796 lines
27 KiB
Scheme
796 lines
27 KiB
Scheme
;;; Networking for the Scheme Shell
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;;; Copyright (c) 1994-1995 by Brian D. Carlstrom.
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;;; Copyright (c) 1994 by Olin Shivers.
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;;; See file COPYING.
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;;; Scheme48 implementation.
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; High Level Prototypes
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (socket-connect protocol-family socket-type . args)
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(let* ((sock (create-socket protocol-family
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socket-type))
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(addr (cond ((= protocol-family
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protocol-family/internet)
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(let* ((host (car args))
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(port (cadr args))
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(host (car (host-info:addresses
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(name->host-info host))))
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(port (cond ((integer? port) port)
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((string? port)
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(service-info:port
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(service-info (cadr args) "tcp")))
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(else
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(error
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"socket-connect: bad arg ~s"
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args)))))
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(internet-address->socket-address host port)))
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((= protocol-family
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protocol-family/unix)
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(unix-address->socket-address (car args)))
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(else
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(error "socket-connect: unsupported protocol-family ~s"
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protocol-family)))))
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;; Close the socket and free the file-descriptors
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;; if the connect fails:
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(let ((connected #f))
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(dynamic-wind
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(lambda () #f)
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(lambda () (connect-socket sock addr) (set! connected #t))
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(lambda ()
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(if (not connected)
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(close-socket sock))
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))
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(if connected
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sock
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#f))))
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(define (bind-listen-accept-loop protocol-family proc arg)
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(let* ((sock (create-socket protocol-family socket-type/stream))
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(addr (cond ((= protocol-family
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protocol-family/internet)
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(let ((port (cond ((integer? arg) arg)
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((string? arg)
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(service-info:port
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(service-info arg "tcp")))
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(else
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(error "socket-connect: bad arg ~s"
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arg)))))
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(internet-address->socket-address internet-address/any
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arg)))
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((= protocol-family
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protocol-family/unix)
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(unix-address->socket-address arg))
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(else
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(error "bind-listen-accept-loop: unsupported protocol-family ~s"
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protocol-family)))))
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(set-socket-option sock level/socket socket/reuse-address #t)
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(bind-socket sock addr)
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(listen-socket sock 5)
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(with-handler
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(lambda (condition more)
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(with-handler
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(lambda (condition ignore) (more))
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(lambda () (close-socket sock)))
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(more))
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(lambda ()
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(let loop ()
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(with-errno-handler
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;; ECONNABORTED we just ignore
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((errno packet)
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((errno/connaborted) 'fick-dich-ins-knie))
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(call-with-values
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(lambda () (accept-connection sock))
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proc))
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(loop))))))
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; Socket Record Structure
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define-record socket
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family ; protocol family
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inport ; input port
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outport) ; output port
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(define-record socket-address
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family ; address family
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address) ; address
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;;; returns the fdes of a socket
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;;; not exported
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(define (socket->fdes sock)
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(fdport-data:fd (port-data (socket:inport sock))))
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; Socket Address Routines
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (internet-address->socket-address address32 port16)
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(cond ((not (<= 0 address32 #xffffffff))
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(error "internet-address->socket-address: address out of range ~s"
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address32))
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((not (<= 0 port16 #xffff))
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(error "internet-address->socket-address: port out of range ~s"
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port16))
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(else
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(make-socket-address address-family/internet
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(cons address32 port16)))))
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(define (socket-address->internet-address sockaddr)
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(if (or (not (socket-address? sockaddr))
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(not (= (socket-address:family sockaddr)
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address-family/internet)))
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(error "socket-address->internet-address: internet socket expected ~s"
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sockaddr)
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(values (car (socket-address:address sockaddr))
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(cdr (socket-address:address sockaddr)))))
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(define (unix-address->socket-address path)
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(if (> (string-length path) 108)
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(error "unix-address->socket-address: path too long ~s" path)
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(make-socket-address address-family/unix path)))
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(define (socket-address->unix-address sockaddr)
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(if (or (not (socket-address? sockaddr))
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(not (= (socket-address:family sockaddr)
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address-family/unix)))
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(error "socket-address->unix-address expects an unix socket ~s" sockaddr)
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(socket-address:address sockaddr)))
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(define (make-addr af)
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(make-string (cond ((= af address-family/unix) 108)
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((= af address-family/internet) 8)
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(else
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(error "make-addr: unknown address-family ~s" af)))))
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; socket syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (create-socket pf type . maybe-protocol)
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(let ((protocol (:optional maybe-protocol 0)))
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(if (not (and (integer? pf)
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(integer? type)
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(integer? protocol)))
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(error "create-socket: integer arguments expected ~s ~s ~s"
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pf type protocol)
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(let* ((fd (%socket pf type protocol))
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(in (make-input-fdport fd 0))
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(out (dup->outport in)))
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(set-fdes-status in open/non-blocking)
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(set-fdes-status out open/non-blocking)
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(make-socket pf in out)))))
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;;; Turn a file descriptor into a socket.
