from tcl_server.c:268
static const struct service_driver tcl_service_driver = {
.name = "tcl",
.new_connection_during_keep_alive_handler = NULL,
.new_connection_handler = tcl_new_connection,
.input_handler = tcl_input,
.connection_closed_handler = tcl_closed,
.keep_client_alive_handler = NULL,
};