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354 lines
13 KiB
354 lines
13 KiB
/* |
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* Copyright (c) 2003, 2004 David Young. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of David Young may not be used to endorse or promote |
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* products derived from this software without specific prior |
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* written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID |
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* YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
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* OF SUCH DAMAGE. |
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*/ |
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/* |
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* Modifications to fit into the linux IEEE 802.11 stack, |
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* Mike Kershaw ([email protected]) |
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*/ |
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#ifndef IEEE80211RADIOTAP_H |
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#define IEEE80211RADIOTAP_H |
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#include <linux/if_ether.h> |
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#include <linux/kernel.h> |
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#include <asm/unaligned.h> |
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/* Base version of the radiotap packet header data */ |
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#define PKTHDR_RADIOTAP_VERSION 0 |
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/* A generic radio capture format is desirable. There is one for |
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* Linux, but it is neither rigidly defined (there were not even |
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* units given for some fields) nor easily extensible. |
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* |
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* I suggest the following extensible radio capture format. It is |
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* based on a bitmap indicating which fields are present. |
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* |
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* I am trying to describe precisely what the application programmer |
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* should expect in the following, and for that reason I tell the |
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* units and origin of each measurement (where it applies), or else I |
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* use sufficiently weaselly language ("is a monotonically nondecreasing |
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* function of...") that I cannot set false expectations for lawyerly |
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* readers. |
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*/ |
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/* |
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* The radio capture header precedes the 802.11 header. |
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* All data in the header is little endian on all platforms. |
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*/ |
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struct ieee80211_radiotap_header { |
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u8 it_version; /* Version 0. Only increases |
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* for drastic changes, |
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* introduction of compatible |
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* new fields does not count. |
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*/ |
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u8 it_pad; |
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__le16 it_len; /* length of the whole |
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* header in bytes, including |
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* it_version, it_pad, |
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* it_len, and data fields. |
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*/ |
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__le32 it_present; /* A bitmap telling which |
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* fields are present. Set bit 31 |
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* (0x80000000) to extend the |
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* bitmap by another 32 bits. |
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* Additional extensions are made |
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* by setting bit 31. |
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*/ |
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} __packed; |
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/* Name Data type Units |
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* ---- --------- ----- |
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* |
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* IEEE80211_RADIOTAP_TSFT __le64 microseconds |
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* |
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* Value in microseconds of the MAC's 64-bit 802.11 Time |
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* Synchronization Function timer when the first bit of the |
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* MPDU arrived at the MAC. For received frames, only. |
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* |
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* IEEE80211_RADIOTAP_CHANNEL 2 x __le16 MHz, bitmap |
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* |
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* Tx/Rx frequency in MHz, followed by flags (see below). |
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* |
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* IEEE80211_RADIOTAP_FHSS __le16 see below |
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* |
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* For frequency-hopping radios, the hop set (first byte) |
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* and pattern (second byte). |
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* |
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* IEEE80211_RADIOTAP_RATE u8 500kb/s |
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* |
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* Tx/Rx data rate |
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* |
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* IEEE80211_RADIOTAP_DBM_ANTSIGNAL s8 decibels from |
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* one milliwatt (dBm) |
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* |
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* RF signal power at the antenna, decibel difference from |
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* one milliwatt. |
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* |
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* IEEE80211_RADIOTAP_DBM_ANTNOISE s8 decibels from |
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* one milliwatt (dBm) |
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* |
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* RF noise power at the antenna, decibel difference from one |
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* milliwatt. |
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* |
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* IEEE80211_RADIOTAP_DB_ANTSIGNAL u8 decibel (dB) |
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* |
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* RF signal power at the antenna, decibel difference from an |
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* arbitrary, fixed reference. |
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* |
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* IEEE80211_RADIOTAP_DB_ANTNOISE u8 decibel (dB) |
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* |
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* RF noise power at the antenna, decibel difference from an |
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* arbitrary, fixed reference point. |
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* |
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* IEEE80211_RADIOTAP_LOCK_QUALITY __le16 unitless |
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* |
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* Quality of Barker code lock. Unitless. Monotonically |
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* nondecreasing with "better" lock strength. Called "Signal |
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* Quality" in datasheets. (Is there a standard way to measure |
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* this?) |
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* |
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* IEEE80211_RADIOTAP_TX_ATTENUATION __le16 unitless |
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* |
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* Transmit power expressed as unitless distance from max |
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* power set at factory calibration. 0 is max power. |
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* Monotonically nondecreasing with lower power levels. |
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* |
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* IEEE80211_RADIOTAP_DB_TX_ATTENUATION __le16 decibels (dB) |
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* |
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* Transmit power expressed as decibel distance from max power |
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* set at factory calibration. 0 is max power. Monotonically |
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* nondecreasing with lower power levels. |
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* |
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* IEEE80211_RADIOTAP_DBM_TX_POWER s8 decibels from |
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* one milliwatt (dBm) |
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* |
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* Transmit power expressed as dBm (decibels from a 1 milliwatt |
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* reference). This is the absolute power level measured at |
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* the antenna port. |
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* |
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* IEEE80211_RADIOTAP_FLAGS u8 bitmap |
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* |
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* Properties of transmitted and received frames. See flags |
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* defined below. |
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* |
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* IEEE80211_RADIOTAP_ANTENNA u8 antenna index |
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* |
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* Unitless indication of the Rx/Tx antenna for this packet. |
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* The first antenna is antenna 0. |
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* |
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* IEEE80211_RADIOTAP_RX_FLAGS __le16 bitmap |
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* |
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* Properties of received frames. See flags defined below. |
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* |
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* IEEE80211_RADIOTAP_TX_FLAGS __le16 bitmap |
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* |
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* Properties of transmitted frames. See flags defined below. |
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* |
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* IEEE80211_RADIOTAP_RTS_RETRIES u8 data |
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* |
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* Number of rts retries a transmitted frame used. |
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* |
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* IEEE80211_RADIOTAP_DATA_RETRIES u8 data |
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* |
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* Number of unicast retries a transmitted frame used. |
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* |
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* IEEE80211_RADIOTAP_MCS u8, u8, u8 unitless |
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* |
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* Contains a bitmap of known fields/flags, the flags, and |
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* the MCS index. |
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* |
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* IEEE80211_RADIOTAP_AMPDU_STATUS u32, u16, u8, u8 unitless |
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* |
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* Contains the AMPDU information for the subframe. |
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* |
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* IEEE80211_RADIOTAP_VHT u16, u8, u8, u8[4], u8, u8, u16 |
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* |
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* Contains VHT information about this frame. |
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* |
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* IEEE80211_RADIOTAP_TIMESTAMP u64, u16, u8, u8 variable |
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* |
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* Contains timestamp information for this frame. |
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*/ |
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enum ieee80211_radiotap_type { |
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IEEE80211_RADIOTAP_TSFT = 0, |
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IEEE80211_RADIOTAP_FLAGS = 1, |
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IEEE80211_RADIOTAP_RATE = 2, |
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IEEE80211_RADIOTAP_CHANNEL = 3, |
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IEEE80211_RADIOTAP_FHSS = 4, |
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IEEE80211_RADIOTAP_DBM_ANTSIGNAL = 5, |
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IEEE80211_RADIOTAP_DBM_ANTNOISE = 6, |
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IEEE80211_RADIOTAP_LOCK_QUALITY = 7, |
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IEEE80211_RADIOTAP_TX_ATTENUATION = 8, |
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IEEE80211_RADIOTAP_DB_TX_ATTENUATION = 9, |
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IEEE80211_RADIOTAP_DBM_TX_POWER = 10, |
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IEEE80211_RADIOTAP_ANTENNA = 11, |
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IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12, |
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IEEE80211_RADIOTAP_DB_ANTNOISE = 13, |
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IEEE80211_RADIOTAP_RX_FLAGS = 14, |
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IEEE80211_RADIOTAP_TX_FLAGS = 15, |
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IEEE80211_RADIOTAP_RTS_RETRIES = 16, |
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IEEE80211_RADIOTAP_DATA_RETRIES = 17, |
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IEEE80211_RADIOTAP_MCS = 19, |
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IEEE80211_RADIOTAP_AMPDU_STATUS = 20, |
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IEEE80211_RADIOTAP_VHT = 21, |
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IEEE80211_RADIOTAP_TIMESTAMP = 22, |
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/* valid in every it_present bitmap, even vendor namespaces */ |
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IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE = 29, |
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IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30, |
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IEEE80211_RADIOTAP_EXT = 31 |
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}; |
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/* Channel flags. */ |
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#define IEEE80211_CHAN_TURBO 0x0010 /* Turbo channel */ |
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#define IEEE80211_CHAN_CCK 0x0020 /* CCK channel */ |
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#define IEEE80211_CHAN_OFDM 0x0040 /* OFDM channel */ |
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#define IEEE80211_CHAN_2GHZ 0x0080 /* 2 GHz spectrum channel. */ |
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#define IEEE80211_CHAN_5GHZ 0x0100 /* 5 GHz spectrum channel */ |
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#define IEEE80211_CHAN_PASSIVE 0x0200 /* Only passive scan allowed */ |
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#define IEEE80211_CHAN_DYN 0x0400 /* Dynamic CCK-OFDM channel */ |
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#define IEEE80211_CHAN_GFSK 0x0800 /* GFSK channel (FHSS PHY) */ |
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#define IEEE80211_CHAN_GSM 0x1000 /* GSM (900 MHz) */ |
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#define IEEE80211_CHAN_STURBO 0x2000 /* Static Turbo */ |
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#define IEEE80211_CHAN_HALF 0x4000 /* Half channel (10 MHz wide) */ |
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#define IEEE80211_CHAN_QUARTER 0x8000 /* Quarter channel (5 MHz wide) */ |
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/* For IEEE80211_RADIOTAP_FLAGS */ |
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#define IEEE80211_RADIOTAP_F_CFP 0x01 /* sent/received |
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* during CFP |
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*/ |
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#define IEEE80211_RADIOTAP_F_SHORTPRE 0x02 /* sent/received |
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* with short |
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* preamble |
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*/ |
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#define IEEE80211_RADIOTAP_F_WEP 0x04 /* sent/received |
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* with WEP encryption |
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*/ |
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#define IEEE80211_RADIOTAP_F_FRAG 0x08 /* sent/received |
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* with fragmentation |
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*/ |
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#define IEEE80211_RADIOTAP_F_FCS 0x10 /* frame includes FCS */ |
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#define IEEE80211_RADIOTAP_F_DATAPAD 0x20 /* frame has padding between |
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* 802.11 header and payload |
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* (to 32-bit boundary) |
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*/ |
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#define IEEE80211_RADIOTAP_F_BADFCS 0x40 /* bad FCS */ |
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/* For IEEE80211_RADIOTAP_RX_FLAGS */ |
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#define IEEE80211_RADIOTAP_F_RX_BADPLCP 0x0002 /* frame has bad PLCP */ |
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/* For IEEE80211_RADIOTAP_TX_FLAGS */ |
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#define IEEE80211_RADIOTAP_F_TX_FAIL 0x0001 /* failed due to excessive |
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* retries */ |
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#define IEEE80211_RADIOTAP_F_TX_CTS 0x0002 /* used cts 'protection' */ |
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#define IEEE80211_RADIOTAP_F_TX_RTS 0x0004 /* used rts/cts handshake */ |
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#define IEEE80211_RADIOTAP_F_TX_NOACK 0x0008 /* don't expect an ack */ |
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/* For IEEE80211_RADIOTAP_MCS */ |
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#define IEEE80211_RADIOTAP_MCS_HAVE_BW 0x01 |
