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[wine.git] / server / named_pipe.c
blob80363cb971a1a46db4f53913cb3137c68d67ac45
1 /*
2 * Server-side pipe management
3 *
4 * Copyright (C) 1998 Alexandre Julliard
5 * Copyright (C) 2001 Mike McCormack
6 * Copyright 2016 Jacek Caban for CodeWeavers
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 */
22
23 #include "config.h"
24 #include "wine/port.h"
25
26 #include <assert.h>
27 #include <fcntl.h>
28 #include <string.h>
29 #include <stdarg.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <sys/time.h>
33 #include <sys/types.h>
34 #ifdef HAVE_SYS_SOCKET_H
35 #include <sys/socket.h>
36 #endif
37 #include <time.h>
38 #include <unistd.h>
39 #ifdef HAVE_POLL_H
40 #include <poll.h>
41 #endif
42
43 #include "ntstatus.h"
44 #define WIN32_NO_STATUS
45 #include "windef.h"
46 #include "winternl.h"
47 #include "winioctl.h"
48
49 #include "file.h"
50 #include "handle.h"
51 #include "thread.h"
52 #include "request.h"
53 #include "security.h"
54
55 enum pipe_state
56 {
57 ps_idle_server,
58 ps_wait_open,
59 ps_connected_server,
60 ps_wait_disconnect,
61 ps_wait_connect
62 };
63
64 struct named_pipe;
65
66 struct pipe_message
67 {
68 struct list entry; /* entry in message queue */
69 data_size_t read_pos; /* already read bytes */
70 struct iosb *iosb; /* message iosb */
71 struct async *async; /* async of pending write */
72 };
73
74 struct pipe_end
75 {
76 struct object obj; /* object header */
77 struct fd *fd; /* pipe file descriptor */
78 unsigned int flags; /* pipe flags */
79 struct pipe_end *connection; /* the other end of the pipe */
80 data_size_t buffer_size;/* size of buffered data that doesn't block caller */
81 struct list message_queue;
82 struct async_queue read_q; /* read queue */
83 struct async_queue write_q; /* write queue */
84 };
85
86 struct pipe_server
87 {
88 struct pipe_end pipe_end; /* common header for pipe_client and pipe_server */
89 struct fd *ioctl_fd; /* file descriptor for ioctls when not connected */
90 struct list entry; /* entry in named pipe servers list */
91 enum pipe_state state; /* server state */
92 struct pipe_client *client; /* client that this server is connected to */
93 struct named_pipe *pipe;
94 struct timeout_user *flush_poll;
95 unsigned int options; /* pipe options */
96 };
97
98 struct pipe_client
99 {
100 struct pipe_end pipe_end; /* common header for pipe_client and pipe_server */
101 struct pipe_server *server; /* server that this client is connected to */
102 unsigned int flags; /* file flags */
103 };
104
105 struct named_pipe
106 {
107 struct object obj; /* object header */
108 unsigned int flags;
109 unsigned int sharing;
110 unsigned int maxinstances;
111 unsigned int outsize;
112 unsigned int insize;
113 unsigned int instances;
114 timeout_t timeout;
115 struct list servers; /* list of servers using this pipe */
116 struct async_queue waiters; /* list of clients waiting to connect */
117 };
118
119 struct named_pipe_device
120 {
121 struct object obj; /* object header */
122 struct fd *fd; /* pseudo-fd for ioctls */
123 struct namespace *pipes; /* named pipe namespace */
124 };
125
126 static void named_pipe_dump( struct object *obj, int verbose );
127 static unsigned int named_pipe_map_access( struct object *obj, unsigned int access );
128 static int named_pipe_link_name( struct object *obj, struct object_name *name, struct object *parent );
129 static struct object *named_pipe_open_file( struct object *obj, unsigned int access,
130 unsigned int sharing, unsigned int options );
131 static void named_pipe_destroy( struct object *obj );
132
133 static const struct object_ops named_pipe_ops =
134 {
135 sizeof(struct named_pipe), /* size */
136 named_pipe_dump, /* dump */
137 no_get_type, /* get_type */
138 no_add_queue, /* add_queue */
139 NULL, /* remove_queue */
140 NULL, /* signaled */
141 NULL, /* satisfied */
142 no_signal, /* signal */
143 no_get_fd, /* get_fd */
144 named_pipe_map_access, /* map_access */
145 default_get_sd, /* get_sd */
146 default_set_sd, /* set_sd */
147 no_lookup_name, /* lookup_name */
148 named_pipe_link_name, /* link_name */
149 default_unlink_name, /* unlink_name */
150 named_pipe_open_file, /* open_file */
151 no_close_handle, /* close_handle */
152 named_pipe_destroy /* destroy */
153 };
154
155 /* common server and client pipe end functions */
156 static enum server_fd_type pipe_end_get_fd_type( struct fd *fd );
157 static int pipe_end_read( struct fd *fd, struct async *async, file_pos_t pos );
158 static int pipe_end_write( struct fd *fd, struct async *async_data, file_pos_t pos );
159 static void pipe_end_queue_async( struct fd *fd, struct async *async, int type, int count );
160 static void pipe_end_reselect_async( struct fd *fd, struct async_queue *queue );
161
162 /* server end functions */
163 static void pipe_server_dump( struct object *obj, int verbose );
164 static struct fd *pipe_server_get_fd( struct object *obj );
165 static void pipe_server_destroy( struct object *obj);
166 static int pipe_server_flush( struct fd *fd, struct async *async );
167 static int pipe_server_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
168
169 static const struct object_ops pipe_server_ops =
170 {
171 sizeof(struct pipe_server), /* size */
172 pipe_server_dump, /* dump */
173 no_get_type, /* get_type */
174 add_queue, /* add_queue */
175 remove_queue, /* remove_queue */
176 default_fd_signaled, /* signaled */
177 no_satisfied, /* satisfied */
178 no_signal, /* signal */
179 pipe_server_get_fd, /* get_fd */
180 default_fd_map_access, /* map_access */
181 default_get_sd, /* get_sd */
182 default_set_sd, /* set_sd */
183 no_lookup_name, /* lookup_name */
184 no_link_name, /* link_name */
185 NULL, /* unlink_name */
186 no_open_file, /* open_file */
187 fd_close_handle, /* close_handle */
188 pipe_server_destroy /* destroy */
189 };
190
191 static const struct fd_ops pipe_server_fd_ops =
192 {
