-extern int nf_ct_get_tuplepr(const struct sk_buff *skb,
- unsigned int nhoff,
- u_int16_t l3num,
- struct nf_conntrack_tuple *tuple);
-extern int nf_ct_invert_tuplepr(struct nf_conntrack_tuple *inverse,
- const struct nf_conntrack_tuple *orig);
+extern bool nf_ct_get_tuplepr(const struct sk_buff *skb,
+ unsigned int nhoff, u_int16_t l3num,
+ struct nf_conntrack_tuple *tuple);
+extern bool nf_ct_invert_tuplepr(struct nf_conntrack_tuple *inverse,
+ const struct nf_conntrack_tuple *orig);