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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 <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"
#include "security.h"
enum pipe_state
{
ps_idle_server,
ps_wait_open,
ps_connected_server,
ps_wait_disconnect,
ps_wait_connect
};
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 */
struct pipe_end *connection; /* the other end of the pipe */
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 pipe_client and pipe_server */
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;
unsigned int options; /* pipe options */
};
struct pipe_client
{
struct pipe_end pipe_end; /* common header for pipe_client and pipe_server */
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 sharing;
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 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_close_handle, /* close_handle */
named_pipe_destroy /* destroy */
};
/* common server and client pipe end functions */
static obj_handle_t pipe_end_read( struct fd *fd, struct async *async, file_pos_t pos );
static obj_handle_t pipe_end_write( struct fd *fd, struct async *async_data, file_pos_t pos );
static void pipe_end_queue_async( struct fd *fd, struct async *async, int type, int count );
static void pipe_end_reselect_async( struct fd *fd, struct async_queue *queue );
/* 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 obj_handle_t pipe_server_flush( struct fd *fd, struct async *async );
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, struct async *async );
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_link_name, /* link_name */
NULL, /* unlink_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_get_fd_type, /* get_fd_type */
pipe_end_read, /* read */
pipe_end_write, /* write */
pipe_server_flush, /* flush */
pipe_server_ioctl, /* ioctl */
pipe_end_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_signaled( struct object *obj, struct wait_queue_entry *entry );
static struct fd *pipe_client_get_fd( struct object *obj );
static void pipe_client_destroy( struct object *obj );
static obj_handle_t pipe_client_flush( struct fd *fd, struct async *async );
static obj_handle_t pipe_client_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
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 */
pipe_client_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_link_name, /* link_name */
NULL, /* unlink_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_get_fd_type, /* get_fd_type */
pipe_end_read, /* read */
pipe_end_write, /* write */
pipe_client_flush, /* flush */
pipe_client_ioctl, /* ioctl */
pipe_end_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 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,
struct async *async );
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 */
directory_link_name, /* link_name */
default_unlink_name, /* unlink_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 */
named_pipe_device_get_fd_type, /* get_fd_type */
no_fd_read, /* read */
no_fd_write, /* write */
no_fd_flush, /* flush */
named_pipe_device_ioctl, /* ioctl */
default_fd_queue_async, /* queue_async */
default_fd_reselect_async /* reselect_async */
};
/* Returns if we handle I/O via server calls. Currently message-mode pipes are handled this way. */
static int use_server_io( struct pipe_end *pipe_end )
{
return pipe_end->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE;
}
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, 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 int pipe_client_signaled( struct object *obj, struct wait_queue_entry *entry )
{
struct pipe_client *client = (struct pipe_client *) obj;
return client->pipe_end.fd && is_fd_signaled(client->pipe_end.fd);
}
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->pipe_end.fd)
return (struct fd *) grab_object( client->pipe_end.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->pipe_end.fd );
break;
case ps_wait_open:
case ps_idle_server:
assert( !server->pipe_end.fd );
