TLS asynchronous events which provide information about the connection:

• SL_OTHER_SIDE_CLOSE_SSL_DATA_NOT_ENCRYPTED – The remote side closed the SSL layer, and the socket is not secured anymore; data can still transfer but is not encrypted.
• SL_SSL_ACCEPT – An error occurred during an SSL accepting, but the socket is ready to accept again with no need to call accept again. A good example of that is a time-out during the handshake.
• SL_SSL_NOTIFICATION_WRONG_ROOT_CA – This event is only available in client mode, and it goes along with the SL_ERROR_BSD_ESEC_ASN_NO_SIGNER_E error received during the sl_Connect command. This event indicates that a certificate in the certificate chain could not be verified because the CA programmed to the file system is not the right CA that signed the chain. This event gives the CommonName of the CA root expected to verify the certificate.

Example:

void slcbSockEvtHdlr(SlSockEvent_t* pSlSockEvent)
{
char *CAname;
if(SL_SOCKET_ASYNC_EVENT == pSlSockEvent->Event)
    {
/* debug print "an event received on socket %d\n",pSlSockEvent->SocketAsyncEvent.SockAsyncData.Sd */switch(pSlSockEvent->SocketAsyncEvent.SockAsyncData.Type)
        {
    case SL_SSL_NOTIFICATION_CONNECTED_SECURED:
        break;
    case SL_SSL_NOTIFICATION_HANDSHAKE_FAILED:
        break;
    case SL_SSL_ACCEPT:
        break;
    case SL_OTHER_SIDE_CLOSE_SSL_DATA_NOT_ENCRYPTED:
        break;
    case SL_SSL_NOTIFICATION_WRONG_ROOT_CA:
        break;
    default:
        break;
        }
    }
}