372 	struct tcphdr *tcp;  member
398 		hdr->tcp = (void *)hdr->ipv4 + hdr->ipv4->ihl * 4;  in tcp_dissect()
415 		hdr->tcp = (void *)hdr->ipv6 + sizeof(*hdr->ipv6);  in tcp_dissect()
422 	if (hdr->tcp + 1 > data_end)  in tcp_dissect()
424 	hdr->tcp_len = hdr->tcp->doff * 4;  in tcp_dissect()
425 	if (hdr->tcp_len < sizeof(*hdr->tcp))  in tcp_dissect()
450 		tup.ipv4.sport = hdr->tcp->source;  in tcp_lookup()
451 		tup.ipv4.dport = hdr->tcp->dest;  in tcp_lookup()
456 		tup.ipv6.sport = hdr->tcp->source;  in tcp_lookup()
457 		tup.ipv6.dport = hdr->tcp->dest;  in tcp_lookup()
553 	tcp_gen_synack(hdr->tcp, cookie, tsopt, mss, wscale);  in tcpv4_gen_synack()
555 	hdr->tcp_len = hdr->tcp->doff * 4;  in tcpv4_gen_synack()
574 	tcp_gen_synack(hdr->tcp, cookie, tsopt, mss, wscale);  in tcpv6_gen_synack()
576 	hdr->tcp_len = hdr->tcp->doff * 4;  in tcpv6_gen_synack()
611 	if (hdr->tcp->fin || hdr->tcp->rst)  in syncookie_handle_syn()
617 	if (!check_port_allowed(bpf_ntohs(hdr->tcp->dest)))  in syncookie_handle_syn()
628 		value = bpf_csum_diff(0, 0, (void *)hdr->tcp, hdr->tcp_len, 0);  in syncookie_handle_syn()
637 		value = bpf_tcp_raw_gen_syncookie_ipv4(hdr->ipv4, hdr->tcp,  in syncookie_handle_syn()
641 		value = bpf_csum_diff(0, 0, (void *)hdr->tcp, hdr->tcp_len, 0);  in syncookie_handle_syn()
650 		value = bpf_tcp_raw_gen_syncookie_ipv6(hdr->ipv6, hdr->tcp,  in syncookie_handle_syn()
660 	if (tscookie_init((void *)hdr->tcp, hdr->tcp_len,  in syncookie_handle_syn()
676 			__builtin_memmove(new_tcp_header, hdr->tcp, sizeof(*hdr->tcp));  in syncookie_handle_syn()
677 			hdr->tcp = new_tcp_header;  in syncookie_handle_syn()
690 	hdr->tcp->check = 0;  in syncookie_handle_syn()
691 	value = bpf_csum_diff(0, 0, (void *)hdr->tcp, hdr->tcp_len, 0);  in syncookie_handle_syn()
695 		hdr->tcp->check = csum_tcpudp_magic(hdr->ipv4->saddr,  in syncookie_handle_syn()
707 		hdr->tcp->check = csum_ipv6_magic(&hdr->ipv6->saddr,  in syncookie_handle_syn()
718 	new_pkt_size = sizeof(*hdr->eth) + ip_len + hdr->tcp->doff * 4;  in syncookie_handle_syn()
736 	if (hdr->tcp->rst)  in syncookie_handle_ack()
740 		err = bpf_tcp_raw_check_syncookie_ipv4(hdr->ipv4, hdr->tcp);  in syncookie_handle_ack()
742 		err = bpf_tcp_raw_check_syncookie_ipv6(hdr->ipv6, hdr->tcp);  in syncookie_handle_ack()
766 	if ((hdr->tcp->syn ^ hdr->tcp->ack) != 1)  in syncookie_part1()
799 		hdr->tcp = (void *)hdr->ipv4 + hdr->ipv4->ihl * 4;  in syncookie_part2()
803 		hdr->tcp = (void *)hdr->ipv6 + sizeof(*hdr->ipv6);  in syncookie_part2()
808 	if ((void *)hdr->tcp + TCP_MAXLEN > data_end)  in syncookie_part2()
814 	hdr->tcp_len = hdr->tcp->doff * 4;  in syncookie_part2()
815 	if (hdr->tcp_len < sizeof(*hdr->tcp))  in syncookie_part2()
818 	return hdr->tcp->syn ? syncookie_handle_syn(hdr, ctx, data, data_end, xdp) :  in syncookie_part2()