set_no_fd_status( server->ioctl_fd, STATUS_PIPE_LISTENING );
break;
case ps_wait_connect:
assert( !server->pipe_end.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->pipe_end.fd ? server->pipe_end.fd : server->ioctl_fd );
}
static void notify_empty( struct pipe_server *server )
{
if (!server->flush_poll)
return;
assert( server->state == ps_connected_server );
remove_timeout_user( server->flush_poll );
server->flush_poll = NULL;
fd_async_wake_up( server->pipe_end.fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
}
static void wake_message( struct pipe_message *message )
{
struct async *async = message->async;
message->async = NULL;
message->iosb->status = STATUS_SUCCESS;
message->iosb->result = message->iosb->in_size;
if (async)
{
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;
pipe_end->connection = NULL;
if (use_server_io( pipe_end ))
{
struct pipe_message *message, *next;
struct async *async;
if (pipe_end->fd) 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 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->pipe_end.fd );
if (!use_server_io( &server->pipe_end ))
{
release_object( server->client->pipe_end.fd );
server->client->pipe_end.fd = NULL;
}
}
assert( server->pipe_end.fd );
if (!use_server_io( &server->pipe_end ))
shutdown( get_unix_fd( server->pipe_end.fd ), SHUT_RDWR );
release_object( server->pipe_end.fd );
server->pipe_end.fd = NULL;
}
static void pipe_end_destroy( struct pipe_end *pipe_end )
{
struct pipe_message *message;
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 );
}
static void pipe_server_destroy( struct object *obj)
{
struct pipe_server *server = (struct pipe_server *)obj;
assert( obj->ops == &pipe_server_ops );
pipe_end_disconnect( &server->pipe_end, STATUS_PIPE_BROKEN );
if (server->pipe_end.fd)
{
notify_empty( server );
do_disconnect( server );
}
pipe_end_destroy( &server->pipe_end );
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 );
pipe_end_disconnect( &client->pipe_end, STATUS_PIPE_BROKEN );
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_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;
}
pipe_end_destroy( &client->pipe_end );
if (client->pipe_end.fd) release_object( client->pipe_end.fd );
}
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 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 (!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 )
{
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;
}
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->fd = alloc_pseudo_fd( &named_pipe_device_fd_ops, &dev->obj, 0 )) ||
!(dev->pipes = create_namespace( 7 )))
{
release_object( dev );
dev = NULL;
}
}
return &dev->obj;
}
static int pipe_data_remaining( struct pipe_server *server )
{
struct pollfd pfd;
int fd;
assert( server->client );
if (use_server_io( &server->pipe_end ))
return !list_empty( &server->client->pipe_end.message_queue );
fd = get_unix_fd( server->client->pipe_end.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;
if (pipe_data_remaining( server ))
{
server->flush_poll = add_timeout_user( -TICKS_PER_SEC / 10, check_flushed, server );
}
else
{
server->flush_poll = NULL;
fd_async_wake_up( server->pipe_end.fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
}
}
static obj_handle_t pipe_end_flush( struct pipe_end *pipe_end, struct async *async )
{
obj_handle_t handle = 0;
if (use_server_io( pipe_end ) && (!pipe_end->connection || list_empty( &pipe_end->connection->message_queue )))
return 0;
if (!fd_queue_async( pipe_end->fd, async, ASYNC_TYPE_WAIT )) return 0;
if (!async_is_blocking( async ) || (handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 )))
set_error( STATUS_PENDING );
return handle;
}
static obj_handle_t pipe_server_flush( struct fd *fd, struct async *async )
{
struct pipe_server *server = get_fd_user( fd );
obj_handle_t handle;
if (!server || server->state != ps_connected_server) return 0;
if (!pipe_data_remaining( server )) return 0;
handle = pipe_end_flush( &server->pipe_end, async );
