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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Secure Component */
/** */
/** Datagram Transport Layer Security (DTLS) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SECURE_SOURCE_CODE
#include "nx_secure_dtls.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_secure_dtls_session_reset PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function resets a DTLS session object, clearing out all data */
/* for initialization or re-use. */
/* */
/* INPUT */
/* */
/* dtls_session DTLS session control block */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* tx_thread_wait_abort Abort wait process */
/* tx_mutex_get Get protection mutex */
/* tx_mutex_put Put protection mutex */
/* _nx_secure_tls_session_reset Clear out the session */
/* nx_secure_tls_packet_release Release packet */
/* */
/* CALLED BY */
/* */
/* Application */
/* _nx_secure_dtls_server_stop Stop DTLS server */
/* _nx_secure_dtls_session_delete Delete the DTLS session */
/* _nx_secure_dtls_session_end End of a session */
/* nx_secure_dtls_session_cache_delete Delete a session */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* released packet securely, */
/* resulting in version 6.1 */
/* 01-31-2022 Timothy Stapko Modified comment(s), */
/* updated cookie handling, */
/* resulting in version 6.1.10 */
/* */
/**************************************************************************/
UINT _nx_secure_dtls_session_reset(NX_SECURE_DTLS_SESSION *dtls_session)
{
#ifdef NX_SECURE_ENABLE_DTLS
NX_PACKET *packet_ptr = NX_NULL;
NX_PACKET *next_packet_ptr;
/* Get the protection. */
tx_mutex_get(&_nx_secure_tls_protection, TX_WAIT_FOREVER);
/* UDP doesn't have a persistent state like TCP, so save off IP address index and Port. */
dtls_session -> nx_secure_dtls_local_ip_address_index = 0xffffffff;
dtls_session -> nx_secure_dtls_local_port = 0;
/* Reset remote port and address. */
dtls_session -> nx_secure_dtls_remote_ip_address.nxd_ip_version = 0;
dtls_session -> nx_secure_dtls_remote_port = 0;
/* Reset session state. */
dtls_session -> nx_secure_dtls_session_in_use = NX_FALSE;
/* Reset the cookie. */
dtls_session -> nx_secure_dtls_cookie_length = 0;
NX_SECURE_MEMSET(dtls_session -> nx_secure_dtls_cookie, 0, sizeof(dtls_session -> nx_secure_dtls_cookie));
dtls_session -> nx_secure_dtls_client_cookie_ptr = NX_NULL;
/* Reset the fragment length. */
dtls_session -> nx_secure_dtls_fragment_length = 0;
/* Reset the handshake sequence numbers. */
dtls_session -> nx_secure_dtls_local_handshake_sequence = 0;
dtls_session -> nx_secure_dtls_remote_handshake_sequence = 0;
dtls_session -> nx_secure_dtls_expected_handshake_sequence = 0;
/* Reset the DTLS epoch. */
dtls_session -> nx_secure_dtls_local_epoch = 0;
dtls_session -> nx_secure_dtls_remote_epoch = 0;
/* Is there any thread waiting for packet? */
if (dtls_session -> nx_secure_dtls_thread_suspended)
{
/* Yes. Just abort it. */
tx_thread_wait_abort(dtls_session -> nx_secure_dtls_thread_suspended);
dtls_session -> nx_secure_dtls_thread_suspended = NX_NULL;
}
/* Reset the receive queue. */
if (dtls_session -> nx_secure_dtls_receive_queue_head)
{
packet_ptr = dtls_session -> nx_secure_dtls_receive_queue_head;
dtls_session -> nx_secure_dtls_receive_queue_head = NX_NULL;
}
/* Reset the internal TLS session state. */
_nx_secure_tls_session_reset(&dtls_session -> nx_secure_dtls_tls_session);
/* Release the protection. */
tx_mutex_put(&_nx_secure_tls_protection);
/* Release the queued packets. */
while (packet_ptr)
{
next_packet_ptr = packet_ptr -> nx_packet_queue_next;
nx_secure_tls_packet_release(packet_ptr);
packet_ptr = next_packet_ptr;
}
return(NX_SUCCESS);
#else
NX_PARAMETER_NOT_USED(dtls_session);
return(NX_NOT_SUPPORTED);
#endif /* NX_SECURE_ENABLE_DTLS */
}
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