1 ;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Indent-tabs-mode: NIL -*-
3 ;;; socket-methods.lisp --- Various socket methods.
5 ;;; Copyright (C) 2006-2007, Stelian Ionescu <sionescu@common-lisp.net>
7 ;;; This code is free software; you can redistribute it and/or
8 ;;; modify it under the terms of the version 2.1 of
9 ;;; the GNU Lesser General Public License as published by
10 ;;; the Free Software Foundation, as clarified by the
11 ;;; preamble found here:
12 ;;; http://opensource.franz.com/preamble.html
14 ;;; This program is distributed in the hope that it will be useful,
15 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;;; GNU General Public License for more details.
19 ;;; You should have received a copy of the GNU Lesser General
20 ;;; Public License along with this library; if not, write to the
21 ;;; Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
22 ;;; Boston, MA 02110-1301, USA
24 (in-package :net.sockets
)
26 (defvar *socket-type-map
*
27 '(((:ipv4
:stream
:active
:default
) . socket-stream-internet-active
)
28 ((:ipv6
:stream
:active
:default
) . socket-stream-internet-active
)
29 ((:ipv4
:stream
:passive
:default
) . socket-stream-internet-passive
)
30 ((:ipv6
:stream
:passive
:default
) . socket-stream-internet-passive
)
31 ((:local
:stream
:active
:default
) . socket-stream-local-active
)
32 ((:local
:stream
:passive
:default
) . socket-stream-local-passive
)
33 ((:local
:datagram
:active
:default
) . socket-datagram-local-active
)
34 ((:ipv4
:datagram
:active
:default
) . socket-datagram-internet-active
)
35 ((:ipv6
:datagram
:active
:default
) . socket-datagram-internet-active
)))
37 ;;; FIXME: should match :default to whatever protocol is the default.
38 (defun select-socket-type (family type connect protocol
)
39 (or (cdr (assoc (list family type connect protocol
) *socket-type-map
*
41 (error "No socket class found !!")))
43 ;;;; Shared Initialization
45 (defun translate-make-socket-keywords-to-constants (family type protocol
)
46 (let ((sf (ecase family
52 (:datagram sock-dgram
)))
54 ((integerp protocol
) protocol
)
55 ((eql protocol
:default
) 0)
56 (t (lookup-protocol protocol
)))))
59 (defmethod socket-fd ((socket socket
))
62 (defmethod (setf socket-fd
) (fd (socket socket
))
63 (setf (fd-of socket
) fd
))
65 ;;; TODO: we should add some sort of finalizer here to avoid leaking
66 ;;; sockets FDs and buffers. Something along these lines:
68 ;;; (trivial-garbage:finalize socket (lambda () (close socket))))
70 ;;; However SBCL's semantics don't allow this, since that reference to
71 ;;; the socket will prevent it from being garbage collected. So we'd
72 ;;; need to get all necessary information into a closure or something
73 ;;; (foreign pointers, FDs, etc) in order to do that closing.
75 ;;; Changed from SHARED-INITIALIZE to INITIALIZE-INSTANCE. Since it
76 ;;; was breaking CHANGE-CLASS. We don't really want to check those
77 ;;; keywords in REINITIALIZE-INSTANCE or do we?
