+static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb)
+{
+ struct tcphdr *th = tcp_hdr(skb);
+ u32 seq = 0, ack_seq = 0;
+ struct tcp_md5sig_key *key = NULL;
+
+ if (th->rst)
+ return;
+
+ if (!ipv6_unicast_destination(skb))
+ return;
+
+#ifdef CONFIG_TCP_MD5SIG
+ if (sk)
+ key = tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr);
+#endif
+
+ if (th->ack)
+ seq = ntohl(th->ack_seq);
+ else
+ ack_seq = ntohl(th->seq) + th->syn + th->fin + skb->len -
+ (th->doff << 2);
+
+ tcp_v6_send_response(skb, seq, ack_seq, 0, 0, key, 1);
+}
+
+static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 ts,
+ struct tcp_md5sig_key *key)
+{
+ tcp_v6_send_response(skb, seq, ack, win, ts, key, 0);
+}
+