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Diffstat (limited to 'contrib/tcpdump/ieee802_11_radio.h')
| -rw-r--r-- | contrib/tcpdump/ieee802_11_radio.h | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/contrib/tcpdump/ieee802_11_radio.h b/contrib/tcpdump/ieee802_11_radio.h new file mode 100644 index 0000000..472a0d9 --- /dev/null +++ b/contrib/tcpdump/ieee802_11_radio.h @@ -0,0 +1,240 @@ +/* $FreeBSD$ */ +/* $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. + * 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. + */ +#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. + * + * 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. + */ +} __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). + * 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. + * + * 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_XCHANNEL = 18, + IEEE80211_RADIOTAP_EXT = 31 +}; + +#ifndef _KERNEL +/* Channel flags; some are used only with XCHANNEL */ +#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 */ +#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 + */ +#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 */ + +#endif /* _NET_IF_IEEE80211RADIOTAP_H_ */ |
