499 lines
16 KiB
C
499 lines
16 KiB
C
/*
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* Server-side mailslot management
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*
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* Copyright (C) 1998 Alexandre Julliard
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* Copyright (C) 2005 Mike McCormack
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*
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*/
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#include "config.h"
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#include "wine/port.h"
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "wine/unicode.h"
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#include <assert.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_SYS_FILIO_H
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#include <sys/filio.h>
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#endif
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#include "windef.h"
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#include "winternl.h"
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#include "file.h"
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#include "handle.h"
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#include "thread.h"
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#include "request.h"
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struct mailslot
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{
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struct object obj;
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struct fd *fd;
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struct fd *write_fd;
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unsigned int max_msgsize;
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int read_timeout;
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struct list writers;
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};
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/* mailslot functions */
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static void mailslot_dump( struct object*, int );
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static struct fd *mailslot_get_fd( struct object * );
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static unsigned int mailslot_map_access( struct object *obj, unsigned int access );
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static struct object *mailslot_open_file( struct object *obj, unsigned int access,
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unsigned int sharing, unsigned int options );
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static void mailslot_destroy( struct object * );
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static const struct object_ops mailslot_ops =
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{
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sizeof(struct mailslot), /* size */
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mailslot_dump, /* dump */
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default_fd_add_queue, /* add_queue */
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default_fd_remove_queue, /* remove_queue */
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default_fd_signaled, /* signaled */
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no_satisfied, /* satisfied */
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no_signal, /* signal */
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mailslot_get_fd, /* get_fd */
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mailslot_map_access, /* map_access */
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no_lookup_name, /* lookup_name */
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mailslot_open_file, /* open_file */
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fd_close_handle, /* close_handle */
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mailslot_destroy /* destroy */
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};
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static enum server_fd_type mailslot_get_info( struct fd *fd, int *flags );
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static void mailslot_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
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static const struct fd_ops mailslot_fd_ops =
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{
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default_fd_get_poll_events, /* get_poll_events */
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default_poll_event, /* poll_event */
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no_flush, /* flush */
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mailslot_get_info, /* get_file_info */
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mailslot_queue_async, /* queue_async */
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default_fd_cancel_async /* cancel_async */
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};
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struct mail_writer
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{
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struct object obj;
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struct mailslot *mailslot;
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struct list entry;
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unsigned int access;
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unsigned int sharing;
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};
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static void mail_writer_dump( struct object *obj, int verbose );
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static struct fd *mail_writer_get_fd( struct object *obj );
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static unsigned int mail_writer_map_access( struct object *obj, unsigned int access );
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static void mail_writer_destroy( struct object *obj);
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static const struct object_ops mail_writer_ops =
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{
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sizeof(struct mail_writer), /* size */
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mail_writer_dump, /* dump */
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no_add_queue, /* add_queue */
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NULL, /* remove_queue */
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NULL, /* signaled */
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NULL, /* satisfied */
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no_signal, /* signal */
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mail_writer_get_fd, /* get_fd */
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mail_writer_map_access, /* map_access */
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no_lookup_name, /* lookup_name */
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no_open_file, /* open_file */
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fd_close_handle, /* close_handle */
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mail_writer_destroy /* destroy */
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};
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static enum server_fd_type mail_writer_get_info( struct fd *fd, int *flags );
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static const struct fd_ops mail_writer_fd_ops =
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{
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NULL, /* get_poll_events */
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NULL, /* poll_event */
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no_flush, /* flush */
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mail_writer_get_info, /* get_file_info */
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no_queue_async, /* queue_async */
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NULL /* cancel_async */
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};
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struct mailslot_device
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{
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struct object obj; /* object header */
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struct fd *fd; /* pseudo-fd for ioctls */
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struct namespace *mailslots; /* mailslot namespace */
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};
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static void mailslot_device_dump( struct object *obj, int verbose );
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static struct fd *mailslot_device_get_fd( struct object *obj );
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static struct object *mailslot_device_lookup_name( struct object *obj, struct unicode_str *name,
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unsigned int attr );
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static struct object *mailslot_device_open_file( struct object *obj, unsigned int access,
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unsigned int sharing, unsigned int options );
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static void mailslot_device_destroy( struct object *obj );
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static enum server_fd_type mailslot_device_get_file_info( struct fd *fd, int *flags );
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static const struct object_ops mailslot_device_ops =
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{
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sizeof(struct mailslot_device), /* size */
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mailslot_device_dump, /* dump */
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no_add_queue, /* add_queue */
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NULL, /* remove_queue */
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NULL, /* signaled */
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no_satisfied, /* satisfied */
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no_signal, /* signal */
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mailslot_device_get_fd, /* get_fd */
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no_map_access, /* map_access */
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mailslot_device_lookup_name, /* lookup_name */
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mailslot_device_open_file, /* open_file */
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fd_close_handle, /* close_handle */
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mailslot_device_destroy /* destroy */
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};
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static const struct fd_ops mailslot_device_fd_ops =
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{
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default_fd_get_poll_events, /* get_poll_events */
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default_poll_event, /* poll_event */
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no_flush, /* flush */
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mailslot_device_get_file_info, /* get_file_info */
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default_fd_queue_async, /* queue_async */
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default_fd_cancel_async /* cancel_async */
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};
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static void mailslot_destroy( struct object *obj)
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{
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struct mailslot *mailslot = (struct mailslot *) obj;
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assert( mailslot->fd );
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assert( mailslot->write_fd );
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release_object( mailslot->fd );
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release_object( mailslot->write_fd );
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}
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static void mailslot_dump( struct object *obj, int verbose )
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{
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struct mailslot *mailslot = (struct mailslot *) obj;
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assert( obj->ops == &mailslot_ops );
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fprintf( stderr, "Mailslot max_msgsize=%d read_timeout=%d\n",
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mailslot->max_msgsize, mailslot->read_timeout );
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}
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static enum server_fd_type mailslot_get_info( struct fd *fd, int *flags )
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{
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struct mailslot *mailslot = get_fd_user( fd );
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assert( mailslot->obj.ops == &mailslot_ops );
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*flags = FD_FLAG_TIMEOUT | FD_FLAG_AVAILABLE;
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return FD_TYPE_MAILSLOT;
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}
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static struct fd *mailslot_get_fd( struct object *obj )
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{
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struct mailslot *mailslot = (struct mailslot *) obj;
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return (struct fd *)grab_object( mailslot->fd );
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}
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static unsigned int mailslot_map_access( struct object *obj, unsigned int access )
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{
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/* mailslots can only be read */
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if (access & GENERIC_READ) access |= FILE_GENERIC_READ;
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if (access & GENERIC_ALL) access |= FILE_GENERIC_READ;
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return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
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}
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static struct object *mailslot_open_file( struct object *obj, unsigned int access,
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unsigned int sharing, unsigned int options )
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{
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struct mailslot *mailslot = (struct mailslot *)obj;
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struct mail_writer *writer;
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if (!(sharing & FILE_SHARE_READ))
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{
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set_error( STATUS_SHARING_VIOLATION );
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return NULL;
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}
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if (!list_empty( &mailslot->writers ))
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{
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/* Readers and writers cannot be mixed.
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* If there's more than one writer, all writers must open with FILE_SHARE_WRITE
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*/
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writer = LIST_ENTRY( list_head(&mailslot->writers), struct mail_writer, entry );
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if (((access & (GENERIC_WRITE|FILE_WRITE_DATA)) || (writer->access & FILE_WRITE_DATA)) &&
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!((sharing & FILE_SHARE_WRITE) && (writer->sharing & FILE_SHARE_WRITE)))
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{
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set_error( STATUS_SHARING_VIOLATION );
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return NULL;
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}
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}
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if (!(writer = alloc_object( &mail_writer_ops ))) return NULL;
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grab_object( mailslot );
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writer->mailslot = mailslot;
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writer->access = mail_writer_map_access( &writer->obj, access );
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writer->sharing = sharing;
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list_add_head( &mailslot->writers, &writer->entry );
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return &writer->obj;
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}
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static void mailslot_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
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{
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struct mailslot *mailslot = get_fd_user( fd );
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struct async *async;
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assert(mailslot->obj.ops == &mailslot_ops);
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if ((async = fd_queue_async( fd, data, type, count )))
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{
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if (mailslot->read_timeout != -1)
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{
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struct timeval when = current_time;
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add_timeout( &when, max(1,mailslot->read_timeout) );
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async_set_timeout( async, &when, STATUS_IO_TIMEOUT );
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}
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release_object( async );
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set_error( STATUS_PENDING );
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}
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}
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static void mailslot_device_dump( struct object *obj, int verbose )
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{
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assert( obj->ops == &mailslot_device_ops );
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fprintf( stderr, "Mail slot device\n" );
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}
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static struct fd *mailslot_device_get_fd( struct object *obj )
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{
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struct mailslot_device *device = (struct mailslot_device *)obj;
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return (struct fd *)grab_object( device->fd );
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}
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static struct object *mailslot_device_lookup_name( struct object *obj, struct unicode_str *name,
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unsigned int attr )
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{
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struct mailslot_device *device = (struct mailslot_device*)obj;
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struct object *found;
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assert( obj->ops == &mailslot_device_ops );
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if ((found = find_object( device->mailslots, name, attr | OBJ_CASE_INSENSITIVE )))
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name->len = 0;
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return found;
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}
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static struct object *mailslot_device_open_file( struct object *obj, unsigned int access,
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unsigned int sharing, unsigned int options )
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{
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return grab_object( obj );
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}
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static void mailslot_device_destroy( struct object *obj )
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{
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struct mailslot_device *device = (struct mailslot_device*)obj;
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assert( obj->ops == &mailslot_device_ops );
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if (device->fd) release_object( device->fd );
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free( device->mailslots );
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}
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static enum server_fd_type mailslot_device_get_file_info( struct fd *fd, int *flags )
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{
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*flags = 0;
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return FD_TYPE_DEVICE;
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}
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void create_mailslot_device( struct directory *root, const struct unicode_str *name )
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{
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struct mailslot_device *dev;
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if ((dev = create_named_object_dir( root, name, 0, &mailslot_device_ops )) &&
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get_error() != STATUS_OBJECT_NAME_EXISTS)
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{
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dev->mailslots = NULL;
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if (!(dev->fd = alloc_pseudo_fd( &mailslot_device_fd_ops, &dev->obj )) ||
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!(dev->mailslots = create_namespace( 7 )))
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{
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release_object( dev );
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dev = NULL;
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}
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}
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if (dev) make_object_static( &dev->obj );
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}
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static struct mailslot *create_mailslot( struct directory *root,
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const struct unicode_str *name, unsigned int attr,
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int max_msgsize, int read_timeout )
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{
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struct object *obj;
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struct unicode_str new_name;
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struct mailslot_device *dev;
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struct mailslot *mailslot;
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int fds[2];
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if (!name || !name->len) return alloc_object( &mailslot_ops );
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if (!(obj = find_object_dir( root, name, attr, &new_name )))
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{
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set_error( STATUS_OBJECT_NAME_INVALID );
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return NULL;
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}
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if (!new_name.len)
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{
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if (attr & OBJ_OPENIF && obj->ops == &mailslot_ops)
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/* it already exists - there can only be one mailslot to read from */
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set_error( STATUS_OBJECT_NAME_EXISTS );
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else if (attr & OBJ_OPENIF)
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set_error( STATUS_OBJECT_TYPE_MISMATCH );
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else
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set_error( STATUS_OBJECT_NAME_COLLISION );
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release_object( obj );
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return NULL;
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}
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if (obj->ops != &mailslot_device_ops)
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{
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set_error( STATUS_OBJECT_NAME_INVALID );
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release_object( obj );
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return NULL;
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}
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dev = (struct mailslot_device *)obj;
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mailslot = create_object( dev->mailslots, &mailslot_ops, &new_name, NULL );
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release_object( dev );
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if (!mailslot) return NULL;
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mailslot->fd = NULL;
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mailslot->write_fd = NULL;
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mailslot->max_msgsize = max_msgsize;
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mailslot->read_timeout = read_timeout;
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list_init( &mailslot->writers );
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if (!socketpair( PF_UNIX, SOCK_DGRAM, 0, fds ))
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{
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fcntl( fds[0], F_SETFL, O_NONBLOCK );
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fcntl( fds[1], F_SETFL, O_NONBLOCK );
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mailslot->fd = create_anonymous_fd( &mailslot_fd_ops,
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fds[1], &mailslot->obj );
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mailslot->write_fd = create_anonymous_fd( &mail_writer_fd_ops,
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fds[0], &mailslot->obj );
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if (mailslot->fd && mailslot->write_fd) return mailslot;
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}
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else file_set_error();
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release_object( mailslot );
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return NULL;
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}
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static void mail_writer_dump( struct object *obj, int verbose )
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{
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fprintf( stderr, "Mailslot writer\n" );
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}
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static void mail_writer_destroy( struct object *obj)
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{
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struct mail_writer *writer = (struct mail_writer *) obj;
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list_remove( &writer->entry );
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release_object( writer->mailslot );
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}
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static enum server_fd_type mail_writer_get_info( struct fd *fd, int *flags )
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{
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*flags = 0;
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return FD_TYPE_MAILSLOT;
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}
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static struct fd *mail_writer_get_fd( struct object *obj )
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{
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struct mail_writer *writer = (struct mail_writer *) obj;
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return (struct fd *)grab_object( writer->mailslot->write_fd );
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}
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static unsigned int mail_writer_map_access( struct object *obj, unsigned int access )
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{
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/* mailslot writers can only get write access */
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if (access & GENERIC_WRITE) access |= FILE_GENERIC_WRITE;
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if (access & GENERIC_ALL) access |= FILE_GENERIC_WRITE;
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return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
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}
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static struct mailslot *get_mailslot_obj( struct process *process, obj_handle_t handle,
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unsigned int access )
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{
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return (struct mailslot *)get_handle_obj( process, handle, access, &mailslot_ops );
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}
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/* create a mailslot */
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DECL_HANDLER(create_mailslot)
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{
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struct mailslot *mailslot;
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struct unicode_str name;
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struct directory *root = NULL;
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reply->handle = 0;
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get_req_unicode_str( &name );
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if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
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return;
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if ((mailslot = create_mailslot( root, &name, req->attributes, req->max_msgsize,
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req->read_timeout )))
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{
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reply->handle = alloc_handle( current->process, mailslot, req->access, req->attributes );
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release_object( mailslot );
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}
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if (root) release_object( root );
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}
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/* set mailslot information */
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DECL_HANDLER(set_mailslot_info)
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{
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struct mailslot *mailslot = get_mailslot_obj( current->process, req->handle, 0 );
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if (mailslot)
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{
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if (req->flags & MAILSLOT_SET_READ_TIMEOUT)
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mailslot->read_timeout = req->read_timeout;
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reply->max_msgsize = mailslot->max_msgsize;
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reply->read_timeout = mailslot->read_timeout;
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release_object( mailslot );
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}
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}
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