diff options
Diffstat (limited to 'source4/lib/ldb/modules')
-rw-r--r-- | source4/lib/ldb/modules/objectclass.c | 692 |
1 files changed, 0 insertions, 692 deletions
diff --git a/source4/lib/ldb/modules/objectclass.c b/source4/lib/ldb/modules/objectclass.c deleted file mode 100644 index 51e95076bd..0000000000 --- a/source4/lib/ldb/modules/objectclass.c +++ /dev/null @@ -1,692 +0,0 @@ -/* - ldb database library - - Copyright (C) Simo Sorce 2006 - Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2006 - - ** 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/>. -*/ - -/* - * Name: ldb - * - * Component: objectClass sorting module - * - * Description: sort the objectClass attribute into the class hierarchy - * - * Author: Andrew Bartlett - */ - -#include "ldb_includes.h" - -struct oc_context { - - enum oc_step {OC_DO_REQ, OC_SEARCH_SELF, OC_DO_MOD} step; - - struct ldb_module *module; - struct ldb_request *orig_req; - - struct ldb_request *down_req; - - struct ldb_request *search_req; - struct ldb_reply *search_res; - - struct ldb_request *mod_req; -}; - -struct class_list { - struct class_list *prev, *next; - const char *objectclass; -}; - -static struct ldb_handle *oc_init_handle(struct ldb_request *req, struct ldb_module *module) -{ - struct oc_context *ac; - struct ldb_handle *h; - - h = talloc_zero(req, struct ldb_handle); - if (h == NULL) { - ldb_set_errstring(module->ldb, "Out of Memory"); - return NULL; - } - - h->module = module; - - ac = talloc_zero(h, struct oc_context); - if (ac == NULL) { - ldb_set_errstring(module->ldb, "Out of Memory"); - talloc_free(h); - return NULL; - } - - h->private_data = (void *)ac; - - h->state = LDB_ASYNC_INIT; - h->status = LDB_SUCCESS; - - ac->module = module; - ac->orig_req = req; - - return h; -} - -static int objectclass_sort(struct ldb_module *module, - TALLOC_CTX *mem_ctx, - struct ldb_message_element *objectclass_element, - struct class_list **sorted_out) -{ - int i; - int layer; - struct class_list *sorted = NULL, *parent_class = NULL, - *subclass = NULL, *unsorted = NULL, *current, *poss_subclass; - /* DESIGN: - * - * We work on 4 different 'bins' (implemented here as linked lists): - * - * * sorted: the eventual list, in the order we wish to push - * into the database. This is the only ordered list. - * - * * parent_class: The current parent class 'bin' we are - * trying to find subclasses for - * - * * subclass: The subclasses we have found so far - * - * * unsorted: The remaining objectClasses - * - * The process is a matter of filtering objectClasses up from - * unsorted into sorted. Order is irrelevent in the later 3 'bins'. - * - * We start with 'top' (found and promoted to parent_class - * initially). Then we find (in unsorted) all the direct - * subclasses of 'top'. parent_classes is concatenated onto - * the end of 'sorted', and subclass becomes the list in - * parent_class. - * - * We then repeat, until we find no more subclasses. Any left - * over classes are added to the end. - * - */ - - /* Firstly, dump all the objectClass elements into the - * unsorted bin, except for 'top', which is special */ - for (i=0; i < objectclass_element->num_values; i++) { - current = talloc(mem_ctx, struct class_list); - if (!current) { - ldb_set_errstring(module->ldb, "objectclass: out of memory allocating objectclass list"); - talloc_free(mem_ctx); - return LDB_ERR_OPERATIONS_ERROR; - } - current->objectclass = (const char *)objectclass_element->values[i].data; - - /* this is the root of the tree. We will start - * looking for subclasses from here */ - if (ldb_attr_cmp("top", current->objectclass) == 0) { - DLIST_ADD_END(parent_class, current, struct class_list *); - } else { - DLIST_ADD_END(unsorted, current, struct class_list *); - } - } - - /* DEBUGGING aid: how many layers are we down now? */ - layer = 0; - do { - layer++; - /* Find all the subclasses of classes in the - * parent_classes. Push them onto the subclass list */ - - /* Ensure we don't bother if there are no unsorted entries left */ - for (current = parent_class; unsorted && current; current = current->next) { - const char **subclasses = ldb_subclass_list(module->ldb, current->objectclass); - - /* Walk the list of possible subclasses in unsorted */ - for (poss_subclass = unsorted; poss_subclass; ) { - struct class_list *next; - - /* Save the next pointer, as the DLIST_ macros will change poss_subclass->next */ - next = poss_subclass->next; - - for (i = 0; subclasses && subclasses[i]; i++) { - if (ldb_attr_cmp(poss_subclass->objectclass, subclasses[i]) == 0) { - DLIST_REMOVE(unsorted, poss_subclass); - DLIST_ADD(subclass, poss_subclass); - - break; - } - } - poss_subclass = next; - } - } - - /* Now push the parent_classes as sorted, we are done with - these. Add to the END of the list by concatenation */ - DLIST_CONCATENATE(sorted, parent_class, struct class_list *); - - /* and now find subclasses of these */ - parent_class = subclass; - subclass = NULL; - - /* If we didn't find any subclasses we will fall out - * the bottom here */ - } while (parent_class); - - /* This shouldn't happen, and would break MMC, but we can't - * afford to loose objectClasses. Perhaps there was no 'top', - * or some other schema error? - * - * Detecting schema errors is the job of the schema module, so - * at this layer we just try not to loose data - */ - DLIST_CONCATENATE(sorted, unsorted, struct class_list *); - - *sorted_out = sorted; - return LDB_SUCCESS; -} - -static int objectclass_add(struct ldb_module *module, struct ldb_request *req) -{ - struct ldb_message_element *objectclass_element; - struct class_list *sorted, *current; - struct ldb_request *down_req; - struct ldb_message *msg; - int ret; - TALLOC_CTX *mem_ctx; - - ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectclass_add\n"); - - if (ldb_dn_is_special(req->op.add.message->dn)) { /* do not manipulate our control entries */ - return ldb_next_request(module, req); - } - - objectclass_element = ldb_msg_find_element(req->op.add.message, "objectClass"); - - /* If no part of this add has an objectClass, then we don't - * need to make any changes. cn=rootdse doesn't have an objectClass */ - if (!objectclass_element) { - return ldb_next_request(module, req); - } - - mem_ctx = talloc_new(req); - if (mem_ctx == NULL) { - return LDB_ERR_OPERATIONS_ERROR; - } - - ret = objectclass_sort(module, mem_ctx, objectclass_element, &sorted); - if (ret != LDB_SUCCESS) { - return ret; - } - - /* prepare the first operation */ - down_req = talloc(req, struct ldb_request); - if (down_req == NULL) { - ldb_set_errstring(module->ldb, "Out of memory!"); - talloc_free(mem_ctx); - return LDB_ERR_OPERATIONS_ERROR; - } - - *down_req = *req; /* copy the request */ - - down_req->op.add.message = msg = ldb_msg_copy_shallow(down_req, req->op.add.message); - - if (down_req->op.add.message == NULL) { - talloc_free(mem_ctx); - return LDB_ERR_OPERATIONS_ERROR; - } - - ldb_msg_remove_attr(msg, "objectClass"); - ret = ldb_msg_add_empty(msg, "objectClass", 0, NULL); - - if (ret != LDB_SUCCESS) { - talloc_free(mem_ctx); - return ret; - } - - /* We must completely replace the existing objectClass entry, - * because we need it sorted */ - - /* Move from the linked list back into an ldb msg */ - for (current = sorted; current; current = current->next) { - ret = ldb_msg_add_string(msg, "objectClass", current->objectclass); - if (ret != LDB_SUCCESS) { - ldb_set_errstring(module->ldb, "objectclass: could not re-add sorted objectclass to modify msg"); - talloc_free(mem_ctx); - return ret; - } - } - - talloc_free(mem_ctx); - ret = ldb_msg_sanity_check(module->ldb, msg); - - if (ret != LDB_SUCCESS) { - return ret; - } - - /* go on with the call chain */ - ret = ldb_next_request(module, down_req); - - /* do not free down_req as the call results may be linked to it, - * it will be freed when the upper level request get freed */ - if (ret == LDB_SUCCESS) { - req->handle = down_req->handle; - } - return ret; -} - -static int objectclass_modify(struct ldb_module *module, struct ldb_request *req) -{ - struct ldb_message_element *objectclass_element; - struct ldb_message *msg; - ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectclass_modify\n"); - - if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */ - return ldb_next_request(module, req); - } - - objectclass_element = ldb_msg_find_element(req->op.mod.message, "objectClass"); - - /* If no part of this touches the objectClass, then we don't - * need to make any changes. */ - /* If the only operation is the deletion of the objectClass then go on */ - if (!objectclass_element) { - return ldb_next_request(module, req); - } - - switch (objectclass_element->flags & LDB_FLAG_MOD_MASK) { - case LDB_FLAG_MOD_DELETE: - /* Delete everything? Probably totally illigal, but hey! */ - if (objectclass_element->num_values == 0) { - return ldb_next_request(module, req); - } - break; - case LDB_FLAG_MOD_REPLACE: - { - struct ldb_request *down_req; - struct class_list *sorted, *current; - TALLOC_CTX *mem_ctx; - int ret; - mem_ctx = talloc_new(req); - if (mem_ctx == NULL) { - return LDB_ERR_OPERATIONS_ERROR; - } - - /* prepare the first operation */ - down_req = talloc(req, struct ldb_request); - if (down_req == NULL) { - ldb_set_errstring(module->ldb, "Out of memory!"); - talloc_free(mem_ctx); - return LDB_ERR_OPERATIONS_ERROR; - } - - *down_req = *req; /* copy the request */ - - down_req->op.mod.message = msg = ldb_msg_copy_shallow(down_req, req->op.mod.message); - - if (down_req->op.add.message == NULL) { - talloc_free(mem_ctx); - return LDB_ERR_OPERATIONS_ERROR; - } - - ret = objectclass_sort(module, mem_ctx, objectclass_element, &sorted); - if (ret != LDB_SUCCESS) { - return ret; - } - - /* We must completely replace the existing objectClass entry, - * because we need it sorted */ - - ldb_msg_remove_attr(msg, "objectClass"); - ret = ldb_msg_add_empty(msg, "objectClass", LDB_FLAG_MOD_REPLACE, NULL); - - if (ret != LDB_SUCCESS) { - talloc_free(mem_ctx); - return ret; - } - - /* Move from the linked list back into an ldb msg */ - for (current = sorted; current; current = current->next) { - ret = ldb_msg_add_string(msg, "objectClass", current->objectclass); - if (ret != LDB_SUCCESS) { - ldb_set_errstring(module->ldb, "objectclass: could not re-add sorted objectclass to modify msg"); - talloc_free(mem_ctx); - return ret; - } - } - - talloc_free(mem_ctx); - - ret = ldb_msg_sanity_check(module->ldb, msg); - if (ret != LDB_SUCCESS) { - talloc_free(mem_ctx); - return ret; - } - - /* go on with the call chain */ - ret = ldb_next_request(module, down_req); - - /* do not free down_req as the call results may be linked to it, - * it will be freed when the upper level request get freed */ - if (ret == LDB_SUCCESS) { - req->handle = down_req->handle; - } - return ret; - } - } - - { - struct ldb_handle *h; - struct oc_context *ac; - - h = oc_init_handle(req, module); - if (!h) { - return LDB_ERR_OPERATIONS_ERROR; - } - ac = talloc_get_type(h->private_data, struct oc_context); - - /* return or own handle