1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/*
* FreeRTOS V202111.00
* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
/**
* @file mbedtls_bio_freertos_plus_tcp.c
* @brief Implements mbed TLS platform send/receive functions for freertos plus tcp.
*/
/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "FreeRTOS_Sockets.h"
/* mbed TLS includes. */
#include "mbedtls_config.h"
#include "threading_alt.h"
#include "mbedtls/entropy.h"
#include "mbedtls/ssl.h"
/*-----------------------------------------------------------*/
/**
* @brief Sends data over FreeRTOS+TCP sockets.
*
* @param[in] ctx The network context containing the socket handle.
* @param[in] buf Buffer containing the bytes to send.
* @param[in] len Number of bytes to send from the buffer.
*
* @return Number of bytes sent on success; else a negative value.
*/
int mbedtls_platform_send( void * ctx,
const unsigned char * buf,
size_t len )
{
BaseType_t sendStatus = 0;
int returnStatus = -1;
configASSERT( ctx != NULL );
configASSERT( buf != NULL );
sendStatus = FreeRTOS_send( ( Socket_t ) ctx, buf, len, 0 );
switch( sendStatus )
{
/* Socket was closed or just got closed. */
case -pdFREERTOS_ERRNO_ENOTCONN:
/* Not enough memory for the socket to create either an Rx or Tx stream. */
case -pdFREERTOS_ERRNO_ENOMEM:
/* Socket is not valid, is not a TCP socket, or is not bound. */
case -pdFREERTOS_ERRNO_EINVAL:
/* Socket received a signal, causing the read operation to be aborted. */
case -pdFREERTOS_ERRNO_EINTR:
returnStatus = MBEDTLS_ERR_SSL_INTERNAL_ERROR;
break;
/* A timeout occurred before any data could be sent. */
case -pdFREERTOS_ERRNO_ENOSPC:
returnStatus = MBEDTLS_ERR_SSL_TIMEOUT;
break;
default:
returnStatus = ( int ) sendStatus;
break;
}
return returnStatus;
}
/*-----------------------------------------------------------*/
/**
* @brief Receives data from FreeRTOS+TCP socket.
*
* @param[in] ctx The network context containing the socket handle.
* @param[out] buf Buffer to receive bytes into.
* @param[in] len Number of bytes to receive from the network.
*
* @return Number of bytes received if successful; Negative value on error.
*/
int mbedtls_platform_recv( void * ctx,
unsigned char * buf,
size_t len )
{
BaseType_t recvStatus = 0;
int returnStatus = -1;
configASSERT( ctx != NULL );
configASSERT( buf != NULL );
recvStatus = FreeRTOS_recv( ( Socket_t ) ctx, buf, len, 0 );
switch( recvStatus )
{
/* No data could be sent because the socket was or just got closed. */
case -pdFREERTOS_ERRNO_ENOTCONN:
/* No data could be sent because there was insufficient memory. */
case -pdFREERTOS_ERRNO_ENOMEM:
/* No data could be sent because xSocket was not a valid TCP socket. */
case -pdFREERTOS_ERRNO_EINVAL:
returnStatus = MBEDTLS_ERR_SSL_INTERNAL_ERROR;
break;
/* A timeout occurred before any data could be received. */
case 0:
returnStatus = MBEDTLS_ERR_SSL_WANT_READ;
break;
default:
returnStatus = ( int ) recvStatus;
break;
}
return returnStatus;
}
|
