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