FreeRTOS-Plus/Demo_Projects_Using_FreeRTOS_Simulator/FreeRTOS_Plus_CyaSSL/SecureTCPClientTask.c

/*
    FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.


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    This file is part of the FreeRTOS distribution.

    FreeRTOS is free software; you can redistribute it and/or modify it under
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    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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*/

#pragma comment( lib, "ws2_32.lib" )

/* Win32 includes. */
#include <WinSock2.h>

/* CyaSSL includes. */
#include "cyassl/ssl.h"

/* Standard includes. */
#include <stdint.h>
#include <stdio.h>

/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "task.h"

/*-----------------------------------------------------------*/

/* The CyaSSL context for the client. */
static CYASSL_CTX* xCyaSSL_ClientContext = NULL;

/*-----------------------------------------------------------*/

/* See the comments at the top of main.c. */
void vSecureTCPClientTask( void *pvParameters )
{
SOCKET xClientSocket;
struct sockaddr_in xConnection;
CYASSL* xCyaSSL_Object;
WORD wVersionRequested;
WSADATA xWSAData;
uint8_t cString[ 50 ];
portBASE_TYPE 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 V1 server protocol. */
    xCyaSSL_ClientContext = CyaSSL_CTX_new( CyaTLSv1_client_method() );
	configASSERT( xCyaSSL_ClientContext );

    /* Load the CA certificate. */
    lReturned = CyaSSL_CTX_load_verify_locations( xCyaSSL_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 CyaSSL object to associate 
			with this connection. */
			xCyaSSL_Object = CyaSSL_new( xCyaSSL_ClientContext );
        
			if( xCyaSSL_Object != NULL )
			{
				/* Associate the created CyaSSL object with the connected 
				socket. */
				lReturned = CyaSSL_set_fd( xCyaSSL_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( ( char * ) 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 = CyaSSL_write( xCyaSSL_Object, ( const char * ) cString, strlen( ( const char * ) cString ) + 1 );
					
					
					/* Short delay to prevent the messages streaming up the
					console too quickly. */
					vTaskDelay( 5 );
					ulCount++;

				} while( ( lReturned != SOCKET_ERROR ) && ( ulCount < 10UL ) );
			}
						
			CyaSSL_free( xCyaSSL_Object );
			closesocket( xClientSocket );

			/* Delay for a short time before starting over. */
			vTaskDelay( 50 );
		}
	}
}
/*-----------------------------------------------------------*/