-extern int dccp_feat_signal_nn_change(struct sock *sk, u8 feat, u64 nn_val);
-extern int dccp_feat_finalise_settings(struct dccp_sock *dp);
-extern int dccp_feat_server_ccid_dependencies(struct dccp_request_sock *dreq);
-extern int dccp_feat_insert_opts(struct dccp_sock*, struct dccp_request_sock*,
- struct sk_buff *skb);
-extern int dccp_feat_activate_values(struct sock *sk, struct list_head *fn);
-extern void dccp_feat_list_purge(struct list_head *fn_list);
-