VS_ENG_INUSE
case VS_ENG_INUSE:
if (cxn->vsc_state == VS_ENG_INUSE) {
cxn->vsc_state = VS_ENG_INUSE;
case VS_ENG_INUSE:
cxn->vsc_state = VS_ENG_INUSE;
case VS_ENG_INUSE:
case VS_ENG_INUSE: