553 lines
15 KiB
C
553 lines
15 KiB
C
/*
|
|
* Server-side objects
|
|
*
|
|
* Copyright (C) 1998 Alexandre Julliard
|
|
*
|
|
* 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 <limits.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <stdarg.h>
|
|
|
|
#include "ntstatus.h"
|
|
#define WIN32_NO_STATUS
|
|
#include "winternl.h"
|
|
|
|
#include "file.h"
|
|
#include "process.h"
|
|
#include "thread.h"
|
|
#include "unicode.h"
|
|
#include "security.h"
|
|
|
|
|
|
struct object_name
|
|
{
|
|
struct list entry; /* entry in the hash list */
|
|
struct object *obj; /* object owning this name */
|
|
struct object *parent; /* parent object */
|
|
data_size_t len; /* name length in bytes */
|
|
WCHAR name[1];
|
|
};
|
|
|
|
struct namespace
|
|
{
|
|
unsigned int hash_size; /* size of hash table */
|
|
struct list names[1]; /* array of hash entry lists */
|
|
};
|
|
|
|
|
|
#ifdef DEBUG_OBJECTS
|
|
static struct list object_list = LIST_INIT(object_list);
|
|
static struct list static_object_list = LIST_INIT(static_object_list);
|
|
|
|
void dump_objects(void)
|
|
{
|
|
struct list *p;
|
|
|
|
LIST_FOR_EACH( p, &static_object_list )
|
|
{
|
|
struct object *ptr = LIST_ENTRY( p, struct object, obj_list );
|
|
fprintf( stderr, "%p:%d: ", ptr, ptr->refcount );
|
|
ptr->ops->dump( ptr, 1 );
|
|
}
|
|
LIST_FOR_EACH( p, &object_list )
|
|
{
|
|
struct object *ptr = LIST_ENTRY( p, struct object, obj_list );
|
|
fprintf( stderr, "%p:%d: ", ptr, ptr->refcount );
|
|
ptr->ops->dump( ptr, 1 );
|
|
}
|
|
}
|
|
|
|
void close_objects(void)
|
|
{
|
|
struct list *ptr;
|
|
|
|
/* release the static objects */
|
|
while ((ptr = list_head( &static_object_list )))
|
|
{
|
|
struct object *obj = LIST_ENTRY( ptr, struct object, obj_list );
|
|
/* move it back to the standard list before freeing */
|
|
list_remove( &obj->obj_list );
|
|
list_add_head( &object_list, &obj->obj_list );
|
|
release_object( obj );
|
|
}
|
|
|
|
dump_objects(); /* dump any remaining objects */
|
|
}
|
|
|
|
#endif /* DEBUG_OBJECTS */
|
|
|
|
/*****************************************************************/
|
|
|
|
/* malloc replacement */
|
|
void *mem_alloc( size_t size )
|
|
{
|
|
void *ptr = malloc( size );
|
|
if (ptr) memset( ptr, 0x55, size );
|
|
else set_error( STATUS_NO_MEMORY );
|
|
return ptr;
|
|
}
|
|
|
|
/* duplicate a block of memory */
|
|
void *memdup( const void *data, size_t len )
|
|
{
|
|
void *ptr = malloc( len );
|
|
if (ptr) memcpy( ptr, data, len );
|
|
else set_error( STATUS_NO_MEMORY );
|
|
return ptr;
|
|
}
|
|
|
|
|
|
/*****************************************************************/
|
|
|
|
static int get_name_hash( const struct namespace *namespace, const WCHAR *name, data_size_t len )
|
|
{
|
|
WCHAR hash = 0;
|
|
len /= sizeof(WCHAR);
|
|
while (len--) hash ^= tolowerW(*name++);
|
|
return hash % namespace->hash_size;
|
|
}
|
|
|
|
/* allocate a name for an object */
|
|
