tcp_respond
(void)tcp_respond(0, m, m, th, th->th_seq + tlen, th->th_ack, TH_ACK);
tcp_respond(0, m, m, th, (tcp_seq)0, th->th_ack, TH_RST);
(void)tcp_respond(0, m, m, th, th->th_seq + tlen, (tcp_seq)0,
tcp_respond(tp, m, m, th, (tcp_seq)0, th->th_ack - 1,
(void)tcp_respond(tp, m, m, th, (tcp_seq)0, th->th_ack, TH_RST);
(void)tcp_respond(tp, m, m, th, th->th_seq + tlen, (tcp_seq)0,
(void)tcp_respond(NULL, m, m, th, (tcp_seq)0, th->th_ack, TH_RST);
(void)tcp_respond(tp, tp->t_template,
int tcp_respond(struct tcpcb *, struct mbuf *, struct mbuf *,