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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2025-present Eclipse ThreadX Contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Secure Component */
/** */
/** Transport Layer Security (TLS) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SECURE_SOURCE_CODE
#include "nx_secure_tls.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_secure_tls_protocol_version_get PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* Return the protocol version to use for the TLS connection. This may */
/* be a user-supplied version using the API */
/* nx_secure_tls_session_protocol_version_override. If no version */
/* override is supplied, the newest supported and enabled version is */
/* returned. */
/* */
/* INPUT */
/* */
/* session_ptr TLS session */
/* protocol_version Pointer to version variable */
/* id TLS or DTLS */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* _nx_secure_dtls_send_clienthello Send ClientHello */
/* _nx_secure_tls_process_clienthello Process ClientHello */
/* _nx_secure_tls_send_clienthello Send ClientHello */
/* */
/**************************************************************************/
VOID _nx_secure_tls_protocol_version_get(NX_SECURE_TLS_SESSION *session_ptr,
USHORT *protocol_version, UINT id)
{
/* First, check for protocol version override and return it if the user has selected to
use a specific version of TLS (even if a newer version is enabled). */
if (session_ptr -> nx_secure_tls_protocol_version_override != 0)
{
(*protocol_version) = session_ptr -> nx_secure_tls_protocol_version_override;
return;
}
/* No user protocol version override, return newest supported version. */
_nx_secure_tls_newest_supported_version(session_ptr, protocol_version, id);
return;
}
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