static struct object_name *alloc_name( const struct unicode_str *name )
|
|
{
|
|
struct object_name *ptr;
|
|
|
|
if ((ptr = mem_alloc( sizeof(*ptr) + name->len - sizeof(ptr->name) )))
|
|
{
|
|
ptr->len = name->len;
|
|
ptr->parent = NULL;
|
|
memcpy( ptr->name, name->str, name->len );
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
/* free the name of an object */
|
|
static void free_name( struct object *obj )
|
|
{
|
|
struct object_name *ptr = obj->name;
|
|
list_remove( &ptr->entry );
|
|
if (ptr->parent) release_object( ptr->parent );
|
|
free( ptr );
|
|
}
|
|
|
|
/* set the name of an existing object */
|
|
static void set_object_name( struct namespace *namespace,
|
|
struct object *obj, struct object_name *ptr )
|
|
{
|
|
int hash = get_name_hash( namespace, ptr->name, ptr->len );
|
|
|
|
list_add_head( &namespace->names[hash], &ptr->entry );
|
|
ptr->obj = obj;
|
|
obj->name = ptr;
|
|
}
|
|
|
|
/* get the name of an existing object */
|
|
const WCHAR *get_object_name( struct object *obj, data_size_t *len )
|
|
{
|
|
struct object_name *ptr = obj->name;
|
|
if (!ptr) return NULL;
|
|
*len = ptr->len;
|
|
return ptr->name;
|
|
}
|
|
|
|
/* get the full path name of an existing object */
|
|
WCHAR *get_object_full_name( struct object *obj, data_size_t *ret_len )
|
|
{
|
|
static const WCHAR backslash = '\\';
|
|
struct object *ptr = obj;
|
|
data_size_t len = 0;
|
|
char *ret;
|
|
|
|
while (ptr && ptr->name)
|
|
{
|
|
struct object_name *name = ptr->name;
|
|
len += name->len + sizeof(WCHAR);
|
|
ptr = name->parent;
|
|
}
|
|
if (!len) return NULL;
|
|
if (!(ret = malloc( len ))) return NULL;
|
|
|
|
*ret_len = len;
|
|
while (obj && obj->name)
|
|
{
|
|
struct object_name *name = obj->name;
|
|
memcpy( ret + len - name->len, name->name, name->len );
|
|
len -= name->len + sizeof(WCHAR);
|
|
memcpy( ret + len, &backslash, sizeof(WCHAR) );
|
|
obj = name->parent;
|
|
}
|
|
return (WCHAR *)ret;
|
|
}
|
|
|
|
/* allocate and initialize an object */
|
|
void *alloc_object( const struct object_ops *ops )
|
|
{
|
|
struct object *obj = mem_alloc( ops->size );
|
|
if (obj)
|
|
{
|
|
obj->refcount = 1;
|
|
obj->ops = ops;
|
|
obj->name = NULL;
|
|
obj->sd = NULL;
|
|
list_init( &obj->wait_queue );
|
|
#ifdef DEBUG_OBJECTS
|
|
list_add_head( &object_list, &obj->obj_list );
|
|
#endif
|
|
return obj;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void *create_object( struct namespace *namespace, const struct object_ops *ops,
|
|
const struct unicode_str *name, struct object *parent )
|
|
{
|
|
struct object *obj;
|
|
struct object_name *name_ptr;
|
|
|
|
if (!(name_ptr = alloc_name( name ))) return NULL;
|
|
if ((obj = alloc_object( ops )))
|
|
{
|
|
set_object_name( namespace, obj, name_ptr );
|
|
if (parent) name_ptr->parent = grab_object( parent );
|
|
}
|
|
else
|
|
free( name_ptr );
|
|
return obj;
|
|
}
|
|
|
|
