466 lines
13 KiB
C
466 lines
13 KiB
C
/*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "wine/port.h"
|
|
#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 "winbase.h"
|
|
|
|
#include "file.h"
|
|
#include "handle.h"
|
|
#include "thread.h"
|
|
#include "request.h"
|
|
|
|
struct mailslot
|
|
{
|
|
struct object obj;
|
|
struct fd *fd;
|
|
struct fd *write_fd;
|
|
unsigned int max_msgsize;
|
|
unsigned int read_timeout;
|
|
struct list writers;
|
|
struct list read_q;
|
|
};
|
|
|
|
/* mailslot functions */
|
|
static void mailslot_dump( struct object*, int );
|
|
static struct fd *mailslot_get_fd( struct object * );
|
|
static void mailslot_destroy( struct object * );
|
|
|
|
static const struct object_ops mailslot_ops =
|
|
{
|
|
sizeof(struct mailslot), /* size */
|
|
mailslot_dump, /* dump */
|
|
default_fd_add_queue, /* add_queue */
|
|
default_fd_remove_queue, /* remove_queue */
|
|
default_fd_signaled, /* signaled */
|
|
no_satisfied, /* satisfied */
|
|
no_signal, /* signal */
|
|
mailslot_get_fd, /* get_fd */
|
|
mailslot_destroy /* destroy */
|
|
};
|
|
|
|
static int mailslot_get_poll_events( struct fd * );
|
|
static void mailslot_poll_event( struct fd *, int );
|
|
static int mailslot_get_info( struct fd * );
|
|
static void mailslot_queue_async( struct fd *, void*, void*, void*, int, int );
|
|
static void mailslot_cancel_async( struct fd * );
|
|
|
|
static const struct fd_ops mailslot_fd_ops =
|
|
{
|
|
mailslot_get_poll_events, /* get_poll_events */
|
|
mailslot_poll_event, /* poll_event */
|
|
no_flush, /* flush */
|
|
mailslot_get_info, /* get_file_info */
|
|
mailslot_queue_async, /* queue_async */
|
|
mailslot_cancel_async /* cancel_async */
|
|
};
|
|
|
|
struct mail_writer
|
|
{
|
|
struct object obj;
|
|
struct mailslot *mailslot;
|
|
struct list entry;
|
|
int access;
|
|
int sharing;
|
|
};
|
|
|
|
static void mail_writer_dump( struct object *obj, int verbose );
|
|
static struct fd *mail_writer_get_fd( struct object *obj );
|
|
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_add_queue, /* add_queue */
|
|
NULL, /* remove_queue */
|
|
NULL, /* signaled */
|
|
NULL, /* satisfied */
|
|
no_signal, /* signal */
|
|
mail_writer_get_fd, /* get_fd */
|
|
mail_writer_destroy /* destroy */
|
|
};
|
|
|
|
static int mail_writer_get_info( struct fd *fd );
|
|
|
|
static const struct fd_ops mail_writer_fd_ops =
|
|
{
|
|
NULL, /* get_poll_events */
|
|
NULL, /* poll_event */
|
|
no_flush, /* flush */
|
|
mail_writer_get_info, /* get_file_info */
|
|
no_queue_async, /* queue_async */
|
|
NULL /* cancel_async */
|
|
};
|
|
|
|
static void mailslot_destroy( struct object *obj)
|
|
{
|
|
struct mailslot *mailslot = (struct mailslot *) obj;
|
|
|
|
assert( mailslot->fd );
|
|
assert( mailslot->write_fd );
|
|
|
|
async_terminate_queue( &mailslot->read_q, STATUS_CANCELLED );
|
|
|
|
release_object( mailslot->fd );
|
|
release_object( mailslot->write_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=%d\n",
|
|
mailslot->max_msgsize, mailslot->read_timeout );
|
|
}
|
|
|
|
static int mailslot_message_count(struct mailslot *mailslot)
|
|
{
|
|
struct pollfd pfd;
|
|
|
|
/* poll the socket to see if there's any messages */
|
|
pfd.fd = get_unix_fd( mailslot->fd );
|
|
pfd.events = POLLIN;
|
|
pfd.revents = 0;
|
|
return (poll( &pfd, 1, 0 ) == 1) ? 1 : 0;
|
|
}
|
|
|
|
static int mailslot_next_msg_size( struct mailslot *mailslot )
|
|
{
|
|
int size, fd;
|
|
|
|
size = 0;
|
|
fd = get_unix_fd( mailslot->fd );
|
|
ioctl( fd, FIONREAD, &size );
|
|
return size;
|
|
}
|
|
|
|
static int mailslot_get_info( struct fd *fd )
|
|
{
|
|
struct mailslot *mailslot = get_fd_user( fd );
|
|
assert( mailslot->obj.ops == &mailslot_ops );
|
|
return FD_FLAG_TIMEOUT | FD_FLAG_AVAILABLE;
|
|
}
|
|
|
|
static struct fd *mailslot_get_fd( struct object *obj )
|
|
{
|
|
struct mailslot *mailslot = (struct mailslot *) obj;
|
|
|
|
return (struct fd *)grab_object( mailslot->fd );
|
|
}
|
|
|
|
static int mailslot_get_poll_events( struct fd *fd )
|
|
{
|
|
struct mailslot *mailslot = get_fd_user( fd );
