IPV6_PORTRANGE
#if defined(IPV6_PORTRANGE)
setsockopt (sock, IPPROTO_IPV6, IPV6_PORTRANGE, &on, sizeof(on));
portrange = IPV6_PORTRANGE;
#ifdef IPV6_PORTRANGE
if (setsockopt(sd, IPPROTO_IPV6, IPV6_PORTRANGE,
case IPV6_PORTRANGE:
case IPV6_PORTRANGE:
case IPV6_PORTRANGE:
opt.sopt_name = IPV6_PORTRANGE;
portrange = IPV6_PORTRANGE;