78 (defmethod initialize-instance :after
((socket socket
)
79 &key file-descriptor family type
82 ;; (when (socket-open-p socket)
84 (with-accessors ((fd fd-of
) (fam socket-family
) (proto socket-protocol
))
86 (setf fd
(or file-descriptor
87 (multiple-value-bind (sf st sp
)
88 (translate-make-socket-keywords-to-constants
94 (defmethod (setf external-format-of
) (external-format (socket passive-socket
))
95 (setf (slot-value socket
'external-format
)
96 (babel:ensure-external-format external-format
)))
98 (defmethod initialize-instance :after
((socket passive-socket
)
100 (setf (external-format-of socket
) external-format
))
102 (defmethod socket-type ((socket stream-socket
))
105 (defmethod socket-type ((socket datagram-socket
))
110 (defun sock-fam (socket)
111 (ecase (socket-family socket
)
115 (defmethod print-object ((socket socket-stream-internet-active
) stream
)
116 (print-unreadable-object (socket stream
:identity t
)
117 (format stream
"active ~A stream socket" (sock-fam socket
))
118 (if (socket-connected-p socket
)
119 (multiple-value-bind (addr port
) (remote-name socket
)
120 (format stream
" connected to ~A/~A"
121 (address-to-string addr
) port
))
122 (format stream
", ~:[closed~;unconnected~]" (fd-of socket
)))))
124 (defmethod print-object ((socket socket-stream-internet-passive
) stream
)
125 (print-unreadable-object (socket stream
:identity t
)
126 (format stream
"passive ~A stream socket" (sock-fam socket
))
127 (if (socket-bound-p socket
)
128 (multiple-value-bind (addr port
) (local-name socket
)
129 (format stream
" ~:[bound to~;waiting @~] ~A/~A"
130 (socket-listening-p socket
)
131 (address-to-string addr
) port
))
132 (format stream
", ~:[closed~;unbound~]" (fd-of socket
)))))
134 (defmethod print-object ((socket socket-stream-local-active
) stream
)
135 (print-unreadable-object (socket stream
:identity t
)
136 (format stream
"active local stream socket")
137 (if (socket-connected-p socket
)
138 (format stream
" connected to ~S"
139 (address-to-string (remote-address socket
)))
140 (format stream
", ~:[closed~;unconnected~]" (fd-of socket
)))))
142 (defmethod print-object ((socket socket-stream-local-passive
) stream
)
143 (print-unreadable-object (socket stream
:identity t
)
144 (format stream
"passive local stream socket")
145 (if (socket-bound-p socket
)
146 (format stream
" ~:[bound to~;waiting @~] ~S"
147 (socket-listening-p socket
)
148 (address-to-string (local-address socket
)))
149 (format stream
", ~:[closed~;unbound~]" (fd-of socket
)))))
151 (defmethod print-object ((socket socket-datagram-local-active
) stream
)
152 (print-unreadable-object (socket stream
:identity t
)
153 (format stream
"local datagram socket")
154 (if (socket-connected-p socket
)
155 (format stream
" connected to ~S"
156 (address-to-string (remote-address socket
)))
158 (format stream
" waiting @ ~S" (address-to-string (local-address socket
)))
159 (format stream
", closed" )))))
161 (defmethod print-object ((socket socket-datagram-internet-active
) stream
)
162 (print-unreadable-object (socket stream
:identity t
)
163 (format stream
"~A datagram socket" (sock-fam socket
))
164 (if (socket-connected-p socket
)
165 (multiple-value-bind (addr port
) (remote-name socket
)
166 (format stream
" connected to ~A/~A"
167 (address-to-string addr
) port
))
169 (multiple-value-bind (addr port
) (local-name socket
)
170 (format stream
" waiting @ ~A/~A"
171 (address-to-string addr
) port
))
172 (format stream
", closed" )))))
176 (defmethod close :around
((socket socket
) &key abort
)
177 (declare (ignore abort
))
180 (with-socket-error-filter
181 (nix:close
(fd-of socket
))))
182 (setf (fd-of socket
) nil
183 (slot-value socket
'bound
) nil
)
186 (defmethod close :around
((socket passive-socket
) &key abort
)
187 (declare (ignore abort
))
189 (setf (slot-value socket
'listening
) nil
)
192 (defmethod close ((socket socket
) &key abort
)
193 (declare (ignore socket abort
)))
195 (defmethod socket-open-p ((socket socket
))
198 (with-foreign-object (ss 'sockaddr-storage
)
199 (bzero ss size-of-sockaddr-storage
)
200 (with-socklen (size size-of-sockaddr-storage
)
201 (getsockname (fd-of socket
) ss size
)
204 #+freebsd
(nix:econnreset
() nil
))))
208 (defmethod local-name ((socket socket
))
209 (with-foreign-object (ss 'sockaddr-storage
)
