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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 /* 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
* );
73 static const struct object_ops mailslot_ops
=
75 sizeof(struct mailslot
), /* size */
76 mailslot_dump
, /* dump */
77 default_fd_add_queue
, /* add_queue */
78 default_fd_remove_queue
, /* remove_queue */
79 default_fd_signaled
, /* signaled */
80 no_satisfied
, /* satisfied */
81 no_signal
, /* signal */
82 mailslot_get_fd
, /* get_fd */
83 mailslot_map_access
, /* map_access */
84 no_lookup_name
, /* lookup_name */
85 mailslot_open_file
, /* open_file */
86 fd_close_handle
, /* close_handle */
87 mailslot_destroy
/* destroy */
90 static enum server_fd_type
mailslot_get_info( struct fd
*fd
, int *flags
);
91 static void mailslot_queue_async( struct fd
*fd
, const async_data_t
*data
, int type
, int count
);
93 static const struct fd_ops mailslot_fd_ops
=
95 default_fd_get_poll_events
, /* get_poll_events */
96 default_poll_event
, /* poll_event */
98 mailslot_get_info
, /* get_file_info */
99 mailslot_queue_async
, /* queue_async */
100 default_fd_cancel_async
/* cancel_async */
107 struct mailslot
*mailslot
;
110 unsigned int sharing
;
113 static void mail_writer_dump( struct object
*obj
, int verbose
);
114 static struct fd
*mail_writer_get_fd( struct object
*obj
);
115 static unsigned int mail_writer_map_access( struct object
*obj
, unsigned int access
);
116 static void mail_writer_destroy( struct object
*obj
);
118 static const struct object_ops mail_writer_ops
=
120 sizeof(struct mail_writer
), /* size */
121 mail_writer_dump
, /* dump */
122 no_add_queue
, /* add_queue */
123 NULL
, /* remove_queue */
125 NULL
, /* satisfied */
126 no_signal
, /* signal */
127 mail_writer_get_fd
, /* get_fd */
128 mail_writer_map_access
, /* map_access */
129 no_lookup_name
, /* lookup_name */
130 no_open_file
, /* open_file */
131 fd_close_handle
, /* close_handle */
132 mail_writer_destroy
/* destroy */
135 static enum server_fd_type
mail_writer_get_info( struct fd
*fd
, int *flags
);
137 static const struct fd_ops mail_writer_fd_ops
=
139 NULL
, /* get_poll_events */
140 NULL
, /* poll_event */
141 no_flush
, /* flush */
142 mail_writer_get_info
, /* get_file_info */
143 no_queue_async
, /* queue_async */
144 NULL
/* cancel_async */
148 struct mailslot_device
150 struct object obj
; /* object header */
151 struct fd
*fd
; /* pseudo-fd for ioctls */
152 struct namespace *mailslots
; /* mailslot namespace */
155 static void mailslot_device_dump( struct object
*obj
, int verbose
);
156 static struct fd
*mailslot_device_get_fd( struct object
*obj
);
157 static struct object
*mailslot_device_lookup_name( struct object
*obj
, struct unicode_str
*name
,
159 static struct object
*mailslot_device_open_file( struct object
*obj
, unsigned int access
,
160 unsigned int sharing
, unsigned int options
);
