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Support for serial UART and local domain socket protocolInterfaces.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| /* | ||
| * Copyright 2011, Jacques Fortier | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
| * this software and associated documentation files (the “Software”), to deal in | ||
| * the Software without restriction, including without limitation the rights to | ||
| * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies | ||
| * of the Software, and to permit persons to whom the Software is furnished to do | ||
| * so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in all | ||
| * copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
|
|
||
| #include <stdexcept> | ||
|
|
||
| #include "cobsSerialization.hpp" | ||
|
|
||
| namespace la | ||
| { | ||
| namespace avdecc | ||
| { | ||
| namespace protocol | ||
| { | ||
| namespace cobs | ||
| { | ||
|
|
||
| /** | ||
| * COBS encodes a message | ||
| * @param input [in] pointer to the raw message | ||
| * @param input_length [in] the length of the raw message | ||
| * @param output [out] pointer to the output encode buffer | ||
| * @return the number of bytes written to "output". | ||
| */ | ||
| std::size_t encode(const std::uint8_t* input, std::size_t input_length, std::uint8_t* output) noexcept | ||
| { | ||
| std::size_t read_index = 0, write_index = 1; | ||
| std::size_t code_index = 0; | ||
| std::uint8_t code = 1; | ||
|
|
||
| while (read_index < input_length) | ||
| { | ||
| if (input[read_index] == 0) | ||
| { | ||
| output[code_index] = code; | ||
| code = 1; | ||
| code_index = write_index++; | ||
| read_index++; | ||
| } | ||
| else | ||
| { | ||
| output[write_index++] = input[read_index++]; | ||
| code++; | ||
| if (code == 0xFF) | ||
| { | ||
| output[code_index] = code; | ||
| code = 1; | ||
| code_index = write_index++; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| output[code_index] = code; | ||
|
|
||
| return write_index; | ||
| } | ||
|
|
||
| /** | ||
| * Decodes a COBS encoded message | ||
| * @param input [in] pointer to the COBS encoded message | ||
| * @param input_length [in] the length of the COBS encoded message | ||
| * @param output [in] pointer to the decode buffer | ||
| * @param output_length [in] length of the decode buffer | ||
| * @return the number of bytes written to "output" if "input" was successfully | ||
| * unstuffed, and 0 if there was an error unstuffing "input". | ||
| */ | ||
| std::size_t decode(const std::uint8_t* input, std::size_t input_length, std::uint8_t* output, std::size_t output_length) | ||
| { | ||
| std::size_t read_index = 0, write_index = 0; | ||
| std::uint8_t code, i; | ||
|
|
||
| while (read_index < input_length) | ||
| { | ||
| code = input[read_index]; | ||
|
|
||
| if (read_index + code > input_length && code != 1) | ||
| { | ||
| return 0; | ||
| } | ||
|
|
||
| read_index++; | ||
|
|
||
| for (i = 1; i < code; i++) | ||
| { | ||
| if (write_index == output_length) | ||
| { | ||
| throw std::invalid_argument("Not enough room to decode"); | ||
| } | ||
| output[write_index++] = input[read_index++]; | ||
| } | ||
| if (code != 0xFF && read_index != input_length) | ||
| { | ||
| if (write_index == output_length) | ||
| { | ||
| throw std::invalid_argument("Not enough room to decode"); | ||
| } | ||
| output[write_index++] = '\0'; | ||
| } | ||
| } | ||
|
|
||
| return write_index; | ||
| } | ||
|
|
||
| } // namespace cobs | ||
| } // namespace protocol | ||
| } // namespace avdecc | ||
| } // namespace la |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| /* | ||
| * Copyright 2011, Jacques Fortier | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
| * this software and associated documentation files (the “Software”), to deal in | ||
| * the Software without restriction, including without limitation the rights to | ||
| * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies | ||
| * of the Software, and to permit persons to whom the Software is furnished to do | ||
| * so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in all | ||
| * copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
|
|
||
| #pragma once | ||
|
|
||
| #include <cstdint> | ||
| #include <cstddef> | ||
|
|
||
| namespace la | ||
| { | ||
| namespace avdecc | ||
| { | ||
| namespace protocol | ||
| { | ||
| namespace cobs | ||
| { | ||
| /** | ||
| * Delimiter byte to frame COBS encoded data | ||
| */ | ||
| static constexpr std::uint8_t DelimiterByte = 0; | ||
|
|
||
| /** | ||
| * Macro to calculate the maximum number of COBS pad bytes with a given payload size 'n' | ||
| * @note Do not use this macro to determine the overhead resulting from a COBS encoding. Use the return value from \ref cobs_encode instead | ||
| */ | ||
| #define COBS_BUFFER_PAD(n) ((((n) + 254 - 1) & ~(254 - 1)) / 254) | ||
|
|
||
| /** | ||
| * COBS encodes a message | ||
| * @param input [in] pointer to the raw message | ||
| * @param input_length [in] the length of the raw message | ||
| * @param output [out] pointer to the output encode buffer | ||
| * @return the number of bytes written to "output". | ||
| */ | ||
| std::size_t encode(const std::uint8_t* input, std::size_t input_length, std::uint8_t* output) noexcept; | ||
|
|
||
| /** | ||
| * Decodes a COBS encoded message | ||
| * @param input [in] pointer to the COBS encoded message | ||
| * @param input_length [in] the length of the COBS encoded message | ||
| * @param output [in] pointer to the decode buffer | ||
| * @param output_length [in] length of the decode buffer | ||
| * @return the number of bytes written to "output" if "input" was successfully | ||
| * unstuffed, and 0 if there was an error unstuffing "input". | ||
| */ | ||
| std::size_t decode(const std::uint8_t* input, std::size_t input_length, std::uint8_t* output, std::size_t output_length); | ||
|
|
||
| } // namespace cobs | ||
| } // namespace protocol | ||
| } // namespace avdecc | ||
| } // namespace la |
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