOTAP_RX_FLAGS          uint16_t       bitmap
00166  *
00167  *     Properties of received frames. See flags defined below.
00168  *
00169  * IEEE80211_RADIOTAP_TX_FLAGS          uint16_t       bitmap
00170  *
00171  *     Properties of transmitted frames. See flags defined below.
00172  *
00173  * IEEE80211_RADIOTAP_RTS_RETRIES       u8           data
00174  *
00175  *     Number of rts retries a transmitted frame used.
00176  *
00177  * IEEE80211_RADIOTAP_DATA_RETRIES      u8           data
00178  *
00179  *     Number of unicast retries a transmitted frame used.
00180  *
00181  */
00182 enum ieee80211_radiotap_type {
00183         IEEE80211_RADIOTAP_TSFT = 0,
00184         IEEE80211_RADIOTAP_FLAGS = 1,
00185         IEEE80211_RADIOTAP_RATE = 2,
00186         IEEE80211_RADIOTAP_CHANNEL = 3,
00187         IEEE80211_RADIOTAP_FHSS = 4,
00188         IEEE80211_RADIOTAP_DBM_ANTSIGNAL = 5,
00189         IEEE80211_RADIOTAP_DBM_ANTNOISE = 6,
00190         IEEE80211_RADIOTAP_LOCK_QUALITY = 7,
00191         IEEE80211_RADIOTAP_TX_ATTENUATION = 8,
00192         IEEE80211_RADIOTAP_DB_TX_ATTENUATION = 9,
00193         IEEE80211_RADIOTAP_DBM_TX_POWER = 10,
00194         IEEE80211_RADIOTAP_ANTENNA = 11,
00195         IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12,
00196         IEEE80211_RADIOTAP_DB_ANTNOISE = 13,
00197         IEEE80211_RADIOTAP_RX_FLAGS = 14,
00198         IEEE80211_RADIOTAP_TX_FLAGS = 15,
00199         IEEE80211_RADIOTAP_RTS_RETRIES = 16,
00200         IEEE80211_RADIOTAP_DATA_RETRIES = 17,
00201         IEEE80211_RADIOTAP_EXT = 31
00202 };
00203 
00204 /* Channel flags. */
00205 #define IEEE80211_CHAN_TURBO    0x0010  /* Turbo channel */
00206 #define IEEE80211_CHAN_CCK      0x0020  /* CCK channel */
00207 #define IEEE80211_CHAN_OFDM     0x0040  /* OFDM channel */
00208 #define IEEE80211_CHAN_2GHZ     0x0080  /* 2 GHz spectrum channel. */
00209 #define IEEE80211_CHAN_5GHZ     0x0100  /* 5 GHz spectrum channel */
00210 #define IEEE80211_CHAN_PASSIVE  0x0200  /* Only passive scan allowed */
00211 #define IEEE80211_CHAN_DYN      0x0400  /* Dynamic CCK-OFDM channel */
00212 #define IEEE80211_CHAN_GFSK     0x0800  /* GFSK channel (FHSS PHY) */
00213 
00214 /* For IEEE80211_RADIOTAP_FLAGS */
00215 #define IEEE80211_RADIOTAP_F_CFP        0x01    /* sent/received
00216                                                  * during CFP
00217                                                  */
00218 #define IEEE80211_RADIOTAP_F_SHORTPRE   0x02    /* sent/received
00219                                                  * with short
00220                                                  * preamble
00221                                                  */
00222 #define IEEE80211_RADIOTAP_F_WEP        0x04    /* sent/received
00223                                                  * with WEP encryption
00224                                                  */
00225 #define IEEE80211_RADIOTAP_F_FRAG       0x08    /* sent/received
00226                                                  * with fragmentation
00227                                                  */
00228 #define IEEE80211_RADIOTAP_F_FCS        0x10    /* frame includes FCS */
00229 #define IEEE80211_RADIOTAP_F_DATAPAD    0x20    /* frame has padding between
00230                                                  * 802.11 header and payload
00231                                                  * (to 32-bit boundary)
00232                                                  */
00233 /* For IEEE80211_RADIOTAP_RX_FLAGS */
00234 #define IEEE80211_RADIOTAP_F_RX_BADFCS  0x0001  /* frame failed crc check */
00235 
00236 /* For IEEE80211_RADIOTAP_TX_FLAGS */
00237 #define IEEE80211_RADIOTAP_F_TX_FAIL    0x0001  /* failed due to excessive
00238                                                  * retries */
00239 #define IEEE80211_RADIOTAP_F_TX_CTS     0x0002  /* used cts 'protection' */
00240 #define IEEE80211_RADIOTAP_F_TX_RTS     0x0004  /* used rts/cts handshake */
00241 
00242 #endif                          /* IEEE80211_RADIOTAP_H */


wpa_supplicant_node
Author(s): Package maintained by Blaise Gassend
autogenerated on Thu Apr 24 2014 15:33:21