Hi, This is something I'd been thinking about for a while; we already have NLA_MIN_LEN, NLA_BINARY (with a max len), and NLA_EXACT_LEN, but in quite a few places (as you can see in the last patch here) we need a range, and we already have a way to encode ranges for integer ranges, so it's pretty easy to use that for binary length ranges as well. So at least for wireless this seems useful to save some code, and to (mostly) expose the actual limits to userspace via the policy export that we have now. What do you think? johannes