Megatest

(define (send-via-mailbox uconn host-port cmd data)
  (let* ((cmbox     (get-cmbox uconn)) ;; would it be better to keep a stack of mboxes to reuse?
	 (qrykey    (car cmbox))
	 (mbox      (cdr cmbox))
	 (mbox-time (current-milliseconds))
	 (sres      (send uconn host-port qrykey cmd data))) ;; short res
    (if (eq? sres 'ack) ;; BUG: change to be less than server:expiration-timeout?
	(let* ((mbox-timeout-secs    120 #;(if (eq? 'primordial (thread-name (current-thread)))
				     #f
				     120)) ;; timeout)
	       (mbox-timeout-result 'MBOX_TIMEOUT)
	       (res                  (mailbox-receive! mbox mbox-timeout-secs mbox-timeout-result))
	       (mbox-receive-time    (current-milliseconds)))
	  ;; (put-cmbox uconn cmbox) ;; reuse mbox and cookie. is it worth it?