69 #define TOTAL_HDR_LEN (ETH_HLEN + sizeof(struct ipv6hdr) + sizeof(struct tcphdr))
70 #define MSS (4096 - sizeof(struct tcphdr) - sizeof(struct ipv6hdr))
71 #define MAX_PAYLOAD (IP_MAXPACKET - sizeof(struct tcphdr) - sizeof(struct ipv6hdr))
73 #define MAX_HDR_LEN (ETH_HLEN + sizeof(struct ipv6hdr) + sizeof(struct tcphdr))
111 	const int dport_off = tcp_offset + offsetof(struct tcphdr, dest);  in setup_sock_filter()
213 		ph6.payload_len = htons(sizeof(struct tcphdr) + payload_len);  in tcp_checksum()
222 		ph4.payload_len = htons(sizeof(struct tcphdr) + payload_len);  in tcp_checksum()
227 	return checksum_fold(buf, sizeof(struct tcphdr) + payload_len, sum);  in tcp_checksum()
256 		ip6h->payload_len = htons(sizeof(struct tcphdr) + payload_len);  in fill_networklayer()
270 		iph->tot_len = htons(sizeof(struct tcphdr) +  in fill_networklayer()
284 	struct tcphdr *tcph = buf;  in fill_transportlayer()
329 	struct tcphdr *tcph;  in send_flags()
337 	tcph = (struct tcphdr *)(flag_buf + tcp_offset);  in send_flags()
404 	struct tcphdr *tcphdr = (struct tcphdr *)(buf + tcp_offset);  in recompute_packet()  local
412 	tcphdr->doff = tcphdr->doff + (extlen / 4);  in recompute_packet()
413 	tcphdr->check = 0;  in recompute_packet()
414 	tcphdr->check = tcp_checksum(tcphdr, PAYLOAD_LEN + extlen);  in recompute_packet()
498 	struct tcphdr *tcph = (struct tcphdr *)(buf + tcp_offset);  in send_changed_checksum()
513 	struct tcphdr *tcph = (struct tcphdr *)(buf + tcp_offset);  in send_changed_seq()
596 	       sizeof(struct tcphdr) + PAYLOAD_LEN);  in add_ipv4_ts_option()
618 		sizeof(struct tcphdr) + PAYLOAD_LEN);  in add_ipv6_exthdr()
876 	       sizeof(struct tcphdr) + PAYLOAD_LEN);  in send_fragment6()
914 	struct tcphdr *tcph;  in check_recv_pkts()
939 		tcph = (struct tcphdr *)(buffer + tcp_offset + ip_ext_len);  in check_recv_pkts()
952 				- sizeof(struct tcphdr) - sizeof(struct iphdr);  in check_recv_pkts()
1310 		total_hdr_len = tcp_offset + sizeof(struct tcphdr);  in main()