NAT_ADD_NON_ESP_MARKER
iph1->natt_flags |= NAT_ADD_NON_ESP_MARKER;
iph1->natt_flags |= NAT_PORTS_CHANGED | NAT_ADD_NON_ESP_MARKER;
iph1->natt_flags |= NAT_PORTS_CHANGED | NAT_ADD_NON_ESP_MARKER;
#define NON_ESP_MARKER_USE(_ph1) ((_ph1)->natt_flags & NAT_ADD_NON_ESP_MARKER)