ADV_IDLE
idle_pool = (mcnt - max_active) * ADV_IDLE;
if (m->window >= ADV_IDLE)
if (state == MBR_JOINED && adv == ADV_IDLE)
if (state == MBR_PENDING && adv == ADV_IDLE)
if (m->advertised > ADV_IDLE)
if (m->advertised < ADV_IDLE) {
adv = ADV_IDLE - m->advertised;
m->window = ADV_IDLE;
m->advertised = ADV_IDLE + in_flight;
m->advertised = ADV_IDLE;