It doesn’t seem like there’s any high level, first-party documentation on how to use what is the recommended API for executing networking logic that you otherwise wouldn’t use URLSession for; which is a lot of things. There’s a sample app, and docs on how to choose the right network API in general, but apparently no high level API docs for Network.framework itself. Am I missing something? How do people learn to use this? Know which classes to use? Know the various ways it can be configured?

I'm using Network Framework to transfer files between 2 devices. The "secondary" device sends file requests to the "primary" device, and the primary sends the files back. When the primary gets the request, it responds like this: do { let data = try Data(contentsOf: filePath) let priSecDataFilePacket = PriSecDataFilePacket(fileName: filename, dataBlob: data) let jsonData = try JSONEncoder().encode(priSecDataFilePacket) let message = NWProtocolFramer.Message(priSecMessageType: PriSecMessageType.priToSecDataFile) let context = NWConnection.ContentContext(identifier: "TransferUtility", metadata: [message]) connection.send(content: encodedJsonToSend, contentContext: context, isComplete: true, completion: .idempotent) } catch { print("\(error)") } It works great, even for hundreds of file requests. The problem arises if some files being requested are extremely large, like 600MB. You can see the memory speedometer on the primary quickly ramp up to the yellow zone, at which point iOS kills the app for high memory use, and you see the Jetsam log. I changed the code to skip JSON encoding the binary file as a test, and that helped a bit, but it still goes too high; the real offender is the step where it loads the 600MB file into the data var: let data = try Data(contentsOf: filePath) If I remark out everything else and just leave that one line, I can still see the memory use spike. As a fix, I'm rewriting this so the secondary requests the file in 5MB chunks by telling the primary a byte range such as "0-5242880" or "5242881-10485760", and then reassembling the chunks on the secondary once they all come in. So far this seems promising, but it's a fair amount of work. My question: Does Network Framework have a built-in way to stream those bytes straight from disk as it sends them? So that I could send all the data in one single request without having to load the bytes into memory?

I'm working on a game that uses NWBrowser and NWListener to create a connection between an iOS and tvOS app. I've got the initial networking up and running and it works perfectly when running in the simulator(s). However, when I run on-device(s), I've found that browseResultsChangedHandler gets called multiple times for what is ostensibly the same service. My browser handler (which runs on iOS) looks like this: browser.browseResultsChangedHandler = { [weak self] results, changes in if let result = browser.browseResults.first { self?.onPeerConnected?(PeerConnection(endpoint: result.endpoint)) } } The first time it gets called, the interface in the NWBrowser.Result is en0, but the 2nd time it gets called, it is en0 AND awdl0. Because my current handling is so naive, this re-invocation ends up with two connections being made to the remote server (the Apple TV). Now, I know that this handler, by its very name, is designed to be called multiple times as things change, so I'm curious as to what strategies I might employ here. Is there any value in tearing down any previous connections and re-connecting using the latest one? Should I just kill the browser as soon as I handle the first one? Just ignore subsequent ones? I'm sure that, to a degree, the answer is probably "it depends"... but I'm curious to see if there might be at least some high-level strategies like "whatever you do, don't do xxxx" or "most apps do yyyy" :-) Thanks.

Hello, We are currently working on a zero-configuration networking compliant device thru avahi-daemon (for mDNS/DNS-SD handling) and avahi-autoipd (for link-local address configuration). Our test environment setup is: Device Under Test (DUT): Debian 9 Linux avahi-daemon: v0.6.32 avahi-autoipd: v0.6.32 Test Bed: Macmini with macOS Sequoia 15.0 Bonjour Conformance Test v1.5.4 Router: NEC Aterm WR8370N Devices are connected via LAN SRV PROBING/ANNOUNCEMENTS BASIC test failure was encountered in BCT during Multicast-DNS test suite execution. Please see the logs below: ERROR 2025-01-15 19:36:35.792930+0900: Cache flush bit is set in the SRV probes NOTICE 2025-01-15 19:36:35.792946+0900: DEVICE-sERvICE-32\._uSCaNs\._tcp\.lOcaL\.._uscAnS._tCP.loCAL., SEND_CONFLICT_WIN -> SEND_CONFLICT_WIN FAILED (SRV PROBING/ANNOUNCEMENTS BASIC) START (SRV PROBING/ANNOUNCEMENTS) DEBUG_2 2025-01-15 19:36:35.792979+0900: received packet (1137 bytes) DEBUG_2 2025-01-15 19:36:35.792999+0900: srv_cf_probe WARNING 2025-01-15 19:36:35.793022+0900: SRV Probing/Announcements Failed: See runtime output for PROBING and WINNING SIMULTANEOUS PROBE for details. FAILED (SRV PROBING/ANNOUNCEMENTS) We would like to know what causes the above test to fail, is it related to avahi or a an inccorect mDNS service handling wherein the cache flush bit was incorrectly set? Thank you.

I'm trying to detect the state of Local Network privacy on macOS Sequoia via NWBrowser, as recommended in https://developer.apple.com/documentation/technotes/tn3179-understanding-local-network-privacy Regardless of the state of Local Network privacy - undetermined, allowed or denied, NWBrowser receives an update indicating that its in the ready state. Scanning does not seem to trigger the Local Network privacy alert for me - I have to use the other recommended method to trigger the prompt. Enabling or disabling Local Network privacy does not seem to send any updates for NWBrowser. https://developer.apple.com/forums/thread/666431 seems related, and implies that they did receive further updates to NWBrowser. Filed as FB16077972