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 /**    Datagram Transport Layer Security (DTLS)                           */
19 /**                                                                       */
20 /**************************************************************************/
21 /**************************************************************************/
22 
23 #define NX_SECURE_SOURCE_CODE
24 
25 
26 /* Include necessary system files.  */
27 
28 #include "nx_secure_dtls.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_dtls_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 DTLS session delete call.    */
47 /*                                                                        */
48 /*  INPUT                                                                 */
49 /*                                                                        */
50 /*    dtls_session                          DTLS session control block    */
51 /*                                                                        */
52 /*  OUTPUT                                                                */
53 /*                                                                        */
54 /*    status                                Completion status             */
55 /*                                                                        */
56 /*  CALLS                                                                 */
57 /*                                                                        */
58 /*    _nx_secure_dtls_session_delete        Actual DTLS session delete    */
59 /*                                            call                        */
60 /*                                                                        */
61 /*  CALLED BY                                                             */
62 /*                                                                        */
63 /*    Application Code                                                    */
64 /*                                                                        */
65 /*  RELEASE HISTORY                                                       */
66 /*                                                                        */
67 /*    DATE              NAME                      DESCRIPTION             */
68 /*                                                                        */
69 /*  05-19-2020     Timothy Stapko           Initial Version 6.0           */
70 /*  09-30-2020     Timothy Stapko           Modified comment(s),          */
71 /*                                            resulting in version 6.1    */
72 /*                                                                        */
73 /**************************************************************************/
_nxe_secure_dtls_session_delete(NX_SECURE_DTLS_SESSION * dtls_session)74 UINT _nxe_secure_dtls_session_delete(NX_SECURE_DTLS_SESSION *dtls_session)
75 {
76 #ifdef NX_SECURE_ENABLE_DTLS
77 UINT status;
78 NX_SECURE_DTLS_SESSION *session_ptr;
79 
80     if (dtls_session == NX_NULL)
81     {
82         return(NX_PTR_ERROR);
83     }
84 
85     session_ptr = _nx_secure_dtls_created_ptr;
86     for (;;)
87     {
88         if (session_ptr == NX_NULL)
89         {
90 
91             /* No session created. */
92             return(NX_PTR_ERROR);
93         }
94 
95         if (session_ptr == dtls_session)
96         {
97 
98             /* Found the session to delete. */
99             break;
100         }
101 
102         session_ptr = session_ptr -> nx_secure_dtls_created_next;
103 
104         if (session_ptr == _nx_secure_dtls_created_ptr)
105         {
106 
107             /* This session is not created. */
108             return(NX_PTR_ERROR);
109         }
110     }
111 
112     status =  _nx_secure_dtls_session_delete(dtls_session);
113 
114     /* Return completion status.  */
115     return(status);
116 #else
117     NX_PARAMETER_NOT_USED(dtls_session);
118 
119     return(NX_NOT_SUPPORTED);
120 #endif /* NX_SECURE_ENABLE_DTLS */
121 }
122 
123