void *create_named_object( struct namespace *namespace, const struct object_ops *ops,
|
|
const struct unicode_str *name, unsigned int attributes )
|
|
{
|
|
struct object *obj;
|
|
|
|
if (!name || !name->len) return alloc_object( ops );
|
|
|
|
if ((obj = find_object( namespace, name, attributes )))
|
|
{
|
|
if (attributes & OBJ_OPENIF && obj->ops == ops)
|
|
set_error( STATUS_OBJECT_NAME_EXISTS );
|
|
else
|
|
{
|
|
release_object( obj );
|
|
obj = NULL;
|
|
if (attributes & OBJ_OPENIF)
|
|
set_error( STATUS_OBJECT_TYPE_MISMATCH );
|
|
else
|
|
set_error( STATUS_OBJECT_NAME_COLLISION );
|
|
}
|
|
return obj;
|
|
}
|
|
if ((obj = create_object( namespace, ops, name, NULL ))) clear_error();
|
|
return obj;
|
|
}
|
|
|
|
/* dump the name of an object to stderr */
|
|
void dump_object_name( struct object *obj )
|
|
{
|
|
if (!obj->name) fprintf( stderr, "name=\"\"" );
|
|
else
|
|
{
|
|
fprintf( stderr, "name=L\"" );
|
|
dump_strW( obj->name->name, obj->name->len/sizeof(WCHAR), stderr, "\"\"" );
|
|
fputc( '\"', stderr );
|
|
}
|
|
}
|
|
|
|
/* unlink a named object from its namespace, without freeing the object itself */
|
|
void unlink_named_object( struct object *obj )
|
|
{
|
|
if (obj->name) free_name( obj );
|
|
obj->name = NULL;
|
|
}
|
|
|
|
/* mark an object as being stored statically, i.e. only released at shutdown */
|
|
void make_object_static( struct object *obj )
|
|
{
|
|
#ifdef DEBUG_OBJECTS
|
|
list_remove( &obj->obj_list );
|
|
list_add_head( &static_object_list, &obj->obj_list );
|
|
#endif
|
|
}
|
|
|
|
/* grab an object (i.e. increment its refcount) and return the object */
|
|
struct object *grab_object( void *ptr )
|
|
{
|
|
struct object *obj = (struct object *)ptr;
|
|
assert( obj->refcount < INT_MAX );
|
|
obj->refcount++;
|
|
return obj;
|
|
}
|
|
|
|
/* release an object (i.e. decrement its refcount) */
|
|
void release_object( void *ptr )
|
|
{
|
|
struct object *obj = (struct object *)ptr;
|
|
assert( obj->refcount );
|
|
if (!--obj->refcount)
|
|
{
|
|
/* if the refcount is 0, nobody can be in the wait queue */
|
|
assert( list_empty( &obj->wait_queue ));
|
|
obj->ops->destroy( obj );
|
|
if (obj->name) free_name( obj );
|
|
free( obj->sd );
|
|
#ifdef DEBUG_OBJECTS
|
|
list_remove( &obj->obj_list );
|
|
memset( obj, 0xaa, obj->ops->size );
|
|
#endif
|
|
free( obj );
|
|
}
|
|
}
|
|
|
|
/* find an object by its name; the refcount is incremented */
|
|
struct object *find_object( const struct namespace *namespace, const struct unicode_str *name,
|
|
unsigned int attributes )
|
|
{
|
|
const struct list *list;
|
|
struct list *p;
|
|
|
|
if (!name || !name->len) return NULL;
|
|
|
|
list = &namespace->names[ get_name_hash( namespace, name->str, name->len ) ];
|
|
LIST_FOR_EACH( p, list )
|
|
{
|
|
const struct object_name *ptr = LIST_ENTRY( p, struct object_name, entry );
|
|
if (ptr->len != name->len) continue;
|
|
if (attributes & OBJ_CASE_INSENSITIVE)
|
|
{
|
|