193 default_fd_get_poll_events, /* get_poll_events */
194 default_poll_event, /* poll_event */
195 pipe_end_get_fd_type, /* get_fd_type */
196 pipe_end_read, /* read */
197 pipe_end_write, /* write */
198 pipe_server_flush, /* flush */
199 pipe_server_ioctl, /* ioctl */
200 pipe_end_queue_async, /* queue_async */
201 pipe_end_reselect_async /* reselect_async */
202 };
203
204 /* client end functions */
205 static void pipe_client_dump( struct object *obj, int verbose );
206 static int pipe_client_signaled( struct object *obj, struct wait_queue_entry *entry );
207 static struct fd *pipe_client_get_fd( struct object *obj );
208 static void pipe_client_destroy( struct object *obj );
209 static int pipe_client_flush( struct fd *fd, struct async *async );
210 static int pipe_client_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
211
212 static const struct object_ops pipe_client_ops =
213 {
214 sizeof(struct pipe_client), /* size */
215 pipe_client_dump, /* dump */
216 no_get_type, /* get_type */
217 add_queue, /* add_queue */
218 remove_queue, /* remove_queue */
219 pipe_client_signaled, /* signaled */
220 no_satisfied, /* satisfied */
221 no_signal, /* signal */
222 pipe_client_get_fd, /* get_fd */
223 default_fd_map_access, /* map_access */
224 default_get_sd, /* get_sd */
225 default_set_sd, /* set_sd */
226 no_lookup_name, /* lookup_name */
227 no_link_name, /* link_name */
228 NULL, /* unlink_name */
229 no_open_file, /* open_file */
230 fd_close_handle, /* close_handle */
231 pipe_client_destroy /* destroy */
232 };
233
234 static const struct fd_ops pipe_client_fd_ops =
235 {
236 default_fd_get_poll_events, /* get_poll_events */
237 default_poll_event, /* poll_event */
238 pipe_end_get_fd_type, /* get_fd_type */
239 pipe_end_read, /* read */
240 pipe_end_write, /* write */
241 pipe_client_flush, /* flush */
242 pipe_client_ioctl, /* ioctl */
243 pipe_end_queue_async, /* queue_async */
244 pipe_end_reselect_async /* reselect_async */
245 };
246
247 static void named_pipe_device_dump( struct object *obj, int verbose );
248 static struct object_type *named_pipe_device_get_type( struct object *obj );
249 static struct fd *named_pipe_device_get_fd( struct object *obj );
250 static struct object *named_pipe_device_lookup_name( struct object *obj,
251 struct unicode_str *name, unsigned int attr );
252 static struct object *named_pipe_device_open_file( struct object *obj, unsigned int access,
253 unsigned int sharing, unsigned int options );
254 static void named_pipe_device_destroy( struct object *obj );
255 static enum server_fd_type named_pipe_device_get_fd_type( struct fd *fd );
256 static int named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
257
258 static const struct object_ops named_pipe_device_ops =
259 {
260 sizeof(struct named_pipe_device), /* size */
261 named_pipe_device_dump, /* dump */
262 named_pipe_device_get_type, /* get_type */
263 no_add_queue, /* add_queue */
264 NULL, /* remove_queue */
265 NULL, /* signaled */
266 no_satisfied, /* satisfied */
267 no_signal, /* signal */
268 named_pipe_device_get_fd, /* get_fd */
269 no_map_access, /* map_access */
270 default_get_sd, /* get_sd */
271 default_set_sd, /* set_sd */
272 named_pipe_device_lookup_name, /* lookup_name */
273 directory_link_name, /* link_name */
274 default_unlink_name, /* unlink_name */
275 named_pipe_device_open_file, /* open_file */
276 fd_close_handle, /* close_handle */
277 named_pipe_device_destroy /* destroy */
278 };
279
280 static const struct fd_ops named_pipe_device_fd_ops =
281 {
282 default_fd_get_poll_events, /* get_poll_events */
283 default_poll_event, /* poll_event */
284 named_pipe_device_get_fd_type, /* get_fd_type */
285 no_fd_read, /* read */
286 no_fd_write, /* write */
287 no_fd_flush, /* flush */
288 named_pipe_device_ioctl, /* ioctl */
289 default_fd_queue_async, /* queue_async */
290 default_fd_reselect_async /* reselect_async */
291 };
292
293 /* Returns if we handle I/O via server calls. Currently message-mode pipes are handled this way. */
294 static int use_server_io( struct pipe_end *pipe_end )
295 {
296 return pipe_end->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE;
297 }
298
299 static void named_pipe_dump( struct object *obj, int verbose )
300 {
301 fputs( "Named pipe\n", stderr );
302 }
303
304 static unsigned int named_pipe_map_access( struct object *obj, unsigned int access )
305 {
306 if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ;
307 if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | FILE_CREATE_PIPE_INSTANCE;
308 if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
309 if (access & GENERIC_ALL) access |= STANDARD_RIGHTS_ALL;
310 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
311 }
312
313 static void pipe_server_dump( struct object *obj, int verbose )
314 {
315 struct pipe_server *server = (struct pipe_server *) obj;
316 assert( obj->ops == &pipe_server_ops );
317 fprintf( stderr, "Named pipe server pipe=%p state=%d\n", server->pipe, server->state );
318 }
319
320 static void pipe_client_dump( struct object *obj, int verbose )
321 {
322 struct pipe_client *client = (struct pipe_client *) obj;
323 assert( obj->ops == &pipe_client_ops );
324 fprintf( stderr, "Named pipe client server=%p\n", client->server );
325 }
326
327 static int pipe_client_signaled( struct object *obj, struct wait_queue_entry *entry )
328 {
329 struct pipe_client *client = (struct pipe_client *) obj;
330
331 return client->pipe_end.fd && is_fd_signaled(client->pipe_end.fd);
332 }
333
334 static void named_pipe_destroy( struct object *obj)
335 {
336 struct named_pipe *pipe = (struct named_pipe *) obj;
337
338 assert( list_empty( &pipe->servers ) );
339 assert( !pipe->instances );
340 free_async_queue( &pipe->waiters );
341 }
342
343 static struct fd *pipe_client_get_fd( struct object *obj )
344 {
345 struct pipe_client *client = (struct pipe_client *) obj;
346 if (client->pipe_end.fd)
347 return (struct fd *) grab_object( client->pipe_end.fd );
