3 (defparameter *version* "0.0.1")
9 (defvar *default-empire-server* "localhost")
10 (defvar *default-empire-server-port* 6665)
12 (defclass connection ()
23 :initform "Unknown server")
27 :initform *default-empire-server-port*)
31 :documentation "Slot to store socket (for internal use only).")
34 :accessor network-stream
35 :documentation "Stream used to talk to the empire server.")
37 :initarg :logging-stream
38 :accessor logging-stream
40 :documentation "Messages coming back from the server is sent to
43 :accessor connection-handler
45 :documentation "Handler function for incoming messages")))
47 (defun make-connection (&key (user nil)
49 (server-name *default-empire-server*)
50 (server-port *default-empire-server-port*)
54 (make-instance 'connection
57 :server-name server-name
58 :server-port server-port
60 :stream network-stream
61 :logging-stream logging-stream))
64 (defun connect (&key (user nil)
66 (server-name *default-empire-server*)
67 (server-port *default-empire-server-port*)
68 (logging-stream *standard-output*))
69 "Connect to server and return a connection object."
70 (let* ((socket (usocket:socket-connect server-name server-port))
71 (stream (usocket:socket-stream socket))
72 (connection (make-connection :user user
75 :network-stream stream
76 :logging-stream logging-stream
77 :server-name server-name
78 :server-port server-port))
79 (handler (spawn-with-name (format nil "empire-handler-~a" user)
80 #'handle-connection connection)))
81 (setf (connection-handler connection) handler)
85 (defgeneric quit (connection))
86 (defgeneric handle-connection (connection))
87 (defgeneric read-message (connection))
88 (defgeneric send-message (connection message))
90 (defparameter +C_CMDOK+ "0")
91 (defparameter +C_DATA+ "1")
92 (defparameter +C_INIT+ "2")
93 (defparameter +C_EXIT+ "3")
94 (defparameter +C_FLUSH+ "4")
95 (defparameter +C_NOECHO+ "5")
96 (defparameter +C_PROMPT+ "6")
97 (defparameter +C_ABORT+ "7")
98 (defparameter +C_REDIR+ "8")
99 (defparameter +C_PIPE+ "9")
100 (defparameter +C_CMDERR+ "a")
101 (defparameter +C_BADCMD+ "b")
102 (defparameter +C_EXECUTE+ "c")
103 (defparameter +C_FLASH+ "d")
104 (defparameter +C_INFORM+ "e")
106 (defgeneric init-mode (connection message))
107 (defmethod init-mode ((c connection) message)
108 (declare (ignorable message))
111 (defvar *line-type-dispatch*
112 (list `(,+C_INIT+ . init-mode)))
114 (defun parse-server-line (line)
115 (let* ((first-space-index
116 (loop for i from 0 below (length line)
117 if (eq (char line i) #\Space)
119 (message-type (subseq line 0 first-space-index))
120 (message (subseq line (+ first-space-index 1))))
121 (values message message-type)))
123 (defmethod handle-connection ((c connection))
124 (loop while (read-message c)))
126 (defun lookup-handler (message-type)
127 (cdr (assoc message-type *line-type-dispatch* :test 'string=)))
129 (defmethod read-message ((c connection))
130 (let* ((s (network-stream c))
131 (log (logging-stream c))
132 (line (read-line s)))
133 (format log "< ~a~%" line)
134 (multiple-value-bind (message type) (parse-server-line line)
135 (let ((handler (lookup-handler type)))
136 (funcall handler c message)))
139 (defmethod send-message ((c connection) message)
140 (let ((s (network-stream c))
141 (log (logging-stream c)))
142 (format log "< ~a~%" message)
143 (write-sequence message s)
148 (defgeneric play (connection))
149 (defmethod play ((c connection))
150 (with-slots (user password) c
151 (send-message c (format nil "play FIXME ~a ~a" user password))))
153 (defmethod quit ((c connection))
154 (usocket:socket-close (socket c)))
158 (defvar *l1* "2 Empire server ready")
159 ;; (parse-server-line *l1*)