2 * Server-side mailslot management
4 * Copyright (C) 1998 Alexandre Julliard
5 * Copyright (C) 2005 Mike McCormack
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include "wine/port.h"
26 #define WIN32_NO_STATUS
27 #include "wine/unicode.h"
36 #include <sys/types.h>
38 #ifdef HAVE_SYS_IOCTL_H
39 #include <sys/ioctl.h>
41 #ifdef HAVE_SYS_SOCKET_H
42 #include <sys/socket.h>
44 #ifdef HAVE_SYS_FILIO_H
45 #include <sys/filio.h>
60 unsigned int max_msgsize;
65 struct mailslot_device
67 struct object obj; /* object header */
68 struct namespace *mailslots; /* mailslot namespace */
71 /* mailslot functions */
72 static void mailslot_dump( struct object*, int );
73 static struct fd *mailslot_get_fd( struct object * );
74 static void mailslot_destroy( struct object * );
76 static const struct object_ops mailslot_ops =
78 sizeof(struct mailslot), /* size */
79 mailslot_dump, /* dump */
80 default_fd_add_queue, /* add_queue */
81 default_fd_remove_queue, /* remove_queue */
82 default_fd_signaled, /* signaled */
83 no_satisfied, /* satisfied */
84 no_signal, /* signal */
85 mailslot_get_fd, /* get_fd */
86 no_lookup_name, /* lookup_name */
87 no_close_handle, /* close_handle */
88 mailslot_destroy /* destroy */
91 static int mailslot_get_info( struct fd * );
92 static void mailslot_queue_async( struct fd *, void*, void*, void*, int, int );
94 static const struct fd_ops mailslot_fd_ops =
96 default_fd_get_poll_events, /* get_poll_events */
97 default_poll_event, /* poll_event */
99 mailslot_get_info, /* get_file_info */
100 mailslot_queue_async, /* queue_async */
101 default_fd_cancel_async /* cancel_async */
107 struct mailslot *mailslot;
113 static void mail_writer_dump( struct object *obj, int verbose );
114 static struct fd *mail_writer_get_fd( struct object *obj );
115 static void mail_writer_destroy( struct object *obj);
117 static const struct object_ops mail_writer_ops =
119 sizeof(struct mail_writer), /* size */
120 mail_writer_dump, /* dump */
121 no_add_queue, /* add_queue */
122 NULL, /* remove_queue */
124 NULL, /* satisfied */
125 no_signal, /* signal */
126 mail_writer_get_fd, /* get_fd */
127 no_lookup_name, /* lookup_name */
128 no_close_handle, /* close_handle */
129 mail_writer_destroy /* destroy */
132 static int mail_writer_get_info( struct fd *fd );
134 static const struct fd_ops mail_writer_fd_ops =
136 NULL, /* get_poll_events */
137 NULL, /* poll_event */
138 no_flush, /* flush */
139 mail_writer_get_info, /* get_file_info */
140 no_queue_async, /* queue_async */
141 NULL /* cancel_async */
144 static void mailslot_device_dump( struct object *obj, int verbose );
145 static struct object *mailslot_device_lookup_name( struct object *obj, struct unicode_str *name,
147 static void mailslot_device_destroy( struct object *obj );
149 static const struct object_ops mailslot_device_ops =
151 sizeof(struct mailslot_device), /* size */
152 mailslot_device_dump, /* dump */
153 no_add_queue, /* add_queue */
154 NULL, /* remove_queue */
156 no_satisfied, /* satisfied */
157 no_signal, /* signal */
158 no_get_fd, /* get_fd */
159 mailslot_device_lookup_name, /* lookup_name */
160 no_close_handle, /* close_handle */
161 mailslot_device_destroy /* destroy */
164 static void mailslot_destroy( struct object *obj)
166 struct mailslot *mailslot = (struct mailslot *) obj;
168 assert( mailslot->fd );
169 assert( mailslot->write_fd );
171 release_object( mailslot->fd );
172 release_object( mailslot->write_fd );
175 static void mailslot_dump( struct object *obj, int verbose )
177 struct mailslot *mailslot = (struct mailslot *) obj;
179 assert( obj->ops == &mailslot_ops );
180 fprintf( stderr, "Mailslot max_msgsize=%d read_timeout=%d\n",
181 mailslot->max_msgsize, mailslot->read_timeout );
184 static int mailslot_message_count(struct mailslot *mailslot)
188 /* poll the socket to see if there's any messages */
189 pfd.fd = get_unix_fd( mailslot->fd );
192 return (poll( &pfd, 1, 0 ) == 1) ? 1 : 0;
195 static int mailslot_next_msg_size( struct mailslot *mailslot )
200 fd = get_unix_fd( mailslot->fd );
201 ioctl( fd, FIONREAD, &size );
205 static int mailslot_get_info( struct fd *fd )
