nm_iphdr
uint16_t nm_os_csum_ipv4(struct nm_iphdr *iph)
return nm_os_csum_fold(nm_os_csum_raw((uint8_t*)iph, sizeof(struct nm_iphdr), 0));
nm_os_csum_tcpudp_ipv4(struct nm_iphdr *iph, void *data,
uint16_t nm_os_csum_ipv4(struct nm_iphdr *iph);
void nm_os_csum_tcpudp_ipv4(struct nm_iphdr *iph, void *data,
struct nm_iphdr *iph = (struct nm_iphdr *)
struct nm_iphdr *iph = (struct nm_iphdr *)(pkt);