348 set_error( STATUS_PIPE_DISCONNECTED );
349 return NULL;
350 }
351
352 static void set_server_state( struct pipe_server *server, enum pipe_state state )
353 {
354 server->state = state;
355
356 switch(state)
357 {
358 case ps_connected_server:
359 case ps_wait_disconnect:
360 assert( server->pipe_end.fd );
361 break;
362 case ps_wait_open:
363 case ps_idle_server:
364 assert( !server->pipe_end.fd );
365 set_no_fd_status( server->ioctl_fd, STATUS_PIPE_LISTENING );
366 break;
367 case ps_wait_connect:
368 assert( !server->pipe_end.fd );
369 set_no_fd_status( server->ioctl_fd, STATUS_PIPE_DISCONNECTED );
370 break;
371 }
372 }
373
374 static struct fd *pipe_server_get_fd( struct object *obj )
375 {
376 struct pipe_server *server = (struct pipe_server *) obj;
377
378 return (struct fd *)grab_object( server->pipe_end.fd ? server->pipe_end.fd : server->ioctl_fd );
379 }
380
381
382 static void notify_empty( struct pipe_server *server )
383 {
384 if (!server->flush_poll)
385 return;
386 assert( server->state == ps_connected_server );
387 remove_timeout_user( server->flush_poll );
388 server->flush_poll = NULL;
389 fd_async_wake_up( server->pipe_end.fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
390 }
391
392 static void wake_message( struct pipe_message *message )
393 {
394 struct async *async = message->async;
395
396 message->async = NULL;
397 message->iosb->status = STATUS_SUCCESS;
398 message->iosb->result = message->iosb->in_size;
399 if (async)
400 {
401 async_terminate( async, message->iosb->result ? STATUS_ALERTED : STATUS_SUCCESS );
402 release_object( async );
403 }
404 }
405
406 static void free_message( struct pipe_message *message )
407 {
408 list_remove( &message->entry );
409 if (message->iosb) release_object( message->iosb );
410 free( message );
411 }
412
413 static void pipe_end_disconnect( struct pipe_end *pipe_end, unsigned int status )
414 {
415 struct pipe_end *connection = pipe_end->connection;
416
417 pipe_end->connection = NULL;
418
419 if (use_server_io( pipe_end ))
420 {
421 struct pipe_message *message, *next;
422 struct async *async;
423 if (pipe_end->fd) fd_async_wake_up( pipe_end->fd, ASYNC_TYPE_WAIT, status );
424 async_wake_up( &pipe_end->read_q, status );
425 LIST_FOR_EACH_ENTRY_SAFE( message, next, &pipe_end->message_queue, struct pipe_message, entry )
426 {
427 async = message->async;
428 if (async || status == STATUS_PIPE_DISCONNECTED) free_message( message );
429 if (!async) continue;
430 async_terminate( async, status );
431 release_object( async );
432 }
433 if (status == STATUS_PIPE_DISCONNECTED) set_fd_signaled( pipe_end->fd, 0 );
434 }
435 if (connection)
436 {
437 connection->connection = NULL;
438 pipe_end_disconnect( connection, status );
439 }
440 }
441
442 static void do_disconnect( struct pipe_server *server )
443 {
444 /* we may only have a server fd, if the client disconnected */
445 if (server->client)
446 {
447 assert( server->client->server == server );
448 assert( server->client->pipe_end.fd );
449 if (!use_server_io( &server->pipe_end ))
450 {
451 release_object( server->client->pipe_end.fd );
452 server->client->pipe_end.fd = NULL;
453 }
454 }
455 assert( server->pipe_end.fd );
456 if (!use_server_io( &server->pipe_end ))
457 shutdown( get_unix_fd( server->pipe_end.fd ), SHUT_RDWR );
458 release_object( server->pipe_end.fd );
459 server->pipe_end.fd = NULL;
460 }
461
462 static void pipe_end_destroy( struct pipe_end *pipe_end )
463 {
464 struct pipe_message *message;
465
466 while (!list_empty( &pipe_end->message_queue ))
467 {
468 message = LIST_ENTRY( list_head(&pipe_end->message_queue), struct pipe_message, entry );
469 assert( !message->async );
470 free_message( message );
471 }
472
473 free_async_queue( &pipe_end->read_q );
474 free_async_queue( &pipe_end->write_q );
475 }
476
477 static void pipe_server_destroy( struct object *obj)
478 {
479 struct pipe_server *server = (struct pipe_server *)obj;
480
481 assert( obj->ops == &pipe_server_ops );
482
483 pipe_end_disconnect( &server->pipe_end, STATUS_PIPE_BROKEN );
484
485 if (server->pipe_end.fd)
486 {
487 notify_empty( server );
488 do_disconnect( server );
489 }
490
491 pipe_end_destroy( &server->pipe_end );
492 if (server->client)
493 {
494 server->client->server = NULL;
495 server->client = NULL;
496 }
497
498 assert( server->pipe->instances );
499 server->pipe->instances--;
500
501 if (server->ioctl_fd) release_object( server->ioctl_fd );
502 list_remove( &server->entry );
503 release_object( server->pipe );
504 }
505
506 static void pipe_client_destroy( struct object *obj)
507 {
508 struct pipe_client *client = (struct pipe_client *)obj;
509 struct pipe_server *server = client->server;
510
511 assert( obj->ops == &pipe_client_ops );
512
513 pipe_end_disconnect( &client->pipe_end, STATUS_PIPE_BROKEN );
514
515 if (server)
516 {
517 notify_empty( server );
518
519 switch(server->state)
520 {
521 case ps_connected_server:
522 /* Don't destroy the server's fd here as we can't
523 do a successful flush without it. */
524 set_server_state( server, ps_wait_disconnect );
525 break;
526 case ps_idle_server:
527 case ps_wait_open:
528 case ps_wait_disconnect:
529 case ps_wait_connect:
530 assert( 0 );
531 }
532 assert( server->client );
533 server->client = NULL;
534 client->server = NULL;
535 }
536
537 pipe_end_destroy( &client->pipe_end );
538 if (client->pipe_end.fd) release_object( client->pipe_end.fd );
539 }
540
541 static void named_pipe_device_dump( struct object *obj, int verbose )
542 {
543 fputs( "Named pipe device\n", stderr );
544 }
545
546 static struct object_type *named_pipe_device_get_type( struct object *obj )
547 {
548 static const WCHAR name[] = {'D','e','v','i','c','e'};
549 static const struct unicode_str str = { name, sizeof(name) };
550 return get_object_type( &str );
551 }
552
553 static struct fd *named_pipe_device_get_fd( struct object *obj )
554 {
