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// Copyright (C) 2014-2021 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include "../../../../include/e2e/profile/profile_custom/protector.hpp"
namespace vsomeip_v3 {
namespace e2e {
namespace profile_custom {
void protector::protect(e2e_buffer &_buffer, instance_t _instance) {
(void)_instance;
std::lock_guard<std::mutex> lock(protect_mutex_);
if (profile_custom::is_buffer_length_valid(config_, _buffer)) {
// compute the CRC over DataID and Data
uint32_t computed_crc = profile_custom::compute_crc(config_, _buffer);
// write CRC in Data
write_crc(_buffer, computed_crc);
}
}
void protector::write_crc(e2e_buffer &_buffer, uint32_t _computed_crc) {
_buffer[config_.crc_offset_] = static_cast<uint8_t>(_computed_crc >> 24U);
_buffer[config_.crc_offset_ + 1U] = static_cast<uint8_t>(_computed_crc >> 16U);
_buffer[config_.crc_offset_ + 2U] = static_cast<uint8_t>(_computed_crc >> 8U);
_buffer[config_.crc_offset_ + 3U] = static_cast<uint8_t>(_computed_crc);
}
} // namespace profile_custom
} // namespace e2e
} // namespace vsomeip_v3
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