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|
/*
Unix SMB/CIFS implementation.
rootDSE ldb module
Copyright (C) Andrew Tridgell 2005
Copyright (C) Simo Sorce 2005
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 "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_errors.h"
#include "lib/ldb/include/ldb_private.h"
#include "system/time.h"
#include "dsdb/samdb/samdb.h"
#include "version.h"
struct private_data {
int num_controls;
char **controls;
int num_partitions;
struct ldb_dn **partitions;
};
/*
return 1 if a specific attribute has been requested
*/
static int do_attribute(const char * const *attrs, const char *name)
{
return attrs == NULL ||
ldb_attr_in_list(attrs, name) ||
ldb_attr_in_list(attrs, "*");
}
static int do_attribute_explicit(const char * const *attrs, const char *name)
{
return attrs != NULL && ldb_attr_in_list(attrs, name);
}
/*
add dynamically generated attributes to rootDSE result
*/
static int rootdse_add_dynamic(struct ldb_module *module, struct ldb_message *msg, const char * const *attrs)
{
struct private_data *priv = talloc_get_type(module->private_data, struct private_data);
char **server_sasl;
const struct dsdb_schema *schema;
schema = dsdb_get_schema(module->ldb);
msg->dn = ldb_dn_new(msg, module->ldb, NULL);
/* don't return the distinduishedName, cn and name attributes */
ldb_msg_remove_attr(msg, "distinguishedName");
ldb_msg_remove_attr(msg, "cn");
ldb_msg_remove_attr(msg, "name");
if (do_attribute(attrs, "currentTime")) {
if (ldb_msg_add_steal_string(msg, "currentTime",
ldb_timestring(msg, time(NULL))) != 0) {
goto failed;
}
}
if (do_attribute(attrs, "supportedControl")) {
int i;
for (i = 0; i < priv->num_controls; i++) {
char *control = talloc_strdup(msg, priv->controls[i]);
if (!control) {
goto failed;
}
if (ldb_msg_add_steal_string(msg, "supportedControl",
control) != 0) {
goto failed;
}
}
}
if (do_attribute(attrs, "namingContexts")) {
int i;
for (i = 0; i < priv->num_partitions; i++) {
struct ldb_dn *dn = priv->partitions[i];
if (ldb_msg_add_steal_string(msg, "namingContexts",
ldb_dn_alloc_linearized(msg, dn)) != 0) {
goto failed;
}
}
}
server_sasl = talloc_get_type(ldb_get_opaque(module->ldb, "supportedSASLMechanims"),
char *);
if (server_sasl && do_attribute(attrs, "supportedSASLMechanisms")) {
int i;
for (i = 0; server_sasl && server_sasl[i]; i++) {
char *sasl_name = talloc_strdup(msg, server_sasl[i]);
if (!sasl_name) {
goto failed;
}
if (ldb_msg_add_steal_string(msg, "supportedSASLMechanisms",
sasl_name) != 0) {
goto failed;
}
}
}
if (do_attribute(attrs, "highestCommittedUSN")) {
uint64_t seq_num;
int ret = ldb_sequence_number(module->ldb, LDB_SEQ_HIGHEST_SEQ, &seq_num);
if (ret == LDB_SUCCESS) {
if (ldb_msg_add_fmt(msg, "highestCommittedUSN",
"%llu", (unsigned long long)seq_num) != 0) {
goto failed;
}
}
}
if (schema && do_attribute_explicit(attrs, "dsSchemaAttrCount")) {
struct dsdb_attribute *cur;
uint32_t n = 0;
for (cur = schema->attributes; cur; cur = cur->next) {
n++;
}
if (ldb_msg_add_fmt(msg, "dsSchemaAttrCount",
"%u", n) != 0) {
goto failed;
}
}
if (schema && do_attribute_explicit(attrs, "dsSchemaClassCount")) {
struct dsdb_class *cur;
uint32_t n = 0;
for (cur = schema->classes; cur; cur = cur->next) {
n++;
}
if (ldb_msg_add_fmt(msg, "dsSchemaClassCount",
"%u", n) != 0) {
goto failed;
}
}
if (schema && do_attribute_explicit(attrs, "dsSchemaPrefixCount")) {
