mirror of
https://github.com/mfontanini/libtins
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80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
/*
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* Copyright (c) 2017, Matias Fontanini
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* 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 are
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* met:
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*
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* * 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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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef TINS_RADIOTAP_WRITER_H
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#define TINS_RADIOTAP_WRITER_H
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#include <vector>
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#include <stdint.h>
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#include "radiotap_parser.h"
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namespace Tins {
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namespace Utils {
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/**
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* \brief Writes RadioTap options into a buffer
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*
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* This class can write RadioTap options into a buffer, respecting the alignment
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* of each of them.
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*
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* Note that RadioTap options are ordered. Writing multiple of them in a non
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* ascending order will involve several memory moves around the buffer so it
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* will be less efficient.
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*/
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class RadioTapWriter {
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public:
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/**
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* \brief Constructs a RadioTapWriter object
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*
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* Note that a reference to the buffer will be kept and updated so it must
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* be kept in scope while writing options to it
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*/
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RadioTapWriter(std::vector<uint8_t>& buffer);
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/**
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* \brief Writes an option, adding/removing padding as needed
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*
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* The function returns true iff the option was added successfully. This will
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* always be the case, unless an option having that type is already set.
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*
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* \param option The option to be written
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*/
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bool write_option(const RadioTapParser::option& option);
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private:
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std::vector<uint8_t> build_padding_vector(const uint8_t* last_ptr, RadioTapParser& parser);
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void update_paddings(const std::vector<uint8_t>& paddings, uint32_t offset);
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std::vector<uint8_t>& buffer_;
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};
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} // Utils
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} // Tins
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#endif // TINS_RADIOTAP_WRITER_H
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