1 ;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10; Package: modlisp -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
5 ;;;; Name: sockets.lisp
6 ;;;; Purpose: Socket functions
7 ;;;; Programmer: Kevin M. Rosenberg with excerpts from portableaserve
8 ;;;; Date Started: Jun 2003
11 ;;;; *************************************************************************
15 (eval-when (:compile-toplevel :load-toplevel :execute)
16 #+sbcl (require :sb-bsd-sockets)
17 #+lispworks (require "comm")
18 #+allegro (require :socket))
22 (defun listen-to-inet-port (&key (port 0) (kind :stream) (reuse nil))
23 "Create, bind and listen to an inet socket on *:PORT.
24 setsockopt SO_REUSEADDR if :reuse is not nil"
25 (let ((socket (make-instance 'sb-bsd-sockets:inet-socket
29 (setf (sb-bsd-sockets:sockopt-reuse-address socket) t))
30 (sb-bsd-sockets:socket-bind
31 socket (sb-bsd-sockets:make-inet-address "0.0.0.0") port)
32 (sb-bsd-sockets:socket-listen socket 15)
35 (defun create-inet-listener (port &key (format :text) (reuse-address t))
36 #+cmu (ext:create-inet-listener port)
38 (socket:make-socket :connect :passive :local-port port :format format
42 (if (or (null port) (integerp port))
44 (error "illegal value for port: ~s" port)))
45 :reuse-address reuse-address)
47 (listen-to-inet-port :port port :reuse reuse-address)
48 #+clisp (ext:socket-server port)
50 (ccl:make-socket :connect :passive :local-port port
51 :reuse-address reuse-address)
52 #-(or allegro clisp cmu sbcl openmcl)
53 (warn "create-inet-listener not supported on this implementation")
56 (defun make-fd-stream (socket &key input output element-type)
58 (sys:make-fd-stream socket :input input :output output
59 :element-type element-type)
61 (sb-bsd-sockets:socket-make-stream socket :input input :output output
62 :element-type element-type)
63 #-(or cmu sbcl) (declare (ignore input output element-type))
64 #-(or cmu sbcl) socket
68 (defun accept-tcp-connection (listener)
69 "Returns (VALUES stream socket)"
71 (let ((sock (socket:accept-connection listener)))
74 (let ((sock (ext:socket-accept listener)))
78 (mp:process-wait-until-fd-usable listener :input)
79 (let ((sock (nth-value 0 (ext:accept-tcp-connection listener))))
80 (values (sys:make-fd-stream sock :input t :output t) sock)))
82 (when (sb-sys:wait-until-fd-usable
83 (sb-bsd-sockets:socket-file-descriptor listener) :input)
84 (let ((sock (sb-bsd-sockets:socket-accept listener)))
86 (sb-bsd-sockets:socket-make-stream
87 sock :element-type 'base-char :input t :output t)
90 (let ((sock (ccl:accept-connection listener :wait t)))
92 #-(or allegro clisp cmu sbcl openmcl)
93 (warn "accept-tcp-connection not supported on this implementation")
97 (defmacro errorset (form display)
101 (declare (ignorable e))
103 (format t "~&Error: ~A~%" e)))))
105 (defun close-passive-socket (socket)
106 #+allegro (close socket)
107 #+clisp (close socket)
108 #+cmu (unix:unix-close socket)
109 #+sbcl (sb-unix:unix-close
110 (sb-bsd-sockets:socket-file-descriptor socket))
111 #+openmcl (close socket)
112 #-(or allegro clisp cmu sbcl openmcl)
113 (warn "close-passive-socket not supported on this implementation")
117 (defun close-active-socket (socket)
120 (defun ipaddr-to-dotted (ipaddr &key values)
121 "Convert from 32-bit integer to dotted string."
122 (declare (type (unsigned-byte 32) ipaddr))
123 (let ((a (logand #xff (ash ipaddr -24)))
124 (b (logand #xff (ash ipaddr -16)))
125 (c (logand #xff (ash ipaddr -8)))
126 (d (logand #xff ipaddr)))
129 (format nil "~d.~d.~d.~d" a b c d))))
131 (defun dotted-to-ipaddr (dotted &key (errorp t))
132 "Convert from dotted string to 32-bit integer."
133 (declare (string dotted))
135 (let ((ll (delimited-string-to-list dotted #\.)))
136 (+ (ash (first ll) 24) (ash (second ll) 16)
137 (ash (third ll) 8) (fourth ll)))
139 (let ((ll (delimited-string-to-list dotted #\.)))
140 (+ (ash (first ll) 24) (ash (second ll) 16)
141 (ash (third ll) 8) (fourth ll))))))
144 (defun ipaddr-to-hostname (ipaddr &key ignore-cache)
146 (warn ":IGNORE-CACHE keyword in IPADDR-TO-HOSTNAME not supported."))
147 (sb-bsd-sockets:host-ent-name
148 (sb-bsd-sockets:get-host-by-address
149 (sb-bsd-sockets:make-inet-address ipaddr))))
152 (defun lookup-hostname (host &key ignore-cache)
154 (warn ":IGNORE-CACHE keyword in LOOKUP-HOSTNAME not supported."))
156 (sb-bsd-sockets:host-ent-address
157 (sb-bsd-sockets:get-host-by-name host))
158 (dotted-to-ipaddr (ipaddr-to-dotted host))))
161 (defun make-active-socket (server port)
162 "Returns (VALUES STREAM SOCKET)"
164 (let ((sock (socket:make-socket :remote-host server
168 (let ((sock (comm:open-tcp-stream server port)))
171 (let ((sock (make-instance 'sb-bsd-sockets:inet-socket
174 (sb-bsd-sockets:socket-connect sock (lookup-hostname server) port)
176 (sb-bsd-sockets:socket-make-stream
177 sock :input t :output t :element-type 'base-char)
180 (let ((sock (ext:connect-to-inet-socket server port)))
182 (sys:make-fd-stream sock :input t :output t :element-type 'base-char)
185 (let ((sock (ccl:make-socket :remote-host server :remote-port port )))
189 (defun ipaddr-array-to-dotted (array)
190 (format nil "~{~D~^.~}" (coerce array 'list))
192 (format nil "~D.~D.~D.~D"
193 (aref 0 array) (aref 1 array) (aref 2 array) (array 3 array)))
195 (defun remote-host (socket)
196 #+allegro (socket:ipaddr-to-dotted (socket:remote-host socket))
197 #+lispworks (nth-value 0 (comm:get-socket-peer-address socket))
198 #+sbcl (ipaddr-array-to-dotted
199 (nth-value 0 (sb-bsd-sockets:socket-peername socket)))
200 #+cmu (nth-value 0 (ext:get-peer-host-and-port socket))
201 #+openmcl (ccl:remote-host socket)