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"
25 #include "wine/unicode.h"
34 #include <sys/types.h>
36 #ifdef HAVE_SYS_IOCTL_H
37 #include <sys/ioctl.h>
39 #ifdef HAVE_SYS_SOCKET_H
40 #include <sys/socket.h>
42 #ifdef HAVE_SYS_FILIO_H
43 #include <sys/filio.h>
58 unsigned int max_msgsize
;
59 unsigned int read_timeout
;
63 /* mailslot functions */
64 static void mailslot_dump( struct object
*, int );
65 static struct fd
*mailslot_get_fd( struct object
* );
66 static void mailslot_destroy( struct object
* );
68 static const struct object_ops mailslot_ops
=
70 sizeof(struct mailslot
), /* size */
71 mailslot_dump
, /* dump */
72 default_fd_add_queue
, /* add_queue */
73 default_fd_remove_queue
, /* remove_queue */
74 default_fd_signaled
, /* signaled */
75 no_satisfied
, /* satisfied */
76 no_signal
, /* signal */
77 mailslot_get_fd
, /* get_fd */
78 no_close_handle
, /* close_handle */
79 mailslot_destroy
/* destroy */
82 static int mailslot_get_info( struct fd
* );
83 static void mailslot_queue_async( struct fd
*, void*, void*, void*, int, int );
85 static const struct fd_ops mailslot_fd_ops
=
87 default_fd_get_poll_events
, /* get_poll_events */
88 default_poll_event
, /* poll_event */
90 mailslot_get_info
, /* get_file_info */
91 mailslot_queue_async
, /* queue_async */
92 default_fd_cancel_async
/* cancel_async */
98 struct mailslot
*mailslot
;
104 static void mail_writer_dump( struct object
*obj
, int verbose
);
105 static struct fd
*mail_writer_get_fd( struct object
*obj
);
106 static void mail_writer_destroy( struct object
*obj
);
108 static const struct object_ops mail_writer_ops
=
110 sizeof(struct mail_writer
), /* size */
111 mail_writer_dump
, /* dump */
112 no_add_queue
, /* add_queue */
113 NULL
, /* remove_queue */
115 NULL
, /* satisfied */
116 no_signal
, /* signal */
117 mail_writer_get_fd
, /* get_fd */
118 no_close_handle
, /* close_handle */
119 mail_writer_destroy
/* destroy */
122 static int mail_writer_get_info( struct fd
*fd
);
124 static const struct fd_ops mail_writer_fd_ops
=
126 NULL
, /* get_poll_events */
127 NULL
, /* poll_event */
128 no_flush
, /* flush */
129 mail_writer_get_info
, /* get_file_info */
130 no_queue_async
, /* queue_async */
131 NULL
/* cancel_async */
134 static void mailslot_destroy( struct object
*obj
)
136 struct mailslot
*mailslot
= (struct mailslot
*) obj
;
138 assert( mailslot
->fd
);
139 assert( mailslot
->write_fd
);
141 release_object( mailslot
->fd
);
142 release_object( mailslot
->write_fd
);
145 static void mailslot_dump( struct object
*obj
, int verbose
)
147 struct mailslot
*mailslot
= (struct mailslot
*) obj
;
149 assert( obj
->ops
== &mailslot_ops
);
150 fprintf( stderr
, "Mailslot max_msgsize=%d read_timeout=%d\n",
151 mailslot
->max_msgsize
, mailslot
->read_timeout
);
154 static int mailslot_message_count(struct mailslot
*mailslot
)
158 /* poll the socket to see if there's any messages */
159 pfd
.fd
= get_unix_fd( mailslot
->fd
);
162 return (poll( &pfd
, 1, 0 ) == 1) ? 1 : 0;
165 static int mailslot_next_msg_size( struct mailslot
*mailslot
)
170 fd
= get_unix_fd( mailslot
->fd
);
171 ioctl( fd
, FIONREAD
, &size
);
175 static int mailslot_get_info( struct fd
*fd
)
177 struct mailslot
*mailslot
= get_fd_user( fd
);
178 assert( mailslot
->obj
.ops
== &mailslot_ops
);
179 return FD_FLAG_TIMEOUT
| FD_FLAG_AVAILABLE
;
182 static struct fd
*mailslot_get_fd( struct object
*obj
)
184 struct mailslot
*mailslot
= (struct mailslot
*) obj
;
186 return (struct fd
*)grab_object( mailslot
->fd
);
189 static void mailslot_queue_async( struct fd
*fd
, void *apc
, void *user
,
190 void *iosb
, int type
, int count
)
192 struct mailslot
*mailslot
= get_fd_user( fd
);
195 assert(mailslot
->obj
.ops
== &mailslot_ops
);
197 if (type
!= ASYNC_TYPE_READ
)
199 set_error(STATUS_INVALID_PARAMETER
);
203 if (list_empty( &mailslot
->writers
) ||
204 !mailslot_message_count( mailslot
))
206 set_error(STATUS_IO_TIMEOUT
);
210 if (mailslot
->read_timeout
!= MAILSLOT_WAIT_FOREVER
)
211 timeout
= &mailslot
->read_timeout
;
213 fd_queue_async_timeout( fd
, apc
, user
, iosb
, type
, count
, timeout
);
216 static struct mailslot
*create_mailslot( const WCHAR
*name
, size_t len
, unsigned int attr
,
217 int max_msgsize
, int read_timeout
)
219 struct mailslot
*mailslot
;
221 static const WCHAR slot
[] = {'m','a','i','l','s','l','o','t','\\',0};
223 if (( len
<= strlenW( slot
)) || strncmpiW( slot
, name
, strlenW( slot
) ))
225 set_error( STATUS_OBJECT_NAME_INVALID
);
229 mailslot
= create_named_object( sync_namespace
, &mailslot_ops
, name
, len
, attr
);
233 /* it already exists - there can only be one mailslot to read from */
234 if (get_error() == STATUS_OBJECT_NAME_COLLISION
)
236 release_object( mailslot
);
241 mailslot
->write_fd
= NULL
;
242 mailslot
->max_msgsize
= max_msgsize
;
243 mailslot
->read_timeout
= read_timeout
;
244 list_init( &mailslot
->writers
);
246 if (!socketpair( PF_UNIX
, SOCK_DGRAM
, 0, fds
))
248 fcntl( fds
[0], F_SETFL
, O_NONBLOCK
);
249 fcntl( fds
[1], F_SETFL
, O_NONBLOCK
);
250 mailslot
->fd
= create_anonymous_fd( &mailslot_fd_ops
,
251 fds
[1], &mailslot
->obj
);
252 mailslot
->write_fd
= create_anonymous_fd( &mail_writer_fd_ops
,
253 fds
[0], &mailslot
->obj
);
254 if (mailslot
->fd
&& mailslot
->write_fd
) return mailslot
;
256 else file_set_error();
258 release_object( mailslot
);
262 static struct mailslot
*open_mailslot( const WCHAR
*name
, size_t len
, unsigned int attr
)
266 obj
= find_object( sync_namespace
, name
, len
, attr
);
269 if (obj
->ops
== &mailslot_ops
)
270 return (struct mailslot
*)obj
;
271 release_object( obj
);
272 set_error( STATUS_OBJECT_TYPE_MISMATCH
);
275 set_error( STATUS_OBJECT_NAME_NOT_FOUND
);
280 static void mail_writer_dump( struct object
*obj
, int verbose
)
282 fprintf( stderr
, "Mailslot writer\n" );
285 static void mail_writer_destroy( struct object
*obj
)
287 struct mail_writer
*writer
= (struct mail_writer
*) obj
;
289 list_remove( &writer
->entry
);
290 release_object( writer
->mailslot
);
293 static int mail_writer_get_info( struct fd
*fd
)
298 static struct fd
*mail_writer_get_fd( struct object
*obj
)
300 struct mail_writer
*writer
= (struct mail_writer
*) obj
;
302 return (struct fd
*)grab_object( writer
->mailslot
->write_fd
);
306 * Readers and writers cannot be mixed.
307 * If there's more than one writer, all writers must open with FILE_SHARE_WRITE
309 static struct mail_writer
*create_mail_writer( struct mailslot
*mailslot
, unsigned int access
,
310 unsigned int sharing
)
312 struct mail_writer
*writer
;
314 if (!list_empty( &mailslot
->writers
))
316 writer
= LIST_ENTRY( list_head(&mailslot
->writers
), struct mail_writer
, entry
);
318 if (((access
& GENERIC_WRITE
) || (writer
->access
& GENERIC_WRITE
)) &&
319 !((sharing
& FILE_SHARE_WRITE
) && (writer
->sharing
& FILE_SHARE_WRITE
)))
321 set_error( STATUS_SHARING_VIOLATION
);
326 writer
= alloc_object( &mail_writer_ops
);
330 grab_object( mailslot
);
331 writer
->mailslot
= mailslot
;
332 writer
->access
= access
;
333 writer
->sharing
= sharing
;
335 list_add_head( &mailslot
->writers
, &writer
->entry
);
340 static struct mailslot
*get_mailslot_obj( struct process
*process
, obj_handle_t handle
,
341 unsigned int access
)
344 obj
= get_handle_obj( process
, handle
, access
, &mailslot_ops
);
345 return (struct mailslot
*) obj
;
349 /* create a mailslot */
350 DECL_HANDLER(create_mailslot
)
352 struct mailslot
*mailslot
;
355 mailslot
= create_mailslot( get_req_data(), get_req_data_size(), req
->attributes
,
356 req
->max_msgsize
, req
->read_timeout
);
359 reply
->handle
= alloc_handle( current
->process
, mailslot
,
360 req
->access
, req
->attributes
& OBJ_INHERIT
);
361 release_object( mailslot
);
366 /* open an existing mailslot */
367 DECL_HANDLER(open_mailslot
)
369 struct mailslot
*mailslot
;
373 if (!(req
->sharing
& FILE_SHARE_READ
))
375 set_error( STATUS_SHARING_VIOLATION
);
379 mailslot
= open_mailslot( get_req_data(), get_req_data_size(), req
->attributes
);
382 struct mail_writer
*writer
;
384 writer
= create_mail_writer( mailslot
, req
->access
, req
->sharing
);
387 reply
->handle
= alloc_handle( current
->process
, writer
,
388 req
->access
, req
->attributes
& OBJ_INHERIT
);
389 release_object( writer
);
391 release_object( mailslot
);
394 set_error( STATUS_NO_SUCH_FILE
);
398 /* set mailslot information */
399 DECL_HANDLER(set_mailslot_info
)
401 struct mailslot
*mailslot
= get_mailslot_obj( current
->process
, req
->handle
, 0 );
405 if (req
->flags
& MAILSLOT_SET_READ_TIMEOUT
)
406 mailslot
->read_timeout
= req
->read_timeout
;
407 reply
->max_msgsize
= mailslot
->max_msgsize
;
408 reply
->read_timeout
= mailslot
->read_timeout
;
409 reply
->msg_count
= mailslot_message_count(mailslot
);
411 /* get the size of the next message */
412 if (reply
->msg_count
)
413 reply
->next_msgsize
= mailslot_next_msg_size(mailslot
);
415 reply
->next_msgsize
= MAILSLOT_NO_MESSAGE
;
417 release_object( mailslot
);