We need your assistance as we are currently facing an issue without a workaround for users on macOS 15.4 and 15.5. FeedbackID: FB17547675 The problem has been observed on macOS versions 15.4 and 15.5. Apple has acknowledged this issue and confirmed that it is fixed in the macOS 15.6 beta. Although we tried to reproduce the issue in our environment, it did not occur, even on macOS 15.5. Therefore, we cannot verify if the fix in macOS 15.6 beta resolves the problem. We are actively working to identify an appropriate workaround for users on macOS 15.5. Some users have reported a failure to obtain an IP address over Wi-Fi, possibly due to a DHCP failure. As a temporary solution, we added logic to restart Wi-Fi programmatically when either an APIPA address (169.254.x.x) or no IPv4 address is detected on the active interface. However, restarting Wi-Fi does not always resolve the issue, and the device may still fail to obtain an IP address over Wi-Fi or Ethernet. Could you advise if there is a reliable method to detect DHCP failure and recover the device from this state? Also, any idea, how we can reproduce this scenario in our machine? Below is the failure. default 2025-06-27 10:07:57.055003 -0700 configd DHCP en0: ARP router: No leases to query for default 2025-06-27 10:07:57.055269 -0700 configd DHCP en0: status = 'no server' default 2025-06-27 10:08:23.336215 -0700 airportd WiFiUsageBssSession:: ChannelAfterRoam=0; ChannelAtJoin=36; FaultReasonApsdTimedOut=0; FaultReasonArpFailureCount=0; FaultReasonBrokenBackhaulLinkFailed=0; FaultReasonDhcpFailure=0; default 2025-06-27 10:08:23.367852 -0700 configd DHCP en0: status = 'media inactive' default 2025-06-27 10:08:23.367909 -0700 configd DHCP en0: INACTIVE default 2025-06-27 10:08:23.988565 -0700 configd DHCP en0: status = 'media inactive' default 2025-06-27 10:08:23.988703 -0700 configd DHCP en0: INACTIVE info 2025-06-27 10:08:23.988852 -0700 configd DHCPv6 en0: Inactive default 2025-06-27 10:08:35.656415 -0700 configd DHCP en0: status = 'network changed' default 2025-06-27 10:08:35.656817 -0700 configd DHCP en0: INIT default 2025-06-27 10:08:35.656821 -0700 configd DHCP en0: supplying device type 'Mac' info 2025-06-27 10:08:35.656934 -0700 configd DHCP en0: busy default 2025-06-27 10:08:35.657351 -0700 configd DHCP en0: INIT waiting at 0 for 1.358613 info 2025-06-27 10:08:35.657404 -0700 configd DHCPv6 en0: Inactive default 2025-06-27 10:08:37.019229 -0700 configd DHCP en0: INIT waiting at 1.36206 for 2.113913 default 2025-06-27 10:08:39.136955 -0700 configd DHCP en0: INIT waiting at 3.47937 for 4.462224 default 2025-06-27 10:08:43.602229 -0700 configd DHCP en0: ARP router: No leases to query for default 2025-06-27 10:08:43.603143 -0700 configd DHCP en0: INIT waiting at 7.94533 for 8.128784 default 2025-06-27 10:08:51.735532 -0700 configd DHCP en0: ARP router: No