/* there's no unix way to be alerted when a pipe becomes empty, so resort to polling */
if (handle && !use_server_io( &server->pipe_end ) && !server->flush_poll)
server->flush_poll = add_timeout_user( -TICKS_PER_SEC / 10, check_flushed, server );
return handle;
}
static obj_handle_t pipe_client_flush( struct fd *fd, struct async *async )
{
struct pipe_end *pipe_end = get_fd_user( fd );
/* FIXME: Support byte mode. */
return use_server_io( pipe_end ) ? pipe_end_flush( pipe_end, async ) : 0;
}
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 );
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);
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 )
{
struct async *async;
struct iosb *iosb;
int read_done = 0;
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 );
read_done = 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 (read_done)
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->iosb->status == STATUS_PENDING && (avail <= reader->buffer_size || !message->iosb->in_size))
wake_message( message );
}
}
ignore_reselect = 0;
reselect_read_queue( reader );
}
static obj_handle_t pipe_end_read( struct fd *fd, struct async *async, file_pos_t pos )
{
struct pipe_end *pipe_end = get_fd_user( fd );
obj_handle_t handle = 0;
if (!use_server_io( pipe_end )) return no_fd_read( fd, async, pos );
if (!pipe_end->connection && list_empty( &pipe_end->message_queue ))
{
set_error( STATUS_PIPE_BROKEN );
return 0;
}
if (!pipe_end->read_q && !(pipe_end->read_q = create_async_queue( fd ))) return 0;
if (!(handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 ))) return 0;
queue_async( pipe_end->read_q, async );
reselect_read_queue( pipe_end );
set_error( STATUS_PENDING );
if (!async_is_blocking( async ))
{
struct iosb *iosb;
iosb = async_get_iosb( async );
if (iosb->status == STATUS_PENDING)
{
close_handle( current->process, handle );
handle = 0;
}
release_object( iosb );
}
return handle;
}
static obj_handle_t pipe_end_write( struct fd *fd, struct async *async, file_pos_t pos )
{
struct pipe_end *write_end = get_fd_user( fd );
struct pipe_end *read_end = write_end->connection;
struct pipe_message *message;
obj_handle_t handle = 0;
if (!use_server_io( write_end )) return no_fd_write( fd, async, pos );
if (!read_end)
{
set_error( STATUS_PIPE_DISCONNECTED );
return 0;
}
if (!write_end->write_q && !(write_end->write_q = create_async_queue( fd ))) return 0;
if (!(handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 ))) return 0;
if (!(message = mem_alloc( sizeof(*message) )))
{
close_handle( current->process, handle );
return 0;
}
message->async = (struct async *)grab_object( async );
message->iosb = async_get_iosb( async );
message->read_pos = 0;
list_add_tail( &read_end->message_queue, &message->entry );
queue_async( write_end->write_q, async );
reselect_write_queue( write_end );
set_error( STATUS_PENDING );
if (!async_is_blocking( async ))
{
struct iosb *iosb;
iosb = async_get_iosb( async );
if (iosb->status == STATUS_PENDING)
{
close_handle( current->process, handle );
handle = 0;
}
release_object( iosb );
}
return handle;
}
static void pipe_end_queue_async( struct fd *fd, struct async *async, int type, int count )
{
struct pipe_end *pipe_end = get_fd_user( fd );
if (use_server_io( pipe_end )) no_fd_queue_async( fd, async, type, count );
else default_fd_queue_async( fd, async, type, count );
}
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 (!use_server_io( pipe_end ))
default_fd_reselect_async( fd, queue );
else if (pipe_end->write_q && pipe_end->write_q == queue)
reselect_write_queue( pipe_end );
else if (pipe_end->read_q && pipe_end->read_q == queue)
reselect_read_queue( pipe_end );
}
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 void 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;
if (!use_server_io( pipe_end ))
{
set_error( STATUS_NOT_SUPPORTED );
return;
}
if (reply_size < offsetof( FILE_PIPE_PEEK_BUFFER, Data ))
{
set_error( STATUS_INFO_LENGTH_MISMATCH );
return;
}
reply_size -= offsetof( FILE_PIPE_PEEK_BUFFER, Data );
