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/*
* FreeRTOS Kernel V10.4.0
* Copyright (C) 2017 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.
*
* http://www.FreeRTOS.org
* http://aws.amazon.com/freertos
*
* 1 tab == 4 spaces!
*/
#pragma comment( lib, "ws2_32.lib" )
/* Win32 includes. */
#include <WinSock2.h>
/* wolfSSL includes. */
#include "wolfssl/ssl.h"
/* Standard includes. */
#include <stdint.h>
#include <stdio.h>
/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "task.h"
/*-----------------------------------------------------------*/
/* The wolfSSL context for the client. */
static WOLFSSL_CTX* xWolfSSL_ClientContext = NULL;
/*-----------------------------------------------------------*/
/* See the comments at the top of main.c. */
void vSecureTCPClientTask( void *pvParameters )
{
SOCKET xClientSocket;
struct sockaddr_in xConnection;
WOLFSSL* xWolfSSL_Object;
WORD wVersionRequested;
WSADATA xWSAData;
char cString[ 50 ];
BaseType_t lReturned;
uint32_t ulCount = 0UL;
/* Remove compiler warning about unused parameters. */
( void ) pvParameters;
/* Prepare to use WinSock. */
wVersionRequested = MAKEWORD( 2, 2 );
configASSERT( WSAStartup( wVersionRequested, &xWSAData ) == 0 );
/* Set family and port for client socket. */
memset( ( void * ) &xConnection, 0x00, sizeof( struct sockaddr_in ) );
xConnection.sin_family = AF_INET;
xConnection.sin_addr.s_addr = inet_addr("127.0.0.1");
xConnection.sin_port = htons( configTCP_PORT_NUMBER );
/* Attempt to create a context that uses the TLS 1.2 server protocol. */
xWolfSSL_ClientContext = wolfSSL_CTX_new( wolfTLSv1_2_client_method() );
configASSERT( xWolfSSL_ClientContext );
/* Load the CA certificate. */
lReturned = wolfSSL_CTX_load_verify_locations( xWolfSSL_ClientContext, "ca-cert.pem", 0 );
configASSERT( lReturned == SSL_SUCCESS );
for( ;; )
{
/* Create the socket. */
xClientSocket = socket( AF_INET, SOCK_STREAM, 0 );
configASSERT( xClientSocket != INVALID_SOCKET );
/* Connect to the secure server. */
if( connect( xClientSocket, ( SOCKADDR * ) &xConnection, sizeof( xConnection ) ) == 0 )
{
/* The connect was successful. Create a wolfSSL object to associate
with this connection. */
xWolfSSL_Object = wolfSSL_new( xWolfSSL_ClientContext );
if( xWolfSSL_Object != NULL )
{
/* Associate the created wolfSSL object with the connected
socket. */
lReturned = wolfSSL_set_fd( xWolfSSL_Object, xClientSocket );
configASSERT( lReturned == SSL_SUCCESS );
/* The count is used to differentiate between messages sent to
the server, and to break out of the do while loop below. */
ulCount = 0UL;
do
{
/* Create the string that is sent to the secure server. */
sprintf( cString, "Message number %lu\r\n", ulCount );
/* The next line is the secure equivalent of the standard
sockets call:
lReturned = send( xClientSocket, cString, strlen( cString ) + 1, 0 ); */
lReturned = wolfSSL_write( xWolfSSL_Object, cString, strlen( cString ) + 1 );
/* Short delay to prevent the messages streaming up the
console too quickly. */
vTaskDelay( 50 );
ulCount++;
} while( ( lReturned != SOCKET_ERROR ) && ( ulCount < 10UL ) );
}
wolfSSL_free( xWolfSSL_Object );
closesocket( xClientSocket );
/* Delay for a short time before starting over. */
vTaskDelay( 250 );
}
}
}
/*-----------------------------------------------------------*/
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