210 (bzero ss size-of-sockaddr-storage
)
211 (with-socklen (size size-of-sockaddr-storage
)
212 (getsockname (fd-of socket
) ss size
)
213 (sockaddr-storage->sockaddr ss
))))
215 (defmethod local-address ((socket socket
))
216 (nth-value 0 (local-name socket
)))
218 (defmethod local-port ((socket internet-socket
))
219 (nth-value 1 (local-name socket
)))
223 (defmethod remote-name ((socket socket
))
224 (with-foreign-object (ss 'sockaddr-storage
)
225 (bzero ss size-of-sockaddr-storage
)
226 (with-socklen (size size-of-sockaddr-storage
)
227 (getpeername (fd-of socket
) ss size
)
228 (sockaddr-storage->sockaddr ss
))))
230 (defmethod remote-address ((socket socket
))
231 (nth-value 0 (remote-name socket
)))
233 (defmethod remote-port ((socket internet-socket
))
234 (nth-value 1 (remote-name socket
)))
238 (defmethod bind-address :before
((socket internet-socket
) address
239 &key
(reuse-address t
))
240 (declare (ignore address
))
242 (set-socket-option socket
:reuse-address
:value t
)))
244 (defun bind-ipv4-address (fd address port
)
245 (with-sockaddr-in (sin address port
)
246 (bind fd sin size-of-sockaddr-in
)))
248 (defun bind-ipv6-address (fd address port
)
249 (with-sockaddr-in6 (sin6 address port
)
250 (bind fd sin6 size-of-sockaddr-in6
)))
252 (defmethod bind-address ((socket internet-socket
) (address ipv4-address
)
254 (if (eql (socket-family socket
) :ipv6
)
255 (bind-ipv6-address (fd-of socket
)
256 (map-ipv4-vector-to-ipv6 (address-name address
))
258 (bind-ipv4-address (fd-of socket
) (address-name address
) port
))
261 (defmethod bind-address ((socket internet-socket
) (address ipv6-address
)
263 (bind-ipv6-address (fd-of socket
) (address-name address
) port
)
266 (defmethod bind-address ((socket local-socket
) (address local-address
) &key
)
267 (with-sockaddr-un (sun (address-name address
))
268 (bind (fd-of socket
) sun size-of-sockaddr-un
))
271 (defmethod bind-address :after
((socket socket
) (address address
) &key
)
272 (setf (slot-value socket
'bound
) t
))
276 (defmethod socket-listen ((socket passive-socket
) &key backlog
)
277 (unless backlog
(setf backlog
(min *default-backlog-size
*
278 +max-backlog-size
+)))
279 (check-type backlog unsigned-byte
"a non-negative integer")
280 (listen (fd-of socket
) backlog
)
281 (setf (slot-value socket
'listening
) t
)
284 (defmethod socket-listen ((socket active-socket
) &key backlog
)
285 (declare (ignore backlog
))
286 (error "You can't listen on active sockets."))
290 (defmethod accept-connection ((socket active-socket
) &key external-format
)
291 (declare (ignore external-format
))
292 (error "You can't accept connections on active sockets."))
294 (defmethod accept-connection ((socket passive-socket
) &key external-format
)
295 (flet ((make-client-socket (fd)
296 (make-instance (active-class socket
)
297 :external-format
(or external-format
298 (external-format-of socket
))
299 :file-descriptor fd
)))
300 (with-foreign-object (ss 'sockaddr-storage
)
301 (bzero ss size-of-sockaddr-storage
)
302 (with-socklen (size size-of-sockaddr-storage
)
304 (make-client-socket (accept (fd-of socket
) ss size
))
305 (nix:ewouldblock
()))))))
310 (defmethod connect :before
((socket active-socket
) sockaddr
&key
)
311 (declare (ignore sockaddr
))
312 (set-socket-option socket
:no-sigpipe
:value t
))
314 (defun ipv4-connect (fd address port
)
315 (with-sockaddr-in (sin address port
)
316 (%connect fd sin size-of-sockaddr-in
)))
318 (defun ipv6-connect (fd address port
)
319 (with-sockaddr-in6 (sin6 address port
)
320 (%connect fd sin6 size-of-sockaddr-in6
)))
322 (defmethod connect ((socket internet-socket
) (address ipv4-address
)
324 (if (eql (socket-family socket
) :ipv6
)
325 (ipv6-connect (fd-of socket
)
326 (map-ipv4-vector-to-ipv6 (address-name address
))
328 (ipv4-connect (fd-of socket
) (address-name address
) port
))
331 (defmethod connect ((socket internet-socket
) (address ipv6-address
)
333 (ipv6-connect (fd-of socket
) (address-name address
) port
)
336 (defmethod connect ((socket local-socket
) (address local-address
) &key
)
337 (with-sockaddr-un (sun (address-name address
))
338 (%connect
(fd-of socket
) sun size-of-sockaddr-un
))
341 (defmethod connect ((socket passive-socket
) address
&key
)
342 (declare (ignore address
))
343 (error "You cannot connect passive sockets."))
