1 /*
2 * Server-side mailslot management
3 *
4 * Copyright (C) 1998 Alexandre Julliard
5 * Copyright (C) 2005 Mike McCormack
6 *
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.
11 *
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.
16 *
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 *
21 */
22
23 #include "config.h"
24 #include "wine/port.h"
25 #include "ntstatus.h"
26 #define WIN32_NO_STATUS
27 #include "wine/unicode.h"
28
29 #include <assert.h>
30 #include <fcntl.h>
31 #include <string.h>
32 #include <stdarg.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <sys/time.h>
36 #include <sys/types.h>
37
38 #ifdef HAVE_SYS_IOCTL_H
39 #include <sys/ioctl.h>
40 #endif
41 #ifdef HAVE_SYS_SOCKET_H
42 #include <sys/socket.h>
43 #endif
44 #ifdef HAVE_SYS_FILIO_H
45 #include <sys/filio.h>
46 #endif
47 #include "windef.h"
48 #include "winternl.h"
49
50 #include "file.h"
51 #include "handle.h"
52 #include "thread.h"
53 #include "request.h"
54
55 struct mailslot
56 {
57 struct object obj;
58 struct fd *fd;
59 int write_fd;
60 unsigned int max_msgsize;
61 timeout_t read_timeout;
62 struct list writers;
63 };
64
65 /* mailslot functions */
66 static void mailslot_dump( struct object*, int );
67 static struct fd *mailslot_get_fd( struct object * );
68 static unsigned int mailslot_map_access( struct object *obj, unsigned int access );
69 static struct object *mailslot_open_file( struct object *obj, unsigned int access,
70 unsigned int sharing, unsigned int options );
71 static void mailslot_destroy( struct object * );
72
73 static const struct object_ops mailslot_ops =
74 {
75 sizeof(struct mailslot), /* size */
76 mailslot_dump, /* dump */
77 no_get_type, /* get_type */
78 add_queue, /* add_queue */
79 remove_queue, /* remove_queue */
80 default_fd_signaled, /* signaled */
81 no_satisfied, /* satisfied */
82 no_signal, /* signal */
83 mailslot_get_fd, /* get_fd */
84 mailslot_map_access, /* map_access */
85 default_get_sd, /* get_sd */
86 default_set_sd, /* set_sd */
87 no_lookup_name, /* lookup_name */
88 mailslot_open_file, /* open_file */
89 fd_close_handle, /* close_handle */
90 mailslot_destroy /* destroy */
91 };
92
93 static enum server_fd_type mailslot_get_fd_type( struct fd *fd );
94 static void mailslot_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
95
96 static const struct fd_ops mailslot_fd_ops =
97 {
98 default_fd_get_poll_events, /* get_poll_events */
99 default_poll_event, /* poll_event */
100 no_flush, /* flush */
101 mailslot_get_fd_type, /* get_fd_type */
102 default_fd_ioctl, /* ioctl */
103 mailslot_queue_async, /* queue_async */
104 default_fd_reselect_async, /* reselect_async */
105 default_fd_cancel_async /* cancel_async */
106 };
107
108
109 struct mail_writer
110 {
111 struct object obj;
112 struct fd *fd;
113 struct mailslot *mailslot;
114 struct list entry;
115 unsigned int access;
116 unsigned int sharing;
117 };
118
119 static void mail_writer_dump( struct object *obj, int verbose );
120 static struct fd *mail_writer_get_fd( struct object *obj );
121 static unsigned int mail_writer_map_access( struct object *obj, unsigned int access );
122 static void mail_writer_destroy( struct object *obj);
123
124 static const struct object_ops mail_writer_ops =
125 {
126 sizeof(struct mail_writer), /* size */
127 mail_writer_dump, /* dump */
128 no_get_type, /* get_type */
129 no_add_queue, /* add_queue */
130 NULL, /* remove_queue */
131 NULL, /* signaled */
132 NULL, /* satisfied */
133 no_signal, /* signal */
134 mail_writer_get_fd, /* get_fd */
135 mail_writer_map_access, /* map_access */
136 default_get_sd, /* get_sd */
137 default_set_sd, /* set_sd */
138 no_lookup_name, /* lookup_name */
139 no_open_file, /* open_file */
140 fd_close_handle, /* close_handle */
141 mail_writer_destroy /* destroy */
142 };
143
144 static enum server_fd_type mail_writer_get_fd_type( struct fd *fd );
145
146 static const struct fd_ops mail_writer_fd_ops =
147 {
148 default_fd_get_poll_events, /* get_poll_events */
