KSF_EOFSEEN
if (so->so_state & SS_CANTRCVMORE && !(priv->flags & KSF_EOFSEEN)) {
priv->flags |= KSF_EOFSEEN;
if (so->so_state & SS_CANTRCVMORE && !(priv->flags & KSF_EOFSEEN)) {
priv->flags |= KSF_EOFSEEN;