72 #define TOTAL_HDR_LEN (ETH_HLEN + sizeof(struct ipv6hdr) + sizeof(struct tcphdr))
73 #define MSS (4096 - sizeof(struct tcphdr) - sizeof(struct ipv6hdr))
74 #define MAX_PAYLOAD (IP_MAXPACKET - sizeof(struct tcphdr) - sizeof(struct ipv6hdr))
76 #define MAX_HDR_LEN (ETH_HLEN + sizeof(struct ipv6hdr) + sizeof(struct tcphdr))
103 	const int dport_off = tcp_offset + offsetof(struct tcphdr, dest);  in setup_sock_filter()
186 		ph6.payload_len = htons(sizeof(struct tcphdr) + payload_len);  in tcp_checksum()
195 		ph4.payload_len = htons(sizeof(struct tcphdr) + payload_len);  in tcp_checksum()
200 	return checksum_fold(buf, sizeof(struct tcphdr) + payload_len, sum);  in tcp_checksum()
229 		ip6h->payload_len = htons(sizeof(struct tcphdr) + payload_len);  in fill_networklayer()
243 		iph->tot_len = htons(sizeof(struct tcphdr) +  in fill_networklayer()
257 	struct tcphdr *tcph = buf;  in fill_transportlayer()
302 	struct tcphdr *tcph;  in send_flags()
310 	tcph = (struct tcphdr *)(flag_buf + tcp_offset);  in send_flags()
377 	struct tcphdr *tcphdr = (struct tcphdr *)(buf + tcp_offset);  in recompute_packet()  local
385 	tcphdr->doff = tcphdr->doff + (extlen / 4);  in recompute_packet()
386 	tcphdr->check = 0;  in recompute_packet()
387 	tcphdr->check = tcp_checksum(tcphdr, PAYLOAD_LEN + extlen);  in recompute_packet()
471 	struct tcphdr *tcph = (struct tcphdr *)(buf + tcp_offset);  in send_changed_checksum()
486 	struct tcphdr *tcph = (struct tcphdr *)(buf + tcp_offset);  in send_changed_seq()
569 	       sizeof(struct tcphdr) + PAYLOAD_LEN);  in add_ipv4_ts_option()
709 	       sizeof(struct tcphdr) + PAYLOAD_LEN);  in send_fragment6()
747 	struct tcphdr *tcph;  in check_recv_pkts()
771 		tcph = (struct tcphdr *)(buffer + tcp_offset + ip_ext_len);  in check_recv_pkts()
784 				- sizeof(struct tcphdr) - sizeof(struct iphdr);  in check_recv_pkts()
1079 		total_hdr_len = tcp_offset + sizeof(struct tcphdr);  in main()