RANGECHK
RANGECHK(V_ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
RANGECHK(V_ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
RANGECHK(V_ipport_firstauto, IPPORT_RESERVED, IPPORT_MAX);
RANGECHK(V_ipport_lastauto, IPPORT_RESERVED, IPPORT_MAX);
RANGECHK(V_ipport_hifirstauto, IPPORT_RESERVED, IPPORT_MAX);
RANGECHK(V_ipport_hilastauto, IPPORT_RESERVED, IPPORT_MAX);