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Sweden-Number/server/named_pipe.c

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/*
* Server-side pipe management
*
* Copyright (C) 1998 Alexandre Julliard
* Copyright (C) 2001 Mike McCormack
* Copyright 2016 Jacek Caban for CodeWeavers
*
* 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 <assert.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#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"
#include "security.h"
#include "process.h"
struct named_pipe;
struct pipe_message
{
struct list entry; /* entry in message queue */
data_size_t read_pos; /* already read bytes */
struct iosb *iosb; /* message iosb */
struct async *async; /* async of pending write */
};
struct pipe_end
{
struct object obj; /* object header */
struct fd *fd; /* pipe file descriptor */
unsigned int flags; /* pipe flags */
unsigned int state; /* pipe state */
struct named_pipe *pipe;
struct pipe_end *connection; /* the other end of the pipe */
process_id_t client_pid; /* process that created the client */
process_id_t server_pid; /* process that created the server */
data_size_t buffer_size;/* size of buffered data that doesn't block caller */
struct list message_queue;
struct async_queue read_q; /* read queue */
struct async_queue write_q; /* write queue */
};
struct pipe_server
{
struct pipe_end pipe_end; /* common header for both pipe ends */
struct list entry; /* entry in named pipe listeners list */
unsigned int options; /* pipe options */
struct async_queue listen_q; /* listen queue */
};
struct named_pipe
{
struct object obj; /* object header */
int message_mode;
unsigned int sharing;
unsigned int maxinstances;
unsigned int outsize;
unsigned int insize;
unsigned int instances;
timeout_t timeout;
struct list listeners; /* list of servers listening on this pipe */
struct async_queue waiters; /* list of clients waiting to connect */
};
struct named_pipe_device
{
struct object obj; /* object header */
struct namespace *pipes; /* named pipe namespace */
};
struct named_pipe_device_file
{
struct object obj; /* object header */
struct fd *fd; /* pseudo-fd for ioctls */
struct named_pipe_device *device; /* named pipe device */
};
static void named_pipe_dump( struct object *obj, int verbose );
static unsigned int named_pipe_map_access( struct object *obj, unsigned int access );
static int named_pipe_link_name( struct object *obj, struct object_name *name, struct object *parent );
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_link_name, /* link_name */
default_unlink_name, /* unlink_name */
named_pipe_open_file, /* open_file */
no_kernel_obj_list, /* get_kernel_obj_list */
no_close_handle, /* close_handle */
named_pipe_destroy /* destroy */
};
/* common server and client pipe end functions */
static void pipe_end_destroy( struct object *obj );
static enum server_fd_type pipe_end_get_fd_type( struct fd *fd );
static struct fd *pipe_end_get_fd( struct object *obj );
static struct security_descriptor *pipe_end_get_sd( struct object *obj );
static int pipe_end_set_sd( struct object *obj, const struct security_descriptor *sd,
unsigned int set_info );
static int pipe_end_read( struct fd *fd, struct async *async, file_pos_t pos );
static int pipe_end_write( struct fd *fd, struct async *async_data, file_pos_t pos );
static int pipe_end_flush( struct fd *fd, struct async *async );
static void pipe_end_get_volume_info( struct fd *fd, unsigned int info_class );
static void pipe_end_reselect_async( struct fd *fd, struct async_queue *queue );
static void pipe_end_get_file_info( struct fd *fd, obj_handle_t handle, unsigned int info_class );
/* server end functions */
static void pipe_server_dump( struct object *obj, int verbose );
static void pipe_server_destroy( struct object *obj);
static int pipe_server_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
static const struct object_ops pipe_server_ops =
{
sizeof(struct pipe_server), /* size */
pipe_server_dump, /* dump */
file_get_type, /* get_type */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
default_fd_signaled, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
pipe_end_get_fd, /* get_fd */
default_fd_map_access, /* map_access */
pipe_end_get_sd, /* get_sd */
pipe_end_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_link_name, /* link_name */
NULL, /* unlink_name */
no_open_file, /* open_file */
no_kernel_obj_list, /* get_kernel_obj_list */
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_end_get_fd_type, /* get_fd_type */
pipe_end_read, /* read */
pipe_end_write, /* write */
pipe_end_flush, /* flush */
pipe_end_get_file_info, /* get_file_info */
pipe_end_get_volume_info, /* get_volume_info */
pipe_server_ioctl, /* ioctl */
no_fd_queue_async, /* queue_async */
pipe_end_reselect_async /* reselect_async */
};
/* client end functions */