leases to query for default 2025-06-27 10:08:51.735846 -0700 configd DHCP en0: INIT waiting at 16.0786 for 8.749985 default 2025-06-27 10:09:00.488315 -0700 configd DHCP en0: ARP router: No leases to query for default 2025-06-27 10:09:00.488550 -0700 configd DHCP en0: INIT waiting at 24.8313 for 8.496864 default 2025-06-27 10:09:08.988284 -0700 configd DHCP en0: ARP router: No leases to query for default 2025-06-27 10:09:08.988310 -0700 configd DHCP en0: reported address acquisition failure symptom default 2025-06-27 10:09:08.988579 -0700 configd DHCP en0: INIT waiting at 33.3312 for 8.300735 default 2025-06-27 10:09:17.294478 -0700 configd DHCP en0: ARP router: No leases to query for info 2025-06-27 10:09:17.294485 -0700 configd DHCP en0: symptom failure already reported default 2025-06-27 10:09:17.295454 -0700 configd DHCP en0: INIT waiting at 41.6373 for 8.798768 default 2025-06-27 10:09:26.096673 -0700 configd DHCP en0: ARP router: No leases to query for info 2025-06-27 10:09:26.096688 -0700 configd DHCP en0: symptom failure already reported default 2025-06-27 10:09:26.097553 -0700 configd DHCP en0: INIT waiting at 50.4394 for 8.807943 default 2025-06-27 10:09:34.909050 -0700 configd DHCP en0: ARP router: No leases to query for info 2025-06-27 10:09:34.909054 -0700 configd DHCP en0: symptom failure already reported default 2025-06-27 10:09:34.909375 -0700 configd DHCP en0: INIT waiting at 59.2517 for 8.877971 default 2025-06-27 10:09:43.792458 -0700 configd DHCP en0: ARP router: No leases to query for info 2025-06-27 10:09:43.792464 -0700 configd DHCP en0: symptom failure already reported default 2025-06-27 10:09:43.793641 -0700 configd DHCP en0: status = 'no server' info 2025-06-27 10:09:43.794145 -0700 configd DHCP en0: not busy DNS failure resolver #1 flags : reach : 0x00000000 (Not Reachable) resolver #2 domain : local options : mdns timeout : 5 flags : reach : 0x00000000 (Not Reachable) order : 300000 resolver #3 domain : 254.169.in-addr.arpa options : mdns timeout : 5 flags : reach : 0x00000000 (Not Reachable) order : 300200 resolver #4 domain : 8.e.f.ip6.arpa options : mdns timeout : 5 flags : reach : 0x00000000 (Not Reachable) order : 300400 resolver #5 domain : 9.e.f.ip6.arpa options : mdns timeout : 5 flags : reach : 0x00000000 (Not Reachable) order : 300600 resolver #6 domain : a.e.f.ip6.arpa options : mdns timeout : 5 flags : reach : 0x00000000 (Not Reachable) order : 300800 resolver #7 domain : b.e.f.ip6.arpa options : mdns timeout : 5 flags : reach : 0x00000000 (Not Reachable) order : 301000 Route table Destination Gateway Flags Netif Expire 127 127.0.0.1 UCS lo0 127.0.0.1 127.0.0.1 UH lo0 169.254 link#14 UCS en0 ! 169.254.160.160/32 link#14 UCS en0 ! 224.0.0/4 link#14 UmCS en0 ! 224.0.0.251 1:0:5e:0:0:fb UHmLWI en0 239.255.255.250 1:0:5e:7f:ff:fa UHmLWI en0 255.255.255.255/32 link#14 UCS en0 !