149 default_poll_event, /* poll_event */
150 no_flush, /* flush */
151 mail_writer_get_fd_type, /* get_fd_type */
152 default_fd_ioctl, /* ioctl */
153 default_fd_queue_async, /* queue_async */
154 default_fd_reselect_async, /* reselect_async */
155 default_fd_cancel_async /* cancel_async */
156 };
157
158
159 struct mailslot_device
160 {
161 struct object obj; /* object header */
162 struct fd *fd; /* pseudo-fd for ioctls */
163 struct namespace *mailslots; /* mailslot namespace */
164 };
165
166 static void mailslot_device_dump( struct object *obj, int verbose );
167 static struct object_type *mailslot_device_get_type( struct object *obj );
168 static struct fd *mailslot_device_get_fd( struct object *obj );
169 static struct object *mailslot_device_lookup_name( struct object *obj, struct unicode_str *name,
170 unsigned int attr );
171 static struct object *mailslot_device_open_file( struct object *obj, unsigned int access,
172 unsigned int sharing, unsigned int options );
173 static void mailslot_device_destroy( struct object *obj );
174 static enum server_fd_type mailslot_device_get_fd_type( struct fd *fd );
175
176 static const struct object_ops mailslot_device_ops =
177 {
178 sizeof(struct mailslot_device), /* size */
179 mailslot_device_dump, /* dump */
180 mailslot_device_get_type, /* get_type */
181 no_add_queue, /* add_queue */
182 NULL, /* remove_queue */
183 NULL, /* signaled */
184 no_satisfied, /* satisfied */
185 no_signal, /* signal */
186 mailslot_device_get_fd, /* get_fd */
187 no_map_access, /* map_access */
188 default_get_sd, /* get_sd */
189 default_set_sd, /* set_sd */
190 mailslot_device_lookup_name, /* lookup_name */
191 mailslot_device_open_file, /* open_file */
192 fd_close_handle, /* close_handle */
193 mailslot_device_destroy /* destroy */
194 };
195
196 static const struct fd_ops mailslot_device_fd_ops =
197 {
198 default_fd_get_poll_events, /* get_poll_events */
199 default_poll_event, /* poll_event */
200 no_flush, /* flush */
201 mailslot_device_get_fd_type, /* get_fd_type */
202 default_fd_ioctl, /* ioctl */
203 default_fd_queue_async, /* queue_async */
204 default_fd_reselect_async, /* reselect_async */
205 default_fd_cancel_async /* cancel_async */
206 };
207
208 static void mailslot_destroy( struct object *obj)
209 {
210 struct mailslot *mailslot = (struct mailslot *) obj;
211
212 assert( mailslot->fd );
213
214 if (mailslot->write_fd != -1)
215 {
216 shutdown( mailslot->write_fd, SHUT_RDWR );
217 close( mailslot->write_fd );
218 }
219 release_object( mailslot->fd );
220 }
221
222 static void mailslot_dump( struct object *obj, int verbose )
223 {
224 struct mailslot *mailslot = (struct mailslot *) obj;
225
226 assert( obj->ops == &mailslot_ops );
227 fprintf( stderr, "Mailslot max_msgsize=%d read_timeout=%s\n",
228 mailslot->max_msgsize, get_timeout_str(mailslot->read_timeout) );
229 }
230
231 static enum server_fd_type mailslot_get_fd_type( struct fd *fd )
232 {
233 return FD_TYPE_MAILSLOT;
234 }
235
236 static struct fd *mailslot_get_fd( struct object *obj )
237 {
238 struct mailslot *mailslot = (struct mailslot *) obj;
239
240 return (struct fd *)grab_object( mailslot->fd );
241 }
242
243 static unsigned int mailslot_map_access( struct object *obj, unsigned int access )
244 {
245 /* mailslots can only be read */
246 if (access & GENERIC_READ) access |= FILE_GENERIC_READ;
247 if (access & GENERIC_ALL) access |= FILE_GENERIC_READ;
248 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
249 }
250
251 static struct object *mailslot_open_file( struct object *obj, unsigned int access,
252 unsigned int sharing, unsigned int options )
253 {
254 struct mailslot *mailslot = (struct mailslot *)obj;
255 struct mail_writer *writer;
256 int unix_fd;
257
258 if (!(sharing & FILE_SHARE_READ))
259 {
260 set_error( STATUS_SHARING_VIOLATION );
261 return NULL;
262 }
263
264 if (!list_empty( &mailslot->writers ))
265 {
266 /* Readers and writers cannot be mixed.