static void pipe_client_dump( struct object *obj, int verbose );
static int pipe_client_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
static const struct object_ops pipe_client_ops =
{
sizeof(struct pipe_end), /* size */
pipe_client_dump, /* dump */
file_get_type, /* get_type */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
default_fd_signaled, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
pipe_end_get_fd, /* get_fd */
default_fd_map_access, /* map_access */
pipe_end_get_sd, /* get_sd */
pipe_end_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_link_name, /* link_name */
NULL, /* unlink_name */
no_open_file, /* open_file */
no_kernel_obj_list, /* get_kernel_obj_list */
fd_close_handle, /* close_handle */
pipe_end_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_end_get_fd_type, /* get_fd_type */
pipe_end_read, /* read */
pipe_end_write, /* write */
pipe_end_flush, /* flush */
pipe_end_get_file_info, /* get_file_info */
pipe_end_get_volume_info, /* get_volume_info */
pipe_client_ioctl, /* ioctl */
no_fd_queue_async, /* queue_async */
pipe_end_reselect_async /* reselect_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 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 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 */
no_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 */
directory_link_name, /* link_name */
default_unlink_name, /* unlink_name */
named_pipe_device_open_file, /* open_file */
no_kernel_obj_list, /* get_kernel_obj_list */
no_close_handle, /* close_handle */
named_pipe_device_destroy /* destroy */
};
static void named_pipe_device_file_dump( struct object *obj, int verbose );
static struct fd *named_pipe_device_file_get_fd( struct object *obj );
static int named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
static enum server_fd_type named_pipe_device_file_get_fd_type( struct fd *fd );
static void named_pipe_device_file_destroy( struct object *obj );
static const struct object_ops named_pipe_device_file_ops =
{
sizeof(struct named_pipe_device_file), /* size */
named_pipe_device_file_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 */
named_pipe_device_file_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_link_name, /* link_name */
NULL, /* unlink_name */
no_open_file, /* open_file */
no_kernel_obj_list, /* get_kernel_obj_list */
fd_close_handle, /* close_handle */
named_pipe_device_file_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 */
named_pipe_device_file_get_fd_type, /* get_fd_type */
no_fd_read, /* read */
no_fd_write, /* write */
no_fd_flush, /* flush */
default_fd_get_file_info, /* get_file_info */
no_fd_get_volume_info, /* get_volume_info */
named_pipe_device_ioctl, /* ioctl */
default_fd_queue_async, /* queue_async */
default_fd_reselect_async /* reselect_async */
};
static void named_pipe_dump( struct object *obj, int verbose )
{
fputs( "Named pipe\n", stderr );
}
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_end.pipe,
server->pipe_end.state );
}
static void pipe_client_dump( struct object *obj, int verbose )
{
struct pipe_end *client = (struct pipe_end *) obj;
assert( obj->ops == &pipe_client_ops );
fprintf( stderr, "Named pipe client server=%p\n", client->connection );
}
static void named_pipe_destroy( struct object *obj)
{
struct named_pipe *pipe = (struct named_pipe *) obj;
assert( list_empty( &pipe->listeners ) );
assert( !pipe->instances );
free_async_queue( &pipe->waiters );
}
static struct fd *pipe_end_get_fd( struct object *obj )
{
struct pipe_end *pipe_end = (struct pipe_end *) obj;
return (struct fd *) grab_object( pipe_end->fd );
}
static struct pipe_message *queue_message( struct pipe_end *pipe_end, struct iosb *iosb )
{
struct pipe_message *message;
if (!(message = mem_alloc( sizeof(*message) ))) return NULL;
message->iosb = (struct iosb *)grab_object( iosb );
message->async = NULL;
message->read_pos = 0;
list_add_tail( &pipe_end->message_queue, &message->entry );
return message;
}
static void wake_message( struct pipe_message *message, data_size_t result )
{
struct async *async = message->async;
message->async = NULL;
if (!async) return;
message->iosb->status = STATUS_SUCCESS;
message->iosb->result = result;
async_terminate( async, message->iosb->result ? STATUS_ALERTED : STATUS_SUCCESS );
release_object( async );
}
static void free_message( struct pipe_message *message )
{
list_remove( &message->entry );
if (message->iosb) release_object( message->iosb );
free( message );
}
static void pipe_end_disconnect( struct pipe_end *pipe_end, unsigned int status )
{
struct pipe_end *connection = pipe_end->connection;
struct pipe_message *message, *next;
struct async *async;
pipe_end->connection = NULL;
pipe_end->state = status == STATUS_PIPE_DISCONNECTED
? FILE_PIPE_DISCONNECTED_STATE : FILE_PIPE_CLOSING_STATE;
fd_async_wake_up( pipe_end->fd, ASYNC_TYPE_WAIT, status );
async_wake_up( &pipe_end->read_q, status );