We have a setup where the system uses proxy settings configured via a PAC file. We are investigating how NWConnection behaves inside a Network Extension (NETransparentProxyProvider) with a transparent proxy configuration based on this PAC file. Scenario: The browser makes a connection which the PAC file resolves as "DIRECT" (bypassing the proxy) Our Network Extension intercepts this traffic for analysis The extension creates a new connection using NWConnection to the original remote address. The issue: despite the PAC file’s "DIRECT" decision, NWConnection still respects the system proxy settings and routes the connection through the proxy. Our questions: Is it correct that NWConnection always uses the system proxy if configured ? Does setting preferNoProxies = true guarantee bypassing the system proxy? Additionally: Whitelisting IPs in the Network Extension to avoid interception is not a viable solution because IPs may correspond to multiple services, and the extension only sees IP addresses, not domains (e.g., we want to skip scanning meet.google.com traffic but still scan other Google services on the same IP range). Are there any recommended approaches or best practices to ensure that connections initiated from a Network Extension can truly bypass the proxy (for example, for specific IP ranges or domains)?

Hello, I am seeking guidance regarding the com.apple.managed.vpn.shared keychain access group entitlement for our iOS app, which is required to support managed VPN configurations distributed via MDM profiles. Background: Our app uses the Network Extension framework and requires access to VPN credentials stored in configuration profiles, which—according to Apple documentation and forum posts—necessitates the com.apple.managed.vpn.shared entitlement We have already enabled the standard Network Extension entitlements via the Apple Developer portal What I Have Tried: I referenced the advice from a past Apple DTS engineer in this forum post: https://developer.apple.com/forums/thread/67613 I have submitted multiple requests to Apple Developer Technical Support (DTS) over the past two months, clearly explaining our use case and referencing the official documentation as well as the above forum thread Unfortunately, I have either received no response or responses that do not address my request for the special entitlement Questions: Has anyone successfully received the com.apple.managed.vpn.shared entitlement recently? If so, what was the process and how long did it take? Is there a specific format or information I should include in my DTS request to expedite the process or avoid misunderstandings? Are there any alternative contacts or escalation paths within Apple Developer Support for cases where standard DTS requests are ignored or misunderstood? Thank you in advance for your help

IMPORTANT The resume rate limiter is now covered by the official documentation. See Use background sessions efficiently within Downloading files in the background. So, the following is here purely for historical perspective. NSURLSession’s background session support on iOS includes a resume rate limiter. This limiter exists to prevent apps from abusing the background session support in order to run continuously in the background. It works as follows: nsurlsessiond (the daemon that does all the background session work) maintains a delay value for your app. It doubles that delay every time it resumes (or relaunches) your app. It resets that delay to 0 when the user brings your app to the front. It also resets the delay to 0 if the delay period elapses without it having resumed your app. When your app creates a new task while it is in the background, the task does not start until that delay has expired. To understand the impact of this, consider what happens when you download 10 resources. If you pass them to the background session all at once, you see something like this: Your app creates tasks 1 through 10 in the background session. nsurlsessiond starts working on the first few tasks. As tasks complete, nsurlsessiond starts working on subsequent ones. Eventually all the tasks complete and nsurlsessiond resumes your app. Now consider what happens if you only schedule one task at a time: Your app creates task 1. nsurlsessiond starts working on it. When it completes, nsurlsessiond resumes your app. Your app creates task 2. nsurlsessiond delays the start of task 2 a little bit. nsurlsessiond starts working on task 2. When it completes, nsurlsessiond resumes your app. Your app creates task 3. nsurlsessiond delays the start of task 3 by double the previous amount. nsurlsessiond starts working on task 3. When it completes, nsurlsessiond resumes your app. Steps 8 through 11 repeat, and each time the delay doubles. Eventually the delay gets so large that it looks like your app has stopped making progress. If you have a lot of tasks to run then you can mitigate this problem by starting tasks in batches. That is, rather than start just one task in step 1, you would start 100. This only helps up to a point. If you have thousands of tasks to run, you will eventually start seeing serious delays. In that case it’s much better to change your design to use fewer, larger transfers. Note All of the above applies to iOS 8 and later. Things worked differently in iOS 7. There’s a post on DevForums that explains the older approach. Finally, keep in mind that there may be other reasons for your task not starting. Specifically, if the task is flagged as discretionary (because you set the discretionary flag when creating the task’s session or because the task was started while your app was in the background), the task may be delayed for other reasons (low power, lack of Wi-Fi, and so on). Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = "eskimo" + "1" + "@" + "apple.com" (r. 22323366)

