CC3220S-LAUNCHXL: SimpleLink Secure Socket Connection Failure.

This code uses the netwifi.c file found in many of the examples to make the initial connection to the wlan, but afterwards it attempts a Secure TLS connection to the AWS IOT port, and fails with the -468 error.

This has been discussed in a few threads here with no solution that I can find. There are some workarounds that involve ignoring the connection error, but no solution.

I'm starting a new one because the others have died or become to confused.

Can someone at TI verify that this fails or works on different hardware than I'm using. I manually wrote the DER certificates/key files into directories mentioned.

I'm using a CC3220S LAUNCHXL Rev A.

//*****************************************************************************
// includes
//*****************************************************************************
#include <stdlib.h>

/* TI-DRIVERS Header files */
#include <ti/display/Display.h>
#include <ti/drivers/net/wifi/simplelink.h>
#include "uart_term.h"

//****************************************************************************
//                      LOCAL FUNCTION PROTOTYPES
//****************************************************************************

#define AWS_IOT_MQTT_HOST              "a3joj5u9gv9t8f.iot.us-east-1.amazonaws.com" ///< Customer specific MQTT HOST. The same will be used for Thing Shadow
#define AWS_IOT_MQTT_PORT              8883 ///< default port for MQTT/S

#define AWS_IOT_ROOT_CA_FILENAME       "/cert/root-ca.crt" ///< Root CA file name
#define AWS_IOT_CERTIFICATE_FILENAME   "/cert/545acc1c00-certificate.crt" ///< device signed certificate file name
#define AWS_IOT_PRIVATE_KEY_FILENAME   "/cert/545acc1c00-private.key" ///< Device private key filename

extern void NetWiFi_init();
extern Display_Handle AWSIOT_display;


//*****************************************************************************
//
//! mainThread
//!
//!  \param  pvParameters
//!
//!  \return none
//!
//!  \brief Task handler
//
//*****************************************************************************

void *manualMainThread(void *arg0)
{
    _i16 status = -1;
    _u32 DestinationIP;
    SlSockAddrIn_t Addr;
    _u8 secMethod = SL_SO_SEC_METHOD_SSLv3_TLSV1_2;

    /* Initialize SimpleLink */
    NetWiFi_init();

    // Assume no errors
    sl_NetAppDnsGetHostByName(AWS_IOT_MQTT_HOST, strlen(AWS_IOT_MQTT_HOST), &DestinationIP, SL_AF_INET);
    _i16 sHandle = sl_Socket(SL_AF_INET, SL_SOCK_STREAM, SL_SEC_SOCKET);
    sl_SetSockOpt(sHandle, SL_SOL_SOCKET, SL_SO_SECMETHOD, &secMethod, sizeof(secMethod));
    sl_SetSockOpt(sHandle, SL_SOL_SOCKET, SL_SO_SECURE_FILES_CA_FILE_NAME,
                  &AWS_IOT_ROOT_CA_FILENAME, strlen(AWS_IOT_ROOT_CA_FILENAME));
    sl_SetSockOpt(sHandle, SL_SOL_SOCKET, SL_SO_SECURE_FILES_CERTIFICATE_FILE_NAME,
                  &AWS_IOT_CERTIFICATE_FILENAME, strlen(AWS_IOT_CERTIFICATE_FILENAME));
    sl_SetSockOpt(sHandle, SL_SOL_SOCKET, SL_SO_SECURE_FILES_PRIVATE_KEY_FILE_NAME,
                       &AWS_IOT_PRIVATE_KEY_FILENAME, strlen(AWS_IOT_PRIVATE_KEY_FILENAME));

    Addr.sin_family = SL_AF_INET;
    Addr.sin_port = sl_Htons(AWS_IOT_MQTT_PORT);
    Addr.sin_addr.s_addr = sl_Htonl(DestinationIP);

    // fail -468 error here
    status = sl_Connect(sHandle, (const SlSockAddr_t *)&Addr, sizeof(Addr));
    if ( status < 0 ) {
        Display_printf(AWSIOT_display, 0, 0, "sl_Connect fail: %d\n", status);
        return (NULL);
    }

    sl_Close(sHandle);

    return (NULL);
}