207 struct mailslot *mailslot = get_fd_user( fd );
208 assert( mailslot->obj.ops == &mailslot_ops );
209 return FD_FLAG_TIMEOUT | FD_FLAG_AVAILABLE;
212 static struct fd *mailslot_get_fd( struct object *obj )
214 struct mailslot *mailslot = (struct mailslot *) obj;
216 return (struct fd *)grab_object( mailslot->fd );
219 static void mailslot_queue_async( struct fd *fd, void *apc, void *user,
220 void *iosb, int type, int count )
222 struct mailslot *mailslot = get_fd_user( fd );
225 assert(mailslot->obj.ops == &mailslot_ops);
227 if (type != ASYNC_TYPE_READ)
229 set_error(STATUS_INVALID_PARAMETER);
233 if (list_empty( &mailslot->writers ) ||
234 !mailslot_message_count( mailslot ))
236 set_error(STATUS_IO_TIMEOUT);
240 if (mailslot->read_timeout != -1) timeout = &mailslot->read_timeout;
242 fd_queue_async_timeout( fd, apc, user, iosb, type, count, timeout );
245 static void mailslot_device_dump( struct object *obj, int verbose )
247 assert( obj->ops == &mailslot_device_ops );
248 fprintf( stderr, "Mail slot device\n" );
251 static struct object *mailslot_device_lookup_name( struct object *obj, struct unicode_str *name,
254 struct mailslot_device *device = (struct mailslot_device*)obj;
255 struct object *found;
257 assert( obj->ops == &mailslot_device_ops );
259 if ((found = find_object( device->mailslots, name, attr | OBJ_CASE_INSENSITIVE )))
265 static void mailslot_device_destroy( struct object *obj )
267 struct mailslot_device *device = (struct mailslot_device*)obj;
268 assert( obj->ops == &mailslot_device_ops );
269 free( device->mailslots );
272 struct mailslot_device *create_mailslot_device( struct directory *root, const struct unicode_str *name )
274 struct mailslot_device *dev;
276 if ((dev = create_named_object_dir( root, name, 0, &mailslot_device_ops )) &&
277 get_error() != STATUS_OBJECT_NAME_EXISTS)
279 if (!(dev->mailslots = create_namespace( 7 )))
281 release_object( dev );
288 static struct mailslot *create_mailslot( struct directory *root,
289 const struct unicode_str *name, unsigned int attr,
290 int max_msgsize, int read_timeout )
293 struct unicode_str new_name;
294 struct mailslot_device *dev;
295 struct mailslot *mailslot;
298 if (!name || !name->len) return alloc_object( &mailslot_ops );
300 if (!(obj = find_object_dir( root, name, attr, &new_name ))) return NULL;
304 if (attr & OBJ_OPENIF && obj->ops == &mailslot_ops)
305 /* it already exists - there can only be one mailslot to read from */
306 set_error( STATUS_OBJECT_NAME_EXISTS );
307 else if (attr & OBJ_OPENIF)
308 set_error( STATUS_OBJECT_TYPE_MISMATCH );
310 set_error( STATUS_OBJECT_NAME_COLLISION );
311 release_object( obj );
315 if (obj->ops != &mailslot_device_ops)
317 set_error( STATUS_OBJECT_TYPE_MISMATCH );
318 release_object( obj );
322 dev = (struct mailslot_device *)obj;
323 mailslot = create_object( dev->mailslots, &mailslot_ops, &new_name, NULL );
324 release_object( dev );
326 if (!mailslot) return NULL;
329 mailslot->write_fd = NULL;
330 mailslot->max_msgsize = max_msgsize;
331 mailslot->read_timeout = read_timeout;
332 list_init( &mailslot->writers );
334 if (!socketpair( PF_UNIX, SOCK_DGRAM, 0, fds ))
336 fcntl( fds[0], F_SETFL, O_NONBLOCK );
337 fcntl( fds[1], F_SETFL, O_NONBLOCK );
338 mailslot->fd = create_anonymous_fd( &mailslot_fd_ops,
339 fds[1], &mailslot->obj );
340 mailslot->write_fd = create_anonymous_fd( &mail_writer_fd_ops,
341 fds[0], &mailslot->obj );
342 if (mailslot->fd && mailslot->write_fd) return mailslot;
344 else file_set_error();
346 release_object( mailslot );
350 static void mail_writer_dump( struct object *obj, int verbose )
352 fprintf( stderr, "Mailslot writer\n" );
355 static void mail_writer_destroy( struct object *obj)
357 struct mail_writer *writer = (struct mail_writer *) obj;
359 list_remove( &writer->entry );
360 release_object( writer->mailslot );
363 static int mail_writer_get_info( struct fd *fd )
368 static struct fd *mail_writer_get_fd( struct object *obj )
370 struct mail_writer *writer = (struct mail_writer *) obj;
372 return (struct fd *)grab_object( writer->mailslot->write_fd );
376 * Readers and writers cannot be mixed.
377 * If there's more than one writer, all writers must open with FILE_SHARE_WRITE
379 static struct mail_writer *create_mail_writer( struct mailslot *mailslot, unsigned int access,
380 unsigned int sharing )
382 struct mail_writer *writer;
384 if (!list_empty( &mailslot->writers ))
386 writer = LIST_ENTRY( list_head(&mailslot->writers), struct mail_writer, entry );
388 if (((access & GENERIC_WRITE) || (writer->access & GENERIC_WRITE)) &&
389 !((sharing & FILE_SHARE_WRITE) && (writer->sharing & FILE_SHARE_WRITE)))
391 set_error( STATUS_SHARING_VIOLATION );
396 writer = alloc_object( &mail_writer_ops );
400 grab_object( mailslot );
401 writer->mailslot = mailslot;
402 writer->access = access;
403 writer->sharing = sharing;
405 list_add_head( &mailslot->writers, &writer->entry );
410 static struct mailslot *get_mailslot_obj( struct process *process, obj_handle_t handle,
411 unsigned int access )
413 return (struct mailslot *)get_handle_obj( process, handle, access, &mailslot_ops );
417 /* create a mailslot */
418 DECL_HANDLER(create_mailslot)
420 struct mailslot *mailslot;
421 struct unicode_str name;
422 struct directory *root = NULL;
425 get_req_unicode_str( &name );
426 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
429 if ((mailslot = create_mailslot( root, &name, req->attributes, req->max_msgsize,
430 req->read_timeout )))
432 reply->handle = alloc_handle( current->process, mailslot,
433 req->access, req->attributes & OBJ_INHERIT );
434 release_object( mailslot );
437 if (root) release_object( root );
441 /* open an existing mailslot */
442 DECL_HANDLER(open_mailslot)
444 struct mailslot *mailslot;
445 struct unicode_str name;
446 struct directory *root = NULL;
449 get_req_unicode_str( &name );
451 if (!(req->sharing & FILE_SHARE_READ))
453 set_error( STATUS_SHARING_VIOLATION );
457 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
459 mailslot = open_object_dir( root, &name, req->attributes, &mailslot_ops );
460 if (root) release_object( root );
464 struct mail_writer *writer;
466 writer = create_mail_writer( mailslot, req->access, req->sharing );
469 reply->handle = alloc_handle( current->process, writer,
470 req->access, req->attributes & OBJ_INHERIT );
471 release_object( writer );
473 release_object( mailslot );
476 set_error( STATUS_NO_SUCH_FILE );
480 /* set mailslot information */
481 DECL_HANDLER(set_mailslot_info)
483 struct mailslot *mailslot = get_mailslot_obj( current->process, req->handle, 0 );
487 if (req->flags & MAILSLOT_SET_READ_TIMEOUT)
488 mailslot->read_timeout = req->read_timeout;
489 reply->max_msgsize = mailslot->max_msgsize;
490 reply->read_timeout = mailslot->read_timeout;
491 reply->msg_count = mailslot_message_count(mailslot);
493 /* get the size of the next message */
494 if (reply->msg_count)
495 reply->next_msgsize = mailslot_next_msg_size(mailslot);
497 reply->next_msgsize = MAILSLOT_NO_MESSAGE;
499 release_object( mailslot );