161 static void mailslot_device_destroy( struct object
*obj
);
162 static enum server_fd_type
mailslot_device_get_file_info( struct fd
*fd
, int *flags
);
164 static const struct object_ops mailslot_device_ops
=
166 sizeof(struct mailslot_device
), /* size */
167 mailslot_device_dump
, /* dump */
168 no_add_queue
, /* add_queue */
169 NULL
, /* remove_queue */
171 no_satisfied
, /* satisfied */
172 no_signal
, /* signal */
173 mailslot_device_get_fd
, /* get_fd */
174 no_map_access
, /* map_access */
175 mailslot_device_lookup_name
, /* lookup_name */
176 mailslot_device_open_file
, /* open_file */
177 fd_close_handle
, /* close_handle */
178 mailslot_device_destroy
/* destroy */
181 static const struct fd_ops mailslot_device_fd_ops
=
183 default_fd_get_poll_events
, /* get_poll_events */
184 default_poll_event
, /* poll_event */
185 no_flush
, /* flush */
186 mailslot_device_get_file_info
, /* get_file_info */
187 default_fd_queue_async
, /* queue_async */
188 default_fd_cancel_async
/* cancel_async */
191 static void mailslot_destroy( struct object
*obj
)
193 struct mailslot
*mailslot
= (struct mailslot
*) obj
;
195 assert( mailslot
->fd
);
196 assert( mailslot
->write_fd
);
198 release_object( mailslot
->fd
);
199 release_object( mailslot
->write_fd
);
202 static void mailslot_dump( struct object
*obj
, int verbose
)
204 struct mailslot
*mailslot
= (struct mailslot
*) obj
;
206 assert( obj
->ops
== &mailslot_ops
);
207 fprintf( stderr
, "Mailslot max_msgsize=%d read_timeout=%d\n",
208 mailslot
->max_msgsize
, mailslot
->read_timeout
);
211 static int mailslot_message_count(struct mailslot
*mailslot
)
215 /* poll the socket to see if there's any messages */
216 pfd
.fd
= get_unix_fd( mailslot
->fd
);
219 return (poll( &pfd
, 1, 0 ) == 1) ? 1 : 0;
222 static enum server_fd_type
mailslot_get_info( struct fd
*fd
, int *flags
)
224 struct mailslot
*mailslot
= get_fd_user( fd
);
225 assert( mailslot
->obj
.ops
== &mailslot_ops
);
226 *flags
= FD_FLAG_TIMEOUT
| FD_FLAG_AVAILABLE
;
227 return FD_TYPE_MAILSLOT
;
230 static struct fd
*mailslot_get_fd( struct object
*obj
)
232 struct mailslot
*mailslot
= (struct mailslot
*) obj
;
234 return (struct fd
*)grab_object( mailslot
->fd
);
237 static unsigned int mailslot_map_access( struct object
*obj
, unsigned int access
)
239 /* mailslots can only be read */
240 if (access
& GENERIC_READ
) access
|= FILE_GENERIC_READ
;
241 if (access
& GENERIC_ALL
) access
|= FILE_GENERIC_READ
;
242 return access
& ~(GENERIC_READ
| GENERIC_WRITE
| GENERIC_EXECUTE
| GENERIC_ALL
);
245 static struct object
*mailslot_open_file( struct object
*obj
, unsigned int access
,
246 unsigned int sharing
, unsigned int options
)
248 struct mailslot
*mailslot
= (struct mailslot
*)obj
;
249 struct mail_writer
*writer
;
251 if (!(sharing
& FILE_SHARE_READ
))
253 set_error( STATUS_SHARING_VIOLATION
);
257 if (!list_empty( &mailslot
->writers
))
259 /* Readers and writers cannot be mixed.