267 * If there's more than one writer, all writers must open with FILE_SHARE_WRITE
268 */
269 writer = LIST_ENTRY( list_head(&mailslot->writers), struct mail_writer, entry );
270
271 if (((access & (GENERIC_WRITE|FILE_WRITE_DATA)) || (writer->access & FILE_WRITE_DATA)) &&
272 !((sharing & FILE_SHARE_WRITE) && (writer->sharing & FILE_SHARE_WRITE)))
273 {
274 set_error( STATUS_SHARING_VIOLATION );
275 return NULL;
276 }
277 }
278
279 if ((unix_fd = dup( mailslot->write_fd )) == -1)
280 {
281 file_set_error();
282 return NULL;
283 }
284 if (!(writer = alloc_object( &mail_writer_ops )))
285 {
286 close( unix_fd );
287 return NULL;
288 }
289 grab_object( mailslot );
290 writer->mailslot = mailslot;
291 writer->access = mail_writer_map_access( &writer->obj, access );
292 writer->sharing = sharing;
293 list_add_head( &mailslot->writers, &writer->entry );
294
295 if (!(writer->fd = create_anonymous_fd( &mail_writer_fd_ops, unix_fd, &writer->obj, options )))
296 {
297 release_object( writer );
298 return NULL;
299 }
300 allow_fd_caching( writer->fd );
301 return &writer->obj;
302 }
303
304 static void mailslot_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
305 {
306 struct mailslot *mailslot = get_fd_user( fd );
307 struct async *async;
308
309 assert(mailslot->obj.ops == &mailslot_ops);
310
311 if ((async = fd_queue_async( fd, data, type )))
312 {
313 async_set_timeout( async, mailslot->read_timeout ? mailslot->read_timeout : -1,
314 STATUS_IO_TIMEOUT );
315 release_object( async );
316 set_error( STATUS_PENDING );
317 }
318 }
319
320 static void mailslot_device_dump( struct object *obj, int verbose )
321 {
322 assert( obj->ops == &mailslot_device_ops );
323 fprintf( stderr, "Mail slot device\n" );
324 }
325
326 static struct object_type *mailslot_device_get_type( struct object *obj )
327 {
328 static const WCHAR name[] = {'D','e','v','i','c','e'};
329 static const struct unicode_str str = { name, sizeof(name) };
330 return get_object_type( &str );
331 }
332
333 static struct fd *mailslot_device_get_fd( struct object *obj )
334 {
335 struct mailslot_device *device = (struct mailslot_device *)obj;
336 return (struct fd *)grab_object( device->fd );
337 }
338
339 static struct object *mailslot_device_lookup_name( struct object *obj, struct unicode_str *name,
340 unsigned int attr )
341 {
342 struct mailslot_device *device = (struct mailslot_device*)obj;
343 struct object *found;
344
345 assert( obj->ops == &mailslot_device_ops );
346
347 if ((found = find_object( device->mailslots, name, attr | OBJ_CASE_INSENSITIVE )))
348 name->len = 0;
349
350 return found;
351 }
352
353 static struct object *mailslot_device_open_file( struct object *obj, unsigned int access,
354 unsigned int sharing, unsigned int options )
355 {
356 return grab_object( obj );
357 }
358
359 static void mailslot_device_destroy( struct object *obj )
360 {
361 struct mailslot_device *device = (struct mailslot_device*)obj;
362 assert( obj->ops == &mailslot_device_ops );
363 if (device->fd) release_object( device->fd );
364 free( device->mailslots );
365 }
366
367 static enum server_fd_type mailslot_device_get_fd_type( struct fd *fd )
368 {
369 return FD_TYPE_DEVICE;
370 }
371
372 void create_mailslot_device( struct directory *root, const struct unicode_str *name )
373 {
374 struct mailslot_device *dev;
375
376 if ((dev = create_named_object_dir( root, name, 0, &mailslot_device_ops )) &&
377 get_error() != STATUS_OBJECT_NAME_EXISTS)
378 {
379 dev->mailslots = NULL;
380 if (!(dev->fd = alloc_pseudo_fd( &mailslot_device_fd_ops, &dev->obj, 0 )) ||
381 !(dev->mailslots = create_namespace( 7 )))
382 {
383 release_object( dev );
384 dev = NULL;
385 }
386 }
387 if (dev) make_object_static( &dev->obj );
388 }
389
390 static struct mailslot *create_mailslot( struct directory *root,
391 const struct unicode_str *name, unsigned int attr,
392 int max_msgsize, timeout_t read_timeout )
393 {
394 struct object *obj;
395 struct unicode_str new_name;
396 struct mailslot_device *dev;