|
|
int events = 0;
|
|
assert( mailslot->obj.ops == &mailslot_ops );
|
|
|
|
if( !list_empty( &mailslot->read_q ))
|
|
events |= POLLIN;
|
|
|
|
return events;
|
|
}
|
|
|
|
static void mailslot_poll_event( struct fd *fd, int event )
|
|
{
|
|
struct mailslot *mailslot = get_fd_user( fd );
|
|
|
|
if( !list_empty( &mailslot->read_q ) && (POLLIN & event) )
|
|
async_terminate_head( &mailslot->read_q, STATUS_ALERTED );
|
|
|
|
set_fd_events( fd, mailslot_get_poll_events(fd) );
|
|
}
|
|
|
|
static void mailslot_queue_async( struct fd *fd, void *apc, void *user,
|
|
void *iosb, int type, int count )
|
|
{
|
|
struct mailslot *mailslot = get_fd_user( fd );
|
|
int events, *ptimeout = NULL;
|
|
|
|
assert(mailslot->obj.ops == &mailslot_ops);
|
|
|
|
if( type != ASYNC_TYPE_READ )
|
|
{
|
|
set_error(STATUS_INVALID_PARAMETER);
|
|
return;
|
|
}
|
|
|
|
if( list_empty( &mailslot->writers ) ||
|
|
!mailslot_message_count( mailslot ))
|
|
{
|
|
set_error(STATUS_IO_TIMEOUT);
|
|
return;
|
|
}
|
|
|
|
if (mailslot->read_timeout != MAILSLOT_WAIT_FOREVER)
|
|
ptimeout = &mailslot->read_timeout;
|
|
|
|
if (!create_async( current, ptimeout, &mailslot->read_q, apc, user, iosb ))
|
|
return;
|
|
|
|
/* Check if the new pending request can be served immediately */
|
|
events = check_fd_events( fd, mailslot_get_poll_events( fd ) );
|
|
if (events)
|
|
{
|
|
mailslot_poll_event( fd, events );
|
|
return;
|
|
}
|
|
|
|
set_fd_events( fd, mailslot_get_poll_events( fd ));
|
|
}
|
|
|
|
static void mailslot_cancel_async( struct fd *fd )
|
|
{
|
|
struct mailslot *mailslot = get_fd_user( fd );
|
|
|
|
assert(mailslot->obj.ops == &mailslot_ops);
|
|
async_terminate_queue( &mailslot->read_q, STATUS_CANCELLED );
|
|
}
|
|
|
|
static struct mailslot *create_mailslot( const WCHAR *name, size_t len, int max_msgsize,
|
|
int read_timeout )
|
|
{
|
|
struct mailslot *mailslot;
|
|
int fds[2];
|
|
static const WCHAR slot[] = {'m','a','i','l','s','l','o','t','\\',0};
|
|
|
|
if( ( len <= strlenW( slot ) ) || strncmpiW( slot, name, strlenW( slot ) ) )
|
|
{
|
|
set_error( STATUS_OBJECT_NAME_INVALID );
|
|
return NULL;
|
|
}
|
|
|
|
mailslot = create_named_object( sync_namespace, &mailslot_ops, name, len );
|
|
if( !mailslot )
|
|
return NULL;
|
|
|
|
/* it already exists - there can only be one mailslot to read from */
|
|
if( get_error() == STATUS_OBJECT_NAME_COLLISION )
|
|
{
|
|
release_object( mailslot );
|
|
return NULL;
|
|
}
|
|
|
|
mailslot->fd = NULL;
|
|
mailslot->write_fd = NULL;
|
|
mailslot->max_msgsize = max_msgsize;
|
|
mailslot->read_timeout = read_timeout;
|
|
list_init( &mailslot->writers );
|
|
list_init( &mailslot->read_q );
|
|
|
|
if( !socketpair( PF_UNIX, SOCK_DGRAM, 0, fds ) )
|
|
{
|
|
fcntl( fds[0], F_SETFL, O_NONBLOCK );
|
|
fcntl( fds[1], F_SETFL, O_NONBLOCK );
|
|
mailslot->fd = create_anonymous_fd( &mailslot_fd_ops,
|
|
fds[1], &mailslot->obj );
|
|
mailslot->write_fd = create_anonymous_fd( &mail_writer_fd_ops,
|
|
fds[0], &mailslot->obj );
|
|
if( mailslot->fd && mailslot->write_fd ) return mailslot;
|
|
}
|
|
else file_set_error();
|
|
|
|
release_object( mailslot );
|
|
return NULL;
|
|
}
|
|
|
|
static struct mailslot *open_mailslot( const WCHAR *name, size_t len )
|
|
{
|
|
struct object *obj;
|
|
|
|
obj = find_object( sync_namespace, name, len );
|
|
if (obj)
|
|
{
|
|
if (obj->ops == &mailslot_ops)
|
|
return (struct mailslot *)obj;
|
|
release_object( obj );
|
|
set_error( STATUS_OBJECT_TYPE_MISMATCH );
|
|
}
|
|
else
|
|
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
|
|
|
|
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;
|
|
|
|
list_remove( &writer->entry );
|
|
release_object( writer->mailslot );
|
|
}
|
|
|
|
static int mail_writer_get_info( struct fd *fd )
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct fd *mail_writer_get_fd( struct object *obj )
|
|
{
|
|
struct mail_writer *writer = (struct mail_writer *) obj;
|
|
|
|
return (struct fd *)grab_object( writer->mailslot->write_fd );
|
|
}
|
|
|
|
/*
|
|
* Readers and writers cannot be mixed.
