| /* |
| * 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. |
| */ |
| |
| /* |
| * Modifications to fit into the linux IEEE 802.11 stack, |
| * Mike Kershaw (dragorn@kismetwireless.net) |
| */ |
| |
| #ifndef IEEE80211RADIOTAP_H |
| #define IEEE80211RADIOTAP_H |
| |
| #include <linux/if_ether.h> |
| #include <linux/kernel.h> |
| #include <asm/unaligned.h> |
| |
| /* Base version of the radiotap packet header data */ |
| #define PKTHDR_RADIOTAP_VERSION 0 |
| |
| /* 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. |
| */ |
| |
| /* |
| * The radio capture header precedes the 802.11 header. |
| * All data in the header is little endian on all platforms. |
| */ |
| struct ieee80211_radiotap_header { |
| u8 it_version; /* Version 0. Only increases |
| * for drastic changes, |
| * introduction of compatible |
| * new fields does not count. |
| */ |
| u8 it_pad; |
| __le16 it_len; /* length of the whole |
| * header in bytes, including |
| * it_version, it_pad, |
| * it_len, and data fields. |
| */ |
| __le32 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. |
| */ |
| } __packed; |
| |
| /* Name Data type Units |
| * ---- --------- ----- |
| * |
| * IEEE80211_RADIOTAP_TSFT __le64 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 __le16 MHz, bitmap |
| * |
| * Tx/Rx frequency in MHz, followed by flags (see below). |
| * |
| * IEEE80211_RADIOTAP_FHSS __le16 see below |
| * |
| * For frequency-hopping radios, the hop set (first byte) |
| * and pattern (second byte). |
| * |
| * IEEE80211_RADIOTAP_RATE u8 500kb/s |
| * |
| * Tx/Rx data rate |
| * |
| * IEEE80211_RADIOTAP_DBM_ANTSIGNAL s8 decibels from |
| * one milliwatt (dBm) |
| * |
| * RF signal power at the antenna, decibel difference from |
| * one milliwatt. |
| * |
| * IEEE80211_RADIOTAP_DBM_ANTNOISE s8 decibels from |
| * one milliwatt (dBm) |
| * |
| * RF noise power at the antenna, decibel difference from one |
| * milliwatt. |
| * |
| * IEEE80211_RADIOTAP_DB_ANTSIGNAL u8 decibel (dB) |
| * |
| * RF signal power at the antenna, decibel difference from an |
| * arbitrary, fixed reference. |
| * |
| * IEEE80211_RADIOTAP_DB_ANTNOISE u8 decibel (dB) |
| * |
| * RF noise power at the antenna, decibel difference from an |
| * arbitrary, fixed reference point. |
| * |
| * IEEE80211_RADIOTAP_LOCK_QUALITY __le16 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 __le16 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 __le16 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 s8 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 u8 bitmap |
| * |
| * Properties of transmitted and received frames. See flags |
| * defined below. |
| * |
| * IEEE80211_RADIOTAP_ANTENNA u8 antenna index |
| * |
| * Unitless indication of the Rx/Tx antenna for this packet. |
| * The first antenna is antenna 0. |
| * |
| * IEEE80211_RADIOTAP_RX_FLAGS __le16 bitmap |
| * |
| * Properties of received frames. See flags defined below. |
| * |
| * IEEE80211_RADIOTAP_TX_FLAGS __le16 bitmap |
| * |
| * Properties of transmitted frames. See flags defined below. |
| * |
| * IEEE80211_RADIOTAP_RTS_RETRIES u8 data |
| * |
| * Number of rts retries a transmitted frame used. |
| * |
| * IEEE80211_RADIOTAP_DATA_RETRIES u8 data |
| * |
| * Number of unicast retries a transmitted frame used. |
| * |
| * IEEE80211_RADIOTAP_MCS u8, u8, u8 unitless |
| * |
| * Contains a bitmap of known fields/flags, the flags, and |
| * the MCS index. |
| * |
| */ |
| 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_RX_FLAGS = 14, |
| IEEE80211_RADIOTAP_TX_FLAGS = 15, |
| IEEE80211_RADIOTAP_RTS_RETRIES = 16, |
| IEEE80211_RADIOTAP_DATA_RETRIES = 17, |
| |
| IEEE80211_RADIOTAP_MCS = 19, |
| |
| /* valid in every it_present bitmap, even vendor namespaces */ |
| IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE = 29, |
| IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30, |
| IEEE80211_RADIOTAP_EXT = 31 |
| }; |
| |
| /* 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) */ |
| |
| /* 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 /* bad FCS */ |
| |
| /* For IEEE80211_RADIOTAP_RX_FLAGS */ |
| #define IEEE80211_RADIOTAP_F_RX_BADPLCP 0x0002 /* frame has bad PLCP */ |
| |
| /* For IEEE80211_RADIOTAP_TX_FLAGS */ |
| #define IEEE80211_RADIOTAP_F_TX_FAIL 0x0001 /* failed due to excessive |
| * retries */ |
| #define IEEE80211_RADIOTAP_F_TX_CTS 0x0002 /* used cts 'protection' */ |
| #define IEEE80211_RADIOTAP_F_TX_RTS 0x0004 /* used rts/cts handshake */ |
| #define IEEE80211_RADIOTAP_F_TX_NOACK 0x0008 /* don't expect an ack */ |
| |
| |
| /* For IEEE80211_RADIOTAP_MCS */ |
| #define IEEE80211_RADIOTAP_MCS_HAVE_BW 0x01 |
| #define IEEE80211_RADIOTAP_MCS_HAVE_MCS 0x02 |
| #define IEEE80211_RADIOTAP_MCS_HAVE_GI 0x04 |
| #define IEEE80211_RADIOTAP_MCS_HAVE_FMT 0x08 |
| #define IEEE80211_RADIOTAP_MCS_HAVE_FEC 0x10 |
| |
| #define IEEE80211_RADIOTAP_MCS_BW_MASK 0x03 |
| #define IEEE80211_RADIOTAP_MCS_BW_20 0 |
| #define IEEE80211_RADIOTAP_MCS_BW_40 1 |
| #define IEEE80211_RADIOTAP_MCS_BW_20L 2 |
| #define IEEE80211_RADIOTAP_MCS_BW_20U 3 |
| #define IEEE80211_RADIOTAP_MCS_SGI 0x04 |
| #define IEEE80211_RADIOTAP_MCS_FMT_GF 0x08 |
| #define IEEE80211_RADIOTAP_MCS_FEC_LDPC 0x10 |
| |
| |
| /* Ugly macro to convert literal channel numbers into their mhz equivalents |
| * There are certianly some conditions that will break this (like feeding it '30') |
| * but they shouldn't arise since nothing talks on channel 30. */ |
| #define ieee80211chan2mhz(x) \ |
| (((x) <= 14) ? \ |
| (((x) == 14) ? 2484 : ((x) * 5) + 2407) : \ |
| ((x) + 1000) * 5) |
| |
| /* helpers */ |
| static inline int ieee80211_get_radiotap_len(unsigned char *data) |
| { |
| struct ieee80211_radiotap_header *hdr = |
| (struct ieee80211_radiotap_header *)data; |
| |
| return get_unaligned_le16(&hdr->it_len); |
| } |
| |
| #endif /* IEEE80211_RADIOTAP_H */ |
