IPPROTO_IPV6 242 source4/heimdal/lib/roken/socket.c if (setsockopt (sock, IPPROTO_IPV6, IPV6_PORTRANGE, &on, IPPROTO_IPV6 300 source4/heimdal/lib/roken/socket.c setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&val, sizeof(val));