User Profile

@eskimo thanks for the reply - yes I confirmed that after changing the port number to 19000 instead of 1900 (on both my Client iOS App and tvOS server app) it does indeed work correctly. And it works correctly on the tvOS simulator using the correct SSDP port (1900), and I can see the port bound in lsof when it's running: MyTVApp      76639 ikura    5u  IPv4 0x5f8914619e22755b      0t0  UDP *:ssdp Here's my code block where the bind fails, it's using GCDAsyncSockets: // MARK: Socket Setup         let multicastSocket = GCDAsyncUdpSocket(delegate: self, delegateQueue: DispatchQueue.main)         multicastSocket.setIPv6Enabled(false)         do {             try multicastSocket.enableReusePort(true)             try multicastSocket.bind(toPort: 1900) // On AppleTV 4K tvOS14.6 this throws with 'Address in Use' error             try multicastSocket.joinMulticastGroup("239.255.255.250")             try multicastSocket.enableBroadcast(true)             try multicastSocket.beginReceiving()         } catch {             multicastSocket.close()             DispatchQueue.main.async {                 for observer in self.observers {                     observer.multicastSocketInitialisationFailed(error: error)                 }             }         }         self.multicastSocket = multicastSocket