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authorAndrew Tridgell <tridge@samba.org>2009-09-20 18:24:23 -0700
committerAndrew Tridgell <tridge@samba.org>2009-09-21 15:26:32 -0700
commit2fda203230b2bdeee61c23def0f4ac1eba807596 (patch)
treeea81ab60d736da3470e0878987b44ba5ea7d0138
parentdd7f94a9e2bcab626b6c0d8eb498259ed132cc9b (diff)
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s4-ldb: add support for extended DNs in the rootDSE
W2K8 join as a DC relies on being able to ask for the sid component of extended DNs from the rootDSE DNs
-rw-r--r--source4/dsdb/samdb/ldb_modules/rootdse.c137
1 files changed, 135 insertions, 2 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/rootdse.c b/source4/dsdb/samdb/ldb_modules/rootdse.c
index 59ea51dbce..171f5d862b 100644
--- a/source4/dsdb/samdb/ldb_modules/rootdse.c
+++ b/source4/dsdb/samdb/ldb_modules/rootdse.c
@@ -51,15 +51,128 @@ static int do_attribute_explicit(const char * const *attrs, const char *name)
/*
+ expand a DN attribute to include extended DN information if requested
+ */
+static int expand_dn_in_message(struct ldb_module *module, struct ldb_message *msg,
+ const char *attrname, struct ldb_control *edn_control,
+ struct ldb_request *req)
+{
+ struct ldb_dn *dn, *dn2;
+ struct ldb_val *v;
+ int ret;
+ struct ldb_request *req2;
+ char *dn_string;
+ const char *no_attrs[] = { NULL };
+ struct ldb_result *res;
+ struct ldb_extended_dn_control *edn;
+ TALLOC_CTX *tmp_ctx = talloc_new(req);
+ struct ldb_context *ldb;
+ int edn_type = 1;
+
+ ldb = ldb_module_get_ctx(module);
+
+ edn = talloc_get_type(edn_control->data, struct ldb_extended_dn_control);
+ if (edn) {
+ edn_type = edn->type;
+ }
+
+ v = discard_const_p(struct ldb_val, ldb_msg_find_ldb_val(msg, attrname));
+ if (v == NULL) {
+ talloc_free(tmp_ctx);
+ return 0;
+ }
+
+ dn_string = talloc_strndup(tmp_ctx, (const char *)v->data, v->length);
+ if (dn_string == NULL) {
+ talloc_free(tmp_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ res = talloc_zero(tmp_ctx, struct ldb_result);
+ if (res == NULL) {
+ talloc_free(tmp_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ dn = ldb_dn_new(tmp_ctx, ldb, dn_string);
+ if (!ldb_dn_validate(dn)) {
+ talloc_free(tmp_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ ret = ldb_build_search_req(&req2, ldb, tmp_ctx,
+ dn,
+ LDB_SCOPE_BASE,
+ NULL,
+ no_attrs,
+ NULL,
+ res, ldb_search_default_callback,
+ req);
+ if (ret != LDB_SUCCESS) {
+ talloc_free(tmp_ctx);
+ return ret;
+ }
+
+
+ ret = ldb_request_add_control(req2,
+ LDB_CONTROL_EXTENDED_DN_OID,
+ edn_control->critical, edn);
+ if (ret != LDB_SUCCESS) {
+ talloc_free(tmp_ctx);
+ return ret;
+ }
+
+ ret = ldb_next_request(module, req2);
+ if (ret == LDB_SUCCESS) {
+ ret = ldb_wait(req2->handle, LDB_WAIT_ALL);
+ }
+ if (ret != LDB_SUCCESS) {
+ talloc_free(tmp_ctx);
+ return ret;
+ }
+
+ if (!res || res->count != 1) {
+ talloc_free(tmp_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ dn2 = res->msgs[0]->dn;
+
+ v->data = (uint8_t *)ldb_dn_get_extended_linearized(msg->elements, dn2, edn_type);
+ v->length = strlen((char *)v->data);
+
+ if (v->data == NULL) {
+ talloc_free(tmp_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ talloc_free(tmp_ctx);
+
+ return 0;
+}
+
+
+/*
add dynamically generated attributes to rootDSE result
*/
-static int rootdse_add_dynamic(struct ldb_module *module, struct ldb_message *msg, const char * const *attrs)
+static int rootdse_add_dynamic(struct ldb_module *module, struct ldb_message *msg,
+ const char * const *attrs, struct ldb_request *req)
{
struct ldb_context *ldb;
struct private_data *priv = talloc_get_type(ldb_module_get_private(module), struct private_data);
char **server_sasl;
const struct dsdb_schema *schema;
int *val;
+ struct ldb_control *edn_control;
+ const char *dn_attrs[] = {
+ "configurationNamingContext",
+ "defaultNamingContext",
+ "dsServiceName",
+ "rootDomainNamingContext",
+ "schemaNamingContext",
+ "serverName",
+ NULL
+ };
ldb = ldb_module_get_ctx(module);
schema = dsdb_get_schema(ldb);
@@ -233,6 +346,26 @@ static int rootdse_add_dynamic(struct ldb_module *module, struct ldb_message *ms
}
}
+ edn_control = ldb_request_get_control(req, LDB_CONTROL_EXTENDED_DN_OID);
+
+ /* if the client sent us the EXTENDED_DN control then we need
+ to expand the DNs to have GUID and SID. W2K8 join relies on
+ this */
+ if (edn_control) {
+ int i, ret;
+ for (i=0; dn_attrs[i]; i++) {
+ if (!do_attribute(attrs, dn_attrs[i])) continue;
+ ret = expand_dn_in_message(module, msg, dn_attrs[i],
+ edn_control, req);
+ if (ret != LDB_SUCCESS) {
+ DEBUG(0,(__location__ ": Failed to expand DN in rootDSE for %s\n",
+ dn_attrs[i]));
+ goto failed;
+ }
+ }
+ }
+
+
/* TODO: lots more dynamic attributes should be added here */
return LDB_SUCCESS;
@@ -301,7 +434,7 @@ static int rootdse_callback(struct ldb_request *req, struct ldb_reply *ares)
/* for each record returned post-process to add any dynamic
attributes that have been asked for */
ret = rootdse_add_dynamic(ac->module, ares->message,
- ac->req->op.search.attrs);
+ ac->req->op.search.attrs, ac->req);
if (ret != LDB_SUCCESS) {
talloc_free(ares);
return ldb_module_done(ac->req, NULL, NULL, ret);