1 ;;; Gacela, a GNU Guile extension for fast games development
2 ;;; Copyright (C) 2009 by Javier Sancho Fernandez <jsf at jsancho dot org>
4 ;;; This program is free software: you can redistribute it and/or modify
5 ;;; it under the terms of the GNU General Public License as published by
6 ;;; the Free Software Foundation, either version 3 of the License, or
7 ;;; (at your option) any later version.
9 ;;; This program is distributed in the hope that it will be useful,
10 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 ;;; GNU General Public License for more details.
14 ;;; You should have received a copy of the GNU General Public License
15 ;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
18 (define-module (gacela server)
19 #:use-module (ice-9 optargs)
20 #:export (eval-from-client))
23 (define start-server #f)
24 (define check-connections #f)
25 (define clean-closed-connections #f)
26 (define eval-from-clients #f)
27 (define stop-server #f)
29 (let ((server-socket #f) (clients '())
32 (lambda* (#:key (port #f) (pipes #f))
34 (set! server-socket (socket PF_INET SOCK_STREAM 0))
35 (setsockopt server-socket SOL_SOCKET SO_REUSEADDR 1)
36 (bind server-socket AF_INET INADDR_ANY port)
37 (listen server-socket 5))
39 (set! server-pipes pipes)))
40 (cond ((not (game-running?))
44 (set! clean-closed-connections
46 (cond ((null? conns) '())
48 (let* ((cli (car conns)) (sock (car cli)))
49 (cond ((port-closed? sock)
50 (clean-closed-connections (cdr conns)))
52 (cons cli (clean-closed-connections (cdr conns))))))))))
54 (set! check-connections
56 (set! clients (clean-closed-connections clients))
59 (cond ((char-ready? server-socket)
60 (set! clients (cons (accept server-socket) clients)))))
61 (lambda (key . args) #f))))
63 (set! eval-from-clients
66 (eval-from-client (car server-pipes) (cdr server-pipes))))
68 (lambda (cli) (eval-from-client (car cli) (car cli)))
75 (set! server-socket #f)))
76 (for-each (lambda (cli) (close (car cli))) clients)
79 (define (eval-from-client rec-channel send-channel)
80 (cond ((char-ready? rec-channel)
83 (display "leido")(newline)
84 (let ((exp (read rec-channel)))
85 (cond ((eof-object? exp)
88 (let ((result (eval-string exp)))
89 (write (if (eq? result *unspecified*) "" (format #f "~a" result)) send-channel))))))
91 (let ((fmt (string-concatenate (list (cadr args) "~%")))
92 (params (caddr args)))
95 (apply format (cons #f (cons fmt params)))
98 (force-output send-channel))))
101 (define (connect-to-server client-socket hostname port)
102 (connect client-socket AF_INET (car (hostent:addr-list (gethost hostname))) port))