TLS_ST_CW_KEY_UPDATE
case TLS_ST_CW_KEY_UPDATE:
case TLS_ST_CW_KEY_UPDATE:
case TLS_ST_CW_KEY_UPDATE:
case TLS_ST_CW_KEY_UPDATE:
st->hand_state = TLS_ST_CW_KEY_UPDATE;
case TLS_ST_CW_KEY_UPDATE:
&& s->statem.hand_state != TLS_ST_CW_KEY_UPDATE