Hi everyone, I’m working on an iOS project where an iPhone needs to connect to external scanners (dedicated hardware devices) over Wi-Fi. The goal is to: Discover available Wi-Fi networks from the scanner devices (broadcasting their own networks). Allow the user to seamlessly connect to the chosen scanner network. Network Discovery: Is there a way to programmatically list available Wi-Fi networks (SSIDs) on iOS without private APIs? If not, are there workarounds (e.g., Bonjour/mDNS)? Seamless Connection: As I see, we can use NEHotspotConfigurationManager to connect to and disconnect from specified networks and there will always be a system alert asking about do we really want to join this network Hardware/Firmware/Software Alternatives: If iOS restrictions prevent this, what alternatives exist? For example: Hardware: Scanners supporting Bluetooth LE for initial pairing, then Wi-Fi provisioning. Firmware: Scanners acting as clients on the same network as the iPhone (e.g., via user’s home/office Wi-Fi). Software: A companion app for the scanner that shares network credentials via QR code/NFC, or a local web server on the scanner for setup. Context: Target: iOS 16+ No jailbreaking; App Store compliance is a must. Scanners can be configured to act as APs or clients.

Hi all, We've been exploring the capabilities of the Network.framework for peer-to-peer communication and have run into some behavior that we haven't been able to fully explain with the existing documentation. In our tests, we’re working with 12 iOS devices, all disconnected from Wi-Fi to force communication over Apple Wireless Direct Link (AWDL). While using the Network.framework to create peer-to-peer connections, we observed that the number of connected peers never exceeded 8, despite all 12 devices being active and configured identically. Some questions we’re hoping to get clarification or discussion on: Is there a known upper limit to the number of peer-to-peer connections supported via AWDL? Are there conditions under which the framework or system limits or throttles visible peers? Does AWDL behavior vary by hardware model, iOS version, or backgrounding state of the app? Is there any official documentation or guidance around peer discovery or connection limits when using NWBrowser and NWConnection in a peer-to-peer context? We’d appreciate any insights from the Apple engineering team or other developers who have worked with larger peer groups using Network.framework in peer-to-peer mode.

I am developing a VoIP application that uses NetworkExtension (Local PUSH function) And VoIP(APNs) PUSH. Since iPhone X, iPhones have supported eSIM, allowing for the simultaneous use of a physical SIM and an eSIM. Consequently, users of our VoIP app have requested the ability to lock the network used by the VoIP app to either the eSIM or the physical SIM. Our VoIP app utilizes the network through the socket API. Is there an API in the iOS SDK to lock the network used via sockets to either the eSIM or the physical SIM? In other words, we would like to be able to retrieve the IP address assigned to the eSIM or the physical SIM in advance, and know which IP address is assigned to which SIM. Are there any such APIs available (that are not "Deprecated")

When installing a new version the app while a tunnel is connected, seemingly the old packet tunnel process gets stopped but the new one does not come back up. Reportedly, a path monitor is reporting that the device has no connectivity. Is this the expected behavior? When installing an update from TestFlight or the App store, the packet tunnel instance from the old tunnel is stopped, but, due to the profile being on-demand and incldueAllNetworks, the path monitoring believes the device has no connectivity - so the new app is never downloaded. Is this the expected behavior? During development, the old packet tunnel gets stopped, the new app is installed, but the new packet tunnel is never started. To start it, the user has to toggle the VPN twice from the Settings app. The tunnel could be started from the VPN app too, if we chose to not take the path monitor into account, but then the user still needs to attempt to start the tunnel twice - it only works on the second try. As far as we can tell, the first time around, the packet tunnel never gets started, the app receives an update about NEVPNStatus being set to disconnecting yet NEVPNConnection does not throw. The behavior I was naively expecting was that the packet tunnel process would be stopped only when the new app is fully downloaded and when the update is installed, Are we doing something horribly wrong here?

Hi, I'm developing a security-focused iOS application and would like to detect potentially suspicious rogue access points. Specifically, I need to access the BSSID of the currently connected Wi-Fi network to analyze and identify inconsistencies (e.g. multiple APs using the same SSID). I understand that access to certain network information is restricted on iOS. Is it possible to use the Network Extension framework (or any approved API) to retrieve the BSSID? If so, are there any specific entitlements or usage descriptions required to ensure App Store approval? My goal is to implement this functionality in full compliance with App Store Review Guidelines and user privacy policies.

