netfilter: ctnetlink: dump expectation helper name

Signed-off-by: Patrick McHardy <kaber@trash.net>

net/netfilter/nf_conntrack_netlink.c

@@ -1512,6 +1512,7 @@ ctnetlink_exp_dump_expect(struct sk_buff *skb,
 			  const struct nf_conntrack_expect *exp)
 {
 	struct nf_conn *master = exp->master;
+	struct nf_conntrack_helper *helper;
 	long timeout = (exp->timeout.expires - jiffies) / HZ;
 
 	if (timeout < 0)
@@ -1528,6 +1529,9 @@ ctnetlink_exp_dump_expect(struct sk_buff *skb,
 
 	NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout));
 	NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp));
+	helper = rcu_dereference(nfct_help(master)->helper);
+	if (helper)
+		NLA_PUT_STRING(skb, CTA_EXPECT_HELP_NAME, helper->name);
 
 	return 0;