to deal with this call */ - req->handle = h; - - /* prepare the first operation */ - ac->down_req = talloc(ac, struct ldb_request); - if (ac->down_req == NULL) { - ldb_set_errstring(module->ldb, "Out of memory!"); - return LDB_ERR_OPERATIONS_ERROR; - } - - *(ac->down_req) = *req; /* copy the request */ - - ac->down_req->context = NULL; - ac->down_req->callback = NULL; - ldb_set_timeout_from_prev_req(module->ldb, req, ac->down_req); - - ac->step = OC_DO_REQ; - - return ldb_next_request(module, ac->down_req); - } -} - -static int get_self_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares) -{ - struct oc_context *ac; - - if (!context || !ares) { - ldb_set_errstring(ldb, "NULL Context or Result in callback"); - return LDB_ERR_OPERATIONS_ERROR; - } - - ac = talloc_get_type(context, struct oc_context); - - /* we are interested only in the single reply (base search) we receive here */ - if (ares->type == LDB_REPLY_ENTRY) { - if (ac->search_res != NULL) { - ldb_set_errstring(ldb, "Too many results"); - talloc_free(ares); - return LDB_ERR_OPERATIONS_ERROR; - } - - ac->search_res = talloc_move(ac, &ares); - } else { - talloc_free(ares); - } - - return LDB_SUCCESS; -} - -static int objectclass_search_self(struct ldb_handle *h) { - - struct oc_context *ac; - static const char * const attrs[] = { "objectClass", NULL }; - - ac = talloc_get_type(h->private_data, struct oc_context); - - /* prepare the search operation */ - ac->search_req = talloc_zero(ac, struct ldb_request); - if (ac->search_req == NULL) { - ldb_debug(ac->module->ldb, LDB_DEBUG_ERROR, "Out of Memory!\n"); - return LDB_ERR_OPERATIONS_ERROR; - } - - ac->search_req->operation = LDB_SEARCH; - ac->search_req->op.search.base = ac->orig_req->op.mod.message->dn; - ac->search_req->op.search.scope = LDB_SCOPE_BASE; - ac->search_req->op.search.tree = ldb_parse_tree(ac->search_req, NULL); - if (ac->search_req->op.search.tree == NULL) { - ldb_set_errstring(ac->module->ldb, "objectclass: Internal error producing null search"); - return LDB_ERR_OPERATIONS_ERROR; - } - ac->search_req->op.search.attrs = attrs; - ac->search_req->controls = NULL; - ac->search_req->context = ac; - ac->search_req->callback = get_self_callback; - ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->search_req); - - ac->step = OC_SEARCH_SELF; - - return ldb_next_request(ac->module, ac->search_req); -} - -static int objectclass_do_mod(struct ldb_handle *h) { - - struct oc_context *ac; - struct ldb_message_element *objectclass_element; - struct ldb_message *msg; - TALLOC_CTX *mem_ctx; - struct class_list *sorted, *current; - int ret; - - ac = talloc_get_type(h->private_data, struct oc_context); - - mem_ctx = talloc_new(ac); - if (mem_ctx == NULL) { - return LDB_ERR_OPERATIONS_ERROR; - } - - ac->mod_req = talloc(ac, struct ldb_request); - if (ac->mod_req == NULL) { - talloc_free(mem_ctx); - return LDB_ERR_OPERATIONS_ERROR; - } - - ac->mod_req->operation = LDB_MODIFY; - ac->mod_req->controls = NULL; - ac->mod_req->context = ac; - ac->mod_req->callback = NULL; - ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->mod_req); - - /* use a new message structure */ - ac->mod_req->op.mod.message = msg = ldb_msg_new(ac->mod_req); - if (msg == NULL) { - ldb_set_errstring(ac->module->ldb, "objectclass: could not create new modify msg"); - talloc_free(mem_ctx); - return LDB_ERR_OPERATIONS_ERROR; - } - - /* This is now the objectClass list from the database */ - objectclass_element = ldb_msg_find_element(ac->search_res->message, - "objectClass"); - if (!objectclass_element) { - /* Where did it go? Move along now, nothing to see here */ - talloc_free(mem_ctx); - return LDB_SUCCESS; - } - - /* modify dn */ - msg->dn = ac->orig_req->op.mod.message->dn; - - ret = objectclass_sort(ac->module, mem_ctx, objectclass_element, &sorted); - if (ret != LDB_SUCCESS) { - return ret; - } - - /* We must completely replace the existing objectClass entry. - * We could do a constrained add/del, but we are meant to be - * in a transaction... */ - - ret = ldb_msg_add_empty(msg, "objectClass", LDB_FLAG_MOD_REPLACE, NULL); - if (ret != LDB_SUCCESS) { - ldb_set_errstring(ac->module->ldb, "objectclass: could not clear objectclass in modify msg"); - talloc_free(mem_ctx); - return ret; - } - - /* Move from the linked list back into an ldb msg */ - for (current = sorted; current; current = current->next) { - ret = ldb_msg_add_string(msg, "objectClass", current->objectclass); - if (ret != LDB_SUCCESS) { - ldb_set_errstring(ac->module->ldb, "objectclass: could not re-add sorted objectclass to modify msg"); - talloc_free(mem_ctx); - return ret; - } - } - - ret = ldb_msg_sanity_check(ac->module->ldb, msg); - if (ret != LDB_SUCCESS) { - talloc_free(mem_ctx); - return ret; - } - - - h->state = LDB_ASYNC_INIT; - h->status = LDB_SUCCESS; - - ac->step = OC_DO_MOD; - - talloc_free(mem_ctx); - /* perform the search */ - return ldb_next_request(ac->module, ac->mod_req); -} - -static int oc_wait(struct ldb_handle *handle) { - struct oc_context *ac; - int ret; - - if (!handle || !handle->private_data) { - return LDB_ERR_OPERATIONS_ERROR; - } - - if (handle->state == LDB_ASYNC_DONE) { - return handle->status; - } - - handle->state = LDB_ASYNC_PENDING; - handle->status = LDB_SUCCESS; - - ac = talloc_get_type(handle->private_data, struct oc_context); - - switch (ac->step) { - case OC_DO_REQ: - ret = ldb_wait(ac->down_req->handle, LDB_WAIT_NONE); - - if (ret != LDB_SUCCESS) { - handle->status = ret; - goto done; - } - if (ac->down_req->handle->status != LDB_SUCCESS) { - handle->status = ac->down_req->handle->status; - goto done; - } - - if (ac->down_req->handle->state != LDB_ASYNC_DONE) { - return LDB_SUCCESS; - } - - /* mods done, go on */ - return objectclass_search_self(handle); - - case OC_SEARCH_SELF: - ret = ldb_wait(ac->search_req->handle, LDB_WAIT_NONE); - - if (ret != LDB_SUCCESS) { - handle->status = ret; - goto done; - } - if (ac->search_req->handle->status != LDB_SUCCESS) { - handle->status = ac->search_req->handle->status; - goto done; - } - - if (ac->search_req->handle->state != LDB_ASYNC_DONE) { - return LDB_SUCCESS; - } - - /* self search done, go on */ - return objectclass_do_mod(handle); - - case OC_DO_MOD: - ret = ldb_wait(ac->mod_req->handle, LDB_WAIT_NONE); - - if (ret != LDB_SUCCESS) { - handle->status = ret; - goto done; - } - if (ac->mod_req->handle->status != LDB_SUCCESS) { - handle->status = ac->mod_req->handle->status; - goto done; - } - - if (ac->mod_req->handle->state != LDB_ASYNC_DONE) { - return LDB_SUCCESS; - } - - break; - - default: - ret = LDB_ERR_OPERATIONS_ERROR; - goto done; - } - - ret = LDB_SUCCESS; - -done: - handle->state = LDB_ASYNC_DONE; - return ret; -} - -static int oc_wait_all(struct ldb_handle *handle) { - - int ret; - - while (handle->state != LDB_ASYNC_DONE) { - ret = oc_wait(handle); - if (ret != LDB_SUCCESS) { - return ret; - } - } - - return handle->status; -} - -static int objectclass_wait(struct ldb_handle *handle, enum ldb_wait_type type) -{ - if (type == LDB_WAIT_ALL) { - return oc_wait_all(handle); - } else { - return oc_wait(handle); - } -} - -static const struct ldb_module_ops objectclass_ops = { - .name = "objectclass", - .add = objectclass_add, - .modify = objectclass_modify, - .wait = objectclass_wait -}; - -int ldb_objectclass_init(void) -{ - return ldb_register_module(&objectclass_ops); -} - |