1 /**************************************************************************/
2 /*                                                                        */
3 /*       Copyright (c) Microsoft Corporation. All rights reserved.        */
4 /*                                                                        */
5 /*       This software is licensed under the Microsoft Software License   */
6 /*       Terms for Microsoft Azure RTOS. Full text of the license can be  */
7 /*       found in the LICENSE file at https://aka.ms/AzureRTOS_EULA       */
8 /*       and in the root directory of this software.                      */
9 /*                                                                        */
10 /**************************************************************************/
11 
12 
13 /**************************************************************************/
14 /**************************************************************************/
15 /**                                                                       */
16 /** NetX Secure Component                                                 */
17 /**                                                                       */
18 /**    Transport Layer Security (TLS)                                     */
19 /**                                                                       */
20 /**************************************************************************/
21 /**************************************************************************/
22 
23 #define NX_SECURE_SOURCE_CODE
24 
25 
26 /* Include necessary system files.  */
27 
28 #include "nx_secure_tls.h"
29 
30 /* Bring in externs for caller checking code.  */
31 
32 NX_SECURE_CALLER_CHECKING_EXTERNS
33 
34 /**************************************************************************/
35 /*                                                                        */
36 /*  FUNCTION                                               RELEASE        */
37 /*                                                                        */
38 /*    _nxe_secure_tls_session_delete                      PORTABLE C      */
39 /*                                                           6.1          */
40 /*  AUTHOR                                                                */
41 /*                                                                        */
42 /*    Timothy Stapko, Microsoft Corporation                               */
43 /*                                                                        */
44 /*  DESCRIPTION                                                           */
45 /*                                                                        */
46 /*    This function checks for errors in the TLS session delete call.     */
47 /*                                                                        */
48 /*  INPUT                                                                 */
49 /*                                                                        */
50 /*    tls_session                           Pointer to TLS Session        */
51 /*                                                                        */
52 /*  OUTPUT                                                                */
53 /*                                                                        */
54 /*    status                                Completion status             */
55 /*                                                                        */
56 /*  CALLS                                                                 */
57 /*                                                                        */
58 /*    _nx_secure_tls_session_delete         Actual TLS session delete call*/
59 /*                                                                        */
60 /*  CALLED BY                                                             */
61 /*                                                                        */
62 /*    Application Code                                                    */
63 /*                                                                        */
64 /*  RELEASE HISTORY                                                       */
65 /*                                                                        */
66 /*    DATE              NAME                      DESCRIPTION             */
67 /*                                                                        */
68 /*  05-19-2020     Timothy Stapko           Initial Version 6.0           */
69 /*  09-30-2020     Timothy Stapko           Modified comment(s),          */
70 /*                                            resulting in version 6.1    */
71 /*                                                                        */
72 /**************************************************************************/
_nxe_secure_tls_session_delete(NX_SECURE_TLS_SESSION * tls_session)73 UINT  _nxe_secure_tls_session_delete(NX_SECURE_TLS_SESSION *tls_session)
74 {
75 UINT status;
76 NX_SECURE_TLS_SESSION *session_ptr;
77 
78     if (tls_session == NX_NULL)
79     {
80         return(NX_PTR_ERROR);
81     }
82 
83     session_ptr = _nx_secure_tls_created_ptr;
84     for (;;)
85     {
86         if (session_ptr == NX_NULL)
87         {
88 
89             /* No session created. */
90             return(NX_PTR_ERROR);
91         }
92 
93         if (session_ptr == tls_session)
94         {
95 
96             /* Found the session to delete. */
97             break;
98         }
99 
100         session_ptr = session_ptr -> nx_secure_tls_created_next;
101 
102         if (session_ptr == _nx_secure_tls_created_ptr)
103         {
104 
105             /* This session is not created. */
106             return(NX_PTR_ERROR);
107         }
108     }
109 
110     /* Check for appropriate caller.  */
111     NX_THREADS_ONLY_CALLER_CHECKING
112 
113     status =  _nx_secure_tls_session_delete(tls_session);
114 
115     /* Return completion status.  */
116     return(status);
117 }
118 
119