IP_FW_X
retval = setsockopt(fw3_socket, IPPROTO_IP, IP_FW_X, newbuf, len);
retval = getsockopt(fw3_socket, IPPROTO_IP, IP_FW_X, newbuf, &len);
case IP_FW_X:
case IP_FW_X:
case IP_FW_X: