BPF_IDLE
d->bd_state = BPF_IDLE;
if (d->bd_rtout > 0 && d->bd_state == BPF_IDLE) {
} else if (d->bd_rtout > 0 && d->bd_state == BPF_IDLE) {
d->bd_state = BPF_IDLE;
d->bd_state = BPF_IDLE;
d->bd_state = BPF_IDLE;