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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 */
/** */
/** Datagram Transport Layer Security (DTLS) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SECURE_SOURCE_CODE
#include "nx_secure_dtls.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_secure_dtls_session_delete PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function deletes a DTLS session object, returning any resources*/
/* to the system. */
/* */
/* INPUT */
/* */
/* dtls_session DTLS session control block */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_secure_dtls_session_reset Clear DTLS control block */
/* _nx_secure_tls_session_delete Delete TLS session */
/* tx_mutex_get Get protection mutex */
/* tx_mutex_put Put protection mutex */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
UINT _nx_secure_dtls_session_delete(NX_SECURE_DTLS_SESSION *dtls_session)
{
#ifdef NX_SECURE_ENABLE_DTLS
UINT status;
/* Reset the DTLS state so this socket can be reused. */
_nx_secure_dtls_session_reset(dtls_session);
/* Delete TLS session. */
status = _nx_secure_tls_session_delete(&dtls_session -> nx_secure_dtls_tls_session);
/* Get the protection. */
tx_mutex_get(&_nx_secure_tls_protection, TX_WAIT_FOREVER);
/* Remove the DTLS instance from the created list. */
/* See if the DTLS instance is the only one on the list. */
if (dtls_session == dtls_session -> nx_secure_dtls_created_next)
{
/* Only created DTLS instance, just set the created list to NULL. */
_nx_secure_dtls_created_ptr = NX_NULL;
}
else
{
/* Otherwise, not the only created DTLS, link-up the neighbors. */
if (dtls_session -> nx_secure_dtls_created_next != NX_NULL)
{
(dtls_session -> nx_secure_dtls_created_next) -> nx_secure_dtls_created_previous =
dtls_session -> nx_secure_dtls_created_previous;
}
(dtls_session -> nx_secure_dtls_created_previous) -> nx_secure_dtls_created_next =
dtls_session -> nx_secure_dtls_created_next;
/* See if we have to update the created list head pointer. */
if (_nx_secure_dtls_created_ptr == dtls_session)
{
/* Yes, move the head pointer to the next link. */
_nx_secure_dtls_created_ptr = dtls_session -> nx_secure_dtls_created_next;
}
}
_nx_secure_dtls_created_count--;
/* Release the protection. */
tx_mutex_put(&_nx_secure_tls_protection);
return(status);
#else
NX_PARAMETER_NOT_USED(dtls_session);
return(NX_NOT_SUPPORTED);
#endif /* NX_SECURE_ENABLE_DTLS */
}
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