#:use-module (8sync agenda)
#:use-module (ice-9 format)
#:use-module (ice-9 match)
+ #:use-module (ice-9 rdelim)
#:use-module (oop goops)
#:export (;; Should we be exporting these?
((send-to-client actor message client data)
(nm-send-to-client-id actor client data)))))
-(define-method (nm-close-everything (nm <network-manager>) remove-from-agenda)
- "Shut it down!"
- ;; close all clients
- (hash-for-each
- (lambda (_ client)
- (close client)
- (if remove-from-agenda
- (8sync-port-remove client)))
- (nm-clients nm))
- ;; reset the clients list
- (set! (nm-clients) (make-hash-table))
- ;; close the server
- (close (nm-server-socket nm))
- (if remove-from-agenda
- (8sync-port-remove (nm-server-socket nm))))
+;;; TODO: We should provide something like this, but this isn't used currently,
+;;; and uses old deprecated code (the 8sync-port-remove stuff).
+;; (define-method (nm-close-everything (nm <network-manager>) remove-from-agenda)
+;; "Shut it down!"
+;; ;; close all clients
+;; (hash-for-each
+;; (lambda (_ client)
+;; (close client)
+;; (if remove-from-agenda
+;; (8sync-port-remove client)))
+;; (nm-clients nm))
+;; ;; reset the clients list
+;; (set! (nm-clients) (make-hash-table))
+;; ;; close the server
+;; (close (nm-server-socket nm))
+;; (if remove-from-agenda
+;; (8sync-port-remove (nm-server-socket nm))))
;; Maximum number of backlogged connections when we listen
(define %maximum-backlog-conns 128) ; same as SOMAXCONN on Linux 2.X,
(define (nm-install-socket nm server port)
"Install socket on SERVER with PORT"
- (let ((s (socket PF_INET ; ipv4
- SOCK_STREAM ; two-way connection-based byte stream
- 0))
- (addr (if server
- (inet-pton AF_INET server)
- INADDR_LOOPBACK)))
- ;; Totally mimed from the Guile manual. Not sure if we need this, but:
- ;; http://www.unixguide.net/network/socketfaq/4.5.shtml
- (setsockopt s SOL_SOCKET SO_REUSEADDR 1) ; reuse port even if port is busy
- ;; Connecting to a non-specific address:
- ;; (bind s AF_INET INADDR_ANY port)
- ;; Should this be an option? Guess I don't know why we'd need it
- ;; @@: If we wanted to support listening on a particular hostname,
- ;; could see 8sync's irc.scm...
- (bind s AF_INET addr port)
- ;; Listen to connections
- (listen s %maximum-backlog-conns)
-
- ;; Throw a system-error rather than block on an (accept)
- ;; that has nothing to do
- (fcntl s F_SETFL
- (logior O_NONBLOCK
- (fcntl s F_GETFL)))
-
- ;; @@: This is used in Guile's http server under the commit:
- ;; * module/web/server/http.scm (http-open): Ignore SIGPIPE. Keeps the
- ;; server from dying in some circumstances.
- ;; (sigaction SIGPIPE SIG_IGN)
- ;; Will this break other things that use pipes for us though?
-
- (slot-set! nm 'server-socket s)
-
- (format #t "Listening for clients in pid: ~s\n" (getpid))
- (8sync-port s #:read (lambda (s) (nm-new-client nm s)))
- ;; TODO: set up periodic close of idle connections?
- ))
-
-(define (nm-new-client nm s)
+ (define s
+ (socket PF_INET ; ipv4
+ SOCK_STREAM ; two-way connection-based byte stream
+ 0))
+ (define addr
+ (if server
+ (inet-pton AF_INET server)
+ INADDR_LOOPBACK))
+
+ ;; Totally mimed from the Guile manual. Not sure if we need this, but:
+ ;; http://www.unixguide.net/network/socketfaq/4.5.shtml
+ (setsockopt s SOL_SOCKET SO_REUSEADDR 1) ; reuse port even if port is busy
+ ;; Connecting to a non-specific address:
+ ;; (bind s AF_INET INADDR_ANY port)
+ ;; Should this be an option? Guess I don't know why we'd need it
+ ;; @@: If we wanted to support listening on a particular hostname,
+ ;; could see 8sync's irc.scm...
