97 				__be32 daddr, __be32 saddr, const struct tcphdr *th);
494 	struct tcphdr *th = (struct tcphdr *)(skb->data + (iph->ihl << 2));  in tcp_v4_err()  local
504 	sk = __inet_lookup_established(net, iph->daddr, th->dest, iph->saddr,  in tcp_v4_err()
505 				       ntohs(th->source), inet_iif(skb), 0);  in tcp_v4_err()
516 	seq = ntohl(th->seq);  in tcp_v4_err()
619 		ip_icmp_error(sk, skb, err, th->dest, info, (u8 *)th);  in tcp_v4_err()
720 	const struct tcphdr *th = tcp_hdr(skb);  in tcp_v4_send_reset()  local
722 		struct tcphdr th;  in tcp_v4_send_reset()  member
739 	if (th->rst)  in tcp_v4_send_reset()
750 	rep.th.dest   = th->source;  in tcp_v4_send_reset()
751 	rep.th.source = th->dest;  in tcp_v4_send_reset()
752 	rep.th.doff   = sizeof(struct tcphdr) / 4;  in tcp_v4_send_reset()
753 	rep.th.rst    = 1;  in tcp_v4_send_reset()
755 	if (th->ack) {  in tcp_v4_send_reset()
756 		rep.th.seq = th->ack_seq;  in tcp_v4_send_reset()
758 		rep.th.ack = 1;  in tcp_v4_send_reset()
759 		rep.th.ack_seq = htonl(ntohl(th->seq) + th->syn + th->fin +  in tcp_v4_send_reset()
760 				       skb->len - (th->doff << 2));  in tcp_v4_send_reset()
765 	arg.iov[0].iov_len  = sizeof(rep.th);  in tcp_v4_send_reset()
773 	if (aoh && tcp_v4_ao_sign_reset(sk, skb, aoh, &arg, &rep.th, rep.opt))  in tcp_v4_send_reset()
802 					     th->source, ip_hdr(skb)->daddr,  in tcp_v4_send_reset()
803 					     ntohs(th->source), dif, sdif);  in tcp_v4_send_reset()
829 		rep.th.doff = arg.iov[0].iov_len / 4;  in tcp_v4_send_reset()
833 				     ip_hdr(skb)->daddr, &rep.th);  in tcp_v4_send_reset()
843 			rep.th.doff = arg.iov[0].iov_len / 4;  in tcp_v4_send_reset()
915 	const struct tcphdr *th = tcp_hdr(skb);  in tcp_v4_send_ack()  local
917 		struct tcphdr th;  in tcp_v4_send_ack()  member
925 	memset(&rep.th, 0, sizeof(struct tcphdr));  in tcp_v4_send_ack()
929 	arg.iov[0].iov_len  = sizeof(rep.th);  in tcp_v4_send_ack()
940 	rep.th.dest    = th->source;  in tcp_v4_send_ack()
941 	rep.th.source  = th->dest;  in tcp_v4_send_ack()
942 	rep.th.doff    = arg.iov[0].iov_len / 4;  in tcp_v4_send_ack()
943 	rep.th.seq     = htonl(seq);  in tcp_v4_send_ack()
944 	rep.th.ack_seq = htonl(ack);  in tcp_v4_send_ack()
945 	rep.th.ack     = 1;  in tcp_v4_send_ack()
946 	rep.th.window  = htons(win);  in tcp_v4_send_ack()
957 		rep.th.doff = arg.iov[0].iov_len/4;  in tcp_v4_send_ack()
961 				    ip_hdr(skb)->daddr, &rep.th);  in tcp_v4_send_ack()
973 		rep.th.doff = arg.iov[0].iov_len / 4;  in tcp_v4_send_ack()
979 				&rep.th, key->sne);  in tcp_v4_send_ack()
1544 				    const struct tcphdr *th, int nbytes)  argument
1556 	h.tcp = *th;
1563 		    __be32 daddr, __be32 saddr, const struct tcphdr *th)  argument
1568 	tcp_v4_md5_hash_headers(&ctx, daddr, saddr, th, th->doff << 2);
1577 	const struct tcphdr *th = tcp_hdr(skb);  local
1591 	tcp_v4_md5_hash_headers(&ctx, daddr, saddr, th, skb->len);
1592 	tcp_md5_hash_skb_data(&ctx, skb, th->doff << 2);
1794 	const struct tcphdr *th = tcp_hdr(skb);  local
1796 	if (!th->syn)
1803 			 struct tcphdr *th, u32 *cookie)  argument
1808 				    &tcp_request_sock_ipv4_ops, sk, th);
1810 		*cookie = __cookie_v4_init_sequence(iph, th, &mss);
1907 	const struct tcphdr *th;  local
1940 	th = (const struct tcphdr *)skb->data;
1941 	hdrlen = th->doff * 4;
1958 	    thtail->doff != th->doff ||
1959 	    memcmp(thtail + 1, th + 1, hdrlen - sizeof(*th)) ||
1979 			thtail->window = th->window;
1990 		thtail->fin |= th->fin;
2048 			   const struct tcphdr *th)  argument
2057 	TCP_SKB_CB(skb)->seq = ntohl(th->seq);
2058 	TCP_SKB_CB(skb)->end_seq = (TCP_SKB_CB(skb)->seq + th->syn + th->fin +
2059 				    skb->len - th->doff * 4);
2060 	TCP_SKB_CB(skb)->ack_seq = ntohl(th->ack_seq);
2061 	TCP_SKB_CB(skb)->tcp_flags = tcp_flags_ntohs(th);
2080 	const struct tcphdr *th;  local
2096 	th = (const struct tcphdr *)skb->data;
2098 	if (unlikely(th->doff < sizeof(struct tcphdr) / 4)) {
2102 	if (!pskb_may_pull(skb, th->doff * 4))
2107 	 * provided case of th->doff==0 is eliminated.
2113 	th = (const struct tcphdr *)skb->data;
2116 	sk = __inet_lookup_skb(skb, __tcp_hdrlen(th), th->source,
2117 			       th->dest, sdif, &refcounted);
2165 			th = (const struct tcphdr *)skb->data;
2167 			tcp_v4_fill_cb(skb, iph, th);
2229 	th = (const struct tcphdr *)skb->data;
2231 	tcp_v4_fill_cb(skb, iph, th);
2265 	tcp_v4_fill_cb(skb, iph, th);
2297 	tcp_v4_fill_cb(skb, iph, th);
2304 	tw_status = tcp_timewait_state_process(inet_twsk(sk), skb, th, &isn,
2308 		struct sock *sk2 = inet_lookup_listener(net, skb, __tcp_hdrlen(th),
2309 							iph->saddr, th->source,
2310 							iph->daddr, th->dest,