IPV6_RTHDRDSTOPTS
case IPV6_RTHDRDSTOPTS:
case IPV6_RTHDRDSTOPTS:
case IPV6_RTHDRDSTOPTS:
case IPV6_RTHDRDSTOPTS:
if (optname == -1 || optname == IPV6_RTHDRDSTOPTS) {
case IPV6_RTHDRDSTOPTS:
case IPV6_RTHDRDSTOPTS: