/* * Server-side mailslot management * * Copyright (C) 1998 Alexandre Julliard * Copyright (C) 2005 Mike McCormack * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA * */ #include "config.h" #include "wine/port.h" #include "ntstatus.h" #define WIN32_NO_STATUS #include "wine/unicode.h" #include <assert.h> #include <fcntl.h> #include <string.h> #include <stdarg.h> #include <stdio.h> #include <stdlib.h> #include <sys/time.h> #include <sys/types.h> #ifdef HAVE_SYS_IOCTL_H #include <sys/ioctl.h> #endif #ifdef HAVE_SYS_SOCKET_H #include <sys/socket.h> #endif #ifdef HAVE_SYS_FILIO_H #include <sys/filio.h> #endif #include "windef.h" #include "winternl.h" #include "file.h" #include "handle.h" #include "thread.h" #include "request.h" struct mailslot { struct object obj; struct fd *fd; int write_fd; unsigned int max_msgsize; timeout_t read_timeout; struct list writers; }; /* mailslot functions */ static void mailslot_dump( struct object*, int ); static struct fd *mailslot_get_fd( struct object * ); static unsigned int mailslot_map_access( struct object *obj, unsigned int access ); static int mailslot_link_name( struct object *obj, struct object_name *name, struct object *parent ); static struct object *mailslot_open_file( struct object *obj, unsigned int access, unsigned int sharing, unsigned int options ); static void mailslot_destroy( struct object * ); static const struct object_ops mailslot_ops = { sizeof(struct mailslot), /* size */ mailslot_dump, /* dump */ no_get_type, /* get_type */ add_queue, /* add_queue */ remove_queue, /* remove_queue */ default_fd_signaled, /* signaled */ no_satisfied, /* satisfied */ no_signal, /* signal */ mailslot_get_fd, /* get_fd */ mailslot_map_access, /* map_access */ default_get_sd, /* get_sd */ default_set_sd, /* set_sd */ no_lookup_name, /* lookup_name */ mailslot_link_name, /* link_name */ default_unlink_name, /* unlink_name */ mailslot_open_file, /* open_file */ fd_close_handle, /* close_handle */ mailslot_destroy /* destroy */ }; static enum server_fd_type mailslot_get_fd_type( struct fd *fd ); static void mailslot_queue_async( struct fd *fd, struct async *async, int type, int count ); static const struct fd_ops mailslot_fd_ops = { default_fd_get_poll_events, /* get_poll_events */ default_poll_event, /* poll_event */ mailslot_get_fd_type, /* get_fd_type */ no_fd_read, /* read */ no_fd_write, /* write */ no_fd_flush, /* flush */ default_fd_ioctl, /* ioctl */ mailslot_queue_async, /* queue_async */ default_fd_reselect_async /* reselect_async */ }; struct mail_writer { struct object obj; struct fd *fd; struct mailslot *mailslot; struct list entry; unsigned int access; unsigned int sharing; }; static void mail_writer_dump( struct object *obj, int verbose ); static struct fd *mail_writer_get_fd( struct object *obj ); static unsigned int mail_writer_map_access( struct object *obj, unsigned int access ); static void mail_writer_destroy( struct object *obj); static const struct object_ops mail_writer_ops = { sizeof(struct mail_writer), /* size */ mail_writer_dump, /* dump */ no_get_type, /* get_type */ no_add_queue, /* add_queue */ NULL, /* remove_queue */ NULL, /* signaled */ NULL, /* satisfied */ no_signal, /* signal */ mail_writer_get_fd, /* get_fd */ mail_writer_map_access, /* map_access */ default_get_sd, /* get_sd */ default_set_sd, /* set_sd */ no_lookup_name, /* lookup_name */ no_link_name, /* link_name */ NULL, /* unlink_name */ no_open_file, /* open_file */ fd_close_handle, /* close_handle */ mail_writer_destroy /* destroy */ }; static enum server_fd_type mail_writer_get_fd_type( struct fd *fd ); static const struct fd_ops mail_writer_fd_ops = { default_fd_get_poll_events, /* get_poll_events */ default_poll_event, /* poll_event */ mail_writer_get_fd_type, /* get_fd_type */ no_fd_read, /* read */ no_fd_write, /* write */ no_fd_flush, /* flush */ default_fd_ioctl, /* ioctl */ default_fd_queue_async, /* queue_async */ default_fd_reselect_async /* reselect_async */ }; struct mailslot_device { struct object obj; /* object header */ struct fd *fd; /* pseudo-fd for ioctls */ struct namespace *mailslots; /* mailslot namespace */ }; static void mailslot_device_dump( struct object *obj, int verbose ); static struct object_type *mailslot_device_get_type( struct object *obj ); static struct fd *mailslot_device_get_fd( struct object *obj ); static struct object *mailslot_device_lookup_name( struct object *obj, struct unicode_str *name, unsigned int attr ); static struct object *mailslot_device_open_file( struct object *obj, unsigned int access, unsigned int sharing, unsigned int options ); static void mailslot_device_destroy( struct object *obj ); static enum server_fd_type mailslot_device_get_fd_type( struct fd *fd ); static const struct object_ops mailslot_device_ops = { sizeof(struct mailslot_device), /* size */ mailslot_device_dump, /* dump */ mailslot_device_get_type, /* get_type */ no_add_queue, /* add_queue */ NULL, /* remove_queue */ NULL, /* signaled */ no_satisfied, /* satisfied */ no_signal, /* signal */ mailslot_device_get_fd, /* get_fd */ no_map_access, /* map_access */ default_get_sd, /* get_sd */ default_set_sd, /* set_sd */ mailslot_device_lookup_name, /* lookup_name */ directory_link_name, /* link_name */ default_unlink_name, /* unlink_name */ mailslot_device_open_file, /* open_file */ fd_close_handle, /* close_handle */ mailslot_device_destroy /* destroy */ }; static const struct fd_ops mailslot_device_fd_ops = { default_fd_get_poll_events, /* get_poll_events */ default_poll_event, /* poll_event */ mailslot_device_get_fd_type, /* get_fd_type */ no_fd_read, /* read */ no_fd_write, /* write */ no_fd_flush, /* flush */ default_fd_ioctl, /* ioctl */ default_fd_queue_async, /* queue_async */ default_fd_reselect_async /* reselect_async */ }; static void mailslot_destroy( struct object *obj) { struct mailslot *mailslot = (struct mailslot *) obj; assert( mailslot->fd ); if (mailslot->write_fd != -1) { shutdown( mailslot->write_fd, SHUT_RDWR ); close( mailslot->write_fd ); } release_object( mailslot->fd ); } static void mailslot_dump( struct object *obj, int verbose ) { struct mailslot *mailslot = (struct mailslot *) obj; assert( obj->ops == &mailslot_ops ); fprintf( stderr, "Mailslot max_msgsize=%d read_timeout=%s\n", mailslot->max_msgsize, get_timeout_str(mailslot->read_timeout) ); } static enum server_fd_type mailslot_get_fd_type( struct fd *fd ) { return FD_TYPE_MAILSLOT; } static struct fd *mailslot_get_fd( struct object *obj ) { struct mailslot *mailslot = (struct mailslot *) obj; return (struct fd *)grab_object( mailslot->fd ); } static unsigned int mailslot_map_access( struct object *obj, unsigned int access ) { /* mailslots can only be read */ if (access & GENERIC_READ) access |= FILE_GENERIC_READ; if (access & GENERIC_ALL) access |= FILE_GENERIC_READ; return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL); } static int mailslot_link_name( struct object *obj, struct object_name *name, struct object *parent ) { struct mailslot_device *dev = (struct mailslot_device *)parent; if (parent->ops != &mailslot_device_ops) { set_error( STATUS_OBJECT_NAME_INVALID ); return 0; } namespace_add( dev->mailslots, name ); name->parent = grab_object( parent ); return 1; } static struct object *mailslot_open_file( struct object *obj, unsigned int access, unsigned int sharing, unsigned int options ) { struct mailslot *mailslot = (struct mailslot *)obj; struct mail_writer *writer; int unix_fd; if (!(sharing & FILE_SHARE_READ)) { set_error( STATUS_SHARING_VIOLATION ); return NULL; } if (!list_empty( &mailslot->writers )) { /* Readers and writers cannot be mixed. * If there's more than one writer, all writers must open with FILE_SHARE_WRITE */ writer = LIST_ENTRY( list_head(&mailslot->writers), struct mail_writer, entry ); if (((access & (GENERIC_WRITE|FILE_WRITE_DATA)) || (writer->access & FILE_WRITE_DATA)) && !((sharing & FILE_SHARE_WRITE) && (writer->sharing & FILE_SHARE_WRITE))) { set_error( STATUS_SHARING_VIOLATION ); return NULL; } } if ((unix_fd = dup( mailslot->write_fd )) == -1) { file_set_error(); return NULL; } if (!(writer = alloc_object( &mail_writer_ops ))) { close( unix_fd ); return NULL; } grab_object( mailslot ); writer->mailslot = mailslot; writer->access = mail_writer_map_access( &writer->obj, access ); writer->sharing = sharing; list_add_head( &mailslot->writers, &writer->entry ); if (!(writer->fd = create_anonymous_fd( &mail_writer_fd_ops, unix_fd, &writer->obj, options ))) { release_object( writer ); return NULL; } allow_fd_caching( writer->fd ); return &writer->obj; } static void mailslot_queue_async( struct fd *fd, struct async *async, int type, int count ) { struct mailslot *mailslot = get_fd_user( fd ); assert(mailslot->obj.ops == &mailslot_ops); if (fd_queue_async( fd, async, type )) { async_set_timeout( async, mailslot->read_timeout ? mailslot->read_timeout : -1, STATUS_IO_TIMEOUT ); set_error( STATUS_PENDING ); } } static void mailslot_device_dump( struct object *obj, int verbose ) { fputs( "Mailslot device\n", stderr ); } static struct object_type *mailslot_device_get_type( struct object *obj ) { static const WCHAR name[] = {'D','e','v','i','c','e'}; static const struct unicode_str str = { name, sizeof(name) }; return get_object_type( &str ); } static struct fd *mailslot_device_get_fd( struct object *obj ) { struct mailslot_device *device = (struct mailslot_device *)obj; return (struct fd *)grab_object( device->fd ); } static struct object *mailslot_device_lookup_name( struct object *obj, struct unicode_str *name, unsigned int attr ) { struct mailslot_device *device = (struct mailslot_device*)obj; struct object *found; assert( obj->ops == &mailslot_device_ops ); if (!name) return NULL; /* open the device itself */ if ((found = find_object( device->mailslots, name, attr | OBJ_CASE_INSENSITIVE ))) name->len = 0; return found; } static struct object *mailslot_device_open_file( struct object *obj, unsigned int access, unsigned int sharing, unsigned int options ) { return grab_object( obj ); } static void mailslot_device_destroy( struct object *obj ) { struct mailslot_device *device = (struct mailslot_device*)obj; assert( obj->ops == &mailslot_device_ops ); if (device->fd) release_object( device->fd ); free( device->mailslots ); } static enum server_fd_type mailslot_device_get_fd_type( struct fd *fd ) { return FD_TYPE_DEVICE; } struct object *create_mailslot_device( struct object *root, const struct unicode_str *name ) { struct mailslot_device *dev; if ((dev = create_named_object( root, &mailslot_device_ops, name, 0, NULL )) && get_error() != STATUS_OBJECT_NAME_EXISTS) { dev->mailslots = NULL; if (!