LIST_FOR_EACH_ENTRY_SAFE( message, next, &pipe_end->message_queue, struct pipe_message, entry )
{
async = message->async;
if (async || status == STATUS_PIPE_DISCONNECTED) free_message( message );
if (!async) continue;
async_terminate( async, status );
release_object( async );
}
if (status == STATUS_PIPE_DISCONNECTED) set_fd_signaled( pipe_end->fd, 0 );
if (connection)
{
connection->connection = NULL;
pipe_end_disconnect( connection, status );
}
}
static void pipe_end_destroy( struct object *obj )
{
struct pipe_end *pipe_end = (struct pipe_end *)obj;
struct pipe_message *message;
pipe_end_disconnect( pipe_end, STATUS_PIPE_BROKEN );
while (!list_empty( &pipe_end->message_queue ))
{
message = LIST_ENTRY( list_head(&pipe_end->message_queue), struct pipe_message, entry );
assert( !message->async );
free_message( message );
}
free_async_queue( &pipe_end->read_q );
free_async_queue( &pipe_end->write_q );
if (pipe_end->fd) release_object( pipe_end->fd );
if (pipe_end->pipe) release_object( pipe_end->pipe );
}
static void pipe_server_destroy( struct object *obj )
{
struct pipe_server *server = (struct pipe_server *)obj;
struct named_pipe *pipe = server->pipe_end.pipe;
assert( obj->ops == &pipe_server_ops );
assert( pipe->instances );
if (!--pipe->instances) unlink_named_object( &pipe->obj );
if (server->pipe_end.state == FILE_PIPE_LISTENING_STATE)
list_remove( &server->entry );
free_async_queue( &server->listen_q );
pipe_end_destroy( obj );
}
static void named_pipe_device_dump( struct object *obj, int verbose )
{
fputs( "Named pipe device\n", stderr );
}
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 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 (!name) return NULL; /* open the device itself */
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 )
{
struct named_pipe_device_file *file;
if (!(file = alloc_object( &named_pipe_device_file_ops ))) return NULL;
file->device = (struct named_pipe_device *)grab_object( obj );
if (!(file->fd = alloc_pseudo_fd( &named_pipe_device_fd_ops, obj, options )))
{
release_object( file );
return NULL;
}
allow_fd_caching( file->fd );
return &file->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 );
free( device->pipes );
}
struct object *create_named_pipe_device( struct object *root, const struct unicode_str *name )
{
struct named_pipe_device *dev;
if ((dev = create_named_object( root, &named_pipe_device_ops, name, 0, NULL )) &&
get_error() != STATUS_OBJECT_NAME_EXISTS)
{
dev->pipes = NULL;
if (!(dev->pipes = create_namespace( 7 )))
{
release_object( dev );
dev = NULL;
}
}
return &dev->obj;
}
static void named_pipe_device_file_dump( struct object *obj, int verbose )
{
struct named_pipe_device_file *file = (struct named_pipe_device_file *)obj;
fprintf( stderr, "File on named pipe device %p\n", file->device );
}
static struct fd *named_pipe_device_file_get_fd( struct object *obj )
{
struct named_pipe_device_file *file = (struct named_pipe_device_file *)obj;
return (struct fd *)grab_object( file->fd );
}
static enum server_fd_type named_pipe_device_file_get_fd_type( struct fd *fd )
{
return FD_TYPE_DEVICE;
}
static void named_pipe_device_file_destroy( struct object *obj )
{
struct named_pipe_device_file *file = (struct named_pipe_device_file*)obj;
assert( obj->ops == &named_pipe_device_file_ops );
if (file->fd) release_object( file->fd );
release_object( file->device );
}
static int pipe_end_flush( struct fd *fd, struct async *async )
{
struct pipe_end *pipe_end = get_fd_user( fd );
if (!pipe_end->pipe)
{
set_error( STATUS_PIPE_DISCONNECTED );
return 0;
}
if (pipe_end->connection && !list_empty( &pipe_end->connection->message_queue ))
{
fd_queue_async( pipe_end->fd, async, ASYNC_TYPE_WAIT );
set_error( STATUS_PENDING );
}
return 1;
}
static void pipe_end_get_file_info( struct fd *fd, obj_handle_t handle, unsigned int info_class )
{
struct pipe_end *pipe_end = get_fd_user( fd );
struct named_pipe *pipe = pipe_end->pipe;
switch (info_class)
{
case FileNameInformation:
{
FILE_NAME_INFORMATION *name_info;
data_size_t name_len, reply_size;
const WCHAR *name;
if (get_reply_max_size() < sizeof(*name_info))
{
set_error( STATUS_INFO_LENGTH_MISMATCH );
return;
}
/* FIXME: We should be able to return on unlinked pipe */
if (!pipe || !(name = get_object_name( &pipe->obj, &name_len )))
{
set_error( STATUS_PIPE_DISCONNECTED );
return;
}
reply_size = offsetof( FILE_NAME_INFORMATION, FileName[name_len/sizeof(WCHAR) + 1] );
if (reply_size > get_reply_max_size())
{
reply_size = get_reply_max_size();
set_error( STATUS_BUFFER_OVERFLOW );
}
if (!(name_info = set_reply_data_size( reply_size ))) return;
name_info->FileNameLength = name_len + sizeof(WCHAR);
name_info->FileName[0] = '\\';
reply_size -= offsetof( FILE_NAME_INFORMATION, FileName[1] );
if (reply_size) memcpy( &name_info->FileName[1], name, reply_size );
break;
}
case FilePipeInformation:
{
FILE_PIPE_INFORMATION *pipe_info;
if (!(get_handle_access( current->process, handle) & FILE_READ_ATTRIBUTES))
{
set_error( STATUS_ACCESS_DENIED );
return;
}
if (get_reply_max_size() < sizeof(*pipe_info))
{
set_error( STATUS_INFO_LENGTH_MISMATCH );
return;
}
if (!pipe)
{
set_error( STATUS_PIPE_DISCONNECTED );
return;
}
if (!(pipe_info = set_reply_data_size( sizeof(*pipe_info) ))) return;
pipe_info->ReadMode = (pipe_end->flags & NAMED_PIPE_MESSAGE_STREAM_READ)
? FILE_PIPE_MESSAGE_MODE : FILE_PIPE_BYTE_STREAM_MODE;
pipe_info->CompletionMode = (pipe_end->flags & NAMED_PIPE_NONBLOCKING_MODE)
? FILE_PIPE_COMPLETE_OPERATION : FILE_PIPE_QUEUE_OPERATION;
break;
}
case FilePipeLocalInformation:
{
FILE_PIPE_LOCAL_INFORMATION *pipe_info;
if (!(get_handle_access( current->process, handle) & FILE_READ_ATTRIBUTES))
{
set_error( STATUS_ACCESS_DENIED );
return;
}
if (get_reply_max_size() < sizeof(*pipe_info))
{
set_error( STATUS_INFO_LENGTH_MISMATCH );
return;
}
if (!pipe)
{
set_error( STATUS_PIPE_DISCONNECTED );
return;
}
if (!(pipe_info = set_reply_data_size( sizeof(*pipe_info) ))) return;
pipe_info->NamedPipeType = pipe->message_mode;
switch (pipe->sharing)
{
case FILE_SHARE_READ:
pipe_info->NamedPipeConfiguration = FILE_PIPE_OUTBOUND;
break;
case FILE_SHARE_WRITE:
pipe_info->NamedPipeConfiguration = FILE_PIPE_INBOUND;
break;
case FILE_SHARE_READ | FILE_SHARE_WRITE:
pipe_info->NamedPipeConfiguration = FILE_PIPE_FULL_DUPLEX;
break;
}
pipe_info->MaximumInstances = pipe->maxinstances;
pipe_info->CurrentInstances = pipe->instances;
pipe_info->InboundQuota = pipe->insize;
pipe_info->ReadDataAvailable = 0; /* FIXME */
pipe_info->OutboundQuota = pipe->outsize;
pipe_info->WriteQuotaAvailable = 0; /* FIXME */
pipe_info->NamedPipeState = pipe_end->state;
pipe_info->NamedPipeEnd = pipe_end->obj.ops == &pipe_server_ops
? FILE_PIPE_SERVER_END : FILE_PIPE_CLIENT_END;
break;
}
default:
default_fd_get_file_info( fd, handle, info_class );
}
}
static struct security_descriptor *pipe_end_get_sd( struct object *obj )
{
struct pipe_end *pipe_end = (struct pipe_end *) obj;
if (pipe_end->pipe) return default_get_sd( &pipe_end->pipe->obj );
set_error( STATUS_PIPE_DISCONNECTED );
return NULL;
}
static int pipe_end_set_sd( struct object *obj, const struct security_descriptor *sd,
unsigned int set_info )
{
struct pipe_end *pipe_end = (struct pipe_end *) obj;
if (pipe_end->pipe) return default_set_sd( &pipe_end->pipe->obj, sd, set_info );
set_error( STATUS_PIPE_DISCONNECTED );
return 0;
}
static void pipe_end_get_volume_info( struct fd *fd, unsigned int info_class )
{
switch (info_class)
{
case FileFsDeviceInformation:
{
static const FILE_FS_DEVICE_INFORMATION device_info =
{
FILE_DEVICE_NAMED_PIPE,
FILE_DEVICE_ALLOW_APPCONTAINER_TRAVERSAL
};
if (get_reply_max_size() >= sizeof(device_info))
set_reply_data( &device_info, sizeof(device_info) );
else
set_error( STATUS_BUFFER_TOO_SMALL );
break;
}
default:
set_error( STATUS_NOT_IMPLEMENTED );
}
}
static void message_queue_read( struct pipe_end *pipe_end, struct iosb *iosb )
{
struct pipe_message *message;
if (pipe_end->flags & NAMED_PIPE_MESSAGE_STREAM_READ)
{
message = LIST_ENTRY( list_head(&pipe_end->message_queue), struct pipe_message, entry );
iosb->out_size = min( iosb->out_size, message->iosb->in_size - message->read_pos );
iosb->status = message->read_pos + iosb->out_size < message->iosb->in_size
? STATUS_BUFFER_OVERFLOW : STATUS_SUCCESS;
}
else
{
data_size_t avail = 0;
LIST_FOR_EACH_ENTRY( message, &pipe_end->message_queue, struct pipe_message, entry )
{
avail += message->iosb->in_size - message->read_pos;
if (avail >= iosb->out_size) break;
}
iosb->out_size = min( iosb->out_size, avail );
iosb->status = STATUS_SUCCESS;
}
message = LIST_ENTRY( list_head(&pipe_end->message_queue), struct pipe_message, entry );
if (!message->read_pos && message->iosb->in_size == iosb->out_size) /* fast path */
{
iosb->out_data = message->iosb->in_data;
message->iosb->in_data = NULL;
wake_message( message, message->iosb->in_size );
free_message( message );
}
else
{
data_size_t write_pos = 0, writing;
char *buf = NULL;
if (iosb->out_size && !(buf = iosb->out_data = malloc( iosb->out_size )))
{
iosb->out_size = 0;
iosb->status = STATUS_NO_MEMORY;
return;
}
do
{
message = LIST_ENTRY( list_head(&pipe_end->message_queue), struct pipe_message, entry );
writing = min( iosb->out_size - write_pos, message->iosb->in_size - message->read_pos );
if (writing) memcpy( buf + write_pos, (const char *)message->iosb->in_data + message->read_pos, writing );
write_pos += writing;
message->read_pos += writing;
if (message->read_pos == message->iosb->in_size)
{
wake_message(message, message->iosb->in_size);
free_message(message);
}
} while (write_pos < iosb->out_size);
}
iosb->result = iosb->out_size;
}
/* We call async_terminate in our reselect implementation, which causes recursive reselect.
