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 :default :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)
118 #+sbcl (sb-bsd-sockets:socket-close socket)
119 #-sbcl (close socket))
121 (defun ipaddr-to-dotted (ipaddr &key values)
122 "Convert from 32-bit integer to dotted string."
123 (declare (type (unsigned-byte 32) ipaddr))
124 (let ((a (logand #xff (ash ipaddr -24)))
125 (b (logand #xff (ash ipaddr -16)))
126 (c (logand #xff (ash ipaddr -8)))
127 (d (logand #xff ipaddr)))
130 (format nil "~d.~d.~d.~d" a b c d))))
132 (defun dotted-to-ipaddr (dotted &key (errorp t))
133 "Convert from dotted string to 32-bit integer."
134 (declare (string dotted))
136 (let ((ll (delimited-string-to-list dotted #\.)))
137 (+ (ash (parse-integer (first ll)) 24)
138 (ash (parse-integer (second ll)) 16)
139 (ash (parse-integer (third ll)) 8)
140 (parse-integer (fourth ll))))
142 (let ((ll (delimited-string-to-list dotted #\.)))
143 (+ (ash (parse-integer (first ll)) 24)
144 (ash (parse-integer (second ll)) 16)
145 (ash (parse-integer (third ll)) 8)
146 (parse-integer (fourth ll)))))))
149 (defun ipaddr-to-hostname (ipaddr &key ignore-cache)
151 (warn ":IGNORE-CACHE keyword in IPADDR-TO-HOSTNAME not supported."))
152 (sb-bsd-sockets:host-ent-name
153 (sb-bsd-sockets:get-host-by-address
154 (sb-bsd-sockets:make-inet-address ipaddr))))
157 (defun lookup-hostname (host &key ignore-cache)
159 (warn ":IGNORE-CACHE keyword in LOOKUP-HOSTNAME not supported."))
161 (sb-bsd-sockets:host-ent-address
162 (sb-bsd-sockets:get-host-by-name host))
163 (dotted-to-ipaddr (ipaddr-to-dotted host))))
166 (defun make-active-socket (server port)
167 "Returns (VALUES STREAM SOCKET)"
169 (let ((sock (socket:make-socket :remote-host server
173 (let ((sock (comm:open-tcp-stream server port)))
176 (let ((sock (make-instance 'sb-bsd-sockets:inet-socket
179 (sb-bsd-sockets:socket-connect sock (lookup-hostname server) port)
181 (sb-bsd-sockets:socket-make-stream
182 sock :input t :output t :element-type :default)
185 (let ((sock (ext:connect-to-inet-socket server port)))
187 (sys:make-fd-stream sock :input t :output t :element-type 'base-char)
190 (let ((sock (ccl:make-socket :remote-host server :remote-port port )))
194 (defun ipaddr-array-to-dotted (array)
195 (format nil "~{~D~^.~}" (coerce array 'list))
197 (format nil "~D.~D.~D.~D"
198 (aref 0 array) (aref 1 array) (aref 2 array) (array 3 array)))
200 (defun remote-host (socket)
201 #+allegro (socket:ipaddr-to-dotted (socket:remote-host socket))
202 #+lispworks (nth-value 0 (comm:get-socket-peer-address socket))
203 #+sbcl (ipaddr-array-to-dotted
204 (nth-value 0 (sb-bsd-sockets:socket-peername socket)))
205 #+cmu (nth-value 0 (ext:get-peer-host-and-port socket))
206 #+openmcl (ccl:remote-host socket)