555 struct named_pipe_device *device = (struct named_pipe_device *)obj;
556 return (struct fd *)grab_object( device->fd );
557 }
558
559 static struct object *named_pipe_device_lookup_name( struct object *obj, struct unicode_str *name,
560 unsigned int attr )
561 {
562 struct named_pipe_device *device = (struct named_pipe_device*)obj;
563 struct object *found;
564
565 assert( obj->ops == &named_pipe_device_ops );
566 assert( device->pipes );
567
568 if (!name) return NULL; /* open the device itself */
569
570 if ((found = find_object( device->pipes, name, attr | OBJ_CASE_INSENSITIVE )))
571 name->len = 0;
572
573 return found;
574 }
575
576 static struct object *named_pipe_device_open_file( struct object *obj, unsigned int access,
577 unsigned int sharing, unsigned int options )
578 {
579 return grab_object( obj );
580 }
581
582 static void named_pipe_device_destroy( struct object *obj )
583 {
584 struct named_pipe_device *device = (struct named_pipe_device*)obj;
585 assert( obj->ops == &named_pipe_device_ops );
586 if (device->fd) release_object( device->fd );
587 free( device->pipes );
588 }
589
590 static enum server_fd_type named_pipe_device_get_fd_type( struct fd *fd )
591 {
592 return FD_TYPE_DEVICE;
593 }
594
595 struct object *create_named_pipe_device( struct object *root, const struct unicode_str *name )
596 {
597 struct named_pipe_device *dev;
598
599 if ((dev = create_named_object( root, &named_pipe_device_ops, name, 0, NULL )) &&
600 get_error() != STATUS_OBJECT_NAME_EXISTS)
601 {
602 dev->pipes = NULL;
603 if (!(dev->fd = alloc_pseudo_fd( &named_pipe_device_fd_ops, &dev->obj, 0 )) ||
604 !(dev->pipes = create_namespace( 7 )))
605 {
606 release_object( dev );
607 dev = NULL;
608 }
609 }
610 return &dev->obj;
611 }
612
613 static int pipe_data_remaining( struct pipe_server *server )
614 {
615 struct pollfd pfd;
616 int fd;
617
618 assert( server->client );
619
620 if (use_server_io( &server->pipe_end ))
621 return !list_empty( &server->client->pipe_end.message_queue );
622
623 fd = get_unix_fd( server->client->pipe_end.fd );
624 if (fd < 0)
625 return 0;
626 pfd.fd = fd;
627 pfd.events = POLLIN;
628 pfd.revents = 0;
629
630 if (0 > poll( &pfd, 1, 0 ))
631 return 0;
632
633 return pfd.revents&POLLIN;
634 }
635
636 static void check_flushed( void *arg )
637 {
638 struct pipe_server *server = (struct pipe_server*) arg;
639
640 if (pipe_data_remaining( server ))
641 {
642 server->flush_poll = add_timeout_user( -TICKS_PER_SEC / 10, check_flushed, server );
643 }
644 else
645 {
646 server->flush_poll = NULL;
647 fd_async_wake_up( server->pipe_end.fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
648 }
649 }
650
651 static int pipe_end_flush( struct pipe_end *pipe_end, struct async *async )
652 {
653 if (use_server_io( pipe_end ) && (!pipe_end->connection || list_empty( &pipe_end->connection->message_queue )))
654 return 1;
655
656 fd_queue_async( pipe_end->fd, async, ASYNC_TYPE_WAIT );
657 set_error( STATUS_PENDING );
658 return 1;
659 }
660
661 static int pipe_server_flush( struct fd *fd, struct async *async )
662 {
663 struct pipe_server *server = get_fd_user( fd );
664 obj_handle_t handle;
665
666 if (!server || server->state != ps_connected_server) return 1;
667
668 if (!pipe_data_remaining( server )) return 1;
669
670 handle = pipe_end_flush( &server->pipe_end, async );
671
672 /* there's no unix way to be alerted when a pipe becomes empty, so resort to polling */
673 if (handle && !use_server_io( &server->pipe_end ) && !server->flush_poll)
674 server->flush_poll = add_timeout_user( -TICKS_PER_SEC / 10, check_flushed, server );
675 return handle;
676 }
677
678 static int pipe_client_flush( struct fd *fd, struct async *async )
679 {
680 struct pipe_end *pipe_end = get_fd_user( fd );
681 /* FIXME: Support byte mode. */
682 return use_server_io( pipe_end ) ? pipe_end_flush( pipe_end, async ) : 1;
683 }
684
685 static void message_queue_read( struct pipe_end *pipe_end, struct iosb *iosb )
686 {
687 struct pipe_message *message;
688
689 if (pipe_end->flags & NAMED_PIPE_MESSAGE_STREAM_READ)
690 {
691 message = LIST_ENTRY( list_head(&pipe_end->message_queue), struct pipe_message, entry );
692 iosb->out_size = min( iosb->out_size, message->iosb->in_size - message->read_pos );
693 iosb->status = message->read_pos + iosb->out_size < message->iosb->in_size
694 ? STATUS_BUFFER_OVERFLOW : STATUS_SUCCESS;
695 }
696 else
697 {
698 data_size_t avail = 0;
699 LIST_FOR_EACH_ENTRY( message, &pipe_end->message_queue, struct pipe_message, entry )
700 {
701 avail += message->iosb->in_size - message->read_pos;
702 if (avail >= iosb->out_size) break;
703 }
704 iosb->out_size = min( iosb->out_size, avail );
705 iosb->status = STATUS_SUCCESS;
706 }
707
708 message = LIST_ENTRY( list_head(&pipe_end->message_queue), struct pipe_message, entry );
709 if (!message->read_pos && message->iosb->in_size == iosb->out_size) /* fast path */
710 {
711 iosb->out_data = message->iosb->in_data;
712 message->iosb->in_data = NULL;
713 wake_message( message );
714 free_message( message );
715 }
716 else
717 {
718 data_size_t write_pos = 0, writing;
719 char *buf = NULL;
720
721 if (iosb->out_size && !(buf = iosb->out_data = malloc( iosb->out_size )))
722 {
723 iosb->out_size = 0;
724 iosb->status = STATUS_NO_MEMORY;
725 return;
726 }
727
728 do
729 {
730 message = LIST_ENTRY( list_head(&pipe_end->message_queue), struct pipe_message, entry );
731 writing = min( iosb->out_size - write_pos, message->iosb->in_size - message->read_pos );
732 if (writing) memcpy( buf + write_pos, (const char *)message->iosb->in_data + message->read_pos, writing );
733 write_pos += writing;
734 message->read_pos += writing;
735 if (message->read_pos == message->iosb->in_size)
736 {
737 wake_message(message);
738 free_message(message);
739 }
740 } while (write_pos < iosb->out_size);
741 }
742 iosb->result = iosb->out_size;
743 }
744
745 /* We call async_terminate in our reselect implementation, which causes recursive reselect.
