find_engine_iface_by_id
if ((engine_iface = find_engine_iface_by_id(rs->if_index)) == NULL)
if ((engine_iface = find_engine_iface_by_id(if_index)) == NULL) {
if ((engine_iface = find_engine_iface_by_id(if_index)) == NULL) {
struct engine_iface *find_engine_iface_by_id(uint32_t);