44 lines
994 B
Racket
44 lines
994 B
Racket
#lang racket
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;; from transport.scm ;;;;;;;
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(require rnrs
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"bytevector.rkt"
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"sosc.rkt"
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"ip.rkt")
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(provide (all-defined-out)
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(all-from-out "ip.rkt"))
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;; socket -> osc -> ()
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(define send
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(lambda (fd m)
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(let ((b (encode-osc m)))
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(cond ((udp:socket? fd)
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(udp:send fd b))
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((tcp:socket? fd)
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(tcp:send fd (encode-u32 (bytevector-length b)))
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(tcp:send fd b))))))
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;; port -> maybe osc
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(define recv
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(lambda (fd)
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(cond ((udp:socket? fd)
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(let ((b (udp:recv fd)))
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(and b (decode-osc b))))
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((tcp:socket? fd)
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(let* ((b (tcp:read fd 4))
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(n (decode-u32 b)))
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(decode-osc (tcp:read fd n)))))))
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;; port -> string -> osc
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(define wait
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(lambda (fd s)
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(let ((p (recv fd)))
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(cond
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((not p) (error "wait" "timed out"))
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((not (string=? (car p) s)) (error "wait" "bad return packet" p s))
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(else p)))))
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