TCPS_CLOSE_WAIT
#define TCP6S_CLOSE_WAIT TCPS_CLOSE_WAIT
case TCPS_CLOSE_WAIT:
tp->t_state > TCPS_CLOSE_WAIT && tlen) {
case TCPS_CLOSE_WAIT:
TCP_STATE_CHANGE(tp, TCPS_CLOSE_WAIT);
case TCPS_CLOSE_WAIT: