/usr/include/tins/radiotap.h is in libtins-dev 1.1-1.
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* Copyright (c) 2012, Matias Fontanini
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER OR CONTRIBUTORS 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 TINS_RADIOTAP_H
#define TINS_RADIOTAP_H
#include "macros.h"
#include "pdu.h"
#include "endianness.h"
namespace Tins {
class PacketSender;
/**
* \brief Class that represents the IEEE 802.11 radio tap header.
*
* By default, RadioTap PDUs set the necesary fields to send an 802.11
* PDU as its inner pdu, avoiding packet drops. As a consequence,
* the FCS-at-end flag is on, the channel is set to 1, TSFT is set to 0,
* dbm_signal is set to 0xce, and the rx_flag and antenna fields to 0.
*/
class RadioTap : public PDU {
public:
/**
* \brief This PDU's flag.
*/
static const PDU::PDUType pdu_flag = PDU::RADIOTAP;
/**
* \brief Enumeration of the different channel type flags.
*
* These channel type flags can be OR'd and set using the
* RadioTap::channel() method.
*/
enum ChannelType {
TURBO = 0x10,
CCK = 0x20,
OFDM = 0x40,
TWO_GZ = 0x80,
FIVE_GZ = 0x100,
PASSIVE = 0x200,
DYN_CCK_OFDM = 0x400,
GFSK = 0x800
};
/**
* \brief Flags used in the present field.
*
* \sa RadioTap::present()
*/
enum PresentFlags {
TSTF = 1,
FLAGS = 2,
RATE = 4,
CHANNEL = 8,
FHSS = 16,
DBM_SIGNAL = 32,
DBM_NOISE = 64,
LOCK_QUALITY = 128,
TX_ATTENUATION = 256,
DB_TX_ATTENUATION = 512,
DBM_TX_ATTENUATION = 1024,
ANTENNA = 2048,
DB_SIGNAL = 4096,
DB_NOISE = 8192,
RX_FLAGS = 16382
};
/**
* \brief Flags used in the RadioTap::flags() method.
*/
enum FrameFlags {
CFP = 1,
PREAMBLE = 2,
WEP = 4,
FRAGMENTATION = 8,
FCS = 16,
PADDING = 32,
FAILED_FCS = 64,
SHORT_GI = 128
};
/**
* \brief Default constructor.
*/
RadioTap();
/**
* \brief Constructs a RadioTap object from a buffer and adds all
* identifiable PDUs found in the buffer as children of this one.
*
* If there is not enough size for a RadioTap header, a
* malformed_packet exception is thrown.
*
* \param buffer The buffer from which this PDU will be constructed.
* \param total_sz The total size of the buffer.
*/
RadioTap(const uint8_t *buffer, uint32_t total_sz);
/* Setters */
#ifndef WIN32
/**
* \sa PDU::send()
*/
void send(PacketSender &sender, const NetworkInterface &iface);
#endif
/**
* \brief Setter for the version field.
* \param new_version The new version.
*/
void version(uint8_t new_version);
/**
* \brief Setter for the padding field.
* \param new_padding The new padding.
*/
void padding(uint8_t new_padding);
/**
* \brief Setter for the length field.
* \param new_length The new length.
*/
void length(uint16_t new_length);
/**
* \brief Setter for the TSFT field.
* \param new_tsft The new TSFT
*/
void tsft(uint64_t new_tsft);
/**
* \brief Setter for the flags field.
* \param new_flags The new flags.
*/
void flags(FrameFlags new_flags);
/**
* \brief Setter for the rate field.
* \param new_rate The new rate.
*/
void rate(uint8_t new_rate);
/**
* \brief Setter for the channel frequency and type field.
* \param new_freq The new channel frequency.
* \param new_type The new channel type.
*/
void channel(uint16_t new_freq, uint16_t new_type);
/**
* \brief Setter for the dbm signal field.
* \param new_dbm_signal The new dbm signal.
*/
void dbm_signal(uint8_t new_dbm_signal);
/**
* \brief Setter for the dbm noise field.
* \param new_dbm_noise The new dbm noise.
*/
void dbm_noise(uint8_t new_dbm_noise);
/**
* \brief Setter for the signal quality field.
* \param new_antenna The signal quality signal.
*/
void signal_quality(uint8_t new_signal_quality);
/**
* \brief Setter for the antenna field.
* \param new_antenna The antenna signal.
*/
void antenna(uint8_t new_antenna);
/**
* \brief Setter for the db signal field.
* \param new_antenna The db signal signal.
*/
void db_signal(uint8_t new_db_signal);
/**
* \brief Setter for the rx flag field.
* \param new_rx_flag The antenna signal.
*/
void rx_flags(uint16_t new_rx_flag);
/* Getters */
/**
* \brief Getter for the version field.
* \return The version field.
*/
uint8_t version() const { return _radio.it_version; }
/**
* \brief Getter for the padding field.
* \return The padding field.
*/
uint8_t padding() const { return _radio.it_pad; }
/**
* \brief Getter for the length field.
* \return The length field.
*/
uint16_t length() const { return Endian::le_to_host(_radio.it_len); }
/**
* \brief Getter for the tsft field.
* \return The tsft field.
*/
uint64_t tsft() const { return Endian::le_to_host(_tsft); }
/**
* \brief Getter for the flags field.
* \return The flags field.
*/
FrameFlags flags() const { return (FrameFlags)_flags; }
/**
* \brief Getter for the rate field.
* \return The rate field.
*/
uint8_t rate() const { return _rate; }
/**
* \brief Getter for the channel frequency field.
* \return The channel frequency field.
*/
uint16_t channel_freq() const { return Endian::le_to_host(_channel_freq); }
/**
* \brief Getter for the channel type field.
* \return The channel type field.
*/
uint16_t channel_type() const { return Endian::le_to_host(_channel_type); }
/**
* \brief Getter for the dbm signal field.
* \return The dbm signal field.
*/
uint8_t dbm_signal() const { return _dbm_signal; }
/**
* \brief Getter for the dbm noise field.
* \return The dbm noise field.
*/
uint8_t dbm_noise() const { return _dbm_noise; }
/**
* \brief Getter for the signal quality field.
* \return The signal quality field.
*/
uint16_t signal_quality() const { return _signal_quality; }
/**
* \brief Getter for the antenna field.
* \return The antenna field.
*/
uint8_t antenna() const { return _antenna; }
/**
* \brief Getter for the db signal field.
* \return The db signal field.
*/
uint8_t db_signal() const { return _db_signal; }
/**
* \brief Getter for the channel+ field.
* \return The channel+ field.
*/
uint32_t channel_plus() const { return Endian::le_to_host(_channel_type); }
/**
* \brief Getter for the rx flags field.
* \return The rx flags field.
*/
uint16_t rx_flags() const { return Endian::le_to_host(_rx_flags); }
/**
* \brief Getter for the present bit fields.
*
* Use this method and masks created from the values taken from
* the PresentFlags enum to find out which fields are set.
* Accessing non-initialized fields, the behaviour is undefined
* will be undefined. It is only safe to use the getter of a field
* if its corresponding bit flag is set in the present field.
*/
PresentFlags present() const {
return (PresentFlags)*(uint32_t*)(&_radio.it_len + 1);
}
/** \brief Check wether ptr points to a valid response for this PDU.
*
* \sa PDU::matches_response
* \param ptr The pointer to the buffer.
* \param total_sz The size of the buffer.
*/
bool matches_response(const uint8_t *ptr, uint32_t total_sz) const;
/**
* \brief Returns the RadioTap frame's header length.
*
* \return An uint32_t with the header's size.
* \sa PDU::header_size()
*/
uint32_t header_size() const;
/**
* \brief Returns the frame's trailer size.
* \return The trailer's size.
*/
uint32_t trailer_size() const;
/**
* \sa PDU::clone
*/
RadioTap *clone() const {
return new RadioTap(*this);
}
/**
* \brief Getter for the PDU's type.
* \sa PDU::pdu_type
*/
PDUType pdu_type() const { return PDU::RADIOTAP; }
private:
TINS_BEGIN_PACK
struct radiotap_hdr {
#if TINS_IS_LITTLE_ENDIAN
uint8_t it_version;
uint8_t it_pad;
uint16_t it_len;
uint32_t tsft:1,
flags:1,
rate:1,
channel:1,
fhss:1,
dbm_signal:1,
dbm_noise:1,
lock_quality:1,
tx_attenuation:1,
db_tx_attenuation:1,
dbm_tx_attenuation:1,
antenna:1,
db_signal:1,
db_noise:1,
rx_flags:1,
reserved1:3,
channel_plus:1,
reserved2:12,
ext:1;
#else
uint8_t it_pad;
uint8_t it_version;
uint16_t it_len;
uint32_t lock_quality:1,
dbm_noise:1,
dbm_signal:1,
fhss:1,
channel:1,
rate:1,
flags:1,
tsft:1,
reserved3:1,
rx_flags:1,
db_tx_attenuation:1,
dbm_tx_attenuation:1,
antenna:1,
db_signal:1,
db_noise:1,
tx_attenuation:1,
reserved2:5,
channel_plus:1,
reserved1:2,
reserved4:7,
ext:1;
#endif
} TINS_END_PACK;
void init();
void write_serialization(uint8_t *buffer, uint32_t total_sz, const PDU *parent);
radiotap_hdr _radio;
// present fields...
uint64_t _tsft;
uint32_t _channel_type;
uint16_t _channel_freq, _rx_flags, _signal_quality;
uint8_t _antenna, _flags, _rate, _dbm_signal, _dbm_noise, _channel, _max_power, _db_signal;
};
}
#endif // TINS_RADIOTAP_H
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