AUTOSAR SOME/IP E2E Profile06 Protect

CMakeLists.txt

cmake_minimum_required(VERSION 3.18)

project(hello-world VERSION 0.1.0 LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED YES)
set(CMAKE_CXX_EXTENSIONS NO)

include(FetchContent)

find_package(Threads REQUIRED)

FetchContent_Declare(
    fmt
    GIT_REPOSITORY https://github.com/fmtlib/fmt.git
    GIT_TAG 12.0.0
)
set(FMT_INSTALL OFF CACHE BOOL "Disable installation for fmt")
set(FMT_TEST OFF CACHE BOOL "Disable tests for fmt")
FetchContent_MakeAvailable(fmt)

FetchContent_Declare(
    doctest
    GIT_REPOSITORY https://github.com/doctest/doctest.git
    GIT_TAG v2.4.12
)
set(DOCTEST_NO_INSTALL ON)
FetchContent_MakeAvailable(doctest)

add_executable(nerd nerd.cpp)
target_link_libraries(nerd PRIVATE doctest::doctest_with_main fmt::fmt Threads::Threads)

enable_testing()
add_test(NAME nerd COMMAND nerd)

nerd.cpp

#include "fmt/std.h"
#include "doctest/doctest.h"

uint16_t E2EProfile06_Protect_Raw(const void* buf, size_t size, uint16_t current_crc) {
    const uint8_t* data = static_cast<const uint8_t*>(buf);
    uint16_t crc = current_crc;

    for (size_t i = 0; i < size; ++i) {
        crc ^= static_cast<uint16_t>(data[i]) << 8;
        for (int bit = 0; bit < 8; ++bit) {
            if (crc & 0x8000U) {
                crc = static_cast<uint16_t>((crc << 1) ^ 0x1021U);
            } else {
                crc = static_cast<uint16_t>(crc << 1);
            }
        }
    }
    return crc;
}

uint16_t E2EProfile06_Protect(const void* buf, size_t size, uint16_t current_crc) {
    // Table-driven CRC-16/CCITT-FALSE implementation (poly 0x1021)
    static const uint16_t crc_table[256] =
        {0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, 0x8108, 0x9129, 0xA14A,
         0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, 0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294,
         0x72F7, 0x62D6, 0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, 0x2462,
         0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485, 0xA56A, 0xB54B, 0x8528, 0x9509,
         0xE5EE, 0xF5CF, 0xC5AC, 0xD58D, 0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695,
         0x46B4, 0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, 0x48C4, 0x58E5,
         0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, 0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948,
         0x9969, 0xA90A, 0xB92B, 0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
         0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, 0x6CA6, 0x7C87, 0x4CE4,
         0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, 0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B,
         0x8D68, 0x9D49, 0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70, 0xFF9F,
         0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78, 0x9188, 0x81A9, 0xB1CA, 0xA1EB,
         0xD10C, 0xC12D, 0xF14E, 0xE16F, 0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046,
         0x6067, 0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E, 0x02B1, 0x1290,
         0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, 0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E,
         0xE54F, 0xD52C, 0xC50D, 0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
         0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C, 0x26D3, 0x36F2, 0x0691,
         0x16B0, 0x6657, 0x7676, 0x4615, 0x5634, 0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9,
         0xB98A, 0xA9AB, 0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3, 0xCB7D,
         0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, 0x4A75, 0x5A54, 0x6A37, 0x7A16,
         0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, 0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8,
         0x8DC9, 0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, 0xEF1F, 0xFF3E,
         0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, 0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93,
         0x3EB2, 0x0ED1, 0x1EF0};

    const uint8_t* data = static_cast<const uint8_t*>(buf);
    uint16_t crc = current_crc;

    for (size_t i = 0; i < size; ++i) {
        uint8_t idx = static_cast<uint8_t>((crc >> 8) ^ data[i]);
        crc = static_cast<uint16_t>((crc << 8) ^ crc_table[idx]);
    }

    return crc;
}

TEST_CASE("check 123456789") {
    // Standard CRC-16/CCITT-FALSE test vector: "123456789" -> 0x29B1
    const char test_data[] = "123456789";
    uint16_t result = E2EProfile06_Protect(test_data, 9, 0xFFFFu);
    CHECK(result == 0x29B1);
}

TEST_CASE("check case 1") {
    // Expected result is 0xb1 0x55
    const char test_data[] = "\x00\x08\x00\x00\x00\x00";
    const char data_id[] = "\x12\x34";
    uint16_t result = E2EProfile06_Protect(test_data, 6, 0xFFFFu);
    result = E2EProfile06_Protect(data_id, 2, result);
    fmt::println("CRC of three zero bytes: {:04X}", result);
    CHECK(result == 0xB155);
}

TEST_CASE("check case 2") {
    std::vector<uint8_t> preamble(8, 0);
    std::vector<uint8_t> payload{0x0, 0x10, 0, 0, 0, 0};
    const char data_id[] = "\x12\x34";
    uint16_t result = E2EProfile06_Protect(preamble.data(), preamble.size(), 0xFFFFu);
    result = E2EProfile06_Protect(payload.data(), payload.size(), result);
    result = E2EProfile06_Protect(data_id, 2, result);
    fmt::println("CRC of three zero bytes: {:04X}", result);
    CHECK(result == 0x4EB7);
}

TEST_CASE("check 123456789 by raw") {
    // Standard CRC-16/CCITT-FALSE test vector: "123456789" -> 0x29B1
    const char test_data[] = "123456789";
    uint16_t result = E2EProfile06_Protect_Raw(test_data, 9, 0xFFFFu);
    CHECK(result == 0x29B1);
}

TEST_CASE("check case 1 by raw") {
    // Expected result is 0xb1 0x55
    const char test_data[] = "\x00\x08\x00\x00\x00\x00";
    const char data_id[] = "\x12\x34";
    uint16_t result = E2EProfile06_Protect_Raw(test_data, 6, 0xFFFFu);
    result = E2EProfile06_Protect_Raw(data_id, 2, result);
    fmt::println("CRC of three zero bytes: {:04X}", result);
    CHECK(result == 0xB155);
}

TEST_CASE("check case 2 by raw") {
    std::vector<uint8_t> preamble(8, 0);
    std::vector<uint8_t> payload{0x0, 0x10, 0, 0, 0, 0};
    const char data_id[] = "\x12\x34";
    uint16_t result = E2EProfile06_Protect_Raw(preamble.data(), preamble.size(), 0xFFFFu);
    result = E2EProfile06_Protect_Raw(payload.data(), payload.size(), result);
    result = E2EProfile06_Protect_Raw(data_id, 2, result);
    fmt::println("CRC of three zero bytes: {:04X}", result);
    CHECK(result == 0x4EB7);
}