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wine/server/named_pipe.c

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/*
* Server-side pipe management
*
* Copyright (C) 1998 Alexandre Julliard
* Copyright (C) 2001 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
*
* TODO:
* message mode
*/
#include "config.h"
#include "wine/port.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_SOCKET_H
#include <sys/socket.h>
#endif
#include <time.h>
#include <unistd.h>
#ifdef HAVE_POLL_H
#include <poll.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "winioctl.h"
#include "file.h"
#include "handle.h"
#include "thread.h"
#include "request.h"
enum pipe_state
{
ps_idle_server,
ps_wait_open,
ps_connected_server,
ps_wait_disconnect,
ps_disconnected_server,
ps_wait_connect
};
struct named_pipe;
struct pipe_server
{
struct object obj; /* object header */
struct fd *fd; /* pipe file descriptor */
struct fd *ioctl_fd; /* file descriptor for ioctls when not connected */
struct list entry; /* entry in named pipe servers list */
enum pipe_state state; /* server state */
struct pipe_client *client; /* client that this server is connected to */
struct named_pipe *pipe;
struct timeout_user *flush_poll;
struct event *event;
unsigned int options; /* pipe options */
};
struct pipe_client
{
struct object obj; /* object header */
struct fd *fd; /* pipe file descriptor */
struct pipe_server *server; /* server that this client is connected to */
unsigned int flags; /* file flags */
};
struct named_pipe
{
struct object obj; /* object header */
unsigned int flags;
unsigned int maxinstances;
unsigned int outsize;
unsigned int insize;
unsigned int instances;
timeout_t timeout;
struct list servers; /* list of servers using this pipe */
struct async_queue *waiters; /* list of clients waiting to connect */
};
struct named_pipe_device
{
struct object obj; /* object header */
struct fd *fd; /* pseudo-fd for ioctls */
struct namespace *pipes; /* named pipe namespace */
};
static void named_pipe_dump( struct object *obj, int verbose );
static unsigned int named_pipe_map_access( struct object *obj, unsigned int access );
static struct object *named_pipe_open_file( struct object *obj, unsigned int access,
unsigned int sharing, unsigned int options );
static void named_pipe_destroy( struct object *obj );
static const struct object_ops named_pipe_ops =
{
sizeof(struct named_pipe), /* size */
named_pipe_dump, /* dump */
no_get_type, /* get_type */
no_add_queue, /* add_queue */
NULL, /* remove_queue */
NULL, /* signaled */
NULL, /* satisfied */
no_signal, /* signal */
no_get_fd, /* get_fd */
named_pipe_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
named_pipe_open_file, /* open_file */
no_close_handle, /* close_handle */
named_pipe_destroy /* destroy */
};
/* server end functions */
static void pipe_server_dump( struct object *obj, int verbose );
static struct fd *pipe_server_get_fd( struct object *obj );
static void pipe_server_destroy( struct object *obj);
static void pipe_server_flush( struct fd *fd, struct event **event );
static enum server_fd_type pipe_server_get_fd_type( struct fd *fd );
static obj_handle_t pipe_server_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async,
int blocking, const void *data, data_size_t size );
static const struct object_ops pipe_server_ops =
{
sizeof(struct pipe_server), /* size */
pipe_server_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 */
pipe_server_get_fd, /* get_fd */
default_fd_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_open_file, /* open_file */
fd_close_handle, /* close_handle */
pipe_server_destroy /* destroy */
};
static const struct fd_ops pipe_server_fd_ops =
{
default_fd_get_poll_events, /* get_poll_events */
default_poll_event, /* poll_event */
pipe_server_flush, /* flush */
pipe_server_get_fd_type, /* get_fd_type */
pipe_server_ioctl, /* ioctl */
default_fd_queue_async, /* queue_async */
default_fd_reselect_async, /* reselect_async */
default_fd_cancel_async, /* cancel_async */
};
/* client end functions */
static void pipe_client_dump( struct object *obj, int verbose );
static struct fd *pipe_client_get_fd( struct object *obj );
