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))
104 	const int dport_off = tcp_offset + offsetof(struct tcphdr, dest);  in setup_sock_filter()
187 		ph6.payload_len = htons(sizeof(struct tcphdr) + payload_len);  in tcp_checksum()
196 		ph4.payload_len = htons(sizeof(struct tcphdr) + payload_len);  in tcp_checksum()
201 	return checksum_fold(buf, sizeof(struct tcphdr) + payload_len, sum);  in tcp_checksum()
230 		ip6h->payload_len = htons(sizeof(struct tcphdr) + payload_len);  in fill_networklayer()
244 		iph->tot_len = htons(sizeof(struct tcphdr) +  in fill_networklayer()
258 	struct tcphdr *tcph = buf;  in fill_transportlayer()
303 	struct tcphdr *tcph;  in send_flags()
311 	tcph = (struct tcphdr *)(flag_buf + tcp_offset);  in send_flags()
378 	struct tcphdr *tcphdr = (struct tcphdr *)(buf + tcp_offset);  in recompute_packet()  local
386 	tcphdr->doff = tcphdr->doff + (extlen / 4);  in recompute_packet()
387 	tcphdr->check = 0;  in recompute_packet()
388 	tcphdr->check = tcp_checksum(tcphdr, PAYLOAD_LEN + extlen);  in recompute_packet()
472 	struct tcphdr *tcph = (struct tcphdr *)(buf + tcp_offset);  in send_changed_checksum()
487 	struct tcphdr *tcph = (struct tcphdr *)(buf + tcp_offset);  in send_changed_seq()
570 	       sizeof(struct tcphdr) + PAYLOAD_LEN);  in add_ipv4_ts_option()
710 	       sizeof(struct tcphdr) + PAYLOAD_LEN);  in send_fragment6()
748 	struct tcphdr *tcph;  in check_recv_pkts()
772 		tcph = (struct tcphdr *)(buffer + tcp_offset + ip_ext_len);  in check_recv_pkts()
785 				- sizeof(struct tcphdr) - sizeof(struct iphdr);  in check_recv_pkts()
1088 		total_hdr_len = tcp_offset + sizeof(struct tcphdr);  in main()