if (ldb_msg_add_fmt(msg, "dsSchemaPrefixCount",
"%u", schema->num_prefixes) != 0) {
goto failed;
}
}
if (do_attribute_explicit(attrs, "validFSMOs")) {
const struct dsdb_naming_fsmo *naming_fsmo;
const struct dsdb_pdc_fsmo *pdc_fsmo;
const char *dn_str;
if (schema && schema->fsmo.we_are_master) {
dn_str = ldb_dn_get_linearized(samdb_schema_dn(module->ldb));
if (dn_str && dn_str[0]) {
if (ldb_msg_add_fmt(msg, "validFSMOs", "%s", dn_str) != 0) {
goto failed;
}
}
}
naming_fsmo = talloc_get_type(ldb_get_opaque(module->ldb, "dsdb_naming_fsmo"),
struct dsdb_naming_fsmo);
if (naming_fsmo && naming_fsmo->we_are_master) {
dn_str = ldb_dn_get_linearized(samdb_partitions_dn(module->ldb, msg));
if (dn_str && dn_str[0]) {
if (ldb_msg_add_fmt(msg, "validFSMOs", "%s", dn_str) != 0) {
goto failed;
}
}
}
pdc_fsmo = talloc_get_type(ldb_get_opaque(module->ldb, "dsdb_pdc_fsmo"),
struct dsdb_pdc_fsmo);
if (pdc_fsmo && pdc_fsmo->we_are_master) {
dn_str = ldb_dn_get_linearized(samdb_base_dn(module->ldb));
if (dn_str && dn_str[0]) {
if (ldb_msg_add_fmt(msg, "validFSMOs", "%s", dn_str) != 0) {
goto failed;
}
}
}
}
if (schema && do_attribute_explicit(attrs, "vendorVersion")) {
if (ldb_msg_add_fmt(msg, "vendorVersion",
"%s", SAMBA_VERSION_STRING) != 0) {
goto failed;
}
}
/* TODO: lots more dynamic attributes should be added here */
return LDB_SUCCESS;
failed:
return LDB_ERR_OPERATIONS_ERROR;
}
/*
handle search requests
*/
struct rootdse_context {
struct ldb_module *module;
void *up_context;
int (*up_callback)(struct ldb_context *, void *, struct ldb_reply *);
const char * const * attrs;
};
static int rootdse_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares)
{
struct rootdse_context *ac;
ac = talloc_get_type(context, struct rootdse_context);
if (ares->type == LDB_REPLY_ENTRY) {
/*
* if the client explicit asks for the 'netlogon' attribute
* the reply_entry needs to be skipped
*/
if (ac->attrs && ldb_attr_in_list(ac->attrs, "netlogon")) {
talloc_free(ares);
return LDB_SUCCESS;
}
/* for each record returned post-process to add any dynamic
attributes that have been asked for */
if (rootdse_add_dynamic(ac->module, ares->message, ac->attrs) != LDB_SUCCESS) {
goto error;
}
}
return ac->up_callback(ldb, ac->up_context, ares);
error:
talloc_free(ares);
return LDB_ERR_OPERATIONS_ERROR;
}
static int rootdse_search(struct ldb_module *module, struct ldb_request *req)
{
struct rootdse_context *ac;
struct ldb_request *down_req;
int ret;
/* see if its for the rootDSE */
if (req->op.search.scope != LDB_SCOPE_BASE ||
( ! ldb_dn_is_null(req->op.search.base))) {
return ldb_next_request(module, req);
}
ac = talloc(req, struct rootdse_context);
if (ac == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
ac->module = module;
ac->up_context = req->context;
ac->up_callback = req->callback;
ac->attrs = req->op.search.attrs;
down_req = talloc_zero(req, struct ldb_request);
if (down_req == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
down_req->operation = req->operation;
/* in our db we store the rootDSE with a DN of @ROOTDSE */
down_req->op.search.base = ldb_dn_new(down_req, module->ldb, "@ROOTDSE");
down_req->op.search.scope = LDB_SCOPE_BASE;
down_req->op.search.tree = ldb_parse_tree(down_req, NULL);
if (down_req->op.search.base == NULL || down_req->op.search.tree == NULL) {
ldb_oom(module->ldb);
talloc_free(down_req);