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(define (port->socket port pf)
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;;; ensure underlying fd is a socket by a random getsockopt call
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(if (not (port? port))
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(error "first argument to port->socket is not a port" port))
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(sleazy-call/fdes
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port
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(lambda (fd)
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(%getsockopt fd level/socket socket/debug)))
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(let ((in (dup->inport port))
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(out (dup->outport port)))
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(make-socket pf in out)))
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(import-os-error-syscall %socket (pf type protocol) "scsh_socket")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; close syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (close-socket sock)
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(close (socket:inport sock))
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(close (socket:outport sock)))
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; bind syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (bind-socket sock name)
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(cond ((not (socket? sock))
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(error "bind-socket: socket expected ~s" sock))
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((not (socket-address? name))
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(error "bind-socket: socket-address expected ~s" name))
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(else
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(let ((family (socket:family sock)))
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(cond ((not (= family (socket-address:family name)))
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(error
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"bind-socket: trying to bind incompatible address to socket ~s"
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name))
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((and (= family address-family/unix)
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(> (string-length (socket-address->unix-address name)) 107))
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(error "bind-socket: path too long" name))
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(else
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(%bind (socket->fdes sock)
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family
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(socket-address:address name))))))))
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(import-os-error-syscall %bind (sockfd family name) "scheme_bind")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; connect syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (connect-socket-no-wait sock name)
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(cond ((not (socket? sock))
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(error "connect-socket: socket expected ~s" sock))
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((not (socket-address? name))
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(error "connect-socket: socket-address expected ~s" name))
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(else
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(let ((family (socket:family sock)))
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(cond ((not (= family (socket-address:family name)))
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(error
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"connect: trying to connect socket to incompatible address ~s"
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name))
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((and (= family address-family/unix)
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; save space for \0
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(> (string-length (socket-address:address name)) 107))
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(error "connect: filename too long" name))
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(else
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(let loop ()
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(let* ((fdes (socket->fdes sock))
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(error?.einprogress?
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(%connect fdes
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(socket:family sock)
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(socket-address:address name))))
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(if (car error?.einprogress?)
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(if (cdr error?.einprogress?)
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#f
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(loop))
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#t)))))))))
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(define (connect-socket-successful? sock)
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;; If connect returned EINPROGRESS, we can check
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;; it's success after the next success with getsockopt
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(zero? (socket-option sock level/socket socket/error)))
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(define (connect-socket sock name)
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(let ((success? (connect-socket-no-wait sock name)))
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(cond ((not success?)
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(select '#()
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(vector (fdport-data:fd
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(fdport-data
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(socket:outport sock))))
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'#())
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(if (not (connect-socket-successful? sock))
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(let ((errno (socket-option sock level/socket socket/error)))
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(errno-error errno
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(errno-msg errno)
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%connect
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sock
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name)))))))
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(import-os-error-syscall %connect (sockfd family name) "scheme_connect")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; listen syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (listen-socket sock backlog)
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(cond ((not (socket? sock))
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(error "listen-socket: socket expected ~s" sock))
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((not (integer? backlog))
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(error "listen-socket: integer expected ~s" backlog))
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(else
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(%listen (socket->fdes sock) backlog))))
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(import-os-error-syscall %listen (sockfd backlog) "scsh_listen")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; accept syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (accept-connection sock)
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(if (not (socket? sock))
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(error "accept-connection: socket expected ~s" sock)
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(let ((family (socket:family sock)))
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(let loop ()
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((structure-ref interrupts disable-interrupts!))
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(let ((fd-addr (%accept (socket->fdes sock) family)))
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(cond ((pair? fd-addr)
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(let ((fd (car fd-addr))
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(addr (cdr fd-addr)))
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((structure-ref interrupts
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enable-interrupts!))
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(let* ((in (make-input-fdport fd 0))
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(out (dup->outport in)))
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(values (make-socket family in out)
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(make-socket-address family addr)))))
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(else (wait-for-channel
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(fdport-data:channel
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(fdport-data (socket:inport sock))))
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(loop))))))))
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(import-os-error-syscall %accept (sockfd family) "scheme_accept")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; getpeername syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (socket-remote-address sock)
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(if (or (not (socket? sock))
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(not (= (socket:family sock) address-family/internet)))
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(error "socket-remote-address: internet socket expected ~s" sock)
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(let* ((family (socket:family sock))
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(addr (%peer-name (socket->fdes sock)
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family)))
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(make-socket-address family addr))))
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(import-os-error-syscall %peer-name (sockfd family) "scheme_peer_name")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; getsockname syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (socket-local-address sock)
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(if (or (not (socket? sock))
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(not (= (socket:family sock) address-family/internet)))
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(error "socket-local-address: internet socket expected ~s" sock)
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(let* ((family (socket:family sock))
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(addr (%socket-name (socket->fdes sock) family)))
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(make-socket-address family addr))))
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(import-os-error-syscall %socket-name (sockfd family) "scheme_socket_name")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; shutdown syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (shutdown-socket sock how)
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(cond ((not (socket? sock))
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(error "shutdown-socket: socket expected ~s" sock))
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((not (integer? how))
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(error "shutdown-socket: integer expected ~s" how))
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(else
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(%shutdown (socket->fdes sock) how))))
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(import-os-error-syscall %shutdown (sockfd how) "scsh_shutdown")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; socketpair syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (create-socket-pair type)
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(if (not (integer? type))
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(error "create-socket-pair: integer argument expected ~s" type)
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(apply
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(lambda (s1 s2)
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(let* ((in1 (make-input-fdport s1 0))
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(out1 (dup->outport in1))
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(in2 (make-input-fdport s2 0))
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(out2 (dup->outport in2)))
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(values (make-socket protocol-family/unix in1 out1)
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(make-socket protocol-family/unix in2 out2))))
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(%socket-pair type))))
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(import-os-error-syscall %socket-pair (type) "scheme_socket_pair")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; recv syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (receive-message socket len . maybe-flags)
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(let ((flags (:optional maybe-flags 0)))
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(cond ((not (socket? socket))
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(error "receive-message: socket expected ~s" socket))
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((or (not (integer? flags))
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(not (integer? len)))
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(error "receive-message: integer expected ~s ~s" flags len))
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(else
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(let ((s (make-string len)))
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(receive (nread from)
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(receive-message! socket s 0 len flags)
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(values
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(cond ((not nread) #f) ; EOF
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((= nread len) s)
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(else (substring s 0 nread)))
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from)))))))
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(define (receive-message! socket s . args)
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(if (not (string? s))
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(error "receive-message!: string expected ~s" s)
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(let-optionals args ((start 0) (end (string-length s)) (flags 0))
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(cond ((not (socket? socket))
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(error "receive-message!: socket expected ~s" socket))
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((not (or (integer? flags)
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(integer? start)
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(integer? end)))
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(error "receive-message!: integer expected ~s ~s ~s"
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flags start end))
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(else
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(generic-receive-message! socket flags
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s start end
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recv-substring!
