We are having iPhone application which is communicating with apple watch application using network classes. We are using NWConnection and NWListener for peer to peer communication. We have created UdpClient which is using bonjour service "camera.udp" please check the code below UDPClient.swift import Foundation import Network import WatchKit protocol UDPClientDelegate {     func connectionDone()     func dataSendSuccesfully()     func socketConnectionStoped()     func receivedReplyWithDict(dict : [String : Any]) } enum ConnectionState {     case settingUP     case started     case dataBeingSent     case disconnected } class UDPClient { var count : Int = 0 var udpDelegate: UDPClientDelegate? var connection : NWConnection? var queue : DispatchQueue = DispatchQueue.global(qos: .userInitiated) var serviceName : String? var connectedState : ConnectionState = .disconnected var dataArray : Array<Any> static let sharedInstance: UDPClient = {         let instance = UDPClient()         return instance     }() init(){      dataArray = Array()     }     func setupConnection(name: String){         serviceName = name         let parameters = NWParameters.udp         // Create the connection         connection = NWConnection(to: .service(name: name, type: "_camera._udp", domain: "local", interface: nil), using: parameters)         // Set the state update handler         connection?.stateUpdateHandler = { (newState) in             switch (newState){             case .ready:                 print("Ready To Send")             case .failed(let error):                 print("Connection State: \(error)")             case .preparing:                 print("Preparing...")             case .waiting(let error):                 print("Waiting: \(error)")             default:                 print("def")                 break             }         }         connectedState = .settingUP         setupReceive()     }     func startConnection() {         // Start the connection         if(connectedState == .settingUP){             connection?.start(queue: queue)             connectedState = .started         }     }     func stopConnection(){         sendDisconnectACK()         connection?.cancelCurrentEndpoint()         connectedState = .disconnected         connection = nil         print("Stopped")     }     //MARK:- Receive Data     func setupReceive() {         if connection != nil{             connection?.receiveMessage { (content, context, isComplete, error) in                 if content != nil{                     self.processReplyFromIOS(content: content!)                 }                 self.setupReceive()             }         }else{             return         }     }     func processReplyFromIOS(content : Data){         var receivedData = [:] as [String : Any]         do{             if let oppData = try NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(content){             receivedData = oppData as! [String : Any]             }         }catch let error{             print(error)         }         if receivedData["Connected"] != nil{             print("Got Connected")             self.connectedState = .dataBeingSent         }else{         }     } //MARK:- Send Data // Send Connection data     func sendConnectionRequest(){ &#9;&#9;&#9; WKInterfaceDevice.current().isBatteryMonitoringEnabled = true &#9; let dic = ["ConnetionRequest":"Request","batteryLevel":watchBatteryPercentage] as [String : Any]         let dataExample: Data = NSKeyedArchiver.archivedData(withRootObject: dic)         connection?.send(content: dataExample, completion: .contentProcessed({ (error) in             if let error = error{                 print("Send error \(error)")             }         }))     }     var watchBatteryPercentage:Int {         return Int(roundf(WKInterfaceDevice.current().batteryLevel * 100))     } func sendData(dic :[String : Any]){         let data: Data = NSKeyedArchiver.archivedData(withRootObject: dic)   connection?.send(content: data, completion: .idempotent)     }     // Send Disconnection Ack     func sendDisconnectACK(){         let disconnectionData = ["Disconnected" : true] as [String : Any]         let dataExample: Data = NSKeyedArchiver.archivedData(withRootObject: disconnectionData)         connection?.send(content: dataExample, completion: .contentProcessed({ (error) in             if let error = error{                 print("Send error \(error)")             }         }))     } }

