TIMEOUT_MILLIS
client_fd = connect_to_fd(listen_fd, TIMEOUT_MILLIS);
if (!ASSERT_OK(settimeo(accept_fd, TIMEOUT_MILLIS), "settimeo"))
cli_fd = connect_to_fd(srv_fd, TIMEOUT_MILLIS);
client_fd = connect_to_fd(listen_fd, TIMEOUT_MILLIS);