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// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012- OpenVPN Inc.
//
// SPDX-License-Identifier: MPL-2.0 OR AGPL-3.0-only WITH openvpn3-openssl-exception
//
#ifndef ALIGNMENT_HEADER_PARSED
#define ALIGNMENT_HEADER_PARSED
#include <cstring>
#include <type_traits>
namespace openvpn {
/**
* @brief Converts a byte buffer to the desired type, avoiding undefined behavior due to alignment.
* @details Replaces a simple cast with an alignment safe alternative. Useful when scraping data
* out of wire oriented buffers and so on.
*
* @tparam T type to convert to
* @param toAlign starting address of the bytes to be converted
* @return T output value and type
*/
template <typename T, typename = std::enable_if_t<std::is_trivially_copyable<T>::value>>
T alignment_safe_extract(const void *toAlign) noexcept
{
T ret;
std::memcpy(&ret, toAlign, sizeof(T));
return ret;
}
} // namespace openvpn
#endif
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