* We're not interested in such reselect calls, so we ignore them. */
static int ignore_reselect;
static void reselect_write_queue( struct pipe_end *pipe_end );
static void reselect_read_queue( struct pipe_end *pipe_end, int reselect_write )
{
struct async *async;
struct iosb *iosb;
ignore_reselect = 1;
while (!list_empty( &pipe_end->message_queue ) && (async = find_pending_async( &pipe_end->read_q )))
{
iosb = async_get_iosb( async );
message_queue_read( pipe_end, iosb );
async_terminate( async, iosb->result ? STATUS_ALERTED : iosb->status );
release_object( async );
release_object( iosb );
reselect_write = 1;
}
ignore_reselect = 0;
if (pipe_end->connection)
{
if (list_empty( &pipe_end->message_queue ))
fd_async_wake_up( pipe_end->connection->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
else if (reselect_write)
reselect_write_queue( pipe_end->connection );
}
}
static void reselect_write_queue( struct pipe_end *pipe_end )
{
struct pipe_message *message, *next;
struct pipe_end *reader = pipe_end->connection;
data_size_t avail = 0;
if (!reader) return;
ignore_reselect = 1;
LIST_FOR_EACH_ENTRY_SAFE( message, next, &reader->message_queue, struct pipe_message, entry )
{
if (message->async && message->iosb->status != STATUS_PENDING)
{
release_object( message->async );
message->async = NULL;
free_message( message );
}
else
{
avail += message->iosb->in_size - message->read_pos;
if (message->async && (avail <= reader->buffer_size || !message->iosb->in_size))
{
wake_message( message, message->iosb->in_size );
}
else if (message->async && (pipe_end->flags & NAMED_PIPE_NONBLOCKING_MODE))
{
wake_message( message, message->read_pos );
free_message( message );
}
}
}
ignore_reselect = 0;
reselect_read_queue( reader, 0 );
}
static int pipe_end_read( struct fd *fd, struct async *async, file_pos_t pos )
{
struct pipe_end *pipe_end = get_fd_user( fd );
switch (pipe_end->state)
{
case FILE_PIPE_CONNECTED_STATE:
if ((pipe_end->flags & NAMED_PIPE_NONBLOCKING_MODE) && list_empty( &pipe_end->message_queue ))
{
set_error( STATUS_PIPE_EMPTY );
return 0;
}
break;
case FILE_PIPE_DISCONNECTED_STATE:
set_error( STATUS_PIPE_DISCONNECTED );
return 0;
case FILE_PIPE_LISTENING_STATE:
set_error( STATUS_PIPE_LISTENING );
return 0;
case FILE_PIPE_CLOSING_STATE:
if (!list_empty( &pipe_end->message_queue )) break;
set_error( STATUS_PIPE_BROKEN );
return 0;
}
queue_async( &pipe_end->read_q, async );
reselect_read_queue( pipe_end, 0 );
set_error( STATUS_PENDING );
return 1;
}
static int pipe_end_write( struct fd *fd, struct async *async, file_pos_t pos )
{
struct pipe_end *pipe_end = get_fd_user( fd );
struct pipe_message *message;
struct iosb *iosb;
switch (pipe_end->state)
{
case FILE_PIPE_CONNECTED_STATE:
break;
case FILE_PIPE_DISCONNECTED_STATE:
set_error( STATUS_PIPE_DISCONNECTED );
return 0;
case FILE_PIPE_LISTENING_STATE:
set_error( STATUS_PIPE_LISTENING );
return 0;
case FILE_PIPE_CLOSING_STATE:
set_error( STATUS_PIPE_CLOSING );
return 0;
}
if (!pipe_end->pipe->message_mode && !get_req_data_size()) return 1;
iosb = async_get_iosb( async );
message = queue_message( pipe_end->connection, iosb );
release_object( iosb );
if (!message) return 0;
message->async = (struct async *)grab_object( async );
queue_async( &pipe_end->write_q, async );
reselect_read_queue( pipe_end->connection, 1 );
set_error( STATUS_PENDING );
return 1;
}
static void pipe_end_reselect_async( struct fd *fd, struct async_queue *queue )
{
struct pipe_end *pipe_end = get_fd_user( fd );
if (ignore_reselect) return;
if (&pipe_end->write_q == queue)
reselect_write_queue( pipe_end );
else if (&pipe_end->read_q == queue)
reselect_read_queue( pipe_end, 0 );
}
static enum server_fd_type pipe_end_get_fd_type( struct fd *fd )
{
return FD_TYPE_PIPE;
}
static int pipe_end_peek( struct pipe_end *pipe_end )
{
unsigned reply_size = get_reply_max_size();
FILE_PIPE_PEEK_BUFFER *buffer;
struct pipe_message *message;
data_size_t avail = 0;
data_size_t message_length = 0;
if (reply_size < offsetof( FILE_PIPE_PEEK_BUFFER, Data ))
