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ldb database mapping module
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Copyright (C) Jelmer Vernooij 2005
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Copyright (C) Martin Kuehl <mkhl@samba.org> 2006
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** NOTE! The following LGPL license applies to the ldb
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** library. This does NOT imply that all of Samba is released
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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#include "ldb_module.h"
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/* ldb_map is a skeleton LDB module that can be used for any other modules
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* that need to map attributes.
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* The term 'remote' in this header refers to the connection where the
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* original schema is used on while 'local' means the local connection
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* that any upper layers will use.
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* All local attributes will have to have a definition. Not all remote
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* attributes need a definition as LDB is a lot less strict than LDAP
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* (in other words, sending unknown attributes to an LDAP server hurts us,
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* while returning too many attributes in ldb_search() doesn't)
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/* Name of the internal attribute pointing from the local to the
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* remote part of a record */
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#define IS_MAPPED "isMapped"
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struct ldb_map_context;
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/* convert a local ldb_val to a remote ldb_val */
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typedef struct ldb_val (*ldb_map_convert_func) (struct ldb_module *module, void *mem_ctx, const struct ldb_val *val);
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#define LDB_MAP_MAX_REMOTE_NAMES 10
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/* map from local to remote attribute */
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struct ldb_map_attribute {
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const char *local_name; /* local name */
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enum ldb_map_attr_type {
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MAP_IGNORE, /* Ignore this local attribute. Doesn't exist remotely. */
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MAP_KEEP, /* Keep as is. Same name locally and remotely. */
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MAP_RENAME, /* Simply rename the attribute. Name changes, data is the same */
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MAP_CONVERT, /* Rename + convert data */
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MAP_GENERATE /* Use generate function for generating new name/data.
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Used for generating attributes based on
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multiple remote attributes. */
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/* if set, will be called for search expressions that contain this attribute */
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int (*convert_operator)(struct ldb_module *, TALLOC_CTX *ctx, struct ldb_parse_tree **ntree, const struct ldb_parse_tree *otree);
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const char *remote_name;
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const char *remote_name;
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/* Convert local to remote data */
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ldb_map_convert_func convert_local;
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/* Convert remote to local data */
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/* an entry can have convert_remote set to NULL, as long as there as an entry with the same local_name
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* that is non-NULL before it. */
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ldb_map_convert_func convert_remote;
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/* Generate the local attribute from remote message */
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struct ldb_message_element *(*generate_local)(struct ldb_module *, TALLOC_CTX *mem_ctx, const char *remote_attr, const struct ldb_message *remote);
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/* Update remote message with information from local message */
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void (*generate_remote)(struct ldb_module *, const char *local_attr, const struct ldb_message *old, struct ldb_message *remote, struct ldb_message *local);
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/* Name(s) for this attribute on the remote server. This is an array since
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* one local attribute's data can be split up into several attributes
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const char *remote_names[LDB_MAP_MAX_REMOTE_NAMES];
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/* Names of additional remote attributes
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* required for the generation. NULL
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* indicates that `local_attr' suffices. */
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#define LDB_MAP_MAX_SELF_ATTRIBUTES 10
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const char *self_attrs[LDB_MAP_MAX_SELF_ATTRIBUTES];
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#define LDB_MAP_MAX_SUBCLASSES 10
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#define LDB_MAP_MAX_MUSTS 10
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#define LDB_MAP_MAX_MAYS 50
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/* map from local to remote objectClass */
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struct ldb_map_objectclass {
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const char *local_name;
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const char *remote_name;
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const char *base_classes[LDB_MAP_MAX_SUBCLASSES];
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const char *musts[LDB_MAP_MAX_MUSTS];
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const char *mays[LDB_MAP_MAX_MAYS];
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/* private context data */
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struct ldb_map_context {
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struct ldb_map_attribute *attribute_maps;
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/* NOTE: Always declare base classes first here */
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const struct ldb_map_objectclass *objectclass_maps;
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/* Remote (often operational) attributes that should be added
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* to any wildcard search */
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const char * const *wildcard_attributes;
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/* ObjectClass (if any) to be added to remote attributes on add */
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const char *add_objectclass;
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/* struct ldb_context *mapped_ldb; */
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struct ldb_dn *local_base_dn;
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struct ldb_dn *remote_base_dn;
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/* Global private data */
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void *caller_private;
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struct ldb_map_context *context;
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/* Initialize global private data. */
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int ldb_map_init(struct ldb_module *module, const struct ldb_map_attribute *attrs,
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const struct ldb_map_objectclass *ocls,
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const char * const *wildcard_attributes,
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const char *add_objectclass,
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int map_add(struct ldb_module *module, struct ldb_request *req);
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int map_search(struct ldb_module *module, struct ldb_request *req);
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int map_rename(struct ldb_module *module, struct ldb_request *req);
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int map_delete(struct ldb_module *module, struct ldb_request *req);
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int map_modify(struct ldb_module *module, struct ldb_request *req);
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#define LDB_MAP_OPS \
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.modify = map_modify, \
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.rename = map_rename, \
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.search = map_search,
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#endif /* __LDB_MAP_H__ */