diff options
Diffstat (limited to 'source3/lib/ldb/modules/ldb_map_outbound.c')
| -rw-r--r-- | source3/lib/ldb/modules/ldb_map_outbound.c | 1285 |
1 files changed, 0 insertions, 1285 deletions
diff --git a/source3/lib/ldb/modules/ldb_map_outbound.c b/source3/lib/ldb/modules/ldb_map_outbound.c deleted file mode 100644 index a02d26dcea..0000000000 --- a/source3/lib/ldb/modules/ldb_map_outbound.c +++ /dev/null @@ -1,1285 +0,0 @@ -/* - ldb database mapping module - - Copyright (C) Jelmer Vernooij 2005 - Copyright (C) Martin Kuehl <mkhl@samba.org> 2006 - Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006 - - * NOTICE: this module is NOT released under the GNU LGPL license as - * other ldb code. This module is release under the GNU GPL v2 or - * later license. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program 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 General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. -*/ - -#include "includes.h" -#include "ldb/include/includes.h" - -#include "ldb/modules/ldb_map.h" -#include "ldb/modules/ldb_map_private.h" - - -/* Mapping attributes - * ================== */ - -/* Select attributes that stay in the local partition. */ -static const char **map_attrs_select_local(struct ldb_module *module, void *mem_ctx, const char * const *attrs) -{ - const struct ldb_map_context *data = map_get_context(module); - const char **result; - int i, last; - - if (attrs == NULL) - return NULL; - - last = 0; - result = talloc_array(mem_ctx, const char *, 1); - if (result == NULL) { - goto failed; - } - result[0] = NULL; - - for (i = 0; attrs[i]; i++) { - /* Wildcards and ignored attributes are kept locally */ - if ((ldb_attr_cmp(attrs[i], "*") == 0) || - (!map_attr_check_remote(data, attrs[i]))) { - result = talloc_realloc(mem_ctx, result, const char *, last+2); - if (result == NULL) { - goto failed; - } - - result[last] = talloc_strdup(result, attrs[i]); - result[last+1] = NULL; - last++; - } - } - - return result; - -failed: - talloc_free(result); - map_oom(module); - return NULL; -} - -/* Collect attributes that are mapped into the remote partition. */ -static const char **map_attrs_collect_remote(struct ldb_module *module, void *mem_ctx, - const char * const *attrs) -{ - const struct ldb_map_context *data = map_get_context(module); - const char **result; - const struct ldb_map_attribute *map; - const char *name=NULL; - int i, j, last; - int ret; - - last = 0; - result = talloc_array(mem_ctx, const char *, 1); - if (result == NULL) { - goto failed; - } - result[0] = NULL; - - for (i = 0; attrs[i]; i++) { - /* Wildcards are kept remotely, too */ - if (ldb_attr_cmp(attrs[i], "*") == 0) { - const char **new_attrs = NULL; - ret = map_attrs_merge(module, mem_ctx, &new_attrs, attrs); - if (ret != LDB_SUCCESS) { - goto failed; - } - ret = map_attrs_merge(module, mem_ctx, &new_attrs, data->wildcard_attributes); - if (ret != LDB_SUCCESS) { - goto failed; - } - - attrs = new_attrs; - break; - } - } - - for (i = 0; attrs[i]; i++) { - /* Wildcards are kept remotely, too */ - if (ldb_attr_cmp(attrs[i], "*") == 0) { - /* Add all 'include in wildcard' attributes */ - name = attrs[i]; - goto named; - } - - /* Add remote names of mapped attrs */ - map = map_attr_find_local(data, attrs[i]); - if (map == NULL) { - continue; - } - - switch (map->type) { - case MAP_IGNORE: - continue; - - case MAP_KEEP: - name = attrs[i]; - goto named; - - case MAP_RENAME: - case MAP_CONVERT: - name = map->u.rename.remote_name; - goto named; - - case MAP_GENERATE: - /* Add all remote names of "generate" attrs */ - for (j = 0; map->u.generate.remote_names[j]; j++) { - result = talloc_realloc(mem_ctx, result, const char *, last+2); - if (result == NULL) { - goto failed; - } - - result[last] = talloc_strdup(result, map->u.generate.remote_names[j]); - result[last+1] = NULL; - last++; - } - continue; - } - - named: /* We found a single remote name, add that */ - result = talloc_realloc(mem_ctx, result, const char *, last+2); - if (result == NULL) { - goto failed; - } - - result[last] = talloc_strdup(result, name); - result[last+1] = NULL; - last++; - } - - return result; - -failed: - talloc_free(result); - map_oom(module); - return NULL; -} - -/* Split attributes that stay in the local partition from those that - * are mapped into the remote partition. */ -static int map_attrs_partition(struct ldb_module *module, void *mem_ctx, const char ***local_attrs, const char ***remote_attrs, const char * const *attrs) -{ - *local_attrs = map_attrs_select_local(module, mem_ctx, attrs); - *remote_attrs = map_attrs_collect_remote(module, mem_ctx, attrs); - - return 0; -} - -/* Mapping message elements - * ======================== */ - -/* Add an element to a message, overwriting any old identically named elements. */ -static int ldb_msg_replace(struct ldb_message *msg, const struct ldb_message_element *el) -{ - struct ldb_message_element *old; - - old = ldb_msg_find_element(msg, el->name); - - /* no local result, add as new element */ - if (old == NULL) { - if (ldb_msg_add_empty(msg, el->name, 0, &old) != 0) { - return -1; - } - talloc_free(old->name); - } - - /* copy new element */ - *old = *el; - - /* and make sure we reference the contents */ - if (!talloc_reference(msg->elements, el->name)) { - return -1; - } - if (!talloc_reference(msg->elements, el->values)) { - return -1; - } - - return 0; -} - -/* Map a message element back into the local partition. */ -static struct ldb_message_element *ldb_msg_el_map_remote(struct ldb_module *module, - void *mem_ctx, - const struct ldb_map_attribute *map, - const char *attr_name, - const struct ldb_message_element *old) -{ - struct ldb_message_element *el; - int i; - - el = talloc_zero(mem_ctx, struct ldb_message_element); - if (el == NULL) { - map_oom(module); - return NULL; - } - - el->num_values = old->num_values; - el->values = talloc_array(el, struct ldb_val, el->num_values); - if (el->values == NULL) { - talloc_free(el); - map_oom(module); - return NULL; - } - - el->name = talloc_strdup(el, attr_name); - if (el->name == NULL) { - talloc_free(el); - map_oom(module); - return NULL; - } - - for (i = 0; i < el->num_values; i++) { - el->values[i] = ldb_val_map_remote(module, el->values, map, &old->values[i]); - } - - return el; -} - -/* Merge a remote message element into a local message. */ -static int ldb_msg_el_merge(struct ldb_module *module, struct ldb_message *local, - struct ldb_message *remote, const char *attr_name) -{ - const struct ldb_map_context *data = map_get_context(module); - const struct ldb_map_attribute *map; - struct ldb_message_element *old, *el=NULL; - const char *remote_name = NULL; - - /* We handle wildcards in ldb_msg_el_merge_wildcard */ - if (ldb_attr_cmp(attr_name, "*") == 0) { - return 0; - } - - map = map_attr_find_local(data, attr_name); - - /* Unknown attribute in remote message: - * skip, attribute was probably auto-generated */ - if (map == NULL) { - return 0; - } - - switch (map->type) { - case MAP_IGNORE: - break; - case MAP_CONVERT: - remote_name = map->u.convert.remote_name; - break; - case MAP_KEEP: - remote_name = attr_name; - break; - case MAP_RENAME: - remote_name = map->u.rename.remote_name; - break; - case MAP_GENERATE: - break; - } - - switch (map->type) { - case MAP_IGNORE: - return 0; - - case MAP_CONVERT: - if (map->u.convert.convert_remote == NULL) { - ldb_debug(module->ldb, LDB_DEBUG_ERROR, "ldb_map: " - "Skipping attribute '%s': " - "'convert_remote' not set\n", - attr_name); - return 0; - } - /* fall through */ - case MAP_KEEP: - case MAP_RENAME: - old = ldb_msg_find_element(remote, remote_name); - if (old) { - el = ldb_msg_el_map_remote(module, local, map, attr_name, old); - } else { - return LDB_ERR_NO_SUCH_ATTRIBUTE; - } - break; - - case MAP_GENERATE: - if (map->u.generate.generate_local == NULL) { - ldb_debug(module->ldb, LDB_DEBUG_ERROR, "ldb_map: " - "Skipping attribute '%s': " - "'generate_local' not set\n", - attr_name); - return 0; - } - - el = map->u.generate.generate_local(module, local, attr_name, remote); - if (!el) { - /* Generation failure is probably due to lack of source attributes */ - return LDB_ERR_NO_SUCH_ATTRIBUTE; - } - break; - } - - if (el == NULL) { - return LDB_ERR_OPERATIONS_ERROR; - } - - return ldb_msg_replace(local, el); -} - -/* Handle wildcard parts of merging a remote message