pru_flowid
so->so_splicequeue = net_tq(pru_flowid(so));
.pru_flowid = in_flowid,
.pru_flowid = in_flowid,
.pru_flowid = in_flowid,
.pru_flowid = in_flowid,
return (*so->so_proto->pr_usrreqs->pru_flowid)(so);
int (*pru_flowid)(struct socket *);