118 		next_off = offsetof(struct iphdr, protocol);  in setup_sock_filter()
250 	struct iphdr *iph = buf;  in fill_networklayer()
271 				payload_len + sizeof(struct iphdr));  in fill_networklayer()
277 		iph->check = checksum_fold(buf, sizeof(struct iphdr), 0);  in fill_networklayer()
406 	struct iphdr *iph = (struct iphdr *)(buf + ETH_HLEN);  in recompute_packet()
418 		iph->check = checksum_fold(iph, sizeof(struct iphdr), 0);  in recompute_packet()
584 	struct iphdr *iph;  in add_ipv4_ts_option()
598 	iph = (struct iphdr *)(optpkt + ETH_HLEN);  in add_ipv4_ts_option()
602 	iph->check = checksum_fold(iph, sizeof(struct iphdr) + optlen, 0);  in add_ipv4_ts_option()
624 static void fix_ip4_checksum(struct iphdr *iph)  in fix_ip4_checksum()
627 	iph->check = checksum_fold(iph, sizeof(struct iphdr), 0);  in fix_ip4_checksum()
636 	struct iphdr *iph1;  in send_flush_id_case()
637 	struct iphdr *iph2;  in send_flush_id_case()
638 	struct iphdr *iph3;  in send_flush_id_case()
640 	iph1 = (struct iphdr *)(buf1 + ETH_HLEN);  in send_flush_id_case()
641 	iph2 = (struct iphdr *)(buf2 + ETH_HLEN);  in send_flush_id_case()
642 	iph3 = (struct iphdr *)(buf3 + ETH_HLEN);  in send_flush_id_case()
768 	struct iphdr *iph = (struct iphdr *)(buf + ETH_HLEN);  in send_fragment4()
785 	iph->check = checksum_fold(iph, sizeof(struct iphdr), 0);  in send_fragment4()
794 	struct iphdr *iph = (struct iphdr *)(buf + ETH_HLEN);  in send_changed_ttl()
802 	iph->check = checksum_fold(iph, sizeof(struct iphdr), 0);  in send_changed_ttl()
811 	struct iphdr *iph = (struct iphdr *)(buf + ETH_HLEN);  in send_changed_tos()
821 		iph->check = checksum_fold(iph, sizeof(struct iphdr), 0);  in send_changed_tos()
833 	struct iphdr *iph = (struct iphdr *)(buf + ETH_HLEN);  in send_changed_ECN()
842 		iph->check = checksum_fold(iph, sizeof(struct iphdr), 0);  in send_changed_ECN()
912 	struct iphdr *iph = (struct iphdr *)(buffer + ETH_HLEN);  in check_recv_pkts()
952 				- sizeof(struct tcphdr) - sizeof(struct iphdr);  in check_recv_pkts()
1309 		tcp_offset = ETH_HLEN + sizeof(struct iphdr);  in main()