345 (defmethod socket-connected-p ((socket socket
))
348 (with-foreign-object (ss 'sockaddr-storage
)
349 (bzero ss size-of-sockaddr-storage
)
350 (with-socklen (size size-of-sockaddr-storage
)
351 (getpeername (fd-of socket
) ss size
)
353 (socket-not-connected-error () nil
))))
357 (defmethod shutdown ((socket active-socket
) direction
)
358 (check-type direction
(member :read
:write
:read-write
)
359 "valid direction specifier")
360 (%shutdown
(fd-of socket
)
364 (:read-write shut-rdwr
)))
367 (defmethod shutdown ((socket passive-socket
) direction
)
368 (declare (ignore direction
))
369 (error "You cannot shut down passive sockets."))
373 (eval-when (:compile-toplevel
:load-toplevel
:execute
)
374 (defun compute-flags (flags args
)
375 (loop :with flag-combination
:= 0
376 :for cons
:on args
:by
#'cddr
377 :for flag
:= (car cons
)
378 :for val
:= (cadr cons
)
379 :for const
:= (cdr (assoc flag flags
))
381 (when (not (constantp val
)) (return-from compute-flags
))
382 (setf flag-combination
(logior flag-combination const
))
383 :finally
(return flag-combination
)))
385 (defmacro define-socket-flag
(place name value platform
)
386 (let ((val (cond ((or (not platform
)
387 (featurep platform
)) value
)
388 ((not (featurep platform
)) 0))))
389 `(push (cons ,name
,val
) ,place
))))
391 (eval-when (:compile-toplevel
:load-toplevel
:execute
)
392 (defparameter *sendmsg-flags
* nil
)
394 (defmacro define-sendmsg-flags
(&rest forms
)
396 (destructuring-bind (name value
&optional platform
) form
397 `(define-socket-flag *sendmsg-flags
* ,name
,value
,platform
))))
399 ,@(mapcar #'dflag forms
))))
401 (define-sendmsg-flags
402 (:end-of-record msg-eor
(:not
:windows
))
403 (:dont-route msg-dontroute
)
404 (:dont-wait msg-dontwait
(:not
:windows
))
405 (:no-signal msg-nosignal
(:not
(:or
:darwin
:windows
)))
406 (:out-of-band msg-oob
)
407 (:more msg-more
:linux
)
408 (:confirm msg-confirm
:linux
)))
410 (defun %normalize-send-buffer
(buff start end ef
)
411 (check-bounds buff start end
)
413 (ub8-sarray (values buff start
(- end start
)))
414 (ub8-vector (values (coerce buff
'ub8-sarray
)
415 start
(- end start
)))
416 (string (values (%to-octets buff ef start end
)
418 (vector (values (coerce buff
'ub8-sarray
)
419 start
(- end start
)))))
421 (defun %socket-send
(buffer socket start end remote-address remote-port flags
)
422 (when (typep socket
'passive-socket
)
423 (error "You cannot send data on a passive socket."))