return LDB_ERR_OPERATIONS_ERROR;
}
down_req->op.search.attrs = req->op.search.attrs;
down_req->controls = req->controls;
down_req->context = ac;
down_req->callback = rootdse_callback;
ldb_set_timeout_from_prev_req(module->ldb, req, down_req);
/* perform the search */
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 rootdse_register_control(struct ldb_module *module, struct ldb_request *req)
{
struct private_data *priv = talloc_get_type(module->private_data, struct private_data);
char **list;
list = talloc_realloc(priv, priv->controls, char *, priv->num_controls + 1);
if (!list) {
return LDB_ERR_OPERATIONS_ERROR;
}
list[priv->num_controls] = talloc_strdup(list, req->op.reg_control.oid);
if (!list[priv->num_controls]) {
return LDB_ERR_OPERATIONS_ERROR;
}
priv->num_controls += 1;
priv->controls = list;
return LDB_SUCCESS;
}
static int rootdse_register_partition(struct ldb_module *module, struct ldb_request *req)
{
struct private_data *priv = talloc_get_type(module->private_data, struct private_data);
struct ldb_dn **list;
list = talloc_realloc(priv, priv->partitions, struct ldb_dn *, priv->num_partitions + 1);
if (!list) {
return LDB_ERR_OPERATIONS_ERROR;
}
list[priv->num_partitions] = ldb_dn_copy(list, req->op.reg_partition.dn);
if (!list[priv->num_partitions]) {
return LDB_ERR_OPERATIONS_ERROR;
}
priv->num_partitions += 1;
priv->partitions = list;
return LDB_SUCCESS;
}
static int rootdse_request(struct ldb_module *module, struct ldb_request *req)
{
switch (req->operation) {
case LDB_REQ_REGISTER_CONTROL:
return rootdse_register_control(module, req);
case LDB_REQ_REGISTER_PARTITION:
return rootdse_register_partition(module, req);
default:
break;
}
return ldb_next_request(module, req);
}
static int rootdse_init(struct ldb_module *module)
{
struct private_data *data;
data = talloc(module, struct private_data);
if (data == NULL) {
return -1;
}
data->num_controls = 0;
data->controls = NULL;
data->num_partitions = 0;
data->partitions = NULL;
module->private_data = data;
ldb_set_default_dns(module->ldb);
return ldb_next_init(module);
}
static int rootdse_modify(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_result *ext_res;
int ret;
struct ldb_dn *schema_dn;
struct ldb_message_element *schemaUpdateNowAttr;
/*
If dn is not "" we should let it pass through
*/
if (!ldb_dn_is_null(req->op.mod.message->dn)) {
return ldb_next_request(module, req);
}
/*
dn is empty so check for schemaUpdateNow attribute
"The type of modification and values specified in the LDAP modify operation do not matter." MSDN
*/
schemaUpdateNowAttr = ldb_msg_find_element(req->op.mod.message, "schemaUpdateNow");
if (!schemaUpdateNowAttr) {
return LDB_ERR_OPERATIONS_ERROR;
}
schema_dn = samdb_schema_dn(module->ldb);
if (!schema_dn) {
ldb_reset_err_string(module->ldb);
ldb_debug(module->ldb, LDB_DEBUG_WARNING,
"rootdse_modify: no schema dn present: (skip ldb_extended call)\n");
return ldb_next_request(module, req);
}
ret = ldb_extended(module->ldb, DSDB_EXTENDED_SCHEMA_UPDATE_NOW_OID, schema_dn, &ext_res);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
talloc_free(ext_res);
return ret;
}
_PUBLIC_ const struct ldb_module_ops ldb_rootdse_module_ops = {
.name = "rootdse",
.init_context = rootdse_init,
.search = rootdse_search,
.request = rootdse_request,
.modify = rootdse_modify
};
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