element into a local message. */ -static int ldb_msg_el_merge_wildcard(struct ldb_module *module, struct ldb_message *local, - struct ldb_message *remote) -{ - const struct ldb_map_context *data = map_get_context(module); - const struct ldb_map_attribute *map = map_attr_find_local(data, "*"); - struct ldb_message_element *el=NULL; - int i, ret; - - /* Perhaps we have a mapping for "*" */ - if (map && map->type == MAP_KEEP) { - /* We copy everything over, and hope that anything with a - more specific rule is overwritten */ - for (i = 0; i < remote->num_elements; i++) { - el = ldb_msg_el_map_remote(module, local, map, remote->elements[i].name, - &remote->elements[i]); - if (el == NULL) { - return LDB_ERR_OPERATIONS_ERROR; - } - - ret = ldb_msg_replace(local, el); - if (ret) { - return ret; - } - } - } - - /* Now walk the list of possible mappings, and apply each */ - for (i = 0; data->attribute_maps[i].local_name; i++) { - ret = ldb_msg_el_merge(module, local, remote, - data->attribute_maps[i].local_name); - if (ret == LDB_ERR_NO_SUCH_ATTRIBUTE) { - continue; - } else if (ret) { - return ret; - } else { - continue; - } - } - - return 0; -} - -/* Mapping messages - * ================ */ - -/* Merge two local messages into a single one. */ -static int ldb_msg_merge_local(struct ldb_module *module, struct ldb_message *msg1, struct ldb_message *msg2) -{ - int i, ret; - - for (i = 0; i < msg2->num_elements; i++) { - ret = ldb_msg_replace(msg1, &msg2->elements[i]); - if (ret) { - return ret; - } - } - - return 0; -} - -/* Merge a local and a remote message into a single local one. */ -static int ldb_msg_merge_remote(struct map_context *ac, struct ldb_message *local, - struct ldb_message *remote) -{ - int i, ret; - const char * const *attrs = ac->all_attrs; - if (!attrs) { - ret = ldb_msg_el_merge_wildcard(ac->module, local, remote); - if (ret) { - return ret; - } - } - - for (i = 0; attrs && attrs[i]; i++) { - if (ldb_attr_cmp(attrs[i], "*") == 0) { - ret = ldb_msg_el_merge_wildcard(ac->module, local, remote); - if (ret) { - return ret; - } - break; - } - } - - /* Try to map each attribute back; - * Add to local message is possible, - * Overwrite old local attribute if necessary */ - for (i = 0; attrs && attrs[i]; i++) { - ret = ldb_msg_el_merge(ac->module, local, remote, - attrs[i]); - if (ret == LDB_ERR_NO_SUCH_ATTRIBUTE) { - } else if (ret) { - return ret; - } - } - - return 0; -} - -/* Mapping search results - * ====================== */ - -/* Map a search result back into the local partition. */ -static int map_reply_remote(struct map_context *ac, struct ldb_reply *ares) -{ - struct ldb_message *msg; - struct ldb_dn *dn; - int ret; - - /* There is no result message, skip */ - if (ares->type != LDB_REPLY_ENTRY) { - return 0; - } - - /* Create a new result message */ - msg = ldb_msg_new(ares); - if (msg == NULL) { - map_oom(ac->module); - return -1; - } - - /* Merge remote message into new message */ - ret = ldb_msg_merge_remote(ac, msg, ares->message); - if (ret) { - talloc_free(msg); - return ret; - } - - /* Create corresponding local DN */ - dn = ldb_dn_map_rebase_remote(ac->module, msg, ares->message->dn); - if (dn == NULL) { - talloc_free(msg); - return -1; - } - msg->dn = dn; - - /* Store new message with new DN as the result */ - talloc_free(ares->message); - ares->message = msg; - - return 0; -} - -/* Mapping parse trees - * =================== */ - -/* Check whether a parse tree can safely be split in two. */ -static BOOL ldb_parse_tree_check_splittable(const struct ldb_parse_tree *tree) -{ - const struct ldb_parse_tree *subtree = tree; - BOOL negate = False; - - while (subtree) { - switch (subtree->operation) { - case LDB_OP_NOT: - negate = !negate; - subtree = subtree->u.isnot.child; - continue; - - case LDB_OP_AND: - return !negate; /* if negate: False */ - - case LDB_OP_OR: - return negate; /* if negate: True */ - - default: - return True; /* simple parse tree */ - } - } - - return True; /* no parse tree */ -} - -/* Collect a list of attributes required to match a given parse tree. */ -static int ldb_parse_tree_collect_attrs(struct ldb_module *module, void *mem_ctx, const char ***attrs, const