746 * We're not interested in such reselect calls, so we ignore them. */
747 static int ignore_reselect;
748
749 static void reselect_write_queue( struct pipe_end *pipe_end );
750
751 static void reselect_read_queue( struct pipe_end *pipe_end )
752 {
753 struct async *async;
754 struct iosb *iosb;
755 int read_done = 0;
756
757 ignore_reselect = 1;
758 while (!list_empty( &pipe_end->message_queue ) && (async = find_pending_async( &pipe_end->read_q )))
759 {
760 iosb = async_get_iosb( async );
761 message_queue_read( pipe_end, iosb );
762 async_terminate( async, iosb->result ? STATUS_ALERTED : iosb->status );
763 release_object( async );
764 release_object( iosb );
765 read_done = 1;
766 }
767 ignore_reselect = 0;
768
769 if (pipe_end->connection)
770 {
771 if (list_empty( &pipe_end->message_queue ))
772 fd_async_wake_up( pipe_end->connection->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
773 else if (read_done)
774 reselect_write_queue( pipe_end->connection );
775 }
776 }
777
778 static void reselect_write_queue( struct pipe_end *pipe_end )
779 {
780 struct pipe_message *message, *next;
781 struct pipe_end *reader = pipe_end->connection;
782 data_size_t avail = 0;
783
784 if (!reader) return;
785
786 ignore_reselect = 1;
787
788 LIST_FOR_EACH_ENTRY_SAFE( message, next, &reader->message_queue, struct pipe_message, entry )
789 {
790 if (message->async && message->iosb->status != STATUS_PENDING)
791 {
792 release_object( message->async );
793 message->async = NULL;
794 free_message( message );
795 }
796 else
797 {
798 avail += message->iosb->in_size - message->read_pos;
799 if (message->iosb->status == STATUS_PENDING && (avail <= reader->buffer_size || !message->iosb->in_size))
800 wake_message( message );
801 }
802 }
803
804 ignore_reselect = 0;
805 reselect_read_queue( reader );
806 }
807
808 static int pipe_end_read( struct fd *fd, struct async *async, file_pos_t pos )
809 {
810 struct pipe_end *pipe_end = get_fd_user( fd );
811
812 if (!use_server_io( pipe_end )) return no_fd_read( fd, async, pos );
813
814 if (!pipe_end->connection && list_empty( &pipe_end->message_queue ))
815 {
816 set_error( STATUS_PIPE_BROKEN );
817 return 0;
818 }
819
820 queue_async( &pipe_end->read_q, async );
821 reselect_read_queue( pipe_end );
822 set_error( STATUS_PENDING );
823 return 1;
824 }
825
826 static int pipe_end_write( struct fd *fd, struct async *async, file_pos_t pos )
827 {
828 struct pipe_end *write_end = get_fd_user( fd );
829 struct pipe_end *read_end = write_end->connection;
830 struct pipe_message *message;
831
832 if (!use_server_io( write_end )) return no_fd_write( fd, async, pos );
833
834 if (!read_end)
835 {
836 set_error( STATUS_PIPE_DISCONNECTED );
837 return 0;
838 }
839
840 if (!(message = mem_alloc( sizeof(*message) ))) return 0;
841 message->async = (struct async *)grab_object( async );
842 message->iosb = async_get_iosb( async );
843 message->read_pos = 0;
844 list_add_tail( &read_end->message_queue, &message->entry );
845
846 queue_async( &write_end->write_q, async );
847 reselect_write_queue( write_end );
848 set_error( STATUS_PENDING );
849 return 1;
850 }
851
852 static void pipe_end_queue_async( struct fd *fd, struct async *async, int type, int count )
853 {
854 struct pipe_end *pipe_end = get_fd_user( fd );
855 if (use_server_io( pipe_end )) no_fd_queue_async( fd, async, type, count );
856 else default_fd_queue_async( fd, async, type, count );
857 }
858
859 static void pipe_end_reselect_async( struct fd *fd, struct async_queue *queue )
860 {
861 struct pipe_end *pipe_end = get_fd_user( fd );
862
863 if (ignore_reselect) return;
864
865 if (!use_server_io( pipe_end ))
866 default_fd_reselect_async( fd, queue );
867 else if (&pipe_end->write_q == queue)
868 reselect_write_queue( pipe_end );
869 else if (&pipe_end->read_q == queue)
870 reselect_read_queue( pipe_end );
871 }
872
873 static inline int is_overlapped( unsigned int options )
874 {
875 return !(options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT));
876 }
877
878 static enum server_fd_type pipe_end_get_fd_type( struct fd *fd )
879 {
880 return FD_TYPE_PIPE;
881 }
882
883 static int pipe_end_peek( struct pipe_end *pipe_end )
884 {
885 unsigned reply_size = get_reply_max_size();
886 FILE_PIPE_PEEK_BUFFER *buffer;
887 struct pipe_message *message;
888 data_size_t avail = 0;
889 data_size_t message_length = 0;
890
891 if (!use_server_io( pipe_end ))
892 {
893 set_error( STATUS_NOT_SUPPORTED );
894 return 0;
895 }
896
897 if (reply_size < offsetof( FILE_PIPE_PEEK_BUFFER, Data ))
898 {
899 set_error( STATUS_INFO_LENGTH_MISMATCH );
900 return 0;
901 }
902 reply_size -= offsetof( FILE_PIPE_PEEK_BUFFER, Data );
903
904 LIST_FOR_EACH_ENTRY( message, &pipe_end->message_queue, struct pipe_message, entry )
905 avail += message->iosb->in_size - message->read_pos;
906
907 if (avail)
908 {
909 message = LIST_ENTRY( list_head(&pipe_end->message_queue), struct pipe_message, entry );
