169 static uint16_t checksum(void *th, uint16_t proto, size_t len)  in checksum()  argument
184 		return checksum_fold(th, len, sum);  in checksum()
194 	iph->ihl = 5;  in build_packet_ipv4()
258 	struct tcphdr *th = _th;  in build_packet_tcp()  local
260 	th->source = htons(cfg_port_src);  in build_packet_tcp()
261 	th->dest = htons(cfg_port_dst);  in build_packet_tcp()
262 	th->doff = 5;  in build_packet_tcp()
263 	th->check = 0;  in build_packet_tcp()
265 	th->check = checksum(th, IPPROTO_TCP, sizeof(*th) + cfg_payload_len);  in build_packet_tcp()
268 		th->check = ~th->check;  in build_packet_tcp()
270 	fprintf(stderr, "tx: sending checksum: 0x%x\n", th->check);  in build_packet_tcp()
271 	return th + 1;  in build_packet_tcp()
402 		   &eth[0], &eth[1], &eth[2], &eth[3], &eth[4], &eth[5]) != 6)  in eth_str_to_addr()
590 static int recv_verify_csum(void *th, int len, uint16_t sport, uint16_t csum_field)  in recv_verify_csum()  argument
594 	csum = checksum(th, cfg_proto, len);  in recv_verify_csum()
616 static int recv_verify_packet_tcp(void *th, int len)  in recv_verify_packet_tcp()  argument
618 	struct tcphdr *tcph = th;  in recv_verify_packet_tcp()
623 	return recv_verify_csum(th, len, ntohs(tcph->source), tcph->check);  in recv_verify_packet_tcp()
626 static int recv_verify_packet_udp_encap(void *th, int len)  in recv_verify_packet_udp_encap()  argument
628 	struct udp_encap_hdr *eh = th;  in recv_verify_packet_udp_encap()
636 static int recv_verify_packet_udp(void *th, int len)  in recv_verify_packet_udp()  argument
638 	struct udphdr *udph = th;  in recv_verify_packet_udp()
650 	return recv_verify_csum(th, len, ntohs(udph->source), udph->check);  in recv_verify_packet_udp()