Without any detail about your use case: I think what you want is not doable. In UDP you’d bind to receive incoming data, but receiving data (downlinks) in LoRaWAN is very limited. And in most cases only Class A is supported, so receiving is only possible after sending. And you cannot send all day just to receive data.
(Slightly related: Lib for c-like socket via LoRa protocol (not LoRaWAN)?)