Hi Inaky,

> -unsigned int __ofono_sms_txq_submit(struct ofono_sms *sms, GSList *list,
> -					unsigned int flags,
> +struct tx_queue_entry * __ofono_sms_txq_submit(struct ofono_sms *sms, GSList *list,
> +					unsigned int flags, unsigned ref,
>  					ofono_sms_txq_submit_cb_t cb,
>  					void *data, ofono_destroy_func destroy);

I disagree with this, you're modifying an ofono internal API function to
return a structure which is opaque and cannot be manipulated.  I'd
rather see you returning a struct sms_uuid...

> +	/*
> +	 * Instead of using the telephone number/address we got from
> +	 * D-Bus, we do the reverse formatting, so we get something
> +	 * that has been normalized--this is used later and we do it
> +	 * here to simplify error handling.
> +	 */
> +	sms_address_from_string(&receiver, to);
> +	if (sms_address_to_hex_string(&receiver, receiver_str)
> +	    == FALSE)
> +		return __ofono_error_failed(msg);

Please avoid mixing tabs and spaces for indentation.  And in this case
it is more readale to break up the function than the equals line.  E.g.

if (sms_address_to_hex_string(&receiver,
				receiver_str == FALSE)
	return __ofono_error_failed(msg);

Regards,
-Denis