VDC_LDC_OPEN
if (srvr->state & VDC_LDC_OPEN) {
srvr->state &= ~(VDC_LDC_INIT | VDC_LDC_CB | VDC_LDC_OPEN);
srvr->state |= VDC_LDC_OPEN;
#define VDC_LDC (VDC_LDC_INIT | VDC_LDC_CB | VDC_LDC_OPEN)