I'm struggling to use NWListener and NWConnection on the same port.I have a simple task requires that I send out a UDP datagram to the broadcast address, and expect to receive replies on the port which sent the datagram. In Blue Sockets, I can create a socket, send out the broadcast message and listen and accept connections on the same socket.In wireshark the exchange looks like:10.0.0.123 255.255.255.255 UDP 71 62003 -> 9000 Len=29 10.0.0.202 10.0.0.123 UDP 1060 9000 -> 62003 Len=101However after hours of experimentation in a swift playground, I am not able to create an NWListener and an NWConnection on the same socket.Here are the salient pieces of code:let udpListener = try! NWListener(using: .udp) ... setup and start listener let broadcast: NWEndpoint.Host = "255.255.255.255" let portUDP: NWEndpoint.Port = 9000 let localPort : NWEndpoint.Port = udpListener!.port! let localEndpoint = NWEndpoint.hostPort(host: "10.0.0.123", port: localPort) let parameters = NWParameters.udp parameters.requiredLocalEndpoint = localEndpoint let connection = NWConnection(host: broadcast, port: portUDP, using: parameters)However creating the NWConnection on the same port as the NWListener gives an error that the port is in use. I've tried the reverse, createing the connection on a known port, closing it and starting a listener immediately affterwards on that same port, but that also results in an error.How can I implement this very simple protocol using the Network API ? Are there some options I need to set ?Thanks for any help.Guy