TCP_TIME_WAIT_DELAY
now % MSEC_TO_TICK(TCP_TIME_WAIT_DELAY);
schedule += MSEC_TO_TICK(TCP_TIME_WAIT_DELAY);
schedule -= schedule % MSEC_TO_TICK(TCP_TIME_WAIT_DELAY);
(((t) / MSEC_TO_TICK(TCP_TIME_WAIT_DELAY)) % TCP_TIME_WAIT_BUCKETS)
sched_new = sched_cur + MSEC_TO_TICK(TCP_TIME_WAIT_DELAY);
sched_new += MSEC_TO_TICK(TCP_TIME_WAIT_DELAY);
#define TCP_TIME_WAIT_BUCKETS ((TCP_TIME_WAIT_MAX / TCP_TIME_WAIT_DELAY) + 1)