static void pipe_client_destroy( struct object *obj );
static void pipe_client_flush( struct fd *fd, struct event **event );
static enum server_fd_type pipe_client_get_fd_type( struct fd *fd );
static const struct object_ops pipe_client_ops =
{
sizeof(struct pipe_client), /* size */
pipe_client_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 */
pipe_client_get_fd, /* get_fd */
default_fd_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_open_file, /* open_file */
fd_close_handle, /* close_handle */
pipe_client_destroy /* destroy */
};
static const struct fd_ops pipe_client_fd_ops =
{
default_fd_get_poll_events, /* get_poll_events */
default_poll_event, /* poll_event */
pipe_client_flush, /* flush */
pipe_client_get_fd_type, /* get_fd_type */
default_fd_ioctl, /* ioctl */
default_fd_queue_async, /* queue_async */
default_fd_reselect_async, /* reselect_async */
default_fd_cancel_async /* cancel_async */
};
static void named_pipe_device_dump( struct object *obj, int verbose );
static struct object_type *named_pipe_device_get_type( struct object *obj );
static struct fd *named_pipe_device_get_fd( struct object *obj );
static struct object *named_pipe_device_lookup_name( struct object *obj,
struct unicode_str *name, unsigned int attr );
static struct object *named_pipe_device_open_file( struct object *obj, unsigned int access,
unsigned int sharing, unsigned int options );
static void named_pipe_device_destroy( struct object *obj );
static enum server_fd_type named_pipe_device_get_fd_type( struct fd *fd );
static obj_handle_t named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async_data,
int blocking, const void *data, data_size_t size );
static const struct object_ops named_pipe_device_ops =
{
sizeof(struct named_pipe_device), /* size */
named_pipe_device_dump, /* dump */
named_pipe_device_get_type, /* get_type */
no_add_queue, /* add_queue */
NULL, /* remove_queue */
NULL, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
named_pipe_device_get_fd, /* get_fd */
no_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
named_pipe_device_lookup_name, /* lookup_name */
named_pipe_device_open_file, /* open_file */
fd_close_handle, /* close_handle */
named_pipe_device_destroy /* destroy */
};
static const struct fd_ops named_pipe_device_fd_ops =
{
default_fd_get_poll_events, /* get_poll_events */
default_poll_event, /* poll_event */
no_flush, /* flush */
named_pipe_device_get_fd_type, /* get_fd_type */
named_pipe_device_ioctl, /* ioctl */
default_fd_queue_async, /* queue_async */
default_fd_reselect_async, /* reselect_async */
default_fd_cancel_async /* cancel_async */
};
static void named_pipe_dump( struct object *obj, int verbose )
{
struct named_pipe *pipe = (struct named_pipe *) obj;
assert( obj->ops == &named_pipe_ops );
fprintf( stderr, "Named pipe " );
dump_object_name( &pipe->obj );
fprintf( stderr, "\n" );
}
static unsigned int named_pipe_map_access( struct object *obj, unsigned int access )
{
if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ;
if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | FILE_CREATE_PIPE_INSTANCE;
if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
if (access & GENERIC_ALL) access |= STANDARD_RIGHTS_ALL;
return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
}
static void pipe_server_dump( struct object *obj, int verbose )
{
struct pipe_server *server = (struct pipe_server *) obj;
assert( obj->ops == &pipe_server_ops );
fprintf( stderr, "Named pipe server pipe=%p state=%d\n", server->pipe, server->state );
}
static void pipe_client_dump( struct object *obj, int verbose )
{
struct pipe_client *client = (struct pipe_client *) obj;
assert( obj->ops == &pipe_client_ops );
fprintf( stderr, "Named pipe client server=%p\n", client->server );
}
static void named_pipe_destroy( struct object *obj)
{
struct named_pipe *pipe = (struct named_pipe *) obj;
assert( list_empty( &pipe->servers ) );
assert( !pipe->instances );
free_async_queue( pipe->waiters );
}
static struct fd *pipe_client_get_fd( struct object *obj )
{
struct pipe_client *client = (struct pipe_client *) obj;
if (client->fd)
return (struct fd *) grab_object( client->fd );
set_error( STATUS_PIPE_DISCONNECTED );
return NULL;
}
static void set_server_state( struct pipe_server *server, enum pipe_state state )
{
server->state = state;
switch(state)
{
case ps_connected_server:
case ps_wait_disconnect:
assert( server->fd );
break;
case ps_wait_open:
case ps_idle_server:
assert( !server->fd );
set_no_fd_status( server->ioctl_fd, STATUS_PIPE_LISTENING );
break;
case ps_disconnected_server:
case ps_wait_connect:
assert( !server->fd );
set_no_fd_status( server->ioctl_fd, STATUS_PIPE_DISCONNECTED );
break;
}
}
static struct fd *pipe_server_get_fd( struct object *obj )
{
struct pipe_server *server = (struct pipe_server *) obj;
return (struct fd *)grab_object( server->fd ? server->fd : server->ioctl_fd );
}
static void notify_empty( struct pipe_server *server )
{
if (!server->flush_poll)
return;
assert( server->state == ps_connected_server );
assert( server->event );
remove_timeout_user( server->flush_poll );
server->flush_poll = NULL;
set_event( server->event );
release_object( server->event );
server->event = NULL;
}
static void do_disconnect( struct pipe_server *server )
{
/* we may only have a server fd, if the client disconnected */
if (server->client)
{
assert( server->client->server == server );
assert( server->client->fd );
release_object( server->client->fd );
server->client->fd = NULL;
}
assert( server->fd );
shutdown( get_unix_fd( server->fd ), SHUT_RDWR );
release_object( server->fd );
server->fd = NULL;
}
static void pipe_server_destroy( struct object *obj)
{
struct pipe_server *server = (struct pipe_server *)obj;
assert( obj->ops == &pipe_server_ops );
if (server->fd)
{
notify_empty( server );
do_disconnect( server );
}
if (server->client)
{
server->client->server = NULL;
server->client = NULL;
}
assert( server->pipe->instances );
server->pipe->instances--;
if (server->ioctl_fd) release_object( server->ioctl_fd );
list_remove( &server->entry );
release_object( server->pipe );
}
static void pipe_client_destroy( struct object *obj)
{
struct pipe_client *client = (struct pipe_client *)obj;
struct pipe_server *server = client->server;
assert( obj->ops == &pipe_client_ops );
if (server)
{
notify_empty( server );
switch(server->state)
{
case ps_connected_server:
/* Don't destroy the server's fd here as we can't
do a successful flush without it. */
set_server_state( server, ps_wait_disconnect );
break;
case ps_disconnected_server:
set_server_state( server, ps_wait_connect );
break;
case ps_idle_server:
case ps_wait_open:
case ps_wait_disconnect:
case ps_wait_connect:
assert( 0 );
}
assert( server->client );
server->client = NULL;
client->server = NULL;
}
if (client->fd) release_object( client->fd );
}
static void named_pipe_device_dump( struct object *obj, int verbose )
{
assert( obj->ops == &named_pipe_device_ops );
fprintf( stderr, "Named pipe device\n" );
}
static struct object_type *named_pipe_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 *named_pipe_device_get_fd( struct object *obj )
{
struct named_pipe_device *device = (struct named_pipe_device *)obj;
return (struct fd *)grab_object( device->fd );
}
static struct object *named_pipe_device_lookup_name( struct object *obj, struct unicode_str *name,
unsigned int attr )
{
struct named_pipe_device *device = (struct named_pipe_device*)obj;
struct object *found;
assert( obj->ops == &named_pipe_device_ops );
assert( device->pipes );
if ((found = find_object( device->pipes, name, attr | OBJ_CASE_INSENSITIVE )))
name->len = 0;
return found;
}
static struct object *named_pipe_device_open_file( struct object *obj, unsigned int access,
unsigned int sharing, unsigned int options )
{
return grab_object( obj );
}
static void named_pipe_device_destroy( struct object *obj )
{
struct named_pipe_device *device = (struct named_pipe_device*)obj;
assert( obj->ops == &named_pipe_device_ops );
if (device->fd) release_object( device->fd );
free( device->pipes );
}
static enum server_fd_type named_pipe_device_get_fd_type( struct fd *fd )
{
return FD_TYPE_DEVICE;
}
void create_named_pipe_device( struct directory *root, const struct unicode_str *name )
{
struct named_pipe_device *dev;