if (!strncmpiW( ptr->name, name->str, name->len/sizeof(WCHAR) ))
|
|
return grab_object( ptr->obj );
|
|
}
|
|
else
|
|
{
|
|
if (!memcmp( ptr->name, name->str, name->len ))
|
|
return grab_object( ptr->obj );
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* find an object by its index; the refcount is incremented */
|
|
struct object *find_object_index( const struct namespace *namespace, unsigned int index )
|
|
{
|
|
unsigned int i;
|
|
|
|
/* FIXME: not efficient at all */
|
|
for (i = 0; i < namespace->hash_size; i++)
|
|
{
|
|
const struct object_name *ptr;
|
|
LIST_FOR_EACH_ENTRY( ptr, &namespace->names[i], const struct object_name, entry )
|
|
{
|
|
if (!index--) return grab_object( ptr->obj );
|
|
}
|
|
}
|
|
set_error( STATUS_NO_MORE_ENTRIES );
|
|
return NULL;
|
|
}
|
|
|
|
/* allocate a namespace */
|
|
struct namespace *create_namespace( unsigned int hash_size )
|
|
{
|
|
struct namespace *namespace;
|
|
unsigned int i;
|
|
|
|
namespace = mem_alloc( sizeof(*namespace) + (hash_size - 1) * sizeof(namespace->names[0]) );
|
|
if (namespace)
|
|
{
|
|
namespace->hash_size = hash_size;
|
|
for (i = 0; i < hash_size; i++) list_init( &namespace->names[i] );
|
|
}
|
|
return namespace;
|
|
}
|
|
|
|
/* functions for unimplemented/default object operations */
|
|
|
|
struct object_type *no_get_type( struct object *obj )
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
int no_add_queue( struct object *obj, struct wait_queue_entry *entry )
|
|
{
|
|
set_error( STATUS_OBJECT_TYPE_MISMATCH );
|
|
return 0;
|
|
}
|
|
|
|
void no_satisfied( struct object *obj, struct wait_queue_entry *entry )
|
|
{
|
|
}
|
|
|
|
int no_signal( struct object *obj, unsigned int access )
|
|
{
|
|
set_error( STATUS_OBJECT_TYPE_MISMATCH );
|
|
return 0;
|
|
}
|
|
|
|
struct fd *no_get_fd( struct object *obj )
|
|
{
|
|
set_error( STATUS_OBJECT_TYPE_MISMATCH );
|
|
return NULL;
|
|
}
|
|
|
|
unsigned int no_map_access( struct object *obj, unsigned int access )
|
|
{
|
|
if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ;
|
|
if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE;
|
|
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);
|
|
}
|
|
|
|
struct security_descriptor *default_get_sd( struct object *obj )
|
|
{
|
|
return obj->sd;
|
|
}
|
|
|
|
int set_sd_defaults_from_token( struct object *obj, const struct security_descriptor *sd,
|
|
unsigned int set_info, struct token *token )
|
|
{
|
|
struct security_descriptor new_sd, *new_sd_ptr;
|
|
int present;
|
|
const SID *owner = NULL, *group = NULL;
|
|
const ACL *sacl, *dacl;
|
|
char *ptr;
|
|
|
|
if (!set_info) return 1;
|
|
|
|
new_sd.control = sd->control & ~SE_SELF_RELATIVE;
|
|
|
|
if (set_info & OWNER_SECURITY_INFORMATION && sd->owner_len)
|
|
{
|
|
owner = sd_get_owner( sd );
|
|
new_sd.owner_len = sd->owner_len;
|
|
}
|
|
else if (obj->sd && obj->sd->owner_len)
|
|
{
|
|
owner = sd_get_owner( obj->sd );
|
|
