tcp_v4_send_check
void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb);
.send_check = tcp_v4_send_check,
EXPORT_IPV6_MOD(tcp_v4_send_check);
INDIRECT_CALLABLE_DECLARE(void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb));
tcp_v6_send_check, tcp_v4_send_check,
.send_check = tcp_v4_send_check,