if ((dev = create_named_object_dir( root, name, 0, &named_pipe_device_ops )) &&
get_error() != STATUS_OBJECT_NAME_EXISTS)
{
dev->pipes = NULL;
if (!(dev->fd = alloc_pseudo_fd( &named_pipe_device_fd_ops, &dev->obj, 0 )) ||
!(dev->pipes = create_namespace( 7 )))
{
release_object( dev );
dev = NULL;
}
}
if (dev) make_object_static( &dev->obj );
}
static int pipe_data_remaining( struct pipe_server *server )
{
struct pollfd pfd;
int fd;
assert( server->client );
fd = get_unix_fd( server->client->fd );
if (fd < 0)
return 0;
pfd.fd = fd;
pfd.events = POLLIN;
pfd.revents = 0;
if (0 > poll( &pfd, 1, 0 ))
return 0;
return pfd.revents&POLLIN;
}
static void check_flushed( void *arg )
{
struct pipe_server *server = (struct pipe_server*) arg;
assert( server->event );
if (pipe_data_remaining( server ))
{
server->flush_poll = add_timeout_user( -TICKS_PER_SEC / 10, check_flushed, server );
}
else
{
/* notify_empty( server ); */
server->flush_poll = NULL;
set_event( server->event );
release_object( server->event );
server->event = NULL;
}
}
static void pipe_server_flush( struct fd *fd, struct event **event )
{
struct pipe_server *server = get_fd_user( fd );
if (!server || server->state != ps_connected_server) return;
/* FIXME: if multiple threads flush the same pipe,
maybe should create a list of processes to notify */
if (server->flush_poll) return;
if (pipe_data_remaining( server ))
{
/* this kind of sux -
there's no unix way to be alerted when a pipe becomes empty */
server->event = create_event( NULL, NULL, 0, 0, 0, NULL );
if (!server->event) return;
server->flush_poll = add_timeout_user( -TICKS_PER_SEC / 10, check_flushed, server );
*event = server->event;
}
}
static void pipe_client_flush( struct fd *fd, struct event **event )
{
/* FIXME: what do we have to do for this? */
}
static inline int is_overlapped( unsigned int options )
{
return !(options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT));
}
static enum server_fd_type pipe_server_get_fd_type( struct fd *fd )
{
return FD_TYPE_PIPE;
}
static enum server_fd_type pipe_client_get_fd_type( struct fd *fd )
{
return FD_TYPE_PIPE;
}
static obj_handle_t alloc_wait_event( struct process *process )
{
obj_handle_t handle = 0;
struct event *event = create_event( NULL, NULL, 0, 1, 0, NULL );
if (event)
{
handle = alloc_handle( process, event, EVENT_ALL_ACCESS, 0 );
release_object( event );
}
return handle;
}
static obj_handle_t pipe_server_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async_data,
int blocking, const void *data, data_size_t size )
{
struct pipe_server *server = get_fd_user( fd );
struct async *async;
obj_handle_t wait_handle = 0;
switch(code)
{
case FSCTL_PIPE_LISTEN:
switch(server->state)
{
case ps_idle_server:
case ps_wait_connect:
if (blocking && !is_overlapped( get_fd_options(fd) ))
{
async_data_t new_data = *async_data;
if (!(wait_handle = alloc_wait_event( current->process ))) break;
new_data.event = wait_handle;
if (!(async = fd_queue_async( server->ioctl_fd, &new_data, ASYNC_TYPE_WAIT )))
{
close_handle( current->process, wait_handle );
break;
}
}
else async = fd_queue_async( server->ioctl_fd, async_data, ASYNC_TYPE_WAIT );
if (async)
{
set_server_state( server, ps_wait_open );
if (server->pipe->waiters) async_wake_up( server->pipe->waiters, STATUS_SUCCESS );
release_object( async );
set_error( STATUS_PENDING );
return wait_handle;
}
break;
case ps_connected_server:
set_error( STATUS_PIPE_CONNECTED );
break;
case ps_disconnected_server:
set_error( STATUS_PIPE_BUSY );
break;
case ps_wait_disconnect:
set_error( STATUS_NO_DATA_DETECTED );
break;
case ps_wait_open:
set_error( STATUS_INVALID_HANDLE );
break;
}
return 0;
case FSCTL_PIPE_DISCONNECT:
switch(server->state)
{
case ps_connected_server:
assert( server->client );
assert( server->client->fd );
notify_empty( server );
/* dump the client and server fds, but keep the pointers
around - client loses all waiting data */
do_disconnect( server );
set_server_state( server, ps_disconnected_server );
break;
case ps_wait_disconnect:
assert( !server->client );
do_disconnect( server );
set_server_state( server, ps_wait_connect );
break;
case ps_idle_server:
case ps_wait_open:
set_error( STATUS_PIPE_LISTENING );
