extern void dccp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb);
-extern int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb);
+extern int dccp_retransmit_skb(struct sock *sk);
extern void dccp_send_ack(struct sock *sk);
extern void dccp_reqsk_send_ack(struct sk_buff *sk, struct request_sock *rsk);