(dev->fd = alloc_pseudo_fd( &mailslot_device_fd_ops, &dev->obj, 0 )) || !(dev->mailslots = create_namespace( 7 ))) { release_object( dev ); dev = NULL; } } return &dev->obj; } static struct mailslot *create_mailslot( struct object *root, const struct unicode_str *name, unsigned int attr, int max_msgsize, timeout_t read_timeout, const struct security_descriptor *sd ) { struct mailslot *mailslot; int fds[2]; if (!(mailslot = create_named_object( root, &mailslot_ops, name, attr, sd ))) return NULL; mailslot->fd = NULL; mailslot->write_fd = -1; mailslot->max_msgsize = max_msgsize; mailslot->read_timeout = read_timeout; list_init( &mailslot->writers ); if (!socketpair( PF_UNIX, SOCK_DGRAM, 0, fds )) { fcntl( fds[0], F_SETFL, O_NONBLOCK ); fcntl( fds[1], F_SETFL, O_NONBLOCK ); shutdown( fds[0], SHUT_RD ); mailslot->write_fd = fds[0]; if ((mailslot->fd = create_anonymous_fd( &mailslot_fd_ops, fds[1], &mailslot->obj, FILE_SYNCHRONOUS_IO_NONALERT ))) { allow_fd_caching( mailslot->fd ); return mailslot; } } else file_set_error(); release_object( mailslot ); return NULL; } static void mail_writer_dump( struct object *obj, int verbose ) { fprintf( stderr, "Mailslot writer\n" ); } static void mail_writer_destroy( struct object *obj) { struct mail_writer *writer = (struct mail_writer *) obj; if (writer->fd) release_object( writer->fd ); list_remove( &writer->entry ); release_object( writer->mailslot ); } static enum server_fd_type mail_writer_get_fd_type( struct fd *fd ) { return FD_TYPE_MAILSLOT; } static struct fd *mail_writer_get_fd( struct object *obj ) { struct mail_writer *writer = (struct mail_writer *) obj; return (struct fd *)grab_object( writer->fd ); } static unsigned int mail_writer_map_access( struct object *obj, unsigned int access ) { /* mailslot writers can only get write access */ if (access & GENERIC_WRITE) access |= FILE_GENERIC_WRITE; if (access & GENERIC_ALL) access |= FILE_GENERIC_WRITE; return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL); } static struct mailslot *get_mailslot_obj( struct process *process, obj_handle_t handle, unsigned int access ) { return (struct mailslot *)get_handle_obj( process, handle, access, &mailslot_ops ); } /* create a mailslot */ DECL_HANDLER(create_mailslot) { struct mailslot *mailslot; struct unicode_str name; struct object *root; const struct security_descriptor *sd; const struct object_attributes *objattr = get_req_object_attributes( &sd, &name, &root ); if (!objattr) return; if (!name.len) /* mailslots need a root directory even without a name */ { if (!objattr->rootdir) { set_error( STATUS_OBJECT_PATH_SYNTAX_BAD ); return; } if (!(root = get_directory_obj( current->process, objattr->rootdir ))) return; } if ((mailslot = create_mailslot( root, &name, objattr->attributes, req->max_msgsize, req->read_timeout, sd ))) { reply->handle = alloc_handle( current->process, mailslot, req->access, objattr->attributes ); release_object( mailslot ); } if (root) release_object( root ); } /* set mailslot information */ DECL_HANDLER(set_mailslot_info) { struct mailslot *mailslot = get_mailslot_obj( current->process, req->handle, 0 ); if (mailslot) { if (req->flags & MAILSLOT_SET_READ_TIMEOUT) mailslot->read_timeout = req->read_timeout; reply->max_msgsize = mailslot->max_msgsize; reply->read_timeout = mailslot->read_timeout; release_object( mailslot ); } }