break;
case ps_disconnected_server:
case ps_wait_connect:
set_error( STATUS_PIPE_DISCONNECTED );
break;
}
return 0;
default:
return default_fd_ioctl( fd, code, async_data, blocking, data, size );
}
}
static struct named_pipe *create_named_pipe( struct directory *root, const struct unicode_str *name,
unsigned int attr )
{
struct object *obj;
struct named_pipe *pipe = NULL;
struct unicode_str new_name;
if (!name || !name->len) return alloc_object( &named_pipe_ops );
if (!(obj = find_object_dir( root, name, attr, &new_name )))
{
set_error( STATUS_OBJECT_NAME_INVALID );
return NULL;
}
if (!new_name.len)
{
if (attr & OBJ_OPENIF && obj->ops == &named_pipe_ops)
set_error( STATUS_OBJECT_NAME_EXISTS );
else
{
release_object( obj );
obj = NULL;
if (attr & OBJ_OPENIF)
set_error( STATUS_OBJECT_TYPE_MISMATCH );
else
set_error( STATUS_OBJECT_NAME_COLLISION );
}
return (struct named_pipe *)obj;
}
if (obj->ops != &named_pipe_device_ops)
set_error( STATUS_OBJECT_NAME_INVALID );
else
{
struct named_pipe_device *dev = (struct named_pipe_device *)obj;
if ((pipe = create_object( dev->pipes, &named_pipe_ops, &new_name, NULL )))
clear_error();
}
release_object( obj );
return pipe;
}
static struct pipe_server *get_pipe_server_obj( struct process *process,
obj_handle_t handle, unsigned int access )
{
struct object *obj;
obj = get_handle_obj( process, handle, access, &pipe_server_ops );
return (struct pipe_server *) obj;
}
static struct pipe_server *create_pipe_server( struct named_pipe *pipe, unsigned int options )
{
struct pipe_server *server;
server = alloc_object( &pipe_server_ops );
if (!server)
return NULL;
server->fd = NULL;
server->pipe = pipe;
server->client = NULL;
server->flush_poll = NULL;
server->options = options;
list_add_head( &pipe->servers, &server->entry );
grab_object( pipe );
if (!(server->ioctl_fd = alloc_pseudo_fd( &pipe_server_fd_ops, &server->obj, options )))
{
release_object( server );
return NULL;
}
set_server_state( server, ps_idle_server );
return server;
}
static struct pipe_client *create_pipe_client( unsigned int flags )
{
struct pipe_client *client;
client = alloc_object( &pipe_client_ops );
if (!client)
return NULL;
client->fd = NULL;
client->server = NULL;
client->flags = flags;
return client;
}
static struct pipe_server *find_available_server( struct named_pipe *pipe )
{
struct pipe_server *server;
/* look for pipe servers that are listening */
LIST_FOR_EACH_ENTRY( server, &pipe->servers, struct pipe_server, entry )
{
if (server->state == ps_wait_open)
return (struct pipe_server *)grab_object( server );
}
/* fall back to pipe servers that are idle */
LIST_FOR_EACH_ENTRY( server, &pipe->servers, struct pipe_server, entry )
{
if (server->state == ps_idle_server)
return (struct pipe_server *)grab_object( server );
}
return NULL;
}
static struct object *named_pipe_open_file( struct object *obj, unsigned int access,
unsigned int sharing, unsigned int options )
{
struct named_pipe *pipe = (struct named_pipe *)obj;
struct pipe_server *server;
struct pipe_client *client;
int fds[2];
if (!(server = find_available_server( pipe )))
{
set_error( STATUS_PIPE_NOT_AVAILABLE );
return NULL;
}
if ((client = create_pipe_client( options )))
{
if (!socketpair( PF_UNIX, SOCK_STREAM, 0, fds ))
{
assert( !server->fd );
/* for performance reasons, only set nonblocking mode when using
* overlapped I/O. Otherwise, we will be doing too much busy
* looping */
if (is_overlapped( options )) fcntl( fds[1], F_SETFL, O_NONBLOCK );
if (is_overlapped( server->options )) fcntl( fds[0], F_SETFL, O_NONBLOCK );
if (pipe->insize)
{
setsockopt( fds[0], SOL_SOCKET, SO_RCVBUF, &pipe->insize, sizeof(pipe->insize) );
setsockopt( fds[1], SOL_SOCKET, SO_RCVBUF, &pipe->insize, sizeof(pipe->insize) );
}
if (pipe->outsize)
{
setsockopt( fds[0], SOL_SOCKET, SO_SNDBUF, &pipe->outsize, sizeof(pipe->outsize) );
setsockopt( fds[1], SOL_SOCKET, SO_SNDBUF, &pipe->outsize, sizeof(pipe->outsize) );
}
client->fd = create_anonymous_fd( &pipe_client_fd_ops, fds[1], &client->obj, options );
server->fd = create_anonymous_fd( &pipe_server_fd_ops, fds[0], &server->obj, server->options );
if (client->fd && server->fd)
{
