NWConnectionGroup stateUpdateHandler not called for failed states

I'm building a network client with Swift (using QUIC). I set everything up properly (I know this because I can successfully connect, send and receive streams). But I'm trying to catch connection errors.

For example if I try to connect to a totally bogus IP address, I would like to display Connecting, then ConnectionFailed

I do the following:

  • create my NWMultiplexGroup descriptor
  • set my appropriate NWParameters
  • create my NWConnectionGroup
  • set up my handlers (setReceiveHandler, newConnectionHandler) and my state update handler
  • i call connection.start

When I pass a valid address to a server that is listening for the connection, all is good - in my stateUpdateHandler I get the .ready state, but I don't get any intermediate states, and if I pass it a bogus IP address, I get absolutely no callbacks to my handler

(I would have expected to get .waiting and/or .failed)

I couldn't find any quic options that I'm not doing, and the apple documentation is not helpful

Any suggestions as to what I might be missing?

NWConnectionGroup stateUpdateHandler not called for failed states
 
 
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