+ (bind s AF_INET addr port)
+ ;; Listen to connections
+ (listen s %maximum-backlog-conns)
+
+ ;; Make port non-blocking
+ (fcntl s F_SETFL (logior O_NONBLOCK (fcntl s F_GETFL)))
+
+ ;; @@: This is used in Guile's http server under the commit:
+ ;; * module/web/server/http.scm (http-open): Ignore SIGPIPE. Keeps the
+ ;; server from dying in some circumstances.
+ ;; (sigaction SIGPIPE SIG_IGN)
+ ;; Will this break other things that use pipes for us though?
+
+ (slot-set! nm 'server-socket s)
+
+ (format #t "Listening for clients in pid: ~s\n" (getpid))
+
+ ;; TODO: set up periodic close of idle connections?
+ (let loop ()
+ ;; (yield) ;; @@: Do we need this?
+ (define client-connection (accept s))
+ (8sync (nm-new-client nm s client-connection))
+ (loop)))
+
+(define (nm-new-client nm s client-connection)
"Handle new client coming in to socket S"
- (let* ((client-connection (accept s))
- (client-details (cdr client-connection))
- (client (car client-connection)))
- (format #t "New client: ~s\n" client-details)
- (format #t "Client address: ~s\n"
- (gethostbyaddr
- (sockaddr:addr client-details)))
-
- (let ((client-id (big-random-number)))
- (hash-set! (nm-clients nm) client-id client)
- ;; @@: Do we need an 8sync-port-wait here?
- ;; Is such a thing even possible? :\
- (8sync-port client #:read (nm-make-client-receive nm client-id))
- (<- nm (nm-send-input-to nm) 'new-client #:client client-id))))
-
-(define (nm-make-client-receive nm client-id)
+ (define client-details (cdr client-connection))
+ (define client (car client-connection))
+ (define client-id (big-random-number))
+ (format #t "New client: ~s\n" client-details)
+ (format #t "Client address: ~s\n"
+ (gethostbyaddr
+ (sockaddr:addr client-details)))
+ (fcntl client F_SETFL (logior O_NONBLOCK (fcntl client F_GETFL)))
+ (hash-set! (nm-clients nm) client-id client)
+ (<- nm (nm-send-input-to nm) 'new-client #:client client-id)
+ (nm-client-receive-loop nm client client-id))
+
+(define (nm-client-receive-loop nm client client-id)
"Make a method to receive client data"
- (let ((buffer '()))
- (define (reset-buffer)
- (set! buffer '()))
- (define (should-read-char client)
- (and (not (port-closed? client))
- (char-ready? client)
- (not (eof-object? (peek-char client)))))
- (define (receive-handler client)
- (while (should-read-char client)
- (set! buffer (cons (read-char client) buffer))
- (match buffer
- (;; @@: Do we need the "char?"
- (#\newline #\return (? char? line-chars) ...)
- (let ((ready-line (list->string (reverse line-chars))))
- ;; reset buffer
- (set! buffer '())
- ;; run it
- (nm-handle-line nm client client-id ready-line)))
- (_ #f)))
- ;; Shut things down on closed port or EOF object
- (cond
- ((port-closed? client)
- (nm-handle-port-closed nm client client-id))
- ((and (char-ready? client)
- (eof-object? (peek-char client)))
- (nm-handle-port-eof nm client client-id))))
- receive-handler))
+ (define (loop)
+ (define line (string-trim-right (read-line client) #\return))
+ (nm-handle-line nm client client-id line)
+ (cond
+ ;; The port's been closed for some reason, so stop looping
+ ((port-closed? client)
+ (nm-handle-port-closed nm client client-id))
+ ;; We've reached the EOF object, which means we should close
+ ;; the port ourselves and stop looping
+ ((eof-object? (peek-char client))
+ (nm-handle-port-eof nm client client-id))
+ ;; Otherwise, let's read till the next line!
+ (else (loop))))
+ (loop))
(define (nm-handle-port-closed nm client client-id)
"Handle a closed port"
(format #t "DEBUG: handled closed port ~x\n" client-id)
- (8sync-port-remove client)
(hash-remove! (nm-clients nm) client-id)
(<- nm (nm-send-input-to nm) 'client-closed #:client client-id))
(define-method (nm-handle-port-eof nm client client-id)
"Handle seeing an EOF on port"
(format #t "DEBUG: handled eof-object on port ~x\n" client-id)
- (close client)
- (8sync-port-remove client)
+ (close client)
(hash-remove! (nm-clients nm) client-id)
(<- nm (nm-send-input-to nm) 'client-closed #:client client-id))
projects / mudsync.git / commitdiff