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(socket:family socket)))))))
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(define (generic-receive-message! socket flags s start end reader family)
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(if (bogus-substring-spec? s start end)
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(error "Bad substring indices"
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reader socket flags
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s start end family))
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(let loop ((i start) (remote #f))
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(if (>= i end)
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(values (- i start) (make-socket-address family remote))
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(let* ((res (reader socket flags s i end)))
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(apply (lambda (nread from)
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(cond ((zero? nread) ; EOF
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(values
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(let ((result (- i start)))
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(and (not (zero? result)) result))
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(make-socket-address family from)))
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(else (loop (+ i nread) from))))
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res)))))
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(define (receive-message/partial socket len . maybe-flags)
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(let ((flags (:optional maybe-flags 0)))
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(cond ((not (socket? socket))
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(error "receive-message/partial: socket expected ~s" socket))
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((or (not (integer? flags))
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(not (integer? len)))
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(error "receive-message/partial: integer expected ~s ~s" flags len))
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(else
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(let ((s (make-string len)))
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(receive (nread addr)
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(receive-message!/partial socket s 0 len flags)
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(values
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(cond ((not nread) #f) ; EOF
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((= nread len) s)
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(else (substring s 0 nread)))
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addr)))))))
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(define (receive-message!/partial socket s . args)
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(if (not (string? s))
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(error "receive-message!/partial: string expected ~s" s)
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(let-optionals args ((start 0) (end (string-length s)) (flags 0))
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(cond ((not (socket? socket))
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(error "receive-message!/partial: socket expected ~s"
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socket))
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((not (integer? flags))
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(error "receive-message!/partial: integer expected ~s"
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flags))
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(else
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(generic-receive-message!/partial socket
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flags
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s start end
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recv-substring!
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(socket:family socket)))))))
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(define (generic-receive-message!/partial socket flags s start end reader from)
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(if (bogus-substring-spec? s start end)
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(error "Bad substring indices" reader s start end))
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(if (= start end) 0 ; Vacuous request.
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(let loop ()
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(apply (lambda (nread addr)
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(values (and (not (zero? nread)) nread)
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(make-socket-address from addr)))
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(reader socket flags s start end)))))
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(define (recv-substring! socket flags buf start end)
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(let loop ()
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((structure-ref interrupts disable-interrupts!))
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(let ((maybe-size-addr
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(%recv-substring! (socket->fdes socket)
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flags buf start end)))
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(cond (maybe-size-addr
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((structure-ref interrupts
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enable-interrupts!))
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maybe-size-addr)
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(else (wait-for-channel
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(fdport-data:channel
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(fdport-data (socket:inport socket))))
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(loop))))))
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(import-os-error-syscall %recv-substring! (sockfd flags buf start end)
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"recv_substring")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; send syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (send-message socket s . args)
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(let-optionals args ((start 0) (end (string-length s)) (flags 0) (addr #f))
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(cond ((not (socket? socket))
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(error "send-message: socket expected ~s" socket))
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((not (integer? flags))
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(error "send-message: integer expected ~s" flags))
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((not (string? s))
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(error "send-message: string expected ~s" s))
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(else
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(generic-send-message socket flags
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s start end
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send-substring
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(if addr (socket-address:family addr) 0)
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(if addr (socket-address:address addr) #f))))))
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(define (generic-send-message socket flags s start end writer family addr)
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(if (bogus-substring-spec? s start end)
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(error "Bad substring indices"
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socket flags family addr
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s start end writer))
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(let loop ((i start))
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(if (< i end)
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(loop (+ i (writer socket flags s i end family addr))))))
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(define (send-message/partial socket s . args)
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(let-optionals args ((start 0) (end (string-length s)) (flags 0) (addr #f))
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(cond ((not (socket? socket))
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(error "send-message/partial: socket expected ~s" socket))
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((not (integer? flags))
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(error "send-message/partial: integer expected ~s" flags))
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((not (string? s))
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(error "send-message/partial: string expected ~s" s))
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(else
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(generic-send-message/partial socket flags
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s start end
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send-substring
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(if addr (socket-address:family addr) 0)
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(if addr
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(socket-address:address addr)
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#f))))))
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(define (generic-send-message/partial socket flags s start end writer family
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addr)
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(if (bogus-substring-spec? s start end)
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(error "Bad substring indices"
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socket flags family addr
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s start end writer))
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(if (= start end)
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0 ; Vacuous request.
