I think you can do this:
<<0x66, 0x16, length::size(16)-unsigned-integer-big, result::binary-size(length), checksum::binary-size(@checksum_length)>>
the socket won’t close when you recv off of it!
It sounds like for your use case you may also want to try active sockets, which instead of recv() polling converts those messages to {:tcp, src, binary} messages sent directly to your GenServer, though keep in mind in extreme circumstances your GenServer might die and you’ll drop everything that was queued up on the floor with more-difficult-to-implement backpressure notification.
