Megatest

      (let* ((my-addr (udat-my-address udata))
	     (my-port (udat-my-port    udata))
	     (th (make-thread (lambda ()
				(ulex-handler-loop udata)) "Captain handler")))
	(udat-handler-thread-set! udata th)
	(udat-captain-address-set! udata my-addr)
	(udat-captain-port-set!    udata my-port)
	(thread-start! th))
	(thread-start! th)
	(print "Captain setup complete and thread started. Address: " my-addr ", port: " my-port))
      (begin
	(print "ERROR: failed to create captain pkt")
	#f)))

;; given a pkts dir read 
;;
(define (get-all-captain-pkts udata)