424 (check-type start unsigned-byte
"a non-negative unsigned integer")
425 (check-type end
(or unsigned-byte null
) "a non-negative unsigned integer or NIL")
426 (check-type remote-address
(or address null
) "a network address or NIL")
427 (check-type remote-port
(unsigned-byte 16) "a valid IP port number")
428 (when (and (ipv4-address-p remote-address
)
429 (eq (socket-family socket
) :ipv6
))
430 (setf remote-address
(map-ipv4-address-to-ipv6 remote-address
)))
431 (multiple-value-bind (buff start-offset bufflen
)
432 (%normalize-send-buffer buffer start end
(external-format-of socket
))
433 (with-foreign-object (ss 'sockaddr-storage
)
434 (bzero ss size-of-sockaddr-storage
)
436 (sockaddr->sockaddr-storage ss remote-address remote-port
))
437 (with-pointer-to-vector-data (buff-sap buff
)
438 (incf-pointer buff-sap start-offset
)
439 (sendto (fd-of socket
) buff-sap bufflen flags
440 (if remote-address ss
(null-pointer))
441 (if remote-address size-of-sockaddr-storage
0))))))
443 (defmethod socket-send ((buffer array
) (socket active-socket
) &rest args
444 &key
(start 0) end remote-address
(remote-port 0) &allow-other-keys
)
445 (%socket-send buffer socket start end remote-address remote-port
446 (compute-flags *sendmsg-flags
* args
)))
448 (define-compiler-macro socket-send
(&whole form buffer socket
&rest args
449 &key
(start 0) end remote-address
(remote-port 0)
451 (let ((flags (compute-flags *sendmsg-flags
* args
)))
452 (cond (flags `(%socket-send
,buffer
,socket
,start
,end
453 ,remote-address
,remote-port
,flags
))
458 (eval-when (:compile-toplevel
:load-toplevel
:execute
)
459 (defparameter *recvfrom-flags
* nil
)
461 (defmacro define-recvfrom-flags
(&rest forms
)
463 (destructuring-bind (name value
&optional platform
) form
464 `(define-socket-flag *recvfrom-flags
* ,name
,value
,platform
))))
466 ,@(mapcar #'dflag forms
))))
468 (define-recvfrom-flags
469 (:out-of-band msg-oob
)
471 (:wait-all msg-waitall
(:not
:windows
))
472 (:dont-wait msg-dontwait
(:not
:windows
))
473 (:no-signal msg-nosignal
(:not
(:or
:darwin
:windows
)))))
475 (defun %normalize-receive-buffer
(buff start end
)
476 (check-bounds buff start end
)
478 ((simple-array ub8
(*)) (values buff start
(- end start
)))))
480 (defun %socket-receive-bytes
(buffer ss fd flags start end
)
481 (multiple-value-bind (buff start-offset bufflen
)
482 (%normalize-receive-buffer buffer start end
)
483 (with-socklen (size size-of-sockaddr-storage
)
484 (bzero ss size-of-sockaddr-storage
)
485 (with-pointer-to-vector-data (buff-sap buff
)
486 (incf-pointer buff-sap start-offset
)
487 (recvfrom fd buff-sap bufflen flags ss size
)))))
489 (declaim (inline %socket-receive-stream-socket
))
490 (defun %socket-receive-stream-socket
(buffer socket start end flags
)
491 (with-foreign-object (ss 'sockaddr-storage
)
492 (let ((bytes-received (%socket-receive-bytes buffer ss
(fd-of socket
) flags
494 (values buffer bytes-received
))))
496 (declaim (inline %socket-receive-datagram-socket
))
497 (defun %socket-receive-datagram-socket
(buffer socket start end flags
)
498 (with-foreign-object (ss 'sockaddr-storage
)
499 (let ((bytes-received (%socket-receive-bytes buffer ss
(fd-of socket
) flags
501 (multiple-value-bind (remote-address remote-port
)
502 (sockaddr-storage->sockaddr ss
)
503 (values buffer bytes-received remote-address remote-port
)))))
505 (defun %socket-receive
(buffer socket start end flags
)
506 (when (typep socket
'passive-socket
)
507 (error "You cannot receive data from a passive socket."))
509 (stream-socket (%socket-receive-stream-socket
510 buffer socket start end flags
))
511 (datagram-socket (%socket-receive-datagram-socket
512 buffer socket start end flags
))))
514 (defmethod socket-receive ((buffer array
) (socket active-socket
)
515 &rest args
&key
(start 0) end
&allow-other-keys
)
516 (%socket-receive buffer socket start end
517 (compute-flags *recvfrom-flags
* args
)))
519 (define-compiler-macro socket-receive
(&whole form buffer socket
&rest args
520 &key
(start 0) end
&allow-other-keys
)
521 (let ((flags (compute-flags *recvfrom-flags
* args
)))
522 (cond (flags `(%socket-receive
,buffer
,socket
,start
,end
,flags
))
525 ;;;; Datagram Sockets
527 (defmethod disconnect :before
((socket active-socket
))
528 (unless (typep socket
'datagram-socket
)
529 (error "You can only disconnect active datagram sockets.")))
531 (defmethod disconnect ((socket datagram-socket
))
532 (with-foreign-object (sin 'sockaddr-in
)
533 (bzero sin size-of-sockaddr-in
)
534 (setf (foreign-slot-value sin
'sockaddr-in
'addr
) af-unspec
)
535 (%connect
(fd-of socket
) sin size-of-sockaddr-in
)))