Hello everyone, I'm trying to figure out how to transmit a UIImage (png or tiff) securely to an application running in my desktop browser (Mac or PC). The desktop application and iOS app would potentially be running on the same local network (iOS hotspot or something) or have no internet connection at all. I'm trying to securely send over an image that the running desktop app could ingest. I was thinking something like a local server securely accepting image data from an iPhone. Any suggestions ideas or where to look for more info would be greatly appreciated! Thank you for your help.

Apple's Wi-Fi Aware demo shows that pairing is required before establishing a connection. Is this pairing mandatory? Can Android devices pair with Apple devices? My Android device strictly supports Wi-Fi Aware 4.0 and I want to achieve interoperability with Apple devices.

Most apps perform ordinary network operations, like fetching an HTTP resource with URLSession and opening a TCP connection to a mail server with Network framework. These operations are not without their challenges, but they’re the well-trodden path. If your app performs ordinary networking, see TN3151 Choosing the right networking API for recommendations as to where to start. Some apps have extra-ordinary networking requirements. For example, apps that: Help the user configure a Wi-Fi accessory Require a connection to run over a specific interface Listen for incoming connections Building such an app is tricky because: Networking is hard in general. Apple devices support very dynamic networking, and your app has to work well in whatever environment it’s running in. Documentation for the APIs you need is tucked away in man pages and doc comments. In many cases you have to assemble these APIs in creative ways. If you’re developing an app with extra-ordinary networking requirements, this post is for you. Note If you have questions or comments about any of the topics discussed here, put them in a new thread here on DevForums. Make sure I see it by putting it in the App & System Services > Networking area. And feel free to add tags appropriate to the specific technology you’re using, like Foundation, CFNetwork, Network, or Network Extension. Links, Links, and More Links Each topic is covered in a separate post: The iOS Wi-Fi Lifecycle describes how iOS joins and leaves Wi-Fi networks. Understanding this is especially important if you’re building an app that works with a Wi-Fi accessory. Network Interface Concepts explains how Apple platforms manage network interfaces. If you’ve got this far, you definitely want to read this. Network Interface Techniques offers a high-level overview of some of the more common techniques you need when working with network interfaces. Network Interface APIs describes APIs and core techniques for working with network interfaces. It’s referenced by many other posts. Running an HTTP Request over WWAN explains why most apps should not force an HTTP request to run over WWAN, what they should do instead, and what to do if you really need that behaviour. If you’re building an iOS app with an embedded network server, see Showing Connection Information in an iOS Server for details on how to get the information to show to your user so they can connect to your server. Many folks run into trouble when they try to find the device’s IP address, or other seemingly simple things, like the name of the Wi-Fi interface. Don’t Try to Get the Device’s IP Address explains why these problems are hard, and offers alternative approaches that function correctly in all network environments. Similarly, folks also run into trouble when trying to get the host name. On Host Names explains why that’s more complex than you might think. If you’re working with broadcasts or multicasts, see Broadcasts and Multicasts, Hints and Tips. If you’re building an app that works with a Wi-Fi accessory, see Working with a Wi-Fi Accessory. If you’re trying to gather network interface statistics, see Network Interface Statistics. There are also some posts that are not part of this series but likely to be of interest if you’re working in this space: TN3179 Understanding local network privacy discusses the local network privacy feature. Calling BSD Sockets from Swift does what it says on the tin, that is, explains how to call BSD Sockets from Swift. When doing weird things with the network, you often find yourself having to use BSD Sockets, and that API is not easy to call from Swift. The code therein is primarily for the benefit of test projects, oh, and DevForums posts like these. TN3111 iOS Wi-Fi API overview is a critical resource if you’re doing Wi-Fi specific stuff on iOS. TLS For Accessory Developers tackles the tricky topic of how to communicate securely with a network-based accessory. A Peek Behind the NECP Curtain discusses NECP, a subsystem that control which programs have access to which network interfaces. Networking Resources has links to many other useful resources. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = "eskimo" + "1" + "@" + "apple.com" Revision History 2025-07-31 Added a link to A Peek Behind the NECP Curtain. 2025-03-28 Added a link to On Host Names. 2025-01-16 Added a link to Broadcasts and Multicasts, Hints and Tips. Updated the local network privacy link to point to TN3179. Made other minor editorial changes. 2024-04-30 Added a link to Network Interface Statistics. 2023-09-14 Added a link to TLS For Accessory Developers. 2023-07-23 First posted.

