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/*
ldb database mapping module
Copyright (C) Jelmer Vernooij 2005
Copyright (C) Martin Kuehl <mkhl@samba.org> 2006
** NOTE! The following LGPL license applies to the ldb
** library. This does NOT imply that all of Samba is released
** under the LGPL
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef __LDB_MAP_H__
#define __LDB_MAP_H__
#include "ldb_module.h"
/* ldb_map is a skeleton LDB module that can be used for any other modules
* that need to map attributes.
*
* The term 'remote' in this header refers to the connection where the
* original schema is used on while 'local' means the local connection
* that any upper layers will use.
*
* All local attributes will have to have a definition. Not all remote
* attributes need a definition as LDB is a lot less strict than LDAP
* (in other words, sending unknown attributes to an LDAP server hurts us,
* while returning too many attributes in ldb_search() doesn't)
*/
/* Name of the internal attribute pointing from the local to the
* remote part of a record */
#define IS_MAPPED "isMapped"
struct ldb_map_context;
/* convert a local ldb_val to a remote ldb_val */
typedef struct ldb_val (*ldb_map_convert_func) (struct ldb_module *module, void *mem_ctx, const struct ldb_val *val);
#define LDB_MAP_MAX_REMOTE_NAMES 10
/* map from local to remote attribute */
struct ldb_map_attribute {
const char *local_name; /* local name */
enum ldb_map_attr_type {
LDB_MAP_IGNORE, /* Ignore this local attribute. Doesn't exist remotely. */
LDB_MAP_KEEP, /* Keep as is. Same name locally and remotely. */
LDB_MAP_RENAME, /* Simply rename the attribute. Name changes, data is the same */
LDB_MAP_CONVERT, /* Rename + convert data */
LDB_MAP_GENERATE, /* Use generate function for generating new name/data.
Used for generating attributes based on
multiple remote attributes. */
LDB_MAP_RENDROP /* Rename the attribute. Strip from Add requests. */
} type;
/* if set, will be called for search expressions that contain this attribute */
int (*convert_operator)(struct ldb_module *, TALLOC_CTX *ctx, struct ldb_parse_tree **ntree, const struct ldb_parse_tree *otree);
union {
struct {
const char *remote_name;
} rename;
struct {
const char *remote_name;
/* Convert local to remote data */
ldb_map_convert_func convert_local;
/* Convert remote to local data */
/* an entry can have convert_remote set to NULL, as long as there as an entry with the same local_name
* that is non-NULL before it. */
ldb_map_convert_func convert_remote;
} convert;
struct {
/* Generate the local attribute from remote message */
struct ldb_message_element *(*generate_local)(struct ldb_module *, TALLOC_CTX *mem_ctx, const char *remote_attr, const struct ldb_message *remote);
/* Update remote message with information from local message */
void (*generate_remote)(struct ldb_module *, const char *local_attr, const struct ldb_message *old, struct ldb_message *remote, struct ldb_message *local);
/* Name(s) for this attribute on the remote server. This is an array since
* one local attribute's data can be split up into several attributes
* remotely */
const char *remote_names[LDB_MAP_MAX_REMOTE_NAMES];
/* Names of additional remote attributes
* required for the generation. NULL
* indicates that `local_attr' suffices. */
/*
#define LDB_MAP_MAX_SELF_ATTRIBUTES 10
const char *self_attrs[LDB_MAP_MAX_SELF_ATTRIBUTES];
*/
} generate;
} u;
};
#define LDB_MAP_MAX_SUBCLASSES 10
#define LDB_MAP_MAX_MUSTS 10
#define LDB_MAP_MAX_MAYS 50
/* map from local to remote objectClass */
struct ldb_map_objectclass {
const char *local_name;
const char *remote_name;
const char *base_classes[LDB_MAP_MAX_SUBCLASSES];
const char *musts[LDB_MAP_MAX_MUSTS];
const char *mays[LDB_MAP_MAX_MAYS];
};
/* private context data */
struct ldb_map_context {
struct ldb_map_attribute *attribute_maps;
/* NOTE: Always declare base classes first here */
const struct ldb_map_objectclass *objectclass_maps;
/* Remote (often operational) attributes that should be added
* to any wildcard search */
const char * const *wildcard_attributes;
/* ObjectClass (if any) to be added to remote attributes on add */
const char *add_objectclass;
/* struct ldb_context *mapped_ldb; */
struct ldb_dn *local_base_dn;
struct ldb_dn *remote_base_dn;
};
/* Global private data */
struct map_private {
void *caller_private;
struct ldb_map_context *context;
};
/* Initialize global private data. */
int ldb_map_init(struct ldb_module *module, const struct ldb_map_attribute *attrs,
const struct ldb_map_objectclass *ocls,
const char * const *wildcard_attributes,
const char *add_objectclass,
const char *name);
int ldb_map_add(struct ldb_module *module, struct ldb_request *req);
int ldb_map_search(struct ldb_module *module, struct ldb_request *req);
int ldb_map_rename(struct ldb_module *module, struct ldb_request *req);
int ldb_map_delete(struct ldb_module *module, struct ldb_request *req);
int ldb_map_modify(struct ldb_module *module, struct ldb_request *req);
#define LDB_MAP_OPS \
.add = ldb_map_add, \
.modify = ldb_map_modify, \
.del = ldb_map_delete, \
.rename = ldb_map_rename, \
.search = ldb_map_search,
#endif /* __LDB_MAP_H__ */
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