TlsTransportStatus_t TLS_FreeRTOS_Connect()

in lib/FreeRTOS/network_transport/freertos_plus_tcp/using_mbedtls/using_mbedtls.c [614:703]

• 75 lines of code
• 13 McCabe index (conditional complexity)

TlsTransportStatus_t TLS_FreeRTOS_Connect( NetworkContext_t * pNetworkContext,
                                           const char * pHostName,
                                           uint16_t port,
                                           const NetworkCredentials_t * pNetworkCredentials,
                                           uint32_t receiveTimeoutMs,
                                           uint32_t sendTimeoutMs )
{
    TlsTransportStatus_t returnStatus = TLS_TRANSPORT_SUCCESS;
    BaseType_t socketStatus = 0;

    if( ( pNetworkContext == NULL ) ||
        ( pHostName == NULL ) ||
        ( pNetworkCredentials == NULL ) )
    {
        LogError( ( "Invalid input parameter(s): Arguments cannot be NULL. pNetworkContext=%p, "
                    "pHostName=%p, pNetworkCredentials=%p.",
                    pNetworkContext,
                    pHostName,
                    pNetworkCredentials ) );
        returnStatus = TLS_TRANSPORT_INVALID_PARAMETER;
    }
    else if( ( pNetworkCredentials->pRootCa == NULL ) )
    {
        LogError( ( "pRootCa cannot be NULL." ) );
        returnStatus = TLS_TRANSPORT_INVALID_PARAMETER;
    }
    else
    {
        /* Empty else for MISRA 15.7 compliance. */
    }

    /* Establish a TCP connection with the server. */
    if( returnStatus == TLS_TRANSPORT_SUCCESS )
    {
        socketStatus = Sockets_Connect( &( pNetworkContext->tcpSocket ),
                                        pHostName,
                                        port,
                                        receiveTimeoutMs,
                                        sendTimeoutMs );

        if( socketStatus != 0 )
        {
            LogError( ( "Failed to connect to %s with error %d.",
                        pHostName,
                        socketStatus ) );
            returnStatus = TLS_TRANSPORT_CONNECT_FAILURE;
        }
    }

    /* Initialize mbedtls. */
    if( returnStatus == TLS_TRANSPORT_SUCCESS )
    {
        returnStatus = initMbedtls( &( pNetworkContext->sslContext.entropyContext ),
                                    &( pNetworkContext->sslContext.ctrDrgbContext ) );
    }

    /* Initialize TLS contexts and set credentials. */
    if( returnStatus == TLS_TRANSPORT_SUCCESS )
    {
        returnStatus = tlsSetup( pNetworkContext, pHostName, pNetworkCredentials );
    }

    /* Perform TLS handshake. */
    if( returnStatus == TLS_TRANSPORT_SUCCESS )
    {
        returnStatus = tlsHandshake( pNetworkContext, pNetworkCredentials );
    }

    /* Clean up on failure. */
    if( returnStatus != TLS_TRANSPORT_SUCCESS )
    {
        if( pNetworkContext != NULL )
        {
            sslContextFree( &( pNetworkContext->sslContext ) );

            if( pNetworkContext->tcpSocket != FREERTOS_INVALID_SOCKET )
            {
                ( void ) FreeRTOS_closesocket( pNetworkContext->tcpSocket );
            }
        }
    }
    else
    {
        LogInfo( ( "(Network connection %p) Connection to %s established.",
                   pNetworkContext,
                   pHostName ) );
    }

    return returnStatus;
}