LDAP server - add handling for root DSE queries (needed for Radicale 3.5.2+)

app/ldap/routes/rootdse.routes.js

@@ -0,0 +1,37 @@
+const rootdse_routes = {
+
+    prefix: false, // false | string
+
+    /*
+     * The Root DSE lives at the zero-length DN, which sits outside every naming
+     * context by definition, so these routes must not be suffixed with the
+     * server's base DC the way every other router's are. (RFC 4512 §5.1)
+     */
+    absolute: true,
+
+    middleware: [
+        'Logger'
+    ],
+
+    /*
+     * No BindUser here on purpose. RFC 4512 §5.1 expects the Root DSE to be
+     * readable before the client has bound, and ldap3 reads it as part of
+     * connecting. Nothing it exposes is sensitive.
+     */
+    search: {
+        '': ['ldap_controller::RootDSE.search_root_dse'],
+    },
+
+    bind: {},
+
+    add: {},
+
+    del: {},
+
+    modify: {},
+
+    compare: {},
+
+}
+
+module.exports = exports = rootdse_routes