On one test machine, our extension wouldn't load, because [NETransparentProxyManager loadAllFromPreferencesWithCompletionHandler] can't find a manager, saying Skipping configuration appname because it is of the wrong type. This is the first time I've seen this behaviour. (The containing app tries to find a configuration, if it can't find it it creates one, then modifies whatever it found or created, then stores it. I don't have the right logging yet for that, so I can't see the error messages. [NSLog instead of os_log_error.])

Greetings.I have an app today that uses multipeer connectivity extensively. Currently, when the user switches away from the app, MPC disconnects the session(s) - this is by design apparently (per other feedback). I'd like to hear if anyone has experimented with iOS9 multitasking / multipeer and whether MPC sessions can stay alive?Thanks

Hi,I am trying to create an NAT64 Network with Sharing options to test my Apps.I did follow the guide provided here https://forums.developer.apple.com/thread/14213But even with the option key pressed the "Create NAT64 Network" check box is still missing.I am using a OS X 10.11Any ideas?!

Hello eveybody,Currently I'm working on an app which connects to a device. During testing I encounter an internal error of NEHotspotConfigurationErrorDomain. See the log snippet:Domain=NEHotspotConfigurationErrorDomain Code=8 "internal error." UserInfo={NSLocalizedDescription=internal error.}This error appears randomly. In one day I encountered it three times. The only solution I can think of is catching this error somehow and then telling the user to restart the device.After this error appears, the wifi functionality of iOS in all third party apps seems to be broken. Only restarting helps as far as I know. Also there seems to be nothing we as app developers can do about it. Therefor I wonder if there is some way to prevent this error somehow? The only solution I can think of is catching this error somehow and then telling the user to restart the device.Also since there is not much information about this error on the web, it would be really nice if someone can clarify whats going on with this error.Regards.

Our app has a network extension (as I've mentioned lots 😄). We do an upgrade by downloading the new package, stopping & removing all of our components except for the network extension, and then installing the new package, which then loads a LaunchAgent causing the containing app to run. (The only difference between a new install and upgrade is the old extension is left running, but not having anything to tell it what to do, just logs and continues.) On some (but not all) upgrades... nothing ends up able to communicate via XPC with the Network Extension. My simplest cli program to talk to it gets Could not create proxy: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named blah was invalidated: failed at lookup with error 3 - No such process." UserInfo={NSDebugDescription=The connection to service named bla was invalidated: failed at lookup with error 3 - No such process.} Could not communicate with blah Restarting the extension by doing a kill -9 doesn't fix it; neither does restarting the control daemon. The only solution we've come across so far is rebooting. I filed FB11086599 about this, but has anyone thoughts about this?

We're encountering an issue with our Network Extension (utilizing NEPacketTunnelProvider and NETransparentProxy) on macOS 14.5 (23F79). On some systems, the VPN fails to automatically start after a reboot despite calling startVPNTunnel(). There are no error messages. Our code attempts to start the tunnel: ....... do { try manager.connection.startVPNTunnel() Logger.default("Started tunnel successfully") } catch { Logger.error("Failed to launch tunnel") } ...... System log analysis reveals the tunnel stopping due to userLogout (NEProviderStopReason(rawValue: 12)) during reboot. However, the Transparent Proxy stops due to userInitiated (NEProviderStopReason(rawValue: 1)) for the same reboot. We need to understand: Why the VPNTunnel isn't starting automatically. Why the userLogout reason is triggered during reboot. Additional Context: We have manually started the VPN from System Settings before reboot.

