ip6_vfc
ver = (iph->ip6_vfc & 0xf0) >> 4;
if (((v6hdr->ip6_vfc & 0xf0) >> 4) != IPV6_VERSION) {
hdr_ip6.ip6_vfc = 0x60;
hdr_ip6.ip6_vfc = 0x60;
hdr_ip6.ip6_vfc = 0x60;
ip6->ip6_vfc = 0x60;