NPFVAR_ICMP
icmp_type = npfvar_get_data(popts, NPFVAR_ICMP, 0);
icmp_code = npfvar_get_data(popts, NPFVAR_ICMP, 1);
if (!npfvar_add_element(vp, NPFVAR_ICMP, &type, sizeof(type)))
if (!npfvar_add_element(vp, NPFVAR_ICMP, &code, sizeof(code)))
[NPFVAR_ICMP] = "icmp",