struct ldb_parse_tree *tree) -{ - const char **new_attrs; - int i, ret; - - if (tree == NULL) { - return 0; - } - - switch (tree->operation) { - case LDB_OP_OR: - case LDB_OP_AND: /* attributes stored in list of subtrees */ - for (i = 0; i < tree->u.list.num_elements; i++) { - ret = ldb_parse_tree_collect_attrs(module, mem_ctx, - attrs, tree->u.list.elements[i]); - if (ret) { - return ret; - } - } - return 0; - - case LDB_OP_NOT: /* attributes stored in single subtree */ - return ldb_parse_tree_collect_attrs(module, mem_ctx, attrs, tree->u.isnot.child); - - default: /* single attribute in tree */ - new_attrs = ldb_attr_list_copy_add(mem_ctx, *attrs, tree->u.equality.attr); - talloc_free(*attrs); - *attrs = new_attrs; - return 0; - } - - return -1; -} - -static int map_subtree_select_local(struct ldb_module *module, void *mem_ctx, struct ldb_parse_tree **new, const struct ldb_parse_tree *tree); - -/* Select a negated subtree that queries attributes in the local partition */ -static int map_subtree_select_local_not(struct ldb_module *module, void *mem_ctx, struct ldb_parse_tree **new, const struct ldb_parse_tree *tree) -{ - struct ldb_parse_tree *child; - int ret; - - /* Prepare new tree */ - *new = talloc_memdup(mem_ctx, tree, sizeof(struct ldb_parse_tree)); - if (*new == NULL) { - map_oom(module); - return -1; - } - - /* Generate new subtree */ - ret = map_subtree_select_local(module, *new, &child, tree->u.isnot.child); - if (ret) { - talloc_free(*new); - return ret; - } - - /* Prune tree without subtree */ - if (child == NULL) { - talloc_free(*new); - *new = NULL; - return 0; - } - - (*new)->u.isnot.child = child; - - return ret; -} - -/* Select a list of subtrees that query attributes in the local partition */ -static int map_subtree_select_local_list(struct ldb_module *module, void *mem_ctx, struct ldb_parse_tree **new, const struct ldb_parse_tree *tree) -{ - int i, j, ret=0; - - /* Prepare new tree */ - *new = talloc_memdup(mem_ctx, tree, sizeof(struct ldb_parse_tree)); - if (*new == NULL) { - map_oom(module); - return -1; - } - - /* Prepare list of subtrees */ - (*new)->u.list.num_elements = 0; - (*new)->u.list.elements = talloc_array(*new, struct ldb_parse_tree *, tree->u.list.num_elements); - if ((*new)->u.list.elements == NULL) { - map_oom(module); - talloc_free(*new); - return -1; - } - - /* Generate new list of subtrees */ - j = 0; - for (i = 0; i < tree->u.list.num_elements; i++) { - struct ldb_parse_tree *child; - ret = map_subtree_select_local(module, *new, &child, tree->u.list.elements[i]); - if (ret) { - talloc_free(*new); - return ret; - } - - if (child) { - (*new)->u.list.elements[j] = child; - j++; - } - } - - /* Prune tree without subtrees */ - if (j == 0) { - talloc_free(*new); - *new = NULL; - return 0; - } - - /* Fix subtree list size */ - (*new)->u.list.num_elements = j; - (*new)->u.list.elements = talloc_realloc(*new, (*new)->u.list.elements, struct ldb_parse_tree *, (*new)->u.list.num_elements); - - return ret; -} - -/* Select a simple subtree that queries attributes in the local partition */ -static int map_subtree_select_local_simple(struct ldb_module *module, void *mem_ctx, struct ldb_parse_tree **new, const struct ldb_parse_tree *tree) -{ - /* Prepare new tree */ - *new = talloc_memdup(mem_ctx, tree, sizeof(struct ldb_parse_tree)); - if (*new == NULL) { - map_oom(module); - return -1; - } - - return 0; -} - -/* Select subtrees that query attributes in the local partition */ -static int map_subtree_select_local(struct ldb_module *module, void *mem_ctx, struct ldb_parse_tree **new, const struct ldb_parse_tree *tree) -{ - const struct ldb_map_context *data = map_get_context(module); - - if (tree == NULL) { - return 0; - } - - if (tree->operation == LDB_OP_NOT) { - return map_subtree_select_local_not(module, mem_ctx, new, tree); - } - - if (tree->operation == LDB_OP_AND || tree->operation == LDB_OP_OR) { - return map_subtree_select_local_list(module, mem_ctx, new, tree); - } - - if (map_attr_check_remote(data, tree->u.equality.attr)) { - *new = NULL; - return 0; - } - - return map_subtree_select_local_simple(module, mem_ctx, new, tree); -} - -static int