static struct ldb_dn *ldb_dn_rebase_local(void *mem_ctx, const struct ldb_map_context *data, struct ldb_dn *dn)
{
	struct ldb_dn *new_dn;

	new_dn = ldb_dn_copy(mem_ctx, dn);
	if ( ! ldb_dn_validate(new_dn)) {
		talloc_free(new_dn);
		return NULL;
	}

	/* may be we don't need to rebase at all */
	if ( ! data->remote_base_dn || ! data->local_base_dn) {
		return new_dn;
	}

	if ( ! ldb_dn_remove_base_components(new_dn, ldb_dn_get_comp_num(data->remote_base_dn))) {
		talloc_free(new_dn);
		return NULL;
	}

	if ( ! ldb_dn_add_base(new_dn, data->local_base_dn)) {
		talloc_free(new_dn);
		return NULL;
	}

	return new_dn;
}
static struct ldb_dn *ldb_dn_rebase_local(void *mem_ctx, const struct ldb_map_context *data, struct ldb_dn *dn)
{
	struct ldb_dn *new_dn;

	new_dn = ldb_dn_copy(mem_ctx, dn);
	if ( ! ldb_dn_validate(new_dn)) {
		talloc_free(new_dn);
		return NULL;
	}

	 
	if ( ! data->remote_base_dn || ! data->local_base_dn) {
		return new_dn;
	}

	if ( ! ldb_dn_remove_base_components(new_dn, ldb_dn_get_comp_num(data->remote_base_dn))) {
		talloc_free(new_dn);
		return NULL;
	}

	if ( ! ldb_dn_add_base(new_dn, data->local_base_dn)) {
		talloc_free(new_dn);
		return NULL;
	}

	return new_dn;
}