910 message_length = message->iosb->in_size - message->read_pos;
911 reply_size = min( reply_size, message_length );
912 }
913 else reply_size = 0;
914
915 if (!(buffer = set_reply_data_size( offsetof( FILE_PIPE_PEEK_BUFFER, Data[reply_size] )))) return 0;
916 buffer->NamedPipeState = 0; /* FIXME */
917 buffer->ReadDataAvailable = avail;
918 buffer->NumberOfMessages = 0; /* FIXME */
919 buffer->MessageLength = message_length;
920 if (reply_size) memcpy( buffer->Data, (const char *)message->iosb->in_data + message->read_pos, reply_size );
921 return 1;
922 }
923
924 static int pipe_server_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
925 {
926 struct pipe_server *server = get_fd_user( fd );
927
928 switch(code)
929 {
930 case FSCTL_PIPE_LISTEN:
931 switch(server->state)
932 {
933 case ps_idle_server:
934 case ps_wait_connect:
935 fd_queue_async( server->ioctl_fd, async, ASYNC_TYPE_WAIT );
936 set_server_state( server, ps_wait_open );
937 async_wake_up( &server->pipe->waiters, STATUS_SUCCESS );
938 set_error( STATUS_PENDING );
939 return 1;
940 case ps_connected_server:
941 set_error( STATUS_PIPE_CONNECTED );
942 break;
943 case ps_wait_disconnect:
944 set_error( STATUS_NO_DATA_DETECTED );
945 break;
946 case ps_wait_open:
947 set_error( STATUS_INVALID_HANDLE );
948 break;
949 }
950 return 0;
951
952 case FSCTL_PIPE_DISCONNECT:
953 switch(server->state)
954 {
955 case ps_connected_server:
956 assert( server->client );
957 assert( server->client->pipe_end.fd );
958
959 notify_empty( server );
960
961 /* dump the client and server fds - client loses all waiting data */
962 pipe_end_disconnect( &server->pipe_end, STATUS_PIPE_DISCONNECTED );
963 do_disconnect( server );
964 server->client->server = NULL;
965 server->client = NULL;
966 set_server_state( server, ps_wait_connect );
967 break;
968 case ps_wait_disconnect:
969 assert( !server->client );
970 pipe_end_disconnect( &server->pipe_end, STATUS_PIPE_DISCONNECTED );
971 do_disconnect( server );
972 set_server_state( server, ps_wait_connect );
973 break;
974 case ps_idle_server:
975 case ps_wait_open:
976 set_error( STATUS_PIPE_LISTENING );
977 return 0;
978 case ps_wait_connect:
979 set_error( STATUS_PIPE_DISCONNECTED );
980 return 0;
981 }
982 return 1;
983
984 case FSCTL_PIPE_PEEK:
985 return pipe_end_peek( &server->pipe_end );
986
987 default:
988 return default_fd_ioctl( fd, code, async );
989 }
990 }
991
992 static int pipe_client_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
993 {
994 struct pipe_client *client = get_fd_user( fd );
995
996 switch(code)
997 {
998 case FSCTL_PIPE_PEEK:
999 return pipe_end_peek( &client->pipe_end );
1000
1001 default:
1002 return default_fd_ioctl( fd, code, async );
1003 }
1004 }
1005
1006 static struct pipe_server *get_pipe_server_obj( struct process *process,
1007 obj_handle_t handle, unsigned int access )
1008 {
1009 struct object *obj;
1010 obj = get_handle_obj( process, handle, access, &pipe_server_ops );
1011 return (struct pipe_server *) obj;
1012 }
1013
1014 static void init_pipe_end( struct pipe_end *pipe_end, unsigned int pipe_flags, data_size_t buffer_size )
1015 {
1016 pipe_end->fd = NULL;
1017 pipe_end->flags = pipe_flags;
1018 pipe_end->connection = NULL;
1019 pipe_end->buffer_size = buffer_size;
1020 init_async_queue( &pipe_end->read_q );
1021 init_async_queue( &pipe_end->write_q );
1022 list_init( &pipe_end->message_queue );
1023 }
1024
1025 static struct pipe_server *create_pipe_server( struct named_pipe *pipe, unsigned int options,
1026 unsigned int pipe_flags )
1027 {
1028 struct pipe_server *server;
1029
1030 server = alloc_object( &pipe_server_ops );
1031 if (!server)
1032 return NULL;
1033
1034 server->pipe = pipe;
1035 server->client = NULL;
1036 server->flush_poll = NULL;
1037 server->options = options;
1038 init_pipe_end( &server->pipe_end, pipe_flags, pipe->insize );
1039
1040 list_add_head( &pipe->servers, &server->entry );
1041 grab_object( pipe );
1042 if (!(server->ioctl_fd = alloc_pseudo_fd( &pipe_server_fd_ops, &server->pipe_end.obj, options )))
1043 {
1044 release_object( server );
1045 return NULL;
1046 }
1047 set_fd_signaled( server->ioctl_fd, 1 );
1048 set_server_state( server, ps_idle_server );
1049 return server;
1050 }
1051
1052 static struct pipe_client *create_pipe_client( unsigned int flags, unsigned int pipe_flags, data_size_t buffer_size )
1053 {
1054 struct pipe_client *client;
1055
1056 client = alloc_object( &pipe_client_ops );
1057 if (!client)
1058 return NULL;
1059
1060 client->server = NULL;
1061 client->flags = flags;
1062 init_pipe_end( &client->pipe_end, pipe_flags, buffer_size );
1063
1064 return client;
1065 }
1066
1067 static struct pipe_server *find_available_server( struct named_pipe *pipe )
1068 {
1069 struct pipe_server *server;
1070
1071 /* look for pipe servers that are listening */
1072 LIST_FOR_EACH_ENTRY( server, &pipe->servers, struct pipe_server, entry )
1073 {
1074 if (server->state == ps_wait_open)
1075 return (struct pipe_server *)grab_object( server );
