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