ipf_dns_hdr_t
if (dlen < sizeof(ipf_dns_hdr_t)) {
ipf_dns_hdr_t *dns;
dns = (ipf_dns_hdr_t *)((char *)fin->fin_dp + sizeof(udphdr_t));
ipf_dns_hdr_t *dnh;
dnh = (ipf_dns_hdr_t *)((char *)fin->fin_dp + sizeof(udphdr_t));