1 /**
2  * @file
3  * Application layered TCP/TLS connection API (to be used from TCPIP thread)
4  *
5  * This file contains structure definitions for a TLS layer using mbedTLS.
6  */
7 
8 /*
9  * Copyright (c) 2017 Simon Goldschmidt
10  * All rights reserved.
11  *
12  * Redistribution and use in source and binary forms, with or without modification,
13  * are permitted provided that the following conditions are met:
14  *
15  * 1. Redistributions of source code must retain the above copyright notice,
16  *    this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright notice,
18  *    this list of conditions and the following disclaimer in the documentation
19  *    and/or other materials provided with the distribution.
20  * 3. The name of the author may not be used to endorse or promote products
21  *    derived from this software without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
24  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
26  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
28  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
31  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
32  * OF SUCH DAMAGE.
33  *
34  * This file is part of the lwIP TCP/IP stack.
35  *
36  * Author: Simon Goldschmidt <goldsimon@gmx.de>
37  *
38  */
39 #ifndef LWIP_HDR_ALTCP_MBEDTLS_STRUCTS_H
40 #define LWIP_HDR_ALTCP_MBEDTLS_STRUCTS_H
41 
42 #include "lwip/opt.h"
43 
44 #if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
45 
46 #include "lwip/apps/altcp_tls_mbedtls_opts.h"
47 
48 #if LWIP_ALTCP_TLS && LWIP_ALTCP_TLS_MBEDTLS
49 
50 #include "lwip/altcp.h"
51 #include "lwip/pbuf.h"
52 
53 #include "mbedtls/ssl.h"
54 
55 #ifdef __cplusplus
56 extern "C" {
57 #endif
58 
59 #define ALTCP_MBEDTLS_FLAGS_HANDSHAKE_DONE    0x01
60 #define ALTCP_MBEDTLS_FLAGS_UPPER_CALLED      0x02
61 #define ALTCP_MBEDTLS_FLAGS_RX_CLOSE_QUEUED   0x04
62 #define ALTCP_MBEDTLS_FLAGS_RX_CLOSED         0x08
63 
64 typedef struct altcp_mbedtls_state_s {
65   void *conf;
66   mbedtls_ssl_context ssl_context;
67   /* chain of rx pbufs (before decryption) */
68   struct pbuf *rx;
69   struct pbuf *rx_app;
70   u8_t flags;
71   int rx_passed_unrecved;
72   int bio_bytes_read;
73   int bio_bytes_appl;
74   int overhead_bytes_adjust;
75 } altcp_mbedtls_state_t;
76 
77 #ifdef __cplusplus
78 }
79 #endif
80 
81 #endif /* LWIP_ALTCP_TLS && LWIP_ALTCP_TLS_MBEDTLS */
82 #endif /* LWIP_ALTCP */
83 #endif /* LWIP_HDR_ALTCP_MBEDTLS_STRUCTS_H */
84