map_subtree_collect_remote(struct ldb_module *module, void *mem_ctx, struct ldb_parse_tree **new, const struct ldb_parse_tree *tree); - -/* Collect a negated subtree that queries attributes in the remote partition */ -static int map_subtree_collect_remote_not(struct ldb_module *module, void *mem_ctx, struct ldb_parse_tree **new, const struct ldb_parse_tree *tree) -{ - struct ldb_parse_tree *child; - int ret; - - /* Prepare new tree */ - *new = talloc_memdup(mem_ctx, tree, sizeof(struct ldb_parse_tree)); - if (*new == NULL) { - map_oom(module); - return -1; - } - - /* Generate new subtree */ - ret = map_subtree_collect_remote(module, *new, &child, tree->u.isnot.child); - if (ret) { - talloc_free(*new); - return ret; - } - - /* Prune tree without subtree */ - if (child == NULL) { - talloc_free(*new); - *new = NULL; - return 0; - } - - (*new)->u.isnot.child = child; - - return ret; -} - -/* Collect a list of subtrees that query attributes in the remote partition */ -static int map_subtree_collect_remote_list(struct ldb_module *module, void *mem_ctx, struct ldb_parse_tree **new, const struct ldb_parse_tree *tree) -{ - int i, j, ret=0; - - /* Prepare new tree */ - *new = talloc_memdup(mem_ctx, tree, sizeof(struct ldb_parse_tree)); - if (*new == NULL) { - map_oom(module); - return -1; - } - - /* Prepare list of subtrees */ - (*new)->u.list.num_elements = 0; - (*new)->u.list.elements = talloc_array(*new, struct ldb_parse_tree *, tree->u.list.num_elements); - if ((*new)->u.list.elements == NULL) { - map_oom(module); - talloc_free(*new); - return -1; - } - - /* Generate new list of subtrees */ - j = 0; - for (i = 0; i < tree->u.list.num_elements; i++) { - struct ldb_parse_tree *child; - ret = map_subtree_collect_remote(module, *new, &child, tree->u.list.elements[i]); - if (ret) { - talloc_free(*new); - return ret; - } - - if (child) { - (*new)->u.list.elements[j] = child; - j++; - } - } - - /* Prune tree without subtrees */ - if (j == 0) { - talloc_free(*new); - *new = NULL; - return 0; - } - - /* Fix subtree list size */ - (*new)->u.list.num_elements = j; - (*new)->u.list.elements = talloc_realloc(*new, (*new)->u.list.elements, struct ldb_parse_tree *, (*new)->u.list.num_elements); - - return ret; -} - -/* Collect a simple subtree that queries attributes in the remote partition */ -int map_subtree_collect_remote_simple(struct ldb_module *module, void *mem_ctx, struct ldb_parse_tree **new, const struct ldb_parse_tree *tree, const struct ldb_map_attribute *map) -{ - const char *attr; - - /* Prepare new tree */ - *new = talloc(mem_ctx, struct ldb_parse_tree); - if (*new == NULL) { - map_oom(module); - return -1; - } - **new = *tree; - - if (map->type == MAP_KEEP) { - /* Nothing to do here */ - return 0; - } - - /* Store attribute and value in new tree */ - switch (tree->operation) { - case LDB_OP_PRESENT: - attr = map_attr_map_local(*new, map, tree->u.present.attr); - (*new)->u.present.attr = attr; - break; - case LDB_OP_SUBSTRING: - { - attr = map_attr_map_local(*new, map, tree->u.substring.attr); - (*new)->u.substring.attr = attr; - break; - } - case LDB_OP_EQUALITY: - attr = map_attr_map_local(*new, map, tree->u.equality.attr); - (*new)->u.equality.attr = attr; - break; - case LDB_OP_LESS: - case LDB_OP_GREATER: - case LDB_OP_APPROX: - attr = map_attr_map_local(*new, map, tree->u.comparison.attr); - (*new)->u.comparison.attr = attr; - break; - case LDB_OP_EXTENDED: - attr = map_attr_map_local(*new, map, tree->u.extended.attr); - (*new)->u.extended.attr = attr; - break; - default: /* unknown kind of simple subtree */ - talloc_free(*new); - return -1; - } - - if (attr == NULL) { - talloc_free(*new); - *new = NULL; - return 0; - } - - if (map->type == MAP_RENAME) { - /* Nothing more to do here, the attribute has been renamed */ - return 0; - } - - /* Store attribute and value in new tree */ - switch (tree->operation) { - case LDB_OP_PRESENT: - break; - case LDB_OP_SUBSTRING: - { - int i; - /* Map value */ - (*new)->u.substring.chunks = NULL; - for (i=0; tree->u.substring.chunks[i]; i++) { - (*new)->u.substring.chunks = talloc_realloc(*new, (*new)->u.substring.chunks, struct ldb_val *, i+2); - if (!