iptun_ipv6hdrs_t
header_size = sizeof (iptun_ipv6hdrs_t);
iptun_ipv6hdrs_t *newouter6;
newmp = allocb(sizeof (iptun_ipv6hdrs_t) + MBLKL(mp), BPRI_MED);
newmp->b_wptr += sizeof (iptun_ipv6hdrs_t);
newouter6 = (iptun_ipv6hdrs_t *)newmp->b_rptr;
iptun_ipv6hdrs_t *v6hdrs;
v6hdrs = (iptun_ipv6hdrs_t *)mp->b_rptr;
v6hdrs = (iptun_ipv6hdrs_t *)mp->b_rptr;
ixa->ixa_ip_hdr_length = sizeof (iptun_ipv6hdrs_t);
iptun->iptun_header_size = sizeof (iptun_ipv6hdrs_t);
iptun_ipv6hdrs_t ihu_hdr6;