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NWParemeters.requiredLocalEndpoint is ignored in VisionOS
I have a an application that incorporates a RTCP client to communicate with a local networked device. The device's RTCP implementation requires that the local RTCP port be 6970 even for the initial outbound connection. I have an implementation that is working just fine on macOS and iOS, but I when I port this to visionOS, I see that the local connection is ignoring my .requiredLocalEndpoint specification and choosing a random port (I can see this is happening in Wireshark via the VisionOS simulator.) let remoteRtcpEndpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(remoteRTCPAddress), port: NWEndpoint.Port(rawValue: remoteRTCPPort)!) let rtcpParameters = NWParameters.udp let localEndpoint = NWEndpoint.hostPort(host: NWEndpoint.Host("0.0.0.0"), port: NWEndpoint.Port(rawValue: localRTPPort)!) Self.logger.info("Starting rtcp with local port \(localRTPPort), remote address \(remoteRTCPAddress), endpoint \(String(describing: localEndpoint))") rtcpParameters.requiredLocalEndpoint = localEndpoint rtcpParameters.allowLocalEndpointReuse = true remoteRtcpConnection = NWConnection(to: remoteRtcpEndpoint, using: rtcpParameters) remoteRtcpConnection.start(queue: .global()) And here's the code that sends the command. remoteRtcpConnection.send(content: RtcpPacket.vdly(delayMs: HUGE_FIXED_VDLY_MS).packet(), completion: .contentProcessed({ error in if let error = error { Self.logger.warning("Error sending VDLY packet \(error)") continuation.resume(throwing: error) } else { Self.logger.debug("VDLY Sent \(self.HUGE_FIXED_VDLY_MS)") continuation.resume(returning: ()) } })) If this is a known limitation of the Network framework, should I revert to BSD sockets or something? How can I work around this? Additionally, I don't have a VisionOS device, so I am using the simulator, could this be a problem with the simulator's network bridge?
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Mar ’24