{
set_error( STATUS_INFO_LENGTH_MISMATCH );
return 0;
}
reply_size -= offsetof( FILE_PIPE_PEEK_BUFFER, Data );
switch (pipe_end->state)
{
case FILE_PIPE_CONNECTED_STATE:
break;
case FILE_PIPE_CLOSING_STATE:
if (!list_empty( &pipe_end->message_queue )) break;
set_error( STATUS_PIPE_BROKEN );
return 0;
default:
set_error( pipe_end->pipe ? STATUS_INVALID_PIPE_STATE : STATUS_PIPE_DISCONNECTED );
return 0;
}
LIST_FOR_EACH_ENTRY( message, &pipe_end->message_queue, struct pipe_message, entry )
avail += message->iosb->in_size - message->read_pos;
reply_size = min( reply_size, avail );
if (avail && pipe_end->pipe->message_mode)
{
message = LIST_ENTRY( list_head(&pipe_end->message_queue), struct pipe_message, entry );
message_length = message->iosb->in_size - message->read_pos;
reply_size = min( reply_size, message_length );
}
if (!(buffer = set_reply_data_size( offsetof( FILE_PIPE_PEEK_BUFFER, Data[reply_size] )))) return 0;
buffer->NamedPipeState = pipe_end->state;
buffer->ReadDataAvailable = avail;
buffer->NumberOfMessages = 0; /* FIXME */
buffer->MessageLength = message_length;
if (reply_size)
{
data_size_t write_pos = 0, writing;
LIST_FOR_EACH_ENTRY( message, &pipe_end->message_queue, struct pipe_message, entry )
{
writing = min( reply_size - write_pos, message->iosb->in_size - message->read_pos );
memcpy( buffer->Data + write_pos, (const char *)message->iosb->in_data + message->read_pos,
writing );
write_pos += writing;
if (write_pos == reply_size) break;
}
}
if (message_length > reply_size) set_error( STATUS_BUFFER_OVERFLOW );
return 1;
}
static int pipe_end_transceive( struct pipe_end *pipe_end, struct async *async )
{
struct pipe_message *message;
struct iosb *iosb;
if (!pipe_end->connection)
{
set_error( pipe_end->pipe ? STATUS_INVALID_PIPE_STATE : STATUS_PIPE_DISCONNECTED );
return 0;
}
if (!(pipe_end->flags & NAMED_PIPE_MESSAGE_STREAM_READ))
{
set_error( STATUS_INVALID_READ_MODE );
return 0;
}
/* not allowed if we already have read data buffered */
if (!list_empty( &pipe_end->message_queue ))
{
set_error( STATUS_PIPE_BUSY );
return 0;
}
iosb = async_get_iosb( async );
/* ignore output buffer copy transferred because of METHOD_NEITHER */
iosb->in_size -= iosb->out_size;
/* transaction never blocks on write, so just queue a message without async */
message = queue_message( pipe_end->connection, iosb );
release_object( iosb );
if (!message) return 0;
reselect_read_queue( pipe_end->connection, 0 );
queue_async( &pipe_end->read_q, async );
reselect_read_queue( pipe_end, 0 );
set_error( STATUS_PENDING );
return 1;
}
static int pipe_end_get_connection_attribute( struct pipe_end *pipe_end )
{
const char *attr = get_req_data();
data_size_t value_size, attr_size = get_req_data_size();
void *value;
if (attr_size == sizeof("ClientProcessId") && !memcmp( attr, "ClientProcessId", attr_size ))
{
value = &pipe_end->client_pid;
value_size = sizeof(pipe_end->client_pid);
}
else if (attr_size == sizeof("ServerProcessId") && !memcmp( attr, "ServerProcessId", attr_size ))
{
value = &pipe_end->server_pid;
value_size = sizeof(pipe_end->server_pid);
}
else
{
set_error( STATUS_ILLEGAL_FUNCTION );
return 0;
}
if (get_reply_max_size() < value_size)
{
set_error( STATUS_INFO_LENGTH_MISMATCH );
return 0;
}
set_reply_data( value, value_size );
return 1;
}
static int pipe_end_ioctl( struct pipe_end *pipe_end, ioctl_code_t code, struct async *async )
{
switch(code)
{
case FSCTL_PIPE_GET_CONNECTION_ATTRIBUTE:
return pipe_end_get_connection_attribute( pipe_end );
case FSCTL_PIPE_PEEK:
return pipe_end_peek( pipe_end );
case FSCTL_PIPE_TRANSCEIVE:
return pipe_end_transceive( pipe_end, async );
default:
return default_fd_ioctl( pipe_end->fd, code, async );
}
}
static int pipe_server_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
{
struct pipe_server *server = get_fd_user( fd );
switch(code)
{
case FSCTL_PIPE_LISTEN:
switch(server->pipe_end.state)
{
case FILE_PIPE_LISTENING_STATE:
break;
case FILE_PIPE_DISCONNECTED_STATE:
server->pipe_end.state = FILE_PIPE_LISTENING_STATE;
list_add_tail( &server->pipe_end.pipe->listeners, &server->entry );
break;
case FILE_PIPE_CONNECTED_STATE:
set_error( STATUS_PIPE_CONNECTED );
return 0;
case FILE_PIPE_CLOSING_STATE:
set_error( STATUS_PIPE_CLOSING );
return 0;
}
if (server->pipe_end.flags & NAMED_PIPE_NONBLOCKING_MODE)
{
set_error( STATUS_PIPE_LISTENING );
return 0;
}
queue_async( &server->listen_q, async );
async_wake_up( &server->pipe_end.pipe->waiters, STATUS_SUCCESS );
set_error( STATUS_PENDING );
return 1;
case FSCTL_PIPE_DISCONNECT:
switch(server->pipe_end.state)
{
case FILE_PIPE_CONNECTED_STATE:
/* dump the client connection - all data is lost */
assert( server->pipe_end.connection );
release_object( server->pipe_end.connection->pipe );
server->pipe_end.connection->pipe = NULL;
break;
case FILE_PIPE_CLOSING_STATE:
break;
case FILE_PIPE_LISTENING_STATE:
set_error( STATUS_PIPE_LISTENING );
return 0;
case FILE_PIPE_DISCONNECTED_STATE:
set_error( STATUS_PIPE_DISCONNECTED );
return 0;
}
pipe_end_disconnect( &server->pipe_end, STATUS_PIPE_DISCONNECTED );
return 1;
case FSCTL_PIPE_IMPERSONATE:
if (current->process->token) /* FIXME: use the client token */
{
struct token *token;
if (!(token = token_duplicate( current->process->token, 0, SecurityImpersonation, NULL )))
return 0;
if (current->token) release_object( current->token );
current->token = token;
}
return 1;
default:
return pipe_end_ioctl( &server->pipe_end, code, async );
}
}
static int pipe_client_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
{
struct pipe_end *client = get_fd_user( fd );
switch(code)
{
case FSCTL_PIPE_LISTEN:
set_error( STATUS_ILLEGAL_FUNCTION );
return 0;
default:
return pipe_end_ioctl( client, code, async );
}
}
static void init_pipe_end( struct pipe_end *pipe_end, struct named_pipe *pipe,
unsigned int pipe_flags, data_size_t buffer_size )
{
pipe_end->pipe = (struct named_pipe *)grab_object( pipe );
pipe_end->fd = NULL;
pipe_end->flags = pipe_flags;
pipe_end->connection = NULL;
pipe_end->buffer_size = buffer_size;
init_async_queue( &pipe_end->read_q );
init_async_queue( &pipe_end->write_q );
list_init( &pipe_end->message_queue );
}
static struct pipe_server *create_pipe_server( struct named_pipe *pipe, unsigned int options,
unsigned int pipe_flags )
{
struct pipe_server *server;
server = alloc_object( &pipe_server_ops );
if (!server)
return NULL;
server->options = options;
init_pipe_end( &server->pipe_end, pipe, pipe_flags, pipe->insize );
server->pipe_end.state = FILE_PIPE_LISTENING_STATE;
server->pipe_end.server_pid = get_process_id( current->process );
init_async_queue( &server->listen_q );
list_add_tail( &pipe->listeners, &server->entry );
if (!(server->pipe_end.fd = alloc_pseudo_fd( &pipe_server_fd_ops, &server->pipe_end.obj, options )))
{
release_object( server );
return NULL;
}
allow_fd_caching( server->pipe_end.fd );
set_fd_signaled( server->pipe_end.fd, 1 );
async_wake_up( &pipe->waiters, STATUS_SUCCESS );
return server;
}
static struct pipe_end *create_pipe_client( struct named_pipe *pipe, data_size_t buffer_size, unsigned int options )
{
struct pipe_end *client;
client = alloc_object( &pipe_client_ops );
if (!client)
return NULL;
init_pipe_end( client, pipe, 0, buffer_size );
client->state = FILE_PIPE_CONNECTED_STATE;
client->client_pid = get_process_id( current->process );
client->fd = alloc_pseudo_fd( &pipe_client_fd_ops, &client->obj, options );
if (!client->fd)
{
release_object( client );
return NULL;
}
allow_fd_caching( client->fd );
set_fd_signaled( client->fd, 1 );
return client;
}
static int named_pipe_link_name( struct object *obj, struct object_name *name, struct object *parent )
{
struct named_pipe_device *dev = (struct named_pipe_device *)parent;
if (parent->ops != &named_pipe_device_ops)
{
set_error( STATUS_OBJECT_NAME_INVALID );
return 0;
}
namespace_add( dev->pipes, name );
name->parent = grab_object( parent );
return 1;
}
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_end *client;
unsigned int pipe_sharing;
if (list_empty( &pipe->listeners ))
{
set_error( STATUS_PIPE_NOT_AVAILABLE );
return NULL;
}
server = LIST_ENTRY( list_head( &pipe->listeners ), struct pipe_server, entry );
pipe_sharing = pipe->sharing;
if (((access & GENERIC_READ) && !(pipe_sharing & FILE_SHARE_READ)) ||
((access & GENERIC_WRITE) && !(pipe_sharing & FILE_SHARE_WRITE)))
{
set_error( STATUS_ACCESS_DENIED );
return NULL;
}
if ((client = create_pipe_client( pipe, pipe->outsize, options )))
{
async_wake_up( &server->listen_q, STATUS_SUCCESS );
server->pipe_end.state = FILE_PIPE_CONNECTED_STATE;
server->pipe_end.connection = client;
client->connection = &server->pipe_end;
server->pipe_end.client_pid = client->client_pid;
client->server_pid = server->pipe_end.server_pid;
list_remove( &server->entry );
}
return &client->obj;
}
static int named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
{
struct named_pipe_device *device = get_fd_user( fd );
switch(code)
{
case FSCTL_PIPE_WAIT:
{
const FILE_PIPE_WAIT_FOR_BUFFER *buffer = get_req_data();
data_size_t size = get_req_data_size();
struct named_pipe *pipe;
struct unicode_str name;
timeout_t when;
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 = open_named_object( &device->obj, &named_pipe_ops, &name, 0 ))) return 0;
if (list_empty( &pipe->listeners ))
{
queue_async( &pipe->waiters, async );
when = buffer->TimeoutSpecified ? buffer->Timeout.QuadPart : pipe->timeout;
async_set_timeout( async, when, STATUS_IO_TIMEOUT );
set_error( STATUS_PENDING );
}
release_object( pipe );
return 1;
}
default:
return default_fd_ioctl( fd, code, async );
}
}
DECL_HANDLER(create_named_pipe)
{
struct named_pipe *pipe;
struct pipe_server *server;
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 (!req->sharing || (req->sharing & ~(FILE_SHARE_READ | FILE_SHARE_WRITE)) ||
(!(req->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE) && (req->flags & NAMED_PIPE_MESSAGE_STREAM_READ)))
{
if (root) release_object( root );
set_error( STATUS_INVALID_PARAMETER );
return;
}
if (!name.len) /* pipes 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;
}
pipe = create_named_object( root, &named_pipe_ops, &name, objattr->attributes | OBJ_OPENIF, NULL );
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;
init_async_queue( &pipe->waiters );
list_init( &pipe->listeners );
pipe->insize = req->insize;
pipe->outsize = req->outsize;
pipe->maxinstances = req->maxinstances;
pipe->timeout = req->timeout;
pipe->message_mode = (req->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE) != 0;
pipe->sharing = req->sharing;
if (sd) default_set_sd( &pipe->obj, sd, OWNER_SECURITY_INFORMATION |
GROUP_SECURITY_INFORMATION |
DACL_SECURITY_INFORMATION |
SACL_SECURITY_INFORMATION );
}
else
{
if (pipe->maxinstances <= pipe->instances)
{
set_error( STATUS_INSTANCE_NOT_AVAILABLE );
release_object( pipe );
return;
}
if (pipe->sharing != req->sharing)
{
set_error( STATUS_ACCESS_DENIED );
release_object( pipe );
return;
}
clear_error(); /* clear the name collision */
}
server = create_pipe_server( pipe, req->options, req->flags );
if (server)
{
reply->handle = alloc_handle( current->process, server, req->access, objattr->attributes );
pipe->instances++;
release_object( server );
}
release_object( pipe );
}
DECL_HANDLER(set_named_pipe_info)
{
struct pipe_end *pipe_end;
pipe_end = (struct pipe_end *)get_handle_obj( current->process, req->handle,
FILE_WRITE_ATTRIBUTES, &pipe_server_ops );
if (!pipe_end)
{
if (get_error() != STATUS_OBJECT_TYPE_MISMATCH)
return;
clear_error();
pipe_end = (struct pipe_end *)get_handle_obj( current->process, req->handle,
0, &pipe_client_ops );
if (!pipe_end) return;
}
if (!pipe_end->pipe)
{
set_error( STATUS_PIPE_DISCONNECTED );
}
else if ((req->flags & ~(NAMED_PIPE_MESSAGE_STREAM_READ | NAMED_PIPE_NONBLOCKING_MODE)) ||
((req->flags & NAMED_PIPE_MESSAGE_STREAM_READ) && !pipe_end->pipe->message_mode))
{
set_error( STATUS_INVALID_PARAMETER );
}
else
{
pipe_end->flags = req->flags;
}
release_object( pipe_end );
}
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