Development OS & Xcode used : WatchOS 7 beta 7 IOS 14 beta 7 Xcode 12 beta 5 Problem faced : We are able to run and get the desired result when running this project in iOS 13 & watchOS 6, But while running in the beta versions I’m getting error that “Failed to attach socket protocol.” Console Log: 2020-08-29 18:33:52.099781+0530 dataSend Extension[562:368916] [default] lookupMainFuncAddressInMachHeader:71: Invalid Swift entry point data 2020-08-29 18:33:52.100530+0530 dataSend Extension[562:368916] [default] lookupMainFuncAddressInMachHeader:77: Swift entry point addres could not be determined . 2020-08-29 18:34:40.702492+0530 dataSend Extension[562:368916] [bgapprefresh] -[SPApplicationDelegate prepareForSnapshotWithReason:userInfo:completion:]:3030: PrepareForSnapshot called on an application that is running in the dock or foreground, completing immediately 2020-08-29 18:36:03.781503+0530 dataSend Extension[562:369291] [] nwendpointproxycopysynthesizedurl Endpoint type is not an address or host, cannot synthesize URL 2020-08-29 18:36:03.781910+0530 dataSend Extension[562:369291] [connection] nwendpointproxymatchesexception [C1 MinderService.camera.udp.local. inprogress proxy (unsatisfied (Path was denied by NECP policy), interface: ipsec2, ipv4, ipv6)] invalid proxy endpoint type 3 2020-08-29 18:36:03.782083+0530 dataSend Extension[562:369291] [connection] nwendpointproxymatchesexception [C1 MinderService.camera.udp.local. inprogress proxy (unsatisfied (Path was denied by NECP policy), interface: ipsec2, ipv4, ipv6)] invalid proxy endpoint type 3 2020-08-29 18:36:03.782456+0530 dataSend Extension[562:369291] [connection] nwendpointproxymatchesexception [C1 MinderService.camera.udp.local. inprogress proxy (unsatisfied (Path was denied by NECP policy), interface: ipsec2, ipv4, ipv6)] invalid proxy endpoint type 3 2020-08-29 18:36:03.782623+0530 dataSend Extension[562:369291] [connection] nwendpointproxymatchesexception [C1 MinderService.camera.udp.local. inprogress proxy (unsatisfied (Path was denied by NECP policy), interface: ipsec2, ipv4, ipv6)] invalid proxy endpoint type 3 2020-08-29 18:36:03.788047+0530 dataSend Extension[562:369291] [connection] nwendpointproxymatchesexception [C1 MinderService.camera.udp.local. inprogress proxy (unsatisfied (Path was denied by NECP policy), interface: ipsec2, ipv4, ipv6)] invalid proxy endpoint type 3 2020-08-29 18:36:03.788627+0530 dataSend Extension[562:369291] [connection] nwendpointproxymatchesexception [C1 MinderService.camera.udp.local. inprogress proxy (unsatisfied (Path was denied by NECP policy), interface: ipsec2, ipv4, ipv6)] invalid proxy endpoint type 3 2020-08-29 18:36:03.789221+0530 dataSend Extension[562:369291] [connection] nwendpointproxymatchesexception [C1 MinderService.camera.udp.local. inprogress proxy (unsatisfied (Path was denied by NECP policy), interface: ipsec2, ipv4, ipv6)] invalid proxy endpoint type 3 2020-08-29 18:36:03.790063+0530 dataSend Extension[562:369291] [connection] nwendpointproxymatchesexception [C1 MinderService.camera.udp.local. inprogress proxy (unsatisfied (Path was denied by NECP policy), interface: ipsec2, ipv4, ipv6)] invalid proxy endpoint type 3 2020-08-29 18:36:03.790239+0530 dataSend Extension[562:369291] [connection] nwendpointproxymatchesexception [C1 MinderService.camera.udp.local. inprogress proxy (unsatisfied (Path was denied by NECP policy), interface: ipsec2, ipv4, ipv6)] invalid proxy endpoint type 3 2020-08-29 18:36:03.790397+0530 dataSend Extension[562:369291] [connection] nwendpointproxymatchesexception [C1 MinderService.camera.udp.local. inprogress proxy (unsatisfied (Path was denied by NECP policy), interface: ipsec2, ipv4, ipv6)] invalid proxy endpoint type 3 Preparing ... Waiting: POSIXErrorCode: Network is down 2020-08-29 18:36:05.668966+0530 dataSend Extension[562:369291] [connection] nwsocketinitializesocket [C1.1:3] Data mode 0 unrecognized 2020-08-29 18:36:05.669092+0530 dataSend Extension[562:369291] [connection] nwsocketaddinputhandler [C1.1:3] Failed to initialize socket 2020-08-29 18:36:05.669265+0530 dataSend Extension[562:369291] [connection] nwendpointflowattachprotocols [C1.1 fd74:6572:6d6e:7573:d:8ea4:c65a:3cd3.62742 in_progress socket-flow (satisfied (Path is satisfied), interface: ipsec2, scoped, ipv4, ipv6)] Failed to attach socket protocol Waiting: POSIXErrorCode: Network is down Measures Taken: Have seen the WWDC2020 video on changes in privacy settings . https://developer.apple.com/videos/play/wwdc2020/10110 / inPlist for iOS: Added Privacy - Local Network Usage Description Bonjour Services - in array added the Service as camera.udp Other doubts: camera._udp is a public service right?. If we needed to make a private service for our app do we need to register the service to IANA This is a screenshot of the Transcript of the WWDC video that we are following . Can you please explain if registering our own service is good for our app or if we should continue using public services If you want I can add test project that we have created which is also working fine on iOS 13 and watch OS 6 but not working on iOS 14 beta and watch 7 beta