(*new)->u.substring.chunks) { - talloc_free(*new); - *new = NULL; - return 0; - } - (*new)->u.substring.chunks[i] = talloc(*new, struct ldb_val); - if (!(*new)->u.substring.chunks[i]) { - talloc_free(*new); - *new = NULL; - return 0; - } - *(*new)->u.substring.chunks[i] = ldb_val_map_local(module, *new, map, tree->u.substring.chunks[i]); - (*new)->u.substring.chunks[i+1] = NULL; - } - break; - } - case LDB_OP_EQUALITY: - (*new)->u.equality.value = ldb_val_map_local(module, *new, map, &tree->u.equality.value); - break; - case LDB_OP_LESS: - case LDB_OP_GREATER: - case LDB_OP_APPROX: - (*new)->u.comparison.value = ldb_val_map_local(module, *new, map, &tree->u.comparison.value); - break; - case LDB_OP_EXTENDED: - (*new)->u.extended.value = ldb_val_map_local(module, *new, map, &tree->u.extended.value); - (*new)->u.extended.rule_id = talloc_strdup(*new, tree->u.extended.rule_id); - break; - default: /* unknown kind of simple subtree */ - talloc_free(*new); - return -1; - } - - return 0; -} - -/* Collect subtrees that query attributes in the remote partition */ -static int map_subtree_collect_remote(struct ldb_module *module, void *mem_ctx, struct ldb_parse_tree **new, const struct ldb_parse_tree *tree) -{ - const struct ldb_map_context *data = map_get_context(module); - const struct ldb_map_attribute *map; - - if (tree == NULL) { - return 0; - } - - if (tree->operation == LDB_OP_NOT) { - return map_subtree_collect_remote_not(module, mem_ctx, new, tree); - } - - if ((tree->operation == LDB_OP_AND) || (tree->operation == LDB_OP_OR)) { - return map_subtree_collect_remote_list(module, mem_ctx, new, tree); - } - - if (!map_attr_check_remote(data, tree->u.equality.attr)) { - *new = NULL; - return 0; - } - - map = map_attr_find_local(data, tree->u.equality.attr); - if (map->convert_operator) { - return map->convert_operator(module, mem_ctx, new, tree); - } - - if (map->type == MAP_GENERATE) { - ldb_debug(module->ldb, LDB_DEBUG_WARNING, "ldb_map: " - "Skipping attribute '%s': " - "'convert_operator' not set\n", - tree->u.equality.attr); - *new = NULL; - return 0; - } - - return map_subtree_collect_remote_simple(module, mem_ctx, new, tree, map); -} - -/* Split subtrees that query attributes in the local partition from - * those that query the remote partition. */ -static int ldb_parse_tree_partition(struct ldb_module *module, void *local_ctx, void *remote_ctx, struct ldb_parse_tree **local_tree, struct ldb_parse_tree **remote_tree, const struct ldb_parse_tree *tree) -{ - int ret; - - *local_tree = NULL; - *remote_tree = NULL; - - /* No original tree */ - if (tree == NULL) { - return 0; - } - - /* Generate local tree */ - ret = map_subtree_select_local(module, local_ctx, local_tree, tree); - if (ret) { - return ret; - } - - /* Generate remote tree */ - ret = map_subtree_collect_remote(module, remote_ctx, remote_tree, tree); - if (ret) { - talloc_free(*local_tree); - return ret; - } - - return 0; -} - -/* Collect a list of attributes required either explicitly from a - * given list or implicitly from a given parse tree; split the - * collected list into local and remote parts. */ -static int map_attrs_collect_and_partition(struct ldb_module *module, struct map_context *ac, - const char * const *search_attrs, - const struct ldb_parse_tree *tree) -{ - void *tmp_ctx; - const char **tree_attrs; - const char **remote_attrs; - const char **local_attrs; - int ret; - - /* Clear initial lists of partitioned attributes */ - - /* Clear initial lists of partitioned attributes */ - - /* There is no tree, just partition the searched attributes */ - if (tree == NULL) { - ret = map_attrs_partition(module, ac, - &local_attrs, &remote_attrs, search_attrs); - if (ret == 0) { - ac->local_attrs = local_attrs; - ac->remote_attrs = remote_attrs; - ac->all_attrs = search_attrs; - } - return ret; - } - - /* Create context for temporary memory */ - tmp_ctx = talloc_new(ac); - if (tmp_ctx == NULL) { - goto oom; - } - - /* Prepare list of attributes from tree */ - tree_attrs = talloc_array(tmp_ctx, const char *, 1); - if (tree_attrs == NULL) { - talloc_free(tmp_ctx); - goto oom; - } - tree_attrs[0] = NULL; - - /* Collect attributes from tree */ - ret = ldb_parse_tree_collect_attrs(module, tmp_ctx, &tree_attrs, tree); - if (ret) { - goto done; - } - - /* Merge attributes from search operation */ - ret = map_attrs_merge(module, tmp_ctx, &tree_attrs, search_attrs); - if (ret) { - goto done; - } - - /* Split local from remote attributes */ - ret = map_attrs_partition(module, ac, &local_attrs, - &remote_attrs, tree_attrs); - - if (ret == 0) { - ac->local_attrs = local_attrs; - ac->remote_attrs = remote_attrs; - talloc_steal(ac, tree_attrs); - ac->all_attrs = tree_attrs; - } -done: - /* Free temporary memory */ - talloc_free(tmp_ctx); - return ret; - -oom: - map_oom(module); - return -1; -} - - -/* Outbound requests: search - * ========================= */ - -/* Pass a merged search result up the callback chain. */ -int map_up_callback(struct ldb_context *ldb, const struct ldb_request *req, struct ldb_reply *ares) -{ - int i; - - /* No callback registered, stop */ - if (req->callback == NULL) { - return LDB_SUCCESS; - } - - /* Only records need special treatment */ - if (ares->type != LDB_REPLY_ENTRY) { - return req->callback(ldb, req->context, ares); - } - - /* Merged result doesn't match original query, skip */ - if (!ldb_match_msg(ldb, ares->message, req->op.search.tree, req->op.search.base, req->op.search.scope)) { - ldb_debug(ldb, LDB_DEBUG_TRACE, "ldb_map: " - "Skipping record '%s': " - "doesn't match original search\n", - ldb_dn_linearize(ldb, ares->message->dn)); - return LDB_SUCCESS; - } - - /* Limit result to requested attrs */ - if ((req->op.search.attrs) && (!ldb_attr_in_list(req->op.search.attrs, "*"))) { - for (i = 0; i < ares->message->num_elements; ) { - struct ldb_message_element *el = &ares->message->elements[i]; - if (!ldb_attr_in_list(req->op.search.attrs, el->name)) { - ldb_msg_remove_element(ares->message, el); - } else { - i++; - } - } - } - - return req->callback(ldb, req->context, ares); -} - -/* Merge the remote and local parts of a search result. */ -int map_local_merge_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares) -{ - struct map_search_context *sc; - int ret; - - if (context == NULL || ares == NULL) { - ldb_set_errstring(ldb, talloc_asprintf(ldb, "ldb_map: " - "NULL Context or Result in `map_local_merge_callback`")); - return LDB_ERR_OPERATIONS_ERROR; - } - - sc = talloc_get_type(context, struct map_search_context); - - switch (ares->type) { - case LDB_REPLY_ENTRY: - /* We have already found a local record */ - if (sc->local_res) { - ldb_set_errstring(ldb, talloc_asprintf(ldb, "ldb_map: " - "Too many results to base search for local entry")); - talloc_free(ares); - return LDB_ERR_OPERATIONS_ERROR; - } - - /* Store local result */ - sc->local_res = ares; - - /* Merge remote into local message */ - ret = ldb_msg_merge_local(sc->ac->module, ares->message, sc->remote_res->message); - if (ret) { - talloc_free(ares); - return LDB_ERR_OPERATIONS_ERROR; - } - - return map_up_callback(ldb, sc->ac->orig_req, ares); - - case LDB_REPLY_DONE: - /* No local record found, continue with remote record */ - if (sc->local_res == NULL) { - return map_up_callback(ldb, sc->ac->orig_req, sc->remote_res); - } - return LDB_SUCCESS; - - default: - ldb_set_errstring(ldb, talloc_asprintf(ldb, "ldb_map: " - "Unexpected result type in base search for local entry")); - talloc_free(ares); - return LDB_ERR_OPERATIONS_ERROR; - } -} - -/* Search the local part of a remote search result. */ -int map_remote_search_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares) -{ - struct map_context *ac; - struct map_search_context *sc; - struct ldb_request *req; - int ret; - - if (context == NULL || ares == NULL) { - ldb_set_errstring(ldb, talloc_asprintf(ldb, "ldb_map: " - "NULL Context or Result in `map_remote_search_callback`")); - return LDB_ERR_OPERATIONS_ERROR; - } - - ac = talloc_get_type(context, struct map_context); - - /* It's not a record, stop searching */ - if (ares->type != LDB_REPLY_ENTRY) { - return map_up_callback(ldb, ac->orig_req, ares); - } - - /* Map result record into a local message */ - ret = map_reply_remote(ac, ares); - if (ret) { - talloc_free(ares); - return LDB_ERR_OPERATIONS_ERROR; - } - - /* There is no local db, stop searching */ - if (!map_check_local_db(ac->module)) { - return map_up_callback(ldb, ac->orig_req, ares); - } - - /* Prepare local search context */ - sc = map_init_search_context(ac, ares); - if (sc == NULL) { - talloc_free(ares); - return LDB_ERR_OPERATIONS_ERROR; - } - - /* Prepare local search request */ - /* TODO: use GUIDs here instead? */ - - ac->search_reqs = talloc_realloc(ac, ac->search_reqs, struct ldb_request *, ac->num_searches + 2); - if (ac->search_reqs == NULL) { - talloc_free(ares); - return LDB_ERR_OPERATIONS_ERROR; - } - - ac->search_reqs[ac->num_searches] - = req = map_search_base_req(ac, ares->message->dn, - NULL, NULL, sc, map_local_merge_callback); - if (req == NULL) { - talloc_free(sc); - talloc_free(ares); - return LDB_ERR_OPERATIONS_ERROR; - } - ac->num_searches++; - ac->search_reqs[ac->num_searches] = NULL; - - return ldb_next_request(ac->module, req); -} - -/* Search a record. */ -int map_search(struct ldb_module *module, struct ldb_request *req) -{ - struct ldb_handle *h; - struct map_context *ac; - struct ldb_parse_tree *local_tree, *remote_tree; - int ret; - - const char *wildcard[] = { "*", NULL }; - const char * const *attrs; - - /* Do not manipulate our control entries */ - if (ldb_dn_is_special(req->op.search.base)) - return ldb_next_request(module, req); - - /* No mapping requested, skip to next module */ - if ((req->op.search.base) && (!ldb_dn_check_local(module, req->op.search.base))) { - return ldb_next_request(module, req); - } - - /* TODO: How can we be sure about which partition we are - * targetting when there is no search base? */ - - /* Prepare context and handle */ - h = map_init_handle(req, module); - if (h == NULL) { - return LDB_ERR_OPERATIONS_ERROR; - } - ac = talloc_get_type(h->private_data, struct map_context); - - ac->search_reqs = talloc_array(ac, struct ldb_request *, 2); - if (ac->search_reqs == NULL) { - talloc_free(h); - return LDB_ERR_OPERATIONS_ERROR; - } - ac->num_searches = 1; - ac->search_reqs[1] = NULL; - - /* Prepare the remote operation */ - ac->search_reqs[0] = talloc(ac, struct ldb_request); - if (ac->search_reqs[0] == NULL) { - goto oom; - } - - *(ac->search_reqs[0]) = *req; /* copy the request */ - - ac->search_reqs[0]->handle = h; /* return our own handle to deal with this call */ - - ac->search_reqs[0]->context = ac; - ac->search_reqs[0]->callback = map_remote_search_callback; - - /* It is easier to deal with the two different ways of - * expressing the wildcard in the same codepath */ - attrs = req->op.search.attrs; - if (attrs == NULL) { - attrs = wildcard; - } - - /* Split local from remote attrs */ - ret = map_attrs_collect_and_partition(module, ac, - attrs, req->op.search.tree); - if (ret) { - goto failed; - } - - ac->search_reqs[0]->op.search.attrs = ac->remote_attrs; - - /* Split local from remote tree */ - ret = ldb_parse_tree_partition(module, ac, ac->search_reqs[0], - &local_tree, &remote_tree, - req->op.search.tree); - if (ret) { - goto failed; - } - - if (((local_tree != NULL) && (remote_tree != NULL)) && - (!ldb_parse_tree_check_splittable(req->op.search.tree))) { - /* The query can't safely be split, enumerate the remote partition */ - local_tree = NULL; - remote_tree = NULL; - } - - if (local_tree == NULL) { - /* Construct default local parse tree */ - local_tree = talloc_zero(ac, struct ldb_parse_tree); - if (local_tree == NULL) { - map_oom(ac->module); - goto failed; - } - - local_tree->operation = LDB_OP_PRESENT; - local_tree->u.present.attr = talloc_strdup(local_tree, IS_MAPPED); - } - if (remote_tree == NULL) { - /* Construct default remote parse tree */ - remote_tree = ldb_parse_tree(ac->search_reqs[0], NULL); - if (remote_tree == NULL) { - goto failed; - } - } - - ac->local_tree = local_tree; - ac->search_reqs[0]->op.search.tree = remote_tree; - - ldb_set_timeout_from_prev_req(module->ldb, req, ac->search_reqs[0]); - - h->state = LDB_ASYNC_INIT; - h->status = LDB_SUCCESS; - - ac->step = MAP_SEARCH_REMOTE; - - ret = ldb_next_remote_request(module, ac->search_reqs[0]); - if (ret == LDB_SUCCESS) { - req->handle = h; - } - return ret; - -oom: - map_oom(module); -failed: - talloc_free(h); - return LDB_ERR_OPERATIONS_ERROR; -} |