1076 }
1077
1078 /* fall back to pipe servers that are idle */
1079 LIST_FOR_EACH_ENTRY( server, &pipe->servers, struct pipe_server, entry )
1080 {
1081 if (server->state == ps_idle_server)
1082 return (struct pipe_server *)grab_object( server );
1083 }
1084
1085 return NULL;
1086 }
1087
1088 static int named_pipe_link_name( struct object *obj, struct object_name *name, struct object *parent )
1089 {
1090 struct named_pipe_device *dev = (struct named_pipe_device *)parent;
1091
1092 if (parent->ops != &named_pipe_device_ops)
1093 {
1094 set_error( STATUS_OBJECT_NAME_INVALID );
1095 return 0;
1096 }
1097 namespace_add( dev->pipes, name );
1098 name->parent = grab_object( parent );
1099 return 1;
1100 }
1101
1102 static struct object *named_pipe_open_file( struct object *obj, unsigned int access,
1103 unsigned int sharing, unsigned int options )
1104 {
1105 struct named_pipe *pipe = (struct named_pipe *)obj;
1106 struct pipe_server *server;
1107 struct pipe_client *client;
1108 unsigned int pipe_sharing;
1109 int fds[2];
1110
1111 if (!(server = find_available_server( pipe )))
1112 {
1113 set_error( STATUS_PIPE_NOT_AVAILABLE );
1114 return NULL;
1115 }
1116
1117 pipe_sharing = server->pipe->sharing;
1118 if (((access & GENERIC_READ) && !(pipe_sharing & FILE_SHARE_READ)) ||
1119 ((access & GENERIC_WRITE) && !(pipe_sharing & FILE_SHARE_WRITE)))
1120 {
1121 set_error( STATUS_ACCESS_DENIED );
1122 release_object( server );
1123 return NULL;
1124 }
1125
1126 if ((client = create_pipe_client( options, pipe->flags, pipe->outsize )))
1127 {
1128 if (use_server_io( &server->pipe_end ))
1129 {
1130 client->pipe_end.fd = alloc_pseudo_fd( &pipe_client_fd_ops, &client->pipe_end.obj, options );
1131 if (client->pipe_end.fd)
1132 {
1133 set_fd_signaled( client->pipe_end.fd, 1 );
1134 server->pipe_end.fd = (struct fd *)grab_object( server->ioctl_fd );
1135 set_no_fd_status( server->ioctl_fd, STATUS_BAD_DEVICE_TYPE );
1136 }
1137 else
1138 {
1139 release_object( client );
1140 client = NULL;
1141 }
1142 }
1143 else if (!socketpair( PF_UNIX, SOCK_STREAM, 0, fds ))
1144 {
1145 assert( !server->pipe_end.fd );
1146
1147 /* for performance reasons, only set nonblocking mode when using
1148 * overlapped I/O. Otherwise, we will be doing too much busy
1149 * looping */
1150 if (is_overlapped( options )) fcntl( fds[1], F_SETFL, O_NONBLOCK );
1151 if (is_overlapped( server->options )) fcntl( fds[0], F_SETFL, O_NONBLOCK );
1152
1153 if (pipe->insize)
1154 {
1155 setsockopt( fds[0], SOL_SOCKET, SO_RCVBUF, &pipe->insize, sizeof(pipe->insize) );
1156 setsockopt( fds[1], SOL_SOCKET, SO_RCVBUF, &pipe->insize, sizeof(pipe->insize) );
1157 }
1158 if (pipe->outsize)
1159 {
1160 setsockopt( fds[0], SOL_SOCKET, SO_SNDBUF, &pipe->outsize, sizeof(pipe->outsize) );
1161 setsockopt( fds[1], SOL_SOCKET, SO_SNDBUF, &pipe->outsize, sizeof(pipe->outsize) );
1162 }
1163
1164 client->pipe_end.fd = create_anonymous_fd( &pipe_client_fd_ops, fds[1], &client->pipe_end.obj, options );
1165 server->pipe_end.fd = create_anonymous_fd( &pipe_server_fd_ops, fds[0], &server->pipe_end.obj, server->options );
1166 if (client->pipe_end.fd && server->pipe_end.fd)
1167 {
1168 fd_copy_completion( server->ioctl_fd, server->pipe_end.fd );
1169 }
1170 else
1171 {
1172 release_object( client );
1173 client = NULL;
1174 }
1175 }
1176 else
1177 {
1178 file_set_error();
1179 release_object( client );
1180 client = NULL;
1181 }
1182 if (client)
1183 {
1184 allow_fd_caching( client->pipe_end.fd );
1185 allow_fd_caching( server->pipe_end.fd );
1186 if (server->state == ps_wait_open)
1187 fd_async_wake_up( server->ioctl_fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
1188 set_server_state( server, ps_connected_server );
1189 server->client = client;
1190 client->server = server;
1191 server->pipe_end.connection = &client->pipe_end;
1192 client->pipe_end.connection = &server->pipe_end;
1193 }
1194 }
1195 release_object( server );
1196 return &client->pipe_end.obj;
1197 }
1198
1199 static int named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
1200 {
1201 struct named_pipe_device *device = get_fd_user( fd );
1202
1203 switch(code)
1204 {
1205 case FSCTL_PIPE_WAIT:
1206 {
1207 const FILE_PIPE_WAIT_FOR_BUFFER *buffer = get_req_data();
1208 data_size_t size = get_req_data_size();
1209 struct named_pipe *pipe;
1210 struct pipe_server *server;
1211 struct unicode_str name;
1212 timeout_t when;
1213
1214 if (size < sizeof(*buffer) ||
1215 size < FIELD_OFFSET(FILE_PIPE_WAIT_FOR_BUFFER, Name[buffer->NameLength/sizeof(WCHAR)]))
1216 {
1217 set_error( STATUS_INVALID_PARAMETER );
1218 return 0;
1219 }
1220 name.str = buffer->Name;
1221 name.len = (buffer->NameLength / sizeof(WCHAR)) * sizeof(WCHAR);
1222 if (!(pipe = open_named_object( &device->obj, &named_pipe_ops, &name, 0 ))) return 0;
1223
1224 if (!(server = find_available_server( pipe )))
1225 {
1226 queue_async( &pipe->waiters, async );
1227 when = buffer->TimeoutSpecified ? buffer->Timeout.QuadPart : pipe->timeout;
