I found some Swift code, but when I try to use it I get a different error. In the following code the status goes from preparing to waiting. I have show both the code and the logs in Xcode below.
Thoughts?
//
// ContentView.swift
// UDP Broadcast Test
//
// Created by Tony Pitman on 12/19/24.
//
import SwiftUI
import Network
struct ContentView: View {
var body: some View {
VStack {
Image(systemName: "globe")
.imageScale(.large)
.foregroundStyle(.tint)
Text("Hello, world!")
Button("UDP Test") {
let connection = NWConnection(host: "255.255.255.255", port: 11000, using: .udp)
connection.stateUpdateHandler = { (newState) in
print("This is stateUpdateHandler:")
switch (newState) {
case .ready:
print("State: Ready\n")
self.sendUDP(connection: connection, content: "Polaris Discovery")
self.receiveUDP(connection: connection)
case .setup:
print("State: Setup\n")
case .cancelled:
print("State: Cancelled\n")
case .preparing:
print("State: Preparing\n")
case .waiting(let error):
print("State: Waiting: \(error)\n")
default:
print("ERROR! State not defined!\n")
}
}
connection.start(queue: .global())
}
}
.padding()
}
func sendUDP(connection: NWConnection, content: Data) {
connection.send(content: content, completion: NWConnection.SendCompletion.contentProcessed(({ (NWError) in
if (NWError == nil) {
print("Data was sent to UDP")
} else {
print("ERROR! Error when data (Type: Data) sending. NWError: \n \(NWError!)")
}
})))
}
func sendUDP(connection: NWConnection, content: String) {
let contentToSendUDP = content.data(using: String.Encoding.utf8)
connection.send(content: contentToSendUDP, completion: NWConnection.SendCompletion.contentProcessed(({ (NWError) in
if (NWError == nil) {
print("Data was sent to UDP")
} else {
print("ERROR! Error when data (Type: Data) sending. NWError: \n \(NWError!)")
}
})))
}
func receiveUDP(connection: NWConnection) {
connection.receiveMessage { (data, context, isComplete, error) in
if (isComplete) {
print("Receive is complete")
if (data != nil) {
let backToString = String(decoding: data!, as: UTF8.self)
print("Received message: \(backToString)")
} else {
print("Data == nil")
}
}
}
}
}
#Preview {
ContentView()
}
Log output including the waiting error:
NSBundle file:///System/Library/PrivateFrameworks/MetalTools.framework/ principal class is nil because all fallbacks have failed
This is stateUpdateHandler:
This is stateUpdateHandler:
State: Preparing
This is stateUpdateHandler:
State: Waiting: POSIXErrorCode(rawValue: 50): Network is down
State: Waiting: POSIXErrorCode(rawValue: 50): Network is down