LIST_FOR_EACH_ENTRY( message, &pipe_end->message_queue, struct pipe_message, entry )
avail += message->iosb->in_size - message->read_pos;
if (avail)
{
message = LIST_ENTRY( list_head(&pipe_end->message_queue), struct pipe_message, entry );
reply_size = min( reply_size, message->iosb->in_size - message->read_pos );
}
else reply_size = 0;
if (!(buffer = set_reply_data_size( offsetof( FILE_PIPE_PEEK_BUFFER, Data[reply_size] )))) return;
buffer->NamedPipeState = 0; /* FIXME */
buffer->ReadDataAvailable = avail;
buffer->NumberOfMessages = 0; /* FIXME */
buffer->MessageLength = 0; /* FIXME */
if (reply_size) memcpy( buffer->Data, (const char *)message->iosb->in_data + message->read_pos, reply_size );
}
static obj_handle_t pipe_server_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
{
struct pipe_server *server = get_fd_user( fd );
obj_handle_t wait_handle = 0;
switch(code)
{
case FSCTL_PIPE_LISTEN:
switch(server->state)
{
case ps_idle_server:
case ps_wait_connect:
if (fd_queue_async( server->ioctl_fd, async, ASYNC_TYPE_WAIT ))
{
if (async_is_blocking( async )) wait_handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
set_server_state( server, ps_wait_open );
if (server->pipe->waiters) async_wake_up( server->pipe->waiters, STATUS_SUCCESS );
set_error( STATUS_PENDING );
return wait_handle;
}
break;
case ps_connected_server:
set_error( STATUS_PIPE_CONNECTED );
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->pipe_end.fd );
notify_empty( server );
/* dump the client and server fds - client loses all waiting data */
pipe_end_disconnect( &server->pipe_end, STATUS_PIPE_DISCONNECTED );
do_disconnect( server );
server->client->server = NULL;
server->client = NULL;
set_server_state( server, ps_wait_connect );
break;
case ps_wait_disconnect:
assert( !server->client );
pipe_end_disconnect( &server->pipe_end, STATUS_PIPE_DISCONNECTED );
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_wait_connect:
set_error( STATUS_PIPE_DISCONNECTED );
break;
}
return 0;
case FSCTL_PIPE_PEEK:
pipe_end_peek( &server->pipe_end );
return 0;
default:
return default_fd_ioctl( fd, code, async );
}
}
static obj_handle_t pipe_client_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
{
struct pipe_client *client = get_fd_user( fd );
switch(code)
{
case FSCTL_PIPE_PEEK:
pipe_end_peek( &client->pipe_end );
return 0;
default:
return default_fd_ioctl( fd, code, async );
}
}
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 void init_pipe_end( struct pipe_end *pipe_end, unsigned int pipe_flags, data_size_t buffer_size )
{
pipe_end->fd = NULL;
pipe_end->flags = pipe_flags;
pipe_end->connection = NULL;
pipe_end->buffer_size = buffer_size;
pipe_end->read_q = NULL;
pipe_end->write_q = NULL;
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->pipe = pipe;
server->client = NULL;
server->flush_poll = NULL;
server->options = options;
init_pipe_end( &server->pipe_end, pipe_flags, pipe->insize );
list_add_head( &pipe->servers, &server->entry );
grab_object( pipe );
if (!(server->ioctl_fd = alloc_pseudo_fd( &pipe_server_fd_ops, &server->pipe_end.obj, options )))
{
release_object( server );
return NULL;
}
set_fd_signaled( server->ioctl_fd, 1 );
set_server_state( server, ps_idle_server );
return server;
}
static struct pipe_client *create_pipe_client( unsigned int flags, unsigned int pipe_flags, data_size_t buffer_size )
{
struct pipe_client *client;
client = alloc_object( &pipe_client_ops );
if (!client)
return NULL;
client->server = NULL;
client->flags = flags;
init_pipe_end( &client->pipe_end, pipe_flags, buffer_size );
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 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_client *client;
unsigned int pipe_sharing;
int fds[2];
if (!(server = find_available_server( pipe )))
{
set_error( STATUS_PIPE_NOT_AVAILABLE );
return NULL;
}
pipe_sharing = server->pipe->sharing;
if (((access & GENERIC_READ) && !(pipe_sharing & FILE_SHARE_READ)) ||
((access & GENERIC_WRITE) && !(pipe_sharing & FILE_SHARE_WRITE)))
{
