static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct)
{
	struct nlattr *nest_parms;

	if (!(ct->status & IPS_EXPECTED))
		return 0;

	nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER);
	if (!nest_parms)
		goto nla_put_failure;
	if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0)
		goto nla_put_failure;
	nla_nest_end(skb, nest_parms);

	return 0;

nla_put_failure:
	return -1;
}