397 struct mailslot *mailslot;
398 int fds[2];
399
400 if (!name || !name->len) return alloc_object( &mailslot_ops );
401
402 if (!(obj = find_object_dir( root, name, attr, &new_name )))
403 {
404 set_error( STATUS_OBJECT_NAME_INVALID );
405 return NULL;
406 }
407
408 if (!new_name.len)
409 {
410 if (attr & OBJ_OPENIF && obj->ops == &mailslot_ops)
411 /* it already exists - there can only be one mailslot to read from */
412 set_error( STATUS_OBJECT_NAME_EXISTS );
413 else if (attr & OBJ_OPENIF)
414 set_error( STATUS_OBJECT_TYPE_MISMATCH );
415 else
416 set_error( STATUS_OBJECT_NAME_COLLISION );
417 release_object( obj );
418 return NULL;
419 }
420
421 if (obj->ops != &mailslot_device_ops)
422 {
423 set_error( STATUS_OBJECT_NAME_INVALID );
424 release_object( obj );
425 return NULL;
426 }
427
428 dev = (struct mailslot_device *)obj;
429 mailslot = create_object( dev->mailslots, &mailslot_ops, &new_name, NULL );
430 release_object( dev );
431
432 if (!mailslot) return NULL;
433
434 mailslot->fd = NULL;
435 mailslot->write_fd = -1;
436 mailslot->max_msgsize = max_msgsize;
437 mailslot->read_timeout = read_timeout;
438 list_init( &mailslot->writers );
439
440 if (!socketpair( PF_UNIX, SOCK_DGRAM, 0, fds ))
441 {
442 fcntl( fds[0], F_SETFL, O_NONBLOCK );
443 fcntl( fds[1], F_SETFL, O_NONBLOCK );
444 shutdown( fds[0], SHUT_RD );
445 mailslot->write_fd = fds[0];
446 if ((mailslot->fd = create_anonymous_fd( &mailslot_fd_ops, fds[1], &mailslot->obj,
447 FILE_SYNCHRONOUS_IO_NONALERT )))
448 {
449 allow_fd_caching( mailslot->fd );
450 return mailslot;
451 }
452 }
453 else file_set_error();
454
455 release_object( mailslot );
456 return NULL;
457 }
458
459 static void mail_writer_dump( struct object *obj, int verbose )
460 {
461 fprintf( stderr, "Mailslot writer\n" );
462 }
463
464 static void mail_writer_destroy( struct object *obj)
465 {
466 struct mail_writer *writer = (struct mail_writer *) obj;
467
468 if (writer->fd) release_object( writer->fd );
469 list_remove( &writer->entry );
470 release_object( writer->mailslot );
471 }
472
473 static enum server_fd_type mail_writer_get_fd_type( struct fd *fd )
474 {
475 return FD_TYPE_MAILSLOT;
476 }
477
478 static struct fd *mail_writer_get_fd( struct object *obj )
479 {
480 struct mail_writer *writer = (struct mail_writer *) obj;
481 return (struct fd *)grab_object( writer->fd );
482 }
483
484 static unsigned int mail_writer_map_access( struct object *obj, unsigned int access )
485 {
486 /* mailslot writers can only get write access */
487 if (access & GENERIC_WRITE) access |= FILE_GENERIC_WRITE;
488 if (access & GENERIC_ALL) access |= FILE_GENERIC_WRITE;
489 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
490 }
491
492 static struct mailslot *get_mailslot_obj( struct process *process, obj_handle_t handle,
493 unsigned int access )
494 {
495 return (struct mailslot *)get_handle_obj( process, handle, access, &mailslot_ops );
496 }
497
498
499 /* create a mailslot */
500 DECL_HANDLER(create_mailslot)
501 {
502 struct mailslot *mailslot;
503 struct unicode_str name;
504 struct directory *root = NULL;
505
506 reply->handle = 0;
507 get_req_unicode_str( &name );
508 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
509 return;
510
511 if ((mailslot = create_mailslot( root, &name, req->attributes, req->max_msgsize,
512 req->read_timeout )))
513 {
514 reply->handle = alloc_handle( current->process, mailslot, req->access, req->attributes );
515 release_object( mailslot );
516 }
517
518 if (root) release_object( root );
519 }
520
521
522 /* set mailslot information */
523 DECL_HANDLER(set_mailslot_info)
524 {
525 struct mailslot *mailslot = get_mailslot_obj( current->process, req->handle, 0 );
526
527 if (mailslot)
528 {
529 if (req->flags & MAILSLOT_SET_READ_TIMEOUT)
530 mailslot->read_timeout = req->read_timeout;
531 reply->max_msgsize = mailslot->max_msgsize;
532 reply->read_timeout = mailslot->read_timeout;
533 release_object( mailslot );
534 }
535 }
536
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