RTA_NEXT function
Implementation
Tuple2<ffi.Pointer<rtattr>, int> RTA_NEXT(ffi.Pointer<rtattr> rta, int attrlen) {
final newAttrlen = attrlen - RTA_ALIGN(rta.ref.rta_len);
final addr = rta.address + RTA_ALIGN(rta.ref.rta_len);
final ptr = ffi.Pointer<rtattr>.fromAddress(addr);
return Tuple2(ptr, newAttrlen);
}