set_error( STATUS_ACCESS_DENIED );
release_object( server );
return NULL;
}
if ((client = create_pipe_client( options, pipe->flags, pipe->outsize )))
{
if (use_server_io( &server->pipe_end ))
{
client->pipe_end.fd = alloc_pseudo_fd( &pipe_client_fd_ops, &client->pipe_end.obj, options );
if (client->pipe_end.fd)
{
set_fd_signaled( client->pipe_end.fd, 1 );
server->pipe_end.fd = (struct fd *)grab_object( server->ioctl_fd );
set_no_fd_status( server->ioctl_fd, STATUS_BAD_DEVICE_TYPE );
}
else
{
release_object( client );
client = NULL;
}
}
else if (!socketpair( PF_UNIX, SOCK_STREAM, 0, fds ))
{
assert( !server->pipe_end.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->pipe_end.fd = create_anonymous_fd( &pipe_client_fd_ops, fds[1], &client->pipe_end.obj, options );
server->pipe_end.fd = create_anonymous_fd( &pipe_server_fd_ops, fds[0], &server->pipe_end.obj, server->options );
if (client->pipe_end.fd && server->pipe_end.fd)
{
fd_copy_completion( server->ioctl_fd, server->pipe_end.fd );
}
else
{
release_object( client );
client = NULL;
}
}
else
{
file_set_error();
release_object( client );
client = NULL;
}
if (client)
{
allow_fd_caching( client->pipe_end.fd );
allow_fd_caching( server->pipe_end.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;
server->pipe_end.connection = &client->pipe_end;
client->pipe_end.connection = &server->pipe_end;
}
}
release_object( server );
return &client->pipe_end.obj;
}
static obj_handle_t 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();
obj_handle_t wait_handle = 0;
struct named_pipe *pipe;
struct pipe_server *server;
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 (!(server = find_available_server( pipe )))
{
if (!pipe->waiters && !(pipe->waiters = create_async_queue( NULL ))) goto done;
queue_async( pipe->waiters, async );
when = buffer->TimeoutSpecified ? buffer->Timeout.QuadPart : pipe->timeout;
async_set_timeout( async, when, STATUS_IO_TIMEOUT );
if (async_is_blocking( async )) wait_handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
set_error( STATUS_PENDING );
}
else release_object( server );
done:
release_object( pipe );
return wait_handle;
}
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;
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 & NAMED_PIPE_MESSAGE_STREAM_WRITE;
pipe->sharing = req->sharing;
}
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 );
server->pipe->instances++;
if (sd) default_set_sd( &server->pipe_end.obj, sd, OWNER_SECURITY_INFORMATION |
GROUP_SECURITY_INFORMATION |
DACL_SECURITY_INFORMATION |
SACL_SECURITY_INFORMATION );
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)
{
if (get_error() != STATUS_OBJECT_TYPE_MISMATCH)
return;
clear_error();
client = (struct pipe_client *)get_handle_obj( current->process, req->handle,
0, &pipe_client_ops );
if (!client) return;
server = client->server;
}
reply->flags = client ? client->pipe_end.flags : server->pipe_end.flags;
if (server)
{
reply->sharing = server->pipe->sharing;
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);
}
}
DECL_HANDLER(set_named_pipe_info)
{
struct pipe_server *server;
struct pipe_client *client = NULL;
server = get_pipe_server_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES );
if (!server)
{
if (get_error() != STATUS_OBJECT_TYPE_MISMATCH)
return;
clear_error();
client = (struct pipe_client *)get_handle_obj( current->process, req->handle,
0, &pipe_client_ops );
if (!client) return;
if (!(server = client->server))
{
release_object( client );
return;
}
}
if ((req->flags & ~(NAMED_PIPE_MESSAGE_STREAM_READ | NAMED_PIPE_NONBLOCKING_MODE)) ||
((req->flags & NAMED_PIPE_MESSAGE_STREAM_READ) && !(server->pipe->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE)))
{
set_error( STATUS_INVALID_PARAMETER );
}
else if (client)
{
client->pipe_end.flags = server->pipe->flags | req->flags;
}
else
{
server->pipe_end.flags = server->pipe->flags | req->flags;
}
if (client)
release_object(client);
else
release_object(server);
}
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