multicast sockets fail to send/receive on macosx, errno 65 "no route to host". Wireshark and Terminal.app (which have root privileges) both show incoming multicast traffic just fine. Normal UDP broadcast sockets have no problems. Toggling the Security&Privacy -> Local Network setting may fix the problem for some Users. There is no pattern for when multicast socket fails. Sometimes, recreating the sockets fix the problem. Restart the app, sometimes multicast fails, sometimes success (intermittent, no pattern). Reboot machine (intermittent fail) Create a fresh new user on machine, install single version of app, give app permission. (intermittent fail, same as above). We have all the normal entitlements / notarized app. Similar posts here see FB16923535, Related to FB16512666 https://forum.xojo.com/t/udp-multicast-receive-on-mac-failing-intermittant/83221 see my post from 2012 "distinguishing between SENDING sockets and RECEIVING sockets" for source code example of how we bind multicast sockets. Our other socket code is standard "Stevens, et al." code. The bind() is the call that fails in this case. https://stackoverflow.com/questions/10692956/what-does-it-mean-to-bind-a-multicast-udp-socket . Note that this post from 2012 is still relevant, and that it is a workaround to a longstanding Apple bug that was never fixed. Namely, "Without this fix, multicast sending will intermittently get sendto() errno 'No route to host'. If anyone can shed light on why unplugging a DHCP gateway causes Mac OS X multicast SENDING sockets to get confused, I would love to hear it." This may be a hint as to the underlying bug that Apple really needs to fix, but if it's not, then please Apple, fix the Sequoia bug first. These are probably different bugs because in one case, sendto() fails when a socket becomes "unbound" after you unplug an unrelated network cable. In this case, bind() fails, so sendto() is never even called. Note, that we have also tried to use other implementations for network discovery, including Bonjour, CFNetwork, etc. Bonjour fails intermittently, and also suffers from both bugs mentioned above, amongst others.

I am learning how to use DNS-SD from swift and have created a basic CLI app, however I am not getting callback results. I can get results from cli. Something I am doing wrong here? dns-sd -G v6 adet.local 10:06:08.423 Add 40000002 22 adet.local. FE80:0000... dns-sd -B _adt._udp. 11:19:10.696 Add 2 22 local. _adt._udp. adet import Foundation import dnssd var reference: DNSServiceRef? func dnsServiceGetAddrInfoReply(ref: DNSServiceRef?, flags: DNSServiceFlags, interfaceIndex: UInt32, errorCode: DNSServiceErrorType, hostname: UnsafePointer<CChar>?, address: UnsafePointer<sockaddr>?, ttl: UInt32, context: UnsafeMutableRawPointer?) { print("GetAddr'd") print(hostname.debugDescription.utf8CString) print(address.debugDescription.utf8CString) } var error = DNSServiceGetAddrInfo(&reference, 0, 0, DNSServiceProtocol(kDNSServiceProtocol_IPv6), "adet.local", dnsServiceGetAddrInfoReply, nil) print("GetAddr: \(error)") func dnsServiceBrowseReply(ref: DNSServiceRef?, flags: DNSServiceFlags, interfaceIndex: UInt32, errorCode: DNSServiceErrorType, serviceName: UnsafePointer<CChar>?, regType: UnsafePointer<CChar>?, replyDomain: UnsafePointer<CChar>?, context: UnsafeMutableRawPointer?) { print("Browsed") print(serviceName.debugDescription.utf8CString) print(replyDomain.debugDescription.utf8CString) } error = DNSServiceBrowse(&reference, 0, 0, "_adt._udp", nil, dnsServiceBrowseReply, nil) print("Browse: \(error)") Foundation.RunLoop.main.run() Info.plist <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>NSLocalNetworkUsageDescription</key> <string>By the Hammer of Grabthor</string> <key>NSBonjourServices</key> <array> <string>_adt._udp.</string> <string>_http._tcp.</string> <string>_http._tcp</string> <string>_adt._udp</string> </array> </dict> </plist>