fd_copy_completion( server->ioctl_fd, server->fd );
if (server->state == ps_wait_open)
fd_async_wake_up( server->ioctl_fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
set_server_state( server, ps_connected_server );
server->client = client;
client->server = server;
}
else
{
release_object( client );
client = NULL;
}
}
else
{
file_set_error();
release_object( client );
client = NULL;
}
}
release_object( server );
return &client->obj;
}
static obj_handle_t named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async_data,
int blocking, const void *data, data_size_t size )
{
struct named_pipe_device *device = get_fd_user( fd );
switch(code)
{
case FSCTL_PIPE_WAIT:
{
const FILE_PIPE_WAIT_FOR_BUFFER *buffer = data;
obj_handle_t wait_handle = 0;
struct named_pipe *pipe;
struct pipe_server *server;
struct unicode_str name;
if (size < sizeof(*buffer) ||
size < FIELD_OFFSET(FILE_PIPE_WAIT_FOR_BUFFER, Name[buffer->NameLength/sizeof(WCHAR)]))
{
set_error( STATUS_INVALID_PARAMETER );
return 0;
}
name.str = buffer->Name;
name.len = (buffer->NameLength / sizeof(WCHAR)) * sizeof(WCHAR);
if (!(pipe = (struct named_pipe *)find_object( device->pipes, &name, OBJ_CASE_INSENSITIVE )))
{
set_error( STATUS_PIPE_NOT_AVAILABLE );
return 0;
}
if (!(server = find_available_server( pipe )))
{
struct async *async;
if (!pipe->waiters && !(pipe->waiters = create_async_queue( NULL ))) goto done;
if (blocking)
{
async_data_t new_data = *async_data;
if (!(wait_handle = alloc_wait_event( current->process ))) goto done;
new_data.event = wait_handle;
if (!(async = create_async( current, pipe->waiters, &new_data )))
{
close_handle( current->process, wait_handle );
wait_handle = 0;
}
}
else async = create_async( current, pipe->waiters, async_data );
if (async)
{
timeout_t when = buffer->TimeoutSpecified ? buffer->Timeout.QuadPart : pipe->timeout;
async_set_timeout( async, when, STATUS_IO_TIMEOUT );
release_object( async );
set_error( STATUS_PENDING );
}
}
else release_object( server );
done:
release_object( pipe );
return wait_handle;
}
default:
return default_fd_ioctl( fd, code, async_data, blocking, data, size );
}
}
DECL_HANDLER(create_named_pipe)
{
struct named_pipe *pipe;
struct pipe_server *server;
struct unicode_str name;
struct directory *root = NULL;
reply->handle = 0;
get_req_unicode_str( &name );
if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
return;
pipe = create_named_pipe( root, &name, req->attributes | OBJ_OPENIF );
if (root) release_object( root );
if (!pipe) return;
if (get_error() != STATUS_OBJECT_NAME_EXISTS)
{
/* initialize it if it didn't already exist */
pipe->instances = 0;
pipe->waiters = NULL;
list_init( &pipe->servers );
pipe->insize = req->insize;
pipe->outsize = req->outsize;
pipe->maxinstances = req->maxinstances;
pipe->timeout = req->timeout;
pipe->flags = req->flags;
}
else
{
if (pipe->maxinstances <= pipe->instances)
{
set_error( STATUS_INSTANCE_NOT_AVAILABLE );
release_object( pipe );
return;
}
if ((pipe->maxinstances != req->maxinstances) ||
(pipe->timeout != req->timeout) ||
(pipe->flags != req->flags))
{
set_error( STATUS_ACCESS_DENIED );
release_object( pipe );
return;
}
clear_error(); /* clear the name collision */
}
server = create_pipe_server( pipe, req->options );
if (server)
{
reply->handle = alloc_handle( current->process, server, req->access, req->attributes );
server->pipe->instances++;
release_object( server );
}
release_object( pipe );
}
DECL_HANDLER(get_named_pipe_info)
{
struct pipe_server *server;
struct pipe_client *client = NULL;
server = get_pipe_server_obj( current->process, req->handle, FILE_READ_ATTRIBUTES );
if (!server)
{
clear_error();
client = (struct pipe_client *)get_handle_obj( current->process, req->handle,
FILE_READ_ATTRIBUTES, &pipe_client_ops );
if (!client) return;
server = client->server;
}
reply->flags = server->pipe->flags;
reply->maxinstances = server->pipe->maxinstances;
reply->instances = server->pipe->instances;
reply->insize = server->pipe->insize;
reply->outsize = server->pipe->outsize;
if (client)
release_object(client);
else
{
reply->flags |= NAMED_PIPE_SERVER_END;
release_object(server);
}
}
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