CDRIVER-4812 Single-threaded monitoring commands may include saslSupportedMechs beyond initial handshake

Author: Julia-Garland

src/libmongoc/src/mongoc/mongoc-topology-scanner.c

@@ -158,6 +158,13 @@ _reset_hello (mongoc_topology_scanner_t *ts)
    _add_hello (ts);
 }
 
+void
+_mongoc_topology_scanner_node_parse_sasl_supported_mechs (const bson_t *hello, mongoc_topology_scanner_node_t *node)
+{
+   _mongoc_handshake_parse_sasl_supported_mechs (hello, &node->sasl_supported_mechs);
+   node->negotiated_sasl_supported_mechs = true;
+}
+
 const char *
 _mongoc_topology_scanner_get_speculative_auth_mechanism (const mongoc_uri_t *uri)
 {
@@ -692,7 +699,7 @@ _async_success (mongoc_async_cmd_t *acmd, const bson_t *hello_response, int64_t
    }
 
    if (ts->negotiate_sasl_supported_mechs && !node->negotiated_sasl_supported_mechs) {
-      _mongoc_handshake_parse_sasl_supported_mechs (hello_response, &node->sasl_supported_mechs);
+      _mongoc_topology_scanner_node_parse_sasl_supported_mechs (hello_response, node);
    }
 
    if (ts->speculative_authentication) {