new_sd.owner_len = obj->sd->owner_len;
|
|
}
|
|
else if (token)
|
|
{
|
|
owner = token_get_user( token );
|
|
new_sd.owner_len = security_sid_len( owner );
|
|
}
|
|
else new_sd.owner_len = 0;
|
|
|
|
if (set_info & GROUP_SECURITY_INFORMATION && sd->group_len)
|
|
{
|
|
group = sd_get_group( sd );
|
|
new_sd.group_len = sd->group_len;
|
|
}
|
|
else if (obj->sd && obj->sd->group_len)
|
|
{
|
|
group = sd_get_group( obj->sd );
|
|
new_sd.group_len = obj->sd->group_len;
|
|
}
|
|
else if (token)
|
|
{
|
|
group = token_get_primary_group( token );
|
|
new_sd.group_len = security_sid_len( group );
|
|
}
|
|
else new_sd.group_len = 0;
|
|
|
|
new_sd.control |= SE_SACL_PRESENT;
|
|
sacl = sd_get_sacl( sd, &present );
|
|
if (set_info & SACL_SECURITY_INFORMATION && present)
|
|
new_sd.sacl_len = sd->sacl_len;
|
|
else
|
|
{
|
|
if (obj->sd) sacl = sd_get_sacl( obj->sd, &present );
|
|
|
|
if (obj->sd && present)
|
|
new_sd.sacl_len = obj->sd->sacl_len;
|
|
else
|
|
new_sd.sacl_len = 0;
|
|
}
|
|
|
|
new_sd.control |= SE_DACL_PRESENT;
|
|
dacl = sd_get_dacl( sd, &present );
|
|
if (set_info & DACL_SECURITY_INFORMATION && present)
|
|
new_sd.dacl_len = sd->dacl_len;
|
|
else
|
|
{
|
|
if (obj->sd) dacl = sd_get_dacl( obj->sd, &present );
|
|
|
|
if (obj->sd && present)
|
|
new_sd.dacl_len = obj->sd->dacl_len;
|
|
else if (token)
|
|
{
|
|
dacl = token_get_default_dacl( token );
|
|
new_sd.dacl_len = dacl->AclSize;
|
|
}
|
|
else new_sd.dacl_len = 0;
|
|
}
|
|
|
|
ptr = mem_alloc( sizeof(new_sd) + new_sd.owner_len + new_sd.group_len +
|
|
new_sd.sacl_len + new_sd.dacl_len );
|
|
if (!ptr) return 0;
|
|
new_sd_ptr = (struct security_descriptor*)ptr;
|
|
|
|
memcpy( ptr, &new_sd, sizeof(new_sd) );
|
|
ptr += sizeof(new_sd);
|
|
memcpy( ptr, owner, new_sd.owner_len );
|
|
ptr += new_sd.owner_len;
|
|
memcpy( ptr, group, new_sd.group_len );
|
|
ptr += new_sd.group_len;
|
|
memcpy( ptr, sacl, new_sd.sacl_len );
|
|
ptr += new_sd.sacl_len;
|
|
memcpy( ptr, dacl, new_sd.dacl_len );
|
|
|
|
free( obj->sd );
|
|
obj->sd = new_sd_ptr;
|
|
return 1;
|
|
}
|
|
|
|
/** Set the security descriptor using the current primary token for defaults. */
|
|
int default_set_sd( struct object *obj, const struct security_descriptor *sd,
|
|
unsigned int set_info )
|
|
{
|
|
return set_sd_defaults_from_token( obj, sd, set_info, current->process->token );
|
|
}
|
|
|
|
struct object *no_lookup_name( struct object *obj, struct unicode_str *name,
|
|
unsigned int attr )
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
struct object *no_open_file( struct object *obj, unsigned int access, unsigned int sharing,
|
|
unsigned int options )
|
|
{
|
|
set_error( STATUS_OBJECT_TYPE_MISMATCH );
|
|
return NULL;
|
|
}
|
|
|
|
int no_close_handle( struct object *obj, struct process *process, obj_handle_t handle )
|
|
{
|
|
return 1; /* ok to close */
|
|
}
|
|
|
|
void no_destroy( struct object *obj )
|
|
{
|
|
}
|