56 lines
1.4 KiB
Scheme
56 lines
1.4 KiB
Scheme
; Copyright (c) 1993, 1994 Richard Kelsey and Jonathan Rees. See file COPYING.
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; Using sockets from Scheme 48.
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; Server. To make your program be a server, do
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; (call-with-values socket-server
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; (lambda (port-number accept)
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; (display "Port number is ") (write port-number) (newline)
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; (call-with-values accept
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; (lambda (i-port o-port)
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; ... have fun ...))))
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(define (socket-server)
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(let ((s (internet-stream-socket)))
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(values (socket-bind s)
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(lambda ()
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(fd->ports (socket-accept s))))))
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; Client. To make your program be a client, do
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; (call-with-values (lambda ()
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; (socket-client "foo.mit.edu" port-number))
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; (lambda (i-port o-port)
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; ... have fun ...))
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(define (socket-client host-name port-number)
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(fd->ports (socket-connect host-name port-number)))
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; vm-extension calls
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(define (internet-stream-socket)
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(vm-extension 20 #f))
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(define (socket-bind s)
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(vm-extension 21 s))
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(define (socket-accept s)
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(vm-extension 22 s))
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(define (socket-connect host-name port-number)
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(vm-extension 23 (cons host-name port-number)))
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(define (fd->ports fd)
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(values (fd->input-port fd) (fd->output-port fd)))
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(define (fd->input-port fd)
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(let ((port (open-input-file "/dev/null")))
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(vm-extension 24 (cons port fd))
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port))
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(define (fd->output-port fd)
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(let ((port (open-output-file "/dev/null")))
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(vm-extension 25 (cons port fd))
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port))
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