|
|
* If there's more than one writer, all writers must open with FILE_SHARE_WRITE
|
|
*/
|
|
static struct mail_writer *create_mail_writer( struct mailslot *mailslot, unsigned int access,
|
|
unsigned int sharing )
|
|
{
|
|
struct mail_writer *writer;
|
|
|
|
if (!list_empty( &mailslot->writers ))
|
|
{
|
|
writer = LIST_ENTRY( list_head(&mailslot->writers), struct mail_writer, entry );
|
|
|
|
if (((access & GENERIC_WRITE) || (writer->access & GENERIC_WRITE)) &&
|
|
!((sharing & FILE_SHARE_WRITE) && (writer->sharing & FILE_SHARE_WRITE)))
|
|
{
|
|
set_error( STATUS_SHARING_VIOLATION );
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
writer = alloc_object( &mail_writer_ops );
|
|
if (!writer)
|
|
return NULL;
|
|
|
|
grab_object( mailslot );
|
|
writer->mailslot = mailslot;
|
|
writer->access = access;
|
|
writer->sharing = sharing;
|
|
|
|
list_add_head( &mailslot->writers, &writer->entry );
|
|
|
|
return writer;
|
|
}
|
|
|
|
static struct mailslot *get_mailslot_obj( struct process *process, obj_handle_t handle,
|
|
unsigned int access )
|
|
{
|
|
struct object *obj;
|
|
obj = get_handle_obj( process, handle, access, &mailslot_ops );
|
|
return (struct mailslot *) obj;
|
|
}
|
|
|
|
|
|
/* create a mailslot */
|
|
DECL_HANDLER(create_mailslot)
|
|
{
|
|
struct mailslot *mailslot;
|
|
|
|
reply->handle = 0;
|
|
mailslot = create_mailslot( get_req_data(), get_req_data_size(),
|
|
req->max_msgsize, req->read_timeout );
|
|
if( mailslot )
|
|
{
|
|
reply->handle = alloc_handle( current->process, mailslot,
|
|
GENERIC_READ, req->inherit );
|
|
release_object( mailslot );
|
|
}
|
|
}
|
|
|
|
|
|
/* open an existing mailslot */
|
|
DECL_HANDLER(open_mailslot)
|
|
{
|
|
struct mailslot *mailslot;
|
|
|
|
reply->handle = 0;
|
|
|
|
if( ! ( req->sharing & FILE_SHARE_READ ) )
|
|
{
|
|
set_error( STATUS_SHARING_VIOLATION );
|
|
return;
|
|
}
|
|
|
|
mailslot = open_mailslot( get_req_data(), get_req_data_size() );
|
|
if( mailslot )
|
|
{
|
|
struct mail_writer *writer;
|
|
|
|
writer = create_mail_writer( mailslot, req->access, req->sharing );
|
|
if( writer )
|
|
{
|
|
reply->handle = alloc_handle( current->process, writer,
|
|
req->access, req->inherit );
|
|
release_object( writer );
|
|
}
|
|
release_object( mailslot );
|
|
}
|
|
else
|
|
set_error( STATUS_NO_SUCH_FILE );
|
|
}
|
|
|
|
|
|
/* 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;
|
|
reply->msg_count = mailslot_message_count(mailslot);
|
|
|
|
/* get the size of the next message */
|
|
if( reply->msg_count )
|
|
reply->next_msgsize = mailslot_next_msg_size(mailslot);
|
|
else
|
|
reply->next_msgsize = MAILSLOT_NO_MESSAGE;
|
|
|
|
release_object( mailslot );
|
|
}
|
|
}
|