260 * If there's more than one writer, all writers must open with FILE_SHARE_WRITE
262 writer
= LIST_ENTRY( list_head(&mailslot
->writers
), struct mail_writer
, entry
);
264 if (((access
& (GENERIC_WRITE
|FILE_WRITE_DATA
)) || (writer
->access
& FILE_WRITE_DATA
)) &&
265 !((sharing
& FILE_SHARE_WRITE
) && (writer
->sharing
& FILE_SHARE_WRITE
)))
267 set_error( STATUS_SHARING_VIOLATION
);
272 if (!(writer
= alloc_object( &mail_writer_ops
))) return NULL
;
273 grab_object( mailslot
);
274 writer
->mailslot
= mailslot
;
275 writer
->access
= mail_writer_map_access( &writer
->obj
, access
);
276 writer
->sharing
= sharing
;
278 list_add_head( &mailslot
->writers
, &writer
->entry
);
282 static void mailslot_queue_async( struct fd
*fd
, const async_data_t
*data
, int type
, int count
)
284 struct mailslot
*mailslot
= get_fd_user( fd
);
286 assert(mailslot
->obj
.ops
== &mailslot_ops
);
288 if (list_empty( &mailslot
->writers
) ||
289 !mailslot_message_count( mailslot
))
291 set_error(STATUS_IO_TIMEOUT
);
295 if (mailslot
->read_timeout
!= -1)
297 struct timeval when
= current_time
;
298 add_timeout( &when
, max(1,mailslot
->read_timeout
) );
299 fd_queue_async_timeout( fd
, data
, type
, count
, &when
);
301 else fd_queue_async_timeout( fd
, data
, type
, count
, NULL
);
304 static void mailslot_device_dump( struct object
*obj
, int verbose
)
306 assert( obj
->ops
== &mailslot_device_ops
);
307 fprintf( stderr
, "Mail slot device\n" );
310 static struct fd
*mailslot_device_get_fd( struct object
*obj
)
312 struct mailslot_device
*device
= (struct mailslot_device
*)obj
;
313 return (struct fd
*)grab_object( device
->fd
);
316 static struct object
*mailslot_device_lookup_name( struct object
*obj
, struct unicode_str
*name
,
319 struct mailslot_device
*device
= (struct mailslot_device
*)obj
;
320 struct object
*found
;
322 assert( obj
->ops
== &mailslot_device_ops
);
324 if ((found
= find_object( device
->mailslots
, name
, attr
| OBJ_CASE_INSENSITIVE
)))
330 static struct object
*mailslot_device_open_file( struct object
*obj
, unsigned int access
,
331 unsigned int sharing
, unsigned int options
)
333 return grab_object( obj
);
336 static void mailslot_device_destroy( struct object
*obj
)
338 struct mailslot_device
*device
= (struct mailslot_device
*)obj
;
339 assert( obj
->ops
== &mailslot_device_ops
);
340 if (device
->fd
) release_object( device
->fd
);
341 free( device
->mailslots
);
344 static enum server_fd_type
mailslot_device_get_file_info( struct fd
*fd
, int *flags
)
347 return FD_TYPE_DEVICE
;
350 void create_mailslot_device( struct directory
*root
, const struct unicode_str
*name
)
352 struct mailslot_device
*dev
;
354 if ((dev
= create_named_object_dir( root
, name
, 0, &mailslot_device_ops
)) &&
355 get_error() != STATUS_OBJECT_NAME_EXISTS
)
357 dev
->mailslots
= NULL
;
358 if (!(dev
->fd
= alloc_pseudo_fd( &mailslot_device_fd_ops
, &dev
->obj
)) ||
359 !(dev
->mailslots
= create_namespace( 7 )))
361 release_object( dev
);
365 if (dev
) make_object_static( &dev
->obj
);
368 static struct mailslot
*create_mailslot( struct directory
*root
,
369 const struct unicode_str
*name
, unsigned int attr
,
370 int max_msgsize
, int read_timeout
)
373 struct unicode_str new_name
;
374 struct mailslot_device
*dev
;
375 struct mailslot
*mailslot
;
378 if (!name
|| !name
->len
) return alloc_object( &mailslot_ops
);
380 if (!(obj
= find_object_dir( root
, name
, attr
, &new_name
)))
382 set_error( STATUS_OBJECT_NAME_INVALID
);
388 if (attr
& OBJ_OPENIF
&& obj
->ops
== &mailslot_ops
)
389 /* it already exists - there can only be one mailslot to read from */
390 set_error( STATUS_OBJECT_NAME_EXISTS
);
391 else if (attr
& OBJ_OPENIF
)
392 set_error( STATUS_OBJECT_TYPE_MISMATCH
);
394 set_error( STATUS_OBJECT_NAME_COLLISION
);
395 release_object( obj
);
399 if (obj
->ops
!= &mailslot_device_ops
)
401 set_error( STATUS_OBJECT_NAME_INVALID
);
402 release_object( obj
);
406 dev
= (struct mailslot_device
*)obj
;
407 mailslot
= create_object( dev
->mailslots
, &mailslot_ops
, &new_name
, NULL
);
408 release_object( dev
);
410 if (!mailslot
) return NULL
;
413 mailslot
->write_fd
= NULL
;
414 mailslot
->max_msgsize
= max_msgsize
;
415 mailslot
->read_timeout
= read_timeout
;
416 list_init( &mailslot
->writers
);
418 if (!socketpair( PF_UNIX
, SOCK_DGRAM
, 0, fds
))
420 fcntl( fds
[0], F_SETFL
, O_NONBLOCK
);
421 fcntl( fds
[1], F_SETFL
, O_NONBLOCK
);
422 mailslot
->fd
= create_anonymous_fd( &mailslot_fd_ops
,
423 fds
[1], &mailslot
->obj
);
424 mailslot
->write_fd
= create_anonymous_fd( &mail_writer_fd_ops
,
425 fds
[0], &mailslot
->obj
);
426 if (mailslot
->fd
&& mailslot
->write_fd
) return mailslot
;
428 else file_set_error();
430 release_object( mailslot
);
434 static void mail_writer_dump( struct object
*obj
, int verbose
)
436 fprintf( stderr
, "Mailslot writer\n" );
439 static void mail_writer_destroy( struct object
*obj
)
441 struct mail_writer
*writer
= (struct mail_writer
*) obj
;
443 list_remove( &writer
->entry
);
444 release_object( writer
->mailslot
);
447 static enum server_fd_type
mail_writer_get_info( struct fd
*fd
, int *flags
)
450 return FD_TYPE_MAILSLOT
;
453 static struct fd
*mail_writer_get_fd( struct object
*obj
)
455 struct mail_writer
*writer
= (struct mail_writer
*) obj
;
457 return (struct fd
*)grab_object( writer
->mailslot
->write_fd
);
460 static unsigned int mail_writer_map_access( struct object
*obj
, unsigned int access
)
462 /* mailslot writers can only get write access */
463 if (access
& GENERIC_WRITE
) access
|= FILE_GENERIC_WRITE
;
464 if (access
& GENERIC_ALL
) access
|= FILE_GENERIC_WRITE
;
465 return access
& ~(GENERIC_READ
| GENERIC_WRITE
| GENERIC_EXECUTE
| GENERIC_ALL
);
468 static struct mailslot
*get_mailslot_obj( struct process
*process
, obj_handle_t handle
,
469 unsigned int access
)
471 return (struct mailslot
*)get_handle_obj( process
, handle
, access
, &mailslot_ops
);
475 /* create a mailslot */
476 DECL_HANDLER(create_mailslot
)
478 struct mailslot
*mailslot
;
479 struct unicode_str name
;
480 struct directory
*root
= NULL
;
483 get_req_unicode_str( &name
);
484 if (req
->rootdir
&& !(root
= get_directory_obj( current
->process
, req
->rootdir
, 0 )))
487 if ((mailslot
= create_mailslot( root
, &name
, req
->attributes
, req
->max_msgsize
,
488 req
->read_timeout
)))
490 reply
->handle
= alloc_handle( current
->process
, mailslot
, req
->access
, req
->attributes
);
491 release_object( mailslot
);
494 if (root
) release_object( root
);
498 /* set mailslot information */
499 DECL_HANDLER(set_mailslot_info
)
501 struct mailslot
*mailslot
= get_mailslot_obj( current
->process
, req
->handle
, 0 );
505 if (req
->flags
& MAILSLOT_SET_READ_TIMEOUT
)
506 mailslot
->read_timeout
= req
->read_timeout
;
507 reply
->max_msgsize
= mailslot
->max_msgsize
;
508 reply
->read_timeout
= mailslot
->read_timeout
;
509 release_object( mailslot
);