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(writer socket flags s start end family addr)))
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(define (send-substring socket flags buf start end family name)
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(let loop ()
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((structure-ref interrupts disable-interrupts!))
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(cond ((%send-substring (socket->fdes socket) flags buf start end
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family name)
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=> (lambda (nwritten)
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((structure-ref interrupts
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enable-interrupts!))
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nwritten))
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(else (wait-for-channel
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(fdport-data:channel
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(fdport-data (socket:inport socket))))
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(loop)))))
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(import-os-error-syscall
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%send-substring (sockfd flags buf start end family name)
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"send_substring")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; getsockopt syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (socket-option sock level option)
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(cond ((not (socket? sock))
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(error "socket-option: socket expected ~s" sock))
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((or (not (integer? level))(not (integer? option)))
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(error "socket-option: integer expected ~s ~s" level option))
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((boolean-option? option)
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(let ((result (%getsockopt (socket->fdes sock) level option)))
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(not (= result 0))))
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((value-option? option)
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(%getsockopt (socket->fdes sock) level option))
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((linger-option? option)
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(apply (lambda (result/on-off time)
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(if (= result/on-off 0) #f time))
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(%getsockopt-linger (socket->fdes sock) level option)))
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((timeout-option? option)
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(apply (lambda (result/secs usecs)
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(cond ((= result/secs -1)
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(error "socket-option ~s ~s ~s" sock level option))
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(else (+ result/secs (/ usecs 1000)))))
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(%getsockopt-timeout (socket->fdes sock) level option)))
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(else
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"socket-option: unknown option type ~s" option)))
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(import-os-error-syscall %getsockopt (sock level option) "scheme_getsockopt")
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;;; returns (list on-off linger)
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(import-os-error-syscall %getsockopt-linger (sockfd level optname)
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"scheme_getsockopt_linger")
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;;; returns (list secs usecs)
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(import-os-error-syscall %getsockopt-timeout (sockfd level optname)
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"scheme_getsockopt_timeout")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; setsockopt syscall
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (set-socket-option sock level option value)
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(cond ((not (socket? sock))
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(error "set-socket-option: socket expected ~s" sock))
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((or (not (integer? level)) (not (integer? option)))
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(error "set-socket-option: integer expected ~s ~s" level option))
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((boolean-option? option)
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(%setsockopt (socket->fdes sock) level option (if value 1 0)))
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((value-option? option)
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(%setsockopt (socket->fdes sock) level option value))
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((linger-option? option)
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(%setsockopt-linger (socket->fdes sock)
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level option
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(if value 1 0)
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(if value value 0)))
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((timeout-option? option)
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(let ((secs (truncate value)))
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(%setsockopt-timeout (socket->fdes sock) level option
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secs
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(truncate (* (- value secs) 1000)))))
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(else
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"set-socket-option: unknown option type")))
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(import-os-error-syscall %setsockopt (sockfd level optname optval)
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"scheme_setsockopt")
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(import-os-error-syscall %setsockopt-linger
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(sockfd level optname on-off time) "scheme_setsockopt_linger")
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(import-os-error-syscall %setsockopt-timeout
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(sockfd level optname secs usecs) "scheme_setsockopt_timeout")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; socket-option routines
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define (boolean-option? opt)
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(member opt options/boolean))
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(define (value-option? opt)
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(member opt options/value))
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(define (linger-option? opt)
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(member opt options/linger))
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(define (timeout-option? opt)
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(member opt options/timeout))
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; host lookup
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define-record host-info
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name ; Host name
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aliases ; Alternative names
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addresses ; Host addresses
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((disclose hi) ; Make host-info records print like
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(list "host" (host-info:name hi)))) ; #{host clark.lcs.mit.edu}.