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#define IEEE80211_RADIOTAP_MCS_HAVE_MCS 0x02 |
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#define IEEE80211_RADIOTAP_MCS_HAVE_GI 0x04 |
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#define IEEE80211_RADIOTAP_MCS_HAVE_FMT 0x08 |
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#define IEEE80211_RADIOTAP_MCS_HAVE_FEC 0x10 |
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#define IEEE80211_RADIOTAP_MCS_HAVE_STBC 0x20 |
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#define IEEE80211_RADIOTAP_MCS_BW_MASK 0x03 |
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#define IEEE80211_RADIOTAP_MCS_BW_20 0 |
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#define IEEE80211_RADIOTAP_MCS_BW_40 1 |
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#define IEEE80211_RADIOTAP_MCS_BW_20L 2 |
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#define IEEE80211_RADIOTAP_MCS_BW_20U 3 |
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#define IEEE80211_RADIOTAP_MCS_SGI 0x04 |
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#define IEEE80211_RADIOTAP_MCS_FMT_GF 0x08 |
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#define IEEE80211_RADIOTAP_MCS_FEC_LDPC 0x10 |
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#define IEEE80211_RADIOTAP_MCS_STBC_MASK 0x60 |
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#define IEEE80211_RADIOTAP_MCS_STBC_1 1 |
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#define IEEE80211_RADIOTAP_MCS_STBC_2 2 |
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#define IEEE80211_RADIOTAP_MCS_STBC_3 3 |
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#define IEEE80211_RADIOTAP_MCS_STBC_SHIFT 5 |
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/* For IEEE80211_RADIOTAP_AMPDU_STATUS */ |
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#define IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN 0x0001 |
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#define IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN 0x0002 |
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#define IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN 0x0004 |
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#define IEEE80211_RADIOTAP_AMPDU_IS_LAST 0x0008 |
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#define IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR 0x0010 |
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#define IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN 0x0020 |
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/* For IEEE80211_RADIOTAP_VHT */ |
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#define IEEE80211_RADIOTAP_VHT_KNOWN_STBC 0x0001 |
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#define IEEE80211_RADIOTAP_VHT_KNOWN_TXOP_PS_NA 0x0002 |
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#define IEEE80211_RADIOTAP_VHT_KNOWN_GI 0x0004 |
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#define IEEE80211_RADIOTAP_VHT_KNOWN_SGI_NSYM_DIS 0x0008 |
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#define IEEE80211_RADIOTAP_VHT_KNOWN_LDPC_EXTRA_OFDM_SYM 0x0010 |
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#define IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED 0x0020 |
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#define IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH 0x0040 |
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#define IEEE80211_RADIOTAP_VHT_KNOWN_GROUP_ID 0x0080 |
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#define IEEE80211_RADIOTAP_VHT_KNOWN_PARTIAL_AID 0x0100 |
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#define IEEE80211_RADIOTAP_VHT_FLAG_STBC 0x01 |
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#define IEEE80211_RADIOTAP_VHT_FLAG_TXOP_PS_NA 0x02 |
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#define IEEE80211_RADIOTAP_VHT_FLAG_SGI 0x04 |
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#define IEEE80211_RADIOTAP_VHT_FLAG_SGI_NSYM_M10_9 0x08 |
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#define IEEE80211_RADIOTAP_VHT_FLAG_LDPC_EXTRA_OFDM_SYM 0x10 |
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#define IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED 0x20 |
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#define IEEE80211_RADIOTAP_CODING_LDPC_USER0 0x01 |
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#define IEEE80211_RADIOTAP_CODING_LDPC_USER1 0x02 |
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#define IEEE80211_RADIOTAP_CODING_LDPC_USER2 0x04 |
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#define IEEE80211_RADIOTAP_CODING_LDPC_USER3 0x08 |
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/* For IEEE80211_RADIOTAP_TIMESTAMP */ |
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#define IEEE80211_RADIOTAP_TIMESTAMP_UNIT_MASK 0x000F |
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#define IEEE80211_RADIOTAP_TIMESTAMP_UNIT_MS 0x0000 |
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#define IEEE80211_RADIOTAP_TIMESTAMP_UNIT_US 0x0001 |
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#define IEEE80211_RADIOTAP_TIMESTAMP_UNIT_NS 0x0003 |
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#define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_MASK 0x00F0 |
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#define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_BEGIN_MDPU 0x0000 |
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#define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_EO_MPDU 0x0010 |
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#define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_EO_PPDU 0x0020 |
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#define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_PLCP_SIG_ACQ 0x0030 |
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#define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_UNKNOWN 0x00F0 |
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#define IEEE80211_RADIOTAP_TIMESTAMP_FLAG_64BIT 0x00 |
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#define IEEE80211_RADIOTAP_TIMESTAMP_FLAG_32BIT 0x01 |
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#define IEEE80211_RADIOTAP_TIMESTAMP_FLAG_ACCURACY 0x02 |
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/* helpers */ |
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static inline int ieee80211_get_radiotap_len(unsigned char *data) |
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{ |
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struct ieee80211_radiotap_header *hdr = |
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(struct ieee80211_radiotap_header *)data; |
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return get_unaligned_le16(&hdr->it_len); |
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} |
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#endif /* IEEE80211_RADIOTAP_H */
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