1228 async_set_timeout( async, when, STATUS_IO_TIMEOUT );
1229 release_object( pipe );
1230 set_error( STATUS_PENDING );
1231 return 1;
1232 }
1233
1234 release_object( server );
1235 release_object( pipe );
1236 return 0;
1237 }
1238
1239 default:
1240 return default_fd_ioctl( fd, code, async );
1241 }
1242 }
1243
1244
1245 DECL_HANDLER(create_named_pipe)
1246 {
1247 struct named_pipe *pipe;
1248 struct pipe_server *server;
1249 struct unicode_str name;
1250 struct object *root;
1251 const struct security_descriptor *sd;
1252 const struct object_attributes *objattr = get_req_object_attributes( &sd, &name, &root );
1253
1254 if (!objattr) return;
1255
1256 if (!req->sharing || (req->sharing & ~(FILE_SHARE_READ | FILE_SHARE_WRITE)) ||
1257 (!(req->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE) && (req->flags & NAMED_PIPE_MESSAGE_STREAM_READ)))
1258 {
1259 if (root) release_object( root );
1260 set_error( STATUS_INVALID_PARAMETER );
1261 return;
1262 }
1263
1264 if (!name.len) /* pipes need a root directory even without a name */
1265 {
1266 if (!objattr->rootdir)
1267 {
1268 set_error( STATUS_OBJECT_PATH_SYNTAX_BAD );
1269 return;
1270 }
1271 if (!(root = get_directory_obj( current->process, objattr->rootdir ))) return;
1272 }
1273
1274 pipe = create_named_object( root, &named_pipe_ops, &name, objattr->attributes | OBJ_OPENIF, NULL );
1275
1276 if (root) release_object( root );
1277 if (!pipe) return;
1278
1279 if (get_error() != STATUS_OBJECT_NAME_EXISTS)
1280 {
1281 /* initialize it if it didn't already exist */
1282 pipe->instances = 0;
1283 init_async_queue( &pipe->waiters );
1284 list_init( &pipe->servers );
1285 pipe->insize = req->insize;
1286 pipe->outsize = req->outsize;
1287 pipe->maxinstances = req->maxinstances;
1288 pipe->timeout = req->timeout;
1289 pipe->flags = req->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE;
1290 pipe->sharing = req->sharing;
1291 }
1292 else
1293 {
1294 if (pipe->maxinstances <= pipe->instances)
1295 {
1296 set_error( STATUS_INSTANCE_NOT_AVAILABLE );
1297 release_object( pipe );
1298 return;
1299 }
1300 if (pipe->sharing != req->sharing)
1301 {
1302 set_error( STATUS_ACCESS_DENIED );
1303 release_object( pipe );
1304 return;
1305 }
1306 clear_error(); /* clear the name collision */
1307 }
1308
1309 server = create_pipe_server( pipe, req->options, req->flags );
1310 if (server)
1311 {
1312 reply->handle = alloc_handle( current->process, server, req->access, objattr->attributes );
1313 server->pipe->instances++;
1314 if (sd) default_set_sd( &server->pipe_end.obj, sd, OWNER_SECURITY_INFORMATION |
1315 GROUP_SECURITY_INFORMATION |
1316 DACL_SECURITY_INFORMATION |
1317 SACL_SECURITY_INFORMATION );
1318 release_object( server );
1319 }
1320
1321 release_object( pipe );
1322 }
1323
1324 DECL_HANDLER(get_named_pipe_info)
1325 {
1326 struct pipe_server *server;
1327 struct pipe_client *client = NULL;
1328
1329 server = get_pipe_server_obj( current->process, req->handle, FILE_READ_ATTRIBUTES );
1330 if (!server)
1331 {
1332 if (get_error() != STATUS_OBJECT_TYPE_MISMATCH)
1333 return;
1334
1335 clear_error();
1336 client = (struct pipe_client *)get_handle_obj( current->process, req->handle,
1337 0, &pipe_client_ops );
1338 if (!client) return;
1339 server = client->server;
1340 }
1341
1342 reply->flags = client ? client->pipe_end.flags : server->pipe_end.flags;
1343 if (server)
1344 {
1345 reply->sharing = server->pipe->sharing;
1346 reply->maxinstances = server->pipe->maxinstances;
1347 reply->instances = server->pipe->instances;
1348 reply->insize = server->pipe->insize;
1349 reply->outsize = server->pipe->outsize;
1350 }
1351
1352 if (client)
1353 release_object(client);
1354 else
1355 {
1356 reply->flags |= NAMED_PIPE_SERVER_END;
1357 release_object(server);
1358 }
1359 }
1360
1361 DECL_HANDLER(set_named_pipe_info)
1362 {
1363 struct pipe_server *server;
1364 struct pipe_client *client = NULL;
1365
1366 server = get_pipe_server_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES );
1367 if (!server)
1368 {
1369 if (get_error() != STATUS_OBJECT_TYPE_MISMATCH)
1370 return;
1371
1372 clear_error();
1373 client = (struct pipe_client *)get_handle_obj( current->process, req->handle,
1374 0, &pipe_client_ops );
1375 if (!client) return;
1376 if (!(server = client->server))
1377 {
1378 release_object( client );
1379 return;
1380 }
1381 }
1382
1383 if ((req->flags & ~(NAMED_PIPE_MESSAGE_STREAM_READ | NAMED_PIPE_NONBLOCKING_MODE)) ||
1384 ((req->flags & NAMED_PIPE_MESSAGE_STREAM_READ) && !(server->pipe->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE)))
1385 {
1386 set_error( STATUS_INVALID_PARAMETER );
1387 }
1388 else if (client)
1389 {
1390 client->pipe_end.flags = server->pipe->flags | req->flags;
1391 }
1392 else
1393 {
1394 server->pipe_end.flags = server->pipe->flags | req->flags;
1395 }
1396
1397 if (client)
1398 release_object(client);
1399 else
1400 release_object(server);
1401 }
Windows API implementation