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(define-exported-binding "host-info-type" type/host-info)
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(define (host-info arg)
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(cond ((string? arg) (name->host-info arg))
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((socket-address? arg) (address->host-info arg))
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(else (error "host-info: string or socket-address expected ~s" arg))))
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(define (address->host-info name)
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(if (or (not (socket-address? name))
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(not (= (socket-address:family name) address-family/internet)))
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(error "address->host-info: internet address expected ~s" name)
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(let ((res (%host-address->host-info/h-errno
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(socket-address:address name))))
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(if (number? res)
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(error "address->host-info: non-zero herrno" res name)
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res))))
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(import-lambda-definition %host-address->host-info/h-errno (name)
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"scheme_host_address2host_info")
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(define (name->host-info name)
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(if (not (string? name))
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(error "name->host-info: string expected ~s" name)
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(let ((res (%host-name->host-info/h-errno name)))
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(if (number? res)
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(error "name->host-info: non-zero herrno" res name)
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res))))
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(import-lambda-definition %host-name->host-info/h-errno (name)
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"scheme_host_name2host_info")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; network lookup
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define-record network-info
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name ; Network name
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aliases ; Alternative names
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net) ; Network number
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(define-exported-binding "network-info-type" type/network-info)
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(define (network-info arg)
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(cond ((string? arg) (name->network-info arg))
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((socket-address? arg) (car (socket-address:address arg)))
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(else
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(error "network-info: string or socket-address expected ~s" arg))))
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(define (address->network-info addr)
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(if (not (integer? addr))
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(error "address->network-info: integer expected ~s" addr)
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(%net-address->network-info addr)))
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(import-lambda-definition %net-address->network-info (addr)
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"scheme_net_address2net_info")
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(define (name->network-info name)
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(if (not (string? name))
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(error "name->network-info: string expected ~s" name)
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(%net-name->network-info name)))
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|
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(import-lambda-definition %net-name->network-info (name)
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"scheme_net_name2net_info")
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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;;; service lookup
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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(define-record service-info
|
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name ; Service name
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aliases ; Alternative names
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port ; Port number
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protocol) ; Protocol name
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|
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(define-exported-binding "service-info-type" type/service-info)
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|
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(define (service-info . args)
|
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(apply (cond ((string? (car args)) name->service-info)
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((integer? (car args)) port->service-info)
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(else (error "service-info: string or integer expected ~s" args)))
|
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args))
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|
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(define (port->service-info name . maybe-proto)
|
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(let ((proto (:optional maybe-proto "")))
|
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(cond ((not (integer? name))
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(error "port->service-info: integer expected ~s" name))
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((not (string? proto))
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(error "port->service-info: string expected ~s" proto))
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(else
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(%service-port->service-info name (if (equal? "" proto)
|
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#f
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proto))))))
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|
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(import-lambda-definition %service-port->service-info (port proto)
|
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"scheme_serv_port2serv_info")
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|
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(define (name->service-info name . maybe-proto)
|
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(let ((proto (:optional maybe-proto "")))
|
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(cond ((not (string? name))
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(error "name->service-info: integer expected ~s" name))
|
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((not (string? proto))
|
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(error "name->service-info: string expected ~s" proto))
|
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(else
|
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(%service-name->service-info name (if (equal? "" proto)
|
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#f
|
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proto))))))
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|
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(import-lambda-definition %service-name->service-info (name proto)
|
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"scheme_serv_name2serv_info")
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|
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;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
|
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;;; protocol lookup
|
|
;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
|
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(define-record protocol-info
|
|
name ; Protocol name
|
|
aliases ; Alternative names
|
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number) ; Protocol number
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|
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(define-exported-binding "protocol-info-type" type/protocol-info)
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|
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(define (protocol-info arg)
|
|
(cond ((string? arg) (name->protocol-info arg))
|
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((integer? arg) (number->protocol-info arg))
|
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(else (error "protocol-info: string or integer expected ~s" arg))))
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|
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(define (number->protocol-info name)
|
|
(if (not (integer? name))
|
|
(error "number->protocol-info: integer expected ~s" name)
|
|
(%protocol-port->protocol-info name)))
|
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|
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(import-lambda-definition %protocol-port->protocol-info (name)
|
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"scheme_proto_num2proto_info")
|
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|
|
(define (name->protocol-info name)
|
|
(if (not (string? name))
|
|
(error "name->protocol-info: string expected ~s" name)
|
|
(%protocol-name->protocol-info name)))
|
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|
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(import-lambda-definition %protocol-name->protocol-info (name)
|
|
"scheme_proto_name2proto_info")
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|